CN105066157B - A kind of tail recuperation of heat cleaning type coal-burning boiler - Google Patents
A kind of tail recuperation of heat cleaning type coal-burning boiler Download PDFInfo
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- CN105066157B CN105066157B CN201510496273.4A CN201510496273A CN105066157B CN 105066157 B CN105066157 B CN 105066157B CN 201510496273 A CN201510496273 A CN 201510496273A CN 105066157 B CN105066157 B CN 105066157B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a kind of tail recuperation of heat cleaning type coal-burning boiler, including boiler body and air-introduced machine, the offgas duct of boiler body successively empties after air preheater, water preheater, cyclone dust collectors connect air-introduced machine with granite duster；The inlet end connection air blower of air preheater shell side, outlet side connection boiler body；The water inlet pipe connection head-tank of water preheater shell side, outlet pipe connection boiler feed water pump；It is hollow anti-water-drop-shaped that the draught fan impeller, which has blade, and backboard is dish-shaped structure；Air-introduced machine appearance profile line is involute.The present invention realizes tail recuperation of heat and dust removal operation by carrying out two-stage countercurrent heat exchange and dry, wet two-stage dedusting to boiler exhaust gas, realizes energy-saving and emission-reduction；Blade is hollow anti-water-drop-shaped, and backboard realizes the real-time cleaning of dust on draught fan impeller and increase the impeller intensity of blower fan for the structure of dish, enhances stability and effectively prevents the security incident that dust accumulation triggers, has a extensive future.
Description
Technical field
The present invention relates to a kind of coal-burning boiler, refer specifically to air-introduced machine will not laying dust tail recuperation of heat cleaning type coal-burning boiler.
Background technology
Boiler is to use very universal thermodynamic apparatus, and coal-burning boiler is still because technology maturation, fuel cost are low
One of main preferred unit of heat supply, but coal-burning boiler is warm due to carrying flue dust, sulfur dioxide and tail in emission secretly, so needing
To enter the operation of end of line recuperation of heat, dedusting, cleaning harmful gas etc. to tail gas.
Air-introduced machine is the key equipment that coal-burning boiler realizes tail recuperation of heat and dedusting, and draught fan for boiler is mostly centrifugation wind
Machine, air-introduced machine it is continuous, stably, reliably working it is very crucial, the occasion used due to coal-burning boiler is mostly all containing certain
Dust, when air-introduced machine works, air-flow during the draught fan impeller of high speed rotation by that can be departed from due to centrifugation, dust granule
Air-flow phase and deposit and be attached on draught fan impeller.
Because draught fan impeller rotating speed is general all higher, as long as with the presence of micro dust in air-flow, after working long hours all
More dust can be accumulated, so as to change the balance of draught fan impeller rotation, if draught fan impeller does not have self purification to dust
Also do not clear up in time, will static state cumulative and that draught fan impeller is altered in steps and dynamic equilibrium, so as to produce vibration.
Come off once the dust that running into has part hardened is vibrated, the dynamic rotary away from air-introduced machine will balance, then produce immediately
Judder, this may trigger serious personnel and equipment safety accident.
Therefore, if a kind of coal-burning boiler draught fan impeller can be designed, automatic cleaning can be carried out and just do not have to worry
Cause dust to accumulate, all there is especially important meaning for keeping the reliable and stable work of air-introduced machine and preventing security incident.
On the other hand, substantial amounts of heat energy and dust are often contained in the tail gas of coal-burning boiler discharge, if can effectively reclaim
And dedusting, for improving the efficiency of boiler, and realize that energy-saving and emission-reduction are all significant.
The content of the invention
The technical problem to be solved in the present invention is exactly overcome the deficiencies in the prior art, there is provided a kind of simple and practical, energy
The tail recuperation of heat cleaning type coal-burning boiler of dust on automatic cleaning draught fan impeller.
For overcome the deficiencies in the prior art, the present invention takes following technical scheme：
A kind of tail recuperation of heat cleaning type coal-burning boiler, including boiler body and air-introduced machine, it is characterised in that：Boiler body
Offgas duct successively empties after air preheater, water preheater, cyclone dust collectors connect air-introduced machine with granite duster；Air is pre-
The inlet end connection air blower of hot device shell side, outlet side connection boiler body；The water inlet pipe of water preheater shell side connects high-order water
Pond, outlet pipe connection boiler feed water pump；The air-introduced machine includes draught fan impeller and casing, and draught fan impeller includes impeller backboard, leaf
Panel and blade are taken turns, for blade arrangement into impeller Axial and radial, centrosymmetric hollow anti-water-drop-shaped, impeller backboard is dish；It is hollow
Anti- water-drop-shaped blade connects impeller panel and is welded to form impeller bodies with dish-shaped impeller backboard；Impeller panel be provided with air inlet,
Dish-shaped impeller backboard is fixed by rivet and connection shaft seat, axle bed are connected by axis hole and fan shaft；Casing is provided with
Air inlet and air outlet, cabinet form contour line are involutes, the round heart of involute and blower fan axis coinciding, and involute is from casing
Start on the inside of air outlet, line radius is gradually increased with involute circle, is terminated to shell air outlet outside, shell air outlet width
Equal to involute circumference；Shell air inlet is provided with cover plate, also has air inlet to be easy to connecting pipe, and axle center and impeller on cover plate
Axis coinciding.
The hollow anti-water-drop-shaped blade is combined into by the welding of two panels Curved surface metal, and has symmetrical streamline profile.
The casing is fixed on support.Casing plays sealing process, and air inlet air inlet is rotated by impeller obtains kinetic energy,
And energy conversion is carried out in casing, a part of kinetic energy is converted to the static energy of gas, so makes output gas flow that there is speed to move
Pressure head also has hydrostatic head, and both sums are exactly blower press.
Shell air inlet can connect airduct according to need, and air intake velar plate is detachable, be bolted to connection casing, machine
The scroll casing shape of shell gradually opens profile and meets closed Fan casing, conveying gas while the needs for realizing energy efficient conversion, makes output gas
Stream can reach required flow and total head.
The shell air inlet cover plate is bolted to connection casing, and can dismantle.
Chimney is provided with the air-introduced machine emptying.
When boiler works, air is blasted to boiler body by air blower, promotes coal completely burned, coal-burning boiler is generally all
Micro-vacuum state is operated in, so all needing to configure air-introduced machine, the pressure output that the continuous-stable of air-introduced machine works for tail gas is arranged
Put, and tail recuperation of heat and dust separation are all especially important.
Air preheater by the boiler exhaust gas containing used heat, air blower from top to bottom blast air in air preheater with
High-temperature tail gas carries out wall-type heat exchange, improves and blasts the air themperature of boiler to effectively facilitate coal combustion, realizes first step tail heat
Reclaimer operation.
Water preheater is subsequently entered from the boiler exhaust gas of air preheater discharge, from top to bottom passes through shell and tube water preheater
Tube side carries out countercurrent flow with entering the softened water of shell side from head-tank, realizes second step tail recuperation of heat.
Water after heating enters boiler by the pressurization of boiler feed water pump, and boiler feed water pump is two parallel pumps to improve water supply
Reliability, tail gas are out entered cyclone dust collectors by water preheater bottom and carry out first step dry method dust, central tube discharge tail gas
Granite duster is tangentially entered by interface tube, swirling eddy is from top to bottom carried under the multichannel jet pipe water smoke of annular conduit importing
OK, the dedusting again of whirlwind wet method is realized, settling tank supernatant carries out circulated sprinkling by pump, and deposition flue dust can fit in settling tank
Shi Qingli, addition limewash or spent lye can absorb the pernicious gas in tail gas；Pass through the recuperation of heat of two-stage tail and two-stage gas
Moist tail gas after purified treatment is discharged by chimney by air-introduced machine pressurized delivered, it is net with dedusting also just to complete tail recuperation of heat
Change is handled.
The draught fan impeller of the present invention is in use, because blade design is into hollow anti-water-drop-shaped, and sharf radial center
Symmetrically, thus at a high speed rotate when, blade surface under the action of the centrifugal force have centrifugation self purification, make dust by centrifugation masterpiece
With and can not adhere to, do not interfere with dynamic, the static balancing of impeller thus, will not more accumulate dust；This blade construction
Technical scheme, it is particularly suitable for the big wide impeller air-introduced machine of delivery air amount and uses.
Compared with the impeller backboard of common air-introduced machine, the characteristics of dish-shaped impeller backboard and advantage is：When steel plate thickness is the same
When, dish-shaped backboard is due to rigidity reinforced, stress is scattered, elastic buffer improves and shape stability also greatly improves, thus
Bearing capacity can be enhanced about more than once on the basis of common flat backboard.Because backboard almost carries whole fans loads, so
Dish is made in backboard can be more durable, and the wheel hub of truck is because have disc structure, bearing capacity enhancing, also more
It is durable.
Compared with prior art, beneficial effects of the present invention also reside in：
Boiler exhaust gas is exchanged heat by two-stage countercurrent and tail recuperation of heat and dust removal operation are realized in dry, wet two-stage dedusting, can be with
Consumption and the environmental protection of coal are effectively reduced, can be with although the longer recuperation of heat in exhaust emissions path and dedusting are all more thoroughly
Produce more significant effects of energy saving and emission reduction, it may have preferable economic benefit.
Blade design is into hollow anti-water-drop-shaped, and sharf radial center is symmetrical, makes its blower fan backboard connected and face
The anti-relative torsion of plate, extruding rigidity are extremely strong, the fracture of fan blade connection backboard root caused by can preventing long-time use.
Blade design is into hollow anti-water-drop-shaped, and sharf radial center is symmetrical, even with relatively thin board making wind
Machine impeller can also obtain higher intensity, ensure stable, reliable use, can save material, be easy to make, be also beneficial to equipment
Light and handyization.
Hollow anti-water-drop-shaped blade has streamline profile, and steadily skimming over property is fabulous for blade air, so fan operation noise
It is especially small, improve working environment.
The present invention by Vanes on Induced Draft Fan ingehious design into hollow anti-water-drop-shaped, and the symmetrical shape of sharf radial center,
The real-time cleaning of dust on blade is realized, the service life of equipment is extended and can effectively prevent the safety that dust accumulation triggers
Accident, have a extensive future.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of the present invention
Fig. 2 is the planar structure schematic diagram of draught fan impeller.
Fig. 3 is the cross-sectional view of draught fan impeller.
Fig. 4 is the planar structure schematic diagram of air-introduced machine.
Each label represents in figure：
A, air-introduced machine；1st, coal-burning boiler main body；2nd, air preheater；3rd, air blower；4th, water preheater；5th, cyclone dust removal
Device；6th, boiler feed water pump；7th, relief tube；8th, head-tank；9th, tail gas tangential inlet；10th, granite duster；11st, 12 it is, ring
Shape water pipe；13rd, chimney；14th, circulating pump；15th, cesspool；16th, sub-cylinder；17th, safety valve；31st, anti-water-drop-shaped blade；32nd, leaf
Take turns cylindrical；33rd, impeller air inlet；34th, axle bed；35th, rivet；36th, axis hole；37th, dish-shaped impeller backboard；38th, impeller panel；41、
Impeller；42nd, shell air inlet；43rd, involute is justified；44th, support；45th, casing；46th, shell air inlet cover plate；47th, casing air-out
Mouthful；B, shell air outlet width.
Embodiment
In conjunction with accompanying drawing, the present invention is further elaborated with.
Tail recuperation of heat cleaning type coal-burning boiler as shown in Figure 1, Figure 2, Figure 3 and Figure 4, including boiler body 1 and air-introduced machine A,
The offgas duct of boiler body 1 is successively drawn through the connection of air preheater 2, water preheater 4, cyclone dust collectors 5 and granite duster 10
Emptied after blower fan A；The inlet end connection air blower 3 of the shell side of air preheater 2, outlet side connection boiler body 1；Water preheater 4
The water inlet pipe connection head-tank 8 of shell side, outlet pipe connection boiler feed water pump 6；The air-introduced machine includes draught fan impeller 41 and machine
Shell 45, draught fan impeller 41 include impeller backboard 37, impeller panel 38 and blade 31, and blade 31 is arranged to impeller Axial and radial, center
Symmetrical hollow anti-water-drop-shaped, impeller backboard 37 are dish；Hollow anti-water-drop-shaped blade 31 connect impeller panel 38 and with dish
Impeller backboard 37 is welded to form impeller bodies；It is solid by rivet 35 that impeller panel 38 is provided with air inlet 33, dish-shaped impeller backboard 37
Fixed and connection shaft seat 34, axle bed 34 are connected by axis hole 36 with fan shaft；Casing 45 is provided with air inlet 42 and air-out
Mouth 47, cabinet form contour line are involute, the round heart of involute and blower fan axis coinciding, and involute is out of shell air outlet 47
Side starts, and line radius is gradually increased with involute circle, terminates to the outside of shell air outlet 47, shell air outlet width B is equal to
Involute justifies 43 girths；Shell air inlet 42 is provided with cover plate 46, also has air inlet to be easy to connecting pipe, and axle center and leaf on cover plate
Take turns axis coinciding.
The hollow anti-water-drop-shaped blade 31 is combined into by the welding of two panels Curved surface metal, and has symmetrical streamline profile.
The casing 45 is fixed on support 44.Casing 45 plays sealing process, and the air inlet of air inlet 42 is revolved by impeller 41
Turn to obtain kinetic energy, and energy conversion is carried out in casing 45, a part of kinetic energy is converted to the static energy of gas, so makes output gas
There is stream speed dynamic head to also have hydrostatic head, and both sums are exactly blower press.
Shell air inlet 42 can connect airduct according to need, and air intake velar plate 46 is detachable, is bolted to connection machine
Shell 45, the scroll casing shape of casing 45 gradually open profile and meet closed Fan casing, conveying gas while the needs for realizing energy efficient conversion,
Output gas flow is set to reach required flow and total head.
The shell air inlet cover plate 46 is bolted to connection casing 15, and can dismantle.
Chimney 13 is provided with the air-introduced machine A emptyings.
When boiler works, air is blasted to boiler body 1 by air blower 3, promotes coal completely burned, coal-burning boiler is usual
Micro-vacuum state is all operated in, so all needing to configure air-introduced machine A, the pressure that air-introduced machine A continuous-stable works for tail gas is defeated
Go out to discharge, and tail recuperation of heat and dust separation are all especially important.
For air preheater 2 by the boiler exhaust gas containing used heat, air blower 3 from top to bottom blasts air in air preheater 2
In with high-temperature tail gas carry out wall-type heat exchange, improve and blast the air themperature of boiler 1 to effectively facilitate coal combustion, realize the first step
Tail heat recovery operation.
The boiler exhaust gas discharged from air preheater 2 subsequently enters water preheater 4, is from top to bottom preheated by shell and tube water
Device tube side carries out countercurrent flow with entering the softened water of shell side from head-tank 8, realizes second step tail recuperation of heat.
Water after heating enters boiler by the pressurization of boiler feed water pump 6, and boiler feed water pump 6 is that two parallel pumps supply water to improve
Reliability, tail gas out enters cyclone dust collectors 5 by the bottom of water preheater 4 and carries out first step dry method dust, and central tube is discharged
Tail gas tangentially enters granite duster 10 by interface tube 9, and swirling eddy from top to bottom carries the multichannel of the importing of annular conduit 11,12
Jet pipe water smoke is descending, realizes the dedusting again of whirlwind wet method, and the supernatant of settling tank 15 carries out circulated sprinkling, settling tank 15 by pump 14
Interior deposition flue dust can be cleared up in good time, and pernicious gas in tail gas can be absorbed by adding limewash or spent lye；Pass through two-stage tail
Recuperation of heat, by air-introduced machine A pressurized delivereds, is discharged by chimney 13, also just completed with the moist tail gas after two-stage gas purified treatment
Tail recuperation of heat is handled with dust separation.
The draught fan impeller of the present invention is in use, because blade design is into hollow anti-water-drop-shaped, and sharf radial center
Symmetrically, thus at a high speed rotate when, blade surface under the action of the centrifugal force have centrifugation self purification, make dust by centrifugation masterpiece
With and can not adhere to, do not interfere with dynamic, the static balancing of impeller thus, will not more accumulate dust；This blade construction
Technical scheme, it is particularly suitable for the big wide impeller air-introduced machine of delivery air amount and uses.
Compared with the impeller backboard of common air-introduced machine, the characteristics of dish-shaped impeller backboard 37 and advantage is：When steel plate thickness one
During sample, dish-shaped backboard is due to rigidity reinforced, stress is scattered, elastic buffer improves and shape stability also greatly improves, because
And bearing capacity can be enhanced about more than once on the basis of common flat backboard.Because backboard almost carries whole fans loads, institute
Dish is made with backboard can be more durable, and the wheel hub of truck is because have disc structure, bearing capacity enhancing, also more
Add durable.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any formal limitation to the present invention.It is any to be familiar with sheet
The technical staff in field, in the case where not departing from technical solution of the present invention scope, all using the technology contents of the disclosure above
Many possible changes and modifications are made to technical solution of the present invention, or are revised as the equivalent embodiment of equivalent variations.Therefore, it is all
It is the content without departing from technical solution of the present invention, any is simply repaiied to made for any of the above embodiments according to the technology of the present invention essence
Change, equivalent variations and modification, all should fall in the range of technical solution of the present invention protection.
Claims (5)
1. a kind of tail recuperation of heat cleaning type coal-burning boiler, including boiler body and air-introduced machine, it is characterised in that：The tail of boiler body
Tracheae successively empties after air preheater, water preheater, cyclone dust collectors connect air-introduced machine with granite duster；Air preheat
The inlet end connection air blower of device shell side, outlet side connection boiler body；The water inlet pipe connection head-tank of water preheater shell side,
Outlet pipe connects boiler feed water pump；The air-introduced machine includes draught fan impeller and casing, and draught fan impeller includes impeller backboard, impeller face
Plate and blade, for blade arrangement into impeller Axial and radial, centrosymmetric hollow anti-water-drop-shaped, impeller backboard is dish；It is hollow to turn one's coat
Drop shape blade connection impeller panel is simultaneously welded to form impeller bodies with dish-shaped impeller backboard；Impeller panel is provided with air inlet, dish
Impeller backboard is fixed by rivet and connection shaft seat, axle bed are connected by axis hole and fan shaft；Casing is provided with air intake
Mouthful and air outlet, cabinet form contour line be involute, the round heart of involute and blower fan axis coinciding, involute is from casing air-out
Intraoral side starts, and line radius is gradually increased with involute circle, terminates to shell air outlet outside, shell air outlet width is equal to
Involute circumference；Shell air inlet is provided with cover plate, also has air inlet to be easy to connecting pipe, and axle center and impeller axle center on cover plate
Overlap.
2. tail recuperation of heat cleaning type coal-burning boiler according to claim 1, it is characterised in that：The hollow anti-water-drop-shaped blade
It is combined into by the welding of two panels Curved surface metal, and there is symmetrical streamline profile.
3. tail recuperation of heat cleaning type coal-burning boiler according to claim 1 or claim 2, it is characterised in that：The casing is fixed on machine
On seat.
