JPH0228209A - Apparatus for storing unsaturated polyester and styrene monomer liquid - Google Patents
Apparatus for storing unsaturated polyester and styrene monomer liquidInfo
- Publication number
- JPH0228209A JPH0228209A JP17491588A JP17491588A JPH0228209A JP H0228209 A JPH0228209 A JP H0228209A JP 17491588 A JP17491588 A JP 17491588A JP 17491588 A JP17491588 A JP 17491588A JP H0228209 A JPH0228209 A JP H0228209A
- Authority
- JP
- Japan
- Prior art keywords
- storage tank
- monomer liquid
- gas
- oxygen
- styrene monomer
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 26
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229920006305 unsaturated polyester Polymers 0.000 title claims abstract description 21
- 239000001301 oxygen Substances 0.000 claims abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims 1
- 238000010926 purge Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract 3
- 239000012808 vapor phase Substances 0.000 abstract 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 15
- 229910001882 dioxygen Inorganic materials 0.000 description 15
- 230000006866 deterioration Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Macromonomer-Based Addition Polymer (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的ゴ
（産業上の利用分野）
本発明は、化学産業におけるプラスチック材原料である
不飽和ポリエステル・スチレンモノマー液の保管装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to an apparatus for storing unsaturated polyester/styrene monomer liquid, which is a raw material for plastic materials in the chemical industry.
（従来の技術）
一般に３力月程度不飽和ポリエステル・スチレンモノマ
ー液（以下製品と略す）を保管する場合、大気と接触さ
せるだけで、製品中の溶存酸素濃度は高く保持されるこ
とから、重合反応による品質低下は抑制させることがで
きる。(Prior art) Generally, when storing an unsaturated polyester/styrene monomer liquid (hereinafter referred to as the product) for about 3 months, the dissolved oxygen concentration in the product is maintained at a high level simply by contacting it with the atmosphere, so polymerization Quality deterioration due to reaction can be suppressed.
しかし製品の保管が３力月以上を越えると、温度の影響
から品質低下が無視できなくなるため、第２図に示すよ
うな装置を用いて製品の温度を５℃に冷却して保管して
いる。However, if the product is stored for more than 3 months, quality deterioration cannot be ignored due to the influence of temperature, so a device like the one shown in Figure 2 is used to cool the product to 5℃ before storage. .
以下第２図を参照して、不飽和ポリエステル・スチレン
モノマー液の保管装置の従来例について説明する。A conventional example of a storage device for unsaturated polyester/styrene monomer liquid will be described below with reference to FIG.
第２図において、貯留タンク１内に貯留された製品は一
定温度に冷却するために、循環ライン２を介して循環ポ
ンプ３によって冷却器４内に導入される。この導入され
た製品は冷却器４内で一定温度に冷却された後、再び放
出口２ａを介して貯留タンク１内に導入される。前記冷
却＋ａ４内には一定温度に制御された冷媒が導入されて
おり、この冷媒は冷媒ライン５によって冷却器４外へ導
出され、冷凍機６にて冷却された後再び冷却器４内に導
入される。さらに前記貯留タンク１には内部の気相部分
の成分が爆鳴領域にならないように製品内に窒素ガスを
注入する窒素パージライン７が配設されている。そして
貯留タンク１内の気体を排出させるために貯留タンク１
の上部にベントライン８が設けられ、このベントライン
８の端部にはベントフィルタ９が配設されている。なお
、この貯留タンク１には製品の温度を監視するために温
度計１０が配設されている。In FIG. 2, the product stored in a storage tank 1 is introduced into a cooler 4 via a circulation line 2 by a circulation pump 3 in order to be cooled to a constant temperature. After the introduced product is cooled to a constant temperature in the cooler 4, it is introduced into the storage tank 1 again through the discharge port 2a. A refrigerant controlled at a constant temperature is introduced into the cooling +a4, and this refrigerant is led out of the cooler 4 through a refrigerant line 5, cooled by a refrigerator 6, and then introduced into the cooler 4 again. be done. Further, the storage tank 1 is provided with a nitrogen purge line 7 for injecting nitrogen gas into the product so that the components in the internal gas phase do not reach the explosive range. Then, the storage tank 1 is used to discharge the gas inside the storage tank 1.
