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Method for preventing coal gas from being coked during preheating

A gas and preheater technology, applied in chemical instruments and methods, chemical/physical/physical chemical processes, chemical/physical processes, etc., can solve problems such as affecting production and long processing time, and achieve stable production and facilitate industrialization. Production, low cost effect

Inactive Publication Date: 2012-11-21
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Another method is, for the carbon deposition in the preheater, it is used industrially in the case of parking, to ensure that the preheater is at a certain temperature, and the air is introduced to carry out the oxidation reaction for treatment. The treatment process takes a long time and affects the normal operation. Production

Method used

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  • Method for preventing coal gas from being coked during preheating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Use a gas press to blow coke oven gas into the preheater, and install a steam inlet device on the pipeline where the gas enters the preheater. When the gas enters the preheater, steam is introduced at the same time, and the steam is blown in at a proportion of 1%. , the steam pressure of the water vapor is 0.5Mpa, so that the steam and the gas enter the preheater together, control the residence time of the mixed gas in the preheater to be 300s, the preheating temperature is 950℃, and the preheater pipeline is used continuously for 10 days. There is a small amount of carbon deposition inside, the pipeline pressure increases, the thickness of the carbon deposition layer reaches 2mm, and it is used after high temperature treatment with air.

Embodiment 2

[0042] Use a gas press to blow coke oven gas into the preheater, and install a steam inlet device on the pipeline where the gas enters the preheater. When the gas enters the preheater, steam is introduced at the same time, and the steam is blown in at a ratio of 20%. , the steam pressure of the water vapor is 0.5Mpa, so that the steam and the gas enter the preheater together, control the residence time of the mixed gas in the preheater to be 5s, the preheating temperature is 1200℃, and the preheater pipeline is used continuously for 45 days. No carbon deposits inside.

Embodiment 3

[0044] Use a gas compressor to blow coke oven gas into the preheater, and install a steam inlet device on the pipeline where the gas enters the preheater. When the gas enters the preheater, steam is introduced at the same time, and the steam is injected in the proportion of 5%. , the steam pressure of the water vapor is 0.1Mpa, so that the steam and gas enter the preheater together, control the residence time of the mixed gas in the preheater to be 300s, the preheating temperature is 950℃, and the preheater pipeline is used continuously for 30 days. No carbon deposits inside.

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Abstract

The invention discloses a method for preventing coal gas from being coked during preheating, which comprises the following steps of: mixing the coal gas with water vapor to form mixed gas and then preheating the mixed gas in a preheater, wherein the preheating temperature is 300-1200 DEG C. The method has the beneficial effects that as the water vapor is adopted as a raw material, the cost is low, and the process is simple and is easy to control; no stopping processing is required, so that the continuous preheating operation of the coal gas can be realized; and when the method is adopted for preheating the coal gas, the number of days generated by continuously using deposited carbon in a pipeline of the preheater is greatly prolonged, the effect of preventing coking or carbon deposition during preheating of coal gas is remarkable, and the production is stable.

Description

technical field [0001] The invention belongs to the fields of metallurgy and chemical industry, in particular, the invention relates to a method for preventing coal gas from coking during preheating, in particular to a method for preventing coal gas from coking during preheating under high temperature conditions. Background technique [0002] In the industrial production process of metallurgy and chemical industry, the chemical and physical changes of substances are involved from the entry of raw materials to the production of products, and the control of temperature is very important. In order to obtain better technical and economic indicators, it is necessary to strictly control the reaction temperature, etc. Operating parameters, balancing the reaction heat of the reaction to ensure that the production process is under the required temperature conditions. In the process of industrial design, corresponding adjustment measures are adopted to achieve the corresponding reacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00
Inventor 税必刚程晓哲叶恩东马维平张兴勇
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP