CN105220213A - Neutral salt electrolysis groove - Google Patents

Abstract

The invention discloses a neutral salt electrolytic cell, which comprises a cell body and a cell cover. Squeezing rollers are arranged on both sides of the cell body, a plurality of protrusions are arranged at the bottom of the cell body, and a plurality of immersion rollers are arranged inside the cell body. The height of the rollers is different; the strip steel is driven by the squeeze roller to move along the immersion roller; multiple electrode plates are arranged on both sides of the steel strip, and the electrode plates are connected to the power supply. The invention can clean the surface of the steel strip in a deeper layer, so that the surface of the produced steel strip is smooth and free of impurities, thereby obtaining a better surface of the steel strip.

Description

Neutral salt electrolyzer

technical field

The invention relates to the field of chemistry, in particular to an electrolytic cell.

Background technique

On the surface of the cold-rolled steel strip of stainless steel, since the oxidation annealing process will generate scale, it is necessary to remove impurities such as scale on the surface of the strip steel; in production practice, a neutral salt electrolytic cell is generally used to solve this technical problem. The usual electrolytic cell structure is a flat-bottomed cell, and the steel strip moves from one end to the other. During this process, the neutral salt (sodium sulfate) solution injected into the cell, the electrode plate, and the strip steel form an electrochemical circuit. , so as to remove impurities such as iron oxide scale on the surface of the strip. The disadvantages of this structure are: on the one hand, due to the large length of the electrolytic cell, a very large space is required; on the other hand, the length of the cell body is limited, and the time for the steel strip to pass through the cell body is relatively short, so the effect is often not good. In order to solve this technical problem, Chinese patent application number 01101288.9, the applicant discloses " a kind of processing device of neutral salt electrolyte for Co., Ltd. Hitachi Manufacturing Co., Ltd., and this device is the neutral salt solution of electrolyte used in the electrolysis of stainless steel. A treatment device characterized by having a reduction tank for adding a reducing agent to the electrolytic solution; an acid and base supply mechanism for supplying at least one of acid and base to the reduction tank; A reducing agent supply mechanism for supplying a reducing agent; a neutralization tank for adding alkali to the electrolytic solution after adding the reducing agent; a neutralization tank for supplying alkali to the neutralization tank with an alkali supply mechanism and removing The filtering mechanism for the precipitates precipitated in the electrolyte after the addition of alkali, the reducing agent supplied by the reducing agent supply mechanism is hyposulfuric acid, dithionous acid, sulfurous acid, pyrosulfurous acid, pyrosulfuric acid, and thiosulfuric acid , Caroic acid, perpyrosulfuric acid, polythionic acid and dithionous acid at least one or its salt." This patent not only has a complex structure, but also adds many new processes, which obviously increases the production cost.

Contents of the invention

In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide an electrolytic cell with better electrolysis effect, and relatively less occupied space, the specific technical solution is:

A neutral salt electrolytic cell, comprising a cell body and a cell cover, squeeze rollers are arranged on both sides of the cell body, a plurality of protrusions are arranged at the bottom of the cell body, and a plurality of immersion rollers are arranged inside the cell body, and the immersion rollers have different heights The steel strip is driven by the squeeze roller to move along the immersion roller; multiple electrode plates are arranged on both sides of the steel strip, and the electrode plates are connected to the power supply.

The raised part is irregular triangular pyramid.

The tank body is divided into two parts along the moving direction of the steel belt, and a flow regulating plate is arranged at the junction of the two parts.

The bottom plate of the tank is provided with turbulent blades.

The advantages of the present invention are:

Due to the different heights of the immersion rollers, the stroke of the steel strip in the electrolyte is increased; the bottom of the tank is provided with multiple protrusions, and turbulent blades are added to make the neutral salt solution form a local rotation, which is more conducive to neutralization. The uniformity of the salt solution avoids the uneven concentration so that the electrochemical reaction can be carried out better; and the two parts of the tank are set to ensure that the initial violent reaction gradually changes to the later relatively gentle reaction, which improves the steel strip. surface quality.

Description of drawings

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

detailed description

The present invention is specifically described below in conjunction with accompanying drawing, as shown in Figure 1, the present invention comprises tank body 2, tank cover 8, the two sides of tank body 2 are provided with squeezing roller 1, and the bottom of tank body 2 is provided with a plurality of protrusions 3 A plurality of immersion rollers 6 are also arranged inside the tank body 2, and the heights of the immersion rollers 6 are different; the strip steel 7 is driven by the squeeze roller 1 to move along the immersion rollers 6; a plurality of electrode plates 4 are arranged on both sides of the steel strip 7, and the electrodes Board 4 is connected to the power supply.

The raised portion 3 is an irregular triangular pyramid.

The tank body 2 is divided into two parts along the moving direction of the steel belt 7, and a flow regulating plate 9 is arranged at the junction of the two parts.

The bottom plate of the tank body 2 is provided with turbulent blades 5 .

The effect of main part of the present invention is as follows:

Squeeze roller 1: support the transmission of strip steel 7, seal the groove body and squeeze the liquid on the surface of strip steel.

Electrode plate 4: After electrification, it forms an electrochemical circuit with the neutral salt solution in the tank and the steel strip.

Immersion roller 6: to immerse the steel strip in the liquid in the tank.

Protruding part 3 and turbulent blade 5: make the neutral salt solution form a rotating motion in the tank, which facilitates the uniform concentration and improves the reaction efficiency.

The invention can clean the surface of the steel strip in a deeper layer, so that the surface of the produced steel strip is smooth and free of impurities, thereby obtaining a better surface of the steel strip.

Claims (4)

1. a neutral salt electrolysis groove, comprises cell body, groove lid, it is characterized in that: the both sides of cell body arrange squeezing roller, and the bottom of cell body arranges many places lug boss, and cell body inside also arranges multiple submergence roller, and submergence roller height is different; Band steel is driven by squeezing roller and moves along submergence roller; Arrange many places battery lead plate in steel band both sides, described battery lead plate is connected with power supply.

2. neutral salt electrolysis groove according to claim 1, is characterized in that: described lug boss is irregular triangular pyramid type.

3. neutral salt electrolysis groove according to claim 1, it is characterized in that: described cell body is divided into two portions along steel band direction of motion, two-part intersection arranges adjusting-flow board.

4. neutral salt electrolysis groove according to claim 1, is characterized in that: described cell body base plate arranges turbulent blade.