Pipeline filtering device in front of waste acid pump on pickling and rolling line

Abstract

The utility model relates to a pipeline filtering device in front of a waste acid pump on a pickling and rolling line, which comprises a barrel and a filtering plate, and the side wall of the barrel is horizontally communicated with a liquid inlet pipe and a liquid outlet pipe; the filter plate is vertically arranged in the cylinder body, and a plurality of filter holes are formed in the filter plate. Waste acid in front of the waste acid pump can be filtered through the barrel and the filter plate, large impurities in the waste acid are prevented from entering the waste acid pump to damage equipment, and the barrel is small in size and does not occupy space.

Description

Technical Field

[0001] This utility model belongs to the field of steel pickling technology, and specifically relates to a filter device for the pipeline before the waste acid pump in a pickling line. Background Technology

[0002] Cold-rolled strip steel requires pickling during production to remove rust from the steel surface using acidic substances. The pickling solution contains a large number of metallic impurities. To protect the environment and reduce costs, the discharged waste acid needs to be recycled and reused. The waste acid is pumped to an acid regeneration device for regeneration. However, during use, the waste acid pump and pipeline may be frequently blocked by large impurities in the waste acid, such as the rubber of the squeeze roller, leading to abnormal waste acid discharge and frequent disassembly of the waste acid pump by personnel, resulting in abnormal damage to pump spare parts. Utility Model Content

[0003] The purpose of this utility model is to provide a pipeline filtration device for waste acid pumps in acid rolling lines, which can filter waste acid before the waste acid pump.

[0004] To achieve the above objectives, the present invention provides a pre-pump pipeline filtration device for waste acid in a pickling line, comprising a cylinder and a filter plate.

[0005] The cylinder has a horizontally connected inlet pipe and an outlet pipe on its side wall, wherein the outlet pipe is connected to the inlet of the waste acid pump through a pipe; the filter plate is vertically installed inside the cylinder and has several filter holes.

[0006] Preferably, two vertical grooves are formed inside the cylinder; the two ends of the filter plate are inserted into the grooves.

[0007] Preferably, reinforcing plates are vertically fixed on both sides of the filter plate; the reinforcing plates are in contact with the inside of the cylinder and are located above the inlet pipe and outlet pipe.

[0008] Preferably, a drain pipe is connected to the bottom of the side wall of the filter plate; the drain pipe is located between the liquid inlet pipe and the filter plate; and a valve is installed on the drain pipe.

[0009] Preferably, the top of the cylinder is connected to a cylinder cover via a flange.

[0010] Preferably, a cleaning pipe is connected to the top of the side wall of the filter plate; the cleaning pipe is disposed between the liquid outlet pipe and the filter plate.

[0011] This utility model provides a pre-pump pipeline filtration device for waste acid in a pickling line, which has the following advantages compared with the prior art:

[0012] (1) The waste acid before the waste acid pump can be filtered through the cylinder and filter plate to prevent large impurities in the waste acid from entering the waste acid pump and damaging the equipment. In addition, the cylinder is small in size and does not take up space.

[0013] (2) The filter plate is set in the slide groove, which makes it easy to disassemble and clean.

[0014] (3) The design is simple and easy to use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the cylinder;

[0017] Figure 3 This is a schematic diagram of the cleaning pipe structure. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 and 2 As shown, the first specific embodiment of this utility model is as follows:

[0020] A filtration device for the pipeline before the waste acid pump in a pickling line includes a cylinder 1 and a filter plate 2.

[0021] The side wall of the cylinder 1 is horizontally connected to an inlet pipe 11 and an outlet pipe 12, which are on the same axis. Both the inlet pipe 11 and the outlet pipe 12 are connected to the inlet of the waste acid pump via flanges or quick-connect fittings. The filter plate 2 is vertically installed inside the cylinder 1 and has several filter holes 21. Large impurities in the waste acid are filtered through the filter holes 21, and the waste acid pressure is reduced. Both the cylinder 1 and the filter plate 2 can be made of acid-resistant PPH material to extend the filtration life. The waste acid first flows into the inlet pipe 11 through the pipe, then enters the cylinder 1. The filter plate 2 filters the waste acid, and the waste acid then flows out from the outlet pipe 12 into the waste acid pump.

[0022] In this embodiment, two vertical grooves 13 are formed inside the cylinder 1; the two ends of the filter plate 2 are inserted into the grooves 13. The grooves 13 facilitate fixing the filter plate 2 and allow the filter plate 2 to be taken out for cleaning and quickly put back into the cylinder 1 at regular intervals.

[0023] In this embodiment, reinforcing plates 22 are vertically fixed on both sides of the filter plate 2; the reinforcing plates 22 are in contact with the inside of the cylinder 1, and the reinforcing plates 22 are above the inlet pipe 11 and the outlet pipe 12. The reinforcing plates 22 can be welded to the filter plate 2 or integrally formed. The filter plate 2 is reinforced and fixed by the reinforcing plates 22 without affecting the flow of waste acid and filtration.

[0024] In this embodiment, a drain pipe 14 is connected to the bottom of the side wall of the filter plate 2; the drain pipe 14 is located between the liquid inlet pipe 11 and the filter plate 2, and large impurities blocked by the filter plate 2 are discharged through the drain pipe 14; a valve is installed on the drain pipe 14, and the drain pipe 14 is opened or closed by the valve. When the liquid inlet pipe 11 stops feeding liquid, the valve is opened, and the waste acid and large impurities below the liquid outlet pipe 12 in the cylinder 1 are discharged from the drain pipe 14.

[0025] In this embodiment, the top of the cylinder 1 is connected to a cylinder cover 15 via a flange. The cylinder cover 15 prevents waste acid from splashing out during flow. When it is necessary to clean the filter plate 2, the cylinder cover 15 is removed and the filter plate 2 is taken out for cleaning.

[0026] like Figure 3 As shown, the second specific embodiment of this utility model is as follows:

[0027] The top of the side wall of the filter plate 2 is connected to a cleaning pipe 16. The cleaning pipe 16 is located between the liquid outlet pipe 12 and the filter plate 2. The inner wall of the cylinder 1 and the filter plate 2 are cleaned through the cleaning pipe 16. The cleaning pipe 16 is connected to an external water source. When the liquid inlet pipe 11 stops supplying liquid, the external water source supplies cleaning water to the cleaning pipe 16. At the same time, the drain pipe 14 valve is opened. The cleaning water backwashes the filter plate 2 and cleans the inner wall of the cylinder 1. The cleaning water, residual waste acid and large impurities flow out with the drain pipe 14. Other features are the same as in the first specific embodiment.

Claims

1. A filtration device for the pipeline before the waste acid pump in a pickling line, characterized in that, Includes a cylinder (1) and a filter plate (2), The side wall of the cylinder (1) is horizontally connected to an inlet pipe (11) and an outlet pipe (12); the filter plate (2) is vertically installed inside the cylinder (1), and a number of filter holes (21) are opened on the filter plate (2).

2. The filtration device for the pre-pump pipeline of waste acid in the pickling line according to claim 1, characterized in that, The cylinder (1) has two vertically oriented grooves (13) inside; the two ends of the filter plate (2) are inserted into the grooves (13).

3. The filtration device for the pre-pump pipeline of waste acid in the pickling line according to claim 1, characterized in that, The filter plate (2) is vertically fixed with reinforcing plates (22) on both sides; the reinforcing plates (22) are in contact with the inside of the cylinder (1), and the reinforcing plates (22) are above the inlet pipe (11) and the outlet pipe (12).

4. The filtration device for the pre-pump pipeline of waste acid in the pickling line according to claim 1, characterized in that, The bottom of the side wall of the filter plate (2) is connected to a drain pipe (14); the drain pipe (14) is located between the liquid inlet pipe (11) and the filter plate (2); a valve is installed on the drain pipe (14).

5. The filtration device for the pre-pump pipeline of waste acid in the pickling line according to claim 1, characterized in that, The top of the cylinder (1) is connected to a cylinder cover (15) via a flange.

6. The filtration device for the pre-pump pipeline of waste acid in the pickling line according to claim 1, characterized in that, The top of the side wall of the filter plate (2) is connected to a cleaning pipe (16); the cleaning pipe (16) is located between the liquid outlet pipe (12) and the filter plate (2).

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