Steam boiler waste heat recovery device

Abstract

The utility model relates to the technical field of waste heat recovery, in particular to a steam boiler waste heat recovery device which comprises a steam boiler, the bottom of the steam boiler is fixedly connected with an installation frame, the steam boiler is fixedly communicated with a second connecting pipe, and the upper end of the second connecting pipe is fixedly communicated with a first connecting pipe. A smoke exhaust pipe is fixedly connected to the upper end of the first connecting pipe, a waste heat recovery mechanism is fixedly connected to the interior of the first connecting pipe, a connecting plate is further fixedly connected to the left end of the mounting frame, and a water supply mechanism is further fixedly connected to the upper end of the connecting plate; the waste heat and heat carried by the smoke can fully heat water in all the heat conduction copper pipes arranged in the heat conduction copper pipes.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a waste heat recovery device for a steam boiler. Background Technology

[0002] In modern industrial production, steam boilers, as important energy conversion equipment, are widely used in many fields such as chemical, textile, and food processing. However, a significant problem exists in the operation of steam boilers: a large amount of energy is wasted. When a steam boiler burns fuel to produce steam, a large amount of waste heat is generated inside the combustion chamber, accompanied by the emission of smoke. This waste heat and smoke contain considerable energy. If directly released into the atmosphere, it not only causes a huge waste of energy but also pollutes the environment.

[0003] Currently, there are some waste heat recovery devices for steam boilers on the market, but most of them only recover the waste heat of the high-temperature flue gas discharged from the boiler. The recovery range is relatively narrow and cannot make full use of all the waste heat inside the combustion chamber. In addition, these traditional devices have a relatively simple way of treating the smoke. They often only perform preliminary filtration before emission and fail to utilize the energy contained in the smoke.

[0004] Therefore, it is of great significance to develop a steam boiler waste heat recovery device that can fully recover the waste heat and smoke inside the combustion chamber and use the recovered energy to heat the water inside the recovery mechanism.

[0005] Chinese patent (authorization announcement number: CN 118499805 A) discloses a waste heat recovery and utilization device for steam boilers, relating to the field of steam boilers. The device includes a steam boiler body with a boiler support base at its bottom. Two sets of exhaust pipes are symmetrically distributed on one side of the steam boiler body. An exhaust valve is installed on the outside of each exhaust pipe. A heat exchange mechanism is located on one side of the steam boiler body, a dust removal mechanism is located on the other side, a power generation mechanism is located on the other side, and a purification mechanism is located on the other side. This waste heat recovery and utilization device utilizes the waste heat in the exhaust gas through the contact between the serpentine exhaust pipe in the heat exchange mechanism and the water in the inner storage cylinder. The flow and pressure of the exhaust gas drive the rotation of the power generation components within the power generation mechanism, thereby generating electricity for utilization. This significantly improves the practicality and utilization rate of the device.

[0006] The existing solutions mentioned above generate electricity by rotating the power generation components inside the power generation mechanism through exhaust gas. However, they cannot recover the smoke and waste heat after the combustion of materials inside the combustion chamber, which has limitations. Therefore, we propose a waste heat recovery device for steam boilers. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a waste heat recovery device for steam boilers, thus solving the problems mentioned below.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A waste heat recovery device for a steam boiler includes a steam boiler, a mounting bracket fixedly connected to the bottom of the steam boiler, a combustion chamber fixedly connected to the bottom of the steam boiler, a second connecting pipe fixedly connected to the left end of the combustion chamber, a first connecting pipe fixedly connected to the upper end of the second connecting pipe, and a flue pipe fixedly connected to the upper end of the first connecting pipe.

[0010] A waste heat recovery mechanism is fixedly connected inside the first connecting pipe, a connecting plate is fixedly connected to the left end of the mounting bracket, and a water supply mechanism is fixedly connected to the upper end of the connecting plate.

[0011] As a further aspect of this solution, the waste heat recovery mechanism includes a cylinder, which is fixedly connected to the front end of the second connecting pipe. A piston plate is slidably connected to the inner wall of the cylinder, and a first spring is fixedly connected between the bottom of the piston plate and the bottom end of the inner wall of the cylinder.

[0012] As a further aspect of this solution, a drive motor is fixedly installed at the bottom of the cylinder, and a recovery wheel is fixedly connected to the output end of the drive motor. A connecting rope is wound around the outer wall of the recovery wheel, and the free end of the connecting rope is fixedly connected to the bottom of the piston plate. The outer wall of the connecting rope slides against the inner wall of the cylinder.

[0013] As a further aspect of this solution, a plurality of heat-conducting copper pipes are fixedly connected to the inner wall of the first connecting pipe, and the plurality of heat-conducting copper pipes are fixedly connected to each other. The heat-conducting copper pipe located at the bottom of the inner wall of the first connecting pipe is fixedly connected to the cylinder through a pipe. The outer wall of the heat-conducting copper pipe located at the top of the inner wall of the first connecting pipe is fixedly connected to a matching pipe, and a pressure gauge is fixedly connected to the outer wall of the matching pipe.

[0014] As a further aspect of this solution, the water supply mechanism includes an electric telescopic rod, which is fixedly connected to the upper end of the connecting plate. A connecting circular plate is fixedly connected to the upper end of the electric telescopic rod. Two swing arms with reset functions are rotatably connected inside the connecting circular plate. A tension rope is fixedly connected between the bottom of each swing arm and the connecting plate. An abutment block is also fixedly connected to the upper end of the swing arm.

[0015] As a further aspect of this solution, a water storage tank is provided above the connecting circular plate. The bottom of the water storage tank abuts against the upper end of the connecting circular plate. A sliding inner tube is fixedly connected to the bottom end of the water storage tank. An elastic telescopic tube is fixedly connected to the inner wall of the sliding inner tube. An abutment hole is opened at the upper end of the sliding inner tube. An abutment ball is fixedly connected to the upper end of the elastic telescopic tube. The outer wall of the abutment ball abuts against the inner wall of the abutment hole. A suction tube is fixedly connected to the bottom of the sliding inner tube.

[0016] As a further aspect of this solution, a sliding outer tube is fixedly connected to the bottom of the mating tube, and an abutment post is fixedly connected to the inner wall of the sliding outer tube.

[0017] Beneficial effects

[0018] This invention provides a waste heat recovery device for a steam boiler. Compared with the prior art, it has the following advantages:

[0019] This waste heat recovery device for steam boilers allows the waste heat and smoke generated during combustion inside the combustion chamber to flow sequentially through the second connecting pipe, the first connecting pipe, and the exhaust pipe. During this process, the heat carried by the waste heat and smoke can fully heat the water in all the heat-conducting copper pipes arranged in the system. This innovative design achieves efficient recovery and utilization of energy that would otherwise be wasted, greatly improving energy efficiency, reducing fuel consumption, lowering production costs, and effectively utilizing the smoke. Attached Figure Description

[0020] Figure 1 This is a front view of the main body of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the first connecting pipe of the main body of this utility model;

[0022] Figure 3 This is a schematic diagram of the position and structure of the main drive motor of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the sliding outer tube of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the main water storage tank of this utility model.

[0025] In the diagram: 1. Steam boiler; 2. Mounting bracket; 3. Combustion chamber; 4. First connecting pipe; 5. Second connecting pipe; 6. Water storage tank; 7. Exhaust pipe; 8. Connecting plate; 9. Pressure gauge; 10. Heat-conducting copper pipe; 11. Sliding rod; 12. Cylinder; 13. First spring; 14. Drive motor; 15. Piston plate; 16. Connecting rope; 17. Recovery wheel; 18. Abutment column; 19. Sliding outer pipe; 20. Abutment ball; 21. Sliding inner pipe; 22. Water injection valve; 23. Swing arm; 24. Abutment block; 25. Tension rope; 26. Electric telescopic rod; 27. Matching pipe; 28. Connecting circular plate; 29. ​​Suction pipe; 30. Elastic telescopic pipe; 101. Waste heat recovery mechanism; 201. Water supply mechanism. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figure 1 - Figure 2 As shown, this utility model provides a technical solution: a waste heat recovery device for a steam boiler, including a steam boiler 1, a mounting bracket 2 fixedly connected to the bottom of the steam boiler 1, a combustion chamber 3 fixedly connected to the bottom of the steam boiler 1, and a second connecting pipe 5 fixedly connected to the left end of the combustion chamber 3, a first connecting pipe 4 fixedly connected to the upper end of the second connecting pipe 5, and a flue pipe 7 fixedly connected to the upper end of the first connecting pipe 4. The combustion chamber 3, the second connecting pipe 5, the first connecting pipe 4 and the flue pipe 7 are connected in one piece. When combustion occurs inside the combustion chamber 3, the smoke will enter the interior of the first connecting pipe 4 through the second connecting pipe 5, and then be discharged from the first connecting pipe 4 through the flue pipe 7. A waste heat recovery mechanism 101 is fixedly connected inside the first connecting pipe 4. A connecting plate 8 is also fixedly connected to the left end of the mounting bracket 2, and a water supply mechanism 201 is also fixedly connected to the upper end of the connecting plate 8.

[0028] Example 2: Please refer to Figure 2 - Figure 3As shown, the waste heat recovery mechanism 101 includes a cylinder 12, which is fixedly connected to the front end of the second connecting pipe 5. A piston plate 15 is slidably connected to the inner wall of the cylinder 12. Specifically, two sliding rods 11 are fixedly connected to the inner wall of the piston plate 15. The two sliding rods 11 are symmetrically distributed on the inner wall of the piston plate 15. Two sliding ports are opened on the outer wall of the piston plate 15. The outer wall of each sliding rod 11 is slidably connected to the inner wall of the adjacent sliding port. The inner wall of the sliding port and the outer wall of the sliding rod 11 are coated with lubricating oil. When the piston plate 15 slides on the outer wall of the sliding rod 11 through the sliding port, the sliding rod 11 can limit the piston plate 15 through the sliding port and also guide the piston plate 15, which improves the stability of the piston plate 15 when it moves. The lubricating oil can also reduce the friction between the sliding port and the sliding rod 11, thereby extending the service life of the sliding port and the sliding rod 11.

[0029] A first spring 13 is fixedly connected between the bottom of the piston plate 15 and the bottom of the inner wall of the cylinder 12, and the first spring 13 can drive the piston plate 15 to quickly reset. A vent is provided at the bottom of the cylinder 12. When the piston plate 15 moves downward, the gas inside the cylinder 12 will be discharged from the vent by the piston plate 15. A drive motor 14 is fixedly installed at the bottom of the cylinder 12. A recovery wheel 17 is fixedly connected to the output end of the drive motor 14. A connecting rope 16 is wound around the outer wall of the recovery wheel 17. The free end of the connecting rope 16 is fixedly connected to the bottom of the piston plate 15, and the outer wall of the connecting rope 16 slides against the inner wall of the cylinder 12.

[0030] A plurality of heat-conducting copper pipes 10 are fixedly connected to the inner wall of the first connecting pipe 4. The plurality of heat-conducting copper pipes 10 are arranged in an upper and lower array in the inner wall of the first connecting pipe 4. The plurality of heat-conducting copper pipes 10 are fixedly connected to each other. The lowermost heat-conducting copper pipe 10 in the inner wall of the first connecting pipe 4 is fixedly connected to the cylinder 12 through a pipe. The outer wall of the uppermost heat-conducting copper pipe 10 in the inner wall of the first connecting pipe 4 is fixedly connected to a matching pipe 27, and a pressure gauge 9 is fixedly connected to the outer wall of the matching pipe 27. The pressure gauge 9 is used to monitor the pressure inside the heat-conducting copper pipe 10 to prevent safety hazards caused by excessive pressure inside the heat-conducting copper pipe 10.

[0031] Please see Figure 4 - Figure 5As shown, the water supply mechanism 201 includes an electric telescopic rod 26, which is fixedly connected to the upper end of the connecting plate 8. A connecting circular plate 28 is fixedly connected to the upper end of the electric telescopic rod 26. The connecting circular plate 28 is also rotatably connected to two swing arms 23 with reset function through a rotating shaft. The two swing arms 23 are symmetrically distributed in the interior of the connecting circular plate 28. A tension rope 25 is fixedly connected between the bottom of each swing arm 23 and the connecting plate 8. An abutment block 24 is fixedly connected to the upper end of the swing arm 23. A water storage tank 6 is provided above the connecting circular plate 28. The bottom of the water storage tank 6 abuts against the upper end of the connecting circular plate 28. The outer wall of the abutment block 24 is provided with a curved surface. The curved surface can better fit the abutment block 24 against the outer wall of the first connecting pipe 4.

[0032] A sliding inner tube 21 is fixedly connected to the bottom of the water storage tank 6. An elastic telescopic tube 30 is fixedly connected to the inner wall of the sliding inner tube 21. An abutment hole is opened at the upper end of the sliding inner tube 21. An abutment ball 20 is fixedly connected to the upper end of the elastic telescopic tube 30. The abutment ball 20 is spherical and its outer wall abuts against the inner wall of the abutment hole. A water injection valve 22 is also fixedly connected to the upper end of the water storage tank 6. The water injection valve 22 can inject water into the water storage tank 6. A suction tube 29 is fixedly connected to the bottom of the sliding inner tube 21.

[0033] The bottom of the fitting tube 27 is fixedly connected to a sliding outer tube 19, and the inner wall of the sliding outer tube 19 is fixedly connected to an abutment post 18. The diameter of the sliding outer tube 19 is larger than the diameter of the sliding inner tube 21, and the inner wall of the sliding inner tube 21 can fit against the inner wall of the sliding outer tube 19.

[0034] Working principle: When in use, start the electric telescopic rod 26. The electric telescopic rod 26 drives the connecting circular plate 28 to move upward. The connecting circular plate 28 drives the water storage tank 6 and the sliding inner tube 21 to move upward. The sliding inner tube 21 will enter the inner wall of the sliding outer tube 19. The abutting column 18 will push the abutting ball 20 open. At this time, the sliding outer tube 19 and the sliding inner tube 21 are connected to each other. During the upward movement of the connecting circular plate 28, the tension rope 25 will pull the swing arm 23. The swing arm 23 drives the abutting block 24 to rotate. The two abutting blocks 24 will abut and fix against the outer wall of the water storage tank 6.

[0035] Water is then injected into the water storage tank 6 through the water injection valve 22. At this time, the drive motor 14 is started, and the drive motor 14 drives the recovery wheel 17 to rotate. The recovery wheel 17 pulls the connecting rope 16, and the connecting rope 16 pulls the piston plate 15. At this time, a negative pressure is generated inside the cylinder 12, which will suck up all the heat-conducting copper pipes 10. At this time, the heat-conducting copper pipes 10 will suck up the mating pipe 27, the sliding outer pipe 19, and the sliding inner pipe 21. The sliding inner pipe 21 will suck up the water inside the water storage tank 6 through the suction pipe 29. When all the heat-conducting copper pipes 10 are full of water, the drive motor 14 stops starting. At this time, the drive motor 14 has a self-locking function. When the residual heat and smoke from the combustion inside the combustion chamber 3 pass through the second connecting pipe 5, the first connecting pipe 4, and the exhaust pipe 7, it will heat up the water inside all the heat-conducting copper pipes 10.

[0036] After heating is completed, the drive motor 14 is started to drive the recycling wheel 17 to rotate in the opposite direction. The first spring 13 drives the piston plate 15 to reset. At this time, the gas inside the cylinder 12 will push all the water inside the heat-conducting copper pipe 10 back into the water storage tank 6. The electric telescopic rod 26 drives the connecting round plate 28 to reset with the water storage tank 6. The sliding inner tube 21 and the sliding outer tube 19 disengage from each other. The abutting ball 20 and the abutting post 18 also disengage from each other. The elastic telescopic tube 30 drives the abutting ball 20 to reset. The abutting ball 20 abuts against the abutting hole. The swing arm 23 will drive the abutting block 24 to disengage from the abutting against the outer wall of the water storage tank 6.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0038] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a steam boiler, comprising a steam boiler (1), characterized in that: The bottom of the steam boiler (1) is fixedly connected to an mounting bracket (2), and the bottom of the steam boiler (1) is fixedly connected to a combustion chamber (3). The left end of the combustion chamber (3) is fixedly connected to a second connecting pipe (5), the upper end of the second connecting pipe (5) is fixedly connected to a first connecting pipe (4), and the upper end of the first connecting pipe (4) is fixedly connected to a flue pipe (7). The first connecting pipe (4) is fixedly connected to a waste heat recovery mechanism (101), the left end of the mounting bracket (2) is also fixedly connected to a connecting plate (8), and the upper end of the connecting plate (8) is also fixedly connected to a water supply mechanism (201).

2. The waste heat recovery device for a steam boiler according to claim 1, characterized in that: The waste heat recovery mechanism (101) includes a cylinder (12), which is fixedly connected to the front end of the second connecting pipe (5). A piston plate (15) is slidably connected to the inner wall of the cylinder (12), and a first spring (13) is fixedly connected between the bottom of the piston plate (15) and the bottom end of the inner wall of the cylinder (12).

3. The waste heat recovery device for a steam boiler according to claim 2, characterized in that: A drive motor (14) is fixedly installed at the bottom of the cylinder (12). A recovery wheel (17) is fixedly connected to the output end of the drive motor (14). A connecting rope (16) is wound around the outer wall of the recovery wheel (17). The free end of the connecting rope (16) is fixedly connected to the bottom of the piston plate (15), and the outer wall of the connecting rope (16) slides against the inner wall of the cylinder (12).

4. The waste heat recovery device for a steam boiler according to claim 3, characterized in that: The inner wall of the first connecting pipe (4) is fixedly connected with a plurality of heat-conducting copper pipes (10), and the plurality of heat-conducting copper pipes (10) are fixedly connected to each other. The lowermost heat-conducting copper pipe (10) in the inner wall of the first connecting pipe (4) is fixedly connected to the cylinder (12) through a pipe. The outer wall of the uppermost heat-conducting copper pipe (10) in the inner wall of the first connecting pipe (4) is fixedly connected with a matching pipe (27), and the outer wall of the matching pipe (27) is fixedly connected with a pressure gauge (9).

5. A steam boiler waste heat recovery device according to claim 1, characterized in that: The water supply mechanism (201) includes an electric telescopic rod (26), which is fixedly connected to the upper end of the connecting plate (8). A connecting circular plate (28) is fixedly connected to the upper end of the electric telescopic rod (26). Two swing arms (23) with reset function are rotatably connected inside the connecting circular plate (28). A tension rope (25) is fixedly connected between the bottom of each swing arm (23) and the connecting plate (8). An abutment block (24) is also fixedly connected to the upper end of the swing arm (23).

6. A steam boiler waste heat recovery device according to claim 5, characterized in that: A water storage tank (6) is provided above the connecting circular plate (28). The bottom of the water storage tank (6) abuts against the upper end of the connecting circular plate (28). A sliding inner tube (21) is fixedly connected to the bottom end of the water storage tank (6). An elastic telescopic tube (30) is fixedly connected to the inner wall of the sliding inner tube (21). An abutment hole is opened at the upper end of the sliding inner tube (21). An abutment ball (20) is fixedly connected to the upper end of the elastic telescopic tube (30). The outer wall of the abutment ball (20) abuts against the inner wall of the abutment hole. A suction tube (29) is fixedly connected to the bottom of the sliding inner tube (21).

7. A steam boiler waste heat recovery device according to claim 4, characterized in that: The bottom of the fitting tube (27) is fixedly connected to a sliding outer tube (19), and the inner wall of the sliding outer tube (19) is fixedly connected to an abutment post (18).

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