Self-cleaning high-salt wastewater evaporative crystallization device

Abstract

The invention relates to a self-cleaning high-salt wastewater evaporative crystallization device. The evaporative crystallization device comprises a heater (1), an injection pump (3), a self-cleaning medium (4), a solid-liquid separating chamber (5), an evaporative crystallization chamber (6), a steam compressor (7), a strong brine pump (8) and a material water pump (9). By adopting the evaporative crystallization device, because the self-cleaning medium flows continuously in a heat transfer pipe of the heater and rubs and crashes the inner wall of the heat transfer pipe continuously, the dirt deposited on the inner wall of the heat transfer pipe is peeled off, and the self-cleaning medium is drained out of a heating chamber together with the material water, and thus the purpose of self-cleaning of the device is achieved; with the adoption of the evaporative crystallization device, the problem of scaling of the heat transfer pipe can be solved, and thus the heat transfer deterioration of the heat transfer pipe can be avoided, the heating exchanging property of the heater is enhanced, the usage rate of the wastewater evaporative crystallization device is improved, the work load of on-site maintenance is reduced, the dosage of chemicals is reduced, and meanwhile the pressure of environment pollution is reduced; and the wastewater evaporative crystallization is simple in structure, low in machining and manufacturing cost, and easy and convenient to mount and demount.

Description

technical field [0001] The invention relates to a self-cleaning high-salt sewage evaporation and crystallization device, which belongs to the technical field of high-salt sewage treatment. Background technique [0002] Generally, the high-salt sewage evaporation and crystallization device is composed of a heater, an evaporation crystallization chamber and a circulating pump. Its working principle is: power steam enters the heater to heat the circulating material. After heating, the circulating material flashes and evaporates in the evaporation and crystallization chamber. After the water in the material evaporates, the salt contained in it is concentrated and crystallized beyond the saturation of the device. [0003] Generally, the salt composition in high-salt sewage is complex, and the sewage contains organic matter or other impurities. Such sewage will accumulate dirt on the surface of the heat transfer tube of the heater during the heating and evaporation process. With...

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Problems solved by technology

However, this cannot fundamentally solve the problem of fouling of the heat transfer tubes. During the operation of the evaporation and crystallization device, it still needs to be shut down for mechanical or chemical cleaning, resulting in unnecessary human resource costs and increased production costs.

Waste water or waste gas generated during chemical cleaning will cause secondary pollution to the surrounding environment

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