Boiler flue gas waste heat recovery system
By bending the waste heat recovery pipeline and heat absorption pipeline, the contact time and area between the flue gas and the heat absorption pipeline is increased, and the problem of low waste heat recovery efficiency of flue gas is solved, achieving efficient waste heat recovery and filtration effects.
Patent Information
- Application Number
- CN202422087474.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In the prior art, the contact time between the flue gas and the heat absorption pipe is short, resulting in low efficiency of flue gas waste heat recovery.
The bent waste heat recovery pipeline and heat absorption pipeline are adopted to increase the contact time and contact area between the flue gas and the heat absorption pipeline, and a filter plate is set up in the bent part to facilitate the cleaning and replacement of the filter plate through the elastic force of the spring.
It improves the efficiency of waste heat recovery of flue gas, and effectively filters impurities through the filter plate to ensure the clean operation of the system.
Smart Images
Figure CN223091094U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of waste heat recovery, and particularly to a waste heat recovery system for boiler flue gas. Background Art
[0002] In industrial production, as an energy conversion device, the flue gas discharged from a boiler contains a large amount of heat energy. If this part of the heat energy is not recovered and utilized, it will not only cause waste of energy, but also cause thermal pollution to the environment. The waste heat recovery technology of boiler flue gas is of great significance for improving energy utilization efficiency, reducing enterprise production costs, and reducing environmental pollution.
[0003] However, in the process of implementing related technical solutions, it is found that there are at least the following technical problems: When recovering waste heat from flue gas, generally, the heat absorption pipes in the box are in contact with the flue gas to recover the waste heat in the flue gas. The speed of the flue gas passing through the box is relatively fast, resulting in a short contact time between the flue gas and the heat absorption pipes, leading to low heat exchange efficiency and low waste heat recovery efficiency. Utility Model Content
[0004] This application provides a waste heat recovery system for boiler flue gas, which solves the problem of low recovery efficiency caused by the short contact time between the flue gas and the heat absorption pipes in the prior art, and realizes the effects of increasing the contact area and contact time between the flue gas and the heat absorption pipes and improving the waste heat recovery efficiency.
[0005] This application provides a waste heat recovery system for boiler flue gas, including a waste heat recovery pipeline. One end of the waste heat recovery pipeline is provided with an intake pipeline, and the other end of the waste heat recovery pipeline is provided with an outlet pipeline. The waste heat recovery pipeline is arranged in a U-shaped bend. A waste heat recovery component is arranged inside the waste heat recovery pipeline. The waste heat recovery component includes: an input pipeline, fixedly arranged on one side of the end of the waste heat recovery pipeline; a heat absorption pipeline, arranged inside the waste heat recovery pipeline, and one end of the heat absorption pipeline is communicated with the input pipeline; an output pipeline, fixedly arranged on the other side of the other end of the waste heat recovery pipeline, and the output pipeline is communicated with the other end of the heat absorption pipeline.
[0006] Further, the heat absorption pipeline is divided into multiple segments, and multiple segments of the heat absorption pipeline are respectively arranged in a U-shaped bend inside the vertical part of the waste heat recovery pipeline. A connecting pipeline is arranged between the two vertical parts of the waste heat recovery pipeline, and two segments of the heat absorption pipeline are communicated with each other through the connecting pipeline.
[0007] Further, a plurality of filter plates are arranged in the middle of the bent part of the waste heat recovery pipeline, and a plurality of removal components for removing the plurality of filter plates are arranged at the top of the waste heat recovery pipeline.
[0008] Further, the multiple extraction components include: a fixed seat fixedly arranged at the top of the waste heat recovery pipeline, and the filter plate is slidably connected inside the fixed seat; a mounting seat arranged at the bottom of the fixed seat; a sealing seat fixedly arranged at the bottom of the mounting seat, and the sealing seat is in contact connection with the top of the filter plate; a plurality of fastening bolts arranged at the top of the mounting seat, and the mounting seat is mounted on the top of the fixed seat through the plurality of fastening bolts.
[0009] Further, limiting grooves are respectively formed on both sides of the inner wall of the fixed seat and the waste heat recovery pipeline, limiting blocks are respectively fixedly arranged on both sides of the filter plate, and the two limiting blocks are slidably connected inside the limiting grooves. The sealing seat matches the inner wall of the fixed seat and the size of the limiting grooves, and sealing gaskets are arranged at the bottom of the mounting seat and the outer side of the sealing seat.
[0010] Further, grooves are respectively formed at the bottom of the inner wall at the bending positions of the waste heat recovery pipeline. The extraction component further includes an elastic component arranged inside the grooves. The elastic component includes: two insertion rods respectively inserted and connected to both sides of the bottom of the groove; a connecting plate fixedly arranged at the top of the insertion rods, and the connecting plate is in contact connection with the filter plate; a spring sleeved on the outer side of the insertion rods, and both ends of the spring are fixedly connected to the inner wall of the groove and the connecting plate respectively.
[0011] The technical solution provided by this application has at least the following technical effects or advantages:
[0012] Through the bent waste heat recovery pipeline, the residence time of the flue gas in the waste heat recovery pipeline can be increased. Cooperating with the bent heat absorption pipeline, the contact time and contact area between the flue gas and the heat absorption pipeline are increased, and the waste heat recovery efficiency is improved. Through the filter screen arranged at the bent part of the waste heat recovery pipeline, impurities in the flue gas are filtered. After the mounting seat is removed, the filter screen is ejected by the elastic force of the spring, which is convenient for cleaning and replacing and repairing the filter screen. Description of the Drawings
[0013] Figure 1 It is a schematic diagram of the overall structure of the waste heat recovery system in the embodiment of this application;
[0014] Figure 2 It is a schematic diagram of the structure of the heat absorption pipeline in the embodiment of this application;
[0015] Figure 3 It is a schematic diagram of the structure of the extraction component in the embodiment of this application;
[0016] In the figure: 10, waste heat recovery pipeline; 20, intake pipeline; 30, outlet pipeline; 40, waste heat recovery component; 50, filter plate; 60, extraction component; 41, input pipeline; 42, heat absorption pipeline; 43, connecting pipeline; 44, output pipeline; 61, fixed seat; 62, limiting block; 63, mounting seat; 64, sealing seat; 65, fastening bolt; 66, elastic component; 661, insertion rod; 662, connecting plate; 663, spring. Specific Embodiment
[0017] The embodiment of the present application discloses a boiler flue gas waste heat recovery system. Through the waste heat recovery pipeline 10 arranged in a bent manner and the heat absorption pipeline 42 arranged in a bent manner, the contact time and contact area between the flue gas and the heat absorption pipeline 42 are increased, thereby improving the waste heat recovery efficiency. The filter plate 50 is bounced up from the fixed seat 61 by the elastic force of the spring 663, which facilitates the cleaning, maintenance and replacement of the filter plate 50.
[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the specification drawings and specific embodiments.
[0019] Please refer to Figure 1 and Figure 2 This embodiment provides a boiler flue gas waste heat recovery system, including a waste heat recovery pipeline 10. One end of the waste heat recovery pipeline 10 is provided with an intake pipeline 20, and the other end of the waste heat recovery pipeline 10 is provided with an outlet pipeline 30. The waste heat recovery pipeline 10 is arranged in a U-shaped bend. A waste heat recovery component 40 is arranged inside the waste heat recovery pipeline 10. The waste heat recovery component 40 includes an input pipeline 41, a heat absorption pipeline 42, a connecting pipeline 43, and an output pipeline 44. The input pipeline 41 is fixedly arranged on one side of the end of the waste heat recovery pipeline 10. The heat absorption pipeline 42 is arranged inside the waste heat recovery pipeline 10. One end of the heat absorption pipeline 42 is communicated with the input pipeline 41. The heat absorption pipeline 42 is divided into multiple sections, and multiple sections of the heat absorption pipeline 42 are respectively arranged in a U-shaped bend inside the vertical part of the waste heat recovery pipeline 10. Multiple connecting pipelines 43 are arranged between the two vertical parts of the waste heat recovery pipeline 10. The two sections of the heat absorption pipeline 42 are communicated with each other through the connecting pipeline 43. The output pipeline 44 is fixedly arranged on the other side of the other end of the waste heat recovery pipeline 10. The output pipeline 44 is communicated with the other end of the heat absorption pipeline 42. Through the waste heat recovery pipeline 10 arranged in a bent manner and the heat absorption pipeline 42 which is communicated through the connecting pipeline 43 and arranged in a bent manner, the flue gas entering the waste heat recovery pipeline 10 can contact the heat absorption pipeline 42 for a longer time and with a larger contact area, thereby improving the efficiency of recovering the waste heat of the flue gas.
