JP2003171343A - Method for additionally setting bypass pipe in piping equipment for transporting readily polymerizable compound - Google Patents
Method for additionally setting bypass pipe in piping equipment for transporting readily polymerizable compoundInfo
- Publication number
- JP2003171343A JP2003171343A JP2001368496A JP2001368496A JP2003171343A JP 2003171343 A JP2003171343 A JP 2003171343A JP 2001368496 A JP2001368496 A JP 2001368496A JP 2001368496 A JP2001368496 A JP 2001368496A JP 2003171343 A JP2003171343 A JP 2003171343A
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- Japan
- Prior art keywords
- bypass pipe
- pipe
- attaching
- bypass
- polymerizable compound
- 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.)
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- Physical Or Chemical Processes And Apparatus (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、易重合性化合物の
移送配管設備におけるバイパス管の付設方法に係り、更
に詳しくはメイン配管にバイパス管を付設した場合に、
当該バイパス管が移送される重合性化合物によって閉塞
されるのを防止したバイパス管の付設方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a bypass pipe in a transfer pipe facility for an easily polymerizable compound, and more specifically, when a bypass pipe is attached to a main pipe,
The present invention relates to a method for attaching a bypass pipe, which prevents the bypass pipe from being blocked by a polymerizable compound being transferred.
【０００２】[0002]
【従来の技術及びその課題】従来、易重合性化合物の移
送配管設備には、メイン配管の途中に流量計、調節弁等
が組込まれている。この流量計或いは調節弁の部分で、
重合性化合物の重合が発生したり又は重合性化合物中に
含有されている重合禁止剤等が析出して、これらの機器
を閉塞するので時々分解・清掃作業が不可避であった。2. Description of the Related Art Conventionally, a flowmeter, a control valve and the like have been incorporated in the middle of a main pipe in a transfer pipe facility for an easily polymerizable compound. In this flow meter or control valve part,
Polymerization of the polymerizable compound occurs, or a polymerization inhibitor contained in the polymerizable compound is deposited to block these devices, so that the disassembling / cleaning work is sometimes unavoidable.
【０００３】これら機器の分解・清掃作業中でも、易重
合性化合物の製造プラントを中止することなく連続運転
を可能にするために、流量計或いは調節弁等の機器を跨
いで、メイン配管にバイパス管を付設することが行われ
ている。従来、このバイパス管はメイン配管に対して同
一水平位置或いは下方位置に分岐して付設していた。メ
イン配管に易重合性化合物が通過中に、バイパス管の同
一水平位置或いは下方位置に徐々に易重合性化合物の固
形物等が滞留・付着してバイパス管内を閉塞することが
あり、メイン配管にバイパス管を付設した本来の目的が
達せられないことがあると云う欠点を有していた。Even during the disassembling / cleaning operation of these devices, in order to enable continuous operation without stopping the production plant of the easily polymerizable compound, a bypass pipe is provided in the main pipe across the devices such as the flow meter or the control valve. Is being attached. Conventionally, this bypass pipe has been branched and installed at the same horizontal position or a lower position with respect to the main pipe. While the easily polymerizable compound is passing through the main pipe, solid substances etc. of the easily polymerizable compound may gradually accumulate and adhere to the same horizontal position or lower position of the bypass pipe to block the inside of the bypass pipe. It has a drawback that the original purpose of attaching the bypass pipe may not be achieved.
