JP6712200B2 - Slurry ice manufacturing method - Google Patents
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- JP6712200B2 JP6712200B2 JP2016164613A JP2016164613A JP6712200B2 JP 6712200 B2 JP6712200 B2 JP 6712200B2 JP 2016164613 A JP2016164613 A JP 2016164613A JP 2016164613 A JP2016164613 A JP 2016164613A JP 6712200 B2 JP6712200 B2 JP 6712200B2
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- liquefied gas
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- slurry ice
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- 239000002002 slurry Substances 0.000 title claims description 82
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 239000007788 liquid Substances 0.000 claims description 126
- 239000007789 gas Substances 0.000 claims description 53
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 230000005484 gravity Effects 0.000 claims description 13
- 238000007710 freezing Methods 0.000 claims description 12
- 230000008014 freezing Effects 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 239000013535 sea water Substances 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052743 krypton Inorganic materials 0.000 claims description 3
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052754 neon Inorganic materials 0.000 claims description 3
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 239000008399 tap water Substances 0.000 description 41
- 235000020679 tap water Nutrition 0.000 description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 22
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 239000002826 coolant Substances 0.000 description 10
- 229910001882 dioxygen Inorganic materials 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 235000013311 vegetables Nutrition 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Freezing, Cooling And Drying Of Foods (AREA)
Description
本発明は、スラリー状に凍結したスラリーアイスを製造するスラリーアイス製造方法に関する。 The present invention relates to a slurry ice manufacturing method for manufacturing slurry ice frozen in a slurry form.
近年、いくつかのスラリーアイスの製造方法が示されている。
例えば、特許文献１には、液体と低温冷媒を二重配管の金属管壁を介して熱交換し、その管壁に付着した氷をスクレーパ（またはスクレバー等、複数の表現がある）によって掻き取る製氷方法が開示されている。
また、特許文献２には、容器内に被冷却媒体を封入するとともに冷却媒体を流通させる冷却媒体流路を設け、前記被冷却媒体内に複数の小物体を封入して該被冷却媒体を流動攪拌させて前記小物体を前記冷却媒体流路の表面に衝突させることにより、前記冷却媒体流路の表面に付着した氷をかきとってスラリーアイスを生成する方法が開示されている。
Recently, several methods of making slurry ice have been shown.
For example, in Patent Document 1, a liquid and a low-temperature refrigerant are heat-exchanged through a metal pipe wall of a double pipe, and ice adhering to the pipe wall is scraped by a scraper (or a scrubber or the like, which has a plurality of expressions). An ice making method is disclosed.
Further, in Patent Document 2, a cooling medium flow path is provided in which a cooling medium is sealed and a cooling medium is circulated in a container, and a plurality of small objects are sealed in the cooling medium to flow the cooling medium. A method is disclosed in which the small objects are agitated to collide with the surface of the cooling medium passage to scrape off the ice adhering to the surface of the cooling medium passage to generate slurry ice.
さらに、特許文献３及び４には、器（うつわ）内の液体を過冷却状態とし、それを解除してスラリーアイスを製造する製氷方法が開示されている。 Further, Patent Documents 3 and 4 disclose an ice making method in which a liquid in a vessel is put in a supercooled state and is released to produce slurry ice.
一方、氷による鮮魚や野菜等の鮮度保持に関して、特許文献５には窒素氷を用いる方法や、引用文献６にはオゾン含有氷を用いる方法が開示されている。
また、氷を使用した殺菌に関しては、特許文献７及び８に開示されている電解水氷を用いる方法や、特許文献９に開示されている海水氷を用いる方法が挙げられる。これらの方法はいずれも、氷塊を造るものであるが、スラリー状のアイスを製造するものであるとは示されていない。
On the other hand, as for keeping freshness of fresh fish, vegetables and the like with ice, Patent Document 5 discloses a method using nitrogen ice, and Patent Document 6 discloses a method using ozone-containing ice.
As for sterilization using ice, there are a method using electrolytic water ice disclosed in Patent Documents 7 and 8 and a method using seawater ice disclosed in Patent Document 9. None of these methods produce ice masses, but have not been shown to produce slurry ice.
