A kind of device and process method for evaporation and concentration process of potassium perchlorate mother liquor

Abstract

The invention discloses a device for a potassium perchlorate mother liquor evaporation and concentration process. The device comprises a water source side circulating water passage and a use side circulating water passage main passage, the water source side circulating water passage sequentially passes through a potassium chloride dissolving tank, a water cooling tower, a water cooling pond, a booster water pump, a sodium chlorate electrolysis intermediate liquid heat exchanger and a water source heat pump evaporator and then returns to the potassium chloride dissolving tank to finish the water passage circulation; the use side circulating water passage main path sequentially passes through a hot water intermediate tank, a hot water intermediate tank pump, a water source heat pump condenser and a potassium perchlorate mother liquor evaporator and then returns to the hot water intermediate tank to finish the water passage circulation; a use side circulating water branch passage for communicating the water source heat pump condenser and the hot water intermediate tank is arranged between the water source heat pump condenser and the hot water intermediate tank; and the water source heat pump evaporator exchanges heat with a water source in the water source heat pump condenser. The process has the characteristics of short flow, low investment, small occupied area and low energy consumption, saves energy by more than 80% compared with the traditional process, and is a new energy-saving and environment-friendly process.

Description

technical field [0001] The invention relates to the field of potassium perchlorate preparation technology, in particular to a device and a process method for the evaporation and concentration process of potassium perchlorate mother liquor. Background technique [0002] Evaporating and concentrating the perchlorate mother liquor, recovering the sodium chloride in it, and using it in the sodium chlorate cell to produce sodium chlorate is a national rigid requirement for the perchlorate industry to meet environmental protection standards. The mother liquor is evaporated using a low-temperature high-vacuum evaporator, and the required heat source is generally obtained from the sodium chlorate cell reactor. Satisfying the heat supply of sodium chlorate evaporation and potassium perchlorate mother liquor evaporation, there is a heat difference of about 30%. The traditional process is: use steam boilers to produce steam or hot water boilers to produce high-temperature hot water as ...

AI Technical Summary

Problems solved by technology

Coal-fired steam furnaces require large investment, occupy a lot of land, have a long process, high energy consumption, and require special equipment; in the investment of electric steam furnaces, they are fully automatic and consume high energy consumption, and require special equipment; High energy consumption; MVR requires large investment, long process, steam is needed for initial start-up, but low energy consumption

There is no evaporation process with short process, low investment, small floor space and low energy consumption

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