JPH0424250Y2 - - Google Patents
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- Publication number
- JPH0424250Y2 JPH0424250Y2 JP13629786U JP13629786U JPH0424250Y2 JP H0424250 Y2 JPH0424250 Y2 JP H0424250Y2 JP 13629786 U JP13629786 U JP 13629786U JP 13629786 U JP13629786 U JP 13629786U JP H0424250 Y2 JPH0424250 Y2 JP H0424250Y2
- Authority
- JP
- Japan
- Prior art keywords
- mixture
- rich
- nozzle
- air
- rich mixture
- 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
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- 239000000203 mixture Substances 0.000 claims description 129
- 239000000446 fuel Substances 0.000 claims description 31
- 239000007789 gas Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 239000004449 solid propellant Substances 0.000 description 13
- 239000000843 powder Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
ボイラ、化学工業炉等に利用されていて、微粉
固体燃料を燃焼させる装置に関する。[Detailed description of the invention] [Industrial application field] This invention is used in boilers, chemical industrial furnaces, etc., and relates to a device for burning pulverized solid fuel.
従来の装置の概要を第３図により説明する。 An outline of the conventional device will be explained with reference to FIG.
サイクロン式の分離器１の上方に接線方向に伸
びた供給管８が連結され、分離器１の頂部を貫通
して分離器１の中心軸部に上下に伸びて配置さ
れ、上部でＵ字状に折れ曲つた淡混合気排出管２
が設けられている。分離器１の下方の出口には濃
混合気排出管９が連結されている。炉１２の天井
部には濃混合気風箱１３，淡混合気風箱１４、及
び二次空気風箱１５が取付けられている。濃混合
気風箱１３内には、濃混合気排出管９の下端開口
を取囲み、炉１２内に向つて開口した濃混合気ノ
ズル４が設けられている。淡混合気風箱１４内に
は、淡混合気排出管２の出口側開口を取囲み、炉
１２内に向つて開口した淡混合気ノズル５が設け
られている。二次空気風箱１５の上部壁を貫通し
て二次空気ダクト３が配置され、二次空気風箱１
５内には、二次空気ダクトの下端開口を取囲み、
炉１２内に向つて開口した二次空気ノズル６が設
けられている。なお、淡混合気排出管２の途中に
は例えば流量調整弁等のような淡混合気排出量調
節器７が配置されている。 A supply pipe 8 extending tangentially is connected above the cyclone type separator 1, passes through the top of the separator 1, extends vertically to the central axis of the separator 1, and forms a U-shape at the top. Lean mixture exhaust pipe 2 bent to
is provided. A rich mixture discharge pipe 9 is connected to the lower outlet of the separator 1 . A rich mixture air box 13, a lean air mixture air box 14, and a secondary air air box 15 are attached to the ceiling of the furnace 12. A rich mixture nozzle 4 that surrounds the lower end opening of the rich mixture exhaust pipe 9 and opens toward the inside of the furnace 12 is provided in the rich mixture air box 13 . A lean mixture nozzle 5 that surrounds the outlet side opening of the lean mixture discharge pipe 2 and opens toward the inside of the furnace 12 is provided in the lean mixture air box 14 . A secondary air duct 3 is arranged through the upper wall of the secondary air wind box 15, and the secondary air wind box 1
5 surrounds the lower end opening of the secondary air duct,
A secondary air nozzle 6 opening into the furnace 12 is provided. Note that a lean mixture discharge amount regulator 7 such as a flow rate regulating valve or the like is disposed in the middle of the lean mixture discharge pipe 2 .
微粉固定燃料は図示されてない例えば、ミル、
微粉燃料ビン等のような微粉固体燃料供給設備か
ら空気との混合気流として供給管８を介して分離
器１へ送り込まれる。混合気流は分離器１内で旋
回力が与えられ、分離器１下方へ向う下降流と上
方へ向う上昇流とに分れるが、混合気８中の微粉
粒子は、旋回力によつて生じる遠心力により混合
気と分離し、下方へ落下しようとする力が働くた
め、下降流側が微粉濃度が濃い、いわゆる濃混合
気となる。 The pulverized fixed fuel is not shown, for example, a mill,
The pulverized solid fuel is fed from a pulverized solid fuel supply equipment such as a pulverized fuel bottle to the separator 1 via the supply pipe 8 as a mixed air flow with air. A swirling force is applied to the mixed gas flow in the separator 1, and the mixture is divided into a downward flow toward the bottom of the separator 1 and an upward flow toward the top. Because the force acts to separate the mixture from the air-fuel mixture and cause it to fall downward, the downward flow side becomes a so-called rich mixture with a higher concentration of fine particles.
一方、上昇流は、遠心力の作用が弱い、微小粒
径の微粉粒子群と空気の混合気で、微粉濃度が薄
い淡混合気を形成する。 On the other hand, the upward flow is a mixture of air and a group of fine powder particles with a small particle size, where the action of centrifugal force is weak, forming a light mixture with a low concentration of fine powder.
濃混合気は濃混合気排出管９を介した濃混合気
ノズル４から炉１２内へ噴射され、図示されてな
い着火源によつて着火し、濃燃料火炎１０を形成
する。 The rich mixture is injected into the furnace 12 from the rich mixture nozzle 4 via the rich mixture discharge pipe 9, and is ignited by an ignition source (not shown) to form a rich fuel flame 10.
淡混合気は淡混合気排出管２を通つて淡混合気
ノズル５から炉１２内へ噴射され、濃燃料火炎１
０によつて着火、燃焼に供され淡燃料火炎１１を
形成する。 The lean mixture is injected into the furnace 12 from the lean mixture nozzle 5 through the lean mixture discharge pipe 2, and the rich fuel flame 1 is injected into the furnace 12.
0, the fuel is ignited and combusted to form a light fuel flame 11.
濃混合気と淡混合気の流量割合は淡混合気排出
量調節器７によつて調節されるが、微粉濃度の調
節は不可能である。 Although the flow rate ratio of the rich mixture and the lean mixture is adjusted by the lean mixture discharge amount regulator 7, it is not possible to adjust the fine powder concentration.
一般に、微粉固体燃料供給設備から送られて来
る混合気の空気／微粉燃料（以下Ａ／Ｃという）
は２〜３（重量比）であり、微粉固体燃料の理論
空気量を９Kg／Kgとすれば濃・淡両混合気から供
給された空気量は理論空気量の22〜33％、全必要
燃料空気量（空気比入＝1.235）に対しては18〜
27％に相当する。従つて、混合気から供給される
空気量だけでは全微粉固体燃料の燃焼には不足す
るためこの不足分は別途、図示されてない送風機
により二次空気として二次空気ダクト３から供給
され、二次空気ノズル６から炉１２内へ送り込ま
れ、燃焼に供されている。 Generally, the air/fine fuel mixture sent from the pulverized solid fuel supply equipment (hereinafter referred to as A/C)
is 2 to 3 (weight ratio), and if the theoretical air amount of pulverized solid fuel is 9 kg/kg, the air amount supplied from both rich and lean mixtures is 22 to 33% of the theoretical air amount, which is the total required fuel. 18~ for air volume (air ratio = 1.235)
This corresponds to 27%. Therefore, since the amount of air supplied from the mixture is insufficient for the combustion of all the pulverized solid fuel, this shortage is separately supplied as secondary air from the secondary air duct 3 by a blower (not shown), and Next air is sent into the furnace 12 from the air nozzle 6 and is subjected to combustion.
微粉固定燃料の着火性は他燃料の場合同様に、
その噴出速度を火炎伝播速度以下に保つこと、混
合気温度を高めること、及び混合気濃度を高め
る、すなわち、Ａ／Ｃを小にすることによつて促
進されることは衆知の事実である。
The ignitability of pulverized fixed fuel is similar to that of other fuels.
It is a well-known fact that this can be promoted by keeping the ejection velocity below the flame propagation velocity, increasing the mixture temperature, and increasing the mixture concentration, that is, by reducing the A/C.
微粉固体燃料供給設備から送られて来る混合気
のＡ／Ｃは２〜３であり、従来の装置では微粉濃
度の調節が不可能なため、これ以上混合気濃度を
高められないこと、混合気温度も微粉固体燃料供
給設備から送られて来るまゝの温度（約100℃前
後）であること、及び略々、決められたＡ／Ｃで
送られて来るため混合気、特に濃混合気の噴出速
度を、その火炎伝播速度以下に調整出来ないこと
等があり、特に、燃料比（固定炭素／揮発分）の
高い微粉固体燃料の場合は、安定燃焼が困難であ
つた。 The A/C of the mixture sent from the fine powder solid fuel supply equipment is 2 to 3, and it is impossible to adjust the fine powder concentration with conventional equipment, so the mixture concentration cannot be increased any further. The temperature is also the same temperature as when it is sent from the pulverized solid fuel supply equipment (about 100℃), and it is sent at approximately the predetermined A/C, so the air-fuel mixture, especially the rich air-fuel mixture, is In some cases, the ejection velocity cannot be adjusted below the flame propagation velocity, and stable combustion is particularly difficult in the case of pulverized solid fuel with a high fuel ratio (fixed carbon/volatile matter).
上記問題点を解決するために、本考案は、気体
と微粉燃料との混合された微粉燃料混合気を大径
粒子を多く含みガスの少ない濃混合気と小径粒子
を多く含みガスの多い淡混合気とに分離する分離
器と、分離器によつて分離された淡混合気を炉内
へ下向きに噴出する淡混合気ノズルと、淡混合気
ノズルに並設され分離器で分離された濃混合気を
炉内へ下向きに噴出する濃混合気ノズルと、濃混
合気ノズル内に一次空気を導入する一次空気導入
管と、淡混合気ノズルと濃混合気ノズルとに並置
され二次空気を炉内へ下向きに噴出する二次空気
ノズルと、分離器の濃混合気の出口と濃混合気ノ
ズルの入口との間へ上下動位置決め可能であつて
濃混合気の出口に上端開口を臨ませて設けられた
漏斗状の混合器と、混合器で混合された濃混合気
ノズルから噴出される一次空気と濃混合気との混
合流とに旋回を与える旋回羽根とを有する微粉燃
料燃焼装置を提供している。
In order to solve the above problems, the present invention divides the pulverized fuel mixture, which is a mixture of gas and pulverized fuel, into a rich mixture containing many large-diameter particles and little gas, and a light mixture containing many small-diameter particles and many gases. A separator that separates the mixture into gas and gas, a lean mixture nozzle that injects the lean mixture separated by the separator downward into the furnace, and a rich mixture that is installed in parallel with the lean mixture nozzle and separated by the separator. A rich mixture nozzle that blows out air downward into the furnace, a primary air introduction pipe that introduces primary air into the rich mixture nozzle, and a lean mixture nozzle and a rich mixture nozzle that are arranged in parallel to supply secondary air to the furnace. A secondary air nozzle that blows out inwardly and downwardly can be vertically positioned between the outlet of the rich mixture gas of the separator and the inlet of the rich mixture nozzle, and the upper end opening faces the outlet of the rich mixture gas. Provided is a pulverized fuel combustion device having a funnel-shaped mixer provided and a swirling vane that swirls a mixed flow of primary air and a rich mixture jetted from a rich mixture nozzle mixed in the mixer. are doing.
漏斗状の混合器を上下動させて、一次空気流入
のための開口面積を変え、一次空気の流入量を変
えて、混合器から濃混合気ノズルに入る混合気の
濃度を変える。又、混合気から濃混合気ノズルに
入る混合気に旋回羽根で旋回を与え、濃混合気ノ
ズルから混合気は旋回しながら高速で吹き出さ
れ、吹き出し近傍は渦流が形成されて濃燃料火炎
の一部を吸引し、この火炎を着火源として濃混合
気は吹き出し近傍で燃焼を開始する。
By moving the funnel-shaped mixer up and down, the opening area for the inflow of primary air is changed, the amount of inflow of primary air is changed, and the concentration of the mixture entering the rich mixture nozzle from the mixer is changed. In addition, swirling blades give a swirl to the mixture entering the rich mixture nozzle, and the mixture is blown out from the rich mixture nozzle at a high speed while swirling, and a vortex is formed near the outlet, causing a part of the rich fuel flame. Using this flame as an ignition source, the rich air-fuel mixture starts to burn near the outlet.
第１図、第２図により本考案の実施例を説明す
る。
An embodiment of the present invention will be explained with reference to FIGS. 1 and 2.
サイクロン式の分離器１の上方に接線方向に伸
びた供給管８が連結され、分離器１の頂部を貫通
して分離器１の中心軸部に上下に伸びて配置さ
れ、上部でＵ字状に折れ曲つた淡混合気排出管２
が設けられている。分離器１の下方の出口には、
濃混合気排出管９が連結されている。炉１２の天
井部には、濃混合気風箱１３、淡混合気風箱１
４、及び二次空気風箱１５が隣接して配置されて
いる。濃混合器風箱１３には、一次空気導入管１
６が連結され、濃混合気排出管９が濃混合気風箱
１３の上壁を貫通し、内部で開口している。濃混
合気風箱１３の下方端近傍内部で上端が開口した
一次空気及び濃混合気を炉１２内に吹き出す濃混
合気ノズル１７が配置されている。濃混合気風箱
１３内部で、上方部が濃混合気排出管９の下方部
を取囲み、下方部が濃混合気ノズル１７の上方部
で取囲まれた漏斗状の混合器１８が配置されてい
る。混合器１８の上端内部には、旋回羽根１９が
取付けられている。又、混合器１８には、濃混合
気風箱１３の上壁を貫通した操作桿２０が連結さ
れている。濃混合気排出管９の下方開口端近傍に
は、円錐状の濃度調節器２１が配置され、分離器
１の中心軸線上を上下に伸び淡混合気排出管２を
貫通し、２上方に突出した操作桿２２の下端に濃
度調節器２１の頂部が連結している。 A supply pipe 8 extending tangentially is connected above the cyclone type separator 1, passes through the top of the separator 1, extends vertically to the central axis of the separator 1, and forms a U-shape at the top. Lean mixture exhaust pipe 2 bent to
is provided. At the lower outlet of separator 1,
A rich mixture discharge pipe 9 is connected. A rich mixture air box 13 and a lean air mixture air box 1 are installed on the ceiling of the furnace 12.
4, and a secondary air wind box 15 are arranged adjacent to each other. The concentrated mixer wind box 13 has a primary air introduction pipe 1.
6 are connected, and a rich mixture discharge pipe 9 passes through the upper wall of the rich mixture air box 13 and opens inside. A rich mixture nozzle 17 having an open upper end and blowing out primary air and a rich mixture into the furnace 12 is arranged near the lower end of the rich mixture air box 13 . A funnel-shaped mixer 18 whose upper part surrounds the lower part of the rich mixture discharge pipe 9 and whose lower part is surrounded by the upper part of the rich mixture nozzle 17 is arranged inside the rich mixture air box 13. There is. A swirl vane 19 is attached inside the upper end of the mixer 18 . Further, an operating rod 20 penetrating the upper wall of the rich mixture air box 13 is connected to the mixer 18 . A conical concentration regulator 21 is disposed near the lower opening end of the rich mixture discharge pipe 9, extends vertically on the central axis of the separator 1, penetrates the lean mixture discharge pipe 2, and projects upwardly. The top of the concentration regulator 21 is connected to the lower end of the operating rod 22.
淡混合気風箱１４内には、淡混合気排出管２の
出口側開口を取囲み、炉１２内に向つて開口した
淡混合気ノズル５が配置され、二次空気風箱１５
の上部壁を貫通して二次空気ダクト３が配置さ
れ、二次空気風箱１５内には、二次空気ダクト３
の下端開口を取囲み、炉１２内に向つて開口した
二次空気ノズル６が配置されている。 A lean air mixture nozzle 5 that surrounds the outlet side opening of the lean air mixture discharge pipe 2 and opens toward the inside of the furnace 12 is disposed inside the lean air mixture air box 14 , and the secondary air air air air box 15
A secondary air duct 3 is disposed passing through the upper wall of the secondary air wind box 15.
A secondary air nozzle 6 is disposed surrounding the opening at the lower end of the furnace 12 and opening toward the interior of the furnace 12 .
淡混合気排出管２の途中には淡混合気排出量調
節器７が設けられている。 A lean mixture discharge amount regulator 7 is provided in the middle of the lean mixture discharge pipe 2.
図示されてない微粉固体燃料供給設備から分離
器１へ送り込まれて来た混合気は分離器１で下降
流の濃混合気と上昇流の淡混合気に分れる。 The mixture fed into the separator 1 from a fine powder solid fuel supply facility (not shown) is separated into a rich mixture flowing downward and a lean mixture flowing upward.
操作桿２２を操作して濃度調節器２１を上方に
引き上げると濃混合気排出口面積が狭まつて濃混
合気、特に空気の流量が減少し空気は淡混合気排
出管２内に流れて分離効率が変化し、濃混合気排
出管９から排出される濃混合気のＡ／Ｃも減少す
る。濃度調節器２１を下方に押し下げると逆に濃
混合気の流量及びＡ／Ｃが増加する。 When the concentration regulator 21 is pulled upward by operating the operation stick 22, the area of the rich mixture discharge port is narrowed and the flow rate of the rich mixture, especially air, is reduced, and the air flows into the lean mixture discharge pipe 2 and is separated. The efficiency changes, and the A/C of the rich mixture discharged from the rich mixture exhaust pipe 9 also decreases. Conversely, when the concentration regulator 21 is pushed downward, the flow rate of the rich mixture and the A/C increase.
このようにして濃混合気のＡ／Ｃを調節された
濃混合気は、漏斗型混合器１８へ送り込まれ、別
途旋回羽根１９を通して送り込まれて来る高温の
一次空気と混合される。 The rich air-fuel mixture whose A/C has been adjusted in this manner is sent to the funnel-type mixer 18 and mixed with high-temperature primary air that is sent separately through the swirl vane 19.
一次空気は図示されてない送風機によつて２次
空気と共に図示されてない空気予熱器で加熱され
た後、一次空気導入管１６を通して送り込まれて
来るが、濃混合気との混合量は漏斗型混合器１８
を操作桿２０で上下されることにより、一次空気
の流れる部分の断面積が変化し、流入量が変化し
て一次空気と混合した後の濃混合気のＡ／Ｃが微
粉固体燃料の燃焼に好適な値となるよう調節され
る。 The primary air is heated by a blower (not shown) together with secondary air in an air preheater (not shown), and then is sent through the primary air introduction pipe 16, but the amount of mixture with the rich mixture is funnel-shaped. mixer 18
By moving up and down with the operating stick 20, the cross-sectional area of the part through which the primary air flows changes, and the amount of inflow changes, so that the A/C of the rich mixture mixed with the primary air is used to burn the pulverized solid fuel. Adjust to a suitable value.
濃混合気は１次空気が旋回羽根１９を通過する
際に与えられる旋回力により旋回流として濃混合
気ノズル１７から炉１２内へ吹き込まれ、図示さ
れてない着火源によつて着火され、濃燃料火炎１
０を形成する。 The rich mixture is blown into the furnace 12 from the rich mixture nozzle 17 as a swirling flow by the swirling force given when the primary air passes through the swirling vanes 19, and is ignited by an ignition source (not shown). Rich fuel flame 1
form 0.
このようして形成された濃燃料火炎１０は濃混
合気の噴出速度が微粉固体燃料の火炎伝播速度を
越える高速度であつても濃混合気自体が旋回流で
あるため吹き出し口近傍では渦流（循環流）が形
成され、濃燃料火炎１０の一部を吸引するので、
これが着火源となつて濃混合気吹き出し口近傍で
常に安定した保炎が得られる。 The rich fuel flame 10 formed in this way has a vortex flow ( A circulating flow) is formed and a part of the fuel-rich flame 10 is sucked, so that
This serves as an ignition source, and a stable flame can always be obtained near the rich air-fuel mixture outlet.
淡混合気は淡混合気排出管２を通して淡混合気
ノズル５へ送り込まれ、炉１２内へ噴射され、濃
燃料火炎１０によつて着火、燃焼に供され、淡燃
料火炎１１を形成する。 The lean mixture is sent through the lean mixture discharge pipe 2 to the lean mixture nozzle 5 and injected into the furnace 12, where it is ignited and combusted by the rich fuel flame 10 to form a lean fuel flame 11.
一般に図示されてない微粉固体燃料供給設備か
ら送られて来る混合気のＡ／Ｃは２〜３（重量比）
であるため、混合気から供給される空気量は全必
要燃料空気量の約18〜27％であり、一方、一次空
気量も全必要燃焼空気量の約10〜20％程度である
故、混合気及び一次空気のみでは全微粉固体燃料
の燃料には不足する。この不足分は別途図示され
てない送風機により二次空気として二次空気ダク
ト３から供給されて二次空気ノズル６から炉１２
内へ送り込まれ、燃焼に供される。 Generally, the A/C of the mixture sent from the fine powder solid fuel supply equipment (not shown) is 2 to 3 (weight ratio)
Therefore, the amount of air supplied from the mixture is about 18 to 27% of the total required amount of fuel air, and on the other hand, the amount of primary air is also about 10 to 20% of the total amount of required combustion air. Air and primary air alone are insufficient for all-pulverized solid fuel. This shortage is supplied as secondary air from the secondary air duct 3 by a blower (not shown separately), and from the secondary air nozzle 6 to the furnace 12.
It is sent inside and subjected to combustion.
本考案によれば、濃・淡両混合気の濃度及び配
分比を自由に設定出来、且つ、濃混合気は高温の
旋回流を形成するため特に濃燃料火炎の着火性が
向上されて燃焼が安定する。
According to the present invention, the concentration and distribution ratio of both rich and lean mixtures can be freely set, and since the rich mixture forms a high-temperature swirling flow, the ignitability of the rich fuel flame is particularly improved and combustion is facilitated. Stabilize.
第１図は本考案の一実施例の縦断面図、第２図
は第１図中の主要部の縦断面部分図、第３図は従
来の装置の縦断面図である。
１……分離器、２……淡混合気排出管、３……
二次空気ダクト、４，１７……濃混合気ノズル、
５……淡混合気ノズル、６……二次空気ノズル、
７……淡混合気排出量調節器、８……供給管、９
……濃混合気排出管、１２……炉、１３……濃混
合気用風箱、１４……淡混合気用風箱、１５……
二次空気風箱、２１……濃度調節器、２０，２２
……操作桿、１６……一次空気導入管、１８……
混合器、１９……旋回羽根。
FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a partial vertical cross-sectional view of the main part in FIG. 1, and FIG. 3 is a vertical cross-sectional view of a conventional device. 1... Separator, 2... Lean mixture discharge pipe, 3...
Secondary air duct, 4, 17... rich mixture nozzle,
5... Lean mixture nozzle, 6... Secondary air nozzle,
7... Lean mixture discharge amount controller, 8... Supply pipe, 9
... Rich mixture discharge pipe, 12 ... Furnace, 13 ... Wind box for rich mixture, 14 ... Wind box for lean mixture, 15 ...
Secondary air wind box, 21... Concentration regulator, 20, 22
...Operation stick, 16...Primary air introduction pipe, 18...
Mixer, 19... swirling vane.
Claims (1)
を大径粒子を多く含みガスの少ない濃混合気と小
径粒子を多く含みガスの多い淡混合気とに分離す
る分離器と、同分離器によつて分離された淡混合
気を炉内へ下向きに噴出する淡混合気ノズルと、
同淡混合気ノズルに並設され上記分離器で分離さ
れた濃混合気を上記炉内へ下向きに噴出する濃混
合気ノズルと、同濃混合気ノズル内に一次空気を
導入する一次空気導入管と、上記淡混合気ノズル
と濃混合気ノズルとに並置され二次空気を上記炉
内へ下向きに噴出する二次空気ノズルと、上記分
離器の濃混合気の出口と上記濃混合気ノズルの入
口との間へ上下動位置決め可能であつて上記濃混
合気の出口に上端開口を臨ませて設けられた漏斗
状の混合器と、同混合器で混合され上記濃混合気
ノズルから噴出される一次空気と濃混合気との混
合流とに旋回を与える旋回羽根とを有することを
特徴とする微粉燃料燃焼装置。 A separator that separates a pulverized fuel mixture, which is a mixture of gas and pulverized fuel, into a rich mixture containing many large-diameter particles and little gas, and a lean mixture containing many small-diameter particles and many gases; a lean mixture nozzle that injects the separated lean mixture downward into the furnace;
A rich mixture nozzle that is installed in parallel with the lean mixture nozzle and injects the rich mixture separated by the separator downward into the furnace, and a primary air introduction pipe that introduces primary air into the rich mixture nozzle. , a secondary air nozzle that is arranged in parallel with the lean mixture nozzle and the rich mixture nozzle and injects secondary air downward into the furnace, and an outlet of the rich mixture of the separator and the rich mixture nozzle. a funnel-shaped mixer that can be vertically positioned between the inlet and the upper end opening facing the outlet of the rich mixture; and the mixture is mixed in the mixer and is ejected from the rich mixture nozzle. A pulverized fuel combustion device comprising a swirling vane that swirls a mixed flow of primary air and a rich mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13629786U JPH0424250Y2 (en) | 1986-09-05 | 1986-09-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13629786U JPH0424250Y2 (en) | 1986-09-05 | 1986-09-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6344015U JPS6344015U (en) | 1988-03-24 |
| JPH0424250Y2 true JPH0424250Y2 (en) | 1992-06-08 |
Family
ID=31039275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13629786U Expired JPH0424250Y2 (en) | 1986-09-05 | 1986-09-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0424250Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2752107B2 (en) * | 1988-10-31 | 1998-05-18 | バブコツク日立株式会社 | Combustion device for particulate fuel |
| JP2813361B2 (en) * | 1989-03-03 | 1998-10-22 | 三菱重工業株式会社 | Pulverized coal combustion method |
-
1986
- 1986-09-05 JP JP13629786U patent/JPH0424250Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6344015U (en) | 1988-03-24 |
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