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Crystallizer for hydrolyzing carnallite to prepare potassium chloride

A crystallizer and potassium chloride technology, which is applied in the field of salt chemical industry, can solve the problem that the crystallizer cannot fully hydrolyze large-size carnallite, and achieve the effects of reducing raw material and energy consumption, increasing residence time, and extending the flow path

Pending Publication Date: 2019-01-11
北京恩泽佳立科技有限公司
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  • Claims
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Problems solved by technology

[0006] In order to overcome the defect that the existing crystallizer cannot satisfy the sufficient hydrolysis of large-size carnallite, the object of the invention is to provide a crystallizer for hydrolyzing carnallite to produce potassium chloride, which can effectively overcome this defect and improve Crystallizer productivity and KCl recovery

Method used

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  • Crystallizer for hydrolyzing carnallite to prepare potassium chloride
  • Crystallizer for hydrolyzing carnallite to prepare potassium chloride

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Embodiment

[0039] The crystallizer of the present embodiment is as figure 1 As shown, the cylindrical shell 8 of the crystallizer is 8.0m high and 24m in diameter, the upper part of the inner cylinder 2 is 3.0m high, the diameter of the upper port is 16.0m, and the diameter of the lower port is 8.8m. The angle between the extension lines of the sides of the rectangle is 39.8°, and the lower part of the inner tube 2 is a cylindrical structure (the shape of the longitudinal section is rectangular), and its lower part is 2.0m high, 2.0m away from the bottom of the elliptical cone shell of the crystallizer.

[0040] The upper part of the outer cylinder 1 is 3.0m high, the diameter of the upper port is 17.5m, and the diameter of the lower port is 10.5m. The angle between the inverted tapered side of the outer cylinder 1 and the extension line of the rectangular side is 40.6°. Shaped structure (longitudinal cross-sectional shape is rectangular), its lower part is 1.5m high, 2.5m away from the...

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Abstract

The invention provides a crystallizer for hydrolyzing carnallite to prepare potassium chloride. The crystallizer comprises a cylindrical shell, an inner cylinder and an outer cylinder which are coaxial are arranged in the shell, and an annular interlayer is formed between the inner cylinder and the outer cylinder, wherein a plurality of spiral flow guiding plates are arranged in the interlayer atintervals to make a plurality of spiral flow guiding channels formed in the interlayer. The crystallizer is provided with the spiral flow guiding channels, so the flow path of carnallite and a decomposition mother liquor is significantly increased, thereby the residence time is greatly prolonged, and the sufficient hydrolysis of the carnallite, especially large-particle size carnallite, is facilitated; and when the potassium chloride is produced by using the crystallizer, the materials can simultaneously have two modes of full mixed flow and plug flow, so the production efficiency of the crystallizer and the recovery rate of potassium chloride are improved, and the consumption of raw materials and energy in the production process is reduced.

Description

technical field [0001] The invention relates to the technical field of salt chemical industry, in particular to a crystallizer for hydrolyzing carnallite to prepare potassium chloride. Background technique [0002] Potassium chloride is an important potassium fertilizer and an important chemical raw material. In the chemical industry, it can be used to manufacture potassium hydroxide, potassium nitrate, potassium carbonate, potassium silicate, potassium chlorate, potassium permanganate, potassium iodate and other potassium salt series products, or to prepare metal magnesium for electrolytic magnesium chloride. It is widely used in medicine, electroplating, metallurgy, photography and many other industries. [0003] Carnallite ore is composed of potassium, magnesium halide minerals and sodium chloride (KCl MgCl) under natural conditions. 2 ·6H 2 O+NaCl), China, Laos, Thailand, Ethiopia, Eritrea, Congo and other countries in Africa are rich in carnallite ore. The uses of c...

Claims

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Application Information

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IPC IPC(8): B01D9/02C01D3/26C01D3/08
CPCB01D9/004C01D3/08C01D3/26
Inventor 李小松杨旗贺顺丽赵宗申孙志强
Owner 北京恩泽佳立科技有限公司
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