CN212658031U - Mechanical vapor recompression MVR heat pump drying system - Google Patents
Mechanical vapor recompression MVR heat pump drying system Download PDFInfo
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- CN212658031U CN212658031U CN202021205234.7U CN202021205234U CN212658031U CN 212658031 U CN212658031 U CN 212658031U CN 202021205234 U CN202021205234 U CN 202021205234U CN 212658031 U CN212658031 U CN 212658031U
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- 238000001035 drying Methods 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000007789 gas Substances 0.000 claims description 51
- 238000000746 purification Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 5
- 239000002918 waste heat Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The embodiment of the utility model provides a material drying technology field provides a mechanical vapor recompression MVR heat pump drying system. The embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system, include: the desicator, steam compressor, condensate tank and circulating fan, the first export of desicator and steam compressor's access connection, steam compressor's export and the first access connection of desicator, the second export of desicator and the access connection of condensate tank, the first export of condensate tank and circulating fan's access connection, circulating fan's export and the first access connection of desicator, so that the desicator, condensate tank and circulating fan form circulation loop, make wet material through behind the dry noncondensable gas entering condensate tank that produces of desicator, arrange into in the desicator through circulating fan. The embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system has improved the heat exchange efficiency of desicator.
Description
Technical Field
The utility model relates to a material drying technology field especially relates to a mechanical vapor recompression MVR heat pump drying system.
Background
The material drying relates to a plurality of fields such as chemical industry, pharmacy, mining, food, environmental protection, and the like, and is not only an indispensable basic link in industrial and agricultural production, but also a main energy consumption link. Drying is used as a process of net expenditure of energy, generally, air is used as a medium, primary energy, electric heating and the like are used as heat sources, and low-humidity hot air and wet materials are used for heat and moisture exchange to take away moisture in the materials. The whole drying process is high in energy consumption, the energy consumption reaches 3200-3500 kJ/kg of water, 45-90 kW/ton of water is consumed, a large amount of drying tail gas is further processed, and the material processing cost and the system complexity are increased.
MVR (mechanical vapor compression) is a shorthand for mechanical vapor recompression technology. A traditional mechanical vapor recompression MVR heat pump drying system adopts a form of direct vapor compression. However, in the drying process, part of materials are complex in components and easily generate volatile substances, and the volatile substances overflow along with secondary steam and finally enter the dryer again, so that the content of non-condensable gas in the system is increased, and the heat exchange efficiency of the dryer and the stability of system operation are reduced. Therefore, the heat exchange efficiency of the dryer is improved, and the heat exchange efficiency is very important for improving the energy utilization rate of the mechanical vapor recompression MVR heat pump drying system.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the desiccator heat exchange efficiency is low, the system energy consumption is high that the incondensable gas accumulation arouses in the desiccator that exists among the prior art, the embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system.
According to the utility model discloses an embodiment, mechanical vapor recompression MVR heat pump drying system includes: the dryer comprises a dryer, a steam compressor, a condensate tank and a circulating fan, wherein a first outlet of the dryer is connected with an inlet of the steam compressor, an outlet of the steam compressor is connected with a first inlet of the dryer, a second outlet of the dryer is connected with an inlet of the condensate tank, a first outlet of the condensate tank is connected with an inlet of the circulating fan, and an outlet of the circulating fan is connected with a first inlet of the dryer, so that the dryer, the condensate tank and the circulating fan form a circulating loop, and non-condensable gas generated after wet materials are dried by the dryer enters the condensate tank and then is discharged into the dryer through the circulating fan.
According to the utility model discloses an embodiment, the first export of condensate tank through first pipeline with circulating fan's entry linkage.
According to the utility model discloses an embodiment, be provided with first governing valve on the first pipeline.
According to an embodiment of the present invention, the mechanical vapor recompression MVR heat pump drying system further comprises a feeding conveyor, a first inlet of the feeding conveyor is used for receiving wet materials, and a second inlet of the feeding conveyor is connected with a second outlet of the condensate tank, so as to discharge condensate to the feeding conveyor for waste heat recovery; the first outlet of the feed conveyor is connected to the second inlet of the dryer and the second outlet of the feed conveyor is used for draining the condensate.
According to the utility model discloses an embodiment, mechanical vapor recompression MVR heat pump drying system still includes secondary vapor purification device, secondary vapor purification device's entry with the first exit linkage of desicator, secondary vapor purification device's export pass through the second pipeline with vapor compressor's entry linkage.
