JPH0756379B2 - Fuel dispersion supply system for fluidized bed boiler - Google Patents

Fuel dispersion supply system for fluidized bed boiler

Info

Publication number
JPH0756379B2
JPH0756379B2 JP1036097A JP3609789A JPH0756379B2 JP H0756379 B2 JPH0756379 B2 JP H0756379B2 JP 1036097 A JP1036097 A JP 1036097A JP 3609789 A JP3609789 A JP 3609789A JP H0756379 B2 JPH0756379 B2 JP H0756379B2
Authority
JP
Japan
Prior art keywords
combustion
spreader
fluidized bed
water content
residue
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
Application number
JP1036097A
Other languages
Japanese (ja)
Other versions
JPH02217712A (en
Inventor
三夫 笠井
忠明 樋口
哲雄 沖田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Corp
Original Assignee
Ube Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP1036097A priority Critical patent/JPH0756379B2/en
Publication of JPH02217712A publication Critical patent/JPH02217712A/en
Publication of JPH0756379B2 publication Critical patent/JPH0756379B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、コーヒー粕,みかん粕,ビール粕,茶粕,汚
泥などの高水分を含有した廃棄物用の高含水残渣物また
は石炭などを燃焼する場合に、流動床ボイラにおいて燃
焼ベッドに燃料を供給する流動床ボイラの燃料分散供給
装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a high water content residue such as coffee meal, tangerine meal, beer meal, tea meal, and sludge containing high water content, or coal. The present invention relates to a fuel dispersion supply device for a fluidized bed boiler that supplies fuel to a combustion bed in the fluidized bed boiler when burning.

[従来の技術] 従来より流動床燃焼ベッドに高含水残渣物を供給する場
合は、ケーシング内部に一定ピッチを有したスクリュ
を回転自在に装着したスラッジコンベアと、ケーシング
の内部に回転自在に装着されたロータの円周方向に一定
間隔をおいて放射状に配設されたロータを有したスプレ
ッダとの組合わせにより、まずスラッジコンベアから排
送された高含水残渣物を、次なるスプレッダを駆使して
燃焼ベッドの界面上に分散供給する方法と、高圧ポン
プにて排送された高含水残渣物を流動床側壁に設けた燃
料供給管先端のスラッジガンにより燃焼ベッドの界面上
に分散供給する方法などがある。
[Prior Art] Conventionally, when supplying a high water content residue to a fluidized bed combustion bed, a sludge conveyor in which a screw having a constant pitch is rotatably mounted inside a casing and a rotatably mounted inside the casing are installed. By combining with a spreader having rotors radially arranged at regular intervals in the circumferential direction of the rotor, the high water content residue discharged from the sludge conveyor is first used by the next spreader. Dispersion supply method on the interface of the combustion bed, high water content residue discharged by the high pressure pump, and dispersion supply method on the interface of the combustion bed by the sludge gun at the tip of the fuel supply pipe installed on the side wall of the fluidized bed. There is.

[発明が解決しようとする課題] ところが、前記したスラッジコンベアとスプレッドとの
組合わせによって高含水残渣物を流動床内部に供給しよ
うとすると、スラッジコンベアの回転軸方向とスプレッ
ダの回転軸方向とが直交しているために、スラッジコン
ベアの排出側から押出し排出された高含水残物は、その
ままではスプレッダのロータの回転軸方向に分散して均
等供給しにくく、さらに、高含水残渣物自身が粒径分布
巾をあまりもたず、かつ、自由含水率が高いため流動界
面にも均等に分散供給しにくい。このため、スプレッダ
から排出される高含水残渣物が集塊状態のまま流動界面
上に供給されて未燃分損失が増えやすいなどの欠点があ
った。
[Problems to be Solved by the Invention] However, when an attempt is made to supply a high water content residue inside a fluidized bed by a combination of the above sludge conveyor and spread, the rotation axis direction of the sludge conveyor and the rotation axis direction of the spreader are Because they are orthogonal, the high water content residue extruded and discharged from the discharge side of the sludge conveyor is difficult to disperse evenly in the direction of the rotation axis of the rotor of the spreader as it is. Since it does not have a wide diameter distribution and has a high free water content, it is difficult to evenly distribute and supply it to the flow interface. Therefore, there is a drawback that the high water content residue discharged from the spreader is supplied on the fluid interface in the agglomerated state and the unburned component loss is likely to increase.

また、前記の方法による高圧ポンプを利用してスラッ
ジガンによって高含水残渣物を燃焼ベッドの界面上に分
散供給すると、ポンプ動力が大きくなり、ランニングコ
ストが増加するなどの欠点を有していた。
Further, when the high water content residue is dispersedly supplied onto the interface of the combustion bed by the sludge gun using the high-pressure pump according to the above-mentioned method, the pump power is increased and the running cost is increased.

