How to solve the problem of an inability to increase the pressure in the pressurized tower and an inability to raise the temperature in the atmospheric tower?
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The pressure in the methanol pressurization tower won’t increase, and the temperature in the atmospheric pressure tower won’t rise. What are some solutions?
Is the temperature of your pressure column at its lowest level? This also has an impact on the temperature of the atmospheric column.
It might be due to a low temperature at the bottom of the pressure tower. Increase the steam supply to the reboiler, and reduce the amounts of reflux and feed. The vent from the reflux tank should be closed completely. Use the output from the pressure tower to heat the atmospheric pressure tower; since the pressure and temperature in the pressure tower are low, the temperature in the atmospheric pressure tower will also be low.
Is there less steam flowing into the pressure tower, or is the drain valve for the condensate at your location clogged??
Could LZ please explain in detail why the pressure in the pressure tower cannot be increased? What attempts have you made? How about the way we discuss stress with you? What kind of result! ·
There are steam pipelines inside the atmospheric tower of the three-tower distillation unit; open them.
1. Use high-pressure nitrogen for technical upgrades. 2. Increase the heat source at the bottom of the tower. 3. Check whether the pressure valve of the pressurization tower has internal leakage
I’ve encountered that too, but as long as the product is of good quality, it doesn’t matter! ! It has been proven that a gauge pressure of 3.8 kilograms is sufficient
Increase the steam supply to the reboiler in the pressurized tower, while reducing the reflux flow from that tower, so as to increase the amount of methanol vapor supplied from the pressurized tower to the reboiler in the atmospheric pressure tower
1. As long as the distillation quality is satisfactory, lower pressure and temperature values are also acceptable. 2. Check and calibrate the thermometers and pressure gauges. 3. Increase the steam supply to the reboiler in the pressurized tower, while reducing the reflux flow in that tower. 4. Check the drain valve of the condensate.
Is the load not sufficient? The load is insufficient, steam consumption is low, and the pressure at the top of the tower is low. High-pressure nitrogen can be used to fill the tower under reduced pressure; once the pressure is sufficient, the temperature will rise naturally. The temperature of the atmospheric pressure tower is now normal. But it is essential to ensure proper control of tower pressure and the emission of non-condensable gases.
The pressure in the pressure tower is insufficient, and the temperature at the top of the tower is low; as a result, the heat load on the three towers is not enough, and it’s natural that the temperatures of these three towers cannot rise. The feed valves for the three towers can be set to manual mode, allowing for manual control of the feed volume to each tower. Also, increase the steam supply to raise the pressure of the reflux to the design value; if the reflux volume is too low, the pressure in both towers cannot increase
The pressure in the pressurized tower determines its gas phase temperature, which in turn affects the temperature of the atmospheric pressure tower. There are many factors that can prevent an increase in the pressure of the pressurized tower; 1. Check whether there are any leaks in the pressurized tower； 2. Steam addition amount ； 3. Is the liquid level in the pressure tower too high or too low? It is generally controlled at around 40-60% ； 4. Is nitrogen leaking into the tower? ； 5. Is the liquid level in the atmospheric pressure tower too high or too low?
But as long as the product is qualified, it doesn’t matter! ! I tried it once; a gauge pressure of 3.8 kilograms was sufficient. To make changes, adjust the methanol vapor
If the pressure in the pressurization tower doesn’t increase, it’s necessary to determine the cause; each specific problem needs to be addressed accordingly. All of the above makes sense
The pressure in the pressurized column is insufficient, while the pressure in the atmospheric column is high; the light components in the pre-column are not completely removed, the load on the atmospheric column is high; the quality of the crude alcohol is poor, and no side stream extraction is carried out.