CN202074513U - Circulating fluidized-bed boiler for burning rice hulls - Google Patents
Circulating fluidized-bed boiler for burning rice hulls Download PDFInfo
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- CN202074513U CN202074513U CN2011201495450U CN201120149545U CN202074513U CN 202074513 U CN202074513 U CN 202074513U CN 2011201495450 U CN2011201495450 U CN 2011201495450U CN 201120149545 U CN201120149545 U CN 201120149545U CN 202074513 U CN202074513 U CN 202074513U
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- burner hearth
- outlet
- superheater
- hearth
- high temperature
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model provides a circulating fluidized-bed boiler for burning rice hulls, so that a separator is smooth in returning materials. A boiler barrel is installed above a hearth, and an overheater, a coal economizer, an air preheater and a boiler-outlet flue are sequentially installed in the smoke-gas flowing direction of the hearth. The circulating fluidized-bed boiler for burning the rice hulls is characterized in that: a double-spiral feeder and a rice-hull feeding pipe are connected to the outside of the lateral part at the bottom of the hearth, the double-spiral feeder and the rice-hull feeding pipe are communicated to a burning chamber at the inner part of the hearth, a rice-hull inlet of the rice-hull feeding pipe is provided with an air-inlet device blowing towards the hearth, a slag-discharging pipe is arranged at the lower part of the burning chamber, an under-bed ignition device is connected to the outside below the burning chamber, a wall-enclosing pipe is installed in a passage of the hearth connected with the overheater, a round steam-cooled high-temperature cyclone separator is vertically arranged in a space of the hearth communicated to the wall-enclosing pipe, the bottom of the round steam-cooled high-temperature cyclone separator is communicated with a material-returning passage, the material-returning passage is communicated with the burning chamber of the hearth, and a saturated-steam outlet pipe of the boiler barrel is connected with an upper-part pipeline inlet of the round steam-cooled high-temperature cyclone separator through a connecting pipe.
Description
Technical field
The utility model relates to the mechanical mechanism technical field of boiler, is specially a kind of CFBB of combusting rice hull.
Background technology
The development and use non-pollution of renewable energy has become world today's urgent problem.Wherein biomass energy has caused common people's attention with its recyclability, low contaminative.In biomass energy, it is abundant that rice husk has reserves, carry simple relatively, be easy to advantage such as preliminary treatment, but because rice husk density is little, inconvenience is stacked, therefore its transportation, storage, processing charges are higher relatively, and it utilizes radius to be generally 80 ~ 120km, and this has limited large power plant greatly to its effective utilization.Above drawback has been impelled the generation of the biomass fuel burning technology of small power plant.
Sulphur in the rice husk, nitrogen content are not high, and the combusting rice hull environmental pollution is little, the CO that it gives off in combustion process
2With absorb in its growth course about the same many, so rice husk burning is to air CO
2Clean discharging be zero.Make full use of the rice husk burning electricity generation, have energy savings, antipollution social benefit, also have good economic benefits.Thereby biomass burning (rice husk) generating is present most economical feasible reduction of discharging CO
2One of means.
Because in the rice husk fluidized bed combustion process, its unburned carbon in flue dust is apparently higher than the phosphorus content of ashes, the rice husk volatile matter is separated out rapidly, but coke is difficult to burn, problems such as the CFBB ubiquity separator coking of present domestic biological substance for combustion rice husk, returning charge are not smooth.
Summary of the invention
At the problems referred to above, the utility model provides a kind of CFBB of combusting rice hull, and it makes the separator noncoking, and returning charge is smooth and easy.