【０００４】[0004]
【課題を解決する手段】本発明は、易重合性化合物の移
送配管設備におけるバイパス管の付設方法であって、当
該バイパス管内での重合物の発生等による閉塞を防止し
たバイパス管の付設方法を提供するものである。即ち、
本発明の要旨は、
（１）易重合性化合物の移送配管設備において、メイン
配管にバイパス管を付設するに際し、当該バイパス管の
少なくとも一部分がメイン配管より上方に立上がった位
置に設けられていることを特徴とするバイパス管の付設
方法である。
（２）バイパス管の少なくとも一部分はメイン配管の途
中に組込まれた流量計または調節弁より上方に立上がっ
た位置に設けられていることを特徴とする上記（１）の
バイパス管の付設方法である。
（３）流量計または調節弁を跨いて、各々バイパス管を
設けたことを特徴とする上記（２）のバイパス管の付設
方法である。
（４）バイパス管の分岐部分又は接続部分の少なくとも
一方はメイン配管より上方に勾配角αを有して立上がっ
ていることを特徴とする上記（１）〜（３）のバイパス
管の付設方法である。
（５）バイパス管の立上り勾配角αが３〜９０°である
ことを特徴とする上記（４）のバイパス管の付設方法で
ある。
（６）バイパス管の一方をメイン配管と同一高さ位置か
ら分岐させると共に、当該同一高さに位置するバイパス
管の部分に閉止弁が組込まれていることを特徴とする上
記（１）〜（５）のバイパス管の付設方法である。
（７）易重合性化合物が（メタ）アクリル酸及び／又は
そのエステルであるとを特徴とする上記（１）〜（７）
記載のバイパス管の付設方法である。
［発明の詳細な説明］The present invention relates to a method of attaching a bypass pipe in a transfer piping facility for an easily polymerizable compound, wherein the bypass pipe is attached so as to prevent blockage due to generation of a polymer in the bypass pipe. It is provided. That is,
The gist of the present invention is (1) In the transfer piping facility for easily polymerizable compounds, at the time of attaching a bypass pipe to the main pipe, at least a part of the bypass pipe is provided at a position rising above the main pipe. This is a method of attaching a bypass pipe, which is characterized in that (2) At least a part of the bypass pipe is provided at a position rising above a flow meter or a control valve incorporated in the middle of the main pipe. is there. (3) The method of attaching a bypass pipe according to the above (2), characterized in that a bypass pipe is provided across the flow meter or the control valve. (4) At least one of the branching portion and the connecting portion of the bypass pipe rises above the main pipe with a slope angle α, and the method for attaching the bypass pipe according to any one of (1) to (3) above. Is. (5) The method for attaching a bypass pipe according to (4) above, wherein the rising gradient angle α of the bypass pipe is 3 to 90 °. (6) One of the bypass pipes is branched from the same height position as the main pipe, and a shut-off valve is incorporated in a portion of the bypass pipe located at the same height position. This is the method of attaching the bypass pipe of 5). (7) The above-mentioned (1) to (7), wherein the easily polymerizable compound is (meth) acrylic acid and / or its ester.
This is the method of attaching the bypass pipe described. [Detailed Description of the Invention]
【０００５】[0005]
【発明の実施の形態】本発明の易重合性化合物の移送配
管設備におけるバイパス管の付設方法を添付図面に基づ
いて説明する。図１は易重合性化合物であるアクリル酸
を製造するプロセスフローの概略図、図２〜６は本発明
のバイパス管の付設方法の各々の概略図、図７は従来の
バイパス管の各々の付設方法の概略図である。BEST MODE FOR CARRYING OUT THE INVENTION A method for attaching a bypass pipe in a transfer pipe facility for a polymerizable compound according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a process flow for producing acrylic acid, which is an easily polymerizable compound, FIGS. 2 to 6 are schematic diagrams of respective methods of installing a bypass pipe of the present invention, and FIG. 7 is a conventional bypass pipe. 3 is a schematic diagram of a method.
【０００６】先ず、図１のアクリル酸を製造するプロセ
スフローの概要を説明する。Ａはアクリル酸捕集塔であ
って、当該アクリル酸捕集塔Ａにはアクリル酸含有反応
ガス供給ライン１からアクリル酸含有反応ガスが供給さ
れる。Ｂは蒸留塔であって、当該蒸留塔Ｂにはアクリル
酸水溶液抜出しライン２を介してアクリル酸捕集塔Ａの
塔底よりアクリル酸水溶液が供給する。Ｃは高沸分離塔
であって、当該高沸分離塔Ｃには粗アクリル酸抜出しラ
イン３を介して蒸留塔Ｂの塔底より粗アクリル酸が供給
される。高沸分離塔Ｃに供給された粗アクリル酸は精製
され高純度の精製アクリル酸となり、塔頂より精製アク
リル酸抜出しライン５及び６によって抜き出される。Ｄ
は高沸分解反応器であって、当該高沸分解反応器Ｄには
高沸分離塔抜出しライン７を介して高沸分離塔Ｃの塔底
より高沸点物が供給される。高沸分解反応器Ｄの底部か
ら高沸物が高沸分解反応器抜出しライン８を介して分離
除去される。なお、９はアクリル酸捕集水供給ライン、
１０は還流ライン及び１１は重合防止剤供給ラインであ
る。First, an outline of the process flow for producing acrylic acid in FIG. 1 will be described. A is an acrylic acid collection tower, and the acrylic acid-containing reaction gas is supplied from the acrylic acid-containing reaction gas supply line 1 to the acrylic acid collection tower A. B is a distillation column, and the acrylic acid aqueous solution is supplied to the distillation column B through the acrylic acid aqueous solution extraction line 2 from the bottom of the acrylic acid collection column A. C is a high boiling separation column, and crude acrylic acid is supplied to the high boiling separation column C from the bottom of the distillation column B via a crude acrylic acid extraction line 3. The crude acrylic acid supplied to the high boiling separation column C is refined into highly pure purified acrylic acid, which is extracted from the column top by the purified acrylic acid extraction lines 5 and 6. D
Is a high-boiling decomposition reactor, and the high-boiling decomposition reactor D is supplied with a high-boiling substance from the bottom of the high-boiling separation column C via a high-boiling separation column extraction line 7. High-boiling substances are separated and removed from the bottom of the high-boiling decomposition reactor D through the high-boiling decomposition reactor withdrawal line 8. In addition, 9 is an acrylic acid trap water supply line,
Reference numeral 10 is a reflux line and 11 is a polymerization inhibitor supply line.
【０００７】次に図２〜６に基づいて本発明のバイパス
管の付設方法を説明する。図２において、１３は水平に
配管されたメイン配管であって、当該メイン配管１３は
図１に示す各機器を結ぶラインや系外へ送り出されるラ
インの何れであっても構わないが、例えば高沸分離塔Ｃ
の塔頂より抜き出された高純度のアクリル酸の抜き出し
ライン６や、高沸分解反応器Ｄの抜き出しライン８でも
よい。そしてこの水平のメイン配管１３の途中にはドレ
ン管１５が接続されていると共に調節弁ＣＶが組込まれ
ている。１４はバイパス管であって、当該バイパス管１
４は水平に配管されたメイン配管１３から分岐されて勾
配角αで上方に立ち上がり、調節弁ＣＶを跨いで再度メ
イン配管１３に勾配角αで接続された配管で調節弁ＣＶ
用のバイパス管である。Next, a method of attaching the bypass pipe of the present invention will be described with reference to FIGS. In FIG. 2, 13 is a horizontal main pipe, and the main pipe 13 may be a line connecting the devices shown in FIG. 1 or a line sent out of the system. Boiling separation tower C
The extraction line 6 for high-purity acrylic acid extracted from the top of the column or the extraction line 8 for the high boiling decomposition reactor D may be used. A drain pipe 15 is connected to the middle of the horizontal main pipe 13 and a control valve CV is incorporated therein. Reference numeral 14 denotes a bypass pipe, and the bypass pipe 1
Reference numeral 4 denotes a control valve CV which is branched from a horizontally arranged main pipe 13 and rises upward at a gradient angle α and is connected to the main pipe 13 again at a gradient angle α across the control valve CV.
It is a bypass pipe for.
【０００８】図３の例では、バイパス管１４はメイン配
管１３の分岐部から距離Ｌの位置に閉止弁ＳＶを介在し
て水平方向に分岐し再度メイン配管１３に勾配角αで接
続された配管で調節弁ＣＶ用のバイパス管である。な
お、メイン配管１３はバイパス管１４の分岐部から下方
に折れ曲げられ次いで水平に配管され、当該水平の配管
部分にドレン管１５が接続されていると共に当該配管部
分に組込まれた調節弁ＣＶを介在させた後バイパス管１
４と接続した例である。In the example of FIG. 3, the bypass pipe 14 is branched in the horizontal direction at a distance L from the branch portion of the main pipe 13 with a stop valve SV interposed therebetween and is again connected to the main pipe 13 at a gradient angle α. It is a bypass pipe for the control valve CV. The main pipe 13 is bent downward from the branch portion of the bypass pipe 14 and then horizontally piped. The drain pipe 15 is connected to the horizontal pipe portion, and the control valve CV installed in the pipe portion is connected to the drain pipe 15. After interposing bypass pipe 1
This is an example of connection with No. 4.
【０００９】図４の例では、バイパス管１４はメイン配
管１３から分岐され上方に勾配角αで上立ち上がり次い
で水平に配管され、当該水平の配管部分に組込まれた閉
止弁ＳＶを介在させて再度メイン配管１３に接続した配
管で流量計ＦＭ用のバイパス管である。なお、メイン配
管１３はバイパス管１４の分岐部から水平に配管され次
いで垂直上方に折れ曲げられ、当該垂直の配管部分に組
込まれた流量計ＦＭを介在させた後バイパス管１４と接
続した例である。なお１５はメイン配管１３に接続され
たドレン管である。In the example of FIG. 4, the bypass pipe 14 is branched from the main pipe 13 and rises upward at an inclination angle α and is then horizontally piped. The bypass valve 14 is inserted again in the horizontal pipe portion through a stop valve SV. It is a bypass pipe for the flowmeter FM, which is a pipe connected to the main pipe 13. In the example in which the main pipe 13 is horizontally piped from the branch portion of the bypass pipe 14 and then bent vertically upward, and is connected to the bypass pipe 14 after interposing the flow meter FM incorporated in the vertical pipe portion. is there. Reference numeral 15 is a drain pipe connected to the main pipe 13.
【００１０】図５の例では、メイン配管１３の途中に流
量計ＦＭ及び調節弁ＣＶを組込まれた場合であって、流
量計ＦＭ及び調節弁ＣＶの各々に流量計ＦＭ用のバイパ
ス管１４−１及び調節弁ＣＶ用のバイパス管１４−２を
付設した例である。そして調節弁ＣＶ用のバイパス管１
４−２にはメイン配管１３の分岐部から距離Ｌの位置に
閉止弁ＳＶを介在して水平方向に分岐し再度メイン配管
１３に勾配角αで接続された配管である。なお１５はメ
イン配管１３に接続されたドレン管である。In the example of FIG. 5, the flowmeter FM and the control valve CV are incorporated in the middle of the main pipe 13, and each of the flowmeter FM and the control valve CV has a bypass pipe 14-for the flowmeter FM. 1 and an example in which a bypass pipe 14-2 for the control valve CV is attached. And the bypass pipe 1 for the control valve CV
Reference numeral 4-2 is a pipe which is branched in the horizontal direction at a position of a distance L from the branch portion of the main pipe 13 with a stop valve SV interposed therebetween and is connected to the main pipe 13 again at an inclination angle α. Reference numeral 15 is a drain pipe connected to the main pipe 13.
【００１１】図６の例も、メイン配管１３の途中に流量
計ＦＭ及び調節弁ＣＶを組込まれた場合であって、流量
計ＦＭ及び調節弁ＣＶを跨いでバイパス管１４を付設し
た例である。なお１５はメイン配管１３に接続されたド
レン管である。また上記各例において調節弁ＣＶに代え
てオリフィスタイプの流量計を用いることも可能であ
る。The example of FIG. 6 is also an example in which the flow meter FM and the control valve CV are incorporated in the middle of the main pipe 13, and the bypass pipe 14 is attached across the flow meter FM and the control valve CV. . Reference numeral 15 is a drain pipe connected to the main pipe 13. Further, in each of the above examples, it is possible to use an orifice type flow meter instead of the control valve CV.
【００１２】メイン配管１３から立上がったバイパス管
１４が、メイン配管１３となす勾配角αはその鋭角側で
３〜９０°に設定するとよい。この勾配角αが前記規定
値を外れると本発明の効果が十分に得られないことがあ
る。更に、メイン配管１３から水平に分岐して閉止弁Ｓ
Ｖを介在してバイパス管１４を設ける場合において、メ
イン配管１３の分岐部から閉止弁ＳＶまでの距離Ｌは、
５０ｃｍ、好ましくは３０ｃｍ以内に設定するとよい。
この距離が短い場合はメイン配管内の液体の流れや温度
差によって当該分岐部内で循環が生じて液体は更新され
るが、分岐部の距離Ｌが長い場合は液が長時間滞留して
更新されない状態になるため重合が生じ閉塞が生じやす
くなって好ましくないので、このＬを５０ｃｍ以内にす
るとよい。The gradient angle α formed by the bypass pipe 14 rising from the main pipe 13 with the main pipe 13 is preferably set to 3 to 90 ° on the acute angle side. If the gradient angle α deviates from the specified value, the effect of the present invention may not be sufficiently obtained. Further, the main pipe 13 is branched horizontally to close the stop valve S.
When the bypass pipe 14 is provided with V interposed, the distance L from the branch portion of the main pipe 13 to the shutoff valve SV is
It may be set within 50 cm, preferably within 30 cm.
When this distance is short, circulation occurs in the branch portion due to the flow of the liquid in the main pipe and the temperature difference, and the liquid is renewed, but when the distance L of the branch portion is long, the liquid stays for a long time and is not renewed. This is not preferable because polymerization occurs and clogging is likely to occur because of the state, so this L is preferably within 50 cm.
【００１３】図７は従来例のバイパス管の付設方法の例
である。図７において、１３は水平に配管されたメイン
配管であって、当該メイン配管１３の途中にはドレン管
１５が接続されていると共に調節弁ＣＶが組込まれてい
る。１４はバイパス管であって、調節弁ＣＶの上流側の
メイン配管１３から実線で示す如くた下方に分岐されさ
らに水平に折り曲げられ、当該水平の部分に組み込まれ
た閉止弁ＳＶを介在して調節弁ＣＶを跨いでメイン配管
１３に再度接続された調節弁ＣＶ用のバイパス管とした
付設方法の従来例である。なお、バイパス管１４は点線
で示す如くに水平方向に配管されて調節弁ＣＶ用のバイ
パス管とした付設方法の従来例も見られる。FIG. 7 shows an example of a conventional method of attaching a bypass pipe. In FIG. 7, reference numeral 13 is a horizontal main pipe, and a drain pipe 15 is connected in the middle of the main pipe 13 and a control valve CV is incorporated therein. Reference numeral 14 denotes a bypass pipe, which is branched downward from the main pipe 13 on the upstream side of the control valve CV as shown by a solid line, is further bent horizontally, and is adjusted via a stop valve SV incorporated in the horizontal portion. It is a conventional example of an attached method which is a bypass pipe for the control valve CV that is reconnected to the main pipe 13 across the valve CV. Note that there is also a conventional example of an attachment method in which the bypass pipe 14 is horizontally piped as shown by a dotted line to form a bypass pipe for the control valve CV.
【００１４】本発明における易重合性化合物とは、反応
または蒸留などの取扱の際に容易に重合して重合体を形
成する化合物を意味し、その代表例としては、（メタ）
アクリル酸およびそのエステル、例えばメチル、エチ
ル、ブチル、イソブチル、ターシャリーブチル、２−エ
チルヘキシル、２−ヒドロキシエチル、２−ヒドロキシ
プロピル、メトキシエチル等を挙げることができる。The easily polymerizable compound in the present invention means a compound which is easily polymerized to form a polymer during handling such as reaction or distillation, and a typical example thereof is (meth).
Acrylic acid and its esters such as methyl, ethyl, butyl, isobutyl, tert-butyl, 2-ethylhexyl, 2-hydroxyethyl, 2-hydroxypropyl, methoxyethyl and the like can be mentioned.
【００１５】[0015]
【実施例】実施例１
アクリル酸製造プロセスの例を示す。図５において、流
量計ＦＭ用のバイパス管１４−１は、流量計ＦＭの流入
側のメイン配管１３の水平部分より分岐して上方に勾配
角α＝９０°で立ち上げ閉止弁ＳＶを介在させて流量計
ＦＭの流出側のメイン配管１３部分に直角に接続した。
一方、調節弁ＣＶ用のバイパス管１４−２は、調節弁Ｃ
Ｖの流入側のメイン配管１３の水平部分より水平に分岐
し、分岐部よりＬ＝３０ｃｍの水平部分に閉止弁ＳＶを
介在させ、次いで当該バイパス管１４−２を垂下して調
節弁ＣＶの流出側のメイン配管１３の水平部分に勾配角
α＝９０°で接続した。高沸分離器Ｃの抜き出し組成
は、アクリル酸６０重量％、アクリル酸ダイマー２５重
量％、無水マレイン酸８重量％で、温度は８０℃であっ
た。３ヶ月運転後、流量計ＦＭの閉塞が見られたので、
交換作業の間、バイパス管１４−１に抜き出し液を通し
て運転を継続した。バイパス管１４−１での閉塞は無く
その後流量計ＦＭの復旧した後、計６ヶ月運転を継続す
ることができた。EXAMPLES Example 1 An example of an acrylic acid production process is shown. In FIG. 5, the bypass pipe 14-1 for the flow meter FM branches from the horizontal portion of the main pipe 13 on the inflow side of the flow meter FM and rises upward at a gradient angle α = 90 ° to interpose a stop valve SV. And connected at right angles to the main pipe 13 part on the outflow side of the flow meter FM.
On the other hand, the bypass pipe 14-2 for the control valve CV is the control valve C.
It branches horizontally from the horizontal portion of the main pipe 13 on the inflow side of V, and the stop valve SV is interposed in the horizontal portion of L = 30 cm from the branch portion, and then the bypass pipe 14-2 is hung down to flow out the control valve CV. It was connected to the horizontal portion of the main pipe 13 on the side at a gradient angle α = 90 °. The extraction composition of the high boiling separator C was 60% by weight of acrylic acid, 25% by weight of acrylic acid dimer, and 8% by weight of maleic anhydride, and the temperature was 80 ° C. After running for 3 months, the flowmeter FM was blocked, so
During the replacement work, the liquid was extracted through the bypass pipe 14-1 to continue the operation. There was no blockage in the bypass pipe 14-1, and after the flowmeter FM was restored after that, operation could be continued for a total of 6 months.
【００１６】実施例２
アクリル酸ブチルの製造プロセスの例を示す。図３にお
いて、バイパス管１４の水平部分に組込まれた閉止弁Ｓ
Ｖは、当該バイパス管１４の分岐部分から３０ｃｍのと
ころに設置し、次いでバイパス管１４はメイン配管１３
に対して垂直（勾配角α＝９０°）に接続した。高沸分
解反応器Ｄの抜き出し組成は、アクリル酸７重量％（ア
クリル酸ダイマーは含まれない）、ブトキシプロピオン
酸ブチル６８重量％、アクリル酸ブチル１１重量％、そ
の他（ポリマー、或いは禁止剤等）１４重量％、温度は
１４０℃であった。５ヶ月運転後、調節弁ＣＶの閉塞が
見られたので、交換作業の間、バイパス管１４に抜き出
し液を通して運転を継続した。バイパス管１４での閉塞
は無くその後調節弁ＣＶを復旧した後、計１０ヶ月運転
を継続することができた。Example 2 An example of a process for producing butyl acrylate will be shown. In FIG. 3, the stop valve S incorporated in the horizontal portion of the bypass pipe 14
V is installed at a position 30 cm from the branch portion of the bypass pipe 14, and then the bypass pipe 14 is connected to the main pipe 13
Was connected perpendicularly (gradient angle α = 90 °). The composition of the high boiling decomposition reactor D extracted was 7% by weight of acrylic acid (excluding acrylic acid dimer), 68% by weight of butyl butoxypropionate, 11% by weight of butyl acrylate, and others (polymer or inhibitor). It was 14% by weight and the temperature was 140 ° C. After the operation for 5 months, the control valve CV was found to be blocked, so during the replacement work, the liquid was extracted through the bypass pipe 14 to continue the operation. There was no blockage in the bypass pipe 14, and after the control valve CV was restored after that, the operation could be continued for a total of 10 months.
【００１７】比較例１
図７の実線に示す如く調節弁ＣＶ用のバイパス管１４
を、メイン配管１３の水平より下方に付設し、実施例１
と同様に運転を行った。３ヶ月運転後、調節弁ＣＶの閉
塞が見られたので、交換作業の間、バイパス管１４に抜
き出し液を通して運転を行ったところバイパス管１４で
の閉塞がみられ、運転を停止しなければならなかった。Comparative Example 1 Bypass pipe 14 for control valve CV as shown by the solid line in FIG.
Example 1 is attached below the horizontal of the main pipe 13.
It was operated in the same manner as in. After the operation for 3 months, the control valve CV was found to be blocked. During the replacement work, when the operation was performed by passing the liquid through the bypass pipe 14, the bypass pipe 14 was blocked and the operation had to be stopped. There wasn't.
【００１８】[0018]
【発明の効果】本発明のバイパス管の付設方法を使用す
れば、（メタ）アクリル酸などの易重合性物を移送する
配管設備において、バイパス管での閉塞の発生を効果的
に防止し当該移送配管設備に組込まれている流量計、調
節弁等の機器での閉塞時にも、運転を継続することがで
きるので、生産量の減少を防ぎ工業的に極めて大きな利
益をもたらす。INDUSTRIAL APPLICABILITY By using the method for attaching a bypass pipe of the present invention, it is possible to effectively prevent the occurrence of blockage in the bypass pipe in piping equipment for transferring easily polymerizable substances such as (meth) acrylic acid. Since the operation can be continued even when the equipment such as a flow meter and a control valve incorporated in the transfer pipe facility is blocked, it is possible to prevent a decrease in the production amount and bring an extremely great industrial advantage.
【図１】易重合性化合物であるアクリル酸を製造するプ
ロセスフローの概略図。FIG. 1 is a schematic diagram of a process flow for producing acrylic acid which is an easily polymerizable compound.
【図２】本発明のバイパス管の付設方法の実例１の概略
図。FIG. 2 is a schematic diagram of Example 1 of the method for attaching a bypass pipe of the present invention.
【図３】本発明のバイパス管の付設方法の実例２の概略
図。FIG. 3 is a schematic diagram of Example 2 of the method for attaching a bypass pipe of the present invention.
【図４】本発明のバイパス管の付設方法の実例３の概略
図。FIG. 4 is a schematic view of Example 3 of the method for attaching a bypass pipe of the present invention.
【図５】本発明のバイパス管の付設方法の実例４の概略
図。FIG. 5 is a schematic view of Example 4 of the method for attaching a bypass pipe of the present invention.
【図６】本発明のバイパス管の付設方法の実例５の概略
図。FIG. 6 is a schematic view of Example 5 of a method for attaching a bypass pipe of the present invention.
【図７】従来のバイパス管の付設方法の従来例の概略
図。FIG. 7 is a schematic view of a conventional example of a conventional method of attaching a bypass pipe.
Ａ…アクリル酸捕集塔 Ｂ…蒸留塔 Ｃ…高沸分離塔 Ｄ…高沸分解反応器 ＦＭ…流量計 ＣＶ…調節弁 １３…メイン配管 １４、１４−１、１４−２…バイパス管 １５…ドレン管 α…バイパス管の立上がり勾配角 A ... Acrylic acid collection tower B ... Distillation tower C ... High boiling separation tower D ... High boiling decomposition reactor FM ... Flowmeter CV ... Control valve 13 ... Main piping 14, 14-1, 14-2 ... Bypass pipe 15 ... Drain pipe α: Rise angle of bypass pipe
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小川 寧之 三重県四日市市東邦町１番地 三菱化学株 式会社内 (72)発明者 鈴木 芳郎 三重県四日市市東邦町１番地 三菱化学株 式会社内 Ｆターム(参考） 4G075 AA13 AA51 AA52 BB10 BD16 DA01 DA18 EB21 4H006 AA05 BS10 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yasuyuki Ogawa 1 Toho-cho, Yokkaichi-shi, Mie Mitsubishi Chemical Corporation Inside the company (72) Inventor Yoshiro Suzuki 1 Toho-cho, Yokkaichi-shi, Mie Mitsubishi Chemical Corporation Inside the company F term (reference) 4G075 AA13 AA51 AA52 BB10 BD16 DA01 DA18 EB21 4H006 AA05 BS10
Claims (7)
メイン配管にバイパス管を付設するに際し、当該バイパ
ス管の少なくとも一部分がメイン配管より上方に立上が
った位置に設けられていることを特徴とするバイパス管
の付設方法。1. A transfer piping facility for an easily polymerizable compound,
When attaching a bypass pipe to a main pipe, at least a part of the bypass pipe is provided at a position rising above the main pipe.
ン配管の途中に組込まれた流量計または調節弁より上方
に立上がった位置に設けられていることを特徴とする請
求項１記載のバイパス管の付設方法。2. The bypass pipe according to claim 1, wherein at least a part of the bypass pipe is provided at a position rising above a flow meter or a control valve incorporated in the middle of the main pipe. Attaching method.
パス管を設けたことを特徴とする請求項２記載のバイパ
ス管の付設方法。3. The method for attaching a bypass pipe according to claim 2, wherein a bypass pipe is provided so as to extend over the flow meter or the control valve.
なくとも一方は、メイン配管より上方に勾配角αを有し
て立上がっていることを特徴とする請求項１〜３記載の
バイパス管の付設方法。4. The bypass pipe according to claim 1, wherein at least one of the branch portion and the connection portion of the bypass pipe is erected above the main pipe with a slope angle α. Method.
°であることを特徴とする請求項４記載のバイパス管の
付設方法。5. The bypass pipe has a rising gradient angle α of 3 to 90.
5. The method of attaching a bypass pipe according to claim 4, wherein the bypass pipe is attached.
さ位置から分岐させると共に、当該同一高さに位置する
バイパス管の部分に閉止弁が組込まれていることを特徴
とする請求項１〜５記載のバイパス管の付設方法。6. One of the bypass pipes is branched from the same height position as the main pipe, and a stop valve is incorporated in a portion of the bypass pipe located at the same height. The method of attaching a bypass pipe according to item 5.
び／又はそのエステルであることを特徴とする請求項１
〜６記載のバイパス管の付設方法。7. The easily polymerizable compound is (meth) acrylic acid and / or its ester, wherein
~ The method of attaching a bypass pipe according to item 6.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001368496A JP5008237B2 (en) | 2001-12-03 | 2001-12-03 | (Meth) acrylic acid and / or its ester transfer pipe installation method |
| PCT/JP2002/012670 WO2003048632A1 (en) | 2001-12-03 | 2002-12-03 | Pipeline transportation method for lase-of-polymerization liquid |
| CNB028201299A CN1276210C (en) | 2001-12-03 | 2002-12-03 | Pipeline transportation method for lase-of-polymerization liquid |
| AU2002349699A AU2002349699A1 (en) | 2001-12-03 | 2002-12-03 | Pipeline transportation method for lase-of-polymerization liquid |
| CNB2004100492464A CN1278070C (en) | 2001-12-03 | 2002-12-03 | Method for transporting easily polymerizable liquid by pipeline |
| US10/856,804 US7080654B2 (en) | 2001-12-03 | 2004-06-01 | Method for transporting easily polymerizable liquid by pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001368496A JP5008237B2 (en) | 2001-12-03 | 2001-12-03 | (Meth) acrylic acid and / or its ester transfer pipe installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003171343A true JP2003171343A (en) | 2003-06-20 |
| JP5008237B2 JP5008237B2 (en) | 2012-08-22 |
Family
ID=19178078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001368496A Expired - Lifetime JP5008237B2 (en) | 2001-12-03 | 2001-12-03 | (Meth) acrylic acid and / or its ester transfer pipe installation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5008237B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003074461A1 (en) * | 2002-03-06 | 2003-09-12 | Mitsubishi Rayon Co., Ltd. | Method of managing easily polymerizable substance and easily polymerizable substance managing apparatus |
| JP2013516440A (en) * | 2010-01-06 | 2013-05-13 | ビーエーエスエフ ソシエタス・ヨーロピア | Method for transporting (meth) acrylic monomer-containing liquid stream F |
-
2001
- 2001-12-03 JP JP2001368496A patent/JP5008237B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003074461A1 (en) * | 2002-03-06 | 2003-09-12 | Mitsubishi Rayon Co., Ltd. | Method of managing easily polymerizable substance and easily polymerizable substance managing apparatus |
| US7552740B2 (en) | 2002-03-06 | 2009-06-30 | Mitsubishi Rayon Co., Ltd. | Method of managing easily polymerizable substance and easily polymerizable substance managing apparatus |
| JP2013516440A (en) * | 2010-01-06 | 2013-05-13 | ビーエーエスエフ ソシエタス・ヨーロピア | Method for transporting (meth) acrylic monomer-containing liquid stream F |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5008237B2 (en) | 2012-08-22 |
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