CN108679994A - Lotus seeds electrical heating rotary drying device - Google Patents
Lotus seeds electrical heating rotary drying device Download PDFInfo
- Publication number
- CN108679994A CN108679994A CN201810785963.5A CN201810785963A CN108679994A CN 108679994 A CN108679994 A CN 108679994A CN 201810785963 A CN201810785963 A CN 201810785963A CN 108679994 A CN108679994 A CN 108679994A
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- China
- Prior art keywords
- drying
- cylinder
- lotus seeds
- hollow shaft
- heating tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/30—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors
- F26B17/32—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors the movement being in a horizontal or slightly inclined plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
-
- 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
-
- 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
-
- 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
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
-
- 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
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/16—Chambers, containers, receptacles of simple construction mainly closed, e.g. drum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Pretreatment Of Seeds And Plants (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of lotus seeds electrical heating rotary drying devices, including rotating electric heating tube, it rotates electric heating tube both ends and connects hollow shaft, hollow shaft is erected on the bearing block on holder, feed inlet is set on the right side of rotation electric heating tube, left side sets out material mouth, hollow shaft left distal end connects rotary conductive slip ring, right end is sequentially connected shaft coupling, speed reducer, speed reducer is connected by just, the variable-frequency motor of inversion controller control, it is insulating layer that heat-preservation cotton is filled between interior drying cylinder and outer fixed cylinder, silicone rubber high temperature resistant cable passes through left side hollow shaft, one end is sequentially connected rotary conductive slip ring, connect external power supply, the electrothermal tube of another relay termination control；Temperature controller is separately connected temperature sensor and relay.The present invention saves energy consumption, it can be achieved that lotus seeds constant temperature or alternating temperature drying, produce high-quality product, can control lotus seeds residence time in drying cylinder, realize lotus seeds evenly drying.
Description
Technical field
It is big that the present invention relates to a kind of graininess, thermal sensitivity agricultural product electrical heating rotary drying device more particularly to lotus seeds etc.
The lotus seeds electrical heating rotary drying device of granule materials.
Background technology
Lotus seeds are China's Ways of Special Agricultural Products, are loved by consumers.Drying is the important means of dry lotus seeds processing.Lotus seeds
Grain is big, and content of starch is high.Unsuitable drying easily causes lotus seeds hardening, drying time extends, and influences product quality and drying
Efficiency.Traditional dry lotus seeds production method is mainly dried using charcoal fire baking or the sun.The sun, which dries, easily to be influenced by weather, is given birth to
Object pollutes, and time-consuming；Drying process easily makes the polyphenols in lotus seeds aoxidize, and product is caused to black；Charcoal fire roasting mode
The disadvantage is that the duration and degree of heating is difficult to control, take a lot of work more, it is easy scalding, burned, seriously affect product quality.In recent years, with hot air convective drying, micro-
Novel lotus seeds dry technology based on wave drying is rising.Lotus seeds particle is big, the hot air convective drying later stage its internal moisture not
It easily removes, drying time is long；The microwave drying time is short, but the inhomogeneities of microwave distribution is easy to cause lotus seeds hot-spot, coke
Change.
From the point of view of heat transfer type, drying can be divided into the modes such as conduction, convection current, radiation and micro-wave dielectric.Conductive drying is
Material is directly effectively contacted by dry process with heating surface, and heat-transfer mechanism is based on heat transfer.Compared to present extensive use
Convective drying technology, conductive drying remarkable advantage is that heat and mass is efficient, the thermal efficiency is high.Former is mainly that rotating cylinder is dry
Dry machine, rotary drum dryer etc., application field is extensive.It is widely used in numerous graininess such as chemical industry, medicine by many countries
In the drying field of material.This kind of drying equipment heat source is mainly based on steam or hot-blast stove heating, and drying temperature is high, and temperature is not
It is easy to control, be not suitable for the drying of the granule materials such as thermal sensitivity lotus seeds.
Conduction type whizzer operation principle is that raw material enters from drying cylinder one end, when by cylinder interior, in cylinder
Heating surface is in direct contact and is dried, and the product after drying is collected from the other end.Inner barrel is equipped with shovelling plate, material can be made to raise
It rises, under throwing, material is made to be come into full contact with heating surface, improve rate of drying.
Based on conductive drying technology, the controllable drying equipment of exploitation drying condition can be that the bulky grains agricultural product such as lotus seeds add
Work provides a kind of new drying method.It is had not been reported using the drying device of electrical heating rotary drying lotus seeds.
Invention content
In view of the above-mentioned problems, an object of the present disclosure is to provide lotus seeds electrical heating rotary drying device, electrical heating rotating cylinder
Drying device is in direct contact using rotation electric heating tube to dry lotus seeds, and interior dry drum outer wall is close to electrothermal tube or winding electricity adds
Lotus seeds high quality heat conductive drying is realized in the torrid zone.
The object of the invention second is that electrothermal tube or heat tape use temperature controller temperature control, realize drying device constant temperature,
After setting drying temperature, temperature controller realizes drying cylinder heating, cooling by controlling relay on-off, meets drying
Technological requirement.
The three of the object of the invention are to extend lotus seeds in drying using drying cylinder positive and negative rotation, the interior method for setting helical form shovelling plate
Residence time in cylinder realizes lotus seeds evenly drying.
The above-mentioned technical problem of the present invention is mainly to be addressed by following technical proposals：A kind of lotus seeds electrical heating turn
Cylinder drying device, including rotation electric heating tube, holder, variable-frequency motor, gear reducer, shaft coupling, temperature sensor, temperature control
Device, rotary conductive slip ring, bearing block, feed inlet, discharge port, insulating layer and relay；The rotation electric heating tube both ends connection
Hollow shaft, the hollow shaft are erected on the bearing block on holder, set feed inlet on the right side of the rotation electric heating tube, left side is set out
Material mouth, the hollow shaft left distal end connect rotary conductive slip ring, and right end is sequentially connected shaft coupling, speed reducer, the deceleration
Machine connects the variable-frequency motor controlled by forward and backward controller, and it is to protect that heat-preservation cotton is filled between the interior drying cylinder and outer fixed cylinder
Warm layer, the silicone rubber high temperature resistant cable pass through left side hollow shaft, one end to be sequentially connected rotary conductive slip ring, temperature controller,
The other end diverges to the heating tube for being separately connected temperature sensor and relay control, and relay is connected by silicone rubber high temperature resistant cable
Connect rotary conductive slip ring and temperature controller.
The rotation electric heating tube includes interior drying cylinder, outer fixed cylinder heating tube and shovelling plate, outer described in the interior drying cylinder
Fixed cylinder is concentric tube, is equipped with heating tube on the downside of the interior dry drum outer wall, upside is equipped with temperature sensor, the interior drying cylinder
Inner wall sets shovelling plate.
The heating tube is powered by temperature controller temperature control by rotary conductive slip ring.
The shovelling plate is arranged in interior drying cylinder inside spin, and shovelling plate, which rotates backward, to be met lotus seeds and stop for a long time in drying cylinder
It stays, rotates forward discharging.
Drying cylinder side in feed inlet connection, opening up in horn-like, feed inlet opening is close to outer fixed cylinder side
Wall.
The discharge port outlet is set on interior drying cylinder, the gap of outer fixed cylinder.
The inner cylinder both ends connect hollow shaft by hollow connecting tube, and hollow pedestal is on the bearing block on holder.
Operation principle：Lotus seeds enter from feed inlet in interior drying cylinder, and drying temperature, frequency converter are arranged in temperature controller
After middle setting frequency modulation motor frequency, power on, you can start that lotus seeds are dried.In drying process, in heating tube heating
Drying cylinder, lotus seeds are in direct contact and are heated with interior drying cylinder, is dry.Lotus seeds turn on one side under the shovelling plate effect of helical arrangement
It is dynamic, it is fed forward on one side.After reaching setting drying temperature, temperature controller exports electric signal, and actuating of relay turn-off current adds
Heat pipe stops heating inner cylinder.With external environment there are hygroscopic water pressure difference in interior drying cylinder cylinder, feed inlet goes out as air outlet at this time
Material mouth enters interior drying cylinder as air inlet, fresh air by discharge port, and humid air is discharged by feed inlet.And so on,
It is final to realize lotus seeds drying.
The lotus seeds electrical heating rotary drying device of the present invention has the following advantages：
A) with the heat transfer type of heat transfer, convective drying equipment is compared, energy consumption is more saved.
B) drying temperature is controllable, it can be achieved that lotus seeds constant temperature or alternating temperature drying, produce high-quality product.
C) rotary drying drum is driven by variable-frequency motor；Motor is controlled by positive and negative rotating controller and realizes drying cylinder forward and backward.Cylinder
Inner surface is equipped with shovelling plate, rotates backward and meets lotus seeds and stopped for a long time in drying cylinder, rotates forward discharging.Adjust drum rotation
Rate, rotation direction can control lotus seeds residence time in drying cylinder, realize lotus seeds evenly drying.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of lotus seeds electrical heating rotary drying device.
Fig. 2 is the lotus seeds electrical heating rotary drying device I-I sectional views in Fig. 1.
Wherein, 1, rotary conductive slip ring；2, bearing block；3, outer fixed cylinder；4, temperature sensor；5, interior drying cylinder；6, it protects
Warm layer；7, shovelling plate；8, feed inlet；9, hollow shaft；10, shaft coupling；11, speed reducer；12, variable-frequency motor；13, discharge port；14, resistance to
Warm cable；15, heating tube；16, holder；17, hollow connecting tube；18, temperature controller；19, relay；20, frequency converter；21、
Positive and negative rotating controller.
Specific implementation mode
The preferred embodiment of the present invention is described in detail in 1-2 below in conjunction with the accompanying drawings, so that advantages of the present invention and spy
Sign can be easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
A kind of lotus seeds electrical heating rotary drying device, including rotate electric heating tube, holder (16), variable-frequency motor (12), subtract
Fast machine (11), shaft coupling (10), temperature sensor (4), temperature controller (18), rotary conductive slip ring (1), bearing block (2), into
Material mouth (8), discharge port (13), insulating layer and relay (19)；The rotation electric heating tube both ends connection hollow shaft (9) is described
Hollow shaft (9) is erected on the bearing block (2) on holder (16), sets feed inlet (8) on the right side of the rotation electric heating tube, left side is set
Discharge port (13), hollow shaft (9) left distal end connect rotary conductive slip ring (1), right end be sequentially connected shaft coupling (10),
Speed reducer (11), the speed reducer (11) connect the variable-frequency motor (12) controlled by forward and backward controller, the interior drying cylinder and
It is insulating layer that heat-preservation cotton is filled between outer fixed cylinder, and the silicone rubber high temperature resistant cable passes through left side hollow shaft (9), and one end is successively
Connect rotary conductive slip ring (1), temperature controller (18), the other end diverge to be separately connected temperature sensor and relay control
Heating tube (15), relay (19) pass through silicone rubber high temperature resistant cable connection rotary conductive slip ring (1) and temperature controller (18).
The rotation electric heating tube includes interior drying cylinder, outer fixed cylinder heating tube (15) and shovelling plate (7), the interior drying cylinder
It is concentric tube with the outer fixed cylinder, heating tube (15) is equipped on the downside of the interior dry drum outer wall, upside is equipped with temperature sensor,
The interior drying cylinder inner wall sets shovelling plate (7).
The heating tube (15) is powered by temperature controller (18) temperature control by rotary conductive slip ring (1).
The shovelling plate (7) arranges in interior drying cylinder inside spin, shovelling plate (7) rotate backward meet lotus seeds it is long in drying cylinder when
Between stop, rotate forward discharging.
Drying cylinder side in the feed inlet (8) connection, opening up in horn-like, feed inlet (8) opening is close to outer solid
Safety barrel side wall.
Discharge port (13) outlet is set on interior drying cylinder, the gap of outer fixed cylinder.
The inner cylinder both ends connect hollow shaft (9) by hollow connecting tube (17), and hollow shaft (9) frame is on holder (16)
On bearing block (2).
Operation principle：Lotus seeds enter from feed inlet (8) in interior drying cylinder, the dry temperature of setting in temperature controller (18)
In degree, frequency converter (20) after setting frequency modulation motor frequency, power on, you can start that lotus seeds are dried.In drying process,
Drying cylinder in heating tube (15) heating, lotus seeds are in direct contact and are heated with interior drying cylinder, is dry.Lotus seeds are copied helical arrangement
Under plate (7) effect, stirs, be fed forward on one side on one side.After reaching setting drying temperature, temperature controller (18) exports telecommunications
Number, relay (19) acts turn-off current, and heating tube (15) stops heating inner cylinder.There are wet with external environment in interior drying cylinder cylinder
Force difference is divided, feed inlet (8) is used as air outlet, discharge port (13) that air inlet, fresh air is used as to pass through discharge port (13) at this time
Into interior drying cylinder, humid air is discharged by feed inlet (8).And so on, lotus seeds drying is finally realized.
When the present invention works, rotation electric heating tube is driven by variable-frequency motor, passes through regulation motor rotating speed, positive and negative rotating controller
(21) variable-frequency motor (12) controlled rotates forward, and lotus seeds can be made to be fed forward, discharge；Lotus seeds can be extended by, which rotating backward, exists
It is stopped for a long time in drying cylinder, so as to dry complete.
When the present invention works, humid air can be forced to be discharged by wind turbine.
When the present invention works, can constant temperature, gradient increased temperature drying mode be set according to material characteristic, realize material constant temperature,
Alternating temperature is dried.
The present invention is in direct contact electric rotating using lotus seeds and adds using the high technical characterstic of conductive drying heat transfer, mass-transfer efficiency
The method of hot cylinder, realization lotus seeds are efficient, high-quality is dried, and solve bulky grain heat sensitive material and are not easy dry problem.The present invention is dry
Dry device drying temperature is controllable, temperature-changeable, freeze-day with constant temperature.The present invention compared with the hot air convective drying equipment based on power consumption,
Efficiency is notable, and dry products quality is more easy to control.The present invention can be extensively using the dry of the heat sensitive materials such as graininess agricultural product
It is dry, it can also be used to the drying of the industries such as biological products, Chinese patent drug, chemical industry.
Not limited to this, any change or replacement expected without creative work should all cover the guarantor in the present invention
Within the scope of shield.Therefore, protection scope of the present invention should be determined by the scope of protection defined in the claims.
Claims (6)
1. lotus seeds electrical heating rotary drying device, including rotation electric heating tube, holder (16), variable-frequency motor (12), speed reducer
(11), shaft coupling (10), temperature sensor, temperature controller (18), rotary conductive slip ring (1), bearing block (2), feed inlet
(8), discharge port (13), insulating layer and relay (19)；The rotation electric heating tube both ends connection hollow shaft (9) is described hollow
Axis (9) is erected on the bearing block (2) on holder (16), sets feed inlet (8) on the right side of the rotation electric heating tube, left side sets out material
Mouth (13), hollow shaft (9) left distal end connect rotary conductive slip ring (1), and right end is sequentially connected shaft coupling (10), slows down
Machine (11), the speed reducer (11) connect the variable-frequency motor (12) controlled by forward and backward controller, the interior drying cylinder and outer solid
It is insulating layer that heat-preservation cotton is filled between safety barrel, and the silicone rubber high temperature resistant cable passes through left side hollow shaft (9), and one end is sequentially connected
Rotary conductive slip ring (1), temperature controller (18), the other end diverge to the heating for being separately connected temperature sensor and relay control
It manages (15), relay (19) passes through silicone rubber high temperature resistant cable connection rotary conductive slip ring (1) and temperature controller (18).
2. electrical heating rotary drying device according to claim 1, which is characterized in that the rotation electric heating tube includes interior
Drying cylinder, outer fixed cylinder heating tube (15) and shovelling plate (7), the interior drying cylinder and the outer fixed cylinder are concentric tube, described interior
Heating tube (15) is equipped on the downside of dry drum outer wall, upside is equipped with temperature sensor, and the interior drying cylinder inner wall sets shovelling plate (7).
3. electrical heating rotary drying device according to claim 2, which is characterized in that the shovelling plate (7) is in interior drying cylinder
Inside spin arranges.
4. electrical heating rotary drying device according to claim 1, which is characterized in that dry in feed inlet (8) connection
Dry cylinder side, opening up in horn-like, feed inlet (8) opening is close to outer fixed cylinder side wall.
5. electrical heating rotary drying device according to claim 1, which is characterized in that discharge port (13) outlet is set to
The gap of interior drying cylinder, outer fixed cylinder.
6. electrical heating rotary drying device according to claim 1, which is characterized in that the inner cylinder both ends pass through hollow company
(17) connection hollow shaft (9) is taken over, hollow shaft (9) frame is on the bearing block (2) on holder (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785963.5A CN108679994A (en) | 2018-07-17 | 2018-07-17 | Lotus seeds electrical heating rotary drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810785963.5A CN108679994A (en) | 2018-07-17 | 2018-07-17 | Lotus seeds electrical heating rotary drying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108679994A true CN108679994A (en) | 2018-10-19 |
Family
ID=63814429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810785963.5A Pending CN108679994A (en) | 2018-07-17 | 2018-07-17 | Lotus seeds electrical heating rotary drying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108679994A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855762A (en) * | 2019-03-28 | 2019-06-07 | 福建农林大学 | Lotus seeds dry temp measuring system |
| CN112610308A (en) * | 2020-12-31 | 2021-04-06 | 河南玄龟智能科技研究院有限公司 | Electric heating driven particle catcher |
| CN114526587A (en) * | 2022-01-24 | 2022-05-24 | 中昊黑元化工研究设计院有限公司 | Carbon black drying machine with reflux device and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030014558A (en) * | 2001-08-11 | 2003-02-19 | 천지득 | Raw-infrared drying machine by low freguency and high freguerey |
| CN104000299A (en) * | 2014-06-19 | 2014-08-27 | 中国烟草总公司郑州烟草研究院 | Tobacco roller far infrared composite dying experimental equipment |
| CN105588411A (en) * | 2016-02-17 | 2016-05-18 | 常熟市宏宇钙化物有限公司 | Powder drying device |
| CN208779894U (en) * | 2018-07-17 | 2019-04-23 | 江西省科学院食品工程创新中心 | Lotus seeds electric heating rotary drying device |
-
2018
- 2018-07-17 CN CN201810785963.5A patent/CN108679994A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030014558A (en) * | 2001-08-11 | 2003-02-19 | 천지득 | Raw-infrared drying machine by low freguency and high freguerey |
| CN104000299A (en) * | 2014-06-19 | 2014-08-27 | 中国烟草总公司郑州烟草研究院 | Tobacco roller far infrared composite dying experimental equipment |
| CN105588411A (en) * | 2016-02-17 | 2016-05-18 | 常熟市宏宇钙化物有限公司 | Powder drying device |
| CN208779894U (en) * | 2018-07-17 | 2019-04-23 | 江西省科学院食品工程创新中心 | Lotus seeds electric heating rotary drying device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855762A (en) * | 2019-03-28 | 2019-06-07 | 福建农林大学 | Lotus seeds dry temp measuring system |
| CN109855762B (en) * | 2019-03-28 | 2024-04-16 | 福建农林大学 | Lotus seed drying temperature measurement system |
| CN112610308A (en) * | 2020-12-31 | 2021-04-06 | 河南玄龟智能科技研究院有限公司 | Electric heating driven particle catcher |
| CN114526587A (en) * | 2022-01-24 | 2022-05-24 | 中昊黑元化工研究设计院有限公司 | Carbon black drying machine with reflux device and use method thereof |
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