A waste heat diversion device during the combustion of a boiler in a thermal power plant

Abstract

The present invention relates to the technical field of waste heat recovery, and discloses a waste heat diversion device during the combustion of a boiler in a thermal power plant, which includes a heat exchange box and a conveying pipeline installed through the heat exchange box. The heat exchange box is filled with a heat exchange medium. On the outer walls of the conveying pipelines on both sides of the heat exchange box, a smoke inlet and a smoke outlet are respectively provided. The side of the conveying pipeline close to the smoke inlet is the initial end, and the end of the conveying pipeline close to the smoke outlet is the terminal end. In the present invention, a cleaning ball is intermittently launched into the conveying pipeline by a launching assembly, and with the thrust of the flue gas on the cleaning ball in the conveying pipeline, the cleaning ball moves at a high speed on the inner wall of the conveying pipeline, and impacts and scrapes the inner wall of the conveying pipeline, so that the soot attached to the inner wall of the conveying pipeline falls off, and is discharged into the reset pipe along with the flue gas and discharged outside the device, thereby avoiding the attachment of soot particles on the inner wall of the pipeline, preventing the corrosion and breakage of the pipeline caused by the soot particles, and increasing the service life of the device.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a waste heat diversion device during combustion of a thermal power plant boiler. Background Art

[0002] When the boiler of a thermal power plant is burning, the heat energy lost in the exhaust gas accounts for 5% to 12% of the total heat energy generated by coal, and 80% or even higher of the total heat loss of the boiler. Therefore, the waste heat loss of the flue gas at the tail end of the boiler is the focus of waste heat utilization in thermal power plants. At present, the recovery of this part of waste heat is mostly achieved by installing a flue gas cooler in the exhaust system, transferring the waste heat to the boiler water supply system or air intake system through heat transfer media such as air or water, heating the combustion air and condensed water to achieve the purpose of energy saving.

[0003] For example, Chinese patent publication number CN118066909A discloses a high-temperature flue gas waste heat utilization device, including a flue through which high-temperature flue gas is introduced, wherein: a heat exchange shell is disposed outside the flue, and a heat exchanger is disposed inside the flue; a heat exchange cavity is formed between the inner surface of the heat exchange shell and the outer surface of the flue, and a heat exchange medium is filled in the heat exchange cavity and the heat exchanger. In this invention, a heat exchange shell is disposed outside the flue through which high-temperature flue gas flows, and a heat exchanger is disposed inside the flue, and a heat exchange medium is used to absorb the heat energy dissipated from the flue and the heat energy of the high-temperature flue gas itself, thereby improving the recovery rate of the heat energy of the high-temperature flue gas and reducing the waste of the heat energy of the high-temperature flue gas.

[0004] However, when this type of waste heat recovery and reuse device recovers heat from flue gas, the smoke passage duct is usually set to be curved to increase the contact area with the heat exchange medium. However, when the smoke is transported in the curved smoke passage duct, it is easier to adhere to the inner wall of the duct, which reduces the heat exchange efficiency of the duct and may also corrode the duct, reducing the service life of the device. Summary of the invention

[0005] The object of the present invention is to provide a waste heat diversion device for combustion of a thermal power plant boiler, so as to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a waste heat diversion device for a thermal power plant boiler during combustion, comprising a heat exchange box and a delivery pipeline installed in the heat exchange box, wherein the heat exchange box is filled with a heat exchange medium, and the outer walls of the delivery pipelines located on both sides of the heat exchange box are respectively provided with a smoke inlet and a smoke outlet, wherein the side of the delivery pipeline close to the smoke inlet is the initial end, and the end of the delivery pipeline close to the smoke outlet is the terminal end;

[0007] It also includes a cleaning ball that can roll quickly in the conveying pipeline;

[0008] Also included is a launching assembly for launching the cleaning balls into the delivery pipe;

[0009] The reset assembly is used to return the cleaning ball from the end of the conveying pipe to the starting end.

[0010] Preferably, the launching assembly comprises a launching chamber fixedly connected to the outer wall of the initial end of the conveying pipeline, a fixed block is fixedly installed on the inner wall of the launching chamber, a collision body is slidably connected to the inner wall of the launching chamber, a sliding groove for sliding the fixed block is provided on the outer wall of the collision body, and a second spring is installed between the fixed block and the inner wall of the collision body sliding groove, the bottom of the launching chamber is set to be open, and a limiting rod is rotatably installed at the opening of the launching chamber, and a torsion spring is connected between the limiting rod and the opening of the launching chamber, the bottom of the collision body is fixedly connected to a moving rod and a limiting protrusion arranged in a staggered manner, the limiting rod is provided with a wedge block at one end close to the limiting protrusion, and the wedge block and the limiting protrusion are located in the same plane, and the edge of the limiting protrusion is provided with an inclined surface;

[0011] The launching assembly also includes a rotating shaft rotatably installed at the bottom of the launching chamber through an axle seat, and the rotating shaft is driven to rotate by an external rotating device. A first toggle rod and a second toggle rod are fixedly installed on the outer wall of the rotating shaft, and the first toggle rod and the limiting rod are located in the same plane, and the second toggle rod and the moving rod are located in the same plane.

[0012] Preferably, the reset component comprises a connecting pipe fixedly connected to the end of the conveying pipe, a rotating column is rotatably installed at the center of the connecting pipe, and the rotating column is annularly provided with a plurality of openings for the cleaning balls to enter, a reset pipe is fixedly connected to the bottom of the connecting pipe, a bead storage tube is fixedly connected to one end of the reset pipe away from the connecting pipe, the top of the bead storage tube is fixedly connected and communicated with the initial end of the conveying pipe, and a reset block is slidably installed in the bead storage tube;

[0013] It also includes a lifting assembly which can make the reset block move up and down reciprocatingly.

[0014] Preferably, the lifting assembly comprises notches on both sides of the bead storage tube, the outer walls on both sides of the reset block are fixedly connected with sliders that can slide in the notches, the sliders are connected to the top of the notches with a first spring, the outer walls on both sides of the bead storage tube are rotatably mounted with fixed pulleys, the outer walls on both sides of the rotating shaft are fixedly mounted with limit rings, and both side ends of the rotating shaft are provided with inclined surfaces;

[0015] It also includes a nylon rope rotatably connected to the outer wall of the rotating shaft, the nylon rope passes around the fixed pulley and is fixedly connected to the top of the slider;

[0016] It also includes an elastic ring which is fixedly installed on the inner wall of the bead storage tube.

[0017] Preferably, the surface of the cleaning ball is provided with a plurality of unevenly distributed textures.

[0018] Preferably, a plurality of filter ports are provided on the outer wall of the reset pipeline.

[0019] Preferably, a first groove is provided at the top of the reset block.

[0020] Preferably, the conveying pipeline inside the heat exchange box is bent.

[0021] Preferably, a second groove is provided at the bottom of the inner wall of the conveying pipeline in the heat exchange box.

[0022] Preferably, a fixing ring is fixedly installed on the outer wall of the connecting pipeline, the rotating column is coaxially and fixedly connected with an elastic block, the elastic block is located inside the fixing ring, a plurality of elastic parts corresponding to the openings on the rotating column are provided on the outer wall of the elastic block, and a groove for the elastic parts to be embedded is provided on the inner ring of the fixing ring.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] In the present invention, the cleaning balls are intermittently launched into the conveying pipeline by the launching assembly, and with the thrust of the flue gas on the cleaning balls in the conveying pipeline, the cleaning balls move at a high speed on the inner wall of the conveying pipeline and impact and scrape the inner wall of the conveying pipeline, so that the soot adhering to the inner wall of the conveying pipeline falls off and is discharged into the reset pipe and out of the device along with the flue gas, thereby avoiding the attachment of soot particles on the inner wall of the pipeline, improving the heat exchange efficiency of the pipeline, preventing the corrosion and damage of the pipeline by the soot particles, and increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of the present invention;

