【Production Version】Daily Question 2018-5-15 (Short Answer)

1. Low intake air volume； 2. After replacing it with a new catalyst, the catalyst exhibits good activity and a high synthesis efficiency; as a result, the inlet pressure also decreases accordingly ； The overall pressure is low, so the inlet pressure also decreases accordingly ； 3. There is internal leakage in the alcohol release valve of the synthesis system, or the operators are not diligent enough; fearing accidents caused by liquid presence, they open the alcohol release valve wider, which results in syngas entering the storage tank along with methanol. This leads to a loss of syngas and a decrease in system pressure, as well as a drop in the inlet pressure ； 4. The system circulation rate increases; even after adjustment via branch valves, it is difficult to observe quantitatively when the valves are in an open position ； After replacing the valve or impeller of the circulator, the air induction capacity increases, which causes a change in the system’s synthesis volume and results in low system pressure.

If a sudden or gradual drop in the inlet pressure of the synthesis tower is detected during operation, it should be taken seriously and the cause identified. (1) A sudden decrease in the amount of fresh gas will cause a drop in the pressure at the inlet of the synthesis tower. (2) Loss of control over the liquid level in the crude methanol separator caused gas leakage. (3) Leaks caused by damage to the equipment and pipelines of the synthesis system. (4) The pressure gauge is malfunctioning.

If a sudden or gradual drop in the inlet pressure of the synthesis tower is detected during operation, it should be taken seriously and the cause identified. (1) A sudden decrease in the amount of fresh gas will cause a drop in the pressure at the inlet of the synthesis tower. (2) Loss of control over the liquid level in the crude methanol separator caused gas leakage. (3) Leaks caused by damage to the equipment and pipelines of the synthesis system. (4) The pressure gauge is malfunctioning.

If a sudden or gradual drop in the inlet pressure of the synthesis tower is detected during operation, it should be taken seriously and the cause identified. (1) A sudden decrease in the amount of fresh gas will cause a drop in the pressure at the inlet of the synthesis tower. (2) Loss of control over the liquid level in the crude methanol separator caused gas leakage. (3) Leaks caused by damage to the equipment and pipelines of the synthesis system. (4) The pressure gauge is malfunctioning.

1. Low intake air volume； ? 2. After replacing with a new catalyst, the catalyst exhibits good activity and a high synthesis efficiency; as a result, the inlet pressure also decreases accordingly ； The overall pressure is low, so the inlet pressure also decreases accordingly ； ? 3. There is internal leakage in the alcohol release valve of the synthesis system, or the operators are not diligent enough; fearing accidents caused by liquid presence, they open the alcohol release valve wider, which results in syngas entering the storage tank along with methanol. This leads to a loss of syngas and a decrease in system pressure, as well as a drop in the inlet pressure ； ? 4. The system circulation rate increases; after adjustment via the branch valve, it is difficult to observe quantitatively due to the size of the valve ； After replacing the valve or impeller of the circulator, the air induction capacity increases, which causes a change in the system’s synthesis volume and results in low system pressure.

(1) A sudden decrease in the amount of fresh gas will cause a drop in the pressure at the inlet of the synthesis tower. (2) Loss of control over the liquid level in the crude methanol separator caused gas leakage. (3) Leaks caused by damage to the equipment and pipelines of the synthesis system. (4) The pressure gauge is malfunctioning.

1. Low intake air volume； 2. After replacing it with a new catalyst, the catalyst exhibits good activity and a high synthesis efficiency; as a result, the inlet pressure also decreases accordingly ； The overall pressure is low, so the inlet pressure also decreases accordingly ； 3. There is internal leakage in the alcohol release valve of the synthesis system, or the operators are not diligent enough; fearing accidents caused by liquid presence, they open the alcohol release valve wider, which results in syngas entering the storage tank along with methanol. This leads to a loss of syngas and a decrease in system pressure, as well as a drop in the inlet pressure ； 4. The system circulation rate increases; even after adjustment via branch valves, it is difficult to observe quantitatively when the valves are in an open position ； After replacing the valve or impeller of the circulator, the air induction capacity increases, which causes a change in the system’s synthesis volume and results in low system pressure.

1. A sudden decrease in the amount of fresh gas can cause a drop in the pressure at the inlet of the synthesis tower. 2. Loss of control over the liquid level in the crude methanol separator can lead to gas leakage. 3. Damage to the equipment and pipelines in the synthesis system can result in leaks. 4. Faulty pressure gauges

(1) A sudden decrease in the amount of fresh gas will cause a drop in the pressure at the inlet of the synthesis tower. (2) Loss of control over the liquid level in the crude methanol separator caused gas leakage. (3) Leaks caused by damage to the equipment and pipelines of the synthesis system. (4) The pressure gauge is malfunctioning.

1) A sudden decrease in the amount of fresh gas will cause a drop in the inlet pressure of the synthesis tower. (2) Loss of control over the liquid level in the crude methanol separator caused gas leakage. (3) Leaks caused by damage to the equipment and pipelines of the synthesis system. (4) The pressure gauge is malfunctioning.