Combined cleaning device for waste gas of low speed marine diesel engine

Abstract

The invention aims to provide a combined cleaning device for waste gas of a low speed marine diesel engine. The combined cleaning device comprises a cleaning device and a water supply system. The cleaning device comprises a shell and an air inlet duct wall arranged in the shell, an air inlet duct is formed in the air inlet duct wall, a cleaning region is formed between the air inlet duct wall and the shell, a demister and a spray layer are arranged in the cleaning region from top to bottom, a drainage opening is formed in the lower end of the shell, liquid membrane nozzles are arranged above the drainage opening and fixed to the inner wall of the shell, air nozzles are arranged between the liquid membrane nozzles and the air inlet duct wall, a first baffle is arranged on each gas nozzle, a second baffle is arranged above each first baffle, a third baffle is arranged above each second baffle, and an exhaust opening is formed in the portion, above the demister, of the shell. The water supply system is connected with the spray layer and the liquid membrane nozzles. An atomization spray device is omitted, strong vortexes are formed by the baffles many times, the liquid atomization and air-liquid contact area is increased, reaction time is prolonged, and the collection efficiency of SO2 and particles is improved.

Description

Technical field [0001] The invention relates to an exhaust gas washing device, specifically a ship exhaust gas washing device. Background technique [0002] With the development of the shipping industry, the low-speed diesel engine of ships will further increase the content of SO2 and particulate matter due to its low-quality heavy oil. Countries and regions such as IMO, Europe, the United States, and China have also formulated strict regulations to limit emissions from ships, so the requirements for the control of exhaust emissions are becoming more and more stringent. The SO2 and particulate matter discharged into the air by the main and auxiliary engines of ships and oil-fired boilers and other fuel-burning devices will cause great harm to humans and the environment. The Chinese government has also formulated relevant regulations for the emission of ship exhaust pollutants and determined The core port area within the emission control area. [0003] At present, the technologies...

AI Technical Summary

Problems solved by technology

[0006] Patent "A joint removal device for exhaust gas pollutants for two-stroke diesel engines (201410374452.6)", this patent uses spray technology to remove SO2 and particulate matter, and the tower shape is a packed tower. This technology is more widely used in propagation Extensive wet scrubbing technology, high removal efficiency for SO2, but unsatisfactory removal effect for particulate matter

[0007] Patent "A ship tail gas-tower desulfurization and particle removal device and its use method (201310344800.0)", this patent uses multi-layer packing and spraying to remove SO2 and particulate matter, which can remove SO2 and larger particles, but due to its multi-layer filler, the resistance is increased, and the removal effect on fine particles is not obvious, and the energy consumption is high

Images