JPH02275214A - Oxygen enriched combustion device of solid fuel - Google Patents
Oxygen enriched combustion device of solid fuelInfo
- Publication number
- JPH02275214A JPH02275214A JP1096391A JP9639189A JPH02275214A JP H02275214 A JPH02275214 A JP H02275214A JP 1096391 A JP1096391 A JP 1096391A JP 9639189 A JP9639189 A JP 9639189A JP H02275214 A JPH02275214 A JP H02275214A
- Authority
- JP
- Japan
- Prior art keywords
- solid fuel
- nitrogen
- air
- oxygen
- furnace
- 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
- 239000004449 solid propellant Substances 0.000 title claims abstract description 44
- 239000001301 oxygen Substances 0.000 title claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 title claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 91
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 25
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 27
- 238000000926 separation method Methods 0.000 claims description 8
- 230000002269 spontaneous effect Effects 0.000 abstract description 4
- 239000000567 combustion gas Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 description 13
- 239000000446 fuel Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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】
〔産業上の利用分野〕
本発明は、空気中の窒素ガスを分離し、この窒素ガスと
酸素が富化された残存ガスとを利用する固体燃料の酸素
富化燃焼装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to oxygen-enriched combustion of solid fuel, which separates nitrogen gas from the air and utilizes this nitrogen gas and oxygen-enriched residual gas. Regarding equipment.
従来、ボイラ等において、固体燃料を燃焼させるには、
−船釣に空気が使用されており、また、固体燃料のガス
化装置には、空気又は深冷法等により得られた酸素を使
用している。Conventionally, in order to burn solid fuel in boilers etc.,
- Air is used for boat fishing, and solid fuel gasifiers use air or oxygen obtained by deep cooling.
固体燃料は、粒度、発熱量、灰分、含有水分揮発分等の
成分比により燃焼性が著しく異なり、空気により効率よ
く燃焼させるのが困難な場合もあり、また、良好な燃焼
性を得るため粒度を細かくしたり、充分な乾燥を行なっ
たり、燃焼空気を予熱する等の対策を講じる必要がある
。The combustibility of solid fuels varies significantly depending on the particle size, calorific value, ash content, water content volatile matter, etc., and it may be difficult to burn them efficiently in air. It is necessary to take measures such as making the combustion air finer, thoroughly drying it, and preheating the combustion air.
一方深冷法等により得られた高濃度の酸素を使用するこ
とにより固体燃料の良好な燃焼を得ることができるが、
酸素の製造コストが高くまた、酸素の取扱いに安全上の
配慮をする必要がある。On the other hand, good combustion of solid fuel can be obtained by using high concentration oxygen obtained by deep cooling method etc.
Oxygen is expensive to produce and requires safety considerations when handling oxygen.
本発明は上記に鑑みてなされたもので、空気より窒素ガ
スを分離し、この窒素ガスと酸素が富化された残存ガス
とによって固体燃料を効果的に燃焼させると共に固体燃
料の加圧、搬送貯蔵、を安全に行なうことができる固体
燃料の酸素富化燃焼装置を提供しようとするものである
。The present invention has been made in view of the above, and it separates nitrogen gas from air, effectively burns solid fuel with this nitrogen gas and oxygen-enriched residual gas, and pressurizes and transports the solid fuel. The purpose of the present invention is to provide an oxygen-enriched combustion device for solid fuel that can be safely stored.
本発明の固体燃料の酸素富化燃焼装置は、空気中の窒素
の分離装置、同分離装置により分離された窒素ガスを固
体燃料の加圧、搬送又は貯蔵設備へ供給する供給管、及
び上記分離装置で窒素が分離され酸素が富化された残存
ガスを上記固体燃料を燃焼させる炉へ供給する供給管を
備えた。The solid fuel oxygen-enriching combustion device of the present invention includes a nitrogen separation device in air, a supply pipe for supplying the nitrogen gas separated by the separation device to solid fuel pressurization, transportation, or storage equipment, and the above-mentioned separation device. A supply pipe was provided for supplying the residual gas enriched with oxygen from which nitrogen was separated in the apparatus to the furnace for burning the solid fuel.
