JP2003004206A - Bed material circulating device and method of operating fluidized bed boiler - Google Patents
Bed material circulating device and method of operating fluidized bed boilerInfo
- Publication number
- JP2003004206A JP2003004206A JP2001187407A JP2001187407A JP2003004206A JP 2003004206 A JP2003004206 A JP 2003004206A JP 2001187407 A JP2001187407 A JP 2001187407A JP 2001187407 A JP2001187407 A JP 2001187407A JP 2003004206 A JP2003004206 A JP 2003004206A
- Authority
- JP
- Japan
- Prior art keywords
- bed material
- bed
- boiler
- fluidized bed
- fuel
- 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.)
- Granted
Links
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、流動層ボイラにお
けるベッド材循環装置及び流動層ボイラの運転方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed material circulating device in a fluidized bed boiler and a method of operating the fluidized bed boiler.
【０００２】[0002]
【従来の技術】近年、発電所やゴミ焼却炉等において、
石炭やゴミ等の燃料を流動化させ効率よく燃焼させる流
動層ボイラが研究開発されている。流動層ボイラを用い
ることにより、流動層ボイラ内に配設した伝熱管から発
生する蒸気で駆動する蒸気タービン発電システムを構築
できる。また、コンプレッサからの空気で加圧すること
によりボイラ内の酸素分圧を高めた状態の下で燃料を流
動化させ燃焼させる加圧流動層ボイラを用いることによ
り、蒸気タービン発電に加え、ボイラの燃焼排ガスを利
用するガスタービン発電とを組み合わせて熱効率を向上
させた複合発電システムを構築できる。流動層ボイラで
は、石灰石やドロマイト等の脱硫剤が流動層を構成する
流動媒体として使用されている。流動層ボイラ内の流動
媒体の量や粒子径等を制御し流動層高を制御することに
よって発電システムの出力制御を行うことができ、出力
が高い場合には炉底部に滞留したベッド材を炉底部から
抜き出して燃焼制御や流動制御等がされる。炉底部から
抜き出されるベッド材には、未反応の炭酸カルシウムや
未燃炭等が含有されているとともに、多くの微細な亀裂
を有しており比表面積が大きくなっているため、これら
を再利用すれば脱硫剤の有効利用率を向上させて脱硫率
を向上させることができる。そのために、ベッド材を再
利用するためのベッド材循環装置が研究開発されてい
る。2. Description of the Related Art In recent years, in power plants and refuse incinerators,
A fluidized bed boiler that fluidizes fuel such as coal and dust and efficiently burns it has been researched and developed. By using the fluidized bed boiler, it is possible to construct a steam turbine power generation system that is driven by steam generated from the heat transfer tubes arranged in the fluidized bed boiler. Also, by using a pressurized fluidized bed boiler that fluidizes and burns fuel under the condition that oxygen partial pressure in the boiler is increased by pressurizing with air from a compressor, in addition to steam turbine power generation, combustion of the boiler is also performed. A combined power generation system with improved thermal efficiency can be constructed by combining with gas turbine power generation that uses exhaust gas. In a fluidized bed boiler, a desulfurizing agent such as limestone or dolomite is used as a fluidizing medium forming the fluidized bed. The output of the power generation system can be controlled by controlling the fluidized bed height by controlling the amount and particle size of the fluidized medium in the fluidized bed boiler, and when the output is high, the bed material staying at the bottom of the furnace is removed from the furnace. It is extracted from the bottom and combustion control and flow control are performed. The bed material extracted from the bottom of the furnace contains unreacted calcium carbonate, unburned charcoal, etc., and also has many fine cracks and has a large specific surface area. Then, the effective utilization rate of the desulfurizing agent can be improved and the desulfurization rate can be improved. Therefore, a bed material circulating device for reusing the bed material is being researched and developed.
【０００３】従来のベッド材循環装置としては、実開平
３−１２８２０８号公報（以下、イ号公報という）に、
「サイクロンで分離された灰塵、未燃炭あるいはベッド
材等の固形物を排出する固形物排出口を流動層ボイラの
流動層形成部に結び、分離された灰塵、未燃炭等を再導
入するための導入通路を形成した加圧流動層ボイラ」が
開示されている。A conventional bed material circulating device is disclosed in Japanese Utility Model Laid-Open No. 3-128208 (hereinafter referred to as “B”).
`` Connect a solids discharge port that discharges solids such as ash dust, unburned coal or bed material separated by cyclone to the fluidized bed forming part of the fluidized bed boiler to re-introduce separated ash dust, unburned coal, etc. A pressurized fluidized bed boiler having an introduction passage "is disclosed.
【０００４】実開平６−６５７０９号公報（以下、ロ号
公報という）に、「余剰のベッド材が排出されるベッド
材排出管と、排出されたベッド材が貯蔵される補充ベッ
ド材容器と、を備え、流動層を形成するためのベッド材
が不足するときに補充ベッド材容器からボイラ本体の流
動層にベッド材が補給される加圧流動層ボイラ」が開示
されている。In Japanese Utility Model Publication No. 6-65709 (hereinafter referred to as "B"), "a bed material discharge pipe for discharging excess bed material, a replenishing bed material container for storing the discharged bed material, And a pressurized fluidized bed boiler in which the bed material is replenished from the replenishment bed material container to the fluidized bed of the boiler body when the bed material for forming the fluidized bed is insufficient.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上記従来
の技術においては、以下のような課題を有していた。
（１）イ号公報に開示の技術は、サイクロンで分離され
た灰塵、未燃炭あるいはベッド材等の固形物を流動層内
へ再導入しているが、炉底部から抜き出されたベッド材
は廃棄している。そのため、所望の脱硫率を得るために
は大量の脱硫剤を供給しなければならず（所要Ｃａ／Ｓ
モル比は目標の３以下に対し６程度）、脱硫剤の有効利
用率が低いという課題を有していた。
（２）ロ号公報に開示の技術は、余剰のベッド材が排出
されるベッド材排出管と、排出されたベッド材が貯蔵さ
れる補充ベッド材容器と、を備えているので、炉底部か
ら抜き出されたベッド材を流動層へ再導入することがで
きる。しかし、ベッド材は燃料と別の系統を用いてボイ
ラ本体に補給されるので、ボイラに供給直後に燃料が揮
発して発生する高濃度のＳＯｘをベッド材が効率よく捕
捉することができず、ベッド材を脱硫剤として有効に利
用できないという課題を有していた。
（３）流動層を形成するためのベッド材が不足するとき
にのみ補充ベッド材容器からボイラ本体の流動層にベッ
ド材を補給するので、炉底部から抜き出された炉底灰の
循環量は十分でなく有効利用率が依然として低いという
課題を有していた。However, the above conventional techniques have the following problems. (1) The technique disclosed in the publication No. A re-introduces solid matter such as ash dust, unburned coal or bed material separated by a cyclone into the fluidized bed, but the bed material extracted from the furnace bottom is Is abandoned. Therefore, a large amount of desulfurizing agent must be supplied to obtain the desired desulfurization rate (required Ca / S
The molar ratio was about 6 against the target of 3 or less), and there was a problem that the effective utilization rate of the desulfurization agent was low. (2) Since the technique disclosed in the publication (B) includes a bed material discharge pipe for discharging excess bed material and a replenishment bed material container for storing the discharged bed material, the bed material is discharged from the bottom of the furnace. The extracted bed material can be reintroduced into the fluidized bed. However, since the bed material is replenished to the boiler main body using a system different from the fuel, the bed material cannot efficiently capture the high concentration SOx generated by volatilization of the fuel immediately after being supplied to the boiler, There is a problem that the bed material cannot be effectively used as a desulfurizing agent. (3) Since the bed material is replenished from the replenishment bed material container to the fluidized bed of the boiler main body only when the bed material for forming the fluidized bed is insufficient, the circulation amount of the furnace bottom ash extracted from the furnace bottom is There was a problem that it was not sufficient and the effective utilization rate was still low.
【０００６】本発明は上記従来の課題を解決するもの
で、ベッド材を再利用して脱硫剤の有効利用率を向上さ
せるとともに脱硫率も向上させることができ、また既存
の設備も有効に利用することができ設備負荷の小さなベ
ッド材循環装置を提供することを目的とする。また、本
発明は、脱硫剤の使用量を低減し脱硫剤の有効利用率を
高める流動層ボイラの運転方法を提供することを目的と
する。The present invention solves the above-mentioned conventional problems. The bed material can be reused to improve the effective utilization rate of the desulfurizing agent and the desulfurization rate, and the existing equipment can be effectively utilized. It is an object of the present invention to provide a bed material circulating device that can be manufactured and has a small equipment load. Another object of the present invention is to provide a method for operating a fluidized bed boiler that reduces the amount of desulfurization agent used and increases the effective utilization rate of the desulfurization agent.
【０００７】[0007]
【課題を解決するための手段】上記従来の課題を解決す
るために本発明のベッド材循環装置及び流動層ボイラの
運転方法は、以下の構成を有している。In order to solve the above-mentioned conventional problems, a bed material circulating apparatus and a method for operating a fluidized bed boiler of the present invention have the following configurations.
【０００８】本発明の請求項１に記載のベッド材循環装
置は、流動層ボイラと、前記流動層ボイラに燃料を供給
する燃料供給装置と、前記流動層ボイラの炉底部に一端
部が接続され前記炉底部に滞留したベッド材を抜き出す
ベッド材抜出管と、前記ベッド材抜出管の他端部に接続
され前記燃料供給装置に前記ベッド材を搬送・供給する
ベッド材搬送路と、を備えた構成を有している。この構
成により、以下のような作用が得られる。
（１）ベッド材搬送路によってベッド材が供給される燃
料調整装置を有しており、燃料に混合されてベッド材が
流動層ボイラに供給されるので、未反応の炭酸カルシウ
ムが含有されているとともに多くの微細な亀裂を有し比
表面積の大きなベッド材が、供給直後に燃料が揮発して
発生する高濃度のＳＯｘを効率よく捕捉することがで
き、脱硫率を向上させることができるとともにベッド材
を脱硫剤として有効に利用することができる。
（２）ベッド材搬送路を有しているので、脱硫剤の一部
をベッド材で置き換えることができ、脱硫剤の使用量を
低減し脱硫剤の有効利用率を高めることができる。
（３）既存の流動層ボイラのベッド材抜出管から抜き出
されたベッド材を搬送するベッド材搬送路を配設するだ
けの小規模な改良によって、脱硫剤の有効利用率を高め
ることができる。In the bed material circulating apparatus according to claim 1 of the present invention, one end is connected to a fluidized bed boiler, a fuel supply device for supplying fuel to the fluidized bed boiler, and a furnace bottom portion of the fluidized bed boiler. A bed material extracting pipe for extracting the bed material accumulated in the furnace bottom, and a bed material conveying path connected to the other end of the bed material extracting pipe for conveying and supplying the bed material to the fuel supply device, It has a configuration provided. With this configuration, the following effects can be obtained. (1) It has a fuel adjusting device to which the bed material is supplied by the bed material conveying path, and the bed material is mixed with the fuel and supplied to the fluidized bed boiler, so that it contains unreacted calcium carbonate. In addition, the bed material having many fine cracks and a large specific surface area can efficiently capture a high concentration of SOx generated by volatilization of the fuel immediately after the supply, and can improve the desulfurization rate and the bed. The material can be effectively used as a desulfurizing agent. (2) Since the bed material transport path is provided, a part of the desulfurizing agent can be replaced with the bed material, the amount of the desulfurizing agent used can be reduced, and the effective utilization rate of the desulfurizing agent can be increased. (3) The effective utilization rate of the desulfurizing agent can be increased by a small-scale improvement in which a bed material conveying path for conveying the bed material extracted from the bed material extracting pipe of the existing fluidized bed boiler is provided. it can.
【０００９】ここで、ベッド材としては、流動層ボイラ
に供給されたＣａＣＯ3（又は石灰石），ＭｇＣＯ3（又
はドロマイト）の他、ＣａＯ（生石灰），Ｃａ（ＯＨ）
2（消石灰），Ｋ2ＣＯ3，貝殻等のカルシウムを含む水
産廃棄物，セメントスラッジ等の脱硫剤や、石炭，亜
炭，褐炭，瀝青炭，コークス，石油コークス，オイルコ
ークス，オイルサンド，重質油，石炭液化残渣，ゴム，
古タイヤ，廃油，一般ゴミ，一般廃棄物，木質物，炭化
物，ＲＤＦやその他の炭化物，木屑，産業廃棄物，食品
工場や農業等で排出される有機残渣物，下水汚泥，し尿
処理汚泥，工業廃水処理汚泥等やこれらの混合物である
固体燃料の燃焼灰が用いられる。Here, as the bed material, in addition to CaCO 3 (or limestone), MgCO 3 (or dolomite) supplied to the fluidized bed boiler, CaO (quick lime), Ca (OH)
2 (slaked lime), K 2 CO 3 , aquatic wastes containing calcium such as shells, desulfurizing agents such as cement sludge, coal, lignite, brown coal, bituminous coal, coke, petroleum coke, oil coke, oil sand, heavy oil , Coal liquefaction residue, rubber,
Old tires, waste oil, general waste, general waste, woody substances, carbides, RDF and other carbides, wood waste, industrial waste, organic residues discharged from food factories and agriculture, sewage sludge, human waste treatment sludge, industrial The combustion ash of solid fuel, which is a mixture of wastewater treatment sludge and the like, is used.
【００１０】また、燃料供給装置としては、石炭等の固
体燃料と石灰石やドロマイト等の脱硫剤等と水とを湿式
混合してペースト化した燃料スラリーを調整する燃料ス
ラリー調整装置、固体燃料と脱硫剤等とを乾式混合しロ
ックホッパを介して流動層ボイラ内へ供給する燃料供給
ホッパ等が用いられる。As the fuel supply device, a solid fuel such as coal, a desulfurizing agent such as limestone or dolomite, and water are wet-mixed to prepare a fuel slurry prepared as a paste, a solid fuel and desulfurization device. A fuel supply hopper or the like is used, which is dry-mixed with an agent or the like and is supplied into the fluidized bed boiler through a lock hopper.
【００１１】ここで、燃料調整装置へ供給され石灰石等
の脱硫剤と置き換えられるベッド材の置換量としては、
１〜５０ｗｔ％好ましくは５〜３０ｗｔ％が好適に用い
られる。置換量が５〜３０ｗｔ％のときは、流動層高の
維持が容易であるとともに脱硫率を向上させるができる
ため好ましい。置換量が５ｗｔ％より少なくなるにつれ
脱硫率を向上させる効果が低下する傾向がみられ、３０
ｗｔ％より多くなるにつれ燃焼排ガス中への飛散量が増
加し流動層高の維持が困難になる傾向がみられるため好
ましくない。特に、１ｗｔ％より少なくなるか５０ｗｔ
％より多くなると、これらの傾向が著しくなるためいず
れも好ましくない。Here, the replacement amount of the bed material which is supplied to the fuel adjusting device and is replaced with the desulfurizing agent such as limestone is as follows.
1 to 50 wt%, preferably 5 to 30 wt% is suitably used. When the substitution amount is 5 to 30 wt%, the fluidized bed height can be easily maintained and the desulfurization rate can be improved, which is preferable. As the substitution amount becomes less than 5 wt%, the effect of improving the desulfurization rate tends to decrease.
When the content is more than wt%, the amount of scattering in the combustion exhaust gas increases, and it tends to be difficult to maintain the height of the fluidized bed, which is not preferable. Especially, less than 1 wt% or 50 wt
If it is more than 0.1%, these tendencies become remarkable, and neither is preferable.
【００１２】本発明の請求項２に記載の流動層ボイラの
運転方法は、流動層ボイラの炉底部に接続されたベッド
材抜出管から前記炉底部に滞留したベッド材を抜き出す
ベッド材抜出工程と、前記ベッド材抜出工程で抜き出さ
れた前記ベッド材を前記流動層ボイラに燃料を供給する
燃料供給装置に搬送・供給するベッド材搬送工程と、を
備えた構成を有している。この構成により、以下のよう
な作用が得られる。
（１）抜き出されたベッド材を燃料調整装置に搬送・供
給するベッド材搬送工程を有しているので、燃料に混合
されてベッド材が流動層ボイラに供給され、供給直後に
燃料が揮発して発生する高濃度のＳＯｘをベッド材が効
率よく捕捉することができ、ベッド材を脱硫剤として有
効に利用することができる。
（２）脱硫剤の一部をベッド材で置き換えることがで
き、脱硫剤の使用量を低減し脱硫剤の有効利用率を高め
ることができる。A method for operating a fluidized bed boiler according to a second aspect of the present invention is a bed material withdrawal, in which a bed material withdrawn from the bed bottom is connected to a bed bottom of the fluidized bed boiler. And a bed material conveying step of conveying and supplying the bed material extracted in the bed material extracting step to a fuel supply device that supplies fuel to the fluidized bed boiler. . With this configuration, the following effects can be obtained. (1) Since it has a bed material conveying step of conveying and supplying the extracted bed material to the fuel adjustment device, the bed material is mixed with fuel and the bed material is supplied to the fluidized bed boiler, and the fuel volatilizes immediately after the supply. The bed material can efficiently capture the high-concentration SOx generated as a result, and the bed material can be effectively used as a desulfurizing agent. (2) A part of the desulfurizing agent can be replaced with the bed material, the amount of the desulfurizing agent used can be reduced, and the effective utilization rate of the desulfurizing agent can be increased.
【００１３】[0013]
【発明の実施の形態】以下、本発明の一実施の形態を、
図面を参照しながら説明する。
（実施の形態１）図１は本実施の形態１におけるベッド
材循環装置の要部構成図である。図中、１はコンプレッ
サ１０からの圧縮空気が供給される圧力容器、２は圧力
容器１に内設され圧力容器１内に取り入れられた圧縮空
気が底部から供給される加圧流動層ボイラ、２ａは加圧
流動層ボイラ２の流動層２ｂ内に配設された伝熱管、３
は加圧流動層ボイラ２の頂部に配設された燃焼排ガス流
路、４は燃焼排ガス流路３の出口に配設されたサイクロ
ン等の１次脱塵装置、５は１次脱塵装置４で１次脱塵さ
れた１次脱塵ガス流路、６は1次脱塵ガス流路５を流れ
る１次脱塵ガスの脱塵を行うサイクロン等の２次脱塵装
置、７は２次脱塵装置６で脱塵された清浄ガスの清浄ガ
ス流路、８は清浄ガスによって駆動されるガスタービ
ン、９は発電機、１０はコンプレッサ、１１は石炭等の
燃料と石灰石等の脱硫剤と水等とが混合されてペースト
化された燃料スラリーを調整及び貯留する燃料調整装置
としての燃料スラリー調整装置、１２は燃料スラリー調
整装置１１に接続され加圧流動層ボイラ２に燃料スラリ
ーを輸送するスラリーポンプ、１３は一端がスラリーポ
ンプ１２に接続され他端が燃料スラリーを加圧流動層ボ
イラ２内に噴射するスラリー噴射ノズル（図示しない）
に接続されたスラリー供給路、１４は加圧流動層ボイラ
２の炉底部に接続され加圧流動層ボイラ２の炉底部に滞
留した石炭灰や石灰石等のベッド材を加圧流動層ボイラ
２及び圧力容器１の外部に抜き出すベッド材抜出管、１
４ａはベッド材抜出管１４に配設され抜き出されたベッ
ド材を系外に排出する場合に作動させる三方弁等からな
る分岐弁、１５は一端部が分岐弁１４ａに接続され分岐
弁１４ａを通過したベッド材を燃料スラリー調整装置１
１に搬送供給するベッド材搬送路である。なお、ベッド
材搬送路１５では、気流搬送，バケットエレベータ，ベ
ルトコンベア等の搬送手段によってベッド材が搬送され
る。また、ベッド材抜出管１４のように圧力容器１を貫
通して常圧系と加圧系が切り替わる箇所には、圧力調整
のためのロックホッパシステム（図示しない）が配設さ
れている。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below.
