www.4hu影院-www.4虎-www.4虎影院-www.87福利-日本不卡视频一区二区三区-日本不卡视频在线

Heat exchange reactors are also called non-adiabatic variable temperature reactors, and their structure is mostly similar to shell and tube heat exchangers. The catalyst can be placed in the tube or between the tubes, but the latter is less common. The gas of the heat exchange fixed-bed reactor flows down into the catalyst bed from the top of the reactor and flows out at the bottom. In actual production, most of them use a top-down flow method.