CN107795985A - A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash - Google Patents
A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash Download PDFInfo
- Publication number
- CN107795985A CN107795985A CN201711078764.2A CN201711078764A CN107795985A CN 107795985 A CN107795985 A CN 107795985A CN 201711078764 A CN201711078764 A CN 201711078764A CN 107795985 A CN107795985 A CN 107795985A
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- CN
- China
- Prior art keywords
- pipe
- ash
- cooling
- water
- cooling water
- 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
-
- 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
- F23C10/24—Devices for removal of material from the bed
- F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
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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
- F23C10/32—Control devices specially adapted for fluidised bed, combustion apparatus for controlling the level of the bed or the amount of material in the bed by controlling the rate of recirculation of particles separated from the flue gases
-
- 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
- F23C2206/102—Control of recirculation rate
-
- 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
- F23C2206/103—Cooling recirculating particles
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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 present invention is after the completion of ash under material returning device,Start cold ash,Dust leg is a water-cooling jacket pipe,The cooling water pipe of a connection cooling water main pipe is provided between the ectonexine of water-cooling jacket pipe,Cooling water enters cooling water pipe by main pipe from the bottom of water-cooling jacket pipe,Then enter the dashpot for placing material returning device by cooling water pipe,In dust leg insertion dashpot,Material returning device expanded by heating is prevented to be obstructed,Ash is put by returning charge,Boiler thermal output can be improved,Reduce burner hearth bed drain purge,The not coal-fired probability directly released from scum pipe of bulky grain can be reduced,Ensure safe and economical boiler operation,What installation device for cooling ash can improve bed temperature heightens boiler efficiency,Improve the artificial safety coefficient for putting ash,Pass through device for cooling ash adjustment of rotational speed,Control burner hearth differential pressure 1400pa,Stabilize bed temperature,Reduce artificial 4 people,With everyone monthly 5000 yuan,Monthly reduce by 20,000 yuan of cost of labor,Live dust secondary pollution is prevented,Improve boiler operating efficiency.
Description
Technical field
The present invention relates to a kind of boiler technology, more particularly to a kind of fluidized-bed combustion boiler returning charge, the technique of putting ash.
Background technology
To adapt to national environmental protection policy requirements, the CFBB of latest generation has arranged point for efficiently separating efficiency
From device, the separator after improvement is compared with former separator, and separative efficiency is not in a level, and for guarantee, a new generation is circulated
Fluidized-bed combustion boiler can reach environmental protection, energy-conservation, it is efficient on the basis of, without lost system recirculating fluidized bed coal adaptability is strong, load
The strong characteristic of regulating power, practice is added to prove repeatedly through I am theoretical, boiler of new generation will put ash and burner hearth slagging using material returning device
The method of operation being combined, and fluidized-bed combustion boiler burning is a kind of complicated low-temperature burning technology, burner hearth differential pressure controls in operation
Very crucial, the high bed temperature of differential pressure declines, and efficiency of combustion declines, and differential pressure sunken bed temperature is high, easy coking and boiler on-load difficulty, typically
The effect of the returning charge leg dust leg of boiler design：1）Red ash is directly put during boiler exception；2）The cleaning of returning charge leg is put after boiler shutdown
Ash, if burner hearth differential pressure is high in operation, can only be solved by strengthening hearth deslagging, this burner hearth slagging, which exists, not to be burnt largely
Coal discharge causes energy waste, and also fine ash takes that ratio is extremely low, and the suitable bed of boiler is reduced causes boiler coke out of, general artificial
Putting ash at least needs four people, and temperature is high, dust is big due to putting during ash, and work murther, it is easy to scalds.
The content of the invention
The present invention is intended to provide a kind of fluidized-bed combustion boiler returning charge, the technique for putting ash.
