An RTO combustion furnace for waste gas treatment with heat recovery function

Abstract

The present invention discloses an RTO combustion furnace for waste gas treatment with heat recovery function, which relates to the technical field of combustion furnaces. The RTO combustion furnace includes an air induction device, a combustion device, an auxiliary device, and an exhaust device. When carrying out waste gas combustion treatment, a large amount of heat will be generated. The air induction device is used to guide the waste gas into the combustion device, supply gas through the auxiliary device, assist the waste gas in combustion, and intercept part of the generated heat to facilitate the preheating of the next incoming waste gas. The cooled gas is discharged from the combustion device through the exhaust device to facilitate continuous combustion. When the combustion device conducts waste gas combustion, it can adjust the heat exchange area according to the temperature of the waste gas after combustion, thereby automatically adjusting the heat recovery efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of combustion furnaces, and specifically to an RTO combustion furnace for waste gas treatment with a heat recovery function. Background Art

[0002] RTO refers to a regenerative thermal oxidizer, which is mainly used for organic waste gas treatment. By first heating the waste gas and then burning the heated waste gas, the organic components in the waste gas are completely decomposed into carbon dioxide and water, so that the treated waste gas meets the emission standards.

[0003] In the current waste gas treatment process, although there is a process of heat recovery and utilization, the heat storage body absorbs heat and exchanges heat with the subsequent incoming waste gas to raise its temperature, thereby reducing the combustion energy consumption. However, the waste gas to be transported is often generated during the previous processing, and the gas supply volume is in a fluctuating state. When the conventional heat storage body exchanges heat, it uses a fixed heat exchange stroke, which easily leads to the inability to meet the recovery of combustion heat within a fixed time, resulting in heat waste and increasing the combustion energy consumption to a certain extent.

[0004] In addition, due to the high temperature of waste gas combustion, conventional mechanical equipment is affected by temperature and cannot meet the requirement of assisting in heat energy recovery during the combustion process. Summary of the Invention

[0005] The purpose of the present invention is to provide an RTO combustion furnace for waste gas treatment with a heat recovery function to solve the problems raised in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The RTO combustion furnace includes an air inlet device, a combustion device, an auxiliary device, and an exhaust device. The air inlet device and the combustion device are connected by a pipeline. The auxiliary device and the combustion device are connected by a pipeline. The exhaust device and the combustion device are connected. The combustion device is used to adjust the heat recovery efficiency.

[0008] When carrying out waste gas combustion treatment, a large amount of heat is generated. The air inlet device is used to guide the waste gas into the combustion device. The auxiliary device supplies gas to assist the waste gas in burning and intercepts part of the generated heat for preheating the next incoming waste gas. The cooled gas is discharged from the combustion device through the exhaust device to facilitate continuous combustion. When the combustion device burns the waste gas, it can adjust the heat exchange area according to the temperature after waste gas combustion, thereby automatically adjusting the heat recovery efficiency.

[0009] Further, the air inlet device includes an air inlet pipe, an RTO fan, and a riser pipe. The air inlet pipe, the RTO fan, and the riser pipe are connected in sequence. The riser pipe is connected to the combustion device by a pipeline;

[0010] The combustion device includes a box body, a heat storage group and an adjustment component. An air inlet is provided on the box body. The outlet of the riser is connected to the air inlet pipeline. A heat storage chamber is provided on the box body. The exhaust device is connected to the heat storage chamber. A purge chamber is provided between the air inlet and the heat storage chamber. The auxiliary device is respectively connected to the heat storage chamber and the purge chamber. The heat storage group is placed in the heat storage chamber. The heat storage group includes a number of heat storage bodies, and the distance between adjacent heat storage bodies is adjusted by the adjustment component.

[0011] The air inlet pipe is used to connect to the waste gas source. Through the RTO fan, the waste gas is pumped into the combustion device through the riser. Through the air inlet for diversion, the waste gas enters the heat storage chamber. The box body provides a combustion space through the heat storage chamber, with heat storage bodies built in. The heat generated after the waste gas burns is absorbed by the heat storage group. The heat storage group includes multiple heat storage bodies. By changing the distance between adjacent heat storage bodies, the number of heat storage bodies involved in heat exchange can be controlled, improving the heat exchange efficiency. A valve is provided at the connection between the exhaust device and the heat storage chamber to control the on-off of the flow channel. During combustion, it remains closed to facilitate heat storage by the heat storage group. After heat storage is completed, when subsequent waste gas enters, the heat storage bodies are used to preheat the newly incoming waste gas, thereby recovering heat and reducing energy consumption.

[0012] Further, the adjustment component includes a bracket, a first temperature-sensitive piece and a second temperature-sensitive piece. The bracket is firmly connected to the wall surface of the heat storage chamber. A number of through holes are provided on the heat storage body, and the through holes are arranged vertically. An installation groove is provided inside the heat storage body. The first temperature-sensitive piece and the second temperature-sensitive piece are placed in the installation groove, and the first temperature-sensitive piece and the second temperature-sensitive piece are firmly connected. The two sides of the first temperature-sensitive piece and the second temperature-sensitive piece are respectively firmly connected to the wall surface of the installation groove. The first temperature-sensitive piece is located outside the second temperature-sensitive piece, and the thermal expansion coefficient of the first temperature-sensitive piece is greater than that of the second temperature-sensitive piece;

[0013] Initially: The first temperature-sensitive piece and the second temperature-sensitive piece are arranged horizontally, and the outside of the first temperature-sensitive piece contacts the adjacent heat storage body, and the side of the adjacent heat storage body contacts.

[0014] During adjustment: The first temperature-sensitive piece and the second temperature-sensitive piece are arranged in an arc shape, and there is a flow-through gap between adjacent heat storage bodies.

[0015] The bracket is fixed through the wall of the regenerator chamber, and the regenerator group is placed on the bracket. Through the split setting, in the initial state, the regenerators are in contact with each other. The first temperature sensor and the second temperature sensor are attached in the installation groove. When the waste gas burns, the burning gas diffuses towards the through holes on the regenerator. The regenerator is made of ceramic material. When the high-temperature gas flows through, the regenerator is heated, the temperature of the regenerator rises, and heat is transferred to the first temperature sensor and the second temperature sensor which are tightly connected. The first temperature sensor and the second temperature sensor are deformed by heat. Since the first temperature sensor and the second temperature sensor are fixed at both ends and limited on the side close to the installation groove, the deformation direction is away from the installation groove side, and the middle is in a convex arc shape, pushing the adjacent regenerator to move, that is, increasing the distance between two adjacent regenerators, forming an over-flow gap, increasing the heat exchange area between the regenerator and the hot gas flow, and improving the heat exchange efficiency.

[0016] Further, there are four groups of regenerator groups, and a "cross flow channel" is formed between the four groups of regenerator groups. The moving directions of the regenerators in adjacent two groups of regenerator groups are perpendicular. There are sliding grooves on the bracket. The outermost regenerator in the same group is tightly connected to the sliding groove, and the rest of the regenerators are slidably connected to the sliding groove.

[0017] Four groups of regenerator groups are arranged on the bracket, and a cross flow channel is formed in the middle for introducing waste gas. The moving directions of the regenerators in the four groups of regenerator groups are perpendicular. In the initial state, the regenerators are in a fitting state. As the heat storage progresses, the inner regenerators are pushed inward under the action of the first temperature sensor and the second temperature sensor on the outer side, so that the regenerators slide along the sliding groove, increasing the heat exchange area in the middle and improving the heat exchange efficiency.

[0018] Further, the combustion device further includes a truncation assembly. There is an auxiliary exhaust port on the box body. The auxiliary exhaust port is located below the purging chamber. The auxiliary exhaust port is connected to the purging chamber through a pipeline. Truncation assemblies are respectively arranged in the air inlet and the auxiliary exhaust port. The truncation assembly includes a plug plate, a valve plate and a truncation motor. The truncation motor is tightly connected to the box body. The output end of the truncation motor is tightly connected to the valve plate. There is a through groove on the valve plate. The two plug plates are respectively tightly connected to the wall surfaces of the air inlet and the auxiliary exhaust port, and the plug plate is adapted to the through groove.

[0019] By setting the truncation assembly, when the waste gas is introduced, the truncation assembly in the air inlet is in an open state, that is, the truncation motor drives the valve plate to rotate by an angle, so that the through groove of the valve plate does not coincide with the plug plate. The waste gas enters the air inlet from the riser pipe and enters the regenerator chamber through the purging chamber. At this time, the truncation assembly in the auxiliary exhaust port is in a cut-off state, that is, the truncation motor drives the valve plate to rotate, so that the through groove of the valve plate coincides with the plug plate, avoiding air leakage and affecting the combustion quality.

[0020] Further, the auxiliary device includes a purging blower, a purging pipe, and a combustion-supporting blower. An air guiding pipe is provided at the output end of the purging blower. The air guiding pipe is communicated with the purging pipe. One end of the purging pipe is inserted into the purging chamber. A plurality of air holes are provided in the circumferential direction of the purging pipe. The combustion-supporting blower is communicated with the heat storage chamber pipeline.

[0021] By providing a purging blower, after combustion and heat storage are completed, the purging blower supplies air to the purging pipe through the air guiding pipe. A plurality of air holes are provided in the circumferential direction of the part of the purging pipe inserted into the purging chamber. The inner chamber of the box body and the heat storage group are automatically cleaned through the air holes, preventing impurities from adhering and affecting the combustion and heat storage quality. During combustion, the combustion-supporting blower supplies gas to the heat storage chamber to assist in the combustion of waste gas.

[0022] As an optimization, the exhaust device includes an exhaust pipe, a diversion pipe, a mixing box, and a chimney. A main exhaust port is provided on one side of the box body. The heat storage chamber is communicated with the exhaust pipe through the main exhaust port. The auxiliary exhaust port is communicated with the mixing box through the diversion pipe. The end of the exhaust pipe is communicated with the mixing box. The outlet of the mixing box is communicated with the chimney. A main exhaust port is provided on one side of the box body for discharging the high-temperature gas after the combustion of waste gas. It is sent into the mixing box through the exhaust pipe and discharged through the chimney. During purging, the cutoff component in the auxiliary exhaust port is in an open state. The purged gas flows out from the auxiliary exhaust port and enters the mixing box through the diversion pipe, and finally is discharged through the chimney.

[0023] As an optimization, the exhaust device further includes a purification pipe. The inlet of the purification pipe is communicated with the chimney. The outlet of the purification pipe faces the connection between the RTO blower and the riser pipe. By providing a purification pipe, the purging gas discharged from the chimney is intercepted. The flow path is switched by setting a valve. An activated carbon adsorbent is provided in the middle of the purification pipe to purify the purging gas. The purified gas flows back to the outlet of the RTO blower and is mixed with the waste gas and enters the heat storage chamber for combustion.

[0024] As an optimization, the air guiding device further includes a fresh air pipe. The fresh air pipe is communicated with the air inlet pipe. By providing a fresh air pipe, air is introduced to facilitate combustion.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The heat storage group includes a plurality of heat storage bodies. By changing the distance between adjacent heat storage bodies, the number of heat storage bodies involved in heat exchange can be controlled, thereby improving the heat exchange efficiency. The heat storage bodies are used to preheat the newly incoming waste gas, so as to recover heat and reduce energy consumption. When the waste gas burns, the burning gas diffuses towards the through holes on the heat storage bodies. The heat storage bodies are made of ceramic material. When high-temperature gas flows through, the heat storage bodies are heated, and the temperature of the heat storage bodies rises. Then, heat is transferred to the first temperature-sensitive piece and the second temperature-sensitive piece which are tightly connected. The first temperature-sensitive piece and the second temperature-sensitive piece are deformed by heat. Since the first temperature-sensitive piece and the second temperature-sensitive piece are fixed at both ends and are limited on one side close to the installation groove, the deformation direction is towards the side away from the installation groove, and the middle is in a convex arc shape, which pushes the adjacent heat storage bodies to move, that is, the distance between adjacent two heat storage bodies is increased, forming an over-flow gap, increasing the heat exchange area between the heat storage bodies and the hot air flow, and improving the heat exchange efficiency. The moving directions of the heat storage bodies in the four heat storage groups are perpendicular. In the initial state, the heat storage bodies are in a fitting state. As heat storage progresses, the inner heat storage bodies are pushed inward under the action of the first temperature-sensitive piece and the second temperature-sensitive piece on the outer side, causing the heat storage bodies to slide along the sliding grooves, increasing the heat exchange area in the middle and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a schematic diagram of the waste gas supply of the present invention;