特許文献１に開示されている技術においては、スラリーアイスを製造する装置において被凍結液体の凍結による固着や閉塞等に弱い摺動部や回転部が存在したり、また、被凍結液体を間接的に凍結する場合には、非常に硬く薄く固着した氷を掻き取っているため効率的なスラリーアイスの製造とは言い難かった。
また、特許文献２に開示されている技術においては、スクレーパを用いることなく冷却媒体流路の表面に付着した氷を掻きとることができるが、被冷却媒体の流動攪拌を制御し、被冷却媒体に封入した小物体を被冷却媒体の表面に効率良く衝突させることが困難であった。
In the technique disclosed in Patent Document 1, a device for producing slurry ice has a sliding part or a rotating part which is weak against sticking or blockage due to freezing of the liquid to be frozen, and the liquid to be frozen is indirectly In the case of freezing, it was difficult to say that it was an efficient production of slurry ice because the very hard, thin and fixed ice was scraped off.
Further, in the technique disclosed in Patent Document 2, the ice adhering to the surface of the cooling medium flow path can be scraped off without using a scraper, but the flow stirring of the cooling medium is controlled to control the cooling medium. It was difficult to cause the small object enclosed in the above to efficiently collide with the surface of the medium to be cooled.
さらに、特許文献３及び４に開示されている技術においては、被凍結液体を静置し、時間をかけて過冷却状態とするため、僅かな振動を与えただけでその過冷却状態が解除されてしまう等、過冷却状態を安定的に発生させることが難しく、例えば、過冷却水中で生成したスラリーアイスを掻き出そうとしただけで被凍結液体の全てが凍結して氷塊となってしまう問題があった。
よって、これまでの従来技術は、効率的かつ安定してスラリーアイスを製造するためには不完全なものであった。
Further, in the techniques disclosed in Patent Documents 3 and 4, since the liquid to be frozen is allowed to stand and is brought into a supercooled state over time, the supercooled state is released by applying a slight vibration. It is difficult to generate a supercooled state in a stable manner, for example, the problem that all of the frozen liquid freezes and becomes an ice block just by trying to scrape out the slurry ice generated in the supercooled water. was there.
Therefore, the conventional techniques so far have been incomplete for efficiently and stably producing slurry ice.
本発明は、上記のような課題を解決するためになされたものであり、効率的かつ安定してスラリーアイスを製造することができるスラリーアイス製造方法を提供することを目的とする。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a slurry ice manufacturing method capable of manufacturing slurry ice efficiently and stably.
（１）本発明に係るスラリーアイス製造方法は、被凍結液体をスラリー状に凍結させてスラリーアイスを製造するものであって、液化ガス供給源から供給された液化ガスを、容器に貯留された前記被凍結液体の液面の上方から前記液面に噴射させ、該噴射した液化ガスが前記被凍結液体中で浮沈及び揺動して該被凍結液体をスラリー状に凍結させることを特徴とするものである。 (1) A method for producing slurry ice according to the present invention is to produce a slurry ice by freezing a liquid to be frozen into a slurry state, and a liquefied gas supplied from a liquefied gas supply source is stored in a container. It is characterized in that the liquid to be frozen is jetted from above the liquid surface to the liquid surface, and the jetted liquefied gas floats and floats in the liquid to be frozen and rocks to freeze the liquid to be frozen into a slurry form. It is a thing.
（２）上記（１）に記載のものにおいて、前記液化ガス供給源から供給される液化ガスを気液分離器により気液分離し、液体状態の液化ガスを前記液面に噴射させることを特徴とするものである。 (2) In the above (1), the liquefied gas supplied from the liquefied gas supply source is gas-liquid separated by a gas-liquid separator, and the liquefied gas in a liquid state is injected onto the liquid surface. It is what
（３）上記（１）又は（２）に記載のものにおいて、前記液化ガスは、前記被凍結液体よりも比重の大きいものであることを特徴とするものである。 (3) In the above (1) or (2), the liquefied gas has a larger specific gravity than the liquid to be frozen.
（４）上記（３）に記載のものにおいて、前記被凍結液体は、水、塩水、海水又は電解水であり、前記液化ガスは、液体酸素、液体アルゴン、液体ネオン、液体クリプトン又は液体キセノンであることを特徴とするものである。 (4) In those described in the above (3), wherein the freezing liquid is water, brine, a seawater or electrolytic water, wherein the liquefied gas is liquid oxygen, liquid body argon, liquid neon, liquid krypton or liquid xenon It is characterized by being.
