JP2020507008A - Cooling bulk materials - Google Patents

Abstract

A dosing device (1) for introducing a bulk material (2) into a container, wherein the rotating bunker (8) is rotatable about a central rotation axis (9), the rotating bunker (8) comprising: It has an inlet opening (7) for the bulk material (2), the center axis of rotation (9) passes through the inlet opening (7), and the rotating bunker (8) is for the bulk material (2). A rotating bunker (8) and a supply bunker (11) having a discharge opening (10), the discharge opening (10) being eccentrically arranged, the discharge opening (10) of the rotating bunker (8). Comprises a supply bunker (11) opening into the supply bunker (11) and at least three drains (12a, 12b, 12c) exiting from the supply bunker (11), the supply bunker (11) and the drainage. Tubes (12a, 12b, 12c) are fixed, dosing device (1)

Description

  The present invention relates to a dosing device for introducing bulk material consisting of particles having different particle sizes into a container, preferably into a shaft cooler.

  Hot bulk material, such as sintered iron ore from a sintering plant, typically needs to be cooled before it can be stored in a silo and / or further processed.

  For the cooling of hot bulk material, it is known to use a cooling device with a cooling shaft, which is traversed by a cooling gas countercurrent to the bulk material during operation, a so-called shaft cooler. In such a shaft cooler, heat exchange between the hot bulk material and the cooling gas takes place in the cooling shaft. Hot bulk material is typically introduced into the cooling shaft at the upper end and traverses down the cooling shaft by gravity, and at the lower end of the cooling shaft, the bulk material is removed in a cooled state. The cooling gas is usually introduced at the lower end of the cooling shaft and is discharged above in the heated state as so-called exhaust gas. When the cooling gas is air, it is called cooling air and exhaust air. When cooling the bulk material, efforts are made to avoid cooling the non-uniform, each spatially non-homogeneous, bulk material. If, after passing through the cooling shaft, the bulk material has areas that are only slightly cooled and thus have a high temperature, such hot material may be, for example, downstream of the conveyor and / or cooling device. It can damage silos for storing bulk materials. In addition, in such cases, further transport and / or further processing of the bulk material may be delayed as it is first necessary to wait until the region of the bulk material has cooled sufficiently.

  In order to achieve the best possible and efficient cooling in the cooling shaft, the bulk material should be as homogeneous as possible in terms of particle size in the cooling shaft, i.e. as much as possible in the case of bulk materials with different particle sizes. There should be no separation and distribution. The inhomogeneous distribution of the particle sizes within the cooling shaft results in varying degrees of flow resistance of the cooling gas and, therefore, less well-flowed and less-cooled areas compared to other areas. In addition, large particles cool more slowly than small particles because their surface area to volume ratio is less favorable. If the bulk material contained within the cooling shaft has regions where the concentration of large particles is above average, in those regions the bulk material will be slower than in regions where the concentration of large particles is average or below average. And cool. As such, it is therefore advantageous to achieve uniform cooling of the bulk material in the cooling shaft if the bulk material grains are spatially homogeneously distributed with respect to their size in the cooling shaft. is there.

  In shaft coolers such as those described in US Pat. Nos. 5,079,089, 5,81,867, 6,459,867, the introduction of hot sinter as bulk material is carried out batchwise or centrally. This segregates the high temperature sinter with very large grain bands, usually with a grain size of up to 200 mm, and the cooling becomes inefficient.

  In U.S. Pat. No. 6,037,086, a dosing device for bulk material is shown, but it is unclear whether its separation performance is applicable to high temperature sinter cooling in a shaft cooler.

  Even if already separated bulk material is delivered for dosing, it is possible with the help of continuous dosing by moving the dosing device when it is introduced into the cooling shaft. Attempts are made to achieve a particle distribution within the shaft that is as homogeneous as possible. The problem is that the transfer system is exposed to the high temperatures of the bulk material and the heated cooling gas. This can result in significant wear and maintenance costs.

  The temperature of the high temperature sinter from the sintered ore is around 400 ° C. to 750 ° C., and the temperature of the cold ore feeds the blast furnace, and the ring and belt coolers have their structural characteristics. Therefore, only about 30% of the exhaust gas heat can be recovered, and the vertical cooling shafts, ie, the shaft coolers, the respective cooling shafts of the shaft coolers can improve the heat recovery rate, and so much Scientific research institutions and companies currently use vertical cooling shafts to recover the waste heat of sintered ore. For example, one set of vertical cooling shaft equipment, such as Sintering Furnace Type Cooling Device of Patent Document 6, Vertical Agglomerate Cooling Machine of Patent Document 7, Vertical Cooling and Waste Heat Recovery Furnace for Agglomerate of Patent Document 8, is Tianjin Tianfeng Steel. It is already in operation at Co., Ltd., which greatly improves waste heat recovery.

