JP3468947B2 - Spouted bed coal gasifier - Google Patents
Spouted bed coal gasifierInfo
- Publication number
- JP3468947B2 JP3468947B2 JP28973395A JP28973395A JP3468947B2 JP 3468947 B2 JP3468947 B2 JP 3468947B2 JP 28973395 A JP28973395 A JP 28973395A JP 28973395 A JP28973395 A JP 28973395A JP 3468947 B2 JP3468947 B2 JP 3468947B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- coal
- combustor
- separated
- oxygen
- 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
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
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Landscapes
- Solid-Fuel Combustion (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気をガス化剤と
し、コンバスタとリダクタをもつ二段噴流床ガス化装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-stage spouted bed gasifier using air as a gasifying agent and having a combustor and a reducer.
【０００２】[0002]
【従来の技術】噴流床石炭ガス化装置は石炭ガス化複合
発電のガス化炉の本命として開発されているもので、石
炭をガス化するとともに石炭中灰を溶融・スラグ化し排
出することを特徴としている。噴流床ガス化方式にもガ
ス化剤（酸素，空気）の違い、石炭供給方式（乾式，湿
代）により各種タイプがある。2. Description of the Related Art A spouted bed coal gasifier has been developed as a favorite of a gasification furnace for integrated coal gasification combined cycle power generation, and is characterized by gasifying coal and melting and slagging coal ash and discharging it. I am trying. There are various types of spouted bed gasification systems, depending on the gasifier (oxygen, air) and coal supply system (dry, wet).
【０００３】それらの中で最適の方式は石炭ガス化複合
発電システムとしてプラント効率が高く、且つ、運転性
に優れる観点から選定する必要があるが、プラント効率
の観点からは大容量の酸素プラントを要しない乾式石炭
供給の空気吹きガス化炉が優れている。Among them, the most suitable method is to be selected as a combined coal gasification combined cycle power generation system from the viewpoint of high plant efficiency and excellent operability, but from the viewpoint of plant efficiency, a large capacity oxygen plant is selected. An air-blown gasifier with dry coal supply that is unnecessary is excellent.
【０００４】しかし空気吹きガス化炉の場合、一般に酸
素吹きガス化炉に比較して生成ガス発熱量及びガス温度
が低いため、ガスタービンが要求する数値まで生成ガス
発熱量を高めること、および灰の溶融、排出を容易にす
ることの観点から高温燃焼部（本発明ではコンバスタと
呼ぶ）とガス化反応部（本発明ではリダクタと呼ぶ）を
分離した二段噴流床方式としている。However, in the case of an air-blown gasifier, generally, the calorific value of the generated gas and the gas temperature are lower than those of the oxygen-blown gasifier, so that the calorific value of the generated gas is increased to the values required by the gas turbine, and ash From the viewpoint of facilitating the melting and discharging of the above, a two-stage jet bed system is used in which a high temperature combustion section (called a combustor in the present invention) and a gasification reaction section (called a reductor in the present invention) are separated.
【０００５】この二段噴流床方式を図６、その運転原理
を示す化学平衡図を図７に示す。図６において、０１は
コンバスタ、０２はリダクタ、０３はサイクロン、０４
は水チャンバで、供給石炭及びガス化剤の空気はコンバ
スタ０１とリダクタ０２に分割供給され、また、ガス化
炉で発生する未反応チャーはサイクロン０３で捕集さ
れ、コンバスタ０１に循環供給される。FIG. 6 shows this two-stage jet bed system, and FIG. 7 shows a chemical equilibrium diagram showing its operating principle. In FIG. 6, 01 is a combustor, 02 is a reductor, 03 is a cyclone, and 04.
Is a water chamber, the supplied coal and the air of the gasifying agent are dividedly supplied to the combustor 01 and the reductor 02, and unreacted char generated in the gasification furnace is collected by the cyclone 03 and circulated and supplied to the combustor 01. .
【０００６】ただし、未反応チャーは熱損失を少なくす
るため、極力高温の状態で供給するので、系統機器配管
内での酸化、昇温、燃焼を防止するよう再循環ガス（Ｇ
Ｒ：生成ガスを精製したもの）で搬送する。However, the unreacted char is supplied at a temperature as high as possible in order to reduce the heat loss, so that the recirculation gas (G
R: purified product gas).
【０００７】一方、図７のガス化反応状態図で示すよう
にガスタービンの燃料としての生成ガス発熱量１０００
kcal/Nm3を確保するためには、ガス化炉空気比を０．５
以下にする必要があるが、理論断熱ガス温度は１４００
℃以下となり、石炭中灰を安定に溶融排出するガス温度
ではない。On the other hand, as shown in the gasification reaction state diagram of FIG. 7, the calorific value of generated gas 1000 as fuel of the gas turbine is 1000.
To secure kcal / Nm 3 , the gasifier air ratio should be 0.5.
The theoretical adiabatic gas temperature is 1400
The temperature is below ℃, and it is not the gas temperature to stably melt and discharge ash in coal.
【０００８】このため、二段噴流床方式では、図６に示
すシステムによりリダクタ石炭供給ガスを極少、すなわ
ち図７では０．２以下の空気比とし、コンバスタでは多
量の空気により０．６〜０．８の空気比で高温燃焼を実
施し全体として０．５の空気比以下のガス化を達成する
ものである。Therefore, in the two-stage spouted bed system, the system shown in FIG. 6 minimizes the reductor coal supply gas, that is, the air ratio is 0.2 or less in FIG. 7, and the combustor uses 0.6 to 0 due to a large amount of air. High temperature combustion is performed with an air ratio of 0.8, and gasification with an air ratio of 0.5 or less is achieved as a whole.
【０００９】[0009]
【発明が解決しようとする課題】空気吹き二段噴流床ガ
ス化炉は、空気をガス化剤としたガス化方式ではある
が、その性能および安定運転性を確保するためには次の
条件が必要である。The air-blown two-stage spouted bed gasification furnace is a gasification system using air as a gasifying agent, but the following conditions are required to ensure its performance and stable operability. is necessary.
【００１０】すなわち、生成ガス発熱量をガスタービ
ン燃焼で要求される１０００kcal/Nm3以上を確保するた
め、ガス化炉空気比０．５以下とする。上記の条件
下で、コンバスタでの灰の溶融、排出が可能な高温燃焼
（一般には石炭灰融点＋２００〜２５０℃）を実施す
る。That is, in order to secure the generated gas calorific value of 1000 kcal / Nm 3 or more required for gas turbine combustion, the gasification furnace air ratio is set to 0.5 or less. Under the above conditions, high temperature combustion (generally coal ash melting point + 200 to 250 ° C) that enables melting and discharging of ash in a combustor is carried out.
【００１１】一般に石炭灰の融点は炭種により１１００
〜１７００℃と広範囲にわたっており、これらの炭種に
対応できるためには、コンバスタ内ガス温度は最高１９
００〜２０００℃を達成する必要がなる。しかし、図７
に示す化学平衡図で判るようにガス化炉空気比０．５以
下の場合、コンバスタの空気比は０．８以下でありコン
バスタ炉壁での吸熱を考慮すると、上記ガス温度を達成
できない。Generally, the melting point of coal ash is 1,100 depending on the type of coal.
The gas temperature inside the combustor is up to 19 in order to cover a wide range of ~ 1700 ° C.
It is necessary to achieve the temperature of 00 to 2000 ° C. However, FIG.
As can be seen from the chemical equilibrium diagram shown in Fig. 2, when the gasification furnace air ratio is 0.5 or less, the air ratio of the combustor is 0.8 or less, and the above gas temperature cannot be achieved in consideration of the heat absorption at the wall of the combustor furnace.