4. tail recuperation of heat cleaning type coal-burning boiler according to claim 1 or claim 2, it is characterised in that：The shell air inlet lid
Plate is bolted to connection casing, and can dismantle.
5. tail recuperation of heat cleaning type coal-burning boiler according to claim 1 or claim 2, it is characterised in that：At the air-introduced machine emptying
Provided with chimney.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510496273.4A CN105066157B (en) | 2015-08-14 | 2015-08-14 | A kind of tail recuperation of heat cleaning type coal-burning boiler |
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| CN201510496273.4A CN105066157B (en) | 2015-08-14 | 2015-08-14 | A kind of tail recuperation of heat cleaning type coal-burning boiler |
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| CN105066157A CN105066157A (en) | 2015-11-18 |
| CN105066157B true CN105066157B (en) | 2017-11-28 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698153B (en) * | 2016-02-22 | 2018-08-07 | 合肥龙图腾信息技术有限公司 | Numb stone wet dedusting formula energy-saving coal fired boiler |
| CN105650659B (en) * | 2016-02-22 | 2018-07-13 | 长沙天宁热电有限公司 | Whirlwind wet dedusting formula energy-saving coal fired boiler |
| CN105757709B (en) * | 2016-02-22 | 2019-01-08 | 南京浦口科创投资集团有限公司 | Two-stage heat reclamation type cyclone dust removal coal-burning boiler |
| CN105650660B (en) * | 2016-02-22 | 2018-10-19 | 诸暨市志缇生物科技有限公司 | Coil pipe tandem type whirlwind wet dedusting coal-burning boiler |
| CN105597947B (en) * | 2016-03-05 | 2018-01-19 | 江苏智慧优视电子科技有限公司 | Air-introduced machine is easy to the cyclone type mineral floating defoaming device disassembled |
| CN106110870B (en) * | 2016-08-31 | 2018-07-13 | 苏州贝捷环保设备有限公司 | Coal-burning boiler dry dust removal and system for desulfuration and denitration |
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| CN101101008A (en) * | 2007-08-01 | 2008-01-09 | 深圳市龙岗区金怡信电子厂 | Centrifugal fan and aeration device with indoor air purifying function |
| CN201050793Y (en) * | 2007-04-26 | 2008-04-23 | 熊选祖 | Boiler high-performance energy-saving dust-removing preheating system |
| CN102022376A (en) * | 2010-11-05 | 2011-04-20 | 聂伟 | Suction fan impeller of mower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU889899A1 (en) * | 1980-03-31 | 1981-12-15 | Запорожский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Автомобильный Завод "Коммунар" | Fan impeller |
| CN201050793Y (en) * | 2007-04-26 | 2008-04-23 | 熊选祖 | Boiler high-performance energy-saving dust-removing preheating system |
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| CN105066157A (en) | 2015-11-18 |
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Inventor after: Xu Li Inventor before: Yin Yongzhong Inventor before: Yao Maojun Inventor before: Li Zhiping Inventor before: Zhang Xu Inventor before: Yang Zhenghua |
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Effective date of registration: 20171027 Address after: Six groups of 224000 joint village in Jiangsu province Yancheng City District Dagang Town (Yancheng City Dagang District petroleum shoemaking equipment Industrial Park) (N) Applicant after: Yancheng easy Technology Co., Ltd. Address before: 416000 Hunan, Xiangxi Tujia and Miao Autonomous Prefecture, Jishou City People's road, No. 120 Applicant before: Jishou University |
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Effective date of registration: 20201216 Address after: No.2 building, medical machinery industrial park, west section of Daxue Road, Wanfu office, hi tech Zone, Heze City, Shandong Province Patentee after: Shandong Green Kairui Precision Instrument Co.,Ltd. Address before: 224000 group 6, Lianhe village, Dagang Town, Yandu District, Yancheng City, Jiangsu Province (n) Patentee before: YANCHENG YANYI TECHNOLOGY Co.,Ltd. |
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