CN201289268Y - Carbon white drying system using fire coal circulating fluid bed hot-air stove - Google Patents

Carbon white drying system using fire coal circulating fluid bed hot-air stove Download PDF

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Publication number
CN201289268Y
CN201289268Y CNU2008201587963U CN200820158796U CN201289268Y CN 201289268 Y CN201289268 Y CN 201289268Y CN U2008201587963 U CNU2008201587963 U CN U2008201587963U CN 200820158796 U CN200820158796 U CN 200820158796U CN 201289268 Y CN201289268 Y CN 201289268Y
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air
hot
heat exchanger
blast
heat
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CNU2008201587963U
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周敏
唐志凡
杨昆
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ZHUZHOU XINGLONG CHEMICAL INDUSTRIAL Co Ltd
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ZHUZHOU XINGLONG CHEMICAL INDUSTRIAL Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract

The utility model relates to a silica drying system used for a coal-burning circulating fluid bed hot-blast furnace. The silica drying system comprises a circulating fluid bed hot-blast furnace system for steam cogeneration during the process of arranging the heat exchange surface in the furnace for controlling the combustion temperature; a smoke backflow system capable of adjusting the smoke flow capacity of a hot-air heat exchanger and used for recovery of waste heat; and a silica slurry drying system for heat exchange between the clean air and the hot-air heat exchanger and for reutilizing the waste gas heat from the drier. The utility model takes coal as the fuel due to the low cost and wide availability of the coal, reutilizes the heat through a plurality of systems, and has high heat efficiency, low energy consumption, good silica drying effect and long service life of the hot-blast furnace and the heat exchanger.

Description

A kind of white carbon drying system that uses fire coal circulating fluid bed hot-air furnace
Technical field
The utility model relates to a kind of drying system, and particularly a kind of is fuel with the coal, adopts the white carbon drying system of fluid bed heat wind furnace.
Background technology
Traditional white carbon drying process is divided into two kinds basically, a kind of is to be that fuel burns in combustion furnace with clean fuel as oil, gas etc., hot-air after the burning directly enters drier, perhaps directly utilizes Electric heating, and heating white carbon black slurry generates required product.There is the higher shortcoming of fuel cost in this technology, and the oil anxiety is global energy crisis, is unfavorable for energy-conserving and environment-protective.
Another kind of technology is to be fuel with the coal, burns in combustion furnace, carries out exchange heat by heat exchanger and generates clean hot blast, and clean hot blast enters drier heating white carbon black slurry and generates required product.A wind effluxes after by the deduster dedusting.This process fuel cost is lower, but in order to guarantee the normal use of heat exchanger, combustion furnace needs very big coefficient of excess air, could guarantee the requirement of heat exchanger to exhaust gas volumn and flue-gas temperature.Because too high coefficient of excess air causes the combustion furnace thermal efficiency not high.Do not have heat-transfer surface in the stove, temperature height in the stove causes furnace wall and heat exchanger life-span short.As adopt fluid-bed combustion furnace, and then the operability of combustion furnace is also bad, and furnace temperature is wayward.Can not arrange deduster in the stove, can't realize returning grey ciculation fluidized burning, make the unburned carbon in flue dust height, the burnout rate of fuel is low.
Summary of the invention
Technical problem to be solved in the utility model is: overcome the deficiencies in the prior art, and provide a kind of is fuel with the coal, and fuel cost is low, wide material sources, thermal efficiency height, energy consumption is low, the white carbon drying effect is good, the white carbon drying system of hot-blast stove and heat exchanger long service life.
The technical solution adopted in the utility model is: the white carbon drying system of this use fire coal circulating fluid bed hot-air furnace comprises the circulating fluid bed hot-air furnace system of heat-transfer surface control ignition temperature coproduction simultaneously steam in the layout stove; The smoke backflow system that can regulate hot blast heat exchanger flue gas flow and heat recovery; A pure air and the heat exchange of hot blast heat exchanger are also recycled the white carbon slurry drying system of drier tail gas heat quantity.
In the technique scheme, the circulating fluid bed hot-air furnace system, comprise circulating fluid bed hot-air furnace, the U type returns grey device, bellows, the furnace bottom air blast, cold slag machine, ash tube, ventilation terminal, advance coal bunker, the backflow airduct, drum, the burner hearth of circulating fluid bed hot-air furnace is arranged the water heat-transfer surface, furnace outlet is installed the dedusting in stove device, the hot-blast stove back segment is arranged the hot blast heat exchanger, dedusting in stove device bottom connects the U type and returns grey device, the U type returns grey device and is communicated with burner hearth, the furnace bottom air blast passes through bellows, ventilation terminal is air blast in burner hearth, and furnace bottom has ash tube and cold slag machine, and hot-blast stove one side is installed into coal bunker, the backflow airduct is installed on top, and drum is installed at the hot-blast stove top.
In the technique scheme, the smoke backflow system comprises backflow blower fan, smoke induced draught fan, deduster, flying dust storehouse, the exhanst gas outlet of hot blast heat exchanger connects the deduster input, the deduster bottom connects the flying dust storehouse, and the flue gas after the deduster dedusting effluxes by smoke induced draught fan respectively and returns burner hearth by the backflow blower fan.
In the technique scheme, white carbon slurry drying system comprises heat exchange air blast, drying machine, trap, product storehouse, air heat exchanger, the dried air-introduced machine of spray, heat exchange air blast two ends connect air heat exchanger and hot blast heat exchanger respectively, the hot blast heat exchanger other end connects drying machine, drying machine dialogue carbon black slurry carries out heat drying, drying machine output connects trap, the product storehouse is installed in the trap lower end, and trap tail gas is exported by entering atmosphere behind air heat exchanger, the dried air-introduced machine of spray.
In the utility model system, described air blast, backflow blower fan, air-introduced machine, heat exchanger, drier, deduster, flying dust storehouse, product storehouse etc., can be according to required dry production capacity size, buy corresponding approved product from the market, reach the RH type heat exchanger of company of the dry Engineering Co., Ltd of power, the blower fan of Shanghai Jia Ruitong wind devices Co., Ltd etc. as GLZ type drying machine, the Shanghai of adopting the high benefit in Wuxi to reach drying equipment factory.
Outstanding feature of the present utility model and remarkable result:
1, because burner hearth is furnished with heating surface, the air coefficient that can control the afterbody surplus is no more than 1.8 (coefficient of excess air is too high, and then the thermal efficiency reduces).Be furnished with high-temperature separator, unburned carbon in flue dust is in 8%, and overall thermal efficiency can also be protected furnace wall more than 83%.If burner hearth is not arranged heating surface, the air coefficient of portion surplus is no more than more than 2.5, can't set up separator, and unburned carbon in flue dust is more than 20%, and the thermal efficiency is no more than 72%.
2, because set up separator, realize circulating combustion, reduced the flying dust concentration in the flue gas, reduced the particle diameter of flying dust, reduced the wearing and tearing of heat exchanging device, prolonged the life-span of heat exchanger, reduced maintenance cost.
3, adopted the smoke backflow system of heat recovery and sprayed dried tail gas heat quantity recovery system owing to the utility model system, so system high efficiency is energy-conservation, heat energy recycle rate height, energy consumption is low, thermal efficiency height.Again because circulating fluid bed hot-air furnace of the present utility model system arranges deduster in stove; not only protected the hot blast heat exchanger; and the flying dust that separates of dedusting in stove device returns grey device through the U type and sends into the burner hearth burning once more; greatly reduced the phosphorus content of flying dust flue gas; the environmental protection treatment that helps energy-saving and cost-reducing and flue gas; the a plurality of systems of the utility model regulate feedback automatically, and the utility model complete machine performance is further improved.
4, the utility model circulating fluid bed hot-air furnace has been drawn the advantage of hot-blast stove and steam boiler; both shortcomings have been abandoned; as: hot-blast stove heat exchanger is arranged; but there is not the water-cooling wall protection; and existing steam boiler has the water-cooling wall protection; but do not have the hot blast heat exchanger, the utility model structure and performance are better than the two, and multiple functional.
Description of drawings:
Fig. 1 is the utility model system architecture schematic diagram
The accompanying drawing marking explanation:
1---dedusting in stove device 2---the U type returns grey device 3---bellows
4---furnace bottom air blast 5---cold slag machine 6---ash tubes
7---ventilation terminal 8---advances coal bunker 9---water-cooling walls
10---backflow airduct 11---drum 12---hot blast heat exchangers
13---backflow blower fan 14---smoke induced draught fan 15---dedusters
16---flying dust storehouse 17---heat exchange air blast 18---drying machines
19---trap 20---product storehouse 21---air heat exchangers
22---spray dried air-introduced machine
The specific embodiment:
Referring to Fig. 1, the utility model comprises: the circulating fluid bed hot-air furnace system of a layout stove interior heat-transfer surface control ignition temperature coproduction simultaneously steam; The smoke backflow system that can regulate hot blast heat exchanger flue gas flow and heat recovery; A pure air and the heat exchange of hot blast heat exchanger are also recycled the white carbon slurry drying system of drier tail gas heat quantity.
The circulating fluid bed hot-air furnace system, comprise that dedusting in stove device 1, U type return grey device 2, bellows 3, furnace bottom air blast 4, cold slag machine 5, ash tube 6, ventilation terminal 7, advance coal bunker 8, water-cooling wall 9, backflow airduct 10, drum 11, hot blast heat exchanger 12, described circulating fluid bed hot-air furnace designs heat-transfer surface such as water-cooling wall 9 in the suitable stove according to hot blast heat exchanger 12 required exhaust gas volumns, thus control combustion product gases temperature.Described circulating fluid bed hot-air furnace burner hearth is arranged the water heat-transfer surface, and back segment is arranged the hot blast heat exchanger.Byproduct steam when described circulating fluid bed hot-air furnace can be produced hot blast at the same time.The furnace wall of described circulating fluid bed hot-air furnace adopts heavy boiler setting to arrange; burner hearth arranges that heating surface is light pipe water cooling tube and pipe laying; the air coefficient that can control the afterbody surplus is no more than 1.8; avoided pure hot-blast stove furnace wall not have the water screen tube protection simultaneously, the local temperature height causes the defective that the furnace wall life-span is short, maintenance cost is big.Circulating fluid bed hot-air furnace is furnished with dedusting in stove device 1, can carry out gas solid separation, has reduced the flying dust concentration in the flue gas and the particle diameter of flying dust, has reduced the wearing and tearing of heat exchanging device, has prolonged the life-span of heat exchanger, has reduced maintenance cost.The flying dust that separates returns grey device through the U type and sends into the burner hearth circulating combustion, and unburned carbon in flue dust can be controlled in 8%.
The smoke backflow system, comprise backflow blower fan 13, smoke induced draught fan 14, deduster 15, flying dust storehouse 16, after flue gas exchanges by exchanger heat 12, after entering deduster 15 dedustings again, flue dust enters ash dropping hopper 16, and a flue gas part enters atmosphere by smoke induced draught fan 14 after the dedusting, a part by backflow blower fan 13 enter burner hearth in, two layers of loopback flue gas interface loopback burner hearth being provided with of top, be used for regulating heat exchanger input gas temperature and exhaust gas volumn, fume afterheat is reused simultaneously.
Spray is done and the tail gas heat quantity recovery system, comprise heat exchange air blast 17, drying machine 18, trap 19, product storehouse 20, air heat exchanger 21, the dried air-introduced machine 22 of spray, the clean hot blast that comes out from the hot blast heat exchanger, enter drying machine 18 with 500 ℃~550 ℃ left and right sides temperature, collect product by trap 19 and enter product storehouse 20, dried 80~120 ℃ of waste heat tail gas are utilized once more, by the clean cold air of air heat exchanger 21 preheatings, enter the hot blast heat exchanger through heat exchange air blast 17, as the clean wind air intake of hot blast heat exchanger.
Enter fluidized bed combustion in the stove through the qualified coal of crushing and screening from advancing coal bunker 8, the high-temperature flue gas that produces enters convection tube with 900 ℃ from furnace outlet behind pipe laying, furnace heating surface absorbing and cooling temperature, cooling enters dedusting in stove device 1 about 850 ℃, carry out gas solid separation, the flying dust that separates returns grey device 2 through the U type and sends into the burner hearth circulating combustion.Flue gas is by 12 heat exchanges of hot blast heat exchanger, reduce to 150 ℃ after deduster 15 dedustings, flue dust is discharged from the flying dust storehouse, a dedusting flue gas part enters atmosphere, enter atmosphere by smoke induced draught fan 14, a part by backflow blower fan 13 enter burner hearth in, 2 layers of loopback flue gas interface loopback burner hearth being provided with of top, be used for regulating heat exchanger input gas temperature and exhaust gas volumn, guarantee the heat exchanger requirement, fume afterheat is reused simultaneously.
Clean wind is through the air heat exchanger 21 30 ℃ of laggard hot blast heat exchangers 12 that raise, be warmed to 500~550 ℃ with the flue gas heat exchange after, enter drying machine 18, dialogue carbon black slurry carries out heat drying,, dry back product enters trap 19 and collects product storehouse 20 packings.Dry back tail gas and clean cold air carry out effluxing after the heat exchange in air heat exchanger 21.
Embodiment:
With the anthracite is fuel, makes the utility model drying system, is applied to the production of white carbon.Circulating fluid bed hot-air furnace is by 20 in this drying system
Figure Y200820158796D0009151724QIETU
The low speed Combustion technology of circulating fluidized is adopted in steam, the design of 2,050 ten thousand kcal/h hot blast rates, and its subjective basis, structure, combustion apparatus, steelframe, platform staircase, coal supply equipment, slagging-off ash disposal etc. design by the 48t/h boiler substantially.The dedusting in stove device adopts the water collar structure, and its size is pressed the 60t/h calculation Design.Furnace wall adopts heavy boiler setting to arrange, burner hearth arranges that heating surface is light pipe water cooling tube and pipe laying, at tail vertical well location arrangements high-temperature flue gas heat exchanger.Heat exchanger is established smoke backflow system loop back hot-blast stove burner hearth, sprays dried tail gas by air heat exchanger preheating cold air, as the clean wind air intake of heat-exchange system.
Adopt this scheme, with the hot-blast stove drying system of routine relatively, unburned carbon in flue dust is by dropping to less than 7% greater than 25%, excess air coefficient is by dropping to less than 1.6 greater than 2.The thermal efficiency is brought up to about 84% by about 72%, and the thermal efficiency is high more than 11 percentage points, and is energy-conservation 13%, consumes 80,000 tons of calculating of coal per year, year economizes on coal 1.04 ten thousand tons, by 400 yuan of calculating of coal per ton, year saves 4,160,000 yuan.

