Ultra-high temperature sterilization process for particle-containing beverage
阅读说明:本技术 一种用于含颗粒饮料的超高温灭菌工艺 (Ultra-high temperature sterilization process for particle-containing beverage ) 是由 茅嘉惠 杨亚军 于 2019-09-20 设计创作,主要内容包括:本发明公开了一种用于含颗粒饮料的超高温灭菌工艺,包括以下步骤:(1)将颗粒平衡罐中的含颗粒饮料依次通过第一换热器和保温管升温至杀菌温度进行杀菌;(2)将杀菌后的含颗粒饮料依次通过第二换热器和冷却器降温至灌装温度;(3)将降至灌装温度的含颗粒饮料通过背压阀后回收或排放,并检测其浓度是否合格;(4)当回收或排放的含颗粒饮料浓度合格后,关闭背压阀,将降至灌装温度的含颗粒饮料通入颗粒背压罐中,向颗粒背压罐中持续补充无菌背压气,通过颗粒背压罐维持系统中的压力。本发明一种用于含颗粒饮料的超高温灭菌工艺,系统保持连续输出物料,使含颗粒饮料口味和质量稳定,产品能达到商业无菌的水平,有效的延长了产品的保质期。(The invention discloses an ultrahigh-temperature sterilization process for particle-containing beverage, which comprises the following steps: (1) heating the beverage containing particles in the particle balancing tank to a sterilization temperature through a first heat exchanger and a heat preservation pipe in sequence for sterilization; (2) cooling the sterilized beverage containing particles to the filling temperature through a second heat exchanger and a cooler in sequence; (3) recovering or discharging the beverage containing particles cooled to the filling temperature after passing through a back pressure valve, and detecting whether the concentration of the beverage is qualified or not; (4) and when the concentration of the recovered or discharged beverage containing particles is qualified, closing the backpressure valve, introducing the beverage containing particles which is cooled to the filling temperature into the particle backpressure tank, continuously supplementing sterile backpressure gas into the particle backpressure tank, and maintaining the pressure in the system through the particle backpressure tank. The ultrahigh-temperature sterilization process for the granular beverage, disclosed by the invention, has the advantages that the continuous material output is kept, the taste and the quality of the granular beverage are stable, the commercial sterile level of the product can be reached, and the quality guarantee period of the product is effectively prolonged.)
1. An ultra-high temperature sterilization process for a particle-containing beverage, characterized in that: the method comprises the following steps:
(1) heating the beverage containing particles in the particle balancing tank to a sterilization temperature through a first heat exchanger and a heat preservation pipe in sequence for sterilization;
(2) cooling the sterilized beverage containing particles to the filling temperature through a second heat exchanger and a cooler in sequence;
(3) recovering or discharging the beverage containing particles cooled to the filling temperature after passing through a back pressure valve, and detecting whether the concentration of the beverage is qualified or not;
(4) and when the concentration of the recovered or discharged beverage containing particles is qualified, closing the backpressure valve, introducing the beverage containing particles which is cooled to the filling temperature into the particle backpressure tank, continuously supplementing sterile backpressure gas into the particle backpressure tank, and maintaining the pressure in the system through the particle backpressure tank.
2. Ultra-high temperature sterilization process for beverage containing particles according to claim 1, characterized in that: before the step (1), introducing RO water into the particle balance tank, and enabling the RO water to flow back into the particle balance tank after sequentially passing through the first heat exchanger, the heat preservation pipe, the second heat exchanger, the cooler and the back pressure valve.
3. Ultra-high temperature sterilization process for beverage containing particles according to claim 2, characterized in that: before the step (1), introducing high-temperature steam into the particle backpressure tank, enabling the high-temperature steam to enter a feeding pipeline and a discharging pipeline which are communicated with the particle backpressure tank respectively, closing a discharging control valve between the backpressure valve and the feeding pipeline to cut off the RO water and the high-temperature steam, and discharging condensed water after sterilization is finished.
4. Ultra-high temperature sterilization process for beverage containing particles according to claim 1, characterized in that: in step (4), after closing the back pressure valve, CIP cleaning is performed on the first line for recovering or discharging the beverage containing particles.
