JPH11267439A - Gas separation and gas separator for performing same - Google Patents
Gas separation and gas separator for performing sameInfo
- Publication number
- JPH11267439A JPH11267439A JP10096608A JP9660898A JPH11267439A JP H11267439 A JPH11267439 A JP H11267439A JP 10096608 A JP10096608 A JP 10096608A JP 9660898 A JP9660898 A JP 9660898A JP H11267439 A JPH11267439 A JP H11267439A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- adsorption
- product
- tank
- adsorption cylinder
- 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
Landscapes
- Separation Of Gases By Adsorption (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 圧力変動吸着方式（以下、
ＰＳＡ方式という）によるガス分離装置の改良に関す
る。BACKGROUND OF THE INVENTION Pressure fluctuation adsorption method
PSA method).
【０００２】[0002]
【従来の技術】 前記技術分野の主に小型の酸素濃縮装
置あるいは窒素濃縮装置において、１つの吸着筒に吸着
剤を充填し、１つの空気圧縮機の入口，出口を切替えて
使用することにより、空気圧縮機能と真空排気機能を持
たせて、該吸着筒に加圧空気を供給する吸着工程と脱着
再生工程を行い、ガスを分離生成する方法がある。特開
平４−２７９１７３，特開平５−２１２１１６，特開平
５−２２０２２４の各公報に酸素濃縮装置が開示されて
おり、特開昭６３−２４５４８０１公報に窒素濃縮装置
の例が開示されている。2. Description of the Related Art In a small-sized oxygen concentrator or a nitrogen concentrator mainly in the above technical field, one adsorbent is filled with an adsorbent and one air compressor is switched between an inlet and an outlet to be used. There is a method in which a gas is separated and generated by performing an adsorption step of supplying pressurized air to the adsorption cylinder and a desorption / regeneration step with an air compression function and a vacuum exhaust function. JP-A-4-279173, JP-A-5-212116, and JP-A-5-220224 disclose an oxygen concentrator, and JP-A-63-245801 discloses an example of a nitrogen concentrator.
【０００３】 これ等の装置の加圧されたガスを分離生
成して製品ガスとして供給する主要部品の構成は、１つ
の吸着筒と濃縮されたガスを蓄留する製品タンクという
簡単なものであるため、原料ガス（空気）からの製品ガ
スの収率が２０％前後と大変悪い値を示す。吸着筒が吸
着工程で原料ガスを吸着筒の原料口に圧送し、強吸着性
ガスを吸着除去し、弱吸着性ガスを製品ガスとして製品
口より取出す場合、吸着工程の終了時にはその吸着筒の
製品端部には多くの製品ガスが残っているが、かかる１
筒式の場合、次の脱着再生工程で全て捨てられる。複数
の吸着筒を有する装置であれば、再生工程の終了した吸
着筒との間で均圧工程を行い、その製品ガスを多く含む
ガスを、次に吸着工程に移行する吸着筒に移送する事に
より、製品ガスの収率を上げている。[0003] The configuration of the main components of these devices, which separate and generate pressurized gas and supply it as product gas, is as simple as one adsorption cylinder and a product tank for storing concentrated gas. Therefore, the yield of the product gas from the raw material gas (air) is a very bad value of about 20%. When the adsorption cylinder pumps the raw material gas to the raw material port of the adsorption cylinder in the adsorption step, adsorbs and removes the strongly adsorbable gas, and takes out the weakly adsorbable gas from the product port as the product gas. A lot of product gas remains at the end of the product.
In the case of the cylindrical type, all are discarded in the next desorption / regeneration step. In the case of an apparatus having a plurality of adsorption cylinders, a pressure equalization step is performed between the adsorption cylinder and the adsorption cylinder after the regeneration step, and the gas containing a large amount of the product gas is transferred to the adsorption cylinder which will be shifted to the next adsorption step. As a result, the yield of product gas is increased.
【０００４】 収率が悪いということは、同じ消費電力
でも取出せる製品ガスの量が少ない事であり、また同じ
製品ガスが得られる装置であれば、より大きな空気圧縮
機が必要であることとなり、より大きい消費電力を必要
とする事になる。[0004] Poor yield means that the amount of product gas that can be extracted with the same power consumption is small, and a larger air compressor is required for an apparatus that can obtain the same product gas. , Which requires more power consumption.
【０００５】[0005]
【発明が解決しようとする課題】 本発明はかかる従来
の問題点を解消することを目的とする。すなわち、１筒
式のＰＳＡ方式によるガス分離におけるガスの収率向上
を目的とする。An object of the present invention is to solve such a conventional problem. That is, the object is to improve the gas yield in gas separation by the one-tube PSA method.
【０００６】[0006]
【課題を解決するための手段】 かかる目的を達成する
ために鋭意研究を行なった結果、ひとつの空気圧縮機と
ひとつの吸着筒を有する真空再生法によるＰＳＡ方式の
ガス分離法において、ガス保留タンクを付設して該吸着
筒の吸着工程と再生工程の間に吸着筒の出口端とガス保
留タンクを接続し、吸着筒内の製品ガスが富化したガス
をガス保留タンクに一旦保留させた後、再生工程に入
り、再生工程終了後、該吸着筒の出口端と該ガス保留タ
ンクを接続し、ガス保留タンク内の該ガスを吸着筒に戻
すようにしたＰＳＡ方式のガス分離の方法や装置を提供
するものである。Means for Solving the Problems As a result of diligent research to achieve the above object, a gas holding tank is used in a PSA type gas separation method by a vacuum regeneration method having one air compressor and one adsorption cylinder. The outlet end of the adsorption cylinder is connected to the gas storage tank between the adsorption step and the regeneration step of the adsorption cylinder, and the product-enriched gas in the adsorption cylinder is temporarily stored in the gas storage tank. In the regeneration step, after the regeneration step is completed, the outlet end of the adsorption cylinder is connected to the gas storage tank, and the gas in the gas storage tank is returned to the adsorption cylinder by the PSA type gas separation method and apparatus. Is provided.
【０００７】 さらに詳しくは次のような構成にするも
のである。ひとつの空気圧縮機と、吸着剤を充填したひ
とつの吸着筒を有する真空再生法によって空気から製品
ガスを得るＰＳＡ方式のガス分離方法において、製品タ
ンクとは別にガス保留タンクを付設して該吸着筒の吸着
工程と再生工程との間に、該吸着筒の出口端と該ガス保
留タンクとを電磁弁を一定時間開にして連通し、該吸着
筒内の製品ガスが富化したガスをこのガス保留タンクに
一旦保留させた後、再生工程に入り、再生工程終了後、
該吸着筒に該ガス保留タンク内の製品ガスが富化したガ
スを該吸着筒に戻すようにしたことを特徴とするＰＳＡ
方式のガス分離方法を構成する。なお、ガス保留タンク
内の製品ガスが富化したガスを吸着筒に戻すとき、吸着
筒入口端側に並流的に戻してもよい。More specifically, the following configuration is adopted. In a PSA type gas separation method in which a product gas is obtained from air by a vacuum regeneration method having one air compressor and one adsorption cylinder filled with an adsorbent, a gas holding tank is provided separately from the product tank. Between the adsorption step of the cylinder and the regeneration step, the outlet end of the adsorption cylinder and the gas holding tank are communicated by opening an electromagnetic valve for a certain period of time, and the gas enriched in the product gas in the adsorption cylinder is discharged. After temporarily holding the gas in the gas storage tank, enter the regeneration process, and after the regeneration process,
A PSA, wherein the product-enriched gas in the gas storage tank is returned to the adsorption column.
The gas separation method of the system is constituted. When returning the product gas-enriched gas in the gas storage tank to the adsorption column, the gas may be returned to the adsorption column entrance end side in a co-current manner.
【０００８】 また本発明は次のようにも構成する。空
気圧縮機の入口と出口を継ぎ変えることにより真空排気
機能と空気圧縮機能とをあわせ持つひとつの空気圧縮機
と、吸着剤を充填したひとつの吸着筒を有する真空再生
法によって空気から製品ガスを得るＰＳＡ方式のガス分
離装置において、製品タンクとは別にガス保留タンク７
を付設して、該吸着筒に該空気圧縮機により圧縮空気を
圧送する吸着工程と、この吸着工程の終了後、該吸着筒
の出口端にガス保留タンクを電磁弁を介して配管手段で
接続し、該電磁弁を一定時間開にして該吸着筒内に残留
する製品ガスが富化したガスを、そのガスの圧力と該ガ
ス保留タンクの圧力との圧力差により該ガス保留タンク
に一旦保留させ、その後に該電磁弁を閉とし、電磁弁２
により該吸着筒の空気の入口端を該空気圧縮機の入口に
切替えて、更に電磁弁３により該空気圧縮機の出口を大
気開放にそれぞれ切替えて吸着筒内のガスを真空排気し
て、この吸着筒の再生工程に入り、この再生工程の終了
後、該吸着筒の出口端に、該ガス保留タンクとの間に付
設した電磁弁を一定時間開にして、このガス保留タンク
内のガスを吸着筒に向流的に戻した後、該電磁弁を閉と
して、次の新たな吸着工程を実施するように構成したこ
とを特徴とするＰＳＡ方式のガス分離装置を構成する。Further, the present invention is configured as follows. By switching the inlet and outlet of the air compressor, the product gas is separated from the air by a vacuum regeneration method that has one air compressor that has both a vacuum exhaust function and an air compression function and one adsorption cylinder that is filled with an adsorbent. In the obtained PSA type gas separation device, the gas holding tank 7 is provided separately from the product tank.
And an adsorption step in which compressed air is sent to the adsorption cylinder by the air compressor. After the adsorption step, a gas holding tank is connected to the outlet end of the adsorption cylinder by a pipe via an electromagnetic valve. Then, the solenoid valve is opened for a certain period of time, and the product-enriched gas remaining in the adsorption cylinder is temporarily held in the gas holding tank by a pressure difference between the pressure of the gas and the pressure of the gas holding tank. Then, the solenoid valve is closed, and the solenoid valve 2
By switching the inlet end of the air of the adsorption cylinder to the inlet of the air compressor, and further by switching the outlet of the air compressor to the atmosphere by the solenoid valve 3, the gas in the adsorption cylinder is evacuated. After the regeneration process of the adsorption cylinder is started, after the regeneration process is completed, a solenoid valve provided between the outlet end of the adsorption cylinder and the gas storage tank is opened for a certain period of time to release the gas in the gas storage tank. After returning to the adsorption cylinder countercurrently, the solenoid valve is closed, and the next new adsorption step is performed to constitute a PSA type gas separation device.
【０００９】 更に、本発明は次のようにも構成する。
空気圧縮機の入口と出口とを継ぎ変えることにより真空
排気機能と空気圧縮機能とをあわせ持つひとつの空気圧
縮機と、吸着剤を充填したひとつの吸着筒と、製品ガス
を貯留する製品タンクを有する真空再生法によって空気
から製品ガスを得るＰＳＡ方式のガス分離装置におい
て、該製品タンクとは別にガス保留タンク７を付設し
て、該吸着筒に該空気圧縮機により圧縮空気を圧送する
吸着工程と、この吸着工程で生産する製品ガスを配管手
段の途中に付設した電磁弁を一定時間開にして該製品タ
ンクに貯留し、この吸着工程の終了後に該製品タンクの
入口端の電磁弁を閉とし、次に該吸着筒の出口端に該ガ
ス保留タンクを電磁弁４を介して接続し、該電磁弁を一
定時間開にして該吸着筒内に残留する製品ガスが富化し
たガスを、そのガスの圧力と該ガス保留タンクの圧力と
の圧力差により該ガス保留タンクに一旦保留させ、その
後に該電磁弁を閉とし、電磁弁２により該吸着筒の空気
の入口端を該空気圧縮機の入口に切替え、更に電磁弁３
により該空気圧縮機の出口を大気開放にそれぞれ切替え
て吸着筒内のガスを真空排気してこの吸着筒の再生工程
に入り、この再生工程の終了後、電磁弁３を該吸着筒の
入口端に切替えて該吸着筒の出口端に配管手段で接続す
るガス保留タンクとの間に付設した電磁弁４を一定時間
開にして、このガス保留タンク内のガスを該吸着筒内に
向流的に戻した後、該電磁弁を閉とし、引続いて該製品
タンク８との間の電磁弁５を一定時間開にして該製品タ
ンクに貯留している製品ガスの一部分を前記の吸着筒６
の出口端からこの吸着筒に向流的に戻した後、次の新た
な吸着工程を実施するように構成したことを特徴とする
ＰＳＡ方式のガス分離装置を構成する。なお、この場合
もガス保留タンク内のガスを吸着筒内に戻すとき、該吸
着筒の入口端に戻して吸着筒内を並流的に流してもよ
い。Further, the present invention is configured as follows.
One air compressor that has both a vacuum evacuation function and an air compression function by changing the inlet and outlet of the air compressor, one adsorption cylinder filled with adsorbent, and a product tank that stores product gas In a PSA type gas separation apparatus for obtaining product gas from air by a vacuum regeneration method, an adsorption step in which a gas holding tank 7 is provided separately from the product tank and compressed air is pressure-fed to the adsorption cylinder by the air compressor. Then, the product gas produced in this adsorption step is stored in the product tank by opening a solenoid valve provided in the middle of the piping means for a certain period of time, and after the end of the adsorption step, the solenoid valve at the inlet end of the product tank is closed. Then, the gas holding tank is connected to the outlet end of the adsorption cylinder via the electromagnetic valve 4, and the electromagnetic valve is opened for a certain period of time to remove the product gas-enriched gas remaining in the adsorption cylinder, Of that gas The gas is temporarily stored in the gas storage tank by a pressure difference between the force and the pressure of the gas storage tank. Thereafter, the solenoid valve is closed, and the inlet end of the air in the adsorption cylinder is closed by the solenoid valve 2 to the inlet of the air compressor. And switch to solenoid valve 3
By switching the outlet of the air compressor to open to the atmosphere, the gas in the adsorption cylinder is evacuated, and the regeneration step of the adsorption cylinder is started. After the regeneration step, the solenoid valve 3 is connected to the inlet end of the adsorption cylinder. The solenoid valve 4 attached to the gas holding tank connected to the outlet end of the adsorption cylinder by a pipe means is opened for a certain period of time, and the gas in the gas holding tank flows countercurrently into the adsorption cylinder. , The solenoid valve is closed, the solenoid valve 5 between the tank and the product tank 8 is subsequently opened for a certain period of time, and a part of the product gas stored in the product tank is released from the adsorption cylinder 6.
After returning to the adsorption column countercurrently from the outlet end of the above, a PSA-type gas separation device is constituted, in which the next new adsorption step is performed. In this case as well, when returning the gas in the gas storage tank to the inside of the adsorption cylinder, the gas may be returned to the inlet end of the adsorption cylinder to flow in the adsorption cylinder in parallel.
【００１０】 なお、空気を原料ガスとしてゼオライト
を吸着剤として、酸素ガスを製品ガスとして生産するＰ
ＳＡ方式の酸素ガス分離装置、あるいは、分子篩炭（Ｍ
ＳＣ）を吸着剤として窒素ガスを製品ガスとして生産す
るＰＳＡ方式の窒素ガス分離装置があり、本発明の方式
は、この両方に適用できる。In addition, P which produces air as a raw material gas, zeolite as an adsorbent, and oxygen gas as a product gas
SA type oxygen gas separator or molecular sieve coal (M
There is a PSA type nitrogen gas separation apparatus that produces nitrogen gas as a product gas using SC) as an adsorbent, and the method of the present invention can be applied to both.
【００１１】[0011]
【実施例】 図１に本発明の１つの実施例のフローシー
トを示す。本実施例はＰＳＡ方式の酸素ガス分離装置の
例で示すものである。吸着筒６に窒素ガスを強吸着性ガ
ス，酸素ガスを弱吸着性ガスとするゼオライトを吸着剤
として充填し、空気圧縮機の入口と出口を継ぎ変えるこ
とにより、真空排気機能と空気圧縮機能とをあわせ持つ
空気圧縮機１１の入口側に三方式の電磁弁２によりその
一方の口は吸入フィルター１を介して空気を取込むよう
に、他方の口は吸着筒６の入口端に接続し、該空気圧縮
機１１の出口は同じく三方式の電磁弁３によりその一方
の口は吸着筒６の入口端に接続し、他方の口はサイレン
サー１０を介して、大気に開放されている。FIG. 1 shows a flow sheet according to one embodiment of the present invention. This embodiment is an example of a PSA type oxygen gas separation apparatus. The adsorption cylinder 6 is filled with zeolite, which uses nitrogen gas as a strongly adsorbing gas and oxygen gas as a weakly adsorbing gas, as an adsorbent, and the inlet and outlet of the air compressor are switched to provide a vacuum exhaust function and an air compression function. A three-way solenoid valve 2 is connected to the inlet side of the air compressor 11 having one side so as to take in air through the suction filter 1 and the other side is connected to the inlet end of the adsorption cylinder 6. The outlet of the air compressor 11 is connected to the inlet end of the adsorption cylinder 6 at one port by a three-way solenoid valve 3, and the other port is open to the atmosphere via a silencer 10.
【００１２】 吸着筒６の出口には電磁弁４を介してガ
ス保留タンク７が配管にて接続され、同じく電磁弁５を
並列に接続して製品タンク８に配管接続され、製品タン
ク８には減圧弁９により吐出圧を減圧調整して、製品ガ
ス取出口１２より外部に取出すよう構成した。この構成
の動作作用を説明すると、三方式の電磁弁２を吸入フィ
ルター１を介して外気を空気圧縮機１１に取込むよう切
替え、同じく三方式の電磁弁３を空気圧縮機１１の圧縮
空気を吸着筒６の方へ送り込むように切替えて、吸着筒
６へ加圧しながら空気を吹送すると、吸着筒６内に充填
されているゼオライトに空気中の窒素ガスが入口端から
暫時吸着して吸着除去されるため吸着筒他端側に弱吸着
性ガスがたまり、他端口より酸素ガスが濃縮されて出て
くるので、電磁弁５を開にして製品タンク８へ貯留す
る。この製品ガスは減圧弁９を介して減圧調整して製品
ガスを取出す。この工程を吸着工程という。A gas holding tank 7 is connected to the outlet of the adsorption cylinder 6 via a solenoid valve 4 via a pipe. Similarly, the solenoid valve 5 is connected in parallel and connected to a product tank 8 by a pipe. The discharge pressure is adjusted to be reduced by the pressure reducing valve 9 and taken out from the product gas outlet 12 to the outside. To explain the operation and operation of this configuration, the three-type solenoid valve 2 is switched to take in the outside air into the air compressor 11 via the suction filter 1, and the three-type solenoid valve 3 is also switched to the compressed air of the air compressor 11. When the air is blown while being pressurized to the adsorption column 6 by switching to be sent to the adsorption column 6, nitrogen gas in the air is temporarily adsorbed to the zeolite filled in the adsorption column 6 from the inlet end to be adsorbed and removed. Therefore, the weakly adsorbing gas accumulates at the other end of the adsorption column, and the oxygen gas is concentrated and comes out from the other end. Therefore, the electromagnetic valve 5 is opened and stored in the product tank 8. The product gas is reduced in pressure through the pressure reducing valve 9 to take out the product gas. This step is called an adsorption step.
