Industrial boiler using waste heat for slagging

Abstract

The utility model discloses an industrial boiler utilizes the residue discharging device of waste heat, relates to the technical field of boiler residue discharging auxiliary equipment, including the water tank for storing cooling water in the box one side. The industrial boiler utilizes the residue discharging device of waste heat, and through the shaking flat mechanism drive shaking board, the accumulated furnace slag is pressed down, lateral flattening and horizontal reciprocating shaking, eliminates the bridging and the gap, makes it even flatly on the water cooling board surface, and the stirring mechanism integrated in the flat action cuts the surface layer big piece of furnace slag immediately, guarantees the evenness of laying the residue, and the evenly spreaded furnace slag is in full contact with the water cooling board, and the first high -efficient direct heat exchange is completed, absorbs most high -temperature sensible heat, then, in the unloading process of transmission mechanism and material conveying oar drive, the residual heat of furnace slag is absorbed again by water cooling partition chamber, realizes two -class waste heat recovery, and this even residue, immediate crushing, two -stage gradient cooling collaborative operation solve the problem of local overheating and low heat exchange efficiency caused by uneven slag layer, caking.

Description

Technical Field

[0001] This invention relates to the field of boiler ash removal auxiliary equipment technology, specifically to an industrial boiler ash removal device utilizing waste heat. Background Technology

[0002] Industrial boilers are divided into two types: one is steam, which is used for power generation or gas supply. For example, fertilizer plants can use steam to gasify coal to synthesize fertilizer. When industrial boilers are in use, they will generate a certain amount of waste residue. Boilers are often equipped with a variety of auxiliary equipment. At this time, an auxiliary slag discharge device is needed to effectively recover the waste heat generated by the boiler waste residue, improve the boiler's energy utilization efficiency, significantly reduce energy consumption, reduce environmental pollution, and improve the overall operating efficiency of the boiler.

[0003] Existing patent CN113915602A discloses an industrial boiler waste heat ash removal device, which solves the problem that in the existing technology, the waste ash is usually treated by soaking in water to cool it down during the boiler ash removal process. This traditional method not only wastes a lot of water resources, but also causes environmental pollution and a lot of heat is not utilized, resulting in energy waste. The industrial boiler waste heat ash removal device includes a box, with a support frame fixedly connected to the inner side of the box, and a discharge pipe embedded on one side of the support frame, and the discharge pipe passes through the support frame. The method proposed in this invention uses crushing rollers to crush the ash, which can make the heat of the ash dissipate better. At the same time, the movement of the first support pipe and the second support pipe can further facilitate the absorption of heat from the ash by water, greatly enhance the heat conversion effect of the ash, and avoid waste of water resources and environmental pollution.

[0004] According to the aforementioned patent, the waste slag is cooled and then directly discharged through the support frame. However, during the cooling process, due to the unevenness of the slag particles, large slag particles often accumulate on top of small slag particles, forming a loose, gap-filled insulation layer inside the slag layer. Heat is difficult to be efficiently transferred to the surface of the water-cooled plate. At the same time, the device only relies on the support frame for one cooling operation, and the sensible heat of the slag is not fully recovered, which easily leads to heat loss and low waste heat utilization rate. Therefore, we propose an industrial boiler waste heat slag discharge device. Summary of the Invention

[0005] The purpose of this invention is to provide a waste heat ash removal device for industrial boilers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an industrial boiler waste heat slag discharge device, comprising a water tank for storing cooling water located on one side of the box body, a stable supporting frame fitted below both the box body and the water tank, a processing chamber for cooling and absorbing heat from the slag opened inside the box body, a columnar unloading chamber opened in the center of the box body below the processing chamber, two symmetrically distributed water-cooled plates arranged inside the processing chamber, and a water-cooled baffle for water flow opened in the inner wall of the box body outside the unloading chamber;

[0007] A water supply assembly for conveying and recovering cooling water is connected between the water-cooled plate, the water-cooled cavity, and the water tank. The top of the tank above the water-cooled plate is provided with a shaking and flattening mechanism for shaking and flattening the accumulated slag. The bottom of the shaking and flattening mechanism is connected with a shaking plate for squeezing the slag. The shaking and flattening mechanism includes a slider and a limiting protrusion for driving the shaking plate to move laterally and a pressing plate for crushing the slag. The shaking plate and the pressing plate are provided with a crushing mechanism for breaking up large pieces of slag at the top of the slag pile.

[0008] The crushing mechanism includes a crushing paddle for crushing slag and a crushing gear for driving the crushing paddle to rotate.

