JPS5721714A - Pulverized coal firing boiler - Google Patents
Pulverized coal firing boilerInfo
- Publication number
- JPS5721714A JPS5721714A JP9562780A JP9562780A JPS5721714A JP S5721714 A JPS5721714 A JP S5721714A JP 9562780 A JP9562780 A JP 9562780A JP 9562780 A JP9562780 A JP 9562780A JP S5721714 A JPS5721714 A JP S5721714A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- combustion exhaust
- pulverized coal
- coal
- high temperature
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/04—Heating fuel prior to delivery to combustion apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
PURPOSE:To prevent the danger of dust explosion, suppress the generation of NOX, unnecessitate an air preheater and simplify the structure or the like by a method wherein the combustion exhaust gas is recirculated as a high temperature medium in the pulverized coal firing boiler. CONSTITUTION:The combustion exhaust gas is used as the high temperature medium for carrying, drying and burning of pulverized coal. The recirculating exhaust gas is sucked by means of a draft fan 10 through an combustion exhaust gas recirculating gas duct 14, the intake port of which is provided at the inlet or outlet of an economizer 3, mixed with the air from a bypass duct 12 and, after being controlled to suitable temperature, sent to a pulverizer 11. The coal is fed from a feeder 19 to the pulverizer 11, pulverized therewith, dried and carried by the high temperature combustion exhaust gas through a pipe 17 to a burner 20 and spouted from the burner 20 into a furnace 1 to be burnt. Because the combustion exhaust gas having a low oxygen concentration is used for carrying and drying of the pulverized coal, the danger of dust explosion is almost eliminated and also the burning itself proceeds under the condition that the exhaust gas having a low oxygen concentration inactivates around the pplverized coal, resulting in inhibiting the remarkable suppressing effect to the production of NOX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9562780A JPS5721714A (en) | 1980-07-15 | 1980-07-15 | Pulverized coal firing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9562780A JPS5721714A (en) | 1980-07-15 | 1980-07-15 | Pulverized coal firing boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5721714A true JPS5721714A (en) | 1982-02-04 |
Family
ID=14142753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9562780A Pending JPS5721714A (en) | 1980-07-15 | 1980-07-15 | Pulverized coal firing boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5721714A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998485A (en) * | 1990-08-01 | 1991-03-12 | Williams Robert M | Method of disposing of and apparatus for grinding moisture bearing waste material and using heat from burning waste material to reduce moisture content thereof |
| CN103925605A (en) * | 2014-04-04 | 2014-07-16 | 西安西热锅炉环保工程有限公司 | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through pulverized coal burning |
| CN103925606A (en) * | 2014-04-04 | 2014-07-16 | 西安西热锅炉环保工程有限公司 | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through coal gas burning |
-
1980
- 1980-07-15 JP JP9562780A patent/JPS5721714A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998485A (en) * | 1990-08-01 | 1991-03-12 | Williams Robert M | Method of disposing of and apparatus for grinding moisture bearing waste material and using heat from burning waste material to reduce moisture content thereof |
| CN103925605A (en) * | 2014-04-04 | 2014-07-16 | 西安西热锅炉环保工程有限公司 | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through pulverized coal burning |
| CN103925606A (en) * | 2014-04-04 | 2014-07-16 | 西安西热锅炉环保工程有限公司 | High-moisture lignite medium-speed coal mill pulverizing system heating primary air through coal gas burning |
| CN103925605B (en) * | 2014-04-04 | 2016-03-23 | 西安西热锅炉环保工程有限公司 | Coal dust firing adds the high water content brown coal medium-speed pulverizer pulverized coal preparation system of heat primary air |
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