Diesel engine full-dimension SCR catalytic reactor performance test platform based on tail gas simulation

Abstract

The invention discloses a diesel engine full-dimension SCR catalytic reactor performance test platform based on tail gas simulation. A conventional full-dimensional SCR catalytic reactor performance test method based on diesel engine stand is high in cost, complex in process, poor in repeatability and long in period. An air supply system provides tail gas flow required for air speed test, a combustion heating system controls the tail gas temperature, a mixed charging system completes standard gas injection of key tail gas components and tail gas fully mixing, a urea injection system simulates an actual SCR system reducing agent adding process, and a signal acquisition and control system monitors the entire test platform and analyzes the performance of full-dimension SCR catalytic reactor under different test conditions. The full-dimension SCR catalytic reactor performance test platform can replace a diesel engine performance testing stand, and can comprehensively test and analyze the temperature characteristics, the ammonia-nitrogen ratio characteristics, air speed characteristics and pressure drop characteristics of a full-dimension SCR catalytic reactor for post-treatment of a diesel engine by simulating the tail gas flow, tail gas temperature and key tail gas components of the diesel engine.

Description

Technical field [0001] The invention relates to a diesel engine full-scale SCR catalytic converter performance test platform based on exhaust gas simulation, which can replace the traditional diesel engine performance test bench. By simulating diesel engine exhaust flow, exhaust temperature and key exhaust components, the full-scale SCR catalysis for diesel engine post-treatment The temperature characteristics, ammonia-nitrogen ratio characteristics, space velocity characteristics and pressure drop characteristics of the device are fully tested. Background technique [0002] With the increasingly stringent emission regulations worldwide, it has become a consensus to control vehicle diesel exhaust emissions through in-flight purification combined with high-efficiency exhaust after-treatment. The urea-based selective catalytic reduction SCR NOx reduction post-treatment technology has become the first technical route for new vehicle diesel engines to meet emission standards due to i...

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Problems solved by technology

[0004] The present invention aims at the problems existing in the performance test of the full-scale SCR catalytic converter based on the diesel engine test bench, such as large operating energy consumption, complicated adjustment of test working conditions, poor repeatability of the test process, and relatively long test period, etc., and proposes a method based on exhaust gas simulation. The diesel engine full-scale SCR catalytic converter performance test platform can replace the traditional diesel engine performance test bench. By simulating the diesel engine exhaust gas flow, exhaust gas temperature and key exhaust gas components, the temperature characteristics and ammonia nitrogen ratio characteristics of the full-scale SCR catalytic converter for diesel engine post-treatment , airspeed characteristics and pressure drop characteristics and other performances are fully tested

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