Acid mist recovery device for pickling bath of cold rolling mill

Abstract

The utility model discloses an acid mist recovery device for a pickling bath of a cold rolling mill. The acid mist recycling box body is fixedly mounted at the upper part of the acid liquor collecting tank through supporting legs; the air inlet pipe and the exhaust pipe are respectively arranged on two side walls of the acid mist recovery box body; the induced draft fan is arranged on the side wall of the acid liquor collecting tank through a mounting bottom plate, and an exhaust inlet of the induced draft fan is connected with the exhaust pipe; the acid liquor recycling pipe is arranged at the upper part of the acid liquor collecting tank, the inlet end is communicated with the bottom of the acid mist recycling box body, and the outlet end is communicated with the top of the acid liquor collecting tank; the acid liquor spraying mechanism is arranged at the top of the acid mist recycling box body, a liquor outlet of the acid liquor spraying mechanism is formed in the acid mist recycling box body, and a liquor inlet of the acid liquor spraying mechanism is communicated with the acid liquor collecting pool.

Description

Technical Field

[0001] The utility model relates to the technical field of acid mist recovery equipment for pickling tanks, in particular to an acid mist recovery device for a cold rolling mill pickling tank. Background Art

[0002] The cold rolling mill pickling process is to first heat the acid solution to the process temperature and then use a circulating pump for circulating pickling. In this process, a large amount of HCL gas will evaporate from the hydrochloric acid along with the water vapor, thus producing a large amount of acid mist, which seriously pollutes the surrounding environment. The loss of hydrochloric acid also causes certain economic losses to the enterprise. Therefore, it is very important to recycle the acid mist in the pickling tank.

[0003] The existing acid mist recovery device of the pickling tank of the cold rolling mill generally has a technical defect when recovering the acid mist drawn out from the pickling tank, that is, the acid mist in the air is not fully recovered, resulting in low recovery efficiency of the acid mist. Utility Model Content

[0004] In view of the above technical problems, the utility model provides an acid mist recovery device for a pickling tank of a cold rolling mill.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A cold rolling mill pickling tank acid mist recovery device, comprising:

[0007] Acid collection tank;

[0008] The acid mist recovery box is fixedly installed on the upper part of the acid liquid collection tank through supporting legs;

[0009] The air inlet pipe and the air exhaust pipe are respectively arranged on the side walls of the acid mist recovery box;

[0010] An induced draft fan is arranged on the side wall of the acid liquid collection tank through a mounting base, and an air suction port of the induced draft fan is connected to an exhaust pipe;

[0011] The acid liquid recovery pipe is arranged at the upper part of the acid liquid collection tank, the inlet end of the pipe is connected to the bottom of the acid mist recovery box, and the outlet end of the pipe is connected to the top of the acid liquid collection tank;

[0012] The acid liquid spraying mechanism is arranged on the top of the acid mist recovery box, the liquid outlet of the mechanism is arranged in the acid mist recovery box, and the liquid inlet is communicated with the acid liquid collection pool.

[0013] A pair of wedge-shaped liquid guide blocks are arranged in the acid mist recovery box, so that the bottom of the inner wall of the acid mist recovery box forms a sloped guide surface on both sides of the inlet end of the acid liquid recovery pipe.

[0014] An arc-shaped filter plate is obliquely arranged in the acid collection tank, the upper part of the arc-shaped filter plate corresponds to the outlet end of the acid recovery pipe, a waste residue discharge pipe is arranged at the tail of the arc-shaped filter plate, the outlet end of the waste residue discharge pipe is arranged outside the acid collection tank, and a fixed externally threaded pipe is arranged on the outlet end, and a sealing cover is installed on the fixed externally threaded pipe.

[0015] A drainage pipe is arranged at one side of the bottom of the acid collection tank, and a first valve is arranged on the drainage pipe.

[0016] The acid spraying mechanism comprises:

[0017] A liquid pump is arranged on the upper part of the acid collection tank;

[0018] A liquid delivery pipe and a liquid extraction pipe, wherein the liquid inlet of the liquid extraction pipe is arranged in the acid liquid collection tank, and the liquid outlet is connected to the inlet end of the liquid extraction pump; the liquid inlet of the liquid delivery pipe is connected to the outlet end of the liquid extraction pump, and the liquid outlet part is arranged on the top of the acid mist recovery box and is connected with a plurality of atomizing nozzles arranged in the acid mist recovery box.

[0019] A second valve is arranged on the liquid outlet portion of the liquid delivery pipe.

[0020] The beneficial effect of the utility model is that the utility model can capture and recover the acid mist in the air by using liquid acid during the flow of acid mist inside the pipeline by arranging an acid mist recovery box, a liquid guide block, an acid liquid recovery pipe, a liquid suction pump, a liquid suction pipe, a liquid delivery pipe, an atomizing nozzle and a second valve, thereby improving the acid mist recovery efficiency of the acid mist recovery device of the cold rolling mill pickling tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 for Figure 1 A magnified view of point A.