[0009] Preferably, one end of the top of the frame is bolted to a slag inlet hopper that connects to the boiler slag discharge port. The box body consists of a top plate and a bottom box, and the top plate and the bottom box are connected by sealing bolts for easy inspection and maintenance. An inclined slag discharge port is provided on one side of the bottom box of the box body.

[0010] Preferably, the water supply assembly includes a water pump that is installed on the top of the water tank via pipes and bolts. Both ends of the water-cooled plate are connected to integrally formed rotating shafts, and the rotating shafts are connected to the inner wall of the tank via bearings. The water-cooled partition is sleeved on the outside of the unloading chamber, and a water supply pipe that penetrates the inner wall of the tank is connected to one side of the water-cooled partition.

[0011] The other side of the water-cooled cavity is connected to a No. 2 water outlet pipe that runs through the inner wall of the box. A water inlet pipe assembly is connected between the water supply pipe, the rotating shaft and the water pump. A rotary sealing joint is installed at the end of the rotating shaft. The water inlet pipe assembly includes a pipe with three outlets connected to the water pump via a flange. Two of the outlets of the pipe are connected to the rotary sealing joint via flexible hoses, and the remaining outlet is connected to the water supply pipe via a flexible hose. The side of the rotating shaft away from the water inlet pipe assembly is connected to a No. 1 water outlet pipe via a sealing joint.

[0012] Preferably, the outer sides of the two ends of the rotating shaft are welded with gear discs that mesh with each other, and a synchronous pulley assembly for driving the gear discs to rotate synchronously is installed on the outside of the rotating shaft on one side of the gear disc. A side box for protecting the synchronous pulley assembly and the gear disc is installed on one side of the outer wall of the housing by bolts.

[0013] Preferably, the swaying and flattening mechanism further includes sliders fixed to both ends of the swaying plate. A pressure plate is provided on the outer side of the slider. A strip groove is provided on both inner walls of the pressure plate for the slider to slide through. A sliding rod is welded inside the strip groove to form a sliding sleeve structure with the slider.

[0014] The slide bar is fitted with support springs on both sides of the slide block, with its ends abutting against the inner wall between the slide block and the pressure plate. The end of the slide block located above the pressure plate is connected to a roller via a bearing, which drives the swaying plate to move laterally.

[0015] Preferably, a limiting protrusion is provided between the two rollers, which is in close contact with the roller rolling surface, and the limiting protrusion is designed with a wave-shaped structure. A wave-shaped limiting groove is provided on the inner wall of the box, and the bottom inner wall of the limiting groove is designed to be inclined to prevent waste residue from accumulating. The limiting protrusion is located at the center of the limiting groove and is welded to the inner wall of the box.

[0016] Preferably, the top of the pressure plate is bolted to a hydraulic cylinder that drives the swaying plate to move downward and a guide rod that stabilizes and guides the downward movement. The hydraulic cylinder is bolted to the top of the housing, and the guide rod slides through the top of the housing.

[0017] Preferably, the shredding mechanism includes racks that are bolted to both ends of the inner cavity of the pressure plate, and one side of the racks is meshed with a shredding gear that moves laterally and rotates on its own axis;

[0018] The crushing gear is fitted with a crushing paddle for crushing slag at its center. The bottom of the crushing paddle is provided with ring-shaped blades. The crushing paddle and the shaking plate are connected through a bearing. The surface of the shaking plate is welded with a rake plate that alternates with the crushing paddle and flattens the slag.

[0019] Preferably, the unloading chamber is equipped with a conveying paddle for assisting slag feeding. The conveying paddle consists of ring-shaped blades and a spiral plate, with the blades located above the spiral plate. The bottom end of the conveying paddle is connected to a transmission mechanism. A protective frame is welded to the inner wall of the slag outlet, and the transmission mechanism is located inside the protective frame.

[0020] Preferably, the transmission mechanism includes a first bevel gear welded to the end of the feed paddle, a second bevel gear meshing with one side of the first bevel gear, and a transmission shaft that passes through the inner side of the protective frame via a bearing welded to the inner side of the second bevel gear.

