CN105180188A - Tail heat recovery and dust removal integrated coal-fired boiler - Google Patents
Tail heat recovery and dust removal integrated coal-fired boiler Download PDFInfo
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- CN105180188A CN105180188A CN201510496407.2A CN201510496407A CN105180188A CN 105180188 A CN105180188 A CN 105180188A CN 201510496407 A CN201510496407 A CN 201510496407A CN 105180188 A CN105180188 A CN 105180188A
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- impeller
- boiler
- tail
- cyclone dust
- draught fan
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Abstract
The invention discloses a tail heat recovery and dust removal integrated coal-fired boiler. A tail gas pipe of the boiler is connected with a cyclone dust collector in the tangential direction. Dust is discharged out through a closed-air aspirator at the conical bottom after the cyclone dust collector conducts cyclone dust collection. Tail gas passes through a cyclone ascending tube and a connection cone, is dispersed evenly, passes through row tubes and is centralized in an upper conical hopper and then discharged out of an exhaust pipe through a draught fan. An impeller of the draught fan is provided with blades of a hollow inverted-water-drop-shaped structure. The contour line of the draught fan is an involute. According to the tail heat recovery and dust removal integrated coal-fired boiler, boiler tail heat recovery and dust collection are creatively integrated, , and a cyclone dust collection and tail heat high-efficiency recoverer is designed, so tail heat recovery and dust collection can be completed in one step, equipment investment is reduced, and the working efficiency is improved; since the blades are of the hollow inverted-water-drop-shaped structure, dust on the impeller of the draught fan is cleaned away in real time, the strength of the impeller of the draught fan is improved, stability is enhanced, safety accidents caused by dust accumulation are effectively eradicated, and the application prospects are wide.
Description
Technical field
The present invention relates to a kind of coal-burning boiler, the concrete blower fan that guides can not the tail recuperation of heat dedusting integral type coal-burning boiler of laying dust.
Background technology
Boiler uses very general thermodynamic apparatus, coal-burning boiler due to technology maturation, fuel cost low, one of main preferred unit remaining heat supply, but coal-burning boiler is owing to carrying flue dust, sulfur dioxide and tail heat secretly in emission, so need operation tail gas being carried out to the aspects such as tail recuperation of heat, dedusting, cleaning harmful gas.
Air-introduced machine is the key equipment that coal-burning boiler realizes tail recuperation of heat and dedusting; draught fan for boiler is mostly centrifugal blower; air-introduced machine continuous, stable, reliably working is very crucial; the occasion used due to coal-burning boiler all contains certain dust mostly; during air-introduced machine work; air-flow by during the draught fan impeller of High Rotation Speed due to centrifugation, dust granule can depart from 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 there is micro-dust to exist in air-flow, all more dust can be accumulated after working long hours, thus change the balance of draught fan impeller rotation, if draught fan impeller does not have self purification not clear up in time to dust yet, will cumulative and progressively change draught fan impeller Static and dynamic balance, thus produce vibration.Have the dust that part hardens to be come off by vibration once run into, will balance away from the dynamic rotary of air-introduced machine immediately, then produce judder, this may cause serious personnel and device security accident.
Therefore, if a kind of coal-burning boiler draught fan impeller can be designed, Automatic clearance can be carried out and just do not worry causing dust accumulation, for keeping the reliable and stable work of air-introduced machine and stopping the meaning that security incident all has particular importance.
On the other hand, often containing a large amount of heat energy and dust in the tail gas that coal-burning boiler is discharged, if can effectively reclaim and dedusting, for the efficiency improving boiler, and it is all significant to realize energy-saving and emission-reduction.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art exactly, provides a kind of simple and practical, the tail recuperation of heat dedusting integral type coal-burning boiler of dust on energy Automatic clearance draught fan impeller.
For overcoming the deficiencies in the prior art, the present invention takes following technical scheme:
A kind of tail recuperation of heat dedusting integral type coal-burning boiler, comprises boiler body, boiler exhaust gas pipe, boiler water blow-down pipe, the hot high-efficiency recoverer of cyclone dust removal tail and air-introduced machine, it is characterized in that; The hot high-efficiency recoverer of cyclone dust removal tail is formed by stacking by tubular heat exchanger and cyclone dust collectors, boiler exhaust gas pipe tangentially connects cyclone dust collectors, dust is discharged at the cone end by wind stopping device after rotational flow dust-removing, tail gas connects cone by eddy flow tedge, through tubulation after being uniformly dispersed, being bored after bucket is concentrated by top and discharged by blast pipe by air-introduced machine; Head-tank connecting column heat exchange of heat pipe shell side bottom, tubular heat exchanger shell side top connects boiler body through boiler feed pump; Described air-introduced machine comprises draught fan impeller and casing, and draught fan impeller comprises impeller backboard, impeller panel and blade, and blade arrangement becomes impeller Axial and radial, the anti-water-drop-shaped of centrosymmetric hollow; The anti-water-drop-shaped blade of hollow connects impeller panel and is welded to form impeller bodies with impeller backboard; Impeller panel is provided with air inlet, impeller backboard by the fixing also connection shaft seat of rivet, and axle bed is connected by axis hole and fan shaft; Casing is provided with air inlet and air outlet, cabinet form outline line is involute, the round heart of involute and blower fan axis coinciding, involute is from inside shell air outlet, line radius strengthens gradually with involute circle, terminate outside shell air outlet, shell air outlet width equals involute circumference; Shell air inlet is provided with cover plate, cover plate also has air inlet be convenient to connecting pipe, and axle center and impeller axis coinciding.
Described boiler water blow-down pipe tangentially connects cyclone dust collectors, realizes the cleaning to grease in cyclone dust collectors and crock.
The anti-water-drop-shaped blade of described hollow is synthesized by two panels Curved surface metal soldering group, and has symmetrical streamline profile.
Described casing is fixed on support.Casing plays sealing process, air inlet air inlet obtains kinetic energy by vane rotary, and carries out power conversion in casing, and a part of kinetic energy is converted to the static energy of gas, make output gas flow have speed dynamic head like this and also have hydrostatic head, both sums are exactly blower press.
Shell air inlet can connect airduct according to need, air inlet cover plate is detachable, be bolted to connection casing, the scroll casing shape of casing is gradually opened profile and is met the needs that Fan casing is airtight, conveying gas realizes energy efficient conversion simultaneously, makes output gas flow can reach required flow and total head.
Described shell air inlet cover plate is bolted to connection casing, and can dismantle.
Coal-burning boiler is all operated in micro-vacuum state usually, so all need to configure air-introduced machine, the continous-stable work of air-introduced machine exports discharge for the pressure of tail gas, and tail recuperation of heat and udst separation all particular importances.
Boiler gets rid of combustion tail gas by offgas duct, high-temperature tail gas contains a large amount of heat energy, utilize the hot high-efficiency recoverer of cyclone dust removal tail to carry out dedusting and recuperation of heat, tail gas tangentially enters cyclone dust collectors through entrance, in the dedusting of cyclone dust collectors inward eddy, dust is discharged by wind stopping device at the cone end, tail gas passes back through eddy flow tedge connection cone and divides rear evenly loose, through tubulation, after concentrated by top cone bucket, attract through air-introduced machine, discharge the tail gas through dedusting and recuperation of heat by blast pipe.
High-temperature tail gas rotational flow dust-removing simultaneously heat exchanger shell side outer wall realizes rotational-flow high-efficient heat exchange, and the soft water that head-tank is exported heats up, and dedusting tail gas passes back through tubulation once again, carries out the recuperation of heat of second step tail and soft water is heated up once again; In head-tank, soft water enters tubular heat exchanger shell side bottom by Cemented filling, is connected feed pump, supplies water to boiler with tail gas heat exchange from shell side top by pipeline.
Boiler blowdown water tangentially enters cyclone dust collectors by blow-off pipe, boiler blowdown water is under boiler pressure state, the superheated water that in appropriate discharge drum, basicity is too high, after merging air-flow enters cyclone dust collectors, advantageous particularly sewer rinses grease in cyclone dust collectors and crock.
When draught fan impeller of the present invention uses, because blade design becomes the anti-water-drop-shaped of hollow, and sharf radial center is symmetrical, thus during High Rotation Speed, blade surface has centrifugal self purification under centrifugal action, make dust be subject to centrifugal action and cannot adhere to, dynamic, the static balancing of impeller would not be affected like this, more can not accumulate dust; The technical scheme of this blade construction, the wide impeller air-introduced machine being particularly suitable for delivery air amount large adopts.
Compared with prior art, beneficial effect of the present invention is also:
The recuperation of heat of boiler tail and dedusting are carried out creativeness integrated, design the hot high-efficiency recoverer of cyclone dust removal tail, tail recuperation of heat and dedusting one step are completed, reduces equipment investment and also improve operating efficiency; Risen by the mobility of tail gas rotational outside heat exchanger shell pass and the tail gas in heat exchanger tube, carry out two step high efficient heat exchangings and tail recuperation of heat, ultrahigh in efficiency, tail heat utilization heat is not abundant; Boiler blowdown water is for removing grease in cyclone separator, crock, especially efficiently convenient.
Blade design becomes the anti-water-drop-shaped of hollow, and sharf radial center is symmetrical, and the blower fan backboard making it connect and the anti-relative torsion of panel, to extrude rigidity extremely strong, can stop to use the fan blade caused to connect the fracture of backboard root for a long time.
Blade design becomes the anti-water-drop-shaped of hollow, and sharf radial center is symmetrical, even also can obtain higher intensity with thinner board making draught fan impeller, ensures to stablize, reliably use, can save material, be convenient to make, be also conducive to light and handyization of equipment.
The anti-water-drop-shaped blade of hollow has streamline profile, and blade air steadily skimming over property is fabulous, so fan operation noise is little especially, improves working environment.
Vanes on Induced Draft Fan ingehious design is become the anti-water-drop-shaped of hollow by the present invention, and the shape of sharf radial center symmetry, achieve the real-time cleaning of dust on blade, extend the security incident also effectively stopping dust accumulation initiation service life of equipment, have a extensive future.
Accompanying drawing explanation
Fig. 1 is 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.
In figure, each label represents:
A, air-introduced machine; 1, coal-burning boiler main body; 2, boiler water blow-down pipe; 3, offgas duct; 4, the hot high-efficiency recoverer of cyclone dust removal tail; 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, blast pipe; 13, head-tank; 31, anti-water-drop-shaped blade; 32, impeller cylindrical; 33, impeller air inlet; 34, axle bed; 35, rivet; 36, axis hole; 37, impeller backboard; 38, impeller panel; 41, impeller; 42, shell air inlet; 43, involute circle; 44, support; 45, casing; 46, shell air inlet cover plate; 47, shell air outlet; B, shell air outlet width.
Detailed description of the invention
Now by reference to the accompanying drawings, the present invention is illustrated further.
As Fig. 1, Fig. 2, the recuperation of heat of tail shown in Fig. 3 and Fig. 4 dedusting integral type coal-burning boiler, comprise boiler body 1, boiler exhaust gas pipe 3, boiler water blow-down pipe 2, the hot high-efficiency recoverer 4 of cyclone dust removal tail and air-introduced machine A, the hot high-efficiency recoverer 4 of cyclone dust removal tail is formed by stacking by tubular heat exchanger 6 and cyclone dust collectors 7, boiler exhaust gas pipe 3 tangentially connects cyclone dust collectors 7, dust is discharged at the cone end by wind stopping device 10 after rotational flow dust-removing, tail gas connects cone by eddy flow tedge 9, through tubulation after being uniformly dispersed, bored after bucket is concentrated by top and discharged by blast pipe 12 by air-introduced machine A, head-tank 13 connecting column heat exchange of heat pipe 6 shell side bottom, tubular heat exchanger 6 shell side top connects boiler body 1 through boiler feed pump 11, described air-introduced machine comprises draught fan impeller 41 and casing 45, and draught fan impeller 41 comprises impeller backboard 37, impeller panel 38 and blade 31, and blade 31 is arranged to impeller Axial and radial, the anti-water-drop-shaped of centrosymmetric hollow, the anti-water-drop-shaped blade 31 of hollow connects impeller panel 38 and is welded to form impeller bodies with impeller backboard 37, impeller panel 38 is provided with air inlet 33, impeller backboard 37 by the fixing also connection shaft seat 34 of rivet 35, and axle bed 34 is connected by axis hole 36 and fan shaft, casing 45 is provided with air inlet 42 and air outlet 47, cabinet form outline line is involute, the round heart of involute and blower fan axis coinciding, involute is from inside shell air outlet 47, line radius strengthens gradually with involute circle, terminate outside shell air outlet 47, shell air outlet width B equals involute circle 43 girths, shell air inlet 42 is provided with cover plate 46, cover plate also has air inlet be convenient to connecting pipe, and axle center and impeller axis coinciding.
