Waste gas pollutant combined removal device for two-stroke diesel engine

Abstract

The invention provides a waste gas pollutant combined removal device for a two-stroke diesel engine. The waste gas pollutant combined removal device comprises a waste gas washing device and a recirculation waste gas flow control device, the waste gas washing device comprises a washer, a washing solution storage box, a circulation pump, a SOx absorbing agent supply device and a fresh waste supply device, and the recirculation waste gas flow control device comprises a flow regulating valve, a recirculating draught fan and a one-way control valve. According to the waste gas pollutant combined removal device, waste gas of the two-stroke diesel engine is washed, the SOx content and the particle content in the waste gas are reduced, part of low-temperature clean waste gas is recirculated, the NOx generation amount of the engine is reduced, and combined desulfurization and denitration of waste gas pollutants of the ship diesel engine is achieved. According to the waste gas pollutant combined removal device, part of washed waste gas is recirculated, the combustion condition in a cylinder is improved to a large extent,by CO2 and vapor contained in the low-temperature clean waste gas and the NOx generation amount and the final discharge amount of the engine are reduced.

Description

technical field [0001] The invention relates to a ship exhaust pollutant emission control device, in particular to a combined NOx and Sox removal device for a ship two-stroke diesel engine meeting the International Maritime Organization (IMO) ship exhaust pollutant emission regulations. Background technique [0002] In order to reduce ship operating costs, commercial ships use high-sulfur heavy oil, and the NOx and SOx produced by engine combustion cause serious harm to the marine atmosphere and port environment. [0003] IMO has imposed strict restrictions on NOx and SOx emissions from ship engine exhaust. [0004] At present, commonly used NOx emission reduction measures mainly include in-machine emission reduction measures and out-of-machine emission reduction measures. The internal emission reduction measures are through certain methods, such as delaying fuel injection in the cylinder, improving the fuel injection law, reducing the intake air temperature, increasing the...

AI Technical Summary

Problems solved by technology

This exhaust gas series treatment method has huge equipment volume and high back pressure, which has a great impact on the normal operation of the engine, and the equipment investment and operation costs are very high.

[0007] So far, there is no integrated treatment device for NOx and SOx emitted by marine two-stroke diesel engines at home and abroad, so that on the basis of meeting the IMO NOx and SOx emission requirements, the volume and cost of the emission reduction device can be reduced, and the emission reduction can be reduced. Influence of platooning equipment on ship operating cost and effective space

Images