JPS6082163A - Composite nozzle for ejecting powder - Google Patents

Abstract

PURPOSE:To perform effective powder dispersion and ejection without hole clogging by constructing a composite nozzle of a long-sized pipe assembly, sucking, guiding and mixing the powder to and with the inside of a high pressure gas to be ejected and dispersing and radiating the powder spray to a wide angle. CONSTITUTION:A powder supply pipe 5 is concentrically inserted into the 1st nozzle 1 along the central axial line thereof and a powder ejecting nozzle is provided in the small-diameter nozzle part between the contracted flow part and expanded flow part of the 1st nozzle. The powder from the powder ejecting hole 11 continuously sucked and mixed by the negative pressure developed when the high pressure gas passing through the 1st nozzle 1 from the upper stream side passes through the space between the pipe 5 and the small-diameter nozzle part. The mixed fluid thereof is ejected from the ejecting hole 11 of the 2nd nozzle 9. The powder is more finely pulverized by the composite collision that arises when the powder is admitted into a fluid disperser 12 and the pulverized powder is dispersed in the form of a thin film at a wide angle to the outside.

Description

【発明の詳細な説明】 技術分野 本発明は、１つの軸線方向に連設した２つのノズルと、
これら両ノズルの最下流側に設けた流体分散器とを組合
わせ、粉体な薄膜広角に噴響分散させる複合ノズルに関
し、特にボイラー用、工、乍炉用の微粉炭などの粉体燃
料の噴謄ノズルとして有効に適用することのできる粉体
噴射複合ノズルに関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to two nozzles connected in one axial direction;
A composite nozzle that combines both of these nozzles with a fluid disperser installed at the most downstream side to disperse jets over a wide angle in a thin film of powder is used, especially for powdered fuel such as pulverized coal for boilers, industrial plants, and furnaces. The present invention relates to a powder injection composite nozzle that can be effectively applied as an injection nozzle.

従来技術 従来、２つのノズルと流体分散器とを其えた床台ノズル
は、特許第１０３４３２７号（燃焼装置６：）で公知で
ある。上記第１０３４３２７号においては、第１のノズ
ル（第１０３４３２７号のノズル部５）への粉体供給は
、外周から半径方向にもうけた欲供給管に液に代えて粉
体を供給することによって行なうことができるが、ノズ
ルを装着用長管に挿入して使用する構造の粉体噴射装置
に、保合ノズルを挿入しようとすると粉体供給管がつか
えて挿入できない。BACKGROUND OF THE INVENTION A bed nozzle with two nozzles and a fluid distributor is known from patent no. 1034327 (Combustion device 6:). In the above-mentioned No. 1034327, powder is supplied to the first nozzle (nozzle part 5 of No. 1034327) by supplying powder instead of liquid to a supply pipe provided radially from the outer periphery. However, when attempting to insert the retaining nozzle into a powder injection device that is used by inserting the nozzle into a long mounting tube, the powder supply tube gets stuck and cannot be inserted.

また、粉体噴射用高圧ガスの負圧効果を、より有効に生
せしめ、粉体の吸収誘出量を増ＵＩ３するために、上記
高圧ガスの流れの中に、同一方向に粉体供給管をもうけ
、中心軸にＩｖ１１％％’に開口する粉体噴出孔をもう
けることが必要であシ、上述した特許第１０３４３２７
号のものを粉体の噴射用に用いる場合には粉体性状に合
わせて改善が必−妥となる。In addition, in order to more effectively produce the negative pressure effect of the high-pressure gas for powder injection and increase the amount of powder absorbed and extracted, a powder supply pipe is installed in the same direction in the flow of the high-pressure gas. It is necessary to provide a powder ejection hole opening at Iv 11%%' on the central axis, and the above-mentioned patent No. 1034327
When using the product No. 2 for powder injection, it is necessary to make improvements according to the powder properties.