5. Ultra-high temperature sterilization process for beverage containing particles according to claim 1, characterized in that: circulating a heat exchange medium through the first heat exchanger and the second heat exchanger and heating the heat exchange medium by steam prior to entering the first heat exchanger.
Technical Field
The invention relates to the technical field of beverage production, in particular to an ultrahigh-temperature sterilization process for particle-containing beverages.
Background
The beverage containing the granules has higher nutritive value and unique taste and flavor, is popular in the markets of China and southeast Asia, and is widely accepted by consumers in China. However, liquid UHT-like products have not been used for sterilization of particulate beverages at home and abroad for a while. The main reason is that the system needs pressurization when being heated, the integrity of the particles cannot be damaged when the system is pressurized, and the particles are extruded and damaged when a conventional pressurization back pressure valve is selected. Therefore, many customers can only select the autoclave to perform pressure cooking in a single batch with one pot, but the sterilization capability of the autoclave is low, the sterilization amount of each batch is limited, continuous supply cannot be realized, and the tank changing and feeding are needed in midway. Meanwhile, the central temperature of the heated pot does not reach the standard, so that the sterilization is not thorough, the surface of the pot wall is easy to scale and scorch, the cleaning is difficult, and the maintenance cost is high. Secondly, the customer needs to pass through manual operation when adjusting the product every time, and the operating efficiency is low and the maloperation risk is big.
The granular beverage currently on the market includes coconut milk beverage containing coconut, fruit juice containing strawberry granules, fruit juice containing yellow peach pulp, fruit juice containing aloe granules, grain beverage containing grain granules, and the like. The products are treated by a pasteurization machine with the sterilization temperature of 85 ℃, the sterilization temperature is low, pressurization and heating sterilization are not needed, although a plurality of pathogenic bacteria nutriments can be killed in the pasteurization process, the shelf life of the products can be influenced by some heat-resistant spores which can not be killed by pasteurization. In order to ensure that the product can be stored at ambient temperature for a longer period of time, higher temperature sterilization of the product is required, requiring an ever increasing internal pressure.
However, the internal structures of various conventional back pressure valves easily cause extrusion damage to particles in the feed liquid, the integrity of the particles is damaged, and the sensory loss of the final product is caused.
Disclosure of Invention
The invention aims to provide an ultrahigh-temperature sterilization process for particle-containing beverages, which is characterized in that a particle backpressure tank is arranged at an outlet, sterile backpressure gas is continuously supplemented into the particle backpressure tank, and the pressure in a system is maintained through the particle backpressure tank, so that the original sterilization temperature can be maintained in a high-temperature section; the system keeps continuous material output, so that the taste and the quality of the beverage containing the particles are stable, the physical, chemical and sensory changes of the product are reduced to the maximum extent, the product can reach the commercial sterile level, the product can be stored, transported and sold under the non-refrigeration condition, and the quality guarantee period of the product is effectively prolonged.
In order to achieve the purpose, the invention adopts the technical scheme that:
an ultra-high temperature sterilization process for a particle-containing beverage, comprising the steps of:
(1) heating the beverage containing particles in the particle balancing tank to a sterilization temperature through a first heat exchanger and a heat preservation pipe in sequence for sterilization;
(2) cooling the sterilized beverage containing particles to the filling temperature through a second heat exchanger and a cooler in sequence;
(3) recovering or discharging the beverage containing particles cooled to the filling temperature after passing through a back pressure valve, and detecting whether the concentration of the beverage is qualified or not;
(4) and when the concentration of the recovered or discharged beverage containing particles is qualified, closing the backpressure valve, introducing the beverage containing particles which is cooled to the filling temperature into the particle backpressure tank, continuously supplementing sterile backpressure gas into the particle backpressure tank, and maintaining the pressure in the system through the particle backpressure tank.
Preferably, before the step (1), the RO water is introduced into the particle balance tank, and then flows back to the particle balance tank after sequentially passing through the first heat exchanger, the heat preservation pipe, the second heat exchanger, the cooler and the back pressure valve.
More preferably, before the step (1), introducing high-temperature steam into the particle backpressure tank, enabling the high-temperature steam to enter a feeding pipeline and a discharging pipeline which are communicated with the particle backpressure tank respectively, closing a discharging control valve between the backpressure valve and the feeding pipeline to cut off the RO water and the high-temperature steam, and discharging condensed water after sterilization is finished.
Preferably, in step (4), the first line for recovering or discharging the beverage containing particles is subjected to CIP cleaning after closing the back pressure valve.
Preferably, a heat exchange medium is circulated through the first heat exchanger and the second heat exchanger, and the heat exchange medium before entering the first heat exchanger is heated by steam.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention relates to an ultrahigh temperature sterilization process for particle-containing beverages, which is characterized in that a particle backpressure tank is arranged at an outlet, sterile backpressure gas is continuously supplemented into the particle backpressure tank, and the pressure in a system is maintained through the particle backpressure tank, so that the original sterilization temperature can be maintained in a high temperature section; the system keeps continuous material output, so that the taste and the quality of the beverage containing the particles are stable, the physical, chemical and sensory changes of the product are reduced to the maximum extent, the product can reach the commercial sterile level, the product can be stored, transported and sold under the non-refrigeration condition, and the quality guarantee period of the product is effectively prolonged.
Drawings
FIG. 1 is a schematic structural diagram of an ultra-high temperature sterilization production line for granular beverage applying the process of the invention.
Wherein: 1. a feed stop valve; 2. a feed valve; 3. an evacuation valve; 4. a particle balancing tank; 5. a delivery pump; 6. a flow meter; 7. a first heat exchanger; 8. a sterilization temperature detector; 9. a steam proportion regulating valve; 10. a heat preservation pipe; 11. a hot water heat exchange system; 12. a second heat exchanger; 13. a cooler; 14. a back pressure valve; 15. a backflow stop valve; 16. a CIP liquid inlet valve; 17. a discharge control valve; 18. a steam trap; 19. a particle backpressure tank; 20. an SIP steam inlet valve; 21. a sterile back pressure gas inlet valve; 22. a backflow drain valve; 23. a feed line; 24. a discharge pipeline; 25. a first conduit.
A. The front adjusting tank contains granular beverage; B. refluxing CIP; C. feeding CIP liquid; D. a high temperature steam inlet; E. a sterile back pressure gas inlet; F. a product outlet; G. RO water enters; H. steam is fed; I. feeding cooling liquid; J. and (6) discharging the cooling liquid.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
The process is used for treating the material with the concentration less than or equal to 60 percent, namely the content of pulp particles in 100g of material is not more than 60g, and the material is prepared by mixing the pulp particles with the specification less than or equal to 5 multiplied by 5mm and the feed liquid according to the proportion.
In order to ensure that the temperature of a sterilization section can be raised to be above 100 ℃ for sterilization, specific pressure must be given to the inside of the system, the feed liquid can only raise the temperature to be 100 ℃ at most under normal pressure environment, partial heat-resistant microorganisms and spores cannot be completely killed, and the conventional UHT system realizes system pressurization to be above 2bar through various types of back pressure valves so as to effectively raise the temperature of the material to be 135 ℃ or even higher, and the ultrahigh temperature instant sterilization is carried out by keeping the sterilization time to be not less than 1s at the temperature.
Referring to FIG. 1:
first, the UHT system is SIP sterilized:
SIP heat treatment sterilization is carried out on all pipelines in contact with the materials, so that the materials processed in the later period are prevented from being infected with bacteria, and the interior of the UHT system can be sterilized by hot water or superheated water. Supplement the RO water to 4 granule balance tanks through the RO water pipeline, detect the flow through flowmeter 6, the 5 frequency of real-time feedback adjustment delivery pump, accurate control output flow. Then, the RO water enters the first heat exchanger 7, the temperature condition of the outlet RO water is detected in real time and the opening of the steam
The particle back
Second, UHT systems produce normally:
the material that the preceding transfer jar contains granule beverage and advances A transport empties the inside residual water of material pipeline through
Meanwhile, the CIP
In the
The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
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