Anti-corrosion structure applied to RTO furnace

Abstract

The utility model belongs to the technical field of RTO (regenerative thermal oxidizer) furnaces, and particularly relates to an anti-corrosion structure applied to an RTO furnace, which comprises a lower support frame and a lift valve assembly, a lower chamber assembly is fixed on the inner side of the lower support frame, the top of the lower chamber assembly is connected with a plurality of regenerative chamber assemblies, and a combustion chamber assembly is arranged at the top of each regenerative chamber assembly. The lower cavity assembly is communicated with the interior of the heat storage chamber assembly and comprises a base fixed to the top of a lower supporting frame, a hollowed-out frame is arranged on the inner side of the base, the upper surface of the base is covered with a sealing plate, the interior of the sealing plate is hollowed out, a ceramic grating is further installed on the inner side of the base and arranged above the sealing plate, and the ceramic grating is arranged on the upper portion of the ceramic grating. The bottom of the base is provided with a conical cavity, the conical cavity is of a conical structure with the large upper portion and the small lower portion, the lifting valve is arranged above an inlet of a pipeline furnace body, and when accumulated liquid is generated in the lifting valve, the accumulated liquid can flow into the conical cavity along with a pipeline, and then the accumulated liquid and condensate water are discharged together.

Description

Technical Field

[0001] This utility model belongs to the field of RTO furnace technology, specifically relating to an anti-corrosion structure applied to RTO furnaces. Background Technology

[0002] A regenerative thermal oxidizer (RTO) is a highly efficient and environmentally friendly device for treating industrial waste gases (VOCs). The waste gas first enters a regenerator chamber, where it is preheated to near combustion temperature by a ceramic packing bed. The ceramic regenerator filling the chamber stores the heat from the purified flue gas in the previous cycle, rapidly increasing the waste gas temperature and significantly reducing fuel consumption for subsequent combustion. The waste gas then enters the combustion chamber, where at a high temperature of 760℃-1000℃, organic pollutants react with oxygen to produce harmless carbon dioxide and water vapor. The high-temperature gas produced during oxidation leaves the combustion chamber and enters another regenerator chamber, where it transfers heat to the regenerator while its own temperature decreases, finally being discharged through a chimney.

[0003] Existing ROT furnaces, when exposed to gases containing corrosive substances, will corrode the flow-through parts of the equipment, thus affecting its service life. Corrosion is mainly caused by two factors: 1. Direct impact from corrosive exhaust gases. 2. Corrosive condensate produced after the exhaust gases pass through the equipment's outer wall or undergo natural cooling; this corrosive condensate often has the greatest impact on the equipment. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a corrosion-resistant structure for RTO furnaces, which can directly discharge the corrosive condensate produced, preventing internal damage due to corrosion.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A corrosion-resistant structure for an RTO furnace includes a lower support frame and a lifting valve assembly. A lower chamber assembly is fixed to the inner upper side of the lower support frame. A regenerator assembly is connected to the top of the lower chamber assembly. Combustion chamber assemblies are provided on the top of multiple regenerator assemblies. The lower chamber assembly and the regenerator assembly are internally connected. The lower chamber assembly includes a base fixed to the top of the lower support frame. A perforated frame is provided on the inner side of the base. A sealing plate is covered on the upper surface of the base. The sealing plate is perforated inside. A ceramic grid is also installed on the inner side of the base and is placed above the sealing plate. A conical chamber is installed at the bottom of the base. The conical chamber has a conical structure that is wider at the top and narrower at the bottom. A connecting gas pipe and an extension pipe are distributed and connected to both sides of the conical chamber. A drain pipe is connected to the bottom of the conical chamber through a flange and bolts. Multiple drain pipes extend outward to the outside of the lower support frame. The drain pipes are used to drain corrosive condensate from the conical chamber.

[0007] Furthermore, an inspection door is bolted to the end of the extension tube, and an air inlet pipe is connected to the end of the docking air pipe via a flange. Both the docking air pipe and the extension tube are connected to the interior of the conical cavity, and the air inlet pipe extends to the outside of the lower support frame.

[0008] Furthermore, a lift valve assembly is connected to the end of the intake pipe, and multiple lift valve assemblies are interconnected through pipes. The lift valve assembly is used to control the intake switch.

[0009] Furthermore, the lift valve assembly includes an upper valve body and a lower valve body, which are tightly connected by bolts. A mating interface is provided on one side of the upper valve body, and adjacent lift valve assemblies are connected through the mating interface and the cooperation of pipes. The bottom of the lower valve body is connected to the air intake pipe through a pipe.

[0010] Furthermore, a control cylinder is provided at the top of the upper valve body, and a valve core is installed downward at the output end of the control cylinder, with the valve core located at the bottom of the lower valve body.

[0011] Furthermore, the outer surfaces of the base and the conical chamber are partially coated with a polytetrafluoroethylene coating.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The internal structure exposed to corrosive gases is coated with a polytetrafluoroethylene coating to improve the corrosion resistance of the internal structure and thus increase the service life of the equipment.

[0013] 2. Place the lift valve above the inlet of the pipeline furnace body. When liquid accumulates inside the lift valve, it can flow into the conical chamber through the pipeline and then be discharged together with the condensate.

[0014] 3. The conical chamber in the RTO, which is wider at the top and narrower at the bottom, allows condensate to be collected downwards and then discharged naturally, without affecting the RTO's performance and ensuring stable operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the ROT furnace body of this utility model;

[0016] Figure 2 This is a front view structural diagram of the present utility model;

[0017] Figure 3 This is a schematic diagram of the right-side structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the lower support frame installation structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the lower chamber assembly structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the lower chamber explosion structure of this utility model;

[0021] Figure 7 This is a front view schematic diagram of the lower chamber structure of this utility model;

[0022] Figure 8 This is a three-dimensional structural diagram of the lift valve of this utility model;

[0023] Figure 9 This is a cross-sectional view of the lifting valve of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Lift valve assembly; 11. Upper valve body; 12. Lower valve body; 13. Connecting port; 14. Control cylinder; 15. Valve core; 2. Intake pipe; 3. Lower support frame; 4. Lower chamber assembly; 41. Base; 42. Sealing plate; 43. Ceramic grille; 44. Conical chamber; 45. Connecting air pipe; 46. Extension pipe; 47. Inspection door; 48. Drain pipe; 5. Regenerator assembly; 6. Combustion chamber assembly. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] Reference 1- Figure 7 As shown, a corrosion-resistant structure for an RTO furnace includes a lower support frame 3 and a lifting valve assembly 1. A lower chamber assembly 4 is fixed to the upper inner side of the lower support frame 3. A heat storage chamber assembly 5 is connected to the top of the lower chamber assembly 4. A combustion chamber assembly 6 is provided on the top of multiple heat storage chamber assemblies 5. The lower chamber assembly 4 and the heat storage chamber assembly 5 are internally connected. Gas flows upward through the heat storage chamber assembly 5 into the combustion chamber 6. The condensate produced after combustion flows downward into the lower chamber assembly 4. The gas is discharged through the chimney. The lifting valve assembly 1 is switched so that the gas after combustion is discharged through another heat storage chamber for the next stage of gas intake, thereby realizing circulation.

[0028] Meal card Figures 5-7As shown, the lower chamber assembly 4 includes a base 41 fixed to the top of the lower support frame 3. A perforated frame is provided inside the base 41, and a sealing plate 42 is covered on the upper surface of the base 41 to prevent air leakage around the perimeter. The sealing plate 42 is perforated inside. A ceramic grid 43 is also installed inside the base 41, and the ceramic grid 43 is placed above the sealing plate 42. A conical chamber 44 is installed at the bottom of the base 41. The conical chamber 44 has a conical structure that is larger at the top and smaller at the bottom. The conical structure can concentrate the condensate generated above downwards. A connecting air pipe 45 and an extension pipe 46 are distributed and connected on both sides of the conical chamber 44. A drain pipe 48 is connected to the bottom of the conical chamber 44 through the cooperation of flanges and bolts. Multiple drain pipes 48 extend outwards to the outside of the lower support frame 3. The drain pipes 48 are used to drain the corrosive condensate in the conical chamber 44 to prevent the corrosive condensate from causing corrosion to the internal equipment.

[0029] refer to Figure 1 and Figure 2 As shown, an inspection door 47 is bolted to the end of the extension pipe 46, and an air inlet pipe 2 is connected to the end of the connecting air pipe 45 via a flange. Both the connecting air pipe 45 and the extension pipe 46 are connected to the interior of the conical chamber 44. The air inlet pipe 2 extends to the outside of the lower support frame 3 to facilitate connection to the external lift valve assembly 1.

[0030] refer to Figure 1 and Figure 8 As shown, the intake pipe 2 is connected to a lift valve assembly 1 at one end. Multiple lift valve assemblies 1 are interconnected by pipes. The lift valve assembly 1 is used to control the intake switch, so as to control the intake and exhaust of air through the lift valve, thereby realizing heating and heat storage cycle.

[0031] refer to Figure 8 and Figure 9 As shown, the lift valve assembly 1 includes an upper valve body 11 and a lower valve body 12. The upper valve body 11 and the lower valve body 12 are tightly connected by bolts. A connection interface 13 is provided on one side of the upper valve body 11. Two adjacent lift valve assemblies 1 are connected through the connection interface 13 and the pipe. The bottom of the lower valve body 12 is connected to the air intake pipe 2 through a pipe. A control cylinder 14 is provided on the top of the upper valve body 11. A valve core 15 is installed downward at the output end of the control cylinder 14. The valve core 15 is placed at the bottom of the lower valve body 12 to control whether the lift valve assembly 1 is connected to the air intake pipe 2 for air intake.

[0032] The base 41 and the conical chamber 44 are partially coated with polytetrafluoroethylene to improve corrosion resistance and extend the service life of the equipment.

[0033] The working principle of this utility model is as follows: During use, multiple control cylinders 14 are controlled by the system to control whether each pipe is inlet via valve core 15. The gas to be processed enters the intake pipe 2 through the lift valve assembly 1, and then flows upward into the combustion chamber assembly 6 through the lower chamber assembly 4 for combustion. Multiple lift valve assemblies 1 can control the gas to flow into the combustion chamber assembly 6 through different heat storage chamber assemblies 5 in sequence to achieve cyclic combustion. When the gas enters the lower chamber assembly 4, it enters the heat storage chamber assembly 5 through the connecting gas pipe 45, ceramic grid 43 and base 41 in sequence. During this process, the corrosive condensate generated by combustion will flow downward through the conical conical chamber 44 and concentrate at the bottom, and then be automatically discharged through the drain pipe 48 without affecting the performance of the RTO. Polytetrafluoroethylene is coated inside the conical chamber 44 and the base 41 to increase the corrosion resistance of the inner wall. Polytetrafluoroethylene can also be coated on the inner wall of the intake pipe 2 to improve the internal corrosion resistance of the intake pipe 2.

[0034] The lift valve assembly 1 that controls the gas inlet is placed outside the lower support frame 3, and the connection between the lift valve assembly 1 and the air inlet pipe 2 is located below. This structure allows residual liquid inside the lift valve assembly 1 to flow into the conical chamber 44 through the lower air inlet pipe 2, and then be discharged through the drain pipe 48, so as to prevent residual liquid inside the lift valve assembly 1.

[0035] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A corrosion protection structure applied to an RTO furnace, comprising a lower support frame (3) and a poppet valve assembly (1), characterized in that: The lower support frame (3) is internally provided with a lower chamber assembly (4), the top of the lower chamber assembly (4) is connected with a heat storage chamber assembly (5), a plurality of heat storage chamber assemblies (5) are provided with a combustion chamber assembly (6), the lower chamber assembly (4) and the heat storage chamber assembly (5) are internally through, the lower chamber assembly (4) comprises a base (41) fixed on the top of the lower support frame (3), the inner side of the base (41) is provided with a hollow frame, the upper surface of the base (41) is covered with a sealing plate (42), the inner part of the sealing plate (42) is hollow, the inner side of the base (41) is further provided with a ceramic grille (43), the ceramic grille (43) is arranged above the sealing plate (42), the bottom of the base (41) is provided with a conical chamber (44), the conical chamber (44) is in a conical structure with the top being large and the bottom being small, the two sides of the conical chamber (44) are connected with a butt joint air pipe (45) and an extension pipe (46), the bottom of the conical chamber (44) is connected with a drain pipe (48) through the cooperation of a flange and a bolt, a plurality of drain pipes (48) are all externally extended to the outside of the lower support frame (3), and the drain pipe (48) is used for discharging corrosive condensed water in the conical chamber (44).

2. The corrosion-proof structure applied to the RTO furnace according to claim 1, characterized in that: The end of the extension pipe (46) is provided with an inspection door (47) through a bolt, the end of the butt joint air pipe (45) is connected with an air inlet pipe (2) through a flange, and the butt joint air pipe (45) and the extension pipe (46) are internally through the conical chamber (44), and the air inlet pipe (2) is externally extended to the lower support frame (3).

3. The corrosion-proof structure applied to the RTO furnace according to claim 2, characterized in that: The end of the air inlet pipe (2) is connected with a poppet valve assembly (1), a plurality of poppet valve assemblies (1) are connected with each other through pipelines, and the poppet valve assembly (1) is used for controlling the opening and closing of air inlet.

4. The corrosion-proof structure applied to the RTO furnace according to claim 3, characterized in that: The poppet valve assembly (1) comprises an upper valve body (11) and a lower valve body (12), the upper valve body (11) and the lower valve body (12) are tightly connected through a bolt, one side of the upper valve body (11) is provided with a butt joint port (13), adjacent two poppet valve assemblies (1) are connected and communicated through the cooperation of the butt joint port (13) and the pipeline, and the bottom of the lower valve body (12) is communicated with the air inlet pipe (2) through a pipeline.

5. The corrosion-proof structure applied to the RTO furnace according to claim 4, characterized in that: The top of the upper valve body (11) is provided with a control air cylinder (14), the output end of the control air cylinder (14) is downwardly provided with a valve core (15), and the valve core (15) is arranged on the bottom of the lower valve body (12).

6. The corrosion-proof structure applied to the RTO furnace according to claim 1, characterized in that: The outer part of the base (41) and the conical chamber (44) is locally sprayed with a polytetrafluoroethylene coating.

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