To realize above-mentioned technical purpose, the present invention uses following technical scheme, a kind of fluidized-bed combustion boiler returning charge, the work for putting ash
Skill, comprise the following steps：
S1, material returning device receive returning charge ash caused by combustion chamber；
Ash to dust leg, material returning device enters the resistant to elevated temperatures slide valves of reconfiguration DN50 at device for cooling ash under S2, material returning device, and dust leg is adopted
With water-cooling jacket pipe, dust leg connection slag cooler；
Under S3, material returning device after the completion of ash, start cold ash, dust leg is a water-cooling jacket pipe, the ectonexine of water-cooling jacket pipe it
Between be provided with the cooling water pipe of a connection cooling water main pipe, cooling water enters cooling water by main pipe from the bottom of water-cooling jacket pipe
Pipe, such one is that can reduce dust leg road wall temperature to reach safer purpose, and swell increment is also smaller, second, can also reduce ash discharge temperature
Degree, the dashpot for placing material returning device is then entered by cooling water pipe, dust leg is inserted in dashpot, and it is swollen to prevent that material returning device is heated
Swollen to be obstructed, a length of 8 meters of dashpot, dashpot inside is provided with water cooling coil pipe, and coil pipe uses 20G/GB5310 type boiler tubes, coil pipe
A diameter of 20mm, wall thickness 5mm；
Temperature rises after water cooling coil pipe inside the buffered groove of S4, cooling water, and cooling water is collected to DN133 galvanized pipes and is sent into deoxygenation
Device turns into deaerated water and is sent into cooling water main pipe, and cooling water main pipe connects the pipeline of slag cooler；
S5, cold ash are completed, and dust leg is incorporated to slag cooler entrance and excludes bulky grain by slag cooler, and fine ash is inhaled by slag cooler sweep-up pipe
Enter sack cleaner entrance.
Preferably, camber≤120 degree of the dust leg.
Preferably, the cooling water in step S3 is using demineralized water.
Preferably, a DN80 galvanized pipe is installed in main pipe and the junction of slag cooler pipeline.
The present invention is based on the basis of more high separating efficiency separator, and grey particle diameter is smaller in the boiler combustion circulatory system, and
Wherein more little particle proportion is higher, considers environmental protection, energy-conservation and the thermal efficiency, boiler is under 100%BMCR operating modes, bed
Temperature is designed at 890 ~ 900 DEG C (temporarily considering by bituminous coal), and now burner hearth differential pressure about 2000pa, in underload, should pass through material returning device
Putting the mode that grey and burner hearth slagging is combined reduces burner hearth differential pressure, and control bed temperature is unlikely too low, generally, 50%BMCR works
Under condition, burner hearth differential pressure should be controlled in below 1000pa, 70%BMCR, and burner hearth differential pressure should be controlled in below 1400pa.Compartment pressure
6000~7500pa.The boiler ash of the present invention is than 6:4, because the phosphorus content of returning charge ash is relatively low, less than 2%, ash is put by returning charge, can
Boiler thermal output is improved, reduces burner hearth bed drain purge, the not coal-fired probability directly released from scum pipe of bulky grain can be reduced, ensured
Safe and economical boiler is run, and installation device for cooling ash can improve the boiler efficiency of heightening of bed temperature, improves the artificial safety coefficient for putting ash,
By device for cooling ash adjustment of rotational speed, control burner hearth differential pressure 1400pa, stabilize bed temperature, reduce artificial 4 people, with everyone monthly 5000
Member, 20,000 yuan of cost of labor is monthly reduced, has prevented live dust secondary pollution, boiler operating efficiency has been improved, according to back balance
Calculate, radiation loss reduces by 0.5%, and carbon content in the bottom ash reduces by 1.2%, and boiler efficiency improves 0.4%.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, unless otherwise prescribed with limit, it is necessary to explanation, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanical connection or electrical connection or the connection of two element internals, can
To be to be joined directly together, can also be indirectly connected by intermediary.For the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
A kind of fluidized-bed combustion boiler returning charge according to embodiments of the present invention is described referring to Fig. 1, puts the technique of ash, including with
Lower step：
S1, material returning device receive returning charge ash caused by combustion chamber；
For ash to dust leg, material returning device enters the resistant to elevated temperatures slide valves of reconfiguration DN50 at device for cooling ash under S2, material returning device, and dust leg uses
Water-cooling jacket pipe, dust leg connection slag cooler；
Under S3, material returning device after the completion of ash, start cold ash, dust leg is a water-cooling jacket pipe, the ectonexine of water-cooling jacket pipe it
Between be provided with the cooling water pipe of a connection cooling water main pipe, cooling water enters cooling water by main pipe from the bottom of water-cooling jacket pipe
Pipe, such one is that can reduce dust leg road wall temperature to reach safer purpose, and swell increment is also smaller, second, can also reduce ash discharge temperature
Degree, the dashpot for placing material returning device is then entered by cooling water pipe, dust leg is inserted in dashpot, and it is swollen to prevent that material returning device is heated
Swollen to be obstructed, a length of 8 meters of dashpot, dashpot inside is provided with water cooling coil pipe, and coil pipe uses 20G/GB5310 type boiler tubes, coil pipe
A diameter of 20mm, wall thickness 5mm；
Temperature rises after water cooling coil pipe inside the buffered groove of S4, cooling water, and cooling water is collected to DN133 galvanized pipes and is sent into deoxygenation
Device turns into deaerated water and is sent into cooling water main pipe, and cooling water main pipe connects the pipeline of slag cooler；
S5, cold ash are completed, and dust leg is incorporated to slag cooler entrance and excludes bulky grain by slag cooler, and fine ash is inhaled by slag cooler sweep-up pipe
Enter sack cleaner entrance.
