A kind of anti-rust paint prepared by using blue carbon wastewater and its preparation method

Abstract

The invention relates to a method for preparing an antirust coating with semi coke waste water. The method includes the specific steps that the semi coke waste water, industrial methanal and curing agents are put into a reaction kettle, heat carried by the semi coke waste water serves as a heat source, and the mixture is reacted for one to two hours in a heat preservation mode; under the stirring effect, polyvinyl alcohol, antirust agents and carboxymethyl cellulose sodium are added, and the mixture is reacted for two hours in a heat preservation mode; after the reaction is completed, the materials are put into a high-speed stirring machine, mica powder, kaolin and antifoaming agents are added, and stirring is continued for three to six hours; then primarily-generated materials are grinded through a colloid mill for one to two hours, and the antirust coating is obtained. By means of the method, phenols compounds and ammonia nitrogen compounds in the semi coke waste water are sufficiently recycled, and economic benefits are created for an enterprise while the waste water is processed; the antirust coating prepared with the method is long in service life, convenient to use, low in cost, resistant to the high temperature and capable of being used for antirust processing of ships, mechanical equipment, pipes and the like.

Description

technical field [0001] The invention relates to an anti-rust paint prepared by using blue charcoal wastewater and a preparation method thereof, belonging to the technical field of paint. Background technique [0002] Semi-coke wastewater is the wastewater produced during the process of producing semi-coke, coal tar and coke oven gas during coal dry distillation at medium and low temperatures (about 650°C). Toxic and harmful substances such as chemical compounds and ammonia nitrogen. Semi-coke wastewater has COD as high as 15,000 to 50,000 mg / L, ammonia nitrogen content as high as 2,000 to 5,000 mg / L, and phenolic content as high as 3,000 mg / L. It has poor biochemical properties and is difficult to treat. It is a typical high-concentration, refractory biodegradable industrial wastewater . [0003] At present, methods such as oxidation, biochemical, and extraction are mainly used to treat semi-coke wastewater. None of these methods recycles phenols and ammonia nitrogen compo...

AI Technical Summary

Problems solved by technology

[0003] At present, methods such as oxidation, biochemical, and extraction are mainly used to treat semi-coke wastewater. None of these methods recycles phenols and ammonia-nitrogen compounds in wastewater, which not only causes waste of resources but also pollutes the environment.

The current method of treating semi-coke wastewater has shortcomings such as high investment cost, complicated operation, and substandard discharge water quality, which is not suitable for industrial promotion

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