CN113306770B

CN113306770B - Zero-oxygen air replacement process and device for packaging, storing and processing solid food

Info

Publication number: CN113306770B
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: 2023-05-26
Anticipated expiration: 2041-04-12
Also published as: CN113306770A

Abstract

The invention discloses a zero-oxygen air replacement process and a device for packaging, storing and processing solid foods. The invention also discloses a matched device such as an air total replacement device Bn combination (or a fuzzy interface air replacement device Cn combination) and the like and a corresponding technological process application, and the solid food is pretreated, so that the oxygen content of air among solid food particles entering the zero-oxygen filling chamber A is gradually reduced 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 solid food still keeps fresh and delicious without 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 solid food packaging, storage and processing, in particular to 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 matched with the zero-oxygen air replacement process.

Background

The current filling process of solid food is implemented in an aerobic environment, the oxygen content among powder and particles of the food raw material to be filled is very high, and the oxygen concentration in the air in the packaging bag is higher after filling and sealing. Even though the oxygen-deficient preservation methods such as vacuumizing, filling inert gas and the like are adopted after filling, the oxygen in the package or the container cannot be completely removed, and the food materials and the food cannot be kept in a fresh state in the storage and shelf life. Chemical additives such as preservative and antioxidant are required.

1. The conventional technology has the following defects:

1) Taking 500g of independent package as an example (such as solid food of walnut kernel particles, powder, flakes and the like), the traditional process fills small bags of the iron oxide before bagging and sealing, and can improve the quality of shelf life. However, if the food cannot be eaten once after the bag is opened, the taste and flavor can be affected in a short period after the food is wetted, and the food can be deteriorated after a long time.

2) For example, high-fat and high-protein foods such as nut packets, meal replacement powder and the like which are independently packaged by about 50g and 500g or more are not suitable for small and large iron oxide packets because the packages are too small and too large, and only preservatives and antioxidants are selectively added.

3) Traditional vacuum and nitrogen filling cannot completely expel oxygen in the bag, and high-concentration oxygen still exists among powder or particles in the package. Resulting in a continuous decline in the quality and mouthfeel of the food product in the bag over time, some brands of nut packets even complain and recall hundreds of times per year.

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

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

1) So that the food materials and foods can still keep fresh under the condition of no preservative, antioxidant and other chemical antistaling agents.

2) Preparing new industry standard and national standard of food and medicine equipment and food and medicine products under the support of zero-oxygen engineering technology,

disclosure of Invention

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

The method is characterized in that the material filling and sealing process is completed under the condition of zero oxygen. During filling, the mouth of the packaging bag, the filling mouth of the filling machine and the metering and feeding unit need to be in a 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, for example, 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 required to be removed before filling, and the bag opening of the packaging bag and the filling opening of the filling machine are connected in an outward sealing state and are filled after opening.

The device is further characterized in that when the piston type scraping plate Ag arranged in the zero-oxygen filling chamber is pushed, air inlet and exhaust gases are not fused with each other, and air full replacement can be implemented, so that the inside of the filling chamber A is quickly in a zero-oxygen or low-oxygen state. The inert gas positive pressure state is kept in the zero-oxygen filling chamber A.

Another object of the present invention is to provide a combination of air total displacement devices Bn, a combination of fuzzy interface air displacement devices Cn and a zero-oxygen storage tank D for a solid food oxygen-displacement process. The Bn combination, cn combination and the zero-oxygen storage tank D are respectively provided with piston type scraping plates Bg, cg and Dg, so that the full replacement of air can be implemented, and the inside of the filling chamber A can be quickly in a zero-oxygen or low-oxygen state.

The method is characterized in that when materials pass through an air full replacement device Bn filled with inert gas, the concentration of oxygen among the material particles is gradually reduced, and finally, the oxygen reaches a zero-oxygen or low-oxygen state.

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

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

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

Specific embodiment (example filling content: meal replacement powder, 25 g/bag, three ingredients including mixed powder, dried blueberry and walnut kernel)

Zero oxygen filling chamber flow diagram (see FIG. 1)

1) And (3) filling nitrogen in the zero-oxygen filling chamber, opening the air inlet and outlet valves (7) and (8), and moving the piston type scraping plate Ag (5) from left to right towards the filling head, wherein nitrogen behind the scraping plate Ag is not fused with air in front of the scraping plate Ag in the movement process, so that full replacement and rapid nitrogen filling are implemented. After the device reaches the limit position, an exhaust valve (8) is closed, a scraper conduction valve (6) is opened, a piston type scraper Ag (5) moves back to the limit position from right to left, and during back stroke, through the scraper conduction valve (6), nitrogen on two sides of the scraper Ag and oxygen-containing air are subjected to convection fusion, so that the first dilution of the oxygen concentration in the air in the zero-oxygen filling room is completed.

