CN113306770A

CN113306770A - Zero-oxygen air replacement process and device for packaging, storing and processing solid food

Info

Publication number: CN113306770A
Application number: CN202110391557.2A
Authority: CN
Inventors: 张建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-08-27
Anticipated expiration: 2041-04-12
Also published as: CN113306770B

Abstract

The invention discloses a zero-oxygen air replacement process and a zero-oxygen air replacement device for packaging, storing and processing solid food, which complete the filling and sealing processes of materials under the zero-oxygen condition (the zero-oxygen filling chamber A and the packaging bag are both in the zero-oxygen or low-oxygen state), so that the packaging bag reaches the zero-oxygen or low-oxygen state after being filled and sealed. The invention also discloses a complete set of devices such as a Bn combination (or a Cn combination) of the air total replacement device and the like and a corresponding process flow application, and the complete set of devices pretreats the solid food so as to gradually reduce the oxygen content of the air among the solid food particles entering the zero-oxygen filling chamber A to a zero-oxygen or low-oxygen state in stages. After pretreatment or zero-oxygen filling, the solid food is in a zero-oxygen or low-oxygen state no matter in a storage tank or a packaging bag, and the freshness and the taste are still kept under the condition of no preservatives, antioxidants and other chemical additives.

Description

Zero-oxygen air replacement process and device for packaging, storing and processing solid food

Technical Field

The invention discloses a zero-oxygen air replacement process for packaging, storing and processing solid food, and particularly discloses a zero-oxygen filling chamber A, an air full replacement device Bn combination and a fuzzy interface air replacement device Cn combination and a system which are matched with the zero-oxygen air replacement process.

Background

The filling process of the existing solid food is implemented in an aerobic environment, the oxygen content between powder and particles of the food raw materials to be filled is high, and the oxygen concentration in the air in a packaging bag is high after filling and sealing. Although the packaging is also carried out by adopting an anoxic preservation method such as vacuumizing and filling inert gas, the oxygen in the package or container cannot be completely removed, and the food materials and the food can not be kept in a fresh state in the storage and shelf period. Chemical additives such as preservatives and antioxidants are only added.

1. The traditional technology has the following defects:

1) taking 500g of the product to be independently packaged (such as solid food like walnut kernel particles, powder and slices), the iron oxidant packet is filled before bagging and sealing by the traditional process, so that the quality of the product in shelf life can be improved. However, if the food cannot be eaten one time after being unpacked, the taste and flavor of the food can be influenced in a short time after being moistened, and the food can deteriorate after being moistened for a long time.

2) Taking high-fat and high-protein food such as nut bags, meal replacement powder and the like which are independently packaged by about 50g, 500g, 5kg or more as an example, the small package and the large package are not suitable for being packaged in small iron-oxidizing agent packages, and only preservatives and antioxidants are selected to be added.

3) The traditional method of vacuumizing and filling nitrogen can not completely remove the oxygen-containing air in the bag, and the powder or particles in the package still contain higher-concentration oxygen. Resulting in a constant decline in quality and mouthfeel of the food product in the bag over time, with some brands of nut bags even calling for complaints and recalls hundreds of times per year.

2. Compared with the background technology, the invention has the following advantages:

the air full replacement process, the zero-oxygen packaging device and the zero-oxygen storage device are configured, so that the solid food can be in a zero-oxygen state in the whole process from raw materials and semi-finished products to small finished product packages or large finished product packages; the technical advantages are obvious:

1) the food materials and the food can still keep fresh without adding preservatives, antioxidants and other chemical preservatives.

2) Establishes new industry standards and national standards of food and medicine equipment and food and medicine products under the support of the zero oxygen engineering technology,

disclosure of Invention

The invention aims to provide an air full-replacement process and device for packaging, storing and processing solid food.

It is characterized in that the material filling and sealing process is completed under the zero oxygen condition. During filling, the bag mouth of the packaging bag, the filling mouth of the filling machine and the metering and feeding unit are required to be arranged in the chamber of the zero-oxygen filling chamber A (the filling chamber A is in a zero-oxygen or low-oxygen state).

The method is characterized in that if the filling opening of the filling machine and the bag opening of the packaging bag are positioned outside the zero-oxygen filling chamber A during filling, oxygen-containing air in the packaging bag is removed before filling, and the bag opening of the packaging bag and the filling opening of the filling machine are connected and opened in an externally sealed state and then are filled.

The filling chamber is further characterized in that when a piston type scraper Ag arranged in the zero-oxygen filling chamber is pushed, air inlet and exhaust gases are not fused with each other, air full replacement can be implemented, and the interior of the filling chamber A can be rapidly enabled to reach a zero-oxygen or low-oxygen state. And the chamber of the zero-oxygen filling chamber A is kept in an inert gas positive pressure state.

The invention also aims to provide an air total displacement device Bn combination, a fuzzy interface air displacement device Cn combination and a zero oxygen storage tank D for the solid food oxygen-expelling process. The Bn combination, the Cn combination and the zero-oxygen storage tank D are respectively provided with piston type scrapers Bg, Cg and Dg, so that full air replacement can be implemented, and the interior of the filling chamber A can be quickly brought into a zero-oxygen or low-oxygen state.

The method is characterized in that when materials are combined by an air total displacement device Bn filled with inert gas, the oxygen concentration among the material particles is gradually reduced, and finally the oxygen concentration reaches a zero-oxygen or low-oxygen state.

The method is characterized in that when the inert gas passes through the fuzzy interface air replacement device Cn filled with the materials, the oxygen concentration among the material particles is gradually reduced and finally reaches a zero-oxygen or low-oxygen state.

The method is further characterized in that the materials processed by the zero-oxygen filling chamber A, the air full displacement device Bn combination (or the fuzzy interface air displacement device Cn combination) and the like can be stored in a zero-oxygen storage tank D, or the materials are transferred to other places by the storage tank D.

Description of the drawings: zero oxygen filling chamber flow schematic and air total replacement device Bn combined process flow schematic

The specific implementation mode (the filling content in the embodiment is meal replacement powder, 25 g/bag, three components of mixed powder, dried blueberry, walnut kernel and the like)

Flow chart of zero oxygen filling chamber (see figure 1)

1) And (3) filling nitrogen into the zero-oxygen filling chamber, opening the air inlet and outlet valves (7) and (8), moving the piston type scraper Ag (5) from left to right in the direction of the filling head, and performing full replacement to quickly fill nitrogen, wherein nitrogen behind the scraper Ag is not blended with air in front of the scraper Ag during movement. After the extreme position, close discharge valve (8), open scraper blade conduction valve (6), piston scraper blade Ag (5) return stroke is from right-hand left movement to extreme position, and through scraper blade conduction valve (6) during the return stroke, the two-sided nitrogen gas of scraper blade Ag produces the convection current with the oxygen-containing air and fuses, accomplishes the first dilution to oxygen concentration in the zero oxygen filling room air.

2) Repeating the above full replacement rapid nitrogen charging process n times until the zero oxygen filling chamber reaches a zero oxygen or low oxygen state.

3) The 3 materials pretreated by the zero oxygen are respectively loaded into zero oxygen storage tanks D (1) (2) (3), and the zero oxygen storage tank D can be in full-sealing butt joint with a zero oxygen filling chamber to ensure that the powder or particles of the materials for filling are in a zero oxygen or zero oxygen state.

4) During filling, a packaging bag film (9) enters from a hole wall slit of the zero-oxygen filling chamber, a reel is formed into a small packaging bag (11), the small packaging bag is matched with the metering and batching filling device (10), and the small packaging bag (13) after filling can be cut off after being sent out of the zero-oxygen filling chamber and also can be sent out after being cut off in the zero-oxygen filling chamber. The whole processes of batching, coiling and filling are completed in a zero-oxygen filling chamber.

5) Elastic sealing curtains are arranged on slits and hole walls of the zero-oxygen filling chamber for the packaging bag film (9) and the small packaging bag (13) to pass in and out, so that the inert gas in the zero-oxygen filling chamber can be kept in a positive pressure state.

Air total displacement device Bn combined process flow (see figure 2)

1) Ba, Bb, Bc-Bn of Bn combination are all independently provided with piston type scrapers Bg,

and (3) opening nitrogen inlet and outlet valves above and below the device Ba in the air total replacement device Bn combination, moving the piston type scraper Bg to the highest limit (4) position from the bottom of the device, discharging air on the upper side of the scraper, inputting nitrogen on the lower side of the scraper, and performing air total replacement to enable the interior of the device Ba to reach a zero-oxygen or low-oxygen state.

2) Bb, Bc- - -Bn of Bn combination repeat the operation of Ba in the device, and the inside of each device of Bn combination reaches zero oxygen or low oxygen state.

3) And (4) closing nitrogen input valves at the lower parts of all the Bn combination devices, and spraying or sieving the material mixed powder from a material inlet below the piston type scraper Bg to be dispersed and putting the material mixed powder into the Ba device. The volume of the mixed powder is far smaller than the Ba volume of the device, and the oxygen concentration of air among particles finishes the first dilution in the sedimentation process of the mixed powder.

4) Repeating the operation of the material mixed powder on Bb, Bc-Bn in the Ba device, and after the material mixed powder is diluted for the second time, the third time and the n times, the oxygen concentration of air among the material mixed powder particles reaches a zero oxygen or low oxygen state.

5) Or after the device Ba carries out air full replacement and reaches a zero-oxygen or low-oxygen state, adding the material mixed powder to be processed, closing the upper and lower nitrogen inlet and outlet valves, rotating and rolling the device Ba, fully mixing the material mixed powder with nitrogen, and completing the first dilution of the oxygen concentration of the air among particles.

Then, a piston type scraper Bg is used for carrying out full replacement of nitrogen and aerobic air between the upper top of the device Ba and the surface of the material. Repeating for many times until the oxygen concentration of the air among the material mixed powder particles reaches a zero oxygen or low oxygen state.

6) The two processes are particularly suitable for materials with poor air permeability, such as powder, fine particles and the like, such as mixed powder, blueberries and the like.

7) For large-particle and blocky materials with good air permeability, such as walnut kernels, almonds and the like, the zero-oxygen pretreatment can be carried out by a fuzzy interface air replacement process. Firstly, the air total replacement method is used for leading the inside of each grade of Ba, Bb, Bc- - -Bn combined grade devices to reach a zero oxygen or low oxygen state, then all the grade devices of Ba, Bb, Bc- - -Bn are filled with materials, nitrogen inlet and outlet valves of each grade are opened, and nitrogen is slowly filled in the reverse direction of the order of Bc, Bb and Ba from head to tail. The top vent of the dynamic monitoring device Bc has reached a zero or low oxygen condition, i.e. the nitrogen input from device Bc is changed to device Bb. The device Bc is recharged and arranged behind the device Ba, and the materials in the device Bc can be used for filling.

Claims

1. A zero-oxygen air replacement process for packaging, storing and processing solid food is characterized in that:

the filling and sealing process of the materials is completed under the zero oxygen condition, and during filling, the bag opening of the packaging bag, the filling opening of the filling machine and the metering and feeding unit need to be in a chamber of a zero oxygen filling chamber A (the filling chamber A and the packaging bag are in a zero oxygen or low oxygen state). The zero-oxygen filling chamber A is also provided with other external passages such as slits and holes and the like for entering and exiting packaging paper, materials, finished products and the like. Sealing devices such as curtains and rubber strips need to be arranged on the external channel, and the positive pressure state of inert gas is kept in the zero-oxygen filling chamber A.

When filling, the bag mouth of the packaging bag and the filling mouth of the filling machine are positioned outside the zero-oxygen filling chamber A, oxygen-containing air in the packaging bag is removed before filling, and the bag mouth of the packaging bag and the filling mouth of the filling machine are connected and opened in an external sealing state, and then filling and sealing are carried out.

The materials are sent into a zero-oxygen filling chamber A after being pretreated by a Bn combination (or a Cn combination) of an air total replacement device to reach a zero-oxygen or low-oxygen state; after pretreatment, the wastewater can be temporarily stored in a zero-oxygen storage tank D and then sent into a zero-oxygen filling chamber A.

2. The zero-oxygen air replacement process according to claim 1, wherein the zero-oxygen filling chamber A is provided with a piston type scraper Ag, and air inlet and exhaust gases are not fused with each other and have equal volumes to implement air total replacement; opening scavenging valves at two ends of the zero-oxygen filling chamber A, discharging air at the front side of the scraper when the scraper moves, and inputting inert gas at the rear side of the scraper; when the scraper moves reversely, the scraper Ag can be adjusted to be in a conducting state and does not push air; the scraper moves repeatedly to implement air full replacement, and the oxygen content of the air in the zero-oxygen filling chamber A can be reduced gradually until the zero-oxygen or required low-oxygen state is reached.

3. The zero-oxygen air replacement process of claim 1, wherein the Ba, Bb, Bc-Bn of the air total replacement device Bn are independently provided with piston type scrapers Bg, and the process is implemented according to the following procedures:

opening air exchange valves at the highest end and the lowest end of a device Ba, discharging air at the upper side of a scraper when the scraper moves upwards, and inputting inert gas at the lower side of the scraper to perform air total replacement; so as to make the device Ba reach zero oxygen or low oxygen state.

When the scraper moves upwards to the highest position, the lower end ventilation valve of the device Ba is closed, and the material is sprayed or sieved from a high inlet (the lower side of the scraper position) of the device Ba to be dispersed and fed into the device Ba, so that the material particles are fully fused with the inert gas in the device Ba, and the first dilution of the oxygen concentration among the material particles is realized.

4. The combination of air total displacement apparatus B (Ba, Bb, Bc- - -Bn) as claimed in claim 3, wherein after the apparatus Ba completes an air total displacement process to the material, the material of the apparatus Ba is fed into the apparatus Bb in a spraying or sieving dispersion form through the zero oxygen nozzle and the high inlet of the apparatus Bb.

Because the device Bb is in a zero-oxygen or low-oxygen state after being completely replaced by air before feeding, the material fed into the device Bb can realize the second dilution of the oxygen concentration among material particles.

When the device B is operated in a combined mode, the materials are sequentially subjected to Ba, Bb, Bc-Bn repeated above processes, and the oxygen concentration among the material particles is diluted for the third time, the fourth time and the n times until the oxygen concentration among the material particles sequentially reaches a zero oxygen or low oxygen state.

5. The combination of total displacement air devices B (Ba, Bb, Bc — Bn) of claim 3, further characterized in that the device Ba performs the total displacement of air, and after the material is fed into the device Ba, the device Ba can be rolled or the material can be stirred sufficiently to cause the particles of the material to be sufficiently fused with the inert gas in the device Ba, thereby achieving the first dilution of the oxygen concentration between the particles of the material.

Closing the feed port of the device Ba; the scraper Bg is adjusted to be in a conducting state and does not push air, the conducting state of the scraper Bg is closed after the scraper Bg descends to the material surface, an inert gas input valve between the material surface end and the scraper Bg is opened, the scraper Bg moves upwards repeatedly to carry out air total replacement, and the highest end in the device Ba and the material surface end reach a zero-oxygen or low-oxygen state. And (3) rolling the device Ba again or fully stirring the materials after closing the gas valve which is not needed, so that the material particles are fully fused with the inert gas in the device Ba, and the oxygen concentration between the material particles is diluted for the second time.

And (3) continuing to finish the air full replacement process for n times between the highest end and the object plane end in the Ba device, rolling the Ba device or fully stirring the materials, and diluting the oxygen concentration among the material particles for the third time, the fourth time and the-n times until the oxygen concentration among the material particles in the Ba device gradually reaches a zero-oxygen or low-oxygen state. Without feeding the material into Bb, Bc-Bn. The inert gas can be repeatedly used in the combination of the device B in series according to the concentration level difference.

6. The zero oxygen air displacement process of claim 1, further characterized by a fuzzy interface air displacement device Cn combination, wherein the Ca, Cb, Cc- - -Cn of the device Cn combination can be serially connected for continuous air displacement of larger particle or better permeability materials. The piston type scrapers Cg are independently arranged in the combination of the device Cn, when the device Cn is operated, air full replacement is firstly carried out on the combination of the device Cn by inert gas, and materials are respectively filled when all levels of scrapers of the combination of the Cn reach the highest position;

opening the gas exchange valves of each stage of Cn series combination connected end to end, and inputting inert gas from the lower end of the final stage device Cc of Cn series combination to flow to Cb, Ca and- -in turn. When the oxygen concentration in the device Cc is reduced to the process design requirement, a connecting air pipe from the device Cc to the Cb is disconnected, an inert gas input interface is switched from the device Cc to the Cb, and the device Cc is changed into the final stage (Cb, Ca, Cc- -) after discharging and reloading. Or the inert gases can be input from the upper end in an end-to-end way.

7. The combination of full displacement air displacement devices Bn (or combination of fuzzy interface air displacement devices Cn) as set forth in claim 1, further characterized by either Bn or Cn combination. A booster and a pneumatic cushion pack may be disposed between the Ba, Bb, Bc-Bn displacement devices, respectively.

8. The zero oxygen storage tank D according to claim 1, which can be matched with a dedicated air total displacement device Dz, and can be separated from the device Dz after the total displacement process is completed, and the zero oxygen or low oxygen state in the storage tank D can be independently maintained. The feed and discharge port of the zero-oxygen storage tank D can be in butt joint with the air replacement device and the zero-oxygen filling chamber A, so that the temporary storage and the transfer of materials in a zero-oxygen state are completed.