JPS6370012A - Slurry fuel burner - Google Patents
Slurry fuel burnerInfo
- Publication number
- JPS6370012A JPS6370012A JP21280886A JP21280886A JPS6370012A JP S6370012 A JPS6370012 A JP S6370012A JP 21280886 A JP21280886 A JP 21280886A JP 21280886 A JP21280886 A JP 21280886A JP S6370012 A JPS6370012 A JP S6370012A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- flame stabilizer
- secondary air
- ignition
- air passage
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 11
- 239000002002 slurry Substances 0.000 title claims abstract description 9
- 239000003381 stabilizer Substances 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は石炭、水、スラリーく以下、Ｃ〜ＶＳという
）に代表されるスラリー状塩↑１の燃焼バーナに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a combustion burner for coal, water, and slurry salt (hereinafter referred to as C to VS).
従来の技術
Ｃ〜ｖＳはポンプ等ここよりボイラのバーナへ加圧供給
され、液体燃料同様に、霧化用気体として蒸気や空気に
より微粒化して燃焼させることができる。Conventional technologies C to vS are supplied under pressure to the burner of a boiler from a pump or the like, and, like liquid fuel, can be atomized with steam or air as an atomizing gas and combusted.
しかし゛ながらＣＷＳは多量の微粉化された石炭を含み
水を溶媒として（石炭濃度６０〜７０％、ｉ足って水分
４０〜３０％）、添加剤を加えて製造されているため、
次のような欠点がある。However, CWS contains a large amount of pulverized coal and is manufactured using water as a solvent (coal concentration 60-70%, i plus water 40-30%) and additives.
It has the following drawbacks:
（１）粘度が高く、微粒化された石炭粒子同士の強固な
凝集力のため巖粒化しにくく、Ｃ〜ＶＳ？α滴の平均粒
子は１００〜３００μｍあり、微粉１ヒされた石炭粒子
の平均粒子４０〜６０μｍに比べて大きく、ＣＷＳ液滴
は集合したまま燃焼するので、完全燃焼しにくい。(1) Due to the high viscosity and strong cohesive force between atomized coal particles, it is difficult to form granules, and C to VS? The average particle size of α droplets is 100 to 300 μm, which is larger than the average particle size of pulverized coal particles of 40 to 60 μm, and since CWS droplets burn while being aggregated, complete combustion is difficult.
（２〉水分を４０〜３０％含んでいるため、微粒化され
たＣＷＳ液適中に含まれる石炭粒子が着火燃焼する前う
こ水分の蒸発過程を必要とする。(2> Since it contains 40 to 30% water, it is necessary to evaporate the water content before the coal particles contained in the atomized CWS liquid ignite and burn.
このため着火点が不安定であり、安定した火炎の維持が
困難であり、燃焼効率が低下すると共に息つき燃焼成は
失火をも生じていた。For this reason, the ignition point is unstable, making it difficult to maintain a stable flame, reducing combustion efficiency and causing misfires due to the combustion combustion.
第２図は従来のＣＷＳバーナの一例を示し、ＣＷＳバー
ナガン１の先端に設けられたアトマイザ−２から噴霧さ
れたＣＷＳは１次空気通路３及び２次空気通路４から各
々供給される１次空気５及び２次空気６により燃焼する
が、この着火と火炎を維持するために、２次空気は強い
旋回流を必要とし、旋回流とバーナガン先端外周に設け
られた保炎板７により空気温８によって着火点９を引き
込み着火を維持するように考えられている。FIG. 2 shows an example of a conventional CWS burner, in which CWS sprayed from an atomizer 2 provided at the tip of a CWS burner gun 1 is primary air supplied from a primary air passage 3 and a secondary air passage 4, respectively. 5 and secondary air 6, but in order to maintain this ignition and flame, the secondary air requires a strong swirling flow, and the swirling flow and the flame holding plate 7 provided around the tip of the burner gun keep the air temperature It is considered that the ignition point 9 is pulled in to maintain ignition.
発明が解決しようとする問題点
しかしながら、このようなものではＣＷＳ中に水分が３
０〜４０％含まれているために、着火の維持は極めて難
しく、着火点９と火炎１０を安定することは実用的に困
難で、１次空気の供給の偏りと保炎板７の焼損もあり、
安定した着火と良好な燃焼を得ることに問題があった。Problems to be Solved by the Invention However, in this type of CWS, water is
Since it contains 0 to 40%, it is extremely difficult to maintain ignition, and it is practically difficult to stabilize the ignition point 9 and flame 10, and there is also an imbalance in the supply of primary air and burnout of the flame-holding plate 7. ,
There were problems in obtaining stable ignition and good combustion.
この発明は、ＣＷＳの燃焼における上述の如き問題、即
ち、ＣＷＳ液滴が石炭粒子同士の強固な凝集力により微
粒化しにくく、石炭粒子が集合したままで燃焼し、かつ
燃焼に先立って水分の蒸発過程を必要とするため、安定
した着火と火炎が得られ錐＜、燃焼効率が低いこと、ま
た安定した連続運転が難しいこと等の問題を解決してＣ
ＷＳの中小型ボイラ゛等への商業的普及を計るものであ
る。This invention solves the above-mentioned problems in CWS combustion, namely, CWS droplets are difficult to atomize due to the strong cohesive force between coal particles, coal particles burn while aggregated, and moisture evaporates prior to combustion. C
The aim is to commercially spread WS to small and medium-sized boilers.
間１点を解決するための手段
この発明は、多量の水分を含むＣＷＳの着火点を保炎器
に近付けることによって、安定した着火と火炎を得るよ
うにしたものであって、具体的には、
バーナガン１１の先端にスラリー燃料を噴霧するアトマ
イザ−１２を設け、該バーナガンの先端外周に保炎器１
３を設け、該保炎器に１次空気通路１４を連通させ、該
１次空気通路の外周に２次空気通路１５を設けたバーナ
であって、前記保炎器１３をセラミック多孔体で構成し
たスラリー燃料燃焼バーナ、
である。Means for Solving the Problems This invention provides stable ignition and flame by bringing the ignition point of CWS containing a large amount of water closer to the flame stabilizer. Specifically, An atomizer 12 for spraying slurry fuel is provided at the tip of the burner gun 11, and a flame stabilizer 1 is provided on the outer periphery of the tip of the burner gun.
3, a primary air passage 14 is communicated with the flame holder, and a secondary air passage 15 is provided on the outer periphery of the primary air passage, the flame holder 13 being made of a ceramic porous body. is a slurry fuel combustion burner.
作用
ＣＷＳはアトマイザ−１２より噴霧され、１次空気通路
１４からの１次空気１８は保炎器１３を通過して前記Ｃ
ＷＳの噴霧流の着火部に向って供給され、２次空気通路
１５からの２次空気１９は保炎器の外周の２次空気供給
口１７から旋回流として火炎２０に向って供給される。The working CWS is atomized by the atomizer 12, and the primary air 18 from the primary air passage 14 passes through the flame stabilizer 13 to collect the CWS.
The secondary air 19 from the secondary air passage 15 is supplied toward the ignition part of the spray stream of the WS, and is supplied toward the flame 20 as a swirling flow from the secondary air supply port 17 on the outer periphery of the flame stabilizer.
この２次空気の旋回流によって、保炎器１３の前部近く
には負圧部分が形成される。Due to this swirling flow of secondary air, a negative pressure portion is formed near the front of the flame stabilizer 13.
また保炎器１３はセラミックの多孔体から構成され、火
炎２０からのふく射熱によって高温となっている。Further, the flame stabilizer 13 is made of a porous ceramic body, and is heated to a high temperature by the radiant heat from the flame 20.
したがって、前記アトマイザ−１２からのＣＷＳは効率
よく前記負圧部分に噴霧され、１次空気通路１４からの
１次空気１８は保炎器１３を通過する際保炎器から熱を
吸収して高温状態で整流されて前記ＣＷ Ｓ ＋＊＊流
に向って供給されることになる。Therefore, the CWS from the atomizer 12 is efficiently sprayed into the negative pressure section, and the primary air 18 from the primary air passage 14 absorbs heat from the flame stabilizer 13 when passing through the flame stabilizer 13, resulting in high temperature. The current is rectified and supplied to the CW S +** flow.
このＣＷＳ噴霧流の一部と１次空気は前記負圧部分では
げしく攪イず混合されて着火部を形成する。A portion of this CWS spray flow and the primary air are mixed without being vigorously stirred in the negative pressure section to form an ignition section.
そして、この際火炎から保炎器が得たふく射熱の一部は
保炎器から前記着火部に供給されてＣ〜ＶＳ中の水分の
蒸発を促進する。At this time, a part of the radiant heat obtained by the flame stabilizer from the flame is supplied from the flame stabilizer to the ignition section to promote evaporation of moisture in C to VS.
このため、保炎器１３があたかも着火点のようになり、
火炎が保炎器から形成されることになる。Therefore, the flame stabilizer 13 becomes like an ignition point,
A flame will form from the flame holder.
実施例
ＣＷＳバーナガン１１はその先端にアトマイザ−１２を
有しハウジングチューブ２１によって保持されている。The embodiment CWS burner gun 11 has an atomizer 12 at its tip and is held by a housing tube 21.
ハウジングチューブ２１のまわりには１次空気１８のた
めの１次空気通路１４と２次空気１９のための２次空気
通路１５が配置されており、２次空気１５は旋回翼等に
より旋回を与えられて２次空気供給口１７から噴出する
。A primary air passage 14 for primary air 18 and a secondary air passage 15 for secondary air 19 are arranged around the housing tube 21, and the secondary air 15 is given a swirl by a swirler or the like. and is ejected from the secondary air supply port 17.
ハウジングチューブ２１の先端外周には、セラミック多
孔体で作られた保炎器１３が配置されている。該保炎器
１３は空隙率６５〜８０％であり、１次空気を均一とこ
着火部２２に供給すると共に加熱する役割をもつもので
ある。またこの保炎器１３はハウジングチューブ２１に
挿入され取付バネ２３によって押圧固定されていると共
に保炎器１３の外周面１６は２次空気の供給口１７の内
周面を形成している。A flame stabilizer 13 made of a porous ceramic material is disposed around the outer periphery of the tip of the housing tube 21 . The flame stabilizer 13 has a porosity of 65 to 80%, and has the role of uniformly supplying primary air to the ignition section 22 and heating it. Further, this flame stabilizer 13 is inserted into the housing tube 21 and is pressed and fixed by a mounting spring 23, and the outer circumferential surface 16 of the flame stabilizer 13 forms the inner circumferential surface of the secondary air supply port 17.
また保炎器１３を囲むようここふく射熱放射器２４が２
次空気通路１５の先端に配置され、この放射器２４は耐
火材或はセラミックで作られている。In addition, two heat radiators 24 are installed here to surround the flame stabilizer 13.
The radiator 24 is placed at the end of the air passage 15 and is made of refractory material or ceramic.
２次空気の旋回流２５によって、保炎器１３の前部近く
に負圧の領域が形成され安定した渦流２６が発生する。The swirling flow 25 of the secondary air forms a negative pressure region near the front of the flame stabilizer 13 and generates a stable vortex flow 26.
アトマイザ−１２からのＣＷ Ｓの噴Ｎ流の一部と保炎
器１３からの１次空気はこの渦流によってはげしく攪ｉ
ｆ混合されて着火し、保炎器１３の前部から安定した着
火部２２が得られる。A part of the CW S jet N flow from the atomizer 12 and the primary air from the flame stabilizer 13 are violently agitated by this vortex flow.
f is mixed and ignited, and a stable ignition part 22 is obtained from the front part of the flame stabilizer 13.
この際、着火部に必要な１次空気は保炎器を通過する間
に加熱されて高温となり、また火炎と保炎器前面のふく
射熱の授受により着火部の水分蒸発は促進されて着火の
安定は更に維持される。At this time, the primary air required for the ignition part is heated to a high temperature while passing through the flame holder, and the transfer of radiant heat between the flame and the front of the flame holder promotes moisture evaporation in the ignition part and stabilizes the ignition. is further maintained.
またＣＷＳ噴霧流は２次空気の旋回流２５により攪イ混
合され、ふく射熱放射器２４によって火炎からのふく射
熱がｃｗｓｎａｉ流に与えられ水分の蒸発が促進されて
、着火は勿論のこと火炎の安定も得られる。In addition, the CWS spray stream is agitated and mixed by the swirling flow 25 of secondary air, and the radiant heat radiator 24 gives radiant heat from the flame to the CWS spray stream, promoting the evaporation of moisture, which not only improves ignition but also stabilizes the flame. can get.
なお、２７は１次空気人口、２８は２次空気人口をしめ
す。Note that 27 represents the primary air population and 28 represents the secondary air population.
発明の効果
この発明は、バーナガンの先端にスラリー燃料を噴霧す
るアトマイザ−を設け、該バーナガンの先端外周に保炎
器を設け、該保炎器に１次空気通路を連通−させ、該１
次空気通路の外周に２次空気通路を設けたバーすてあっ
て、前記保炎器をセラミック多孔体で構成するようにし
たので、火炎のふく射熱を保炎器て利用して１次空気の
予熱は充分に行われ、ＣＷＳの水分の蒸発が最高に促進
されるから、ＣＷＳの燃焼時に保炎器前面から安定した
着火と火炎が得られ、保炎器の焼損の問題もなく、良好
な燃焼が維持される。したがって、ボイラ等に適用する
場合に燃焼効率の高いものが得られる。Effects of the Invention This invention provides an atomizer for spraying slurry fuel at the tip of a burner gun, a flame holder on the outer periphery of the tip of the burner gun, and a primary air passage communicating with the flame holder.
Since there is a bar with a secondary air passage provided on the outer periphery of the secondary air passage, and the flame stabilizer is made of a porous ceramic material, the flame stabilizer utilizes the radiant heat of the flame to stabilize the primary air. The preheating is sufficient and the evaporation of water in the CWS is promoted to the maximum, so when the CWS is burned, stable ignition and flame can be obtained from the front of the flame holder, and there is no problem of burnout of the flame holder, resulting in a good flame holder. Combustion is maintained. Therefore, when applied to a boiler or the like, a product with high combustion efficiency can be obtained.
更に保炎器の外周面１６を２次空気供給口の内周面とす
ることにより、２次空気も充分に予熱されて燃焼効率の
向上に役立つと共に外周面１６が熱膨張に対してフリー
な状態となるので、１次空気通路１４を構成する鋼板と
セラミック多孔体との間の熱膨張率の相違による歪みが
該外周面１６て解放されることになり、保炎器１３を構
成するセラミック多孔体の取付けが極めて容易となる。Furthermore, by making the outer circumferential surface 16 of the flame stabilizer the inner circumferential surface of the secondary air supply port, the secondary air is also sufficiently preheated, which helps improve combustion efficiency, and the outer circumferential surface 16 is free from thermal expansion. As a result, the strain due to the difference in coefficient of thermal expansion between the steel plate constituting the primary air passage 14 and the ceramic porous body is released on the outer circumferential surface 16, and the ceramic constituting the flame stabilizer 13 Attachment of the porous body becomes extremely easy.
第１図はこの発明に係るバーナの一実施例の断面図、第
２図は従来例の断面図を示す。
１１・・・バーナガン、 １２・・・アトマイザ−１
１３・・・保炎器、 １４・・・１次空気通路、１５
・・・２次空気通路、 １７・・・２次空気供給口、
以上。FIG. 1 is a sectional view of an embodiment of a burner according to the present invention, and FIG. 2 is a sectional view of a conventional example. 11... burner gun, 12... atomizer-1
13...Flame stabilizer, 14...Primary air passage, 15
...Secondary air passage, 17...Secondary air supply port,
that's all.
Claims (2)
マイザーを設け、該バーナガンの先端外周に保炎器を設
け、該保炎器に１次空気通路を連通させ、該１次空気通
路の外周に２次空気通路を設けたバーナであって、前記
保炎器をセラミック多孔体で構成したことを特徴とする
スラリー燃料燃焼バーナ。(1) An atomizer that sprays slurry fuel is provided at the tip of the burner gun, a flame holder is provided on the outer periphery of the tip of the burner gun, a primary air passage is communicated with the flame holder, and two 1. A slurry fuel combustion burner provided with a secondary air passage, characterized in that the flame stabilizer is made of a ceramic porous body.
ことを特徴とする特許請求の範囲第１項記載のスラリー
燃料燃焼バーナ。(2) The slurry fuel combustion burner according to claim 1, wherein the outer circumferential surface of the flame stabilizer is the inner circumferential surface of the secondary air supply port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21280886A JPS6370012A (en) | 1986-09-11 | 1986-09-11 | Slurry fuel burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21280886A JPS6370012A (en) | 1986-09-11 | 1986-09-11 | Slurry fuel burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6370012A true JPS6370012A (en) | 1988-03-30 |
| JPH0151732B2 JPH0151732B2 (en) | 1989-11-06 |
Family
ID=16628707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21280886A Granted JPS6370012A (en) | 1986-09-11 | 1986-09-11 | Slurry fuel burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6370012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018004095A (en) * | 2016-06-27 | 2018-01-11 | 株式会社Ihi | Burner |
-
1986
- 1986-09-11 JP JP21280886A patent/JPS6370012A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018004095A (en) * | 2016-06-27 | 2018-01-11 | 株式会社Ihi | Burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0151732B2 (en) | 1989-11-06 |
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