JPH05221A - Separator for gaseous mixture - Google Patents
Separator for gaseous mixtureInfo
- Publication number
- JPH05221A JPH05221A JP3180237A JP18023791A JPH05221A JP H05221 A JPH05221 A JP H05221A JP 3180237 A JP3180237 A JP 3180237A JP 18023791 A JP18023791 A JP 18023791A JP H05221 A JPH05221 A JP H05221A
- Authority
- JP
- Japan
- Prior art keywords
- adsorption tower
- nitrogen gas
- adsorption
- gas
- towers
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸着剤を充填した吸着
塔の一方端から混合ガスである原料空気を供給し、前記
吸着剤に窒素ガス以外のガスを吸着せしめ、前記吸着塔
の他方端から窒素ガスを取り出す装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies raw material air, which is a mixed gas, from one end of an adsorption tower filled with an adsorbent so that the adsorbent adsorbs a gas other than nitrogen gas. The present invention relates to a device for taking out nitrogen gas from the end.
【０００２】[0002]
【従来の技術】従来、例えば２塔の吸着塔を備えるＮ2
−ＰＳＡ装置として図２に示すような装置が知られてい
る。同図に基づきこの装置を詳述すると、この装置は、
まずモレキュラーシービングカーボンを吸着剤として収
納する２つの吸着塔（１１０），（１１１）を備える。2. Description of the Related Art Conventionally, for example, N 2 provided with two adsorption towers
A device as shown in FIG. 2 is known as a PSA device. This device will be described in detail with reference to FIG.
First, two adsorption towers (110) and (111) that store molecular sieving carbon as an adsorbent are provided.
【０００３】そしてこの下端部には、原料空気供給用の
管（１０３）の下流端が弁（１２３），（１２５）を介
してそれぞれ接続されている。また、上記吸着塔（１１
０），（１１１）の下端部には、排ガス排出用の排出管
（１０５）の上流端が弁（１２４），（１２６）を介し
てそれぞれ接続されている。The lower ends of the pipes (103) for supplying raw material air are connected to the downstream ends of the pipes through valves (123) and (125), respectively. In addition, the adsorption tower (11
The upstream ends of the exhaust pipe (105) for exhaust gas discharge are connected to the lower ends of 0) and (111) via valves (124) and (126), respectively.
【０００４】一方、上記吸着塔（１１０），（１１１）
の上方端には、製品ガス管（１０４）の上流端が弁（１
２０），（１２１）を介して接続されている。さらに、
２つの吸着塔（１１０），（１１１）は均圧管（１０
６）によって弁（１２２）を介して互いに連絡されてい
る。また、製品槽（１１２）の下方端には、製品ガス管
（１０４）の下流端が接続され、製品槽（１１２）の下
方端には、製品ガス取出管（１０７）が弁（１２７）を
介し接続されている。On the other hand, the adsorption towers (110), (111)
At the upper end of the product gas pipe (104), the upstream end of the valve (1
20) and (121). further,
The two adsorption towers (110) and (111) are pressure equalizing tubes (10
6) are connected to each other via a valve (122). The downstream end of the product gas pipe (104) is connected to the lower end of the product tank (112), and the product gas extraction pipe (107) has a valve (127) at the lower end of the product tank (112). Connected through.
【０００５】そして以上の構成を備える装置に対して、
吸着工程，均圧工程，脱着工程で構成される工程を１サ
イクルとして実施し、上述した窒素ガスを製造する。た
だし、２つの吸着塔（１１０），（１１１）において
は、工程の位相が１／２サイクルずれた状態で連続運転
され、製品ガス管（１０４）と吸着塔（１１０），（１
１１）とを接続する弁（１２０），（１２１）が開閉す
ることにより、分離した高純度窒素ガスを製品槽（１１
２）に連続的に蓄えるようになっている。And for the device having the above configuration,
A process including an adsorption process, a pressure equalizing process, and a desorption process is performed as one cycle to produce the above-mentioned nitrogen gas. However, the two adsorption towers (110) and (111) are continuously operated with the process phase shifted by 1/2 cycle, and the product gas pipe (104) and the adsorption towers (110) and (1) are operated.
By opening and closing the valves (120) and (121) that connect with (11), the separated high-purity nitrogen gas is removed from the product tank (11).
It is designed to store continuously in 2).
【０００６】次に、上記１サイクルの工程を前記吸着塔
（１１０）を中心に説明する。まず、弁（１２０），
（１２３），（１２６），（１２７）を開き、弁（１２
１），（１２２），（１２４），（１２５）を閉じて、
前工程で常圧再生済みの吸着塔（１１０）にコンプレッ
サー（１０２）から弁（１２３）を介して原料空気を供
給する一方、製品槽（１１２）からは製品ガス管（１０
４）を介して高純度窒素ガスを還流し、これら原料空気
と高純度窒素ガスにより吸着塔（１１０）を昇圧する。Next, the one cycle process will be described focusing on the adsorption tower (110). First, the valve (120),
Open (123), (126), (127) and open the valve (12
1), (122), (124), (125) are closed,
While the raw material air is supplied from the compressor (102) through the valve (123) to the adsorption tower (110) which has been subjected to normal pressure regeneration in the previous step, the product gas pipe (10) is supplied from the product tank (112).
High-purity nitrogen gas is refluxed via 4), and the pressure of the adsorption tower (110) is increased by these raw material air and high-purity nitrogen gas.
【０００７】そして、上記原料空気内の酸素成分が上記
吸着塔（１１０）内の吸着剤に優先的に吸着され、吸着
塔（１１０）内の圧力が製品槽（１１２）内の圧力と同
圧となった後、さらに原料空気が供給されて昇圧される
と、窒素ガスが吸着塔（１１０）の上端から取り出さ
れ、製品ガス管（１０４）及び弁（１２０）を介して高
純度窒素ガスが製品槽（１１２）に蓄えられる（吸着工
程）。The oxygen component in the raw material air is preferentially adsorbed by the adsorbent in the adsorption tower (110), and the pressure in the adsorption tower (110) is the same as the pressure in the product tank (112). Then, when the raw material air is further supplied and the pressure is increased, nitrogen gas is taken out from the upper end of the adsorption tower (110), and high-purity nitrogen gas is generated through the product gas pipe (104) and the valve (120). It is stored in the product tank (112) (adsorption step).
【０００８】次に、吸着塔（１１０）内の吸着剤が飽和
状態に達すると、弁（１２０），（１２３），（１２
６）を閉じ、弁（１２２）を開いて、吸着塔（１１０）
内の残存ガスを均圧管（１０６）及び弁（１２２）を介
して、常圧再生終了後の吸着塔（１１１）内に供給しこ
れを昇圧する（均圧工程）。Next, when the adsorbent in the adsorption tower (110) reaches a saturated state, the valves (120), (123), (12)
6) closed, valve (122) opened, adsorption tower (110)
The residual gas inside is supplied through the pressure equalizing pipe (106) and the valve (122) into the adsorption tower (111) after the completion of the normal pressure regeneration to increase the pressure (pressure equalizing step).
【０００９】次に、上記均圧工程終了後、弁（１２２）
を閉じ、弁（１２１），（１２４），（１２５）を開く
ことにより、吸着塔（１１０）内に残ったガスを、弁
（１２４）を介して排気管（１０５）から放出し、上記
吸着工程で吸着剤に吸着されていた酸素成分を脱着する
と共に、これを大気に排出する（再生工程）。Next, after the pressure equalizing step is completed, the valve (122)
By closing the valve and opening the valves (121), (124), (125), the gas remaining in the adsorption tower (110) is discharged from the exhaust pipe (105) through the valve (124), and the adsorption is performed. The oxygen component adsorbed by the adsorbent in the process is desorbed and discharged to the atmosphere (regeneration process).
【００１０】[0010]
【発明が解決しようとする課題】ところが、上記従来の
Ｎ2 −ＰＳＡ装置においては以下に述べるような問題が
あった。However, the above-mentioned conventional N 2 -PSA apparatus has the following problems.
【００１１】即ち、吸着工程初期の昇圧時において、製
品槽（１１２）からの還流ガスとコンプレッサー（１０
１）からの原料空気とが、吸着塔（１１０），（１１
１）内で急激に衝突する結果、低純度の窒素ガスが吸着
塔上部にまでおよぶことがあり、吸着塔（１１０），
（１１１）内が昇圧される前に吸着塔（１１０），（１
１１）上部に移動したガスは、吸着剤との接触時間が非
常に短いため、酸素成分がほとんど吸着されないまま後
方の原料空気により吸着塔（１１０），（１１１）外に
押し出され、製品槽（１１２）へと蓄えられる。これに
より、製品ガスの純度が低下するのである。That is, at the time of pressurization in the initial stage of the adsorption process, the reflux gas from the product tank (112) and the compressor (10
The raw material air from 1) is absorbed by the adsorption towers (110) and (11).
As a result of the rapid collision in 1), low-purity nitrogen gas may reach the upper part of the adsorption tower, and the adsorption tower (110),
Before the pressure in the (111) is increased, the adsorption towers (110), (1
11) The gas that has moved to the upper part has a very short contact time with the adsorbent, and therefore is pushed out of the adsorption towers (110) and (111) by the raw material air in the rear while the oxygen component is hardly adsorbed, and the product tank ( 112). This reduces the purity of the product gas.
【００１２】この発明は、このような従来の問題を解決
するためになされたものであり、吸着塔の昇圧時に発生
する２種のガスの衝突，攪乱を防止し、製品窒素ガスの
純度を向上させることが出来る装置の提供を目的とす
る。The present invention has been made in order to solve such a conventional problem, and prevents the collision and disturbance of two kinds of gas generated when the pressure of the adsorption tower is increased, thereby improving the purity of the product nitrogen gas. The purpose is to provide a device that can be operated.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
の本発明は、吸着剤を充填した吸着塔の一方端から混合
ガスである原料空気を供給し、前記吸着剤に窒素ガス以
外のガスを吸着せしめ、前記吸着塔の他方端から窒素ガ
スを取り出す装置において、前記吸着塔を複数の吸着塔
から構成し、且つ該複数の吸着塔の端部同士を吸着塔の
口径より小さい口径の連結管で連結せしめて一列の吸着
塔列を形成し、該吸着塔列の一方端から前記原料ガスを
供給して、他方端から窒素ガスを取り出し得るようにし
たことを要旨とするものである。Means for Solving the Problems The present invention for achieving the above object is to supply raw material air, which is a mixed gas, from one end of an adsorption tower filled with an adsorbent, and to supply gas other than nitrogen gas to the adsorbent. In a device for extracting nitrogen gas from the other end of the adsorption tower, the adsorption tower is composed of a plurality of adsorption towers, and the end portions of the plurality of adsorption towers are connected to each other with a diameter smaller than the diameter of the adsorption tower. The gist of the invention is that one row of the adsorption tower row is formed by connecting with a pipe, the raw material gas is supplied from one end of the adsorption tower row, and the nitrogen gas can be taken out from the other end.
【００１４】[0014]
【作用】次に上述した本発明の作用を吸着塔が二塔であ
る場合を例に説明する。吸着工程において、まず、一列
に形成した吸着塔列の一方の吸着塔の端部から所定圧の
原料空気を供給する一方、他方の吸着塔の端部から高純
度の窒素ガスを還流する。Next, the operation of the present invention described above will be described by taking the case where there are two adsorption towers as an example. In the adsorption step, first, raw material air having a predetermined pressure is supplied from one end of one adsorption tower of the adsorption tower row formed in one line, while high-purity nitrogen gas is refluxed from the other end of the adsorption tower.
【００１５】すると、前記一方の吸着塔内には原料空気
が流入し、他方の吸着塔内には高純度の窒素ガスが流入
して原料空気と高純度窒素ガスは吸着塔間の略中間部で
ある連結管部内で衝突する。即ち、供給された原料空気
は所定の速度分布で吸着塔内を移動するが、移動速度の
速い原料空気は吸着剤との接触時間が短いため、酸素ガ
ス等が十分に吸着されず低純度の窒素ガスのまま連結管
に向け移動し、同部で他方の吸着塔内を移動してきた高
純度窒素ガスと衝突する。Then, the raw material air flows into one of the adsorption towers, and the high-purity nitrogen gas flows into the other adsorption tower so that the raw material air and the high-purity nitrogen gas are substantially in the middle portion between the adsorption towers. The collision occurs in the connecting pipe part. That is, the supplied raw material air moves in the adsorption tower with a predetermined velocity distribution, but since the raw material air having a high moving speed has a short contact time with the adsorbent, oxygen gas or the like is not sufficiently adsorbed and has a low purity. The nitrogen gas moves toward the connecting pipe as it is, and collides with the high-purity nitrogen gas moving in the other adsorption tower at the same portion.
【００１６】これに際し、連結管の口径を吸着塔の口径
よりも小さくしているので、衝突によるガスの攪乱によ
り低濃度の窒素ガスが前記他方の吸着塔の他方端に達す
るのが防止される。At this time, since the diameter of the connecting pipe is made smaller than that of the adsorption tower, the low concentration nitrogen gas is prevented from reaching the other end of the other adsorption tower due to the gas disturbance caused by collision. ..
【００１７】しかして、原料空気の継続供給により一方
の吸着塔内が昇圧されると、前記低純度の窒素ガスは徐
々に他方の吸着塔内に移動し、その移動過程で残余の酸
素ガス等が吸着剤に吸着され、所定濃度の窒素ガスとな
って他方の吸着塔の端部から漏出する。However, when the pressure in one of the adsorption towers is increased by the continuous supply of the raw material air, the low-purity nitrogen gas gradually moves into the other adsorption tower, and in the course of the movement, residual oxygen gas, etc. Is adsorbed by the adsorbent, becomes nitrogen gas of a predetermined concentration, and leaks from the end of the other adsorption tower.
【００１８】以上、吸着塔が二塔である場合について説
明したが、吸着塔が三塔以上である場合も同様である。
即ち、供給される原料空気と還流される高純度窒素ガス
は一列に形成される吸着塔列の略中央で衝突するが、こ
の衝突の位置と高純度の窒素ガスを取り出す吸着塔との
間に少なくとも一つの前記連結管が介在するため、充分
に吸着作用を受けていない低純度の窒素ガスが純度の窒
素ガスを取り出す吸着塔内の同取り出し部に達するのを
防止することができる。従って、吸着工程当初から所定
の高純度窒素ガスを得ることが出来る。Although the case where there are two adsorption towers has been described above, the same applies to the case where there are three or more adsorption towers.
That is, the supplied raw material air and the refluxed high-purity nitrogen gas collide with each other at approximately the center of the adsorption tower row formed in one row, but between this collision position and the adsorption tower for taking out the high-purity nitrogen gas. Since at least one of the connecting pipes is interposed, it is possible to prevent low-purity nitrogen gas that has not been sufficiently subjected to the adsorption action from reaching the same take-out portion in the adsorption tower for taking out the nitrogen gas of high purity. Therefore, a predetermined high-purity nitrogen gas can be obtained from the beginning of the adsorption process.
【００１９】尚、設ける吸着塔の数が多ければ多い程高
純度の窒素ガスが得られるが、求められる窒素ガス濃
度，経済性等を考慮して適宜に設定する必要がある。It should be noted that the higher the number of adsorption towers provided, the higher the purity of nitrogen gas that can be obtained. However, it is necessary to properly set the nitrogen gas concentration in consideration of the required nitrogen gas concentration, economic efficiency and the like.
【００２０】[0020]
【実施例】以下、本発明の実施例について添付図面に基
づいて説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００２１】図１は本発明の一実施例を示す説明図であ
る。同図に示すように、実施例装置はコンプレッサー
（２）と、４つの吸着塔（３０），（３１），（３
２），（３３）と、製品槽（３４）とを備えている。FIG. 1 is an explanatory view showing an embodiment of the present invention. As shown in the figure, the apparatus of the embodiment has a compressor (2) and four adsorption towers (30), (31), (3).
2), (33) and a product tank (34).
【００２２】そして、弁（１５）を有する連結管（４）
の一方端を前記吸着塔（３１）の下部に接続し、他方端
を前記吸着塔（３０）の上部に接続して吸着塔（３０）
と吸着塔（３１）とを一列に連結し、また、弁（１６）
を有する連結管（５）の一方端を前記吸着塔（３２）の
下部に接続し、他方端を前記吸着塔（３３）の上部に接
続して吸着塔（３２）と吸着塔（３３）とを一列に連結
している。尚、連結管（４），（５）の口径は吸着塔
（３０），（３１），（３２），（３３）のそれと比べ
充分に小となっている。A connecting pipe (4) having a valve (15)
One end is connected to the lower part of the adsorption tower (31), and the other end is connected to the upper part of the adsorption tower (30) so that the adsorption tower (30)
And the adsorption tower (31) are connected in a line, and the valve (16)
One end of the connecting pipe (5) having the above is connected to the lower part of the adsorption tower (32) and the other end is connected to the upper part of the adsorption tower (33) to form the adsorption tower (32) and the adsorption tower (33). Are connected in a line. The diameters of the connecting pipes (4) and (5) are sufficiently smaller than those of the adsorption towers (30), (31), (32) and (33).
【００２３】また、弁（１０）を有する供給管（３）の
一方端を前記コンプレッサー（２）に接続すると共に他
方端を吸着塔（３０）の下部に接続し、また、前記弁
（１０），コンプレッサー（２）間の供給管（３）から
分岐し、弁（１９）を有する供給管（３′）の端部を吸
着塔（３３）の下部に接続している。Further, one end of the supply pipe (3) having the valve (10) is connected to the compressor (2) and the other end is connected to the lower part of the adsorption tower (30), and the valve (10) is also connected. , A branch from the supply pipe (3) between the compressors (2), and the end of the supply pipe (3 ') having the valve (19) is connected to the lower part of the adsorption tower (33).
【００２４】また、弁（１１）を有する排気管（７）の
一方端を前記吸着塔（３０）と弁（１０）との間の供給
管（３）に接続し、他方端を開放すると共に、弁（２
０）を有する排気管（７′）の一方端を吸着塔（３３）
と弁（１９）との間の供給管（３）に接続し、その他方
端を前記排気管（７）に接続している。Also, one end of the exhaust pipe (7) having the valve (11) is connected to the supply pipe (3) between the adsorption tower (30) and the valve (10), and the other end is opened. , Valve (2
0) with one end of the exhaust pipe (7 ') being an adsorption tower (33)
Is connected to the supply pipe (3) between the valve and the valve (19), and the other end is connected to the exhaust pipe (7).
【００２５】また、弁（１２）を有する製品ガス管
（６）の一方端を前記吸着塔（３１）の上部に接続する
一方、その他方端を製品槽（３４）の上部に接続すると
共に、弁（１３）を有する製品ガス管（６′）の一方端
を前記製品ガス管（６）に接続し、その他方端を前記吸
着塔（３２）の上部に接続している。Further, one end of the product gas pipe (6) having the valve (12) is connected to the upper part of the adsorption tower (31), while the other end is connected to the upper part of the product tank (34), One end of the product gas pipe (6 ') having a valve (13) is connected to the product gas pipe (6), and the other end is connected to the upper part of the adsorption tower (32).
【００２６】そして、弁（１４）を有する均圧管（４
０）の一方端を前記弁（１２）と前記吸着塔（３１）と
の間の製品ガス管（６）に接続すると共に、その他方端
を前記弁（１３）と吸着塔（３２）との間の製品ガス管
（６′）に接続している。また、弁（１７）を有する均
圧管（４１）の一方端を前記弁（１５）と吸着塔（３
１）との間の連結管（４）に接続すると共に、その他方
端を前記弁（１６）と吸着塔（３２）との間の連結管
（５）に接続している。また、弁（１８）を有する均圧
管（４２）の一方端を前記弁（１５）と吸着塔（３０）
との間の連結管（４）に接続し、他方端を前記弁（１
６）と吸着塔（３３）との間の連結管（５）に接続して
いる。A pressure equalizing pipe (4) having a valve (14)
0) one end is connected to the product gas pipe (6) between the valve (12) and the adsorption tower (31), and the other end is connected to the valve (13) and the adsorption tower (32). It is connected to the product gas line (6 ') in between. Further, one end of the pressure equalizing pipe (41) having the valve (17) is connected to the valve (15) and the adsorption tower (3).
It is connected to a connecting pipe (4) between the valve (16) and the adsorption tower (32) and is connected to the connecting pipe (4) between the valve (16) and the adsorption tower (32). Further, one end of the pressure equalizing pipe (42) having the valve (18) is connected to the valve (15) and the adsorption tower (30).
Connected to a connecting pipe (4) between the valve and the valve (1
It is connected to the connecting pipe (5) between 6) and the adsorption tower (33).
【００２７】そして弁（２１）を有する製品供給管（３
５）の一方端を製品槽（３４）の下部に接続し、その他
方端を所定の窒素ガス使用側に接続している。And a product supply pipe (3) having a valve (21)
5) One end is connected to the lower part of the product tank (34) and the other end is connected to the side where a predetermined nitrogen gas is used.
【００２８】次に上述した実施例装置により窒素ガスを
製造する態様について説明する。Next, a mode of producing nitrogen gas by the apparatus of the above-mentioned embodiment will be described.
【００２９】まず、吸着塔（３０），（３１），（３
２），（３３）が均圧工程を終了したところから説明す
る。この時、弁（１０），（１１），（１２），（１
３），（１５），（１６），（１９），（２０）は閉じ
ており、弁（１４），（１７），（１８），（２１）は
開いている。First, the adsorption towers (30), (31), (3
2) and (33) will be described from the point where the pressure equalization step is completed. At this time, the valves (10), (11), (12), (1
3), (15), (16), (19) and (20) are closed and the valves (14), (17), (18) and (21) are open.
【００３０】次に、吸着塔（３０），（３１）に対し吸
着工程を、吸着塔（３２），（３３）に対し再生工程を
実施するものとする。このためには、まず、弁（１
４），（１７），（１８）を閉じ、弁（１０），（１
１），（１５），（１６），（２０）を開く。これによ
り吸着塔（３０）には原料の圧縮空気が供給されて吸着
塔（３０）が昇圧されると共に吸着塔（３１）には製品
槽（３４）から製品ガス（窒素ガス）が還流されて吸着
塔（３１）が昇圧されると同時に前記原料空気と製品ガ
スは連結管（４）の略中央で衝突する。即ち、吸着塔
（３０）に供給された原料空気は所定の速度分布で吸着
塔（３０）内を他方端である連結管（４）に向け移動す
る。そして、この移動過程で吸着剤に接触して、原料空
気のうち酸素ガスが吸着剤に吸着され窒素ガス濃度が高
められる。しかるに、上述した如く、供給される原料空
気は所定の速度分布を有しているため、移動速度の速い
ものは吸着剤との接触時間が短く、充分に酸素ガスが吸
着除去されない低濃度の窒素ガスのまま連結管（４）に
向け移動する。Next, the adsorption step is performed on the adsorption towers (30) and (31), and the regeneration step is performed on the adsorption towers (32) and (33). In order to do this, the valve (1
4), (17), (18) are closed and the valves (10), (1
Open 1), (15), (16) and (20). As a result, compressed air as a raw material is supplied to the adsorption tower (30) to increase the pressure of the adsorption tower (30) and the product gas (nitrogen gas) is circulated from the product tank (34) to the adsorption tower (31). At the same time when the pressure in the adsorption tower (31) is increased, the raw material air and the product gas collide with each other in the approximate center of the connecting pipe (4). That is, the raw material air supplied to the adsorption tower (30) moves in the adsorption tower (30) toward the connecting pipe (4) at the other end with a predetermined velocity distribution. Then, during this movement process, the adsorbent is brought into contact with the adsorbent, and oxygen gas in the raw material air is adsorbed by the adsorbent to increase the nitrogen gas concentration. However, as described above, since the feed air to be supplied has a predetermined velocity distribution, the one with a fast moving speed has a short contact time with the adsorbent, and the nitrogen gas has a low concentration so that the oxygen gas is not sufficiently adsorbed and removed. The gas moves toward the connecting pipe (4).
【００３１】一方、製品ガスも同様に所定の速度分布で
吸着塔（３１）内を移動するが、製品ガスの圧力と原料
空気の圧力が略等しい場合にはこれらは略同速度で移動
するため、これらは吸着塔列の略中央である連結管
（４）内で衝突することになるのである。これに際し、
連結管（４）の口径を吸着塔（３０），（３１）のそれ
よりも充分に小さくしているので、衝突によりガスが拡
散し、低濃度の窒素ガスが吸着塔（３１）の製品ガス管
（６）付近に到達するのが防止される。On the other hand, the product gas also moves in the adsorption tower (31) with a predetermined velocity distribution, but when the pressure of the product gas and the pressure of the raw material air are substantially equal, they move at substantially the same velocity. However, these collide with each other in the connecting pipe (4) which is substantially in the center of the adsorption tower array. In doing this,
Since the diameter of the connecting pipe (4) is made sufficiently smaller than that of the adsorption towers (30) and (31), the gas is diffused by the collision, and the low concentration nitrogen gas is the product gas of the adsorption tower (31). Reaching near the pipe (6) is prevented.
【００３２】尚、この例では弁（１５）を開くこととし
たが、弁（１５）を閉じておけば低純度の窒素ガスが吸
着塔（３１）内に移動するのを確実に防止することがで
き、さらに好適である。しかして、これによれば原料空
気は吸着塔（３１）には供給されず、吸着塔（３０）の
みに供給され、吸着塔（３０）においては窒素ガス以外
のガスが吸着剤に吸着されてある程度の純度の窒素ガス
で充満され、ついで弁（１５）を開くと、吸着塔（３
０）で分離された低純度の窒素ガスは吸着塔（３０）と
吸着塔（３１）との圧力差によって徐々に吸着塔（３
１）に移動する。これにより吸着塔（３１）における吸
着時間が十分に確保されて低純度の窒素ガスは所定純度
の窒素ガスとなる。Although the valve (15) is opened in this example, if the valve (15) is closed, it is possible to reliably prevent low-purity nitrogen gas from moving into the adsorption tower (31). It is possible and more preferable. Thus, according to this, the raw material air is not supplied to the adsorption tower (31) but is supplied only to the adsorption tower (30), and in the adsorption tower (30), a gas other than nitrogen gas is adsorbed by the adsorbent. When the valve (15) was opened by being filled with nitrogen gas having a certain degree of purity, the adsorption tower (3
The low-purity nitrogen gas separated in 0) is gradually absorbed by the adsorption tower (3) due to the pressure difference between the adsorption tower (30) and the adsorption tower (31).
Move to 1). As a result, the adsorption time in the adsorption tower (31) is sufficiently secured and the low-purity nitrogen gas becomes nitrogen gas of a predetermined purity.
【００３３】以上により、従来問題となっていた低純度
の窒素ガスが吸着塔（３１）から排出されるという不具
合を解消することが出来る。As described above, it is possible to solve the problem that low-purity nitrogen gas, which has been a conventional problem, is discharged from the adsorption tower (31).
【００３４】他方、吸着塔（３２），（３３）において
は、塔内に充満している低純度の窒素ガスが塔外に放出
されて、塔内の吸着剤が再生される。On the other hand, in the adsorption towers (32) and (33), low-purity nitrogen gas filled in the towers is released to the outside of the towers to regenerate the adsorbent in the towers.
【００３５】ついで、吸着塔（３０），（３１）に所定
時間吸着工程を実施した後、弁（１０），（１２），
（１５），（１６），（２０）を閉じて、弁（１４），
（１７），（１８）を開いて均圧工程を実施する。これ
により、吸着塔（３１）内の上部に存在するガスが均圧
管（４０）を介して吸着塔（３２）の上部から塔内に移
動すると共に吸着塔（３１）内の下部に存在するガスが
均圧管（４１）を介して吸着塔（３２）の下部から塔内
に移動する一方、吸着塔（３０）内のガスが均圧管（４
２）を介して吸着塔（３３）に移動する。これにより、
吸着塔（３２），（３３）内は、吸着塔（３０），（３
１）内の窒素ガスにより置換される。Then, after performing the adsorption process on the adsorption towers (30), (31) for a predetermined time, the valves (10), (12),
Close the valves (15), (16) and (20) to open the valves (14),
(17) and (18) are opened and a pressure equalizing step is performed. As a result, the gas existing in the upper part of the adsorption tower (31) moves from the upper part of the adsorption tower (32) into the tower through the pressure equalizing pipe (40) and the gas existing in the lower part of the adsorption tower (31). Move from the lower part of the adsorption tower (32) into the tower through the pressure equalization tube (41), while the gas in the adsorption tower (30) moves to the pressure equalization tube (4).
It moves to the adsorption tower (33) via 2). This allows
Inside the adsorption towers (32) and (33) are adsorption towers (30) and (3).
It is replaced by the nitrogen gas in 1).
【００３６】吸着工程終了時においては、吸着塔（３
０）内の窒素ガスは吸着塔（３１）内のそれより低純度
であるが、弁（１７）及び（１８）を設けなければ、吸
着塔（３０），（３１）内の窒素ガスは弁（１４）のみ
を介して吸着塔（３２），（３３）に移動するため、吸
着塔（３２）の上部は最も純度の低い吸着塔（３０）内
の窒素ガスで置換され、吸着塔（３２），（３３）に吸
着工程を実施すると、当初は所定純度以下の窒素ガスが
取り出されるのである。At the end of the adsorption step, the adsorption tower (3
The nitrogen gas in the adsorption tower (31) has a lower purity than that in the adsorption tower (31), but if the valves (17) and (18) are not provided, the nitrogen gas in the adsorption towers (30) and (31) is Since it moves to the adsorption towers (32) and (33) via only (14), the upper part of the adsorption tower (32) is replaced with the nitrogen gas in the adsorption tower (30) of the lowest purity, and the adsorption tower (32) ), (33) is subjected to the adsorption step, the nitrogen gas having a predetermined purity or lower is initially taken out.
【００３７】これを解消すべく実施例では弁（１７），
（１８）を設け、吸着塔（３０）の低純度窒素ガスが吸
着塔（３２）に移動するのを防止すると共に、吸着塔
（３１）の上記の高純度の窒素ガスを吸着塔（３２）の
上部に移動させ且つ吸着塔（３１）の比較的低純度の窒
素ガスを吸着塔（３２）の下部に移動させることによ
り、吸着工程の実施当初より所定純度の窒素ガスを取り
出すことが出来る。In order to solve this, in the embodiment, the valve (17),
(18) is provided to prevent the low-purity nitrogen gas in the adsorption tower (30) from moving to the adsorption tower (32), and the high-purity nitrogen gas in the adsorption tower (31) is adsorbed in the adsorption tower (32). By moving the nitrogen gas having a relatively low purity of the adsorption tower (31) to the lower portion of the adsorption tower (32), the nitrogen gas having a predetermined purity can be taken out from the beginning of the adsorption step.
【００３８】ついで、弁（１４），（１７），（１８）
を閉じ、弁（１１），（１５），（１３），（１６），
（１９）を開いて吸着塔（３０），（３１）に対し再生
工程を、吸着塔（３２），（３３）に対し吸着工程を実
施する。Then, the valves (14), (17), (18)
And close the valves (11), (15), (13), (16),
(19) is opened and the adsorption towers (30) and (31) are subjected to a regeneration step, and the adsorption towers (32) and (33) are subjected to an adsorption step.
【００３９】以後、吸着塔（３０），（３１）並びに吸
着塔（３２），（３３）に対して交番的に吸着工程，均
圧工程を実施することにより所定純度の窒素ガスを製品
槽（３４）に貯留することが出来る。Thereafter, the adsorption towers (30) and (31) and the adsorption towers (32) and (33) are alternately subjected to the adsorption step and the pressure equalization step, whereby nitrogen gas having a predetermined purity is supplied to the product tank ( 34) can be stored.
【００４０】＜具体例＞図１に示す実施例装置並びに図
２に示す従来の装置に対し、原料である空気を２３５Ｎ
Ｌ／ｍｉｎ（コンプレッサーの設定圧力８．５ｋｇｆ／
ｃｍ2 ）で供給し、窒素ガスを５０ＮＬ／ｍｉｎ取り出
すようにしたところ、吸着工程の当初の取り出し窒素ガ
ス純度が従来の装置では９９．９０％であったのに対
し、実施例装置では９９．９５％となり、０．０５％の
改善を図ることが出来た。<Specific Example> In comparison with the apparatus of the embodiment shown in FIG. 1 and the conventional apparatus shown in FIG.
L / min (Compressor set pressure 8.5 kgf /
was supplied at cm 2), it was a nitrogen gas to extract 50 NL / min, while the initial extraction nitrogen gas purity adsorption step was 99.90% in the conventional apparatus, in the embodiment device 99. It was 95%, which was an improvement of 0.05%.
【００４１】[0041]
【発明の効果】以上詳述したように本発明によれば、複
数の吸着塔の端部同士を連結管で連結して一列の吸着塔
列を形成し、しかも連結管の口径を吸着塔の口径よりも
小径としているので、吸着工程において吸着塔に供給さ
れる原料空気と高純度窒素ガスとが衝突するに際し、低
純度窒素ガスが拡散して高純度窒素ガスを取り出す吸着
塔内の同取り出し部に到達するのが防止される。従っ
て、吸着工程の当初において、低純度の窒素ガスが取り
出されるという不具合を生じず、当初から所定の高純度
窒素ガスを得ることができる。As described in detail above, according to the present invention, the ends of a plurality of adsorption towers are connected to each other by a connecting pipe to form a row of adsorption towers. Since the diameter is smaller than the diameter, when the raw material air supplied to the adsorption tower and the high-purity nitrogen gas collide in the adsorption step, the low-purity nitrogen gas diffuses and takes out the high-purity nitrogen gas. It is prevented from reaching the section. Therefore, at the beginning of the adsorption step, a problem that low-purity nitrogen gas is taken out does not occur, and a predetermined high-purity nitrogen gas can be obtained from the beginning.
【図１】本発明装置の一実施例の概要を示す説明図であ
る。FIG. 1 is an explanatory diagram showing an outline of an embodiment of a device of the present invention.
【図２】従来の窒素ガス分離装置の概要を示す説明図で
ある。FIG. 2 is an explanatory diagram showing an outline of a conventional nitrogen gas separation device.
２ コンプレッサー ３ 供給管 ４ 連結管 ５ 連結管 ６ 製品ガス管 ７ 排気管 ３０ 吸着塔 ３１ 吸着塔 ３２ 吸着塔 ３３ 吸着塔 ３４ 製品槽 ４０ 均圧管 ４１ 均圧管 ４２ 均圧管 2 Compressor 3 Supply pipe 4 Connection pipe 5 Connection pipe 6 Product gas pipe 7 Exhaust pipe 30 Adsorption tower 31 Adsorption tower 32 Adsorption tower 33 Adsorption tower 34 Product tank 40 Pressure equalizing pipe 41 Pressure equalizing pipe 42 Pressure equalizing pipe
Claims (1)
合ガスである原料空気を供給し、前記吸着剤に窒素ガス
以外のガスを吸着せしめ、前記吸着塔の他方端から窒素
ガスを取り出す装置において、前記吸着塔を複数の吸着
塔から構成し、且つ該複数の吸着塔の端部同士を吸着塔
の口径より小さい口径の連結管で連結せしめて一列の吸
着塔列を形成し、該吸着塔列の一方端から前記原料ガス
を供給して、他方端から窒素ガスを取り出し得るように
したことを特徴とする混合気体の分離装置。Claim: What is claimed is: 1. A raw material air which is a mixed gas is supplied from one end of an adsorption tower filled with an adsorbent to adsorb a gas other than nitrogen gas to the adsorbent, and the other side of the adsorption tower. In an apparatus for taking out nitrogen gas from the end, the adsorption tower is composed of a plurality of adsorption towers, and the ends of the plurality of adsorption towers are connected to each other by a connecting pipe having a diameter smaller than the diameter of the adsorption tower to form a row of adsorption towers. An apparatus for separating a mixed gas, characterized in that a row is formed, and the raw material gas is supplied from one end of the adsorption tower row, and nitrogen gas can be taken out from the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3180237A JPH05221A (en) | 1991-06-24 | 1991-06-24 | Separator for gaseous mixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3180237A JPH05221A (en) | 1991-06-24 | 1991-06-24 | Separator for gaseous mixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05221A true JPH05221A (en) | 1993-01-08 |
Family
ID=16079769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3180237A Pending JPH05221A (en) | 1991-06-24 | 1991-06-24 | Separator for gaseous mixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05221A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710076A (en) * | 1980-06-18 | 1982-01-19 | Hitachi Ltd | Regenerator of adsorption tower |
| JPS63232819A (en) * | 1987-03-23 | 1988-09-28 | Hitachi Ltd | Multilayer adsorptive separation |
| JPH01104325A (en) * | 1986-04-04 | 1989-04-21 | Calgon Carbon Corp | Adsorption molecular sieve for pressure swing of auxiliary bed |
-
1991
- 1991-06-24 JP JP3180237A patent/JPH05221A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710076A (en) * | 1980-06-18 | 1982-01-19 | Hitachi Ltd | Regenerator of adsorption tower |
| JPH01104325A (en) * | 1986-04-04 | 1989-04-21 | Calgon Carbon Corp | Adsorption molecular sieve for pressure swing of auxiliary bed |
| JPS63232819A (en) * | 1987-03-23 | 1988-09-28 | Hitachi Ltd | Multilayer adsorptive separation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100254295B1 (en) | Pressure swing adsorption process with a single adsorbent bed | |
| US5133785A (en) | Separation of multicomponent gas mixtures by selective adsorption | |
| CA2148527C (en) | Vacuum swing adsorption process with mixed repressurization and provide product depressurization | |
| EP0714690B1 (en) | Pressure swing adsorption process | |
| US4913709A (en) | Adsorption process for recovering two high purity gas products from multicomponent gas mixtures | |
| US3986849A (en) | Selective adsorption process | |
| EP0008882B1 (en) | Separation of multicomponent gas mixtures by pressure swing adsorption | |
| KR100260001B1 (en) | Pressure swing adsorption process | |
| EP0462778B1 (en) | Pressure swing adsorption method for separating gaseous mixtures | |
| US5540758A (en) | VSA adsorption process with feed/vacuum advance and provide purge | |
| EP0699467B1 (en) | Simultaneous step pressure swing adsorption process | |
| JPH0929044A (en) | Reflux in pressure swing type suction method | |
| JPS63240915A (en) | Gas separation method | |
| US5997611A (en) | Single vessel gas adsorption system and process | |
| JPH0463726B2 (en) | ||
| JPH05221A (en) | Separator for gaseous mixture | |
| JPH04227018A (en) | Manufacture of inert gas of high purity | |
| US4722742A (en) | Pressure swing adsorption | |
| JP7013338B2 (en) | Pressure fluctuation adsorption device | |
| JP3165964B2 (en) | Pressure fluctuation adsorption type gas separation method | |
| JPH0938443A (en) | Gas separator | |
| JP3561886B2 (en) | Pressure fluctuation adsorption separation method | |
| JP3073061B2 (en) | Gas separation device | |
| TW200304849A (en) | Pressure swing adsorption process with controlled internal depressurization flow | |
| JPH0377618A (en) | Method and device for separating gas |