CN220793586U - Solar energy-heat pump multi-mode dehumidification drying system - Google Patents
Solar energy-heat pump multi-mode dehumidification drying system Download PDFInfo
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- CN220793586U CN220793586U CN202321476282.3U CN202321476282U CN220793586U CN 220793586 U CN220793586 U CN 220793586U CN 202321476282 U CN202321476282 U CN 202321476282U CN 220793586 U CN220793586 U CN 220793586U
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- 238000001035 drying Methods 0.000 title claims abstract description 156
- 238000007791 dehumidification Methods 0.000 title claims abstract description 23
- 238000005338 heat storage Methods 0.000 claims abstract description 126
- 238000011084 recovery Methods 0.000 claims abstract description 68
- 239000002918 waste heat Substances 0.000 claims abstract description 52
- 238000010981 drying operation Methods 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 claims description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000001704 evaporation Methods 0.000 claims description 32
- 230000008020 evaporation Effects 0.000 claims description 18
- 239000011232 storage material Substances 0.000 claims description 18
- 238000009833 condensation Methods 0.000 claims description 16
- 230000005494 condensation Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 22
- 230000001502 supplementing effect Effects 0.000 abstract description 6
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a solar energy-heat pump multi-mode dehumidification drying system, and belongs to the technical field of dehumidification drying. The device comprises a solar heat collection drying device, a heat pump waste heat recovery device and a phase change heat storage box; the heat pump drying device comprises an evaporator (17), a condenser (13), a compressor I (12), a main expansion valve I (23), a supplementary expansion valve I (18), a phase-change heat storage box I (21) and a filter I (24). On one hand, the heat pump drying unit and the heat pump waste heat recovery unit in the device both adopt an intermediate air supplementing technology, and a phase change heat storage box is applied to realize a heat storage and heat release compound working mode of the device; on the other hand, the device combines the solar heat collection drying technology, the heat pump drying technology and the heat pump waste heat recovery technology, integrates the four common technologies of heat collection, heat accumulation, heat release and waste heat recovery, effectively improves the integral drying efficiency of the heat pump drying unit and the heat pump waste heat recovery unit, and effectively solves the problem of discontinuous and stable solar single drying operation.
Description
Technical Field
The utility model relates to the technical field of dehumidification drying, in particular to a solar energy-heat pump multi-mode dehumidification drying system.
Background
Solar energy is a pollution-free and sustainable energy source, and is widely applied to various fields in recent years through a series of technologies.
The use of solar drying is a new way of exploiting solar energy, however existing single solar drying devices are susceptible to solar light intensity, the drying devices cannot operate continuously, and there is a series of instability. In addition, the corresponding technology of the heat pump drying device applied in the current stage has the defect of high power consumption in the drying operation, and the high-temperature hot and humid air dried by the device cannot be effectively recycled and directly discharged out of the drying chamber, so that the drying efficiency of the heat pump drying device is not further improved, and the energy-saving efficiency is lower.
Disclosure of Invention
The utility model aims to provide a solar-heat pump multi-mode dehumidification drying system (drying device) aiming at the defects in the prior drying operation technology. The utility model combines the solar heat collection drying technology, the heat pump drying technology and the heat pump waste heat recovery technology, integrates the four common technologies of heat collection, heat accumulation, heat release and waste heat recovery, effectively improves the overall efficiency of the heat pump drying unit and the heat pump waste heat recovery unit, and effectively solves the problem of discontinuous and stable solar single drying operation.
The aim of the utility model can be achieved by the following technical measures:
the solar energy-heat pump multi-mode dehumidification drying system comprises a solar energy heat collection drying device, a heat pump waste heat recovery device and a phase change heat storage box; the heat pump drying device comprises an evaporator, a condenser, a compressor I, a main expansion valve I, a compensation expansion valve I, a phase-change heat storage box I and a filter I; the inlet of the evaporator is connected with the outlet of the condensation coil I in the phase-change heat storage box I through a corresponding pipeline and a filter I arranged between the pipelines, and the outlet of the evaporator is connected with the four-way reversing valve through a pipeline and a corresponding valve; the outlet of the evaporation coil I in the phase-change heat storage box I is connected with a four-way reversing valve, the outlet of the four-way reversing valve is connected with a compressor I, the outlet of the compressor I is connected with a condenser arranged at the lower part of the drying chamber, the outlet of the condenser is connected with a three-way reversing valve through a pipeline, one path of the three-way reversing valve is connected with the expansion valve I through a pipeline, and the other path of the three-way reversing valve is respectively connected with inlets of the condensation coil I and the evaporation coil I in the phase-change heat storage box I through a main path expansion valve I and corresponding pipelines; the solar heat collection drying device comprises a solar heat collector and a plate heat exchanger which are connected through water inlet and return pipelines, wherein a hot water outlet pipe orifice of the solar heat collector is connected with a heat source water inlet pipe orifice of the plate heat exchanger through a temperature sensor, an electromagnetic control valve I, a water pump, a heat storage water tank and an electromagnetic control valve II which are arranged among the pipelines, and a water inlet pipe orifice of the solar heat collector is connected with a heat source water outlet pipe orifice of the plate heat exchanger through an electromagnetic control valve III which is arranged among the pipelines; the heat exchange refrigerant outflow pipe orifice of the plate heat exchanger is connected with an inlet of a compressor I in the heat pump drying device through a pipeline and a four-way reversing valve, and the heat exchange refrigerant reflux pipe orifice of the plate heat exchanger is connected with a drainage pipe orifice of a condenser in the heat pump drying device through a pipeline, an expansion valve I and a three-way reversing valve; the heat pump waste heat recovery device comprises a heat recovery condenser arranged at the lower part of the drying chamber and a dehumidification evaporator arranged at the upper part of the drying chamber, wherein an outlet of the dehumidification evaporator is respectively connected with an inlet of a compressor II through a valve and a corresponding pipeline, and an outlet of the compressor II is connected with an inlet of the heat recovery condenser; the outlet of the heat recovery condenser is connected with a corresponding pipe orifice of the phase change heat storage box II through a pipeline, a main expansion valve II and a compensation expansion valve II, the outlet of a condensing coil II in the phase change heat storage box II is connected with the inlet of the dehumidifying evaporator through a pipeline and a filter II arranged between the pipelines, and the outlet of an evaporating coil II in the phase change heat storage box II is connected with the inlet of the compressor II through a pipeline.
Furthermore, the heat pump drying unit and the heat pump waste heat recovery unit in the utility model both adopt an intermediate air supplementing technology, and phase change heat storage boxes are arranged between the evaporator and the condenser and between the dehumidifying evaporator and the heat recovery condenser.
According to the utility model, the phase-change heat storage box is used as an intermediate economizer of a heat pump drying unit and a heat pump waste heat recovery unit, a condensing coil and an evaporating coil are arranged in the intermediate economizer, the refrigerant is divided into two paths for circulation, the condensing coil is used as a main circulation pipeline, the main refrigerant is further cooled by condensation, heat is released to heat the phase-change heat storage material in the phase-change heat storage box, the evaporating coil is used as a compensation circulation pipeline, the compensation circulation refrigerant absorbs the heat stored in the phase-change heat storage material by evaporation and absorbs the heat stored in the phase-change heat storage material, and the two paths of the refrigerant realize heat exchange by the action of the phase-change heat storage box, so that the working mode of heat storage and heat release of the phase-change heat storage box is realized.
The phase-change heat storage box I further reduces the temperature of the main path refrigerant in the heat pump drying device through heat exchange, so that the temperature of the refrigerant which enters the inlet of the evaporator after being filtered by the filter I is reduced, and the heat exchange quantity between the evaporator and the outside is improved.
The phase-change heat storage box I further reduces the temperature of the main path refrigerant in the heat pump drying device through heat exchange, so that the temperature of the refrigerant flowing into the inlet of the compressor I through the pipeline is also reduced, and the power consumption of the compressor I is reduced.
The solar heat collector is connected with the heat storage water tank, the heat storage water tank transmits heat to the plate heat exchanger through a pipeline, and the heat collected by the solar heat collector is transmitted into the drying chamber through the heat exchange effect of the plate heat exchanger.
The solar heat collection drying device is connected with the heat pump drying device in parallel through a pipeline, and different working modes can be realized through an electromagnetic control valve I, an electromagnetic control valve II, an electromagnetic control valve III, an electromagnetic control valve IV, an electromagnetic control valve V and an electromagnetic control valve VI in the regulating device, wherein the working modes are as follows: (1) a solar heat collection drying mode; (2) a heat pump drying mode; (3) a solar heat collection drying+heat pump drying mode; (4) a heat pump waste heat recovery mode; (5) a phase change heat storage box heat storage and release mode; (6) The solar heat collection drying, heat pump drying and heat pump waste heat recovery mode is adopted, so that the continuous and efficient requirements of the drying operation are met.
