CN102649626A - Powdery material cyclic calcining system - Google Patents
Powdery material cyclic calcining system Download PDFInfo
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- CN102649626A CN102649626A CN2012101508074A CN201210150807A CN102649626A CN 102649626 A CN102649626 A CN 102649626A CN 2012101508074 A CN2012101508074 A CN 2012101508074A CN 201210150807 A CN201210150807 A CN 201210150807A CN 102649626 A CN102649626 A CN 102649626A
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- pipeline
- calcining
- dumping device
- whirlwind tube
- lock gas
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention discloses a powdery material cyclic calcining system which comprises a raw material inlet pipeline, a combustion chamber, a calcining decomposition pipeline, a cyclone, a cooling cyclone; a secondary air duct, a screening device and a conveying device, wherein the upper part of the raw material inlet pipeline is connected with a preheating pipeline; the combustion chamber is connected with the upper part of the preheating pipeline; an inlet of the calcining decomposition pipeline is communicated with the top of the combustion chamber; an inlet of the cyclone is connected with an outlet of the calcining decomposition pipeline; the top of the cyclone is connected with an exhaust duct; a discharge opening and a first air locking discharging device are arranged at the bottom of the cyclone; the first air locking discharging device is connected with a three-way pipe; another two ports are respectively connected with a second air locking discharging device and a third air locking discharging device; the third air locking discharging device is connected with the raw material inlet pipeline; an ascending pipe of the cooling cyclone is connected with the lower end of the raw material inlet pipeline; a discharge opening and a fourth air locking discharging device are arranged at the bottom of the cooling cyclone; the second air locking discharging device is connected with an inlet of the cooling cyclone; the secondary air duct is connected to the inlet of the cooling air duct; the screening device is arranged below the fourth air locking discharging device; and the conveying device is arranged below the screening device. According to the powdery material cyclic calcining system disclosed by the invention, calcining equipment for the powdery materials has the function of circularly combusting and decomposing; and finally, a powdery material calcining system can be used for stably producing qualified products.
Description
Technical field
The present invention relates to the powder calcining technology, particularly a kind of powder-material circulation calcination system.
Background technology
The mode of production of powder-material (as: powdery CaO, powdery CaOMgO, powdery MgO) all is to obtain through the block material of the macrobead of calcining is carried out fragmentation at present; Just earlier go out oarse-grained block material, obtain meeting the powder-material that operation down requires thereby give broken and screening through all kinds of disintegrating apparatus again by device fabrications such as rotary kiln, sleeve kiln, shaft furnaces.This type of method of obtaining powder-material has following shortcoming:
One, its production unit is not to design to powdery unslaked lime specially, therefore also needs follow-up broken process to replenish, and its process energy consumption is often higher, and has consumed valuable bulk material resource.
Two, equipment such as rotary kiln, sleeve kiln, shaft furnace can only use larger particles as raw material; Can't use the fine particle material as raw material; And in the process of mining, transportation and ore dressing, can produce a large amount of fine particle material, so raw material resources can't obtain fully effectively utilizing.
In addition, the technology that also has a kind of device to adopt the multistage cyclone tube to be in series no doubt has the sufficient advantage of preheating but exists the shortcoming of system complex equally.Also have a kind of technology can only make material one-way movement in system, its calcination time relative fixed, rate of decomposition can't further improve.
Summary of the invention
The object of the present invention is to provide a kind of powder-material circulation calcination system, make the calciner of pulverulent material possess the function of circulation calcining and decomposing, the powder-material calcination system can be reached stably produce specification product.
For achieving the above object, technical scheme of the present invention is:
A kind of powder-material circulation calcination system, it comprises, the feed(raw material)inlet pipeline, its top connects preheating pipe; One combustion chamber is connected in preheating pipe top, and the heating burner is established in the combustion chamber; The calcining and decomposing pipeline, its import is communicated with top of combustion chamber; The whirlwind tube, its import connects calcining and decomposing pipe outlet, the whirlwind tube top airduct that runs in, the discharge gate and the first lock gas dumping device are established in the bottom; The first lock gas dumping device connects a Y-tube, and two ports connect second, third lock gas dumping device respectively in addition; The 3rd lock gas dumping device is through the said feed(raw material)inlet of pipe connection pipeline; Cooling whirlwind tube, its top upcast connects the feed(raw material)inlet lower end of duct, and discharge gate and the 4th lock gas dumping device are established in the bottom; The described second lock gas dumping device passes through pipe connection in cooling whirlwind tube inlet pipeline; Secondary air channel is connected in cooling whirlwind tube inlet pipeline; Screening plant is arranged under the lock gas dumping device of cooling whirlwind tube bottom; E Foerderanlage is arranged under the screening plant; Air-flow gets into cooling whirlwind tube, preheating pipe, combustion chamber, calcining and decomposing pipeline, whirlwind tube and exhaust duct successively from secondary air channel, forms the negative pressure recycle system.
Further, also establish in the airflow line of described secondary air channel one can prevent the secondary air channel putty tremie pipe.
Establish blower fan in the described secondary air channel.
In addition, exhaust duct of the present invention connects cooling tower or sack cleaner or induced draft fan.
Air-flow of the present invention has following characteristics: the one, and air both can pass through system's negative pressure natural inflow; Also can pass through the quantitative air inlet of blower fan; If natural inflow: have the simple non-maintaining characteristics of equipment; But owing to be natural inflow, so air inlet can not be quantitative, so system's " empty coal than " to keep more air surplus with guarantee gas-fired fully; If the quantitative air inlet of blower fan: then require blast inlet seal for pipe joints property will get well the environmental pollution of avoiding local malleation to cause.In addition, because the longer middle-chain of airflow passes distance is more, therefore the system-wide control of leaking out is had relatively high expectations; Owing to powder-material is followed air-flow and moved, so its calcining and decomposing has in short-term characteristics fast, obtains the characteristics that effective calcining and decomposing system airflow will keep " low flow velocity " so will guarantee raw material.
Flow direction of material one of the present invention is: the feed(raw material)inlet → combustion chamber → calcining and decomposing pipeline → whirlwind tube → first lock gas dumping device → second lock gas dumping device → secondary air channel → cooling whirlwind tube → the 4th lock gas dumping device → screening plant → e Foerderanlage, last feeding warehouse.
Flow direction of material two is: the feed(raw material)inlet → combustion chamber → calcining and decomposing pipeline → whirlwind tube → first lock gas dumping device → the 3rd lock gas dumping device → preheating pipe → combustion chamber → calcining and decomposing pipeline → whirlwind tube → first lock gas dumping device → second lock gas dumping device → secondary air channel → cooling whirlwind tube → the 4th lock gas dumping device → screening plant → e Foerderanlage, last feeding warehouse.Wherein " the first lock gas dumping device → the 3rd lock gas dumping device → preheating pipe → combustion chamber → calcining and decomposing pipeline → whirlwind tube → first lock gas dumping device " is the circulation calcining and decomposing process of material.
The present invention compared with prior art has following beneficial effect:
One, do not use the good lumpy material of calcining as raw material, make valuable lumpy material can bring into play bigger effect.
Two, compare and the lumpy material fragmentation is obtained powdery unslaked lime technology it has lower unit consumption of energy.
Three, improved effective utilization greatly, some fines that in mining, transportation, screening process, produce can be fully utilized ore resource.
Four, compare original powder calcining technology, present device is simple, only is designed with a whirlwind tube and a cooling whirlwind tube, and raw material gets into system arrangement at the burner place, has guaranteed that material can obtain maximum decomposition heat in system.
Five, two lock gas dumping device are set again under whirlwind tube lock gas dumping device; Lead to secondary air pipeline and preheating pipe respectively; And the material that leads to preheating pipe will can be adjusted the material ratio of circulation calcining and decomposing according to the rate of decomposition of product by calcining and decomposing once more in the production operation.
The present invention can produce and meet necessarily required pulverulent material (as: powdery CaO, powdery CaOMgO, powdery MgO) material confession user use.
Description of drawings
Fig. 1 is the synoptic diagram of the embodiment of the invention.
Embodiment
Referring to Fig. 1, powder-material circulation calcination system of the present invention comprises, feed(raw material)inlet pipeline 1, and its top connects preheating pipe 2; One combustion chamber 3 is connected in preheating pipe 2 tops, and heating burner 31 is established in combustion chamber 3; Calcining and decomposing pipeline 4, its import is communicated with 3 tops, combustion chamber; Whirlwind tube 5, its import connect 4 outlets of calcining and decomposing pipeline, the whirlwind tube 5 tops airduct 6 that runs in, and the discharge gate 51 and the first lock gas dumping device 7 are established in the bottom; The first lock gas dumping device 7 connects a Y-tube 8, and two ports connect second, third lock gas dumping device 7 ', 7 respectively in addition "; The 3rd lock gas dumping device 7 " through the said feed(raw material)inlet of pipe connection pipeline 1; Cooling whirlwind tube 9, its top upcast connects pipeline 1 lower end, feed(raw material)inlet, and discharge gate and the 4th lock gas dumping device 10 are established in the bottom; The described second lock gas dumping device 7 ' passes through pipe connection in cooling whirlwind tube 9 inlet pipelines; Secondary air channel 11 is connected in cooling whirlwind tube 9 inlet pipelines; Screening plant 12 is arranged at the 4th of cooling whirlwind tube 9 bottoms and locks the gas dumping device 10 times; E Foerderanlage 13 is arranged at screening plant 12 times;
Air-flow gets into cooling whirlwind tube 9, preheating pipe 2, combustion chamber 3, calcining and decomposing pipeline 4, whirlwind tube 5 and exhaust duct 6 successively from secondary air channel 11, forms the negative pressure recycle system.
Further, also establish one in the airflow line of described secondary air channel 11 and can prevent the tremie pipe 14 of secondary air channel putty, and pass through screening plant 16 to e Foerderanlage 13.
In addition, described exhaust duct 6 connects cooling tower or sack cleaner or induced draft fan.
After the fine (granularity is generally less than 5mm) of water cut lower (less than 2%) gets into combustion chamber 3 from feed(raw material)inlet pipeline 1, both got into the high temperature gas flow heating that is produced by burner, and brought into calcining and decomposing pipeline 4 by hot gas flow from bottom to top; Material is obtained satisfactory product by calcining and decomposing in this process, after air-flow gets into whirlwind tube 5 with material; Air-flow and material are separated in this whirlwind tube, and air-flow upwards gets into exhaust duct 6, further through equipment such as cooling tower, sack cleaner and induced draft fans air-flow are entered atmosphere; Material gets into the second lock gas dumping device 7 ' and the 3rd lock gas dumping device 7 then through 7 discharges downwards of the first lock gas dumping device ", when the second lock gas dumping device 7 ' moves and the 3rd lock gas dumping device 7 " when stopping; Material all gets into secondary air channel 11; Brought in the cooling whirlwind tube 9 by air-flow then, in cooling whirlwind tube 9, carry out separating of air-flow and material, air-flow gets into combustion chamber 3; Material is discharged downwards from the 4th lock gas dumping device 10; Get into screening plant 12, again by e Foerderanlage 13, last feeding warehouse; When the 3rd lock gas dumping device 7 " when operation and the second lock gas dumping device 7 ' stopped, material all got into the calcining and decomposing that circulates once more behind the preheating pipe 2; Can be during operation through control second lock gas dumping device 7 ' and the 3rd lock gas dumping device 7 " travelling speed regulate different blanking amounts, purpose is to obtain the product of high de-agglomeration rate to satisfy the demands.
Air-flow also can be brought secondary air channel into by blower fan; Get in the cooling whirlwind tube, get into preheating pipe again, the back gets into the combustion chamber; Get into the calcining and decomposing pipeline then, get into whirlwind tube and exhaust duct again, further air-flow is entered atmosphere through equipment such as cooling tower, sack cleaner and induced draft fans.
The present invention can particularly have the enterprise of large-sized rotary kiln, shaft furnace, sleeve kiln plant adaptable across industries such as metallurgy lime, anti-materials, because these stoves often have a large amount of fines to produce.As long as stable particulate and coal gas or coal dust supply are arranged, just possessed the pacing items of building this device, it can make those fines that are difficult to utilize become the pulverulent material that can supply the user to use.
Claims (4)
1. a powder-material circulation calcination system is characterized in that, comprise,
The feed(raw material)inlet pipeline, its top connects preheating pipe;
One combustion chamber is connected in preheating pipe top, and the heating burner is established in the combustion chamber;
The calcining and decomposing pipeline, its import is communicated with top of combustion chamber;
The whirlwind tube, its import connects calcining and decomposing pipe outlet, the whirlwind tube top airduct that runs in, the discharge gate and the first lock gas dumping device are established in the bottom; The first lock gas dumping device connects a Y-tube, and two ports connect second, third lock gas dumping device respectively in addition; The 3rd lock gas dumping device is through the said feed(raw material)inlet of pipe connection pipeline;
Cooling whirlwind tube, its top upcast connects the feed(raw material)inlet lower end of duct, and discharge gate and the 4th lock gas dumping device are established in the bottom; The described second lock gas dumping device passes through pipe connection in cooling whirlwind tube inlet pipeline;
Secondary air channel is connected in cooling whirlwind tube inlet pipeline;
Screening plant is arranged under the lock gas dumping device of cooling whirlwind tube bottom;
E Foerderanlage is arranged under the screening plant;
Air-flow gets into cooling whirlwind tube, preheating pipe, combustion chamber, calcining and decomposing pipeline, whirlwind tube and exhaust duct successively from secondary air channel, forms the negative pressure recycle system.
2. powder-material circulation calcination system as claimed in claim 1 is characterized in that, also establish in the airflow line of described secondary air channel one can prevent the secondary air channel putty tremie pipe.
3. according to claim 1 or claim 2 powder-material circulation calcination system is characterized in that, establishes blower fan in the described secondary air channel.
4. powder-material circulation calcination system as claimed in claim 1 is characterized in that described exhaust duct connects cooling tower or sack cleaner or induced draft fan.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210150807.4A CN102649626B (en) | 2012-05-15 | 2012-05-15 | Powdery material cyclic calcining system |
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| CN201210150807.4A CN102649626B (en) | 2012-05-15 | 2012-05-15 | Powdery material cyclic calcining system |
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| CN102649626A true CN102649626A (en) | 2012-08-29 |
| CN102649626B CN102649626B (en) | 2014-07-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673640A (en) * | 2012-09-19 | 2014-03-26 | 财团法人工业技术研究院 | Backflow suspension type calcining furnace system and using method thereof |
| US9610537B2 (en) | 2013-12-11 | 2017-04-04 | Industrial Technology Research Institute | Loop tower CO2 capture system, carbonator, calciner and operating method thereof |
| CN111559876A (en) * | 2020-07-15 | 2020-08-21 | 沈阳鑫博工业技术股份有限公司 | Light-burned magnesium oxide suspension roasting furnace ash treatment system and method |
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| CN101570405A (en) * | 2009-06-09 | 2009-11-04 | 宝山钢铁股份有限公司 | Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate |
| CN101921071A (en) * | 2009-06-09 | 2010-12-22 | 宝山钢铁股份有限公司 | Method for removing formed ring in rotary kiln coal powder injection |
| CN101921072A (en) * | 2009-06-09 | 2010-12-22 | 宝山钢铁股份有限公司 | Method for removing ring formation of rotary kiln for active lime calcination |
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2012
- 2012-05-15 CN CN201210150807.4A patent/CN102649626B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570405A (en) * | 2009-06-09 | 2009-11-04 | 宝山钢铁股份有限公司 | Method for removing formed ring of rotary kiln under high temperature by using forsterite and sodium silicate |
| CN101921071A (en) * | 2009-06-09 | 2010-12-22 | 宝山钢铁股份有限公司 | Method for removing formed ring in rotary kiln coal powder injection |
| CN101921072A (en) * | 2009-06-09 | 2010-12-22 | 宝山钢铁股份有限公司 | Method for removing ring formation of rotary kiln for active lime calcination |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673640A (en) * | 2012-09-19 | 2014-03-26 | 财团法人工业技术研究院 | Backflow suspension type calcining furnace system and using method thereof |
| CN103673640B (en) * | 2012-09-19 | 2015-04-29 | 财团法人工业技术研究院 | Backflow suspension type calcining furnace system and using method thereof |
| US9610537B2 (en) | 2013-12-11 | 2017-04-04 | Industrial Technology Research Institute | Loop tower CO2 capture system, carbonator, calciner and operating method thereof |
| CN111559876A (en) * | 2020-07-15 | 2020-08-21 | 沈阳鑫博工业技术股份有限公司 | Light-burned magnesium oxide suspension roasting furnace ash treatment system and method |
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| CN102649626B (en) | 2014-07-23 |
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