JPH0651081B2 - How to operate the distillation column - Google Patents
How to operate the distillation columnInfo
- Publication number
- JPH0651081B2 JPH0651081B2 JP59246900A JP24690084A JPH0651081B2 JP H0651081 B2 JPH0651081 B2 JP H0651081B2 JP 59246900 A JP59246900 A JP 59246900A JP 24690084 A JP24690084 A JP 24690084A JP H0651081 B2 JPH0651081 B2 JP H0651081B2
- Authority
- JP
- Japan
- Prior art keywords
- distillation column
- refrigerator
- temperature
- refrigerant
- load
- 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 - Lifetime
Links
Landscapes
- Polymerisation Methods In General (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は蒸留塔の運転方法に関する。詳しくは蒸留塔凝
縮部での凝縮液の温度を一定として効率的に蒸留塔を運
転制御する方法に関する。TECHNICAL FIELD The present invention relates to a method for operating a distillation column. More specifically, the present invention relates to a method for efficiently controlling the operation of the distillation column by keeping the temperature of the condensate in the distillation column condensing unit constant.
従来の技術 蒸留塔で混合物を分離する際に、化合物が比較的低沸点
物である場合、或は分解性である場合などには凝縮部で
の冷却には、冷凍器で冷却した冷媒を用いて行われる。
この際、凝縮部での冷却が不充分であると蒸留塔で分離
される化合物を損失することになり、又冷却を必要以上
行うことは、冷部のための冷媒及び蒸気発生のための加
熱エネルギーを無駄に消費することになり好ましくない
ため、蒸留塔の負荷及び蒸留塔に導入される混合物の組
成が一定であるか、或は少くとも長期間は一定である場
合には冷媒の温度及び流量をほぼ一定に保つことで効率
よく蒸留することが可能である。しかしながら重合工程
などから回収される単量体、溶剤などの蒸留において
は、蒸留塔の負荷及び混合物の組成が大きく変動するた
め、凝縮部への冷媒の供給量を弁の弁開度を凝縮液の温
度と相関させて変動することで蒸留塔を安定に運転する
ことが行われている。Conventional technology When separating a mixture in a distillation column, if the compound has a relatively low boiling point or is decomposable, use the refrigerant cooled in the refrigerator for cooling in the condensation section. Is done.
At this time, if the cooling in the condenser is insufficient, the compounds separated in the distillation column will be lost, and excessive cooling will result in a refrigerant for the cold section and a heating for generating steam. Since energy is wasted and it is not preferable, the temperature of the refrigerant and the composition of the mixture introduced into the distillation column are constant or at least constant for a long period of time. Efficient distillation can be achieved by keeping the flow rate almost constant. However, in the distillation of monomers, solvents, etc. recovered from the polymerization process, etc., the load on the distillation column and the composition of the mixture fluctuate greatly, so the amount of refrigerant supplied to the condenser is controlled by the valve opening of the condensate. The distillation column is operated stably by changing in correlation with the temperature of.
発明が解決しようとする問題点 しかしながら上記の方法では、冷凍器は冷凍器単独で一
定温度の冷媒が一定量供給できるように制御され、又蒸
留塔の凝縮部では凝縮液の温度によつて凝縮部への冷媒
の供給量が制御されるため不要の冷媒はバイパスライン
より冷凍器へもどることになるため、冷媒の供給量が減
少した時は冷凍器の負荷は若干減少するもののかなりの
エネルギーの損失がある上制御系が複雑であるという問
題があつた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above method, the refrigerator is controlled such that the refrigerator alone can supply a constant amount of the constant temperature refrigerant, and the condenser of the distillation column condenses according to the temperature of the condensate. Since the amount of refrigerant supplied to the cooling unit is controlled, unnecessary refrigerant will return to the refrigerator from the bypass line.When the amount of refrigerant supplied decreases, the load on the refrigerator will decrease slightly, but a considerable amount of energy will be consumed. There was a problem that there was a loss and the control system was complicated.
本発明者らは、エネルギーの消費量が少くしかも制御性
よく蒸留塔を運転する方法について検討した結果、特定
の制御法を採用することで上記の問題が解決できること
を見い出し本発明を完成した。As a result of studying a method of operating a distillation column with low energy consumption and good controllability, the present inventors have found that the above problems can be solved by adopting a specific control method, and completed the present invention.
本発明の目的は、効率より蒸留塔を運転する方法を提供
することにある。An object of the present invention is to provide a method of operating a distillation column with high efficiency.
問題点を解決するための手段 即ち本発明は、冷凍器により冷却された冷媒を用いて蒸
留塔の凝縮部を冷却する方法において、冷凍器をオン−
オフすることなく冷凍器の負荷を蒸留塔の凝縮液の温度
により制御することを特徴とする蒸留塔の制御方法に関
する。Means for Solving the Problems That is, the present invention relates to a method for cooling a condenser of a distillation column by using a refrigerant cooled by a refrigerator, turning on the refrigerator.