（５）上記（１）又は（２）に記載のものにおいて、前記液化ガスは、被凍結液体よりも比重の小さいものであり、前記液化ガスを前記被凍結液体の液中深く到達するように噴射させることによって、前記被凍結液体の液面を板状に凍らせないようにしたことを特徴とするものである。 (5) In the above (1) or (2), the liquefied gas has a specific gravity smaller than that of the liquid to be frozen, and the liquefied gas reaches deep inside the liquid to be frozen. By spraying, the liquid surface of the liquid to be frozen is prevented from freezing into a plate shape.
（６）上記（１）乃至（５）のいずれかに記載のものにおいて、前記容器に被凍結液体を供給しながら該被凍結液体をスラリー状に凍結させ、該スラリー状に凍結したスラリーアイスを掻き出してスラリーアイスを連続的に製造することを特徴とするものである。 (6) In the device described in any one of (1) to (5) above, while the liquid to be frozen is supplied to the container, the liquid to be frozen is frozen in a slurry form, and slurry ice frozen in the slurry form is used. It is characterized by continuously scraping and producing slurry ice.
本発明に係るスラリーアイス製造方法においては、液化ガス供給源から供給された液化ガスを、容器に貯留された前記被凍結液体の液面の上方から前記液面に向けて噴射させ、該噴射した液化ガスが前記被凍結液体中で浮沈及び揺動して該被凍結液体をスラリー状に凍結させるようにしたので、効率的かつ安定してスラリーアイスを製造することができる。 In the slurry ice manufacturing method according to the present invention, the liquefied gas supplied from the liquefied gas supply source is jetted from above the liquid surface of the frozen liquid stored in the container toward the liquid surface, and the jetted Since the liquefied gas floats and sinks and rocks in the liquid to be frozen to freeze the liquid to be frozen into a slurry, it is possible to efficiently and stably produce the slurry ice.
本発明の実施の形態に係るスラリーアイス製造方法は、被凍結液体をスラリー状に凍結させてスラリーアイスを製造するものであって、図１に例示するようなスラリーアイス製造装置１を用いて、超低温液化ガス容器３から供給された液体酸素Ｌを、容器５に貯留された水道水Ｗの液面の上方に設置したノズル７を介して前記液面に向けて噴射させ、該噴射した液体酸素Ｌが水道水Ｗ中で浮沈および揺動して水道水Ｗをスラリー状に凍結させるものである。
以下、図１に基づいて、本実施の形態に係るスラリーアイス製造方法を詳細に説明する。
A slurry ice manufacturing method according to an embodiment of the present invention is a method for manufacturing a slurry ice by freezing a liquid to be frozen into a slurry form, and using a slurry ice manufacturing apparatus 1 as illustrated in FIG. The liquid oxygen L supplied from the ultra-low temperature liquefied gas container 3 is jetted toward the liquid surface through a nozzle 7 installed above the liquid surface of the tap water W stored in the container 5, and the jetted liquid oxygen L floats, sinks and rocks in the tap water W to freeze the tap water W in a slurry state.
Hereinafter, the method for producing slurry ice according to the present embodiment will be described in detail with reference to FIG.
まず、容器５内に被凍結液体として水道水Ｗを貯留する。
本実施の形態において、容器５は、SUS304製、内径φ395mm、高さ350mmの円筒形状である。また、被凍結液体として水道水Ｗ（比重1）を使用しているが、被凍結液体には、例えば、溶存酸素濃度の高い水（比重1）、塩水や海水（比重1.023乃至1.025）、電解水（比重1、pH4.5乃至6.8）を使用することができる。
First, tap water W is stored in the container 5 as a liquid to be frozen.
In the present embodiment, the container 5 is made of SUS304 and has a cylindrical shape with an inner diameter of 395 mm and a height of 350 mm. Although tap water W (specific gravity 1) is used as the liquid to be frozen, the liquid to be frozen may be, for example, water with a high dissolved oxygen concentration (specific gravity 1), salt water or seawater (specific gravity 1.023 to 1.025), electrolysis. Water (specific gravity 1, pH 4.5 to 6.8) can be used.
