CN114526587A - Carbon black drying machine with reflux device and use method thereof - Google Patents
Carbon black drying machine with reflux device and use method thereof Download PDFInfo
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- CN114526587A CN114526587A CN202210076776.6A CN202210076776A CN114526587A CN 114526587 A CN114526587 A CN 114526587A CN 202210076776 A CN202210076776 A CN 202210076776A CN 114526587 A CN114526587 A CN 114526587A
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- carbon black
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- cylinder
- dryer
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- 239000006229 carbon black Substances 0.000 title claims abstract description 89
- 238000010992 reflux Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 11
- 238000001035 drying Methods 0.000 title description 16
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 241000872198 Serjania polyphylla Species 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012958 reprocessing Methods 0.000 description 2
- 238000011268 retreatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000005550 wet granulation Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
- F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
- F26B11/0463—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall
- F26B11/0477—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum
- F26B11/0481—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for mixing, stirring or conveying the materials to be dried, e.g. mounted to the wall, rotating with the drum the elements having a screw- or auger-like shape, or form screw- or auger-like channels
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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
-
- 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
- F26B25/009—Alarm systems; Safety sytems, e.g. preventing fire and explosions
-
- 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
- F26B25/02—Applications of driving mechanisms, not covered by another subclass
-
- 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
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a carbon black dryer with a reflux device, which comprises a riding wheel mechanism for supporting a cylinder to rotate, a transmission device for driving the cylinder to rotate and an outlet material box arranged at a discharge port of the cylinder, wherein the outlet material box is provided with a discharge port and an airtight valve; the invention creatively adds a reflux device and a temperature measuring part for the first time in the original carbon black dryer, strictly controls the moisture of the carbon black, starts and stops the device, and carries out reflux treatment on unqualified carbon black discharged from the dryer when the device has a temporary fault, namely, the unqualified carbon black with the moisture exceeding the standard is refluxed in the dryer to be continuously dried; the requirements of safety and environmental protection can be met, the economic benefit of enterprises is improved, meanwhile, the requirements of customers are met, and good social benefit is achieved; fills the blank of no intelligent reflux device dryer in China.
Description
Technical Field
The invention belongs to the technical field of carbon black production, and relates to a carbon black drying machine with a reflux device and a using method thereof.
Background
The carbon black factory generally adopts wet granulation and drying technology of powdered carbon black. The powdery carbon black produced by the wet method is granulated and formed by a wet granulator, then enters a rotary dryer for drying, and is stored in a product storage tank by lifting, screening, magnetic separation and winnowing. The finished product is packaged and put in storage or directly transported in bulk to users.
Because the wet content of the carbon black after granulation is up to 50 percent, the water content of the carbon black finished product is below 1 percent. The carbon black factory generally adopts a rotary dryer for drying. The drying structure of the rotary dryer is divided into two modes of directly drying carbon black particles and indirectly drying the carbon black particles, and a drying heat source is provided by burning carbon black tail gas. The axis of the cylinder of the rotary dryer is arranged at an inclination angle, wet carbon black flows in from the high end, is heated and gradually dehydrated and dried in the middle moving process downwards, and finally flows out from the outlet at the low end. In the production process, once the rotary dryer is dried and heated, in order to prevent the cylinder of the rotary dryer from being locally overheated, the rotary dryer must be in a continuous rotating state, and the dried discharging is also continuous discharging.
The existing rotary dryer has mature use technology but has certain limitation, and is mainly embodied in the following two aspects:
1. the carbon black with the water content exceeding the standard is generally sent to a defective product tank, the defective product is sent to a retreatment bag filter by a retreatment fan and is filtered together with carbon black-containing gas of a dust collection system of the equipment and a dust collection system of a packing machine, and the recovered carbon black is sent to an air conveying system again to be processed into a qualified product. The processing mode is mature and commonly used, the problems are that after the chemical feeding, unqualified products in the initial granulation stage, unqualified products during the fault period, unqualified products with over-standard moisture, unqualified products during the transition period of the transfer production and the like are all thrown into an unqualified product tank, the general humidity of the carbon black of the part of unqualified products is large, the moisture is more than 3 percent, the reprocessing difficulty is large, and the pipeline is easy to block! Often sold as a defective product, increasing operating costs.
2. The temperature of carbon black at the outlet of a dryer is mainly controlled in production and is usually controlled within the range of 200-220 ℃, but the temperature TRA-200 at the outlet of the dryer is reduced to 150-170 ℃ after temporary failure or temporary stop in the production process, so that the water content of carbon black discharged from the dryer exceeds the standard, the carbon black can reach normal temperature after recovery time of 20-30 minutes, the carbon black with the water content exceeding the standard still enters a product bin in the recovery time, the water content of products in the product bin fluctuates, large carbon black blocks locally appear in the carbon black bin, the packaging and blanking are not smooth, and the quality of batch products is not stable.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a carbon black drying machine with a reflux device.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a take reflux unit's carbon black desiccator, includes the frame, install in the frame and have feed port and discharge port's barrel, equipartition at a plurality of shovelling plates of barrel inner wall, support barrel pivoted riding wheel mechanism, drive barrel pivoted transmission and install the export workbin at barrel discharge port, be provided with discharge gate and airtight valve on the export workbin, the one end that is close to the export workbin in the barrel is provided with reflux unit, install the temperature measurement spare of measuring barrel discharge port temperature on the export workbin.
Furthermore, the reflux device comprises a plurality of spiral belts uniformly distributed on the inner wall of the cylinder body close to the outlet bin.
Further, the length of the spiral band is 400-600 mm.
Further, the temperature measuring part comprises a temperature measuring thermocouple.
Further, S1, performing linkage control on the temperature of the discharge port of the cylinder, the transmission device, the airtight valve of the outlet material box and the temperature of the discharge port of the outlet material box;
s2, monitoring the carbon black temperature of the discharge port of the cylinder and the discharge port of the outlet material box in real time, and judging whether the carbon black temperature reaches the required standard; if the temperature of the carbon black does not reach the required standard, the transmission device drives the cylinder body to rotate reversely, the backflow device drives the carbon black to enter a backflow state, and the carbon black is continuously dried in the cylinder body until the temperature of the carbon black reaches the required standard;
s3, controlling the opening and closing of an airtight valve of an outlet material box, discharging the carbon black meeting the temperature standard through a discharge hole, and entering the next production procedure
Further, when the temperature of carbon black at a discharge hole of the outlet feed box in S2 is less than 200 ℃, sending alarm information;
when the temperature of the carbon black at the discharge port of the outlet material box in the S2 is lower than 190 ℃, the airtight valve of the outlet material box is closed, the transmission device drives the cylinder body to rotate reversely, the reflux device drives the carbon black to enter a reflux state, and the carbon black is continuously dried in the cylinder body;
when the temperature of the carbon black at the discharge port of the cylinder in the S2 is greater than or equal to 200 ℃, the airtight valve of the outlet material box is opened, the transmission device drives the cylinder to rotate positively, and the carbon black enters a discharge state.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the reflux device and the temperature measuring part are additionally arranged in the original carbon black drying machine to strictly control the moisture of the carbon black, the device is started and stopped, the unqualified carbon black from the drying machine is subjected to reflux treatment when the temporary fault occurs, namely, the unqualified carbon black with excessive moisture is refluxed in the drying machine to be continuously dried, so that the load of an unqualified storage tank can be reduced, the pipeline blockage in the carbon black reprocessing process of the unqualified storage tank is reduced, the defective rate of the carbon black is reduced, the production running cost is reduced, the energy is saved, and the consumption is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. a barrel; 2. shoveling plates; 3. a transmission device; 4. an outlet bin; 5. a helical band; 6. and a temperature thermocouple.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1, the technical solution adopted by the present invention is as follows: the utility model provides a take reflux unit's carbon black desiccator, includes the frame, install barrel 1, the equipartition that just has inlet port and discharge port in the frame at a plurality of shovelling plates 2 of 1 inner wall of barrel, support 1 pivoted riding wheel mechanism of barrel, drive 1 pivoted transmission 3 of barrel and install export workbin 4 at 1 discharge port of barrel, be provided with the discharge gate on the export workbin 4, this discharge gate department installs the airtight valve of its switching of control, and this discharge gate department still installs the thermoscope, and barrel 1 rotates under transmission 3's drive, and barrel 1 is at the rotation in-process, and shovelling plate 2 copies the carbon black particle, spills again and falls, increases the contact of carbon black particle and hot gas flow, improves drying efficiency.
A backflow device is arranged at one end, close to the outlet bin 4, in the barrel body 1, the backflow device is a plurality of spiral belts 5, the spiral belts 5 are uniformly distributed on the inner wall of the barrel body 1 in a welding mode or are fixed through bolts, the spiral belts 5 are close to the outlet bin 4, the spiral belts 5 are obliquely arranged on the inner wall of the barrel body 1, and preferably, the higher ends of the spiral belts 5 are close to the outlet bin 4; the spiral included angle between the spiral belt 5 and the cylinder 1 is preferably 10-60 degrees, and the length of the spiral belt 5 is preferably 400-600 mm; when the cylinder body 1 rotates forwards, the spiral belt 5 pushes the carbon black particles to a discharge port of an outlet feed box 4; when the cylinder body 1 is reversed, carbon black particles flow back at the spiral belt 5, the discharge hole stops discharging, and the material is retained in the carbon black drying machine to be continuously dried.
In this embodiment, the spiral belt 5 and the shoveling plates 2 are made of the same material, and in actual use, the spiral belt 5 can be welded by combining a plurality of shoveling plates 2, thereby further saving the cost.
In this embodiment, the outlet bin 4 is provided with a temperature measuring pipe orifice, the temperature measuring pipe orifice is provided with a temperature measuring piece, the temperature measuring piece is preferably a temperature measuring thermocouple 6, the temperature measuring thermocouple 6 extends into the cylinder 1, and the temperature of the carbon black particles at the discharge end of the cylinder 1 is measured.
S1, performing linkage control on the temperature of the discharge port of the barrel 1, the temperature of the transmission device 3, the airtight valve of the outlet material box 4 and the temperature of the discharge port of the outlet material box 4, namely electrically connecting the temperature thermocouple 6, the motor of the transmission device 3, the airtight valve and the temperature detector to the conventional PLC, and respectively controlling the specific use states of the temperature thermocouple 6, the motor, the airtight valve and the temperature detector through the PLC;
s2, monitoring the carbon black temperature at the discharge port of the barrel 1 in real time through the temperature thermocouple 6, monitoring the carbon black temperature at the discharge port of the outlet material box 4 in real time through the temperature detector, and judging whether the carbon black temperature reaches the required standard or not;
if the carbon black temperature does not meet the required standard:
when the temperature of the carbon black at the discharge hole of the outlet material box 4 measured by the temperature detector is less than 200 ℃, sending alarm information;
when the temperature of the carbon black at the discharge port of the outlet material box 4 measured by the temperature measurer is lower than 190 ℃, the PLC controller controls the air-tight valve to be closed, meanwhile, the PLC controller controls the transmission device 3 to drive the cylinder 1 to rotate reversely, the spiral belt 5 drives the carbon black to enter a backflow state, carbon black particles backflow at the spiral belt 5, and the carbon black is continuously dried in the cylinder 1 until the required temperature standard is reached;
when the temperature thermocouple 6 detects that the temperature of the carbon black at the discharge port of the cylinder body 1 is greater than or equal to 200 ℃, namely the temperature of the carbon black in the cylinder body 1 reaches the required temperature standard, the PLC controls the transmission device 3 to drive the cylinder body 1 to rotate forwards, meanwhile, the PLC controls the air-tight valve to be opened, the carbon black is discharged from the discharge port, and the next procedure is carried out.
S3, controlling the opening and closing of an airtight valve of the outlet feed box 4, discharging the carbon black meeting the temperature standard through a discharge hole, and entering the next production procedure.
In this embodiment, the temperature of the discharge port of the outlet bin 4, the temperature of the discharge port of the cylinder 1, the opening state of the airtight valve, and the rotation state of the cylinder 1 can be displayed in the central control room DCS system.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a take reflux unit's carbon black desiccator, includes the frame, install in the frame and have barrel (1) of charge-in port and discharge port, equipartition at a plurality of copy boards (2) of barrel (1) inner wall, support barrel (1) pivoted riding wheel mechanism, drive barrel (1) pivoted transmission (3) and install export workbin (4) at barrel (1) discharge port, be provided with discharge gate and airtight valve on export workbin (4), its characterized in that: a backflow device is arranged at one end, close to the outlet feed box (4), in the barrel body (1), when the rotating direction of the barrel body (1) is changed, the backflow device drives the carbon black to enter a backflow state, and a temperature measuring piece for measuring the temperature of a discharge port of the barrel body (1) is installed on the outlet feed box (4).
2. The carbon black dryer with a reflow apparatus of claim 1, wherein: the reflux unit comprises a plurality of spiral belts (5) which are uniformly distributed on the inner wall of the cylinder body (1) close to the outlet bin (4).
3. The carbon black dryer with a reflow apparatus of claim 2, wherein: the length of the spiral belt (5) is 400-600 mm.
4. The carbon black dryer with a reflow apparatus of claim 1, wherein: the temperature measuring piece comprises a temperature measuring thermocouple (6).
5. The method of using a carbon black dryer with a reflow apparatus as in claim 1, comprising the steps of:
s1, performing interlocking control on the temperature of the discharge port of the cylinder (1), the transmission device (3), the airtight valve of the outlet material box (4) and the temperature of the discharge port of the outlet material box (4);
s2, monitoring the carbon black temperature of the discharge port of the cylinder (1) and the discharge port of the outlet material box (4) in real time, and judging whether the carbon black temperature reaches the required standard; if the carbon black temperature does not reach the required standard, the transmission device (3) drives the cylinder body (1) to rotate reversely, the reflux device drives the carbon black to enter a reflux state, and the carbon black is continuously dried in the cylinder body (1) until the required temperature standard is reached;
s3, controlling the opening and closing of an airtight valve of the outlet feed box (4), discharging the carbon black meeting the temperature standard through a discharge hole, and entering the next production process.
6. Use of a carbon black dryer with a return device according to claim 5, characterized in that:
when the temperature of carbon black at a discharge hole of an outlet feed box (4) in the S2 is less than 200 ℃, sending alarm information;
when the temperature of the carbon black at the discharge port of the outlet feed box (4) in the S2 is lower than 190 ℃, the airtight valve of the outlet feed box (4) is closed, the transmission device (3) drives the cylinder (1) to rotate reversely, the reflux device drives the carbon black to enter a reflux state, and the carbon black is continuously dried in the cylinder (1);
when the temperature of the carbon black at the discharge port of the cylinder (1) in the S2 is greater than or equal to 200 ℃, the airtight valve of the outlet material box (4) is opened, the transmission device (3) drives the cylinder (1) to rotate positively, and the carbon black enters a discharge state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210076776.6A CN114526587A (en) | 2022-01-24 | 2022-01-24 | Carbon black drying machine with reflux device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210076776.6A CN114526587A (en) | 2022-01-24 | 2022-01-24 | Carbon black drying machine with reflux device and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN114526587A true CN114526587A (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210076776.6A Pending CN114526587A (en) | 2022-01-24 | 2022-01-24 | Carbon black drying machine with reflux device and use method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040078918A (en) * | 2003-03-07 | 2004-09-13 | 데구사 아게 | Carbon black pellets |
| CN202915663U (en) * | 2012-11-14 | 2013-05-01 | 杭州中策清泉实业有限公司 | Carbon black production drying machine |
| CN202915688U (en) * | 2012-11-08 | 2013-05-01 | 中橡集团炭黑工业研究设计院 | Rotary dryer shoveling plate arraying structure |
| CN204388501U (en) * | 2015-01-06 | 2015-06-10 | 遵义粒满丰肥业有限责任公司 | A kind of organic fertilizer drying device |
| CN105737549A (en) * | 2016-04-11 | 2016-07-06 | 天津市美隆制药机械有限公司 | Dynamic solid vacuum drying machine |
| CN107228539A (en) * | 2017-08-08 | 2017-10-03 | 赵文旭 | A kind of corn drying machinery of efficient energy-saving |
| CN108679994A (en) * | 2018-07-17 | 2018-10-19 | 江西省科学院食品工程创新中心 | Lotus seeds electrical heating rotary drying device |
| CN112284073A (en) * | 2018-04-28 | 2021-01-29 | 杜海美 | Inside and outside rotation type grain nondestructive drying machine |
| CN213020693U (en) * | 2020-09-14 | 2021-04-20 | 苏州赛弗尔机械有限公司 | High-efficient drum dryer |
-
2022
- 2022-01-24 CN CN202210076776.6A patent/CN114526587A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040078918A (en) * | 2003-03-07 | 2004-09-13 | 데구사 아게 | Carbon black pellets |
| CN202915688U (en) * | 2012-11-08 | 2013-05-01 | 中橡集团炭黑工业研究设计院 | Rotary dryer shoveling plate arraying structure |
| CN202915663U (en) * | 2012-11-14 | 2013-05-01 | 杭州中策清泉实业有限公司 | Carbon black production drying machine |
| CN204388501U (en) * | 2015-01-06 | 2015-06-10 | 遵义粒满丰肥业有限责任公司 | A kind of organic fertilizer drying device |
| CN105737549A (en) * | 2016-04-11 | 2016-07-06 | 天津市美隆制药机械有限公司 | Dynamic solid vacuum drying machine |
| CN107228539A (en) * | 2017-08-08 | 2017-10-03 | 赵文旭 | A kind of corn drying machinery of efficient energy-saving |
| CN112284073A (en) * | 2018-04-28 | 2021-01-29 | 杜海美 | Inside and outside rotation type grain nondestructive drying machine |
| CN108679994A (en) * | 2018-07-17 | 2018-10-19 | 江西省科学院食品工程创新中心 | Lotus seeds electrical heating rotary drying device |
| CN213020693U (en) * | 2020-09-14 | 2021-04-20 | 苏州赛弗尔机械有限公司 | High-efficient drum dryer |
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Application publication date: 20220524 |
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