JPS63138996A - Anti-oxidation device for liquefied and semi-liquefied store - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an antioxidant device for liquid and semi-liquid materials.

[Conventional technology]

Generally, liquid and semi-liquid products develop mold and mildew during storage.
The quality deteriorates due to spoilage caused by microorganisms, discoloration, loss of taste, etc., and this is often caused by oxygen. Therefore, it is possible to prevent their deterioration in an oxygen-free environment, and the methods used to create an oxygen-free condition include nitrogen sealing or nitrogen replacement, and methods that allow oxygen scavengers to coexist with stored materials in a closed system. It is known that the acid accumulator method can be used, for example, to maintain the color and flavor quality of sake and soy sauce, to prevent oxidation of edible oils, to prevent discoloration of jams and tomato juice, and to prevent mold formation.

By the way, conventional storage systems for liquid and semi-liquid materials have been to keep the stored material in a sealed or dissolvable tank to maintain a minimum space ratio and to prevent expansion and contraction due to temperature changes. A device that prevents pressure changes through the breathing action of an Atmos valve or a nozzle with a filter, or a device in which the stored material is placed in a closed tank and the air in the upper space of the tank is purged with nitrogen gas to form a nitrogen seal, resulting in the above-mentioned oxidation. Some methods have been adopted to prevent deterioration.

[Problem that the invention seeks to solve]

However, such conventional storage devices in liquid and semi-liquid storage tanks cannot prevent the oxidation of the stored material due to oxygen due to the storage condition in the presence of air, or It is impossible to completely remove oxygen even if the gas is placed under a nitrogen gas seal, and even if a large amount of nitrogen gas is used, the presence of oxygen will be allowed in the gas composition, and oxidation prevention will not be achieved. It was something. Moreover, in any case, it is difficult to deal with changes in the temperature inside the storage tank or changes in the pressure state inside the tank due to liquid withdrawal, etc., and the reality is that it is impossible to deal with it.

The present invention overcomes the drawbacks of conventional liquid and semi-liquid storage devices as described above, and it is an object of the present invention to minimize the amount of nitrogen gas used and operate under substantially anoxic conditions. To provide a storage device for liquid and semi-liquid materials, which enables the storage of liquid and semi-liquid materials in a storage tank, has almost no loss of nitrogen gas, and can cope with changes in conditions such as pressure inside a storage tank. be.

[Means for solving problems]

The present inventors completed the present invention as a result of various studies on an apparatus that circulates gas in a storage tank using nitrogen gas and removes oxygen in the system gas using an oxygen scavenger.

That is, the present invention provides one or more storage tanks having a structure that can be sealed, an oxygen scavenger container, a filter disposed between the storage tank and the oxygen scavenger container, and a blower that circulates gas within the system. This is an oxidation prevention device for liquid and semi-liquid stored materials, in which a circulation path is formed by a nitrogen gas holder, and the nitrogen gas holder is a cylindrical tank with an open top and containing an appropriate amount of water. has an outer cylinder with at least three rails attached thereto, and a bell-shaped container with the top closed inside the outer cylinder, and a guide roller on the outer surface of the side surface that contacts the rails. The system consists of a bell which is attached with a bell and can be operated in the vertical direction, and a space inside the bell which is formed by the water housed in the outer cylinder and the bell and which is communicated with the circulation path through piping. The present invention relates to an oxidation prevention device for liquid and semi-liquid stored materials, characterized in that the oxygen concentration in the storage tank and system is reduced to substantially 0% while maintaining internal pressure balance.

In the present invention, a circulation path is formed by a sealable liquid and semi-corrugated storage tank (one or more), a filter, a deoxidizing agent container, a blower, and a nitrogen gas holder, and after the storage is injected, By purging the space inside the storage tank with nitrogen gas and then circulating the gas within the system, the system is kept at a constant pressure by utilizing the action of the oxygen absorber stored in the oxygen absorber container and by the action of the nitrogen gas holder. This is an oxidation prevention device for liquid and semi-liquid stored materials that can maintain the oxygen concentration in the system at substantially 0% by removing oxygen in the storage tank and the same system while maintaining the oxygen concentration in the system. It is characterized by being equipped with a chemical container and a nitrogen gas holder.

In the present invention, the liquid and semi-corrugated material storage tank is usually a cylindrical vertical closed type tank.

The oxygen scavenger container in the present invention is preferably a container that accommodates the oxygen scavenger and allows circulating gas to pass from the bottom to the top. The circulating feed gas is deoxidized by passing through an oxygen scavenger container.

The filter in the present invention is installed between the oxygen scavenger container and the storage tank, and is provided to filter the gas introduced into the storage tank. The blower is installed to circulate gas within the system and promote deoxygenation within the system by the action of the oxygen absorber contained in the oxygen absorber container. It is preferable to install the blower in front of the oxygen scavenger container so that the gas to be deoxidized can be efficiently sent to the oxygen scavenger container.

The nitrogen gas holder in the present invention has a function generally used in chemical equipment and the like. This nitrogen gas holder consists of an outer cylinder, a gas trap, and an appropriate amount of water contained in the outer cylinder. The outer cylinder is a cylindrical tank with an open top, and has at least three rails vertically attached to the inner surface of the side surface. A chimney is a bell-shaped container placed inside an outer cylinder with the top closed.
A guide roller is attached to the outer surface of the side surface and is in contact with the rail, and can be operated in the vertical direction by moving the guide roller along the rail. An appropriate amount of water is stored in the outer cylinder, and the water and the air barrier form a sealed space, and the space inside the air space is communicated with the circulation path through piping.

The space inside the gas tube is configured such that the open end of the gas tube does not come into contact with the bottom surface of the outer tube even when its volume is the smallest. Preferably.

By installing a nitrogen gas holder in this way, the air pressure rises and falls in response to changes in the pressure within the system, and the volume of the sealed space changes, making it possible to maintain a constant system pressure at a constant level. It is.

The oxygen absorber contained in the oxygen absorber container may be any oxygen absorber as long as it has the ability to absorb oxygen, but ordinary oxygen absorbers such as sulfites, bisulfites, dithionites,
Ferrous salts such as ferrous sulfate, hydroquinone, catechol,
resorcinol, pyrogallol, gallic acid, rongalite,
Ascorbic acid and/or its salts, isoascorbic acid and/or its salts, sorbose, glucose,
Oxygen scavenger containing lignin, dibutylated hydroxytoluene or butylated hydroxyanisole, or
An oxygen absorber containing metal powder such as iron powder is used, and a carbon dioxide gas generating type oxygen absorber or a carbon dioxide gas absorbing type oxygen absorber is also used. Among these oxygen scavengers, oxygen scavengers containing iron powder or the like are preferred. The oxygen scavenger is preferably a solid one.

In the present invention, a storage tank, a filter, an oxygen scavenger container, a blower, and a nitrogen gas holder are essential, but other mechanisms can be provided as necessary. Examples include various valves, manometers, liquid level gauges, exhaust ports, nitrogen gas cylinders, safety valves, pressure reducing valves, etc.

An example of the device of the present invention will be explained with reference to the drawings.

FIG. 1 shows one embodiment of the apparatus of the present invention, and the drawing shows a blower 200, an oxygen scavenger container 300, a filter 400, a storage tank 500, 500a, a nitrogen gas holder 100, a nitrogen gas cylinder 600, and these. The equipment is assembled with piping that connects the equipment.

First, when storing stored items in the storage tank 500, the inside of the storage tank 500 and the equipment system are purged with nitrogen gas in advance to purge the air in the system, and then the entire system is shut off from outside air and the blower 200 is started. Although there is a method of circulating the system gas to completely remove residual oxygen in the system gas and then injecting the stored material into the storage tank 500, the following method is used in consideration of efficiency and economy. It is preferable. The air inside the storage tank 500 is purged with nitrogen gas to create a nitrogen gas atmosphere.
Among the valves attached to the blower 200, the liquid inlet valve 512, the circulation piping valve 592, and the vent pipe valve 511 are opened, and the other valves are closed.As for the piping circuit, the valves 593 and 691 on the suction side of the blower 200 are opened. shall be. Under this condition, a predetermined amount of stored material is poured into the storage tank 500, and when the injection is completed, the liquid inlet valve 512 is closed. Subsequently, nitrogen gas is supplied from the nitrogen gas cylinder 600 to replace the air in the space within the storage tank 500 with nitrogen gas. After replacement, the vent pipe valve 511 is closed. If there are multiple storage tanks such as 500a, 500b, etc., this operation is repeated one after another to create a nitrogen gas atmosphere.

Next, the required valves in the system circulation piping by the blower are opened and the blower 200 is activated to circulate the system gas and remove residual oxygen in the system via the oxygen scavenger container 300.

If there are a plurality of storage tanks, the circulating gas inlet valve 591 at the top of the storage tank is adjusted as appropriate in order to equalize the distribution of the circulating gas air volume by the blower 200 as much as possible. Thereafter, nitrogen gas is separately injected into the nitrogen gas holder 100 from a nitrogen gas cylinder 600 to establish electrical continuity with the piping within the apparatus system, thereby making the metal bodies within the system uniform. The blower 200 may be stopped during storage when the oxygen in the system gas is removed and becomes below a predetermined value.

While the stored material is stored under the above conditions, the nitrogen gas holder 100 buffers against changes in the volume of the gas in the system due to temperature changes of the stored material in the storage tank, and the rail attached to the outer cylinder 100 A bell 120 provided with a guide roller 121 moves up and down along the bell 111, so that the bell 12
The volume of the space 150 inside 0 fluctuates to maintain the pressure balance of the gas in the system.

When extracting the stored material from the storage tank after storage, the operating method differs depending on whether an appropriate amount or the entire amount is extracted. First, when extracting an appropriate amount, the liquid outlet valve 513 of the storage tank 500 to be extracted is opened, and there is no need to operate any other valves attached to the storage tank, and the required amount can be extracted. The nitrogen gas holder 100 provides a buffer against changes in pressure due to a drop in the liquid level in the storage tank, and the pressure balance is maintained in the same manner as described above. On the other hand, if the entire amount of liquid in the storage tank is to be extracted, the same operation as above may be used, but since this increases the volume of the nitrogen gas holder 100 and may cause further loss of atmospheric gas or nitrogen gas, Preferably, the operation is carried out by a method. That is, the set of valves attached to the storage tank 500 is closed, and then the vent pipe valve 511 is closed.
Then, the liquid outlet valve 513 is opened to extract the entire amount.

After the liquid has been drained, the entire inside of the storage tank is replaced with air, so it remains in that state until the next liquid injection. When injecting the liquid again, the initially performed operation must be repeated.

Regarding the handling of the oxygen absorber container 30G, there is no particular need for an oxygen absorber after the above operations have been performed to create a deoxidized state in the device system, and after that, operations such as pouring in or taking out the stored items in the storage tank are performed. Therefore, as long as air is not introduced from outside the system, a deoxidized state is maintained, so an oxygen absorber is not necessary.

To load and replace the oxygen absorber in the oxygen absorber container 300, first close the system gas circulation piping valves before and after the oxygen absorber container 300, remove the top lid of the oxygen absorber container 300, and then perform the work. Seal the top lid and then remove the oxygen absorber container 3.
Open the valves before and after 00 to start deoxidation.

〔Effect of the invention〕

The device of the present invention solves the problem of residual oxygen in conventional liquid or semi-liquid storage devices by installing an oxygen scavenger container, and also eliminates the problem of liquid volume fluctuations, oxygen absorption, and storage temperature changes. It responds sensitively to changes in the pressure state within the tank system, and maintains the equilibrium state within the system efficiently and at low pressure without purging the atmospheric gas within the system or drawing in outside air. Ru. Therefore, by using the apparatus of the present invention, liquid and semi-liquid substances that are susceptible to deterioration due to oxidation, such as Japanese sake, wine, soy sauce, jam, mayonnaise, and dressing, can be suitably stored.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the device for preventing oxidation of liquid and semi-liquid stores according to the present invention. In the figure, 100 nitrogen gas holder 110 outer cylinder 11 rules
120 Bell 121 Guide roller 130 Water 131 Water inlet 132 Water outlet 140 Piping open end 150 Space inside the bell 191 Valve
200 blower 201 stop valve
300 deoxidizing agent container, 400 filter 50
0 storage tank 500a storage tank 511 vent pipe valve 512 liquid population valve 513 liquid outlet valve 5
14 Liquid level gauge 519 Pressure gauge 591 Valve
592 valves 593 valves 600 nitrogen gas cylinders 60
1 Pressure reducing valve 602 Safety valve 609 Pressure gauge
Represents 691 valves.

Claims (1)

[Scope of Claims] One or more storage tanks having a structure that can be sealed, an oxygen scavenger container, a filter disposed between the storage tank and the oxygen scavenger container, and a blower that circulates gas within the system. This is an oxidation prevention device for liquid and semi-liquid stored materials, in which a circulation path is formed by a nitrogen gas holder, and the nitrogen gas holder is a cylindrical tank with an open top and containing an appropriate amount of water. has an outer cylinder with at least three rails attached thereto, and a bell-shaped container with the top closed inside the outer cylinder, and a guide roller on the outer surface of the side surface that contacts the rails. The system consists of an air bell that is attached and can be operated in the vertical direction, and a space inside the air bell that is formed by the water housed in an outer cylinder and the air bell and that is communicated with the circulation path through piping. A device for preventing oxidation of liquid and semi-liquid stores, characterized in that the oxygen concentration in the storage tank and system is maintained at substantially 0% while maintaining pressure equilibrium.