CN111457615A - Direct-fired regenerative drying system and using method thereof - Google Patents
Direct-fired regenerative drying system and using method thereof Download PDFInfo
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- CN111457615A CN111457615A CN202010327540.6A CN202010327540A CN111457615A CN 111457615 A CN111457615 A CN 111457615A CN 202010327540 A CN202010327540 A CN 202010327540A CN 111457615 A CN111457615 A CN 111457615A
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- 238000001035 drying Methods 0.000 title claims abstract description 104
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 240
- 239000002918 waste heat Substances 0.000 claims abstract description 77
- 230000008929 regeneration Effects 0.000 claims abstract description 35
- 238000011069 regeneration method Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 6
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 6
- 239000002657 fibrous material Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 230000002528 anti-freeze Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 238000007791 dehumidification Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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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
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/083—Humidity by using sorbent or hygroscopic materials, e.g. chemical substances, molecular sieves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
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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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the technical field of dryers, and discloses a direct-fired regenerative drying system which comprises a rotary wheel dryer, wherein the rotary wheel dryer comprises a rotary wheel, drying materials for drying air flow are arranged on the rotary wheel, the rotary wheel dryer comprises a drying area positioned at the lower part and a regeneration area positioned at the upper part, the drying materials are switched between the drying area and the regeneration area through the rotation of the rotary wheel, an air inlet end of the drying area is connected with a surface cooler, an air outlet end of the drying area is sequentially connected with a reheater and a first fan, an air inlet end of the regeneration area is connected with a burner, an air outlet end of the regeneration area is sequentially connected with a waste heat recoverer and a second fan, a liquid outlet end of the waste heat recoverer is communicated with a liquid inlet end of the reheater, and a liquid outlet end of the reheate; also discloses a using method of the direct-fired regenerative drying system; the invention has the advantages of low operation cost, energy saving, environmental protection and continuous and stable operation.
Description
Technical Field
The invention relates to the technical field of drying systems, in particular to a direct-combustion type regeneration drying system and a using method thereof.
Background
The precise constant temperature and humidity air conditioner is widely applied to the industries of biotechnology, electronic industry, precision processing, food and medicine and the like, and has quite complex air treatment and extremely high energy consumption in order to ensure that the indexes of the precise constant temperature and humidity air conditioner, such as temperature, humidity, dust content and the like, meet the process requirements.
Wherein, the characteristics of precision air conditioner: firstly, the relative humidity of the supplied air is low, generally lower than 25 percent, the dehumidification requirement is particularly high, and the requirement can be met only by adopting a rotary dehumidifier; secondly, the air-conditioning room temperature control precision requirement is high, the precision is usually within +/-0.5 ℃, and the air supply temperature difference cannot be high, so that the air supply needs to be reheated before entering the room. However, in the prior art, the electric heating technology is usually adopted to heat the fresh air, and the power supply is used as a heat source, so that the operation cost is high, energy is not saved, the environment is protected, and the problem of capacity increase by electricity exists.
Disclosure of Invention
The invention aims to solve the problem of providing a direct-combustion type regeneration drying system and a using method thereof, which have the advantages of low operation cost, energy conservation, environmental protection and continuous and stable operation.
In order to solve the above technical problems, the present invention provides, in one aspect, a direct-combustion type regenerative drying system and a method for using the same, including a rotary wheel dryer, the rotary wheel dryer comprises a rotary wheel, a drying material for drying air flow is arranged on the rotary wheel, the rotary wheel dryer comprises a drying zone at the lower part and a regeneration zone at the upper part, the drying materials are switched between the drying zone and the regeneration zone through the rotation of the rotary wheel, the air inlet end of the drying area is connected with a surface cooler, the air outlet end of the drying area is sequentially connected with a reheater and a first fan, the air inlet end of the regeneration area is connected with a burner, the air outlet end of the regeneration area is sequentially connected with a waste heat recoverer and a second fan, and the liquid outlet end of the waste heat recoverer is communicated with the liquid inlet end of the reheater, and the liquid outlet end of the reheater is communicated with the liquid inlet end of the waste heat recoverer.
As the preferable scheme of the direct-fired regenerative drying system, the air inlet end of the surface cooler is connected with a first filter, and the air outlet end of the first fan is connected with a second filter.
As a preferable aspect of the direct combustion type regenerative drying system of the present invention, a third filter is connected between the burner and the regeneration zone.
As a preferred scheme of the direct-fired regenerative drying system, the liquid outlet end of the waste heat recoverer is communicated with the liquid inlet end of the reheater through a first liquid conveying pipe, the liquid outlet end of the reheater is communicated with the liquid inlet end of the waste heat recoverer through a second liquid conveying pipe, and a second electromagnetic valve, a water pump and a flow limiting valve are sequentially arranged on the first liquid conveying pipe along the water flow direction.
As a preferable scheme of the direct-fired regenerative drying system, the direct-fired regenerative drying system further comprises a liquid storage tank, a liquid inlet end of the liquid storage tank is communicated with the first liquid conveying pipe through a third liquid conveying pipe, a liquid inlet end of the third liquid conveying pipe is located between a liquid outlet end of the waste heat recoverer and the second electromagnetic valve, a third electromagnetic valve is arranged on the third liquid conveying pipe, a liquid outlet end of the liquid storage tank is communicated with the first liquid conveying pipe through a fourth liquid conveying pipe, a liquid outlet end of the fourth liquid conveying pipe is located between the second electromagnetic valve and the water pump, and a fourth electromagnetic valve is arranged on the fourth liquid conveying pipe.
As a preferable scheme of the direct-combustion type regenerative drying system of the present invention, the burner includes an igniter and a gas nozzle, the gas nozzle is connected to a gas supply device through a gas channel, the gas channel is provided with a first electromagnetic valve, and the igniter is disposed at a nozzle of the gas nozzle.
As a preferable scheme of the direct-combustion type regenerative drying system, the drying material is a honeycomb-shaped paper fiber material, and lithium bromide is uniformly arranged on the paper fiber material.
As a preferable aspect of the direct-combustion regenerative drying system of the present invention, the antifreeze solution is contained in the liquid storage tank.
The invention also provides a use method of the direct-combustion type regeneration drying system, which comprises the following steps:
starting a first fan, enabling fresh air to enter a surface cooler for cooling, enabling cooled clean air to enter a drying area of a dryer for drying and dehumidifying, enabling dried air after drying and dehumidifying to enter a reheater for heating, and discharging heated dried air;
starting a second fan, heating fresh air to a preset temperature through a combustor, then entering a regeneration area of the dryer, evaporating and taking out moisture of a drying material in the regeneration area, entering hot air subjected to moisture absorption into a waste heat recoverer, exchanging heat with liquid in the waste heat recoverer, and discharging warm air after heat exchange is finished;
and after the liquid in the reheater finishes heating the drying air, the liquid flows back to the waste heat recoverer to form a cycle.
As a preferred scheme of the use method of the direct-fired regenerative drying system, the liquid outlet end of the waste heat recoverer is communicated with the liquid inlet end of the reheater through a first liquid conveying pipe, the liquid outlet end of the reheater is communicated with the liquid inlet end of the waste heat recoverer through a second liquid conveying pipe, and a second electromagnetic valve, a water pump and a flow limiting valve are sequentially arranged on the first liquid conveying pipe along the water flow direction;
the direct-fired regenerative drying system further comprises a liquid storage tank, a liquid inlet end of the liquid storage tank is communicated with the first liquid storage pipe through a third liquid storage pipe, a liquid inlet end of the third liquid storage pipe is located between a liquid outlet end of the waste heat recoverer and the second electromagnetic valve, a third electromagnetic valve is arranged on the third liquid storage pipe, a liquid outlet end of the liquid storage tank is communicated with the first liquid storage pipe through a fourth liquid storage pipe, a liquid outlet end of the fourth liquid storage pipe is located between the second electromagnetic valve and the water pump, and a fourth electromagnetic valve is arranged on the fourth liquid storage pipe;
when in work, the method comprises the following steps:
step one, closing a second electromagnetic valve, opening a third electromagnetic valve, a fourth electromagnetic valve and a flow limiting valve, enabling liquid in a liquid storage tank to enter a water pump through a fourth liquid conveying pipe, enabling the liquid to enter a reheater through a first liquid conveying pipe and the flow limiting valve, heating the dried and dehumidified dry air, enabling the liquid to enter a waste heat recoverer through a second liquid conveying pipe after the liquid is heated in the reheater, exchanging heat with the hot air after moisture absorption, and enabling the liquid to flow back to the liquid storage tank through the first liquid conveying pipe and the third liquid conveying pipe after the liquid exchanges heat in the waste heat recoverer to form circulation;
and step two, after the liquid exchanges heat between the reheater and the waste heat recoverer stably, opening the second electromagnetic valve, closing the third electromagnetic valve and the fourth electromagnetic valve, after the liquid exchanges heat in the waste heat recoverer, enabling the liquid to enter the water pump through the first liquid pipe, and to enter the reheater through the flow limiting valve to heat the dried and dehumidified dry air, and after the liquid is heated in the reheater, enabling the liquid to flow back to the waste heat recoverer through the second liquid pipe to form circulation.
Compared with the prior art, the direct-fired regenerative drying system and the using method thereof have the following beneficial effects:
the drying material in the rotary wheel dryer is switched between the drying area and the regeneration area through the rotation of the rotary wheel, when the drying material is positioned in the drying area, the drying material dries fresh air, and when the drying material is positioned in the regeneration area, moisture on the drying material is heated and evaporated by hot air and is taken out, so that the drying material recovers a dehumidification function; the heated hot air exchanges heat with liquid in the waste heat recoverer to provide heat for the liquid in the waste heat recoverer, the liquid in the waste heat recoverer flows into a reheater to heat dried dry air after heat exchange is completed, and the liquid in the reheater flows back to the waste heat recoverer to form circulation after heat exchange is completed, so that the liquid exchanges heat circularly between the waste heat recoverer and the reheater, water sources are saved, and the heat exchange process can be guaranteed to be stable and continuous; compared with the prior art that a power supply is used as a heat source, the hot air dehumidifying device has the advantages that the hot air heat source is used as the heat source, the environment is protected, the energy is saved, the problem of electricity consumption capacity increase can be solved, the manufacturing cost and the operating cost are reduced, and the operating cost of the hot air heat source used as the heat source is about 30% of the operating cost of the prior art that the power supply is used as the heat source. Therefore, the invention has the advantages of low operation cost, energy saving, environmental protection and continuous and stable operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a flow diagram of a direct-fired regenerative drying system provided by the present invention;
FIG. 2 is a schematic diagram of the connection of a waste heat recoverer and a reheater;
fig. 3 is a schematic view of the structure of the burner.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., used herein are used in the orientation or positional relationship indicated in the drawings, which are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, an aspect of the present invention provides a preferred embodiment of a direct-fired regenerative drying system, which includes a rotary dryer 1, where the rotary dryer 1 includes a rotary wheel 2, the rotary wheel 2 is provided with a drying material for drying an air flow, the rotary dryer 1 includes a drying region 3 located at a lower portion and a regeneration region 4 located at an upper portion, the drying material is switched between the drying region 3 and the regeneration region 4 by rotation of the rotary wheel 2, an air inlet end of the drying region 3 is connected to a surface cooler 5, an air outlet end of the drying region 3 is connected to a reheater 6 and a first fan 7 in sequence, an air inlet end of the regeneration region 4 is connected to a burner 8, an air outlet end of the regeneration region 4 is connected to a waste heat recoverer 9 and a second fan 10 in sequence, an liquid outlet end of the waste heat recoverer 9 is communicated to a liquid inlet end of the reheater 6, and the liquid outlet end of the reheater 6 is communicated with the liquid inlet end of the waste heat recoverer 9. Specifically, the waste heat recoverer 9 is a surface coil heat exchanger.
Therefore, the drying materials in the rotary wheel dryer 1 are switched between the drying area 3 and the regeneration area 4 through the rotation of the rotary wheel 2, when the drying materials are positioned in the drying area 3, the drying materials dry fresh air, and when the drying materials are positioned in the regeneration area 4, moisture on the drying materials is heated and evaporated by hot air and is taken out, so that the drying materials recover the dehumidification function; the heated hot air exchanges heat with liquid in the waste heat recoverer 9 to provide heat for the liquid in the waste heat recoverer 9, the liquid in the waste heat recoverer 9 flows into the reheater 6 after heat exchange, and is heated for dried dry air, and the liquid in the reheater 6 flows back to the waste heat recoverer 9 to form circulation after heat exchange is completed, so that the liquid exchanges heat circularly between the waste heat recoverer 9 and the reheater 6, water sources are saved, and the heat exchange process can be guaranteed to be stable and continuous; compared with the prior art that a power supply is used as a heat source, the hot air dehumidifying device has the advantages that the hot air heat source is used as the heat source, the environment is protected, the energy is saved, the problem of electricity consumption capacity increase can be solved, the manufacturing cost and the operating cost are reduced, and the operating cost of the hot air heat source used as the heat source is about 30% of the operating cost of the prior art that the power supply is used as the heat source. Therefore, the invention has the advantages of low operation cost, energy saving, environmental protection and continuous and stable operation.
Illustratively, an air inlet end of the surface air cooler 5 is connected with a first filter 11, an air outlet end of the first fan 7 is connected with a second filter 12, and the first filter 11 can filter fresh air entering the direct-combustion type regenerative drying system, purify the air and prevent particle impurities in the air from damaging the dryer; the second filter 12 can filter the dry air discharged from the direct-fired regenerative drying system, purify the air, ensure that the discharged dry air is clean and pollution-free, and make the air in the room fresh and dust-free.
Illustratively, a third filter 13 is connected between the burner 8 and the regeneration zone 4, the third filter 13 being capable of filtering dust contained in the fresh air and solid dust possibly generated after combustion by the burner 8.
For example, as shown in fig. 2, a liquid outlet end of the waste heat recoverer 9 is communicated with a liquid inlet end of the reheater 6 through a first liquid conveying pipe 14, a liquid outlet end of the reheater 6 is communicated with the liquid inlet end of the waste heat recoverer 9 through a second liquid conveying pipe 15, and a second electromagnetic valve 16, a water pump 17 and a flow limiting valve 18 are sequentially arranged on the first liquid conveying pipe 14 along a water flow direction. By adopting the design, the liquid flow from the waste heat recoverer 9 to the reheater 6 can be controlled through the water pump 17 and the flow limiting valve 18, so that the liquid capacity in the reheater 6 is controlled, and the heat exchange temperature between the liquid in the reheater 6 and the drying air is indirectly controlled.
Exemplarily, the direct-fired regenerative drying system further comprises a liquid storage tank 19, a liquid inlet end of the liquid storage tank 19 is communicated with the first liquid conveying pipe 14 through a third liquid conveying pipe 20, a liquid inlet end of the third liquid conveying pipe 20 is located between a liquid outlet end of the waste heat recoverer 9 and the second electromagnetic valve 16, a third electromagnetic valve 21 is arranged on the third liquid conveying pipe 20, a liquid outlet end of the liquid storage tank 19 is communicated with the first liquid conveying pipe 14 through a fourth liquid conveying pipe 22, a liquid outlet end of the fourth liquid conveying pipe 22 is located between the second electromagnetic valve 16 and the water pump 17, and a fourth electromagnetic valve 23 is arranged on the fourth liquid conveying pipe 22. Specifically, the liquid storage tank 19 contains an antifreeze solution.
In this embodiment, as shown in fig. 3, the burner 8 includes an igniter 81 and a gas nozzle 82, the gas nozzle 82 is connected to a gas supply device through a gas channel 83, the gas channel 83 is provided with a first electromagnetic valve 84, and the igniter 81 is disposed at a nozzle of the gas nozzle 82. Specifically, the distance between the igniter 81 and the gas nozzle 82 is 2 mm-3 mm.
Illustratively, the drying material is a honeycomb-shaped paper fiber material, and lithium bromide is uniformly arranged on the paper fiber material, is very soluble in water, has stable property, and is not easy to deteriorate and decompose in the atmosphere.
Based on the direct-fired regenerative drying system, the embodiment of the invention also provides a using method of the direct-fired regenerative drying system, which comprises the following steps:
starting a first fan 7, filtering fresh air through a first filter 11, then cooling the fresh air in a surface cooler 5, allowing cooled clean air to enter a drying area 3 of the rotary wheel dryer 1 for drying and dehumidifying, allowing the dried air after drying and dehumidifying to enter a reheater 6 for heating, filtering the heated dried air through a second filter 12, and discharging the filtered dried air;
the drying material in the rotary wheel dryer 1 is switched between the drying area 3 and the regeneration area 4 through the rotation of the rotary wheel 2, and when the drying material is positioned in the drying area 3, the drying material dries fresh air; the first filter 11 can filter fresh air entering the direct-fired regenerative drying system, purify air and prevent particulate impurities in the air from damaging the dryer; the second filter 12 can filter the dry air discharged from the direct-fired regenerative drying system, purify the air, ensure that the discharged dry air is clean and pollution-free, and make the air in the room fresh and dust-free.