[0028] Figure 3 is a schematic diagram of the waste gas intake treatment of the present invention;

[0029] Figure 4 is a schematic diagram of the purge gas flow path of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the heat storage group of the present invention;

[0031] Figure 6 is a schematic diagram of the moving direction of the heat storage body of the present invention;

[0032] Figure 7 is a schematic diagram of the structure of the heat storage body of the present invention.

[0033] In the figure: 1. Air induction device; 11. Air inlet pipe; 12. Fresh air pipe; 13. RTO fan; 14. Lift pipe; 2. Combustion device; 21. Box body; 211. Air inlet; 212. Purge chamber; 213. Regenerator; 214. Main exhaust port; 215. Auxiliary exhaust port; 22. Adjustment component; 221. Bracket; 222. First temperature sensor; 223. Second temperature sensor; 23. Cut-off component; 231. Plug plate; 232. Valve plate; 233. Cut-off motor; 24. Regeneration group; 241. Regenerator body; 2411. Through hole; 2412. Installation groove; 3. Auxiliary device; 31. Purge fan; 32. Induction pipe; 33. Purge pipe; 34. Combustion-supporting fan; 4. Exhaust device; 41. Discharge pipe; 42. Diversion pipe; 43. Air mixing box; 44. Chimney; 45. Purification pipe. Detailed implementation mode

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment: As Figures 1-7 shown, the present invention provides a technical solution for an RTO combustion furnace for waste gas treatment with a heat recovery function.

[0036] The RTO combustion furnace includes an air induction device 1, a combustion device 2, an auxiliary device 3 and an exhaust device 4. The air induction device 1 is connected to the combustion device 2 through a pipeline, the auxiliary device 3 is connected to the combustion device 2 through a pipeline, the exhaust device 4 is connected to the combustion device 2, and the combustion device 2 is used to adjust the heat recovery efficiency.

[0037] When carrying out waste gas combustion treatment, a large amount of heat will be generated. The air induction device 1 is used to guide the waste gas into the combustion device 2, supply gas through the auxiliary device 3, assist the waste gas to burn, and intercept part of the generated heat to facilitate preheating the next incoming waste gas. The cooled gas is discharged from the combustion device 2 through the exhaust device 4 to facilitate continuous combustion. When the combustion device 2 burns waste gas, it can adjust the heat exchange area according to the temperature of the waste gas after combustion, so as to automatically adjust the heat recovery efficiency.

[0038] Further, the air induction device 1 includes an air inlet pipe 11, an RTO fan 13 and a lift pipe 14. The air inlet pipe 11, the RTO fan 13 and the lift pipe 14 are connected in sequence, and the lift pipe 14 is connected to the combustion device 2 through a pipeline;

[0039] The combustion device 2 includes a box body 21, a heat storage group 24 and an adjustment assembly 22. An air inlet 211 is provided on the box body 21. The outlet of the riser 14 is in pipeline communication with the air inlet 211. A heat storage chamber 213 is provided on the box body 21. The exhaust device 4 is in communication with the heat storage chamber 213. A purging chamber 212 is provided between the air inlet 211 and the heat storage chamber 213. The auxiliary device 3 is respectively in communication with the heat storage chamber 213 and the purging chamber 212. The heat storage group 24 is placed in the heat storage chamber 213. The heat storage group 24 includes a number of heat storage bodies 241. The distance between adjacent heat storage bodies 241 is adjusted by the adjustment assembly 22.

[0040] The air inlet pipe 11 is used to connect to the waste gas source. Through the RTO fan 13, the waste gas is pumped into the combustion device 2 through the riser 14. Through the diversion of the air inlet 211, the waste gas enters the heat storage chamber 213. The box body 21 provides a combustion space through the heat storage chamber 213 and is internally provided with heat storage bodies 241. The heat generated after the waste gas burns is absorbed by the heat storage group 24. The heat storage group 24 includes a plurality of heat storage bodies 241. By changing the distance between adjacent heat storage bodies 241, the number of heat storage bodies 241 involved in heat exchange can be controlled, improving the heat exchange efficiency. A valve is provided at the connection between the exhaust device 4 and the heat storage chamber 213 to control the on-off of the flow channel. During combustion, it remains closed to facilitate heat storage by the heat storage group 24. After heat storage is completed, when subsequent waste gas enters, the heat storage bodies 241 are used to preheat the newly incoming waste gas, thereby recovering heat and reducing energy consumption.

[0041] Further, the adjustment assembly 22 includes a bracket 221, a first temperature sensing piece 222 and a second temperature sensing piece 223. The bracket 221 is fixedly connected to the wall surface of the heat storage chamber 213. A number of through holes 2411 are provided on the heat storage body 241. The number of through holes 2411 is arranged vertically. An installation groove 2412 is provided inside the heat storage body 241. The first temperature sensing piece 222 and the second temperature sensing piece 223 are placed in the installation groove 2412. The first temperature sensing piece 222 and the second temperature sensing piece 223 are fixedly connected. The two sides of the first temperature sensing piece 222 and the second temperature sensing piece 223 are respectively fixedly connected to the wall surface of the installation groove 2412. The first temperature sensing piece 222 is located outside the second temperature sensing piece 223. The coefficient of thermal expansion of the first temperature sensing piece 222 is greater than that of the second temperature sensing piece 223.

[0042] Initially: The first temperature sensing piece 222 and the second temperature sensing piece 223 are arranged horizontally. The outside of the first temperature sensing piece 222 contacts the adjacent heat storage body 241, and the side edges of the adjacent heat storage bodies 241 are in contact.

[0043] During adjustment: The first temperature sensing piece 222 and the second temperature sensing piece 223 are arranged in an arc shape, and a flow-through gap is provided between adjacent heat storage bodies 241.

[0044] The bracket 221 is fixed through the wall of the regenerator chamber 213. The regenerator group 24 is placed on the bracket 221. Through the split setting, in the initial state, the regenerator bodies 241 are in contact with each other. The first temperature sensing piece 222 and the second temperature sensing piece 223 are attached in the installation groove 2412. When the waste gas burns, the burning gas diffuses towards the through holes 2411 on the regenerator body 241. The regenerator body 241 is made of ceramic material. When the high-temperature gas flows through, the regenerator body 241 is heated. The regenerator body 241 rises in temperature and transfers heat to the first temperature sensing piece 222 and the second temperature sensing piece 223 which are tightly connected. The first temperature sensing piece 222 and the second temperature sensing piece 223 are deformed by heat. Since the first temperature sensing piece 222 and the second temperature sensing piece 223 are fixed at both ends and are limited on the side close to the installation groove 2412, the deformation direction is towards the side away from the installation groove 2412, and the middle is in a convex arc shape, pushing the adjacent regenerator body 241 to move, that is, increasing the distance between two adjacent regenerator bodies 241 to form an over-flow gap, increasing the heat exchange area between the regenerator body 241 and the hot air flow, and improving the heat exchange efficiency.

[0045] Furthermore, there are four groups of regenerator groups 24, and a "cross flow channel" is formed among the four groups of regenerator groups 24. The moving directions of the regenerator bodies 241 in two adjacent regenerator groups 24 are perpendicular. There are sliding grooves on the bracket 221. The outermost regenerator body 241 in the same group is tightly connected to the sliding groove, and the remaining regenerator bodies 241 are slidably connected to the sliding groove.

[0046] Four groups of regenerator groups 24 are arranged on the bracket 221, and a cross flow channel is formed in the middle for introducing waste gas. The moving directions of the regenerator bodies 241 in the four groups of regenerator groups 24 are perpendicular. In the initial state, the regenerator bodies 241 are in a fitting state. As the heat storage progresses, the inner regenerator bodies 241 are pushed inward under the action of the first temperature sensing piece 222 and the second temperature sensing piece 223 on the outside, so that the regenerator bodies 241 slide along the sliding groove, increasing the heat exchange area in the middle and improving the heat exchange efficiency.

[0047] Furthermore, the combustion device 2 further includes a truncation assembly 23. There is an auxiliary exhaust air port 215 on the box body 21. The auxiliary exhaust air port 215 is located below the purging chamber 212, and the auxiliary exhaust air port 215 is connected to the purging chamber 212 through a pipeline. Truncation assemblies 23 are respectively arranged in the air inlet 211 and the auxiliary exhaust air port 215. The truncation assembly 23 includes a plug plate 231, a valve plate 232 and a truncation motor 233. The truncation motor 233 is tightly connected to the box body 21. The output end of the truncation motor 233 is tightly connected to the valve plate 232. There is a through groove on the valve plate 232. The two plug plates 231 are respectively tightly connected to the wall surfaces of the air inlet 211 and the auxiliary exhaust air port 215, and the plug plate 231 is adapted to the through groove.

[0048] By setting the truncation component 23, when the waste gas enters, the truncation component 23 in the air inlet 211 is in an open state, that is, the truncation motor 233 drives the valve plate 232 to rotate by an angle, so that the through groove of the valve plate 232 and the plug plate 231 do not coincide. The waste gas enters the air inlet 211 from the riser 14 and enters the regenerator 213 through the purge chamber 212. At this time, the truncation component 23 in the auxiliary exhaust air outlet 215 is in a cut-off state, that is, the truncation motor 233 drives the valve plate 232 to rotate, so that the through groove of the valve plate 232 and the plug plate 231 coincide, avoiding air leakage and affecting the combustion quality.

[0049] Further, the auxiliary device 3 includes a purge fan 31, a purge pipe 33 and a combustion-supporting fan 34. The output end of the purge fan 31 is provided with an air guiding pipe 32. The air guiding pipe 32 is communicated with the purge pipe 33. One end of the purge pipe 33 is inserted into the purge chamber 212. A plurality of air holes are arranged circumferentially on the purge pipe 33. The combustion-supporting fan 34 is communicated with the regenerator 213 through a pipeline.

[0050] By setting the purge fan 31, after combustion and heat storage are completed, the purge fan 31 supplies air to the purge pipe 33 through the air guiding pipe 32. A plurality of air holes are arranged circumferentially on the part of the purge pipe 33 inserted into the purge chamber 212. The inner chamber of the box body 21 and the heat storage group 24 are automatically cleaned through the air holes to prevent impurities from adhering and affecting the combustion and heat storage quality. When combustion is carried out, the combustion-supporting fan 34 supplies gas to the regenerator 213 to assist in the combustion of the waste gas.

[0051] As an optimization, the exhaust device 4 includes an exhaust pipe 41, a diversion pipe 42, a mixing box 43 and a chimney 44. A main exhaust air outlet 214 is provided on one side of the box body 21. The regenerator 213 is communicated with the exhaust pipe 41 through the main exhaust air outlet 214. The auxiliary exhaust air outlet 215 is communicated with the mixing box 43 through the diversion pipe 42. The end of the exhaust pipe 41 is communicated with the mixing box 43. The outlet of the mixing box 43 is communicated with the chimney 44. A main exhaust air outlet 214 is provided on one side of the box body 21 for discharging the high-temperature gas after the waste gas combustion. The high-temperature gas is sent into the mixing box 43 through the exhaust pipe 41 and discharged through the chimney 44. When purging is carried out, the truncation component 23 in the auxiliary exhaust air outlet 215 is in an open state. The purged gas flows out from the auxiliary exhaust air outlet 215 and enters the mixing box 43 through the diversion pipe 42, and finally is discharged through the chimney 44.

[0052] As an optimization, the exhaust device 4 further includes a purification pipe 45. The inlet of the purification pipe 45 is communicated with the chimney 44. The outlet of the purification pipe 45 faces the connection between the RTO fan 13 and the riser 14. By setting the purification pipe 45, the purge gas discharged from the chimney 44 is intercepted. The flow path is switched by setting a valve. An activated carbon adsorbent is arranged in the middle of the purification pipe 45 to purify the purge gas. The purified gas flows back to the outlet of the RTO fan 13 and is mixed with the waste gas to enter the regenerator for combustion.

[0053] As an optimization, the air induction device 1 further includes a fresh air pipe 12, and the fresh air pipe 12 is communicated with the air inlet pipe 11. By providing the fresh air pipe 12, fresh air is introduced, which facilitates the combustion process.

[0054] The working principle of the present invention: The heat storage group 24 includes a plurality of heat storage bodies 241. By changing the distance between adjacent heat storage bodies 241, the number of heat storage bodies 241 involved in heat exchange can be controlled, thereby improving the heat exchange efficiency; the heat storage bodies 241 are used to preheat the newly incoming exhaust gas, so as to recover heat and reduce energy consumption; when the exhaust gas burns, the burning gas diffuses towards the through holes 2411 on the heat storage bodies 241. The heat storage bodies 241 are made of ceramic material. When high-temperature gas flows through, the heat storage bodies 241 are heated. The heat storage bodies 241 increase in temperature and transfer heat to the first temperature-sensitive piece 222 and the second temperature-sensitive piece 223 which are tightly connected. The first temperature-sensitive piece 222 and the second temperature-sensitive piece 223 deform due to heat. Since the first temperature-sensitive piece 222 and the second temperature-sensitive piece 223 are fixed at both ends and are limited on the side close to the installation groove 2412, the deformation direction is away from the installation groove 2412 side, and the middle is in a convex arc shape, pushing the adjacent heat storage bodies 241 to move, that is, increasing the distance between two adjacent heat storage bodies 241 to form an over-flow gap, increasing the heat exchange area between the heat storage bodies 241 and the hot air flow, and improving the heat exchange efficiency; the moving directions of the heat storage bodies 241 in the four heat storage groups 24 are perpendicular. In the initial state, the heat storage bodies 241 are in a fitting state. As the heat storage progresses, the inner heat storage bodies 241 are pushed inward under the action of the first temperature-sensitive piece 222 and the second temperature-sensitive piece 223 on the outside, causing the heat storage bodies 241 to slide along the sliding groove, increasing the heat exchange area in the middle, and improving the heat exchange efficiency.

[0055] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. An RTO combustion furnace for waste gas treatment with heat recovery function, characterized in that: The RTO combustion furnace comprises an induced draft device (1), a combustion device (2), an auxiliary device (3) and an exhaust device (4); the induced draft device (1) and the combustion device (2) are connected by a pipeline, the auxiliary device (3) and the combustion device (2) are connected by a pipeline, the exhaust device (4) and the combustion device (2) are connected, and the combustion device (2) is used to adjust the heat recovery efficiency; The combustion device (2) comprises a heat storage group (24) and an adjustment component (22); the heat storage group (24) comprises a plurality of heat storage bodies (241); and the distance between adjacent heat storage bodies (241) is adjusted by the adjustment component (22); The regulating component (22) comprises a first temperature sensing piece (222) and a second temperature sensing piece (223); a mounting groove (2412) is provided on the inner side of the heat storage body (241); the first temperature sensing piece (222) and the second temperature sensing piece (223) are placed in the mounting groove (2412); the first temperature sensing piece (222) and the second temperature sensing piece (223) are fastened to each other; both sides of the first temperature sensing piece (222) and the second temperature sensing piece (223) are fastened to the wall surface of the mounting groove (2412) respectively; the first temperature sensing piece (222) is located on the outer side of the second temperature sensing piece (223); and the thermal expansion coefficient of the first temperature sensing piece (222) is greater than the thermal expansion coefficient of the second temperature sensing piece (223); Initially: the first temperature sensing sheet (222) and the second temperature sensing sheet (223) are arranged horizontally, the outer side of the first temperature sensing sheet (222) is in contact with the adjacent heat storage body (241), and the side edges of the adjacent heat storage body (241) are in contact; During adjustment: the first temperature sensing piece (222) and the second temperature sensing piece (223) are arranged in an arc shape, and a flow gap is provided between adjacent heat storage bodies (241).

2. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 1, characterized in that: The air induction device (1) comprises an air inlet pipe (11), an RTO fan (13) and a lifting pipe (14); the air inlet pipe (11), the RTO fan (13) and the lifting pipe (14) are connected in sequence; and the lifting pipe (14) is connected to a pipeline of the combustion device (2); The combustion device (2) comprises a box (21), the box (21) is provided with an air inlet (211), the outlet of the riser (14) is connected to the air inlet (211) through a pipeline, a heat storage chamber (213) is provided on the box (21), the exhaust device (4) is connected to the heat storage chamber (213), a purge chamber (212) is provided between the air inlet (211) and the heat storage chamber (213), the auxiliary device (3) is connected to the heat storage chamber (213) and the purge chamber (212), respectively, and the heat storage group (24) is placed in the heat storage chamber (213).

3. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 2, characterized in that: The regulating assembly (22) comprises a bracket (221), the bracket (221) being firmly connected to the wall of the heat storage chamber (213), and the heat storage body (241) is provided with a plurality of through holes (2411), the plurality of through holes (2411) being arranged vertically.

4. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 3 is characterized in that: The heat storage groups (24) are provided with four groups, and a "cross flow channel" is formed between the four groups of the heat storage groups (24). The heat storage bodies (241) in two adjacent groups of the heat storage groups (24) move in perpendicular directions. The bracket (221) is provided with a slide groove. The outermost heat storage bodies (241) of the same group are tightly connected to the slide groove, and the remaining heat storage bodies (241) are slidably connected to the slide groove.

5. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 4, characterized in that: The combustion device (2) further comprises a cut-off component (23); an auxiliary exhaust port (215) is provided on the housing (21); the auxiliary exhaust port (215) is located below the purge chamber (212); the auxiliary exhaust port (215) and the purge chamber (212) are connected by a pipeline; the air inlet (211) and the auxiliary exhaust port (215) are respectively provided with a cut-off component (23); the cut-off component (23) comprises a blocking plate (231), a valve plate (232) and a cut-off motor (233); the cut-off motor (233) is fastened to the housing (21); the output end of the cut-off motor (233) is fastened to the valve plate (232); a through groove is provided on the valve plate (232); the two blocking plates (231) are respectively fastened to the wall of the air inlet (211) and the auxiliary exhaust port (215); the blocking plates (231) and the through groove are adapted to each other.

6. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 5, characterized in that: The auxiliary device (3) comprises a purge fan (31), a purge pipe (33) and a combustion-supporting fan (34); an air induced draft pipe (32) is provided at the output end of the purge fan (31); the air induced draft pipe (32) is connected to the purge pipe (33); one end of the purge pipe (33) is inserted into the purge chamber (212); a plurality of air holes are provided around the purge pipe (33); and the combustion-supporting fan (34) is connected to the heat storage chamber (213) through a pipeline.

7. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 6, characterized in that: The exhaust device (4) comprises an exhaust pipe (41), a guide pipe (42), an air mixing box (43) and a chimney (44); a main exhaust port (214) is provided on one side of the box body (21); the heat storage chamber (213) is connected to the exhaust pipe (41) via the main exhaust port (214); the auxiliary exhaust port (215) is connected to the air mixing box (43) via the guide pipe (42); the end of the exhaust pipe (41) is connected to the air mixing box (43); and the outlet of the air mixing box (43) is connected to the chimney (44).

8. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 7, characterized in that: The exhaust device (4) further comprises a purification pipe (45), the inlet of the purification pipe (45) being connected to the chimney (44), and the outlet of the purification pipe (45) being directed toward the connection point between the RTO blower (13) and the riser (14).

9. The RTO combustion furnace for waste gas treatment with heat recovery function according to claim 8, characterized in that: The air inducing device (1) further comprises a fresh air duct (12), wherein the fresh air duct (12) is connected to the air inlet duct (11).

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