High temperature sterilization system

Abstract

The present invention provides a high-temperature sterilization system, which belongs to the technical field of industrial sterilization equipment, and includes a batching tank, a heat exchanger and insulator, a steam pipe, a high-temperature feed pump, a jet pump, a distribution station and a high-temperature saturated hot water tank. The heat exchanger and insulator is composed of three spiral plate channels, namely, a channel between raw material plates, a channel between insulation plates and a channel between cooked material plates. The high-temperature sterilization system provided by the present invention can reduce the heat dissipation loss of high-temperature hot materials, and recover the heat of high-temperature hot materials for preheating raw materials. At the same time, high-temperature circulating saturated hot water pre-sterilization replaces the existing steam pre-sterilization, so as to prevent the equipment from drying the materials during high-temperature steam pre-sterilization and causing channel obstruction.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial sterilization equipment, and more specifically, relates to a high-temperature sterilization system. Background Art

[0002] For high-pressure steam sterilization of liquid materials, different liquid materials require different sterilization methods. Using multiple equipment takes up a large space. No matter which sterilization equipment is used, the high-temperature clinker after sterilization will take away most of the heat, resulting in a waste of heat energy. Moreover, the sterilization system is prone to breed bacteria after not being used. It takes a lot of time to clean and pre-sterilize when it is used again, which has low work efficiency. Steam pre-sterilization will also dry out the residual materials in the equipment, causing channel obstruction. Summary of the invention

[0003] The purpose of the present invention is to provide a high-temperature sterilization system, which aims to solve the problems of large equipment space occupied during high-pressure steam sterilization of liquid materials, high-temperature clinker taking away heat and causing heat energy waste, and the sterilization system easily breeding bacteria after not being used, requiring a lot of time for cleaning and pre-sterilization when used again, and steam pre-sterilization drying out residual materials in the equipment and causing channel obstruction.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a high temperature sterilization system, comprising:

[0005] A batching tank is used to mix raw materials and has a raw material outlet at the bottom;

[0006] The heat exchanger and insulator has an insulation plate channel in the middle, and a raw material plate channel and a clinker plate channel are arranged in parallel on the outside; the raw material plate channel, the insulation plate channel and the clinker plate channel are all spiral plate structures; a raw material inlet is provided at the lower end of the raw material plate channel, and the raw material inlet is connected to the raw material outlet of the batching tank through a raw material pipeline; the upper end of the clinker plate channel is connected to the upper end of the insulation plate channel;

[0007] Steam pipe, used to input high-temperature steam;

[0008] High temperature feed pump, including a primary feed pump and a secondary booster pump, is used to transport materials or high temperature saturated hot water;

[0009] A jet pump is connected to the steam pipe and the upper end of the channel between the raw material plates, and transports the heated sterilized clinker through the sterile material pipe from the lower end inlet to the upper end outlet of the channel between the insulation plates and then into the channel between the clinker plates;

[0010] A distribution station, which is connected to the lower end of the channel between the clinker plates through a sterile material pipeline and is used to distribute the sterile material in the sterile material pipeline to the fermentation tank or the sterile material storage tank;

[0011] A high-temperature saturated hot water tank, one end of which is connected to the sterile material pipeline between the distribution station and the lower end of the clinker plate channel, and the other end of which is connected to the raw material pipeline between the raw material outlet of the batching tank and the raw material inlet of the heat exchanger and warmer;

[0012] When used for sterilization, the raw material enters the raw material plate channel of the heat exchanger and insulator from the batching tank, and is heated to the sterilization temperature by the latent heat released by the entering steam in the process of condensing into high-temperature saturated hot water with the help of a jet pump, enters the insulation plate channel of the heat exchanger and insulator from the bottom, and then enters the top of the clinker plate channel from the top of the insulation plate channel. The high-temperature sterilized material in the clinker plate channel exchanges heat with the raw material in the raw material plate channel, preheating the raw material entering the raw material plate channel from the batching tank, and the sterilized material after cooling enters the sterile material pipeline, and is then distributed to the target fermentation tank by the distribution station;

[0013] When not in use, the steam pipeline is closed, the connection between the batching tank and the raw material plate is closed, one end of the high-temperature saturated hot water tank is connected to the raw material plate channel of the heat exchanger and insulator, and the high-temperature saturated hot water passes through the raw material plate channel, the jet pump, the insulation plate channel and the clinker plate channel in turn, and finally flows back to the high-temperature saturated hot water tank to form a circulation loop.

[0014] As an embodiment of the present application, a transfer tank is further provided between the batching tank and the heat exchanger and insulator, and the transfer tank is used to transfer raw materials from at least one of the batching tanks. The transfer tank is connected to the raw material inlet of the channel between the raw material plates through a raw material pipeline to transport raw materials.

[0015] As another embodiment of the present application, the channels between the raw material plates and the channels between the cooked material plates are arranged in a double helix structure around the outside of the channels between the insulation plates.

[0016] As an embodiment of the present application, the channel between the insulation plates is a single spiral channel located in the middle of the heat exchanger and insulator.

[0017] As another embodiment of the present application, the high-temperature saturated hot water tank is provided with an exhaust pipe, and the exhaust pipe is provided with a safety valve and an exhaust valve.

[0018] As an embodiment of the present application, a high-temperature booster pump is further provided between the raw material plate channel and the jet pump.

[0019] As another embodiment of the present application, a soft water storage tank is also provided on the batching tank or the transfer tank.

[0020] As an embodiment of the present application, a high-temperature switching valve is also provided on the raw material pipeline between the transfer tank and the high-temperature saturated water tank, which is used to switch the connection between the transfer tank or the high-temperature saturated hot water tank and the channel between the raw material plates.

[0021] As another embodiment of the present application, a high-temperature feed pump is further provided between the high-temperature switching valve and the channel between the raw material plates.

[0022] As another embodiment of the present application, the high temperature sterilization system further includes:

[0023] A plurality of temperature and pressure measuring instruments are respectively arranged on the connecting pipes of each component and the high-temperature saturated hot water tank.

[0024] The beneficial effect of the high-temperature sterilization system provided by the present invention is that compared with the prior art, the high-temperature sterilization system of the present invention, the raw material prepared in the batching tank enters the raw material plate channel in the heat exchanger and insulator through the raw material pipeline, and then the high-temperature sterilized material mixed with high-temperature steam is sent to the sterile material pipeline by means of a jet pump after coming out of the raw material plate channel, the sterile pipeline transports the high-temperature sterilized material from the bottom to the insulation plate channel for continuous sterilization, and then enters the top of the clinker plate channel from the top of the insulation plate channel, and the clinker plate channel The high-temperature sterilized material exchanges heat with the raw material in the channel between the raw material plates, preheats the raw material entering the channel between the raw material plates from the batching tank, transfers the heat of the high-temperature clinker to the raw material in the channel between the raw material plates, reduces the heat taken away by the clinker, and the cooled sterilized material enters the sterile material pipeline, and is then distributed to the target fermentation tank by the distribution station; the sterilization system saves heat, can reduce the heat loss of high-temperature hot materials, and recovers the heat of high-temperature hot materials to preheat the raw materials, reducing heat loss and being more energy-efficient, and the heat exchange is concentrated in the heat exchanger and insulator to reduce the volume.

[0025] When not in use, the steam pipe is closed, the channel between the batching tank and the raw material plate is closed and connected, one end of the high-temperature saturated hot water tank is connected to the channel between the raw material plates of the heat exchanger and insulator, and the high-temperature saturated hot water passes through the channel between the raw material plates, the sterile pipe, the channel between the insulation plates and the channel between the clinker plates in turn, and finally flows back to the high-temperature saturated hot water tank to form a circulation loop. The high-temperature water in the high-temperature saturated hot water tank can clean and sterilize the sterilization system to prevent the growth of miscellaneous bacteria inside. When the temperature in the system drops, it is also in a sterile state, which can soak the residual substances attached to the inner wall of the sterilization system pipeline and maintain a sterile state. When the sterilization system needs to be used, only the sterile water mixture in the pipeline needs to be discharged to connect the batching tank for sterilization. At the same time, it avoids scaling of materials at high temperatures and causes blockage of the channel. It is easy to clean and greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a high-temperature sterilization system provided in one embodiment of the present invention.

[0028] In the figure: 1. batching tank; 101. soft water storage tank; 2. raw material pipeline; 3. fermentation tank; 4. distribution station; 5. heat exchanger and insulator; 6. channel between raw material plates; 7. channel between clinker plates; 8. channel between insulation plates; 9. jet pump; 10. high-temperature saturated hot water tank; 104. sterile material pipeline; 102. high-temperature booster pump; 103. high-temperature saturated hot water pipeline; 11. transfer tank; 14. steam pipeline; 15. agitator; 16. high-temperature material pump; 18. high-temperature switching valve; 19. raw material reflux pipeline. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The high temperature sterilization system provided by the present invention is now described. Figure 1 The high temperature sterilization system includes a batching tank 1, a heat exchanger and insulator 5, a steam pipe 14, a high temperature feed pump 16, a jet pump 9, a distribution station 4 and a high temperature saturated hot water tank 10.

[0031] The batching tank 1 is used to mix raw materials, and a raw material outlet is provided at the bottom. A heat exchanger and insulator 5 is provided with an insulation plate channel 8 in the middle, and a raw material plate channel 6 and a clinker plate channel 7 are provided in parallel on the outside; the raw material plate channel 6, the insulation plate channel 8 and the clinker plate channel 7 are all spiral plate structures; a raw material inlet is provided at the lower end of the raw material plate channel 6, and the raw material inlet is connected to the raw material outlet of the batching tank 1 through a raw material pipeline 2; the upper end of the clinker plate channel 7 is connected to the upper end of the insulation plate channel 8. The steam pipeline 14 is used to input high-temperature steam.

[0032] The high-temperature feed pump 16 includes a primary feed pump and a secondary booster pump, and is used to transport materials or high-temperature saturated hot water.

[0033] The jet pump 9 is connected with the steam pipe 14 and the upper end of the raw material plate channel 6, and transports the heated sterilized clinker through the sterile material pipe 104 from the lower end inlet to the upper end outlet of the insulation plate channel 8 to the clinker plate channel 7.

[0034] The distribution station 4 is connected to the lower end of the clinker plate channel 7 through the sterile material pipeline 104, and is used to distribute the sterile material in the sterile material pipeline 104 to the fermentation tank 3 or the sterile material storage tank. One end of the high-temperature saturated hot water tank 10 is connected to the sterile material pipeline 104 between the distribution station 4 and the lower end of the clinker plate channel 7, and the other end is connected to the raw material pipeline 2 between the raw material outlet and the raw material inlet of the batching tank 1.

[0035] When used for sterilization, the raw material enters the raw material plate channel 6 of the heat exchanger and warmer 5 from the batching tank 1, and is heated to the sterilization temperature by the latent heat released by the entering steam in the process of condensing into high-temperature saturated hot water with the help of the jet pump 9, and enters the insulation plate channel 8 of the heat exchanger and warmer 5 from the bottom for continuous sterilization, and then enters the top of the clinker plate channel 7 from the top of the insulation plate channel 8, and the high-temperature sterilized material in the clinker plate channel 7 exchanges heat with the raw material in the raw material plate channel 6, preheating the raw material entering the raw material plate channel 6 from the batching tank 1, and the sterilized material after cooling enters the sterile material pipeline 104, and is then distributed to the target fermentation tank 3 by the distribution station 4.

[0036] When not in use, the steam pipe 14 is closed, the mixing tank 1 is closed and connected to the channel 6 between the raw material plates, one end of the high-temperature saturated hot water tank 10 is connected to the channel 6 between the raw material plates of the heat exchanger and insulator 5, and the high-temperature saturated hot water passes through the channel 6 between the raw material plates, the sterile pipe, the jet pump 9, the channel 8 between the insulation plates and the channel 7 between the clinker plates in turn, and finally flows back to the high-temperature saturated hot water tank 10 to form a circulation loop.

[0037] Compared with the prior art, the high-temperature sterilization system provided by the present invention is that the raw material prepared in the batching tank 1 enters the raw material plate channel 6 in the heat exchanger and insulator 5 through the raw material pipeline 2, and then the high-temperature sterilized material mixed with high-temperature steam is sent to the sterile material pipeline 104 by means of the jet pump 9 after coming out of the raw material plate channel 6. The sterile pipeline transports the high-temperature sterilized material from the bottom to the insulation plate channel 8 for continuous sterilization, and then enters the top of the clinker plate channel 7 from the top of the insulation plate channel 8. The high-temperature sterilized material in the clinker plate channel 7 and the raw material are mixed with the raw material plate channel 6. The raw material in the channel 6 between the material plates is heat exchanged, and the raw material entering the channel 6 between the raw material plates from the batching tank 1 is preheated, and the heat of the high-temperature clinker is transferred to the raw material in the channel 6 between the raw material plates, thereby reducing the heat taken away by the clinker. The sterilized material after cooling enters the sterile material pipeline 104, and is then distributed to the target fermentation tank 3 by the distribution station 4; the sterilization system saves heat, can reduce the heat dissipation loss of the high-temperature hot material, and recovers the heat of the high-temperature hot material for preheating the raw material, thereby reducing heat loss and being more energy-efficient to use, and the heat exchange is concentrated in the heat exchanger and insulator 5 to reduce the volume.

[0038] When not in use, the steam pipe 14 is closed, the batching tank 1 is closed and connected to the channel 6 between the raw material plates, one end of the high-temperature saturated hot water tank 10 is connected to the channel 6 between the raw material plates of the heat exchanger and insulator 5, and the high-temperature saturated hot water passes through the channel 6 between the raw material plates, the sterile pipe, the channel 8 between the insulation plates and the channel 7 between the clinker plates in turn, and finally flows back to the high-temperature saturated hot water tank 10 to form a circulation loop. The high-temperature water in the high-temperature saturated hot water tank 10 can clean and sterilize the sterilization system to prevent the growth of miscellaneous bacteria inside. When the temperature in the system drops, it is also in a sterile state, which can soak the residual substances attached to the inner wall of the sterilization system pipeline and maintain a sterile state. When the sterilization system needs to be used, it only needs to discharge the sterile water mixture in the pipeline to connect the batching tank 1 for sterilization. At the same time, it avoids scaling of materials at high temperatures and causing blockage of the channel, which is convenient for cleaning and greatly improves work efficiency. An important function of this solution is to replace the existing steam pre-sterilization with high-temperature circulating saturated hot water pre-sterilization, so as to prevent the equipment from drying out the materials during high-temperature steam pre-sterilization and causing channel obstruction.

[0039] As a specific implementation of the present invention, please refer to Figure 1 A transfer tank 11 is also provided between the batching tank 1 and the heat exchanger and insulator 5. The transfer tank 11 is used to transfer the raw material of at least one batching tank 1. The transfer tank 11 is connected to the raw material inlet of the raw material plate channel 6 through the raw material pipeline 2 to transport the raw material. By setting up multiple batching tanks 1, they can be switched and used uninterruptedly, and continuous high-temperature sterilization can be achieved. In the implementation process, an agitator 15 can be added. The agitator 15 can fully stir the liquid material in the transfer tank 11 to avoid the phenomenon of material agglomeration, which not only affects the sterilization effect, but also causes the block material to block the pipeline. Specifically, the distribution station 4 in the present application can also transport sterilized clinker to multiple fermentation tanks 3 at the same time. A sewage pipe can also be provided at the end of the distribution station to discharge the cleaning sewage in the sterilization system.

[0040] As a specific implementation of the present invention, please refer to Figure 1 , the raw material plate channel 6 and the clinker plate channel 7 are arranged in a double helix structure around the outside of the insulation plate channel 8. The heat radiated outward from the insulation plate channel 8 can be used for heat exchange with the low-temperature raw material in the raw material plate channel 6. In this embodiment, the raw material plate channel 6 and the clinker plate channel 7 can be a double helix structure, and in a specific implementation, the insulation plate channel 8 is a single helix channel located in the middle of the heat exchanger 5. It prevents excessive heat loss and increases the path of high-temperature clinker, which is more conducive to continuous high-temperature sterilization.

