Method and device for synthesizing natural gas by using coke oven gas
A technology for synthesizing natural gas and coke oven gas, which is applied in the direction of gas fuel, petroleum industry, fuel, etc., can solve the problems of underutilization of hydrogen, underutilization of precious resource hydrogen, underutilization of hydrogen, etc., and achieve wide industrial application value, Good application value and the effect of enhancing the service life
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Embodiment 1
[0036] Such as figure 1 As shown, the coke oven gas is compressed to 3.0 MPa after conventional purification, detarring, desulfurization, deammonization, debenzene and naphthalene removal, and the composition is (volume %) H 2 60%, CH 4 25%, CO6%, CmHn3%, CO 2 2%, N 2 4%, O 2 0.5%, and then enter the low-temperature methanol eluting device for fine desulfurization, and the purified gas is supplemented with waste CO discharged from the urea plant 2 After entering the first-stage methanation reactor, CO 2 The additional amount is 5% of the coke oven gas, the reaction temperature is 250-500°C, the catalyst is nickel / alumina, and 10% CO is added to the reacted gas 2 Then enter the boiler to produce steam, and enter the second-stage methanation reactor after cooling down. The reaction temperature is 250-500°C, the catalyst is nickel / alumina, and the hydrogen content in the outlet mixture of the second-stage reactor is 10%-20%, and then react The product flows into the boiler ...
Embodiment 2
[0038] Such as figure 2 As shown, coke oven gas is compressed to 1.0 MPa after conventional purification to remove tar, desulfurization, deammonization, debenzene and naphthalene, and the composition is (volume %) H 2 60%, CH 4 25%, CO6%, CmHn3%, CO 2 2%, N 2 4%, O 2 0.5%, then heat up to 150°C, after entering the conversion and absorption fine desulfurization reactor, the built-in absorption conversion desulfurization agent, the carrier is manganese ore, the active tissue is Co, Mo and Zn, and the gas after fine desulfurization enters the isothermal bed for methanation The first-stage reactor, the reaction temperature is 300°C, the methanation catalyst is nickel / diatomaceous earth, after the reaction, the gas boiler is cooled, and the blast furnace gas is added before entering, and then enters the second-stage methanation reactor, the composition of blast furnace gas is 30% CO, CO 2 18%, H 2 1.5%, N 2 29.2%, O 2The additional amount is 1.2%, and the additional amount...
Embodiment 3
[0040] Such as image 3 As shown, the coke oven gas is conventionally purified to remove tar, desulfurization, deamination, debenzene and naphthalene, then compressed to 4.0MPa, then heat exchanged and raised to 400°C, after entering the conversion and absorption fine desulfurization reactor, the built-in absorption conversion Desulfurization agent, the carrier is diatomaceous earth, the active components are Ni, Cu, and Zn, the gas after fine desulfurization enters the first-stage methanation reactor, the reaction temperature is 250-500°C, the catalyst is nickel / ceramic, and the high-temperature gas generated by the reaction After entering the boiler to generate steam and cooling down to add converter gas, it enters the second-stage methanation reactor. The composition of converter gas is 60% CO, CO 2 It is 16%, and the additional amount is 20% of the coke oven gas. The high-temperature gas from the second-stage methanation reactor enters the boiler to generate steam, and the...
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