JP3746625B2 - Combustion device - Google Patents
Combustion device Download PDFInfo
- Publication number
- JP3746625B2 JP3746625B2 JP01340899A JP1340899A JP3746625B2 JP 3746625 B2 JP3746625 B2 JP 3746625B2 JP 01340899 A JP01340899 A JP 01340899A JP 1340899 A JP1340899 A JP 1340899A JP 3746625 B2 JP3746625 B2 JP 3746625B2
- Authority
- JP
- Japan
- Prior art keywords
- burner
- gas
- supply pipe
- gas supply
- wind box
- 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 - Fee Related
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Description
【０００１】
【発明の属する技術分野】
本発明は、たとえば火力発電プラントのボイラなどに使用されるガス燃料の燃焼装置であって、ガス供給管に減圧オリフィスが介装されているものに関する。
【０００２】
【従来の技術】
ガス燃料を燃焼するボイラなどの燃焼装置において、ガス燃料はガス貯蔵タンクから各段のガスバーナへ供給しているため、ガス供給圧力が高く、ガス供給管の途中に減圧オリフィスを介装して、ガスバーナの必要圧力まで減圧している。
【０００３】
図３に従来の燃焼装置の一例を示す。図において、１はガス供給管で、図示しないガス貯蔵タンクからボイラの低部まで導かれ、ボイラまわりの配管の各コーナー部分（４個所）から各バーナ段へ立ち上げられ、各段のガスバーナへ各々分岐して導かれるように配管されている。
【０００４】
２はバーナ弁、３は減圧オリフィスである。ガス供給管１はバーナ風箱４及び保温材５を貫通して、火炉内へ向っているガスバーナ６に接続されている。バーナ弁２の上流側からバーナ風箱４までのガス供給管１には、防音材７が施され、減圧オリフィスで発生する騒音が伝播しないようにしている。なお、８はガス供給管１の熱伸び等を吸収するためのエキスパンションジョイントである。
【０００５】
【発明が解決しようとする課題】
減圧オリフィスは上述のようにバーナ風箱接続部の上流側のガス供給管に介装され、ガス供給圧力をガスバーナの燃焼に適した圧力まで減圧するものである。この場合、ガス供給管内のガス流速によっては減圧オリフィスによる騒音が発生するため、減圧オリフィスの上流側に設置されているバーナ弁の周囲を含めバーナ風箱までの長い範囲にわたって、また各バーナ段のそれぞれのガス供給管のすべてに防音材を施工する必要があった。
【０００６】
【課題を解決するための手段】
本発明は、ガス燃料を燃焼する燃焼装置であって、次の手段（１）、（２）を提案するものである。
（１）ガス燃料を燃焼する燃焼装置であって、ガスバーナへガス燃料を供給するガス供給管に減圧オリフィスが介装されているものにおいて、前記減圧オリフィスがバーナ風箱内の前記ガス供給管に配設されていると共に、前記ガス供給管に防音材を設けずに、前記バーナ風箱に火炉内からの輻射熱を防ぐための保温材を設け、同保温材および前記バーナ風箱により前記減圧オリフィスから発生する騒音を遮音するものである。
（２）ガス燃料を燃焼する燃焼装置であって、ガスバーナへガス燃料を供給するガス供給管にバーナ弁および減圧オリフィスおよびエキスパンションジョイントがその順に介装され、前記ガス供給管はバーナ風箱および保温材を貫通して、火炉内に向かっている前記ガスバーナに接続されているものにおいて、前記ガス供給管に防音材を設けずに、前記減圧オリフィスを前記バーナ風箱内の前記ガス供給管に配設して、前記保温材および前記バーナ風箱により前記減圧オリフィスから発生する騒音を遮音するものである。
【０００７】
【発明の実施の形態】
本発明の実施の形態を第１図および第２図に基づいて説明する。１１は減圧オリフィスで、ガス供給管１に介装されており、その設置位置はバーナ風箱４内とされている。バーナ風箱４には、加熱された空気が流入されるとともに、火炉内からの輻射熱による放熱を防ぐために保温材５が施工されている。このために、減圧オリフィスから発生する騒音はバーナ風箱４内から主に火炉内部へ伝播するが、保温材５にて遮音されるため、バーナ風箱４外部には伝播しない。したがって、バーナ風箱４を貫通する位置より上流側のガス供給管１には防音材は施工されていない。
【０００８】
設計の一例として以下のような要目が適用可能である。
ガスバーナ容量６１５０ｍ３Ｎ／Ｈ
ガスバーナ圧力１．７Ｋｇ／ｍ２ｇ
減圧オリフィス（外径×長さ）１６５．２φ×２９３ｌ
減圧値１．５Ｋｇ／ｃｍ２
減圧オリフィス面積絞り比
一段目０．４８３９、二段目０．３０７２
減圧オリフィス径（径×個数）６０．９７φ×１個、３８．７φ×４個
【０００９】
【発明の効果】
本発明によれば、ガス供給管に防音材を施工することなく、減圧オリフィスから発生する騒音が外部に伝播するのを防止することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態に係る燃焼装置を示す平面図である。
【図２】図１のＡ−Ａ矢視図である。
【図３】従来の燃焼装置を示す平面図である。
【符号の説明】
１ ガス供給管
２ バーナ弁
３、１１ 減圧オリフィス
４ バーナ風箱
５ 保温材
６ ガスバーナ
７ 防音材
８ エキスパンションジョイント[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combustion apparatus for gas fuel used in, for example, a boiler of a thermal power plant, in which a pressure reducing orifice is interposed in a gas supply pipe.
[0002]
[Prior art]
In a combustion apparatus such as a boiler that burns gas fuel, since gas fuel is supplied from the gas storage tank to each stage of the gas burner, the gas supply pressure is high, and a decompression orifice is provided in the middle of the gas supply pipe, The pressure is reduced to the required pressure of the gas burner.
[0003]
FIG. 3 shows an example of a conventional combustion apparatus. In the figure, reference numeral 1 denotes a gas supply pipe, which is led from a gas storage tank (not shown) to the lower part of the boiler, is raised to each burner stage from each corner portion (four places) of piping around the boiler, and is supplied to each stage gas burner. Each pipe is branched and guided.
[0004]
2 is a burner valve, 3 is a pressure reducing orifice. The gas supply pipe 1 passes through the burner wind box 4 and the heat insulating material 5 and is connected to a
[0005]
[Problems to be solved by the invention]
As described above, the pressure reducing orifice is interposed in the gas supply pipe on the upstream side of the burner wind box connection portion, and reduces the gas supply pressure to a pressure suitable for combustion of the gas burner. In this case, noise due to the pressure reducing orifice is generated depending on the gas flow velocity in the gas supply pipe, and therefore, over a long range up to the burner wind box including the periphery of the burner valve installed on the upstream side of the pressure reducing orifice, and at each burner stage. It was necessary to install soundproofing materials on all the gas supply pipes.
[0006]
[Means for Solving the Problems]
The present invention is a combustion apparatus that burns gas fuel, and proposes the following means (1) and (2).
(1) A combustion apparatus for burning gas fuel, wherein a pressure reducing orifice is provided in a gas supply pipe for supplying the gas fuel to the gas burner, and the pressure reducing orifice is provided in the gas supply pipe in the burner wind box. In addition, a heat insulating material for preventing radiant heat from inside the furnace is provided in the burner wind box without providing a soundproof material in the gas supply pipe, and the decompression orifice is provided by the heat insulating material and the burner wind box. Ru der intended to sound insulation noise generated from.
(2) Combustion apparatus for burning gas fuel, wherein a gas supply pipe for supplying gas fuel to a gas burner is provided with a burner valve, a pressure reducing orifice and an expansion joint in that order. In the case of being connected to the gas burner passing through the material and going into the furnace, the pressure reducing orifice is arranged in the gas supply pipe in the burner wind box without providing a soundproof material in the gas supply pipe. The noise generated from the decompression orifice is insulated by the heat insulating material and the burner wind box.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIG. 1 and FIG.
[0008]
The following points can be applied as an example of design.
Gas burner capacity 6150m 3 N / H
Gas burner pressure 1.7Kg / m 2 g
Depressurized orifice (outer diameter x length) 165.2φ x 293l
Depressurized value 1.5 kg / cm 2
Pressure reduction orifice area restriction ratio 1st stage 0.4839, 2nd stage 0.3072
Reduced orifice diameter (diameter x number) 60.97φ x 1 piece, 38.7φ x 4 pieces
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the noise which generate | occur | produces from a pressure reduction orifice propagates outside, without installing a soundproof material in a gas supply pipe | tube.
[Brief description of the drawings]
FIG. 1 is a plan view showing a combustion apparatus according to an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows AA in FIG.
FIG. 3 is a plan view showing a conventional combustion apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas supply pipe 2
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01340899A JP3746625B2 (en) | 1999-01-21 | 1999-01-21 | Combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01340899A JP3746625B2 (en) | 1999-01-21 | 1999-01-21 | Combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000213733A JP2000213733A (en) | 2000-08-02 |
| JP3746625B2 true JP3746625B2 (en) | 2006-02-15 |
Family
ID=11832317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01340899A Expired - Fee Related JP3746625B2 (en) | 1999-01-21 | 1999-01-21 | Combustion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3746625B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015086968A (en) * | 2013-10-31 | 2015-05-07 | 三菱日立パワーシステムズ株式会社 | Multistage decompression device and boiler |
| JP7404586B1 (en) * | 2023-09-08 | 2023-12-25 | 三菱重工業株式会社 | Gas burner and boiler equipped with it |
-
1999
- 1999-01-21 JP JP01340899A patent/JP3746625B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000213733A (en) | 2000-08-02 |
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