Exhaust SCR denitration purification silencer for marine diesel engine

Abstract

The invention relates to an exhaust aftertreatment technology, in particular to an exhaust SCR denitration purification silencer for a marine diesel engine. A SCR denitration reactor and the silencerin an exhaust system of the marine diesel engine are integrated together, the problem of space shortage when the exhaust system of the marine diesel engine is arranged on a ship is solved, and the installation space and the initial installation cost are saved. The exhaust SCR denitration purification silencer adopts a drawer type method to install catalyst carriers required by SCR denitration reaction, so that the catalyst carriers are convenient to replace; and the catalyst is attached to the surfaces of the catalyst carriers, so that the reaction rate of ammonia gas and nitric oxide can be effectively increased; a flow guide device at an air inlet enables waste to enter the catalyst carriers more uniformly, a steel plate on which four communicating pipes with silencing holes distributedin the outer surfaces are mounted is arranged between two layers of catalyst carriers, exhaust gas is expanded and contracted many times, and most of low-frequency noise can be reduced.

Description

technical field [0001] The invention relates to an exhaust post-treatment technology, in particular to a marine diesel engine exhaust post-treatment technology, more precisely a marine diesel engine exhaust SCR denitrification purification muffler. Background technique [0002] Nitrogen oxides (NOx) are one of the main harmful emissions from marine diesel engines, causing serious harm to the environment and human health. IMO (International Maritime Organization) passed the 1997 Protocol of the "1VIARPOL73 / 78 Convention" in September 1997, and added annex VI "Regulations on the Prevention of Air Pollution from Ships", which was issued to my country on August 23, 2006. take effect. In October 2008, IMO formally passed the amendment "NOx Technical Regulations" to MARPOL73 / 78 Annex VI, which proposed three-stage limit value requirements for NOx emissions. Controlling NOx emissions from marine engines has become an important issue in preventing air pollution caused by ships. Th...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of ship exhaust SCR out-of-pin purification muffler equipment to solve the problems of ship exhaust purification and silencing equipment occupying a large amount of space inside the ship, poor exhaust treatment and silencing effects, and maintenance and disassembly of exhaust reaction catalyst carriers. The problem of inconvenience

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