CN201508106U - Rotary calciner for producing alumina - Google Patents
Rotary calciner for producing alumina Download PDFInfo
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- CN201508106U CN201508106U CN2009200344545U CN200920034454U CN201508106U CN 201508106 U CN201508106 U CN 201508106U CN 2009200344545 U CN2009200344545 U CN 2009200344545U CN 200920034454 U CN200920034454 U CN 200920034454U CN 201508106 U CN201508106 U CN 201508106U
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Abstract
The utility model relates to a rotary calciner for producing alumina comprising following parts: the middle part of a cylinder body is provided with a major spiral; a feeding end at front end of the cylinder body is provided with a feeding spiral conveyor and a feeding sealing mechanism; a discharging end at rear end of the cylinder body is provided with a discharging spiral conveyor and a discharging sealing mechanism; a heating device comprises a sleeve and a sleeve sealing mechanism. The rotary calciner adopts a PTFE corrugated pipe, a mechanical sealing and trapeziform PTFE and the like sealing composition at the furnace end and furnace tail, which has excellent sealing performance; a heating system adopts an internal heating sleeve, which has higher heat utilization; the cylinder body adopts a composite board of which the liner is special material, which can effectively reduce corrosion of alumina; simultaneously, the major spiral used for preventing scarring of chlorine hydride is placed in the cylinder body. The rotary calciner realizes the large scale production of producing aluminum oxide by aluminum chloride hexahydrate through calcined cracking, which greatly improves comprehensive utilization of fly ash and makes waste profitable.
Description
Technical field
The utility model relates to a kind of rotary calcining stove that is used for producing aluminium oxide, particularly a kind of hermetic corrosion resistant rotary calcining stove of producing alundum (Al with Aluminum Chloride Hexahydrate through the calcining cracking.
Technical background
China is big coal country, is the basic fuel of electrical production with coal.In recent years, the developing rapidly of China's power industry, but also brought the discharge capacity of flyash sharply to increase simultaneously, exert heavy pressures on for economic construction and ecological environment.The comprehensive utilization of flyash, turn waste into wealth, turn bane into boon, become the important means that solves the electrical production environmental pollution.Contain a large amount of silica, aluminium oxide, iron oxide, calcium oxide etc. in the flyash, with flyash and hydrochloric acid reaction, through dissolving, filtration, can obtain liquor alumini chloridi, remove sila matter wherein, condensing crystallizing can obtain Aluminum Chloride Hexahydrate, is heated cracking then, can make thick aluminium oxide.And in this process, the rotary calcining stove of heating pyrolyze Aluminum Chloride Hexahydrate is a key equipment, when the cracking Aluminum Chloride Hexahydrate owing to there is a large amount of hydrogen chloride gas to produce, it has strong corrosivity and toxicity, a large amount of water generates is arranged again simultaneously, thereby its production equipment should be corrosion-resistant, again good seal performance.
The utility model content
The utility model provides a kind of rotary calcining stove that is used for producing aluminium oxide, be used for Aluminum Chloride Hexahydrate and produce the hermetic corrosion resistant calcining furnace of alundum (Al through the calcining cracking, its have production capacity big, can produce continuously, the effect and the effect of corrosion-resistant, favorable sealing property, environmental protection.
Technical solution of the present utility model is: a kind of rotary calcining stove that is used for producing aluminium oxide, comprise cylindrical shell (16), retaining riding wheel apparatus (1), riding wheel apparatus (22), running part, feed auger conveyer (3), charging sealing (8), discharging sealing (19), discharging spiral conveyor (20) and heater, cylindrical shell (16) two ends are provided with retaining riding wheel apparatus (1) and riding wheel apparatus (22), cylindrical shell (16) is provided with rolling ring I (11) and rolling ring II (17), rolling ring I (11) and rolling ring II (17) are supported by retaining riding wheel apparatus (1) and riding wheel apparatus (22) respectively, running part comprises transmission device (2) and gear wheel (10), gear wheel (10) is arranged on the front end of cylindrical shell (16), and transmission device (2) is connected with gear wheel (10); The middle part is provided with king bolt (12) in the cylindrical shell (16), and cylindrical shell (16) afterbody is provided with copy plate (18); The feed end of cylindrical shell (16) front end is provided with feed auger conveyer (3) and charging sealing (8), feed auger conveyer (3) is connected charging sealing (8) and goes up and stretch in the cylindrical shell (16), the discharge end of cylindrical shell (16) rear end is provided with discharging spiral conveyor (20) and discharging sealing (19), and discharging spiral conveyor (20) is connected with discharging sealing (19); Heater is made of chuck (13) and chuck sealing (15), chuck (13) two ends are provided with chuck sealing (15), chuck (13) front portion is provided with a plurality of air inlets (25), chuck (13) afterbody is provided with gas outlet (14), and chuck (13) bottom is provided with many group sliding supports (23) and one group of hold-down support (24).