A description will be given with reference to the drawings. (Embodiment 1) FIG. 1 is a main part configuration diagram of a bed material circulating apparatus in the present embodiment 1. In the figure, 1 is a pressure vessel to which compressed air from the compressor 10 is supplied, 2 is a pressurized fluidized bed boiler which is installed in the pressure vessel 1 and to which compressed air taken into the pressure vessel 1 is supplied from the bottom, 2a Is a heat transfer tube provided in the fluidized bed 2b of the pressurized fluidized bed boiler 2;
Is a combustion exhaust gas passage disposed at the top of the pressurized fluidized bed boiler 2, 4 is a primary dust removing device such as a cyclone disposed at the outlet of the combustion exhaust gas passage 3, and 5 is a primary dust removing device 4 The primary dedusting gas flow path that has undergone primary dedusting by 6 is a secondary dedusting device such as a cyclone for dedusting the primary dedusting gas flowing through the primary dedusting gas flow path 5, and 7 is a secondary A clean gas flow path for clean gas dedusted by the dust remover 6, 8 a gas turbine driven by clean gas, 9 a generator, 10 a compressor, 11 a fuel such as coal and a desulfurizing agent such as limestone A fuel slurry adjusting device as a fuel adjusting device for adjusting and storing the fuel slurry which is mixed with water or the like and made into a paste, and 12 is connected to the fuel slurry adjusting device 11 and transports the fuel slurry to the pressurized fluidized bed boiler 2. One end of the slurry pump 13 is connected to the slurry pump 12, and the other A slurry injection nozzle (not shown) whose end injects fuel slurry into the pressurized fluidized bed boiler 2
Is connected to the furnace bottom of the pressurized fluidized bed boiler 2, and the bed material such as coal ash or limestone staying at the furnace bottom of the pressurized fluidized bed boiler 2 is connected to the pressurized fluidized bed boiler 2 and Bed material withdrawal pipe for withdrawing to the outside of the pressure vessel 1,
Reference numeral 4a denotes a branch valve which is provided in the bed material extraction pipe 14 and is composed of a three-way valve or the like which is operated when the extracted bed material is discharged to the outside of the system. Reference numeral 15 denotes a branch valve 14a having one end connected to the branch valve 14a. The bed material that has passed through the fuel slurry adjusting device 1
1 is a bed material transport path for transporting and supplying to bed 1. In addition, in the bed material conveying path 15, the bed material is conveyed by a conveying means such as an air flow conveyer, a bucket elevator, and a belt conveyor. Further, a lock hopper system (not shown) for pressure adjustment is arranged at a portion such as the bed material extracting pipe 14 which penetrates the pressure vessel 1 and switches between the normal pressure system and the pressurization system.
【００１４】以上のように構成された本実施の形態１の
ベッド材循環装置について、以下その運転方法を説明す
る。石炭等の固体燃料と石灰石やドロマイト等の脱硫剤
と水とを燃料スラリー調整装置１１でペースト化し燃料
スラリーを調整し、燃料スラリー調整装置１１に貯留し
ておく。圧力容器１内に内設した加圧流動層ボイラ２で
は燃料スラリーをスラリー供給路１３から入れ、圧力容
器１内に取り入れた圧縮空気を加圧流動層ボイラ２の底
部から供給し、脱硫剤を流動状態にして固体燃料を０．
６〜３．１ＭＰａの圧力で８００〜９５０℃の温度で燃
焼させている。固体燃料の燃焼で発生した熱は伝熱管２
ａで熱交換され蒸気タービン発電機（図示せず）を駆動
して発電を行う。燃焼排ガスは燃焼排ガス流路３から１
次脱塵装置４、２次脱塵装置６を経て脱塵された後、清
浄ガス流路７を通過してガスタービン８、発電機９を駆
動し発電する。加圧流動層ボイラ２の炉底部に石炭灰や
石灰石等のベッド材が滞留し流動層２ｂの層高が高くな
ったときは、ベッド材抜出管１４から炉底部に滞留して
いるベッド材を抜き出す。ベッド材は、ベッド材搬送路
１５を搬送され所定量秤量され、燃料スラリー調整装置
１１で燃料等と混合されて燃料スラリーに調整される。
燃料スラリーに混合されたベッド材は、スラリー供給路
１３から燃料とともに加圧流動層ボイラ２に供給されベ
ッド材が循環される。ベッド材の循環量が増加した場合
には、分岐弁１４ａを作動させてベッド材を系外に排出
する。The operation method of the bed material circulating apparatus of the first embodiment constructed as above will be described below. A solid fuel such as coal, a desulfurizing agent such as limestone or dolomite, and water are made into a paste by the fuel slurry adjusting device 11 to adjust the fuel slurry and stored in the fuel slurry adjusting device 11. In the pressurized fluidized bed boiler 2 installed inside the pressure vessel 1, the fuel slurry is put in from the slurry supply path 13, the compressed air taken in the pressure vessel 1 is supplied from the bottom of the pressurized fluidized bed boiler 2, and the desulfurizing agent is supplied. The solid fuel is brought to a fluidized state by adding 0.
