CN216384891U - Continuous rotary drying furnace - Google Patents
Continuous rotary drying furnace Download PDFInfo
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- CN216384891U CN216384891U CN202120807123.1U CN202120807123U CN216384891U CN 216384891 U CN216384891 U CN 216384891U CN 202120807123 U CN202120807123 U CN 202120807123U CN 216384891 U CN216384891 U CN 216384891U
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Abstract
The utility model belongs to the technical field of drying furnaces, and particularly relates to a continuous rotary drying furnace which comprises a base and a rotary furnace barrel, wherein a spiral feeding device is arranged at the front end of the barrel, a spiral discharging device is arranged at the rear end of the barrel, a bearing support is arranged below the spiral feeding device and the spiral discharging device, a front riding wheel assembly and a rear riding wheel catch wheel assembly are arranged below the barrel, a plurality of lifting blades are arranged on the inner wall of the rotary furnace barrel, a heating jacket is arranged outside the rotary furnace barrel, a heating medium pipeline is paved outside the heating jacket, a multi-channel rotary sealing device is arranged outside the spiral feeding device and the spiral discharging device, the multi-channel rotary sealing device is provided with a heating medium inlet and a heating medium outlet, a feeding port is arranged at the front part of the feeding, a discharging port is arranged at the rear part of the discharging, a protective gas inlet is arranged at the rear end of the discharging, and a waste gas discharging port is arranged at the front end of the feeding. The sealed all-weather continuous fluidized drying under the protection of nitrogen is suitable for media with harsh drying conditions, such as lithium hexafluorophosphate crystals and the like, and has the advantages of high drying efficiency, high safety factor and leakage prevention.
Description
Technical Field
The utility model belongs to the technical field of drying furnaces, and particularly relates to a continuous rotary drying furnace suitable for drying lithium hexafluorophosphate crystals.
Background
The drying oven is also called hot air drying oven, which is a material drying device commonly used in the production of food, chemical industry, feed and other industries. The method can be divided into a direct flue gas drying furnace and an indirect hot air drying furnace according to different requirements of the heating mode of the drying furnace and the cleanliness of a drying medium, and can be divided into an open continuous drying furnace (such as a tunnel type drying furnace) and a closed batch drying furnace (such as a rotary type drying furnace) according to different material drying processes.
The materials with higher cleanliness requirements are generally subjected to closed indirect heating drying equipment of a rotary drying furnace, particularly lithium hexafluorophosphate serving as a raw material for lithium battery production is subjected to deterioration reaction in the air due to the dielectric property of the lithium hexafluorophosphate, the whole production process requires that the lithium hexafluorophosphate cannot be contacted with the air, even the lithium hexafluorophosphate needs to be dried in a protective gas environment, the lithium hexafluorophosphate is toxic and is prevented from being contacted with the skin in the production process, the common production process of the lithium hexafluorophosphate is to dissolve lithium salt in anhydrous hydrofluoric acid, then phosphorus pentafluoride gas is introduced to react to produce lithium hexafluorophosphate crystals, and then the lithium hexafluorophosphate products are obtained through separation and drying.
The existing rotary drying furnace for producing lithium hexafluorophosphate is difficult to meet the drying environment requirement of lithium hexafluorophosphate crystals, the requirement on the drying environment is harsh, the existing rotary drying furnace for producing lithium hexafluorophosphate adopts a mode of putting into the drying furnace according to batches for sealing, protecting and drying, only a certain amount of materials can be dried at one time, the process operation is troublesome, residual acid in the dried lithium hexafluorophosphate is not sufficiently volatilized, the drying efficiency is low, the drying effect is not ideal, the labor intensity is high, the operation risk is high, once leakage occurs in the drying process, expensive lithium hexafluorophosphate is scrapped, the production cost is greatly wasted, and the harm to the environment is huge.
