Analysis of chlorine behavior in the high temperature waste treatment process and the reduction of the chloride compounds

高温废物处理过程中氯的行为分析及氯化物的减少

• 批准号: 17310054
• 负责人: NINOMIYA Yoshihiko
• 金额: $ 9.9万
• 依托单位: Chubu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17310054/
• 关键词: Chloride compound; Cl radical; Cl_2; HCl; Fly ash; Particulate matter; waste treatment; elementary reaction

As one of the cleanup technologies of fly ash including some heavy metals and chloride compounds, a roasting method is being developed. With the presence of toxic cations (Hg, Cd, Pb, Cr, Ni, and Co), high emissions level of these elements is induced by the recombination with Cl radical. Due to the environment pollution and corrosive problem, the emission of HCl has been a subject of concern in recent years. Most of research contents focus on controlling the emissions of HCl by improving combustion conditions and adding additives, however, a relative little attention is paid on the behavior of Cl_2. The main purpose is to investigate the behaviors of chlorine and chloride compounds. In addition, a detailed kinetic model of this reaction system is developed and validated against experimental results obtained from a flow reactor.Cl radicals are originally produced from the collision reaction of HCl and O_2, which initiates the overall reaction process. Within a relative limited range of O_2 concentration, Cl2 concentration is increasing with O_2 concentration.The reaction HC1+O_2→Cl+HO_2 is the main source of Cl radicals which initiate the chain reaction of this system. The Cl radicals generated at high temperature finally form HCl and Cl_2 during the cooling process. The two experimental results, increasing HCl and without H_2O, indicate that the formation of Cl_2 is more likely to proceed than the formation of HCl.The experiments on heavy metals vaporization and partition with different chlorine content were performed in a drop tube furnace (DTF) with air condition. The chlorine concentration was controlled by the proportion of CaCl_2 in the experimental samples which were composed by SiO_2, Al_2O_3, PbCl_2, ZnO, CuO, CaCl_2 and Fe_2O_3. According to this result, more fraction of Cl makes Pb to vaporize easily and the suitable recovery temperature for Pb compounds is below 973K in this case.

作为含重金属和氯化物的飞灰净化技术之一，一种焙烧方法正在开发中。在有毒阳离子(汞、镉、铅、铬、镍和钴)存在的情况下，这些元素的高水平发射是由于与氯自由基的复合而引起的。近年来，由于环境污染和腐蚀性问题，HCl的排放一直是人们关注的问题。大多数研究内容集中在通过改善燃烧条件和添加添加剂来控制HCl的排放，而对Cl2行为的关注相对较少，主要目的是研究氯和氯化物的行为。此外，建立了该反应体系的详细动力学模型，并与流动反应的实验结果进行了验证。氯自由基最初是由HCl和O2的碰撞反应产生的，它启动了整个反应过程。在相对有限的O2浓度范围内，Cl2浓度随O2浓度的增加而增加，反应Hc1+O2、→、Cl2+HO2是引发该体系连锁反应的主要氯自由基来源。高温下产生的氯自由基最终在降温过程中生成HCl和Cl2。增加HCl和不增加H2O的两种实验结果表明，Cl2的生成比HCl的生成更容易进行。在有空调的管式炉中进行了不同氯含量的重金属蒸发和分配实验。由SiO_2、Al_2O_3、PbCl_2、ZnO、CuO、CaCl2和Fe_2O_3组成的实验样品中，氯的浓度由CaCl2的比例控制。根据这一结果，较多的氯使铅更容易蒸发，在这种情况下，铅化合物的适宜回收温度为973K以下。

项目成果

Interactions among inherent minerals during coal combustion and their impacts on the emission of PM_<10>. 2. Emission of submicrometer-sized particles

煤炭燃烧过程中固有矿物质之间的相互作用及其对PM_<10>排放的影响。

• 发表时间: 2007
• 期刊: Energy & Fuels 21.2
• 作者: Qunying Wang;Zhongbing Dong;Ounying Wang;Qunying Wang;L. Zhang;Lian Zhang;Lian Zhang;Qunying Wang;Lian Zhang;L. Zhang;Lian Zhang;Qunying Wang;Lian Zhang;Qunying Wang;Lian Zhang
• 通讯作者: Lian Zhang

混炭燃焼によるPM2.5の低減に関する研究

混煤燃烧减排PM2.5研究

• 发表时间: 2007
• 作者: 二宮善彦;王 群英;張 立安;黒田悠揮;長江正登;佐藤 厚;二宮 善彦;程 翼;王 群英;王 群英
• 通讯作者: 王 群英

Occurrence of inorganic elements in condensed volatile matter emitted from coal pyrolysis and their contributions to the formation of ultrafine particulates during coal combustion

• DOI: 10.1021/ef050429h
• 发表时间: 2006-05
• 期刊: Energy & Fuels
• 影响因子: 5.3
• 作者: Lian Zhang;Y. Ninomiya;T. Yamashita

Interactions among Inherent Minerals during Coal Combustion and Their Impacts on the Emission of PM_<10>. 2. Emission of Submicron-Sized Particles

煤炭燃烧过程中固有矿物质之间的相互作用及其对PM_<10>排放的影响。

• 发表时间: 2007
• 期刊: (with peer review) (with peer review)
• 作者: Qunying Wang;Zhongbing Dong;Ounying Wang;Qunying Wang;L. Zhang;Lian Zhang;Lian Zhang;Qunying Wang;Lian Zhang;L. Zhang;Lian Zhang;Qunying Wang;Lian Zhang
• 通讯作者: Lian Zhang

酸素富化型汚泥溶融プラントにおける脱水汚泥の燃焼挙動モデル

富氧污泥熔融装置脱水污泥燃烧行为模型

• 发表时间: 2006
• 期刊: 日本エネルギー学会誌 85.9
• 作者: Yu;M.Xu;L.Zhang;H.Yao;Q.Wang;Y.Ninomiya;Lian Zhang;Lian Zhang;二宮 善彦
• 通讯作者: 二宮 善彦