【００１３】 吸着筒６の吸着剤が窒素ガスを吸着して
飽和する前に電磁弁５を閉とし、電磁弁４を開にして吸
着筒６の出口端部に多く残留している酸素ガスをガス保
留タンク７に吸着筒６の圧力により均圧化して一旦保留
させる。（保留工程）その間、電磁弁２は吸着筒入口と
連通する方向に切替え、空気圧縮機の出口と入口を接続
し、空転させる。Before the adsorbent of the adsorption cylinder 6 adsorbs nitrogen gas and becomes saturated, the electromagnetic valve 5 is closed, and the electromagnetic valve 4 is opened to remove oxygen gas remaining at the outlet end of the adsorption cylinder 6. The pressure in the gas storage tank 7 is equalized by the pressure of the adsorption cylinder 6 and temporarily held. (Reservation step) During that time, the solenoid valve 2 is switched to a direction communicating with the inlet of the adsorption cylinder, the outlet and the inlet of the air compressor are connected, and the idle is performed.
【００１４】 上記のように電磁弁４を開にした均圧化
が完了すると電磁弁４を閉とした後、３方式の電磁弁３
をサイレンサー１０を通して大気にガスを放出し吸着筒
６を真空排気する。真空排気することにより吸着剤（ゼ
オライト）に吸着している窒素ガス，水分等のガスが脱
着し、吸着剤の能力が再生される。これを再生工程とい
う。When the pressure equalization with the electromagnetic valve 4 opened as described above is completed, the electromagnetic valve 4 is closed, and then the three-type electromagnetic valve 3
Is released into the atmosphere through the silencer 10 and the adsorption cylinder 6 is evacuated. By evacuation, gases such as nitrogen gas and moisture adsorbed on the adsorbent (zeolite) are desorbed, and the capacity of the adsorbent is regenerated. This is called a regeneration step.
【００１５】 一定時間再生工程を実施の後、吸着筒は
約１５０トールの真空に達し、再生工程が完了する。こ
のとき３方式の電磁弁３を空気圧縮機１１の出口と吸着
筒６の入口とを連通するよう切替え電磁弁４を開にし
て、ガス保留タンク７に一旦保留させた製品ガスが富化
したガスを吸着筒６に戻した後、電磁弁４を閉にし、３
方式の電磁弁２をフィルター１から空気圧縮機１１に外
気を取込むよう切替え、外気を吸着筒６へ圧送する。こ
れと同時に電磁弁５を開にして、製品ガスの一部を吸着
筒６へ戻した後、吸着工程に入り吸着圧が高まるにつれ
て製品ガス（酸素）が濃縮されて製品タンク８に貯留さ
れる。After performing the regeneration step for a certain period of time, the adsorption column reaches a vacuum of about 150 Torr, and the regeneration step is completed. At this time, the three-system solenoid valve 3 is switched so that the outlet of the air compressor 11 communicates with the inlet of the adsorption cylinder 6, and the solenoid valve 4 is opened to enrich the product gas once held in the gas holding tank 7. After returning the gas to the adsorption cylinder 6, the solenoid valve 4 is closed and 3
The electromagnetic valve 2 of the system is switched to take in the outside air from the filter 1 to the air compressor 11, and the outside air is pressure-fed to the adsorption cylinder 6. At the same time, the solenoid valve 5 is opened and a part of the product gas is returned to the adsorption column 6. Then, the adsorption process is started, and as the adsorption pressure increases, the product gas (oxygen) is concentrated and stored in the product tank 8. .
【００１６】 かかる吸着工程，保留工程，再生工程，
戻し工程を順次繰り返して製品ガスを濃縮する。本実施
例での加圧圧力は２ｋｇｆ／ｃｍ2 Ｇ、真空排気時の真
空値は１５０トール，吸着筒は２．０Ｌ，吸着剤は約
１．３６ｋｇ，吸着工程が約１６秒，再生工程が１６
秒，取出酸素量が３．５Ｌ／分であり、従来の収率が１
８〜２０％であったものに対し、３５％と高収率に向上
した。The adsorption step, the holding step, the regeneration step,
The return process is sequentially repeated to concentrate the product gas. In this embodiment, the pressurizing pressure is 2 kgf / cm 2 G, the vacuum value at the time of evacuation is 150 Torr, the adsorption cylinder is 2.0 L, the adsorbent is about 1.36 kg, the adsorption step is about 16 seconds, and the regeneration step is 16
Seconds, the amount of oxygen taken out is 3.5 L / min, and the conventional yield is 1
The yield was improved to 35%, which was higher than that of 8 to 20%.
【００１７】 なお、吸着筒６に分子篩炭（ＭＳＣモレ
キュラー・シーブス・カーボン）を充填し、加圧圧力を
５ｋｇｆ／ｃｍ2 Ｇで吸着工程を行うと、吸着筒内の分
子篩炭に酸素ガスが吸着除去されて、窒素ガスが濃縮さ
れて、製品タンクに貯留される。動作は酸素の場合とほ
ぼ同じであるが、各工程における時間が異なるし、吸着
工程が７０秒，再生工程が１００秒，取出窒素ガス濃度
９９．９％で５．５Ｌ／分が得られた。When the adsorption cylinder 6 is filled with molecular sieve coal (MSC molecular sieves carbon) and the adsorption step is performed at a pressure of 5 kgf / cm 2 G, oxygen gas is adsorbed on the molecular sieve in the adsorption cylinder. After being removed, the nitrogen gas is concentrated and stored in the product tank. The operation is almost the same as in the case of oxygen, but the time in each step is different, and 5.5 L / min was obtained at 70 seconds for the adsorption step, 100 seconds for the regeneration step, and 99.9% nitrogen gas concentration. .
