What are the reasons for a decrease in the inlet pressure of the synthesis tower?

Reason: 1. Influenced by previous processes such as gasification, purification, or air separation for gas production, the amount of syngas is low, which affects the pressure entering the tower. 2. The poor working efficiency of the gas compression machinery results in an inability to deliver sufficient volume of gas, leading to low pressure at the tower inlet. 3. The effective gas components in the syngas are low; after purification, the gas volume is small and the pressure entering the tower is low. 4. Other reasons from previous processes affect the gas volume, resulting in low pressure at the inlet to the tower.

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; 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 delivery volume 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 flowing in can cause a drop in the pressure at the inlet of the synthesis tower; this is mainly due to compressor failures that lead to shutdowns. (2) Uncontrolled liquid levels in the crude methanol separator, which result in gas leakage, can also cause a drop in the pressure at the inlet of the synthesis tower. (3) Damage to equipment or pipelines in the compression or synthesis section, leading to leaks, can likewise cause a drop in the pressure at the inlet of the synthesis tower. (4) Sometimes, the drop in pressure at the inlet of the synthesis tower occurs slowly, and this situation should also be taken seriously; it is necessary to check whether there are any faults with the compressor valves and pistons, whether there are any leaks in the system, and to verify whether the pressure gauges are functioning properly.

What are the reasons for a decrease in the inlet pressure of the synthesis tower? Answer: 1. If factors such as gasification, purification, or air separation in the previous stage affect the amount of syngas, it will lead to a decrease in the pressure entering the tower ； 2. The poor working efficiency of the gas compression machinery results in an inability to deliver the required amount of gas, leading to low pressure at the tower inlet ； 3. The effective gas components in the syngas are of poor quality; after purification, the volume of gas decreases, resulting in low pressure at the inlet to the tower ； 4. Load reduction due to issues in the previous section or other reasons affect the gas flow rate, resulting in low pressure at the inlet to the tower.