Method for measuring oxidation-reduction potential in a flue gas
desulfurization process
    1.
    发明授权
    Method for measuring oxidation-reduction potential in a flue gas desulfurization process 失效
    测定烟气脱硫工艺中氧化还原电位的方法

    公开(公告)号:US5879945A

    公开(公告)日:1999-03-09

    申请号:US916251

    申请日:1997-08-22

    摘要: In a flue gas desulfurization process based on the wet lime-gypsum method, the controlled oxidation of sulfites, by comparison of the redox potential of an absorbing fluid in a sample tank and the redox potential of the absorbing fluid in a completely oxidized state in a reference tank, and adjustment of the rate of air flow through the absorbing fluid, is improved by removing peroxides from the absorbing fluid in the reference tank before passing air therethrough to effect oxidization to a completely oxidized state. The method avoids instability due to the presence of peroxides in the absorbing fluid.

    摘要翻译: 在基于湿石灰石膏方法的烟道气脱硫方法中,通过比较样品槽中的吸收液的氧化还原电位和完全氧化状态下的吸收液的氧化还原电位,可以控制亚硫酸盐的氧化 通过吸收流体的空气流速调节,通过在使空气通过之前从参考罐中的吸收流体中除去过氧化物,从而实现氧化至完全氧化状态。 该方法由于吸收液中过氧化物的存在而避免了不稳定性。

    Method for controlling the oxidation of sulfites in a flue gas
desulfurization process
    2.
    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。

    Method for controlling the oxidation of sulfites
    10.
    发明授权
    Method for controlling the oxidation of sulfites 失效
    控制亚硫酸盐氧化的方法

    公开(公告)号:US5560893A

    公开(公告)日:1996-10-01

    申请号:US472488

    申请日:1995-06-07

    CPC分类号: B01D53/504 Y10S423/05

    摘要: In a flue gas desulfurization process wherein, when sulfur oxide-containing exhaust gas is treated with an absorbing solution containing a calcium compound, an oxygen-containing gas is passed through the absorbing solution and the flow rate of the oxygen-containing gas is controlled by detecting the oxidation-reduction potential of the absorbing solution continuously, an oxidation controlling method which comprises detecting a first deviation signal between the oxidation-reduction potential of the absorbing solution and the oxidation-reduction potential of the absorbing solution in a completely oxidized state and controlling the flow rate of the oxygen-containing gas in response to a second deviation signal between the first deviation signal and a preset oxidation-reduction potential deviation value.

    摘要翻译: 在一种烟道气脱硫方法中,当含有含硫氧化物的废气用含有钙化合物的吸收溶液处理时,含氧气体通过吸收溶液,含氧气体的流量由 连续检测吸收液的氧化还原电位的氧化控制方法,其包括在完全氧化状态下检测吸收溶液的氧化还原电位与吸收溶液的氧化还原电位之间的第一偏差信号,并控制 响应于第一偏差信号和预设氧化还原电位偏差值之间的第二偏差信号,含氧气体的流量。