CN203489598U - Hopper type vacuum drying equipment - Google Patents
Hopper type vacuum drying equipment Download PDFInfo
- Publication number
- CN203489598U CN203489598U CN201320595443.0U CN201320595443U CN203489598U CN 203489598 U CN203489598 U CN 203489598U CN 201320595443 U CN201320595443 U CN 201320595443U CN 203489598 U CN203489598 U CN 203489598U
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- Prior art keywords
- vacuum chamber
- valve
- hopper
- feed bin
- vacuum
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- Expired - Lifetime
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- 238000001291 vacuum drying Methods 0.000 title abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 60
- 239000002994 raw material Substances 0.000 claims abstract description 43
- 238000012856 packing Methods 0.000 claims description 46
- 238000007599 discharging Methods 0.000 claims description 30
- 238000000605 extraction Methods 0.000 claims description 19
- 230000000740 bleeding effect Effects 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 11
- 238000005273 aeration Methods 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 5
- 238000009835 boiling Methods 0.000 abstract description 3
- 229920006351 engineering plastic Polymers 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 11
- 238000012545 processing Methods 0.000 description 5
- 238000005453 pelletization Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000015220 hamburgers Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000004792 oxidative damage Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The utility model belongs to the technical field of drying equipment, and particularly relates to hopper type vacuum drying equipment which is used for drying treatment of tail end raw materials of an engineering plastic extruder. The hopper type vacuum drying equipment solves the problems that raw material performance is damaged, the dryness requirement of the raw materials can not be accurately controlled easily, efficiency is low and energy consumption is high in existing drying equipment. The vacuum drying mode is adopted, the boiling point of water in plastics of a vacuum chamber can be lowered along with increase of the vacuum degree, water molecules are boiled to be turned into vapor to overflow from a liquid state, the vapor is pumped out of the chamber through a vacuum pump, and thus the drying purpose can be achieved. Vacuum drying is low-temperature drying, the original performance of the materials can be reflected through a drying result, and the dryness requirement of the raw materials can be further accurately controlled. Compared with an existing drying treatment method, the efficiency is improved by more than 80%, and the fractional energy saving rate is larger than 90%.
Description
Technical field
The utility model belongs to drying equipment technical field, the hopper-type vacuum dryer that specifically a kind of end raw material drying for engineering plastics extruder is processed.
Background technology
At present, engineering plastics raw material is extruded the drying method after pelletizing, comprising: (1) ebullated bed heated-air drying, the domestic the method that generally adopts, shortcoming is dry material performance to be produced to oxidative damage simultaneously, high power electrothermal and blowing efficiency of initiation is low and energy consumption is huge; (2) infrared heating is dry, and German triumphant grace Burger KREYENBORG adopts the method, although than fluidized drying saving energy 50% left and right on year-on-year basis, but still belongs to conventional high-temperature drying mode; (3) centrifugal drying, the method belongs to the thick drying mode of low side, cannot meet aridity is required to high material, for example hygroscopic materials.
Summary of the invention
The purpose of this utility model is to provide a kind of hopper-type vacuum dryer, has solved damage material performance that existing drying equipment exists, has been difficult to accurately control the problems such as raw material drying degree requires and efficiency is low, energy consumption is high.
Realize the purpose of this utility model technical scheme: a kind of hopper-type vacuum dryer, comprise vacuum chamber, raw material cabin, packing feed bin, spiral blower fan, vavuum pump unit, vacuum chamber is communicated with negative-pressure pipeline by means of vacuum chamber material loading extraction valve, packing feed bin is communicated with negative-pressure pipeline by means of packing feed bin material loading extraction valve, and the air inlet of vortex fan is communicated with negative-pressure pipeline; Raw material cabin is communicated with one end of material loading pipeline by means of the raw material cabin outlet valve to be dried of raw material cabin lower end, and vacuum chamber is communicated with the other end of material loading pipeline by means of vacuum chamber inlet valve; Vacuum chamber is communicated with vacuum pipe one end by means of vacuum chamber air bleeding valve, and vavuum pump unit is communicated with the vacuum pipe other end by means of vacuum flapper valve; Vacuum chamber is connected with discharge pipe one end by means of vacuum chamber outlet valve, and packing feed bin is connected with the discharge pipe other end by means of packing feed bin inlet valve.
Described vacuum chamber, the upper end cover of vacuum chamber main body is ball top flange shape, on sphere, Vertical Uniform distributes and welds the adpting flange of difference in functionality and size, adpting flange connects respectively charging interface, exhaust port, discharging tonifying Qi interface, the material loading interface of bleeding, charging interface is installed vacuum chamber inlet valve, exhaust port is installed vacuum chamber air bleeding valve, on discharging tonifying Qi interface, discharging aeration valve is installed, and material loading is bled on interface material loading extraction valve is installed; Vacuum chamber main body is sleeve-shaped, and the lower end of vacuum chamber main body is hopper shape, on the discharging interface of vacuum chamber main body lower end, vacuum chamber outlet valve is installed; Between the upper end cover of ball top flange shape and the flange of vacuum chamber main body, for " 0 " type circle mode that is tightly connected, by ball top clamp bolt, be fixed.
Described raw material cabin, raw material cabin lower end is hopper shape, on the raw material cabin discharging interface of raw material cabin lower end, raw material cabin outlet valve is installed.
Described packing feed bin, installation kit charging hopper charging interface and the packing feed bin material loading interface of bleeding on the upper end cover of packing feed bin, installation kit charging hopper inlet valve on packing feed bin charging interface, the packing feed bin material loading installation kit charging hopper material loading extraction valve on interface of bleeding, packing feed bin lower end is hopper shape, installation kit charging hopper baiting valve on the packing feed bin emptying port of packing feed bin lower end.
Described vacuum chamber, vacuum chamber main body is provided with level sensor.
Effect of the present utility model: hopper-type vacuum dryer and the contrast of traditional drying equipment, the technical data of its operation test shows, than the energy-conserving product of current global plastic processing industry market, also to save again the energy consumption of 50%-95%, the actual measuring and calculating of energy consumption for drying 0.02KWh/Kg (the highest energy-conservation quantizating index in world's plastic processing industry at present).The time of process of vacuum drying is the 1/3-1/8 of other drying mode, and can not make raw material that oxidation and degradation reaction occur.
Accompanying drawing explanation
Fig. 1 is hopper-type vacuum dryer structural representation of the present utility model;
In figure:
1. vavuum pump unit; 2. vortex fan; 3. pack feed bin baiting valve; 4. pack feed bin; 5. charge valve; 6.B vacuum chamber outlet valve; 7.B vacuum chamber clean-up port; 8. observation window; 9.B vacuum chamber main body; 10. charge valve; 11.A vacuum chamber outlet valve; 12.A vacuum chamber clean-up port; 13. observation windows; 14.A vacuum chamber main body; 15. raw material cabin outlet valves to be dried; 16. raw material cabins; 17.A vacuum chamber inlet valve; 18.A vacuum chamber air bleeding valve; 19.A discharging tonifying Qi filter screen; 20.A discharging aeration valve; 21.A material loading extraction valve; 22.A material loading dust filter screen; 23. ball top clamp bolts; 24.A level sensor; 25.B vacuum chamber inlet valve; 26.B vacuum chamber air bleeding valve; 27.B discharging tonifying Qi filter screen; 28.B discharging aeration valve; 29.B material loading extraction valve; 30.B material loading dust filter screen; 31.B level sensor; 32. packing feed bin inlet valves; 33. packing feed bin material loading extraction valves; 34. dust-filtering nets; 35. main pipe rail dust-filtering nets; 36. long-range transfer valves; 37. vavuum pump dust-filtering nets; 38. vacuum flapper valves; 39. negative-pressure pipelines; 40. material loading pipelines; 41. vacuum pipes; 42. discharge pipes.
The specific embodiment
Below in conjunction with embodiment, the utility model content is further described.
The utility model adopts vacuum drying mode, and in the plastics in vacuum chamber, the boiling point of water is along with vacuum improves and reduces, and hydrone changes into steam by liquid state boiling and overflows, outdoor by vavuum pump extraction, thereby reaches drying purpose.
