CN202868672U - Coal gangue fluidized slow-release combustion calcining furnace - Google Patents
Coal gangue fluidized slow-release combustion calcining furnace Download PDFInfo
- Publication number
- CN202868672U CN202868672U CN2012205402572U CN201220540257U CN202868672U CN 202868672 U CN202868672 U CN 202868672U CN 2012205402572 U CN2012205402572 U CN 2012205402572U CN 201220540257 U CN201220540257 U CN 201220540257U CN 202868672 U CN202868672 U CN 202868672U
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- fluidized bed
- bed body
- calcining
- gangue
- fluidized
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The utility model provides a coal gangue fluidized slow-release combustion calcining furnace, comprising a furnace body (1), wherein a heating sleeve (2) is arranged in the furnace body; the lower part of the heating sleeve is provided with a high-temperature gas inlet (4), and the upper part of the heating sleeve is provided with a waste gas outlet (5); a big-end-up fluidized bed body (3) is arranged in the heating sleeve; the upper part of the fluidized bed body is provided with a charging hole (10) and a high-temperature smoke outlet (9), and the lower part of the fluidized bed body is provided with a discharging hole (11) and a primary air inlet (8); a gas distribution plate (12) is further arranged at the bottom of the fluidized bed body, and the middle-to-lower part of fluidized bed body is provided with a secondary air inlet (7); and the waste gas outlet (5) is connected with an air preheater (6). The coal gangue fluidized slow-release combustion calcining furnace disclosed by the utility model has the advantages of even calcining temperature, uniform dwell time, continuous activation, few carry-over, high calcining efficiency and average quality of calcining products, and is especially applicable for calcination and activation of coal gangue, also for calcination and activation of other non-metallic materials including bauxite, fly ash, etc.
Description
Technical field
The utility model relates to calcining furnace, specifically belongs to a kind of gangue fluidization slowly-releasing burning calcining furnace.This calcining furnace is specially adapted to the calcined coal gangue activation, also can be used for the calcining and activating of other non-metallic material.
Background technology
Gangue is the solid waste that coal discharges in exploitation and process, it accounts for the 10-20% of coal production, the annual emissions of gangue reaches 5.6 hundred million tons, ended for the end of the year 2011, gangue is totally stacked more than 60 hundred million tons, take up an area more than 230,000 mu, become one of industrial solid castoff of China's discharge capacity maximum, account for more than 40% of national industrial solid castoff total emission volumn.Gangue store up in a large number serious society, the environment and economy problem brought.Because spontaneous combustion, leaching etc. causes serious atmosphere, water body and soil pollution, cause ecological environment frailty, bring serious threat for the sustainable development of coal enterprise.According to investigations, China's gangue mainly be used in pave the way, backfill and produce the aspect such as construction material, coal gangue power generation has become the direction of government encourage at present, but owing to reasons such as equipment attritions, utilization rate is lower.
Basic composition is of gangue: contain SiO
240%～60%, contains Al
2O
315%～40%, carbon containing 10%～20%.The aluminium silicone content is large in the gangue, and the raw material of production polymeric aluminum based flocculating agent and white carbon can be provided, and this is to enlarge gangue to utilize approach, solves the effective way that gangue is stored up and polluted, and is significant to realizing the China coal industry sustainable development.But the mineral composition of gangue is highly stable, namely aggregates into long-chain with silicon-oxy tetrahedron and alumina triangle body.Without SiO in the gangue of calcining
2, Al
2O
3Be not have activatedly, adopt which kind of method all can't be with SiO
2, Al
2O
3Effectively extract.Calcining is the effective means that excites gangue active, by Calcined Activate Coal Gangue, makes the kaolin component in the gangue dehydration occur at a certain temperature and decompose generation metakaolinite and unbodied SiO
2And Al
2O
3, more just can be the SiO in the spoil with chemical method
2, Al
2O
3Extract, can produce simultaneously aluminium system and silicon is chemical products.
At present, openly report both at home and abroad the calcining type of furnace of Calcined Activate Coal Gangue seldom, adopting more is traditional fluidized bed furnace.This type of furnace activation efficiency is low, and ash flies greatly, and the high-temperature flue gas heat is not utilized effectively, and causes energy waste.Simultaneously, this type of furnace concurrent heating system adopts the coal blending burning mode more, and the shortcoming of this concurrent heating mode is that material directly contacts with flame, causes the material local overheating, in order to lower the temperature, many pipe layings is set in the stove, and is large because wearing and tearing, and damages frequently, and the parking maintenance workload is large.More seriously can make material that obvious burning and caking phenomenon are arranged, produce waste material.Chinese patent: CN2491704Y discloses a kind of " cyclic bed fludizing calciner ", this stove is mainly used in dolime, lime stone and magnesite, the thermal-flame that heating system adopts coal gasifying combustion stove to produce enters body of heater through the high-speed rotational device, through the combustion chamber, the direct catalytic combustion of flame and material is also calcined, this type of furnace bed temperature is high, generally can reach more than 900 ℃, but this patent is not mentioned problem how to control temperature.This stove be only applicable to carbon-free and calcining heat at the material more than 900 ℃.The calcined coal gangue activation temperature is best at 650 ℃～750 ℃, and this stove calcining coal gangue exists that temperature control is difficult, the cooling system investment is large and the problem such as recondition expense is high.Chinese patent: CN2420499Y discloses " a kind of fluidized calcinator ", it is different from the circulation fluidized bed fluidized bed furnace, it adopts indirect, and band stirs and the round can type structure of vibrating device, and this type of furnace is mainly used in calcining the lower kaolin of phosphorus content or carbon-free nonmetallic mineral.And for calcining the gangue of phosphorus content up to about 20%, then exist length burning time, energy resource consumption to reach greatly material in defectives such as residing time in furnace length.Therefore, need research and development a kind of novel, adaptation calcined coal gangue activation condition, and the fluidization slowly-releasing that one-time investment is little, operating cost is low, energy resource consumption is few burning calcining furnace.
The utility model content
The purpose of this utility model is to overcome the calcining heat heterogeneity that exists in the present existing calcined coal gangue equipment, flame and material and directly contacts the low defective of material hot-spot, caking and calcination efficiency that produces, design calcining furnace a kind of indirect, fluidised and slowly-releasing auto-thermal, this calcining furnace calcining heat evenly, time of staying homogeneous, continuously activation, carry-over is few, calcination efficiency is high, the calcination product quality is even.
The utility model provides a kind of gangue fluidization slowly-releasing burning calcining furnace, comprise body of heater, heating jacket is set in the body of heater, the heating jacket bottom has the high-temperature gas entrance, top has waste gas outlet, be fluidized bed body in the heating jacket, fluidized bed body is up big and down small cylinder type, fluidized bed body top has charge door and high-temperature flue gas outlet, the bottom has discharging opening and primary air entrance, also be provided with gas distribution grid in the fluidized bed body bottom, have the auxiliary air entrance in the middle and lower part of fluidized bed body, waste gas outlet connects air preheater.
Calcining furnace technological principle and process: the gangue of graininess or powdery is sent into the charge door that is positioned at the body of heater top by charging mechanism, enter in the fluid bed, rely on self gravitation slowly to be displaced downwardly to the bottom of stove, in the process of slow decreasing, be heated about the high-temperature gas indirect to 700 ℃ in the cover and calcine.High-temperature gas enters heating jacket from the high-temperature gas entrance, and the waste gas behind the heated fluidized bed body is discharged from waste gas outlet, enters air preheater, and cold air is heated to about 200 ℃, and heat energy is recovered utilization.
The air that fluidisation is used is heated to about 200 ℃ through air preheater, enters bed from primary air entrance, auxiliary air entrance respectively.Primary air is in gas distributor enters fluid bed, evenly distribution after-blow animal material carries out fluidisation, material is in up and down flow regime under the blowing of fluidization air, oxygen and the carbon in the gangue in the fluidization air carries out the slowly-releasing auto-thermal simultaneously, carbon major part in the gangue is reacted at this, unburned completely carbon rises to an interior middle and upper part with high-temperature flue gas, contacts with auxiliary air again to react, until burning fully.Flue gas after the burning is discharged from the top high-temperature flue gas outlet of stove, enters pre-heat reclamation device, and produces steam for producing and life.The material that calcining is good passes through discharging mechanism, enters the stove external cooling device through discharging opening.
This design of Fluidized bed is that the top sectional area increases, and mainly is to allow ascending air speed reduce suddenly, be conducive to gangue and carry out second-time burning, and the high-temperature flue gas carry-over obviously reduces.
Gangue fluidization slowly-releasing calcining furnace of the present utility model is compared with existing calcining furnace has following advantage and effect:
The gangue fluidization slowly-releasing combustion technology that the utility model relates to, drawn the advantage of fluidized bed calcination stove, overcome the shortcoming of fluidized-bed kiln, utilize high-temperature flue gas heated fluidized bed bed body (indirect material), make the fluid bed thermally equivalent, can remain that temperature is in 650 ℃～750 ℃ scopes in the fluid bed.And gangue does not directly contact with flame, has avoided like this gangue hot-spot, thereby has avoided gangue burning in calcination process, caking phenomenon, has improved the efficient of calcined coal gangue activation.Simultaneously, can adopt means such as strengthening air capacity or reduction high-temperature flue-gas to control temperature, can remove like this descent of temperature facilities such as cooling pipe laying, save significantly investment and maintenance cost.
The hot-air that fluidisation is used enters in the stove from furnace bottom, blow material and be fluidization, make carbon and hot-air in the gangue carry out the slowly-releasing auto-thermal, the burning liberated heat both can reduce the consumption of the high-temperature gas of heating usefulness, can not make again and produce superheating phenomenon in the fluidized bed, not only take full advantage of the heat that the carbon burning in the gangue discharges, and reached the purpose of Calcined Activate Coal Gangue, saved significantly energy consumption.And material conversion is even, and the calcination product quality is good.
After the waste heat boiler that high-temperature flue gas behind the calcining and activating arranges outside stove reclaims heat, can produce steam and produce and life for full factory.Greatly reduce system energy consumption.
This calcining furnace can intermittently be calcined, also can continuous calcining.
Description of drawings
The structural representation of Fig. 1 the utility model calcining furnace
Among the figure: 1-body of heater, 2-heating jacket, 3-fluidized bed body, 4-high-temperature gas entrance, 5-waste gas outlet, 6-air preheater, 7-auxiliary air entrance, 8-primary air entrance, the outlet of 9-high-temperature flue gas, 10-charge door, 11-discharging opening, 12-gas distribution grid.
The specific embodiment
A kind of gangue fluidization slowly-releasing burning calcining furnace, as shown in Figure 1, comprise body of heater 1, the body of heater 1 interior heating jacket 2 that arranges, heating jacket 2 bottoms have high-temperature gas entrance 4, top has waste gas outlet 5, be fluidized bed body 3 in the heating jacket 2, fluidized bed body 3 is up big and down small cylinder type, fluidized bed body 3 tops have charge door 10 and high-temperature flue gas outlet 9, and the bottom has discharging opening 11 and primary air entrance 8, also is provided with gas distribution grid 12 in fluidized bed body 3 bottoms, have auxiliary air entrance 7 in the middle and lower part of fluidized bed body 3, waste gas outlet 5 connects air preheater 6.
Claims (1)
1. gangue fluidization slowly-releasing burning calcining furnace, comprise body of heater (1), heating jacket (2) is set in the body of heater (1), heating jacket (2) bottom has high-temperature gas entrance (4), top has waste gas outlet (5), be fluidized bed body (3) in the heating jacket (2), it is characterized in that, described fluidized bed body (3) is up big and down small cylinder type, fluidized bed body (3) top has charge door (10) and high-temperature flue gas outlet (9), the bottom has discharging opening (11) and primary air entrance (8), also be provided with gas distribution grid (12) in fluidized bed body (3) bottom, have auxiliary air entrance (7) in the middle and lower part of fluidized bed body (3), waste gas outlet (5) connects air preheater (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205402572U CN202868672U (en) | 2012-10-22 | 2012-10-22 | Coal gangue fluidized slow-release combustion calcining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205402572U CN202868672U (en) | 2012-10-22 | 2012-10-22 | Coal gangue fluidized slow-release combustion calcining furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202868672U true CN202868672U (en) | 2013-04-10 |
Family
ID=48035386
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205402572U Expired - Lifetime CN202868672U (en) | 2012-10-22 | 2012-10-22 | Coal gangue fluidized slow-release combustion calcining furnace |
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|---|---|
| CN (1) | CN202868672U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759255A (en) * | 2014-01-20 | 2014-04-30 | 苏州新区特氟龙塑料制品厂 | Teflon fluidized bed furnace |
| CN103864325A (en) * | 2014-03-25 | 2014-06-18 | 西安建筑科技大学 | Production system of suspended-state calcined coal gangues |
| CN107899520A (en) * | 2017-12-12 | 2018-04-13 | 中国科学院金属研究所 | A kind of high-temperature fluidized bed device |
| CN113213482A (en) * | 2021-04-29 | 2021-08-06 | 太原理工大学 | Method for extracting silicon and aluminum from activated coal gangue through plasma ball milling and vibratory fluidization calcination |
| CN115159888A (en) * | 2022-07-01 | 2022-10-11 | 沈阳化工大学 | Comprehensive utilization process method for bulk coal gangue |
-
2012
- 2012-10-22 CN CN2012205402572U patent/CN202868672U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759255A (en) * | 2014-01-20 | 2014-04-30 | 苏州新区特氟龙塑料制品厂 | Teflon fluidized bed furnace |
| CN103864325A (en) * | 2014-03-25 | 2014-06-18 | 西安建筑科技大学 | Production system of suspended-state calcined coal gangues |
| CN103864325B (en) * | 2014-03-25 | 2015-07-29 | 西安建筑科技大学 | A kind of production system of suspended state calcining coal gangue |
| CN107899520A (en) * | 2017-12-12 | 2018-04-13 | 中国科学院金属研究所 | A kind of high-temperature fluidized bed device |
| CN107899520B (en) * | 2017-12-12 | 2023-11-21 | 中国科学院金属研究所 | High-temperature fluidized bed reaction device |
| CN113213482A (en) * | 2021-04-29 | 2021-08-06 | 太原理工大学 | Method for extracting silicon and aluminum from activated coal gangue through plasma ball milling and vibratory fluidization calcination |
| CN113213482B (en) * | 2021-04-29 | 2023-02-14 | 太原理工大学 | Method for extracting silicon and aluminum from activated coal gangue through plasma ball milling and vibratory fluidization calcination |
| CN115159888A (en) * | 2022-07-01 | 2022-10-11 | 沈阳化工大学 | Comprehensive utilization process method for bulk coal gangue |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |