High-efficiency energy-saving RTO combustion device

Abstract

The utility model relates to industrial waste gas treatment technical field especially, is involved in a kind of high-efficiency energy-saving RTO combustion device, including furnace body, the furnace body inner cavity is sequentially provided with combustion chamber, heat storage room and inlet-outlet air chamber from top to bottom, airflow distribution device is arranged in the inlet-outlet air chamber, airflow distribution device is equipped in the inlet-outlet air chamber, the airflow distribution device includes: airflow partition plate, inlet-outlet air chamber is separated into first partition chamber and second partition chamber, the partition plate is formed narrow slit type airflow passage between furnace body side wall;Multiple airflow spoiler of oblique setting, the airflow spoiler is penetrated airflow partition plate and extends to first partition chamber and second partition chamber inside;Telescopic drive component is used for adjusting airflow passage size, telescopic drive component is connected with airflow partition plate transmission.This utility model passes through the setting airflow distribution device dynamic regulation airflow distribution, optimizes ceramic heat storage bed temperature uniformity, to effectively improve thermal efficiency and purification rate.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, and in particular to a high-efficiency and energy-saving RTO combustion device. Background Technology

[0002] Regenerative Thermal Oxidizers (RTOs) are highly efficient heat recovery devices widely used in industrial waste gas treatment. Their core principle involves the alternating absorption and release of heat by a ceramic regenerator bed to heat organic waste gas to a high temperature (typically ≥760℃) for oxidation and decomposition, thus purifying the waste gas. Traditional RTO devices typically use fixed airflow switching valves to control the flow direction of waste gas and purified gas, and improve thermal efficiency through the periodic heat storage and release of the ceramic regenerator.

[0003] However, traditional RTOs rely on fixed-structure inlet and outlet chambers for airflow distribution. When exhaust gas enters the regenerator, it tends to concentrate in the central area, resulting in excessively high temperatures in the center of the ceramic regenerator bed while the peripheral areas receive insufficient heat. This uneven distribution reduces the utilization rate of the regenerator and may shorten the lifespan of the ceramic body due to localized overheating. In addition, during airflow switching, insufficient sealing of the switching valve may cause some incompletely oxidized exhaust gas to directly mix into the purified gas (i.e., "gas leakage"), affecting purification efficiency.

[0004] In order to ensure the stability of airflow switching, existing regenerative thermal oxidation devices typically have fixed airflow channel sizes, making it impossible to dynamically adjust the airflow speed and distribution according to changes in waste gas flow or temperature. Furthermore, during repeated heat storage and release processes, uneven airflow distribution in multi-layer honeycomb ceramic regenerative beds can easily lead to axial and radial temperature gradients, resulting in decreased thermal efficiency and requiring additional fuel to supplement heat, thus increasing energy consumption. Utility Model Content

[0005] In order to address the technical deficiencies mentioned in the background art, the purpose of this utility model is to provide a high-efficiency and energy-saving RTO combustion device, which aims to solve the problems of existing regenerative combustion devices being unable to adjust the gas flow rate and having uneven heat distribution in the ceramic regenerative bed during gas flow switching. By dynamically adjusting the gas flow distribution, the temperature uniformity of the ceramic regenerative bed is optimized, thereby improving thermal efficiency and purification rate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-efficiency and energy-saving RTO combustion device includes a furnace body. The furnace body cavity has a combustion chamber, a regenerator chamber, and an inlet / outlet gas chamber arranged sequentially from top to bottom. An airflow distribution device is installed in the inlet / outlet gas chamber. The airflow distribution device includes:

[0008] An airflow partition plate divides the inlet and outlet air chambers into a first partition chamber and a second partition chamber, and a slit-type airflow channel is formed between the partition plate and the side wall of the furnace body.

[0009] Multiple obliquely arranged airflow spoilers penetrate the airflow partition plate and extend into the first partition cavity and the second partition cavity;

[0010] A telescopic drive assembly is used to adjust the size of the airflow channel, and the telescopic drive assembly is connected to the airflow partition plate in a driving connection.

[0011] Preferably, the airflow partition plate is composed of a fixed plate and an extension plate stacked on top of each other. The fixed plate is fixedly connected to the airflow baffle plate, and the top of the fixed plate is coated with a heat radiation reflective layer. The extension plate is circumferentially disposed at the bottom end of the fixed plate, and the extension plate and the fixed plate are slidably connected by a telescopic drive assembly.

[0012] Preferably, the telescopic drive assembly includes a rotating base, a telescopic slide rail, a hinge rod, and a driver. The rotating base is fixedly connected to the bottom end of the airflow partition plate, and the rotating base is rotatably connected to the driver. The hinge rod is distributed circumferentially along the rotating base, with one end movably connected to the rotating base and the other end fixedly connected to the extension plate. The telescopic slide rail is arranged parallel to the fixed plate and the extension plate. The driver drives the rotating base to rotate, so that the hinge rod drives the extension plate to slide and extend along the telescopic slide rail.

[0013] Preferably, the heat storage chamber is provided with a ceramic heat storage bed, which is composed of a multi-layered honeycomb structure of ceramic bodies. A heat-conducting plate is provided between the top of the ceramic heat storage bed and the combustion chamber, and the heat-conducting plate is evenly and densely distributed with multiple heat-conducting holes.

[0014] Preferably, the combustion chamber is located at the top of the ceramic regenerator bed, and a burner is installed inside the combustion chamber. The burner is fixed to the top of the furnace body, and an igniter is installed on one side of the burner.

[0015] Preferably, the air inlet and outlet chambers are symmetrically provided with air inlets and exhaust outlets. The air inlets are connected to an external induced draft fan via an air inlet pipe, and the exhaust outlets are connected to an external suction fan via an exhaust pipe.

[0016] Preferably, the first partition cavity is provided with a permeation plate for permeating gas, and one side of the permeation plate abuts against the bottom end of the ceramic regenerator bed.

[0017] Preferably, the second partition cavity has a funnel-shaped structure, and a switching valve for controlling air intake or exhaust is provided in the second partition cavity. The switching valve is connected to the air intake port and the exhaust port respectively.

[0018] In summary, the beneficial effects of this utility model are as follows:

[0019] This invention adjusts the size of the airflow channel through a telescopic drive component, balancing the airflow speed and flow rate to avoid excessive heat loss in the center of the ceramic regenerator bed and improve the temperature distribution. Simultaneously, the inclined airflow baffle disperses the airflow, reducing the velocity difference between the center and edges, thus ensuring uniform heat distribution within the ceramic regenerator bed and preventing energy waste, thereby saving energy. Furthermore, during airflow switching, an airflow separator separates the ceramic regenerator from the switching valve, effectively preventing unpurified waste gas from entering the clean gas, ensuring sufficient oxidation and decomposition of the waste gas and improving its purification effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-efficiency and energy-saving RTO combustion device of this utility model;

[0021] Figure 2 This is a top view of the high-efficiency and energy-saving RTO combustion device of this utility model;

[0022] Figure 3 This is a three-dimensional sectional view of the high-efficiency and energy-saving RTO combustion device of this utility model;

[0023] Figure 4 yes Figure 2 A cross-sectional view of the AA plane;

[0024] Figure 5 yes Figure 2 A cross-sectional view of the BB plane.

[0025] Explanation of the reference numerals in the figure:

[0026] 1. Furnace body; 11. Combustion chamber; 12. Regenerator chamber; 13. Inlet and outlet chambers; 131. Inlet; 132. Outlet; 2. Airflow distribution device; 21. Airflow partition plate; 211. Fixing plate; 212. Expansion plate; 22. Airflow baffle plate; 23. Telescopic drive assembly; 231. Rotary seat; 232. Telescopic slide rail; 233. Hinge rod; 234. Driver; 3. First partition chamber; 4. Second partition chamber; 5. Airflow channel; 6. Ceramic regenerator bed; 7. Heat-conducting plate; 71. Heat-conducting hole; 8. Burner; 81. Ignition device; 9. Permeation plate; 10. Switching valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0028] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0030] The following is in conjunction with the appendix Figure 1-5 The present invention will provide a more detailed description of an embodiment of a high-efficiency and energy-saving RTO combustion device.

[0031] Example 1

[0032] A highly efficient and energy-saving RTO combustion device, such as Figures 1 to 3 As shown, the furnace includes a furnace body 1. The furnace body 1 has a combustion chamber 11, a heat storage chamber 12, and an inlet / outlet air chamber 13 arranged sequentially from top to bottom within its inner cavity. An airflow distribution device 2 is installed within the inlet / outlet air chamber 13. The airflow distribution device 2 includes an airflow partition plate 21, an airflow baffle plate 22, and a telescopic drive assembly 23. The airflow partition plate 21 divides the inlet / outlet air chamber 13 into a first partition chamber 3 and a second partition chamber 4. A slit-shaped airflow channel 5 is provided between the airflow partition plate 21 and the side wall of the furnace body 1, connecting the first partition chamber 3 and the second partition chamber 4. Multiple airflow baffle plates 22 are provided, arranged obliquely, and axially penetrate the airflow partition plate 21, extending into the first partition chamber 3 and the second partition chamber 4. The telescopic drive assembly 23 is connected to the airflow partition plate 21 to drive the airflow partition plate 21 to extend and retract, adjusting the size of the airflow channel 5.

[0033] Specifically, the furnace body 1 of the high-efficiency and energy-saving RTO combustion device is made of high-temperature resistant stainless steel. Internally, it consists of a combustion chamber 11, a regenerator chamber 12, and an inlet / outlet gas chamber 13, with each chamber connected by a flange seal. Two sets of airflow baffles 22 are provided, each set consisting of three 3000mm long 304 stainless steel plates welded at a 30° angle to the airflow partition plate 21. The spacing between adjacent airflow baffles 22 is 1000mm, and both ends of the baffles 22 extend 1500mm into the first partition chamber 3 and the second partition chamber 4, respectively, to disperse airflow vortices. Through the telescopic drive assembly 23, the airflow channel 5 is dynamically adjusted, reducing the temperature difference between the center and edge of the ceramic regenerator bed 6 from 100℃ in traditional devices to below 20℃; the heat recovery efficiency is increased from 90% to 95%, gas consumption is reduced by 15%, and the VOCs purification rate is increased from 97% to 99.5%.

[0034] In this embodiment, as Figure 3 As shown, the airflow partition plate 21 is composed of a fixed plate 211 and an extension plate 212 stacked on top of each other. The fixed plate 211 is fixedly connected to the airflow spoiler plate 22, and the top of the fixed plate 211 is coated with a heat radiation reflective layer. The extension plate 212 is circumferentially disposed at the bottom end of the fixed plate 211, and the extension plate 212 and the fixed plate 211 are slidably connected by a telescopic drive assembly 23.

[0035] Specifically, the airflow partition plate 21 is made of high-temperature resistant alloy steel with a thickness of 100mm, and includes a fixed plate 211 and an extension plate 212. The fixed plate 211 is welded to the central axis of the furnace body 1, and its top is coated with an aluminum-based heat radiation reflective coating with a thickness of 0.5mm to reduce heat loss downwards; the extension plate 212 is a ring structure, fitted at the bottom of the fixed plate 211, and is slidably connected to the fixed plate 211 through the telescopic drive assembly 23, with a sliding stroke of 0-2000mm, and the width of the adjustable airflow channel 5 is 50-500mm.

[0036] In this embodiment, as Figure 3 As shown, the telescopic drive assembly 23 includes a rotating base 231, a telescopic slide rail 232, a hinge rod 233, and a driver 234. The rotating base 231 is fixedly connected to the bottom end of the airflow partition plate 21, and the rotating base 231 is rotatably connected to the driver 234. The hinge rod 233 is distributed circumferentially along the rotating base 231, and one end of the hinge rod 233 is movably connected to the rotating base 231, while the other end is fixedly connected to the extension plate 212. The telescopic slide rail 232 is arranged parallel to the fixed plate 211 and the extension plate 212. The driver 234 drives the rotating base 231 to rotate, so that the hinge rod 233 drives the extension plate 212 to slide and extend along the telescopic slide rail 232.

[0037] Specifically, the driver 234 in the telescopic drive assembly 23 can be a servo motor or other drive elements with the same function. In this embodiment, the driver 234 is preferably a servo motor. The output end of the servo motor is connected to the rotating base 231 through a coupling, and four sets of hinge rods 233 are evenly distributed around the circumference of the rotating base 231. Each set of hinge rods 233 is hinged to the connecting lug plate at the bottom of the extension plate 212 through a universal joint. When the servo motor drives the rotating base 231 to rotate clockwise, the hinge rods 233 push the extension plate 212 to slide inward along the telescopic slide rail 232, thereby increasing the distance between the extension plate 212 and the side wall of the furnace body 1, and thus expanding the airflow channel 5. When the servo motor drives the rotating base 231 to rotate counterclockwise, the channel contracts. This allows it to be balanced according to the airflow speed and flow rate, avoiding the problem of excessive heat loss in the central part of the ceramic regenerator bed 6, and improving the temperature distribution of the ceramic regenerator bed 6, reducing heat loss.

[0038] In this embodiment, a ceramic heat storage bed 6 is provided in the heat storage chamber 12. The ceramic heat storage bed 6 is composed of a multi-layer honeycomb structure of ceramic bodies. A heat conduction plate 7 is provided between the top of the ceramic heat storage bed 6 and the combustion chamber 11. A plurality of heat conduction holes 71 are evenly distributed on the heat conduction plate 7.

[0039] Specifically, the ceramic regenerator bed 6 is composed of six layers of stacked honeycomb ceramic bodies. Each layer measures 2m × 2m × 0.5m, with a pore size of 50mm × 50mm, and is made of cordierite. The layers are separated by high-temperature resistant ceramic fiber gaskets, forming a meandering airflow channel. The heat-conducting plate 7 is made of a 150mm thick nickel-based high-temperature alloy plate, with uniformly spaced 30mm diameter heat-conducting holes 71 at 10mm intervals. The heat-conducting plate 7 is bolted to the top of the regenerator chamber 12, and a 10mm thick ceramic fiber insulation layer is filled between it and the bottom plate of the combustion chamber 11.

[0040] In this embodiment, the combustion chamber 11 is located at the top of the ceramic regenerator bed 6, and a burner 8 is provided inside the combustion chamber 11. The burner 8 is fixed to the top of the furnace body 1, and an igniter 81 is provided on one side of the burner 8.

[0041] Specifically, burner 8 is a natural gas burner with a maximum power of 500kW, equipped with a proportional regulating valve that can automatically adjust the gas flow rate according to the exhaust gas concentration. Ignition device 81 is a high-voltage electric arc ignition device located 100mm to the right of burner 8. Ignition device 81 ignites the mixture of air and gas, thereby achieving the effect of high-temperature combustion purification of exhaust gas.

[0042] In this embodiment, the air inlet 131 and the exhaust outlet 132 are symmetrically provided on the air inlet and outlet chamber 13. The air inlet 131 is connected to the external fan through an air inlet pipe, and the exhaust outlet 132 is connected to the external suction fan through an exhaust pipe.

[0043] Specifically, under the action of the induced draft fan, the exhaust gas enters the heat storage chamber through the intake pipe and the intake port 131. At this time, the ceramic heat storage bed 6 preheats the exhaust gas. The preheated exhaust gas enters the combustion chamber 11 through the heat conduction hole 71. At this time, the gas is injected into the burner 8 through the gas pipe and ignited by the igniter 81, thereby catalytically burning the preheated exhaust gas. The treated exhaust gas is discharged through the exhaust pipe.

[0044] In this embodiment, a permeation plate 9 for permeating gas is provided in the first partition cavity 3, and one side of the permeation plate 9 abuts against the bottom end of the ceramic regenerative bed 6.

[0045] Specifically, the permeation plate 9 is located at the top of the first partition chamber 3. It is a porous ceramic plate with a thickness of 50 mm and an average pore diameter of 20 mm, used to evenly distribute the airflow entering the ceramic regenerator bed 6.

[0046] In this embodiment, as Figure 4 As shown, the second partition chamber 4 has a funnel-shaped structure, and a switching valve 10 for controlling the intake or exhaust of air is provided in the second partition chamber 4. The switching valve 10 is connected to the intake port 131 and the exhaust port 132 respectively.

[0047] Specifically, the switching valve 10 is a pneumatic butterfly valve and is located at the funnel-shaped bottom of the second partition chamber 4. The switching valve 10 is controlled to open and close by an external PLC controller, and the switching valve 10 is electrically linked to the driver 234 so that it can switch airflow according to the action of the driver 234.

[0048] Example 2

[0049] In another embodiment, a temperature sensor can be installed inside the furnace body 1, and the telescopic drive assembly 23 can be linked with the temperature sensor. Specifically, K-type thermocouples are embedded in the upper, middle, and lower layers of the ceramic regenerator bed 6 in the regenerator chamber 12 to monitor the temperature distribution in real time. When the temperature deviation in a certain area exceeds a set threshold, the extension amount of the expansion plate 212 is locally adjusted by using an external PLC to control the driver 234. For example, if the temperature of the upper layer is too high, the expansion plate 212 corresponding to that area is expanded to reduce the width of the airflow channel 5 and reduce the flow velocity at that point, thereby achieving a dynamic balance in the airflow distribution. Conversely, the expansion plate 212 is retracted to increase the width of the airflow, thereby increasing the airflow velocity in the edge area and accelerating the combustion treatment of waste gas.

[0050] like Figure 5 As shown, taking a three-chamber regenerative thermal oxidizer as an example, the solid arrows in the figure represent the air inlet path, and the dashed arrows represent the air outlet path. Its working process is as follows:

[0051] In the intake stage: exhaust gas enters the second partition chamber 4 through the intake port 131, and the switching valve 10 closes the exhaust port 132; the servo motor drives the expansion plate 212 to retract, the airflow channel 5 expands to 40mm, and the exhaust gas is dispersed by the airflow baffle plate 22 and then evenly enters the left ceramic regenerator bed 6 through the permeation plate 9.

[0052] Preheating and Combustion: The exhaust gas is heated to 750°C in the ceramic regenerator bed 6 on the left side, and then enters the combustion chamber 11 where the burner 8 provides additional heat. After the VOCs are oxidized and decomposed at 850°C, they are cooled and discharged through the ceramic regenerator bed 6 on the right side.

[0053] Airflow switching: After running for 30 minutes, the PLC controller controls the switching valve 10 to switch direction, the driver 234 contracts the airflow channel by 5 to 10 mm, the airflow direction is reversed, the left ceramic heat storage bed 6 turns to exhaust heat storage, and the right ceramic heat storage bed 6 turns to intake preheating.

[0054] Exhaust and heat storage: The purified high-temperature gas is returned to the left ceramic heat storage bed 6 for cooling. The heat is absorbed by the ceramic body. The gas cooled to 150°C is switched to exhaust port 132 through switching valve 10 and discharged.

[0055] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency energy-saving RTO combustion device, comprising a furnace body, an inner cavity of the furnace body is sequentially provided with a combustion chamber, a heat storage chamber and an inlet and outlet chamber from top to bottom, characterized in that, The air inlet and outlet chamber is provided with an air flow distribution device, the air flow distribution device comprises: An air flow partition plate separates the air inlet and outlet chamber into a first partition chamber and a second partition chamber, and a slit type air flow channel is formed between the partition plate and the side wall of the furnace body; A plurality of air flow spoiler plates are arranged obliquely, the air flow spoiler plates penetrate the air flow partition plate and extend into the first partition chamber and the second partition chamber; A telescopic drive assembly is used to adjust the size of the air flow channel, and the telescopic drive assembly is in transmission connection with the air flow partition plate.

2. The energy efficient RTO combustion device as claimed in claim 1, wherein, The air flow partition plate is composed of a fixed plate and an expansion plate arranged in an upper-lower stacked manner, the fixed plate is fixedly connected to the air flow spoiler plate, and the top of the fixed plate is coated with a heat radiation reflection layer; the expansion plate is circumferentially arranged at the bottom end of the fixed plate, and the expansion plate and the fixed plate are in sliding connection through the telescopic drive assembly.

3. The energy efficient RTO combustion device as claimed in claim 1, wherein, The telescopic drive assembly comprises a rotating seat, telescopic sliding rails, a hinged rod and a driver, the rotating seat is fixedly connected to the bottom end of the air flow partition plate, and the rotating seat is in rotational connection with the driver; the hinged rod is circumferentially distributed along the rotating seat, one end of the hinged rod is in movable connection with the rotating seat, and the other end is fixedly connected to the expansion plate; the telescopic sliding rails are arranged in parallel on the fixed plate and the expansion plate; The driver drives the rotating seat to rotate, so that the hinged rod drives the expansion plate to slide and expand along the telescopic sliding rails.

4. The energy efficient RTO combustion device of claim 3, wherein, A ceramic heat storage bed is arranged in the heat storage chamber, the ceramic heat storage bed is composed of a plurality of layers of honeycomb structure ceramic bodies, a heat conducting plate is arranged between the top end of the ceramic heat storage bed and the combustion chamber, and a plurality of heat conducting holes are uniformly and densely arranged on the heat conducting plate.

5. The energy efficient RTO combustion device of claim 4, wherein, The combustion chamber is located at the top end of the ceramic heat storage bed, and a burner is arranged in the combustion chamber, the burner is fixed to the top end of the furnace body, and a lighter is arranged on one side of the burner.

6. The energy efficient RTO combustion device of claim 5, wherein, Air inlets and air outlets are symmetrically arranged on the air inlet and outlet chamber, an air inlet pipe is arranged outside the air inlet to connect an air inducing fan, and an air outlet pipe is arranged outside the air outlet to connect an air suction fan.

7. The energy efficient RTO combustion device of claim 6, wherein, A permeation plate for permeating gas is arranged in the first partition chamber, and one side of the permeation plate abuts against the bottom end of the ceramic heat storage bed.

8. The energy efficient RTO combustion device of claim 7, wherein, The second partition chamber has a funnel structure, and a switching valve for controlling air inlet or air outlet is arranged in the second partition chamber, and the switching valve is in communication with the air inlet and the air outlet respectively.

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