Combustion is performed at a pressure of 6 to 3.1 MPa and a temperature of 800 to 950 ° C. The heat generated by the combustion of the solid fuel is the heat transfer tube 2
Heat is exchanged at a to drive a steam turbine generator (not shown) to generate electricity. Combustion exhaust gas is from combustion exhaust gas passage 3 to 1
After the dust is removed through the secondary dust remover 4 and the secondary dust remover 6, it passes through the clean gas passage 7 to drive the gas turbine 8 and the generator 9 to generate electricity. When bed material such as coal ash or limestone stays at the bottom of the pressurized fluidized bed boiler 2 and the bed height of the fluidized bed 2b becomes high, the bed material staying at the bottom of the bed through the bed material extraction pipe 14 Pull out. The bed material is conveyed through the bed material conveying path 15 and weighed by a predetermined amount, and mixed with fuel or the like by the fuel slurry adjusting device 11 to be adjusted into fuel slurry.
The bed material mixed with the fuel slurry is supplied from the slurry supply passage 13 to the pressurized fluidized bed boiler 2 together with the fuel, and the bed material is circulated. When the circulation amount of the bed material is increased, the branch valve 14a is operated to discharge the bed material out of the system.
【００１５】以上のように、本実施の形態１におけるベ
ッド材循環装置は構成されているので、以下のような作
用が得られる。
（１）ベッド材搬送路によってベッド材が供給される燃
料調整装置を有しており、燃料に混合されてベッド材が
流動層ボイラに供給されるので、供給直後に燃料が揮発
して発生する高濃度のＳＯｘをベッド材が効率よく捕捉
することができ、脱硫率を向上させることができるとと
もに、ベッド材を脱硫剤として有効に利用することがで
きる。
（２）ベッド材搬送路を有しているので、脱硫剤の一部
をベッド材で置き換えることができ、脱硫剤の使用量を
低減し脱硫剤の有効利用率を高めることができる。
（３）既存の流動層ボイラのベッド材抜出管から抜き出
されたベッド材を搬送するベッド材搬送路を配設するだ
けの小規模な改良によって、脱硫剤の有効利用率を高め
ることができる。
（４）分岐弁を有しているので、ベッド材の循環量が増
加し燃焼排ガス中への飛散量が増加し適正な流動層高が
維持できなくなる場合には、分岐弁を作動させてベッド
材を系外に排出することができ操作性に優れる。As described above, the bed material circulating apparatus according to the first embodiment is configured, so that the following effects can be obtained. (1) It has a fuel adjusting device to which the bed material is supplied by the bed material conveying path, and the bed material is mixed with the fuel and supplied to the fluidized bed boiler. Therefore, the fuel is volatilized and generated immediately after the supply. The bed material can efficiently capture high-concentration SOx, the desulfurization rate can be improved, and the bed material can be effectively used as a desulfurizing agent. (2) Since the bed material transport path is provided, a part of the desulfurizing agent can be replaced with the bed material, the amount of the desulfurizing agent used can be reduced, and the effective utilization rate of the desulfurizing agent can be increased. (3) The effective utilization rate of the desulfurizing agent can be increased by a small-scale improvement in which a bed material conveying path for conveying the bed material extracted from the bed material extracting pipe of the existing fluidized bed boiler is provided. it can. (4) Since it has a branch valve, if the circulation amount of the bed material increases and the amount of scattering into the combustion exhaust gas increases and it becomes impossible to maintain an appropriate fluidized bed height, the branch valve is operated to operate the bed. The material can be discharged to the outside of the system and the operability is excellent.
【００１６】（実施の形態２）図２は実施の形態２にお
けるベッド材循環装置の要部構成図である。なお、実施
の形態１で説明したものと同様のものは、同じ符号を付
して説明は省略する。図中、１６は石炭等の固体燃料と
石灰石等の脱硫剤とベッド材搬送路１５から供給される
ベッド材とを混合する燃料調整装置としての燃料供給ホ
ッパ、１７は燃料供給ホッパ１６の下流に接続され加圧
流動層ボイラ２と略同じ圧力である０．６〜３．１ＭＰ
ａ程度の圧力で燃料供給ホッパ１６で混合された燃料等
を貯蔵するロックホッパ、１８はロックホッパ１７の下
流と加圧流動層ボイラ２内に配設されたスプレーノズル
（図示しない）とに接続されロックホッパ１７内に貯蔵
された燃料等を空気流によって搬送して流動層２ｂへ供
給する燃料供給路、なお、燃料供給ホッパ１６からロッ
クホッパ１７に燃料等を供給するときには、燃料供給ホ
ッパ１６の圧力をロックホッパ１７と略同一の圧力に加
圧した後に行われる。実施の形態２のベッド材循環装置
が実施の形態１と異なる点は、燃料スラリー調整装置の
代わりに燃料調整装置としての燃料供給ホッパ１６とロ
ックホッパ１７とを備えている点である。(Embodiment 2) FIG. 2 is a configuration diagram of a main part of a bed material circulating apparatus in Embodiment 2. The same components as those described in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In the figure, 16 is a fuel supply hopper as a fuel adjusting device for mixing a solid fuel such as coal, a desulfurizing agent such as limestone, and a bed material supplied from the bed material conveying path 15, and 17 is provided downstream of the fuel supply hopper 16. 0.6 to 3.1MP, which is connected and has substantially the same pressure as the pressurized fluidized bed boiler 2
A lock hopper 18 for storing the fuel mixed in the fuel supply hopper 16 at a pressure of about a is connected to a downstream of the lock hopper 17 and a spray nozzle (not shown) arranged in the pressurized fluidized bed boiler 2. The fuel supply path for supplying the fuel or the like stored in the lock hopper 17 by the air flow and supplying it to the fluidized bed 2b. When the fuel or the like is supplied from the fuel supply hopper 16 to the lock hopper 17, the fuel supply hopper 16 The pressure is applied to the lock hopper 17 to be substantially the same as that of the lock hopper 17. The bed material circulating device of the second embodiment is different from that of the first embodiment in that a fuel supply hopper 16 and a lock hopper 17 as a fuel adjusting device are provided instead of the fuel slurry adjusting device.
【００１７】以上のように実施の形態２のベッド材循環
装置は構成されているので、実施の形態１に記載の作用
に加え、以下のような作用が得られる。
（１）脱硫剤等をスラリー化せずに加圧流動層ボイラ内
に供給することができ、スラリーに含有される水が蒸発
するときの気化熱の損失がなく熱効率に優れる。Since the bed material circulating apparatus of the second embodiment is configured as described above, the following operation can be obtained in addition to the operation described in the first embodiment. (1) The desulfurizing agent and the like can be supplied into the pressurized fluidized bed boiler without being slurried, and there is no loss of vaporization heat when water contained in the slurry evaporates, and thermal efficiency is excellent.
