Waste heat utilization device of industrial boiler and boiler waste heat utilization method
By installing heat-conducting ball bearings and agitation components inside the flue gas pipeline, the problems of dust deposition and insufficient heat exchange in the flue gas are solved, achieving efficient waste heat utilization and continuous boiler operation.
Patent Information
- Application Number
- CN202511443627.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2025-11-21
AI Technical Summary
In existing waste heat recovery devices for industrial boilers, dust particles in the flue gas tend to deposit on the heat exchange tube walls, forming an ash layer that reduces heat exchange efficiency and corrodes the tube walls. At the same time, the fixed structure leads to insufficient heat exchange between the flue gas and the heat exchange medium, and the ash removal method affects the continuous operation of the boiler.
The system employs heat-conducting balls and a tumbling assembly installed inside the flue gas pipeline. A drive assembly drives a tumbling auger to tumble the heat-conducting balls, thereby transferring heat and removing impurities from the inner wall of the flue gas pipeline. Combined with a drive switching mechanism, the balls are automatically replaced and cleaned.
It improves the heat exchange efficiency between flue gas and heat exchange medium, avoids corrosion of flue gas pipelines, and enables continuous operation of boilers and reduces maintenance costs.
Smart Images
Figure CN120991320A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of industrial boiler heat exchange technology, specifically to a waste heat utilization device and method for industrial boilers. Background Technology
[0002] Industrial boilers, as widely used thermal energy equipment, generate a large amount of high-temperature flue gas during operation, and the waste heat resources contained therein have significant recovery value. Effectively utilizing boiler flue gas waste heat can not only improve energy efficiency and reduce fuel consumption, but also reduce thermal pollution, which is in line with the green development requirements of energy conservation and emission reduction.
[0003] Currently, common boiler waste heat recovery devices typically employ heat exchange tubes or fins installed in the flue to recover heat through heat exchange between flue gas and a heat exchange medium (usually water). However, these traditional devices have some inherent drawbacks: First, dust particles in the flue gas easily deposit on the walls of the heat exchange tubes, forming an ash layer that not only reduces heat exchange efficiency but also corrodes the tube walls, shortening the equipment's lifespan. Second, the fixed heat exchange structure results in insufficient heat exchange between the flue gas and the heat exchange medium, especially when flue gas flow or temperature fluctuates, further reducing heat exchange efficiency. Furthermore, existing ash removal methods mostly involve mechanical cleaning or purging after shutdown, affecting continuous boiler operation and increasing maintenance costs. Summary of the Invention
[0004] Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a waste heat utilization device and method for industrial boilers. It features the advantage of transferring heat to the water between the flue gas pipeline and the heat exchange chamber during turbulence within the flue gas pipeline. Simultaneously, the turbulence dislodges soot and other impurities from the inner wall of the flue gas pipeline, preventing corrosion caused by their adhesion. This invention solves the problems of dust particles in the flue gas easily depositing on the heat exchange tube wall, forming an ash layer that not only reduces heat exchange efficiency but also corrodes the tube wall and shortens equipment lifespan, as well as the insufficient heat exchange between the flue gas and the heat exchange medium due to a fixed heat exchange structure.
[0005] (II) Technical Solution To address the technical problems mentioned above, such as dust particles in flue gas easily depositing on the heat exchange tube walls, forming an ash layer that not only reduces heat exchange efficiency but also corrodes the tube walls and shortens equipment lifespan, and the fixed heat exchange structure resulting in insufficient heat exchange between flue gas and the heat exchange medium, this invention provides the following technical solution: a waste heat utilization device for an industrial boiler, comprising a boiler body, a heat exchange chamber in the middle section of the boiler body, a combustion chamber at one end of the heat exchange chamber, a flue gas exhaust chamber at the other end of the heat exchange chamber, a flue gas pipeline between the combustion chamber and the flue gas exhaust chamber, and a heat-conducting roller inside the flue gas pipeline. The flue gas duct is equipped with a tumbling assembly, and the heat-conducting ball is located between the flue gas duct and the tumbling assembly. A drive assembly is provided at one end of the flue gas duct and is connected to the tumbling assembly. A drive switching mechanism is provided between the drive assembly and the flue gas duct, and the drive switching mechanism connects the flue gas duct and the drive assembly. The tumbling assembly includes a tumbling auger and cell units. The tumbling auger is located inside the flue gas duct, and the cell units are distributed on the tumbling auger. The tumbling auger has a plurality of slots, and the cell units are arranged at intervals between each slot.
[0006] Preferably, mounting plates are respectively provided between the heat exchange chamber and the combustion chamber and the flue gas emission chamber, the two ends of the flue gas pipeline are respectively mounted on the mounting plates, and the flue gas pipeline is respectively connected to the combustion chamber and the flue gas emission chamber. A flue gas hood is provided at the end of the flue gas emission chamber, and the drive assembly is located inside the flue gas hood.
[0007] Preferably, a ball bearing outlet groove is provided at the bottom of the flue gas pipeline, the ball bearing outlet groove is provided corresponding to the cell, an outlet pipe is connected to the bottom of the ball bearing outlet groove, and a sealing plate is provided on the ball bearing outlet groove, the sealing plate is coaxially rotatable with the flue gas pipeline.
[0008] Preferably, a ratchet is provided on one side of the auger, the ratchet is provided corresponding to the sealing plate, the bending direction of the ratchet is the same as the rotation direction of the auger when the flue gas is discharged, and a return spring is provided on the bent side of the ratchet, the return spring connects the ratchet and the auger, and a limit block is provided on the other side of the ratchet, the limit block is fixed on the auger.
[0009] Preferably, the inner wall of the flue gas pipeline is provided with an installation groove, an arc-shaped guide rod is provided in the installation groove, the sealing plate is slidably disposed in the installation groove, the sealing plate is slidably connected to the arc-shaped guide rod, and the sealing plate is provided with contact points.
[0010] Preferably, the auger is provided with an inclined baffle located at the end of the slot. The inclined baffle is in the opposite direction to the conveying direction of the auger when the flue gas is discharged. When the flue gas is discharged, the heat-conducting balls in a section of the cell roll in the flue gas pipeline. The rotating auger pushes the heat-conducting balls to roll. When the heat-conducting balls move to the slot, they hit the inclined baffle and roll in the opposite direction to that section of the cell.
[0011] Preferably, the drive assembly includes a drive motor, a transmission gear, and a drive gear ring. The drive motor is located outside the flue gas emission chamber. A gear chamber is provided on one side of the flue gas hood. The transmission gear is rotatably disposed inside the gear chamber, and one side of the transmission gear extends outside the gear chamber. The output end of the drive motor is coaxially connected to the transmission gear. The outer ring of the drive gear ring has teeth that mesh with the transmission gear. A drive gear is provided at one end of the central shaft of the auger. The drive gear meshes with the inner teeth of the drive gear ring. A connecting frame is provided on the front side of the drive gear ring, and the middle part of the connecting frame is rotatably connected to the mounting plate.
[0012] Preferably, the drive switching mechanism includes a switching push rod and a locking spring block. The switching push rod is located on one side of the gear chamber, and its output end is rotatably connected to the shaft of the transmission gear. The locking spring block is located outside the heat exchange chamber and on the side of the mounting plate. The mounting plate is provided with a locking hole, which is corresponding to the locking spring block. A flip gear is provided on the outer end face of the mounting plate, and a switching gear is provided on the other end of the transmission gear, which is corresponding to the flip gear.
[0013] Preferably, a water outlet valve is provided at the top of one end of the heat exchange chamber, and a water inlet valve is provided at the bottom of the other end of the heat exchange chamber.
[0014] A method for utilizing waste heat from a boiler, which utilizes the aforementioned waste heat utilization device for an industrial boiler.
[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a waste heat utilization device and method for industrial boilers, which has the following beneficial effects: 1. The waste heat utilization device and method for this industrial boiler absorbs and stores the heat from the high-temperature flue gas through heat-conducting ball bearings in the flue gas pipeline. The heat is then used to heat water in the heat exchange chamber via the flue gas pipeline, thus absorbing the heat from the combustion-generated flue gas. As the flue gas passes through the flue gas pipeline, a drive assembly at one end of the pipeline drives a turning assembly to rotate within the pipeline. When the turning auger in the turning assembly rotates, it pushes the heat-conducting ball bearings in each cell to move along the flue gas flow direction within each cell. When the ball moves to the slot at the front of the cell, it moves through the slot to the rear of the cell, causing the ball to tumble and come into full contact with the flue gas in the flue gas pipe. The hot flue gas then heats the ball. As the ball tumbles inside the flue gas pipe, it transfers heat to the water between the flue gas pipe and the heat exchange chamber. At the same time, the ball's movement in the flue gas pipe knocks off soot and other impurities from the inner wall of the flue gas pipe, preventing them from adhering to the pipe and causing corrosion.
[0016] 2. The waste heat utilization device and method of this industrial boiler utilizes a ball bearing guide groove at the bottom of the flue gas pipeline. When the heat-conducting balls need to be replaced and cleaned of soot and other impurities after prolonged use, the drive assembly reverses the rotation of the auger, causing the heat-conducting balls in the flue gas pipeline to move towards the end of the cell. A ratchet on one side of the auger, during normal flue gas discharge, causes the auger to rotate within the flue gas pipeline. The ratchet contacts the sealing plate, compressing the return spring on the bent side of the ratchet, allowing the ratchet to retract. This prevents the auger from moving the sealing plate when passing it, thus preventing flue gas from being discharged from the ball bearing guide groove at the bottom of the flue gas pipeline into the heat exchange chamber, thus avoiding heat loss during discharge. Water contamination inside the hot chamber and the installation groove on the inner wall of the flue gas pipeline allow for the sliding installation of the sealing plate. During flue gas exhaust, the auger rotates within the flue gas pipeline, and the ratchet on the auger contacts the contact point on the sealing plate. The ratchet compresses the return spring on the bent side, preventing the sealing plate from moving during flue gas exhaust. When replacing the heat-conducting balls, the auger reverses, and the ratchet contacts the contact point. Due to the action of the limit block on one side of the ratchet, the ratchet directly pushes the contact point, thereby moving the sealing plate within the installation groove. This causes the sealing plate on the ball outlet groove to move along the arc-shaped guide rod, exposing the ball outlet groove. The heat-conducting balls can then roll from the ball outlet groove into the outlet pipe, discharging the heat-conducting balls and impurities such as soot after prolonged use.
[0017] 3. The waste heat utilization device and method of this industrial boiler, through the switching push rod in the driving switching mechanism, when it is necessary to put new heat-conducting balls into the flue gas pipeline, drives the switching mechanism to move the transmission gear. The transmission gear moves towards the locking spring block and pushes the locking spring block into the heat exchange chamber, thereby separating the locking spring block from the locking hole on the mounting plate. At the same time, the switching gear on the back of the transmission gear connects with the flipping gear on the mounting plate, and drives the flipping gear to rotate the mounting plate. The transmission gear drives the drive gear ring to rotate. During this process, the ball bearing outlet groove and outlet pipe at the bottom of the flue gas pipeline slowly flip upwards from the bottom of the flue gas pipeline (the ball bearing outlet groove and outlet pipe do not flip to the upper side of the flue gas pipeline to avoid the old heat-conducting balls from re-entering the flue gas pipeline from the ball bearing outlet groove). At the same time, the heat-conducting balls are placed into the flue gas pipeline from one end. The transmission gear drives the drive gear ring to reverse in the flue gas pipeline, pushing the heat-conducting balls into the flue gas pipeline. Since the ball bearing outlet groove flips upwards at this time, the new heat-conducting balls will not be discharged from the ball bearing outlet groove. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is one of the schematic diagrams showing the internal cross-sectional structure of the heat exchange cavity of the present invention; Figure 3 This is a second schematic diagram of the internal cross-sectional structure of the heat exchange cavity of the present invention; Figure 4 This is one of the schematic cross-sectional views of the interior of the heat exchange chamber and the flue gas emission chamber of the present invention; Figure 5 This is a second schematic cross-sectional view of the interior of the heat exchange chamber and the flue gas emission chamber of the present invention. Figure 6 This is one of the structural schematic diagrams of the drive component and drive switching mechanism of the present invention; Figure 7 This is a second schematic diagram of the drive component and drive switching mechanism of the present invention; Figure 8 This is a cross-sectional view of the drive assembly and transmission gear of the present invention. Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point A; Figure 10 This is a schematic diagram of the internal structure of the flue gas pipeline and the tilting assembly of the present invention; Figure 11 This is a schematic diagram of the exploded structure of the interior of the flue gas pipeline and the overturning component of the present invention; Figure 12 For the present invention Figure 11 A magnified schematic diagram of the structure at point B.
[0019] In the diagram: 1. Boiler body; 2. Heat exchange chamber; 21. Outlet valve; 22. Inlet valve; 3. Combustion chamber; 31. Mounting plate; 32. Lock hole; 33. Tilting gear; 4. Flue gas emission chamber; 41. Flue gas hood; 411. Gear chamber; 5. Flue gas pipeline; 51. Ball bearing guide groove; 52. Outlet pipe; 53. Sealing plate; 531. Contact point; 54. Arc-shaped guide rod; 55. Mounting groove; 7. Tilting assembly; 71. Tilting auger; 711. Ratchet; 712. Return spring; 713. Limit stop; 714. Drive gear; 72. Cell; 73. Slot; 75. Inclined baffle; 8. Drive assembly; 81. Drive motor; 82. Transmission gear; 821. Switching gear; 83. Drive gear ring; 84. Connecting frame; 9. Drive switching mechanism; 91. Switching push rod; 92. Locking spring. Detailed Implementation
[0020] 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.
[0021] Please see Figures 1-11 A waste heat utilization device for an industrial boiler includes a boiler body 1. A heat exchange chamber 2 is located in the middle section of the boiler body 1. A combustion chamber 3 is located at one end of the heat exchange chamber 2, and a flue gas exhaust chamber 4 is located at the other end of the heat exchange chamber 2. A flue gas pipeline 5 is provided between the combustion chamber 3 and the flue gas exhaust chamber 4. Heat-conducting ball bearings are installed inside the flue gas pipeline 5. An agitation assembly 7 is also installed inside the flue gas pipeline 5. The heat-conducting ball bearings are located between the flue gas pipeline 5 and the agitation assembly 7. A drive assembly is located at one end of the flue gas pipeline 5. 8. The driving component 8 is connected to the flipping component 7. A driving switching mechanism 9 is provided between the driving component 8 and the flue gas pipeline 5. The driving switching mechanism 9 connects the flue gas pipeline 5 and the driving component 8. The flipping component 7 includes a flipping auger 71 and cell 72. The flipping auger 71 is located inside the flue gas pipeline 5. The cell 72 is distributed on the flipping auger 71. The flipping auger 71 is provided with a plurality of slots 73. The cell 72 is arranged at intervals between each slot 73.
[0022] In operation, the high-heat flue gas generated in the combustion chamber 3 is discharged into the flue gas duct 5. The heat from the passing high-heat flue gas is absorbed and stored by the heat-conducting balls in the flue gas duct 5. The water in the heat exchange chamber 2 is then heated through the flue gas duct 5, thus absorbing the heat from the combustion-generated flue gas. As the flue gas passes through the flue gas duct 5, the drive assembly 8 at one end of the flue gas duct 5 drives the agitator 7 to rotate within the flue gas duct 5. When the agitator auger 71 in the agitator 7 rotates, it pushes the heat-conducting balls in each cell 72 to move along the flue gas flow direction in each cell 72. When the ball moves to the slot 73 at the front end of cell 72, it moves through the slot 73 to the rear end of cell 72, causing the ball to tumble and come into full contact with the flue gas in flue gas pipe 5. The hot flue gas then heats the ball. As the ball tumbles inside flue gas pipe 5, it transfers heat to the water between flue gas pipe 5 and heat exchange chamber 2. At the same time, as the ball tumbles in flue gas pipe 5, it knocks off soot and other impurities from the inner wall of flue gas pipe 5, preventing soot and other impurities from adhering to flue gas pipe 5 and causing corrosion.
[0023] Furthermore, mounting plates 31 are respectively provided between the heat exchange chamber 2 and the combustion chamber 3 and the flue gas emission chamber 4. The two ends of the flue gas pipeline 5 are respectively mounted on the mounting plates 31, and the flue gas pipeline 5 is connected to the combustion chamber 3 and the flue gas emission chamber 4 respectively. A flue gas hood 41 is provided at the end of the flue gas emission chamber 4, and the drive assembly 8 is located inside the flue gas hood 41. The flue gas pipeline 5 is installed by the mounting plates 31 provided at both ends of the heat exchange chamber 2, so that the flue gas pipeline 5 transports the high-heat flue gas generated by the combustion chamber 3 to the flue gas emission chamber 4. After the flue gas enters the flue gas emission chamber 4, it is centrally discharged through the flue gas hood 41. During the flue gas discharge process, the drive assembly 8 drives the turning assembly 7 to turn the heat-conducting balls in the flue gas pipeline 5, so that when storing and conducting heat, the flue gas leakage is avoided.
