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Apparatus for removing soot and NOx in exhaust gas from diesel engines

A nitrogen oxide, diesel engine technology, applied in exhaust devices, mufflers, chemical/physical/physical-chemical processes of applying energy, etc., which can solve the problems of incomplete soot treatment and short reaction time.

Inactive Publication Date: 2003-05-28
BLUE PLANET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, the removal reaction of soot and NOx is only in NO 2 It occurs when the exhaust gas passes through the filter that collects the soot, and the reaction time is very short, so there is a disadvantage of incomplete treatment of the soot in the exhaust gas

Method used

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  • Apparatus for removing soot and NOx in exhaust gas from diesel engines
  • Apparatus for removing soot and NOx in exhaust gas from diesel engines
  • Apparatus for removing soot and NOx in exhaust gas from diesel engines

Examples

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Embodiment 2

[0086] In the plasma / dust filter / catalyst system of the present invention, with the gas samples shown in Table 2, and through the plasma reactor (20) and the catalytic reactor (30), the NOx removal performance was measured. No dust filter (10) was used in the measurement; a glass filter filled with glass wool was used in the catalytic reactor (30). A catalyst layer is provided behind the filter. Behind the plasma reactor (20) and the catalytic reactor (30), a NO detector (thermal environment instrument, model is 42H) (not shown) is connected respectively, and quantitatively detect NO and NO 2 concentration.

[0087] The plasma reactor (20) is a cylindrical device with an inner diameter of 36 mm and a length of 300 mm. The energy source is to provide 60HZ alternating current with a capacity of 15J / L per unit to the gas sample.

[0088] The catalyst uses a silver / alumina catalyst (Ag / Al2O3); and the reactor works at a temperature of 250-500°C.

[0089] name

NO (...

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Abstract

A plasma system is provided for removing soot and nitrogen oxide (NOx) in the exhaust gas of diesel engines. The system is comprised of a diesel particulate filter for adopting a honeycomb type porous element and at least one pair of electrodes; a plasma reactor for generating a predetermined amount of plasma, mounted downward or upward the diesel particulate filter; a catalytic reactor filled with a catalyst selected from 1B metal group, mounted downward the plasma reactor or the diesel particulate filter; and a means for supplying hydrocarbon to the exhaust gas, connected to a proper position upward the plasma reactor. Therefore, the soot and NOx in the exhaust gas, which are not only harmful to humans, but also which pollute the environment could be effectively removed under a normal pressure.

Description

technical field [0001] The invention is a device for removing soot (Soot) and nitrogen oxides (NOx) in the exhaust gas of a diesel engine by using a plasma / catalyst system. technical background [0002] Compared with gasoline engines, diesel engines have higher thermal efficiency, stronger durability, and CO, CO 2 And the emission of hydrocarbons is small, so it can reduce the advantages of causing global warming. However, nitrogen oxides (NOx) in diesel engine exhaust will generate photochemical smog, acid rain and ozone (O3). Moreover, compared with other particulate matter floating in the city, the particulate matter in the soot absorbs more light energy and makes the air turbid; if it is inhaled into the human body, it will be absorbed in the respiratory organs, Induce a variety of respiratory diseases. [0003] There are many methods for the treatment of diesel engine exhaust gas: such as the method of using a filter to filter out the soot by physical means; the use ...

Claims

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Application Information

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IPC IPC(8): F01N3/02B01D46/42B01D53/56B01D53/74B01D53/94B01J19/08F01N3/01F01N3/022F01N3/023F01N3/027F01N3/035F01N3/08F01N3/10F01N3/20F01N3/28F01N3/36F01N13/02
CPCF01N2610/03B01D53/9431F01N3/01F01N2330/06F01N3/0222F01N3/035F01N3/027F01N3/0892F01N2240/28F01N13/02F01N3/023F01N2330/10F01N13/009Y02A50/2351
Inventor 全光珉全培赫尹雄燮李宽荣黄正皓李教胜郑东勳李炯尚李大源柳在洪
Owner BLUE PLANET
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