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the waste residue discharge pipe and the sealing cover of the utility model.

[0025] In the figure: 1. Acid collection tank; 2. Sealing cover; 3. Waste residue discharge pipe; 4. Mounting bottom plate; 5. induced draft fan; 6. Acid mist recovery box; 7. Acid recovery pipe; 8. Curved filter plate; 9. Liquid extraction pump; 10. Liquid delivery pipe; 11. Air inlet pipe; 12. Liquid guide block; 13. Support leg; 14. Liquid extraction pipe; 15. First valve; 16. Liquid discharge pipe; 17. Second valve; 18. Atomizing nozzle; 19. Fixed external threaded pipe; 20. Air extraction pipe. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] like Figure 1 As shown, an acid mist recovery device for a cold rolling mill pickling tank comprises: an acid liquid collecting tank 1; an acid mist recovery box 6, which is fixedly installed on the upper part of the acid liquid collecting tank 1 through supporting legs 13; an air inlet pipe 11 and an air exhaust pipe 20, which are respectively arranged on the side walls of the acid mist recovery box 6; an induced draft fan 5, which is arranged on the side wall of the acid liquid collecting tank 1 through an installation base plate 4, and the air suction port of the induced draft fan 5 is connected to the air exhaust pipe 20; an acid liquid recovery pipe 7, which is arranged on the upper part of the acid liquid collecting tank 1, and its inlet end is connected to the bottom of the acid mist recovery box 6, and its outlet end is connected to the top of the acid liquid collecting tank 1; an acid liquid spraying mechanism, which is arranged on the top of the acid mist recovery box 6, and its liquid outlet is arranged in the acid mist recovery box 6, and its liquid inlet is connected to the acid liquid collection tank 1.

[0028] like Figure 1 As shown, a pair of wedge-shaped liquid guide blocks 12 are arranged in the acid mist recovery box 6, so that the bottom of the inner wall of the acid mist recovery box 6 forms a sloped guide surface on both sides of the inlet end of the acid liquid recovery pipe 7.

[0029] like Figure 1 and Figure 3 As shown, an arc filter plate 8 is obliquely arranged in the acid collection tank 1, the upper part of the arc filter plate 8 corresponds to the outlet end of the acid recovery pipe 7, a waste residue discharge pipe 3 is arranged at the tail of the arc filter plate 8, the outlet end of the waste residue discharge pipe 3 is arranged outside the acid collection tank 1, and a fixed external threaded pipe 19 is arranged on the outlet end, and a sealing cover 2 is installed on the fixed external threaded pipe 19.

[0030] like Figure 1 As shown, a drain pipe 16 is provided at one side of the bottom of the acid collection tank 1 , and a first valve 15 is provided on the drain pipe 16 .

[0031] like Figure 1 and Figure 2 As shown, the acid liquid spraying mechanism includes: a liquid pump 9, which is arranged on the upper part of the acid liquid collection tank 1; a liquid delivery pipe 10 and a liquid extraction pipe 14, the liquid inlet of the liquid extraction pipe 14 is arranged in the acid liquid collection tank 1, and the liquid outlet is connected to the inlet end of the liquid extraction pump 9; the liquid inlet of the liquid delivery pipe 10 is connected to the outlet end of the liquid extraction pump 9, and the liquid outlet part is arranged on the top of the acid mist recovery box 6, and is connected with a plurality of atomizing nozzles 18 arranged in the acid mist recovery box 6.

[0032] like Figure 2 As shown, a second valve 17 is provided on the liquid outlet portion of the liquid delivery pipe 10 .

[0033] During the specific implementation of the utility model, one end of the air inlet pipe 11 away from the acid mist recovery box 6 is connected to the acid mist gas recovery pipeline. When recovering the acid mist in the acid mist gas, the staff first turns on the induced draft fan 5, and the induced draft fan 5 sucks the gas inside the acid mist recovery box 6 and the air inlet pipe 11 through the exhaust pipe 20, and allows the acid mist gas to enter the interior of the acid mist recovery box 6 through the air inlet pipe 11. At the same time, the staff turns on the liquid extraction pump 9, and the liquid extraction pump 9 sucks the acid liquid stored in the acid liquid collection tank 1 through the liquid extraction pipe 14, and pumps the acid liquid into the acid liquid collection tank 1. The inside of the liquid delivery pipe 10, so that the acid liquid inside the liquid delivery pipe 10 is sprayed out through a plurality of atomizing nozzles 18 installed outside the liquid delivery pipe 10, after these mist-like acid liquids are sprayed inside the acid mist recovery box 6, the acid mist in the acid mist gas introduced into the acid mist recovery box 6 through the air inlet pipe 11 will be captured, and the acid liquid will fall on the liquid guide block 12 under the action of gravity, and enter the inside of the acid liquid recovery pipe 7 through the guidance of the liquid guide block 12, so as to be uniformly recovered into the inside of the acid liquid collection tank 1, thereby completing the acid mist recovery operation in the acid mist gas;

[0034] Through the above technical scheme, the acid mist in the air can be captured and recovered by liquid acid during the flow of acid mist inside the pipeline, thereby improving the acid mist recovery efficiency of the acid mist recovery device of the cold rolling mill pickling tank.

[0035] like Figure 1 and Figure 3 As shown, based on the research and expansion of the above technical solution, the acid mist recovery device of the cold rolling mill pickling tank also includes:

[0036] The arc filter plate 8 is obliquely arranged inside the acid collection tank 1, and a waste residue discharge pipe 3 is connected to one side of the lower side of the arc filter plate 8; and

[0037] The sealing cover 2 is connected to one end of the waste discharge pipe 3, and a fixed external threaded tube 19 is provided on one side of the outer side of the waste discharge pipe 3, and an internal fixed thread is provided inside the sealing cover 2, and the sealing cover 2 is fixedly connected to the outer side of the waste discharge pipe 3 through the cooperation of the internal fixed thread and the fixed external threaded tube 19.

[0038] In the above technical scheme, the acid liquid recovered into the acid liquid collection tank 1 through the acid liquid recovery pipe 7 will first be filtered by the arc filter plate 8 arranged inside the acid liquid collection tank 1, so as to filter the solid waste residue in the recovered acid liquid, and the filtered waste residue will be collected on one side of the upper side of the arc filter plate 8. By setting the waste residue discharge pipe 3 at the lowest position inside the arc filter plate 8, the waste residue collected on the arc filter plate 8 can be uniformly collected into the waste residue discharge pipe 3. Therefore, when it is necessary to clean the waste residue inside the acid liquid collection tank 1, it is only necessary to unscrew the sealing cover 2 from one end of the waste residue discharge pipe 3, which saves time and effort.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cold rolling mill pickling tank acid mist recovery device, characterized in that: include: Acid collection tank (1); The acid mist recovery box (6) is fixedly mounted on the upper part of the acid liquid collection tank (1) via support legs (13); The air inlet pipe (11) and the air exhaust pipe (20) are respectively arranged on the side walls of the acid mist recovery box (6); An induced draft fan (5) is arranged on the side wall of the acid liquid collection tank (1) via a mounting base plate (4), and an air suction port of the induced draft fan (5) is connected to an exhaust pipe (20); An acid liquid recovery pipe (7) is arranged at the upper part of the acid liquid collection tank (1), the inlet end of which is connected to the bottom of the acid mist recovery box (6), and the outlet end of which is connected to the top of the acid liquid collection tank (1); The acid liquid spraying mechanism is arranged on the top of the acid mist recovery box (6), the liquid outlet of the mechanism is arranged in the acid mist recovery box (6), and the liquid inlet is connected to the acid liquid collection pool (1).

2. The acid mist recovery device for a cold rolling mill pickling tank according to claim 1, characterized in that: A pair of wedge-shaped liquid guide blocks (12) are arranged in the acid mist recovery box (6), so that the bottom of the inner wall of the acid mist recovery box (6) forms a sloped guide surface on both sides of the inlet end of the acid liquid recovery pipe (7).

3. The acid mist recovery device for a cold rolling mill pickling tank according to claim 1, characterized in that: An arc-shaped filter plate (8) is obliquely arranged in the acid collection tank (1); the upper portion of the arc-shaped filter plate (8) corresponds to the outlet end of the acid recovery pipe (7); a waste residue discharge pipe (3) is arranged at the tail end of the arc-shaped filter plate (8); the outlet end of the waste residue discharge pipe (3) is arranged outside the acid collection tank (1), and a fixed externally threaded pipe (19) is arranged on the outlet end; a sealing cover (2) is mounted on the fixed externally threaded pipe (19).

4. The acid mist recovery device for a cold rolling mill pickling tank according to claim 1, characterized in that: A drainage pipe (16) is provided on one side of the bottom of the acid collection tank (1), and a first valve (15) is provided on the drainage pipe (16).

5. The acid mist recovery device for a cold rolling mill pickling tank according to claim 1, characterized in that: The acid spraying mechanism comprises: A liquid extraction pump (9) is arranged on the upper part of the acid collection tank (1); A liquid delivery pipe (10) and a liquid extraction pipe (14), wherein the liquid inlet of the liquid extraction pipe (14) is arranged in the acid liquid collection tank (1), and the liquid outlet is connected to the inlet end of the liquid extraction pump (9); the liquid inlet of the liquid delivery pipe (10) is connected to the outlet end of the liquid extraction pump (9), and the liquid outlet is arranged at the top of the acid mist recovery box (6) and is connected to a plurality of atomizing nozzles (18) arranged in the acid mist recovery box (6).

6. The acid mist recovery device for a cold rolling mill pickling tank according to claim 5, characterized in that: A second valve (17) is provided on the liquid outlet portion of the liquid delivery pipe (10).

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