[0041] As a specific implementation of the present invention, please refer to Figure 1, an exhaust pipe is provided on the high temperature saturated hot water tank 10. The safety valve is installed on the exhaust pipe, and the safety valve is in a normally closed state. When the pressure of the high temperature saturated hot water tank 10 rises above the specified value, the pressure in the exhaust pipe will also rise above the specified value, and the safety valve opens to release pressure to the outside of the system to prevent the pressure of the pipeline or the high temperature saturated hot water tank 10 from exceeding the specified value, avoiding damage or even explosion of the high temperature saturated hot water tank 10, which plays an important protective role in personal safety and equipment operation. The safety valve must undergo a pressure test before use. In addition, when the equipment stops intermittently, the safety valve must be repaired or replaced in time.

[0042] As a specific implementation of the present invention, please refer to Figure 1 A high temperature booster pump 102 is also provided between the raw material plate channel 6 and the jet pump 9. It is used to pressurize the raw material after passing through the raw material plate channel 6 to promote the flow of the raw material.

[0043] As a specific implementation of the present invention, please refer to Figure 1 , a stirrer 15 is provided in the batching tank 1. The stirrer 15 is longitudinally installed in the batching tank 1, and the stirrer 15 is driven by electricity. The stirrer 15 can fully stir the liquid material in the batching tank 1 to avoid the phenomenon of material agglomeration, which not only affects the sterilization effect, but also causes the block material to block the pipeline.

[0044] As a specific implementation of the present invention, please refer to Figure 1 , a soft water storage tank 101 is also provided on the batching tank 1 or the transfer tank 11. The soft water storage tank 101 can be used to replenish water in the mixing tank, and can also provide a water source for cleaning in the mixing tank; in another specific implementation process, such as in areas with poor water quality, an alkali liquid tank can also be installed on the mixing tank, and alkali liquid can be added when cleaning the system, so that the cleaning of the pipeline is faster and more effective, thereby improving the cleaning effect. Moreover, the cleaned alkali liquid can also flow back to the alkali liquid tank or the transfer tank 11 at the front end of the distribution station. When it flows back to the transfer tank 11, the sterilized pipeline can be continuously cleaned, and when it flows back to the alkali liquid tank, the system including the batching tank 1 can be continuously cleaned.

[0045] As a specific implementation of the present invention, please refer to Figure 1 A high-temperature switching valve 18 is also provided on the raw material pipeline 2 between the transfer tank 11 and the high-temperature saturated water tank 10, which is used to switch the connection between the heat exchanger and the heat preservation device 5 and the high-temperature saturated hot water tank 10 or switch the connection between the heat exchanger and the heat preservation device 5 and the batching tank 1. The high-temperature switching valve 18 is a three-way valve that can switch the connection state of the pipeline. In addition, the distribution station 4, the sterile material pipeline 104 and the high-temperature saturated hot water pipeline 103 are also connected through a three-way valve to ensure that two use states can be switched at the same time.

[0046] As a specific implementation of the present invention, please refer to Figure 1A high-temperature feed pump is also provided between the high-temperature switching valve and the raw material plate channel to provide power for the liquid material in the pipeline.

[0047] As a specific implementation of the present invention, please refer to Figure 1 The high temperature sterilization system also includes a high temperature feed pump 16. The high temperature feed pump 16 is arranged on the raw material pipeline 2 and / or the distribution station 4. In this embodiment, multiple high temperature feed pumps 16 can adopt pneumatic booster pumps, using compressed air as power to provide power for the liquid materials in the raw material pipeline 2 and the distribution station 4. In addition, the high temperature feed pump 16 can also be installed on the steam pipeline 14 to increase the pressure of the steam in the pipeline. Except for the raw material pipeline 22, the high temperature feed pumps 16 installed on other pipelines should be high temperature resistant high temperature feed pumps 16. There are certain requirements for the material of the high temperature feed pump 16. A metal high temperature feed pump 16 or a high temperature resistant plastic pump is required.

