An explosion-proof nitrogen fertilizer granulation tail gas recovery tower

Abstract

This utility model relates to the field of nitrogen fertilizer granulation tail gas recovery technology. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower includes a tower body and a nitrogen fertilizer granulation tail gas inlet pipe connected to the left side of the tower body. It also includes a water tank fixed to the top left side of the nitrogen fertilizer granulation tail gas inlet pipe. A water pump is installed at the top of the nitrogen fertilizer granulation tail gas inlet pipe and to the left of the water tank, and the water pump is connected to the water tank. This utility model significantly reduces the dust concentration in the tail gas through dual dust filtration, avoiding the risk of explosion caused by excessive dust concentration. Large dust particles are intercepted and small particles are moistened by water mist spraying, and residual dust is further captured by a filter screen, ensuring that the dust concentration in the tail gas is far below the lower explosive limit, eliminating the conditions for explosion at the source. Water mist spraying increases air humidity, reduces static electricity generated by friction between dust and pipes, reduces the risk of static sparks, and effectively improves the safety of the recovery tower.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen fertilizer granulation tail gas recovery technology, specifically an explosion-proof nitrogen fertilizer granulation tail gas recovery tower. Background Technology

[0002] During the granulation process of nitrogen fertilizer, a large amount of exhaust gas is emitted when the high-temperature molten material is formed into granules through the nozzle. The exhaust gas usually contains dust particles, ammonia, water vapor, and other volatile organic compounds. The exhaust gas recovery tower can effectively remove these harmful gases through physical absorption, chemical absorption, or adsorption, thereby reducing their pollution to the atmospheric environment and decreasing the probability of environmental problems such as acid rain and photochemical smog. The exhaust gas also contains a large amount of dust. If this dust is emitted directly, it will increase the concentration of particulate matter in the atmosphere, affect air quality, and may even damage the surrounding soil and vegetation.

[0003] If the nitrogen fertilizer granulation tail gas recovery tower does not reduce the dust concentration entering the tail gas during the recovery process, the dust concentration inside the tower may be high, which could easily create an explosive environment inside the tower or pipeline. Furthermore, nitrogen fertilizer dust itself is flammable or explosive, posing certain safety hazards during the recovery process. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, this utility model proposes an explosion-proof nitrogen fertilizer granulation tail gas recovery tower to solve the problems mentioned in the background technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An explosion-proof nitrogen fertilizer granulation tail gas recovery tower includes a recovery tower body and a nitrogen fertilizer granulation tail gas inlet pipe connected to the left side of the recovery tower body, and further includes:

[0007] A water tank is fixed to the top left side of the nitrogen fertilizer granulation tail gas inlet pipe. A water pump is installed at the top of the nitrogen fertilizer granulation tail gas inlet pipe and on the left side of the water tank. The water pump is connected to the water tank. A water pipe is connected to the left side of the water tank. One end of the water pipe passes through the inside of the nitrogen fertilizer granulation tail gas inlet pipe and is connected to a spray box. A waste liquid box is installed through the bottom left side of the nitrogen fertilizer granulation tail gas inlet pipe. Positioning structures are provided on both the front and rear sides of the waste liquid box.

[0008] A box body is fixed to the top right side of the nitrogen fertilizer granulation exhaust gas inlet pipe. Lifting plates are provided on both the left and right sides inside the box body, and filter screen bodies are embedded on the surface of the lifting plates. Fixing grooves are opened on the top surface of the nitrogen fertilizer granulation exhaust gas inlet pipe and on both the left and right sides inside the box body. The lifting plates pass through the fixing grooves and are slidably connected to the inner wall of the fixing grooves. A switching structure is provided between the lifting plates. A sealing door is opened on the left side surface of the box body.

[0009] Preferably, the positioning structure includes a fixing plate, a threaded rod, a knob, and a positioning hole. The fixing plate is fixed on the front and rear sides of the bottom of the nitrogen fertilizer granulation tail gas inlet pipe. The threaded rod is disposed through one side of the fixing plate and is threadedly connected to the fixing plate. The knob is fixed to one end of the threaded rod. The positioning hole is opened above the front and rear sides of the waste liquid box, and the threaded rod is slidably connected to the inner wall of the positioning hole.

[0010] Preferably, a guide plate is fixed at the bottom of the inner wall of the nitrogen fertilizer granulation exhaust gas inlet pipe and on the left side of the waste liquid box, and the surface above the guide plate is inclined.

[0011] Preferably, a water level sensor is fixed on the upper left side of the waste liquid box, and the sensor head of the water level sensor extends into the interior of the waste liquid box. A warning light is fixed on the lower front side of the waste liquid box, and the water level sensor and the warning light are connected by wires.

[0012] Preferably, the repositioning structure includes a motor, gears, a connecting rod, and a rack plate. The motor is fixed to the lower part of the back of the housing. The gears are rotatably connected to the lower parts of the front and rear sides of the inner wall of the housing. The output shaft of the motor passes through the interior of the housing and is fixedly connected to the gear on the rear side. The connecting rod is fixed between the gears on the front and rear sides. The rack plate is fixed to the front and rear of the opposite side surface of the lifting plate. The gears and the rack plate mesh with each other. The rack plate is slidably connected to the inner wall of the fixing groove.

[0013] Preferably, limit grooves are provided on the left and right sides of the front and rear sides of the inner wall of the box, and limit blocks are fixed on the upper sides of the front and rear sides of the lifting plate, and the limit blocks are located inside the limit grooves and are slidably connected to the inner wall of the limit grooves.

[0014] Preferably, a positioning plate is fixed to the bottom of the lifting plate, and positioning grooves are provided on both sides of the bottom of the inner wall of the nitrogen fertilizer granulation tail gas inlet pipe and below the lifting plate, and the positioning plate is engaged with the inner wall of the positioning groove.

[0015] Compared with existing technologies, the beneficial effects of this explosion-proof nitrogen fertilizer granulation tail gas recovery tower are:

[0016] First, this utility model significantly reduces the dust concentration in exhaust gas through dual dust filtration, avoiding the risk of explosion caused by excessive dust concentration. It intercepts large dust particles and wets small particles by spraying water mist, and then further captures residual dust through a filter screen, so that the dust concentration in exhaust gas is far below the lower explosive limit.

[0017] Secondly, this invention eliminates the conditions for explosion at the source. Water mist spraying can increase air humidity, reduce static electricity generated by dust and pipe friction, reduce the risk of static sparks, and effectively improve the safety of the recovery tower. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional schematic diagram of the nitrogen fertilizer granulation tail gas inlet pipe in this utility model;

[0020] Figure 3 This is a cross-sectional view of the nitrogen fertilizer granulation tail gas inlet pipe in this utility model;

[0021] Figure 4 This is a cross-sectional view of the box body in this utility model;

[0022] Figure 5 This is a three-dimensional schematic diagram of the waste liquid box in this utility model.

[0023] The components include: 1. Recovery tower body; 2. Nitrogen fertilizer granulation tail gas inlet pipe; 3. Water tank; 4. Water pump; 5. Water pipe; 6. Spray box; 7. Waste liquid box; 8. Positioning structure; 81. Fixing plate; 82. Threaded rod; 83. Knob; 84. Positioning hole; 9. Box body; 10. Lifting plate; 11. Filter screen body; 12. Fixing groove; 13. Repositioning structure; 131. Motor; 132. Gear; 133. Connecting rod; 134. Rack plate; 14. Sealing door; 15. Limiting groove; 16. Limiting block; 17. Guide plate; 18. Positioning plate; 19. Positioning groove; 20. Water level sensor; 21. Warning light. Detailed Implementation

