Method and device for treatment of a gas flow

a gas flow and treatment method technology, applied in the direction of electrode construction, dispersed particle filtration, external electric electrostatic seperator, etc., can solve the problems of imposing a comparatively high pressure drop, regenerating at regular intervals, and comparatively low filtration capacity, so as to improve the treatment effect of gas flows

Inactive Publication Date: 2005-01-13
HEED CONSULTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides an improved treatment for gas flows, particularly during exhaust gas purification in combustion engines. The method involves filtering particles from the gas flow by accumulating them in ducts and controlling the temperature of the gas flow to combust the particles. The invention combines the functions of heat exchange and particle filtration, resulting in energy savings and reduced emissions of carbon dioxide. The invention is useful for reducing emissions from diesel engines and other engines that operate with surplus oxygen."

Problems solved by technology

One disadvantage of such ceramic filters is that they must be regenerated at regular intervals; that is, particles that have been accumulated in the filter must be removed from the wall structure after some time of use.
Although this type of filter functions satisfactorily in principle, it has certain disadvantages, such as, because of its construction, it imposes a comparatively high fall in pressure thereacross.
Furthermore, it has a comparatively low filtration capacity because it is based on surface filtration across a comparatively small surface.
Furthermore, the pressure loss over such a filter increases over the years, which is due to the fact that ashes gradually obstruct the filter.
When the vehicle subsequently increases the load, spontaneous ignition may occur and which can permanently damage the filter.

Method used

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  • Method and device for treatment of a gas flow
  • Method and device for treatment of a gas flow
  • Method and device for treatment of a gas flow

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Embodiment Construction

Cross Reference to Related Applications

[0001] This application is a continuation patent application of International Application No. PCT / SE01 / 02135 filed 3 October 2001 which was published in English pursuant to Article 21(2) of the Patent Cooperation Treaty, and which claims priority to Swedish Application No. 0003578-2 filed 4 October 2000. Both applications are expressly incorporated herein by reference in their entireties.

TECHNICAL FIELD

[0002] The present invention relates to methods and devices for the treatment of a gas flows that include guiding the gas flow through a gas treatment unit adapted for filtering particles from the gas flow and eliminating those particles at the gas treatment unit. More particularly, the invention is intended to be used for separating and eliminating particles from the exhaust gases of a combustion engine. The invention also relates to a device for accomplishing such a treatment of a gas flow.

BACKGROUND OF THE INVENTION

[0003] In the field of vehic...

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Abstract

Abstract of the DisclosureMethod and apparatus for treating a gas flow including guiding the gas flow through a gas treatment unit (18) adapted for filtering particles in the gas flow, and eliminating the particles in the gas treatment unit (18). Particles are filtered from the gas flow by means of accumulating the particles in, or in connection with, a number of ducts (21) forming part of the gas treatment unit (21) during passage of the gas flow through the gas treatment unit (18). The temperature of the gas flow is controlled along the ducts (21) to a value that provides combustion of the particles, and eliminates the filtered particles in the gas treatment unit (18) by means of combustion in the ducts (21). An improved treatment of a gas flow is provided, in particular in connection with exhaust gas purification in a diesel engine, for eliminating particles in its exhaust gases.

Description

Detailed Description of the InventionCross Reference to Related Applications[0001] This application is a continuation patent application of International Application No. PCT / SE01 / 02135 filed 3 October 2001 which was published in English pursuant to Article 21(2) of the Patent Cooperation Treaty, and which claims priority to Swedish Application No. 0003578-2 filed 4 October 2000. Both applications are expressly incorporated herein by reference in their entireties.TECHNICAL FIELD[0002] The present invention relates to methods and devices for the treatment of a gas flows that include guiding the gas flow through a gas treatment unit adapted for filtering particles from the gas flow and eliminating those particles at the gas treatment unit. More particularly, the invention is intended to be used for separating and eliminating particles from the exhaust gases of a combustion engine. The invention also relates to a device for accomplishing such a treatment of a gas flow.BACKGROUND OF THE ...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): F01N3/02B01D46/42B03C3/04B03C3/45F01N3/01F01N3/021F01N3/022F01N3/025F01N3/035F01N3/037F01N3/08F01N3/24
CPCF01N3/01F01N3/0215F01N3/022F01N3/0222F01N3/0842F01N3/035F01N3/037F01N3/0821F01N3/0253
InventorJOBSON, EDWARDHEED, BJORN
OwnerHEED CONSULTING