[0026] Figure 2 is a front view of the present invention;

[0027] Figure 3 is a partial front sectional view of the present invention;

[0028] Figure 4 is the present invention Figure 3 an enlarged view of part A in;

[0029] Figure 5 is a schematic diagram of the movement trajectory of the cleaning balls of the present invention;

[0030] Figure 6 is a schematic diagram of the conveying pipeline inside the heat exchange box of the present invention;

[0031] Figure 7 is a schematic diagram of the flue gas diversion in the conveying pipeline of the present invention;

[0032] Figure 8 is a sectional view schematic diagram of the second groove in the present invention.

[0033] In the figure: 1. heat exchange box; 2. conveying pipeline; 3. smoke inlet; 4. smoke outlet; 5. connecting pipeline; 6. launching chamber; 7. rotating column; 8. reset pipeline; 9. bead storage tube; 10. inclined plane; 11. reset block; 12. notch; 13. first spring; 14. fixed pulley; 15. nylon rope; 16. elastic ring; 17. collision body; 18. fixed block; 19. moving rod; 20. limiting protrusion; 21. limiting rod; 22. rotating shaft; 23. first toggle rod; 24. second toggle rod; 25. filter port; 26. first groove; 27. cleaning ball; 28. second groove; 29. ​​limiting ring; 30. second spring; 31. fixed ring; 32. elastic block; 33. slider; 34. wedge block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 8 The present invention provides a technical solution: a waste heat diversion device for a thermal power plant boiler during combustion, comprising a heat exchange box 1 and a delivery pipe 2 installed in the heat exchange box 1, the heat exchange box 1 is filled with a heat exchange medium, characterized in that: the outer walls of the delivery pipe 2 located on both sides of the heat exchange box 1 are respectively provided with a smoke inlet 3 and a smoke outlet 4, the side of the delivery pipe 2 close to the smoke inlet 3 is the initial end, and the end of the delivery pipe 2 close to the smoke outlet 4 is the terminal end;

[0036] It also includes a cleaning ball 27 that can roll quickly in the delivery pipe 2;

[0037] Also included is a launching assembly for launching the cleaning ball 27 into the delivery pipe 2;

[0038] The reset assembly is used to return the cleaning ball 27 from the end of the conveying pipe 2 to the initial end.

[0039] See also Figure 1 When the device is in use, the smoke enters the delivery pipe 2 from the smoke inlet 3 and is discharged from the smoke outlet 4. When the smoke moves in the delivery pipe 2 in the heat exchange box 1, it transfers its own heat to the heat exchange medium in the heat exchange box 1, thereby achieving the purpose of waste heat recovery and reuse, and the heat exchange medium is connected to the external heat storage device and circulates.

[0040] However, in this process, the flue gas will adhere to the inner wall of the pipeline when it is transported in the pipeline 2, which will reduce the heat exchange efficiency of the pipeline and may corrode the pipeline, reducing the service life of the device. Manual cleaning is difficult and accompanied by certain risks. Therefore, during the process of flue gas transportation, the launch component will intermittently launch the cleaning ball 27 into the pipeline 2, see Figure 7 The launching component cooperates with the thrust of the flue gas on the cleaning ball 27 in the conveying pipe 2, so that the cleaning ball 27 moves at high speed on the inner wall of the conveying pipe 2, and impacts and scratches the inner wall of the conveying pipe 2, so that the smoke and dust attached to the inner wall of the conveying pipe 2 falls off and is discharged with the flue gas. When the cleaning ball 27 moves to the end of the conveying pipe 2, the resetting component will send the cleaning ball 27 back to the initial end and wait for the launching component to launch it into the conveying pipe 2 again.

[0041] In this way, the smoke residue particles attached to the inner wall of the conveying pipe 2 can fall off and be discharged outside the conveying pipe 2 as the smoke moves in the conveying pipe 2, thereby avoiding the smoke residue particles from adhering to the inner wall of the pipe, improving the heat exchange efficiency of the pipe, preventing the smoke residue particles from corroding the pipe and causing damage, and increasing the service life of the device.

[0042] Further, the launching assembly includes a launching chamber 6 fixedly connected to the outer wall of the initial end of the conveying pipe 2, a fixed block 18 is fixedly installed on the inner wall of the launching chamber 6, a collision body 17 is slidably connected to the inner wall of the launching chamber 6, a sliding groove for sliding the fixed block 18 is provided on the outer wall of the collision body 17, and a second spring 30 is installed between the fixed block 18 and the inner wall of the sliding groove of the collision body 17, the bottom of the launching chamber 6 is set to be open, and a limiting rod 21 is rotatably installed at the opening of the launching chamber 6, and a torsion spring is connected between the limiting rod 21 and the opening of the launching chamber 6, the bottom of the collision body 17 is fixedly connected with a moving rod 19 and a limiting protrusion 20 arranged in an offset manner, and a wedge block 34 is provided at one end of the limiting rod 21 close to the limiting protrusion 20, and the wedge block 34 and the limiting protrusion 20 are located in the same plane, and the edge of the limiting protrusion 20 is provided with an inclined surface;

[0043] The launching assembly also includes a rotating shaft 22 rotatably mounted at the bottom of the launching chamber 6 through an axle seat, and the rotating shaft 22 is driven to rotate by an external rotating device. A first toggle rod 23 and a second toggle rod 24 are fixedly mounted on the outer wall of the rotating shaft 22, and the first toggle rod 23 and the limiting rod 21 are located in the same plane, and the second toggle rod 24 and the moving rod 19 are located in the same plane.

[0044] See also Figure 4, the entire operation process of the launching component is divided into three stages: the triggering stage, the preparation stage, and the launching stage. During the triggering stage, the external rotating device drives the rotating shaft 22 to rotate, thereby driving the second toggle lever 24 to rotate. The second toggle lever 24 will gradually rotate until it fits with the moving rod 19. When the two are in contact, during the rotation of the second toggle lever 24, it will cause the moving rod 19 to move, so that the moving rod 19 drives the collision body 17 to slide on the inner wall of the launching cavity 6. During this process, the second spring 30 is gradually compressed to provide kinetic energy for the subsequent launching stage. During this process, the movement of the collision body 17 will also drive the limit protrusion 20 to slide. When the limit protrusion 20 slides until it contacts the wedge block 34, due to the cooperation of the inclined surfaces of the wedge block 34 and the limit protrusion 20, it will drive the wedge block 34 and the limit rod 21 to rotate together, causing the limit protrusion 20 to cross to the other side of the wedge block 34. Then, as the second toggle lever 24 continues to rotate, it will disengage from the moving rod 19. At this time, under the action of the second spring 30, the straight surface on the other side of the limit protrusion 20 contacts the straight surface of the wedge block 34, completing the limiting function. At this time, the work of the triggering stage is completed.

[0045] When the triggering stage ends and enters the preparation stage, this stage is after the second toggle lever 24 crosses the moving rod 19 and before the first toggle lever 23 contacts the limit rod 21. During this stage, the reset component will send the cleaning ball 27 from the end of the conveying pipeline 2 back to the initial end to prepare for the subsequent launching stage.

[0046] When the reset component sends the cleaning ball 27 back to the initial end of the conveying pipeline 2, it enters the launching stage. When the first toggle lever 23 rotates until it contacts the limit rod 21, it will drive the limit rod 21 to rotate, so that the limit rod 21 drives the wedge block 34 to rotate, causing the wedge block 34 to disengage from the limit protrusion 20. Under the action of the second spring 30, it will cause the collision body 17 to quickly reset. During the reset process, the outer wall of the collision body 17 will impact the cleaning ball 27, so that the cleaning ball 27 has great kinetic energy, completing the launching stage. Then, repeating the above steps can achieve the purpose of intermittently launching the cleaning ball 27.

[0047] In this way, the cleaning ball 27 can be launched from the initial end of the conveying pipeline 2, move at high speed on the inner wall of the conveying pipeline 2, and impact and scrape the inner wall of the conveying pipeline 2, causing the soot attached to the inner wall of the conveying pipeline 2 to fall off.

[0048] Furthermore, the reset component includes a connecting pipeline 5 fixedly connected to the end of the conveying pipeline 2. A rotating column 7 is rotatably installed at the center inside the connecting pipeline 5, and a plurality of openings for the cleaning ball 27 to enter are annularly provided on the rotating column 7. A reset pipeline 8 is fixedly connected to the bottom of the connecting pipeline 5. One end of the reset pipeline 8 far from the connecting pipeline 5 is fixedly connected to a bead storage pipe 9. The top of the bead storage pipe 9 is fixedly connected and communicated with the initial end of the conveying pipeline 2. A reset block 11 is slidably installed inside the bead storage pipe 9;

[0049] It further includes a lifting component that can move the reset block 11 up and down reciprocally.

[0050] Refer to Figure 3 , when the cleaning ball 27 moves from the initial end to the terminal end, under the action of inertia, it will hit the outer wall at the opening of the rotating column 7, thereby causing the rotating column 7 to rotate. Further, the cleaning ball 27 will enter the reset pipe 8. Under the action of gravity, the cleaning ball 27 will move through the reset pipe 8 to the top of the reset block 11 in the bead storage pipe 9. When entering the aforementioned preparation stage, the lifting component will drive the reset block 11 to move upward, so that the reset block 11 drives the cleaning ball 27 to move upward, sending the cleaning ball 27 back to the initial end. After the preparation stage ends, the lifting component will reset the reset block 11, enabling the next cleaning ball 27 to enter the bead storage pipe 9 and stop at the top of the reset block 11, thus sending the cleaning ball 27 back from the terminal end of the conveying pipe 2 to the initial end of the conveying pipe 2 again, completing the recycling of the cleaning ball 27.

[0051] It is worth mentioning that the soot particles cleaned by the cleaning ball 27 will be carried by the flowing flue gas to the terminal end of the conveying pipe 2. And as the cleaning ball 27 hits and rotates the rotating column 7 to make the gap where the reset pipe 8 communicates with the conveying pipe 2, the soot particles will be discharged into the reset pipe 8, completing the slag discharge process.

[0052] Further, the lifting component includes notches 12 opened on both sides of the bead storage pipe 9. Sliders 33 that can slide in the notches 12 are fixedly connected to the outer walls on both sides of the reset block 11. A first spring 13 is connected between the slider 33 and the inner top of the notch 12. Fixed pulleys 14 are rotatably installed on the outer walls on both sides of the bead storage pipe 9. Limiting rings 29 are fixedly installed on the outer walls on both sides of the rotating shaft 22, and inclined surfaces 10 are opened at both ends of the rotating shaft 22.

[0053] It further includes a nylon rope 15 rotatably connected to the outer wall of the rotating shaft 22. The nylon rope 15 bypasses the fixed pulley 14 and is fixedly connected to the top of the slider 33.

[0054] It further includes an elastic ring 16 fixedly installed on the inner wall of the bead storage pipe 9.

[0055] Refer to Figure 5 , when the triggering stage ends and enters the preparation stage, the rotation of the rotating shaft 22 will cause the nylon rope 15 to gradually wind around the outer wall of the rotating shaft 22. Through the cooperation of the fixed pulley 14 and the nylon rope 15, the slider 33 will drive the reset block 11 to move upward, so that the reset block 11 drives the cleaning ball 27 to move upward, further pushing the cleaning ball 27 into the upper end of the elastic ring 16 and sending the cleaning ball 27 closest to the initial end of the conveying pipe 2 back to the initial end again.

