富氧燃烧模拟烟气石灰石-石膏湿法脱硫试验研究

doi:10.11930/j.issn.1004-9649.2016.11.159.06

中国电力 ›› 2016, Vol. 49 ›› Issue (11): 159-164.DOI: 10.11930/j.issn.1004-9649.2016.11.159.06

富氧燃烧模拟烟气石灰石-石膏湿法脱硫试验研究

刘毅¹, 仲兆平², 赵凯², 史晓宏¹, 陈创社¹, 王文宝³

1. 神华国华（北京）电力研究院有限公司,北京 100025;
2. 东南大学能源与环境学院,能源热转换及其过程测控教育部重点实验室,江苏南京 210096;
3. 南京源恒环境研究所有限公司,江苏南京 210023

收稿日期:2016-09-16 出版日期:2016-11-10 发布日期:2016-12-09
作者简介:刘毅（1970—）,男,内蒙古包头人,硕士,高级工程师,从事清洁发电和环保技术研究。E-mail: 16850032@shenhua.cc

Experimental Study on Limestone-Gypsum Wet Desulphurization with Simulated Flue Gas under Oxygen-Enriched Combustion

LIU Yi¹, ZHONG Zhaoping², ZHAO Kai², SHI Xiaohong¹, CHEN Chuangshe¹, WANG Wenbao³

1. Shenhua and Guohua Power Research Institute Company, Beijing 100025, China;
2. Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
3. Nanjing Yuanheng Institute for Environmental Studies Co., Ltd., Nanjing 210023, China

Received:2016-09-16 Online:2016-11-10 Published:2016-12-09

摘要/Abstract

摘要： 为了研究富氧燃烧情况下烟气石灰石-石膏湿法脱硫系统的效率,在自行搭建的富氧燃烧烟气石灰石-石膏湿法脱硫实验台上进行脱硫试验,通过控制脱硫系统中的CO₂浓度（体积分数14%、60%、70%、80%和90%）,研究富氧燃烧气氛下不同烟气流速、液气比、入口SO₂浓度以及浆液pH值对SO₂脱除特性的影响。发现随着烟气流速和入口SO₂浓度的增加,液气比和浆液pH值的减小,脱硫效率逐渐减小,系统中CO₂浓度越大,脱硫效率越小;对不同CO₂浓度气氛和浆液pH下的石膏晶体进行粒度分析和SEM电镜扫描,发现浆液pH值和CO₂对石膏的结晶并不会产生明显的影响。

关键词: 火力发电, 锅炉, 富氧燃烧, 高CO2气氛, 烟气脱硫, 脱硫效率, 石膏晶体

Abstract: To study the efficiency of limestone-gypsum wet flue gas desulfurization under oxygen-enriched combustion, the desulfurization test is conducted on the self-established experiment rig. Through controlling the CO₂ concentration(the volume fractions as 14%, 60%, 70%, 80% and 90%) in the desulfurization system, the impacts of different flue gas velocity, liquid gas ratio, inlet SO₂ concentration, and slurry pH value on the SO₂ absorption characteristics under the oxygen-enriched combustion atmosphere are studied. It is discovered that with the increase of flue gas velocity and inlet SO₂ concentration, and the decrease of gas liquid ratio and slurry pH value, the desulfurization efficiency drops; the higher CO₂ concentration in the system, the lower desulfurization efficiency is observed. Meanwhile, under different CO₂ concentration atmosphere and slurry pH value, the gypsum crystal grain size is studied by using the laser particle analyzer and the gypsum is scanned by using the SEM electron microscope, from which it shows that the slurry pH value and the CO₂ concentration do not have obvious impacts on the crystallization of gypsum.

Key words: thermal power generation, boiler, oxygen-enriched combustion, high CO2 concentration atmosphere, flue gas desulphurization, desulfurization efficiency, gypsum crystals

中图分类号:

TM621

刘毅, 仲兆平, 赵凯, 史晓宏, 陈创社, 王文宝. 富氧燃烧模拟烟气石灰石-石膏湿法脱硫试验研究[J]. 中国电力, 2016, 49(11): 159-164.

LIU Yi, ZHONG Zhaoping, ZHAO Kai, SHI Xiaohong, CHEN Chuangshe, WANG Wenbao. Experimental Study on Limestone-Gypsum Wet Desulphurization with Simulated Flue Gas under Oxygen-Enriched Combustion[J]. Electric Power, 2016, 49(11): 159-164.

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https://www.electricpower.com.cn/CN/Y2016/V49/I11/159

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富氧燃烧模拟烟气石灰石-石膏湿法脱硫试验研究

Experimental Study on Limestone-Gypsum Wet Desulphurization with Simulated Flue Gas under Oxygen-Enriched Combustion

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富氧燃烧模拟烟气石灰石-石膏湿法脱硫试验研究

Experimental Study on Limestone-Gypsum Wet Desulphurization with Simulated Flue Gas under Oxygen-Enriched Combustion

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