SUMMERY OF THE UTILITY MODEL
Aiming at the situation, the utility model designs the continuous rotary drying furnace, which can realize the sealed continuous fluidized drying of the lithium hexafluorophosphate crystal.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a continuous rotary drying furnace comprises a base and a rotary furnace barrel which is rotatably erected on the base, wherein a spiral feeding device is arranged at the front end of the rotary furnace barrel, a spiral discharging device is arranged at the rear end of the rotary furnace barrel, a feeding end bearing support is arranged below the spiral feeding device, a discharging end bearing support is arranged below the spiral discharging device, a front riding wheel assembly and a rear riding wheel catch wheel assembly are arranged below the rotary furnace barrel, a rotary driving device is arranged at the front side of the rear riding wheel catch wheel assembly, a feeding transmission device is arranged at one side of the spiral feeding device, a discharging transmission device is arranged at one side of the spiral discharging device, a plurality of lifting blades are distributed on the inner wall of the rotary furnace barrel, a heating jacket is arranged at the outer side of the rotary furnace barrel, a heat medium pipeline is laid at the outer side of the heating jacket in a matched manner, and a feeding end multi-channel rotary sealing device is arranged at the outer side of the spiral feeding device, the spiral discharging device is characterized in that a heat medium inlet is formed in the feeding end multichannel rotary sealing device, a discharging end multichannel rotary sealing device is arranged on the outer side of the spiral discharging device, a heat medium outlet is formed in the discharging end multichannel rotary sealing device, a feeding hole is formed in the front portion of the spiral discharging device, a discharging hole is formed in the rear portion of the spiral discharging device, a protective gas inlet is formed in the rear end of the spiral discharging device, and a waste gas discharging port is formed in the front end of the spiral discharging device.
Furthermore, the rotary furnace cylinder is of a three-section butt joint combined structure, and the sections of the rotary furnace cylinder are fixedly connected with the front end cover and the rear end cover through bolt flange structures.
Furthermore, the heating jacket comprises three sections of jackets which are separately arranged at the outer side of each section of the rotary furnace cylinder, the three sections of jackets are communicated with each other through the heat medium pipeline, the water inlet end and the water outlet end of the heat medium pipeline are respectively and correspondingly connected with the heat medium inlet and the heat medium outlet, and the heating temperature of the heating jacket is independently controlled in three sections.
Furthermore, the inner wall of the rotary furnace cylinder body, the lifting plates, all parts in the spiral feeding device and the spiral discharging device, which are in contact with the material to be dried, are made of 316L stainless steel, so that the corrosion resistance is high, and the service life of the equipment is prolonged.
Furthermore, the two ends of the rotary furnace cylinder are also provided with an overhaul manhole, so that the emergency overhaul and the regular cleaning operation in the rotary furnace cylinder are facilitated.
Further, the material to be dried is lithium hexafluorophosphate crystals, and the residual acid in the lithium hexafluorophosphate crystals is volatilized and released more fully by the rotary furnace cylinder in the continuous production mode.
Furthermore, the heating medium adopted by the heating jacket is hot water, and the drying temperature in the rotary furnace cylinder can be controlled to be 70-80 ℃.
Furthermore, nitrogen is introduced into the protective gas inlet, and the reversely-introduced nitrogen is heated in the rotary furnace cylinder to form hot air so as to dry the materials to be dried.
Further, spiral feed arrangement includes feedstock channel, and feedstock channel's inside is supported sealed and the feeding supports the bearing assembly and rotationally is provided with feeding hollow screw rod through the feeding, spiral discharge arrangement includes discharging channel, and discharging channel's inside is supported sealed and discharging supports the bearing assembly and rotationally is provided with ejection of compact hollow screw rod through the ejection of compact, and the material receiving mouth has been seted up to discharging channel front end lateral wall top, and the material receiving mouth circumference is the vortex and has laid a plurality of and hold together the flitch.
Furthermore, the feeding end multichannel rotary sealing device and the discharging end multichannel rotary sealing device both comprise a transition flange assembly, an end shaft joint and an outer sleeve rotary sealing assembly, one end of the end shaft joint is fixedly connected with the front end or the rear end of the rotary furnace cylinder body through the transition flange assembly, and the other end of the end shaft joint is rotatably and hermetically connected with the feeding channel or the discharging channel through the outer sleeve rotary sealing assembly.
The present invention also includes other components that enable its normal use, all by conventional means in the art, and further, devices or components not limited by the present invention, such as: a rotary driving device, a bearing support at a feeding end and a discharging end, a front supporting wheel assembly, a rear supporting wheel catch wheel assembly, a material raising plate, a bolt flange structure of a sectional cylinder, a temperature control system of a heating jacket and the like of the rotary drying furnace all adopt the prior art in the field.
