Coagulant for industrial water pretreatment

Abstract

The invention discloses a coagulant for industrial water pretreatment. The coagulant comprises coal-based granular activated carbon and polysilicate ferric aluminum in the mass volume ratio of (2:1)-(12:1); the coal granular activated carbon has the grain size of 0.35-0.45mm and the apparent density of 0.35-0.42; the polysilicate ferric aluminum is oxidizing polysilicate ferric aluminum; the mole ratio of silicon, aluminum and iron in the oxidizing polysilicate ferric aluminum is 1:1.5:2. Compared with the conventional coagulant, the coagulant provided by the invention has the advantages as follows: the coagulant can greatly improve the quality of outlet water, so that the requirement of the quality of inlet water of subsequent water treatment equipment can be completely met; the problems such as a poor coagulating effect caused by slow coagulant hydrolysis speed, multiple intermediate hydrolysis products, small coagulant particle density, and high metal ion content in the outlet water in water treatment application of the conventional aluminum salt, ferric salt and other coagulants can be solved better.

Description

technical field [0001] The invention relates to the technical field of industrial water pretreatment, in particular to a coagulant for industrial water pretreatment. Background technique [0002] Industrial water usually includes process water, boiler water, washing water, and cooling water, but mainly boiler water and cooling water. The water quality requirements of boiler water vary according to the working pressure and temperature of the boiler. No matter what kind of boiler water is used, it has strict restrictions on the hardness of water. Anything that can cause corrosion, scaling and Most or all of the impurities such as dissolved oxygen, soluble silicon dioxide, iron and residual chlorine that cause the phenomenon of soda and water to poison the ion exchange resin should be removed. [0003] The average industrial cooling water consumption accounts for about 67% of the total industrial water consumption, among which the petroleum, chemical and steel industries are t...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a coagulant for industrial water pretreatment in view of the deficiencies of the above-mentioned prior art. The water quality requirements have better solved the problems caused by the slow hydrolysis speed of the coagulant, many hydrolysis intermediate products, small floc particle density, and high content of metal ions in the effluent when conventional aluminum salts, iron salts and other coagulants are used in water treatment. The problem of poor coagulation effect

Images