A sintering off-gas treatment device

Abstract

This disclosure relates to the field of industrial flue gas treatment technology. A sintering flue gas treatment device disclosed herein includes a base, a treatment box mounted on the top of the base, and connecting pipes one and two fixedly connected to the left and right sides of the bottom of the treatment box, respectively. A burner, heat exchange ceramic one, and heat exchange ceramic two are installed inside the treatment box; a switching valve is also installed on the top of the base. This device pumps the heat exchange liquid from the heat exchange box cavity into connecting pipe two via a pump and an inlet pipe. The liquid then flows back to the heat exchange box sequentially along the upper side of the sealing groove cavity, connecting pipe one, the lower side of the sealing groove cavity, connecting pipe three, return pipe, return cylinder, and return groove, forming a circulating flow of the heat exchange liquid. This design significantly reduces the temperature rise of the sealing gasket due to working heat by circulating heat exchange liquid inside the sealing gasket, effectively delaying the heat aging and failure of the sealing gasket.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of industrial flue gas treatment technology, and more specifically, to a sintering flue gas treatment device. Background Technology

[0002] Sintering flue gas contains a large amount of carbon monoxide, an energy-containing waste gas. If left untreated and allowed to escape into the environment, it will cause great harm: carbon monoxide is the most widespread and abundant pollutant in the atmosphere. It damages the function of the heart, brain, and respiratory system, seriously endangering human health; it can react with NMHC (non-methane hydrocarbons) and NOx in the atmosphere, forming photochemical pollution; it can also react with ozone in the atmosphere, causing a decrease in ozone levels. The discharge and treatment of industrial waste gas must give way to environmental protection engineering and ecological protection engineering to effectively protect the environment. In current technology, the treatment of sintering flue gas containing carbon monoxide mainly adopts the regenerative thermal oxidation method: heating the flue gas through heat exchange components. The sintering flue gas is burned in the combustion chamber, converting the carbon monoxide it contains into carbon dioxide and water, which are then discharged. The mainstream design of the regenerative oxidation method generally consists of a switching valve and two sets of ceramic heat exchange modules. The flue gas enters one set of heat exchange modules through the switching valve to be heated, and then enters the combustion chamber for combustion. The flue gas produced by combustion passes through the other set of heat exchange modules for heat energy recovery. When the next set of sintering flue gas enters the device, the switching valve is responsible for reversing the direction of the flue gas. However, the switching valve is often in a high-temperature state when the sintering flue gas passes through it, which is a challenge for the rubber sealing rings and other flexible sealing components responsible for sealing. High temperature will accelerate the aging and failure of the sealing rings. The switching valve in the existing technology cannot effectively cool the sealing parts, so it is urgent to solve this problem. Summary of the Invention

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a sintering flue gas treatment device, which solves the technical problem of premature aging and aging of the switching valve sealing ring component caused by long-term high-temperature heating in the prior art.

[0004] This invention discloses a sintering flue gas treatment device, comprising: The base has a processing box installed on its top. The bottom left and right sides of the processing box are respectively fixedly connected to a connecting pipe one and a connecting pipe two. The inner cavity of the processing box is equipped with a burner, a heat exchange ceramic one, and a heat exchange ceramic two. A switching valve is installed on the top of the base. A rotating shaft is rotatably mounted in the middle of the switching valve. A valve plate is fixedly sleeved on the outer surface of the rotating shaft. A sealing groove is opened on the outer side of the valve plate. A sealing gasket is glued to the inner wall of the sealing groove. A connecting groove one is opened on the front side of the outer surface of the rotating shaft. A connecting groove two and a connecting groove three are opened sequentially on the upper and lower sides of the rear end of the outer surface of the rotating shaft. A heat exchange box is installed on the rear side of the switching valve. An inlet pipe is installed in the middle of the heat exchange box. A pump is installed on the outer side of the heat exchange box. One end of the inlet pipe extends into the inner wall of the connecting groove two. A sealing cylinder located inside the connecting groove two is fixedly sleeved on the outer surface of the inlet pipe. A pressurized reflux mechanism is installed at the opening of the connecting groove three. The left and right sides of the switching valve are connected to connecting pipe one and connecting pipe two, respectively. An exhaust pipe is connected to the lower left side of the switching valve, and an air inlet pipe is connected to the upper right side of the switching valve. The inner cavity of the heat exchange box is filled with heat exchange liquid.

[0005] Preferably, the inner cavity of the treatment box is U-shaped, a combustion chamber is provided at the top of the inner cavity, the burner is located below the combustion chamber, and the heat exchange ceramic one and heat exchange ceramic two are located on the left and right sides of the bottom of the inner cavity of the treatment box, respectively.

[0006] Preferably, the pressurized reflux mechanism includes a reflux pipe fixedly connected to the three openings of the connecting groove, a reflux cylinder fixedly connected to the bottom of the reflux pipe, a spring movably sleeved on the bottom of the inner wall of the reflux cylinder, a piston sealed on the top of the inner wall of the reflux cylinder, the two ends of the spring being elastically connected to the piston and the reflux cylinder respectively, and a reflux groove located below the piston is opened in the middle of the outer surface of the reflux cylinder.

[0007] Preferably, the sealing cylinder is made of rubber block, and the surface of the sealing cylinder is in an interference fit with the inner wall of the connecting groove.

[0008] Preferably, the first connecting groove extends from top to bottom through the front side of the outer surface of the rotating shaft, the third connecting groove is connected to the first connecting groove located on the lower side, and the second connecting groove is connected to the first connecting groove located on the upper side.

[0009] Preferably, a motor is mounted on the front of the switching valve, and the output shaft of the motor is connected to the rotating shaft for transmission.

[0010] Preferably, the valve plate is in a vertical position under initial conditions, the first connecting pipe and the exhaust pipe are isolated on the left side of the valve plate, and the second connecting pipe and the intake pipe are isolated on the right side of the valve plate.

[0011] Preferably, a limiting ring is fixedly connected to the outer surface of the inlet pipe and abuts against the rear end of the rotating shaft, and the size of the limiting ring is larger than the size of the sealing cylinder.

[0012] Preferably, a pump is installed on the outside of the heat exchange box, the pump's discharge end is connected to the inlet pipe, and the pump's inlet end extends to the bottom of the heat exchange box's inner cavity.

[0013] Preferably, a semiconductor cooler is fixedly installed at the bottom of the heat exchange box, with the cold end of the semiconductor cooler facing the inner cavity of the heat exchange box and in contact with the heat exchange liquid located in the inner cavity of the heat exchange box, and a fan is installed at the hot end of the semiconductor cooler.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: 1. This device has been redesigned, significantly improving the service life of the switching valve. A sealing groove is created on the outer side of the valve plate, with a sealing gasket glued inside. This gasket seals against the joint between the valve plate and the inner wall of the switching valve, forming a seal. Connecting grooves one, two, and three are respectively created on the surface of connecting groove one, forming a circulation channel for the heat exchange liquid. A pump and inlet pipe pump the heat exchange liquid from the heat exchange box cavity into connecting groove two, and then sequentially flow along the upper side of the sealing groove cavity, connecting groove one, the lower side of the sealing groove cavity, connecting groove three, the return pipe, the return cylinder, and the return groove back to the heat exchange box, forming a circulating flow of the heat exchange liquid. This design, by circulating heat exchange liquid inside the sealing gasket for heat exchange and cooling, significantly reduces the temperature rise of the sealing gasket due to working heat, effectively delaying the heat aging and failure of the sealing gasket.

[0015] 2. The pressurized reflux mechanism designed in this device can increase the pressure of the heat exchange liquid entering the inner cavity of the sealing groove on the sealing gasket, thereby making the sealing gasket fit more tightly against the inner wall of the switching valve under hydraulic action. To achieve this, a reflux pipe and a reflux cylinder are installed at the outlet of the connecting groove three. When the pump pumps positive pressure heat exchange liquid into the inner cavity of the sealing groove and fills the sealing groove, the heat exchange liquid flows back to the reflux cylinder through the connecting groove three. The piston is elastically supported upward by the spring. If the heat exchange liquid wants to flow back from the reflux groove to the inner cavity of the heat exchange box, it needs to push the piston downward and overcome the elastic force from the spring. At this time, the pump continuously pressurizes, thereby continuously increasing the hydraulic pressure of the heat exchange liquid in the inner cavity of the sealing groove, thereby improving the sealing performance of the switching valve.

