Corrosion-resistant venturi scrubber

Abstract

The utility model discloses a corrosion-resistant venturi scrubber, which comprises a contraction part, a throat pipe part and a diffusion part, and adopts a sectional structural design, the contraction part consists of a first contraction part and a second contraction part, and the first contraction part and the second contraction part are connected through a double-seal connecting flange to form an inverted circular truncated cone-shaped barrel. The throat pipe part is cylindrical, and the diffusion part is a circular truncated cone-shaped cylinder, so that gas-liquid full contact in the gas flow acceleration and deceleration processes is ensured. All the parts are connected through the double-sealing flange, double sealing of the metal sealing ring and the flexible sealing washer is used, and stable sealing in the high-temperature and high-pressure environment is guaranteed. In addition, a corrosion-resistant lining is arranged on the inner wall of the washer to prolong the service life of equipment, and a damping ring is arranged to reduce fluid vibration. The sealing performance, the gas-liquid contact efficiency and the corrosion resistance of the equipment are improved through optimization design, and the high-temperature and high-pressure gas purification device has higher working efficiency and stability and longer service life and is suitable for the field of high-temperature and high-pressure corrosive gas purification.

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically to a corrosion-resistant Venturi scrubber. Background Technology

[0002] Industries such as chemical engineering, metallurgy, and energy generate large amounts of gaseous pollutants. To effectively reduce these emissions, gas purification technology has gradually become a crucial technical means for treating various industrial emissions. Venturi scrubbers, due to their simple structure, high efficiency, and ability to handle large flow rates of gas, are widely used in the purification of various industrial waste gases.

[0003] Venturi scrubbers typically consist of a constriction section, a throat section, and a diffuser section. During this process, the fluid moves from a high-pressure region to a low-pressure region. Through fluid acceleration and enhanced turbulence, the gas and liquid are fully mixed and come into contact, undergoing reactions such as adsorption and scrubbing, thereby improving gas purification efficiency and achieving the purpose of purification.

[0004] When using a Venturi scrubber to treat fluidized bed exhaust gas containing HF during aluminum fluoride production, the following problems exist:

[0005] Corrosion issues: The shrinkage section of the Venturi scrubber is a single, long section. The PTFE lining is prone to bulging and damage in the high-temperature environment of the fluidized bed exhaust gas, making the inner wall of the equipment susceptible to corrosion. This results in a significantly shortened service life and high maintenance costs.

[0006] Sealing issues: Under high temperature and high pressure operating conditions, the sealing of connections in Venturi scrubbers is easily compromised, especially at flange connections, where leaks are prone to occur. This not only affects washing efficiency but may also cause environmental pollution or equipment damage.

[0007] Low gas-liquid mixing efficiency: Under certain special working conditions, the gas-liquid contact efficiency may be low, resulting in unsatisfactory gas purification effect.

[0008] The structure is not convenient for maintenance and replacement: The lining and flange connection structure of existing Venturi scrubbers are mostly single structures. Once the equipment is worn or corroded, the process of repairing and replacing parts is cumbersome, time-consuming and labor-intensive.

[0009] Therefore, a new Venturi scrubber design is needed to address the above issues, which can solve problems such as corrosion, sealing, gas-liquid mixing efficiency, and maintainability in existing technologies, thereby improving equipment stability, extending service life, and reducing operating and maintenance costs. Summary of the Invention

[0010] To solve the above-mentioned technical problems, this utility model provides a corrosion-resistant Venturi scrubber.

[0011] This utility model is achieved through the following technical solution:

[0012] This utility model discloses a corrosion-resistant Venturi scrubber, comprising a contraction section, a throat section, and a diffuser section. The contraction section includes a first contraction section and a second contraction section; the first and second contraction sections are fixedly connected by a double-sealed flange, together forming an inverted frustum-shaped cylinder; the throat section is cylindrical, and the smaller diameter end of the contraction section is coaxially fixedly connected to the throat section via the double-sealed flange; the diffuser section is also frustum-shaped, and its smaller diameter end is coaxially fixedly connected to the throat section via the double-sealed flange; the larger diameter end of the contraction section is the material inlet, and the larger diameter end of the diffuser section is the material outlet.

[0013] This Venturi scrubber features a segmented design, consisting of a contraction section, a throat section, and a diffuser section, with clearly defined overall shape and function. The contraction section comprises two parts, a first contraction section and a second contraction section, connected by flanges to form an inverted frustum-shaped cylinder. This design effectively accelerates the fluid, gradually reducing the pipe cross-sectional area within the contraction section, thereby increasing flow velocity and gas-material contact efficiency. Simultaneously, the contraction section, previously a single section, is divided into upper and lower parts, reducing its length and effectively preventing the PTFE lining from bulging and breaking due to high temperatures, thus extending the PTFE material's lifespan. The throat section, serving as a transition section, maintains a stable flow path and reduces energy loss. The frustum-shaped design of the diffuser effectively slows the fluid and guides thorough mixing of gas and material. Double-sealed flanges are used at all connections to ensure sealing and stability under high pressure and high temperature environments.

[0014] Furthermore, the double-sealed connection flange includes a first flange ring and a second flange ring fixedly connected to each other; the first flange ring and the second flange ring have the same shape; a metal sealing ring and a flexible sealing gasket are coaxially arranged between the first flange ring and the second flange ring; the diameter of the metal sealing ring is smaller than the diameter of the flexible sealing gasket; the flexible sealing gasket has its radial position fixed by two annular baffles respectively arranged on the first flange ring and the second flange ring.

[0015] The double-sealed flange design ensures the sealing performance of the equipment in high-temperature, high-pressure, and corrosive environments. The combination of a metal sealing ring and a flexible sealing gasket provides dual sealing protection. The metal sealing ring can withstand high temperatures and pressures, while the flexible sealing gasket offers better elasticity and adaptability. This combination ensures the long-term stability of the connection, preventing leakage caused by temperature changes or pressure fluctuations. The annular retaining strip effectively fixes the position of the sealing gasket, preventing displacement due to changes in fluid pressure, thus guaranteeing the durability of the seal.

[0016] Furthermore, the inner walls of the contraction section, throat section, and diffuser section are respectively provided with corrosion-resistant liners. The liner design ensures that the Venturi scrubber is not affected by corrosive fluids during long-term operation, extending the equipment's service life. The corrosion-resistant liner effectively prevents the erosion of the equipment's inner walls by corrosive substances such as strong acids and alkalis, ensuring structural stability. The liner material can be selected according to operating conditions; for example, materials with excellent corrosion resistance, such as polytetrafluoroethylene (PTFE), not only improve the equipment's durability but also reduce maintenance frequency and replacement costs.

[0017] Furthermore, two shock-absorbing rings are fixedly connected to the inner wall of the throat section; the shock-absorbing rings are circular, with their outer diameter being the same as the inner diameter of the throat section, and their inner ring surfaces being streamlined; the two shock-absorbing rings are respectively located at both ends of the throat section.

[0018] The damping ring is designed to reduce vibration and noise caused by fluid flow during equipment operation. Its streamlined inner ring surface design helps reduce fluid flow resistance and avoids turbulence. Furthermore, the outer diameter of the damping ring perfectly matches the inner diameter of the throat, ensuring maximum damping effect. This design not only improves equipment stability and operational comfort but also reduces mechanical wear and extends equipment lifespan.

[0019] Furthermore, the metal sealing ring is a metal O-ring made of a high-temperature resistant and corrosion-resistant alloy material. As a sealing element, the material selection of the metal sealing ring is crucial. In this design, high-temperature resistant and corrosion-resistant alloy materials, such as stainless steel, titanium alloy, or other special alloys, are selected to ensure that the sealing ring does not deform or become damaged in high-temperature, high-pressure, and corrosive environments. The metal O-ring possesses strong pressure resistance and sealing performance, effectively preventing leakage and ensuring the safe operation of the entire washer.

[0020] Furthermore, the flexible sealing gasket is an elastic sealing ring made of high-temperature and corrosion-resistant materials. The main function of the flexible sealing gasket is to provide an elastic seal, adapting to changes under different working conditions. High-temperature and corrosion-resistant elastic sealing rings have good adaptability and can maintain a good sealing effect when temperature and pressure change. These elastic sealing rings typically use materials such as PTFE and silicone, which can effectively prevent sealing failure caused by thermal expansion or contraction, ensuring long-term stable sealing performance.

[0021] Furthermore, the first and second flange rings are fixedly connected by a number of fastening bolts or by a snap-locking device. This connection method is designed with the maintenance and disassembly needs of the equipment fully in mind. The fastening bolts provide a robust connection, suitable for harsh operating conditions such as high pressure and high temperature, ensuring the stability of the flange connection. The snap-locking device, on the other hand, facilitates quick installation and disassembly, suitable for situations requiring frequent maintenance and component replacement. Whether bolted or snap-locked, both methods effectively guarantee the sealing and connection strength at the flange, providing reliable performance.

[0022] Furthermore, the corrosion-resistant lining is provided in multiple pieces, which are respectively disposed on the inner walls of the contraction section, the throat section and the diffusion section; the corrosion-resistant lining is fixedly connected by bolts or by adhesive.

[0023] The multi-piece corrosion-resistant liner design allows for flexible adaptation to different parts and shapes of the equipment's inner wall. Covering the inner wall with multiple pieces not only enhances corrosion resistance but also facilitates individual replacement of damaged components. The liner can be secured using bolts, adhesive bonding, or other methods; the most suitable connection method can be selected based on specific circumstances to ensure the liner's stability and durability.

[0024] Furthermore, the snap-locking device includes multiple annular snaps, each snap being fixedly connected to the corresponding position of the first flange ring and the second flange ring by fixing bolts. An elastic sealing gasket is provided inside the snap, and a certain pre-tightening force is applied during installation to ensure the sealing of the flange connection.

[0025] The snap-locking device connects the first and second flange rings via multiple ring-shaped snaps, providing quick installation and disassembly. Each snap contains a resilient sealing gasket, which applies a certain preload during connection to ensure a tight seal. The resilient sealing gasket can adapt to different pressure fluctuations, ensuring that the sealing effect is unaffected by environmental changes.

[0026] Furthermore, a sealing monitoring device is provided on the double-sealed connecting flange at the connection between the throat section and the diffuser section; the sealing monitoring device includes a pressure sensor and a sensor corresponding to the washing gas.

[0027] The sealing monitoring device can monitor the sealing status of the connections in real time. Pressure sensors detect pressure changes at the flange connections, promptly identifying seal failures caused by factors such as temperature and pressure. Washing gas sensors monitor for gas leaks, ensuring no gas leaks during the washing process. This monitoring system allows for timely detection of sealing problems and the implementation of corrective measures, preventing accidental leaks or malfunctions during washer operation.

[0028] The sealing monitoring device is a crucial component of the Venturi scrubber design. Its primary function is to monitor the sealing status of the flange connections in real time, ensuring reliable sealing performance even under high temperature, high pressure, and corrosive environments. This device comprises multiple sensors and associated hardware, which, through precise connection and coordination, acquire real-time sealing data and feed it back to the operating system.

[0029] The core components of the sealing monitoring device are a pressure sensor and a gas leak sensor. The pressure sensor is installed within the sealing loop of the flange connection to monitor pressure changes at the seal in real time. When the sealing performance at the connection deteriorates or fails, the pressure changes typically become unstable; the pressure sensor can promptly detect this change and transmit the data to the control system. The gas leak sensor, working in conjunction with the pressure sensor, is installed outside the sealing area and is primarily used to detect whether washing gas is leaking from the flange connection. If the washing gas leakage exceeds a predetermined value, the gas sensor will immediately issue an alarm, indicating a potential sealing problem.

[0030] These two sensors are connected to a data acquisition system via wiring. The data acquisition system is responsible for processing and analyzing the information collected by the sensors, ultimately determining whether the seal needs maintenance or replacement. Furthermore, the wireless or wired communication method between the sensors and the control system can be configured according to actual needs, ensuring accurate information transmission and real-time feedback.

[0031] In practical applications, the seal monitoring device, through precise data monitoring from pressure sensors and real-time feedback from gas leak sensors, can promptly detect early signs of seal failure, preventing gas leaks, equipment damage, or environmental pollution caused by sealing problems. The seal monitoring device operates on a very simple yet efficient basis: when the seal performance remains constant, pressure and gas concentration are maintained within normal ranges; once a leak or abnormal pressure occurs, the sensors quickly send signals to the operator, indicating a potential malfunction and thus preventing equipment downtime or malfunction. In this way, the seal monitoring device not only improves the safety of equipment operation but also extends the service life of the Venturi scrubber and reduces maintenance costs.

[0032] The beneficial effects of this utility model are as follows:

[0033] To improve corrosion resistance, the shrinkage section is divided into two parts, the first shrinkage section and the second shrinkage section, which reduces the length and effectively prevents high temperature damage to the PTFE lining material, reduces bulging and breakage, extends the service life of PTFE materials and equipment, and reduces maintenance costs.

[0034] Enhanced sealing performance: The double-sealed flange design uses a combination of metal sealing rings and flexible sealing gaskets to ensure long-term stable sealing under high temperature, high pressure and corrosive environments, avoiding leakage problems.

[0035] The segmented structural design optimizes the airflow path, accelerates fluid velocity, and increases gas-liquid contact, thereby significantly improving gas purification efficiency and gas-liquid contact efficiency.

[0036] Vibration damping design improves stability, while vibration damping ring design reduces vibration and noise, reduces mechanical wear, and enhances equipment stability and operational comfort.

[0037] Easy to maintain and disassemble, the snap-lock device and bolt fixing method make installation, disassembly and maintenance more convenient and quick, reducing downtime.

[0038] The sealing monitoring device ensures safe operation. It monitors the sealing status in real time, detects sealing problems in a timely manner, and ensures the safe and efficient operation of the equipment. Attached Figure Description

[0039] Figure 1 : A three-dimensional structural schematic diagram of this utility model;

[0040] Figure 2 : Front view of this utility model;

[0041] Figure 3 : A three-dimensional structural cross-sectional view of this utility model;

[0042] Figure 4 : Exploded three-dimensional view of the double-sealed connecting flange of this utility model;

[0043] Figure 5 : A schematic diagram of the installation state of the flexible sealing gasket of this utility model;

[0044] Figure 6 : A three-dimensional sectional view of the throat section and the double-sealed connecting flange of this utility model;

[0045] In the figure: 1-Contraction section, 2-Throat section, 3-Diffusion section, 4-Double sealing flange, 5-Corrosion resistant lining, 6-Shock-absorbing ring, 11-First contraction section, 12-Second contraction section, 41-First flange ring, 42-Second flange ring, 43-Metal sealing ring, 44-Flexible sealing gasket. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0047] Example: Figure 1-6As shown, a corrosion-resistant Venturi scrubber includes a contraction section 1, a throat section 2, and a diffuser section 3. The contraction section 1 comprises a first contraction section 11 and a second contraction section 12; the first contraction section 11 and the second contraction section 12 are fixedly connected by a double-sealed connecting flange 4, together forming an inverted frustum-shaped cylinder; the throat section 2 is cylindrical, and the smaller diameter end of the contraction section 1 is coaxially fixedly connected to the throat section 2 by the double-sealed connecting flange 4; the diffuser section 3 is a frustum-shaped cylinder, and its smaller diameter end is coaxially fixedly connected to the throat section 2 by the double-sealed connecting flange 4; the larger diameter end of the contraction section 1 is the material inlet, and the larger diameter end of the diffuser section 3 is the material outlet.

[0048] This Venturi scrubber employs a segmented structural design, consisting of a contraction section 1, a throat section 2, and a diffuser section 3, with clearly defined overall shape and function. The contraction section 1 comprises two parts: a first contraction section 11 and a second contraction section 12, connected by flanges to form an inverted frustum-shaped cylinder. This design effectively accelerates the fluid, gradually reducing the pipe cross-sectional area within the contraction section, thereby increasing flow velocity and gas-material contact efficiency. The throat section 2 serves as a transition section, maintaining a stable flow path and reducing energy loss. The frustum-shaped design of the diffuser section 3 effectively slows down the fluid and guides thorough mixing of gas and material. Double-sealed flanges 4 are used at the connections of each part to ensure sealing and stability under high pressure and high temperature environments.

[0049] Furthermore, the double-sealed connecting flange 4 includes a first flange ring 41 and a second flange ring 42 that are fixedly connected to each other; the first flange ring 41 and the second flange ring 42 have the same shape; a metal sealing ring 43 and a flexible sealing gasket 44 are coaxially arranged between the first flange ring 41 and the second flange ring 42; the diameter of the metal sealing ring 43 is smaller than the diameter of the flexible sealing gasket 44; the flexible sealing gasket 44 is fixed in radial position by two annular baffles respectively provided on the first flange ring 41 and the second flange ring 42.

[0050] The double-sealed flange 4 is designed to ensure the sealing performance of the equipment in high-temperature, high-pressure, and corrosive environments. The combination of a metal sealing ring 43 and a flexible sealing gasket 44 provides double sealing protection. The metal sealing ring 43 can withstand high temperatures and pressures, while the flexible sealing gasket 44 provides better elasticity and adaptability. This combination ensures the long-term stability of the connection, preventing leakage caused by temperature changes or pressure fluctuations. The annular retaining strip effectively fixes the position of the sealing gasket, preventing displacement due to changes in fluid pressure, thus ensuring the durability of the seal.

[0051] Furthermore, corrosion-resistant liners 5 are respectively provided on the inner walls of the contraction section 1, the throat section 2, and the diffuser section 3. The liners are designed to ensure that the Venturi scrubber is not affected by corrosive fluids during long-term operation, extending the equipment's service life. The corrosion-resistant liners 5 effectively prevent the erosion of the equipment's inner walls by corrosive substances such as strong acids and alkalis, ensuring structural stability. The material of the liners can be selected according to the operating conditions; for example, materials with excellent corrosion resistance, such as polytetrafluoroethylene (PTFE), not only improve the equipment's durability but also reduce maintenance frequency and replacement costs.

[0052] Furthermore, two shock-absorbing rings 6 are fixedly connected to the inner wall of the throat section 2; the shock-absorbing rings 6 are circular, with their outer diameter being the same as the inner diameter of the throat section 2, and their inner ring surface being streamlined; the two shock-absorbing rings 6 are respectively located at both ends of the throat section 2.

[0053] The damping ring 6 is designed to reduce vibration and noise caused by fluid flow during equipment operation. Its streamlined inner ring surface design helps reduce fluid flow resistance and avoids turbulence. Furthermore, the outer diameter of the damping ring 6 perfectly matches the inner diameter of the throat section 2, ensuring maximum damping effect. This design not only improves equipment stability and operational comfort but also reduces mechanical wear and extends equipment lifespan.

[0054] Furthermore, the metal sealing ring 43 is a metal O-ring made of a high-temperature resistant and corrosion-resistant alloy material. As a sealing element, the material selection of the metal sealing ring 43 is crucial. In this design, a high-temperature resistant and corrosion-resistant alloy material, such as stainless steel, titanium alloy, or other special alloys, is selected to ensure that the sealing ring does not deform or become damaged in high-temperature, high-pressure, and corrosive environments. The metal O-ring possesses strong pressure resistance and sealing performance, effectively preventing leakage and ensuring the safe operation of the entire washer.

[0055] Furthermore, the flexible sealing gasket 44 is an elastic sealing ring made of high-temperature and corrosion-resistant materials. The main function of the flexible sealing gasket 44 is to provide an elastic seal, adapting to changes under different working conditions. High-temperature and corrosion-resistant elastic sealing rings have good adaptability and can maintain a good sealing effect when temperature and pressure change. These elastic sealing rings typically use materials such as PTFE and silicone, which can effectively prevent sealing failure caused by thermal expansion or contraction, ensuring long-term stable sealing performance.

[0056] Furthermore, the first flange ring 41 and the second flange ring 42 are fixedly connected by a number of fastening bolts or by a snap-locking device. This connection method is designed to fully consider the maintenance and disassembly requirements of the equipment. The fastening bolts provide a robust connection, suitable for harsh operating conditions such as high pressure and high temperature, ensuring the stability of the flange connection. The snap-locking device facilitates quick installation and disassembly, suitable for situations requiring frequent maintenance and component replacement. Whether bolted or snap-locked, both methods effectively guarantee the sealing and connection strength at the flange, providing reliable performance.

[0057] Furthermore, the corrosion-resistant liner 5 is provided in multiple pieces, which are respectively disposed on the inner walls of the contraction section 1, the throat section 2 and the diffusion section 3; the corrosion-resistant liner 5 is fixedly connected by bolts or by adhesive.

[0058] The multi-piece corrosion-resistant liner design allows for flexible adaptation to different parts and shapes of the equipment's inner wall. Covering the inner wall with multiple pieces not only enhances corrosion resistance but also facilitates individual replacement of damaged components. The liner can be secured using bolts, adhesive bonding, or other methods, allowing for selection of the most suitable connection method based on specific circumstances to ensure the liner's stability and durability.

[0059] Furthermore, the snap-locking device includes multiple annular snaps, each snap being fixedly connected to the corresponding position of the first flange ring 41 and the second flange ring 42 by fixing bolts. The snaps are provided with elastic sealing gaskets, and a certain pre-tightening force is applied during installation to ensure the sealing of the flange connection.

[0060] The snap-fit ​​locking device connects the first flange ring 41 and the second flange ring 42 via multiple ring snaps, providing quick installation and disassembly. Each snap is equipped with a resilient sealing gasket, which applies a certain preload during connection to ensure a tight seal. The resilient sealing gasket can adapt to different pressure fluctuations, ensuring that the sealing effect is not affected by environmental changes.

[0061] Furthermore, a sealing monitoring device is provided on the double-sealed connecting flange 4 at the connection between the throat section 2 and the diffuser section 3; the sealing monitoring device includes a pressure sensor and a sensor corresponding to the washing gas.

[0062] The sealing monitoring device can monitor the sealing status of the connections in real time. Pressure sensors detect pressure changes at the flange connections, promptly identifying seal failures caused by factors such as temperature and pressure. Washing gas sensors monitor for gas leaks, ensuring no gas leaks during the washing process. This monitoring system allows for timely detection of sealing problems and the implementation of corrective measures, preventing accidental leaks or malfunctions during washer operation.

[0063] The sealing monitoring device is a crucial component of the Venturi scrubber design. Its primary function is to monitor the sealing status of the flange connections in real time, ensuring reliable sealing performance even under high temperature, high pressure, and corrosive environments. This device comprises multiple sensors and associated hardware, which, through precise connection and coordination, acquire real-time sealing data and feed it back to the operating system.

[0064] The core components of the sealing monitoring device are a pressure sensor and a gas leak sensor. The pressure sensor is installed within the sealing loop of the flange connection to monitor pressure changes at the seal in real time. When the sealing performance at the connection deteriorates or fails, the pressure changes typically become unstable; the pressure sensor can promptly detect this change and transmit the data to the control system. The gas leak sensor, working in conjunction with the pressure sensor, is installed outside the sealing area and is primarily used to detect whether washing gas is leaking from the flange connection. If the washing gas leakage exceeds a predetermined value, the gas sensor will immediately issue an alarm, indicating a potential sealing problem.

[0065] These two sensors are connected to a data acquisition system via wiring. The data acquisition system is responsible for processing and analyzing the information collected by the sensors, ultimately determining whether the seal needs maintenance or replacement. Furthermore, the wireless or wired communication method between the sensors and the control system can be configured according to actual needs, ensuring accurate information transmission and real-time feedback.

[0066] In practical applications, the seal monitoring device, through precise data monitoring from pressure sensors and real-time feedback from gas leak sensors, can promptly detect early signs of seal failure, preventing gas leaks, equipment damage, or environmental pollution caused by sealing problems. The seal monitoring device operates on a very simple yet efficient basis: when the seal performance remains constant, pressure and gas concentration are maintained within normal ranges; once a leak or abnormal pressure occurs, the sensors quickly send signals to the operator, indicating a potential malfunction and thus preventing equipment downtime or malfunction. In this way, the seal monitoring device not only improves the safety of equipment operation but also extends the service life of the Venturi scrubber and reduces maintenance costs.

[0067] In summary, this embodiment provides a corrosion-resistant Venturi scrubber with a segmented structure, including a constriction section 1, a throat section 2, and a diffuser section 3. It is primarily used for gas scrubbing operations under high temperature and high pressure environments. The scrubber's inner wall is lined with a corrosion-resistant material, and double-sealed flanges ensure airtightness, thereby extending the equipment's service life and improving its stability.

[0068] Structure and Working Principle: The main components of the Venturi scrubber include a contraction section 1, a throat section 2, and a diffuser section 3. The contraction section 1 consists of a first contraction section 11 and a second contraction section 12, which are fixedly connected by a double-sealed connecting flange 4 to form an inverted frustum-shaped cylinder. The larger end of the contraction section 1 is the material inlet, through which gas and liquid enter the equipment. After being gradually accelerated by the contraction section, the flow rate increases significantly and further enters the throat section 2.

[0069] The throat section 2 is cylindrical, and its function is to maintain the stability of fluid flow and reduce energy loss. The contraction section 1 is connected to the smaller end of the throat section 2 through the double-sealed connecting flange 4, ensuring a smooth transition between airflow and liquid flow.

[0070] The diffuser section 3 is a frustum-shaped cylinder connected to the other end of the throat section 2. The fluid slows down and gradually diffuses in this section, which helps to ensure sufficient contact between the gas and the liquid. The larger end of the diffuser section 3 is the material outlet, through which the gas and material are discharged from the equipment.

[0071] The design of the double-sealed connecting flange: At each connection point, the contraction section 1, the throat section 2, and the diffuser section 3 are connected by a double-sealed connecting flange 4. Specifically, the double-sealed connecting flange 4 includes a first flange ring 41 and a second flange ring 42, which are fixedly connected by several fastening bolts or snap-locking devices. A metal sealing ring 43 and a flexible sealing gasket 44 are coaxially arranged between the flanges to ensure sealing performance. The metal sealing ring 43 is made of a high-temperature and corrosion-resistant alloy material, such as stainless steel or titanium alloy, capable of withstanding the challenges of high-temperature and high-pressure environments. The flexible sealing gasket 44 is made of a material with good elasticity, such as PTFE, capable of adapting to temperature changes and pressure fluctuations.

[0072] In addition, the flange connection is equipped with a sealing monitoring device, including a pressure sensor and a gas leak sensor, to monitor the sealing status in real time. By monitoring pressure changes and gas leaks, the risk of seal failure can be detected in a timely manner, ensuring the safe operation of the equipment.

[0073] Lining Design and Shock Absorbing Rings: To further improve the corrosion resistance of the equipment, corrosion-resistant liners 5 are installed on the inner walls of the constriction section 1, throat section 2, and diffuser section 3 of the Venturi scrubber. The lining material is polytetrafluoroethylene (PTFE), which has excellent corrosion resistance and can prevent strong acids, strong alkalis, and other corrosive substances from eroding the inner walls of the equipment, extending its service life. The segmented design of the lining can flexibly meet the needs of different shapes and parts, and can be replaced as needed.

[0074] In addition, in order to reduce the vibration and noise caused by the fluid during equipment operation, two damping rings 6 are fixedly connected to the inner wall of the throat section 2. The outer diameter of the damping rings is the same as the inner diameter of the throat section 2, and the inner ring surface is streamlined to effectively reduce the resistance of fluid flow and avoid turbulence, thereby improving the stability and operating comfort of the equipment.

[0075] Implementation Process: During operation, after entering the Venturi scrubber, the gas and liquid first enter the contraction section 1, where the fluid velocity gradually increases through a two-stage acceleration design. As the air and liquid flow through the throat section 2, the flow channel remains stable, reducing energy loss. Finally, the fluid enters the diffuser section 3, where the gas and liquid are thoroughly mixed under the diffusion effect, completing the washing process. The treated gas and liquid are discharged from the equipment's material outlet, achieving the predetermined purification effect.

[0076] During equipment operation, the sealing monitoring device ensures the reliable sealing of all connections through real-time monitoring by pressure sensors and gas leakage sensors. If the pressure at the seal is abnormal or the gas leakage exceeds the limit, the sensors will automatically issue an alarm, reminding operators to take timely maintenance measures.

[0077] Scope of application: The corrosion-resistant Venturi scrubber in this embodiment is widely applicable to the washing and purification processes of high-temperature, high-pressure and corrosive fluids. It is particularly suitable for gas purification systems in chemical, metallurgical, and environmental protection fields, and can effectively improve washing efficiency, extend equipment service life, and reduce equipment maintenance costs.

[0078] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrosion resistant venturi scrubber comprising a converging section (1), a throat section (2) and a diverging section (3), characterised in that: The contraction section (1) includes a first contraction section (11) and a second contraction section (12); the first contraction section (11) and the second contraction section (12) are fixedly connected by a double-sealed connecting flange (4), and together they form an inverted frustum-shaped cylinder; the throat section (2) is cylindrical, and the smaller diameter end of the contraction section (1) is coaxially fixedly connected to the throat section (2) by the double-sealed connecting flange (4); the diffuser section (3) is a frustum-shaped cylinder, and the smaller diameter end of it is coaxially fixedly connected to the throat section (2) by the double-sealed connecting flange (4); the larger diameter end of the contraction section (1) is the material inlet, and the larger diameter end of the diffuser section (3) is the material outlet.

2. A corrosion resistant venturi scrubber as claimed in claim 1 wherein: The double-sealed connecting flange (4) includes a first flange ring (41) and a second flange ring (42) that are fixedly connected to each other; the first flange ring (41) and the second flange ring (42) have the same shape; a metal sealing ring (43) and a flexible sealing gasket (44) are coaxially arranged between the first flange ring (41) and the second flange ring (42); the diameter of the metal sealing ring (43) is smaller than the diameter of the flexible sealing gasket (44); the flexible sealing gasket (44) is fixed in radial position by two annular baffles respectively arranged on the first flange ring (41) and the second flange ring (42).

3. A corrosion resistant venturi scrubber as claimed in claim 1 or 2 wherein: The inner walls of the contraction section (1), the throat section (2) and the diffusion section (3) are respectively provided with corrosion-resistant linings (5).

4. A corrosion resistant venturi scrubber as claimed in claim 1 or 2 wherein: Two shock-absorbing rings (6) are fixedly connected to the inner wall of the throat section (2); the shock-absorbing rings (6) are circular, and their outer diameter is the same as the inner diameter of the throat section (2), and their inner ring surface is streamlined; the two shock-absorbing rings (6) are located at both ends of the throat section (2).

5. A corrosion-resistant Venturi scrubber as described in claim 2, characterized in that: The metal sealing ring (43) is a metal O-ring made of high-temperature resistant and corrosion-resistant alloy material.

6. A corrosion resistant venturi scrubber as defined in claim 2 wherein: The flexible sealing gasket (44) is an elastic sealing ring made of high temperature and corrosion resistant materials.

7. A corrosion resistant venturi scrubber as defined in claim 2 wherein: The first flange ring (41) and the second flange ring (42) are fixedly connected by a number of fastening bolts or by a snap-locking device.

8. A corrosion resistant venturi scrubber as defined in claim 3 wherein: The corrosion-resistant liner (5) is configured as multiple pieces, which are respectively disposed on the inner walls of the contraction section (1), the throat section (2) and the diffusion section (3); the corrosion-resistant liner (5) is fixedly connected by bolts or by adhesive.

9. A corrosion resistant venturi scrubber as defined in claim 7 wherein: The snap-locking device includes multiple annular snaps. Each snap is fixedly connected to the corresponding position of the first flange ring (41) and the second flange ring (42) by fixing bolts. An elastic sealing gasket is provided inside the snap. During installation, a certain pre-tightening force is applied to ensure the sealing of the flange connection.

10. A corrosion resistant venturi scrubber as claimed in any one of claims 5 to 9 wherein: A sealing monitoring device is provided on the double-sealed connecting flange (4) at the connection between the throat section (2) and the diffuser section (3); the sealing monitoring device includes a pressure sensor and a sensor corresponding to the washing gas.

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