CN105003927B - A kind of tail recuperation of heat dedusting integral type coal-burning boiler - Google Patents
A kind of tail recuperation of heat dedusting integral type coal-burning boiler Download PDFInfo
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- CN105003927B CN105003927B CN201510496328.1A CN201510496328A CN105003927B CN 105003927 B CN105003927 B CN 105003927B CN 201510496328 A CN201510496328 A CN 201510496328A CN 105003927 B CN105003927 B CN 105003927B
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Abstract
The invention discloses a kind of tail recuperation of heat dedusting integral type coal-burning boilers, the tangentially connected cyclone dust collectors of boiler exhaust gas pipe, dust is discharged by wind stopping device at cone bottom after rotational flow dust-removing, tail gas connects cone by eddy flow tedge, tubulation is passed through after being uniformly dispersed, and is discharged by air-introduced machine by exhaust pipe after being concentrated by top cone bucket；It is hollow anti-water-drop-shaped that the draught fan impeller, which has blade, and backboard is the structure of dish；Air-introduced machine appearance profile line is involute.The recuperation of heat of boiler tail and dedusting are carried out creativeness and integrated by the present invention, design the hot high-efficiency recoverer of cyclone dust removal tail, are completed tail recuperation of heat and one step of dedusting, are reduced equipment investment and also improve working efficiency；Blade is hollow anti-water-drop-shaped, and backboard realizes the real-time of dust on draught fan impeller for the structure of dish and clears up and increase the impeller intensity of blower, enhances stability and effectively prevents the safety accident that dust accumulation causes, 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 dust accumulation tail recuperation of heat dedusting integral type fire coal pot
Furnace.
Background technique
Boiler is using very universal thermodynamic apparatus, and coal-burning boiler is still since 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
The operation of tail recuperation of heat, dedusting, cleaning harmful gas etc. is carried out 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, the continuous, stable of air-introduced machine, reliably working are very crucial, since the occasion that coal-burning boiler uses all contains centainly mostly
Dust, when air-introduced machine works, air-flow is by the way that, due to centrifugation, dust granule can be detached from when high-speed rotating draught fan impeller
Air-flow phase and deposit and be attached on draught fan impeller.
Since draught fan impeller revolving speed is generally all higher, as long as with the presence of micro dust in air-flow, after working long hours all
More dust can be accumulated, 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 and dynamic equilibrium cumulative and that draught fan impeller is altered in steps, to generate vibration.
It falls off once the dust that encountering has part hardened is vibrated, the dynamic rotary far from air-introduced machine will balance, then generate immediately
Judder, this may cause serious personnel and equipment safety accident.
Therefore, it if a kind of coal-burning boiler draught fan impeller can be designed, can carry out clearing up automatically just without worrying
It causes dust to accumulate, there is especially important meaning for keeping the reliable and stable work of air-introduced machine and preventing safety accident all.
On the other hand, often contain a large amount of thermal energy and dust in the tail gas of coal-burning boiler discharge, if can effectively recycle
And dedusting, for the efficiency of raising boiler, and realize that energy-saving and emission-reduction are all of great significance.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the shortcomings of the prior art and provide a kind of simple and practical in structure, energy
The tail recuperation of heat dedusting integral type coal-burning boiler of dust on automatic cleaning draught fan impeller.
In order to overcome the deficiencies of the prior art, the present invention takes following technical scheme:
A kind of tail recuperation of heat dedusting integral type coal-burning boiler, including boiler body, boiler exhaust gas pipe, boiler water blow-down pipe, rotation
The hot high-efficiency recoverer of wind dedusting tail and air-introduced machine, it is characterised in that；The hot high-efficiency recoverer of cyclone dust removal tail is by tubular heat exchanger
It is formed by stacking with cyclone dust collectors, the tangentially connected cyclone dust collectors of boiler exhaust gas pipe, passes through wind stopping device at cone bottom after rotational flow dust-removing
Dust is discharged, tail gas connects cone by eddy flow tedge, tubulation is passed through after being uniformly dispersed, by drawing after being concentrated by top cone bucket
Blower is discharged by exhaust pipe；Head-tank connects tubular heat exchanger shell side lower part, and tubular heat exchanger shell side top is through boiler feedwater
Pump connection boiler body；The air-introduced machine includes draught fan impeller and casing, and draught fan impeller includes impeller backboard, impeller panel and leaf
Piece, blade arrangement radial, centrosymmetric hollow anti-water-drop-shaped at impeller shaft, impeller backboard is dish；Hollow anti-water-drop-shaped leaf
Piece connection impeller panel is simultaneously welded to form impeller bodies with dish-shaped impeller backboard；Impeller panel is equipped with air inlet, dish-shaped impeller back
Plate is fixed by rivet and connection shaft seat, axle bed are cooperatively connected by axis hole and fan shaft；Casing is equipped with air inlet and goes out
Air port, cabinet form contour line are involutes, and the round heart of involute is overlapped with blower axle center, and involute is on the inside of shell air outlet
Start, scribing line radius is gradually increased with involute circle, is terminated to shell air outlet outside, shell air outlet width is equal to involute
Circumference；Shell air inlet is equipped with cover board, also has air inlet convenient for connecting pipe on cover board, and axle center and impeller axle center are overlapped.
The tangentially connected cyclone dust collectors of boiler water blow-down pipe realize the cleaning to grease in cyclone dust collectors and crock.
The hollow anti-water-drop-shaped blade is combined by the welding of two panels Curved surface metal, and has symmetrical streamline shape.
The casing is fixed on base.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, makes output gas flow dynamic with speed in this way
For pressure head there are also hydrostatic head, sum of the two is exactly blower press.
Shell air inlet can connect air hose according to need, and air inlet 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 to export gas
Stream can achieve required flow and total pressure.
The shell air inlet cover board is bolted to connection casing, and can dismantle.
Coal-burning boiler usually all works in micro-vacuum state, so all needing configuration air-introduced machine, the continuous-stable work of air-introduced machine
Work is all especially important for the pressure output discharge and tail recuperation of heat and dust separation of tail gas.
Boiler excludes combustion tail gas by offgas duct, and high-temperature tail gas contains a large amount of thermal energy, efficiently using cyclone dust removal tail heat
Recover is dusted and recuperation of heat, and tail gas tangentially enters cyclone dust collectors through entrance, in cyclone dust collectors inward eddy dedusting,
It bores bottom and dust is discharged by wind stopping device, tail gas dissipates uniformly after passing back through eddy flow tedge connection cone point, tubulation is passed through, by upper
After portion's cone bucket is concentrated, attract through air-introduced machine, the tail gas through dedusting and recuperation of heat is discharged by exhaust pipe.
Heat exchanging device shell side outer wall realizes rotational-flow high-efficient heat exchange to high-temperature tail gas rotational flow dust-removing simultaneously, exports head-tank
Soft water heating, dedusting tail gas pass back through tubulation once again, and carrying out the recuperation of heat of second step tail makes soft water heat up once again；In head-tank
Soft water enters tubular heat exchanger shell side lower part by pipeline, exchanges heat with tail gas and connect feed pump from shell side top by pipeline,
It supplies water to boiler.
Boiler blowdown water tangentially enters cyclone dust collectors by sewage pipe, boiler blowdown water be under boiler pressure state,
The excessively high superheated water of basicity in appropriate discharge drum, after merging air-flow enters cyclone dust collectors, particularly advantageous sewerage is to whirlwind
Grease is rinsed with crock in deduster.
Draught fan impeller of the invention is in use, since blade design is at hollow anti-water-drop-shaped, and sharf radial center
Symmetrically, thus when high speed rotation, blade surface has centrifugation self purification under the action of the centrifugal force, makes dust by centrifugation masterpiece
With and can not adhere to, thus will not influence dynamic, the static balancing of impeller, will not more accumulate dust；This blade construction
Technical solution 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 are as follows: when steel plate thickness is the same
When, dish-shaped backboard due to rigidity reinforced, stress dispersion, elastic buffer improve and shape stability also greatly improve, thus
Bearing capacity can be enhanced about more than once on the basis of common flat backboard.Since 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:
The recuperation of heat of boiler tail and dedusting are carried out creativeness to integrate, the hot high-efficiency recoverer of cyclone dust removal tail is designed, makes tail
Recuperation of heat and one step of dedusting are completed, and are reduced equipment investment and are also improved working efficiency；Tail gas rotation outside by heat exchanger shell pass
Stream rises with the tail gas in heat exchanger tube, carries out two step high efficient heat exchangings and tail recuperation of heat, ultrahigh in efficiency, tail heat utilization heat are not filled
Point；Boiler blowdown water is especially efficiently convenient for removing grease in cyclone separator, crock.
