JP2755835B2 - Gasification combustion method - Google Patents
Gasification combustion methodInfo
- Publication number
- JP2755835B2 JP2755835B2 JP4818491A JP4818491A JP2755835B2 JP 2755835 B2 JP2755835 B2 JP 2755835B2 JP 4818491 A JP4818491 A JP 4818491A JP 4818491 A JP4818491 A JP 4818491A JP 2755835 B2 JP2755835 B2 JP 2755835B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- combustion
- supplied
- furnace
- gas
- 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 - Fee Related
Links
- 238000002309 gasification Methods 0.000 title claims description 26
- 238000009841 combustion method Methods 0.000 title claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 32
- 239000000567 combustion gas Substances 0.000 claims description 29
- 239000007789 gas Substances 0.000 claims description 29
- 238000006477 desulfuration reaction Methods 0.000 claims description 27
- 230000023556 desulfurization Effects 0.000 claims description 27
- 239000000446 fuel Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 230000003009 desulfurizing effect Effects 0.000 claims description 17
- 150000003464 sulfur compounds Chemical class 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 12
- 239000000428 dust Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 102220579497 Macrophage scavenger receptor types I and II_F23C_mutation Human genes 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、重質油や石炭等の粗悪
燃料を、例えばガスタービンを用いるコンバインドサイ
クル等の作動燃料とするために、ガス化するガス化燃焼
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasification combustion method for gasifying inferior fuel such as heavy oil or coal as working fuel for a combined cycle using a gas turbine, for example.
【0002】[0002]
【従来の技術】図3は、従来のガス化燃焼方法を実施す
る装置の一例を示す系統図である。2. Description of the Related Art FIG. 3 is a system diagram showing an example of an apparatus for performing a conventional gasification combustion method.
【0003】まず、石炭(11)と脱硫剤(12)とガス化
用空気(71)が流動床ガス化炉(10)に供給される。こ
の流動床ガス化炉(10)では、石炭(11)がガス化さ
れ、石炭中の硫黄分が脱硫剤(12)により硫化カルシウ
ム(CaS )として固定される。石炭(11)のガス化によ
って生じた可燃ガス(13)は、脱塵装置(20)で脱塵さ
れる。脱塵後の可燃ガス(21)は二次コンバスタ(60)
に導入される。[0003] First, coal (11), a desulfurizing agent (12), and gasification air (71) are supplied to a fluidized-bed gasification furnace (10). In the fluidized bed gasifier (10), the coal (11) is gasified, and the sulfur content in the coal is fixed as calcium sulfide (CaS) by the desulfurizing agent (12). The combustible gas (13) generated by gasification of the coal (11) is removed by a dust removal device (20). Combustible gas after dust removal (21) is a secondary combustor (60)
Will be introduced.
【0004】一方、流動床ガス化炉(10)でガス化され
ずに石炭(11)から生じたチャーと脱硫後の脱硫剤の混
合物(14)、および脱塵装置(20)で回収されたチャー
と脱硫剤の混合物(22)は、流動床燃焼炉(30)に供給
される。この流動床燃焼炉(30)には空気(72)も供給
され、ここでチャーの燃焼反応と硫化カルシウムCaSが
酸化して石膏(CaSO4 )に転換する反応が起きる。ま
た、流動床燃焼炉(30)の流動床内には熱交換器(40)
が設置されていて、スチームまたは水(41)で冷却する
ことにより、流動床温度が調整される。[0004] On the other hand, a mixture (14) of a char generated from coal (11) without desulfurization and a desulfurizing agent after desulfurization without being gasified in a fluidized bed gasifier (10), and collected by a dust removal device (20). The mixture of char and desulfurizing agent (22) is fed to a fluidized bed combustion furnace (30). Air (72) is also supplied to the fluidized bed combustion furnace (30), where a char combustion reaction and a reaction in which calcium sulfide CaS is oxidized and converted into gypsum (CaSO 4 ) occur. In the fluidized bed of the fluidized bed combustion furnace (30), a heat exchanger (40)
Is installed, and the fluidized bed temperature is adjusted by cooling with steam or water (41).
【0005】流動床燃焼炉(30)で発生する燃焼ガス
(31)は、脱塵装置(50)により脱塵される。脱塵後の
燃焼ガス(51)は、前記二次コンバスタ(60)に導入さ
れる。二次コンバスタ(60)では、流動床ガス化炉(1
0)から導かれた可燃ガス(21)が、流動床燃焼炉(3
0)から導かれた燃焼ガス(51)中の残存酸素により燃
焼し、その燃焼ガス(61)は例えばガスタービン(図示
せず。)に送られる。[0005] The combustion gas (31) generated in the fluidized bed combustion furnace (30) is removed by a dust removal device (50). The combustion gas (51) after dust removal is introduced into the secondary combustor (60). In the secondary combustor (60), the fluidized bed gasifier (1
Combustible gas (21) derived from (0)
Combustion is carried out by the residual oxygen in the combustion gas (51) derived from 0), and the combustion gas (61) is sent to, for example, a gas turbine (not shown).
【0006】石炭(11)中の灰分および脱硫後の脱硫剤
(12)は、流動床燃焼炉(30)の炉底から抜き出し灰
(32)として、また脱塵装置(50)から排出灰(52)と
して、それぞれ系外に除去される。The ash content in the coal (11) and the desulfurizing agent (12) after desulfurization are withdrawn from the bottom of the fluidized bed combustion furnace (30) as ash (32) and discharged from the dust removal device (50). 52), each is removed outside the system.
【0007】二次コンバスタ(61)から出てゆく燃焼ガ
ス(61)の量を増大させる場合には、流動床ガス化炉
(10)に供給する石炭(11)と空気(71)の量を増加さ
せる。そうすると、流動床ガス化炉(10)から流動床燃
焼炉(30)へ移送されるチャーと脱硫剤の混合物(14)
が増加する。そこで、流動床燃焼炉(30)へ入るチャー
と脱硫剤の混合物(14)の増加量に応じて、空気(72)
の供給量を増加する。逆に燃焼ガス(61)の量を減少さ
せる場合には、流動床ガス化炉(10)に供給する石炭
(11)と空気(71)を減少させ、その後流動床ガス化炉
(10)から排出されるチャー等(14)の減少量に応じ
て、流動床燃焼炉(30)に供給する空気(72)の量を減
少させる。When increasing the amount of the combustion gas (61) exiting from the secondary combustor (61), the amounts of the coal (11) and the air (71) supplied to the fluidized bed gasifier (10) are increased. increase. Then, a mixture of char and desulfurizing agent (14) transferred from the fluidized bed gasifier (10) to the fluidized bed combustion furnace (30)
Increase. Therefore, as the mixture of char and desulfurizing agent (14) entering the fluidized bed combustion furnace (30) increases, the air (72)
Increase the supply of Conversely, when reducing the amount of combustion gas (61), the amount of coal (11) and air (71) supplied to the fluidized bed gasifier (10) is reduced, and then the fluidized bed gasifier (10) The amount of air (72) supplied to the fluidized bed combustion furnace (30) is reduced according to the amount of the discharged char and the like (14).