The matched fan I of the evaporator can accelerate the heat exchange between the outside air and the refrigerant; the matched fan II of the condenser can enable the heat emitted by the condenser to flow into the drying chamber rapidly; the hot and humid air dried in the drying chamber can be quickly recovered into the dehumidifying evaporator by the fan III matched with the dehumidifying evaporator; the matched fan IV of the heat recovery condenser can enable the recovered heat to flow into the drying chamber quickly.
The phase-change heat storage box II further reduces the heat temperature of the main path refrigerant in the heat pump waste heat recovery device through heat exchange, so that the temperature of the refrigerant entering the inlet of the dehumidification evaporator after being filtered by the filter II is reduced, the temperature difference of the refrigerant at the inlet and the outlet of the dehumidification evaporator is larger, and the waste heat recovery efficiency of the heat pump waste heat recovery device is improved.
The phase-change heat storage box II further reduces the temperature of the main path refrigerant in the heat pump waste heat recovery device through heat exchange, so that the temperature of the refrigerant flowing into the inlet of the compressor II through the pipeline is also reduced, and the power consumption of the compressor II is reduced.
The beneficial effects of the utility model are as follows:
the device combines the solar heat collection drying technology, the heat pump drying technology and the heat pump waste heat recovery technology, integrates four common technologies of heat collection, heat storage, heat release and waste heat recovery, effectively improves the overall efficiency of the heat pump drying unit and the heat pump waste heat recovery unit, and effectively solves the problem of discontinuous and stable solar single drying operation.
Further, the heat pump drying unit and the heat pump waste heat recovery unit of the device both adopt an intermediate air supplementing technology, the refrigerant in the device is divided into a main path and a supplementing path for circulation through the action of the phase change heat storage box, the main path refrigerant and the supplementing path refrigerant respectively flow through the condensing coil and the evaporating coil in the phase change heat storage box, the phase change heat storage box is used as an intermediate economizer, the heat exchange of the two paths of refrigerant is realized, the temperature of the refrigerant flowing into the inlet of the evaporator and the inlet of the dehumidifying evaporator is reduced, and the heating capacity of the heat pump drying device and the waste heat recovery efficiency of the heat pump waste heat recovery device are effectively improved; and the temperature of the refrigerant flowing into the inlet of the compressor is reduced, so that the overall power consumption of the device is reduced.
Drawings
Fig. 1 is a schematic diagram of a solar heat collection drying mode path according to the present utility model.
Fig. 2 is a schematic diagram of a heat pump drying mode path of the present utility model.
Fig. 3 is a schematic diagram of a solar heat collection drying+heat pump drying mode path according to the present utility model.
Fig. 4 is a schematic diagram of a heat pump waste heat recovery mode path of the present utility model.
Fig. 5 is a schematic diagram of a heat accumulation and release mode path of the phase change heat accumulation tank of the utility model.
Fig. 6 is a schematic diagram of a path of the solar heat collection drying, heat pump drying and heat pump waste heat recovery mode of the utility model.
Fig. 7 is an enlarged view of the phase change heat storage tank 1 of the present utility model.
Fig. 8 is an enlarged view of the phase change heat storage tank ii of the present utility model.
The reference numerals are explained as follows:
1. the solar heat collector, 2, a temperature sensor, 3, an electromagnetic control valve I, 4, a water pump, 5, a heat storage water tank, 6, an electromagnetic control valve II, 7, an electromagnetic control valve III, 8, a plate heat exchanger, 9, an electromagnetic control valve IV, 10, an electromagnetic control valve V, 11, a four-way reversing valve, 12, a compressor I, 13, a condenser, 14, a fan II, 15, a three-way reversing valve, 16, a fan I, 17, an evaporator, 18, a make-up expansion valve I, 19, a condensing coil I, 20, an evaporating coil I, 21, a phase change heat storage tank I, 22, a phase change heat storage material I, 23, a main expansion valve I, 24, a filter I, 25, an expansion valve I, 26, a material frame, 27, a drying chamber 28, a fan III, 29, a dehumidification evaporator, 30, a compressor II, 31, a heat recovery condenser 32, a fan IV, 33, a main expansion valve II, 34, a make-up expansion valve II, 35, a condensing coil II, 36, an evaporating coil II, 37, a heat storage tank II, 38, a phase change storage tank II, 39, a phase change storage material, 40, an electromagnetic control valve II.
Detailed Description
The utility model will be further described with reference to examples (figures).
As shown in fig. 1, the solar-heat pump multi-mode dehumidification drying system comprises a solar heat collection drying device, a heat pump waste heat recovery device and a phase change heat storage box; the heat pump drying device comprises an evaporator 17, a condenser 13, a compressor I12, a main expansion valve I23, a supplementary expansion valve I18, a phase-change heat storage box I21 and a filter I24; the inlet of the evaporator 17 is communicated with a corresponding pipeline, a filter I24 arranged between the pipelines is connected with the outlet of a condensation coil I19 in the phase-change heat storage box I, and the outlet of the evaporator 17 is connected with the four-way reversing valve 11 through the pipeline and a corresponding valve; the outlet of an evaporation coil I20 in the phase-change heat storage box I21 is connected to a four-way reversing valve 11, the outlet of the four-way reversing valve 11 is connected to a compressor I12, the outlet of the compressor I12 is connected to a condenser 13 arranged at the lower part of the drying chamber, the outlet of the condenser is connected to a three-way reversing valve 15 through a pipeline, one path of the three-way reversing valve is connected to an expansion valve I25 through a pipeline, and the other path of the three-way reversing valve is connected to inlets of a condensation coil I19 and an evaporation coil I20 in the phase-change heat storage box I21 through a main expansion valve I23 and corresponding pipelines respectively; the solar heat collection drying device comprises a solar heat collector 1 and a plate heat exchanger 8 which are connected through water inlet and return pipelines, wherein a hot water outlet pipe orifice of the solar heat collector 1 is connected with a heat source water inlet pipe orifice of the plate heat exchanger 8 through a temperature sensor 2, an electromagnetic control valve I3, a water pump 4, a heat storage water tank 5 and an electromagnetic control valve II 6 which are arranged among the pipelines, and a water inlet pipe orifice of the solar heat collector is connected with a heat source water outlet pipe orifice of the plate heat exchanger 8 through an electromagnetic control valve III 7 which is arranged among the pipelines; the heat exchange refrigerant outflow pipe orifice of the plate heat exchanger 8 is connected with the inlet of a compressor I12 in the heat pump drying device through a pipeline and a four-way reversing valve 11, and the heat exchange refrigerant return pipe orifice of the plate heat exchanger 8 is connected with the drain pipe orifice of a condenser 13 in the heat pump drying device through a pipeline, an expansion valve I25 and a three-way reversing valve 15; the heat pump waste heat recovery device comprises a heat recovery condenser 31 arranged at the lower part of the drying chamber and a dehumidification evaporator 29 arranged at the upper part of the drying chamber, wherein the outlet of the dehumidification evaporator 29 is respectively connected with the inlet of a compressor II 30 through a valve and a corresponding pipeline, and the outlet of the compressor II 30 is connected with the inlet of the heat recovery condenser 31; the outlet of the heat recovery condenser 31 is connected to the corresponding pipe orifice of the phase change heat storage box II 37 through a pipeline, the main expansion valve II 33 and the compensation expansion valve II 34, the outlet of the condensing coil II 35 in the phase change heat storage box II 37 is connected to the inlet of the dehumidifying evaporator 29 through a pipeline and a filter II 39 arranged between the pipelines, and the outlet of the evaporating coil II 36 in the phase change heat storage box II 37 is connected to the inlet of the compressor II 30 through a pipeline.
Furthermore, in the utility model, the heat pump drying unit and the heat pump waste heat recovery unit both adopt an intermediate air supplementing technology, and a phase change heat storage box is arranged between the evaporator 17 and the condenser 13 and between the dehumidifying evaporator 29 and the heat recovery condenser 31.
According to the utility model, the phase-change heat storage boxes I and II (see figures 7 and 8) are used as the middle economizers of the heat pump drying unit and the heat pump waste heat recovery unit, the condensing coil and the evaporating coil are arranged in the middle economizers, the refrigerant is divided into two paths for circulation, the condensing coil is used as a main circulation pipeline, the main refrigerant is further cooled through condensation, the heat is released to heat the phase-change heat storage materials in the phase-change heat storage boxes, the evaporating coil is used as a compensation circulation pipeline, the compensation circulation refrigerant absorbs the heat stored in the phase-change heat storage materials through evaporation and heat absorption, and the two paths of refrigerants realize heat exchange through the action of the phase-change heat storage boxes, so that the working mode of heat storage and heat release of the phase-change heat storage boxes is realized.
The phase-change heat storage box I21 further reduces the temperature of the main path refrigerant in the heat pump drying device through heat exchange, so that the temperature of the refrigerant which enters the inlet of the evaporator 17 after being filtered by the filter I24 is reduced, and the heat exchange capacity between the evaporator 17 and the outside is improved.
The phase-change heat storage box I21 further reduces the temperature of the main path refrigerant in the heat pump drying device through heat exchange, so that the temperature of the refrigerant flowing into the inlet of the compressor I12 through the pipeline is reduced, and the power consumption of the compressor I12 is reduced.
The solar heat collector 1 is connected with the heat storage water tank 5, the heat storage water tank 5 transmits heat to the plate heat exchanger 8 through a pipeline, and the heat collected by the solar heat collector 1 is transmitted into the drying chamber 27 through the heat exchange effect of the plate heat exchanger 8.
The solar heat collection drying device is connected with the heat pump drying device in parallel through a pipeline, and different working modes can be realized through an electromagnetic control valve I3, an electromagnetic control valve II 6, an electromagnetic control valve III 7, an electromagnetic control valve IV 9, an electromagnetic control valve V10 and an electromagnetic control valve VI 40 in the regulating device, wherein the working modes are as follows: (1) a solar heat collection drying mode; (2) a heat pump drying mode; (3) a solar heat collection drying+heat pump drying mode; (4) a heat pump waste heat recovery mode; (5) a phase change heat storage box heat storage and release mode; (6) The solar heat collection drying, heat pump drying and heat pump waste heat recovery mode is adopted, so that the continuous and efficient requirements of the drying operation are met.
The matched fan I16 of the evaporator 17 can accelerate the heat exchange between the outside air and the refrigerant; the matched fan II 14 of the condenser 13 can enable the heat emitted by the condenser 13 to flow into the drying chamber 27 quickly; the matched fan III 28 of the dehumidifying evaporator 29 can quickly recycle the hot and humid air dried in the drying chamber 27 into the dehumidifying evaporator 29; the associated fan IV 32 of the heat recovery condenser 31 allows the recovered heat to flow rapidly into the drying chamber 27.
The phase-change heat storage box II 37 further reduces the heat temperature of the main-path refrigerant in the heat pump waste heat recovery device through heat exchange, so that the temperature of the refrigerant entering the inlet of the dehumidification evaporator 29 after being filtered by the filter II 39 is reduced, the temperature difference of the refrigerant at the inlet and the outlet of the dehumidification evaporator 29 becomes larger, and the waste heat recovery efficiency of the heat pump waste heat recovery device is improved.
The phase-change heat storage box II 37 further reduces the temperature of the main-path refrigerant in the heat pump waste heat recovery device through heat exchange, so that the temperature of the refrigerant flowing into the inlet of the compressor II 30 through the pipeline is also reduced, and the power consumption of the compressor II is reduced.
The device combines the solar heat collection drying technology, the heat pump drying technology and the heat pump waste heat recovery technology, and can realize different working modes by regulating and controlling the electromagnetic control valve arranged on the pipeline, wherein the working modes are as follows: (1) a solar heat collection drying mode; (2) a heat pump drying mode; (3) a solar heat collection drying+heat pump drying mode; (4) a heat pump waste heat recovery mode; (5) a phase change heat storage box heat storage and release mode; (6) The solar heat collection drying, heat pump drying and heat pump waste heat recovery mode is adopted, so that the continuous and efficient requirements of the drying operation are met.
(1) Solar heat collection drying mode
This mode of operation may be used when the sun is shining in the summer. The solar heat collector can reasonably set an installation angle according to local longitude and latitude, so that solar light energy is absorbed to the greatest extent. As shown in the path of fig. 1, the specific drying principle is as follows: and opening the electromagnetic control valve I, the water pump, the electromagnetic control valve II, the electromagnetic control valve III, the electromagnetic control valve IV and the fan II, and starting the solar heat collection drying device. At this moment, hot water in the solar heat collector flows into the heat storage water tank through a pipeline, then flows into the plate heat exchanger for heat exchange through regulating and controlling the electromagnetic control valve II according to the requirement of drying materials in the drying chamber, the heat-exchanged hot water in the heat storage water tank flows into the plate heat exchanger, low-temperature water flows back into the solar heat collector through the electromagnetic control valve III, the refrigerant flows into the compressor I12 through the electromagnetic control valve IV and the four-way reversing valve to be compressed into high-temperature high-pressure steam, then flows into the condenser to be condensed and released, the fan II enables the heat to quickly enter the drying chamber, the condensed refrigerant flows into the expansion valve I through the three-way reversing valve to be cooled and depressurized, and then flows back into the plate heat exchanger in a low-temperature low-pressure liquid form, and the whole circulation process is completed.
