CN104033894A - Air cooling scale hopper type slag conveying system of circulating fluidized bed boiler - Google Patents
Air cooling scale hopper type slag conveying system of circulating fluidized bed boiler Download PDFInfo
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- CN104033894A CN104033894A CN201410292822.1A CN201410292822A CN104033894A CN 104033894 A CN104033894 A CN 104033894A CN 201410292822 A CN201410292822 A CN 201410292822A CN 104033894 A CN104033894 A CN 104033894A
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Abstract
The invention provides an air cooling scale hopper type slag conveying system of a circulating fluidized bed boiler. The air cooling scale hopper type slag conveying system comprises an air cooling scale hopper type slag conveying machine, a plurality of cooling feeding devices which are mounted above a horizontal section of the air cooling scale hopper type slag conveying machine, an air cooler which is mounted at the tail end of the horizontal section of the air cooling scale hopper type slag conveying machine, and a dry slag hopper which is mounted below the tail end of a hoisting section of the air cooling scale hopper type slag conveying machine. The air cooling scale hopper type slag conveying system of the circulating fluidized bed boiler integrates cooling and conveying, and is stable and reliable to operate, good in sealing performance, great in conveying amount and good in cooling effect. The air cooling scale hopper type slag conveying system can be widely applied to the slag conveying system of the circulating fluidized bed boiler.
Description
Technical field
The present invention relates to the defeated slag system of the cold squama bucket type of a kind of CFB Boiler, can be widely used in the defeated slag system of CFBB.
Background technology
At present, what the defeated slag system of CFBB was taked is all cooling systems that complete respectively with conveying, first apply air-water combined slag cooler or rolling-cylinder type slag-cooler warm sludge is cooled to 100 DEG C or 150 DEG C by 900 DEG C of left and right, then add bucket elevator by follow-up bucket chain conveyor or embedded scraper transporter and be delivered to dry slag bucket and store, regularly outward transport.Often there are various faults in system, have a strong impact on the safe operation of boiler in actual moving process, 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, enters after slag cooler with slag charge without clean-burning coal grain, and unstable due to fluidized wind makes fluidisation insufficient, causes coking.Adaptive capacity to coal is poor, when power plant soot is originated when uncertain, while using compared with low heat value coal or when entering stove coal grain and not reaching design standard, the adaptability of slag cooler is poor, often has stifled slag phenomenon.When accident appears in slag cooler, when putting red slag or disclose Jiao from accident slag tap, due in slag cooler in barotropic state, cause on-the-spot dust all over the sky, the situation of carrying out production strictly in line with rules and regulations is poor.Slag tap higher with backwind tube temperature, due to the uncertainty of ature of coal, be difficult to ensure its tapping temperature, often have red slag phenomenon.Power consumption is larger.
The defect that existing defeated slag system rolling-cylinder type slag-cooler exists: the barrel slag cooler of simple structure cannot meet the requirement of exerting oneself greatly, and heat exchange area is inadequate, and tapping temperature is too high.But after increase heat exchange area, cause cold slag machine complex structure.Be subject to the on-the-spot installing space of barrel slag cooler and structural limitations, require cold slag machine utilizing minimum space to complete cold slag task.The heat exchange area of monotubular louvered barrel slag cooler can not meet the processing requirements of at present large unit, often occurs the too high phenomenon of deslagging temperature, has a strong impact on the safe operation of barrel slag cooler and follow-up equipment.Also have at present the various ways barrel slag coolers such as two sleeves, multitube, membrane wall subregion, part meets heat exchange requirement, but the disadvantage that occurs again in solving heat transfer problem that cylindrical shell leaks, deslagging is smooth, cannot overhaul etc. and be difficult to 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, in chain hopper running, rely on roller to roll and support in orbit, rolling bearing is all placed in the housing of sealing, in housing, Dust Capacity is large, be subject to spatial limitation, the sealing of roller is often inadequate again, often cause bearing bore to 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 because roller does not turn, it is also comparatively serious to I-shaped derailing wearing and tearing, repair and maintenance amount is large, the above unit of 300MW often needs the using and the reserved to arrange at present.Bucket chain conveyor is without refrigerating function, and poor to the adaptability of high-temperature ash, is prone to fault.Bucket chain conveyor operation stability is poor, often occurs the faults such as hopper distortion.Bucket chain conveyor hopper is continuous bucket-shaped layout, after slag is cooling by barrel slag cooler, proceeds in process, and spring slag phenomenon is serious, and bucket chain conveyor afterbody cleaning performance is poor, usually occurs that accumulated slag blocks up slag phenomenon, needs special messenger to clear up.
, very easily there is scraper plate distortion, chain lower hardness, the problems such as quick abrasion in 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.。
Summary of the invention
The object of the present invention is to provide a kind of cooling with carry the defeated slag system of the cold squama bucket type of CFB Boiler large in one, stable and reliable operation, good seal performance, conveying capacity, good cooling results.
In order to achieve the above object, the defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, comprise air-cooled squama bucket type slag conveyer, be arranged on the several cooling charging gear of air-cooled squama bucket type slag conveyer horizontal segment top, be arranged on the aerial cooler of air-cooled squama bucket type slag conveyer horizontal segment end, be arranged on the dry slag bucket of air-cooled squama bucket type slag conveyer oblique ascension section end below.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, said air-cooled squama bucket type slag conveyer, comprise the closed casing with horizontal segment and oblique ascension section, be 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 on casing, be arranged on the afterbody cleaning curved baffle on squama hopper conveyer belt afterbody changed course wheel shaft.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, said cooling charging gear, comprise housing, be arranged on the shaft seal seat on housing two ends, be arranged on the hollow shaft with recirculated cooling water in shaft seal seat, be arranged on the driving wheel on hollow shaft periphery, be positioned at charging aperture below and be arranged on the cooling feed blade in hollow shaft, be arranged on hollow shaft two ends water inlet swivel joint, go out water swivel, be provided with the cooling water recirculation system of water inlet, delivery port.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, its operation principle is: the warm sludge of 900 DEG C of left and right that CFBB slag-drip opening is discharged, through the high temperature ash gate of boiler below, high temperature resistant expansion joint, enter cooling charging gear, then enter air-cooled squama bucket type slag conveyer, air-cooled squama bucket type slag conveyer casing housing end to end and medial side face be provided with air inlet, the aperture of air inlet can regulate automatically according to the height of deslagging temperature, natural wind enters enclosure interior, seeing through slag blanket carries out cooling to lime-ash, high-temperature ash is under the drive of squama hopper conveyer belt, carry while to rely on natural wind to carry out cooling, the lime-ash being cooled to after 100 DEG C～150 DEG C is directly delivered to dry slag bucket storage or is transported to dry slag bucket through follow-up slag-conveying device, cooling air is heated to 200 DEG C～300 DEG C, and after cooling via aerial cooler, enter before electric precipitation flue or be incorporated to boiler secondary air.The cooling water of aerial cooler is taken from the condensate water of low adding system, is back to low adding system with the water after hot-air heat exchange again, squeezes extracted steam from turbine, improves unit efficiency.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, adopt from cleaning squama hopper conveyer belt, it from cleaning works principle is: the material of trickling down device bottom, under scraper cleaner in the time of conveying device backhaul drives, scraped equipment afterbody, under afterbody cleaning curved baffle coordinates, material is followed scraper cleaner when afterbody rotates changed course, returns in induction system gradually under Action of Gravity Field.Continuous defeated slag, afterbody, from cleaning, can effectively be avoided the spring slag phenomenon of traditional chain bucket type slag conveyer.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, collection is carried and is cooled to one, stable and reliable operation.Stir by cooling feed blade, feed is even, and mass transport is smooth and easy, and material can not stop up, and efficiency is high, and conveying capacity is large, can meet the requirement of exerting oneself greatly.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, adopts natural wind and water quench lime-ash, without leaking, leak slag phenomenon, good seal performance.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, can a boiler one conveyer, directly enters dry slag bucket and arranges, simplifies defeated slag system, reduces the fault point.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, cancels the barrel slag cooler that tradition adopts, and adopts air-cooled, the water-cooled associating type of cooling in the process of carrying, and completes cooling to slag, good cooling results.
The defeated slag system of air-cooled squama bucket type of the present invention has been cancelled the high cold slag machine of fault rate, 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 at present large unit CFBB.
In sum, the defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, cooling with carry in one, stable and reliable operation, good seal performance, conveying capacity is large, good cooling results.
Brief description of the drawings is further described the present invention below in conjunction with accompanying drawing and embodiment.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the cooling charging gear structural representation in Fig. 1;
Fig. 3 is the A-A cutaway view in Fig. 2.
Detailed description of the invention is in Fig. 1～Fig. 3, the defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, comprise air-cooled squama bucket type slag conveyer 1, be arranged on the several cooling charging gear 2 of air-cooled squama bucket type slag conveyer horizontal segment top, be arranged on the aerial cooler 3 of air-cooled squama bucket type slag conveyer horizontal segment end, be arranged on the dry slag bucket 4 of air-cooled squama bucket type slag conveyer oblique ascension section end below.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, said air-cooled squama bucket type slag conveyer, comprise the closed casing 5 with horizontal segment and oblique ascension section, be arranged on the squama hopper conveyer belt 6 in casing, be arranged on squama hopper conveyer belt from scraper cleaner 7, be arranged on the afterbody striker plate 8 on casing, be arranged on the afterbody cleaning curved baffle 9 on squama hopper conveyer belt afterbody changed course wheel shaft.
The defeated slag system of the cold squama bucket type of CFB Boiler of the present invention, said cooling charging gear, comprise housing 10, be arranged on the shaft seal seat 11 on housing two ends, be arranged on the hollow shaft with recirculated cooling water 12 in shaft seal seat, be arranged on the driving wheel 13 on hollow shaft periphery, be positioned at charging aperture below and be arranged on the cooling feed blade 14 in hollow shaft, be arranged on hollow shaft two ends water inlet swivel joint 15, go out water swivel 16, be provided with the cooling water recirculation system 17 of water inlet, delivery port.
In addition, in figure, cooling airflow is to a, slag b, cooling water inlet c, coolant outlet d, enclosed cavity internal cooling water e, charging aperture f, discharging opening g, blade rotation direction h.
Claims (3)
1. the defeated slag system of the cold squama bucket type of CFB Boiler, it is characterized in that, comprise air-cooled squama bucket type slag conveyer, be arranged on the several cooling charging gear of air-cooled squama bucket type slag conveyer horizontal segment top, be arranged on the aerial cooler of air-cooled squama bucket type slag conveyer horizontal segment end, be arranged on the dry slag bucket of air-cooled squama bucket type slag conveyer oblique ascension section end below.
2. the defeated slag system of the cold squama bucket type of CFB Boiler according to claim 1, it is characterized in that, said air-cooled squama bucket type slag conveyer, comprise the closed casing with horizontal segment and oblique ascension section, be 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 on casing, be arranged on the afterbody cleaning curved baffle on squama hopper conveyer belt afterbody changed course wheel shaft.
3. the defeated slag system of the cold squama bucket type of CFB Boiler according to claim 1, it is characterized in that, said cooling charging gear, comprise housing, be arranged on the shaft seal seat on housing two ends, be arranged on the hollow shaft with recirculated cooling water in shaft seal seat, be arranged on the driving wheel on hollow shaft periphery, be positioned at charging aperture below and be arranged on the cooling feed blade in hollow shaft, be arranged on hollow shaft two ends water inlet swivel joint, go out water swivel, be provided with the cooling water recirculation system of water inlet, delivery port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN104033894A true CN104033894A (en) | 2014-09-10 |
| CN104033894B CN104033894B (en) | 2016-07-13 |
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Cited By (4)
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|---|---|---|---|---|
| CN104276388A (en) * | 2014-09-30 | 2015-01-14 | 四川德阳市年丰食品有限公司 | Air incoming adjusting device of meal-discharging scraping machine |
| CN104289271A (en) * | 2014-10-16 | 2015-01-21 | 栾桂霞 | Compounding system for processing traditional Chinese medicines |
| CN104310010A (en) * | 2014-09-30 | 2015-01-28 | 四川德阳市年丰食品有限公司 | Air-cool type meal discharge scraper machine assembly |
| CN105783007A (en) * | 2016-05-13 | 2016-07-20 | 青岛达能环保设备股份有限公司 | Scale bucket type dry slag conveying system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276388A (en) * | 2014-09-30 | 2015-01-14 | 四川德阳市年丰食品有限公司 | Air incoming adjusting device of meal-discharging scraping machine |
| CN104310010A (en) * | 2014-09-30 | 2015-01-28 | 四川德阳市年丰食品有限公司 | Air-cool type meal discharge scraper machine assembly |
| 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 |
| CN105783007A (en) * | 2016-05-13 | 2016-07-20 | 青岛达能环保设备股份有限公司 | Scale bucket type dry slag conveying system |
| 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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