External spiral dust waste heat recovery device

Abstract

The utility model provides a kind of external spiral dust residual heat recovery device, including a kind of external spiral dust residual heat recovery device, including dust conveying mechanism, rotary crushing mechanism, vibration feeding mechanism, feed pipe and spiral coil pipe;Dust conveying mechanism includes conveying pipeline, feed tank, discharge tank, discharge pipe and screw conveying mechanism, screw conveying mechanism is arranged in conveying pipeline, feed tank is arranged in one end of conveying pipeline, discharge tank is arranged in the other end of conveying pipeline, discharge pipe is arranged in the just below of discharge tank.The utility model described a kind of external spiral dust residual heat recovery device, solve the problem of the heat energy of a large number of high-temperature dust directly lost, and cause the thermal damage of downstream conveying equipment and the problem of low energy utilization rate due to the high-temperature dust in the related technology is not set with special cooling and residual heat recovery structure after being collected.

Description

Technical Field

[0001] This utility model belongs to the field of energy-saving and environmental protection technology, and in particular relates to an external spiral dust waste heat recovery device. Background Technology

[0002] In modern industrial production, cement manufacturing, as one of the high-energy-consuming industries, has long been a focus of attention due to its energy conservation and waste heat recovery issues. Although new dry-process cement production lines have significantly improved upon traditional wet-process kilns in terms of process flow, and supporting waste heat power generation devices have become industry standard, cement kiln systems still suffer from significant emissions of high-temperature dust and heat waste during operation. In particular, the dust carried in the exhaust gas at the kiln head and tail is not only high in temperature and dust content, but some of this high-temperature dust still possesses considerable thermal energy value after collection. Current processes typically directly transport this high-temperature dust to raw material silos or ash storage bins without effective waste heat recovery treatment, resulting in direct waste of thermal energy. Furthermore, the dust temperature is generally between 150 and 200°C, far exceeding the 120°C temperature resistance limit of conveying equipment (such as bucket elevators and rubber conveyor belts), easily causing aging, deformation, or even ablation failure of conveying components, posing a serious threat to production safety and equipment lifespan. It is evident that although existing cement kiln production lines have achieved preliminary energy recovery in the waste heat power generation stage of exhaust gas, there is still insufficient development and utilization of the high-temperature energy flow stage of dust waste heat.

[0003] Because the high-temperature dust in the relevant technology is not equipped with a dedicated cooling and waste heat recovery structure after being collected, a large amount of heat energy of the high-temperature dust is directly lost, causing thermal damage and low energy utilization of downstream conveying equipment. Utility Model Content

[0004] In view of this, the present invention aims to at least partially solve one of the related technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] An external spiral dust waste heat recovery device includes an external spiral dust waste heat recovery device, comprising a dust conveying mechanism, a rotary crushing mechanism, a vibrating feeding mechanism, a feeding pipe, and a spiral coil.

[0007] The dust conveying mechanism includes a conveying pipe, a feed box, a discharge box, a discharge pipe, and a screw conveying mechanism. The screw conveying mechanism is disposed inside the conveying pipe, the feed box is disposed at one end of the conveying pipe, the discharge box is disposed at the other end of the conveying pipe, and the discharge pipe is disposed directly below the discharge box.

[0008] The spiral coil is sleeved and attached to the outer wall of the conveying pipeline. One end of the spiral coil is the inlet of the heat transfer medium, and the other end of the spiral coil is the outlet of the heat transfer medium.

[0009] The rotary crushing mechanism is located above the feed box and is connected to the feed box;

[0010] The vibrating feeder is positioned above the rotary crushing mechanism, and the feed pipe is located inside the vibrating feeder and connected to the rotary crushing mechanism.

[0011] Furthermore, the screw conveying mechanism includes a conveying shaft and screw conveying blades. The conveying shaft is rotatably coupled with the feed box and the discharge box, respectively, and the screw conveying blades are disposed on the outer wall of the conveying shaft.

[0012] The drive end of the conveyor shaft is connected to the output end of the first drive motor via belt drive.

[0013] Furthermore, the rotary crushing mechanism includes a feed box and two rotary crushing components. The feed box is located directly above and communicates with the feed box, and the two rotary crushing components are symmetrically arranged on the feed box.

