CN112432492B - Based on lithium bromide low temperature medicinal material drying device - Google Patents
Based on lithium bromide low temperature medicinal material drying device Download PDFInfo
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- CN112432492B CN112432492B CN202110108009.4A CN202110108009A CN112432492B CN 112432492 B CN112432492 B CN 112432492B CN 202110108009 A CN202110108009 A CN 202110108009A CN 112432492 B CN112432492 B CN 112432492B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
- F26B23/005—Heating arrangements using waste heat recovered from dryer exhaust gases using a closed cycle heat pump system ; using a heat pipe system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/027—Defrosting cycles for defrosting sorption type systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a lithium bromide-based low-temperature medicinal material drying device, which belongs to the technical field of low-temperature drying technology and waste heat utilization. The lithium bromide solution circulation and the refrigerant circulation form a parallel loop, and two branches are branched from a generator in the lithium bromide solution circulation to complete the lithium bromide solution circulation and the refrigerant circulation; the low-temperature drying air channel is connected with the refrigerant cycle in parallel through an evaporator in the refrigerant cycle, and the evaporator is used for cooling and dehumidifying air. The utility model provides a medicinal material drying device effectively utilizes the technology waste heat to carry out lithium bromide absorption refrigeration cycle, reduces the air moisture content who flows from the drying cabinet to collect moisture in the evaporimeter, prevent simultaneously because of moisture subcooling frosts in the evaporimeter is inside, adopt hot-water line defrosting, improve operating stability.
Description
Technical Field
The invention relates to a lithium bromide-based low-temperature medicinal material drying device, and belongs to the technical field of low-temperature drying technology and waste heat utilization.
Background
In order to ensure valuable ingredients in the traditional Chinese medicinal materials, the drying temperature in the medicine process needs to be strictly and accurately controlled, and at present, the drying methods commonly used in the market comprise hot air drying, vacuum freeze drying, low-temperature drying and the like. The hot air drying method transfers heat to materials by utilizing hot air, so that water in the medicinal materials is evaporated and diffused into the air, the method is very simple, the dried medicinal materials have good appearance, but the processed medicinal materials have loss of nutrient components, and the medicinal curative effect cannot be well exerted; the vacuum freeze-drying method is that under certain conditions, solid ice generated by medicinal materials is directly sublimated to be changed into gaseous water vapor, and the treated medicinal materials have higher nutritive value and sensory quality, but the method has long operation time, large energy consumption and higher equipment investment cost, and is not beneficial to large-scale production and use; the low-temperature drying method can better preserve the shape, color, taste and drug property of the medicinal materials, and has the advantages of high efficiency, low energy consumption, short drying time and the like compared with vacuum freeze drying.
In the pharmaceutical field, active ingredients and active ingredients in medicinal products are usually obtained by organic chemical combination processes, and proper reaction conditions need to be provided for completing the processes. Larger pharmaceutical plants consume large amounts of energy to achieve reaction conditions and produce waste gases, waste waters and waste residues that pollute the ecological environment. Among them, the waste gas generated in the pharmaceutical process contains a large amount of process waste heat which cannot be directly utilized, and the waste heat is discharged into the atmospheric environment, which causes the aggravation of environmental thermal pollution. Then, the reasonable utilization of the process waste heat becomes the key for reducing the environmental temperature and improving the ecological quality.
The invention utilizes low-temperature drying technology to cool and dehumidify the air in the evaporator, the moisture in the air is adhered to the inner wall of the evaporator in the form of liquid water drops, the dried low-temperature air enters the drying box under the suction action of the fan to skim the surface of the medicinal material and take away the moisture in the medicinal material, so as to meet the moisture content requirement of the medicinal material in the preparation process.
Disclosure of Invention
The invention provides a lithium bromide-based low-temperature medicinal material drying device, which overcomes the defects of the prior art, adopts a low-temperature drying technology, prolongs the storage time of medicinal materials, greatly keeps the original appearance and quality of the medicinal materials, and simultaneously takes waste heat generated in the pharmaceutical process as energy power of a lithium bromide absorption refrigerator, fully utilizes the waste heat and promotes the cascade utilization of energy.
The invention realizes the aim through the following technical scheme: a low-temperature medicinal material drying device based on lithium bromide comprises a lithium bromide solution circulation system, a refrigerant circulation system, a low-temperature drying air channel circulation system and a hot water pipeline.
The lithium bromide solution circulation comprises a generator, a waste heat recoverer, a pressure reducing valve, an absorber, a first spraying device, a generator pump and a second spraying device; wherein the generator is filled with a lithium bromide concentrated solution, and the absorber is filled with a lithium bromide dilute solution; the solution outlet end of the generator is connected with the inlet end of the pressure reducing valve through a waste heat recoverer, the generator is also connected in parallel with a waste heat pipeline, the outlet end of the pressure reducing valve is connected with a first spraying device in the absorber, the solution outlet end of the absorber is connected with the inlet end of a generator pump, the absorber is also connected in parallel with a cooling water pipeline, and the outlet end of the generator pump is connected with a second spraying device in the generator through the waste heat recoverer; a generator in the lithium bromide solution circulation absorbs waste heat, a refrigerant is heated and vaporized and is separated from the lithium bromide solution, so that the refrigerant and the lithium bromide solution are respectively circulated from two branches in the generator, and the lithium bromide solution circulation and the refrigerant circulation form a parallel loop; the concentrated lithium bromide solution in the generator sequentially passes through the waste heat recoverer, the pressure reducing valve, the first spraying device and the absorber, water vapor is absorbed in the absorber to become a dilute lithium bromide solution, then the dilute lithium bromide solution sequentially passes through the generator pump, the waste heat recoverer, the second spraying device and the generator, and the water vapor is released in the generator to become the concentrated lithium bromide solution, so that a closed loop is formed.
The refrigerant cycle comprises a generator, a condenser, an expansion valve, an evaporator and an absorber; the refrigerant outlet end of the generator is connected with the refrigerant inlet end of the condenser, the refrigerant outlet end of the condenser is connected with the inlet end of the expansion valve, the outlet end of the expansion valve is connected with the refrigerant inlet end of the evaporator, and the refrigerant outlet end of the evaporator is connected with the absorber; the evaporator is connected in parallel with the low-temperature drying air duct for circulation; the refrigerant vaporized from the generator passes through the condenser, the expansion valve and the evaporator in sequence, is finally absorbed by the lithium bromide dilute solution in the absorber, and is conveyed to the generator together with the lithium bromide dilute solution through a pipeline to form a closed loop.
The low-temperature drying air channel circulation comprises an evaporator, a first air channel, a drying box, a fan and a second air channel; the evaporator outlet end is connected with the inlet end of the drying box through the first air channel, meanwhile, the outlet end of the drying box is connected with the inlet end of the fan, the outlet end of the fan is connected with the inlet end of the evaporator through the second air channel, a third spraying device is arranged in the evaporator, and the lower portion of the evaporator is connected with a second stop valve.
The hot water pipeline comprises a heat storage water tank, a hot water outlet of the heat storage water tank is divided into two branches, a first stop valve and a third spraying device are connected in series on one branch, the other branch is connected in series with a heat exchange tube in the first air channel, heat is released through the heat exchange tube to heat air in the first air channel, and an outlet of the heat exchange tube is connected with the third stop valve.
Preferably, the lithium bromide solution circularly absorbs the process waste heat, the refrigerant absorbs heat in the generator and is vaporized, then the refrigerant enters the condenser, and the lithium bromide concentrated solution in the generator enters the absorber through the waste heat recoverer and the pressure reducing valve.
Preferably, the low-temperature drying air channel circularly takes air as a carrier, absorbs moisture of the medicinal materials in the drying box, and cools and dews in the evaporator to release liquid water.
Preferably, the waste heat pipeline inlet, the generator, the heat storage water tank and the waste heat pipeline outlet are sequentially connected in series through the waste heat pipeline, and the waste heat pipeline releases heat to the lithium bromide concentrated solution of the generator and water in the heat storage water tank respectively.
Further preferably, the cooling water line inlet, the absorber, the condenser, the heat storage water tank and the cooling water line outlet are connected in series through the cooling water line, and the cooling water line absorbs heat in the absorber and the condenser, respectively, and transfers the absorbed heat to water in the heat storage water tank.
More preferably, a water filling port is arranged above the heat storage water tank.
The invention has the beneficial effects that: (1) the lithium bromide absorption refrigeration system is adopted, the process waste heat is effectively utilized, the cold quantity required by low-temperature drying is obtained, meanwhile, the hot water pipeline in the first air channel is used for heating, cooling and dehumidifying air, and no extra energy input is needed in the whole process; compared with a chlorofluorocarbon compound refrigerant adopted by a common compression type refrigerating system, the lithium bromide absorption type refrigeration adopts water as the refrigerant, does not damage the atmospheric ozone layer, is very friendly to the ecological environment, and is an energy-saving and environment-friendly refrigeration mode.
(2) The low-temperature drying technology reduces the relative humidity of air, improves the capacity of absorbing the surface moisture of the traditional Chinese medicinal materials, reduces the moisture of the traditional Chinese medicinal materials to a specified content, effectively prolongs the storage time, accelerates the drying process, ensures that the traditional Chinese medicinal materials and preparations can be used in the pharmaceutical process of the next link in time, and better keeps the original appearance and quality of the traditional Chinese medicinal materials.
(3) The cooling water pipeline and the waste heat pipeline are used for heating the heat storage water tank, waste heat is utilized in a gradient mode, and heat pollution to the outdoor environment is reduced.
(4) The hot water pipeline is divided into two branches from the outlet of the heat storage water tank, one branch is used for defrosting of the evaporator, and the other branch heats air in the first air channel, and meanwhile, the requirements of process/domestic hot water can be met.
Drawings
Fig. 1 is a schematic view of the structural principle of the present invention.
In the figure: 1. the system comprises a generator, 2, a waste heat recoverer, 3, a pressure reducing valve, 4, an absorber, 5, a first spray device, 6, a generator pump, 7, a second spray device, 8, a condenser, 9, an expansion valve, 10, an evaporator, 11, a first air duct, 12, a drying box, 13, a medicinal material drying disc, 14, a fan, 15, a water filling port, 16, a heat storage water tank, 17, a first stop valve, 18, a third spray device, 19, a second stop valve, 20, a third stop valve, 21, a waste heat pipeline inlet, 22, a waste heat pipeline outlet, 23, a cooling water pipeline inlet, 24, a cooling water pipeline outlet, 25, a second air duct, 26 and a hot water pipeline outlet.
Detailed Description
The present invention is further explained with reference to the attached drawings, it is to be noted that the following detailed description is provided for further explanation of the present invention, and should not be construed as limiting the scope of the present invention, and those skilled in the art can make modifications and adaptations of the present invention based on the above-mentioned contents.
As shown in fig. 1, a low-temperature medicinal material drying device based on lithium bromide comprises: lithium bromide solution circulation, refrigerant circulation, low-temperature drying air channel circulation and a hot water pipeline.
The lithium bromide solution circulation comprises a generator 1, a waste heat recoverer 2, a pressure reducing valve 3, an absorber 4, a first spraying device 5, a generator pump 6 and a second spraying device 7; wherein the generator 1 has a lithium bromide concentrated solution and the absorber 4 has a lithium bromide dilute solution; the solution outlet end of the generator 1 is connected with the inlet end of a pressure reducing valve 3 through a waste heat recoverer 2, the generator 1 is also connected in parallel with a waste heat pipeline, the outlet end of the pressure reducing valve 3 is connected with a first spraying device 5 in an absorber 4, the solution outlet end of the absorber 4 is connected with the inlet end of a generator pump 6, the absorber 4 is also connected in parallel with a cooling water pipeline, and the outlet end of the generator pump 6 is connected with a second spraying device 7 in the generator 1 through the waste heat recoverer 2; the generator 1 in the lithium bromide solution circulation absorbs waste heat, the refrigerant is heated and vaporized and is separated from the lithium bromide solution, so that the refrigerant and the lithium bromide solution are respectively circulated from two branches in the generator 1, and the lithium bromide solution circulation and the refrigerant circulation form a parallel loop; the lithium bromide concentrated solution in the generator 1 sequentially passes through the waste heat recoverer 2, the pressure reducing valve 3, the first spraying device 5 and the absorber 4, water vapor is absorbed in the absorber 4 to become a lithium bromide dilute solution, then the lithium bromide dilute solution passes through the generator pump 6, the waste heat recoverer 2, the second spraying device 7 and the generator 1 once, and the water vapor is released in the generator 1 to become the lithium bromide concentrated solution, so that a closed loop is formed; the lithium bromide solution circularly absorbs the process waste heat, the refrigerant absorbs heat and is vaporized in the generator 1, then the refrigerant enters the condenser 8, and the lithium bromide concentrated solution in the generator 1 enters the absorber 4 through the waste heat recoverer 2 and the pressure reducing valve 3.
The waste heat pipeline inlet 21, the generator 1, the heat storage water tank 16 and the waste heat pipeline outlet 22 are sequentially connected in series through the waste heat pipeline, and the waste heat pipeline respectively releases heat to the lithium bromide concentrated solution of the generator 1 and the water in the heat storage water tank 16; the cooling water line inlet 23, the absorber 4, the condenser 8, the hot water storage 16, and the cooling water line outlet 24 are connected in series through the cooling water line, and the cooling water line absorbs heat in the absorber 4 and the condenser 8, respectively, and transfers the absorbed heat to the water of the hot water storage tank 16.
The refrigerant cycle comprises a generator 1, a condenser 8, an expansion valve 9, an evaporator 10 and an absorber 4; the refrigerant outlet end of the generator 1 is connected with the refrigerant inlet end of the condenser 8, the refrigerant outlet end of the condenser 8 is connected with the inlet end of the expansion valve 9, the outlet end of the expansion valve 9 is connected with the refrigerant inlet end of the evaporator 10, and the refrigerant outlet end of the evaporator 10 is connected with the absorber 4; the evaporator 10 is connected in parallel with the low-temperature drying air duct for circulation; the refrigerant vaporized from the generator 1 passes through the condenser 8, the expansion valve 9 and the evaporator 10 in sequence, is finally absorbed by the lithium bromide dilute solution in the absorber 4, and is conveyed to the generator 1 together with the lithium bromide dilute solution through a pipeline to form a closed loop.
The low-temperature drying air duct circulation comprises; the drying device comprises an evaporator 10, a first air duct 11, a drying box 12, a fan 14 and a second air duct 25, wherein the outlet end of the evaporator 10 is connected with the inlet end of the drying box 12 through the first air duct 11, meanwhile, the outlet end of the drying box 12 is connected with the inlet end of the fan 14, the outlet end of the fan 14 is connected with the inlet end of the evaporator 10 through the second air duct 25, and a third spraying device 18 is arranged in the evaporator 10.
The low-temperature drying air channel circulation uses air as a carrier, absorbs moisture of traditional Chinese medicinal materials in the drying box 12, cools and dews in the evaporator 10 to release liquid water, and the lower part of the evaporator 10 is connected with a second stop valve 19.
The air absorbs the heat of the hot water pipeline in the first air channel 11, reduces the relative humidity of the air, improves the water absorbing capacity of the air, and simultaneously, the suction effect of the fan 14 enables the first air channel 11 to form a low-pressure area, the second air channel 25 forms a high-pressure area, the pressure difference between the air channels pushes the air to form circulation in the circulation of the low-temperature drying air channel, the air is in full contact with the surface of the medicinal materials in the drying box 12, the surface moisture of the air is absorbed, and the air is cooled in the evaporator and condensed to release liquid water.
The hot water pipeline comprises a heat storage water tank 16, a hot water outlet of the heat storage water tank is divided into two branches, one branch is connected with a first stop valve 17 and a third spraying device 18 in series, the other branch is connected with a heat exchange tube in the first air channel 11 in series, heat is released through the heat exchange tube to heat air in the first air channel 11, an outlet of the heat exchange tube is connected with a third stop valve 20, and a water filling port 15 is arranged above the heat storage water tank 16.
The third spray device sprays the hot water in the form of mist-like droplets on the frost on the inner surface of the evaporator 10, melts the frost into liquid, and uses the liquid for the cooling water line by opening the second stop valve 19 at the bottom, and replenishes water into the hot water storage tank 16 through the water filling port 15, and the hot water after heat exchange can be used for process/domestic hot water supply by opening the third stop valve 20.
The working principle and the process thereof are as follows: the lithium bromide concentrated solution in the generator 1 is heated by the waste heat, the lithium bromide solution is separated from the refrigerant due to the difference of the boiling points of the lithium bromide solution and the refrigerant, the refrigerant escapes from the lithium bromide concentrated solution in a gas form and enters the condenser 8, the concentrated high-temperature lithium bromide concentrated solution enters the waste heat recoverer 2 to exchange heat with the dilute solution from the absorber 4, the refrigerant is decompressed by a decompression valve 3, reaches an absorber 4, is sprayed on a cooling water pipeline in the form of mist liquid drops by a first spraying device 5, absorbs the refrigerant from an evaporator 10, is diluted into dilute solution, and after the lithium bromide dilute solution is boosted by a generator pump 6, exchanging heat with the high-temperature lithium bromide concentrated solution from the generator 1 through the waste heat recoverer 2, finally entering a second spraying device 7 in the generator 1, spraying the waste heat pipeline in the form of mist liquid drops to complete the circulation of the lithium bromide solution.
Meanwhile, the lithium bromide concentrated solution in the generator 1 absorbs the heat of the waste heat pipeline, the generated high-temperature and high-pressure gaseous refrigerant enters the condenser 8 and is condensed into liquid in the condenser 8, the refrigerant is decompressed and throttled by the expansion valve 9 and enters the evaporator 10, heat exchange is carried out between the refrigerant and air through the evaporator 10, the heat of the air is absorbed and vaporized, and finally the refrigerant enters the absorber 4 and is absorbed by the lithium bromide dilute solution in the absorber, so that the refrigerant circulation is completed.
Air with high moisture content enters the evaporator 10 through the first air duct 11 to perform indirect heat exchange with a refrigerant, the air temperature is reduced, water is separated from the air and is collected in the evaporator 10, the air after temperature reduction and drying exchanges heat with one branch of a hot water pipeline, the water absorption capacity of the air is enhanced after temperature rise, the first air duct 11 forms a high-pressure area through the suction effect of the fan 14, the second air duct 25 forms a low-pressure area, the air is pushed by the pressure difference between the air ducts to form circulation in the low-temperature drying air duct circulation, the air is fully contacted with the surfaces of medicinal materials in the drying box 12, the surface moisture of the medicinal materials is absorbed, the drying efficiency of the medicinal materials is improved, and then the air after water absorption enters the evaporator to be cooled, condensed and releases liquid water to complete the low-temperature drying.
Further, if the temperature inside the evaporator 10 is too low, and the water in the evaporator 10 is too cold to form large-area frost formation, the first stop valve 17 and the second stop valve 19 are opened, the third stop valve 20 is closed, hot water flows out of the heat storage water tank 16 and enters the third spraying device 18 to be sprayed out in the form of mist liquid drops, the frost is absorbed and melted into low-temperature liquid, and the second stop valve 19 is opened to be used for a cooling water pipeline, so that the problem of frost formation of the evaporator is solved; if the process/domestic hot water needs to be provided, the third stop valve 20 is opened, the first stop valve 17 and the second stop valve 19 are closed, and the hot water flows out of the heat storage water tank 16, passes through the first air duct 11, flows into each process/domestic hot water utilization link through the third stop valve 20 and the hot water pipeline outlet 26; if it is desired to melt the frost of the evaporator 10, heat the air in the first duct 11 and the process/domestic hot water supply at the same time, the first cut-off valve 17, the second cut-off valve 19 and the third cut-off valve 20 are opened.
Further, if the amount of water in the hot water storage tank 16 is not enough to supply the medicinal material drying apparatus of the present application, water supply is performed through the water injection port 15 on the hot water storage tank 16.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The utility model provides a based on lithium bromide low temperature medicinal material drying device which characterized in that: the system comprises a lithium bromide solution cycle, a refrigerant cycle, a low-temperature drying air channel cycle and a hot water pipeline; the lithium bromide solution circulation comprises a generator (1), a waste heat recoverer (2), a pressure reducing valve (3), an absorber (4), a first spraying device (5), a generator pump (6) and a second spraying device (7); wherein the generator (1) is filled with a lithium bromide concentrated solution, and the absorber (4) is filled with a lithium bromide dilute solution; the solution outlet end of the generator (1) is connected with the inlet end of a pressure reducing valve (3) through a waste heat recoverer (2), the generator (1) is also connected in parallel with a waste heat pipeline, the outlet end of the pressure reducing valve (3) is connected with a first spraying device (5) in an absorber (4), the solution outlet end of the absorber (4) is connected with the inlet end of a generator pump (6), the absorber (4) is also connected in parallel with a cooling water pipeline, and the outlet end of the generator pump (6) is connected with a second spraying device (7) in the generator (1) through the waste heat recoverer (2); the generator (1) in the lithium bromide solution circulation absorbs waste heat, the refrigerant is heated and vaporized and is separated from the lithium bromide solution, so that the refrigerant and the lithium bromide solution are respectively circulated from two branches in the generator (1), and the lithium bromide solution circulation and the refrigerant circulation form a parallel loop; the lithium bromide concentrated solution in the generator (1) sequentially passes through the waste heat recoverer (2), the pressure reducing valve (3), the first spraying device (5) and the absorber (4), water vapor is absorbed in the absorber (4) to become lithium bromide dilute solution, then the lithium bromide dilute solution sequentially passes through the generator pump (6), the waste heat recoverer (2), the second spraying device (7) and the generator (1), and the water vapor is released in the generator (1) to become the lithium bromide concentrated solution, so that a closed loop is formed; the refrigerant cycle comprises a generator (1), a condenser (8), an expansion valve (9), an evaporator (10) and an absorber (4); the refrigerant outlet end of the generator (1) is connected with the refrigerant inlet end of the condenser (8), the refrigerant outlet end of the condenser (8) is connected with the inlet end of the expansion valve (9), the outlet end of the expansion valve (9) is connected with the refrigerant inlet end of the evaporator (10), and the refrigerant outlet end of the evaporator (10) is connected with the absorber (4); the evaporator (10) is connected in parallel with the low-temperature drying air duct for circulation; refrigerant vaporized from the generator (1) passes through the condenser (8), the expansion valve (9) and the evaporator (10) in sequence, is finally absorbed by the lithium bromide dilute solution in the absorber (4), and is conveyed to the generator (1) together with the lithium bromide dilute solution through a pipeline to form a closed loop; the low-temperature drying air channel circularly comprises an evaporator (10), a first air channel (11), a drying box (12), a fan (14) and a second air channel (25); the outlet end of the evaporator (10) is connected with the inlet end of the drying box (12) through the first air duct (11), meanwhile, the outlet end of the drying box (12) is connected with the inlet end of the fan (14), the outlet end of the fan (14) is connected with the inlet end of the evaporator (10) through the second air duct (25), a third spraying device (18) is arranged in the evaporator (10), and the lower part of the evaporator (10) is connected with a second stop valve (19); the hot water pipeline comprises a heat storage water tank (16), a hot water outlet of the heat storage water tank is divided into two branches, one branch is connected with a first stop valve (17) and a third spraying device (18) in series, the other branch is connected with a heat exchange tube in the first air channel (11) in series, heat is released through the heat exchange tube to heat air in the first air channel (11), and an outlet of the heat exchange tube is connected with a third stop valve (20).
2. Drying apparatus according to claim 1, wherein: the lithium bromide solution circularly absorbs the process waste heat, the refrigerant absorbs heat in the generator (1) and is vaporized, then the refrigerant enters the condenser (8), and the lithium bromide concentrated solution in the generator (1) enters the absorber (4) through the waste heat recoverer (2) and the pressure reducing valve (3).
3. Drying apparatus according to claim 1, wherein: the low-temperature drying air channel circularly takes air as a carrier, absorbs moisture of traditional Chinese medicinal materials in the drying box (12), and cools and dews in the evaporator (10) to release liquid water.
4. Drying apparatus according to claim 1, wherein: the waste heat pipeline is used for sequentially connecting a waste heat pipeline inlet (21), the generator (1), the heat storage water tank (16) and a waste heat pipeline outlet (22) in series, and the waste heat pipeline respectively releases heat to lithium bromide concentrated solution of the generator (1) and water in the heat storage water tank (16).
5. Drying apparatus according to claim 1, wherein: a cooling water pipeline inlet (23), an absorber (4), a condenser (8), a heat storage water tank (16) and a cooling water pipeline outlet (24) are connected in series through the cooling water pipeline, the cooling water pipeline absorbs heat in the absorber (4) and the condenser (8) respectively, and the absorbed heat is transferred to water in the heat storage water tank (16).
6. Drying apparatus according to claim 1, wherein: and a water filling port (15) is arranged above the heat storage water tank (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110108009.4A CN112432492B (en) | 2021-01-27 | 2021-01-27 | Based on lithium bromide low temperature medicinal material drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110108009.4A CN112432492B (en) | 2021-01-27 | 2021-01-27 | Based on lithium bromide low temperature medicinal material drying device |
Publications (2)
| Publication Number | Publication Date |
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| CN112432492A CN112432492A (en) | 2021-03-02 |
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| CN107036402B (en) * | 2017-05-17 | 2019-02-01 | 东南大学 | A kind of solar energy double effect absorption type heat pump drying system with accumulation of heat |
| CN109269143B (en) * | 2018-10-26 | 2024-04-16 | 中交第四航务工程勘察设计院有限公司 | Novel absorption heat pump and application method thereof |
| CN110005492B (en) * | 2019-03-20 | 2021-05-04 | 江苏科技大学 | Device for performing fractionation, drying and power generation by comprehensively utilizing waste heat of factory and working method |
| CN111442568A (en) * | 2020-04-11 | 2020-07-24 | 青岛达能环保设备股份有限公司 | Waste heat recycling system based on low-energy-consumption hot air supply |
| CN111947443B (en) * | 2020-07-24 | 2022-03-01 | 浙江工业大学 | Closed cycle drying system of open absorption heat pump-MVR technical coupling |
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