The utility model has the following beneficial effects:
the continuous rotary drying furnace provided by the utility model has the advantages that through reasonable structural design, the rotary furnace can carry out sealed all-weather continuous fluidized drying in a drying environment with introduced protective gas, the operation mode that the traditional rotary drying furnace can only feed and discharge materials quantitatively according to batches is changed, the continuous rotary drying furnace is suitable for media which are strong in corrosivity, toxic, harmful and harsh in drying conditions, such as lithium hexafluorophosphate crystals and the like, the equipment drying efficiency is greatly improved, the materials are dried more fully, the labor intensity of workers is reduced, the safety coefficient of the production process is high, the service life of the equipment is long, the problems of material scrapping, personnel poisoning, environmental pollution and the like caused by leakage in the drying process are avoided, the production cost waste is reduced, and the production benefit of enterprises is improved.
Drawings
FIG. 1 is a schematic structural diagram of a continuous rotary drying oven according to an embodiment.
Fig. 2 is a schematic top view of the structure of fig. 1.
Fig. 3 is a schematic cross-sectional view taken along line a-a of fig. 2.
Fig. 4 is a schematic sectional view taken along line G-G in fig. 1.
Fig. 5 is a schematic structural view of the screw feeder of fig. 3.
Fig. 6 is a schematic structural diagram of the spiral discharging device in fig. 3.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only partial embodiments, and not all embodiments.
It should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate the orientations and positional relationships based on the structures shown in the drawings, and are only for convenience of description.
Examples
As shown in fig. 1-6, a continuous rotary drying furnace comprises a base 1 and a rotary furnace cylinder 2 rotatably mounted on the base, wherein a spiral feeding device 3 is arranged at the front end of the rotary furnace cylinder, a spiral discharging device 4 is arranged at the rear end of the rotary furnace cylinder, a feeding end bearing support 5 is arranged below the spiral feeding device, a discharging end bearing support 6 is arranged below the spiral discharging device, a front riding wheel assembly 7 and a rear riding wheel catch wheel assembly 8 are arranged below the rotary furnace cylinder, a rotary driving device 9 is arranged at the front side of the rear riding wheel catch wheel assembly, a feeding transmission device 10 is arranged at one side of the spiral feeding device, a discharging transmission device 11 is arranged at one side of the spiral discharging device, a plurality of material raising plates 12 are arranged on the inner wall of the rotary furnace cylinder, a heating jacket 13 is arranged at the outer side of the rotary furnace cylinder, a heating medium pipeline 14 is arranged at the outer side of the heating jacket in a matching manner, the spiral feed device outside is provided with feed end multichannel rotary seal device 15, be provided with heat medium import 16 on the feed end multichannel rotary seal device, the spiral discharging device outside is provided with discharge end multichannel rotary seal device 17, be provided with heat medium export 18 on the discharge end multichannel rotary seal device, spiral feed device front portion is provided with feed inlet 19, spiral discharging device rear portion is provided with discharge gate 20, spiral discharging device rear end is provided with protection gas entry 21, the spiral feed device front end is provided with exhaust port 22.
The rotary furnace barrel is of a three-section butt joint combined structure, the sections of the rotary furnace barrel are fixedly connected through bolt flange structures 23, the rotary furnace barrel is a low-rotation-speed horizontal barrel with the rotation speed of 1-2 r/min, the problem of height of a factory building is solved, and cost investment is reduced.
The heating jacket comprises three sections of jackets which are separately arranged on the outer side of each section of the rotary furnace cylinder, the three sections of jackets are communicated with each other through the heat medium pipeline, the water inlet end and the water outlet end of the heat medium pipeline are respectively and correspondingly connected with the heat medium inlet and the heat medium outlet, and the heating temperature of the heating jacket is independently controlled in three sections, so that the lithium hexafluorophosphate crystal in the cylinder obtains the most appropriate residual acid volatilization temperature.
The rotary furnace barrel inner wall and each lifting blade, and all parts that spiral feed arrangement and spiral discharging device are inside to contact with the material of treating drying all adopt 316L stainless steel material, and corrosion resistance is strong, is favorable to reducing maintenance frequency, increase of service life guarantees the cleanliness factor of dry material.
The rotary furnace barrel both ends are provided with the maintenance manhole 24, the inside clearance of overhauing of rotary furnace barrel of being convenient for.
