Flue gas waste heat recovery device

Abstract

According to the flue gas waste heat recovery device, a support is fixedly arranged in a flue gas heat exchange pipe, a dust suction pipe is rotationally arranged on the support, a plurality of dust suction holes are formed in the dust suction pipe, a plurality of cleaning rods are symmetrically arranged on the peripheral side of the dust suction pipe, and brushes making contact with the inner wall of the flue gas heat exchange pipe are arranged on the cleaning rods. The motor and the dust collection equipment are started at the same time, the motor drives the driving disc to rotate, then the dust collection pipe can rotate, at the moment, the brushes on the cleaning rods continuously clean the inner wall of the flue gas heat exchange pipe, the dust collection holes in the dust collection pipe begin to suck dust and other impurities generated in the cleaning process, and the dust is prevented from being accumulated on the pipe wall to affect the heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery and reuse technology, specifically a flue gas waste heat recovery device. Background Technology

[0002] Currently, the flue gas produced after the combustion of conventional fuels (including coal, oil, and natural gas) is relatively high in temperature, containing a considerable amount of heat energy, especially flue gas containing high-enthalpy water vapor. If this high-temperature flue gas is directly discharged into the atmosphere through a chimney without treatment, it will result in a huge waste of heat energy.

[0003] When existing flue gas waste heat recovery devices are in use, the flue gas is transported in the flue for a long time, which will cause too many impurities to adhere to the inner wall of the flue. If it is not cleaned in time, it will reduce the heat exchange efficiency of the flue. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a flue gas waste heat recovery device.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flue gas waste heat recovery device, comprising a flue gas heat exchange tube and an outer shell, wherein the outer shell is fixed on the outer wall of the flue gas heat exchange tube, and a cavity is formed between the inner wall of the outer shell and the outer wall of the flue gas heat exchange tube, wherein an inlet pipe and an outlet pipe are symmetrically arranged on the outer shell, a support is fixedly arranged inside the flue gas heat exchange tube, a dust suction pipe is rotatably arranged on the support, the dust suction pipe is provided with multiple dust suction holes, and multiple cleaning rods are symmetrically arranged around the periphery of the dust suction pipe, wherein the cleaning rods are provided with brushes that contact the inner wall of the flue gas heat exchange tube;

[0008] The rear end of the flue gas heat exchange tube is provided with a slot and a motor. The rear end of the dust suction tube is provided with a toothed disc located inside the slot. The toothed disc can rotate inside the slot and has multiple through holes. The output end of the motor is provided with a drive disc that meshes with the toothed disc.

[0009] The flue gas heat exchange tube is also provided with a transition block that is rotatably connected to the dust collection pipe. The transition block is connected to the dust collection pipe. The lower end of the transition block is provided with a transition pipe that passes through the flue gas heat exchange tube. A dust collection device is provided below the flue gas heat exchange tube. The dust collection end of the dust collection device is connected to the transition pipe.

[0010] To improve the stability of the suction pipe during use, the present invention includes the following improvement: two supports are symmetrically arranged inside the flue gas heat exchange pipe, and both ends of the suction pipe are rotatably connected to the supports.

[0011] To facilitate the assembly of the drive disc, the present invention is improved by providing a rotating shaft at the output end of the motor, and fixing the drive disc to one end of the rotating shaft with screws.

[0012] Furthermore, an improvement of this utility model is that both the adapter block and the adapter pipe are made of metal tubing.

[0013] Furthermore, an improvement of this utility model is that the motor is a servo motor.

[0014] Furthermore, an improvement of this utility model is that the vacuuming device adopts an industrial vacuum cleaner.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a flue gas waste heat recovery device, which has the following features:

[0017] Beneficial effects:

[0018] The cavity structure formed by the flue gas heat exchange tube and the outer shell can effectively exchange heat, fully recover the waste heat in the flue gas, improve energy utilization, and can be applied to a variety of industrial scenarios that require waste heat recovery, such as boiler flue gas treatment in factories, thereby reducing energy consumption costs.

[0019] The design of the suction pipe and its surrounding cleaning rods and brushes can automatically clean the inner wall of the flue gas heat exchange tube during the suction process, preventing dust from forming a dirt layer on the tube wall and reducing heat exchange efficiency. Compared with traditional periodic manual cleaning, it reduces labor maintenance costs and equipment downtime, and ensures long-term stable and efficient operation of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is the front view of the present invention, Soil 1;

[0022] Figure 3 This is a cross-sectional view of the flue gas heat exchange tube in this utility model;

[0023] In the diagram: 1. Flue gas heat exchange tube; 2. Outer shell; 3. Water inlet pipe; 4. Water outlet pipe; 5. Empty trough; 6. Support; 7. Dust suction pipe; 8. Gear disc; 9. Through hole; 10. Motor; 11. Drive disc; 12. Adapter block; 13. Adapter pipe; 14. Dust suction hole; 15. Cleaning rod; 16. Brush; 17. Dust collection equipment. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-3 This utility model discloses a flue gas waste heat recovery device, including a flue gas heat exchange tube 1 and an outer shell 2. The outer shell 2 is fixed on the outer wall of the flue gas heat exchange tube 1, and a cavity is formed between the inner wall of the outer shell 2 and the outer wall of the flue gas heat exchange tube 1. A water inlet pipe 3 and a water outlet pipe 4 are symmetrically arranged on the outer shell 2. A support 6 is fixedly arranged inside the flue gas heat exchange tube 1. A dust suction pipe 7 is rotatably arranged on the support 6. The dust suction pipe 7 is provided with a plurality of dust suction holes 14, and a plurality of cleaning rods 15 are symmetrically arranged on the periphery of the dust suction pipe 7. The cleaning rods 15 are provided with brushes 16 that contact the inner wall of the flue gas heat exchange tube 1.

[0026] The rear end of the flue gas heat exchange tube 1 is provided with a slot 5 and a motor 10. The rear end of the dust suction tube 7 is provided with a toothed disc 8 located inside the slot 5. The toothed disc 8 can rotate inside the slot 5, and the toothed disc 8 is provided with multiple through holes 9. The output end of the motor 10 is provided with a drive disc 11 that meshes with the toothed disc 8.

[0027] The flue gas heat exchange tube 1 is also provided with a transition block 12 that is rotatably connected to the dust suction pipe 7, and the transition block 12 is connected to the dust suction pipe 7. The lower end of the transition block 12 is provided with a transition pipe 13 that passes through the flue gas heat exchange tube 1. A dust suction device 17 is provided below the flue gas heat exchange tube 1, and the dust suction end of the dust suction device 17 is connected to the transition pipe 13.

[0028] In this embodiment, two supports 6 are symmetrically arranged inside the flue gas heat exchange tube 1, and the two ends of the dust suction tube 7 are rotatably connected to the supports 6 respectively, which can provide a support structure for the two ends of the dust suction tube 7 and improve the stability of the dust suction tube 7 during use.

[0029] In this embodiment, the output end of the motor 10 is provided with a rotating shaft, and the drive disk 11 is fixed to one end of the rotating shaft by screws. The screw fixing method makes it easy to assemble the drive disk 11 at one end of the rotating shaft.

[0030] In this embodiment, both the adapter block 12 and the adapter pipe 13 are made of metal pipes. The adapter block 12 has an internal cavity, and one end of the suction pipe 7 can be inserted into the cavity. The rotatable connection between the suction pipe 7 and the adapter block 12 can be achieved by adding parts such as shaft seals or sealed bearings. Here, its conventional connection structure does not need to be described in detail.

[0031] In this embodiment, the motor 10 can be a servo motor, and the vacuuming device 17 can be an industrial vacuum cleaner.

[0032] When the flue gas containing residual heat enters the flue gas heat exchange tube 1, the motor 10 and the dust collection device 17 are both in the off state. The cavity formed between the inner wall of the outer shell 2 and the outer wall of the flue gas heat exchange tube 1 is filled with acetic acid or other media. The heat generated by the high-temperature flue gas will be transferred to the outer wall of the flue gas heat exchange tube 1. At this time, the heat on the outer wall of the flue gas heat exchange tube 1 will be transferred to the medium in the cavity, thereby playing a heat exchange role and recovering the residual heat in the flue gas. In this structure, the diameter and length of the flue gas heat exchange tube 1 are not strictly specified. Finally, the flue gas after heat exchange is discharged to the designated position at the rear end of the flue gas heat exchange tube 1.

[0033] After the flue gas heat exchange tube 1 has been in use for a period of time, the flue gas delivery is stopped, and the motor 10 and the dust collection device 17 are started at the same time. The motor 10 drives the drive disc 11 to rotate, which in turn enables the dust collection tube 7 to rotate. At this time, the brush 16 on the cleaning rod 15 continuously cleans the inner wall of the flue gas heat exchange tube 1, and the dust collection hole 14 on the dust collection tube 7 begins to suck up the dust and other impurities generated during the cleaning process to prevent dust from accumulating on the tube wall and affecting the heat exchange efficiency.

[0034] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely 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 process, method, article, or apparatus.

[0035] 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.

Claims

1. A flue gas waste heat recovery device, comprising a flue gas heat exchange pipe (1) and an outer shell (2), the outer shell (2) is fixed on the outer wall of the flue gas heat exchange pipe (1), the inner wall of the outer shell (2) and the outer wall of the flue gas heat exchange pipe (1) form a cavity, the outer shell (2) is symmetrically provided with a water inlet pipe (3) and a water outlet pipe (4), characterized in that: The inside of the flue gas heat exchange pipe (1) is fixedly provided with a support (6), the support (6) is rotatably provided with a dust suction pipe (7), the dust suction pipe (7) is provided with a plurality of dust suction holes (14), and the periphery of the dust suction pipe (7) is symmetrically provided with a plurality of cleaning rods (15), the cleaning rods (15) are provided with brushes (16) which contact the inner wall of the flue gas heat exchange pipe (1); The rear end of the flue gas heat exchange pipe (1) is provided with a hollow groove (5) and a motor (10), the rear end of the dust suction pipe (7) is provided with a gear disc (8) which is located in the hollow groove (5), the gear disc (8) can rotate in the hollow groove (5), the gear disc (8) is provided with a plurality of through holes (9), and the output end of the motor (10) is provided with a driving disc (11) which is engaged with the gear disc (8). The inside of the flue gas heat exchange pipe (1) is also provided with a switching block (12) which is rotatably connected with the dust suction pipe (7), the switching block (12) is communicated with the dust suction pipe (7), the lower end of the switching block (12) is provided with a switching pipe (13) which penetrates the flue gas heat exchange pipe (1), the lower part of the flue gas heat exchange pipe (1) is provided with a dust suction device (17), and the dust suction end of the dust suction device (17) is communicated with the switching pipe (13).

2. A flue gas waste heat recovery device according to claim 1, characterised in that: The inside of the flue gas heat exchange pipe (1) is symmetrically provided with two supports (6), and the two ends of the dust suction pipe (7) are rotatably connected with the supports (6) respectively.

3. A flue gas heat recovery device according to claim 2, characterised in that: The output end of the motor (10) is provided with a rotating shaft, and the driving disc (11) is fixed on one end of the rotating shaft through screws.

4. A flue gas heat recovery device according to claim 3, characterised in that: The switching block (12) and the switching pipe (13) are both metal pipes.

5. A flue gas heat recovery device according to claim 4, characterised in that: The motor (10) is a servo motor.

6. A flue gas heat recovery device according to claim 5, characterised in that: The dust suction device (17) is an industrial dust collector.

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