Efficient purification combined tower for acid mist waste gas

Abstract

The utility model provides an efficient purification combined tower for acid mist waste gas, which relates to the technical field of acid mist waste gas treatment and comprises a tower frame, an alkali liquor collecting bottom tank, a liquid slag discharge pipe, a purification tower, an alkali liquor return pipe, a turbulent flow packed column, a partition plate, a waste gas inlet pipe, a spraying top tray, a spraying head, a purified gas outlet box and a purified gas discharge pipe, the tower frame is horizontally arranged, and a horizontal alkali liquor collecting bottom tank is fixedly supported at the upper end of the tower frame; and a purification tower is arranged above the alkali liquor collection bottom tank. According to the utility model, through the multi-stage spraying system, the waste gas can be gradually contacted with alkali liquor with different pH values in the rising process in the tower, the strategy of gradually increasing the pH values of the alkali liquor effectively deals with acidic substances with different concentrations in the waste gas, and the neutralization reaction is ensured to be fully carried out, so that the acidic components in the waste gas are greatly reduced. The staged treatment mode not only improves the purification efficiency, but also enables the alkali liquor to be used more efficiently, and reduces resource waste.

Description

Technical Field

[0001] The utility model relates to the technical field of acid mist waste gas treatment, in particular to a high-efficiency purification combined tower for acid mist waste gas. Background Art

[0002] In the existing field of acid mist waste gas treatment technology, traditional waste gas treatment equipment often suffers from low purification efficiency, severe alkali waste, and the tendency to generate secondary pollution during the treatment process. Given the varying concentrations of acidic components in waste gas, a single spray system often struggles to achieve ideal purification results. This is especially true when treating highly concentrated acidic waste gas, which often requires large amounts of alkali solution and produces suboptimal purification results.

[0003] Furthermore, the packing layers or baffles in traditional waste gas treatment equipment are often simplistic in design, failing to effectively enhance the mixing of waste gas and alkali solution. This results in inadequate acid-base neutralization, limiting purification efficiency. Furthermore, structural flaws in the equipment can easily lead to cross-contamination of alkali solution during the treatment process, further compromising purification effectiveness.

[0004] The design of the clean gas outlet is also critical. Traditional equipment often finds it difficult to avoid the entrainment of alkaline solution when discharging waste gas, which not only affects the quality of the purified gas, but may also cause corrosion to subsequent processing equipment or emission pipelines. Utility Model Content

[0005] The utility model relates to an acid mist waste gas high-efficiency purification combined tower, which can efficiently purify the acid mist waste gas, reduce alkali solution waste, avoid secondary pollution and has a reasonable structure.

[0006] In a first aspect, the present invention provides a high-efficiency purification combination tower for acid mist waste gas, which specifically includes: a tower frame, an alkali solution collecting bottom tank, a liquid residue discharge pipe, a purification tower, an alkali solution reflux pipe, a turbulent filler column, a partition, an exhaust gas inlet pipe, a spray top plate, a spray head, a clean gas outlet box, and a clean gas discharge pipe; the tower frame is placed horizontally, and the upper end of the tower frame is fixedly supported by a horizontal alkali solution collecting bottom tank; a purification tower is provided above the alkali solution collecting bottom tank, an exhaust gas inlet pipe is provided at the bottom of one side of the purification tower, and a clean gas outlet box is provided at the top position of the other side of the purification tower; the purification tower is distributed upward in a stepped manner from the end where the exhaust gas inlet pipe is located to the end where the clean gas outlet box is located, and a spray top plate is installed on the top of each stage of the purification tower, and the upper end connecting pipe of the spray top plate is connected to the external alkali solution supply pipe.

[0007] Optionally, the bottom of the alkali liquid collecting bottom tank is a columnar structure that is narrow at the top and wide at the bottom, and a liquid slag discharge pipe is provided on the side wall of one end of the columnar part of the bottom of the alkali liquid collecting bottom tank, and the liquid slag discharge pipe is used to discharge the alkali liquid in the alkali liquid collecting bottom tank.

[0008] Optionally, an alkali solution reflux pipe is connected between the bottom of each stage of the purification tower and the alkali solution collecting bottom tank, and the alkali solution in the alkali solution collecting bottom tank overflows into the alkali solution reflux pipe to prevent cross-gas.

[0009] Optionally, the tower chamber of each stage of the purification tower is connected to the adjacent tower chamber, and a vertical partition is provided on the upper half of the connecting position.

[0010] Optionally, each stage of the purification tower has a tower cavity horizontally provided with turbulent filling columns staggered up and down.

[0011] Optionally, the spray top plate is located in the tower cavity of the purification tower and has spray heads distributed in a matrix shape at the bottom. The spray top plate on the purification tower sprays alkali solution with increasing pH value in sequence from low to high.

[0012] Optionally, the clean air outlet box is a truncated cone structure that is wider at one end close to the purification tower, and an upward clean air discharge pipe is provided at the top of the clean air outlet box.

[0013] The utility model provides a high-efficiency purification combined tower for acid mist waste gas, which has the following beneficial effects:

[0014] First, through a multi-stage spray system, the exhaust gas gradually comes into contact with alkali solutions of varying pH values ​​as it rises within the tower. This strategy of gradually increasing the pH value of the alkali solution effectively addresses the varying concentrations of acidic substances in the exhaust gas, ensuring the full neutralization reaction and significantly reducing the acidic content in the exhaust gas. This hierarchical treatment approach not only improves purification efficiency but also makes the use of alkali solution more efficient and reduces resource waste.

[0015] Secondly, the ingenious combination of baffles and turbulent packing columns further enhances the mixing effect between the exhaust gas and the alkali solution. The baffle design ensures smooth airflow while effectively preventing direct cross-flow of the alkali solution, thus avoiding cross-contamination during the purification process. The unique arrangement of the turbulent packing columns significantly increases the contact area and contact time between the exhaust gas and the alkali solution, allowing the acid-base neutralization reaction to proceed more fully, thereby improving the purification effect.

[0016] Furthermore, the truncated cone design of the clean gas outlet box not only facilitates the collection and discharge of exhaust gases, but also cleverly prevents alkali liquor from flowing out with the exhaust gas, further ensuring the quality of the purified gas. Furthermore, the bottom of the alkali liquor collection tank features a columnar structure that is narrow at the top and wide at the bottom. This design not only facilitates the collection and sedimentation of alkali liquor, but also facilitates subsequent processing and reuse. The liquid residue discharge pipe at the bottom regularly removes solid impurities deposited at the bottom of the tank, ensuring the purity of the alkali liquor and the long-term stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0018] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached figure:

[0020] Figure 1 Shows a schematic diagram of the first axial view of the present invention;

[0021] Figure 2 Shows a schematic diagram of the second axis structure of the present invention;

[0022] Figure 3 It shows a schematic diagram of the axial structure of a purification tower of the present invention in a partially half-cut separated state;

[0023] Figure 4 Shows the utility model Figure 3 A is a schematic diagram of the structure of the enlarged part.

[0024] Reference Signs List

[0025] 1. Tower frame; 2. Alkali liquid collection tank; 201. Liquid slag discharge pipe; 3. Purification tower; 301. Alkali liquid reflux pipe; 302. Turbulent packing column; 303. Partition; 4. Waste gas inlet pipe; 5. Spray top plate; 501. Spray head; 6. Clean gas outlet box; 601. Clean gas discharge pipe. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figures 1 to 4 :

[0028] The utility model proposes an acid mist waste gas efficient purification combination tower, comprising: a tower frame 1, an alkali solution collecting bottom tank 2, a liquid residue discharge pipe 201, a purification tower 3, an alkali solution reflux pipe 301, a turbulent filler column 302, a partition 303, an exhaust gas inlet pipe 4, a spray top plate 5, a spray head 501, a clean gas outlet box 6, and a clean gas discharge pipe 601; the tower frame 1 is placed horizontally, and the upper end of the tower frame 1 is fixedly supported with a horizontal alkali solution collecting bottom tank 2; a purification tower 3 is provided above the alkali solution collecting bottom tank 2, an exhaust gas inlet pipe 4 is provided at the bottom of one side of the purification tower 3, and a clean gas outlet box 6 is provided at the top position of the other side of the purification tower 3; the purification tower 3 is distributed upward in a stepped manner from one end where the exhaust gas inlet pipe 4 is located to the other end where the clean gas outlet box 6 is located, a spray top plate 5 is installed on the top of each stage of the purification tower 3, and the upper end connecting pipe of the spray top plate 5 is connected to the external alkali solution supply pipe.

[0029] Among them, the bottom of the alkali liquid collecting bottom tank 2 is a columnar structure that is narrow at the top and wide at the bottom. A liquid slag discharge pipe 201 is provided on the side wall of one end of the columnar part of the bottom of the alkali liquid collecting bottom tank 2. The liquid slag discharge pipe 201 is used to discharge the alkali liquid in the alkali liquid collecting bottom tank 2.

[0030] Among them, an alkali liquid reflux pipe 301 is connected between the bottom of each stage of the purification tower 3 and the alkali liquid collecting bottom tank 2, and the alkali liquid in the alkali liquid collecting bottom tank 2 overflows into the alkali liquid reflux pipe 301 to prevent gas cross-contamination.

[0031] The tower chambers of each stage of the purification tower 3 are connected to the adjacent tower chambers, and a vertical partition 303 is provided on the upper half of the connecting position.

[0032] In each stage of the purification tower 3, turbulent filling columns 302 are horizontally arranged in an upper and lower staggered manner in the tower cavity.

[0033] Among them, the spray top plate 5 is located at the bottom of the purification tower 3 in the tower cavity and has spray heads 501 distributed in a matrix shape. The spray top plate 5 on the purification tower 3 sprays alkali solution with increasing pH in sequence from low to high.

[0034] In the second embodiment, based on the first embodiment, the clean gas outlet box 6 is a truncated cone structure with a wider end close to the purification tower 3 , and an upward clean gas discharge pipe 601 is provided on the top of the clean gas outlet box 6 .

