Alcohol Dehydration Process Principle

Alcohol Dehydration Process Principle

The molecular sieve adsorption method is a technology that uses molecular sieve to adsorb and desorb water from the feed ethanol vapor. The adsorption separation of the gas mixture is realized in a fixed adsorption bed. Pack one or more adsorbents in the adsorbent bed. After the mixed gas enters the adsorbent bed under a certain pressure, due to the difference in adsorption characteristics of the gas components, different components form adsorption enrichment zones at different positions of the adsorbent bed. The strongest adsorption component is concentrated at the inlet end of the adsorption bed, the weakest adsorption component is concentrated at the outlet end of the adsorption bed, and the enrichment zone of the remaining components is distributed in the middle of the adsorption bed according to the difference in adsorption capacity. Due to the difference in the adsorption characteristics of the gas components on the adsorbent, we can use this difference to achieve the purpose of separating the gas mixture.

放壓:

After the adsorption bed completes the adsorption process under a certain pressure, the adsorbed components are desorbed by depressurization (usually reduced to close to atmospheric pressure). The natural pressure release method is adopted, the degree of pressure release is limited, the adsorbed components cannot be fully desorbed, and the regeneration of the adsorbent is not complete.

抽真空:

After the adsorption bed drops to atmospheric pressure, in order to further reduce the partial pressure of the adsorbed components, the method of evacuation can be used to further reduce the pressure of the adsorption bed to a vacuum state, so that the adsorbed components are fully desorbed.

The automatic control valve and the corresponding control system configuration of the system can easily and automatically realize the adsorption of molecular sieve adsorption, alternate drying and regeneration of each molecular sieve adsorption bed. Make the whole process complete automatically, without any on-site operation by the operator.

〖Device Characteristics〗

After preheating and overheating, the raw material alcohol enters the temperature swing adsorption bed, and goes out of the adsorption tower as anhydrous alcohol. After the adsorption is saturated, it is subjected to reverse discharge and evacuation analysis, and then the final charge completes the preparation and enters the next cycle. The main features are as follows: 1.The method of pumping down analysis is adopted to reduce the amount of light alcohol and reduce the energy consumption of the device. 2.TSA fully automatic control, simple device operation. 3.Special control valve is used to ensure smooth and normal operation of the device. 〖Performance〗 Yield：On demand Press：0～0.4 MPa Purity：Up to 99.95%