CN210952279U - Hot air drying system using heat pump as heat source and performing heat recovery - Google Patents
Hot air drying system using heat pump as heat source and performing heat recovery Download PDFInfo
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- CN210952279U CN210952279U CN201921662209.9U CN201921662209U CN210952279U CN 210952279 U CN210952279 U CN 210952279U CN 201921662209 U CN201921662209 U CN 201921662209U CN 210952279 U CN210952279 U CN 210952279U
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Abstract
The utility model discloses a hot air drying system which takes a heat pump as a heat source and recovers heat, and on the basis of taking the heat pump as a heat source of the hot air drying system, the heat in the exhaust air of the drying system is recovered; the fresh air inlet, the condenser, the fan II and the material dryer are sequentially connected through a fresh air pipeline; fresh air is heated by a heat pump condenser under the action of a fan II and enters a material dryer; the material dryer is connected with an air inlet of a cyclone dust collector through an air exhaust pipe, an air outlet of the cyclone dust collector is connected with an air inlet of an electrostatic dust collector through an air pipe, an air outlet of the electrostatic dust collector is connected with an air inlet of an air chamber through an air pipe, and a heat pump system finned-free light pipe type heat exchanger is arranged in the air chamber; exhaust air enters the air chamber after two-stage dust removal, exchanges heat with the finned tubular light exchanger and then is discharged, and exhaust air heat recovery is realized. The utility model discloses use multistage dust removal purification to air exhaust, use the heat pump as dry heat source simultaneously, retrieve the heat in airing exhaust, realized energy-conserving high-efficient drying.
Description
Technical Field
The utility model relates to a drying system especially relates to an use heat pump as the heat source and carry out hot air drying system of heat recovery.
Background
Hot air drying is widely used in various fields such as agriculture, engineering, chemistry, medicine and the like, and the working mechanism of the hot air drying is hot air convection, and the hot air drying is characterized in that the hot air is convectively transmitted to the outer layer of the wet material contacted with the hot air in the form of hot air by means of the heat energy generated by a heat source and then is transmitted to the inner layer through the outer layer, and finally the moisture of the material is evaporated.
At present, hot air drying is used for processing materials with high moisture content, such as grains, fermentation residues, moist solid waste and the like, and on the one hand, the drying system has huge energy consumption. On the other hand, because the dust content in the exhaust air is large, the problem of dust blockage is easy to occur when the heat exchanger is directly used for recovering the heat in the exhaust air, and finally, a large amount of high-temperature high-humidity gas with rich heat energy at the outlet of the drying system is directly discharged into the atmospheric environment without heat recovery, so that the energy waste is caused, and the environment is polluted.
With the development and utilization of heat pump technology, heat pumps are applied to drying systems as heat sources, and energy consumption can be reduced. The heat pump can consume a part of high-grade energy through reverse Carnot cycle, absorb heat energy from the surrounding environment, and release the part of heat energy and the heat energy converted from the consumed high-grade energy to the working medium needing to be heated.
Patent CN208532590U shows a drum drying system with a heat pump as the heat source. High-temperature drying air is generated through a heat pump and is conveyed into the barrel body of the roller dryer, and the convection heat transfer and mass transfer of materials and hot air are realized through the rotation of the barrel body, so that the drying is realized. Although the patent uses the heat pump as the heat source of the hot air drying system, the heat in the exhaust air can not be recovered, and the waste of the exhaust air heat is caused.
Patent CN110186272A shows a heat pump drying device. High-temperature dry air is generated by the heat pump to be used by the drying system, and heat in the exhaust air is recovered by the heat recoverer. Although this patent has realized that the heat pump is as drying system heat source and retrieves the heat in airing exhaust, because drying system air exhaust dust content is great, only use the one-level dust removal can not effectively get rid of the tiny granule in airing exhaust, in the long-term use process, tiny granule easily attaches to the heat exchanger surface of heat recovery ware, leads to the thermal resistance increase, and heat recovery ware efficiency reduces, easily appears the ash simultaneously and blocks up.
Therefore, an energy-saving high-efficiency hot air drying device capable of effectively recovering heat in exhaust air is lacked at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an use heat pump to carry out hot air drying system of heat recovery as the heat source, solve the high problem of traditional hot air drying system energy consumption, because of the big, ash stifled problem that causes evaporimeter heat transfer ability low of dust content when having solved current hot air drying system cyclic utilization exhaust simultaneously.
