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What is the fault of the electronic control system of the asphalt mixing plant? - 30 Jul 2019 09:00



The core of the asphalt mixing plant is its electronic control system. If it has problems, it will bring a lot of trouble to the use.

However, in the actual use process, the electronic control system in the asphalt mixing station will inevitably encounter some problems, how to solve this problem?
If only the meter display of the asphalt mixing station electronic control system is inaccurate, it may indicate that the weighing system is affected by external force; or the sensor drift error causes the weighing zero or the weighing pitch to change; it may also be caused by sensor damage.

In the face of similar problems, the first thing to do is to eliminate the external force of the asphalt mixing station electronic control system and recalibrate the weighing zero.

If it is a multi-sensor weighing, it is necessary to consider the eccentric load; if the eccentric load, a sensor may be damaged or the cable is loose or damaged, in this case, the sensor should be replaced and the cable checked.

Sometimes, the batching accuracy of the asphalt mixing station electronic control system will become worse. It is expressed in the batching process, the weighing value displayed by the batching control meter is accurate, but the weighing value of the ingredients does not match the set value. The accuracy is outside the allowable range.

There are many reasons for such failures, including improper setting of fast and slow ingredients; large fluctuations in feed flow rate result in large changes in overshoot; large changes in dry and wet materials; tolerance setting values ​​are too large; The delay check delay time setting is too short; the meter parameter automatic compensation and the out-of-tolerance check setting are unreasonable; the digital filter and the batch time parameter value setting are unreasonable, and the like.

It must be clarified; the specific cause of the failure in the asphalt mixing plant can be solved in a targeted manner. For example, the initial overshoot should be as close as possible to the actual value; at the same time, the flow rate of the ingredients should be appropriately reduced to ensure the balance of dry and humidity of the material; And the allowable deviation value is set to not exceed the range of the batching accuracy; other parameters should be set reasonably. - Comments: 0

Brief introduction of asphalt concrete mixing station - 27 Jul 2019 09:00



Batch asphalt mixing station composition
Intermittent asphalt mixing station mainly consists of cold silo, cold material distribution system, cold material conveying system, combustion drying system, ventilation dust removal system, hot material hoist, vibrating screen, hot silo, powder conveying system and asphalt conveying. System, metering system, mixing tank, control system, finished material conveying and storage system, asphalt heating and insulation system, etc.

2. Discussion on the chain bin phenomenon of asphalt commercial concrete mixing station
1 First introduce the structure and principle of the vibrating screen.

(ACP4000 forced intermittent asphalt commercial concrete mixing plant for example), the composition mainly includes: RetentionRubber, SupportTube, as well as vibrating screen drive system and supporting electrical components
The working principle is as follows: the hot aggregate is sent to the vibrating screen through the hot aggregate hoist, and the hot aggregate is vibrated and sieved through the vibrating screen. The stones of different specifications pass through the screen into the corresponding hot aggregate silos, which cannot pass through the screen. The super-size of the net enters the overflow bin.

2 Introduction to the structure and principle of the hot silo
The composition mainly includes: SampleChute, HotStoneBinDoorOperatingCylinders, as well as the opening and closing of each hot silo, the positioner of each silo of the brass tube, the matching pneumatic components and the original electrical components.

The working principle is as follows: the hot silo is to classify and store the qualified hot aggregates, and convert them into weight according to the proportion set by the grading. Through the system control, after the coarse matching and the fine matching, the heat is opened and the heat is opened. The aggregate is said to have reached the right quality, stop the ingredients, and then enter the mixing pot, start the ingredients in the next pot, and continue to cycle.

3 Introduction The reasons and treatment methods of the asphalt concrete concrete mixing station are mainly including the following aspects:
1 The phenomenon of string binning is caused by the leakage of the partition between the respective hot silos.

The separation of each hot silo is separated by iron plates. The iron plates have a certain use time. They have a certain wear resistance. After a long time of stone rubbing, the thickness of the iron plate is gradually thinned, just like dripping water. The iron plate is worn through, and more stones between adjacent hot silos will enter the less hot bin from the leaking place, thereby generating a string bin.

2 The breakage of various stones is caused by the breakage of various sieves of different specifications.

Various kinds of sieves of garbage boilers are made of steel bars of different diameters. Their quality is different, and their toughness, rigidity and wear resistance will be different. After a certain stage of use, the steel bars of the sieve will be gradually thinned and straightened. The diameter of the mesh hole becomes large, and the large stone that cannot pass this size will pass through the place where the diameter of the mesh hole becomes larger and enters the stone which has been sieved by the original sieve through the diameter without change, thereby generating a string bin phenomenon.

The solution is to re-weld the damaged area with wear-resistant steel.

3 The phenomenon of the binning caused by the poor blocking effect of the front and rear baffles of each layer of sieve.

The gap between the front and rear baffles and the side spacers of the vibrating screen is too large, causing stones that exceed the size of the screen in contact with the baffles to leak into their corresponding hot bins.

Thus, the phenomenon of the binning occurs.

To solve the problem is to deal with the front and rear baffle blocking effect, as long as there is a gap to fill all the places.

4Because the tension of each screen is not good and the contact between the sides is not tight, the gap between the screen and the side is caused by the vibration of the screen.

The isolated contact plates of each layer of the vibrating screen are arranged in a certain arc from top to bottom.

Therefore, if the sieve is to be in close contact with it, the tensioning tension must reach a certain degree to ensure that the screen will not have a gap with the side when the screen is vibrated, otherwise the string warehouse phenomenon will occur.

The solution is to adjust the tension of each screen to a suitable degree. Generally, the tension spring is tightened to the original length, and the toughness can be appropriately adjusted according to the length of the screen.

5 The plugging of the overflow pipe connected by the vibrating screen and the overflow bin causes the binning phenomenon.

When the overflow pipe connected to the vibrating screen and the overflow bin is blocked, the overflowing stones will not enter the overflow bin through the overflow pipe, and when the flash is more and more, the hot material from the flash will be blocked. In the warehouse, more than the flash will enter the adjacent hot bin with no flash or dissatisfaction, resulting in a binning phenomenon.

The solution is to take out the blockage that is blocked in the overflow pipe and dredge the overflow pipe so that the flash can be smoothly discharged into the overflow bin.

Quality control of asphalt commercial concrete
The quality of asphalt commercial concrete is mainly reflected in the two indexes of stability and flow value. It reflects the high temperature stability and deformation resistance of asphalt commercial concrete, and is closely related to the quality of raw materials and the control of production process.

Therefore, the quality of the mixture should be controlled from the following aspects.

1 Control of raw material quality
The raw materials of asphalt commercial concrete mainly include: coarse aggregate, fine aggregate, mineral powder, asphalt and so on.

1 coarse aggregate coarse aggregate refers to particle size greater than 2.
36mm gravel.

Forming a frame in asphalt commercial concrete to maintain stability.

Therefore its mechanical properties should meet the requirements and have a good shape.

The needle-like content is low, no weathering, no impurities, and the surface roughness has high internal friction.

2 fine aggregates Fine aggregate means the particle size is 0.
Large sand, stone chips, etc. between 36.

It should be clean, free of weathering, free of impurities, and have suitable particle composition and possible angularities to increase the interlocking effect between the particles and reduce the inter-aggregate porosity.

3 Asphalt Asphalt should check whether the indicators such as penetration, ductility and softening point meet the technical requirements of transportation petroleum asphalt before use.

In the choice of asphalt, the high temperature stability and low temperature crack resistance of the asphalt pavement should be considered.

Due to the higher marking of asphalt, the greater the penetration, the lower the consistency. Therefore, different types of asphalt should be selected according to the different pavement levels. The surface layer should be made of thinner asphalt to improve the crack resistance of the surface layer. Thicker asphalt to improve rutting resistance.

The wax content should be controlled below 3%, and the wax content is too high, which has an effect on the high temperature stability and low temperature crack resistance of the road surface, and also affects the adhesion of the asphalt.

4 Filler The role of the filler is to form an asphalt cement with the asphalt to increase the adhesion of the asphalt mixture.

The correctness of the filler formulation is directly related to the free asphalt in the asphalt mixture.

If free asphalt is present, the adhesion of the asphalt mixture will be reduced and oil flooding will occur.

The filler should meet the fineness requirements and no impurities.

In the case of using bagged ore powder, there should be storage space, rainproof, moisture-proof, and ventilated and dry to prevent the mineral powder from getting wet.

Mineral powder that has been agglomerated and damp is strictly unusable.

Sometimes in order to improve the adhesion of asphalt, it is necessary to add additives such as slaked lime, and the slaked lime must be thoroughly eliminated, and the fineness meets the requirements.

Otherwise it will have the opposite effect, affecting the quality of the asphalt mixture.

2 control of the primary distribution of cold materials
The primary material of the cold material is calculated according to the requirements of the mixing ratio, and the rotation speed of the batching motor of each cold storage bin and the height of the material door are calculated to determine the conveying amount of various materials to meet the needs of continuous production of the mixing station.

If the primary material of the cold material is not accurate, there will be a phenomenon of waiting and flashing, which will affect the productivity of the mixing station and the quality of the mixture.

The tester should keep abreast of the feeding situation of the material yard, sample and screen in time, and analyze relevant data.

The primary mix is ​​adjusted according to different raw materials to ensure the stability and continuity of the mixing production.

3 weighing measurement control
The aggregate after heating and drying is sieved by a vibrating sieve and then enters a hot silo of different particle sizes.

The tester must sample and screen the aggregate after the sieve is sieved to determine the proportion of the materials of different sizes in each hot silo.

The hot silo screening must be carried out when the primary cooling material is stable to ensure the accuracy of the screening test.

The production mix ratio grading curve obtained by the screening test analysis should be within the allowable range of the target mix ratio grading curve and meet the technical standards.

4 temperature control
For the batch asphalt mixing station, the asphalt heating temperature is controlled at 150-170 degrees, the aggregate temperature is 10-20 degrees higher than the asphalt temperature, and the factory temperature of the mixture is 140-165 degrees.

If the temperature is not enough, the flower will appear, and if the temperature is too high, the asphalt will burn.

The factory temperature of asphalt mixture directly affects the quality of paving and rolling.

The temperature of the mixture should be checked at any time during the production process and the operator should be notified to adjust it according to the actual situation.

5 mixing of the mixture
After the mixture is uniformly mixed, all the mineral particles are required to be covered by the asphalt, without uneven wrapping, no white matter, no agglomeration or segregation.

Usually, the mixing time of the asphalt mixture is dry mixing for 5 seconds and wet mixing for 45 seconds.

The SMA mix requires dry mixing for 5 seconds and wet mixing for not less than 60 seconds.

It is not possible to reduce the mixing time at will in order to increase productivity.

The mixing blades and lining plates in the mixing tank should be replaced in time after wear to ensure the orderly flow and uniform mixing of the mixture in the mixing tank to improve the mixing quality of the mixture.

6 monitoring of finished materials
The quality inspectors shall inspect each batch of finished materials, and the materials, flowers, segregation, insufficient temperature or over temperature shall be discarded.

The problem is found and feedback to the operator in time for targeted adjustment processing.

The tester conducts random sampling on the mixture every day, conducts experimental analysis according to the test procedure, and feeds the experimental data back to the operator, and finds the problem in time for analysis and resolution. - Comments: 0

Analysis of future development trend of asphalt mixing plant - 24 Jul 2019 09:00



We know that if asphalt mixing plant equipment companies want to maintain a competitive advantage, they should not only follow the main trends of existing development, but also continuously improve their own technical level and product quality. At the same time, they need to pay more attention to brand building and establish their own development. The required sales system.

So, what kind of development trend will the asphalt mixing plant industry show in the future?

In response to this question, we believe that it can be introduced separately from five aspects.

The first major trend is likely to continue to develop large asphalt mixing plant equipment.

In fact, the requirements for the application, technical content, manufacturing difficulty, control methods, energy conservation and environmental protection of large equipment are very strict, and the problems they face will be more complicated and more diverse.

However, the profits it brings will also increase.

The second major trend is to become more inclined to develop asphalt mixing plant equipment with energy saving and environmental protection functionality.

This is not only due to the promotion of national policies, but also the requirements put forward by economic development.

At present, foreign advanced production companies are also aware of this problem, and have advocated and applied technological innovation, and constantly pursued more environmentally friendly equipment, and now have achieved good results.

The third trend presented is the asphalt mixing plant equipment with the recycling function of waste asphalt mixture.

We can see that the recycling rate of waste asphalt mixture in the market is increasing continuously. Therefore, China's demand in this area is also rising.

The fourth trend is toward the direction of automatic and intelligent control.

This will make our production work more efficient and easier to operate.

The last trend is the accessories associated with asphalt mixing plant equipment, especially for the independent development and creation of core components.

We must realize that the core components have always been the main factors restricting the development of China's construction machinery industry.

Only by continuously strengthening the research technology in this area can we get rid of the shackles of foreign component manufacturers. - Comments: 0

Maintenance of drying drum for asphalt mixing plant - 21 Jul 2019 09:01



1, pay attention to routine inspection
asphalt mixing plant drying cylinders have been tested and inspected before leaving the factory, but will be subjected to bumps and vibrations during transport to the site. A thorough inspection should be carried out before use: check that all bolts are tightened; all key pins are reliable Drive in; all drive units are adjusted according to the manufacturer's instructions; all pipes are connected correctly, the pipe joints are safe and reliable; whether the machine is thoroughly lubricated; start the motor and check that all parts can rotate smoothly in the correct direction of rotation; Whether the pressure gauge works normally, whether the safety valve is adjusted at the correct pressure; whether the burner ignition mechanism is applicable and whether the valve is open.

2, the correct method of operation
After the machine is started, it is recommended to manually operate the equipment at the beginning to reach the specified production capacity and discharge temperature before switching to the automatic control mode.

The aggregate should be dried and have as constant a moisture content as possible to maintain a constant final temperature as the aggregate flows through the drying cylinder.

If the aggregate sent to the drying cylinder changes frequently and the water content of each batch changes, the burner should be adjusted frequently to compensate for these changes.

Aggregates directly from the rolling mill have almost constant water content, while aggregates taken from open pits have higher water content, and the water content of different piles varies greatly.

Therefore, the aggregate is preferably taken from the same source.

3, reasonable maintenance
(1) When the equipment is not running, the aggregate is not allowed to stay in the drying cylinder. At the end of each working day, the equipment should be operated to unload the aggregate in the drying cylinder.

When the aggregate in the barrel is unloaded, the burner should be turned off and the simplified body idling for about 30 minutes for cooling, thereby minimizing the effects of deformation or linear operation of the machine.

(2) The drying cylinder support ring should be evenly seated on all the supporting rollers.

The bearings are adjusted for wear and misalignment.

(3) Always check the alignment of the cylinder.

Loosen the thrust roller first to check the extent to which the simplified body can move over the length of the slot on the support bracket.

Then start the drying cylinder. If the simplified body moves back and forth, check that all the supporting rollers have been adjusted for straightness.

If the support roller has been adjusted straight and the cylinder gradually approaches the feed end, the thrust roller is temporarily offset back and forth (so that the drying cylinder is at the correct working angle) until the correct adjustment has been achieved.

If the cylinder gradually approaches the discharge end, the thrust roller is adjusted from the opposite direction.

(4) If the roller track is in contact with only one of the two thrust rollers, the gap plates may be filled under the support roller bearings until they are uniformly pressed over the entire width of the support ring surface.

(5) It is specified that the position of the cylinder is held by the thrust roller, but it must not be used to compensate for the misalignment error.

(6) If a chain drive is installed, a small amount of eight lubricants is required.

The method of adjusting the tension of the chain is to adjust it with the adjusting screw on the support. - Comments: 0

Factors to be considered when selecting dust removal equipment for asphalt mixing plant - 18 Jul 2019 09:00



Asphalt mixing plant will generate a large amount of dust and harmful exhaust gas during construction. In order to reduce the damage caused by these pollutants, relevant dust removal equipment will be deployed for treatment.

At present, two kinds of dust removing devices, which are composed of a cyclone dust collector and a bag filter, are generally used to collect pollutants as much as possible to reduce pollution to meet the national environmental protection regulations.

However, in this process, certain requirements must be met for the selected dust removal equipment.

Especially for the selection of filter materials, because the asphalt mixing plant equipment and the machine bag filter are used after a period of time, the filter material may be damaged due to some reasons, and need to be repaired or replaced.

Therefore, which filter material to choose is a problem worth considering. The usual method is to choose according to the specifications and requirements of the equipment manual or maintenance manual, but it is still not ideal.

Usually, there are many kinds of raw materials used in the filter material to meet different usage requirements. Different raw materials have different characteristics, and the suitable application range or working environment is different.

Therefore, the principle of selecting the asphalt mixing plant and the bag filter is: First, fully understand the physical and chemical properties of the dust-containing gas discharged during the production process, and then carefully analyze the technical properties of different fibers, and make selections. .

When selecting filter media, factors that should be considered are: physical and chemical properties of dust-containing gas, including temperature, humidity, corrosivity, flammability and explosiveness.

The properties of dust-containing gases under different conditions are different and will be affected by many factors. The rain-shoe gas also contains corrosive substances. In comparison, the PTFE fiber called Plastic King has excellent performance. Attributes, but expensive, therefore, in selecting the asphalt mixing plant and the bag filter filter material, it is necessary to grasp the main factors according to the chemical composition of the dust-containing gas, and select the appropriate material.

In addition, according to the size of the dust particles, the filter material of the asphalt mixing station and the bag filter should be selected. This needs to focus on the physical selection of the dust, the correct selection of the material, structure and post-treatment of the filter material. The shape and particle size distribution of the dust are selected. - Comments: 0

Skill characteristics of plug valve in asphalt mixing plant - 15 Jul 2019 09:00



The plug valve is a kind of closing or plunger-shaped rotary valve. After rotating 90 degrees, the passage opening on the plug is the same as or separated from the passage opening on the valve body to open or close. It is widely used in oil field excavation, transportation and In scouring equipment, such valves are also required in asphalt mixing plants.

The plug of the plug valve in the asphalt mixing plant may be cylindrical or conical in shape, and in the cylindrical plug, the passage is generally rectangular; and in the tapered plug, the passage is trapezoidal.

These shapes make the structure of the plug valve light and are well suited for use as a plugging and closing medium as well as for shunting.

Since the movement between the sealing surfaces of the plug valve has a scrubbing effect, and the touch with the movable medium can be completely avoided when fully opened, it can generally also be used for a medium with suspended particles.

In addition, another important feature of the plug valve is that it is easy to get used to the multi-channel structure, so that one valve can achieve two, three, or even four different flow paths, which simplifies the piping system and reduces the valve usage. And some of the fittings needed in the equipment.

Because the plug valve of asphalt mixing station is quick and easy to open and close, it is suitable for frequent operation, and it also shows small fluid resistance, simple structure, relatively small volume, light weight, easy maintenance, good sealing performance and no oscillation. Small noise and other advantages.

When the plug valve is used in an asphalt mixing plant, it is not constrained by the direction of the device, and the flow direction of the medium can be any, which further promotes its use in the equipment.

