A waste gas treatment device for fertilizer production

Abstract

The utility model relates to waste gas treatment equipment technical field discloses a kind of waste gas treatment devices for fertilizer production, including spray tower, spraying assembly and replacement mechanism, the spray tower side wall is equipped with air inlet, outside wall installs spraying assembly, the spray tower top air outlet fixed mounting replacement mechanism, mechanism includes outer ring, sliding slot and limiting post, the outer ring is fixed in air outlet, the sliding slot is slidably connected limiting post, the limiting post is connected with handle and pull plate, and by spring abuts on sliding slot inner wall, the outer ring inner ring installs filter screen, the filter screen side wall is equipped with the locking groove for the limiting post is clamped under the action of spring force Locking groove. The utility model realizes the tool-free quick disassembly of filter screen by replacement mechanism, solves the problem that fertilizer dust is prone to cause filter screen blockage and disassembly is cumbersome, while flow guide mechanism optimizes airflow distribution, reduces wall flow phenomenon, significantly improves gas-liquid contact efficiency and waste gas purification effect.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to a waste gas treatment device for fertilizer production. Background Technology

[0002] In the industrial production of modern agricultural fertilizers, processes such as granulation, drying, and cooling inevitably generate a large amount of industrial waste gas. This waste gas has a complex composition and usually contains high concentrations of dust particles as well as harmful chemical components such as ammonia and fluorides. In order to meet environmental emission standards, waste gas treatment devices must be used to purify these gases. The most commonly used equipment at present is the spray tower, which washes the dust and neutralizes the harmful gases by countercurrent contact between liquid and gas.

[0003] However, in actual production applications, existing spray tower equipment has revealed some obvious structural defects. Because fertilizer exhaust gas contains a large amount of sticky dust and easily crystallizing substances, in order to prevent these particles from being directly discharged into the atmosphere, it is usually necessary to install a filter screen at the top of the tower for interception. However, existing filter screens are mostly rigidly connected to the tower body flange with bolts. During long-term operation, the bolts are easily corroded by exhaust gas and rust and seize up. Moreover, fertilizer dust is very easy to clog the filter screen, resulting in the need for high-frequency disassembly and cleaning. The traditional bolt fixing method makes the disassembly and assembly process extremely cumbersome and time-consuming, which not only increases the labor intensity of workers, but also often leads to the filter screen not being cleaned in time due to maintenance difficulties, thereby increasing exhaust resistance and affecting the normal operation of the entire production line.

[0004] In addition, the airflow inside traditional spray towers often rises in a laminar state, with a high flow velocity at the center and a slow flow velocity at the edges. This results in a short contact time between the gas and the spray liquid, insufficient mixing, and a tendency for the liquid to flow directly down the tower wall, further reducing the purification efficiency of the exhaust gas.

[0005] Therefore, this utility model proposes a waste gas treatment device for fertilizer production to solve the shortcomings of the prior art, such as the difficulty in disassembling and maintaining the filter screen and the low gas-liquid contact efficiency in the tower. Utility Model Content

[0006] In view of the problems in the existing technology of exhaust gas treatment devices for fertilizer production, the filter screen is usually fixed with bolts, which is prone to rust and jamming in the high dust and corrosive environment of fertilizer production, resulting in cumbersome disassembly and cleaning, low maintenance efficiency, and uneven airflow distribution in the tower, which can easily generate wall flow and lead to unsatisfactory purification effect. The present invention aims to provide an exhaust gas treatment device for fertilizer production with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a waste gas treatment device for fertilizer production, including: a spray tower, an air inlet on the side wall of the spray tower, a spray assembly fixedly installed on the outer side wall of the spray tower, and a replacement mechanism fixedly installed at the air outlet at the top of the spray tower.

[0008] The replacement mechanism includes an outer ring fixedly connected to the outer periphery of the air outlet. The inner sidewall of the outer ring is provided with a radially extending groove. A limiting post is slidably connected inside the groove. A handle is fixedly connected to one end of the limiting post extending to the outside of the outer ring. A pull plate is fixedly connected to the outer surface of the limiting post located inside the groove.

[0009] Furthermore, a spring is fitted on the outer circumference of the limiting post, with both ends of the spring abutting against the pull plate and the inner wall of the slide groove, respectively. A filter screen is fitted on the inner ring of the outer ring, and a locking groove is provided on the outer wall of the filter screen for the limiting post to be inserted. The replacement mechanism achieves quick disassembly and self-locking fixation between the filter screen and the outer ring through the sliding of the limiting post in the slide groove and the elastic abutment of the spring.

[0010] Preferably, the spray tower is equipped with a flow guiding mechanism, which includes a support frame fixedly connected to the inner wall of the spray tower, a connecting plate fixedly connected to the inner side of the support frame, a connecting shaft fixedly connected to the end of the connecting plate away from the support frame, a fan rotatably connected to the bottom end of the connecting shaft through a bearing, and a flow guiding cone fixedly connected to the top of the support frame.

