Vertical cooling furnace with uniform material distribution, rectification, material loosening and uniform air distribution functions

Abstract

The utility model relates to a vertical cooling furnace with uniform material distribution, rectification, material loosening and uniform air distribution functions. The vertical cooling furnace comprises a material distribution unit, a furnace chamber, a material loosening unit, a rectification unit, a forced heat exchange unit, an air distribution unit and a material discharge unit, the utility model aims to provide a vertical cooling furnace with functions of rectifying, loosening materials and uniformly distributing air so as to break through the existing technical bottlenecks as follows: 1) the segregation distribution of the materials in the vertical cooling furnace is serious; and 2) the flow integrity of materials in the vertical cooling furnace is poor. And 3) the materials in the vertical cooling furnace are stacked too compactly. And 4) the distribution uniformity of cold air in the vertical cooling furnace is poor. The vertical cooling device can simultaneously have the functions of changing material segregation in the vertical cooling device, promoting the materials to flow in a whole flow mode, reducing the material stacking compaction degree, evenly distributing air and the like, and cooperative operation of material flow and energy flow is achieved in the gas-solid heat exchange process.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery process equipment in metallurgical industry, and particularly relates to a vertical cooling furnace with the functions of uniform material distribution, rectification and loose material distribution and uniform air distribution. Background Art

[0002] The sintering process contains huge waste heat resources. Efficient recovery of sintered ore sensible heat is one of the important means for steel enterprises to achieve energy conservation and consumption reduction. Vertical cooling is a new process proposed by scholars to efficiently recover sintered ore sensible heat, which is currently in the engineering test stage. This process uses a closed vertical cooling furnace as cooling equipment. Hot sintered ore enters from the top of the furnace body, and cooling air enters from the air supply device at the bottom of the furnace body. The cooling of the sintered ore and sensible heat recovery are achieved through countercurrent heat exchange between the sintered ore and the cooling air.

[0003] The material layer height in the vertical cooling furnace is usually 4 to 6 times that of the ring cooling layer height. In addition, the sintered ore has a high density, reaching 1600 to 2000 kg / m 3 , which results in the vertical cooling material layer being tightly packed and having poor air permeability. At the side wall of the furnace chamber, due to the large porosity when the particles are in contact with the wall, a side wall effect is produced, causing a large amount of cold air to escape from near the wall and unable to be evenly distributed in the material layer. In addition, the particle size range of the high-temperature sintered ore entering the vertical cooling furnace reaches 0-150mm, with a significant wide particle size distribution characteristic, which is very easy to produce sintered ore particle size segregation, reduce the uniformity of the porosity distribution of the material layer, further deteriorate the distribution of cold air in the furnace, and reduce the gas-solid heat exchange efficiency. At present, the design of the vertical cooling furnace type usually draws on the dry quenching furnace, but the unreasonable setting of the half-top angle of the conical section often leads to the existence of a flow dead zone when the sintered ore material layer moves downward in the vertical cooling furnace, destroying the integrity of the downward movement of the material, affecting the orderly entry of high-temperature sintered ore into the furnace and the discharge of low-temperature sintered ore, resulting in the inability of material flow and energy flow to coordinate, becoming another bottleneck restricting the improvement of gas-solid countercurrent heat exchange efficiency. It can be seen that adjusting the material segregation distribution and flow pattern, loosening the material layer stacking density, and uniform air distribution are the improvement direction and inevitable requirements for improving the gas-solid heat exchange efficiency of the vertical cooling furnace.

[0004] At present, the relevant patents and known technical documents about vertical cooling furnace are as follows:

[0005] Patent No. CN 109990612 A, Application Publication Date: July 9, 2019, Utility Model Creation Name: A vertical device for sintered ore with "integral flow" classification and utilization of waste heat. In this application, the lower end of the discharge hopper shrinks inward, and its half-apex angle is α<45-φ / 2. Where φ is the inclination angle of the sintered ore sliding on the slope of the discharge port, generally 25°. The size of the discharge port at the lower end of the discharge hopper and the discharge shear stress are determined by the formula L / A=τ / ρg. The meaning of each parameter is detailed in this application. A cone is also inserted above the discharge port to make the material flow "integral flow". In addition, this application also uses a cross feeding structure to achieve uniform distribution. However, the size of the discharge port in this application requires measurement of multiple sets of parameters to be determined, and the operation is relatively complicated. Although it involves the use of cones to control the material to flow in "integral flow", this application does not involve how to distribute the air evenly.

[0006] Patent No. CN 108955276 A, Application Publication Date: December 7, 2018, Utility Model Creation Name: Vertical Sintered Ore Cooler with Rotary Distributor and Sintered Ore Cooling Method. In this application, a rotary distributor is used, in conjunction with an umbrella-shaped chute and a vertical chute, to form a uniform annular stockpile in the cooling section. In addition, an annular air duct is provided, corresponding to 6 to 12 air duct branches. Corresponding to the air duct, a plurality of discharge cone hoppers are also provided. However, a "mountain"-shaped stockpile will still be formed under the distribution pipe of this application, which will still lead to the phenomenon of large particles enriched on the side walls and small particles enriched in the center. In addition, multiple rows of hoppers cannot effectively solve the integrity of the downward movement of the sintered ore, and will still lead to the generation of accumulated materials.

[0007] It can be seen that in the existing patents on vertical cooling, adjusting material segregation, improving material flow and optimizing cold air distribution are often separated, and it is impossible to improve the distribution and flow of materials and cold air at the same time. In order to improve the gas-solid heat exchange efficiency, it is necessary to develop a vertical cooling furnace that can simultaneously improve material segregation, promote the flow of materials in "bulk flow", reduce the density of material stacking, and evenly distribute air, so as to achieve the coordinated operation of material flow and energy flow. Utility Model Content

[0008] The utility model provides a vertical cooling furnace with the functions of uniform material distribution, rectification, loosening of materials and uniform air distribution, so as to break through the following existing technical bottlenecks: serious material segregation distribution in the vertical cooling furnace. Poor integrity of material flow in the vertical cooling furnace. Too dense accumulation of materials in the vertical cooling furnace. Poor uniformity of cold air distribution in the vertical cooling furnace. The utility model can simultaneously have the functions of improving material segregation in vertical cooling equipment, promoting the flow of materials in "overall flow", reducing the density of material accumulation, and uniform air distribution, so as to realize the coordinated operation of material flow and energy flow in the gas-solid heat exchange process.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A vertical cooling furnace with uniform distribution, rectification, loosening and uniform air distribution functions, comprising a distribution unit, a furnace cavity, a hood, a wind beam and a discharge unit, wherein the distribution unit is arranged at the upper end of the furnace cavity, the discharge unit is arranged at the bottom of the furnace cavity, the hood is in the middle and lower part of the furnace cavity, and the bottom of the hood is connected to the wind beam; it is characterized in that the lower part of the distribution unit is a truncated cone-shaped distributor with upper and lower ends opened, the end of the cone distributor with a larger cross-sectional area is connected to the furnace cavity and placed in the furnace cavity, and a circular gas escape port is formed between the cone distributor and the furnace cavity; a plurality of cross beams are arranged on horizontal cross sections at different heights in the furnace cavity to loosen the gas. The hood comprises at least two layers of hoods connected up and down by wind tubes, the upper side wall of the uppermost hood is a hyperbolic hood wall, and the corresponding furnace cavity inner wall is a hyperbolic furnace wall wall, the hyperbolic furnace wall wall and the hyperbolic hood wall are of the same height, and shrink towards each other at a constant and the same shrinkage rate, forming a hyperbolic hopper in space; the lower part of the uppermost hood is a vertical hood wall, and the corresponding furnace cavity inner wall is a vertical furnace wall wall, and the vertical hood wall and the vertical furnace wall wall are of the same height; the furnace cavity inner wall corresponding to the wind tube and having the same height is a gradually expanding furnace wall, and the horizontal distance between the wind tube and the gradually expanding furnace wall gradually increases.

[0011] A cone is installed at the middle part of the crossbeam loosener on the uppermost layer.

[0012] A plurality of layers of fins are arranged circumferentially on the outer surface of the cone.

[0013] The angle between the wall surface of the conical distributor and the horizontal plane is greater than the accumulation angle of the material to be cooled, and is 45° to 70°, preferably 60°.

[0014] The cross beam looseners are evenly arranged along the material layer height, in 2 to 5 layers, preferably 3 layers, and the cross beam looseners in each layer are arranged in a "cross" or "M" shape; the cross beams of the cross beam looseners in two adjacent layers cannot overlap in the height direction, but are staggered by 22.5° to 45°, preferably 45°.

[0015] The initial angle of the hyperbolic furnace wall surface and the hyperbolic hood wall surface is 50° to 70°, preferably 57°.

[0016] The outlet width of the hyperbolic hopper is 6 to 10 times, preferably 8 times, the maximum particle size of the material to be cooled.

[0017] The air outlet direction of the hood is set to be vertically downward, or inclined downward.

[0018] The discharge unit comprises a cone bucket and a discharge pipe. The cone bucket is connected to the bottom of the furnace cavity, and the discharge pipe is connected to the lower end of the cone bucket.

[0019] The wind beam is a cross wind beam, which is installed in the cone bucket and is used to connect and fix the wind hood and is connected to the wind hood.

[0020] The material distribution unit also includes a storage bin and a material discharge pipe. The material discharge pipe is connected to the end of the conical distributor with a small cross-sectional area, and the storage bin is fixed to the upper end of the material discharge pipe.

[0021] Compared with the existing technology, the beneficial effects of the utility model are:

[0022] 1) The gradually expanding wall of the conical distributor can effectively limit the rolling of materials toward the side walls, so that the materials inside can only move downward according to the downward movement of the materials in the vertical cooling furnace chamber, effectively alleviating the phenomenon of large particle enrichment on the side walls of the furnace chamber and small particle enrichment in the center of the furnace chamber, making the material more evenly distributed in the furnace chamber, thereby reducing the segregation of material particle size, making the material distribution more uniform, and also conducive to improving the uniformity of the air permeability of the material layer, so that the cooling air is evenly distributed in the material layer.

[0023] 2) On the one hand, the beam loosener can bear part of the pressure of the upper material, reducing the density of the material below it, which is conducive to the entry of cooling air. On the other hand, an empty area filled with materials will be formed below the beam loosener, which is conducive to introducing cooling air into the empty area, thereby improving the distribution of cooling air in the material layer.

[0024] 3) The hyperbolic wall makes the cross section of the material moving downward have a constant shrinkage rate, so that the material sliding force near the wall is always greater than the wall friction force, thereby avoiding the flow dead zone formed by the poor downward movement of the material near the wall, and promoting the material flow form to be "integrated flow". Under this flow situation, all the materials in the furnace cavity are flowing. The acceleration of the material flow is achieved through the contraction of the wall surface, while the obstruction of the wall surface on the downward movement of the material near it is avoided. It is conducive to making full use of the entire furnace cavity volume and avoiding the waste of cooling air caused by the ineffective cooling zone. In addition, it can also adjust the furnace condition, which is conducive to the smooth operation of the furnace condition.

[0025] 4) The hyperbolic wall and the vertical, gradually expanding wall below it change the cross-sectional area of ​​the material layer, which not only accelerates the material and cooling air, thereby improving the gas-solid heat exchange efficiency, but also makes the cooling air distribution more uniform by reducing the cross-sectional area, thereby improving the gas-solid contact heat exchange. In addition, when the material passes through this area, it will move horizontally while moving downward, which means that the material will be redistributed in this area to achieve material flow reformation.

[0026] 5) Multiple layers of hoods are set along the height direction of the material layer. The upper hood is located in the center of the upper material layer. On the one hand, the air inlet of the upper hood can arrange the cooling air in the center of the material layer, making the cooling air distribution in the furnace cavity more uniform, thereby increasing the gas-solid contact heat exchange area of ​​the material layer in the furnace. On the other hand, the air supply of the upper hood directly contacts the high-temperature material in the middle and upper part of the vertical cooling furnace, resulting in a large gas-solid temperature difference, which is also conducive to improving the gas-solid heat exchange efficiency. In addition, the hood itself is equivalent to the role of a fluid changer, which can reduce the downward movement speed of the material in the center area of ​​the furnace cavity, and is also conducive to improving the integrity of the downward movement of the material.

[0027] 6) The utility model can comprehensively improve the distribution segregation of the material to be cooled, promote the "bulk flow" flow of the material to be cooled, reduce the packing density of the material to be cooled, and realize uniform air distribution, thereby promoting the coordinated operation of the material flow and the energy flow, and strengthening the dynamic conditions of the gas-solid heat exchange, which not only improves the gas-solid heat exchange efficiency, but also ensures the smooth operation of the vertical cooling furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a vertical cooling furnace provided by the utility model with the function of rectifying loose materials and evenly distributing air.

[0029] Figure 2 It is a front view of a conical distributor of a vertical cooling furnace provided by the utility model.

[0030] Figure 3 The utility model is a front view of the arrangement position of the crossbeam loosener of the vertical cooling furnace provided by the utility model.

[0031] Figure 4 yes Figure 3 Top view of the .

[0032] Figure 5 It is a front view of a rectifier unit of a vertical cooling furnace provided by the utility model.

[0033] Figure 6 It is a front view of the forced heat exchange unit of the vertical cooling furnace provided by the utility model.

[0034] Figure 7 It is a front view of the hood of the vertical cooling furnace provided by the utility model.

[0035] In the figure: 101-storage bin; 102-feeding pipe; 103-conical distributor; 2-furnace cavity; 201-bellows; 202-air outlet; 3-crossbeam loosener; 301-upper loosener; 3011-conical body; 3012-fins; 302-middle loosener; 303-bottom loosener; 401-hyperbolic furnace wall surface; 402-hyperbolic hood wall surface; 501-vertical furnace wall surface; 502-vertical hood wall surface; 503-gradually expanding furnace wall surface; 504-wind tube; 6-hood; 601-cross wind beam; 602-upper hood; 603-lower hood; 7-discharge unit; 701-conical bucket; 702-discharge pipe. DETAILED DESCRIPTION

[0036] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. Based on the examples in the present invention, all other examples obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0037] See Figure 1-Figure 6 As shown, a vertical cooling furnace with uniform distribution, rectification, loosening and uniform air distribution functions includes a distribution unit, a furnace cavity 2, a hood 6, a wind beam 601, and a discharge unit 7. The distribution unit is arranged at the upper end of the furnace cavity 2, and the discharge unit 7 is arranged at the bottom of the furnace cavity 2. The hood 6 is in the middle and lower part of the furnace cavity 2, and the bottom of the hood 6 is connected to the wind beam 601; the lower part of the distribution unit is a truncated cone distributor 103 with openings at both ends, and the end of the cone distributor 103 with a larger cross-sectional area is connected to the furnace cavity 2 and placed in the furnace cavity 2, and a circular gas escape port is formed between the cone distributor 103 and the furnace cavity 2; a plurality of crossbeam looseners 3 are arranged on horizontal sections at different heights in the furnace cavity 2; the hood 6 includes a fan which is connected to the furnace cavity 2 by wind. At least two layers of wind hoods are connected up and down by the tube 504, the upper side wall of the uppermost wind hood is a hyperbolic wind hood wall 402, and the corresponding inner wall of the furnace cavity 2 is a hyperbolic furnace wall surface 401, the hyperbolic furnace wall surface 401 and the hyperbolic wind hood wall surface 402 are of the same height, and shrink toward each other from top to bottom at a constant and same shrinkage rate, forming a hyperbolic hopper in space; the lower part of the uppermost wind hood is a vertical wind hood wall 502, and the corresponding inner wall of the furnace cavity 2 is a vertical furnace wall surface 501, and the vertical wind hood wall surface 501 and the vertical furnace wall surface 502 are of the same height; the inner wall of the furnace cavity 2 corresponding to and having the same height as the wind tube 504 is a gradually expanding furnace wall surface 503, and the horizontal distance between the wind tube 504 and the gradually expanding furnace wall surface 503 gradually increases from top to bottom.

[0038] The beam looseners 3 are installed on horizontal sections at different heights and can be evenly arranged along the material layer height to form 2 to 5 layers of beam looseners 3, preferably 3 layers; the beams on each layer of beam looseners 3 are arranged in a "cross" or "M" shape; a cone 3011 is installed in the middle of the topmost beam loosener (upper loosener 301), and the cone 3011 is installed at the intersection of the topmost beam. The outer surface of the cone 3011 is arranged with several layers of fins 3012 along the circumferential direction, and the surface of the cone 3011 has steel plate fins 3012. The unloaded materials will accumulate between the steel plate fins 3012 to form a material abrasive structure to avoid the unloaded materials from causing wear on the surface of the cone 3011; the adjacent two layers of beams cannot overlap in the height direction, but are staggered at a certain angle; it can be 22.5° to 45°, preferably 45°.

[0039] The angle between the wall surface of the conical distributor 103 and the horizontal plane is greater than the accumulation angle of the material to be cooled, and is 45° to 70°, and the embodiment adopts an angle of 60°.

[0040] The initial angle (angle with the horizontal plane) of the hyperbolic furnace wall surface 401 and the hyperbolic hood wall surface 402 is 50° to 70°, preferably 57°.

[0041] The outlet width of the hyperbolic hopper is 6 to 10 times, preferably 8 times, the maximum particle size of the material to be cooled.

[0042] A rectifier unit (such as Figure 5 The vertical furnace wall surface 501, the vertical wind cap wall surface 502, the gradually expanding furnace wall surface 503 and the outer wall surface of the wind tube 504 constitute a forced heat exchange unit (as shown in FIG. Figure 6 As shown), the forced heat exchange unit is arranged below the rectifier unit.

[0043] The air outlet direction of the hood 6 is set to be vertically downward, or inclined downward.

[0044] The discharge unit 7 comprises a cone hopper 701 and a discharge pipe 702. The cone hopper 701 is connected to the bottom of the furnace chamber 2, and the discharge pipe 702 is connected to the lower end of the cone hopper 701. The cone hopper 701 can be designed as a conical or hyperbolic cone hopper.

[0045] The wind beam is a cross wind beam 601, which is installed in the cone bucket 701, and is used to connect and fix the wind hood 6 and is connected with the wind hood 6. The central wind hood 6 is installed on the cross wind beam 601; the cross wind beam 601 and the central wind hood 6 constitute an air distribution unit, and the cross wind beam 601 sends external cold air into the wind hood.

[0046] The crossbeams of the middle loosening device 302 and the bottom loosening device 303 are connected to the central hood 6 for fixing the central hood 6. The number of layers of the crossbeam loosening devices connected to the hood 6 is the same as the number of hoods.

[0047] The material distribution unit 1 includes a storage bin 101 and a material discharge pipe 102 . The material discharge pipe 102 is connected to an end of a conical distributor 103 with a small cross-sectional area, and the storage bin 101 is fixed to the upper end of the material discharge pipe 102 .

[0048] The storage bin 101 is arranged above the furnace chamber 2, and the feed pipe 102 is arranged below the storage bin 101. One end of the feed pipe 102 is connected to the storage bin 101, and the other end is connected to the conical distributor 103. The conical distributor 103 is in a truncated cone shape, with openings at both ends. The end with a small cross-sectional area is connected to the feed pipe 102, and the end with a large cross-sectional area has a bottom surface diameter smaller than the inner diameter of the furnace chamber 2, is placed in the furnace chamber 2 and is fixedly connected to the upper loosening device 301. The bottom diameter of the conical distributor 103 is smaller than the inner diameter of the furnace chamber 2, and the two differ by a certain distance, forming a circular ring material layer for cooling gas to escape.

[0049] The upper surface of the annular material layer is where the hot air escapes. There is a sealed space - wind box 201 - between the upper part of the annular material layer and the storage bin 101. Negative pressure is formed by inducing air, so that the hot air can only escape from the upper part of the annular material layer, and will not enter the conical distributor 103 and the storage bin 101. At the same time, there is a material blockage between the storage bin 101 and the annular material layer, which can also prevent cold air from entering the system through the storage bin 101 and the distribution device. After using the conical distributor 103, due to the obstruction of the wall, the large particles in the material cannot roll to the side wall, and can only move down gradually as the material below the conical distributor 103 moves down. Not only does it alleviate the phenomenon of large particles enriched on the side wall, but it can also distribute large particles to the central area of ​​the furnace chamber 2, effectively improving the segregation of material distribution.

[0050] The furnace chamber 2 is a vertical can-shaped structure, and the horizontal cross section can be circular or rectangular. A wind box 201 is provided at the upper part of the furnace chamber 2, and the wind box 201 is provided with an air outlet 202.

[0051] The central hood 6 can be supplied with air using an air supply duct alone, or it can be supplied with air using the same duct. In this case, the upper hood 602 should be provided with a resistance balancer to balance the cooling air pressure at the outlets of the upper and lower hoods. It is preferred that each hood is supplied with air independently; when the air is supplied independently, there is a sleeve inside the wind beam, which is divided into an inner layer and an outer layer. The inner layer supplies air to the upper hood, and the outer layer supplies air to the lower hood. The wind beam pipe and the hood air inlet pipe are connected separately. The inner and outer interfaces of the wind beam are respectively connected to the fan or the air supply regulating valve to adjust and control the air intake of the upper and lower hoods.

[0052] Example:

[0053] like Figure 1As shown, the beam loosening device 3 includes a series of horizontally arranged beams that form a loosening unit. In the embodiment, three layers of beam loosening devices 3 are arranged along the height direction of the material layer (see Figure 2 ). A cone 3011 is installed at the center of the upper crossbeam loosener 301, and a steel plate fin 3012 is arranged on the surface of the cone 3011 to form a material abrasive structure to reduce the wear of the material on the equipment. The two ends of the upper loosener 301 are respectively connected to the two opposite walls of the upper part of the furnace chamber 2, and the middle loosener 302 and the bottom loosener 303 are also required to be connected to the upper hood 602 and the lower hood 603. In the embodiment, the number of beams on each layer is 2, which are arranged in a "cross shape". The staggered angle of the two adjacent layers of beams along the height direction is 45°.

[0054] Placing the crossbeam inside the material layer can, on the one hand, support a portion of the weight of the upper material, reduce the pressure on the material below it, and improve the stacking density of the material below it; on the other hand, it can form a material-filled empty area under the crossbeam, which is conducive to introducing cooling air into the empty area, thereby improving the distribution of cooling air and increasing the gas-solid contact heat exchange area.

[0055] In this embodiment, the outer wall shape of the upper central wind hood 602 is provided with a hyperbolic wind hood wall 402 and a vertical wind hood wall 502, which spatially correspond to the hyperbolic furnace wall surface 401 and the vertical furnace wall surface 501, and the outer wall surface of the wind tube 504 at the lower end of the upper central wind hood 602 corresponds to the gradually expanding furnace wall 503.

[0056] The hyperbolic furnace wall surface 401 and the hyperbolic hood wall surface 402 are of the same height and correspond to each other, and are arranged in the middle of the furnace chamber 2 to form a rectifier unit. The initial angle of the hyperbolic furnace wall surface 401 and the hyperbolic hood wall surface 402 is 57°, and both shrink toward each other at a constant and identical shrinkage rate, forming a hyperbolic hopper in space. The outlet width of the hyperbolic hopper is 8 times the maximum particle size of the material to be cooled.

[0057] The hyperbolic hopper has a constant shrinkage rate as the height decreases, which means that the downward force on the material near the wall is always greater than the wall resistance, avoiding the accumulation of material on the hopper wall and helping the material to flow in a "bulk flow".

[0058] The forced heat exchange unit is arranged below the rectifying unit, and is composed of a vertical furnace wall surface 501 , a vertical wind cap wall surface 502 , a gradually expanding furnace wall surface 503 and a wind tube 504 wall surface.

[0059] The vertical furnace wall surface 501 and the vertical wind hood wall surface 502 have the same height and correspond to each other; the gradually expanding furnace wall surface 503 and the wind tube 504 wall surface have the same height, and the horizontal distance between the two gradually increases. The wind tube 504 wall surface can be vertical or gradually expanding in the opposite direction of the furnace wall surface.

[0060] In the forced heat exchange unit, the width of the material downward channel is the narrowest and gradually expands. For the cooling air, the gas is accelerated, and for the material, it is conducive to the gradual loosening of the material. The increase in gas flow rate is conducive to increasing the gas-solid heat exchange coefficient. The narrow material discharge channel is conducive to the uniform distribution of cooling air in the channel cross section and forced contact with the material for heat exchange.

[0061] In this embodiment, the cross wind beam 601 and the upper wind hood 602 and the lower wind hood 603 constitute an air distribution unit; the cross wind beam 601 is installed in the cone bucket 701 below the furnace chamber 2, which is used to connect with the external air supply duct and support the central wind hood 6. Two wind hoods 6 are set in the height direction; the air outlet direction of the upper wind hood 602 is set to be vertically downward, and the air outlet direction of the lower wind hood 603 is set to be inclined downward. The upper wind hood 602 and the lower wind hood 603 supply air separately. Multiple layers of wind hoods are set in the height direction, and the upper wind hood 602 can supply air from the central material layer where the cooling air is difficult to enter, which increases the uniformity of the cooling air distribution in the material layer. At the same time, the temperature difference between the air supply of the upper wind hood 602 and the upper sintered ore is large, which is also conducive to improving the gas-solid contact heat exchange efficiency.

[0062] In this embodiment, the discharge unit 7 includes a cone bucket 701 and a discharge pipe 702. One end of the cone bucket 701 is connected to the bottom of the furnace chamber 2, and the other end is connected to the discharge pipe 702. A vibrating feeder is also provided below the discharge pipe 702 for discharging the cooled material.

[0063] In this embodiment, the cone bucket 701 is designed to be a conical cone bucket.

Claims

1. A vertical cooling furnace with uniform distribution, rectification, loosening and uniform air distribution functions, comprising a distribution unit, a furnace cavity, a hood, a wind beam, and a discharge unit, wherein the distribution unit is arranged at the upper end of the furnace cavity, the discharge unit is arranged at the bottom of the furnace cavity, the hood is in the middle and lower part of the furnace cavity, and the bottom of the hood is connected to the wind beam; characterized in that: The lower part of the distribution unit is a truncated cone-shaped distributor with openings at both ends, the end of the cone distributor with a larger cross-sectional area is connected to the furnace cavity and placed in the furnace cavity, and a circular gas escape port is formed between the cone distributor and the furnace cavity; a number of beam looseners are arranged on horizontal cross sections at different heights in the furnace cavity; the hood includes at least two layers of hoods connected up and down by wind tubes, the upper side wall of the uppermost hood is a hyperbolic hood wall surface, and the corresponding furnace cavity inner wall is a hyperbolic furnace wall surface, the hyperbolic furnace wall surface and the hyperbolic hood wall surface are at the same height, and shrink toward each other from top to bottom at a constant and same shrinkage rate, forming a hyperbolic hopper in space; the lower part of the uppermost hood is a vertical hood wall surface, and the corresponding furnace cavity inner wall is a vertical furnace wall surface, and the vertical hood wall surface is at the same height as the vertical furnace wall surface; the furnace cavity inner wall corresponding to the wind tube and at the same height is a gradually expanding furnace wall surface, and the horizontal distance between the wind tube and the gradually expanding furnace wall surface gradually increases.

2. A vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1, characterized in that: A cone is installed at the middle part of the crossbeam loosener on the uppermost layer.

3. A vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 2, characterized in that: A plurality of layers of fins are arranged circumferentially on the outer surface of the cone.

4. A vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1, characterized in that: The angle between the wall surface of the conical distributor and the horizontal plane is greater than the accumulation angle of the material to be cooled.

5. The vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1 is characterized in that: The beam looseners are evenly arranged along the material layer height, in 2 to 5 layers, and the beam looseners in each layer are arranged in a "cross" or "M" shape; the beams on the beam looseners in two adjacent layers are staggered by 22.5° to 45°.

6. The vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1 is characterized in that: The initial angles of the hyperbolic furnace wall surface and the hyperbolic hood wall surface are 50° to 70°.

7. The vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1 is characterized in that: The outlet width of the hyperbolic hopper is 6 to 10 times the maximum particle size of the material to be cooled.

8. The vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1 is characterized in that: The air outlet direction of the hood is set to be vertically downward, or inclined downward.

9. The vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1, characterized in that: The discharge unit comprises a cone bucket and a discharge pipe. The cone bucket is connected to the bottom of the furnace cavity, and the discharge pipe is connected to the lower end of the cone bucket.

10. The vertical cooling furnace with uniform material distribution, rectification and loosening functions according to claim 1, characterized in that: The material distribution unit also includes a storage bin and a material discharge pipe. The material discharge pipe is connected to the end of the conical distributor with a small cross-sectional area, and the storage bin is fixed to the upper end of the material discharge pipe.

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