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Method and device for treating marine exhaust gas

A waste gas treatment device and waste gas treatment technology, which are applied in separation methods, chemical instruments and methods, and air quality improvement, etc., can solve the problems that cannot be directly applied to desulfurization and denitrification technology and equipment of power plant boilers, and achieve compact structure, prevent diffusion, The effect of high catalytic efficiency

Active Publication Date: 2018-04-24
QINGDAO HEADWAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above characteristics make it impossible to directly apply the desulfurization and denitrification technology and equipment of power plant boilers to the treatment of ship flue gas, which has become one of the industrial problems of flue gas treatment.

Method used

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  • Method and device for treating marine exhaust gas

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Experimental program
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Effect test

Embodiment 1

[0033] like figure 1 As shown, the ship exhaust gas treatment method in the present invention, its working process is: exhaust gas enters the dust removal device from the exhaust gas inlet, in the dust removal device, solid suspended particles are removed and discharged into the residue recovery tank, and the exhaust gas after dust removal is in the gas mixing cabinet After fully mixing with the methane in the methane storage cabinet, the preferred value of the methane content in the methane cabinet is 0.2%--0.5%. The mixed gas enters the zeolite reaction unit, and the heating device heats the zeolite reaction unit at the same time, heating the reaction temperature to 300~400℃, nitrogen oxides and sulfur dioxide are converted and removed under the catalysis of zeolite, and the converted waste gas products enter the elution unit, and the SO in the waste gas 3 and some CO 2 It is absorbed by seawater again, and the marine exhaust gas is purified. The purified exhaust gas enter...

Embodiment 2

[0035] The waste gas enters the dust removal device from the waste gas inlet, and the solid suspended particles in the waste gas are removed in the dust removal device, and the screened particles are directly discharged into the residue recovery tank. After dedusting, the exhaust gas enters the gas mixing cabinet and mixes with methane.

[0036]In the zeolite reaction unit, ZSM-5 artificial zeolite molecular sieve, Cu and Ni are loaded on this zeolite. At a temperature of 530°C, the simulated exhaust gas contains 0.2% NO, 0.15% SO2, and 0.25% O2. 0.35% CH4 is introduced into the methane storage cabinet, which can desulfurize and denitrify at the same time. After exhaust gas detection, the denitrification rate is stable at 98%, and the desulfurization rate is stable at more than 95%. The main reaction principle is:

[0037] 2NO=N 2 +O 2

[0038] 2NO+O 2 =2NO 2

[0039] 2SO 2 +O 2 =2SO 3

[0040] CH 4 +2O 2 =CO 2 +2H 2 o

[0041] CH 4 +2NO 2 =N 2 +CO 2 +2H ...

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Abstract

The invention discloses a ship exhaust gas treatment method and device. The method comprises dust removal by filtration, mixing with methane gas, zeolite-based nitrogen removal and desulphurization, elution, and monitoring and feedback. Methane is used as reduction gas. Through combination of the above steps, ship exhaust gas satisfies discharge standards. The invention also discloses the ship exhaust gas treatment device. The device comprises a control case, a dust collector, a gas mixing cabinet, a methane storage cabinet, a zeolite reaction unit, a heating device, an elution unit, an on-line monitoring unit and a residue recovery tank. The dust collector is connected to the residue recovery tank. The gas mixing cabinet is connected to the zeolite reaction unit. The zeolite reaction unit and the heating unit are arranged in the same cabinet. The zeolite reaction unit is connected to the elution unit. The device has a compact structure, can be operated flexibly, has high catalysis efficiency, has a low cost and can prevent harmful gas diffusion.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method and device for treating marine waste gas. Background technique [0002] The emission of harmful substances in ship exhaust gas is a major source of air pollution. With the increasing importance of environmental protection issues, reducing the emission of harmful substances has become an important development direction of ship exhaust gas in the world today. Therefore, the pollution caused by exhaust gas from ships has attracted more and more attention from the international community. MARPOL Annex VI "Rules for the Prevention of Air Pollution from Ships" formulated by the International Maritime Organization (IMO) came into force on January 1, 2000. Tier III, the stricter NOx emission limit standard, will also come into force in 2021. Emissions of nitrogen oxides and sulfur oxides are increasingly strictly controlled. At present, the technology for wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/90B01D53/60B01D53/75B01D46/00
CPCY02A50/20
Inventor 刘炳言杨晓丹刘伟勋刘晓翠曹学磊曹学良
Owner QINGDAO HEADWAY TECH