【００１８】 また、電磁弁４，５はポペット型でもダ
イヤフラム型，スライド型，スプール型でも良く、電磁
弁で駆動される外部パイロットエアーで駆動される型の
弁であっても、その導管の通路の開閉が出来れば本発明
の目的にかなうものである。３方式の電磁弁は２方式の
電磁弁の組合せによっても、その目的を果たすことが出
来るものであるから、本発明の範囲に含まれるものであ
る。また前記の保留工程及び戻し工程は１〜２秒程度で
あるが、該保留工程の前半０．５〜１秒の間、３方式の
電磁弁２を外気を取込み、３方式の電磁弁３を吸着筒６
の入口側に圧縮空気を吹送しながら、ガス保留タンク７
にガスを保留させ、より多くのガスを保留させることも
ある。これはガス保留タンク７の容積との関係があり、
該容積が小さい場合はこのようにする方が収率向上が大
きい場合がある。前記保留工程，戻し工程が行われてい
る時間は空気圧縮機１１の入口，出口をそれぞれ直接継
いで空転させ、電気エネルギーの低減運転を行う。The solenoid valves 4 and 5 may be of a poppet type, a diaphragm type, a slide type, or a spool type, and may be of a type that is driven by external pilot air driven by an electromagnetic valve. If the opening and closing can be performed, the object of the present invention is satisfied. The three-system solenoid valve can achieve its purpose even by a combination of the two-system solenoid valves, and is included in the scope of the present invention. The above-mentioned holding step and the returning step are performed for about 1 to 2 seconds. During the first half of the holding step, 0.5 to 1 second, the three-type solenoid valve 2 takes in outside air, and the three-type solenoid valve 3 is turned on. Suction cylinder 6
While blowing compressed air to the inlet side of the gas storage tank 7
In some cases, the gas may be retained and more gas may be retained. This is related to the volume of the gas storage tank 7,
When the volume is small, the improvement in the yield may be larger by this method. During the time during which the holding step and the returning step are being performed, the inlet and the outlet of the air compressor 11 are directly connected to each other to idle and perform a reduction operation of electric energy.
【００１９】[0019]
【発明の効果】 １筒式真空方式のＰＳＡ方式のガス分
離のガス収率を高めることが出来た。[Effect of the Invention] The gas yield of the gas separation of the PSA system of the single-tube vacuum system could be increased.
【図１】 本発明の好ましい実施態様のフローシートで
ある。FIG. 1 is a flow sheet of a preferred embodiment of the present invention.
１ 吸入フィルター ２，３，４，５ 電磁弁 ６ 吸着筒 ７ ガス保留タンク ８ 製品タンク １０ サイレンサー １１ 空気圧縮機 １２ 製品ガス取出口 DESCRIPTION OF SYMBOLS 1 Suction filter 2, 3, 4, 5 Solenoid valve 6 Adsorption cylinder 7 Gas holding tank 8 Product tank 10 Silencer 11 Air compressor 12 Product gas outlet
Claims (3)
たひとつの吸着筒を有する真空再生法によって空気から
製品ガスを得る圧力変動吸着方式のガス分離方法におい
て、製品タンクとは別にガス保留タンクを付設して該吸
着筒の吸着工程と再生工程との間に、該吸着筒の出口端
と該ガス保留タンクとを電磁弁を一定時間開にして連通
し、該吸着筒内の製品ガスが富化したガスをこのガス保
留タンクに一旦保留させた後、再生工程に入り、再生工
程終了後、該吸着筒に該ガス保留タンク内の製品ガスが
富化したガスを該吸着筒に戻すようにしたことを特徴と
する圧力変動吸着方式のガス分離方法。In a gas separation method of a pressure fluctuation adsorption system in which a product gas is obtained from air by a vacuum regeneration method having one air compressor and one adsorption cylinder filled with an adsorbent, gas is retained separately from a product tank. Between the adsorption step and the regeneration step of the adsorption column, an outlet end of the adsorption column and the gas holding tank are connected to each other by opening a solenoid valve for a certain period of time, and the product gas in the adsorption column is provided. The gas enriched in the gas storage tank is temporarily held in the gas storage tank, and then enters a regeneration step. After the regeneration step is completed, the product gas in the gas storage tank is returned to the adsorption cylinder to the adsorption cylinder. A pressure fluctuation adsorption type gas separation method characterized by the above.
とにより真空排気機能と空気圧縮機能とをあわせ持つひ
とつの空気圧縮機と、吸着剤を充填したひとつの吸着筒
を有する真空再生法によって空気から製品ガスを得る圧
力変動吸着方式のガス分離装置において、製品タンクと
は別にガス保留タンク（７）を付設して、該吸着筒に該
空気圧縮機により圧縮空気を圧送する吸着工程と、この
吸着工程の終了後、該吸着筒の出口端にガス保留タンク
を電磁弁を介して配管手段で接続し、該電磁弁を一定時
間開にして該吸着筒内に残留する製品ガスが富化したガ
スを、そのガスの圧力と該ガス保留タンクの圧力との圧
力差により該ガス保留タンクに一旦保留させ、その後に
該電磁弁を閉とし、電磁弁（２）により該吸着筒の空気
の入口端を該空気圧縮機の入口に切替えて、更に電磁弁
（３）により該空気圧縮機の出口を大気開放にそれぞれ
切替えて吸着筒内のガスを真空排気して、この吸着筒の
再生工程に入り、この再生工程の終了後、該吸着筒の出
口端に、該ガス保留タンクとの間に付設した電磁弁を一
定時間開にして、このガス保留タンク内のガスを吸着筒
に向流的に戻した後、該電磁弁を閉として、次の新たな
吸着工程を実施するように構成したことを特徴とする圧
力変動吸着方式のガス分離装置。2. A vacuum regeneration method having one air compressor having both a vacuum evacuation function and an air compression function by changing an inlet and an outlet of an air compressor, and one adsorption cylinder filled with an adsorbent. An adsorption step of providing a gas holding tank (7) separately from the product tank in a pressure fluctuation adsorption type gas separation apparatus that obtains product gas from air, wherein the compressed air is pressure-fed to the adsorption cylinder by the air compressor; After the end of the adsorption step, a gas holding tank is connected to the outlet end of the adsorption cylinder by a piping means via an electromagnetic valve, and the electromagnetic valve is opened for a certain time to enrich the product gas remaining in the adsorption cylinder. Is temporarily held in the gas holding tank by a pressure difference between the pressure of the gas and the pressure of the gas holding tank. Thereafter, the electromagnetic valve is closed, and the air in the adsorption cylinder is released by the electromagnetic valve (2). Air pressure at the inlet end The inlet of the compressor is switched to the inlet of the compressor, and the outlet of the air compressor is further switched to the atmosphere by the solenoid valve (3) to evacuate the gas in the adsorption cylinder. After the end of the process, a solenoid valve provided between the outlet end of the adsorption cylinder and the gas storage tank is opened for a certain period of time, and the gas in the gas storage tank is returned countercurrently to the adsorption cylinder. A pressure fluctuation adsorption type gas separation apparatus characterized in that the electromagnetic valve is closed and the next new adsorption step is performed.
ことにより真空排気機能と空気圧縮機能とをあわせ持つ
ひとつの空気圧縮機と、吸着剤を充填したひとつの吸着
筒と、製品ガスを貯留する製品タンクを有する真空再生
法によって空気から製品ガスを得る圧力変動吸着方式の
ガス分離装置において、該製品タンクとは別にガス保留
タンク（７）を付設して、該吸着筒に該空気圧縮機によ
り圧縮空気を圧送する吸着工程と、この吸着工程で生産
する製品ガスを配管手段の途中に付設した電磁弁を一定
時間開にして該製品タンクに貯留し、この吸着工程の終
了後に該製品タンクの入口端の電磁弁を閉とし、次に該
吸着筒の出口端に配管手段で接続する該ガス保留タンク
とを電磁弁（４）を介して接続し、該電磁弁を一定時間
開にして該吸着筒内に残留する製品ガスが富化したガス
を、そのガスの圧力と該ガス保留タンクの圧力との圧力
差により該ガス保留タンクに一旦保留させ、その後に該
電磁弁を閉とし、電磁弁（２）により該吸着筒の空気の
入口端を該空気圧縮機の入口に切替え、更に電磁弁
（３）により該空気圧縮機の出口を大気開放にそれぞれ
切替えて吸着筒内のガスを真空排気してこの吸着筒の再
生工程に入り、この再生工程の終了後、電磁弁（３）を
該吸着筒の入口端に切替えて該吸着筒の出口端に配管手
段で接続するガス保留タンクとの間に付設した電磁弁
（４）を一定時間開にして、このガス保留タンク内のガ
スを該吸着筒に向流的に戻した後、該電磁弁を閉とし、
引続いて該製品タンク（８）との間の電磁弁（５）を一
定時間開にして、該製品タンクに貯留している製品ガス
の一部分を前記の吸着筒（６）の出口端からこの吸着筒
に向流的に戻した後、該電磁弁（５）を閉として、次の
新たな吸着工程を実施するように構成したことを特徴と
する圧力変動吸着方式のガス分離装置。3. An air compressor having both a vacuum evacuation function and an air compression function by changing an inlet and an outlet of an air compressor, an adsorption cylinder filled with an adsorbent, and a product gas. In a pressure fluctuation adsorption type gas separator for obtaining a product gas from air by a vacuum regeneration method having a product tank to be stored, a gas holding tank (7) is provided separately from the product tank, and the air compression is applied to the adsorption cylinder. An adsorption step of pumping compressed air by a machine, and a product gas produced in this adsorption step is stored in the product tank by opening a solenoid valve provided in the middle of the piping means for a certain period of time and storing the product gas after the adsorption step. The solenoid valve at the inlet end of the tank is closed, and then the gas holding tank connected to the outlet end of the adsorption column by piping means is connected via a solenoid valve (4), and the solenoid valve is opened for a certain period of time. Inside the adsorption cylinder The gas enriched in product gas remaining in the gas storage tank is temporarily