Water bath dust removal device for treating ammonium sulfate tail gas

Abstract

The invention relates to the technical field of ammonium sulfate tail gas treatment, and discloses a water bath dust removal device for treating ammonium sulfate tail gas, the water bath dust removal device comprises a water washing assembly and a dust removal assembly, the water washing assembly comprises a water washing tank and an aeration module, the water washing tank is used for communicating a process water pipeline with a tail gas pipeline, and the aeration module is arranged in the water washing tank; the device is used for crushing bubbles formed by process water and tail gas. The dust removal assembly comprises a water washing tower and a dust removal module, the water washing tower is connected with the gas outlet of the water washing tank, and the dust removal module is arranged in the water washing tower and used for purifying tail gas. And through mutual cooperation of the washing assembly and the dust removal assembly, the process of purifying tail gas through double bathing is achieved. The dust removal efficiency and the dust removal capacity of the water bath dust removal device are improved, and the dust content in purified tail gas is effectively reduced.

Description

Technical Field

[0001] This application relates to the technical field of ammonium sulfate tail gas treatment, and particularly to a water bath dust removal device for treating ammonium sulfate tail gas. Background Art

[0002] In related technologies, the post-treatment of ammonium sulfate tail gas after ammonia desulfurization mostly uses water bath or water washing methods for dust removal. The dust removal efficiency is low and the treatment capacity is insufficient, resulting in a high dust content in the tail gas even after water washing, and a serious aerosol phenomenon, which poses serious environmental protection problems. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] The technical solution of this application provides a water bath dust removal device for treating ammonium sulfate tail gas. The water bath dust removal device includes: a water washing component and a dust removal component. The water washing component includes a water washing tank and an aeration module. The water washing tank is used to connect the process water pipeline and the tail gas pipeline. The aeration module is arranged in the water washing tank and is used to break the bubbles formed by the process water and the tail gas. The dust removal component includes a water washing tower and a dust removal module. The water washing tower is connected to the air outlet of the water washing tank. The dust removal module is arranged in the water washing tower and is used to purify the tail gas.

[0005] In some technical solutions provided by this application, the water washing component further includes: an ultrasonic generator. The ultrasonic generator is located in the water washing tank and is used to send ultrasonic waves to the process water.

[0006] In some technical solutions provided by this application, the aeration module includes: an air distribution pipe and nozzles. The air distribution pipe includes a main pipe and branch pipes that are connected and communicate with each other. The main pipe is connected to the tail gas pipeline. The branch pipes extend in a direction away from the main pipe. The nozzles are arranged on the pipe wall of the air distribution pipe, and multiple nozzles are located on both sides of the air distribution pipe respectively.

[0007] In some technical solutions provided by this application, the aeration module further includes: a mounting sleeve and a gas baffle cap. The mounting sleeve is connected to the pipe wall of the air distribution pipe. The nozzle is arranged in the mounting sleeve. The gas baffle cap is connected to the nozzle. A spacing is formed between the gas baffle surface of the gas baffle cap and the nozzle. The gas baffle surface is a curved surface and covers the outlet of the nozzle.

[0008] In some technical solutions provided by this application, the water washing component further includes: a liquid level gauge, a water replenishing valve and a control device. The liquid level gauge is arranged in the water washing tank and is used to detect the liquid level of the process water in the water washing tank. The water replenishing valve is arranged between the process water pipeline and the water washing tank. The water bath dust removal device further includes that when the detection result of the liquid level gauge is a low liquid level, the control device is used to control the water replenishing valve to open until the detection result of the liquid level gauge is a normal liquid level.

[0009] In some technical solutions provided by the present application, the dust removal module includes: a plate demister and a packing layer. The plate demister is connected to the inner wall of the water scrubbing tower, and the packing layer is located above the plate demister. The packing height of the packing layer is 1 meter to 2 meters.

[0010] In some technical solutions provided by the present application, the dust removal module further includes: a packing pressing plate, and the packing pressing plate covers the top surface of the packing layer.

[0011] In some technical solutions provided by the present application, the dust removal module further includes: a spraying layer and a water scrubbing pump. The spraying layer is arranged above the packing pressing plate and is used for spraying process water to the packing layer. The input end of the water scrubbing pump is connected to the water scrubbing tank, and the output end of the water scrubbing pump is connected to the spraying layer.

[0012] In some technical solutions provided by the present application, the dust removal module further includes: a wire mesh demister, and the wire mesh demister is located above the packing layer.

[0013] In some technical solutions provided by the present application, the dust removal module further includes: a first water washing layer, a second water washing layer and a differential pressure gauge. The first water washing layer is arranged on both sides of the plate demister, the second water washing layer is arranged above the wire mesh demister. The input ends of the first water washing layer and the second water washing layer are used to connect to the process water pipeline, and the differential pressure gauge is used to detect the differential pressure of the tail gas between the outlet and the inlet of the water scrubbing tower.

[0014] Compared with the related art, the present invention has at least the following beneficial effects:

[0015] Through the mutual cooperation of the water washing component and the dust removal component, the process of double bath purification of the tail gas is realized. The dust removal efficiency and dust removal capacity of the water bath dust removal device are improved, the dust content in the purified tail gas is effectively reduced, and the discharged tail gas can meet the environmental protection requirements. Moreover, since the first water washing operation is pre-set in the dust removal device, the scaling problem of the dust removal device is effectively alleviated, the blockage of the dust removal device is reduced, the operation of the whole dust removal device is more stable, the maintenance frequency is reduced, the normal continuous operation period of the system is increased, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the following detailed description of some embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing some embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a water bath dust removal device according to an embodiment provided by the present application;

[0018] Figure 2Partial structural schematic diagram of a water washing component provided by this application;

[0019] Figure 3 Partial structural schematic diagram of an aeration module provided by this application;

[0020] Figure 4 Partial structural schematic diagram of an aeration pipe provided by this application.

[0021] Among them, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0022] 10 Water bath dust removal device; 100 Water washing component; 110 Water washing tank; 111 Manhole; 112 Overflow port; 113 Drain port; 120 Aeration module; 121 Aeration pipe; 1211 Main pipe; 1212 Branch pipe; 122 Nozzle; 1221 Outer expansion part; 123 Installation sleeve; 124 Gas baffle cap; 1241 Gas baffle surface; 1242 Support rib; 130 Ultrasonic generator; 140 Liquid level gauge; 150 Water replenishing valve; 160 Control device; 200 Dust removal component; 210 Water washing tower; 211 Rainproof cap; 212 Chimney; 220 Dust removal module; 221 Plate type demister; 222 Packing layer; 223 Packing pressing disc; 224 Spraying layer; 225 Water washing pump; 226 Wire mesh demister; 227 First washing water layer; 228 Second washing water layer; 229 Differential pressure gauge; 20 Process water pipeline; 30 Tail gas pipeline; 40 Drainage pipeline. Detailed implementation manners

[0023] In order to better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of this application and the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. Without conflict, the technical features in the embodiments of this application and the embodiments can be combined with each other.

[0024] An embodiment of this application provides a water bath dust removal device 10 for treating ammonium sulfate tail gas. As Figure 1 shown, the water bath dust removal device 10 includes: a water washing component 100 and a dust removal component 200. The water washing component 100 includes a water washing tank 110 and an aeration module 120. The water washing tank 110 is used to connect the process water pipeline 20 and the tail gas pipeline 30. The aeration module 120 is arranged in the water washing tank 110 and is used to break the bubbles formed by the process water and the tail gas. The dust removal component 200 includes a water washing tower 210 and a dust removal module 220. The water washing tower 210 is connected to the air outlet of the water washing tank 110. The dust removal module 220 is arranged in the water washing tower 210, and the dust removal module 220 is used to purify the tail gas.

[0025] In this embodiment, the tail gas is the tail gas of ammonium sulfate post-treatment, and the water washing tank 110 is connected to the process water pipeline 20 and the tail gas pipeline 30 respectively, so that the process water and tail gas flow into the water washing tank 110 through the process water pipeline 20 and the tail gas pipeline 30 respectively. Among them, the tail gas flow rate of the ammonium sulfate drying tail gas in the tail gas pipeline 30 is 35000m 3 / h to 60000m 3 / h, the tail gas pressure is 5kPa to 7kPa, and the length, width and height of the water washing tank 110 are 5m×3m×1.5m respectively.

[0026] Aeration module 120 is submerged in the process water and connected to the exhaust gas line 30. The exhaust gas flows through aeration module 120 into the washing tank 110, where it comes into contact with the process water. During the aeration process, the exhaust gas forms bubbles as it contacts the process water. These bubbles rise to the surface, expanding the contact area between the exhaust gas and the process water, ensuring full contact. Large dust particles within the bubbles are mixed and absorbed by the process water, undergoing the first water bath. Furthermore, aeration accelerates the diffusion of the exhaust gas in the process water, increasing the gas-liquid mass transfer dynamics at the bubble surface and enhancing the washing effect.

[0027] Exemplarily, the water washing tank 110 is provided with a manhole 111, an overflow port 112, and a drain port 113. Manhole 111 is used for installation, maintenance, and safety inspections of the water washing tank 110. The overflow port 112 is lower than the outlet height of the process water pipeline 20. Exemplarily, the overflow port 112 may be 1.3 meters high. This allows excess process water to be discharged through the overflow port 112, preventing backflow into the process water pipeline 20. The drain port 113 is located at the bottom of the water washing tank 110 and is connected to the drainage pipeline 40. The drain port 113 is used to empty the washed process water into the pit during maintenance.

[0028] The inlet of the water washing tower 210 is fixedly connected to the air outlet of the water washing tank 110. The exhaust gas after water washing in the water washing tank 110 enters the water washing tower 210 and moves from bottom to top. A detachable dust removal module 220 is provided in the water washing tower 210. The dust removal module 220 is used to purify the exhaust gas discharged from the water washing tank 110 by separating, absorbing and capturing droplets, and remove the remaining dust in the exhaust gas, so as to give the exhaust gas a second water bath so that the exhaust gas meets the exhaust standard.

[0029] For example, water scrubber 210 has a diameter of 3 meters and a height of 5 meters. A chimney 212 is located at the top of the scrubber 210. Chimney 212 is 3 meters high, which helps to generate a certain amount of suction. A rain cap 211 is installed above chimney 212 to prevent rainwater from entering chimney 212 and contaminating the scrubber 210.

[0030] Through the mutual cooperation of the water washing component 100 and the dust removal component 200, the process of double-bathing and purifying the tail gas is realized. The dust removal efficiency and dust removal capacity of the water bath dust removal device 10 are improved, the dust content in the purified tail gas is effectively reduced, and the discharged tail gas can meet the environmental protection requirements. Moreover, since the first water washing device is placed in front of the dust removal module 220, the scaling problem of the dust removal module 220 is effectively alleviated, the blockage of the dust removal module 220 is reduced, the operation of the entire water bath dust removal device 10 is more stable, the maintenance frequency of the device is reduced, the normal continuous operation period of the system is increased, and the production cost is reduced.

[0031] In some embodiments provided by the present application, as Figure 2 shown, the water washing component 100 further includes: an ultrasonic generator 130, which is located in the water washing tank 110, and the ultrasonic generator 130 is used to send ultrasonic waves to the process water.

[0032] In this embodiment, the ultrasonic generator 130 is detachably connected to the water washing tank 110 and is used to generate ultrasonic vibrations to wash the process water and the tail gas in the water washing tank 110. The ultrasonic waves break the large bubbles generated in the gas-liquid mixing process into a large number of small bubbles, increasing the gas-liquid contact area and improving the oscillation diffusion effect and water washing effect of the tail gas in the process water.

[0033] Exemplarily, the number of ultrasonic generators 130 can be multiple, and the multiple ultrasonic generators 130 are respectively located on the inner walls around the water washing tank 110. The frequencies of the multiple ultrasonic generators 130 are different from each other to prevent the cancellation interference phenomenon caused by ultrasonic waves of the same frequency. The ultrasonic generator 130 is connected to a control device 160 outside the water washing tank 110, and the control device 160 is used to control the ultrasonic generator 130 to generate ultrasonic vibrations and adjust the frequency and power of the ultrasonic generator 130 to balance the oscillation effect and the cleaning effect. Specifically, the distance between the ultrasonic generator 130 and the bottom of the water washing tank 110 is 0.8 meters, the number of ultrasonic generators 130 is 4, the ultrasonic frequency is 20 kHz to 130 kHz, and the total power of the 4 ultrasonic generators 130 is 100 kw to 200 kw.

[0034] In some embodiments provided by the present application, as Figure 3 and Figure 4 shown, the aeration module 120 includes: an aeration pipe 121 and a nozzle 122. The aeration pipe 121 includes a main pipe 1211 and a branch pipe 1212 that are connected and communicate with each other. The main pipe 1211 is connected to the tail gas pipeline 30, the branch pipe 1212 extends in a direction away from the main pipe 1211, the nozzle 122 is provided on the pipe wall of the aeration pipe 121, and a plurality of nozzles 122 are respectively located on both sides of the aeration pipe 121.

[0035] In this embodiment, the aeration pipe 121 is detachably connected to the water washing tank 110, and the main pipe 1211 and the branch pipe 1212 can both extend in the horizontal direction. The branch pipe 1212 is located on both sides of the main pipe 1211 and extends in a direction away from the main pipe 1211. Multiple branch pipes 1212 are distributed at intervals along the axial direction of the main pipe 1211, so that the aeration pipe 121 forms a shape similar to the Chinese character "丰", which expands the emission range of the exhaust gas in the water washing tank 110 and makes the exhaust gas emission more uniform.

[0036] After entering aeration pipe 121 through main pipe 1211, exhaust gas is discharged through nozzles 122 in main pipe 1211 and branch pipe 1212. Nozzles 122 are used to release exhaust gas from aeration pipe 121 into the process water. Nozzles 122 are located at the top and bottom of aeration pipe 121, allowing aeration from both top and bottom to occur simultaneously. This increases the dispersion and uniformity of the bubbles released and ensures thorough mixing of the exhaust gas and process water.

[0037] For example, the operating liquid level of the water wash tank 110 is 1.0 to 1.2 meters, and the aeration pipe 121 is installed at a height of 0.9 meters. The aeration pipe 121 is 50 cm below the tail gas pipeline 30 to prevent process water from the water wash tank 110 from flowing back into the tail gas pipeline 30. The upper nozzles 122 of the aeration pipe 121 are submerged to a depth of greater than or equal to 0.1 meters below the liquid level to ensure effective aeration. There are 60 nozzles 122, each with a diameter of 50 mm. The total aeration area of the nozzles 122 is 40% to 45% of the cross-sectional area of the tail gas pipeline 30, optimizing the aeration efficiency of the aeration pipe 121.

[0038] In some embodiments provided in this application, Figure 3 As shown, the aeration module 120 also includes: a mounting sleeve 123 and an air blocking cap 124, the mounting sleeve 123 is connected to the pipe wall of the aeration pipe 121, the nozzle 122 is arranged in the mounting sleeve 123, the air blocking cap 124 is connected to the nozzle 122, and a gap is formed between the air blocking surface 1241 of the air blocking cap 124 and the nozzle 122, the air blocking surface 1241 is a curved surface and is covered at the outlet of the nozzle 122.

[0039] In this embodiment, the mounting sleeve 123 may be welded to the top and bottom pipe walls of the aeration pipe 121 , and the inner wall of the mounting sleeve 123 is detachably connected to the outer wall of the nozzle 122 .

[0040] Illustratively, the mounting sleeve 123 is threadedly connected to the nozzle 122. The outlet end of the nozzle 122 is provided with a flared portion 1221. This flared portion 1221 is located outside the mounting sleeve 123 and extends radially outward from the nozzle 122, giving the nozzle 122 a T-shaped cross-section. A gap exists between the flared portion 1221 and the mounting sleeve 123 to accommodate vibrations generated by the nozzle 122 during aeration.

[0041] The outlet end of the nozzle 122 is provided with a gas baffle cap 124. The end face of the gas baffle cap 124 facing the nozzle 122 is a crescent-shaped gas baffle surface 1241 protruding outward. Along the axial projection of the nozzle 122, the projection range of the gas baffle surface 1241 covers the outer periphery of the outlet end of the nozzle 122. The gas baffle cap 124 guides the tail gas ejected from the nozzle 122 through the middle curved shape, so that the air flow is obliquely deflected to both sides of the installation sleeve 123. The gas baffle cap 124 prevents the tail gas air flow from directly impacting the liquid surface to form a short circuit, increases the contact time between the tail gas and the process water, and prevents the excessive water carried by the tail gas.

[0042] Exemplarily, the gas baffle cap 124 is provided with support ribs 1242. A plurality of support ribs 1242 are connected to the nozzle 122. One end of the support rib 1242 is fixedly connected to the outlet end of the nozzle 122, and the other end is fixedly connected to the gas baffle surface 1241 of the gas baffle cap 124. The support ribs 1242 are used to support the gas baffle cap 124 and form a gap for the flowing air flow.

[0043] In some embodiments provided by the present application, as Figure 1 shown, the water washing assembly 100 further includes: a liquid level gauge 140, a water replenishing valve 150, and a control device 160. The liquid level gauge 140 is arranged in the water washing tank 110 and is used to detect the liquid level of the process water in the water washing tank 110. The water replenishing valve 150 is arranged between the process water pipeline 20 and the water washing tank 110. When the detection result of the liquid level gauge 140 is a low liquid level, the control device 160 is used to control the water replenishing valve 150 to open until the detection result of the liquid level gauge 140 is a normal liquid level.

[0044] In this embodiment, the liquid level gauge 140 is detachably connected to the outer wall of the water washing tank 110, and the liquid level gauge 140 is used to detect the height of the process water liquid level in the water washing tank 110. The water replenishing valve 150 is interlocked with the liquid level gauge 140. When the detection result of the liquid level gauge 140 is lower than the liquid level threshold, the water washing tank 110 is in a low liquid level state. The control device 160 alarms and opens the water replenishing valve 150 to deliver the process water into the water washing tank 110 to realize the automatic water replenishing function. When the water is replenished to the normal liquid level value of the water washing tank 110, the control device 160 closes the water replenishing valve 150 to ensure the normal operation of the water washing tank 110.

[0045] In some embodiments provided by the present application, as Figure 1 shown, the dust removal module 220 includes: a plate demister 221 and a packing layer 222. The plate demister 221 is connected to the inner wall of the water washing tower 210. The packing layer 222 is located above the plate demister 221, and the packing height of the packing layer 222 is 1 meter to 2 meters.

[0046] In this embodiment, the plate demister 221 is detachably connected to the inner wall of the water scrubbing tower 210. The plate demister 221 is close to the air outlet of the water scrubbing tank 110. The plate demister 221 is used to remove the droplets and particulate matters in the tail gas, improve the cleanliness of the tail gas, and form the first purification operation of the dust removal module 220.

[0047] A packing layer 222 is also detachably provided inside the water scrubbing tower 210. The packing layer 222 is located above the plate demister 221. Specifically, the filling height of the packing layer 222 can be 1.5 meters. There are gaps between the packings in the packing layer 222. After the process water is sprayed above the packing layer 222, it can flow along the surface of the packing to form a liquid film and disperse in the upward flowing tail gas. The rising air flow contacts the liquid film descending on the surface of the packing layer 222. Due to the increase in the contact surface area, the contact between the tail gas and the process water is more sufficient. The fine dust in the air flow is further washed and absorbed by the process water and falls into the water scrubbing tank 110, forming the second purification operation of the dust removal module 220.

[0048] Exemplarily, the packing material of the packing layer 222 is a high-temperature resistant material or a corrosion-resistant material. The packing layer 222 can withstand a maximum temperature of 100 °C. The packing material can be Pall rings, Raschig rings, or Intalox saddles made of UPVC material.

[0049] In some embodiments provided by the present application, as Figure 1 shown, the dust removal module 220 further includes: a packing pressing plate 223, and the packing pressing plate 223 covers the top surface of the packing layer 222.

[0050] In this embodiment, the packing pressing plate 223 is arranged on the top surface of the packing layer 222 and is detachably connected to the water scrubbing tower 210. The packing pressing plate 223 is used to compact the packing layer 222 and prevent the packing from being washed away by the air flow.

[0051] In some embodiments provided by the present application, as Figure 1 shown, the dust removal module 220 further includes: a spraying layer 224 and a water scrubbing pump 225. The spraying layer 224 is arranged above the packing pressing plate 223 and is used to spray the process water onto the packing layer 222. The input end of the water scrubbing pump 225 is connected to the water scrubbing tank 110, and the output end of the water scrubbing pump 225 is connected to the spraying layer 224.

[0052] In this embodiment, the spraying layer 224 is located above the packing pressing plate 223 and is detachably connected to the inner wall of the outlet end of the water scrubbing tower 210. The water scrubbing pump 225 is located outside the water scrubbing tank 110. The water scrubbing pump 225 is connected to the outlet of the water scrubbing tank 110 and the spraying layer 224 through pipelines, so that the process water in the water scrubbing tank 110 is transported to the upper part of the packing pressing plate 223 through the water scrubbing pump 225 and sprayed onto the packing layer 222. The process water falls back into the water scrubbing tank 110 after flowing through the packing layer 222, thus realizing cyclic dust removal.

[0053] Exemplarily, the number of the water washing pumps 225 is two, one is in use and the other is in standby during daily use. The rated flow rate of the water washing pumps 225 is 25 m 3 / h, ensuring that the liquid-gas ratio is between 0.33 l / m 3 and 0.57 l / m 3 .

[0054] In some embodiments provided by the present application, as Figure 1 shown, the dust removal module 220 further includes: a wire mesh demister 226, and the wire mesh demister 226 is located above the packing layer 222.

[0055] In this embodiment, the wire mesh demister 226 is detachably connected to the inner wall of the water washing tower 210 and is located above the packing layer 222. The wire mesh demister 226 is used to capture fine droplets in the tail gas to form the third purification operation of the dust removal module 220. Since the tail gas contains moisture and is likely to form droplets, the wire mesh demister 226 includes demisting wire meshes. When the tail gas flows towards the wire mesh demister 226 and forms droplets, the droplets will flow along the inclined surface of the demisting wire meshes and drip to the bottom of the water washing tower 210.

[0056] In some embodiments provided by the present application, as Figure 1 shown, the dust removal module 220 further includes: a first washing water layer 227, a second washing water layer 228 and a differential pressure gauge 229. The first washing water layer 227 is arranged on both sides of the plate demister 221, the second washing water layer 228 is arranged above the wire mesh demister 226. The input ends of the first washing water layer 227 and the second washing water layer 228 are used to connect to the process water pipeline 20, and the differential pressure gauge 229 is used to detect the differential pressure of the tail gas between the outlet and the inlet of the water washing tower 210.

[0057] In this embodiment, the first washing water layer 227 is arranged in two layers opposite to each other on both sides of the plate demister 221, and there is a gap between the first washing water layer 227 and the plate demister 221 to provide a channel for the tail gas to flow through the plate demister 221. The second washing water layer 228 is detachably connected above the wire mesh demister 226, and the process water pipeline 20 is respectively connected to the first washing water layer 227 and the second washing water layer 228. The two detection ends of the differential pressure gauge 229 are respectively detachably connected to the inlet and outlet of the water washing tower 210, and the differential pressure gauge 229 is used to detect the pressure drop of the water washing tower 210. The pressure drop of the water washing tower 210 should be less than the set differential pressure, and the set differential pressure can be 600 Pa. When the detection result of the differential pressure gauge 229 is higher than the set differential pressure, the wire mesh demister 226 and the plate demister 221 can be flushed in time through the first washing water layer 227 and the second washing water layer 228 to ensure the purification effect of the dust removal assembly 200 and avoid blockage. Specifically, manual valves are respectively arranged between the process water pipeline 20 and the first washing water layer 227 and the first washing water layer 227, and the manual flushing of the wire mesh demister 226 and the plate demister 221 can be respectively realized by opening the manual valves.

[0058] In a specific embodiment, an ultrasonic-based ammonium sulfate post-treatment tail gas water bath dust removal device 10, the dust removal assembly 200 is fixedly connected to the water washing assembly 100, and the dust removal assembly 200 is located downstream of the water washing assembly 100 for removing dust particles from the tail gas through separation, absorption and interception processes.

[0059] The water washing assembly 100 includes: a water washing tank 110, an air diffuser pipe 121, an ultrasonic generator 130, a water washing pump 225 and a control device 160, and the first water bath dust removal of the tail gas is realized by combining aeration and ultrasonic oscillation to remove large particle dust in the tail gas. The dust removal module 220 includes: a first washing water layer 227, a plate demister 221, a packing layer 222, a packing pressing disc 223, a spray layer 224, a wire mesh demister 226 and a second washing water layer 228, and the dust removal module 220 performs a second water bath on the tail gas containing fine dust particles from bottom to top.

[0060] The process water from the battery limit is mainly used for replenishing the water in the water washing tank 110, flushing the surface of the wire mesh demister 226, and flushing the surface of the plate demister 221. The ammonium sulfate tail gas pipeline 30 enters the water washing tank 110 with a height drop of 50 cm. After the tail gas is washed by aeration in water, it leaves the water bath. The bubbles float up and break. The fine particulate dust tail gas continues to enter the water washing tower 210. The air flow first passes through the plate demister 221 to separate the large liquid droplets in the air flow, and then enters the bulk packing layer 222. The fine dust in the air flow is further washed and absorbed by water and falls into the water washing tank 110. After being washed by water, the tail gas leaves the packing layer 222. Under the trapping action of the wire mesh demister 226, the fine droplets in the tail gas are intercepted and finally discharged to a safe location. The ammonium sulfate dry tail gas can achieve a dust removal efficiency of 99.5% after being washed by ultrasonic water bath and packing double water washing. A water washing pump 225 is installed on one side of the water washing tank 110. The liquid level gauge 140 and the makeup water valve 150 realize the automatic makeup water function of the water washing tank 110. The differential pressure gauge 229 is used to monitor the pressure drop of the water washing tower 210, that is, the differential pressure inside the water washing tower 210.

[0061] In the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more unless otherwise clearly defined. The terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0063] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] The above are only some embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water bath dust removal device for treating ammonium sulfate tail gas, characterized in that, Comprising: A water washing component, the water washing component includes a water washing tank and an aeration module. The water washing tank is used to connect a process water pipeline and an exhaust gas pipeline. The aeration module is arranged in the water washing tank and is used to break the bubbles formed by the process water and the exhaust gas. A dust removal component, the dust removal component includes a water washing tower and a dust removal module. The water washing tower is connected to the air outlet of the water washing tank. The dust removal module is arranged in the water washing tower, and the dust removal module is used to purify the exhaust gas.

2. The water bath dust removal device according to claim 1, characterized in that, The water washing component further includes: An ultrasonic generator, located in the water washing tank, and the ultrasonic generator is used to send ultrasonic waves to the process water.

3. The water bath dust removal device according to claim 1, characterized in that, The aeration module includes: An aeration pipe, the aeration pipe includes a main pipe and branch pipes that are connected and communicated. The main pipe is connected to the exhaust gas pipeline, and the branch pipes extend in a direction away from the main pipe. Nozzles, arranged on the pipe wall of the aeration pipe, and a plurality of the nozzles are respectively located on both sides of the aeration pipe.

4. The water bath dust removal device according to claim 3, wherein, The aeration module further includes: An installation sleeve, connected to the pipe wall of the aeration pipe, and the nozzle is arranged in the installation sleeve. A gas blocking cap, connected to the nozzle, and a spacing is formed between the gas blocking surface of the gas blocking cap and the nozzle. The gas blocking surface is a curved surface and covers the outlet of the nozzle.

5. The water bath dust removal device according to claim 1, characterized in that, The water washing component further includes: A liquid level gauge, arranged in the water washing tank and used to detect the liquid level of the process water in the water washing tank. A water replenishing valve, arranged between the process water pipeline and the water washing tank. A control device, when the detection result of the liquid level gauge is a low liquid level, the control device is used to control the water replenishing valve to open until the detection result of the liquid level gauge is a normal liquid level.

6. The water bath dust removal device according to claim 1, characterized in that, The dust removal module includes: A plate demister, connected to the inner wall of the water washing tower. A packing layer, located above the plate demister, and the filling height of the packing layer is 1 meter to 2 meters.

7. The water bath dust removal device according to claim 6, characterized in that, The dust removal module further includes: A packing pressing plate, covering the top surface of the packing layer.

8. The water bath dust removal device according to claim 6, wherein The dust removal module further includes: A spraying layer, arranged above the packing pressing plate and used to spray the process water to the packing layer. A water washing pump, the input end of the water washing pump is connected to the water washing tank, and the output end of the water washing pump is connected to the spraying layer.

9. The water bath dust removal device according to claim 6, wherein, The dust removal module further includes: A wire mesh demister, located above the packing layer.

10. The water bath dust removal device according to claim 9, wherein The dust removal module further includes: A first water washing layer, arranged on both sides of the plate demister. A second water washing layer, arranged above the wire mesh demister, and the input ends of the first water washing layer and the second water washing layer are used to connect the process water pipeline. A differential pressure gauge, used to detect the differential pressure of the exhaust gas between the outlet and the inlet of the water washing tower.

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