The present invention relates to a method for controlling a distillation column, characterized in that the load of the refrigerator is controlled by the temperature of the condensate in the distillation column without turning off.
本発明において蒸留塔で蒸留分離される混合物について
は、発明の構成より明らかなように格別限定はないが、
１０℃以下特に０℃以下の冷媒を用いて凝縮液を３０℃
以下に冷却して蒸留する必要のある混合物と蒸留圧力の
条件下の蒸留塔の運転に適用すると効果が大である。The mixture to be distilled and separated in the distillation column in the present invention is not particularly limited, as is clear from the constitution of the invention,
The condensate is 30 ° C using a refrigerant of 10 ° C or less, especially 0 ° C or less
The effect is large when applied to the operation of the distillation column under the conditions of the mixture and the distillation pressure which need to be cooled and distilled below.
本発明の態様を図面に従つて説明する。第１図及び第２
図は本発明の態様の１例であり、第３図は従来の方法を
示す。Aspects of the present invention will be described with reference to the drawings. 1 and 2
The figure is an example of an aspect of the present invention, and FIG. 3 shows a conventional method.
第１図を用いて説明する。蒸留塔上部より抜きだされた
蒸気は凝縮器４で冷却され凝縮液は還流される。液の温
度は５で検知され制御器３で設定温度と比較して、設定
温度と一致するように冷凍器２の負荷を変える信号が出
力され、冷凍器２の負荷が変えられる（具体的にはフレ
オン、アンモニア等の圧縮器の負荷を変える）。冷凍器
としては、往復動式冷凍機、回転式冷凍機などの負荷が
比較的変動させやすい形式のものが好ましい。This will be described with reference to FIG. The vapor extracted from the upper part of the distillation column is cooled by the condenser 4 and the condensate is refluxed. The temperature of the liquid is detected by 5, and the controller 3 compares the set temperature with the set temperature and outputs a signal for changing the load of the refrigerator 2 so as to match the set temperature (specifically, the load of the refrigerator 2 is changed. Changes the load on the compressor such as Freon and ammonia). As the refrigerator, it is preferable to use a reciprocating refrigerator, a rotary refrigerator or the like in which the load is relatively variable.
設定温度と一致するように冷凍器２の負荷を変える信号
が出力され、冷凍器２で作られた冷媒は凝縮器４（蒸発
室として機能する）で気化し蒸留塔上部よりの蒸気が凝
縮される。A signal for changing the load of the refrigerator 2 is output so as to match the set temperature, the refrigerant produced in the refrigerator 2 is vaporized in the condenser 4 (functioning as an evaporation chamber), and the vapor from the upper part of the distillation column is condensed. It
本発明の別の態様を第２図に示す。凝縮器４の冷媒とし
ては、冷凍器２で作られた冷媒の蒸発熱によつて冷却さ
れたブラインを用いて行われる。冷却されたブラインは
ポンプ７より凝縮器４に送られ蒸気を冷却凝縮する。凝
縮液の温度は５で検知され、温度に比例した信号を制御
器３に入力し設定温度と比較して２の負荷が変えられ
る。冷凍器で作られた冷媒は膨張弁６を経て蒸発室１０
で気化しブラインが冷却され凝縮液の温度が一定となる
ようにブラインの温度が調節される。Another aspect of the present invention is shown in FIG. As the refrigerant of the condenser 4, brine cooled by the heat of vaporization of the refrigerant produced in the refrigerator 2 is used. The cooled brine is sent from the pump 7 to the condenser 4 to cool and condense the steam. The temperature of the condensate is detected at 5, and a signal proportional to the temperature is input to the controller 3 and the load of 2 is changed in comparison with the set temperature. The refrigerant made in the refrigerator passes through the expansion valve 6 and the evaporation chamber 10
The brine temperature is adjusted so that the brine is cooled and the temperature of the condensate becomes constant.
本発明において冷凍器の負荷の制御は、冷凍器をオン−
オフすることで行ってはならない。なぜなら大型の冷凍
器のオン−オフは過大な電力を損失するだけでなく、同
一の電力系統にある他の装置に影響を与えるからであ
る。従って制御の範囲は予想される負荷の変動に耐える
範囲で設計された装置の負荷の変動範囲に限られるべき
である。In the present invention, the refrigerator load is controlled by turning on the refrigerator.
Don't go off. This is because turning a large refrigerator on and off not only causes excessive power loss, but also affects other devices in the same power system. Therefore, the range of control should be limited to the load variation range of the device designed to withstand the expected load variation.
