Method for preventing and removing scale of non-strong alkali solution by rare-earth porcelain sand

An alkaline solution, porcelain sand technology, applied in damage protection, heat exchange equipment, cleaning heat transfer devices, etc., can solve problems such as lack of descaling effect

Inactive Publication Date: 2018-08-14
XIAOGAN GUANGYAN HUAYUAN SALT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, to propose a method of anti-scaling and descaling using rare earth porcelain sand to non-strong alkali solution, and to solve the lack of descaling in the prior art that has good descaling effect and does not cause pollution. technical issues of the way

Method used

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  • Method for preventing and removing scale of non-strong alkali solution by rare-earth porcelain sand
  • Method for preventing and removing scale of non-strong alkali solution by rare-earth porcelain sand

Examples

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Effect test

Embodiment 1

[0018] Example 1, when the volume ratio of rare earth porcelain sand was 5%, and the volume ratio of aqueous sodium chloride solution was 95%, after 24 hours, the scaling rate was 5g / (m 2 h), after 48 hours, the fouling rate was 3g / (m 2 h), after 96 hours, the fouling rate was 1.6g / (m 2 h).

Embodiment 2

[0019] Example 2, when the volume ratio of rare earth porcelain sand was 8%, and the volume ratio of sodium chloride aqueous solution was 92%, after 24 hours, the scaling rate was 4g / (m 2 h), after 48 hours, the fouling rate was 2.2g / (m 2 h), after 96 hours, the fouling rate was 1.2g / (m 2 h).

Embodiment 3

[0020] Example 3, when the volume ratio of rare earth porcelain sand was 10%, and the volume ratio of sodium chloride aqueous solution was 90%, after 24 hours, the scaling rate was 3.8g / (m 2 h), after 48 hours, the fouling rate was 2.1g / (m 2 h), after 96 hours, the fouling rate was 1.1g / (m 2 h).

[0021] The solution to be exchanged is sodium sulfate aqueous solution as an example, and the anti-scaling and descaling effects of rare earth porcelain sand are as shown in Examples 4-6.

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Abstract

The invention belongs to the technical field of scale prevention of shell-and-tube heat exchangers, and discloses a method for preventing and removing scale of anon-strong alkali solution by rare-earth porcelain sand. The method comprises the steps that the rare-earth porcelain sand is injected into a solution to be heat exchanged, and the rare-earth porcelain sand flows and is mixed with the solution to be heat exchanged. The invention further discloses application of the rare-earth porcelain sand in scale prevention and scale removal of the non-strong alkali solution. The method for preventing and removing scale of the non-strong alkali solution by the rare-earth porcelain sand has the beneficial effects that on-line scale prevention and scale removal are achieved by physical means, recycling is achieved, and the solution and the environment are not polluted.

Description

technical field [0001] The invention belongs to the technical field of anti-scaling of tube and tube heat exchangers, and in particular relates to a method for anti-scaling and descaling of non-strong alkali solution by using rare earth porcelain sand. Background technique [0002] Tube-and-tube heat exchangers are widely used in the industrial production of chemical industry and light industry, and generally follow the principle of clean fluid going to the shell side and unclean fluid going to the tube side, the purpose is to facilitate the cleaning of the scale layer on the tube side. In the heat exchange process of chemical and light industrial production, the layout of the circulating mother liquid belongs to the principle of the aforementioned tube pass. [0003] The circulating mother liquor generally contains a small amount of solid phase components. The solid phase components are very small due to the supersaturation of the crystallization. When the temperature chang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F19/00F28G13/00
CPCF28F19/00F28G13/00
Inventor 左敏杨进兵
Owner XIAOGAN GUANGYAN HUAYUAN SALT MFG
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