摘要:
An arrangement for removal of particulates in a gas flow includes at least one gas passage that is at least partly surrounded by a porous material. An arrangement for exposing the gas passage to sound that induces gas movements in a direction towards the porous material is provided. A method for removal of particulates in a gas flow is also provided.
摘要:
A catalyst unit (1; 1′) configured for the reduction of NOx compounds in a gas stream and which includes a catalytically active material of the silver/alumina type. The catalyst unit (1; 1′) has at least one first reaction zone (3a, 3b, 3c, 3d, 3e) containing the catalytically active material and at least one second reaction zone (4a, 4b, 4c, 4d, 4e; 8a, 8b, 8c, 8d, 8e) which is arranged to permit breakdown of a gas species which is formed in the first reaction zone (3a, 3b, 3c, 3d, 3e), with N2 being formed, and in that the gas stream is conducted through the first reaction zone (3a, 3b, 3c, 3d, 3e) and the second reaction zone (4a, 4b, 4c, 4d, 4e; 8a, 8b, 8c, 8d, 8e). The invention results in an improved catalyst unit which in particular provides high-grade reduction of NOx compounds in an exhaust gas stream from a combustion engine.
摘要翻译:一种催化剂单元(1; 1'),其被配置用于在气流中还原NO x X 3化合物,并且其包括银/氧化铝型催化活性材料。 催化剂单元(1; 1')具有至少一个含有催化活性材料和至少一个第二反应区(4a,4b)的第一反应区(3a,3b,3c,3c, ,4c,4d,4e; 8a,8b,8c,8d,8e),其被布置成允许在第一反应区(3a,3b, 3 c,3 d,3 e),形成N 2,并且气流通过第一反应区(3a,3b,3c,3c, e)和第二反应区(4a,4b,4c,4d,4e; 8a,8b,8c,8d,8e)。 本发明导致改进的催化剂单元,其特别地提供了来自内燃发动机的排气流中高级还原NO x化合物。
摘要:
Device (1) for the recovery of thermal energy from a first gas flow (11) from an internal combustion engine (10), the device being designed for the transfer of thermal energy from the first gas flow (11) to a second gas flow (12). The device includes a body (2) having a zigzag-shaped structure, which forms ducts for said gas flows, and the body (2) is designed for the transfer of heat between the first gas flow (11) and the second gas flow (12).
摘要:
Device for treatment of a gas flow having at least one body (3) that is adapted to cause a conversion in the composition of the gas. The device is characterized in that the body (3) has a modular construction comprising a plurality of sections (26, 26′, 27, 27′, 36) with different internal structures that allow gas to flow through the section, and that the sections (26, 26′, 27, 27′, 36) are arranged so that at least a portion of the gas flows through at least two sections with different internal structures during operation of the device.
摘要:
Method and apparatus for treating a gas flow including guiding the gas flow through a gas treatment unit (18) adapted for filtering particles in the gas flow, and eliminating the particles in the gas treatment unit (18). Particles are filtered from the gas flow by means of accumulating the particles in, or in connection with, a number of ducts (21) forming part of the gas treatment unit (21) during passage of the gas flow through the gas treatment unit (18). The temperature of the gas flow is controlled along the ducts (21) to a value that provides combustion of the particles, and eliminates the filtered particles in the gas treatment unit (18) by means of combustion in the ducts (21). An improved treatment of a gas flow is provided, in particular in connection with exhaust gas purification in a diesel engine, for eliminating particles in its exhaust gases.
摘要:
An internal combustion engine exhaust gas system includes an EGR arrangement adapted to lead a first flow of exhaust gas, the EGR flow, from an outlet side of the engine to an inlet side of the engine, an exhaust gas conduit adapted to lead away a second flow of exhaust gas, the exhaust flow, from the outlet side of the engine, and an energy recovering unit, such as a turbo, associated with the exhaust gas conduit. The unit is adapted to recover exhaust gas energy from the exhaust flow. The system includes a heat exchanger adapted to allow heat exchange between at least a part of the EGR flow and at least a part of the exhaust flow, the heat exchanger being associated with the exhaust gas conduit at a position downstream the energy recovering unit.
摘要:
A method and arrangement for control of a combustion engine (11) having control elements (4, 5, 17) for generation of an air/fuel mixture to each cylinder (3) of the engine (1), an exhaust system (7, 8) which is connected to the engine (1), an exhaust catalyst (10) and a NOx absorbent (11) which are provided in the exhaust system (7, 8), which method comprises: control of the control elements (4, 5, 17) in a first operating condition for generation of a comparatively lean exhaust gas mixture to the NOx adsorbent (11) for adsorption of NOx compounds in the exhaust gas mixture, and control of the control elements (4, 5, 17) in a second operating condition for generation of a comparatively rich exhaust gas mixture to the NOx absorbent (11) for desorption of NOx compounds in the exhaust gas mixture. The invention is characterized in that it comprises: detection of whether at least one condition in the vehicle prevails which corresponds to an initiation of a change-over from the first operating condition to the second operating condition, wherein all adjustment of the air/fuel mixture to the engine (1) is carried out, wherein the generation of a rich exhaust gas mixture is initiated for desorption of NOx compounds in the NOx adsorbent (11) depending on the conditions.
摘要:
An arrangement for removal of particulates in a gas flow includes at least one gas passage that is at least partly surrounded by a porous material. An arrangement for exposing the gas passage to sound that induces gas movements in a direction towards the porous material is provided. A method for removal of particulates in a gas flow is also provided.
摘要:
A particulate filtration device includes a filter with a feed inlet side for a feed gas and an filtrate outlet for a filtrate, feed gas channels and filtrate channels, and one or more diaphragms between the feed inlet side and the filtrate outlet. Opposite to the feed inlet side a particulate outlet is arranged with a collector compartment attached to the particulate outlet for collecting particulates retained in the feed gas channels.
摘要:
Method and apparatus for establishing a fuel cell unit (10) in the form of an extruded monolith having channels (14), of which every second constitutes a fuel channel (14a) and every other second an oxygen channel (14b). The channels (14) are designed in such a manner that the fuel channels (14a) are displaced laterally in relation to the oxygen channels (14b), in such a way that all the fuel channels (14a) protrude a certain distance from the end points of all the oxygen channels 14b) and all the oxygen channels (14b) protrude a certain distance from the end points of all the fuel channels (14a). The distance is less than the length of respective channels. The invention also relates to a fuel cell device that includes several of the fuel cell units (10) that together establish an enhanced system of fuel cell units that lend themselves to compact.