UA125441C2 - Cooling of bulk material - Google Patents

Abstract

Input device (1) for the introduction of bulk material (2) into a container, which comprises a rotary bunker (8) rotatable about a central axis of rotation (9), having an inlet opening (7) for the bulk material (2) through which the central axis of rotation (9) passes, and having a discharge opening (10) for the bulk material (2), the discharge opening (10) being arranged eccentrically; a supply bunker (11), in which the discharge opening (10) of the rotary bunker (8) opens; at least three drainpipes (12a, 12b, 12c) emanating from the supply bunker (11); wherein the supply bunker (11) and the drainpipes (12a, 12b, 12c) are stationary. The device and the method for cooling the bulk material (2) using this input device, and the cooling device includes a mine refrigerator (4) with a refrigeration shaft (3), with a rotary bunker (8) and a supply bunker (11) located outside the refrigeration shaft (3).

Description

The field of technology to which the invention belongs

The presented invention relates to a loading device for introducing a loose material consisting of particles with different particle sizes into a container, preferably a mine cooler.

Technical level

Hot bulk material, such as iron ore sinter from a sinter plant, usually needs to be cooled before it can be stored in a bunker and/or further processed.

To cool the hot loose material, it is known to use cooling devices with a cooling shaft through which. during operation, cooling gas is passed in counterflow mode with loose material - so-called mine coolers. In such mine coolers, the heat exchange between the hot bulk material and the cooling gas takes place in the cooling mine. Hot bulk material is usually introduced into the cooling shaft from the upper end, and moves down the cooling shaft under the influence of gravity; at the lower end of the cooling shaft, the loose material is discharged in a cooled state.

Refrigerant gas is usually introduced from the lower end of the cooling shaft and discharged higher in a heated state in the form of so-called waste gas. When the cooling gas is air, it is called cooling air and exhaust air. During the cooling of the bulk material, they try to avoid uneven, correspondingly spatially inhomogeneous, cooling of the bulk material. If, after passing through the cooling shaft, the bulk material has areas that have only been slightly cooled and are therefore at a high temperature, such hot material may, for example, damage the conveyor and/or bulk material storage hopper downstream of the cooling device. In addition, in this case, the transport and/or additional processing of the bulk material may be slowed down, as it is first necessary to wait until the specified areas of the bulk material have cooled sufficiently.

To achieve the best and most efficient cooling in the cooling shaft, the bulk material must be distributed in the cooling shaft as homogeneously as possible in terms of particle size - that is, with no size segregation as far as possible

It is possible in the case of loose material with different particle sizes. The non-uniform particle size distribution in the cooling shaft leads to different degrees of resistance to the flow of the cooling gas, and thus to areas that, compared to other areas, are less blown and less cooled. In addition, large particles cool much more slowly than small particles, because the ratio of their surface area to the volume is less favorable. If the bulk material contained in the cooling shaft has areas in which the concentration of large particles is above average in these areas, the bulk material cools more slowly than in areas with average or below average concentration of large particles. Thus, it is advantageous if the grains of bulk material are uniformly distributed in the cooling shaft spatially relative to their size in order to achieve uniform cooling of the bulk material in the cooling shaft.

In such mine refrigerators, which are shown in patent documents CM204630395),

СсМ204630396О), СМ1032343618 or СМ204495075, supply of hot agglomerate as a loose material is carried out periodically or centrally. As a result, there is a size separation of the hot agglomerate, which usually has a fraction of very large grains with particle sizes up to 200 mm, and cooling becomes ineffective.

Patent document zB2071139A shows a loading device for loose material, but it is not clear whether it would be suitable for the effectiveness of counteracting the size separation of hot agglomerate in a mine cooler.

For the purpose of continuous feeding with the help of moving loading devices, attempts are made, if possible, to uniformly distribute the particles in size in the shaft when they are introduced into the cooling shaft, even if already size-distributed bulk material is supplied for feed. The problem is that the moving parts of the system are exposed to the high temperature of the loose material and the heated cooling gas. This can lead to significant wear and tear and costly maintenance.

The temperature of the hot sinter from the ore agglomerate is about 400-750 "C, and the cold ore is fed into the blast furnace; the ring cooler and the belt cooler can only use about 30 95 heat of the waste gases due to their design features; the vertical cooling shaft - that is, the mine refrigerator, 60 respectively, the cooling shaft of the mine cooler - can improve the degree of heat recovery, so that at present, many research institutes and enterprises use vertical cooling shafts to reuse the waste heat of the ore agglomerate. For example, the cooling device of the sintering furnace according to patent application no. 201310127744.5, a vertical machine for cooling agglomerate according to patent number 93117175.X, a vertical device for cooling and heat recovery of a sintering furnace according to patent number 201310672967.X, etc., one series of equipment with a vertical refrigerating sha which has already been implemented for work in the company

Tiapip Tiaptepd egeei So., Tsa., which greatly improved waste heat utilization.

The decisive factor in the degree of recovery of waste heat is the tightness of the vertical refrigerating shaft, and the places of leakage from it are mainly the loading and unloading systems. At present, the modes of feeding into vertical cooling shafts include: oblique bridge and distribution of material in the form of an umbrella (patent number 201511002240.6, polygonal multi-tiered multilayer, with 36b0-degree air supply, tower for cooling ore agglomerate); chain scraper conveyor and rotating material distribution (patent number 201320185479.1, heat exchange device for cooling the ore sintering furnace); patent number 201520756682.9, apparent heat recovery device for agglomerate; direct connection with the discharge end of the sintering unit and material distribution in the form of an umbrella in the form of a dial (patent number 201310127744.5, cooling device of the sintering furnace); patent number 93117175. X, vertical machine for cooling agglomerate; patent number 201310672967.X, vertical device for cooling and heat recovery of the sintering furnace; the skew bridge type feed is a burst action and a single tipping of the bucket, but the sealing of the top of the mine is not as good as in the case of continuous operation of the chain scraper conveyor and pressure discharge through the rollers. The feeding mode during direct connection with the discharge end of the sintering unit has a rather significant limitation of the height of the placement of the sintering unit and the vertical mine in the previous procedure.

Currently, common discharge modes from vertical cooling shafts include: star discharger (patent number 201220491407.5, sinter cooling system with highly efficient heat recovery); patent number 201610150596.2, system,

Which is used to cool the ore agglomerate and efficiently reuse the apparent heat; patent number 200910074513.6, a vertical agglomerate cooler capable of effectively disposing of the apparent heat of the agglomerate; electric vibrating feeder (patent number 93117175.X, vertical machine for cooling agglomerate); electric vibratory portion unloading device and rotary unloading valve (patent number 201320185290.2, cooling system unloading device for sintering furnace), (patent number 201520756682.9, agglomerate apparent heat disposal device). The ore agglomerate entering the vertical cooling mine is subject to particle size requirements that should not be too small; star/lobe unloading equipment has good tightness, but extrusion of material can lead to the entrapment of granular materials in the gaps of the equipment, which affects normal operation; the electric vibrating feeder does not create conditions for crushing the material, but the proper height of the column of sealing material must be taken into account.

The degree of heat recovery in vertical cooling shafts is related to the conditions of heat exchange between the solid material and the gas, and the distribution of the material and the modes of blowing are most important. Currently, the modes of material distribution for vertical cooling shafts include: circular distribution of material (patent number 201520756682.9, device for recovery of apparent heat of agglomerate; patent number 201310127797.7, device for circular supply of the cooling system of the sintering furnace); screw-type vertical loading device and dial-type material distribution (patent number 201320185480.4, balanced type distribution device for cooling the ore agglomerate furnace; patent number 93117175.X, vertical device for cooling the agglomerate; patent number 201511002240.6, polygonal multi-layer multi-layer, with 360-degree air supply, tower for cooling ore agglomerate; patent number 201320814396.4, loading device for vertical system of cooling and waste heat recovery of the furnace, for ore agglomerate), etc. Ventilation modes include: a device with numerous air chambers for circumferential blowing (patent number 201310128026.X, cooling of the furnace for ore agglomerate); central blowing (patent number 201320814379.0, cold air supply device for a vertical system for cooling and waste heat recovery of the furnace, for ore agglomerate), a combination of central (multilayer umbrella type) and surrounding (annular air supply) blowing (patent number 201520756682.9, device for recovery apparent heat of agglomerate); ventilation grille (patent number 201511002240.6, polygonal multi-tiered multi-layer, with 360-degree air supply, tower for cooling ore agglomerate); a circumferential configuration of numerous exhaust fans (patent number 200910074513.6, a vertical sinter cooler capable of effectively disposing of the apparent heat of the sinter), (patent number 93117175.X, a vertical sinter cooler) etc.

Equipment that exists for distribution of material distributes large particles along the edge; by changing the material spreading angle, it is not possible to achieve an improvement in the material distribution conditions with a uniform distribution of the material along the cross section of the mine. The ventilation mode uses a combination of ambient and central blowing, which is suitable for vertical mines with large sections, and can guarantee uniform and sufficient contact between cold air and materials.

In summary, the existing vertical cooling shafts usually have problems such as poor sealing and uneven distribution of materials, etc., which cause bad working environment, high discharge temperature and low exhaust gas temperature, and directly affect the operation unloading conveyor equipment, as well as the degree of utilization of heat and heat content; in such a way that the economic benefits that are created are not good, and the maintenance costs of the equipment are very high.

The essence of the invention

Technical problem

The object of the present invention is to provide a loading device, a device for cooling bulk material, and a method for introducing bulk material into a container, which can achieve and improve the uniform cooling of bulk material consisting of particles of different particle sizes, with a continuous supply during reduced wear.

Problem solving

This goal is achieved with the help of a loading device for the introduction of loose

From the material consisting of particles with different particle sizes, into a container, characterized in that the loading device includes: - a rotating hopper, designed to be able to rotate around a central axis of rotation, having an inlet for loose material through which the central axis passes rotation, and having an outlet for loose material, and the outlet is located offset from the center; - feed hopper into which the outlet of the rotating hopper opens; - at least three downpipes protruding from the feed hopper; and the feed hopper and downpipes are stationary.

The container is mainly a refrigerating shaft of a shaft refrigerator. A shaft cooler has at least one cooling shaft. A mine cooler usually has a vertical longitudinal axis relative to its cooling shaft.

The loose material is preferably hot, i.e., has a temperature of at least 300 °C, preferably at least 400 °C, preferably is a hot agglomerate. As already mentioned in the introduction, the temperature of the bulk material is reduced in the mine cooler by countercurrent heat exchange with the cooling gas, and the bulk material is hot when introduced into the mine cooler. For example, the agglomerate during introduction can have a temperature in the range of 400-700 "C, or even up to 750 "C.

Loose material consists of particles with different particle sizes; for example, during sintering there can be a very wide range of grain sizes with particle sizes up to 200 mm.

A hopper should be understood as a large container for receiving bulk cargoes, in the case of the presented application, for receiving bulk material.

The rotating hopper can rotate around a central axis of rotation, which is usually vertical in the case of mounting the loading device on a container - such as the cooling shaft of a mine refrigerator. During operation of the loading device, the rotating hopper rotates around this axis of rotation. The axis of rotation passes through the inlet of the rotary hopper for loose material. For example, the inlet of a rotary bulk material hopper is centrally located, that is, in the middle - in this case, the central axis of rotation passes through the centrally located inlet.

Through the inlet, the loose material transported to the loading device 60 with the help of a conveyor device - for example, in the case of agglomerate as a loose material,

by a chevron conveyor - it is introduced into a rotating hopper. Given the circumstances that the central axis of rotation passes through the inlet opening - for example, in the case of the central location of the inlet opening - the position of the inlet opening relative to the conveyor device during operation does not change when the rotating hopper rotates around the central axis of rotation. This facilitates access from the conveyor device to the rotary hopper.

The rotating hopper has an outlet hole offset from the center. The off-center outlet of the rotating hopper opens into a stationary feed hopper, which is positioned next to the rotating hopper. To use gravity to move loose material, it is preferable to align the loading device with a rotating hopper placed above the feed hopper.

When the loading device is mounted on a container, such as the cooling shaft of a mine cooler, the rotary hopper is placed above the feed hopper so that the bulk material is pushed from the rotary hopper into the feed hopper by gravity. The central axis of rotation of the rotary hopper does not pass through the outlet hole offset relative to the center.

Displaced relative to the center, the outlet opening of the rotating hopper can be, for example, an eccentrically placed slot in the bottom of the rotating hopper. During operation, the loose material under the influence of gravity passes through the discharge hole from the rotating hopper into the feed hopper, which is located below the rotating hopper.

The feed hopper gets its name because it feeds the loose material for further entry into a container, such as the cooling shaft of a mine cooler, through downpipes. The feed hopper is stationary, unlike the rotary hopper, it does not move during the operation of the loading device.

The so-called downpipes, at least three, depart from the feed hopper. In the case of a loading device mounted on a container, for example the cooling shaft of a shaft cooler, they extend downwards from the feed hopper, that is, they are placed below the feed hopper. Downpipes are pipes through which loose material exits the feed hopper under the influence of gravity and is poured out of them.

The end of the downpipes connected to the feed hopper may be called the feed end, and the other end of the downpipes may be called the shaft end.

The cross-section of the downpipes preferably becomes larger as the distance from the feed hopper increases, so that they expand as they move away from the feed hopper. This reduces the risk of clogging.

For example, conical pipes are attached to the feed hopper as downpipes with a narrow end, that is, the feed end.

Through the slot in the bottom of the feed hopper, the loose material under the influence of gravity enters the downpipes placed in the appropriate place on the bottom of the feed hopper.

The downpipes are preferably located at the bottom of the feed hopper so that in the event of a clogging of the downpipe, the loose material in the feed hopper above this blocked downpipe can, at least to a greater extent, pass through another downpipe.

For example, if the loading device operates in conjunction with a shaft cooler, the downpipes extend into the shaft cooler at their lower, potentially wider end, and during operation the material exits this potentially wider end of the downpipe -. for example, potentially conical pipes - in the cooling shaft of the mine refrigerator. During operation, the bulk material will flow from the feed hopper through the downpipes into the cooling shaft under the influence of gravity. The layer of loose material formed in this way is blown by cooling gas - mainly cooling air - in counterflow mode.

Advantageous results of the invention

Since during the operation of the loading device, the rotating hopper rotates around the central axis of rotation, while the loose material is introduced into it through the inlet hole, which is preferably located in the center, the effect of the phenomenon of distribution of the size of the loose material, which occurs during transport from the conveyor device, is reduced to the rotary hopper. As an example, particles discharged from a conveyor belt will fly differently depending on size, that is, they will be separated - after which, as a result of the rotation of the rotating hopper, the particle size distribution in the rotating hopper will be equalized.

Since the rotary hopper rotates during the operation of the loading device, while the feed hopper is stationary, and the discharge opening is located offset from the center,

the loose material under the influence of gravity moves from the rotating hopper axisymmetrically to the feed hopper located below the rotating hopper. Accordingly, the downpipes are filled from the feed hopper with bulk material of approximately uniform particle size distribution as the bulk material from the feed hopper passes to the downpipe - ultimately minimizing the non-uniform particle size distribution in a container such as a mine cooling shaft refrigerator, especially in a circular direction. The release of loose material is facilitated by the cross-sectional area of the downpipes, which gradually increases. Inside a container, for example, a cooling shaft of a mine cooler, cones of bulk material are formed near the lower end of the discharge pipes, compared to using a single downcomer - for example, during the central flow of bulk material into a container, for example, a cooling shaft - and the cone is less high than the presence of numerous downpipes. As a result, the separation in magnitude in the radial direction around the corresponding cones of bulk material is reduced, compared to higher cones of bulk material. At least three downpipes should be present to achieve a beneficial effect, compared to a single downpipe. In general and as a whole, in the combination of the corresponding inventive features of the loading device during operation, this synergistically leads to the following effect: even in the case of feeding the size separation of loose material into the inlet of the loading device - for example, the effects of size separation are already evident on the feeding agglomerate chevron conveyor - in the container - for example, the refrigerating shaft of the mine refrigerator connected to the loading device - an axisymmetric distribution of the particles of the bulk material is achieved, which is essentially uniform both in the radial and circular directions, and relative to the longitudinal axis of the container - for example, the refrigerating shaft mine refrigerator.

The effects of size separation are equalized across the entire cross-section of a layer of loose material formed in a container, for example, a cooling shaft.

During application, the device for cooling bulk material has the following effects: improved cooling efficiency, uniform and effective cooling of bulk material, and good output of thermal energy for further use of heated

From cooling gas.

The loading device according to the patent document 5B2071139A differs from the claimed loading device in that, while on its upper surface there is a rotating device with the code number Z position, this rotating device has a discharge opening for loose material offset relative to the center, its inlet opening for loose material the material does not pass through the central axis of rotation. The introduction of the material is not centered. Therefore, the size separation mechanism and, as a result, the cooling performance and uniformity also differ from the loading device as claimed.

Another purpose of the presented application is a device for cooling loose material composed of particles with different particle sizes, which includes a mine cooler with a cooling shaft, and a loading device according to the invention for introducing loose material into the mine cooler, and the loading device is located at the upper end of the mine cooling shaft refrigerator, and the downpipes open at their lower ends into the cooling shaft, and the rotary hopper and the feed hopper are placed outside the cooling shaft.

In the refrigerating shaft, the hot bulk material is cooled by cooling gas passing through the bulk material in counterflow mode.

In such a device for cooling bulk material, the rotary hopper and the feed hopper are located outside the cooling shaft and are therefore not exposed to the heated cooling gas present - especially at the upper end - in the cooling shaft. Heat is supplied to the rotary hopper and feed hopper by the hot bulk material, but they are also cooled by ambient air. The external location of the cooling shaft reduces the risk of thermal damage, which is especially great for moving parts - that is, for example, for a rotating hopper. The stationary components of the downpipes are open with their lower end - the shaft end - into the cooling shaft; from these shaft ends, loose material is poured into the cooling shaft.

The device according to the invention for cooling the bulk material or the loading device according to the invention preferably operates in a continuous mode, that is, the bulk material 60 is introduced continuously.

The cooling shaft is preferably formed, at least partially, axisymmetric. It mainly includes a hollow cylindrical section of the mine. Accordingly, it is advisable that the axis of the cylinder of the hollow cylindrical section of the mine be aligned vertically.

The cooling shaft is mainly a heat exchanger with air cooling.

The device for cooling the bulk material expediently includes at least one fan, in particular, a compressor, for pumping cooling gas, for example, cooling air, into the cooling shaft. In addition, the device for cooling the bulk material may have at least one fan for extracting cooling air from the cooling shaft at its upper end.

The cold gas, respectively, the cold air blown into the cooling shaft, respectively, into the layer of loose material inside the cooling shaft, must be distributed as uniformly as possible. For this purpose, the cooling air comes from a central exhaust air duct - also called a subduct - placed near the bottom of the cooling shaft to guarantee an even distribution of cold air inside the vertical cooling shaft. The pipelines supplying the cooling gas are placed in a circle and centrally in the refrigerating shaft with annular and central exhaust air channels. Compared to only circular or only central exhaust air ducts, the cooling air is distributed more evenly.

The cooled loose material is unloaded onto a belt conveyor by means of numerous inclined discharge trays evenly distributed near the bottom of the mine, according to one variant, by means of an electric vibratory feeder.

The discharge channel of the inclined unloading trays on the vibrating feeder is mostly equipped with a dust cover.

In one preferred embodiment, a drive motor device is provided for the rotating hopper, and a toothed crown on the upper edge of the rotating hopper, respectively, the body of the rotating hopper. Said drive motor device may include one, two or more motors symmetrically placed on the upper edge of the rotating hopper, respectively, the body of the rotating hopper. Driven by a gear motor or motors

Zo rotates and causes the rotating hopper to rotate. The engine or engines are located outside the mine, in an area that is not exposed to intense heat. Thanks to this placement, the risk of thermally induced failure is negligible.

In one preferred embodiment, variable frequency control is applied to the drive devices of said rotary distributor, air compressor, electric vibratory feeders to ensure the stability of the loading level inside the vertical cooling shaft of the mine cooler, as well as the cooling efficiency and uniformity of the hot ore agglomerate.

In one preferred option, the inner wall of the cooling shaft of the shaft cooler is provided with a lining above the annular outlet air channel. This lining includes an inner working layer and an outer insulating layer; the inner working layer is made of refractory bricks, and the outer insulating layer is formed of heat-resistant sprayed materials; the lining is supported by a heat-resistant support frame.

Another object of the present invention is a method, preferably continuous, of introducing a bulk material consisting of particles of various particle sizes into a container, preferably into a cooling shaft of a mine cooler, the bulk material being first fed to the center of a rotating hopper which rotates around a central axis of rotation , is then eccentrically poured from the rotating hopper into the stationary feed hopper, and then from the stationary feed hopper through the stationary downpipes into the container, preferably into the cooling shaft of the mine refrigerator.

As for the center feed, it should be understood that this is the feed through the hole through which the central axis of rotation passes. The central axis of rotation is mostly vertical.

During such a technological mode, preferably with a loading device according to the invention or with a device for cooling bulk material according to the invention, the beneficial effects specified in the description of the loading device and the device for cooling bulk material can be achieved.

The text of the submitted application shows a processing method and a system using a vertical refrigerating mine to recover the heat of ore agglomerate, and the use of a new vertical refrigerating mine - that is, a mine cooler, 60, respectively, a refrigerating mine of a mine cooler - to cool the ore agglomerate can improve the degree of recovery of the waste heat of the ore agglomerate, and improve the environment at the production site to the highest degree.

The following technical scheme is used:

The method of processing using a vertical refrigerating mine - that is, a mine refrigerator, respectively, a refrigerating mine of a mine refrigerator - for the recovery of waste heat of ore agglomerate - also called agglomerate for short - which includes the following stages: 1) Hot ore agglomerate with a temperature above 400 "С, formed in the sintering plant, falls on an inclined tray that has been crushed by a single-roll crusher, fed to a chain bucket conveyor or a chevron conveyor by means of an electric vibrating feeder 1, and then rises as a loose material into a vertical cooling shaft, that is, the cooling shaft of the mine refrigerator; the upper part of the vertical refrigerating shaft is equipped with a rotary distribution device - which, according to the wording previously used in the application, is a rotary hopper; for which a rotary hopper housing can be defined, which will then sometimes be called a distributor housing rystra, and for which can be defined the space of the rotary hopper, which will later sometimes be called the rotary distribution chute - and the distributor - which, according to the wording previously used in the submitted application, includes the feed hopper and downpipes; the feed hopper will later sometimes be called a drum, and the downpipes will later sometimes be called emptying trays, distributed, preferably uniformly, along the circumference of the vertical cooling shaft; ore agglomerate is unloaded from the front of the chain bucket conveyor or chevron conveyor and enters the rotating distribution device through the receiving tray; a rotating distribution device distributes materials along the circle of the distributor; emptying trays are used to empty the feed hopper and evenly distribute the hot ore agglomerate across the cross section of the vertical cooling shaft; the cold air used as a cooling gas inside the vertical cooling shaft is forced by an air compressor and exits from the outlet of the central air duct and the outlet of the ring air duct near the bottom

From the vertical cooling shaft - also called subducts - to ensure uniformity of distribution of cold air inside the vertical cooling shaft. 2) In a vertical refrigerating mine, the loose material of the ore agglomerate is subjected to heat exchange in counterflow mode with cold air; after cooling, the ore agglomerate with a temperature of less than 135 "С is unloaded onto a belt conveyor by numerous unloading trays, evenly distributed near the bottom of the mine, by an electric vibrating feeder 2, for transportation outside; waste gas with a temperature above 586 "С inside the cooling mine is discharged to a gravity dust collector on top of the cooling mines for primary dedusting.

For the drive devices of the said rotary distributor, air compressor, electric vibrating feeder 1 and electric vibrating feeder 2, variable frequency control is used to guarantee the stability of the loading level inside the vertical cooling shaft, as well as the cooling efficiency and uniformity of the hot ore agglomerate.

The submitted application describes a processing system using a vertical cooling shaft - that is, a mine cooler, respectively, a cooling shaft of a mine cooler - for the disposal of waste heat of ore agglomerate, which includes a vertical cooling shaft and a gravity dust collector, which are connected in series according to the technological route, and the receiving the tray is placed above the inlet channel for hot ore agglomerate on top of the specified vertical cooling shaft; the single-roll crusher after the sintering unit is connected to the receiving tray through the tray, the electric vibrating feeder 1 and the chain bucket conveyor or chevron conveyor; the distributor is connected near the bottom of the receiving tray through a rotating distribution device; the rotating distribution device includes the body of the distribution device, the rotating distribution chute and the drive motor device; the rotating distribution chute can be placed obliquely inside the housing of the distribution device; the top of the rotating distribution chute is placed on the upper edge of the housing of the distribution device and is connected to the drive motor device for actuation; the lower part of the rotating distribution chute is placed in the middle above the distributor; that is set in motion by the drive motor device, the rotating distribution chute rotates around the central axis of the vertical refrigerating shaft; the distributor includes a drum in the upper part and numerous emptying trays evenly distributed along the circumference of the lower part; the emptying tray is a conical structure extending downwards, and its discharge end is located near the upper space of the vertical refrigerating shaft; the outlet channel of the central air duct and the outlet channel of the ring air duct are located near the bottom of the vertical refrigerating shaft; numerous discharge channels of the annular duct are located along the outer edge of the vertical cooling shaft; the central duct and the ring duct are connected by an air compressor through an air hose, respectively; numerous unloading trays, evenly distributed along the circle, located near the bottom of the vertical cooling shaft; the lower part of the output tray is connected to the belt conveyor; the outlet channel for waste gas from the top of the vertical cooling shaft is connected to the gravity dust collector. The dust discharge channels of the said gravity dust collector, the bag type dust collector and the waste heat recovery boiler are connected by a chain scraper conveyor, respectively.

The bodies of the specified tray, receiving tray, rotating distribution chute, distributor and unloading tray are made of plates of boiler steel or heat-resistant stainless steel; linings are provided or not provided as required, and are made of manganese alloy steel plates with high abrasion resistance or refractory materials.

The inner wall of the specified vertical refrigerating shaft above the outlet channel of the annular duct is lined, and the lining includes an inner working layer and an outer insulating layer; the inner working layer is made of refractory bricks, and the outer insulating layer is formed of heat-resistant sprayed materials; the lining is supported by a heat-resistant support frame.

The specified chain bucket conveyor or chevron conveyor is equipped with a hermetic heat-protective coating.

Said drive motor device includes one, two or more motors, symmetrically placed on the upper edge of the housing of the distribution device; the toothed crown is placed on the upper edge of the housing of the distribution device; driven by a motor or motors, the ring gear rotates and meshes with a gear wheel located on top of the rotating distribution chute to drive the rotating distribution chute along the upper edge of the distributor housing and to cause rotation of the rotating distribution chute about the central axis of the vertical cooling shaft . The number of specified emptying trays and unloading trays is, for example, six, respectively.

Compared with the prototype, the following beneficial effects are achieved: 1) a new vertical cooling mine is used to cool the ore agglomerate, which can ensure uniform distribution of material particles inside the mine; good stability of the loading level inside the mine, as well as sufficient and uniform cooling of the hot ore improves the degree of recovery of the waste heat of the ore agglomerate, to the highest level; good overall sealing can improve the workplace environment.

Brief description of the drawings

Fig. 1 schematically shows, as an example, a view in a longitudinal section of a device for cooling bulk material with a loading device for introducing bulk material into a container according to the invention.

Fig. 2 schematically shows, as an example, a perspective view in section of the loading device according to the invention of Fig. 1.

Fig. 3 represents a technological diagram of a processing method using a vertical cooling shaft for the recovery of waste heat of ore agglomerate in the presented invention.

Fig. 4 represents an image of the construction of the facade of the vertical refrigerating shaft in the presented invention.

Fig. 5 represents an enlarged fragment of the drawing in FIG. 4.

Fig. 6 is a top view of the distributor.

Description of variants of implementation of the invention

Example

Figure 1 shows a view in a longitudinal section of the loading device 1 according to the invention for the introduction of bulk material 2 into the refrigerating shaft From the mine refrigerator 4. Because the loading device 1 is a part of the device 5 for cooling the bulk material. The loading device 1 is placed at the upper end of the refrigerating shaft 3.

The bulk material 2, in this case hot agglomerate with different particle sizes, is fed by means of a conveyor device - in this case a chevron conveyor 6, but could also be any other type of conveyor device suitable for transporting hot agglomerate - and fed into a rotating hopper 8 through the inlet 7, placed in the center in the middle.

The rotating hopper 8 can rotate around the vertical, central axis 9 indicated by a dotted line - as shown by two curved arrows. In the example shown, the central axis of rotation coincides with the longitudinal axis of the cooling shaft 3, respectively, of the shaft cooler 4, and passes through the inlet opening 7. From the outlet opening 10 shifted relative to the center in the rotating hopper 8, the loose material 2 is poured into the stationary storage hopper 11. In rotating hopper 8 shows the contour of the cushion of loose material that exists during operation; inclined towards the outlet opening 10. Three stationary downpipes 12a, 120, 12c depart from the supply hopper 11. They are conical pipes, the wider end of which - the shaft end - opens into the cooling shaft 3. With its narrower end - the supply end - they are connected to the supply hopper 11.

The mine cooler 4 includes, in addition to the refrigerating mine 3, a compressor 13 for injecting cooling air, supply pipelines 14 for cooling air, outlet pipelines 15 for heated cooling air. Cooling air - represented by a transparent shaped arrow - is introduced from below into the cooling shaft 3, flows through the layer 16 of loose material in the cooling shaft in a counterflow mode, and is discharged to the outside near the upper end of the cooling shaft C in the form of heated cooling air - as represented by a shaded curved arrow.

The rotary hopper 8 and the feed hopper 11 are located outside the cooling shaft 3.

A layer 16 of material is formed in the refrigerating shaft Z, as the loose material 2 is poured from the stationary feed hopper 11 through the downpipes 12a, 125, 12c into the refrigerating shaft 3. In the refrigerating shaft Z, the contour of the material layer 16 is shown. Loose material 2 passes through the cooling shaft C in the material layer 16 from the mountain to the bottom under the influence of gravity. Near the lower end of the cooling shaft C cooled bulk material

Zo is being unloaded. In Figure 1, the image of other parts of the device 5 for cooling, for example, discharge devices for removing the cooled bulk material from the cooling shaft, has been omitted for the sake of clarity.

Fig. 2 shows an enlarged perspective view in section of the combination of the rotary hopper 8, the feed hopper 11 and the downpipes 12a, 1260, 12c in the loading device 1 according to FIG. 1 of the invention. The rotating hopper 8 can rotate around the vertical central axis 9 of rotation, as shown by the curved arrow. Its inlet hole 7 is located in the center in the middle, its outlet hole 10 is located offset relative to the center. The central axis of rotation 9 passes through the inlet 7. Below the rotating hopper 8 is a stationary feed hopper 11. Three stationary downpipes 12a, 1265, 12b depart from the feed hopper 11.

Specific embodiments of the present application are further described below in conjunction with Figures 3-6.

