CN105983589A - Method for controlling rinse water of cleaning unit - Google Patents

Abstract

The invention provides a method for controlling rinse water of a cleaning unit. A computerized water replenishing control program is created to conduct periodic water replenishing, wherein when the liquid level of a rinse bath is lowered to 73-77%, water is added; when the liquid level is raised to 90-92%, time is delayed for 17-19 minutes, and then water replenishing is stopped, so that demineralized water in a scrubbing water circulating tank and a rinse water circulating tank is completely circulated; and when the liquid level of the rinse water reaches 89-92%, overflowing to a scrubbing segment is conducted. By means of the method, the requirement of surface cleanliness of a cold-rolled sheet can be met completely; consumption of demineralized water and the drainage amount of sewage are effectively reduced; water resources are saved while the sewage treatment amount is reduced; cleaning cost and sewage treatment cost are lowered; and meanwhile, scrubbing water can be used for preparing alkaline liquor of an alkaline bath and an electrolytic bath, and circulation and reutilization of the scrubbing water are achieved.

Description

A kind of cleaning unit washings control method

Technical field

The invention belongs to cold-rolling process field, particularly relate to a kind of control for cold rolling cleaning unit washings Using method.

Background technology

Cold rolling cleaning unit uses the purpose of demineralized water to be to clean dry by the degreasing agent remaining in cold-reduced sheet surface Only, it is to avoid produce defect owing to degreasing agent remains in surface of steel plate at follow-up unit.And this defect is once Produce and then cannot remove, and former contract cannot be paid, therefore lose the biggest.In order to avoid the generation of defect, Add brushing stage and rinsing section when cleaning unit design, clean the degreasing agent remaining in cold-reduced sheet surface. This cleaning is carried out continuously, and pressure and flow to demineralized water have certain requirement.Brushing stage water Electrical conductivity to be less than 1000 μ s/cm, and rinsing section electrical conductivity of water to be less than 100 μ s/cm.By scene Demineralized water service condition finds, demineralized water consumption is very big, and causes substantial amounts of wastewater disposition, adds sewage Treating capacity, and there is the problem that the satisfactory water of part electrical conductivity is also discharged in vain.

Summary of the invention

It is desirable to provide one can save demineralized water, reduce wastewater disposition amount, reduce sewage load and Clean the cleaning unit washings control method of cost.

To this end, the solution that the present invention is taked is:

A kind of cleaning unit washings control method, it is characterised in that method particularly includes:

Establishment computer moisturizing controls program, implementation periodically moisturizing:

When potcher liquid level drops to 73～77%, add water；

When liquid level rises to 90～92%, stop moisturizing after time delay 17～19min, make to scrub water circulating box and drift Demineralized water in wash water circulating box fully circulates；

To brushing stage overflow after washings liquid level reaches 89～92%.

The invention have the benefit that

The present invention can fully meet the requirement of Surface Cleanliness of Cold-rolled Sheet, effectively reduces demineralized water consumption and sewage Outer discharge capacity, while saving water resource, reduces sewage load, reduces and clean cost and sewage disposal expense With, available water of scrubbing prepares alkaline bath and electrolysis bath alkali liquor simultaneously, it is achieved scrub the cycling and reutilization of water.

Detailed description of the invention

The present invention cleans unit washings control method according to the cold-reduced sheet surface residue after scrubbing relatively Few, that rinsing electrical conductivity of water will not quickly rise actual features, by optimizing the addition of potcher demineralized water Technique, amendment computer moisturizing controls program, has changed original moisturizing constantly into periodically water supplementing method.

Embodiment 1:

When potcher liquid level drops to 75%, add water.

When liquid level rises to 90%, after time delay 18min, stop moisturizing, make to scrub water circulating box and circulate with washings Demineralized water in case fully circulates.

To brushing stage overflow after washings liquid level reaches 90%.

Embodiment 2:

When potcher liquid level drops to 77%, add water.

When liquid level rises to 92%, after time delay 17min, stop moisturizing, make to scrub water circulating box and circulate with washings Demineralized water in case fully circulates.

To brushing stage overflow after washings liquid level reaches 92%.

Claims (1)

1. one kind is cleaned unit washings control method, it is characterised in that method particularly includes:

Establishment computer moisturizing controls program, implementation periodically moisturizing:

When potcher liquid level drops to 73～77%, add water；

When liquid level rises to 90～92%, stop moisturizing after time delay 17～19min, make to scrub water circulating box and drift Demineralized water in wash water circulating box fully circulates；

To brushing stage overflow after washings liquid level reaches 89～92%.