As shown in Figure 1, A, B vacuum chamber main body 14,9 are all manufactured by 301 or 316 stainless steel materials.Vacuum chamber main body 14, 9 upper end cover is ball top flange shape, on sphere, Vertical Uniform distributes and welds the adpting flange of difference in functionality and size, adpting flange connects respectively charging interface, exhaust port, discharging tonifying Qi interface, the material loading interface of bleeding, charging interface is installed inlet valve 17, 25, exhaust port is installed vacuum chamber air bleeding valve 18, 26, on discharging tonifying Qi interface, discharging aeration valve 20 is installed, 28, discharging aeration valve 20, 28 entrance point and discharging tonifying Qi filter screen 19, 27 connect, be positioned at vacuum chamber main body 14, material loading dust filter screen 22 is installed in bleed one end of interface of material loading in 9, 30, be positioned at vacuum chamber main body 14, the bleed other end of interface of material loading outside 9 is installed material loading extraction valve 21, 29, vacuum chamber main body 14,9 is sleeve-shaped, and inside is minute surface requirement, argon arc welding polishing, glass window 8,13 and clean-up port 12,7 have been installed in vacuum chamber main body 14,9, and the material level interface in vacuum chamber main body 14,9 is installed level sensor 24,31.The lower end of vacuum chamber main body 14,9 is hopper shape, and hopper lowermost end is welded flange, and welded flange is connected with discharging interface, and vacuum chamber outlet valve 6,11 is installed on discharging interface; Charge valve 5,10 is installed in hopper side.Between the flange of the upper end cover of ball top flange shape and vacuum chamber main body 14,9, for " 0 " type circle mode that is tightly connected, by ball top clamp bolt 23, be fixed.Vacuum chamber is bolted on bracing frame, and frame bottom is contacted with ground by load-bearing caster, is convenient to mobile.Co-content does not determine that different material wall thickness requires (3-15mm) and dry disposal ability.
The upper end cover of packing feed bin 4 is flat-top shape, installation kit charging hopper charging interface and the packing feed bin material loading interface of bleeding above, installation kit charging hopper inlet valve 32 on packing feed bin charging interface, the packing feed bin material loading that is positioned at packing feed bin 4 bleed one end and the dust-filtering net 34 of interface is connected, is positioned at the packing feed bin material loading of packing outside feed bin 4 bleed interface the other end with pack feed bin material loading extraction valve 33 and be connected.Packing feed bin 4 lower ends are hopper shape, and hopper lowermost end is welded flange, and welded flange is connected with packing feed bin emptying port, installation kit charging hopper baiting valve on packing feed bin emptying port.
As shown in Figure 1, negative pressure transportation, comprise: A vacuum chamber, B vacuum chamber, vortex fan 2, packing feed bin 4, main pipe rail dust-filtering net 35, long-range transfer valve 36, negative-pressure pipeline 39, A vacuum chamber, B vacuum chamber is respectively by means of A, B vacuum chamber material loading extraction valve 21, 29 are communicated with negative-pressure pipeline 39, packing feed bin 4 is communicated with negative-pressure pipeline 39 by means of packing feed bin material loading extraction valve 33, the air inlet of vortex fan 2 is communicated with negative-pressure pipeline 39, main pipe rail dust-filtering net 35 is installed between vortex fan 2 and negative-pressure pipeline 39, long-range transfer valve 36 is installed on negative-pressure pipeline 39.
As shown in Figure 1, material loading is carried, comprise: raw material cabin 16, A vacuum chamber, B vacuum chamber and material loading pipeline 40, raw material cabin 16 is communicated with one end of material loading pipeline 40 by means of the raw material cabin outlet valve 15 to be dried of raw material cabin 16 lower ends, and A vacuum chamber, B vacuum chamber are communicated with the other end of material loading pipeline 40 by means of A, B vacuum chamber inlet valve 17,25 respectively.
As shown in Figure 1, vacuum handling, comprise: A vacuum chamber, B vacuum chamber, vavuum pump unit 1, vavuum pump dust-filtering net 37, vacuum flapper valve 38, vacuum pipe 41, A vacuum chamber, B vacuum chamber are communicated with vacuum pipe 41 one end by means of vacuum chamber air bleeding valve 18,26 respectively, vaccum pump motor drives vavuum pump work, vavuum pump unit 1 is communicated with vacuum pipe 41 other ends by means of vacuum flapper valve 38, and vavuum pump dust-filtering net 37 is installed between vavuum pump unit 1 and vacuum flapper valve 38.
As shown in Figure 1, discharging is carried, comprise: A vacuum chamber, B vacuum chamber, packing feed bin 4, discharge pipe 42, A vacuum chamber, B vacuum chamber are connected with discharge pipe 42 one end by means of vacuum chamber outlet valve 11,6 respectively, and packing feed bin 4 is connected with discharge pipe 42 other ends by means of packing feed bin inlet valve 32.
The course of work:
(1) feeding process
After plastic extruding pelletization, by level sensor 24, provide and start working after signal, vortex fan 2 starts, material loading extraction valve 21 is opened, the negative-pressure air-flow producing is delivered directly to A vacuum chamber by stainless steel raw material cabin 16 through raw material cabin outlet valve 15 and the vacuum chamber inlet valve 17 of opening by raw material to be dried, reaching level sensor 24 allows after setting value, stop to A vacuum chamber transferring raw material, and automatically close the vacuum chamber inlet valve 17 of A vacuum chamber, when A vacuum chamber is closed, automatic redirect is fed in raw material to B vacuum chamber, and logical action order is with identical to the reinforced process of A vacuum chamber.
(2) dry run
After being dried, A, B vacuum chamber are to atmosphere opening, and the discharging aeration valve 20,28 on A, B vacuum chamber is opened, and air, after discharging tonifying Qi screen pack 19,27 filters, enters A, B vacuum chamber through discharging aeration valve 20,28.
(3) discharging process
Vortex fan 2 starts, unpack feed bin material loading extraction valve 33 and long-range transfer valve 36 simultaneously, the negative-pressure air-flow producing is delivered to appointment packing feed bin 4 by A, B vacuum chamber through vacuum chamber outlet valve 11,6 and the packing feed bin inlet valve 32 of opening by dried raw material, when level sensor 24,31 provides settling signal, complete a complete cycle whole arid cycle, waits for next cycle period commencing signal;
A, the circulation of B vacuum chamber interval, alternation guarantee the continuous work for the treatment of state of drying equipment.
Vacuum chamber need to require particular design, customization according to user, and vacuum chamber will have large and small different processing capacity, and capacity is generally from 10 liters---1000 liters of scopes.
Long-range transfer valve 36 is can form negative pressure of vacuum by the terminal use's feed bin outside 10-100 rice after it is opened, raw material after the dry processing of this equipment is delivered directly to targeted customer, need not, additionally preparing induction system, only need this equipment blower fan to provide power+mono-valve just can easily realize.Object is to facilitate client, multi-functional machine.
On the electrical control cubicles panel of electrical control cubicles, be provided with total power light, the normal indicator lamp of input signal, the normal indicator lamp of output signal, duty alarm indication Assembled lamp, and total power switch and HMl man-machine interface.
The KF type clip all being required by high sealing between vacuum chamber, sensor, vacuum pipe, material loading pipeline, discharge pipe and negative-pressure pipeline and valve and sealing ring on-link mode (OLM).The control cables of all executing agencies and parts is connected with switch board and all adopts aviation plug connected mode.Circuit control system and vavuum pump, vortex fan are arranged in special-purpose switch board, by PLC+HMI+ material level, pressure, temperature sensor+driving magnetic valve+auxiliary reclay+control executing agency (motor, operated pneumatic valve), moved whole working cycle process, during work, have configuration picture directly to show the duty that they are different, operating personnel complete the data setting of technological process by the touch-screen (HMI) of switch board panel.Mode of operation can be selected manually or automatically.Automatic charging, automatic drying are processed, automatic remote is delivered to end user terminal.
Claims (9)
1. a hopper-type vacuum dryer, it is characterized in that: comprise vacuum chamber, raw material cabin, packing feed bin, spiral blower fan, vavuum pump unit, vacuum chamber is communicated with negative-pressure pipeline by means of vacuum chamber material loading extraction valve, packing feed bin is communicated with negative-pressure pipeline by means of packing feed bin material loading extraction valve, and the air inlet of vortex fan is communicated with negative-pressure pipeline; Raw material cabin is communicated with one end of material loading pipeline by means of the raw material cabin outlet valve to be dried of raw material cabin lower end, and vacuum chamber is communicated with the other end of material loading pipeline by means of vacuum chamber inlet valve; Vacuum chamber is communicated with vacuum pipe one end by means of vacuum chamber air bleeding valve, and vavuum pump unit is communicated with the vacuum pipe other end by means of vacuum flapper valve; Vacuum chamber is connected with discharge pipe one end by means of vacuum chamber outlet valve, and packing feed bin is connected with the discharge pipe other end by means of packing feed bin inlet valve.
2. a kind of hopper-type vacuum dryer as claimed in claim 1, it is characterized in that: described vacuum chamber, the upper end cover of vacuum chamber main body is ball top flange shape, on sphere, Vertical Uniform distributes and welds the adpting flange of difference in functionality and size, adpting flange connects respectively charging interface, exhaust port, discharging tonifying Qi interface, the material loading interface of bleeding, charging interface is installed vacuum chamber inlet valve, exhaust port is installed vacuum chamber air bleeding valve, on discharging tonifying Qi interface, discharging aeration valve is installed, material loading is bled on interface material loading extraction valve is installed; Vacuum chamber main body is sleeve-shaped, and the lower end of vacuum chamber main body is hopper shape, on the discharging interface of vacuum chamber main body lower end, vacuum chamber outlet valve is installed; Between the upper end cover of ball top flange shape and the flange of vacuum chamber main body, for " 0 " type circle mode that is tightly connected, by ball top clamp bolt, be fixed.
3. a kind of hopper-type vacuum dryer as claimed in claim 1, is characterized in that: described raw material cabin, raw material cabin lower end is hopper shape, on the raw material cabin discharging interface of raw material cabin lower end, raw material cabin outlet valve is installed.
4. a kind of hopper-type vacuum dryer as claimed in claim 1, it is characterized in that: described packing feed bin, installation kit charging hopper charging interface and the packing feed bin material loading interface of bleeding on the upper end cover of packing feed bin, installation kit charging hopper inlet valve on packing feed bin charging interface, the packing feed bin material loading installation kit charging hopper material loading extraction valve on interface of bleeding, packing feed bin lower end is hopper shape, installation kit charging hopper baiting valve on the packing feed bin emptying port of packing feed bin lower end.
5. a kind of hopper-type vacuum dryer as claimed in claim 2, is characterized in that: described vacuum chamber, vacuum chamber main body is provided with level sensor.
6. a kind of hopper-type vacuum dryer as claimed in claim 1, is characterized in that: main pipe rail dust-filtering net is installed between vortex fan and negative-pressure pipeline; Vavuum pump dust-filtering net is installed between vavuum pump unit and vacuum pipe.
7. a kind of hopper-type vacuum dryer as claimed in claim 1, is characterized in that: long-range transfer valve is installed on negative-pressure pipeline.
8. a kind of hopper-type vacuum dryer as claimed in claim 2, it is characterized in that: described vacuum chamber, material loading dust filter screen is installed in bleed one end of interface of the material loading that is positioned at vacuum chamber main body, is positioned at the bleed other end of interface of material loading outside vacuum chamber main body material loading extraction valve is installed; The entrance point of discharging aeration valve is connected with discharging tonifying Qi filter screen.
9. a kind of hopper-type vacuum dryer as claimed in claim 2, is characterized in that: described vacuum chamber, and vacuum chamber main body is provided with glass window and clean-up port, and the lower end of vacuum chamber main body is hopper shape, and charge valve is installed in hopper side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320595443.0U CN203489598U (en) | 2013-09-25 | 2013-09-25 | Hopper type vacuum drying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320595443.0U CN203489598U (en) | 2013-09-25 | 2013-09-25 | Hopper type vacuum drying equipment |
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| Publication Number | Publication Date |
|---|---|
| CN203489598U true CN203489598U (en) | 2014-03-19 |
Family
ID=50260424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320595443.0U Expired - Lifetime CN203489598U (en) | 2013-09-25 | 2013-09-25 | Hopper type vacuum drying equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN203489598U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976870A (en) * | 2015-06-26 | 2015-10-14 | 天津莱沃真空干燥设备制造有限公司 | Hopper type microwave vacuum composite dehumidification drying device |
| CN105352533A (en) * | 2015-12-07 | 2016-02-24 | 中国地质大学（北京） | Multifunctional vacuum experiment table |
| EP3194133A4 (en) * | 2014-09-16 | 2018-05-16 | Gala Industries, Inc. | Systems and methods for drying pellets and other materials |
| CN111811216A (en) * | 2020-07-17 | 2020-10-23 | 郑州中远干燥工程有限公司 | Continuous vacuum drying reaction device and system |
-
2013
- 2013-09-25 CN CN201320595443.0U patent/CN203489598U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3194133A4 (en) * | 2014-09-16 | 2018-05-16 | Gala Industries, Inc. | Systems and methods for drying pellets and other materials |
| CN104976870A (en) * | 2015-06-26 | 2015-10-14 | 天津莱沃真空干燥设备制造有限公司 | Hopper type microwave vacuum composite dehumidification drying device |
| CN105352533A (en) * | 2015-12-07 | 2016-02-24 | 中国地质大学（北京） | Multifunctional vacuum experiment table |
| CN105352533B (en) * | 2015-12-07 | 2018-10-09 | 中国地质大学（北京） | Multifunctional vacuum experimental bench |
| CN111811216A (en) * | 2020-07-17 | 2020-10-23 | 郑州中远干燥工程有限公司 | Continuous vacuum drying reaction device and system |
| CN111811216B (en) * | 2020-07-17 | 2022-02-01 | 郑州中远干燥工程有限公司 | Continuous vacuum drying reaction device and system |
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Granted publication date: 20140319 |
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Addressee: Liu Zhensui Document name: Notice of Termination of Patent Rights |
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