JPS6317205A - Method for concentrating oxygen in air for combustion - Google Patents
Method for concentrating oxygen in air for combustionInfo
- Publication number
- JPS6317205A JPS6317205A JP61160123A JP16012386A JPS6317205A JP S6317205 A JPS6317205 A JP S6317205A JP 61160123 A JP61160123 A JP 61160123A JP 16012386 A JP16012386 A JP 16012386A JP S6317205 A JPS6317205 A JP S6317205A
- Authority
- JP
- Japan
- Prior art keywords
- column
- air
- adsorbent
- oxygen
- desorption
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000001301 oxygen Substances 0.000 title claims abstract description 28
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 16
- 238000003795 desorption Methods 0.000 claims abstract description 27
- 239000003463 adsorbent Substances 0.000 claims abstract description 25
- 238000001179 sorption measurement Methods 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 40
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 abstract description 7
- 239000000498 cooling water Substances 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 4
- 239000010419 fine particle Substances 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 238000002336 sorption--desorption measurement Methods 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010457 zeolite Substances 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
この発明は酸素・窒素分離用吸着剤を空気と接触させ、
吸・脱着操作を行うことにより燃焼用空気の酸素を濃縮
する方法に関するものである。[Detailed Description of the Invention] [Technical Field] This invention involves bringing an adsorbent for oxygen/nitrogen separation into contact with air,
This invention relates to a method for concentrating oxygen in combustion air by performing adsorption/desorption operations.
現在、吸着剤を使って空気中の酸素を分離する方法とし
て実用化されているのは圧力スイング法のみである。こ
の方法は吸着剤を充填した槽内に空気を流し、圧力を上
下させることにより、窒素と酸素の吸・脱着特性の差を
利用して酸素を分離する。Currently, the pressure swing method is the only method in practical use to separate oxygen from the air using an adsorbent. In this method, air is passed through a tank filled with adsorbent, and the pressure is raised and lowered to separate oxygen using the difference in adsorption and desorption characteristics between nitrogen and oxygen.
圧カスイング法は吸着剤を充填した固定層方式を用いて
いるため、吸・脱着操作の切り換えが必要になり、酸素
を一定濃度に濃縮した空気を連続して得るためには問題
がある。さらに、多量の酸素濃縮空気を必要とする場合
、吸着剤タンクを大型化すると吸着熱の発生のためタン
ク内に部分的な温度の偏りが生じ、安定操業が回置にな
る。Since the pressure casing method uses a fixed bed method filled with adsorbent, it is necessary to switch between adsorption and desorption operations, which poses a problem in continuously obtaining air enriched with oxygen to a constant concentration. Furthermore, when a large amount of oxygen-enriched air is required, increasing the size of the adsorbent tank causes local temperature imbalances within the tank due to the generation of heat of adsorption, and stable operation becomes reversible.
この発明の目的は、吸・脱着法により燃焼用空気の酸素
を濃縮する際に見られる前記問題を解決し、酸素を一定
濃度に濃縮した空気を連続して燃焼装置に供給すること
にある。An object of the present invention is to solve the above-mentioned problems encountered when concentrating oxygen in combustion air by the adsorption/desorption method, and to continuously supply air enriched with oxygen to a constant concentration to a combustion device.
本発明によれば、窒素に選択吸着性を示す酸素・窒素分
離用吸着剤粒子を空気で流動化状態にして吸着塔、脱着
塔及び冷却塔を循環させる循環流動層を用い、かつ燃焼
装置から排出される高温排ガスの熱エネルギーを脱着操
作に利用することによって、吸着塔から酸素富化空気を
抜出し、脱着塔から窒素富化空気を抜出することを特徴
とする燃焼用空気の酸素を吸・脱着法により濃縮する方
法が提供される。According to the present invention, a circulating fluidized bed is used in which adsorbent particles for oxygen/nitrogen separation that exhibit selective adsorption to nitrogen are fluidized with air and circulated through an adsorption tower, a desorption tower, and a cooling tower, and A method for absorbing oxygen from combustion air characterized by extracting oxygen-enriched air from an adsorption tower and extracting nitrogen-enriched air from a desorption tower by utilizing the thermal energy of the discharged high-temperature exhaust gas for desorption operations. - A method for concentrating by desorption method is provided.
流動層内では固体粒子は上昇する気泡によって流動化さ
れ、あたかも沸騰する液体のような状態になり、固体粒
子を流体のごとく取り扱うことができる。そして、流動
層内の温度は均一で、層内に置かれた固体熱源との伝熱
係数は極めて大きい。In a fluidized bed, solid particles are fluidized by rising bubbles, creating a state similar to that of a boiling liquid, and the solid particles can be treated like a fluid. The temperature within the fluidized bed is uniform, and the heat transfer coefficient with the solid heat source placed within the bed is extremely large.
本発明では、この流動層の特徴を利用して空気中の酸素
を濃縮するもので、そのためには幾つかのフローシステ
ムが可能であるが、基本的には吸着、脱着、冷却の３つ
の単位操作の組み合わせによって行われる。すなわち、
本発明では、低温の吸着流動層で窒素を吸着した吸着剤
粒子は流動化状態で脱着流動層に移動し、ここで燃焼装
置から排出される高温廃ガスにより熱交換器を通して加
熱され、窒素を脱着する。脱着した粒子は冷却流動層で
冷却されたのち、再び吸着流動層に戻される。吸着流動
層では吸着されなかった酸素およびその他の気体が燃焼
用空気として燃焼装置に供給される。The present invention utilizes the characteristics of this fluidized bed to condense oxygen in the air. For this purpose, several flow systems are possible, but basically there are three units: adsorption, desorption, and cooling. It is done by a combination of operations. That is,
In the present invention, the adsorbent particles that have adsorbed nitrogen in the low-temperature adsorption fluidized bed are transferred in a fluidized state to the desorption fluidized bed, where they are heated through a heat exchanger by the high-temperature waste gas discharged from the combustion device, and the nitrogen is removed. Put on and take off. The desorbed particles are cooled in the cooling fluidized bed and then returned to the adsorption fluidized bed. Oxygen and other gases that are not adsorbed in the adsorption fluidized bed are supplied to the combustion device as combustion air.
この発明の１つの実施例を図面に基づいて説明する。図
中、３は冷却塔、４は吸着塔、６は脱着塔である。３．
４．６はいずれも流動層で吸着剤粒子は流動化状態にあ
る。ここで用いられる吸着剤は窒素を選択吸着し得るも
のであればよく、従来公知のものが用いられるが、好ま
しくは、例えば。One embodiment of this invention will be described based on the drawings. In the figure, 3 is a cooling tower, 4 is an adsorption tower, and 6 is a desorption tower. 3.
4.6 are both fluidized beds and the adsorbent particles are in a fluidized state. The adsorbent used here may be any adsorbent as long as it can selectively adsorb nitrogen, and conventionally known adsorbents can be used, but preferably, for example.
粒径が０．１ｍｍ以下のゼオライト系酸素・窒素分離用
吸着剤粒子で窒素を選択的に吸着するものが用いられる
。冷却塔３と脱着塔６はステンレスパイプを蛇巻状にし
た熱交換器９、ＩＯが内蔵されている。Zeolite-based oxygen/nitrogen separation adsorbent particles with a particle size of 0.1 mm or less that selectively adsorb nitrogen are used. The cooling tower 3 and the desorption tower 6 have built-in heat exchangers 9 and IOs made of stainless steel pipes in a snake-like shape.
脱着塔６の熱交換器１０には燃焼装置１１から排出され
る高温の排ガスＦが流され、冷却塔３の熱交換器９には
冷却水Ｂが流されている。図面におけるＳで示した形状
の矢印は吸着剤粒子の流れ方向を示し、Ｔで示した形状
の矢印は気体及び冷却水の流れ方向を示す。High-temperature exhaust gas F discharged from the combustion device 11 is passed through the heat exchanger 10 of the desorption tower 6, and cooling water B is passed through the heat exchanger 9 of the cooling tower 3. In the drawings, arrows shaped like S indicate the flow direction of adsorbent particles, and arrows shaped like T indicate the flow direction of gas and cooling water.
供給される空気によって流動化状態にあり、かつ、２０
℃以下に冷却されている吸着塔４内の吸着剤粒子は空気
中の窒素を選択的に吸着し、流動化状態で輸送管５を下
降し、脱着塔６に移動する。脱着塔に入った粒子はブロ
ワ−２から補給される空気Ａにより流動化状態で上部に
移動する。この移動する過程で吸着剤粒子は高温廃ガス
Ｆの熱交換器１０によって２００℃以上に加熱されて窒
素を脱着し、脱着塔の上部から輸送管７を通ってホルダ
ー８に移動する。ホルダー下部から落下する粒子はブロ
ワ−２から供給される空気流れによって流動化状態で冷
却塔３を上昇し、吸着塔４に入る。この冷却塔３内の上
昇過程で吸着剤粒子は冷却水Ｂの熱交換器９によって２
０℃以下に冷却され、吸着塔４内で再び空気中の窒素を
吸着し、脱着塔６へと循環する。is in a fluidized state by the supplied air, and
The adsorbent particles in the adsorption tower 4, which has been cooled to below .degree. C., selectively adsorb nitrogen in the air, descend through the transport pipe 5 in a fluidized state, and move to the desorption tower 6. The particles entering the desorption tower are fluidized and moved to the upper part by air A supplied from the blower 2. During this moving process, the adsorbent particles are heated to 200° C. or higher by the heat exchanger 10 for the high-temperature waste gas F, desorb nitrogen, and move from the upper part of the desorption tower to the holder 8 through the transport pipe 7. Particles falling from the lower part of the holder ascend the cooling tower 3 in a fluidized state by the air flow supplied from the blower 2, and enter the adsorption tower 4. During the rising process in the cooling tower 3, the adsorbent particles are transferred to the cooling water B by the heat exchanger 9.
It is cooled to 0° C. or below, adsorbs nitrogen in the air again in the adsorption tower 4, and is circulated to the desorption tower 6.
ブロワ−２から供給される原料空気Ａは除塵器１で空気
中のほこりが除かれ、冷却塔３を通って吸着塔４内に入
り、その空気中の窒素が吸着剤に吸着される。吸着塔上
部から出る気体は窒素が除かれた気体、すなわち酸素が
濃縮された空気であり、サイクロン１２で微細粒子が除
去されたのち酸素富化１空気Ｃとして燃焼装置１１に供
給される。The raw air A supplied from the blower 2 has dust removed from the air by a dust remover 1, passes through a cooling tower 3, enters an adsorption tower 4, and nitrogen in the air is adsorbed by an adsorbent. The gas coming out from the upper part of the adsorption tower is a gas from which nitrogen has been removed, that is, air enriched with oxygen, and after fine particles are removed by a cyclone 12, it is supplied to the combustion device 11 as oxygen-enriched air C.
ブロワ−２から供給される空気流れの一部は脱着塔６に
入り、塔内の粒子を流動化状態にするために用いられる
。脱着塔６の頂上から出る気体は窒素富化空気りであり
、サイクロン１２で微細粒子が除去されたのち大気中に
放出される。A portion of the air stream supplied from the blower 2 enters the desorption column 6 and is used to fluidize the particles within the column. The gas exiting from the top of the desorption tower 6 is nitrogen-enriched air, and after fine particles are removed by the cyclone 12, it is released into the atmosphere.
〔発明の効果〕
この発明は以上説明したように、吸着剤粒子を流動化状
態で吸着塔、脱着塔及び冷却塔を循環させ、燃焼装置の
高温廃ガスの熱エネルギーを利用することにより、常圧
下で酸素を一定濃度に濃縮した燃焼用酸素富化空気を連
続して製造することができる。従って、圧力スイング法
のように吸・脱着操作のための加圧・減圧切り換えの必
要が無い。また、装置を大型化して大量の酸素富化空気
を必要とする場合にも、流動層を用いているので装置内
の温度は均一に保持され、安定操業が容易に行われる。[Effects of the Invention] As explained above, the present invention circulates adsorbent particles in a fluidized state through an adsorption tower, a desorption tower, and a cooling tower, and utilizes the thermal energy of high-temperature waste gas from a combustion device. It is possible to continuously produce oxygen-enriched air for combustion in which oxygen is concentrated to a constant concentration under pressure. Therefore, unlike the pressure swing method, there is no need to switch between pressurization and depressurization for suction and desorption operations. Furthermore, even when the equipment is enlarged and a large amount of oxygen-enriched air is required, the use of a fluidized bed maintains a uniform temperature within the equipment, facilitating stable operation.
図面はこの発明の１つの実施例を示す装置系統甲−１−
図である。
１・・・除塵器、２・・・ブロワ−１３・・・冷却塔。
４・・・吸着塔、５、７・・・輸送管、６・・・脱着塔
、８・・・ホルダー、９．１０・・・熱交換器、１１・
・・燃焼装置、１２．１３．１４・・・サイクロン、Ａ
・・・空気、Ｂ・・・冷却水、Ｃ・・・酸素富化空気、
Ｄ・・・窒素富化空気、Ｅ・・・廃ガス処理装置、Ｆ・
・・高温廃ガス。
指定代理人 工業技術院北海道工業開発試験所長後藤藤
太部
図面The drawing is a diagram of an apparatus system A-1 showing one embodiment of the present invention. 1... Dust remover, 2... Blower-13... Cooling tower. 4... Adsorption tower, 5, 7... Transport pipe, 6... Desorption tower, 8... Holder, 9.10... Heat exchanger, 11.
...Combustion device, 12.13.14...Cyclone, A
...Air, B...Cooling water, C...Oxygen-enriched air,
D... Nitrogen enriched air, E... Waste gas treatment equipment, F.
...High temperature waste gas. Designated agent: Director of Hokkaido Industrial Development and Testing Institute, Agency of Industrial Science and Technology
Claims (1)
粒子を空気で流動化状態にして吸着塔、脱着塔及び冷却
塔を循環させる循環流動層を用い、かつ燃焼装置から排
出される高温排ガスの熱エネルギーを脱着操作に利用す
ることによって、吸着塔から酸素富化空気を抜出し、脱
着塔から窒素富化空気を抜出することを特徴とする燃焼
用空気の酸素を吸・脱着法により濃縮する方法。(1) A circulating fluidized bed is used in which adsorbent particles for oxygen/nitrogen separation that exhibit selective adsorption to nitrogen are fluidized with air and circulated through an adsorption tower, a desorption tower, and a cooling tower, and are discharged from a combustion device. A method for adsorbing and desorbing oxygen from combustion air, which is characterized by extracting oxygen-enriched air from an adsorption tower and extracting nitrogen-enriched air from a desorption tower by utilizing the thermal energy of high-temperature exhaust gas for desorption operations. method of concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61160123A JPS6317205A (en) | 1986-07-07 | 1986-07-07 | Method for concentrating oxygen in air for combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61160123A JPS6317205A (en) | 1986-07-07 | 1986-07-07 | Method for concentrating oxygen in air for combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6317205A true JPS6317205A (en) | 1988-01-25 |
Family
ID=15708362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61160123A Pending JPS6317205A (en) | 1986-07-07 | 1986-07-07 | Method for concentrating oxygen in air for combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6317205A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50127422A (en) * | 1974-03-25 | 1975-10-07 | ||
| JPS5335681A (en) * | 1976-09-16 | 1978-04-03 | Daikin Ind Ltd | Continuous adsorber using activated carbon |
| JPS5462994A (en) * | 1977-10-28 | 1979-05-21 | Mitsubishi Heavy Ind Ltd | Production of oxygen-enriched air |
-
1986
- 1986-07-07 JP JP61160123A patent/JPS6317205A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50127422A (en) * | 1974-03-25 | 1975-10-07 | ||
| JPS5335681A (en) * | 1976-09-16 | 1978-04-03 | Daikin Ind Ltd | Continuous adsorber using activated carbon |
| JPS5462994A (en) * | 1977-10-28 | 1979-05-21 | Mitsubishi Heavy Ind Ltd | Production of oxygen-enriched air |
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