発明の目的、４Ｍ成、作用効果 依って、本発明の目的ｔよノズル装着用畏管内に挿入使
用でさるように略一本の長尺管組体の構造に形成し、噴
射用高圧ガス中への物体の吸収誘出１１Ｌ合効果を同上
せしめると共に粉体Ｉ＋！！１務を広角分散して放射す
るり合ノズルを提供せんとするものである。According to the object of the invention, 4M structure, operation and effect, the object of the present invention is to form a structure of approximately one long tube assembly so that it can be inserted into a tube for installing a nozzle, and to immerse it in high pressure gas for injection. The absorption and induction of the object into the 11L combined effect is the same as above, and the powder I+! ! The present invention aims to provide a joint nozzle that emits a single beam in a wide-angle and dispersed manner.

不発明によれは、匠体の縮流部とぞの縮θ１１：部に続
いて流体の拡流部を弔゛する第１のノズルと、前記第１
のノズルの１罰Ｌ　ｉｔ！Ｉに第２０＾１流部を有する
第２のノズルを結合し、第２のノズルの下流端の噴出孔
と対向して流体分散器を具えた顎片ノズルにおいて、 前記第１のノズルの中心軸線に沿って粉体供給管を同心
状に内挿し、前記粉体供給管の粉体供給孔を中心軸に対
して同心に開口せしめて前記第１のノズルの最狭部すな
わち、小径ノズル部に位ｉｉニア：せしめ、前記第１の
ノズル内を通して上ｖｉｔ　１ｌｌｌｌから世相される
粉体噴射用高圧ガスを、上記粉体供給管と上記小径ノズ
ル部との隙間を高速で、＋ｌｉ７過ぜしめるときに流体
力学的に生ずる負圧吸引効果によって粉体を、上記粉体
供給孔から上ｎ己高圧ガスｖＩＬ中に誘出、混合し、前
口己第２ノズルと前記分散器との組合せによって生せし
めることができる混合流体核合衝災、すなわち第２のノ
ズルからの噴出混合流体の流体分散器への流入衝突と、
この衝突によって生ずる反射流体と、上記噴出混合６！
を体の後続流との再衝突による複合悔突によって、粉体
を一層、微細化するものである。According to the non-invention, a first nozzle that directs a fluid widening part following the contraction θ11: part of the body, and the first nozzle.
1 penalty for the nozzle L it! A jaw piece nozzle in which a second nozzle having a 20^1 flow section is coupled to I, and a fluid distributor is provided opposite to a jet hole at a downstream end of the second nozzle, the center of the first nozzle A powder supply pipe is inserted concentrically along the axis, and the powder supply hole of the powder supply pipe is opened concentrically with respect to the central axis to form the narrowest part of the first nozzle, that is, the small diameter nozzle part. ii Near: High pressure gas for powder injection is passed through the first nozzle from above and passed through the gap between the powder supply pipe and the small diameter nozzle part at a high speed. The powder is drawn out from the powder supply hole into the upper high-pressure gas VIL by a negative pressure suction effect that sometimes occurs hydrodynamically, and is mixed with the powder by the combination of the front opening, the second nozzle, and the disperser. a mixed fluid nuclear collision that can occur, i.e. an inflow collision of the mixed fluid ejected from the second nozzle into the fluid distributor;
The reflected fluid generated by this collision and the jetted mixture 6!
By re-colliding with the trailing flow of the powder, the powder is further refined.

また、前記噴出混合流体を前ｍｌ流体分散器によって薄
膜広角に外部へ分散させることができるから広範囲への
粉体分数が可能となシ、故に本発明の保合ノズルによっ
て燃焼用微粉炭の噴射を行なうＪ、、Ａ合、微粉体と燃
焼用空気との混合ＩＬ極めて良好に行なうことができる
。In addition, since the ejected mixed fluid can be dispersed to the outside in a thin film and wide angle by the pre-ml fluid disperser, it is possible to disperse the powder fraction over a wide range. In cases J, A, mixing of the fine powder and combustion air can be carried out very well.

本発明ノズルは、ノズル装着用長管を有する構造の燃焼
装置、！１ヶにボイラー用の燃焼装置などに適用できる
。The nozzle of the present invention is a combustion device having a structure having a long pipe for mounting the nozzle. It can be applied to combustion equipment for boilers, etc.

