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The invention relates to a filter element. A base carrier is configured as a folded plate, wherein first passage openings are arranged proximate first folding edges and first connection elements are arranged proximate second folding edges. Attachments are configured as strips foldable in a longitudi

The invention relates to a filter element. A base carrier is configured as a folded plate, wherein first passage openings are arranged proximate first folding edges and first connection elements are arranged proximate second folding edges. Attachments are configured as strips foldable in a longitudinal direction along a fold line with second passage openings and a first and a second longitudinal edge. Second connection elements proximate the first and the second longitudinal edge of each attachment are connected with the first connection elements of two adjacent second folding edges, and the second connection elements of the first longitudinal edge of one of the attachments and the second connection elements of the second longitudinal edge of an adjacent attachment are connected with the first connection elements of one of the second folding edges.

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1. A filter element for separating particles from a particle-laden crude gas stream, comprising: at least one base carrier, configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding

1. A filter element for separating particles from a particle-laden crude gas stream, comprising: at least one base carrier, configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate the second folding edges; anda plurality of attachments, wherein each of the attachments is configured as a separate strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein each attachment comprises second connection elements proximate the first and the second longitudinal edge;wherein the attachments are respectively folded along their fold line and arranged on the base carrier wherein the second connection elements of the first and the second longitudinal edges of each attachment are connected with the first connection elements of two adjacent second folding edges, and the second connection elements of the first longitudinal edge of one of the attachments and the second connection elements of the second longitudinal edge of an adjacent attachment are connected with the first connection elements of one of the second folding edges of the base carrier. 2. The filter element in accordance with claim 1, wherein the base carrier is designed as an injection molded part and wherein the attachments are designed as extruded parts. 3. The filter element in accordance with claim 1, wherein the base carrier and the attachments are comprised of plastic. 4. The filter element in accordance with claim 1, wherein the at least one base carrier comprises two opposing longitudinal edges extending parallel to the folding edges, wherein both longitudinal edges respectively form sections of second folding edges. 5. The filter element in accordance with claim 4, wherein the sections of the second folding edge of the first longitudinal edge and the sections of the second folding edge of the second longitudinal edge are free of overlaps in the direction of the folding edges. 6. The filter element in accordance with claim 4, wherein the sections of one longitudinal edge of a first base carrier form a shared second folding edge with the sections of the other longitudinal edge of a second, adjacent base carrier. 7. The filter element in accordance with claim 1, wherein the second passage openings are arranged between the respective first longitudinal edge and the respective fold line of the attachments. 8. The filter element in accordance with claim 1, wherein the second passage openings are arranged between the respective second longitudinal edge and the respective fold line of the attachments. 9. A filter element for separating particles from a particle-laden crude gas stream, comprising: at least one base carrier, configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate the second folding edges; anda plurality of attachments, wherein each of the attachments is configured as a strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein each attachment comprises second connection elements proximate the first and the second longitudinal edge;wherein the attachments are respectively folded along their fold line and arranged on the base carrier wherein the second connection elements of the first and the second longitudinal edges of each attachment are connected with the first connection elements of two adjacent second folding edges, and the second connection elements of the first longitudinal edge of one of the attachments and the second connection elements of the second longitudinal edge of an adjacent attachment are connected with the first connection elements of one of the second folding edges of the base carrier, and wherein the attachments have a longitudinal extension corresponding to a multiple of an extension of the at least one base carrier in the direction of its first and second folding edges. 10. The filter element of claim 9, wherein the multiple is an integer. 11. A filter element for separating particles from a particle-laden crude gas stream, comprising: at least one base carrier, configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate the second folding edges; anda plurality of attachments, wherein each of the attachments is configured as a strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein each attachment comprises second connection elements proximate the first and the second longitudinal edge;wherein the attachments are respectively folded along their fold line and arranged on the base carrier wherein the second connection elements of the first and the second longitudinal edges of each attachment are connected with the first connection elements of two adjacent second folding edges, and the second connection elements of the first longitudinal edge of one of the attachments and the second connection elements of the second longitudinal edge of an adjacent attachment are connected with the first connection elements of one of the second folding edges of the base carrier, and wherein the connection between the first and the second connection elements is configured as a detachable connection. 12. A filter element for separating particles from a particle-laden crude gas stream, comprising: at least one base carrier, configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate the second folding edges; anda plurality of attachments, wherein each of the attachments is configured as a strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein each attachment comprises second connection elements proximate the first and the second longitudinal edge;wherein the attachments are respectively folded along their fold line and arranged on the base carrier wherein the second connection elements of the first and the second longitudinal edges of each attachment are connected with the first connection elements of two adjacent second folding edges, and the second connection elements of the first longitudinal edge of one of the attachments and the second connection elements of the second longitudinal edge of an adjacent attachment are connected with the first connection elements of one of the second folding edges of the base carrier, andwherein the first connection elements are configured as connection element pairs, wherein respectively one pair of first connection elements is arranged in a slightly offset manner, opposite to each other, in the area of one of the second folding edges; andthe second connection elements are configured as connection element pairs, wherein respectively one pair of second connection elements of the first and the second longitudinal edges is arranged in a slightly offset manner, opposite to each other. 13. The filter element in accordance with claim 12, wherein the one pair of first connection elements and the one pair of second connection elements of the first and second longitudinal edges are arranged along the extension direction of the second folding edges and longitudinal edges, respectively. 14. A base carrier for a filter element for separating particles from a particle-laden crude gas stream, wherein the base carrier is configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate the second folding edges, and a plurality of discrete attachments each configured as a strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein each of the attachments comprise second connection elements proximate the first and the second longitudinal edge. 15. A method for assembling a filter element for separating particles from a particle-laden crude gas stream, the method comprising the steps of: providing at least one base carrier, configured as a folded plate with several first folding edges and several second folding edges, wherein the several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate of the second folding edges;providing a plurality of attachments, wherein each of the attachments is configured as a separate strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein each attachment comprises second connection elements proximate the first and the second longitudinal edge;folding the attachments, respectively along their fold lines; andarranging the attachments on the base carrier in such a way that the second connection elements of the first and the second longitudinal edges of each attachment are connected with the first connection elements of two adjacent second folding edges, and the second connection elements of the first longitudinal edge of one of the attachments and the second connection elements of the second longitudinal edge of an adjacent attachment are connected with the first connection elements of one of the second folding edges of the base carrier. 16. A method for producing a base carrier and an attachment for a filter element for separating particles from a particle-laden crude gas stream, the method comprising: injection molding a base carrier configured as a folded plate with several first folding edges and several second folding edges, wherein several first passage openings are arranged proximate the first folding edges and several first connection elements are arranged proximate the second folding edges; andextruding a plurality of attachments, wherein the attachments are each configured as a separate strip foldable in a longitudinal direction along a fold line with several second passage openings and a first and a second longitudinal edge, and wherein the attachments comprise second connection elements proximate the first and the second longitudinal edge. 17. The method in accordance with claim 16, wherein the fold line extends in the extrusion direction. 18. The method in accordance with claim 16, wherein the fold line extends transversely to the extrusion direction. 19. The method in accordance with claim 16, wherein a formability of the fold line of the attachment is achieved through a section-by-section reduction of the wall thickness by means of a chipless forming process.