[0048] As a specific implementation of the present invention, please refer to Figure 1 The high-temperature sterilization system also includes: multiple temperature measuring instruments. Multiple temperature measuring instruments are respectively arranged on the raw material pipeline 2 and the distribution station 4 and other common-sense installation locations in the field. In this embodiment, the temperature measuring instrument can be a resistive temperature meter, which is fixedly installed on the raw material pipeline 2 and the distribution station 4 to detect raw materials and clinker, so that the operating personnel can always grasp the temperature changes of raw materials and clinker and make corresponding adjustments. For example, when the raw material temperature is low, the pressure of the jet steam of the jet pump 9 can be increased, the temperature of the steam can be increased, and the pressure of the high-temperature saturated hot water tank 10 can be increased, thereby increasing the temperature of the high-temperature hot water; when the clinker temperature is high, the pressure of the jet steam of the jet pump 9 can be appropriately reduced, and the temperature of the steam can be reduced on the premise of ensuring that the sterilization operation can be completed to avoid heat energy waste. Multiple temperature measuring instruments can be connected to an external temperature measuring LED display screen, model HX-LED375R-2, through wired or wireless modes, which is used to centrally display the sensing temperature of each temperature instrument. In addition, multiple temperature measuring instruments can be connected to an external temperature controller through a wired or wireless mode, and the temperature controller is connected to each high-temperature feeding pump 16. The model of the temperature controller can be AEG THYRO-FAMILY digital SCR temperature controller, or the model HUSKY YUDP ​​HRS integrated temperature control box can be selected. After receiving the sensed temperature of the temperature instrument, it is directly converted into a control signal and transmitted to each high-temperature feeding pump 16, thereby controlling the rotation speed of the high-temperature feeding pump 16 and changing the feeding speed of the liquid material.

[0049] As a specific implementation of the present invention, please refer to Figure 1The high temperature sterilization system also includes a plurality of opening and closing valves. The plurality of opening and closing valves are respectively arranged on the raw material pipeline 2 and the distribution station 4 and other positions installed by those skilled in the art to ensure the normal operation of the above system. In this embodiment, the plurality of opening and closing valves can be one or more of gate valves, stop valves, ball valves or butterfly valves. The opening and closing valves are not only installed on the raw material pipeline 2 and the distribution station 4, but also installed on the circulation pipe or the steam pipe, so as to facilitate the individual opening and closing of each pipeline and the individual control of the flow rate of each pipeline.

[0050] As a specific embodiment of the present invention, a raw material return pipe 19 is arranged on the front side and / or rear side of the high-temperature booster pump 102 along the flow direction of the raw material to connect to the transfer tank 11 or the batching tank 1, so as to facilitate the adjustment of the pressure in the pipe and ensure the pressure balance and stability of the system.

[0051] Working principle and detailed parameters, refer to Figure 1 The high temperature sterilization system is used to sterilize the soluble liquid materials. Add an appropriate amount of cold water at natural temperature into the batching tank 1, add the culture medium components mainly composed of yeast extract powder, peptone, sucrose, ammonium sulfate, potassium dihydrogen phosphate, etc., stir and dissolve them fully, adjust the pH value with acid and alkali, and prepare a clear fermentation medium. Use steam or ultra-high temperature hot water to sterilize the components of the high temperature sterilization system and the connecting pipes, valves and the connected fermentation tank 3. While the equipment is in a high temperature state, open the opening and closing valve of the raw material pipeline 2 (open the high temperature switching valve 18 to switch to disconnect the high temperature saturated hot water tank) and the high temperature feed pump 16, and pump the culture medium into the maintainer for raw material preheating, high temperature sterilization, clinker reflux, and finally enter the fermentation tank 3. The temperature of each temperature instrument is detected to ensure that the temperature of T2 is 125-130°C, the temperature of T3 is stable to about 140°C, and the temperature of T4 is 145-150°C. By adjusting the high temperature feed pump 16 on the channel 8 between the insulation plates, the material is controlled to flow through the maintainer in 30-40 seconds, and the sterilized clinker finally enters the fermentation tank 3 that has been sterilized in advance. During the entire sterilization process, the steam P4 pressure must be maintained at around 0.4MPa and the pressure of the high-temperature saturated hot water tank 10T3 at 0.33~0.35MPa to ensure the stability of the ultra-high temperature hot water temperature T4 and the sterilization temperature T3.

[0052] The average measurement data of the above sterilization process are listed in Table 1.

[0053] Table 1

[0054]

[0055] Assuming that the heat transfer efficiency of high-temperature hot water is 95%, and the heat loss of the equipment and connecting pipes is 10% of the total heat energy, the consumption of sterilization steam can be calculated from the data listed in Table 1 by the following formula:

[0056]

[0057] In the formula, 4.3 kJ / (kg•℃) is the average specific heat of the liquid, and 2150 kJ / kg is the latent heat of vaporization released by steam (sensible heat is negligible). The steam consumption per 100 tons of liquid sterilization is 2.83 tons, which is about 76.4% less than the average steam consumption of 12 tons / 100 tons of conventional online ultra-high temperature continuous sterilization.

[0058] In addition, the soluble components in the experimental culture medium can be replaced with insoluble components containing bean cake powder and starch (liquefied by high-temperature amylase), and fully stirred in cold water. After confirming that there is no agglomeration, the same operating steps are followed, but the high-temperature booster pump is adjusted by frequency conversion to make the hot clinker flow through the maintainer in 40 to 50 seconds. The obtained data are listed in Table 2.

[0059] Table 2

[0060]

[0061] Assuming that the heat transfer efficiency of high-temperature hot water is 92% (due to the high viscosity of the liquid, the heat transfer efficiency decreases), and the heat loss of the equipment and connecting pipes is 10% of the total heat energy, the consumption of sterilization steam can be calculated by the following formula based on the data listed in Table 2:

[0062]

[0063] In the formula, 4.3 kJ / (kg•℃) is the average specific heat of the liquid, and 2150 kJ / kg is the latent heat of vaporization released by steam (sensible heat is negligible). The steam consumption per 100 tons of liquid sterilization is 3.28 tons, which is about 74.8% less than the average steam consumption of 13 tons / 100 tons for conventional online ultra-high temperature continuous sterilization.

[0064] Working principle and detailed parameters, refer to Figure 1, using insoluble culture medium as experimental material, the operation steps are as follows: add an appropriate amount of cold water at natural temperature to the batching tank 1, add the above culture medium components, stir well, and after confirming that there is no lumps, open the opening and closing valve 18 and the high-temperature feed pump 16 of the raw material pipeline 2, and pump the culture medium into the sterilization system that has been sterilized with steam or ultra-high temperature hot water in advance and is in a high-temperature state, ensuring that the T2 temperature is 125-130°C, the steam and the feed liquid are directly mixed, and the liquid material is heated to the T3 temperature of about 140°C. Adjust the high-temperature feed pump 16 on the steam pipeline to control the flow rate, so that the liquid material flows through the heat exchanger 5 in 40-50 seconds, transfers the heat to the raw material by convection, and is cooled to the T4 temperature of about 40°C, and finally enters the fermentation tank 3 that has been sterilized in advance. During the whole process, the steam pressure is maintained at 0.35-0.4MPa. The steam flow rate entering the jet pump 9 and the pressure of the feed liquid are adjusted through the steam regulating valve and the variable frequency high-temperature booster pump to ensure that the incoming steam is completely compressed into ultra-high temperature hot water to release latent heat, so that the temperature of the hot clinker T3 is heated and stabilized at about 140°C.

[0065] The average measurement data of the above sterilization process are listed in Table 1.

[0066] Table 3

[0067]

[0068] Assuming that the heat loss of the equipment and the connecting pipes is 10% of the total heat energy, the consumption of sterilization steam can be calculated from the data listed in Table 3 by the following formula:

[0069]

[0070] In the formula, 4.3 kJ / (kg•℃) is the average specific heat of the liquid, and 2150 kJ / kg is the latent heat of vaporization released by steam (sensible heat is negligible). The steam consumption per 100 tons of liquid sterilization is 2.93 tons, which is about 75.6% less than the average steam consumption of 12 tons / 100 tons of conventional online ultra-high temperature continuous sterilization.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature sterilization system, characterized in that: include: A batching tank is used to mix raw materials and has a raw material outlet at the bottom; The heat exchanger and insulator has an insulation plate channel in the middle, and a raw material plate channel and a clinker plate channel are arranged in parallel on the outside; the raw material plate channel, the insulation plate channel and the clinker plate channel are all spiral plate structures; a raw material inlet is provided at the lower end of the raw material plate channel, and the raw material inlet is connected to the raw material outlet of the batching tank through a raw material pipeline; the upper end of the clinker plate channel is connected to the upper end of the insulation plate channel; Steam pipe, used to input high-temperature steam; High temperature feed pump, including a primary feed pump and a secondary booster pump, is used to transport materials or high temperature saturated hot water; A jet pump is connected to the steam pipe and the upper end of the channel between the raw material plates, and transports the heated sterilized clinker from the lower end inlet to the upper end outlet of the channel between the insulation plates through the sterile material pipe, and then transports it into the channel between the clinker plates; A distribution station, connected to the lower end of the channel between the clinker plates through a sterile material pipeline, and used to distribute the sterile material in the sterile material pipeline to the fermentation tank or the sterile material storage tank; A high-temperature saturated hot water tank, one end of which is connected to the sterile material pipeline between the distribution station and the lower end of the clinker plate channel, and the other end of which is connected to the raw material pipeline between the raw material outlet of the batching tank and the raw material inlet of the heat exchanger and warmer; When used for sterilization, the raw material enters the raw material plate channel of the heat exchanger and insulator from the batching tank, and is heated to the sterilization temperature by the latent heat released by the entering steam in the process of condensing into high-temperature saturated hot water with the help of a jet pump, enters the insulation plate channel of the heat exchanger and insulator from the bottom, and then enters the top of the clinker plate channel from the top of the insulation plate channel. The high-temperature sterilized material in the clinker plate channel exchanges heat with the raw material in the raw material plate channel, preheating the raw material entering the raw material plate channel from the batching tank, and the sterilized material after cooling enters the sterile material pipeline, and is then distributed to the target fermentation tank by the distribution station; When not in use, the steam pipeline is closed, the batching tank is closed and connected to the channel between the raw material plates, one end of the high-temperature saturated hot water tank is connected to the channel between the raw material plates of the heat exchanger and the heat insulator, and the high-temperature saturated hot water passes through the channel between the raw material plates, the jet pump, the channel between the insulation plates and the channel between the clinker plates in sequence, and finally flows back to the high-temperature saturated hot water tank to form a circulation loop; A transfer tank is also provided between the batching tank and the heat exchanger and insulator, and the transfer tank is used to transfer the raw material of at least one batching tank, and the transfer tank is connected to the raw material inlet of the raw material plate channel through a raw material pipeline to transport the raw material; The channels between the raw material plates and the channels between the cooked material plates are arranged in a double helix structure around the outside of the channels between the insulation plates.

2. The high temperature sterilization system according to claim 1, characterized in that: The channel between the insulation plates is a single spiral channel located in the middle of the heat exchanger and insulator.

3. The high temperature sterilization system according to claim 1, characterized in that: The high-temperature saturated hot water tank is provided with an exhaust pipe, and the exhaust pipe is provided with a safety valve and an exhaust valve.

4. The high temperature sterilization system according to claim 1, characterized in that: A high-temperature booster pump is also provided between the raw material plate channel and the jet pump.

5. The high temperature sterilization system according to claim 1, characterized in that: The batching tank or transfer tank is also provided with a soft water storage tank.

6. The high temperature sterilization system according to claim 1, characterized in that: A high-temperature switching valve is also provided on the raw material pipeline between the transfer tank and the high-temperature saturated water tank, which is used to switch the connection between the transfer tank or the high-temperature saturated hot water tank and the channel between the raw material plates.

7. The high temperature sterilization system according to claim 6, characterized in that: A high-temperature feed pump is also provided between the high-temperature switching valve and the channel between the raw material plates.

8. The high temperature sterilization system according to claim 1, characterized in that: The high temperature sterilization system also includes: A plurality of temperature and pressure measuring instruments are respectively arranged on the connecting pipes of each component and the high-temperature saturated hot water tank.

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