(2) Heat pump drying mode
This mode of operation may be used when the solar thermal-arrest drying apparatus is not able to provide the heat required for drying in winter. As shown in the path of fig. 2, the specific drying principle is as follows: and opening the electromagnetic control valve V, the fan I and the fan II, and starting the heat pump drying device. At the moment, the refrigerant in the evaporator absorbs heat in external fresh air through heat exchange, the refrigerant after heat exchange flows into the compressor I12 through the electromagnetic control valve V and the four-way reversing valve to be compressed into high-temperature and high-pressure steam, then flows into the condenser to be condensed and released heat, the fan II enables the heat to enter the drying chamber more quickly, the condensed refrigerant flows into the phase-change heat storage box I for circulation through two paths after being cooled and depressurized through the main path expansion valve I, the main path refrigerant flows through the condensing coil I in the phase-change heat storage box I to be re-condensed, the heat is further released to heat the phase-change heat storage material I in the phase-change heat storage box I, and then the phase-change heat storage material I flows back into the evaporator after being filtered through the filter I; the refrigerant in the compensation path flows through an evaporation coil I in a phase-change heat storage box I to absorb heat by evaporation, absorbs heat stored in a phase-change heat storage material I, then flows into a gas compensation port of a compressor I12 through a four-way reversing valve, and finally the two paths of refrigerant are mixed at an inlet of the compressor I12 and then subjected to the next circulation process.
(3) Solar heat collection drying and heat pump drying mode
This mode of operation may be used when there is insufficient sun illumination in the spring and autumn. As shown in the path of fig. 3, the specific drying principle is as follows: and opening the electromagnetic control valve I, the water pump, the electromagnetic control valve II, the electromagnetic control valve III, the electromagnetic control valve IV, the electromagnetic control valve V, the fan I and the fan II, and starting the solar heat collection drying device and the heat pump drying device. At the moment, hot water in the solar heat collector flows into the heat storage water tank through a pipeline, then flows into the plate heat exchanger through the electromagnetic control valve II to exchange heat, and the low temperature water after heat exchange flows back into the solar heat collector through the electromagnetic control valve III; at the same time, the evaporator in the heat pump drying device starts to absorb heat in the external fresh air through the fan I to heat the refrigerant. The two paths of refrigerants are finally mixed at the inlet of the compressor I12 after passing through the electromagnetic control valve IV, the electromagnetic control valve 5 and the four-way reversing valve, flow into the compressor I together to be compressed into high-temperature and high-pressure refrigerant steam, then flow into the condenser together to be condensed and released, the fan II enables heat to enter the drying chamber more quickly, the condensed refrigerant is divided into two paths after passing through the three-way reversing valve, one path of refrigerant flows back into the heat pump drying device, and the other path of refrigerant flows back into the solar heat collection drying device. The refrigerant flowing back into the heat pump drying device flows into the phase-change heat storage box I in two ways after being cooled and depressurized through the main way expansion valve I, the main way refrigerant flows through the condensing coil I in the phase-change heat storage box I for re-condensation, and then flows back into the evaporator after being filtered by the filter I; the refrigerant in the compensation path flows through an evaporation coil I in a phase-change heat storage box I to absorb heat by evaporation, then flows into a gas compensation port of a compressor I through a four-way reversing valve, and is mixed with the refrigerant in the main path to perform the next circulation process; and the refrigerant flowing back into the solar heat collection drying device is throttled, cooled and depressurized by the expansion valve I, flows back into the plate heat exchanger in the form of low-temperature low-pressure liquid refrigerant, and then carries out the next circulation process.
(4) Heat pump waste heat recovery mode
The mode can effectively recycle the waste heat in the hot and humid air exhausted from the drying chamber. As shown in the path of fig. 4, the specific working principle is as follows: and opening the electromagnetic valve VI, the blower III and the blower IV, and starting the heat pump waste heat recovery device. The refrigerant in the dehumidifying evaporator absorbs the heat of hot and humid air discharged by the drying chamber through heat exchange, flows into the compressor II 30 through the electromagnetic control valve VI to be compressed into high-temperature and high-pressure steam, flows into the heat recovery condenser to conduct condensation heat release, the fan IV enables the recovered heat to enter the drying chamber more quickly, the condensed refrigerant flows into the phase change heat storage box II for circulation through two paths after being cooled and depressurized through the main path expansion valve II, the main path refrigerant flows through the condensing coil II in the phase change heat storage box II for re-condensation, the released heat heats the phase change heat storage material II in the phase change heat storage box II, and then flows back into the evaporator after being filtered through the filter II; the refrigerant in the compensation path flows through an evaporation coil II in a phase-change heat storage box II to absorb heat by evaporation, absorbs heat in a phase-change heat storage material II, flows into a gas compensation port of a compressor II 30, and is mixed with the refrigerant in the main path to perform the next circulation process.
