Multi-stage purification type acid mist treatment tower

Abstract

The utility model relates to a multi-stage purification type acid mist treatment tower and belongs to the technical field of industrial waste gas treatment. Comprising an acid mist treatment tower main body, a circulating water tank, a dosing tank, a glass fiber reinforced plastic fan, a waste gas discharge pipe, a waste gas discharge pipe, a waste gas circulating pipe, a pre-purification filler layer, a core reaction filler layer, a fine treatment demisting filler layer, a filler loading screen frame, a spraying pipe and a conveying pipeline, the waste gas discharge pipe is communicated with the acid mist treatment tower main body through a waste gas circulating pipe. According to the utility model, through the three-layer stepped packing layout of the polyhedral hollow balls, the regular honeycomb packing and the composite wire mesh packing, gas-liquid contact can be enhanced step by step, the utilization rate of alkali liquor can be improved, large-particle acid mist can be intercepted in the first stage, core neutralization can be carried out in the second stage, and residual pollutants can be finely treated in the third stage, so that acid mist impurities can be subjected to stage treatment through the three-stage deep purification structure; impurities can be effectively dispersed, blockage is prevented, and the shutdown maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, and in particular to a multi-stage purification acid mist treatment tower. Background Technology

[0002] Multi-stage purification acid mist treatment towers are advanced waste gas treatment equipment specifically designed for the efficient removal of acidic gases generated during industrial production processes. Their core feature is the use of multi-stage, series-connected treatment units, which comprehensively utilize various purification principles to achieve higher removal efficiency, more stable operation, and wider adaptability than single-stage treatment towers.

[0003] A search revealed that Chinese patent CN202223111988.8 discloses an acid mist treatment tower device for hot-dip galvanizing lines. By setting up a partition plate inside the tower, the exhaust gas entering the tower through the flue pipe can be separated and treated accordingly under the gas rotation transmission of the nozzles corresponding to the fan blades driven by the motor. This enhances the gas neutralization treatment effect of the exhaust gas on the sprayed liquid of the nozzles, thus solving the problem that traditional acid mist treatment tower devices for hot-dip galvanizing lines often send the exhaust gas directly into the treatment tower for broad spray neutralization treatment, without being able to centrally treat the flue gas.

[0004] The above-mentioned technical solutions have the following drawbacks. Although traditional single-stage acid mist towers can separate waste gas through partition plates, thereby enhancing the gas neutralization effect of the waste gas on the sprayed liquid in the nozzles, if the alkali solution is reused for a long time in actual use, the pH value will be insufficient, and the treatment efficiency of high-concentration acid mist will be insufficient, which will easily lead to the problem of exceeding emission standards. In addition, the single packing layer is prone to clogging and requires frequent shutdown for maintenance. If the gas-liquid contact is insufficient, the utilization rate of alkali solution will be low. Therefore, a multi-stage purification acid mist treatment tower is proposed. Through the design of a multi-stage modular purification structure and waste gas circulation treatment channel, it can further purify acidic gases with high efficiency. It is especially suitable for acidic gases such as hydrochloric acid mist, sulfuric acid mist, and nitrogen oxides generated in industries such as electroplating, chemical industry, and metallurgy.

[0005] In view of this, this work improves and solves the above problems. Through dedicated research and application of theoretical principles, a technical solution with a reasonable design that can effectively improve the above defects has finally been proposed.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] This invention provides a multi-stage purification acid mist treatment tower. Traditional single-stage acid mist towers have problems in actual use, such as insufficient treatment efficiency for high-concentration acid mist, which easily leads to excessive emissions, easy blockage of the packing layer requiring frequent shutdowns for maintenance, and insufficient gas-liquid contact and low alkali utilization rate.

[0008] The present invention provides the following solution to the above-mentioned technical problems: A multi-stage purification acid mist treatment tower includes an acid mist treatment tower body, a circulating water tank, a dosing tank, a fiberglass fan, an exhaust gas discharge pipe, an exhaust gas inlet pipe, an exhaust gas circulation pipe, a pre-purification packing layer, a core reaction packing layer, a fine treatment demisting packing layer, a packing loading mesh frame, a spray pipe, and a conveying pipe. The acid mist treatment tower body is fixedly connected to the circulating water tank. The dosing tank is connected to the circulating water tank via a water pump. The exhaust gas discharge pipe is connected to the acid mist treatment tower body via the exhaust gas circulation pipe. One end of the fiberglass fan is connected to the exhaust gas discharge pipe, and the other end is connected to the acid mist treatment tower body via a conveying pipe. The exhaust gas inlet pipe is connected to the acid mist treatment tower body. The acid mist treatment tower body is equipped with a load-bearing grid, and four load-bearing grids are provided. The core reaction packing layer, the fine treatment demisting packing layer, and the packing loading mesh frame are respectively placed in the packing loading mesh frame. The packing loading mesh frame is connected to the load-bearing grid by screws. The spray pipe is connected to the circulating water tank via a water pump.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, a No. 1 sealing valve is installed at both ends of the waste gas circulation pipe, a No. 2 sealing valve is installed on the waste gas discharge pipe, and a No. 3 sealing valve is installed on the waste gas inlet pipe. Opening the No. 1 sealing valve allows the acid mist treatment tower body and the waste gas discharge pipe to be connected, thereby realizing the return of unqualified waste gas for reprocessing. Closing the No. 2 sealing valve can prevent unqualified waste gas from being discharged, and closing the No. 3 sealing valve can prevent waste gas from entering the acid mist treatment tower body.

[0011] Furthermore, the top of the filler loading mesh frame is provided with a mesh cover connected by screws, and the mesh cover at the top of the filler loading mesh frame can limit the internal filler.

[0012] Furthermore, three spray pipes are provided, which are respectively connected to the core reaction packing layer, the fine treatment demisting packing layer, and the packing loading mesh frame. The spray pipes are annular structures with spray heads evenly arranged at the bottom. The three spray pipes can spray acid mist treatment alkaline solution onto the three packing layers.

[0013] Furthermore, the pre-purification packing layer uses multi-faceted hollow spheres to intercept large particles of acid mist, thereby achieving pre-neutralization; the core reaction packing layer uses regular honeycomb packing to enhance gas-liquid mass transfer reaction; and the fine treatment demisting packing layer uses composite wire mesh packing to achieve fine demisting and residual absorption.

[0014] Furthermore, the acid mist treatment tower body is equipped with staggered guide plates, the bottom of the inner wall of the circulating water tank is set as a slope structure, the circulating water tank is equipped with a sealing door, and the circulating water tank is equipped with a filter screen and a pH detector. The slope structure and filter screen can prevent impurities from being transmitted to the side of the pumping liquid. The circulating water tank can be inspected through the sealing door, and the alkaline solution in the tank can be monitored through the pH detector.

[0015] Furthermore, the exhaust pipe is equipped with an acid mist gas concentration detector, which can monitor the treated exhaust gas. The SGA-C model can be used.

[0016] Furthermore, the main body of the acid mist treatment tower is equipped with a sealed maintenance door, and a filter basket is placed on the load-bearing grid at the bottom. The internal packing can be inspected and replaced through the sealed maintenance door, and the filter basket can collect impurities.

[0017] This invention provides a multi-stage purification acid mist treatment tower, which has the following advantages:

[0018] 1. Through a three-layer stepped packing layout of multi-faceted hollow spheres, regular honeycomb packing, and composite wire mesh packing, the gas-liquid contact can be enhanced step by step, improving the utilization rate of alkali solution. The first stage intercepts large particulate acid mist, the second stage neutralizes the core, and the third stage finely treats residual pollutants. This three-stage deep purification structure classifies and treats acid mist impurities, effectively disperses impurities, prevents blockage, and reduces the frequency of downtime maintenance.

[0019] 2. The three-layer stepped packing adopts a modular structure, which makes it easy to disassemble and replace the new packing in the main body of the acid mist treatment tower (1), making the inspection and maintenance work more convenient;

[0020] 3. Real-time monitoring of the pH value of the alkali solution. If the pH value is insufficient when the alkali solution is reused for a long time, the waste gas circulation treatment channel can be activated to intercept the non-compliant waste gas, thereby solving the problem that insufficient treatment efficiency of high-concentration acid mist can easily lead to excessive emissions.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1This is a schematic diagram of the structure of a multi-stage purification acid mist treatment tower provided in an embodiment of the present invention;

[0024] Figure 2 A front view of a multi-stage purification acid mist treatment tower provided in an embodiment of this utility model;

[0025] Figure 3 A schematic diagram of the structure of a pre-purification packing layer, a core reaction packing layer, and a fine treatment demisting packing layer in a multi-stage purification acid mist treatment tower provided in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of a spray pipe in a multi-stage purification acid mist treatment tower according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the packing mesh frame in a multi-stage purification acid mist treatment tower according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of a load-bearing grid in a multi-stage purification acid mist treatment tower, as provided in an embodiment of the present invention.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Main body of acid mist treatment tower; 2. Circulating water tank; 3. Dosing tank; 4. FRP fan; 5. Exhaust gas discharge pipe; 6. Exhaust gas inlet pipe; 7. Exhaust gas circulation pipe; 8. Pre-purification packing layer; 9. Core reaction packing layer; 10. Fine treatment demisting packing layer; 11. Packing loading mesh frame; 12. Spray pipe; 13. No. 1 sealing valve; 14. No. 2 sealing valve; 15. No. 3 sealing valve; 16. Load-bearing grid; 17. Interlaced guide plate; 18. Sealing door; 19. Filter screen; 20. pH detector; 21. Acid mist gas concentration detector; 22. Sealed maintenance door; 23. Filter basket; 24. Conveying pipeline. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] like Figure 1-6 As shown, a multi-stage purification acid mist treatment tower includes an acid mist treatment tower body 1, a circulating water tank 2, a dosing tank 3, a fiberglass fan 4, an exhaust gas discharge pipe 5, an exhaust gas inlet pipe 6, an exhaust gas circulation pipe 7, a pre-purification packing layer 8, a core reaction packing layer 9, a fine treatment demisting packing layer 10, a packing loading mesh frame 11, a spray pipe 12, and a conveying pipeline 24. The acid mist treatment tower body 1 is fixedly connected to the circulating water tank 2. The dosing tank 3 is connected to the circulating water tank 2 via a water pump. The exhaust gas discharge pipe 5 is connected to the acid mist treatment tower body via the exhaust gas circulation pipe 7. 1. One end of the FRP fan 4 is connected to the exhaust pipe 5, and the other end is connected to the acid mist treatment tower body 1 through the conveying pipe 24. The exhaust pipe 6 is connected to the acid mist treatment tower body 1. The acid mist treatment tower body 1 is equipped with a load-bearing grid 16. There are four load-bearing grids 16. The core reaction packing layer 9, the fine treatment demisting packing layer 10, and the packing loading mesh frame 11 are respectively placed in the packing loading mesh frame 11. The packing loading mesh frame 11 is connected to the load-bearing grid 16 by screws. The spray pipe 12 is connected to the circulating water tank 2 through a water pump.

[0034] Preferably, a No. 1 sealing valve 13 is provided at both ends of the waste gas circulation pipe 7, a No. 2 sealing valve 14 is provided on the waste gas discharge pipe 5, and a No. 3 sealing valve 15 is provided on the waste gas inlet pipe 6. Opening the No. 1 sealing valve 13 allows the acid mist treatment tower body 1 and the waste gas discharge pipe 5 to be connected, thereby realizing the return of unqualified waste gas for reprocessing. Closing the No. 2 sealing valve 14 can prevent unqualified waste gas from being discharged, and closing the No. 3 sealing valve 15 can prevent waste gas from entering the acid mist treatment tower body 1.

[0035] Preferably, the top of the filler loading mesh frame 11 is provided with a mesh cover connected by screws, and the mesh cover at the top of the filler loading mesh frame 11 can limit the internal filler.

[0036] Preferably, there are three spray pipes 12, which are respectively connected to the core reaction packing layer 9, the fine treatment demisting packing layer 10, and the packing loading mesh frame 11. The spray pipes 12 have a ring structure and spray heads are evenly arranged at the bottom. The three spray pipes 12 can spray acid mist treatment alkaline solution onto the three packing layers.

[0037] Preferably, the pre-purification packing layer 8 uses multi-faceted hollow spheres to intercept large particles of acid mist, thereby achieving pre-neutralization; the core reaction packing layer 9 uses regular honeycomb packing to enhance gas-liquid mass transfer reaction; and the fine treatment demisting packing layer 10 uses composite wire mesh packing to achieve fine demisting and residual absorption.

[0038] Preferably, the acid mist treatment tower body 1 is equipped with staggered guide plates 17, the bottom of the inner wall of the circulating water tank 2 is set as a slope structure, the circulating water tank 2 is equipped with a sealing door 18, and the circulating water tank 2 is equipped with a filter screen 19 and a pH detector 20. The slope structure and the filter screen 19 can prevent impurities from being transmitted to the side of the liquid being pumped. The circulating water tank 2 can be inspected through the sealing door 18, and the alkaline solution in the tank can be monitored through the pH detector 20.

[0039] Preferably, the exhaust pipe 5 is equipped with an acid mist gas concentration detector 21, which can monitor the treated exhaust gas. The SGA-501C model can be used.

[0040] Preferably, the acid mist treatment tower body 1 is equipped with a sealed inspection door 22, and a filter basket 23 is placed on the bottom load-bearing grid 16. The internal packing can be inspected and replaced through the sealed inspection door 22, and the filter basket 23 can collect impurities.

[0041] The specific working principle and usage method of this utility model are as follows: Start the fiberglass fan 4, and the exhaust gas can be introduced into the acid mist treatment tower body 1 through the exhaust gas inlet pipe 6. The absorbent NaOH, Ca(OH)2, and Na2CO3 in the circulating water tank 2 can be transferred to the spray pipe 12 through the water pump, so as to spray the pre-purification packing layer 8, the core reaction packing layer 9, and the fine treatment demisting packing layer 10. The pre-purification packing layer 8 adopts multi-faceted hollow spheres with a height of 800mm to intercept large particles of acid mist and realize the pre-neutralization of acid mist and alkali solution. The core reaction packing layer 9 adopts regular honeycomb packing with a height of 1200mm, which can further enhance the gas-liquid mass transfer reaction of acid mist and alkali solution. The fine treatment demisting packing layer 10 adopts composite wire mesh packing with a height of 400mm, which can finally realize acid mist demisting and residual absorption treatment. The treated exhaust gas can pass through the staggered guide plate 17 and be transferred to the exhaust gas outlet pipe 5 through the conveying pipe 24 for discharge.

[0042] The acid mist gas concentration detector 21 can detect the exhaust gas in the exhaust pipe 5. When the acid mist concentration is high and the pH value of the alkaline solution in the circulating water tank 2 is insufficient, the water pump at the dosing tank 3 can be started to replenish or replace the solution in the circulating water tank 2. The second sealing valve 14 is closed to stop the exhaust gas discharge, and the third sealing valve 15 is closed to stop the exhaust gas from entering the acid mist treatment tower body 1. The first sealing valve 13 at both ends of the exhaust gas circulation pipe 7 is opened so that the exhaust gas can be reintroduced into the acid mist treatment tower body 1 for repeated treatment until the acid mist gas concentration detector 21 detects that the exhaust gas treatment meets the standard and then resets and discharges, continuing the multi-stage purification acid mist treatment.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A multi-stage purification acid mist treatment tower, comprising an acid mist treatment tower body (1), a circulating water tank (2), a dosing tank (3), a fiberglass fan (4), a waste gas discharge pipe (5), a waste gas inlet pipe (6), a waste gas circulation pipe (7), a pre-purification packing layer (8), a core reaction packing layer (9), a fine treatment demisting packing layer (10), a packing loading mesh frame (11), a spray pipe (12), and a conveying pipe (24), characterized in that: The acid mist treatment tower body (1) is fixedly connected to the circulating water tank (2). The dosing tank (3) is connected to the circulating water tank (2) through a water pump. The exhaust gas discharge pipe (5) is connected to the acid mist treatment tower body (1) through the exhaust gas circulation pipe (7). One end of the fiberglass fan (4) is connected to the exhaust gas discharge pipe (5), and the other end is connected to the acid mist treatment tower body (1) through the conveying pipe (24). The exhaust gas inlet pipe (6) is connected to the acid mist treatment tower body (1). The acid mist treatment tower body (1) is equipped with a load-bearing grid (16). There are four load-bearing grids (16). The core reaction packing layer (9), the fine treatment demisting packing layer (10), and the packing loading mesh frame (11) are respectively placed in the packing loading mesh frame (11). The packing loading mesh frame (11) is connected to the load-bearing grid (16) through screws. The spray pipe (12) is connected to the circulating water tank (2) through a water pump.

2. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, Both ends of the exhaust gas circulation pipe (7) are equipped with a No. 1 sealing valve (13), the exhaust gas discharge pipe (5) is equipped with a No. 2 sealing valve (14), and the exhaust gas inlet pipe (6) is equipped with a No. 3 sealing valve (15).

3. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, The top of the filler loading mesh frame (11) is provided with a mesh cover connected by screws.

4. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, There are three spray pipes (12), which are respectively connected to the core reaction packing layer (9), the fine treatment demisting packing layer (10), and the packing loading mesh frame (11). The spray pipes (12) are annular structures and spray heads are evenly arranged at the bottom.

5. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, The pre-purification packing layer (8) uses multi-faceted hollow spheres to intercept large particulate acid mist, the core reaction packing layer (9) uses regular honeycomb packing, and the fine treatment demisting packing layer (10) uses composite wire mesh packing.

6. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, The acid mist treatment tower body (1) is equipped with staggered guide plates (17), the bottom of the inner wall of the circulating water tank (2) is set as a slope structure, the circulating water tank (2) is equipped with a sealing door (18), and the circulating water tank (2) is equipped with a filter screen (19) and a pH detector (20).

7. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, An acid mist gas concentration detector (21) is installed on the exhaust pipe (5).

8. The multi-stage purification acid mist treatment tower according to claim 1, characterized in that, The acid mist treatment tower body (1) is equipped with a sealed maintenance door (22), and a filter basket (23) is placed on the load-bearing grid (16) at the bottom.

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