[0014] Each of the rotary crushing components includes a rotary shaft, a crushing roller, and multiple spiral crushing blades. The crushing roller is disposed on the rotary shaft, and the multiple spiral crushing blades are evenly disposed on the outer wall of the crushing roller.

[0015] Each of the rotating shafts has a sprocket tooth structure at its end that meshes with the chain, and is driven by a corresponding second drive motor via chain drive.

[0016] Furthermore, the two rotary crushing components rotate in opposite directions, and the spiral crushing blades of both have opposite spiral directions.

[0017] Furthermore, the vibrating feeding mechanism includes a vibrating feeding pipe, an annular support seat, two elastic support components, and two vibrating cylinders;

[0018] The annular support seat is disposed on the upper end face of the feeding box, the vibrating feeding pipe is disposed on the inner side of the annular support seat, the inner wall of the annular support seat is provided with an annular sealing baffle that cooperates with and seals the outer wall of the vibrating feeding pipe, and the top of the vibrating feeding pipe is provided with a first flange plate.

[0019] Two elastic support components are symmetrically arranged on the upper surface of the annular support base, and the first flange plate is slidably connected to the elastic support components; two vibrating cylinders are symmetrically arranged front and rear on the upper surface of the annular support base, and their output ends are connected to the first flange plate.

[0020] The upper part of the inner wall of the vibrating feed pipe is provided with multiple sealing rings.

[0021] Furthermore, the feed pipe is arranged coaxially inside the vibrating feed pipe, and a second flange plate is provided at the top of the feed pipe;

[0022] The bottom of the vibrating feed pipe has a constricted structure, and this constricted structure is located between the two rotary crushing components.

[0023] Furthermore, each of the elastic support components includes a guide slide rod and two springs, the bottom of which is threadedly connected to the annular support seat and slidably engaged with the first flange plate;

[0024] The two springs are respectively disposed on the upper and lower sides of the first flange plate and are both sleeved on the outside of the guide slide rod;

[0025] The guide slide is provided with a limiting block at the top, and a limiting nut that is threadedly engaged with the guide slide is provided on its upper part. The limiting nut is located on the top of the spring located at the upper part.

[0026] Furthermore, the outer wall of the spiral coil is provided with spiral fins.

[0027] Furthermore, the heat transfer medium inlet is located at one end near the discharge box, and the heat transfer medium outlet is located at one end near the feed box, so as to form countercurrent heat exchange opposite to the dust conveying direction, thereby achieving efficient cooling and waste heat recovery of high-temperature dust.

[0028] Compared with existing technologies, the external spiral dust waste heat recovery device of this utility model has the following advantages:

[0029] 1. By placing a spiral coil on the outer wall of the conveying pipe and employing counter-current heat exchange, efficient cooling and waste heat recovery of high-temperature dust are achieved. The spiral fins increase the heat exchange area, allowing the heat energy released by the dust to be fully transferred to the heat transfer medium, thereby significantly improving energy utilization. Compared to traditional conveying methods that rely solely on natural cooling, this solution can rapidly reduce the dust temperature to a safe range over a short distance, effectively preventing high-temperature damage to downstream components such as conveyor belts and ash storage silos. Furthermore, this structure eliminates the need for direct cooling fluid flow within the system, avoiding disruption to the dust flow pattern and sealed environment. The structure is safe, reliable, and easy to maintain.

[0030] 2. This device employs a combination of top-mounted vibrating feeder and double-roller counter-rotating crusher, achieving continuous feeding and uniform crushing of high-temperature dust. The vibrating feeder, with its elastic support and cylinder drive, ensures stable feeding; while the relative rotation and spiral guiding structure of the rotary crusher components fully shear and uniformly disperse agglomerated dust. This not only improves the particle size distribution of dust before conveying, preventing blockages and flow deviations, but also makes the subsequent heat exchange process more thorough and uniform, significantly enhancing the overall operational stability and heat transfer efficiency of the device. Attached Figure Description

[0031] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0032] Figure 1 This is a schematic diagram of an external spiral dust waste heat recovery device according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the vibrating feeding mechanism and the rotary crushing mechanism described in the embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the rotary crushing assembly described in an embodiment of the present invention;

