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Salt lake brine evaporation method and equipment thereof, and salt lake brine treatment method by utilizing salt lake brine evaporation method and device thereof

A salt lake brine and treatment method technology, applied in the directions of alkali metal chloride, energy input, etc., can solve the problems of long production cycle, disconnected production process in salt fields, and inability to guarantee the processing process of brine production, so as to improve production efficiency and product yield. The effect of improving the efficiency of halogenation, evaporation rate and brine production, shortening the period of halogenation and salt production

Active Publication Date: 2013-12-04
SALT LAKE & HOT WATER RESOURCE RES DEV CENT CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the previous brine production process mainly provided most of the heat from solar energy, and did not make reasonable and effective use of other resources, the evaporation rate of brine and the efficiency of brine production were generally low, and the production cycle was long. It is less than efficient utilization, and the amount of brine obtained cannot guarantee the subsequent processing process, such as the brine supply demand for the extraction of the target salt lithium carbonate from the salt gradient heat preservation solar pool, which makes the production process of the salt field out of touch, seriously affecting the continuous production efficiency and target salt output

Method used

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  • Salt lake brine evaporation method and equipment thereof, and salt lake brine treatment method by utilizing salt lake brine evaporation method and device thereof
  • Salt lake brine evaporation method and equipment thereof, and salt lake brine treatment method by utilizing salt lake brine evaporation method and device thereof

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Embodiment approach

[0068] As a preferred embodiment of the present invention, it is a salt lake brine evaporation method and equipment, such as figure 1 As shown, the method includes:

[0069] Step 1: Pump the brine from carbonate-type salt lakes (such as Zabuye Salt Lake in Tibet, Dangxung Co Salt Lake, Bangor Lake, etc.) into the frozen pre-drying pool 1, so that the brine will freeze and freeze naturally under low temperature conditions in winter 13 , forming pre-concentrated brine under ice;

[0070] Step 2: After deicing, the pre-concentrated brine is naturally evaporated in the open air, and under the action of solar radiation and wind, Glauber's salt and natron 14 are precipitated from the pre-concentrated brine in advance, thereby obtaining concentrated brine 15 after separating nitrate .

[0071] The above two steps can be carried out chronologically, or they can be naturally evaporated while deicing, and carried out at the same time.

[0072] In order to make full use of solar energ...

Embodiment 1

[0109] (1) Use the carbonate-type brine of Damxung Co Salt Lake in Tibet as the raw material brine, and first pour it into the first-stage frozen pre-drying pool 1 in early winter (October to November). The lighting area of ​​the frozen pre-drying pool 1 is 1000m 2 , It is directly made of clay, and the bottom of the pool and the inner wall of the pool are provided with thermal insulation layers. On the inner surface of the pool, there is also an anti-seepage liner layer laid by black EPDM waterproof membrane.

[0110] The raw brine is 0.6m deep, and the brine is frozen under low temperature conditions in winter (December to March), and ice crystals or thin ice are formed on the surface of the brine. The ice crystals or thin ice are manually removed in time, and the ice is placed in a freshwater pool until the climate warms up. When it is melted into fresh water for other use.

[0111] During this period, the temperature range of the brine in the freezing pre-drying pool 1 i...

Embodiment 2

[0116] Other conditions are the same as in Example 1, except that a salt gradient heat preservation solar pond is also provided, and the salt gradient heat preservation solar pond is directly built from clay, and the lighting area is 100m2 , the depth of the pool is 2.0m, the bottom of the pool and the inner wall of the pool are made of plastic film and thermal insulation materials to form a sandwich structure of thermal insulation layer, and the inner surface of the pool is equipped with high-density polyethylene sprayed canvas as an anti-seepage liner; Heat exchangers are laid at a height of about 0.5m. The high-concentration lithium-rich brine obtained in Example 1 was pumped into the salt gradient heat preservation solar pond, the high-concentration lithium-rich brine was 1.0 m deep, and 0.3 m of fresh water was laid on it.

[0117] The inlet temperature of the geothermal water entering the heat exchange pipe is also 60-70°C, and the outlet temperature of the geothermal wat...

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Abstract

The invention provides a salt lake brine evaporation method and equipment thereof, and a salt lake brine treatment method by utilizing the salt lake brine evaporation method and a device thereof. The salt lake brine evaporation method comprises the following steps: step A: carrying out natural freezing icing of salt lake brine by relying on a low temperature condition, wherein a liquid phase is a pre-concentrated brine; step B: before, during and / or after removing ice, carrying out open-air natural evaporation of the pre-concentrated brine, so as to allow a part of salt in the pre-concentrated brine to be precipitated from the pre-concentrated brine, separating the precipitated salt, and thus obtaining a concentrated brine; and step C: carrying out open-air evaporation and geothermal water heating evaporation of the concentrated brine obtained in the step B at the same time, and thus obtaining a high concentrated brine. Solar energy resources, cold resources and geothermal resources are fully utilized, so that the evaporation velocity of the brine and the brine preparing efficiency are significantly improved.

Description

technical field [0001] The present invention relates to a salt lake brine evaporation method and equipment, and a salt lake brine treatment method and device using the same, in particular to a salt lake brine evaporation method and equipment that can effectively improve the efficiency of carbonate-type salt lake brine evaporation to produce halogen, and A salt lake brine treatment method and device using the same. Background technique [0002] So far, for salt lakes, the classification method proposed by scholars from the former Soviet Union has been used at home and abroad. According to the water chemical composition of salt lake brine, it is divided into three types: carbonate type, sulfate type and chloride type. Among them, the carbonate-type salt lake is the brine containing CO 3 2- and HCO 3 - , without Ca 2+ and Mg 2+ , or Ca 2+ and Mg 2+ Salt lakes with very low content. [0003] There are a large number of salt lakes with rich types distributed in the Tibet...

Claims

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Application Information

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IPC IPC(8): C01D3/06
CPCY02P20/133
Inventor 郑绵平伍倩乜贞卜令忠王云生
Owner SALT LAKE & HOT WATER RESOURCE RES DEV CENT CHINESE ACAD OF GEOLOGICAL SCI
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