A double air duct vertical cooling equipment for material cooling and waste heat utilization

Abstract

This invention discloses a dual-duct vertical cooling device for material cooling and waste heat utilization. The main body of the device consists of a cooling cylinder, a feed hood, a rotary support platform, a discharge hood, and an external support frame. Multiple sets of cooling cones and a material collection tray are vertically arranged inside the cylinder, with a central ventilation duct in the center. The external support frame, through circumferential guide wheels and a cylinder retaining ring, ensures stable operation. The cooling cones adopt a combination of outer and inner cone structures, combined with a skirted concave design, which, combined with the rotation of the equipment, achieves flat material dispersion, expanding the gas-solid heat exchange area. The dual-duct system operates independently: turbid air is fluidized and pressure-stabilized by the discharge hood before directly exchanging heat with the material, with the heated gas used for material preheating; clean air indirectly exchanges heat with the cone walls through the central ventilation duct, forming clean air for use in the plant area. This invention achieves uniform material cooling, broadens the pathways for waste heat utilization, improves cooling effect and waste heat recovery efficiency, and is suitable for rotary kiln production lines in magnesium smelting and other similar applications.

Description

Technical Field

[0001] This invention belongs to the field of rotary kiln material cooling technology, specifically relating to a dual-duct vertical cooling device for material cooling and waste heat utilization. Background Technology

[0002] In industries such as metallurgy, building materials, and chemicals, rotary kilns are widely used as core roasting equipment in high-temperature processing of materials such as metallic magnesium, lime, cement clinker, and sintered ore. The roasted clinker usually has a high temperature and must be cooled before it can enter subsequent stages such as crushing, screening, and storage. The cooling effect directly determines the physical and chemical properties of the product. At the same time, high-temperature materials carry a large amount of waste heat, and the effective recovery of waste heat is also one of the key factors affecting the energy consumption cost of enterprises.

[0003] Currently, high-temperature material cooling equipment used in rotary kilns is mainly divided into two categories: horizontal coolers and vertical coolers. Although horizontal coolers can achieve continuous operation, they have drawbacks such as large vertical footprint and high equipment investment, making them unsuitable for production lines with limited space. On the other hand, vertical coolers, with their compact vertical layout, high space utilization, low maintenance costs, and direct counter-current heat exchange design advantages, are the preferred cooling equipment for rotary kilns, and are widely used in production lines such as lime calcination, magnesium smelting, and iron and steel sinter cooling.

[0004] Existing vertical coolers typically have a core structure of "cylinder + hood": the cooling cylinder is set vertically, with a hood assembly at the bottom. Ambient air is introduced through an external fan, and after being sprayed by the hood, it comes into reverse contact with the high-temperature material falling under gravity. After heat exchange, the cooling air carries away the residual heat and is discharged, while the material is output through the bottom discharge port.

[0005] However, this traditional structure has revealed many intractable technical problems in long-term industrial applications: First, the material cooling uniformity is poor. High-temperature materials fall in a pile-up manner under the action of gravity, and the permeability between particles is significantly different. Cooling air cannot penetrate the material layer evenly, resulting in local incomplete cooling and local over-cooling, which ultimately reduces the product qualification rate and increases the wear and tear on subsequent equipment. Second, the gas-solid heat exchange efficiency is low. The heat exchange path is short and the contact area is limited, making it difficult to quickly remove internal heat. The cooling air does not heat up sufficiently, and the potential for waste heat recovery has not been explored. Third, the form of waste heat utilization is limited. After the cooling air comes into direct contact with the material, it carries a large number of impurities and can only be used for feed preheating, resulting in low overall recovery efficiency.

[0006] Therefore, developing a new type of cooling equipment that can address the shortcomings of existing technologies from multiple dimensions, such as material dispersion, dual-airflow design, and graded waste heat recovery, and achieve multi-scenario, high-utilization recovery of high-temperature materials and waste heat, has become a technological bottleneck that urgently needs to be overcome in the field of rotary kiln supporting equipment. It is of great practical significance for promoting energy conservation, carbon reduction, and high-quality development in industries such as metallurgy and building materials. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a dual-duct vertical cooling device for material cooling and waste heat recovery. This device utilizes a conical structure and rotational motion to spread the material to be cooled evenly, reducing material accumulation and improving the distribution of cooling air, thereby increasing the cooling effect. By setting up a dual-duct physical structure, the cooling air is divided into two forms: a turbid air duct and a clean air duct, increasing the forms of waste heat recovery and improving waste heat recovery efficiency.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a dual-duct vertical cooling device for material cooling and waste heat utilization. The dual-duct vertical cooling device includes a cooling cylinder, a feed hood, a rotary support platform, and a discharge hood. The feed hood is fixedly installed at the top of the cooling cylinder, and the discharge hood is fixedly installed at the bottom of the cooling cylinder. The cooling cylinder is rotatably positioned between the feed hood and the discharge hood via the rotary support platform. The bottom of the feed hood is dynamically sealed to the top of the cooling cylinder, and the top of the discharge hood is dynamically sealed to the bottom of the cooling cylinder. The cooling machine cylinder is internally equipped with a cooling cone, a central ventilation pipe, and an inverted conical discharge cone. The cooling cone comprises an inner cone and an outer cone with an inner and outer gap fitting together. The outer cone includes an upper outer cone and an lower outer cone facing each other. The outer sides of the upper outer cone and the lower outer cone are sealed and fixed, and the inner sides are sealed and fixed to the central ventilation pipe. The inner side of the lower outer cone is sealed and fixed to the central ventilation pipe. The inner cone comprises an upper inner cone and an lower inner cone facing each other. The outer sides of the upper inner cone and the lower inner cone are sealed and fixed, and the inner sides are sealed and fixed to the central ventilation pipe. The inner side of the lower inner cone is sealed and fixed to the central ventilation pipe. The cooling cone is connected to the central ventilation pipe vertically through the gap between the inner and outer cones. The discharge cone is located at the bottom of the cooling machine cylinder and is used to centrally discharge materials into a discharge hood. The dual-duct vertical cooling equipment also includes a clean air inlet pipe, a clean air outlet pipe, a turbid air inlet pipe, a turbid air outlet pipe, an external feed pipe, and a discharge pipe. The clean air inlet pipe passes through the discharge hood and is dynamically sealed to the lower part of the central ventilation pipe. The clean air outlet pipe passes through the feed hood and is dynamically sealed to the upper part of the central ventilation pipe. The feed pipe and the turbid air outlet pipe are both directly connected to the top of the cooling machine cylinder through the feed hood. The discharge pipe and the turbid air inlet pipe are both directly connected to the bottom of the cooling machine cylinder through the discharge hood. The central ventilation duct is located in the center of the cooler cylinder, and the central ventilation duct, cooler cylinder, cooling cone and discharge cone are coaxially arranged.

[0009] Preferably, the dual-duct vertical cooling device further includes an external support frame mounted on the outer periphery of the cooling machine cylinder; a feed hood platform is provided on the top of the external support frame for fixing the feed hood to the top of the cooling machine cylinder; a cooling machine cylinder retaining ring is fixedly provided on the outer periphery of the cooling machine cylinder; a guide wheel platform is fixedly provided at the corresponding position of the external support frame and the cooling machine cylinder retaining ring, and three guide wheels are arranged circumferentially on the guide wheel platform, with the guide wheels tangent to and rolling in contact with the edge of the cooling machine cylinder retaining ring.

[0010] Preferably, multiple sets of cooling cones are arranged at intervals along the central ventilation pipe; an inverted conical material collection plate is provided inside the cooling machine cylinder, the outer side of the material collection plate is fixedly connected to the cooling machine cylinder, and the material collection plate is located below each of the outer lower cones above the bottommost cooling cone, used to re-collect and discharge the material downwards.

[0011] Preferably, the inner side of the material collection tray is fixedly connected to the central ventilation pipe and has a skirted notch structure along the circumference; the taper of the material collection tray is smaller than the taper of the outer upper cone.

[0012] Preferably, the outer upper cone and the inner upper cone are provided with a skirt protrusion structure on their outer circumferential sides. The outer upper cone is fixedly connected to the cooling machine cylinder through its skirt protrusion structure, and the skirt protrusion structure of the outer upper cone is inclined along the extension direction of the outer upper cone. The inner upper cone is fixedly connected to the outer upper cone through its skirt protrusion structure, and the skirt protrusion structure of the inner upper cone is horizontally arranged.

[0013] Preferably, the taper of the outer upper cone is greater than the taper of the outer lower cone, the taper of the inner upper cone is greater than the taper of the inner lower cone, the tapers of the outer upper cone and the inner upper cone are the same, and the tapers of the outer lower cone and the inner lower cone are the same.

[0014] Preferably, the reduced diameter of the cooler cylinder below the discharge cone is configured as a discharge section, which passes downward through the rotary support platform and is dynamically sealed to the top of the discharge hood.

[0015] Preferably, a rectangular vent is provided at the connection between the central ventilation pipe and the cooling cone to connect the gap of the cooling cone; a baffle is provided above the vent connected to the bottom of the cooling cone, and a baffle is provided below the vent connected to the top of the cooling cone.

[0016] Preferably, the top of the feeding hood is provided with a feeding pipe connection port and a turbid air outlet pipe connection port, and the side is provided with a clean air outlet pipe connection port; the side of the discharging hood is provided with a clean air inlet pipe connection port, and the bottom is provided with a discharging pipe connection port; the discharging hood is also provided with a funnel-shaped turbid air fluidization chamber located on the outer periphery of the discharging pipe connection port; the side of the turbid air fluidization chamber is provided with a turbid air inlet pipe connection port, and the top is provided with a turbid air fluidization hole; a wind cap is provided above the turbid air fluidization hole.

[0017] Preferably, the discharge pipe is equipped with an air baffle to reduce the pressure loss of turbid air at the bottom.

[0018] The dual-duct vertical cooling device for material cooling and waste heat utilization provided by this invention has the following beneficial effects: (1) Achieve continuous and uniform cooling of materials and improve cooling efficiency. The present invention sets a cooling cone with a combination of outer and inner cones inside the cooling machine cylinder. Combined with the rotational movement of the equipment, the high-temperature clinker is spread out and dispersed during the falling process, breaking the natural accumulation of materials in traditional equipment, effectively reducing the thickness of material accumulation, and expanding the gas-solid contact and heat exchange area. At the same time, the cooling cone is arranged in a vertical direction, so that the material can achieve full and continuous heat exchange with the cooling air and the cone wall during the falling process, realizing all-round cooling from the surface to the inside.

[0019] In addition, the dual air duct system, with its direct and indirect heat exchange, removes surface heat through direct contact between turbid air and the material, while indirectly removing internal heat through heat exchange between clean air and the cone wall. This solves the problems of incomplete local cooling and over-cooling in traditional equipment, significantly improving the temperature uniformity of the clinker after cooling. It also avoids problems such as clinker cracking and decreased activity caused by uneven temperature, thus improving the cooling effect of lime and magnesium clinker.

[0020] (2) Innovative dual-duct waste heat graded recovery mode, which greatly improves the waste heat recovery rate and enriches the ways of waste heat utilization. The present invention designs a dual-duct system of turbid air and clean air that are isolated from each other and operate independently, realizing the graded, efficient recovery and multi-scenario utilization of waste heat of materials, breaking through the single mode of existing technologies where waste heat air can only be used for material preheating.

