CN105180645A - Rotary kiln system capable of utilizing residual heat for stoving and with no dirt retention on induced draft fan - Google Patents
Rotary kiln system capable of utilizing residual heat for stoving and with no dirt retention on induced draft fan Download PDFInfo
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- CN105180645A CN105180645A CN201510555181.9A CN201510555181A CN105180645A CN 105180645 A CN105180645 A CN 105180645A CN 201510555181 A CN201510555181 A CN 201510555181A CN 105180645 A CN105180645 A CN 105180645A
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Abstract
The invention discloses a rotary kiln system capable of utilizing residual heat for stoving and with no dirt retention on an induced draft fan. A rotary kiln is arranged in an inclined manner; a burner is arranged in the rotary kiln; the high end of the rotary kiln and one end of a dryer are connected with an air hose in a bidirectional manner through a discharging pipe; a conveyer belt is arranged in the dryer and is connected with the discharging pipe; a star discharger is arranged at the other end of the dryer; a bulged refractory slab is arranged in the rotary kiln; the induced draft fan for dust removal has the structure of wedge-shaped blades and a dished backboard. According to the invention, the bulged refractory slab increases the heat transfer area of the rotary kiln, promotes stirring of a material, and facilitates improvement of thermal efficiency; the dryer utilizes residual heat to facilitate forming and drying of a globular material; residual heat utilization and heat preservation consequent reaction of hot material have the remarkable energy-saving characteristic; a quenching liquid pool rapidly cools a pellet material, and plenty of water is evaporated through reaction, so that the environmental protection pressure caused by expansion of producing fluid is effectively relieved; the induced draft fan does not accumulate dirt to completely eradicate a safety accident; the rotary kiln system is particularly suitable for burning processing of vanadium ore and is broad in application prospect.
Description
Technical field
The present invention relates to a kind of rotary kiln, specifically refer to that tail heat is dried and the rotary kiln system of air-introduced machine not laying dust.
Background technology
Rotary kiln due to adaptable, operating cost is low, reliability is strong, be one of the main preferred unit of mineral batching, balling-up, reaction and drying, be specially adapted to the processing calcination of navajoite.Rotary kiln needs consume fuel to keep the high temperature be applicable in kiln in the course of work, containing a large amount of heat energy and dust in the tail gas of thus rotary kiln discharge, needs to purify tail gas and tail heat recovery operation, realizes energy-saving and emission-reduction.
Rotary kiln is generally cylindrical shape, and thus the heat transfer area of material and kiln body is very little, causes the thermal efficiency not high.
Blower fan is the key equipment that rotary kiln carries out dedusting and recuperation of heat; blower fan is generally centrifugal blower; blower fan continuous, stable, reliably working is very crucial to the dedusting of rotary kiln; the occasion used due to rotary kiln all contains certain dust mostly; during blower fan work; air-flow by during the draught fan impeller of High Rotation Speed due to centrifugation, dust granule can depart from air-flow phase and deposit and be attached on draught fan impeller.
Because draught fan impeller rotating speed is general all higher, as long as there is micro-dust to exist in air-flow, all more dust can be accumulated after working long hours, thus change the balance of draught fan impeller rotation, if draught fan impeller does not have self purification not clear up in time to dust yet, will cumulative and progressively change draught fan impeller Static and dynamic balance, thus produce vibration.Have the dust that part hardens to be come off by vibration once run into, will balance away from the dynamic rotary of blower fan immediately, then produce judder, this may cause serious personnel and device security accident.If can centrifugal fan impeller be designed, Automatic clearance can be carried out and just do not worry causing dust accumulation, for keeping the reliable and stable work of blower fan and stopping the meaning that security incident all has particular importance.
Therefore, if design thermal efficiency is high, tail recuperation of heat and good dedusting effect, material pass in and out smooth, serialization degree is high and the rotary kiln system of air-introduced machine not laying dust, all significant for realizing energy-saving and emission-reduction, increasing work efficiency and stopping security incident.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art exactly, provides a kind of simple and practical, the thermal efficiency is high, tail recuperation of heat and good dedusting effect, material pass in and out smoothness, serialization degree is high and the rotary kiln system of air-introduced machine not laying dust.
For overcoming the deficiencies in the prior art, the present invention takes following technical scheme:
A kind of tail heat is dried and the rotary kiln system of air-introduced machine not laying dust, comprise rotary kiln, it is characterized in that: rotary kiln is in tilted layout, built-in combustion device, rotary kiln is high-end to be bi-directionally connected by material blanking tube and airduct with one end of dryer, be provided with conveyer belt in dryer and connect material blanking tube, the other end of dryer is provided with wind stopping device; Protruding refractory slab is provided with in rotary kiln; Described dryer connects air-introduced machine through cyclone dust collectors, and the exhaust outlet of air-introduced machine connects sack cleaner, connects wind stopping device, be provided with the bucket that gathers dust below wind stopping device below cyclone dust collectors; Described air-introduced machine comprises draught fan impeller and casing, and draught fan impeller comprises impeller backboard, impeller panel and blade, and blade arrangement becomes impeller Axial and radial, centrosymmetric hollow wedge, and impeller backboard is dish; Hollow wedge blade connects impeller panel and is welded to form impeller bodies with dish-shaped impeller backboard; Impeller panel is provided with air inlet, dish-shaped impeller backboard by the fixing also connection shaft seat of rivet, and axle bed is connected by axis hole and fan shaft; Casing is provided with air inlet and air outlet, cabinet form outline line is involute, the round heart of involute and blower fan axis coinciding, involute is from inside shell air outlet, line radius strengthens gradually with involute circle, terminate outside shell air outlet, shell air outlet width equals involute circumference; Shell air inlet is provided with cover plate, cover plate also has air inlet be convenient to connecting pipe, and axle center and impeller axis coinciding.
Described burner connects air shut-off valve and fuel control valve.
Be provided with fan in described dryer, be conducive to the drying of material.
Described wind stopping device connects pan-pelletizer, and pan-pelletizer connects blender.
The low side of described rotary kiln connects insulation reaction bucket, and insulation reaction bucket connects chilling liquid pool, is furnished with out material strip in chilling liquid pool, goes out material strip roller of being commissioned and supports.
The refractory slab of described projection is trapezoidal or rectangle or triangle.
Described casing is fixed on support.Casing plays sealing process, air inlet air inlet obtains kinetic energy by vane rotary, and carries out power conversion in casing, and a part of kinetic energy is converted to the static energy of gas, make output gas flow have speed dynamic head like this and also have hydrostatic head, both sums are exactly blower press.
Shell air inlet can connect airduct according to need, air inlet cover plate is detachable, be bolted to connection casing, the scroll casing shape of casing is gradually opened profile and is met the needs that Fan casing is airtight, conveying gas realizes energy efficient conversion simultaneously, makes output gas flow can reach required flow and total head.
Described shell air inlet cover plate is bolted to connection casing, and can dismantle.
Rotary kiln is the core component of system, and general structure is all steel cylinder internal fixtion refractory insulating layer, in the design by the refractory slab of projection can continuously, interruption, length, the multiple combination form such as uniform form firmly in steel cylinder refractory material overall.
Arrange burner in rotary kiln, burner connects air shut-off valve and fuel control valve, and fuel can be the coal dust that coal gas may also be compressed air delivery and comes in, ejection burning in burner.
Mineral powder mixes in blender, export and carry out granulation at pan-pelletizer, dryer is entered by wind stopping device, in dryer, material is carried from left to right by conveyer belt, carry out counter-current drying and the pre-heat treatment with tail gas stream from right to left, fan can penetrate material by strengthening flow, strengthens drying and preheating effect, spherical material through the pre-heat treatment can be fallen into rotary kiln by material blanking tube, and tracheae realizes air-flow conducting; Combustion gas is move from left to right in rotary kiln, to move from right to left formation countercurrent flow, realize high-temperature process with material.
Rotary kiln has suitable inclination angle, control certain rotating speed rotate, material can realize controlled by high-end to low end motion, complete operation, protruding refractory slab can grasp material simultaneously, promotes material turning, greatly increase flame heating surface (area) (HS simultaneously, be conducive to reaching reaction temperature fast, raise the efficiency.
Export to low side after spherical material pyroreaction, enter insulation reaction bucket, proceed residual heat high-temperature subsequent reactions, material strip is furnished with out in chilling liquid pool, can being reactant liquor in chilling pond, ball material being cooled rapidly and reacts, entering chilling liquid pool by controlling out material strip motion from the output of insulation reaction bottom of the barrel, carrying roller can effectively improve the bearing capacity material strip, exports just can enter lower step treatment process to solidliquid mixture in pond.
Tail gas exports connection cyclone separator by dryer by left end and completes dedusting and output, and central tube exports dedusting gas and connects air-introduced machine, and air-introduced machine outlet connects sack cleaner and realizes final dusting.
When draught fan impeller of the present invention uses, because blade design becomes hollow wedge, and sharf radial center is symmetrical, thus during High Rotation Speed, blade surface has centrifugal self purification under centrifugal action, make dust be subject to centrifugal action and cannot adhere to, dynamic, the static balancing of impeller would not be affected like this, more can not accumulate dust; The technical scheme of this blade construction, the wide impeller air-introduced machine being particularly suitable for delivery air amount large adopts.
Compared with the impeller backboard of common air-introduced machine, the characteristics and advantages of dish impeller backboard is: when steel plate thickness is the same, dish backboard due to rigidity reinforced, stress dispersion, elastic buffer improve and shape stability also significantly improve, thus bearing capacity can be enhanced about more than once on common flat backboard basis.Because backboard almost carries whole fans load, understand more durable so dish made by backboard, the wheel hub of truck is because have disc structure, so bearing capacity strengthens, also more durable.
Compared with prior art, beneficial effect of the present invention is also:
Protruding refractory slab adds the heat transfer area of rotary kiln, promotes material turning, is conducive to reaching reaction temperature fast, improves the thermal efficiency; Dryer realizes tail heat utilization, is conducive to the shaping and dry of spherical material; Tail heat utilization and thermal material are incubated subsequent reactions and have remarkable characteristics of energy saving, chilling liquid pool cools rapidly to ball material, react and can evaporate large quantity of moisture, effective environmental protection pressure alleviated production liquid and expand, is particularly suitable for the calcination processing of navajoite, has a extensive future.
Vanes on Induced Draft Fan is designed to hollow wedge, and sharf radial center is symmetrical, and the blower fan backboard making it connect and the anti-relative torsion of panel, to extrude rigidity extremely strong, can stop to use the fan blade caused to connect the fracture of backboard root for a long time.
Vanes on Induced Draft Fan is designed to hollow wedge, and sharf radial center is symmetrical, even also can obtain higher intensity with thinner board making draught fan impeller, ensures to stablize, reliably use, can save material, be convenient to make, be also conducive to light and handyization of equipment.
Vanes on Induced Draft Fan ingehious design is become hollow wedge by the present invention, and the shape of sharf radial center symmetry, achieve the real-time cleaning of dust on blade, extend the security incident also effectively stopping dust accumulation initiation service life of equipment, have a extensive future.
Accompanying drawing explanation
Fig. 1 is planar structure schematic diagram of the present invention.
Fig. 2 is the cross section structure schematic diagram of rotary kiln.
Fig. 3 is the planar structure schematic diagram of draught fan impeller.
Fig. 4 is the cross-sectional view of draught fan impeller.
Fig. 5 is the planar structure schematic diagram of air-introduced machine.
In figure, each label represents:
A, air-introduced machine; 1, rotary kiln; 2, insulation reaction bucket; 3, material strip is gone out; 4, chilling liquid pool; 5, protruding refractory slab (trapezoidal); 6, burner; 7, flame; 8, cyclone dust collectors; 9, airduct; 10, sack cleaner; 11, wind stopping device; 12, pan-pelletizer; 13, blender; 14, conveyer belt; 15, fan; 16, dryer, 17, tracheae; 18, material blanking tube; 19, air shut-off valve; 20, fuel control valve; 21, spherical material; 22, carrying roller; 23, gather dust bucket; 31, Wedge blade; 32, impeller cylindrical; 33, impeller air inlet; 34, axle bed; 35, rivet; 36, axis hole; 37, dish-shaped impeller backboard; 38, impeller panel; 41, impeller; 42, shell air inlet; 43, involute circle; 44, support; 45, casing; 46, shell air inlet cover plate; 47, shell air outlet.
Detailed description of the invention
Now by reference to the accompanying drawings, the present invention is illustrated further.
As shown in Figure 1, Figure 2, the heat of tail shown in Fig. 3, Fig. 4 and Fig. 5 is dried and the rotary kiln system of air-introduced machine not laying dust, comprise rotary kiln 1, rotary kiln 1 is in tilted layout, built-in combustion device 6, rotary kiln 1 is high-end to be bi-directionally connected by material blanking tube 18 and airduct 17 with one end of dryer 16, be provided with conveyer belt 14 in dryer 16 and connect material blanking tube 18, the other end of dryer 16 is provided with wind stopping device 11; Protruding refractory slab 5 is provided with in rotary kiln 1; Described dryer 16 connects air-introduced machine A through cyclone dust collectors 8, and the exhaust outlet of air-introduced machine A connects sack cleaner 10, connects wind stopping device 11, be provided with the bucket 23 that gathers dust below wind stopping device 11 below cyclone dust collectors 8; Described air-introduced machine A comprises draught fan impeller 41 and casing 45, and draught fan impeller 41 comprises impeller backboard 37, impeller panel 38 and blade 31, and blade 31 is arranged to impeller Axial and radial, centrosymmetric hollow wedge, and impeller backboard 37 is dish; Hollow wedge blade 31 connects impeller panel 38 and is welded to form impeller bodies with dish-shaped impeller backboard 37; Impeller panel 38 is provided with air inlet 33, dish-shaped impeller backboard 37 by the fixing also connection shaft seat 34 of rivet 35, and axle bed 34 is connected by axis hole 36 and fan shaft; Casing 45 is provided with air inlet 42 and air outlet 47, cabinet form outline line is involute, the round heart of involute and blower fan axis coinciding, involute is from inside shell air outlet 47, line radius strengthens gradually with involute circle, terminate outside shell air outlet 47, shell air outlet width equals involute circle 43 girths; Shell air inlet 42 is provided with cover plate 46, cover plate also has air inlet be convenient to connecting pipe, and axle center and impeller axis coinciding.
Described burner 6 connects air shut-off valve 19 and fuel control valve 20.
Be provided with fan 15 in described dryer 16, be conducive to the drying of material.
Described wind stopping device 11 connects pan-pelletizer 12, and pan-pelletizer 12 connects blender 13.
The low side of described rotary kiln 1 connects insulation reaction bucket 2, and insulation reaction bucket 2 connects chilling liquid pool 4, is furnished with out material strip 3 in chilling liquid pool 4, goes out material strip 3 and supports 22 by carrying roller.
The refractory slab of described projection is trapezoidal or rectangle or triangle.
Described casing 45 is fixed on support 44.Casing 45 plays sealing process, air inlet 42 air inlet is rotated by impeller 41 and obtains kinetic energy, and carries out power conversion in casing 45, and a part of kinetic energy is converted to the static energy of gas, make output gas flow have speed dynamic head like this and also have hydrostatic head, both sums are exactly blower press.
Shell air inlet 42 can connect airduct according to need, air inlet cover plate 46 is detachable, be bolted to connection casing 45, the scroll casing shape of casing 45 is gradually opened profile and is met the needs that Fan casing is airtight, conveying gas realizes energy efficient conversion simultaneously, makes output gas flow can reach required flow and total head.
Described shell air inlet cover plate 46 is bolted to connection casing 45, and can dismantle.
Rotary kiln 1 is the core component of system, and general structure is all steel cylinder internal fixtion refractory insulating layer, in the design by the refractory slab 5 of projection can continuously, interruption, length, the multiple combination form such as uniform form firmly in steel cylinder refractory material overall.
Arrange burner 6 in rotary kiln 1, burner 6 connects air shut-off valve 19 and fuel control valve 20, and fuel can be the coal dust that coal gas may also be compressed air delivery and comes in, and burner 6 in, ejection is burnt.
Mineral powder mixes in blender 13, export and carry out granulation at pan-pelletizer 12, dryer 16 is entered by wind stopping device 11, in dryer, material is carried from left to right by conveyer belt 14, carry out counter-current drying and the pre-heat treatment with tail gas stream from right to left, fan 15 can penetrate material by strengthening flow, strengthens drying and preheating effect, spherical material 21 through the pre-heat treatment can be fallen into rotary kiln 1 by material blanking tube 18, and tracheae realizes 17 air-flow conductings; Combustion gas is move from left to right in rotary kiln 1, to move from right to left formation countercurrent flow, realize high-temperature process with material.
Rotary kiln 1 has suitable inclination angle, control certain rotating speed to rotate, material can realize controlled by high-end to low end motion, complete operation simultaneously, protruding refractory slab 5 can grasp material, promotes material turning, greatly increases flame heating surface (area) (HS simultaneously, be conducive to reaching reaction temperature fast, raise the efficiency.
Export to low side after spherical material 21 pyroreaction, enter insulation reaction bucket 2, proceed residual heat high-temperature subsequent reactions, material strip 3 is furnished with out in chilling liquid pool 4, can be reactant liquor in chilling pond 4, ball material is cooled rapidly and reacts, by control out material strip 3 move bottom insulation reaction bucket 2 export enter chilling liquid pool 4, carrying roller 22 can effectively improve the bearing capacity material strip 3, exports just can enter lower step treatment process to solidliquid mixture in pond.
Tail gas exports connection cyclone separator 8 by dryer 16 by left end and completes dedusting and output, and central tube exports dedusting gas and connects air-introduced machine A, and air-introduced machine A outlet connects sack cleaner 10 and realizes final dusting.
When air-introduced machine A impeller of the present invention uses, because blade design becomes hollow wedge, and sharf radial center is symmetrical, thus during High Rotation Speed, blade surface has centrifugal self purification under centrifugal action, make dust be subject to centrifugal action and cannot adhere to, dynamic, the static balancing of impeller would not be affected like this, more can not accumulate dust; The technical scheme of this blade construction, the wide impeller air-introduced machine being particularly suitable for delivery air amount large adopts.
Compared with the impeller backboard of common air-introduced machine, the characteristics and advantages of dish impeller backboard is: when steel plate thickness is the same, dish backboard due to rigidity reinforced, stress dispersion, elastic buffer improve and shape stability also significantly improve, thus bearing capacity can be enhanced about more than once on common flat backboard basis.Because backboard almost carries whole fans load, understand more durable so dish made by backboard, the wheel hub of truck is because have disc structure, so bearing capacity strengthens, also more durable.
Above-mentioned just preferred embodiment of the present invention, not does any pro forma restriction to the present invention.Any those of ordinary skill in the art, when not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or being revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.
Claims (8)
1. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust, comprise rotary kiln, it is characterized in that: rotary kiln is in tilted layout, built-in combustion device, rotary kiln is high-end to be bi-directionally connected by material blanking tube and airduct with one end of dryer, be provided with conveyer belt in dryer and connect material blanking tube, the other end of dryer is provided with wind stopping device; Protruding refractory slab is provided with in rotary kiln; Described dryer connects air-introduced machine through cyclone dust collectors, and the exhaust outlet of air-introduced machine connects sack cleaner, connects wind stopping device, be provided with the bucket that gathers dust below wind stopping device below cyclone dust collectors; Described air-introduced machine comprises draught fan impeller and casing, and draught fan impeller comprises impeller backboard, impeller panel and blade, and blade arrangement becomes impeller Axial and radial, centrosymmetric hollow wedge, and impeller backboard is dish; Hollow wedge blade connects impeller panel and is welded to form impeller bodies with dish-shaped impeller backboard; Impeller panel is provided with air inlet, dish-shaped impeller backboard by the fixing also connection shaft seat of rivet, and axle bed is connected by axis hole and fan shaft; Casing is provided with air inlet and air outlet, cabinet form outline line is involute, the round heart of involute and blower fan axis coinciding, involute is from inside shell air outlet, line radius strengthens gradually with involute circle, terminate outside shell air outlet, shell air outlet width equals involute circumference; Shell air inlet is provided with cover plate, cover plate also has air inlet be convenient to connecting pipe, and axle center and impeller axis coinciding.
2. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, it is characterized in that: described burner connects air shut-off valve and fuel control valve.
3. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, it is characterized in that: be provided with fan in described dryer, is conducive to the drying of material.
4. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, and it is characterized in that: described wind stopping device connects pan-pelletizer, pan-pelletizer connects blender.
5. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, it is characterized in that: the low side of described rotary kiln connects insulation reaction bucket, insulation reaction bucket connects chilling liquid pool, is furnished with out material strip in chilling liquid pool, goes out material strip roller of being commissioned and supports.
6. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, it is characterized in that: the refractory slab of described projection is trapezoidal or rectangle or triangle.
7. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, it is characterized in that: described casing is fixed on support.
8. tail heat is dried and the rotary kiln system of air-introduced machine not laying dust according to claim 1, it is characterized in that: described shell air inlet cover plate is bolted to connection casing, and can dismantle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555181.9A CN105180645B (en) | 2015-09-05 | 2015-09-05 | A kind of rotation kiln system of the drying of tail heat and air-introduced machine not laying dust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510555181.9A CN105180645B (en) | 2015-09-05 | 2015-09-05 | A kind of rotation kiln system of the drying of tail heat and air-introduced machine not laying dust |
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| CN105180645A true CN105180645A (en) | 2015-12-23 |
| CN105180645B CN105180645B (en) | 2017-09-19 |
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| CN201510555181.9A Active CN105180645B (en) | 2015-09-05 | 2015-09-05 | A kind of rotation kiln system of the drying of tail heat and air-introduced machine not laying dust |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571887A (en) * | 2017-08-16 | 2018-09-25 | 江苏安必信环保设备有限公司 | A kind of interior heat pipe rotary calciner |
| CN113137856A (en) * | 2021-05-12 | 2021-07-20 | 江苏惠然实业有限公司 | A energy-saving drying device of drying kiln for wet ore dehydration |
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| KR20080008154A (en) * | 2006-07-19 | 2008-01-23 | 아름다운 환경건설(주) | Apparatus for purifying contaminated soil, method therefor, pre-heater feeding device and rotary kiln type purifying device used to them |
| CN202109747U (en) * | 2011-06-15 | 2012-01-11 | 金川集团有限公司 | Anti-bonding kiln roller |
| CN102439116A (en) * | 2009-05-14 | 2012-05-02 | 超技术股份有限公司 | A pyrolytic process and apparatus for producing biomass char and energy |
| CN102661666A (en) * | 2012-04-20 | 2012-09-12 | 南京苏冶钙业技术有限公司 | Tail gas utilization method and tail gas utilization system of rotary lime kiln |
| CN204006029U (en) * | 2014-07-11 | 2014-12-10 | 浙江三联环保机械设备有限公司 | The comprehensive drying and incineration system of a kind of built-in mud |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR551607A (en) * | 1921-08-30 | 1923-04-10 | Anciens Etablissements Grouvel | Blade for centrifugal fan impeller |
| JPH06328440A (en) * | 1993-05-18 | 1994-11-29 | J Shii Ee:Kk | Manufacturing device of activated charcoal having waste tire as raw material therefor |
| CN2758599Y (en) * | 2004-12-31 | 2006-02-15 | 北京中基绿谷生态科技有限公司 | Rotary kiln type incinerator for dangerous waste |
| KR20080008154A (en) * | 2006-07-19 | 2008-01-23 | 아름다운 환경건설(주) | Apparatus for purifying contaminated soil, method therefor, pre-heater feeding device and rotary kiln type purifying device used to them |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108571887A (en) * | 2017-08-16 | 2018-09-25 | 江苏安必信环保设备有限公司 | A kind of interior heat pipe rotary calciner |
| CN113137856A (en) * | 2021-05-12 | 2021-07-20 | 江苏惠然实业有限公司 | A energy-saving drying device of drying kiln for wet ore dehydration |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105180645B (en) | 2017-09-19 |
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