A kind of CFBB of combusting rice hull, its technical scheme is such: it comprises drum, burner hearth, superheater, economizer, air preheater, the boiler export flue, the top of described burner hearth is equipped with described drum, the flue gas flow direction direction of described burner hearth is equipped with described superheater successively, economizer, air preheater, the boiler export flue, it is characterized in that: the bottom sidepiece of described burner hearth is circumscribed with double-spiral feeder, to the rice husk pipe, described double-spiral feeder, the combustion chamber of leading to described burner hearth inside to the rice husk pipe, the described rice husk mouth that advances to the rice husk pipe is provided with towards the air-intake device of burner hearth blowing, described combustion chamber lower disposed has residue outlet, below, described combustion chamber is circumscribed with the ignition under bed device, the interchannel that described burner hearth connects described superheater is equipped with enclosure wall tube, described burner hearth leads in the space of described enclosure wall tube vertically to being furnished with the cold high temperature cyclone separator of circular vapour, the bottom of the cold high temperature cyclone separator of described circular vapour is communicated with the returning charge passage, the combustion chamber of the described burner hearth of described returning charge channel connection, the saturated vapor of described drum goes out pipe connects the cold high temperature cyclone separator of described circular vapour by tube connector upper pipeline import, the lower tube way outlet of the cold high temperature cyclone separator of described circular vapour connects the import of described enclosure wall tube by pipeline, the import of described superheater is led in the outlet of described enclosure wall tube, and the outlet of described superheater is communicated with described steam (vapor) outlet collection case.
It is further characterized in that: described superheater comprises low temperature superheater, high temperature superheater, described high temperature superheater, low temperature superheater are arranged in the flue gas flow direction direction of described burner hearth in turn, described low temperature superheater is led in the outlet of described enclosure wall tube, connect by direct-contact desuperheater between the outlet of described low temperature superheater and the import of described high temperature superheater, the outlet of described high temperature superheater is communicated with described steam (vapor) outlet collection case;
The boiler feed water import connects described economizer, the outlet of described economizer connects the water inlet of described drum by pipeline, the delivery port of described drum connects the water inlet of described burner hearth membrane wall by down-comer, and described burner hearth membrane wall top delivery port connects described drum by water inlet pipe;
Described combustion chamber arranged beneath has a wind apparatus up, and the top of described combustion chamber is furnished with overfire air device, tertiary air device, and described tertiary air device is arranged in the top of described overfire air device;
Described air preheater comprises inlet of cold air, middle part pipeline, air outlet, secondary air outlet, and a described air outlet is communicated with described wind apparatus successively, and described secondary air outlet is communicated with described overfire air device, tertiary air device respectively.
After adopting structure of the present utility model, rice husk is delivered to the combustion chamber of burner hearth inside by double-spiral feeder, produce high-temperature flue gas after the fuel combustion heat is passed to the membrane wall of burner hearth, the cold high temperature cyclone separator of round vapour, enclosure wall tube etc. successively, wherein produce high-temperature flue gas after the fuel combustion and produce separation at the cold high temperature cyclone separator of round vapour, more tiny particle enters the afterbody convection heating surface with flue gas, bigger particle is separated to get off, send into the combustion chamber district of burner hearth by the returning charge passage, form circulation, so it makes the separator noncoking, and returning charge is smooth and easy.
Description of drawings
Fig. 1 is a front view structural representation of the present utility model.
The specific embodiment
See Fig. 1, it comprises drum 1, burner hearth 2, superheater, economizer 9, air preheater, boiler export flue 19, superheater comprises low temperature superheater 8, high temperature superheater 7, high temperature superheater 7, low temperature superheater 8 is arranged in the flue gas flow direction direction of burner hearth 2 in turn, the top of burner hearth 2 is equipped with drum 1, the flue gas flow direction direction of burner hearth 2 is equipped with superheater successively, economizer 9, air preheater, boiler export flue 19, the bottom sidepiece of burner hearth 2 is circumscribed with double-spiral feeder 16, to rice husk pipe 17, double-spiral feeder 16, the combustion chamber 22 of leading to burner hearth 2 inside to rice husk pipe 17, the rice husk mouth that advances to rice husk pipe 17 is provided with towards the air-intake device 30 of burner hearth blowing, combustion chamber 22 lower disposed have residue outlet 18,22 belows, combustion chamber are circumscribed with ignition under bed device 12, the interchannel that burner hearth 2 connects superheater is equipped with enclosure wall tube 6, burner hearth 2 leads in the space of enclosure wall tube 6 vertically to being furnished with the cold high temperature cyclone separator 4 of circular vapour, the bottom of the cold high temperature cyclone separator 4 of circular vapour is communicated with returning charge passage 5, returning charge passage 5 is communicated with the combustion chamber 20 of burner hearth 2, the saturated vapor of drum 1 goes out pipe connects the cold high temperature cyclone separator 4 of circular vapour by tube connector 23 upper pipeline 24 imports, bottom pipeline 25 outlets of the cold high temperature cyclone separator 4 of circular vapour connect the import of enclosure wall tube 6 by pipeline 26, low temperature superheater 8 is led in the outlet of enclosure wall tube 6, connect by direct-contact desuperheater 21 between the import of the outlet of low temperature superheater 8 and high temperature superheater 7, the outlet of high temperature superheater 7 is communicated with steam (vapor) outlet collection case 20;
The boiler feed water import connects economizer 9, the outlet of economizer 9 (is not drawn among the figure by pipeline, belong to existing mature technology) connect the water inlet of drum 1, the delivery port of drum 1 is by the water inlet of down-comer 3 connection burner hearth membrane walls, and burner hearth membrane wall top delivery port connects drums 1 by water inlet pipe 27;
Air preheater comprises that inlet of cold air 28, middle part pipeline 29, air outlet 11,10, air outlets 11 of secondary air outlet are communicated with wind apparatus successively, and secondary air outlet 12 is communicated with overfire air device 14, tertiary air device 15 respectively.
Its operation principle is as follows:
Boiler feedwater enters economizer 9, be subjected to enter drum 1 after the flue gas heating, stove water in the drum 1 enters burner hearth 2 membrane walls respectively through down-comer 3, become steam water interface after stove water is heated by flue gas in burner hearth 2 membrane walls and enter drum 1, by water separator steam water interface is divided into saturated vapor and saturated stove water in drum 1, stove water enters down-comer; Saturated vapor is introduced the cold high temperature cyclone separator 4 of round vapour by tube connector, become superheated steam in cold high temperature cyclone separator 4 outlets of round vapour through the saturated vapor that heats and introduce superheater enclosure wall tube 6, low temperature superheater 8 by tube connector, enter the superheated steam that direct-contact desuperheater 21, high temperature superheater 7 reach the boiler nominal parameter then successively and introduce steam (vapor) outlet collection case 20 output boilers, enter steam turbine work done generating by tube connector.
Rice husk is carried the combustion chamber 22 of sending into burner hearth 2 bottoms from the stokehold to rice husk pipe 17 by wind-force, replenish the bed material and send into the additional ash content of burner hearth by screw(-type) feeder 16 from batcher, produce high-temperature flue gas after the fuel combustion heat is passed to the burner hearth membrane wall successively, the cold high temperature cyclone separator 4 of round vapour, high temperature superheater 7, low temperature superheater 8, economizer 9, air preheater 10, cooling back flue gas is discharged boiler by exhaust pass 19, through dedusting, the flue gas that meets national discharge index after the processing such as desulfurization is discharged by chimney, and the slag after the fuel combustion is discharged boiler by residue outlet 18.
Produce high-temperature flue gas after the fuel combustion and produce separation at the cold high temperature cyclone separator 4 of round vapour, more tiny particle enters the afterbody convection heating surface with flue gas, bigger particle is separated to get off, send into burner hearth 2 combustion chambers 22 by material-returning device 5, form circulation, in this process, red-hot particle is with heat transferred high temperature cyclone separator 4 and burner hearth membrane wall heating surface, ignition under bed device 12 uses light diesel fuel, uses when ignition of the boiler.
In order to organize fuel good burning in boiler, to reduce the generation of NOx, arranged wind apparatus 13, overfire air device 14 and tertiary air device 15 respectively one time, cold air enters into wind apparatus 13, overfire air device 14 and a tertiary air device 15 in air preheater heating back by air outlet 11, a secondary air outlet 10 and sends into burner hearth 2 respectively.
Claims (5)
1. the CFBB of a combusting rice hull, it comprises drum, burner hearth, superheater, economizer, air preheater, the boiler export flue, the top of described burner hearth is equipped with described drum, the flue gas flow direction direction of described burner hearth is equipped with described superheater successively, economizer, air preheater, the boiler export flue, it is characterized in that: the bottom sidepiece of described burner hearth is circumscribed with double-spiral feeder, to the rice husk pipe, described double-spiral feeder, the combustion chamber of leading to described burner hearth inside to the rice husk pipe, the described rice husk mouth that advances to the rice husk pipe is provided with towards the air-intake device of burner hearth blowing, described combustion chamber lower disposed has residue outlet, below, described combustion chamber is circumscribed with the ignition under bed device, the interchannel that described burner hearth connects described superheater is equipped with enclosure wall tube, described burner hearth leads in the space of described enclosure wall tube vertically to being furnished with the cold high temperature cyclone separator of circular vapour, the bottom of the cold high temperature cyclone separator of described circular vapour is communicated with the returning charge passage, the combustion chamber of the described burner hearth of described returning charge channel connection, the saturated vapor of described drum goes out pipe connects the cold high temperature cyclone separator of described circular vapour by tube connector upper pipeline import, the lower tube way outlet of the cold high temperature cyclone separator of described circular vapour connects the import of described enclosure wall tube by pipeline, the import of described superheater is led in the outlet of described enclosure wall tube, and the outlet of described superheater is communicated with described steam (vapor) outlet collection case.
2. the CFBB of a kind of combusting rice hull according to claim 1, it is characterized in that: described superheater comprises low temperature superheater, high temperature superheater, described high temperature superheater, low temperature superheater are arranged in the flue gas flow direction direction of described burner hearth in turn, described low temperature superheater is led in the outlet of described enclosure wall tube, connect by direct-contact desuperheater between the outlet of described low temperature superheater and the import of described high temperature superheater, the outlet of described high temperature superheater is communicated with described steam (vapor) outlet collection case.
3. the CFBB of a kind of combusting rice hull according to claim 2, it is characterized in that: the boiler feed water import connects described economizer, the outlet of described economizer connects the water inlet of described drum by pipeline, the delivery port of described drum connects the water inlet of described burner hearth membrane wall by down-comer, and described burner hearth membrane wall top delivery port connects described drum by water inlet pipe.
4. the CFBB of a kind of combusting rice hull according to claim 3, it is characterized in that: described combustion chamber arranged beneath has a wind apparatus up, the top of described combustion chamber is furnished with overfire air device, tertiary air device, and described tertiary air device is arranged in the top of described overfire air device.
5. the CFBB of a kind of combusting rice hull according to claim 4, it is characterized in that: described air preheater comprises inlet of cold air, middle part pipeline, air outlet, secondary air outlet, a described air outlet is communicated with described wind apparatus successively, and described secondary air outlet is communicated with described overfire air device, tertiary air device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201495450U CN202074513U (en) | 2011-05-12 | 2011-05-12 | Circulating fluidized-bed boiler for burning rice hulls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201495450U CN202074513U (en) | 2011-05-12 | 2011-05-12 | Circulating fluidized-bed boiler for burning rice hulls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202074513U true CN202074513U (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201495450U Expired - Lifetime CN202074513U (en) | 2011-05-12 | 2011-05-12 | Circulating fluidized-bed boiler for burning rice hulls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202074513U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252325A (en) * | 2011-05-12 | 2011-11-23 | 无锡华光锅炉股份有限公司 | Circulating fluidized bed boiler capable of burning rice husks |
| CN107345660A (en) * | 2017-08-16 | 2017-11-14 | 哈尔滨红光锅炉总厂有限责任公司 | Low emission type CFBB |
| CN115930208A (en) * | 2023-02-11 | 2023-04-07 | 泰山集团股份有限公司 | Purification process of circulating fluidized bed boiler |
-
2011
- 2011-05-12 CN CN2011201495450U patent/CN202074513U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252325A (en) * | 2011-05-12 | 2011-11-23 | 无锡华光锅炉股份有限公司 | Circulating fluidized bed boiler capable of burning rice husks |
| CN107345660A (en) * | 2017-08-16 | 2017-11-14 | 哈尔滨红光锅炉总厂有限责任公司 | Low emission type CFBB |
| CN107345660B (en) * | 2017-08-16 | 2023-06-06 | 哈尔滨红光锅炉总厂有限责任公司 | Low-emission circulating fluidized bed boiler |
| CN115930208A (en) * | 2023-02-11 | 2023-04-07 | 泰山集团股份有限公司 | Purification process of circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111214 Effective date of abandoning: 20130320 |
|
| RGAV | Abandon patent right to avoid regrant |