[0024] Furthermore, a ball bearing outlet groove 51 is provided at the bottom of the flue gas duct 5, which is correspondingly provided with the cell 72. The bottom of the ball bearing outlet groove 51 is connected to an outlet pipe 52, and a sealing plate 53 is provided on the ball bearing outlet groove 51. The sealing plate 53 is coaxially rotatable with the flue gas duct 5. When the heat-conducting balls in the flue gas duct 5 need to be replaced and cleaned of soot and other impurities after long-term use, the drive component 8 drives the auger 71 to reverse, so that the heat-conducting balls in the flue gas duct 5 move towards the tail end of the cell 72. The auger 71 drives the sealing plate 53 to move, exposing the ball bearing outlet groove 51, so that the heat-conducting balls can roll from the ball bearing outlet groove 51 into the outlet pipe 52, and discharge the heat-conducting balls and soot and other impurities after long-term use.
[0025] Furthermore, a ratchet 711 is provided on one side of the auger 71, which corresponds to the sealing plate 53. The bending direction of the ratchet 711 is the same as the rotation direction of the auger 71 when the flue gas is emitted. A return spring 712 is provided on the bent side of the ratchet 711, which connects the ratchet 711 to the auger 71. A limit stop 713 is provided on the other side of the ratchet 711, and the limit stop 713 is fixed to the auger 71. By flipping... The ratchet 711 on one side of the auger 71 rotates the auger 71 inside the flue gas pipeline 5 during normal flue gas discharge. The ratchet 711 on one side of the auger 71 contacts the sealing plate 53, compressing the return spring 712 on the bent side of the ratchet 711 to store energy. The ratchet 711 can retract, so that the auger 71 will not move the sealing plate 53 when it passes the sealing plate 53. This prevents the flue gas from being discharged into the heat exchange chamber 2 from the ball bearing outlet groove 51 at the bottom of the flue gas pipeline 5, thus avoiding water pollution inside the heat exchange chamber 2.
[0026] Furthermore, the inner wall of the flue gas duct 5 is provided with an installation groove 55, and an arc-shaped guide rod 54 is provided in the installation groove 55. The sealing plate 53 is slidably disposed in the installation groove 55, and the sealing plate 53 is slidably connected to the arc-shaped guide rod 54. The sealing plate 53 is provided with a contact point 531, and the contact point 531 corresponds to the ratchet 711. The sealing plate 53 is slidably installed through the installation groove 55 provided in the inner wall of the flue gas duct 5. During flue gas exhaust, the auger 71 rotates in the flue gas duct 5, and the ratchet 711 on the auger 71 interacts with the contact point 531 on the sealing plate 53. When the ratchet 711 is in contact with the contact point 531, the ratchet 711 is compressed to the bent side to return the spring 712, so that the auger 71 will not move the sealing plate 53 when the flue gas is discharged. When the heat-conducting ball is replaced, the auger 711 is reversed and the ratchet 711 contacts the contact point 531. Due to the action of the limit block 713 on one side of the ratchet 711, the ratchet 711 directly pushes the contact point 531, thereby driving the sealing plate 53 to move in the mounting groove 55. This causes the sealing plate 53 on the ball discharge groove 51 to move along the arc-shaped guide rod 54 and expose the ball discharge groove 51, so that the heat-conducting ball can be discharged from the ball discharge groove 51.
[0027] Furthermore, the auger 71 is provided with an inclined baffle 75, which is located at the tail end of the slot 73. The inclined direction of the inclined baffle 75 is opposite to the conveying direction of the auger 71 when the flue gas is discharged. When the flue gas is discharged, the heat-conducting balls in a section of the cell 72 roll in the flue gas pipeline 5. The rotating auger 71 pushes the heat-conducting balls to roll. When the heat-conducting balls move to the slot 73, they hit the inclined baffle 75 and roll in the opposite direction to that section of the cell 72. When the heat-conducting balls come out of the slot 73, the inclined baffle 75 pushes the heat-conducting balls towards the tail of the cell 72, so that the heat-conducting balls can continuously circulate and turn in the cell 72. The range of one cell 72 is equivalent to one pitch of the auger 71.