第３図に従来の方法を示す。冷凍器２はブラインの温度
（温度計１１で検知）が一定になるように制御され一定
温度のブラインが作られる。ブラインはポンプによつて
凝縮器に送られ、蒸留塔上部からの蒸気が冷却凝縮され
る。温度計５で検知された温度に比例した信号は制御器
３に入力され設定温度と比較し凝縮器へのラインの弁８
及びバイパスラインの弁９の弁開度を変える信号を出力
し、一定温度の凝縮温度となるように制御される。FIG. 3 shows a conventional method. The refrigerator 2 is controlled so that the temperature of the brine (detected by the thermometer 11) becomes constant, and the brine having a constant temperature is produced. The brine is sent to the condenser by the pump, and the vapor from the upper part of the distillation column is cooled and condensed. A signal proportional to the temperature detected by the thermometer 5 is input to the controller 3 and compared with the set temperature, and the valve 8 on the line to the condenser is connected.
And a signal for changing the valve opening degree of the valve 9 of the bypass line is output to control the condensing temperature to a constant temperature.
従来の方法では制御系が複雑である上にブラインを無駄
に循環しており大きなエネルギーを損失することにな
る。In the conventional method, the control system is complicated and the brine is wastefully circulated, resulting in a large loss of energy.
上記説明より明らかなように、凝縮液が凍結する問題が
ない場合は、第１図に示す方がより少ないエネルギーで
運転できより好ましい。As is clear from the above description, when there is no problem of freezing of the condensate, the method shown in FIG. 1 is more preferable because it can be operated with less energy.
発明の効果 本発明の方法を実施することにより少ないエネルギーで
蒸留塔を効率的に制御性良く運転することができ工業的
に価値がある。Effects of the Invention By carrying out the method of the present invention, the distillation column can be efficiently operated with good controllability with a small amount of energy, and is industrially valuable.
第１図及び第２図は本発明の方法を実施する装置の模式
図の１例であり、前者は直接冷却タイプであり、後者は
間接冷却タイプである。第３図は従来の方法を実施する
場合の装置の模式図の１例である。FIG. 1 and FIG. 2 are examples of schematic views of an apparatus for carrying out the method of the present invention, the former is a direct cooling type and the latter is an indirect cooling type. FIG. 3 is an example of a schematic diagram of an apparatus for carrying out a conventional method.
Claims (1)
塔の凝縮部を冷却する方法において、冷凍器をオン−オ
フすることなく冷凍器の負荷を蒸留塔の凝縮液の温度に
より制御することを特徴とする蒸留塔の運転方法。1. A method for cooling a condenser of a distillation column by using a refrigerant cooled by the refrigerator, wherein the load of the refrigerator is controlled by the temperature of the condensate of the distillation column without turning on / off the refrigerator. A method of operating a distillation column, which is characterized in that
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59246900A JPH0651081B2 (en) | 1984-11-21 | 1984-11-21 | How to operate the distillation column |
| CN85104853A CN85104853B (en) | 1984-11-21 | 1985-06-20 | Countercurrent washing column continuous operation method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59246900A JPH0651081B2 (en) | 1984-11-21 | 1984-11-21 | How to operate the distillation column |
| CN85104853A CN85104853B (en) | 1984-11-21 | 1985-06-20 | Countercurrent washing column continuous operation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61125403A JPS61125403A (en) | 1986-06-13 |
| JPH0651081B2 true JPH0651081B2 (en) | 1994-07-06 |
Family
ID=36693045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59246900A Expired - Lifetime JPH0651081B2 (en) | 1984-11-21 | 1984-11-21 | How to operate the distillation column |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0651081B2 (en) |
| CN (1) | CN85104853B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7960503B2 (en) * | 2009-05-26 | 2011-06-14 | Solutia, Inc. | Continuous washing of poly(vinyl butyral) |
| KR20140144191A (en) * | 2012-03-23 | 2014-12-18 | 다이헤이요 세멘토 가부시키가이샤 | Continuous gas reaction device, and continuous dissolved gas reaction device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6034403B2 (en) * | 1976-11-13 | 1985-08-08 | 日本鉱業株式会社 | Regeneration tower top gas cooling device for wastewater treatment equipment |
| JPS5428271A (en) * | 1977-08-04 | 1979-03-02 | Mitsubishi Electric Corp | Condensing apparatus for moisture in gas |
-
1984
- 1984-11-21 JP JP59246900A patent/JPH0651081B2/en not_active Expired - Lifetime
-
1985
- 1985-06-20 CN CN85104853A patent/CN85104853B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85104853A (en) | 1986-12-17 |
| CN85104853B (en) | 1987-02-25 |
| JPS61125403A (en) | 1986-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |