Marine diesel particulate emission trapping device

Abstract

The invention discloses a marine diesel particulate emission trapping device. The device comprises a filtering system, a cleaning agent spraying and atomizing system and an air pulse back-blowing system; an air inlet of the marine diesel particulate emission trapping device is connected with a diesel engine exhaust main pipeline; an inlet stop valve is arranged on the diesel engine exhaust main pipeline; and the air inlet is communicated with a spraying pipe cavity of the cleaning agent spraying and atomizing system; the top of the spraying pipe cavity is provided with an atomizing nozzle which is used for spraying the cleaning agent in the spraying pipe cavity; the filtering system comprises filter bodies and a sealed filter box body arranged at the outlet of the spraying pipe cavity; thefilter bodies are wall flow type filter bodies; inner walls of flow channels of the filter bodies are silicon carbide spherical particle sintered wall surface; the air pulse back-blowing system comprises a high-pressure air pipeline and a plurality of pulse back-blowing nozzles, wherein the high-pressure air pipeline is connected with a high-pressure air source, and a plurality of the pulse back-blowing nozzles are arranged at the other end of the high-pressure air pipeline; and the pulse back-blowing nozzles extend into the filter box body and are opposite to a jetting direction of filter body outlets.

Description

Technical field [0001] The invention relates to the field of diesel engine particle traps, in particular to a back-blowing regeneration device of a marine diesel engine continuous regeneration catalytic type particle trap. Background technique [0002] Installing a conventional particulate matter trap (DPF) on the exhaust manifold of a ship's low-speed diesel engine will directly affect the performance of the diesel engine and the selective catalytic reduction (SCR) denitrification device. When the exhaust gas temperature is higher than 400℃, the chemical equilibrium conditions tend to In order to form NO, it is difficult to produce NO2, so the particles in the DPF cannot be ignited, and the regeneration efficiency drops sharply. Summary of the invention [0003] In view of the above technical problems, the present invention proposes a marine diesel engine particulate matter emission capture device. [0004] In order to achieve the above objectives, it is achieved through the follo...

AI Technical Summary

Problems solved by technology

[0002] Installing a conventional particulate filter (DPF) on the exhaust manifold of a ship's low-speed diesel engine will directly affect the performance of the diesel engine and the selective catalytic reduction (SCR) denitrification device. When the exhaust gas temperature is higher than 400 ° C, the chemical equilibrium condition tends to In order to form NO, it is difficult to produce NO2, so the particles in the DPF cannot be ignited, and the regeneration efficiency drops sharply

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