CN108413737A - A kind of drying device - Google Patents
A kind of drying device Download PDFInfo
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- CN108413737A CN108413737A CN201810178863.6A CN201810178863A CN108413737A CN 108413737 A CN108413737 A CN 108413737A CN 201810178863 A CN201810178863 A CN 201810178863A CN 108413737 A CN108413737 A CN 108413737A
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- 238000001035 drying Methods 0.000 title claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 119
- 238000003756 stirring Methods 0.000 claims description 155
- 238000009423 ventilation Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 15
- 239000002245 particle Substances 0.000 abstract description 9
- 238000013022 venting Methods 0.000 abstract 2
- 238000005096 rolling process Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000010802 sludge Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000005156 Dehydration Diseases 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/04—Agitating, stirring, or scraping devices
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention discloses a kind of drying device, including furnace body, for to the charging gear that material is added in furnace body, material-receiving device for collecting the material in furnace body after drying, wind apparatus, and the agitating device for being stirred and crushing to material will be given by the first air inlet in extraneous hot gas introducing furnace body.Wherein, agitating device includes shaft, is threaded through in the cavity of the furnace body, and the shaft has venting cavity, several puff prots are provided on the venting cavity, the jet direction of the puff prot and the mixing direction of the mixing direction of the agitating shaft and the blade are misaligned not parallel；When to dry materials, hot gas is introduced through the first air inlet in furnace body cavity, shaft rotation drives the agitating device in shaft constantly to be stirred to material along the radial and axial of shaft, enable material in furnace body along the axially and radially rolling of shaft, increase the time that material is stirred, increases the area of material and hot gas heat convection.In addition, crushing material can also be formed the smaller material of particle, further increases the area of material and hot gas heat convection, improve the drying efficiency and drying effect of material by agitating device.
Description
The scheme is a divisional application taking the following cases as parent cases: the patent application numbers are: 201511017194.7, the name of the patent application: a drying apparatus, as claimed in the patent application: wandango, application date: 12 and 30 days 2015.
Technical Field
The invention relates to the technical field of heating and drying, in particular to a drying system.
Background
The sludge is a product in the sewage treatment process, contains a large amount of organic matters, heavy metals, mold fungi and the like, and can cause serious pollution to the environment if subsequent treatment is not carried out, so the sludge is often subjected to concentration and dehydration treatment, but the water content of the treated sludge is usually over 70 percent, and the sludge needs to be further dried.
The drying system adopted for drying the sludge in the prior art is mostly as the drying system disclosed in Chinese patent document CN201058838Y, and comprises a furnace body, a feeding machine connected with a feeding hole of the furnace body, and a spray tower connected with an air outlet of the furnace body. Wherein, the furnace body is including setting up the transmission shaft in the furnace body, sets up on the transmission shaft outer wall and a plurality of hollow blade of radial extension for form the high temperature environment in the furnace body through letting in high-temperature gas to hollow blade and furnace body outer wall heating in to the transmission shaft. In the drying process of the material, the material is positioned in a cavity formed by the inner wall of the furnace body, the transmission shaft and the outer wall of the paddle, and the paddle stirs the material along the rotating direction of the transmission shaft under the rotation of the transmission shaft, so that the material is turned over in the cavity and carries out heat convection with the outer wall of the paddle, the outer wall of the transmission shaft and the inner wall of the furnace body.
However, in the drying system, the materials are always stirred by the blades of the transmission shaft in the same direction and roll along the same direction, so that on one hand, the heat transfer effect in the later period is reduced, the time interval between the stirring of the materials is long, and the materials cannot be fully stirred; on the other hand, to some great materials of humidity, roll along same direction and can cause bonding between the material, influence the bulk degree of material, be unfavorable for the convection heat transfer, lead to heat exchange efficiency low, drying effect is not good.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defects of low drying efficiency and poor drying effect of the drying system in the prior art, so as to provide a drying system capable of improving drying efficiency and drying effect.
To this end, the invention provides a drying device comprising
The furnace body is arranged along the horizontal direction and is provided with a cavity, a feeding hole and a discharging hole, wherein the feeding hole is used for feeding and taking out materials; the first air inlet and the first air outlet are used for supplying heat gas to flow in and out;
the feeding device is used for feeding materials into the furnace body;
the material receiving device is used for collecting the dried materials in the furnace body;
stirring device comprising
The rotating shaft is arranged in the cavity of the furnace body in a penetrating mode and provided with a ventilation cavity, a plurality of air nozzles are arranged on the ventilation cavity, and the air injection directions of the air nozzles are not parallel to the stirring direction of the stirring shaft and the stirring direction of the blades in a coincident mode;
the stirring shafts are arranged on the outer wall of the rotating shaft, extend towards the radial direction of the rotating shaft and are distributed along the axial outer wall of the rotating shaft;
the stirring shaft is provided with a plurality of blades, the blades are obliquely arranged on the stirring shaft, and the distance between every two adjacent blades is not more than 30 mm.
In the drying device, the blades are movably arranged on the stirring shaft, and the stirring device further comprises a locking member for locking the blades at the required positions on the stirring shaft.
In the drying device, the plurality of stirring shafts are distributed on the plurality of circumferential surfaces of the rotating shaft which are arranged at intervals, and at least one stirring shaft is distributed on each circumferential surface of the rotating shaft.
In the drying device, the stirring shafts on the adjacent circumferential surfaces are positioned on different vertical surfaces.
In the drying device, the number of the stirring shafts is at least four, the four stirring shafts are respectively arranged on four circumferential surfaces of the rotating shaft, and the four stirring shafts are respectively and sequentially arranged on the outer wall of the top of the rotating shaft in the Z-axis direction, the outer wall of the front part of the rotating shaft in the Y-axis direction, the outer wall of the rear part of the rotating shaft in the Y-axis direction and the outer wall of the bottom of the rotating shaft in the Z-axis direction.
In the drying device, the angle of the blades obliquely arranged on the stirring shaft is greater than 0 degree and less than or equal to 20 degrees; the distance between the edge of one side of the blade close to the inner wall of the furnace body and the inner wall of the furnace body is 0.5-10 cm.
In the drying device, the air supply device is a hot blast stove, and an air outlet of the hot blast stove is connected to the first air inlet through a second pipeline.
The drying device further comprises an air distribution device, wherein an air outlet of the air distribution device is connected to the second pipeline and used for introducing outside air into the second pipeline and mixing the outside air with hot air in the second pipeline.
The drying device also comprises a dust removal device, wherein the dust removal device comprises a cyclone, and the cyclone is provided with a second air inlet, a second air outlet and a third air outlet;
the second gas inlet is connected to the first gas outlet and is used for introducing gas in the furnace body into the cyclone cylinder and removing dust from the introduced gas;
the second gas outlet is communicated with the outside and used for discharging the dedusted gas;
and the third gas outlet is communicated with the cavity of the air supply device through a first pipeline and is used for mixing the dedusted gas with the hot gas in the air supply device to form the hot gas with required water content.
The technical scheme provided by the invention has the following advantages:
1. the invention provides a drying device which comprises a furnace body, wherein the furnace body is provided with a feeding hole, a discharging hole, a first air inlet and a first air outlet; the stirring device comprises a rotating shaft, a stirring device and a stirring device, wherein the rotating shaft is arranged in a cavity of the furnace body in a penetrating manner, the rotating shaft is provided with a ventilation cavity, the ventilation cavity is provided with a plurality of air nozzles, and the air injection direction of the air nozzles is not parallel to the stirring direction of the stirring shaft and the stirring direction of the blades; the stirring shafts are arranged on the outer wall of the rotating shaft, extend towards the radial direction of the rotating shaft and are distributed along the axial outer wall of the rotating shaft; the stirring shaft is provided with a plurality of blades, the blades are obliquely arranged on the stirring shaft, and the distance between every two adjacent blades is not more than 30 mm.
When the drying device dries materials, the feeding device adds the materials into a cavity of a furnace body through a feeding hole, meanwhile, the rotating shaft rotates to drive the stirring device on the rotating shaft to continuously stir the materials in the radial direction and the axial direction of the rotating shaft, the stirring device comprises a stirring shaft arranged on the outer wall of the rotating shaft, the stirring shaft extends towards the radial direction of the rotating shaft, and the stirring shafts are distributed along the axial outer wall of the rotating shaft; and a plurality of blades which are obliquely arranged on the stirring shaft. Under the pivot rotates, (mixing) shaft and blade all rotate along with the pivot, and a plurality of (mixing) shafts and blade stir the material in the axial of pivot and radial simultaneously to at the stirring in-process, the material can be smashed to the blade, and can throw the material to the cavity of furnace body in, make the material not only roll in the furnace body, can also move in the furnace body cavity, increase material and cavity hot air's convection and heat transfer area, thereby improve heat exchange efficiency. The aeration cavity is provided with a plurality of air nozzles, and the air injection direction of the air nozzles is not coincident with the stirring direction of the stirring shaft and the stirring direction of the blades and is not parallel, so that the stirring dimension is increased, and the condition that materials are stirred in one direction only and are bonded together to influence the loosening degree of the materials is avoided; in addition, the stirring device can also crush the materials while stirring the materials to form materials with smaller particles, so that the area of convective heat exchange between the materials and hot gas is further increased, and the drying efficiency of the materials is improved; after being dried, the belt material falls on the material receiving device through the discharge hole and is conveyed away.
2. According to the drying device provided by the invention, the blades are movably arranged on the stirring shaft, and the stirring device further comprises a locking piece for locking the blades at a required position on the stirring shaft. The blade removes on the (mixing) shaft, adjusts the clearance between blade and the furnace body inner wall to change the blade and stir and smash the effect to the material, and the material is driven down by the blade, at furnace body motion state, thereby confirm the dwell time of material in the furnace body, satisfy the dry demand of different materials.
3. The drying device provided by the invention is characterized in that a plurality of stirring shafts are distributed on a plurality of circumferential surfaces of the rotating shaft which are arranged at intervals, and at least one stirring shaft is distributed on each circumferential surface of the rotating shaft. When the pivot rotated, the pivot drove the (mixing) shaft on a plurality of periphery and the blade on it stirs and smashes the material, and the material that lies in on the pivot axial direction can both be stirred and smash by (mixing) shaft and blade on the periphery of relevant position department pivot, ensures that the material homoenergetic in the furnace body can be stirred and smashed by the blade to stirring and kibbling effect are more even, improve dry effect of material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a top plan view of a schematic construction of one embodiment of the drying system provided in example 1;
fig. 2 is a schematic structural view of a furnace body in the drying system provided in embodiment 1;
FIG. 3 is a right side view of the furnace block schematic provided in FIG. 2;
the reference numbers in the figures illustrate: 1-furnace body; 11-a feed inlet; 12-a discharge hole; 13-a first air inlet; 14-a first air outlet; 2-a feeding device; 3-a material receiving device; 4-air supply device; 5-a rotating shaft; 6-stirring shaft; 7-a blade; 8-a locking member; 9-a dust removal device; 91-a second air inlet; 92-a third outlet; 10-a first conduit; 15-air distribution devices; 16-second conduit.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Referring to FIG. 1, the present embodiment provides a drying system including
The furnace body 1 is arranged along the horizontal direction and is provided with a cavity, a feeding hole 11 for feeding and taking out materials and a discharging hole 12; a first gas inlet 13 and a first gas outlet 14 for the inflow and outflow of the heat supply gas;
the feeding device 2 is used for feeding materials into the furnace body 1;
the material receiving device 3 is used for collecting the dried materials in the furnace body 1;
the stirring device is used for stirring and crushing the materials; wherein,
the stirring device comprises
The rotating shaft 5 is arranged in the cavity of the furnace body 1 in a penetrating mode, the rotating shaft 5 is provided with a ventilation cavity, a plurality of air nozzles are arranged on the ventilation cavity, and the air injection directions of the air nozzles are not parallel to the stirring direction of the stirring shaft 6 and the stirring direction of the blades 7 in a coincident mode;
the stirring shafts 6 are arranged on the outer wall of the rotating shaft 5, extend towards the radial direction of the rotating shaft 5 and are distributed along the axial outer wall of the rotating shaft 5;
the stirring shaft 6 is obliquely arranged on the stirring shaft, and the distance between every two adjacent blades 7 is not more than 30 mm.
The invention provides a drying device which comprises a furnace body, wherein the furnace body is provided with a feeding hole, a discharging hole, a first air inlet and a first air outlet; the stirring device comprises a rotating shaft, a stirring device and a stirring device, wherein the rotating shaft is arranged in a cavity of the furnace body in a penetrating manner, the rotating shaft is provided with a ventilation cavity, the ventilation cavity is provided with a plurality of air nozzles, and the air injection direction of the air nozzles is not parallel to the stirring direction of the stirring shaft and the stirring direction of the blades; the stirring shafts are arranged on the outer wall of the rotating shaft, extend towards the radial direction of the rotating shaft and are distributed along the axial outer wall of the rotating shaft; the stirring shaft is provided with a plurality of blades, the blades are obliquely arranged on the stirring shaft, and the distance between every two adjacent blades is not more than 30 mm.
When the drying device dries materials, the feeding device adds the materials into a cavity of a furnace body through a feeding hole, meanwhile, the rotating shaft rotates to drive the stirring device on the rotating shaft to continuously stir the materials in the radial direction and the axial direction of the rotating shaft, the stirring device comprises a stirring shaft arranged on the outer wall of the rotating shaft, the stirring shaft extends towards the radial direction of the rotating shaft, and the stirring shafts are distributed along the axial outer wall of the rotating shaft; and a plurality of blades which are obliquely arranged on the stirring shaft. Under the pivot rotates, (mixing) shaft and blade all rotate along with the pivot, and a plurality of (mixing) shafts and blade stir the material in the axial of pivot and radial simultaneously to at the stirring in-process, the material can be smashed to the blade, and can throw the material to the cavity of furnace body in, make the material not only roll in the furnace body, can also move in the furnace body cavity, increase material and cavity hot air's convection and heat transfer area, thereby improve heat exchange efficiency. The aeration cavity is provided with a plurality of air nozzles, and the air injection direction of the air nozzles is not coincident with the stirring direction of the stirring shaft and the stirring direction of the blades and is not parallel, so that the stirring dimension is increased, and the condition that materials are stirred in one direction only and are bonded together to influence the loosening degree of the materials is avoided; in addition, the stirring device can also crush the materials while stirring the materials to form materials with smaller particles, so that the area of convective heat exchange between the materials and hot gas is further increased, and the drying efficiency of the materials is improved; after being dried, the belt material falls on the material receiving device through the discharge hole and is conveyed away.
As a further preferred embodiment, the angle at which the blades 7 are obliquely arranged on the outer wall of the stirring shaft 6 is greater than 0 ° and less than or equal to 20 °. For example, the blades 7 are inclined at angles of 1 °, 3 °, 5 °, 7 °, 10 °, 12 °, 15 °, 20 °, etc. on the stirring shaft 6, and the blades 7 inclined on the stirring shaft 6 not only have a stirring function but also have a function of crushing the material. Considering the stirring and crushing functions of the materials together, it is further preferable that the blades 7 are inclined by 5-10 degrees on the stirring shaft 6, and the inclination angle of the blades 7 on the stirring shaft 6 is generally not more than 20 degrees, otherwise the stirring effect of the blades 7 on the materials is weakened.
As a further preferred embodiment, the blades 7 are movably arranged on the stirring axle 6, and the stirring device further comprises locking means 8 for locking the blades 7 at a desired position on the stirring axle 6. The blade 7 moves on the stirring shaft 6, and the clearance between the blade 7 and the inner wall of the furnace body 1 is adjusted to change the stirring and crushing effects of the blade 7 on the material, and the material is driven by the blade 7 to move in the furnace body 1, so that the retention time of the material in the furnace body 1 is determined, and the drying requirements of different materials are met.
For example, some material particles are smaller, the stirring shaft 6 and the blades 7 mainly play a role in stirring in the drying process, and the distance between the blades 7 and the inner wall of the furnace body 1 can be increased, so that more space is provided for the material to move and roll in the furnace body 1 in the process of being driven by the blades 7, and the material exchanges heat with hot gas in the cavity of the furnace body 1. On the contrary, if some material particles are big, need smash the material when the stirring for drying efficiency reduces the dwell time of material in furnace body 1, just can adjust the interval between blade 7 and the furnace body 1 inner wall for a short time, strengthens blade 7's crushing effect.
In a more preferable embodiment, when the radius of the furnace body 1 is 30-40 cm, the distance between the edge of the blade 7 close to the inner wall of the furnace body 1 and the inner wall of the furnace body 1 is set to be in the range of 0.5-10 cm, for example, 0.5 cm, 1 cm, 2 cm, 3 cm, 5 cm, 8 cm, 10 cm, etc., so that a reserved space is formed between the edge of the blade 7 and the inner wall of the furnace body 1. The more preferable range is 4-5 cm, but it is actually determined according to the material properties, drying requirements and other parameters.
As a preferred embodiment of the movable arrangement of the blades 7 on the stirring shaft 6, the blades 7 are plates, the stirring shaft 6 is provided with a sliding groove along the axial direction, the blades 7 are directly inserted into the sliding groove, and when the blades 7 slide to the required position and incline at the required angle, the blades 7 are directly locked on the stirring shaft 6 by a locking member 8, such as a nut or a pin or an insert. That is, the blades 7 are installed in the chute of the agitating shaft 6 obliquely. As a variant, the blades 7 may also be plates with a central through hole, the outer wall of the stirring shaft 6 has an external thread, and the blades 7 are sleeved on the stirring shaft 6 and fixed by locking members 8, such as nuts, pins, etc. In addition, other sliding devices or upgrading devices in the prior art can be used to move the blades 7 on the stirring shaft 6 and further to fix the blades by the locking member 8.
In a preferred embodiment, the plurality of stirring shafts 6 are distributed on a plurality of circumferential surfaces of the rotating shaft 5, which are arranged at intervals, and at least one stirring shaft 6 is distributed on each circumferential surface of the rotating shaft 5. When the rotating shaft 5 rotates, the rotating shaft 5 drives the stirring shafts 6 on the plurality of circumferential surfaces and the blades 7 on the stirring shafts to stir and crush materials, the materials positioned in the axial direction of the rotating shaft 5 can be stirred and crushed by the stirring shafts 6 and the blades 7 on the circumferential surfaces of the rotating shaft 5 at corresponding positions, the materials in the furnace body 1 can be stirred and crushed by the blades 7, the stirring and crushing effects are more uniform, and the drying effect of the materials is improved.
The number of the stirring shafts 6 arranged on each circumferential surface is preferably four, and the four stirring shafts 6 are respectively positioned at the quartering points of the circumferential surface, so that the materials positioned at the same position are continuously stirred and crushed by the four stirring shafts 6 on the circumferential surface and the blades 7 on the stirring shafts 6 at the corresponding positions, the stirring interval time is shorter, the contact area of the materials and hot gas is increased, and the drying efficiency of the materials is further improved. The number of the stirring shafts 6 on each circumferential surface can be five, six, seven, eight and the like besides four, and optimally, the stirring shafts 6 are uniformly distributed at the equally divided points of the circumferential surface.
In a further preferred embodiment, the plurality of stirring shafts 6 are distributed on a plurality of circumferential surfaces of the rotating shaft 5, which are arranged at intervals, and the distance between two adjacent circumferential surfaces provided with the stirring shafts 6 is preferably 5-15 cm, such as 5 cm, 6 cm, 7 cm, 7.5 cm, 8 cm, 10 cm, 12 cm, 15 cm and the like. The optimal spacing is 7.5-10 cm.
In a further preferred embodiment, the mixing shafts 6 on adjacent circumferential surfaces are located on different vertical planes. At this moment, the material that is in adjacent position department is stirred and is smashed by (mixing) shaft 6, blade 7 on different vertical faces, and adjacent material is inconsistent by the direction of stirring, and the movement track of adjacent material is also inconsistent, further makes the material be in the mixing state in the cavity, can not bond together, improves the loose degree of material, carries out the heat convection with the hot gas more easily, further improves heat exchange efficiency.
As a more preferable embodiment, the number of the agitating shafts 6 is four, four agitating shafts 6 are respectively provided on four circumferential surfaces of the rotating shaft 5, and the four agitating shafts 6 are respectively provided on a top outer wall in the Z-axis direction, a front outer wall in the Y-axis direction, a rear outer wall in the Y-axis direction, and a bottom outer wall in the Z-axis direction of the rotating shaft 5 in this order. The mode of arranging is adopted to (mixing) shaft 6, and at pivot 5 rotation in-process, the moment that two (mixing) shafts 6 on top outer wall and the bottom outer wall produced to pivot 5 can be balanced each other, and the moment that two (mixing) shafts 6 on adjacent anterior outer wall and the rear portion outer wall produced to pivot 5 is balanced each other for pivot 5, (mixing) shaft 6 and blade 7 function more steadily, have avoided pivot 5 to produce the vibration phenomenon, improve the life of drying furnace.
As a modified embodiment of the number of the stirring shafts 6, the number of the stirring shafts 6 can also be 8, 12, 16 and the like, namely the number of the stirring shafts 6 is 4n, wherein n is more than or equal to 1, and every four stirring shafts 6 are repeatedly arranged on the outer wall of the rotating shaft 5 in the arrangement mode.
As another modified embodiment of the number of the stirring shafts 6, the number of the stirring shafts 6 may also be 5, 6, 7, 8, and so on, the stirring shafts 6 are respectively disposed on different circumferential surfaces of the rotating shaft 5, and the stirring shafts 6 are distributed on the radial circumference of the rotating shaft 5 as viewed from the radial direction of the rotating shaft 5, and are optimally located at the division point of the radial circumference of the rotating shaft 5, for example, six stirring shafts 6 are distributed on six circumferential surfaces, and the six stirring shafts 6 are located at exactly six division points of the circumferential surface of the rotating shaft 5 as viewed from the radial direction of the rotating shaft 5, so as to stir and crush the material in multiple directions.
In the above embodiment, the shape of the blade 7 may be a square, a trapezoid, a sector, a heart, and the like, and the shape is not limited in particular, and the surface of the blade 7 may be a smooth plane, a curved surface with a certain arc transition, or a surface with other shapes.
As agitating unit's deformation implementation mode, agitating unit can also be including setting up a plurality of connecting rods on 5 axial outer walls of pivot to and around a plurality of fins of connecting rod outer wall setting on the connecting rod, the mode of arranging of fin on the connecting rod can be similar prior art fan blade's the mode of arranging, and the fin can be rotatory round the axis direction of connecting rod, and then comes to stir and smash the material. In addition, the stirring device can also be other stirring devices or crushing devices which can stir and crush materials in the prior art.
As a preferred embodiment, the system further comprises an air supply device 4, the air supply device 4 is a hot blast stove, an air outlet of the hot blast stove is connected to the first air inlet 13 through a second pipeline 16, and hot air of the hot blast stove is conveyed into the cavity of the furnace body 1, so that the hot air and the material are subjected to direct convection heat exchange. As a modification, the air supply device 4 may also be a device capable of delivering hot air into the cavity of the furnace body 1 through the first air inlet 13 in the prior art, for example, a heater heats external air to form hot air at a desired temperature, and then the hot air is directly drawn into the cavity of the furnace body 1 by a fan.
As a further preferred embodiment, an air distribution device 15 is further included, and an air outlet of the air distribution device 15 is connected to the second pipe 16 and used for introducing outside air into the second pipe 16 and mixing with the hot air in the second pipe 16. At this time, the temperature of the hot gas conveyed into the cavity of the furnace body 1 by the air supply device 4 is mainly prevented from being too high, the furnace body 1, the stirring shaft 6 and the blades 7 are influenced, and the hot gas with the too high temperature is reduced by introducing outside cold air into the second pipeline 16 to form the hot gas with the required temperature.
Preferably, the air distribution device 15 may comprise a fan which draws outside air directly into the second duct 16 according to the requirements; or any device or equipment capable of delivering outside air into the second duct 16 in the prior art. In addition, it is preferable to provide a detector in the air distribution device 15, which can detect the volume content of the outside air entering the second duct 16, so as to test the amount of the air entering the second duct 16 in time, and to facilitate the opening of the air distribution device 15.
As a more preferable embodiment, the dust removing device 9 is further included, and the dust removing device 9 includes a cyclone cylinder having a second air inlet 91, a second air outlet and a third air outlet 92. The second air inlet 91 is connected to the first air outlet 14, the second air outlet is communicated with the outside, and the third air outlet 92 is communicated with the cavity of the air supply device 4 through the first pipeline 10, so that the dedusted air is mixed with the hot air in the air supply device 4 to form the hot air with the required moisture content.
Specifically, after the material is dried in the furnace body 1, the gas after heat exchange with the material in the furnace body 1 is introduced into the cyclone cylinder through the second gas inlet 91; under the action of a fan, gas makes spiral ascending motion in the cyclone cylinder, solid particles and liquid contained in the gas are thrown on the inner wall surface of the cyclone cylinder in the ascending process, and the solid particles and the liquid are deposited at the bottom of the cyclone cylinder under the action of self gravity; and one part of gas with the solid particles and the liquid thrown away is directly discharged to the outside air through the second gas outlet, and the other part of gas is conveyed to the cavity of the air supply device 4 through the third gas outlet 92 and is mixed with the hot gas in the cavity of the air supply device 4, so that part of gas after dust removal is recycled, and the heat required for heating the hot gas is reduced.
In addition, the moisture content in the dedusted gas is generally 20-30%, the moisture content of the hot gas in the air supply device 4 is almost 0%, the dedusted gas with the moisture content of 20-30% is introduced into the air supply device 4 and is mixed with the dry hot gas to form the hot gas with the moisture content of 6-15%, and the efficiency and the effect of heat exchange between the hot gas and the material when the hot gas is introduced into the furnace body 1 are better than the efficiency and the effect of heat exchange between the dry hot gas with the moisture content of 0% and the material when the hot gas is introduced into the furnace body 1. Because the hot gas contains a small amount of moisture, the specific heat capacity of water is larger than that of air under the same environment, and when the same amount of materials are dried, the heat required by the water is smaller, so that the heat required by the dried materials is reduced, and the drying efficiency is improved, but the moisture content in the hot gas is not too high, the heat exchange efficiency is reduced after the moisture content is too high, and then the optimal moisture content of the hot gas is controlled to be 6-15%.
The feeding device 2 and the receiving device 3 in the above embodiment are described. The feeding device 2 is preferably a feeding machine in the prior art, such as a hoist, and a hopper mounted on the feeding port 11, and the discharging port of the hoist may face or extend into the hopper. The receiving device 3 is preferably a screw conveyor, or a belt conveyor and a chain conveyor, or a discharge bin is arranged directly below the discharge opening 12.
As a preferred embodiment of the feed port 11, the discharge port 12, the first air inlet 13, and the first air outlet 14 formed in the furnace body 1, as shown in fig. 2 and 3, the feed port 11 is formed in a radial side wall of the furnace body 1, the discharge port 12 is formed in a bottom outer wall of the furnace body 1 in the Z-axis direction, the first air inlet 13 is formed in a top outer wall of the furnace body 1 in the Z-axis direction near the feed port 11, and the first air outlet 14 is formed in a top outer wall of the furnace body 11 in the Z-axis direction and is opposite to the discharge port 12.
In summary, in the drying system of this embodiment, when drying the material, firstly, the distance between the blade 7 and the inner wall of the furnace body 1, the angle at which the blade 7 is inclined on the stirring shaft 6, and the distance between two adjacent circumferential surfaces on the rotating shaft 5 are adjusted according to the properties of the material, such as the parameters of water content, particle size, drying degree, and the like; and according to the amount of the added materials and the amount of hot gas introduced into the furnace body 1, the drying degree required by the retention time of the materials in the furnace body 1 can be achieved, and the optimal parameters of each material to be dried can be obtained through a plurality of tests, so that the drying furnace with the corresponding parameters and the drying system with the drying furnace are prepared.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (2)
1. A drying apparatus comprises
The furnace body (1) is arranged along the horizontal direction and is provided with a cavity, a feeding hole (11) for feeding and taking out materials and a discharging hole (12); a first air inlet (13) and a first air outlet (14) for the inflow and outflow of the heat supply gas;
the feeding device (2) is used for feeding materials into the furnace body (1);
the material receiving device (3) is used for collecting the dried materials in the furnace body (1);
stirring device comprising
The rotating shaft (5) is arranged in the cavity of the furnace body (1) in a penetrating mode, the rotating shaft (5) is provided with a ventilation cavity, a plurality of air nozzles are arranged on the ventilation cavity, and the air injection directions of the air nozzles are not parallel to the stirring direction of the stirring shaft (6) and the stirring direction of the blades (7);
the stirring shafts (6) are arranged on the outer wall of the rotating shaft (5), extend towards the radial direction of the rotating shaft (5), and are distributed along the axial outer wall of the rotating shaft (5);
the stirring shaft (6) is obliquely arranged on the stirring shaft (7), and the distance between every two adjacent blades (7) is not more than 30 mm;
the stirring shafts (6) are distributed on a plurality of circumferential surfaces of the rotating shaft (5) which are arranged at intervals, and at least one stirring shaft (6) is distributed on each circumferential surface of the rotating shaft (5);
the stirring shafts (6) on the adjacent circumferential surfaces are positioned on different vertical surfaces;
the angle of the blades (7) obliquely arranged on the stirring shaft (6) is more than 0 degree and less than or equal to 20 degrees.
2. Drying apparatus according to claim 1, wherein: the stirring shafts (6) are at least four, the stirring shafts (6) are respectively arranged on four circumferential surfaces of the rotating shaft (5), and the stirring shafts (6) are respectively and sequentially arranged on the outer wall of the top of the rotating shaft (5) in the Z-axis direction, the outer wall of the front part of the rotating shaft in the Y-axis direction, the outer wall of the rear part of the rotating shaft in the Y-axis direction and the outer wall of the bottom of the rotating shaft in the Z-axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810178863.6A CN108413737A (en) | 2015-12-30 | 2015-12-30 | A kind of drying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810178863.6A CN108413737A (en) | 2015-12-30 | 2015-12-30 | A kind of drying device |
| CN201511017194.7A CN105387712B (en) | 2015-12-30 | 2015-12-30 | A kind of drying device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201511017194.7A Division CN105387712B (en) | 2015-12-30 | 2015-12-30 | A kind of drying device |
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| CN108413737A true CN108413737A (en) | 2018-08-17 |
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| CN201810178663.0A Expired - Fee Related CN108387082B (en) | 2015-12-30 | 2015-12-30 | Drying device |
| CN201810178863.6A Pending CN108413737A (en) | 2015-12-30 | 2015-12-30 | A kind of drying device |
| CN201511017194.7A Active CN105387712B (en) | 2015-12-30 | 2015-12-30 | A kind of drying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106037526B (en) * | 2016-06-08 | 2018-11-20 | 佛山市顺德区美的电热电器制造有限公司 | Material drying device and cooking machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108387082A (en) | 2018-08-10 |
| CN105387712B (en) | 2019-01-29 |
| CN108387082B (en) | 2021-01-15 |
| CN105387712A (en) | 2016-03-09 |
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Application publication date: 20180817 |