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Crystallization system and working method for butanol spray flash extraction of NaCl aqueous solution

An aqueous solution and flash evaporation technology, applied in solution crystallization, extraction water/sewage treatment, evaporation separation crystallization, etc., can solve the problems of small steam evaporation ratio, large energy consumption ratio of flash evaporation, and excessive latent heat of droplet vaporization, etc. The effect of low energy consumption and high efficiency heat exchange

Active Publication Date: 2020-02-11
XI AN JIAOTONG UNIV
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Problems solved by technology

In the traditional jet flash evaporation of NaCl solution, the flash energy consumption ratio is large and the steam evaporation ratio is small. The mother liquor needs multiple cycles to achieve flash evaporation. Insufficient, and the precipitated crystals cannot be completely separated from the mother liquor

Method used

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  • Crystallization system and working method for butanol spray flash extraction of NaCl aqueous solution

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1As shown, the present invention is a crystallization system for butanol jet flash extraction of NaCl aqueous solution, comprising a jet heat exchange tank 1, the jet heat exchange tank 1 includes a tank body 1-4, and is arranged on the tank body 1-4 from top to bottom. 4, the constant temperature filter screen 1-1, the spray nozzle 1-3 and the spray nozzle 1-5 spray down the NaCl aqueous solution in the waste liquid pool 19 through the spray nozzle 1-3 after pressurized heating, and the circulating liquid The butanol liquid in the pool 8 is pressurized and heated to overheating and then sprayed upward through the spray nozzle 1-5, and the spray nozzle 1-3 is connected with the side outlet of the heat exchanger 13 outside the tank through the water inlet pipe 1-2, and the heat exchange tank is sprayed 1 A thermo...

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Abstract

Disclosed is a crystallization system for butanol spray flash extraction of a NaCl aqueous solution. According to the crystallization system, the extraction liquid, butanol, absorbs heat in form of internal circulation and heats the NaCl aqueous solution to realize crystallization and solid-liquid separation of the NaCl aqueous solution, high-efficiency heat exchange is achieved by direct contactbetween a gas phase and a liquid phase through the spray flash evaporation, the butanol and water can be separated in different phase forms at one time after heat exchange, and extraction is simultaneously completed. According to the crystallization system, after the butanol is sprayed and flashed, the NaCl aqueous solution is thoroughly subjected to high-efficiency liquid-solid separation and water resource reuse in an internal circulation extraction mode. The crystallization system provides important ideas for industrial wastewater treatment and crystallization technology.

Description

technical field [0001] The invention belongs to the technical field of extraction and crystallization of an aqueous solution of inorganic salts, and in particular relates to a crystallization system and a working method for butanol jet flash extraction of an aqueous NaCl solution. Background technique [0002] Achieving high-efficiency desalination of NaCl solution is a key process link in industrial fields such as seawater desalination, efficient wastewater treatment and recovery, etc. Raw water such as seawater and industrial wastewater can generally be regarded as an aqueous solution of NaCl after pretreatment. There are two methods for concentrating NaCl solution: membrane method and thermal method. The traditional thermal method and membrane method are only suitable for concentrating low-concentration NaCl solution. When the solution reaches quasi-saturation, if it is further concentrated, crystals will precipitate out. The precipitated crystals can not only block the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/06C02F1/10C02F1/26C01D3/14C01D3/06B01D11/04B01D9/02
CPCB01D9/0018B01D9/0027B01D11/04C01D3/06C01D3/14C02F1/043C02F1/048C02F1/06C02F1/10C02F1/265
Inventor 张丹王辉辉赵舒然韩小渠刘继平
Owner XI AN JIAOTONG UNIV
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