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    • 1. 发明公开
    • Flue gas SOx/NOx removal process and its by-product utilisation
    • Rauchgas SOx / NOx-Entfernungsverfahren und die Anwendung des Nebenproduktes。
    • EP0471278A1
    • 1992-02-19
    • EP91113249.6
    • 1991-08-07
    • Lin, Ping-Wha
    • Lin, Ping-Wha
    • B01D53/34
    • B01D53/60B01D53/508Y02A50/2344Y02A50/2348Y02A50/2349
    • Sulfur dioxide (S0 2 ) can be oxidized to rapidly sulfur trioxide (S0 3 ) in a high temperature environment. It has been found that the S0 2 oxidation rate can be impeded by a high rate of temperature reduction in a dynamic condition such as in a boiler and the ductwork of a power plant and an industrial plant. The mechanism of the reaction kinetics has been developed. With the understanding of the mechanism, the methods for oxidation of S0 2 to form SO 3 have been developed. The SO 3 rich flue gas is treated with lime (CaO) in a fluidized lime reactor wherein SO 3 reacts with CaO to form CaS0 4 coating on the surface of CaO. The high heat generated from the S0 3 /CaO reaction causes the remaining S0 2 to convert in the reactor to SO 3 which in turn reacts with CaO to form more CaS0 4 . Nitrogen oxides can also be removed from flue gas by converting nitric oxide (NO) to nitrogen dioxide (N0 2 ) via a high time rate of temperature reduction within ductwork and by sudden cooling with a spray of fine water mist or water vapor. N0 2 reacts with water vapor to form nitric acid which in turn reacts with lime to form calcium nitrate Ca(N0 3 ) 2 . The plant gas effluent, after treatment with the improved Lin flue gas SO x /NO x removal process, is essentially free from SO x , N0 2 , and particulate materials.
    • 二氧化硫(SO2)可在高温环境下氧化成三氧化硫(SO3)。 已经发现,在诸如锅炉和发电厂和工业设备的管道系统的动态条件下,SO 2氧化速率可能受到高温降低的阻碍。 已经开发了反应动力学的机理。 通过对机理的理解,开发了SO2氧化形成SO3的方法。 在流化石灰反应器中用石灰(CaO)处理富SO3烟道气,其中SO3与CaO反应形成CaO表面的CaSO 4涂层。 由SO 3 / CaO反应产生的高热量使剩余的SO 2在反应器中转化为SO 3,SO3又与CaO反应形成更多的CaSO 4。 氮氧化物也可以通过在管道系统内通过高时间的降温速率将硝酸氧化物(NO)转化为二氧化氮(NO2),并通过喷雾的细水雾或水蒸气进行突然冷却,从废气中除去。 NO2与水蒸气反应形成硝酸,硝酸又与石灰反应形成硝酸钙Ca(NO 3)2。 经过改良的废气SOx / NOx去除工艺处理后,工厂废气基本上不含SOx,NO2和颗粒物。
    • 2. 发明授权
    • Flue gas SOx/NOx removal process and its by-product utilisation
    • 烟道气的SO x / NO x去除处理和副产物的应用。
    • EP0471278B1
    • 1995-11-08
    • EP91113249.6
    • 1991-08-07
    • Lin, Ping-Wha
    • Lin, Ping-Wha
    • B01D53/34
    • B01D53/60B01D53/508Y02A50/2344Y02A50/2348Y02A50/2349
    • Sulfur dioxide (SO2) can be oxidized to rapidly sulfur trioxide (SO3) in a high temperature environment. It has been found that the SO2 oxidation rate can be impeded by a high rate of temperature reduction in a dynamic condition such as in a boiler and the ductwork of a power plant and an industrial plant. The mechanism of the reaction kinetics has been developed. With the understanding of the mechanism, the methods for oxidation of SO2 to form SO3 have been developed. The SO3 rich flue gas is treated with lime (CaO) in a fluidized lime reactor wherein SO3 reacts with CaO to form CaSO4 coating on the surface of CaO. The high heat generated from the SO3/CaO reaction causes the remaining SO2 to convert in the reactor to SO3 which in turn reacts with CaO to form more CaSO4. Nitrogen oxides can also be removed from flue gas by converting nitric oxide (NO) to nitrogen dioxide (NO2) via a high time rate of temperature reduction within ductwork and by sudden cooling with a spray of fine water mist or water vapor. NO2 reacts with water vapor to form nitric acid which in turn reacts with lime to form calcium nitrate Ca(NO3)2. The plant gas effluent, after treatment with the improved Lin flue gas SOx/NOx removal process, is essentially free from SOx, NO2, and particulate materials.