Heat accumulating type oxidation device for VOCS waste gas treatment and working method of heat accumulating type oxidation device

Abstract

The invention discloses a heat storage type oxidation device for VOCS waste gas treatment and a working method thereof.The heat storage type oxidation device comprises a working support, a circulating furnace is installed on the working support and comprises a supporting rod, and the supporting rod is sequentially sleeved with an inner heat insulation sleeve, a heat storage cylinder and an outer heat insulation sleeve from inside to outside in a coaxial structure; a plurality of inner partition plates are installed on the periphery of the inner heat insulation sleeve, a plurality of outer partition plates are installed on the inner periphery of the outer heat insulation sleeve, the outer partition plates and the inner partition plates are in one-to-one correspondence, a first guide plate and a first partition plate are arranged between every two adjacent inner partition plates, and a second guide plate and a second partition plate are arranged between every two adjacent outer partition plates. The first guide plates and the first partition plates between the adjacent inner partition plates are evenly arranged in a staggered mode, the first guide plates correspond to the second partition plates, the first partition plates correspond to the second guide plates, a waste gas supplementing pipe is arranged on one side of the outer heat insulation sleeve, and an internal combustion furnace is arranged on the other side of the outer heat insulation sleeve. And the heat is more efficiently retained on the heat storage cylinder and the waste gas is preheated and heated.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, in particular to a regenerative thermal oxidation device for treating VOCS waste gas and a working method thereof. Background Art

[0002] RTO (Regenerative Thermal Oxidizer) waste gas treatment technology is an efficient method for treating organic waste gas. Its working process is divided into two stages: intake stage: organic waste gas enters a regenerator, is preheated and then enters the combustion chamber, where it is heated at high temperature (generally 760℃). 850℃), the organic matter in the exhaust gas is oxidized and decomposed into carbon dioxide and water. The high-temperature gas after combustion enters another heat storage chamber and transfers heat to the heat storage body, causing the heat storage body to heat up, while the high-temperature gas itself is discharged after its temperature drops. By switching the switching valve, the two heat storage chambers take in air alternately, and the two stages are continuously alternated and circulated to achieve the purpose of continuous exhaust gas treatment.

[0003] The application document with publication number CN118935421A discloses an RTO exhaust gas treatment device and a treatment method thereof, which includes a combustion chamber, and two interfaces are symmetrically provided at the bottom of the combustion chamber for installing a ceramic preheater; a Karman vortex street combustion assembly with a laterally adjustable position is installed in the middle of the combustion chamber, which is used to form a Karman vortex street vortex flow from the exhaust gas for combustion; two liftable push flow assemblies are installed inside the combustion chamber on both sides of the Karman vortex street combustion assembly, which are used to push the upper exhaust gas downward, and the exhaust gas is sent over the bottom of the push flow assembly in the direction of the Karman vortex street combustion assembly; two combustion stoves are fixedly installed inside the combustion chamber directly above the two interfaces.

[0004] Based on the above patents and prior art, the following questions are raised: Problem 1: Because the conversion needs to be done through a valve, the heat exchange efficiency is low and the heat loss is large; Problem 2: Because the shape of the air duct changes suddenly at multiple locations, the heat storage area and heat exchange area are unevenly distributed, which easily leads to exhaust gas residue and adhesion; Question 3: Because the heat exchange efficiency cannot reach the best, the exhaust gas treatment efficiency is low and the working efficiency is low. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems and shortcomings and provide a regenerative thermal oxidation device for VOCS waste gas treatment, thereby improving the overall working efficiency.

[0006] The present invention solves at least one of the following technical problems: (1) The heat exchange efficiency is low and the heat loss is large; (2) The heat storage area and heat exchange area are unevenly distributed, which easily leads to waste gas residue and adhesion; (3) The waste gas treatment efficiency is low and the work efficiency is low.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A thermal storage oxidation device for VOCS waste gas treatment, including a working bracket, a circulating furnace is installed on the working bracket, the circulating furnace includes a support rod, an inner insulation sleeve, a heat storage cylinder and an outer insulation sleeve are sequentially sleeved on the support rod in a coaxial structure from the inside to the outside, a plurality of inner partition plates are installed on the outer periphery of the inner insulation sleeve, a plurality of outer partition plates are installed on the inner periphery of the outer insulation sleeve, the outer partition plates and the inner partition plates correspond to each other one by one, a first guide plate and a first partition plate are provided between adjacent inner partition plates, a second guide plate and a second partition plate are provided between adjacent outer partition plates, the first guide plate and the first partition plate between adjacent inner partition plates are evenly staggered, the first guide plate and the second partition plate and the first partition plate and the second guide plate correspond to each other, an exhaust gas replenishing pipe is provided on one side of the outer insulation sleeve and an internal combustion furnace is provided on the other side, an air intake pipe is provided on one side of the top of the outer insulation sleeve and a waste heat recovery device is provided on the other side of the top, and an igniter is provided on one side of the internal combustion furnace.

[0008] As a further solution of the invention, three internal partition plates are provided, and several purge diverter pipes are connected between the air intake pipe and the outer insulation sleeve. An air pipe head is provided at one end of the air intake pipe, and several pairs of purge exhaust pipes and preheating diverter pipes are connected between the exhaust gas supply pipe and the outer insulation sleeve. Several pairs of preheating exhaust pipes and heat storage diverter pipes are connected between the internal combustion furnace and the outer insulation sleeve. The outer insulation sleeve, the exhaust gas supply pipe and the internal combustion furnace are all insulated from the outside world by an insulation layer.

[0009] As a further solution of the invention, each purge diverter pipe, purge exhaust pipe, preheating diverter pipe, preheating exhaust pipe, heat storage diverter pipe and heat storage exhaust pipe are evenly distributed at equal intervals, and the purge diverter pipe and the heat storage exhaust pipe, the purge exhaust pipe and the preheating diverter pipe, and the preheating exhaust pipe and the heat storage diverter pipe are all symmetrical about the outer partition plate.

[0010] As a further solution of the invention, an exhaust gas pipe head is installed at one end of the exhaust gas supply pipe for easy connection. Several ignition diversion pipes are evenly distributed at equal distances between the igniter and the internal combustion furnace. The ignition diversion pipes are connected to the side wall of the internal combustion furnace, and a gas port and a spark generator are provided in the ignition diversion pipes.

[0011] As a further solution of the invention, the internal partition plates are evenly distributed at equal angles, a first ring plate is installed at both ends of the inner insulation sleeve, a second ring plate is installed at both ends of the heat storage cylinder, and a third ring plate is installed at both ends of the outer insulation sleeve. The second ring plate is rotatably connected to the first ring plate and the third ring plate respectively, the first ring plate is fixedly connected to the first guide plate and the first partition plate, and the second ring plate is fixedly connected to the second guide plate and the second partition plate.

[0012] As a further solution of the invention, a sealing side plate is installed at one end of the support rod and the other end is fixedly connected to the working bracket. The sealing side plate cooperates with the insulation layer to provide insulation, and the sealing side plate is fixedly connected to the working bracket through the support frame.

[0013] As a further solution of the invention, the outer insulation sleeve is fixedly connected to the sealing side plate and the working bracket through the third ring plate, the inner insulation sleeve is fixedly connected to the sealing side plate and the working bracket through the first ring plate, the heat storage cylinder is slidingly connected to the sealing side plate and the working bracket through the second ring plate, and a gear and motor for driving the second ring plate to rotate are installed on one side of the working bracket.

[0014] As a further solution of the invention, the waste heat recovery device includes a heat exchange box, in which several first heat exchangers and second heat exchangers are placed. One end of the first heat exchanger is connected to a high-temperature air inlet pipe and the other end is connected to a normal-temperature exhaust pipe. One side of the heat exchange box is provided with a heat exchange water inlet pipe and an exhaust duct and the other side is provided with a heat exchange drainage pipe. The high-temperature air inlet pipe is connected to the heat storage exhaust pipe, and the normal-temperature exhaust pipe is connected to the exhaust duct.

[0015] As a further solution of the invention, the first heat exchanger and the second heat exchanger are both serpentine tubular structures, and the first heat exchangers and the second heat exchangers are evenly staggered and tightly connected to each other. One end of the second heat exchanger is connected to a water inlet diverter pipe and the other end is connected to a drainage diverter pipe. The water inlet diverter pipe is connected to the heat exchange water inlet pipe, and the drainage diverter pipe is connected to the heat exchange drainage pipe.

[0016] A method for operating a regenerative thermal oxidation device for treating VOCS waste gas comprises the following steps: Step 1: Fill the waste heat recovery device with water, ignite it in the internal combustion furnace, and continuously burn it through the external gas introduced as fuel. Introduce fresh air into the air intake pipe and fully burn it together with the gas as fuel to form a high-temperature airflow, which stores heat in the heat storage cylinder. The cylinder wall absorbs heat and forms a high-temperature section, and the heat storage cylinder is continuously rotated. Step 2: When the high-temperature section of the heat storage cylinder moves to the outer insulation sleeve corresponding to the exhaust gas supply pipe, exhaust gas is input into the exhaust gas supply pipe, and then the mixed gas encounters fire in the internal combustion furnace and is fully burned; Step 3: No external gas is introduced. The airflow after the combustion of the mixed gas replaces the airflow after the combustion of the natural gas and enters the outer insulation sleeve again from the internal combustion furnace to perform heat exchange again to store heat; Step 4: After heat storage is completed, the exhaust gas is discharged into the high-temperature intake pipe through the heat storage exhaust pipe and enters each first heat exchanger for sufficient heat exchange.

