Gas composition
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Dear sea friends, please help! Today, the calorific value of the gas produced by my coking plant is as low as 16,300, whereas it used to be around 17,300. The increase is mainly due to higher levels of carbon monoxide and carbon dioxide. I would appreciate any advice you can offer; thank you very much!
I can’t see the test results, so I can’t draw any conclusions.
Originally, the composition was: CO2 5.0, CmHn 1.6, O2 0.6, CH4 26.4, H2 57.1, N2 1.8, CO 6.4, with an energy value of 17747 KJ/M3. Now, the composition is: CO2 7.0, CmHn 1.6, O2 0.8, CH4 20.2, H2 57.8, N2 1.8, CO 10.8, with an energy value of 16018 KJ/M3. Could someone please help analyze why this change has occurred?
The calorific value you provided indicates heating with coke oven gas. Our factory uses blast furnace gas for heating. Check the @ value, and also pay attention to the purification of coke oven gas; an increase in tar, tar residues, and naphthalene in the gas can easily lead to blockages in pipes and fittings. An improper coke oven pressure regime, with negative pressure in the carbonization chamber, can also lead to a decrease in calorific value and fluctuations in it.
Has the temperature in the furnace top area increased recently, due to a decrease in the methane content and an increase in the CO content in the gas?； Also, check if there is any change in the air intake volume?