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after treatment system

A carrier and dowel technology, applied in the field of exhaust gas after-treatment systems, can solve the problems of complex removal and replacement of a single catalyst

Active Publication Date: 2018-04-20
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, where multiple catalysts are included in a housing or module, especially in exhaust systems associated with large powertrains, the removal and replacement of individual catalysts can be complicated

Method used

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Embodiment Construction

[0016] The present invention relates generally to exhaust aftertreatment systems and, more particularly, to catalysts for selective catalytic reduction (SCR) suitable for recovery from such systems. Referring now to the drawings, wherein like reference numerals represent like elements, figure 1 Shown in is a power system 100 capable of generating power by burning fossil fuels or the like. The illustrated power system 100 may include an internal combustion engine 102 , such as a diesel engine, operably coupled to a generator 104 for generating electricity. The internal combustion engine 102 may have any number of cylinders as desired by those skilled in the art. The internal combustion engine 102 and the generator 104 may be supported on a common mounting frame 106 . The power system 100 may provide on-site backup power or continuous electrical power in locations where access to the grid is limited or unavailable. Accordingly, the generator 104 and internal combustion engine...

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Abstract

An aftertreatment system is disclosed that includes a selective catalytic reduction (SCR) catalyst insertable into an open upstream end of a sleeve. The SCR catalyst includes a carrier matrix with catalytic material extending between a first side and a second side. Surrounding the carrier matrix is ​​a shroud extending between a first outer edge proximate the first face and a second outer edge proximate the second face. The cover may include an overhang extending the first outer edge of the cover beyond the first face of the carrier matrix. In order to be able to retrieve the SCR catalyst from the sleeve, a retrieval structure is provided on the easily accessible inner surface of the overhang.

Description

technical field [0001] The present invention relates generally to exhaust aftertreatment systems for reducing emissions from power systems such as large internal combustion engines, and more particularly to a system in which individual catalysts or aftertreatment blocks may be removed from time to time and Repaired system. Background technique [0002] Power systems, especially internal combustion engines such as diesel engines, gasoline engines and natural gas turbines, generate a number of by-products and emissions during operation, including such as NO and NO 2 and other nitrogen oxide emissions, sometimes with NO x express. In response to increasing government mandates on these emissions, internal combustion engine manufacturers have investigated various measures to reduce the amount and impact of nitrogen oxides produced by the internal combustion process. One method is a chemical process known as Selective Catalytic Reduction, which may be referred to as SCR. Durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/18F01N3/24
CPCF01N13/18F01N3/035F01N3/103F01N2450/00F01N2450/18F01N2450/30F01N3/2842F01N2470/14F01N2470/16F01N2470/22F01N13/017F01N13/0097Y10T29/49233Y10T29/49721F01N3/2066Y02T10/12B01D53/9431F01N13/1838
Inventor M·P·贝格T·W·曼宁R·E·杰夫斯K·N·恩格森A·M·丹尼斯P·V·拉奥
Owner CATERPILLAR INC