[0011] Preferably, the spray assembly includes a water tank fixedly installed on the outer wall of the spray tower, a water pump fixedly installed on the top of the water tank, a water pipe connected to the output end of the water pump, and the end of the water pipe away from the water pump passing through the side wall of the spray tower and extending into the interior of the spray tower.

[0012] Preferably, there are multiple connecting plates, which are evenly spaced along the circumference of the connecting axis, and the fan is located above the air inlet.

[0013] Preferably, the guide cone has a conical structure, with the tip of the guide cone pointing vertically upward toward the air outlet, and the diameter of the bottom surface of the guide cone is smaller than the inner diameter of the support frame.

[0014] Preferably, the grip surface is provided with anti-slip texture, and the inner diameter of the outer ring is adapted to the diameter of the air outlet.

[0015] Preferably, the filter screen includes a rigid outer frame and an adsorption filter material filled inside the rigid outer frame, and the locking groove is formed on the side of the rigid outer frame.

[0016] Preferably, a sealing gasket is provided at the connection between the outer ring and the spray tower, and a rubber damping layer is provided at the mating point between the limiting post and the locking groove.

[0017] Preferably, one end of the water pipe inside the spray tower is connected to an atomizing nozzle, and the atomizing nozzle is located above the flow guiding mechanism.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting a replacement mechanism with a spring self-locking function at the air outlet at the top of the spray tower, utilizes the sliding cooperation of the limiting column in the slide groove and the rebound force of the spring to realize tool-free quick disassembly and assembly of the filter screen. This solves the problem that the filter screen of the exhaust gas treatment device is usually fixed with bolts, which is prone to corrosion in the high dust environment of fertilizer production, and is cumbersome to disassemble and has low maintenance efficiency. It achieves the technical effect of reducing the labor intensity of workers, shortening the equipment maintenance downtime, and ensuring that the filter screen can be cleaned and replaced in a timely manner.

[0020] 2. This utility model solves the problems of uneven airflow distribution, "fast in the middle and slow around the edges" short-circuiting phenomenon, and wall flow problems of liquid loss along the tower wall by setting an airflow guiding mechanism driven by airflow inside the spray tower. It also uses the impact force of rising exhaust gas to drive the fan to rotate and generate turbulence. In conjunction with the top guide cone, the central airflow is guided to diffuse towards the tower wall. This achieves the technical effect of increasing the gas-liquid contact area and mixing intensity, allowing exhaust gas to fully collide and react with spray droplets, thereby significantly improving the exhaust gas purification efficiency.

[0021] 3. This utility model extends the water pipe of the spray assembly into the tower and is equipped with an atomizing nozzle. The nozzle is positioned above the flow guiding mechanism, ensuring that the spray liquid can cover the entire airflow area disturbed by the flow guiding mechanism from top to bottom. This solves the dead zone problem of traditional spraying methods and achieves a comprehensive and deep purification effect without dead zones. It is especially suitable for treating complex waste gas containing dust and acidic or alkaline gases in fertilizer production. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a waste gas treatment device for fertilizer production proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the limiting column structure of a waste gas treatment device for fertilizer production proposed in this utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0026] Legend:

[0027] 1. Spray tower;

[0028] 2. Sprinkler assembly; 21. Water pump; 22. Water tank; 23. Water pipe;

[0029] 3. Air inlet;

[0030] 4. Replacement mechanism; 41. Outer ring; 42. Slide groove; 43. Limiting post; 44. Handle; 45. Pull plate; 46. Spring; 47. Filter screen;

[0031] 5. Flow guiding mechanism; 51. Connecting shaft; 52. Connecting plate; 53. Support frame; 54. Fan; 55. Flow guiding cone. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example:

[0034] Reference Figures 1 to 4 This utility model provides a waste gas treatment device for fertilizer production, which aims to solve the structural defects of existing fertilizer waste gas treatment equipment, such as cumbersome filter replacement and low gas-liquid contact efficiency in the tower, resulting in poor purification effect.

[0035] like Figure 1 and Figure 2 As shown, a waste gas treatment device for fertilizer production includes a spray tower 1 and a spray assembly 2 fixedly installed on the outer wall of the spray tower 1. The spray tower 1 serves as the main reaction vessel for waste gas treatment, with an air inlet 3 opened at the lower part of its side wall for introducing industrial waste gas to be treated. The spray assembly 2 is used to continuously supply washing liquid into the spray tower 1 to spray and purify the waste gas. The spray assembly 2 includes a water tank 22 fixedly installed on the outer wall of the spray tower 1, which is used to store the waste gas required for purification. Water or chemical solution is used. A water pump 21 is fixedly installed on the top of the water tank 22. The output end of the water pump 21 is connected to a water pipe 23. The end of the water pipe 23 away from the water pump 21 passes through the side wall of the spray tower 1 and extends to the upper part of the spray tower 1. The end of the water pipe 23 inside the spray tower 1 is connected to an atomizing nozzle, which is used to atomize the liquid drawn by the water pump 21 and spray it evenly in the space inside the tower. The air inlet 3 is located below the water outlet end of the water pipe 23 to ensure that the rising exhaust gas can fully countercurrent contact with the falling liquid droplets.

