Disc centrifuge, system and method

Abstract

The invention belongs to the technical field of centrifugal machine sterilization, and particularly relates to a disc type centrifugal machine, system and method.The centrifugal machine comprises a vertical shaft, a mechanical seal cover, a mechanical seal, a water inlet and outlet seat and a steam channel, the vertical shaft is installed in the mechanical seal cover, the vertical shaft is sleeved with the mechanical seal, the mechanical seal is sleeved with the water inlet and outlet seat, and the steam channel is communicated with the vertical shaft. The steam channel penetrates through the mechanical seal and the water inlet and outlet seat from one side of the mechanical seal cover and is cut off from the other side of the mechanical seal cover. The steam channels are formed in the mechanical seal cover, the mechanical seal and the water inlet and outlet seat, so that high-temperature steam is used for sterilizing the mechanical seal part of the disc centrifuge, the situation that mechanical seal water is conducted to materials due to microbial contamination can be effectively avoided, and the purity of the materials in the treatment process is guaranteed; the device is especially suitable for the fields with high hygiene requirements such as biopharmacy and food processing.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifuge sterilization, and in particular relates to a disc centrifuge, a system and a method. Background Art

[0002] As the core equipment in the liquid-solid separation process, disc centrifuge plays an indispensable role in industries such as biopharmaceuticals, food processing and beverage production, which have extremely high requirements for product purity and safety. Therefore, the centrifuge not only needs to have efficient separation capabilities, but also needs to meet strict hygiene standards and sterilization requirements. When facing high temperature, high pressure or chemical sterilization, traditional disc centrifuges often encounter problems such as inconvenient operation, accelerated equipment wear and incomplete sterilization effect. These problems seriously affect the sanitary conditions and service life of the equipment. The traditional mechanical seal design is difficult to withstand the high-temperature steam sterilization environment. After long-term use, it is easy to age and damage, resulting in seal failure and leakage risks, affecting the sterilization effect. During the high-speed operation of the rotor assembly, material residue and friction will cause surface wear, reduce equipment performance, and it is not easy to be thoroughly cleaned and sterilized, increasing the risk of cross contamination, especially when handling perishable and high-risk materials. This becomes a key issue. Although there are some solutions to the above problems on the market, they often fail to integrate an efficient and comprehensive sterilization solution in the mechanical seal, rotor and slag discharge part, making the equipment still a source of contamination in actual use. The Chinese patent with the announcement number CN208727766U discloses a disc centrifuge aseptic pressure-maintaining system, which belongs to the technical field of sterilization equipment, and includes a connecting pipeline with steam, which sequentially connects a filter device and a pressure-maintaining device connected to the disc centrifuge, and a first pneumatic diaphragm valve is arranged on the connecting pipeline between the filter device and the pressure-maintaining device, and a monitoring device for monitoring the temperature of the steam in the pressure-maintaining device and controlling the on-off of the first pneumatic diaphragm valve is arranged on the pressure-maintaining device. The above device is cumbersome to operate, and the steam pressure is ensured by an external pressure-maintaining device, and the sterilization effect of the device at the mechanical seal is poor. Therefore, it is urgent for those skilled in the art to solve the above technical problems. Summary of the invention

[0003] The technical problem to be solved by the present invention is that in the above-mentioned prior art, an efficient sterilization solution is not integrated in the mechanical sealing device, which makes the equipment easily become a source of contamination during use.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A disc centrifuge comprises a vertical shaft, a machine cover, a mechanical seal, an inlet and outlet water seat and a steam channel, wherein the vertical shaft is installed in the machine cover, the mechanical seal is sleeved on the vertical shaft, the inlet and outlet water seat is sleeved on the mechanical seal, the steam channel starts from one side of the machine cover, passes through the mechanical seal and the inlet and outlet water seat respectively, and is terminated from the other side of the machine cover, and the steam channel is connected to an external steam generating device.

[0005] By adopting the above technical solution, steam channels are set on the machine cover, mechanical seal and water inlet and outlet seats, so that high-temperature steam can directly pass through these key components. This not only ensures the thorough sterilization of the inside of the centrifuge, but also effectively avoids microbial contamination and ensures the purity of the materials during the processing. The use of mechanical seals can provide better sealing effects, especially in the face of high-temperature steam environments. This design reduces the aging and damage problems common in traditional sealing methods, reduces the risk of seal failure, and improves the safety and reliability of the equipment. Since steam can flow directly through the inlet and outlet water seats and other components, it helps to remove possible residual materials, reduces the chance of cross contamination, and makes cleaning easier and more thorough. This is especially important for products that require frequent cleaning or batch changes. Better sealing and effective sterilization measures reduce equipment damage caused by corrosion or wear, thereby extending the service life of the machine and reducing long-term operating costs.

