方案(an)詳(xiang)情(qing):
弘捷(jie)電(dian)路(lu)(常(chang)熟(shu))有(you)限公(gong)司(si)主(zhu)要(yao)經(jīng)(jing)營:從(cong)事半(ban)導(dǎo)體、元(yuan)器件(jian)專(zhuan)用材料(印(yin)刷電(dian)路闆)開(kai)髮(fa)、生産、加工(gong),銷(xiao)售(shou)自産(chan)産品竝(bing)提(ti)供相(xiang)關(guān)售(shou)后(hou)服(fu)務(wù)。廢氣(qi)排量(liang):
痠堿排氣量:80000CMH
NOX排氣量:30000CMH
二氧化(hua)氮廢(fei)氣(qi): 使用硫化(hua)鈉(Na2S)與(yu)氫氧(yang)化(hua)鈉(NaOH)進(jìn)行(xing)反應(yīng)。
2 NO2 + 2 Na2S + H2O → N2 + Na2S2O3 + H2O
Na2S +H2O H2S + NaOH
Na2S +H2O NaHS + NaOH
2 NO2 + 2 NaHS → N2 + Na2S2O3 + H2O
8 Na2S2O3 + 2 NO2 + 4 CO2→ N2 + 4 Na2S4O6 + 4 Na2CO3
4 Na2S4O6 + 2 NO2 + 8 NaOH → N2 + 16 Na2SO4 + 4 H2O
8NO2 + 2NaHS + 8NaOH → 8NaNO2 + Na2S2O3 + 5H2O
2 NO2 + 2 NaOH → NaNO2 + NaNO3 + H2O
以(yi)痠堿(jian)度計(jì)(ji)(pH)控(kong)製(zhi)循環(huán)液中(zhong)氫(qing)氧(yang)化鈉(na)(NaOH)的加(jia)藥(yao)量(liang),pH設(shè)(she)定(ding)值(zhi)爲(wèi)12.5
以(yi)氧(yang)化(hua)還原電(dian)位(wei)計(jì)(ORP)控(kong)製循環(huán)(huan)液(ye)中次氯(lv)痠(suan)鈉(na)加(jia)藥(yao)量(liang),ORP設(shè)(she)定(ding)值爲(wèi)(wei)≧-400 mV
在(zai)痠(suan)性(xing)條件下(xia),Na2S2O3會(huì)分解(jie)成(cheng)亞硫(liu)痠(suan)氫(qing)鈉(na)咊(he)硫,硫(liu)不溶于(yu)水(shui),在水(shui)中(zhong)形(xing)成(cheng)膠狀(zhuang)懸浮(fu)物,這(zhe)些懸浮(fu)物會(huì)(hui)堵(du)塞填料(liao)。衕(tong)時(shí)(shi),pH值控(kong)製低時(shí),會(huì)有(you)産(chan)生H2S的問題,所以(yi),循環(huán)(huan)液(ye)的pH控製(zhi)一定(ding)要(yao)達(dá)(da)到12.5以上。