[0024] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0025] This specific embodiment of an explosion-proof nitrogen fertilizer granulation tail gas recovery tower includes a recovery tower body 1. A nitrogen fertilizer granulation tail gas inlet pipe 2 is connected to the left side of the recovery tower body 1. A water tank 3 is fixed to the left side of the top of the nitrogen fertilizer granulation tail gas inlet pipe 2. A water pump 4 is installed at the top of the nitrogen fertilizer granulation tail gas inlet pipe 2 and to the left of the water tank 3, and the water pump 4 is connected to the water tank 3. A water pipe 5 is connected to the left side of the water tank 3, and one end of the water pipe 5 extends into the interior of the nitrogen fertilizer granulation tail gas inlet pipe 2 and is connected to a spray box 6. The bottom of the spray box 6 has multiple spray holes, which can spray water mist into the interior of the nitrogen fertilizer granulation tail gas inlet pipe 2. A waste liquid box 7 is installed through the left side of the bottom of the nitrogen fertilizer granulation tail gas inlet pipe 2. Positioning structures 8 are provided on both the front and rear sides of the waste liquid box 7. A box body 9 is fixed on the right side of the top of the nitrogen fertilizer granulation tail gas inlet pipe 2. Lifting plates 10 are provided on both the left and right sides inside the box body 9. A filter screen body 11 is embedded on the surface of the lifting plate 10. Fixing grooves 12 are opened on the top surface of the nitrogen fertilizer granulation tail gas inlet pipe 2 and on both the left and right sides inside the box body 9. The lifting plate 10 passes through the fixing groove 12 and is slidably connected to the inner wall of the fixing groove 12. A switching structure 13 is provided between the lifting plates 10. A sealing door 14 is opened on the left side of the box body 9.

[0026] The positioning structure 8 includes a fixing plate 81, a threaded rod 82, a knob 83, and a positioning hole 84. The fixing plate 81 is fixed to the front and rear sides of the bottom of the nitrogen fertilizer granulation tail gas inlet pipe 2. The threaded rod 82 is inserted through one side of the fixing plate 81 and is threadedly connected to the fixing plate 81. The knob 83 is fixed to one end of the threaded rod 82. The positioning hole 84 is opened above the front and rear sides of the waste liquid box 7, and the threaded rod 82 is slidably connected to the inner wall of the positioning hole 84. When the threaded rod 82 is inserted into the surface of the waste liquid box 7... After the positioning hole 84 is inserted into the container, the threaded rod 82 can be used to support the waste liquid box 7 so that the waste liquid box 7 can collect the waste liquid generated by the dust removal of nitrogen fertilizer granulation tail gas. After a certain amount of waste liquid is collected, the operator can rotate the knobs 83 on the front and back sides, which will cause the threaded rod 82 to move and move out of the positioning hole 84. The operator can then pull the waste liquid box 7 out from under the nitrogen fertilizer granulation tail gas inlet pipe 2 to treat the waste liquid inside the waste liquid box 7.

[0027] A guide plate 17 is fixed at the bottom of the inner wall of the nitrogen fertilizer granulation tail gas inlet pipe 2 and on the left side of the waste liquid box 7. The surface above the guide plate 17 is inclined. When the spray box 6 sprays water mist and comes into contact with the nitrogen fertilizer granulation tail gas, the generated waste liquid will flow on the surface of the guide plate 17. The guide plate 17 can guide the waste liquid and allow it to enter the interior of the waste liquid box 7, thus preventing the waste liquid from accumulating inside the nitrogen fertilizer granulation tail gas inlet pipe 2.

[0028] A water level sensor 20 is fixed on the upper left side of the waste liquid box 7, and the sensor head of the water level sensor 20 extends into the interior of the waste liquid box 7. A warning light 21 is fixed on the lower front side of the waste liquid box 7, and the water level sensor 20 and the warning light 21 are connected by wires. When the waste liquid inside the waste liquid box 7 reaches the appropriate water level, the water level sensor 20 will be detected and the warning light 21 will be turned on to remind the surrounding staff to treat the waste liquid inside the waste liquid box 7.

[0029] The shifting structure 13 includes a motor 131, a gear 132, a connecting rod 133, and a rack plate 134. The motor 131 is fixed to the lower back of the housing 9. The gear 132 is rotatably connected to the lower front and rear sides of the inner wall of the housing 9, and the output shaft of the motor 131 passes through the interior of the housing 9 and is fixedly connected to the rear gear 132. The connecting rod 133 is fixed between the front and rear gears 132. The rack plate 134 is fixed to the front and rear sides of the opposing surface of the lifting plate 10, and the gear 132 meshes with the rack plate 134. The rack plate 134 is slidably connected to the inner wall of the fixing groove 12. Limit grooves 15 are provided on the left and right sides of the front and rear sides of the inner wall of the housing 9. Limiting blocks 16 are fixed on the upper part of both the front and rear sides of the plate 10. The limiting blocks 16 are located inside the limiting groove 15 and are slidably connected to the inner wall of the limiting groove 15. When the surface of the filter body 11 on the left side is clogged with dust, the operator can turn on the motor 131, which will cause the output shaft of the motor 131 to drive the gear 132 on the rear side to rotate. Through the connecting rod 133, the gears 132 on the front and rear sides will rotate synchronously, the lifting plate 10 on the left side will move up, and the lifting plate 10 on the right side will move down, thereby switching the position of the filter body 11 on both sides so that the operator can open the sealing door 14 and clean the surface of the filter body 11 after it has risen.

[0030] A positioning plate 18 is fixed to the bottom of the lifting plate 10. Positioning grooves 19 are provided on both sides of the bottom of the inner wall of the nitrogen fertilizer granulation exhaust gas inlet pipe 2 and below the lifting plate 10. The positioning plate 18 is engaged with the inner wall of the positioning groove 19. When the lifting plate 10 is lowered, the positioning plate 18 below will be inserted into the corresponding positioning groove 19, thereby positioning the entire lifting plate 10 so that the filter body 11 can stably filter dust from the nitrogen fertilizer granulation exhaust gas.

[0031] Its working principle is as follows:

[0032] When workers need to recover nitrogen fertilizer granulation tail gas, the tail gas enters the recovery tower body 1 through the nitrogen fertilizer granulation tail gas inlet pipe 2. At this time, the workers turn on the water pump 4, which allows water from the water tank 3 to enter the water pipe 5 and be sprayed out through the spray box 6. At this time, the dust in the nitrogen fertilizer granulation tail gas comes into contact with the water mist and falls off. The resulting waste liquid flows into the surface of the lower guide plate 17 and eventually into the waste liquid box 7. The nitrogen fertilizer granulation tail gas continues to flow to the right. After the nitrogen fertilizer granulation tail gas comes into contact with the filter body 11 on the surface of the lifting plate 10, the dust in the nitrogen fertilizer granulation tail gas is filtered again through the filter body 11, thereby significantly reducing the dust inside the nitrogen fertilizer granulation tail gas. The final nitrogen fertilizer granulation tail gas enters the interior of the recovery tower body 1 for recycling and treatment to achieve explosion prevention. When the filter body 11 on the surface of the left lifting plate 10 becomes clogged, the staff turns on the motor 131 and controls the rotation direction of the output shaft of the motor 131, thereby causing the left lifting plate 10 to rise and the right lifting plate 10 to fall, switching the positions of the filter bodies 11 on both sides. The filter body 11 after the position is changed can immediately filter the dust from the nitrogen fertilizer granulation tail gas. During the filtration process, the staff can open the sealing door 14 to clean the surface of the filter body 11 inside the box 9 for subsequent replacement.

[0033] It should be noted that, although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof nitrogen fertilizer granulation tail gas recovery tower, characterized in that, Including the main body of the recovery tower (1) and the nitrogen fertilizer granulation tail gas inlet pipe (2) connected to the left side of the main body of the recovery tower (1), and also including: A water tank (3) is fixed on the top left side of the nitrogen fertilizer granulation tail gas inlet pipe (2). A water pump (4) is installed on the top of the nitrogen fertilizer granulation tail gas inlet pipe (2) and on the left side of the water tank (3). The water pump (4) is connected to the water tank (3). A water pipe (5) is connected to the left side of the water tank (3). One end of the water pipe (5) passes through the inside of the nitrogen fertilizer granulation tail gas inlet pipe (2) and is connected to a spray box (6). A waste liquid box (7) is installed through the left side of the bottom of the nitrogen fertilizer granulation tail gas inlet pipe (2). Positioning structures (8) are provided on both the front and rear sides of the waste liquid box (7). A box (9) is fixed on the top right side of the nitrogen fertilizer granulation tail gas inlet pipe (2). Lifting plates (10) are provided on both the left and right sides inside the box (9). A filter screen body (11) is embedded on the surface of the lifting plate (10). Fixing grooves (12) are provided on the top surface of the nitrogen fertilizer granulation tail gas inlet pipe (2) and on both the left and right sides inside the box (9). The lifting plate (10) passes through the fixing groove (12) and is slidably connected to the inner wall of the fixing groove (12). A switching structure (13) is provided between the lifting plates (10). A sealing door (14) is provided on the left side surface of the box (9).

2. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower according to claim 1, characterized in that: The positioning structure (8) includes a fixing plate (81), a threaded rod (82), a knob (83), and a positioning hole (84). The fixing plate (81) is fixed on the front and rear sides of the bottom of the nitrogen fertilizer granulation tail gas inlet pipe (2). The threaded rod (82) is inserted through one side of the fixing plate (81) and is threadedly connected to the fixing plate (81). The knob (83) is fixed at one end of the threaded rod (82). The positioning hole (84) is opened above the front and rear sides of the waste liquid box (7) and the threaded rod (82) is slidably connected to the inner wall of the positioning hole (84).

3. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower according to claim 1, characterized in that: A guide plate (17) is fixed at the bottom of the inner wall of the nitrogen fertilizer granulation tail gas inlet pipe (2) and on the left side of the waste liquid box (7), and the surface above the guide plate (17) is inclined.

4. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower according to claim 1, characterized in that: A water level sensor (20) is fixed on the upper left side of the waste liquid box (7), and the sensing head of the water level sensor (20) extends into the interior of the waste liquid box (7). A warning light (21) is fixed on the lower front side of the waste liquid box (7), and the water level sensor (20) and the warning light (21) are connected by wires.

5. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower according to claim 1, characterized in that: The switching structure (13) includes a motor (131), a gear (132), a connecting rod (133), and a rack plate (134). The motor (131) is fixed to the lower back of the housing (9). The gear (132) is rotatably connected to the lower front and rear sides of the inner wall of the housing (9). The output shaft of the motor (131) passes through the interior of the housing (9) and is fixedly connected to the gear (132) on the rear side. The connecting rod (133) is fixed between the gears (132) on the front and rear sides. The rack plate (134) is fixed to the front and rear sides of the opposite side surface of the lifting plate (10). The gear (132) meshes with the rack plate (134). The rack plate (134) is slidably connected to the inner wall of the fixing groove (12).

6. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower according to claim 1, characterized in that: Limiting grooves (15) are provided on the left and right sides of the front and rear sides of the inner wall of the box (9). Limiting blocks (16) are fixed on the upper sides of the front and rear sides of the lifting plate (10). The limiting blocks (16) are located inside the limiting grooves (15) and are slidably connected to the inner wall of the limiting grooves (15).

7. The explosion-proof nitrogen fertilizer granulation tail gas recovery tower according to claim 1, characterized in that: The bottom of the lifting plate (10) is fixed with a positioning plate (18). The bottom sides of the inner wall of the nitrogen fertilizer granulation tail gas inlet pipe (2) and below the lifting plate (10) are provided with positioning grooves (19). The positioning plate (18) is engaged with the inner wall of the positioning groove (19).

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