Burner meeting requirement of efficient regeneration in low-temperature condition of diesel particulate filter (DPF)

Abstract

The invention discloses a burner meeting the requirement of efficient regeneration in a low-temperature condition of a diesel particulate filter (DPF). The burner comprises a shell body, a combustion cavity, a gas inlet flow guide mixer, an inner combustion sleeve and a first-level outer combustion sleeve, and the combustion cavity, the gas inlet flow guide mixer, the inner combustion sleeve and the first-level outer combustion sleeve are arranged in the shell body. The gas inlet flow guide mixer is connected between the combustion cavity and the first-level outer combustion sleeve. The inner combustion sleeve is arranged in the first-level outer combustion sleeve. A nozzle is installed on the combustion cavity and is connected with an oil spraying pipe, and at least two sets of ignition devices are installed in the combustion cavity. A second-level outer combustion sleeve is connected to the tail end of the first-level outer combustion sleeve. The inner combustion sleeve, the first-level outer combustion sleeve and the second-level outer combustion sleeve are each provided with a plurality of air vents. The burner is compact in structure and convenient to disassemble, assemble and maintain, ignition failure can be avoided, the whole combustion process has a better heat effect, and combustion is sufficient.

Description

technical field [0001] The invention relates to a burner, in particular to a burner used in a selective catalytic conversion system of a diesel engine, which satisfies the high-efficiency regeneration of a particle trap DPF under low-temperature working conditions. Background technique [0002] At present, the rapid development of motor vehicles is accompanied by serious air pollution, showing the characteristics of regional complex. The air pollution in many big cities has changed from soot-type pollution to combined soot and motor vehicle pollution, and a few megacities have clearly shown photochemical smog-type (ie, motor vehicle exhaust) air pollution. Therefore, the research on diesel vehicle exhaust emission pollution control technology is extremely important and urgent. [0003] Particulate matter in diesel vehicle exhaust emissions is also a major pollutant. Particulate matter treatment technology mainly reduces particulate matter in exhaust by means of capture. In...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a burner that satisfies the high-efficiency regeneration of the DPF in the low-temperature working condition of the particle trap, so as to solve the problems of insufficient combustion and poor thermal effect in the burner used for active regeneration of the DPF to remove particles in the prior art

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