Φ7米玻(bo)璃(li)鋼脫(tuo)(tuo)硫(liu)塔(ta)(ta)太京煙氣進入脫(tuo)(tuo)硫(liu)塔(ta)(ta)，與(yu)自上而(er)下(xia)噴淋的(de)堿性石灰石漿液霧滴逆流接觸，其中(zhong)的(de)酸性氧(yang)化物SO2以及(ji)其他污染物HCL、HF等被吸收，吸收SO2后的(de)漿液反(fan)應生成CaSO3，通過就地(di)強(qiang)制(zhi)氧(yang)化、結晶生成CaSO4•2H2O，經脫(tuo)(tuo)水(shui)后得到脫(tuo)(tuo)硫(liu)副(fu)產(chan)品—石膏，實現(xian)含硫(liu)煙氣的(de)綜合治理。Φ7米玻(bo)璃(li)鋼脫(tuo)(tuo)硫(liu)塔(ta)(ta)以NaOH(Na2CO3)脫(tuo)(tuo)硫(liu)，脫(tuo)(tuo)硫(liu)液中(zhong)主(zhu)要為NaOH(Na2CO3)水(shui)溶液，在循環(huan)過程(cheng)中(zhong)對水(shui)泵、管道、沖刷及(ji)堵塞，便(bian)于設備(bei)運行和維護(hu)。

玻璃鋼脫硫塔雙堿法煙氣(qi)脫硫工藝(yi)同石(shi)(shi)灰(hui)石(shi)(shi)/石(shi)(shi)灰(hui)等其他濕法脫硫反應機理(li)類似，主要反應為煙氣(qi)中(zhong)的SO2先溶解于吸收液(ye)中(zhong)，然后(hou)離解成H+和HSO3—；

SO2(g)===SO2(aq)（1）

SO2(aq)+H2O(l)===H++HSO3—===2H++SO32－；（2）

式（1）為慢反應(ying)，是(shi)速度控制過程之一。然(ran)后H+與溶液中的(de)OH－中和反應(ying)，生(sheng)成鹽和水，SO2不斷被吸收溶解。反應(ying)方程式如下：

2NaOH+SO2→Na2SO3+H2O

Na2SO3+SO2+H2O→2NaHSO3

脫(tuo)硫塔太京脫(tuo)硫后(hou)的反(fan)(fan)應產物進(jin)(jin)入池內用另一(yi)種堿，一(yi)般是(shi)Ca(OH)2進(jin)(jin)行，反(fan)(fan)應過程(cheng)如下(xia)：

Ca(OH)2+Na2SO3→2NaOH+CaSO3

Ca(OH)2+2NaHSO3→Na2SO3+CaSO3•1/2H2O+1/2H2O

存在氧氣的條件下，還會發生以下反應：

Ca(OH)2+Na2SO3+1/2O2+2H2O→2NaOH+CaSO4•H2O

Φ7米(mi)脫硫塔物理過程原理

SO2吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)是從氣相(xiang)(xiang)傳遞到(dao)液相(xiang)(xiang)的相(xiang)(xiang)間(jian)傳質(zhi)(zhi)過程，氣體(ti)吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)質(zhi)(zhi)在單(dan)(dan)位時間(jian)內通過單(dan)(dan)位面(mian)(mian)積界面(mian)(mian)而被(bei)吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)劑吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)的量稱(cheng)為吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)速(su)(su)率(lv)。根據雙膜理論，在穩定吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)操作中，從氣相(xiang)(xiang)傳遞到(dao)界面(mian)(mian)吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)質(zhi)(zhi)的通量等于從界面(mian)(mian)傳遞到(dao)液相(xiang)(xiang)主(zhu)體(ti)吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)質(zhi)(zhi)的通量。Φ7米(mi)玻璃鋼脫硫塔太京(jing)吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)傳質(zhi)(zhi)速(su)(su)率(lv)方程一般表達式為：吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)速(su)(su)率(lv)=吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)推動力×吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)系數，或者(zhe)吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)速(su)(su)率(lv)=吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)推動力/吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)阻力。吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)系數和吸(xi)(xi)(xi)(xi)收(shou)(shou)(shou)(shou)阻力互為倒數。