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

Abstract

The invention discloses an RTO combustion furnace for waste gas treatment with a heat recovery function, and relates to the technical field of combustion furnaces. The RTO combustion furnace comprises an induced draft device, a combustion device, an auxiliary device and an exhaust device. When the waste gas is burned, a large amount of heat will be generated. The induced draft device is used to guide the waste gas into the combustion device, and fuel gas is supplied through the auxiliary device to assist the waste gas in combustion, and part of the generated heat is intercepted to facilitate preheating of the waste gas entering next time. The gas after cooling is discharged from the combustion device through the exhaust device, which is convenient for continuous combustion. When the combustion device is burning the waste gas, the heat exchange area can be adjusted according to the temperature of the waste gas after combustion, thereby automatically adjusting the heat recovery efficiency.

Description

Technical Field

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

[0002] RTO refers to a regenerator thermal oxidizer, which is mainly used for treating organic waste gas. 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 heats up the subsequent waste gas, thereby reducing the combustion energy consumption. However, the waste gas transported is often generated in the previous processing process, and the gas delivery volume is fluctuating. When conventional heat storage bodies are used for heat exchange, a fixed heat exchange stroke is used, which easily leads to the failure to meet the recovery of combustion heat within a fixed time, resulting in heat waste and, to a certain extent, increasing the combustion energy consumption.

[0004] In addition, due to the high temperature of exhaust gas combustion, conventional mechanical equipment is affected by temperature and cannot assist in heat energy recovery during the combustion process. Summary of the invention

[0005] The object 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 object, the present invention provides the following technical solutions: The RTO combustion furnace includes an induced draft device, a combustion device, an auxiliary device and an exhaust device. The induced draft device and the combustion device are connected through a pipeline, the auxiliary device and the combustion device are connected through a pipeline, the exhaust device and the combustion device are connected, and the combustion device is used to adjust the heat recovery efficiency.

[0007] When the exhaust gas is burned, a large amount of heat will be generated. The induced draft device is used to guide the exhaust gas into the combustion device, and the fuel gas is supplied through the auxiliary device to assist the exhaust gas to burn, and part of the generated heat is retained to facilitate preheating of the exhaust gas entering next time. The cooled gas is discharged from the combustion device through the exhaust device to facilitate continuous combustion. When the combustion device is burning the exhaust gas, it can adjust the heat exchange area according to the temperature of the exhaust gas after combustion, thereby automatically adjusting the heat recovery efficiency.

[0008] Furthermore, the air induction 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, and the riser pipe is connected to the combustion device pipeline; The combustion device includes a box body, a heat storage group and an adjusting component. An air inlet is arranged on the box body. The outlet of the riser is connected to the air inlet pipeline. A heat storage chamber is arranged on the box body. The exhaust device is connected to the heat storage chamber. A purge chamber is arranged between the air inlet and the heat storage chamber. The auxiliary device is connected to the heat storage chamber and the purge chamber respectively. The heat storage group is placed in the heat storage chamber. The heat storage group includes a plurality of heat storage bodies. The distance between adjacent heat storage bodies is adjusted by the adjusting component.

[0009] The air inlet pipe is used to connect the exhaust gas source. The exhaust gas is pumped into the combustion device through the lifting pipe through the RTO fan, and the exhaust gas is guided into the heat storage chamber through the air inlet. The box provides combustion space through the heat storage chamber, and has a built-in heat storage body. The heat generated after the exhaust gas is burned 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 connected to the heat exchange can be controlled to improve the heat exchange efficiency. A valve is set at the connection between the exhaust device and the heat storage chamber to control the flow channel. When combustion is in progress, it is kept in a closed state to facilitate heat storage by the heat storage group. After the heat storage is completed, when the subsequent exhaust gas is inhaled, the heat storage body is used to preheat the newly incoming exhaust gas, thereby recovering heat and reducing energy consumption.

[0010] Further, the adjustment component includes a bracket, a first temperature sensing piece and a second temperature sensing piece, the bracket is fastened to the wall of the heat storage chamber, a plurality of through holes are provided on the heat storage body, the plurality of through holes are arranged vertically, a mounting groove is provided inside the heat storage body, the first temperature sensing piece and the second temperature sensing piece are placed in the mounting groove, the first temperature sensing piece and the second temperature sensing piece are fastened to the wall of the mounting groove, the first temperature sensing piece and the second temperature sensing piece are fastened to the wall of the mounting groove on both sides, the first temperature sensing piece is located outside the second temperature sensing piece, and the thermal expansion coefficient of the first temperature sensing piece is greater than the thermal expansion coefficient of the second temperature sensing piece; Initially: the first temperature sensing sheet and the second temperature sensing sheet are arranged horizontally, the outer side of the first temperature sensing sheet contacts the adjacent heat storage body, and the side edges of the adjacent heat storage bodies contact each other; During adjustment: the first temperature sensing piece and the second temperature sensing piece are arranged in an arc shape, and a flow gap is provided between adjacent heat storage bodies.

[0011] The bracket is fixed to the wall of the heat storage chamber, and the heat storage group is placed on the bracket. Through the split setting, in the initial state, the heat storage bodies are attached to each other, and the first temperature sensing piece and the second temperature sensing piece are attached to the installation groove. When the exhaust gas burns, the burning gas diffuses toward the through hole on the heat storage body. The heat storage body is made of ceramic material. When the high-temperature gas flows through, the heat storage body is heated, and the heat storage body heats up and transfers heat to the first temperature sensing piece and the second temperature sensing piece that are fastened together. The first temperature sensing piece and the second temperature sensing piece are deformed by heat. Since the first temperature sensing piece and the second temperature sensing piece are fixed at both ends and limited close to one side of the installation groove, the deformation direction is away from one side of the installation groove, and the middle is a convex arc, which pushes the adjacent heat storage body to move, so that the distance between the two adjacent heat storage bodies is increased, forming a flow gap, increasing the heat exchange area between the heat storage body and the hot air flow, and improving the heat exchange efficiency.

[0012] Furthermore, four heat storage groups are provided, and a "cross flow channel" is formed between the four heat storage groups. The movement directions of the heat storage bodies in two adjacent heat storage groups are perpendicular. A slide groove is provided on the bracket. The outermost heat storage body in the same group is firmly connected to the slide groove, and the remaining heat storage bodies are slidably connected to the slide groove.

[0013] Four heat storage groups are provided and arranged on a bracket. A cross flow channel is formed in the middle for introducing exhaust gas. The heat storage bodies in the four heat storage groups move in a vertical direction. In the initial state, the heat storage bodies are in a fitted state. As heat storage proceeds, the inner heat storage bodies are pushed inward by the first and second temperature sensing sheets on the outside, causing the heat storage bodies to slide along the slide groove, thereby increasing the heat exchange area in the middle and improving the heat exchange efficiency.

[0014] Furthermore, the combustion device also includes a cut-off component, an auxiliary exhaust port is provided on the box body, the auxiliary exhaust port is located below the purge chamber, the auxiliary exhaust port and the purge chamber pipeline are connected, the air inlet and the auxiliary exhaust port are respectively provided with a cut-off component, the cut-off component includes a blocking plate, a valve plate and a cut-off motor, the cut-off motor and the box body are fastened together, the output end of the cut-off motor and the valve plate are fastened together, a through groove is provided on the valve plate, two blocking plates are respectively fastened together with the walls of the air inlet and the auxiliary exhaust port, and the blocking plates and the through grooves are adapted to each other.

[0015] By setting a cut-off component, when exhaust gas is intaken, the cut-off component in the air inlet is in an open state, that is, the cut-off motor drives the valve plate to rotate an angle so that the through groove of the valve plate and the plugging plate do not overlap, and the exhaust gas enters the air inlet from the lifting pipe and enters the heat storage chamber through the purge chamber. At this time, the cut-off component in the auxiliary exhaust port is in a cut-off state, that is, the cut-off motor drives the valve plate to rotate so that the through groove of the valve plate and the plugging plate overlap, thereby avoiding gas leakage and affecting the combustion quality.

[0016] Furthermore, the auxiliary device includes a purge fan, a purge pipe and a combustion-supporting fan. An induced draft duct is provided at the output end of the purge fan. The induced draft duct is connected to the purge pipe. One end of the purge pipe is inserted into the purge cavity. A plurality of air holes are provided around the purge pipe. The combustion-supporting fan is connected to the heat storage chamber pipeline.

[0017] By setting up a purge fan, after the combustion and heat storage are completed, the purge fan supplies air to the purge pipe through the induced draft pipe. The part of the purge pipe inserted into the purge cavity is provided with a plurality of air holes around the circumference. The internal chamber of the box and the heat storage group are automatically cleaned through the air holes to prevent impurities from adhering and affecting the combustion and heat storage quality. During combustion, the combustion-supporting fan supplies gas to the heat storage chamber to assist in the combustion of exhaust gas.

[0018] As an optimization, the exhaust device includes an exhaust pipe, a guide pipe, a mixed air box and a chimney. A main exhaust port is provided on one side of the box body. The heat storage chamber is connected to the exhaust pipe through the main exhaust port, the auxiliary exhaust port is connected to the mixed air box through the guide pipe, the end of the exhaust pipe is connected to the mixed air box, and the outlet of the mixed air box is connected to the chimney. A main exhaust port is provided on one side of the box body to discharge the high-temperature gas after the combustion of the exhaust gas, send it into the mixed air box through the exhaust pipe, and discharge it through the chimney. When purging, the cut-off component in the auxiliary exhaust port is in an open state, and the purged gas flows out from the auxiliary exhaust port, enters the mixed air box through the guide pipe, and is finally discharged through the chimney.

[0019] As an optimization, the exhaust device also includes a purification pipe, the inlet of the purification pipe is connected to the chimney, and the outlet of the purification pipe is toward the connection point between the RTO fan and the riser. By setting the purification pipe, the purge gas discharged from the chimney is intercepted, and the flow path is switched by setting a valve. An activated carbon adsorbent is set in the middle of the purification pipe to purify the purge gas. The purified gas flows back to the outlet of the RTO fan and is mixed with the exhaust gas to enter the heat storage chamber for combustion.

[0020] As an optimization, the draft device further comprises a fresh air duct, which is connected to the air inlet duct. By setting the fresh air duct, air enters, which facilitates combustion.

[0021] Compared with the prior art, the invention has the following beneficial effects: the heat storage group includes a plurality of heat storage bodies, and by changing the distance between adjacent heat storage bodies, the number of heat storage bodies connected to the heat exchange can be controlled to improve the heat exchange efficiency; the heat storage body is used to preheat the newly-incoming exhaust gas, thereby recovering the heat and reducing the energy consumption; when the exhaust gas is burned, the burning gas diffuses toward the through holes on the heat storage body, and the heat storage body is made of ceramic material. When the high-temperature gas flows through, the heat storage body is heated, and the heat storage body is heated, and the heat is transferred to the first temperature-sensitive plate and the second temperature-sensitive plate which are fastened together, and the first temperature-sensitive plate and the second temperature-sensitive plate are deformed by the heat. The temperature plate is fixed at both ends and limited close to one side of the installation groove. The deformation direction is away from the side of the installation groove, and the middle is in a convex arc shape, which pushes the adjacent heat storage body to move, so that the distance between the two adjacent heat storage bodies is increased, forming a flow gap, increasing the heat exchange area between the heat storage body and the hot air flow, and improving the heat exchange efficiency; the movement direction of the heat storage body in the four heat storage groups is vertical, and the heat storage body is in a fitted state in the initial state. As the heat storage proceeds, the inner layer of the heat storage body is pushed inward by the action of the first and second temperature sensing plates on the outside, so that the heat storage body slides along the slide groove, increasing the heat exchange area in the middle and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the exhaust gas supply of the present invention; Figure 3 It is a schematic diagram of the exhaust gas intake treatment of the present invention; Figure 4 It is a schematic diagram of the purge gas flow path of the present invention; Figure 5 It is a schematic diagram of the structure of the heat storage group of the present invention; Figure 6 It is a schematic diagram of the movement direction of the heat storage body of the present invention; Figure 7 It is a schematic diagram of the heat storage body structure of the present invention.

[0023] In the figure: 1. induced draft device; 11. air inlet pipe; 12. fresh air pipe; 13. RTO fan; 14. lifting pipe; 2. combustion device; 21. box; 211. air inlet; 212. purge chamber; 213. heat storage chamber; 214. main exhaust port; 215. auxiliary exhaust port; 22. adjustment component; 221. bracket; 222. first temperature sensing plate; 223. second temperature sensing plate; 23. cut-off group 1. Parts; 231. Blocking plate; 232. Valve plate; 233. Cut-off motor; 24. Heat storage group; 241. Heat storage body; 2411. Through hole; 2412. Mounting slot; 3. Auxiliary device; 31. Purge fan; 32. Air duct; 33. Purge pipe; 34. Combustion-supporting fan; 4. Exhaust device; 41. Discharge pipe; 42. Guide pipe; 43. Mixing box; 44. Chimney; 45. Purification pipe. DETAILED DESCRIPTION

[0024] 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.

[0025] Example: Figure 1-Figure 7 As shown, the present invention provides a technical solution of an RTO combustion furnace for waste gas treatment with a heat recovery function.

[0026] The RTO combustion furnace includes an induced draft device 1, a combustion device 2, an auxiliary device 3 and an exhaust device 4. The induced draft 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.

[0027] When the exhaust gas is burned, a large amount of heat will be generated. The induced draft device 1 is used to guide the exhaust gas into the combustion device 2, and the auxiliary device 3 is used to supply fuel gas to assist the exhaust gas in combustion, and to intercept part of the generated heat, so as to preheat the exhaust gas that enters next time. The cooled gas is discharged from the combustion device 2 through the exhaust device 4, so as to facilitate continuous combustion. When the combustion device 2 is burning the exhaust gas, the heat exchange area can be adjusted according to the temperature of the exhaust gas after combustion, so as to automatically adjust the heat recovery efficiency.

[0028] Further, the induced draft device 1 includes an air inlet pipe 11, an RTO fan 13 and a riser pipe 14, the air inlet pipe 11, the RTO fan 13 and the riser pipe 14 are connected in sequence, and the riser pipe 14 is connected to the pipeline of the combustion device 2; The combustion device 2 includes a box body 21, a heat storage group 24 and an adjustment component 22. An air inlet 211 is provided on the box body 21. 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 body 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. The heat storage group 24 is placed in the heat storage chamber 213. The heat storage group 24 includes a plurality of heat storage bodies 241. The distance between adjacent heat storage bodies 241 is adjusted by the adjustment component 22.

[0029] The air inlet pipe 11 is used to connect the exhaust gas source. The exhaust gas is pumped into the combustion device 2 through the lifting pipe 14 through the RTO fan 13, and the exhaust gas is guided through the air inlet 211 to enter the heat storage chamber 213. The box body 21 provides a combustion space through the heat storage chamber 213, and has a built-in heat storage body 241. The heat generated after the exhaust gas is burned 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 connected to the heat exchange can be controlled to improve the heat exchange efficiency. A valve is set at the connection between the exhaust device 4 and the heat storage chamber 213 to control the flow channel. When combustion is in progress, it is kept in a closed state to facilitate the heat storage group 24 to store heat. After the heat storage is completed, when the subsequent exhaust gas is inhaled, the heat storage body 241 is used to preheat the newly incoming exhaust gas, thereby recovering heat and reducing energy consumption.

[0030] Further, the adjustment component 22 includes a bracket 221, a first temperature sensing piece 222 and a second temperature sensing piece 223. The bracket 221 is fastened to the wall of the heat storage chamber 213. The heat storage body 241 is provided with a plurality of through holes 2411, and the plurality of through holes 2411 are arranged vertically. The inner side of the heat storage body 241 is provided with a mounting groove 2412. 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 of the mounting groove 2412 respectively. The first temperature sensing piece 222 is located outside the second temperature sensing piece 223. 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 piece 222 and the second temperature sensing piece 223 are arranged horizontally, the outer side of the first temperature sensing piece 222 contacts the adjacent heat storage body 241, and the side edges of the adjacent heat storage body 241 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 .

[0031] The heat storage chamber 213 is fixed to the bracket 221, and the heat storage group 24 is placed on the bracket 221. In the initial state, the heat storage bodies 241 are attached to each other, and the first temperature sensing piece 222 and the second temperature sensing piece 223 are attached to the mounting groove 2412. When the exhaust gas burns, the burning gas diffuses toward the through hole 2411 on the heat storage body 241. The heat storage body 241 is made of ceramic material. When the high-temperature gas flows through, the heat storage body 241 is heated, and the heat storage body 241 is heated, and the first temperature sensing piece 222 and the second temperature sensing piece 223 are attached to the mounting groove 2412. The temperature plate 222 and the second temperature-sensitive plate 223 transfer heat, and the first temperature-sensitive plate 222 and the second temperature-sensitive plate 223 are deformed by heat. Since the first temperature-sensitive plate 222 and the second temperature-sensitive plate 223 are fixed at both ends and limited close to the side of the installation groove 2412, the deformation direction is away from the side of the installation groove 2412, and the middle is a convex arc, which pushes the adjacent heat storage body 241 to move, so that the distance between the two adjacent heat storage bodies 241 is increased, forming a flow gap, increasing the heat exchange area between the heat storage body 241 and the hot air flow, and improving the heat exchange efficiency.

[0032] Furthermore, there are four heat storage groups 24, and a "cross flow channel" is formed between the four heat storage groups 24. The movement directions of the heat storage bodies 241 in two adjacent heat storage groups 24 are perpendicular. A slide groove is provided on the bracket 221. The outermost heat storage body 241 of the same group is firmly connected to the slide groove, and the remaining heat storage bodies 241 are slidably connected to the slide groove.

[0033] Four heat storage groups 24 are provided and arranged on the bracket 221. A cross flow channel is formed in the middle for introducing exhaust gas. The heat storage bodies 241 in the four heat storage groups 24 move in a vertical direction. In the initial state, the heat storage bodies 241 are in a fitted state. As heat storage proceeds, the inner heat storage bodies 241 are pushed inward by the first temperature-sensing sheet 222 and the second temperature-sensing sheet 223 on the outside, so that the heat storage bodies 241 slide along the slide groove, thereby increasing the heat exchange area in the middle and improving the heat exchange efficiency.

[0034] Furthermore, the combustion device 2 also includes a cut-off component 23. An auxiliary exhaust port 215 is provided on the box body 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 pipelines. The air inlet 211 and the auxiliary exhaust port 215 are respectively provided with a cut-off component 23. The cut-off component 23 includes a blocking plate 231, a valve plate 232 and a cut-off motor 233. The cut-off motor 233 is fastened to the box body 21, and 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 walls of the air inlet 211 and the auxiliary exhaust port 215, and the blocking plates 231 and the through groove are adapted to each other.

[0035] By setting the cut-off component 23, when the exhaust gas is intaken, the cut-off component 23 in the air inlet 211 is in an open state, that is, the cut-off motor 233 drives the valve plate 232 to rotate an angle so that the through groove of the valve plate 232 and the plugging plate 231 do not overlap, and the exhaust gas enters the air inlet 211 from the lifting pipe 14, and enters the heat storage chamber 213 through the purge chamber 212. At this time, the cut-off component 23 in the auxiliary exhaust port 215 is in a cut-off state, that is, the cut-off motor 233 drives the valve plate 232 to rotate, so that the through groove of the valve plate 232 and the plugging plate 231 overlap, thereby avoiding gas leakage and affecting the combustion quality.

[0036] Furthermore, 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 induced draft duct 32, the induced draft duct 32 is connected to the purge pipe 33, one end of the purge pipe 33 is inserted into the purge chamber 212, the purge pipe 33 is circumferentially provided with a plurality of air holes, and the combustion-supporting fan 34 is connected to the heat storage chamber 213 by a pipeline.

[0037] By setting the purge fan 31, after the combustion and heat storage are completed, the purge fan 31 supplies air to the purge pipe 33 through the induced draft pipe 32. The purge pipe 33 is inserted into the purge chamber 212 and a plurality of air holes are arranged around the circumference. The internal chamber of the box 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. During combustion, the combustion-supporting fan 34 supplies fuel gas to the heat storage chamber 213 to assist in the combustion of exhaust gas.

[0038] As an optimization, the exhaust device 4 includes an exhaust pipe 41, a guide pipe 42, a mixed air 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 through the main exhaust port 214, and the auxiliary exhaust port 215 is connected to the mixed air box 43 through the guide pipe 42. The end of the exhaust pipe 41 is connected to the mixed air box 43, and the outlet of the mixed air box 43 is connected to the chimney 44. A main exhaust port 214 is provided on one side of the box body 21, which is used to discharge the high-temperature gas after the combustion of the exhaust gas, and send it into the mixed air box 43 through the exhaust pipe 41, and discharge it through the chimney 44. When purging, the cut-off component 23 in the auxiliary exhaust port 215 is in an open state, and the purged gas flows out from the auxiliary exhaust port 215, enters the mixed air box 43 through the guide pipe 42, and is finally discharged through the chimney 44.

[0039] As an optimization, the exhaust device 4 also includes a purification pipe 45, the inlet of the purification pipe 45 is connected to the chimney 44, and the outlet of the purification pipe 45 is toward the connection point 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, and the flow path is switched by setting a valve. An activated carbon adsorbent is set 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 exhaust gas to enter the heat storage chamber for combustion.

[0040] As an optimization, the air induction device 1 further includes a fresh air pipe 12, which is connected to the air inlet pipe 11. By providing the fresh air pipe 12, air enters, which facilitates combustion.

[0041] 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 connected to the heat exchange can be controlled to improve the heat exchange efficiency; the heat storage body 241 is used to preheat the newly-incoming exhaust gas, thereby recovering heat and reducing energy consumption; when the exhaust gas burns, the burning gas diffuses toward the through hole 2411 on the heat storage body 241. The heat storage body 241 is made of ceramic material. When the high-temperature gas flows through, the heat storage body 241 is heated, and the heat storage body 241 is heated, and heat is transferred to the first temperature sensing piece 222 and the second temperature sensing piece 223 that are fastened together. The first temperature sensing piece 222 and the second temperature sensing piece 223 are deformed by heat. 223 is fixed at both ends and limited near one side of the mounting groove 2412. The deformation direction is away from the side of the mounting groove 2412, and the middle is in a convex arc shape, which pushes the adjacent heat storage body 241 to move, so that the distance between the two adjacent heat storage bodies 241 is increased, forming a flow gap, increasing the heat exchange area between the heat storage body 241 and the hot air flow, and improving the heat exchange efficiency; the movement direction of the heat storage body 241 in the four heat storage groups 24 is vertical, and the heat storage body 241 is in a fitted state in the initial state. As the heat storage proceeds, the inner layer of the heat storage body 241 is 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 heat storage body 241 slides along the slide groove, increasing the heat exchange area in the middle and improving the heat exchange efficiency.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

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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