摘要:
A device for aligning and/or assembling filtering elements, in particular of particulate filter, an installation for assembling a filter from filtering elements incorporating the device, and a method for aligning and/or assembling monolithic filtering elements, in particular for making a particulate filter. The device includes a back plate whereon are set the filtering elements, the back plate being for example fixed on a base plate, and walls laterally foldable upwards by a folding mechanism, such that the filtering elements are mutually maintained tightly when the walls are in an upper position.
摘要:
The invention relates to a filtration structure (11) consisting of: first and second filtration elements (15A, 15B) which comprise respectively a first face and a second face (24A, 24B), said faces being disposed opposite one another; and a connecting joint (17) which extends between the faces (24A, 24B) and connects same. The aforementioned joint (17) comprises a binder (41) and reinforcing means (43) which are embedded therein. The reinforcing means (43) comprise an open-work reinforcing member having an autonomous coherence and comprising an essentially-flat active part (45). The invention is suitable for particle filters for the exhaust gases from an internal combustion engine.
摘要:
The invention relates to an assembled structure that can be used, after deposition of a catalyst, for filtering a gas loaded with soot particles and pollutants in the gas phase in which the cement used as a coating cement and/or as a joint cement comprises, at least at the surface, a hydrophobic or oleophobic material.The invention also relates to the assembled catalytic filter obtained after impregnating with a catalytic solution of said structure and also to the process for manufacturing the filter from said structure.
摘要:
Said structure comprises first and second filtering elements (15A, 15B) respectively comprising a first and second lateral surface (24A, 24B) disposed opposite each other. A joint (17) linking said surfaces (24A, 24B) extends between the surfaces (24A, 24B). The first lateral surface (24A) comprises, in the upstream part (36A), a first region (35C) of low or zero adherence with the joint (17), said region being defined longitudinally upstream by an upstream region (33A) of high adherence with said joint (17). The upstream region (33A) of high adherence is longitudinally defined upstream by a second region (35A) of low or zero adherence with the joint (17). Application: particle filters for the exhaust gases of an engine.
摘要:
This structure (11) comprises first and second filtering elements (15A, 15B) extending essentially parallel to a longitudinal axis (X-X′) of the structure (11) between an admission region (21) of the gases into the structure (11) and an evacuation region (23) of the gases from the structure, and comprises a seal (17) for joining these elements (15A, 15B). The seal (17) comprises at least one downstream pat (43) which has a thermal mass per unit length greater than the thermal mass per unit length of an upstream part (41) of the seal (17). The invention is for use in particulate filters for the exhaust gases of a motor vehicle diesel engine.
摘要:
The invention relates to a honeycomb structure, made from a porous ceramic material, said structure being characterized in that the porous ceramic material which forms it comprises: from 50 to 95% by weight of silicon carbide SiC; from 5 to 50% by weight of at least one ceramic oxide phase, said structure additionally being characterized by a porosity greater than 10%, by a specific surface area greater than 0.5 m2/g and by a pore size distribution of at least bimodal type. The invention also relates to the process for obtaining such a structure and also to the catalytic support or filter obtained from such a structure, after deposition of a catalyst.
摘要:
The invention concerns a catalytic filter for depolluting a gas loaded with soot particles and gaseous pollutants, obtained by impregnating in a catalytic solution a filtering structure formed by an assembly of honeycomb-type monolithic elements, wherein the porosity of the cement used as coating and/or as joint and/or as plug is less than the porosity of the material constituting said element(s).
摘要:
A block, particularly for filtering particulates present in the exhaust gases of an internal combustion engine, includes a plurality of flow channels for the gases (14e,14s), each of the channels (14e,14s) being bounded by a side wall (22), a plug (15e,15s) and an opening (19e,19s) terminating outwardly. The block according to the invention is remarkable in that a first portion (34) of the side wall (22) of at least one of the channels (14p,14p″), called the “reinforced channel”, includes a reinforcement compared to the rest of the side wall (22) forming a second portion (36) of the side wall (22), the ratio (R) of the thickness of the first portion (34) to the thickness of the second portion (36), in any transverse plane of section (P), being between 1.1 and 3.
摘要:
The invention relates to a honeycomb structure, made from a porous ceramic material, said structure being characterized in that the porous ceramic material which forms it comprises: from 50 to 95% by weight of silicon carbide SiC; from 5 to 50% by weight of at least one ceramic oxide phase, said structure additionally being characterized by a porosity greater than 10%, by a specific surface area greater than 0.5 m2/g and by a pore size distribution of at least bimodal type. The invention also relates to the process for obtaining such a structure and also to the catalytic support or filter obtained from such a structure, after deposition of a catalyst.
摘要:
A nondestructive method for detecting internal defects of a filter, for example a catalytic filter, and a device for implementing the method. The method may be used in particular for treating a gas laden with soot particulates. The filter includes a honeycomb filter element or a plurality of honeycomb filter elements. In the method the presence or absence of the defects is determined by measuring a propagation of a gas stream such as air through the filter element or elements.