Claims (4)

1, a kind of white carbon drying system that uses fire coal circulating fluid bed hot-air furnace is characterized in that comprising the circulating fluid bed hot-air furnace system of heat-transfer surface control ignition temperature coproduction simultaneously steam in the layout stove; The smoke backflow system that can regulate hot blast heat exchanger flue gas flow and heat recovery; A pure air and the heat exchange of hot blast heat exchanger are also recycled the white carbon slurry drying system of drier tail gas heat quantity.
2, a kind of white carbon drying system that uses fire coal circulating fluid bed hot-air furnace according to claim 1, it is characterized in that the circulating fluid bed hot-air furnace system, comprise circulating fluid bed hot-air furnace, the ∪ type returns grey device, bellows, the furnace bottom air blast, cold slag machine, ash tube, ventilation terminal, advance coal bunker, the backflow airduct, drum, the burner hearth of circulating fluid bed hot-air furnace is arranged the water heat-transfer surface, furnace outlet is installed the dedusting in stove device, the hot-blast stove back segment is arranged the hot blast heat exchanger, dedusting in stove device bottom connects the ∪ type and returns grey device, the ∪ type returns grey device and is communicated with burner hearth, the furnace bottom air blast passes through bellows, ventilation terminal is air blast in burner hearth, furnace bottom has ash tube and cold slag machine, hot-blast stove one side is installed into coal bunker, the backflow airduct is installed on top, and drum is installed at the hot-blast stove top.
3, a kind of white carbon drying system that uses fire coal circulating fluid bed hot-air furnace according to claim 1, it is characterized in that the smoke backflow system comprises backflow blower fan, smoke induced draught fan, deduster, flying dust storehouse, the exhanst gas outlet of hot blast heat exchanger connects the deduster input, the deduster bottom connects the flying dust storehouse, and the flue gas after the deduster dedusting effluxes by smoke induced draught fan respectively and returns burner hearth by the backflow blower fan.
4, a kind of white carbon drying system that uses fire coal circulating fluid bed hot-air furnace according to claim 1, it is characterized in that white carbon slurry drying system comprises the heat exchange air blast, drying machine, trap, the product storehouse, air heat exchanger, spray dried air-introduced machine, heat exchange air blast two ends connect air heat exchanger and hot blast heat exchanger respectively, the hot blast heat exchanger other end connects drying machine, drying machine dialogue carbon black slurry carries out heat drying, drying machine output connects trap, the product storehouse is installed in the trap lower end, trap tail gas output passing through air heat exchanger, enter atmosphere after spraying dried air-introduced machine.
CNU2008201587963U 2008-10-17 2008-10-17 Carbon white drying system using fire coal circulating fluid bed hot-air stove Expired - Lifetime CN201289268Y (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101503193B (en) * 2008-10-17 2011-09-07 株洲兴隆化工实业有限公司 White carbon black drying system using fire coal circulating fluid bed hot-air furnace
CN105066657A (en) * 2015-07-30 2015-11-18 叶小青 Paper drying energy comprehensive utilization system for steam and hot air combined supply boiler
CN109237869A (en) * 2018-10-31 2019-01-18 无锡恒诚硅业有限公司 A kind of white carbon black drying system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101503193B (en) * 2008-10-17 2011-09-07 株洲兴隆化工实业有限公司 White carbon black drying system using fire coal circulating fluid bed hot-air furnace
CN105066657A (en) * 2015-07-30 2015-11-18 叶小青 Paper drying energy comprehensive utilization system for steam and hot air combined supply boiler
CN109237869A (en) * 2018-10-31 2019-01-18 无锡恒诚硅业有限公司 A kind of white carbon black drying system
CN109237869B (en) * 2018-10-31 2024-02-23 无锡恒诚硅业有限公司 White carbon black drying system

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Granted publication date: 20090812

Effective date of abandoning: 20081017