JPS59212670A - How to adjust the atmosphere in a storage room - Google Patents
How to adjust the atmosphere in a storage roomInfo
- Publication number
- JPS59212670A JPS59212670A JP8571983A JP8571983A JPS59212670A JP S59212670 A JPS59212670 A JP S59212670A JP 8571983 A JP8571983 A JP 8571983A JP 8571983 A JP8571983 A JP 8571983A JP S59212670 A JPS59212670 A JP S59212670A
- Authority
- JP
- Japan
- Prior art keywords
- nitrogen
- atmosphere
- oxygen concentration
- valve
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 45
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 238000001179 sorption measurement Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 description 27
- 229910052760 oxygen Inorganic materials 0.000 description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 26
- 239000007788 liquid Substances 0.000 description 7
- 239000003463 adsorbent Substances 0.000 description 5
- 235000013399 edible fruits Nutrition 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 238000003795 desorption Methods 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は穀物や果物の貯蔵に係り、特に自己呼吸ｆ’＋
川を抑制して長期間貯蔵するに好適な雰囲気調整力〆Ｊ
モに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the storage of grains and fruits, and in particular to self-breathing f'+
Atmosphere adjustment power suitable for long-term storage by suppressing river flow〆J
Regarding Mo.
・般に、穀物、果物などの鮮度低下や６５敗劣化は収穫
後も引続き行なわれる呼吸作用、有害微生物の発生なと
によって生じ、鮮度を維持したままの長期保存を困り１
１Ｆにしている。対策の１つとして低／！１１目ｌ′ｊ
′蔵があり、２〜５℃を下限として低温障害を防止して
いる。別な方法として酸素濃度を調節し、呼吸作用を抑
制して鮮度維持を図る方法がある。これは酸素濃度を呼
吸作用が停市されない程度、一般に２ないし１０％の範
囲に調整して鮮度維持を図ることができる。・Generally, the loss of freshness and deterioration of grains, fruits, etc. is caused by the continued respiration even after harvest, and the generation of harmful microorganisms, making it difficult to store them for long periods while maintaining their freshness.
It is on the 1st floor. One of the countermeasures is low/! 11th l'j
The lower limit is 2-5℃ to prevent low-temperature damage. Another method is to maintain freshness by adjusting oxygen concentration and suppressing respiration. Freshness can be maintained by adjusting the oxygen concentration to an extent that does not stop the respiration, generally in the range of 2 to 10%.
低温貯蔵と酸素濃度調節とを併用すれば最も効果的であ
るが貯蔵コストが高くなり目的に応じて使いわけられて
いる。It is most effective to use both low-temperature storage and oxygen concentration adjustment, but this increases storage costs and is used differently depending on the purpose.
従来、酸素濃度を調整する方法としては窒素ガスの封入
が知られている。これは一般的には液体窒素を気化させ
て供給し酸素濃度を調整するものであり、大型倉庫等に
利用されている。この方法は、（１）沸点が一］９７℃
と低い液体窒素を使用するため高価な容器及び気化器を
必要とする。（２）液体窒素の蒸気圧が高いために操作
ＥＩＥ力が高くなる。（３）液体窒素を購入し搬入して
使用するため維持管理が面倒である等の問題点がある。Hitherto, as a method of adjusting oxygen concentration, filling in nitrogen gas has been known. This generally supplies vaporized liquid nitrogen to adjust the oxygen concentration, and is used in large warehouses and the like. This method requires (1) a boiling point of 97°C;
and low liquid nitrogen, requiring expensive containers and vaporizers. (2) The operational EIE force is high because the vapor pressure of liquid nitrogen is high. (3) Since liquid nitrogen must be purchased and brought in for use, there are problems such as troublesome maintenance and management.
本発明は液体窒素等を使用することなく、酸素濃度を調
整した効果的な雰囲気調整方法を提供することにある１
、特に簡易にしかも安価に長期貯蔵を達成できる方法を
提供する。An object of the present invention is to provide an effective atmosphere adjustment method that adjusts oxygen concentration without using liquid nitrogen or the like.
To provide a method that can achieve long-term storage in a particularly simple and inexpensive manner.
本発明は大気中の酸素ガスを除去して窒素富化カスを発
生する機能、すなわち、圧力差吸着法（Ｐｒｅｓｓｕｒ
ｅ Ｓｗｉｎｇ Ａｄｓｏｒｐｔｉｏｎ、略称ＰＳＡ）
による窒素濃縮装置（略称Ｎ２ＰＳＡ装置）を用いて、
気密貯蔵袋中に貯蔵した穀物、果物等を窒素富化ガス状
態に保持するものである。すなわち、貯蔵物を気密貯蔵
袋に入れ、袋内を減圧して袋内の空気容積を最小にし、
ここに窒素富化ガスを尋人し、酸素センサー等により所
定の酸素濃度に調整するものである。The present invention has a function of removing oxygen gas from the atmosphere and generating nitrogen-enriched gas, that is, a pressure difference adsorption method (Pressur
e Swing Adsorption, abbreviated as PSA)
Using a nitrogen concentrator (abbreviated as N2PSA device) by
Grains, fruits, etc. stored in airtight storage bags are kept in a nitrogen-enriched gas state. That is, the stored items are placed in an airtight storage bag, the inside of the bag is depressurized to minimize the air volume inside the bag,
Nitrogen-enriched gas is introduced here, and the oxygen concentration is adjusted to a predetermined level using an oxygen sensor or the like.
Ｎ２ＰＳＡ装置は酸素と窒素の吸着速度の異なる吸着剤
を使用し、加圧下で酸素を吸着除去し、窒素富化空気を
得るものである。酸素を吸着した吸着剤は減１（ミする
ことにより酸素を脱着し再生される。第１図に吸着剤と
して分子ふるい活性炭を使用した場合の吸着圧力と窒素
富化空気中の酸素濃度の関係を例示する。酸素濃度は吸
着圧力を増加または脱４ｑ圧力を減少することによって
低下する。The N2PSA device uses adsorbents with different adsorption rates for oxygen and nitrogen, and adsorbs and removes oxygen under pressure to obtain nitrogen-enriched air. The adsorbent that has adsorbed oxygen is desorbed and regenerated by reducing the amount of oxygen. Figure 1 shows the relationship between adsorption pressure and oxygen concentration in nitrogen-enriched air when molecular sieve activated carbon is used as an adsorbent. The oxygen concentration is decreased by increasing the adsorption pressure or decreasing the de4q pressure.
また、窒素富化空気中の酸素濃度は吸着剤に対する空気
の空間速度、吸着工程及び脱着工程の切替時間を変更す
ること（こよって変化さぜることかできる。In addition, the oxygen concentration in the nitrogen-enriched air can be changed by changing the space velocity of the air relative to the adsorbent and the switching time between the adsorption process and the desorption process.
長期貯蔵の場合には、穀物、果物等の自己呼吸にもとず
く酸素濃度の変化が問題になるが、貯蔵袋内の酸素濃度
を酸素センサーにより検出し、 Ｎ２ＰＳＡ装置の運転
を制御し、所定の酸素濃度範囲に保持させることができ
る。In the case of long-term storage, changes in oxygen concentration due to self-respiration of grains, fruits, etc. become a problem, but the oxygen concentration inside the storage bag is detected by an oxygen sensor, and the operation of the N2PSA device is controlled to maintain the specified level. The oxygen concentration can be maintained within the range of .
