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After joining the company, I was assigned a task. Initially, dry gas was being used as the fuel gas in the gas pipeline network, and there was a problem of insufficient pressure in this network. The reasons for this were as follows: 1. The pressure of the dry gas produced by the coking and catalytic cracking units was unstable. 2. At the end-use units, high temperatures were applied during quality inspection, which led to insufficient supply of gas; when this occurred, natural gas would be injected into the system. The instability in the composition of the fuel gas caused the units to overheat and become difficult to control. I proposed several solutions: 1. Modify the liquefied gas storage tanks to increase their pressure capacity. Problem: The storage tanks can hold around 1,000 KG of gas, while the entire gas pipeline network requires around 20,000 KG of dry gas. Any fluctuation in the amount of dry gas produced would result in a shortfall of more than 1,000 KG, so this solution isn’t very effective. I’m wondering if anyone here has any good suggestions I could consider? ~{:1_90:}
The calorific value of gas fluctuates, with the greatest fluctuations occurring when switching from coking to bypass mode and switching to venting mode; at such times, the amount of dry gas produced is very low. In our case, we use natural gas or liquefied gas to supplement the gas, in order to maintain a high pressure of around 0.55 Mpa! Additionally, the gas system of the gas holder is also being replenished! So fluctuations in gas pressure are normal; just adjust frequently and carefully!
Natural gas is preferred for hydrogen production due to its high efficiency; natural gas is only used when the pipeline network is insufficient. However, natural gas also presents drawbacks – it’s difficult to control the flame in the equipment, and the ratio of natural gas to dry gas remains unstable, resulting in flames that vary in intensity