在用(yong)多(duo)孔性(xing)固(gu)體(ti)物(wu)(wu)質(zhi)處理流體(ti)混合物(wu)(wu)時(shi)(shi),流體(ti)中的某一組分或某些組分可被(bei)吸(xi)(xi)表面(mian)并(bing)濃集其上,此現象稱(cheng)為吸(xi)(xi)附(fu)。吸(xi)(xi)附(fu)處理廢氣時(shi)(shi),吸(xi)(xi)附(fu)的對象是氣態(tai)污染物(wu)(wu),氣固(gu)吸(xi)(xi)附(fu)。被(bei)吸(xi)(xi)附(fu)的氣體(ti)組分稱(cheng)為吸(xi)(xi)附(fu)質(zhi),多(duo)孔固(gu)體(ti)物(wu)(wu)質(zhi)稱(cheng)為吸(xi)(xi)附(fu)劑(ji)。
固(gu)體表面(mian)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)了吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)質(zhi)(zhi)后(hou),一(yi)部被吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)的(de)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)質(zhi)(zhi)可從(cong)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)劑表面(mian)脫離,此現附(fu)(fu)。而(er)(er)當吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)進行一(yi)段(duan)時(shi)間后(hou),由于表面(mian)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)質(zhi)(zhi)的(de)濃集,使(shi)其(qi)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)能(neng)力(li)明顯(xian)下降而(er)(er)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)凈化的(de)要求,此時(shi)需要采用(yong)一(yi)定的(de)措施使(shi)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)劑上已吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)的(de)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)質(zhi)(zhi)脫附(fu)(fu),以(yi)協的(de)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)能(neng)力(li),這個過程(cheng)(cheng)稱為(wei)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)劑的(de)再生。因此在實際(ji)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)工程(cheng)(cheng)中,正(zheng)是利用(yong)吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)一(yi)再生一(yi)再吸(xi)(xi)(xi)(xi)(xi)附(fu)(fu)的(de)循環過程(cheng)(cheng),達到(dao)除去廢氣中污染(ran)物質(zhi)(zhi)并回(hui)收廢氣中有用(yong)組分。