Described boiler water blow-down pipe 2 tangentially connects cyclone dust collectors 7, realizes the cleaning to grease in cyclone dust collectors and crock.
The anti-water-drop-shaped blade 31 of described hollow is synthesized by two panels Curved surface metal soldering group, and has symmetrical streamline profile.
Described casing 45 is fixed on support 44.Casing 45 plays sealing process, air inlet 42 air inlet is rotated by impeller 41 and obtains kinetic energy, and carries out power conversion in casing 45, and a part of kinetic energy is converted to the static energy of gas, make output gas flow have speed dynamic head like this and also have hydrostatic head, both sums are exactly blower press.
Shell air inlet 42 can connect airduct according to need, air inlet cover plate 46 is detachable, be bolted to connection casing 45, the scroll casing shape of casing 45 is gradually opened profile and is met the needs that Fan casing is airtight, conveying gas realizes energy efficient conversion simultaneously, makes output gas flow can reach required flow and total head.
Described shell air inlet cover plate 46 is bolted to connection casing 15, and can dismantle.
Coal-burning boiler is all operated in micro-vacuum state usually, so all need configuration air-introduced machine A, the continous-stable work of air-introduced machine A exports discharge for the pressure of tail gas, and tail recuperation of heat and udst separation all particular importances.
Boiler gets rid of combustion tail gas by offgas duct 3, high-temperature tail gas contains a large amount of heat energy, utilize the hot high-efficiency recoverer 4 of cyclone dust removal tail to carry out dedusting and recuperation of heat, tail gas tangentially enters cyclone dust collectors 7 through entrance 5, in the dedusting of cyclone dust collectors 7 inward eddy, dust is discharged by wind stopping device 10 at the cone end, tail gas pass back through eddy flow tedge 9 connect cone divide rear loose evenly, through tubulation, bore after bucket concentrates by top, attract through air-introduced machine A, discharge the tail gas through dedusting and recuperation of heat by blast pipe 12.
High-temperature tail gas rotational flow dust-removing simultaneously heat exchanger shell side outer wall realizes rotational-flow high-efficient heat exchange, and the soft water that head-tank 13 is exported heats up, and dedusting tail gas passes back through tubulation once again, carries out the recuperation of heat of second step tail and soft water is heated up once again; In head-tank 13, soft water enters tubular heat exchanger 6 shell side bottom by Cemented filling, is connected feed pump 11, supplies water to boiler with tail gas heat exchange from shell side top by pipeline.
Boiler blowdown water tangentially enters cyclone dust collectors 7 by blow-off pipe 2, boiler blowdown water is under boiler pressure state, the superheated water that in appropriate discharge drum, basicity is too high, after merging air-flow enters cyclone dust collectors 7, advantageous particularly sewer rinses grease and crock in cyclone dust collectors 7.
When draught fan impeller of the present invention uses, because blade design becomes the anti-water-drop-shaped of hollow, and sharf radial center is symmetrical, thus during High Rotation Speed, blade surface has centrifugal self purification under centrifugal action, make dust be subject to centrifugal action and cannot adhere to, dynamic, the static balancing of impeller would not be affected like this, more can not accumulate dust; The technical scheme of this blade construction, the wide impeller air-introduced machine being particularly suitable for delivery air amount large adopts.
Above-mentioned just preferred embodiment of the present invention, not does any pro forma restriction to the present invention.Any those of ordinary skill in the art, when not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or being revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.
