Waste gas treatment structure of asphalt stirring device

Abstract

The utility model discloses a waste gas treatment structure of an asphalt stirring device, which belongs to the technical field of waste gas treatment in asphalt production and comprises a stirring tank, a top cover arranged at the top of the stirring tank, a first connecting pipe fixedly mounted in the top cover, a first short pipe arranged at one end of the first connecting pipe, a filter box fixedly mounted at the bottom of the first short pipe, and a second short pipe arranged at the other end of the filter box. A primary filter plate and a secondary filter plate are arranged in the filter box, a second connecting pipe is fixedly installed at the bottom of the filter box, through layer-by-layer filtration, solid pollutants in waste gas can be effectively reduced, the disassembly structure is simple and convenient to operate, the primary filter plate and the secondary filter plate can be conveniently and rapidly disassembled and installed, and the practicability is high. The filter plate can be quickly taken out for maintenance, cleaning and replacement, high-temperature waste gas can be cooled, the subsequent spraying and purifying effect can be effectively improved after the temperature of the waste gas is reduced, water mist sprayed by the spraying assembly is fully mixed with the waste gas, and the content of pollutants is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of asphalt production waste gas treatment technology, and in particular to a waste gas treatment structure for asphalt mixing devices. Background Technology

[0002] In the fields of road construction and municipal engineering, asphalt mixing plants are the core equipment for producing asphalt mixtures. However, their operation generates a large amount of dust-laden, harmful gases and high-temperature exhaust gas. Improper treatment can seriously harm the environment and human health. Currently, traditional exhaust gas treatment technologies for asphalt mixing plants have many shortcomings. Regarding exhaust gas filtration, most equipment uses only a single-layer filtration structure or has rudimentary filter component designs, making it difficult to effectively intercept solid pollutants in the exhaust gas. Larger particles and dust easily penetrate the filter layer, not only resulting in substandard exhaust gas cleanliness and air pollution, but also causing blockages in subsequent cooling tanks, spray towers, and other equipment due to impurity accumulation in the condenser pipes and spray heads, affecting normal equipment operation, increasing maintenance costs, and raising equipment failure rates. Furthermore, the disassembly process for traditional filter components is complex, requiring specialized tools and consuming significant manpower and time. With frequent asphalt mixing operations, it is difficult to quickly clean and replace filter plates, leading to prolonged operation with malfunctions and reduced production efficiency. Traditional treatment technologies lack effective control over exhaust gas temperature. High-temperature exhaust gas directly entering the spray tower accelerates water mist evaporation, reducing the contact and adsorption efficiency between the water mist and harmful gases and fine particles, resulting in incomplete removal of pollutants such as sulfur dioxide and nitrogen oxides. Furthermore, a single purification method is insufficient to handle the complex composition of asphalt mixing exhaust gas, lacking in-depth treatment methods for odors and trace harmful substances in the exhaust gas. The final emitted exhaust gas may still contain odors, adversely affecting the surrounding environment. Therefore, we propose an exhaust gas treatment structure for asphalt mixing devices to solve this problem. Utility Model Content

[0003] The purpose of this utility model is to provide a waste gas treatment structure for an asphalt mixing plant to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A waste gas treatment structure for an asphalt mixing plant includes: a mixing tank, a top cover on the top of the mixing tank, a connecting pipe I fixedly installed inside the top cover, a short pipe I at one end of the connecting pipe I, a filter box fixedly installed at the bottom of the short pipe I, a primary filter plate and a secondary filter plate arranged inside the filter box, a connecting pipe II fixedly installed at the bottom of the filter box, a short pipe II at one end of the connecting pipe II, a cooling box fixedly installed at one end of the short pipe II, a straight pipe fixedly installed at one end of the cooling box, a short pipe III at one end of the straight pipe, a spray tower fixedly installed at one end of the short pipe III, and a spraying assembly arranged inside the spray tower. The spray assembly includes: a water outlet pipe, which is fixedly installed inside the spray tower; multiple diversion pipes are fixedly installed on both sides of the water outlet pipe; spray heads are fixedly installed at the bottom of each diversion pipe; one end of the water outlet pipe extends through to one side of the spray tower; a water tank is provided at the bottom of the water outlet pipe; an inlet pipe is provided inside the tank; placement slots are provided inside both sides of the filter box; and disassembly components are provided inside both placement slots. The disassembly components include: a pull plate; a connecting shaft is fixedly installed on one side of the pull plate; and two sets of inclined rods slide against the inside of the pull plate. The two sets of inclined rods are respectively movably inserted into the interior of the primary filter plate and the secondary filter plate.

[0006] Preferably, the two sets of pull plates are slidably installed inside the corresponding placement slots, and two sets of limiting rods are slidably installed inside the two sets of pull plates. Springs are sleeved on the outer sides of the four sets of limiting rods, and the two ends of the two sets of springs on the same side are fixedly connected to the inner wall of one side of the corresponding pull plate and placement slot.

[0007] Preferably, an air pump is fixedly installed at one end of each of the connecting pipe 1, connecting pipe 2, and straight pipe. One end of each of the three sets of air pumps is fixedly connected to short pipe 1, short pipe 2, and short pipe 3, respectively. A pump body is fixedly installed at the bottom of each connecting pipe, and one end of the pump body is fixedly connected to the water inlet pipe.

[0008] Preferably, the mixing tank is provided with a stirring shaft inside, and multiple sets of connecting rings are fixedly installed on the outside of the stirring shaft. Multiple sets of stirring rods are fixedly installed on the outside of each set of connecting rings. The stirring shaft is rotatably connected to the top cover. A motor and a feed hopper are fixedly installed on the top of the top cover, and the output shaft of the motor is fixedly connected to the stirring shaft.

[0009] Preferably, the two sets of connecting shafts slide through to both sides of the filter box, and a pull plate is fixedly installed at one end of each set of connecting shafts, and a pull ring is fixedly installed on one side of each set of pull plates.

[0010] Preferably, the cooling box is equipped with a condenser pipe inside, the top of the spray tower is fixedly installed with an exhaust pipe, the inside of the exhaust pipe is fixedly installed with two sets of activated carbon plates, the bottom of one side of both the cooling box and the spray tower is fixedly installed with a drain pipe, the top of the mixing tank is provided with a discharge port, and the side of the filter box is rotatably installed with a door.

[0011] In this utility model, the exhaust gas treatment structure of an asphalt mixing device includes a filter box, a primary filter plate, a secondary filter plate, and a disassembly assembly. The primary and secondary filter plates within the filter box intercept and filter larger particulate impurities and dust in the exhaust gas. Pulling a pull ring causes the connecting shaft and pull plate to slide within a placement groove. As the pull plate slides, it overcomes the spring force, causing the diagonal rod to be pulled out from within the primary and secondary filter plates, thus releasing the filter plates from their fixation. At this point, the primary and secondary filter plates can be removed from the filter box for maintenance. This layer-by-layer filtration effectively reduces solid pollutants in the exhaust gas, lowers the risk of clogging to subsequent cooling boxes, spray towers, and other equipment, and also improves the cleanliness of the final exhaust gas. This disassembly structure is simple and easy to operate, facilitating the quick disassembly and installation of the primary and secondary filter plates. The filter plates can be quickly removed for maintenance, cleaning, and replacement, significantly shortening the time for cleaning or replacing the filter plates. Timely cleaning and replacement of the filter plates can prevent excessive accumulation of impurities from causing clogging and damage to the filter plates, thereby affecting the operation of the entire exhaust gas treatment system.

[0012] In this utility model, the exhaust gas treatment structure of an asphalt mixing device includes a cooling box, a condenser pipe, a spray tower, a spray assembly, and an activated carbon plate. The exhaust gas, after primary filtration, enters the short pipe through the connecting pipe two under the action of the air pump, and then enters the cooling box. The condenser pipe in the cooling box cools the exhaust gas and reduces its temperature. Water in the water tank, under the action of the pump, enters the water outlet pipe through the water inlet pipe. The water outlet pipe distributes the water to the multi-component flow pipe, and finally sprays it downward through the spray head to form a water mist. As the exhaust gas rises within the spray tower, it comes into full contact with the water mist. The water mist adsorbs harmful gases, fine particles, and other pollutants from the exhaust gas, achieving spray purification. The purified exhaust gas then passes through the activated carbon plate in the exhaust pipe at the top of the spray tower. The condenser pipe cools the high-temperature exhaust gas, effectively improving the subsequent spray purification effect. The water mist sprayed from the spray components mixes thoroughly with the exhaust gas, efficiently adsorbing harmful gases such as sulfur dioxide and nitrogen oxides, as well as fine particles that were not intercepted by the primary filter, significantly reducing the pollutant content. The activated carbon plate, with its strong adsorption capacity, further removes residual odors and trace harmful substances from the exhaust gas, completing exhaust gas treatment in a shorter time, improving exhaust gas treatment efficiency, and ensuring the continuous and stable operation of the asphalt mixing plant. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of an asphalt mixing device exhaust gas treatment structure proposed in this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of an asphalt mixing device exhaust gas treatment structure proposed in this utility model.

[0015] Figure 3 This is a schematic diagram of the spray assembly structure proposed in this utility model;

[0016] Figure 4 for Figure 2 A magnified view of part A in the middle;

[0017] Figure 5 for Figure 2 A magnified view of part B in the middle section.

[0018] In the diagram: 1. Mixing tank; 2. Connecting pipe one; 3. Filter box; 4. Primary filter plate; 5. Secondary filter plate; 6. Disassembly assembly; 601. Connecting shaft; 602. Pull plate; 603. Diagonal rod; 604. Limiting rod; 605. Spring; 7. Connecting pipe two; 8. Cooling box; 9. Spray assembly; 901. Water tank; 902. Pump body; 903. Water outlet pipe; 904. Diverter pipe; 905. Spray head; 10. Spray tower; 11. Condenser pipe; 12. Activated carbon plate; 13. Straight pipe; 14. Mixing shaft; 15. Connecting ring; 16. Mixing rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-5A waste gas treatment structure for an asphalt mixing plant includes: a mixing tank 1, a top cover on the top of the mixing tank 1, a connecting pipe 2 fixedly installed inside the top cover, a short pipe 1 at one end of the connecting pipe 2, a filter box 3 fixedly installed at the bottom of the short pipe 1, a primary filter plate 4 and a secondary filter plate 5 inside the filter box 3, a connecting pipe 7 fixedly installed at the bottom of the filter box 3, a short pipe 2 at one end of the connecting pipe 7, a cooling box 8 fixedly installed at one end of the cooling box 8, a straight pipe 13 fixedly installed at one end of the straight pipe 13, a short pipe 3 at one end of the short pipe 3, and a spray tower 10 fixedly installed at one end of the spray tower 10. A spray assembly 9 is installed inside the spray tower 10, and the spray assembly 9 includes: a water outlet pipe 903, a water outlet pipe 904, a water outlet pipe 905, a water outlet pipe 906, a water outlet pipe 907, a water outlet pipe 908, a water outlet pipe 904, a water outlet pipe 905, a water outlet pipe 906, a water outlet pipe 907 ... Water pipe 903 is fixedly installed inside spray tower 10. Multiple diversion pipes 904 are fixedly installed on both sides of water outlet pipe 903. Spray head 905 is fixedly installed at the bottom of each of the multiple diversion pipes 904. One end of water outlet pipe 903 extends through to one side of spray tower 10. Water tank 901 is provided at the bottom of water outlet pipe 903. Water inlet pipe is provided inside the tank. Placement slots are provided on both sides of filter box 3. Disassembly assembly 6 is provided inside each of the two placement slots. Disassembly assembly 6 includes: pull plate 602. Connecting shaft 601 is fixedly installed on one side of pull plate 602. Two sets of inclined rods 603 slide against the inside of pull plate 602. The two sets of inclined rods 603 are respectively movably inserted into the inside of primary filter plate 4 and secondary filter plate 5.

[0021] In this embodiment, two sets of pull plates 602 are slidably installed inside the corresponding placement slots. Two sets of limiting rods 604 are slidably installed inside each of the two sets of pull plates 602. Springs 605 are sleeved on the outer side of each of the four sets of limiting rods 604. The two ends of the two sets of springs 605 located on the same side are fixedly connected to the corresponding pull plate 602 and the inner wall of one side of the placement slot, which facilitates the reset of the pull plate 602. The inclined rod 603 is inserted into the interior of the primary filter plate 4 and the secondary filter plate 5, which facilitates the quick installation and removal of the primary filter plate 4 and the secondary filter plate 5. One end of the connecting pipe 1 2, the connecting pipe 2 7 and the straight pipe 13 are all fixedly installed with air pumps. One end of the three sets of air pumps is fixedly connected to the short pipe 1, the short pipe 2 and the short pipe 3, respectively. The bottom of the connecting pipe is fixedly installed with a pump body 902. One end of the pump body 902 is fixedly connected to the water inlet pipe, which facilitates the rapid filtration, purification and discharge of the gas generated by stirring.

[0022] In this embodiment, a stirring shaft 14 is installed inside the mixing tank 1. Multiple sets of connecting rings 15 are fixedly installed on the outside of the stirring shaft 14. Multiple sets of stirring rods 16 are fixedly installed on the outside of each set of connecting rings 15. The stirring shaft 14 is rotatably connected to the top cover. A motor and a feed hopper are fixedly installed on the top of the top cover. The output shaft of the motor is fixedly connected to the stirring shaft 14 to facilitate the mixing of asphalt. Two sets of connecting shafts 601 slide through to both sides of the filter box 3. A pull plate 602 is fixedly installed at one end of each set of connecting shafts 601. A pull ring is fixedly installed on one side of each set of pull plates 602 to facilitate the quick installation and removal of the primary filter plate 4 and the secondary filter plate 5. A condenser pipe 11 is installed inside the cooling box 8. An exhaust pipe is fixedly installed on the top of the spray tower 10. Two sets of activated carbon plates 12 are fixedly installed inside the exhaust pipe. A drain pipe is fixedly installed on the bottom of one side of both the cooling box 8 and the spray tower 10. A discharge port is opened on the top of the mixing tank 1. A door is rotatably installed on one side of the filter box 3 to improve the treatment effect of asphalt exhaust gas.

[0023] In this embodiment, during use, the motor is started, and the motor output shaft drives the stirring shaft 14 to rotate. The connecting ring 15 and stirring rod 16 on the outer side of the stirring shaft 14 rotate accordingly. Driven by the stirring shaft 14, the stirring rod 16 stirs and mixes the asphalt and other materials in the mixing tank 1, making the materials uniformly mixed and completing the asphalt mixing operation. The exhaust gas generated during the mixing process, under the action of the top air pump, enters the short pipe 1 through the connecting pipe 1 2, and then enters the filter box 3. The primary filter plate 4 and the secondary filter plate 5 in the filter box 3 intercept and filter larger particulate impurities, dust, etc. in the exhaust gas. The primary filter plate 4 first performs preliminary filtration of the exhaust gas to remove larger particulate matter, and the secondary filter plate 5 further filters smaller particles to improve the filtration effect and achieve primary purification of the exhaust gas. When it is necessary to clean or replace the primary filter plate 4 and the secondary filter plate 5, the pull ring is pulled, and the pull ring drives the connecting shaft 601 and the pull plate 602 to slide in the placement groove. When the pull plate 602 slides, it overcomes the elastic force of the spring 605, causing the inclined rod 603 to be pulled out from the primary filter plate 4 and the secondary filter plate 5, thus releasing the fixation of the filter plates. At this time, the primary filter plate 4 and the secondary filter plate 5 can be removed from the filter box 3 for maintenance. After maintenance, the filter plates are put back in their original positions, the pull ring is loosened, and under the action of the spring 605, the inclined rod 603 is reinserted into the filter plates, achieving the fixed installation of the filter plates. The exhaust gas after primary filtration enters the short pipe second through the connecting pipe second 7 under the action of the air pump, and then enters the cooling box 8. The condenser pipe 11 in the cooling box 8 cools the exhaust gas and reduces its temperature. When the high-temperature exhaust gas flows around the condenser pipe 11, the heat is absorbed by the condenser pipe 11, causing the exhaust gas temperature to drop, creating suitable conditions for subsequent treatment. The cooled exhaust gas enters the short pipe third through the straight pipe 13 under the action of the air pump, and then enters the spray tower 10. Water in water tank 901, driven by pump 902, flows through inlet pipe to outlet pipe 903. Outlet pipe 903 then distributes the water to multi-component flow pipe 904, finally spraying it downwards through spray head 905 to form a water mist. As the exhaust gas rises within spray tower 10, it comes into full contact with the water mist, which adsorbs harmful gases, fine particles, and other pollutants, achieving purification through spraying. The purified exhaust gas then passes through activated carbon plate 12 in the exhaust pipe at the top of spray tower 10. The activated carbon plate 12 further adsorbs residual odors and harmful impurities in the exhaust gas before finally discharging it through the exhaust pipe. Drain pipes at the bottom of spray tower 10 and cooling tank 8 are used to discharge wastewater generated during the treatment process.

[0024] The above provides a detailed description of the exhaust gas treatment structure for an asphalt mixing device provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A structure for treating exhaust gas from an asphalt mixing plant, characterized in that, include: A mixing tank (1) is provided with a top cover. A connecting pipe (2) is fixedly installed inside the top cover. A short pipe is provided at one end of the connecting pipe (2). A filter box (3) is fixedly installed at the bottom of the short pipe. A primary filter plate (4) and a secondary filter plate (5) are provided inside the filter box (3). A connecting pipe (7) is fixedly installed at the bottom of the filter box (3). A short pipe is provided at one end of the connecting pipe (7). A cooling box (8) is fixedly installed at one end of the cooling box (8). A straight pipe (13) is fixedly installed at one end of the straight pipe (13). A short pipe (3) is provided at one end of the straight pipe (13). A spray tower (10) is fixedly installed at one end of the short pipe (3). A spray assembly (9) is provided inside the spray tower (10). The spray assembly (9) includes: a water outlet pipe (903). The water outlet pipe (903) is fixedly installed... The outlet pipe (903) is fixedly installed inside the spray tower (10). Multiple diversion pipes (904) are fixedly installed on both sides of the outlet pipe (903). Spray heads (905) are fixedly installed at the bottom of each diversion pipe (904). One end of the outlet pipe (903) extends through to one side of the spray tower (10). A water tank (901) is provided at the bottom of the outlet pipe (903). An inlet pipe is provided inside the tank. Placement slots are provided on both sides of the filter box (3). Disassembly components (6) are provided inside the two placement slots. The disassembly components (6) include: a pull plate (602). A connecting shaft (601) is fixedly installed on one side of the pull plate (602). Two sets of inclined rods (603) slide against the inside of the pull plate (602). The two sets of inclined rods (603) are respectively movably inserted into the inside of the primary filter plate (4) and the secondary filter plate (5).

2. The exhaust gas treatment structure for an asphalt mixing device according to claim 1, characterized in that, The two sets of pull plates (602) are slidably installed inside the corresponding placement slots. Two sets of limiting rods (604) are slidably installed inside the two sets of pull plates (602). Springs (605) are sleeved on the outer side of the four sets of limiting rods (604). The two ends of the two sets of springs (605) located on the same side are fixedly connected to the corresponding pull plate (602) and the inner wall of one side of the placement slot, respectively.

3. The exhaust gas treatment structure for an asphalt mixing plant according to claim 1, characterized in that, An air pump is fixedly installed at one end of each of the connecting pipes 1 (2), 2 (7) and 3 (13). One end of each of the three sets of air pumps is fixedly connected to short pipe 1, short pipe 2 and short pipe 3 respectively. A pump body (902) is fixedly installed at the bottom of the connecting pipe. One end of the pump body (902) is fixedly connected to the water inlet pipe.

4. The exhaust gas treatment structure for an asphalt mixing plant according to claim 1, characterized in that, The mixing tank (1) is equipped with a stirring shaft (14) inside. Multiple sets of connecting rings (15) are fixedly installed on the outside of the stirring shaft (14). Multiple sets of stirring rods (16) are fixedly installed on the outside of the multiple sets of connecting rings (15). The stirring shaft (14) is rotatably connected to the top cover. A motor and a feed hopper are fixedly installed on the top of the top cover. The output shaft of the motor is fixedly connected to the stirring shaft (14).

5. The exhaust gas treatment structure for an asphalt mixing device according to claim 1, characterized in that, The two sets of connecting shafts (601) slide through to both sides of the filter box (3), and a pull plate (602) is fixedly installed at one end of each of the two sets of connecting shafts (601), and a pull ring is fixedly installed on one side of each of the two sets of pull plates (602).

6. The exhaust gas treatment structure for an asphalt mixing device according to claim 1, characterized in that, The cooling box (8) is equipped with a condenser pipe (11) inside. The top of the spray tower (10) is fixedly installed with an exhaust pipe. Two sets of activated carbon plates (12) are fixedly installed inside the exhaust pipe. Drain pipes are fixedly installed on the bottom of one side of both the cooling box (8) and the spray tower (10). The top of the mixing tank (1) is provided with a discharge port. The filter box (3) is rotatably installed with a door on one side.

Images