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Zinc chloride solution multi-effect evaporation and concentration production process

A technology of zinc chloride solution and production process, applied in the direction of multi-effect evaporation, zinc halide, etc., can solve the problems that the steam cannot be used again, the steam is easy to diffuse, and the consumption is large, so as to achieve short start-up time, short residence time, The effect of short heating time

Pending Publication Date: 2020-12-25
山东瑞琦能源科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] High-grade pure zinc chloride is widely used in the battery industry, pharmaceutical industry, petroleum purifier, etc. At present, the evaporation of zinc chloride solution in China is mostly produced intermittently. The zinc chloride solution is evaporated in a graphite evaporator, and the evaporator uses steam Heating, evaporating to a certain concentration and then drying through the graphite slope dryer. During the drying process, the steam is easy to diffuse, and a steam recovery device needs to be installed above the graphite slope. The steam cannot be reused, and the consumption is large.
The steam generated during the production process contains HCL gas, which is easy to cause environmental pollution

Method used

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  • Zinc chloride solution multi-effect evaporation and concentration production process
  • Zinc chloride solution multi-effect evaporation and concentration production process
  • Zinc chloride solution multi-effect evaporation and concentration production process

Examples

Experimental program
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Effect test

example 1

[0030] Example 1: A kind of zinc chloride solution multi-effect evaporation concentration treatment process

[0031] Such as figure 1 Shown, zinc chloride solution multi-effect evaporation concentration treatment process comprises the following steps:

[0032] (1) During normal operation, the feed liquid with an initial mass concentration of 40% enters the plate heat exchanger 16 through the feed pump 15 for preheating, then is fed from the upper end of the first-effect falling film heating chamber 3, and is evenly distributed to each In the heat exchange tube, it flows down in a uniform film along the inner wall of the heat exchange tube. The liquid film is heated by shell-side steam during the flow process in the tube side of the heating chamber, and the generated steam and part of the liquid phase enter the first-effect separation chamber 4 to complete the vapor-liquid separation, and the secondary steam enters the second-effect falling film heating chamber 6 as a heating ...

Embodiment 2

[0037] Example 2: A zinc chloride solution multi-effect evaporation concentration treatment process

[0038] On the basis of Example 1, such as Figure 2-5 As shown, the upper part of the high-temperature concentration chamber 9 is provided with a material distributor 17, and the distributor 17 includes an upper distribution plate 17-5, a lower distribution plate 17-7, a distance pipe A 17-9, a distance pipe B 17-15, a poly The liquid cylinder 17-6 and the tube sheet 17-8, the upper distribution plate 17-5 is arranged on the top of the liquid collecting cylinder 17-6, the lower distribution plate 17-7 is arranged inside the liquid collecting cylinder 17-6, and the upper layer distributes The disk 17-5 is parallel to the lower distribution disk 17-7, and the distance pipe A 17-9 is arranged between the upper distribution disk 17-5 and the lower distribution disk 17-7, and the lower distribution disk 17-7 and the tube plate 17-8 There is a fixed distance tube B 17-15 between th...

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Abstract

The invention relates to a zinc chloride solution multiple-effect evaporation and concentration production process which comprises the following steps: preheating a raw material zinc chloride solution, carrying out double-effect falling film evaporation and single-effect high-temperature concentration, concentrating the zinc chloride solution with the solid content of 40% to 65%, and completely removing water in the solution by using a high-temperature concentration device. High-purity zinc chloride can be produced, and the condensed water after heat exchange enters the zinc chloride reactionprocess to be repeatedly utilized so that the energy consumption is saved, and the zero discharge of wastewater is realized.

Description

technical field [0001] The invention relates to a zinc chloride solution multi-effect evaporation concentration production process, which belongs to the technical field of zinc chloride solution treatment. Background technique [0002] High-grade pure zinc chloride is widely used in battery industry, pharmaceutical industry, petroleum purifier, etc. At present, most of the evaporation of zinc chloride solution in China is produced intermittently. The zinc chloride solution is evaporated in a graphite evaporator, and the evaporator uses steam Heating, evaporating to a certain concentration, and then drying through the graphite slope dryer. During the drying process, the steam is easy to diffuse, and a steam recovery device needs to be installed above the graphite slope. The steam cannot be reused, and the consumption is relatively large. The steam generated during the production process contains HCL gas, which is easy to cause environmental pollution. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/04B01D1/26
CPCB01D1/26C01G9/04
Inventor 李祥宇刘涛李超张延全王正利吕萌李林张自督
Owner 山东瑞琦能源科技有限公司
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