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Device and method for removing nitrogen oxides from marine diesel engine tail gas

A technology for marine diesel engines and nitrogen oxides, applied in exhaust devices, chemical instruments and methods, separation methods, etc., can solve the problems of poor tail gas treatment effect under dynamic working conditions, cumbersome process, and difficult to handle by-products, etc., to achieve Guarantee long-term effective treatment, increase absorption effect, and good treatment effect

Active Publication Date: 2020-09-25
HARBIN ENG UNIV
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Problems solved by technology

However, there are still many deficiencies in the currently developed technical methods for the treatment of NOx in ship exhaust gas, such as poor exhaust gas treatment effect under dynamic conditions, complex devices, large footprint, cumbersome process, high reaction conditions, and catalyst poisoning , Dealing with by-products that are difficult to handle and catalyst leakage and pollution

Method used

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  • Device and method for removing nitrogen oxides from marine diesel engine tail gas
  • Device and method for removing nitrogen oxides from marine diesel engine tail gas

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Embodiment Construction

[0029] The present invention is described in detail below in conjunction with accompanying drawing:

[0030] figure 1 It is a schematic diagram of the marine diesel engine tail gas NOx treatment device of the present invention. In the figure, 1-marine diesel engine, 2-electrostatic precipitator, 3-first plasma generator, 4-packed bed reactor, 5-high voltage generator, 6-power supply device, 7-gas desorption tower, 8-lean Oxygen gas supply device, 9-gas mixing tank, 10-second plasma generator, 11-electric control valve, 12-four-way electric control valve, 13-adsorbent delivery pump, 14-first low-temperature plasma generator Gas inlet, 15-gas outlet of the first low-temperature plasma generator, 16-gas inlet of packed bed reactor, 17-gas outlet of packed bed reactor, 18-adsorbent inlet of packed bed reactor, 19-adsorption of packed bed reactor Agent outlet, 20-gas desorption tower adsorbent inlet, 21-gas desorption tower adsorbent outlet, 22-gas desorption tower tail gas inlet...

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Abstract

The invention discloses an apparatus for removing nitrogen oxide in tail gas of a marine diesel engine and a removal method thereof, which belong to the technical field of exhaust-gas treatment of the marine diesel engine. The main fuel oil of the marine diesel engine is heavy fuel oil, and the tail gas contains a lot of nitrogen oxide. Through a mode by combining plasma and an adsorption phase, the novel technical design and the method are employed for processing NOx in the tail gas. A packed bed reactor is used for cyclic adsorption, at the same time, a low-temperature plasma technology is used for processing the tail gas, the NOx gas in the tail gas of the marine diesel engine can be effectively processed under normal temperature, and a final product is the elemental harmless gas. According to the invention, participation of a catalyst is not required for a tail gas processing method, secondary processing is not required for the final product, the equipment investment and equipment land occupation area are reduced, and the effective processing requirement on the tail gas of the marine diesel engine under dynamic complex condition is satisfied.

Description

technical field [0001] The invention relates to a device and method for removing nitrogen oxides from tail gas of marine diesel engines, and belongs to the technical field of exhaust gas treatment of marine diesel engines. Background technique [0002] At present, the common fuel oil used in marine diesel engines is heavy fuel oil, and its exhaust gas contains a large amount of nitrogen oxides (NOx=NO+NO 2 ) gas, which can cause a series of environmental problems such as acid rain, photochemical smog, and ozone hole, and seriously damage the earth's ecosystem. At the same time, it irritates the eyes, nose, throat and lungs of people, easily causes respiratory diseases, and causes great harm to the human body. The International Maritime Organization has formulated a relatively strict pollution prevention convention, which has imposed strict restrictions on ship exhaust NOx. Relevant researchers are also actively developing ship exhaust NOx treatment devices, the purpose is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/92B01D53/56B01D53/32B01D53/02F01N3/01F01N3/08F01N5/02
CPCB01D53/02B01D53/323B01D53/56B01D53/92B01D2258/012B01D2259/4009B01D2259/818F01N3/01F01N3/0807F01N3/0892F01N5/02F01N2240/04F01N2240/18F01N2240/28F01N2570/14Y02T10/12
Inventor 周松席鸿远朱元清周金喜王占广高瑞锋
Owner HARBIN ENG UNIV
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