RTO (Regenerative Thermal Oxidation) furnace

Abstract

The utility model discloses a regenerative thermal oxidizer (RTO), and particularly relates to the technical field of oxidizing furnaces, the RTO comprises an oxidizing mechanism, an exhaust component and an air inlet component, the exhaust component is arranged on the side surface of the oxidizing mechanism, and the air inlet component is arranged on one side, far away from the exhaust component, of the oxidizing mechanism; the oxidation mechanism comprises a heating assembly, a control assembly, a heat storage furnace and an oxidation reaction chamber, the oxidation reaction chamber is installed above the heat storage furnace, the heating assembly is installed on the outer wall of the heat storage furnace, the control assembly is installed above the oxidation reaction chamber, and when the temperature in the RTO heat storage type oxidation furnace is out of control due to too high temperature, the oxidation reaction chamber is opened. The resistance value of a negative temperature thermistor in the control assembly is continuously reduced due to temperature rise, and when the resistance value is reduced to a certain degree, the current intensity of a circuit where the thermistor is located is enough to enable a relay to close a circuit of an electromagnetic valve, so that the electromagnetic valve closes a fuel supply port of the gas burner.

Description

Technical Field

[0001] This utility model relates to the field of oxidation furnace technology, and more specifically, to an RTO regenerative oxidation furnace. Background Technology

[0002] An oxidizer is a device used for the oxidative heating treatment of waste gas. It oxidizes harmful organic gases by heating and oxidizing them into harmless inorganic gases such as water and carbon dioxide, which are then released into the air. During operation, workers guide the waste gas through the inlet and blower into the regenerator, which then enters the oxidation reaction chamber. There, oxidation and combustion occur, producing harmless inorganic gases, which are then discharged into the air through the exhaust chimney. Oxidizers are mainly used in chemical plants, pharmaceutical factories, and food factories, where the combustion and oxidation of harmful gases is required.

[0003] A search revealed that publication number CN221146556U discloses a turbulent structure for the regenerator chamber of a three-chamber RTO, including a furnace body. The furnace body is divided into an interconnected combustion chamber and three regenerator chambers. The combustion chamber is located above the regenerator chambers. An inlet / outlet switching pipe is provided at the bottom of the furnace body. The regenerator chambers are divided into a central regenerator chamber and two mirror-symmetrical left and right regenerator chambers. Each regenerator chamber contains a regenerator with pores. The pores on the regenerator in the central regenerator chamber are evenly distributed. The regenerator in the left and right regenerator chambers is divided into an inner zone and an outer zone. The pores on the regenerator in the inner zone are evenly distributed and have equal diameters. The pore diameters on the regenerator in the outer zone decrease from the outside to the inside, which increases the flow velocity of the exhaust gas in the left and right regenerator chambers. With this design, the residence time of the exhaust gas in the same specification RTO oxidation chamber will be extended by about 10%, and the exhaust gas oxidation efficiency will be increased by about 10% under the same temperature conditions, saving energy and reducing operating costs. In the process of realizing this utility model, the inventors discovered the following problems with the prior art:

[0004] The oxidation reaction environment inside existing RTO regenerative oxidizers is usually highly corrosive. Over time, corrosion may lead to furnace leakage, which not only affects the continuity of production but may also bring safety hazards, such as toxic gas leakage and fire risks. The oxidation reaction chamber of traditional RTO regenerative oxidizers sometimes suffers from temperature runaway due to excessively high internal temperature, which can damage the internal parts of the RTO regenerative oxidizer.

[0005] Therefore, an RTO regenerative oxidation furnace is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an RTO regenerative oxidation furnace to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an RTO regenerative oxidation furnace, comprising an oxidation mechanism, an exhaust component, and an intake component. The exhaust component is placed on the side of the oxidation mechanism, and the intake component is placed on the side of the oxidation mechanism away from the exhaust component. The oxidation mechanism includes a heating component, a control component, a regenerative furnace, and an oxidation reaction chamber. The oxidation reaction chamber is installed above the regenerative furnace, and the heating component is installed on the outer wall of the regenerative furnace. The control component is installed above the oxidation reaction chamber.

