Multiple-effect evaporation system evaporation condensation water heat energy reutilizationoun device

Abstract

The invention discloses a multiple-effect evaporation system evaporation condensation water heat energy reutilizationoun device which comprises a first effect evaporation unit, a second effect evaporation unit and a third effect evaporation unit which are connected in sequence, the first effect evaporation unit is connected with a steam input pipe, the first effect evaporation unit is connected with a feeding groove, a gas phase tube of the third effect evaporation unit is connected to a surface condenser, a crystal slurry tube of the third effect evaporation unit is connected to a centrifuge, evaporation condensate tubes of the second effect evaporation unit, the third effect evaporation unit and the surface condenser are connected to a condensate collection groove, the output end of the condensate collection groove is connected to a preheater, the preheater is connected in series between the first effect evaporation unit and the feeding groove. The multiple-effect evaporation system evaporation condensation water heat energy reutilizationoun device can make full use of waste heat of condensation water, and saves live steam consumption amount of an evaporation crystallization device.

Description

technical field [0001] The invention relates to evaporation and separation equipment, in particular to a device for reusing heat energy of condensed water evaporated in a multi-effect evaporation system. Background technique [0002] Evaporation and crystallization devices are widely used in chemical industry, non-ferrous metal industry, pesticide industry, food industry, pharmaceutical industry, as well as wastewater treatment in ammonia desulfurization, mine smelting, steel mills, oil fields and other industries. Through the recovery of crystals in wastewater, the pure Environmental protection management and standard discharge are deepened into environmental protection management and comprehensive utilization. Not only can the ammonium chloride, potassium chloride, sodium chloride and other crystals in the wastewater be recycled, but also the evaporated water can meet the discharge standards allowed by the state. [0003] In order to improve the utilization rate of steam,...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the utilization rate of steam, a multi-effect evaporation system is generally used, such as a three-effect evaporation crystallization system. In addition to the heat energy of the first effect heater, fresh steam is generally used, and the heat energy of the next few effects comes from the evaporation of the previous effect. The secondary steam generated by evaporation may be relatively pure or may have a high COD content, but they all contain a certain temperature, generally not lower than 60°C. Traditional evaporator technology generally converts the secondary steam generated by evaporation to The condensed water generated after steam heat exchange is discharged at will or sent to the sewage treatment plant, resulting in direct loss of this part of heat energy and not being effectively utilized

Images