JPH05337287A - Safe operation control method for dry cleaning machine using combustible solvent - Google Patents
Safe operation control method for dry cleaning machine using combustible solventInfo
- Publication number
- JPH05337287A JPH05337287A JP4152031A JP15203192A JPH05337287A JP H05337287 A JPH05337287 A JP H05337287A JP 4152031 A JP4152031 A JP 4152031A JP 15203192 A JP15203192 A JP 15203192A JP H05337287 A JPH05337287 A JP H05337287A
- Authority
- JP
- Japan
- Prior art keywords
- nitrogen gas
- dry cleaning
- cleaning machine
- oxygen concentration
- gas tank
- 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.)
- Granted
Links
- 238000005108 dry cleaning Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 8
- 239000002904 solvent Substances 0.000 title claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 72
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 abstract description 10
- 239000002184 metal Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ドライクリーニング機
の洗浄・乾燥系内に窒素ガスを導入して、可燃性溶剤使
用による爆発の危険をなくしたドライクリーニング機に
おける安全運転制御方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safe operation control method in a dry cleaning machine in which nitrogen gas is introduced into the cleaning / drying system of the dry cleaning machine to eliminate the risk of explosion caused by the use of a flammable solvent. is there.
【０００２】[0002]
【従来の技術】ドライクリーニングにおいては、公害防
止のために石油系溶剤を使用することが検討されている
が、石油系溶剤は引火点が約４１℃と低く、洗浄・乾燥
工程、特に乾燥工程において衣服類が乾燥されていくに
つれて衣服類の温度が上昇すると共に溶剤ガスの濃度が
薄くなって引火しやすくなり、静電気による火花や、金
属が衣服類と一緒に入った場合に内胴と金属とが当るこ
とによって発生する火花によって、溶剤ガスに引火して
爆発するおそれがある。2. Description of the Related Art In dry cleaning, it is considered to use petroleum-based solvents to prevent pollution. However, petroleum-based solvents have a low flash point of about 41 ° C. In the case of clothes being dried, the temperature of the clothes rises and the concentration of solvent gas becomes weaker, which makes it easier to catch fire, and sparks from static electricity and the inner body and metal when metal enters with the clothes. Sparks generated by hitting the metal may cause the solvent gas to ignite and explode.
【０００３】前記のような爆発の危険を防止するため、
ドライクリーニングの洗浄・乾燥系内に窒素ガスを導入
することが提案されている（特開平３−１２６４８９号
参照）。そして、この従来技術においては、ドライクリ
ーニング機内を減圧した後窒素ガスタンクからドライク
リーニング機内へ窒素ガスを供給するようにしたものが
開示されている。しかしながら、ガスタンク中の窒素ガ
スは次第に消耗するので、タンク中のガスの残量を常に
管理し、必要に応じタンクを取り換えなければならない
煩らわしさがある。In order to prevent the danger of explosion as described above,
It has been proposed to introduce nitrogen gas into the cleaning / drying system of dry cleaning (see Japanese Patent Laid-Open No. 3-126489). Then, in this conventional technique, there is disclosed one in which the inside of the dry cleaning machine is depressurized and then the nitrogen gas is supplied from the nitrogen gas tank into the dry cleaning machine. However, since the nitrogen gas in the gas tank is gradually consumed, it is troublesome to constantly manage the remaining amount of gas in the tank and replace the tank as necessary.
【０００４】本発明者は、前記の如き従来技術の問題点
を改善するため、空気中の窒素をとり込む窒素ガス発生
装置と窒素ガスタンクとを組み合せ、窒素ガス発生装置
により空気中から取り込んだ窒素ガスを常時タンクに補
充し、必要な時に必要とする量の窒素ガスをドライクリ
ーニング機の系内に導入し得るようにした装置を提案し
た。In order to improve the above-mentioned problems of the prior art, the present inventor combined a nitrogen gas generator for taking in nitrogen in the air and a nitrogen gas tank, and took in nitrogen from the air by the nitrogen gas generator. A device was proposed in which gas was constantly replenished in the tank so that the required amount of nitrogen gas could be introduced into the system of the dry cleaning machine when needed.
【０００５】[0005]
【発明が解決しようとする課題】前記のドライクリーニ
ング装置において、洗浄・乾燥系内の酸素濃度が１１％
以下であれば爆発の危険がないことが判明している。従
って、爆発の危険がないようにドライクリーニング機を
運転するためには、ドライクリーニング機の系内の酸素
濃度を検出し、その検出値が１１％に達したら、機械の
運転を停止させればよい筈であるが、上記の装置を用い
て実験研究した結果、ドライクリーニング機の系内の酸
素濃度の検出のみでは安全運転上なお問題があることを
知った。すなわち、窒素ガス発生装置と窒素ガスタンク
とを組合せ、窒素ガス発生装置により空気中からとり込
んだ窒素ガスを常時タンクに補充するようにしたものに
おいては、窒素ガス発生装置の性能が安定していれば問
題はないが、窒素ガス発生装置は、圧縮空気をフィルタ
ーで濾過して清浄化し、その清浄化した空気を窒素ガス
吸着塔に送って窒素を吸着するものであるから、エアフ
ィルタの性能の低下や吸着剤の能力が低下した場合には
設定純度の窒素ガスを得ることができなくなるおそれが
あり、その場合には、ドライクリーニング機の系内の酸
素濃度が１１％以下であっても、次回の窒素ガスの導入
時に爆発限界以上の酸素を含む窒素ガスを導入して爆発
を引き起すおそれがある。In the above dry cleaning apparatus, the oxygen concentration in the cleaning / drying system is 11%.
It has been found that there is no danger of explosion if: Therefore, in order to operate the dry cleaning machine so that there is no danger of explosion, the oxygen concentration in the system of the dry cleaning machine is detected, and when the detected value reaches 11%, the operation of the machine should be stopped. It should be good, but as a result of experimental research using the above-mentioned device, I found that there is still a problem in safe operation only by detecting the oxygen concentration in the system of the dry cleaning machine. That is, in the case where the nitrogen gas generator and the nitrogen gas tank are combined so that the nitrogen gas taken in from the air by the nitrogen gas generator is constantly replenished to the tank, the performance of the nitrogen gas generator is stable. If there is no problem, the nitrogen gas generator filters compressed air with a filter to clean it and sends the cleaned air to a nitrogen gas adsorption tower to adsorb nitrogen. If the capacity of the adsorbent is reduced or the capacity of the adsorbent is reduced, it may not be possible to obtain the nitrogen gas of the set purity. In that case, even if the oxygen concentration in the system of the dry cleaning machine is 11% or less, At the next introduction of nitrogen gas, nitrogen gas containing oxygen exceeding the explosion limit may be introduced to cause an explosion.
【０００６】本発明は、前記の如き従来技術の問題点を
改善し、窒素ガス発生装置と窒素ガスタンクとを組合せ
てドライクリーニング機に窒素ガスを導入するようにし
たドライクリーニング装置において、爆発の危険を確実
になくして常に安全に運転することができる運転制御方
法を提供することを目的とする。The present invention solves the problems of the prior art as described above, and in a dry cleaning apparatus in which a nitrogen gas generator and a nitrogen gas tank are combined to introduce nitrogen gas into a dry cleaning machine, there is a risk of explosion. It is an object of the present invention to provide an operation control method capable of always driving safely by eliminating the problem.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記の如き目
的を達成するため、空気中の窒素をとり込む窒素ガス発
生装置と、該窒素ガス発生装置により発生した窒素ガス
を貯蔵する窒素ガスタンクと、該窒素ガスタンクに投入
弁を介して接続されたドライクリーニング機とよりな
り、前記窒素ガス発生装置により発生した窒素を窒素ガ
スタンクに貯蔵し、必要に応じ該タンクからドライクリ
ーニング装置へ窒素ガスを導入すべくなしたドライクリ
ーニング機において、前記窒素ガスタンクのガス入口側
の酸素濃度を検出する手段と、前記ドライクリーニング
機の洗浄・乾燥系内の酸素濃度を検出する手段を備え、
前記窒素ガスタンクの入口側の酸素濃度とドライクリー
ニング機の系内の酸素濃度とが何れも設定値以下である
ときにのみドライクリーニング機の運転を継続し、窒素
ガスタンクの入口側の酸素濃度またはドライクリーニン
グ機の系内酸素濃度の何れか一方または双方が設定値以
上のときはドライクリーニング機の運転を停止させるこ
とを特徴とする。In order to achieve the above-mentioned objects, the present invention provides a nitrogen gas generator for taking in nitrogen in the air, and a nitrogen gas tank for storing nitrogen gas generated by the nitrogen gas generator. And a dry cleaning machine connected to the nitrogen gas tank via a charging valve, storing nitrogen generated by the nitrogen gas generator in a nitrogen gas tank, and supplying nitrogen gas from the tank to the dry cleaning apparatus as necessary. In the dry cleaning machine to be introduced, a means for detecting the oxygen concentration on the gas inlet side of the nitrogen gas tank, and means for detecting the oxygen concentration in the cleaning / drying system of the dry cleaning machine,
Only when both the oxygen concentration on the inlet side of the nitrogen gas tank and the oxygen concentration in the system of the dry cleaning machine are less than or equal to a set value, the dry cleaning machine is operated, and the oxygen concentration on the inlet side of the nitrogen gas tank or dry It is characterized in that the operation of the dry cleaning machine is stopped when either one or both of the oxygen concentration in the system of the cleaning machine is equal to or higher than a set value.
