A centralized purification system for exhaust flue of multiple diesel engine test benches

Abstract

The invention relates to an engine exhaust smoke passage integrated purification treatment technology for diesel engine test table frames, in particular to an exhaust smoke passage integrated purification system for a plurality of diesel engine test table frames. The exhaust smoke passage integrated purification system comprises a smoke gas constant-temperature pre-heating system, a urea metering spraying system, a urea water solution storage system, a compressed air purification system, a catalysis system, a control system and a monitoring system. An SCR (selective catalytic reduction) technology is used, the content of nitric oxides in the smoke gas can be effectively reduced, and the conversion efficiency can be higher than 90 percent; meanwhile, a DOC technology is used, HC in the smoke gas, CO, volatile organic compounds adsorbed on the surfaces of particles and the like can be oxidized into CO2, H2O and the like, so that the goal of lowering the particle exhaust total quantity is achieved, the harmful gas removing rate can reach 90 percent, and the total quantity of the particles can be reduced by 20 percent to 30 percent. The technology continuity of the whole set of smoke gas integrated purification system is high.

Description

technical field [0001] The invention belongs to the technical field of pollutant discharge reduction and environmental protection, and relates to a technology for centralized purification treatment of engine exhaust flues of diesel engine test benches, in particular to a centralized exhaust flue purification system of multiple diesel engine test benches. Background technique [0002] With the rapid growth of my country's economy, the total emissions of particulate matter and nitrogen oxides (NOx) in my country have risen, and they have become a major air pollutant, causing serious impacts on my country's ecological environment. Therefore, the emission control of particulate matter and nitrogen oxides is already an objective requirement for the country to take the road of sustainable development and protect the ecological environment, and the development of denitrification technology will also be an inevitable trend. [0003] At present, the water washing method is widely use...

AI Technical Summary

Problems solved by technology

However, when multiple engines are running at the same time, the engine operating conditions are unstable, so the engine emission MAP map cannot be obtained directly. In addition, the flue gas main pipe is long, and the temperature of the flue gas when it reaches the catalytic converter is low, which seriously affects the catalytic conversion of NOx. efficiency

Therefore, ordinary SCR technology is also difficult to support the centralized purification of the exhaust flue of multiple diesel engine test benches

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