JPS6217124B2 - - Google Patents
Info
- Publication number
- JPS6217124B2 JPS6217124B2 JP9948479A JP9948479A JPS6217124B2 JP S6217124 B2 JPS6217124 B2 JP S6217124B2 JP 9948479 A JP9948479 A JP 9948479A JP 9948479 A JP9948479 A JP 9948479A JP S6217124 B2 JPS6217124 B2 JP S6217124B2
- Authority
- JP
- Japan
- Prior art keywords
- com
- wear
- resistant layer
- plate
- ceramic
- 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
- 239000000919 ceramic Substances 0.000 claims description 15
- 239000000446 fuel Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000005524 ceramic coating Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Description
【発明の詳細な説明】
この発明はバーナ装置に係り、特に液体と微粉
炭の混合したスラリー燃料〔以下重油と微粉炭の
混合した「COM」（Coal Oil Mixture）を代表と
し、スラリー燃料をCOMとして記述する〕の燃
焼に好適なバーナ装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a burner device, and particularly relates to a slurry fuel that is a mixture of liquid and pulverized coal [hereinafter, COM (Coal Oil Mixture), which is a mixture of heavy oil and pulverized coal, is a representative example; This invention relates to a burner device suitable for combustion.
近年、オイルシヨツク等により石油依存が見直
され、世界的に埋蔵量の多い石炭がエネルギー源
として再び注目されている。とりわけ、石油と同
様の扱いが可能なCOMが、石炭利用の拡大要求
に応ずるものとして登場しようとしている。この
COMは石油と同様配管により輸送され、バーナ
部において噴霧、燃焼されるものである。しか
し、COMが含有する微粉炭によりバーナ、特に
バーナチツプが摩耗し、バーナの寿命を短縮する
という欠点も有している。第１図はCOM燃焼用
の従来型バーナの構造を示し、内筒４と外筒３の
間の環状空間内のCOM５はスプレーヤプレート
１に穿設した小孔のCOM噴出口１ｂより噴出
し、蒸気孔８から噴出した内筒３内の高圧蒸気Ｓ
と混合孔９内で混合され、霧状に噴出し燃焼す
る。このバーナにおいて、バーナの形成材料は高
クロム系ステンレス鋼（硬度ビツカース250〜
300）であるため、COM内の石炭粒子によつて急
速に摩耗する。この場合、特に摩耗の激しいのは
高圧のCOMが噴出するCOM噴出口１ｂであつ
て、これにより径の大きいCOM通過孔７および
混合口９においてはCOMの噴出速度が低下する
ため、摩耗の程度はCOM噴出口１ｂほどではな
いことが知られている。以上のバーナ装置に対
し、耐摩耗性を高めるため、スプレーヤプレート
１を中心として硬度の高いセラミツクでコーテイ
ングする方法が考えられるが、元来加工性の悪い
セラミツクを図示の如き複雑な形状を有するスプ
レーヤプレートにコーテイングすること自体大き
な技術的困難を伴い、かつコーテイングを施し得
た場合でも、火炎の熱をまともに受ける結果、ス
プレーヤプレートの先端部を中心として熱シヨツ
クによりセラミツクコーテイングに電裂が生ずる
虞れが高い。 In recent years, petroleum dependence has been reconsidered due to oil shocks, and coal, which has large reserves worldwide, is once again attracting attention as an energy source. In particular, COM, which can be treated in the same way as oil, is emerging as a means to meet the demand for expanded use of coal. this
Like oil, COM is transported through piping, and is sprayed and burned in the burner. However, it also has the disadvantage that the pulverized coal contained in COM wears out the burner, especially the burner tip, shortening the life of the burner. FIG. 1 shows the structure of a conventional burner for COM combustion, in which COM 5 in the annular space between the inner cylinder 4 and the outer cylinder 3 is ejected from the COM outlet 1b of a small hole drilled in the sprayer plate 1. High-pressure steam S in the inner cylinder 3 ejected from the steam hole 8
The mixture is mixed in the mixing hole 9, sprayed out in a mist, and combusted. In this burner, the material used to form the burner is high chromium stainless steel (hardness Bitkers 250~
300), it is rapidly worn away by the coal particles in the COM. In this case, it is the COM jet port 1b from which high-pressure COM is spouted that is particularly worn, and the COM jetting speed decreases at the large-diameter COM passage hole 7 and mixing port 9, so the degree of wear is is known to be not as strong as COM spout 1b. In order to improve the wear resistance of the burner device described above, it is possible to coat the sprayer plate 1 with a ceramic having a high hardness. Coating the plate itself is technically difficult, and even if the coating can be applied, there is a risk that electric cracks may occur in the ceramic coating due to the heat shock, mainly at the tip of the sprayer plate, as a result of being exposed to the heat of the flame. is high.