2) Repeating the above full-replacement rapid nitrogen filling process for n times until the zero oxygen or low oxygen state is reached in the zero oxygen filling chamber.

3) 3 materials subjected to zero-oxygen pretreatment are respectively filled into zero-oxygen storage tanks D (1) (2) (3), and the zero-oxygen storage tanks D can be in full-sealing butt joint with a zero-oxygen filling chamber, so that powder or particles of the materials for filling are in a zero-oxygen or zero-oxygen state.

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

5) The slit and the hole wall of the zero-oxygen filling chamber for the inlet and outlet of the packaging bag film (9) and the small packaging bag (13) are provided with elastic sealing curtains, so that inert gas in the zero-oxygen filling chamber can be kept in a positive pressure state.

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

1) The Ba, bb and Bc-Bn combined by Bn are all independently provided with piston type scraping plates Bg,

and opening nitrogen inlet and outlet valves on the upper and lower sides of the device Ba in the air total replacement device Bn combination, moving the piston type scraping plate Bg to the highest limit (4) position from the bottom of the device, discharging air on the upper side of the scraping plate, inputting nitrogen on the lower side of the scraping plate, and performing air total replacement to ensure that the inside of the device Ba is in a zero-oxygen or low-oxygen state.

2) Bb, bc- -Bn of Bn combinations repeat the operation of device Ba, with each Bn combination reaching a zero or low oxygen condition within the device.

3) And closing nitrogen input valves at the lower parts of the Bn combination devices, and spraying or sieving the material mixed powder into the device Ba in a dispersed manner from a material inlet below the piston type scraping plate Bg. The volume of the mixed powder is far smaller than the volume of the device Ba, and the oxygen concentration of air among particles in the sedimentation process of the mixed powder is diluted for the first time.

4) Repeating the operation of the material mixed powder in Bb, bc-Bn in the device Ba, and after the material mixed powder is subjected to secondary dilution, tertiary dilution and n dilutions, the oxygen concentration of air among the material mixed powder particles reaches a zero-oxygen or low-oxygen state.

5) And after the device Ba is subjected to air full replacement and reaches a zero-oxygen or low-oxygen state, the mixed powder of the materials to be treated is put into the device Ba, the upper and lower nitrogen inlet and outlet valves are closed, the device Ba is rotated and rolled, the mixed powder of the materials and the nitrogen are fully and uniformly mixed, and the first dilution of the oxygen concentration of the air among particles is completed.

Then, a piston type scraper Bg is used for carrying out full replacement of nitrogen and aerobic air between the top of the device Ba and the surface of the material. Repeating for multiple times until the oxygen concentration of 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 block-shaped materials with good air permeability, such as walnut kernels, almonds and the like, the zero-oxygen pretreatment can be performed by a fuzzy interface air replacement process. Firstly, using an air full replacement method to enable the Ba, bb and Bc-Bn devices at all levels to reach a zero-oxygen or low-oxygen state, fully filling the Ba, bb and Bc-Bn devices at all levels with materials, opening nitrogen inlet and outlet valves at all levels, and reversely and slowly filling nitrogen in the order of Bc, bb and Ba from head to tail. The top exhaust port of the dynamic monitoring device Bc reaches a zero-oxygen or low-oxygen state, and the nitrogen input end can be changed into the device Bb from the device Bc. The device Bc is reloaded 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:

when the material filling and sealing process is finished under the condition of zero oxygen, the bag mouth of the packaging bag, the filling mouth of the filling machine and the metering and feeding unit are required to be in a zero oxygen filling chamber A, the inside of the filling chamber A and the inside of the packaging bag are in a zero oxygen or low oxygen state, the zero oxygen filling chamber A is also provided with other external channels such as slits, holes and the like for entering and exiting packaging paper, materials, finished products and the like, and the external channels are required to be provided with sealing devices such as curtains, rubber strips and the like, so that the inert gas positive pressure state is maintained in the zero oxygen filling chamber A;

when filling, the bag opening of the packaging bag and the filling opening of the filling machine are positioned outside the zero-oxygen filling chamber A, oxygen-containing air in the packaging bag is required to be removed before filling, and the bag opening of the packaging bag and the filling opening of the filling machine are connected in an outward sealing state and are filled and sealed after being opened; the material is pretreated to reach a zero-oxygen or low-oxygen state through the combination of the air full replacement device Bn or the combination of the fuzzy interface air replacement device Cn, and then is sent into the zero-oxygen filling chamber A; after pretreatment, the waste water can be temporarily stored by a zero-oxygen storage tank D and then sent into a zero-oxygen filling chamber A;

the Ba, bb and Bc-Bn combined by the air total replacement device Bn are respectively provided with a piston type scraping plate Bg independently, and the method is implemented according to the following flow: switching on the gas exchange valves at the highest and lowest ends of the device Ba, exhausting air at the upper side of the scraper when the scraper moves upwards, inputting inert gas at the lower side of the scraper, and performing full air replacement; so as to lead the inside of the device Ba to reach a zero-oxygen or low-oxygen state;

when the scraper plate moves up to the highest position, the lower end scavenging valve of the device Ba is closed, materials are sprayed or sieved and dispersed from the high inlet of the device Ba, and the lower side of the scraper plate is sent into the device Ba, so that the material particles and inert gas in the device Ba are fully fused, and the first dilution of the oxygen concentration among the material particles is realized;

ba. After Bb and Bc-Bn device Ba completes an air total replacement process on the material, the material of the device Ba is sent into the device Bb in a spraying or sieving dispersion form from a discharge hole through a zero oxygen connecting pipe and a high inlet of the device Bb, and the material sent into the device Bb can realize secondary dilution of the oxygen concentration among material particles because the material sent into the device Bb is in a zero oxygen or low oxygen state after the air total replacement before the material is fed into the device Bb; when the device Bn operates in a combined way, the materials pass through Ba, bb and Bc-Bn, the processes can be sequentially repeated, and the oxygen concentration among the material particles is diluted for the third time and the fourth time-n times until the oxygen concentration among the material particles sequentially reaches a zero oxygen or low oxygen state;

the fuzzy interface air replacement device Cn combination is used for continuously replacing the materials with larger particles or better air permeability after Ca, cb and Cc-Cn of the device Cn combination are connected in series, the piston type scraping plates Cg are independently arranged in the device Cn combination, during operation, the device Cn combination is firstly subjected to air full replacement by inert gas, all levels of scraping plates of the Cn combination reach the highest position, all levels of air exchange valves of the Cn series combination which are connected end to end are respectively filled with the materials, inert gas is input from the lower end of a final device Cc of the Cn series combination, and flows to Cb, ca and Cb sequentially, when the oxygen concentration in the device Cc is reduced to the process design requirement, the connecting air pipes of the devices Cc to Cb are disconnected, an inert gas input interface is switched from the device Cc to Cb, the last levels Cb, ca and Cc-after reloading are changed, and inert gas can be input from the upper end through end.

2. The zero-oxygen air replacement process according to claim 1, further characterized in that the zero-oxygen filling chamber a is provided with a piston type scraper Ag, the intake and exhaust gases are not fused with each other, and the air full replacement is performed; opening the air exchange valves at the two ends of the zero-oxygen filling chamber A, discharging air at the front side of the scraping plate when the scraping plate moves, and inputting inert gas at the rear side of the scraping plate; when the scraping plate moves reversely, the scraping plate Ag can be adjusted to be in a conducting state so as not to push air; the scraping plate repeatedly moves to perform full replacement of air, so that the oxygen content of the air in the zero-oxygen filling chamber A can be gradually reduced until the zero-oxygen or required low-oxygen state is reached.

3. The zero-oxygen air replacement process of claim 1, wherein the Bn combination is further characterized in that after the device Ba completes the air full replacement process, the device Ba can be rolled or the material can be fully stirred after the material is 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;

closing the feed inlet of the device Ba; regulating the scraping plate Bg to a conducting state, not pushing air, closing the conducting state of the scraping plate Bg after the scraping plate Bg descends to a material surface, opening an inert gas input valve between the object surface end and the scraping plate Bg, repeating the upward moving process of the scraping plate Bg to perform air full replacement, enabling the highest end in the device Ba to reach a zero-oxygen or low-oxygen state, closing an air valve which is not needed, then rolling the device Ba again or fully stirring the material, enabling material particles to be fully fused with the inert gas in the device Ba, and realizing the second dilution of the oxygen concentration among the material particles;

the device Ba can be rolled or the materials can be fully stirred, the oxygen concentration among the material particles can be diluted for the third time and the fourth time-n times until the oxygen concentration among the material particles in the device Ba gradually reaches a zero-oxygen or low-oxygen state, the materials are not required to be fed into Bb and Bc-Bn, and inert gases can be repeatedly used in series in the device B combination according to the concentration level difference.

4. The zero-oxygen air displacement process of claim 1, further characterized by a Bn combination or a fuzzy interface air displacement device Cn combination, each between Ba, bb, bc-Bn and Ca, cb, cc-Cn displacement devices, a booster and a pneumatic buffer pack may be provided.

5. The zero-oxygen air replacement process as claimed in claim 1, further characterized in that the zero-oxygen storage tank D can be matched with a special air total replacement device Dz, is separated from the device Dz after the total replacement process is completed, and independently maintains the zero-oxygen or low-oxygen state in the storage tank D, and the material inlet and outlet of the zero-oxygen storage tank D can be in butt joint with the air replacement device and the zero-oxygen filling chamber a to finish temporary storage and transportation of materials in the zero-oxygen state.