本文選題：中溫蒸發(fā) + 脫硫廢水��； 參考：《煤炭學(xué)報(bào)》2017年07期

【摘要】：為研究中溫?zé)煔馀月氛舭l(fā)實(shí)現(xiàn)脫硫廢水"零排放"處理的干燥過程與產(chǎn)物特性,通過建立中試試驗(yàn)裝置,在真實(shí)煙氣環(huán)境下研究了中溫?zé)煔庹舭l(fā)脫硫廢水過程中的溫度變化、產(chǎn)物成分、表觀形貌及顆粒團(tuán)聚特性,結(jié)果表明,與低溫?zé)煔庀啾?中溫?zé)煔庹舭l(fā)脫硫廢水能夠靈活控制干燥塔出口煙溫,干燥過程溫度變化更為平緩,干燥更加迅速與可靠;脫硫廢水干燥產(chǎn)物主要是MgSO_4·H_2O,CaSO_4·0.5H_2O,NaCl,其顆粒為表面粗糙多孔或不完整的空心球體,且顆粒平均粒徑遠(yuǎn)大于粉煤灰平均粒徑;粉煤灰中摻入脫硫廢水干燥產(chǎn)物后,其比電阻隨溫度的升高先減少后略有增大,但在120℃后與原粉煤灰的比電阻差別不大;干燥過程中廢水霧滴與粉煤灰顆粒碰撞團(tuán)聚后形成鏈狀、球狀或者不規(guī)則簇狀團(tuán)聚物,使得顆粒粒徑進(jìn)一步增大,有利于靜電除塵的高效收集。蒸發(fā)過程中少量HCl析出對(duì)煙氣系統(tǒng)的影響以及干燥產(chǎn)物對(duì)粉煤灰綜合利用的影響可分別通過脫硫廢水調(diào)質(zhì)與增加單獨(dú)收塵設(shè)備進(jìn)行解決。
[Abstract]:In order to study the drying process and product characteristics of flue gas bypass evaporation to achieve "zero discharge" treatment of desulphurization wastewater, the temperature change in the process of flue gas evaporation desulfurization wastewater was studied in the real flue gas environment by setting up a pilot test device. The results showed that compared with low temperature flue gas, the flue gas evaporation desulfurization wastewater at medium temperature can flexibly control the flue gas temperature at the outlet of the drying tower, and the temperature change in the drying process is more gentle, and the drying process is more rapid and reliable. The drying product of desulphurization wastewater is mainly MgSO_4 H _ 2O _ 4 / CaSO _ 4 _ 0.5H _ 2O _ 4 NaCl.The particles are hollow spheres with rough, porous or incomplete surface, and the average particle size is much larger than the average diameter of fly ash. The specific resistance decreases first and then increases slightly with the increase of temperature, but it has little difference with the original fly ash after 120 鈩，

本文編號(hào)：1869710