この発明の目的は上記した従来技術の欠点をな
くし、セラミツクにより耐摩耗処理を施し、しか
も、セラミツクから成る耐摩耗層の形成が容易な
バーナ装置に関する。 The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to relate to a burner device in which wear-resistant treatment is performed using ceramic, and in which the wear-resistant layer made of ceramic can be easily formed.
要するにこの発明は、スプレーヤプレートの
COM噴出孔を中心とした部分を別個のプレート
として形成し、この別個に形成したプレートの
COM噴出孔を中心としてセラミツクによる耐摩
耗層を形成したものである。 In short, this invention is based on the sprayer plate.
The part centered around the COM vent is formed as a separate plate, and the
A wear-resistant layer made of ceramic is formed around the COM injection hole.
以下この発明の実施例を説明する。 Examples of the present invention will be described below.
第２図は、この発明に係るバーナ装置のバーナ
チツプ部の側断面図であつて、このバーナ装置に
おいて、２はリストリクタプレート（燃料の流量
制御の効果をもつ）であつて中央部に内筒４と連
通する開口部を有し、その周囲にCOM噴出口２
ａを穿設してある。このリストリクタプレート２
のCOM噴出口２ａを中心としてセラミツクから
成る耐摩耗層が形成される。第３図は第一の耐摩
耗層の形成方法を示し、セラミツクから成る円筒
をCOM噴出口２ａに嵌押固着して耐摩耗層２０
ａを形成する。第４図は第二の形成方法を示し、
リストリクタプレート２の外面全部にセラミツク
コーテイングを施し、このセラミツクコーテイン
グにより耐摩耗層２０ｂを形成する。ここにセラ
ミツクはAl2O3（アルミナ）を主成分として（90
％以上）これにSiO2（シリカ）等の酸化物を添
加して焼結したものであつて、硬度ビツカース
1500〜22000程度の硬質材料である。以上の如く
形成した耐摩耗層を有するリストリクタプレート
２をノズルボデイ１１とスプレーヤプレート１ａ
の間に介在配置し、キヤツプナツト１０を外筒３
に螺合させることにより強固に係合固着させ、バ
ーナチツプを形成する。 FIG. 2 is a side sectional view of the burner tip portion of the burner device according to the present invention. It has an opening communicating with COM spout 2 around it.
A is drilled. This restrictor plate 2
A wear-resistant layer made of ceramic is formed around the COM spout 2a. FIG. 3 shows a method for forming the first wear-resistant layer, in which a cylinder made of ceramic is fitted and fixed to the COM spout 2a to form the wear-resistant layer 20.
form a. FIG. 4 shows the second forming method,
A ceramic coating is applied to the entire outer surface of the restrictor plate 2, and a wear-resistant layer 20b is formed by this ceramic coating. Here, ceramics are made with Al 2 O 3 (alumina) as the main component (90
% or more) and is sintered with the addition of oxides such as SiO 2 (silica), which has a hardness of bits
It is a hard material of about 1500 to 22000. The restrictor plate 2 having the wear-resistant layer formed as described above is connected to the nozzle body 11 and the sprayer plate 1a.
The cap nut 10 is interposed between the outer cylinder 3 and the cap nut 10.
By screwing them together, they are firmly engaged and fixed to form a burner tip.
このバーナ装置において、リストリクタプレー
ト２のCOM噴出孔２ａから噴出するCOMの噴出
圧力は14〜21Kg／cm2ｇとかなり高いが、セラミツ
クにより耐摩耗層が形成されているので摩耗率は
非常に低くなつている。続いてCOM通過孔７お
よび混合孔９においては、噴霧圧力は５〜７Kg／
cm2ｇ程度に低減されるので、摩耗率は低く、スプ
レーヤプレート１ａの形成材料は高クロム系ステ
ンレス鋼で十分対処できる。ちなみに、COM噴
出孔部分を高クロム系ステンレスで形成したもの
にあつては、運転前2.2mmφの孔径のものが10時
間の使用で2.8mm×3.9mmの長円となつてしまい使
用不能となつた。これに対し、セラミツクの耐摩
耗層を有するCOM噴出孔によつた場合、150時間
以上の使用に耐えることが判明し、バーナチツプ
の寿命を大巾に延すことが確認された。 In this burner device, the ejection pressure of COM ejected from the COM ejection hole 2a of the restrictor plate 2 is quite high at 14 to 21 kg/cm 2 g, but since a wear-resistant layer is formed by ceramic, the wear rate is extremely low. It's getting lower. Subsequently, in the COM passage hole 7 and the mixing hole 9, the spray pressure is 5 to 7 kg/
Since the wear rate is reduced to about cm 2 g, the wear rate is low, and high chromium stainless steel can be used as the material for forming the sprayer plate 1a. By the way, for the COM nozzle part made of high chromium stainless steel, the hole diameter was 2.2mmφ before operation, but after 10 hours of use it became an oval of 2.8mm x 3.9mm, making it unusable. Ta. On the other hand, when the burner tip was installed in a COM nozzle with a ceramic wear-resistant layer, it was found that it could withstand use for more than 150 hours, and it was confirmed that the lifespan of the burner chip could be greatly extended.
この発明によれば、COMにより摩耗を大巾に
減少させることができ、バーナの寿命を大巾に延
長させることができる。 According to this invention, wear can be greatly reduced by the COM, and the life of the burner can be greatly extended.
またセラミツクによる耐摩耗層を形成するリス
トリクタプレートはスプレーヤプレートに比較し
て非常に単純な形状となつているため、耐摩耗層
の形成が容易である。 Further, since the restrictor plate forming the abrasion resistant layer made of ceramic has a much simpler shape than the sprayer plate, the abrasion resistant layer can be easily formed.
さらに耐摩耗層は直接火炎に接する部分には施
していないため、熱シヨツクによる耐摩耗層のひ
び割れ、および剥離等の問題が生じない。 Furthermore, since the wear-resistant layer is not applied to the parts that come into direct contact with the flame, problems such as cracking and peeling of the wear-resistant layer due to heat shock do not occur.
第１図は従来のCOM用バーナ装置の側断面部
分図、第２図はこの発明に係るバーナ装置の側面
部分図、第３図は円筒状のセラミツクをCOM噴
出孔に嵌挿したリストリクタプレートの側断面
図、第４図は全面にセラミツクコーテイングを施
したリストリクタプレートの側断面図である。
１，１ａ…スプレーヤプレート、２…リストリ
クタプレート、２ａ…COM噴出孔、７…COM通
過孔、９…混合孔、２０ａ，２０ｂ…セラミツク
の耐摩耗層。
Fig. 1 is a partial side cross-sectional view of a conventional burner device for COM, Fig. 2 is a partial side view of a burner device according to the present invention, and Fig. 3 is a restrictor plate in which a cylindrical ceramic is inserted into the COM jet hole. FIG. 4 is a side sectional view of a restrictor plate whose entire surface is coated with ceramic. DESCRIPTION OF SYMBOLS 1, 1a... Sprayer plate, 2... Restrictor plate, 2a... COM injection hole, 7... COM passage hole, 9... Mixing hole, 20a, 20b... Ceramic wear-resistant layer.
Claims (1)
において、スプレーヤプレートのCOM噴出孔を
有する部分を別個に形成してリストリクタプレー
トとし、このリストリクタプレートのCOM噴出
孔を中心としてセラミツクから成る耐摩耗層を形
成したことを特徴とするスラリー燃料用バーナ装
置。 ２ リストリクタプレートのCOM噴出孔にセラ
ミツク製の円筒を嵌挿固着して耐摩耗層を形成し
たことを特徴とする特許請求の範囲第１項記載の
スラリー燃料用バーナ装置。 ３ リストリクタプレートの全面にセラミツクコ
ーテイングを施して耐摩耗層を形成したことを特
徴とする特許請求の範囲第１項記載のスラリー燃
料用バーナ装置。[Scope of Claims] 1. In a burner device that sprays and burns slurry fuel, a portion of a sprayer plate having a COM nozzle is formed separately to form a restrictor plate, and a ceramic plate is formed around the COM nozzle of this restrictor plate. A burner device for slurry fuel characterized by forming a wear-resistant layer consisting of. 2. The burner device for slurry fuel according to claim 1, characterized in that a ceramic cylinder is inserted and fixed into the COM injection hole of the restrictor plate to form a wear-resistant layer. 3. The burner device for slurry fuel according to claim 1, wherein a wear-resistant layer is formed by applying ceramic coating to the entire surface of the restrictor plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9948479A JPS5623621A (en) | 1979-08-06 | 1979-08-06 | Burner device for com fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9948479A JPS5623621A (en) | 1979-08-06 | 1979-08-06 | Burner device for com fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5623621A JPS5623621A (en) | 1981-03-06 |
| JPS6217124B2 true JPS6217124B2 (en) | 1987-04-16 |
Family
ID=14248574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9948479A Granted JPS5623621A (en) | 1979-08-06 | 1979-08-06 | Burner device for com fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5623621A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63142832U (en) * | 1987-03-11 | 1988-09-20 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3265115D1 (en) * | 1981-01-06 | 1985-09-12 | Du Pont | Reinforced poly(ethylene terephthalate) compositions |
| JPS5995313A (en) * | 1982-11-25 | 1984-06-01 | Babcock Hitachi Kk | Atomizing method of solid fuel in state of slurry and its device |
-
1979
- 1979-08-06 JP JP9948479A patent/JPS5623621A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63142832U (en) * | 1987-03-11 | 1988-09-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5623621A (en) | 1981-03-06 |
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