然しながら、これら燃焼装置における粉体燃料ｖｎｑｔ
用ノズルとして適用するのみならず、粉体撚科以外の粉
体処理装置ｉ’ｊにおける粉体噴射ノズルや種々の薬粉
噴射ノズルとして広く適用できることは勿論でおる。However, powdered fuel vnqt in these combustion devices
It goes without saying that the present invention can be widely applied not only as a nozzle for industrial use, but also as a powder injection nozzle in powder processing equipment i'j other than powder twisting, and as various powder injection nozzles.

実施例 以下、本発明を図に示す芙ｈ４例に基いて計則に説明す
る。EXAMPLES Hereinafter, the present invention will be explained in detail based on four examples shown in the figures.

さて、図は本発明による粉体噴射イ反合ノズルの実施例
を示す縦断面図であシ、同図において、１は流体の縮流
部２およびこれに続いて形成された拡流部３を有する第
１のノズルで、上６Ｃ縮流部２と拡流部３との間に小径
ノズルが形成さｉしている。Now, the figure is a longitudinal sectional view showing an embodiment of the powder injection reaction nozzle according to the present invention. In the figure, 1 is a fluid contraction part 2 and a flow expansion part 3 formed subsequently A small diameter nozzle is formed between the upper 6C flow contraction part 2 and the flow expansion part 3.

上記の第１のノズル１は、円筒管形状の外筒４の内１１
！！ｌに滑合低着されている。５は粉体供給管で、半径
方向に３本の圓（図では２本のみ示す）を持つ支持枠６
によって粉体噴射用高圧ガス？７７の中心に上流側から
下流側に延設、支持され、その粉体供給管５の下ｐｌｔ
　１１１’ｌ先端紘中心軸に直角に開口した粉体供給孔
８を形成している。この粉体供給孔８の軸方向位置は、
小径ノズル部２′と一致した位置に来るように第１のノ
ズル１の長さと、上記粉体供給管５の第１のノズル１内
における突出長さとの関係が決められている。上記第１
のノズル１０丁流側において、外筒４に螺着結合した形
態で第２のノズル９が設けられ、販第２のノズル９は第
２の縮流部ｌＯを有し、まだその易２の＃、ＩＪ流部１
０の下流側の先端に粉体混合流のｎＲ出孔１１を有して
いる。゛まだ上記噴出孔１１と対向して空洞型流体分散
器１２が支持棒１３は半径方向にそれぞれ３本の脚１４
および１５（図ではそれぞれ２本のみが明示しである）
を有する２つの支持枠１６（下流側）および１７（上Ｍ
ＥＩＩＩＩ）によって第２のノズル９の中心に安定に支
持されている。この支持棒１３は、下流側の支持枠１６
とγ１ｔシ結合されているが、上流＋１１１１の支持枠
１７とはねじ結合で支持されており、墾洞型流体分散器
１２を回転させることにより、支持棒１３が第２のノズ
ル９の中心軸線上を前後に移動し、第２のノズル９の′
ＩＣ１出孔１１と空洞型流体分散器１２との間の爪群ｔ
を大きくすると、Ｍ１１Δ広角分１１ｋかＣ８の分散角
αは小さく設定でき、またこのｔを小さくすると、分散
角αを大きく設＞ｔできるので、これによって分散流Ｓ
の分散角αを、例えｔよ燃焼装置ｒフの撚焼空間規横に
合わせて適宜に調４さ設定することができるのである。The first nozzle 1 includes an inner 11 of the outer tube 4 having a cylindrical tube shape.
! ! It is attached to the l. 5 is a powder supply pipe, and a support frame 6 has three circles in the radial direction (only two are shown in the figure).
By high pressure gas for powder injection? 77 extending from the upstream side to the downstream side, and the lower plt of the powder supply pipe 5
111'l A powder supply hole 8 is formed perpendicularly to the center axis of the tip hole. The axial position of this powder supply hole 8 is
The relationship between the length of the first nozzle 1 and the protrusion length of the powder supply pipe 5 in the first nozzle 1 is determined so that the first nozzle 1 is located at a position that coincides with the small diameter nozzle portion 2'. 1st above
On the flow side of the nozzle 10, a second nozzle 9 is provided in the form of a screw connection to the outer cylinder 4, and the second nozzle 9 has a second flow convergence part lO, and still has the second nozzle 9. #, IJ flow part 1
0 has an nR outlet hole 11 for powder mixed flow at the downstream end of the nR outlet.゛The cavity type fluid distributor 12 is still facing the above-mentioned jet hole 11, and the support rod 13 has three legs 14 in the radial direction.
and 15 (only two of each are clearly shown in the figure)
Two support frames 16 (downstream side) and 17 (upper M
EIII) is stably supported at the center of the second nozzle 9. This support rod 13 is attached to a support frame 16 on the downstream side.
γ1t is connected to the upstream +1111 support frame 17 by screw connection, and by rotating the hollow-type fluid distributor 12, the support rod 13 is connected to the central axis of the second nozzle 9. ’ of the second nozzle 9 by moving back and forth on the line.
Claw group t between IC1 outlet 11 and cavity type fluid distributor 12
By increasing t, the dispersion angle α of M11Δ wide angle 11k or C8 can be set small, and by decreasing t, the dispersion angle α can be set large.
The dispersion angle α can be adjusted appropriately according to the twisting space regulation of the combustion device R, for example.

