RCO catalytic combustion device for waste gas treatment

Abstract

The application discloses an RCO catalytic combustion device for waste gas treatment and relates to the technical field of RCO equipment. The device comprises a catalytic combustion box, the top of the catalytic combustion box is provided with an air outlet pipe, the inside of the catalytic combustion box comprises, from top to bottom, a heating zone, a reaction zone and a separation zone which are distributed at intervals, a vertical cyclone separation cylinder is arranged in the separation zone, an exhaust pipe is arranged in the cyclone separation cylinder in a concentric mode, the top end of the exhaust pipe penetrates through the heating zone and the reaction zone upwards and is connected with the air outlet pipe in a communication mode, the bottom end of the exhaust pipe is arranged in the cyclone separation cylinder, an annular air inlet channel is formed between the cyclone separation cylinder and the exhaust pipe, a plurality of guide plates are arranged at the top end of the cyclone separation cylinder and in the annular air inlet channel, the guide plates are arranged in an array distribution mode along the circumference of the cyclone separation cylinder, all the guide plates are arranged in an inclined mode and have consistent inclination directions, so that the airflow can be blown to the inner wall of the cyclone separation cylinder along the tangent direction of the cyclone separation cylinder after passing through the guide plates. The application has the effect of improving the purification function of the catalytic combustion furnace.

Description

Technical Field

[0001] This application relates to the technical field of RCO equipment, and in particular to an RCO catalytic combustion device for waste gas treatment. Background Technology

[0002] RCO is an abbreviation for Regenerative Catalytic Combustion, a highly efficient organic waste gas treatment technology that combines heat storage and catalytic oxidation technologies to treat volatile organic compounds (VOCs) waste gas. RCO waste gas treatment devices have high purification efficiency; through catalytic oxidation reactions, the waste gas decomposition efficiency can reach over 99%, and it can treat almost all hydrocarbon organic waste gases and odorous gases. Furthermore, it has a low ignition temperature, and with its efficient heat recovery system, energy consumption is significantly lower than that of direct combustion. In some cases, once the ignition temperature is reached, it can maintain operation without external heating, greatly reducing energy consumption.

[0003] A typical RCO (Reactive Carbon Optimization) unit includes an activated carbon adsorption module and a catalytic combustion module. The waste gas first undergoes preliminary filtration before entering the activated carbon adsorption module for adsorption treatment. Within this module, activated carbon and other adsorption materials adsorb organic matter from the waste gas, concentrating it. The purified gas can then be directly discharged through the flue gas emission equipment. When the activated carbon in the adsorption module reaches its adsorption limit, the module stops the intake and exhaust of waste gas. At this point, a high-temperature desorption gas is pumped into the module to desorb and concentrate the organic matter adsorbed on the activated carbon surface. The concentrated waste gas is then discharged through a desorption pipe into the catalytic combustion furnace for catalytic combustion treatment. After heating, the waste gas reacts on a catalytic combustion bed within the furnace. The noble metal catalyst dispersed on the combustion bed effectively reduces the activation energy of the catalytic reaction.

[0004] When the exhaust gas reacts on the catalytic combustion bed, the airflow will impact the catalytic combustion bed because the catalytic combustion bed operates at high temperature for a long time. Furthermore, due to the high temperature, the hot airflow will also cause thermal shock to the catalytic combustion bed. Under the long-term impact of this, the catalyst distributed on the catalytic combustion bed will detach, resulting in the airflow containing catalyst particles after catalytic combustion. At this time, the airflow does not meet the emission standards. Summary of the Invention

[0005] In order to improve the situation where catalyst particles fall off due to the long-term exposure of the catalytic combustion bed to airflow and thermal shock, resulting in the purified airflow failing to meet emission standards, this application provides an RCO catalytic combustion device for waste gas treatment.

[0006] This application provides an RCO catalytic combustion device for waste gas treatment, which adopts the following technical solution:

[0007] An RCO catalytic combustion device for waste gas treatment includes...

[0008] The catalytic combustion chamber has an air inlet pipe on its side wall and an air outlet pipe at its top. The interior of the catalytic combustion chamber includes, from top to bottom, a heating zone, a reaction zone, and a separation zone. The heating zone has a preheating module and an electric heating module arranged from top to bottom. The preheating module is located at the position where the air inlet pipe is located in the catalytic combustion chamber. The reaction zone has a catalytic combustion bed.

[0009] A vertical cyclone separator is installed in the separation zone. An exhaust pipe is concentrically installed inside the cyclone separator. The top of the exhaust pipe passes through the heating zone and the reaction zone and is connected to the outlet pipe. The bottom of the exhaust pipe is placed inside the cyclone separator. An annular air intake channel is formed between the cyclone separator and the exhaust pipe to allow the airflow after catalytic combustion to enter. Multiple guide plates are installed at the top of the cyclone separator and inside the annular air intake channel. The guide plates are arranged in an array around the circumference of the cyclone separator. All guide plates are inclined and in the same direction so that the airflow can be blown towards the inner wall of the cyclone separator along the tangential direction after passing through the guide plates.

[0010] Optionally, one end of the guide plate is rotatably connected to the inner wall of the cyclone separator, and the other end is rotatably connected to the outer wall of the exhaust pipe. The rotation axis of the guide plate is horizontal and extends radially along the cyclone separator. The catalytic combustion chamber is provided with multiple temperature-controlled expansion joints between the catalytic combustion bed and the cyclone separator. The temperature-controlled expansion joints are made of shape memory alloy. The phase change temperature of the temperature-controlled expansion joints is higher than the reaction temperature under normal operating conditions of the catalytic combustion bed. After the temperature-controlled expansion joints reach their own phase change temperature, they can contract. After the temperature-controlled expansion joints contract, they drive all the guide plates to deflect along their own rotation axis through the transmission component, so that the guide plates deflect upwards in the direction of their corresponding lower tilt.

[0011] Optionally, the transmission assembly includes a drive ring, which is coaxially sleeved and rotatably connected to the outside of the exhaust pipe. The drive ring is located above the guide plate. A connecting rod extends radially from the outer wall of the drive ring corresponding to the position of each guide plate. The connecting rod is connected to the top of the corresponding guide plate. One end of the temperature-controlled telescopic component is connected to the drive ring, and the other end is connected to the inner wall of the cyclone separator. All temperature-controlled telescopic components are spaced apart and distributed in a divergent manner around the exhaust pipe. After the temperature-controlled telescopic components contract due to heat, they drive the drive ring to rotate in the opposite direction of the downward tilt of the guide plate. A return component is also provided between the drive ring and the exhaust pipe to drive the drive ring back to its initial position.

[0012] Optionally, a support ring is provided at the bottom of the drive ring. The support ring is coaxially fixedly sleeved on the outside of the exhaust pipe. The bottom of the drive ring is slidably connected to the support ring. A limit post is fixed on the outer side wall where the drive ring and the support ring slide in contact. A limit groove is opened on the outer side wall of the support ring. The limit post is inserted into and slidably connected in the limit groove to limit the rotation angle of the drive ring.

[0013] Optionally, the connecting rod is connected to the top of the corresponding guide plate via a damping element. The damping element includes a damping cylinder and a piston. The piston is slidably connected to the damping cylinder. The damping cylinder is hinged to the bottom of the connecting rod. The piston is hinged to the top of the corresponding guide plate via a piston rod. The piston has a throttling orifice. The damping cylinder is filled with damping oil.

[0014] Optionally, the upward-sloping side of the air deflector is configured as an outwardly convex curved surface, and the downward-sloping side of the air deflector is configured as a flat plane, with all the upward-sloping sides of the air deflectors covering the entire annular air intake.

[0015] Optionally, a collection box is connected to the bottom opening of the cyclone separator, and the collection box is used to collect the catalytic particles separated in the cyclone separator.

[0016] Optionally, along the airflow direction, the airflow channel inside the preheating module or the electric heating module is configured as an S-shaped flow channel to extend the heating path of the exhaust gas.

[0017] Optionally, a temperature sensor is provided between the reaction zone and the separation zone in the catalytic combustion chamber to monitor the temperature of the gas flow from the catalytic combustion bed in real time.

[0018] In summary, this application includes at least one of the following beneficial effects:

[0019] 1. By employing a rotatable guide plate within the catalytic combustion chamber and a temperature-controlled expansion joint between the catalytic combustion bed and the cyclone separator, the expansion joint, made of shape memory alloy, automatically contracts upon reaching its phase change temperature and returns to its original length when the temperature drops below its phase change temperature. A drive ring is installed between the expansion joint and the guide plate, connecting both. When the exhaust gas intake in the catalytic combustion furnace is normal, the exhaust gas undergoes catalytic combustion on the catalytic combustion bed, reaching its normal operating temperature. However, if the exhaust gas intake suddenly increases, the reaction on the catalytic combustion bed becomes more intense, raising its reaction temperature. The exhaust gas exiting the catalytic combustion bed will also be warmer than its normal operating temperature. This temperature increase, combined with the increased airflow velocity, causes more catalytic particles to detach from the precious metal surface of the catalytic combustion bed, thus influencing the phase change of the temperature-controlled expansion joint. The temperature is higher than the normal operating temperature, so the temperature control expansion joint will not contract itself under the normal operating temperature. Once the temperature of the gas flow out of the catalytic combustion bed is higher than the normal operating temperature and reaches the phase change temperature of the temperature control expansion joint, the temperature control expansion joint will begin to contract itself. The simultaneous contraction of all temperature control expansion joints will pull the drive ring to rotate. After the drive ring rotates, it will drive all the guide plates to deflect along their own axis. At this time, all the guide plates that were originally tilted will be driven by the drive ring to become more tilted. The larger the deflection angle of the guide plate, the closer the angle of the guide plate is to the horizontal tangent direction of the cyclone separator, the stronger the guiding effect on the airflow, the larger the tangential velocity component of the airflow, and the more violent the vortex formed by the airflow in the cyclone separator. The better the separation effect of the catalytic particles in the airflow, the higher the temperature. Due to the high temperature and the impact of the airflow, more catalytic particles are carried out. At this time, the more violent the airflow vortex in the cyclone separator, the greater the separation force of the catalytic particles, thereby improving the purification effect of the airflow. This allows the cyclone separator to separate more catalytic particles in the airflow when the intake volume of the exhaust gas increases.

[0020] 2. When the intake volume of exhaust gas suddenly increases within a certain period, the temperature of the airflow blown out by the catalytic combustion bed rises. At this time, the temperature control expansion joint contracts, driving the drive ring to rotate. The drive ring then drives all the guide vanes to deflect more horizontally. Since the airflow entering the cyclone separator flows through the gap between every two adjacent guide vanes, when the angle of the guide vanes becomes more "oblique" (closer to the horizontal tangent), the effective flow cross-sectional area formed between all two adjacent guide vanes will decrease. This is equivalent to forming a variable "throttle valve" in the airflow path, and the deflection angle of the guide vanes increases. The throttling effect creates a positive pressure below the catalytic combustion bed. This positive pressure slows down the speed of the exhaust gas passing through the catalytic combustion bed and increases the residence time of the gas in the catalytic combustion bed. For fast reactions like catalytic combustion, appropriately increasing the residence time and slightly suppressing the flow rate helps to mitigate the intensity of the reaction, thereby playing a role in auxiliary cooling and preventing hot spot runaway. At this time, the flow velocity increases when the airflow passes through the gap between the guide plates, which can further increase the speed of the airflow in the horizontal tangential direction, promote the formation of a more intense vortex, and help separate the catalytic particles in the airflow.

[0021] 3. After being preheated and heated from top to bottom, the exhaust gas undergoes catalytic combustion on the catalytic combustion bed. The gas flow, after being treated by combustion, continues to move downwards through the gas passage of the catalytic combustion bed and enters the cyclone separator below in a turbulent manner from the annular inlet. A guide vane is installed at the inlet of the annular inlet. The inclined surface of the guide vane can guide the turbulent airflow into the cyclone separator at a specific angle. During this process, the guide vane can effectively rectify the turbulent airflow. After rectification, the airflow enters the cyclone separator tangentially, allowing the airflow to spiral downwards around the inner wall of the cyclone separator. In this process, the catalytic particles carried in the airflow are separated. The larger the deflection angle of the guide vane, the more obvious the rectification effect on the airflow, effectively improving the separation effect of particles inside the airflow.

[0022] 4. By configuring the upward-facing side of all deflectors as an outward-convex curved surface, and the downward-facing side as a flat plane, since the airflow flows from top to bottom across the deflector surface, the airflow will generate a continuous downward impact force on the upward-facing side of the deflector during its downward flow. This causes the pressure on the upward-facing side of the deflector to be greater than the pressure on the downward-facing side. The deflector will be affected by this and will deflect or twist accordingly, potentially causing vibration during the airflow guidance process. Configuring the upward-facing side of the deflector as an outward-convex curved surface, while simultaneously tilting the deflector... The downward-facing side is configured as a flat plane. During the downward flow of air, the time along the two sides of the same guide vane is the same. However, since the upward-facing side of the guide vane is convex, the airflow velocity is greater when flowing through the upward-facing side of the guide vane and less when flowing through the downward-facing side. The pressure on the upward-facing side of the guide vane is less than the pressure on the downward-facing side. The pressure difference between the two sides of the guide vane will generate an upward net pressure. This pressure is exactly opposite to the downward impact force exerted by the airflow on the guide vane. The two can cancel each other out to a certain extent, making the guide vane more stable when guiding the airflow.

