CN105352267A - Drying method and system for paste polyvinyl chloride recycled material - Google Patents
Drying method and system for paste polyvinyl chloride recycled material Download PDFInfo
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- CN105352267A CN105352267A CN201510908398.3A CN201510908398A CN105352267A CN 105352267 A CN105352267 A CN 105352267A CN 201510908398 A CN201510908398 A CN 201510908398A CN 105352267 A CN105352267 A CN 105352267A
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- drier
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- rotatingandflashstreamingdrier
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/005—Drying-steam generating means
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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
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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
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
-
- 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
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- 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
- F26B2200/08—Granular materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a drying method and system for a paste polyvinyl chloride recycled material. The drying method comprises the following steps: feeding to a rotating and flash streaming drier through a charging machine; sending air through the collaboration of an air blower and an induced draft fan 7 into the rotating and flash streaming drier after being heated through a vapor heat exchanger I; forming a micro-negative pressure state by adjusting air volumes of the air blower, the induced draft fan 7 and an induced draft fan 11; forming a high speed rising airflow through the rotating and flash streaming drier, dispersing wet materials of the rotating and flash streaming drier by the airflow, crushing the materials through a stirring device arranged in the rotating and flash streaming drier, and then sending to a double helix dryer I for drying; sending the materials dried in the double helix dryer I into a bag type dust catcher I for treating and then sending to a double helix dryer II for drying; and then sending the materials dried by the double helix dryer II into a bag type dust catcher II. The drying method provided by the invention can solve problems in drying micron-sized fineness heat-sensitive high polymer materials, the water contents of the dried materials are low, and the drying efficiency is high.
Description
Technical field
The present invention relates to chemical technology field, particularly a kind of drying means and system thereof of sticking with paste use polyvinyl chloride reclaimed materials.
Background technology
Paste polyvinyl chloride reclaimed materials washes still sewage material and its slag charge produced in polymerization production process, if this partial material loses not only polluted-water with lower current, and increases production cost, so must recycling.
Recycle paste polyvinyl chloride reclaimed materials and must carry out drying, dry difficult point mainly contains: 1, paste polyvinyl chloride reclaimed materials particle size distribution wider (1 μm ~ 5mm).2, due to can not more than 80 DEG C for heat sensitive material heating-up temperature.3, the higher 25-35% of material water ratio.4, the final water content requirement of material reaches less than 1.0%.5, energy consumption is large.
Summary of the invention
Technical problem to be solved by this invention is dry micrometers level fineness and is thermoresponsive material, and ensures that material water ratio is dried to a kind of drying means and system thereof of sticking with paste use polyvinyl chloride reclaimed materials of less than 1.0% by 25-35%.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of drying means stuck with paste with polyvinyl chloride reclaimed materials, comprising:
By charger 3 to Rotatingandflashstreamingdrier 4 feeding;
Introduce air by air blast 1 and air-introduced machine 7, and send into Rotatingandflashstreamingdrier 4 after being heated by vapor heat exchanger I 2 by air;
Worked in coordination with by air blast 1, air-introduced machine 7 and air is heated rear feeding Rotatingandflashstreamingdrier 4 by vapor heat exchanger I 2;
Micro-vacuum state is formed by regulating the air quantity of air blast 1, air-introduced machine 7 and air-introduced machine 11;
The air-flow risen at a high speed is formed by described Rotatingandflashstreamingdrier 4, the wet stock of described Rotatingandflashstreamingdrier 4 disperses by this air-flow, and by the agitating device established in described Rotatingandflashstreamingdrier 4, material is wherein pulverized, then send into double helix drier I 5 and carry out drying;
Double helix drier II 8 will be sent into after described double helix drier I 5 dried material feeding bag filter I 6 processes and carry out drying;
Bag filter II 10 will be sent into through the dried material of described double helix drier II 8, thus complete dry run.
Further, also comprise: the pressure reduction controlled in described Rotatingandflashstreamingdrier 4 is 0 ~-200mmH
2o tiny structure; Controlling described Rotatingandflashstreamingdrier 4 inlet temperature is 60-140 DEG C, and outlet temperature is 45-75 DEG C.
Further, also comprise: control steam pressure is 0.3 ~ 0.7MPa.
Further, also comprise: under tiny structure, according to the inlet amount of material particular diameter size adjustment Rotatingandflashstreamingdrier 4 and the rotary speed of control whirligig, enable Rotatingandflashstreamingdrier 4 material form curve form at the bottom of air flow method ring and room.
Further, also comprise: the charging rate adjusting charger 3 according to Real-Time Monitoring Flow of Goods and Materials situation in time.
Further, also comprise: by being located at the pulsed pneumatic drying pipe 9 between double helix drier II 8 and bag filter II 10, to increase material and hot air area.
According to another aspect of the present invention, a kind of drying of sticking with paste with polyvinyl chloride reclaimed materials is also provided, comprises air blast 1, vapor heat exchanger I 2, charger 3, Rotatingandflashstreamingdrier 4, double helix drier I 5, bag filter I 6, air-introduced machine 7, double helix drier II 8, bag filter II 10 and air-introduced machine 11; Described air blast 1 connects described Rotatingandflashstreamingdrier 4 by described vapor heat exchanger I 2; Described charger 3 is connected with Rotatingandflashstreamingdrier 4 import; The outlet of described Rotatingandflashstreamingdrier 4 is connected with double helix drier I 5 import; Described double helix drier I 5 outlet is connected with bag filter I 6 import, and described bag filter I 61 exports and connects the import of double helix drier II 8, and another outlet connects described air-introduced machine 7; Described double helix drier II 81 exports and connects bag filter II 10, and another outlet connects air-introduced machine 11.
Further, agitating device is provided with bottom described Rotatingandflashstreamingdrier 4.
Further, described double-cyclone drier I 5 and double helix drier II 8 are inside and outside sleeve structure, and charging aperture is at urceolus, and discharging opening is at inner core.
Further, pulsed pneumatic drying pipe 9 is provided with between described double helix drier II 8 and bag filter II 10.
The drying means of paste polyvinyl chloride reclaimed materials provided by the invention and system thereof, can efficient drying micron order fineness and be thermoresponsive material, and ensures that material water ratio is dried to less than 1.0% by 25-35%.By by after this reclaimed materials drying, may be used for processing conveyer belt, artificial leather, plastic floor etc., both solved sewage discharge environmental issue, and again reduced production cost.
Accompanying drawing explanation
The schematic diagram of the drying means of the paste polyvinyl chloride reclaimed materials that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the drying system of the paste polyvinyl chloride reclaimed materials that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
See Fig. 1, a kind of drying means stuck with paste with polyvinyl chloride reclaimed materials that the embodiment of the present invention provides, the method is that the method specifically comprises based on the system shown in Fig. 2:
Step 10, by charger 3 to Rotatingandflashstreamingdrier 4 feeding.
Step 20, by air blast 1 with air-introduced machine 7 is collaborative introduces air, and send into Rotatingandflashstreamingdrier 4 after being heated by vapor heat exchanger I 2 by air; Micro-vacuum state is formed by regulating the air quantity of air blast 1, air-introduced machine 7 and air-introduced machine 11;
Step 30, the air-flow risen at a high speed by Rotatingandflashstreamingdrier 4 formation, the wet stock of Rotatingandflashstreamingdrier 4 disperses by this air-flow, and by the agitating device established in Rotatingandflashstreamingdrier 4, material is wherein pulverized, then send into double helix drier I 5 and carry out drying.That is: the hot gas risen at a high speed contacts with the wet stock entering Rotatingandflashstreamingdrier 4, and material is disperseed rapidly.The hot-air risen at a high speed in Rotatingandflashstreamingdrier 4 and wet stock carry out mass transfer, heat transfer, and most of moisture content of instant vaporization wet stock inside, the water yield that this process wet stock is discharged is large.And by agitating device set bottom Rotatingandflashstreamingdrier 4, larger particles is rolled into a ball the quick broken particulate that formed again of material, thus increase the specific area of material.This step needs the pressure reduction controlled in Rotatingandflashstreamingdrier 4 to be 0 ~-200mmH
2o tiny structure, specifically by regulating air blast and air-introduced machine air quantity, makes to form 0 ~-200mmH in machine hall
2o tiny structure.Such as, by regulating air blast 1 air quantity, air-introduced machine 7 and air-introduced machine 11 air quantity, make drying system form negative pressure, namely reduce material surface dividing potential drop, object reduces dry materials temperature.Because material is heat sensitive material for this reason, the boiling point of water is 100 DEG C, therefore need reduce the vapourizing temperature of water.But drying system negative pressure is comparatively large, can reduce material in the drying system stagnant time of staying, namely reduces material and hot-air carrier contact time, affect drying effect, so dry run is suitable for reducing material surface dividing potential drop, experiment proves drying system pressure reduction: 0 ~-200mmH
2o optimum.Under tiny structure, in Rotatingandflashstreamingdrier 4, form curve form at the bottom of air flow method ring and room by the control mixing speed of agitating device and the charging rate of charger 3, thus ensure that the drying effect of material.Show through a large amount of test repeatedly, when raw meal particle size is at 1 μm ~ 5mm, the delivery rate controlling charger 3 is 200-600 rev/min, and its drying effect can be made when the mixing speed of agitating device is 800-1500 rev/min better.
It is 60-140 DEG C that this step needs to control Rotatingandflashstreamingdrier 4 inlet temperature, and outlet temperature is 45-75 DEG C.In one embodiment, when pressure reduction is-20mmH
2during O tiny structure, flash dryer 4 inlet temperature is 80 DEG C, and outlet temperature is 45 DEG C.In another embodiment, flash dryer 4 inlet temperature is 85 DEG C, and outlet temperature is 58 DEG C.In another embodiment, when pressure reduction is-40mmH
2during O tiny structure, flash dryer 4 inlet temperature is 90 DEG C, and outlet temperature is 60 DEG C.When pressure reduction is-100mmH
2during O tiny structure, in another embodiment, when pressure reduction is-150mmH
2during O tiny structure, flash dryer 4 inlet temperature is 95 DEG C, and outlet temperature is 62 DEG C.In another embodiment, when pressure reduction is-200mmH
2during O tiny structure, flash dryer 4 inlet temperature is 110 DEG C, and outlet temperature is 65 DEG C.Show through a large amount of experiments, if Rotatingandflashstreamingdrier inlet temperature is less than 80 DEG C, be so difficult to material water ratio is dried to less than 1%, except non-reduced material treating capacity.The experiment proved that, if inlet temperature is less than 80 DEG C, device output reduces about 40%.And if Rotatingandflashstreamingdrier inlet temperature is greater than 120 DEG C, the material that so granularity is less plastifies because temperature is higher, changes original material properties, reduces its using function.Experiment proves, about has 20% plasticizing material to produce.
When charger 3 feed, the situation of reply Flow of Goods and Materials situation is monitored, and adjusts the delivery rate of charger 3 according to Real-Time Monitoring Flow of Goods and Materials situation in time.In a detailed description of the invention, can arrange a visor on Rotatingandflashstreamingdrier 4, can be observed material at rotary flashing drying room mobility status by visor, ordinary material flows and sticky visor at the visor first half, is normal condition.If material all covers visor, overcharge, should adjust inlet amount.This process can be adjusted by the approach of manual observation.But can bring the increase of cost of labor, and when manually there is fault such as, artificial not on dutyly or manually on duty do not observe the problem causing drying effect to be greatly affected in time, in order to head it off, by arranging a supervising device above visor, in real time visor is monitored, the information monitored and the information preset are compared, if do not met, then according to the inlet amount of the information adjustment charger 3 monitored.Such as, by the mode of IMAQ, in real time IMAQ is carried out to visor, the image of collection and the image prestored are compared and can carry out comparing of definition, if do not meet, overcharge is described, should inlet amount be adjusted.This step can realize intellectualized operation, both reduces cost, turn improves dry accuracy.
Step 40, bag filter I 6 will be sent into through the dried material of double helix drier I 5, and by dust-precipitator I 6 by material collection, then send into double helix drier II 8 and carry out drying.
Step 50, bag filter II 10 will be sent into through the dried material of double helix drier II 8, thus complete dry run.This step also comprises increases material and hot air area by the pulsed pneumatic drying pipe 9 be located between double helix drier II 8 and bag filter II 10, strengthens drying effect.
Wherein, namely the effect of double helix drier I 5 and double helix drier II 8 is the path increasing heat sensitive material, and double-cyclone drier I 5 and double helix drier II 8 are inside and outside sleeve structure, entrainment of warm air material enters urceolus and enters inner core again from bottom and extend the flowing heat transfer time that hot-air contacts with material from top, enter next procedure afterwards.
In above step, need to control steam pressure: 0.3 ~ 0.7MPa.