Gear wheel (10) on the cylindrical shell (16) and rolling ring I (11) are arranged at cylindrical shell (16) front end, and the gear wheel in the retaining riding wheel apparatus (1) keeps off respectively in rolling ring I (11) both sides.
Transmission device (2) comprises main motor (26), main gear reducer (27), main motor (26) is connected with main gear reducer (27), main motor (26) offside is provided with accessory drive motor (29), accessory drive motor (29) is connected with main gear reducer (27) by machine security clutch (28), the low speed end of main gear reducer (27) is pinion device (31), and main gear reducer (27) is connected by elastic dowel pin shaft coupling (30) with pinion device (31).
Described charging sealing (8) and discharging sealing (19) are made of following part: it comprises rotating ring (38) and stationary ring (37), rotating ring (38) is connected on the rotating ring bracing frame (39), rotating ring bracing frame (39) is connected on the front end-plate (40) of cylindrical shell (16), stationary ring (37) is installed on the stationary ring bracing frame (36), rotating ring (38) constitutes mechanical seal with stationary ring (37), be provided with tank filler sleeve (43) in stationary ring (37) both sides, end face is provided with oil groove (42), be connected with polytetrafluoroethylene (PTFE) expansion joint (35) between the pipe support (34) that connects feed auger conveyer (3) and discharging spiral conveyor (20) and the stationary ring bracing frame (36), on pipe support (34), be provided with the escape pipe (6) that is used for giving vent to anger, pipe support (34) is installed on the support (33), simultaneously on support (33), be provided with a plurality of cylinders (32) that are used for holding out against stationary ring (37), in pipe support (34), stationary ring bracing frame (36), respectively be provided with a trapezoidal sealing ring of polytetrafluoroethylene (PTFE) (41) between the rotating ring bracing frame (39).
Described chuck sealing (15) comprises chuck housing (47), pressure plates II (48), graphite packing I (49), pressure plates I (53), graphite block (54), graphite packing II (56), be provided with heat-insulation layer (46) and flame retardant coating (45) in the chuck housing (47), be lined with heat-resisting liner (44) in the flame retardant coating (45), pressure plates II (48) is connected with bolt with chuck (13), on pressure plates II (48), be provided with semicircle and dovetail groove, in half slot, be pressed into graphite packing I (49), in dovetail groove, be pressed into graphite packing II (56), the outer annular graphite block (54) of two-layer many lobes that is provided with of pressure plates II (48), its endoporus contacts with cylindrical shell sealing surface (55), the outer pressure plates I (53) that is provided with of graphite block (54), it is connected with pressure plates II (48) graphite block (54) is clipped in the middle, graphite block (54) is provided with push rod (50), is provided with between push rod (50) and graphite block (54) to be used for the spring (51) of radial compaction graphite block (54).
The utility model adopts multiple seal combination such as PTFE bellows, mechanical seal, trapezoidal PTFE at burner and stove tail, has good sealing property, insulation jacket in heating system adopts, has higher heat utilization efficiency, cylindrical shell adopts the composite plate of liner special material, can effectively alleviate the corrosion of hydrogen chloride, in cylindrical shell, place simultaneously and be used for preventing the king bolt that scabs.The utility model realized Aluminum Chloride Hexahydrate through the calcining cracking produce the production of alundum (Al large-scale, improved greatly flyash comprehensive utilization, turn waste into wealth.
The utlity model has following advantage
1) use of rotary calcining stove, realized Aluminum Chloride Hexahydrate through the calcining cracking produce the production of alundum (Al large-scale, improved greatly flyash comprehensive utilization, turn waste into wealth.
2) body barrel adopts the composite plate manufacturing of liner special material, has effectively prevented the corrosion of product hydrogen chloride to cylindrical shell.
