JPH0647541Y2 - High-purity nitrogen gas separation device by pressure fluctuation adsorption method - Google Patents
High-purity nitrogen gas separation device by pressure fluctuation adsorption methodInfo
- Publication number
- JPH0647541Y2 JPH0647541Y2 JP5958489U JP5958489U JPH0647541Y2 JP H0647541 Y2 JPH0647541 Y2 JP H0647541Y2 JP 5958489 U JP5958489 U JP 5958489U JP 5958489 U JP5958489 U JP 5958489U JP H0647541 Y2 JPH0647541 Y2 JP H0647541Y2
- Authority
- JP
- Japan
- Prior art keywords
- product
- nitrogen gas
- tank
- carbon dioxide
- adsorption
- 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 - Lifetime
Links
Landscapes
- Separation Of Gases By Adsorption (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Description
【考案の詳細な説明】 《産業上の利用分野》 本発明は、空気を原料として高純度の窒素ガスを分離す
る圧力変動吸着方式（以下、PSA方式という）での窒素
ガスの分離装置の改良に関する。[Detailed Description of the Invention] << Industrial field of application >> The present invention relates to an improvement of a nitrogen gas separation device by a pressure fluctuation adsorption method (hereinafter referred to as PSA method) for separating high-purity nitrogen gas from air as a raw material. Regarding
《従来技術》 PSA方式で空気から窒素ガスを分離生成する手段として
は、分子篩炭の有する酸素と窒素の吸着速度差を利用す
るものが一般的である。これは、例えば特開昭63−2744
30号公報に示されているように、圧縮機と吸着槽と製品
槽とを直列に配置し、吸着槽内に分子篩炭からなる吸着
剤を充填し、製品槽からガス取出路を導出して、窒素ガ
スを空気から分離生成していた。<< Prior Art >> As a means for separating and generating nitrogen gas from air by the PSA method, it is general to use the difference in adsorption rate between oxygen and nitrogen of molecular sieve coal. This is disclosed, for example, in JP-A-63-2744.
As shown in Japanese Patent Publication No. 30, a compressor, an adsorption tank, and a product tank are arranged in series, an adsorbent made of molecular sieve coal is filled in the adsorption tank, and a gas extraction path is led out from the product tank. , Nitrogen gas was produced separately from air.
また、空気中の水分、炭酸ガスの除去を目的として、吸
着槽の上流側に前処理槽を配置するように下ものも提案
されている。In addition, for the purpose of removing water and carbon dioxide in the air, a lower one has been proposed in which a pretreatment tank is arranged on the upstream side of the adsorption tank.
《解決しようとする課題》 前記従来のPSA方式の窒素ガス分離装置では、吸着槽内
に分子篩炭からなる吸着剤を充填していることから、酸
素とともに二酸化炭素も吸着して、かなり高純度の窒素
ガスを分離生成することができるのであるが、この従来
の窒素ガス分離装置で生成された窒素ガスを極低温冷凍
機等を使用して液化処理すると、コールドヘッド部分に
形成された雪状の生成物が液中に混入して液体窒素の液
が濁ることがあった。この雪状生成物は液体窒素を蒸発
させた際に痕跡を残すことなく蒸発していることから、
ドライアイススノーであると考えられる。つまり、従来
のPSA方式の窒素ガス分離装置では、空気中の二酸化炭
素を完全には除去することができず、製品ガス中に二酸
化炭素が不純物として混入するという問題があった。ま
た、前処理槽を配置したものでも極微少の二酸化炭素ガ
スを除去することは困難であるうえ、吸着剤の頻繁な再
生を要するという問題があった。<Problems to be solved> In the conventional PSA type nitrogen gas separation device, since the adsorbent composed of molecular sieve charcoal is filled in the adsorption tank, it also adsorbs carbon dioxide together with oxygen, and has a considerably high purity. Nitrogen gas can be separated and produced, but if the nitrogen gas produced by this conventional nitrogen gas separation device is liquefied using a cryogenic refrigerator, etc., it will be snow-like formed on the cold head part. In some cases, the product was mixed into the liquid and the liquid nitrogen liquid became cloudy. Since this snow-like product evaporates without leaving a trace when liquid nitrogen is evaporated,
Considered to be dry ice snow. That is, the conventional PSA-type nitrogen gas separation device cannot completely remove carbon dioxide in the air, and there is a problem that carbon dioxide is mixed as an impurity in the product gas. Further, it is difficult to remove a very small amount of carbon dioxide gas even with a pretreatment tank arranged, and there is a problem that the adsorbent needs to be frequently regenerated.
本考案は、このような点に着目してなされたもので、二
酸化炭素も確実に除去した高純度の窒素ガスを生成でき
る窒素ガス分離装置を提供することを目的とする。The present invention has been made paying attention to such a point, and an object thereof is to provide a nitrogen gas separation device capable of producing high-purity nitrogen gas from which carbon dioxide is surely removed.
《課題を解決するための手段》 上述の目的を達成するために、本考案は、吸着槽より下
流側に配置した製品槽内に二酸化炭素吸着用の吸着剤を
充填し、吸着槽から送り出された製品窒素ガスから二酸
化炭素を除去するように構成したことを特徴としてい
る。<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention fills an adsorbent for adsorbing carbon dioxide into a product tank arranged on the downstream side of the adsorption tank, and discharges it from the adsorption tank. The product is configured to remove carbon dioxide from nitrogen gas.
《作用》 本考案では、吸着槽より下流側に配置した製品槽内に二
酸化炭素吸着用の吸着剤を充填し、吸着槽から送り出さ
れた製品窒素ガスから二酸化炭素を除去するように構成
しているので、二酸化炭素吸着用の吸着剤は吸着槽から
取り出された製品ガスと接触して、製品ガス中に混入し
ている二酸化炭素ガスを確実に除去することになり、高
純度の窒素ガスを得ることができる。<Operation> In the present invention, the product tank located downstream of the adsorption tank is filled with an adsorbent for adsorbing carbon dioxide, and the product nitrogen gas sent from the adsorption tank is configured to remove carbon dioxide. Since the adsorbent for adsorbing carbon dioxide comes into contact with the product gas taken out from the adsorption tank, the carbon dioxide gas mixed in the product gas is surely removed, and the high-purity nitrogen gas is removed. Obtainable.
《実施例》 図面は本考案の実施例を示す概略構成図である。この窒
素ガス発生装置（１）は、圧力変動吸着方式により純度
99％以上の窒素ガスを大気から分離生成するものであっ
て、空気圧縮機（２）と、分子篩炭からなる吸着剤を充
填した吸着槽（３）と、製品槽（４）とが直列に配置し
てあり、空気圧縮機（２）と吸着槽（３）とを空気供給
路（５）で連通するとともに、吸着槽（３）と製品槽
（４）とが製品ガス通路（６）で連通させてある。そし
て、吸着槽（３）は複数の処理槽を並列配置して選択的
に使用するようにしてある。空気供給路（５）には圧縮
空気冷却用熱交換器（７）とフイルター（８）とを配置
して空気中の水分を除去するようにしてある。<< Embodiment >> A drawing is a schematic block diagram showing an embodiment of the present invention. This nitrogen gas generator (1) has a purity by pressure fluctuation adsorption method.
A device for separating and producing 99% or more of nitrogen gas from the atmosphere. An air compressor (2), an adsorption tank (3) filled with an adsorbent composed of molecular sieve coal, and a product tank (4) are connected in series. The air compressor (2) and the adsorption tank (3) communicate with each other through the air supply path (5), and the adsorption tank (3) and the product tank (4) form a product gas passage (6). It is in communication. The adsorption tank (3) has a plurality of processing tanks arranged in parallel and selectively used. A heat exchanger (7) for cooling compressed air and a filter (8) are arranged in the air supply path (5) to remove water in the air.
