JPH0151724B2 - - Google Patents
Info
- Publication number
- JPH0151724B2 JPH0151724B2 JP8498183A JP8498183A JPH0151724B2 JP H0151724 B2 JPH0151724 B2 JP H0151724B2 JP 8498183 A JP8498183 A JP 8498183A JP 8498183 A JP8498183 A JP 8498183A JP H0151724 B2 JPH0151724 B2 JP H0151724B2
- Authority
- JP
- Japan
- Prior art keywords
- pulverized coal
- nozzle
- tube
- compressed air
- supplied
- 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
Links
- 239000003245 coal Substances 0.000 claims description 42
- 238000005507 spraying Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 10
- 239000007921 spray Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000010349 pulsation Effects 0.000 description 5
- 238000000889 atomisation Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は、少量の圧縮空気によつて、分散性が
よく、しかも脈動を生じない安定噴霧状態が得ら
れる微粉炭噴霧装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulverized coal spraying device that can provide a stable spray state with good dispersibility and no pulsation using a small amount of compressed air.
微粉炭を噴霧させ、これを燃焼させるために
は、ホツパ内に貯えられた微粉炭を適当な方法で
定量的に噴霧ノズルに供給し、微粉炭を微小な粒
子に分散させて燃焼炉内に吹き込み、所定量の燃
焼用空気を供給して燃焼させることが必要であ
る。 In order to spray pulverized coal and burn it, the pulverized coal stored in the hopper is quantitatively supplied to the spray nozzle using an appropriate method, and the pulverized coal is dispersed into minute particles that are then introduced into the combustion furnace. It is necessary to blow and supply a predetermined amount of combustion air for combustion.
従来においては微粉炭を燃焼させるために、粉
体定量供給装置から定量的に供給される微粉炭を
エゼクタ装置を用いて空気流中に混合し、この微
粉炭混合空気を噴霧ノズルに供給し、燃焼炉内に
吹き込む方法が採用されていた。 Conventionally, in order to burn pulverized coal, pulverized coal that is quantitatively supplied from a powder quantitative supply device is mixed into an air stream using an ejector device, and this pulverized coal mixed air is supplied to a spray nozzle. The method used was to blow it into the combustion furnace.
このとき、必要に応じてノズル終端部におい
て、旋回流を与えて燃焼炉内に吹き込む方法も採
用されている。 At this time, a method is also adopted in which swirling flow is applied at the end of the nozzle and blown into the combustion furnace as needed.
しかし、このような方法を採用すると、定量供
給装置によつて微粉炭を定量的に供給しても、エ
ゼクタからノズルに至る長い管路中で、微粉炭の
輸送に脈動現象が生じ、ノズルからの微粉炭噴出
量がこれに応じて変動し、微粉炭の定量安定噴霧
を行うことができないという欠点があつた。 However, when such a method is adopted, even if the pulverized coal is supplied quantitatively by the quantitative supply device, a pulsating phenomenon occurs in the transportation of the pulverized coal in the long pipe line from the ejector to the nozzle, and the pulverized coal is transported from the nozzle to the nozzle. The amount of pulverized coal ejected fluctuates accordingly, and there was a drawback that it was not possible to perform constant and stable spraying of pulverized coal.
また、エゼクタ方式によつて微粉炭をノズルに
供給し噴霧する方法は、大量の圧縮空気を必要と
し、供給された圧縮空気のエネルギは、その大部
分がノズルへの微粉炭の輸送用に消費されてしま
い、ノズル部において微粉炭を良好な状態で分
散、噴霧させるために消費される圧縮空気のエネ
ルギは極めて小さいものであつた。 In addition, the method of supplying pulverized coal to a nozzle and spraying it using the ejector method requires a large amount of compressed air, and most of the energy of the supplied compressed air is consumed for transporting the pulverized coal to the nozzle. Therefore, the energy of the compressed air consumed in order to disperse and atomize the pulverized coal in a good condition at the nozzle portion was extremely small.
したがつて、安定噴霧が行われず、微粉炭の良
好な分散、噴霧状態を得ることが難しかつた。 Therefore, stable atomization was not performed, and it was difficult to obtain good dispersion and atomization of the pulverized coal.
本発明は以上のような従来の欠点を除去するた
めになされたもので、分散性がよく、脈動も生じ
ず、少量の圧縮空気によつて良好な安定噴霧状態
が得られるように構成した微粉炭噴霧装置を提供
することを目的としている。 The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and it provides a fine powder that has good dispersibility, does not cause pulsation, and is structured so that a good stable atomization state can be obtained with a small amount of compressed air. The purpose is to provide a charcoal spraying device.
以下、図面に示す実施例にもとづいて本発明を
詳細に説明する。 Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.
第１図は本発明の微粉炭噴霧装置の全体構造を
説明するものである。 FIG. 1 explains the overall structure of the pulverized coal spraying device of the present invention.
本図において、符号１で示すものはホツパであ
る。このホツパ１の下端にはチユーブコンベヤ２
の一端が連結されており、チユーブコンベヤ２の
他端にはノズル３が連結されている。 In this figure, what is indicated by reference numeral 1 is a hopper. At the bottom end of this hopper 1 is a tube conveyor 2.
One end of the tube conveyor 2 is connected to the other end of the tube conveyor 2, and a nozzle 3 is connected to the other end of the tube conveyor 2.
チユーブコンベヤ２はフレキシブルなチユーブ
４と、その内部に収容されたフレキシブルなスパ
イラル５とから構成されており、スパイラル５は
モータ６によつて回転される。 The tube conveyor 2 is composed of a flexible tube 4 and a flexible spiral 5 housed inside the tube, and the spiral 5 is rotated by a motor 6.
このスパイラル５の回転によりホツパ１内の微
粉炭はノズル３へ定量供給される。 By this rotation of the spiral 5, the pulverized coal in the hopper 1 is supplied to the nozzle 3 in a fixed amount.
第２図は、ノズル３の構造を拡大、断面で示す
ものである。 FIG. 2 shows the structure of the nozzle 3 in an enlarged cross-section.
本図において、ノズル３は外管７と、これに同
心円状に配置された内管８とをそなえ、前記チユ
ーブコンベヤ２は絞り部９を有する連結管１０を
介して内管８に連結されている。 In this figure, the nozzle 3 includes an outer tube 7 and an inner tube 8 disposed concentrically with the outer tube 7, and the tube conveyor 2 is connected to the inner tube 8 via a connecting tube 10 having a constricted portion 9. There is.
外管７と内管８とは管継手１１に、その先端側
を固定されており、管継手１１の先端にはノズル
チツプ１２が固定されている。このノズルチツプ
１２は管継手１１に螺着されるノズルキヤツプ１
３によつて保持されている。 The outer tube 7 and the inner tube 8 have their distal ends fixed to a pipe joint 11, and a nozzle tip 12 is fixed to the distal end of the pipe joint 11. This nozzle tip 12 is a nozzle cap 1 screwed onto the pipe joint 11.
It is held by 3.
外管７には連結管１０の近傍において圧縮空気
の供給口１４が設けられており、ここから供給さ
れた圧縮空気は管継手１１にあけられた貫通孔１
１ａを通つてノズルキヤツプ１３側に供給され
る。 The outer pipe 7 is provided with a compressed air supply port 14 near the connecting pipe 10, and the compressed air supplied from here is passed through the through hole 1 made in the pipe joint 11.
It is supplied to the nozzle cap 13 side through 1a.
ノズルチツプ１２は、その途中に絞り部１２ａ
が形成されており、この絞り部１２ａから外方に
向かつて拡大する円錐状の開口部１２ｂの基部
に、外方に向かつて傾斜した細孔１５が複数個あ
けられている。 The nozzle tip 12 has a constriction part 12a in the middle.
A plurality of outwardly inclined pores 15 are formed at the base of a conical opening 12b that expands outward from the constricted portion 12a.
また、チユーブコンベヤ２とノズル３の連結部
近傍には通風孔１６があけられている。 Further, a ventilation hole 16 is provided near the connecting portion between the tube conveyor 2 and the nozzle 3.
