CN213543012U - Multistage heat pump drying parallel system - Google Patents
Multistage heat pump drying parallel system Download PDFInfo
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- CN213543012U CN213543012U CN202022517902.6U CN202022517902U CN213543012U CN 213543012 U CN213543012 U CN 213543012U CN 202022517902 U CN202022517902 U CN 202022517902U CN 213543012 U CN213543012 U CN 213543012U
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- 238000001035 drying Methods 0.000 title claims abstract description 92
- 238000005192 partition Methods 0.000 claims abstract description 32
- 238000007689 inspection Methods 0.000 claims description 8
- 239000011232 storage material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 18
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000002918 waste heat Substances 0.000 description 7
- 238000005338 heat storage Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 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 dry parallel system of multistage heat pump. The system comprises: the dryer comprises a drying chamber, an air return chamber and a buffer chamber which are sequentially arranged from bottom to top, a second partition plate is arranged between the drying chamber and the air return chamber, air return channels communicated with the drying chamber and the air return chamber are formed at two ends of the second partition plate, a circulating fan and a condenser of a heat pump unit are arranged in the air return chamber along the cross section of the air return chamber, the air return chamber and the buffer chamber are separated by a third partition plate, an air return valve and an exhaust valve are arranged on the third partition plate, and a fresh air valve is also arranged in the buffer chamber; the buffer chambers of the dryers are connected with the main machine chamber in parallel; a moisture exhaust valve is arranged in the main machine room. The utility model discloses a plurality of desicators parallel connection realize closed circuit formula circulation and the dry mode of operation of coupling of semi-open circulation in the host computer room for the material drying in each drying chamber is even, has improved drying efficiency.
Description
Technical Field
The utility model relates to a dry technical field of heat pump especially relates to a dry parallel system of multistage heat pump.
Background
In the drying process, the traditional drying system discharges a large amount of waste gas, and the waste gas contains a large amount of waste heat, so that the energy efficiency of the drying system is low, and the energy utilization rate is low. The heat pump system can recover latent heat and sensible heat in the waste gas in the drying process, and has the advantages of low energy consumption, high temperature and humidity control precision, high drying efficiency and the like. Therefore, the heat pump drying technology has significant advantages in the drying field.
In the prior art, a heat accumulating type heat pump drying system (application number: 201610607496.8) is disclosed, which adopts a similar dryer with a parallel air supply mode, and the patent proposes a heat accumulating device to buffer the recycling of waste heat in the drying process, but does not consider the drying uniformity of materials in a drying chamber, so that the materials at the tail part of the drying chamber are relatively difficult to dry, and the whole drying period is relatively prolonged.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a dry parallelly connected system of multistage heat pump for the difficult drying of material of drying chamber afterbody among the solution prior art has prolonged drying cycle's defect.
The embodiment of the utility model provides a pair of dry parallel system of multistage heat pump, include: a main machine room and a plurality of dryers separated by a first partition; wherein,
the dryer comprises a drying chamber, an air return chamber and a buffer chamber which are sequentially arranged from bottom to top, wherein a second partition plate is arranged between the drying chamber and the air return chamber, air return channels communicated with the drying chamber and the air return chamber are formed at two ends of the second partition plate, a circulating fan and a condenser of a heat pump unit are arranged in the air return chamber along the cross section of the air return chamber, the air return chamber and the buffer chamber are separated by a third partition plate, an air return valve and an exhaust valve are arranged on the third partition plate, and a fresh air valve is also arranged in the buffer chamber;
the buffer chamber of each dryer is connected in parallel with the main machine chamber;
and a moisture exhaust valve is arranged in the main machine room.
Wherein, the circulating fan is a positive and negative rotating fan.
Wherein, a shunting structure is arranged in the air return duct.
The flow dividing structure comprises a plurality of layers of arc-shaped flow guide plates with different radiuses, one end of each arc-shaped flow guide plate is communicated with the drying chamber, and the other end of each arc-shaped flow guide plate is communicated with the air return chamber.
Wherein, still include the fourth baffle, the return air valve with the exhaust valve sets up two sets ofly at least, the fourth baffle set up in the surge chamber and with the surge chamber is divided into for the return air side and the side of airing exhaust, the return air valve set up in the return air side, the exhaust valve set up in the side of airing exhaust.
