Things to note when cleaning gas guides with low-temperature methanol

Gas connection method: First, use the bypass valve of the inlet section to equalize the pressure. When the system pressure and the conversion pressure are balanced, open the inlet section valve, and at the same time set the pressure setting value slightly higher (about 0.1 MPa), and the self-adjusting valve will turn on automatically (but manual operation is more stable), and then Slowly open the post-purification self-regulating pressure valve to keep the pressure of the front and rear systems stable. Note that the valve opening speed must be slow. When the post-purification self-regulating pressure valve continues to open, the conversion pressure self-regulating valve will continue to automatically close. When the post-conversion pressure self-regulating valve gradually closes, the purification system is connected! Things to note: 1. The air connection speed should be appropriately slow and not too fast. ； 　　　　　2. Keep the air connection speed even and don’t be too fast or too slow. ； (Poor control of these two points will cause the system liquid level to fluctuate too much, making it difficult to adjust) 3. During the gas connection process, the gas will hold the solution on the tray as it rises, and the liquid level at the bottom of the tower will continue to drop (if the automatic operation is turned on, the self-adjusting valve will even close). At this time, it is necessary to lower the liquid level setting value to maintain normal solution circulation. When the gas connection reaches a certain level, the liquid level at the bottom of the tower will rise. At this time, gradually change the liquid level settings back to the original values. ； (The same applies to other towers) 4. The obvious absorption process will not occur until a short time after the gas is connected. The temperature at each point of the absorption tower will rise very quickly. The high system temperature may cause the carbon dioxide in the purified gas to exceed the standard. However, at this time, it is too late to rely solely on the ammonia cooler to supply ammonia to provide cooling, so it is necessary to appropriately increase the circulation volume to control the purified gas indicators. ； (When the system has sufficient cold supply and the temperature drops to the normal index, the circulation volume of the purified gas is high or even the carbon dioxide index is low, so the circulation volume is reduced to the normal value at this time.) 5. After the gas connection is completed, the purified gas is notified to be analyzed. After at least two consecutive analyzes and the analysis is qualified, the synthetic gas can be supplied. ； 　　　　　6. After the gas connection is completed, the system temperature will first increase and then decrease. During this process, the cooling capacity must be added or subtracted in time to maintain the balance of the system's cooling capacity and control the purified gas index to meet the standards. I don’t agree with my personal opinion, please share my opinion more!

During the gas connection process, we mainly follow the principle of slowly increasing the process gas volume in small amounts many times~! and system pressure! Pay attention to the liquid level of each tower. During the gas guiding process, the most methanol washing operation is the liquid level of each tower~! Just keep the liquid level of each tower stable and the temperature of the absorption tower

First, make sure that the nitrogen flushing is closed, and then when conducting gas guidance, pay attention to the liquid level of each tower, system temperature, ice machine load, methanol circulation volume, amount of gas stripping nitrogen, steam volume of the water separation tower and thermal regeneration tower.

Are all the large valves in your process sections automatic? Also, how long does it take for you to recharge? One more question! What do you need to pay attention to when purifying the air supplied to the synthesis section, and let’s talk about the specific steps! ! Thanks! ! !

Our large valve in the work section is an electric two-position valve. Generally, the length of purification and air connection time is related to the air volume, and also depends on personal experience and proficiency. The specific time is hard to say and varies from person to person! When purifying and supplying gas to the synthesis, all you need to do is control the system pressure while ensuring the purified gas indicators! There seems to be nothing to pay attention to now!

When conducting gas. Prevent high and low strings. When the front system is supplying air. Be careful not to make the pressure difference too large. Balance your stress.

What this master said is very useful, thank you very much. 286041677 is my QQ number. Could you please leave me your contact information? If you have any problems in the future, you can ask me for advice.