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A kind of brine impurity removal device and impurity removal process

A brine and process technology, which is applied in the field of brine removal devices and impurities removal processes, can solve the problems of slow filtration, high water content in filter cakes, and inability to form

Active Publication Date: 2021-12-10
重庆天原化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the brine environment, the particles of calcium carbonate and magnesium hydroxide generated are too small to form colloidal precipitates. The filtration speed of the colloidal precipitates is relatively slow during plate and frame press filtration, and the water content of the filter cake is relatively high. , or even unable to form, which makes the subsequent disposal of the filter cake more difficult. In addition, it causes the loss of brine and increases the salt consumption of alkali making

Method used

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  • A kind of brine impurity removal device and impurity removal process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1, The brine impurity removal device includes a cylindrical shell 1 , a guide tube 2 , and a stirring device 3 . The cylindrical shell 1 is composed of an upper cylindrical shell 11 and a lower conical shell 12. The bottom of the conical shell 12 is provided with a salt mud outlet 121, which is opened and closed by a valve. Close, in the present embodiment, the inner space of the cylindrical section housing 11 is a stepped shape with the upper part being a large diameter section and the lower part being a small diameter section, and a cone-shaped section passes between the large diameter section and the small diameter section of the cylindrical section housing 11. The shells are connected, the big end of the conical shell faces upwards, the small end of the conical shell faces downwards, the shell of the cylindrical section and the shell of the conical section are made of stainless steel, and the large diameter of the shell of the cylindrical section The upp...

Embodiment 2

[0035] The brine impurity removal device of Example 1 was used to carry out the impurity removal test, and the capacity of the cylindrical shell was 25L.

[0036] In the brine to be removed, the content of sodium chloride is 300g / l, the content of calcium chloride is 2.8g / l, and the content of magnesium chloride is 2.0g / l.

[0037] The removal steps are:

[0038] 1) Add brine to the brine impurity removal device, the added brine overflows the upper opening of the guide tube in the brine impurity removal device, and add 19g of magnesium hydroxide and 40g of calcium carbonate as crystal seeds;

[0039] 2) Turn on the stirring device, stir at a rotating speed of 60rpm, add brine to the upper part of the inner space of the draft cylinder through the brine delivery pipe, and add the impurity remover to the lower part of the inner space of the draft barrel through the impurity removal agent delivery pipe, and control the flow rate of the brine to 80ml / min. The flow rate of impurity...

Embodiment 3

[0043] The brine impurity removal device of Example 1 was used to carry out the impurity removal test, and the capacity of the cylindrical shell was 25L.

[0044] In the brine to be removed, the content of sodium chloride is 300g / l, the content of calcium chloride is 3.4g / l, and the content of magnesium chloride is 1.6g / l.

[0045] The removal steps are:

[0046] 1) Add brine to the brine impurity removal device, the added brine overflows the upper opening of the guide tube in the brine impurity removal device, and add 3 g of magnesium hydroxide and 9 g of calcium carbonate as crystal seeds;

[0047] 2) Turn on the stirring device, stir at a rotating speed of 60rpm, add brine to the upper part of the inner space of the draft cylinder through the brine delivery pipe, and add the impurity remover to the lower part of the inner space of the draft barrel through the impurity removal agent delivery pipe, and control the flow rate of the brine to 80ml / min. The flow rate of impurity...

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Abstract

A brine impurity removal device, including a cylindrical shell, a guide tube, and a stirring device, the cylindrical shell is composed of an upper cylindrical shell and a lower conical shell, the conical The bottom of the section shell is provided with a salt mud outlet, and the opening and closing are controlled by a valve. The diameter of the guide tube is smaller than the inner diameter of the cylindrical section shell. There is a distance between the opening of the lower end of the cylinder and the shell of the conical section, and the stirring blades of the stirring device are arranged in the inner space of the guiding cylinder, which is used to mix the liquid in the hollow of the guiding cylinder and drive the liquid to flow downward , the upper part of the cylindrical shell is provided with a brine overflow port, the cylindrical shell is provided with a brine conveying pipe, and the discharge port of the brine conveying pipe is located at the upper part of the inner hollow of the guide cylinder, and the cylindrical shell The impurity removal agent conveying pipe is arranged on the top, and the outlets of the impurity remover conveying pipe are multiple, evenly distributed along the circumference of the guide cylinder, and located at the lower part of the inner cavity of the guide cylinder.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a brine impurity removal device and impurity removal process. Background technique [0002] Most chlor-alkali production enterprises use brine instead of industrial salt as raw material to reduce the cost of chlor-alkali production. Since the concentration of calcium and magnesium ions in brine is much higher than that of brine prepared with industrial salt, it is necessary to remove calcium and magnesium ions in brine. [0003] The traditional impurity removal process is to directly mix sodium carbonate and sodium hydroxide with brine to form calcium carbonate and magnesium hydroxide precipitates, and then remove the precipitates by filtration. However, in the brine environment, the particles of calcium carbonate and magnesium hydroxide generated are too small to form colloidal precipitates. The filtration speed of the colloidal precipitates is relatively slow during plate and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/46C25B15/08
CPCC25B1/46C25B15/08
Inventor 陈云海廖晓鹏周秀何涛龙伟
Owner 重庆天原化工有限公司
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