[0016] 3. Finally, this device is equipped with a cooling system including a heat exchange box. This system includes a heat exchange box, a pump, an inlet pipe, a semiconductor cooler, and a fan. After the heat exchange liquid circulates multiple times through the inner cavity of the sealed tank, the temperature of the heat exchange liquid flowing back into the inner cavity of the heat exchange box rises. The heat exchange liquid can be cooled by the semiconductor cooler installed at the bottom of the heat exchange box after being powered on, using its cold end. This design reduces the space occupied by the device compared to traditional forced air cooling, further reduces the replacement and maintenance costs of the cooling structure, and significantly improves the reliability of the device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0018] Figure 1 This is a front view diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the working state of the switching valve of the present invention, cut from the front. Figure 1 ; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the working state of the switching valve of the present invention, cut from the front. Figure 2 ; Figure 5 This is a front axial section view of the switching valve of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B; Figure 7 This is a top-view axial section diagram of the switching valve of the present invention; Figure 8 For the present invention Figure 7 Enlarged schematic diagram of the structure at point C; Figure 9 This is a schematic diagram showing the separation of the motor, shaft, valve plate, sealing gasket, and pressurized recirculation mechanism of the present invention; Figure 10 This is a schematic diagram showing the separation of the pump, inlet pipe, limiting ring, sealing cylinder, return pipe, return cylinder, spring, and piston of the present invention.

[0019] The components are as follows: 1. Base; 2. Processing box; 3. Burner; 4. Heat exchange ceramic one; 5. Heat exchange ceramic two; 6. Switching valve; 7. Inlet pipe; 8. Connecting pipe one; 9. Connecting pipe two; 10. Exhaust pipe; 11. Motor; 12. Shaft; 13. Valve plate; 14. Sealing groove; 15. Sealing gasket; 16. Connecting groove one; 17. Connecting groove two; 18. Heat exchange box; 19. Pump; 20. Liquid inlet pipe; 21. Semiconductor cooler; 22. Fan; 23. Limiting ring; 24. Sealing cylinder; 25. Connecting groove three; 26. Return pipe; 27. Return cylinder; 28. Return groove; 29. ​​Spring; 30. Piston.

[0020] Specific implementation party The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0022] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0023] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] like Figures 1-10 As shown, a sintering flue gas treatment apparatus of this disclosure includes: The base 1 has a processing box 2 installed on top of it. The bottom left and right sides of the processing box 2 are respectively fixedly connected to a connecting pipe 8 and a connecting pipe 9. The inner cavity of the processing box 2 is equipped with a burner 3, a heat exchange ceramic 4 and a heat exchange ceramic 5. A switching valve 6 is installed on the top of the base 1. A rotating shaft 12 is rotatably installed in the middle of the switching valve 6. A valve plate 13 is fixedly sleeved on the outer surface of the rotating shaft 12. A sealing groove 14 is opened on the outer side of the valve plate 13. A sealing gasket 15 is glued to the inner wall of the sealing groove 14. A connecting groove 16 is opened on the front side of the outer surface of the rotating shaft 12. A connecting groove 27 and a connecting groove 3 25 are opened on the upper and lower sides of the rear end of the outer surface of the rotating shaft 12 in sequence. A heat exchange box 18 is installed on the rear side of the switching valve 6. An inlet pipe 20 is installed in the middle of the heat exchange box 18. A pump 19 is installed on the outer side of the heat exchange box 18. One end of the inlet pipe 20 extends into the inner wall of the connecting groove 27. A sealing cylinder 24 located inside the connecting groove 27 is fixedly sleeved on the outer surface of the inlet pipe 20. A pressurized reflux mechanism is installed at the opening of the connecting groove 3 25. The left and right sides of the switching valve 6 are connected to the connecting pipe 8 and the connecting pipe 9 respectively. The lower left side of the switching valve 6 is connected to the exhaust pipe 10, and the upper right side of the switching valve 6 is connected to the air inlet pipe 7. The inner cavity of the heat exchange box 18 is filled with heat exchange liquid. This device has been redesigned, significantly improving the service life of the switching valve 6. A sealing groove 14 is created on the outer side of the valve plate 13, and a sealing gasket 15 is glued inside it. The sealing gasket 15 seals against the joint between the valve plate 13 and the inner wall of the switching valve 6, thus forming a seal. Connecting grooves 16, 17, and 25 are respectively created on the surface of the connecting groove 16, allowing a circulation channel for the heat exchange liquid to flow inside the sealing groove 14. A pump 19 and an inlet pipe 20 are installed to facilitate the flow of the heat exchange liquid. The heat exchange liquid inside the chamber of the box 18 is pumped into the second connecting groove 17, and then flows back to the heat exchange box 18 in sequence along the upper side of the inner cavity of the sealing groove 14, the first connecting groove 16, the lower side of the inner cavity of the sealing groove 14, the third connecting groove 25, the return pipe 26, the return cylinder 27 and the return groove 28, forming a circulating flow of heat exchange liquid. This design significantly reduces the degree of temperature rise of the sealing gasket 15 due to working heat by circulating heat exchange liquid to the inner side of the sealing gasket 15, effectively delaying the heat aging and failure of the sealing gasket 15.

[0027] Finally, this device is equipped with a cooling system including a heat exchange box 18. The system includes a heat exchange box 18, a pump 19, a liquid inlet pipe 20, a semiconductor cooler 21, and a fan 22. After the heat exchange liquid circulates multiple times through the inner cavity of the sealed tank 14, the temperature of the heat exchange liquid flowing back into the inner cavity of the heat exchange box 18 increases. The heat exchange liquid can be cooled by the cold end of the semiconductor cooler 21 installed at the bottom of the heat exchange box 18 after being powered on. This design reduces the space occupied by the device compared with the traditional forced air cooling, further reduces the replacement and maintenance costs of the cooling structure, and significantly improves the reliability of the device.

[0028] In this embodiment, the inner cavity of the processing box 2 is arranged in a "U" shape. The top of the inner cavity of the processing box 2 is provided with a combustion chamber, the burner 3 is located below the combustion chamber, and the heat exchange ceramic 4 and the heat exchange ceramic 5 are located on the left and right sides of the bottom of the inner cavity of the processing box 2, respectively. like Figure 2 As shown, the sintering flue gas enters the inner cavity of the switching valve 6 through the inlet pipe 7, and then sequentially passes through the connecting pipe 2 9, the heat exchange ceramic 2 5, the heat exchange ceramic 1 4, the connecting pipe 1 8, and the exhaust pipe 10, completing combustion and exhaust. Figure 4 As shown, the valve plate 13 rotates, changing the direction of the flue gas inside the switching valve 6.

[0029] In this embodiment, the pressurized reflux mechanism includes a reflux pipe 26 fixedly connected to the opening of the connecting groove 25, a reflux cylinder 27 fixedly connected to the bottom of the reflux pipe 26, a spring 29 movably sleeved on the bottom of the inner wall of the reflux cylinder 27, a piston 30 sealed on the top of the inner wall of the reflux cylinder 27, the two ends of the spring 29 being elastically connected to the piston 30 and the reflux cylinder 27 respectively, and a reflux groove 28 located below the piston 30 is opened in the middle of the outer surface of the reflux cylinder 27. The pressurized reflux mechanism designed in this device can increase the pressure of the heat exchange liquid entering the inner cavity of the sealing groove 14 on the sealing gasket 15, thereby making the sealing gasket 15 fit more tightly against the inner wall of the switching valve 6 under hydraulic action. To achieve this, a reflux pipe 26 and a reflux cylinder 27 are installed at the outlet of the connecting groove 3 25. When the pump 19 pumps positive pressure heat exchange liquid into the inner cavity of the sealing groove 14 and fills the sealing groove 14, the heat exchange liquid flows back to the reflux cylinder 27 through the connecting groove 3 25. The spring 29 provides elastic support to the piston 30 upward. If the heat exchange liquid wants to flow back from the reflux groove 28 to the inner cavity of the heat exchange box 18, it needs to push the piston 30 downward and overcome the elastic force from the spring 29. At this time, the pump 19 continuously pressurizes, thereby continuously increasing the hydraulic pressure of the heat exchange liquid in the inner cavity of the sealing groove 14, thereby improving the sealing performance of the switching valve 6.

[0030] In this embodiment, the sealing cylinder 24 is made of rubber block, and the surface of the sealing cylinder 24 is in an interference fit with the inner wall of the connecting groove 17. like Figure 6 As shown, since the rotating shaft 12 needs to rotate at a certain angle under the drive of the motor 11, the connection between the liquid inlet pipe 20 and the rotating shaft 12 needs to be mainly based on the sealing movable sleeve, while the sealing cylinder 24 can seal the opening of the connecting groove 2 17 and ensure that the heat exchange liquid from the liquid inlet pipe 20 can enter the connecting groove 2 17 and the sealing groove 14 without leakage.

[0031] In this embodiment, the first connecting groove 16 extends from top to bottom through the front side of the outer surface of the rotating shaft 12, the third connecting groove 25 is connected to the first connecting groove 16 located on the lower side, and the second connecting groove 17 is connected to the first connecting groove 16 located on the upper side. like Figure 4 As shown, the flow path of the heat exchange liquid in the inner cavity of the sealing groove 14 is: connecting groove 2 17, upper side of sealing groove 14, connecting groove 1 16, lower side of sealing groove 14, connecting groove 3 25, and the heat exchange liquid flows back into the inner cavity of the heat exchange box 18. The flowing heat exchange liquid will carry away some of the heat of the sealing gasket 15 and reduce its working temperature.

[0032] In this embodiment, a motor 11 is mounted on the front of the switching valve 6, and the output shaft of the motor 11 is connected to the rotating shaft 12 in a transmission connection. The rotating shaft 12 can rotate in both directions, such as Figure 2 and Figure 4 As shown, the valve plate 13 adjusts the flow direction of the flue gas inside the connecting pipe 1 8 and the connecting pipe 2 9 by rotating at a certain angle and resetting, so that the flue gas can be switched by the switching valve 6 to achieve the function of uninterrupted oxidation heat storage treatment.

[0033] In this embodiment, the valve plate 13 is in a vertical state under initial conditions, the connecting pipe 1 8 and the exhaust pipe 10 are isolated on the left side of the valve plate 13, and the connecting pipe 2 9 and the intake pipe 7 are isolated on the right side of the valve plate 13. like Figure 2 As shown, the flue gas flows in the device in the following direction: Figure 2 As indicated by the arrow, after completing the first flue gas treatment, the valve plate 13 is driven by the motor 11 and the rotating shaft 12 and rotates to the position indicated by the arrow. Figure 4 In this state, the direction of flue gas flow inside the intake pipe 7 and exhaust pipe 10 remains unchanged, while the changes inside the connecting pipe 1 8 and connecting pipe 2 9 achieve the functional reversal of heat exchange ceramic 1 4 and heat exchange ceramic 2 5.

[0034] In this embodiment, a limiting ring 23 is fixedly connected to the outer surface of the liquid inlet pipe 20 and abuts against the rear end of the rotating shaft 12. The size of the limiting ring 23 is larger than the size of the sealing cylinder 24. like Figure 6As shown, the heat exchange liquid in the inner cavity of the sealing groove 14 and the connecting groove 17 increases with the drive of the pump 19. In order to prevent the sealing cylinder 24 from moving outward under hydraulic pressure, a limit ring 23 is set to avoid this phenomenon.

[0035] In this embodiment, a pump 19 is installed on the outside of the heat exchange box 18. The discharge end of the pump 19 is connected to the inlet pipe 20, and the inlet end of the pump 19 extends to the bottom of the inner cavity of the heat exchange box 18. Pump 19 is responsible for providing the power for the flow of heat exchange fluid in the inner cavity of sealing groove 14, thereby maintaining the continuous cooling function of sealing gasket 15.

[0036] In this embodiment, a semiconductor cooler 21 is fixedly installed at the bottom of the heat exchange box 18. The cold end of the semiconductor cooler 21 faces the inner cavity of the heat exchange box 18 and is in contact with the heat exchange liquid located in the inner cavity of the heat exchange box 18. A fan 22 is installed at the hot end of the semiconductor cooler 21. like Figure 5 As shown, as the number of circulations of the heat exchange liquid in the heat exchange box 18 increases, the heat will drive the temperature of the heat exchange liquid to rise. At this time, the semiconductor cooler 21 can cool the heat exchange liquid in the heat exchange box 18 to maintain its cooling and heat exchange function.

[0037] Working principle: When this device is in operation: First, the sintering flue gas enters the space located on the right side of the valve plate 13 inside the switching valve 6 through the inlet pipe 7, such as... Figure 1 As shown, the flue gas moves upward through the connecting pipe 29 to the heat exchange ceramic 25 in the inner cavity of the treatment box 2. The heat exchange ceramic 25 exchanges heat with the flue gas and heats it to the temperature required for combustion. It then moves to the left along the combustion chamber in the inner cavity of the treatment box 2. At the same time, the burner 3 ignites the flue gas to produce a flame. The carbon monoxide in the flue gas burns to produce carbon dioxide and water. The flue gas after combustion exchanges heat through the heat exchange ceramic 4 and cools down. Then, it enters the left side of the inner cavity of the switching valve 6 from the inner cavity of the connecting pipe 8 and is finally discharged along the exhaust pipe 10. Then, start the motor 11 and drive the rotating shaft 12 and valve plate 13 to rotate clockwise around their own axis, as follows. Figure 4 As shown, the connecting pipe 8 and the intake pipe 7 are isolated by the valve plate 13 to the upper side of the inner cavity of the switching valve 6, and the connecting pipe 9 and the exhaust pipe 10 are isolated by the valve plate 13 to the lower side of the inner cavity of the switching valve 6. At this time, the flue gas enters the connecting pipe 8 from the upper side of the inner cavity of the switching valve 6 in the opposite direction, and passes upward through the heat exchange ceramic 4. After the heat exchange ceramic 4 exchanges heat with the flue gas and heats it to the temperature required for combustion, it moves to the right along the combustion chamber of the inner cavity of the treatment box 2. The carbon monoxide in the flue gas burns to produce carbon dioxide and water. The flue gas after combustion exchanges heat through the heat exchange ceramic 5 and cools down. Then it enters the lower side of the inner cavity of the switching valve 6 from the inner cavity of the connecting pipe 9 and finally exits along the exhaust pipe 10. Finally, after each flue gas treatment cycle, motor 11 drives shaft 12 and valve plate 13 to rotate or reset. As the flue gas passes through switching valve 6, the temperature of valve plate 13 and sealing gasket 15 rises, activating pump 19 and pumping the heat exchange liquid in the heat exchange box 18 to inlet pipe 20. Figure 5 and Figure 6 As shown, the heat exchange liquid flows from right to left within the inlet pipe 20, and then enters the inner cavity of the sealing groove 14 through the connecting groove 17, where it contacts the sealing gasket 15 and absorbs heat. The trajectory of the heat exchange liquid within the sealing groove 14 is as follows: Figure 5 As shown by the black arrow, when the heat exchange liquid returns to the connecting channel 25, it will flow downward into the inner cavity of the return pipe 26 and the return cylinder 27. At the same time, it will exert pressure on the piston 30 and push the piston 30 downward, compressing the spring 29, so that the heat exchange liquid flows back to the inner cavity of the heat exchange box 18 through the return channel 28, energizing the semiconductor cooler 21 and the fan 22. The cold end of the semiconductor cooler 21 is used to cool the heat exchange liquid in the inner cavity of the heat exchange box 18, while the fan 22 is responsible for carrying away the heat generated by the hot end of the semiconductor cooler 21.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A sintering flue gas treatment device, characterized in that, include: The base (1) has a processing box (2) installed on the top of the base (1). The bottom left and right sides of the processing box (2) are respectively fixedly connected to a connecting pipe one (8) and a connecting pipe two (9). The inner cavity of the processing box (2) is equipped with a burner (3), a heat exchange ceramic one (4) and a heat exchange ceramic two (5). A switching valve (6) is mounted on the top of a base (1). A rotating shaft (12) is rotatably mounted in the middle of the switching valve (6). A valve plate (13) is fixedly sleeved on the outer surface of the rotating shaft (12). A sealing groove (14) is provided on the outer side of the valve plate (13). A sealing gasket (15) is glued to the inner wall of the sealing groove (14). A connecting groove one (16) is provided on the front side of the outer surface of the rotating shaft (12). A connecting groove two (16) is provided on the upper and lower sides of the rear end of the outer surface of the rotating shaft (12). 7) and connecting groove three (25), a heat exchange box (18) is installed on the rear side of the switching valve (6), an inlet pipe (20) is installed in the middle of the heat exchange box (18), a pump (19) is installed on the outside of the heat exchange box (18), one end of the inlet pipe (20) extends to the inner wall of the connecting groove two (17), a sealing cylinder (24) located inside the connecting groove two (17) is fixedly sleeved on the outer surface of the inlet pipe (20), and a pressurized reflux mechanism is installed at the opening of the connecting groove three (25); The left and right sides of the switching valve (6) are connected to the first connecting pipe (8) and the second connecting pipe (9) respectively. The lower left side of the switching valve (6) is connected to the exhaust pipe (10), and the upper right side of the switching valve (6) is connected to the air inlet pipe (7). The inner cavity of the heat exchange box (18) is filled with heat exchange liquid. The pressurized reflux mechanism includes a reflux pipe (26) fixedly connected to the opening of the three connecting grooves (25). A reflux cylinder (27) is fixedly connected to the bottom of the reflux pipe (26). A spring (29) is movably sleeved on the bottom of the inner wall of the reflux cylinder (27). A piston (30) is sealed on the top of the inner wall of the reflux cylinder (27). The two ends of the spring (29) are elastically connected to the piston (30) and the reflux cylinder (27) respectively. A reflux groove (28) located below the piston (30) is opened in the middle of the outer surface of the reflux cylinder (27). The first connecting groove (16) passes through the front side of the outer surface of the rotating shaft (12) from top to bottom. The third connecting groove (25) is connected to the first connecting groove (16) located on the lower side. The second connecting groove (17) is connected to the first connecting groove (16) located on the upper side.

2. The sintering flue gas treatment device according to claim 1, characterized in that, The inner cavity of the processing box (2) is U-shaped. A combustion chamber is provided at the top of the inner cavity of the processing box (2). The burner (3) is located below the combustion chamber. The heat exchange ceramic one (4) and the heat exchange ceramic two (5) are located on the left and right sides of the bottom of the inner cavity of the processing box (2), respectively.

3. The sintering flue gas treatment device according to claim 2, characterized in that, The sealing cylinder (24) is made of rubber block, and the surface of the sealing cylinder (24) is in an interference fit with the inner wall of the connecting groove (17).

4. The sintering flue gas treatment device according to claim 3, characterized in that, A motor (11) is mounted on the front of the switching valve (6), and the output shaft of the motor (11) is connected to the rotating shaft (12) for transmission.

5. A sintering flue gas treatment device according to claim 4, characterized in that, The valve plate (13) is in a vertical position under initial conditions. The first connecting pipe (8) and the exhaust pipe (10) are isolated on the left side of the valve plate (13), and the second connecting pipe (9) and the intake pipe (7) are isolated on the right side of the valve plate (13).

6. The sintering flue gas treatment device according to claim 5, characterized in that, The outer surface of the inlet pipe (20) is fixedly connected to a limiting ring (23) that abuts against the rear end of the rotating shaft (12). The size of the limiting ring (23) is larger than the size of the sealing cylinder (24).

7. A sintering flue gas treatment device according to claim 6, characterized in that, A pump (19) is installed on the outside of the heat exchange box (18). The discharge end of the pump (19) is connected to the inlet pipe (20), and the inlet end of the pump (19) extends to the bottom of the inner cavity of the heat exchange box (18).

8. A sintering flue gas treatment device according to claim 7, characterized in that, A semiconductor cooler (21) is fixedly installed at the bottom of the heat exchange box (18). The cold end of the semiconductor cooler (21) faces the inner cavity of the heat exchange box (18) and is in contact with the heat exchange liquid located in the inner cavity of the heat exchange box (18). A fan (22) is installed at the hot end of the semiconductor cooler (21).

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