What is the purpose of the water seal in a gas holder?

This post was last edited by pyp222 on 2017-3-17 at 16:32. The water seal in the gas tank is supposed to prevent overpressure in the tank. A liquid column of a certain height is established in the water seal, and a pipeline connects the gas tank to the water seal. When the gas tank experiences overpressure, it will break through the water seal to allow air to escape, thereby preventing overpressure in the gas tank. By adjusting the height of the liquid column simultaneously, the pressure in the gas tank can be controlled.

Use water as a medium to seal the gas in the gas holder.

The gas holder has a water seal, and the flare has a water seal. The pressure of the two water seals is used to control the intake cabinet and the flare inlet. The water seal of the gas holder also serves to remove dust.

This is a bit too general; it depends on which water seal is involved. The water seals around the gas tank serve a sealing purpose, and they also release fluid in case of overpressure, acting as a sort of alarm mechanism as well

Function of the water seal in the gas holder: 1. Prevent over-pressurization and under-pressurization. 2. Prevent gas leakage.

I’ve learned it, thank you......

This post was last edited by wlq1970 on 2017-3-18 at 08:55. First, it is necessary to clarify the types: gas holders are classified into double-membrane dry type, dry type, wet type, Mann type, and high-pressure type. When used for storing gas in systems involving coal crushing and pressurized gasification, wet-type gas holders are typically employed for gas storage. A wet-type gas holder consists of a water seal tank and a bell jar. A bell jar is a cylindrical container without a bottom that can move up and down. When a large amount of gas needs to be stored, the bell jar can be changed from a single-layer structure to a multi-layer sleeve design, with each layer sealed to the next by water-filled annular grooves. The gas tank is a atmospheric pressure tank of the floating-roof type, floating on a spiral track; it is equipped with maximum and minimum limit switches, which serve as low-alarm and high-alarm devices. During normal operation, as the amount of gas entering the tank changes, the tank floats upward, so the bottom of the tank is filled with water all the way up to its highest position, with the excess water overflowing. This arrangement serves both a sealing purpose and a protective function, preventing gas from flowing back during maintenance or when the high-alarm condition is triggered.

It normally prevents gas from escaping, and in abnormal situations, it prevents air from being drawn into the gas system.

Does negative pressure also provide a protective effect?