As shown in Fig. 3, the processing method using a vertical refrigerating mine for the recovery of waste heat of ore agglomerate in the presented invention includes the following stages: 1) Hot ore agglomerate with a temperature above 700 "C, formed in the sintering device 17, falls on an inclined tray 18, which was crushed by by means of a single-roll crusher 19, fed to a chain bucket conveyor 20 by means of an electric vibrating feeder 1 21, and then rises into a vertical refrigerating shaft 22 - that is, a refrigerating shaft, respectively, a refrigerating shaft of a mine cooler; the upper part of the vertical refrigerating shaft 22 is equipped with a rotating distribution device 23 and the distributor 24, and the distributor 24 includes numerous emptying trays 25, evenly distributed along the circle of the vertical cooling shaft 22; the ore agglomerate is discharged from the front of the chain bucket conveyor 20 and enters the rotating distributor 23 through the receiving tray 2 6; the rotating distribution device 23 distributes materials along the circle of the distributor 24; emptying trays 25 are used to form a pillow and evenly distribute the hot ore agglomerate along the cross section of the vertical cooling shaft 22; the cold air inside the vertical refrigerating shaft 22 is pumped by an air compressor and exits from the exhaust channel 28 of the central air duct and the exhaust channel 29 of the annular air duct, which are located near the bottom of the vertical refrigerating shaft 22, in order to ensure the uniformity of the distribution of cold air inside the vertical refrigerating shaft 22;

In the vertical refrigerating shaft 22, the ore agglomerate is subjected to heat exchange in counterflow mode with cold air; after cooling, the ore agglomerate with a temperature of less than 135 C is unloaded onto the belt conveyor 30 by numerous unloading trays 31, evenly distributed near the bottom of the mine, and by an electric vibrating feeder 2 32, for transportation outside; waste gas with a temperature higher than 5867 inside the mine is discharged to the gravity dust collector 33 from the mountain of the mine for primary dedusting. The dust from the dust collector 33 after settling is transported outside by the chain scraper conveyor 34 together with the dust collected in the gravity dust collector 33.

For the drive devices of the said rotary distributor 23, air compressor, electric vibrating feeder 1 21 and electric vibrating feeder 2 32, variable frequency control is used to guarantee the stability of the loading level inside the vertical cooling shaft 22, as well as the cooling efficiency and uniformity of the hot ore agglomerate.

As shown in fig. With and Fig. 4, the processing system using a vertical cooling shaft for the utilization of the waste heat of the ore agglomerate, to implement the indicated processing method includes a vertical cooling shaft 22, a gravity dust collector 33, which are connected in series according to the technological route, and the receiving tray 26 is placed above the inlet channel for hot ore agglomerate from above the specified vertical cooling shaft 22; the single-roll crusher 19 after the sintering unit 17 is connected to the receiving tray 26 through the tray 18, the electric vibrating feeder 1 21 and the chain bucket conveyor 20; as shown in Fig. 3, the distributor 24 is attached to the lower part of the receiving tray 26 through a rotating distributor device 23; the rotating distribution device 23 includes the housing 35 of the distribution device, the rotating distribution chute 36 and the drive motor device 37; the rotating distribution chute 36 is placed obliquely inside the housing 35 of the distribution device; the top of the rotating distribution chute 36 is placed on the upper edge of the housing 35 of the distribution device and is connected to

With a drive motor device 37 for actuation; the lower part of the rotating distribution chute 36 is placed in the middle above the distributor 24; driven by the drive motor device 37, the rotary distribution chute 36 rotates around the central axis of the vertical refrigerating shaft 22; the distributor 24 includes a drum 38 in the upper part and numerous emptying trays 35, evenly distributed along the circumference of the lower part; the emptying tray 25 is a conical structure extending downward, and its outlet end is located near the upper space of the vertical refrigerating shaft 22; the outlet channel 28 of the central air duct and the outlet channel 29 of the ring air duct are located near the bottom of the vertical refrigerating shaft 22; numerous outlet channels 29 of the annular duct are located along the outer edge of the vertical cooling shaft 22; the central duct and the ring duct are connected to the air compressor through an air hose, respectively; numerous unloading trays 31, evenly distributed along the circle, placed near the bottom of the vertical refrigerating shaft 22; the lower part of the unloading tray 31 is connected to the belt conveyor 30. The outlet channel of numerous unloading trays 31 on the vibrating feeder 32 is provided with a dust cover 39.

The air compressor 27 pumps cooling air into the layer of loose material. The outlet channel for waste gas from the top of the vertical cooling shaft 22 is connected to the gravity dust collector 33; there is also a pipeline for high-temperature waste gas after the gravity dust collector 33. The dust discharge channels of the specified gravity dust collector 33 are connected to the chain scraper conveyor 34.

The bodies of the specified tray 18, receiving tray 26, rotating distribution chute 36, distributor 24 and unloading tray 31 are made of plates of boiler steel or heat-resistant stainless steel; linings are provided or not provided as required, and are made of manganese alloy steel plates with high abrasion resistance or refractory materials.

The inner wall of the specified vertical refrigerating shaft 22 above the outlet channel 29 of the ring duct is equipped with a lining, and the lining includes an inner working layer and an outer insulating layer; the inner working layer is made of refractory brick 40, and the outer insulating layer is formed of heat-resistant sprayed materials; because the lining is supported by a heat-resistant support frame.

The specified chain bucket conveyor 20 is equipped with a hermetic heat-protective coating.

The specified drive motor device 20 includes two motors symmetrically placed on the upper edge of the housing 35 of the distribution device; the toothed crown is placed on the upper edge of the housing 35 of the distribution device; driven by the motor, the ring gear rotates and is engaged with a gear wheel located on top of the rotating distribution chute 36 to drive the rotating distribution chute 36 along the upper edge of the distributor housing 35 and to allow rotation of the rotating distribution chute 36 about a central vertical axis refrigerating shaft 22. The number of specified emptying trays 25 and unloading trays 31 is six, respectively.

The above content represents only preferred embodiments of the presented invention, but the scope of legal protection of the presented invention is not limited to this; within the scope of the technical field disclosed in the presented invention, equivalent replacements or changes made according to the technical scheme and concept of the presented invention by any specialist familiar with the technical field should be included in the scope of legal protection of the presented invention.

List of items referred to 1 loading device 2 loose material

C refrigerating shaft 4 shaft cooler 5 device for cooling loose material 6 chevron conveyor 7 inlet 8 rotary hopper 9 central axis of rotation 10 outlet hole 11 feed hopper 12a, p, c downpipe

From 13 compressor 14 inlet pipelines 15 discharge pipelines 16 material layer 17 sintering unit 35 18 tray 19 single-roll crusher 20 chain bucket conveyor 21 electric vibrating feeder 1 22 vertical refrigerating shaft 40 23 rotary distribution device 24 distributor 25 emptying tray 26 receiving tray 27 air compressor 45 28 discharge channel of the central air duct 29 discharge channel of the ring air duct belt conveyor 31 discharge tray 32 electric vibrating feeder 2 50 33 gravity dust collector 34 chain scraper conveyor distributor housing 36 rotating distribution chute 37 drive motor device 55 38 drum 39 fireproof dust cover

Sources of information: (510) avgo71139А

CsM2046303950

СсМ2046303960Й

CMm1032343618

SmM204495075

CMm201310127744.5

СМе93117175

SmM201310672967

CMm201511002240.6,

SmM201320185479.1

SmM201520756682.9

CMm201310127744.5

СМе93117175.

SmM201310672967

CMm201220491407.5

CMm201610150596.2

SmM200910074513.6

СМе93117175

SmM201320185290.2

SmM201520756682.9

SmM201520756682.9

CMm201310127797.7

CMm201320185480.4

СМе93117175

CMm201511002240.6

SmM201320814396.4

CMm201310128026

SmM201320814379.0

СмМ201520756682.9 201511002240.6

Co., Ltd.) CM200910074513.6

СМе93117175

Claims (8)

FORMULA OF THE INVENTION 1. A device for cooling the bulk material (2) consisting of particles with different particle sizes, while the bulk material (2) is a hot agglomerate that has a temperature of at least 300 "C, which includes a shaft cooler (4) with a REFRIGERATOR shaft (3), and a loading device (1) for loading loose material (2) into the mine cooler (4), and the loading device (1) includes: - a rotating hopper (8), made with the possibility of rotation around the central axis (9) of rotation , which has an inlet (7) for loose material (2), through which the central axis (9) of rotation passes, and which has an outlet (10) for loose material (2), and the outlet (10) is offset from the center - feed hopper (11), into which the outlet opening (10) of the rotary hopper (8) opens; - at least three down pipes (12a, 1265, 12c) protruding from the feed hopper (11); and the feed hopper (11) and downpipes (12a, 125, 12c) are ner by ears; and at the same time, the loading device (1) is located at the upper end of the cooling shaft (3) of the shaft cooler (4), and the downpipes (12a, 12b, 12c) open with their lower ends into the cooling shaft (3), and the rotating hopper (8) ) and the feed hopper (11) are located outside the cooling shaft (3). 2. A cooling device according to claim 1, which is characterized in that the loose material (2) has a temperature of at least 400 °C. 3. The cooling device according to claim 1, which is characterized in that the pipelines that supply the cooling gas are placed around the circle and in the center in the cooling shaft (3) with annular and central air discharge channels (29, 28). 4. A cooling device according to claim 1, which is characterized by the fact that the cross-section of the downpipe (12a, 1265, 12c) becomes larger as the distance from the feed hopper (11) increases. 5. The cooling device according to claim 1, which is characterized by the fact that a drive motor device (37) for the rotating hopper (8) is provided, and a toothed crown is placed on the upper edge of the rotating hopper (8) for driving the rotating hopper (8) into rotation. 6. The cooling device according to claim 3, which is characterized by the fact that the inner wall of the cooling shaft (3) of the shaft cooler (4) is provided with a lining above the annular air outlet channel. 7. The method, preferably continuous, of introducing the loose material (2), consisting of particles with different particle sizes, into the refrigerating shaft (3) of the mine cooler (4), while the loose material (2) is a hot agglomerate that has a temperature at least 300 s, where the bulk material is first fed into the center of the rotating hopper (8), which rotates around the central axis (9) of rotation, then eccentrically poured from the rotating hopper (8) into the stationary feed hopper (11), and then from the stationary feed hopper (11) through fixed downpipes (12a, 12p, 12c) are poured into the refrigerating shaft (3) of the shaft cooler (4). 8. The method according to claim 7, which differs in that the loose material (2), which is a hot agglomerate, has a temperature of at least 400 "С. : i i Ya shlia SI : ! I ; g uh N su shen Y ! she i- de z EI varian also g i Yara ze i ! pnia shk i i i s I ! si i TK she hi I KK. I i i N Bk i I | | | ! u i dbonno | i ; I nai i i i Oi du i « : sh-g DI x, i i i ih U tekzhyuu i t 2 5 Fig. 1