CN104728835A - Empty bed starting technique of external bed of large circulation fluidized bed boiler - Google Patents
Empty bed starting technique of external bed of large circulation fluidized bed boiler Download PDFInfo
- Publication number
- CN104728835A CN104728835A CN201510093760.6A CN201510093760A CN104728835A CN 104728835 A CN104728835 A CN 104728835A CN 201510093760 A CN201510093760 A CN 201510093760A CN 104728835 A CN104728835 A CN 104728835A
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- CN
- China
- Prior art keywords
- bed
- boiler
- external
- starting
- technique
- 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.)
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Classifications
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- 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
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
- F23C10/30—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed
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- 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
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention belongs to the starting technique of a circulation fluidized bed boiler, and particularly relates to a rapid and safe empty bed starting method of an external bed of a large circulation fluidized bed boiler. The method is characterized in that in the unit starting process after the reparation of the boiler, bed materials are ceaselessly fed for the boiler by a bed material charging system until the thickness of the materials is 800-1000mm; meanwhile, the flue gas temperature of each part of the boiler is controlled to be lower than the combusted coal deformation and softening temperature; the bed materials in the external bed are established gradually by the material external circulation until the circulation material amount of the boiler is normal. According to the technique, the unit starting time can be shortened; oil for starting is reduced; the labor cost is reduced; meanwhile, the boiler can be prevented from coked; the safety, the economic property and the reliability of the boiler can be ensured; the starting technique has great popularization significance to the large circulation fluidized bed boiler.
Description
Technical field
The invention belongs to the start-up technique of CFBB, particularly relate to the empty bed of large circulating fluidized bed boiler external bed fast, the method for clean boot.
Background technology
The external bed bed material addition manner of large circulating fluidized bed boiler, addition are the key factors affecting unit safety, economy, startup fast.Before CFBB starts, extra bed material Main Function sets up at the boiler startup initial stage and maintains material balance, ensures that CFBB sets up initial Matter Transfer in the ignition trigger stage.
Rear startup repaiied by boiler, and bed material required in burner hearth and external bed be filled it up with and restart, the time of needs is longer, and needs the man power and material of at substantial, about 18 ~ 20 hours unit starting time, and operation cost of enterprises remains high.
During large circulating fluidized bed boiler shutdown maintenance, need to carry out abrasion inspection to boiler heating surface, need bed material emptying in stove.Rear startup repaiied by boiler, and start if all filled it up with by bed material required in external bed, the time of needs is longer again, and need the man power and material of at substantial, about 18 ~ 20 hours unit starting time, postpone the unit starting time, added the operation cost of enterprise.
Therefore explore the empty bed start-up technique of a kind of large circulating fluidized bed boiler external bed, for the energy-saving and emission-reduction of electricity power enterprise, improve boiler operating efficiency, the operation cost reducing enterprise is significant.
Summary of the invention
The object of this invention is to provide the empty bed start-up technique of a kind of large circulating fluidized bed boiler external bed, it can shorten the unit starting time, reduces startup oil, can prevent boiler coke again simultaneously, ensure boiler safety, economy, reliability.
Realizing the technical scheme that above-mentioned purpose of the present invention takes is: boiler is repaiied in rear unit starting process, progressively boiler extra bed material is given by extra bed material system, add to 800 ~ 1000mm thick, control boiler each portion flue-gas temperature simultaneously and be out of shape softening temperature lower than fire coal, pass through material outside circulation, in external bed, bed material is progressively set up, till boiler circulated material quantity is normal.
Technical scheme of the present invention also comprises: when to boiler extra bed material, and controlling bed pressure is 8 ~ 10kPa, and bed temperature is 800 ~ 900 DEG C.
Advantageous Effects of the present invention is: by above technological means, do not affect heating surface heat exchange, boiler safety, fast startup and economical operation can be guaranteed, the unit starting time can be shortened, reduce unit starting oil, reduce human cost, large circulating fluidized bed boiler is with the promotion of good sense.Practice shows, starts, can reduce startup oil about 3 ~ 5 tons/time, shorten 5 ~ 8 hours unit starting time also grid-connected in advance, produce economic benefit about 500,000 yuan the empty bed of the external bed of 300MW CFBB.
Detailed description of the invention
Embodiment: the startup after repairing for 300MW large circulating fluidized bed boiler, progressively boiler extra bed material is given by extra bed material system, boiler furnace bed material is added to 800 ~ 1000mm thick, control boiler each portion flue-gas temperature simultaneously and be out of shape softening temperature lower than fire coal, external bed can start without the need to extra bed material; By material outside circulation, in external bed, bed material is progressively set up, till boiler circulated material quantity is normal.When to boiler extra bed material, controlling bed pressure is 8 ~ 10kPa, and bed temperature is 800 ~ 900 DEG C.
Claims (2)
1. the empty bed start-up technique of large circulating fluidized bed boiler external bed, it is characterized in that: in unit starting process, progressively boiler extra bed material is given by extra bed material system, add to 800 ~ 1000mm thick, control boiler each portion flue-gas temperature simultaneously and be out of shape softening temperature lower than fire coal, by material outside circulation, in external bed, bed material is progressively set up, till boiler circulated material quantity is normal.
2., by the empty bed start-up technique of large circulating fluidized bed boiler external bed according to claim 1, it is characterized in that: when to boiler extra bed material, controlling bed pressure is 8 ~ 10kPa, and bed temperature is 800 ~ 900 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093760.6A CN104728835A (en) | 2015-03-03 | 2015-03-03 | Empty bed starting technique of external bed of large circulation fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093760.6A CN104728835A (en) | 2015-03-03 | 2015-03-03 | Empty bed starting technique of external bed of large circulation fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104728835A true CN104728835A (en) | 2015-06-24 |
Family
ID=53452989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510093760.6A Pending CN104728835A (en) | 2015-03-03 | 2015-03-03 | Empty bed starting technique of external bed of large circulation fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104728835A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2002330C2 (en) * | 2008-12-15 | 2010-06-16 | Essent En Produktie B V | GASIFICATION OF SOLID FUELS IN A CIRCULATING SPIRAL BED. |
| CN101858691A (en) * | 2010-06-07 | 2010-10-13 | 中国铝业股份有限公司 | Circulating fluidized bed boiler hot state boiler starting method |
-
2015
- 2015-03-03 CN CN201510093760.6A patent/CN104728835A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2002330C2 (en) * | 2008-12-15 | 2010-06-16 | Essent En Produktie B V | GASIFICATION OF SOLID FUELS IN A CIRCULATING SPIRAL BED. |
| CN101858691A (en) * | 2010-06-07 | 2010-10-13 | 中国铝业股份有限公司 | Circulating fluidized bed boiler hot state boiler starting method |
Non-Patent Citations (2)
| Title |
|---|
| 孙献斌等: "《大型循环流化床锅炉技术与工程应用 》", 31 December 2013 * |
| 胡昌华: "《600MW超临界循环流化床锅炉设备与运行 》", 31 December 2012 * |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150624 |
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| WD01 | Invention patent application deemed withdrawn after publication |