臭氧多脱副产物亚硝酸钙的复盐沉淀试验研究

doi:10.3969/j.issn.0438-1157.2014.12.043

化工学报 ›› 2014, Vol. 65 ›› Issue (12): 4965-4970.DOI: 10.3969/j.issn.0438-1157.2014.12.043

臭氧多脱副产物亚硝酸钙的复盐沉淀试验研究

刘颖祖, 朱燕群, 马强, 徐超群, 王智化, 周俊虎, 岑可法

浙江大学能源清洁利用国家重点实验室, 浙江杭州 310027

收稿日期:2014-06-09 修回日期:2014-07-31 出版日期:2014-12-05 发布日期:2014-12-05
通讯作者: 朱燕群
基金资助:
国家重点基础研究发展计划项目(2012CB214906);浙江省重点科技创新团队项目(2011R50017).

Double-salt precipitation of Ca(NO₂)₂ derived from multi-pollution control process by ozone

LIU Yingzu, ZHU Yanqun, MA Qiang, XU Chaoqun, WANG Zhihua, ZHOU Junhu, CEN Kefa

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2014-06-09 Revised:2014-07-31 Online:2014-12-05 Published:2014-12-05
Supported by:
supported by the National Basic Research Program of China (2012CB214906) and Zhejiang Key Science and Technology Innovation Team (2011R50017).

摘要/Abstract

摘要： 针对复盐沉淀法(氢氧化钙与亚硝酸钙反应生成复盐沉淀)处理烟气中臭氧氧化氮氧化物的液相吸收产物亚硝酸钙,采用控制变量法对此反应的诸多影响因素(反应温度、反应物浓度、反应过程扰动和反应物形态等)进行了试验研究.结果表明:为提高复盐沉淀效率,需要选择合适的反应温度(80℃最佳),同时反应物投药量的增加以及反应过程湍流度的增大都能够有效提高复盐共沉淀效率.复盐沉淀会伴随着氢氧化钙的析出而动态产生,构建氢氧化钙的析出条件能提高亚硝酸钙捕集效率.

关键词: 复盐反应, 沉淀, 污染, 亚硝酸钙, 氢氧化钙

Abstract: Based on the double-salt precipitation method, an experimental study on the precipitation of calcium nitrite derived from wastewater treatment by oxidation of NO_x and SO₂ with ozone was performed. The effects of reaction temperature, reactant concentration, turbulence intensity on calcium nitrite precipitation efficiency were investigated by the variable-controlled method. Reaction temperature strongly influenced precipitation efficiency and optimal temperature was 80℃. Both increasing reactant concentration and turbulence intensity in the reaction process could enhance precipitation efficiency. Because double-salt precipitation was accompanied by separation of calcium hydroxide, precipitation efficiency could be improved by altering the separation conditions of calcium hydroxide.

Key words: double-salt reaction, precipitation, pollution, Ca(NO₂)₂, Ca(OH)₂

中图分类号:

TQ115

刘颖祖, 朱燕群, 马强, 徐超群, 王智化, 周俊虎, 岑可法. 臭氧多脱副产物亚硝酸钙的复盐沉淀试验研究[J]. 化工学报, 2014, 65(12): 4965-4970.

LIU Yingzu, ZHU Yanqun, MA Qiang, XU Chaoqun, WANG Zhihua, ZHOU Junhu, CEN Kefa. Double-salt precipitation of Ca(NO₂)₂ derived from multi-pollution control process by ozone[J]. CIESC Journal, 2014, 65(12): 4965-4970.

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臭氧多脱副产物亚硝酸钙的复盐沉淀试验研究

Double-salt precipitation of Ca(NO₂)₂ derived from multi-pollution control process by ozone

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臭氧多脱副产物亚硝酸钙的复盐沉淀试验研究

Double-salt precipitation of Ca(NO2)2 derived from multi-pollution control process by ozone

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Double-salt precipitation of Ca(NO₂)₂ derived from multi-pollution control process by ozone