Energy-saving waste heat recovery device of condenser for boiler

Abstract

The utility model provides an energy-saving waste heat recovery device of a condenser for a boiler, which relates to the technical field of waste heat recovery, and comprises a support seat, a shell, a reversing frame, a heat exchange tube, a heat exchange medium input end collection cover and a heat exchange medium output end collection cover, the driving mechanism drives the rotary plate to rotate in the rotary frame, heat exchange pipes are arranged on the rotary plate, each heat exchange pipe is a taper pipe structure pipe fitting with a large diameter at one end and a small diameter at the other end, and flue gas channels are arranged on the multiple groups of heat exchange pipes; the multiple sets of heat exchange pipes can synchronously rotate along with the rotary plate, so that heat exchange media in the heat exchange pipes can fully and efficiently exchange heat with smoke, and the heat exchange pipes are arranged to be taper pipe structure pipe fittings with the diameter of one end larger than that of the other end smaller than that of the other end. And flue gas which enters the flue gas channel and has a relatively high waste heat temperature can be subjected to efficient heat exchange with a heat exchange medium stored in the large-diameter end of the heat exchange pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to an energy-saving waste heat recovery device for a boiler condenser. Background Art

[0002] A boiler is an energy converter, which is a device that uses the heat released by fuel combustion to heat the heat-conducting medium to certain parameters. During use, the boiler will produce a large amount of high-temperature flue gas, which contains a large amount of heat. The direct emission of high-temperature flue gas will cause serious pollution to the environment. At the same time, the heat in the high-temperature flue gas is directly discharged into the environment, causing a certain degree of resource waste. At present, most boilers usually use boiler condensers to recover the waste heat of the flue gas emitted during the use of the boiler.

[0003] The existing boiler condenser has limited efficiency in recovering waste heat from high-temperature flue gas during use, and part of the heat in the flue gas cannot be effectively recovered. Some devices for assisting condensers in energy-saving waste heat recovery have fixed heat exchange pipes for recovering heat inside, which makes it impossible for the heat exchange medium to fully exchange heat with the flue gas, thereby reducing the waste heat recovery efficiency. Therefore, the utility model proposes an energy-saving waste heat recovery device for a boiler condenser to solve the deficiencies in the prior art. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide an energy-saving waste heat recovery device for a boiler condenser, wherein multiple groups of heat exchange tubes for heat recovery are installed with a rotating plate movably arranged inside a rotating frame, so that the multiple groups of heat exchange tubes can rotate synchronously with the rotating plate, so that the heat exchange medium inside the heat exchange tubes can fully and efficiently exchange heat with the flue gas, wherein the heat exchange tube is arranged as a conical tube structure pipe fitting with a large diameter at one end and a small diameter at the other end, so that the flue gas with a higher waste heat temperature entering the flue gas channel can efficiently exchange heat with the heat exchange medium stored inside the large diameter end of the heat exchange tube, thereby improving the waste heat recovery efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An energy-saving waste heat recovery device for a boiler condenser comprises a support seat, a shell, a rotating frame, a heat exchange tube, a heat exchange medium input end collecting cover and a heat exchange medium output end collecting cover, the bottom of the shell is symmetrically provided with a support seat, the middle of the shell is provided with a rotating frame, a rotating plate is movably provided inside the rotating frame, a driving mechanism is provided on the outer wall of the shell, the driving mechanism drives the rotating plate to rotate in the rotating frame, a heat exchange tube is provided on the rotating plate, the heat exchange tube is a conical tube structure pipe fitting with a large diameter at one end and a small diameter at the other end, a plurality of groups of heat exchange tubes are provided in a circular array around the rotation center of the rotating plate, Multiple groups of heat exchange tubes are provided with flue gas channels, and multiple groups of slow flow plates are staggered inside the flue gas channels. Heat exchange medium input end collection covers are provided inside the shells on one side of multiple groups of heat exchange tubes, and heat exchange medium output end collection covers are provided inside the shells on the other side of multiple groups of heat exchange tubes. One ends of multiple groups of heat exchange tubes are connected to the heat exchange medium input end collection covers through first connecting pipe fittings, and the other ends of multiple groups of heat exchange tubes are connected to the heat exchange medium output end collection covers through second connecting pipe fittings. One end of the shell is provided with an air inlet pipe connected to the flue gas outlet on the condenser body, and the other end of the shell is provided with an air outlet pipe.

[0007] A further improvement is that a heat exchange medium input pipe is provided at the middle of one side of the heat exchange medium input end collecting cover through a sealed bearing, and a heat exchange medium output pipe is provided at the middle of one side of the heat exchange medium output end collecting cover through a sealed bearing.

[0008] A further improvement is that the rotating frame includes a base and a ring body, a base is provided at the bottom of the ring body, the base is installed inside the shell, annular tracks are symmetrically provided at the left and right ends of the ring body, and the rotating plate is movably connected to the annular track.

[0009] A further improvement is that the driving mechanism includes a motor box, a driving motor, a rotating shaft, a driving gear and a gear ring, a motor box is provided on the outer wall of the outer shell, a driving motor is provided inside the motor box, a through groove is provided on the ring body, a driving gear is installed on the outer wall of the ring body at the through groove through a rotating shaft, a gear ring is provided at the middle position of the outer wall of the rotating plate, the gear ring is meshed with the driving gear, and the driving motor drives the rotating shaft to rotate.

[0010] A further improvement is that: the first connecting pipe fitting and the second connecting pipe fitting have the same structure, both comprising a branch pipe, a main pipe and an arc-shaped connecting pipe, the branch pipes are symmetrically arranged in pairs at both ends of the heat exchange pipe, one end of the two symmetrical branch pipes is connected through an arc-shaped connecting pipe, a main pipe is arranged on the arc-shaped connection, the main pipe of the first connecting pipe fitting is connected to the heat exchange medium input end collection cover, and the main pipe of the second connecting pipe fitting is connected to the heat exchange medium output end collection cover.

[0011] A further improvement is that a thermal insulation coating is provided on the outer wall of the shell, the end of the heat exchange tube located on the side of the heat exchange medium input end collection cover is a large diameter end, the end of the heat exchange tube located on the side of the heat exchange medium output end collection cover is a small diameter end, and the diameters of both ends of the flue gas channel are the same.

[0012] The beneficial effects of the utility model are as follows: the energy-saving waste heat recovery device of the utility model is connected with the flue gas outlet on the condenser body through the air inlet pipe, and the flue gas after the heat is recovered by the condenser body enters the energy-saving waste heat recovery device to realize the flue gas waste heat recovery, wherein the multiple groups of heat exchange tubes for heat recovery are installed with the rotating plate movably arranged inside the rotating frame, so that the multiple groups of heat exchange tubes can rotate synchronously with the rotating plate, so that the heat exchange medium inside the heat exchange tube can fully and efficiently exchange heat with the flue gas, wherein the heat exchange tube is set as a conical tube structure pipe fitting with a large diameter at one end and a small diameter at the other end, so that the flue gas with a higher waste heat temperature entering the smoke channel can be efficiently heat exchanged with the heat exchange medium stored inside the large diameter end of the heat exchange tube, thereby improving the waste heat recovery efficiency, and the slow flow plate arranged in the smoke channel can make the smoke flow slowly in the smoke channel so that the waste heat can be fully recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the appearance structure of the utility model;

[0014] Figure 2 It is a three-dimensional schematic diagram of the internal structure of the shell of the utility model;

[0015] Figure 3 This is a three-dimensional schematic diagram of the installation structure of the drive motor of the utility model;

[0016] Figure 4 This is a three-dimensional schematic diagram of the heat exchange tube structure of the utility model;

[0017] Figure 5 This is a three-dimensional schematic diagram of the rotary frame structure of the utility model;

[0018] Figure 6 This is a schematic front view of the installation structure of the slow flow plate of the utility model.

[0019] Wherein: 1. support seat; 2. shell; 3. rotating frame; 301. base; 302. ring body; 303. ring track; 304. through groove; 4. heat exchange tube; 5. heat exchange medium input end collection cover; 6. heat exchange medium output end collection cover; 7. rotating plate; 8. flue gas channel; 9. first connecting pipe fitting; 10. second connecting pipe fitting; 11. condenser body; 12. air inlet pipe; 13. air outlet pipe; 14. heat exchange medium input pipe; 15. heat exchange medium output pipe; 16. motor box; 17. drive motor; 18. rotating shaft; 19. drive gear; 20. gear ring; 21. branch pipe; 22. main pipe; 23. arc connecting pipe; 24. slow flow plate. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0021] according to Figure 1-6 As shown, this embodiment proposes an energy-saving waste heat recovery device for a boiler condenser, including a support seat 1, a shell 2, a rotating frame 3, a heat exchange tube 4, a heat exchange medium input end collection cover 5 and a heat exchange medium output end collection cover 6. The support seat 1 is symmetrically arranged at the bottom of the shell 2, and a rotating frame 3 is arranged in the middle of the shell 2. A rotating plate 7 is movably arranged inside the rotating frame 3. A driving mechanism is arranged on the outer wall of the shell 2. The driving mechanism drives the rotating plate 7 to rotate in the rotating frame 3. A heat exchange tube 4 is arranged on the rotating plate 7. The heat exchange tube 4 is a conical tube structure pipe fitting with a large diameter at one end and a small diameter at the other end. The heat exchange tube 4 is arranged with a plurality of groups of circular arrays around the rotation center of the rotating plate 7. , multiple groups of heat exchange tubes 4 are each provided with a flue gas channel 8, multiple groups of slow flow plates 24 are alternately arranged inside the flue gas channel 8, a heat exchange medium input end collection cover 5 is arranged inside the shell 2 on one side of multiple groups of heat exchange tubes 4, and a heat exchange medium output end collection cover 6 is arranged inside the shell 2 on the other side of multiple groups of heat exchange tubes 4, one end of multiple groups of heat exchange tubes 4 are connected to the heat exchange medium input end collection cover 5 through a first connecting pipe 9, and the other end of multiple groups of heat exchange tubes 4 are connected to the heat exchange medium output end collection cover 6 through a second connecting pipe 10, one end of the shell 2 is provided with an air inlet pipe 12 connected to the flue gas outlet on the condenser body 11, and the other end of the shell 2 is provided with an air outlet pipe 13.

[0022] When the energy-saving waste heat recovery device of the boiler condenser of the utility model recovers the waste heat of the flue gas coming out of the condenser body 11, the flue gas enters the shell 2 through the air inlet pipe 12, and the heat exchange medium enters the heat exchange medium input end collection cover 5 from the heat exchange medium input pipe 14, and then is input into the multiple groups of heat exchange tubes 4 through the first connecting pipe 9. The flue gas can fully exchange heat with the heat exchange medium inside the heat exchange tube 4 from the inside of the flue gas channel 8 and from the outside of the heat exchange tube 4 to achieve waste heat recovery. Then, the heat exchange medium that has recovered the waste heat is discharged from the heat exchange tube 4 from the second connecting pipe 10 for subsequent use. In this process, the rotating plate 7 can be driven to rotate in the rotating frame 3 by the driving mechanism, so that the flue gas inside the shell 2 can flow, and the heat exchange medium in the heat exchange tube 4 can flow, thereby comprehensively improving the waste heat recovery efficiency.

[0023] A heat exchange medium input pipe 14 is provided in the middle of one side of the heat exchange medium input end collecting cover 5 through a sealed bearing, and a heat exchange medium output pipe 15 is provided in the middle of one side of the heat exchange medium output end collecting cover 6 through a sealed bearing.

