JPS63229119A - Control method for preprocessor of air separation plant - Google Patents
Control method for preprocessor of air separation plantInfo
- Publication number
- JPS63229119A JPS63229119A JP62060991A JP6099187A JPS63229119A JP S63229119 A JPS63229119 A JP S63229119A JP 62060991 A JP62060991 A JP 62060991A JP 6099187 A JP6099187 A JP 6099187A JP S63229119 A JPS63229119 A JP S63229119A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- adsorption tower
- signal
- gas pressure
- pressure regulating
- 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
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000000926 separation method Methods 0.000 title claims description 9
- 238000001179 sorption measurement Methods 0.000 claims abstract description 22
- 230000008929 regeneration Effects 0.000 claims description 35
- 238000011069 regeneration method Methods 0.000 claims description 35
- 230000001172 regenerating effect Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 101100441097 Dictyostelium discoideum crlG gene Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
- F25J3/04181—Regenerating the adsorbents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04775—Air purification and pre-cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
- F25J2205/66—Regenerating the adsorption vessel, e.g. kind of reactivation gas
- F25J2205/72—Pressurising or depressurising the adsorption vessel
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、空気分離装置の前処理装置として２塔切替式
吸ｓｑｒを使用する場合に好適な空気分離装置用前処理
装置の制御方法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 for controlling a pretreatment device for an air separation device, which is suitable when a two-column switching suction SQR is used as a pretreatment device for an air separation device. It is something.
従来の装置は、特開昭５８−２１４７７１１）に記載の
ように、吸着塔の再生ガス圧力調節弁は圧力調節装置に
より単にＰＩＤ制御を行っており、２＃ｉ切替使用され
る場合、吸着塔切替時に再生ガ、ス流量が急激に変化す
ることによる再生ガス圧力の変化については配慮されて
いなかった。In the conventional device, as described in JP-A-58-2147711, the regeneration gas pressure control valve of the adsorption tower is simply PID controlled by a pressure control device, and when 2#i switching is used, the adsorption tower No consideration was given to changes in the regeneration gas pressure due to sudden changes in the regeneration gas flow rate at the time of switching.
上記従来技術では、再生ガスの急激な流量変化ｌ二伴う
圧力変動について配慮がされておらず、吸着塔再生工程
終了時に再生ガスが流れなくなるため、急速に圧力が上
昇し、再生工程開始時に再生ガスが流れはじめると、急
速に圧力が降下する現象が生しる。この圧力変動をＰＩ
Ｄ制御だけで調整する場合、圧力の規定値に対する偏差
が大きいため、空気分離装置本体の圧力変動を生じさせ
るという問題があった。In the above conventional technology, no consideration is given to pressure fluctuations accompanying sudden changes in the flow rate of the regeneration gas, and as the regeneration gas stops flowing at the end of the adsorption tower regeneration process, the pressure rises rapidly and the regeneration occurs at the start of the regeneration process. When gas begins to flow, a phenomenon occurs in which the pressure rapidly drops. This pressure fluctuation is PI
When adjusting only by the D control, there is a problem in that the deviation of the pressure from the specified value is large, causing pressure fluctuations in the main body of the air separation device.
本発明の目的は、二の吸着塔再生時の再生ガス圧力の変
動を小さくすることにある。An object of the present invention is to reduce fluctuations in regeneration gas pressure during the second adsorption tower regeneration.
上記目的は、吸４塔の切換を行う切換制御装置から、吸
４塔の再生工程の終了・開始のタイミングを信条として
取出し、再生ガス圧力調節３！置ヘフイードフオワード
信号として入力し、圧力調節弁の開度信号をフィードフ
ォワード信号により。The above purpose is to take out the end/start timing of the regeneration process of the four suction towers from the switching control device that switches the four suction towers, and adjust the regenerated gas pressure 3! The position of the valve is input as a feedforward signal, and the opening signal of the pressure control valve is input as a feedforward signal.
一時的に増加、減少させることにより達成される。This is achieved by temporarily increasing or decreasing it.
吸１１塔の再生ガスを供給しない間、再生ガス圧力調節
弁から、Ｉ＋生ガス流血と向−ｒＩＬ四を流すことによ
り、再生ガスの圧力を一定瘉こ保つことができるため、
吸着塔再生工程終了時に必要となる弁開度となるよう、
フィードフォワード量を再生工程終了時の調節計出力値
に加算する。また、再生工程開始時には古生工程終７時
の弁開度に戻るよう、フィードフォワード量を調節針出
力値に加算する。以上により制御の遅れを防止すること
ができ、再生ガス圧力の変動を小さくすることができる
。While the regeneration gas is not supplied to the suction tower 11, the pressure of the regeneration gas can be kept constant by flowing I + raw gas blood and -rIL4 from the regeneration gas pressure control valve.
To achieve the required valve opening at the end of the adsorption tower regeneration process,
Add the feedforward amount to the controller output value at the end of the regeneration process. Further, at the start of the regeneration process, the feedforward amount is added to the adjustment needle output value so that the valve opening degree returns to the valve opening at 7 hours at the end of the old regeneration process. As described above, delays in control can be prevented and fluctuations in regeneration gas pressure can be reduced.
以下、本発明の一実施例を第１図により説明する。約５
に９／ｃｒｌＧに圧縮された原料空気は、切替弁３人を
通して吸着塔ｌへ送られ、ここで後流の空気分離装置内
で固化する水分および炭酸ガスを吸着除去され、切替弁
３Ａを通して精製空気として空気分離装置＆（図示せず
）へ送られる。一方、再生ガスは、空気分離装置から切
替弁４Ｂを通して吸着塔２へ供給され、吸着塔２を再生
した後切替弁４Ｂを通して大気へ放出される。An embodiment of the present invention will be described below with reference to FIG. Approximately 5
The raw air compressed to 9/crlG is sent to the adsorption tower 1 through 3 switching valves, where moisture and carbon dioxide that solidify in the downstream air separation device are adsorbed and removed, and purified through the switching valve 3A. It is sent as air to an air separator & (not shown). On the other hand, the regeneration gas is supplied from the air separation device to the adsorption tower 2 through the switching valve 4B, and after regenerating the adsorption tower 2, is released to the atmosphere through the switching valve 4B.
吸Ｍ塔１．２の吸着工程と再生工程の切替は、切替制御
袋！１７からの信号により、切替弁３Ａ。Switching between the adsorption process and the regeneration process of M absorption tower 1.2 is done using a switching control bag! The switching valve 3A is activated by the signal from 17.
４Ａ、３Ｂ、４Ｂおよび加圧用切替弁５を開閉して行わ
れる。この２塔切替運転の弁開閉状態を第２図に示す。This is done by opening and closing 4A, 3B, 4B and the pressurizing switching valve 5. Figure 2 shows the valve opening and closing states of this two-tower switching operation.
第２図で切替弁のうち、再生ガスの流れる切替弁４Ａお
よび４Ｂがすべて閉じている間は、再生ガスは再生ガス
圧力調節弁６より放出されるため、圧力調節弁６の開度
は、切替弁４Ａ又は４Ｂの全開信号と同時に一定開度増
加する必要がある。この吸着塔切替信号をフィードフォ
ワード信号として再生ガス圧力調節計の出力信号に加え
ている。In FIG. 2, while all of the switching valves 4A and 4B through which the regeneration gas flows are closed, the regeneration gas is released from the regeneration gas pressure control valve 6, so the opening degree of the pressure control valve 6 is as follows. It is necessary to increase the opening by a certain amount simultaneously with the full open signal of the switching valve 4A or 4B. This adsorption tower switching signal is added as a feedforward signal to the output signal of the regeneration gas pressure regulator.
また、再生工程が開始されると、切替弁４Ａ又は４Ｂが
全開となる信号をフィードフォワード信号として圧力調
節計の出力信号として加える。Furthermore, when the regeneration process is started, a signal indicating that the switching valve 4A or 4B is fully open is added as a feedforward signal as an output signal of the pressure regulator.
本実施例によれば、２塔切替で使用される吸着塔の再生
ガス圧力をフィードフォワード制御により、圧力変化が
生じる前に圧力調節弁の開度を予想される開度に変更さ
せるため、圧力変動を小さくすることができる。According to this embodiment, the regeneration gas pressure of the adsorption tower used in two-column switching is controlled by feedforward to change the opening degree of the pressure regulating valve to the expected opening degree before a pressure change occurs. Fluctuations can be reduced.
本発明によれば、２塔切替で使用される吸着塔再生ガス
圧力の変動を小さくすることができる。According to the present invention, it is possible to reduce fluctuations in the adsorption tower regeneration gas pressure used in switching between two towers.
第１図は本発明の一例を示す空気分離装置用前処理＊１
の制御方法の系統臼、第２図は吸着塔の切替要領を示す
タイムチャートである。
１．２・・・・・・吸着塔、３Ａ、３Ｂ、４Ａ、４Ｂ・
・・切替弁、５・・・・・・加圧用切替弁、６・・・・
・・再生ガス圧４１口
６−−−Ｍ玖励訓呻Figure 1 shows an example of the present invention for air separation equipment pretreatment*1
Fig. 2 is a time chart showing the switching procedure of the adsorption tower. 1.2...Adsorption tower, 3A, 3B, 4A, 4B・
...Switching valve, 5... Pressurization switching valve, 6...
・・Regeneration gas pressure 41 ports 6---M
Claims (1)
口配管に設けた再生ガス圧力調節弁を圧力調節装置によ
り制御する空気分離装置用前処理装置の制御方法におい
て、吸着塔の再生工程終了時には前記再生ガス圧力調節
弁が開方向となるフィードフォワード信号を加えて該弁
への出力信号とし、吸着塔の再生工程開始時には前記再
生ガス圧力調節弁が閉方向となるフィードフォワード信
号を加えて該弁への出力信号とすることを特徴とする空
気分離装置用前処理装置の制御方法。In a control method for a pretreatment device for an air separation device, which uses a one- and two-column switching type adsorption tower and controls a regeneration gas pressure adjustment valve provided in the regeneration gas inlet pipe of each adsorption tower by a pressure adjustment device, the adsorption tower At the end of the regeneration process, a feedforward signal is added that causes the regeneration gas pressure control valve to open, and is output to the valve, and at the start of the adsorption tower regeneration process, a feedforward signal that causes the regeneration gas pressure control valve to close. 1. A method for controlling a pretreatment device for an air separation device, characterized in that the signal is added as an output signal to the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62060991A JPS63229119A (en) | 1987-03-18 | 1987-03-18 | Control method for preprocessor of air separation plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62060991A JPS63229119A (en) | 1987-03-18 | 1987-03-18 | Control method for preprocessor of air separation plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63229119A true JPS63229119A (en) | 1988-09-26 |
Family
ID=13158410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62060991A Pending JPS63229119A (en) | 1987-03-18 | 1987-03-18 | Control method for preprocessor of air separation plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63229119A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258302A (en) * | 2005-03-15 | 2006-09-28 | Taiyo Nippon Sanso Corp | Purification method for raw material air in air liquefaction separation device |
-
1987
- 1987-03-18 JP JP62060991A patent/JPS63229119A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006258302A (en) * | 2005-03-15 | 2006-09-28 | Taiyo Nippon Sanso Corp | Purification method for raw material air in air liquefaction separation device |
| JP4590287B2 (en) * | 2005-03-15 | 2010-12-01 | 大陽日酸株式会社 | Purification method of raw material air in air liquefaction separation device |
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