【0008】[0008]
【発明が解決しようとする課題】前記従来のガス化燃焼
方法には、次のような解決すべき課題があった。 1)従来の方法では、重質油や石炭等の粗悪燃料をガス
化する反応と燃料中の硫黄分を除く脱硫反応とを、同一
の流動床ガス化炉(10)内で行なっていたので、充分満
足できる脱硫性能が得られなかった。 2)従来の方法では、流動床燃焼炉(30)内に燃焼温度
制御用の熱交換器(40)が設置されているので、燃料が
持つエネルギの一部分は、燃焼ガス(61)の顕熱として
ガスタービンに送られることなく、直接蒸気タービンで
回収される。したがって、ガスタービンを利用しない分
だけ発電効率が低いという問題があった。 3)ガスタービンの負荷を調整する時には、燃焼ガス
(61)の量を変化させる必要があるが、従来の方法では
その燃焼ガス(61)量の変動速度が遅かった。すなわ
ち、燃焼ガス(61)の量を増減させる場合、まず流動床
ガス化炉(10)に供給する石炭(11)と空気(71)の量
を増減させ、その後、流動床ガス化炉(10)から流動床
燃焼炉(30)へ移送されるチャーと脱硫剤の混合物(1
4)の増減に応じて、流動床燃焼炉(30)に供給する空
気(72)の量を調整するので、燃焼ガス(61)の量が変
動する速度は非常に遅かった。 4)燃焼ガス(61)の温度を一定に保持して燃焼ガス
(61)量を変化させる場合は、従来は全体の燃焼用空気
(70)量と供給石炭(11)量を調整して、しかも流動床
ガス化炉(10)・流動床燃焼炉(30)間のチャー等(1
4)の移送量の変動を、各反応炉に供給する空気(7
1),(72)の分配割合で調整することになるので、各
反応炉(10),(30)の制御が非常に複雑であった。The conventional gasification combustion method has the following problems to be solved. 1) In the conventional method, the reaction for gasifying a bad fuel such as heavy oil or coal and the desulfurization reaction for removing the sulfur content in the fuel are performed in the same fluidized-bed gasifier (10). Sufficient desulfurization performance could not be obtained. 2) In the conventional method, since the heat exchanger (40) for controlling the combustion temperature is installed in the fluidized-bed combustion furnace (30), a part of the energy of the fuel is sensible heat of the combustion gas (61). Without being sent to the gas turbine, and directly collected by the steam turbine. Therefore, there is a problem that the power generation efficiency is low because the gas turbine is not used. 3) When adjusting the load of the gas turbine, it is necessary to change the amount of the combustion gas (61), but in the conventional method, the fluctuation speed of the amount of the combustion gas (61) is slow. That is, when increasing or decreasing the amount of the combustion gas (61), first, the amounts of the coal (11) and the air (71) supplied to the fluidized-bed gasifier (10) are increased or decreased. ) And a mixture of char and desulfurizer (1)
Since the amount of air (72) supplied to the fluidized bed combustion furnace (30) was adjusted according to the increase or decrease in 4), the speed at which the amount of combustion gas (61) fluctuated was very slow. 4) When changing the amount of the combustion gas (61) while keeping the temperature of the combustion gas (61) constant, conventionally, the total amount of the combustion air (70) and the supplied coal (11) are adjusted. In addition, the char between the fluidized bed gasifier (10) and the fluidized bed furnace (30)
The change in the transfer amount in 4) is compared with the air (7
Since the adjustment is performed with the distribution ratio of 1) and (72), the control of each reactor (10) and (30) is very complicated.
【0009】[0009]
【課題を解決するための手段】本発明は、前記従来の課
題を解決するために、燃料と空気とを流動床ガス化炉に
供給して上記燃料の一部をガス化し、生じた可燃ガスと
脱硫剤とを流動床脱硫炉に供給して、上記可燃ガスを脱
硫した後、二次コンバスタへ導くとともに、上記流動床
ガス化炉でガス化しなかった残りの燃料および上記流動
床脱硫炉で生じた硫黄化合物と残りの脱硫剤を流動床燃
焼炉に導いて、別途供給する燃料とともに別途供給する
空気により燃焼させ、生じた燃焼ガスを更に上記二次コ
ンバスタに導いて、別途供給する空気とともに上記可燃
ガスを燃焼させること特徴とするガス化燃焼方法を提案
するものである。According to the present invention, in order to solve the above-mentioned conventional problems, a fuel and air are supplied to a fluidized-bed gasifier to gasify a part of the fuel and produce a combustible gas. And a desulfurizing agent are supplied to a fluidized bed desulfurization furnace to desulfurize the combustible gas and then to a secondary combustor, and the remaining fuel not gasified by the fluidized bed gasifier and the fluidized bed desulfurization furnace The resulting sulfur compound and the remaining desulfurizing agent are guided to a fluidized bed combustion furnace and burned with separately supplied fuel and separately supplied air, and the generated combustion gas is further guided to the secondary combustor and separately supplied air. The present invention proposes a gasification combustion method characterized by burning the combustible gas.
