Integrated single-cabin heating regeneration denitration system special for waste gas of internal combustion engine and denitration method

Abstract

The invention discloses an integrated single-cabin heating regeneration denitration system special for waste gas of an internal combustion engine. The integrated single-cabin heating regeneration denitration system is characterized by comprising a denitration reactor, an air inlet main pipeline connected with the internal combustion engine and an air outlet main pipeline connected with the denitration reactor, wherein the denitration reactor is divided into four reactor cabins, the denitration reactor is internally provided with a soot blower and a denitration catalyst, the denitration reactoris further provided with four maintenance doors, pressure transmitters are arranged at the joints of the denitration reactor with the air inlet main pipeline and the air outlet main pipeline; and a fan-shaped electric butterfly valve is arranged between the air inlet main pipeline and the denitration reactor, an ammonia spraying device is arranged in the middle of the air inlet main pipeline anda spoiler is positioned below the ammonia spraying device. The system is simple and flexible, can be used for conducting on-line heating regeneration and overhauling, and is simple to operate, small in occupied area and high in efficiency.

Description

technical field [0001] The invention relates to an integrated single-chamber heating regeneration denitrification system and a denitrification method dedicated to exhaust gas of an internal combustion engine. Background technique [0002] Diesel engine exhaust is an important part of air pollutants. Among them, the sulfur (S) element contained in fuel oil produces sulfur dioxide (SO 2 ), carbon smoke, particulate matter and nitrogen oxides (NO x ) is an important component of PM2.5 particulate matter, and is also the main cause of acid rain and smog. Its production mechanism is: the diesel engine inhales air, while the cylinder piston moves downward, the compressed air releases heat, and the temperature in the cylinder rises at this time. When the ignition point of the fuel oil is reached, the fuel oil is atomized through the nozzle, sprayed into the cylinder, and then burns to release heat, forming a high temperature condition in the cylinder; and the sulfide contained i...

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Problems solved by technology

[0004] At this stage, there is no relatively mature exhaust gas heating and soot blowing device for diesel engine SCR system. It is difficult to safely and effectively solve the problem of covering and blocking the active site of SCR catalyst by ammonium sulfate species generated at low temperature, and most of the common reaction regeneration devices are multiple Cabin distribution type, scattered and redundant structure, low integration, cumbersome control, large footprint, difficult to apply to areas with limited installation space

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