[0024] The rotating frame 3 includes a base 301 and a ring body 302. The base 301 is provided at the bottom of the ring body 302. The base 301 is installed inside the housing 2. The ring body 302 has circular tracks 303 symmetrically provided at both ends. The rotating plate 7 is movably connected to the circular tracks 303. The driving mechanism includes a motor box 16, a driving motor 17, a rotating shaft 18, a driving gear 19 and a gear ring 20. The outer wall of the housing 2 is provided with a motor box 16. The motor 17 is provided inside the motor box 16. The ring body 302 is provided with a through slot 304. The driving gear 19 is installed on the outer wall of the ring body 302 at the through slot 304 through the rotating shaft 18. The gear ring 20 is provided at the middle of the outer wall of the rotating plate 7. The gear ring 20 is meshed with the driving gear 19. The driving motor 17 drives the rotating shaft 18 to rotate. The driving motor 17 is started to drive the rotating shaft 18 to rotate, and then the driving gear 19 on the rotating shaft 18 drives the rotating plate 7 equipped with the gear ring 20 to rotate on the annular track 303 inside the ring body 302.

[0025] The first connecting pipe fitting 9 and the second connecting pipe fitting 10 have the same structure, and both include a branch pipe 21, a main pipe 22 and an arc-shaped connecting pipe 23. The branch pipes 21 are symmetrically arranged at both ends of the heat exchange tube 4 in pairs, and one end of the two symmetrical branch pipes 21 is connected through an arc-shaped connecting pipe 23. The arc-shaped connection is provided with a main pipe 22. The main pipe 22 of the first connecting pipe fitting 9 is connected to the heat exchange medium input end collection cover 5, and the main pipe 22 of the second connecting pipe fitting 10 is connected to the heat exchange medium output end collection cover 6.

[0026] The outer wall of the shell 2 is provided with a thermal insulation coating, the end of the heat exchange tube 4 located on the side of the heat exchange medium input end collection cover 5 is a large diameter end, the end of the heat exchange tube 4 located on the side of the heat exchange medium output end collection cover 6 is a small diameter end, and the diameters of the two ends of the smoke channel 8 are the same.

[0027] The energy-saving waste heat recovery device of the utility model is connected with the flue gas outlet on the condenser body 11 through the air inlet pipe 12, and the flue gas after the heat is recovered by the condenser body 11 enters the energy-saving waste heat recovery device to realize the waste heat recovery of the flue gas, wherein the multiple groups of heat exchange tubes 4 for heat recovery are installed with the rotating plate 7 movably arranged inside the rotating frame 3, so that the multiple groups of heat exchange tubes 4 can rotate synchronously with the rotating plate 7, so that the heat exchange medium inside the heat exchange tube 4 can fully and efficiently exchange heat with the flue gas, wherein the heat exchange tube 4 is set as a conical tube structure pipe fitting with a large diameter at one end and a small diameter at the other end, so that the flue gas with a higher waste heat temperature entering the flue gas channel 8 can be efficiently heat exchanged with the heat exchange medium stored inside the large diameter end of the heat exchange tube 4, thereby improving the waste heat recovery efficiency, and the slow flow plate 24 arranged in the flue gas channel 8 can make the flue gas fully slow flow in the flue gas channel 8 so that the waste heat can be fully recovered.

[0028] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An energy-saving waste heat recovery device for a boiler condenser, characterized in that: The invention comprises a support seat (1), an outer shell (2), a rotating frame (3), a heat exchange tube (4), a heat exchange medium input end collecting cover (5) and a heat exchange medium output end collecting cover (6), wherein the support seat (1) is symmetrically arranged at the bottom of the outer shell (2), a rotating frame (3) is arranged in the middle of the inner part of the outer shell (2), a rotating plate (7) is movably arranged inside the rotating frame (3), a driving mechanism is arranged on the outer wall of the outer shell (2), the driving mechanism drives the rotating plate (7) to rotate in the rotating frame (3), a heat exchange tube (4) is arranged on the rotating plate (7), the heat exchange tube (4) is a conical tube structure pipe fitting with a large diameter at one end and a small diameter at the other end, a plurality of heat exchange tubes (4) are arranged in a circular array around the rotation center of the rotating plate (7), and the plurality of heat exchange tubes (4) are all provided with a plurality of heat exchange tubes (4) A flue gas passage (8) is provided, wherein a plurality of groups of slow flow plates (24) are staggeredly provided inside the flue gas passage (8), a heat exchange medium input end collecting cover (5) is provided inside the shell (2) on one side of the plurality of groups of heat exchange tubes (4), and a heat exchange medium output end collecting cover (6) is provided inside the shell (2) on the other side of the plurality of groups of heat exchange tubes (4), one end of the plurality of groups of heat exchange tubes (4) are connected to the heat exchange medium input end collecting cover (5) through a first connecting pipe (9), and the other end of the plurality of groups of heat exchange tubes (4) are connected to the heat exchange medium output end collecting cover (6) through a second connecting pipe (10), one end of the shell (2) is provided with an air inlet pipe (12) connected to the flue gas outlet on the condenser body (11), and the other end of the shell (2) is provided with an air outlet pipe (13).

2. The energy-saving waste heat recovery device for a boiler condenser according to claim 1, characterized in that: A heat exchange medium input pipe (14) is provided in the middle of one side of the heat exchange medium input end collecting cover (5) via a sealing bearing, and a heat exchange medium output pipe (15) is provided in the middle of one side of the heat exchange medium output end collecting cover (6) via a sealing bearing.

3. The energy-saving waste heat recovery device for a boiler condenser according to claim 1, characterized in that: The rotating frame (3) comprises a base (301) and a ring body (302); the base (301) is provided at the bottom of the ring body (302); the base (301) is installed inside the housing (2); annular tracks (303) are symmetrically provided at the left and right ends of the ring body (302); and the rotating plate (7) is movably connected to the annular track (303).

4. The energy-saving waste heat recovery device for a boiler condenser according to claim 3 is characterized in that: The driving mechanism comprises a motor box (16), a driving motor (17), a rotating shaft (18), a driving gear (19) and a gear ring (20); the motor box (16) is arranged on the outer wall of the housing (2); the driving motor (17) is arranged inside the motor box (16); a through groove (304) is arranged on the ring body (302); the driving gear (19) is installed on the outer wall of the ring body (302) at the through groove (304) via the rotating shaft (18); a gear ring (20) is arranged at the middle of the outer wall of the rotating plate (7); the gear ring (20) is meshed with the driving gear (19); and the driving motor (17) drives the rotating shaft (18) to rotate.

5. The energy-saving waste heat recovery device for a boiler condenser according to claim 1, characterized in that: The first connecting pipe (9) and the second connecting pipe (10) have the same structure, and both comprise a branch pipe (21), a main pipe (22) and an arc-shaped connecting pipe (23). The branch pipes (21) are symmetrically arranged at both ends of the heat exchange pipe (4) in pairs, and one end of the symmetrical branch pipes (21) is connected to each other through an arc-shaped connecting pipe (23). The arc-shaped connecting pipe is provided with a main pipe (22). The main pipe (22) of the first connecting pipe (9) is connected to a heat exchange medium input end collecting cover (5), and the main pipe (22) of the second connecting pipe (10) is connected to a heat exchange medium output end collecting cover (6).

6. The energy-saving waste heat recovery device for a boiler condenser according to claim 1, characterized in that: The outer wall of the shell (2) is provided with a heat insulation coating, the end of the heat exchange tube (4) located on the side of the heat exchange medium input end collection cover (5) is a large diameter end, the end of the heat exchange tube (4) located on the side of the heat exchange medium output end collection cover (6) is a small diameter end, and the two ends of the smoke channel (8) have the same diameter.

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