See Fig. 2, a kind of drying system stuck with paste with polyvinyl chloride reclaimed materials that the embodiment of the present invention provides, comprises air blast 1, vapor heat exchanger I 2, charger 3, Rotatingandflashstreamingdrier 4, double helix drier I 5, bag filter I 6, air-introduced machine 7, double helix drier II 8, bag filter II 10 and air-introduced machine 11; Air blast 1 connects Rotatingandflashstreamingdrier 4 by vapor heat exchanger I 2; Charger 3 is connected with Rotatingandflashstreamingdrier 4 import; The outlet of Rotatingandflashstreamingdrier 4 is connected with double helix drier I 5 import; Double helix drier I 5 outlet is connected with bag filter I 6 import, and bag filter I 61 exports and connects the import of double helix drier II 8, and another outlet connects air-introduced machine 7; Double helix drier II 81 exports and connects bag filter II 10, and another outlet connects air-introduced machine 11; Bag filter 10 exports and connects air-introduced machine 11.Agitating device is provided with bottom Rotatingandflashstreamingdrier 4.Double-cyclone drier I 5 and double helix drier II 8 are inside and outside sleeve structure, and charging aperture is at urceolus, and discharging opening is at inner core.
Composite drying unit adopts the pneumatic conveying drying mode of fluidization of solid.Air is by air blast 1 and the collaborative feeding drying system of air-introduced machine 7, and after vapor heat exchanger I 2 heats, enter drier host machine, form the air-flow risen at a high speed, drier host machine is made up of two parts: i.e. Rotatingandflashstreamingdrier 4 and double helix drier I 5.This hot-air contacts with the wet stock entered, and material is disperseed rapidly, and wherein larger cluster of grains forms particulate through the agitating device quick crashing of Rotatingandflashstreamingdrier 4 again, thus increases the specific area of material.The hot-air risen at a high speed in Rotatingandflashstreamingdrier 4 and double helix drier I 5 and wet stock carry out mass transfer, heat transfer, and make the water vapor in wet stock instantaneously, and complete first order drying, this grade of drying time is short, and the water yield that wet stock is discharged is large.The wet stock of quick gas-particle separation is positioned at bag filter I 6 exit through conveying worm and enters double helix drier II 8 and carry out drying, the inlet temperature being controlled double helix drier II 8 by vapor heat exchanger II 13 is: 45-65 DEG C, at this moment the water being dispersed into the polyvinyl chloride reclaimed materials powder inside of particulate has been not enough to whole wetting surface, moist surface reduces gradually, rate of drying reduces gradually, particle surface temperature raises gradually, and the temperature difference between hot-air reduces, until temperature is close or identical.The now moisture absorption of microparticle surfaces water and evaporation reaches balance, and rate of drying is zero, completes second level drying.Final material moisture content is lower than less than 1.0%.
The drying system of tradition paste polyvinyl chloride reclaimed materials does not have double helix drier, and without obvious air flow method ring etc., drying efficiency is low, the more difficult control of temperature.If temperature is slightly high, material easily plastifies sex change, affects product quality; If temperature is slightly low, often needing could qualified i.e. moisture content less than 1.0% by dry materials 2-3 moisture content.Therefore, traditional drying machine energy consumption is larger.
And in composite drying unit, temperature and the flow velocity of hot-air are reasonably controlled, the hot-air entering composite drying machine is fully mixed with the wet stock in high degree of dispersion shape, large water gaging at a lower temperature in wet stock shifts out fast, until material moisture reaches less than 1.0%, drying efficiency is high, and can reduce energy consumption.
Table 1 conventional dryer and composite drying machine indices contrast
| Leading indicator | Conventional air drying machine | Composite drying unit |
| The time h of dry 1t material butt | 14 | 6 |
| The steam consumption t of dry 1t material | 10 | 3 |
| The power consumption kwh of dry 1t material | 150 | 69 |
| Primary drying qualification rate % | 80 | 100 |
| Material final moisture content mean value % | 1.0 | 0.55 |
| Material recovery rate % | 93 | More than 99 |
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. stick with paste the drying means with polyvinyl chloride reclaimed materials, it is characterized in that, comprising:
By charger (3) to Rotatingandflashstreamingdrier (4) feeding;
Worked in coordination with air by sending into Rotatingandflashstreamingdrier (4) after vapor heat exchanger I (2) heating by air blast (1), air-introduced machine (7);
Micro-vacuum state is formed by regulating the air quantity of air blast (1), air-introduced machine (7) and air-introduced machine (11);
The air-flow risen at a high speed is formed by described Rotatingandflashstreamingdrier (4), the wet stock of described Rotatingandflashstreamingdrier (4) disperses by this air-flow, and by the agitating device established in described Rotatingandflashstreamingdrier (4), material is wherein pulverized, then send into double helix drier I (5) and carry out drying;
Drying will be carried out by feeding double helix drier II (8) after described double helix drier I (5) dried material feeding bag filter I (6) processes;
Bag filter II (10) will be sent into through the dried material of described double helix drier II (8), thus complete dry run.
2. drying means according to claim 1, is characterized in that, also comprises: the pressure reduction controlled in described Rotatingandflashstreamingdrier (4) is 0 ~-200mmH
2o tiny structure; Controlling described Rotatingandflashstreamingdrier (4) inlet temperature is 60-140 DEG C, and outlet temperature is 45-75 DEG C.
3. drying means according to claim 1, is characterized in that, also comprises: control steam pressure is 0.3 ~ 0.7MPa.
4. drying means according to claim 1, it is characterized in that, also comprise: under tiny structure, according to the inlet amount of material particular diameter size adjustment Rotatingandflashstreamingdrier (4) and the rotary speed of control whirligig, Rotatingandflashstreamingdrier (4) material is enable to form curve form at the bottom of air flow method ring and room.
5. drying means according to claim 1, is characterized in that, also comprises: the charging rate adjusting charger (3) according to Real-Time Monitoring Flow of Goods and Materials situation in time.
6. drying means according to claim 1, it is characterized in that, also comprise: by being located at the pulsed pneumatic drying pipe (9) between double helix drier II (8) and bag filter II (10), to increase material and hot air area.
7. realize the system of method described in any one of claim 1-6, it is characterized in that: comprise air blast (1), vapor heat exchanger I (2), charger (3), Rotatingandflashstreamingdrier (4), double helix drier I (5), bag filter I (6), air-introduced machine (7), double helix drier II (8), bag filter II (10) and air-introduced machine (11); Described air blast (1) connects described Rotatingandflashstreamingdrier (4) by described vapor heat exchanger I (2); Described charger (3) is connected with Rotatingandflashstreamingdrier (4) import; The outlet of described Rotatingandflashstreamingdrier (4) is connected with double helix drier I (5) import; Described double helix drier I (5) outlet is connected with bag filter I (6) import, described bag filter I (6) exports and connects the import of double helix drier II (8), and another outlet connects described air-introduced machine (7); Described double helix drier II (8) exports and connects bag filter II (10), and another outlet connects air-introduced machine (11).
8. drying system according to claim 7, is characterized in that: described Rotatingandflashstreamingdrier (4) bottom is provided with agitating device.
9. drying system according to claim 7, is characterized in that: described double-cyclone drier I (5) and double helix drier II (8) are inside and outside sleeve structure, and charging aperture is at urceolus, and discharging opening is at inner core.
10. drying system according to claim 7, is characterized in that: be provided with pulsed pneumatic drying pipe (9) between described double helix drier II (8) and bag filter II (10).
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| CN201510908398.3A CN105352267A (en) | 2015-12-09 | 2015-12-09 | Drying method and system for paste polyvinyl chloride recycled material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107606892A (en) * | 2017-11-10 | 2018-01-19 | 重庆市贵金象炭黑有限责任公司 | A kind of high temperature drying device |
| CN110307706A (en) * | 2019-06-19 | 2019-10-08 | 镇江市高等专科学校 | A kind of plant medicine crude product extracts and drying unit |
| CN113883880A (en) * | 2021-10-14 | 2022-01-04 | 格林爱科(荆门)新能源材料有限公司 | Drying and ventilating system |
| CN115615142A (en) * | 2022-09-28 | 2023-01-17 | 常州卓升干燥设备有限公司 | Shaftless stirring and conveying device and flash evaporation drying equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606892A (en) * | 2017-11-10 | 2018-01-19 | 重庆市贵金象炭黑有限责任公司 | A kind of high temperature drying device |
| CN110307706A (en) * | 2019-06-19 | 2019-10-08 | 镇江市高等专科学校 | A kind of plant medicine crude product extracts and drying unit |
| CN113883880A (en) * | 2021-10-14 | 2022-01-04 | 格林爱科(荆门)新能源材料有限公司 | Drying and ventilating system |
| CN115615142A (en) * | 2022-09-28 | 2023-01-17 | 常州卓升干燥设备有限公司 | Shaftless stirring and conveying device and flash evaporation drying equipment |
| CN115615142B (en) * | 2022-09-28 | 2024-03-01 | 常州卓升干燥设备有限公司 | Shaftless stirring conveying device and flash evaporation drying equipment |
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Application publication date: 20160224 |