[0021] The turbid air duct directly exchanges heat with the material through the discharge hood. The heated turbid air can be specifically used for preheating the rotary kiln material, meeting the waste heat utilization needs of the production end and realizing the internal circulation of production waste heat. The clean air duct indirectly exchanges heat with the cooling cone wall through the central ventilation pipe, without direct contact with the material throughout the process. The clean hot air generated after heat exchange can be directly supplied to the plant area for heating, drying, and other living scenarios, realizing the expansion of waste heat from "single-use in production" to "comprehensive utilization of production and living". The dual-duct design allows the waste heat of the material to be fully explored and utilized. Compared with traditional single-duct equipment and existing improvement solutions, the waste heat recovery efficiency is improved, reducing the heat energy waste during the cooling process of high-temperature materials and maximizing the utilization of waste heat resources.

[0022] (3) It aligns with the "dual carbon" target and has industrial promotion value. This invention achieves energy saving and carbon reduction from the dual dimensions of material cooling and waste heat recovery, significantly improves the waste heat recovery utilization rate of enterprises, reduces enterprise energy consumption costs, and meets the core environmental assessment indicators under the "dual carbon" target in the industrial field. The equipment operates stably and has low maintenance costs. It can be widely used in rotary kiln supporting production lines in industries such as metallurgy, building materials, and chemicals, and has important practical significance for promoting the green and high-quality development of related industries. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the feed hood of the present invention; Figure 4 This is a schematic cross-sectional view of the cooling cylinder of the present invention; Figure 5 This is a schematic cross-sectional view of the discharge hood of the present invention; Figure 6 This is a top view cross-sectional structural diagram of the cooling cone of the present invention; Figure 7 for Figure 6 A schematic diagram of a partial cross-sectional structure at point AA in the main view direction; Figure 8 This is a schematic diagram of the outer upper cone structure of the present invention; Figure 9 This is a schematic diagram of the inner upper cone structure of the present invention; Figure 10 This is a schematic diagram of the material collection tray of the present invention; Figure 11 This is a schematic diagram of the central ventilation duct of the present invention.

[0024] In the diagram: 1. Feed hood; 2. External support; 3. Cooler cylinder; 4. Rotary support platform; 5. Discharge hood; 6. Thrust wheel platform; 7. Cooler cylinder retaining ring; 8. Thrust wheel; 9. Feed hood platform; 10. Cooling cone; 11. Outer upper cone; 12. Inner upper cone; 13. Inner lower cone; 14. Outer lower cone; 15. Material collection tray; 16. Central ventilation pipe; 17. Discharge cone; 18. Air cap; 19. Clean air inlet pipe; 101. Material pipe; 102, Turbid air outlet pipe; 103, Clean air outlet pipe; 301, Rib plate; 302, Cooler cylinder discharge section; 501, Clean air inlet pipe connection port; 502, Turbid air fluidization chamber; 503, Turbid air fluidization hole; 504, Wind baffle plate; 505, Discharge pipe; 506, Turbid air inlet pipe; 1101, Skirt protrusion structure; 1501, Skirt recess structure; 1601, Air inlet and outlet; 1602, Wind deflector. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see as follows Figures 1-2 As shown, a dual-duct vertical cooling device for material cooling and waste heat utilization includes a cooling cylinder 3, a feed hood 1, a rotary support platform 4, and a discharge hood 5. The feed hood 1 is fixedly installed at the top of the cooling cylinder 3, and the discharge hood 5 is fixedly installed at the bottom of the cooling cylinder 3. The cooling cylinder 3 is rotatably installed between the feed hood 1 and the discharge hood 5 via the rotary support platform 4. The bottom of the feed hood 1 is dynamically sealed to the top of the cooling cylinder 3, and the top of the discharge hood 5 is dynamically sealed to the bottom of the cooling cylinder 3.

[0027] Please see Figure 2 and Figure 6As shown, the cooling cylinder 3 is internally equipped with a cooling cone 10, a central ventilation pipe 16, and an inverted conical discharge cone 17. The cooling cone 10 includes an inner cone and an outer cone with an inner and outer gap fitting together. The outer cone includes an upper outer cone 11 and a lower outer cone 14 that are mated against each other. The outer side of the upper outer cone 11 is sealed and fixed to the outer side of the lower outer cone 11, and the inner side is sealed and fixed to the central ventilation pipe 16. The inner side of the lower outer cone 14 is sealed and fixed to the central ventilation pipe 16. The material flows along the upper outer cone 11... The cone moves downwards; the inner cone includes an inner upper cone 12 and an inner lower cone 13 that are connected to each other; the outer side of the inner upper cone 12 is sealed and fixed to the outer side of the inner lower cone 13, and the inner side is sealed and fixed to the central ventilation pipe 16; the inner side of the inner lower cone 13 is sealed and fixed to the central ventilation pipe 16; the cooling cone 10 is connected to the central ventilation pipe 16 from top to bottom through the gap between the inner and outer cones; the discharge cone 17 is located at the bottom of the cooling machine cylinder 3 and is used to discharge the material into the discharge hood 5.

[0028] The dual-duct vertical cooling equipment also includes a clean air inlet pipe 19, a clean air outlet pipe 103, a turbid air inlet pipe 506, a turbid air outlet pipe 102, an external feed pipe 101, and a discharge pipe 505. The clean air inlet pipe 19 passes through the discharge hood 5 and is dynamically sealed to the lower part of the central ventilation pipe 16. The clean air outlet pipe 103 passes through the feed hood 1 and is dynamically sealed to the upper part of the central ventilation pipe 16. The feed pipe 101 and the turbid air outlet pipe 102 are both directly connected to the top of the cooling machine cylinder 3 through the feed hood 1. The discharge pipe 505 and the turbid air inlet pipe 506 are both directly connected to the bottom of the cooling machine cylinder 3 through the discharge hood 5.

[0029] The central ventilation pipe 16 is located in the center of the cooler cylinder 3, and the central ventilation pipe 16, the cooler cylinder 3, the cooling cone 10 and the discharge cone 17 are coaxially arranged.

[0030] The dual-duct vertical cooling equipment also includes an external support 2 mounted on the outer periphery of the cooling machine cylinder 3; a feed hood platform 9 is installed on the top of the external support 2 to fix the feed hood 1 to the top of the cooling machine cylinder 3; a cooling machine cylinder retaining ring 7 is fixedly installed on the outer periphery of the cooling machine cylinder 3; a guide wheel platform 6 is fixedly installed at the corresponding position of the external support 2 and the cooling machine cylinder retaining ring 7, and three guide wheels 8 are arranged circumferentially on the guide wheel platform 6, the guide wheels 8 being tangential to and in rolling contact with the edge of the cooling machine cylinder retaining ring 7. (See reference...) Figure 1 , Figure 2 Two cooling cylinder retaining rings 7 are provided at intervals on the outer circumference of the cooling cylinder 3 to ensure that no displacement occurs during the movement.

[0031] The rotary support platform 4 is fixedly connected to the bottom of the cooling machine cylinder 3, and a support is provided at the bottom to contact the ground.

[0032] Multiple sets of cooling cones 10 are arranged axially along the central ventilation duct 16. An inverted conical material collection tray 15 is installed inside the cooling cylinder 3. The outer side of the material collection tray 15 is fixedly connected to the cooling cylinder 3. The material collection tray 15 is located below each of the outer lower cones 14 above the bottommost cooling cone 10, used to re-concentrate and discharge the material downwards. The multi-layered arrangement of cooling cones 10 and material collection trays 15 in the vertical direction extends the cooling path and heat exchange time of the material, allowing for sufficient and continuous heat exchange between the material and the cooling air and cone wall during its descent, achieving all-round cooling from the surface to the interior.

[0033] Please see Figure 2 , Figure 10 The inner side of the material collection tray 15 is fixedly connected to the central ventilation pipe 16 and is provided with a skirted notch structure 1501 along the circumference; the taper of the material collection tray 15 is smaller than the taper of the outer upper cone 11.

[0034] Please see Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The outer upper cone 11 and the inner upper cone 12 are provided with skirt protrusions 1101 on their outer circumferential sides. The outer upper cone 11 is fixedly connected to the cooling cylinder 3 through its skirt protrusions 1101. The skirt protrusions 1101 of the outer upper cone 11 are inclined along the extension direction of the outer upper cone 11 to prevent material accumulation. The inner upper cone 11 is fixedly connected to the outer upper cone 11 through its skirt protrusions 1101. The skirt protrusions 1101 of the inner upper cone 12 are horizontally arranged to facilitate fixation with the outer upper cone 11 and allow air to circulate inside, eliminating the need to consider blockage issues.

[0035] The taper of the outer upper cone 11 is greater than that of the outer lower cone 14, and the taper of the inner upper cone 12 is greater than that of the inner lower cone 13. The tapers of the outer upper cone 11 and the inner upper cone 12 are the same, and the tapers of the outer lower cone 14 and the inner lower cone 13 are the same. By setting the upper cone taper to be greater than the lower cone taper, the material can fall at a faster speed along the upper cone surface, thus providing the necessary conditions for falling. The lower cone surface taper is smaller to improve the utilization efficiency of the internal space and facilitate the arrangement of multiple cones to improve heat exchange efficiency. The taper of the outer upper cone is 20°-30°, the taper of the outer lower cone is 10°-20°, the taper of the inner upper cone is the same as that of the outer upper cone (20°-30°), and the taper of the inner lower cone is the same as that of the outer lower cone, maintained at 10°-20°. These tapers can be finely adjusted within the above range according to specific material parameters.

[0036] The cooling cylinder 3 below the discharge cone 17 is reduced in diameter to form a discharge section 302. The discharge section 302 passes downward through the rotary support platform 4 and is dynamically sealed to the top of the discharge hood 5 to ensure that the material concentrated by the discharge cone 17 accurately enters the discharge hood 5. A stiffening plate 301 is also fixedly provided between the discharge cone 17 and the cooling cylinder 3 to enhance the stability of the bottom of the cooling cylinder 3 and maintain the overall stability during high-power operation.

[0037] At the connection between the central ventilation duct 16 and the cooling cone 10, three rectangular ventilation openings 1601 are evenly spaced along the circumference to connect the gaps in the cooling cone 10. A baffle plate 1602 is provided above the ventilation opening 1601 connected to the bottom of the cooling cone 10, and a baffle plate 1602 is provided below the ventilation opening connected to the top of the cooling cone 10. (See also...) Figure 2 , Figure 11 The central ventilation pipe 16 is sealed to the inner side of the cooling cone 10. Clean air enters from the bottom of the central ventilation pipe 16, and under the obstruction of the baffle plate 1602, it enters the gap between the inner and outer cones through the lower ventilation port 1601. After heat exchange, it is discharged from the upper ventilation port 1601 and continues to rise along the inside of the central ventilation pipe 16 for heat exchange in the next set of cooling cones 10. Finally, it is discharged from the clean air outlet pipe 103.

[0038] Please see Figure 2 , Figure 3 The top of the feed hood 1 is provided with a feed pipe 101 connection port and a turbid air outlet pipe 102 connection port, and the side is provided with a clean air outlet pipe 103 connection port. The axes of the turbid air outlet pipe 102 and the clean air outlet pipe 103 are in the same plane and perpendicular to the axis of the feed pipe 101, so as to reduce the spatial impact on the feed of the feed pipe 101.

[0039] The discharge hood 5 has a clean air inlet 501 on its side and a discharge pipe 505 at its bottom. The discharge hood 5 also has a funnel-shaped turbid air fluidization chamber 502 located around the discharge pipe 505. The turbid air fluidization chamber 502 has a turbid air inlet 506 on its side and a turbid air fluidization hole 503 at its top. A wind cap 18 is provided above the turbid air fluidization hole 503 to ensure that the turbid air is sprayed upward.

[0040] An air baffle 504 is installed inside the discharge pipe 505 to reduce the pressure loss of turbid air at the bottom.

[0041] In this embodiment, four sets of cooling cones 10 and three sets of material collection trays 15 are provided. The cooling cones 10 can be adaptively adjusted within the range of 2-6 sets according to the processing volume and initial temperature of the material to be cooled. Three thrust rollers 8 are evenly arranged along the circumference at 120° intervals, and the number can be adjusted to 3-6 according to the diameter of the cylinder.

[0042] A dual-duct vertical cooling device for material cooling and waste heat utilization, the working principle of which is described below: After the roasting process is completed, the material to be cooled enters the feed hood 1 through the feed pipe 101 and comes into contact with the first set of cooling cones 10; The material is dispersed along the inclined direction on the cooling cone 10 and moves downwards due to the tilting of the cooling cone 10 and the rotation of the cooling cylinder 3 itself. During the movement, it exchanges heat with the air and the cone wall. After passing through the cooling cone 10, the material falls to the material collection plate 15, disperses and falls along the material collection plate 15, exchanges heat with the turbid air and the wall during the falling process, and enters the next set of cooling cones 10 at the skirt notch structure 1501 in the middle of the material collection plate 15. After heat exchange through multiple sets of cooling cones 10, the material that meets the cooling requirements is finally obtained and output along the bottom discharge pipe 505 to enter the next process, completing the continuous cooling of the material.

[0043] The cooling machine cylinder 3 is in a rotating state. An external turbid air cooler draws cooling air to the turbid air inlet duct 506. After the cooling air is stabilized in the turbid air fluidization chamber 502, it continues to pass through the air cap 18 and enter the cooling machine cylinder 3. It rises continuously along the gap between the cooling machine cylinder 3 and the cooling cone 10, exchanging heat with the material to be cooled during the rising process. Finally, the heated air is drawn by an external induced draft fan through the turbid air outlet duct 102 to enter the material preheating stage for heat reuse. An external clean air cooler draws cooling air to the clean air inlet duct 19 and enters the central ventilation duct 16. It travels along the internal air path of the central ventilation duct 16 and the gap of the cooling cone 3, continuously exchanging heat with the cone wall, thus cooling the material and raising the temperature of the air duct. Finally, the air duct connects to the factory work area for heating and drying items. This air duct passes through the inside of the cone and does not come into direct contact with the material. The resulting air is clean air and can be used directly for daily life.

[0044] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-duct vertical cooling device for material cooling and waste heat utilization, characterized in that, The dual-duct vertical cooling equipment includes a cooling cylinder, a feed hood, a rotary support platform, and a discharge hood. The feed hood is fixedly installed at the top of the cooling cylinder, and the discharge hood is fixedly installed at the bottom of the cooling cylinder. The cooling cylinder is rotatably positioned between the feed hood and the discharge hood via the rotary support platform. The bottom of the feed hood is dynamically sealed to the top of the cooling cylinder, and the top of the discharge hood is dynamically sealed to the bottom of the cooling cylinder. The cooling machine cylinder is internally equipped with a cooling cone, a central ventilation pipe, and an inverted conical discharge cone. The cooling cone comprises an inner cone and an outer cone with an inner and outer gap fitting together. The outer cone includes an upper outer cone and an lower outer cone facing each other. The outer sides of the upper outer cone and the lower outer cone are sealed and fixed, and the inner sides are sealed and fixed to the central ventilation pipe. The inner side of the lower outer cone is sealed and fixed to the central ventilation pipe. The inner cone comprises an upper inner cone and an lower inner cone facing each other. The outer sides of the upper inner cone and the lower inner cone are sealed and fixed, and the inner sides are sealed and fixed to the central ventilation pipe. The inner side of the lower inner cone is sealed and fixed to the central ventilation pipe. The cooling cone is connected to the central ventilation pipe vertically through the gap between the inner and outer cones. The discharge cone is located at the bottom of the cooling machine cylinder and is used to centrally discharge materials into a discharge hood. The dual-duct vertical cooling equipment also includes a clean air inlet pipe, a clean air outlet pipe, a turbid air inlet pipe, a turbid air outlet pipe, an external feed pipe, and a discharge pipe. The clean air inlet pipe passes through the discharge hood and is dynamically sealed to the lower part of the central ventilation pipe. The clean air outlet pipe passes through the feed hood and is dynamically sealed to the upper part of the central ventilation pipe. The feed pipe and the turbid air outlet pipe are both directly connected to the top of the cooling machine cylinder through the feed hood. The discharge pipe and the turbid air inlet pipe are both directly connected to the bottom of the cooling machine cylinder through the discharge hood. The central ventilation duct is located in the center of the cooler cylinder, and the central ventilation duct, cooler cylinder, cooling cone and discharge cone are coaxially arranged.

2. The dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, The dual-duct vertical cooling equipment also includes an external support frame mounted on the outer periphery of the cooling machine cylinder; a feed hood platform is installed on the top of the external support frame to fix the feed hood to the top of the cooling machine cylinder; a cooling machine cylinder retaining ring is fixedly installed on the outer periphery of the cooling machine cylinder; a guide wheel platform is fixedly installed at the corresponding position of the external support frame and the cooling machine cylinder retaining ring, and three guide wheels are arranged circumferentially on the guide wheel platform, with the guide wheels tangent to and rolling in contact with the edge of the cooling machine cylinder retaining ring.

3. The dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, Multiple sets of cooling cones are arranged at intervals along the central ventilation pipe; an inverted conical material collection plate is provided inside the cooling machine cylinder, and the outer side of the material collection plate is fixedly connected to the cooling machine cylinder. The material collection plate is located below each of the outer lower cones above the bottommost cooling cone, and is used to re-concentrate and discharge the material downwards.

4. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 3, characterized in that, The inner side of the material collection tray is fixedly connected to the central ventilation pipe and has a skirted notch structure along the circumference; the taper of the material collection tray is smaller than the taper of the outer upper cone.

5. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, The outer upper cone and the inner upper cone are provided with skirt protrusions on their outer circumferential sides. The outer upper cone is fixedly connected to the cooling machine cylinder through its skirt protrusions. The skirt protrusions of the outer upper cone are inclined along the extension direction of the outer upper cone. The inner upper cone is fixedly connected to the outer upper cone through its skirt protrusions. The skirt protrusions of the inner upper cone are horizontally arranged.

6. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, The taper of the outer upper cone is greater than that of the outer lower cone, the taper of the inner upper cone is greater than that of the inner lower cone, the taper of the outer upper cone is the same as that of the inner upper cone, and the taper of the outer lower cone is the same as that of the inner lower cone.

7. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, The reduced diameter of the cooling cylinder below the discharge cone is set as the discharge section, which passes downward through the rotary support platform and is dynamically sealed to the top of the discharge hood.

8. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, A rectangular vent is provided at the connection between the central ventilation duct and the cooling cone to connect the gap of the cooling cone; a baffle is provided above the vent connected to the bottom of the cooling cone and below the vent connected to the top of the cooling cone.

9. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, The top of the feeding hood is provided with a feeding pipe connection port and a turbid air outlet pipe connection port, and the side is provided with a clean air outlet pipe connection port. The discharge hood is provided with a clean air inlet pipe connection port on its side and a discharge pipe connection port at its bottom; the discharge hood is also provided with a funnel-shaped turbid air fluidization chamber located on the outer periphery of the discharge pipe connection port; the turbid air fluidization chamber is provided with a turbid air inlet pipe connection port on its side and a turbid air fluidization hole at its top; a wind cap is provided above the turbid air fluidization hole.

10. A dual-duct vertical cooling device for material cooling and waste heat utilization according to claim 1, characterized in that, An air baffle is installed inside the discharge pipe to reduce the pressure loss of turbid air at the bottom.

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