[0017] Beneficial effects of the present invention: (1) By continuously rotating the heat storage cylinder, the section with the highest temperature in the heat storage section is continuously moved toward the preheating section, ensuring that the maximum temperature difference between the mixed gas and the heat storage cylinder is continuously maintained and the preheating efficiency is optimized. At the same time, the purging section enriches the waste gas attachments purged at the waste gas replenishment pipe, achieving the best purging effect. It can not only completely eliminate the waste gas substances attached to the heat storage cylinder, but also reduce the temperature of the heat storage cylinder section after purging to the lowest, fully absorb the heat after the mixture is burned, reduce the heat loss generated by the mixture combustion, and ensure that the heat generated by the combustion is more fully used for the preheating of the waste gas mixture; (2) Through the uniform diversion of the purge diverter pipe, the preheating diverter pipe and the heat storage diverter pipe, the air, the mixed gas and the high-temperature airflow are uniformly flowed at all places on the side wall busbar of the heat storage cylinder and the flow direction is perpendicular to the peripheral tangent, so as to achieve uniform and thorough purge, uniform and sufficient preheating and uniform and sufficient heat storage. At the end of the purge, the airflow is input into the exhaust gas replenishment pipe through the purge exhaust pipe, and the attached exhaust gas substances are mixed into the exhaust gas replenishment pipe at the same time, thereby improving the purge effect. After mixing with the exhaust gas in the exhaust gas replenishment pipe, the airflow is input into the outer insulation sleeve again through the preheating diverter pipe. By continuously moving the highest temperature section of the heat storage cylinder toward the preheating diverter pipe, the best preheating efficiency and preheating effect are ensured. During heat storage, the highest temperature section of the heat storage cylinder is continuously moved away, which is equivalent to extending the heat absorption section, thereby more efficiently retaining the heat on the heat storage cylinder and preheating the exhaust gas, further improving the exhaust gas treatment efficiency and the amount of full reaction; (3) Water is supplied to each second heat exchanger through the heat exchange water inlet pipe and the water inlet manifold, and the water flow direction is opposite to the air flow direction, so as to fully absorb the waste heat of the exhaust gas. After the heat storage is completed, the exhaust gas is discharged into the high-temperature intake pipe through the heat storage exhaust pipe and enters each first heat exchanger. The serpentine structure extends the path length, prolongs the heat exchange time, realizes sufficient heat exchange, and makes the gas temperature discharged from the exhaust duct consistent with the initial water flow temperature, achieving the best waste heat absorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A side view of the internal structure of the circulating furnace of the present invention; Figure 3 A side view of the internal structure of the outer thermal insulation sleeve of the present invention; Figure 4 A three-dimensional view of the internal structure of the circulating furnace of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of area A in the middle; Figure 6 This is a side view of the internal structure of the heat exchange box of the present invention; Figure 7 Schematic diagram of the distribution structure of the first heat exchanger and the second heat exchanger of the present invention; In the figure: 101, working support; 102, circulation furnace; 103, exhaust gas supply pipe; 104, internal combustion furnace; 105, igniter; 106, waste heat recovery device; 201, support rod; 202, inner insulation sleeve; 203, inner partition plate; 204, first ring plate; 205, first guide plate; 206, first partition plate; 207, heat storage cylinder; 208, second ring plate; 209, outer insulation sleeve; 210, outer partition plate; 211, third ring plate; 212, second guide plate; 213, second partition plate; 214, air intake pipe; 215, purge diverter pipe; 2 16. Air pipe head; 217. Purge exhaust pipe; 218. Preheating diverter pipe; 219. Preheating exhaust pipe; 220. Heat storage diverter pipe; 221. Heat storage exhaust pipe; 222. Insulation layer; 223. Exhaust pipe head; 224. Support frame; 225. Sealing side plate; 226. Ignition diverter pipe; 301. Heat exchange box; 302. First heat exchanger; 303. Second heat exchanger; 304. High-temperature air inlet pipe; 305. Normal-temperature exhaust pipe; 306. Exhaust duct; 307. Heat exchange water inlet pipe; 308. Water inlet diverter pipe; 309. Drainage diverter pipe; 310. Heat exchange drainage pipe. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1 、 3 The figure shows a regenerative thermal oxidation device for treating VOCS waste gas, comprising a working support 101, on which a circulating furnace 102 is mounted. The circulating furnace 102 comprises a support rod 201, on which an inner thermal insulation sleeve 202, a thermal storage cylinder 207, and an outer thermal insulation sleeve 209 are sheathed in a coaxial structure from the inside to the outside. See also Figure 3As shown, a plurality of inner partition plates 203 are installed on the outer periphery of the inner insulation sleeve 202. In this embodiment, three inner partition plates 203 are provided and are evenly distributed at equal angles. A plurality of outer partition plates 210 are installed on the inner periphery of the outer insulation sleeve 209. The outer partition plates 210 correspond to the inner partition plates 203 one by one. A first guide plate 205 and a first partition plate 206 are provided between adjacent inner partition plates 203. A second guide plate 212 and a second partition plate 213 are provided between adjacent outer partition plates 210. The first guide plates 205 and the first partition plates 206 between adjacent inner partition plates 203 are evenly staggered. The first guide plates 205 and the second partition plates 213 and the first partition plates 206 and the second guide plates 212 correspond to each other. See also Figure 2 、 3 As shown, an exhaust gas supply pipe 103 is provided on one side of the outer insulation sleeve 209 and an internal combustion furnace 104 is provided on the other side, an air intake pipe 214 is provided on one side of the top of the outer insulation sleeve 209 and a waste heat recovery device 106 is provided on the other side of the top, an igniter 105 is installed on one side of the internal combustion furnace 104, and an exhaust gas pipe head 223 for easy connection is installed at one end of the exhaust gas supply pipe 103. A plurality of ignition diversion pipes 226 are evenly distributed at equal distances between the igniter 105 and the internal combustion furnace 104. The ignition diversion pipes 226 are connected to the side wall of the internal combustion furnace 104, and a gas port and a spark generator are provided in the ignition diversion pipe 226. See also Figure 2-4 As shown, a plurality of purge shunt pipes 215 are connected between the air intake pipe 214 and the outer insulation sleeve 209, an air pipe head 216 is provided at one end of the air intake pipe 214, a plurality of pairs of purge exhaust pipes 217 and preheating shunt pipes 218 are connected between the exhaust gas supply pipe 103 and the outer insulation sleeve 209, a plurality of pairs of preheating exhaust pipes 219 and heat storage shunt pipes 220 are connected between the internal combustion furnace 104 and the outer insulation sleeve 209, and each purge shunt pipe 215, purge exhaust pipe 2 17. The preheating shunt pipe 218, preheating exhaust pipe 219, heat storage shunt pipe 220, and heat storage exhaust pipe 221 are all evenly spaced. The outer insulation sleeve 209, exhaust gas supply pipe 103, and internal combustion furnace 104 are all insulated from the outside world by the insulation layer 222. The purge shunt pipe 215 and heat storage exhaust pipe 221, the purge exhaust pipe 217 and preheating shunt pipe 218, and the preheating exhaust pipe 219 and heat storage shunt pipe 220 are all symmetrical about the outer partition plate 210. See also Figure 1 、 2As shown, both ends of the inner insulation sleeve 202 are installed with a first ring plate 204, both ends of the heat storage cylinder 207 are installed with a second ring plate 208, and both ends of the outer insulation sleeve 209 are installed with a third ring plate 211. The second ring plate 208 is rotatably connected to the first ring plate 204 and the third ring plate 211 respectively. The first ring plate 204 is fixedly connected to the first guide plate 205 and the first partition plate 206. The second ring plate 208 is fixedly connected to the second guide plate 212 and the second partition plate 213. One end of the support rod 201 is installed with a sealing side plate 225 and the other end is fixedly connected to the working bracket 101. The outer insulation sleeve 209 is fixedly connected to the sealing side plate 225 and the working support 101 respectively through the third ring plate 211. The inner insulation sleeve 202 is fixedly connected to the sealing side plate 225 and the working support 101 respectively through the first ring plate 204. The heat storage cylinder 207 is slidably connected to the sealing side plate 225 and the working support 101 respectively through the second ring plate 208. A gear and a motor for driving the second ring plate 208 to rotate are installed on one side of the working support 101. The sealing side plate 225 cooperates with the insulation layer 222 to provide thermal insulation, and the sealing side plate 225 is fixedly connected to the working support 101 through the support frame 224. See also Figure 1 、 3 As shown, when this embodiment is working, the honeycomb-shaped through-hole grooves on the heat storage cylinder 207 are evenly arranged along the radius of the annular cross-section, and the heat storage cylinder 207 rotates intermittently and cyclically when driven. The rotation direction of the heat storage cylinder 207 is opposite to the movement direction of the airflow in the circulation furnace 102. The airflow in this embodiment generally moves in the counterclockwise direction, and the heat storage cylinder 207 in this embodiment rotates at a uniform speed in the clockwise direction. See also Figure 1 、 3 As shown, during operation, the overall process is divided into a startup phase and a working phase. The section where the heat storage cylinder 207 is located between the air intake pipe 214 and the exhaust gas supply pipe 103 is a purge phase, the section where the heat storage cylinder 207 is located between the exhaust gas supply pipe 103 and the internal combustion furnace 104 is a preheating phase, and the section where the heat storage cylinder 207 is located between the internal combustion furnace 104 and the heat storage exhaust pipe 221 is a heat storage phase. See also Figure 1 、 3As shown, during the startup phase, the internal combustion furnace 104 is ignited simultaneously through the igniter 105 and each ignition shunt pipe 226, and the combustion is continued through the introduction of external gas as fuel, and at the same time, it is connected to the air supply equipment through the air pipe head 216, and fresh air is introduced into the air intake pipe 214, and then sent into the outer insulation sleeve 209 through the purge shunt pipe 215. The air flow is blocked by the inner partition plate 203 and the outer partition plate 210 and the pressure of the delivery, so that the air flow moves to the exhaust gas replenishment pipe 103, and then the air flow enters the outer insulation sleeve 209 again from the exhaust gas replenishment pipe 103, and is also blocked by the inner partition plate 203 and the outer partition plate 210 and the pressure of the delivery to the internal combustion furnace 104. The furnace 104 delivers airflow, which is fully burned together with the gas as fuel to form a high-temperature airflow. The high-temperature airflow enters the outer insulation sleeve 209 from the internal combustion furnace 104 again, and is again transported to the heat storage exhaust pipe 221 through the obstruction of the inner partition plate 203 and the outer partition plate 210 and the delivery pressure, thereby storing heat in the heat storage cylinder 207, so that the cylinder wall of the heat storage cylinder 207 absorbs heat and forms a high-temperature section. As the heat storage cylinder 207 continues to rotate, the high-temperature section gradually extends and moves to the exhaust gas replenishment pipe 103. When the high-temperature section of the heat storage cylinder 207 moves to the outer insulation sleeve 209 corresponding to the exhaust gas replenishment pipe 103, exhaust gas is input into the exhaust gas replenishment pipe 103, and the working stage is entered; See also Figure 3-5 As shown, during the working stage, the mixture of exhaust gas and air is heat exchanged through the high temperature section of the heat storage cylinder 207, so that the mixture is heated to a high temperature state before reaching the internal combustion furnace 104, and then the mixture encounters fire and burns in the internal combustion furnace 104 and is fully burned. At the same time, no external gas is introduced, and only the mixture is used as fuel for combustion. The airflow after the combustion of the mixture replaces the airflow after the combustion of the gas and enters the outer insulation sleeve 209 again from the internal combustion furnace 104 and undergoes heat exchange again to store heat. The airflow after the heat storage is completed is discharged into the waste heat recovery device 106 through the heat storage exhaust pipe 221, and the heat is collected again by the waste heat recovery device 106, so that the exhaust gas is fully preheated before combustion, ensuring the adequacy of the exhaust gas treatment, that is, ensuring that each exhaust gas molecule is in a condition of full reaction; See also Figure 3-5 As shown, by continuously rotating the heat storage cylinder 207, the segment with the highest temperature in the heat storage section is continuously moved toward the preheating section, ensuring that the maximum temperature difference between the mixed gas and the heat storage cylinder 207 is continuously maintained and the preheating efficiency is optimized. At the same time, the purging section enriches the waste gas attachments purged in the waste gas replenishing pipe 103, achieving the best purging effect, which can not only completely eliminate the waste gas substances attached to the heat storage cylinder 207, but also reduce the temperature of the purged segment of the heat storage cylinder 207 to the lowest level, fully absorb the heat after the combustion of the mixed gas, reduce the loss of heat generated by the combustion of the mixed gas, and ensure that the heat generated by the combustion is more fully used for preheating the waste gas mixture; See also Figure 3-5As shown, by the uniform diversion of the purge shunt pipe 215, the preheating shunt pipe 218 and the heat storage shunt pipe 220, the air, the mixed gas and the high-temperature airflow are uniformly flowed at various locations of the side wall busbar of the heat storage cylinder 207, and the flow direction is perpendicular to the peripheral tangent, so as to achieve uniform and thorough purge, uniform and sufficient preheating and uniform and sufficient heat storage. At the end of the purge, the airflow is input into the exhaust gas replenishment pipe 103 through the purge exhaust pipe 217, and the attached exhaust gas substances are mixed into the exhaust gas replenishment pipe 103 at the same time, thereby improving the purge efficiency. The result is mixed with the exhaust gas in the exhaust gas replenishment pipe 103 and then input into the outer insulation sleeve 209 again through the preheating shunt pipe 218. By continuously moving the highest temperature section of the heat storage cylinder 207 toward the preheating shunt pipe 218, the best preheating efficiency and preheating effect are ensured. During heat storage, the highest temperature section of the heat storage cylinder 207 is continuously moved away, which is equivalent to extending the heat absorption section, thereby more efficiently retaining the heat on the heat storage cylinder 207 and preheating the exhaust gas, further improving the exhaust gas treatment efficiency and the amount of sufficient reaction; See also Figure 3-5 As shown, the number of times the airflow passes through the holes of the heat storage cylinder 207 is greatly increased by the first guide plate 205, the first partition plate 206, the second guide plate 212 and the second partition plate 213, ensuring the process time of purging, preheating and heat storage, thereby improving the processing efficiency and the overall heat exchange efficiency, reducing the insufficient reaction amount of exhaust gas and the heat loss caused by untimely heat exchange, and improving the overall work efficiency.

[0022] See also Figure 1 、 6 As shown, the waste heat recovery device 106 includes a heat exchange box 301, in which a plurality of first heat exchangers 302 and second heat exchangers 303 are placed. The first heat exchangers 302 and second heat exchangers 303 are both serpentine tubular structures. The first heat exchangers 302 and second heat exchangers 303 are evenly staggered and closely connected to each other. One end of the first heat exchanger 302 is connected to a high-temperature air intake pipe 304 and the other end is connected to a normal-temperature exhaust pipe 305. The heat exchange box 30 1 is provided with a heat exchange water inlet pipe 307 and an exhaust hopper 306 on one side and a heat exchange drainage pipe 310 on the other side. The high-temperature air inlet pipe 304 is connected to the heat storage exhaust pipe 221, and the normal-temperature exhaust pipe 305 is connected to the exhaust hopper 306. One end of the second heat exchanger 303 is connected to the water inlet shunt pipe 308 and the other end is connected to the drainage shunt pipe 309. The water inlet shunt pipe 308 is connected to the heat exchange water inlet pipe 307, and the drainage shunt pipe 309 is connected to the heat exchange drainage pipe 310. See also Figure 6 、 7As shown, when this embodiment is working, water is first supplied to each second heat exchanger 303 through the heat exchange water inlet pipe 307 and the water inlet diverter pipe 308, and the water flow direction is opposite to the air flow direction, so as to fully absorb the waste heat of the exhaust gas. After the heat storage is completed, the exhaust gas is discharged into the high-temperature air inlet pipe 304 through the heat storage exhaust pipe 221 and enters each first heat exchanger 302. The serpentine structure extends the path length and the heat exchange time, thereby achieving sufficient heat exchange, and achieving the temperature of the gas discharged from the exhaust duct 306 to be consistent with the initial temperature of the water flow, thereby achieving the best waste heat absorption efficiency.