【００１２】逆にこのコンバスタ温度を達成するために
はコンバスタ空気比を相対的に高くする必要があり、結
果的にガス化炉空気比が高くなり、例えば０．５以上と
なり、生成ガス発熱量が低くなる欠点がある。このよう
に空気吹き二段噴流床ガス化炉では、，を満足する
よう運転する必要があるが、前述のように灰融点が高い
石炭では運転裕度が狭いという欠点がある。On the contrary, in order to achieve this combustor temperature, it is necessary to make the combustor air ratio relatively high. As a result, the gasifier air ratio becomes high, for example, 0.5 or more, and the calorific value of the produced gas is increased. Has the drawback of being low. As described above, in the air-blown two-stage jet bed gasification furnace, it is necessary to operate so as to satisfy the following conditions. However, as described above, coal having a high ash melting point has a drawback that the operating margin is narrow.
【００１３】本発明は、空気をガス化剤とし、コンバス
タとリダクタを分離した二段噴流床ガス化炉で、かつ、
空気を酸素と窒素に分離する装置を併設した噴流床石炭
ガス化装置において、コンバスタでの高温燃焼を実施し
ながら全体として空気比０．５以下のガス化を達成させ
ることのできるようにした石炭ガス化装置を提供するこ
とを課題としている。The present invention is a two-stage jet bed gasification furnace in which air is used as a gasifying agent and a combustor and a reducer are separated, and
In a spouted bed coal gasifier equipped with a device for separating air into oxygen and nitrogen, coal that can achieve gasification with an air ratio of 0.5 or less as a whole while performing high temperature combustion in a combustor An object is to provide a gasifier.
【００１４】[0014]
【課題を解決するための手段】本発明は、前記課題を解
決するため、ガス化剤である空気の一部を酸素と窒素に
分離し、分離した窒素はガス化炉のリダクタ供給石炭お
よびガス化炉から排出される未反応チャーの搬送ガスと
して使用し、分離した酸素はコンバスタに供給するよう
に構成した噴流床石炭ガス化装置を提供する。In order to solve the above problems, the present invention separates a part of air which is a gasifying agent into oxygen and nitrogen, and the separated nitrogen is coal and gas supplied to a reducer of a gasification furnace. A jet bed coal gasifier is provided which is used as a carrier gas for unreacted char discharged from a gasification furnace and is configured to supply separated oxygen to a combustor.
【００１５】本発明による石炭ガス化装置において、酸
素と窒素に分離するガス化剤空気の割合は１０〜２０％
である。本発明の噴流床石炭ガス化装置においては、空
気分離装置でガス化剤空気の１０〜２０％から得られた
分離酸素はコンバスタにガス化剤として供給されコンバ
スタ供給空気の酸素濃度を高め、その燃焼温度を灰の溶
融・排出を容易にする温度まで高める作用をする。しか
も、ガス化炉全体での空気比は０．５以下に抑え、生成
ガスの発熱量を確保できる。In the coal gasifier according to the present invention, the ratio of gasifying agent air separated into oxygen and nitrogen is 10 to 20%.
Is. In the spouted bed coal gasifier of the present invention, separated oxygen obtained from 10 to 20% of the gasifier air in the air separator is supplied to the combustor as the gasifier to increase the oxygen concentration of the combustor supply air. It acts to raise the combustion temperature to a temperature that facilitates melting and discharging of ash. Moreover, the air ratio in the entire gasification furnace is suppressed to 0.5 or less, and the calorific value of the generated gas can be secured.
【００１６】また、分離窒素ガスは、リダクタ供給石炭
と未反応チャーの搬送ガスとして使われるので、石炭ガ
ス化炉石炭及びチャー供給設備の簡素化と高温空気下で
の石炭チャーの自然酸化昇温防止の安全性を確保でき
る。Further, since the separated nitrogen gas is used as a carrier gas for the coal supplied to the reductor and the unreacted char, the coal gasification furnace simplifies the coal and the char supply equipment and raises the natural oxidation temperature of the coal char under high temperature air. The safety of prevention can be secured.
【００１７】また、本発明の石炭ガス化装置において
は、ガス化剤である空気の一部、即ちその１０〜２０％
を酸素と窒素に分離、運用することによって、図５に示
すように石炭ガス化複合発電プラントと組合せた場合、
最もプラント効率が高い。Further, in the coal gasifier of the present invention, a part of air which is a gasifying agent, that is, 10 to 20% thereof.
When combined with an integrated coal gasification combined cycle power plant as shown in FIG.
Highest plant efficiency.
【００１８】更に、他の本発明による噴流床石炭ガス化
装置では、前記したようにガス化剤である空気を分離し
て得られた窒素ガスを加圧状態のガス化装置に必要なパ
ージ、シール用ガスとして用い、窒素分離後の酸素はコ
ンバスタに供給する。従って、この場合も、ガス化装置
全体で所定のガス化炉空気量は保ちつつ、コンバスタの
酸素濃度を高め高温燃焼を達成できる。Furthermore, in the jet bed coal gasifier according to another embodiment of the present invention, the nitrogen gas obtained by separating the air which is the gasifying agent is purged as necessary for the gasifier under pressure, It is used as a sealing gas, and oxygen after nitrogen separation is supplied to the combustor. Therefore, also in this case, it is possible to increase the oxygen concentration of the combustor and achieve high temperature combustion while maintaining a predetermined gasification furnace air amount in the entire gasification device.
【００１９】更にまた、本発明による噴流床石炭ガス化
装置では、空気分離装置でガス化剤である空気の一部か
ら分離した窒素をガス化炉のリダクタ供給石炭と未反応
チャーの搬送ガスとして使うと共に、ガス化装置のパー
ジ、シール用ガスの両方に使用するように構成してもよ
い。Furthermore, in the spouted bed coal gasifier according to the present invention, the nitrogen separated from a part of the air which is the gasifying agent in the air separator is used as the carrier gas for the reducer-supplied coal and unreacted char of the gasifier. In addition to being used, the gasifier may be configured to be used for both purging and sealing gas.
【００２０】このようにして本発明の噴流床石炭ガス化
装置によれば空気をガス化剤とし、コンバスタとリダク
タを分離した二段噴流床ガス化炉で、かつ、空気を酸素
と窒素に分離する装置を併設した噴流床石炭ガス化装置
において、コンバスタでの高温燃焼を実施しながらも、
全体として空気比０．５以下のガス化を達成させて所要
の発熱量をもつ石炭ガス化ガスを生成させることができ
る。Thus, according to the jet bed coal gasification apparatus of the present invention, air is used as the gasifying agent, and the two-stage jet bed gasification furnace in which the combustor and the reducer are separated and the air is separated into oxygen and nitrogen. In a spouted bed coal gasifier equipped with a device to operate, while performing high temperature combustion in the combustor,
As a whole, it is possible to achieve gasification with an air ratio of 0.5 or less and generate coal gasification gas having a required calorific value.
【００２１】[0021]
【発明の実施の形態】以下、本発明による噴流床石炭ガ
ス化装置について図１〜図４に示した実施の形態に基づ
いて具体的に説明する。なお、以下の実施の形態におい
て、各図面で共通する構成の部分には説明を簡単にする
ため同じ符号を付してある。BEST MODE FOR CARRYING OUT THE INVENTION A spouted bed coal gasification apparatus according to the present invention will be specifically described below based on the embodiments shown in FIGS. In addition, in the following embodiments, the same reference numerals are given to the portions having the same configuration in each drawing for simplification of description.
【００２２】（実施の第１形態）まず、図１及び図２に
より実施の第１形態について説明する。図１において１
１はコンバスタ、１２はリダクタ、１３はサイクロン、
１４は溶融スラグを受ける水チャンバ、１５は空気分離
装置を示す。ガス化剤の空気はその一部が空気分離装置
１５に導入されて窒素Ｎ2 と酸素Ｏ2に分離され、窒素
Ｎ2 はリダクタ石炭とチャーの搬送ガスに供され、酸素
Ｏ2 はコンバスタ石炭のガス化剤として供給される。(First Embodiment) First, the first embodiment will be described with reference to FIGS. 1 and 2. 1 in FIG.