本実施例においては先ず圧縮空気の供給口１４
からノズル３内へ一定圧力の圧縮空気を供給して
使用する。 In this embodiment, first, the compressed air supply port 14 is
It is used by supplying compressed air at a constant pressure into the nozzle 3 from the nozzle 3.
つぎに、以上のように構成された本実施例の動
作について説明する。 Next, the operation of this embodiment configured as above will be explained.
ホツパ１から供給された微粉炭は、スパイラル
５の回転によつてノズル３側へ定量的に送られ
る。 Pulverized coal supplied from the hopper 1 is quantitatively sent to the nozzle 3 side by the rotation of the spiral 5.
この微粉炭は、ノズル３の接続部近傍にあけら
れた通風孔１６から流入する空気流に乗つて内管
８側へ送られる。この空気流は、つぎのような理
由によつて生じる。 This pulverized coal is sent to the inner tube 8 side on an air flow flowing in from a ventilation hole 16 formed near the connection part of the nozzle 3. This air flow is generated for the following reasons.
すなわち、供給口１４から供給される圧縮空気
は、外管７の内側を通り、貫通孔１１ａを経て細
孔１５からノズルチツプ１２の開口部１２ｂ側に
向かつて吹き込まれる。 That is, the compressed air supplied from the supply port 14 passes through the inside of the outer tube 7, passes through the through hole 11a, and is blown from the small hole 15 toward the opening 12b side of the nozzle tip 12.
この噴出する圧縮空気流によつて内管８内に負
圧が生じる。この負圧によつて通風孔１６から外
気が吸引され、微粉炭を送り込む空気流が生じ、
この空気流により微粉炭が空気と混合した状態で
ノズルチツプ１２から噴霧される。 A negative pressure is generated within the inner tube 8 by this ejected compressed air flow. Due to this negative pressure, outside air is sucked through the ventilation holes 16, creating an air flow that feeds the pulverized coal.
This air flow causes the pulverized coal mixed with air to be sprayed from the nozzle tip 12.
なお、連結管１０に設けた絞り部９は、通風孔
１６から流入した空気が偏流することなく均一な
状態で微粉炭と混合し、内管８内へ流出する作用
を有するものである。 Note that the constricted portion 9 provided in the connecting pipe 10 has the function of allowing the air flowing in from the ventilation hole 16 to mix with the pulverized coal in a uniform state without drifting, and to flow out into the inner pipe 8.
このように、供給される圧縮空気は微粉炭の輸
送用には直接使用されず、その保有する大きなエ
ネルギは全面的に微粉炭を分散噴霧するために費
されるので、強力な分散作用が働き良好な噴霧状
態が得られる。 In this way, the supplied compressed air is not used directly for transporting the pulverized coal, and the large amount of energy it possesses is used to disperse and atomize the pulverized coal over the entire surface, resulting in a strong dispersion effect. A good spray condition can be obtained.
また、圧縮空気は直接微粉炭の輸送には用いら
れず、空気輸送管路が短いため、微粉炭の輸送管
路中で微粉炭の濃度変化が生じることがなく、脈
動のない安定性に富む定量供給が可能となる。 In addition, compressed air is not used directly to transport the pulverized coal, and since the air transport pipe is short, there is no change in the concentration of pulverized coal in the pulverized coal transport pipe, resulting in high stability with no pulsation. Quantitative supply becomes possible.
上述の説明で明らかなように、本発明において
はチユーブコンベヤ２によつて定量的にノズル３
へ供給される微粉炭は通風孔１６から吸引される
自然通風の空気流によつてノズルチツプ１２に運
ばれ、これに細孔１５から吹き込まれる圧縮空気
によつて強力な剪断作用が働き、良好な分散噴霧
状態が得られる。 As is clear from the above explanation, in the present invention, the tube conveyor 2 quantitatively transfers the nozzle 3
The pulverized coal supplied to the nozzle tip 12 is transported to the nozzle tip 12 by the natural airflow sucked in from the ventilation holes 16, and compressed air blown from the pores 15 exerts a strong shearing action on this, resulting in a good A dispersed spray state is obtained.
したがつてこれを微粉炭の噴霧燃焼用に適用す
れば微粉炭の噴霧に脈動がなく、しかも微粉炭の
分散性がよいために燃焼用空気との混合接触がよ
く、微粉炭粒子の燃焼速度が大きくなつて効率の
よい安定性に富む短焔燃焼（燃焼が速い）をさせ
ることができる。 Therefore, if this is applied to the spray combustion of pulverized coal, there will be no pulsation in the pulverized coal spray, and since the pulverized coal has good dispersibility, it will mix well with the combustion air, and the combustion rate of the pulverized coal particles will increase. This increases the efficiency and stability of short flame combustion (fast combustion).
なお、微粉炭はその性状（炭種、粒度、湿分な
ど）によつて必ずしも微粉単体の集団として供給
されず、微粉炭は各単体粒子が団子状に固つて粒
径の大きな団粒として供給される場合もあり、こ
れがノズルをつまらせることもある。 Please note that pulverized coal is not necessarily supplied as a group of individual pulverized particles depending on its properties (coal type, particle size, moisture content, etc.), but pulverized coal is supplied as aggregates with large particle sizes in which each individual particle is solidified into a lump. This can clog the nozzle.
このような不都合を防止するためには、第２図
および第３図に示すように内管８に内側に向かつ
て突出する多数の針棒を位相を変えて設け、これ
らの針棒に団粒を衝突させて粉砕する構造を採用
すればよい。 In order to prevent such inconvenience, as shown in FIGS. 2 and 3, a large number of needle bars protruding inwardly are provided in the inner tube 8 with different phases, and aggregates are applied to these needle bars. What is necessary is to adopt a structure in which the particles are collided and crushed.
第２図に示す１７a1，１７a2，１７a3および１
７b1，１７b2，１７b3はそれぞれ針棒１７の形状
の一例を示すものであり、第３図は針棒１７b1，
１７b2，１７b3の内管８への取り付け状況の一例
を示すものである。 17a 1 , 17a 2 , 17a 3 and 1 shown in Figure 2
7b 1 , 17b 2 , and 17b 3 each show an example of the shape of the needle bar 17, and FIG. 3 shows the shape of the needle bar 17b 1 ,
An example of how 17b 2 and 17b 3 are attached to the inner tube 8 is shown.
以上の説明から明らかなように本発明によれ
ば、ホツパとノズルとの間をチユーブコンベヤに
よつて連結し、チユーブコンベヤの終端部に通風
孔を設け、絞り部を介してノズルの内管に連結
し、内管の先端には外周部から内方に向かつて吹
き込まれる圧縮空気により内管内に負圧を生じさ
せる構造をそなえたノズルチツプが設けられてい
るので、微粉炭の分散性がよく、脈動が生じず、
良好な微粉炭の安定定量噴霧を行うことができ
る。 As is clear from the above description, according to the present invention, the hopper and the nozzle are connected by a tube conveyor, a ventilation hole is provided at the end of the tube conveyor, and the tube is connected to the inner tube of the nozzle through the constriction part. A nozzle tip is provided at the tip of the inner tube, which has a structure that generates negative pressure in the inner tube by compressed air blown inward from the outer periphery, resulting in good dispersion of pulverized coal. No pulsation,
It is possible to perform stable and quantitative spraying of fine pulverized coal.
また、圧縮空気は微粉炭の輸送には用いないた
めに少量の空気しか必要とせず、装置も小型化さ
れ、経済的である。 Furthermore, since compressed air is not used for transporting pulverized coal, only a small amount of air is required, and the device is also compact and economical.