In fact, in addition to the above mentioned range, plug valves can be widely used in petrochemical, chemical, gas, natural gas, liquefied petroleum gas, HVAC occupation and general industry. - Comments: 0

The key role of asphalt mixing plant - 12 Jul 2019 09:00



In the asphalt pavement construction, the asphalt mixing plant plays a key role. The function of the asphalt mixing plant and the operation status of the asphalt mixing plant directly affect the quality of the asphalt mixture. This is related to the quality of all projects and is related to the entire project. progress.

Therefore, the control technology of the asphalt mixing plant at that time was increasingly leading, and the scientific and technological content was increasing. This required the mechanical operators to continuously improve their operational skills, and then they were satisfied with the construction needs, and then ensured the normal operation of the machinery, and demonstrated its due diligence to ensure the quality of the project. Ensure the progress of the project.

Then how to ensure the normal operation of the machinery, and fully demonstrate its due success.

First of all, the operator should be proficient in the structure and operation principle of the mixing station. On this basis, strictly control the details of each production, especially the metering system. Because of the quality of the metering operation, it directly affects the asphalt mixture. Technical indicators.

Regarding the stone metering system, it should be noted
(1) Adhere to each discharge door, and the opening and closing actions are sensitive and agile;
(2) Each discharge port shall be dredged, and there shall be no sediments to ensure that the stone material can flow smoothly and evenly when measuring;
(3) Each discharge door should be closed in time and the seal is outstanding. When the single material is finished, there must be no leakage scene;
(4) Around the weighing hopper, it is necessary to insist on cleaning, no foreign matter, avoiding the fighting, and ensuring that the aggregate is in a completely suspended state at the moment;
(5) Each aggregate load cell, the preload should be balanced, the force should be common, and the induction should be sensitive.

Regarding the powder metering system, the following points should be noted:
(1) Adhere to the dredging of the powder transportation pipeline, and there must be no blockage;
(2) Feeder or valve should be sealed and practiced at the end of measurement; powder should not be leaked;
(3) Frequently remove the dust and dust on the powder measuring bucket to keep it clean;
(4) All measurement systems should be sealed to avoid moisture and agglomeration;
(5) The powder material shall be said to be completely discharged, and there shall be no residual powder inside. The discharge door shall be closed tightly, and no powder shall be leaked during the measurement.

Pay attention to the asphalt measurement system:
(1) Before starting production, the pipeline should be heated to ensure that the asphalt temperature in the system reaches the regular value;
(2) The asphalt spray pipe should be cleaned and unblocked, and some nozzles should not be blocked, otherwise the spray will be uneven, which will affect the mixing and cooperation;
(3) The asphalt spray pump or the open valve should be tightly closed to ensure that there is no dripping after the asphalt spray is finished;
(4) The asphalt metering change valve should be accurate and timely, and the seal should be excellent. The asphalt metering bucket should be strong and sensitive. - Comments: 0

Asphalt Mixing Station Asphalt Fume Treatment Scheme - 09 Jul 2019 09:00



Asphalt mixing station asphalt flue gas purification system
The asphalt flue gas treatment method and its principle and characteristics, combined with the asphalt flue gas environmental protection plan formulated by the unit actually facing the asphalt flue gas problem.

First, the basic situation
I have a 4000 type asphalt mixing station in the unit mixing plant. When the asphalt mixing station is in daily production, a large amount of asphalt fumes will be emitted from the mixing pot. This kind of flue gas not only has an unpleasant smell, but also contains A large number of compounds harmful to the human body, such as benzopyrene, benzopyrene, carbazole and other polycyclic aromatic hydrocarbons, are mostly carcinogenic.

Flue gas spills can cause pollution of the surrounding atmosphere and affect the health of workers.

Although the dust-retaining wall is set in the overflow port of the mixing station, the fine dust dust is serious, and the cold belt conveys the dust.

In order to protect the environment, reduce pollution and reduce cost investment, on the basis of fully researching and absorbing the advanced technology of the same industry, combined with the actual situation of asphalt mixing, we are going to install asphalt mixing bag to remove dust from the flue of the mixing pan to the asphalt. The flue gas is processed.

The dust removal efficiency of the bag filter can reach 97%~99%, and the dust-containing gas is purified to the extent of 50mg/Nm3.

Second, the purification program
The main component of asphalt fume is particle size at 0.
1 - 1.
0μm tar fine mist particles, the main task of asphalt flue gas treatment is to treat these tar fine mist particles so that they are not discharged into the air, minimizing the impact on the environment.

In addition, we also investigated the asphalt flue gas treatment, mainly using the air-exhaust dust removal method and the exhaust gas photo-catalytic activated carbon adsorption method.

The method for controlling asphalt flue gas is as follows:
1. Leading dust removal method:
The flue gas flue is installed in the material feeding port and the stone overflow port of the stirring pot, and the dust generated in the production and the dust generated during the discharging are directly taken away by the air blower, and the dust is filtered by the bag to achieve pure discharge.

(Cold belt conveyor drop dust can be set up with a single machine dust removal treatment)
2. UV photo-oxidation and activated carbon waste gas treatment equipment
It is a special treatment and purification equipment for removing organic waste gas and malodorous gas. By using high-energy ultraviolet light beam to illuminate and combine organic (odorous) exhaust gases such as ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, carbon disulfide and styrene, benzene, etc. The molecular chain structure of an organic odor-like gas converts it into a low molecular compound such as CO2, H20, etc.; because the high-energy ultraviolet beam decomposes oxygen molecules in the air to produce active ozone, ozone has a strong oxidation effect on organic matter, Odorous gases and other irritating odors have an immediate effect.

At the same time, the catalytic layer (nano-titanium dioxide) on both sides of the lamp tube generates a highly chemically active superoxide anion and hydroxyl radical when exposed to ultraviolet light, which can degrade the organic matter, effectively decompose toxic and harmful substances in the malodorous gas and deodorize. The effect, after the decomposition of the malodorous gas, can achieve harmless discharge, does not produce secondary pollution, and at the same time achieves the effect of high efficiency disinfection and sterilization, and then discharged to the outside through the exhaust duct;
Third, flue gas dust purification system technology
The entire flue gas treatment unit includes two parts: flue gas collection and flue gas absorption.

In view of the characteristics of asphalt fume and overflow mouth dust generated in the asphalt mixing production process, it is necessary to install a dust collecting hood at the material feeding port of the stirring pan, and the dust collecting hood is semi-closed, which greatly reduces the overflow of the asphalt flue gas.

In addition, after the asphalt material is loaded, some of the flue gas will overflow from the vehicle. Therefore, it is necessary to make a flue gas hood to extend the dust collector to the front end of the vehicle, and try to recover all the asphalt flue gas.

Air and dust removal and uv photo-catalytic activated carbon method
In the asphalt mixing station, the flue of the asphalt flue gas and dust is installed at the material feeding port, the asphalt flue is connected with the dust removing flue, and the asphalt flue gas is filtered and discharged by the bag dust removal.

1, system design points
First, install a dust cover under the mixing pot to semi-close the lower opening to prevent the smoke and dust from overflowing.

Secondly, the pipeline should be installed in the dust and dust cover of the overflow, and the main component of the asphalt smoke is the particle size of 0.
1 - 1.
0 μm tar fine mist particles.

During the production process, the asphalt flue gas enters the dust removal flue through the pipeline. There is a large amount of dusty gas in the flue. The dust in the dusty gas will be combined with the tar fine mist particles in the asphalt flue gas. Cleared, the cleaning gas is discharged through the induced draft fan.

2, the process
(1) Asphalt smoke and overflow mouth dust cover of the mixing pot under the mixing pot → Bag dust removal → UV photo-oxygen activated carbon waste gas treatment → induced draft fan
(2) Belt conveyor drop dust cover → bag dust removal → induced draft fan
Fourth, the conclusion
Protecting the ecological environment, the fundamental interests of the broad masses of the people, and the long-term interests of the development of the Chinese nation are the undertakings of the present and the future.

Only by deeply realizing that the environment is profoundly influential to the development of the country and the people can we effectively act to protect the environment, and in order to have blue sky, clear water, green hills and green land, and to continuously meet environmental protection requirements, we can promote technological upgrading of enterprises and obtain economic benefits. And a win-win situation for social benefits. - Comments: 0

Planning and construction of mobile asphalt plant - 06 Jul 2019 12:00



After the location of the asphalt mixing plant is selected, the next step is to develop appropriate planning and construction work.

In general, the site planning for mobile asphalt plants should follow the two requirements of science and rationality.

That is to say, when planning, the utilization and effectiveness of the site should be maximized to meet the requirements of production to the greatest extent.

So, what factors should we consider when planning and building work? First, be sure to choose the location of the asphalt mixing plant.

In general, the location of the asphalt mixing plant of the mobile asphalt plant should meet these requirements: 1. The selected site is relatively solid in geology. 2. The workload of site solidification should be appropriately reduced. 3. If it is required to mix. If the foundation foot is used to construct a cement concrete foundation, it should ensure that the concrete bearing capacity can meet the design requirements.

Secondly, when constructing a mobile asphalt plant, it should be combined with the actual situation to select a suitable stockyard.

Specifically, it is necessary to refer to the variety requirements of different asphalt concrete mixed materials to make a reasonable division of the stockyard.

In the planning process, it must be noted that the requirements of different varieties should be met while meeting the interval requirements.

Moreover, different stacking areas should be properly isolated and marked to avoid stacking chaos and result in work efficiency.

In addition, the foundation of the stockpiling area should be solidified to meet the needs of the work.

Then, at the time of planning, it is also necessary to reasonably plan the route of the raw material transportation vehicle, the route of the finished material transportation vehicle, and the route of production and feeding, as the site conditions permit.

It should be noted that when constructing a mobile asphalt plant, the construction safety should be ensured as much as possible.

Finally, rationally plan the distance between different devices to ensure safe production and ensure the efficiency of work.

When constructing a mobile asphalt plant, we should fully consider these requirements. - Comments: 0

asphalt mixing plant installation guide - 04 Jul 2019 09:04



First, the installation of mixing equipment
1. Site selection
(1) Principle Large-scale asphalt mixing plant has a large area, and stone materials must be stored in a certain amount.

When selecting the site, it should be close to the roadbed of this tender and located near the midpoint of the tender. The water and electricity sources are convenient, and the transportation of raw materials and finished materials is convenient.

(2) Natural conditions of the site The environment on the ground should be dry, the terrain is slightly higher, the groundwater level is lower, and the site with good geological conditions can be selected to reduce the cost of equipment installation and avoid equipment deformation caused by settlement.

Since the water content of raw materials has a great influence on the production of asphalt mixing plant, the water content is high, the fuel consumption is increased, the production capacity is also reduced, and the utility cost is increased. Therefore, there is a good drainage system around the equipment.

2, installation
(1) Preparation before installation
1 Before all the auxiliary equipment and complete sets of equipment are delivered to the site, draw the mutual position map of each assembly and foundation to ensure a successful lifting during installation;
2 The installation site should meet the requirements, and make three links and one leveling;
3 Organize an experienced installation team to enter the construction site. The installation personnel are equipped as follows:
1 organizer, 2 technicians (1 mechanical engineer, 1 electrical engineer), 4 fitters, 2 electricians, 1 electric welder, 1 management worker, 1 lifting crane, 4-6 laborers , 2 woodworkers.

(2) Installation of necessary equipment
Steam crane (lifting capacity is selected according to the largest component of the equipment); 1 5t jack, 1 30m large rope, 1 ladder with 10m telescopic ladder, 1 ladder with more than 3m, crowbar, sledgehammer, big scissors, hand Common tools such as saws, grinders, crimping tools, various wrenches, seat belts and level gauges are available, and one ZL50 loader.

(3) The main sequence of installation. - Comments: 0

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