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.

焙烧法是粉煤灰含重金属和氯化物的净化技术之一。由于有毒阳离子（Hg、Cd、Pb、Cr、Ni和Co）的存在，这些元素与Cl自由基的重组引起了高排放水平。近年来，由于环境污染和腐蚀问题，HCl的排放一直是人们关注的话题。研究内容大多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Cl_2的行为关注相对较少。主要目的是研究氯和氯化合物的行为。此外，建立了该反应体系的详细动力学模型，并根据流动反应器的实验结果进行了验证。Cl自由基最初是由HCl和O_2的碰撞反应产生的，它启动了整个反应过程。在相对有限的O_2浓度范围内，Cl2浓度随O_2浓度的增加而增加。HC1+O_2→Cl+HO_2反应是引发该体系链式反应的Cl自由基的主要来源。高温下生成的Cl自由基在冷却过程中最终形成HCl和Cl_2。增加HCl和不增加h2o的两个实验结果表明，Cl_2的生成比HCl的生成更容易进行。在空调式降管炉（DTF）上进行了不同氯含量下重金属的汽化和分离实验。实验样品由SiO_2、Al_2O_3、PbCl_2、ZnO、CuO、CaCl_2和Fe_2O_3组成，氯浓度由CaCl_2的比例控制。结果表明，Cl含量越高，Pb越容易汽化，此时Pb化合物的适宜回收温度为973K以下。

项目成果

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 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

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