US 4,225,327 AGranted

Filter for purification of gases

AssigneeLufttechnik Bayreuth Ruskamp GmbH

InventorsFriedrich Sgaslik, Detlef Nalaskowski

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Abstract

The present invention relates to a filter apparatus for the purifying of gases, having at least one filter space which has at least one upper inlet and one lower inlet for a filter medium containing solid particles which passes through said space, the gas to be purified flowing through said space in countercurrent to the filter medium. In this filter apparatus, at least one removing device which moves relative to the filter space, for instance a scraper, is provided at the outlet for the filter medium, said device moving through a cone of the filter medium which forms at the outlet so as to remove, in each case, at least a part of the filter medium from the cone.

Claims17

Dependent claims

Apparatus for the purification of gases comprising:

(a) a plurality of annular filter chambers concentrically arranged with respect to a common vertical axis one above the other, said filter chambers each having outer annular wall means, inner annular wall means and bottom wall means defining said filter chambers, and each containing a filter medium;
(b) an inner gas chamber surrounded by said filter chambers, and an outer gas collection chamber surrounding said filter chambers with the inner wall means and the outer wall means of each filter chamber separating each filter chamber from said inner and outer gas chambers, respectively;
(c) a storage chamber for storing fresh filter medium, a filter medium inlet means at the top of each filter chamber, channel means for establishing direct communication between said storage chamber and each filter medium inlet means for downward flow of fresh filter medium directly into each said filter chamber from said storage chamber, and an annular opening at the lower part of each inner wall means defining a spent filter medium outlet for the downward flow of spent filter medium out of each filter chamber;
(d) said annular opening being in communication with said inner gas chamber and each filter chamber having an upper gas outlet in communication with said outer gas chamber to provide a path of flow of gas from said inner chamber through each filter chamber via said annular opening and thence to said outer chamber via said upper gas outlet substantially countercurrent to the flow of filter medium;
(e) a horizontally disposed annular wall means adjacent and below each annular opening and extending from said bottom wall means of each filter chamber into the interior of said inner gas chamber, the upper surface of said annular wall means being adapted to support thereon a deposit of spent filter medium discharged from each filter chamber via said annular opening;
(f) a rotatable shaft within said inner gas chamber, means for rotating said shaft, a plurality of scrapers mounted on said shaft, at least one of said scrapers being located at each annular opening and above said upper surface, and a plurality of collection pockets mounted on said shaft, at least one of said pockets being located below each said annular wall means, said scrapers being operable, when said shaft is rotated, to move across said upper surface of said annular wall means and thereby push said spent filter medium deposited thereon off said annular wall means and into said pockets;
and
(g) stack means mounted on said shaft, each collection pocket communicating with said stack means so as to discharge spent filter medium into said stack means, and a collection chamber separated from said inner gas chamber by a wall means, the lower end of said stack means communicating with said collection chambers so as to discharge spent filter medium passing therethrough into said collection chamber.

5 more elements

Apparatus for the purification of gases, comprising:

(a) a plurality of annular filter chambers concentrically arranged with respect to a common vertical axis one above the other, said filter chambers each having outer annular wall means, inner annular wall means and bottom wall means defining said filter chambers, and each containing a filter medium;
(b) an inner gas chamber surrounded by said filter chambers, and an outer gas collection chamber surrounding said filter chambers with the inner wall means and the outer wall means of each filter chambers separating each filter chamber from said inner and outer gas chambers, respectively;
(c) a storage chamber for storing fresh filter medium, a filter medium inlet means at the top of each filter chamber, channel means for establishing direct communication between said storage chamber and each filter medium inlet means for downward flow of fresh filter medium directly into each said filter chamber from said storage chamber, and an annular opening at the lower part of each inner wall means defining a spent filter medium outlet for the downward flow of spent filter medium out of each filter chamber;
(d) said annular opening being in communication with said inner gas chamber and each filter chamber having an upper gas outlet in communication with said outer gas chamber to provide a path of flow of gas from said inner chamber through each filter chamber via said annular opening and thence to said outer chamber via said upper gas outlet substantially countercurrent to the flow of filter medium;
(e) a horizontally disposed annular wall means adjacent and below each annular opening and extending from said bottom wall means of each filter chamber into the interior of said inner gas chamber, and divider wall means angularly disposed in each said annular opening so as to define an upper surface, the upper surface of said annular wall means and of said divider wall means each being adapted to support thereon a deposit of spent filter medium, said divider wall means dividing each annular opening into two superimposed annular openings, the lower annular opening being the outlet opening for spent filter medium as well as an inlet for the gas to be purified, the upper opening being only an inlet for the gas to be purified;
(f) a rotatable shaft within said inner gas chamber, means for rotating said shaft, a plurality of scrapers mounted on said shaft, at least one of said scrapers being located at each lower annular opening and above said upper surface of said annular wall means, and a plurality of collection pockets mounted on said shaft, at least one of said pockets being located below each said annular wall means, said scrapers being operable, when said shaft is rotated, to move across said upper surface of said annular wall means and thereby push said spent filter medium deposited thereon off said annular wall means and into said pockets;
and
(g) stack means mounted on said shaft, each collection pocket communicating with said stack means so as to discharge spent filter medium into said stack means, and a collection chamber separated from said inner gas chamber by a wall means, the lower end of said stack means communicating with said collection chamber so as to discharge spent filter medium passing therethrough into said collection chamber.

