Can the coke oven gas purification and desulfurization unit be placed after benzene removal and ammonium sulfide treatment?
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As the title suggests, I would like to ask the experts: under normal circumstances, the purification sequence for coke oven gas is: initial cooling → electrostatic tar removal → desulfurization → naphthalene removal → benzene washing → ammonium sulfate production. Can desulfurization be placed at the end of the process? The purification process would then be: initial cooling → electrostatic tar capture → naphthalene removal → benzene washing → ammonium sulfate formation → desulfurization. What are the impacts? I would be extremely grateful if the experts could kindly offer their guidance!
It’s better to carry out any removal that is not beneficial for production as early as possible!
It is placed at the back so as to produce sulfur of higher quality; what comes out at the front is black sulfur, which is essentially solid waste.
Can placing it at the back improve the quality of sulfur?
Hydrogen sulfide and HCN affect the quality of the washing oil, accelerate its deterioration, and thereby increase the consumption of washing oil per ton of benzene； Corrodes subsequent purification equipment. It’s better to place the desulfurization section at the front.
Primary cooling → Electrostatic tar capture → Ammonium sulfate production → Naphthalene removal → Benzene washing → Desulfurization; it can also be done in this way
I’d like to hear the details. Are there any relevant materials?
Thank you very much. Are there any approximate figures for the levels of tar, benzene, and naphthalene before desulfurization?