Abstract:
Method and system for removal of soot, ash and heavy metals, and optionally additionally NOx and SOx being present in exhaust gas from an engine operated on heavy fuel oil.
Abstract:
The present invention relates to a "dry" particulate filtering apparatus for diesel engines, in particular for marine diesel engines, as well as a method of operation and regeneration of said apparatus. The apparatus according to the present invention is characterised in that it comprises a plurality of independent compartments which are arranged in parallel with respect to the flow of the exhaust gases to be treated, and in that it comprises, on each of said compartments, shut-off means that allow a single compartment to be excluded from the filtering during the regeneration operations of the filtering means, which primarily takes place by means of a countercurrent pulse of compressed air flowing into the filtering means.
Abstract:
An exhaust after-treatment system includes a first set of exhaust after-treatment components, a second set of exhaust after-treatment components, an inlet to the exhaust after-treatment system, an outlet from the exhaust after-treatment system, and a valve and conduit arrangement configurable in a plurality of modes, in a first mode, exhaust gas entering the inlet flows through the second set of exhaust after-treatment components, then through the first set of exhaust after-treatment components, and then through the outlet. In a second mode, exhaust gas entering the inlet flows through the second set of exhaust after-treatment components without flowing through the first set of exhaust after-treatment components, and then through the outlet in a third mode, exhaust gas entering the inlet flows through the first set of exhaust after-treatment components, then through the second set of exhaust after-treatment components, and then through the outlet.
Abstract:
Methods of monitoring replacement of a diesel particulate filter (DPF) by a non-particulate matter filter. The disclosed methods takes into account a change in delta pressure based soot load estimates (DPSLE) over time to detect whether the DPF has been replaced. The estimate, which is measured by the delta pressure drop across the filter, can be used to determine whether a device that does not have the capability of trapping soot, such as a muffler, has been inserted.
Abstract:
L'invention concerne un procédé de nettoyage de la face amont (14) d'un filtre à particules (10) d'une ligne d'échappement d'un moteur thermique. Le procédé comporte une étape de mise en circulation d'un flux de nettoyage au travers du filtre à particules (10) de sa face aval (18) vers sa face amont (14) en considérant le sens d'écoulement des gaz d'échappement dans le filtre. Il comporte, avant ladite étape de mise en circulation d'un flux de nettoyage au travers du filtre à particules (10), une étape de trempage par immersion du filtre à particules (10) dans une solution de trempage (26), en l'absence de vibrations ultrasonores.
Abstract:
The invention relates to a flow switch comprising a feed channel (1), a Coanda tulip (5), at least two outlets (11 and 12) and a displacement body (6) which is arranged in the area of the Coanda tulip (5) and is provided with a flow surface (7) and a casing (8). The position of the flow surface (7) can be changed in the direction of flow.
Abstract:
A muffler-filter apparatus (36) having a particulate trap using filter tubes (38) with high temperature filter materials, like fiber in the form of yarn, woven yarn mat, or a non-woven, random array fiber mat, or various foams. Filter tubes (38) have various structural configurations and are regenerated by axial propagation using ring heaters or stub rod heaters, by heating the entire length of the filter tube (38) with a rod heater or some other full-length heater configuration. For regeneration, exhaust flow is bypassed using various valve configurations including a poppet valve (128), a shutter valve, or a tubular valve. Filter tube (38) filters may also be self-regenerated by the heat from the exhaust gases as controlled by a throttle valve or on inclusion of fuel additives which lower particulate ignition temperature.
Abstract:
Un procédé de régénération d'un FaP (4a,4b) d'une ligne d'échappement d'un moteur diesel, destiné à éliminer pendant le fonctionnement du dit moteur au moins une partie des particules de suies fixées dans le dit FaP, comprend les étapes suivantes : -production d'ozone dans un flux d'air par un dispositif ozoneur (14), -injection du dît flux d'air chargé en ozone dans la ligne d'échappement en un point d'injection (5a,5b) situé en aval du moteur et en amont du FaP, -dérivation du flux des gaz d'échappement à partir d'un point de dérivation (2) de Ia ligne d'échappement situé en amont du dit point d'injection (5a,5b), et poursuite de l'injection d'ozone dans le dit FaP pour réaliser la dite régénération. Le procédé est utilisé en particulier dans une ligne d'échappement comprenant deux FaPs (4a,4b) montés en parallèle, un système de by-pass (2) permettant de distribuer Ie flux des gaz d'échappement entre tes deux FaPs, un ozoneur (14), un système de vanne (7) permettant de distribuer l'ozone sortant de l'ozoneur (14) entre deux points d'injection (5a,5b) agencés en parallèle respectivement en amont du premier et du deuxième FaP et en aval du dit by-pass (2).
Abstract:
An exhaust gas purification apparatus, for an engine having a combustion chamber, comprising an exhaust passage, a particulate filter arranged in the exhaust passage for removing particulate in exhaust gas exhausted from the combustion chamber by oxidation, and a device for controlling the characteristics of the exhaust gas flowing into the particulate filter, wherein, when the judging means judges that the particulate filter will be deteriorated by heat, the controlling device changes the characteristics of the exhaust gas flowing into the particulate filter to prevent the particulate filter from being deteriorated by heat.
Abstract:
A device for reforming an exhaust gas filter in a shorter time includes casings, in each of which are arranged a plurality of first temperature detectors (26a, 26b) for detecting the temperature in the casing and a plurality of second temperature detectors (26a, 26b) for detecting the temperature of exhaust gas. A processor (30) is connected to the first temperature detectors and the second temperature detectors to compare the temperature in the casing with the temperature of exhaust gas. Depending on the results of comparison, particular switch valves are opened and at least one of the filters is preheated by exhaust gas. The initial temperature of the filter thus rises abruptly to reduce the time required to reform the filter.