Exhaust gas treatment system and test method of a gasoline engine bench

Abstract

An exhaust gas treatment system of a gasoline engine bench, comprising an exhaust gas test module and a manifold; the exhaust gas test module includes an exhaust pipeline, and a pre-catalyzed three-way catalytic device, main Three-way catalytic device, muffler, DOC device, decomposition pipe, SCR device, high-temperature fan, high-temperature shut-off valve and water washing tower; the outside of the high-temperature fan is equipped with a noise reduction room for reducing noise, and the end of the exhaust pipe is connected to the main pipe ; The main pipe is successively provided with a metal blanket filter, a total blower fan, and a muffler; the end of the main pipe communicates with the chimney; this program can process the harmful gas in the tail gas of the gasoline engine bench test process to the dischargeable value under the Beijing standard; Strong conversion ability and high efficiency; the decomposition tube adopts a waist structure to speed up the flow rate and reduce the risk of urea crystallization; it adopts a modular structure, which is easy to maintain and has good reliability.

Description

technical field [0001] The invention relates to an engine test system, in particular to an exhaust gas treatment system of a gasoline engine bench and a test method thereof. Background technique [0002] With the implementation of national strategies in the direction of environmental protection and safe housing, the requirements related to air pollution control and environmental protection have been strengthened, and the requirements for the control of engine vehicle exhaust and internal combustion engine pollutants have been increasingly deepened. The emission control and inspection of road vehicles are constantly being monitored Be strict. [0003] Located in various automobile companies, R&D centers, and colleges and universities, the internal combustion engine laboratory is used for internal combustion engine development and testing, as well as under the full load of ships and construction machinery. The pollutants discharged constitute the main component of the local po...

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Problems solved by technology

[0003] Located in various automobile companies, R&D centers, and colleges and universities, the internal combustion engine laboratory is used for internal combustion engine development and testing, as well as under the full load of ships and construction machinery. The pollutants discharged constitute the main component of the local pollution source; the test process In the harsh test of the medium-overload internal combustion engine, the pollutants discharged far exceeded the relevant regulations of the Air Pollution Prevention and Control Law, which brought troubles to the local energy saving and emission reduction.

[0004] The exhaust gas treatment system of the gasoline engine bench in the prior art also has the following problems: (1) the harmful gas processing capacity in the gasoline engine bench test process tail gas is not high, and cannot be processed to the dischargeable value under the Beijing standard; (2) ) DOC and SCR are used separately, and the treatment efficiency is not high; (3) SCR system is prone to urea crystallization; (4) Integral design, if a part cannot work, it will affect the entire system

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