DE1218857B - Top gas dedusting system with a coarse dust pre-separator after downstream cyclones - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

BOId

B 04 c
German class: 5Oe-I

Number: 1218 857

File number: M 28443ΙΠ / 50 e

Filing date: October 11, 1955

Opening day: June 8, 1966

The invention relates to a furnace gas dedusting system with a pre-separator, preferably a sedimentation shaft, cyclones arranged in a ring as post-separators, their tangential inlets are connected to the pre-separator by means of separate inflow channels and their Clean gas outlet stubs open into a clean gas collection chamber placed on the pre-separator housing.

According to the invention, the outer cyclones, and are arranged in a ring around the pre-separator each for himself, by means of one each in his inflow channel and in his clean gas outlet nozzle provided shut-off device from the pre-separator and from the clean gas collection chamber can be completely switched off.

If the dedusting system has a large number of small cyclones, mirror images can be used Formation of two adjacent cyclones whose inflow channels are combined in pairs and with a common shut-off device for each cyclone pair. Through the common shut-off device at the inlet and two separate shut-off devices In the outlet connection of such cyclone pairs, one cyclone pair is then switched off together. In the case of the pairwise mirror-image arrangement, there is also the possibility of two anyway not to unite adjacent gas outlet nozzles and with a common shut-off device to provide; in this case, two cyclones are then activated at the same time by two shut-off devices completely shut down, which can be worked on. In a system with many small cyclones, the have a higher degree of separation than large cyclones, is the short-term shutdown of each two cyclones at the same time acceptable; it means considerable savings in channels and shut-off devices, without reducing the separation capacity significantly more than in the case of shutdown one of the few large capacity cyclones.

With reference to the drawings, the two solutions according to the invention are explained in more detail in one embodiment each.

F i g. 1 shows schematically in section the known sedimentation shaft or dust bag as a pre-separator a furnace gas dedusting system with the downstream cyclones arranged in a ring,

F i g. 2 in a view along the line H-II of FIG. 1 the other solution with two mirror images of each other posed cyclones.

With 1 is the furnace gas line and with 2 the conically widening downward, centrally in the front furnace gas dedusting system with a
Coarse dust pre-separator after downstream cyclones

Applicant:

Metallgesellschaft Aktiengesellschaft,

Frankfurt / M., Reuterweg 14

Named as inventor:

Josef Schindling, Frankfurt / M.-Nied

separator 3 arranged furnace gas supply pipe. By deflecting the gases in the pre-separator 3, the coarse-grained dust falls in a known manner from bunker 4. The gases pre-cleaned in this way leave the pre-separator 3 through the channels 7, the lead to the inlets of the cyclones 9.

The pre-separator 3 is covered by a horizontal partition 6 on which the clean gas collection chamber 13 is in place. The centrifugal dust separators are arranged in a ring on the outer wall of the pre-separator 9 (outer cyclones) arranged, the tangential gas inlets 10 (FIG. 2) of which via the gas supply channels 7 or 7 'with the gate valves 8 connection to the interior of the pre-separator 3 to have. The pre-cleaned gases rising in the pre-separator flow in this way into the Cyclones 9 are cleaned here and through the tangential clean gas outlet nozzle 11 with the gate valves 12 passed into the clean gas collection chamber 13, from which they flow out through the clean gas line 5. The dust separated in the external cyclones 9 passes through the downpipes 14 into a bunker hood 18 in the lower part of the pre-separator 3 and further into the dust collection bunker 4. The through the Partition 6 and the interposition of the cyclones 9 increased gas pressure difference between the such separate gas spaces requires the sealing of the dust downpipes 14 by means of shut-off devices, for example with pendulum flaps 15 known per se.

From Fig. 2 shows the paired arrangement of two cyclones designed in mirror image to one another with a common gas supply channel T and a common dust drop pipe 14.

The bell-shaped bunker hood 18 enables mixing or, if appropriate, also separation the different grain types of dust. The downpipes 14 expediently receive cover

609 578/165

Aprons 19 to protect against wear and tear from the coarse dust falling on them.

The cyclones 9 surrounding the pre-separator 3 in the form of a ring in a known manner are provided by supporting structures 16 and 17 easily accessible directly on the outside of the pre-separator housing 3 attached and according to the invention, by .the gas gate valve 8 and 12 can be switched off individually or in pairs, so that if there is a blockage or the like Disturbances of individual, cyclones of the. . Overall operation of the dust extractor not to experience any interruption needs.

The invention can also be used in a pre-separator with a lateral or tangential top gas inlet will. In this case, instead of the partition walls, a common, for example ring-shaped one is used Clean gas collection chamber arranged around the pre-separator, into which the clean gas outlet nozzle 11 of the cyclones open and to which the clean gas discharge line 5 is then connected.

Claims (1)

Patent claims: 1. Top gas dedusting system with a coarse dust pre-separator, preferably one Sedimentation shaft, and several cyclones arranged in a ring on the outside of its housing as a post-separator, whose tangential inlets are connected to the Pre-separators are connected and their clean gas outlet nozzle in one on the pre-separator housing open onto the clean gas collecting chamber, characterized in that that each outer cyclone (9) by means of ■ each one in his inflow channel (7) and in his Clean gas outlet nozzle (11) provided shut-off element (8, 12) from the pre-separator (3) and can be completely switched off from the clean gas collection chamber (13). • -i.-2,, furnace gas dedusting system with one Grqbstaub - pre-separator, preferably a sentimentation shaft, and on the outside of it Housing in large numbers of small cyclones arranged in a ring as post-separators, their tangential Inlets are connected to the pre-separator by means of inflow channels and their Clean gas outlet nozzle into a clean gas collecting chamber that is placed on the pre-separator housing mündeiij characterized in that two adjacent KLeincyclones (9), as per se known, are formed in pairs mirror images of each other, with their tangential inlets arranged in pairs close to one another and connected to a common inflow channel (7 ') a single shut-off element (8) are connected and each pair of cyclones is a common one Has dust drop pipe (14). .3. Top gas dedusting system according to Claim 1 or 2, characterized in that the dust pipes (14) of the cyclones (9) _{are equipped in a known manner with shut-off devices 3} such as pendulum flaps (15). '__. Considered publications:
German patent specifications No. 197 215, 596 841,
448, 660,872; French Patent No. 931259;
U.S. Patent No. 1,416,995,2 085 506. 1 sheet of drawings 609 578/165 5.66 © Bundesdruckerei Berlin