According to the utility model discloses an embodiment, mechanical vapor recompression MVR heat pump drying system still includes exhaust fan, exhaust fan's entry is passed through the third tube coupling and is in on the second pipeline, exhaust fan's export is used for discharging noncondensable gas.
According to the utility model discloses an embodiment, be provided with the second governing valve on the third pipeline.
According to the utility model discloses an embodiment, mechanical vapor recompression MVR heat pump drying system still includes the discharge conveyor, the entry of discharge conveyor with the third exit linkage of desicator, the export of discharge conveyor is used for passing through dry material after the desicator is dry discharges.
According to an embodiment of the present invention, the dryer is any one of a hollow blade dryer, a disc dryer, a tube bundle dryer, or a scraper dryer.
According to an embodiment of the invention, the steam compressor is any one of a screw-type steam compressor, a roots-type steam compressor or a centrifugal steam compressor.
The embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system through set up circulating fan in heat pump drying system, has solved noncondensable gas and has accumulated the problem that causes desicator heat exchange efficiency low on the desicator surface, has improved the heat exchange efficiency of desicator, and then has improved heat pump drying system's heat exchange efficiency, has improved heat pump drying system's economic nature and operating stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system's schematic structure diagram.
Description of reference numerals:
1-a dryer; 2-a circulating fan; 3-a condensate tank; 4-secondary steam purification device; 5-a vapor compressor; 6-an exhaust fan; 7-a feed conveyor; 8-a discharge conveyor; 11-a first conduit; 12-a second conduit; 13-a third line; 21-a first regulating valve; 22-second regulating valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, unless otherwise specified, "plurality", and "plural" mean two or more, and "several", and "several groups" mean one or more.
Referring now to fig. 1, an embodiment of the present invention will be described. It should be understood that the following description is only exemplary of the present invention and does not constitute any particular limitation of the present invention.
As shown in fig. 1, in an embodiment of the present invention, a mechanical vapor recompression MVR heat pump drying system includes: the system comprises a dryer 1, a vapor compressor 5, a condensate tank 3 and a circulating fan 2. Specifically, the wet material is heated in the drying chamber of the dryer 1, the generated secondary steam and the non-condensable gas formed by the material decomposition by heating enter the steam compressor 5, and the secondary steam is compressed into high-temperature and high-pressure steam which enters the heat flow side of the dryer 1 together with the non-condensable gas. The high-temperature and high-pressure steam and the wet materials form condensate after heat exchange, and the non-condensable gas and the condensate are discharged from the dryer 1 into the condensate tank 3 together because the non-condensable gas is difficult to condense. In order to prevent the non-condensable gas in the dryer 1 from stagnating on the heat exchange surface of the dryer 1 and affecting the heat exchange effect, the non-condensable gas is discharged into the dryer 1 from the condensate tank 3 under the driving of the circulating fan 2 to disturb the non-condensable gas on the heat exchange surface of the dryer 1, and further the heat exchange efficiency of the dryer 1 is improved.
Further, the noncondensable gas that the material pyrolysis produced is driven by circulating fan 2 and is got into in the desicator 1 from the condensate tank 3, and the noncondensable gas that flows causes the disturbance to the noncondensable gas that gathers at the heat transfer surface of desicator 1 in the desicator 1, and then reduces the accumulation of noncondensable gas on the surface of desicator 1. Circulating fan 2, desicator 1 and condensate tank 3 establish ties in proper order and form circulation circuit, can keep the mobility of the noncondensable gas in the desicator 1 constantly, have reduced the accumulation of noncondensable gas on 1 heat transfer surface of desicator, have improved the heat exchange efficiency of desicator 1, and then have improved the heat exchange efficiency of mechanical vapor recompression MVR heat pump drying system.
The secondary steam generated by drying the material in the dryer 1 is discharged into the secondary steam purification device 4 from the first outlet of the dryer 1, so that the secondary steam is purified. And the dry material with the water content meeting the requirement is discharged from a third outlet of the dryer 1 into the discharging conveyor 8 and then is discharged out of the heat pump drying system.
Further, the dryer 1 may be any one of a hollow blade dryer, a disc dryer, a tube bundle dryer or a scraper dryer, and in an embodiment of the present invention, is optionally a hollow blade dryer.
