EXHAUST GAS APPARATUS AND METHOD FOR THE REGENERATION OF A NOX TRAP AND A PARTICLE FILTER

摘要

Exhaust gas apparatus for the cleaning of exhaust gas where the exhaust gas apparatus comprises an exhaust conduit section which is formed with at least two separate flow paths. Each flow path is provided with a particle filter for the removal of particulate matter from the exhaust gas, an NOx trap for the removal of NOx from the exhaust gas. The exhaust gas apparatus further comprises at least one cold flame vaporizer in which fuel is partially oxidized in preheated air to form a cold flame gas where the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap, and valve means for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section. Thereby, both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation. There is also provided a method for regenerating cleaning means for exhaust gas where the cleaning means comprises an NOx trap and possibly a particle filter.

主权项

1. Exhaust gas apparatus for the cleaning of exhaust gas, the exhaust gas apparatus comprising an exhaust conduit section which is formed with at least two separate flow paths, each flow path being provided with
a particle filter for the removal of particulate matter from the exhaust gas, an NOx trap for the removal of NOx from the exhaust gas,wherein the exhaust gas apparatus further comprises
at least one cold flame vaporizer in which fuel is partially oxidized in preheated air by a cold flame such that 2-20% of the calorific value of the fuel is released,whereby a cold flame gas is formed,
the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap, and one or more valves for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section, whereby both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation.