JPS57166409A - Low nox boiler - Google Patents
Low nox boilerInfo
- Publication number
- JPS57166409A JPS57166409A JP56051222A JP5122281A JPS57166409A JP S57166409 A JPS57166409 A JP S57166409A JP 56051222 A JP56051222 A JP 56051222A JP 5122281 A JP5122281 A JP 5122281A JP S57166409 A JPS57166409 A JP S57166409A
- Authority
- JP
- Japan
- Prior art keywords
- burners
- low
- value
- damper
- supplied
- 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.)
- Granted
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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
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)
Abstract
PURPOSE:To restrain the NOx value at medium and low load operations to a low value and protect burners from high temperature atmosphere by a method wherein a controlling box is provided controlling the cooling of the burners, which are extinguished and put out of operation, by supplying recirculation exhause gas alone thereto. CONSTITUTION:Twenty-four burners are provided at the frong wall side and twenty- four burners at the rear wall side of the large size low NOx boiler. The burners are arranged in four rows, each of which consists of two groups: the group of burners A1, A2 and A3 and the group of burners A4, A5 and A6. The flow rate of mixture gas to be supplied to a burner is individually controlled with dampers 3A1, 3B, .... The controlling of the recirculation gas to be supplied to the group of burners A1, A2 and A3 is performed with a damper 3ARG13. When the grup of burners A1, A2 and A3 is extinguished and put out of operation, only the recirculation exhaust gas is supplied to the burners A1, A2 and A3 by closing a damper 3A13 and opening the damper 3ARG13 in order to cool them. As a result, the NOx value in exhaust gas can be restrained to remarkably low value at medium and low load operations and yet the necessary operation for realizaton of low NOx value is performed only by operating the dampers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56051222A JPS57166409A (en) | 1981-04-07 | 1981-04-07 | Low nox boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56051222A JPS57166409A (en) | 1981-04-07 | 1981-04-07 | Low nox boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57166409A true JPS57166409A (en) | 1982-10-13 |
| JPH0117046B2 JPH0117046B2 (en) | 1989-03-28 |
Family
ID=12880902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56051222A Granted JPS57166409A (en) | 1981-04-07 | 1981-04-07 | Low nox boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57166409A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185710U (en) * | 1982-06-04 | 1983-12-09 | 三菱重工業株式会社 | gas fuel combustion equipment |
| JPS6069411A (en) * | 1983-08-31 | 1985-04-20 | Mitsubishi Heavy Ind Ltd | Burner device |
| JPS6397012U (en) * | 1986-12-08 | 1988-06-23 | ||
| JP2011089711A (en) * | 2009-10-22 | 2011-05-06 | Hitachi Ltd | Method for modifying pulverized coal boiler |
-
1981
- 1981-04-07 JP JP56051222A patent/JPS57166409A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185710U (en) * | 1982-06-04 | 1983-12-09 | 三菱重工業株式会社 | gas fuel combustion equipment |
| JPS6069411A (en) * | 1983-08-31 | 1985-04-20 | Mitsubishi Heavy Ind Ltd | Burner device |
| JPH0468526B2 (en) * | 1983-08-31 | 1992-11-02 | Mitsubishi Heavy Ind Ltd | |
| JPS6397012U (en) * | 1986-12-08 | 1988-06-23 | ||
| JP2011089711A (en) * | 2009-10-22 | 2011-05-06 | Hitachi Ltd | Method for modifying pulverized coal boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0117046B2 (en) | 1989-03-28 |
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