[0021] The two bevel gears are arranged in opposite directions. The end of the drive shaft is connected to a motor via a coupling. A slot is provided on the inner wall of the housing, and the motor is installed in the slot on the inner wall of the housing by bolts.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The device drives the shaking plate through the shaking and spreading mechanism to press down, spread laterally and shake horizontally the accumulated slag, eliminating bridging and gaps, so that it is evenly spread on the surface of the water-cooled plate. The crushing mechanism integrated in the spreading action cuts and crushes the large pieces of slag on the surface in real time, ensuring the uniformity of slag spreading. The evenly spread slag is in full contact with the water-cooled plate to complete the first-stage high-efficiency direct heat exchange, absorbing most of the high-temperature sensible heat. Subsequently, during the unloading process driven by the transmission mechanism and the conveying paddle, the residual heat of the slag is absorbed again by the water-cooled cavity to achieve the second-stage waste heat recovery. The uniform slag spreading, real-time crushing and two-stage gradient cooling work together to significantly increase the effective heat exchange area and solve the problems of local overheating and low heat exchange efficiency caused by uneven slag layer and agglomeration.

[0023] 1. This industrial boiler utilizes a waste heat slag discharge device. The water-cooled plate rotates synchronously with the gear disc through the rotating shafts at both ends. After the slag has cooled, the water-cooled plate can be flipped to pour the cooled slag into the discharge chamber below, achieving rapid and thorough discharge and ensuring efficient and automatic connection between the cooling and slag discharge processes.

[0024] 2. This industrial boiler utilizes a waste heat slag discharge device. The combined motion of the shaking and spreading mechanism and the crushing mechanism simultaneously achieves uniform spreading and large-piece crushing of the slag, eliminating bridging and gaps caused by slag accumulation, ensuring uniform slag layer thickness, and thus significantly increasing its effective heat exchange area with the water-cooled plate. This avoids the situation where high-temperature slag is trapped inside and cannot dissipate heat, resulting in more uniform and thorough heat release. Consequently, under the same flow rate, the outlet hot water temperature is higher and more stable, improving the utilization value of the hot water.

[0025] 3. This industrial boiler utilizes a waste heat slag discharge device. The opposing rotating conveyor paddle, through the combined action of its upper crushing blades and lower spiral plates, results in better flowability of the crushed slag particles, effectively preventing the cooling slag from agglomerating and clogging during the discharge process. The centripetal thrust generated ensures forced, continuous, and stable slag discharge, guaranteeing smooth slag discharge. Furthermore, the rotating and stirring action of the conveyor paddle fully mixes the slag powder with unburned carbon particles, facilitating subsequent comprehensive utilization. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the water tank structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the overall internal structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the water pipe structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the slag outlet structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the toothed disc structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the side box structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the water-cooled plate structure of the present invention;

[0035] Figure 10 This is a schematic diagram of the internal structure of the water-cooled plate of the present invention;

[0036] Figure 11 This is a schematic diagram of the swaying and flattening mechanism of the present invention;

[0037] Figure 12 This is a schematic diagram of the shaking plate structure of the present invention;

[0038] Figure 13 This is a schematic diagram of the rake tooth plate structure of the present invention;

[0039] Figure 14 This is a schematic diagram of the crushing mechanism of the present invention.

[0040] In the diagram: 1. Housing; 2. Slag hopper; 3. Frame; 4. Slag outlet; 5. Water tank; 6. Water pump; 7. Water inlet pipeline assembly; 8. Shaking and spreading mechanism; 801. Press plate; 802. Support spring; 803. Roller; 804. Limiting ridge; 805. Sliding block; 806. Sliding rod; 9. Crushing mechanism; 901. Rack; 902. Crushing paddle; 903. Crushing gear; 10. Rotating shaft; 11. Guide rod; 12. Hydraulic cylinder; 13. 14. Water supply pipe; 15. No. 1 water outlet pipe; 16. No. 2 water outlet pipe; 17. Water-cooled plate; 18. Processing chamber; 19. Unloading chamber; 20. Water-cooled partition chamber; 21. Motor; 22. Transmission mechanism; 2101. Drive shaft; 2102. No. 1 bevel gear; 2103. No. 2 bevel gear; 22. Feeding paddle; 23. Protective frame; 24. Side box; 25. Synchronous belt pulley assembly; 26. Gear plate; 27. Limiting groove; 28. Shaking plate; 29. ​​Rake tooth plate. Detailed Implementation

[0041] 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.

[0042] Please see Figures 1-4 and Figure 6 The present invention provides a technical solution: an industrial boiler waste heat ash removal device, including a water tank 5 for storing cooling water located on one side of the box body 1. A stable support frame 3 is sleeved under both the box body 1 and the water tank 5. One end of the top of the frame 3 is bolted to a ash inlet hopper 2 that connects to the boiler ash discharge port. The box body 1 is composed of a top plate and a bottom box, and the top plate and the bottom box are connected by sealing bolts for easy inspection and maintenance. An inclined ash discharge port 4 is opened on one side of the bottom box of the box body 1.

[0043] In practice, high-temperature slag falls continuously into the box 1, which consists of a top plate and a bottom box, through the slag hopper 2. The frame 3 provides stable support for the entire device. The detachable structure of the box 1 makes it easy to disassemble the top plate during maintenance to inspect or clean the internal water-cooling plate 16, unloading mechanism, etc. The cooled slag is finally discharged through the inclined slag outlet 4. The inclination angle allows the slag to slide out by gravity, avoiding accumulation.

[0044] See Figures 1-4 and Figures 7-10 It is known that a water pump 6 for pressurizing and transporting cooling water is installed on the top of the water tank 5 through pipes and bolts. The inside of the tank body 1 is provided with a treatment chamber 17 for cooling and absorbing heat from the slag. A columnar unloading chamber 18 is provided in the center of the inside of the tank body 1 below the treatment chamber 17. The treatment chamber 17 is provided with two symmetrically distributed water-cooled plates 16. The water-cooled plates 16 have cavities for the flow of cooling water. The water-cooled plates 16 support the slag and absorb heat for cooling. Both ends of the water-cooled plates 16 are connected to an integrally formed rotating shaft 10, and the rotating shaft 10 is connected to the inner wall of the tank body 1 through bearings.

[0045] The inner wall of the housing 1 located outside the unloading chamber 18 has a water-cooled partition 19 for water supply. The water-cooled partition 19 is a ring around the outside of the unloading chamber 18. One side of the water-cooled partition 19 is connected to a water supply pipe 13 that runs through the inner wall of the housing 1, and the other side of the water-cooled partition 19 is connected to a second water outlet pipe 15 that runs through the inner wall of the housing 1. A water inlet pipe assembly 7 is connected between the water supply pipe 13, the rotating shaft 10 and the water pump 6. A rotary sealing joint is installed at the end of the rotating shaft 10. The water inlet pipe assembly 7 includes a pipe with three outlets connected above the water pump 6 by a flange. Two of the outlets of the pipe are connected to the rotary sealing joint by hoses, and the remaining outlet is connected to the water supply pipe 13 by a hose.

[0046] In practice, the water pump 6 is started to draw cooling water from the water tank 5. The cooling water is split through the inlet pipe assembly 7. One path enters the two rotating shafts 10 through the hose and rotary sealing joint, and then flows into the cavity inside the water-cooled plate 16. The other path enters the water-cooled partition 19 through the hose and water pipe 13. The high-temperature slag falls into the processing chamber 17 and accumulates on the water-cooled plate 16. Its heat is absorbed by the cooling water flowing inside the water-cooled plate 16. At the same time, the cooling water in the water-cooled partition 19 absorbs the residual heat of the slag after the initial cooling by the water-cooled plate 16 and the ambient radiant heat. The cooled water after absorbing heat is discharged from the first outlet pipe 14 and the second outlet pipe 15 for use.

[0047] By using parallel water channels for two-stage cooling of the slag—one through direct contact and the other through indirect isolation—efficient and gradient recovery of waste heat is achieved.

[0048] See Figures 1-3 and Figures 7-9 It can be seen that the side of the rotating shaft 10 away from the water inlet pipe assembly 7 is connected to the No. 1 water outlet pipe 14 through a sealing joint. The No. 1 water outlet pipe 14 and the No. 2 water outlet pipe 15 are both connected to the external water suction pump equipment. The outer sides of the two ends of the rotating shaft 10 are welded with toothed discs 26 that mesh with each other. The rotating shaft 10 is mounted on the outside of the toothed disc 26 on one side to drive the toothed disc 26 to rotate synchronously. The side box 24 that protects the synchronous pulley assembly 25 and the toothed disc 26 is bolted to the outer wall of one side of the housing 1. The ends of the two water-cooled plates 16 that meet each other are provided with arc-shaped edges that do not hinder the flipping.

[0049] In practice, the cooling water that has absorbed heat and heated up flows out from the water-cooled plate 16, collects inside the rotating shaft 10, and is discharged from the first water outlet pipe 14 through the sealed joint. The hot water in the water-cooled cavity 19 is discharged from the second water outlet pipe 15. The motor that drives the synchronous belt pulley assembly 25 is started, and one of the rotating shafts 10 is driven to rotate through the synchronous belt. The gear plate 26 at the end of the rotating shaft 10 rotates accordingly and meshes with the gear plate 26 at the end of the other rotating shaft 10, so that the two water-cooled plates 16 can rotate synchronously and in opposite directions. The side box 24 protects the synchronous belt pulley assembly 25 and the gear plate 26.

[0050] The water-cooled plate 16 is synchronously rotated in opposite directions with the gear plate 26 via the rotating shafts 10 at both ends. After the slag is cooled, the water-cooled plate 16 can be rotated to pour the cooled slag into the discharge chamber 18 below, achieving fast and thorough discharge and ensuring efficient and automatic connection between the cooling and slag discharge processes.

[0051] See Figure 3 and Figures 11-14 It is known that the top of the box body 1 above the water-cooled plate 16 is provided with a shaking and flattening mechanism 8 for shaking and flattening the accumulated slag, and the bottom of the shaking and flattening mechanism 8 is connected to a shaking plate 28 for squeezing the slag. The shaking and flattening mechanism 8 includes sliders 805 fixed at both ends of the shaking plate 28, and a pressing plate 801 is provided on the outer side of the sliders 805.

[0052] The inner walls of both sides of the pressure plate 801 are provided with strip-shaped grooves for the slider 805 to slide through. The inside of the strip-shaped grooves is welded with a slide rod 806 that forms a sliding sleeve structure with the slider 805. The slide rod 806 is sleeved with a support spring 802 on both sides of the slider 805, the end of which abuts between the slider 805 and the inner wall of the pressure plate 801.

[0053] In practice, when the shaking plate 28 contacts the top of the slag pile, it continues to press down, pushing the slag that is piled up higher downwards, forcing the slag to slide down from the center to both sides of the water-cooled plate 16 and spread out to form a relatively flat material layer. At the same time, the slider 805 slides along the slide rod 806 in the strip groove of the pressure plate 801, and the support springs 802 on both sides are compressed or stretched, providing the shaking plate 28 with horizontal displacement space and reset elasticity.

[0054] During the downward pressing process, the shaking plate 28 can overcome the resistance of the slag and achieve a slight horizontal displacement, which generates a certain lateral stirring and flat pressing effect on the slag, thereby accelerating the slag spreading process and avoiding the local compaction or void that may be formed by simple vertical compaction. This allows the slag to be spread more quickly and evenly on the surface of the water-cooled plate 16, increasing the effective heat exchange area.

[0055] See Figures 11-14It is known that the end of the slider 805 located above the pressure plate 801 is connected to a roller 803 via a bearing, which drives the swaying plate 28 to move laterally. Between the two rollers 803, there is a limiting protrusion 804 that is in close contact with the rolling surface of the roller 803, and the limiting protrusion 804 is designed with a wave-shaped structure. A wave-shaped limiting groove 27 is opened on the inner wall of the box 1, and the bottom inner wall of the limiting groove 27 is designed to be inclined to prevent slag from accumulating. The limiting protrusion 804 is located at the center of the limiting groove 27 and is welded to the inner wall of the box 1. The roller 803 rolls on the outer edges of the limiting protrusion 804 on both sides, and the distance between the two edges of the limiting groove 27 and the two outer edges of the limiting protrusion 804 is the diameter of the roller 803. The slag that splashes onto the limiting protrusion 804 can fall off by the rolling action of the roller 803, and there will be no large amount of slag accumulating and affecting the rolling of the roller 803.

[0056] In practice, during the downward movement of the pressure plate 801, the rollers 803 on both sides roll along the wave-shaped limiting protrusions 804 fixed to the inner wall of the box 1. Since the limiting protrusions 804 are in a continuous wave shape, the rollers 803 are forced to generate a periodic horizontal displacement by the curved surface of the protrusions while moving vertically downward. This horizontal displacement drives the entire shaking plate 28 to make horizontal reciprocating swaying in the processing cavity 17 through the slider 805.

[0057] This shaking action, when applied to slag piles, can flatten their surface, eliminate pile tips and voids, make the material layer thickness distribution more uniform, further optimize the overall heat exchange conditions, and achieve the integration of compaction and flattening functions.

[0058] This avoids the situation where high-temperature slag is trapped inside and cannot dissipate heat, resulting in more even and thorough heat release. Consequently, under the same flow rate, the outlet hot water temperature is higher and more stable, thus improving the utilization value of the hot water.

[0059] See Figures 1-3 and Figure 11 It is known that the top of the pressure plate 801 is connected by bolts to a hydraulic cylinder 12 that drives the swaying plate 28 to move downward and a guide rod 11 that stabilizes and guides the downward movement. The hydraulic cylinder 12 is installed on the top of the box 1 by bolts, and the guide rod 11 slides through the top of the box 1.

[0060] In practice, the hydraulic cylinder 12 is activated, and its piston rod pushes the pressure plate 801 and the swaying plate 28 connected to its bottom to move vertically downward along the guide rod 11.

[0061] See Figures 11-14It is known that the shaking plate 28 and the pressing plate 801 are equipped with a crushing mechanism 9 for crushing large pieces of slag at the top of the slag pile. The crushing mechanism 9 includes a rack 901 that is bolted to both ends of the inner cavity of the pressing plate 801. A crushing gear 903 that moves laterally and rotates is meshed on one side of the rack 901.

[0062] The crushing gear 903 is fitted with a crushing paddle 902 for crushing slag at its center. The bottom of the crushing paddle 902 is provided with ring-shaped blades. The crushing paddle 902 is connected to the shaking plate 28 through a bearing. The surface of the shaking plate 28 is welded with a rake tooth plate 29 that is alternately distributed with the crushing paddle 902 and flattens the slag.

[0063] In specific implementation, during the process of hydraulic cylinder 12 driving the pressing plate 801 and the swaying plate 28 to compact the slag downwards, the racks 901 at both ends of the inner cavity of the pressing plate 801 move downwards together. Since the racks 901 are fixed relative to the pressing plate 801, and the whole assembly of the crushing gear 903 and the crushing paddle 902 is mounted on the horizontally swaying swaying plate 28 through bearings, when the swaying plate 28 is horizontally swayed by the limiting protrusion 804, the crushing gear 903 mounted on it moves horizontally relative to the fixed rack 901. The meshing relationship between the rack 901 and the crushing gear 903 converts the horizontal movement of the crushing gear 903 into its own rotational motion, thereby driving the crushing paddle 902 and the blades at its bottom to rotate. The rotating blades cut and crush the slag accumulated below the swaying plate 28 and above the water-cooled plate 16, especially the larger lumps of slag on the surface.

[0064] The horizontal swaying motion of the swaying and spreading mechanism 8 is used as a power source to drive the crushing mechanism 9 to work, which realizes the crushing of large pieces of slag while spreading the slag, preventing large pieces of slag from affecting the heat exchange uniformity and subsequent slag discharge. The rake tooth plate 29 disperses the slag when it moves laterally, which accelerates the slag spreading rate.

[0065] See Figures 3-6 It is known that the unloading chamber 18 is equipped with a conveying paddle 22 for assisting slag feeding. The conveying paddle 22 is composed of ring-shaped blades and spiral plates, with the blades located above the spiral plates. The bottom end of the conveying paddle 22 is connected to a transmission mechanism 21. A protective frame 23 is welded on the inner wall of the slag outlet 4, and the transmission mechanism 21 is located inside the protective frame 23.

[0066] In specific implementation, the transmission mechanism 21 is activated to drive the conveying paddle 22 to rotate in the unloading chamber 18. When the cooled slag falls from the upper processing chamber into the unloading chamber 18, it first contacts the annular blades on the upper part of the conveying paddle 22. The rotating blades can effectively break up the lumps or larger particles in the slag, preventing them from blocking the lower channel. The broken slag continues to fall under the action of gravity and enters the spiral plate area at the lower part of the conveying paddle 22. The spiral plate, which rotates in the opposite direction, generates axial thrust, continuously and steadily pushing the slag towards the slag outlet 4, ensuring smooth slag discharge and avoiding accumulation at the bottom of the chamber. This solves the problem of poor discharge caused by lumps or internal friction of the cooled slag, ensuring the continuity and reliability of the slag discharge process. The small slag particles after crushing have better fluidity, effectively preventing the lumps and blockage of the cooled slag during the discharge process. Through the rotating stirring action of the conveying paddle 22, the slag powder and unburned carbon particles are fully mixed, which is beneficial for subsequent comprehensive utilization.

[0067] During this process, the waste heat of the slag is continuously absorbed by the surrounding water-cooled cavity 19, realizing secondary waste heat recovery and improving energy utilization.

[0068] See Figures 3-6 It is known that the transmission mechanism 21 includes a first bevel gear 2102 welded to the end of the conveying paddle 22. A second bevel gear 2103 is meshed with one side of the first bevel gear 2102. A transmission shaft 2101, which passes through the inner side of the protective frame 23 via a bearing, is welded to the inner side of the second bevel gear 2103. The two second bevel gears 2103 are arranged in opposite directions. The end of the transmission shaft 2101 is connected to a motor 20 via a coupling. A slot is opened on the inner wall of the housing 1, and the motor 20 is installed in the slot on the inner wall of the housing 1 by bolts.

[0069] In practice, the motor 20 is started, and the output shaft of the motor 20 drives the transmission shaft 2101 to rotate through the coupling. The transmission shaft 2101 drives the two second bevel gears 2103 on it to rotate synchronously. Since the two second bevel gears 2103 are arranged in opposite directions, they drive the two first bevel gears 2102 that mesh with them to rotate in opposite directions. The first bevel gears 2102 are welded to the end of the conveying paddle 22, thereby driving the two conveying paddles 22 to rotate synchronously and in opposite directions in the unloading chamber 18. The protective frame 23 supports the transmission shaft 2101 through bearings to ensure its smooth operation.

[0070] Using a single motor 20 to drive the dual-axis counter-rotation not only saves installation space and energy consumption, but also allows the counter-rotating spiral plates to more effectively gather the slag towards the center and push it downwards.

[0071] In summary, when using the waste heat slag discharge device of this industrial boiler, high-temperature slag falls into the processing chamber 17 of the housing 1 through the slag inlet hopper 2 and accumulates on the water-cooled plate 16. Cooling water performs two-stage gradient cooling on the slag through the inner cavity of the water-cooled plate 16 and the surrounding water-cooled partition 19 to recover waste heat. At the same time, the shaking and spreading mechanism 8 drives the shaking plate 28 to press down, spread and shake the slag horizontally, and links the crushing mechanism 9 to break up large pieces of slag, ensuring uniform and sufficient heat exchange. After cooling is completed, the water-cooled plate 16 flips over to pour the slag into the discharge chamber 18, where it is crushed and forcibly pushed by the oppositely rotating conveying paddle 22 and discharged through the slag outlet 4. The contents not described in detail in this description belong to the prior art known to those skilled in the art.

Claims

1. An industrial boiler waste heat ash removal device, comprising a water tank (5) for storing cooling water located on one side of a housing (1), wherein a stable supporting frame (3) is fitted under both the housing (1) and the water tank (5), characterized in that: The box (1) has a processing chamber (17) for cooling and absorbing heat from the slag inside. The box (1) has a columnar unloading chamber (18) located in the center below the processing chamber (17). The processing chamber (17) has two symmetrically distributed water-cooled plates (16) inside. The box (1) has a water-cooled partition (19) for water flow in the inner wall outside the unloading chamber (18). A water conveying assembly for conveying and recovering cooling water is connected between the water-cooled plate (16), the water-cooled cavity (19), and the water tank (5). The top of the tank (1) above the water-cooled plate (16) is provided with a shaking and flattening mechanism (8) for shaking and flattening the piled slag. The bottom of the shaking and flattening mechanism (8) is connected with a shaking plate (28) for squeezing the slag. The shaking and flattening mechanism (8) includes a slider (805) and a limiting protrusion (804) for driving the shaking plate (28) to move and shake laterally, and a pressing plate (801) for crushing the slag. The shaking plate (28) and the pressing plate (801) are provided with a crushing mechanism (9) for breaking up large pieces of slag at the top of the slag pile. The crushing mechanism (9) includes a crushing paddle (902) for crushing slag and a crushing gear (903) for driving the crushing paddle (902) to rotate.

2. The waste heat ash removal device for industrial boilers according to claim 1, characterized in that: The top end of the frame (3) is connected to the slag inlet hopper (2) of the boiler slag discharge port by bolts. The box (1) consists of a top plate and a bottom box, and the top plate and the bottom box are connected by sealing bolts for easy inspection and maintenance. The bottom box of the box (1) has an inclined slag outlet (4) on one side.

3. The waste heat ash removal device for industrial boilers according to claim 1, characterized in that: The water supply assembly includes a water pump (6) installed on the top of the water tank (5) via pipes and bolts. Both ends of the water-cooled plate (16) are connected to integrally formed rotating shafts (10), and the rotating shafts (10) are connected to the inner wall of the box body (1) via bearings. The water-cooled partition (19) is sleeved on the outside of the unloading chamber (18), and one side of the water-cooled partition (19) is connected to a water supply pipe (13) that penetrates the inner wall of the box body (1). The other side of the water-cooled cavity (19) is connected to a second water outlet pipe (15) that runs through the inner wall of the box (1). The water supply pipe (13), the rotating shaft (10) and the water pump (6) are connected by an inlet pipe assembly (7). The end of the rotating shaft (10) is equipped with a rotary sealing joint. The inlet pipe assembly (7) includes a pipe with three outlets connected above the water pump (6) by a flange. Two outlets of the pipe are connected to the rotary sealing joint by a hose, and the remaining outlet is connected to the water supply pipe (13) by a hose. The side of the rotating shaft (10) away from the inlet pipe assembly (7) is connected to a first water outlet pipe (14) by a sealing joint.

4. The waste heat ash removal device for industrial boilers according to claim 3, characterized in that: The outer sides of the two shafts (10) are welded with toothed discs (26) that mesh with each other. The shafts (10) are mounted on the outside of the toothed discs (26) to drive the toothed discs (26) to rotate synchronously. A side box (24) is bolted to the outer wall of one side of the housing (1) to protect the synchronous pulley assembly (25) and the toothed discs (26).

5. The waste heat ash removal device for industrial boilers according to claim 1, characterized in that: The swaying and flattening mechanism (8) also includes sliders (805) fixed at both ends of the swaying plate (28). The outer side of the slider (805) is provided with a pressure plate (801). The inner walls on both sides of the pressure plate (801) are provided with strip grooves for the slider (805) to slide through. The inside of the strip grooves is welded with a sliding rod (806) that forms a sliding sleeve structure with the slider (805). The slide bar (806) is fitted with a support spring (802) on both sides of the slider (805), with its end abutting between the inner wall of the slider (805) and the pressure plate (801). The end of the slider (805) above the pressure plate (801) is connected by a roller (803) through a bearing to drive the swaying plate (28) to move laterally.

6. The waste heat ash removal device for industrial boilers according to claim 5, characterized in that: A limiting protrusion (804) is provided between the two rollers (803) and is in close contact with the rolling surface of the rollers (803). The limiting protrusion (804) is designed with a wave-shaped structure. A wave-shaped limiting groove (27) is provided on the inner wall of the box (1). The bottom inner wall of the limiting groove (27) is designed with an inclined shape to prevent waste residue from accumulating. The limiting protrusion (804) is located at the center of the limiting groove (27) and is welded to the inner wall of the box (1).

7. The waste heat ash removal device for industrial boilers according to claim 6, characterized in that: The top of the pressure plate (801) is connected by bolts to a hydraulic cylinder (12) that drives the swaying plate (28) to move downward and a guide rod (11) that stably guides the downward movement. The hydraulic cylinder (12) is bolted to the top of the box (1), and the guide rod (11) slides through the top of the box (1).

8. The waste heat ash removal device for industrial boilers according to claim 1, characterized in that: The shredding mechanism (9) includes a rack (901) that is bolted to both ends of the inner cavity of the pressure plate (801), and a shredding gear (903) that moves laterally and rotates is meshed on one side of the rack (901). The slag-crushing gear (903) is welded to the center with a slag-crushing paddle (902). The bottom end of the slag-crushing paddle (902) is provided with ring-shaped blades. The slag-crushing paddle (902) and the shaking plate (28) are connected through a bearing. The surface of the shaking plate (28) is welded with a rake tooth plate (29) that forms an alternating distribution with the slag-crushing paddle (902) and flattens the slag.

9. The waste heat ash removal device for industrial boilers according to claim 2, characterized in that: The unloading chamber (18) is equipped with a conveying paddle (22) for assisting slag feeding. The conveying paddle (22) consists of a ring-shaped distribution of blades and a spiral plate, with the blades located above the spiral plate. The bottom end of the conveying paddle (22) is connected to a transmission mechanism (21). A protective frame (23) is welded to the inner wall of the slag outlet (4), and the transmission mechanism (21) is located inside the protective frame (23).

10. The waste heat ash removal device for industrial boilers according to claim 9, characterized in that: The transmission mechanism (21) includes a first bevel gear (2102) welded to the end of the feed paddle (22), a second bevel gear (2103) meshing with one side of the first bevel gear (2102), and a transmission shaft (2101) welded to the inner side of the second bevel gear (2103) through a bearing and passing through the inner side of the protective frame (23). The two bevel gears (2103) are arranged in opposite directions. The end of the drive shaft (2101) is connected to a motor (20) via a coupling. A slot is provided on the inner wall of the housing (1), and the motor (20) is installed in the slot on the inner wall of the housing (1) by bolts.

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