Series quenching adiabatic fixed bed methanation reactor and process
A technology of methanation reactor and adiabatic fixed bed, which is applied in the fields of chemical instruments and methods, petroleum industry, chemical/physical process, etc. It can solve the problem of limited bed temperature rise and insufficient cooling of high-temperature gas at the outlet of catalyst beds, etc. problems, to achieve the effect of reducing equipment investment, improving single-column methane, and achieving integration
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Embodiment 1
[0028] A single-stage series cold shock adiabatic fixed bed methanation reactor process.
[0029] The clean synthesis gas at 170°C and 3.0MPa at 10,000 kmol / h after fine desulfurization in the ultra-precision reactor is composed of (v%): CH 4 17.767%, CO 19.008%, CO 2 1.040%, H 2 61.195%, N 2 0.840%, C 2 H 6 0.010%, AR 0.140%. It is mixed with 20t / h 400℃, 3.5MPa superheated steam, 12000kmol / h circulating gas, and then heated to 300℃ through the feed gas preheater to enter the fixed bed methanation catalyst bed, and the outlet gas temperature is 663℃. The 110t, 30°C desalinated water is pressurized by a water pump to 3.0MPa and then injected into the cold shock chamber at the lower end of the fixed bed catalyst bed to quickly cool the high-temperature gas to 315°C. The cold-shocked gas is divided into two, and one strand is cooled to After 80°C, the separated water gas is mixed with fresh synthesis gas into the fixed bed methanation catalyst bed as circulating gas, and the ot...
Embodiment 2
[0032] Process form of three-stage series cold shock adiabatic fixed bed methanation reactor
[0033] The clean synthesis gas at 170°C and 3.0MPa at 10,000 kmol / h after fine desulfurization in the ultra-precision reactor is composed of (v%): CH 4 17.767%, CO 19.008%, CO 2 1.040%, H 2 61.195%, N 2 0.84%, C 2 H 6 0.01%, AR 0.14%. The synthesis gas is divided into three for split flow, and the split ratio of the fresh gas that enters the three fixed bed methanation reactor beds in sequence is 5:3:2 by volume. The fresh gas entering the first stage of the bed is mixed with 20t / h of 400℃, 3.5MPa superheated steam and 4720kmol / h circulating gas, and then heated to 300℃ through the feed gas preheater to enter the first stage of the catalyst bed. The outlet gas temperature is 627 ℃. 40t, 30°C desalinated water is pressurized by a water pump to 3.0MPa, and then injected into the cold shock chamber to quickly cool the outlet high-temperature gas to 357°C, mix with the second stream o...
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