JPS556140A - Holding down production of nitrogen oxides in fluidized bed combustion - Google Patents
Holding down production of nitrogen oxides in fluidized bed combustionInfo
- Publication number
- JPS556140A JPS556140A JP7821378A JP7821378A JPS556140A JP S556140 A JPS556140 A JP S556140A JP 7821378 A JP7821378 A JP 7821378A JP 7821378 A JP7821378 A JP 7821378A JP S556140 A JPS556140 A JP S556140A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- air
- combustion chamber
- excess
- production
- 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.)
- Pending
Links
Abstract
PURPOSE: To effectively hold down the production of nitrogen oxides, by dividing a fluidized bed combustion chamber into plural parts and setting different air fuel ratios in the parts.
CONSTITUTION: The combustion chamber is divided into excess fuel chambers 3, 3 and excess air chambers 4, 4 by water-cooled walls 1, 2. Fuel feed pipes 5 are opened into these chambers through the water-cooled walls 1. Numerous air dispersion plates 6 are provided at the bottom of the combustion chamber to disperse air up into it. A reducing atmosphere with an air ratio of about 0.8 to 0.9 is provided in the excess fuel chamber 3, namely, the quantity of oxygen there is set insufficient to hold down the direct prodution of nitrogen monoxide from fuel and the production of nitrogen monoxide due to heat. In the upper part of the combustion chamber equipped with heat transfer tubes etc., not yet burned fuel is mixed with exhaust gas supplied from the air excess air chamber 4 so that the fuel is completely burned. The production of nitrogen oxides is greatly suppressed as a whole.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7821378A JPS556140A (en) | 1978-06-27 | 1978-06-27 | Holding down production of nitrogen oxides in fluidized bed combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7821378A JPS556140A (en) | 1978-06-27 | 1978-06-27 | Holding down production of nitrogen oxides in fluidized bed combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS556140A true JPS556140A (en) | 1980-01-17 |
Family
ID=13655759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7821378A Pending JPS556140A (en) | 1978-06-27 | 1978-06-27 | Holding down production of nitrogen oxides in fluidized bed combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS556140A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144172A2 (en) * | 1983-12-06 | 1985-06-12 | Coal Industry (Patents) Limited | Improvements in or relating to hot gas generation |
| CN101995016A (en) * | 2010-10-19 | 2011-03-30 | 重庆大学 | Circulating fluidized bed boiler device using low calorific value coal gangue for post ignition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5226022A (en) * | 1975-08-22 | 1977-02-26 | Mitsubishi Heavy Ind Ltd | Flowing combustion process with low nox |
-
1978
- 1978-06-27 JP JP7821378A patent/JPS556140A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5226022A (en) * | 1975-08-22 | 1977-02-26 | Mitsubishi Heavy Ind Ltd | Flowing combustion process with low nox |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144172A2 (en) * | 1983-12-06 | 1985-06-12 | Coal Industry (Patents) Limited | Improvements in or relating to hot gas generation |
| CN101995016A (en) * | 2010-10-19 | 2011-03-30 | 重庆大学 | Circulating fluidized bed boiler device using low calorific value coal gangue for post ignition |
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