Preferably, camber≤120 degree of the dust leg.
Preferably, the cooling water in step S3 is using demineralized water.
Preferably, a DN80 galvanized pipe is installed in main pipe and the junction of slag cooler pipeline.
The present invention is based on the basis of more high separating efficiency separator, and grey particle diameter is smaller in the boiler combustion circulatory system, and
Wherein more little particle proportion is higher, considers environmental protection, energy-conservation and the thermal efficiency, boiler is under 100%BMCR operating modes, bed
Temperature is designed at 890 ~ 900 DEG C (temporarily considering by bituminous coal), and now burner hearth differential pressure about 2000pa, in underload, should pass through material returning device
Putting the mode that grey and burner hearth slagging is combined reduces burner hearth differential pressure, and control bed temperature is unlikely too low, generally, 50%BMCR works
Under condition, burner hearth differential pressure should be controlled in below 1000pa, 70%BMCR, and burner hearth differential pressure should be controlled in below 1400pa.Compartment pressure
6000~7500pa.The boiler ash of the present invention is than 6:4, because the phosphorus content of returning charge ash is relatively low, less than 2%, ash is put by returning charge, can
Boiler thermal output is improved, reduces burner hearth bed drain purge, the not coal-fired probability directly released from scum pipe of bulky grain can be reduced, ensured
Safe and economical boiler is run, and installation device for cooling ash can improve the boiler efficiency of heightening of bed temperature, improves the artificial safety coefficient for putting ash,
By device for cooling ash adjustment of rotational speed, control burner hearth differential pressure 1400pa, stabilize bed temperature, reduce artificial 4 people, with everyone monthly 5000
Member, 20,000 yuan of cost of labor is monthly reduced, has prevented live dust secondary pollution, boiler operating efficiency has been improved, according to back balance
Calculate, radiation loss reduces by 0.5%, and carbon content in the bottom ash reduces by 1.2%, and boiler efficiency improves 0.4%.
In the description of this specification, the description meaning of reference term " one embodiment ", " example " or " some examples " etc.
Refer at least one reality that the present invention is contained in reference to specific features, structure, material or the feature that the embodiment or example describe
Apply in example or example.In this manual, identical embodiment is not necessarily referring to the schematic representation of above-mentioned term or shown
Example.Moreover, specific features, structure, material or the feature of description can be in any one or more embodiments or example
Combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (4)
1. a kind of fluidized-bed combustion boiler returning charge, the technique for putting ash, it is characterised in that comprise the following steps：
S1, material returning device receive returning charge ash caused by combustion chamber；
For ash to dust leg, material returning device enters the resistant to elevated temperatures slide valves of reconfiguration DN50 at device for cooling ash under S2, material returning device, and dust leg uses
Water-cooling jacket pipe, dust leg connection slag cooler；
Under S3, material returning device after the completion of ash, start cold ash, dust leg is a water-cooling jacket pipe, the ectonexine of water-cooling jacket pipe it
Between be provided with the cooling water pipe of a connection cooling water main pipe, cooling water enters cooling water by main pipe from the bottom of water-cooling jacket pipe
Pipe, the dashpot for placing material returning device is then entered by cooling water pipe, dust leg is inserted in dashpot, and it is swollen to prevent that material returning device is heated
Swollen to be obstructed, a length of 8 meters of dashpot, dashpot inside is provided with water cooling coil pipe, and coil pipe uses 20G/GB5310 type boiler tubes, coil pipe
A diameter of 20mm, wall thickness 5mm；
Temperature rises after water cooling coil pipe inside the buffered groove of S4, cooling water, and cooling water is collected to DN133 galvanized pipes and is sent into deoxygenation
Device turns into deaerated water and is sent into cooling water main pipe, and cooling water main pipe connects the pipeline of slag cooler；
S5, cold ash are completed, and dust leg is incorporated to slag cooler entrance and excludes bulky grain by slag cooler, and fine ash is inhaled by slag cooler sweep-up pipe
Enter sack cleaner entrance.