[0006] Further, the mechanical seal includes an upper static ring, a dynamic ring, a dynamic ring pressure cover and a lower static ring, the dynamic ring is located between the upper static ring and the lower static ring, the dynamic ring is clamped on the dynamic ring pressure cover, a compression spring is provided at the top of the upper static ring and the bottom of the lower static ring, the compression spring abuts against the inner side of the mechanical seal cover; an inlet and outlet water seat pressure cover is provided above the inlet and outlet water seat, and the mechanical seal cover is provided on the top of the inlet and outlet water seat pressure cover.

[0007] By adopting the above technical solution, the presence of the compression spring ensures that the dynamic ring maintains close contact between the upper and lower static rings. Even if there is a slight vibration or deviation during the operation of the equipment, the pressure of the spring can ensure the continuous fit of the sealing interface, thereby greatly reducing the possibility of leakage. The dynamic ring is fixed to the dynamic ring gland by a snap-on method, which not only simplifies the assembly process, but also improves the stability of the dynamic ring position, further enhancing the sealing effect. Due to the use of mechanical seals, the friction between the two sealing surfaces is small, which helps to reduce wear and extend the service life of the seal. The design of the compression spring can adapt to the thermal expansion and contraction caused by temperature changes, so that the seal can maintain good sealing performance under different temperature conditions. This sealing structure has a high degree of modularity. Each component (such as the dynamic ring and the static ring) can be disassembled and replaced independently without replacing the entire sealing system as a whole, reducing maintenance costs and time. When deep cleaning or sterilization is required, the relevant components can be easily disassembled to ensure that every corner can be thoroughly cleaned, avoiding the risk of microbial residue. Adding a gland above the inlet and outlet water seats can not only provide additional support and protection, but also provide more flexibility for the design of the steam channel. Steam can enter from one side of the mechanical seal cover and be discharged from the other side after passing through various layers of seals, forming a complete circulation path to ensure that all key parts can be effectively sterilized. The mechanical seal can maintain stable operation under high pressure, which is essential for sterilization using high temperature and high pressure steam. It can prevent steam leakage and protect the internal materials from external contamination.

[0008] Further, the steam channel includes a starting section, a transition section 1, an annular channel, a constant pressure section, a transition section 2 and a terminating section. The starting section and the terminating section are arranged at both ends of the inlet and outlet water seats along the horizontal direction. The starting section extends obliquely upward in the inlet and outlet water seats to form an inclined section. The inclined section is connected with the inlet and outlet water seat pressure cover to form the transition section 1. The transition section 1 passes through the inlet and outlet water seat pressure cover along the horizontal direction and is connected with the annular channel. The outer side of the lower static ring is provided with the boost end connected with the annular channel. The boost end is connected to the transition section 2. The transition section 2 passes through the machine seal cover, the inlet and outlet water seat pressure cover, the inlet and outlet water seat and is connected with the terminating section along the vertical direction.

[0009] By adopting the above technical solution, the starting section extends upward in the water inlet and outlet seat to form an inclined section, which helps to guide the steam to smoothly enter the subsequent channel section. This design can reduce the steam flow resistance and ensure that the steam can be quickly and evenly distributed throughout the system. From the starting section in the horizontal direction to the transition section 2 in the vertical direction, the steam can flow freely in different dimensions, covering more internal surfaces and improving the sterilization effect. The design of the annular channel enables the steam to form a relatively uniform pressure environment in this area, and the constant pressure section further ensures the stability of the pressure during the entire sterilization process. This not only helps to improve the sterilization efficiency, but also protects the equipment from the impact of high pressure shock. The boost end set on the outside of the lower static ring is connected to the annular channel, and the steam is introduced into the terminal section through the transition section 2. The pressure adjustment in this process can help maintain the required high temperature conditions, ensure the consistency and continuity of the sterilization temperature, and gradually guide the steam through multiple stages (such as transition section 1, annular channel, transition section 2) to avoid the leakage risk that may be caused by a single path. Each connection point is carefully designed to ensure tightness, thereby improving the overall safety of the system. The clear division between sections makes it easier for maintenance personnel to identify problems and conduct targeted maintenance or cleaning. At the same time, such a layout also facilitates the thorough removal of residues and reduces the possibility of cross contamination.

[0010] Furthermore, a transmission bolt is also provided on the vertical shaft, and the transmission bolt is sleeved on the vertical shaft. The transmission bolt is connected to the moving ring, and the moving ring is installed on the moving ring seat. The moving ring seat is also provided with the moving ring pressure cover, and the moving ring pressure cover is also provided with a fixing bolt, and the moving ring pressure cover is fixed in the machine seal cover by the fixing bolt.

[0011] By adopting the above technical solution, the transmission bolt is directly mounted on the vertical shaft and connected to the dynamic ring, ensuring the directness and reliability of power transmission. This design reduces the intermediate links and reduces the possibility of failure. The dynamic ring seat and the dynamic ring gland are firmly fixed in the machine seal cover by fixing bolts, which enhances the stability of the entire sealing system and can maintain a good working condition even under high-speed rotation. Since the dynamic ring is firmly installed on the dynamic ring seat, and the dynamic ring seat is fastened in the machine seal cover by the dynamic ring gland, this ensures close contact between the dynamic ring and the static ring, thereby improving the sealing effect and preventing leakage. The solid connection method can effectively resist the vibration caused by the operation of the equipment, reduce the wear of the sealing surface, and extend the service life of the seal. Each component (such as transmission bolts, dynamic ring, dynamic ring seat, dynamic ring gland) can be disassembled and replaced independently, simplifying the maintenance process. When a component is damaged or needs to be cleaned, there is no need to disassemble the entire system, saving time and cost. The use of fixing bolts makes installation and removal more convenient and quick, improving work efficiency. The design of the transmission bolts ensures the efficient transmission of power from the vertical shaft to the dynamic ring, reducing energy loss and improving the work efficiency of the machine. Reasonable mechanical connection reduces unnecessary friction, reduces power consumption, and also reduces heat generation, which helps to maintain the normal temperature range of the equipment.

[0012] The present invention further discloses a disc centrifuge sterilization system, which utilizes a disc centrifuge to sterilize the internal mechanical seal of the disc centrifuge, and includes a sterilization module and a temperature control module. The sterilization module is connected to an external steam generating device through the steam channel, and the external steam generating device injects steam or disinfectant into the disc centrifuge through the steam channel; the temperature control module includes a temperature sensor and a control chip, the temperature sensor is arranged on the termination section, the control chip is installed in the external steam generating device, and the temperature sensor is electrically connected to the control chip.

[0013] By adopting the above technical solution, the temperature sensor is set at the terminal section of the steam channel, which can monitor the temperature changes during the sterilization process in real time. These data are transmitted to the control chip for analysis and processing to ensure that the temperature is always kept within the set range during the sterilization process. The control chip automatically adjusts the steam injection amount or stops the steam supply according to the information provided by the temperature sensor to maintain the required sterilization conditions, thereby ensuring the consistency and reliability of the sterilization effect. Since the temperature sensor is directly connected to the control chip, the system can respond quickly to temperature changes, reducing the time required to reach the target temperature and improving the sterilization efficiency. Through the optimized design of the steam channel, the steam can be evenly distributed throughout the centrifuge to ensure that all key parts can be effectively sterilized. The entire sterilization process is automatically completed by the control system without a lot of manual operation, reducing the risk of human error and saving labor costs.

[0014] Furthermore, a switch device is provided on the external steam generating device, and the switch device is electrically connected to the control chip.

[0015] By adopting the above technical solution, the connection between the switch device and the control chip makes the sterilization process fully automated. The control chip automatically controls the switch device according to the information fed back by the temperature sensor to start and stop the steam injection. This not only improves the convenience of operation, but also reduces the uncertainty caused by human intervention. The control system can automatically turn on and off the steam supply according to the preset schedule or real-time monitoring data to ensure that the sterilization process is carried out strictly in accordance with the predetermined procedure. If an abnormality is detected, the control chip can immediately cut off the steam supply through the switch device to prevent potential safety accidents. Only authorized operators can activate the switch device through the control system, reducing the risk caused by misoperation. Through intelligent control, steam is only provided when needed, avoiding unnecessary energy waste. This helps to reduce operating costs and meets the requirements of energy conservation and environmental protection. When the temperature drops below the set value, the control system can quickly restart the steam injection, ensuring the sterilization effect while saving energy. Since the steam supply is precisely controlled, the impact of frequent start and stop on the equipment is avoided, and the wear of mechanical parts is reduced, thereby extending the service life of the equipment.

[0016] The present invention further discloses a disc centrifuge sterilization method, which is characterized in that the disc centrifuge sterilization system is used to sterilize the working material in the centrifuge according to the steam temperature, comprising the following steps: Step 1: Start the sterilization process of the disc centrifuge; Step 2: After the sterilization program is started, the program instruction opens the valve between the external steam generator and the steam channel; Step 3: Steam passes through the valve and enters the sterilization channel for sterilization, while the temperature sensor of the terminal section (126) detects the sterilization temperature in real time; Step 4: When the temperature sensor detects that the sterilization temperature reaches the set upper limit, close the valve and stop the steam from entering.

[0017] By adopting the above technical solution, the temperature sensor continuously monitors the internal temperature of the centrifuge to ensure that steam injection is started in time when the temperature is lower than 121°C to maintain an effective sterilization temperature. High-temperature steam of ≥121°C can effectively kill most pathogens and microorganisms, including heat-resistant spores, ensuring the purity of the work materials. The external controller automatically controls the injection and stop of steam through the switch device, reducing human intervention and improving the safety and consistency of operation. The control system automatically adjusts according to the data of the temperature sensor to ensure that the sterilization conditions are always in the best state and avoid human errors. Steam is only provided when needed, avoiding unnecessary energy waste and reducing operating costs. When the temperature drops below the set value, the system can quickly restart steam injection to ensure the sterilization effect while saving energy. Accurate steam control avoids the impact of frequent start and stop on the equipment, reduces the wear of mechanical parts, and thus extends the service life of the equipment. Accurate temperature control maintains stable sterilization conditions and reduces the impact on the equipment under extreme conditions.

[0018] Furthermore, the external controller controls the steam with a pressure of 2 bar and a temperature of 122°C-127°C to pass through the starting section into the inclined section of the transition section one in the water inlet and outlet seat, the inclination angle of the inclined section is 45°-80°, and enters the annular channel through the horizontal section of the transition section one. The steam in the annular channel passes through the constant pressure section and finally is discharged into the terminal section through the transition section two, and finally is discharged from the water inlet and outlet seat. The external steam generating device injects sterilizing steam into the disc centrifuge for 30 minutes.

[0019] By adopting the above technical solution, steam with a controlled pressure of 2 bar and a temperature ≥121°C can effectively kill most pathogens and microorganisms, including heat-resistant spores, ensuring the purity and safety of the materials. By setting clear steam parameters, the stability of the sterilization environment is guaranteed, and the consistency and reliability of sterilization are improved. The 45°-80° inclined section helps to guide the steam into the subsequent channel section smoothly, reducing flow resistance and ensuring that the steam can be quickly and evenly distributed throughout the system. The design of the annular channel enables the steam to form a relatively uniform pressure environment in this area, and the constant pressure section further ensures the stability of the pressure throughout the sterilization process, which not only helps to improve the sterilization efficiency, but also protects the equipment from high-pressure shocks. The 30-minute continuous injection time ensures a sufficient sterilization cycle so that all internal surfaces can fully contact the high-temperature steam to achieve a thorough sterilization effect. The fixed time setting avoids incomplete sterilization caused by human judgment or external interference, and ensures the integrity of the sterilization process. The 2bar pressure setting is within a safe range, which can provide sufficient sterilization effect without causing excessive pressure on the equipment, reducing potential safety hazards. The temperature sensor monitors temperature changes in real time to ensure that the sterilization process is always in a safe and controllable state.

[0020] Furthermore, after the external controller works for 30 minutes, the external controller is turned off, and the temperature sensor detects the temperature of the sterilization module inside the disc centrifuge. When the internal temperature of the disc centrifuge is lower than 121°C, the external controller starts again to inject steam with a temperature of 122°C-127°C and a pressure of 2 bar into the disc centrifuge until the internal temperature of the disc centrifuge rises to 121°C. After continuous sterilization for 30 minutes, the disc centrifuge ends its operation, and the external controller is turned off by the switch device.

[0021] By adopting the above technical solution, steam injection is turned off after 30 minutes, and the internal temperature is monitored by a temperature sensor. When the temperature is lower than 121°C, steam injection is restarted, ensuring that all areas can reach and maintain an effective sterilization temperature, avoiding the problem of insufficient local sterilization. By repeatedly confirming and adjusting the temperature, it is ensured that the temperature is always maintained at ≥121°C during the entire sterilization process to completely kill microorganisms, including heat-resistant spores. Once a temperature drop is detected, steam injection is immediately restarted to quickly return to the temperature required for sterilization, shortening the overall sterilization time and improving work efficiency. There is no need to wait for a long time for natural cooling before reheating, making the sterilization process more compact and efficient. By accurately controlling the time and temperature of steam injection, equipment damage or safety hazards caused by excessive heating are avoided. Steam injection is stopped only when the temperature returns to the set value, ensuring that each operation is performed within a safe range. Although the system will automatically restart according to temperature changes, this method is gentler than frequent start and stop, reducing the impact on the mechanical parts of the equipment, extending the service life, maintaining stable temperature and pressure conditions, reducing the impact on the equipment under extreme conditions, and reducing the risk of wear and corrosion.

