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MVR wastewater evaporation and concentration system

An evaporative concentration system, wastewater technology, applied in water/sewage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems affecting system efficiency and reliability, blockage of heat exchangers or pipes, etc. , to avoid changes in compressor operating conditions and other operating failures, reduce system energy consumption, and improve applicability and reliability.

Active Publication Date: 2017-01-11
HEFEI GENERAL MACHINERY RES INST
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Problems solved by technology

When the high-salt wastewater is concentrated to near saturation, some inorganic salts often crystallize in the separator of the existing MVR device, causing blockage of heat exchangers or pipelines, affecting system efficiency and reliability

Method used

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  • MVR wastewater evaporation and concentration system

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Embodiment Construction

[0025] Below in conjunction with embodiment technical solution of the present invention is made more specific description:

[0026] The secondary steam and steam mentioned in the text are all steam of water.

[0027] The present invention comprises an evaporator 9 and a separator 10 through which the raw waste water passes sequentially, the evaporator 9 evaporates the raw waste water, the separator 10 separates the water-gas mixture generated in the evaporator 9, and the separator The concentrated waste liquid generated at the bottom of 10 is returned to the separator 10 through the concentrated water pump 6 to realize the circulation flow, and the secondary steam generated in the separator 10 is pressurized by the water vapor compressor 8 and enters the evaporator 9 to form a A heat source for heating the raw wastewater. Wherein the raw waste water is located at the evaporation side of the evaporator 9 , and the secondary steam is located at the condensation side of the evap...

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Abstract

The invention relates to an MVR wastewater evaporation and concentration system which comprises an evaporator for evaporating raw material wastewater and a separator for separating a water-gas mixture generated in the evaporator. Concentrated waste liquid generated in the separator flows back into the separator through a concentrated water pump to realize circulating flow, and secondary steam obtained by separation of the separator after being pressurized by a water steam compressor enters the evaporator to form a heat source for heating the raw material wastewater. The concentrated waste liquid in the separator is ensured to constantly flow through the concentrated pump and ensured to be uniform in concentration, the problems of pipeline blockage and system instability caused by crystallizing in the separator when the raw material wastewater is concentrated to be close to saturated are effectively prevented, and energy consumption of the system is lowered. In addition, heat generated by the system itself is circularly utilized, so that running cost of the system is lowered, and applicability and reliability of an existing MVR evaporation and concentration device are improved.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to an MVR waste water evaporation concentration system. Background technique [0002] Wastewater in petroleum, chemical, pharmaceutical, electroplating and other industries has complex components and huge quantities. Although most water bodies can be discharged up to standard after treatment by biochemical, electrodialysis, reverse osmosis and other methods, the treatment of some high-concentration and refractory industrial wastewater is still a technical issue. Difficulties, the separation and removal of inorganic salts in wastewater by evaporation and crystallization is an ideal technical method. Traditional reactors, single-effect evaporation, and multi-effect evaporation systems all have problems such as high energy consumption, complex equipment, and high wastewater treatment costs. Using MVR technology to treat high-concentration refractory wastewater is a technical direct...

Claims

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Application Information

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IPC IPC(8): C02F1/04
CPCC02F1/041C02F1/048C02F1/06C02F2301/046C02F2303/10C02F2303/14
Inventor 刘广彬赵远扬李连生杨启超王乐舒悦
Owner HEFEI GENERAL MACHINERY RES INST
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