held in the gas storage tank by a pressure difference between the pressure of the gas and the pressure of the gas storage tank, and then the electromagnetic valve is closed, and the electromagnetic valve (2 ), The inlet end of the air in the adsorption cylinder is switched to the inlet of the air compressor, and the outlet of the air compressor is switched to the atmosphere by the solenoid valve (3) to evacuate the gas in the adsorption cylinder. After the regeneration step of the adsorption column, after the regeneration step is completed, the solenoid valve (3) is switched to the inlet end of the adsorption column to be connected to the outlet end of the adsorption column with a gas holding tank connected by piping means. After the attached solenoid valve (4) is opened for a certain period of time and the gas in the gas storage tank is returned countercurrently to the adsorption column, the solenoid valve is closed,
Subsequently, the solenoid valve (5) between the product tank (8) and the product tank (8) is opened for a certain period of time, and a part of the product gas stored in the product tank is removed from the outlet end of the adsorption cylinder (6). A pressure-fluctuation adsorption type gas separation apparatus, wherein the electromagnetic valve (5) is closed after returning to the adsorption cylinder in a countercurrent direction, and the next new adsorption step is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10096608A JPH11267439A (en) | 1998-03-24 | 1998-03-24 | Gas separation and gas separator for performing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10096608A JPH11267439A (en) | 1998-03-24 | 1998-03-24 | Gas separation and gas separator for performing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11267439A true JPH11267439A (en) | 1999-10-05 |
Family
ID=14169591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10096608A Pending JPH11267439A (en) | 1998-03-24 | 1998-03-24 | Gas separation and gas separator for performing same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11267439A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008053681A1 (en) * | 2006-10-31 | 2008-05-08 | Gas And Power Investment Co., Ltd. | Flammable gas concentration system |
| JP2013154340A (en) * | 2012-01-06 | 2013-08-15 | Kyuchaku Gijutsu Kogyo Kk | Method and apparatus for adsorption separation of oxygen and nitrogen from air |
| US8932387B2 (en) | 2010-01-26 | 2015-01-13 | Osaka Gas Co., Ltd. | Enrichment system for combustible gas |
| US8940081B2 (en) | 2010-01-26 | 2015-01-27 | Osaka Gas Co., Ltd. | Combustible gas enrichment apparatus |
| JP2017202447A (en) * | 2016-05-11 | 2017-11-16 | コフロック株式会社 | Gas separator |
| CN115364617A (en) * | 2022-08-04 | 2022-11-22 | 河北金利康科技集团有限公司 | Medical oxygen generation system and method |
| CN116534802A (en) * | 2023-05-08 | 2023-08-04 | 海安建荣制氧有限公司 | Novel cut-in type oxygen purification device |
-
1998
- 1998-03-24 JP JP10096608A patent/JPH11267439A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008053681A1 (en) * | 2006-10-31 | 2008-05-08 | Gas And Power Investment Co., Ltd. | Flammable gas concentration system |
| US8328913B2 (en) | 2006-10-31 | 2012-12-11 | Osaka Gas Co., Ltd. | Flammable gas concentration system |
| US8932387B2 (en) | 2010-01-26 | 2015-01-13 | Osaka Gas Co., Ltd. | Enrichment system for combustible gas |
| US8940081B2 (en) | 2010-01-26 | 2015-01-27 | Osaka Gas Co., Ltd. | Combustible gas enrichment apparatus |
| JP2013154340A (en) * | 2012-01-06 | 2013-08-15 | Kyuchaku Gijutsu Kogyo Kk | Method and apparatus for adsorption separation of oxygen and nitrogen from air |
| JP2017014101A (en) * | 2012-01-06 | 2017-01-19 | 吸着技術工業株式会社 | Method for separating and acquiring oxygen from air by adsorption separation and device therefor |
| JP2017202447A (en) * | 2016-05-11 | 2017-11-16 | コフロック株式会社 | Gas separator |
| CN115364617A (en) * | 2022-08-04 | 2022-11-22 | 河北金利康科技集团有限公司 | Medical oxygen generation system and method |
| CN116534802A (en) * | 2023-05-08 | 2023-08-04 | 海安建荣制氧有限公司 | Novel cut-in type oxygen purification device |
| CN116534802B (en) * | 2023-05-08 | 2024-01-16 | 海安建荣制氧有限公司 | Cut-in type oxygen purification device |
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