CN1869512A - Method for supplying high-temp air for direct burning pulverized-coal of pulverized-coal boiler - Google Patents
Method for supplying high-temp air for direct burning pulverized-coal of pulverized-coal boiler Download PDFInfo
- Publication number
- CN1869512A CN1869512A CN 200510011811 CN200510011811A CN1869512A CN 1869512 A CN1869512 A CN 1869512A CN 200510011811 CN200510011811 CN 200510011811 CN 200510011811 A CN200510011811 A CN 200510011811A CN 1869512 A CN1869512 A CN 1869512A
- Authority
- CN
- China
- Prior art keywords
- air
- coal
- pulverized
- temperature
- 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.)
- Granted
Links
Abstract
The invention relate to a method to supply high temperature air by directly burning coal powder in coal powder boiler. The feature is that: adding air that the excess air coefficient is 1.1-3.5 to circulating fluid bed combustion chamber, sending the high temperature low oxygen air to combustion chamber of coal powder boiler after separating circulating ash to ignite the coal powder. The high temperature low oxygen air is 800-1400 degree centigrade and oxygen content is 2-15%. The invention could realize coal powder boiler ignition without oil, and also could be used as steady firing method of low volatile matter coal.
Description
Technical field
The present invention relates to a kind of method that high temperature air is provided for the coal dust direct combustion of pulverized-coal fired boiler.
Technical background
The high-temperature low-oxygen air burning is a kind of novel combustion technology, is that the high temperature air that will be preheating to 800-1000 ℃ sprays into the combustion chamber, and combustion chamber air oxygen content is at 2-15%.High-temperature and low-oxygen combustion is acquired diabatic process in the combustion chamber from thermodynamics, power, compares with traditional combustion process (air contains oxygen 21%, is preheated to below 400 ℃), and obvious difference is all arranged.These are characterized as significantly, and fuel saving, recovery waste heat, reduction pollutant emission, development of new heat energy utilization approach provide unprecedented condition.
At present, the method that high temperature air is provided mainly is to utilize the heat storage technology, the sensible heat of high-temperature flue gas is passed to heat storage, when normal temperature air blasts, absorb the heat that is stored in the heat storage again, thereby realize the high temperature preheating of so-called " limit waste heat recovery " and combustion air.
At the high temperature air coal dust direct combustion technology of pulverized-coal fired boiler is that HTAC from Industrial Stoves gains enlightenment, and high temperature air is sprayed into boiler-burner, thereby realize non-oil ignition.But owing to contain flying dust in the flue gas that coal powder boiler combustion produces, should not be used to heat heat-accumulating burner, therefore utilizing the heat storage technology to reclaim smoke pre-heating is unfavorable for pulverized-coal fired boiler provides high temperature air, and this has brought a difficult problem with regard to the development of giving high temperature air coal dust direct combustion technology.
Summary of the invention
The objective of the invention is to propose a kind of high temperature air that is different from heat storage fully provides method, does not adopt heat storage to add hot-air, but utilizes the circulating fluidized bed combustor burning to produce high-temperature oxygen-enriched flue gas (high-temperature low-oxygen air).This method is in the combustion process of fuel in circulating fluidized bed combustor, add excessive air (excess air coefficient is 1.1-3.5), and the high-temperature low-oxygen air of the suitable high temperature coal dust direct combustion of acquisition temperature and oxygen content, temperature and oxygen content can be regulated within the specific limits as required, again it is sprayed in the burner, firing coal-dust is realized the pulverized-coal fired boiler non-oil ignition, the steady combustion measure that also can be used as underrun and use low-volatile coal.
Technical scheme of the present invention is as follows:
The method that high temperature air is provided for the coal dust direct combustion of pulverized-coal fired boiler provided by the invention, it is characterized in that, adding fuel and excess air coefficient are the air of 1.1-3.5 in the circulating fluidized bed combustor of thermal insulation, the high-temperature low-oxygen air that burning produces is sent into the burner of pulverized-coal fired boiler, the coal dust in the pulverized-coal fired boiler that ignites after isolating circulating ash.The temperature of described high-temperature low-oxygen air is 800-1400 ℃, and its oxygen content is 2%-15%.
Principle of the present invention is: the combustion chamber is under the adiabatci condition, and the heat that fuel combustion produces all is used to heat excess air, according to excess air coefficient α and flue gas oxygen content O
2Between relation: α=21/ (21-O
2), excess air coefficient is big more, and then flue gas oxygen content is high more.There is unique relationships between excess air coefficient and the flue-gas temperature simultaneously, by regulating air capacity and the fuel quantity that adds circulating fluidized bed combustor, temperature and the oxygen content that can regulate flue gas.
Provided by the invention for the coal dust direct combustion of pulverized-coal fired boiler provides the method for high temperature air, its advantage is:
Method of the present invention is in the combustion process of fuel in circulating fluidized bed combustor, add excessive air (excess air coefficient is 1.1-3.5), and the high-temperature low-oxygen air of the suitable high temperature coal dust direct combustion of acquisition temperature and oxygen content, temperature and oxygen content can be regulated within the specific limits as required, again it is sprayed in the burner, firing coal-dust is realized the pulverized-coal fired boiler non-oil ignition, the steady combustion measure that also can be used as underrun and use low-volatile coal.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention;
Wherein: circulating fluidized bed combustor 1 separator 2
Fuel A air B high-temperature low-oxygen air C
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is a schematic flow sheet of the present invention, as seen from the figure, embodiments of the present invention are to add fuel A and excess air coefficient is the air B of 1.1-3.5 in the circulating fluidized bed combustor 1 of thermal insulation, the high-temperature low-oxygen air C that burning produces is after separator 2 is isolated circulating ash, send into coal powder fired boiler burner, coal dust ignites.
Embodiment 1:
Fuel A (coals of calorific value 4000 kilocalories) is joined in the adiabatic circulating fluidized bed combustor 1 by the bottom of circulating fluidized bed combustor, and to feed excess air coefficient by the bottom of circulating fluidized bed combustor be 1.11 air B, after separator 2 is isolated circulating ash, can obtain temperature and be 1400 ℃, oxygen content and be 2% high-temperature low-oxygen air C.
Embodiment 2:
With fuel A (coals of calorific value 3000 kilocalories), join in the adiabatic circulating fluidized bed combustor 1, and to feed excess air coefficient be 2.1 air B, after separator 2 is isolated circulating ash, can obtain temperature and be 1100 ℃, oxygen content and be 11% high-temperature low-oxygen air C.
Embodiment 3:
With fuel A (coals of calorific value 5000 kilocalories), join in the adiabatic circulating fluidized bed combustor 1, and to feed excess air coefficient be 3.0 air B, after separator 2 is isolated circulating ash, can obtain temperature and be 900 ℃, oxygen content and be 14% high-temperature low-oxygen air C.
Embodiment 4:
With fuel A (coals of calorific value 6000 kilocalories), join in the adiabatic circulating fluidized bed combustor 1, and to feed excess air coefficient be 3.5 air B, after separator 2 is isolated circulating ash, can obtain temperature and be 800 ℃, oxygen content and be 15% high-temperature low-oxygen air C.
Claims (2)
1, a kind of method that high temperature air is provided for the coal dust direct combustion of pulverized-coal fired boiler, it is characterized in that, adding fuel and excess air coefficient are the air of 1.1-3.5 in the circulating fluidized bed combustor of thermal insulation, the high-temperature low-oxygen air that burning produces is sent into the burner of pulverized-coal fired boiler, the coal dust in the pulverized-coal fired boiler that ignites after isolating circulating ash.
2, it is characterized in that for the high temperature air coal dust direct combustion of pulverized-coal fired boiler provides the method for high temperature air the temperature of described high-temperature low-oxygen air is 800-1400 ℃ by claim 1 is described, its oxygen content is 2%-15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100118112A CN100396993C (en) | 2005-05-27 | 2005-05-27 | Method for supplying high-temp air for direct burning pulverized-coal of pulverized-coal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100118112A CN100396993C (en) | 2005-05-27 | 2005-05-27 | Method for supplying high-temp air for direct burning pulverized-coal of pulverized-coal boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1869512A true CN1869512A (en) | 2006-11-29 |
| CN100396993C CN100396993C (en) | 2008-06-25 |
Family
ID=37443244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100118112A Expired - Fee Related CN100396993C (en) | 2005-05-27 | 2005-05-27 | Method for supplying high-temp air for direct burning pulverized-coal of pulverized-coal boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100396993C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532663A (en) * | 2009-03-02 | 2009-09-16 | 章礼道 | Oil-free ignition system of circulating fluidized bed boiler using red slag generator |
| CN101158468B (en) * | 2007-09-30 | 2011-08-31 | 中国科学院工程热物理研究所 | Coal fines high-temperature pre-warming method |
| CN104791775A (en) * | 2015-04-10 | 2015-07-22 | 中国科学院工程热物理研究所 | Vertical pulverized coal boiler with burner arranged at bottom |
| CN105202575A (en) * | 2015-10-13 | 2015-12-30 | 徐州科融环境资源股份有限公司 | Ignition method and device through high-temperature high oxygen torch generated by coal powder or crushed coal combustion |
| CN104667835B (en) * | 2013-11-28 | 2017-01-18 | 中国科学院工程热物理研究所 | Fluidized material circulation loop and fluidized material circulation method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3872787D1 (en) * | 1987-01-22 | 1992-08-20 | Saarbergwerke Ag | COMBUSTION OF COAL WITH A FLUIDIZED BURNER. |
| JP3825263B2 (en) * | 2001-01-30 | 2006-09-27 | 三菱重工業株式会社 | Gasification and melting equipment |
| CN1407274A (en) * | 2001-09-05 | 2003-04-02 | 清华同方股份有限公司 | Coal powder direct supplying burner |
| CN1126907C (en) * | 2001-09-21 | 2003-11-05 | 清华大学 | Industrial furnace with high-temperature low-oxygen air burner |
| CN2527867Y (en) * | 2002-03-23 | 2002-12-25 | 李文蛟 | Oil-less direct ignition burner for coal powder-fired boiler |
| JP2004332972A (en) * | 2003-05-01 | 2004-11-25 | Atsuyuki Kobayashi | Combustion method of pulverized coal |
| JP2005016750A (en) * | 2003-06-23 | 2005-01-20 | Babcock Hitachi Kk | Method and device for solid fuel combustion |
| JP2005037040A (en) * | 2003-07-14 | 2005-02-10 | Ishikawajima Harima Heavy Ind Co Ltd | Pulverized coal combustor |
-
2005
- 2005-05-27 CN CNB2005100118112A patent/CN100396993C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101158468B (en) * | 2007-09-30 | 2011-08-31 | 中国科学院工程热物理研究所 | Coal fines high-temperature pre-warming method |
| CN101532663A (en) * | 2009-03-02 | 2009-09-16 | 章礼道 | Oil-free ignition system of circulating fluidized bed boiler using red slag generator |
| CN101532663B (en) * | 2009-03-02 | 2013-08-14 | 章礼道 | Oil-free ignition system of circulating fluidized bed boiler using red slag generator |
| CN104667835B (en) * | 2013-11-28 | 2017-01-18 | 中国科学院工程热物理研究所 | Fluidized material circulation loop and fluidized material circulation method |
| CN104791775A (en) * | 2015-04-10 | 2015-07-22 | 中国科学院工程热物理研究所 | Vertical pulverized coal boiler with burner arranged at bottom |
| CN104791775B (en) * | 2015-04-10 | 2018-03-23 | 中国科学院工程热物理研究所 | The vertical pulverized-coal fired boiler that burner bottom is put |
| CN105202575A (en) * | 2015-10-13 | 2015-12-30 | 徐州科融环境资源股份有限公司 | Ignition method and device through high-temperature high oxygen torch generated by coal powder or crushed coal combustion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100396993C (en) | 2008-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100504164C (en) | Coal firing method with low emission for nitrous oxides | |
| CN100396993C (en) | Method for supplying high-temp air for direct burning pulverized-coal of pulverized-coal boiler | |
| CN104315502A (en) | Biomass low-temperature pre-burning low-volatile inferior coal low-NOx combustion device | |
| CN203116087U (en) | Biomass pyrolysis double-fluidized-bed ignition system | |
| CN204187609U (en) | The low NO of a kind of living beings low temperature pre-burning low volatile low-grade coal xburner | |
| CN101354129A (en) | Biomass and fire coal composite fuel boiler | |
| CN1804459A (en) | Method and apparatus for re-burning denitration of coal water slurry | |
| CN210398893U (en) | Biomass direct-fired boiler | |
| CN101592337A (en) | Internal combustion ignition pulverized coal burner | |
| CN202938289U (en) | Fuel-saving ignition device of circulating fluidized bed boiler | |
| CN203731661U (en) | Automatic feeding biomass boiler | |
| CN202532478U (en) | Kiln alcohol group fuel combustion machine | |
| CN1804467A (en) | Cracking ignition device for pulverized coal fired boiler | |
| CN201772617U (en) | Carbon and hydrogen co-combustion pressure boiler | |
| CN100424155C (en) | Technical method for using slurry of water and charred coal as boiler fuel for extracting heat and injecting steam through thick oil | |
| CN217441628U (en) | Ultra-low load stable combustion device of coal-fired boiler | |
| CN204084456U (en) | The micro oil ignition system of generating plant pulverized coal boiler cold state spark and low-load combustion-stabilizing | |
| CN202328359U (en) | Oil-free ignition and oil-free stable combustion system of pulverized coal fired boiler | |
| CN210740376U (en) | Biomass mixed fuel fluidization ignition system of circulating fluidized bed boiler | |
| CN203560895U (en) | Coal-saving device for coal-fired boiler | |
| CN2847084Y (en) | Cracking igniter for coal powder boiler | |
| CN212929974U (en) | Environment-friendly smokeless energy-saving full-automatic boiler suitable for gasification of various fuels | |
| CN102980205B (en) | Technology and device for cold-state ignition of low-emission boiler | |
| CN203628629U (en) | Coal saving device for coal burning boiler | |
| CN2738109Y (en) | Pulverized-coal cracking reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |