JPS6161854B2 - - Google Patents
Info
- Publication number
- JPS6161854B2 JPS6161854B2 JP59080173A JP8017384A JPS6161854B2 JP S6161854 B2 JPS6161854 B2 JP S6161854B2 JP 59080173 A JP59080173 A JP 59080173A JP 8017384 A JP8017384 A JP 8017384A JP S6161854 B2 JPS6161854 B2 JP S6161854B2
- Authority
- JP
- Japan
- Prior art keywords
- adsorption tower
- adsorption
- valve
- time
- series
- 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
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Landscapes
- Separation Of Gases By Adsorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、空気分離装置の前処理装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a pretreatment device for an air separation device.
空気分離装置の前処理として温度再生方式（以
下TSAという）を使用した場合は、吸着塔の再
生を高温で行なうため予冷する時間が必要とな
り、その時間だけ吸着時間が長くなり、一般に切
換時間は約4hrという長時間を要していた。
When a temperature regeneration method (hereinafter referred to as TSA) is used as pretreatment for an air separation device, the adsorption tower is regenerated at a high temperature, so pre-cooling time is required, which lengthens the adsorption time and generally reduces the switching time. It took a long time, about 4 hours.
これに対し、圧力再生方式（以下PSAという）
の場合は、加圧減圧のみで吸着、再生を行なうの
で吸着剤の量が少なく、一般に切換時間が十数分
と短い。しかし、再生時間確保のうえで加圧減圧
の時間が１〜２分と短いため、短時間の加圧減圧
で生じる圧力変動が問題となる。 In contrast, the pressure regeneration method (hereinafter referred to as PSA)
In this case, adsorption and regeneration are performed only by pressurization and depressurization, so the amount of adsorbent is small, and the switching time is generally short, about ten minutes. However, since the time for pressurization and depressurization is as short as 1 to 2 minutes in order to ensure regeneration time, pressure fluctuations caused by short-time pressurization and depressurization pose a problem.
上記従来のPSA吸着塔の作用を第１図，第２図
により説明する。圧縮機で約６Kg／cm2に昇圧され
た原料空気は導管１、切換弁２を経て吸着塔４に
送られ、ここにおいて炭酸ガスと水分が吸着除去
された精製空気は逆止弁６、導管１０を経て深冷
分離装置に送られる。 The operation of the conventional PSA adsorption tower described above will be explained with reference to FIGS. 1 and 2. The raw air that has been pressurized to approximately 6 kg/cm 2 by the compressor is sent to the adsorption tower 4 via the conduit 1 and the switching valve 2, where the purified air from which carbon dioxide and moisture have been adsorbed and removed is passed through the check valve 6 and the conduit. 10 and sent to a cryogenic separator.
一方、吸着塔の再生は、深冷分離装置で製品ガ
スを分離した残りの不純窒素ガスを再生ガスとし
て、低圧で流すことにより行なわれる。すなわ
ち、再生ガスは導管１１、逆止弁９を経て吸着塔
５に送られ、吸着塔５を再生したのち切換弁３を
経て大気に放出される。 On the other hand, the adsorption tower is regenerated by flowing the impure nitrogen gas remaining after separating the product gas in a cryogenic separator as a regeneration gas at low pressure. That is, the regeneration gas is sent to the adsorption tower 5 through the conduit 11 and the check valve 9, and after regenerating the adsorption tower 5, is discharged to the atmosphere through the switching valve 3.
一定時間後、切換弁２，３を切換え、原料空気
を吸着塔５に送り、炭酸ガスと水分を吸着除去
し、逆止弁７、導管１０を経て深冷分離装置に送
る。一方、再生ガスは導管１１、逆止弁８を経て
吸着塔４に送られ、吸着塔の再生を行なつて切換
弁３を経て大気に放出される。以下この操作を繰
り返し、連続的に吸着塔を働かせる。 After a certain period of time, the switching valves 2 and 3 are switched, and the raw air is sent to the adsorption tower 5, where carbon dioxide and moisture are adsorbed and removed, and sent to the cryogenic separator via the check valve 7 and the conduit 10. On the other hand, the regeneration gas is sent to the adsorption tower 4 via the conduit 11 and check valve 8, regenerates the adsorption tower, and is discharged to the atmosphere via the switching valve 3. This operation is then repeated to make the adsorption tower work continuously.
