Technology for preparing low-carbon alcohol, urea, and liquefied natural gas from coke oven gas

The invention discloses a technology for preparing low-carbon alcohol, urea, and liquefied natural gas from coke oven gas. The technology comprises the following steps: subjecting crude coke oven gas to desulfurization and decarbonization to obtain purified coke oven gas; recycling separated H2S after sulfur is removed, subjecting separated CO2 to steam stripping, then using CO2 to synthesize urea; separating the purified coke oven gas, using separated CH4 to produce (liquefied natural gas) LNG products; after the separation, using the coke oven gas to synthesize low-carbon alcohol to obtain a gas product and a liquid product, which is a mixture of water and low-carbon alcohols; separating water and low-carbon alcohols to obtain the low-carbon alcohol product; separating the gas product, returning the separated CO, CO2, and the like to the coke oven gas, purifying, merging the separated H2 with nitrogen gas to carry out ammonia synthesis, and finally using synthesized ammonia and CO2 obtained in the steam stripping step to synthesize urea. The provided method can improve the utilization rate of raw material gas, and thus the low-carbon alcohol production cost can be reduced.