[課題を解決するための手段] このような問題点を解決するため、流動床側壁の1次燃
焼空間に取付けたスプレッダにおいて、スプレッダのロ
ータの外周に、正面外周端の先端の凸状部から根本の凹
状部までが鋸歯形状を有したブレードを前記ロータの円
周方向に所定のピッチで複数個設けるとともに、隣接す
る鋸歯形状のブレードを軸方向に位相をずらして設けた
構成にした。
[Means for Solving the Problem] In order to solve such a problem, in a spreader mounted in a primary combustion space of a fluidized-bed side wall, from the convex portion at the tip of the front outer peripheral end to the outer periphery of the rotor of the spreader. A plurality of blades having a sawtooth shape up to the concave portion of the root are provided at a predetermined pitch in the circumferential direction of the rotor, and adjacent sawtooth blades are provided with a phase shift in the axial direction.

[作用] 本発明は、ビール粕,コーヒー粕および汚泥のような高
含水残渣物をスプレッダで流動床ベッドへ分散供給する
ことができる燃焼分散供給装置を提供しようとするもの
である。
[Operation] The present invention is intended to provide a combustion dispersion supply device capable of dispersing and supplying high water content residues such as beer lees, coffee lees and sludge to a fluidized bed with a spreader.

まず、横方向に長い排出口を有した燃料供給管の先端か
らスプレッダのロータ軸方向に亘り均等に分散供給され
た高含水残渣物を、ロータに鋸歯形状のブレードを軸着
したスプレッダに供給した場合、ブレードがロータの半
径方向に高低を有した形状を呈しているため、それに伴
なってブレード先端近傍に沿って周速度は異なり、か
つ、ロータの回転数が一定以上になると、燃料供給管か
らスプレッダに供給された高含水残渣物は、ブレードの
先端近傍にのみ衝突する。このため、ブレード先端の鋸
歯形状の山部は周速度が大きく、逆に、凹凸状の谷部は
周速度が小さく、さらに、鋸歯形状に沿って山部から谷
部に行くにしたがって周速度は自然に連続的に変化して
いるため、この周速度の違いによって高含水残渣物の放
出到達距離が異なり、流動界面上へ効率よく均等に分散
供給される。
First, the high water content residue, which was evenly distributed and supplied from the tip of the fuel supply pipe having a long discharge port in the lateral direction along the rotor axial direction of the spreader, was supplied to the spreader in which the saw-toothed blade was axially mounted on the rotor. In this case, since the blade has a shape having heights in the radial direction of the rotor, the peripheral speed varies accordingly along the vicinity of the blade tip, and if the rotational speed of the rotor exceeds a certain value, the fuel supply pipe The high water content residue supplied from the to the spreader collides only with the vicinity of the tip of the blade. Therefore, the peripheral speed of the saw-tooth shaped crests of the blade tip is high, and conversely, the peripheral speed of the concavo-convex valleys is small, and further, the peripheral speed increases from the crests to the troughs along the saw-tooth shape. Since it naturally changes continuously, the discharge reaching distance of the high water content residue varies depending on the difference in the peripheral velocity, and the highly water-containing residue is efficiently and uniformly dispersed and supplied onto the fluid interface.

[実施例] つぎに、本発明の1実施例を図面により説明する。図面
はいずれも本発明の実施例を示すものであり、第1図は
流動床ボイラの全体的な構成を示す概略的な断面図、第
2図は第1図のII−II方向矢視図を示す。
[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. Each of the drawings shows an embodiment of the present invention. Fig. 1 is a schematic sectional view showing the overall structure of a fluidized bed boiler, and Fig. 2 is a view taken in the direction of arrows II-II in Fig. 1. Indicates.

第1図および第2図を用いて本装置の構成について述べ
る。
The configuration of this device will be described with reference to FIGS. 1 and 2.

第1図に示す装置は、流動床ボイラ1、最下段の空気室
2、その上段の1次燃焼室3、さらにその上段の2次燃
焼室4、空気導入パイプ5,5a、仕切板6,6a、流動熱媒体
8,9、助燃用バーナ10、燃焼用兼流動化用空気導入口1
1、水冷管13,13a、空気箱40、燃料供給管43、および、
スプレッダ47から構成される。
The apparatus shown in FIG. 1 includes a fluidized bed boiler 1, a lowermost air chamber 2, an upper primary combustion chamber 3, an upper secondary combustion chamber 4, air introduction pipes 5, 5a, partition plates 6, 6a, fluid heat medium
8,9, burner 10 for auxiliary combustion, air inlet 1 for combustion and fluidization
1, water cooling pipes 13, 13a, air box 40, fuel supply pipe 43, and
It consists of a spreader 47.

すなわち、この実施例では多段ベッドとして2段のベッ
ドが設けられている。
That is, in this embodiment, a two-tiered bed is provided as the multi-tiered bed.

ここで、高含水残渣物を燃焼する場合について説明す
る。
Here, the case of burning a high water content residue will be described.

空気室2の側方には、水平方向内側に向かっている助燃
用のバーナ10が設けられており、重油またはガス燃料を
燃焼させることによって1次燃焼室3にスプレッダ47に
よって1次燃焼ベッド20に供給された高含水残渣物30の
乾燥,燃焼を助けるとともに1次燃焼室3内を所望の温
度に保つことが可能である。11は燃焼用兼流動化用空気
の導入口であり、流動用頂部出口35から排出された排ガ
スを用いて図示しない熱交換器で加熱した後、空気室2
内の適量の空気を供給できるようにした。
A burner 10 for auxiliary combustion, which is directed inward in the horizontal direction, is provided on the side of the air chamber 2, and burners heavy oil or gas fuel into the primary combustion chamber 3 by a spreader 47 to the primary combustion bed 20. It is possible to assist the drying and combustion of the high water content residue 30 supplied to the fuel cell and to keep the inside of the primary combustion chamber 3 at a desired temperature. Reference numeral 11 denotes an inlet for combustion and fluidizing air, which is heated by an unillustrated heat exchanger using the exhaust gas discharged from the fluidizing top outlet 35, and then the air chamber 2
It was made possible to supply an appropriate amount of air inside.

1次燃焼室3は、例えば平均粒径が0.6mm程度の一般的
な砂からなる流動熱媒体8が入っている1次燃焼ベッド
20と、その上方の1次燃焼空間21からなり、空気室2
と、空気室2のすぐ上にある1次燃焼室3との間には、
垂直方向に多数の空気導入パイプ5を貫通して配設され
た水平な仕切板6が設けられており、仕切板6の上部
(1次燃焼室側)と下部(空気室側)にはキャスタブル
12を仕切板6内に設けた水冷管13を埋設する形で打設
し、同様に2次燃焼室4も1次燃焼室同様に仕切板6aの
上部と下部にはキャスタブル12aを打設した。流動床側
壁の1次燃焼空間21部にスプレッダ47,空気箱40および
燃料供給管43から成る燃料分散供給装置を配設した。燃
焼分散供給装置27は、空気箱40,燃料供給管43,スプレッ
ダ47から構成される。図示しない低圧ポンプから送られ
た高含水残渣物30は、先端が矩形状を有した燃料供給管
43からスプレッダ47へ均等に供給され、ロータ44円周上
に等ピッチで、かつ、ロータ44軸方向に少しづつずらせ
て固設された鋸歯形状を有したブレード45によって撤布
距離を調整しながら流動界面上に供給される。このよう
に、隣接する鋸歯形状のブレードを、ロータ44軸方向に
少しづつずらせたことによって、ロータ44の回転方向に
対してもブレード45形状による変化が生じるため、高含
水残渣物30のスプレッダ47の供給による自由度がさらに
増える。なお、ロータ44は可変速度式になっており、ロ
ータ44の回転数によってブレード45から投燃されて流動
界面上に到達する燃料の放出到達距離を燃料の種類によ
って調整することができる構造となっている。また、特
に、スプレッダ47によって高含水残渣物30を流動界面上
に投燃する場合、一部の高含水残渣物30がスプレッダ47
のすぐ近傍、すなわち、1次燃焼室3の側壁とスプレッ
ダ47間のデッドスペース上に落下し、これが付着,堆積
されてスプレッダ47から連続して流動界面上への投燃を
妨害されるのを防止するため前記デッドスペースの個所
に空気吹出し用のスリットまたは多孔板を有した空気箱
40を設け、連続的に空気をスリットまたは多孔板より噴
出させて高含水残渣物30の付着および付着による堆積を
防止するように構成してある。こうして、スプレッダ47
から流動界面上に分散供給された高含水残渣物30は流動
熱媒体8と混り合う。そして、空気室2から供給される
空気の作用によって流動化した状態で乾燥,燃焼され
る。ここで、32は各空気導入パイプ5の上部に設けたキ
ャップを示す。
The primary combustion chamber 3 contains, for example, a fluidized heat transfer medium 8 made of general sand having an average particle size of about 0.6 mm.
20 and the primary combustion space 21 above it, and the air chamber 2
Between the primary combustion chamber 3 which is immediately above the air chamber 2 and
A horizontal partition plate 6 is provided vertically extending through a number of air introduction pipes 5, and the upper part (primary combustion chamber side) and the lower part (air chamber side) of the partition plate 6 are castable.
The water-cooled pipes 13 provided in the partition plate 6 are embedded in the partition 12, and the castables 12a are also installed in the upper and lower parts of the partition plate 6a in the secondary combustion chamber 4 similarly to the primary combustion chamber. . A fuel dispersion supply device including a spreader 47, an air box 40 and a fuel supply pipe 43 was arranged in the primary combustion space 21 on the side wall of the fluidized bed. The combustion dispersion supply device 27 includes an air box 40, a fuel supply pipe 43, and a spreader 47. A high water content residue 30 sent from a low pressure pump (not shown) is a fuel supply pipe having a rectangular tip.
While being uniformly supplied from the 43 to the spreader 47, the blade 45 having a saw-tooth shape fixed at a constant pitch on the circumference of the rotor 44 in the axial direction of the rotor 44 is fixed while adjusting the removal distance. Supplied on the fluid interface. In this way, the adjacent saw-teeth-shaped blades are slightly shifted in the axial direction of the rotor 44, so that the shape of the blades 45 also changes in the rotational direction of the rotor 44. The degree of freedom by the supply of Note that the rotor 44 is of a variable speed type, and has a structure in which the release reaching distance of fuel that is injected from the blade 45 and reaches the flow interface by the rotation speed of the rotor 44 can be adjusted depending on the type of fuel. ing. Further, in particular, when the high water content residue 30 is burned on the flow interface by the spreader 47, a part of the high water content residue 30 is spread by the spreader 47.
In the immediate vicinity, that is, on the dead space between the side wall of the primary combustion chamber 3 and the spreader 47, it is adhered and deposited to prevent the spreader 47 from continuously injecting fuel onto the fluid interface. Air box with slits or perforated plates for blowing air in the dead space to prevent
40 is provided, and air is continuously ejected from the slit or the perforated plate to prevent adhesion of the highly water-containing residue 30 and accumulation due to the adhesion. Thus, spreader 47
The highly water-containing residue 30 dispersedly supplied from above on the fluid interface is mixed with the fluid heat medium 8. Then, it is dried and burned in a fluidized state by the action of the air supplied from the air chamber 2. Here, 32 indicates a cap provided on the upper part of each air introduction pipe 5.