[0035] Figure 4 This refers to the spiral conveying mechanism described in the embodiments of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Conveying pipe; 110. Heat transfer medium inlet; 120. Heat transfer medium outlet; 200. Spiral coil; 300. Feed box; 310. Feed hopper; 320. Second flange plate; 400. Discharge box; 410. Discharge pipe; 500. Rotary crushing mechanism; 510. Rotary crushing assembly; 511. Crushing roller; 512. Spiral crushing blade; 513. Rotating shaft; 600. Vibrating feeding mechanism; 610. First flange plate; 620. Annular support seat; 630. Elastic support assembly; 640. Vibrating cylinder; 650. Vibrating feed pipe; 710. Conveying shaft; 720. Spiral conveying blade. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] In light of the background technology, if high-temperature dust is not cooled after collection, it can easily cause thermal damage to downstream conveying equipment and energy waste. This embodiment provides an external spiral dust waste heat recovery device for synchronous cooling and energy recovery of high-temperature dust during dust conveying, thereby improving the safety and energy efficiency of the overall system.

[0043] like Figure 1 As shown, the external spiral dust waste heat recovery device of this embodiment includes: a dust conveying mechanism, a rotary crushing mechanism 500, a vibrating feeding mechanism 600, a feeding pipe, and a spiral coil 200. In terms of overall structure, the rotary crushing mechanism 500 and the vibrating feeding mechanism 600 are arranged sequentially at the top of the conveying system. After being crushed and fed, the dust enters the interior of the dust conveying mechanism through the feeding pipe for lateral transmission, and heat transfer and dust cooling are achieved through the surrounding heat exchange of the spiral coil 200.

[0044] The dust conveying mechanism includes a conveying pipe 100, a feed box 300, a discharge box 400, a discharge pipe 410, and a screw conveyor mechanism. The conveying pipe 100 is made of thick-walled metal tubing and serves as a flow channel for carrying high-temperature dust. Its two ends are fixedly connected to the feed box 300 and the discharge box 400, respectively. For ease of installation and maintenance, both the feed box and the discharge box are detachably connected to the conveying pipe 100 via flanges. The discharge pipe 410 is located directly below the discharge box 400 and is constructed of high-temperature resistant steel plate. It is used to discharge cooled dust and send it to a dust storage device or the next processing unit. The screw conveyor mechanism is located inside the conveying pipe 100 and includes a conveying shaft 710 and screw conveying blades 720. Both ends of the conveying shaft 710 are rotatably engaged with the inner walls of the feed box 300 and the discharge box 400 via bearing assemblies to ensure coaxiality and sealing performance during rotation. The spiral conveyor blades 720 are spirally welded along the outer wall of the conveyor shaft 710, and the pitch and blade angle are designed according to the dust particle size and flow velocity. The drive end of the conveyor shaft 710 is connected to the output shaft of the first drive motor via belt drive. The motor is mounted on the outer support of the conveying pipe, and the transmission efficiency is adjusted by the belt pulley tensioning structure to ensure that the dust is uniformly propelled axially under stable rotation.

[0045] To achieve simultaneous dust flow and cooling, the spiral coil 200 is externally mounted and attached to the outer wall of the conveying pipe 100, forming a surrounding heat exchange layer. One end of the spiral coil 200 has a heat transfer medium inlet 110, and the other end has a heat transfer medium outlet 120. The inner wall is equipped with spiral fins to expand the heat exchange area and enhance the turbulence effect. The heat transfer medium inlet 110 is located near the discharge box 400, while the heat transfer medium outlet 120 is located near the feed box 300, causing the heat transfer medium and dust to flow in opposite directions, forming a counter-current heat exchange structure. This achieves full recovery of heat from the high-temperature zone and stable temperature rise of the cold-end medium.

[0046] A rotary crushing mechanism 500 is positioned above the feed hopper 300 to crush and loosen incoming agglomerated materials. The rotary crushing mechanism 500 includes a feed hopper 310 and two rotary crushing components 510. The feed hopper 310 is connected to the upper surface of the feed hopper 300 via a connecting flange, forming a closed transition channel. The two rotary crushing components 510 are symmetrically arranged on both sides of the feed hopper 310. Each crushing component includes a rotating shaft 513, a crushing roller 511, and multiple spiral crushing blades 512. The crushing roller 511 is fixedly mounted on the rotating shaft 513, and the multiple spiral crushing blades 512 are evenly distributed along the circumference of the outer wall of the crushing roller 511. Each rotating shaft 513 has a sprocket tooth structure at its end, which is connected to the corresponding output shaft of a second drive motor via a chain. The two rotary crushing components 510 rotate in opposite directions, and their respective spiral blades rotate in opposite directions, causing the material to be squeezed, sheared, and dispersed under the action of the opposing rollers, thereby achieving thorough crushing and uniform feeding of large particles of dust.

[0047] A vibrating feeder mechanism 600 is positioned above the rotary crushing mechanism 500, primarily used for the continuous and quantitative supply of high-temperature dust or materials. This mechanism includes a vibrating feed pipe 650, an annular support base 620, two elastic support components 630, and two vibrating cylinders 640. The annular support base 620 is fixedly mounted on the upper surface of the feed box 310, and its inner wall is fitted with an annular sealing baffle that seals against the outer wall of the vibrating feed pipe 650 to prevent dust leakage during vibration. A first flange plate 610 is located at the top of the vibrating feed pipe 650, connected to an external feed pipe by bolts. The two elastic support components 630 are symmetrically distributed on the upper surface of the annular support base 620. The first flange plate 610 slides against the elastic support components 630 via a sliding groove structure, allowing for flexible displacement during vibration. The two vibrating cylinders 640 are symmetrically arranged front and rear, with their output ends hinged to the first flange plate 610, achieving up-and-down vibration through periodic pneumatic drive. The upper part of the inner wall of the vibrating feed pipe 650 is equipped with multiple layers of sealing rings to maintain an airtight state and prevent hot air leakage. The feed pipe is coaxially installed inside the vibrating feed pipe 650, and a second flange plate 320 is provided at the top for connection with the upstream conveying system. The bottom of the vibrating feed pipe 650 forms a constriction structure, and the constriction outlet is located between the two rotary crushing components 510, so that the material is evenly dispersed into the crushing zone under the action of vibration, avoiding deviation or accumulation.

[0048] Each elastic support assembly 630 includes a guide slide rod and two springs. The bottom of the guide slide rod is fixedly connected to the annular support seat 620 by threads, and the upper end of the guide slide rod passes through and slides with the first flange plate 610. The top of the guide slide rod is provided with a limit block to prevent excessive displacement, and the upper part is provided with an adjustable limit nut. By tightening or loosening the limit nut, the spring preload and vibration amplitude can be adjusted to achieve feeding adaptability under different material conditions.

[0049] How this example works

[0050] Step 1: The high-temperature dust or lumpy material to be processed first enters the vibrating feed pipe 650 from the upstream system through the feed pipe. Then, under the alternating action of two vibrating cylinders 640, the vibrating feed pipe 650 generates a vertical reciprocating motion, causing the material to fall evenly and stably along its inner wall, and is guided into the rotary crushing mechanism 500 below through the constriction structure at the bottom, effectively avoiding material deviation and accumulation.

[0051] Step 2: The two relatively rotating crushing components start synchronously, using their counter-rotating helical blades to rapidly shear and compress the falling material, thoroughly crushing and dispersing it into uniform particles, creating favorable conditions for subsequent efficient heat exchange.

[0052] Step 3: The crushed high-temperature dust enters the conveying pipe 100. Driven by the first drive motor, the spiral conveying blades 720 generate continuous axial thrust, propelling the dust forward smoothly. During this conveying process, the dust continuously contacts the inner wall of the pipe and undergoes forced convection heat exchange.

[0053] Step 4: Simultaneously with dust conveying, the cooling heat transfer medium introduced into the external spiral coil 200 flows counter-currently from the outlet side to the inlet side. Under the turbulence effect of the spiral fins inside the coil, the medium and the dust outside the coil wall exchange heat efficiently. After absorbing heat energy, the temperature of the heat transfer medium rises, and it can be output as a heat source for secondary use such as heating or power generation; while the fully cooled dust is finally discharged smoothly from the discharge pipe 410, thus simultaneously completing the entire process of conveying and waste heat recovery.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An external spiral dust waste heat recovery device, characterized in that: The invention includes an external spiral dust waste heat recovery device, characterized in that it includes a dust conveying mechanism, a rotary crushing mechanism (500), a vibrating feeding mechanism (600), a feeding pipe and a spiral coil (200). The dust conveying mechanism includes a conveying pipe (100), a feed box (300), a discharge box (400), a discharge pipe (410), and a screw conveying mechanism. The screw conveying mechanism is disposed inside the conveying pipe (100). The feed box (300) is disposed at one end of the conveying pipe (100), the discharge box (400) is disposed at the other end of the conveying pipe (100), and the discharge pipe (410) is disposed directly below the discharge box (400). The spiral coil (200) is sleeved and attached to the outer wall of the conveying pipe (100). One end of the spiral coil (200) is the heat transfer medium inlet (110), and the other end of the spiral coil (200) is the heat transfer medium outlet (120). The rotary crushing mechanism (500) is located above the feed box (300) and is connected to the feed box (300); The vibrating feeder (600) is located above the rotary crushing mechanism (500), and the feed pipe is located inside the vibrating feeder (600) and connected to the rotary crushing mechanism (500).

2. The external spiral dust waste heat recovery device according to claim 1, characterized in that: The screw conveying mechanism includes a conveying shaft (710) and screw conveying blades (720). The conveying shaft (710) is rotatably engaged with the feed box (300) and the discharge box (400) respectively. The screw conveying blades (720) are disposed on the outer wall of the conveying shaft (710). The drive end of the conveying shaft (710) is connected to the output end of the first drive motor via belt drive.

3. The external spiral dust waste heat recovery device according to claim 1, characterized in that: The rotary crushing mechanism (500) includes a feed box (310) and two rotary crushing components (510). The feed box (310) is located directly above and connected to the feed box (300). The two rotary crushing components (510) are symmetrically arranged on the feed box (310). Each of the rotary crushing components (510) includes a rotary shaft (513), a crushing roller (511) and a plurality of spiral crushing blades (512). The crushing roller (511) is disposed on the rotary shaft (513), and the plurality of spiral crushing blades (512) are evenly disposed on the outer wall of the crushing roller (511) around its circumference. Each of the rotating shafts (513) has a sprocket tooth structure at its end that meshes with the chain, and is driven by a corresponding second drive motor via chain drive.

4. A device according to claim 3, characterized in that: The two rotary crushing assemblies (510) rotate in opposite directions, and the spiral crushing blades (512) of both have opposite spiral directions.

5. An external screw dust waste heat recovery device according to any one of claims 3-4, characterized in that: The vibrating feeding mechanism (600) includes a vibrating feeding pipe (650), an annular support seat (620), two elastic support components (630) and two vibrating cylinders (640); The annular support base (620) is disposed on the upper end face of the feed box (310), the vibrating feed pipe (650) is disposed on the inner side of the annular support base (620), the inner wall of the annular support base (620) is provided with an annular sealing baffle that cooperates with and seals the outer wall of the vibrating feed pipe (650), and the top of the vibrating feed pipe (650) is provided with a first flange plate (610). Two elastic support components (630) are symmetrically arranged on the upper end face of the annular support base (620), and the first flange plate (610) is slidably connected to the elastic support components (630); two vibration cylinders (640) are symmetrically arranged on the upper end face of the annular support base (620), and their output ends are connected to the first flange plate (610). The upper part of the inner wall of the vibrating feed pipe (650) is provided with multiple sealing rings.

6. The external spiral dust waste heat recovery device according to claim 5, characterized in that: The feed pipe is located inside the vibrating feed pipe (650) and arranged coaxially. The top of the feed pipe is provided with a second flange plate (320). The bottom of the vibrating feed pipe (650) has a constricted structure, and the constricted structure is located between the two rotary crushing components (510).

7. A device according to claim 5, characterized in that: Each of the elastic support components (630) includes a guide slide rod and two springs. The bottom of the guide slide rod is threadedly connected to the annular support seat (620) and slidably engaged with the first flange plate (610). The two springs are respectively disposed on the upper and lower sides of the first flange plate (610) and are both sleeved on the outside of the guide slide rod; The guide slide is provided with a limiting block at the top, and a limiting nut that is threadedly engaged with the guide slide is provided on its upper part. The limiting nut is located on the top of the spring located at the upper part.

8. A device according to claim 5, characterized in that: The outer wall of the spiral coil (200) is provided with spiral fins.

9. An external spiral dust waste heat recovery device according to claim 5, characterized in that: The heat transfer medium inlet (110) is located at one end near the discharge box (400), and the heat transfer medium outlet (120) is located at one end near the feed box (300) to form countercurrent heat exchange opposite to the dust conveying direction, thereby achieving efficient cooling and waste heat recovery of high-temperature dust.

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