It will of course be appreciated that the form of the dryer 1 is merely illustrative and that alternative types of dryer may be used in the present invention. This may be done according to the specific use case, and the present invention is not limited thereto.
In an embodiment of the present invention, the circulation fan 2 is optionally a high temperature and high pressure fan.
Further, in an embodiment of the present invention, the vapor compressor 5 may be any one of a screw type vapor compressor, a roots type vapor compressor, or a centrifugal type vapor compressor. It will of course be appreciated that the form of the vapour compressor 5 is merely illustrative and that alternative types of vapour compressor may be used in the present invention. This may be done according to the specific use case, and the present invention is not limited thereto.
The embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system through set up circulating fan in heat pump drying system, has solved noncondensable gas and has accumulated the problem that causes desicator heat exchange efficiency low on the desicator surface, has improved the heat exchange efficiency of desicator, and then has improved heat pump drying system's heat exchange efficiency, has improved heat pump drying system's economic nature and operating stability.
As shown in fig. 1, in an embodiment of the present invention, a first outlet of the condensate tank 3 is connected to an inlet of the circulating fan 2 through a first pipeline 11.
Specifically, the wet material is heated in the drying cavity of the dryer 1, the moisture is heated and evaporated, and the high-temperature condensate generated after heat exchange and the non-condensable gas generated in the drying process enter the condensate tank 3 through the second outlet of the dryer 1. The non-condensable gas flows into the circulating fan 2 through a first pipeline 11 through a first outlet of the condensed liquid tank 3; high-temperature condensate in the condensate tank 3 enters the feeding conveyor 7 through a second outlet of the condensate tank 3 to be used as a heat source for preheating wet materials, and then waste heat recovery of the condensate is realized.
Further, a first regulating valve 21 is provided on the first pipeline 11. When the non-condensable gas content in the heat pump drying system is higher, the non-condensable gas content entering the circulating fan 2 can be adjusted by adjusting the first adjusting valve 21, the accumulation of the non-condensable gas in the dryer 1 can be reduced, the heat exchange efficiency of the dryer 1 is further improved, and the stability of the heat pump drying system is ensured.
As shown in fig. 1, in an embodiment of the present invention, the mechanical vapor recompression MVR heat pump drying system further includes a feeding conveyor 7, a first inlet of the feeding conveyor 7 is used for receiving wet materials, and a second inlet of the feeding conveyor 7 is connected with a second outlet of the condensate tank 3, so as to discharge the condensate to the feeding conveyor 7 for waste heat recovery; a first outlet of the feed conveyor 7 is connected to a second inlet of the dryer 1 and a second outlet of the feed conveyor 7 is used for draining off condensate.
Specifically, wet materials enter the feeding conveyor 7 through a first inlet of the feeding conveyor 7, after heat exchange is carried out between the evaporative condensate and the wet materials, preheating of the wet materials is achieved, and the preheated materials enter a drying cavity of the dryer 1 through a first outlet of the feeding conveyor 7 to be dried. And a second inlet of the feeding conveyor 7 is connected with a second outlet of the condensing tank 3 so as to discharge high-temperature condensate in the condensing tank 3 into the feeding conveyor 7, preheat wet materials and realize waste heat recovery of the condensate. The condensate after heat exchange is discharged out of the heat pump drying system through a second outlet of the feeding conveyor 7, and the discharged condensate can be directly recycled or further treated so as to reduce the pollution to the environment.
Further, in an embodiment of the present invention, the feeding conveyor 7 is a heat exchange screw conveyor, and adopts a hollow blade and a jacket structure. It will of course be appreciated that the form of the feed conveyor 7 is merely illustrative and that alternative types of conveyors may be used in the present invention. This may be done according to the specific use case, and the present invention is not limited thereto.
As shown in fig. 1, in an embodiment of the present invention, the mechanical vapor recompression MVR heat pump drying system further includes a secondary vapor purification device 4, an inlet of the secondary vapor purification device 4 is connected to the first outlet of the dryer 1, and an outlet of the secondary vapor purification device 4 is connected to an inlet of the vapor compressor 5 through a second pipeline 12.
Specifically, wet materials are dried in a drying cavity of the dryer 1, generated secondary steam enters the secondary steam purification device 4 through a first outlet of the dryer 1, impurities such as dust entrained in the secondary steam are removed by the secondary steam purification device 4, and the purified secondary steam is discharged into the steam compressor 5 through a second pipeline 12 connected to the outlet. Meanwhile, after the non-condensable gas generated in the drying process enters the secondary steam purification device 4, the non-condensable gas can be discharged into the exhaust fan 6 through the third pipeline 13 connected to the second pipeline 12 and then discharged out of the heat pump drying system, and the discharged non-condensable gas can be further processed to avoid environmental pollution.
Further, a second regulating valve 22 is provided on the third pipeline 13. Along with the increase of the content of the non-condensable gas in the mechanical vapor recompression MVR heat pump drying system, the content of the non-condensable gas in the discharge system can be adjusted by adjusting the second adjusting valve 22, the accumulation of the non-condensable gas in the dryer 1 is reduced, and the stability of the system operation is ensured. As shown in fig. 1, in an embodiment of the present invention, the mechanical vapor recompression MVR heat pump drying system further includes an exhaust fan 6, an inlet of the exhaust fan 6 is connected to the second pipeline 12 through a third pipeline 13, and an outlet of the exhaust fan 6 is used for discharging noncondensable gas.
Specifically, the inlet of the exhaust fan 6 is connected to the outlet of the secondary steam purification device 4 through a third pipe 13 and a second pipe 12. In the noncondensable gas in the secondary steam purification device 4 gets into exhaust fan 6 through second pipeline 12 and third pipeline 13, arrange a small amount of noncondensable gas outward regularly through exhaust fan 6, can make the inside dynamic balance that reaches of mechanical vapor recompression MVR heat pump drying system, improved the stability of mechanical vapor recompression MVR heat pump drying system operation.
Further, in an embodiment of the present invention, optionally, the exhaust fan 6 is a high temperature and high pressure fan.
As shown in fig. 1, in an embodiment of the present invention, the mechanical vapor recompression MVR heat pump drying system further includes a discharging conveyor 8, an inlet of the discharging conveyor 8 is connected to a third outlet of the dryer 1, and an outlet of the discharging conveyor 8 is used for discharging the dry material dried by the dryer 1.
Specifically, after the material is dried in the dryer 1, the dry material meeting the moisture content requirement is discharged to the discharging conveyor 8 through the third outlet of the dryer 1, and then is discharged out of the heat pump drying system through the outlet of the discharging conveyor 8. Further, in an embodiment of the present invention, optionally, the discharging conveyor 8 is a screw conveyor. It will of course be appreciated that the form of the outfeed conveyor 8 is merely illustrative and that alternative types of conveyors may be used in the present invention. This may be done according to the specific use case, and the present invention is not limited thereto.
The embodiment of the utility model provides a mechanical vapor recompression MVR heat pump drying system reasonable in design, simple structure can realize full process automation control. Through setting up circulating fan, solved noncondensable gas and accumulated the problem that reduces desicator heat exchange efficiency at desicator heat transfer surface, improved the economic nature and the operating stability of system.
The following specific examples illustrate in detail the working principle of the mechanical vapor recompression MVR heat pump drying system provided by the embodiment of the present invention:
the wet material enters the feed conveyor 7 to exchange heat with the evaporative condensate to preheat the wet material. The wet material after preheating gets into and heats the drying in the desicator 1, and the secondary steam that produces among the drying process and noncondensable gas get into impurity such as dust secretly in the secondary steam purifier 4 through the second export of desicator 1 and carry out purification treatment, and secondary steam after the processing and noncondensable gas get into vapor compressor 5 through second pipeline 12 in, compress the secondary steam into the high-temperature high-pressure steam and get into to the heat flow side of desicator 1, as the heat source of dry material.
High-temperature condensate and entrained non-condensable gas formed by heat exchange of high-temperature and high-pressure steam and wet materials in the dryer 1 enter the condensate tank 3 through a first outlet of the dryer 1. In order to prevent that the noncondensable gas stagnation from at the heat transfer surface of desicator 1, influence heat exchange efficiency, the noncondensable gas in the condensate tank 3 gets into circulating fan 2 through first pipeline 11, in first entry entering desicator 1 through desicator 1 under circulating fan 2's drive, the noncondensable gas that flows gathers in 1 heat transfer surface of desicator in to desicator 1 causes the disturbance, the accumulation of 1 heat transfer surface noncondensable gas of desicator has been reduced, and then the heat transfer efficiency of desicator 1 has been improved.
When the content of the non-condensable gas in the heat pump drying system is higher, the content of the non-condensable gas entering the dryer 1 through the circulating fan 2 can be reduced by adjusting through the first adjusting valve 21 arranged on the first pipeline 11. Meanwhile, the second regulating valve 22 connected to the third pipeline 13 can be regulated, a small amount of non-condensable gas can be discharged periodically through regulating the second regulating valve 22 through the exhaust fan 6, accumulation of the non-condensable gas in the heat pump drying system is reduced, and the discharged non-condensable gas can be further processed to reduce pollution of the gas to the environment.
The dry material with the moisture content meeting the requirement enters the discharging conveyor 8 through the third outlet of the dryer 1, and is discharged through the outlet of the discharging conveyor 8.
High-temperature condensate in the condensate tank 3 enters the feeding conveyor 7 through a second outlet of the condensate tank 3 to preheat wet materials, the condensate after heat exchange is discharged from a second outlet of the feeding conveyor 7, and the discharged condensate can be directly recycled or further processed. The embodiment of the utility model provides a heat pump drying system retrieves or retreats through noncondensable gas, the condensate to the discharge system is outer, has reduced the pollution to the environment, and the environmental protection benefit is very considerable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a mechanical vapor recompression MVR heat pump drying system which characterized in that includes: the dryer comprises a dryer, a steam compressor, a condensate tank and a circulating fan, wherein a first outlet of the dryer is connected with an inlet of the steam compressor, an outlet of the steam compressor is connected with a first inlet of the dryer, a second outlet of the dryer is connected with an inlet of the condensate tank, a first outlet of the condensate tank is connected with an inlet of the circulating fan, and an outlet of the circulating fan is connected with a first inlet of the dryer, so that the dryer, the condensate tank and the circulating fan form a circulating loop, and non-condensable gas generated after wet materials are dried by the dryer enters the condensate tank and then is discharged into the dryer through the circulating fan.
2. The Mechanical Vapor Recompression (MVR) heat pump drying system of claim 1, wherein a first outlet of the condensate tank is connected with an inlet of the circulating fan through a first pipeline.
3. The mechanical vapor recompression MVR heat pump drying system of claim 2, wherein a first regulating valve is disposed on the first pipeline.
4. The Mechanical Vapor Recompression (MVR) heat pump drying system of claim 2, further comprising a feed conveyor, a first inlet of the feed conveyor is used for receiving wet material, and a second inlet of the feed conveyor is connected with a second outlet of the condensate tank to discharge condensate to the feed conveyor for waste heat recovery; the first outlet of the feed conveyor is connected to the second inlet of the dryer and the second outlet of the feed conveyor is used for draining the condensate.
5. The Mechanical Vapor Recompression (MVR) heat pump drying system according to any one of claims 1 to 4, further comprising a secondary vapor purification device, wherein an inlet of the secondary vapor purification device is connected with the first outlet of the dryer, and an outlet of the secondary vapor purification device is connected with an inlet of the vapor compressor through a second pipeline.
6. The Mechanical Vapor Recompression (MVR) heat pump drying system of claim 5, further comprising an exhaust fan, wherein an inlet of the exhaust fan is connected to the second pipeline through a third pipeline, and an outlet of the exhaust fan is used for exhausting non-condensable gas.
7. The mechanical vapor recompression MVR heat pump drying system of claim 6, wherein a second regulating valve is disposed on the third pipeline.
8. The Mechanical Vapor Recompression (MVR) heat pump drying system of claim 1, further comprising an outfeed conveyor having an inlet connected to the third outlet of the dryer, the outlet of the outfeed conveyor being for discharging dried material dried by the dryer.
9. The mechanical vapor recompression MVR heat pump drying system of claim 1, wherein the dryer is any one of a hollow blade dryer, a tray dryer, a tube bundle dryer or a scraper dryer.
10. The mechanical vapor recompression MVR heat pump drying system of claim 1, wherein the vapor compressor is any one of a screw type vapor compressor, a Roots type vapor compressor or a centrifugal type vapor compressor.
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| CN202021205234.7U CN212658031U (en) | 2020-06-24 | 2020-06-24 | Mechanical vapor recompression MVR heat pump drying system |
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| CN202021205234.7U CN212658031U (en) | 2020-06-24 | 2020-06-24 | Mechanical vapor recompression MVR heat pump drying system |
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