CN104033894B - The CFB Boiler cold squama defeated slag system of bucket type - Google Patents
The CFB Boiler cold squama defeated slag system of bucket type Download PDFInfo
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- CN104033894B CN104033894B CN201410292822.1A CN201410292822A CN104033894B CN 104033894 B CN104033894 B CN 104033894B CN 201410292822 A CN201410292822 A CN 201410292822A CN 104033894 B CN104033894 B CN 104033894B
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Abstract
A kind of CFB Boiler cold squama defeated slag system of bucket type, including air-cooled squama bucket type slag conveyer, it is arranged on the several cooling charging gears above air-cooled squama bucket type slag conveyer horizontal segment, it is arranged on the air cooler of air-cooled squama bucket type slag conveyer horizontal segment end, is arranged on the dry slag bucket below air-cooled squama bucket type slag conveyer oblique ascension section end.The CFB Boiler of the present invention cold squama defeated slag system of bucket type, cools down and is transported in one, and stable and reliable operation, good seal performance, conveying capacity is big, good cooling results.Can be widely applied in the defeated slag system of CFBB.
Description
Technical field
The present invention relates to a kind of CFB Boiler cold squama defeated slag system of bucket type, can be widely applied in the defeated slag system of CFBB.
Background technology
At present, what the defeated slag system of CFBB was taked is all cooling and carries the system being respectively completed, namely first warm sludge is cooled to 100 DEG C or 150 DEG C by about 900 DEG C by application air-water combined slag cooler or rolling-cylinder type slag-cooler, then added bucket elevator by follow-up bucket chain conveyor or embedded scraper transporter and be delivered to the storage of dry slag bucket, regularly transport outward.Often there are various faults in actual moving process in system, has a strong impact on the safe operation of boiler, is one of bottleneck affecting Safety Operation of CFB Boiler.
The defect that existing defeated slag system air-water combined slag cooler exists: in slag cooler, coking situation is serious, after entering slag cooler without clean-burning coal grain with slag charge, due to the instability of fluidized wind, makes fluidisation insufficient, causes coking.The adaptive capacity of coal is poor, when power plant soot source is uncertain, use relatively low calorific value coal kind time or as-fired coal grain when being not reaching to design standard, the adaptability of slag cooler is poor, often has stifled slag phenomenon.When accident occurs in slag cooler, when putting red slag from accident slag tap or disclose Jiao, owing to being in barotropic state in slag cooler, cause on-the-spot dust all over the sky, situation of carrying out production strictly in line with rules and regulations difference.Slag tap and backwind tube temperature is higher, due to the uncertainty of ature of coal, it is difficult to ensure that its tapping temperature, often have red slag phenomenon.Power consumption is bigger.
The defect that existing defeated slag system rolling-cylinder type slag-cooler exists: the barrel slag cooler of simple structure cannot meet requirement of exerting oneself greatly, heat exchange area is inadequate, and tapping temperature is too high.But after increase heat exchange area, cause that lag cooler structure is complicated.Limited by barrel slag cooler in-site installation space and structure, it is desirable to lag cooler completes cold slag task utilizing minimum space.The heat exchange area of monotubular louvered barrel slag cooler can not meet the process requirement of current large-sized unit, the too high phenomenon of deslagging temperature often occurs, has a strong impact on the safe operation of barrel slag cooler and follow-up equipment.Also having at present the various ways barrel slag coolers such as double; two sleeve, multitube, membrane wall subregions, part meets heat transfer requirements, but occurs again while solving heat transfer problem that cylinder leaks, deslagging is smooth, cannot overhaul etc. and be difficult to the disadvantage overcome.
The defect that the follow-up slag-conveying device of existing defeated slag system-bucket chain conveyor exists: the bucket chain conveyor chain of application is leaf chain at present, chain carries roller, chain hopper running relies on roller roll in orbit to be supported, rolling bearing is all placed in the housing of sealing, in housing, Dust Capacity is big, limited by space, the sealing of roller is often inadequate again, often result in bearing bore and enter ash, bearing damage, the faults such as roller does not turn, must shut down and change roller, the consumable accessorys such as bearing, and owing to roller does not turn, it is also comparatively serious to I-shaped derailing abrasion, repair and maintenance amount is big, current more than 300MW unit often needs the using and the reserved to arrange.Bucket chain conveyor is without refrigerating function, and the adaptability of high-temperature ash is poor, easily breaks down.Bucket chain conveyor operation stability is poor, the faults such as hopper deformation often occurs.Bucket chain conveyor hopper is continuous bucket-shaped layout, proceeds in process after slag is cooled down by barrel slag cooler, and spring slag phenomenon is serious, and bucket chain conveyor afterbody cleaning performance is poor, usually occurs that accumulated slag blocks up slag phenomenon, it is necessary to special messenger clears up.
The defect that the follow-up slag-conveying device of existing defeated slag system-embedded scraper transporter exists: chain of en-masse conveyor and scraper plate directly contact with warm sludge, very easily occur that scraper plate deforms, the problems such as chain hardness reduces, quick abrasion.
Summary of the invention
It is an object of the invention to provide a kind of cooling be transported in one, stable and reliable operation, good seal performance, conveying capacity greatly, the CFB Boiler cold squama defeated slag system of bucket type of good cooling results.
In order to achieve the above object, the CFB Boiler of the present invention cold squama defeated slag system of bucket type, including air-cooled squama bucket type slag conveyer, it is arranged on the several cooling charging gears above air-cooled squama bucket type slag conveyer horizontal segment, it is arranged on the air cooler of air-cooled squama bucket type slag conveyer horizontal segment end, is arranged on the dry slag bucket below air-cooled squama bucket type slag conveyer oblique ascension section end；Described cooling charging gear, including housing, it is arranged on the axle envelope seat on housing two ends, it is arranged on the hollow axle with recirculated cooling water in axle envelope seat, it is arranged on the driving wheel on hollow axle periphery, it is positioned at the charging aperture cooling feed blade on hollow axle mounted below, is arranged on the water inlet swivel joint at hollow axle two ends, goes out water swivel, be provided with the cooling water recirculation system of water inlet, outlet.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, described air-cooled squama bucket type slag conveyer, including the closed casing with horizontal segment and oblique ascension section, it is arranged on the squama hopper conveyer belt in casing, be arranged on squama hopper conveyer belt from scraper cleaner, being arranged on the afterbody striker plate in casing, the afterbody being arranged on squama hopper conveyer belt afterbody changed course wheel shaft cleans curved baffle.
nullThe CFB Boiler of the present invention cold squama defeated slag system of bucket type，Its operation principle is: the warm sludge of about 900 DEG C of CFBB slag-drip opening discharge，High temperature ash gate below boiler、High temperature resistant expansion joint，Enter cooling charging gear，Subsequently into air-cooled squama bucket type slag conveyer，Air-cooled squama bucket type slag conveyer shell body end to end and medial side face be provided with air inlet，The aperture of air inlet can be adjusted automatically according to the height of deslagging temperature，Natural wind enters enclosure interior，Through slag blanket, lime-ash is cooled down，High-temperature ash is under the drive of squama hopper conveyer belt，Carry while relying on natural wind to cool down，It is cooled to the lime-ash after 100 DEG C～150 DEG C be fed directly to the storage of dry slag bucket or transport to dry slag bucket through follow-up slag-conveying device，Cooling air is heated to 200 DEG C～300 DEG C，And enter before electric precipitation flue after cooling down via air cooler or be incorporated to boiler secondary air.The cooling water of air cooler takes from the condensation water of low adding system, is back to low adding system again with the water after hot-air heat exchange, squeezes extracted steam from turbine, improves unit efficiency.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, adopt from cleaning squama hopper conveyer belt, it from cleaning works principle is: trickle down the material of device bottom, under scraper cleaner when conveyer device backhaul drives, scraped equipment afterbody, cleaning under curved baffle cooperation at afterbody, material follows scraper cleaner while afterbody rotates changed course, returns in induction system gradually under gravity.Continuous defeated slag, afterbody is from cleaning, it is possible to be prevented effectively from the spring slag phenomenon of traditional chain bucket type slag conveyer.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, integrates conveying and cooling, stable and reliable operation.By cooling down the stirring of feed blade, feed is uniform, and material conveying is smooth and easy, and material will not block, and efficiency is high, and conveying capacity is big, it is possible to meet requirement of exerting oneself greatly.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, adopts natural wind and cooling water-cooled but lime-ash, without leaking, leaking slag phenomenon, good seal performance.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, can a boiler one conveyer, directly enter dry slag bucket arrange, simplify defeated slag system, reduce the fault point.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, cancels conventionally employed barrel slag cooler, adopts air-cooled, the water-cooled associating type of cooling, complete the cooling to slag, good cooling results in the process of conveying.
The air-cooled defeated slag system of squama bucket type of the present invention eliminates the lag cooler that fault rate is high, and equipment had not only completed the conveying of slag but also completed that it is cold, and system is simple, reliable, failure rate is low, repair and maintenance are convenient, is more suitable for current large-sized unit CFBB.
In sum, the CFB Boiler of the present invention cold squama defeated slag system of bucket type, cool down and be transported in one, stable and reliable operation, good seal performance, conveying capacity is big, good cooling results.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the present invention is further described.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the cooling charging gear structural representation in Fig. 1；
Fig. 3 is the A-A sectional view in Fig. 2.
Detailed description of the invention
In Fig. 1～Fig. 3, the CFB Boiler of the present invention cold squama defeated slag system of bucket type, including air-cooled squama bucket type slag conveyer 1, it is arranged on the several cooling charging gears 2 above air-cooled squama bucket type slag conveyer horizontal segment, it is arranged on the air cooler 3 of air-cooled squama bucket type slag conveyer horizontal segment end, is arranged on the dry slag bucket 4 below air-cooled squama bucket type slag conveyer oblique ascension section end；Described cooling charging gear, including housing 10, it is arranged on the axle envelope seat 11 on housing two ends, it is arranged on the hollow axle 12 with recirculated cooling water in axle envelope seat, it is arranged on the driving wheel 13 on hollow axle periphery, it is positioned at the charging aperture cooling feed blade 14 on hollow axle mounted below, is arranged on the water inlet swivel joint 15 at hollow axle two ends, goes out water swivel 16, be provided with the cooling water recirculation system 17 of water inlet, outlet.
The CFB Boiler of the present invention cold squama defeated slag system of bucket type, described air-cooled squama bucket type slag conveyer, including the closed casing 5 with horizontal segment and oblique ascension section, it is arranged on the squama hopper conveyer belt 6 in casing, be arranged on squama hopper conveyer belt from scraper cleaner 7, being arranged on the afterbody striker plate 8 in casing, the afterbody being arranged on squama hopper conveyer belt afterbody changed course wheel shaft cleans curved baffle 9.
Additionally, in figure, cooling airflow, to a, slag b, cooling water inlet c, coolant outlet d, closes cavity inside cooling water e, charging aperture f, discharging opening g, blade rotation direction h.
Claims (2)
1. the CFB Boiler cold squama defeated slag system of bucket type, it is characterized in that, including air-cooled squama bucket type slag conveyer, it is arranged on the several cooling charging gears above air-cooled squama bucket type slag conveyer horizontal segment, it is arranged on the air cooler of air-cooled squama bucket type slag conveyer horizontal segment end, is arranged on the dry slag bucket below air-cooled squama bucket type slag conveyer oblique ascension section end；Described cooling charging gear, including housing, it is arranged on the axle envelope seat on housing two ends, it is arranged on the hollow axle with recirculated cooling water in axle envelope seat, it is arranged on the driving wheel on hollow axle periphery, it is positioned at the charging aperture cooling feed blade on hollow axle mounted below, is arranged on the water inlet swivel joint at hollow axle two ends, goes out water swivel, be provided with the cooling water recirculation system of water inlet, outlet.
2. the defeated slag system of CFB Boiler according to claim 1 cold squama bucket type, it is characterized in that, described air-cooled squama bucket type slag conveyer, including the closed casing with horizontal segment and oblique ascension section, it is arranged on the squama hopper conveyer belt in casing, be arranged on squama hopper conveyer belt from scraper cleaner, be arranged on the afterbody striker plate in casing, be arranged on squama hopper conveyer belt afterbody changed course wheel shaft on afterbody clean curved baffle.
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| CN201410292822.1A CN104033894B (en) | 2014-06-27 | 2014-06-27 | The CFB Boiler cold squama defeated slag system of bucket type |
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| CN104033894B true CN104033894B (en) | 2016-07-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310010B (en) * | 2014-09-30 | 2016-02-10 | 四川德阳市年丰食品有限公司 | Wind-cooling type goes out dregs of rice scrapper conveyor assembly |
| CN104276388B (en) * | 2014-09-30 | 2016-03-23 | 四川德阳市年丰食品有限公司 | A kind of go out the air inlet adjustment equipment of dregs of rice scrapper conveyor |
| CN104289271A (en) * | 2014-10-16 | 2015-01-21 | 栾桂霞 | Compounding system for processing traditional Chinese medicines |
| CN105783007B (en) * | 2016-05-13 | 2017-12-19 | 青岛达能环保设备股份有限公司 | The dry slag induction system of squama bucket type |
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| CN203927896U (en) * | 2014-06-27 | 2014-11-05 | 青岛达能环保设备股份有限公司 | The defeated slag device of the cold squama bucket type of CFB Boiler |
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Patent Citations (9)
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| EP0972988A1 (en) * | 1998-07-14 | 2000-01-19 | Von Roll Umwelttechnik AG | Method and apparatus for extracting water from combustion residues mechanically discharged from a wet slag remover |
| CN2409418Y (en) * | 1999-11-01 | 2000-12-06 | 龚辉勤 | Water cooled, air and water cooled vibration slag cooler |
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