STUDY OF CATALYTIC REDUCTION OF NOx IN FLUE GAS FROM A MUNICIPAL REFUSE INCINERATOR

催化还原市政垃圾焚烧厂烟气中NOx的研究

• 批准号: 63550171
• 负责人: MORIMUNE Takaaki
• 金额: $ 1.34万
• 依托单位: TOKYO METROPOLITAN UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63550171/
• 关键词: Combustion; NOx Removal Process; Pellet Catalyst Reactor; Removal Efficiency; Retention Time; Municipal Refuse Incinerator; Catalyst Poisoning; Catalyst Regeneration; Heat Treatment; 脱硝率; 酸性硫安; 比表面積; 触媒劣化; 排ガス; 浄化; 窒素酸化物; 触媒脱硝法; 反応温度; アン

Recently the technique of the catalytic reduction of NOx has been experimentally used to clean dirty gas containing catalytic poisons and dust such as flue gas from a municipal refuse incinerator. However many problems such as deterioration of catalytic performance and regeneration technique for the catalyst remain unsolved for practical application.Firstly, we investigated the catalytic reduction process of nitrogen oxide with ammonia using a mixed gas of air, CO2 and NO at the reaction temperature of 240ﾟC. The catalyst used was V2O5-TiO2 pellets,and average diameter of pellets was 5 mm. The volumetric concentrations of inlet gas were O2 19%, CO2 7-9%, NO 100-140ppm and the remainder N2 gas. The effects of aspect ratio of the catalyst packed bed, retention time, reaction temperature and linear velocity through the reactor on the NOx removal efficiency were studied experimentally, and the change of reaction rate constant and the amount of leaked NH3 were also investigated.Secondary, in order to perform regeneration most energy conservatively, the heat treatment of 400 to 600ﾟC for 2 to 6 hours was studied using a electric furnace and the recovery of several percent of NOx removal efficiency was obtained. The regeneration techniques for catalysts are discussed on the basis of the results of the change of micropore volume, surface area and accumulation of Na, K, Ca, Fe in the catalyst.

近年来，NOx催化还原技术已被试验用于净化含催化毒物和粉尘的脏气，如生活垃圾焚烧炉的烟道气。首先，在反应温度240ﾟC下，考察了空气、二氧化碳和NO混合气体催化还原氮氧化物的过程。催化剂为V2O5-TiO2微球，平均直径为5 mm。进气体积浓度O2为19%，CO2为7~9%，NO为100~140ppm，其余为氮气。实验研究了催化剂填充床的长径比、停留时间、反应温度和反应床线速度对NOx脱除效率的影响，考察了反应速率常数和NH3泄漏量的变化。其次，为了最大限度地节约再生能量，在电炉中进行了400~600ﾟC热处理2~6h的实验，获得了几个百分点的脱氮率。根据催化剂微孔体积、比表面积的变化以及催化剂中Na、K、Ca、Fe的积累量的变化，讨论了催化剂的再生技术。

项目成果

森棟隆昭,平山直道: "都市ごみ焼却炉排ガスの接触還元脱硝法に関する研究(第2報、触媒反応槽の基本特性)" 日本機械学会論文集B編. 55巻B編. 232-238 (1989)

森宗隆明、平山直道：《城市垃圾焚烧炉废气的催化还原脱硝方法的研究（第2次报告，催化反应槽的基本特性）》日本机械学会会刊B卷第55卷B.232 -238（1989）

森棟隆昭,保田郁夫: "都市ごみ焼却炉排ガスの接触還元脱硝法に関する研究(触媒の被毒と再生)" 日本機械学会講演概要集. No.897ー2. 89-90 (1989)

Takaaki Morimune、Ikuo Yasuda：“城市垃圾焚烧炉废气的催化还原脱硝方法的研究（催化剂的中毒和再生）”日本机械工程师学会讲座摘要第897-90号（1989年）。

森棟隆昭,保田郁夫: "都市ごみ焼却炉排ガスの接触還元脱硝法に関する研究(被毒触媒の再生方法の検討)" 日本機械学会講演論文集(第67期総会講演会). Vol.B. (1990)

森宗隆明、安田郁夫：“城市垃圾焚烧炉废气的催化还原脱硝方法的研究（中毒催化剂的再生方法的研究）”日本机械工程学会会议论文集（第67届会员大会）（1990年）。

森棟隆昭,平山直道: "都市ごみ焼却炉排ガスの接触還元脱硝法に関する研究(第2報、触媒反応槽の基本特性)" 日本機械学会論文集B編. 55. 232-238 (1989)

Takaaki Morimune、Naomichi Hirayyama：“城市垃圾焚烧炉废气的催化还原脱硝方法的研究（第2次报告，催化反应槽的基本特性）”日本机械工程学会会刊，B版55。232-238（1989年）。 ）

T.MORIMUNE & N.HIRAYAMA: "Study of Catalytic Reduction of NOx in FLUE Gas From a Municipal Refuse Incinerator (2nd Report, Fundamental Characteristics of Catalyst Reactor)" Transaction of Japan Society of Mechanical Engineers, Part B 55-509, pp.232-238, 1

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