Graphite heat exchanger cleaning method

A technology of graphite heat exchanger and heat exchanger, applied in the chemical industry, can solve the problems of high material outlet temperature, time-consuming, affecting heat exchange effect, etc., to achieve the effect of ensuring heat exchange effect, facilitating absorption, and reducing temperature

Inactive Publication Date: 2015-04-08
贵州瓮福蓝天氟化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the production process of graphite heat exchanger, it is easy to generate scaling on the tube wall and blockage. After the heat exchanger is blocked, the heat exchange effect will be affected, and the temperature of the material outlet is high, which is not conducive to the gas absorption of the subsequent system.
The existing cleaning method is to use a high-pressure cleaner to clean manually with process water. Manual cleaning is time-consuming and labor-intensive, which can easily cause damage to the heat exchanger. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A cleaning method for a graphite heat exchanger, comprising the following steps:

[0015] (1) Fill the process water into the hydrofluoric acid acid dispensing tower, and stop adding process water when the liquid level reaches 50%; the HF from the AHF unit is introduced into the hydrofluoric acid acid dispensing tower, and is absorbed in the tower by pump circulation, and the acid dispensing The concentration of hydrofluoric acid in the tower is constantly increasing, and when the mass concentration reaches 40%, stop adding HF;

[0016] (2) When the heat exchanger of the concentration system of the device needs to be cleaned, the heat exchanger is deactivated and emptied, and the hydrofluoric acid in the hydrofluoric acid dispensing tower is sent to the inlet of the graphite heat exchanger by the acid dispensing pump. The outlet of the heat exchanger is returned to the acid distribution tower, and the hydrofluoric acid is circulated and cleaned in the heat exchanger;

...

Embodiment 2

[0019] A cleaning method for a graphite heat exchanger, comprising the following steps:

[0020] (1) Fill the process water into the hydrofluoric acid acid dispensing tower, and stop adding process water when the liquid level reaches 40%; the HF from the AHF unit is introduced into the hydrofluoric acid acid dispensing tower, and is absorbed in the tower by pump circulation, and the acid dispensing The concentration of hydrofluoric acid in the tower is constantly increasing, and when the mass concentration reaches 50%, stop adding HF;

[0021] (2) When the heat exchanger of the concentration system of the device needs to be cleaned, the heat exchanger is deactivated and emptied, and the hydrofluoric acid in the hydrofluoric acid dispensing tower is sent to the inlet of the graphite heat exchanger by the acid dispensing pump. The outlet of the heat exchanger is returned to the acid distribution tower, and the hydrofluoric acid is circulated and cleaned in the heat exchanger;

...

Embodiment 3

[0024] A cleaning method for a graphite heat exchanger, comprising the following steps:

[0025] (1) Fill the process water into the hydrofluoric acid acid dispensing tower, and stop adding process water when the liquid level reaches 60%; the HF from the AHF unit is introduced into the hydrofluoric acid acid dispensing tower, and is absorbed in the tower by pump circulation, and the acid dispensing The concentration of hydrofluoric acid in the tower is constantly increasing, and when the mass concentration reaches 30%, stop adding HF;

[0026] (2) When the heat exchanger of the exhaust gas absorption system needs to be cleaned, the heat exchanger is deactivated and emptied, and the hydrofluoric acid in the hydrofluoric acid dispensing tower is sent to the inlet of the heat exchanger by the acid dispensing pump. The outlet is returned to the acid distribution tower, and the hydrofluoric acid is circulated and cleaned in the heat exchanger;

[0027] (3) When the concentration o...

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PUM

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Abstract

The invention discloses a graphite heat exchanger cleaning method, which comprises the following steps: adding process water into an acid blending tower of hydrofluoric acid and stopping adding the process water when a liquid level reaches 40-50%; introducing the HF (hydrofluoric acid) into the acid blending tower of the hydrofluoric acid, absorbing by pump circulation in the tower to cause the concentration of the hydrofluoric acid in the acid blending tower to be continuously raised, and stopping adding the HF when a mass concentration reaches 30-50%; when a heat exchanger needs to be cleaned, stopping using and emptying the heat exchanger, conveying the HF to an inlet of the graphite heat exchanger by an acid blending pump, and causing the HF to return to the acid blending tower from the outlet of the heat exchanger so as to circularly clean the HF in the heat exchanger. The graphite heat exchanger cleaning method has the advantages of high speed, convenience and high cleaning efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a cleaning method for a graphite heat exchanger. Background technique [0002] During the production process of graphite heat exchangers, fouling is easy to occur on the tube wall and blockage occurs. After the heat exchanger is blocked, the heat exchange effect will be affected, and the material outlet temperature is high, which is not conducive to the gas absorption of the subsequent system. The existing cleaning method is to use a high-pressure cleaner to clean manually with process water. Manual cleaning is time-consuming and labor-intensive, which can easily cause damage to the heat exchanger. question. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned shortcoming and provide a kind of fast, convenient, high-efficiency graphite heat exchanger cleaning method. [0004] The cleaning method of a k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28G9/00
Inventor 陈维孟文祥杨国荣
Owner 贵州瓮福蓝天氟化工股份有限公司
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