【廣告】
脫硝技術(shù)具體可以分為:
燃燒前脫硝:
(1)加氫脫硝、
(2)洗選
燃燒中脫硝:
(1)低溫燃燒、
(2) 低氧燃燒、
(3)FBC燃燒技術(shù)、
(4)采用低NOx燃燒器、
(5)煤粉濃淡分離、
(6)煙氣再循環(huán)技術(shù)
燃燒后脫硝:
(1)選擇性非催化還原脫硝(SNCR)、
(2) 選擇性催化還原脫硝(SCR)、
(3)活性炭吸附、
(4)電子束脫硝技術(shù)
選擇性非催化還原(SNCR)脫硝技術(shù)
SNCR 方法主要是將含氮的還原劑(尿素、氨水或液氨)噴入到溫度為850~1100℃ 的煙氣中,使其發(fā)生還原反應(yīng),脫除NOx,生成氮?dú)夂退?。對水性涂料中每公升VOC含量控制在50克以下,溶劑性涂料每公升VOC含量控制在75克以內(nèi)。由于在一定溫度范圍及有氧氣的情況下,含氮還原劑對NOx的還原具有選擇性,同時(shí)在反應(yīng)中不需要催化劑,因此稱之為選擇性非催化還原。SNCR系統(tǒng)的主要設(shè)備均采用模塊化設(shè)計(jì),主要有還原劑儲存與輸送模塊、稀釋水模塊、混合計(jì)量模塊、噴射模塊組成。
SNCR脫硝噴槍雙流體噴槍的一般應(yīng)用:
噴槍采用快速接頭連接方式,拆卸方便;
采用保護(hù)碳化硅,具有耐高溫,耐磨損等特點(diǎn),無需另設(shè)冷卻裝置就可確保噴槍長期安全運(yùn)行;
噴槍體積小,套管外徑只有36mm,鍋爐脫硝噴槍,可直接安裝于爐壁上。
噴槍采用保護(hù)套管及活動(dòng)法蘭連接。可手動(dòng)將伸進(jìn)或者退出爐內(nèi);
采用金屬保護(hù)套管設(shè)有風(fēng)冷接口,確保高溫環(huán)境下長期使用;
一般應(yīng)用:
燃煤鍋爐半干法噴霧脫硫;
高爐瀘頂噴霧降溫;
高爐煤氣降溫冷卻;
水泥干法線轉(zhuǎn)窯尾增濕塔煙氣增濕降溫冷卻;
垃圾焚燒冷卻塔高溫?zé)煔鈬婌F降溫冷卻;
有色金屬冶煉高溫?zé)煔獾膰婌F降溫冷卻;
高爐重力除塵器內(nèi)煙氣的干法噴霧降溫;
電路煉鋼廠煙氣的蒸汽冷卻;
玻璃、燒結(jié)、化工行業(yè)高溫?zé)煔鈬婌F降溫。
SNCR denitration gun general application of the dual fluid spray gun:
Spray gun using quick joint connection, disassemble;
Adopt protection of silicon carbide, with high temperature resistance, wear resistance and other characteristics, without setting up cooling device can ensure the long-term safe operation of the spray gun;
only 36 mm gun is small in size, casing diameter, can be directly installed on the furnace wall.
Spray gun used to protect casing flange connection and activities.Manual will be reached or come back;
Use a metal protective casing is equipped with air cooling interface,噴槍, to ensure the long-term use under high temperature environment;
General application:
Coal fired boiler semi dry spray desulfurization;
The blast furnace filter spray cooling;
Blast furnace gas temperature and cooling;
Cement dry normal turn preheater humidifying tower flue gas humidification and cooling of cooling;
Garbage incineration flue gas spray cooling tower high temperature cooling cooling;
Smelting non-ferrous metal spray cooling high temperature flue gas cooling;
Blast furnace flue gas dry spray cooling in gravity dust collector;
The circuit steel plant flue gas steam cooling;
Glass, sintering, chemical industry, high temperature flue gas spray cooling.