JPH0320133B2 - - Google Patents
Info
- Publication number
- JPH0320133B2 JPH0320133B2 JP14303786A JP14303786A JPH0320133B2 JP H0320133 B2 JPH0320133 B2 JP H0320133B2 JP 14303786 A JP14303786 A JP 14303786A JP 14303786 A JP14303786 A JP 14303786A JP H0320133 B2 JPH0320133 B2 JP H0320133B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- main body
- liquid level
- treated
- stirring
- 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.)
- Expired
Links
- 239000007788 liquid Substances 0.000 claims description 76
- 238000003756 stirring Methods 0.000 claims description 26
- 238000000605 extraction Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000005187 foaming Methods 0.000 description 20
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- -1 polybutylene terephthalate Polymers 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000012643 polycondensation polymerization Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Polyesters Or Polycarbonates (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、発泡が起りやすい高粘度物質の連続
処理方法及び装置に係り、特に、ポリブチレンテ
レフタレート等の高粘度熱可塑性樹脂の連続縮重
合に好適な処理方法及び装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for continuous processing of high viscosity substances that are prone to foaming, and in particular, to continuous condensation polymerization of high viscosity thermoplastic resins such as polybutylene terephthalate. The present invention relates to a processing method and apparatus suitable for.
従来の高粘度性物質の連続処理装置は、特公昭
60−29733号に記載のように、出口液の重合度を
調節するため、真空圧力調節弁の開度を変更して
装置内の圧力を制御するようになつていた。しか
しながら、装置本体内が減圧される際に発泡して
液面が異常に増加する場合の対策については配慮
されていなかつた。そして、１万ポアズを越える
ような超高粘度液（例えば高分子量ポリブチレン
テレフタレート等）を連続縮重合する場合には、
粘度が高いため被処理液の内部で発生した気泡
は、液表面に容易に移動できず、内部で膨張して
液全体を持ち上げ、特に問題となる。
Conventional continuous processing equipment for high viscosity substances is
As described in No. 60-29733, in order to adjust the degree of polymerization of the outlet liquid, the pressure inside the device was controlled by changing the opening degree of a vacuum pressure control valve. However, no consideration was given to countermeasures against the case where the liquid level abnormally increases due to foaming when the inside of the device body is depressurized. When ultra-high viscosity liquids exceeding 10,000 poise (such as high molecular weight polybutylene terephthalate) are subjected to continuous condensation polymerization,
Due to its high viscosity, bubbles generated inside the liquid to be treated cannot easily move to the surface of the liquid, but expand inside and lift the entire liquid, which poses a particular problem.
上記従来技術は、装置本体内が減圧される際に
発生する発泡、特に液の内部からの発泡に対して
は配慮がされておらず、装置本体内の減圧により
発泡して液面が上昇し、減圧装置を閉そくさせる
等の問題があつた。
The above conventional technology does not take into account foaming that occurs when the pressure inside the device body is reduced, especially foaming from inside the liquid. There were problems such as blocking the decompression device.
本発明の目的は、このような発泡による液面の
異常増加を検知して、減圧配管の閉そく等を防止
することにある。 An object of the present invention is to detect such an abnormal increase in the liquid level due to foaming and to prevent blockage of the decompression pipe.
上記目的は、液面高さと撹拌動力とを検知し
て、撹拌動力よりホールドアツプ量を演算して異
常発泡の無い状態での液面高さの推算値を求め、
この液面高さ推算値と前記液表面高さ検出値とを
比較して発泡による液面上昇の有無を確認し、真
空圧力を制御することにより達成される。
The above purpose is to detect the liquid level height and stirring power, calculate the hold-up amount from the stirring power, and obtain the estimated value of the liquid level height in a state where there is no abnormal foaming.
This is achieved by comparing this estimated liquid level height value with the detected liquid surface height value to confirm whether or not the liquid level has risen due to foaming, and then controlling the vacuum pressure.
本発明の高粘度液処理装置に取り付けられた演
算器は、あらかじめ設定してある撹拌動力と異常
発泡の無い状態での液面高さとの関係式により、
撹拌動力の入力値から液面高さを求め、これと液
表面高さ検出値との差を計算し、この値の差が所
定値以上の場合、発泡による液面上昇と判断し
て、真空圧力を上げることにより異常な発泡を未
然に防止できる。
The computing unit installed in the high viscosity liquid processing apparatus of the present invention calculates the following using the preset relational expression between the stirring power and the liquid level height in the absence of abnormal foaming.
The liquid level height is determined from the input value of the stirring power, and the difference between this and the detected liquid surface height is calculated. If the difference between these values is greater than a predetermined value, it is determined that the liquid level has risen due to foaming, and the vacuum is removed. By increasing the pressure, abnormal foaming can be prevented.