The air exhaust duct is connected between the air exhaust side and the main machine room.
And a plurality of guide plates are arranged on one side of the third partition plate, which is close to the air return chamber, and the guide plates are uniformly arranged along the length direction of the third partition plate.
Wherein a heat storage material is provided in the main machine room.
The dryer further comprises a feeding door and an inspection door, wherein the feeding door is arranged on the dryer and is positioned on the other side relative to the main machine room, and the inspection door is arranged at two ends of the main machine room.
The embodiment of the utility model provides a pair of multistage heat pump drying parallel system falls into drying chamber, return air room and surge chamber through the baffle in the desicator, and a plurality of desicator parallel connection can realize the dry mode of operation of closed circuit formula circulation and semi-open circulation through opening and close of each blast gate in the host computer room, have avoided the uneven problem of energy consumption distribution of the emission recycle of used heat and system for the material drying in each drying chamber is even, has improved drying efficiency.
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 a top view of a multi-stage heat pump drying parallel system provided by the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1 when the circulating fan is rotated in the forward direction;
FIG. 3 is a sectional view taken along line A-A of FIG. 1 when the circulator blower is rotated reversely;
fig. 4 is a sectional view taken along line B-B in fig. 1.
Reference numerals:
1: a heat pump unit; 2: a condenser; 3: a circulating fan; 4: a second separator; 5: a fourth separator; 6: a first exhaust valve; 7: a second exhaust valve; 8: an exhaust duct; 9: a first return air valve; 10: a second return air valve; 11: a fresh air valve; 12: a moisture removal valve; 13: a feed gate; 14: an inspection door; 15: a drying chamber; 16: an air return chamber; 17: a main machine room; 18: a buffer chamber; 19: a flow splitting structure; 20: a baffle; 21: a first separator; 22: and a third partition plate.
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; the connection can be mechanical connection or point connection; 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.
A multi-stage heat pump drying parallel system according to an embodiment of the present invention is described below with reference to fig. 1 to 4, including: the dryer comprises a main machine room 17 and a plurality of dryers, wherein the plurality of dryers are separated by a first partition plate 21 and connected in parallel with the main machine room 17, and the respective dryers 15 independently operate without interfering with each other. The heat pump unit 1 is installed in the main room 17.
The dryer comprises a drying chamber 15, an air return chamber 16 and a buffer chamber 18 which are sequentially arranged from bottom to top, a second partition plate 4 is arranged between the drying chamber 15 and the air return chamber 16, air return channels communicated with the drying chamber 15 and the air return chamber 16 are formed at two ends of the second partition plate 4, a circulating fan 3 and a condenser 2 of a heat pump unit 1 are arranged in the air return chamber 16 along the cross section of the air return chamber, the air return chamber 16 and the buffer chamber 18 are separated by a third partition plate 22, an air return valve and an air exhaust valve are arranged on the third partition plate 22, and a fresh air valve 11 is further arranged in the buffer chamber 18. Specifically, the drying chamber 15 and the air return chamber 16 are communicated through air return ducts at two ends of the second partition plate 4, and air flow can directionally move to exchange heat with materials under the driving of the circulating fan 3. The condenser 2 in the air return chamber 16 is a part of the heat pump unit 1 (i.e. the condenser 2 of the heat pump unit 1), the fresh air valve 11 arranged in the buffer chamber 18 can be opened to make the outside air enter the buffer chamber 18, and the air is controlled by the exhaust valve and the air return valve to pass through the third partition 22, so as to flow between the air return chamber 16 and the buffer chamber 18.
The buffer chamber 18 of each dryer is connected in parallel with the main machine chamber 17. It is understood that a plurality of dryers are connected in parallel to the main room 17, specifically, the buffer room 18 is connected in parallel to the main room 17, and the temperature in the dryers is controlled by the heat pump unit 1 in the main room 17.
A moisture exhaust valve 12 is provided in the main machine room 17, and excess moisture in the main machine room 17 is exhausted through the moisture exhaust valve 12.
Further, a temperature and humidity sensor is arranged in the air return chamber 16, and the opening angles of the heat pump unit 1 and each air valve are adjusted according to the monitored temperature and humidity. The temperature of the drying chamber 15 can be adjusted by the heat pump unit 1 by adjusting the frequency of the compressor or by starting and stopping the compressor.
The humidity of the drying chamber 15 is regulated and controlled by an exhaust valve, a moisture exhaust valve 12, a fresh air valve 11 and an air return valve. Specifically, firstly, the exhaust valve and the return air valve are used for regulation, the evaporator of the heat pump unit 1 is used for removing moisture in air, and when the moisture cannot meet the humidity requirement of the drying chamber 15, the exhaust valve, the moisture exhaust valve 12 and the fresh air valve 11 are adjusted.
In the drying process, the drying sections of the dryers are generally in different stages, so that the waste heat of the dryers can be shared, the redundant waste heat of the dryer in the dehumidifying stage can be recycled by the preheating stage or the dryer with less waste heat, and the waste heat of the dryer in the preheating stage can be utilized and the waste heat of the dryer in the middle stage of drying can be fully utilized.
The embodiment of the utility model provides a pair of multistage heat pump drying parallel system falls into drying chamber 15, return air chamber 16 and surge chamber 18 through the baffle in the desicator, a plurality of desicator parallel connection are at host computer room 17, can realize the dry mode of operation of closed circuit formula circulation and semi-open circulation's coupling through opening and close of each blast gate, the uneven problem of energy consumption distribution of the emission recycle of having avoided used heat and system for the material drying in each drying chamber 15 is even, drying efficiency has been improved.
In one embodiment, the recycle fan 3 is a counter-rotating fan. As shown in fig. 2 and 3, arrows represent the flow directions of air when the circulation fan 3 is rotated in the normal direction and the reverse direction, respectively. The circulating fan 3 is adopted to switch forward and backward, so that the uniformity and the drying efficiency of material drying are improved, and the efficiency of the heat pump is improved.
In one embodiment, a flow dividing structure 19 is provided within the return air duct. Further, the flow dividing structure 19 includes a plurality of layers of arc-shaped flow guiding plates with different radii, one end of each arc-shaped flow guiding plate is communicated with the drying chamber 15, and the other end of each arc-shaped flow guiding plate is communicated with the air return chamber 16. Arc drainage plate is the multilayer design in this embodiment, and it not only can play the reposition of redundant personnel effect, adjusts the homogeneity of air current, also plays the drainage effect. The flow dividing structure 19 may also include flow dividing blades to adjust the direction of the airflow.
In one embodiment, the multistage heat pump drying parallel system further comprises a fourth partition plate 5, at least two sets of air return valves and air exhaust valves are arranged, the fourth partition plate 5 is arranged in the buffer chamber 18 and divides the buffer chamber 18 into an air return side and an air exhaust side, the air return valves are arranged on the air return side, and the air exhaust valves are arranged on the air exhaust side. It will be appreciated that the discharge of air from the return air chamber 16 to the discharge side of the buffer chamber 18 is controlled by the discharge valve, and the return of air from the buffer chamber 18 to the return side of the return air chamber 16 is controlled by the return valve, so that air return and discharge do not interfere with each other. The air return valves and the exhaust valves are respectively two groups, namely a first air return valve 9, a second air return valve 10, a first exhaust valve 6 and a second exhaust valve 7, which can adapt to two working states of positive and negative rotation of the circulating fan 3 (as shown in fig. 2 and 3), and the corresponding air return valves and the corresponding exhaust valves are opened (or closed) according to the running state of the circulating fan 3.
In one embodiment, the multi-stage heat pump drying parallel system further comprises an exhaust duct 8, and the exhaust duct 8 is connected between the exhaust side and the main cabinet 17. It will be appreciated that the main cabinet 17 is in communication with the dryer, and that air from the main cabinet 17 will enter the return side of the buffer chamber 18, while air from the exhaust side will be exhausted to the main cabinet 17 through the exhaust duct 8.
In one embodiment, a plurality of baffles 20 are disposed on the third partition 22 adjacent to the air return chamber 16, and the plurality of baffles 20 are disposed uniformly along the length of the third partition 22. The baffle 20 in this embodiment functions to introduce air from the return air chamber 16 into the buffer chamber 18, and the baffle 20 may be replaced by a fan.
