固(gu)定床反應(ying)(ying)(ying)器(qi)(qi)底部通(tong)常要(yao)(yao)設(she)(she)置催(cui)化(hua)劑(ji)卸(xie)料口(kou)，在催(cui)化(hua)劑(ji)老化(hua)失活(huo)時將其卸(xie)出。反應(ying)(ying)(ying)器(qi)(qi)支(zhi)撐(cheng)(cheng)形(xing)式(shi)不同(tong)，催(cui)化(hua)劑(ji)卸(xie)料口(kou)設(she)(she)計形(xing)式(shi)也不同(tong)。常見的(de)設(she)(she)計形(xing)式(shi)主(zhu)要(yao)(yao)有三種，見圖6.9。對于(yu)圖6.9（a）所示(shi)形(xing)式(shi)卸(xie)料口(kou)，卸(xie)料過(guo)程中(zhong)，只需要(yao)(yao)將法蘭蓋打開(kai)，將塞子拔出，催(cui)化(hua)劑(ji)依靠(kao)重力從反應(ying)(ying)(ying)器(qi)(qi)中(zhong)自流出來，操作簡(jian)單(dan)方(fang)便。對于(yu)圖6.9（b）所示(shi)形(xing)式(shi)卸(xie)料口(kou)，卸(xie)料過(guo)程需要(yao)(yao)人(ren)工輔(fu)助卸(xie)料。這(zhe)兩種形(xing)式(shi)主(zhu)要(yao)(yao)用(yong)(yong)于(yu)反應(ying)(ying)(ying)器(qi)(qi)采用(yong)(yong)裙(qun)座作為支(zhi)撐(cheng)(cheng)結構。當反應(ying)(ying)(ying)器(qi)(qi)采用(yong)(yong)支(zhi)耳支(zhi)撐(cheng)(cheng)時，多采用(yong)(yong)圖6.9（c）所示(shi)形(xing)式(shi)設(she)(she)計催(cui)化(hua)劑(ji)卸(xie)料口(kou)。

  無論反應器催(cui)化劑卸料口(kou)(kou)采用何種形式，均需要將卸料口(kou)(kou)布置在靠近催(cui)化劑裝卸區一側，卸料口(kou)(kou)高度(du)應滿足規范要求。