Novel corrosion inhibition dispersing agent

Abstract

The invention discloses a novel corrosion inhibition dispersing agent, and belongs to the field of chemical engineering wastewater treatment. The novel corrosion inhibition dispersing agent is prepared from the following raw materials in parts by weight: 20-30 parts of a biological leavening agent, 15-35 parts of 2-phospho-1,2-4-butane tricarboxylate, 5-15 parts of hydroxyethylidene-1,1-diphosphonic acid (HEDP), 5-15 parts of hydrolytic polymaleic anhydride (PHMA), 5-15 parts of a dirt dispersion agent terpolymer and 60-80 parts of water. The novel corrosion inhibition dispersing agent is applicable to grey water treatment in a coal water slurry gasification technology and various powdered coal gasification technologies, can effectively slow down the influences of scaling and corrosion ofgrey water to production equipment, can reduce emissions, improves the repeated utilization rate of the grey water, and is worth popularizing and applying in the field of chemical engineering wastewater treatment.

Description

technical field [0001] The invention relates to the field of chemical wastewater treatment, in particular to a novel corrosion inhibitor dispersant. Background technique [0002] As an important part of clean coal technology, coal gasification plays a pivotal role, especially Shell gasification technology using dry coal powder as raw material and Texaco gasification technology using coal water slurry as raw material. In coal chemical industry, chemical industry and industrial recycling water industry. The gasification process of coal-water slurry gasification has gradually changed from the original use of high-quality coal to low-quality coal with complex components such as bituminous coal and lignite; the black and gray water circulation system of the gasification device requires a large amount of circulating water to be used as washing gas water. The black ash water system of the gasification device has a wide temperature range (40-300°C), a long residence time at high te...

AI Technical Summary

Problems solved by technology

The black ash water system of the gasification device has a wide temperature range (40-300°C), a long residence time at high temperature, and the residence time in areas above 1500°C is about 30 minutes; a wide range of pressure changes (-0.09-6.5Mpa); a wide range of pH changes (5 ~9); high suspended solids in black ash water; high content of calcium, magnesium, and silicon ions; large flow rate changes, these factors together lead to different deposition and fouling tendencies in various parts of the system, and it is difficult to control fine slag deposition and CaC0 3 , MgCO 3 deposition

And in the face of environmental protection requirements, the sewage discharge of many coal chemical enterprises is greatly limited, and the concentration multiple of the water system is constantly increasing, which makes the system with harsh water quality and environment worse, and is more prone to fouling. When the fouling is serious, it will affect the normal operation of the equipment.

[0003] At home and abroad, in-depth research has been carried out on the treatment agents for circulating water in the coal chemical industry, from the earlier chromium-based, phosphorus-based, and molybdenum-based treatment agents to organic phosphonic acid-based treatment agents, but due to the chromium-based, phosphorus-based, and molybdenum-based The compounds containing chromium, phosphorus, etc. in them are harmful to the human body. For example, hexavalent chromate and nitrite are toxic substances, so their application is greatly restricted; organic phosphonic acid treatment agents can solve the problem of system Problems such as corrosion and calcium carbonate scaling during operation, but under harsh water quality conditions, water quality treatment cannot be completed only with organic phosphonic acid treatment agents

At the same time, a large amount of phosphorus-containing compounds will be discharged, forming new pollution, and excess zinc salts will also cause certain impacts; copolymer scale inhibitors and dispersants are new types of water treatment agents developed in recent years, and their phosphorus-free formula will not Cause secondary pollution, but because the type and content of the components do not completely match, so the treatment of some harsh water quality is not ideal