低温液化ガス供給源である超低温液化ガス容器３は、液化ガスとして液体酸素Ｌ（比重1.141）を貯蔵し、超低温液化ガス容器３とノズル７との間には気液分離器１３が設置され、気液分離器１３と超低温液化ガス容器３との間、及び、気液分離器１３とノズル７との間には配管１１が配設されている。
液化ガスは、被凍結液体の種類や比重によって適宜変更することができ、液体酸素Ｌの他には、液体窒素、液体アルゴン、液体ネオン、液体クリプトン、液体キセノンを使用できる。
The ultra-low temperature liquefied gas container 3 which is a low-temperature liquefied gas supply source stores liquid oxygen L (specific gravity 1.141) as a liquefied gas, and a gas-liquid separator 13 is installed between the ultra-low temperature liquefied gas container 3 and the nozzle 7. Pipes 11 are arranged between the gas-liquid separator 13 and the ultra-low temperature liquefied gas container 3 and between the gas-liquid separator 13 and the nozzle 7.
The liquefied gas can be appropriately changed according to the type and specific gravity of the liquid to be frozen, and in addition to liquid oxygen L, liquid nitrogen, liquid argon, liquid neon, liquid krypton, and liquid xenon can be used.
そして、超低温液化ガス容器３に設けられているストップ弁９を開き、超低温液化ガス容器３に貯蔵されている液体酸素Ｌを配管１１を介して気液分離器１３に供給する。
気液分離器１３及び配管１１では、これら自体がもつ熱や外部からの熱侵入等により液体酸素Ｌの一部は気化する。そこで、気化した気体状態の液体酸素（酸素ガスＧ）を、気体放出用電磁弁１５から放出させながら、液体状態の液体酸素Ｌを気液分離器１３に貯留する。
このとき、気化した酸素ガスＧの放出は、気液分離器１３に設置した差圧式液面コントローラー１７により制御する。
Then, the stop valve 9 provided in the ultra-low temperature liquefied gas container 3 is opened, and the liquid oxygen L stored in the ultra-low temperature liquefied gas container 3 is supplied to the gas-liquid separator 13 via the pipe 11.
In the gas-liquid separator 13 and the pipe 11, a part of the liquid oxygen L is vaporized due to the heat of itself and the invasion of heat from the outside. Therefore, the liquid oxygen L in the liquid state is stored in the gas-liquid separator 13 while releasing the vaporized liquid oxygen in the gas state (oxygen gas G) from the gas releasing electromagnetic valve 15.
At this time, the release of the vaporized oxygen gas G is controlled by the differential pressure type liquid level controller 17 installed in the gas-liquid separator 13.
本実施の形態において、気液分離器１３にはSUS304製、50Aの管を螺旋状に形成したものを使用したが、本発明に係る気液分離器には、単なるタンク形状のものやバッファタンクを使用してもよい。 In the present embodiment, the gas-liquid separator 13 is made of SUS304 and has a tube of 50A formed in a spiral shape. However, the gas-liquid separator according to the present invention has a simple tank shape or a buffer tank. May be used.
気液分離器１３に液体状態の液体酸素Ｌが十分に貯留されたら、気液分離器１３よりも下流側の配管１１に設けられた長軸弁１９を開き、液体状態の液体酸素Ｌを容器５に供給し、ノズル７を介して水道水Ｗの液面に向けて噴射させる。本実施の形態において、液体酸素は、およそ0.5kg/minで供給した。配管１１には、外径が1/2インチ、肉厚0.89mmのSUS304BA管を用いた。
液体酸素Ｌは、容器５の上方に配管１１の管端部を配置し、該管端部を介して水道水Ｗの液面に向けて噴射させてもよい。
When the liquid oxygen L in the liquid state is sufficiently stored in the gas-liquid separator 13, the long shaft valve 19 provided in the pipe 11 on the downstream side of the gas-liquid separator 13 is opened to store the liquid oxygen L in the liquid container. 5, and sprays it toward the liquid surface of the tap water W through the nozzle 7. In the present embodiment, liquid oxygen was supplied at about 0.5 kg/min. As the pipe 11, a SUS304BA pipe having an outer diameter of 1/2 inch and a wall thickness of 0.89 mm was used.
The liquid oxygen L may be arranged such that the pipe end portion of the pipe 11 is arranged above the container 5 and the liquid oxygen L is jetted toward the liquid surface of the tap water W via the pipe end portion.
容器５内では、水道水Ｗと液体酸素Ｌが混合した状態となるが、液体酸素Ｌは、水道水Ｗよりも比重が大きいので、液体酸素Ｌ自身の界面張力で略球形の滴状になりながら、容器５の底部に向かって沈降する。 In the container 5, the tap water W and the liquid oxygen L are mixed, but since the liquid oxygen L has a larger specific gravity than the tap water W, the interfacial tension of the liquid oxygen L itself causes a substantially spherical drop shape. Meanwhile, it settles toward the bottom of the container 5.
しかし、略球形となった液体酸素Ｌは、水中で沈降する途中で水道水Ｗが持つ熱によって表面から気化し、気化した酸素ガスが略球形の液体酸素を包み込む。
そして、気化した酸素ガスに作用する浮力により、液体酸素Ｌは水道水Ｗの液面まで浮上する。浮上すると、略球形の液体酸素Ｌを包み込んでいた酸素ガスは大気中に放出されるため、液体酸素Ｌは水との比重の違いにより、再度、自身の界面張力で略球形になりながら沈降してゆく。
However, the substantially spherical liquid oxygen L is vaporized from the surface by the heat of the tap water W while it is settling in water, and the vaporized oxygen gas wraps the substantially spherical liquid oxygen.
Then, due to the buoyancy acting on the vaporized oxygen gas, the liquid oxygen L floats up to the liquid surface of the tap water W. When floating, the oxygen gas enclosing the substantially spherical liquid oxygen L is released into the atmosphere, and due to the difference in specific gravity with water, the liquid oxygen L settles again while becoming substantially spherical due to its own interfacial tension. Go on.
さらに、水中において液体酸素Ｌはその表面から気化することにより浮力が生じて揺動する。このように、水道水Ｗに噴射した液体酸素Ｌは、水中での気化と液面での酸素ガスの放出により、水中において浮沈と揺動を繰り返す。 Further, the liquid oxygen L in water is evaporated from its surface to generate buoyancy and rock. As described above, the liquid oxygen L jetted into the tap water W repeatedly floats and sinks and rocks in water due to vaporization in water and release of oxygen gas at the liquid surface.
ここで、水道水Ｗをスラリー状に凍結させるためには、容器５に貯留した水道水Ｗの温度、接触時間、液体酸素Ｌの噴射量を制御する必要がある。
水道水Ｗの温度は、温度計２３による測定値に基づいて制御することができる。また、接触時間は、水道水Ｗの温度と液体酸素Ｌの噴射量により制御することができる。さらに、液体酸素Ｌの噴射量の制御に関しては、液体酸素Ｌと酸素ガスＧとが混合した気液混合液体では制御が難しかったが、気液分離器１３を使用して液体状態の液体酸素Ｌを噴射させることにより一定に安定させることができる。
Here, in order to freeze the tap water W into a slurry state, it is necessary to control the temperature of the tap water W stored in the container 5, the contact time, and the injection amount of the liquid oxygen L.
The temperature of the tap water W can be controlled based on the value measured by the thermometer 23. Moreover, the contact time can be controlled by the temperature of the tap water W and the injection amount of the liquid oxygen L. Further, regarding the control of the injection amount of the liquid oxygen L, it was difficult to control with the gas-liquid mixed liquid in which the liquid oxygen L and the oxygen gas G are mixed, but the liquid oxygen L in the liquid state is used by using the gas-liquid separator 13. Can be stabilized at a constant level.
そして、水中において複数の略球形の液体酸素Ｌが揺動しながら浮上と沈降を何度も繰り返すうちに、水道水Ｗは、図２に示すように、その液面から約80mmが白濁し、スラリー状に凍結したスラリーアイスが製造される。本実施の形態では液体酸素Ｌを使用して水道水Ｗを凍結させているため、水道水Ｗは、該液化ガスにより低温にすることができ、かつ、揺動も加わって、溶存酸素量を増加させることができ、その結果、酸素リッチなスラリーアイスが製造される。
なお、スラリーアイスの完成は、目視で容易に確認することができる。
Then, while a plurality of substantially spherical liquid oxygen L oscillates repeatedly in water, the tap water W becomes cloudy about 80 mm from its liquid surface as shown in FIG. Slurry ice frozen into a slurry is produced. In the present embodiment, since the tap water W is frozen by using the liquid oxygen L, the tap water W can be made to have a low temperature by the liquefied gas, and the fluctuation is also added to increase the dissolved oxygen amount. Can be increased, resulting in the production of oxygen-rich slurry ice.
The completion of the slurry ice can be visually confirmed easily.
以上、本実施の形態に係るスラリーアイス製造方法によれば、図１に示すスラリーアイス製造装置１を用い、被凍結液体（水道水Ｗ）を貯留するための容器５と、被凍結液体を凍結させる液化ガス（液体酸素Ｌ）と、該液化ガスを容器５に供給する配管１１と、配管１１に設けられて液化ガスの供給を制御する長軸弁１９と、好ましくは、配管１１に気液分離器１３を供えた極めた簡素な装置構成により、スラリーアイスを安定かつ効率的に製造することができる。 As described above, according to the method for manufacturing slurry ice according to the present embodiment, the container 5 for storing the liquid to be frozen (tap water W) and the liquid to be frozen are frozen by using the slurry ice manufacturing apparatus 1 shown in FIG. A liquefied gas (liquid oxygen L) to be caused to flow, a pipe 11 for supplying the liquefied gas to the container 5, a long axis valve 19 provided in the pipe 11 for controlling the supply of the liquefied gas, and preferably gas-liquid Slurry ice can be stably and efficiently manufactured by the extremely simple device configuration provided with the separator 13.
そして、本発明に係るスラリーアイス製造方法により製造したスラリーアイスを用いることで、生鮮食品の鮮度保持が簡単になり、かつコストも極めて安価に抑えることができる。 Then, by using the slurry ice produced by the method for producing slurry ice according to the present invention, the freshness of fresh food can be easily maintained and the cost can be kept extremely low.
さらに、本発明に係るスラリーアイス製造方法は、液化ガスに液体酸素を用いることで、溶存酸素濃度の高い水、塩水、海水、電解水を簡便にスラリー状に凍結させることが可能であり、また、液化ガスに液体窒素を用いれば、溶存酸素濃度の低いスラリーアイスを製造することができ、これらの効果によって、鮮魚、野菜、カット野菜、乃至は、これらの食品における鮮度を保つことに使用可能なスラリーアイスを提供することができる。 Furthermore, the method for producing slurry ice according to the present invention, by using liquid oxygen as a liquefied gas, it is possible to simply freeze water having a high dissolved oxygen concentration, salt water, seawater, and electrolyzed water in a slurry form, and By using liquid nitrogen as the liquefied gas, it is possible to produce slurry ice with a low dissolved oxygen concentration. Due to these effects, it can be used to maintain the freshness of fresh fish, vegetables, cut vegetables, or these foods. Slurry ice can be provided.
なお、容器５に圧力計２１を設置して被凍結液体中の圧力変化を常時測定し、過度の凍結防止や氷塊化してしまうことを防止することができる。
または、容器５の底近傍まで達する圧力解放管を設置し、万が一、被凍結液体の液面が板状に凍結して液体酸素Ｌが閉じ込められても、圧力解放管を介して液面下に閉じ込められて気化した酸素ガスを放出し、圧力を解放するようにしても良い。
同様に、容器５に温度計２３を設置して液中の温度を常時測定し、氷塊化を防止してもよい。
A pressure gauge 21 can be installed in the container 5 to constantly measure the pressure change in the liquid to be frozen, thereby preventing excessive freezing and preventing ice clumping.
Alternatively, if a pressure release pipe that reaches the vicinity of the bottom of the container 5 is installed, and even if the liquid surface of the liquid to be frozen freezes in a plate shape and the liquid oxygen L is confined, the pressure release pipe is provided below the liquid surface. The pressure may be released by releasing the oxygen gas that is trapped and vaporized.
Similarly, a thermometer 23 may be installed in the container 5 to constantly measure the temperature in the liquid to prevent ice agglomeration.
