System for controlling reductant injecting amount in denitration apparatus
专利汇可以提供System for controlling reductant injecting amount in denitration apparatus专利检索，专利查询，专利分析的服务。并且PURPOSE: To enable to carry out stable control of a reductant injecting amount in good responsiveness even when the NOX total amount in a treating gas is varied in a wide range by a method wherein average denitrating efficiency is calculated every at a definite time and the calculated result is used as the set signal of an NH
3 injecting mole ratio.
CONSTITUTION: Difference of NOX concn. between the inlet and the outlet of a catalyst layer is calculated by NOX densitometers 11a, 11b and an operator 15 and a ratio of said concn. difference and the NOX concn. of the inlet side thereof is calculated by an operator 16 and deviation of the calculated value and a predetermined denitrating efficiency set signal 21 is calculated by a controller 22 to be used as the set signal of an NH
3 pouring mole ratio. The NOX concn. signals of the inlet and the outlet sides of the catalyst layer is applied to computer and average denitrating efficiency is issued every at a definite time to be imparted to a denitration efficiency controller 22 as a feedback signal. An NH
3 demand amount obtained by multiplying the inlet NOX total amount calculated from the inlet side NOX concn. and a treating gas flow amount signal 20 and the injecting mole ratio of the controller 22 in an operator 19 is compared to a practical NH
3 flow amount in a controller 24 and, corresponding to the comparison date, an NH
3 flow amount control valve 6 is adjusted to enable to carry out stable control.
COPYRIGHT: (C)1982,JPO&Japio，下面是System for controlling reductant injecting amount in denitration apparatus专利的具体信息内容。
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