Low temperature methanol washing for long term parking

From the perspective of equipment safety during long-term parking, it is best to completely flash the liquid level in each ammonia cooler! !

After long-term parking, the temperature of the solution will rise to normal temperature, and the liquid ammonia that exchanges heat with the solution will evaporate. If the gaseous ammonia formed by evaporation has no outlet, the pressure will rise, and it will rise to more than ten kilograms at normal temperature. Will it be unsafe? In addition, you can also take the opportunity to evaporate the ammonia and drain the accumulated water in the ammonia cooler.

The liquid ammonia in the ammonia cooler must be completely flashed during long-term shutdown. On the one hand, it is convenient for maintenance, and on the other hand, each ammonia cooler can be drained to facilitate the next start-up of the ammonia system, which will be better.

You said, "When the vehicle is parked for a long time, the temperature of the solution will rise to normal temperature, and the liquid ammonia that exchanges heat with the solution will evaporate. If the gaseous ammonia formed by evaporation has no outlet, the pressure will rise, and it will rise to more than ten kilograms at normal temperature. Will it be unsafe? In addition, to evaporate the ammonia, you can also take the opportunity to drain the accumulated water in the ammonia cooler." What I want to ask is, where is the accumulated water in the ammonia cooler? and water and ammonia are 1: If the ratio of 500 is soluble in each other, how can there be water accumulation? Please explain! !

Complete flash evaporation is required, which is beneficial to equipment maintenance. It is also helpful to drain away the dirty ammonia liquid in the equipment.

Needed in the long term, not needed in the short term! ! !

Asked on the 5th floor in reply to Shujian's post on the 3rd floor, you said, "When parking for a long time, the temperature of the solution will rise to normal temperature, and the liquid ammonia that exchanges heat with the solution will evaporate. If the gaseous ammonia formed by evaporation has no outlet, the pressure will rise, and it will rise to more than ten kilograms at normal temperature. Will it be unsafe? In addition, to evaporate the ammonia, you can also take the opportunity to drain the accumulated water in the ammonia cooler." What I want to ask is, where is the accumulated water in the ammonia cooler? and water and ammonia are 1: If the ratio of 500 is soluble in each other, how can there be water accumulation? Please explain! ! The latest rating record of this post. Rater: z880347730 Fortune +5 Date of active participation: 2009-4-15 12:18 Rater: zxs Fortune +1 Date of in-depth consideration: 2009-4-15 12:11 Reply to Floor 5 There is now a process that does not rely on ice machine compression, but uses distillation. Just like methanol distillation, when the ammonia is not pure enough, it will bring a part of water instead of oil. The ammonia cooler relies on the conversion of liquid ammonia into gas ammonia to take away heat. The ammonia is then dissolved in water. The water in the ammonia cooler will not volatilize into steam because the temperature is not reached, so it needs to be drained regularly to increase the cooling effect. I’m not sure if it’s correct, please give me some advice. 1 This post was last edited by The Earth Every Day on 2009-4-17 17:19 ]

If it is parked for a long time: it is better to completely flash the liquid level in each ammonia cooler.

When the ammonia pressure increases, the boiling point of liquid ammonia will also increase, and the liquid ammonia will no longer flash, so the pressure will not increase.

The ammonia ice machine needs to be stopped for a long period of time, so the liquid ammonia must be evaporated and recycled to the ammonia storage tank. Otherwise, the pressure in the gas ammonia pipeline of the methanol washing system will reach more than ten kilograms, which will cause trouble when starting the ammonia ice machine system.

To clean the equipment after evaporation, it is more reasonable to replace the water drain mentioned on the 5th floor with oil drain, if the refrigeration uses a compression process. Ammonia carrying oil is inevitable, and this problem has also occurred on site. Now some designs are specially equipped with a small oil drain tank.

The long-term shutdown has evaporated the liquid level of the ammonia cooler. Our factory is currently undergoing a major overhaul. The liquid levels of several ammonia coolers are all around 60%. It will take 3 months to inspect. We have no choice but to install a temporary pipeline to pour all the liquid ammonia from the ammonia cooler into the liquid ammonia storage tank and store it.

If the ammonia cooler is parked for a long time, the liquid ammonia in the ammonia cooler should be flash-vaporized, which is convenient for maintenance. If it is not drained cleanly, the temperature of the solution will rise to normal temperature and the liquid ammonia will evaporate, which is unsafe. When parking for a long period of time, all media in the system must be drained.

Yes. Long-term parking must be completed by flash evaporation. . The remaining sewage ammonia must also be discharged, and there is usually a pipeline dedicated to discharging ammonia.