  The tightness of the vertical cooling shaft determines the exhaust gas recovery and its air leak points are mainly the feeding system and the exhaust system. At present, the feeding mode for the vertical cooling shaft is a material distribution of a diagonal bridge and an umbrella shape (Patent Document 9, Multi-angle Multi-surface Multi-layer 360-degree Air-supplying Sinter Ore Cooling Tower), a chain scraper Conveyor + rotating material distribution (Patent Document 10, Heat Exchange Device for Sintering Ore Furnace Type Cooling), Patent Document 11, Sensible Heat Recovery Device for Agglomerate, direct connection with the discharge end of the sintering machine + clock-type / umbrella-shaped material Includes dispensing (Patent Document 6, Sintering Furnace Type Cooling Device), Patent Document 7, Vertical Agglomerate Cooling Machine, Patent Document 8, Vertical Cooling and Waste Heat Recovery Furnace for Agglomerate. Although it is bucket chipping, the airtightness of the upper part of the shaft is not as good as continuous operation of the chain scraper and head rolling discharge. The feeding mode, which is in direct contact with the discharge end of the sintering machine, has great limitations on the height arrangement of the sintering machine and on the vertical shaft in the previous procedure.

  At present, the general discharge mode of the vertical cooling shaft is a star discharging machine (Patent Document 12, High-efficient Heat Recovery Type Sinter Mine Cooling System), Patent Document 13, System Used for Sinter Ore Cooling. and Sensible Heat Efficient Recycling, Patent Document 14, Vertical Sinter Cooler Capable of Efficiently Recovering Sensible Heat of Agglomerate, Electric Vibration Feeder (Patent Document 7, Vertical Agglomerate Cooling Machine), Electric Vibration Quantification Discharger + Rotary Discharge Valve (Patent Document 15) , Discharging Device of Sinter Cooling Furnace) (Patent Document 11, Sensible Heat Recovery Device for Agglomerate). The sintered ore entering the vertical cooling shaft has a requirement for particle size not too small, star / rotary discharge equipment has good airtightness, but material extrusion requires that the granular material The electric vibratory feeder does not have a material crushing condition, but the appropriate height of the sealing material column should be taken into account .

The heat recovery of the vertical cooling shaft is related to the solid-gas heat exchange conditions, and the material distribution and ventilation mode are important. At present, the material distribution mode for the vertical cooling shaft is rotating material distribution (Patent Document 11, Sensible Heat Recovery Device for Agglomerate, Patent Document 16, Rotary Feeding Device of Sinter Cooling Furnace), vertical screw type feeding machine. And watch-type material distribution (Patent Document 17, Suspension Type Distributing Device for Sintering Ore Cooling Furnace, Patent Document 7, Vertical Agglomerate Cooling Machine, Patent Document 9, Multi-angle Multi-surface Multi-layer 360-degree Air-supplying Sinter Ore Cooling Tower, Patent Document 18, Feeding Device for Vertical Cooling and Waste Heat Recovering Furnace for Sintering Ore), and the like. The ventilation mode includes a number of air chamber arrangements for surrounding the blower (Patent Literature 19, Sintered Ore Cooling Furnace) and a central blower (Patent Literature 20, Cold Air Supplying Device for Vertical Cooling and Waste Heat Recovering Furnace for Sintering Ore). ), A combination of center (multilayer umbrella type) and surrounding (air ring) blowing (Patent Document 11, Sensible Heat Recovery Device for Agglomerate), louver ventilation grid (Patent Document 9, Multi-angle Multi-surface Multi-layer) 360-degree Air-supplying Sinter Ore Cooling Tower), peripheral arrangement of many ventilation fans (Patent Document 14, Vertical Sinter Cooler Capable of Efficiently Recovering Sensible Heat of Ag)
glomerate), (Patent Document 7, Vertical Agglomerate Cooling Machine), and the like. Existing material dispensing equipment distributes large particles onto the rim by changing the material stocking angle to improve the distribution and a uniform distribution of material on the cross section of the shaft cannot be achieved. The ventilation mode uses a combination of peripheral and central blowing, which is suitable for vertical shafts with large sized sections and may ensure uniform and sufficient contact between cold air and material.

  In summary, existing vertical cooling shafts generally have problems such as poor air tightness and uneven distribution of materials, which results in poor on-site environment, high exhaust temperatures, and cold recovered exhaust gases. And has a direct effect on the operation of the discharge transport equipment, and the heat recovery and heat value, so that the economic benefits generated are not good and the equipment maintenance costs are high.

China Registered Utility Model No. 204633095 Chinese Registered Utility Model No. 20463396 Chinese Patent No. 103234361 China Registered Utility Model No. 2044995075 UK Patent Application Publication No. 20711139 Chinese Patent Application No. 20131127744.5 Chinese Patent Application No. 93117175. Issue X Chinese Patent Application 2013106772967. Issue X Chinese Patent Application No. 20151112240.6 Chinese Patent Application No. 201321854799.1 Chinese Patent Application No. 2015207756682.9 Chinese Patent Application No. 201202491407.5 Chinese Patent Application No. 201610150596.2. Chinese Patent Application No. 200910074513.6 Chinese Patent Application No. 20132018290.2 Chinese Patent Application No. 201312177797.7 Chinese Patent Application No. 20132018480.4 Chinese Patent Application No. 20132184139.64 Chinese Patent Application No. 201311028026. Issue X Chinese Patent Application No. 20132184137.00

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a dosing device, a device for cooling bulk material, and a method for introducing bulk material into a container, which reduces wear experienced by using continuous dosing. Uniform cooling of a bulk material composed of particles of various sizes can be achieved and improved.

The object is solved by a dosing device for introducing a bulk material consisting of particles having various particle sizes into a container,
This input device is
A rotating bunker rotatable about a central axis of rotation, the rotating bunker having an inlet opening for bulk material, the central axis of rotation passing through the inlet opening, and the rotating bunker being adapted to rotate the bulk material; A rotating bunker having a discharge opening for the eccentrically disposed discharge opening;
A supply bunker, wherein the discharge opening of the rotating bunker opens into the supply bunker;
-At least three drains from the supply bunker;
Including
The supply bunker and the drain are fixed.

  The container is preferably a cooling shaft of a shaft cooler. The shaft cooler has at least one cooling shaft. Shaft coolers, each cooling shaft typically having a vertical longitudinal axis.

  The bulk material is preferably hot, ie, has a temperature of at least 300 ° C., preferably at least 400 ° C., preferably it is a high temperature sinter. As already mentioned in the introduction, the temperature of the bulk material is reduced in the shaft cooler by countercurrent heat exchange with the cooling gas, and the bulk material is hot when introduced into the shaft cooler. . For example, the sinter, when introduced, may have a temperature ranging from 400C to 700C, or even up to 750C.

  Bulk material consists of particles of various particle sizes, which can result in a very large particle size spectrum, for example during sintering, with a particle size of up to 200 mm.

  A bunker is to be understood as a large container for receiving bulk goods and, in the present case, bulk material.

  The rotating bunker is rotatable about a central axis of rotation, which is typically vertical for installation of the dosing device in a container, such as the cooling shaft of a shaft cooler. The rotating bunker is rotated about this axis of rotation while the dosing device is activated. The axis of rotation passes through the entrance opening of the rotating bunker for bulk material. For example, the inlet opening of the rotating bunker for bulk material is centrally located, ie in the center, in which case the central axis of rotation passes through this centrally located inlet opening. Through the inlet opening, the bulk material transported to the input device by a transport device, for example in the case of a sinter such as a bulk material, by a chevron conveyor is introduced into the rotating bunker. Due to the fact that the central axis of rotation passes through the inlet opening (for example, in the case of a central arrangement of the inlet opening), when the rotating bunker rotates around its central axis, during actuation, , Do not change the position of the inlet opening. This facilitates input from the transport device into the rotating bunker.

  The rotating bunker has an eccentrically arranged discharge opening.

  The eccentric discharge opening of the rotating bunker opens into a fixed supply bunker located adjacent to the rotating bunker. Preferably, the dosing device is aligned with a rotating bunker located above the feed bunker in order to use gravity to move the bulk material.

  When the dosing device is installed in the container, for example in the cooling shaft of a shaft cooler, the rotating bunker is positioned above the supply bunker such that the bulk material advances from the rotating bunker according to gravity into the supply bunker. The central axis of rotation of the rotary bunker does not pass through the eccentrically arranged discharge opening.

  The eccentric discharge opening of the rotating bunker can be, for example, an eccentrically arranged hole in the bottom of the rotating bunker. During operation, according to gravity, the bulk material passes from the rotating bunker through a discharge opening into a supply bunker located below the rotating bunker.

  The supply bunker has its name because it supplies bulk material for subsequent input through a drain into a container such as the cooling shaft of a shaft cooler. The feed bunker is stationary and, unlike a rotating bunker, it does not move while the input device is activated.

  From the supply bunker, at least three so-called drainage starts. In the case of dosing devices installed on the cooling shaft of a container, for example a shaft cooler, their drains extend downward from the supply bunker, ie they are located below the supply bunker. The drain is the tube through which the bulk material leaves the supply bunker according to gravity and the bulk material flows out of the drain. The end of the drain connected to the supply bunker may be referred to as the supply end, and the other end of the drain may be referred to as the shaft end.

  Preferably, the cross section of the drainage tubes increases as the distance from the supply bunker increases, so that the drainage tubes increase as the distance from the supply bunker increases. This reduces the risk of clogging.

  For example, a conical tube is connected to the supply bunker as a drain with a narrower end, the supply end.

  Through an opening in the bottom of the supply bunker, the bulk material flows according to gravity into a drain provided at a corresponding point on the bottom of the supply bunker. Preferably, the drainage is of a supply bunker such that in the event that the drainage is clogged, bulk material in the supply bunker above the clogged drainage can at least largely flow through another drainage. Located at the bottom.

  For example, if the dosing device is operated in conjunction with a shaft cooler, the drains extend into the cooling shaft of the shaft cooler with their lower, potentially wider ends, and during operation the material Exits this potentially wider, end of the drain, eg, a potentially conical tube, into the cooling shaft of the shaft cooler. During operation, bulk material will flow out of the supply bunker, through the drain, and into the cooling shaft according to gravity. The material bed of the bulk material so formed is flushed with countercurrent cooling gas, preferably cooling air.

  During operation of the dosing device, the rotating bunker is rotated about the central axis of rotation, while the bulk material is introduced into the rotating bunker, preferably through a centrally located inlet opening, so that the rotating bunker is rotated from the transport device. Bulk material separation phenomena that occur during transfer into the bunker are mitigated. As an example, particles dropped from a conveyor belt will fly to varying degrees depending on their size, i.e., they are separated and by rotating a rotating bunker, the particle size distribution in the rotating bunker is then reduced. Will be equalized.

  During the operation of the input device, the rotary bunker is rotated, while the feed bunker is stationary and the discharge openings are arranged eccentrically, so that the bulk material is, according to gravity, rotationally symmetric rotary bunker. From the feed bunker installed below the rotating bunker. Thus, when bulk material from the feed bunker flows into the drain, the drain is filled with bulk material of approximately the same particle size distribution from the feed bunker, which is a container such as the cooling shaft of a shaft cooler. The heterogeneous particle size distribution within is extremely minimized, especially in the circumferential direction. Evacuation of bulk material is desirable due to the potentially increasing cross-sectional area of the cannula. Inside the container, e.g. the cooling shaft of a shaft cooler, a bulk material cone is formed at the lower end of the discharge tube, the use of a single discharge tube, e.g. with the central input of bulk material in the container, e.g. the cooling shaft. In comparison, corn is not very high in the presence of multiple cannulae. As a result, the radial separation around each bulk material cone is reduced compared to a higher bulk material cone. For an effective effect compared to a single cannulation, at least three cannulations should be present.

  Overall, in combination, the inventive features of the active dosing device synergistically have the following effects: In the case of the supply of the separated bulk material to the inlet opening of the dosing device, for example in a chevron conveyor supplying the sinter, even if a separation effect has already occurred, it is associated with a container, for example a shaft cooler Within the cooling shaft of the dosing device, there is a particle size distribution of the bulk material which is practically homogeneous both radially and circumferentially and is rotationally symmetric with respect to the longitudinal axis of the cooling shaft of the container, for example a shaft cooler. I do.

  The separation effect is equalized over the cross section of the floor of the bulk material formed in the container, for example the cooling shaft.

  When used in devices for cooling bulk materials, the advantages are improved cooling efficiency, uniform and effective cooling of the bulk material, and good heat yield for subsequent use of heated cooling gas. Occurs.

  The dosing device of US Pat. No. 6,059,056 is at its top with a rotary device, referenced 3, which has an eccentrically arranged discharge opening for the bulk material, and Inlet opening differs from the claimed dosing device in that the central axis of rotation does not pass. Material introduction is not central. Thus, the separation mechanism, and consequently the cooling capacity and uniformity, differs from the dosing device as claimed.

Another purpose of this application is to
A device for cooling a bulk material composed of particles of various particle sizes,
A shaft cooler having a cooling shaft;
A charging device according to the invention for charging bulk material into a shaft cooler;
Including
The dosing device is located at the upper end of the cooling shaft of the shaft cooler, the drains are open at their lower end into the cooling shaft, and the rotating bunker and the supply bunker are located outside the cooling shaft for cooling. Device.

  In the cooling shaft, the hot bulk material is cooled by a cooling gas passing countercurrent to the bulk material.

  In such a device for cooling bulk material, the rotating bunker and the supply bunker are outside the cooling shaft and are therefore not exposed to the heated cooling gas present in the cooling shaft, especially at the upper end. Heat is supplied to the rotating bunker and the supply bunker by hot bulk material, which are also cooled by ambient air. The external arrangement of the cooling shaft reduces the risk of heat-related damage, which can be particularly large with respect to moving parts, for example, rotating bunker. The drainage of the stationary components opens at their lower ends, ie the shaft ends, into the cooling shaft, from which the bulk material flows into the cooling shaft.

  The device for cooling bulk material according to the invention, or the dosing device according to the invention, is preferably operated continuously, ie the bulk material is introduced continuously.

  The cooling shaft is preferably designed at least partially axially symmetric. The cooling shaft preferably includes a hollow cylindrical shaft portion. Thereby, the cylindrical axis of the hollow cylindrical shaft part is advantageously vertically aligned.

  Preferably, the cooling shaft is an air-cooled heat exchanger. Advantageously, the device for cooling the bulk material comprises at least one fan, in particular a blower, for injecting a cooling gas, for example cooling air, into the cooling shaft. Further, the device for cooling bulk material may have at least one fan at the upper end of the cooling shaft for drawing cooling air exiting from the cooling shaft.

  The cold gas, respectively cold air, which blows into the cooling shaft, respectively the bulk material bed inside the cooling shaft, must be distributed as uniformly as possible. For this purpose, the cooling air exits from the central air outlet of the air duct, also called the supply line, and the annular air outlet of the air duct, also called the supply line, which is provided at the bottom of the cooling shaft, inside the vertical cooling shaft. Ensures uniform distribution of cold air. The cooling gas supply line comprises an annular air outlet and a central air outlet around and centrally on the cooling shaft. The cooling air is more evenly distributed compared to only the annular air outlet or only the central air outlet.

  According to one variant with an electric vibratory feeder, the cooled bulk material is discharged to a belt conveyor by a number of discharge chutes distributed evenly at the bottom of the shaft. Preferably, the outlet of the discharge chute on the vibrating feeder comprises a dust cover.

  In a preferred variant, a drive motor device for the rotating bunker is provided, and a gear ring is provided on the upper edge of the rotating bunker, respectively, on the rotating bunker body. The drive motor device may include one, two, or more motors at the upper edge of the rotating bunker, each symmetrically disposed on the rotating bunker body. Driven by one or more motors, the gear ring rotates and drives and rotates a rotating bunker. One or more motors are located on the outside of the shaft, in areas that do not receive intense heat. This arrangement reduces the risk of heat-related failures.

  In a preferred variant, the rotary distribution device, the air blower, the drive device of the electric oscillating feeder uses variable frequency control to stabilize the charge level inside the vertical cooling shaft of the shaft cooler, and the high temperature sintering. Cooling adequacy and uniformity of the ore are guaranteed.

  In a preferred variant, the inner wall of the cooling shaft of the shaft cooler is provided with a lining above the annular air outlet. The lining includes an inner working layer and an outer insulating layer, the inner working layer is constructed of refractory bricks, and the outer insulating layer is formed by a refractory spray, and the lining is supported by a refractory support frame. .

Another object of the invention is
A method for introducing, preferably continuously, a bulk material consisting of particles of various particle sizes into a container, preferably into a cooling shaft of a shaft cooler,
The bulk material is first fed centrally into a rotating bunker rotating about a central axis of rotation, then eccentrically flows out of the rotating bunker into a fixed supply bunker and then from a fixed supply bunker. It flows through a fixed drain into the container, preferably into the cooling shaft of the shaft cooler.

  With respect to feeding in the center, this is understood so that the bulk material is fed through an opening through which the central axis of rotation passes. The center axis of rotation is preferably vertical.

  In such a process control, preferably using the dosing device according to the invention, or the device for cooling bulk material according to the invention, the advantageous effects already discussed in the discussion of the dosing device and the device for cooling bulk material are obtained. Can be achieved.

  The text of the present application describes a process method and system that uses a vertical cooling shaft to recover the waste heat of a sintered ore, and a novel vertical cooling shaft, ie, a shaft cooler, for cooling the sintered ore. The use of each cooling shaft of a shaft cooler can improve the waste heat recovery of the sintered ore and maximize the manufacturing environment.

The following technical scheme is used.
A process method that uses a vertical cooling shaft, i.e., a shaft cooler, a cooling shaft of a shaft cooler, to recover waste heat of a sintered ore, also referred to as a sintered product for short. Including, process method.
1) The high-temperature sintered ore having a temperature exceeding 400 ° C. generated by the sintering machine is crushed by a single-roll crushing machine and then dropped into a chute, and is dropped on a chain bucket conveyor or a chevron conveyor by an electric vibration feeder 1. Delivered and then lifted as a bulk material to the vertical cooling shaft, i.e. the cooling shaft of the shaft cooler, the upper part of the vertical cooling shaft being a rotating distribution device which is a rotating bunker according to the language used earlier in this application. Thus, for a rotating distribution device, a rotating bunker body, which may be later referred to as a distribution device body, may be defined, and for a rotating distribution device, a rotation, which may be later referred to as a rotating distribution gutter. A rotary distribution device and a distributor that can define a bunker space. According to the language previously used in this application, including a supply bunker and a drain, the supply bunker may later be referred to as a barrel, and the drain may later be referred to as a blanking chute. A dispenser comprising a plurality of blanking chutes distributed preferably and uniformly around the perimeter of the vertical cooling shaft, wherein the sintered ore comprises a chain bucket conveyor or a chevron conveyor. Ejected from the head and into the rotary dispensing device via a receiving chute, which distributes the material around the perimeter of the distributor, the blanking chute empties the supply bunker, and the vertical cooling The cool air used to distribute the high-temperature sintered ore uniformly over the cross section of the shaft and used as a cooling gas inside the vertical cooling shaft is empty. Is provided by the blower, exits from the center air duct outlet and the annular air duct outlet provided at the bottom of the vertical cooling shaft, also called the supply line, to ensure distribution uniformity of the vertical cooling shaft inside the cool air.
2) In a vertical cooling shaft, the sintered ore bulk material undergoes countercurrent heat exchange with cold air, and after cooling, a large number of sintered ores having a temperature of less than 135 ° C. are evenly distributed at the bottom of the shaft. Exhaust gas discharged to the belt conveyor by the discharge chute and the electric vibratory feeder 2 for conveying outward and having a temperature exceeding 586 ° C. inside the cooling shaft is sent from the upper part of the cooling shaft to the gravity precipitator for primary dust removal. Is discharged.

  The drive device of the rotary distribution device, the air blower, the electric oscillating feeder 1 and the electric oscillating feeder 2 uses variable frequency control to stabilize the charge level inside the vertical cooling shaft and to sufficiently cool the high-temperature sintered ore. Guarantees uniformity and uniformity.

  The present application is a process system that uses a vertical cooling shaft, i.e., a shaft cooler, a respective cooling shaft of a shaft cooler, to recover waste heat of the sintered ore, and continuously connects according to the process path. A vertical cooling shaft and a gravity precipitator, a receiving chute is provided above the high temperature sintering ore inlet at the top of the vertical cooling shaft, and a single roll crusher after the sintering machine includes a chute. Connected to the receiving chute via the electric oscillating feeder 1 and a chain bucket conveyor or a chevron conveyor, the distributor is connected at the bottom of the receiving chute via a rotary distribution device, the rotary distribution device comprises a distribution device body, a rotary distribution A gutter, and a drive motor device, wherein the rotating distribution gutter is provided obliquely inside the distribution device body. Often, the top of the rotating distribution gutter is located at the upper edge of the distribution device body and is connected with a drive motor device for driving, the bottom of the rotation distribution gutter is centrally located above the distributor and the driving motor Driven by the device, the rotating distribution gutter rotates around the central axis of the vertical cooling shaft, and the distributor provides a number of blanking chutes distributed evenly along the barrel at the top and at the bottom at the bottom. The blanking chute has a downwardly extending conical structure, and its discharge end is provided in the upper space of the vertical cooling shaft, and the central air duct outlet and the annular air duct outlet are provided in the vertical cooling shaft. At the bottom, a number of annular air duct outlets are provided along the outer edge of the vertical cooling shaft, and the central air duct and the annular air duct are each empty. A number of discharge chutes connected to the air blower via a hose and distributed evenly around the periphery are provided at the bottom of the vertical cooling shaft, and the bottom of the discharge chutes is connected to the belt conveyor to provide vertical cooling. The exhaust system outlet at the top of the shaft describes a process system connected to a gravity precipitator. The gravity dust collector, the bag type dust collector, and the dust outlet of the waste heat boiler are each connected to a chain scraper conveyor.

  The main body of the chute, the receiving chute, the rotating distribution gutter, the distributor and the discharge chute are made of a boiler steel plate or a heat-resistant stainless steel, and the lining is provided or not provided as necessary, and a high wear manganese alloy. Made of steel plate or refractory material.

  The inner wall of the vertical cooling shaft above the annular air duct outlet comprises a lining, the lining includes an inner working layer and an outer insulating layer, the inner working layer is constructed by firebrick, and the outer insulating layer is The lining is formed by a refractory spray and the lining is supported by a refractory support frame.

  The chain bucket conveyor or chevron conveyor has a sealed thermal protection cover.

  The drive motor device includes one, two, or more motors symmetrically disposed on an upper edge of the dispensing device body, wherein a gearing is provided on the upper edge of the dispensing device body and one or Driven by a plurality of motors, the gear ring rotates and meshes with a gear disposed on top of the rotating distribution gutter to drive the rotating distribution gutter to move along the upper edge of the distribution device body; The rotation of the rotating distribution gutter around the central axis of the mold cooling shaft is realized. The number of the blanking chute and the number of the discharge chute are, for example, 6 respectively.

The following beneficial effects occur compared to the prior art.
1) The novel vertical cooling shaft is used to cool the sintered ore, which can achieve a uniform distribution of the material particles inside the shaft, good stability of the charge level inside the shaft and Sufficient and uniform cooling of hot ore maximizes waste heat recovery of the sintered ore, and good overall tightness can improve the manufacturing environment.

FIG. 2 is a schematic view showing, by way of example, a longitudinal section of a device for cooling bulk material with a dosing device for introducing bulk material into a container according to the invention; FIG. 2 schematically shows, by way of example, a perspective view of a section through the dosing device according to the invention from FIG. 1. 3 is a flowchart of a process method using a vertical cooling shaft to recover waste heat of a sintered ore according to the present invention. It is a front structure figure of a vertical cooling shaft in the present invention. It is the elements on larger scale of FIG. It is a top view of a distributor.

(Example)
FIG. 1 shows a longitudinal section of a dosing device 1 according to the invention for introducing bulk material 2 into a cooling shaft 3 of a shaft cooler 4. The charging device 1 is part of a cooling device 5 for bulk material. The charging device 1 is arranged at the upper end of the cooling shaft 3. The bulk material 2 (in this case, a high-temperature sinter having various particle sizes) is a transport device (in this case, a chevron conveyor 6), which is also suitable for transporting the high-temperature sinter. And may be fed into a rotating bunker 8 through a centrally located inlet opening 7 in the center.

  The rotating bunker 8 is rotatable about a vertical dash-dotted rotation center axis 9 as indicated by the two curved arrows. In the example shown, the central axis of rotation coincides with the cooling shaft 3, respectively the longitudinal axis of the shaft cooler 4, and passes through the inlet opening 7. From a discharge opening 10 eccentrically arranged in a rotating bunker 8, the bulk material 2 flows into a fixed storage bunker 11. In the rotating bunker 8, the profile of the material cushion of the bulk material present during use is shown, inclined towards the discharge opening 10. Three fixed drainage pipes 12a, 12b, 12c start from the supply bunker 11. These drains are conical tubes, the wider ends of which, ie the shaft ends, open into the cooling shaft 3. At their narrower end, the supply end, they are connected to a supply bunker 11.

  The shaft cooler 4 includes, in addition to the cooling shaft 3, a blower 13 for blowing cooling air, a supply line 14 for cooling air, and a discharge line 15 for heated cooling air. The cooling air, represented by the transparent block arrows, is introduced into the cooling shaft 3 below, flows countercurrently in the cooling shaft through the material bed 16 of the bulk material and is heated and filled. It is discharged at the upper end of the cooling shaft 3 as cooling air represented by block arrows.

  The rotating bunker 8 and the supply bunker 11 are arranged outside the cooling shaft 3.

  The bulk material 2 flows from the fixed supply bunker 11 through the drain pipes 12a, 12b, 12c into the cooling shaft 3, so that the material bed 16 builds up in the cooling shaft 3. The profile of the material bed 16 is shown in the cooling shaft 3. The bulk material 2 passes through the cooling shaft 3 in the material bed 16 from top to bottom according to gravity. At the lower end of the cooling shaft 3, the cooled bulk material is discharged. In FIG. 1, the presentation of the discharge device for discharging the cooled bulk material from other parts of the cooling device 5, for example from the cooling shaft, has been omitted for clarity.

  FIG. 2 shows the combination of the rotating bunker 8, the supply bunker 11 and the drains 12a, 12b, 12c in the dosing device 1 according to the invention from FIG. The rotating bunker 8 is rotatable about a vertical axis of rotation 9 as indicated by the curved arrow. The inlet opening 7 is centrally located at the center and the outlet opening 10 is eccentrically arranged. The rotation center axis 9 passes through the entrance opening 7. Below the rotary bunker 8, a fixed supply bunker 11 is arranged. From the supply bunker 11, three fixed drainage tubes 12a, 12b, 12c start.

  Specific embodiments of the present application are further described below in combination with FIGS.

As shown in FIG. 3, in the present invention, the process method using the vertical cooling shaft to recover the waste heat of the sintered ore includes the following steps.
1) The high-temperature sintered ore having a temperature exceeding 700 ° C. produced by the sintering machine 17 is crushed by a single-roll crushing machine 19, then dropped into a chute 18, and is chain-conveyed by an electric vibration feeder 121. 20 and then lifted up to a vertical cooling shaft 22, i.e. a shaft cooler, the respective cooling shaft of the shaft cooler, on top of the vertical cooling shaft 22, a rotary distribution device 23 and a distributor 24. And the distributor 24 includes a number of blanking chutes 25 distributed evenly around the perimeter of the vertical cooling shaft 22, the sintered ore is discharged from the head of the chain bucket conveyor 20, and The rotation distribution device 23 enters the rotation distribution device 23 via the receiving chute 26, and the rotation distribution device 23 Distributing material around the perimeter of the distributor 24, a blanking chute 25 is used to blank the cushion and distribute the hot sinter ore uniformly over the cross-section of the vertical cooling shaft 22; Cool air inside the cooling shaft 22 is provided by an air blower 27 and exits through a central air duct outlet 28 and an annular air duct outlet 29 provided at the bottom of the vertical cooling shaft 22, and cool air inside the vertical cooling shaft 22 is provided. Guarantee the uniformity of distribution.

  In the vertical cooling shaft 22, the sintered ore performs countercurrent heat exchange with cold air, and after cooling, the sintered ore having a temperature of less than 135 ° C. is distributed to the bottom of the shaft in a number of discharges. Exhaust gas discharged to the belt conveyor 30 by the chute 31 and the electric vibratory feeder 232 for outward transport and having a temperature exceeding 586 ° C. inside the shaft is subjected to gravity collection from the upper portion of the shaft for primary dust removal. Is discharged to the vessel 33. The dust collected from the dust collector 33 together with the dust collected in the gravity dust collector 33 is transported outward by a chain scraper conveyor 34.

  The driving device of the rotary distribution device 23, the air blower, the electric vibrating feeder 121 and the electric vibrating feeder 2 32 is for the stability of the charge level inside the vertical cooling shaft 22, and the cooling adequacy and uniformity of the high temperature sintered ore. Use variable frequency control to ensure

  As shown in FIGS. 3 and 4, the process system using a vertical cooling shaft to recover the waste heat of the sintered ore to realize the process method is continuously connected according to the process path. A vertical cooling shaft 22, a gravity precipitator 33, and a receiving chute 26 is provided above the high-temperature sintering ore inlet at the upper part of the vertical cooling shaft 22, and is provided in a single roll after the sintering machine 17. The crusher 19 is connected to the receiving chute 26 via the chute 18, the electric vibration feeder 121 and the chain bucket conveyor 20, and the distributor 24 is connected to the receiving chute via the rotary distribution device 23 as shown in FIG. Connected at the bottom of 26, the rotary distribution device 23 comprises a distribution device body 35, a rotary distribution gutter 36 and a drive motor device 37, 36 is provided obliquely inside the distribution device main body 35, and the upper part of the rotary distribution gutter 36 is located at the upper edge of the distribution device main body 35 and is connected to a drive motor device 37 for driving. The bottom is centrally located above the distributor 24 and is driven by a drive motor device 37 so that the rotating distribution gutter 36 rotates around the central axis of the vertical cooling shaft 22 and the distributor 24 And a plurality of blanking chutes 25 distributed evenly around the periphery at the bottom, the blanking chutes 25 are conically shaped to extend downward, and the discharge end thereof has a vertical cooling. A central air duct outlet 28 and an annular air duct outlet 29 are provided in the space above the shaft 22, and are provided at the bottom of the vertical cooling shaft 22 so that a number of annular air ducts An outlet 29 is provided along the outer edge of the vertical cooling shaft 22, and the central air duct and the annular air duct are each connected to an air blower via an air hose, and are distributed uniformly around the circumference. The discharge chute 31 is provided at the bottom of the vertical cooling shaft 22, and the bottom of the discharge chute 31 is connected to the belt conveyor 30. The outlets of the multiple discharge chutes 31 on the vibrating feeder 32 are provided with dust covers 39.

  Air blower 27 pumps cooling air into the bulk material bed. The exhaust gas outlet at the top of the vertical cooling shaft 22 is connected to a gravity dust collector 33, and there is also a hot exhaust gas pipe after the gravity dust collector 33.

  The dust outlet of the gravity dust collector 33 is connected to a chain scraper conveyor 34.

  The main body of the chute 18, the receiving chute 26, the rotary distribution gutter 36, the distributor 24, and the discharge chute 31 are made of a boiler steel plate or a heat-resistant stainless steel, and a lining is provided or not provided as necessary. And made of a high wear manganese alloy steel plate or a refractory material.

  The inner wall of the vertical cooling shaft 22 above the annular air duct outlet 29 is provided with a lining, the lining includes an inner working layer and an outer insulating layer, the inner working layer is constructed of refractory brick 40, and the outer insulating layer Is formed by a refractory spray material and the lining is supported by a refractory support frame.

  The chain bucket conveyor 20 includes a hermetic heat protection cover.

  The drive motor device 37 includes two motors symmetrically arranged on the upper edge of the dispensing device body 35, and the gearing is provided on the upper edge of the dispensing device body 35 and is driven by the motor to drive the gearing Rotates and meshes with the gears located above the rotating distribution gutter 36 to drive the rotating distribution gutter 36 to move along the upper edge of the distribution device body 35 and to move the center of the vertical cooling shaft 22. The rotation of the rotation distribution gutter 36 about the axis is realized. The number of the blanking chutes 25 and the number of the discharge chutes 31 are each six.

  What has been described above is merely a preferred embodiment of the present invention, however, the scope of protection of the present invention is not limited thereto, and is disclosed in the present invention, which is performed by those skilled in the art according to technical schemes and concepts of the present invention. Equivalent replacements or modifications within the technical scope of the present invention fall within the protection scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Input device 2 Bulk material 3 Cooling shaft 4 Shaft cooler 5 Device for cooling bulk material 6 Chevron conveyor 7 Inlet opening 8 Rotation bunker 9 Rotation center axis 10 Discharge opening 11 Supply bunker 12a, 12b, 12c Drainage 13 Blower 14 Supply Line 15 discharge line 16 material floor 17 sintering machine 18 chute 19 single roll crusher 20 chain bucket conveyor 21 electric vibration feeder 1
Reference Signs List 22 Vertical cooling shaft 23 Rotary distribution device 24 Distributor 25 Blanking chute 26 Receiving chute 27 Air blower 28 Center air duct outlet 29 Annular air duct outlet 30 Belt conveyor 31 Discharge chute 32 Electric vibration feeder 2
33 Gravity dust collector 34 Chain scraper conveyor 35 Distribution device main body 36 Rotating distribution gutter 37 Drive motor device 38 Barrel 39 Dust cover 40 Fire brick

Claims (15)

An input device (1) for introducing a bulk material (2) composed of particles having various particle sizes into a container,
The input device (1)
A rotating bunker (8) rotatable about a central axis of rotation (9), said rotating bunker (8) having an inlet opening (7) for said bulk material (2); A central axis (9) passes through the inlet opening (7) and the rotating bunker (8) has an outlet opening (10) for the bulk material (2), the outlet opening (10). Is an eccentrically arranged rotating bunker (8),
A supply bunker (11), wherein the discharge opening (10) of the rotary bunker (8) opens into the supply bunker (11);
-At least three drains (12a, 12b, 12c) exiting from the supply bunker (11);
Including
The feeding device (1), wherein the supply bunker (11) and the drainage pipes (12a, 12b, 12c) are fixed.   The charging device (1) according to claim 1, wherein the container is a cooling shaft (3) of a shaft cooler (4).   The dosing device (1) according to claim 1, characterized in that the bulk material (2) has a temperature of at least 300C, preferably at least 400C.   The charging device (1) according to claim 1, wherein the bulk material (2) is a high-temperature sinter.   The charging device (1) according to claim 1, characterized in that the cross section of the drainage tubes (12a, 12b, 12c) increases as the distance from the supply bunker (11) increases. A device for cooling a bulk material (2) comprising particles of various sizes,
A shaft cooler (4) comprising a cooling shaft (3);
A charging device (1) according to any one of the preceding claims for charging a bulk material (2) into a shaft cooler (4);
Including
The dosing device (1) is disposed at an upper end of the cooling shaft (3) of the shaft cooler (4), and the drainage pipes (12a, 12b, 12c) have lower ends of the cooling pipes (12a, 12b, 12c). 3) The device for cooling, characterized in that it opens into the interior and the rotary bunker (8) and the supply bunker (11) are arranged outside the cooling shaft (3).   The cooling device according to claim 6, characterized in that the bulk material (2) has a temperature of at least 300C, preferably at least 400C.   The cooling device according to claim 6, wherein the bulk material (2) is a high-temperature sinter.   Cooling device according to claim 6, characterized in that the cooling gas supply line comprises an annular air outlet (29) and a central air outlet (28) around and at the center of the cooling shaft (3).   A drive motor device (37) for the rotating bunker (8) is provided, and a gearing is provided on the upper edge of the rotating bunker (8) to drive rotation of the rotating bunker (8). The cooling device according to claim 6, wherein:   The cooling device includes an air blower (27) and an electric vibration feeder (21, 32), and a driving device of the rotation distribution device (23), the air blower (27), the electric vibration feeder (21, 32) includes: 7. The cooling device according to claim 6, wherein variable frequency control is used.   The cooling device according to claim 9, characterized in that an inner wall of the cooling shaft (3) of the shaft cooler (4) is provided with a lining above the annular air outlet. A method for introducing, preferably continuously, a bulk material (2) comprising particles of various sizes into a container, preferably a cooling shaft (3) of a shaft cooler (4),
The bulk material is first fed centrally into a rotating bunker (8) rotating about a central axis of rotation (9) and then eccentric from said rotating bunker (8) into a fixed supply bunker (11). From the fixed supply bunker (11) and then into the container through fixed drains (12a, 12b, 12c), preferably the cooling of the shaft cooler (4). The method characterized by flowing out into the shaft (3).   14. The method according to claim 13, wherein the bulk material (2) has a temperature of at least 300C, preferably at least 400C.   14. The method according to claim 13, wherein the bulk material (2) is a high temperature sinter.

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