[0023] See also Figure 1-7 As shown, the working method of the VOCS waste gas treatment regenerative thermal oxidation device includes the following steps: Step 1: Ensure that the waste heat recovery device 106 is filled with low-temperature water, and then ignite it in the internal combustion furnace 104 through the igniter 105 and each ignition diversion pipe 226 at the same time, and continue to burn through the external gas introduced as fuel, and at the same time connect it with the air supply equipment through the air pipe head 216, introduce fresh air into the air intake pipe 214, and then send it into the outer insulation sleeve 209 through the purge diversion pipe 215, and the air flow moves to the exhaust gas replenishment pipe 103 through the obstruction of the inner partition plate 203 and the outer partition plate 210 and the pressure of the delivery. Then the air flow from the exhaust gas replenishment pipe 1 03 enters the outer heat-insulating sleeve 209 again, and is similarly transported to the internal combustion furnace 104 through the obstruction of the inner partition plate 203 and the outer partition plate 210 and the pressure of the delivery, and is fully burned together with the gas as fuel to form a high-temperature airflow. The high-temperature airflow enters the outer heat-insulating sleeve 209 from the internal combustion furnace 104 again, and is again transported to the heat storage exhaust pipe 221 through the obstruction of the inner partition plate 203 and the outer partition plate 210 and the pressure of the delivery, thereby storing heat in the heat storage cylinder 207, so that the cylinder wall of the heat storage cylinder 207 absorbs heat and forms a high-temperature section, and the heat storage cylinder 207 is continuously rotated; Step 2: As the heat storage cylinder 207 rotates continuously, the high-temperature section gradually extends and moves toward the exhaust gas supply pipe 103. When the high-temperature section of the heat storage cylinder 207 moves to the outer insulation sleeve 209 corresponding to the exhaust gas supply pipe 103, exhaust gas is input into the exhaust gas supply pipe 103. The mixture of exhaust gas and air undergoes heat exchange through the high-temperature section of the heat storage cylinder 207, causing the mixture to be heated to a high temperature before reaching the internal combustion furnace 104. Subsequently, the mixture encounters fire in the internal combustion furnace 104 and is fully burned. Step 3: No external gas is introduced, and only the mixed gas is burned as fuel. The airflow after the mixed gas combustion replaces the airflow after the natural gas combustion and enters the outer insulation sleeve 209 again from the internal combustion furnace 104 and performs heat exchange again to store heat. The airflow after the heat storage is completed is discharged into the waste heat recovery device 106 through the heat storage exhaust pipe 221; Step 4: Water is supplied to each second heat exchanger 303 through the heat exchange water inlet pipe 307 and the water inlet manifold 308, and the water flow direction is opposite to the air flow direction. After the heat storage is completed, the exhaust gas is discharged into the high-temperature air inlet pipe 304 through the heat storage exhaust pipe 221 and enters each first heat exchanger 302. The heat exchange is sufficient to achieve that the temperature of the gas discharged from the exhaust duct 306 is consistent with the initial temperature of the water flow.

[0024] When the present invention is in use, the staff continuously rotates the heat storage cylinder 207 so that the section with the highest temperature in the heat storage section continuously moves toward the preheating section, ensuring that the maximum temperature difference between the mixed gas and the heat storage cylinder 207 is continuously maintained and the preheating efficiency is optimized. At the same time, the purging section enriches the waste gas attachments purged in the waste gas replenishing pipe 103, achieving the best purging effect. It can not only completely eliminate the waste gas substances attached to the heat storage cylinder 207, but also reduce the temperature of the purged section of the heat storage cylinder 207 to the lowest level, fully absorb the heat after the combustion of the mixed gas, reduce the loss of heat generated by the combustion of the mixed gas, and ensure that the heat generated by the combustion is more fully used for preheating the waste gas mixture. By evenly diverting the purge shunt pipe 215, the preheating shunt pipe 218, and the heat storage shunt pipe 220, the air, the mixed gas, and the high-temperature airflow are evenly flowed at various locations on the side wall busbar of the heat storage cylinder 207, and the flow direction is perpendicular to the peripheral tangent, so as to achieve even and thorough purge, even and sufficient preheating, and even and sufficient heat storage. At the end of the purge, the airflow is input into the exhaust gas replenishment pipe 103 through the purge exhaust pipe 217, and the attached exhaust gas substances are mixed into the exhaust gas replenishment pipe 103, thereby improving the purge effect. After being mixed with the exhaust gas in the exhaust gas replenishment pipe 103, it is again input into the outer insulation sleeve 209 through the preheating shunt pipe 218. By continuously moving the highest temperature section of the heat storage cylinder 207 toward the preheating shunt pipe 218, the best preheating efficiency and preheating effect are ensured. During heat storage, the highest temperature section of the heat storage cylinder 207 is continuously moved away, which is equivalent to extending the heat absorption section, thereby more efficiently retaining heat in the heat storage cylinder 207 and preheating the exhaust gas, further improving the exhaust gas treatment efficiency and the amount of sufficient reaction; Water is supplied to each second heat exchanger 303 through the heat exchange water inlet pipe 307 and the water inlet diverter pipe 308, and the water flow direction is opposite to the air flow direction, so as to fully absorb the waste heat of the exhaust gas. After the heat storage is completed, the exhaust gas is discharged into the high-temperature air inlet pipe 304 through the heat storage exhaust pipe 221 and enters each first heat exchanger 302. The serpentine structure extends the path length and the heat exchange time to achieve sufficient heat exchange, so that the gas temperature discharged from the exhaust duct 306 is consistent with the initial water flow temperature, achieving the best waste heat absorption efficiency.

