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An ionic membrane salt separation concentration crystallization freeze crystallization salt production device and process

A technology of concentrated crystallization and frozen crystallization, which is applied in the direction of chilled water/sewage treatment, alkali metal sulfite/sulfate purification, water/sewage multi-stage treatment, etc. It can solve the problems of difficult reuse, zero discharge, and high operating costs , low recovery rate and other issues, to achieve the effect of less investment cost, low operating cost, and improved purity and recovery rate

Active Publication Date: 2019-04-12
岳阳锦能环境绿色能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional salt production process is to directly transport the concentrated concentrated water to the crystallization system to obtain miscellaneous salt or to produce different salts by combining evaporation crystallization and freezing crystallization, but miscellaneous salt can only be treated as hazardous waste, and it is difficult to guarantee the treatment of concentrated brine To meet the requirements of reuse and zero discharge, and directly produce salt through evaporation crystallization and freezing crystallization without salt separation, the investment is large, the operating cost is high, the recovery rate is low, and the purity of the obtained salt is low

Method used

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  • An ionic membrane salt separation concentration crystallization freeze crystallization salt production device and process

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0026] Such as figure 1 As shown, the ionic membrane salt separation, concentration, crystallization, freezing and crystallization salt making device of the present invention includes: a monovalent ionic membrane salt separation device 1, a special ionic membrane salt concentration device 2, a forced circulation crystallization unit and a continuous freezing crystallization unit (DTB).

[0027] The monovalent ion membrane salt separation device 1 has a water inlet, a concentrated water outlet and a fresh water outlet.

[0028] The forced circulation crystallization unit includes: a heating heat exchange device 3, whose water inlet is connected to the concentrated water outlet of t...

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Abstract

The invention discloses a device and a process for preparing salt through ionic membrane salt separation, concentration crystallization and freezing crystallization. The device for preparing salt through ionic membrane salt separation, concentration crystallization and freezing crystallization comprises a monovalent ionic membrane salt separation device, a heating and heat exchanging device with a water inlet connected with a concentrated water outlet of the monovalent ionic membrane salt separation device, a concentration crystallization device with a water inlet connected with a water outlet of the heating and heat exchanging device, a special ionic membrane salt concentration device with a water inlet connected with a fresh water outlet of the monovalent ionic membrane salt separation device, a cooling and heat exchanging device with a water inlet connected with a concentrated water outlet of the special ionic membrane salt concentration device as well as a freezing crystallization device with a water inlet connected with a water outlet of the cooling and heat exchanging device. The system recovery rate is increased, the salt separation effect is enhanced, high-purity NaCl crystal salt and mirabilite are obtained according to different qualities, the system is stable and reliable, the operation cost is low, and the investment cost is low.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a device and a process for producing salt by separating salt from concentrated brine, and more specifically, to a device and process for producing salt by ion membrane salt separation, concentration, crystallization, freezing and crystallization. Background technique [0002] The traditional salt production process is to directly transport the concentrated concentrated water to the crystallization system to obtain miscellaneous salt, or to produce different salts through the combination of evaporation crystallization and freezing crystallization, but miscellaneous salt can only be treated as hazardous waste, and it is difficult to guarantee the treatment of concentrated brine To meet the requirements of reuse and zero discharge, and directly produce salt through evaporation crystallization and freezing crystallization without salt separation, the investment is large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F9/14C02F1/44C01D3/14C01D5/16
CPCC01D3/14C01D5/16C02F1/22C02F1/44C02F3/00C02F9/00C02F2301/08
Inventor 马文臣桑华俭甄胜利刘泽军张曼陈望明
Owner 岳阳锦能环境绿色能源有限公司
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