Claims (5)
1. a tail recuperation of heat dedusting integral type coal-burning boiler, comprises boiler body, boiler exhaust gas pipe, boiler water blow-down pipe, the hot high-efficiency recoverer of cyclone dust removal tail and air-introduced machine, it is characterized in that; The hot high-efficiency recoverer of cyclone dust removal tail is formed by stacking by tubular heat exchanger and cyclone dust collectors, boiler exhaust gas pipe tangentially connects cyclone dust collectors, dust is discharged at the cone end by wind stopping device after rotational flow dust-removing, tail gas connects cone by eddy flow tedge, through tubulation after being uniformly dispersed, being bored after bucket is concentrated by top and discharged by blast pipe by air-introduced machine; Head-tank connecting column heat exchange of heat pipe shell side bottom, tubular heat exchanger shell side top connects boiler body through boiler feed pump; Described air-introduced machine comprises draught fan impeller and casing, and draught fan impeller comprises impeller backboard, impeller panel and blade, and blade arrangement becomes impeller Axial and radial, the anti-water-drop-shaped of centrosymmetric hollow; The anti-water-drop-shaped blade of hollow connects impeller panel and is welded to form impeller bodies with impeller backboard; Impeller panel is provided with air inlet, impeller backboard by the fixing also connection shaft seat of rivet, and axle bed is connected by axis hole and fan shaft; Casing is provided with air inlet and air outlet, cabinet form outline line is involute, the round heart of involute and blower fan axis coinciding, involute is from inside shell air outlet, line radius strengthens gradually with involute circle, terminate outside shell air outlet, shell air outlet width equals involute circumference; Shell air inlet is provided with cover plate, cover plate also has air inlet be convenient to connecting pipe, and axle center and impeller axis coinciding.
2. tail recuperation of heat dedusting integral type coal-burning boiler according to claim 1, is characterized in that: described boiler water blow-down pipe tangentially connects cyclone dust collectors, realizes the cleaning to grease in cyclone dust collectors and crock.
3. tail recuperation of heat dedusting integral type coal-burning boiler according to claim 1 or 2, is characterized in that: the anti-water-drop-shaped blade of described hollow is synthesized by two panels Curved surface metal soldering group, and has symmetrical streamline profile.
4. tail recuperation of heat dedusting integral type coal-burning boiler according to claim 1 or 2, is characterized in that: described casing is fixed on support.
5. tail recuperation of heat dedusting integral type coal-burning boiler according to claim 1 or 2, is characterized in that: described shell air inlet cover plate is bolted to connection casing, and can dismantle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510496407.2A CN105180188A (en) | 2015-08-14 | 2015-08-14 | Tail heat recovery and dust removal integrated coal-fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510496407.2A CN105180188A (en) | 2015-08-14 | 2015-08-14 | Tail heat recovery and dust removal integrated coal-fired boiler |
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| CN105180188A true CN105180188A (en) | 2015-12-23 |
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| CN201510496407.2A Pending CN105180188A (en) | 2015-08-14 | 2015-08-14 | Tail heat recovery and dust removal integrated coal-fired boiler |
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Citations (9)
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|---|---|---|---|---|
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| US4412783A (en) * | 1981-10-08 | 1983-11-01 | Thermo King Corporation | Centrifugal fan wheel with changeable pitch blades |
| EP0262274A1 (en) * | 1986-09-22 | 1988-04-06 | Emile Percevaut | Recuperator of heat from flue gases from different furnaces capable of cleaning these gases |
| CN2708217Y (en) * | 2004-05-31 | 2005-07-06 | 孙孝宽 | Double-flow positive and negative purging type heat exchanger |
| CN101920228A (en) * | 2010-09-10 | 2010-12-22 | 昆明电研新能源科技开发有限公司 | Dust collecting and air cooling heat exchanger |
| 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 |
| CN204853525U (en) * | 2015-08-14 | 2015-12-09 | 吉首大学 | Tail heat recovery dust removal integral type coal fired boiler |
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2015
- 2015-08-14 CN CN201510496407.2A patent/CN105180188A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR551607A (en) * | 1921-08-30 | 1923-04-10 | Anciens Etablissements Grouvel | Blade for centrifugal fan impeller |
| US4412783A (en) * | 1981-10-08 | 1983-11-01 | Thermo King Corporation | Centrifugal fan wheel with changeable pitch blades |
| EP0262274A1 (en) * | 1986-09-22 | 1988-04-06 | Emile Percevaut | Recuperator of heat from flue gases from different furnaces capable of cleaning these gases |
| CN2708217Y (en) * | 2004-05-31 | 2005-07-06 | 孙孝宽 | Double-flow positive and negative purging type heat exchanger |
| CN101920228A (en) * | 2010-09-10 | 2010-12-22 | 昆明电研新能源科技开发有限公司 | Dust collecting and air cooling heat exchanger |
| 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 |
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Non-Patent Citations (1)
| Title |
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Application publication date: 20151223 |
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