【００１８】なお、実施の形態１及び２においては、加
圧系で用いられる加圧流動層ボイラの場合について説明
したが、本発明のベッド材循環装置及び流動層ボイラの
運転方法は、常圧系で用いられる流動層ボイラの場合で
も同様に用いることができる。In the first and second embodiments, the case of the pressurized fluidized bed boiler used in the pressurized system has been described, but the bed material circulating apparatus and the operating method of the fluidized bed boiler of the present invention are It can be similarly used in the case of a fluidized bed boiler used in the system.
【００１９】[0019]
【実施例】次に、本発明を実施例を用いて詳細に説明す
る。
（実験例）０．６〜３．１ＭＰａ、８００〜９５０℃で
燃焼運転させた３５０ＭＷ加圧流動層複合発電システム
の加圧流動層ボイラから得られたベッド材と、津久見産
の石灰石（粒子径が２ｍｍより小さなもの）と、ブレア
ゾール炭（粒子径６ｍｍ以下）と、を所定量混合したも
のをボートに入れ、そのボートを８００℃に加熱された
管状炉内に挿入した。管状炉の一端からは酸素濃度が７
０ｖｏｌ％に調整されたガスを流し（加圧流動層ボイラ
の条件を想定したもの）、他端から排出された燃焼ガス
中の硫黄酸化物濃度（ｍｇ／ｇ）を測定した。実験を行
ったベッド材と石灰石とブレアゾール炭との混合比、硫
黄酸化物濃度を（表１）に示す。なお、ブレアゾール炭
と石灰石（試料２乃至試料６についてはベッド材を含ん
だもの）との混合比は、Ｃａ／Ｓモル比が５になるよう
に選んだ。また、石灰石は、前処理として、ボートに入
れ、８００℃に加熱し一端からは酸素濃度が７０ｖｏｌ
％に調整されたガスを流した管状炉内にそのボートを入
れて１時間保持した。ベッド材が加圧流動層ボイラ内で
与えられたのに近い熱履歴を石灰石に与え、熱履歴の差
による炭酸カルシウムから酸化カルシウムへの熱分解の
有無が実験結果に与える影響を少なくするためである。EXAMPLES Next, the present invention will be described in detail with reference to examples. (Experimental example) Bed material obtained from a pressurized fluidized bed boiler of a 350 MW pressurized fluidized bed combined cycle power generation system that was burned at 0.6 to 3.1 MPa and 800 to 950 ° C, and limestone from Tsukumi (particle size Of less than 2 mm) and Blairazole charcoal (particle size 6 mm or less) were mixed in a predetermined amount into a boat, and the boat was inserted into a tubular furnace heated to 800 ° C. Oxygen concentration is 7 from one end of the tube furnace
A gas adjusted to 0 vol% was passed (assuming the conditions of a pressurized fluidized bed boiler), and the sulfur oxide concentration (mg / g) in the combustion gas discharged from the other end was measured. The mixing ratio of the bed material, the limestone, and the Blazeol charcoal used for the experiment, and the sulfur oxide concentration are shown in (Table 1). The mixing ratio of Blazeol charcoal and limestone (including the bed material in Samples 2 to 6) was selected so that the Ca / S molar ratio was 5. As a pretreatment, limestone was put in a boat and heated to 800 ° C., and the oxygen concentration was 70 vol from one end.
The boat was placed in a tubular furnace in which a gas adjusted to 100% was flowed and held for 1 hour. In order to reduce the effect of thermal decomposition of calcium carbonate to calcium oxide due to the difference in thermal history on the experimental results, the limestone is given a thermal history similar to that given by the bed material in the pressurized fluidized bed boiler. is there.
【表１】
（表１）から、石灰石を８〜７０ｗｔ％のベッド材に置
換した試料（試料２乃至試料６）は、石灰石にベッド材
を添加していない試料（試料１）と比較して、硫黄酸化
物濃度が約１０％に大幅に低減されることが確認され
た。これは、流動層ボイラの運転条件や圧力等にもよる
が、加圧流動層ボイラ内で脱硫剤が激しく流動されるこ
とによりベッド材の表面に微細な亀裂等が多数発生し比
表面積が増大し、ＳＯｘとの反応速度が向上したもので
あると推察される。以上の結果、本発明のベッド材循環
装置を用いることにより、脱硫剤の有効利用率を向上さ
せることができるのに加え、脱硫率を向上させることが
できることが確認された。[Table 1] From Table 1, the samples (Samples 2 to 6) in which the limestone is replaced with the bed material of 8 to 70 wt% are sulfur oxides as compared with the sample in which the bed material is not added to the limestone (Sample 1). It was confirmed that the concentration was significantly reduced to about 10%. This depends on the operating conditions and pressure of the fluidized bed boiler, but when the desulfurizing agent is violently flown in the pressurized fluidized bed boiler, numerous fine cracks etc. occur on the surface of the bed material and the specific surface area increases. However, it is presumed that the reaction rate with SOx is improved. From the above results, it was confirmed that by using the bed material circulating apparatus of the present invention, it is possible to improve the effective utilization rate of the desulfurizing agent and also to improve the desulfurization rate.
【００２０】（実施例１、比較例１）０．６〜３．１Ｍ
Ｐａ、８００〜９５０℃で燃焼運転させる３５０ＭＷ加
圧流動層複合発電システムにおいて、ブレアゾール炭
（粒子径６ｍｍ以下）と津久見産の石灰石（粒子径が５
ｍｍより小さなもの）と水とを混合した燃料スラリーに
ついて、石灰石の１〜５０ｗｔ％を加圧流動層ボイラか
ら抜き出したベッド材で置き換えたものを作成し、その
燃料スラリーを流動層ボイラ内に供給した。ブレアゾー
ル炭と、石灰石と一部を置換したベッド材とを合計した
ものとの配合比は、Ｃａ／Ｓモル比が５になるように調
整した。清浄ガス流路で清浄ガスの脱硫率を測定したと
ころ、９９％以上の脱硫率が得られた。一方、比較例の
ベッド材で置換しなかった場合（石灰石のみを用いた場
合）の脱硫率は９８％であった。以上の実施例１と比較
例１の結果から、本発明によれば、脱硫率を向上させる
ことができるとともに、脱硫剤の使用量の低減もできる
ことが明らかになった。(Example 1, Comparative Example 1) 0.6 to 3.1M
In a 350 MW pressurized fluidized bed combined cycle power generation system that burns at a temperature of 800 to 950 ° C. Pa, Blazeol charcoal (particle size 6 mm or less) and limestone from Tsukumi (particle size 5
a fuel slurry in which 1 to 50 wt% of limestone is replaced with bed material extracted from the pressurized fluidized bed boiler, and the fuel slurry is supplied into the fluidized bed boiler. did. The compounding ratio of the bleazole carbon and the total of the bed material partially replaced with limestone was adjusted so that the Ca / S molar ratio was 5. When the desulfurization rate of the clean gas was measured in the clean gas passage, a desulfurization rate of 99% or more was obtained. On the other hand, the desulfurization rate was 98% when the bed material of the comparative example was not substituted (when only limestone was used). From the results of Example 1 and Comparative Example 1 described above, it was revealed that according to the present invention, the desulfurization rate can be improved and the amount of desulfurization agent used can be reduced.
【００２１】なお、本実施例では石灰石や燃料等をペー
スト状にして加圧流動層ボイラに供給する湿式方式につ
いて説明したが、石灰石や燃料等を乾式供給する場合に
ついても同様の効果が得られる。さらに、乾式供給する
場合には、ペースト状にして供給された燃料等から水が
蒸発するときの気化熱の損失がなく熱効率を向上させる
ことができる。In the present embodiment, the wet method in which limestone, fuel, etc. are made into a paste and supplied to the pressurized fluidized bed boiler has been described, but the same effect can be obtained when dry supplying limestone, fuel, etc. . Furthermore, in the case of dry supply, there is no loss of heat of vaporization when water is evaporated from the fuel or the like supplied in paste form, and thermal efficiency can be improved.
【００２２】[0022]
【発明の効果】以上のように、本発明のベッド材循環装
置及び流動層ボイラの運転方法によれば、以下のような
有利な効果が得られる。請求項１に記載の発明によれ
ば、
（１）ベッド材搬送路によってベッド材が供給される燃
料調整装置を有しており、燃料に混合されてベッド材が
流動層ボイラに供給されるので、供給直後に燃料が揮発
して発生する高濃度のＳＯｘをベッド材が効率よく捕捉
することができ、脱硫率を向上させることができるとと
もに、ベッド材を脱硫剤として有効に利用することがで
きるベッド材循環装置を提供することができる。
（２）ベッド材搬送路を有しているので、脱硫剤の一部
をベッド材で置き換えることができ、脱硫剤の使用量を
低減し脱硫剤の有効利用率を高めることができるベッド
材循環装置を提供することができる。
（３）既存の流動層ボイラのベッド材抜出管から抜き出
されたベッド材を搬送するベッド材搬送路を配設するだ
けの小規模な改良によって、脱硫剤の有効利用率を高め
ることができるベッド材循環装置を提供することができ
る。As described above, according to the bed material circulating device and the method for operating the fluidized bed boiler of the present invention, the following advantageous effects are obtained. According to the invention as set forth in claim 1, (1) it has a fuel adjusting device in which the bed material is supplied by the bed material conveying path, and the bed material is mixed with the fuel and the bed material is supplied to the fluidized bed boiler. The bed material can efficiently capture high-concentration SOx generated by volatilization of the fuel immediately after the supply, the desulfurization rate can be improved, and the bed material can be effectively used as a desulfurizing agent. A bed material circulating device can be provided. (2) Since the bed material conveying path is provided, a part of the desulfurizing agent can be replaced with the bed material, and the amount of the desulfurizing agent used can be reduced and the effective utilization rate of the desulfurizing agent can be increased. A device can be provided. (3) The effective utilization rate of the desulfurizing agent can be increased by a small-scale improvement in which a bed material conveying path for conveying the bed material extracted from the bed material extracting pipe of the existing fluidized bed boiler is provided. It is possible to provide a bed material circulating device that can be used.
【００２３】請求項２に記載の発明によれば、
（１）抜き出されたベッド材を燃料調整装置に搬送・供
給するベッド材搬送工程を有しているので、燃料に混合
されてベッド材が流動層ボイラに供給され、供給直後に
燃料が揮発して発生する高濃度のＳＯｘをベッド材が効
率よく捕捉することができ、ベッド材を脱硫剤として有
効に利用することができる流動層ボイラの運転方法を提
供することができる。
（２）脱硫剤の一部をベッド材で置き換えることがで
き、脱硫剤の使用量を低減し脱硫剤の有効利用率を高め
ることができる流動層ボイラの運転方法を提供すること
ができる。According to the second aspect of the present invention, (1) the bed material conveying step of conveying and supplying the extracted bed material to the fuel adjusting device is included, so that the bed material is mixed with the fuel. Is supplied to a fluidized bed boiler, and the bed material can efficiently capture high-concentration SOx generated by volatilization of fuel immediately after the supply, and the bed material can be effectively used as a desulfurizing agent. The driving method can be provided. (2) A method for operating a fluidized bed boiler can be provided in which a part of the desulfurizing agent can be replaced with a bed material, the amount of the desulfurizing agent used can be reduced, and the effective utilization rate of the desulfurizing agent can be increased.
【図１】本実施の形態１におけるベッド材循環装置の要
部構成図FIG. 1 is a configuration diagram of main parts of a bed material circulating device according to a first embodiment.
【図２】本実施の形態２におけるベッド材循環装置の要
部構成図FIG. 2 is a configuration diagram of main parts of a bed material circulating device according to a second embodiment.
１ 圧力容器 ２ 加圧流動層ボイラ ２ａ 伝熱管 ２ｂ 流動層 ３ 燃焼排ガス流路 ４ １次脱塵装置 ５ １次脱塵ガス流路 ６ ２次脱塵装置 ７ 清浄ガス流路 ８ ガスタービン ９ 発電機 １０ コンプレッサ １１ 燃料スラリー調整装置 １２ スラリーポンプ １３ スラリー供給路 １４ ベッド材抜出管 １４ａ 分岐弁 １５ ベッド材搬送路 １６ 燃料供給ホッパ １７ ロックホッパ １８ 燃料供給路 1 pressure vessel 2 Pressurized fluidized bed boiler 2a heat transfer tube 2b fluidized bed 3 Combustion exhaust gas passage 4 Primary dust remover 5 Primary dust removal gas flow path 6 Secondary dust remover 7 Clean gas flow path 8 gas turbine 9 generator 10 compressor 11 Fuel slurry adjuster 12 Slurry pump 13 Slurry supply path 14 Bed material extraction pipe 14a Branch valve 15 Bed material transport path 16 Fuel supply hopper 17 Lock Hopper 18 Fuel supply path
Claims (2)
料を供給する燃料供給装置と、前記流動層ボイラの炉底
部に一端部が接続され前記炉底部に滞留したベッド材を
抜き出すベッド材抜出管と、前記ベッド材抜出管の他端
部に接続され前記燃料供給装置に前記ベッド材を搬送・
供給するベッド材搬送路と、を備えていることを特徴と
するベッド材循環装置。1. A fluidized bed boiler, a fuel supply device for supplying a fuel to the fluidized bed boiler, one end of which is connected to a furnace bottom of the fluidized bed boiler, and a bed material extraction for extracting bed material accumulated at the furnace bottom. The bed material is connected to the discharge pipe and the other end of the bed material discharge pipe to convey the bed material to the fuel supply device.
A bed material circulating device, comprising: a bed material conveying path for supplying the bed material.
ド材抜出管から前記炉底部に滞留したベッド材を抜き出
すベッド材抜出工程と、前記ベッド材抜出工程で抜き出
された前記ベッド材を前記流動層ボイラに燃料を供給す
る燃料供給装置に搬送・供給するベッド材搬送工程と、
を備えていることを特徴とする流動層ボイラの運転方
法。2. A bed material withdrawing step of withdrawing the bed material accumulated in the furnace bottom portion from a bed material withdrawing pipe connected to the furnace bottom portion of a fluidized bed boiler, and the step of extracting the bed material withdrawing in the bed material withdrawing step. A bed material carrying step of carrying and supplying bed material to a fuel supply device for supplying fuel to the fluidized bed boiler;
A method for operating a fluidized bed boiler, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001187407A JP4589570B2 (en) | 2001-06-20 | 2001-06-20 | Method of operating bed material circulation device and bed material circulation device of fluid increase boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001187407A JP4589570B2 (en) | 2001-06-20 | 2001-06-20 | Method of operating bed material circulation device and bed material circulation device of fluid increase boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003004206A true JP2003004206A (en) | 2003-01-08 |
| JP4589570B2 JP4589570B2 (en) | 2010-12-01 |
Family
ID=19026698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001187407A Expired - Fee Related JP4589570B2 (en) | 2001-06-20 | 2001-06-20 | Method of operating bed material circulation device and bed material circulation device of fluid increase boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4589570B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157473A (en) * | 2006-12-20 | 2008-07-10 | Chugoku Electric Power Co Inc:The | Pressure fluidized-bed hybrid power system and method of keeping constant layer height of pressure fluidized-bed boiler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55809A (en) * | 1978-06-14 | 1980-01-07 | Babcock Hitachi Kk | Desulfurizing agent regenerating tower outlet gas treating method |
| JPS6298916U (en) * | 1985-12-10 | 1987-06-24 | ||
| JPH0665709U (en) * | 1993-02-09 | 1994-09-16 | 石川島播磨重工業株式会社 | Pressurized fluidized bed boiler |
-
2001
- 2001-06-20 JP JP2001187407A patent/JP4589570B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55809A (en) * | 1978-06-14 | 1980-01-07 | Babcock Hitachi Kk | Desulfurizing agent regenerating tower outlet gas treating method |
| JPS6298916U (en) * | 1985-12-10 | 1987-06-24 | ||
| JPH0665709U (en) * | 1993-02-09 | 1994-09-16 | 石川島播磨重工業株式会社 | Pressurized fluidized bed boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157473A (en) * | 2006-12-20 | 2008-07-10 | Chugoku Electric Power Co Inc:The | Pressure fluidized-bed hybrid power system and method of keeping constant layer height of pressure fluidized-bed boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4589570B2 (en) | 2010-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2008316561B2 (en) | Method for supplying fuel to a gasification system | |
| US8992641B2 (en) | Fuel feed system for a gasifier | |
| WO2019237695A1 (en) | System and method for power generation in cement kiln with cooperative treatment for household waste | |
| US8695516B2 (en) | Pollution abatement process for fossil fuel-fired boilers | |
| EP2571601B1 (en) | Method of capturing sulfur oxides from the flue gas of an oxyfuel combustion cfb boiler | |
| JP4306334B2 (en) | Carbide processing method and apparatus | |
| CN103216823B (en) | The composite circulating fluidized bed optimization cleaning combustion technology of slime and system | |
| JP4589570B2 (en) | Method of operating bed material circulation device and bed material circulation device of fluid increase boiler | |
| CN103328072B (en) | For the wet scrubber of scrubbing CO_2 from process gas | |
| GB2095762A (en) | A combined cycle power plant | |
| JPH07506179A (en) | Method for maintaining the nominal operating temperature of flue gas in a PFBC power plant | |
| CN109486534A (en) | A kind of coal gas dust removal sulfur method | |
| JP4105864B2 (en) | Recycling method of fly ash in fluidized bed boiler. | |
| JP3831779B2 (en) | Supercritical water combustion power generation method and supercritical water combustion power generation system | |
| JP2003004205A (en) | Furnace bottom ash circulating device and method for operating fluidized bed boiler | |
| US8142528B2 (en) | Methods and systems of reducing viscosity of gasification system slag | |
| JP4783582B2 (en) | Asphalt plant using flammable gas generated from biomass | |
| JP2010008040A (en) | Sulfur content eliminating method and desulfurizer for fluidized bed apparatus | |
| JP2008170107A (en) | Oxide reducing method and oxide reducer for coal addition used in the same | |
| JP2002174406A (en) | Method of estimating wear rate of fluidized particle in pressurized fluidized bed incinerator and method of estimating size distribution of fluidized particle in the incinerator | |
| JP2008169338A (en) | Method of reducing unburned coal | |
| JP2002147726A (en) | Incinerator apparatus | |
| JP2004183948A (en) | Bed material recovering apparatus | |
| JP2004181320A (en) | Recovery equipment for particles of soot | |
| JP2009072732A (en) | Coal thermal power generating system and method for suppressing elution of chromium (vi) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080516 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090916 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20091001 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20091130 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100511 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100712 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100714 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20100817 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20100910 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130917 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130917 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130917 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130917 Year of fee payment: 3 |
|
| R157 | Certificate of patent or utility model (correction) |
Free format text: JAPANESE INTERMEDIATE CODE: R157 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |