Mercury removal system and mercury removal process
    73.
    发明授权
    Mercury removal system and mercury removal process 有权
    汞去除系统和汞去除过程

    公开(公告)号:US07544338B2

    公开(公告)日:2009-06-09

    申请号:US11609867

    申请日:2006-12-12

    摘要: Provided is a system for removing mercury from a mercury-containing exhaust gas, which contains a mercury chlorinating agent feed unit for feeding a mercury chlorinating agent to an flue exhaust gas containing nitrogen oxide, sulfur oxide and mercury, a reductive denitration unit for reducing the nitrogen oxide, and a desulfurization unit for removing the sulfur oxide, characterized in that the mercury chlorinating agent feed unit further comprises a heating unit for heating a non-gaseous agent for mercury chlorination which is in the non-gaseous form under normal temperature and normal pressure or a gasifying unit for obtaining a gaseous agent for mercury chlorination from the non-gaseous agent for mercury chlorination. The present invention makes it possible to provide a mercury removal process and system which have high reliability and can be operated at a low cost.

    摘要翻译: 本发明提供一种从含汞废气中除去汞的系统,其中含有用于将汞氯化剂供给到含有氮氧化物,硫氧化物和汞的烟道废气的汞氯化剂供给单元,还原脱硝单元 氮氧化物和用于除去硫氧化物的脱硫单元,其特征在于,所述氯化汞进料单元还包括加热单元,用于加热在常温常压下为非气态的用于汞氯化的非气态试剂 压力或气化单元,用于从用于汞氯化的非气态试剂获得用于汞氯化的气态试剂。 本发明使得可以提供具有高可靠性并且可以以低成本运行的除汞工艺和系统。

    Wet gas purification method and system for practicing the same
    74.
    发明授权
    Wet gas purification method and system for practicing the same 有权
    湿气净化方法和系统实践相同

    公开(公告)号:US07381389B2

    公开(公告)日:2008-06-03

    申请号:US10523679

    申请日:2003-08-06

    IPC分类号: B01D53/58 B01J10/00

    摘要: A wet gas purification method is provided for removing ammonia from a heavy oil gasification gas, such as coal. The method principally involves a washing step during which absorbent is charged into the gas to absorb ammonia and an ammonia treating step wherein absorbent discharged from the washing step is separated into an effluent and an off-gas containing ammonia. The amount of absorbent charged during the washing step is controlled such that the ammonia concentration of gas exiting the washing step is 10 ppm or less.

    摘要翻译: 提供湿气净化方法,用于从重油气化气体如煤中除去氨。 该方法主要涉及洗涤步骤,在该步骤中将吸收剂装入气体中以吸收氨和氨处理步骤,其中将从洗涤步骤排出的吸收剂分离成流出物和含有氨的废气。 控制在洗涤步骤中加入的吸收剂的量使得离开洗涤步骤的气体的氨浓度为10ppm以下。

    Method for controlling the oxidation of sulfites in a flue gas
desulfurization process
    75.
    发明授权
    Method for controlling the oxidation of sulfites in a flue gas desulfurization process 失效
    控制烟道气脱硫工艺中亚硫酸盐氧化的方法

    公开(公告)号:US5766563A

    公开(公告)日:1998-06-16

    申请号:US767639

    申请日:1996-12-17

    摘要: A method of controlling the oxidation of sulfites in a flue gas desulfurization process involves treating the exhaust gas with an absorbing fluid containing a calcium compound and controlling the oxidation of sulfites by regulating oxygen flow into the absorbing fluid. Oxygen flow is controlled by continuously monitoring the oxidation-reduction potential (ORP) of the absorbing fluid relative to the same fluid in a completely oxidized state using a detector with a plurality of fluid tanks, one of which functions as a reference tank at any particular time. The fully oxidized reference tank is periodically switched, reducing adherence of oxidizing substances to the ORP electrodes, resulting in more accurate measurements and reduced chemical oxygen demand of the waste water.

    摘要翻译: 在烟道气脱硫工艺中控制亚硫酸盐氧化的方法包括用含有钙化合物的吸收液处理废气,并通过调节进入吸收流体的氧气来控制亚硫酸盐的氧化。 通过使用具有多个流体罐的检测器连续监测吸收流体相对于相同流体在完全氧化状态下的氧化还原电位(ORP)来控制氧气流,其中一个流体罐在任何特定的位置上用作参考罐 时间。 周期性地切换完全氧化的参比罐,减少氧化物质对ORP电极的粘附,从而进行更精确的测量并减少废水的化学需氧量。