以下、本発明の一実施例を第 図により説明する。■ば
Ｎ２ＰＳＡ装置であり、圧縮機２、吸着塔３．４弁５な
いし１１、配管１２ないし］５から構成されている。１
６は気密貯蔵袋であり、弁１７．１８．１９と、開閉チ
ャック２０、酸素センサー２１、調節器２２等を備えて
いる。２３は貯蔵物である。An embodiment of the present invention will be described below with reference to the drawings. (3) is an N2PSA device, which is composed of a compressor 2, an adsorption tower 3, 4, valves 5 to 11, and piping 12 to ]5. 1
Reference numeral 6 denotes an airtight storage bag, which includes valves 17, 18, and 19, an opening/closing chuck 20, an oxygen sensor 21, a regulator 22, and the like. 23 is a storage item.
以上の構成において、作動例を説明する。弁１７を開き
、１８．１９を閉じ、弁５を開けて、圧縮機２を運転す
ると、気密貯蔵袋Ｉ６内は減圧になり、貯蔵物２２の形
状に沿った最小空気容積（こなる。次に弁］７．５を閉
じ、かつ、配管１２を大気開放し、弁１８を開放した状
態てＮ２ＰＳＡ装置を運転する。配管Ｊ２からの空気は
圧縮機２で所定１［力にシ１−圧され、配管■３、弁６
（または９）を経１１１シて吸着塔３（または４）に
送られ、吸着塔に充拍されている吸着剤によって酸素の
一部を吸着除去されて窒素富化空気として弁８（または
Ｊｌ）、配管１４、弁１８を経由して気密貯蔵袋１６に
供給される （以下吸着工程と称する。）。In the above configuration, an example of operation will be explained. When the compressor 2 is operated by opening the valve 17, closing the valves 18 and 19, and opening the valve 5, the inside of the airtight storage bag I6 becomes depressurized, and the minimum air volume that follows the shape of the stored material 22 (this happens. The N2PSA device is operated with the valve 7.5 closed, the pipe 12 vented to the atmosphere, and the valve 18 opened.The air from the pipe J2 is supplied to the compressor 2 to a predetermined and piping ■3, valve 6
(or 9) and is sent to adsorption tower 3 (or 4) through valve 8 (or Jl. ), pipe 14, and valve 18 to the airtight storage bag 16 (hereinafter referred to as the adsorption step).
次に弁６（または９）及び弁８ （また（ま１１）を閉
じ、弁７（または１０）を開けて吸着塔３（または４）
内のガスを配管１５を経由して大気に放出させて塔内の
圧力を脱着圧力まで減少させて吸着剤を＋Ｉｒ生ずる。Next, close valve 6 (or 9) and valve 8 (also (or 11), open valve 7 (or 10), and open adsorption tower 3 (or 4).
The gas inside the column is released to the atmosphere via the pipe 15, and the pressure inside the column is reduced to the desorption pressure, producing an adsorbent of +Ir.
（以下脱着工程と称する）。次に、弁７ （または１０
）を閉じ、弁６ （または９）を開けて配管Ｊ３からの
加圧空気を吸着塔３（または４）に送って塔内を昇圧す
る（以下加圧上程と称する）。上記３工程のうち１塔で
吸着工程を、他塔で残り２−１−程を実施させ５両塔を
交互に切替えることにより、連続的に窒素富化空気を発
生させる。気密貯蔵袋１６への窒素富化空気の供給にと
もなって、気密貯蔵袋１６内のガスの一部を弁１９を開
けて大気に放出する。酸素センサー２１で酸素濃度を検
出し、この信シ）を調節器２２を経由して圧縮器２に伝
えて起−動、または停止１−を行なわせることにより酸
素濃度を所定の範囲に調節できる。(hereinafter referred to as the desorption process). Next, valve 7 (or 10
) and open valve 6 (or 9) to send pressurized air from pipe J3 to adsorption tower 3 (or 4) to increase the pressure inside the tower (hereinafter referred to as the pressurization step). Of the three steps mentioned above, one tower performs the adsorption step and the other tower performs the remaining 2-1 steps, and the five towers are alternately switched to continuously generate nitrogen-enriched air. As nitrogen-enriched air is supplied to the airtight storage bag 16, a portion of the gas in the airtight storage bag 16 is released to the atmosphere by opening the valve 19. The oxygen concentration can be adjusted within a predetermined range by detecting the oxygen concentration with the oxygen sensor 21 and transmitting this signal to the compressor 2 via the regulator 22 to start or stop the compressor 2. .
このように、従来の液体窒素を使用する設備に比べて、
きわめて簡単な装置で、しかも雰囲気量を最少にした状
態で窒素富化空気の酸素濃度を調節でき管理コストが安
くなる長所がある。また、Ｎ２ＰＳＡ装置１基で数多く
の気密貯蔵袋内の雰囲気調節もできる。さらに、穀物、
果物等季節や地域を問わず汎用利用ができる利点がある
。In this way, compared to equipment that uses conventional liquid nitrogen,
It is an extremely simple device, and has the advantage of being able to adjust the oxygen concentration of nitrogen-enriched air while minimizing the amount of atmosphere, resulting in low management costs. Furthermore, the atmosphere inside many airtight storage bags can be adjusted with one N2PSA device. In addition, grains,
It has the advantage that it can be used for general purposes such as fruits, regardless of season or region.
なお、気密貯蔵袋を例にしたのは、調籍雰囲気量を最少
にし、運転コストを安くするためであり、一般の合圧、
固バａ容器等にも適＋１］できる。The reason for using an airtight storage bag as an example is to minimize the amount of prepared atmosphere and reduce operating costs.
Suitable for solid bar containers, etc.+1].
本発明によれば、液体窒素等を使用することなく、窒素
富化空気の酸素濃度を調節できるので、簡易に、管理コ
ストも安（、手軽に長期貯蔵が可能になる効果がある。According to the present invention, the oxygen concentration of nitrogen-enriched air can be adjusted without using liquid nitrogen or the like, so that the management cost is low (and long-term storage is easily possible).
第１図はＮ２ＰＳＡ装置における吸着圧力と窒素富化空
気中の酸素濃度の関係の一例を示す図、第２図は本発明
の一実施例を示す概略図である。
］・・Ｎ２ＰＳＡ装置、２・−・圧縮機、３．４・・・
吸着塔、１６・・・気密貯蔵袋、２１・・・酸素センサ
ー、２２−・・調節器。FIG. 1 is a diagram showing an example of the relationship between adsorption pressure in a N2PSA apparatus and oxygen concentration in nitrogen-enriched air, and FIG. 2 is a schematic diagram showing an embodiment of the present invention. ]... N2PSA device, 2... Compressor, 3.4...
Adsorption tower, 16--airtight storage bag, 21--oxygen sensor, 22--regulator.
Claims (1)
後。 圧力差吸着装置で製造した窒素富化カスを封入してなる
貯蔵庫の雰囲気調整方法。 ２ ］項において複数の袋等を集中させておき、順次圧
力差吸着装置を接続し窒素富化ガスを封入してなる貯蔵
庫の雰囲気調整方法。[Claims] 1. After reducing the pressure with the air compressor of the JIE force differential adsorption device. A method for adjusting the atmosphere in a storage chamber by enclosing nitrogen-enriched scum produced by a pressure difference adsorption device. 2) A storage atmosphere adjustment method in which a plurality of bags, etc. are concentrated, sequentially connected to a pressure difference adsorption device, and filled with nitrogen-enriched gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8571983A JPS59212670A (en) | 1983-05-18 | 1983-05-18 | How to adjust the atmosphere in a storage room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8571983A JPS59212670A (en) | 1983-05-18 | 1983-05-18 | How to adjust the atmosphere in a storage room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59212670A true JPS59212670A (en) | 1984-12-01 |
Family
ID=13866642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8571983A Pending JPS59212670A (en) | 1983-05-18 | 1983-05-18 | How to adjust the atmosphere in a storage room |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59212670A (en) |
-
1983
- 1983-05-18 JP JP8571983A patent/JPS59212670A/en active Pending
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