[0023] 5. By employing a damping component between the connecting rod and the guide plate, the guide plate may experience high-frequency vibrations due to the prolonged impact of the downward airflow. Macroscopically, this manifests as the guide plate reciprocating at a certain angle along its own axis of rotation. Such vibrations affect the stability of the guide plate's operation. The damping component includes a damping cylinder and a piston. The piston is slidably connected within the damping cylinder, which is hinged to the bottom of the connecting rod. The piston is hinged to the top of the corresponding guide plate via a piston rod. The piston has a through-hole with a very small diameter throttling orifice, and the damping cylinder is filled with damping oil. When the piston reciprocates within the damping cylinder, the damping oil must be squeezed out from one side through the throttling orifice. On the other side, a damping force related to the speed of movement is generated. The temperature-controlled telescopic component contracts due to heat, driving the drive ring to rotate slowly. At this time, the drive ring drives the guide plate to deflect at a low speed through the connecting rod. The piston in the damping cylinder moves slowly, and the damping force generated when the damping oil passes through the throttle orifice is very small and will not hinder the normal deflection of the guide plate. However, when the airflow impact causes the guide plate to try to swing back and forth quickly, the guide plate will drive the piston to move quickly in the damping cylinder through the piston rod. The damping oil generates huge flow resistance at the throttle orifice. This huge damping force will instantly suppress the rapid movement of the piston, thus directly locking the vibration of the guide plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the overall structure of the catalytic combustion chamber according to an embodiment of this application;

[0025] Figure 2This is a cross-sectional schematic diagram illustrating the internal structure of the catalytic combustion chamber according to an embodiment of this application;

[0026] Figure 3 This is a schematic diagram illustrating a partial structure inside the cyclone separator according to an embodiment of this application;

[0027] Figure 4 This is a partial structural schematic diagram of the deflector plate shown in an embodiment of this application;

[0028] Figure 5 This is a partial cross-sectional schematic diagram illustrating the motion structure of the drive ring in an embodiment of this application;

[0029] Figure 6 This is a partial schematic diagram illustrating the drive ring limiting structure in an embodiment of this application;

[0030] Figure 7 yes Figure 4 An enlarged view at point A.

[0031] Explanation of reference numerals in the attached drawings: 1. Catalytic combustion chamber; 11. Inlet pipe; 12. Outlet pipe; 13. Collection box; 14. Temperature sensor; 15. Annular intake duct; 16. Guide plate; 2. Preheating module; 21. Ceramic heat storage body; 3. Electric heating module; 4. Catalytic combustion bed; 5. Cyclone separator; 6. Exhaust pipe; 61. Drive ring; 611. Connecting rod; 612. Returning component; 613. Limiting post; 62. Support ring; 621. Limiting groove; 63. Damping component; 631. Damping cylinder; 632. Piston rod; 7. Temperature control telescopic component. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0033] This application discloses an RCO catalytic combustion device for waste gas treatment, referring to... Figure 1 and Figure 2The RCO catalytic combustion device for waste gas treatment includes a catalytic combustion chamber 1, which is a vertically placed cuboid. An inlet pipe 11 is connected to one of the upper side walls of the catalytic combustion chamber 1, and an outlet pipe 12 is connected to the top of the catalytic combustion chamber 1. The inlet pipe 11 can be connected to the secondary pipeline (desorption pipeline) of the entire RCO system via a vacuum pump. In the RCO system, VOCs (volatile organic compounds) in the waste gas are first treated by activated carbon filtration and remain in the activated carbon treatment chamber. The VOCs waste gas remaining in the activated carbon treatment chamber is desorbed and concentrated before entering the catalytic combustion chamber 1 through the inlet pipe 11. The interior of the catalytic combustion chamber 1 includes, from top to bottom, an alternately distributed heating zone, a reaction zone, and a separation zone, which are used to heat the waste gas entering the catalytic combustion chamber 1, perform catalytic combustion reaction, and separate catalytic particles, respectively. Finally, after the waste gas undergoes catalytic combustion reaction and separation of residual particles, it is discharged upwards through the outlet pipe 12 from the catalytic combustion chamber 1.

[0034] The catalytic combustion chamber 1 is equipped with a preheating module 2, an electric heating module 3, a catalytic combustion bed 4, and a cyclone separator 5 arranged sequentially from top to bottom. The preheating module 2 and the electric heating module 3 are both located in the heating zone, the catalytic combustion bed 4 is installed and fixed in the reaction zone, and the cyclone separator 5 is fixed in the separation zone. In addition, a collection box 13 is fixed below the cyclone separator 5 in the catalytic combustion chamber 1. The collection box 13 is used to receive and collect the catalytic particle residue at the separation point of the airflow in the cyclone separator 5.

[0035] The preheating module 2 is fixedly installed at the position where the inlet pipe 11 is located in the catalytic combustion chamber 1. This allows the exhaust gas to enter the catalytic combustion chamber 1 through the inlet pipe 11 and then directly enter the preheating module 2 for preheating. The preheating module 2 is in a sealed state relative to the catalytic combustion chamber 1. All the exhaust gas enters the preheating module 2 through the inlet pipe 11 for preheating and will not dissipate to other areas inside the catalytic combustion chamber 1. A vertically placed ceramic heat storage body 21 is fixed inside the preheating module 2. The ceramic heat storage body 21 can be designed as multiple vertically arranged side-by-side at intervals. In this case, multiple through holes are horizontally opened on the ceramic heat storage body 21. The exhaust gas comes into contact with the ceramic heat storage body 21 for sufficient heat exchange, and then flows forward through the through holes on the ceramic heat storage body 21. Using the ceramic heat storage body 21 to preheat the airflow is a common technique used by those skilled in the art and will not be elaborated further here; the key is to ensure that the exhaust gas is sufficiently preheated.

[0036] The preheating module 2 has an airflow outlet at its lower part on the side away from the intake pipe 11. After being fully preheated by the preheating module 2, the exhaust gas enters the electric heating module 3 through the airflow outlet, heating the exhaust gas to the target temperature for catalytic combustion. To monitor in real time whether the exhaust gas has reached the target temperature after heating, a temperature sensor 14 is fixed on the side wall of the catalytic combustion chamber 1 at the position between the electric heating module 3 and the catalytic combustion bed 4. The temperature sensor 14 can monitor the temperature of the exhaust gas after being heated by the electric heating module 3 in real time. The temperature sensor 14 feeds back the detected temperature information to the PLC control unit (not shown) of the RCO catalytic combustion device. The control unit dynamically adjusts the power of the electric heating unit so that the temperature of the exhaust gas can reach the target temperature for catalytic combustion when it enters the catalytic combustion bed 4. In this embodiment, the airflow path inside the electric heating module 3 is S-shaped and divided into three horizontal heating sections, which can sufficiently extend the heating path of the exhaust gas. In other embodiments of this application, the number of layers of the electric heating module 3 can be increased or decreased according to the actual size of the catalytic combustion chamber 1 and the actual working conditions of exhaust gas heating, so that the electric heating module 3 has a sufficiently long path to fully heat the exhaust gas.

[0037] The catalytic combustion bed 4 is positioned below the electric heating module 3. The catalytic combustion bed 4 generally comprises a support material and a noble metal catalyst. The noble metal catalyst is highly dispersed in the form of extremely fine particles on a support material with a high specific surface area. In this embodiment, the support material is preferably alumina, and the noble metal catalyst is preferably platinum. Alumina is the most commonly used support material, possessing a high specific surface area and good thermal stability. Platinum is one of the most widely used noble metal catalysts, exhibiting high catalytic activity for various organic compounds (including saturated hydrocarbons, aromatic hydrocarbons, alcohols, ketones, etc.), effectively reducing the ignition temperature of waste gas, and is widely used in the field to treat various complex VOCs waste gases. The catalytic combustion bed 4 has densely packed vertical through holes. The precious metal catalyst is dispersed on the inner wall of the catalytic combustion bed 4 with through holes. When the exhaust gas passes vertically through the vertical through holes of the catalytic combustion bed 4 from top to bottom, the organic compounds in the exhaust gas complete the catalytic combustion reaction on the catalytic combustion bed 4. The thickness of the catalytic combustion bed 4 is generally adjusted according to the actual catalytic combustion reaction so that the exhaust gas can undergo a full catalytic combustion reaction on the catalytic combustion bed 4, thereby purifying the exhaust gas.

[0038] Reference Figures 2 to 4Because the exhaust gas undergoes catalytic combustion reaction on the catalytic combustion bed 4, the catalytic combustion bed 4 is continuously subjected to the impact of airflow and high temperature during operation. Under long-term high-temperature operation and thermal shock, the precious metal catalyst will undergo micro-fragmentation and pulverization. These catalyst particles carrying precious metals will be lost with the airflow. This not only causes the loss of precious metals, but more seriously, these particles are potential heavy metal pollutants emitted into the atmosphere. These particles are extremely small and are in a high-temperature, high-speed airflow, making it difficult for conventional filters to work effectively for a long time under these conditions. Therefore, the cyclone separator 5 is vertically fixed below the catalytic combustion bed 4. The side wall at the top of the cyclone separator 5 is sealed to the inner wall of the catalytic combustion chamber 1. An exhaust pipe 6 is concentrically installed inside the cyclone separator 5. The top of the exhaust pipe 6 passes upward through the heating zone and the reaction zone and is fixed and connected to the exhaust pipe 12. The catalytic combustion bed 4, the electric heating module 3, and the preheating module 2 through which the exhaust pipe 6 passes all have through holes that match the exhaust pipe 6. The positions where the exhaust pipe 6 passes through the catalytic combustion bed 4, the electric heating module 3, and the preheating module 2 are sealed to the exhaust pipe 6. Heat exchange fins (not shown) are also fixed on the side wall of the exhaust pipe 6 corresponding to the preheating module 2, so that the heat of the exhaust gas can be provided to the preheating module 2, allowing the heat to be fully utilized. The bottom end of the exhaust pipe 6 is placed inside the cyclone separator 5, thus forming an annular air intake duct 15 between the cyclone separator 5 and the exhaust pipe 6. After passing through the catalytic combustion bed 4, the exhaust gas enters the cyclone separator 5 downward through the annular air intake duct 15.

[0039] Multiple guide vanes 16 are provided at the top of the cyclone separator 5 and inside the annular air intake duct 15. All guide vanes 16 are arranged in a circumferential array along the cyclone separator 5, and each guide vane 16 extends in the horizontal direction along the radial direction of the cyclone separator 5. An air intake gap is left between two adjacent guide vanes 16. All guide vanes 16 are inclined and in the same direction, similar to the annular structure of the turbine guide vanes in an aircraft engine. When the purified airflow enters the cyclone separator 5 through the air intake gap between two adjacent guide plates 16, the guide plates 16 can guide the airflow to tilt downwards and enter the cyclone separator 5 along the tangential direction of the cyclone separator 5. When the downward airflow passes through these tilted guide plates 16, it will be forced to be given an initial rotational speed, thereby forming a continuous and basic vortex in the lower cyclone separator 5. This basic vortex is sufficient to separate larger catalyst particles that have fallen off due to normal vibration or airflow scouring, realizing a continuous and basic catalyst recovery function. After separating the catalyst particles, the airflow continues to spiral upwards through the exhaust pipe 6 and finally exits from the exhaust pipe 12 at the top of the catalytic combustion chamber 1.

[0040] To enhance the rotational speed of the airflow after entering the cyclone separator 5, the top opening of the cyclone separator 5 can be appropriately reduced. Along the radial direction of the cyclone separator 5, the distance between the inner wall of the cyclone separator 5 and the outer wall of the exhaust pipe 6 is reduced, thus narrowing the width of the annular intake duct 15. Correspondingly, the width of the guide plate 16 in the horizontal direction is also reduced to match the width of the annular intake duct 15. Because the width of the annular intake duct 15 is reduced, the intake gap between adjacent guide plates 16 also decreases. The airflow rate is the same when passing through the annular intake duct 15. When the intake gap is narrowed, the airflow velocity through the annular intake duct 15 increases significantly, and the rotational speed of the airflow within the cyclone separator 5 increases, enabling the separation of finer catalyst particles. Furthermore, the vertical height of the cyclone separator 5 can also be appropriately increased to provide sufficient descent path for the airflow as it spirals downwards, allowing ample time for the catalyst particles in the airflow to separate. In addition, in order to simplify the number of internal components of the catalytic combustion device, the actual number of guide vanes 16 can be appropriately reduced according to the area of ​​the actual annular air intake 15. The coverage area of ​​a single guide vane 16 can also be increased by increasing the actual volume of a single guide vane 16, which can further reduce the number of guide vanes 16. Therefore, the actual number of guide vanes 16 can be flexibly adjusted according to the actual operating conditions.

[0041] After being preheated and heated from top to bottom, the exhaust gas undergoes catalytic combustion on the catalytic combustion bed 4. The gas flow, after combustion treatment, continues to move downwards through the gas passage of the catalytic combustion bed 4 and enters the cyclone separator 5 below in a turbulent manner from the annular inlet 15. A guide plate 16 is set at the inlet of the annular inlet 15. The inclined surface of the guide plate 16 can guide the turbulent air flow into the cyclone separator 5 at a specific angle. During this process, the guide plate 16 can effectively rectify the turbulent air flow. After rectification, the air flow enters the cyclone separator 5 tangentially, allowing the air flow to spiral downwards around the inner wall of the cyclone separator 5. During this process, the catalytic particles carried in the air flow are separated. The larger the deflection angle of the guide plate 16, the more obvious the rectification effect on the air flow, effectively improving the separation effect of catalyst particles inside the air flow.

[0042] Furthermore, for most industrial VOCs waste gas treatments, the normal operating temperature of the catalytic combustion bed 4 under normal conditions is generally between 300-450℃. At this time, the flow rate of the waste gas entering the catalytic combustion chamber 1 is within the rated flow rate range. When the entire RCO catalytic combustion device operates under overload conditions for a certain period of time, the flow rate or concentration of the waste gas generated after desorption suddenly increases during this period, leading to a more vigorous catalytic reaction. The reaction temperature on the catalytic combustion bed 4 will increase significantly, generally reaching 500℃ or higher during overload reactions. Therefore, the temperature of the waste gas flowing out of the catalytic combustion bed 4 will also increase accordingly. For the catalytic combustion bed 4, when the catalytic reaction proceeds more vigorously, the airflow impact on the catalytic combustion bed 4 will be more intense, and the thermal shock effect caused by the airflow on the catalytic combustion bed 4 will also be more severe, leading to more serious catalyst particle shedding on the catalytic combustion bed 4. At this time, the catalyst particle content in the airflow entering the cyclone separator 5 will increase significantly.

[0043] Therefore, the guide plate 16 is designed to be rotatably connected to the cyclone separator 5. Specifically, one end of the guide plate 16 is rotatably connected to the inner wall of the cyclone separator 5, and the other end is rotatably connected to the outer wall of the exhaust pipe 6. The axis of rotation of the guide plate 16 is horizontal and extends radially along the cyclone separator 5. Meanwhile, the catalytic combustion chamber 1 is provided with multiple temperature-controlled expansion joints 7 between the catalytic combustion bed 4 and the cyclone separator 5. In this embodiment, the number of temperature-controlled expansion joints 7 is preferably three, and the three temperature-controlled expansion joints 7 are distributed circumferentially around the exhaust pipe 6. All three temperature-controlled expansion joints 7 are inclined. The temperature-controlled expansion joints 7 are made of shape memory alloy, and the phase change temperature of the temperature-controlled expansion joints 7 is higher than the reaction temperature of the catalytic combustion bed 4 under normal operating conditions (300-450℃). To enable the temperature-controlled expansion joints 7 to undergo phase change under overload conditions (>500℃), the temperature-controlled expansion joints 7 are preferably made of a suitable nickel-titanium-hafnium alloy. For example, adjusting the proportion of the main alloying elements or adding a third alloying element such as hafnium, combined with precise aging heat treatment processes, can enable the temperature-controlled expansion joint 7 to be manufactured as a high-temperature shape memory alloy. The production of shape memory alloys is usually highly customized. Alloy manufacturers will produce specific batches of materials by adjusting the alloy composition and optimizing the heat treatment process according to the specific needs of customers (including the required phase transformation temperature range). This is something that those skilled in the art can easily conceive of, and will not be elaborated here. It is only necessary to make the temperature-controlled expansion joint 7 begin to undergo a phase transformation and contract itself at the overload operating temperature (>500℃). After the temperature-controlled expansion joint 7 contracts, the transmission component drives all the guide plates 16 to deflect along their own rotation axis, so that the guide plates 16 deflect upwards in the direction of their corresponding lower tilt, that is, deflect in a more horizontal direction, so that the tilt angle of the guide plates 16 is appropriately reduced.

[0044] Furthermore, refer to Figures 4 to 7The transmission assembly includes a drive ring 61 and a support ring 62. The drive ring 61 is coaxially sleeved and rotatably connected to the outside of the exhaust pipe 6, while the support ring 62 supports the drive ring 61 and is coaxially fixedly sleeved on the outer wall of the exhaust pipe 6. The drive ring 61 is coaxially slidably connected to the support ring 62, and the support ring 62 provides stable support and guidance for the drive ring 61. Both the drive ring 61 and the support ring 62 are located above the horizontal plane where the guide plate 16 is located. A connecting rod 611 extends radially from the outer wall of the drive ring 61 corresponding to the position of each guide plate 16. The connecting rod 611 has a cylindrical appearance, which can effectively reduce the impact of airflow. The connecting rod 611 is connected to the top of the corresponding guide plate 16 as a whole through a damping element 63. The lower end of the temperature-controlled telescopic component 7 is fixedly connected to the top surface of the drive ring 61, and the upper end of the temperature-controlled telescopic component 7 is fixedly connected to the inner wall of the cyclone separator 5. The direction of inclination of the upper end of the temperature-controlled telescopic component 7 is opposite to the direction of inclination of the lower end of the guide plate 16. When the temperature-controlled telescopic component 7 reaches its phase change temperature, it begins to gradually contract its length. At this time, all three temperature-controlled telescopic components 7 simultaneously pull the drive ring 61 to begin rotating. Assuming the direction of rotation of the drive ring 61 due to the contraction of the temperature-controlled telescopic components 7 is the first direction, the temperature-controlled telescopic component... When the shrinking component 7 retracts, it pulls the drive ring 61 to rotate in the first direction. The drive ring 61 drives all the guide plates 16 to move through the connecting rod 611 and the damping component 63. Since the bottom end of the damping component 63 is connected to the top end of the corresponding guide plate 16, the top end of the guide plate 16 will move in the first direction along with the drive ring 61. Therefore, the bottom end of the guide plate 16 will move in the opposite direction of the first direction. As a result, the guide plate 16 deflects around its own axis, causing each guide plate 16 to deflect towards a more horizontal state.

[0045] When the exhaust gas intake in the catalytic combustion chamber 1 is normal, the exhaust gas undergoes normal catalytic combustion on the catalytic combustion bed 4. At this time, the temperature reached by the catalytic combustion bed 4 due to the catalytic combustion reaction is the normal operating temperature. Since the normal operating temperature does not reach the phase change temperature of the temperature control expansion joint 7, the temperature control expansion joint 7 will not undergo a phase change, the drive ring 61 will not rotate, and each guide plate 16 is in its initial tilted state. When the guide plate 16 is in its initial state, the tilted upward side of all guide plates 16 covers the entire area of ​​the annular intake duct 15, and most of the airflow is guided by the guide plate 16. However, when the exhaust gas intake suddenly increases for a period of time, the exhaust gas will undergo a more violent reaction on the catalytic combustion bed 4, causing the reaction temperature of the catalytic combustion bed 4 to rise. The temperature of the exhaust gas after flowing out of the catalytic combustion bed 4 will also be higher than the normal operating temperature. The temperature of the catalytic combustion bed 4 rises, and the airflow velocity also increases. Under the dual influence of temperature and airflow impact, more catalytic particles will be peeled off from the surface of the precious metal on the catalytic combustion bed 4. Once flowing out of the catalytic combustion bed 4, these particles will be released into the air. When the airflow temperature in bed 4 is higher than the normal operating temperature and reaches the phase change temperature of the temperature-controlled expansion joint 7, the temperature-controlled expansion joint 7 will begin to contract. The simultaneous contraction of all temperature-controlled expansion joints 7 will pull the drive ring 61 to rotate. After the drive ring 61 rotates, it will drive all the guide plates 16 to deflect along their own axis. At this time, all the guide plates 16 that were originally inclined will be driven by the drive ring 61 to become more inclined and deflect towards a more horizontal state. The larger the deflection angle of the guide plate 16, the closer the angle of the guide plate 16 is to the horizontal tangent direction of the cyclone separator 5, the stronger the guiding effect on the airflow, the larger the tangential velocity component of the airflow, and the more violent the vortex formed by the airflow in the cyclone separator 5. The better the separation effect of the catalyst particles in the airflow, the higher the temperature. Due to the high temperature and the impact of the airflow, more catalyst particles are carried out. At this time, the more violent the airflow vortex in the cyclone separator 5, the greater the separation force of the catalyst particles, thereby improving the purification effect of the airflow. This allows the cyclone separator 5 to separate more catalyst particles in the airflow when the intake volume of the exhaust gas increases.

[0046] Meanwhile, since the airflow entering the cyclone separator 5 flows through the gap between every two adjacent guide plates 16, when the angle of the guide plates 16 becomes more "oblique" (closer to the horizontal tangent), the effective flow cross-sectional area formed between all adjacent guide plates 16 will decrease. This is equivalent to forming a variable "throttling valve" in the airflow path. The increased deflection angle of the guide plates 16 creates a certain positive pressure below the catalytic combustion bed 4. This positive pressure can slow down the speed at which the exhaust gas enters the catalytic combustion chamber 1. For fast reactions like catalytic combustion, appropriately reducing the flow rate helps to mitigate the intensity of the reaction, thereby playing a role in auxiliary cooling and preventing hot spot runaway. Furthermore, the flow velocity increases when the airflow passes through the gap between the guide plates 16, which can further increase the speed of the airflow in the horizontal tangential direction, promoting the formation of a more intense vortex, which helps to separate the catalytic particles in the airflow. To reduce the direct entry of airflow into the cyclone separator 5 through the gap between the guide plate 16 and the inner wall of the catalytic combustion chamber 1, the side wall of the guide plate 16 near the inner wall of the catalytic combustion chamber 1 can be designed as an arc surface and covered with a soft rubber edging. The edging can directly contact the inner wall of the catalytic combustion chamber 1, and when the guide plate 16 deflects, its own deformation can keep the edging in contact with the inner wall of the catalytic combustion chamber 1, so that all the airflow flows into the cyclone separator 5 along the upward inclined side of the guide plate 16.

[0047] A return element 612 is also provided between the drive ring 61 and the exhaust pipe 6. The return element 612 is preferably a torsion spring with a large diameter. The return element 612 is coaxially sleeved in the groove of the support ring 62 and located inside the drive ring 61. One end of the return element 612 is fixed to the inner wall of the support ring 62, and the other end is fixed to the inner wall of the drive ring 61. When the working temperature in the catalytic combustion chamber 1 is higher than the phase change temperature of the temperature control telescopic element 7, the temperature control telescopic element 7 contracts and exerts a pulling force on the drive ring 61 that is greater than the restoring force exerted on the drive ring 61 by the deformation of the return element 612. At this time, the temperature control telescopic element 7 pulls the drive ring 61 to rotate in the first direction. When the working temperature in the catalytic combustion chamber 1 returns to the normal temperature, the temperature control telescopic element 7 returns to its original length. At this time, the pulling force of the temperature control telescopic element 7 on the drive ring 61 gradually decreases and eventually becomes less than the restoring force exerted on the drive ring 61 by the return element 612. At this time, the return element 612 can drive the drive ring 61 to return to its initial position. Meanwhile, a horizontal limiting post 613 is fixed on the outer wall of the drive ring 61 where it slides in contact with the support ring 62. A limiting groove is formed through the outer wall of the support ring 62, and the limiting post 613 is inserted into and slidably connected within the limiting groove. When the drive ring 61 drives the limiting post 613 to slide within the limiting groove, due to the limited length of the limiting groove, the drive ring 61 will abut against the groove wall of the corresponding limiting groove of the support ring 62 after rotating through a preset angle, thereby limiting the rotation angle of the drive ring 61 and preventing the drive ring 61 from rotating too much due to the pulling of the temperature control telescopic component 7. Similarly, when the limiting post 613 abuts against the groove wall of the corresponding limiting groove of the support ring 62, the drive ring 61 returns to its initial position.

[0048] Correspondingly, a temperature sensor 14 is also fixed on the side wall of the catalytic combustion chamber 1 at the location of the temperature control telescopic component 7. This sensor is used to monitor the temperature of the gas flow from the catalytic combustion bed 4 in real time. The temperature sensor 14 is also electrically connected to the control unit. If the air intake of the catalytic combustion chamber 1 is greater than that under overload conditions, the temperature on the catalytic combustion bed 4 will further increase compared to the overload conditions. The temperature sensor 14 can monitor the temperature of the gas flow from the catalytic combustion bed 4 in real time. At this time, in order to protect the equipment from damage by high temperature, the control unit issues a shutdown command to the external air extraction component of the catalytic combustion chamber 1, triggering the equipment protection mechanism.

[0049] Furthermore, the damping component 63 includes a damping cylinder 631 and a piston (not shown). The piston is slidably connected inside the damping cylinder 631. A piston rod 632 is fixed to the end of the piston away from the connecting rod 611. The piston rod 632 extends out of the damping cylinder 631 and is slidably and sealingly connected to the damping cylinder 631. The top of the damping cylinder 631 is hinged to the bottom of the connecting rod 611. The piston is hinged to the top of the corresponding guide plate 16 via the piston rod 632. The piston has densely packed throttling orifices with small diameters. The damping cylinder 631 is filled with damping oil. Since the damping component 63, similar to the damping cylinder 631, is a conventional technical means and mainly plays a buffering role similar to a shock absorber, it will not be described in detail here. Since the connecting rod 611 drives the guide plate 16 to deflect through the damping element 63, the stroke of the piston in the damping cylinder 631 needs to be matched with the rotation distance of the drive ring 61 so that when the piston reaches its limit in the damping cylinder 631, the drive ring 61 still has a rotation margin. At this time, the rotation margin of the drive ring 61 drives the guide plate 16 to deflect through the connecting rod 611 and the damping element 63. The stroke of the piston in the damping cylinder 631 mainly depends on the selection of the damping element 63, which is common knowledge for those skilled in the art.

[0050] Because the deflector 16 is subjected to the impact of the downward airflow for a long time, the deflector 16 may generate high-frequency vibration. Macroscopically, this manifests as the deflector 16 reciprocating at a certain angle along its own axis of rotation. Such vibration disturbance will affect the working stability of the deflector 16. If the deflector 16 vibrates, when the piston reciprocates in the damping cylinder 631, the damping oil must be squeezed from one side to the other through the throttle hole, thereby generating a damping force related to the movement speed. When the temperature-controlled telescopic component 7 contracts due to heat, it drives the drive ring 61 to rotate relatively slowly. At this time, the drive ring 61 drives the guide plate 16 to deflect at a low speed through the connecting rod 611. The piston in the damping cylinder 631 moves slowly, and the damping force generated when the damping oil passes through the throttle orifice is very small, which will not hinder the normal deflection of the guide plate 16. However, when the airflow impact causes the guide plate 16 to try to swing back and forth quickly, the guide plate 16 will drive the piston to move quickly in the damping cylinder 631 through the piston rod 632. The damping oil generates huge flow resistance at the throttle orifice. This huge damping force will instantly suppress the rapid movement of the piston, thereby directly locking the vibration of the guide plate 16.

[0051] Furthermore, the upward-sloping side of the deflector 16 is configured as an outwardly convex curved surface, while the downward-sloping side is configured as a flat plane. Since the airflow flows from top to bottom across the surface of the deflector 16, the downward flow generates a continuous downward impact force on the upward-sloping side of the deflector 16, causing the pressure on the upward-sloping side to be greater than the pressure on the downward-sloping side. This can cause the deflector 16 to deflect or twist, potentially leading to vibrations during airflow guidance. By configuring the upward-sloping side of the deflector 16 as an outwardly convex curved surface and the downward-sloping side as a flat plane, the downward flow of air... In the process, the time along the two sides of the same guide plate 16 is the same. However, since the upward-sloping side of the guide plate 16 is convex, the airflow velocity is greater when flowing through the upward-sloping side of the guide plate 16, and smaller when flowing through the downward-sloping side of the guide plate 16. The pressure on the upward-sloping side of the guide plate 16 is less than the pressure on the downward-sloping side. The pressure difference between the two sides of the guide plate 16 will generate an upward net pressure. This pressure is exactly opposite to the downward impact force exerted by the airflow on the guide plate 16. The two can cancel each other out to a certain extent, making the guide plate 16 more stable when guiding the flow.

[0052] In a typical RCO catalytic combustion system, the exhaust gas, after desorption and concentration, enters the furnace through the bottom inlet. It then rises into the heating chamber where it is heated by heating wires. The heated exhaust gas then enters the central catalytic combustion chamber for reaction. The empty chamber in the diagram can accommodate a catalytic combustion substrate. The reacted gas then flows downwards from the outlet (not shown) on the other side of the furnace, completing the catalytic combustion process. Some existing catalytic combustion furnaces have filters installed at the outlet to remove impurities from the gas. However, these filters accumulate dust over time, requiring frequent replacement, which is time-consuming and labor-intensive. In contrast, the catalytic combustion chamber 1 of this application requires no replacement; only the collection box 13 needs to be removed periodically to clean the collected impurities, resulting in more efficient cleaning.

[0053] In the catalytic combustion chamber 1 of this application, although the temperature rise inside the chamber is not instantaneous during reaction overload, and the phase change expansion and contraction of the temperature control expansion member 7 is gradual and requires response time, the airflow can still form a downward spiral vortex guided by the guide plate 16 before the temperature control expansion member 7 contracts due to heat. Although the vortex formed at this time is not as strong as that after the guide plate 16 deflects, the separation effect of catalyst particles in the airflow is always ongoing. Compared with conventional catalytic combustion furnaces, it is clear that when the catalytic combustion reaction is more intense and the temperature rises significantly, the catalyst particles will detach more severely, and therefore, it does not consider what countermeasures should be taken when the catalyst particles detach more severely.

[0054] The implementation principle of the RCO catalytic combustion device for waste gas treatment in this application embodiment is as follows: the waste gas passes through the preheating module 2, the electric heating module 3, and the catalytic combustion bed 4 from top to bottom. After the waste gas completes the catalytic combustion reaction in the catalytic combustion bed 4, it continues to flow downwards into the cyclone separator 5 through the annular inlet 15. When the gas flows through the annular inlet 15, it flows downwards along the inclined upward side of the guide plate 16. When the waste gas intake in the catalytic combustion furnace is normal, the guide plate 16 is in an inclined state in the initial state. All the inclined upward sides of the guide plate 16 Covering the entire annular intake duct 15 area, the guide vanes 16 guide the airflow downwards and into the cyclone separator 5 along the tangential direction. As the downward airflow passes through these inclined guide vanes 16, it is forced to acquire an initial rotational speed, thereby forming a continuous, fundamentally strong vortex within the cyclone separator 5. This vortex is sufficient to separate larger catalyst particles that have detached due to normal vibration or airflow scouring. After separating the catalyst particles, the airflow continues to spiral upwards through the exhaust pipe 6, finally exiting from the top of the catalytic combustion chamber 1. Pipe 12 discharges; when the intake volume of exhaust gas suddenly increases within a certain period of time, the reaction temperature of the catalytic combustion bed 4 rises, and the exhaust gas flow rate also increases. Under the dual influence of temperature and airflow impact, more catalytic particles will be peeled off from the surface of the precious metal on the catalytic combustion bed 4. At this time, the temperature reaches the phase change temperature of the temperature control expansion joint 7 and begins to contract itself. The simultaneous contraction of all temperature control expansion joints 7 will pull the drive ring 61 to rotate. After the drive ring 61 rotates, it will drive all the guide plates 16 to deflect. At this time, all the guide plates 16 that were originally inclined will be deflected by the drive ring 61. This causes the airflow to tilt further and deflect towards a more horizontal state. The larger the deflection angle of the guide plate 16, the closer the angle of the guide plate 16 is to the horizontal tangential direction of the cyclone separator 5, the stronger the guiding effect on the airflow, the larger the tangential velocity component of the airflow, and the more violent the vortex formed by the airflow in the cyclone separator 5. This results in a better separation effect on the catalyst particles in the airflow, which can increase the separation force of the catalyst particles and thus improve the purification effect of the airflow. This allows the cyclone separator 5 to separate more catalyst particles in the airflow when the intake volume of the exhaust gas increases.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An RCO catalytic combustion device for waste gas treatment, characterized in that: include Catalytic combustion chamber (1) has an air inlet pipe (11) on its side wall and an air outlet pipe (12) at its top. The interior of the catalytic combustion chamber (1) includes a heating zone, a reaction zone and a separation zone arranged from top to bottom. The heating zone is provided with a preheating module (2) and an electric heating module (3) arranged from top to bottom. The preheating module (2) is located at the position where the air inlet pipe (11) is provided in the catalytic combustion chamber (1). The reaction zone is provided with a catalytic combustion bed (4). A vertical cyclone separator (5) is provided in the separation zone. An exhaust pipe (6) is concentrically installed in the cyclone separator (5). The top of the exhaust pipe (6) passes through the heating zone and the reaction zone and is connected to the exhaust pipe (12). The bottom of the exhaust pipe (6) is placed in the cyclone separator (5). An annular air intake channel (15) is formed between the cyclone separator (5) and the exhaust pipe (6) to allow the airflow after catalytic combustion to enter. Multiple guide plates (16) are provided at the top of the cyclone separator (5) and in the annular air intake channel (15). The guide plates (16) are arranged in an array around the cyclone separator (5). All guide plates (16) are inclined and in the same direction so that the airflow can be blown towards the inner wall of the cyclone separator (5) along the tangential direction after passing through the guide plates (16). One end of the guide plate (16) is rotatably connected to the inner wall of the cyclone separator (5), and the other end is rotatably connected to the outer wall of the exhaust pipe (6). The axis of rotation of the guide plate (16) is horizontal and extends radially along the cyclone separator (5). The catalytic combustion chamber (1) is provided with multiple temperature control telescopic components (7) between the catalytic combustion bed (4) and the cyclone separator (5). The temperature control telescopic components (7) are made of shape memory alloy. The phase change temperature of the temperature control telescopic components (7) is higher than the reaction temperature of the catalytic combustion bed (4) under normal operating conditions. After the temperature control telescopic components (7) reach their own phase change temperature, they can contract. After the temperature control telescopic components (7) contract, they drive all the guide plates (16) to deflect along their own axis of rotation through the transmission assembly so that the guide plates (16) deflect upwards in the direction of their own lower tilt. The transmission assembly includes a drive ring (61), which is coaxially sleeved and rotatably connected to the outside of the exhaust pipe (6). The drive ring (61) is located above the guide plate (16). A connecting rod (611) extends radially from the outer wall of the drive ring (61) corresponding to the position of each guide plate (16). The connecting rod (611) is connected to the top of the corresponding guide plate (16). One end of the temperature control telescopic component (7) is connected to the drive ring (61), and the other end is connected to the inner wall of the cyclone separator (5). All temperature control telescopic components (7) are spaced apart and distributed in a divergent manner around the exhaust pipe (6). After the temperature control telescopic component (7) is heated and contracts, it drives the drive ring (61) to rotate in the opposite direction of the lower part of the guide plate (16). A return component (612) is also provided between the drive ring (61) and the exhaust pipe (6) to drive the drive ring (61) back to the initial position.

2. The RCO catalytic combustion device for waste gas treatment according to claim 1, characterized in that: The bottom of the drive ring (61) is provided with a support ring (62), which is coaxially fixedly sleeved on the outside of the exhaust pipe (6). The bottom of the drive ring (61) is slidably connected to the support ring (62). The outer side wall of the drive ring (61) and the support ring (62) in sliding contact is fixed with a limit post (613). The outer side wall of the support ring (62) is provided with a limit groove. The limit post (613) is inserted and slidably connected in the limit groove to limit the angle of rotation of the drive ring (61).

3. The RCO catalytic combustion device for waste gas treatment according to claim 1, characterized in that: The connecting rod (611) is connected to the top of the corresponding guide plate (16) through the damping component (63). The damping component (63) includes a damping cylinder (631) and a piston. The piston is slidably connected inside the damping cylinder (631). The damping cylinder (631) is hinged to the bottom of the connecting rod (611). The piston is hinged to the top of the corresponding guide plate (16) through the piston rod (632). The piston has a throttling hole through it. The damping cylinder (631) is filled with damping oil.

4. The RCO catalytic combustion device for waste gas treatment according to claim 1, characterized in that: The upward-sloping side of the air deflector (16) is configured as an outwardly convex curved surface, and the downward-sloping side of the air deflector (16) is configured as a flat plane. The upward-sloping side of all the air deflectors (16) covers the entire annular air intake (15).

5. The RCO catalytic combustion device for waste gas treatment according to claim 1, characterized in that: The bottom opening of the cyclone separator (5) is connected to a collection box (13), which is used to collect the catalytic particles separated in the cyclone separator (5).

6. The RCO catalytic combustion device for waste gas treatment according to claim 1, characterized in that: Along the flow direction of the airflow, the airflow channel inside the preheating module (2) or the electric heating module (3) is configured as an S-shaped flow channel to extend the heating path of the exhaust gas.

7. The RCO catalytic combustion device for waste gas treatment according to claim 1, characterized in that: A temperature sensor (14) is provided between the reaction zone and the separation zone in the catalytic combustion chamber (1) to monitor the temperature of the gas flow from the catalytic combustion bed (4) in real time.

Images