Flue gas treatment system of full-regeneration asphalt stirring equipment

Abstract

The utility model relates to the technical field of asphalt pavement recycled material separation equipment, in particular to a flue gas treatment system of full-recycled asphalt stirring equipment, which comprises a recycled cold material collecting and distributing device, a recycled material drying system and a recycled hot material temporary storage bin, an elevator is arranged between the regenerated cold material collecting and distributing device and the regenerated material drying system, and a discharge port of the regenerated material drying system is communicated with the regenerated hot material temporary storage bin; the flue gas treatment system comprises a flue gas box, a cyclone dust removal box, a wet dust collector and an ultrahigh-pressure electromagnetic purification device which are communicated with the top of the regenerated hot material temporary storage bin, two sides of the flue gas box are respectively communicated with a secondary flue gas return pipe and a main flue gas pipe, and the other end of the secondary flue gas return pipe is communicated with a combustion chamber of the regeneration drying system; and the other end of the main flue gas pipe is communicated with a gas inlet pipe of the cyclone dust removal box. The flue gas treatment system of the full-regeneration asphalt stirring equipment can be used for treating mixed smoke generated by pavement recycled materials, so that the environment-friendly standard is met.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt recycling equipment, in particular to a flue gas treatment system for a fully recycled asphalt mixing equipment. Background Art

[0002] With the booming development of highway construction in recent decades, the quantity of waste asphalt mixture generated annually due to road renovation and major repair is increasing day by day. If these waste asphalt mixtures cannot be reasonably utilized, it will cause huge waste of resources and environmental pollution to society. When the existing pavement recycling material full recycling equipment and process are in production, the concentration of the generated flue gas is relatively high and fails to meet the environmental protection standards. Because solid-liquid hydrocarbon particles and gaseous hydrocarbon substances mixed smoke will be generated when the recycled material is heated, a single treatment process cannot completely handle it. Content of the Utility Model

[0003] To overcome the technical defects existing in the prior art, the utility model provides a flue gas treatment system for a fully recycled asphalt mixing equipment, which can treat the mixed smoke generated by the pavement recycled material and meet the environmental protection standards.

[0004] The technical solution adopted by the utility model is: a flue gas treatment system for a fully recycled asphalt mixing equipment. The fully recycled asphalt mixing equipment includes a recycled cold material batching device, a recycled material drying system, and a recycled hot material temporary storage bin. A hoist is arranged between the recycled cold material batching device and the recycled material drying system, and the discharge port of the recycled material drying system is communicated with the recycled hot material temporary storage bin.

[0005] The flue gas treatment system includes a flue gas box, a cyclone dust collector, a wet dust collector, and an ultra-high voltage electromagnetic purification device which are connected to the top of the recycled hot material temporary storage bin. Two secondary flue gas return pipes and a main flue gas pipe are respectively connected to both sides of the flue gas box. The other end of the secondary flue gas return pipe is communicated with the combustion chamber of the recycled drying system, the other end of the main flue gas pipe is communicated with the air inlet pipe of the cyclone dust collector, the exhaust pipe of the cyclone dust collector is communicated with the air inlet of the wet dust collector, and the air outlet hole of the wet dust collector is communicated with the air inlet of the ultra-high voltage electromagnetic purification device.

[0006] Preferably, the fully recycled asphalt mixing equipment further includes a frame. The recycled cold material batching device is arranged on one side of the frame, the recycled material drying system is installed on the top of the frame, and the hoist is installed at the side end of the frame.

[0007] Preferably, the recycled material drying system includes a drying drum arranged on the top of the frame and a burner arranged at the feeding end of the drying drum. A combustion chamber is further arranged at the feeding end of the drying drum, and the discharging end of the drying drum is communicated with the recycled hot material temporary storage box.

[0008] Preferably, the secondary flue gas return pipe is connected to the combustion chamber of the drying drum.

[0009] Preferably, a recycled material metering system and a recycled material mixing system are successively arranged below the discharge port of the recycled hot material temporary storage bin.

[0010] Preferably, the recycled material metering system includes a recycled material metering hopper device and an asphalt addition metering device.

[0011] Preferably, a screw conveyor is arranged at the bottom of the cyclone dust removal box.

[0012] Preferably, an induced draft fan is arranged on the secondary flue gas return pipe.

[0013] The beneficial effects of the present utility model are as follows: The flue gas treatment system of the fully recycled asphalt mixing equipment of the present utility model can treat the mixed smoke generated during the recovery of road surface waste materials. Specifically, it recovers the coarse particulate matter in the flue gas and treats the fine particulate matter in the dust and the gaseous mixed smoke respectively to meet the environmental protection requirements. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the flue gas treatment system of the fully recycled asphalt mixing equipment of the present utility model.

[0015] Figure 2 It is Figure 1 The partial enlarged view at position B in

[0016] Figure 3 It is a schematic diagram of the flue gas flow of the flue gas treatment system of the fully recycled asphalt mixing equipment of the present utility model.

[0017] Figure 4 It is Figure 3 The partial enlarged view at position A in

[0018] Description of the reference numerals: 1. Recycled cold material batching device; 101. Silo; 102. Variable-frequency belt conveyor; 103. Feeding conveyor; 2. Hoist; 3. Recycled drying system; 301. Burner; 302. Drying drum; 4. Recycled hot material temporary storage bin; 5. Recycled material metering system; 6. Recycled material mixing system; 7. Frame; 8. Flue gas box; 9. Secondary flue gas return pipe; 901. Induced draft fan; 10. Main flue gas pipe; 11. Cyclone dust removal box; 12. Screw conveyor; 13. Wet dust collector; 1301. Separation cylinder; 1302. Traction fan; 1303. Spray pipe; 1304. Liquid collecting tank; 14. Ultra-high voltage electromagnetic purification device. Detailed Embodiments

[0019] The present utility model will be further described below in conjunction with the drawings:

[0020] As Figures 1 to 4As shown in the figure, this embodiment provides a flue gas treatment system for a fully recycled asphalt mixing equipment. The fully recycled asphalt mixing equipment includes a recycled cold aggregate batching device 1, a recycled aggregate drying system, and a recycled hot aggregate temporary storage bin 4. A hoist 2 is provided between the recycled cold aggregate batching device 1 and the recycled aggregate drying system, and the discharge port of the recycled aggregate drying system is communicated with the recycled hot aggregate temporary storage bin 4.

[0021] The flue gas treatment system includes a flue gas box 8, a cyclone dust collector 11, a wet dust collector 13, and an ultra-high voltage electromagnetic purification device 14 connected to the top of the recycled hot aggregate temporary storage bin 4. The two sides of the flue gas box 8 are respectively communicated with a secondary flue gas return pipe 9 and a main flue gas pipe 10. The other end of the secondary flue gas return pipe 9 is communicated with the combustion chamber of the recycled drying system 3, and the other end of the main flue gas pipe 10 is communicated with the intake pipe of the cyclone dust collector 11. The exhaust pipe of the cyclone dust collector 11 is communicated with the intake port of the wet dust collector 13, and the air outlet hole of the wet dust collector 13 is communicated with the intake port of the ultra-high voltage electromagnetic purification device 14.

[0022] In this embodiment, the fully recycled asphalt mixing equipment further includes a frame 7. The recycled cold aggregate batching device 1 is arranged on one side of the frame 7, the recycled aggregate drying system is installed on the top of the frame 7, and the hoist 2 is installed at the side end of the frame 7.

[0023] The recycled cold aggregate batching device 1 of this embodiment includes a plurality of bins 101 and a variable-frequency belt conveyor 102 cooperating with the bins 101. A filter grid is provided at the top of each bin 101, and a variable-frequency belt conveyor 102 is provided at the bottom outlet of each bin 101. An up-feeding conveyor 103 is provided between the recycled cold aggregate batching device 1 and the feed inlet of the hoist 2. The variable-frequency belt conveyor 102 is arranged at the up-feeding end of the up-feeding conveyor 103. The plurality of bins 101 are stored in separate bins according to the types and specifications of the recycled aggregates, and are quantitatively conveyed by the variable-frequency belt conveyor 102. The output recycled aggregates are conveyed to the hoist 2 through the up-feeding conveyor 103, and the hoist 2 lifts the recycled aggregates to the drying drum 302 through a bucket.

[0024] In this embodiment, the recycled material drying system includes a drying drum 302 provided at the top of the frame 7 and a burner 301 provided at the feed end of the drying drum 302. A combustion chamber is further provided at the feed end of the drying drum 302. The drying drum 302 is rotatably installed on the frame 7 and is driven to rotate by a driving mechanism. The discharge end of the drying drum 302 is communicated with the recycled hot material temporary storage bin 4. The drying drum 302 of this embodiment has a combustion chamber, and blades are provided on the inner wall of the drying drum 302. When the drying drum 302 rotates, the recycled material forms a material curtain under the action of the blades, and the recycled material comes into full contact with the hot air generated by the burner 301 for effective heat exchange to reach the required material temperature. The drying drum 302 of this embodiment is inclined, and the recycled material moves towards the discharge port of the drying drum 302 during heat exchange.

[0025] The recycled hot material temporary storage bin 4 of this embodiment is used to store recycled hot materials. It has a stainless steel anti-sticking inner lining. Thermal insulation cotton and heat transfer oil are provided outside the recycled hot material temporary storage bin 4 for thermal insulation. A discharge door is provided at the bottom of the recycled hot material temporary storage bin 4, and the discharge door is controlled to open and close by a double cylinder to achieve accurate feeding. The recycled hot materials of this embodiment are conveyed from top to bottom, avoiding the problem of sticking materials. The frame 7 of this embodiment is assembled by frames and can be quickly installed.

[0026] In this embodiment, a recycled material metering system 5 and a recycled material mixing system 6 are sequentially provided below the discharge port of the recycled hot material temporary storage bin 4. The recycled material metering system 5 of this embodiment includes a recycled material metering hopper device and an asphalt addition metering device, and a modified material addition device required for the road surface can also be provided. The recycled material mixing system 6 of this embodiment uses a horizontal double-shaft mixer to mix the recycled material and the added material into a finished product.

[0027] When the cigarette treatment system of this embodiment is in operation, the flue gas box 8 serves as the first buffer box for flue gas treatment. The flue gas is divided into two paths at the flue gas box 8. One path flows through the secondary return flue pipe 9 to the drying drum 302, and the remaining flue gas flows through the main flue pipe 10 to the cyclone dust removal box 11. A screw conveyor 12 is provided at the bottom of the cyclone dust removal box 11. The cyclone dust removal box 11 introduces the flue gas from the main flue pipe 10 into the cyclone pipe group. In the cyclone pipe group, the coarse powder particles settle. The coarse powder particles contain bituminous stones and can be recycled. Further, they are output through the screw conveyor 12. The flue gas after the first treatment flows through the exhaust pipe of the cyclone dust removal box 11 to the wet dust collector 13. The wet dust collector 13 of this embodiment includes a separation cylinder 1301, a traction fan 1302 provided at the top of the separation cylinder 1301, and a liquid collection tank 1304 provided at the lower part of the separation cylinder 1301. A spray pipe 1303 is provided at the air inlet of the wet dust collector 13. The spray pipe 1303 is communicated with the liquid collection tank 1304. A spray pump is arranged in the liquid collection tank 1304. The outlet of the spray pump is communicated with the spray pipe 1303. The particles in the flue gas are mixed with the spray water when entering the wet dust collector 13 to form a mixed liquid droplet with a larger mass, and under the action of the traction fan 1302, it enters the separation cylinder 1301 at a high speed to form a vortex. Under the action of the centrifugal force, the mixed liquid droplet is completely separated from the gaseous molecules. The mixed liquid droplet falls into the liquid collection tank 1304 for storage and recycling. The wet dust collector 13 of this embodiment can treat particulate pollutants above 5 microns.

[0028] The flue gas treated by the wet dust collector 13 still contains pollutants such as particulate components and odor molecules. The ultra-high voltage electromagnetic purification device 14 of this embodiment can generate a strong electric field and a magnetic field. The strong electric field charges the particulate matter in the flue gas. The charged particles move towards the dust collection electrode and are adsorbed under the action of the electric field. The magnetic field cooperates with the electric field to enhance the movement of the charged particles and improve the purification efficiency. The strong electric field can also ionize gas molecules to generate active groups with higher energy. The pollutants in the waste gas react with these active groups with higher energy and are finally converted into substances such as carbon dioxide and water, so as to achieve the purpose of purifying the waste gas.

[0029] The secondary return flue pipe 9 of this embodiment is communicated with the feeding end of the drying drum 302. An induced draft fan 901 is provided on the secondary return flue pipe 9. Under the action of the induced draft fan 901, a part of the flue gas flows into the combustion chamber of the drying drum 302 for combustion treatment. At the same time, the air flow introduced into the combustion chamber forms a circulating air flow in the drying drum 302, which can control the temperature in the drying drum within a specified range and avoid the temperature of the drying drum 302 being too high due to continuous heating by the burner 301.

[0030] When the flue gas treatment system of the fully recycled asphalt mixing equipment in this embodiment is working, recycled materials are put into the storage bin 101. The recycled materials are conveyed to the drying drum 302 through the variable-frequency belt conveyor 102, the feeding conveyor 103 and the elevator 2 for heating and drying. The dried recycled materials reach the recycled hot material temporary storage bin 4. The recycled hot material temporary storage bin 4 can feed the recycled materials into the recycled material metering system 5. Additives are fed through the asphalt addition metering device or the modified material addition device. The recycled materials and the additives are metered through the recycled material metering hopper device. The recycled material metering system 5 conveys the recycled materials and the fed materials to the recycled material mixing system 6 for mixing to obtain the finished materials. Flue gas is generated during the drying process of the recycled materials. Under the action of the induced draft fan 901, a part of the flue gas flows into the combustion chamber of the drying drum 302 for combustion treatment, and the other part of the flue gas is sequentially purified through the cyclone dust removal box 11, the wet dust collector 13 and the ultra-high voltage electromagnetic purification device 14. The flue gas treatment system of the fully recycled asphalt mixing equipment in this embodiment can treat the mixed smoke generated when recycling road surface waste. Specifically, it recovers the coarse particulate dust in the flue gas and treats the fine particulate dust and gaseous mixed smoke respectively to meet the environmental protection requirements.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. The flue gas treatment system of a fully recycled asphalt mixing plant, characterized in that: The all-recycled asphalt mixing equipment includes a recycled cold aggregate batching device, a recycled material drying system, and a recycled hot material temporary storage bin. A hoist is provided between the recycled cold aggregate batching device and the recycled material drying system, and the discharge port of the recycled material drying system is communicated with the recycled hot material temporary storage bin; The flue gas treatment system includes a flue gas box, a cyclone dust collector, a wet dust collector, and an ultra-high voltage electromagnetic purification device connected to the top of the recycled hot material temporary storage bin. The two sides of the flue gas box are respectively communicated with a secondary flue gas return pipe and a main flue gas pipe. The other end of the secondary flue gas return pipe is communicated with the combustion chamber of the recycled drying system, the other end of the main flue gas pipe is communicated with the intake pipe of the cyclone dust collector, the exhaust pipe of the cyclone dust collector is communicated with the intake port of the wet dust collector, and the air outlet hole of the wet dust collector is communicated with the intake port of the ultra-high voltage electromagnetic purification device.

2. The flue gas treatment system of the fully recycled asphalt mixing equipment according to claim 1, characterized in that: The all-recycled asphalt mixing equipment further includes a frame. The recycled cold aggregate batching device is arranged on one side of the frame, the recycled material drying system is installed on the top of the frame, and the hoist is installed at the side end of the frame.

3. The flue gas treatment system of the fully recycled asphalt mixing equipment according to claim 2, characterized in that: The recycled material drying system includes a drying drum arranged on the top of the frame and a burner arranged at the feeding end of the drying drum. A combustion chamber is also arranged at the feeding end of the drying drum, and the discharging end of the drying drum is communicated with the recycled hot material temporary storage box.

4. The flue gas treatment system of the fully recycled asphalt mixing equipment according to claim 3, wherein: The secondary flue gas return pipe is communicated to the combustion chamber of the drying drum.

5. The flue gas treatment system for the fully recycled asphalt mixing equipment according to claim 1, wherein: Below the discharge port of the recycled hot material temporary storage bin, a recycled material metering system and a recycled material mixing system are successively arranged.

6. The flue gas treatment system of the fully recycled asphalt mixing equipment according to claim 5, characterized in that: The recycled material metering system includes a recycled material metering hopper device and an asphalt addition metering device.

7. The flue gas treatment system of the fully recycled asphalt mixing equipment according to claim 1, characterized in that: A screw conveyor is arranged at the bottom of the cyclone dust collector.

8. The flue gas treatment system of the fully recycled asphalt mixing equipment according to claim 1, wherein: An induced draft fan is arranged on the secondary flue gas return pipe.

Images