[0008] Preferably, the air intake assembly includes an air intake port, a blower, a first air intake valve, a second air intake valve, and a third air intake valve. The blower is installed on the side of the air intake port, the first air intake valve is placed on the side of the blower away from the air intake port, the second air intake valve is placed on top of the first air intake valve, and the third air intake valve is placed on the side of the second air intake valve.

[0009] Preferably, the exhaust assembly includes an exhaust chimney, a first exhaust valve, a second exhaust valve, and a third exhaust valve, wherein the first exhaust valve is placed on the side of the exhaust chimney, the second exhaust valve is placed above the first exhaust valve, and the third exhaust valve is placed on the side of the second exhaust valve.

[0010] Preferably, the heating assembly includes a heating wire, a heating tube, and a protective wire, wherein the heating wire is mounted on the inner diameter surface of the heating tube, and the protective wire is mounted on the side of the heating wire.

[0011] Preferably, the control component includes a thermistor, a relay, a battery, a solenoid valve, and a gas burner, with the gas burner placed on the side of the thermistor, the relay placed above the thermistor, the battery mounted on the side of the relay, and the solenoid valve placed on the side of the battery away from the relay.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] Compared with existing technologies, this RTO regenerative thermal oxidizer prevents oxidation of the pipe inner walls by coating the inner walls of the inlet and outlet components with epoxy asphalt. This prevents oxidation of the pipe inner walls by the exhaust gas when treating strong oxidizing organic gases. It also prevents oxidizing inorganic gases discharged from the regenerative furnace after treatment in the oxidation reaction chamber. This extends the service life of the RTO regenerative thermal oxidizer pipes and effectively prevents the risk of pipe damage due to oxidation by oxidizing gases.

[0014] Compared with existing technologies, this RTO regenerative thermal oxidizer uses a control component. When the temperature in the RTO regenerative oxidizer becomes uncontrollable due to excessive heat, the resistance of the negative temperature thermistor in the control component continuously decreases as the temperature rises. When the resistance decreases to a certain level, the current intensity in the circuit where the thermistor is located is sufficient to close the circuit of the solenoid valve via a relay. This causes the solenoid valve to automatically shut off the fuel supply port of the gas burner. Because the fuel supply port is closed, the gas burner will automatically shut down heating due to insufficient fuel, preventing damage to the internal components of the RTO regenerative oxidizer due to temperature runaway. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an RTO regenerative oxidation furnace according to this utility model.

[0016] Figure 2 This is a schematic diagram of the air intake assembly structure of an RTO regenerative oxidation furnace according to this utility model.

[0017] Figure 3 This is a schematic diagram of the exhaust assembly structure of an RTO regenerative thermal oxidizer according to this utility model.

[0018] Figure 4 This is a schematic diagram of the heating component structure of an RTO regenerative oxidation furnace according to this utility model.

[0019] Figure 5 This is a schematic diagram of the control component structure of an RTO regenerative thermal oxidizer according to this utility model.

[0020] The attached figures are labeled as follows: 1. Oxidation mechanism; 2. Exhaust assembly; 3. Intake assembly; 4. Heating assembly; 5. Control assembly; 6. Regenerator; 7. Oxidation reaction chamber; 8. Inlet; 9. Blower; 10. First intake valve; 11. Second intake valve; 12. Third intake valve; 13. Exhaust chimney; 14. First exhaust valve; 15. Second exhaust valve; 16. Third exhaust valve; 17. Heating wire; 18. Heating tube; 19. Protective wire; 20. Thermistor; 21. Relay; 22. Battery; 23. Solenoid valve; 24. Gas burner. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] As attachedFigures 1 to 5 The RTO regenerative thermal oxidizer shown includes an oxidation mechanism 1, an exhaust assembly 2, and an intake assembly 3. The exhaust assembly 2 is placed on the side of the oxidation mechanism 1, and the intake assembly 3 is placed on the side of the oxidation mechanism 1 away from the exhaust assembly 2. The oxidation mechanism 1 includes a heating assembly 4, a control assembly 5, a regenerative furnace 6, and an oxidation reaction chamber 7. The oxidation reaction chamber 7 is installed above the regenerative furnace 6, and the heating assembly 4 is installed on the outer wall of the regenerative furnace 6. The control assembly 5 is installed above the oxidation reaction chamber 7.

[0023] The oxidation mechanism 1 oxidizes the waste gas, turning it into harmless inorganic gas. The exhaust assembly 2 discharges the treated harmless gas. The intake assembly 3 transports the waste gas into the oxidation mechanism 1. The exhaust assembly 2 is placed on the side of the oxidation mechanism 1, and the intake assembly 3 is placed on the side of the oxidation mechanism 1 away from the exhaust assembly 2. The oxidation mechanism 1 includes a heating assembly 4, a control assembly 5, a regenerator 6, and an oxidation reaction chamber 7. The heating assembly 4 preheats the incoming waste gas. The control assembly 5 performs combustion oxidation on the waste gas in the oxidation reaction chamber 7 and can promptly shut off the feed port of the gas burner 24 when the temperature in the oxidation reaction chamber 7 becomes too high, causing the gas burner 24 to stop working. The regenerative thermal oxidizer 6 preheats the waste gas, while the oxidation reaction chamber 7 oxidizes it, turning it into harmless inorganic gas. The oxidation reaction chamber 7 is welded to the top of the regenerative thermal oxidizer 6, and a heating element 4 is bolted to the outer wall of the regenerative thermal oxidizer 6. A control element 5 is bolted to the top of the oxidation reaction chamber 7. When treating the waste gas, the worker needs to turn on the heating element 4 of the first regenerative thermal oxidizer 6 to heat it to approximately 70 degrees Celsius, preheating the incoming waste gas before it enters the oxidation reaction chamber 7. Then, the worker needs to thread the waste gas discharge pipe to the RTO regenerative oxidizer inlet 8 and turn on the gas burner 24. The waste gas will... The exhaust gas enters the RTO regenerative thermal oxidizer through inlet 8. The blower 9 adjacent to inlet 8 transports the exhaust gas to one side of the regenerative furnace 6 using airflow. At this point, the worker needs to open the second inlet valve 11, close the first inlet valve 10 and the third inlet valve 12, close the second exhaust valve 15 and the first exhaust valve 14, and open the third exhaust valve 16. The exhaust gas then enters the first regenerative furnace 6 through the first inlet valve 10. There, it is preheated and moves towards the oxidation reaction chamber 7. Upon reaching the oxidation reaction chamber 7, the exhaust gas stops for about one second in front of the flame emitted by the gas burner 24, causing it to oxidize into inorganic gases such as carbon dioxide and water, before moving towards the second regenerative furnace 6. The second regenerator 6 automatically begins preheating due to the high temperature of the inorganic gas. The inorganic gas also automatically cools down due to the decrease in ambient temperature and is discharged into the air through the exhaust chimney 13 via the third exhaust valve 16. After a period of time, the worker needs to cut off the supply of exhaust gas by turning off the gas burner 24, opening the first intake valve 10 and the third intake valve 12, closing the second intake valve 11, closing the third exhaust valve 16, and opening the first exhaust valve 14 and the second exhaust valve 15. Then the exhaust gas supply is resumed. At this time, the exhaust gas will enter the second regenerator 6 through the intake pipe, undergo oxidation reaction in the oxidation reactor, and finally be discharged into the exhaust chimney 13 through the first regenerator 6, and finally enter the air. The cycle continues in this manner. Example 2

[0024] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 5 As shown below, see details:

[0025] In a preferred embodiment, the air intake assembly 3 includes an air inlet 8, a blower 9, a first air intake valve 10, a second air intake valve 11, and a third air intake valve 12. The air inlet 8 can be connected to an exhaust gas pipe, allowing exhaust gas to enter the RTO regenerative thermal oxidizer through the air inlet 8. The blower 9 provides power for the movement of the exhaust gas. The first air intake valve 10, the second air intake valve 11, and the third air intake valve 12 can control which regenerative furnace 6 the exhaust gas enters. The blower 9 is bolted to the side of the air inlet 8. The first air intake valve 10 is placed on the side of the blower 9 away from the air inlet 8. The second air intake valve 11 is placed on top of the first air intake valve 10. The third air intake valve 12 is placed on the side of the second air intake valve 11.

[0026] In a preferred embodiment, the exhaust assembly 2 includes an exhaust chimney 13, a first exhaust valve 14, a second exhaust valve 15, and a third exhaust valve 16. The exhaust chimney 13 can discharge the treated exhaust gas into the air. The first exhaust valve 14, the second exhaust valve 15, and the third exhaust valve 16 can control which regenerator 6 the exhaust gas is discharged from. The first exhaust valve 14 is placed on the side of the exhaust chimney 13, the second exhaust valve 15 is placed above the first exhaust valve 14, and the third exhaust valve 16 is placed on the side of the second exhaust valve 15.

[0027] In a preferred embodiment, the heating assembly 4 includes a heating wire 17, a heating tube 18, and a protective wire 19. The heating wire 17 can heat the heat storage furnace 6, keeping the internal temperature of the heat storage furnace 6 at around 70 degrees Celsius. The heating tube 18 provides space for the heating wire 17. The protective wire 19 can protect the heating assembly 4 and automatically disconnects when the temperature of the heating assembly 4 is too high. The heating wire 17 is installed on the inner diameter surface of the heating tube 18, and the protective wire 19 is installed on the side of the heating wire 17. The heating wire 17 and the protective wire 19 are connected by a wire.

[0028] In a preferred embodiment, the control component 5 includes a thermistor 20, a relay 21, a battery 22, a solenoid valve 23, and a gas burner 24. The thermistor 20 changes with the temperature inside the oxidation reaction chamber 7. The relay 21 controls a large current change by changing a small current. When the current in the circuit containing the thermistor 20 increases, the relay 21 automatically closes the circuit containing the solenoid valve 23, causing the solenoid valve 23 to disconnect the gas supply port of the gas burner 24. The relay 21 is model HJR1-2CL-24V. The battery 22 provides power to the circuit containing the thermistor 20. The solenoid valve 23 controls the fuel supply port of the gas burner 24. The gas burner 24 can oxidize and burn the exhaust gas inside the oxidation reaction chamber 7 using fuel. The gas burner 24 is placed to the side of the thermistor 20, the relay 21 is placed above the thermistor 20, the battery 22 is installed to the side of the relay 21, and the solenoid valve 23 is placed on the side of the battery 22 away from the relay 21.

[0029] The working process of this utility model is as follows: First, the oxidation mechanism 1 can oxidize the waste gas, turning it into a harmless inorganic gas. The exhaust assembly 2 can discharge the treated harmless gas. The exhaust assembly 2 includes an exhaust chimney 13, a first exhaust valve 14, a second exhaust valve 15, and a third exhaust valve 16. The exhaust chimney 13 can discharge the treated waste gas into the air. The first exhaust valve 14, the second exhaust valve 15, and the third exhaust valve 16 can control which regenerator 6 the waste gas is discharged from. The first exhaust valve 14 is placed on the side of the exhaust chimney 13, and the second exhaust valve 15 is placed above the first exhaust valve 14. A third exhaust valve 16 is placed on the side of the second exhaust valve 15. The air intake assembly 3 can transport the exhaust gas to the oxidation mechanism 1. An exhaust assembly 2 is placed on the side of the oxidation mechanism 1. The air intake assembly 3 is placed on the side of the oxidation mechanism 1 away from the exhaust assembly 2. The oxidation mechanism 1 includes a heating assembly 4, a control assembly 5, a regenerative furnace 6, and an oxidation reaction chamber 7. The air intake assembly 3 includes an air inlet 8, a blower 9, a first air inlet valve 10, a second air inlet valve 11, and a third air inlet valve 12. The air inlet 8 can be connected to the exhaust gas pipe so that the exhaust gas can enter the RTO regenerative oxidizer through the air inlet 8. The blower 9 can provide power for the movement of the exhaust gas.

[0030] The first intake valve 10, the second intake valve 11, and the third intake valve 12 can control which regenerator 6 the exhaust gas enters. A blower 9 is bolted to the side of the intake port 8. The first intake valve 10 is placed on the side of the blower 9 away from the intake port 8. The second intake valve 11 is placed above the first intake valve 10. The third intake valve 12 is placed to the side of the second intake valve 11. The heating assembly 4 can preheat the exhaust gas that is initially entering. The heating assembly 4 includes a heating wire 17, a heating tube 18, and a protective wire 19. The heating wire 17 can heat the regenerator 6 to maintain the internal temperature of the regenerator 6 at about 70 degrees Celsius. The heating tube 18 provides space for the heating wire 17. The protective wire 19 can protect the heating assembly 4 and automatically disconnect when the temperature of the heating assembly 4 is too high. The heating wire 19 is installed on the inner diameter surface of the heating tube 18. 7. A protective wire 19 is installed on the side of the heating wire 17. The heating wire 17 and the protective wire 19 are connected by a wire. The control component 5 can perform combustion oxidation treatment on the exhaust gas of the oxidation reaction chamber 7. When the temperature in the oxidation reaction chamber 7 is too high, it can close the feed port of the gas burner 24 in time, so that the gas burner 24 stops working. The control component 5 includes a thermistor 20, a relay 21, a battery 22, a solenoid valve 23 and a gas burner 24. The thermistor 20 can change with the temperature inside the oxidation reaction chamber 7. The relay 21 can control the change of large current by changing small current. When the current in the circuit where the thermistor 20 is located increases, the relay 21 will automatically close the circuit where the solenoid valve 23 is located, so that the solenoid valve 23 disconnects the feed port of the gas burner 24. The model of the relay 21 is HJR1-2C L-24V.

[0031] Battery 22 powers the circuit of the thermistor 20. Solenoid valve 23 controls the fuel supply to the gas burner 24. The gas burner 24 uses fuel to oxidize and burn the exhaust gas inside the oxidation reaction chamber 7. The gas burner 24 is placed to the side of the thermistor 20, and a relay 21 is placed above it. Battery 22 is mounted to the side of the relay 21, and solenoid valve 23 is placed on the side of battery 22 furthest from relay 21. The regenerator 6 preheats the exhaust gas, and the oxidation reaction chamber 7 oxidizes and burns the exhaust gas, converting it into harmless inorganic gas. The oxidation reaction chamber 7 is welded onto the top of the regenerator 6, and heating components 4 are bolted to the outer wall of the regenerator 6. Control components 5 are bolted onto the top of the oxidation reaction chamber 7.

[0032] When workers treat the waste gas, they need to turn on the heating element 4 of the first regenerative thermal oxidizer 6 to heat the temperature of the first regenerative thermal oxidizer 6 to about 70 degrees Celsius. This allows the incoming waste gas to be preheated in the first regenerative thermal oxidizer 6 before entering the oxidation reaction chamber 7. Then, workers need to thread the waste gas discharge pipe to the air inlet 8 of the RTO regenerative thermal oxidizer and turn on the gas burner 24. The waste gas will enter the RTO regenerative thermal oxidizer through the air inlet 8. The blower 9 adjacent to the air inlet 8 will transport the waste gas to one side of the regenerative thermal oxidizer 6 by airflow. At this time, workers need to open the second air inlet valve 11 and close the first air inlet valve 10 and the third air inlet valve 12. The second exhaust valve 15 and the first exhaust valve 14 need to be closed, and the third exhaust valve 16 needs to be opened. The exhaust gas will enter the first regenerator 6 through the first intake valve 10. Then the exhaust gas is preheated in the first regenerator 6 and moves towards the oxidation reaction chamber 7. After reaching the oxidation reaction chamber 7, the exhaust gas will stop for about 1 second in front of the flame sprayed by the gas burner 24, so that the exhaust gas is oxidized into inorganic gases such as carbon dioxide and water, and then moves towards the second regenerator 6. The second regenerator 6 automatically starts to preheat due to the high temperature of the inorganic gas. The inorganic gas also automatically cools down due to the decrease in the surrounding temperature and is discharged into the air through the exhaust chimney 13 through the third exhaust valve 16.

[0033] After a period of time, the worker needs to cut off the supply of exhaust gas, shut down the gas burner 24, open the first intake valve 10 and the third intake valve 12, close the second intake valve 11, close the third exhaust valve 16, and open the first exhaust valve 14 and the second exhaust valve 15. Then the exhaust gas supply is resumed. At this time, the exhaust gas will enter the second regenerative furnace 6 through the intake pipe, and then undergo oxidation reaction in the oxidation reactor. Finally, it will be discharged into the exhaust chimney 13 through the first regenerative furnace 6 and then enter the air. The cycle continues in sequence. The above is the working principle of this RTO regenerative oxidizer.

Claims

1. An RTO regenerative thermal oxidizer, comprising an oxidation mechanism (1), an exhaust assembly (2), and an intake assembly (3), characterized in that: An exhaust assembly (2) is placed on the side of the oxidation mechanism (1), and an intake assembly (3) is placed on the side of the oxidation mechanism (1) away from the exhaust assembly (2). The oxidation mechanism (1) includes a heating assembly (4), a control assembly (5), a regenerator (6), and an oxidation reaction chamber (7). The oxidation reaction chamber (7) is installed above the regenerator (6), and the heating assembly (4) is installed on the outer wall of the regenerator (6). The control assembly (5) is installed above the oxidation reaction chamber (7).

2. The RTO regenerative thermal oxidizer according to claim 1, characterized in that: The air intake assembly (3) includes an air intake (8), a blower (9), a first air intake valve (10), a second air intake valve (11), and a third air intake valve (12). The blower (9) is installed on the side of the air intake (8), and the first air intake valve (10) is placed on the side of the blower (9) away from the air intake (8). The second air intake valve (11) is placed on top of the first air intake valve (10), and the third air intake valve (12) is placed on the side of the second air intake valve (11).

3. The RTO regenerative thermal oxidation furnace according to claim 2, characterized in that: The exhaust assembly (2) includes an exhaust chimney (13), a first exhaust valve (14), a second exhaust valve (15) and a third exhaust valve (16), with the first exhaust valve (14) placed on the side of the exhaust chimney (13), the second exhaust valve (15) placed above the first exhaust valve (14), and the third exhaust valve (16) placed on the side of the second exhaust valve (15).

4. The RTO regenerative thermal oxidation furnace according to claim 2, characterized in that: The heating assembly (4) includes a heating wire (17), a heating tube (18) and a protective wire (19), and the heating wire (17) is installed on the inner diameter surface of the heating tube (18), and the protective wire (19) is installed on the side of the heating wire (17).

5. The RTO regenerative thermal oxidation furnace according to claim 4, characterized in that: The control component (5) includes a thermistor (20), a relay (21), a battery (22), a solenoid valve (23), and a gas burner (24). The gas burner (24) is placed on the side of the thermistor (20), the relay (21) is placed above the thermistor (20), the battery (22) is installed on the side of the relay (21), and the solenoid valve (23) is placed on the side of the battery (22) away from the relay (21).

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