以下、本発明の一実施例を第１図、第２図によ
り説明する。第１図、第２図において、１は処理
装置の本体で、第２図に示す断面を持つ横長円筒
状容器であり、熱媒ジヤケツト（図示せず）で外
周を覆われている。本体１内の長手方向に撹拌部
材２が２本設置され、回転軸３を通して駆動モー
タ４により回転される。本実施例では、撹拌部材
２には矩形わく状構造のものが用いられている。
本体１の一端下部には被処理液の入口ノズル５が
設けられ、他端下部には被処理液の抜出スクリユ
ー６および出口ノズル７が設けられている。抜出
スクリユー６は回転数可変モータ１２により駆動
される。また、本体１の上部には揮発物の出口ノ
ズル８が取りつけられ、配管により揮発物の凝縮
器９、流量調節弁１０、真空ポンプ１１に接続さ
れている。本体１内の上部空間には液面計１３が
取り付けられ、本実施例では静電容量式の液面計
が用いられている。さらに、駆動モータ４には撹
拌動力測定用の動力計１４が設けられている。１
５は制御装置で、液面計１３および動力計１４か
らの信号を入力し、内部で演算して制御信号を流
量調節弁１０および抜出スクリユー６の回転数可
変モータ１２に出力する。
An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 and 2, reference numeral 1 denotes the main body of the processing apparatus, which is an oblong cylindrical container having a cross section shown in FIG. 2, and the outer periphery of the container is covered with a heat medium jacket (not shown). Two stirring members 2 are installed in the longitudinal direction within the main body 1 and are rotated by a drive motor 4 through a rotating shaft 3. In this embodiment, the stirring member 2 has a rectangular frame-like structure.
An inlet nozzle 5 for the liquid to be treated is provided at the bottom of one end of the main body 1, and an extraction screw 6 and an outlet nozzle 7 for the liquid to be processed are provided at the bottom of the other end. The extraction screw 6 is driven by a variable rotation speed motor 12. Further, an outlet nozzle 8 for volatile matter is attached to the upper part of the main body 1, and is connected to a volatile matter condenser 9, a flow rate control valve 10, and a vacuum pump 11 through piping. A liquid level gauge 13 is attached to the upper space within the main body 1, and in this embodiment, a capacitance type liquid level gauge is used. Further, the drive motor 4 is provided with a dynamometer 14 for measuring stirring power. 1
Reference numeral 5 denotes a control device which inputs signals from a liquid level gauge 13 and a dynamometer 14, calculates it internally, and outputs control signals to the flow rate control valve 10 and the variable rotation speed motor 12 of the extraction screw 6.
制御装置１５では、あらかじめ撹拌動力と液高
さ〔発泡がほとんど無い場合〕との関係式を記憶
させておき、動力計１４からの動力値より液高さ
を計算する。そして、この液高さの計算値と液面
計１３からの信号（測定値）とを比較し、液面計
１３からの信号の方が推算液面高さより大きい場
合、発泡による液面上昇と判断して流量調節弁１
０を閉じて、本体１内の圧力を高める。これによ
り発泡が抑制されて液面の異常上昇が防止され
る。また、推算液面高さの値があらかじめ入力し
ておいた所定値より異なる場合には、抜出スクリ
ユー６の回転可変モータ１２の回転数を増加、ま
たは減少させて、被処理液の抜出流量を調節し、
本体１内のホールドアツプ量を調節する。 The control device 15 stores in advance a relational expression between the stirring power and the liquid height (when there is almost no foaming), and calculates the liquid height from the power value from the dynamometer 14. Then, the calculated value of the liquid height is compared with the signal (measured value) from the liquid level gauge 13, and if the signal from the liquid level gauge 13 is larger than the estimated liquid level height, the liquid level has risen due to foaming. Judgment and flow control valve 1
0 to increase the pressure inside the main body 1. This suppresses foaming and prevents the liquid level from rising abnormally. In addition, if the estimated liquid level height is different from a predetermined value input in advance, the rotation speed of the variable rotation motor 12 of the extraction screw 6 is increased or decreased, and the liquid to be treated is extracted. Adjust the flow rate,
Adjust the amount of hold up in the main body 1.
なお、撹拌動力と液高さ（発泡がほとんど無い
状態）との関係は、撹拌部材２の回転数および被
処理液の粘度が与えられた場合、第３図のように
表わされ、液高さの増加と共に撹拌動力が増加す
る。これにより、撹拌動力をもとに演算によつて
液高さ（発泡がほとんど無い状態の液高さ）を求
めることができる。 The relationship between the stirring power and the liquid height (with almost no foaming) is expressed as shown in Figure 3 when the rotation speed of the stirring member 2 and the viscosity of the liquid to be treated are given. The stirring power increases as the temperature increases. Thereby, the liquid height (liquid height in a state where there is almost no foaming) can be determined by calculation based on the stirring power.
本実施例において、ポリブチレンテレフタレー
ト中間重合物等の被処理液は入口ノズル５より本
体１内に入り、撹拌部材２で撹拌され、真空ポン
プ１１で減圧されて、テトラヒドロフラン等の揮
発物を蒸発分離しながら第１図の左から右に移動
し、高重合物となつて抜出スクリユー６により出
口ノズル７から連続的に排出される。ここで、揮
発物は揮発物出口ノズル８より排出され、凝縮器
９にて捕集される。そして、本体１内の液高さを
液面計１３で検出し、撹拌動力を動力計１４で検
知して、液面の異常上昇を把握し、流量調節弁１
０の調節により本体１内の圧力を変えて、液面上
昇によるトラブルを未然に防止する。また、動力
計１４で検知した撹拌動力より液面高さを推算し
て、抜出スクリユー６の回転数を調節し、本体１
内のホールドアツプ量を制御する。 In this embodiment, a liquid to be treated such as a polybutylene terephthalate intermediate polymer enters the main body 1 through an inlet nozzle 5, is stirred by a stirring member 2, and is depressurized by a vacuum pump 11 to evaporate and separate volatile substances such as tetrahydrofuran. While moving from left to right in FIG. 1, the polymer becomes a highly polymerized product and is continuously discharged from the outlet nozzle 7 by the extraction screw 6. Here, the volatile matter is discharged from the volatile matter outlet nozzle 8 and collected in the condenser 9. Then, the liquid level inside the main body 1 is detected by the liquid level gauge 13, the stirring power is detected by the dynamometer 14, an abnormal rise in the liquid level is detected, and the flow control valve 1
By adjusting the pressure at 0, the pressure inside the main body 1 is changed to prevent troubles caused by a rise in the liquid level. In addition, the liquid level height is estimated from the stirring power detected by the dynamometer 14, the rotation speed of the extraction screw 6 is adjusted, and the main body 1
Controls the amount of hold up within.
本実施例によれば、特に運転開始時および被処
理液流量等の運転条件変更時に問題となる、急激
な発泡による液面上昇を防止することができ、安
定した運転を行なうことができる。また、本体１
内のホールドアツプ制御に対しても、発泡による
液面変動に妨害されることなく、これを行なうこ
とができる。 According to this embodiment, it is possible to prevent the liquid level from rising rapidly due to foaming, which is a problem especially when starting the operation and changing the operating conditions such as the flow rate of the liquid to be treated, so that stable operation can be performed. Also, main body 1
Hold-up control within the tank can also be carried out without being hindered by liquid level fluctuations due to foaming.
本発明の推奨される他の実施例を第４図に示
す。第４図は、本体１の上部に不活性ガスの入口
ノズル１６を設け、開閉制御弁１７を介して不活
性ガス供給源（図示せず）に接続し、この開閉制
御弁１７の開閉を制御装置１５から出力される信
号で行なわせるものである。本実施例では、本体
１内の液高さの検出値（測定値）と撹拌動力より
の液高さの推算値とを比較して、発泡による液面
上昇が認められると、開閉制御弁１７を一時的に
開いて不活性ガス（窒素、アルゴン等）を吹き込
み、液面を低下させる。本実施例によれば、発泡
による液面上昇を急速に押えることができる点に
特有の効果がある。 Another recommended embodiment of the invention is shown in FIG. FIG. 4 shows an inert gas inlet nozzle 16 provided in the upper part of the main body 1, connected to an inert gas supply source (not shown) via an on-off control valve 17, and controlling the opening and closing of this on-off control valve 17. This is done using a signal output from the device 15. In this embodiment, the detected value (measured value) of the liquid height inside the main body 1 is compared with the estimated value of the liquid height based on the stirring power, and if a rise in the liquid level due to foaming is observed, the opening/closing control valve 17 Temporarily open the tank and blow in an inert gas (nitrogen, argon, etc.) to lower the liquid level. This embodiment has a unique effect in that the rise in the liquid level due to foaming can be rapidly suppressed.
本発明によれば、特に液の内部からの発泡等に
よる液面上昇を把握し、減圧操作を制御しながら
運転することができるので、異常な液面上昇を防
止することができ、安定した連続運転を行なうこ
とができる。
According to the present invention, it is possible to grasp the rise in the liquid level due to foaming from inside the liquid, etc., and operate while controlling the depressurization operation, thereby preventing abnormal rises in the liquid level and ensuring stable continuous operation. Able to drive.
第１図は本発明の一実施例を示す高粘度液連続
処理装置の系統図、第２図は第１図の−断面
図、第３図は撹拌動力と液高さとの関係を示す線
図、第４図は本発明の他の実施例を示す高粘度液
連続処理装置の系統図である。
１……処理装置本体、２……撹拌部材、３……
回転軸、４……駆動モータ、５，１６……入口ノ
ズル、６……抜出スクリユー、７，８……出口ノ
ズル、９……凝縮器、１０……流量調節弁、１１
……真空ポンプ、１２……回転数可変モータ、１
３……液面計、１４……動力計、１５……制御装
置、１７……開閉制御弁。
Fig. 1 is a system diagram of a high viscosity liquid continuous processing apparatus showing an embodiment of the present invention, Fig. 2 is a sectional view taken from Fig. 1, and Fig. 3 is a diagram showing the relationship between stirring power and liquid height. , FIG. 4 is a system diagram of a high viscosity liquid continuous processing apparatus showing another embodiment of the present invention. 1... Processing device main body, 2... Stirring member, 3...
Rotating shaft, 4... Drive motor, 5, 16... Inlet nozzle, 6... Extraction screw, 7, 8... Outlet nozzle, 9... Condenser, 10... Flow rate control valve, 11
...Vacuum pump, 12...Variable rotation speed motor, 1
3...Liquid level gauge, 14...Dynamometer, 15...Control device, 17...Opening/closing control valve.
Claims (1)
一端より被処理液を供給し、撹拌部材により撹拌
しながら本体内を減圧して揮発物を蒸発分離し、
本体の他端より被処理液を連続的に排出するよう
にした高粘度液連続処理方法において、液表面高
さと撹拌動力とを検出し、演算により撹拌動力よ
り液面高さの推算値を求め、この液面高さ推算値
と前記液表面高さ検出値とを比較して本体内の真
空圧力を制御することを特徴とする高粘度液連続
処理方法。 ２ 前記液面高さ推算値と液表面高さ検出値とを
比較して本体内の真空圧力を制御すると共に被処
理液の排出流量を制御するようにした特許請求の
範囲第１項記載の高粘度液連続処理方法。 ３ 一端に被処理液の入口ノズルを設け、他端に
被処理液の抜出スクリユーを設けた円筒状本体の
内部に撹拌部材を設け、該本体上部に凝縮器およ
び流量調節弁を介して真空ポンプに接続された揮
発物の出口ノズルを設けた高粘度液連続処理装置
において、本体内の液面を検出する液面計と、前
記撹拌部材の撹拌動力を検出する動力計と、前記
液面計および動力計からの信号を入力し、演算し
て制御信号を前記流量調節弁および前記抜出スク
リユーを駆動する回転数可変モータに出力する制
御装置とを設けたことを特徴とする高粘度液連続
処理装置。[Scope of Claims] 1. A cylindrical main body is provided with a stirring member, a liquid to be treated is supplied from one end of the main body, and volatile substances are evaporated and separated by reducing the pressure inside the main body while stirring with the stirring member,
In a high viscosity liquid continuous processing method in which the liquid to be treated is continuously discharged from the other end of the main body, the liquid surface height and stirring power are detected, and the estimated value of the liquid level height is calculated from the stirring power by calculation. A method for continuously processing a high viscosity liquid, characterized in that the vacuum pressure within the main body is controlled by comparing the estimated liquid level height with the detected liquid surface height. 2. The liquid surface height estimation value and the liquid surface height detection value are compared to control the vacuum pressure within the main body and the discharge flow rate of the liquid to be treated. High viscosity liquid continuous processing method. 3. A stirring member is provided inside the cylindrical body, which has an inlet nozzle for the liquid to be treated at one end and a screw for extracting the liquid to be treated at the other end, and a vacuum In a high viscosity liquid continuous processing apparatus provided with a volatile outlet nozzle connected to a pump, a liquid level gauge for detecting the liquid level in the main body, a dynamometer for detecting the stirring power of the stirring member, and the liquid level and a control device that inputs signals from a meter and a dynamometer, calculates them, and outputs a control signal to the variable rotation speed motor that drives the flow rate control valve and the extraction screw. Continuous processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14303786A JPS63321A (en) | 1986-06-20 | 1986-06-20 | High viscosity liquid continuous processing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14303786A JPS63321A (en) | 1986-06-20 | 1986-06-20 | High viscosity liquid continuous processing method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63321A JPS63321A (en) | 1988-01-05 |
| JPH0320133B2 true JPH0320133B2 (en) | 1991-03-18 |
Family
ID=15329435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14303786A Granted JPS63321A (en) | 1986-06-20 | 1986-06-20 | High viscosity liquid continuous processing method and device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63321A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5249002A (en) * | 1991-11-06 | 1993-09-28 | Allergan, Inc. | Teledioptric system |
-
1986
- 1986-06-20 JP JP14303786A patent/JPS63321A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63321A (en) | 1988-01-05 |
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