JPH04371209A - Regeneration method for pressure difference regeneration type adsorption tower - Google Patents
Regeneration method for pressure difference regeneration type adsorption towerInfo
- Publication number
- JPH04371209A JPH04371209A JP3147098A JP14709891A JPH04371209A JP H04371209 A JPH04371209 A JP H04371209A JP 3147098 A JP3147098 A JP 3147098A JP 14709891 A JP14709891 A JP 14709891A JP H04371209 A JPH04371209 A JP H04371209A
- Authority
- JP
- Japan
- Prior art keywords
- regeneration
- adsorption tower
- gas
- preregeneration
- waste gas
- 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
- 238000011069 regeneration method Methods 0.000 title claims abstract description 58
- 230000008929 regeneration Effects 0.000 title claims abstract description 50
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims description 8
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 22
- 239000002912 waste gas Substances 0.000 abstract description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003463 adsorbent Substances 0.000 abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 6
- 239000001569 carbon dioxide Substances 0.000 abstract description 6
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Separation Of Gases By Adsorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、鉄鋼，化学及び半導体
関連工場などに酸素や窒素などを供給する空気分離装置
の原料空気前処理装置に好適な圧力差再生方式吸着塔の
再生法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating a pressure difference regeneration type adsorption tower suitable for a raw air pretreatment device of an air separation device that supplies oxygen, nitrogen, etc. to steel, chemical, and semiconductor related factories.
【０００２】0002
【従来の技術】空気分離装置においては、極低温まで冷
却して空気中の酸素，窒素，アルゴン等を精留分離する
ため、低温で固化する水分と二酸化炭素を除去する必要
がある。この空気前処理方法として従来は可逆熱交換器
を用いる方式が主流であったが、近年では可逆熱交換器
の寿命の問題並びに、温度管理が困難なことや起動当初
においては清浄な空気が得られない等の問題から、吸着
剤を充填した吸着塔によって水分と二酸化炭素を吸着除
去する方式に切り替えられている。この吸着塔を用いた
空気前処理装置においても、その吸着剤再生方式により
温度差再生方式と圧力差再生方式とに大分されている。2. Description of the Related Art In an air separation apparatus, since oxygen, nitrogen, argon, etc. in the air are separated by rectification by cooling the air to an extremely low temperature, it is necessary to remove moisture and carbon dioxide that solidify at low temperatures. Traditionally, the mainstream method for this air pretreatment has been to use a reversible heat exchanger, but in recent years there have been problems with the lifespan of the reversible heat exchanger, difficulties in temperature control, and the difficulty of obtaining clean air at the beginning of startup. Due to problems such as the inability to remove water and carbon dioxide, the system has been switched to a method in which moisture and carbon dioxide are adsorbed and removed using an adsorption tower filled with adsorbent. Air pretreatment devices using adsorption towers are also broadly divided into temperature difference regeneration methods and pressure difference regeneration methods, depending on the adsorbent regeneration method.
【０００３】空気分離装置の空気前処理装置として利用
される圧力差再生方式吸着塔については、特公昭６１−
２９７６８号公報においても論じられており、また、同
公報の実施例（第５図）において３塔切替圧力差再生方
式吸着塔システムが述べられている。Regarding the pressure difference regeneration type adsorption tower used as an air pretreatment device of an air separation device, Japanese Patent Publication No. 1986-
This is also discussed in Publication No. 29768, and a three-column switching pressure difference regeneration type adsorption tower system is described in an example (FIG. 5) of the same publication.
【０００４】この３塔切替圧力差再生方式吸着塔システ
ムにおいては、図３のタイムチャートに示すように、各
塔がそれぞれ、吸着−脱圧−再生−加圧の工程を繰り返
すよう切替制御されており、また、いずれかの塔が必ず
吸着工程の状態で、他の２塔はその間に脱圧，再生，加
圧工程を順次行い、一定時間内に切り替えるよう制御さ
れていた。[0004] In this three-column switching pressure differential regeneration adsorption column system, each column is switched and controlled to repeat the steps of adsorption, depressurization, regeneration, and pressurization, as shown in the time chart of FIG. In addition, one of the columns was always in the adsorption step, while the other two columns performed depressurization, regeneration, and pressurization steps in sequence, and were controlled to be switched within a certain period of time.
【０００５】[0005]
【発明が解決しようとする課題】上記従来技術において
は、吸着剤再生工程時間はその吸着工程時間とほぼ同じ
となるよう制御されており、また、吸着時と再生時の圧
力の差を利用して再生を行う圧力差再生方式においては
、加熱した再生ガスによって再生を行う温度差再生方式
に較べると、単位吸着剤当りの吸着能力に限度があり、
吸着塔及び空気前処理装置自体が大きくなるという問題
があった。また、吸着剤再生ガス量を増加させることに
よって再生条件の向上を図り、吸着前の吸着能力を高め
ることはできるが、再生ガス流量を増加させることによ
って再生ガス（廃ガス）元圧が上昇するため、空気分離
装置本体の性能に影響を及ぼすことから限界があり、吸
着剤の再生に使用する再生ガス量以上の廃ガスは、大気
に放出（廃棄）させていた。[Problems to be Solved by the Invention] In the above prior art, the adsorbent regeneration process time is controlled to be almost the same as the adsorption process time, and the difference in pressure during adsorption and regeneration is used. In the pressure difference regeneration method, which performs regeneration using heated regeneration gas, the adsorption capacity per unit adsorbent is limited compared to the temperature difference regeneration method, which performs regeneration using heated regeneration gas.
There was a problem that the adsorption tower and air pretreatment device themselves became large. In addition, by increasing the amount of adsorbent regeneration gas, it is possible to improve the regeneration conditions and increase the adsorption capacity before adsorption, but by increasing the regeneration gas flow rate, the source pressure of the regeneration gas (waste gas) increases. Therefore, there is a limit as it affects the performance of the air separation device itself, and waste gas exceeding the amount of regenerated gas used for regenerating the adsorbent is released (wasted) into the atmosphere.
【０００６】本発明の目的は、従来の吸着塔再生条件を
より向上させて単位吸着剤当りの吸着能力を高め、これ
により吸着剤使用量の低減及び吸着塔の小型化を図るも
のである。An object of the present invention is to further improve the conventional adsorption tower regeneration conditions to increase the adsorption capacity per unit adsorbent, thereby reducing the amount of adsorbent used and downsizing the adsorption tower.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
、切替工程における再生工程の前に、従来は大気に放出
していた余剰廃ガスを用いた予再生工程を組み込む切替
制御方式とすることによって、従来の再生条件をより向
上させたものである。[Means for solving the problem] In order to achieve the above object, a switching control method is adopted that incorporates a pre-regeneration process using surplus waste gas that was conventionally released into the atmosphere before the regeneration process in the switching process. This improves the conventional playback conditions.
【０００８】[0008]
【作用】吸着塔切替工程における加圧，脱圧時間を極力
短くすることにより、予再生時間を確保する。そして、
予再生中は、余剰廃ガスを放出する放出弁は全閉となり
、廃ガスの全ては再生ガス及び予再生ガスとして使用さ
れる。[Operation] Pre-regeneration time is ensured by minimizing the pressurization and depressurization time in the adsorption tower switching step. and,
During pre-regeneration, the release valve that releases excess waste gas is fully closed, and all of the waste gas is used as regeneration gas and pre-regeneration gas.
【０００９】[0009]
【実施例】以下、本発明の一実施例を、図１，図２によ
って説明する。Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
【００１０】図１は３塔切替圧力差再生方式吸着システ
ムの概略フローを示す。このフロー自体は本発明におい
ても従来と同様である。FIG. 1 shows a schematic flowchart of a three-column switching pressure difference regeneration type adsorption system. This flow itself is the same in the present invention as in the prior art.
【００１１】図１において、原料空気圧縮機１によって
所定の圧力まで昇圧された原料空気は、常温（約４０℃
）で空気前処理装置に導かれ、入口弁１１を経て吸着塔
２に挿入される。吸着塔２内で水分と二酸化炭素を吸着
除去された原料空気は、出口弁１４を通り空気分離装置
の分離器本体に挿入される。In FIG. 1, raw air compressed to a predetermined pressure by a raw air compressor 1 is kept at room temperature (approximately 40°C
) is led to the air pretreatment device and inserted into the adsorption tower 2 via the inlet valve 11. The raw air from which moisture and carbon dioxide have been adsorbed and removed in the adsorption tower 2 passes through the outlet valve 14 and is inserted into the separator body of the air separation device.
【００１２】一方、吸着塔４は再生工程中になっている
。分離器本体において原料空気は精留分離され、製品と
して取り出される以外のガスは廃ガスとして配管４１よ
り取り出される。この廃ガスの大半は、吸着塔再生ガス
として再生ガス入口弁１９を通して吸着塔４に送入され
、水分と二酸化炭素の吸着を行った後、再生ガス出口弁
２２を経て大気に排出される。尚、この吸着塔４の再生
に必要な再生ガス量以外の廃ガスは、放出弁２９より配
管４２を経て大気に放出され、再生ガス（廃ガス）圧力
を一定に保っている。On the other hand, the adsorption tower 4 is in the process of regeneration. The raw air is subjected to rectification separation in the separator body, and gases other than those to be taken out as products are taken out from the pipe 41 as waste gas. Most of this waste gas is fed into the adsorption tower 4 as adsorption tower regeneration gas through the regeneration gas inlet valve 19, and after adsorbing moisture and carbon dioxide, is discharged to the atmosphere through the regeneration gas outlet valve 22. Incidentally, the waste gas other than the amount of regeneration gas necessary for regenerating the adsorption tower 4 is released to the atmosphere from the release valve 29 through the pipe 42, and the pressure of the regeneration gas (waste gas) is kept constant.
【００１３】更に、この状態において吸着塔３は、次回
吸着工程に備えて加圧弁２４より正常な空気が供給され
加圧工程が進行中である。Further, in this state, the adsorption tower 3 is supplied with normal air from the pressurizing valve 24 in preparation for the next adsorption step, and the pressurizing step is in progress.
【００１４】次に、図２によって本発明による切替制御
方法を述べる。従来の３塔切替圧力差再生方式吸着塔シ
ステムにおいては、図３で示すように、各塔がそれぞれ
吸着−脱圧−再生−加圧の工程を繰り返すよう切替制御
されており、本発明では上記再生工程の前に予再生を行
うことにある。ここで言う予再生とは、脱圧，加圧時間
を短縮することで得られた時間だけ、脱圧，加圧状態の
ときに大気中に排出されていた余剰ガス（廃ガス）を流
すことで余分に再生することを指すものである。Next, the switching control method according to the present invention will be described with reference to FIG. In the conventional three-column switching pressure difference regeneration adsorption tower system, as shown in FIG. 3, each column is switched and controlled to repeat the steps of adsorption, depressurization, regeneration, and pressurization. The purpose is to perform pre-regeneration before the regeneration process. Pre-regeneration referred to here refers to the flow of surplus gas (waste gas) that was discharged into the atmosphere during depressurization and pressurization for the time obtained by shortening the depressurization and pressurization time. This refers to extra regeneration.
【００１５】[0015]
【発明の効果】本発明により、吸着塔再生条件の向上が
図れ、必要吸着剤量の低減及び吸着塔の小型化ができる
。According to the present invention, it is possible to improve the regeneration conditions of the adsorption tower, reduce the required amount of adsorbent, and downsize the adsorption tower.
【図１】本発明が適用される空気分離装置のフロー図で
ある。FIG. 1 is a flow diagram of an air separation device to which the present invention is applied.
【図２】本発明方法の実施例のタイムチャートである。FIG. 2 is a time chart of an embodiment of the method of the present invention.
【図３】従来方法のタイムチャートである。FIG. 3 is a time chart of a conventional method.
１…原料空気圧縮機、２〜４…吸着塔、５…保冷槽、１
１〜１３…吸着塔入口弁、１４〜１６…吸着塔出口弁、
１７〜１９…再生ガス入口弁、２０〜２２…再生ガス出
口弁、２３〜２５…加圧弁、２６〜２８…脱圧弁、２９
…放出弁、４１，４２…配管、５１…流量計。1... Raw material air compressor, 2-4... Adsorption tower, 5... Cold storage tank, 1
1-13... Adsorption tower inlet valve, 14-16... Adsorption tower outlet valve,
17-19... Regeneration gas inlet valve, 20-22... Regeneration gas outlet valve, 23-25... Pressurization valve, 26-28... Depressurization valve, 29
...Discharge valve, 41, 42...Piping, 51...Flowmeter.
Claims (1)
塔切替式で使用される圧力差再生方式吸着塔において、
再生工程に入る前に、予再生工程を加えるようにしたこ
とを特徴とする圧力差再生方式吸着塔の再生法。Claim 1: In a pressure difference regeneration type adsorption tower used in a multi-column switching type for pre-treatment of raw air in an air separation device,
A method for regenerating a pressure difference regeneration type adsorption tower, characterized in that a pre-regeneration step is added before entering the regeneration step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3147098A JPH04371209A (en) | 1991-06-19 | 1991-06-19 | Regeneration method for pressure difference regeneration type adsorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3147098A JPH04371209A (en) | 1991-06-19 | 1991-06-19 | Regeneration method for pressure difference regeneration type adsorption tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04371209A true JPH04371209A (en) | 1992-12-24 |
Family
ID=15422449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3147098A Pending JPH04371209A (en) | 1991-06-19 | 1991-06-19 | Regeneration method for pressure difference regeneration type adsorption tower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04371209A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0740956A3 (en) * | 1995-05-04 | 1997-01-02 | Graeff Roderich Wilhelm | Process and apparatus for treatment of an adsorbent containing an agent, particularly moisture |
| KR100292555B1 (en) * | 1999-01-21 | 2001-06-01 | 손재익 | Pressure swing adsorption process for hydrogen purification with high productivity |
| US8454133B2 (en) | 2011-03-18 | 2013-06-04 | Ricoh Company, Ltd. | Inkjet head, inkjet recording apparatus, liquid droplet ejecting apparatus, and image forming apparatus |
| US8602530B2 (en) | 2011-02-22 | 2013-12-10 | Ricoh Company, Ltd. | Ink-jet head and ink-jet recording apparatus |
| US8777382B2 (en) | 2011-02-10 | 2014-07-15 | Ricoh Company, Ltd. | Inkjet head and image forming device |
| US8919926B2 (en) | 2011-03-07 | 2014-12-30 | Ricoh Company, Ltd. | Inkjet head and inkjet plotter |
-
1991
- 1991-06-19 JP JP3147098A patent/JPH04371209A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0740956A3 (en) * | 1995-05-04 | 1997-01-02 | Graeff Roderich Wilhelm | Process and apparatus for treatment of an adsorbent containing an agent, particularly moisture |
| US5659974A (en) * | 1995-05-04 | 1997-08-26 | Graeff; Roderich Wilhelm | Method for regeneration of an adsorbent material containing moisture and apparatus therefor |
| KR100292555B1 (en) * | 1999-01-21 | 2001-06-01 | 손재익 | Pressure swing adsorption process for hydrogen purification with high productivity |
| US8777382B2 (en) | 2011-02-10 | 2014-07-15 | Ricoh Company, Ltd. | Inkjet head and image forming device |
| US8602530B2 (en) | 2011-02-22 | 2013-12-10 | Ricoh Company, Ltd. | Ink-jet head and ink-jet recording apparatus |
| US8919926B2 (en) | 2011-03-07 | 2014-12-30 | Ricoh Company, Ltd. | Inkjet head and inkjet plotter |
| US8454133B2 (en) | 2011-03-18 | 2013-06-04 | Ricoh Company, Ltd. | Inkjet head, inkjet recording apparatus, liquid droplet ejecting apparatus, and image forming apparatus |
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