Can natural gas be used to heat coke ovens?
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Can natural gas be used to heat coke ovens?
It can be heated, but natural gas has a high calorific value, about twice that of coke oven gas, making it unsuitable for high-temperature coke ovens.
Yes, it can be heated; it’s just more expensive. Natural gas is used for the first heating of our production line, but it is not needed after it starts operating.
Sure! Since the calorific value is nearly twice that of coke oven gas, care must be taken to adjust the amount of air supplied and the exhaust gas flow!
Sure, it’s possible. Heating with coke oven gas essentially means using hydrogen or methane gas; natural gas can also be used, but the cost is not favorable
Heat-recovery coke ovens use natural gas for heating; in the later stages of operation, natural gas is sometimes used to provide additional heat.
I am considering using methane produced from coke oven gas to burn in the coke ovens, while using other syngases to produce chemical products; this way, the amount of combustion air and fuel gas required **decreases**, which is an energy-saving approach. What are everyone’s thoughts?
Reply to 7# liujianguo1116: If methane is used as the heating gas, high-altitude heating in coke ovens is also a problem
It can be used; note that natural gas has a high calorific value, so small orifice plates should be used, and the pressure must be maintained at a level sufficient for the burner to function. Generally, when heating a coke oven internally using natural gas as fuel for this purpose, attention must also be paid to the issue of graphite formation on the burner elements. Using natural gas is too costly; it’s not economical
Reply to 7# liujianguo1116: The approach is good, but the methane content in coke oven gas is not high; it is necessary to conduct a comprehensive calculation of the calorific value balance. And it seems that using methane for chemical production yields better economic benefits
If heating with methane is possible, there is enough methane in the coke oven gas, and some excess methane can also be used to produce liquefied products. It comes down to the design of the coke oven: the distance between the flame and the oven, as well as the height of the oven, need to be redesigned. Using coke oven gas for combustion and then methanizing the excess coke oven gas is certainly less cost-effective than using methane to displace the coke oven gas. You can roughly estimate how much more methane can be obtained by considering the calorific value; moreover, less air being used also helps to reduce heat losses.