A method and device for producing natural gas from low-hydrogen carbon bilan coke tail gas
A technology of semi-coke tail gas and low hydrogen carbon, which is applied in the field of natural gas production from semi-coke tail gas, can solve problems such as difficulty in ensuring stability, difficult temperature control, and no industrialized cases of semi-coke preparation of natural gas, so as to avoid equipment and operation and improve utilization Efficiency and the effect of reducing the risk of carbon accumulation
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Embodiment 1
[0056] The hydrogen-to-carbon ratio of the blue-coke tail gas in the table below is 0.9891:
[0057]
[0058] Note: The semi-coke tail gas also contains impurities such as tar, benzene, naphthalene, phenol, dust, sulfide, ammonia, and heavy metals.
[0059] The semi-coke tail gas with a molar flow rate of 2000kmol / h is first pressurized to 3.0MPa, heat exchanged to 160°C, and desulfurized after entering the purification system, so that the sulfur content of the purified semi-coke tail gas is ≤20ppb.
[0060] Then the purified semi-coke tail gas is divided into three shares according to the volume ratio of 8:5:7, the first 797kmol / h gas and 170°C, 530kmol / h cycle gas (as shown in the figure, the cycle gas comes from R3 After the outlet gas) is mixed, it is mixed with 203kmol / h of circulating water (as shown in the figure, the circulating water comes from the reaction production water, after V1 is separated, a part is used for circulation), and the water content of...
Embodiment 2
[0063] The hydrogen-to-carbon ratio of the blue-coke tail gas in the table below is 0.7595:
[0064]
[0065] Note: The semi-coke tail gas also contains impurities such as tar, benzene, naphthalene, phenol, dust, sulfide, ammonia, and heavy metals.
[0066] The semi-coke tail gas with a molar flow rate of 2000kmol / h is first pressurized to 3.0MPa, heat exchanged to 160°C, and desulfurized after entering the purification system, so that the sulfur content of the purified semi-coke tail gas is ≤20ppb.
[0067] Then the purified semi-coke tail gas is divided into three shares according to the volume ratio of 18:14:18, the first 718kmol / h gas and the 170°C, 396kmol / h cycle gas (as shown in the figure, the cycle gas comes from R3 After the outlet gas) is mixed, it is mixed with 196kmol / h of circulating water (as shown in the figure, the circulating water comes from the reaction production water, after V1 is separated, a part is used for circulation), and the water con...
Embodiment 3
[0070] The hydrogen-to-carbon ratio of the blue-coke tail gas in the table below is 0.6027:
[0071]
[0072] Note: The semi-coke tail gas also contains impurities such as tar, benzene, naphthalene, phenol, dust, sulfide, ammonia, and heavy metals.
[0073] The semi-coke tail gas with a molar flow rate of 2000kmol / h is first pressurized to 3.0MPa, heat exchanged to 160°C, and desulfurized after entering the purification system, so that the sulfur content of the purified semi-coke tail gas is ≤20ppb.
[0074] Then the purified semi-coke tail gas is divided into three shares according to the volume ratio of 4:3:3, the first 799kmol / h gas and 170°C, 208kmol / h cycle gas (as shown in the figure, the cycle gas comes from R3 After the outlet gas) is mixed, it is mixed with 210kmol / h circulating water (as shown in the figure, the circulating water comes from the reaction production water, after V1 is separated, a part is used for circulation), and the water content of th...
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