DE2227019A1 - Ring burning machine for rolling stock - Google Patents

Description

PittenianwSlte
ZELtENTtHuXUYKEN

Munich 22

Two-sided netr. β | ■.

• ρ / ιΛ

Dneprodzerzinsky ordena Trudovogo

Krasnogo Znameni industrial. ¹ nyj institut June 2, 1972

imeni Arseniceva L / Br

Dneprodzer2insk / USSH ■

5 ¹ UE EOLLfND ^

The present invention relates to ring burners for rollencies material of the type of pellets. These machines can for burning limestone, kaolin, cement clinker, for reducing roasting of ores, for sintering Ores (agglomeration), etc. are used.

At present, over 60 % of the iron ore pellets produced in the world are burned on belt conveyor combustion machines, in which only 40% of the total grate area is effective.

In addition, these machines are very complicated and locking ring (The metal weight reaches 12 and more tons per square meter effective grate area); the machines occupy a large production area and are very high;

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it is difficult on these machines to make pellets for the bed from the total flow of finished burned pellets conveyed to sort them out, to feed them to the department and to put them out of these pellets on the grate and on the walls c (he Brennwagen to lay a bed, the presence of which is a decisive importance for stable and long working machine and for the quality of the pellets produced; Furthermore, a sufficient hermetic seal of the above The space located under the grate and the space under the grate can be carried out more easily

A ring burning machine for rolling material such as pellets is known, which has a rotating grate on which the material to be treated is placed, vacuum blow chambers located under the host for sucking off the gaseous combustion products, for air cooling of the burned material and heat recovery, hydraulic closures for hermetic sealing the room of the machine under the grate facing the atmosphere, cookers placed above the grate to generate the gaseous heat carrier, which is sucked into the material layer to be burned, an entry device moving above the grate, a discharge device and a drive for rotating the grate .

In the known ring burning machine, the grate consists of individual frames with water-cooled shafts and mechanisms to rotate them for the purpose of discharging the fired material

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The grate moves on guide rollers. Support the idlers the plates with grate bars between the guide rollers. A horizontal shift of the grating is caused by Side rolling prevented.

These peculiarities of the construction of the moving grate with numerous sliding parts make this grate very complicated to manufacture and operate and offer no possibility of the combustion zone of the fuel above the burning material layer is sufficiently hermetically sealed to seal. In addition, when the pellets are burned, the system of laying down the protective bed layer made up of the burned pellets complicated on the grate. The numerous parts and devices of the machine with mighty framework make them also space-consuming and large amounts of o-rt 'metal, ever Square meters ... effective grate surface (up to 10 t and more).

The purpose of the invention is to remedy the disadvantages mentioned the ring burning machine.

The invention is based on the object of creating such a ring burning machine that is easier to manufacture and operate and less expensive isj uhd hermetically seal the spaces above the grate, under the stoves and under the grate, as well as the placement of the pellets made from the fired pellets Bed protective layer on the grate simplify Ιά, βί.

It becomes a ring burning machine for rolling stock As. Pellets proposed a rotating grate on which

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the material to be treated is abandoned, vacuum blowing chambers located under the grate for sucking off the gaseous Firing products, for air cooling of the fired material and heat recovery, hydraulic closures for hermetic Sealing of the area of the machine under the grate from the atmosphere, stoves placed above the grate to generate what is sucked into the layer of material to be burned gaseous heat carrier, an entry device moving over the grate, a discharge device and a Includes drive for rotating the grate. According to the invention possesses the machine has a rotating housing in the form of two vertical, is formed coaxially arranged cylinders, which are connected at the top by radial transverse webs, between which there are separate vacuum blowing chambers, with the lower ends of these cylinders in those closed from below Annular spaces between two pairs of fixed cylinders are lowered and with them two hydraulic ones Closures form, while the annular space under the chambers between the hydraulic closures is a common one Vacuum blow collector forms.

The device for rotating the machine housing is expediently designed in the form of an annular toothed ring, the one on the lower face of one of the cylinders is attached and is set in rotation by drives working in parallel via gear wheels, whereby under the two,

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into the hydraulic locks There are support rollers (with splashes) on which these cylinders rest.

This gives the option of using both the grate above the grate, as well as the space below the host perfectly to hermetically seal which spaces contain the rotating vacuum blowing chambers and the fixed collector »

It is also useful on the bottom of the vacuum blow collector vertically adjustable along its central circular line under the mouths of the vacuum blowing chambers Rods with plates placed on them from above to regulate the cross-section for the passage of gases and accordingly the vacuum-blowing mode of operation of the machine built in, which makes it superfluous to have separate gas discharge lines with throttles under the vacuum blowing chambers.

It is also advisable to have the discharge device fixed in place with ζ J (a wedge knife, which.

in the vertical direction and under one

Angle to the grate for the purpose of uninterrupted formation (on this ^ one from -. burned pellets existing bed layer

■ is, a mechanism for loosening this bed and cleaning it and the grate from dust, which then in the vacuum blow collector is sucked in, as well as with a discharge knife, that regulates the height of the bed. This protects the bed from clogging by dust and

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simplifies the application of the bed protective layer from the fired Pellets, which increase the stability of the machine, especially but the grate increased, the quality of the pellets produced improved, and the efficiency of the machine improved increases.

The present invention provides a hanging machine '. news? Type has been created for rolling stock that through the simple construction of their main assemblies Operational safety and stability. And the bed layer always remaining on the grate from '_ -. burned pellets, with a high degree of tightness of the under · the host and the space above the grate as well as reducing the weight of the machine by more than that works twice per square meter of the effective grate area.

In addition, the invention is an exemplary embodiment and with reference to drawings \ '■ show

Fig. 1 the ring machine according to the invention for rolling Material, in vertical section;

Fig. 2 the same machine, top view.

The ring machine shown in Figures 1 and 2 'for rolling stock has a rotatable housing 1, which is shown in Form of two vertical, coaxially arranged cylinders 2 and 35 is formed, which at the top by radial transverse webs, u.zw. Grate support 4 and inclined guide walls 5 connected

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are, between which there are separate vacuum blowing chambers. 6 are located, in the upper part of the grate supports 4 grate bars are laid, which form an annular grate 7 on both

Sides is limited by values walls 8 and 9, to which on the Inside, a Wäianesämmschicht 10 connects.

Above the effective grate area, where the processes of material treatment going on are stoves 11 with fireproof

JL

Lining 13 and fitting IJ and 14 for the supply of gas or by liquid fuel (13) and air (14) attached to the burners.

The lower parts of the vertical 'cylinders 2 and 3 are in the annular spaces between cylinders 15, 16 and 17, 18 lowered, which are arranged coaxially to the cylinders 2 and 3 and form two hydraulic closures 19 and 20, which of are closed by bottoms 21 and 22 below.

In the hydraulic locks 19 and 20 there are rollers

23 (with flanges) arranged on which ring rings fastened by means of the lower end faces of the cylinders 2 and 3

24 and 25, of which one (24) is a ring gear or a pin ring gear is, the housing 1 rests, which is driven by gears 26 of drives working in parallel with electric motors 27 and gears 28 in rotation (the direction of rotation is indicated by an arrow).

The rotation of the housing 1 of the machine can also be effected by drives with the electric motors 27 and gears 28.

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which are connected to idlers 23, i. e. through priority gears (by means of friction).

The space between the cylinders 16 and 17, the floor 29 connecting them and the vacuum blowing chambers 6 forms one Vacuum blow collector 30 (the fixed inner surface of the same can be lined with refractories or protective plates)

In the center of the vacuum blow collector 30 is in the zone "A" of the cooling of fired pellets a blow chamber - (air chamber) 31 arranged, which has plates 32 in its upper part on both sides (in the direction of movement of the housing 1), each of which initiates the gas flow in one of the vacuum blowing chambers 6 instantly as the chamber is above the plate is located, turns off, the blow chamber 31 also has a corresponding has lateral sealing (not shown).

The working volume above the layer of material to be treated, which is on the grate, is hermetically sealed by means of metallic jackets 33 and y ± , which in their lower part with the outer walls of the cylinders 15 and 18 of the hydraulic closures 19 and 20 and in their upper part are connected to the herds 11.

To regulate the vacuum and blowing equipment in the vacuum blowing chambers 6 are in the individual zones of the machine in the bottom 29 of the vacuum BlasSammlers 30 rods 35 with attached above Plates 36 installed, which in the vertical direction

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be moved by a mechanism 37 and the cross-section between the plates 36 and the lower collar edges of the Change vacuum blowing chambers 6.

Above the rotatable housing "1 is on stationary supports 38 a discharge device 39 with a wedge-shaped knife 39a mounted, which (not shown) facilities for

Shift in the vertical direction - and under one Owns angle. The smock of this wedge-like knife the fired and cooled pellets are discharged from the host 7 in chutes 40 and 41.

The lower edge of the wedge-shaped knife 39a is arranged above the host in order to keep a constant Bed shift off. to form burned pellets, which also point the pellets over the top edge of this knife can slide down.

For loosening the bed, cleaning it and cleaning it the grate of dust, the discharge device has a mechanism 42 with finger pins 43, the progressive Perform rotating movements while leveling the bed layer, renewing it and throwing the excess pellets into the bed Slides 40 and 41 a knife 44 is provided, which can move in the vertical direction.

The zone between the wedge-shaped knife 59 ^ and the ejection knife 44 is also used to monitor the state of the grate, to arrange and replace the grate bars and '' others

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- ίο -

technological purposes.

Behind the thrower 44 is in the direction of rotation Machine arranged an entry device 45, which in pendulum mode works and is used to load the raw pellets (the material to be treated) on the grate 7.

In the vacuum part of the vacuum blower 3> O is through its Bottom 29 (or through the side walls below the hydraulic closures) a gas discharge line 46 with throttle 4-7 to discharge the gaseous combustion products and regulate the entire vacuum state in the machine and connected. Furthermore, the gas discharge is to a dust collector, an induced draft fan and a smoke evacuation pipe (not shown) connected.

The blow chamber 31 is followed by a blower Coming (not shown) air line 48 with throttle 49 for regulating the air conditions when cooling the fired Pellets by blowing yoi? Air from below. at the cooling of the pellets by sucking the air through the layer of pellets from top to bottom with the following Directing the heated air (as a heat transfer medium) into the zones of the active surface of the machine is used instead of the fan Smoke draft, not shown, provided.

A pipe 50 with throttle 51 connects the gas discharge line 46 and the air line 48, whereby the gas is air ratios - regulated · - · may be.

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The heated air flows out of the cooling zone "A" .for Pellets (as heat transfer medium) under the stoves and above the layer of pellets to be treated in the

cLen, ne opposite direction, while the air flows in high ducts 52 in the direction of rotation of the machine for drying raw pellets and for burning them (the direction of movement of the air is indicated by arrows).

The debris is removed from the ring-shaped vacuum blow collector JO via funnels (dust bags) 53 built into the base 29 with chutes 54 and closures 33 , into which it slides automatically or by means of scrapers. 56, which are attached to the rotatable housing 1, is scraped.

It is intended that .individual, under the -conditions of parts of the machine working at elevated temperatures, for example to cool the stove body with water, among other things.

To operate the machine are on the outside and inside Stages 57 and 58 available.

The ring burning machine works as follows.

The hydraulic closures I9 and 20 are made of one Water pipe 59 filled up to the marks which from the »'ert des Dependent on the negative pressure in the vacuum blower collector 350. The electric motor 27 is switched on, which provides fine speed control possesses, and the housing 1, which rotates, is driven by the insertion device 45 operating in the pendulum mode with · filled with raw pellets, which are fed from the pelletizing department by means of conveyors. After loading the whole

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Grate 7 with raw pellets, the machine is shut down.

Then the induced draft fan is switched on and by means of the throttle 47 on the gas discharge line 46 when the valve is closed

Throttle 49 on the air line 48 and when open

Throttle 51 on the pipeline 59 ^ ^{as the} entire vacuum ία vacuum blowing chamber 50 is regulated, while the vacuum in the vacuum blowing chambers 6 is regulated by vertical displacement of the rods 55 with the plates 56 by the mechanism 57.

After the water begins to flow out of the hydraulic closures via drainage pipes 60, the water pipe is opened 5 ° for continuous precipitation of the hydraulic closures 19, 20 open with water.

Compliance with the regulations of safety technology ignites one moreover through the viewing openings of the herd in the order opposite to that of the rotation of the machine combustible gas in the burners, with regulation of the temperature and heat as well as the vacuum and air conditions the pellets successively predried, heated and be burned.

In the specified sequence the burner ___ ignition the pellet burning process is also carried out in the same order, i.e. in the opposite direction to the rotation of the machine, completed.

After keeping the pellets at the specified burning temperature without overheating the grid

51, opens the throttle grate comes, you close the throttle ^v y ^{1 {} -9 and cool the Pelleti

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by means of the air, ν / el ehe through the layer of fired pellets is blown or sucked through.

Then the rotary drive of the machine (with a Rotation speed of 1-3 rev / h) switched on, raw pellets abandoned on the grating and continuous work the machine sets in. ■

At the time. ^When the machine is in operation, the fired and cooled pellets are continuously discharged by the wedge-shaped knife 39a into the chutes 40 and 41 and from these by means of a conveyor 61, onto which the Abrjgb also arrives from the vacuum blow collector 30 via the closures 55, whereupon the pellets are sieved, the fine return material being separated and fed into the technological pelletizing process, while the finished pellets are fed to their destination (the abrasion can also be removed hydraulically from the vacuum blow collector).

Part of the finished pellets remains on the grate 7 underneath the wedge-shaped knife 39a raised slightly above it and forms a bed layer that always remains behind.

Furthermore, the bed of the burned pellets is loosened by the mechanism 42 as well as this bed and the The grate 7 is cleaned of dust which is sucked into the vacuum blower collector 30 through the vacuum blow chambers 6.

The optimal bed layer height is finally determined by means of the Discharge knife 44, while the excess pellets in the chutes 40, 41, i.e. in the flow of finished pellets,

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be directed. . :

The one that emerged upwards from the layer of cooled pellets heated air becomes in self-flow and by means of the air ducts 52 (several such pipelines can be provided be) under the stoves 11 in the drying zones of the raw pellets as well as for the secondary combustion of the combustible ones Smoke components supplied and distributed over the layer to be burned to regulate the entire heat control of the process.

In the cooling of the pellets by means of through suction of air through the layer from top to bottom through the Blaskamzaer .31 heated air i \ x the flue is pressed into the pipes 52, which it among the art their end faces by Vi / ände 62 closed herds 11 feed.

The construction and mode of operation of the ring burning machine enable the pellets to burn by burning gaseous and liquid fuel over them Layer as well as by burning solid fuel applied to the surface of the rohari pellets. On the proposed machine can process of reducing roasting of ores, metallization of iron ore raw materials, burning limestone, kaolin, cement clinker, agglomeration be carried out by ores, etc.

With large dimensions, the machine according to the invention can have up to 90 % effective grate area.

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Claims (4)

June 2, 1972 L / Br PATENT CLAIMS: 1. Ring burning machine for rolling stock: w * e. Pellets, which have a rotating grate on which the material to be treated is placed, vacuum blow chambers located under the grate for extracting the gaseous fuel products, for air cooling, the fired material and heat recovery, hy hydraulic locks for hermetically sealing the area of the machine under the grate from the atmosphere, Cookers placed above the grate to generate the gaseous heat sucked into the layer of material to be burned carrier, an entry device moving over the grate, a discharge device and a drive for rotating the Rostes. Comprises, characterized that the machine has a rotatable housing (1) which is in the form of two vertical, coaxially arranged cylinders (2 and 3), which are connected at the top by radial transverse webs (4), between which separate vacuum- Blowing chambers (6) are located, the lower ends of these cylinders (2 and 3) in the annular spaces closed from below between two pairs of fixed cylinders (15, 16 and 17, 18) are lowered and with them two hydraulic ones Closures (19 and 20) form, while the annular space under the chambers (6) between the hydraulic closures (19 and 20) forms a common vacuum gas collector (30) 209 8 53/0666 2. Machine according to claim 1, characterized gekennz'e I η et that the "device for rotating the machine housing (1) has an annular ring gear (24) which is attached to the lower end face of one of the cylinders (2) and of. drives (27, 28) working in parallel are driven via Z & iinräder (26), whereby under the two cylinders (2 and 3) lowered into the hydraulic locks (19, 20) there are support rollers (with flanges) ( 23) on which these cylinders (2 and 3) are resting. 3 · Machine according to claims 1 and 2, characterized in that that on the bottom (29) of the vacuum blow collector (30) along its central circular line below the mouths of the vacuum blow chambers (6) located vertically adjustable rods (35) ^ it placed on them from above Plates (36) for regulating the cross-section for the passage of the gases and accordingly the vacuum-blowing mode of operation are built into the machine. 4. Machine according to any one of claims 1-3, characterized in that the discharge device (39) has the following fixedly mounted parts: a wedge knife (39a) ^s '"" in Vertical direction and at an angle to the grate (7) Z7; ecte uninterrupted formation 'on this ^ a layer consisting of the burned pellets / ^ ⁰ . ¹ 'is a me- 209853/0666 mechanism (42) for loosening this bed and for some of it and the Eostes (7) of dust, which then goes into the 7 vacuum blow collector (30) is sucked in, as well as a throwing knife (44), which regulates the height of the bed layer. 209853/0666