[0036] Reference Figure 2 , Figure 3 and Figure 4 The replacement mechanism 4 includes an outer ring 41 fixedly connected to the outer periphery of the air outlet. The inner diameter of the outer ring 41 is adapted to the diameter of the air outlet. A sealing gasket is provided at the connection between the outer ring 41 and the spray tower 1 to prevent exhaust gas leakage. A radially extending slide groove 42 is opened on the inner side wall of the outer ring 41. A limiting post 43 is slidably connected inside the slide groove 42. A handle 44 is fixedly connected to one end of the limiting post 43 extending to the outside of the outer ring 41. The surface of the handle 44 is provided with anti-slip texture to increase friction and facilitate manual pulling. The limiting post 43 is located inside the slide groove 42. A pull plate 45 is fixedly connected to the surface. At the same time, a spring 46 is sleeved on the outer circumference of the limiting post 43. One end of the spring 46 abuts against the side of the pull plate 45 facing the center, and the other end of the spring 46 abuts against the inner wall of the slide groove 42. A filter screen 47 is installed in the inner ring of the outer ring 41. The filter screen 47 includes a rigid outer frame and an adsorption filter material filled inside the rigid outer frame. A locking groove is opened on the outer wall of the rigid outer frame for the limiting post 43 to be inserted. A rubber damping layer is provided at the mating point between the limiting post 43 and the locking groove to enhance the tightness of the connection.

[0037] When the filter screen 47 needs to be installed or replaced, the operator pulls the handle 44 to move the limiting post 43 outward along the slide groove 42. The pulling plate 45 then compresses the spring 46. After the filter screen 47 is placed in, the handle 44 is released. The limiting post 43 automatically resets under the rebound force of the spring 46 and is locked into the locking groove, thereby achieving quick fixing and locking of the filter screen 47.

[0038] The spray tower 1 is equipped with a flow guiding mechanism 5. The flow guiding mechanism 5 includes a support frame 53 fixedly connected to the inner wall of the spray tower 1. A connecting plate 52 is fixedly connected to the inner side of the support frame 53. There are at least three connecting plates 52, which are evenly distributed around the connecting shaft 51. The end of the connecting plates 52 away from the support frame 53 is fixedly connected to a vertically set connecting shaft 51. The bottom end of the connecting shaft 51 is rotatably connected to a fan 54 through a bearing. The fan 54 is located above the air inlet 3 and the blades of the fan 54 are set with an inclined air guiding angle. A flow guiding cone 55 is fixedly connected to the top of the support frame 53. The flow guiding cone 55 has a conical structure and the tip is vertically upward pointing to the air outlet. The bottom diameter of the flow guiding cone 55 is smaller than the inner diameter of the support frame 53. The fan 54 is driven to rotate by the impact force generated by the gas flow, thereby generating turbulence. The flow guiding cone 55 guides the central airflow to the surrounding tower walls.

[0039] The water tank 22 of the spray assembly 2 is fixedly installed on the outer wall of the spray tower 1. The water pump 21 is fixedly installed on the top of the water tank 22. The output end of the water pump 21 is connected to the water pipe 23. The end of the water pipe 23 away from the water pump 21 passes through the side wall of the spray tower 1 and extends to the spray area inside the spray tower 1. The end of the water pipe 23 inside the spray tower 1 is connected to an atomizing nozzle. The atomizing nozzle is located above the flow guiding mechanism 5, so that the sprayed atomized droplets can fully contact the rising airflow from top to bottom. A sealing gasket is provided at the connection between the outer ring 41 and the air outlet of the spray tower 1 to prevent untreated exhaust gas from overflowing. A rubber damping layer is provided at the mating point between the limiting post 43 and the locking groove to eliminate mechanical gaps and prevent vibration and loosening. The outer surface of the handle 44 is provided with anti-slip texture to increase friction during operation.

[0040] The implementation principle of this application embodiment is as follows: When the waste gas generated during the fertilizer production process enters the spray tower 1 through the air inlet 3, the water pump 21 is started to mobilize the liquid stored in the water tank 22. The liquid is transported to the tower through the water pipe 23 installed on the outside of the spray tower 1 and sprayed downward through the atomizing nozzle. During the process of the waste gas flowing from bottom to top, the airflow impact force acts on the fan 54, causing it to rotate at high speed on the connecting shaft 51. The rotating fan 54 generates a strong disturbance effect on the airflow. At the same time, the guide cone 55 fixed on the top of the support frame 53 guides the airflow to diffuse towards the tower wall, so that the airflow and the droplets falling from the upper spray layer fully collide and mix near the tower wall and in the tower space. The turbulence effect driven by the rotating airflow reduces the wall flow phenomenon of liquid directly flowing along the tower wall, thereby significantly improving the waste gas purification efficiency.

[0041] When the filter screen 47 needs to be cleaned or replaced, the operator holds the handle 44 and pulls it outward, causing the limiting post 43 to slide outward inside the slide groove 42. The pulling plate 45 on the limiting post 43 then compresses the spring 46. At this time, the filter screen 47 to be installed is placed into the inner ring of the outer ring 41. Then, the handle 44 is released, and the limiting post 43 quickly resets under the rebound force of the spring 46 and is locked into the locking groove reserved on the outer side of the filter screen 47. The filter screen 47 is automatically locked and fixed by the continuous pressing force of the spring 46. The whole process does not require the use of bolts or tools, which greatly improves the convenience of maintenance.

Claims

1. A waste gas treatment device for fertilizer production, comprising: A spray tower (1) has an air inlet (3) on its side wall and a spray assembly (2) is fixedly installed on the outer side wall of the spray tower (1). Its features are, A replacement mechanism (4) is fixedly installed at the air outlet at the top of the spray tower (1). The replacement mechanism (4) includes an outer ring (41) fixedly connected to the outer periphery of the air outlet. A sliding groove (42) is provided on the inner side wall of the outer ring (41). A limiting post (43) is slidably connected inside the slide groove (42). A handle (44) is fixedly connected to one end of the limiting post (43) extending to the outside of the outer ring (41). A pull plate (45) is fixedly connected to the outer surface of the limiting post (43) inside the slide groove (42). A spring (46) is sleeved on the outer circumference of the limiting post (43). The two ends of the spring (46) abut against the pull plate (45) and the inner wall of the slide groove (42) respectively. A filter screen (47) is installed in the inner ring of the outer ring (41). A locking groove is opened on the outer side wall of the filter screen (47) for the limiting post (43) to be inserted.

2. The waste gas treatment device for fertilizer production according to claim 1, characterized in that, The spray tower (1) is equipped with a flow guiding mechanism (5). The flow guiding mechanism (5) includes a support frame (53) fixedly connected to the inner wall of the spray tower (1). A connecting plate (52) is fixedly connected to the inner side of the support frame (53). A connecting shaft (51) is fixedly connected to the end of the connecting plate (52) away from the support frame (53). A fan (54) is rotatably connected to the bottom end of the connecting shaft (51) through a bearing. A flow guiding cone (55) is fixedly connected to the top of the support frame (53).

3. The waste gas treatment device for fertilizer production according to claim 2, characterized in that, The spray assembly (2) includes a water tank (22) fixedly installed on the outer wall of the spray tower (1). A water pump (21) is fixedly installed on the top of the water tank (22). The output end of the water pump (21) is connected to a water pipe (23). One end of the water pipe (23) away from the water pump (21) passes through the side wall of the spray tower (1) and extends into the interior of the spray tower (1).

4. The waste gas treatment device for fertilizer production according to claim 2, characterized in that, The connecting plate (52) is provided in multiple ways, and the multiple connecting plates (52) are evenly spaced along the circumference of the connecting shaft (51). The fan (54) is located above the air inlet (3).

5. The waste gas treatment device for fertilizer production according to claim 2, characterized in that, The guide cone (55) has a conical structure, with the tip of the guide cone (55) pointing vertically upward toward the air outlet, and the bottom diameter of the guide cone (55) is smaller than the inner diameter of the support frame (53).

6. The waste gas treatment device for fertilizer production according to claim 1, characterized in that, The grip (44) has an anti-slip texture on its surface, and the inner diameter of the outer ring (41) is adapted to the diameter of the air outlet.

7. The waste gas treatment device for fertilizer production according to claim 1, characterized in that, The filter screen (47) includes a rigid outer frame and an adsorption filter material filled inside the rigid outer frame, and the locking groove is formed on the side of the rigid outer frame.

8. The waste gas treatment device for fertilizer production according to claim 1, characterized in that, A sealing gasket is provided at the connection between the outer ring (41) and the spray tower (1), and a rubber damping layer is provided at the fit between the limiting column (43) and the locking groove.

9. The waste gas treatment device for fertilizer production according to claim 3, characterized in that, The water pipe (23) is connected to an atomizing nozzle at one end inside the spray tower (1), and the atomizing nozzle is located above the flow guiding mechanism (5).

Images