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1. 发明授权

US5171552A Dry processes for treating combustion exhaust gas 失效
标题翻译：用于处理燃烧排放气体的干燥方法
公开(公告)号：US5171552A
公开(公告)日：1992-12-15
申请号：US552382
申请日：1990-07-13
申请人： Yoshimasa Miura , Etsuo Ogino , Michio Ito , Toshio Hama , Shigenori Onitsuka , Michio Ishida , Teruyuki Doi , Teruhiko Kawanabe
发明人： Yoshimasa Miura , Etsuo Ogino , Michio Ito , Toshio Hama , Shigenori Onitsuka , Michio Ishida , Teruyuki Doi , Teruhiko Kawanabe
IPC分类号： B01D53/50
CPC分类号： B01D53/508 , F23J2215/10 , F23J2215/20
摘要： The invention provides a furnace desulfurization process which includes supplying a desulfurizing agent into a furnace or flue to cause the agent to absorb SO.sub.2 from the exhaust gas, the desulfurizing agent being a salt obtained by at least partly neutralizing a Ca desulfurizing agent with an acid; a furnace desulfurization process which includes supplying a Ca desulfurizing agent into a furnace or flue to effect a first-stage desulfurization reaction, collecting ash containing a waste of the agent having an unreacted substance enclosed therein from the exhaust gas, adding an acid to the collected ash to at least partly neutralize the unreacted portion of the agent, and recycling the ash containing the resulting salt into the furnace or flue to effect a second-stage desulfurization reaction; a dry simultaneous desulfurization-denitration process which includes supplying a Ca desulfurizing agent into a furnace or flue to effect a desulfurization reaction, collecting ash containing a waste of the agent having an unreacted substance enclosed therein from the exhaust gas, adding a denitrating reducing agent to the collected ash, and recycling the ash containing the waste desulfurizing agent and the reducing agent into the furnace or flue to effect desulfurization and denitration reactions; and a dry simultaneous desulfurization-denitration process which includes supplying a Ca desulfurizing agent into a furnace or flue to effect a desulfurization reaction, collecting ash containing a waste of the agent having an unreacted substance enclosed therein from the exhaust gas, adding an acid to the collected ash to at least partly neutralize the unreacted substance, adding a denitrating reducing agent to the ash containing the resulting salt, and recycling the ash containing the salt and the reducing agent into the furnace or flue to effect desulfurization and denitration reactions.
摘要翻译：本发明提供了一种炉式脱硫方法，其包括将脱硫剂供应到炉或烟道中，使得试剂从废气中吸收SO 2，该脱硫剂是通过用酸至少部分中和Ca脱硫剂得到的盐; 包括将Ca脱硫剂供应到炉或烟道中进行第一阶段脱硫反应的炉式脱硫方法，从废气中收集含有其中包含未反应物质的废物的灰分，向收集的烟道中加入酸灰至少部分中和试剂的未反应部分，并将含有所得盐的灰分再循环到炉或烟道中以进行第二阶段脱硫反应; 一种干式同时脱硫脱硝方法，其包括将Ca脱硫剂供应到炉或烟道中进行脱硫反应，从废气中收集含有其中包含未反应物质的废物的灰分，将脱硝还原剂加入到收集的灰分，并将含有废脱硫剂和还原剂的灰分回收到炉或烟道中以进行脱硫和脱硝反应; 以及干法同时脱硫脱硝工艺，其包括将Ca脱硫剂供应到炉或烟道中进行脱硫反应，从废气中收集含有其中包含未反应物质的废物的灰分，向所述废气中加入酸收集的灰分至少部分中和未反应物质，向含有所得盐的灰分中加入脱硝还原剂，并将含有盐和还原剂的灰分再循环到炉或烟道中以进行脱硫和脱硝反应。

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