[0022] The present invention has the following beneficial effects: 1. The present invention provides steam channels on the machine cover, mechanical seal and water inlet and outlet seats, so that high-temperature steam can directly penetrate these key components, ensuring thorough sterilization inside the centrifuge, effectively avoiding microbial contamination, and ensuring the purity of materials during the treatment process. When the centrifuge is working, the external steam generating device continues to work for 30 minutes. When the temperature is not within the standard range, the external controller starts steam injection again until the temperature returns to the standard temperature, ensuring that all areas can reach and maintain an effective sterilization temperature, completely killing microorganisms, including heat-resistant spores, and ensuring the purity and safety of the materials. 2. The present invention adopts a mechanical seal design, combined with a compression spring and a dynamic ring clamping structure, to provide a better sealing effect, reduce the aging and damage problems common in traditional sealing methods, reduce the risk of seal failure, and improve the safety and reliability of the equipment. By accurately controlling the pressure and temperature of the steam, it avoids equipment damage or safety hazards caused by overheating. Stable temperature and pressure conditions reduce the impact on the equipment and reduce the risk of wear and corrosion, thereby extending the service life of the machine and reducing long-term operating costs; 3. The present invention realizes a highly automated sterilization process. The temperature sensor monitors and feeds back the temperature changes in real time. The control system automatically adjusts the steam injection amount or stops the steam supply according to these data to ensure that the sterilization conditions are always in the best state. The connection between the switch device and the control chip makes the sterilization process fully automated, reducing the uncertainty caused by human intervention, improving the safety and consistency of operation, optimizing energy use, avoiding unnecessary energy waste, and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The internal structure diagram of the disc centrifuge of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the steam channel structure of the present invention; Figure 4 It is a schematic diagram of the structure of the dynamic ring, the upper static ring and the lower static ring of the present invention; Figure 5 The figure is a flow chart of the method of the present invention.

[0024] Among them, 1-vertical shaft; 2-dynamic ring pressure cover; 3-machine seal cover; 4-water inlet and outlet seat; 5-water inlet and outlet seat pressure cover; 6-dynamic ring; 7-dynamic ring seat; 8-upper static ring; 9-lower static ring; 10-transmission bolt; 11-fixing bolt; 12-steam channel; 121-starting section; 122-transition section 1; 1221-inclined section; 1222-horizontal section; 123-annular channel; 124-constant pressure section; 125-transition section 2; 126-termination section. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0026] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a disc centrifuge includes a vertical shaft 1, a machine cover 3, a mechanical seal, an inlet and outlet water seat 4 and a steam channel. The vertical shaft 1 is installed in the machine cover 3, serving as the rotation center and the main component for power transmission; the machine cover 3 covers and protects the internal components, plays a sealing role, and provides a starting point and an end point for the steam channel. The mechanical seal is mounted on the vertical shaft 1 to ensure the sealing between the rotating parts and the stationary parts to prevent leakage; the inlet and outlet water seat 4 is mounted on the outside of the mechanical seal to guide the flow of cooling water or steam. The steam channel starts from one side of the machine cover 3, passes through the mechanical seal and the inlet and outlet water seat 4, and finally ends from the other side of the machine cover 3, and is connected to an external steam generating device to ensure that high-temperature steam can circulate throughout the system for sterilization; The upper static ring 8 is located at the top and cooperates with the dynamic ring 6 to form a sealing surface; the dynamic ring 6 is located between the upper static ring 8 and the lower static ring 9 and rotates with the vertical shaft 1; the dynamic ring pressure cover 2 fixes the dynamic ring 6 and ensures its stable position by clamping; the lower static ring 9 is located at the bottom and cooperates with the dynamic ring 6 to form another sealing surface; the compression spring is arranged between the top of the upper static ring 8 and the bottom of the lower static ring 9, abutting against the inner side of the machine seal cover 3, providing continuous pressure to maintain close contact of the sealing interface; the inlet and outlet water seat pressure cover 5 is installed above the inlet and outlet water seat 4, and a machine seal cover 3 is provided on the top to further strengthen the entire structure; The starting section 121 is horizontally arranged at one end of the water inlet and outlet seat 4 as a steam entry point; the starting section 121 extends obliquely upward in the water inlet and outlet seat 4 to form an inclined section 1221, which helps guide the steam to smoothly enter the subsequent channel part; the inclined section 1221 is connected with the water inlet and outlet seat pressure cover 5 to form a transition section 122, which passes through the water inlet and outlet seat pressure cover 5 in the horizontal direction; the transition section 122 is connected with the annular channel 123, so that the steam can form a relatively uniform pressure environment in this area; the steam in the annular channel 123 passes through the constant pressure section 124 to maintain a stable high-pressure state to ensure the consistency of pressure during the sterilization process; a boosting end connected to the annular channel 123 is arranged on the outer side of the lower static ring 9, and the boosting end is connected to the transition section 2 125, which passes through the machine cover 3, the water inlet and outlet seat pressure cover 5, and the water inlet and outlet seat 4 in the vertical direction, and is connected with the terminal section 126; the terminal section 126 is horizontally arranged at the other end of the water inlet and outlet seat 4 as a steam discharge point; The transmission bolt 10 is sleeved on the vertical shaft 1 and connected to the dynamic ring 6 to ensure that the power is transmitted from the vertical shaft 1 to the dynamic ring 6; the dynamic ring seat 7 installs the dynamic ring 6 to provide support for it; the dynamic ring gland 2 not only fixes the dynamic ring 6, but also fixes it in the machine seal cover 3 through the fixing bolts 11 to enhance the stability of the entire sealing system; the fixing bolts 11 are used to firmly fix the dynamic ring gland 2 in the machine seal cover 3 to ensure that all components are tightly connected. This design not only achieves an efficient sterilization effect, but also enhances the sealing performance, prolongs the equipment life, and simplifies the maintenance process. It is particularly suitable for industries with high requirements for sanitary conditions and product quality, such as biopharmaceuticals and food processing.

[0028] The present invention further discloses a disc centrifuge sterilization system, which uses a disc centrifuge to sterilize the internal structure of the centrifuge, including a sterilization module and a temperature control module, and a switch device arranged on an external steam generator to realize automatic control. The sterilization module is connected to the external steam generator through a steam channel 12, which is responsible for injecting high-temperature and high-pressure steam or disinfectant into the disc centrifuge to ensure that all internal components are thoroughly sterilized. The steam channel 12, as a channel for steam transmission, extends from the external steam generator to the inside of the disc centrifuge, passes through the machine cover 3, the mechanical seal, the inlet and outlet water seat 4, and finally reaches the terminal section 126. The external steam generator generates and maintains high-temperature and high-pressure steam at 121°C and a pressure of 2bar. The steam temperature is maintained at 121°C and the pressure is maintained at 2bar, which can completely kill the bacteria generated by the internal structure of the centrifuge, avoid the internal contamination of the centrifuge causing the contamination of the work materials, ensure effective sterilization effect, and integrate with the control system, which can automatically adjust the supply and temperature of steam as needed.

[0029] The temperature control module consists of a temperature sensor and a control chip, which is used to monitor and control the temperature changes during the sterilization process in real time to ensure that the sterilization conditions are always in the best state. The temperature sensor is set on the terminal section 126 of the steam channel, which can detect the temperature inside the disc centrifuge in real time and feed the data back to the control chip installed in the external steam generator. The control chip receives data from the temperature sensor and automatically adjusts the steam injection amount or stops the steam supply according to the preset parameters to maintain the required sterilization conditions. In addition, the control chip can also record the data of each sterilization process for subsequent review and quality traceability.

[0030] In order to further improve the intelligence level of the system, a switch device electrically connected to the control chip is set on the external steam generator to realize the automatic management of the sterilization process. The functions of the switch device include: automatic start and stop: the control chip automatically controls the switch device according to the information fed back by the temperature sensor to realize the start and stop of steam injection; emergency stop function: if an abnormal situation is detected when the temperature exceeds 200 degrees Celsius, the control chip can immediately cut off the steam supply through the switch device to prevent potential safety accidents; energy-saving mode: through intelligent control, steam is only provided when needed, and each steam supply is 30 minutes, avoiding unnecessary energy waste, reducing operating costs, and meeting the requirements of energy saving and environmental protection.

[0031] like Figure 5 As shown, the present invention further discloses a disc centrifuge sterilization method, which uses a disc centrifuge sterilization system to sterilize the working material in the centrifuge according to the steam temperature, comprising the following steps: Step 1: Start the sterilization process of the disc centrifuge; Step 2: After the sterilization program is started, the program instruction opens the valve between the external steam generator and the steam channel; Step 3: Steam passes through the valve and enters the sterilization channel for sterilization, while the temperature sensor of the terminal section (126) detects the sterilization temperature in real time; Step 4: When the temperature sensor detects that the sterilization temperature reaches the set upper limit, close the valve and stop the steam from entering.

[0032] First, in the temperature detection stage, the temperature of the steam inside the disc centrifuge is detected in real time by a temperature sensor installed on the steam channel terminal section 126 to ensure accurate grasp of the initial temperature conditions, providing a basis for subsequent sterilization operations; Next, at the start-up steam injection stage, when the internal temperature of the disc centrifuge is detected to be lower than 121°C, the external steam generating device is started and steam at 127°C and a pressure of 2 bar is injected into the disc centrifuge through the steam channel 12, thereby ensuring the effective establishment of a sterilization environment so that all internal components can be exposed to sufficient heat to kill microorganisms; Then it enters the steam circulation and sterilization stage, and the injected steam passes through the following paths in sequence: the starting section 121 serves as the steam entry point; the inclined section 1221 extends upward from the starting section 121 in the water inlet and outlet seat 4 at an angle of 45°, which helps guide the steam to smoothly enter the subsequent channel part and facilitates the starting section 121 to connect to the external steam generating device; the transition section 122 is formed by the inclined section 1221 being connected with the water inlet and outlet seat pressure cover 5, and passes through the water inlet and outlet seat pressure cover 5 in the horizontal direction; the annular channel 123 forms a relatively uniform pressure environment in this area; the constant pressure section 124 maintains a stable high-pressure state to ensure the consistency of pressure during the sterilization process; the transition section 2 125 passes through the machine sealing cover 3, the water inlet and outlet seat pressure cover 5, and the water inlet and outlet seat 4 in the vertical direction, and is connected to the terminal section 126; the terminal section 126 serves as the steam discharge point and is finally discharged from the water inlet and outlet seat 4. The entire sterilization process lasts for 30 minutes, ensuring that all internal surfaces can fully contact the steam to achieve a thorough sterilization effect; Finally, at the end of sterilization and the temperature monitoring stage, after sterilization, the external controller stops steam injection through the switch device. At this time, the temperature sensor continues to monitor the internal temperature of the disc centrifuge. If the temperature drops below 121°C again, the control system will restart steam injection until the temperature rises back to 121°C. The specific process includes: after the first sterilization cycle, the control chip stops steam injection through the switch device; the temperature sensor continuously monitors the internal temperature, and when the temperature is lower than 121°C, it triggers the restart mechanism; the external controller starts again and injects steam at a temperature of 121°C and a pressure of 2 bar into the disc centrifuge until the temperature rises back to 121°C; when the entire sterilization process is completed, the external controller is turned off through the switch device to ensure safe operation.

[0033] Working principle: Steam at 121°C enters the disc centrifuge through the steam channel, which can destroy proteins, enzymes and other key molecular structures in microbial cells, causing them to lose activity or function, thereby killing microorganisms. Under a pressure of 2 bar, the boiling point of water increases, allowing steam to remain liquid at a higher temperature, providing a more lasting high-temperature environment and enhancing the sterilization effect. High-temperature and high-pressure steam has good permeability and diffusivity, and can be quickly and evenly distributed to all surfaces inside the centrifuge, including hard-to-reach corners and gaps, ensuring sterilization without dead ends; at the same time, after steam enters the system, it can quickly increase the internal temperature, shorten the time to reach sterilization conditions, and improve the sterilization efficiency. By setting the duration of the sterilization process to 30 minutes, it is ensured that all microorganisms The spores and their spores have enough time to be exposed to the high temperature environment to achieve thorough sterilization; the temperature sensor is used to monitor and feedback the temperature change in real time, and the control system automatically adjusts the steam injection amount according to the preset parameters to maintain stable sterilization conditions and avoid incomplete sterilization due to temperature fluctuations. The design of mechanical seals and steam channels ensures that no external pollutants are introduced during the sterilization process, while preventing the internal sterilized area from being contaminated again; the intelligent management of external controllers and switch devices reduces the uncertainty caused by human intervention and further reduces the risk of secondary contamination. High-temperature and high-pressure steam directly destroys the cell structure of microorganisms and is the most direct and effective sterilization method; in some cases, disinfectant can also be injected through the steam channel to enhance the sterilization effect by using the antibacterial properties of chemical agents; First, the temperature inside the disc centrifuge is detected in real time by the temperature sensor installed on the terminal section 126 of the steam channel to ensure the accurate grasp of the initial temperature conditions and provide a basis for the subsequent sterilization operation. When it is detected that the internal temperature of the disc centrifuge is lower than 121°C, the external steam generator is started, and high-temperature and high-pressure steam at 121°C and a pressure of 2 bar is injected into the disc centrifuge through the steam channel 12 to ensure the effective establishment of the sterilization environment, so that all internal components and materials can be exposed to sufficient heat to kill microorganisms. The injected steam passes through the starting section 121, the inclined section 1221, the transition section 1 122, the annular channel 123, the constant pressure section 124, the transition section 2 125, and finally discharged from the terminal section 126. The entire sterilization process lasts for 30 minutes, ensuring that all internal surfaces can fully contact the high-temperature steam to achieve a thorough sterilization effect. After the sterilization is completed, the external controller stops the steam injection through the switch device; at this time, the temperature sensor continues to monitor the internal temperature of the disc centrifuge. If the temperature drops below 121°C again, the control system will restart the steam injection until the temperature rises back to 121°C. Finally, when the entire sterilization process is completed, the external controller is turned off by the switch device to ensure safe operation.

[0034] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A disc centrifuge, characterized in that: The invention comprises a vertical shaft (1), a machine seal cover (3), a mechanical seal, a water inlet and outlet seat (4) and a steam passage (12), wherein the vertical shaft (1) is installed in the machine seal cover (3), the mechanical seal is sleeved on the vertical shaft (1), the water inlet and outlet seat (4) is sleeved on the mechanical seal, the steam passage (12) starts from one side of the machine seal cover (3), passes through the mechanical seal and the water inlet and outlet seat (4) respectively, and is terminated at the other side of the machine seal cover (3), and the steam passage (12) is connected to an external steam generating device.

2. The disc centrifuge according to claim 1, characterized in that: The mechanical seal comprises an upper stationary ring (8), a movable ring (6), a movable ring pressure cover (2) and a lower stationary ring (9); the movable ring (6) is located between the upper stationary ring (8) and the lower stationary ring (9); the movable ring (6) is clamped on the movable ring pressure cover (2); a compression spring is arranged at the top of the upper stationary ring (8) and the bottom of the lower stationary ring (9); the compression spring abuts against the inner side of the mechanical seal cover (3); an inlet and outlet seat pressure cover (5) is arranged above the inlet and outlet seat (4); and the mechanical seal cover (3) is arranged on the top of the inlet and outlet seat pressure cover (5).

3. The disc centrifuge according to claim 2, characterized in that: The steam channel (12) comprises a starting section (121), a transition section 1 (122), an annular channel (123), a constant pressure section (124), a transition section 2 (125) and a terminal section (126); the starting section (121) and the terminal section (126) are arranged at both ends of the water inlet and outlet seat (4) along a horizontal direction; the starting section (121) extends upwardly in the water inlet and outlet seat (4) to form an inclined section (1221); the inclined section (1221) is connected to the water inlet and outlet seat gland (5) to form a The transition section 1 (122) is formed, and the transition section 1 (122) passes through the water inlet and outlet seat pressure cover (5) in the horizontal direction and is connected to the annular channel (123). The boost end connected to the annular channel (123) is provided on the outer side of the lower static ring (9), and the boost end is connected to the transition section 2 (125). The transition section 2 (125) passes through the machine seal cover (3), the water inlet and outlet seat pressure cover (5), the water inlet and outlet seat (4) in the vertical direction and is connected to the terminal section (126).

4. The disc centrifuge according to claim 2, characterized in that: The vertical shaft (1) is also provided with a transmission bolt (10), the transmission bolt (10) is sleeved on the vertical shaft (1), the transmission bolt (10) is connected to the moving ring (6), the moving ring (6) is mounted on the moving ring seat (7), the moving ring seat (7) is also provided with the moving ring cover (2), the moving ring cover (2) is also provided with a fixing bolt (11), and the moving ring cover (2) is fixed in the machine seal cover (3) by the fixing bolt (11).

5. A disc centrifuge sterilization system, characterized in that: The disc centrifuge according to any one of claims 1 to 3 is used to sterilize the internal mechanical seal of the disc centrifuge, comprising a sterilization module and a temperature control module, wherein the sterilization module is connected to an external steam generating device through the steam channel (12), and the external steam generating device injects steam into the disc centrifuge through the steam channel (12); the temperature control module comprises a temperature sensor and a control chip, wherein the temperature sensor is arranged on the terminal section (126), the control chip is installed in the external steam generating device, and the temperature sensor is electrically connected to the control chip.

6. The disc centrifuge sterilization system according to claim 5, characterized in that: The external steam generating device is provided with a switch device, and the switch device is electrically connected to the control chip.

7. A disc centrifuge sterilization method, characterized in that: Using the disc centrifuge sterilization system according to any one of claims 5 to 6 to sterilize the working material in the centrifuge according to the steam temperature, comprising the following steps: Step 1: Start the sterilization process of the disc centrifuge; Step 2: After the sterilization program is started, the program instruction opens the valve between the external steam generator and the steam channel; Step 3: Steam passes through the valve and enters the sterilization channel for sterilization, while the temperature sensor of the terminal section (126) detects the sterilization temperature in real time; Step 4: When the temperature sensor detects that the sterilization temperature reaches the set upper limit, close the valve and stop the steam from entering.

8. The disc centrifuge sterilization method according to claim 7, characterized in that: In step 2 and step 3, the external controller controls steam with a pressure of 2 bar and a temperature of 122° C.-127° C. to pass through the starting section (121) into the inclined section (1221) of the transition section 1 (122) in the water inlet and outlet seat (4), wherein the inclination angle of the inclined section (1221) is 45°-80°, and enters the annular channel (123) through the horizontal section (1222) of the transition section 1 (122). The steam in the annular channel (123) passes through the constant pressure section (124), and finally passes through the transition section 2 (125) to be discharged into the terminal section (126), and finally is discharged from the water inlet and outlet seat (4). The external steam generating device injects sterilizing steam into the disc centrifuge for a duration of 30 minutes.

9. The disc centrifuge sterilization method according to claim 7, characterized in that: In step 4, after the external controller works for 30 minutes, the external controller is turned off, and the temperature sensor detects the temperature of the sterilization module inside the disc centrifuge. When the internal temperature of the disc centrifuge is lower than 121°C, the external controller starts again to inject steam with a temperature of 122°C-127°C and a pressure of 2 bar into the disc centrifuge until the internal temperature of the disc centrifuge rises to 121°C. After continuous sterilization for 30 minutes, the disc centrifuge ends its operation, and the external controller is turned off by the switch device.

Images