A vent line 8 is provided above the vent line 8, and a vent filter 9 is provided at the end of the vent line 8. Note that a thermometer 10 is provided in the storage tank 1 to monitor the temperature of the product.
よって上述した装置によって３力月以−ヒの製品保管が
行なわれている。Therefore, the above-mentioned device has been used to store products for more than three months.
（発明が解決しようとする課題）
以上の構成において、冷却器が故障し製品の温度が３０
℃を越えると気相中の製品の濃度は１ｔｏｏ。(Problem to be solved by the invention) In the above configuration, the cooler malfunctions and the product temperature drops to 30℃.
When the temperature exceeds ℃, the concentration of the product in the gas phase is 1too.
Ｐｃｍを越え爆鳴領域に入るため従来例においては、保
安上貯留タンク内気相部分は窒素ガスをパージし、爆鳴
領域にならないよう管理している。In the conventional example, for safety reasons, the gas phase inside the storage tank is purged with nitrogen gas to ensure that it does not reach the explosion range.
しかしながらその結果、窒素ガスの影響により、製品の
溶存酸素濃度が低下し、重合反応が進み、製品の品質低
下が問題になっている。However, as a result, the concentration of dissolved oxygen in the product decreases due to the influence of nitrogen gas, and the polymerization reaction progresses, causing a problem of deterioration in product quality.
この問題を解決するためには、製品の溶存酸素濃度を所
定の値に保持してやればよい。製品の溶存酸素濃度を所
定の値に保持するためには、製品貯留タンク、気相部の
酸素分圧を高くすればよいが、気相中の製品濃度と酸素
濃度から爆鳴領域になる危険があるため、この方法は採
用できない。In order to solve this problem, it is sufficient to maintain the dissolved oxygen concentration of the product at a predetermined value. In order to maintain the dissolved oxygen concentration of the product at a predetermined value, it is possible to increase the oxygen partial pressure in the product storage tank and the gas phase, but there is a risk that the product concentration and oxygen concentration in the gas phase will lead to explosions. Therefore, this method cannot be adopted.
また、直接酸素ガスを製品に注入する方法もあるが、気
泡の発生があり、溶存しなかった酸素ガスは、気相部に
抜けるため結果として気相部の酸素分圧が高くなり、前
述した様に爆鳴領域になる可能性があった。There is also a method of directly injecting oxygen gas into the product, but bubbles are generated and undissolved oxygen gas escapes into the gas phase, resulting in a higher oxygen partial pressure in the gas phase. There was a possibility that it would become an explosive area.
本発明の目的は、貯留タンク内に貯留された製品内に窒
素ガスをパージし、かつ貯留タンク気相部の酸素濃度の
上昇を抑制して製品中の酸素濃度を高めることのできる
不飽和ポリエステル・スチレンモノマー液の保管装置を
得ることにある。An object of the present invention is to provide an unsaturated polyester that can purge nitrogen gas into a product stored in a storage tank, suppress an increase in oxygen concentration in the gas phase of the storage tank, and increase the oxygen concentration in the product. - To obtain a storage device for styrene monomer liquid.
（課題を解決するための手段） 上記目的を達成するために、本発明においては。 (Means for solving problems) In order to achieve the above object, in the present invention.
不飽和ポリエステル・スチレンモノマー液を貯留する貯
留タンクと、この貯留タンク内の不飽和ポリエステル・
スチレンモノマー液を抽出し冷却させた後再び貯留タン
ク内に注入させる冷却循環系とから成る不飽和ポリエス
テル・スチレンモノマー液の保管装置において、前記冷
却循環系に流通する不飽和ポリエステル・スチレンモノ
マー液内の酸素濃度を制御する酸素注入装置を設置し、
前記貯留タンク内に不飽和ポリエステル・スチレンモノ
マー液の揮発を抑制する浮蓋を収容し、前記貯留タンク
内の気相部に窒素ガスを注入する窒素ガス注入装置を配
設し、前記貯留タンク内の可燃性ガス、酸素濃度を測定
する可燃性ガス、酸素濃度測定装置を設置して成ること
を特徴とする不飽和ポリエステル・スチレンモノマー液
の保管装置を提供する。A storage tank that stores unsaturated polyester/styrene monomer liquid, and a storage tank that stores unsaturated polyester/styrene monomer liquid.
In an unsaturated polyester/styrene monomer liquid storage device comprising a cooling circulation system in which the styrene monomer liquid is extracted, cooled, and then reinjected into a storage tank, the unsaturated polyester/styrene monomer liquid flowing through the cooling circulation system is We installed an oxygen injection device to control the oxygen concentration of
A floating lid for suppressing volatilization of the unsaturated polyester/styrene monomer liquid is housed in the storage tank, and a nitrogen gas injector for injecting nitrogen gas into the gas phase in the storage tank is provided. To provide a storage device for an unsaturated polyester/styrene monomer liquid, which is characterized by being equipped with a combustible gas and an oxygen concentration measuring device for measuring combustible gas and oxygen concentration.
（作用）
このように構成された不飽和ポリエステル・スチレンモ
ノマー液の保管装置においては、酸素注入装置によって
製品内に酸素を溶解させ酸素の気泡として気相部に混入
することを防止させることができるので製品内の酸素濃
度が制御できかつ貯留タンク気相部の酸素濃度の上昇を
抑制させるこいて説明する。なお、第１図において、第
２図と同一部分には同一符号を付し、その部分の構成の
説明は省略する。第１図においてタンク内製品を冷却す
るために、パイプライン２．循環ポンプ３゜冷却器４を
経由して、貯留タンク１に戻る冷却循環ライン３４が配
設されている。この冷却循環ライン３４を利用し酸素注
入器３０を冷却器４の下流側に設置する。この酸素注入
器３０には、ポリ４弗化エチレンチユーブにて形成され
た酸素ガスライン１９が収納されている。(Function) In the unsaturated polyester/styrene monomer liquid storage device configured as described above, the oxygen injection device can dissolve oxygen in the product and prevent it from entering the gas phase as oxygen bubbles. Therefore, the oxygen concentration within the product can be controlled and the increase in oxygen concentration in the gas phase portion of the storage tank can be suppressed. In FIG. 1, the same parts as in FIG. 2 are given the same reference numerals, and the explanation of the structure of the parts will be omitted. In FIG. 1, a pipeline 2. A cooling circulation line 34 is provided which returns to the storage tank 1 via the circulation pump 3° cooler 4. Using this cooling circulation line 34, an oxygen injector 30 is installed downstream of the cooler 4. This oxygen injector 30 houses an oxygen gas line 19 formed of a polytetrafluoroethylene tube.
酸素ガスライン１９は、酸素ガスボンベ１４．圧力調整
弁１６．過流量停止弁１８．トラップ２０．逃し弁２２
、流量調節弁２３．流量計２４から構成されている。The oxygen gas line 19 connects to the oxygen gas cylinder 14. Pressure regulating valve 16. Overflow stop valve 18. Trap 20. Relief valve 22
, flow control valve 23. It is composed of a flow meter 24.
この酸素ガスボンベ１４の高圧酸素ガスは、圧力調整弁
１６で減圧したあと、酸素ガスライン１９の下流側に設
置した、流量調節弁工３で流量を調節するように成って
いる。The pressure of the high-pressure oxygen gas in the oxygen gas cylinder 14 is reduced by a pressure regulating valve 16, and then the flow rate is adjusted by a flow regulating valve 3 installed on the downstream side of the oxygen gas line 19.
