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    • 5. 发明授权
    • Simplified efficient process for reducing NO.sub.x, SO.sub.x, and
particulates
    • 用于减少NOx,SOx和微粒的简化有效过程
    • US5658547A
    • 1997-08-19
    • US406206
    • 1995-03-16
    • Stanislaw MichalakJoseph R. ComparatoJohn E. Hofmann
    • Stanislaw MichalakJoseph R. ComparatoJohn E. Hofmann
    • B01D53/50B01D53/56B01D53/60F23J7/00F23J15/00C01B17/22
    • F23J7/00B01D53/501B01D53/505B01D53/565B01D53/60F23J15/006B01D2251/206F23J2215/101F23J2215/20F23J2217/101F23J2900/15081
    • The removal of SO.sub.x and particulates, and preferably also NO.sub.x, from the combustion gases of a large boiler, is simplified while efficiency is improved. In a primary treatment zone, a slurry comprising an alkaline SO.sub.x -reducing composition and preferably a nitrogen-containing composition effective to reduce NO.sub.x, is introduced into combustion gases at a temperature of from about 900.degree. to about 1300.degree. C. The gases are cooled by initial contact with steam-generating means, and then by contact with an gas-to-gas heat exchanger. Cooled gases are then subjected to a secondary treatment in which they are first humidified and further cooled by introduction of a water spray or aerosol to reduce the temperature to 100.degree. C. or below. Contact between the SO.sub.x -reducing composition and the humidified gases is maintained for a reaction period of at least 2 seconds. Particulate solids are then separated from the gases with a fabric filter. The cleaned gases are reheated by the gas-to-gas heat exchanger prior to discharge to the atmosphere. Reductions of SO.sub.x of greater than 80% are achieved, preferably 90 to 95%.
    • 从大型锅炉的燃烧气体中除去SOx和微粒,最好是除去NO x也被简化,同时提高了效率。 在初级处理区中,在约900℃至约1300℃的温度下将包含碱性SOx还原组合物和优选含有有效降低NOx的含氮组合物的浆料引入燃烧气体中。将气体冷却 通过与蒸汽发生装置的初始接触,然后通过与气体 - 气体热交换器接触。 然后对冷却的气体进行二次处理,其中它们首先被加湿并通过引入喷水或气溶胶进一步冷却,以将温度降至100℃或更低。 SO x还原组合物与加湿气体之间的接触保持至少2秒的反应时间。 然后用织物过滤器将颗粒状固体与气体分离。 清洁的气体在排放到大气中之前由气体 - 气体热交换器再加热。 实现了大于80%的SOx的减少,优选为90〜95%。
    • 6. 发明授权
    • Method of regulating the amount of reducing agent added during catalytic
reduction of NO.sub.x contained in flue gases
    • 调节烟气中所含NOx催化还原过程中还原剂添加量的方法
    • US4681746A
    • 1987-07-21
    • US784721
    • 1985-10-04
    • Stanislaw MichalakKlaus-Dieter WeberJurgen Meier
    • Stanislaw MichalakKlaus-Dieter WeberJurgen Meier
    • B01D53/56B01D53/74B01D53/86B01J8/06C01B21/00C01B31/00
    • B01D53/8696B01D53/8625
    • A method of regulating the amount of reducing agent added, especially NH.sub.3 in the case of the catalytic reduction of NO.sub.x of flue gases which originate from a combustion installation which is fired with fossil fuels. The adjustment value for the quantity to be added is determined in response to a prescribed reducing agent/NO.sub.x stoichiometry factor from the quantity of combustion air supplied to the combustion installation or from the exiting quantity of flue gas, and from the NO.sub.x concentration downstream ahead of the catalyzer. Regulation is effected by influencing the stoichiometry factor. The NO.sub.x concentration downstream after the catalyzer is returned to the regulation process as the primary correction value, and the reducing agent concentration downstream after the catalyzer, and the flue gas temperature ahead of the catalyzer, are returned to the regulation process as the secondary correction values. The set stoichiometry factor is influenced such that while maintaining the emission light value as the desired value of the primary correction value, and while maintaining a reducing agent concentration downstream after the catalyzer below a prescribed fixed value in a range of from 50 ppm to 3 ppm volume, preferably less than 10 ppm volume, the stoichiometry factor is regulated via the temperature-dependent activity curve of the catalyzer.
    • 在由化石燃料燃烧的燃烧装置产生的烟道气的NOx的催化还原的情况下,调节添加的还原剂的量,特别是NH 3的方法。 根据规定的还原剂/ NOx化学计量因子,从供给到燃烧装置的燃烧空气量或排出的烟道气量,以及从NOx排放量的下游排出的NOx浓度来确定要添加量的调整值 催化剂。 调节是通过影响化学计量因子来实现的。 催化剂下游的NOx浓度作为主要校正值返回到调节过程,并且在催化剂之后的下游的还原剂浓度和催化剂之前的烟道气温度作为二次校正值返回到调节过程 。 影响设定的化学计量因子,使得在将发光值保持为主要校正值的期望值的同时,并且在将催化剂下游的还原剂浓度保持在低于规定的固定值的范围内,范围为50ppm至3ppm的同时 体积,优选小于10ppm体积,化学计量因子通过催化剂的温度依赖性活性曲线调节。
    • 10. 发明授权
    • Method of regulating the amount of reducing agent added during catalytic
reduction of NO.sub.x contained in flue gases
    • 调节烟气中所含NOx催化还原过程中还原剂添加量的方法
    • US4565679A
    • 1986-01-21
    • US661892
    • 1984-10-17
    • Stanislaw MichalakKlaus-Dieter WeberJurgen Meier
    • Stanislaw MichalakKlaus-Dieter WeberJurgen Meier
    • B01D53/56B01D53/74B01D53/86B01J8/00C01B21/00C01G31/00
    • B01D53/8696B01D53/8625
    • A method of regulating the amount of reducing agent added, especially NH.sub.3 in the case of the catalytic reduction of NO.sub.x of flue gases which originate from a combustion installation which is fired with fossil fuels. The adjustment value for the quantity to be added is determined in response to a prescribed reducing agent/NO.sub.x stoichiometry factor from the quantity of combustion air supplied to the combustion installation or from the exiting quantity of flue gas, and from the NO.sub.x concentration downstream ahead of the catalyzer. Regulation is effected by influencing the stoichiometry factor. The NO.sub.x concentration downstream after the catalyzer is returned to the regulation process as the primary correction value, and the reducing agent concentration downstream after the catalyzer, and the flue gas temperature ahead of the catalyzer, are returned to the regulation process as the secondary correction values. The set stoichiometry factor is influenced such that while maintaining the emission limit value as the desired value of the primary correction value, and while maintaining a reducing agent concentration downstream after the catalyzer below a prescribed fixed value in a range of from 50 to 3 ppm volume, preferably less than 10 ppm volume, the stoichiometry factor is regulated via the temperature-dependent activity curve of the catalyzer.
    • 在由化石燃料燃烧的燃烧装置产生的烟道气的NOx的催化还原的情况下,调节添加的还原剂的量,特别是NH 3的方法。 根据规定的还原剂/ NOx化学计量因子,从供给到燃烧装置的燃烧空气量或排出的烟道气量,以及从NOx排放量的下游排出的NOx浓度来确定要添加量的调整值 催化剂。 调节是通过影响化学计量因子来实现的。 催化剂下游的NOx浓度作为主要校正值返回到调节过程,并且在催化剂之后的下游的还原剂浓度和催化剂之前的烟道气温度作为二次校正值返回到调节过程 。 影响设定的化学计量因子,使得在将发射极限值保持为主要校正值的期望值的同时,并且在将催化剂下游的还原剂浓度保持在低于规定的固定值的范围内,范围为50至3ppm体积 ,优选小于10ppm体积,化学计量因子通过催化剂的温度依赖性活性曲线调节。