JPH037686Y2 - - Google Patents
Info
- Publication number
- JPH037686Y2 JPH037686Y2 JP8446485U JP8446485U JPH037686Y2 JP H037686 Y2 JPH037686 Y2 JP H037686Y2 JP 8446485 U JP8446485 U JP 8446485U JP 8446485 U JP8446485 U JP 8446485U JP H037686 Y2 JPH037686 Y2 JP H037686Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- nozzle
- drum
- flat mirror
- mirror plate
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 4
- 239000008400 supply water Substances 0.000 claims 1
- 238000013021 overheating Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、陸、舶用水管ボイラに利用され、と
くに水管ボイラ下部管板の過熱を防止し得るボイ
ラの蒸気泡分散装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a steam bubble dispersion device for a boiler that is used in land and marine water tube boilers, and is particularly capable of preventing overheating of the lower tube sheet of the water tube boiler.
第３図に示すように燃焼室ａ下部に水ドラムｂ
を配置し、この水ドラムｂの平鏡板ｃを下部管板
として利用する構造の水管ボイラにおいては、燃
焼室ａ内の火焔ｄの放射熱によつて水ドラムｂ内
に蒸気泡ｅが発生し、この蒸気泡ｅが平鏡板ｃ内
側下面に密集するため、平鏡板ｃが加熱され焼損
を起こすおそれがあつた。
As shown in Figure 3, a water drum b is placed at the bottom of the combustion chamber a.
In a water tube boiler with a structure in which the flat mirror plate c of the water drum b is used as the lower tube plate, steam bubbles e are generated in the water drum b by the radiant heat of the flame d in the combustion chamber a. Since the vapor bubbles e were concentrated on the inner lower surface of the flat mirror plate c, there was a risk that the flat mirror plate c would be heated and burnt out.
この問題を回避するため、開口部をベルマウス
状に拡大させた給水管ｆを水ドラムｂ内に配置
し、この給水管ｆから給水流（矢印ｇ）を平鏡板
ｃ下面に吹き付けて蒸気泡ｅを分散させる対策が
従来より実施されてきた。なお、図中、ｒは蒸気
ドラム、ｓは各種水管、ｔはバーナを示す。 In order to avoid this problem, a water supply pipe f with an enlarged opening in the shape of a bell mouth is placed inside the water drum b, and a water flow (arrow g) is blown from the water supply pipe f onto the lower surface of the flat mirror plate c to form steam bubbles. Countermeasures to disperse e have been implemented in the past. In the figure, r indicates a steam drum, s indicates various water pipes, and t indicates a burner.
しかし、前述の対策によると水ドラムｂ内の、
飽和水温度よりも遥かに低い温度の給水が平鏡板
ｃに直接当るため、平鏡板ｃ上下面の温度差がさ
らに拡大、助長され、熱応力的に不利となる問題
点があつた。
However, according to the above-mentioned measures, inside the water drum b,
Since the supplied water at a temperature much lower than the saturated water temperature directly hits the flat mirror plate c, the temperature difference between the upper and lower surfaces of the flat mirror plate c is further expanded and exacerbated, which is disadvantageous in terms of thermal stress.
本考案は前述の問題点を解決するためになした
もので、燃焼室下部に設けた水ドラム内に該水ド
ラム管板にほぼ直角になるように配置され、上、
下端に開口を設けたノズルと、給水の一部を前記
ノズル下端開口近傍に吹き出す給水吹出し管とを
備え、前記ノズル上、下部の縦断面形状を上、下
方向に向つてそれぞれ拡大するベルマウス状に形
成したものである。
The present invention was made to solve the above-mentioned problems, and is arranged in a water drum provided at the bottom of the combustion chamber so as to be almost perpendicular to the water drum tube plate.
A bell mouth comprising a nozzle with an opening at the lower end, and a water supply pipe that blows out a portion of the water supply near the opening at the lower end of the nozzle, the vertical cross-sectional shape of the upper and lower parts of the nozzle expanding upward and downward, respectively. It is formed into a shape.
