Multifunctional energy-saving type continuous wastewater evaporative crystallization process and device

Abstract

The invention discloses a multifunctional energy-saving type continuous wastewater evaporative crystallization process. The process includes the step A of first-stage preheating of wastewater, the step B of second-stage preheating of wastewater, the step C of triple-effect heating of wastewater, the step D of triple-effect separation of wastewater, the step E of vapor condensation, the step F of forced circulation and two-effect heating of wastewater, the step G of two-effect separation of wastewater, the step H of cyclic utilization of two-effect vapor, the step I of forced circulation and one-effect heating of wastewater, the step J of one-effect separation of wastewater, the step K of cyclic utilization of one-effect vapor, the step L of recovery of vapor condensate, the step M of discharged of non-condensable gas, the step N of forced circulation and crystallization of wastewater, the step O of centrifugal separation and the step P of sewage discharge and secondary circulation of wastewater. Corresponding adjustment can be conduced according to the properties and boiling points of wastewater, conditions required by users, concentration changes of material crystallization and the like, and therefore optimization of the effective number and the minimization of the heat exchange area are achieved, and the evaporation intensity is improved to the maximum.

Description

【Technical field】 [0001] The invention relates to the technical field of environmental protection, in particular to the technical field of a multifunctional energy-saving waste water continuous evaporation crystallization process and equipment. 【Background technique】 [0002] With the shortage of water resources and the increasingly serious environmental pollution, the demand for zero discharge of wastewater is increasing day by day. Since high-salt wastewater is usually accompanied by high suspended solids, high organic matter and heavy metals, and sometimes even petroleum substances, the current membrane treatment system can only realize wastewater concentration treatment and reuse, but cannot achieve zero discharge. The existing wastewater evaporation and crystallization technology Generally, corresponding adjustments cannot be made according to the nature of wastewater, the level of boiling point, the conditions required by users, and the concentration change of material...

AI Technical Summary

Problems solved by technology

Since high-salt wastewater is usually accompanied by high suspended solids, high organic matter and heavy metals, and sometimes even petroleum substances, the current membrane treatment system can only realize wastewater concentration treatment and reuse, but cannot achieve zero discharge. The existing wastewater evaporation and crystallization technology Generally, corresponding adjustments cannot be made according to the nature of wastewater, the level of boiling point, the conditions required by users, and the concentration change of material crystallization, so it cannot meet the requirements of different regions, working conditions, and water quality and quantity.

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