PSA吸着塔４，５の操作サイクルを第２図に示
す。吸着塔４は約６Kg／cm2の加圧状態で炭酸ガス
と水分の吸着を行ない、切換前に同じく約６Kg／
cm2に加圧されている吸着塔５に切換えて吸着を行
なう。この吸着塔５の吸着中に、吸着塔４は大気
圧まで減圧され、再生ガスにより再生を行ない、
次の吸着のために約６Kg／cm2まで加圧された後、
吸着塔５と切換えられる。 The operation cycle of the PSA adsorption towers 4 and 5 is shown in FIG. Adsorption tower 4 adsorbs carbon dioxide and water under a pressurized state of approximately 6 kg/cm 2 , and before switching, the adsorption tower
Adsorption is performed by switching to the adsorption tower 5 which is pressurized to cm 2 . During adsorption in the adsorption tower 5, the adsorption tower 4 is depressurized to atmospheric pressure and regenerated with regeneration gas,
After being pressurized to about 6Kg/ cm2 for the next adsorption,
It is switched to adsorption tower 5.
前述のPSA吸着塔の再生時間は、切換時間のう
ち加圧減圧時間を除いた時間であるため、加圧減
圧は短時間で行なう必要がある。このため、短時
間で大気圧から約６Kg／cm2まで加圧を行なうの
で、原料空気はこの加圧に要する空気を除いた分
のみが精製空気として深冷分離装置に送られる。
したがつて、吸着塔加圧時の精製空気量の大巾な
減少による深冷分離装置の圧力低下が生じ、製品
ガス圧力の低下その他の問題が生じていた。 The above-mentioned regeneration time of the PSA adsorption tower is the switching time excluding the pressurization and depressurization time, so the pressurization and depressurization must be performed in a short time. For this reason, pressurization is carried out from atmospheric pressure to approximately 6 kg/cm 2 in a short period of time, and only the raw air, excluding the air required for this pressurization, is sent to the cryogenic separator as purified air.
Therefore, when the adsorption tower is pressurized, the amount of purified air is greatly reduced, resulting in a pressure drop in the cryogenic separation device, resulting in a drop in product gas pressure and other problems.
本発明は上記の点にかんがみ、圧力変動を小さ
くして空気分離装置全体の性能を向上することを
目的としたものである。
In view of the above points, the present invention aims to improve the performance of the entire air separation device by reducing pressure fluctuations.
本発明は、PSA吸着塔全体を加圧減圧すると圧
力変化が大きくなるので、これを分割して行なう
ことにより、加圧に必要な空気量を減らし、圧力
変動を小さくしたものである。
In the present invention, since pressurization and depressurization of the entire PSA adsorption tower causes a large pressure change, this is done in parts to reduce the amount of air required for pressurization and to reduce pressure fluctuations.
本発明の実施例を第３図，第４図により説明す
る。圧縮機で約６Kg／cm3に昇圧された原料空気を
導管１、切換弁２を経て、吸着塔４に送つた後、
バルブ６を経て吸着塔１０に送る。この２個の吸
着塔４，１０において、炭酸ガスと水分が吸着除
去された精製空気を逆止弁１２、導管１６を経て
深冷分離装置に送る。
An embodiment of the present invention will be explained with reference to FIGS. 3 and 4. After the raw air, which has been pressurized to approximately 6 kg/cm 3 by the compressor, is sent to the adsorption tower 4 through the conduit 1 and the switching valve 2,
It is sent to an adsorption tower 10 via a valve 6. In these two adsorption towers 4 and 10, purified air from which carbon dioxide gas and moisture have been adsorbed and removed is sent to a cryogenic separator via a check valve 12 and a conduit 16.
一方、この際再生ガスは、導管１７、逆止弁１
５を経て吸着塔１１に、さらにバルブ９を経て吸
着塔５に送られ、２個の吸着塔１１，５の再生を
行なつた後切換弁３より大気に放出される。 On the other hand, at this time, the regeneration gas flows through the conduit 17 and the check valve 1.
5 to the adsorption tower 11, and further to the adsorption tower 5 through the valve 9, and after regenerating the two adsorption towers 11 and 5, it is discharged to the atmosphere through the switching valve 3.
次の工程では、バルブ６，９を全閉、バルブ
７，８を全開とし、原料空気は吸着塔４からバル
ブ８を経て吸着塔１１に送り、炭酸ガスと水分を
吸着して逆止弁１３，導管１６を経て深冷分離装
置に送る。この際再生ガスは、導管１７、逆止弁
１４を経て吸着塔１０に、さらにバルブ７、吸着
塔５、切換弁３を経て放出される。 In the next step, the valves 6 and 9 are fully closed and the valves 7 and 8 are fully opened, and the raw air is sent from the adsorption tower 4 to the adsorption tower 11 via the valve 8, where carbon dioxide and water are adsorbed and the check valve 13 , via conduit 16 to a cryogenic separator. At this time, the regeneration gas is discharged through the conduit 17 and the check valve 14 to the adsorption tower 10, and further through the valve 7, the adsorption tower 5, and the switching valve 3.
次の工程では、バルブ６，９を全開、バルブ
７，８を全閉とし、切換弁２と切換弁３を切換え
る。原料空気は吸着塔５、バルブ９、吸着塔１１
と流れ、再生ガスは、吸着塔１０、バルブ６、吸
着塔４を流れる。 In the next step, the valves 6 and 9 are fully opened, the valves 7 and 8 are fully closed, and the switching valves 2 and 3 are switched. The raw air is supplied to the adsorption tower 5, valve 9, and adsorption tower 11.
The regeneration gas flows through the adsorption tower 10, the valve 6, and the adsorption tower 4.
さらに次の工程では、バルブ６、バルルブ９は
全閉、バルブ７，８を全開とし、原料空気は吸着
塔５、バルブ７、吸着塔１０と流れ、再生ガスは
吸着塔１１、バルブ８、吸着塔４と流れる。次の
工程では、バルブ６，９は全開、バルブ７，８を
全閉として最初の工程に戻る。 Furthermore, in the next step, valve 6 and valve 9 are fully closed, valves 7 and 8 are fully opened, the raw air flows through adsorption tower 5, valve 7, and adsorption tower 10, and the regeneration gas flows through adsorption tower 11, valve 8, and adsorption tower. It flows with Tower 4. In the next step, valves 6 and 9 are fully opened, valves 7 and 8 are fully closed, and the process returns to the first step.
上記吸着塔４，５，１０，１１の操作サイクル
を第４図に示す。 The operation cycle of the adsorption towers 4, 5, 10, and 11 is shown in FIG.
本発明によれば、吸着塔を分割して加圧減圧を
行なうことにより、個々の吸着塔の容量を減少で
きてそれに応じた空気量でよくなり、したがつ
て、深冷分離装置への精製空気量の変動を小さく
することができる。
According to the present invention, by dividing the adsorption tower and performing pressurization and depressurization, the capacity of each adsorption tower can be reduced and the amount of air corresponding to the capacity can be reduced. Fluctuations in air volume can be reduced.
第１図は従来のPSA吸着塔のフローを示す系統
図、第２図は操作サイクルを示す説明図、第３図
は本発明の前処理装置によるフローを示す系統
図、第４図はその操作サイクルを示す説明図であ
る。
１，１６，１７……導管、２，３……切換弁、
４，５，１０，１１……吸着塔、６，７，８，９
……バルブ、１２，１３，１４，１５……逆止
弁。
Fig. 1 is a system diagram showing the flow of a conventional PSA adsorption tower, Fig. 2 is an explanatory diagram showing the operation cycle, Fig. 3 is a system diagram showing the flow by the pretreatment device of the present invention, and Fig. 4 is its operation. It is an explanatory diagram showing a cycle. 1, 16, 17... conduit, 2, 3... switching valve,
4, 5, 10, 11... adsorption tower, 6, 7, 8, 9
... Valve, 12, 13, 14, 15... Check valve.
Claims (1)
圧力再生方式の吸着塔を２系列備え、該２系列の
吸着塔を交互に切換えて吸着、再生を行なわせる
空気分離装置の前処理装置において、前記各系列
の吸着塔を複数の吸着塔４，１０および５，１１
に分割し、分割した自系列の吸着塔４，１０およ
び５，１１間ならびに他系列との吸着塔４，１１
および５，１０間をそれぞれバルブ６，９および
８，７を介して接続したことを特徴とする空気分
離装置の前処理装置。1. In a pretreatment device for an air separation device, which is equipped with two series of pressure regeneration type adsorption towers that adsorb and remove carbon dioxide and moisture from feed air, and in which the two series of adsorption towers are alternately switched to perform adsorption and regeneration, Each series of adsorption towers is divided into a plurality of adsorption towers 4, 10 and 5, 11.
between adsorption towers 4, 10 and 5, 11 of the own series, and between adsorption towers 4, 11 with other series.
and 5, 10 are connected via valves 6, 9 and 8, 7, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59080173A JPS59210290A (en) | 1984-04-23 | 1984-04-23 | Air separation equipment pre-treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59080173A JPS59210290A (en) | 1984-04-23 | 1984-04-23 | Air separation equipment pre-treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59210290A JPS59210290A (en) | 1984-11-28 |
| JPS6161854B2 true JPS6161854B2 (en) | 1986-12-27 |
Family
ID=13710943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59080173A Granted JPS59210290A (en) | 1984-04-23 | 1984-04-23 | Air separation equipment pre-treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59210290A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01110454U (en) * | 1988-01-19 | 1989-07-26 | ||
| JPH0277805U (en) * | 1988-12-01 | 1990-06-14 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3252268A (en) * | 1963-04-01 | 1966-05-24 | Exxon Research Engineering Co | Gas separation by adsorption process |
-
1984
- 1984-04-23 JP JP59080173A patent/JPS59210290A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01110454U (en) * | 1988-01-19 | 1989-07-26 | ||
| JPH0277805U (en) * | 1988-12-01 | 1990-06-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59210290A (en) | 1984-11-28 |
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