3) adopt multiple seal combination such as PTFE bellows, mechanical seal, trapezoidal PTFE at equipment burner and stove tail, make equipment have good sealing property, reduced environmental pollution
4) motor adopts frequency control motor, can adapt under the different working conditions the rotating speed requirement.
Description of drawings
Fig. 1 is the structural representation of utility model rotary calcining stove.
Fig. 2 is the transmission structures schematic diagram.
Fig. 3 is the charging sealed structural representation.
Fig. 4 is a local B structure for amplifying schematic diagram among Fig. 3.
Fig. 5 is a local A structure for amplifying schematic diagram among Fig. 1, i.e. chuck sealing and jacket structured schematic diagram.
The specific embodiment
The utility model mainly is made up of retaining riding wheel apparatus 1, transmission device 2, feed auger conveyer 3, pusher 5, escape pipe 6, charging sealing 8, gear cover 9, gear wheel 10, rolling ring I11, king bolt 12, chuck 13, chuck sealing 15, cylindrical shell 16, rolling ring II17, discharging sealing 19, discharging spiral conveyor 20, riding wheel apparatus 22 etc.It is as follows that each several part is specifically formed structure:
The rotary calcining furnace main body is a cylindrical shell 16, is provided with to prevent the king bolt 12 that scabs in cylindrical shell 16, is provided with one group of copy plate 18 that is used for discharging at afterbody.For preventing the corrosion of product to main cylinder, cylindrical shell 16 adopts the composite plate of liner special material simultaneously.
The two ends of cylindrical shell 16 are respectively retaining riding wheel apparatus 1 and riding wheel apparatus 22, and their rolling ring I11 and rolling ring II17 on being installed in cylindrical shell 16 are used for supporting cylindrical shell 16 and Operating Weight.Retaining riding wheel apparatus 1 is made up of support roller group, catch wheel device, retaining support roller base, graphite lubrication device etc., and the enter the chocks in the retaining riding wheel apparatus 1 is controlled the axial displacement of cylindrical shell 16 on rolling ring I 11.
The running part that drives the equipment body rotation is located at the front portion of rolling ring I11, and this part comprises transmission device 2, gear wheel 10, gear cover 9.Main motor 26 offsides are provided with accessory drive motor 29 in transmission device 2, mainly when maintenance and parking, use, its with main gear reducer 27 between be connected by machine security clutch 28, the low speed end of main gear reducer 27 is a pinion device 31, its with main gear reducer 27 between elastic dowel pin shaft coupling 30 that to adopt compensate for displacement and shock-absorbing capacity good be connected.Gear wheel 10 adopts the latch plate structure, to reduce the distortion that causes owing to high temperature, to guarantee the steady of transmission.
The feed end of rotary calcining stove and discharge end are made up of feed auger conveyer 3, charging sealing 8, discharging spiral conveyor 20, discharging sealing 19 etc., and feed auger conveyer 3 is connected in the charging sealing 8 and stretches in the cylindrical shell 16.Charging sealing 8 is connected on the front end-plate 40 of cylindrical shell 16 by rotating ring bracing frame 39, rotating ring 38 is connected on the rotating ring bracing frame 39, itself and stationary ring 37 constitute mechanical seal, have tank filler sleeve 43 in stationary ring 37 both sides, end face has oil groove 42, with guarantee by the lubricating grease that lubricating system is supplied with automatically make have between stationary ring 37 and rotating ring 38 end faces good lubricated and seal, stationary ring 37 is installed on the stationary ring bracing frame 36, be connected with PTFE expansion joint 35 between the pipe support 34 that connects feed auger conveyer 3 and the stationary ring bracing frame 36, to eliminate the swell increment of being heated and producing owing to cylindrical shell 16, on pipe support 34, be equipped with the escape pipe 6 that is used for giving vent to anger, in the upper end of escape pipe 6 is gas outlet 7, its front end is provided with the pusher 5 that is used for clearing up dust, on pipe support 34 mounting brackets 33, the a plurality of cylinders 32 that are used for holding out against stationary ring 37 also are housed on support 33 simultaneously, at pipe support 34, stationary ring bracing frame 36, a trapezoidal sealing ring 41 of PTFE is respectively arranged between the rotating ring bracing frame 39, and it is moving to be used for preventing that dust from entering, between the stationary ring and in the PTFE expansion joint 35.Discharging seals 19 structures and charging and seals 8 similar.
Operation principle of the present utility model is as follows:
Drive the gear wheel 10 that is contained in cylindrical shell 16 front ends by transmission device 2 during the running of rotary calcining stove and make cylindrical shell 16 operation continuously on retaining riding wheel apparatus 1 and riding wheel apparatus 22, main motor 26 in the transmission device 2 adopts frequency control motor, can adapt under the different working conditions the rotating speed requirement.Its concrete operation principle is as follows:
The rotary calcining stove is when producing, Aluminum Chloride Hexahydrate is sent into feed auger conveyer 3 through charging aperture 4, material is sent in the cylindrical shell 16 through feed auger conveyer 3, Aluminum Chloride Hexahydrate enters calcining zone under the rotation of cylindrical shell 16, the hydrogen chloride gas and the water vapour that generate after calcining at the calcining zone Aluminum Chloride Hexahydrate enter postorder equipment through escape pipe 6, the alundum (Al that generates is sent into discharging spiral conveyor 20 through the copy plate 18 of cylindrical shell 16 afterbodys, is discharged by discharging opening 21.The king bolt 12 that is provided with in cylindrical shell 16 in this process can effectively prevent material knot wall.For prevent that the dust that hydrogen chloride gas and water vapour are taken out of from piling up in escape pipe 6, be provided with the pusher 5 that is used for clearing up dust at escape pipe 6 front ends simultaneously.
Equipment enters in the cylindrical shell 16 for the hydrogen chloride gas that prevents to generate leaks with extraneous air in running, is provided with charging sealing 8 and discharging sealing 19 in cylindrical shell 16 front and back ends.The rotating ring 38 that is connected on the rotating ring bracing frame 39 constitutes mechanical seal with stationary ring 37, between pipe support 34 and stationary ring bracing frame 36, be connected with PTFE expansion joint 35, to eliminate the swell increment of being heated and producing owing to cylindrical shell 16, a plurality of cylinders 32 are housed on support 33 simultaneously, by adjusting the pressure of cylinder 32, guarantee that rotating ring 38 closely contacts all the time with stationary ring 37, and the oil groove 42 that tank filler sleeve of opening in stationary ring 37 both sides 43 and end face are opened has guaranteed to form good lubricated and sealing by the lubricating grease that lubricating system is supplied with automatically between stationary ring 37 and rotating ring 38 end faces.The trapezoidal sealing ring of between pipe support 34, stationary ring bracing frame 36, rotating ring bracing frame 39, installing 41 of PTFE, can prevent dust enter between the dynamic and static ring and PTFE expansion joint 35 in.On the helical axis of feed auger conveyer 3 and discharging spiral conveyor 20, helical blade is disconnected, make material in conveying worm, form the material envelope, pass in and out from conveying worm to prevent hydrogen chloride gas and extraneous air.
At the thermophore of the cylindrical shell 16 outside chuck of installing 13 main carryings to the material heating, the thermophore that the warm-air supply system transports in chuck air inlet 25 enters chuck 13, thermophore by the passage between chuck 13 and the cylindrical shell 16 to cylindrical shell 16 with material heats and 14 discharge through the gas outlet.After chuck 13 is heated, since middle fixing by hold-down support 24, when being expanded, extends to two ends chuck 13 along sliding support 23.After chuck seals 15 center platen II48 and chuck 13 is connected graphite packing I 49 is pressed between pressure plates II 48 and the chuck 13, graphite packing II56 is pressed between pressure plates II 48 and chuck 13 and the cylindrical shell sealing surface 55, thereby thermophore is formed radial and axial sealing, make 51 pairs of graphite blocks of spring 54 produce radial load by adjusting push rod 50, graphite block 54 is close on the cylindrical shell sealing surface 55 all the time, form axial static and dynamic sealing, reduce thermophore and extraneous heat exchange in the chuck.
Claims (5)
1. rotary calcining stove that is used for producing aluminium oxide, comprise cylindrical shell (16), retaining riding wheel apparatus (1), riding wheel apparatus (22), running part, feed auger conveyer (3), charging sealing (8), discharging sealing (19), discharging spiral conveyor (20) and heater, cylindrical shell (16) two ends are provided with retaining riding wheel apparatus (1) and riding wheel apparatus (22), cylindrical shell (16) is provided with rolling ring I (11) and rolling ring II (17), rolling ring I (11) and rolling ring II (17) are supported by retaining riding wheel apparatus (1) and riding wheel apparatus (22) respectively, running part comprises transmission device (2) and gear wheel (10), gear wheel (10) is arranged on the front end of cylindrical shell (16), and transmission device (2) is connected with gear wheel (10); It is characterized in that: the middle part is provided with king bolt (12) in the cylindrical shell (16), and cylindrical shell (16) afterbody is provided with copy plate (18); The feed end of cylindrical shell (16) front end is provided with feed auger conveyer (3) and charging sealing (8), feed auger conveyer (3) is connected charging sealing (8) and goes up and stretch in the cylindrical shell (16), the discharge end of cylindrical shell (16) rear end is provided with discharging spiral conveyor (20) and discharging sealing (19), and discharging spiral conveyor (20) is connected with discharging sealing (19); Heater is made of chuck (13) and chuck sealing (15), chuck (13) two ends are provided with chuck sealing (15), chuck (13) front portion is provided with a plurality of air inlets (25), chuck (13) afterbody is provided with gas outlet (14), and chuck (13) bottom is provided with many group sliding supports (23) and one group of hold-down support (24).
2. a kind of rotary calcining stove that is used for producing aluminium oxide as claimed in claim 1, it is characterized in that: gear wheel (10) on the cylindrical shell (16) and rolling ring I (11) are arranged at cylindrical shell (16) front end, and the gear wheel in the retaining riding wheel apparatus (1) keeps off respectively in rolling ring I (11) both sides.
3. a kind of rotary calcining stove that is used for producing aluminium oxide as claimed in claim 1, it is characterized in that: transmission device (2) comprises main motor (26), main gear reducer (27), main motor (26) is connected with main gear reducer (27), main motor (26) offside is provided with accessory drive motor (29), accessory drive motor (29) is connected with main gear reducer (27) by machine security clutch (28), the low speed end of main gear reducer (27) is pinion device (31), and main gear reducer (27) is connected by elastic dowel pin shaft coupling (30) with pinion device (31).
4. a kind of rotary calcining stove that is used for producing aluminium oxide as claimed in claim 1, it is characterized in that: described charging sealing (8) and discharging sealing (19) are made of following part: it comprises rotating ring (38) and stationary ring (37), rotating ring (38) is connected on the rotating ring bracing frame (39), rotating ring bracing frame (39) is connected on the front end-plate (40) of cylindrical shell (16), stationary ring (37) is installed on the stationary ring bracing frame (36), rotating ring (38) constitutes mechanical seal with stationary ring (37), be provided with tank filler sleeve (43) in stationary ring (37) both sides, end face is provided with oil groove (42), be connected with polytetrafluoroethylene PTFE expansion joint (35) between the pipe support (34) that connects feed auger conveyer (3) and discharging spiral conveyor (20) and the stationary ring bracing frame (36), on pipe support (34), be provided with the escape pipe (6) that is used for giving vent to anger, pipe support (34) is installed on the support (33), simultaneously on support (33), be provided with a plurality of cylinders (32) that are used for holding out against stationary ring (37), in pipe support (34), stationary ring bracing frame (36), respectively be provided with a trapezoidal sealing ring of polytetrafluoroethylene PTFE (41) between the rotating ring bracing frame (39).
