Flue gas backflow device of heat exchanger
By setting temperature sensors and return valves in the outlet pipe of the heat exchanger, the smoke is returned and the servo motor and air pump are used to clean the smoke and dust, the smoke and dust in the existing heat exchanger has been solved. The smoke and dust cannot effectively cool down and the accumulation of smoke and dust lead to heat exchange. The problem of poor results improves heat exchange efficiency and equipment operation stability.
Patent Information
- Application Number
- CN202411872111.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-02-21
AI Technical Summary
After the existing heat exchanger has heat exchanged with hot smoke and cold water, the smoke fails to cool down effectively, resulting in waste of heat and accumulation of smoke and dust, resulting in poor heat exchange effect.
A flue gas return device was designed, and the flue gas return was realized by setting a temperature sensor in the outlet pipeline to detect the flue gas temperature and opening and closing the valve according to the temperature; at the same time, a servo motor is used to drive the rotating plate-fin hollow plate to remove surface dust and dirt , and regularly clean the internal dirt through the air pump.
It effectively avoids heat waste, improves the heat exchange effect of the heat exchanger, and maintains the efficient operation of the heat exchanger by cleaning up smoke and dust.
Smart Images
Figure CN119492281A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of heat exchangers, in particular to a flue gas reflow device of a heat exchanger. Background Art
[0002] Heat exchanger is an energy-saving device that realizes heat transfer between two or more fluids at different temperatures. It transfers heat from a higher temperature fluid to a lower temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization. The heat exchanger industry involves nearly 30 industries such as HVAC, pressure vessels, reclaimed water treatment equipment, chemicals, petroleum, etc., forming an industrial chain.
[0003] At present, after the heat exchanger exchanges heat between hot smoke and cold water, a lot of smoke is discharged from the heat exchanger without being effectively cooled, resulting in a waste of heat in the smoke. In addition, as time goes by, smoke often accumulates inside the heat exchanger. As the smoke gradually increases, the dust isolates the hot air, resulting in poor heat exchange effect inside the heat exchanger. Summary of the invention
[0004] In view of the problem that the existing heat exchanger has poor heat exchange effect, the present invention provides a flue gas reflow device of the heat exchanger which can enhance the heat exchange effect, thereby solving the defects and shortcomings in the prior art.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a smoke reflow device of a heat exchanger, comprising a heat exchanger shell, one end of the heat exchanger shell is fixedly connected to an air inlet pipe, the other end of the heat exchanger shell is fixedly connected to an outlet pipe, a temperature sensor is arranged inside the outlet pipe, and a smoke reflow assembly is arranged between the outlet pipe and the heat exchanger shell; the smoke reflow assembly comprises a smoke reflow main pipe fixedly connected to the outlet pipe, a plurality of smoke reflow branch pipes are fixedly connected to the outer surface of the smoke reflow main pipe, the bottom ends of the plurality of smoke reflow branch pipes are fixedly connected to the top of the heat exchanger shell, and the outer surfaces of the plurality of smoke reflow branch pipes are provided with reflow valves.
[0006] Preferably, two groups of knocking components are arranged inside the heat exchanger shell; the knocking component includes a mounting connecting shaft fixedly connected to the inner wall of the heat exchanger shell, the outer surface of the mounting connecting shaft is fixedly connected to a fixed mounting plate, the fixed mounting plate is arranged between two plate-fin type hollow plates, and elastic components are arranged on both sides of the fixed mounting plate.
[0007] Preferably, the elastic component includes a telescopic rod fixedly connected to the side wall of the fixed mounting plate, the free end of the telescopic rod is fixedly connected to an elastic protrusion, the outer surface of the telescopic rod is sleeved with a return spring, one end of the return spring is fixedly connected to the side wall of the fixed mounting plate, and the other end of the return spring is fixedly connected to the side wall of the elastic protrusion.
[0008] Preferably, a dust suction assembly is connected to the bottom of the heat exchanger shell; the dust suction assembly includes a plurality of waste discharge branch pipes fixedly connected to the bottom of the heat exchanger shell, the plurality of waste discharge branch pipes are commonly fixedly connected to a waste discharge box, the side wall of the waste discharge box is slidably connected to a collection drawer, a filter net is embedded on the lower surface of the collection drawer, and the bottom of the waste discharge box is connected to an air suction assembly.
[0009] Preferably, the air suction assembly comprises an air suction connecting pipe fixedly connected to the bottom of the waste discharge box, one end of the air suction connecting pipe away from the waste discharge box is fixedly connected to an air suction pump, and the outlet of the air suction pump is connected to a discharge pipe.
[0010] Preferably, a plurality of plate-fin type hollow plates are staggeredly arranged inside the heat exchanger shell, one end of each of the plurality of plate-fin type hollow plates is fixedly connected to a first rotating pipe, the first rotating pipe passes through the heat exchanger shell and is connected to rotation, the ends of the plurality of first rotating pipes are commonly connected to a drainage main pipe, a side of the drainage main pipe away from the first rotating pipe is fixedly connected to a drainage connecting pipe, the other ends of the plurality of plate-fin type hollow plates are fixedly connected to a second rotating pipe, the second rotating pipe passes through the heat exchanger shell and is connected to rotation, the plurality of second rotating pipes are commonly connected to a water supply assembly, and a power assembly for driving the second rotating pipe to rotate is installed on the top of the heat exchanger shell.
[0011] Preferably, the water supply assembly includes a water pump, the inlet of the water pump is fixedly connected to a water pumping pipe, the outlet of the water pump is fixedly connected to a water inlet connecting pipe, the end of the water inlet connecting pipe away from the water pump is fixedly connected to a water inlet main pipe, and the plurality of second rotating pipes are all fixedly connected to the water inlet main pipe.
[0012] Preferably, the power assembly includes a servo motor fixedly connected to the top of the heat exchanger shell, the output shaft of the servo motor is fixedly connected to a first sprocket, the outer surfaces of the plurality of second rotating pipes are fixedly connected to second sprockets, and the first sprocket and the plurality of second sprockets are connected via a chain belt transmission.
[0013] The present invention has the following beneficial effects: The present invention arranges a temperature sensor in the outlet pipe of the heat exchanger, and detects the specific temperature of the flue gas passing through the outlet pipe through the temperature sensor. When the flue gas temperature is too high, the valve on the outlet pipe is closed, and according to the detected specific temperature, the reflux valve on the corresponding flue gas reflux branch pipe is opened, so that the flue gas refluxes to the inside of the heat exchanger shell to continue to be used, thereby avoiding heat waste and improving the heat exchange effect of the heat exchanger.
[0014] The servo motor is started, and the output shaft of the servo motor rotates back and forth in a small range through the chain belt with multiple second rotating pipes, so that the multiple plate-fin type hollow plates rotate continuously. When rotating, the plate-fin type hollow plates will continuously collide with the elastic protrusions, so that the dust on the surface of the plate-fin type hollow plates will continuously fall off, thereby avoiding the accumulation of smoke and dust.
[0015] Start the vacuum pump regularly to suck the dust and dirt inside the heat exchanger shell into the waste box, intercept it through the collection drawer, and regularly pull out the collection drawer for cleaning, which effectively ensures the efficient heat exchange of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle; Figure 3 It is a top view of the structure of the present invention; Figure 4 It is a front view of the structure of the present invention; Figure 5 It is a schematic diagram of the internal structure of the present invention; Figure 6 For the present invention Figure 2 A local enlarged schematic diagram of point A in FIG. Figure 7 It is a schematic diagram of the elastic protrusion structure of the present invention.
[0017] Among them, 1. heat exchanger shell; 2. air inlet pipe; 3. outlet pipe; 4. plate-fin hollow plate; 5. first rotating pipe; 6. drainage main pipe; 7. drainage connecting pipe; 8. second rotating pipe; 9. water inlet main pipe; 10. water inlet connecting pipe; 11. water pump; 12. servo motor; 13. flue gas reflux main pipe; 14. flue gas reflux branch pipe; 15. reflux valve; 16. waste discharge branch pipe; 17. waste discharge box; 18. collection drawer; 19. exhaust connecting pipe; 20. exhaust pump; 21. installation connecting shaft; 22. fixed installation plate; 23. telescopic rod; 24. reset spring; 25. elastic bump. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] like Figure 1-7 As shown, an embodiment of the present invention provides a flue gas reflow device for a heat exchanger, comprising a heat exchanger shell 1, one end of the heat exchanger shell 1 is fixedly connected to an air inlet pipe 2, the other end of the heat exchanger shell 1 is fixedly connected to an outlet pipe 3, and a temperature sensor is arranged inside the outlet pipe 3.
[0020] A flue gas reflux assembly is arranged between the outlet pipe 3 and the heat exchanger shell 1, and the flue gas reflux assembly includes a flue gas reflux main pipe 13 fixedly connected to the outlet pipe 3, and a plurality of flue gas reflux branch pipes 14 are fixedly connected to the outer surface of the flue gas reflux main pipe 13, and the bottom ends of the plurality of flue gas reflux branch pipes 14 are fixedly connected to the top of the heat exchanger shell 1, and the outer surfaces of the plurality of flue gas reflux branch pipes 14 are provided with reflux valves 15.
[0021] Two sets of knocking components are arranged inside the heat exchanger housing 1. The knocking components include a mounting connecting shaft 21 fixedly connected to the inner wall of the heat exchanger housing 1, a fixed mounting plate 22 is fixedly connected to the outer surface of the mounting connecting shaft 21, the fixed mounting plate 22 is arranged between the two plate-fin type hollow plates 4, and elastic components are arranged on both sides of the fixed mounting plate 22.
[0022] The elastic component includes a telescopic rod 23 fixedly connected to the side wall of the fixed mounting plate 22, the free end of the telescopic rod 23 is fixedly connected to an elastic protrusion 25, and the outer surface of the telescopic rod 23 is sleeved with a reset spring 24, one end of the reset spring 24 is fixedly connected to the side wall of the fixed mounting plate 22, and the other end of the reset spring 24 is fixedly connected to the side wall of the elastic protrusion 25. The servo motor 12 is started, and the output shaft of the servo motor 12 rotates back and forth in a small range with multiple second rotating pipes 8 through a chain belt, so that the multiple plate-fin type hollow plates 4 rotate continuously. When rotating, the plate-fin type hollow plates 4 will continuously collide with the elastic protrusion 25, so that the dirt on the surface of the plate-fin type hollow plates 4 will continuously fall off.
[0023] A dust collection assembly is connected to the bottom of the heat exchanger housing 1. The dust collection assembly includes a plurality of waste discharge branch pipes 16 fixedly connected to the bottom of the heat exchanger housing 1, valves are provided on the air inlet pipe 2, the outlet pipe 3 and the waste discharge branch pipes 16, the plurality of waste discharge branch pipes 16 are fixedly connected to a waste discharge box 17, a collection drawer 18 is slidably connected to the side wall of the waste discharge box 17, a filter screen is embedded in the lower surface of the collection drawer 18, and an air suction assembly is connected to the bottom of the waste discharge box 17.
[0024] The air suction assembly includes an air suction connection pipe 19 fixedly connected to the bottom of the waste discharge box 17, and an end of the air suction connection pipe 19 away from the waste discharge box 17 is fixedly connected to an air suction pump 20, and the outlet of the air suction pump 20 is connected to a discharge pipe.
[0025] A plurality of plate-fin hollow plates 4 are staggeredly arranged inside the heat exchanger shell 1. One end of each of the plurality of plate-fin hollow plates 4 is fixedly connected to a first rotating pipe 5, which penetrates the heat exchanger shell 1 and is connected to rotation. The ends of the plurality of first rotating pipes 5 are commonly connected to a drainage main pipe 6, and a drainage connecting pipe 7 is fixedly connected to the side of the drainage main pipe 6 away from the first rotating pipe 5. The other ends of the plurality of plate-fin hollow plates 4 are fixedly connected to a second rotating pipe 8, which penetrates the heat exchanger shell 1 and is connected to rotation. The plurality of second rotating pipes 8 are commonly connected to a water supply assembly, which includes a water pump 11, the inlet of the water pump 11 is fixedly connected to a water pump pipe, the outlet of the water pump 11 is fixedly connected to a water inlet connecting pipe 10, and the end of the water inlet connecting pipe 10 away from the water pump 11 is fixedly connected to a water inlet main pipe 9, and the plurality of second rotating pipes 8 are fixedly connected to the water inlet main pipe 9. The embodiment shown in the figure includes four plate-fin hollow plates 4, four first rotating pipes 5, and four second rotating pipes 8.
[0026] A power assembly for driving the second rotating pipe 8 to rotate is installed on the top of the heat exchanger shell 1. The power assembly includes a servo motor 12 fixedly connected to the top of the heat exchanger shell 1. The output shaft of the servo motor 12 is fixedly connected to a first sprocket. The outer surfaces of multiple second rotating pipes 8 are fixedly connected to second sprockets. The first sprocket and the multiple second sprockets are connected through a chain belt transmission.
[0027] Working principle: The flue gas enters the interior of the heat exchanger shell 1 through the air intake pipe 2. At the same time, the water pump 11 is started. The water pump 11 pumps cold water into the water inlet main pipe 9 through the water inlet connecting pipe 10, and then enters the multiple plate-fin hollow plates 4 through multiple second rotating pipes 8. The hot flue gas continuously contacts the plate-fin hollow plates 4, thereby heating the water inside the plate-fin hollow plates 4. The heated water is discharged into the drainage main pipe 6 through multiple first rotating pipes 5, and finally discharged through the drainage connecting pipe 7.
[0028] When heat exchange is performed, the servo motor 12 is started, and the output shaft of the servo motor 12 rotates back and forth in a small range through the chain belt with multiple second rotating pipes 8, so that multiple plate-fin hollow plates 4 rotate continuously. When rotating, the plate-fin hollow plates 4 will continuously collide with the elastic protrusions 25, so that the dirt on the surface of the plate-fin hollow plates 4 continuously falls off to avoid the accumulation of smoke and dust. The vacuum pump 20 is started regularly, and the dust inside the heat exchanger housing 1 is sucked into the waste box 17 through the action of the vacuum pump 20, and is intercepted by the collection drawer 18, and the collection drawer 18 can be regularly drawn out for cleaning.
[0029] The temperature sensor inside the outlet pipe 3 detects the specific temperature of the flue gas passing through the outlet pipe 3. When the temperature sensor detects that the temperature of the flue gas passing through the outlet pipe 3 is too high, the valve on the outlet pipe 3 is closed, and the reflux valve 15 on the corresponding flue gas reflux branch pipe 14 is opened according to the detected specific temperature, so that the flue gas flows back to the inside of the heat exchanger shell 1 to continue to be used, thereby avoiding heat waste and improving the heat exchange effect of the heat exchanger.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A flue gas reflow device for a heat exchanger, comprising a heat exchanger housing (1), characterized in that: One end of the heat exchanger shell (1) is fixedly connected to an air inlet pipe (2), and the other end of the heat exchanger shell (1) is fixedly connected to an outlet pipe (3), a temperature sensor is arranged inside the outlet pipe (3), and a flue gas reflow component is arranged between the outlet pipe (3) and the heat exchanger shell (1); The smoke return assembly comprises a smoke return main pipe (13) fixedly connected to the outlet pipe (3); a plurality of smoke return branch pipes (14) are fixedly connected to the outer surface of the smoke return main pipe (13); the bottom ends of the plurality of smoke return branch pipes (14) are fixedly connected to the top of the heat exchanger shell (1); and a return valve (15) is provided on the plurality of smoke return branch pipes (14).
2. The flue gas reflow device of the heat exchanger according to claim 1, characterized in that: Two sets of knocking components are arranged inside the heat exchanger shell (1); The knocking assembly comprises a mounting connection shaft (21) fixedly connected to the inner wall of the heat exchanger shell (1), the outer surface of the mounting connection shaft (21) being fixedly connected to a fixed mounting plate (22), the fixed mounting plate (22) being arranged between two plate-fin type hollow plates (4), and elastic components being arranged on both sides of the fixed mounting plate (22).
3. The flue gas reflow device of the heat exchanger according to claim 2, characterized in that: The elastic component comprises a telescopic rod (23) fixedly connected to a side wall of a fixed mounting plate (22); a free end of the telescopic rod (23) is fixedly connected to an elastic protrusion (25); a return spring (24) is sleeved on the outer surface of the telescopic rod (23); one end of the return spring (24) is fixedly connected to the side wall of the fixed mounting plate (22); and the other end of the return spring (24) is fixedly connected to the side wall of the elastic protrusion (25).
4. The flue gas reflow device of the heat exchanger according to claim 1, characterized in that: The bottom of the heat exchanger housing (1) is connected to a dust collection assembly; The dust collection component comprises a plurality of waste discharge branch pipes (16) fixedly connected to the bottom of the heat exchanger shell (1), the plurality of waste discharge branch pipes (16) being commonly fixedly connected to a waste discharge box (17), a collecting drawer (18) being slidably connected to the side wall of the waste discharge box (17), a filter screen being embedded in the lower surface of the collecting drawer (18), and an air suction component being connected to the bottom of the waste discharge box (17).
5. The flue gas reflow device of the heat exchanger according to claim 4, characterized in that: The air suction assembly comprises an air suction connection pipe (19) fixedly connected to the bottom of the waste discharge box (17), one end of the air suction connection pipe (19) away from the waste discharge box (17) is fixedly connected to an air suction pump (20), and the outlet of the air suction pump (20) is connected to a discharge pipe.
6. The flue gas reflow device of the heat exchanger according to claim 1, characterized in that: A plurality of plate-fin type hollow plates (4) are staggeredly arranged inside the heat exchanger shell (1), one end of each of the plurality of plate-fin type hollow plates (4) is fixedly connected to a first rotating pipe (5), the first rotating pipe (5) passes through the heat exchanger shell (1) and is connected to the rotation, the ends of each of the plurality of first rotating pipes (5) are commonly connected to a drainage main pipe (6), the side of the drainage main pipe (6) away from the first rotating pipe (5) is fixedly connected to a drainage connecting pipe (7), the other ends of each of the plurality of plate-fin type hollow plates (4) are fixedly connected to a second rotating pipe (8), the second rotating pipe (8) passes through the heat exchanger shell (1) and is connected to the rotation, the plurality of second rotating pipes (8) are commonly connected to a water supply component, and a power component for driving the second rotating pipe (8) to rotate is installed on the top of the heat exchanger shell (1).
7. The flue gas reflow device of the heat exchanger according to claim 6, characterized in that: The water supply assembly comprises a water pump (11), the inlet of the water pump (11) is fixedly connected to a water pump pipe, the outlet of the water pump (11) is fixedly connected to a water inlet connecting pipe (10), one end of the water inlet connecting pipe (10) away from the water pump (11) is fixedly connected to a water inlet main pipe (9), and the plurality of second rotating pipes (8) are all fixedly connected to the water inlet main pipe (9).
8. The flue gas reflow device of the heat exchanger according to claim 6, characterized in that: The power assembly comprises a servo motor (12) fixedly connected to the top of the heat exchanger housing (1), the output shaft of the servo motor (12) being fixedly connected to a first sprocket, the outer surfaces of the plurality of second rotating pipes (8) being fixedly connected to second sprockets, and the first sprocket and the plurality of second sprockets being connected via a chain belt transmission.