Waste heat utilization device for tail flue gas of condensed natural gas boiler

Abstract

The utility model discloses a tail flue gas waste heat utilization device of a condensed natural gas boiler, and relates to the technical field of energy utilization. The device comprises two supporting plates and a tank body fixedly installed on the two supporting plates, a rotating mechanism and a circulating mechanism are arranged on the supporting plates, the rotating mechanism comprises an L-shaped supporting rod fixedly installed on the left side of the tank body, a motor is fixedly installed on the right side of the L-shaped supporting rod, and the rotating mechanism and the circulating mechanism are fixedly installed on the left side of the L-shaped supporting rod. A first rotating shaft is fixedly installed on an output shaft of the motor, a gear is fixedly arranged on the outer wall of the first rotating shaft in a sleeving mode, two supporting assemblies are fixedly installed in the tank body, and a metal pipe is rotationally installed on the two supporting assemblies. By arranging the rotating mechanism, flue gas enters the tank body through the flue and then drives the motor, the motor drives the first rotating shaft, the first rotating shaft drives the gear on the first rotating shaft to rotate, and the gear is meshed with the large gear on the metal pipe in the tank body, so that the metal pipe is synchronously driven by the first rotating shaft to rotate.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy utilization, and particularly relates to a device for utilizing the waste heat of tail flue gas from a condensing natural gas boiler. Background Art

[0002] In the related technology, a device for utilizing the waste heat of the tail flue gas of a condensing natural gas boiler is disclosed with publication number CN212806071U, which includes a boiler body, an air guide pipe is fixedly connected to the upper right end of the boiler body, a water tank is provided above the right side of the boiler body, the right end of the air guide pipe passes through the water tank and is fixedly connected to a filter box, and a heat exchanger is fixedly connected to the upper end of the boiler body.

[0003] During the process of exhausting flue gas, the filter plate in the exhaust device is fixedly installed, so that the exhausted flue gas will accumulate too much in certain areas, thereby increasing the risk of blockage, affecting the normal passage of flue gas, and further causing a decrease in filtration efficiency. At the same time, excessive accumulation of flue gas in certain areas will also increase the need for cleaning and maintenance. Utility Model Content

[0004] The purpose of the utility model is to provide a device for utilizing the waste heat of the flue gas at the tail end of a condensing natural gas boiler. Through a rotating mechanism, the problem of using a fixed installation method, which causes the discharged flue gas to accumulate too much in certain areas, thereby increasing the risk of blockage, affecting the normal passage of the flue gas, and further causing a decrease in the filtration efficiency. At the same time, excessive accumulation of flue gas in certain areas will also increase the need for cleaning and maintenance.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a device for utilizing waste heat from tail flue gas of a condensing natural gas boiler, comprising two support plates and a tank body fixedly mounted on the two support plates, wherein a rotating mechanism and a circulating mechanism are arranged on the support plates;

[0007] The rotating mechanism includes an L-shaped support rod fixedly installed on the left side of the tank body, a motor fixedly installed on the right side of the L-shaped support rod, a rotating shaft 1 fixedly installed on the output shaft of the motor, a gear fixedly sleeved on the outer wall of the rotating shaft 1, two supporting assemblies fixedly installed in the tank body, and metal pipes rotatably installed on the two supporting assemblies.

[0008] Furthermore, the left and right sides of the metal tube extend outside the tank body respectively and are rotatably connected to the tank body. A large gear is fixedly sleeved on the outer wall of the metal tube, and the large gear is meshed with the gear.

[0009] Furthermore, a smoke exhaust pipe is fixedly installed on the left side of the tank body, a smoke exhaust hole is opened on the right side of the smoke exhaust pipe, the smoke exhaust hole is communicated with the tank body, a support rod is fixedly installed in the smoke exhaust hole, a second rotating shaft is rotatably installed on the support rod, a filter plate is fixedly sleeved on the outer wall of the second rotating shaft, pulleys are fixedly sleeved on the outer walls of the second rotating shaft and the first rotating shaft respectively, and belts are wound around the outer walls of the two pulleys.

[0010] Furthermore, the circulation mechanism includes a water tank arranged at the bottom of the tank body, a water pump is fixedly installed on the right side of the water tank, a delivery pipe is fixedly installed on the right side of the water pump, the delivery pipe passes through the corresponding support plate, a connecting rotor is rotatably installed on the right side of the metal pipe, and the water outlet end of the delivery pipe is fixedly connected to the connecting rotor.

[0011] Furthermore, a second connecting rotor is rotatably installed on the left side of the metal tube, a heat exchanger is fixedly installed on the left side of the second connecting rotor, and an insulation tube is fixedly installed on the top of the heat exchanger.

[0012] Furthermore, a heat dissipation pipe is fixedly installed on the left side of the heat exchanger, the heat dissipation pipe passes through the corresponding support plate, and the water outlet end of the heat dissipation pipe is fixedly connected to the water tank.

[0013] The utility model has the following beneficial effects:

[0014] (1) The utility model sets a rotating mechanism, and the smoke enters the tank body through the flue, and then drives the motor. The motor drives the rotating shaft 1, and the rotating shaft 1 drives the gear on it to rotate. The gear meshes with the large gear on the metal tube in the tank body, so that the metal tube is rotated synchronously with the rotating shaft 1. Through the rotation of the metal tube, the water in the metal tube can be evenly heated by the smoke. While the rotating shaft 1 rotates, the rotating shaft 1 also drives the rotating shaft 2 through the belt, and the rotating shaft 2 drives the filter plate. Through the rotation of the filter plate, the excessive accumulation of particles on the filter plate can be avoided, the clogging and resistance of the filter plate can be reduced, and the service life of the filter plate can be extended. At the same time, the rotation of the filter plate can also reduce the frequency of cleaning and maintenance, so that the particles in the smoke are evenly distributed on the filter plate, and the accumulation of particles in a specific area is reduced, thereby reducing the need for cleaning and maintenance.

[0015] (2) The utility model sets a circulation mechanism. When the flue gas is utilized, the water pump can be started. The water pump will absorb water from the water tank and transport it to the metal pipe rotating with it through the delivery pipe. The metal pipe then contacts the flue gas through rotation, so that the flue gas can evenly heat the water in the metal pipe. The heat in the heated water is stored in the heat exchanger, and the heat is reintroduced into the boiler body through the insulation pipe, so that the heat in the tail flue gas can be utilized, thereby saving energy. The converted water is then cooled by the heat dissipation pipe and then returned to the water tank for recycling, thereby saving water.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the structure of a device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to the utility model;

[0019] Figure 2 This is a front cross-sectional structural schematic diagram of a device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to the utility model;

[0020] Figure 3 This is a schematic diagram of the rear oblique view of the structure of a device for utilizing waste heat from flue gas at the tail of a condensing natural gas boiler according to the utility model;

[0021] Figure 4 For this utility model Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0022] Figure 5 For this utility model Figure 1 Schematic diagram of the enlarged structure of B.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Support plate; 2. Tank body; 3. L-shaped support rod; 4. Motor; 5. Rotating shaft 1; 6. Gear; 7. Support assembly; 8. Metal pipe; 9. Large gear; 10 Smoke exhaust pipe; 11. Smoke exhaust hole; 12. Support rod; 13. Rotating shaft 2; 14. Filter plate; 15. Pulley; 16. Belt; 17. Water tank; 18. Water pump; 19. Delivery pipe; 20. Connecting rotor 1; 21. Connecting rotor 2; 22. Heat exchanger; 23. Insulation pipe; 24. Heat dissipation pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 As shown, the utility model is a device for utilizing waste heat from tail flue gas of a condensing natural gas boiler, comprising two support plates 1 and a tank body 2 fixedly mounted on the two support plates 1, wherein a rotating mechanism and a circulating mechanism are arranged on the support plates 1;

[0027] The rotating mechanism includes an L-shaped support rod 3 fixedly installed on the left side of the tank body 2, a motor 4 fixedly installed on the right side of the L-shaped support rod 3, a rotating shaft 5 fixedly installed on the output shaft of the motor 4, a gear 6 fixedly sleeved on the outer wall of the rotating shaft 5, two supporting assemblies 7 fixedly installed in the tank body 2, and metal pipes 8 rotatably installed on the two supporting assemblies 7.

[0028] Among them Figure 4 As shown, the left and right sides of the metal tube 8 extend outside the tank body 2 respectively and are rotatably connected to the tank body 2 . A large gear 9 is fixedly sleeved on the outer wall of the metal tube 8 , and the large gear 9 is meshed with the gear 6 .

[0029] By providing two support plates 1 and a tank body 2 fixedly mounted on the two support plates 1, the invention is characterized in that: a rotating mechanism and a circulating mechanism are provided on the support plate 1;

[0030] Among them Figure 4 As shown, a smoke exhaust pipe 10 is fixedly installed on the left side of the tank body 2, and a smoke exhaust hole 11 is opened on the right side of the smoke exhaust pipe 10. The smoke exhaust hole 11 is communicated with the tank body 2. A support rod 12 is fixedly installed in the smoke exhaust hole 11, and a rotating shaft 13 is rotatably installed on the support rod 12. A filter plate 14 is fixedly sleeved on the outer wall of the rotating shaft 13, and pulleys 15 are fixedly sleeved on the outer walls of the rotating shaft 13 and the rotating shaft 1 5 respectively, and belts 16 are wound around the outer walls of the two pulleys 15.

[0031] By arranging that while the rotating shaft 1 5 rotates, the rotating shaft 1 5 also drives the rotating shaft 2 13 through the belt 16, and the rotating shaft 2 13 drives the filter plate 14. Through the rotation of the filter plate 14, the excessive accumulation of particulate matter on the filter plate 14 can be avoided, and the clogging and resistance of the filter plate 14 can be reduced, thereby extending the service life of the filter plate 14. At the same time, the rotation of the filter plate 14 can also reduce the frequency of cleaning and maintenance, so that the particulate matter in the flue gas is evenly distributed on the filter plate 14, reducing the accumulation of particulate matter in a specific area, thereby reducing the need for cleaning and maintenance.

[0032] Among them Figure 2 As shown, the circulation mechanism includes a water tank 17 arranged at the bottom of the tank body 2, a water pump 18 is fixedly installed on the right side of the water tank 17, a delivery pipe 19 is fixedly installed on the right side of the water pump 18, the delivery pipe 19 passes through the corresponding support plate 1, and a connecting rotor 20 is rotatably installed on the right side of the metal tube 8, and the water outlet end of the delivery pipe 19 is fixedly connected to the connecting rotor 20.

[0033] By setting up a circulation mechanism, when the flue gas is utilized, the water pump 18 can be started, the water pump 18 will absorb water from the water tank 17 and transport it to the metal pipe 8 rotating therewith through the delivery pipe 19. The metal pipe 8 then contacts the flue gas through rotation, so that the flue gas can evenly heat the water in the metal pipe 8.

[0034] Among them Figure 5 As shown, a second connecting rotor 21 is rotatably installed on the left side of the metal tube 8 , a heat exchanger 22 is fixedly installed on the left side of the second connecting rotor 21 , and a thermal insulation tube 23 is fixedly installed on the top of the heat exchanger 22 .

[0035] By arranging heated water, the heat in the heated water is stored through the provided heat exchanger 22, and the heat is reintroduced into the boiler body through the insulation pipe 23, so as to facilitate the utilization of the heat in the tail flue gas, thereby saving energy.

[0036] Among them Figure 5 As shown, a heat dissipation pipe 24 is fixedly installed on the left side of the heat exchanger 22 . The heat dissipation pipe 24 passes through the corresponding support plate 1 , and the water outlet end of the heat dissipation pipe 24 is fixedly connected to the water tank 17 .

[0037] The converted water is then returned to the water tank 17 for recycling after the converted water passes through the heat dissipation pipe 24 for heat dissipation, thereby saving water.

[0038] A specific application of this embodiment is: when in use, the flue gas first enters the tank body 2 through the flue, and then drives the motor 4, the motor 4 will drive the rotating shaft 5, the rotating shaft 5 drives the gear 6 thereon to rotate, the gear 6 is meshed with the large gear 9 on the metal pipe 8 of the tank body 2, so that the metal pipe 8 is synchronously rotated by the rotating shaft 5, and the metal pipe 8 can be synchronously started while the metal pipe 8 is rotating. The water pump 18 will absorb water from the water tank 17 and transport it to the metal pipe 8 rotating therewith through the delivery pipe 19. Through the rotation of the metal pipe 8, the water in the metal pipe 8 can be evenly heated by the flue gas, and the heated water will store the heat in the heated water through the heat exchanger 22 provided, and the heat will be re-introduced into the boiler through the insulation pipe 23. The heat in the tail flue gas is conveniently utilized to save energy. The converted water is returned to the water tank 17 for recycling after being dissipated through the heat dissipation pipe 24, so as to save water. While the shaft 1 5 rotates, the shaft 1 5 also drives the shaft 2 13 through the belt 16, and the shaft 2 13 drives the filter plate 14. Through the rotation of the filter plate 14, excessive accumulation of particles on the filter plate 14 can be avoided, and the blockage and resistance of the filter plate 14 can be reduced, thereby extending the service life of the filter plate 14. At the same time, the rotation of the filter plate 14 can also reduce the frequency of cleaning and maintenance, so that the particles in the flue gas are evenly distributed on the filter plate 14, and the accumulation of particles in a specific area is reduced, thereby reducing the need for cleaning and maintenance.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for utilizing waste heat from tail flue gas of a condensing natural gas boiler, comprising two support plates (1) and a tank body (2) fixedly mounted on the two support plates (1), characterized in that: The support plate (1) is provided with a rotating mechanism and a circulating mechanism; The rotating mechanism comprises an L-shaped support rod (3) fixedly mounted on the left side of the tank body (2); a motor (4) is fixedly mounted on the right side of the L-shaped support rod (3); a rotating shaft (5) is fixedly mounted on the output shaft of the motor (4); a gear (6) is fixedly sleeved on the outer wall of the rotating shaft (5); two supporting assemblies (7) are fixedly mounted in the tank body (2); and metal pipes (8) are rotatably mounted on the two supporting assemblies (7).

2. The device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to claim 1, characterized in that: The left and right sides of the metal tube (8) extend outside the tank body (2) respectively and are rotatably connected to the tank body (2). A large gear (9) is fixedly sleeved on the outer wall of the metal tube (8), and the large gear (9) is meshed with the gear (6).

3. The device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to claim 2, characterized in that: A smoke exhaust pipe (10) is fixedly installed on the left side of the tank body (2), and a smoke exhaust hole (11) is opened on the right side of the smoke exhaust pipe (10). The smoke exhaust hole (11) is communicated with the tank body (2), and a support rod (12) is fixedly installed in the smoke exhaust hole (11). A second rotating shaft (13) is rotatably installed on the support rod (12), and a filter plate (14) is fixedly sleeved on the outer wall of the second rotating shaft (13). Pulleys (15) are fixedly sleeved on the outer walls of the second rotating shaft (13) and the first rotating shaft (5), and belts (16) are wound around the outer walls of the two pulleys (15).

4. The device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to claim 3 is characterized in that: The circulation mechanism comprises a water tank (17) arranged at the bottom of the tank body (2); a water pump (18) is fixedly installed on the right side of the water tank (17); a delivery pipe (19) is fixedly installed on the right side of the water pump (18); the delivery pipe (19) passes through the corresponding support plate (1); a connecting turntable (20) is rotatably installed on the right side of the metal pipe (8); and the water outlet end of the delivery pipe (19) is fixedly connected to the connecting turntable (20).

5. The device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to claim 4, characterized in that: A second connecting rotor (21) is rotatably mounted on the left side of the metal tube (8), a heat exchanger (22) is fixedly mounted on the left side of the second connecting rotor (21), and a heat preservation tube (23) is fixedly mounted on the top of the heat exchanger (22).

6. The device for utilizing waste heat from tail flue gas of a condensing natural gas boiler according to claim 5, characterized in that: A heat dissipation pipe (24) is fixedly installed on the left side of the heat exchanger (22), the heat dissipation pipe (24) passes through the corresponding support plate (1), and the water outlet end of the heat dissipation pipe (24) is fixedly connected to the water tank (17).

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