[0056] When entering the launching stage, the cleaning ball 27 is launched by the launching assembly. At the same time, due to the existence of the inclined surface 10 on the rotating shaft 22, the nylon rope 15 will be separated from the rotating shaft 22. Under the action of the first spring 13, the slider 33 will drive the reset block 11 to gradually reset, so that the next cleaning ball 27 enters the bead storage tube 9 and moves to the top of the reset block 11, completing the reset process of the cleaning ball 27 and achieving the purpose of recycling the cleaning ball 27.

[0057] It is worth mentioning that an elastic ring 16 can also be installed at the contact end of the bead storage tube 9 and the conveying pipe 2, so that the next cleaning ball 27 will contact and resist the bottom of the elastic ring 16, thereby achieving the effect of blocking the smoke, so that the smoke can only enter the conveying pipe 2, reducing the escape of smoke from the bead storage tube 9.

[0058] Furthermore, the surface of the cleaning ball 27 is provided with a plurality of unevenly distributed textures.

[0059] The unevenly distributed patterns on the surface of the cleaning ball 27 can increase the friction on the particles attached to the inner wall of the conveying pipe 2 to a certain extent without causing excessive kinetic energy loss. When the cleaning ball 27 impacts in the conveying pipe 2, it can better scrape off the particles on the inner wall of the conveying pipe 2, thereby greatly improving the cleaning effect.

[0060] While the inner wall of the conveying pipe 2 rolls, the particles in the smoke will adhere to the outer wall of the cleaning ball 27. When the cleaning ball 27 hits the outer wall at the opening of the rotating column 7, the particles attached to the outer wall will be shaken off and fall into the reset pipe 8 by following the conveying pipe 2.

[0061] Furthermore, a plurality of filter openings 25 are formed on the outer wall of the reset pipe 8 .

[0062] See also Figure 3 When the cleaning ball 27 passes through the reset pipe 8, it will rub against the filter port 25 on the inner wall of the reset pipe 8, so that the particles attached to the outer wall of the cleaning ball 27 can fall off, thereby achieving the effect of cleaning the cleaning ball 27.

[0063] It is worth mentioning that the smoke particles falling into the reset pipe 8 can also be discharged out of the reset pipe 8 from the filter port 25. A collecting device is placed under the reset pipe 8 for easy cleaning.

[0064] Furthermore, a first groove 26 is provided on the top of the reset block 11 .

[0065] See also Figure 3 When the cleaning ball 27 rolls to the top of the reset block 11, it will be embedded in the first groove 26, preventing the reset block 11 from hitting the inner wall of the bead storage tube 9. The reaction force generated will bounce the cleaning ball 27 back into the reset pipe 8.

[0066] Furthermore, the conveying pipeline 2 inside the heat exchange box 1 is bent.

[0067] See Figure 6 , the conveying pipeline 2 inside the heat exchange box 1 is bent, which can increase the contact area between the conveying pipeline 2 and the heat exchange medium in the heat exchange box 1, and can better transfer heat to the heat exchange medium.

[0068] Furthermore, a second groove 28 is formed at the bottom of the inner wall of the conveying pipeline 2 in the heat exchange box 1.

[0069] See Figure 7 And Figure 8 , the formation of the second groove 28 allows the soot particles scraped off by the cleaning ball 27 on the inner wall of the conveying pipeline 2 to fall into it. When the flue gas is conveyed forward, due to being blocked by the cleaning ball 27, the flue gas will be diverted from the cleaning ball 27 and pass through the second groove 28 above and below it. Due to the reduction of the cross-section and the diversion of the flue gas, the flow velocity of the flue gas at the gap between the cleaning ball 27 and the conveying pipeline 2 (i.e., the upper gap and the second groove 28) will increase. In this way, the flue gas can drive the soot particles falling into the second groove 28 to be blown to the end until they enter the reset pipeline 8 through the rotating column 7 and are discharged through the first groove 26 in the reset pipeline 8, avoiding accumulation in the conveying pipeline 2. While cleaning the inner wall of the conveying pipeline 2, it can also collect and clean the fallen soot particles, preventing the continuous accumulation of soot particles in the conveying pipeline 2, reducing the inner diameter of the conveying pipeline 2, and resulting in a decrease in heat exchange efficiency.

[0070] Moreover, it is worth noting that since the cleaning ball 27 will block the flue gas in the conveying pipeline 2, this can not only utilize the flue gas to provide assistance to the cleaning ball 27 so that it can be discharged from the end, but also increase the residence time of the flue gas in the conveying pipeline 2 by blocking the flue gas, thereby improving the heat exchange efficiency.

[0071] Furthermore, a fixing ring 31 is fixedly installed on the outer wall of the connecting pipeline 5, and an elastic block 32 is coaxially and fixedly connected to the rotating column 7. The elastic block 32 is located inside the fixing ring 31. A plurality of elastic parts corresponding to the openings on the rotating column 7 are provided on the outer wall of the elastic block 32, and a groove for the elastic parts to be embedded is provided on the inner ring of the fixing ring 31.

[0072] See Figure 1 , when the cleaning ball 27 impacts the rotating column 7, the elastic block 32 will rotate together with the rotating column 7, and the elastic parts on the elastic block 32 will deform. During rotation, due to the action of the fixing ring 31 on the elastic parts, the elastic parts will be embedded in the next groove, preventing the rotating column 7 from rotating after the cleaning ball 27 collides with the rotating column 7 and the next opening on the rotating column 7 not allowing the next cleaning ball 27 to pass through, resulting in the cleaning ball 27 being unable to be discharged from the conveying pipeline 2.

[0073] The standard parts used in this embodiment can be directly purchased from the market, and the non-standard structural components described in the specification and drawings can also be directly processed without doubt according to the existing common technical knowledge. At the same time, the connection methods of each component adopt the mature conventional means in the prior art, and the machines, parts and equipment all adopt the conventional models in the prior art. Therefore, no specific description will be made here.

[0074] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat diversion device during the combustion of a boiler in a thermal power plant, comprising a heat exchange box (1) and a conveying pipeline (2) installed through the heat exchange box (1), wherein a heat exchange medium is filled in the heat exchange box (1), and it is characterized in that: The outer walls of the delivery pipe (2) located on both sides of the heat exchange box (1) are respectively provided with a smoke inlet (3) and a smoke outlet (4); the side of the delivery pipe (2) close to the smoke inlet (3) is the initial end, and the end of the delivery pipe (2) close to the smoke outlet (4) is the terminal end; It also includes a cleaning ball (27) that can roll quickly in the conveying pipeline (2); It also includes a launching assembly for launching the cleaning ball (27) into the conveying pipe (2); A reset assembly, used to return the cleaning ball (27) from the end of the delivery pipe (2) to the initial end; The launching assembly comprises a launching chamber (6) fixedly connected to the outer wall of the initial end of the conveying pipe (2); a fixing block (18) is fixedly installed on the inner wall of the launching chamber (6); a collision body (17) is slidably connected to the inner wall of the launching chamber (6); a sliding groove for sliding the fixing block (18) is provided on the outer wall of the collision body (17); a second spring (30) is installed between the fixing block (18) and the inner wall of the sliding groove of the collision body (17); the bottom of the launching chamber (6) is set to be open, and the A limiting rod (21) is rotatably mounted at the opening of the firing chamber (6), and a torsion spring is connected between the limiting rod (21) and the opening of the firing chamber (6); a moving rod (19) and a limiting protrusion (20) which are arranged in an offset manner are fixedly connected to the bottom of the collision body (17); a wedge block (34) is provided at one end of the limiting rod (21) close to the limiting protrusion (20), and the wedge block (34) and the limiting protrusion (20) are located in the same plane, and an inclined surface is provided on the edge of the limiting protrusion (20); The launching assembly further comprises a rotating shaft (22) rotatably mounted at the bottom of the launching chamber (6) via a shaft seat, and the rotating shaft (22) is driven to rotate via an external rotating device, and a first toggle rod (23) and a second toggle rod (24) are fixedly mounted on the outer wall of the rotating shaft (22), and the first toggle rod (23) and the limiting rod (21) are located in the same plane, and the second toggle rod (24) and the moving rod (19) are located in the same plane.

2. The waste heat diversion device during the combustion of a thermal power plant boiler according to claim 1, wherein: The reset assembly comprises a connecting pipe (5) fixedly connected to the end of the conveying pipe (2), a rotating column (7) is rotatably installed in the center of the connecting pipe (5), and the rotating column (7) is provided with a plurality of openings in an annular shape for the cleaning balls (27) to enter, a reset pipe (8) is fixedly connected to the bottom of the connecting pipe (5), a bead storage tube (9) is fixedly connected to the end of the reset pipe (8) away from the connecting pipe (5), the top of the bead storage tube (9) is fixedly connected to and communicated with the initial end of the conveying pipe (2), and a reset block (11) is slidably installed in the bead storage tube (9); It also comprises a lifting assembly which can enable the reset block (11) to move up and down reciprocatingly.

3. The waste heat diversion device during the combustion of a thermal power plant boiler according to claim 2, characterized in that: The lifting assembly comprises slots (12) provided on both sides of the bead storage tube (9), the outer walls on both sides of the reset block (11) are fixedly connected with sliders (33) which can slide in the slots (12), the sliders (33) and the top of the slots (12) are connected with a first spring (13), the outer walls on both sides of the bead storage tube (9) are rotatably mounted with fixed pulleys (14), the outer walls on both sides of the rotating shaft (22) are fixedly mounted with limit rings (29), and the ends of both sides of the rotating shaft (22) are provided with inclined surfaces (10); It also includes a nylon rope (15) rotatably connected to the outer wall of the rotating shaft (22), wherein the nylon rope (15) passes around the fixed pulley (14) and is fixedly connected to the top of the sliding block (33); It also includes an elastic ring (16) fixedly mounted on the inner wall of the bead storage tube (9).

4. The waste heat diversion device during the combustion of a thermal power plant boiler according to any one of claims 1-3, characterized in that: The surface of the cleaning ball (27) is provided with a plurality of unevenly distributed lines.

5. The waste heat diversion device during the combustion of a thermal power plant boiler according to claim 2, characterized in that: The outer wall of the reset pipe (8) is provided with a plurality of filter openings (25).

6. The waste heat diversion device during the combustion of a thermal power plant boiler according to claim 2, characterized in that: A first groove (26) is provided on the top of the reset block (11).

7. The waste heat diversion device during the combustion of a thermal power plant boiler according to any one of claims 1-3, characterized in that: The delivery pipe (2) inside the heat exchange box (1) is curved.

8. The waste heat diversion device during the combustion of a thermal power plant boiler according to any one of claims 1-3, characterized in that: A second groove (28) is provided at the bottom of the inner wall of the delivery pipe (2) in the heat exchange box (1).

9. The waste heat diversion device during the combustion of the boiler in a thermal power plant according to claim 2, characterized in that: A fixing ring (31) is fixedly mounted on the outer wall of the connecting pipe (5); an elastic block (32) is coaxially fixedly connected to the rotating column (7); the elastic block (32) is located inside the fixing ring (31); a plurality of elastic parts corresponding to the openings on the rotating column (7) are provided on the outer wall of the elastic block (32); and a groove in which the elastic parts can be embedded is provided on the inner ring of the fixing ring (31).

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