CN211836592U

CN211836592U - Rinsing water cleaning device of pickling equipment

Info

Publication number: CN211836592U
Application number: CN201921957004.3U
Authority: CN
Inventors: 周文宾; 张云江; 斯日古楞
Original assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Current assignee: Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-11-03
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a rinsing water cleaning device of pickling installation belongs to the pickling installation field, and the rinsing water of having solved the pickling installation is polluted by silt and is leaded to taking the problem that the steel sheet face produced dirty defect. The technical scheme of the utility model is that: filter screens are arranged on four side walls of a rinsing tank water return port of the pickling equipment, and gaps are reserved between the upper ends of the filter screens and the top of the rinsing tank water return port. The utility model discloses can effectively block dirty entering into rinsing aquatic once more such as silt, realize the clean liquid circulation and spray, avoid rinsing aquatic to mix with silt and cause the influence to the strip steel face, solve the dirty defect of strip steel face after the pickling. A gap is reserved between the upper end of the filter screen and the top of the water return port of the rinsing tank, so that the influence on the rinsing water circulation after the filter screen is blocked can be avoided.

Description

Rinsing water cleaning device of pickling equipment

Technical Field

The utility model belongs to the pickling line field, concretely relates to rinsing water cleaning device of pickling line.

Background

The acid tank inlet and outlet jet acid liquor against the running direction of the strip steel to form turbulent flow, and the bottom blocking stone and the upper blocking roller of the acid tank obviously damage the laminar flow layer on the surface of the strip steel, so that strong turbulent flow is formed in the acid tank. The rinsing section of the shallow groove turbulent pickling line of Mitsubishi Hitachi is provided with four rinsing tanks, the three pickling tanks carry out cascade countercurrent pickling, iron scales on the surface of the strip steel are removed through chemical reaction, and then the residual acid liquor is cleaned through four-stage rinsing. Fresh water is supplemented in the fourth tank, the rinsing water overflows from the fourth tank to the first tank in a cascade overflow mode, and the rinsing water is recycled in the first tank through a water return port.

Along with the extension of production time, the easy deposit silt of potcher bottom, the silt of a tank bottom deposit gets into rinsing water circulation system through retrieving the mouth, causes the interior water quality of potcher muddy, takes the steel sheet face to produce dirty defect after the pickling.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rinsing water cleaning device of pickling installation to the rinsing water of solving pickling installation is polluted by silt and is leaded to taking the problem that the steel sheet face produced dirty defect.

The technical scheme of the utility model is that: the utility model provides a rinsing water cleaning device of pickling installation, is equipped with the filter screen at four lateral walls of the potcher return water mouth of pickling installation, leaves the space between the upper end of filter screen and the top of potcher return water mouth.

As a further improvement of the utility model, the filter screen is made of PVDF material.

As a further improvement of the utility model, the distance between the upper end of the filter screen and the top of the rinsing groove return water port is 10-30% of the height of the rinsing groove return water port.

As a further improvement of the utility model, the distance between the upper end of the filter screen and the top of the rinsing groove return water port is 20 percent of the height of the rinsing groove return water port.

As a further improvement of the utility model, the mesh number of the filter screen is 40-80 meshes.

The utility model has the advantages that: the utility model discloses an avoid rinsing water that rinsing groove inner loop used to be sprayed on belted steel surface after being polluted, utilize the characteristics of the heavy deposit of silt impurity proportion at the tank bottom, four lateral walls at rinsing groove return water mouth 1 of pickling equipment set up the filter screen, can effectively block dirty reentrant rinsing water such as silt, realize the clear liquid circulation and spray, avoid rinsing water to mix with silt and cause the influence to the steel sheet face, solve the dirty defect of pickling back area steel sheet face. A gap is reserved between the upper end of the filter screen and the top of the water return port of the rinsing tank, so that the influence on the rinsing water circulation after the filter screen is blocked can be avoided. According to the height of the water level and the water pressure in the rinsing tank, the height and the filtering mesh number of the four-wall filtering net are reasonably designed, and the water level balance of rinsing water is guaranteed. The filter screen is made of PVDF material and has strong acid corrosion resistance. The utility model discloses simple easy realization does not destroy existing equipment, does not influence normal production, and the effect is showing.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1-a water return port of a rinsing tank; 2, filtering a screen; 3-water inlet holes; 4-water outlet.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, a rinsing water cleaning apparatus of a pickling apparatus is characterized in that: four side walls of a rinsing tank water return port 1 of the pickling equipment are provided with filter screens 2, and gaps are reserved between the upper ends of the filter screens 2 and the top of the rinsing tank water return port 1.

The filter screen 2 is made of PVDF material.

The distance between the upper end of the filter screen 2 and the top of the rinsing groove water return port 1 is 10-30% of the height of the rinsing groove water return port 1.

The distance between the upper end of the filter screen 2 and the top of the rinsing groove water return port 1 is 20% of the height of the rinsing groove water return port 1.

The mesh number of the filter screen 2 is 40-80 meshes.

The rinsing groove return water mouth 1 is the cuboid structure, as shown in fig. 1, and the top and four lateral walls of cuboid all are equipped with into water hole 3, and the bottom is equipped with delivery port 4.

PVDF filter screens 2 with filtering meshes of 40-80 meshes are selected and installed on four side walls of a rinsing tank water return port 1, so that when rinsing water enters water inlet holes 3 in the side walls, sludge can be filtered through the filter screens 2. For guaranteeing rinsing water circulation system flow balance, leave the space between the upper end of filter screen 2 and the top of rinsing groove return water mouth 1, mainly deposit in the bottom because of the silt in the rinsing groove, the rinsing groove circulates with cascade overflow mode, and silt is difficult to stir through rivers and reachs 1 tops of rinsing groove return water mouth. The utility model discloses a large amount of clean rinsing water is retrieved through 1 top of rinsing groove return water mouth, and partial dirty liquid filters through filter screen 2, has both guaranteed the rinsing water cleanliness factor of recycling, can avoid again that filter screen 2 blocks up the back and influence the rinsing water circulation.

The utility model discloses, the surface quality of pickling board obviously improves through using in certain steel mill, and the dirty defect of cold rolling pickling board face has obtained effective control, and dirty defect proportion reduces to 0.15 from 2.46%.

The utility model discloses utilize acidproof PVDF material filter screen, choose for use suitable filtration mesh number, will get into the 1 endless quality of water of rinsing groove return water mouth and filter, guaranteed the cleanliness factor of rinsing hydrologic cycle quality of water.

Claims

1. A rinsing water cleaning device of a pickling device is characterized in that: four side walls of a rinsing tank water return port (1) of the acid washing equipment are provided with filter screens (2), and gaps are reserved between the upper ends of the filter screens (2) and the top of the rinsing tank water return port (1).

2. The rinse water cleaning apparatus of an acid pickling plant according to claim 1, characterized in that: the filter screen (2) is made of PVDF material.

3. The rinse water cleaning apparatus of an acid pickling plant according to claim 1 or 2, characterized in that: the distance between the upper end of the filter screen (2) and the top of the rinsing tank water return port (1) is 10-30% of the height of the rinsing tank water return port (1).

4. The rinse water cleaning apparatus of an acid pickling plant according to claim 3, characterized in that: the distance between the upper end of the filter screen (2) and the top of the rinsing tank water return port (1) is 20% of the height of the rinsing tank water return port (1).

5. The rinse water cleaning apparatus of an acid pickling plant according to claim 4, characterized in that: the mesh number of the filter screen (2) is 40-80 meshes.