(5) Phase change heat storage box heat storage and heat release mode
In this example, the phase change heat storage boxes in the heat pump drying device and the heat pump waste heat recovery device have the functions of heat storage and heat release. As shown in the path of fig. 5, the specific working principle is as follows: opening the electromagnetic control valve V and the electromagnetic control valve VI, and starting the heat pump drying device and the heat pump waste heat recovery device. After the refrigerant in the heat pump drying device is condensed and released in the condenser, the refrigerant is cooled and depressurized through the main-path expansion valve I and flows into the phase-change heat storage box I for circulation in two paths, the main-path refrigerant flows through the condensing coil I in the phase-change heat storage box I for re-condensation, the heat is further released to heat the phase-change heat storage material I in the phase-change heat storage box I, a heat storage mode is realized, the supplementing-path refrigerant flows through the evaporating coil I in the phase-change heat storage box I for evaporation and heat absorption, and the heat stored in the phase-change heat storage material I is absorbed, so that the heat release mode is realized. After the heat recovery condenser condenses and releases heat, the refrigerant in the heat pump waste heat recovery device flows into the phase-change heat storage box II for circulation in two ways after being cooled and depressurized by the main way expansion valve II, the main way refrigerant flows through the condensing coil II in the phase-change heat storage box II for re-condensation, the heat is further released to heat the phase-change heat storage material II in the phase-change heat storage box II, a heat storage mode is realized, the supplementary way refrigerant flows through the evaporating coil II in the phase-change heat storage box II for evaporation and heat absorption, and the heat stored in the phase-change heat storage material II is absorbed, so that the heat release mode is realized.
(6) Solar heat collection drying, heat pump drying and heat pump waste heat recovery mode
The mode is the device optimal operation mode. As shown in the path of fig. 6, the specific working principle is as follows: and opening the electromagnetic control valve I, the water pump, the electromagnetic control valve II, the electromagnetic control valve III, the electromagnetic control valve IV, the electromagnetic control valve V, the electromagnetic control valve VI, the blower I, the blower II, the blower III and the blower IV, and starting the solar heat collection drying device, the heat pump drying device and the heat pump waste heat recovery device. Hot water in the solar heat collector flows into the heat storage water tank through a pipeline, then flows into the plate heat exchanger through the electromagnetic control valve II to exchange heat with the refrigerant, the low temperature water after heat exchange flows back into the solar heat collector through the electromagnetic control valve III, and the refrigerant flows into the compressor I12 through the pipeline; meanwhile, an evaporator in the heat pump drying device absorbs heat in external fresh air through the heat exchange effect, the refrigerant after absorbing the heat also flows into the compressor I through a pipeline, the two paths of refrigerant are compressed into high-temperature and high-pressure steam together and then flow into the condenser to conduct condensation heat release, the fan II enables the heat to enter the drying chamber more quickly, the condensed refrigerant is divided into two paths after passing through the three-way reversing valve, one path of refrigerant flows back into the heat pump drying device, and the other path of refrigerant flows back into the plate heat exchanger of the solar heat collection drying device. The refrigerant flowing back into the heat pump drying device is divided into two paths in the phase-change heat storage box I for circulation, the main path of refrigerant flows back into the evaporator, the supplementary path of refrigerant flows back to the supplementary port of the compressor I, and then the two paths of refrigerant are mixed at the inlet of the compressor I and then the next circulation process is carried out. The hot and humid air after drying the materials is blown into a dehumidifying evaporator by a fan III to exchange heat with the refrigerant, the refrigerant after heat exchange flows into a compressor II 30 through an electromagnetic control valve VI to be compressed into high-temperature and high-pressure steam, then flows into a heat recovery condenser to conduct condensation heat release, the fan IV enables the recovered heat to enter the drying chamber more quickly, the condensed refrigerant firstly flows into a phase change heat storage box II for circulation after being cooled and depressurized by a main expansion valve II, and the main refrigerant flows through a condensing coil II in the phase change heat storage box II and then flows back into the dehumidifying evaporator; the refrigerant in the compensation path flows through an evaporation coil II in a phase-change heat storage box II and then flows back to the air compensation port of the compressor II, and finally the two paths of refrigerant are mixed at the inlet of the compressor II and then subjected to the next circulation process.