The material to be dried is lithium hexafluorophosphate crystal, the rotary furnace barrel is in the continuous production mode, so that residual acid in the lithium hexafluorophosphate crystal can be fully volatilized and released, the drying is more thorough, the condition of frequent shutdown of batch feeding and discharging is avoided, and the drying efficiency is improved.
The heating jacket adopts hot water as a heating medium, the internal drying temperature of the rotary furnace barrel can be controlled to be 70-80 ℃, and under the rotation of the horizontal barrel and the turning and conveying effects of the inclined material raising plate inside the horizontal barrel, the material to be dried slowly moves from the feeding end to the discharging end, so that uninterrupted continuous production can be realized, and the traditional batch quantitative feeding and discharging mode is changed.
The protective gas inlet is filled with nitrogen, the reversely-fed nitrogen is heated in the rotary furnace cylinder to form hot air, and after the materials to be dried are dried, the hot air and volatile components generated in the material drying process are discharged from the waste gas discharge port.
Spiral feed arrangement includes pipe form feedstock channel 25, and feedstock channel's inside is supported sealed 26 and feeding and is supported bearing assembly 27 and rotationally be provided with feeding hollow screw rod 28 through the feeding, spiral discharge arrangement includes pipe form feedstock channel 29, and feedstock channel's inside is supported sealed 30 and ejection of compact and is supported bearing assembly 31 and rotationally be provided with ejection of compact hollow screw rod 32 through the ejection of compact, and receiving port 33 has been seted up to feedstock channel front end lateral wall top, and the receiving port circumference is the vortex form and has laid a plurality of and hold together flitch 34, under the continuous pivoted condition of rotary furnace barrel, realizes totally closed continuous business turn over material.
The multi-channel rotary sealing device at the feeding end and the multi-channel rotary sealing device at the discharging end respectively comprise a transition flange assembly 35, an end shaft joint 36 and an outer sleeve rotary sealing 37 assembly, one end of the end shaft joint is fixedly connected with the front end or the rear end of the rotary furnace cylinder body through the transition flange assembly, the other end of the end shaft joint is rotatably and hermetically connected with the feeding channel or the discharging channel through the outer sleeve rotary sealing assembly, and the technical problem that multiple media of dried materials, heated hot water, protected nitrogen and volatile waste gas are mutually matched and do not interfere with each other in the same rotary drying furnace is solved.
The action principle of the utility model is as follows:
according to the continuous rotary drying furnace provided by the utility model, lithium hexafluorophosphate crystals are placed in a rotary furnace cylinder at a low rotating speed of 1-2 r/min, the raising plate is used for continuously raising the lithium hexafluorophosphate crystals and slowly moving the lithium hexafluorophosphate crystals to the discharging end, so that the residual acid in the lithium hexafluorophosphate crystals has sufficient volatilization time, and the spiral feeding and discharging device realizes the full-closed continuous feeding and discharging of the rotary furnace cylinder; the multi-medium and multi-channel rotary sealing device enables the rotary furnace cylinder to adopt a structure that jacket hot water is heated and matched with the cylinder in a three-section butt joint combination mode, so that the internal temperature of the rotary furnace cylinder can be 70-80 ℃, three-section temperature control can be realized, and lithium hexafluorophosphate crystals in the cylinder can obtain the most appropriate residual acid volatilization temperature. Adopt the reverse air inlet mode of protective gas nitrogen gas for the lithium hexafluorophosphate crystal that discharge end residual acid content is minimum obtains comparatively clean nitrogen gas, lithium hexafluorophosphate crystal residual acid content that is about to the ejection of compact is lower, nitrogen gas coming from the discharge end produces little negative pressure under the effect of feed end suction residual acid waste gas and makes nitrogen gas flow direction feed end, nitrogen gas coming from the ejection of compact constantly absorbs the residual acid at the in-process that flows to the feed end and obtains saturation gradually and discharge from the feed end, make lithium hexafluorophosphate crystal obtain even abundant drying.
The technical solution of the present invention is not limited to the above-described specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments, and any technical modifications within the spirit and principle of the present invention fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a continuous rotation drying furnace, includes that basic base and rotatable the erects rotary furnace barrel on the basic base, its characterized in that: the rotary furnace comprises a rotary furnace barrel, a spiral feeding device is arranged at the front end of the rotary furnace barrel, a spiral discharging device is arranged at the rear end of the rotary furnace barrel, a feeding end bearing support is arranged below the spiral feeding device, a discharging end bearing support is arranged below the spiral discharging device, a front supporting wheel assembly and a rear supporting wheel catch wheel assembly are arranged below the rotary furnace barrel, a rotary driving device is arranged at the front side of the rear supporting wheel catch wheel assembly, a feeding transmission device is arranged at one side of the spiral feeding device, a discharging transmission device is arranged at one side of the spiral discharging device, a plurality of lifting blades are distributed on the inner wall of the rotary furnace barrel, a heating jacket is arranged at the outer side of the rotary furnace barrel, a heating medium pipeline is distributed at the outer side of the heating jacket in a matched mode, a feeding end multi-channel rotary sealing device is arranged at the outer side of the spiral feeding device, and a heating medium inlet is arranged on the feeding end multi-channel rotary sealing device, the spiral discharging device outside is provided with discharge end multichannel rotary seal device, be provided with the heat medium export on the discharge end multichannel rotary seal device, spiral feeding device front portion is provided with the feed inlet, spiral discharging device rear portion is provided with the discharge gate, spiral discharging device rear end is provided with the protective gas entry, the spiral feeding device front end is provided with exhaust outlet.
2. The continuous rotary drying oven according to claim 1, wherein: the rotary furnace barrel is of a three-section butt joint combined structure, and the sections of the rotary furnace barrel are fixedly connected with one another and fixedly connected with the front end cover and the rear end cover through bolt flange structures.
3. The continuous rotary drying oven according to claim 2, wherein: the heating jacket comprises three sections of jackets which are separately arranged on the outer side of each section of the rotary furnace cylinder, the three sections of jackets are communicated with each other through the heat medium pipeline, the water inlet end and the water outlet end of the heat medium pipeline are respectively and correspondingly connected with the heat medium inlet and the heat medium outlet, and the heating temperature of the heating jacket is independently controlled in three sections.
4. The continuous rotary drying oven according to claim 1, wherein: the inner wall of the rotary furnace cylinder body, the lifting blades, and all parts in the spiral feeding device and the spiral discharging device, which are contacted with the material to be dried, are made of 316L stainless steel.
5. The continuous rotary drying oven according to claim 1, wherein: and the two ends of the rotary furnace cylinder are also provided with maintenance manholes.
6. The continuous rotary drying oven according to claim 4, wherein: the material to be dried is lithium hexafluorophosphate crystal.
7. The continuous rotary drying oven according to claim 1, wherein: the heating medium adopted by the heating jacket is hot water.
8. The continuous rotary drying oven according to claim 1, wherein: the protective gas inlet is filled with nitrogen.
9. The continuous rotary drying oven according to claim 1, wherein: spiral feed arrangement includes feedstock channel, and feedstock channel's inside is supported sealedly and the feeding supports the bearing assembly rotationally to be provided with feeding hollow screw rod through the feeding, spiral discharging device includes discharging channel, and discharging channel's inside is supported sealedly and discharging supports the bearing assembly rotationally to be provided with discharging hollow screw rod through the ejection of compact, and discharging channel front end lateral wall top has been seted up and has been received the material mouth, and it is the vortex form to receive the material mouth circumference and has been laid a plurality of and hold together the flitch.
10. The continuous rotary drying oven according to claim 9, wherein: the feeding end multichannel rotary sealing device and the discharging end multichannel rotary sealing device respectively comprise a transition flange assembly, an end shaft joint and an outer sleeve rotary sealing assembly, one end of the end shaft joint is fixedly connected with the front end or the rear end of the rotary furnace cylinder body through the transition flange assembly, and the other end of the end shaft joint is rotatably and hermetically connected with the feeding channel or the discharging channel through the outer sleeve rotary sealing assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120807123.1U CN216384891U (en) | 2021-04-20 | 2021-04-20 | Continuous rotary drying furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120807123.1U CN216384891U (en) | 2021-04-20 | 2021-04-20 | Continuous rotary drying furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216384891U true CN216384891U (en) | 2022-04-26 |
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ID=81216174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120807123.1U Active CN216384891U (en) | 2021-04-20 | 2021-04-20 | Continuous rotary drying furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216384891U (en) |
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2021
- 2021-04-20 CN CN202120807123.1U patent/CN216384891U/en active Active
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