Waste heat recycling device for boiler

Abstract

The utility model relates to the technical field of waste heat recycling of boilers, in particular to a waste heat recycling device for a boiler, which comprises an air inlet pipe, a box body is integrally formed on the outer side of the air inlet pipe, a recycling mechanism is arranged on the inner side of the air inlet pipe, and the air inlet pipe is connected with a smoke exhaust pipe of the boiler through a flange at the end. Flue gas with heat enters the gas inlet pipe, water enters the fixed pipe through the first water inlet pipe and absorbs heat of the flue gas in the gas inlet pipe, the turbulence rods are arranged, after the water enters the fixed pipe, the water is disturbed, the flue gas penetrates through the fixed pipe and heats the water more uniformly, and the water enters the box body through the second water inlet pipe, so that the heat of the outer wall of the gas inlet pipe is absorbed. The flow deflectors are arranged in a spiral mode to form a spiral flow channel, the airflow path can be prolonged, the heat exchange efficiency can be improved, water in the box body is stirred through the spoilers, the water is mixed, heat is evenly absorbed, and the better heat recovery effect is achieved.

Description

Technical Field

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

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. The original meaning of "boiler" refers to a water-filled container heated over a fire, while "furnace" refers to the place where fuel is burned. A boiler consists of two main parts: the boiler and the furnace. The hot water or steam produced in a boiler can directly provide the heat energy needed for industrial production and daily life, or it can be converted into mechanical energy through a steam power unit, or further converted into electrical energy through a generator.

[0003] The flue gas emitted by boilers during operation contains a large amount of heat. Directly releasing it into the air would waste a lot of energy and would not meet the requirements of energy conservation and emission reduction. Existing waste heat recovery and utilization devices usually discharge hot gas into a heat exchange box to heat the water in the water pipes of the box. However, the hot gas is usually discharged directly, with a short residence time, low recovery efficiency, and large losses, making it difficult to fully recover the heat energy in the waste gas.

[0004] Therefore, a waste heat recovery and utilization device for boilers is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a waste heat recovery and utilization device for boilers. This device solves the problem that existing waste heat recovery and utilization devices typically discharge hot air into a heat exchange box to heat the water in the box's water pipes. However, the hot air is usually discharged directly, resulting in a short residence time, low recovery efficiency, and significant losses, making it difficult to fully recover the heat energy in the waste gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes an air intake pipe, with a housing integrally formed on the outer side of the air intake pipe, and a recovery mechanism provided on the inner side of the air intake pipe. The recovery mechanism includes a fixed pipe, a first water inlet pipe, a first water outlet pipe, a baffle rod, and a guide vane. The fixed pipe is fixedly connected to the inner side of the air intake pipe, the first water inlet pipe is fixedly connected to the outer side of one end of the fixed pipe, the first water outlet pipe is fixedly connected to the outer side of the other end of the fixed pipe, the baffle rod is integrally formed on the inner side of the fixed pipe, and the guide vane is welded and fixed to the inner side of the air intake pipe.

[0007] Preferably, the guide vane is welded and fixed to the outside of the fixed tube, and the fixed tube is fixedly connected to the intake pipe through the guide vane.

[0008] Preferably, the guide vanes are spirally arranged, and the turbulence rods are equidistantly distributed on the inner wall of the fixed tube.

[0009] Preferably, a second water inlet pipe is welded and fixedly connected to the top of the box, and a second water outlet pipe is welded and fixedly connected to the top of the box.

[0010] Preferably, the inner side of the housing is provided with a toggle mechanism, which includes a rotating shaft, a spoiler, a gear, a bracket, an electric push rod, a guide rail, a slide groove, a carriage, and a toothed groove. The rotating shaft is rotatably connected through the inner side of the housing. The spoiler is welded and fixed to the outer side of the rotating shaft. The gear is fixedly connected to the end of the housing. The bracket is fixedly connected to the top of the housing. The electric push rod is fixedly connected to the top of the bracket. The guide rail is fixedly connected to one side of the housing. The slide groove is opened on one side of the guide rail. The carriage is slidably connected to the inner side of the slide groove. The toothed groove is opened on the outer side of the carriage. A protective cover is fixedly connected to the outer side of the carriage.

[0011] Preferably, the carriage is connected to a gear via a toothed groove, and the output end of the electric actuator is fixedly connected to the top of the carriage.

[0012] Preferably, the end section of the slide is T-shaped, and the outer wall of the slide frame is in contact with the inner wall of the slide.

[0013] Compared with the prior art, this utility model provides a waste heat recovery and utilization device for boilers, which has the following beneficial effects:

[0014] 1. The intake pipe is connected to the boiler's exhaust pipe via a flange at the end. The heated flue gas enters the intake pipe, and water enters the fixed pipe through the first water inlet pipe to absorb the heat from the flue gas in the intake pipe. The baffle bar turbulents the water after it enters the fixed pipe, allowing the flue gas to pass through the fixed pipe and heat the water more evenly. The water enters the housing through the second water inlet pipe, thereby absorbing the heat from the outer wall of the intake pipe and achieving a better waste heat recovery effect.

[0015] 2. The guide vanes are spirally arranged to form a spiral flow channel, which can extend the airflow path and improve the efficiency of heat exchange.

[0016] 3. The electric actuator pushes the slide to slide back and forth, and guides it through the slide groove. It is connected to the gear through the tooth groove, thereby driving the rotating shaft to rotate back and forth. The baffle moves the water in the box to mix the water and absorb heat evenly, thus achieving a better heat recovery effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the flow guide plate structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the spoiler's position and structure according to this utility model;

[0020] Figure 4 This is a schematic diagram of the guide rail structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the protective cover structure of this utility model.

[0022] In the diagram: 1. Air inlet pipe; 2. Housing; 3. Fixed pipe; 4. First water inlet pipe; 5. First water outlet pipe; 6. Baffle rod; 7. Guide vane; 8. Second water inlet pipe; 9. Second water outlet pipe; 10. Shaft; 11. Baffle plate; 12. Gear; 13. Bracket; 14. Electric actuator; 15. Guide rail; 16. Slide groove; 17. Carriage; 18. Gear groove; 19. Protective cover. Detailed Implementation

[0023] 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.

[0024] Example:

[0025] Please see Figures 1-5 This embodiment of a waste heat recovery device for a boiler includes an air inlet pipe 1. A housing 2 is integrally formed on the outer side of the air inlet pipe 1. A recovery mechanism is provided on the inner side of the air inlet pipe 1. The recovery mechanism includes a fixed pipe 3, a first water inlet pipe 4, a first water outlet pipe 5, a baffle rod 6, and a guide plate 7. The fixed pipe 3 is fixedly connected to the inner side of the air inlet pipe 1. The first water inlet pipe 4 is fixedly connected to the outer side of one end of the fixed pipe 3. The first water outlet pipe 5 is fixedly connected to the outer side of the other end of the fixed pipe 3. The baffle rod 6 is integrally formed on the inner side of the fixed pipe 3. The guide plate 7 is welded and fixed to the inner side of the air inlet pipe 1.

[0026] The intake pipe 1 is connected to the boiler's exhaust pipe via a flange at the end. The heated flue gas enters the intake pipe 1. Water enters the fixed pipe 3 through the first water inlet pipe 4, absorbing the heat from the flue gas in the intake pipe 1. The baffle rod 6 turbulently flows the water after it enters the fixed pipe 3, allowing the flue gas to pass through the fixed pipe 3 and heat the water more evenly. The water enters the housing 2 through the second water inlet pipe 8, thereby absorbing the heat from the outer wall of the intake pipe 1 and achieving better waste heat recovery. The guide vane 7 is spirally designed to form a spiral flow channel, which can extend the airflow path and improve the efficiency of heat exchange.

[0027] Furthermore, the guide vane 7 is welded and fixed to the outside of the fixed tube 3, and the fixed tube 3 is fixedly connected to the intake pipe 1 through the guide vane 7.

[0028] Furthermore, the guide vanes 7 are spirally arranged, and the turbulence rods 6 are evenly distributed on the inner wall of the fixed tube 3.

[0029] Furthermore, a second water inlet pipe 8 is welded and fixedly connected to the top of the tank body 2, and a second water outlet pipe 9 is welded and fixedly connected to the top of the tank body 2.

[0030] To better absorb heat, an actuation mechanism is provided on the inner side of the housing 2. The actuation mechanism includes a rotating shaft 10, a spoiler 11, a gear 12, a bracket 13, an electric push rod 14, a guide rail 15, a slide 16, a carriage 17, and a toothed groove 18. The rotating shaft 10 is rotatably connected to the inner side of the housing 2. The spoiler 11 is welded and fixed to the outer side of the rotating shaft 10. The gear 12 is fixedly connected to the end of the housing 2. The bracket 13 is fixedly connected to the top of the housing 2. The electric push rod 14 is fixedly connected to the top of the bracket 13. The guide rail 15 is fixedly connected to one side of the housing 2. The slide 16 is opened on one side of the guide rail 15. The carriage 17 is slidably connected to the inner side of the slide 16. The toothed groove 18 is opened on the outer side of the carriage 17. A sealing structure is provided at the connection between the rotating shaft 10 and the housing 2. A protective cover 19 is fixedly connected to the outer side of the carriage 17.

[0031] The electric push rod 14 pushes the slide 17 to slide back and forth, and guides it through the slide groove 16. It is connected to the gear 12 through the tooth groove 18, thereby driving the rotating shaft 10 to rotate back and forth. The water in the box 2 is stirred by the baffle 11, which mixes the water and absorbs heat evenly, thus achieving a better heat recovery effect.

[0032] Furthermore, the carriage 17 is connected to the gear 12 via the toothed groove 18, and the output end of the electric actuator 14 is fixedly connected to the top of the carriage 17.

[0033] Furthermore, the end section of the slide 16 is designed with a T-shaped structure, and the outer wall of the carriage 17 fits against the inner wall of the slide 16.

[0034] The working principle of the above embodiment is as follows: the air inlet pipe 1 is connected to the boiler's flue pipe through the flange at the end. The flue gas with heat enters the air inlet pipe 1. Water enters the fixed pipe 3 through the first water inlet pipe 4 and absorbs the heat of the flue gas in the air inlet pipe 1. The baffle rod 6 is set so that the water enters the fixed pipe 3 and turbulences the water, so that the flue gas passes through the fixed pipe 3 and heats the water more evenly. The water enters the box 2 through the second water inlet pipe 8, thereby absorbing the heat of the outer wall of the air inlet pipe 1 and achieving a better waste heat recovery effect. The guide plate 7 is set in a spiral shape to form a spiral flow channel, which can extend the airflow path and improve the heat exchange efficiency. The electric push rod 14 pushes the slide 17 to slide back and forth and guides it through the slide groove 16. It is connected to the gear 12 through the tooth groove 18, thereby driving the rotating shaft 10 to rotate back and forth. The baffle plate 11 stirs the water in the box 2, mixes the water, absorbs heat evenly, and achieves a better heat recovery effect.

[0035] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0036] 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 and utilization device for boilers, characterized in that: The system includes an air intake pipe (1), with a housing (2) integrally formed on the outer side of the air intake pipe (1). A recovery mechanism is provided on the inner side of the air intake pipe (1). The recovery mechanism includes a fixed pipe (3), a first water inlet pipe (4), a first water outlet pipe (5), a baffle rod (6), and a guide plate (7). The fixed pipe (3) is fixedly connected to the inner side of the air intake pipe (1). The first water inlet pipe (4) is fixedly connected to the outer side of one end of the fixed pipe (3). The first water outlet pipe (5) is fixedly connected to the outer side of the other end of the fixed pipe (3). The baffle rod (6) is integrally formed on the inner side of the fixed pipe (3). The guide plate (7) is welded and fixed to the inner side of the air intake pipe (1).

2. The waste heat recovery and utilization device for boilers according to claim 1, characterized in that: The guide vane (7) is welded and fixed to the outside of the fixed tube (3), and the fixed tube (3) is fixedly connected to the air intake pipe (1) through the guide vane (7).

3. The waste heat recovery and utilization device for boilers according to claim 1, characterized in that: The guide vane (7) is spirally arranged, and the turbulence rods (6) are evenly distributed on the inner wall of the fixed tube (3).

4. A waste heat recovery and utilization device for a boiler according to claim 1, characterized in that: The top of the box (2) is welded and fixedly connected to a second water inlet pipe (8), and the top of the box (2) is welded and fixedly connected to a second water outlet pipe (9).

5. A waste heat recovery and utilization device for a boiler according to claim 4, characterized in that: The inner side of the housing (2) is provided with a toggle mechanism, which includes a rotating shaft (10), a spoiler (11), a gear (12), a bracket (13), an electric push rod (14), a guide rail (15), a slide rail (16), a carriage (17), and a toothed groove (18). The rotating shaft (10) is rotatably connected to the inner side of the housing (2), the spoiler (11) is welded and fixed to the outer side of the rotating shaft (10), and the gear (12) is fixedly connected to the inner side of the housing (2). At the end, the bracket (13) is fixedly connected to the top of the housing (2), the electric push rod (14) is fixedly connected to the top of the bracket (13), the guide rail (15) is fixedly connected to one side of the housing (2), the slide groove (16) is opened on one side of the guide rail (15), the slide (17) is slidably connected to the inner side of the slide groove (16), the toothed groove (18) is opened on the outer side of the slide (17), and a protective cover (19) is fixedly connected to the outer side of the slide (17).

6. A waste heat recovery and utilization device for a boiler according to claim 5, characterized in that: The slide (17) is connected to the gear (12) through a toothed groove (18), and the output end of the electric push rod (14) is fixedly connected to the top of the slide (17).

7. A waste heat recovery and utilization device for a boiler according to claim 5, characterized in that: The end section of the slide (16) is T-shaped, and the outer wall of the slide (17) is in contact with the inner wall of the slide (16).

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