In one embodiment, the dryer further comprises an inlet door 13 and an inspection door 14, wherein the inlet door 13 is arranged on the other side of the dryer relative to the main room 17, and the inspection door 14 is arranged at two ends of the main room 17. The feed gate 13 is opened, the material can enter the dryer from the feed gate 13, and the inspection gate 14 is used for daily inspection of the main room 17 by workers.
In one embodiment, a heat storage material is disposed in the main chamber 17 to regulate the temperature of the main chamber 17 during the drying process, wherein the heat storage material releases heat when the temperature in the main chamber 17 is low, and absorbs heat when the temperature in the main chamber 17 is high. When the humidity of the drying chamber 15 is strictly required, particularly in the moisturizing stage, the exhaust gas in the drying chamber 15 is required not to be discharged into the main machine chamber 17, which causes the temperature of the main machine chamber 17 to be sharply reduced, and the temperature change degree in the main machine chamber 17 can be reduced by adopting the heat storage material.
According to the embodiment of the utility model provides a still provide a working method according to dry parallel system of multistage heat pump of above-mentioned embodiment, include:
in the drying process, airflow in the drying chamber 15 directionally flows through the circulating fan 3, high-temperature air is changed into low-temperature high-humidity air after heat exchange with materials, the low-temperature high-humidity air enters the air return chamber 16, a part of air enters the buffer chamber 18 through the exhaust valve, the other part of air is exhausted to the main machine chamber 17, and the heat pump unit 1 cools and dehumidifies the air;
when closed-circuit circulation is adopted, the return air valve is opened, the fresh air valve 11 and the moisture exhaust valve 12 are closed, and the air entering the buffer chamber 18 enters the return air chamber 16 through the return air valve and is mixed with the air exhausted from the drying chamber 15;
when semi-open circulation is adopted, the return air valve, the fresh air valve 11 and the moisture exhaust valve 12 are opened, air cooled and dehumidified by the heat pump unit 1 passes through the moisture exhaust valve 12, outside air enters the buffer chamber 18 through the fresh air valve 11 and then enters the return air chamber 16 through the return air valve to be mixed with air exhausted from the drying chamber 15, and the mixed air is heated by the condenser 2 to continuously perform heat exchange with materials.
The closed-loop circulation and semi-open circulation coupling drying mode can be realized through the regulation and control of the heat pump unit 1 and each air valve, the drying efficiency is improved, the drying chambers 15 are connected in parallel in the main machine chamber 17, and the uniform drying of materials in the drying chambers 15 is guaranteed.
Further, according to the forward and reverse rotation states of the circulating fan 3, the multi-stage heat pump drying parallel system also has different working methods, specifically as follows:
as shown in fig. 2, the air flow is driven in the forward direction by the circulation fan 3, and the air in the drying chamber 15 flows in the clockwise direction. During the drying process, the second exhaust valve 7 and the second return valve 10 are in a closed state. The high temperature air and the material are subjected to heat and mass exchange, the high temperature air and the material are changed into low temperature high humidity air, the low temperature high humidity air enters the air return chamber 16 through the flow dividing structure 19, a part of the air enters the buffer chamber 18 through the first exhaust valve 6, enters the main machine chamber 17 through the exhaust duct 8, and is cooled and dehumidified by the heat pump unit 1. When the closed-loop circulation is adopted, the air in the buffer chamber 18 is discharged into the air return chamber 16 through the first air return valve 9, and is mixed with the air discharged from the drying chamber 15 in the air return chamber 16; when the semi-open type circulation mode is adopted, air cooled and dehumidified by the heat pump unit 1 is discharged to the external environment through the moisture discharge valve 12, the fresh air valve 11 is opened, and the external air is discharged into the air return chamber 16 through the first air return valve 9 of the buffer chamber 18 and is mixed with air discharged from the drying chamber 15. The mixed air is sent into the condenser 2 by the circulating fan 3, is wet-heated by the condenser 2 and the like, and the heated high-temperature air is discharged into the drying chamber 15 through the shunting structure 19 and is continuously subjected to heat and mass exchange with the materials.
As shown in fig. 3, the circulation fan 3 drives the air flow in reverse, and the air in the drying chamber 15 flows counterclockwise. During the drying process, the first exhaust valve 6 and the first return valve 9 are in a closed state. The high temperature air and the material are subjected to heat and mass exchange, the high temperature air and the material are changed into low temperature high humidity air, the low temperature high humidity air enters the air return chamber 16 through the flow dividing structure 19, a part of the air enters the buffer chamber 18 through the second exhaust valve 7, enters the main machine chamber 17 through the exhaust duct 8, and is cooled and dehumidified by the heat pump unit 1. When closed-loop circulation is adopted, air in the buffer chamber 18 is discharged into the air return chamber 16 through the second air return valve 10, and is mixed with air discharged from the drying chamber 15 in the air return chamber 16; when the semi-open type circulation mode is adopted, the air cooled and dehumidified by the heat pump unit 1 is discharged to the external environment through the moisture discharge valve 12, the fresh air valve 11 is opened, and the external air is discharged into the air return chamber 16 through the first air return valve 9 of the buffer chamber 18 and is mixed with the air discharged from the drying chamber 15. The mixed air is sent into the condenser 2 by the circulating fan 3, is wet-heated by the condenser 2 and the like, and the heated high-temperature air is discharged into the drying chamber 15 through the shunting structure 19 and is continuously subjected to heat and mass exchange with the materials.
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 (9)
1. A multi-stage heat pump drying parallel system, comprising: a main machine room and a plurality of dryers separated by a first partition; wherein,
the dryer comprises a drying chamber, an air return chamber and a buffer chamber which are sequentially arranged from bottom to top, wherein a second partition plate is arranged between the drying chamber and the air return chamber, air return channels communicated with the drying chamber and the air return chamber are formed at two ends of the second partition plate, a circulating fan and a condenser of a heat pump unit are arranged in the air return chamber along the cross section of the air return chamber, the air return chamber and the buffer chamber are separated by a third partition plate, an air return valve and an exhaust valve are arranged on the third partition plate, and a fresh air valve is also arranged in the buffer chamber;
the buffer chamber of each dryer is connected in parallel with the main machine chamber;
and a moisture exhaust valve is arranged in the main machine room.
2. The multi-stage heat pump drying parallel system according to claim 1, wherein the circulating fan is a counter-rotating fan.
3. The multi-stage heat pump drying parallel system according to claim 1, wherein a flow dividing structure is provided in the return air duct.
4. The multi-stage heat pump drying parallel system according to claim 3, wherein the flow dividing structure comprises a plurality of layers of arc-shaped flow guide plates with different radii, one end of each arc-shaped flow guide plate is communicated with the drying chamber, and the other end of each arc-shaped flow guide plate is communicated with the air return chamber.
5. The multi-stage heat pump drying parallel system according to claim 1, further comprising a fourth partition, wherein the air return valve and the air exhaust valve are provided in at least two sets, the fourth partition is provided in the buffer chamber and divides the buffer chamber into an air return side and an air exhaust side, the air return valve is provided in the air return side, and the air exhaust valve is provided in the air exhaust side.
6. The multi-stage heat pump drying parallel system according to claim 5, further comprising an exhaust duct connected between the exhaust side and the main cabinet.
7. The multi-stage heat pump drying parallel system as claimed in claim 1, wherein a plurality of baffles are provided at a side of the third partition plate adjacent to the air return chamber, and the plurality of baffles are uniformly provided along a length direction of the third partition plate.
8. The multiple stage heat pump drying parallel system as recited in claim 1 wherein a thermal storage material is disposed within said main machine chamber.
9. The multi-stage heat pump drying parallel system according to claim 1, further comprising a feeding gate provided to the dryer at the other side with respect to the main cabinet and an inspection gate provided to both ends of the main cabinet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022517902.6U CN213543012U (en) | 2020-11-04 | 2020-11-04 | Multistage heat pump drying parallel system |
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| CN202022517902.6U CN213543012U (en) | 2020-11-04 | 2020-11-04 | Multistage heat pump drying parallel system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229164A (en) * | 2020-11-04 | 2021-01-15 | 中国科学院理化技术研究所 | Multistage heat pump drying parallel system and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229164A (en) * | 2020-11-04 | 2021-01-15 | 中国科学院理化技术研究所 | Multistage heat pump drying parallel system and working method thereof |
| CN112229164B (en) * | 2020-11-04 | 2023-11-07 | 中国科学院理化技术研究所 | Multistage heat pump drying parallel system and working method thereof |
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