１８はロック用ナツトで、上記の距１ｌＩｌｔをυ・１
聚設＞ｙ後に同だするものである。１９は本複合ノズル
の装着用長管を示したもので、例えばボイラー用燃焼装
置等に一般に用いられている構造のものである。そして
２０は上記装着用長管１９の中心と本複合ノズルの中心
とを整合させるための位置決め枕である。18 is a locking nut, and the above distance 1lIlt is υ・1
It is the same after construction > y. Reference numeral 19 indicates a long pipe for mounting the present composite nozzle, which has a structure generally used, for example, in combustion equipment for boilers. And 20 is a positioning pillow for aligning the center of the long tube 19 for installation with the center of this composite nozzle.

上述の説明から明らかなように本発明による複合ノズル
はその内部に粉体供給管を崩した一本の長尺管構造体と
して形成されているので燃焼装ｆ１°ｉの装着用長管に
内挿装着する際にも何らの障害々く取付けでき、しかも
従来の係合ノズルと同様に孔づまりの無い有効な粉体分
散および噴射装置ホとして用いることができるのである
。As is clear from the above description, the composite nozzle according to the present invention is formed as a single long tube structure in which the powder supply tube is broken down, so that the compound nozzle according to the present invention is formed as a single long tube structure in which the powder supply tube is collapsed. It can be installed without any hindrance when it is inserted and installed, and it can be used as an effective powder dispersion and injection device without clogging, like conventional engagement nozzles.

【図面の簡単な説明】[Brief explanation of the drawing]

図をよ本発明による粉体噴射複合ノズルの実施例を示ず
縦１ｌｉｔｒ囲図である。 １・・・第１のノズル、２・・・縮流部、２′・・・最
狭部、３・・・拡流部、５・・・粉体供給管、７・・・
粉体噴射用高圧ガス管、８・・・粉体惧組孔、９・・・
第２のノズル、１０・・・第２の縮流部、１１・・・ｌ
１ｌｊ出孔、１２・・・空洞型流体分散器。 手続補正書く自発） 昭和５８年／１月２６０ 特許庁長官　若　杉　ＺＵ　夫　殿 １、事件の表示 昭和５８年　特許願　第１８９８３０号２、発明の名称 粉体１１Ｚ（射複合ノズル ３、補正をする者 事件との関係　特許出願人 名　称　三菱プレシジョン株式会社 ４、代理人 ５、補正の対象 （１）　明細１の「発明の詳細な説明」の欄（２）図面 ６、補正の内容 ＋１．ｌ　明細書路７頁３行目に記載した「分散器１２
が」のあとに「支持棒１３の先端に取付は固定されてい
る。」を挿入The figure is a vertical 1 liter diagram without showing an embodiment of the powder injection composite nozzle according to the present invention. DESCRIPTION OF SYMBOLS 1... First nozzle, 2... Contraction part, 2'... Narrowest part, 3... Widening part, 5... Powder supply pipe, 7...
High pressure gas pipe for powder injection, 8...Powder end hole, 9...
Second nozzle, 10...Second contraction section, 11...l
1lj outlet, 12... Cavity type fluid distributor. 1985/January 260 Commissioner of the Patent Office Wakasugi ZU Huo 1, Indication of the case 1989 Patent Application No. 189830 2, Name of the invention Powder 11Z (Injection compound nozzle 3, Make amendments) Relationship with the Patent Case Patent Applicant Name Mitsubishi Precision Co., Ltd. 4, Agent 5, Subject of Amendment (1) Detailed Description of the Invention in Specification 1 (2) Drawing 6, Contents of Amendment + 1.1 Specification "Distributor 12" written on page 7, line 3 of the calligraphy
Insert "The attachment is fixed to the tip of the support rod 13" after "."

【、ます。 （２）図面を朱書のように一方の参照布＋′ｊ】０を１
２に補正します。 ７、　添伺書類の目録 補正図面　１　通【,Masu. (2) Draw the drawing like red calligraphy on one side of the reference cloth +′j】0 to 1
Correct it to 2. 7. 1 copy of the revised drawing for the catalog of accompanying documents

Claims (1)

【特許請求の範囲】 １、流体の縮流部とその縮流部に続いて流体の拡流部を
有する第１のノズルと、前記第１のノズ・ルの下流側に
第２の縮流部を有する第２のノズルを結合し、第２のノ
ズルの下流端の噴出孔と対向してυ１ｔ、体分散器を具
えた複合ノズルにおいて、前記第１のノズルの中心軸線
に沿って粉体供給管を同心状に内挿し、前記粉体供給管
の中心軸に対して同心配置で開口した粉体噴出孔を前記
第１のノズルの縮流部と拡流部との間に設けた小径ノズ
ル部に位置せしめ、前記第１のノズル内を通して上流側
から供給される高圧ガスが上記粉体供給′ｃ？と小径ノ
ズル部の隙間を高速で通過せしめるときに流体力学的に
生ずる負圧効果によって、上記粉体噴出孔から１分体を
連続的に吸引して上記高圧ガスυｉｉ：中へ誘出′６１
５合せしめて混合？ｊｆｉ：体を生成し、１、に混行ｖ
：Ｃ体が０＋＋記第２ノズルの１貝出孔から１算出して
、前記流体分散器に流入するときに生ずる代置衝突によ
って粉体のよシ微細化を生ぜしめ、外部へ薄膜広角に分
散させることを特徴とする粉体噴射複合ノズル。 ２、特許請求の範囲第１項に記載のノズルにおいて前記
流体分散器は粉体衝突部に空洞を具備したものである粉
体噴射複合ノズル。[Claims] 1. A first nozzle having a fluid contraction part and a fluid expansion part following the fluid contraction part, and a second contraction flow part downstream of the first nozzle; In a composite nozzle, a second nozzle having a body dispersion unit is coupled to a second nozzle having a second nozzle, and a body disperser is disposed opposite to the ejection hole at the downstream end of the second nozzle. A supply pipe is inserted concentrically into the powder supply pipe, and a small diameter powder jetting hole is provided between the flow contraction part and the flow expansion part of the first nozzle, and the powder injection hole is opened concentrically with respect to the central axis of the powder supply pipe. The high-pressure gas located in the nozzle portion and supplied from the upstream side through the first nozzle is used to supply the powder 'c? Due to the negative pressure effect generated hydrodynamically when the powder passes through the gap between the powder and the small-diameter nozzle at high speed, the powder is continuously sucked from the powder ejection hole and drawn into the high-pressure gas υii:'61
5. Tighten and mix? jfi: generate a field, mix v with 1,
: When the C body enters the fluid dispersing device by 1 calculation from the 1 shell exit hole of the second nozzle shown in 0++, the displacement collision that occurs causes the powder to become finer and becomes a thin film to the outside. A powder injection composite nozzle characterized by dispersion. 2. A powder injection composite nozzle according to claim 1, wherein the fluid disperser has a cavity in the powder collision part.