1次燃焼室3に流動熱媒体8として砂を用いたのは、砂
は、ある大きな熱容量を持っているので、高含水残渣物
30を燃焼ベッド20内に入れても、燃焼ベッド20の温度を
容易に維持できるからであり、かつ、流動化状態ではそ
の撹拌効果により残渣物30を均一に分散させるととも
に、燃焼して生じた灰をかき落とし、酸素との接触効率
を良くするので、燃焼を良くする作用効果を有するから
である。
Sand was used as the fluidized heat medium 8 in the primary combustion chamber 3 because the sand has a certain large heat capacity, and therefore the high water content residue
This is because even if 30 is put in the combustion bed 20, the temperature of the combustion bed 20 can be easily maintained, and in the fluidized state, the residue 30 is uniformly dispersed due to its stirring effect, and it is generated by combustion. This is because the ash is scraped off and the efficiency of contact with oxygen is improved, which has the effect of improving combustion.

1次燃焼室3の1次燃焼空間21や1次燃焼ベッド20内に
は、温度検知器31が適宜本数設けられており、検知した
温度を計測し、計測された信号で供給する助燃料を適宜
制御して、1次燃焼室3内の温度や燃焼状態を常に所望
の状態に保ちうるようにした。
An appropriate number of temperature detectors 31 are provided in the primary combustion space 21 of the primary combustion chamber 3 and the primary combustion bed 20, and the auxiliary fuel supplied by measuring the detected temperature and supplying the measured signal is supplied. The temperature and the combustion state in the primary combustion chamber 3 can be maintained at a desired state by controlling appropriately.

1次燃焼室3と、1次燃焼室3のすぐ上にある2次燃焼
室4との間には、垂直方向に貫通した多数本の空気導入
パイプ5aや内部に水冷管13aを有する仕切板6aが設けら
れている。ただし、空気導入パイプ5aでは、下段の燃焼
ガスが上昇して通過するだけでなく、1次燃焼室3で燃
焼途中の残渣物30の一部を2次燃焼室4内に導入する。
Between the primary combustion chamber 3 and the secondary combustion chamber 4 immediately above the primary combustion chamber 3, a partition plate having a large number of vertically extending air introduction pipes 5a and a water cooling pipe 13a therein. 6a is provided. However, in the air introduction pipe 5a, not only the combustion gas in the lower stage rises and passes, but also a part of the residue 30 during combustion in the primary combustion chamber 3 is introduced into the secondary combustion chamber 4.

上段の2次燃焼室4において、33は各空気導入パイプ5a
の上部に設けたキャップ、22は砂などの流動熱媒体9を
有する2次燃焼ベッド、23は上方の2次燃焼空間であ
る。
In the upper secondary combustion chamber 4, 33 is each air introduction pipe 5a
, 22 is a secondary combustion bed having a fluidized heat medium 9 such as sand, and 23 is an upper secondary combustion space.

図示しない循環ポンプを経由して導入された循環水は、
循環水配管途中から2方向に分岐し、一方の水路は1次
燃焼室3の仕切板6に配設された水冷管13を通る間に加
熱された循環水と、他方、2次燃焼室4の仕切板6aに配
設された水冷管13aを通る間に加熱された循環水は最終
的には図示しないスチームドラムに送られる。
Circulating water introduced via a circulation pump (not shown)
The circulating water pipe branches into two directions, one of the water passages is heated while passing through a water cooling pipe 13 provided in a partition plate 6 of the primary combustion chamber 3, and the other is the secondary combustion chamber 4 The circulating water heated while passing through the water cooling pipe 13a arranged on the partition plate 6a is finally sent to a steam drum (not shown).

つぎに、本発明の実施例の作動を説明する。Next, the operation of the embodiment of the present invention will be described.

1次燃焼室3と2次燃焼室4内にそれぞれ一般的な砂な
どの流動熱媒体8,9を入れておく。つぎに、下方の助燃
用のバーナ10を点火し、燃焼用兼流動化用空気導入口11
より燃焼用兼空気流動化用空気を供給し、さらに、流動
熱媒体8および9をそれぞれ流動させ、1次燃焼ベッド
20および2次燃焼ベッド22を形成させておく。
Into the primary combustion chamber 3 and the secondary combustion chamber 4, respectively, fluid heat mediums 8 and 9 such as general sand are put. Next, the auxiliary combustion burner 10 below is ignited, and the combustion and fluidizing air inlet 11
More combustion and air fluidizing air is supplied, and the fluidizing heat media 8 and 9 are made to flow, respectively, to cause the primary combustion bed.
20 and the secondary combustion bed 22 are formed.

そして、1次燃焼ベッド20内に、図示しない比較的低圧
のポンプを駆動して燃料供給管43を通って燃料供給管43
の先端のノズル部46からスプレッダ47上に高含水残渣物
30が供給されるとスプレッダ47の駆動によるブレード45
の周速度によって1次燃焼ベッド20内に均等に分散供給
し、燃焼させる。
Then, a relatively low-pressure pump (not shown) is driven in the primary combustion bed 20 to pass through the fuel supply pipe 43 and the fuel supply pipe 43.
High water content residue on the spreader 47 from the nozzle 46 at the tip of the
Blades 45 driven by spreader 47 when 30 is supplied
Is uniformly distributed and supplied into the primary combustion bed 20 according to the peripheral velocity of the above, and burned.

ここで、高含水残渣物30とは、例えば60%以上の水分を
含んでいるものを言い、例えば、前記した残渣物30にお
ける通常の含水率は、コーヒー粕では約60〜70%、みか
ん粕,ビール粕,ウーロン茶粕では約70〜90%、汚泥で
は約70〜80%である。
Here, the high-moisture content residue 30 means, for example, one containing 60% or more of water, and, for example, the normal water content in the residue 30 described above is about 60 to 70% for coffee meal and tangerine meal. , Beer lees and oolong tea lees are about 70 to 90%, and sludge is about 70 to 80%.

1次燃焼ベッド20では、助燃用バーナ10の作用と残渣物
30自体の燃焼熱で乾燥後、燃焼させる。1次燃焼ベッド
20で残渣物30の乾燥と燃焼を同時に行なうためには、こ
この温度を約800〜900℃に保持しておく。
In the primary combustion bed 20, the action and residue of the burner 10 for auxiliary combustion
30 It burns after being dried by the heat of combustion of itself. Primary combustion bed
In order to simultaneously dry and burn the residue 30 at 20, the temperature here is kept at about 800-900 ° C.

本発明装置では、1次燃焼ベッド20では、高含水残渣物
30は乾燥した後、例えば約60%だけ燃焼する。そして、
1次燃焼空間21でも例えば約10%だけ燃焼し、1次燃焼
室3で完全燃焼されずに未燃分を例えば約30%有する小
片の残渣物30は上段の2次燃焼室4内に送り込まれる。
In the device of the present invention, in the primary combustion bed 20, high water content residue
After drying, 30 burns, for example, only about 60%. And
In the primary combustion space 21, for example, only about 10% is combusted, and not completely combusted in the primary combustion chamber 3, but a small-sized residue 30 having an unburned content of, for example, about 30% is fed into the upper secondary combustion chamber 4. Be done.

そして、2次燃焼室4の2次燃焼ベッド22と2次燃焼空
間23で残渣物30の残りの燃焼が引続いて行なわれ、ここ
で完全燃焼される。なお、1次燃焼室3で高含水残渣物
30を100%近く燃焼させようとすれば、燃焼後の廃ガス
の排出流速は、本発明の場合の例えば4分の1のように
遅くする必要があり、その分流動床2の面積も大きくす
る必要があり、装置全体を大きくする必要がある。ま
た、遅い流速で流動化する特殊な流動熱媒体を探す必要
がある。
Then, the remaining combustion of the residue 30 continues in the secondary combustion bed 22 and the secondary combustion space 23 of the secondary combustion chamber 4, where it is completely combusted. It should be noted that high water content residue in the primary combustion chamber 3
If 30 is to be burned up to nearly 100%, the exhaust gas discharge flow velocity after combustion needs to be slowed down to, for example, 1/4 in the case of the present invention, and the area of the fluidized bed 2 is also large accordingly. It is necessary to increase the size of the entire device. In addition, it is necessary to find a special fluid heat medium that fluidizes at a low flow rate.

本発明のようにコンパクトな装置を用い、1次燃焼室3
で高含水残渣物30を乾燥させて約70%だけ燃焼させただ
けでは、未燃分が多く出て燃焼効率が落ちるが、本発明
では、引続いて、2次燃焼室3で残りの燃焼を行なわせ
て完全燃焼されるので、燃焼効率が非常に良い。そのう
え、本装置では2次燃焼室4で完全燃焼されるので、未
燃分の発生が非常に少なく、残渣物30が成分として含ん
でいる灰分に近い量しか出てこない。
Using a compact device as in the present invention, the primary combustion chamber 3
However, if the high water content residue 30 is dried and burned by about 70%, a large amount of unburned matter is produced and the combustion efficiency is reduced. However, in the present invention, the remaining combustion is continued in the secondary combustion chamber 3. The combustion efficiency is very good because it is completely burned. Moreover, in this device, since the secondary combustion chamber 4 is completely combusted, the amount of unburned matter generated is very small, and only the amount of ash contained in the residue 30 as a component comes out.

そして、2次燃焼室4までで残渣物30が完全に燃焼され
た後、その燃焼排ガスは流動床頂部出口35から排出され
て廃熱ボイラに到達する。一方、循環ポンプで送出され
た循環水は、1次燃焼室3と2次燃焼室4の仕切板6お
よび6aを冷却した後1次燃焼ベッド20内に配設された水
冷管13,13aで燃焼排ガスと熱交換して予熱され、最後に
廃熱ボイラへ供給される。こうして、廃熱ボイラでは流
動床頂部出口35から排出された燃焼排ガスと各水冷管を
経由して送水されたスチームまじりの飽和水との熱交換
が行われた低圧スチームとして有効的に回収することが
できる。
Then, after the residue 30 is completely burned up to the secondary combustion chamber 4, the combustion exhaust gas is discharged from the fluidized bed top outlet 35 and reaches the waste heat boiler. On the other hand, the circulating water sent out by the circulation pump is cooled by the partition plates 6 and 6a of the primary combustion chamber 3 and the secondary combustion chamber 4 and then is cooled by the water cooling pipes 13 and 13a arranged in the primary combustion bed 20. It is preheated by exchanging heat with the flue gas and finally supplied to the waste heat boiler. In this way, in the waste heat boiler, the combustion exhaust gas discharged from the fluidized bed top outlet 35 and the steam-saturated water sent through each water cooling pipe are effectively exchanged as low-pressure steam that has undergone heat exchange. You can

以上の実施例は燃焼ベッドと燃焼空間を有する燃焼室を
1次,2次と2段設けた場合を説明したが、より燃焼しに
くい高含水残渣物を用いる場合などにおいては、さらに
これを3段、あるいはそれ以上の段の残渣物を燃焼させ
る流動床を設けた多段の燃焼装置とする。
In the above-mentioned embodiment, the case where the combustion chamber having the combustion bed and the combustion space is provided in the first, second and second stages is described. However, in the case of using a high water content residue that is more difficult to burn, A multi-stage combustion apparatus provided with a fluidized bed for combusting the residues of stages or more stages.

