High-salt wastewater recovery method and high-salt wastewater recovery system
A technology of high-salt wastewater and recovery method is applied in the field of high-salt wastewater recovery and high-salt wastewater recovery system. Effect
Active Publication Date: 2020-06-23
GUANGDONG WENYANG ENVIRONMENTAL TECH CO LTD
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Problems solved by technology
Because miscellaneous salt cannot be recycled, it is generally disposed of in landfill, which does not achieve "zero discharge" in the true sense
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[0032] In order to facilitate the understanding of the present invention, the following will describe the present invention more fully. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.
[0034] The recovery method of high-salt waste water of the present invention is to utilize NaCl and Na 2 SO 4 Solubility of co-saturation at high temperature and Na at very low temperature 2 SO 4 The solubility of NaCl is...
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The invention discloses a method and system for recycling high-salt wastewater. The method for recycling the high-salt wastewater comprises the following steps of: performing evaporation and concentration on the high-salt wastewater, controlling the mass ratio of NaCl to Na2SO4 in to-be-evaporated mother liquor to be not less than 7 during evaporation so as to obtain crystal mush and distilled water after concentration; performing solid-liquid separation on the crystal mush to obtain a NaCl crystal and first mother liquor; cooling the first mother liquor through heat exchange, and performing freeze crystallization to obtain second mother liquor; and performing solid-liquid separation on the second mother liquor to obtain a Na2SO4.10H2O crystal; the system for recycling the high-salt wastewater includes a first heat recovery device, an evaporation crystallization device, a first solid-liquid separation device, a second heat recovery device, a freeze crystallization device and a second solid-liquid separation device. Through the method for recycling the high-salt wastewater, zero discharge of the wastewater can be achieved, and certain economic benefits can be created at the same time; the system for recycling the high-salt wastewater has the advantages of rational design and low energy consumption.
Description
technical field [0001] The invention relates to the technical field of wastewater recovery, in particular to a recovery method of high-salt wastewater and a recovery system of high-salt wastewater. Background technique [0002] The wastewater in the chemical industry mainly contains Cl - , SO 4 2- , Na + , Ca 2+ Plasma, although these ions are essential nutrients for the growth of microorganisms, they play an important role in promoting enzyme reactions, maintaining membrane balance and regulating osmotic pressure during the growth of microorganisms. However, if the concentration of these ions is too high, it will inhibit and poison the microorganisms. The main manifestations are: high salt concentration, high osmotic pressure, dehydration of microbial cells and separation of cell protoplasm. If this kind of wastewater is directly discharged into the environment, it will cause great harm to environmental organisms. [0003] For this kind of wastewater, the current comm...
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IPC IPC(8): C02F1/04C01D3/14C01D3/24C01D5/16
CPCC01D3/14C01D3/24C01D5/16C02F1/04
Inventor 李增王明富
Owner GUANGDONG WENYANG ENVIRONMENTAL TECH CO LTD