CN201335374Y - Water-cooling vortex internal separation circulating fluidized bed boiler - Google Patents
Water-cooling vortex internal separation circulating fluidized bed boiler Download PDFInfo
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- CN201335374Y CN201335374Y CNU2008202230987U CN200820223098U CN201335374Y CN 201335374 Y CN201335374 Y CN 201335374Y CN U2008202230987 U CNU2008202230987 U CN U2008202230987U CN 200820223098 U CN200820223098 U CN 200820223098U CN 201335374 Y CN201335374 Y CN 201335374Y
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- fluidized bed
- circulating fluidized
- bed boiler
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Abstract
The utility model discloses a water-cooling vortex internal separation circulating fluidized bed boiler, which comprises a hearth surrounded by furnace wall arch tubes, an air intake chamber and a convection tube bundle for communicating an upper boiler drum and a lower boiler drum. The water-cooling vortex internal separation circulating fluidized bed boiler is structurally characterized in that two sets of S-shaped supporting tubes are arranged inside the hearth to form a vortex internal separation chamber, and a secondary combustion chamber is formed between the hearth and the convection tube bundle and communicated with the vortex internal separation chamber via an internal circulation vortex type flue. The water-cooling vortex internal separation circulating fluidized bed boiler can effectively increase heating area, prolong flue gas flow path, and separate and return fume particles to the hearth for secondary combustion, thereby resulting in prominent effects in improving boiler thermal efficiency, reducing flow rate and circulation ratio, preventing clogging due to temperature excess and reducing emissions of fume and other pollutants. The flue gas emission can meet the first-class regional environmental standard stated by the state. The water-cooling vortex internal separation circulating fluidized bed boiler has good usage perspective.
Description
Technical field:
The utility model relates to fluidized-bed combustion boiler, specifically a kind of water-cooled vortex internal separation circulating fluidized bed boiler, it suits to use, and volatile matter hangs down and the big difficulty of flammable amount of slag is fired coal charge inferior, is particularly suitable for installing and using in the higher area of energy-conserving and environment-protective technical requirement.
Background technology:
We know: coal-fired steam boiler has simple in structure, the low remarkable advantage of production steam operating cost than oil burning boiler and gas fired-boiler.Just present, coal-fired steam boiler remains leading products of China's boiler industry.Coal-burned industrial boiler is as China's important heat power-equipment, and it also will have huge demand and development prospect in the boiler market of China.Understand according to market survey: particularly the Industrial Boiler of rated capacity≤65t/h, nominal steam pressure≤2.5Mpa is most widely used, its capacity has accounted for more than 60% of China's boiler total output, their major parts all need to use high-quality bituminous coal, but still exist undercapacity, efficiency of combustion is low and pollutant emission is serious defective.Though China is to be one of producing coal consumption coal big country of main energy sources in the world with coal,, in the categories of coal resource of China, belong to the brown coal of colm product, the output of coal of gangue class is occupied quite great proportion again.And currently be applicable to that the type of furnace of coal charges inferior such as using brown coal, gangue mainly is a fluidized-bed combustion boiler, wherein comparatively be typically a kind of a kind of external circulation fluidized bed boiler that has vertical cyclone separator generally popular in the world, that develop at the burning inferior coal material especially, its advantage is that the suitable digestion coal charge inferior that uses also can solve energy-conservation and the pollutant emission problem preferably.But, it still exists some technical bugs in actual use, it mainly shows as: the burner hearth of this equipment is tall and big, install and use that floor space is big, boiler integrated operation operational management comparatively difficulty and maintenance cost height, particularly also shows flow velocity in practical work process and circulating ratio is higher, the phenomenon of " overtemperature slagging scorification " takes place easily in separator and circulation feedback channel position.And slowing down the phenomenon of slagging scorification, the measure that will adopt high temperature cyclone separator can cause heat waste sharply to increase.The existing just external circulation fluidized bed boiler of above-mentioned technical bug presses for improved place, and this also is that the utility model is wanted the problem that solves.
The utility model content:
The purpose of this utility model is intended to overcome the existing weak point that has the external circulation fluidized bed boiler of vertical cyclone separator, and proposes a kind of water-cooled vortex internal separation circulating fluidized bed boiler, and it is to the further improvement of existing fluidized-bed combustion boiler and perfect.
The purpose of this utility model is achieved through the following technical solutions: it mainly comprises the burner hearth that is surrounded by the furnace wall arch tube, be installed on the inlet air plenum of burner hearth bottom and the convection bank of connection upper drum and lower drum, in burner hearth, be provided with the one group of water-cooled pipe laying that is communicated with next part case and middle collection case, it is characterized in that: in burner hearth, be provided with the S type stay pipe that collects case and upper collecting chamber in two groups of connections, on two groups of S type stay pipes, build and build separation chamber in the concrete membrane closure section formation vortex, be provided with secondary combustion chamber between burner hearth and convection bank, said secondary combustion chamber is connected with separation chamber in the vortex by interior circulation vortex type flue.During burning work: two groups of S type stay pipes make combustion product gases form " S " type in burner hearth and flow to, heating surface area, prolong smoke flow process both can have been increased, can stop effectively that again bigger flammable soot dust granule follows flue gas to rise, flammable soot dust granule is tackled be made it landing and be back to burner hearth bottom and continue after-flame; Be high-temperature flue gas that " S " type flow to rise and can quicken rotation behind the separation chamber form eddying motion in roof of the furnace enters vortex in burner hearth, the residual flammable soot dust granule that mixes in flue gas is will be under deadweight and centrifugal action separated and thorax bottom continuation after-flame is melted down in landing; Separate high-temperature flue gas behind the soot dust granule through above-mentioned two steps and enter by interior circulation vortex type flue that second-time burning is indoor to burn away and carry out heat exchange with the convection bank that is communicated in upper drum and lower drum.In sum, " the S type stay pipe " of the utility model initiative, " separation chamber in the vortex " and design features such as " being communicated with secondary combustion chamber " by interior circulation vortex type flue, be to link up mutually to cooperate to accomplish without any letup, this all has the effect of highly significant to improving boiler thermal output, reduce flow velocity and circulating ratio, prevent " overtemperature slagging scorification " and reducing smoke contamination thing discharge capacity, shows through on probation: it reaches 99% to separation rate in the stove of brown coal flue dust, can reduce the NO in the brown smoke of discharging greatly
X, SO
X, therefore, it suits to install in the higher area of energy-conserving and environment-protective technical requirement and use colms such as brown coal, gangue as boiler oil especially.
The utility model also has following technical characterictic:
Device has the wind-distributing pipe plate in the burner hearth bottom, can make burner hearth air intake cloth wind even, and it has positive effect to improving the burning quality of coal charge inferior in burner hearth especially.
Sidewall at burner hearth is fitted with secondary wind inleting tube, can impel the flue gas speed and direction changing under the effect of secondary air, coal charge inferior is fully burned and obviously improves smoke medicining dust-removing effect.
Be provided with the automatic control grey valve plate that falls in the following end tube section position of S type stay pipe, can will in vortex, separate the flammable soot dust granule foldback that is gathered automatically in the separation chamber and melt down the thorax bottom and make it to continue after-flame by the automatic control grey valve plate that falls.
Sidewall at secondary combustion chamber is fitted with loosening blast pipe, improves the indoor burning quality of second-time burning by the loosening wind energy that loosening blast pipe is sent into, and the discharge capacity that improves heat utilization efficiency and further reduction smoke contamination thing is had certain effect.
The interior circulation vortex type flue that is communicated with separation chamber in secondary combustion chamber and the vortex is to fill out concrete by one group of water-cooled around pipe to build block and constitute, said " water-cooled is filled out concrete around pipe and built block " is to be that the light-duty concrete of skeleton filling parcel Wear-resistant, high-temperature resistant is built to build and formed with one group of water-cooled around pipe, can have positive effect to preventing " overtemperature slagging scorification phenomenon " by the medium heat absorption local cooling of water-cooled in pipe.
The furnace wall arch tube that surrounds burner hearth is that one group of water screen tube is filled out concrete and built and build to constitute, said " water screen tube is filled out concrete and built block " is to be that the light-duty concrete of skeleton filling parcel Wear-resistant, high-temperature resistant is built to build and formed with one group of water screen tube, to improving the boiler hot utilization rate, reduce exterior wall body temperature degree, reducing outer surface of wall radiation heat loss and have certain effect.。
The utility model is compared with prior art has following advantage:
1. " S type stay pipe is set in the burner hearth " structure that the utility model proposes, making flue gas form " S " type in burner hearth flows to, can increase heating surface area, prolong smoke flow process, and can effectively flammable soot dust granule be tackled and make it to fall to returning to burner hearth bottom after-flame once more, this all has remarkable result to reducing flow velocity with circulating ratio, reduction smoke contamination thing discharge capacity.
2. " vortex in separation chamber " that the utility model proposes and " automatic control fall grey valve plate " structure, high-temperature flue gas is rotated in the separation chamber in vortex to be formed eddying motion and separates soot dust granule, automatically the soot dust granule foldback that gathers is melted down thorax bottom and made it to continue after-flame by the automatic control grey valve plate that falls, this discharge capacity to further reduction smoke contamination thing has remarkable result.
3. " the interior circulation vortex type flue " structure that the utility model proposes can absorb heat around pipe by water-cooled and carry out local cooling, has positive effect to preventing " overtemperature slagging scorification phenomenon ".
4. the utility model is novel, reasonable in design, the production run cost is low, and its suitable especially use colm is made fuel, reduces the production of steam cost greatly, and effects of energy saving and emission reduction is obvious.
Description of drawings:
Fig. 1 is the B-B view of Fig. 2, shows structural representation of the present utility model.
Fig. 2 is the A-A view of Fig. 1, shows the structural representation (amplification) of burner hearth.
The specific embodiment:
The water-cooled vortex internal separation circulating fluidized bed boiler that the utility model proposes is implemented by following technical scheme: it mainly comprises supporting steelframe 22, outer body of wall 21, economizer 20, the burner hearth 13 that surrounds by furnace wall arch tube 27, be installed on the inlet air plenum 2 of burner hearth 13 bottoms, the convection bank 19 of wind-distributing pipe plate 1 and connection upper drum 17 and lower drum 23, sidewall at burner hearth 13 is fitted with secondary wind inleting tube 5, coal filling hole 7 and service hatch 30, in burner hearth 13, be provided with the one group of water-cooled pipe laying 4 that is communicated with next part case 3 and middle collection case 6, said next part case 3 is to be connected by tube connector 24 with lower drum 23, in burner hearth 13, be provided with the S type stay pipe 9 that collects case 6 and upper collecting chamber 11 in two groups of connections, 12, upper drum 17 tops are fitted with live steam pipe control valve 18, at two groups of S type stay pipes 9, build on 12 and build concrete membrane closure section 31,29 form separation chamber 28 in the vortex, said " build and build concrete membrane closure section " is with two groups of S type stay pipes 9,12 build for the light-duty concrete of skeleton filling Wear-resistant, high-temperature resistant and to be built into sealing concrete film, be provided with the automatic control grey valve plate 33 that falls in following end tube section 32 positions of S type stay pipe 12, between burner hearth 13 and convection bank 19, be provided with secondary combustion chamber 16, sidewall at secondary combustion chamber 16 is fitted with loosening blast pipe 25, said secondary combustion chamber 16 is to be connected with separation chamber 28 in the vortex by interior circulation vortex type flue 15, and interior circulation vortex type flue 15 is to fill out concrete by one group of water-cooled around pipe 26 to build to build and constitute.It is work like this: when lighting a fire in burner hearth 13, the automatic control grey valve plate 33 that falls is in closed condition, start and to be connected in the blower fan of inlet air plenum 2 and through wind-distributing pipe plate 1 even distributing wind in burner hearth 13, the coal charge of being sent into by coal filling hole 7 inferior burns at the inner bottom part of burner hearth 13, at this moment be arranged at two groups of S type stay pipes 9 in the burner hearth 13,12 make the combustion high temperature flue gas form " S " type in burner hearth 13 flows to, the high-temperature flue gas that rises is as shown in arrow 10 to pass slit 8 between the pipe of S type stay pipe 9, slit 14 enters separation chamber 28 in the vortex through between the pipe of burner hearth 13 top S type stay pipes 12, at this moment follow bigger flammable soot dust granule that flue gas rises effectively to tackle and make it to land that completing combustion is clean once more in the bottom that is back to burner hearth 13 by S type stay pipe 9 bodys, and the high-temperature flue gas that enters in the separation chamber in the vortex 28 is as shown in arrow 10, will in vortex, quicken rotation in the separation chamber 28 and form eddying motion, can make the residual less soot dust granule that mixes in flue gas separated under deadweight and centrifugal action, the soot dust granule that is separated accumulates in sedimentation at the following end tube section 32 bottom position places of S type stay pipe 12, when the soot dust granule sedimentation is gathered to a certain degree the time, the automatic control grey valve plate 33 that falls can be opened the bottom that its foldback is melted down thorax 13 automatically to make it completing combustion clean, and this is to reducing flow velocity and circulating ratio, reduce smoke contamination thing discharge capacity significant effect is all arranged.The flue gas that has separated behind the soot dust granule will enter secondary combustion chamber 16 and burn away under the loosening wind effect of being sent into by loosening blast pipe 25 by interior circulation vortex type flue 15, the heat that is discharged will carry out heat exchange with convection bank 19, add steam that hot water generates and will enter upper drum 17 and can use for output.Last remaining flue gas gets final product safety dumping again behind economizer 20 further absorbing and cooling temperatures.Detection shows through practical probation: boiler thermal output can reach more than 85%, the temperature of the remaining flue gas that discharges is below 170 ℃, reduces the NO in the brown smoke significantly
X, SO
X, separation rate reaches 99% in the brown coal flue dust stove, and flue gas pollutant discharging overall target reaches the class area discharge standard of national regulation fully.
Claims (7)
1. water-cooled vortex internal separation circulating fluidized bed boiler, it mainly comprises the burner hearth (13) that is surrounded by furnace wall arch tube (27), be installed on the inlet air plenum (2) of burner hearth (13) bottom and the convection bank (19) of connection upper drum (17) and lower drum (23), in burner hearth (13), be provided with the one group of water-cooled pipe laying (4) that is communicated with next part case (3) and middle collection case (6), it is characterized in that: in burner hearth (13), be provided with the S type stay pipe (9 that collects case (6) and upper collecting chamber (11) in two groups of connections, 12), at two groups of S type stay pipes (9,12) build on and build concrete membrane closure section (31,29) form separation chamber (28) in the vortex, be provided with secondary combustion chamber (16) between burner hearth (13) and convection bank (19), said secondary combustion chamber (16) is connected with separation chamber (28) in the vortex by interior circulation vortex type flue (15).
2. water-cooled vortex internal separation circulating fluidized bed boiler according to claim 1 is characterized in that: the bottom device has wind-distributing pipe plate (1) in burner hearth (13).
3. water-cooled vortex internal separation circulating fluidized bed boiler according to claim 1 and 2 is characterized in that: the sidewall at burner hearth (13) is fitted with secondary wind inleting tube (5).
4. water-cooled vortex internal separation circulating fluidized bed boiler according to claim 1 is characterized in that: be provided with the automatic control grey valve plate (33) that falls in following end tube section (32) position of S type stay pipe (12).
5. water-cooled vortex internal separation circulating fluidized bed boiler according to claim 1 is characterized in that: the sidewall at secondary combustion chamber (16) is fitted with loosening blast pipe (25).
6. water-cooled vortex internal separation circulating fluidized bed boiler according to claim 1 is characterized in that: connection secondary combustion chamber (16) is to fill out concrete by one group of water-cooled around pipe (26) to build the block formation with the interior circulation vortex type flue (15) of the interior separation chamber (28) of vortex.
7. water-cooled vortex internal separation circulating fluidized bed boiler according to claim 1 is characterized in that: the furnace wall arch tube (27) that surrounds burner hearth (13) is that one group of water screen tube is filled out concrete and built and build to constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202230987U CN201335374Y (en) | 2008-12-03 | 2008-12-03 | Water-cooling vortex internal separation circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202230987U CN201335374Y (en) | 2008-12-03 | 2008-12-03 | Water-cooling vortex internal separation circulating fluidized bed boiler |
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| Publication Number | Publication Date |
|---|---|
| CN201335374Y true CN201335374Y (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202230987U Expired - Fee Related CN201335374Y (en) | 2008-12-03 | 2008-12-03 | Water-cooling vortex internal separation circulating fluidized bed boiler |
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| Country | Link |
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| CN (1) | CN201335374Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213413A (en) * | 2011-07-04 | 2011-10-12 | 缪建通 | Coal-saving high-temperature boiling furnace |
-
2008
- 2008-12-03 CN CNU2008202230987U patent/CN201335374Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213413A (en) * | 2011-07-04 | 2011-10-12 | 缪建通 | Coal-saving high-temperature boiling furnace |
| CN102213413B (en) * | 2011-07-04 | 2012-09-05 | 缪建通 | Coal-saving high-temperature boiling furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Sichuan Hebang Co., Ltd. Assignor: Pan Zhiming Contract record no.: 2011510000278 Denomination of utility model: Vertical water-cooled vortex inner separation circulating fluidized bed boiler Granted publication date: 20091028 License type: Exclusive License Record date: 20110916 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20171203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |