JPH01189319A - Method for regenerating psa type adsorption tower - Google Patents
Method for regenerating psa type adsorption towerInfo
- Publication number
- JPH01189319A JPH01189319A JP63012537A JP1253788A JPH01189319A JP H01189319 A JPH01189319 A JP H01189319A JP 63012537 A JP63012537 A JP 63012537A JP 1253788 A JP1253788 A JP 1253788A JP H01189319 A JPH01189319 A JP H01189319A
- Authority
- JP
- Japan
- Prior art keywords
- regeneration
- air
- valve
- adsorption tower
- regenerating
- 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
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 39
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 32
- 230000008929 regeneration Effects 0.000 claims abstract description 50
- 238000011069 regeneration method Methods 0.000 claims abstract description 50
- 238000000926 separation method Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 208000015994 miscarriage Diseases 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 208000000995 spontaneous abortion Diseases 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は［’ＳＡ式吸着塔に係り、特に２塔切替式のＰ
８Ａ式吸着塔の加圧、再生方法に好適なＰａＡ式吸着塔
の再生方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to ['SA type adsorption tower], and particularly relates to a two-column switching type P
The present invention relates to a method for pressurizing and regenerating a PaA adsorption tower, which is suitable for pressurizing and regenerating an 8A adsorption tower.
一般に、空気分離装置の空気前処理装置として用いられ
るＰＳＡ式吸着塔の再生ガスとして、通常運転中におい
ては空気分離装置から排出される不純窒素あるいは、酸
素弁に富んだ廃空気を使用する。しかし、ＰＳ人式吸１
１４の初期単独再生運転時あるいは、空気分離装置の起
動時等は、空気分離装置より再生ガスを得ることができ
ない過程がある。従りて、従来の装置は第２因に示すよ
うに、吸着基出口精製空気母管ｎより、吸着塔再生ガス
ライン母管２に≦バイパスさせるライフルおよび再生バ
イパス弁１９を設け、再生時はぼ大気圧力で運転されて
いた吸着基４．４′を、再生完了後運転圧力まで昇圧す
るためのバイパスライン５と加圧弁乙とを吸宥梧出ロラ
インに設け、訂述の再生バイパス弁１９および加圧弁２
１をおのおのの行程において操作する運転制御方式とな
っていた。Generally, impure nitrogen discharged from the air separation device during normal operation or waste air enriched with oxygen valves is used as regeneration gas for a PSA adsorption tower used as an air pre-treatment device for the air separation device. However, PS human style suction 1
There is a process in which regeneration gas cannot be obtained from the air separation device during the initial independent regeneration operation in step 14 or when the air separation device is started. Therefore, as shown in the second factor, the conventional device is equipped with a rifle and a regeneration bypass valve 19 to bypass the adsorption tower regeneration gas line main pipe 2 from the adsorption group outlet purified air main pipe n, and during regeneration, A bypass line 5 and a pressurizing valve B are installed in the suction and extraction line to raise the pressure of the adsorption base 4.4', which has been operated at almost atmospheric pressure, to the operating pressure after completion of regeneration, and the regeneration bypass valve 19 described in the following is installed. and pressurizing valve 2
1 was operated during each stroke.
なお、この種の装置として関連す゛る・ものには、例え
ば特開昭５５−９５０７９号が挙げられる。Note that related devices of this type include, for example, Japanese Patent Application Laid-Open No. 55-95079.
上記従来技術は２塔切替式のＰＳＡ式吸着塔の切替制御
行程において、吸着塔の加圧行程と再生行程とが重複す
ることが無いという点に配慮がされておらず、例えば、
再生バイパス弁をより安価な手動弁とした場合、当然弁
關閉のために自動運転性が損われ、吸着塔再生工程以外
（脱圧、加圧工程）の時は精製空気を大気へ放出すると
いう課題があり、また、再生バイパス弁を自動制御弁と
すれば自動運転とすることは容易であるが、自動弁およ
びその制御計器のコストアップが生じるという課題があ
った。The above-mentioned conventional technology does not take into consideration the fact that the adsorption tower pressurization process and regeneration process do not overlap in the switching control process of the two-column switching type PSA type adsorption tower, and for example,
If the regeneration bypass valve is a cheaper manual valve, automatic operation will naturally be impaired due to the valve being closed, and purified air will be released into the atmosphere during processes other than the adsorption tower regeneration process (depressurization and pressurization processes). Furthermore, although it would be easy to achieve automatic operation if the regeneration bypass valve was an automatic control valve, there was a problem in that the cost of the automatic valve and its control instrument would increase.
本発明の目的は上記の再生バイパス弁を廃止することに
より、安価で制御が簡略化できるＰａＡ式吸着塔の再生
方法を提供することにある。An object of the present invention is to provide a method for regenerating a PaA adsorption tower that is inexpensive and can be easily controlled by eliminating the regeneration bypass valve described above.
上記目的は、吸着塔間に吸着塔の昇圧を目的として設け
られているバイパスラインと加圧弁とに、再生行程時に
精製空気を再生用としてバイパスさせる機能を兼用させ
ることにより、達成させることができる。The above objective can be achieved by making the bypass line and pressurizing valve, which are provided between the adsorption towers for the purpose of raising the pressure of the adsorption tower, also have the function of bypassing purified air for regeneration during the regeneration process. .
吸着塔間のバイパスラインおよび加圧弁は、吸着塔再生
１穆においては精製空気を再生用として供給し、再生終
了後の加圧工程においては精製空気を加圧用として供給
するもので、再生時は再生ガス（精製空気）圧力を一定
に保つ圧力調節弁として制御させ、再生行程終了後の加
圧時は再生ガス圧力調節計からの信号をカットし、加圧
ガス（精製空気）の流産調整を行うので、空気分離装置
からの戻りガスが供給されない場合でも吸着塔の単独再
生機能が維持できる。Bypass lines and pressurizing valves between adsorption towers supply purified air for regeneration during adsorption tower regeneration 1, and supply purified air for pressurization during the pressurization process after completion of regeneration. It is controlled as a pressure regulating valve that keeps the regeneration gas (purified air) pressure constant, and when pressurizing after the regeneration process is completed, the signal from the regeneration gas pressure controller is cut off to adjust the miscarriage of the pressurized gas (purified air). Therefore, the independent regeneration function of the adsorption tower can be maintained even when the return gas from the air separation device is not supplied.
以下、本発明の一実施例を第１図により説明する。 An embodiment of the present invention will be described below with reference to FIG.
図において、原料空気は空気ｒ過器１で除塵され、空気
圧縮機２で所定の圧力に昇圧された後アフタークーラ３
で常温に冷却されてＰＥＡ式吸着装置ユニットに導かれ
る。ＰａＡ式吸着装置ユニットにおいては、２基設置さ
れた吸着塔４，４′を交互に切替えて使用し、１基使用
中に他の１基の再生、加圧を行うもので、再生、加圧操
作としては吸着塔４，４′の脱圧行程、再生行程、運転
圧力まで昇圧させる加圧行程が含まれる。ＰＳＡ式吸着
装置ユニットに導かれた空気は、切替弁１１を経て吸着
％４を通り、水分および二酸化炭素を吸着除去された精
製空気となりで切替弁νを通り空気分離装置に供給され
る。In the figure, raw air is removed with dust in an air filter 1, and after being pressurized to a predetermined pressure in an air compressor 2, an aftercooler 3
It is cooled to room temperature and guided to a PEA adsorption unit. In the PaA adsorption unit, two adsorption towers 4 and 4' are used alternately, and while one is in use, the other is regenerated and pressurized. The operations include a depressurization process of the adsorption towers 4, 4', a regeneration process, and a pressurization process to increase the pressure to the operating pressure. The air led to the PSA adsorption device unit passes through the switching valve 11, passes through the adsorption unit 4, becomes purified air from which moisture and carbon dioxide have been adsorbed, and is supplied to the air separation device through the switching valve ν.
通常運転状態においては、吸着塔４の再生ガスは空気分
離装置からの戻りガス（排出ガス）を使用しており、こ
の再生ガスは切替弁１３を経て吸着塔４′に入り吸着剤
に吸着された水分および二酸化炭素を脱着（再生）させ
た後、切替弁１４を経て大気に放出される。In normal operating conditions, the regeneration gas in the adsorption tower 4 is the return gas (exhaust gas) from the air separation device, and this regeneration gas enters the adsorption tower 4' via the switching valve 13 and is adsorbed by the adsorbent. After desorbing (regenerating) the moisture and carbon dioxide, they are released into the atmosphere via the switching valve 14.
吸着塔４′の再生行程が終了すると、吸着塔４′を運転
圧力まで昇圧する加圧工程に移行する。この加圧ガスに
は精製空気が使用され、吸着塔４出口に設けられたバイ
パスライン５および加圧弁４を通して供給される。なお
、この加圧行程（吸Ｓ塔脱圧行程も同じ）においては、
切替弁１３および１７は全閉となり、再生ガスは流れな
い状態となるため、空気分離装置からの戻りガス（排出
ガス）は−時的に放出弁（９）を介して大気へ放出され
、同ラインの圧力は一定に保たれる。When the regeneration process of the adsorption tower 4' is completed, the process moves to a pressurization process of increasing the pressure of the adsorption tower 4' to the operating pressure. Purified air is used as this pressurized gas, and is supplied through a bypass line 5 and a pressurizing valve 4 provided at the outlet of the adsorption tower 4. In addition, in this pressurization process (same as the suction tower depressurization process),
Since the switching valves 13 and 17 are fully closed and the regeneration gas does not flow, the return gas (exhaust gas) from the air separation device is temporarily discharged to the atmosphere via the discharge valve (9), and the same The pressure in the line remains constant.
しかしながら、ＰＳＡ式吸着装置ユニットは上述の通常
運転状態だけではなく１例えば、空気分離装置の起動操
作中あるいは加温操作中、さらにＰＳＡ式吸着装置ユニ
ットの初期再生時等、単独で運転されることがあり、こ
の場合は空気分離装置からの戻りガスが供給されない。However, the PSA adsorption unit is operated not only in the above-mentioned normal operating conditions, but also independently, for example, during start-up or heating operations of the air separation equipment, and during initial regeneration of the PSA adsorption unit. In this case, the return gas from the air separation device is not supplied.
本実施例は、この再生ガスを自給する方法を提供するも
ので、従来加圧行程のみに使用していた加圧弁乙に、従
来の再生ガスバイパス弁１９の機能を兼用させ、吸着塔
４，４′の再生行程においては精製空気を再生用として
供給し、再生終了後の加圧工程においては精製空気を加
圧用として供給するものである。このため、従来加圧弁
として使用してきたパイパスライン６の加圧弁乙の制御
方法として、再生時は再生ガス圧力（精製空気圧力）を
一定に保つ圧力調節弁として制御させ、再生行程終了後
の加圧工程においては、再生ガス圧力調節計からの信号
をカットし、予め設定した加圧ガス（精製空気）の流量
調整により制御する。（図示は省略）また、・このパイ
パスライン５の加圧弁４の制御方法としては、単に再生
時と加圧時の２段階の弁開度をハード的に規定させる方
法や、再生時の加圧弁乙の制御を再生ガス放出弁□□□
の弁開度により行う方法等によることもでき、さらに、
コンピュータ制御方式との併用により、より効果的かつ
最適なバイパスライン５の加圧弁乙の開度調節が可能で
ある。This embodiment provides a method for self-supplying this regeneration gas, and the pressurization valve B, which was conventionally used only for the pressurization process, is made to also function as the conventional regeneration gas bypass valve 19, and the adsorption tower 4, In the regeneration step 4', purified air is supplied for regeneration, and in the pressurization step after completion of regeneration, purified air is supplied for pressurization. For this reason, as a control method for the pressurizing valve B of the pipeline 6, which has conventionally been used as a pressurizing valve, it is controlled as a pressure regulating valve that keeps the regenerating gas pressure (purified air pressure) constant during regeneration, and the pressurizing valve B is In the pressure step, the signal from the regeneration gas pressure controller is cut off, and control is performed by adjusting the flow rate of pressurized gas (purified air) set in advance. (Illustrations are omitted) In addition, as methods for controlling the pressurizing valve 4 of this pipeline 5, there are two methods of simply prescribing the valve opening degrees in hardware, one for regeneration and one for pressurization, and a method for controlling the pressurizing valve for regeneration. Regenerate the control of the gas release valve □□□
It is also possible to use a method based on the valve opening degree, and further,
By using the computer control method in combination, it is possible to more effectively and optimally adjust the opening degree of the pressurizing valve B of the bypass line 5.
本実施例によれば、単独再生時の再生ガスはバイパスラ
イン５の加圧弁ムより得ることができ。According to this embodiment, the regeneration gas during independent regeneration can be obtained from the pressurizing valve of the bypass line 5.
従来の再生バイパス弁四および同パイパスライン冴とを
廃止できるという効果がある。This has the effect of eliminating the conventional regeneration bypass valve and bypass line.
本発明によれば、吸薯塔の単独再生機能を維持し、従来
の再生バイパス弁および同ラインを廃止することができ
るので、安価で制御が簡略化できるという効果がある。According to the present invention, the independent regeneration function of the sucker tower can be maintained and the conventional regeneration bypass valve and the same line can be abolished, so there is an effect that the control can be simplified at low cost.
第１図は本発明の一実施例の吸着基の系統図。
第２ＦＩ！Ｊは従来の装置の一実施例の系統図である。
１・・・・・・空気濾過器、２・・・・・・空気圧縮機
、３・・・・・・アフタークーラ、 ４．４’・・・・
・・吸着基、頷・・・・・・放出弁、４・・・・・・加
圧弁、２・・・・・・パイパスライン代理人 弁理士
ノ」１ 川 勝 男、・。
、′−１・・ ）
Ｋ・【・ □
／ｌｌ 図
〃
Ｊ’−−−アフタークーラ ２０−一−一方（シｆ
第２図
４．４’−−−一吠和番
２４−−−−バイノぐスラインFIG. 1 is a systematic diagram of adsorption groups in one embodiment of the present invention. 2nd FI! J is a system diagram of an embodiment of a conventional device. 1...Air filter, 2...Air compressor, 3...Aftercooler, 4.4'...
・・Adsorption group, Nod・・Release valve, 4・・Pressure valve, 2・・・・Pipeline agent Patent attorney
ノ 1 Katsuo Kawa,. ,'-1...) K.
Figure 2 4.4' --- Ichibo Kaban 24 --- Bainogus line
Claims (1)
塔切替式のＰＳＡ式吸着塔の再生方法において、 吸着塔間に加圧弁を用い、再生時は精製空気を再生用と
して供給し、該供給圧力を一定に保つように制御し、再
生工程終了後の加圧時は精製空気を加圧用として供給し
、該供給流量を制御することにより、再生時と加圧時と
で２段階の弁開度制御を行うことを特徴とするＰＳＡ式
吸着塔の再生方法。 ２、特許請求の範囲第１項において、２段階の弁開度制
御はコンピュータ制御を併用し、再生時は再生ガス放出
弁の弁開度により加圧弁を制御し、加圧時は再生ガス圧
力調節計からの信号をカットし、予め設定した加圧流量
で制御することを特徴とするＰＳＡ式吸着塔の再生方法
。[Claims] 1. Used as an air pretreatment device for an air separation device 2.
In the method for regenerating a PSA type adsorption tower with column switching, a pressurizing valve is used between the adsorption towers, purified air is supplied for regeneration during regeneration, the supply pressure is controlled to be kept constant, and after the regeneration process is completed, A PSA type adsorption tower characterized in that purified air is supplied for pressurization during pressurization, and by controlling the supply flow rate, two-stage valve opening control is performed during regeneration and pressurization. How to play. 2. In claim 1, the two-stage valve opening control uses computer control in combination, and during regeneration, the pressurizing valve is controlled by the valve opening of the regeneration gas release valve, and during pressurization, the regeneration gas pressure is controlled. A method for regenerating a PSA adsorption tower, characterized by cutting a signal from a controller and controlling the flow rate at a preset pressurized flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63012537A JPH01189319A (en) | 1988-01-25 | 1988-01-25 | Method for regenerating psa type adsorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63012537A JPH01189319A (en) | 1988-01-25 | 1988-01-25 | Method for regenerating psa type adsorption tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01189319A true JPH01189319A (en) | 1989-07-28 |
Family
ID=11808081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63012537A Pending JPH01189319A (en) | 1988-01-25 | 1988-01-25 | Method for regenerating psa type adsorption tower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01189319A (en) |
-
1988
- 1988-01-25 JP JP63012537A patent/JPH01189319A/en active Pending
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