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硫磺回收装置尾气主要来源于净化尾气和液硫池尾气,因此,控制净化尾气中的H_2S含量和液硫池气中的硫含量,将有效降低硫磺装置烟气二氧化硫排放浓度。可以采用更换高效的脱硫溶剂提高尾气吸收效果,选用合适的碱洗工艺净化脱硫尾气,调整液硫池气与液硫脱硫尾气处理流程,减少液硫尾气排放。 相似文献
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《化学反应工程与工艺》2018,(6)
为解决电厂含硫烟气的深度脱硫及资源化利用问题,采用中空纤维膜溶剂吸收法烟气脱硫技术对6.00×10~6Nm~3/h烟气进行深度脱硫处理。将脱除的二氧化硫采用二氧化硫烧碱法制备了亚硫酸钠,采用一氧化碳催化还原二氧化硫制备硫磺,采用熔融法制备了不溶性硫磺。尾气处理工艺采用化学吸收法,以氨水为吸收剂对尾气中的二氧化碳、二氧化硫进行吸收处理。通过工艺的模拟与优化,可得到不溶性硫磺摩尔分数99.2%,硫磺摩尔分数99.9%。 相似文献
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评述了动力波洗涤技术的应用现状.对其在复合肥生产系统的尾气净化工艺、冶金烟气制酸系统的尾气净化工艺和中化云龙集团中处理90 t/h的锅炉尾气中二氧化硫气体的净化工艺等典型代表技术的发展进行分析.结合动力波洗涤器的脱硫原理和设备特性提出未来动力波洗涤器技术的发展方向.理论分析和已有研究表明,运用动力波洗涤器技术脱除工业锅炉尾气,其烟气处理量范围广,稳定性高,脱硫效率高;且可有效解决磷矿浆堵塞等问题. 相似文献
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Walter Kaminsky 《化学,工程师,技术》1983,55(9):667-679
Processes for flue gas desulphurization . The continuous high emission of sulphur dioxide from the combustion of fossil fuels is causing increasing damage not only to nature but also to buildings and machinery, especially in industrialized countries. It is possible by desulphurization of the flue gases to reduce the emission of sulphur dioxide by as much as 90%. This can be achieved industrially by dry absorption using activated charcoal or addition of limestone, and by wet processes employing soda, limestone, calcium hydroxide or ammonia as absorbents. The characteristic features of each of the different processes are described. The main residues obtained from these desulphurization processes are gypsum, sulphur, or fertilizer salts, most of which can be recycled. The running costs for such flue gas cleaning processes amount to between DM 0.007 and DM 0.018/kWh depending on location and requirements. 相似文献
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在研究比较各类脱硫工艺的基础上,针对抚顺石化公司洗化厂锅炉燃煤含硫低的实际情况,为实现二氧化硫和粉尘排放的全面达标为目标,以轻烧镁作为吸收剂吸收SO2为技术核心,提出除尘脱硫-体化改造方案,在原有水膜除尘器基础上增设SO2吸收塔,实现脱硫除尘. 相似文献
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介绍了组合式除雾脱硫塔在烟气脱硫项目中的应用情况.重点介绍了组合式除雾脱硫塔的设备结构和运行优势.该脱硫塔将一段电除雾器通过法兰连接在脱硫塔的上部,通过电除雾器对烟气中的烟尘、酸雾、及砷、铅等有害杂质进行深度净化,以达到满足环保排放指标的目的.该脱硫塔可节约设备占地面积,节省投资成本. 相似文献
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湿式氨法脱硫工艺及应用 总被引:5,自引:0,他引:5
随着二氧化硫对环境的污染越来越严重,国家环保总局对烟气二氧化硫排放控制严格,烟气脱硫显得日益重要。简单介绍了湿式氨法烟气脱硫技术的工艺流程及实际应用情况。湿式氨法脱硫工艺具有原料易得、脱硫塔不易结垢、不产生废水、副产品硫酸铵可作为农用肥料,减少了对环境的二次污染等特点,是较适合我国国情的烟气脱硫技术。 相似文献
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The gas–solids flow in an industrial-scale semi-dry method desulphurization tower is simulated by the computational particle fluid dynamics (CPFD) approach. Compared with previous studies on desulphurization towers, this study focuses on analyzing particle distribution characteristics such as particle volume fraction, temperature distribution, and residence time. The simulation fully considered the particle–fluid, particle–particle, and particle–wall interactions in the desulphurization tower. Based on these considerations, the effects of flue gas inlet velocity and temperature on the gas–solid distribution characteristics of the desulphurization tower are simulated. An optimization scheme for adjusting the gas–solid flow in the desulphurization tower is proposed. The research results show that the error between the CPFD simulation data and experimental data is small and the changing trend is consistent. The particles in the bed of the desulphurization tower show a typical core–annulus flow. The distribution of gas and particles in the bed has a serious deviation with the increase of the flue gas inlet velocity and temperature. As the axial height of the desulphurization tower increases, the flue gas velocity, temperature, particle concentration, and water vapour distribution in the bed become more uniform. The relatively stable operating conditions for the gas–solid flow in the desulphurization tower is that the flue gas inlet velocity and temperature are 15 m/s and 393 K, respectively. Under these operating conditions, the pressure loss caused by the venturi accounted for 73.6% of the total pressure loss of the desulphurization tower. When the particle radius is between 0–150 μm, the particle size and the flue gas inlet velocity have the greatest influence on the particle residence time. Finally, the distribution of gas and particles before and after the adjustment of the desulphurization tower is compared, which showed that adjusting the bottom structure of the desulphurization tower could optimize the gas–solid flow. 相似文献
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针对利用烟道气处理脱硫废水的方法,通过废水系统投运前、后石灰石-石膏湿法烟气脱硫装置除尘效率,以及吸收塔浆液、废水箱废水、除尘器灰斗中灰样的Cl-、总汞、总铬、总砷浓度的对比,分析了烟道气处理脱硫废水过程对除尘效率的影响;确定了废水处理过程中Cl-和重金属的迁徙路径。试验结果表明,烟道气处理脱硫废水工艺可提高除尘效率;脱硫废水中大部分Cl-、Cr、As迁移到了灰斗的烟尘中。该脱硫废水处理系统所需要的设备少,工艺简单,占地面积小,处理效果好,解决了脱硫系统废水难以处理的问题。 相似文献
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以处理某锰企电解锰渣煅烧装置产生的高浓度SO2烟气的脱硫反应塔为例,将该反应塔与石灰石-石膏湿法脱硫塔进行对比及分析,并对反应塔的选型、塔主体结构和防腐处理进行介绍.氧化锰矿浆脱硫制硫酸锰技术的核心设备是反应塔.反应塔内脱硫浆液与含硫烟气逆流接触反应,脱硫后的烟气达标排放,反应生成硫酸锰浆液返回电解锰车间回收处理.反应塔设计进口烟气量为135300 m3/h,烟气中φ(SO2)最高可达9.07%.运行结果表明,该反应塔运行稳定,浆液混合均匀,系统无堵塞和可见腐蚀,出口气体ρ(SO2)≤200 mg/m3,锰浸出率最高可达90%. 相似文献
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介绍了燃煤锅炉电站烟气脱硫工艺流程及旁路烟道的作用。分析了取消旁路烟道后对现有及新建脱硫装置的设计及运行的影响。提出了取消烟道旁路的主要优势及对原有脱硫装置稳定运行的技术难点。为使取消烟道旁路后的装置安全稳定运行,必须设计合理,严格控制吸收塔入口烟气温度并减少油污及粉尘。 相似文献
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随着我国经济快速发展,煤炭、石油等化石燃料消耗持续增长,雾霾天气频繁出现,酸雨区域面积不断扩大。针对二氧化硫排放对环境生态的压力徒增的现状,本文简要介绍了干法、半干法和湿法烟气脱硫技术工艺及其优缺点,讨论了石灰石-石膏法、钠碱法、氨法、镁法、有机胺法、海水法、磷矿浆法等湿法烟气脱硫技术的优缺点,重点阐述了新型磷矿浆脱硫法及其脱硫机理,比较了不同湿法脱硫技术的特点和应用范围,进行了磷矿浆与钠法、石灰石-石膏法与镁法湿法烟气脱硫技术经济性分析。分析表明,磷矿浆湿法烟气脱硫运行成本最低,其回收的二氧化硫催化氧化为硫酸后进入磷化工产业链,替代了部分硫酸原料,无副产物,没有二次污染,适用于具有磷矿生产的企业和园区。该技术原理可以推广到湿法冶金企业。 相似文献