5 more elements

Apparatus for the purification of gases comprising:

(a) a plurality of annular filter chambers concentrically arranged with respect to a common vertical axis one above the other, said filter chambers each having inner and outer annular wall means and each containing a filter medium;
(b) an inner gas chamber surrounded by said filter chambers, and an outer gas collection chamber surrounding said filter chambers;
(c) a storage chamber for storing fresh filter medium, a filter medium inlet means at the top of each filter chamber, channel means for establishing direct communication between said storage chamber and each filter medium inlet means for downward flow of fresh filter medium directly into each said filter chamber from said storage chamber, and an annular opening at the lower part of each inner wall means defining a spent filter medium outlet for the downward flow of spent filter medium out of each filter chamber;
(d) said annular opening being in communication with said inner gas chamber, and each filter chamber having an upper gas outlet in communication with said outer gas chamber to provide a path of flow of gas from said inner chamber through each filter chamber via said annular opening and thence to said outer chamber via said upper gas outlet substantially countercurrent to the flow of filter medium;
(e) a horizontally disposed annular wall means adjacent and below each annular opening and extending into the interior of said inner gas chamber, the upper surface of said annular wall means being adapted to support thereon a deposit of spent filter medium discharged from each filter chamber via said annular opening;
(f) a rotatable shaft within said inner gas chamber, means for rotating said shaft, a plurality of scrapers mounted on said shaft, at least one of said scrapers being located at each annular opening and above said upper surface, and a plurality of collection pockets mounted on said shaft, at least one of said pockets being located below each said annular wall means, said scrapers being operable, when said shaft is rotated, to move across said upper surface of said annular wall means and thereby push said spent filter medium deposited thereon off said annular wall means and into said pockets;
and
(g) stack means mounted on said shaft, each collection pocket communicating with said stack means so as to discharge spent filter medium into said stack means, and a collection chamber separated from said inner gas chamber by a wall means, the lower end of said stack means communicating with said collection chamber so as to discharge spent filter medium passing therethrough into said collection chamber.

5 more elements

Dependencies are inferred from the claim text.

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Abstract

Apparatus for the purification of gases comprising:

(a) a plurality of annular filter chambers concentrically arranged with respect to a common vertical axis one above the other, said filter chambers each having outer annular wall means, inner annular wall means and bottom wall means defining said filter chambers, and each containing a filter medium;
(b) an inner gas chamber surrounded by said filter chambers, and an outer gas collection chamber surrounding said filter chambers with the inner wall means and the outer wall means of each filter chamber separating each filter chamber from said inner and outer gas chambers, respectively;
(c) a storage chamber for storing fresh filter medium, a filter medium inlet means at the top of each filter chamber, channel means for establishing direct communication between said storage chamber and each filter medium inlet means for downward flow of fresh filter medium directly into each said filter chamber from said storage chamber, and an annular opening at the lower part of each inner wall means defining a spent filter medium outlet for the downward flow of spent filter medium out of each filter chamber;
(d) said annular opening being in communication with said inner gas chamber and each filter chamber having an upper gas outlet in communication with said outer gas chamber to provide a path of flow of gas from said inner chamber through each filter chamber via said annular opening and thence to said outer chamber via said upper gas outlet substantially countercurrent to the flow of filter medium;
(e) a horizontally disposed annular wall means adjacent and below each annular opening and extending from said bottom wall means of each filter chamber into the interior of said inner gas chamber, the upper surface of said annular wall means being adapted to support thereon a deposit of spent filter medium discharged from each filter chamber via said annular opening;
(f) a rotatable shaft within said inner gas chamber, means for rotating said shaft, a plurality of scrapers mounted on said shaft, at least one of said scrapers being located at each annular opening and above said upper surface, and a plurality of collection pockets mounted on said shaft, at least one of said pockets being located below each said annular wall means, said scrapers being operable, when said shaft is rotated, to move across said upper surface of said annular wall means and thereby push said spent filter medium deposited thereon off said annular wall means and into said pockets;
and
(g) stack means mounted on said shaft, each collection pocket communicating with said stack means so as to discharge spent filter medium into said stack means, and a collection chamber separated from said inner gas chamber by a wall means, the lower end of said stack means communicating with said collection chambers so as to discharge spent filter medium passing therethrough into said collection chamber.

5 more elements