阅读说明：本技术 果汁除菌方法 (Method for sterilizing fruit juice ) 是由 王振磊 杨文娟 刘军 于 2018-06-13 设计创作，主要内容包括：本发明提供一种果汁除菌方法,其包括对果汁进行预热处理、快速加热处理、保温处理和闪蒸冷却处理,其采用蒸汽发生器产生蒸汽与产品直接接触换热,并结合使用蒸汽引射泵对产品进行闪蒸冷处理,使得产品在较短时间达到除菌温度并在较短时间内得到冷却,可最大程度保证产品的色泽和风味；且产品在所述保温罐中进行除菌后,采用蒸汽引射泵对产品进行闪蒸冷却可避免经过除菌后的产品与外界的接触,保证产品不受污染；另外,采用蒸汽发生器产生蒸汽与产品直接接触换热避免了传统的间壁式加热方式带来的较大的压差,降低了设备需要的承压能力,降低了设备和生产成本。(The invention provides a fruit juice sterilization method, which comprises the steps of carrying out preheating treatment, rapid heating treatment, heat preservation treatment and flash evaporation cooling treatment on fruit juice, wherein a steam generator is adopted to generate steam to directly contact with a product for heat exchange, and a steam ejector pump is combined to carry out flash evaporation cooling treatment on the product, so that the product reaches sterilization temperature in a short time and is cooled in a short time, and the color and flavor of the product can be ensured to the maximum extent; after the product is sterilized in the heat-preserving tank, the product is subjected to flash evaporation cooling by adopting a steam injection pump, so that the sterilized product is prevented from contacting the outside, and the product is prevented from being polluted; in addition, the steam generator is adopted to generate steam to directly contact with the product for heat exchange, so that the larger pressure difference caused by the traditional dividing wall type heating mode is avoided, the pressure bearing capacity required by the equipment is reduced, and the equipment and the production cost are reduced.)

1. A fruit juice sterilization method, characterized by comprising the steps of:

the method comprises the following steps: preheating the fruit juice;

step two: mixing the preheated fruit juice obtained in the first step with hot steam to enable the fruit juice to reach the sterilization temperature quickly;

step three: performing heat preservation and sterilization treatment on the fruit juice obtained in the second step;

step four: and D, carrying out flash evaporation cooling treatment on the fruit juice obtained in the third step.

2. The method for sterilizing fruit juice according to claim 1, wherein the heating time in the second step is 2 s.

3. The method for sterilizing fruit juice according to claim 1, wherein the temperature-keeping time in the third step is 1-8 minutes.

4. The method for sterilizing fruit juice according to claim 1, wherein in the fourth step, the fruit juice obtained in the third step is subjected to flash evaporation cooling treatment by using a steam vacuum ejector pump.

Technical Field

The invention relates to a fruit juice production process, in particular to a fruit juice sterilization method.

Background

In the production process of jam and fruit juice products, the essential production process is to kill active enzymes and microorganisms in the products. The method of heating is used for killing microorganisms and active enzymes in the product and ensuring that the product is not rotten after being stored for a long time, and is defined as product sterilization or pasteurization.

In the conventional sterilization process, a dividing wall type heating and cooling method is generally adopted. The sterilization machine generally uses a sleeve type heater, a holding pipe and a cooler. The traditional sterilization process and the sterilization machine are adopted, the time from heating to final cooling needs 12-15 minutes, the color and the flavor of the product can be greatly changed due to long-time cooling, the heating time of the product cannot be controlled, the heating time is too long, the taste, the color and the flavor of the product can be influenced, even scorching can be caused, the heating time is too short, and the product cannot be sterilized thoroughly. In addition, because the resistance of each pipeline of the equipment is large due to the adoption of a sleeve type heater, a holding pipe and a cooler in the prior art, the high-viscosity product is conveyed, the pressure resistance of the equipment such as a pipe and a tank and the lift provided by a pump are higher in requirements, and the production general category of the product is limited to a certain extent.

Disclosure of Invention

The invention aims to provide a fruit juice sterilization method which has controllable heating time, can keep the original color and flavor of fruit juice and has low requirement on the pressure bearing capacity of equipment.

The invention provides a fruit juice sterilization method, which comprises the following steps:

the method comprises the following steps: preheating the fruit juice;

step two: mixing the preheated fruit juice obtained in the first step with hot steam to enable the fruit juice to reach the sterilization temperature quickly;

step three: performing heat preservation and sterilization treatment on the fruit juice obtained in the second step;

step four: and D, carrying out flash evaporation cooling treatment on the fruit juice obtained in the third step.

Preferably, the heating time in the second step is 2 s.

Preferably, the heat preservation time in the third step is 1-8 minutes.

Preferably, in the fourth step, the juice obtained in the third step is subjected to flash evaporation cooling treatment by using a steam vacuum ejector pump.

The invention provides a fruit juice sterilization method which is implemented by a fruit juice sterilization device, wherein the fruit juice sterilization device comprises a heating tank, a liquid inlet of the heating tank is arranged at the bottom of the heating tank, a liquid outlet of the heating tank is arranged at the top of the heating tank, and a steam inlet is arranged in the middle of the heating tank. The fruit juice degerming device also comprises a preheater, a steam generator, a heat preservation tank, a flash evaporator and a steam injection vacuum pump. The pre-heater includes a pre-heater inlet and a pre-heater liquid outlet, the pre-heater liquid outlet through a fifth pipeline with the heating jar inlet is connected. The top of the steam generator is provided with a steam outlet, and the steam outlet is connected with the steam inlet of the heating tank through a first pipeline. The bottom of the heat-preserving tank is provided with a heat-preserving tank inlet, the top of the heat-preserving tank is provided with a heat-preserving tank liquid outlet, and the heat-preserving tank inlet is connected with the heating tank liquid outlet through a second pipeline. The flash evaporator top is provided with a flash steam export, and its bottom is provided with a flash evaporator inlet and a flash evaporator liquid outlet, the flash evaporator inlet through a third pipeline with the holding vessel liquid outlet is connected. The steam injection vacuum pump comprises a steam injection inlet, and the steam injection inlet is connected with the flash steam outlet through a fourth pipeline.

And one side of the flash evaporator is provided with a pressure gauge for monitoring the pressure change in the flash evaporator and adjusting the temperature of the flash evaporator during flash evaporation cooling by adjusting the pressure change in the flash evaporator.

According to the fruit juice sterilization method provided by the invention, in the second step, steam generated by a steam generator is directly contacted with a product for heat exchange, and a steam ejector pump is used for carrying out flash evaporation cold treatment on the product in combination with the fourth step, so that the product reaches sterilization temperature in a short time and is cooled in a short time, and the color and flavor of the product can be ensured to the maximum extent; the product is subjected to flash evaporation cooling by adopting a steam injection pump, so that the sterilized product is prevented from contacting the outside, and the product is prevented from being polluted; in addition, step four adopts steam generator to produce steam and product direct contact heat transfer avoided the great pressure differential that traditional dividing wall formula heating method brought, has reduced the pressure-bearing capacity that equipment needs, has reduced manufacturing cost.

Drawings

FIG. 1 is a flow chart of a method of a juice sterilization apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a juice sterilization apparatus according to a first embodiment of the present invention.

Detailed Description

The embodiments described below are only a part of the embodiments of the present invention, and not all of them. 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 and 2, the present embodiment provides a fruit juice sterilizing method, which includes the following steps:

the method comprises the following steps: preheating the fruit juice;

step two: mixing the preheated fruit juice obtained in the first step with hot steam to enable the fruit juice to reach the sterilization temperature quickly;

step three: performing heat preservation and sterilization treatment on the fruit juice obtained in the second step;

step four: and D, carrying out flash evaporation cooling treatment on the fruit juice obtained in the third step.

In this embodiment, the heating time in the second step is 2 s; the heat preservation time in the third step is 1-8 minutes; and step four, carrying out flash evaporation cooling treatment on the fruit juice obtained in the step three by adopting a steam vacuum ejector pump 5.

The embodiment provides a fruit juice degerming method, which is implemented by a fruit juice degerming device, and comprises a preheater 8, a heating tank 1, a steam generator 2, an insulation tank 3, a flash evaporator 4 and a steam injection vacuum pump 5. The bottom of the heating tank 1 is provided with a heating tank liquid inlet 11, the top is provided with a heating tank liquid outlet 12, and the middle part is provided with a steam inlet 13. The preheater 8 comprises a preheater liquid inlet 81 and a preheater liquid outlet 82, and the preheater liquid outlet 82 is connected with the heating tank liquid inlet 11 through a fifth pipeline 75. The top of the steam generator 2 is provided with a steam outlet 21, and the steam outlet 21 is connected with the steam inlet 13 of the heating tank 1 through a first pipeline 71. The bottom of the heat-preserving tank 3 is provided with a heat-preserving tank inlet 31, the top of the heat-preserving tank is provided with a heat-preserving tank outlet 32, and the heat-preserving tank inlet 31 is connected with the heating tank outlet 12 through a second pipeline 72. The top of the flash evaporator 4 is provided with a flash evaporation steam outlet 42, the bottom of the flash evaporator is provided with a flash evaporator liquid inlet 43 and a flash evaporator liquid outlet 41, and the flash evaporator liquid inlet 43 is connected with the heat preservation tank liquid outlet 32 through a third pipeline 73. The steam injection vacuum pump 5 comprises a steam injection inlet 51, and the steam injection inlet 51 is connected with the flash steam outlet 42 through a fourth pipeline 74.

A pressure gauge 44 is arranged on one side of the flash evaporator 4 and used for monitoring the pressure change in the flash evaporator 4, and the temperature of the flash evaporator 4 during flash evaporation cooling can be adjusted by adjusting the pressure change in the flash evaporator 4.

According to the fruit juice sterilization method provided by the embodiment, in the second step, steam generated by the steam generator 2 is directly contacted with a product for heat exchange, and in combination with the fourth step, the steam ejector pump 5 is used for carrying out flash evaporation cold treatment on the product, so that the product reaches sterilization temperature in a short time and is cooled in a short time, and the color and flavor of the product can be ensured to the greatest extent; after the product is sterilized in the heat-preserving tank 3, the product is subjected to flash evaporation cooling by adopting the steam ejector pump 5 in the fourth step, so that the sterilized product is prevented from contacting the outside, and the product is prevented from being polluted; in addition, in the first step, the steam generator 2 is adopted to generate steam to directly contact with the product for heat exchange, so that a large pressure difference caused by a traditional dividing wall type heating mode is avoided, the pressure bearing capacity required by equipment is reduced, and the production cost is reduced.

The above disclosure is only one preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.