How to choose a drying system for an air compressor station?
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The design institute requires that the air pressure dew point of our company be at -50°C; which drying system would be appropriate in this case? This post was last edited by chinazwr on 2009-4-30 07:41
Freeze-drying combined with adsorption drying should work; products are available both domestically and internationally
Adsorption drying can achieve an air dew point of less than -70 degrees. The adsorber uses 4A molecular sieve. 2-tower or 3-tower process. It is sufficient to meet the requirements. The equipment requires low investment, and operating costs are also low. Ammonia cooling is an option as well, but it requires large investment and high operating costs. Ammonia cooling is suitable for large air separation units. For air compressor stations, a molecular sieve adsorber is sufficient.
The dew point at pressure is -50 degrees, which is a bit difficult. Freezing plus adsorption is also very difficult to achieve.
There is no problem at all; determine the appropriate amount of molecular sieve required to handle the gas volume, and use adsorption over a long period (8 hours). Two-tower process. It can meet the requirements. This post was last edited by maogenfu on 2008-3-17 21:37]
:handshake, learned something
Freezing followed by adsorption drying is no problem.
Equipped with a refrigerated dryer, oil filter, water filter, and heat-free (slightly heated) regenerative dryer
It’s better to use complete sets of equipment directly! The reasons are as follows: 1. There are many manufacturers of complete drying gas systems. 2. Air drying technology is mature. 3. There is no reason to order and design separate components for a system that already uses mature technology! -Unless it’s the full suite of technology provider!
-Compressed air with a dew point of 50 degrees must be dried by absorption using materials such as molecular sieves, activated alumina, silica gel, or combinations thereof. For drying, heat-free regeneration or mild heat regeneration is generally suitable; mild heat regeneration is recommended. Heat-free regeneration seems attractive as it appears to require no heating, but it results in greater losses of air after drying. To avoid excessive adsorption by the desiccant, frequent regeneration, and the associated costs of desiccant replacement, freeze-drying systems equipped with pre-dehydration are generally used to reduce the burden of adsorption drying. Currently, the technologies and devices for drying compressed air are quite mature, and there are many manufacturers in China that offer complete sets of such products. It is recommended that the person in question check these options and contact the manufacturers to make a selection based on their requirements.
A microheat dryer can be chosen; our unit uses a microheat dryer that employs molecular sieve desiccants, enabling a dew point of up to -50°C. However, the amount of air required for regeneration is by no means less than that of a heatless regeneration dryer. If high consumption of air for regeneration is not a concern, then a microheat regeneration dryer can be selected.