Acid mist removal device

Abstract

The utility model discloses an acid mist removal device relates to water treatment technical field. Acid mist removal device is used for the container of storage acid liquid to remove the acid gas of volatile, including overflow pool, lye maintaining unit, at least one layer gas phase neutralization layer and overflow discharge unit, and the overflow pool contains alkaline liquid and is equipped with overflow port in lateral wall, and the container passes through acid mist exhaust pipeline and imports acid gas into overflow pool, and the acid mist exhaust pipeline export is located below the liquid surface and forms liquid seal. Lye maintaining unit supplements alkaline liquid to overflow pool through lye supplement pipeline to make the alkaline liquid in overflow pool always keep in the set liquid level. At least one layer gas phase neutralization layer seals and covers the top of overflow pool, and can take place neutralization reaction with the acid mist that has not been absorbed by the alkaline liquid in overflow pool. Overflow discharge unit includes the waste water collection pool in communication with overflow port. The acid mist removal device improves the absorption capacity of acid gas, and effectively prevents acid gas overflow and corrodes surrounding equipment and harms human health.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to an acid mist removal device. Background Technology

[0002] In industrial water treatment systems, hydrochloric acid, stored in containers, is a commonly used chemical. Figure 1 This is a schematic diagram of the structure of an acid mist removal device in the prior art, such as... Figure 1 As shown, an acid replenishment pipeline 102, an ultrasonic level gauge 101, and an exhaust pipeline 200 are typically installed at the top of container 100. Hydrochloric acid is replenished into container 100 through the acid replenishment pipeline 102, and the level of hydrochloric acid in container 100 is detected by the ultrasonic level gauge 101. Because hydrochloric acid is highly volatile, corrosive, and irritating, a water washing pipeline 300 is connected in series with the exhaust pipeline 200. The outlet of the exhaust pipeline 200 is immersed in wastewater tank 400. The water washing pipeline 300 is kept full-flow through a normally open water supply valve 301, so that the volatilized acidic gas is absorbed by water through the exhaust pipeline 200 and then discharged into wastewater tank 400.

[0003] However, while this method provides basic protection during routine static storage, it has the following drawbacks: When the pump is turned on to replenish hydrochloric acid into container 100 through acid replenishment pipeline 102, the pump action and the rise in liquid level in container 100 cause a large amount of acidic gas to be generated. This results in some of the acidic gas overflowing from the gaps at the top of container 100, exceeding the absorption limit of water washing pipeline 300. Consequently, the acidic gas that cannot be absorbed enters wastewater pool 400 and volatilizes from wastewater pool 400 into the atmosphere, causing severe corrosion to surrounding equipment. At the same time, the volatilized acidic gas is toxic and harmful to human health.

[0004] In the existing technology, the corrosion of surrounding equipment and the harm to human health caused by acid gas leakage can be reduced by regularly inspecting and replacing the sealing of container 100 and wastewater pool 400. However, it still cannot fundamentally solve the problem of acid gas leakage when hydrochloric acid is replenished by pump. Utility Model Content

[0005] The purpose of this invention is to provide an acid mist removal device that can effectively absorb the acidic gases volatilized in the container, preventing the acidic gases from overflowing and corroding surrounding equipment and causing harm to the human body.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An acid mist removal device is used to remove acidic gases volatilized from containers storing acidic liquids, including:

[0008] An overflow tank is filled with alkaline liquid and has an overflow port on its side wall. The container introduces the acidic gas into the overflow tank through an acid mist discharge pipe. The outlet of the acid mist discharge pipe is located below the liquid surface of the alkaline liquid to form a liquid seal.

[0009] An alkaline solution maintenance unit includes an alkaline solution replenishment pipeline that replenishes alkaline liquid to the overflow tank so that the alkaline liquid in the overflow tank is always maintained at a set level.

[0010] At least one gas-phase neutralization layer is provided to seal and cover the top of the overflow tank. The gas-phase neutralization layer is capable of neutralizing acidic gases that are not absorbed by the alkaline liquid in the overflow tank.

[0011] The overflow discharge unit includes a wastewater collection tank connected to the overflow outlet.

[0012] As an optional embodiment of the acid mist removal device, the gas-phase neutralization layer includes:

[0013] The top neutralization layer includes a sealing baffle and a first spray assembly disposed on the sealing baffle. The sealing baffle seals and covers the top opening of the overflow tank, and the first spray assembly sprays alkaline liquid into the overflow tank.

[0014] As an optional embodiment of the acid mist removal device, the gas-phase neutralization layer further includes:

[0015] An intermediate neutralization layer is disposed between the alkaline liquid in the overflow tank and the top neutralization layer. The intermediate neutralization layer includes a perforated plate and a second spray assembly. The second spray assembly sprays alkaline liquid into the overflow tank. The perforated plate has a plurality of through holes for the acidic gas to pass through.

[0016] As an optional embodiment of the acid mist removal device, the first spray assembly includes a plurality of first nozzles, and the plurality of through holes and the plurality of first nozzles are arranged in a one-to-one correspondence.

[0017] As an alternative to the acid mist removal device, the second spray assembly includes a plurality of second nozzles, a plurality of through holes, and a plurality of second nozzles staggered together.

[0018] As an optional embodiment of the acid mist removal device, the alkali solution maintaining unit includes:

[0019] A liquid level sensor is installed on the inner wall of the overflow tank;

[0020] An electric regulating valve is installed on the alkali replenishment pipeline and is communicatively connected to the liquid level sensor.

[0021] As an optional solution for the acid mist removal device, the overflow discharge unit further includes a U-shaped self-overflowing pipe, one end of which is connected to the overflow port on the side wall of the overflow pool, and the other end is connected to the wastewater inlet on the side wall of the wastewater collection pool.

[0022] As an alternative to the acid mist removal device, the end of the U-shaped overflow pipe connected to the overflow port is lower than the end connected to the wastewater inlet.

[0023] As an optional solution for the acid mist removal device, the bottom of the U-shaped overflow pipe is provided with a slag discharge port, which is detachably connected with a sealing cap.

[0024] As an optional embodiment of the acid mist removal device, the outlet end of the acid mist discharge pipeline has a flared structure.

[0025] The beneficial effects of this utility model are:

[0026] The acid mist removal device provided by this utility model introduces acidic gas volatilized from a container storing acidic liquid into an alkaline liquid overflow tank via an acid mist discharge pipe, where it undergoes a neutralization reaction with the alkaline liquid in the overflow tank. The outlet of the acid mist discharge pipe extends into the alkaline liquid to form a water seal, preventing acid mist overflow. The liquid produced by the neutralization reaction automatically overflows into a wastewater collection tank. An alkaline liquid maintenance unit supplies liquid to the overflow tank via an alkaline liquid replenishment pipe, ensuring that the alkaline liquid in the overflow tank is always maintained at a set level. Furthermore, by setting at least one gas-phase neutralization layer, it neutralizes any acidic gas that is not completely absorbed by the alkaline liquid in the overflow tank when a large amount of acidic gas is generated in the container, further preventing overflow from the overflow tank and wastewater tank when the pressure of the acidic gas in the overflow tank increases. This acid mist removal device improves the absorption capacity of acidic gases and effectively prevents acidic gas overflow from corroding surrounding equipment and harming human health. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of an acid mist removal device in the prior art;

[0028] Figure 2 This is a schematic diagram of the structure of the acid mist removal device provided in a specific embodiment of this utility model;

[0029] Figure 3 This is a bottom view of the intermediate neutralizing layer provided in a specific embodiment of this utility model;

[0030] Figure 4 This is a bottom view of the top neutralizing layer provided in a specific embodiment of this utility model.

[0031] In the picture:

[0032] 100. Container; 101. Ultrasonic level gauge; 102. Acid replenishment pipeline;

[0033] 200. Exhaust pipe;

[0034] 300. Water washing pipeline; 301. Water supply valve;

[0035] 400. Wastewater pool;

[0036] 1. Overflow pool; 11. Overflow outlet;

[0037] 2. Acid mist discharge pipeline;

[0038] 3. Alkali solution maintenance unit; 31. Liquid level sensor; 32. Electric regulating valve; 33. Alkali solution replenishment pipeline;

[0039] 4. Gas phase neutralization layer; 41. Top neutralization layer; 411. Sealing baffle; 412. First nozzle; 413. First infusion tube; 42. Intermediate neutralization layer; 421. Porous plate; 4211. Through hole; 422. Second nozzle; 423. Second infusion tube;

[0040] 5. Overflow discharge unit; 51. Wastewater collection tank; 511. Wastewater inlet; 52. U-shaped self-overflow pipe; 53. Sealing cover; 54. First connecting pipe; 55. Second connecting pipe. Detailed Implementation

[0041] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0044] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] Figure 2 This is a schematic diagram of the structure of the acid mist removal device provided in a specific embodiment of this utility model, as shown below. Figure 2 As shown, in an industrial water treatment system, acidic liquids, as commonly used chemicals, are typically stored in container 100. The top of container 100 is sealed to prevent acid mist from escaping into the air. The top of container 100 is connected to an acid replenishment pipeline 102, an ultrasonic level gauge 101, and an acid mist discharge pipeline 2. During water treatment, the acidic liquid in container 100 reacts chemically with pollutants in the water, reducing its concentration. The acid replenishment pipeline 102 is connected to an acidic liquid source and is equipped with a pump. When the pump is turned on, acidic liquid from the source enters container 100 through the acid replenishment pipeline 102, replenishing the acidic liquid in container 100. The ultrasonic level gauge 101 detects the level of acidic liquid in container 100. When the acidic liquid reaches its maximum level, the pump shuts off, and the acidic liquid source stops replenishing the container 100.

[0048] During the process of replenishing acidic liquid into container 100 by pumping, the pumping action and the rise in liquid level in container 100 reduce the space for acidic gas, generating a large amount of acidic gas and causing a sudden increase in pressure within container 100. To prevent acidic gas from overflowing from the gaps in the top seal of container 100 and the wastewater collection tank 51, this embodiment provides an acid mist removal device for removing acidic gas volatilized from container 100 storing acidic liquid. This device can quickly absorb large amounts of acidic gas, preventing it from overflowing and corroding surrounding equipment or posing a health hazard.

[0049] The acid mist removal device provided in this embodiment includes an overflow tank 1, an alkaline solution maintenance unit 3, at least one gas-phase neutralization layer 4, and an overflow discharge unit 5. The overflow tank 1 contains alkaline liquid and has an overflow port 11 on its side wall. The container 100 introduces acidic gas into the overflow tank 1 through an acid mist discharge pipe 2. The outlet of the acid mist discharge pipe 2 is located below the liquid surface of the alkaline liquid, forming a liquid seal. The alkaline solution maintenance unit 3 replenishes alkaline liquid to the overflow tank 1 through an alkaline solution replenishment pipe 33 to keep the alkaline liquid in the overflow tank 1 at a set level. At least one gas-phase neutralization layer 4 seals and covers the top of the overflow tank 1. The gas-phase neutralization layer 4 can neutralize acid mist that has not been absorbed by the alkaline liquid in the overflow tank 1. The overflow discharge unit 5 includes a wastewater collection tank 51 connected to the overflow port 11.

[0050] When a large amount of acidic gas is released in container 100, the acidic gas enters the alkaline liquid below the overflow tank 1 through acid mist discharge pipe 2, where it reacts chemically with the alkaline liquid, thereby absorbing most of the acidic gas. Acidic gas that is not absorbed by the alkaline liquid in overflow tank 1 overflows the alkaline liquid and rises to the top of overflow tank 1, where it undergoes a secondary neutralization reaction with at least one gas-phase neutralization layer 4 located at the top of overflow tank 1. The liquid produced by the secondary neutralization reaction drips back into the alkaline liquid in overflow tank 1 and then overflows and is discharged to wastewater collection tank 51, thus effectively preventing the pressure of acidic gas in overflow tank 1 from increasing and overflowing from the top of overflow tank 1 and wastewater collection tank 51 into the atmosphere. This acid mist removal device causes a large amount of acidic gas volatilized from container 100 to first react chemically with the alkaline liquid in overflow pool 1. The acidic gas that has not undergone chemical reaction rises and undergoes a secondary neutralization reaction with the gas phase neutralization layer 4, which improves the absorption capacity of acidic gas and can effectively prevent acidic gas from overflowing and corroding surrounding equipment and harming human health.

[0051] In one embodiment, the outlet end of the acid mist discharge pipe 2 has a flared structure. By setting the outlet end of the acid mist discharge pipe 2 to a flared structure, the Venturi effect caused by the abrupt change in the cross-section of the flared structure accelerates airflow diffusion, reducing the average diameter of the acid mist bubble cluster in the alkaline liquid, optimizing the dispersion of the acid mist bubbles, and extending the time the acid mist gas remains in the alkaline liquid, thereby enabling a more complete neutralization reaction with the alkaline liquid. Simultaneously, the vortex shear force generated at the edge of the flared structure further cuts the bubbles, further extending the contact time between the acid mist and the alkaline liquid, thus improving the efficiency of the neutralization reaction between the acid gas and the alkaline liquid.

[0052] For example, the cross-section of the flared structure is set as an isosceles trapezoid, and the airflow area of ​​the flared structure with the cross-section set as an isosceles trapezoid gradually increases.

[0053] Of course, in other embodiments, the cross-section of the flared structure can also be a cross-section with a diameter greater than that of the acid mist discharge pipe 2.

[0054] In one embodiment, the alkali solution maintaining unit 3 includes a level sensor 31 and an electric regulating valve 32. The level sensor 31 is located on the inner wall of the overflow tank 1 and can detect the level of the alkaline liquid in the overflow tank 1 in real time. The electric regulating valve 32 is located on the alkali solution replenishment pipeline 33 and is communicatively connected to the level sensor 31. The level sensor 31 and the electric regulating valve 32 form a closed-loop control system, which suppresses the level fluctuation of the alkaline liquid in the overflow tank 1 within a small range in real time, ensuring a constant liquid seal depth to prevent acid mist escape and eliminate sealing failure caused by a sudden drop in liquid level.

[0055] For example, the liquid level sensor 31 is an RF admittance sensor, and the probe material is made of Hastelloy C276, which is resistant to strong corrosion and suitable for alkaline liquid environments.

[0056] The acid mist removal device also includes a controller. A liquid level sensor 31 is communicatively connected to the controller, and an electric regulating valve 32 is electrically connected to the controller. The liquid level value detected by the liquid level sensor 31 is sent to the controller in real time. The controller controls the opening and closing of the electric regulating valve 32 based on the received liquid level value to avoid sealing failure caused by a sudden drop in liquid level. Specifically, the alkaline solution replenishment pipeline 33 is connected to the alkaline liquid source. When the liquid level value detected by the liquid level sensor 31 is lower than the set liquid level, the controller controls the electric regulating valve 32 to open, and the alkaline liquid supplied by the alkaline liquid source enters the overflow tank 1 through the alkaline solution replenishment pipeline 33. When the liquid level of the alkaline liquid in the overflow tank 1 reaches the set liquid level, the controller controls the electric regulating valve 32 to close.

[0057] In one embodiment, the gas-phase neutralization layer 4 includes a top neutralization layer 41, which includes a sealing baffle 411 and a first spray assembly disposed on the sealing baffle 411. The sealing baffle 411 seals and covers the top opening of the overflow tank 1, and the first spray assembly sprays alkaline liquid into the overflow tank 1. When a large amount of acidic gas volatilizes in the container 100, the portion of the acidic gas that is not absorbed by the alkaline liquid in the overflow tank 1 flows upward. When it flows to the top neutralization layer 41, the first spray assembly sprays alkaline liquid, which neutralizes the acidic gas. The resulting water droplets fall into the overflow tank 1 and then overflow and are discharged, so that no more acid mist is generated in the liquid discharged into the wastewater collection tank 51.

[0058] For example, the first spray assembly includes a plurality of first nozzles 412 and a plurality of first infusion pipes 413, with the plurality of first nozzles 412 and the plurality of first infusion pipes 413 connected in a one-to-one correspondence. The plurality of first infusion pipes 413 are all connected to an alkaline liquid source. The alkaline liquid provided by the alkaline liquid source enters the first nozzles 412 through the first infusion pipes 413, so that the first nozzles 412 can spray alkaline liquid that reacts with acidic gas.

[0059] In one embodiment, the gas-phase neutralization layer 4 further includes an intermediate neutralization layer 42, which is disposed between the alkaline liquid in the overflow tank 1 and the top neutralization layer 41. The intermediate neutralization layer 42 includes a perforated plate 421 and a second spray assembly, which sprays alkaline liquid into the overflow tank 1. The perforated plate 421 has a plurality of through holes 4211 for acid mist to pass through. Furthermore, by providing an intermediate neutralization layer 42 between the top neutralization layer 41 and the alkaline liquid in the overflow tank 1, acidic gases that are not absorbed by the alkaline liquid in the overflow tank 1 first pass through the intermediate neutralization layer 42 and undergo a neutralization reaction with the alkaline liquid sprayed by the second spray assembly. The remaining acidic gas rises through the through hole 4211 and enters the space between the intermediate neutralization layer 42 and the top neutralization layer 41. The first spray component of the top neutralization layer 41 sprays alkaline liquid to neutralize the remaining acidic gas a second time, thus achieving multiple neutralization of the acidic gas, improving the removal efficiency of the acidic gas, and effectively reducing the overflow of the acidic gas.

[0060] The overflow tank 1 contains an alkaline liquid, an intermediate neutralization layer 42, and a top neutralization layer 41, forming a gradient neutralization system: primary interception, secondary enhancement, and final purification. Unabsorbed acidic gas in the alkaline liquid of the overflow tank 1 rises to the intermediate neutralization layer 42, where it is covered and intercepted by the alkaline liquid sprayed by the second spray assembly, resulting in a neutralization reaction. Residual acidic gas rises slowly through the through-holes 4211 on the intermediate neutralization layer 42, prolonging the gas-liquid contact time. After entering the space between the top neutralization layer 41 and the intermediate neutralization layer 42, the acidic gas is secondary neutralized by the alkaline liquid sprayed by the first spray assembly. Residual acidic gas remains between the top neutralization layer 41 and the intermediate neutralization layer 42, continuously neutralized by the alkaline liquid sprayed by the first spray assembly until the acidic gas is completely removed.

[0061] For example, the second spray assembly includes a plurality of second nozzles 422 and a plurality of second infusion pipes 423, which are connected one-to-one. The plurality of second nozzles 422 and the plurality of second infusion pipes 423 are all connected to an alkaline liquid source. The alkaline liquid provided by the alkaline liquid source enters the second nozzles 422 through the second infusion pipes 423, so that the second nozzles 422 can spray alkaline liquid that reacts with acidic gas.

[0062] Of course, in other embodiments, the top neutralizing layer 41 and the middle neutralizing layer 42 may not be equipped with a spray assembly. Instead, alkaline solid filler is filled on the surfaces of the sealing baffle 411 and the perforated plate 421. When the acidic gas rises, it encounters the alkaline solid filler and undergoes a neutralization reaction with it. The alkaline solid filler is calcium hydroxide supported on a honeycomb ceramic carrier.

[0063] Furthermore, to detect whether acidic gas is escaping from the top of the overflow tank 1 and the wastewater collection tank 51, pH sensors can be installed at the top of these tanks. The pH sensors detect the pH value of the air above the overflow tank 1 and wastewater collection tank 51. The pH sensors are communicatively connected to the controller, and both the first nozzle 412 and the second nozzle 422 are electrically connected to the controller. The pH sensor transmits the detected pH value to the controller, which then controls the amount of alkaline liquid sprayed by the first nozzle 412 and the second nozzle 422 based on the received pH value. If the pH value detected by the pH sensor is less than 7, it indicates that acidic gas is escaping, and the controller will control the first nozzle 412 and the second nozzle 422 to increase the amount of alkaline liquid sprayed.

[0064] In one embodiment, multiple through holes 4211 and multiple first nozzles 412 are arranged in a one-to-one correspondence. Acidic gas rising through the through holes 4211 into the space between the intermediate neutralization layer 42 and the top neutralization layer 41 directly reacts with the alkaline liquid sprayed by the first nozzles 412, improving neutralization efficiency. Simultaneously, when the first nozzles 412 spray the alkaline liquid, they diffuse in a conical umbrella shape, allowing the acidic gas entering the space between the intermediate neutralization layer 42 and the top neutralization layer 41 to remain there. The first nozzles 412 continuously spray alkaline liquid, constantly reacting with the acidic gas, and the resulting liquid eventually falls into the overflow pool 1 through the through holes 4211.

[0065] In one embodiment, multiple through holes 4211 and multiple second nozzles 422 are staggered. When the second nozzles 422 spray alkaline liquid, they diffuse in a conical umbrella shape. The staggered arrangement of the through holes 4211 and the second nozzles 422 allows the spray range of the second nozzles 422 to cover the edge area of ​​adjacent through holes 4211, forming a continuous liquid film on the surface of the porous plate 421. Acidic gas must penetrate the liquid film to enter the through holes 4211, thus improving the neutralization efficiency.

[0066] Figure 3 This is a bottom view of the intermediate neutralizing layer provided in a specific embodiment of this utility model. Figure 4 This is a bottom view of the top neutralizing layer provided in a specific embodiment of this utility model, as shown below. Figure 3 and Figure 4 As shown, second nozzles 422 are arranged on the perforated plate 421, and a through hole 4211 is provided between two adjacent rows of second nozzles 422, with each through hole 4211 located between two adjacent rows of second nozzles 422. First nozzles 412 on the sealing baffle 411 are correspondingly arranged with these through holes 4211. Most of the acidic gas has reacted chemically with the alkaline liquid in the overflow tank 1, with only a small amount of unreacted acidic gas rising. This gas is first fully neutralized by the alkaline liquid sprayed by the second nozzles 422 in the intermediate neutralization layer 42, and a very small portion of the acidic gas enters the space between the top neutralization layer 41 and the intermediate neutralization layer 42 through the through holes 4211. Therefore, the design uses far fewer first nozzles 412 than second nozzles 422; even so, the alkaline liquid sprayed by the first nozzles 412 is sufficient to ensure a complete reaction with the small amount of acidic gas entering the space between the top neutralization layer 41 and the intermediate neutralization layer 42.

[0067] In one embodiment, the overflow discharge unit 5 further includes a U-shaped self-overflow pipe 52. One end of the U-shaped self-overflow pipe 52 is connected to the overflow port 11 on the side wall of the overflow pool 1, and the other end is connected to the wastewater inlet 511 on the side wall of the wastewater collection pool 51. A bidirectional isolation barrier is formed at the bottom of the U-shaped self-overflow pipe 52, and the static liquid column maintained at the bend of the U-shaped self-overflow pipe 52 effectively blocks the reverse diffusion of acidic gases from the wastewater collection pool 51 to the overflow pool 1, eliminating environmental pollution caused by secondary volatilization in the prior art. The damping effect of the U-shaped structure on liquid level fluctuations stabilizes the overflow flow within a safe range, avoiding the gas-liquid two-phase flow impact of traditional straight discharge pipes. The abrupt reduction in flow velocity at the U-shaped bend at the bottom of the U-shaped self-overflow pipe 52 improves the suspended solids settling rate.

[0068] For example, one end of the U-shaped overflow pipe 52 is connected to the overflow port 11 through the first connecting pipe 54, and the other end is connected to the wastewater inlet 511 through the second connecting pipe 55.

[0069] In one embodiment, the end of the U-shaped overflow pipe 52 connected to the overflow port 11 is lower than the end connected to the wastewater inlet 511. This arrangement effectively prevents liquid in the wastewater collection tank 51 from flowing back into the overflow tank 1.

[0070] For example, both the first connecting pipe 54 and the second connecting pipe 55 are configured as horizontal pipes, and the height of the overflow port 11 is lower than the height of the wastewater inlet 511, so that the liquid in the overflow pool 1 enters the U-shaped overflow pipe 52 through the first connecting pipe 54 and then enters the second connecting pipe 55, and finally enters the wastewater collection pool 51, realizing one-way flow.

[0071] In one embodiment, the bottom of the U-shaped overflow pipe 52 is provided with a slag discharge port, which is detachably connected to a sealing cap 53. By providing a slag discharge port with a detachable sealing cap 53 at the bottom of the U-shaped overflow pipe 52, the unidirectional flow of liquid from the overflow tank 1 to the wastewater collection tank 51 promotes efficient sedimentation of solid particles in the low-speed zone at the bottom of the U-shaped bend. When the sealing cap 53 is opened periodically, the static pressure of the liquid can automatically flush out the sediment, achieving zero-downtime slag removal.

[0072] For example, the sealing cap 53 is connected to the slag discharge port by a quick-release clamp, and the bottom of the U-shaped self-overflowing pipe 52 is equipped with a flange with a fluororubber sealing ring to ensure that there is no leakage when the slag discharge port is sealed by the sealing cap 53, thereby eliminating the risk of pipeline blockage and preventing secondary pollution.

[0073] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An acid mist removal device for removing acidic gases volatilized from a container (100) storing acidic liquid, characterized in that, include: An overflow tank (1) is filled with alkaline liquid and has an overflow port (11) on its side wall. The container (100) introduces the acidic gas into the overflow tank (1) through an acid mist discharge pipe (2). The outlet of the acid mist discharge pipe (2) is located below the liquid surface of the alkaline liquid to form a liquid seal. The alkaline solution maintenance unit (3) includes an alkaline solution replenishment pipeline (33), which replenishes alkaline liquid to the overflow tank (1) so that the alkaline liquid in the overflow tank (1) is always kept at a set level. At least one gas-phase neutralization layer (4) is sealed to cover the top of the overflow pool (1), and the gas-phase neutralization layer (4) can neutralize the acidic gas that is not absorbed by the alkaline liquid in the overflow pool (1); The overflow discharge unit (5) includes a wastewater collection tank (51) connected to the overflow outlet (11).

2. The acid mist removal device of claim 1, wherein The gas-phase neutralization layer (4) comprises: The top neutralization layer (41) includes a sealing baffle (411) and a first spray assembly disposed on the sealing baffle (411), the sealing baffle (411) sealingly covering the top opening of the overflow pool (1), and the first spray assembly spraying alkaline liquid into the overflow pool (1).

3. The acid mist removal device of claim 2, wherein The gas-phase neutralization layer (4) further includes: An intermediate neutralization layer (42) is disposed between the alkaline liquid in the overflow tank (1) and the top neutralization layer (41). The intermediate neutralization layer (42) includes a porous plate (421) and a second spray assembly. The second spray assembly sprays alkaline liquid into the overflow tank (1). The porous plate (421) has a plurality of through holes (4211) for the acidic gas to pass through.

4. The acid mist removal device of claim 3, wherein The first spray assembly includes a plurality of first nozzles (412), and a plurality of through holes (4211) and a plurality of first nozzles (412) are arranged in a one-to-one correspondence.

5. The acid mist removal device of claim 4, wherein The second spray assembly includes a plurality of second nozzles (422), a plurality of through holes (4211), and a plurality of second nozzles (422) staggered together.

6. The acid mist removal device of claim 1, wherein The alkali solution maintenance unit (3) includes: A liquid level sensor (31) is installed on the inner wall of the overflow pool (1); An electric regulating valve (32) is installed on the alkali replenishment pipeline (33) and is communicatively connected to the liquid level sensor (31).

7. The acid mist removal device of claim 1, wherein The overflow discharge unit (5) also includes a U-shaped self-overflow pipe (52), one end of which is connected to the overflow port (11) on the side wall of the overflow pool (1), and the other end is connected to the wastewater inlet (511) on the side wall of the wastewater collection pool (51).

8. The acid mist removal device of claim 7, wherein The end of the U-shaped overflow pipe (52) connected to the overflow port (11) is lower than the end connected to the wastewater inlet (511).

9. The acid mist removal device of claim 7, wherein The bottom of the U-shaped overflow pipe (52) is provided with a slag discharge port, and the slag discharge port is detachably connected with a sealing cap (53).

10. The acid mist removal device according to any one of claims 1 to 9, characterized in that The outlet end of the acid mist discharge pipeline (2) has a flared structure.

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