5. a kind of rotary calcining stove that is used for producing aluminium oxide as claimed in claim 1, it is characterized in that: described chuck sealing (15) is made of following part: chuck sealing (15) comprises chuck housing (47), pressure plates II (48), graphite packing I (49), pressure plates I (53), graphite block (54), graphite packing II (56), be provided with heat-insulation layer (46) and flame retardant coating (45) in the chuck housing (47), be lined with heat-resisting liner (44) in the flame retardant coating (45), pressure plates II (48) is connected with bolt with chuck (13), on pressure plates II (48), be provided with semicircle and dovetail groove, in half slot, be pressed into graphite packing I (49), in dovetail groove, be pressed into graphite packing II (56), the outer annular graphite block (54) of two-layer many lobes that is provided with of pressure plates II (48), its endoporus contacts with cylindrical shell sealing surface (55), the outer pressure plates I (53) that is provided with of graphite block (54), it is connected with pressure plates II (48) graphite block (54) is clipped in the middle, graphite block (54) is provided with push rod (50), is provided with between push rod (50) and graphite block (54) to be used for the spring (51) of radial compaction graphite block (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200344545U CN201508106U (en) | 2009-09-04 | 2009-09-04 | Rotary calciner for producing alumina |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200344545U CN201508106U (en) | 2009-09-04 | 2009-09-04 | Rotary calciner for producing alumina |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201508106U true CN201508106U (en) | 2010-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200344545U Expired - Lifetime CN201508106U (en) | 2009-09-04 | 2009-09-04 | Rotary calciner for producing alumina |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201508106U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092751A (en) * | 2010-11-19 | 2011-06-15 | 西安三瑞实业有限公司 | Method for preparing aluminum oxide and co-producing hydrochloric acid from aluminum chloride hexahydrate through pyrolytic crystallization |
| CN103629922A (en) * | 2012-08-22 | 2014-03-12 | 上海仙佳化工有限公司 | Internal combustion type high-temperature rotary furnace |
| CN104058436A (en) * | 2014-06-12 | 2014-09-24 | 北京航天动力研究所 | Device and method for preparing aluminum oxide by roasting crystalline aluminum chloride hexahydrate in rotary kiln |
| CN104229402A (en) * | 2014-09-23 | 2014-12-24 | 无锡市泰新环保科技有限公司 | Sealed material discharging pusher |
| CN106679409A (en) * | 2017-03-10 | 2017-05-17 | 北京石油化工工程有限公司 | Sealing device for rotary furnace outer heating jacket |
| CN106895413A (en) * | 2017-04-01 | 2017-06-27 | 四川英诺环保设备有限公司 | Decomposing machine |
| CN107421321A (en) * | 2017-08-25 | 2017-12-01 | 江苏凤谷节能科技有限公司 | Lithium battery powder sintering external-heating rotary kiln |
| CN109282642A (en) * | 2018-09-25 | 2019-01-29 | 西安三瑞实业有限公司 | A kind of indirect heating type rotary furnace of drying brown coal |
-
2009
- 2009-09-04 CN CN2009200344545U patent/CN201508106U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092751A (en) * | 2010-11-19 | 2011-06-15 | 西安三瑞实业有限公司 | Method for preparing aluminum oxide and co-producing hydrochloric acid from aluminum chloride hexahydrate through pyrolytic crystallization |
| CN102092751B (en) * | 2010-11-19 | 2013-04-03 | 西安三瑞实业有限公司 | Method for preparing aluminum oxide and co-producing hydrochloric acid from aluminum chloride hexahydrate through pyrolytic crystallization |
| CN103629922A (en) * | 2012-08-22 | 2014-03-12 | 上海仙佳化工有限公司 | Internal combustion type high-temperature rotary furnace |
| CN104058436A (en) * | 2014-06-12 | 2014-09-24 | 北京航天动力研究所 | Device and method for preparing aluminum oxide by roasting crystalline aluminum chloride hexahydrate in rotary kiln |
| CN104229402A (en) * | 2014-09-23 | 2014-12-24 | 无锡市泰新环保科技有限公司 | Sealed material discharging pusher |
| CN104229402B (en) * | 2014-09-23 | 2016-09-21 | 无锡市泰新环保科技有限公司 | Sealed discharging propeller |
| CN106679409A (en) * | 2017-03-10 | 2017-05-17 | 北京石油化工工程有限公司 | Sealing device for rotary furnace outer heating jacket |
| CN106895413A (en) * | 2017-04-01 | 2017-06-27 | 四川英诺环保设备有限公司 | Decomposing machine |
| CN107421321A (en) * | 2017-08-25 | 2017-12-01 | 江苏凤谷节能科技有限公司 | Lithium battery powder sintering external-heating rotary kiln |
| CN109282642A (en) * | 2018-09-25 | 2019-01-29 | 西安三瑞实业有限公司 | A kind of indirect heating type rotary furnace of drying brown coal |
| CN109282642B (en) * | 2018-09-25 | 2024-03-22 | 西安三瑞实业有限公司 | Indirect heating rotary furnace for drying lignite |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100616 |
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| CX01 | Expiry of patent term |