Catalyst thermal regeneration by exhaust gas

Patent metadata

Field	Value
Publication number	US-10247078-B2
Application number	US-201515502727-A
Country	US
Kind code	B2
Filing date	Jul 24, 2015
Priority date	Aug 28, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Method and system for thermal regeneration of a catalyst by inlet turbine exhaust gas from a diesel engine, where a gas split stream ( 08 ) is led from the engine exhaust ( 02 ) through an eductor ( 04 ) and further to regeneration of a catalyst, wherein a cold air stream ( 09 ) is used to keep the regeneration gas stream at a desired constant temperature range.

First claim

The invention claimed is:

1. System for thermal regeneration of a catalyzed soot filter in an engine exhaust gas cleaning unit comprising:
one or more exhaust gas pipes connected to a turbine of a turbocharger;
an eductor comprising a motive inlet, a suction inlet and an outlet;
one or more exhaust gas split stream pipes connecting the one or more exhaust gas pipes upstream of the turbine of the turbocharger with the motive inlet of the eductor;
an air pipe connected to the suction inlet of the eductor;
a flow regulation valve mounted in the air pipe; and
an eductor outlet pipe connected to the educator outlet.

2. System for thermal regeneration of a catalyzed soot filter in an engine exhaust gas cleaning unit according to claim 1 , wherein the engine is marine diesel engine.

3. System for thermal regeneration of a catalyzed soot filter in an engine exhaust gas cleaning unit according to claim 1 , further comprising regulating valve arranged in the one or more exhaust gas split stream pipes adapted to open, shut or regulate the exhaust gas flow to the motive inlet of the eductor.

4. System for thermal regeneration of a catalyzed soot filter in an engine exhaust gas cleaning unit according to claim 1 , wherein the exhaust gas from the engine has a temperature of 400° C.-520° C.

5. System for thermal regeneration of a catalyzed soot filter in an engine exhaust gas cleaning unit according to claim 1 , wherein the exhaust gas from the engine has a pressure of 1-2.5 barg.

Assignees

• Haldor Topsoe As
• Ecospray Tech Srl

Inventors

• Archetti Maurizio

Classifications

• F01N3/035 Primary

  with catalytic reactors · CPC title

• F01N2590/02

  for marine vessels or naval applications · CPC title

• F01N3/34 Primary

  using air conduits or jet air pumps, e.g. near the engine exhaust port · CPC title

• F01N3/22 Primary

  Control of additional air supply only, e.g. using by-passes or variable air pump drives · CPC title

• F01N2470/30

  Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow · CPC title