また、本発明のスプレッダ47によれば、ロータ44の回転
数を変化させることによって、従来のスプレッダと同様
に高含水残渣物30などの燃料の初速度を決定でき、回転
数を高くする程、鋸歯状ブレード45の特性によって前記
燃料の到達水平距離を大きくでき、より均等に分散供給
可能である。また、鋸歯のピッチについては供給される
ものの物性により決定される。すなわち、前記した鋸歯
状ブレード45の山の数は、水分が高い場合、すなわち、
内部摩擦角の大きいものは山のピッチの大きいものを、
逆に、水分が低い場合、すなわち、内部摩擦角の小さい
ものは山のピッチの小さいものを有したロータ44を交換
するだけでよく、燃料の種類によっても容易に対処でき
る。さらに、同一形状で、かつ、隣接するブレード45を
ロータ44の軸方向に少しづつずらせたためロータ44の回
転方向に高含水残渣物30の投燃による変化も加味される
ことになり、高含水残渣物30の放出到達距離の調整も容
易になった。
Further, according to the spreader 47 of the present invention, by changing the rotation speed of the rotor 44, the initial speed of the fuel such as the high water content residue 30 can be determined similarly to the conventional spreader, and the higher the rotation speed, Due to the characteristics of the serrated blade 45, the horizontal distance that the fuel reaches can be increased and the fuel can be more evenly distributed and supplied. Further, the saw tooth pitch is determined by the physical properties of the supplied material. That is, the number of ridges of the sawtooth blade 45 described above, when the water content is high, that is,
Those with a large internal friction angle have a large mountain pitch,
On the contrary, when the water content is low, that is, when the internal friction angle is small, only the rotor 44 having the small pitch of the peaks needs to be replaced, and it can be easily dealt with depending on the kind of fuel. Furthermore, since the adjacent blades 45 having the same shape are slightly shifted in the axial direction of the rotor 44, the change due to the combustion of the high water content residue 30 in the rotation direction of the rotor 44 is also added, and the high water content residue It became easier to adjust the discharge reach of the object 30.

こうして、本発明における実施例では、高含水残渣物30
のような分散供給しにくいものも流動界面上に分散して
供給することが容易であるため、その分十分に乾燥,燃
焼されることになり燃焼効率が上がる。
Thus, in the embodiment of the present invention, the high water content residue 30
Since it is easy to disperse and supply such a material that is difficult to be dispersed and supplied on the fluid interface, the material is sufficiently dried and burned, and the combustion efficiency is increased.

[発明の効果] 本発明の燃焼分散供給装置において、スプレッダのロー
タに軸着したブレードを鋸歯状にしたため、鋸歯形状に
沿って谷部から山部への移動するにしたがって周速度は
次第に大きくなり、高含水残渣物や石炭のような固形燃
料の流動界面への投燃による均等分散供給が容易となっ
た。また、さらに投燃の自由度を高めるために、隣接す
るプブレードをロータ44の軸方向に少しづつずらせて軸
着したり、また、スプレッダのロータの回転を可変速に
したり、鋸歯のピッチを変えることによって、燃料の種
類に応じて流動界面上へ均等分散供給することが可能で
ある。
[Advantages of the Invention] In the combustion dispersion supply device of the present invention, since the blade axially attached to the rotor of the spreader has a sawtooth shape, the peripheral speed gradually increases as the blade moves from the valley to the peak along the sawtooth shape. , It became easy to evenly disperse and supply high-moisture residue and solid fuel such as coal to the fluid interface by injecting fuel. Further, in order to further increase the degree of freedom of fuel injection, the adjacent blades are attached to the rotor 44 by slightly shifting them in the axial direction, the speed of the rotor of the spreader is made variable, and the pitch of the saw teeth is changed. As a result, it is possible to uniformly distribute and supply the fuel onto the fluid interface according to the type of fuel.

