Coagulant for industrial wastewater treatment and manufacturing method thereof

Abstract

The invention discloses coagulant for industrial wastewater treatment and a manufacturing method thereof. The coagulant for industrial wastewater treatment is prepared from, by weight, aluminum hydroxide, ferric hydroxide, ferric sulfate, magnesium sulfate, calcium sulfate, poly dimethyl diallyl ammonium chloride, hydrochloric acid, phosphoric acid, polymethylacrylamide, polyethylacrylamide, cationic-type polyacrylamide, starch, sodium carboxymethylcellulose, modified activated carbon and water. The coagulant has the advantages of being efficient, rapid in precipitation, high in adaptability, convenient to operate, low in consumption and the like; raw materials are easy to obtain, the cost performance is high, the coagulant can be industrially produced in a large scale, has the strong condensation effect, and is wide in application range and capable of treating raw water and industrial wastewater of various types; the water treated by the coagulant is stable in chemical property, and normal use is not affected.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a coagulant for industrial wastewater treatment and a preparation method thereof. Background technique [0002] Coagulants are mainly used for the purification of drinking water, industrial wastewater, and the treatment of special water quality (such as oily sewage, printing and dyeing papermaking sewage, smelting sewage, radioactive characteristics, toxic heavy metals such as Pb and Cr, and sewage containing F, etc.). In addition, it is also widely used in precision casting, oil drilling, tanning, metallurgy and papermaking. [0003] Coagulants refer to chemical agents that can bond and aggregate colloidal particles in water during water treatment. Coagulants commonly used in sewage treatment can be roughly divided into three categories: organic coagulants, inorganic coagulants agent and polymer coagulant. Among them, inorganic salt coagulants are widely used in water...

AI Technical Summary

Problems solved by technology

[0004] Aluminum sulfate as a coagulant is convenient to transport, easy to operate, and has good coagulation effect, but when the water temperature is low, aluminum sulfate is difficult to hydrolyze, the flocs formed are loose, and the coagulation effect becomes poor; and if excessive aluminum sulfate is added during use, it will The pH value of the water is lowered below the effective pH value of the aluminum salt coagulation, which not only wastes the medicine, but also makes the treated water confuse.

Due to the high content of insoluble impurities, crude aluminum sulfate has a lot of waste residue during use, which brings troubles in removing waste residue, and is highly corrosive due to high acidity, so the dissolution and dosing equipment should pay attention to anti-corrosion

[0005] The advantage of using ferric chloride as a coagulant is that it is easy to dissolve, and the formed flocs are denser than aluminum salt flocs, and the sedimentation speed is faster. The effect is better than aluminum sulfate when dealing with low temperature and low turbidity water. The dosage is smaller than that of aluminum sulfate; the disadvantage is that the solid product of ferric chloride is easy to absorb water and deliquescence, it is not easy to store, and it is highly corrosive, and it is corrosive to metal, concrete, plastic, etc., and the color after treatment is higher than that of aluminum salt. The water is high, the optimal dosing range is narrow, and it is difficult to control, etc.