2. technique according to claim 1, it is characterised in that camber≤120 degree of the dust leg.
3. technique according to claim 1, it is characterised in that the cooling water in step S3 is using demineralized water.
4. technique according to claim 1 a, it is characterised in that DN80 is installed in main pipe and the junction of slag cooler pipeline
Galvanized pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078764.2A CN107795985B (en) | 2017-11-06 | 2017-11-06 | A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078764.2A CN107795985B (en) | 2017-11-06 | 2017-11-06 | A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107795985A true CN107795985A (en) | 2018-03-13 |
| CN107795985B CN107795985B (en) | 2019-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711078764.2A Expired - Fee Related CN107795985B (en) | 2017-11-06 | 2017-11-06 | A kind of fluidized-bed combustion boiler returning charge, the technique for putting ash |
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| Country | Link |
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| CN (1) | CN107795985B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736097A (en) * | 2019-11-14 | 2020-01-31 | 无锡华光锅炉股份有限公司 | arrangement structure for adjusting circulating material quantity and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924438A (en) * | 2006-09-15 | 2007-03-07 | 西安热工研究院有限公司 | Self-declining type circulating ash cooling device and treatment method for circulating ash |
| CN101929672A (en) * | 2009-06-24 | 2010-12-29 | 中国科学院工程热物理研究所 | U-shaped water-cooling material returner |
| CN203036631U (en) * | 2012-11-29 | 2013-07-03 | 湘潭锅炉有限责任公司 | Cooling device of boiler revert system |
| CN104990071A (en) * | 2015-05-22 | 2015-10-21 | 四川省宜宾惠美线业有限责任公司 | Circulating fluidized bed boiler capable of adjusting circulating ash flow |
| CN107062210A (en) * | 2017-05-24 | 2017-08-18 | 中国华能集团清洁能源技术研究院有限公司 | A kind of Load of Circulating Fluidized Bed Boiler adjusting apparatus and method |
-
2017
- 2017-11-06 CN CN201711078764.2A patent/CN107795985B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924438A (en) * | 2006-09-15 | 2007-03-07 | 西安热工研究院有限公司 | Self-declining type circulating ash cooling device and treatment method for circulating ash |
| CN101929672A (en) * | 2009-06-24 | 2010-12-29 | 中国科学院工程热物理研究所 | U-shaped water-cooling material returner |
| CN203036631U (en) * | 2012-11-29 | 2013-07-03 | 湘潭锅炉有限责任公司 | Cooling device of boiler revert system |
| CN104990071A (en) * | 2015-05-22 | 2015-10-21 | 四川省宜宾惠美线业有限责任公司 | Circulating fluidized bed boiler capable of adjusting circulating ash flow |
| CN107062210A (en) * | 2017-05-24 | 2017-08-18 | 中国华能集团清洁能源技术研究院有限公司 | A kind of Load of Circulating Fluidized Bed Boiler adjusting apparatus and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736097A (en) * | 2019-11-14 | 2020-01-31 | 无锡华光锅炉股份有限公司 | arrangement structure for adjusting circulating material quantity and control method |
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| Publication number | Publication date |
|---|---|
| CN107795985B (en) | 2019-04-19 |
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Granted publication date: 20190419 Termination date: 20211106 |