Spraying type solution evaporation and concentration method

Abstract

The invention discloses a spraying type solution evaporation and concentration method, belonging to the technical field of solution evaporation and concentration. The solution evaporation and concentration method in the invention comprises the steps of: (1) heating a solution to be concentrated in a heat exchanger to a temperature higher than a boiling temperature; (2) fast evaporating to obtain the solution concentration as required through atomizing dispersion type flash evaporation by a spraying type solution concentration evaporator; (3) carrying out gravity vapor-liquid separation and solution foam capture on the generated secondary vapor, and then carrying out condensation separation by using a surface condenser; (4) removing noncondensable gas by using a vacuum pump; and (5) discharging a finished product from a discharge port on the lower part of the spraying type solution concentration evaporator, and leading the finished product to enter a finished production storage tank. The spraying type solution evaporation and concentration method disclosed by the invention is suitable for evaporating and concentrating various solutions, particularly for evaporating and concentrating materials, such as caustic soda and other various alkali solutions, which have large concentration ratio and large property variation along with the concentration variation.

Description

technical field [0001] The invention discloses a method for solution evaporation and concentration, which belongs to the technical field of solution evaporation concentration. Specifically, the invention relates to a spray type solution flash evaporation concentration method. The spray-type solution evaporation and concentration method of the present invention is suitable for various solution evaporation and concentration, especially for the concentration and evaporation of substances with large concentration ratio and material characteristics that vary greatly with concentration. Background technique [0002] Solution evaporation and concentration often use falling film or rising film evaporation, as well as forced circulation evaporation to evaporate water and concentrate the solution. The falling film or rising film evaporation method has the characteristics of small circulation, low steam consumption, and low power consumption. However, as the concentration of water evap...

AI Technical Summary

Problems solved by technology

In addition, due to the complex structure of the falling film or rising film evaporator and the forced circulation evaporator, the material requirements are high, so the manufacturing cost is high, the floor area is large, and the investment of the evaporation device system is large.

Images