JPS6229683B2 - - Google Patents
Info
- Publication number
- JPS6229683B2 JPS6229683B2 JP13501981A JP13501981A JPS6229683B2 JP S6229683 B2 JPS6229683 B2 JP S6229683B2 JP 13501981 A JP13501981 A JP 13501981A JP 13501981 A JP13501981 A JP 13501981A JP S6229683 B2 JPS6229683 B2 JP S6229683B2
- Authority
- JP
- Japan
- Prior art keywords
- pulverized coal
- combustion
- stage
- stage combustion
- combustion chamber
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
- F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/10—Furnace staging
- F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Description
【発明の詳細な説明】
本発明は、微粉炭燃焼室の構造に係り、特に２
段燃焼を行う微粉炭燃焼室の改良に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a pulverized coal combustion chamber, and particularly to the structure of a pulverized coal combustion chamber.
This invention relates to improvements in pulverized coal combustion chambers that perform staged combustion.
微粉炭燃焼に於ける低NOX化は、低NOXバー
ナ、２段燃焼及び排ガス循環などが有効である。
低NOXバーナは、微粉炭と燃焼用空気の混合を制
御して火炎温度を平準化し、特にサーマルNOXを
低減するものであり、２段燃焼は、バーナ近くの
空気比つまりO2の分圧を下げてサーマルNOX及
びフユーエルNOXを低減するものであり、排ガス
循環は火炎温度の平準化と、微粉炭と燃焼用空気
の混合を促進することによつてNOXを低減するも
のである。 Effective ways to reduce NOx in pulverized coal combustion include low NOx burners, two-stage combustion, and exhaust gas circulation.
Low NO _ It reduces thermal NOx and fuel NOx by lowering the pressure, and exhaust gas circulation reduces NOx by leveling the flame temperature and promoting mixing of pulverized coal and combustion air. be.
然し乍ら、微粉炭燃焼に於けるこれらの低NOX
対策は、何れも火炎温度を下げ、特に２段燃焼域
の火炎温度をも下げるので、NOXは低減しても灰
中の未燃分は増加することになる。また２段燃焼
域では、１段燃焼域で微粉炭中の揮発分が燃焼し
た残りのチヤーが燃えるのであるが、この２段燃
焼域が低温になるので、チヤーが十分に燃焼せ
ず、灰中の未燃分が増えるものである。 However, these low NOx in pulverized coal combustion
All countermeasures lower the flame temperature, especially the flame temperature in the second stage combustion zone, so even if NOx is reduced, the unburned content in the ash will increase. In addition, in the second-stage combustion zone, the remaining chire that remains after the volatile matter in the pulverized coal is burned in the first-stage combustion zone is burned, but since the second-stage combustion zone is at a low temperature, the chire is not fully combusted and the ash remains. This increases the amount of unburned matter inside.
本発明はかかる従来の微粉炭の低NOX燃焼の欠
点を解消する為になされたもので、微粉炭燃焼室
の２段燃焼域の微粉炭燃焼温度を高温に保つこと
ができるようにした微粉炭燃焼室の構造を提供せ
んとするものである。 The present invention was made in order to eliminate the drawbacks of the conventional low NOx combustion of pulverized coal. The purpose is to provide a structure for a charcoal combustion chamber.
以下本発明による微粉炭燃焼室の構造の一実施
例を図によつて詳述する。１は微粉炭燃焼室で、
通常水冷壁で囲まれ、微粉炭バーナ２を備えてい
る。そして低NOX化対策として２段燃焼用空気が
空気吹込口３により図示の位置に供給されるよう
になつている。 An embodiment of the structure of a pulverized coal combustion chamber according to the present invention will be described below in detail with reference to the drawings. 1 is a pulverized coal combustion chamber,
It is usually surrounded by water-cooled walls and equipped with a pulverized coal burner 2. As a measure to reduce NOx , air for two-stage combustion is supplied to the position shown in the figure through the air inlet 3.
かかる微粉炭燃焼室１で低NOX化の２段燃焼を
行うと、微粉炭バーナ２の近辺及び空気吹込口３
の領域つまり２段燃焼域Ａの燃焼温度が下るの
で、この２段燃焼域Ａの水冷壁の内周面に断熱耐
火材４を内張りする。 When two-stage combustion for low NO
Since the combustion temperature in the region of , that is, the second stage combustion zone A is lowered, the inner peripheral surface of the water-cooled wall of this second stage combustion zone A is lined with a heat insulating refractory material 4.
かくして微粉炭燃焼室１の２段燃焼域Ａに於け
る微粉炭燃焼により生じた熱が断熱耐火材４に遮
断されて水冷壁に吸収されないので、２段燃焼域
Ａの微粉炭燃焼温度が高温に保たれ、その結果チ
ヤーが十分に燃焼し、灰中の未燃分が著しく減少
する。 In this way, the heat generated by pulverized coal combustion in the second stage combustion zone A of the pulverized coal combustion chamber 1 is blocked by the heat insulating refractory material 4 and is not absorbed by the water cooling wall, so that the pulverized coal combustion temperature in the second stage combustion zone A becomes high. As a result, the char is sufficiently combusted and the unburned content in the ash is significantly reduced.
以上詳記した通り本発明の微粉炭燃焼室の構造
は、２段燃焼を行う水冷壁で囲まれた微粉炭燃焼
室の２段燃焼域の水冷壁の内周面に断熱耐火材を
内張りして、この２段燃焼域の燃焼温度を高める
ようにしたものであるから、チヤーが十分に燃焼
し、灰中の未燃分が著しく減少するという優れた
効果がある。 As detailed above, the structure of the pulverized coal combustion chamber of the present invention is such that the inner peripheral surface of the water-cooled wall in the second stage combustion area of the pulverized coal combustion chamber surrounded by the water-cooled wall for performing two-stage combustion is lined with a heat insulating and refractory material. Since the combustion temperature in this two-stage combustion zone is raised, the char is sufficiently combusted and the unburned content in the ash is significantly reduced, which is an excellent effect.
図は本発明による微粉炭燃焼室の構造の一実施
例を示す概略図である。
１……微粉炭燃焼室、２……微粉炭バーナ、３
……２段燃焼用空気の吹込口、４……耐火材、Ａ
……２段燃焼域。
The figure is a schematic diagram showing an embodiment of the structure of a pulverized coal combustion chamber according to the present invention. 1...pulverized coal combustion chamber, 2...pulverized coal burner, 3
...Second-stage combustion air inlet, 4...Refractory material, A
...Two-stage combustion area.
Claims (1)
室に於いて、２段燃焼域の水冷壁の内周面に断熱
耐火材を内張りし、前記２段燃焼域の燃焼温度を
高めるようにしたことを特徴とする微粉炭燃焼室
の構造。1. In a pulverized coal combustion chamber surrounded by a water-cooled wall that performs two-stage combustion, the inner peripheral surface of the water-cooled wall in the second-stage combustion zone is lined with a heat-insulating refractory material to increase the combustion temperature in the second-stage combustion zone. The structure of the pulverized coal combustion chamber is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13501981A JPS5837409A (en) | 1981-08-28 | 1981-08-28 | Structure of pulverized coal combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13501981A JPS5837409A (en) | 1981-08-28 | 1981-08-28 | Structure of pulverized coal combustion chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5837409A JPS5837409A (en) | 1983-03-04 |
| JPS6229683B2 true JPS6229683B2 (en) | 1987-06-27 |
Family
ID=15142025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13501981A Granted JPS5837409A (en) | 1981-08-28 | 1981-08-28 | Structure of pulverized coal combustion chamber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5837409A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6375405A (en) * | 1986-09-18 | 1988-04-05 | Hitachi Zosen Corp | Small-type pulverized coal combustion furnace |
| JP6009706B1 (en) * | 2015-10-26 | 2016-10-19 | ファイア・アップ株式会社 | Combustion furnace |
-
1981
- 1981-08-28 JP JP13501981A patent/JPS5837409A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5837409A (en) | 1983-03-04 |
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