Round lifting type valve box and round RTO

Abstract

The utility model discloses a circular lift type valve box and a circular RTO, which comprise a valve group box body, and the valve group box body is provided with an air outlet, an air inlet, an air outlet channel, an air inlet channel and a purging channel; the air outlet is formed in one side of the valve bank box body and connected with the air outlet channel, the air inlet is formed in the other side of the valve bank box body and connected with the air inlet channel, and the purging channel is installed on the valve bank box body; a valve seat is further arranged on the valve bank box body, a lifting valve assembly is arranged on the valve seat, and the lifting valve assembly comprises an air cylinder, a transmission shaft, a valve plate and a sealing structure; the other end of the transmission shaft is connected with the valve plate; the sealing structure comprises a first sealing structure and a second sealing structure; the first sealing structure is arranged in a contact area of the valve plate and the valve group box body; the second sealing structure is installed on the outer side of the channel of the valve plate and forms secondary sealing through gas pressurization. The service life of the equipment is prolonged, and the maintenance frequency and cost are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment and is applicable to a low-leakage circular lift valve assembly that replaces the rotary valve / rotary blade of a rotary RTO. Specifically, it is a circular lift valve box and a circular RTO. Background Technology

[0002] Regenerative thermal oxidizers (RTOs) are highly efficient and energy-saving devices widely used in industrial waste gas treatment. They decompose volatile organic compounds (VOCs) and other harmful substances in waste gases through high-temperature oxidation, thereby reducing pollutant emissions. With increasingly stringent environmental policies, industrial enterprises are placing higher demands on the performance of waste gas treatment equipment, particularly in areas such as sealing performance, equipment stability, and airflow switching efficiency, to ensure continuous high efficiency and environmental compliance in waste gas treatment.

[0003] In existing technologies, regenerative thermal oxidizers typically use rotary valves to switch gas flow. However, traditional rotary valves usually employ a single mechanical seal, which, while meeting basic requirements in the short term, gradually reveals its limitations over long-term operation. Especially under high temperature and pressure conditions, the sealing surface is prone to wear or failure due to repeated switching operations, leading to gas leakage. Furthermore, the gas switching process can sometimes be delayed due to valve plate lag, preventing timely channel switching and affecting the complete oxidation of waste gas, ultimately resulting in reduced equipment efficiency.

[0004] In practical applications, these problems pose significant safety hazards and economic costs. Poor sealing system performance can lead to exhaust gas leaks, increasing the risk of hazardous substance emissions, while also corroding equipment components and accelerating the aging and damage of critical parts such as valve plates and sealing rings. Frequent equipment maintenance or component replacement will significantly increase operating costs and downtime, impacting production efficiency. Utility Model Content

[0005] To address the issues of gas leakage, accelerated component wear, and delayed airflow switching in regenerative thermal oxidizers operating under high temperature and high pressure environments due to traditional single-seal structures, which negatively impact equipment efficiency and operational stability, a circular lifting valve box and a circular RTO are provided.

[0006] This utility model is achieved through the following technical solution: a circular lifting valve box, including a valve assembly box body, wherein the valve assembly box body is provided with an air outlet, an air inlet, an air outlet channel, an air inlet channel, and a purge channel; the air outlet is located on one side of the valve assembly box body and connected to the air outlet channel, the air inlet is located on the other side of the valve assembly box body and connected to the air inlet channel, and the purge channel is installed on the valve assembly box body; the valve assembly box body is also provided with a valve seat, and the valve seat is provided with a lifting valve assembly, the lifting valve assembly including a cylinder, a drive shaft, a valve plate, and a sealing structure; one end of the drive shaft is connected to the cylinder, and the other end of the drive shaft is connected to the valve plate, the cylinder drives the valve plate to move up and down through the drive shaft to switch the chamber gas in the valve assembly box body; the sealing structure includes a first sealing structure and a second sealing structure; the first sealing structure is located in the contact area between the valve plate and the valve assembly box body; the second sealing structure is installed on the outside of the channel of the valve plate and forms a secondary seal by gas pressurization.

[0007] A further improvement of this utility model is that the first sealing structure includes a water ripple sealing surface and a filling sealing surface; the filling sealing surface is located at the edge of the valve plate and contacts the water ripple sealing surface.

[0008] A further improvement of this invention is that the material of the filling and sealing surface is rubber or polytetrafluoroethylene.

[0009] A further improvement of this utility model is that the second sealing structure includes an air seal channel and an air seal port. The air seal channel is installed below or around the outer edge of the valve plate and forms an annular air seal channel or an embedded sealing cavity.

[0010] A circular RTO includes a valve assembly housing and a combustion chamber, with the valve assembly housing mounted on the lower part of the combustion chamber.

[0011] A further improvement of this invention is that a burner for supplying combustion gases is provided at the upper part of the combustion chamber.

[0012] A further improvement of this invention is that it also includes a detection device, which is installed on the upper part of the combustion chamber and includes a temperature sensor and a pressure sensor.

[0013] As can be seen from the above technical solution, the beneficial effects of this utility model are as follows: The valve assembly housing is equipped with an air outlet, an air inlet, an air outlet channel, an air inlet channel, and a purging channel. Through the coordinated action of these channels, the equipment achieves precise airflow switching. During operation, the air outlet channel and the air inlet channel are connected to the air outlet and air inlet respectively, completing the airflow circulation. The purging channel plays an important role in the airflow switching stage, effectively avoiding airflow interference and contamination between different channels by removing residual gas in the channel. The lifting valve assembly on the valve assembly housing consists of a cylinder, a drive shaft, a valve plate, and a sealing structure. The up-and-down movement of the valve plate is driven by the cylinder through the drive shaft to achieve rapid switching between channels, ensuring efficient operation of the equipment during operation.

[0014] By employing a dual-layer sealing system, the equipment's airtightness is significantly improved. The first sealing structure consists of a water-ripple sealing surface and a filler sealing surface located in the contact area between the valve plate and the housing. These two components increase the contact area and provide elastic compression, achieving a stable basic seal and effectively preventing initial gas leakage. The second sealing structure, further enhancing the sealing effect, is located around the edge of the valve plate and consists of an annular gas seal channel and multiple distributed gas seal ports. When pressurized gas is ejected through the gas seal channel, it forms a continuous gas barrier along the edge of the valve plate, maintaining a high degree of airtightness even under dynamic conditions and preventing leakage risks under high temperature and high pressure conditions.

[0015] The combined effect of the sealing system and the purging channel eliminates the interference of residual gas on the system, fundamentally improving operational safety and preventing equipment failures or safety accidents caused by residual gas. Furthermore, the optimized sealing design significantly reduces wear on critical equipment components, thereby extending equipment lifespan and lowering maintenance frequency and costs. This technical solution not only improves equipment operating efficiency but also demonstrates high applicability in industrial scenarios such as high-temperature waste gas treatment and volatile organic compound purification, fully meeting the high standards of modern industrial environmental protection and safe production. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of the valve assembly box according to a specific embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of the first sealing structure according to a specific embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the second sealing structure according to a specific embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the regenerative combustion furnace structure according to a specific embodiment of the present invention.

[0021] In the attached diagram: 1. Air outlet; 2. Air inlet; 3. Air outlet passage; 4. Air inlet passage; 5. Purge passage; 6. Valve plate; 7. Cylinder; 8. Water ripple sealing surface; 9. Filling sealing surface; 10. Gas seal; 11. Burner. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] refer to Figure 1-3As shown, this utility model provides a circular lift valve box, particularly suitable for replacing low-leakage circular lift valve assemblies for rotary RTO rotary valves / rotary blades. It includes a valve assembly housing, on which are provided an outlet 1, an inlet 2, an outlet channel 3, an inlet channel 4, and a purge channel 5. The outlet 1 is located on one side of the valve assembly housing and connected to the outlet channel 3. The inlet 2 is located on the other side of the valve assembly housing and connected to the inlet channel 4. The purge channel 5 is installed on the valve assembly housing. A valve seat is also provided on the valve assembly housing. The valve assembly is mounted on the valve housing. The valve assembly includes a cylinder 7, a drive shaft, a valve plate 6, and a sealing structure. One end of the drive shaft is connected to the cylinder 7, and the other end is connected to the valve plate 6. The cylinder 7 drives the valve plate 6 to move up and down via the drive shaft to switch the gas in the chambers within the valve housing. The sealing structure includes a first sealing structure and a second sealing structure. The first sealing structure is located in the contact area between the valve plate 6 and the valve housing. The second sealing structure is installed outside the channel of the valve plate 6 and forms a secondary seal through gas pressurization. This RTO rotary valve achieves effective airflow switching through an outlet 1, an inlet 2, an outlet channel 3, an inlet channel 4, and a purge channel 5 located on the valve housing. During operation, the outlet 1 is connected to the outlet channel 3, the inlet 2 is connected to the inlet channel 4, and the purge channel 5 is used to remove residual gas. The valve housing is equipped with a valve seat and a valve assembly, which consists of a cylinder 7, a drive shaft, a valve plate 6, and a sealing structure. Cylinder 7 drives the transmission shaft, causing valve plate 6 to move up and down, thereby switching the airflow path within the chamber. The sealing structure consists of a first sealing structure and a second sealing structure. The first sealing structure is located in the contact area between valve plate 6 and the valve assembly housing, providing a basic seal. The second sealing structure is installed on the outside of the valve plate 6 channel, forming a secondary seal through gas pressurization to further prevent gas leakage. This structure ensures sealing performance and airflow switching stability under high temperature and high pressure environments, improving equipment operating efficiency and safety.

[0024] The first sealing structure includes a water ripple sealing surface 8 and a filler sealing surface 9; the filler sealing surface 9 is located at the edge of the valve plate 6 and contacts the water ripple sealing surface 8. The first sealing structure forms a basic sealing effect through the cooperation of the water ripple sealing surface 8 and the filler sealing surface 9. Since the filler sealing surface 9 is located at the edge of the valve plate 6 and contacts the water ripple sealing surface 8, when the valve plate 6 contacts the valve assembly housing, the water ripple sealing surface 8 improves the sealing performance by increasing the contact area, while the filler sealing surface 9 provides elastic compression, further enhancing the sealing effect. This design effectively prevents gas leakage and ensures the airtightness and safety of the equipment under gas switching and high-temperature, high-pressure operating environments.

[0025] The filling and sealing surface 9 is made of rubber or polytetrafluoroethylene (PTFE). The use of rubber or PTFE in the filling and sealing surface 9 leverages their excellent elasticity, high-temperature resistance, and corrosion resistance to provide a reliable seal when the valve plate 6 contacts the valve assembly housing. Rubber materials have good elasticity and deformation recovery capabilities, making them suitable for sealing in medium and low temperature environments; while PTFE possesses excellent high-temperature resistance and chemical stability, making it suitable for high-temperature, high-pressure, and corrosive gas environments. The application of these two materials improves the adaptability and sealing performance of the sealing surface, effectively preventing gas leakage and extending the service life of the equipment.

[0026] The second sealing structure consists of an air-sealing channel and air-sealing ports 10. The air-sealing channel is installed below or around the outer edge of the valve plate 6, forming an annular air-sealing channel or an embedded sealing cavity around the edge of the valve plate 6. The air-sealing channel is connected to multiple spaced-apart air-sealing ports 10, which face the contact area between the sealing surface and the valve assembly housing. When the equipment is running, gas is evenly ejected through the air-sealing ports 10, forming a multi-point distributed gas barrier along the edge of the valve plate 6, providing a secondary sealing effect. This design further improves the sealing performance, effectively prevents gas leakage, and maintains stable operation in high-temperature, high-pressure, or corrosive environments, ensuring the safety and reliability of the equipment. In use, gas is evenly ejected through multiple air-sealing ports 10, forming a stable gas barrier along the edge of the valve plate 6.

[0027] refer to Figure 4 As shown, a circular regenerative thermal oxidizer (RTO) includes a valve assembly housing and a combustion chamber. The valve assembly housing is installed at the lower part of the combustion chamber, forming an integral structure. A burner 11 is installed at the upper part of the combustion chamber to provide high-temperature combustion gases for the combustion of exhaust gases or fuels. This RTO is also equipped with a detection device installed at the upper part of the combustion chamber to monitor the temperature and pressure inside the combustion chamber in real time. The detection device consists of temperature and pressure sensors, and the temperature and pressure parameters are fed back to the control system through data acquisition from the temperature and pressure sensors. This design effectively ensures the safe operation of the equipment, prevents accidents caused by excessive temperature or abnormal pressure, and improves the stability and operating efficiency of the equipment.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circular lifting valve box, characterized in that, The valve assembly includes a valve housing, which is provided with an air outlet (1), an air inlet (2), an air outlet channel (3), an air inlet channel (4), and a purge channel (5). The air outlet (1) is located on one side of the valve housing and connected to the air outlet channel (3). The air inlet (2) is located on the other side of the valve housing and connected to the air inlet channel (4). The purge channel (5) is installed on the valve housing. The valve housing is also provided with a valve seat, on which a lifting valve assembly is provided. The lifting valve assembly includes a cylinder (7), a drive shaft, a valve plate (6), and a sealing structure. One end of the drive shaft is connected to the cylinder (7). 7) Connection: The other end of the drive shaft is connected to the valve plate (6). The cylinder (7) drives the valve plate (6) to move up and down through the drive shaft to switch the chamber gas in the valve assembly box. The sealing structure includes a first sealing structure and a second sealing structure. The first sealing structure is located in the contact area between the valve plate (6) and the valve assembly box. The second sealing structure is installed on the outside of the channel of the valve plate (6). It forms a secondary seal by pressurizing the gas. The first sealing structure includes a water ripple sealing surface (8) and a filling sealing surface (9). The filling sealing surface (9) is located at the edge of the valve plate (6) and contacts the water ripple sealing surface (8).

2. The circular lifting valve box according to claim 1, characterized in that, The filling sealing surface (9) is made of rubber or polytetrafluoroethylene.

3. The circular lifting valve box according to claim 2, characterized in that, The second sealing structure includes an air seal channel and an air seal port (10). The air seal channel is installed below or around the outer edge of the valve plate (6) and forms an annular air seal channel or an embedded sealing cavity.

4. A circular RTO, characterized in that, It includes the circular lift valve box and combustion chamber as described in any one of claims 1-3, wherein the valve assembly box is installed at the lower part of the combustion chamber.

5. The circular RTO according to claim 4, characterized in that, A burner (11) for supplying combustion gases is provided at the top of the combustion chamber.

6. The circular RTO according to claim 4, characterized in that, It also includes a detection device, which is installed in the upper part of the combustion chamber and includes a temperature sensor and a pressure sensor.

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