Blade design is at hollow anti-water-drop-shaped, and sharf radial center is symmetrical, the blower backboard for connecting it and face
The anti-relative torsion of plate, extruding rigidity are extremely strong, can prevent the fracture of the connection of fan blade caused by long-time use backboard root.
Blade design is at 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, guarantee to stablize, reliably use, can save material, convenient for production, be also beneficial to equipment
Light and handyization.
Hollow anti-water-drop-shaped blade has streamline shape, 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 at hollow anti-water-drop-shaped, and the symmetrical shape of sharf radial center,
The real-time cleaning for realizing dust on blade extends the service life of equipment and can effectively prevent the safety that dust accumulation causes
Accident has a extensive future.
Detailed description of the invention
Fig. 1 is planar structure schematic diagram of the invention
Fig. 2 is the planar structure schematic diagram of draught fan impeller.
Fig. 3 is the schematic diagram of the section structure of draught fan impeller.
Fig. 4 is the planar structure schematic diagram of air-introduced machine.
Each label indicates in figure:
A, air-introduced machine；1, coal-burning boiler main body；2, boiler water blow-down pipe；3, offgas duct；4, the hot high efficiente callback of cyclone dust removal tail
Device；5, tangential inlet；6, tubular heat exchanger；7, cyclone dust collectors；8, tubulation；9, eddy flow tedge；10, wind stopping device；11, boiler
Feed pump；12, exhaust pipe；13, head-tank；31, anti-water-drop-shaped blade；32, impeller outer circle；33, impeller air inlet；34, axis
Seat；35, rivet；36, axis hole；37, dish-shaped impeller backboard；38, impeller panel；41, impeller；42, shell air inlet；43, it gradually opens
Line circle；44, base；45, casing；46, shell air inlet cover board；47, shell air outlet；B, shell air outlet width.
Specific embodiment
Now in conjunction with attached drawing, the present invention is further elaborated with.
Tail recuperation of heat dedusting integral type coal-burning boiler as shown in Figure 1, Figure 2, Figure 3 and Figure 4, including boiler body 1, boiler tail
The hot high-efficiency recoverer 4 of tracheae 3, boiler water blow-down pipe 2, cyclone dust removal tail and air-introduced machine A, the hot high-efficiency recoverer 4 of cyclone dust removal tail by
Tubular heat exchanger 6 and cyclone dust collectors 7 are formed by stacking, the tangentially connected cyclone dust collectors 7 of boiler exhaust gas pipe 3, after rotational flow dust-removing
Dust is discharged by wind stopping device 10 at cone bottom, tail gas connects cone by eddy flow tedge 9, tubulation is passed through after being uniformly dispersed, by
Top cone bucket is discharged by air-introduced machine A by exhaust pipe 12 after concentrating；Head-tank 13 connects 6 shell side lower part of tubular heat exchanger, column
6 shell side top of heat exchange of heat pipe connects boiler body 1 through boiler feed pump 11；The air-introduced machine includes draught fan impeller 41 and casing
45, draught fan impeller 41 includes impeller backboard 37, impeller panel 38 and blade 31, and blade 31 is arranged to impeller shaft radial direction, center pair
The hollow anti-water-drop-shaped claimed, impeller backboard 37 are dish；Hollow anti-water-drop-shaped blade 31 connect impeller panel 38 and with dish-shaped leaf
Wheel backboard 37 is welded to form impeller bodies；It is fixed by rivet 35 that impeller panel 38 is equipped with air inlet 33, dish-shaped impeller backboard 37
And connection shaft seat 34, axle bed 34 are cooperatively connected by axis hole 36 with fan shaft；Casing 45 is equipped with air inlet 42 and air outlet
47, cabinet form contour line is involute, and the round heart of involute is overlapped with blower axle center, and involute is on the inside of shell air outlet 47
Start, scribing line radius with involute circle is gradually increased, to shell air outlet 47 on the outside of terminate, shell air outlet width B be equal to gradually
Burst at the seams 43 perimeters of circle；Shell air inlet 42 is equipped with cover board 46, also has air inlet to be convenient for connecting pipe, and axle center and impeller on cover board
Axle center is overlapped.
The tangentially connected cyclone dust collectors 7 of the boiler water blow-down pipe 2 are realized to the clear of grease in cyclone dust collectors and crock
It washes.
The hollow anti-water-drop-shaped blade 31 is combined by the welding of two panels Curved surface metal, and has symmetrical streamline shape.
The casing 45 is fixed on base 44.Casing 45 plays sealing process, and 42 air inlet of air inlet is revolved by impeller 41
Turn to obtain kinetic energy, and carry out energy conversion in casing 45, a part of kinetic energy is converted to the static energy of gas, makes to export gas in this way
Stream has speed dynamic head there are also hydrostatic head, and sum of the two is exactly blower press.
Shell air inlet 42 can connect air hose according to need, and air inlet velar plate 46 is detachable, be 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 can achieve required flow and total pressure.
The shell air inlet cover board 46 is bolted to connection casing 15, and can dismantle.
Coal-burning boiler usually all works in micro-vacuum state, so all needing configuration air-introduced machine A, the continuous-stable of air-introduced machine A
It works all especially important for the pressure output discharge and tail recuperation of heat and dust separation of tail gas.
Boiler excludes combustion tail gas by offgas duct 3, and high-temperature tail gas contains a large amount of thermal energy, efficiently using cyclone dust removal tail heat
Recover 4 is dusted and recuperation of heat, and tail gas tangentially enters cyclone dust collectors 7 through entrance 5, removes in 7 inward eddy of cyclone dust collectors
Dust is discharged by wind stopping device 10 at cone bottom in dirt, and tail gas, which passes back through after eddy flow tedge 9 connects cone point, to be dissipated uniformly, is passed through
Tubulation attracts after being concentrated by top cone bucket through air-introduced machine A, and the tail gas through dedusting and recuperation of heat is discharged by exhaust pipe 12.
Heat exchanging device shell side outer wall realizes rotational-flow high-efficient heat exchange to high-temperature tail gas rotational flow dust-removing simultaneously, exports head-tank 13
Soft water heating, dedusting tail gas passes back through tubulation once again, and carrying out the recuperation of heat of second step tail makes soft water heat up once again；Head-tank
Soft water enters 6 shell side lower part of tubular heat exchanger by pipeline in 13, with tail gas heat exchange from shell side top by pipeline connect to
Water pump 11, supplies water to boiler.
Boiler blowdown water tangentially enters cyclone dust collectors 7 by sewage pipe 2, and boiler blowdown water is in boiler pressure state
Under, it is appropriate that the superheated water that basicity is excessively high in drum, after merging air-flow enters cyclone dust collectors 7, particularly advantageous sewerage pair is discharged
Grease is rinsed with crock in cyclone dust collectors 7.
Draught fan impeller of the invention is in use, since blade design is at hollow anti-water-drop-shaped, and sharf radial center
Symmetrically, thus when high speed rotation, blade surface has centrifugation self purification under the action of the centrifugal force, makes dust by centrifugation masterpiece
With and can not adhere to, thus will not influence dynamic, the static balancing of impeller, will not more accumulate dust；This blade construction
Technical solution 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 are as follows: when steel plate thickness one
When sample, dish-shaped backboard due to rigidity reinforced, stress dispersion, elastic buffer improve and shape stability also greatly improve, because
And bearing capacity can be enhanced about more than once on the basis of common flat backboard.Since 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 only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.It is any to be familiar with sheet
The technical staff in field, without deviating from the scope of the technical scheme of the present invention, all using the technology contents of the disclosure above
Many possible changes and modifications or equivalent example modified to equivalent change are made to technical solution of the present invention.Therefore, all
It is the content without departing from technical solution of the present invention, technical spirit is made to the above embodiment according to the present invention any simply repairs
Change, equivalent variations and modification, all shall fall within the protection scope of the technical scheme of the invention.
Claims (1)
1. a kind of tail recuperation of heat dedusting integral type coal-burning boiler, including boiler body, boiler exhaust gas pipe, boiler water blow-down pipe, whirlwind
The hot high-efficiency recoverer of dedusting tail and air-introduced machine, it is characterised in that；The hot high-efficiency recoverer of cyclone dust removal tail by tubular heat exchanger and
Cyclone dust collectors are formed by stacking, the tangentially connected cyclone dust collectors of boiler exhaust gas pipe, are arranged at cone bottom by wind stopping device after rotational flow dust-removing
Dust out, tail gas connect cone by eddy flow tedge, and tubulation is passed through after being uniformly dispersed, and pass through air inducing after being concentrated by top cone bucket
Machine is discharged by exhaust pipe；Head-tank connects tubular heat exchanger shell side lower part, and tubular heat exchanger shell side top is through boiler feed pump
Connect boiler body；The air-introduced machine includes draught fan impeller and casing, and draught fan impeller includes impeller backboard, impeller panel and leaf
Piece, blade arrangement radial, centrosymmetric hollow anti-water-drop-shaped at impeller shaft, impeller backboard is dish；Hollow anti-water-drop-shaped leaf
Piece connection impeller panel is simultaneously welded to form impeller bodies with dish-shaped impeller backboard；Impeller panel is equipped with air inlet, dish-shaped impeller back
Plate is fixed by rivet and connection shaft seat, axle bed are cooperatively connected by axis hole and fan shaft；Casing is equipped with air inlet and goes out
Air port, cabinet form contour line are involutes, and the round heart of involute is overlapped with blower axle center, and involute is on the inside of shell air outlet
Start, scribing line radius is gradually increased with involute circle, is terminated to shell air outlet outside, shell air outlet width is equal to involute
Circumference；Shell air inlet is equipped with cover board, also has air inlet convenient for connecting pipe on cover board, and axle center and impeller axle center are overlapped；
The tangentially connected cyclone dust collectors of boiler water blow-down pipe realize the cleaning to grease in cyclone dust collectors and crock；It is described hollow
Anti- water-drop-shaped blade is combined by the welding of two panels Curved surface metal, and has symmetrical streamline shape；The casing is fixed on base
On；The shell air inlet cover board is bolted to connection casing, and can dismantle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510496328.1A CN105003927B (en) | 2015-08-14 | 2015-08-14 | A kind of tail recuperation of heat dedusting integral type coal-burning boiler |
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| CN201510496328.1A CN105003927B (en) | 2015-08-14 | 2015-08-14 | A kind of tail recuperation of heat dedusting integral type coal-burning boiler |
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| CN105003927A CN105003927A (en) | 2015-10-28 |
| CN105003927B true CN105003927B (en) | 2018-12-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105716271A (en) * | 2016-02-22 | 2016-06-29 | 吉首大学 | Exhaust heat recovery and dust removal integrated biomass boiler heating system |
| CN105716270A (en) * | 2016-02-22 | 2016-06-29 | 吉首大学 | Tail heat recovery and dust removal integrated quick-release biomass boiler |
| CN105650850A (en) * | 2016-02-22 | 2016-06-08 | 吉首大学 | Heat supply system of biomass boiler |
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| EP0262274A1 (en) * | 1986-09-22 | 1988-04-06 | Emile Percevaut | Recuperator of heat from flue gases from different furnaces capable of cleaning these gases |
| CN201730838U (en) * | 2010-07-02 | 2011-02-02 | 西安银星节能科技有限公司 | Feeding fan used for conveying biofuels |
| CN102022376A (en) * | 2010-11-05 | 2011-04-20 | 聂伟 | Suction fan impeller of mower |
| CN202903702U (en) * | 2012-09-25 | 2013-04-24 | 中国东方电气集团有限公司 | Contamination characteristic testing device for segmental temperature control coal burning boiler |
| CN203067343U (en) * | 2012-12-16 | 2013-07-17 | 登封市嵩基水泥有限公司 | Dust-proof centrifugal fan vane wheel |
| CN204829971U (en) * | 2015-08-14 | 2015-12-02 | 吉首大学 | Tail heat recovery dust removal integral type coal fired boiler |
-
2015
- 2015-08-14 CN CN201510496328.1A patent/CN105003927B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0262274A1 (en) * | 1986-09-22 | 1988-04-06 | Emile Percevaut | Recuperator of heat from flue gases from different furnaces capable of cleaning these gases |
| CN201730838U (en) * | 2010-07-02 | 2011-02-02 | 西安银星节能科技有限公司 | Feeding fan used for conveying biofuels |
| CN102022376A (en) * | 2010-11-05 | 2011-04-20 | 聂伟 | Suction fan impeller of mower |
| CN202903702U (en) * | 2012-09-25 | 2013-04-24 | 中国东方电气集团有限公司 | Contamination characteristic testing device for segmental temperature control coal burning boiler |
| CN203067343U (en) * | 2012-12-16 | 2013-07-17 | 登封市嵩基水泥有限公司 | Dust-proof centrifugal fan vane wheel |
| CN204829971U (en) * | 2015-08-14 | 2015-12-02 | 吉首大学 | Tail heat recovery dust removal integral type coal fired boiler |
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