冷却循環ライン３４の圧力は一定、酸素ガスライン１９
の長さ（ポリ４弗化エチレンチユーブの外表面積の大き
さ）は一定とした場合、酸素注入量は、酸素ガスの圧力
を変えることで調節する。The pressure in the cooling circulation line 34 is constant, and the pressure in the oxygen gas line 19 is constant.
When the length (the size of the outer surface area of the polytetrafluoroethylene tube) is constant, the amount of oxygen to be injected is adjusted by changing the pressure of oxygen gas.
製品の溶存酸素注入量は、＃素注入器３０の入口に設置
した溶存Ｎ！索計１３と出口に設置した溶存酸素計３３
で検出する。酸素ガスライン１９のヒビ割れ、ピンホー
ル又は破断により大量の酸素ガスが製品側に流出する事
故が起ると過流量停止弁１８が働き、酸素ガスの流れを
止める。又、逆に冷却循環ライン３４の圧力が高く、製
品が酸素ガスライン１９から流入する時は、下流側に設
置したトラップ２０で捕集する。トラップ２０にはレベ
ルスイッチ２１が設置されており、レベル高で作動し冷
却循環ライン３４の酸素注入量３０のバイパス弁１１を
開き酸素注入器３０の入口弁２９と出口弁３１を閉じる
。これによって、貯留タンク１の冷却循環を維持しなが
ら、酸素注入器３０は入口弁２９と出口弁３１で隔離さ
れ、酸素ガスラインＩ９からの製品の流入は止まる。The amount of dissolved oxygen injected into the product is determined by the dissolved N! Dissolved oxygen meter 33 installed at the cable meter 13 and the exit
Detect with. If an accident occurs in which a large amount of oxygen gas flows out to the product side due to a crack, pinhole, or break in the oxygen gas line 19, the overflow stop valve 18 operates to stop the flow of oxygen gas. Conversely, when the pressure in the cooling circulation line 34 is high and the product flows in from the oxygen gas line 19, it is collected by the trap 20 installed on the downstream side. A level switch 21 is installed in the trap 20 and operates at a high level to open the bypass valve 11 of the oxygen injection amount 30 of the cooling circulation line 34 and close the inlet valve 29 and outlet valve 31 of the oxygen injector 30. As a result, while maintaining the cooling circulation of the storage tank 1, the oxygen injector 30 is isolated by the inlet valve 29 and the outlet valve 31, and the inflow of product from the oxygen gas line I9 is stopped.
前記貯留タンク１内には浮蓋３２が配設されており、製
品の揮発を押えている。一方、気相部は爆鳴気にならな
いよう、窒素ガスパージライン７から窒素ガスを流し、
ベントライン８、ベントフィルター９を経由して排気し
ながら、気相部を窒素ガスと置換する。A floating lid 32 is disposed inside the storage tank 1 to suppress volatilization of the product. On the other hand, in order to prevent explosions from occurring in the gas phase, nitrogen gas is supplied from the nitrogen gas purge line 7.
While exhausting through the vent line 8 and vent filter 9, the gas phase is replaced with nitrogen gas.
気相部の気体はサンプルポンプ２５で取出し再び貯留タ
ンク１に戻るサンプルライン２６上に可燃性ガス濃度計
２７と酸素計２８を取付けて、気相部の気体組成が爆鳴
気にならないよう管理している。A combustible gas concentration meter 27 and an oxygen meter 28 are installed on the sample line 26, which takes out the gas in the gas phase using a sample pump 25 and returns it to the storage tank 1, so that the gas composition in the gas phase does not become explosive. are doing.
よって１本発明によれば従来どおりに製品中に窒素ガス
をパージさせ、さらには貯留タンクの気相部の酸素濃度
を上昇させることなしに製品中の酸素濃度を上昇させる
ことができるので製品を長期的にかつ安全に貯留させる
ことのできる不飽和ポリエステル・スチレンモノマー液
の保管装置を得ることができる。Therefore, according to the present invention, the oxygen concentration in the product can be increased without purging nitrogen gas into the product as before and without increasing the oxygen concentration in the gas phase of the storage tank. It is possible to obtain a storage device for unsaturated polyester/styrene monomer liquid that can be safely stored for a long period of time.
