SU376644A1 - : o ^.? UNION - Google Patents

Description

one

This invention relates to the thermochemical treatment of bulk materials in rotary kilns.

A device for supplying gas to a predetermined sector of a rotary kiln is known, which is mounted on the furnace body and comprises a housing with openings, a spool and a stabilizer of the spool position.

The main disadvantage of such a device is that the amount of gas supplied to a given sector of the cavity of the furnace through the layer of material is not proportional to the thickness of the layer. This leads to an increased consumption of gas or liquid supplied to the material layer, and also contributes to an increase in the removal of fine ore particles from the nech, especially at the edges of the segment (when entering the layer and leaving the blowing devices out of the layer). In addition, the material being processed in these places is intensively cooled due to the mismatch of the amount of material and the amount of gas or liquid introduced into it, which slows down the process.

To eliminate these drawbacks, a device is proposed in which the output radial channel of the spool within the reagent supply sector is made of variable section, and the cargo stabilizer is installed on the pin of the cylinder head casing and is kinematically connected with the shank of the spool.

FIG. 1 shows the proposed device in section; in fig. 2 - section on LL

in fig. one; in fig. 3 is a view along arrow B in FIG. one; in fig. 4 - scan the outer surface of the spool.

The device consists of a hollow cylindrical housing 1 with radial inlet 2 and

3 outlet openings, covers 4. Inside the housing / there is a hollow valve 5 with inlet openings 6 and a radial opening (channel) 7 of irregular cross-section. Spool 5 has the ability to rotate around its

axis with the help of its shank, which extends beyond the body / through the flap 4.

Between the spool 5 and the flap 4 there is a bronze ring 8, and on the pin of the cap there is 4 - ma. tnik stabilizer 9 in the form of a lever with a load, kinematically connected with the shank of the slide valve by means of the tube 10. The outer surface of the slide is made with grooves which, after filling them

grease provides additional sealing and reduces resistance to rotation. The device for the supply of reagents is rigidly fixed to the furnace body. Output radial holes 3 body

1 spool valve connected

piping with collectors, to which the nozzles are connected, which are located on the entire surface of the reducing zone of the rotary kiln body.

The angle of the sector of the radial hole 7 and spool 5 is equal to the angle of the sector of gas supply to the cavity of the rotary kiln, and the gas supply sector into the furnace cavity corresponds to the sector in which the permanently located material is located.

The device works as follows.

When the kiln rotates, the fixedly mounted distributor rotates around the kiln axis, however, due to the mating stabilizer 9, the spool 5 is constantly in the Yablozhenie, and the body / will run around it, i.e., the spool with respect to the furnace foundation and the material segment the cavity of the furnace will be at rest, and with respect to the furnace it will be in rotation around its axis: thus, the distributor case 1 rotates with the furnace around its bay, and the złotnyk 5 receives rotation from its stabilizer bar 9 around its axis.

With such a complex rotation of the furnace and the spool valve, the radial holes 3 of the housing 1 are alternately aligned with the sector radial hole (channel) 7 of the spool 5. At the time of entry of the blower devices into the layer, the spool’s radial channel is alone with the third holes of the slide body. Since the radial canal is made of variable cross section (extending to the middle), then the fasa subframe and the future processing of the material will increase with the new material, with a h-ai cePWeHTE: and his eepieAwHe and then the flow of gas

The fluids will decrease and completely Stop poil in the flow path of the blower from the bed. For one revolution of the furnace, the zolnokova distributor provides one revolution (one cycle of rotation) of spool 5 in housing 1.

Installing the rota stabilizer 9 on the pin of the lid 4 allows such a load as the weight of the mating stabilizer to be removed from the tail end of the hood 5. Thus, only the torque acts on the shank, which is transmitted from the stabilizer by the pulley 10. Therefore, favorable conditions are provided for the operation of the spool, since only the torque acts on the shank. To reduce the frictional force between the trunnion and the tiller arm, the latter can be mounted on a rolling bearing.

Subject invention

A device for feeding reagents into the cavity of a rotary furnace, mounted on the furnace body, comprising a cylindrical body with inlets and outlets, a spool and a spool position stabilizer, which, in order to automate the flow of gas into a given sector of the furnace cavity, is proportional to the thickness the layer of material processed in this sector, the output radial channel of the spool within the reagents sector is fulfilled with a cut of the cross section, and Fpy30.BOli stabilizer is set to a H-ai trunnion of cylinders nical Cornus and kinematically coupled with hvbstov zbLbtnIKa com.

FIG. /

FIG. four