Coal chemical industry grey water scale inhibitor

Abstract

The invention discloses a coal chemical industry grey water scale inhibitor, and belongs to the technical field of grey water scale inhibitors. The coal chemical industry grey water scale inhibitor comprises the following components by weight: 10-15 parts of water; 20-35 parts of polyamino polyether methylene phosphonic acid; 32-47 parts of an acrylic acid-2-acrylamide-2-methyl propanesulfonic acid copolymer; 17-28 parts of an acrylic acid-acrylate copolymer; 2-8 parts of a compounding agent; 1-3 parts of a stabilizer; and 2-5 parts of a passivation solution. The scale inhibitor of the invention has the advantages of being stable at high temperature, high in scale inhibition rate and good in corrosion inhibition.

Description

technical field [0001] The application relates to the technical field of gray water scale inhibitors, more specifically, it relates to a coal chemical gray water scale inhibitor. Background technique [0002] In the gray water system of the coal chemical industry, the high-temperature and high-pressure water that has undergone flash evaporation becomes gray water. The gray scale of the gray water system is mainly composed of calcium ions, and the main component is calcium carbonate. The mineral content in the water exceeds the saturation solubility and becomes a supersaturated solution. Calcium ions and carbonate radicals crystallize and form calcium carbonate crystals that adhere to the wall of the vessel to form scale. [0003] Scale inhibitors are a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal eq...

AI Technical Summary

Problems solved by technology

However, in the gray water treatment system of the coal chemical industry, the temperature of the flashed water is usually high, and the conventional gray water scale inhibitor decomposes at a higher temperature, and its scale inhibition rate and corrosion inhibition performance are greatly reduced. The high-temperature section has a large amount of scaling, a large amount of solid deposits, and rapid equipment corrosion. Therefore, there is an urgent need for a scale inhibitor that can be stable, high in scale inhibition rate, and good in corrosion inhibition in the high-temperature ash water section of the coal chemical industry.

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