（作 用〕
本発明においては、分離装置によって、空気中の窒素ガ
スと酸素が富化された残存ガスが得られる。(Function) In the present invention, a residual gas enriched with nitrogen gas and oxygen in the air is obtained by the separator.
この酸素富化残存ガスは供給管より炉へ供給され燃焼用
空気の一部として使用することによって固体燃料は良好
な燃焼が行なわれる。This oxygen-enriched residual gas is supplied to the furnace through the supply pipe and used as part of the combustion air, thereby ensuring good combustion of the solid fuel.
一方、窒素ガスは固体燃料の加圧、搬送又は貯蔵設備へ
供給することによって、燃料の自然発火が防止され、安
全性が向上する。On the other hand, by supplying nitrogen gas to solid fuel pressurization, transportation, or storage equipment, spontaneous combustion of the fuel is prevented and safety is improved.
Ｃ実施例〕
本発明の第一の実施例を第１図及び第２図によって説明
する。C Embodiment] A first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
１は空気中の窒素を吸着する圧力スイング窒素吸着装置
であって、同吸着装置１で吸着された窒素ガスは、吸着
装置１の窒素ガス管２９から送風機５により供給管６を
経て石炭等の固体燃料８の貯蔵ビン７へ供給されるよう
になっている。一方窒給管３から炉４へ供給されるよう
になっている。1 is a pressure swing nitrogen adsorption device that adsorbs nitrogen in the air, and the nitrogen gas adsorbed by the adsorption device 1 is sent from a nitrogen gas pipe 29 of the adsorption device 1 to a blower 5 through a supply pipe 6 to coal, etc. A storage bin 7 of solid fuel 8 is supplied. On the other hand, nitrogen is supplied from the nitrogen supply pipe 3 to the furnace 4.
固体燃料貯蔵ピン７下部には供給機９が連設されており
、同供給機９は１次空気送風機１０より空気が送られる
インジェクタ１１に接続され、供給機９から送られる固
体燃料は、同インジェクタ１１より燃料の供給管１２を
経て炉４に投入されるようになっている。A feeder 9 is connected to the lower part of the solid fuel storage pin 7. The feeder 9 is connected to an injector 11 to which air is sent from a primary air blower 10, and the solid fuel sent from the feeder 9 is Fuel is introduced into the furnace 4 from an injector 11 via a fuel supply pipe 12.
本実施例の圧力スイング窒素吸着装置１を第２図に示す
、吸着塔２４には窒素吸着剤２５が充填されており、原
空ブロワ２１から押込まれた空気は、大口弁２２を経て
吸着塔２４へ入り、窒素吸着剤２５によって選択的に窒
素が吸着され、酸素が富化された空気は、出口弁２６を
経て排空気管２７へ放出ガスとして排出され、前記送風
機２へ供給されるようになっている。The pressure swing nitrogen adsorption apparatus 1 of this embodiment is shown in FIG. 24, nitrogen is selectively adsorbed by the nitrogen adsorbent 25, and the oxygen-enriched air is discharged as a discharge gas to the exhaust air pipe 27 via the outlet valve 26, and is supplied to the blower 2. It has become.
一方吸着された窒素ガスは、窒素ガス管２９に設けられ
た真空ポンプ２８を作動することによって窒素吸着剤２
５から脱着され、出口弁２３を経て窒素ガス管２９へ排
出され前記送風機５へ供給される。On the other hand, the adsorbed nitrogen gas is transferred to the nitrogen adsorbent 2 by operating the vacuum pump 28 provided in the nitrogen gas pipe 29.
5 and is discharged through the outlet valve 23 to the nitrogen gas pipe 29 and supplied to the blower 5.
この吸着塔２４は第２図に示すように２塔以上並列に設
けられており、一方の吸着塔２４が窒素の吸着を行って
いるときに、他方の吸着塔２４が窒素の脱着を行うこと
によって、常に交替に窒素ガス及び酸素富化空気が製造
されるようになっている。Two or more adsorption towers 24 are installed in parallel as shown in FIG. 2, and when one adsorption tower 24 is adsorbing nitrogen, the other adsorption tower 24 is desorbing nitrogen. Nitrogen gas and oxygen-enriched air are constantly produced alternately.
本実施例では、圧力スイング窒素吸着装置ｌより製造さ
れた窒素ガスは、送風機５で加圧され、供給管６を経て
固体燃料貯蔵ビン７に送入され、固体燃料の自然発火を
防止することに供され、また同貯蔵ビン７内の固体燃料
の加圧に供される。In this embodiment, the nitrogen gas produced by the pressure swing nitrogen adsorption device 1 is pressurized by the blower 5 and sent to the solid fuel storage bin 7 through the supply pipe 6 to prevent spontaneous ignition of the solid fuel. It is also used to pressurize the solid fuel in the storage bin 7.
一方、圧力スイング窒素吸着装置１より窒素を吸着、分
離する過程で生じた放出ガス中には、窒素を分離した残
りの酸素が通常の空気より２〜３倍含まれており、この
放出ガスは、排空気管２７より送風機２に入って加圧さ
れ、供給管３を経て、炉内に吹込まれ、燃焼用空気とし
て利用される。On the other hand, the released gas generated in the process of adsorbing and separating nitrogen from the pressure swing nitrogen adsorption device 1 contains 2 to 3 times more oxygen than normal air, which remains after nitrogen is separated. The air enters the blower 2 through the exhaust pipe 27, is pressurized, is blown into the furnace through the supply pipe 3, and is used as combustion air.
固体燃料８は、供給機９を経て、１次空気送風機１０に
より送入された１次空気によりインジェクタ１１、供給
管１２を通り炉４に投入され、この１次空気と前述の酸
素富化空気により燃焼される。The solid fuel 8 is fed into the furnace 4 through the injector 11 and the supply pipe 12 by the primary air fed by the primary air blower 10 after passing through the feeder 9, and this primary air and the oxygen-enriched air mentioned above are fed into the furnace 4. is burned by
本実施例では、酸素富化空気を使用することにより燃焼
用空気量が減少するため燃焼温度は上昇し、燃料の燃焼
時間は、短縮され未燃損失は減少する。In this embodiment, by using oxygen-enriched air, the amount of combustion air is reduced, so the combustion temperature increases, the fuel combustion time is shortened, and unburned losses are reduced.
例えば、酸素濃度４０％の放出ガスと１次空気を合わせ
て、２５％濃度の混合比になるような酸素富化空気で固
体燃料を燃焼した場合、理論空気量は約２０％減少し、
この結果、理論燃焼ガス温度は２００〜３００’Ｃ上昇
するので、同一粒度の燃料を燃焼させても燃切り時間は
大巾に短縮され、未燃損失は減少する。For example, when solid fuel is burned with oxygen-enriched air such that the mixture ratio of released gas with an oxygen concentration of 40% and primary air is 25%, the theoretical air amount will decrease by approximately 20%.
As a result, the theoretical combustion gas temperature increases by 200 to 300'C, so even if fuel with the same particle size is burned, the burnout time is greatly shortened and unburned losses are reduced.
また、生成ガス量が約１５％減少するので排ガス１員失
が減少すると共に火炉や熱交換器をコンパクトにするこ
とができる。Furthermore, since the amount of generated gas is reduced by about 15%, the loss of exhaust gas per unit is reduced, and the furnace and heat exchanger can be made more compact.
また更に、空気から分離した窒素ガスを固体燃料貯蔵ビ
ン７に送入して、同貯蔵ビン７内のガスをパージするこ
とによって、燃料の自然発火を防止することができる。Furthermore, by feeding nitrogen gas separated from air into the solid fuel storage bin 7 and purging the gas in the storage bin 7, spontaneous combustion of the fuel can be prevented.
この場合、窒素ガスによる貯蔵ビン７内のガスパージに
は、通常固体燃料の約１０倍の体積の窒素ガスが必要で
あり、固体燃料が石炭の場合重量ベースでは固体燃料の
約１３％の窒素ガスを必要とするが、上記した酸素濃度
４０％の放出ガスを得る際に発生する窒素ガスによって
このガスパージを行なうことができる。In this case, purging the storage bin 7 with nitrogen gas usually requires a volume of nitrogen gas about 10 times that of the solid fuel, and if the solid fuel is coal, the nitrogen gas is about 13% of the solid fuel by weight. However, this gas purge can be performed using nitrogen gas generated when obtaining the above-described released gas with an oxygen concentration of 40%.
本発明の第二の実施例を第３図によって説明する。A second embodiment of the present invention will be described with reference to FIG.
本実施例は、上記第一の実施例における窒素ガスが分離
され酸素が富化されたガスの供給管３を燃料の供給管１
２に接続した０本実施例では酸素が富化されたガスを送
風機２によって加圧して、供給管３を経て燃料の供給管
１２へ供給し、固体燃料と混合して炉４へ投入する。In this embodiment, the gas supply pipe 3 in which nitrogen gas is separated and oxygen enriched in the first embodiment is replaced with the fuel supply pipe 1.
In this embodiment, oxygen-enriched gas is pressurized by a blower 2, supplied to a fuel supply pipe 12 via a supply pipe 3, mixed with solid fuel, and charged into a furnace 4.
本実施例においても、上記第一の実施例と同様な作用及
び効果が奏せられる。This embodiment also provides the same functions and effects as those of the first embodiment.
本発明の第三の実施例を第４図によって説明する。A third embodiment of the present invention will be described with reference to FIG.
本実施例では、別に設けられ送風機１４をもつ燃焼用空
気管１３に酸素が富化されたガスの供給管３を接続し、
燃焼用空気管１３を経て送風機１４よりの空気と共に上
記酸素が富化されたガスを炉４へ投入するようにした。In this embodiment, an oxygen-enriched gas supply pipe 3 is connected to a combustion air pipe 13 provided separately with a blower 14,
The oxygen-enriched gas was introduced into the furnace 4 together with the air from the blower 14 through the combustion air pipe 13.
本実施例も上記第−及び第二の実施例と同様な作用及び
効果をあげることができる。This embodiment can also provide the same functions and effects as the above-mentioned first and second embodiments.
なお、上記各実施例では、窒素ガスは固体燃料貯蔵ビン
に供給されているが、固体燃料の搬送管に供給し、同窒
素ガスで固体燃料の搬送を行なわせる等固体燃料の加圧
、搬送に利用することもできる。また、上記各実施例で
は圧力スイング窒素吸着装置を用いているが、他の形式
の窒素分離装置を用いることもできる。In each of the above embodiments, nitrogen gas is supplied to the solid fuel storage bin, but the nitrogen gas is also supplied to the solid fuel transport pipe and the solid fuel is transported using the same nitrogen gas. It can also be used for. Furthermore, although a pressure swing nitrogen adsorption device is used in each of the above embodiments, other types of nitrogen separation devices may also be used.
本発明は、次の効果を挙げることができる。 The present invention can have the following effects.
（１）窒素の分離装置により発生した酸素富化ガスを固
体燃料の燃焼用空気の一部として使用することによって
、燃焼用空気量が減少し、燃焼温度の上昇、燃料の燃焼
時間の短縮が実現されると共に未燃損失を減少させるこ
とができる。(1) By using the oxygen-enriched gas generated by the nitrogen separator as part of the solid fuel combustion air, the amount of combustion air is reduced, the combustion temperature increases, and the fuel combustion time is shortened. At the same time, unburned losses can be reduced.
（２）一方、窒素の分離装置により、発生した窒素ガス
を固体燃料の加圧、搬送、貯蔵用の不活性ガスとして使
用することによって、安全性を高めることができる。(2) On the other hand, safety can be improved by using the nitrogen gas generated by the nitrogen separation device as an inert gas for pressurizing, transporting, and storing solid fuel.
（３）窒素ガス及び酸素富化ガスは、窒素の分離装置に
よって安価に得られると共に、生成されたガスは上記の
ように直ちに消費されその取扱いに当って特別な安全上
の配慮をする必要がない。(3) Nitrogen gas and oxygen-enriched gas can be obtained at low cost using nitrogen separation equipment, and the gases produced are immediately consumed as mentioned above, so special safety considerations must be taken when handling them. do not have.
第１図は本発明の第一の実施例の系統図、第２図は同実
施例に用いられる圧力スイング窒素吸着装置の説明図、
第３図及び第４図は、それぞれ本発明の第二及び第三の
実施例の系統図である。
１・・・圧力スイング窒素吸着装置。
２．５・・・送風機、 ３・・・酸素富化ガスの供給
管。
４・・・炉、 ６・・・窒素ガスの供給管。
７・・・固体燃料貯蔵ビン
８・・・固体燃料、ＩＯ・・・１次空気送風機。
１２・・・燃料の供給管、１３・・・燃焼用空気管。
１４・・・送風機、２４・・・吸着塔。
２５・・・窒素吸着剤。Fig. 1 is a system diagram of the first embodiment of the present invention, Fig. 2 is an explanatory diagram of the pressure swing nitrogen adsorption device used in the same embodiment,
3 and 4 are system diagrams of second and third embodiments of the present invention, respectively. 1...Pressure swing nitrogen adsorption device. 2.5...Blower, 3...Oxygen enriched gas supply pipe. 4...Furnace, 6...Nitrogen gas supply pipe. 7...Solid fuel storage bin 8...Solid fuel, IO...Primary air blower. 12...Fuel supply pipe, 13...Combustion air pipe. 14...Blower, 24...Adsorption tower. 25...Nitrogen adsorbent.
Claims (1)
窒素ガスを固体燃料の加圧、搬送又は貯蔵設備へ供給す
る供給管、及び上記分離装置で窒素が分離され酸素が富
化された残存ガスを上記固体燃料を燃焼させる炉へ供給
する供給管を備えたことを特徴とする固体燃料の酸素富
化燃焼装置。A device for separating nitrogen from the air, a supply pipe that supplies the nitrogen gas separated by the separation device to solid fuel pressurization, transportation, or storage equipment, and a residual gas enriched with oxygen after nitrogen has been separated by the separation device. A solid fuel oxygen-enriching combustion apparatus characterized by comprising a supply pipe for supplying gas to a furnace for burning the solid fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096391A JPH02275214A (en) | 1989-04-18 | 1989-04-18 | Oxygen enriched combustion device of solid fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1096391A JPH02275214A (en) | 1989-04-18 | 1989-04-18 | Oxygen enriched combustion device of solid fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02275214A true JPH02275214A (en) | 1990-11-09 |
Family
ID=14163663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1096391A Pending JPH02275214A (en) | 1989-04-18 | 1989-04-18 | Oxygen enriched combustion device of solid fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02275214A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924115A (en) * | 1982-08-02 | 1984-02-07 | Nippon Furnace Kogyo Kaisha Ltd | Combustion of powdered coal |
| JPS6358007A (en) * | 1986-08-27 | 1988-03-12 | Kawasaki Heavy Ind Ltd | Pulverized coal firing boiler |
-
1989
- 1989-04-18 JP JP1096391A patent/JPH02275214A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5924115A (en) * | 1982-08-02 | 1984-02-07 | Nippon Furnace Kogyo Kaisha Ltd | Combustion of powdered coal |
| JPS6358007A (en) * | 1986-08-27 | 1988-03-12 | Kawasaki Heavy Ind Ltd | Pulverized coal firing boiler |
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