[0020] Please refer to Figure 1 and Figure 3, a plurality of filter plates 50 are arranged in the middle of the bent part of the waste heat recovery pipeline 10, and a plurality of extraction components 60 are arranged on the top of the waste heat recovery pipeline 10. The plurality of extraction components 60 include a fixed seat 61, a limit block 62, a mounting seat 63, a sealing seat 64, fastening bolts 65, and an elastic component 66. The fixed seat 61 is fixedly arranged on the top of the waste heat recovery pipeline 10, and the filter plate 50 is slidably connected inside the fixed seat 61. The mounting seat 63 is arranged at the bottom of the fixed seat 61, the sealing seat 64 is fixedly arranged at the bottom of the mounting seat 63, and the sealing seat 64 is in contact connection with the top of the filter plate 50. A plurality of fastening bolts 65 are arranged on the top of the mounting seat 63, and the mounting seat 63 is mounted on the top of the fixed seat 61 through the plurality of fastening bolts 65. Limit grooves are formed on both sides of the inner walls of the fixed seat 61 and the waste heat recovery pipeline 10. Two limit blocks 62 are respectively arranged on both sides of the filter plate 50, and the two limit blocks 62 are slidably connected inside the limit grooves. The sealing seat 64 matches the inner wall of the fixed seat 61 and the size of the limit grooves. Sealing gaskets are arranged at the bottom of the mounting seat 63 and on the outer side of the sealing seat 64. By using the plurality of fastening bolts 65 on the mounting seat 63 to fix the mounting seat 63 on the fixed seat 61, the sealing seat 64 presses against the filter plate 50, and with the limitation of the limit blocks 62 by the limit grooves, the filter plate 50 will not move randomly. Through the matching of the sealing seat 64 with the inner wall of the fixed seat 61 and the sealing gasket, the leakage of the flue gas inside the waste heat recovery pipeline 10 is prevented. By removing the mounting seat 63, the filter plate 50 can be taken out from the waste heat recovery pipeline 10, which is more convenient for cleaning and maintenance of the filter plate 50.
[0021] Please refer to Figure 1 and Figure 3 , grooves are formed at the bottom of the inner walls at the bent positions of the waste heat recovery pipeline 10. The extraction component 60 further includes an elastic component 66. The elastic component 66 is arranged inside the groove. The elastic component 66 includes a plug rod 661, a connecting plate 662, and a spring 663. The two plug rods 661 are respectively inserted and connected to both sides of the bottom of the groove. The connecting plate 662 is fixedly arranged at the top of the plug rod 661. The bottom of the filter plate 50 extends into the groove, and the connecting plate 662 is in contact connection with the filter plate 50. The spring 663 is sleeved on the outer side of the plug rod 661, and both ends of the spring 663 are fixedly connected to the inner wall of the groove and the connecting plate 662 respectively. The spring 663 is in a compressed state inside the groove. When the mounting seat 63 is removed by the elastic force of the spring 663, the elastic force of the mounting seat 63 can drive the filter plate 50 to pop out, so that the filter plate 50 can be conveniently taken out for maintenance and cleaning.
[0022] The functional principle of the present application can be elaborated through the following operation methods:
[0023] During use, the flue gas is introduced into the intake pipe 20 at one end of the waste heat recovery pipe 10, and the liquid is introduced into a section of the heat absorption pipe 42 inside the waste heat recovery pipe 10 from the input pipe 41. The flue gas moves along the U-shaped waste heat recovery pipe 10 and is discharged from the outlet pipe 30. The liquid flows through the connecting pipe 43 in multiple sections of the heat absorption pipe 42 and flows out from the output pipe 44. The flue gas contacts the multiple sections of the heat absorption pipe 42 which are bent inside the waste heat recovery pipe 10. The multiple sections of the bent heat absorption pipe 42 fully absorb the waste heat in the flue gas, increasing the contact area and contact time with the flue gas, thereby improving the absorption efficiency of the waste heat. When the flue gas moves in the bent waste heat recovery pipe 10, it is filtered by multiple filter plates 50 at the bent parts. When it is necessary to replace and clean the filter plates 50, the supply of the flue gas is stopped, and multiple fastening bolts 65 on the top of the mounting seat 63 are unscrewed, so that the mounting seat 63 is separated from the fixed seat 61. The mounting seat 63 and the sealing seat 64 are taken out from the fixed seat 61. The elastic force of the spring 663 in the compressed state in the bottom groove of the filter plate 50 bounces up the filter plate 50, so that the limiting blocks 62 on both sides of the filter plate 50 move upward along the limiting grooves, and the filter plate 50 pops out of the fixed seat 61, and the filter plate 50 can be conveniently taken out for cleaning and maintenance.
[0024] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these changes and modifications.
[0025] The above is only the preferred specific implementation manner of the embodiments of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application, according to the technical solution and its concept of this application, makes equivalent substitutions or changes, and should be covered by the protection scope of this application.
Claims
1. A boiler flue gas waste heat recovery system, comprising a waste heat recovery pipeline (10), one end of the waste heat recovery pipeline (10) is provided with an intake pipeline (20), and the other end of the waste heat recovery pipeline (10) is provided with an outlet pipeline (30), characterized in that, The waste heat recovery pipeline (10) is arranged in a U-shaped bend, and a waste heat recovery component (40) is arranged inside the waste heat recovery pipeline (10). The waste heat recovery component (40) includes: An input pipeline (41), fixedly arranged on one side of the end of the waste heat recovery pipeline (10); A heat absorption pipeline (42), arranged inside the waste heat recovery pipeline (10), and one end of the heat absorption pipeline (42) is communicated with the input pipeline (41); An output pipeline (44), fixedly arranged on the other side of the other end of the waste heat recovery pipeline (10), and the output pipeline (44) is communicated with the other end of the heat absorption pipeline (42).
2. The boiler flue gas waste heat recovery system according to claim 1, wherein, The heat absorption pipeline (42) is divided into multiple sections, and multiple sections of the heat absorption pipeline (42) are respectively arranged in a U-shaped bend inside the vertical part of the waste heat recovery pipeline (10). A connecting pipeline (43) is arranged between the two vertical parts of the waste heat recovery pipeline (10), and two sections of the heat absorption pipeline (42) are communicated with each other through the connecting pipeline (43).
3. A boiler flue gas waste heat recovery system according to claim 1, characterized in that, A plurality of filter plates (50) are arranged in the middle of the bending part of the waste heat recovery pipeline (10), and a plurality of extraction components (60) for extracting the plurality of filter plates (50) are arranged on the top of the waste heat recovery pipeline (10).
4. The boiler flue gas waste heat recovery system according to claim 3, wherein, The plurality of extraction components (60) include: A fixed seat (61), fixedly arranged on the top of the waste heat recovery pipeline (10), and the filter plate (50) is slidably connected inside the fixed seat (61); An installation seat (63), arranged at the bottom of the fixed seat (61); A sealing seat (64), fixedly arranged at the bottom of the installation seat (63), and the sealing seat (64) is in contact connection with the top of the filter plate (50); A plurality of fastening bolts (65), arranged on the top of the installation seat (63), and the installation seat (63) is installed on the top of the fixed seat (61) through the plurality of fastening bolts (65).
5. The boiler flue gas waste heat recovery system according to claim 4, characterized in that, Limiting grooves are opened on both sides of the inner wall of the fixed seat (61) and the waste heat recovery pipeline (10). Limiting blocks (62) are fixedly arranged on both sides of the filter plate (50), and the two limiting blocks (62) are slidably connected inside the limiting grooves. The sealing seat (64) matches the inner wall of the fixed seat (61) and the size of the limiting grooves, and sealing gaskets are arranged on the bottom of the installation seat (63) and the outside of the sealing seat (64).
6. The boiler flue gas waste heat recovery system according to claim 3, characterized in that, Grooves are opened at the bottom of the inner wall of the bending position of the waste heat recovery pipeline (10). The extraction component (60) further includes an elastic component (66). The elastic component (66) is arranged inside the groove. The elastic component (66) includes: Two insertion rods (661), respectively inserted and connected to both sides of the bottom of the groove; A connecting plate (662), fixedly arranged on the top of the insertion rod (661), and the connecting plate (662) is in contact connection with the filter plate (50); A spring (663) is sleeved outside the insertion rod (661), and two ends of the spring (663) are fixedly connected to the inner wall of the groove and the connecting plate (662) respectively.