第１図は本発明の一実施例を説明する概略構成
図、第２図はノズル部分の拡大縦断側面図であ
り、第３図は針棒の取り付け状況を示す断面図で
ある。
１はホツパ、２はチユーブコンベヤ、３はノズ
ル、４はチユーブ、５はスパイラル、６はモー
タ、７は外管、８は内管、９は絞り部、１０は連
結管、１１は管継手、１１ａは管継手の貫通孔、
１２はノズルチツプ、１２ａはノズルチツプの絞
り部、１２ｂはノズルチツプの開口部、１３はノ
ズルキヤツプ、１４は圧縮空気の供給口、１５は
ノズルチツプの細孔、１６は通風孔、１７は針
棒、１７a1，１７a2，１７a3はカギ状に曲折した
針棒、１７b1，１７b2，１７b3は直線状の針棒で
ある。
FIG. 1 is a schematic configuration diagram illustrating an embodiment of the present invention, FIG. 2 is an enlarged longitudinal sectional side view of a nozzle portion, and FIG. 3 is a sectional view showing how a needle bar is attached. 1 is a hopper, 2 is a tube conveyor, 3 is a nozzle, 4 is a tube, 5 is a spiral, 6 is a motor, 7 is an outer tube, 8 is an inner tube, 9 is a constriction part, 10 is a connecting pipe, 11 is a pipe joint, 11a is a through hole of a pipe joint;
12 is a nozzle chip, 12a is a constriction part of the nozzle chip, 12b is an opening of the nozzle chip, 13 is a nozzle cap, 14 is a compressed air supply port, 15 is a pore of the nozzle chip, 16 is a ventilation hole, 17 is a needle bar, 17a 1 , 17a 2 , 17a 3 are bent needle bars in a hook shape, and 17b 1 , 17b 2 , 17b 3 are straight needle bars.
Claims (1)
よつて連結し、チユーブコンベヤのチユーブの終
端部に大気に連通する通風孔を設け、チユーブの
終端に絞り部を設けてノズルの内管に連結し、内
管の先端には外周部から内方に向かつて吹き込ま
せる圧縮空気によつて内管内に負圧を生じさせる
構造のノズルチツプを設けたことを特徴とする微
粉炭噴霧装置。 ２ 内管の内部に微粉炭の団粒を粉砕する針棒を
位相を変えて多段に設けたことを特徴とする特許
請求の範囲第１項記載の微粉炭噴霧装置。[Claims] 1. The hopper and the nozzle are connected by a tube conveyor, a ventilation hole communicating with the atmosphere is provided at the end of the tube of the tube conveyor, a constriction is provided at the end of the tube, and the nozzle is connected by a tube conveyor. A pulverized coal spraying device, which is connected to an inner pipe and has a nozzle tip at the tip of the inner pipe configured to generate negative pressure in the inner pipe by compressed air blown inward from the outer periphery. . 2. The pulverized coal spraying device according to claim 1, characterized in that needle bars for pulverizing pulverized coal aggregates are provided in multiple stages with different phases inside the inner tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8498183A JPS59212610A (en) | 1983-05-17 | 1983-05-17 | Pulverized coal atomizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8498183A JPS59212610A (en) | 1983-05-17 | 1983-05-17 | Pulverized coal atomizing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59212610A JPS59212610A (en) | 1984-12-01 |
| JPH0151724B2 true JPH0151724B2 (en) | 1989-11-06 |
Family
ID=13845786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8498183A Granted JPS59212610A (en) | 1983-05-17 | 1983-05-17 | Pulverized coal atomizing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59212610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160003159A (en) * | 2013-06-05 | 2016-01-08 | 가부시키가이샤 상기 | Hand piece for spraying powder |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3520781A1 (en) * | 1985-06-10 | 1986-12-11 | Stubinen Utveckling AB, Stockholm | METHOD AND DEVICE FOR BURNING LIQUID AND / OR SOLID FUELS IN POWDERED FORM |
| CN102563623B (en) * | 2012-01-06 | 2014-10-08 | 中山市益盛精工制造有限公司 | Energy-saving self-control oil burning system |
-
1983
- 1983-05-17 JP JP8498183A patent/JPS59212610A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160003159A (en) * | 2013-06-05 | 2016-01-08 | 가부시키가이샤 상기 | Hand piece for spraying powder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59212610A (en) | 1984-12-01 |
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