【図面の簡単な説明】[Brief description of drawings]

図面はいずれも本発明の1実施例を示すものであり、第
1図は流動床ボイラの全体的な構成を示す概略的な断面
図、第2図は第1図のII−II方向矢視図を示す。 1……流動床ボイラ、2……空気室、 3……1次燃焼室、4……2次燃焼室、 5,5a……空気導入パイプ、 6,6a……仕切板、8,9……流動熱媒体、 10……助燃用バーナ、 11……燃焼用兼流動化用空気導入口、 13,13a……水冷管、 27……燃焼分散供給装置、 40……空気箱、46……燃料供給管、 47……スプレッダ。
Each of the drawings shows one embodiment of the present invention. Fig. 1 is a schematic sectional view showing the overall structure of a fluidized bed boiler, and Fig. 2 is a view taken in the direction of arrows II-II in Fig. 1. The figure is shown. 1 ... Fluidized bed boiler, 2 ... Air chamber, 3 ... Primary combustion chamber, 4 ... Secondary combustion chamber, 5,5a ... Air introduction pipe, 6,6a ... Partition plate, 8, 9 ... … Fluid heat medium, 10 …… Auxiliary burner, 11 …… Combustion and fluidizing air inlet, 13,13a …… Water cooling pipe, 27 …… Combustion dispersion supply device, 40 …… Air box, 46 …… Fuel supply pipe, 47 ... Spreader.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】流動床側壁の1次燃焼空間に取付けたスプ
レッダにおいて、スプレッダのロータの外周に、正面外
周端の先端の凸状部から根本の凹状部までが鋸歯形状を
有したブレードを前記ロータの円周方向に所定のピッチ
で複数個設けるとともに、隣接する鋸歯形状のブレード
を軸方向に位相をずらして設けたことを特徴とする流動
床ボイラの燃料分散供給装置。
1. A spreader mounted in a primary combustion space on a side wall of a fluidized bed, wherein a blade having a sawtooth shape is formed on the outer periphery of a rotor of the spreader from a convex portion at a tip of a front outer peripheral end to a concave portion at a root. A fuel dispersion and supply device for a fluidized bed boiler, wherein a plurality of blades are provided in a circumferential direction of a rotor at a predetermined pitch, and adjacent saw-teeth shaped blades are axially shifted in phase.
JP1036097A 1989-02-17 1989-02-17 Fuel dispersion supply system for fluidized bed boiler Expired - Lifetime JPH0756379B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1036097A JPH0756379B2 (en) 1989-02-17 1989-02-17 Fuel dispersion supply system for fluidized bed boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1036097A JPH0756379B2 (en) 1989-02-17 1989-02-17 Fuel dispersion supply system for fluidized bed boiler

Publications (2)

Publication Number Publication Date
JPH02217712A JPH02217712A (en) 1990-08-30
JPH0756379B2 true JPH0756379B2 (en) 1995-06-14

Family

ID=12460264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1036097A Expired - Lifetime JPH0756379B2 (en) 1989-02-17 1989-02-17 Fuel dispersion supply system for fluidized bed boiler

Country Status (1)

Country Link
JP (1) JPH0756379B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5916430B2 (en) * 2012-02-21 2016-05-11 三菱重工業株式会社 Fluidized bed drying apparatus, combined gasification power generation facility, and method for supplying pulverized fuel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2545740Y2 (en) * 1991-07-16 1997-08-27 株式会社タダノ Mobile crane counterweight attachment / detachment device

Also Published As

Publication number Publication date
JPH02217712A (en) 1990-08-30

Similar Documents

Publication Publication Date Title
US4114289A (en) Dryer system
US4646637A (en) Method and apparatus for fluidized bed combustion
CA2628251C (en) Particulate waste product gasification system and method
PT1869307E (en) Integrated biomass energy system
CN103542415A (en) Smoke pyrolysis kiln-furnace-combined type sludge incinerator
RU2435102C1 (en) Utilisation system of wet carbon-containing waste
JP2013224810A5 (en)
KR20120016967A (en) Combustion apparatus with improved combustion efficiency
JPH0756379B2 (en) Fuel dispersion supply system for fluidized bed boiler
JPH0756378B2 (en) Fuel dispersion supply system for fluidized bed boiler
US4326470A (en) Individual bagasse drier
KR101557870B1 (en) Combustion apparatus having clinker-removing device
JPH0792223B2 (en) Fuel dispersion supply system for fluidized bed boiler
JPH0792222B2 (en) Fuel dispersion supply system for fluidized bed boiler
AU638745B2 (en) High turndown rotary dryer flights
CN212222785U (en) Sludge drying device
RU2552009C1 (en) Mechanised grate-fired furnace
JP2613465B2 (en) Fluid bed boiler fuel supply system
JP3140180B2 (en) boiler
JP2567690B2 (en) Fluid bed boiler fuel supply system
RU2244873C2 (en) Furnace for burning wood wastes in fluidized bed
US4889060A (en) Web for rotary combustor
SU1135968A1 (en) Incinerator
CN111439911A (en) Sludge drying device
JPH0861852A (en) Sludge drying device