A method and device for controlling nitrogen oxides in multiple diesel engines

Abstract

The invention proposes a method and a device for controlling nitrogen oxides of multiple diesel engines. Diesel engine bench is an essential part in the production process of diesel engine testing. In order to solve the pollution problem of diesel engine benches, the state has formulated atmospheric regulations to restrict the discharge of bench pollutants. A device system for realizing the above method is composed of a plurality of engine stands, a distributed post-processing module, a general smoke exhaust pipe, and a centralized monitoring module, and is applicable to the scene where a plurality of diesel engine stands share one general exhaust pipe. The method is to independently treat the nitrogen oxide exhaust gas of the diesel engine on each platform, and the treated exhaust gas is collected to the general exhaust pipe; the centralized monitoring module is based on the current nitrogen oxide exhaust gas of the general exhaust pipe. The relationship between the value and the limit value of atmospheric regulations, and automatically adjust the nitrogen oxide treatment efficiency of each bench corresponding to the exhaust gas treatment device in real time.

Description

technical field [0001] The invention belongs to the field of nitrogen oxide treatment of diesel engine stands, in particular to a method and a device for controlling nitrogen oxides (NOx) of multiple diesel engine stands. Background technique [0002] During the manufacturing process, engine manufacturers need to conduct various performance tests on the products before they leave the factory. Manufacturers build benches according to regulations and test the performance of engine prototypes in accordance with relevant test procedures. Diesel engine bench is an essential part in the test production process of diesel engine. Its main function is to simulate the operation test of diesel engine, check whether the quality of diesel engine is up to standard, whether there are problems in the operation process, reliability verification, etc. The test bench of an engine manufacturer is usually composed of multiple engine prototypes. During the bench test performed by the manufacture...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the defects of existing diesel engine multi-bench nitrogen oxide (NOx) control, collects the NOx concentration and mass flow of a single stand by a centralized monitoring module, and calculates the NOx concentration and mass flow of the exhaust main pipe; according to atmospheric regulations The NOx concentration and mass flow limit specified in the medium, to determine whether the NOx concentration and total mass flow are up to standard

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