Separation system and sodium salt and potassium salt separation method

A separation system, sodium salt technology, applied in the field of separation system and sodium salt and potassium salt separation, can solve the problem of no separation, etc., and achieve the effect of reasonable process steps

Pending Publication Date: 2017-09-22
BEIJING LIULIHE CEMENT +3
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  • Description
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  • Application Information

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Problems solved by technology

[0003] The content of sodium salt in the existing fly ash washing wastewater is higher than that of potassium salt. In actual treatment, the evaporation and crystallization system is used to first separate the crystallization of sodium salt with high content, and then the mother liquor is continuously refluxed to enrich potassium salt. It can only be precipitated after reaching saturation, and what is obtained is a mixed salt of sodium salt and potassium salt, and has not been separated

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  • Separation system and sodium salt and potassium salt separation method
  • Separation system and sodium salt and potassium salt separation method
  • Separation system and sodium salt and potassium salt separation method

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Embodiment 1

[0039] Such as figure 1 As shown, the present embodiment provides a separation system, including successively connected crystallization separation equipment 1, heat preservation and sedimentation equipment 2, cooling crystallization equipment 3 and centrifugal equipment 4;

[0040] The heat preservation and settling equipment 2 is provided with a material inlet 201, a first material outlet 202 and a second material outlet 203, and the material inlet 201 and the first material outlet 202 are all connected to the crystallization separation device 1,

[0041] The second discharge port 203 is connected with the cooling crystallization equipment 3 .

[0042] The above-mentioned separation system includes successively connected crystallization separation equipment 1, heat preservation and sedimentation equipment 2, cooling crystallization equipment 3 and centrifugal equipment 4; the solution containing sodium salt and potassium salt first passes through crystallization separation eq...

Embodiment 2

[0057] The present embodiment provides a method for separating sodium salt and potassium salt. The above-mentioned separation system is used to treat the waste water containing sodium salt and potassium salt. The separation method includes the following steps:

[0058] (a) the waste water containing sodium salt and potassium salt flows to the above-mentioned crystallization separation equipment place to carry out the crystallization separation of sodium salt to obtain sodium salt crystal and sodium salt mother liquor;

[0059] (b) The sodium salt mother liquor flows to the above-mentioned heat preservation and sedimentation equipment to obtain the sodium salt magma and the first supernatant, and the sodium salt magma returns to the above-mentioned crystallization and separation equipment through the above-mentioned first discharge port to carry out the crystallization and separation of the sodium salt again ;

[0060] (c) The first supernatant liquid flows to the above-mention...

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Abstract

The present invention relates to the field of high salt wastewater treatment, particularly to a separation system and a sodium salt and potassium salt separation method. The separation system comprises a crystallization separation device, a thermal insulation settling device, a cooling crystallization device and a centrifugation device, wherein the crystallization separation device, the thermal insulation settling device, the cooling crystallization device and the centrifugation device are sequentially connected, the thermal insulation settling device is provided with a material inlet, a first material outlet and a second material outlet, the material inlet and the first material outlet are respectively connected to the crystallization separation device, and the second material outlet is connected to the cooling crystallization device. With the separation system of the present invention, the sodium salt and the potassium salt in the solution can be precipitated, and the separated sodium salt crystal and the separated potassium salt crystal can be obtained. The sodium salt and potassium salt separation method of the present invention uses the separation system to treat the wastewater containing the sodium salt and the potassium salt so as to obtain the separated sodium salt crystal and the separated potassium salt crystal.

Description

technical field [0001] The invention relates to the field of high-salt wastewater treatment, in particular to a separation system and a separation method for sodium salt and potassium salt. Background technique [0002] Garbage fly ash refers to the residues collected in the flue gas purification system of waste incineration power plants, and the total amount is about 3-4% of the domestic waste treatment volume. At present, using cement kiln to dispose of fly ash is an effective disposal method, but fly ash contains a large amount of chlorine, sodium oxide and potassium oxide, which are harmful substances for cement kilns. Studies have shown that washing fly ash with water Can reduce the hazards of chlorine, sodium oxide and potassium oxide mentioned above. The wastewater produced by fly ash washing is a very complex multi-component high-salt wastewater. Its evaporation crystallization is far more complicated than the single-component inorganic salt (such as NaCl, KCl) crys...

Claims

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Application Information

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IPC IPC(8): C01D3/14
CPCC01D3/14C01P2006/80
Inventor 黄岚张仂张国亮赵靖朱延臣张磊位百勇李长勤阴琴刘宾
Owner BEIJING LIULIHE CEMENT
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