| abstract |
The present invention relates to coking/steel mill's industry coke-stove gas technical field of comprehensive utilization, specifically a kind of method and device of coke-stove gas LNG combined production of methanol, it is characterised in that successively using following preparation process：After coke-stove gas first passes through compressor pressurization, then naphthalene, tar, NH are removed by TSA pretreatments and the de- benzene of PSA 3 , benzene and other heavy hydrocarbon compounds, then carry out desulfurization by sending into hydrodesulfurization unit after coke oven gas compressor pressurization, being re-fed into MDEA decarbonization devices carries out decarburization, then carries out LNG cryogenic separations, obtains product LNG.The present invention is compared with prior art, coke-stove gas carries out TSA pretreatments successively after being exported through compressor secondary exit port and PSA takes off benzene, no longer contain the impurity such as naphthalene, tar, benzene in coke-stove gas, therefore after returning to compressor three-level entrance, compressor three-level and level Four no longer sewage effluent, reduce the treatment load of sewage treatment plant. |