Process Analysis And Optimization Of Separating And Purifing Carbon Monoxide By Pressure Swing Adsorption (PSA)

PSA (Pressure Swing Adsorption, PSA) technology, operation simple, feed gas source adapt to a wide range, is an energy-efficient gas separation technology in petroleum chemical industry, environmental protection and other areas. This paper describes a chemical plant produce 300,000 tons of ethyl acetate supporting 70000Nm3/h PSA unit which purifies carbon monoxide.It describes process operation, the ongoing transformation and the results. By adjusting the cycle time, changing time order, adjusting the delay time and action time of public valve to handle the unstable CO2 purity of rough decarbonization step, to control the high CO2 content of purification gas. By increasing the buffer tank and self-adjusting valve to stable the pressure of hydrogen production. By adjusting process, changing catalyst, the sulfur concentration step concentrates the gas of H2S and makes use of most of the vent gas. This paper describes the transformation measures for further. By increasing compressors and using the way of vacuum to reduce the CO2 content of the CO gas. Increas the pipeline and valve in the system, according to different sources of feed gas select process and the time order. Because moisture content spends effect of the adsorbent powder, so think that install coke filter after entering the section on gas pipeline. Protect sealing surface during install and use of program-controlled valve. Part of the valve install limiting orifice to reduce erosion to sealing surface and extend the using period. Since October 2008 has been put into operation, the chemical plant of pressure swing adsorption system once again proved the advantages in the gas separation system.