【０００８】[0008]
【作用】本発明は、前記の如く、ドライクリーニング機
の系内の酸素濃度と窒素ガス発生装置から窒素ガスタン
クへ至る管路内の酸素濃度との双方を検出し、その双方
の酸素濃度が設定値以下の場合にのみ運転を継続し、何
れか一方または双方が設定値以上のときはドライクリー
ニング機の運転を停止させるので、窒素ガス発生装置の
性能が低下して爆発限界以上の酸素を含むようになって
も、それがドライクリーニング機内に導入されることが
なくなり、ドライクリーニング機が爆発するのを確実に
防止することができる。According to the present invention, as described above, both the oxygen concentration in the system of the dry cleaning machine and the oxygen concentration in the pipeline from the nitrogen gas generator to the nitrogen gas tank are detected, and both oxygen concentrations are set. The operation is continued only when the value is less than or equal to the value, and the operation of the dry cleaning machine is stopped when either or both of the values are greater than the set value, so the performance of the nitrogen gas generator deteriorates and oxygen exceeding the explosion limit is included. Even if it happens, it will not be introduced into the dry cleaning machine, and it is possible to reliably prevent the dry cleaning machine from exploding.
【０００９】[0009]
【実施例】以下、添付図面について本発明の一実施例を
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings.
【００１０】図１は本発明の運転制御方法を示すフロー
チャート、図２は本発明を適用したドライクリーニング
装置のブロック図である。FIG. 1 is a flow chart showing an operation control method of the present invention, and FIG. 2 is a block diagram of a dry cleaning apparatus to which the present invention is applied.
【００１１】これらの図において、１は空気中から窒素
をとり込む窒素ガス発生装置であって、市販のものであ
る。２は前記窒素ガス発生装置に管路３を介して接続さ
れた窒素ガスタンクであって、窒素ガス発生装置１が電
源に接続されている間は設定値の窒素ガスが貯蔵されて
いる。窒素ガスタンク２は窒素投入弁４を有する管路５
を介してドライクリーニング機６の洗浄・乾燥系内に接
続されており、そのドライクリーニング機６には系内の
圧力検出手段７を備え、ドライクリーニング機の系内を
真空ポンプ（図示を省略した）により減圧すると、圧力
検出手段７の信号を受けてマイコン制御部８により投入
弁４を開き、ドライクリーニング機の洗浄・乾燥系内が
大気圧になるまで窒素ガスをドライクリーニング機内に
供給するように構成されている。このように、ドライク
リーニング機内が減圧されると、窒素ガスタンク２中の
窒素ガスはドライクリーニング機６中に導入され、それ
に伴って窒素ガス発生装置１により空気中からとり込ん
だ窒素ガスが窒素ガスタンク２に補充される。In these figures, 1 is a nitrogen gas generator for taking in nitrogen from the air, which is commercially available. Reference numeral 2 denotes a nitrogen gas tank which is connected to the nitrogen gas generator through a pipe line 3 and stores a set value of nitrogen gas while the nitrogen gas generator 1 is connected to a power source. The nitrogen gas tank 2 has a pipeline 5 having a nitrogen input valve 4.
Is connected to the inside of the cleaning / drying system of the dry cleaning machine 6 by means of a pressure detecting means 7 in the system, and a vacuum pump (not shown) is provided in the system of the dry cleaning machine. ), The microcomputer control unit 8 receives the signal from the pressure detection means 7 and opens the closing valve 4 to supply nitrogen gas into the dry cleaning machine until the inside of the cleaning / drying system of the dry cleaning machine becomes atmospheric pressure. Is configured. In this way, when the inside of the dry cleaning machine is decompressed, the nitrogen gas in the nitrogen gas tank 2 is introduced into the dry cleaning machine 6, and the nitrogen gas taken in from the air by the nitrogen gas generator 1 is accompanied by this. It is replenished to 2.
【００１２】また、本発明においては、窒素ガスタンク
２の入口側、すなわち窒素ガス発生装置１から窒素ガス
タンク２に至る管路３に酸素濃度検出手段９を備え、ま
た、ドライクリーニング機６に系内の酸素濃度検出手段
１０を備え、酸素濃度検出手段９が例えば３％以上の酸
素を含むことを検出するとマイコン制御部８に信号を送
り、また、酸素濃度検出手段１０が例えば１０％以上の
酸素を含むことを検出するとマイコン制御部８に信号を
送り、何れの場合も、図１に示すように警報を発すると
共にドライクリーニング６機の運転を停止し、双方の酸
素濃度検出手段が何れも設定値以下であることを検出し
た場合にのみ図１に示すようにドライクリーニング機６
の運転を継続するようにマイコン制御部８により制御す
る。Further, in the present invention, the oxygen concentration detecting means 9 is provided on the inlet side of the nitrogen gas tank 2, that is, the pipe line 3 extending from the nitrogen gas generator 1 to the nitrogen gas tank 2, and the dry cleaning machine 6 is provided with an internal system. When the oxygen concentration detecting means 9 detects that the oxygen concentration detecting means 9 contains, for example, 3% or more oxygen, it sends a signal to the microcomputer control section 8, and the oxygen concentration detecting means 10 also supplies, for example, 10% or more oxygen. When it detects that the oxygen concentration is included, a signal is sent to the microcomputer control unit 8, and in any case, as shown in FIG. 1, an alarm is issued and the operation of the 6 dry cleaning machines is stopped, and both oxygen concentration detecting means are set. Only when it is detected that the value is less than or equal to the value, as shown in FIG.
The microcomputer control unit 8 controls to continue the above operation.
【００１３】[0013]
【発明の効果】本発明の運転制御方法は、前記の如く、
窒素ガスタンクの入口側とドライクリーニング機の系内
の酸素濃度とを検出し、双方の検出値が認定値以下であ
る場合にのみドライクリーニング機の運転を継続し、そ
うでない場合には自動的に運転を停止させるので、窒素
ガス発生装置と窒素ガスタンクを組み合わせた装置によ
り、ドライクリーニング機に窒素ガスを導入すべくなし
たドライクリーニング機の爆発を確実にかつ未然に防止
して安全に運転することができる効果がある。As described above, the operation control method of the present invention is as follows.
It detects the inlet side of the nitrogen gas tank and the oxygen concentration in the system of the dry cleaning machine, and continues the operation of the dry cleaning machine only when the detected values of both are less than the certified value. Since the operation is stopped, a device that combines a nitrogen gas generator and a nitrogen gas tank must be used to securely and prevent the explosion of the dry cleaning machine that was designed to introduce nitrogen gas into the dry cleaning machine, and operate safely. There is an effect that can be.
図１は本発明によるドライクリーニング機の安全運転制
御方法を示すフローチャートである。図２は本発明を適
用したドライクリーニング装置を示すブロック図であ
る。FIG. 1 is a flowchart showing a safe driving control method for a dry cleaning machine according to the present invention. FIG. 2 is a block diagram showing a dry cleaning device to which the present invention is applied.
１…窒素ガス発生装置、２…窒素ガスタンク、３，５…
管路、４…窒素ガス投入弁、６…ドライクリーニング
機、７…ドライクリーニング機の系内圧力検出手段、８
…マイコン制御部、９…タンク入口側の酸素濃度検出手
段、１０…ドライクリーニング機の系内酸素濃度検出手
段。1 ... Nitrogen gas generator, 2 ... Nitrogen gas tank, 3, 5 ...
Pipe line, 4 ... Nitrogen gas injection valve, 6 ... Dry cleaning machine, 7 ... In-system pressure detection means of dry cleaning machine, 8
... microcomputer control unit, 9 ... oxygen concentration detecting means on the tank inlet side, 10 ... oxygen concentration detecting means in the system of the dry cleaning machine.
Claims (2)
置と、該窒素ガス発生装置により発生した窒素ガスを貯
蔵する窒素ガスタンクと、該窒素ガスタンクに投入弁を
介して接続されたドライクリーニング機とよりなり、前
記窒素ガス発生装置により発生した窒素を窒素ガスタン
クに貯蔵し、必要に応じ該タンクからドライクリーニン
グ装置へ窒素ガスを導入すべくなしたドライクリーニン
グ機において、前記窒素ガスタンクのガス入口側の酸素
濃度を検出する手段と、前記ドライクリーニング機の洗
浄・乾燥系内の酸素濃度を検出する手段を備え、前記窒
素ガスタンクの入口側の酸素濃度とドライクリーニング
機の系内の酸素濃度とが何れも設定値以下であるときに
のみドライクリーニング機の運転を継続し、窒素ガスタ
ンクの入口側の酸素濃度またはドライクリーニング機の
系内酸素濃度の何れか一方または双方が設定値以上のと
きはドライクリーニング機の運転を停止させることを特
徴とする可燃性溶剤使用のドライクリーニング機におけ
る安全運転制御方法。1. A nitrogen gas generator for taking in nitrogen in the air, a nitrogen gas tank for storing nitrogen gas generated by the nitrogen gas generator, and a dry cleaning machine connected to the nitrogen gas tank via a charging valve. In a dry cleaning machine configured to store nitrogen generated by the nitrogen gas generator in a nitrogen gas tank and introduce the nitrogen gas from the tank to the dry cleaning device as needed, the gas inlet side of the nitrogen gas tank And means for detecting the oxygen concentration in the cleaning / drying system of the dry cleaning machine, wherein the oxygen concentration at the inlet side of the nitrogen gas tank and the oxygen concentration in the system of the dry cleaning machine are The dry cleaning machine continues to operate only when both are below the set value, and the oxygen at the inlet side of the nitrogen gas tank is A safe operation control method in a dry cleaning machine using a flammable solvent, wherein the operation of the dry cleaning machine is stopped when either or both of the concentration and the oxygen concentration in the system of the dry cleaning machine are equal to or more than a set value.
定値を１０％ないしそれより以下とし、窒素ガスタンク
入口側の酸素濃度設定値を３％ないしそれより以下とし
たことを特徴とする請求項１に記載の可燃性溶剤使用の
ドライクリーニング機における安全運転制御方法。2. A dry cleaning machine having an in-system oxygen concentration set value of 10% or less and an oxygen concentration set value of a nitrogen gas tank inlet side of 3% or less. A safe operation control method in a dry cleaning machine using a flammable solvent according to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15203192A JP3172583B2 (en) | 1992-06-11 | 1992-06-11 | Safe operation control method in dry cleaning machine using flammable solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15203192A JP3172583B2 (en) | 1992-06-11 | 1992-06-11 | Safe operation control method in dry cleaning machine using flammable solvent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05337287A true JPH05337287A (en) | 1993-12-21 |
| JP3172583B2 JP3172583B2 (en) | 2001-06-04 |
Family
ID=15531550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15203192A Expired - Fee Related JP3172583B2 (en) | 1992-06-11 | 1992-06-11 | Safe operation control method in dry cleaning machine using flammable solvent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3172583B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009008631A1 (en) * | 2007-07-10 | 2009-01-15 | Stet Co., Ltd. | Apparatus for preventing explosion of instrument using organic solvent |
| WO2020043146A1 (en) * | 2018-08-31 | 2020-03-05 | 美丰工业有限公司 | Dry cleaning machine, dry cleaning system, and dry cleaning method |
-
1992
- 1992-06-11 JP JP15203192A patent/JP3172583B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009008631A1 (en) * | 2007-07-10 | 2009-01-15 | Stet Co., Ltd. | Apparatus for preventing explosion of instrument using organic solvent |
| WO2020043146A1 (en) * | 2018-08-31 | 2020-03-05 | 美丰工业有限公司 | Dry cleaning machine, dry cleaning system, and dry cleaning method |
| CN110872770A (en) * | 2018-08-31 | 2020-03-10 | 美丰工业有限公司 | Dry cleaning machine, dry cleaning system and dry cleaning method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3172583B2 (en) | 2001-06-04 |
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