To achieve the above objective, the present invention provides the following technical solutions:
a hot air drying system which takes a heat pump as a heat source and can carry out heat recovery is designed, and comprises a heat pump system, a drying system and a multi-stage dust removal system; on one hand, air enters from the drying system, after the materials to be dried are dried in the drying system, the air is discharged from the outlet of the drying system and then sequentially enters the cyclone dust collector and the electrostatic dust collector in the multi-stage dust collection system for dust collection, the air is discharged from the outlet of the electrostatic dust collector after the electrostatic dust collector finishes the last stage of dust collection to form exhaust air, enters the air chamber and finally is discharged from the air chamber outwards. On the other hand, the refrigerant circulates in the heat pump system, absorbs heat in the external environment in the finned tube heat exchanger, absorbs heat in exhaust air in the finless plain tube heat exchanger, is compressed by the compressor, then exchanges heat with air entering the drying system through the condenser, enters the drying system for material drying after absorbing heat, and flows into the finned tube heat exchanger to absorb heat again after releasing heat, and the refrigerant circulates in a reciprocating manner.
The heat pump system comprises an air chamber, a finned light tube type heat exchanger is arranged in the air chamber, an outlet of the finned light tube type heat exchanger is connected with a compressor, an outlet of the compressor is connected with a condenser, an outlet of the condenser is connected with an expansion valve, an outlet of the expansion valve is connected with a finned tube type heat exchanger, an outlet of the finned tube type heat exchanger is connected with an inlet of the finned light tube type heat exchanger, and the finned light tube type heat exchanger, the compressor, the condenser, the expansion valve and the finned tube type heat exchanger are sequentially connected through refrigerant pipelines to form the closed heat pump system. The refrigerant exchanges heat with air in the environment through the finned tube heat exchanger, the contact area of the heat exchanger and the ambient air is increased, the heat exchange capacity of the heat exchanger and the ambient air is improved, the refrigerant absorbs heat and flows into the finless light tube heat exchanger, the heat exchange is carried out through the finless light tube heat exchanger and the exhaust air, the influence of residual dust in the exhaust air on the heat exchange of the finless light tube heat exchanger can be reduced, the drainage of condensed water is facilitated, and the refrigerant completes vaporization after absorbing heat through the finless light tube heat exchanger and the finned tube heat exchanger and is sucked into the compressor; the compressor compresses a low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, and the high-temperature high-pressure gaseous refrigerant is sent into the condenser, and the refrigerant transfers heat to the fan through the condenser to suck fresh air in the fresh air pipeline; the refrigerant is condensed from a gas state to release heat into a liquid state and flows into the expansion valve, the liquid refrigerant flows into the finned tube heat exchanger again after being throttled and cooled by the expansion valve, the circulation is repeated, and the heat in the ambient air and the exhaust air is continuously sent into fresh air. Compared with the prior art that the exhaust of the high humidity of the whole cyclic utilization of exhausting air can influence the drying effect, the two-stage heat exchanger is adopted in the heat pump system, on one hand, the heat in the exhaust air is absorbed, but the high humidity after the heat is released is exhausted to exhaust the drying system, the drying effect of fresh air in the drying system can not be influenced, on the other hand, the heat in the air is absorbed, the heat absorption efficiency of the heat pump is improved, the stability of the drying system is ensured, and the energy consumption of the drying system to electricity is greatly reduced.
The drying system comprises a fresh air pipeline and a material dryer, one end of the fresh air pipeline is connected with a fresh air inlet, the other end of the fresh air pipeline is connected with an air inlet of the material dryer, a condenser is arranged in one end, close to the fresh air inlet, of the fresh air pipeline, and a fan II is arranged in one end, close to the air inlet of the material dryer, of the fresh air pipeline; fresh air enters the fresh air pipeline from the fresh air inlet under the action of the fan II, exchanges heat with the condenser, and enters the material dryer through the air inlet of the material dryer after absorbing heat.
