MVR evaporative concentration and crystallization process for extracting lithium from salt lake brine

A technology of evaporative concentration and salt lake brine, which is applied in the field of MVR evaporative concentration and crystallization process, can solve the problems of high operating cost and high energy consumption in the evaporative concentration section, and achieve the effect of stable system, low operating cost and good controllability of output concentration

Inactive Publication Date: 2017-11-03
BEIJING PUREN MEIHUA ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is, aiming at the problems such as high energy consumption, high operation cost, and high secondary pollution unfavorable to the environment in the evaporation and concentration section of the current lithium extraction process from salt lake brine, several methods of evaporating and concentrating salt lake brine using MVR vapor recompre

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  • MVR evaporative concentration and crystallization process for extracting lithium from salt lake brine
  • MVR evaporative concentration and crystallization process for extracting lithium from salt lake brine
  • MVR evaporative concentration and crystallization process for extracting lithium from salt lake brine

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[0049] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0050] The MVR evaporation concentration crystallization process for extracting lithium from salt lake brine according to the present invention provides several salt lake brine concentration crystallization methods, which can crystallize part of sodium chloride, reduce energy consumption, and reduce operating costs.

[0051] In order to achieve the above object, the MVR evaporation and concentration process of salt lake brine according to the present invention includes three parts: stock solution preheating, MVR evaporation concentration crystallization and MVR vapor compression. The specific implementation method is as follows:

[0052] figure 1 It is a flow chart of the one-stage forced circulation MVR evaporation...

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Abstract

The invention relates to a MVR evaporative concentration and crystallization process for extracting lithium from salt lake brine. The process comprises the following steps: preheating of a stock solution; MVR evaporative concentration and crystallization; and MVR vapor compression. The process employs MVR vapor recompression technology for evaporative concentration of the salt lake brine, and a small number of sodium chloride crystals are precipitated during evaporative concentration, so energy consumption and operation cost are lowered, the technical advancement of the process is improved, and the process overcomes the problem that conventional equipment only concentrates a lithium solution and is incapable of realizing precipitation of high-purity sodium chloride salt crystals in the process of multi-effect evaporation.

Description

technical field [0001] The invention relates to an MVR evaporation concentration and crystallization process for extracting lithium from salt lake brine, in particular to a process for concentrating salt lake brine by using the MVR evaporation concentration crystallization method to extract lithium. Background technique [0002] In recent years, the demand for basic lithium salts has maintained a rapid growth momentum in the fields of new energy vehicles, electric tools, electric bicycles, backup power supplies for communication base stations, and grid energy storage, especially in the field of new energy vehicles. increase. After several years of investment and construction, the development of domestic lithium ore resources, brine resources and lithium mica extraction technology will gradually form a scale. Lithium salt production enterprises will make full use of both domestic and foreign resources, and lithium salt production capacity will be gradually released. To meet ...

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Application Information

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IPC IPC(8): B01D1/00B01D1/26B01D1/28B01D1/04C22B26/12C22B9/02C02F101/10C02F103/08
CPCB01D1/0094B01D1/04B01D1/26B01D1/2803C02F2101/10C02F2103/08C22B9/02C22B26/12Y02P10/20
Inventor 刘建军于东川王晓茵
Owner BEIJING PUREN MEIHUA ENERGY SAVING & ENVIRONMENTAL PROTECTION TECH
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