DE1085502B - Device for warming up dust-shaped goods, in particular raw cement meal - Google Patents

Description

Device for warming up powdery goods, in particular cement raw meal The invention relates to a device for warming up powdery goods, in particular raw cement meal, in cyclones connected in series.

It is already known to dry materials in a device, in which the material to be dried through several impact separators connected in series is conducted, with a cyclone being arranged at the end of the impact separator column, in which the treated material and the air are separated from each other. There are also known as current dryers. With these electric dryers that will material to be treated in an air stream of a number of cyclones connected in parallel fed. The cyclones are on the same feed line and have a common one Discharge, which can be designed as a dust screw conveyor. With this electric dryer the goods only pass through a cyclone.

For separating solid and liquid components from steam or Centrifugal separators connected in series have also been used for gases were, so that there is a meandering path for the air flow or gas flow, where there are trapping chambers at the turning points of this path. The one to be deposited So the entire system does not run well; another turning point caught in the corresponding trap chamber.

A device is already known in which a plurality of cyclones are arranged in two rows one above the other. The cyclones arranged one above the other one row is offset in height from the one above the other Secondary row cyclones. In this known arrangement, this runs in principle to Heating-up gas in countercurrent to the material to be heated through one after the other the cyclones through. Such an arrangement is extremely tall, even if the cyclones of the two rows, as mentioned, are offset from one another in height lie. In addition, a separate conveyor unit must be available, which the Raw meal initially leads to the top cyclone.

In contrast, the invention is based on the object of the arrangement Significant savings in height from several cyclones, d. H. if possible just get the height of a cyclone. This also has the advantage of that the goods to be heated are not promoted particularly high from the outset got to.

While in the known design the gas in the cyclones after The subject of the invention uses cyclones, in which the gas and the material enter the top as tangentially as possible and furthermore Gas and material exit again in the lower part of the cyclone.

According to the invention, the cyclones - seen in plan - in two rows arranged offset to one another, the gas and the dusty material - likewise seen in plan - go through a meandering path in the countercurrent principle.

In this way one obtains a distribution which in height only corresponds to the The size of a cyclone. Due to the staggered arrangement in two rows next to each other but a compact design is also achieved in the horizontal plane.

The individual cyclones are via riser channels and gas transfer and Good transfer channels connected to one another. Inside the cyclones and inside the Risers run the gas and the dusty material using the direct current principle.

The gas transfer ducts of each cyclone are initially offset The cyclone lying next to it open into the riser ducts belonging to this next cyclone, whereupon the gas from the riser channel in a transition channel into the cyclone in question joins.

At the lower end of the cyclones, the material passes through material transfer channels each in the riser of the next one, offset from the previous cyclone Cyclone.

Gas-tight locks can also be arranged in the material transfer channels be.

The invention is in one embodiment in the drawings shown schematically. It shows Fig. 1 a plan view of the device, Fig. 2 shows a vertical section in the direction a-b through FIG. 1, FIG. 3 shows a vertical section in the direction c-d through Fig. 2.

1 to 4 are four cyclones, with cyclones 1 and 3 in a row and the cyclones 2 and 4 are arranged in a second row. The cyclones 1 and 3 of one row are - seen in plan - offset to the cyclones 2 and 4 of the next row. More than four cyclones can also be used.

In the following, the arrangement of four cyclones is assumed.

5 to 8 are riser channels. From these go the transition channels 9, 10, 11 and 12 after the individual cyclones 1 to 4.

13 is the gas inlet opening and 14 the gas outlet. 15 is the Dust inlet and 16 the dust outlet. 17 to 19 are the gas transfer channels from one cyclone to the riser of the next cyclone. 20 to 22 are the Good transfer channels from one cyclone to the ascending channel of the previous one Cyclones.

The mode of operation is as follows: The gas enters the riser channel 8 at 13 and from there passes through the transition channel 12 into the upper part of the cyclone 4. From there it goes through the gas transfer channel 17 into the riser channel 7 of the next cyclone 3 by the ascending duct 7 passes through the transition duct 11 into the cyclone 3. From the cyclone 3, the gas passes via the gas transfer duct 18 to the riser duct 6, from there via the transition duct 10 to the cyclone 2 and so on, until the gas exits the cyclone 1 through the gas outlet 14. It can be seen from Fig. 1 that so that the gas - seen in plan - traverses a meandering path.

Good enters through the inlet nozzle 15 into the rising channel s and is entrained by the ascending gas and exits through transition duct 9 into the cyclone 1. The rotational movement of the material is thrown outward and passes through the Gutübergangskana120 in the riser duct 6, is again entrained by the gas flow and enters the cyclone 2 and so on, until the material emerges in the cyclone 4 through the material outlet nozzle 16. Gas-tight locks 20 'to 22' and 16 'are also arranged in the material transfer channels 20 to 22 and the material outlet nozzle 16.

A meandering course also applies to the estate - seen in plan from inlet 15 to outlet 16 via cyclones 1, 2, 3, 4.

Claims (5)

PATENT CLAIMS: 1. Device for warming up powdery goods, especially cement raw meal in cyclones connected in series, characterized in that the cyclones (1 to 4) in two rows (1, 3 or 2, 4) - viewed in plan - are arranged offset from one another , whereby the gas and the powdery material - also seen in plan - run through a meandering path in the countercurrent principle. 2. Apparatus according to claim 1, characterized in that the gas and the dusty material within the riser ducts arranged in front of the cyclones (1 to 4) (5 to 8) and within the cyclones (1 to 4) run in cocurrent. 3. Device according to claim 1 and 2, characterized in that the gas transfer channels (17 to 19) of each cyclone into the riser channel belonging to the next cyclone (5 to 8) open and the goods through a transition channel (9 to 11) into the relevant Cyclone enters. 4. Apparatus according to claim 1 to 3, characterized in that the material at the lower end of the cyclones (1 to 4) through material transfer channels (20 to 22) each enters the riser (5 to 8) of the previous cyclone. 5. Device according to Claims 1 to 4, characterized in that in the material transfer channels (20 to 22) and the material outlet (16) gas-tight locks (20 'to 22' or 16 ') arranged are. Documents considered: German Patent No. 422 282; British Patent Nos. 418,462,535,099; Journal of the Association of German Engineers, 1952, p.364.