The multistage dust removal system comprises a cyclone dust collector and an electrostatic dust collector, an air inlet of the cyclone dust collector is connected with an air outlet of a material dryer in the drying system through an air pipe, an air outlet of the cyclone dust collector is connected with an air inlet of the electrostatic dust collector through an air pipe, and an air outlet of the electrostatic dust collector is connected with an air inlet of an air chamber through an air pipe. The air dried in the material dryer is discharged through an air outlet of the material dryer and then enters a cyclone dust collector through an air pipe, primary dust removal is carried out on the cyclone dust collector, the air is discharged from the air outlet of the cyclone dust collector and enters the electrostatic dust collector through the air pipe, exhaust air is discharged from the air outlet of the electrostatic dust collector after secondary dust removal in the electrostatic dust collector, the exhaust air enters an air chamber through the air pipe and exchanges heat with the finned light tube type heat exchanger, and the exhaust air with high temperature and high humidity transfers heat to refrigerant in the finned light tube type heat exchanger and then is discharged from the air chamber.
Furthermore, a hot air drying system which takes a heat pump as a heat source and can carry out heat recovery is designed, and the electrostatic dust collector is a wet electrostatic dust collector; the wet electrostatic dust collector comprises an electrostatic dust collector shell, a corona electrode, a dust collecting electrode and a steam nozzle, wherein one end of the electrostatic dust collector shell is connected with an air inlet of the electrostatic dust collector, and the other end of the electrostatic dust collector shell is connected with an air outlet of the electrostatic dust collector; the corona electrode is arranged in the middle of the housing of the electrostatic dust collector, the dust collecting electrode is arranged in the housing of the electrostatic dust collector along the gas flowing direction, and the steam nozzle is arranged at the top of the electrostatic dust collector. The air inlet of the electrostatic dust collector is connected with the air outlet of the cyclone dust collector through an air pipe, and the air outlet of the electrostatic dust collector is connected with the air inlet of the air chamber through an air pipe. After the exhaust air enters the electrostatic precipitator, ionization is completed under the discharge action of a corona electrode, dust particles obtain electric charges, meanwhile, a small amount of steam is introduced into the exhaust air through a steam nozzle by the electrostatic precipitator, and fine particles in the exhaust air grow and agglomerate into large particles after absorbing water vapor, so that the dust collecting electrode can conveniently collect the water vapor; the water mist with the adsorbed charged dust particles is more easily adsorbed by the dust collecting electrode under the action of the electric field force, enters the dust collecting groove of the electrostatic dust collector, is discharged from the air outlet of the electrostatic dust collector after secondary dust collection is finished by air exhaust, and enters the air chamber.
It only removes dust through cyclone to air exhaust among the prior art to compare, this application introduces the small dust particle in the adsorbed air that wet electrostatic precipitator can be better, and wet electrostatic precipitator steam spout connects the high temperature steam source, lets in a small amount of steam to airing exhaust through the steam spout, and tiny granule adsorbs behind the vapor, grows up and gathers for the large granule, and the utmost point entrapment of collection of being convenient for, and the heat of steam is simultaneously aired exhaust and is taken away, has also carried out the recovery through heat pump system.
Simultaneously wet electrostatic precipitator in this application carries out the flue gas dust removal through a large amount of water sprays and adopts traditional wet electrostatic precipitator to compare with among the prior art thermal power plant, wet electrostatic precipitator in this application has improved, change into vapor by the water spray, at first avoided traditional wet precipitator when the dry dust removal of airing exhaust, can cause the calorific loss problem of airing exhaust when using normal atmospheric temperature water smoke dust removal, secondly because of the humidity content of airing exhaust is great, less vapor can make the humidity of airing exhaust reach the saturation, reach and adsorb tiny granule and condense into the effect of large granule collection dirt, it is lower than traditional wet precipitator to consume energy.
Furthermore, a hot air drying system which takes a heat pump as a heat source and can recover heat is designed, the material dryer is a hot air drying device, for example, any drying device which takes hot air drying as a main drying mode, such as a drum dryer or a vibrated fluidized bed, can be used for the drying system of the application.
Has the advantages that:
according to the above technical scheme, the utility model discloses a technical scheme provides an use the heat pump to carry out hot air drying system of heat recovery as the heat source, compares in prior art and has following beneficial effect: 1) the multistage dust removal system is arranged, and particularly a wet electrostatic dust collector is introduced, so that fine particles are effectively removed, a large amount of dust is prevented from being attached to the finned tubular heat exchanger, and the running stability of the system is improved; 2) the dust content of the exhaust air is reduced, and the environment is protected; 3) the heat pump system is provided with the two-stage evaporation heat exchanger, so that heat can be absorbed from the outdoor environment, heat can be recovered from exhaust air in a direct heat exchange mode, and the energy consumption of the drying system to electricity is further reduced.