また、上記の説明は、液化ガスとして液体酸素を使用したものであるが、液化ガスの性状を優先して、液体酸素以外の液化ガスを用いることができる。ただし、例えば、水道水よりも比重の小さな液体窒素を使用し、容器に貯留した水道水の液面に液体窒素を噴射させると、液面に液体窒素が浮いたままの状態となってしまい、水道水の液面だけが板状に凍ってしまうため、効率的なスラリーアイスの製造が困難になるおそれがある。 In the above description, liquid oxygen is used as the liquefied gas, but liquefied gas other than liquid oxygen can be used by giving priority to the property of the liquefied gas. However, for example, when liquid nitrogen having a smaller specific gravity than tap water is used and the liquid nitrogen is sprayed on the liquid surface of the tap water stored in the container, the liquid nitrogen remains floating on the liquid surface, Since only the liquid surface of the tap water freezes like a plate, there is a possibility that efficient production of slurry ice may become difficult.
このような場合、液体窒素を水道水の液面の上方から勢いよく噴射させ、該噴射した液体窒素を水道水中深く到達するように導入し、該導入した液体窒素を該水道水の持つ熱によって気化させて該水道水中を揺動しながら浮上させることにより、前記水道水を攪拌することができる。その結果、液体酸素を使用した場合と同様、水道水の液面だけが板状に凍ることなく、該水道水の液面付近が白濁し、スラリー状に凍結したスラリーアイスが製造させることができる。
若しくは、容器内において水道水を攪拌するための攪拌機を導入し、水道水と液体窒素を強制的に混合させることによっても、水道水をスラリー状に凍結させることができる。
In such a case, liquid nitrogen is vigorously jetted from above the liquid surface of tap water, the jetted liquid nitrogen is introduced so as to reach deeply in tap water, and the introduced liquid nitrogen is heated by the heat of the tap water. The tap water can be agitated by being vaporized and floating in the tap water while rocking. As a result, similarly to the case of using liquid oxygen, only the liquid surface of tap water does not freeze like a plate, the vicinity of the liquid surface of tap water becomes cloudy, and slurry ice frozen in a slurry form can be produced. ..
Alternatively, the tap water can be frozen in a slurry state by introducing a stirrer for stirring the tap water in the container and forcibly mixing the tap water and the liquid nitrogen.
なお、上記の説明は、水道水の液面に向けてノズル又は配管の管端部を設置し、該ノズル又は管端部を介して液体酸素や液体窒素などの液化ガスを水道水の液面に向けて噴射させるものであったが、ノズル又は管端部から噴射させた液化ガスを水道水中に導入又は深く到達するように導入させるものであれば、ノズル又は配管の管端部を水道水の液面に向けていないものであっても良い。 In the above description, the nozzle or the pipe end portion of the pipe is installed toward the liquid surface of the tap water, and the liquefied gas such as liquid oxygen or liquid nitrogen is passed through the nozzle or the pipe end portion to the liquid surface of the tap water. Although it was intended to inject toward the liquor, if the liquefied gas injected from the nozzle or the pipe end is introduced into the tap water or introduced so as to reach deeply, the pipe end of the nozzle or the pipe is tap water. It may not be directed to the liquid surface of.
さらに、上記の説明は、バッチ式にスラリーアイスを製造するものであったが、例えば、図３及び４に示すように、水道水を容器２７に供給しながら液体酸素等の液化ガスを供給して水道水Ｗをスラリー状に凍結させ、該スラリー状に凍結したスラリーアイスＳを掻取具２５により掻き取って容器２７から取り出すことにより、スラリーアイスＳを連続的に製造することができる。なお、掻取具２５は、例えば底面がメッシュ状になったシャベル形状のものを用い、液面から深さ方向に80mm程度差し込むようにすればよい。 Further, although the above description is for manufacturing the slurry ice in a batch process, for example, as shown in FIGS. 3 and 4, while supplying tap water to the container 27, a liquefied gas such as liquid oxygen is supplied. Slurry ice S can be continuously manufactured by freezing the tap water W into a slurry and scraping the slurry ice S frozen in the slurry with the scraping tool 25 and taking it out from the container 27. As the scraping tool 25, for example, a shovel having a mesh bottom surface may be used, and the scraping tool 25 may be inserted about 80 mm in the depth direction from the liquid surface.
容器２７内で凍結したスラリーアイスＳを掻き取りやすくするため、図３及び４に示すように、水道水を貯留する容器２７は、円筒ではなく立方体又は直方体とし、掻き取ったスラリーアイスＳを取り出す取出口２９を設けることが好ましい。 In order to easily scrape the frozen slurry ice S in the container 27, as shown in FIGS. 3 and 4, the container 27 for storing tap water is not a cylinder but a cube or a rectangular parallelepiped, and the scraped slurry ice S is taken out. It is preferable to provide an outlet 29.
バッチ式にスラリーアイスを製造する場合、被凍結液体と液化ガスの接触時間や液化ガスの噴射量を最適な条件に設定しても、被凍結液体の冷却が過度に進行して、スラリー状態を越えて氷塊状又は板状凍結に近い状態になってしまうことがある。図３及び４に示すように、被凍結液体を供給しながらスラリーアイスＳを掻き取って連続的に製造する場合、容器５への侵入熱や気温、供給する被凍結液体の液温がほぼ一定であれば、液化ガスとの接触時間や液化ガスの噴射量を最適値に設定して生成したスラリーアイスＳを掻き取ることによって被凍結液体が過度に冷却するのを防ぐことができ、比較的広い範囲での条件設定が可能になる。 When producing slurry ice in a batch system, even if the contact time between the liquid to be frozen and the liquefied gas and the injection amount of the liquefied gas are set to the optimum conditions, cooling of the liquid to be frozen will proceed excessively and the slurry state will be changed. It may exceed the state of ice block or plate freezing. As shown in FIGS. 3 and 4, when the slurry ice S is scraped and continuously produced while supplying the liquid to be frozen, the heat entering the container 5, the air temperature, and the liquid temperature of the liquid to be frozen to be supplied are substantially constant. In this case, it is possible to prevent the liquid to be frozen from being excessively cooled by scraping the slurry ice S generated by setting the contact time with the liquefied gas and the injection amount of the liquefied gas to the optimum values, A wide range of conditions can be set.
なお、各種液化ガスを使用する際には、酸素濃度計の設置及び充分な換気により、作業者の安全を確保する必要があることは、言うまでもない。 Needless to say, when using various liquefied gases, it is necessary to ensure the safety of workers by installing an oxygen concentration meter and adequate ventilation.
１ スラリーアイス製造装置
３ 超低温液化ガス容器
５ 容器
７ ノズル
９ ストップ弁
１１ 配管
１３ 気液分離器
１５ 気体放出用電磁弁
１７ 差圧式液面コントローラー
１９ 長軸弁
２１ 圧力計
２３ 温度計
２５ 掻取具
２７ 容器
２９ 取出口
Ｇ 酸素ガス
Ｌ 液体酸素
Ｓ スラリーアイス
Ｗ 水道水
1 Slurry Ice Manufacturing Device 3 Ultra Low Temperature Liquefied Gas Container 5 Container 7 Nozzle 9 Stop Valve 11 Piping 13 Gas-Liquid Separator 15 Gas Release Solenoid Valve 17 Differential Pressure Type Liquid Level Controller 19 Long Shaft Valve 21 Pressure Gauge 23 Thermometer 25 Scraping Tool 27 container 29 outlet G oxygen gas L liquid oxygen S slurry ice W tap water
Claims (6)
液化ガス供給源から供給された液化ガスを、容器に貯留された前記被凍結液体の液面の上方から前記液面に噴射させ、該噴射した液化ガスが前記被凍結液体中で浮沈及び揺動して該被凍結液体をスラリー状に凍結させることを特徴とするスラリーアイス製造方法。 A slurry ice manufacturing method for manufacturing slurry ice by freezing a liquid to be frozen into a slurry form,
A liquefied gas supplied from a liquefied gas supply source is jetted onto the liquid surface from above the liquid surface of the liquid to be frozen stored in a container, and the jetted liquefied gas floats and sways in the liquid to be frozen. And then freezing the liquid to be frozen into a slurry form.
前記液化ガスは、液体酸素、液体アルゴン、液体ネオン、液体クリプトン又は液体キセノンであることを特徴とする請求項３に記載のスラリーアイス製造方法。 The liquid to be frozen is water, salt water, seawater or electrolyzed water,
The liquefied gas, the slurry ice manufacturing method according to claim 3, characterized in that liquid oxygen, liquid body argon, liquid neon, liquid krypton or liquid xenon.
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