給水力を利用して缶水をノズル内に誘引し、ノ
ズル内で缶水と給水とを混合し、給水温度より遥
かに高温度の混合水を水ドラム下部管板下面に吹
き付けるので、下部管板上、下面の温度差を拡大
させることなく、前記管板下面に密集する蒸気泡
を分散させることができ、下部管板の過熱、焼損
を防止できる。
The canned water is drawn into the nozzle using the water supply power, the canned water and the supplied water are mixed in the nozzle, and the mixed water, which is much higher in temperature than the supplied water temperature, is sprayed onto the lower surface of the lower tube plate of the water drum. It is possible to disperse the steam bubbles concentrated on the lower surface of the tube sheet without increasing the temperature difference between the upper and lower surfaces of the plate, and it is possible to prevent overheating and burnout of the lower tube sheet.
以下、本考案の実施例を図面に基づいて説明す
る。第１図および第２図に示すように水管ボイラ
は、上、下部にそれぞれ配置した円環状の蒸気ド
ラム１および椀形の水ドラム２と、燃焼室３の周
りに管列をそれぞれ形成して上下方向に延び前記
各ドラム１，２間を接続する水壁管４、蒸発管
５、非加熱降水管６などからなり、さらに燃焼室
３の上、下部にそれぞれバーナ７および耐火材８
が配置されている。
Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in Figures 1 and 2, a water tube boiler consists of an annular steam drum 1 and a bowl-shaped water drum 2 placed at the top and bottom, respectively, and a row of tubes formed around a combustion chamber 3. It consists of a water wall pipe 4, an evaporator pipe 5, an unheated downcomer pipe 6, etc. which extend in the vertical direction and connect between the drums 1 and 2, and a burner 7 and a refractory material 8 are installed above and below the combustion chamber 3, respectively.
is located.
水ドラム２の中心部には、上、下端がベルマウ
ス状に開口したノズル９が図示しない支持金物に
よつて水ドラム中心線ｈと同心に配置され、ノズ
ル９の下端開口近傍に給水管１２により分岐した
給水吹出し管１３が開口している。なお、給水吹
出し管１３の分岐部には流量調節用のオリフイス
１４が配置されている。 At the center of the water drum 2, a nozzle 9 whose upper and lower ends are opened in a bell-mouth shape is arranged concentrically with the water drum center line h by means of supporting hardware (not shown). A water supply blow-off pipe 13 branched by is open. Note that an orifice 14 for flow rate adjustment is arranged at a branch portion of the water supply blow-off pipe 13.
次に、本装置の作動について説明する。ボイラ
運転中、給水は給水管１２を径て蒸気ドラム１に
供給され、この際、給水の一部は給水吹出し管１
３からノズル９入口に向つて噴射され（矢印ｉ）、
この噴射水はノズル入口近傍の缶水をノズル９内
に誘引して（矢印ｊ）ノズル９内で噴射水と缶水
を混合させる。そして、この混合水が平鏡板１０
下面に吹き付けられ（矢印ｋ）蒸気泡１５を吹き
散らす。平鏡板１０に吹き付けられた混合水の温
度は給水温度に較べて遥かに高温度になつている
ので、平鏡板１０上下面の温度差を過度に拡大さ
せることがない。また、蒸気泡１５の分散によつ
て平鏡板１０下面の冷却が促進されるので過熱、
焼損を起こすおそれがない。 Next, the operation of this device will be explained. During boiler operation, feed water is supplied to the steam drum 1 through the water supply pipe 12, and at this time, part of the feed water is supplied to the steam drum 1 through the water supply pipe 1.
3 toward the inlet of the nozzle 9 (arrow i),
This jetted water attracts the canned water near the nozzle inlet into the nozzle 9 (arrow j) and mixes the jetted water and the canned water within the nozzle 9. Then, this mixed water is added to the flat mirror plate 10.
