System and method for treating industrial water by induced crystallization process

Abstract

The invention provides a system and method for treating industrial water by an induced crystallization process. Principally, the PH value of raw water is increased such that CaCO3 and MgCO3 in the water are saturated, and the saturated CaCO3 and MgCO3 particles are mixed with other fouling in a seed crystal crystallizer, wherein the seed crystal is a material capable of inducing crystallization of CaCO3 and MgCO3, such as iron powder, aluminum oxide, magnesium oxide, dolomite, calcium carbonate, or the like. Then, the CaCO3, MgCO3 and other fouling can crystallize on the crystal seed and grow gradually. The crystal seed that adsorbs the CaCO3, MgCO3 and other fouling settles in an inclined tube or inclined plate sedimentation tank, and the crystal seed is separated from the CaCO3, MgCO3 and other fouling carried by the crystal seed settling at the bottom of the inclined tube or inclined plate sedimentation tank by a crystal seed separator, and then recycled to the crystallizer.

Description

Technical field [0001] The invention relates to the technical field of industrial water treatment, in particular a system and method for treating industrial water by an induced crystallization method. Background technique [0002] Chemical industry, petroleum industry, electric power industry, metallurgical industry, building air-conditioning system and other industries require industrial circulating water to cool the working medium. However, there is no pure water in nature, and natural water is always in contact with the outside world during the cycle of nature. , So the water contains different components and different amounts of impurities, Ca in water 2+ , Mg 2+ Iso metal ions and CO in water 3 2- , HCO 3 - , SO 4 2- , Cl - And NO 3 - When the anions are combined together, when the water is heated, it is easy to form CaCO due to evaporation and concentration. 3 , MgCO 3 , CaSO 4 , MgSO 4 Waiting for scale, while the circulating cooling water system will inevitably fall into d...

AI Technical Summary

Problems solved by technology

The dirt adheres to the heat transfer surface, resulting in low thermal efficiency and blockage of the heat exchanger, which seriously affects the normal operation of the equipment. At the same time, it is accompanied by increased energy consumption, increased maintenance, and increased pollution emissions.

[0003] The commonly used method of adding chemicals to circulating water can prevent scale and sterilize algae to a certain extent, but the added chemicals themselves are also pollutants, causing secondary pollution to the environment

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