Equipment and method for producing inorganic salt with solubility changing along with temperature through cooling crystallization

A technology of cooling crystallization and inorganic salts, applied in the direction of heat exchange cooling crystallization, chemical instruments and methods, selection of crystallization auxiliary conditions, etc., can solve the problems of small and uneven crystals

Pending Publication Date: 2020-03-06
尹博闻
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of too small and uneven crystals often produced in the current cooling crystallization process, and to provide a device and method for producing inorganic salt crystals by

Method used

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  • Equipment and method for producing inorganic salt with solubility changing along with temperature through cooling crystallization
  • Equipment and method for producing inorganic salt with solubility changing along with temperature through cooling crystallization
  • Equipment and method for producing inorganic salt with solubility changing along with temperature through cooling crystallization

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Effect test

Embodiment 1

[0043] Such as figure 1 As shown, the equipment for producing inorganic salts whose solubility varies with temperature by cooling crystallization according to the present invention includes: a crystal nucleation controller 1, a first delivery pump 7, a crystal grower 8, a heat preservation settler 13, and a second delivery pump connected in sequence 12, centrifuge 10 and vibrating drying bed 11, crystal nucleus generation controller 1 comprises: crystal nucleus generation tank 23, the first circulation pipe 4, condenser 2 and vacuum pump 3, one end of the first circulation pipe 4 and crystal nucleus generation tank The side walls of 23 are connected, and the other end of the first circulation pipe 4 stretches into the crystal nucleus generation tank 23 from the bottom end of the crystal nucleus generation tank 23, and stretches into the other end of the first circulation pipe 4 in the crystal nucleus generation tank 23 In the shape of a bell mouth, the height of one end of the...

Embodiment 2

[0053] Embodiment 2 is basically the same as Embodiment 1, and the same part is no longer repeated, and the difference is: as figure 2 Shown, crystal grower 8 comprises the first crystallizer 14, the second crystallizer 17 and the 3rd crystallizer 19 that are connected successively, and the first crystallizer 14, the second crystallizer 17 and the 3rd crystallizer 19 comprise: crystallization tank 9, heat exchanger 16, second circulation pipe 15 and circulation pump 22, the lower end of crystallization tank 9 is connected with the lower end of heat exchanger 16 through second circulation pipe 15 and circulation pump 22, and the upper end of heat exchanger 16 is passed through second The circulation pipe 15 is connected to the upper end of the crystallization tank 9, and a feed port 21 is opened on the second circulation pipe 15 between the circulation pump 22 and the crystallization tank 9, and the discharge pipe 6 passes through the first delivery pump 7 and the first crystal...

Embodiment 3

[0060] Embodiment 3 is basically the same as Embodiment 1, and the same part is no longer repeated, and the difference is: as image 3 Shown, crystal grower 8 comprises: the first crystallizer 14 and the second crystallizer 17 that are connected successively, and the first crystallizer 14 and the second crystallizer 17 comprise: crystallization tank 9, heat exchanger 16, the second circulation pipe 15 and circulation pump 22, the lower end of crystallization tank 9 links to each other with the lower end of heat exchanger 16 by second circulation pipe 15 and circulation pump 22, and the upper end of heat exchanger 16 links to each other with above-mentioned crystallization tank 9 upper ends by second circulation pipe 15, On the second circulation pipe 15 between circulation pump 22 and crystallization tank 9, have feed inlet 21, discharge pipe 6 links to each other with the feed inlet 21 of the first crystallizer 14 by the first transfer pump 7, crystallization tank 9 The upper...

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PUM

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Abstract

The invention discloses equipment for producing an inorganic salt with solubility changing along with temperature through cooling crystallization. The equipment comprises a nucleation controller, a first delivery pump, a crystal growth device, a heat preservation settler, a second delivery pump, a centrifugal machine and a vibration drying bed which are sequentially connected. The nucleation controller comprises a nucleation tank, a first circulating pipe, a condenser and a vacuum pump, wherein one end of the first circulating pipe is connected with the side wall of the nucleation tank; the other end of the first circulating pipe extends into the nucleation tank from the bottom end of the nucleation tank and is horn-mouth-shaped; one end of the first circulating pipe is higher than the other end; a feeding pipe is arranged at the lower end of the first circulating pipe outside the nucleation tank; the sectional area of the first circulating pipe is 3-7 times the sectional area of the feeding pipe; a discharging pipe is installed at the position close to the bottom end of the nucleation tank and connected with the crystal growth device through the first delivery pump; the top end ofthe nucleation tank is sequentially connected with the condenser and the vacuum pump; and the crystal growth device comprises at least two crystallizers which are sequentially connected.

Description

technical field [0001] The present invention relates to a device and method for producing inorganic salt crystals by cooling and crystallizing step by step, first controlling the number of crystal nuclei, and then controlling crystal growth, especially a device and method for producing inorganic salts whose solubility varies with temperature by cooling and crystallization. Background technique [0002] The crystallization process is an effective method for the production of inorganic salts. The usual crystallization methods are divided into two types: evaporation concentration crystallization and cooling crystallization. Cooling crystallization is suitable for substances whose solubility changes significantly with temperature. Many inorganic salts with this characteristic Substances can be produced by cooling crystallization. Such as sodium sulfate, magnesium sulfate heptahydrate, potassium sulfate, magnesium nitrate hexahydrate, potassium chloride, etc. [0003] A common pr...

Claims

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Application Information

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IPC IPC(8): B01D9/02C30B7/08
CPCB01D9/0013B01D9/0022B01D9/0077B01D9/0063B01D9/0036B01D9/005C30B7/08B01D2009/0086
Inventor 尹博闻
Owner 尹博闻
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