CN112245604A - Ultrahigh-temperature saturated hot water circulation instant continuous sterilization system - Google Patents
Ultrahigh-temperature saturated hot water circulation instant continuous sterilization system Download PDFInfo
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- CN112245604A CN112245604A CN202011241850.2A CN202011241850A CN112245604A CN 112245604 A CN112245604 A CN 112245604A CN 202011241850 A CN202011241850 A CN 202011241850A CN 112245604 A CN112245604 A CN 112245604A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/04—Heat
- A61L2/06—Hot gas
- A61L2/07—Steam
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
- A23L5/21—Removal of unwanted matter, e.g. deodorisation or detoxification by heating without chemical treatment, e.g. steam treatment, cooking
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
Abstract
The invention discloses an ultrahigh-temperature saturated hot water circulating instant continuous sterilization system which comprises a proportioning tank, a saturated hot water tank, a high-temperature water pump, an injection pump, a material pumping pump, a booster pump, a heating heat exchanger, a waste heat recovery heat exchanger, a heat preservation maintainer, an aseptic material receiving tank, a steam pipeline, a material pipeline, a saturated hot water pipeline and corresponding valves, wherein the steam pipeline, the material pipeline, the saturated hot water pipeline and the corresponding valves are connected with the aseptic material receiving tank; the ultrahigh-temperature saturated hot water circulating instant continuous sterilization system has the three remarkable beneficial effects of saving energy, improving sterilization quality, prolonging service life of equipment and the like. And the top water amount after sterilization is well controlled, so that the zero discharge of waste water, waste gas and waste residue can be realized in normal use besides the cleaning before the equipment is used.
Description
Technical Field
The invention belongs to the technical field of sterilization systems, and particularly relates to an ultrahigh-temperature saturated hot water circulating instant continuous sterilization system.
Background
As is well known, because of water and air pollution, the problem of overproof of food microorganisms in China is very serious, and the production process in the pharmaceutical and biological industries is also often polluted by microorganisms, so that the finished products, raw materials, auxiliary materials, semi-finished products and the like in the production process are urgently needed to be disinfected and sterilized. Currently, the most widely used sterilization methods include radiation sterilization, chemical sterilization, dry heat sterilization and high-pressure steam moist heat sterilization, wherein the radiation sterilization has a very limited application range due to variation of the chemical substances to be sterilized, the chemical sterilization may cause residue of the chemical sterilization agent to be severely limited, and the dry heat sterilization is not suitable for liquid materials, so the most widely used sterilization method is the moist heat sterilization with high-pressure steam. The traditional high-pressure steam sterilization method at 121 ℃, 30 minutes or 20 minutes is long in time consumption, complex in operation and serious in nutrient substance damage. The food industry commonly uses ultra-high temperature instant sterilization method, so-called UHT, which can reach sterilization index within 140 ℃ and 30 seconds.
Although the nutrient substances of the whole material are rarely damaged in the sterilization process, the quality of food processing is still influenced by local overheating and coking caused by high-temperature steam. Moreover, the steam consumption of the sterilization process is high, and the low-price coal boiler steam is replaced by high-price natural gas boiler steam or higher-price electric boiler steam, so that the sterilization cost is greatly increased. In addition, the equipment is easy to scale and block after long-term use, is not easy to clean and influences the service life of the equipment, and therefore the ultrahigh-temperature saturated hot water circulating instant continuous sterilization system is provided.
Disclosure of Invention
The invention aims to provide an ultrahigh-temperature saturated hot water circulating instant continuous sterilization system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an ultrahigh-temperature saturated hot water circulating instant continuous sterilization system comprises a proportioning tank, a saturated hot water tank, a high-temperature water pump, an injection pump, a feeding pump, a booster pump, a heating heat exchanger, a waste heat recovery heat exchanger, a heat preservation maintainer, an aseptic material receiving tank, a steam pipeline, a material pipeline, a saturated hot water pipeline and corresponding valves for connecting the proportioning tank, the feeding pump, a cold material channel of the waste heat recovery heat exchanger, the booster pump, a material channel of the heating heat exchanger, the heat preservation maintainer and a hot material channel of the waste heat recovery heat exchanger, wherein the circulating system which can circularly clean and pre-sterilize the pipelines and the valves by the ultrahigh-temperature saturated hot water is formed by connecting the corresponding pipelines and valves, and the circulating system which is used for preparing the ultrahigh-temperature saturated hot water and heating feed liquid is formed by the saturated hot water tank, the hot water pump, the injection pump, the saturated hot water channel, the continuous material sterilizing system comprises a batching tank, a material beating pump, a cold material channel of a waste heat recovery heat exchanger, a booster pump, a material channel of a heating heat exchanger, a heat preservation maintainer, a hot material channel of the waste heat recovery heat exchanger, a sterile material receiving tank, corresponding pipelines and valves.
Preferably, the dispensing tank is a conventional, non-heated, pressurized container of metallic or non-metallic material, using stainless steel, 316L stainless steel for food grade materials and stable non-metallic materials for corrosive materials.
Preferably, the sterile material receiving tank and the saturated hot water tank are pressure vessels made of 316L stainless steel, the requirement on the pressure resistance degree is determined by the corresponding sterilization temperature, and the pressure resistance of sterilization at 140 ℃ is more than 0.3 MPa.
Preferably, the material beating pump and the booster pump are sanitary centrifugal pumps, rotor pumps or gear pumps and can resist the high temperature of more than 150 ℃.
Preferably, the hot water pump is a sanitary centrifugal pump, a rotor pump or a gear pump, and can resist the high temperature of more than 150 ℃.
Preferably, the jet pump is a high-pressure hydraulic jet pump made of 316L stainless steel, the requirement of the pressure resistance degree is determined by the corresponding sterilization temperature, and the pressure resistance is more than 0.5MPa for sterilization at 140 ℃.
Preferably, the heating heat exchanger and the waste heat recovery heat exchanger are heat exchangers which are made of 316L stainless steel and have consistent flow channels at two sides, small flow resistance and no material storage dead angle.
Preferably, the heat preservation retainer is a pipeline type or spiral plate type heat preservation retainer made of 316L stainless steel.
Preferably, the valve comprises a three-way valve, a stop valve, a drain valve or a ball valve, and the pipeline and the valve are made of 316L stainless steel which can resist the sterilization temperature and pressure and has small flow resistance.
Compared with the prior art, the invention has the beneficial effects that:
1. steam is condensed into supersaturated water after being compressed by high-pressure isothermal heat insulation of softened water in the jet pump, latent heat is completely released, the jet water is rapidly heated to form ultrahigh-temperature saturated hot water, and the ultrahigh-temperature saturated hot water is recycled, so that no heat energy is wasted except a small amount of heat dissipation loss.
2. The heat exchange temperature difference between the ultrahigh-temperature saturated hot water and the sterilized material is only about 10 ℃, and compared with the heating temperature difference of dozens of degrees when steam is heated, the heat exchange temperature difference is not easy to cause local overheating, coking and scaling, thereby improving the material sterilization quality and prolonging the service life of equipment.
3. The waste heat recovery heat exchanger is used for almost completely recovering the waste heat of the sterilized high-temperature material, so that the material to be sterilized can be preheated to about 10 ℃ different from the sterilization temperature, and the use amount of heating steam is greatly saved. For example, the material is heated and sterilized at the initial temperature of 20 ℃ and the original heating temperature difference is 120 ℃, the prior waste heat preheating can reach 130 ℃, the heating temperature difference is only 10 ℃, and the energy saving rate can reach more than 90%.
In conclusion, the ultrahigh-temperature saturated hot water circulating instant continuous sterilization system has the three remarkable beneficial effects of saving energy, improving sterilization quality, prolonging service life of equipment and the like. And the top water amount after sterilization is well controlled, so that the zero discharge of waste water, waste gas (steam) and waste residue can be realized in normal use besides the cleaning before the equipment is used.
Drawings
FIG. 1 is a schematic flow diagram of a sterilization system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: an ultrahigh-temperature saturated hot water circulating instant continuous sterilization system comprises a proportioning tank, a saturated hot water tank, a high-temperature water pump, an injection pump, a feeding pump, a booster pump, a heating heat exchanger, a waste heat recovery heat exchanger, a heat preservation maintainer, an aseptic material receiving tank, a steam pipeline, a material pipeline, a saturated hot water pipeline and corresponding valves for connecting the proportioning tank, the feeding pump, a cold material channel of the waste heat recovery heat exchanger, the booster pump, a material channel of the heating heat exchanger, the heat preservation maintainer and a hot material channel of the waste heat recovery heat exchanger, wherein the circulating system which can circularly clean and pre-sterilize the pipelines and the valves by the ultrahigh-temperature saturated hot water is formed by connecting the corresponding pipelines and valves, and the circulating system which is used for preparing the ultrahigh-temperature saturated hot water and heating feed liquid is formed by the saturated hot water tank, the hot water pump, the injection pump, the saturated hot water channel, the continuous material sterilizing system comprises a batching tank, a material beating pump, a cold material channel of a waste heat recovery heat exchanger, a booster pump, a material channel of a heating heat exchanger, a heat preservation maintainer, a hot material channel of the waste heat recovery heat exchanger, a sterile material receiving tank, corresponding pipelines and valves.
Further, the dispensing tank is a common container of metal or non-metal material without heating and pressurizing, and is made of stainless steel material, 316L stainless steel for food grade materials and stable non-metal material for corrosive materials.
Furthermore, the sterile material receiving tank and the saturated hot water tank are pressure vessels made of 316L stainless steel, the requirement on the pressure resistance degree is determined by the corresponding sterilization temperature, and the pressure resistance of 0.3MPa is required for sterilization at 140 ℃.
Further, the knockout pump and the booster pump are sanitary centrifugal pumps, rotor pumps or gear pumps and are required to withstand a high temperature of 150 ℃.
Further, the hot water pump is a sanitary centrifugal pump, a rotor pump or a gear pump, and is required to withstand a high temperature of 150 ℃.
Furthermore, the jet pump is a high-pressure hydraulic jet pump made of 316L stainless steel, the requirement on the pressure resistance degree is determined by the corresponding sterilization temperature, and the pressure resistance of 0.5MPa is required for sterilization at 140 ℃.
Furthermore, the heating heat exchanger and the waste heat recovery heat exchanger are spiral plate type heat exchangers which are made of 316L stainless steel and have consistent flow channels at two sides, small flow resistance and no material storage dead angle.
Further, the heat preservation maintainer is a pipeline type heat preservation maintainer made of 316L stainless steel.
Furthermore, the valve comprises a three-way valve, a stop valve, a drain valve or a ball valve, and the pipeline and the valve are made of 316L stainless steel which can resist the sterilization temperature and pressure and has small flow resistance.
The mixing tank is used for mixing materials to be sterilized; the saturated hot water tank is used for storing softened water and high-temperature saturated hot water prepared by the softened water; the hot water pump is used for pressurizing softened water so that the softened water can reach a higher spraying speed after entering the spraying pump; the injection pump is used for carrying out isothermal adiabatic compression on the entering steam to condense the steam into high-temperature saturated water, and simultaneously heating softened water through released latent heat; the heating heat exchanger is used for indirectly heating the material to be sterilized or the purified water; the waste heat recovery heat exchanger is used for recovering waste heat of the sterilized high-temperature material to preheat the cold material and simultaneously cooling the sterilized high-temperature material; the heat preservation maintaining device is used for preserving heat of the material to be sterilized at the sterilization temperature for the required time; the material pump is used for pumping the material to be sterilized into a cooling channel of the waste heat recovery heat exchanger; the booster pump is used for pumping the preheated material to be sterilized into the material channel of the heating heat exchanger for heating and then entering the heat material channel of the heat preservation maintainer and the waste heat recovery heat exchanger; and the sterile material receiving tank is used for receiving the sterile material which is cooled and discharged from the heat material channel of the waste heat recovery heat exchanger. The equipment is connected by stainless steel, particularly 316L pipelines, which resists sterilization temperature and pressure to form two subsystems of high-temperature saturated softened water circulation heating and high-temperature saturated purified water circulation equipment cleaning and pre-sterilization, and the system after cleaning and sterilization can be used for high-temperature continuous sterilization of materials. In order to convert the cleaning and pre-sterilization into high-temperature continuous sterilization, switching valves are arranged on pipelines between the dosing tank and the sterile material receiving tank to the material pumping pump and on a sterile material discharging pipeline of the waste heat recovery heat exchanger, and the switching valves can be conveniently switched between the cleaning, pre-sterilization and high-temperature continuous sterilization.
The working principle and the using process of the invention are as follows:
cleaning: firstly, filling tap water into a batching tank, transferring a switching valve below the batching tank and an aseptic material receiving tank to a material beating pump communicated with the batching tank and isolated from the aseptic material receiving tank, transferring the switching valve below a waste heat recovery heat exchanger to a material heating channel of the heat recovery heat exchanger communicated with the aseptic material receiving tank and isolated from sewage discharge, and starting the material beating pump and a booster pump in sequence to enable the tap water to enter the aseptic material receiving tank from the batching tank through the material beating pump, the cold material channel of the waste heat recovery heat exchanger, the booster pump, the material channel of the heating heat exchanger, a heat preservation maintainer and the hot material channel of the waste heat recovery heat exchanger. And after the equipment and the pipeline are confirmed to be cleaned, opening a drain valve below the batching tank, and turning a switching valve below the waste heat recovery heat exchanger to drain, so that water in the system is emptied. Then, softened water is injected into the batching tank, and the operation is carried out in the same way until the water storage in the system is emptied. And then, injecting purified water into the batching tank, and operating in the same way until the water stored in the system is emptied. And repeating the purified water cleaning operation for multiple times until the cleanliness of the equipment and the pipeline required by the process is confirmed. This cleaning process is necessary for new equipment that has not yet been used, and the equipment after use does not need to be run for each batch if it is to be kept perfectly clean and intact.
Pre-sterilization of equipment and pipelines: injecting enough softened water filled with a saturated hot water system pipeline and equipment into a saturated hot water tank, injecting enough purified water filled with the material system pipeline and the equipment into an aseptic material receiving tank, transferring a switching valve below a batching tank and the aseptic material receiving tank to a material pumping pump to be communicated with the aseptic material receiving tank and to be isolated from the batching tank, transferring a switching valve below a waste heat recovery heat exchanger to a heat material channel of the heat recovery heat exchanger to be communicated with the aseptic material receiving tank and to be isolated from sewage discharge, firstly starting a hot water pump, after the pump runs stably, starting a steam valve of a jet pump, and performing circulating flow of the saturated hot water tank, the hot water pump, the jet pump, the saturated hot water channel of the heating heat exchanger and the saturated hot water tank by using latent heat of steam sucked by the jet pump and condensed and released in the circulating process until the temperature is stabilized to a required temperature. Then the material-beating pump and the booster pump are started in sequence, and the purified water in the sterile material receiving tank circularly flows through the material-beating pump, the cold material channel of the waste heat recovery heat exchanger, the booster pump, the material liquid channel of the heating heat exchanger, the heat preservation maintainer, the hot material channel of the waste heat recovery heat exchanger and the sterile material receiving tank, and is heated in the heating heat exchanger until the temperature is stabilized at the temperature required by pre-sterilization. The purified water in the system continuously and circularly flows for a certain time (determined by the pre-sterilization temperature, see table 1) at the required pre-sterilization temperature, and the pre-sterilization purpose of equipment and pipelines can be achieved.
Material sterilization: during the pre-sterilization of the equipment and the pipeline, the materials to be sterilized are prepared in the material preparing tank. After the pre-sterilization of the equipment and the pipeline reaches enough sterilization time, the switching valve below the waste heat recovery heat exchanger is switched to discharge sewage, so that the water in the sterile material receiving tank and the system is basically emptied (the discharged purified water can be received by a clean container and is used for the pre-sterilization of the equipment and the pipeline in the next sterilization period), then, under the condition of not stopping the pump, the switching valve below the batching tank and the sterile material receiving tank is quickly switched to the material beating pump to be communicated with the batching tank and separated from the sterile material receiving tank, and the material in the batching tank reaches the stable preheating-sterilization-cooling temperature of the process requirement, and is continuously injected into the sterile material receiving tank through the material beating pump, the waste heat recovery heat exchanger cold material channel, the booster pump, the heating heat exchanger material liquid channel, the heat preservation maintaining device and the waste heat recovery heat exchanger hot material channel until the material liquid in the batching tank is beaten up.
And (3) top water sterilization: when the material liquid in the material mixing tank is nearly completely mixed, purified water with the mixing amount of 1/20-1/10 is injected into the material mixing tank, residual materials in system equipment and pipelines are top-washed to the sterile material receiving tank until the material liquid entering the sterile material receiving tank becomes clear water, the booster pump, the material mixing pump and the hot water pump are sequentially shut down, and the whole sterilization process is finished. The water stored in the system is kept in the system after sterilization, the contamination by the mixed bacteria is avoided by a sterile pressure maintaining method, and only the water recovered by the emptying valve below the self-preheating recovery heat exchanger in the step 3 is added in the equipment and pipeline pre-sterilization stage of the next sterilization period.
Pre-sterilization and temperature control of the sterilization process: the key control parameter of the pre-sterilization and sterilization process is the temperature of the feed liquid (or purified water) at the inlet or outlet of the heat preservation maintainer, which is called as the sterilization temperature of the feed liquid (or purified water), and the key control parameter can be controlled by adjusting the hot water temperature of the saturated hot water tank, generally speaking, the hot water temperature of the saturated hot water tank should be about 10 ℃ higher than the sterilization temperature of the feed liquid (or softened water). The sterilization time is determined by the size of the channel in the heat preservation maintainer and depends on the sterilization temperature, and the table 1 shows the corresponding relation between the sterilization temperature and the sterilization time under the ultrahigh temperature sterilization condition for reference.
TABLE 1 ultra-high temperature sterilization temperature and sterilization time corresponding table
Note: f0The ultra-high temperature sterilization temperature and the sterilization time correspond to the sterilization time (minutes) of 121 DEG C
The hot water temperature of the saturated hot water tank can be regulated and controlled by two methods, one is to regulate the opening degree of a steam valve of the jet pump, and can be implemented by adopting a pneumatic or electric regulating valve; the other method is implemented by fixing the opening degree of a steam valve of the jet pump and controlling the rotating speed of the hot water pump by adopting frequency conversion. Both of these methods require the steam pressure entering the jet pump to be maintained constant, so a steam surge valve is added before the steam valve.
The detection data listed in tables 2 and 3 are obtained by using an ultrahigh-temperature saturated hot water circulating instant continuous sterilization system with a rated sterilization treatment capacity of 20t/h according to the operating steps of material sterilization, top water sterilization, pre-sterilization and temperature control in the sterilization process.
TABLE 2 detection data of pre-sterilization of equipment pipes
TABLE 3 materials Sterilization test record data
Note: the cooling temperature difference is larger than the preheating temperature difference, which is caused by the fact that the mechanical energy of the pump in the material beating operation is converted into heat energy.
As can be seen from tables 2 and 3, the steam consumption for pre-sterilization of the equipment and pipes is 1.6% of the flow rate of the knockout water, while the steam consumption for sterilization of the feed liquid is 3.1% of the flow rate of the knockout water. In a total of 90 minutes and 28 tons of beating process, the total steam consumption is 1.19 tons, wherein the steam consumption for feed liquid sterilization is 0.86 tons, and the steam consumption for equipment and pipeline pre-sterilization is 0.33 tons.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. An ultrahigh-temperature saturated hot water circulating instant continuous sterilization system is characterized by comprising a proportioning tank, a saturated hot water tank, a high-temperature water pump, an injection pump, a material pumping pump, a booster pump, a heating heat exchanger, a waste heat recovery heat exchanger, a heat preservation maintainer, an aseptic material receiving tank, a steam pipeline, a material pipeline, a saturated hot water pipeline and corresponding valves for connecting the proportioning tank, the material pumping pump, the cold material channel of the waste heat recovery heat exchanger, the booster pump, the material channel of the heating heat exchanger, the heat preservation maintainer and the hot material channel of the waste heat recovery heat exchanger, wherein the circulating system for performing ultrahigh-temperature saturated hot water circulating cleaning and pre-sterilization on the pipelines and the valves is formed by connecting the corresponding pipelines and valves, and the circulating system for preparing the ultrahigh-temperature saturated hot water and heating the feed liquid is formed by the saturated hot water tank, the hot water pump, the injection pump, the saturated hot water channel of the, the continuous material sterilizing system comprises a batching tank, a material beating pump, a cold material channel of a waste heat recovery heat exchanger, a booster pump, a material channel of a heating heat exchanger, a heat preservation maintainer, a hot material channel of the waste heat recovery heat exchanger, a sterile material receiving tank, corresponding pipelines and valves.
2. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the batching jar is ordinary need not heating, pressurized metal or non-metallic material container, uses stainless steel material, to food grade material, uses 316L stainless steel, to corrosive materials, uses stable non-metallic material.
3. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the sterile material receiving tank and the saturated hot water tank are pressure vessels made of 316L stainless steel, the requirement on the pressure resistance degree is determined by the corresponding sterilization temperature, and the pressure resistance is more than 0.3MPa for sterilization at 140 ℃.
4. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the material-beating pump and the booster pump are sanitary centrifugal pumps, rotor pumps or gear pumps and can resist the high temperature of more than 150 ℃.
5. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the hot water pump is a sanitary centrifugal pump, a rotor pump or a gear pump and can resist the high temperature of more than 150 ℃.
6. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the jet pump is a high-pressure hydraulic jet pump made of 316L stainless steel, the requirement on the pressure resistance degree is determined by the corresponding sterilization temperature, and the pressure resistance required for sterilization at 140 ℃ is more than 0.5 MPa.
7. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the heating heat exchanger and the waste heat recovery heat exchanger are heat exchangers which are made of 316L stainless steel and have consistent runners at two sides, small flow resistance and no material storage dead angle.
8. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the heat preservation maintainer is a pipeline type or spiral plate type heat preservation maintainer made of 316L stainless steel.
9. The ultrahigh-temperature saturated hot water circulating instantaneous continuous sterilization system according to claim 1, characterized in that: the valve comprises a three-way valve, a stop valve, a drain valve or a ball valve, and the pipeline and the valve are made of 316L stainless steel which can resist the sterilization temperature and pressure and has small flow resistance.
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| CN113115887A (en) * | 2021-05-21 | 2021-07-16 | 昂磐智能装备(山东)有限公司 | Energy-saving sterilization unit and use method |
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