第１図及び第２図はそれぞれ本発明の一実施例及び従来
例を示す不飽和ポリエステル・スチレンモノマー液の保
管装置の系統図である。
１・・・貯留タンク ７・・・窒素ガスバージライン
１０・・・温度計 ２６・・・サンプルライン２
７・・・可燃性ガス濃度計
２８・・・酸素計 ３０・・・酸素注入器３２・
・・浮蓋 ３４・・・冷却＠環ライン代理人
弁理士 則 近 憲 佑
同 第子丸 健
第
図FIGS. 1 and 2 are system diagrams of an unsaturated polyester/styrene monomer liquid storage apparatus showing an embodiment of the present invention and a conventional example, respectively. 1...Storage tank 7...Nitrogen gas barge line 10...Thermometer 26...Sample line 2
7...Flammable gas concentration meter 28...Oxygen meter 30...Oxygen injector 32.
...Floating lid 34...Cooling @ ring line agent
Patent Attorney Nori Ken Chika Yudo Kendai Daishimaru
Claims (1)
貯留タンクと、この貯留タンク内の不飽和ポリエステル
・スチレンモノマー液を抽出し冷却させた後再び貯留タ
ンク内に注入させる冷却循環系とから成る不飽和ポリエ
ステル・スチレンモノマー液の保管装置において、前記
冷却循環系に流通する不飽和ポリエステル・スチレンモ
ノマー液内の酸素濃度を制御する酸素注入装置を設置し
、前記貯留タンク内に不飽和ポリエステル・スチレンモ
ノマー液の揮発を抑制する浮蓋を収容し、前記貯留タン
ク内の気相部に窒素ガスを注入する窒素ガス注入装置を
配設し、前記貯留タンク内の可燃性ガス、酸素濃度を測
定する可燃性ガス、酸素濃度測定装置を設置して成るこ
とを特徴とする不飽和ポリエステル・スチレンモノマー
液の保管装置。The unsaturated polyester/styrene monomer liquid consists of a storage tank that stores the unsaturated polyester/styrene monomer liquid, and a cooling circulation system that extracts the unsaturated polyester/styrene monomer liquid from the storage tank, cools it, and then injects it back into the storage tank. In the styrene monomer liquid storage device, an oxygen injection device is installed to control the oxygen concentration in the unsaturated polyester/styrene monomer liquid flowing through the cooling circulation system, and the unsaturated polyester/styrene monomer liquid is volatilized in the storage tank. A combustible gas containing a floating lid that suppresses the concentration of flammable gas and a nitrogen gas injector configured to inject nitrogen gas into a gas phase in the storage tank, and measuring the concentration of flammable gas and oxygen in the storage tank; A storage device for unsaturated polyester/styrene monomer liquid, characterized by being equipped with an oxygen concentration measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17491588A JPH0228209A (en) | 1988-07-15 | 1988-07-15 | Apparatus for storing unsaturated polyester and styrene monomer liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17491588A JPH0228209A (en) | 1988-07-15 | 1988-07-15 | Apparatus for storing unsaturated polyester and styrene monomer liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0228209A true JPH0228209A (en) | 1990-01-30 |
Family
ID=15986930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17491588A Pending JPH0228209A (en) | 1988-07-15 | 1988-07-15 | Apparatus for storing unsaturated polyester and styrene monomer liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0228209A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011190765A (en) * | 2010-03-16 | 2011-09-29 | Tsutomu Matsuda | Fuel reforming device |
-
1988
- 1988-07-15 JP JP17491588A patent/JPH0228209A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011190765A (en) * | 2010-03-16 | 2011-09-29 | Tsutomu Matsuda | Fuel reforming device |
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