【0010】[0010]
【作用】本発明の方法においては、燃料のガス化反応と
脱硫反応が同一流動床内で行なわれず、分離された別個
の炉内で行なわれるので、脱硫性能が著しく向上する。In the method of the present invention, the gasification reaction and the desulfurization reaction of the fuel are not carried out in the same fluidized bed but in separate furnaces, so that the desulfurization performance is remarkably improved.
【0011】本発明方法ではまた、流動床ガス化炉だけ
ではなく、流動床ガス化炉で燃焼しなかった残りの燃料
を燃焼する流動床燃焼炉にも、燃料を供給するととも
に、二次コンバスタにも燃焼用空気を直接供給するの
で、負荷の変動に応じて、二次コンバスタ出口の燃焼ガ
ス量を急速に増減させることができる。In the method of the present invention, the fuel is supplied not only to the fluidized bed gasifier but also to the fluidized bed combustor for burning the remaining fuel not burned in the fluidized bed gasifier, and the secondary combustor is supplied. Since the combustion air is also supplied directly to the fuel cell, the amount of combustion gas at the outlet of the secondary combustor can be rapidly increased or decreased in accordance with a change in load.
【0012】[0012]
【実施例】図1は本発明方法の一実施例に使用される装
置を示す系統図である。FIG. 1 is a system diagram showing an apparatus used in an embodiment of the method of the present invention.
【0013】本実施例の方法においては、まず石炭(11
a)とガス化用空気(71)が流動床ガス化炉(80)に供
給される。この流動床ガス化炉(80)内で、石炭(11
a)の一部がガス化される。このガス化ガス(81) は流
動床脱硫炉(90)の下部に供給される。ここで別途供給
される脱硫剤(12)により、ガス化ガス(81)中の硫黄
分は、硫化カルシウム(CaS )として固定される。脱硫
後の可燃ガス(13)は、脱塵装置(20)で脱塵され、ク
リーンな可燃ガス(21)として二次コンバスタ(60)に
導かれる。In the method of this embodiment, first, coal (11
a) and gasification air (71) are supplied to a fluidized bed gasification furnace (80). In this fluidized bed gasifier (80), coal (11
Part of a) is gasified. This gasification gas (81) is supplied to the lower part of the fluidized bed desulfurization furnace (90). Here, the sulfur content in the gasification gas (81) is fixed as calcium sulfide (CaS) by the desulfurizing agent (12) separately supplied. The combustible gas (13) after desulfurization is dust-removed by the dust remover (20) and guided to the secondary combustor (60) as a clean combustible gas (21).
【0014】一方、流動床ガス化炉(80)でガス化され
ずに石炭から生じたチャー(82)、流動床脱硫炉(90)
から排出される脱硫剤と硫化カルシウムの混合物(9
1)、および脱塵装置(20)で回収した脱硫剤と硫化カ
ルシウムの混合物(22)は、流動床燃焼炉(30)に供給
され、別途供給される空気(72)により燃焼する。ここ
で発生した燃焼ガス(31)は、脱塵装置(50)で脱塵さ
れ、クリーンな燃焼ガス(51)として前記二次コンバス
タ(60)に導かれる。流動床燃焼炉(30)には、急速に
負荷を増大させる時のために、燃焼供給ライン(11b)
が設けられている。On the other hand, a char (82) produced from coal without being gasified in a fluidized bed gasifier (80), a fluidized bed desulfurizer (90)
Mixture of desulfurizing agent and calcium sulfide (9
1) and the mixture (22) of the desulfurizing agent and calcium sulfide recovered by the dust removal device (20) are supplied to a fluidized bed combustion furnace (30) and burned by air (72) separately supplied. The combustion gas (31) generated here is dedusted by the dedusting device (50) and guided to the secondary combustor (60) as a clean combustion gas (51). The fluidized bed combustion furnace (30) has a combustion supply line (11b) for rapid load increase.
Is provided.
【0015】二次コンバスタ(60)では、燃焼ガス(5
1)中の残存酸素と別途供給される空気(73)によっ
て、可燃ガス(21)が燃焼する。そして生じた燃焼ガス
(61)は、例えばガスタービン(図示せず。)に供給さ
れ、高効率の発電が行なわれる。In the secondary combustor (60), the combustion gas (5
The combustible gas (21) is combusted by the residual oxygen in 1) and the air (73) separately supplied. The generated combustion gas (61) is supplied to, for example, a gas turbine (not shown), and high-efficiency power generation is performed.
【0016】流動床燃焼炉(30)内の酸化反応で硫化カ
ルシウムから転換した石膏(CaSO4 )と灰分の混合物
(32)および脱塵装置(50)で回収された石膏と灰分の
混合物(52)は系外に排出される。A mixture (32) of gypsum (CaSO 4 ) and ash converted from calcium sulfide by an oxidation reaction in a fluidized bed combustion furnace (30) and a mixture (52) of gypsum and ash recovered in a dust removing device (50) ) Is discharged out of the system.
【0017】流動床ガス化炉(10)、流動床燃焼炉(3
0)および二次コンバスタ(60)にガス化用または燃焼
用として供給される空気(71),(72),(73)は、負
荷変化制御時の調整用として、それぞれ独立に供給でき
るようになっている。Fluidized bed gasifier (10), fluidized bed combustion furnace (3
The air (71), (72), and (73) supplied for gasification or combustion to the secondary combustor (60) and the secondary combustor (60) can be supplied independently for adjustment during load change control. Has become.
【0018】なお、流動床脱硫炉(90)の構造は、従来
の流動床炉とほぼ同一である。但し、流動材を脱硫材に
代えるとともに、流動床ガス化炉(80)で生成されたS
Ox を含むガス化ガス(81) を流動床脱硫炉(90)の目
皿下方から流動層に噴出させて、最適な温度と滞留時間
で脱硫材(12)と反応させ、脱塵装置(20)へ導くよう
にする。The structure of the fluidized bed desulfurization furnace (90) is almost the same as that of a conventional fluidized bed furnace. However, while replacing the fluidized material with desulfurized material, the sulfur generated in the fluidized bed gasifier (80)
The gasification gas (81) containing O x is ejected from below the plate of the fluidized bed desulfurization furnace (90) into the fluidized bed, and reacts with the desulfurization material (12) at an optimum temperature and residence time to form a dust removal device ( 20).
【0019】脱硫性能を高めるためには、例えば脱硫剤
として石灰石を用いる場合、反応域温度を1000℃以
下に保持する必要がある。ところが石炭のガス化反応部
では温度が1000℃以上となる。したがって、従来の
方法では、ガス化反応(H2S等発生)と脱硫反応(H2S
等消滅、CaS生成)とが同時に進行し、石灰石で脱硫固
定された硫黄分が再びSOX として遊離したり、ガス化
反応が炉上部で生じて、脱硫されないガスがそのまま炉
外に排出されたりする。本実施例のガス化燃焼方法にお
いては、ガス化反応と脱硫反応とが同一の流動床内で行
なわれず、分離された別個の炉内で行なわれるので、脱
硫性能が著しく向上する。In order to enhance desulfurization performance, for example, when limestone is used as a desulfurizing agent, it is necessary to maintain the reaction zone temperature at 1000 ° C. or lower. However, in the coal gasification reaction section, the temperature is 1000 ° C. or higher. Therefore, in the conventional method, the gasification reaction (H 2 S generation etc.) and the desulfurization reaction (H 2 S
At the same time, the sulfur content fixed by desulfurization with limestone is released again as SO X , or the gasification reaction occurs at the upper part of the furnace, and the gas that is not desulfurized is discharged out of the furnace as it is. I do. In the gasification combustion method of the present embodiment, the gasification reaction and the desulfurization reaction are not performed in the same fluidized bed but are performed in separate furnaces, so that the desulfurization performance is significantly improved.
【0020】図2は、ガス化炉と脱硫炉を分離した本実
施例の場合(a)と、それらを一体にした従来の方法に
よる場合(b)とについて、脱硫炉内のH2S濃度分布
を比較した例を示す。従来の方法によればガス化/脱硫
炉出口でH2 S濃度が高いのに比べて、本実施例の方法
では脱硫炉出口のH2 S濃度が著しく低いのが判る。FIG. 2 shows the H 2 S concentration in the desulfurization furnace in the case of this embodiment (a) in which the gasification furnace and the desulfurization furnace are separated and in the case of the conventional method in which they are integrated (b). The example which compared distribution is shown. According to the conventional method, the H 2 S concentration at the outlet of the gasification / desulfurization furnace is high, whereas the H 2 S concentration at the outlet of the desulfurization furnace is remarkably low in the method of this embodiment.
【0021】本実施例では、流動床燃焼炉(30)内に熱
交換器を設置せず、流動床の温度制御は、流動床燃焼炉
に供給する空気量を増減することにより行なう。したが
って、流動床燃焼炉(30)内が大量の蒸気または水で冷
却されることがないので、燃料(11)の持つ化学エネル
ギを全量、燃焼ガス(61)の熱エネルギに転換させるこ
とができ、その燃焼ガス(61)をガスタービン等に供給
することになるので、コンバインドサイクルの発電効率
が高くなる。In this embodiment, a heat exchanger is not installed in the fluidized bed combustion furnace (30), and the temperature of the fluidized bed is controlled by increasing or decreasing the amount of air supplied to the fluidized bed combustion furnace. Therefore, since the inside of the fluidized bed combustion furnace (30) is not cooled by a large amount of steam or water, all the chemical energy of the fuel (11) can be converted into the heat energy of the combustion gas (61). Since the combustion gas (61) is supplied to a gas turbine or the like, the power generation efficiency of the combined cycle is increased.
【0022】本実施例ではまた、石炭等の燃料を流動床
ガス化炉(80)だけではなく、流動床燃焼炉(30)にも
供給するとともに、流動床ガス化炉(80)、流動床燃焼
炉(30)および二次コンバスタ(60)にそれぞれ別個に
空気を供給できるようにしたので、ガスタービン等の負
荷変化時に燃焼ガス(61)の量の変化速度を増加させる
ことができる。例えば、燃焼ガス(61)の量を増やす場
合は、流動床ガス化炉(80)に供給する燃料(11a)と
空気(71)、および流動床燃焼炉(30)に供給する燃料
(11b)と空気(72)を同時に増すことにより、燃焼ガ
ス量を急速に増加させ、その後、流動床ガス化炉(80)
から流動床燃焼炉(30)へ移送されるチャー等(82)の
量が増大したら、流動床燃焼炉(30)に供給する燃料
(11b)を停止する。燃焼ガス量を減らす場合は、上記
と逆の操作を行なう。In this embodiment, fuel such as coal is supplied not only to the fluidized-bed gasifier (80) but also to the fluidized-bed combustion furnace (30). Since the air can be separately supplied to the combustion furnace (30) and the secondary combustor (60), the rate of change of the amount of the combustion gas (61) can be increased when the load of the gas turbine or the like changes. For example, when increasing the amount of the combustion gas (61), the fuel (11a) and the air (71) supplied to the fluidized bed gasifier (80), and the fuel (11b) supplied to the fluidized bed combustion furnace (30) And the air (72) simultaneously increase the amount of combustion gas rapidly, and then the fluidized bed gasifier (80)
When the amount of char and the like (82) transferred from the furnace to the fluidized bed combustion furnace (30) increases, the fuel (11b) supplied to the fluidized bed combustion furnace (30) is stopped. To reduce the amount of combustion gas, the reverse operation is performed.
【0023】[0023]
【発明の効果】本発明のガス化燃焼方法によれば、粗悪
燃料をガスタービン用等としてガス化改質する場合で
も、脱硫性能が良く、かつ負荷応答性が良好なので、高
効率のコンバインドサイクルを構成することができる。According to the gasification combustion method of the present invention, even when a poor fuel is gasified and reformed for use in a gas turbine or the like, the desulfurization performance is good and the load response is good. Can be configured.
【図1】図1は本発明方法の一実施例に使用される装置
を示す系統図である。FIG. 1 is a system diagram showing an apparatus used in an embodiment of the method of the present invention.
【図2】図2は本発明方法の効果を説明する図である。FIG. 2 is a diagram illustrating the effect of the method of the present invention.
【図3】図3は従来のガス化燃焼方法を実施する装置の
一例を示す系統図である。FIG. 3 is a system diagram showing an example of an apparatus for performing a conventional gasification combustion method.
(10) 流動床ガス化炉(ガ
ス化/脱硫炉) (11),(11a),(11b) 石炭 (12) 脱硫剤 (13) 可燃ガス (14) チャーと脱硫剤の混
合物 (20) 脱塵装置 (21) 可燃ガス (22) チャーと脱硫剤等の
混合物 (30) 流動床燃焼炉 (31) 燃焼ガス (32) 抜き出し灰 (40) 熱交換器 (41) スチームまたは水 (50) 脱塵装置 (51) 燃焼ガス (52) 排出灰 (60) 二次コンバスタ (61) 燃焼ガス (70),(71),(72),(73) 空気 (80) 流動床ガス化炉 (81) ガス化ガス (82) チャー (90) 流動床脱硫炉 (91) 脱硫剤と硫化カルシ
ウムの混合物(10) Fluidized bed gasifier (gasifier / desulfurizer) (11), (11a), (11b) Coal (12) Desulfurizer (13) Combustible gas (14) Mixture of char and desulfurizer (20) Desulfurizer Dust system (21) Combustible gas (22) Mixture of char and desulfurizing agent (30) Fluidized bed combustion furnace (31) Combustion gas (32) Extracted ash (40) Heat exchanger (41) Steam or water (50) Degas Dust system (51) Combustion gas (52) Ash (60) Secondary combustor (61) Combustion gas (70), (71), (72), (73) Air (80) Fluidized bed gasifier (81) Gasification gas (82) Char (90) Fluidized bed desulfurization furnace (91) Mixture of desulfurizing agent and calcium sulfide
フロントページの続き (72)発明者 中島 文也 東京都千代田区丸の内二丁目5番1号 三菱重工業株式会社内 (58)調査した分野(Int.Cl.6,DB名) F23C 11/02Continued on the front page (72) Inventor Fumiya Nakajima 2-5-1, Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Heavy Industries, Ltd. (58) Field surveyed (Int. Cl. 6 , DB name) F23C 11/02
Claims (1)
て上記燃料の一部をガス化し、生じた可燃ガスと脱硫剤
とを流動床脱硫炉に供給して、上記可燃ガスを脱硫した
後、二次コンバスタへ導くとともに、上記流動床ガス化
炉でガス化しなかった残りの燃料および上記流動床脱硫
炉で生じた硫黄化合物と残りの脱硫剤を流動床燃焼炉に
導いて、別途供給する燃料とともに別途供給する空気に
より燃焼させ、生じた燃焼ガスを更に上記二次コンバス
タに導いて、別途供給する空気とともに上記可燃ガスを
燃焼させること特徴とするガス化燃焼方法。1. A fuel and air are supplied to a fluidized-bed gasifier to gasify a part of the fuel, and the resulting combustible gas and desulfurizing agent are supplied to a fluidized-bed desulfurizer to convert the combustible gas into gas. After desulfurization, while leading to the secondary combustor, the remaining fuel not gasified in the fluidized bed gasifier and the sulfur compounds and the remaining desulfurizing agent produced in the fluidized bed desulfurization furnace are guided to the fluidized bed combustion furnace, A gasification combustion method characterized by burning by separately supplied air together with separately supplied fuel, further guiding generated combustion gas to the secondary combustor, and burning the combustible gas together with separately supplied air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4818491A JP2755835B2 (en) | 1991-03-13 | 1991-03-13 | Gasification combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4818491A JP2755835B2 (en) | 1991-03-13 | 1991-03-13 | Gasification combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04283303A JPH04283303A (en) | 1992-10-08 |
| JP2755835B2 true JP2755835B2 (en) | 1998-05-25 |
Family
ID=12796302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4818491A Expired - Fee Related JP2755835B2 (en) | 1991-03-13 | 1991-03-13 | Gasification combustion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2755835B2 (en) |
-
1991
- 1991-03-13 JP JP4818491A patent/JP2755835B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04283303A (en) | 1992-10-08 |
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