本文關(guān)鍵詞： 煙氣脫硝 分區(qū)噴氨 NOx分布 氨逃逸 脫硝率　出處：《石油煉制與化工》2017年05期 　論文類(lèi)型：期刊論文

【摘要】：針對(duì)選擇性催化還原(SCR)脫硝反應(yīng)器同截面溫度分布不均,導(dǎo)致NO_x濃度分布不均,嚴(yán)重影響脫硝效果,采用傳統(tǒng)的均勻噴氨方式無(wú)法有效解決脫硝率低、局部氨逃逸的問(wèn)題,以煉油廠自備鍋爐SCR脫硝裝置為研究對(duì)象,在SCR脫硝反應(yīng)器入口煙氣NO_x濃度分布不均的情況下,采用分區(qū)噴氨的控氨方式,提高脫硝率的同時(shí)改善反應(yīng)器出口截面NO_x濃度分布的均勻性,有效控制了氨逃逸。分區(qū)噴氨與均勻噴氨實(shí)驗(yàn)數(shù)據(jù)相比,分區(qū)噴氨后脫硝率提高11.5百分點(diǎn),氨耗量減少5kg/h,氨逃逸濃度降低77.5%。根據(jù)溫度和濃度的關(guān)系估算,均勻噴氨時(shí)反應(yīng)器入口同截面溫度最高處和最低處溫差應(yīng)不超過(guò)30℃,否則需考慮分區(qū)噴氨方式。
[Abstract]:Selective catalytic reduction (SCR) denitrification reactor with the section temperature distribution is uneven, resulting in uneven distribution of NO_x concentration, seriously affected the denitrification effect, using uniform injection ammonia traditional methods can not effectively solve the denitrification rate is low, local ammonia escape problems in refinery owned boiler denitration device on SCR the object in the SCR denitrification reactor entrance flue gas NO_x concentration under the condition of uneven distribution, the control way of ammonia ammonia partition, improve denitrification rate and improve reactor outlet NO_x concentration distribution, the effective control of ammonia escape. The partition of ammonia injection compared with uniform injection ammonia experimental data partition after ammonia denitrification rate increased by 11.5 percentage points, ammonia consumption is reduced 5kg/h, 77.5%. decreased the concentration of ammonia escape according to the relationship between temperature and concentration estimation, uniform injection ammonia reactor at the highest temperature at the same section entrance and the lowest temperature should not exceed 30 degrees, or not It is necessary to consider the zoning method of ammonia injection.

【作者單位】： 中國(guó)石化撫順石油化工研究院;
【分類(lèi)號(hào)】：X742
【正文快照】： 氮氧化物是大氣主要污染物之一,降低煉油廠鍋爐尾氣NOx排放越來(lái)越受到關(guān)注[1-4]。選擇性催化還原(SCR)技術(shù)是當(dāng)前研究廣泛、技術(shù)成熟的NOx末端處理工藝[5]。SCR煙氣脫硝的原理是在催化劑作用下,在煙氣中噴入還原劑NH3,將煙氣中的NOx還原成N2和H2O[6]。煙氣NOx與還原劑NH3適宜

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1 謝海峰;;煙氣脫硝助劑在催化裂化裝置上的應(yīng)用[J];石油煉制與化工;2014年06期

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本文編號(hào)：1450771