Method for removing carbon deposits in gas preheating pipes

A technology of gas preheating pipes and preheating pipes, applied in cleaning methods and appliances, chemical instruments and methods, cleaning hollow objects, etc., can solve the problems of large heat release, burnout of gas preheating pipes, etc., and achieve rapid removal Effect

Active Publication Date: 2016-01-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the reaction is accelerated by increasing the air intake, the reaction will be more intense at the pipe wall where there is more carbon deposit, which will easily cause excessive local heat release, which will cause the risk of local burnout of the gas preheating pipe

Method used

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  • Method for removing carbon deposits in gas preheating pipes
  • Method for removing carbon deposits in gas preheating pipes
  • Method for removing carbon deposits in gas preheating pipes

Examples

Experimental program
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Embodiment Construction

[0024] Below in conjunction with embodiment the present invention is further described:

[0025] Gas preheating pipe carbon deposit removal method, feed x gas and y gas into the preheating pipe, control the reaction temperature at 500-1000°C, and continue until the gas preheating pipe ventilation resistance becomes smaller, first stop feeding x gas, and then Stop feeding y gas, and resume feeding gas, and the gas preheating pipe resumes normal operation; the x gas is a gas that reacts exothermicly with carbon, and the gas y is a gas that reacts endothermicly with carbon.

[0026] This method feeds gas x and gas y into the preheating tube, wherein gas x is a gas that reacts exothermicly with carbon, which can be a mixed gas, such as air, or a single gas, such as oxygen, ozone, etc. The y gas is a gas that undergoes an endothermic reaction with carbon, such as water vapor, carbon dioxide, and the like.

[0027] While feeding the gas, keep the temperature in the pipeline at 500-...

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Abstract

The invention relates to a removal method for carbon deposits of a gas preheating pipe. Gas x and gas y are injected into the preheating pipe, the reaction temperature is controlled within 500-1000 DEG C until the ventilation resistance of the gas preheating pipe becomes small, then injection of the gas x is stopped, injection of the gas y is stopped, gas injection is recovered, and the normal operation state of the gas preheating pipe is recovered. The gas x is the gas having exothermic reaction with carbon, and the gas y is the gas having endothermic reaction with the carbon. According to the removal method for the carbon deposits of the gas preheating pipe, the carbon deposits in the gas preheating pipe can be removed faster, and the risk that the gas preheating pipe is partially burnt due to partial overheating at the position with too many carbon deposits can be avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for removing carbon deposits on the inner wall of a gas preheating pipe. Background technique [0002] In industrial production, in the reaction system of materials and coke oven gas, if the reaction temperature is relatively high, the coke oven gas is generally preheated by the gas preheating tube. Since coke oven gas contains methane and other unsaturated hydrocarbons, these components will be cracked in the high-temperature preheating tube to produce elemental carbon, which adheres to the inner wall of the preheating tube to form carbon deposits. Over time, the carbon deposits on the inner wall of the preheating pipe gradually become thicker, which not only increases the resistance of the pipe ventilation, but also affects the heat transfer performance of the preheating pipe, greatly reducing the preheating efficiency of the entire preheating coil. Carbon deposits fa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/027
CPCB08B9/027B08B2209/027
Inventor 张兴勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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