[0028] Furthermore, the drive assembly 8 includes a drive motor 81, a transmission gear 82, and a drive gear ring 83. The drive motor 81 is located outside the flue gas emission chamber 4. A gear chamber 411 is provided on one side of the flue gas hood 41. The transmission gear 82 is rotatably disposed inside the gear chamber 411, and one side of the transmission gear 82 extends outside the gear chamber 411. The output end of the drive motor 81 is coaxially connected to the transmission gear 82. The outer ring of the drive gear ring 83 is provided with teeth that mesh with the transmission gear 82. A drive gear 83 is provided at one end of the central shaft of the auger 71. 14. The drive gear 714 is respectively engaged with the teeth of the drive gear ring 83. The drive gear ring 83 is provided with a connecting frame 84 on the front side. The middle part of the connecting frame 84 is rotatably connected to the mounting plate 31. The drive motor 81 in the drive assembly 8 drives the transmission gear 82 to rotate in the gear chamber 411. The transmission gear 82 drives the drive gear ring 83, which is engaged with it, to rotate at one end of the auger 71. Then, the drive gear 714 drives the auger 71 to rotate in the flue gas pipeline 5. When the drive gear ring 83 rotates, it is mounted on the mounting plate 31 through the connecting frame 84 for stable rotation.
[0029] Further, the drive switching mechanism 9 includes a switching push rod 91 and a locking spring block 92. The switching push rod 91 is located on one side of the gear chamber 411, and its output end is rotatably connected to the shaft of the transmission gear 82. The locking spring block 92 is located outside the heat exchange chamber 2 and on the side of the mounting plate 31. The mounting plate 31 is provided with a locking hole 32, which corresponds to the locking spring block 92. A flip gear 33 is provided on the outer end face of the mounting plate 31, and a switching gear 821 is provided on the other end of the transmission gear 82, which corresponds to the flip gear 33. When a new heat-conducting ball needs to be placed into the flue gas pipeline 5, the drive switching mechanism 9 drives the transmission gear 82 to move via the switching push rod 91 in the drive switching mechanism 9. The transmission gear 82 moves towards the locking spring block 92 and pushes the locking spring block 92 towards the heat exchange chamber 2. The internal movement causes the locking spring block 92 to separate from the locking hole 32 on the mounting plate 31. At the same time, the switching gear 821 on the back of the transmission gear 82 connects with the flip gear 33 on the mounting plate 31 and drives the flip gear 33 to rotate the mounting plate 31. The transmission gear 82 drives the drive gear ring 83 to rotate. During this process, the ball outlet groove 51 and outlet pipe 52 at the bottom of the flue gas pipe 5 slowly flip upward from the bottom of the flue gas pipe 5 (the ball outlet groove 51 and outlet pipe 52 do not flip to the upper side of the flue gas pipe 5 to avoid the old heat-conducting balls from re-entering the flue gas pipe 5 from the ball outlet groove 51). At the same time, heat-conducting balls are placed into the flue gas pipe 5 from one end of the flue gas pipe 5. The transmission gear 82 drives the drive gear ring 83 to reverse in the flue gas pipe 5, pushing the heat-conducting balls into the flue gas pipe 5. Since the ball outlet groove 51 flips upward at this time, the new heat-conducting balls will not be discharged from the ball outlet groove 51.
[0030] Furthermore, a water outlet valve 21 is provided at the top of one end of the heat exchange chamber 2, and a water inlet valve 22 is provided at the bottom of the other end of the heat exchange chamber 2.
[0031] A method for utilizing waste heat from a boiler, which utilizes the aforementioned waste heat utilization device for an industrial boiler.
[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waste heat utilization device for an industrial boiler, comprising a boiler body, characterized in that: A heat exchange chamber is provided in the middle section of the boiler body. A combustion chamber is provided at one end of the heat exchange chamber, and a flue gas discharge chamber is provided at the other end of the heat exchange chamber. A flue gas pipeline is provided between the combustion chamber and the flue gas discharge chamber. A heat-conducting ball is provided inside the flue gas pipeline. An agitation assembly is provided inside the flue gas pipeline. The heat-conducting ball is located between the flue gas pipeline and the agitation assembly. A drive assembly is provided at one end of the flue gas pipeline. The drive assembly is connected to the agitation assembly. A drive switching mechanism is provided between the drive assembly and the flue gas pipeline. The drive switching mechanism connects the flue gas pipeline and the drive assembly. The flipping assembly includes a flipping auger and cell units. The flipping auger is located inside the flue gas pipeline, and the cell units are distributed on the flipping auger. The flipping auger is provided with a plurality of slots, and the cell units are arranged at intervals between each slot.
2. The waste heat utilization device for an industrial boiler according to claim 1, characterized in that: Mounting plates are respectively provided between the heat exchange chamber and the combustion chamber and the flue gas emission chamber. Both ends of the flue gas pipeline are respectively mounted on the mounting plates, and the flue gas pipeline is respectively connected to the combustion chamber and the flue gas emission chamber. A flue gas hood is provided at the end of the flue gas emission chamber, and the drive assembly is located inside the flue gas hood.
3. The waste heat utilization device for an industrial boiler according to claim 1, characterized in that: The bottom of the flue gas pipeline is provided with a ball bearing outlet groove, which is corresponding to the cell. The bottom of the ball bearing outlet groove is connected to an outlet pipe, and a sealing plate is provided on the ball bearing outlet groove. The sealing plate is coaxially rotatable with the flue gas pipeline.
4. The waste heat utilization device for an industrial boiler according to claim 3, characterized in that: A ratchet is provided on one side of the auger, and the ratchet is correspondingly provided with the sealing plate. The bending direction of the ratchet is the same as the rotation direction of the auger when the flue gas is emitted. A return spring is provided on the bent side of the ratchet, and the return spring connects the ratchet and the auger. A limit block is provided on the other side of the ratchet, and the limit block is fixed on the auger.
5. The waste heat utilization device for an industrial boiler according to claim 4, characterized in that: The inner wall of the flue gas pipeline is provided with an installation groove, and an arc-shaped guide rod is provided in the installation groove. The sealing plate is slidably disposed in the installation groove and is slidably connected to the arc-shaped guide rod. The sealing plate is provided with contact points, and the contact points correspond to the ratchet teeth.
6. The waste heat utilization device for an industrial boiler according to claim 1, characterized in that: An inclined baffle is provided on the auger, which is located at the end of the slot. The inclined baffle is tilted in the opposite direction to the conveying direction of the auger when the flue gas is discharged. When the flue gas is discharged, the heat-conducting balls in a section of the cell roll in the flue gas pipeline. The rotating auger pushes the heat-conducting balls to roll. When the heat-conducting balls move to the slot, they hit the inclined baffle and roll in the opposite direction to that section of the cell.
7. The waste heat utilization device for an industrial boiler according to claim 2, characterized in that: The drive assembly includes a drive motor, a transmission gear, and a drive gear ring. The drive motor is located outside the flue gas emission chamber. A gear chamber is provided on one side of the flue gas hood. The transmission gear is rotatably disposed inside the gear chamber, and one side of the transmission gear extends outside the gear chamber. The output end of the drive motor is coaxially connected to the transmission gear. The outer ring of the drive gear ring has teeth that mesh with the transmission gear. A drive gear is provided at one end of the central shaft of the auger. The drive gear meshes with the inner teeth of the drive gear ring. A connecting frame is provided on the front side of the drive gear ring, and the middle part of the connecting frame is rotatably connected to the mounting plate.
8. The waste heat utilization device for an industrial boiler according to claim 7, characterized in that: The drive switching mechanism includes a switching push rod and a locking spring block. The switching push rod is located on one side of the gear chamber, and its output end is rotatably connected to the shaft of the transmission gear. The locking spring block is located outside the heat exchange chamber and on the side of the mounting plate. The mounting plate is provided with a locking hole, which is corresponding to the locking spring block. A flip gear is provided on the outer end face of the mounting plate, and a switching gear is provided on the other end of the transmission gear, which is corresponding to the flip gear.
9. The waste heat utilization device for an industrial boiler according to claim 1, characterized in that: A water outlet valve is provided at the top of one end of the heat exchange chamber, and a water inlet valve is provided at the bottom of the other end of the heat exchange chamber.
10. A method for utilizing boiler waste heat, characterized in that, The waste heat utilization device of an industrial boiler according to any one of claims 1-9 is applied.