Catalyst efficiency monitoring method and device
A catalyst and high-efficiency technology, applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, machines/engines, etc., can solve problems such as volatile, vanadium-based catalyst failure, etc.
Active Publication Date: 2020-10-30
WEICHAI POWER CO LTD
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[0004] However, the active component vanadium pentoxide (V 2 o 5 ) is volatile at high temperature, and there is a risk of vanadium-based catalyst failure
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[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0047] There are two commonly used catalysts, vanadium-based metal oxide catalysts and molecular sieve catalysts. Vanadium-based metal oxide catalysts have become the earliest and most widely used SCR catalysts due to their mature technology, good sulfur resistance and low price. However, the active component vanadium pentoxide (V 2 o 5 ) is volatile at high temperature, and there is a risk of vanadium-based catalyst failure.
[0048] In order to solve this...
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The invention discloses a method and a device for monitoring catalyst efficiency. The method comprises the steps of: determining vanadium volatilization rates corresponding to various operating conditions of an engine, and acquiring the operating time of the engine in each operating condition; determining the total volatilization amount of a vanadium-based catalyst based on the operating time andthe vanadium volatilization rate corresponding to each operating condition; and finally, determining the catalytic reduction efficiency of the vanadium-based catalyst based on the total volatilizationamount of the vanadium-based catalyst. According to the method adopting the abovementioned scheme, the total volatilization amount of the vanadium-based catalyst is determined based on the operatingtime and the vanadium volatilization rate corresponding to each working condition, and the catalytic reduction efficiency of the vanadium-based catalyst is determined based on the total volatilizationamount of the vanadium-based catalyst, so that whether the vanadium-based catalyst has failure risk or not is determined in advance.
Description
technical field [0001] The invention relates to the technical field of tail gas post-treatment, and more specifically, to a catalyst efficiency monitoring method and device. Background technique [0002] With the country's emphasis on environmental protection, strict requirements have been put forward for the pollutants produced by the volatilization of catalysts in the exhaust gas after-treatment device. [0003] Currently, there are two commonly used catalysts, vanadium-based metal oxide catalysts and molecular sieve catalysts. Vanadium-based metal oxide catalysts have become the earliest and most widely used SCR catalysts due to their mature technology, good sulfur resistance and low price. [0004] However, the active component vanadium pentoxide (V 2 o 5 ) is volatile at high temperature, and there is a risk of vanadium-based catalyst failure. Contents of the invention [0005] In view of this, the present invention provides a catalyst efficiency monitoring method...
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IPC IPC(8): F01N11/00
CPCF01N11/00F01N2900/1622Y02T10/40
Inventor 吕志华李志杰文志永孙婷张学敏
Owner WEICHAI POWER CO LTD