Emulsion microfiltration circulating system and technology

Abstract

The invention discloses an emulsion microfiltration circulating system and technology. The circulating system comprises a waste liquid storage tank, an oil-separation settling tank, a hydraulic cyclone, a self-cleaning filter and a microfiltration device which are communicated sequentially; the microfiltration device comprises a microfiltration pipe filter, a microfiltration backwashing tank and a backwashing collector, and the microfiltration pipe filter is connected with the microfiltration backwashing tank and the backwashing collector respectively; and slurry collected by the microfiltration device, the self-cleaning filter, the hydraulic cyclone and the waste liquid storage tank is respectively connected with a slurry treatment device respectively through a pipeline, and liquid backwashed and collected by the microfiltration device and liquid obtained through separation of the slurry treatment device return to a liquid inlet of the waste liquid storage tank through a pipeline. According to the emulsion microfiltration circulating system and technology, the problem of purifying emulsion during rolling of steel plates can be effectively solved, the used emulsion can be continuously circulated, filtered and recycled so as to fundamentally achieve no drainage of waste emulsion, the energy-saving and emission-reduction effects can be achieved, and the emulsion microfiltration circulating system and technology are environment-friendly and efficient, and are suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of steel rolling process equipment, and more specifically relates to an emulsion microfiltration circulation system and process. Background technique [0002] During the rolling process of the steel plate, the work rolls of the rolling mill and the strip steel slide in the rolling deformation area to form sliding friction, resulting in a large number of iron powder particles smaller than 30 microns. These iron powder particles not only cause wear to the roll, but also affect the surface quality of the strip. The entire rolling process is carried out with the spraying and lubrication of the emulsion. The iron powder particles generated during the production process will be washed into the emulsion and recycled for further use. If the emulsion filtration system cannot separate well If these iron powders are produced, the iron powder content in the emulsion is too high, which will affect the surface quality of...

AI Technical Summary

Problems solved by technology

The magnetic bar filter has the following disadvantages: 1) The joint surface is not easy to control due to the soft spot (caused by the metal powder in the emulsion) of the work roll, and the magnetic bar is easily deformed or damaged or scraped clean due to the improper linkage mechanism

Repeatedly, forming a vicious circle, it will cause the dirty oil iron powder and ash powder in the dirty oil tank to rise

2) The magnetic bar scraping mechanism is easy to get stuck, causing the large chain of the magnetic bar to be pulled off, causing equipment accidents

3) Due to its insufficient structure and capacity, the effect of filtering iron powder is very poor, resulting in the rise of iron powder and ash powder, causing wear and replacement of work rolls, and greatly increasing the rolling cost of the enterprise

However, when the Hoffman filter is working, due to the insufficient negative pressure of the fan, the filter paper is not suitable for the heavy pollution of the filtered oil, and the filter screen layer cannot be formed, causing the filter to fail, and the oil will overflow, flow into the dirty oil tank, and flow back into the filter. Clean oil tank, forming secondary pollution

As a result, the finished steel plate has black spots, the product is downgraded or becomes a defective product or even a waste product; due to the unsatisfactory filtering effect, the metal powder in the emulsion forms a problem of soft spots on the work roll, resulting in loss and replacement of the work roll, resulting in greater waste

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