Preparation method of grey water dispersing agent for coal chemical industry

Abstract

The invention discloses a preparation method of a grey water dispersing agent for coal chemical industry. The preparation method comprises the following working steps: (1) collecting materials: taking a carboxylic acid-sulfonic acid-nonionic terpolymer, sulfonate, polyepoxysuccinic acid, an allyl polyoxyethylene ether / hydroxypropyl acrylate copolymer and hydrolytic polymaleic anhydride; (2) discharging and reacting: preparing a stirring device, keeping the temperature in the stirring device at 40-50 DEG C, and starting stirring; the preparation method comprises the following steps: sequentially adding a carboxylic acid-sulfonic acid-nonionic terpolymer, polyepoxysuccinic acid and an allyl polyoxyethylene ether / hydroxypropyl acrylate copolymer into a reaction kettle, sucking sulfonate into the reaction kettle, stirring for 40-60 minutes, and uniformly mixing; (3) standing: standing for 20-35 minutes, cooling to normal temperature, sampling, and separating out after no precipitate is detected; and (4) filtering: filtering and sub-packaging to obtain a finished product. The grey water dispersing agent has the beneficial effects that the components of the grey water dispersing agent are good in synergism, and the grey water dispersing agent has the characteristics of stable chemical properties, high pressure resistance, high temperature resistance and easiness in storage, is simple and convenient in post-treatment and is harmless to the environment.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a method for configuring a grey water dispersant for coal chemical industry. Background technique [0002] Coal gasification ash water has the characteristics of high temperature, high pressure, high turbidity, high hardness and high alkalinity. Therefore, in the process of its circulating operation, it is easy to produce unfavorable phenomena such as deposition and scaling, which seriously affects the normal and stable operation of coal gasification equipment. ; In order to effectively slow down the impact of gray water scaling on production equipment, reduce the amount of sewage, and improve the reuse rate of gray water, the chemical treatment method of adding gray water dispersant is widely used in the coal gasification gray water treatment process; [0003] At present, anionic surfactants are widely used in the field of coal gasification ash water treatment tec...

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Problems solved by technology

[0003] At present, gray water dispersants with anionic surface active components are widely used in the field of coal gasification gray water treatment process. Dispersants are limited in their ability to disperse and scale inhibitors; gray water dispersants currently on the market are generally composed of organic phosphonic acid, polycarboxylic acid, sulfonate copolymer, hydrolyzed polymaleic anhydride, polyepoxysuccinic acid, polyaspartic acid It is a compound product composed of acid and other components, which can disperse and scale-inhibit suspended particles such as carbonate, sulfate, silicate and hydrated iron oxide; the dosage concentration of these gray water dispersants in coal gasification gray water Higher requirements can make the dispersion and antiscaling performance of coal gasification ash water achieve the ideal effect. If the dosage is low, the required dispersion and antiscaling performance cannot be achieved, thus resulting in higher use costs