JPS62185788A - Feeding of coal in coal gasification power generation - Google Patents
Feeding of coal in coal gasification power generationInfo
- Publication number
- JPS62185788A JPS62185788A JP2728686A JP2728686A JPS62185788A JP S62185788 A JPS62185788 A JP S62185788A JP 2728686 A JP2728686 A JP 2728686A JP 2728686 A JP2728686 A JP 2728686A JP S62185788 A JPS62185788 A JP S62185788A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- power generation
- slurry
- oven
- aqueous slurry
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 49
- 238000010248 power generation Methods 0.000 title claims abstract description 11
- 238000002309 gasification Methods 0.000 title abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 12
- 239000003034 coal gas Substances 0.000 claims 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 210000003296 saliva Anatomy 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は石炭ガス化複合発電における石炭フィード方法
に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a coal feeding method in a coal gasification combined cycle power generation.
（従来技術とその問題点）
火力発電において従来主流を占めている石油焚火力発電
に対して石炭を燃料とする発電が注目され始めている。(Prior Art and its Problems) In contrast to oil-fired power generation, which has traditionally been the mainstream in thermal power generation, power generation using coal as fuel is beginning to attract attention.
またその実現に当たって石炭そのものを焚くことなく一
旦石炭をガス化し、その燃焼ガスを利用して高効率で発
電できる複合発電、例えば燃焼ガスにより駆動されるガ
スタービンと、その排熱をボイラーに供給してその発生
蒸気により駆動される蒸気タービンによりそれぞれ発電
する所謂複合発電が大きく注目されている。In order to achieve this, coal is first gasified without burning the coal itself, and then the combustion gas is used to generate combined power generation with high efficiency.For example, a gas turbine is driven by the combustion gas, and its waste heat is supplied to a boiler. So-called combined power generation, in which power is generated by a steam turbine driven by the steam generated by the steam, is attracting a lot of attention.
ところで都市周辺に建設されることが殆どある火力発電
プラントの実現に当たっては、問題点としてよく知られ
ている大規模な貯炭場の必要から生ずる用地確保の困難
や建設コストの上昇、更には周辺環境に与える公害問題
の解決が強く要求される。そこでその解決手段として微
粉化した石炭を水を搬送体として利用してパイプライン
中を輸送する所謂石炭水スラリーフィード方式が提案さ
れた。この方式は微粉化された石炭を空気を搬送体とし
て利用してパイプライン中を輸送するドライフィード方
式に比してハンドリングにすぐれる利点があり、発電プ
ラントから遠く離れた場所に陸揚げされた石炭を微粉化
して発電プラントまで輸送できる。従って前記した用地
の取得難や公害の問題が一挙に解決されるため、その採
用の機運は最近とみに高まりつつある。By the way, in realizing thermal power plants, which are almost always built around cities, there are well-known problems such as difficulty in securing land due to the need for large-scale coal storage facilities, increased construction costs, and problems with the surrounding environment. There is a strong demand for a solution to the pollution problem caused by As a solution to this problem, a so-called coal-water slurry feed method was proposed in which pulverized coal is transported through a pipeline using water as a carrier. This method has the advantage of superior handling compared to the dry feed method, which transports pulverized coal through pipelines using air as a carrier, and allows coal to be unloaded far from the power plant. can be pulverized and transported to power plants. Therefore, the above-mentioned problems of land acquisition difficulties and pollution can be solved all at once, and the momentum for its adoption is increasing recently.
しかし石炭水スラリーフィード方式によって輸送されて
来た石炭をそのまま石炭ガス化炉に供給してガス化を行
おうとすると、石炭と共に炉内に供給されるスラリー水
の蒸発熱のため、ドライフィード方式に比べてガス化炉
内の温度が上昇しにくくなり、石炭中の灰分を熔融して
炉内から排出するのが難しくなる。これを防ぐためには
ガス化炉内の空気比を大きくする必要があるが、これで
は石炭ガス化複合発電プラントの熱効率がドライフィー
ド方式により供給する場合に比べて低下するのをまぬが
れ得ない欠点がある。However, if you try to gasify coal that has been transported using the coal-water slurry feed method by directly feeding it into a coal gasifier, the dry feed method will not work because of the heat of evaporation of the slurry water that is fed into the furnace together with the coal. In comparison, it is difficult for the temperature inside the gasifier to rise, making it difficult to melt the ash in the coal and discharge it from the furnace. In order to prevent this, it is necessary to increase the air ratio in the gasifier, but this has the disadvantage that the thermal efficiency of the coal gasification combined cycle power plant inevitably decreases compared to when the coal gasification combined cycle power plant is supplied using the dry feed method. be.
（発明の目的）
本発明は上記の如き石炭水スラリーフィード方式の欠点
の排除を目的としてなされたもので、次に図面を用いて
その詳細を説明する。(Object of the Invention) The present invention has been made with the aim of eliminating the drawbacks of the coal-water slurry feed system as described above, and will next be described in detail with reference to the drawings.
（問題点を解決するための手段）
本発明の特徴とするところは次の点にある。即ち構成概
念図を示す第１図のように、ガスタービン（１）の排気
熱（ａ）を回収し、蒸気タービン（２）の駆動用蒸気（
ｂ）を作るためのガスタービン（１１排熱回収ボイラー
（３）に、その排気熱（例えば１５０℃前後）による乾
燥器（４）を設けて、ここに石炭水スラリー（Ｃ）を通
すことによりスラリー水を蒸気（ｄ）として系外に放出
しく （４ａ）は蒸気放出用ブロアー）、微粉炭（ａ）
のみを気流搬送により石炭ガス化炉（５）に供給するこ
とを特徴とするものである。(Means for Solving the Problems) The present invention is characterized by the following points. That is, as shown in Fig. 1, which shows a conceptual diagram of the configuration, the exhaust heat (a) of the gas turbine (1) is recovered and the driving steam (2) of the steam turbine (2) is recovered.
b) By installing a dryer (4) using the exhaust heat (for example, around 150°C) in the gas turbine (11 exhaust heat recovery boiler (3)) to make the coal-water slurry (C) Slurry water is released as steam (d) to the outside of the system (4a is a steam release blower), and pulverized coal (a)
This is characterized by supplying only the coal gasifier to the coal gasifier (5) by air conveyance.
なお第１図において（５）は石炭ガス化炉、（６）はガ
ス冷却器、（７）はガス精製装置、（８）は燃焼器、（
９）は空気圧縮機、ａのは昇圧機、αＤは発電機、α旧
よ発電機、α旧よ復水器である。そして石炭ガス化炉（
５）による生成ガス（ｆ）は冷却袋！（６）によって適
当温度にまで冷却され、更にガス精製装置（７）によっ
て精製され、これを圧縮機（９）からの燃焼用空気（ｇ
）と共に燃焼器（８）に供給して、ガスタービン（１）
の作動ガス（ｉ）を作り、発電機αＤの駆動ガスタービ
ン（１）を駆動して発電する。またガスタービン排熱回
収ボイラ（３）は蒸気タービン（２）の復水器α尋から
の復水を受けて蒸気Ｕ）を発生し、これはガス冷却器（
６）の熱を利用して作られた蒸気（ト））と共に、発電
機（ロ）駆動用蒸気タービン（２）を駆動して発電する
。ａ４）はスラリータンク、Ｑ５１はフィードポンプ、
α呻は排気スタック、αηは微粉炭ビン、α呻はロック
ホッパ、ａｌは供給ホッパ、（至）はフィードバーナー
であって、乾燥器（４）によるスラリー水の乾燥分離に
よって得られた微粉炭（ｅ）は、気流搬送によって微粉
炭ビンａηに送られてロックホッパ（至）により加圧さ
れ、供給ホッパα唾を介して昇圧機Ｑｌからの燃焼用空
気（２）と共に石炭ガス化炉（５）にドライフィードさ
れる。なお図では蒸気系を簡略化して示している。In Figure 1, (5) is a coal gasification furnace, (6) is a gas cooler, (7) is a gas purification device, (8) is a combustor, (
9) is an air compressor, a is a booster, αD is a generator, α is a generator, α is a condenser. and coal gasifier (
The gas (f) produced by 5) is a cooling bag! The combustion air (g
) together with the gas turbine (1).
A working gas (i) is produced, which drives the driving gas turbine (1) of the generator αD to generate electricity. In addition, the gas turbine exhaust heat recovery boiler (3) receives condensate from the condenser α of the steam turbine (2) and generates steam U), which is in turn generated by the gas cooler (
Together with the steam (g) produced using the heat from step 6), the steam turbine (2) for driving the generator (b) is driven to generate electricity. a4) is the slurry tank, Q51 is the feed pump,
α is an exhaust stack, αη is a pulverized coal bin, α is a lock hopper, al is a supply hopper, and (to) is a feed burner, which is the pulverized coal obtained by drying and separating slurry water in the dryer (4). (e) is sent to the pulverized coal bin aη by air flow conveyance, is pressurized by the lock hopper (to), and is sent to the coal gasifier ( 5) is dry fed. Note that the figure shows a simplified steam system.
（効 果）
以上のようにガスタービン＋１）の排ガスにより石炭水
スラリーを乾燥して石炭のみを石炭ガス化炉内に供給す
るようにすれば、ガス化炉（５）への石炭の供給はドラ
イフィード方式と同等となり、スラリー水の蒸発熱によ
るガス化炉内の温度の低下を防ぐことができる。その結
果石炭水スラリー直接フィード方式に比べて低い空気比
で石炭中の灰分をよく熔融して炉外に排出でき、それだ
け複合発電系の熱効率を高くできる。(Effect) As described above, if the coal-water slurry is dried by the exhaust gas of the gas turbine +1) and only the coal is supplied into the coal gasifier, the coal supply to the gasifier (5) will be reduced. It is equivalent to the dry feed method, and can prevent the temperature inside the gasifier from decreasing due to the heat of evaporation of slurry water. As a result, compared to the coal-water slurry direct feed method, the ash in the coal can be well melted and discharged from the furnace with a lower air ratio, and the thermal efficiency of the combined power generation system can be increased accordingly.
試算によれば、第２図に示すようにガス化炉における空
気比を石炭水スラリーを直接フィードした場合に比べて
約０．０７程度低くでき、これによって複合発電系の熱
効率を石炭水スラリーを直接フィードした場合に比べ相
対値で約２．２％向上できることが判った。なお第２図
においては参考としてドライフィード系炭輸送における
相対熱効率を示しである。According to trial calculations, as shown in Figure 2, the air ratio in the gasifier can be lowered by about 0.07 compared to the case where coal-water slurry is directly fed. It was found that the relative value could be improved by about 2.2% compared to the case of direct feeding. Note that FIG. 2 shows the relative thermal efficiency in dry feed coal transportation for reference.
【図面の簡単な説明】
第１図は本発明の構成概念図、第２図は各種フィード方
式と相対熱効率の比較図である。
（旧・・ガスタービン、（２）・・・蒸気タービン、（
３）・・・ガスタービン排熱回収ボイラー、（４）・・
・ガスタービンの排熱を利用する乾燥器、（５）・・・
石炭ガス化炉、（６）・・・ガス冷却器、（７）・・・
ガス精製装置、（８）・・・燃焼器、（９）・・・圧縮
機、α〔昇圧機、αト・・発電機、（ロ）・・・発電機
、Ｑ３１・・・復水器、Ｑ４）・・・スラリータンク、
α９・・・フィードポンプ、ａＱ・・・排気スタック、
ａη・・・微粉炭ビン、α匂・・・ロックホッパ、α唾
・・・供給ホッパ、（２ｍ・・・フィードバーナ。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual diagram of the structure of the present invention, and FIG. 2 is a comparison diagram of various feed methods and relative thermal efficiency. (Former...gas turbine, (2)...steam turbine, (
3)...Gas turbine exhaust heat recovery boiler, (4)...
・Dryer that utilizes gas turbine exhaust heat, (5)...
Coal gasifier, (6)...gas cooler, (7)...
Gas purification equipment, (8)...combustor, (9)...compressor, α [booster, α-to...generator, (b)...generator, Q31...condenser ,Q4)...slurry tank,
α9...Feed pump, aQ...Exhaust stack,
aη...Pulverized coal bin, α smell...lock hopper, α saliva...supply hopper, (2m...feed burner.
Claims (1)
より石炭水スラリーを一旦乾燥してスラリー水を分離除
去し、石炭のみを気流搬送して石炭ガス化炉に供給する
ことを特徴とする石炭ガス化複合発電における石炭フィ
ード方法。Coal gas characterized in that it is equipped with a dryer that utilizes the exhaust gas of a gas turbine, thereby once drying the coal water slurry, separating and removing the slurry water, and supplying only the coal to the coal gasifier by airflow conveying it. Coal feeding method in combined cycle power generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2728686A JPS62185788A (en) | 1986-02-10 | 1986-02-10 | Feeding of coal in coal gasification power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2728686A JPS62185788A (en) | 1986-02-10 | 1986-02-10 | Feeding of coal in coal gasification power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62185788A true JPS62185788A (en) | 1987-08-14 |
Family
ID=12216832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2728686A Pending JPS62185788A (en) | 1986-02-10 | 1986-02-10 | Feeding of coal in coal gasification power generation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62185788A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5695532A (en) * | 1992-05-08 | 1997-12-09 | State Electricity Commission Of Victoria | Integrated carbonaceous fuel drying and gasification process and apparatus |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4974203A (en) * | 1972-10-12 | 1974-07-17 | ||
| JPS5189502A (en) * | 1974-12-27 | 1976-08-05 | ||
| JPS51151433A (en) * | 1975-06-20 | 1976-12-25 | Hitachi Ltd | Control system of gas producing power plant |
| JPS5543103A (en) * | 1978-09-19 | 1980-03-26 | Texaco Development Corp | Power generation and simultaneous production of synthetic gas consisting of h2 and co |
| JPS56103290A (en) * | 1979-12-14 | 1981-08-18 | Exxon Research Engineering Co | Unified coalldrying and steammgasifying method |
| JPS56110793A (en) * | 1980-02-01 | 1981-09-02 | Texaco Development Corp | Method of feeding dry coal into high pressure gasification reactor |
| JPS59140291A (en) * | 1983-02-01 | 1984-08-11 | Shinenerugii Sogo Kaihatsu Kiko | Gasification of pulverized coal under pressure |
-
1986
- 1986-02-10 JP JP2728686A patent/JPS62185788A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4974203A (en) * | 1972-10-12 | 1974-07-17 | ||
| JPS5189502A (en) * | 1974-12-27 | 1976-08-05 | ||
| JPS51151433A (en) * | 1975-06-20 | 1976-12-25 | Hitachi Ltd | Control system of gas producing power plant |
| JPS5543103A (en) * | 1978-09-19 | 1980-03-26 | Texaco Development Corp | Power generation and simultaneous production of synthetic gas consisting of h2 and co |
| JPS56103290A (en) * | 1979-12-14 | 1981-08-18 | Exxon Research Engineering Co | Unified coalldrying and steammgasifying method |
| JPS56110793A (en) * | 1980-02-01 | 1981-09-02 | Texaco Development Corp | Method of feeding dry coal into high pressure gasification reactor |
| JPS59140291A (en) * | 1983-02-01 | 1984-08-11 | Shinenerugii Sogo Kaihatsu Kiko | Gasification of pulverized coal under pressure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5695532A (en) * | 1992-05-08 | 1997-12-09 | State Electricity Commission Of Victoria | Integrated carbonaceous fuel drying and gasification process and apparatus |
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