Apparatus for removing dust from gas and for cleaning at least one filter of the apparatus

An apparatus for removing dust from gas, having a container bounding a crude gas space, at least one filter projecting into the crude gas space and gas conduction means for passing the gas from the crude gas space through the at least one filter, the at least one filter having a casing with a metallic support member and a metallic filtration member enclosing said support member and supported by said support member, the support member having an inner wire fabric and an outer wire fabric, the filtration member comprising a wire fabric having an inner surface and an outer surface, said outer surface being directly adjacent to the crude gas space, each of said wire fabrics having wires defining gas passages with internal widths, the wires of the outer wire fabric being thinner than the wires of said inner wire fabric, and the wires of the filtration member being thinner than the wires of the outer wire fabric of the support member, the internal widths of said outer wire fabric of the support member being smaller than the internal widths of said inner wire fabric, and the internal widths of the filtration member being smaller than the internal widths of the outer wire fabric of the support member, wherein the adjacent wire fabrics rest on one another and wherein the wires belonging to the same wire fabric and also the wires belonging to different wire fabrics are sintered with one another at points of contact.

An apparatus for removing dust from gas, having a container, an inner wall, a plurality of filters, and at least one wet cleaning device, the container bounding a container interior, the inner wall dividing said container interior into a crude gas space and a clean gas space, wherein each filter is fastened to the inner wall and projects into the crude gas space, each filter having a casing that bounds a filter interior which is connected by a passage to the clean gas space, wherein the casing has a metallic support member and a metallic filtration member enclosing said support member and supported by said support member, the support member having at least one wire fabric defining gas passages, the filtration member comprising a wire fabric having an inner surface, an outer surface immediately adjacent to the crude gas space, and gas passages, the gas passages of the filtration member having smaller internal widths than the gas passages of the support member, wherein the filtration member rests essentially with the entire inner surface thereof against the support member and is supported by the support member in a dimensionally stable manner, wherein the apparatus further include gas conduction means for passing gas from the crude gas space through the filters into the clean gas space, wherein a cleaning gas inlet and a closure device are associated with each filter for passing cleaning gas into the filter interior and for closing said passage during the passing of cleaning gas into the filter interior, at least one wet cleaning device having a housing projecting from said inner wall into the clean gas space and a spray member displaceable from a rest position into a cleaning position and wherein the spray member is essentially inside the housing in the rest position and projects into the crude gas space in the cleaning position for spraying a cleaning liquid against the outer surface of the filtration member of at least one of the filters.

An apparatus for removing dust from gas, having a container bounding an interior and an inner wall part dividing said interior into a crude gas space and a clean gas space, wherein at least one filter is detachably fastened to said inner wall part, projects therefrom downwards into the crude gas space, and bounds a filter interior which is connected by a connection passage to the clean gas space, further comprising gas conduction members for passing gas from the crude gas space through at least one filter, said at least one filter having a casing with a metallic support member and a metallic filtration member enclosing said support member and supported by said support member, the support member having at least one wire fabric limiting gas passages, the filtration member comprising a wire fabric and having an inner surface, an outer surface immediately adjacent to the crude gas space and gas passages, and the gas passages of the filtration member having smaller internal widths than the gas passages of the support member, wherein the filtration member rests essentially with the entire inner surface thereof against the support member and is supported by the support member in a dimensionally stable manner, wherein said at least one filter has a ring at one end of said filter, wherein the support member and the filtration member are welded or soldered at one end, along the entire circumference of the support member and the filtration member, to the ring, wherein the ring is adjacent to the wall part and is removable therefrom, wherein the support member and the filtration member are welded or soldered at lower ends of said support member and filtration member end facing away from the inner wall part, along the entire circumference of the support member and the filtration member, to a disk which has an upper surface which faces the inner wall part, and is inclined outward and away from the inner wall part wherein the disk has a hole in the center and wherein the filter is detachably fastened to the inner wall part by fastening means passing through the hole i the disk, wherein the disk is welded or soldered to an end wall projecting away from the disk and from the casing and tapering away from the disk and wherein the disk and the end wall are firmly connected to one another by a sleeve which is coaxial with the hole in the disk and has an axial through-hole.

An apparatus for removing dust from gas having a container, an inner wall, a plurality of filters, the container bounding a container interior, the inner wall part dividing said container interior into a crude gas space and a clean gas space, wherein each filter is fastened to the inner wall part, projects into the crude gas space, has a casing, and bounds a filter interior which is connected by a passage to the clean gas space, wherein the casing has a metallic support member and a metallic filtration member enclosing said support member and supported by said support member, the support member having at least one wire fabric limiting gas passages, the filtration member consisting of a wire fabric and having an inner surface, an outer surface immediately adjacent to the crude gas space and gas passages, and the gas passages of the filtration member having smaller internal widths than the gas passages of the support member, wherein the filtration member rests essentially with the entire inner surface thereof against the support member and is supported by the support member in a dimensionally stable manner, wherein the filter interior is connected by a first passage to the clean gas space, the apparatus further having gas conduction means for passing the gas from the crude gas space through the filters and the first passages into the clean gas space, wherein a cleaning gas inlet and a closure device are associated with each filter for passing cleaning gas into the filter interior and for closing said first passage during the passing of cleaning gas into the filter interior, wherein each closure device has a sleeve enclosing the cleaning gas inlet in cross-section and a piston displaceable in said sleeve and connected to a closure member, wherein the sleeve is tightly sealed by an end element on that side of the piston which faces away from the filter, wherein each cleaning gas inlet is rigidly connected to the inner wall part, passes through the associated sleeve, piston, end element and closure member, encloses a second passage connected to the associated filter interior and has at least one hole which connects the second passage to an interior region enclosed by the sleeve and present between the end element and the piston and wherein the second passage has a constriction between the at least one hole and an end located on that side of the piston which faces away from the at least one hole.