CN2033470U - Step-rate, dowble bed, cycling fluidized-bed combustion boiler - Google Patents
Step-rate, dowble bed, cycling fluidized-bed combustion boiler Download PDFInfo
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- CN2033470U CN2033470U CN 88209420 CN88209420U CN2033470U CN 2033470 U CN2033470 U CN 2033470U CN 88209420 CN88209420 CN 88209420 CN 88209420 U CN88209420 U CN 88209420U CN 2033470 U CN2033470 U CN 2033470U
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- beans
- combustion
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 27
- 230000001351 cycling effect Effects 0.000 title 1
- 239000003245 coal Substances 0.000 claims abstract description 46
- 239000000428 dust Substances 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003546 flue gas Substances 0.000 claims abstract description 16
- 239000010881 fly ash Substances 0.000 claims abstract description 8
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 18
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 18
- 238000009835 boiling Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 239000002956 ash Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 abstract description 3
- 240000007594 Oryza sativa Species 0.000 abstract description 2
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 2
- 235000009566 rice Nutrition 0.000 abstract description 2
- 238000009839 combustion train Methods 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 230000003134 recirculating effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000000446 fuel Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 241000273930 Brevoortia tyrannus Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000015111 chews Nutrition 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses an industrial boiler with a novel combustion train. The boiler can conduct fractional combustion and fly ash backflash and gas recirculation to the combustibles. The device comprises a bulk of the step-rate double bed fluidized-bed boiler, an ash separator, a tail heating surface, a fly ash recovery device and a flue gas recirculating system, etc. The utility model is suitable to various combustibles, and the efficiency of the burning of the medium coal can reach 97%, and the inceptive drawing-off dust density is lower than 2 grams / mark rice +[3]. The utility model has the advantages of reliable operation, easy regulation, high ratio of the load adjustment and preventing the clogging of the air heater, and the metal materials are sparer than the bicycle chain furnaces. This device is suitable to the reconstruction of the 6-20t/h industrial boilers and the available industrial boilers.
Description
The utility model belongs to a kind of combustion of industrial boiler device that utilizes fluidized bed combustion principle design, and it is specially adapted to evaporation capacity is 6～20 tons/hour Industrial Boiler.
Industrial Boiler is widely used in national economy all departments, have a large capacity and a wide range, energy consumption up to national raw coal output 1/3rd a little less than, the grate firing type boiler of producing requires high to the bad adaptability of fuel, the lumpiness of coal at present, though design can reach 76～80% with evaluation efficient, but because coal changes greatly, fine powder content is high, and efficient is but very low during actual motion.With nearly 20,000 6 tons in China/time more than Industrial Boiler statistics, evenly heat efficient has only 65%.China begins to use fluidized bed combustion boiler the sixties, be mainly the combustion problem that solves colm, though the available various atures of coal of fluidized bed furnace are made fuel, but the pipe laying area is once determining, coal adaptability also will be subjected to certain limitation, and the adjusting function of boiler is poor, is difficult to adapt to the requirement of the frequent change of Industrial Boiler load, even has to adopt passive ways such as emptying, steam bleeding to keep fluidized bed furnace smooth combustion.In addition, the wearing and tearing of pipe laying will influence boiler operation reliably continuously, and the flying dust amount makes fluidized bed furnace use the restriction that is subjected to Law on Environmental Protection greatly again in the city.Many drawbacks make fluidized bed furnace almost become synonym dirty, dirty, the poor efficiency boiler.Carried out number of research projects at these disadvantages of fluidized bed furnace both at home and abroad in recent years, for example external second generation fluidized bed furnace--the circulating fluidized bed boiler of succeeding in developing in recent years, though it is strong that it has the adaptability of fuel, efficiency of combustion is up to 98～99%, load adjustment ability is good, also do not have advantages such as buried pipe abrasion problem, and have many station boilers to put into operation.But this boiler structure is complicated, the blast of primary air fan is up to 40000 handkerchiefs, and power consumption is big, the initial smoke density height of boiler, needs the adapted high-efficiency dust remover, therefore this type of furnace is mainly used in the station boiler of large and medium-sized capacity, and is difficult to be used for the general industry boiler.China Zhejiang University then with use the sedimentation flying dust, the raising thermal efficiency is purpose, repacks the SHF10-13 type double bed fluidized bed furnace of flying dust bed in Huzhou chemical fertilizer factory, this boiler master bed burning diameter is the coal grain of 0～8mm; And the area of secondary bed only is used for the sedimentation flying dust of burning boiler less than main bed, though utilize this method that the thermal efficiency of boiler has been improved 10%, the basic defect of fluidized bed furnace is not still solved at all.
The objective of the invention is to propose that meter is a kind of has comparatively desirable combustion of industrial boiler devices such as master's (beans) of fractional combustion, secondary (fine coal) bed and fly-ash reburning, flue gas recirculation device, with as 6～20 tons/time boiler a kind of general combustion apparatus.This equipment is based on matter coal in using, and its efficiency of combustion can reach 97%, and the while is burning anthracite and low-grade coal also, and makes its conversion coal easily that is in operation; The flying dust share of boiler is less than 5%, promptly only be chain furnace 1/3rd (for fluidized bed furnace commonly used 1/10th), through in can reach discharge standard after imitating the deduster dedusting, boiler is in operation regulates flexibly, heating surface area is with suitable with the chain furnace of capacity, and total metal consumption is lower than the fluidized bed combustion boiler of chain furnace, to reach purposes such as overcoming the existing drawback of the above-mentioned type of furnace.
The utility model be by the circulation of the Boiling Combustion in the boiler technology, flying dust strile-back, the comprehensive utilization of technology such as gasification, and combustion and flue gas recirculation are strile-backd is used for realizing.Its solution is to adopt two coal beds in boiler---beans bed (main bed) and fine coal bed (secondary bed).Raw coal divides the beans of 70% 1～6 mm dia hanked and the fine coal of 30% 0～2 mm dia in proportion after fragmentation, and deliver to Boiling Combustion in beans bed and the fine coal bed respectively by different coal bunkers and coal conveyor, the flying dust of boiling bed elutriation burns away through the high temperature secondary furnace, fuel gas in the flue gas can burn fully, flying dust can only partial combustion, the secondary separation in flue and external separator of flying dust in the flue gas, wherein most of flying dust is separated and send in the fine coal bed burning again.Because fine powder is few in the beans bed, and the boiling wind speed is low in the fine coal bed, therefore the flying dust amount is few in combustion process, and burn in the fine coal bed back major part of the flying dust that separator separates is that form with the bed material is discharged from, and this has just solved the defective that separator in the fly-ash reburning system can not purify flue gas; Chews bed of the present invention is not established the pipe laying heating surface, from and the wearing and tearing that solved because of pipe laying cause the insecure problem of operation; Fluidized layer temperature is to control an internal combustion share by regulating the combustion air amount, regulate the flue gas recycled amount and control with the method that absorbs unnecessary heat with the wind speed that keeps seething with excitement normally, and ratio and the flue gas recycled amount of regulating primary and secondary air transfer, control the bed temperature variation that causes owing to load variations or the change of fuel.The fine coal bed is still arranged pipe laying among the present invention, because fine coal bed boiling wind speed is low, can not become problem according to its wearing and tearing of operating experience of flying dust bed, and bed temperature is then regulated by flue gas recycled.Thereby the present invention reaches cleaning, efficient by such scheme, and is reliable, easy to adjust and adapt to the purpose of many coals.
Accompanying drawing one is the utility model structural representation, it is by coal-storing hopper 1,2, feeder 3,4, compositions such as beans bed 5, fine coal bed 6, fine coal bed pipe laying 16, secondary furnace 7, cooling chamber 8, convection bank 9, fly ash separator 10, economizer 11, air preheater 12, pressure fan 13,15, air-introduced machine 14, flying dust circulating line A, flying dust conveyer 17, flue gas recycled pipeline B and deduster.Beans input furnace bin 1, fine coal input coal bunker 2 after broken, screening, feeder 3 is sent beans into Boiling Combustions in the beans bed 5, and blower fan 15 is sent wind and flue gas recycled into beans bed 5; Feeder 4 is sent fine coal into fine coal bed 6, the air that blower fan 13 is required with the burning of fine coal bed and the secondary wind and the part flue gas recycled of beans bed, after air preheater 12 heating, deliver to fine coal bed 6, the heat that burning is produced is taken away by pipe laying heating surface 16 and flue gas, the area of beans bed is less than the fine coal bed, and it is fixed that its ratio is looked concrete condition; The boiling bed gas fume after burning is through secondary furnace 7, and the back that burns away is to cooling chamber 8, convection bank 9, to fly ash separator 10, and sedimentation and flying dust separator isolated 88% are sent the burning of fine coal bed back to once more through pipeline A and flying dust conveyer 17 in the flue; Flue gas is then through economizer 11, air preheater 12, discharged after dedusting by air-introduced machine 14.
This is suitable for, and novel to have a fuel tolerance strong, efficient height (efficiency of combustion of II class bituminous coal is 97%), and (flying dust share＜5%, the boiler initial dust-density emission is low, promptly＜2 gram/mark meter for cleaning
3), environmental pollution is little, no buried pipe abrasion problem, characteristics such as adjusting function is good, load regulation rate is big, and power consumption and steel consumption is moderate, be specially adapted to 6～20 tons/time Industrial Boiler.
Embodiment
Using II class bituminous coal, evaporation capacity be 20 tons/time boiler be example:
Boiler appearance and size (length * wide * height):
（8135＋2540）×5300×16000mm
Beans bed air distribution plate area: 4.8m
2
Fine coal bed air distribution plate area: 8.4m
2
The model and the parameter of beans bed blower fan 15 are: 5-36-11
8
#Thousand watt of (t=140 ℃) N=55
The model and the parameter of fine coal bed blower fan 13 are: 9-19
14
#(n=960) N=37 is thousand watt
The model of air-introduced machine 14 and parameter are: Y4-68
11.2
#Thousand watt of N=75
It is as follows with summary sheet that its heating power calculates summary:
1, evaporation capacity: 20 tons/time
2, pressure: 2.5 MPas
3, temperature: saturation temperature
4, exhaust gas temperature: 180 ℃
5, beans bed lime-ash can burn thing content: 2.5%
6, fine powder bed ash combustibles content: 0.2%
7, unburned combustible in fly ash: 22.2%
8, flying dust share: 0.043
9, boiler initial dust-density emission: 1900 millimeters/mark rice
3
10, boiler efficiency: 85%
11, efficiency of combustion: 97% 12, fuel consumption: 3073 kilograms/time
Content symbolic unit Boiling Combustion cooling convection current cast iron air
The economizer of chamber tube bank layer by layer preheater
Heating surface area H m
28.2+ 21.4 47.3 327 314 188
13.5
Import cigarette temperature Q ℃ 1,000 978 776 330 220
Outlet cigarette temperature Q " ℃ 1,000 978 776 330 220 180
Medium inlet temperature t ℃ 225 225 225 225 104 65
Media outlet temperature t " ℃ 225 225 225 225 151.6 140
Velocity of flue gas W m/S 0.6/ 1.7 6.9 9.4/ 11.5 12/
0.25 9.1 8
Figure one is structural representation of the present invention
Claims (2)
1, a kind of recirculation Boiling Combustion Industrial Boiler, it comprises formations such as boiler body and coal-storing hopper, coal conveyor, economizer, air preheater, blower unit, it is characterized in that boiler body has the fine coal bed of fractional combustion and do not establish the beans bed of pipe laying, fly ash separator, flying dust conveyer and flue gas recycled pipe-line system are housed behind the boiler body, the storage coal of boiler and the part of delivering coal are formed by two coal-storing hoppers and two cover coal conveyors, in order to store and to carry beans and fine coal to corresponding coal bed respectively.
2, by the described Industrial Boiler of claim 1., it is characterized in that it is the siege of 1～6 millimeter coal grain that so-called beans bed is meant in order to burning diameter, so-called fine coal bed is meant in order to burning diameter to be the siege of 0～2 millimeter fine coal, and the area of fine coal bed air distribution plate is greater than the area of beans bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88209420 CN2033470U (en) | 1988-08-05 | 1988-08-05 | Step-rate, dowble bed, cycling fluidized-bed combustion boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88209420 CN2033470U (en) | 1988-08-05 | 1988-08-05 | Step-rate, dowble bed, cycling fluidized-bed combustion boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2033470U true CN2033470U (en) | 1989-03-01 |
Family
ID=4843070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88209420 Withdrawn CN2033470U (en) | 1988-08-05 | 1988-08-05 | Step-rate, dowble bed, cycling fluidized-bed combustion boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2033470U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100501234C (en) * | 2004-07-09 | 2009-06-17 | 马加尔迪能源股份公司 | Integrated system for the extraction of heavy ash, conversion thereof into light ash and reduction of unburnt matter |
| CN101576246B (en) * | 2009-06-23 | 2010-07-21 | 李明江 | Group-level coal-fired electric generation furnace |
| CN104566350A (en) * | 2014-12-31 | 2015-04-29 | 国家电网公司 | Fly Ash Recirculation System to Reduce Boiler Coking |
| CN104748104A (en) * | 2015-03-13 | 2015-07-01 | 江苏盛凯环保工程有限公司 | Coupling staged combustion and smoke recirculation low NOx chain grate furnace |
-
1988
- 1988-08-05 CN CN 88209420 patent/CN2033470U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100501234C (en) * | 2004-07-09 | 2009-06-17 | 马加尔迪能源股份公司 | Integrated system for the extraction of heavy ash, conversion thereof into light ash and reduction of unburnt matter |
| CN101576246B (en) * | 2009-06-23 | 2010-07-21 | 李明江 | Group-level coal-fired electric generation furnace |
| CN104566350A (en) * | 2014-12-31 | 2015-04-29 | 国家电网公司 | Fly Ash Recirculation System to Reduce Boiler Coking |
| CN104748104A (en) * | 2015-03-13 | 2015-07-01 | 江苏盛凯环保工程有限公司 | Coupling staged combustion and smoke recirculation low NOx chain grate furnace |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |