Steam heating sterilization system

Abstract

The invention provides a steam heating and sterilizing system. The steam heating and sterilizing system comprises a heating device, a steam generating device, a sterilizing device, a secondary heating device, a steam-liquid separating device, a condensing device, a sewage filtering device and a sewage discharging device, the heating device is communicated with the steam generating device; the steam generation device is communicated with the sterilization device; the sterilization device is communicated with the secondary heating device and the vapor-liquid separation device; the vapor-liquid separation device is communicated with the condensing device, and the vapor-liquid separation device and the condensing device are both communicated with the sewage filtering device; the sewage filtering device is respectively communicated with the heating device and the sewage discharging device; through cooperative work of a plurality of devices, efficient sterilization treatment of to-be-sterilized articles is achieved, meanwhile, waste water is recycled and purified, and the environmental protection property and the resource utilization rate of the system are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature sterilization, and particularly to a steam heating sterilization system. Background Art

[0002] In industries such as medical, biological, and food, efficient and reliable sterilization of items is a crucial step. Traditional sterilization systems have low energy utilization efficiency, waste energy, and have certain deficiencies in terms of the stability of sterilization effect and operation convenience. Summary of the Invention

[0003] The present invention provides a steam heating sterilization system to solve the problems of low energy utilization efficiency and energy waste in traditional sterilization systems.

[0004] To solve the above technical problems, the technical solution of the present invention is as follows:

[0005] A steam heating sterilization system includes:

[0006] A heating device, a steam generation device, a sterilization device, a secondary heating device, a steam-liquid separation device, a condensation device, a sewage filtration device, and a sewage discharge device;

[0007] The heating device is connected to the steam generation device;

[0008] The steam generation device is connected to the sterilization device;

[0009] The sterilization device is connected to the secondary heating device and the steam-liquid separation device;

[0010] The steam-liquid separation device is connected to the condensation device, and both the steam-liquid separation device and the condensation device are connected to the sewage filtration device;

[0011] The sewage filtration device is respectively connected to the heating device and the sewage discharge device;

[0012] The heating device heats the water at the first temperature to obtain the water at the second temperature and inputs it into the steam generation device; the steam generation device processes the water at the second temperature to obtain the steam at the second temperature and inputs it into the sterilization device; the items to be sterilized in the sterilization device are sterilized by the steam at the second temperature; after the sterilization treatment, the steam and liquid water mixture is input into the steam-liquid separation device to separate the steam from the liquid water and then input into the sewage filtration device for treatment.

[0013] Optionally, an electromagnetic heating module or an electric heating rod heating module is provided in the heating device.

[0014] Optionally, the steam generating device includes a steam generator which is in communication with the heating device, and the steam generator converts the second-temperature water output by the heating device into second-temperature steam;

[0015] A pressure sensor and a temperature sensor connected to the steam generator.

[0016] Optionally, the sterilization device includes a sterilization tank which is in communication with the steam generating device and is used for accommodating the articles to be sterilized and the second-temperature steam;

[0017] A stirring mechanism is arranged inside the sterilization tank and is used for stirring the articles to be sterilized inside the sterilization tank.

[0018] Optionally, the stirring mechanism includes a stirring paddle;

[0019] A stirring shaft fixedly connected to the stirring paddle;

[0020] A variable-frequency motor fixedly connected to the stirring shaft, and the variable-frequency motor drives the stirring shaft to rotate.

[0021] Optionally, the secondary heating device is arranged outside the sterilization tank, and a heating medium is filled in the secondary heating device.

[0022] Optionally, the vapor-liquid separation device includes a first separation layer and a second separation layer;

[0023] The first separation layer separates the steam and liquid water mixture to obtain liquid water, and the first separation layer is in communication with the sewage filtering device and inputs the separated liquid water into the sewage filtering device;

[0024] The second separation layer separates the steam and liquid water mixture to obtain steam, and the second separation layer is in communication with the condensation device and inputs the separated steam into the condensation device.

[0025] Optionally, the condensation device is a water-cooled condenser or an isolated air-cooled condenser.

[0026] Optionally, the sewage filtering device includes an activated carbon adsorption tower and an ozone oxidation tank, and the activated carbon adsorption tower is in communication with the vapor-liquid separation device and the condensation device;

[0027] The ozone oxidation tank is in communication with the vapor-liquid separation device and the condensation device.

[0028] Optionally, the sewage discharging device is in communication with the sewage filtering device through a corrosion-resistant pipeline to discharge the treated sewage.

[0029] The above solution of the present invention has at least the following beneficial effects:

[0030] In the above solution of the present invention, a heating device is communicated with the steam generating device; the steam generating device is communicated with the sterilizing device; the sterilizing device is communicated with the secondary heating device and the steam-liquid separation device; the steam-liquid separation device is communicated with the condensing device, and both the steam-liquid separation device and the condensing device are communicated with the sewage filtering device; the sewage filtering device is respectively communicated with the heating device and the sewage discharging device; the heating device heats the water at the first temperature to obtain the water at the second temperature and inputs it into the steam generating device; the steam generating device processes the water at the second temperature to obtain the steam at the second temperature and inputs it into the sterilizing device; the articles to be sterilized in the sterilizing device are sterilized by the steam at the second temperature; after the sterilization treatment, the mixture of steam and liquid water is input into the steam-liquid separation device to separate the steam from the liquid water and then input into the sewage filtering device for treatment. The efficient sterilization treatment of the articles to be sterilized is realized, and at the same time, the waste water is recovered and purified, ensuring the environmental protection and resource utilization rate of the system. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of a steam heating sterilization system provided by an embodiment of the present invention. Detailed Embodiments

[0032] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0033] As Figure 1 shown, an embodiment of the present invention provides a steam heating sterilization system, including:

[0034] a heating device 1, a steam generating device 2, a sterilizing device 3, a secondary heating device 4, a steam-liquid separation device 5, a condensing device 6, a sewage filtering device 7 and a sewage discharging device 8;

[0035] The heating device 1 is communicated with the steam generating device 2;

[0036] The steam generating device 2 is communicated with the sterilizing device 3;

[0037] The sterilizing device 3 is communicated with the secondary heating device 4 and the steam-liquid separation device 5;

[0038] The steam-liquid separation device 5 is communicated with the condensing device 6, and both the steam-liquid separation device 5 and the condensing device 6 are communicated with the sewage filtering device 7;

[0039] The sewage filtration device 7 is respectively communicated with the heating device 1 and the sewage discharge device 8;

[0040] The heating device 1 heats the first temperature water to obtain the second temperature water and inputs it into the steam generating device 2; the steam generating device 2 processes the second temperature water to obtain the second temperature steam and inputs it into the sterilization device 3; the second temperature steam is used to sterilize the articles to be sterilized in the sterilization device 3; after the sterilization treatment, the steam and liquid water mixture is input into the steam-liquid separation device 5 to separate the steam from the liquid water and then input into the sewage filtration device 7 for treatment.

[0041] In this embodiment, the heating device 1, the steam generating device 2, the sterilization device 3, the secondary heating device 4, the steam-liquid separation device 5, the condensation device 6, the sewage filtration device 7 and the sewage discharge device 8 are connected by pipelines. The low-temperature water at the initial temperature enters the heating device 1 and is heated by the heating element to reach the high-temperature water at the preset second temperature. The heated high-temperature water is transported to the steam generating device 2 for subsequent steam generation; the steam generating device 2 receives the high-temperature water from the heating device 1 and is converted into high-temperature steam by heating or decompression evaporation. The generated high-temperature steam is transported to the sterilization device 3 for sterilization treatment, and the temperature and pressure of the steam can be adjusted according to the sterilization requirements; after the high-temperature steam enters the sterilization device 3, bacteria, viruses and other microorganisms on the surface of the articles to be sterilized are killed through the high-temperature and high-pressure environment. The sterilization device 3 is designed as a closed container to ensure that the steam can be evenly distributed and fully contact the articles to be sterilized. After the sterilization is completed, the mixture of steam and condensed water (liquid water) is transported to the steam-liquid separation device 5; the secondary heating device 4 is arranged outside the sterilization device 3 to continuously heat the sterilization device 3, so that the condensed water is evaporated into steam again and continuously heated, ensuring that the steam temperature in the sterilization tank always remains at the required temperature point (such as 135 degrees) to ensure the sterilization effect; after the mixture of steam and liquid water enters the steam-liquid separation device 5, the steam and liquid water are separated by means of gravity separation, centrifugal separation or filtration, etc., and then the steam is liquefied into condensed water through the condensation device 6. After the condensed water is formed, it enters the sewage filtration device 7 for treatment after simple stratification; after the liquid water from the steam-liquid separation device 5 and the condensation device 6 enters the sewage filtration device 7, impurities, pollutants and microorganisms in the water are removed through physical filtration, chemical treatment or biological treatment, etc. The water after filtration and purification can be recycled and re-entered into the heating device 1 for recycling, while the sewage that cannot be recycled is transported to the sewage discharge device 8.

[0042] The steam heating sterilization system of this embodiment realizes the efficient sterilization treatment of the articles to be sterilized through the coordinated work of multiple devices, and at the same time recovers and purifies the wastewater to ensure the environmental protection and resource utilization rate of the system.

[0043] In an alternative embodiment of the present invention, an electromagnetic heating module or an electric heating rod heating module is provided in the heating device 1.

[0044] In this embodiment, an electromagnetic heating module or an electric heating rod heating module is provided in the heating device 1. Electromagnetic heating has the advantages of rapid temperature rise and precise temperature control; heating rod heating has the characteristics of low cost and simple structure.

[0045] In an alternative embodiment of the present invention, the steam generating device 2 includes a steam generator, which is connected to the heating device 1. The steam generator converts the second-temperature water output by the heating device 1 into second-temperature steam;

[0046] A pressure sensor and a temperature sensor connected to the steam generator.

[0047] In this embodiment, the steam generating device 2 generates high-temperature steam through the steam generator to provide heat source for the sterilization process. The temperature and pressure of the high-temperature steam should be able to meet the sterilization requirements of different items. The steam generating device 2 is equipped with monitoring devices such as a pressure sensor and a temperature sensor to monitor the parameters of the steam in real time and adjust them through the control system to ensure the quality and stability of the steam.

[0048] In an alternative embodiment of the present invention, the sterilization device 3 includes a sterilization tank, which is connected to the steam generating device 2 and is used to accommodate the items to be sterilized and the second-temperature steam;

[0049] A stirring mechanism is provided inside the sterilization tank for stirring the items to be sterilized inside the sterilization tank.

[0050] In this embodiment, the sterilization device 3 is the core of the sterilization system and is used to accommodate the items to be sterilized and the high-temperature steam. The sterilization tank should have good sealing performance, pressure resistance performance and heat preservation performance. A stirring mechanism is provided inside the tank to enable the items to be fully contacted with the steam and improve the sterilization effect. The stirring mechanism should have the characteristics of corrosion resistance, high temperature resistance, etc., and operate stably and reliably.

[0051] In an alternative embodiment of the present invention, the stirring mechanism includes a stirring paddle;

[0052] A stirring shaft fixedly connected to the stirring paddle;

[0053] A variable-frequency motor fixedly connected to the stirring shaft, and the variable-frequency motor drives the stirring shaft to rotate.

[0054] In this embodiment, the stirring paddle, the stirring shaft and the variable-frequency motor are connected in sequence. After the variable-frequency motor is started, it drives the stirring shaft to rotate, and the stirring shaft then transmits the power to the stirring paddle to make it rotate, realizing the stirring of the material.

[0055] The shape and size of the stirring paddle are designed according to specific applications. Common shapes include blade type, spiral type, anchor type, etc. The variable-frequency motor is the power source for driving the stirring shaft and the stirring paddle. By changing the power supply frequency to adjust the motor speed, the stirring speed can be precisely controlled, improving the flexibility and efficiency of the equipment.

[0056] In the embodiments of the present invention, when the sterilization tank is sterilizing, in order to improve the sterilization effect, it can be carried out in the following ways:

[0057] Obtain parameters, including temperature, pressure, time, as well as humidity, waste loading, waste type, etc. The sterilization effect may need to be measured by the kill rate or the reduction in the amount of microorganisms.

[0058] By Determine the time required to reduce the number of microorganisms by a preset ratio at temperature t0, for example, in minutes;

[0059] Where, T t0 is the time required to reduce the number of microorganisms by 90% at temperature t0, N0 is the initial amount of microorganisms, and N1 is the amount of microorganisms after sterilization.

[0060] By Determine the sterilization rate constant;

[0061] Where, k is the sterilization rate constant, which is inversely proportional to T t0 E a is the activation energy of microorganisms (J / mol), R is the ideal gas constant, and T is the absolute temperature.

[0062] The sterilization effect is determined by That is, the probability of microorganism survival is less than or equal to a preset value.

[0063] Furthermore, under the condition of meeting the sterilization effect, the sterilization time or energy consumption can be minimized. Minimize the energy consumption through the following formula,

[0064]

[0065] s.t.LogReduction≥6

[0066] T min ≤T(t)≤T max

[0067] P(t)≥P sat (T(t))(guarantee saturated steam)

[0068] Among them, P(t) is the pressure at time t, logReduction is the above-mentioned X, that is, the sterilization effect; Psat is the pressure at time T(t), Tmax is the maximum sterilization time, Tmin is the minimum sterilization time; E(T) is the energy consumption function related to temperature.

[0069] By the above method, the sterilization effect of the sterilization tank can be greatly improved during sterilization.

[0070] In an alternative embodiment of the present invention, the secondary heating device 4 is arranged outside the sterilization tank, and the secondary heating device 4 is filled with a heating medium.

[0071] In this embodiment, the secondary heating device 4 is wrapped outside the sterilization tank. There are two heating methods: heat-conducting oil heating or high-temperature steam heating. The heating medium can be any liquid or gas (vapor) with stable performance, generally outside the tank body where the condensed water is located. When the steam in the sterilization tank liquefies into condensed water during the sterilization process, the secondary heating device 4 starts and keeps heating, evaporating the condensed water into steam again and continuously raising the temperature, ensuring that the steam temperature in the sterilization tank always remains around the required temperature point (such as 135 degrees) to ensure the sterilization effect. Heat-conducting oil heating has the advantages of uniform temperature and moderate heating rate; high-temperature steam heating can quickly increase the steam temperature. Select a suitable secondary heating method according to the actual situation, or use the two methods in combination.

[0072] In an alternative embodiment of the present invention, the vapor-liquid separation device 5 includes a first separation layer and a second separation layer;

[0073] The first separation layer separates the steam and liquid water mixture to obtain liquid water, and the first separation layer is connected to the sewage filtration device 7 to input the separated liquid water into the sewage filtration device 7;

[0074] The second separation layer separates the steam and liquid water mixture to obtain steam, and the second separation layer is connected to the condensation device 6 to input the separated steam into the condensation device 6.

[0075] In this embodiment, the vapor-liquid separation device 5 is a key component in the steam heating sterilization system, responsible for separating the steam and liquid water mixture after sterilization. According to the description, the vapor-liquid separation device 5 includes a first separation layer and a second separation layer, which are respectively used to separate liquid water and steam. The vapor-liquid separation device 5 separates the steam and liquid water mixture output by the sterilization device 3. After the liquid water is separated by the first separation layer, it is transported to the sewage filtration device 7 for filtration and purification. After the steam is separated by the second separation layer, it is transported to the condensation device 6 for condensation treatment.

[0076] During specific operation, the steam and liquid water mixture from the sterilization device 3 enters the vapor-liquid separation device 5. First, it passes through the first separation layer, which uses techniques such as gravity separation, centrifugal separation, or filtration separation to separate the liquid water. The separated liquid water is transported through a pipeline to the sewage filtration device 7 for filtration and purification treatment. After the mixture passes through the first separation layer, the remaining steam and a small amount of liquid water enter the second separation layer, which uses techniques such as baffle separation, cyclone separation, or adsorption separation to separate the steam. The steam enters the condensation device 6 for condensation treatment.

[0077] Through the coordinated operation of the first separation layer and the second separation layer in the vapor-liquid separation device 5, efficient separation of steam and liquid water is achieved. This design not only improves the resource recovery rate of the system but also ensures environmental protection and operating efficiency.

[0078] In an alternative embodiment of the present invention, the condensation device 6 is a water-cooled condenser or an isolated air-cooled condenser.

[0079] In this embodiment, the condensation device 6 is used to condense the steam separated by the gas-liquid separation system and convert it into liquid water. The condensation device 6 can use equipment such as a water-cooled condenser or an isolated air-cooled condenser, which is selected and designed according to actual conditions.

[0080] In an alternative embodiment of the present invention, the sewage filtration device 7 includes an activated carbon adsorption tower and an ozone oxidation tank, and the activated carbon adsorption tower is connected to the vapor-liquid separation device 5 and the condensation device 6;

[0081] The ozone oxidation tank is connected to the vapor-liquid separation device 5 and the condensation device 6.

[0082] In this embodiment, the sewage filtration device 7 is an important part of the steam heating sterilization system, responsible for filtering and purifying the liquid water from the vapor-liquid separation device 5 and the condensation device 6, removing pollutants such as impurities, organic matter, and microorganisms in the water, and ensuring that the water quality meets the standards for recycling or safe discharge. The sewage filtration device 7 includes an activated carbon adsorption tower and an ozone oxidation tank. The activated carbon adsorption tower is used to adsorb pollutants such as organic matter, pigments, and odors in the water, and the ozone oxidation tank is used to decompose organic matter in the water and kill microorganisms through ozone oxidation.

[0083] In an alternative embodiment of the present invention, the sewage discharge device 8 is connected to the sewage filtration device 7 through a corrosion-resistant pipeline to discharge the treated sewage.

[0084] In this embodiment, the sewage discharge device 8 is used to discharge the sewage treated by the sewage filtration device 7 into the designated sewage pipeline. The sewage discharge device 8 has good sealing performance and corrosion resistance to prevent sewage leakage and environmental pollution. The heating system in the steam heating and sterilization system of the above system of the present invention mainly consists of a steam generator, and electromagnetic heating or heating rod heating methods can be adopted. Electromagnetic heating has the advantages of rapid temperature rise and precise temperature control; heating rod heating has the characteristics of low cost and simple structure. Select a suitable heating method according to actual needs to ensure that the steam generator can stably generate high-temperature steam. The steam generator should have good sealing performance and pressure resistance to ensure safe operation. The high-temperature steam generation system generates high-temperature steam through the steam generator to provide heat source for the sterilization process. The temperature and pressure of the high-temperature steam should be able to meet the sterilization requirements of different items. The system should be equipped with monitoring devices such as pressure sensors and temperature sensors to monitor the parameters of the steam in real time and adjust them through the control system to ensure the quality and stability of the steam. The high-temperature sterilization system is the core of the sterilization system and is used to accommodate the items to be sterilized and high-temperature steam. The sterilization tank should have good sealing performance, pressure resistance and heat preservation performance. A stirring mechanism is arranged inside the tank to enable the items to be fully contacted with the steam and improve the sterilization effect. The stirring mechanism should have the characteristics of corrosion resistance, high temperature resistance, etc., and operate stably and reliably. The secondary heating system of the sterilization tank includes two methods: heat-conducting oil heating or high-temperature steam heating. The heating medium can be any liquid or gas (vapor) with stable performance, generally outside the tank body at the position where the condensed water is located. During the sterilization process, when the steam in the sterilization tank liquefies into condensed water, the secondary heating system starts and keeps heating, evaporating the condensed water into steam again and continuously raising the temperature to ensure that the steam temperature in the sterilization tank always remains around the required temperature point (such as 135 degrees) to ensure the sterilization effect. Heat-conducting oil heating has the advantages of uniform temperature and moderate heating speed; high-temperature steam heating can quickly increase the steam temperature. Select a suitable secondary heating method according to the actual situation, or use the two methods in combination. The liquid-vapor separation system is used to liquefy the steam generated during the sterilization process into condensed water through the condensation system. After the condensed water is formed, it undergoes simple stratification. The slightly cleaner condensed water in the upper layer after stratification can be recycled to improve energy utilization efficiency; the dirtier condensed water in the lower layer after stratification is discharged into the special medical sewage pipeline after sewage filtration treatment. The condensation system is used to condense the steam separated by the gas-liquid separation system and convert it into liquid water. The condensation system can adopt equipment such as a water-cooled condenser or an isolated air-cooled condenser, and is selected and designed according to the actual situation. The sewage filtration system is used to filter and treat the sewage generated by the condensation system to remove impurities and harmful substances in it. The sewage filtration system can adopt methods such as physical filtration and chemical treatment, and is selected and designed according to the nature and discharge standards of the sewage. The sewage discharge system is used to discharge the sewage treated by the sewage filtration system into the designated sewage pipeline.The sewage discharge system should have good sealing performance and corrosion resistance to prevent sewage leakage and environmental pollution. The heating system provides two options: electromagnetic heating and heating rod heating, which can be flexibly selected according to actual needs. Electromagnetic heating has rapid temperature rise and precise temperature control, while heating rod heating has lower cost and simpler structure, meeting the requirements of different scenarios. The high-temperature steam generation system is equipped with monitoring devices such as pressure sensors and temperature sensors, which can monitor the parameters of steam in real time and adjust them through the control system to ensure the quality and stability of steam and meet the sterilization requirements of different items. The sterilization tank of the high-temperature sterilization system has good sealing performance, pressure resistance and heat preservation performance. The stirring mechanism in the tank enables the items to be fully contacted with steam, improving the sterilization effect. The stirring mechanism is corrosion-resistant and high-temperature resistant, with stable and reliable operation. Secondary heating to ensure sterilization effect: The secondary heating system of the sterilization tank has two methods: heat conduction oil heating and high-temperature steam heating. It can be started when the steam temperature drops to raise the steam temperature again to ensure the sterilization effect. Appropriate methods can also be selected according to actual situations or used in combination. The gas-liquid separation system separates steam and condensed water. The separated steam can be recycled after condensation, improving the energy utilization efficiency. The condensation system can use equipment such as water-cooled condensers or isolated air-cooled condensers, which are selected and designed according to actual situations to adapt to different working environments. The sewage filtration system uses methods such as physical filtration and chemical treatment to filter the sewage generated by the condensation system, removing impurities and harmful substances to meet the sewage discharge standards. The sewage discharge system has good sealing performance and corrosion resistance to prevent sewage leakage and environmental pollution, ensuring environmental protection discharge.

[0085] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle described in the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A steam heating sterilization system, characterized in that: include: A heating device (1), a steam generating device (2), a sterilizing device (3), a secondary heating device (4), a vapor-liquid separation device (5), a condensing device (6), a sewage filtering device (7) and a sewage discharge device (8); The heating device (1) is in communication with the steam generating device (2); The steam generating device (2) is connected to the sterilizing device (3); The sterilizing device (3) is in communication with the secondary heating device (4) and the vapor-liquid separation device (5); The vapor-liquid separation device (5) is in communication with the condensation device (6), and both the vapor-liquid separation device (5) and the condensation device (6) are in communication with the sewage filtering device (7); The sewage filtering device (7) is connected to the heating device (1) and the sewage discharge device (8) respectively; The heating device (1) heats water at a first temperature to obtain water at a second temperature and inputs the water into the steam generating device (2); the steam generating device (2) processes the water at the second temperature to obtain steam at a second temperature and inputs the steam into the sterilizing device (3); the articles to be sterilized in the sterilizing device (3) are sterilized by the steam at the second temperature; the steam and liquid water mixture after the sterilization is input into the steam-liquid separation device (5) to separate the steam from the liquid water and then input into the sewage filtering device (7) for treatment.

2. The steam heating sterilization system according to claim 1, characterized in that: The heating device (1) is provided with an electromagnetic heating module or an electric heating rod heating module.

3. The steam heating sterilization system according to claim 1, characterized in that: The steam generating device (2) comprises a steam generator, the steam generator is in communication with the heating device (1), and the steam generator converts the water at the second temperature outputted by the heating device (1) into steam at the second temperature; A pressure sensor and a temperature sensor are connected to the steam generator.

4. The steam heating sterilization system according to claim 1, characterized in that: The sterilization device (3) comprises a sterilization tank, which is connected to the steam generating device (2) and is used to contain the items to be sterilized and the steam at the second temperature; The sterilization tank is provided with a stirring mechanism inside for stirring the objects to be sterilized inside the sterilization tank.

5. The steam heating sterilization system according to claim 4, characterized in that: The stirring mechanism includes a stirring paddle; A stirring shaft fixedly connected to the stirring paddle; A variable frequency motor is fixedly connected to the stirring shaft, and the variable frequency motor drives the stirring shaft to rotate.

6. The steam heating sterilization system according to claim 4, characterized in that: The secondary heating device (4) is arranged outside the sterilization tank, and the secondary heating device (4) is filled with a heating medium.

7. The steam heating sterilization system according to claim 1, characterized in that: The vapor-liquid separation device (5) comprises a first separation layer and a second separation layer; The first separation layer separates the steam and liquid water mixture to obtain liquid water, and the first separation layer is connected to the sewage filtering device (7) to input the separated liquid water into the sewage filtering device (7); The second separation layer separates the steam and liquid water mixture to obtain steam, and the second separation layer is connected to the condensation device (6) to input the separated steam into the condensation device (6).

8. The steam heating sterilization system according to claim 1, characterized in that: The condensing device (6) is a water-cooled condenser or an isolated air-cooled condenser.

9. The steam heating sterilization system according to claim 1, characterized in that: The sewage filtering device (7) comprises an activated carbon adsorption tower and an ozone oxidation tank, and the activated carbon adsorption tower is connected to the vapor-liquid separation device (5) and the condensation device (6); The ozone oxidation tank is in communication with the vapor-liquid separation device (5) and the condensation device (6).

10. The steam heating sterilization system according to claim 1, characterized in that: The sewage discharge device (8) is connected to the sewage filtering device (7) through a corrosion-resistant pipe to discharge the treated sewage.

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