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A continuous freezing crystallizer and its method for removing scars

A technology of frozen crystallizers and crystallizers, which is applied in the direction of solution crystallization, etc., and can solve the problems of not having scarring prevention and scarring removal

Active Publication Date: 2021-05-11
丰城赣锋锂业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent does not have the functions of preventing scarring and removing scarring

Method used

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  • A continuous freezing crystallizer and its method for removing scars
  • A continuous freezing crystallizer and its method for removing scars
  • A continuous freezing crystallizer and its method for removing scars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the continuous frozen crystallizer of the present invention includes a crystal grower 100, an external cooler 200, a material circulation system 300, a refrigerant circulation system 400 and a temperature control system;

[0043] The crystal grower 100 comprises a feed mixing section 107, a supernatant liquid settling section 108 and a magma classification section 109 interconnected from top to bottom, and a downcomer 105 is also provided in the crystal grower 100, and the downcomer 105 The upper end communicates with the feed mixing section 107, and the lower end extends into the magma classification section 109 and communicates with the magma classification section 109; the crystal grower 100 is provided with a raw liquid feed port 101, a circulation outlet 102, and a circulation loop. Feed port 103; stoste feed port 101 is arranged on feed mixing section 107, and circulation discharge port 102 is arranged on clear liquid settlement section ...

Embodiment 2

[0050] Such as figure 2 As shown, the continuous frozen crystallizer of the present invention includes a crystal grower 100, an external cooler 200, a material circulation system 300, a refrigerant circulation system 400 and a temperature control system;

[0051] The crystal grower 100 includes a feed mixing section 107, a supernatant liquid settling section 108, and a magma classification section 109 interconnected from top to bottom; Circulation return port 103; stoste feed port 101 is arranged in feed mixing section 107, circulation outlet 102 is arranged in clear liquid settling section 108, and circulation return port 103 is arranged in magma classification section 109; The crystal grower 100 There is also a feed liquid distributor 104, a downcomer 105 and a riser 106 inside; the feed liquid distributor 104 communicates with the raw liquid feed inlet 101, and in this embodiment, the feed liquid distributor 104 is located at Directly above the downcomer 105, and the liqu...

Embodiment 3

[0058] In this embodiment, a salt leg 110 is added on the basis of Embodiment 1 or 2. Specifically, the crystal grower 100 also includes a salt leg 110 connected to the lower end of the magma classification section 109, and the salt leg 110 is provided with a crystal A slurry outlet 111 and an elutriation solution inlet 112 ; in this embodiment, the crystal slurry outlet 111 is located at the upper end of the elutriation solution inlet 112 .

[0059] By setting the salt leg 110, the coarse crystals deposited in the crystal slurry classification section 109 further sink into the salt leg 110, and are discharged through the crystal slurry outlet 111 for solid-liquid separation, and the solid phase obtained by solid-liquid separation is, It is Glauber’s salt product; the mother liquor obtained by solid-liquid separation can be processed in other processes according to the process requirements; it can also be returned to the crystal grower 100 through the top of the crystal grower ...

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Abstract

The invention discloses a continuous freezing crystallizer and a method for removing scars, and relates to the technical field of freezing crystallization devices. The continuous freezing crystallizer includes a crystal grower, an external cooler, a material circulation system, a refrigerant circulation system and a temperature control system The crystal grower is provided with raw liquid inlet, circulation outlet and circulation return outlet; the external cooler is provided with material inlet, material outlet, refrigerant inlet and refrigerant outlet; the material circulation system includes the circulation outlet Material pipe, circulation discharge valve, material circulation pump, circulation return pipe, circulation return valve and regeneration bypass pipe; refrigerant circulation system includes refrigerant circulation pipe, refrigerant circulation pump; temperature control system includes controller connected by electric signal, Material temperature difference sensor and refrigerant temperature difference sensor. The beneficial effect of the invention is that it has better anti-scarring function and fast scarring removal function, and does not need discharge and overall temperature rise during scarring removal, and has the advantages of short use time and low comprehensive energy consumption.

Description

technical field [0001] The invention relates to the technical field of freezing crystallization, in particular to a continuous freezing crystallizer and a method for removing scabs. Background technique [0002] In the sulfuric acid metallurgical process, such as the production of lithium carbonate and lithium hydroxide monohydrate by the spodumene sulfuric acid method, a large amount of sodium sulfate will be produced due to the use of sulfuric acid and soda ash or liquid caustic soda. Whether sodium sulfate can be removed from the product solution with high efficiency and low consumption often affects production capacity and cost. The removal of sodium sulfate often adopts two methods: evaporative crystallization and freezing crystallization. [0003] In the production process of lithium hydroxide monohydrate and other products, the method of freezing and crystallization is often used to obtain a higher primary crystallization rate of sodium sulfate. During the freezing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02
Inventor 李良彬罗光华李广梅彭文革徐建华董飘平彭爱平符龙陶洪符礼冬李芳芳
Owner 丰城赣锋锂业有限公司
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