PSA with vacuum pumping
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What is the function of the PSA in the isobutane dehydrogenation unit as a vacuum pump? An introduction to the operating principle of this type of PSA
Its function is to reduce pressure, facilitating desorption! It is generally used in situations where the adsorption pressure is not high and the impurity content in the raw material is high. For example, to recover H2 from refinery dry gas, a vacuum extraction process is commonly used.
Reducing the pressure in the adsorption tower causes the impurities to be released; the principle is that, at the same temperature, different pressures result in varying adsorption capacities for different substances
Domestic adsorbents are not effective; impurities can only be removed under negative pressure, which is why vacuum pumping is used
For separation processes in which adsorbed impurities (hydrocarbons) are difficult to remove, vacuum pumping is generally required to ensure thorough regeneration of the adsorbent. In systems such as PSA for hydrogen production, impurities other than hydrogen can be removed relatively easily, so a vacuum pump is generally not required.
For hydrogen production processes such as those used by Huaxi and Tianyi, they are developed by these companies themselves; are the catalysts imported or domestically produced?
I don’t know how the hydrogen production process came about, but the adsorption catalysts are all produced by their own catalyst factories (or those with which they cooperate)
There is an additional vacuum pump, and the programmable valve includes functions for vacuum flushing and vacuum creation
The adsorbent is domestically produced. The analysis quality is not very good, so vacuum pumping equipment is used; abroad, vacuum pumping is not employed as it can lead to safety accidents
How to put it? ? ? Can safety accidents occur easily when evacuating air? ?