[0035] The working principle of this embodiment is as follows:

[0036] The purification process begins when exhaust gas enters purification tower 3 through exhaust gas inlet pipe 4. As the exhaust gas rises within the tower, it encounters the first-stage spray top plate 5 and its spray heads 501. These spray heads, driven by an external alkali solution supply pipe, evenly spray low-pH alkali solution, initially neutralizing the acidic substances in the exhaust gas and reducing the acid content.

[0037] As the exhaust gas continues to rise, it enters the next stage of purification tower 3. The bottom of each tower stage is connected to the alkali liquid collection tank 2 via an alkali liquid return pipe 301, ensuring the recycling of the alkali liquid. Furthermore, each tower chamber is separated from the adjacent chamber by a partition 303. However, a channel is left at the top of the partition to allow the exhaust gas to pass through. This design ensures smooth airflow while preventing direct cross-flow of alkali liquid.

[0038] During its ascent, the exhaust gas passes through the spray area of ​​the spray top tray 5 multiple times, with the pH of the lye sprayed gradually increasing with each spray to counteract the remaining acidic substances in the exhaust gas. The spray heads 501 on the spray top tray are arranged in a matrix pattern, ensuring that the lye evenly covers the exhaust gas, improving neutralization efficiency. Furthermore, the unique arrangement of the turbulent packing columns 302 within the tower cavity increases the contact area and contact time between the exhaust gas and the lye, promoting the full acid-base neutralization reaction.

[0039] After multiple stages of purification, the acidic components in the exhaust gas are significantly reduced, ultimately entering the clean gas outlet box 6. This outlet box is designed as a truncated cone with a wider end near the purification tower 3, which facilitates the collection and discharge of the exhaust gas while also preventing the alkali solution from flowing out with it. The clean gas discharge pipe 601 at the top is responsible for discharging the purified gas into the atmosphere.

[0040] In addition, the alkali liquid collection tank 2 serves as the alkali liquid storage and circulation center of the entire purification system. Its bottom adopts a columnar structure with a narrow top and a wide bottom to facilitate the collection and precipitation of alkali liquid. The liquid residue discharge pipe 201 at the bottom is used to regularly discharge solid impurities deposited at the bottom of the tank.

[0041] In this article, there are several points to note:

[0042] 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0043] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0044] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A high-efficiency purification combined tower for acid mist waste gas, comprising: A tower (1), an alkali solution collecting bottom tank (2), a purification tower (3), an exhaust gas inlet pipe (4), a spray top plate (5) and a clean gas outlet box (6); characterized in that the tower (1) is placed horizontally, and the upper end of the tower (1) is fixedly supported with a horizontal alkali solution collecting bottom tank (2); a purification tower (3) is provided above the alkali solution collecting bottom tank (2), an exhaust gas inlet pipe (4) is provided at the bottom of one side of the purification tower (3), and a clean gas outlet box (6) is provided at the top position of the other side of the purification tower (3); the purification tower (3) is distributed upward in a stepped manner from one end where the exhaust gas inlet pipe (4) is located to one end where the clean gas outlet box (6) is located, and a spray top plate (5) is installed on the top of each stage of the purification tower (3), and the upper end connecting pipe of the spray top plate (5) is connected to the external alkali solution supply pipe.

2. The acid mist waste gas efficient purification combined tower according to claim 1, characterized in that: The bottom of the alkali liquid collecting bottom tank (2) is a columnar structure that is narrow at the top and wide at the bottom. A liquid residue discharge pipe (201) is provided on the side wall of one end of the columnar portion of the bottom of the alkali liquid collecting bottom tank (2). The liquid residue discharge pipe (201) is used to discharge the alkali liquid in the alkali liquid collecting bottom tank (2).

3. The acid mist waste gas efficient purification combined tower according to claim 1, characterized in that: An alkali solution reflux pipe (301) is connected between the bottom of each stage of the purification tower (3) and the alkali solution collecting bottom tank (2), and the alkali solution in the alkali solution collecting bottom tank (2) overflows into the alkali solution reflux pipe (301) to prevent cross-gas.

4. The acid mist waste gas efficient purification combined tower according to claim 1, characterized in that: Each stage of the purification tower (3) is connected to the adjacent tower cavity, and a vertical partition (303) is provided on the upper half of the connection position.

5. The acid mist waste gas efficient purification combined tower according to claim 1, characterized in that: Each stage of the purification tower (3) is provided with a horizontally staggered flow-turbulating filler column (302) in the tower cavity.

6. The acid mist waste gas efficient purification combined tower according to claim 1, characterized in that: The spray top plate (5) is located at the bottom of the purification tower (3) in the tower cavity and has spray heads (501) distributed in a matrix shape. The spray top plate (5) on the purification tower (3) sprays alkali solution with increasing pH in sequence from low to high.

7. The acid mist waste gas efficient purification combined tower according to claim 1, characterized in that: The clean gas outlet box (6) is a truncated cone structure with a wider end close to the purification tower (3), and an upward clean gas discharge pipe (601) is provided at the top of the clean gas outlet box (6).

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