また、吸着槽（３）の空気流入側から導出した再生路
（９）は空気圧縮機（２）と一体に形成した真空ポンプ
（10）に連通させてあり、空気供給路（５）、再生路
（９）及び製品ガス通路（６）に配置した流路開閉弁
（11）の開閉制御で吸着槽（３）を吸着使用状態でと再
生状態とに切り換えるようにしてある。Further, the regeneration passage (9) derived from the air inflow side of the adsorption tank (3) is connected to a vacuum pump (10) formed integrally with the air compressor (2), and the air supply passage (5) and regeneration are performed. The adsorption tank (3) is switched between the adsorption use state and the regeneration state by the opening / closing control of the passage opening / closing valve (11) arranged in the passage (9) and the product gas passage (6).
製品槽（４）内にはポアサイズが３Å程度のゼオライト
で形成した吸着剤（12）が後処理用として充填してあ
る。この吸着剤（12）はカートリッジ状に形成してあ
り、製品槽（４）に容易に着脱できるようにしてある。
そして、吸着槽（３）で除去しきれずに製品ガスに混入
した状態で製品槽（４）に流入した二酸化炭素ガスをこ
の吸着剤（12）で吸収除去することにより、高純度にな
った窒素ガスを製品槽（４）から製品取出路（13）で取
り出すことになる。そして、この製品取出路（13）には
上流側から、減圧弁付きフィルター（14）、電磁式流路
開閉弁（15）、流量計（16）、流量調整弁（17）が順に
配置してある。The product tank (4) is filled with an adsorbent (12) made of zeolite with a pore size of about 3Å for post-treatment. The adsorbent (12) is formed in a cartridge shape so that it can be easily attached to and detached from the product tank (4).
Then, the carbon dioxide gas flowing into the product tank (4) in a state of being mixed with the product gas without being completely removed by the adsorption tank (3) is absorbed and removed by the adsorbent (12), whereby nitrogen having a high purity is obtained. Gas is taken out from the product tank (4) through the product take-out path (13). Then, a filter (14) with a pressure reducing valve, an electromagnetic flow path opening / closing valve (15), a flow meter (16), and a flow rate adjusting valve (17) are arranged in this order from the upstream side in this product take-out path (13). is there.
図中符号（18）はサイレンサー、（19）は安全弁であ
る。In the figure, reference numeral (18) is a silencer, and (19) is a safety valve.
第２図は本考案の別実施例を示し、これは製品槽（４）
の取り出し口（20）に製品取出路開閉弁（21）を配置
し、この製品取出路開閉弁（21）と減圧弁付きフィルタ
ー（14）との間の製品取出路（13）に二酸化炭素吸着剤
（12）を充填した二酸化炭素吸着槽（22）を配置したも
のである。なお、この二酸化炭素吸着槽（22）は二基並
列に配置し、交互に使用するようにしてもよいい。FIG. 2 shows another embodiment of the present invention, which is a product tank (4).
A product take-out opening / closing valve (21) is placed at the take-out port (20), and carbon dioxide is adsorbed in the product taking-out path (13) between the product take-out opening / closing valve (21) and the filter with a pressure reducing valve (14). A carbon dioxide adsorption tank (22) filled with the agent (12) is arranged. The carbon dioxide adsorption tanks (22) may be arranged in parallel and used alternately.
また、本考案を膜型富化窒素製造装置に利用することも
可能である。Further, the present invention can be applied to a membrane-type enriched nitrogen production apparatus.
《効果》 本考案では、圧力変動吸着方式の窒素ガス分離装置にお
いて、吸着槽より下流側に配置した製品槽内あるいは製
品槽より下流側に二酸化炭素吸着用の吸着剤を充填し、
吸着槽から送り出された製品窒素ガスに含まれている極
微少量の二酸化炭素を除去するように構成しているの
で、二酸化炭素吸着用の吸着剤は吸着槽から取り出され
た製品ガスと接触して、製品ガス中に混入している極微
少量の二酸化炭素ガスを確実に除去することになり、高
純度の窒素ガスを得ることができる。しかも、この吸着
剤は製品窒素に含まれている極微少量の二酸化炭素を吸
着するものであるから、その劣化速度も遅く、再生の手
間が少なくてすむ。<Effect> In the present invention, in a nitrogen gas separation device of pressure fluctuation adsorption method, an adsorbent for carbon dioxide adsorption is filled in the product tank arranged on the downstream side of the adsorption tank or on the downstream side of the product tank,
Since it is configured to remove a very small amount of carbon dioxide contained in the product nitrogen gas sent out from the adsorption tank, the adsorbent for carbon dioxide adsorption contacts the product gas taken out from the adsorption tank. Therefore, a very small amount of carbon dioxide gas mixed in the product gas can be surely removed, and nitrogen gas of high purity can be obtained. Moreover, since this adsorbent adsorbs a very small amount of carbon dioxide contained in the product nitrogen, its adsorbing rate is slow, and the time and effort for regeneration can be reduced.
図面は本考案の実施例を示し、第１図は圧力変動吸着方
式による窒素分離装置の概略回路図、第２図は別実施例
の第１図相当図である。 ２…空気圧縮機、３…吸着槽、 ４…製品槽、12…吸着剤、 13…ガス取出路、22…二酸化炭素吸着槽。The drawing shows an embodiment of the present invention, FIG. 1 is a schematic circuit diagram of a nitrogen separation apparatus by a pressure fluctuation adsorption system, and FIG. 2 is a view corresponding to FIG. 1 of another embodiment. 2 ... Air compressor, 3 ... Adsorption tank, 4 ... Product tank, 12 ... Adsorbent, 13 ... Gas extraction path, 22 ... Carbon dioxide adsorption tank.
Claims (2)
槽（３）、製品槽（４）を順に直列に接続し、製品槽
（４）から製品取出路（13）を導出し、空気を原料とし
て窒素ガスを分離生成するように構成した圧力変動吸着
方式による窒素ガス分離装置において、 製品槽（４）内に二酸化炭素吸着用の吸着剤（12）を充
填し、吸着槽（３）から送り出された製品窒素ガスから
二酸化炭素を除去するように構成したことを特徴とする
圧力変動吸着方式による高純度窒素ガス分離装置1. An air compressor (2), an adsorption tank (3) filled with an adsorbent, and a product tank (4) are sequentially connected in series, and a product take-out path (13) is led out from the product tank (4). In a nitrogen gas separation device by a pressure fluctuation adsorption method configured to separate and generate nitrogen gas from air as a raw material, a product tank (4) is filled with an adsorbent (12) for adsorbing carbon dioxide, and the adsorption tank ( 3) A high-purity nitrogen gas separation device by a pressure fluctuation adsorption method, characterized in that it is configured to remove carbon dioxide from the product nitrogen gas sent from 3).
において、製品槽（４）よりも下流側の製品取出路（1
3）に二酸化炭素吸着槽（22）を配置し、この二酸化炭
素吸着槽（22）に二酸化炭素吸着剤（12）を充填したこ
とを特徴とする圧力変動吸着方式による高純度窒素ガス
分離装置2. A nitrogen gas separation apparatus using a pressure fluctuation adsorption method, wherein a product take-out path (1) downstream of a product tank (4) is used.
A carbon dioxide adsorption tank (22) is arranged in 3), and this carbon dioxide adsorption tank (22) is filled with a carbon dioxide adsorbent (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5958489U JPH0647541Y2 (en) | 1989-05-23 | 1989-05-23 | High-purity nitrogen gas separation device by pressure fluctuation adsorption method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5958489U JPH0647541Y2 (en) | 1989-05-23 | 1989-05-23 | High-purity nitrogen gas separation device by pressure fluctuation adsorption method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02150020U JPH02150020U (en) | 1990-12-25 |
| JPH0647541Y2 true JPH0647541Y2 (en) | 1994-12-07 |
Family
ID=31586208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5958489U Expired - Lifetime JPH0647541Y2 (en) | 1989-05-23 | 1989-05-23 | High-purity nitrogen gas separation device by pressure fluctuation adsorption method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0647541Y2 (en) |
-
1989
- 1989-05-23 JP JP5958489U patent/JPH0647541Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02150020U (en) | 1990-12-25 |
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