It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are mutually inconsistent.
The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments in accordance with the teachings of the present invention.
Drawings
The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of the system of the present invention.
Fig. 2 is a schematic diagram of the system of the present invention when the material dryer is a drum dryer.
Fig. 3 is a schematic diagram of the system of the present invention when the material dryer is a vibrating fluidized bed dryer.
1. An air chamber; 2. a fan I; 3. an air outlet of the air chamber; 4. a finless light pipe heat exchanger; 5. a finned tube heat exchanger; 6. a compressor; 7. an expansion valve; 8. a fresh air inlet; 9. a condenser; 10. a fresh air duct; 11. a fan II; 12. a material dryer; 13. a fan III; 14. an exhaust duct; 15. a cyclone dust collector; 16. an air inlet of the cyclone dust collector; 17. an air outlet of the cyclone dust collector; 18. an air inlet of the electrostatic dust collector; 19. a steam jet; 20. an electrostatic precipitator; 21. an air outlet of the electrostatic dust collector, 22, a steam source, 23, a drum dryer, 24 and a vibrated fluidized bed.
Detailed Description
For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.
In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.
For solving the problem that traditional hot air drying system energy consumption is high, solve simultaneously current hot air drying system and utilize when exhausting because of the dust content is big, the stifled problem that causes evaporimeter heat transfer ability low of ash, this application has designed one kind and has used the heat pump to carry out heat recovery's hot air drying system as the heat source. On one hand, air enters from the inlet of the drying system, after the materials to be dried are dried in the drying system, the air is discharged from the outlet of the drying system and then sequentially enters the cyclone dust collector 15 and the electrostatic dust collector 20 in the multi-stage dust collection system for dust collection, and after the electrostatic dust collector 20 finishes the last stage of dust collection, the air is discharged from the air outlet 21 of the electrostatic dust collector, enters the air chamber 1 and is discharged from the air outlet 3 of the air chamber. On the other hand, the refrigerant circulates in the heat pump system, enters the finless optical tube type heat exchanger 4 after absorbing heat in the external environment in the finned tube type heat exchanger 5, is vaporized after absorbing heat in exhaust air in the finless optical tube type heat exchanger 4, and is sucked into the compressor 6, the compressor 6 compresses low-pressure gaseous refrigerant into high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is sent into the condenser 9, the refrigerant exchanges heat with air entering the drying system through the condenser 9, the air enters the material dryer 12 after absorbing heat to dry materials, the refrigerant is liquefied after releasing heat and flows into the finned tube type heat exchanger 5 to absorb heat again, and the circulation is performed.
In specific implementation, as shown in fig. 1, the hot air drying system which uses a heat pump as a heat source and can perform heat recovery is designed, and comprises a heat pump system, a drying system and a multistage dust removal system; the heat pump system comprises an air chamber 1, a finless light pipe type heat exchanger 4 is arranged in the air chamber 1, an outlet of the finless light pipe type heat exchanger 4 is connected with a compressor 6, an outlet of the compressor 6 is connected with a condenser 9, an outlet of the condenser 9 is connected with an expansion valve 7, an outlet of the expansion valve 7 is connected with a finned tube type heat exchanger 5, an outlet of the finned tube type heat exchanger 5 is connected with an inlet of the finless light pipe type heat exchanger 4, and the finless light pipe type heat exchanger 4, the compressor 6, the condenser 9, the expansion valve 7 and the finned tube type heat exchanger 5 are sequentially connected through refrigerant pipelines.
The refrigerant exchanges heat with air in the environment through the finned tube heat exchanger 5, the finned tube heat exchanger 5 can increase the contact area with the ambient air, the heat exchange capacity of the finned tube heat exchanger 5 and the ambient air is improved, the refrigerant absorbs heat and flows into the finless light tube heat exchanger 4, and the finless light tube heat exchanger 4 exchanges heat with exhaust air formed by being discharged from the electrostatic dust collector 20 in the air chamber 1, so that the influence of residual dust in the exhaust air on the heat exchange of the finless light tube heat exchanger 4 can be reduced, and the drainage of condensed water is facilitated; the refrigerant completes vaporization after absorbing heat and is sucked into the compressor 6; the compressor 6 compresses the low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is sent into the condenser 9, and the refrigerant transfers heat to fresh air sucked into a fresh air pipeline 10 by a fan II 11 through the condenser 9; the refrigerant is condensed from the gas state to release heat into the liquid state and flows into the expansion valve 7, the liquid refrigerant is throttled and cooled by the expansion valve 7 and then flows into the finned tube heat exchanger 5 again, the circulation is repeated, and the heat in the ambient air and the exhaust air is continuously sent to the fresh air.
The drying system comprises a fresh air pipeline 10 and a material dryer 12, one end of the fresh air pipeline 10 is connected with a fresh air inlet 8, the other end of the fresh air pipeline is connected with the material dryer 12, a condenser 9 is arranged in one end, close to the fresh air inlet 8, of the fresh air pipeline 10, and a fan II 11 is arranged in one end, close to the material dryer 12, of the fresh air pipeline 10; the fan II 11 sucks fresh air into a fresh air pipeline 10 from a fresh air inlet 8, the fresh air and the condenser 9 exchange heat to absorb heat and then the fresh air is sent into a material dryer 12, and hot air which is dried enters an exhaust pipeline 14 under the action of a fan III 13.
The multistage dust removal system comprises a cyclone dust collector 15 and an electrostatic dust collector 20, wherein an air inlet 16 of the cyclone dust collector is connected with the material dryer 12 through an exhaust pipeline 14, an air outlet 17 of the cyclone dust collector is connected with an air inlet 18 of the electrostatic dust collector through an air pipe, and an air outlet 21 of the electrostatic dust collector is connected with an air inlet of the air chamber 1 through an air pipe. The air dried in the material dryer 12 enters the cyclone dust collector 15 through the exhaust duct 14, the exhaust air rotates in the cyclone dust collector 15, the dust removal is completed under the action of centrifugal force, dust particles fall into a dust collecting groove of the cyclone dust collector at the bottom of the cyclone dust collector 15, and the air is discharged from an air outlet 17 of the cyclone dust collector after the primary dust removal of the exhaust air and enters the electrostatic dust collector 20. Exhaust air is discharged from an air outlet 21 of the electrostatic dust collector after secondary dust collection in the electrostatic dust collector 20, enters the air chamber 1 through an air pipe, exchanges heat with the finned light tube type heat exchanger 4, transfers heat to a refrigerant through the high-temperature and high-humidity exhaust air, and is discharged from an air outlet 3 of the air chamber through the high-humidity exhaust air under the action of the fan I2.
In specific implementation, the hot air drying system which takes the heat pump as a heat source and can recover heat is designed, and the electrostatic dust collector 20 is a wet electrostatic dust collector; the air inlet 18 of the electrostatic dust collector is connected with the air outlet 17 of the cyclone dust collector through an air pipe, and the air outlet 21 of the electrostatic dust collector is connected with the air inlet of the air chamber 1 through an air pipe. The discharged air enters the electrostatic precipitator 20 and then is ionized at the corona electrode, so that dust particles obtain electric charges, the electric charges are absorbed by the dust collecting electrode and then fall into a dust collecting groove of the electrostatic precipitator, and the discharged air is discharged from an air outlet 21 of the electrostatic precipitator and enters the air chamber 1 after secondary dust collection of the discharged air is finished.
During the concrete implementation, the application introduces the small dust particle in the adsorption air that wet electrostatic precipitator can be better, wet electrostatic precipitator steam spout 19 connects high temperature steam source 22, let in a small amount of steam to airing exhaust through steam spout 19, after the tiny particle in airing exhaust adsorbs vapor, tiny particle grows up and condenses into the large granule, the utmost point entrapment of collection of being convenient for, steam addition simultaneously, can not reduce the enthalpy value of airing exhaust, the heat of steam is also taken away by airing exhaust, retrieve through heat pump system, the heat loss problem of airing exhaust that produces when having avoided traditional wet precipitator to use normal atmospheric temperature water smoke to remove dust.
In specific implementation, as shown in fig. 2 and 3, the present application designs a hot air drying system that uses a heat pump as a heat source to recover heat, the material dryer 12 is a hot air drying device, and the hot air drying device may be any drying device that uses hot air drying as a main drying method, such as a drum dryer 23 or a vibrated fluidized bed 24.
When the method is specifically implemented, the method for drying the materials by using any one of the hot air drying systems capable of performing heat recovery by taking the heat pump as the heat source is mainly based on the principle of reverse Carnot cycle, the heat pump is taken as the heat source, the heat in the environment and the exhaust air is absorbed by the refrigerant, the heat is transferred to the air entering the drying system, the air is heated and then enters the drying system to dry the materials, the air is discharged from the drying system after drying is completed, the exhaust air after multistage dust removal flows into the heat pump system, the heat in the exhaust air is transferred to the refrigerant through heat exchange, and the heat is recycled.
Air in the environment enters a fresh air pipeline 10 from a fresh air inlet 8 under the action of a fan II 11, is heated by a condenser 9 and then enters a material dryer 12, and after the hot air finishes the drying process of the material to be dried in the material dryer 12, the hot air is discharged from the material dryer 12 under the action of a fan III 13 and enters an exhaust pipeline 14; the exhaust air enters the cyclone dust collector 15 through the exhaust duct 14, rotates in the cyclone dust collector 15, completes dust collection under the action of centrifugal force, is discharged from the air outlet 17 of the top cyclone dust collector, and enters the electrostatic dust collector 20; after the exhaust air enters the electrostatic precipitator 20, ionization is completed under the discharge action of the corona electrode, dust particles obtain electric charges, meanwhile, a small amount of steam is introduced into the electrostatic precipitator 20 through the steam nozzle 19, and after the fine particles in the exhaust air adsorb steam, the fine particles grow and are condensed into large particles, so that the dust collecting electrode can conveniently collect the steam; the water mist with the adsorbed charged dust particles enters a dust collecting groove of the electrostatic dust collector after being adsorbed by a dust collecting electrode under the action of an electric field force; after secondary dust removal is finished, the exhaust air is discharged from an air outlet 21 of the electrostatic dust collector and enters the air chamber 1.
The air is discharged from an air outlet 21 of the electrostatic dust collector, enters the air chamber 1 after multi-stage dust collection, exchanges heat with the finned light tube type heat exchanger 4 in the air chamber 1, transfers heat to a refrigerant in the finned light tube type heat exchanger 4, and then is discharged from an air outlet 3 of the air chamber under the action of the fan I2.
Meanwhile, heat pump system is used for heat recovery of heat in the exhaust air; the refrigerant exchanges heat with air in the environment through the finned tube heat exchanger 5, absorbs heat, flows into the finless light tube heat exchanger 4, exchanges heat with exhaust air through the finless light tube heat exchanger 4, and is vaporized after absorbing heat through the finless light tube heat exchanger 4 and the finned tube heat exchanger 5 and is sucked into the compressor 6; the compressor 6 compresses the low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the high-temperature high-pressure gaseous refrigerant is sent into the condenser 9, and the refrigerant transfers heat to the fan II 11 through the condenser 9 and sucks fresh air in the fresh air pipeline 10; the refrigerant is condensed from the gas state to release heat into the liquid state and flows into the expansion valve 7, the liquid refrigerant is throttled and cooled by the expansion valve 7 and then flows into the finned tube heat exchanger 5 again, the circulation is repeated, and the heat in the ambient air and the exhaust air is continuously sent to the fresh air.
When the specific implementation, this application designs one kind and utilizes the above-mentioned hot air drying system who uses the heat pump as the heat source wantonly to carry out heat recovery to carry out the dry method of material, electrostatic precipitator adopts wet electrostatic precipitator, wet electrostatic precipitator steam nozzle 19 connects high temperature steam source 22, let in a small amount of steam through steam nozzle 19 in to airing exhaust, tiny granule in airing exhaust adsorbs behind the vapor, grow up and condense into the large granule, the collection utmost point entrapment of being convenient for collects, the enthalpy value of airing exhaust can not be reduced in the joining of steam simultaneously, the heat of steam is also taken away by airing exhaust, retrieve through heat pump system, the heat loss problem of airing exhaust that produces when having avoided traditional wet precipitator to use normal atmospheric temperature water smoke to remove dust has been avoided.
In specific implementation, the method for drying the materials by using the hot air drying system which takes the heat pump as a heat source and can recover heat is designed, the evaporation temperature of the finned tubular heat exchanger 4 is set to be lower than the dew point temperature of the exhausted air, the condensation heat in the exhausted air can be absorbed to the maximum extent, the recovery rate of the heat in the exhausted air is improved, and the energy consumption of the drying system is reduced.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.
Claims (4)
1. A hot air drying system using a heat pump as a heat source and performing heat recovery is characterized in that: comprises a heat pump system, a drying system and a multi-stage dust removal system;
the heat pump system comprises an air chamber, a finless light pipe type heat exchanger is arranged in the air chamber, the outlet of the finless light pipe type heat exchanger is connected with a compressor, the outlet of the compressor is connected with a condenser, the outlet of the condenser is connected with an expansion valve, the outlet of the expansion valve is connected with a finned tube type heat exchanger, the outlet of the finned tube type heat exchanger is connected with the inlet of the finless light pipe type heat exchanger, and the finless light pipe type heat exchanger, the compressor, the condenser, the expansion valve and the finned tube type heat exchanger are;
the drying system comprises a fresh air pipeline and a material dryer, wherein one end of the fresh air pipeline is connected with a fresh air inlet, the other end of the fresh air pipeline is connected with an air inlet of the material dryer, the condenser is arranged in one end, close to the fresh air inlet, of the fresh air pipeline, and a fan II is arranged in one end, close to the air inlet of the material dryer, of the fresh air pipeline;
the multistage dust removal system comprises a cyclone dust collector and an electrostatic dust collector, an air inlet of the cyclone dust collector is connected with an air outlet of the material dryer, an air outlet of the cyclone dust collector is connected with an air inlet of the electrostatic dust collector, an air outlet of the electrostatic dust collector is connected with an air inlet of the air chamber, and the material dryer, the cyclone dust collector, the electrostatic dust collector and the air chamber are connected through air pipes.
2. The hot air drying system using a heat pump as a heat source and performing heat recovery according to claim 1, characterized in that: the electrostatic dust collector is a wet electrostatic dust collector, the wet electrostatic dust collector comprises an electrostatic dust collector shell, a corona electrode, a dust collecting electrode and a steam nozzle, one end of the electrostatic dust collector shell is connected with an air inlet of the electrostatic dust collector, and the other end of the electrostatic dust collector shell is connected with an air outlet of the electrostatic dust collector; the corona electrode is arranged in the middle of the housing of the electrostatic dust collector, the dust collecting electrode is arranged in the housing of the electrostatic dust collector along the gas flowing direction, and the steam nozzle is arranged at the top of the electrostatic dust collector.
3. The hot air drying system using a heat pump as a heat source and performing heat recovery according to claim 2, characterized in that: the material dryer is a hot air drying device.
4. The hot air drying system using a heat pump as a heat source and performing heat recovery according to claim 3, characterized in that: the hot air drying device is a roller dryer or a vibrated fluidized bed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921662209.9U CN210952279U (en) | 2019-09-30 | 2019-09-30 | Hot air drying system using heat pump as heat source and performing heat recovery |
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| CN201921662209.9U CN210952279U (en) | 2019-09-30 | 2019-09-30 | Hot air drying system using heat pump as heat source and performing heat recovery |
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| CN210952279U true CN210952279U (en) | 2020-07-07 |
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| CN201921662209.9U Withdrawn - After Issue CN210952279U (en) | 2019-09-30 | 2019-09-30 | Hot air drying system using heat pump as heat source and performing heat recovery |
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| CN (1) | CN210952279U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686502A (en) * | 2019-09-30 | 2020-01-14 | 江苏大学 | Hot air drying system and method for heat recovery by using heat pump as heat source |
| CN116428831A (en) * | 2023-06-15 | 2023-07-14 | 山东省寿光蔬菜产业集团有限公司 | Drying and dewatering equipment for straw processing |
-
2019
- 2019-09-30 CN CN201921662209.9U patent/CN210952279U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686502A (en) * | 2019-09-30 | 2020-01-14 | 江苏大学 | Hot air drying system and method for heat recovery by using heat pump as heat source |
| CN110686502B (en) * | 2019-09-30 | 2023-06-09 | 江苏大学 | Hot air drying system and method for heat recovery by taking heat pump as heat source |
| CN116428831A (en) * | 2023-06-15 | 2023-07-14 | 山东省寿光蔬菜产业集团有限公司 | Drying and dewatering equipment for straw processing |
| CN116428831B (en) * | 2023-06-15 | 2023-11-21 | 山东省寿光蔬菜产业集团有限公司 | Drying and dewatering equipment for straw processing |
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