1 is a combustor, 12 is a reductor, 13 is a cyclone,
Reference numeral 14 is a water chamber for receiving the molten slag, and 15 is an air separation device. A part of the gasifying agent air is introduced into the air separation device 15 to be separated into nitrogen N 2 and oxygen O 2 , the nitrogen N 2 is supplied to the carrier gas of the reductor coal and char, and the oxygen O 2 is combustor coal. Is supplied as a gasifying agent.
【００２３】本システムによる運転例をガス化炉空気比
０．５、リダクタ石炭及びチャー搬送ガスに必要な窒素
を得るため空気を分離したケースについて以下説明す
る。図２において、実線は空気をガス化剤とした場合に
おける化学平衡状態を、破線は酸素富化空気をガス化剤
とした場合における断熱平衡ガス温度を示す。ガス化炉
空気比０．５の通常運転、すなわち、リダクタ石炭とコ
ンバスタ石炭供給量比を１とし、リダクタ石炭搬送ガス
を全ガス化剤（空気）の１５％とした場合のコンバスタ
空気比は図２に示す矢印のように０．８５となる（但し
チャー搬送ガスにより若干低めとなる）。An example of operation by this system will be described below in the case where air is separated to obtain nitrogen required for the gasifier air ratio of 0.5, the reductor coal and the char carrier gas. In FIG. 2, the solid line shows the chemical equilibrium state when air is used as the gasifying agent, and the broken line shows the adiabatic equilibrium gas temperature when oxygen-enriched air is used as the gasifying agent. Normal operation with gasifier air ratio of 0.5, that is, the combustor air ratio when the reductor coal and combustor coal supply ratio is 1 and the reductor coal carrier gas is 15% of the total gasifying agent (air) It becomes 0.85 as shown by the arrow shown in 2 (however, it becomes slightly lower due to the char carrier gas).
【００２４】本実施形態で、リダクタ石炭およびチャー
の搬送に必要なガスを全ガス化剤の３０％（リダクタ石
炭用１５％，チャー搬送用１５％）を空気分離して供給
すると、コンバスタ空気比は１．０理論燃焼をしている
ことになる。これによりガス化炉全体としてはガス化炉
空気比０．５を維持しつつコンバスタ空気比は高くでき
るため、コンバスタ温度を高く保持できることになる。In the present embodiment, when the gas required for carrying the reductor coal and char is separated from the gas by 30% of the total gasifying agent (15% for the reductor coal and 15% for the char carrying), the combustor air ratio is increased. Means 1.0 theoretical combustion. As a result, the gasification furnace as a whole can maintain the gasification furnace air ratio of 0.5 while increasing the combustor air ratio, so that the combustor temperature can be maintained high.
【００２５】これは言い換えれば、ガス化剤の空気を１
部分離して得た酸素として供給することにより、コンバ
スタは酸素濃度の高い（本実施形態では酸素濃度２７wt
％）空気で燃焼させていることになる。すなわち、通常
運転に比較してコンバスタ温度を高くできるため、高灰
融点炭にも対応できる。In other words, the gasification agent of air is 1
By supplying as oxygen obtained by partial separation, the combustor has a high oxygen concentration (in this embodiment, the oxygen concentration is 27 wt.
%) It means that it is burned with air. That is, since the combustor temperature can be increased as compared with the normal operation, it can be applied to high ash melting point coal.
【００２６】（実施の第２形態）次に、実施の第２形態
について図３，図４により説明する。先の実施の第１形
態においては、ガス化に必要なガス化剤（空気）の一部
を窒素と酸素に分離し、分離した窒素ガスＮ2 をリダク
タ石炭及びチャーの搬送ガスとし、酸素ガスＯ2 をコン
バスタに供給し高空気比燃焼を達成した。(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. In the first embodiment described above, a part of the gasifying agent (air) necessary for gasification is separated into nitrogen and oxygen, and the separated nitrogen gas N 2 is used as a carrier gas for the reductor coal and char, and oxygen gas is used. O 2 was supplied to the combustor to achieve high air ratio combustion.
【００２７】本実施の第２形態ではリダクタ石炭及びチ
ャーの搬送ガスとしての窒素ガスＮ 2 の他、加圧状態に
あるガス化設備に必要なパージガス、シールガスとして
の窒素ガスＮ2 を含めて空気分離装置で分離製造し、分
離後の残存酸素をガス化剤としてコンバスタに供給し、
コンバスタに投入する空気を更に減らすことにより、結
果としてコンバスタで高酸素濃度空気による燃焼を達成
するものである。In the second embodiment of the present invention, the reductor coal and chi
Gas N as carrier gas 2In addition to the pressurized state
As purge gas and seal gas required for certain gasification equipment
Nitrogen gas N2Separated by an air separation device including
The residual oxygen after separation is supplied to the combustor as a gasifying agent,
By further reducing the air input to the combustor,
Combustor achieves combustion with high oxygen concentration air
To do.
【００２８】本実施例によるシステムを示す図３におい
て、２１はガス化炉コンバスタ、２２はリダクタ、２３
はサイクロン、２４は溶融スラグを受ける水チャンバ、
２５は空気分離装置を示す。本実施形態ではリダクタ石
炭とチャーの搬送ガス及びパージガス、イナートガスと
して必要な窒素ガスＮ2 を空気分離装置２５によりガス
化剤である空気の一部から分離し、これにより発生した
残存酸素をコンバスタ２１のガス化剤に供給利用し、供
給残存酸素分だけガス化剤空気を低減運転するものであ
る。In FIG. 3 showing the system according to the present embodiment, 21 is a gasifier furnace combustor, 22 is a reducer, and 23.
Is a cyclone, 24 is a water chamber for receiving molten slag,
Reference numeral 25 indicates an air separation device. In this embodiment, the reductor coal and char carrier gas and purge gas, and nitrogen gas N 2 required as an inert gas are separated from a part of the air which is the gasifying agent by the air separation device 25, and the residual oxygen generated by this is separated by the combustor 21. The gasification agent air is supplied and used to reduce the gasification agent air by the amount of residual oxygen supplied.
【００２９】その具体的実施形態として、第１実施形態
の通常運転状態に加え、更にガス化炉設備のイナートガ
ス（窒素）がガス化剤空気の１０％必要であるとし、且
つ、生成ガス流量を第１実施形態の場合の１．１倍とし
た場合の空気および空気を分離した酸素、窒素の数値割
合を図３の（ ）中に数字で示している。その結果、全
体のガス化炉空気量は保ちつつコンバスタ２１は酸素濃
度が３７wt％での更なる高温燃焼（図４中一点破線）が
達成できることになる。As a specific embodiment thereof, in addition to the normal operation state of the first embodiment, it is further assumed that the inert gas (nitrogen) of the gasification furnace equipment needs 10% of the gasifying agent air, and the product gas flow rate is The numerical ratios of air and oxygen and nitrogen separated from the air in the case of 1.1 times the case of the first embodiment are shown by the numbers in () of FIG. As a result, the combustor 21 can achieve further high temperature combustion (dotted line in FIG. 4) at an oxygen concentration of 37 wt% while maintaining the entire gasifier air amount.
【００３０】（第３実施例）この実施の第３形態では、
空気分離装置でガス化剤である空気の一部を窒素と酸素
に分離し、その窒素ガスを石炭ガス化装置に必要なパー
ジ及びシールガスとして使用し、残存酸素によってコン
バスタに送る空気に添加し酸素富化する。この実施の第
３形態においても、コンバスタでの高温燃焼を実現しな
がらも、全体として空気比０．５以下のガス化を行わ
せ、所望の発熱量をもつ石炭ガス化ガスを生成させう
る。(Third Embodiment) In the third embodiment of the present invention,
The air separation device separates a part of the gas, which is the gasifying agent, into nitrogen and oxygen.The nitrogen gas is used as the purge and seal gas required for the coal gasifier, and the residual oxygen is added to the air sent to the combustor. Enrich with oxygen. Also in the third embodiment of the present invention, while realizing high temperature combustion in the combustor, gasification with an air ratio of 0.5 or less can be performed as a whole, and coal gasification gas having a desired heating value can be generated.
【００３１】[0031]
【発明の効果】以上、具体的に説明したように、本発明
による噴流床石炭ガス化装置では、ガス化剤である空気
の１０〜２０％を酸素と窒素に分離し、分離した窒素は
ガス化炉のリダクタ供給石炭およびガス化炉から排出さ
れる未反応チャーの搬送ガスとして使用し、分離した酸
素はコンバスタに供給するように構成しているので次の
効果を奏することができる。As described above in detail, in the spouted bed coal gasifier according to the present invention, 10 to 20% of air which is a gasifying agent is separated into oxygen and nitrogen, and the separated nitrogen is gas. It is used as a carrier gas for the unreacted char discharged from the gasification furnace and the coal supplied to the reductor of the gasification furnace, and the separated oxygen is supplied to the combustor, so that the following effects can be obtained.
【００３２】まず、ガス化剤空気の１０〜２０％からの
分離窒素はリダクタ石炭及びチャーの搬送ガスとして供
給し、分離酸素はコンバスタに供給することにより、生
成ガスの発熱量は保持しつつコンバスタの高温燃焼が達
成できるため、高灰融点の石炭のガス化に有利である。First, the separated nitrogen from 10 to 20% of the gasifying agent air is supplied as a carrier gas for the reductor coal and char, and the separated oxygen is supplied to the combustor so that the calorific value of the produced gas is maintained and the combustor is maintained. Since high temperature combustion can be achieved, it is advantageous for gasification of high ash melting point coal.
【００３３】ガス化剤空気の１０〜２０％を酸素と窒素
に分離、運用するので、石炭ガス化複合発電プラントと
組合せた場合、最もプラント効率が高いものとなる。ま
た、本発明は空気吹きガス化性能改善のほか、石炭ガス
化炉石炭及びチャーの搬送に分離窒素ガスを使うので、
石炭ガス化炉石炭及びチャー供給設備の簡素化、高圧空
気下での石炭チャーの自然酸化昇温防止の安全性を確保
できる。The separation of 10 20% of the gasifying agent air into oxygen and nitrogen, since the operation, when combined with a coal gasification combined cycle power plant, the most that the plant efficiency is high. Further, the present invention, in addition to improving the air-blown gasification performance, uses a separated nitrogen gas for the transportation of coal gasification furnace coal and char,
Coal gasification furnace Coal and char supply equipment can be simplified, and safety can be ensured for preventing natural oxidation temperature rise of coal char under high pressure air.
【００３４】また、本発明による噴流床石炭ガス化装置
において、ガス化剤である空気を分離して得られた窒素
ガスを、加圧状態のガス化装置に必要なパージ、シール
用ガスとして使用し、窒素分離後の酸素をコンバスタに
供給するように構成したものでも高酸素濃度による空気
でガス化を実施することにより、同一ガス化炉空気比で
も従来システムより生成ガス発熱量の上昇及びコンバス
タガス温度の上昇が図れるためガス化炉運転の裕度が広
がる。Further, in the spouted bed coal gasifier according to the present invention, nitrogen gas obtained by separating air as a gasifying agent is used as a gas for purging and sealing required for the gasifier in a pressurized state. However, even if it is configured to supply oxygen after nitrogen separation to the combustor, by performing gasification with air with a high oxygen concentration, the calorific value of generated gas is increased and the combustor is increased compared to the conventional system even with the same gasification furnace air ratio. Since the gas temperature can be increased, the operational margin of the gasification furnace is expanded.
【図１】本発明の実施の第１形態に係る噴流床石炭ガス
化装置の系統構成図。FIG. 1 is a system configuration diagram of a spouted bed coal gasifier according to a first embodiment of the present invention.
【図２】図１に示した噴流床石炭ガス化装置の運転状態
図。FIG. 2 is an operation state diagram of the spouted bed coal gasifier shown in FIG.
【図３】本発明の実施の第２形態に係る噴流床石炭ガス
化装置の系統構成図。FIG. 3 is a system configuration diagram of a spouted bed coal gasifier according to a second embodiment of the present invention.
【図４】図３に示した噴流床石炭ガス化装置の運転状態
図。FIG. 4 is an operation state diagram of the jet bed coal gasifier shown in FIG. 3.
【図５】本発明による噴流床石炭ガス化装置を使用した
場合のプラント効率の向上を示すグラフ。FIG. 5 is a graph showing an improvement in plant efficiency when using a spouted bed coal gasifier according to the present invention.
【図６】従来技術による噴流床石炭ガス化装置の系統構
成図。FIG. 6 is a system configuration diagram of a conventional spouted bed coal gasifier.
【図７】図６に示した噴流床石炭ガス化装置の運転状態
図。7 is an operation state diagram of the spouted bed coal gasifier shown in FIG.
１１，２１ コンバスタ １２，２２ リダクタ １３，２３ サイクロン １４，２４ 水チャンバ １５，２５ 空気分離装置 11,21 combustor 12,22 Reductor 13,23 cyclone 14,24 Water chamber 15,25 Air separation device
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−183992（ＪＰ，Ａ) 特開 平７−41776（ＪＰ，Ａ) 特開 昭59−36195（ＪＰ，Ａ) 実開 昭62−36051（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C10J 3/46 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 63-183992 (JP, A) JP 7-41776 (JP, A) JP 59-36195 (JP, A) Actual development 62- 36051 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) C10J 3/46
Claims (2)
クタとを分離した二段噴流床ガス化炉で、且つ、空気を
酸素と窒素に分離する空気分離装置を併設した噴流床石
炭ガス化装置において、ガス化剤である空気の１０〜２
０％を前記空気分離装置で酸素と窒素に分離し、分離し
た窒素はガス化炉のリダクタ供給石炭及びガス化炉から
排出される未反応チャーの搬送ガスとして使用し、分離
した酸素はコンバスタに供給するように構成したことを
特徴とする噴流床石炭ガス化装置。1. A spouted bed coal gasification apparatus which is a two-stage spouted bed gasification furnace in which air is used as a gasifying agent and a combustor and a reductor are separated from each other, and which is also provided with an air separation device for separating air into oxygen and nitrogen. 10 to 2 of air, which is a gasifying agent,
0% is separated into oxygen and nitrogen by the air separation device, and the separated nitrogen is used as a carrier gas for the coal supplied to the reducer of the gasifier and the unreacted char discharged from the gasifier, and the separated oxygen is used for the combustor. A spouted bed coal gasifier characterized by being configured to supply.
クタとを分離した二段噴流床ガス化炉で、且つ、空気を
酸素と窒素に分離する空気分離装置を併設した噴流床石
炭ガス化装置において、ガス化剤である空気の１０〜２
０％を前記空気分離装置で酸素と窒素に分離し、分離し
た窒素は加圧状態のガス化装置に必要なパージ及びシー
ル用ガスとして使用し、分離した酸素はコンバスタに供
給するように構成したことを特徴とする噴流床石炭ガス
化装置。2. A spouted bed coal gasifier which is a two-stage spouted bed gasification furnace in which air is used as a gasifying agent and a combustor and a reductor are separated from each other, and which is also provided with an air separation device for separating air into oxygen and nitrogen. 10 to 2 of air, which is a gasifying agent,
0% was separated into oxygen and nitrogen by the air separation device, the separated nitrogen was used as a gas for purging and sealing required for the gasifier under pressure, and the separated oxygen was supplied to the combustor. A spouted bed coal gasifier characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28973395A JP3468947B2 (en) | 1995-11-08 | 1995-11-08 | Spouted bed coal gasifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28973395A JP3468947B2 (en) | 1995-11-08 | 1995-11-08 | Spouted bed coal gasifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09132786A JPH09132786A (en) | 1997-05-20 |
| JP3468947B2 true JP3468947B2 (en) | 2003-11-25 |
Family
ID=17747057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28973395A Expired - Lifetime JP3468947B2 (en) | 1995-11-08 | 1995-11-08 | Spouted bed coal gasifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3468947B2 (en) |
-
1995
- 1995-11-08 JP JP28973395A patent/JP3468947B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09132786A (en) | 1997-05-20 |
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