在用多孔(kong)(kong)性固(gu)體物(wu)質處(chu)理流體混(hun)合物(wu)時,流體中的某(mou)(mou)一組(zu)分(fen)(fen)或(huo)某(mou)(mou)些組(zu)分(fen)(fen)可(ke)被(bei)(bei)吸(xi)(xi)(xi)表面并(bing)濃集其上,此現象稱為吸(xi)(xi)(xi)附(fu)。吸(xi)(xi)(xi)附(fu)處(chu)理廢(fei)氣(qi)(qi)時,吸(xi)(xi)(xi)附(fu)的對象是(shi)氣(qi)(qi)態(tai)污染物(wu),氣(qi)(qi)固(gu)吸(xi)(xi)(xi)附(fu)。被(bei)(bei)吸(xi)(xi)(xi)附(fu)的氣(qi)(qi)體組(zu)分(fen)(fen)稱為吸(xi)(xi)(xi)附(fu)質,多孔(kong)(kong)固(gu)體物(wu)質稱為吸(xi)(xi)(xi)附(fu)劑。
固體(ti)表(biao)(biao)面(mian)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)了吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)質(zhi)后(hou),一(yi)部被(bei)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)的(de)(de)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)質(zhi)可從吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)劑(ji)表(biao)(biao)面(mian)脫(tuo)離,此(ci)現附(fu)(fu)(fu)。而(er)當吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)進行(xing)一(yi)段時(shi)間后(hou),由于表(biao)(biao)面(mian)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)質(zhi)的(de)(de)濃集,使(shi)其吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)能力明(ming)顯下降而(er)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)凈(jing)化的(de)(de)要求,此(ci)時(shi)需要采用一(yi)定的(de)(de)措施使(shi)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)劑(ji)上已(yi)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)的(de)(de)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)質(zhi)脫(tuo)附(fu)(fu)(fu),以協的(de)(de)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)能力,這個過程稱為吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)劑(ji)的(de)(de)再生。因此(ci)在(zai)實際吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)工程中(zhong)(zhong)(zhong),正(zheng)是(shi)利用吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)一(yi)再生一(yi)再吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)(fu)的(de)(de)循(xun)環過程,達到除去廢(fei)(fei)氣(qi)中(zhong)(zhong)(zhong)污(wu)染物(wu)質(zhi)并回收廢(fei)(fei)氣(qi)中(zhong)(zhong)(zhong)有用組分。