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.
CN110566324BActive Publication Date: 2020-10-30WEICHAI POWER CO LTD
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Patent Information

Authority / Receiving Office
CN ¡ China
Patent Type
Patents(China)
Current Assignee / Owner
WEICHAI POWER CO LTD
Publication Date
2020-10-30

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Abstract

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.
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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...

Claims

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