Claims (3)
1. A solar energy-heat pump multimode dehumidification drying system is characterized in that: the drying system comprises a solar heat collection drying device, a heat pump waste heat recovery device and a phase change heat storage box; the heat pump drying device comprises an evaporator (17), a condenser (13), a compressor I (12), a main expansion valve I (23), a compensation expansion valve I (18), a phase-change heat storage box I (21) and a filter I (24); the inlet of the evaporator (17) is connected with the outlet of the condensation coil I (19) in the phase-change heat storage box I through a corresponding pipeline and a filter I (24) arranged between the pipelines, and the outlet of the evaporator (17) is connected with the four-way reversing valve (11) through a pipeline and a corresponding valve; the outlet of an evaporation coil I (20) in the phase-change heat storage box I (21) is connected with a four-way reversing valve (11), the outlet of the four-way reversing valve (11) is connected with a compressor I (12), the outlet of the compressor I (12) is connected with a condenser (13) arranged at the lower part of the drying chamber, the outlet of the condenser (13) is connected with a three-way reversing valve (15) through a pipeline, one path of the three-way reversing valve (15) is connected with an expansion valve I (25) through a pipeline, and the other path of the three-way reversing valve is connected with inlets of the condensation coil I (19) and the evaporation coil I (20) in the phase-change heat storage box I (21) through a main path expansion valve I (23) and corresponding pipelines respectively; the solar heat collection drying device comprises a solar heat collector (1) and a plate heat exchanger (8) which are connected through water inlet and return pipelines, wherein a hot water outlet pipe orifice of the solar heat collector (1) is connected with a heat source water inlet pipe orifice of the plate heat exchanger (8) through a temperature sensor (2), an electromagnetic control valve I (3), a water pump (4), a heat storage water tank (5) and an electromagnetic control valve II (6) which are arranged between the pipelines, and a water inlet pipe orifice of the solar heat collector (1) is connected with a heat source water outlet pipe orifice of the plate heat exchanger (8) through an electromagnetic control valve III (7) which is arranged between the pipelines; the heat exchange refrigerant outflow pipe orifice of the plate heat exchanger (8) is connected with the inlet of a compressor I (12) in the heat pump drying device through a pipeline and a four-way reversing valve (11), and the heat exchange refrigerant reflux pipe orifice of the plate heat exchanger (8) is connected with the drainage pipe orifice of a condenser (13) in the heat pump drying device through a pipeline, an expansion valve I (25) and a three-way reversing valve (15); the heat pump waste heat recovery device comprises a heat recovery condenser (31) arranged at the lower part of the drying chamber and a dehumidification evaporator (29) arranged at the upper part of the drying chamber, wherein an outlet of the dehumidification evaporator (29) is respectively connected with an inlet of a compressor II (30) through a valve and a corresponding pipeline, and an outlet of the compressor II (30) is connected with an inlet of the heat recovery condenser (31); the outlet of the heat recovery condenser (31) is connected to the corresponding pipe orifice of the phase change heat storage box II (37) through a pipeline, a main expansion valve II (33) and a compensation expansion valve II (34), the outlet of the condensing coil II (35) in the phase change heat storage box II (37) is connected to the inlet of the dehumidifying evaporator (29) through a pipeline and a filter II (39) arranged between the pipelines, and the outlet of the evaporating coil II (36) in the phase change heat storage box II (37) is connected to the inlet of the compressor II (30) through a pipeline.
2. The solar-heat pump multi-mode dehumidification drying system of claim 1, wherein: the phase-change heat storage box I, II is as the middle economizer of heat pump drying device and heat pump waste heat recovery device, internally mounted has condensing coil and evaporating coil, divide into two ways with the refrigerant and circulate, condensing coil is as main way circulation pipeline, further cool down main way refrigerant through condensation, give off heat heating phase-change heat storage material in the phase-change heat storage box, evaporating coil is as the benefit circulation pipeline, benefit way circulation refrigerant is through evaporation endothermic effect, absorb the heat of storage in the phase-change heat storage material, two ways refrigerant have realized heat exchange through the effect of phase-change heat storage box, thereby realized the phase-change heat storage box heat accumulation + exothermic mode of operation.
3. The solar-heat pump multi-mode dehumidification drying system of claim 1, wherein: the solar heat collection drying device is connected with the heat pump drying device in parallel through a pipeline, and different working modes can be realized through an electromagnetic control valve I (3), an electromagnetic control valve II (6), an electromagnetic control valve III (7), an electromagnetic control valve IV (9), an electromagnetic control valve V (10) and an electromagnetic control valve VI (40) in the regulating device, and the working modes are as follows: (1) a solar heat collection drying mode; (2) a heat pump drying mode; (3) a solar heat collection drying+heat pump drying mode; (4) a heat pump waste heat recovery mode; (5) a phase change heat storage box heat storage and release mode; (6) The solar heat collection drying, heat pump drying and heat pump waste heat recovery mode is adopted, so that the continuous and efficient requirements of the drying operation are met.
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