有機廢氣處理設備在用多孔性固體物質處理流體混合物時,流體中的某一組分或某些組分可被吸表面并濃集其上,此現象稱為吸附。吸附處理廢氣時,吸附的對象是氣態污染物,氣固吸附。被吸附的氣體組分稱為吸附質,多孔固體物質稱為吸附劑。
固體(ti)表(biao)面(mian)(mian)(mian)吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)了吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)質(zhi)(zhi)后,一(yi)(yi)部被(bei)吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)的吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)質(zhi)(zhi)可從吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)劑表(biao)面(mian)(mian)(mian)脫離,此現附(fu)(fu)(fu)(fu)(fu)。而當吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)進行一(yi)(yi)段時(shi)間后,由于表(biao)面(mian)(mian)(mian)吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)質(zhi)(zhi)的濃集(ji),使(shi)其(qi)吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)能力(li)明(ming)顯(xian)下降而吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)凈(jing)化的要(yao)求,此時(shi)需要(yao)采用(yong)(yong)一(yi)(yi)定(ding)的措施使(shi)吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)劑上已吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)的吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)質(zhi)(zhi)脫附(fu)(fu)(fu)(fu)(fu),以(yi)協(xie)的吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)能力(li),這個(ge)過程稱為吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)劑的再生。因此在實際吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)工程中(zhong),正是利用(yong)(yong)吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)一(yi)(yi)再生一(yi)(yi)再吸(xi)(xi)(xi)(xi)附(fu)(fu)(fu)(fu)(fu)的循環過程,達到除去廢氣中(zhong)污染(ran)物質(zhi)(zhi)并回收廢氣中(zhong)有用(yong)(yong)組(zu)分。