It is sprayed onto the lower surface (arrow k) to scatter steam bubbles 15. Since the temperature of the mixed water sprayed onto the flat mirror plate 10 is much higher than the temperature of the water supply, the temperature difference between the upper and lower surfaces of the flat mirror plate 10 does not increase excessively. In addition, the dispersion of the vapor bubbles 15 promotes cooling of the lower surface of the flat mirror plate 10, thereby preventing overheating.
There is no risk of burnout.
なお、本考案は前述の実施例に限定されるもの
ではなく、例えば平鏡板の面積が大きい場合はノ
ズルを複数個配置してもよいことなど、その他本
考案の要旨を逸脱しない範囲において種種の変更
を加え得ることは勿論である。 Note that the present invention is not limited to the above-mentioned embodiments; for example, if the flat mirror plate has a large area, a plurality of nozzles may be arranged. Of course, modifications can be made.
以上に述べたごとく、本考案は次の優れた効果
を発揮する。
As described above, the present invention exhibits the following excellent effects.
(i) 給水の一部をノズルに吹き込み、給水と缶水
を混合させて燃焼室下部管板の吹き付けるの
で、下部管板下面に密着する蒸気泡を吹き払
い、管板の過熱、焼損を防止することができ
る。(i) A portion of the feed water is blown into the nozzle, and the feed water and canned water are mixed and sprayed onto the lower tube sheet of the combustion chamber, thereby blowing away steam bubbles that adhere to the bottom surface of the lower tube sheet and preventing overheating and burnout of the tube sheet. can do.
(ii) 給水と缶水の混合物を下部管板に吹き付ける
ので、下部管板上下面の温度差を過度に拡大さ
せるおそれがない。(ii) Since the mixture of supplied water and canned water is sprayed onto the lower tube sheet, there is no risk of excessively increasing the temperature difference between the upper and lower surfaces of the lower tube sheet.
第１図および第２図は本考案の実施例を示し、
第１図は水管ボイラの切断側面図、第２図は第１
図における−方向からの矢視図、第３図は従
来の蒸気泡分散対策を施した水管、ボイラの切断
側面図である。
図中、２は水ドラム、３は燃焼室、９はノズ
ル、１０は平鏡板を示す。
1 and 2 show an embodiment of the present invention,
Figure 1 is a cutaway side view of the water tube boiler, Figure 2 is the
FIG. 3 is a cross-sectional side view of a water pipe and a boiler equipped with conventional steam bubble dispersion measures. In the figure, 2 is a water drum, 3 is a combustion chamber, 9 is a nozzle, and 10 is a flat mirror plate.
Claims (1)
板にほぼ直角になるように配置され、上、下端に
開口を設けたノズルと、給水の一部を前記ノズル
下端開口近傍に吹き出す給水吹出し管とを備え、
前記ノズル上、下部の縦断面形状を上、下方向に
向つてそれぞれ拡大するベルマウス状に形成した
ことを特徴とするボイラの蒸気泡分散装置。 A nozzle is arranged in a water drum provided at the lower part of the combustion chamber so as to be substantially perpendicular to the water drum tube plate, and has openings at the upper and lower ends, and a water supply blowout that blows out a portion of the supply water near the opening at the lower end of the nozzle. and a tube;
A steam bubble dispersion device for a boiler, characterized in that the vertical cross-sectional shape of the upper and lower parts of the nozzle is formed into a bell mouth shape that expands upward and downward, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8446485U JPH037686Y2 (en) | 1985-06-04 | 1985-06-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8446485U JPH037686Y2 (en) | 1985-06-04 | 1985-06-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61204113U JPS61204113U (en) | 1986-12-23 |
| JPH037686Y2 true JPH037686Y2 (en) | 1991-02-26 |
Family
ID=30634003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8446485U Expired JPH037686Y2 (en) | 1985-06-04 | 1985-06-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH037686Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4192107B2 (en) * | 2004-03-01 | 2008-12-03 | 東京瓦斯株式会社 | Liquid jet generator |
-
1985
- 1985-06-04 JP JP8446485U patent/JPH037686Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61204113U (en) | 1986-12-23 |
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