[0025] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A regenerative thermal oxidation device for treating VOCS waste gas, characterized in that: The invention comprises a working support (101), a circulating furnace (102) is installed on the working support (101), and the circulating furnace (102) comprises a support rod (201), an inner heat-insulating sleeve (202), a heat storage cylinder (207) and an outer heat-insulating sleeve (209) are sequentially sleeved on the support rod (201) from the inside to the outside in a coaxial structure, a plurality of inner partition plates (203) are installed on the outer periphery of the inner heat-insulating sleeve (202), a plurality of outer partition plates (210) are installed on the inner periphery of the outer heat-insulating sleeve (209), and the outer partition plates (211) are installed on the inner periphery of the outer heat-insulating sleeve (209). 0) and the inner partition plates (203) correspond one to one, a first guide plate (205) and a first partition plate (206) are provided between adjacent inner partition plates (203), a second guide plate (212) and a second partition plate (213) are provided between adjacent outer partition plates (210), an exhaust gas supplementary pipe (103) is provided on one side of the outer thermal insulation sleeve (209) and an internal combustion furnace (104) is provided on the other side, an air intake pipe (214) is provided on one side of the top of the outer thermal insulation sleeve (209) and a waste heat recovery device (106) is provided on the other side of the top.

2. A regenerative thermal oxidation device for treating VOCS waste gas according to claim 1, characterized in that: The first guide plates (205) and the first partition plates (206) between adjacent inner partition plates (203) are evenly staggered, the first guide plates (205) and the second partition plates (213) and the first partition plates (206) and the second guide plates (212) correspond to each other, three inner partition plates (203) are provided, a plurality of purge shunt pipes (215) are connected between the air intake pipe (214) and the outer insulation sleeve (209), and an air pipe head (216) is provided at one end of the air intake pipe (214). A plurality of pairs of purge exhaust pipes (217) and preheating shunt pipes (218) are connected between the exhaust gas supply pipe (103) and the outer insulation sleeve (209); a plurality of pairs of preheating exhaust pipes (219) and heat storage shunt pipes (220) are connected between the internal combustion furnace (104) and the outer insulation sleeve (209); the outer insulation sleeve (209), the exhaust gas supply pipe (103) and the internal combustion furnace (104) are all insulated from the outside world by an insulation layer (222); and an igniter (105) is installed on one side of the internal combustion furnace (104).

3. A regenerative thermal oxidation device for treating VOCS waste gas according to claim 2, characterized in that: Each of the purge diverter pipe (215), the purge exhaust pipe (217), the preheating diverter pipe (218), the preheating exhaust pipe (219), the heat storage diverter pipe (220), and the heat storage exhaust pipe (221) is evenly distributed at equal intervals, and the purge diverter pipe (215) and the heat storage exhaust pipe (221), the purge exhaust pipe (217) and the preheating diverter pipe (218), and the preheating exhaust pipe (219) and the heat storage diverter pipe (220) are all symmetrical with respect to the outer partition plate (210).

4. A regenerative thermal oxidation device for treating VOCS waste gas according to claim 2, characterized in that: An exhaust pipe head (223) for easy connection is installed at one end of the exhaust gas supply pipe (103). A plurality of ignition diversion pipes (226) uniformly distributed at equal intervals are provided between the igniter (105) and the internal combustion furnace (104). The ignition diversion pipes (226) are connected to the side wall of the internal combustion furnace (104). A gas port and a spark generator are provided in the ignition diversion pipes (226).

5. The regenerative thermal oxidation device for treating VOCS waste gas according to claim 1, characterized in that: Each inner partition plate (203) is evenly distributed at an equal angle, a first ring plate (204) is installed at both ends of the inner heat-insulating sleeve (202), a second ring plate (208) is installed at both ends of the heat-storage cylinder (207), and a third ring plate (211) is installed at both ends of the outer heat-insulating sleeve (209). The second ring plate (208) is rotatably connected to the first ring plate (204) and the third ring plate (211), respectively. The first ring plate (204) is fixedly connected to the first guide plate (205) and the first partition plate (206), and the second ring plate (208) is fixedly connected to the second guide plate (212) and the second partition plate (213).

6. A regenerative thermal oxidation device for treating VOCS waste gas according to claim 5, characterized in that: One end of the support rod (201) is mounted with a sealing side plate (225) and the other end is fixedly connected to the working bracket (101). The sealing side plate (225) cooperates with the heat insulation layer (222) to provide heat insulation, and the sealing side plate (225) is fixedly connected to the working bracket (101) via the support frame (224).

7. A regenerative thermal oxidation device for treating VOCS waste gas according to claim 6, characterized in that: The outer heat-insulating sleeve (209) is fixedly connected to the sealing side plate (225) and the working bracket (101) respectively through the third ring plate (211); the inner heat-insulating sleeve (202) is fixedly connected to the sealing side plate (225) and the working bracket (101) respectively through the first ring plate (204); the heat storage cylinder (207) is slidably connected to the sealing side plate (225) and the working bracket (101) respectively through the second ring plate (208); and a gear and a motor for driving the second ring plate (208) to rotate are installed on one side of the working bracket (101).

8. The regenerative thermal oxidation device for treating VOCS waste gas according to claim 3, characterized in that: The waste heat recovery device (106) comprises a heat exchange box (301), wherein a plurality of first heat exchangers (302) and second heat exchangers (303) are placed in the heat exchange box (301), one end of the first heat exchanger (302) is connected to a high-temperature air inlet pipe (304) and the other end is connected to a normal-temperature exhaust pipe (305), one side of the heat exchange box (301) is provided with a heat exchange water inlet pipe (307) and a smoke exhaust duct (306), and the other side is provided with a heat exchange drainage pipe (310), the high-temperature air inlet pipe (304) is connected to the heat storage exhaust pipe (221), and the normal-temperature exhaust pipe (305) is connected to the smoke exhaust duct (306).

9. The regenerative thermal oxidation device for treating VOCS waste gas according to claim 8, characterized in that: The first heat exchanger (302) and the second heat exchanger (303) both have a serpentine tubular structure. The first heat exchangers (302) and the second heat exchangers (303) are evenly staggered and tightly connected to each other. One end of the second heat exchanger (303) is connected to a water inlet shunt pipe (308) and the other end is connected to a drainage shunt pipe (309). The water inlet shunt pipe (308) is connected to the heat exchange water inlet pipe (307), and the drainage shunt pipe (309) is connected to the heat exchange drainage pipe (310).

10. An operating method of a regenerative thermal oxidation device for treating VOCS waste gas, applied to the regenerative thermal oxidation device for treating VOCS waste gas according to claim 9, characterized in that: The steps include: Step 1: Fill the waste heat recovery device (106) with water, ignite the internal combustion furnace (104), introduce external gas as fuel for continuous combustion, introduce fresh air into the air intake pipe (214), and fully burn it together with the gas as fuel to form a high-temperature airflow, store heat in the heat storage cylinder (207), so that the cylinder wall of the heat storage cylinder (207) absorbs heat and forms a high-temperature section, and continuously rotate the heat storage cylinder (207); Step 2: When the high-temperature section of the heat storage cylinder (207) moves to the outer heat-insulating sleeve (209) corresponding to the exhaust gas supply pipe (103), exhaust gas is input into the exhaust gas supply pipe (103), and then the mixed gas encounters fire in the internal combustion furnace (104) and burns fully; Step 3: No external fuel gas is introduced, and the airflow after the mixed gas combustion replaces the airflow after the fuel gas combustion and enters the outer heat-insulating sleeve (209) again from the internal combustion furnace (104) and performs heat exchange again to store heat; Step 4: After heat storage is completed, the exhaust gas is discharged into the high-temperature air intake pipe (304) through the heat storage exhaust pipe (221) and enters each first heat exchanger (302) for sufficient heat exchange.

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