Starting a second fan 10, heating fresh air to a preset temperature through a combustor 8, filtering the fresh air through a third filter 13, allowing the filtered hot air to enter a regeneration area 4 of the rotary wheel dryer 1, evaporating and taking out moisture of a drying material in the regeneration area 4, allowing the moisture-absorbed hot air to enter a waste heat recoverer 9, exchanging heat with liquid in the waste heat recoverer 9, and discharging warm air after heat exchange is completed;
when the drying material is positioned in the regeneration area 4, the moisture on the drying material is heated and evaporated by hot air and is taken out, so that the dehumidifying function of the drying material is recovered; the heated hot air exchanges heat with the liquid in the waste heat recoverer 9 to provide heat for the liquid in the waste heat recoverer 9; the third filter 13 is able to filter the dust contained in the fresh air and the solid dust that may be generated after combustion by said burner 8.
After heat exchange of liquid in the waste heat recoverer 9 is completed, the liquid flows into the reheater 6 and heats dried and dehumidified dry air, and after the liquid in the reheater 6 heats the dry air, the liquid flows back to the waste heat recoverer 9 to form a cycle;
after heat exchange is completed, liquid in the waste heat recoverer 9 flows into the reheater 6 and heats dried dry air, and after heat exchange is completed, the liquid in the reheater 6 flows back to the waste heat recoverer 9 to form circulation, so that the liquid can circularly exchange heat between the waste heat recoverer 9 and the reheater 6, water sources are saved, and the stable and continuous heat exchange process can be ensured; compared with the prior art that a power source is used as a heat source, the hot air dehumidifying device disclosed by the invention uses the hot air heat source as the heat source, is green and environment-friendly, and saves energy.
For example, the liquid outlet end of the waste heat recoverer 9 is communicated with the liquid inlet end of the reheater 6 through a first liquid pipe 14, the liquid outlet end of the reheater 6 is communicated with the liquid inlet end of the waste heat recoverer 9 through a second liquid pipe 15, and a second electromagnetic valve 16, a water pump 17 and a flow limiting valve 18 are sequentially arranged on the first liquid pipe 14 along the water flow direction;
the direct-fired regenerative drying system further comprises a liquid storage tank 19, a liquid inlet end of the liquid storage tank 19 is communicated with the first liquid conveying pipe 14 through a third liquid conveying pipe 20, a liquid inlet end of the third liquid conveying pipe 20 is located between a liquid outlet end of the waste heat recoverer 9 and the second electromagnetic valve 16, a third electromagnetic valve 21 is arranged on the third liquid conveying pipe 20, a liquid outlet end of the liquid storage tank 19 is communicated with the first liquid conveying pipe 14 through a fourth liquid conveying pipe 22, a liquid outlet end of the fourth liquid conveying pipe 22 is located between the second electromagnetic valve 16 and the water pump 17, and a fourth electromagnetic valve 23 is arranged on the fourth liquid conveying pipe 22;
when in work, the method comprises the following steps:
step one, closing a second electromagnetic valve 16, opening a third electromagnetic valve 21, a fourth electromagnetic valve 23 and a flow limiting valve 18, after liquid in a liquid storage tank 19 enters a water pump 17 through a fourth liquid conveying pipe 22, the liquid enters a reheater 6 through a first liquid conveying pipe 14 and the flow limiting valve 18, the dried and dehumidified dry air is heated, after the liquid is heated in the reheater 6, the liquid enters a waste heat recoverer 9 through a second liquid conveying pipe 15 and exchanges heat with the moisture-absorbed hot air, and after the liquid completes the heat exchange in the waste heat recoverer 9, the liquid flows back to the liquid storage tank 19 through the first liquid conveying pipe 14 and the third liquid conveying pipe 20 to form circulation;
due to the design, the reheater 6, the waste heat recoverer 9 and the infusion tube can be filled with liquid, air in the reheater 6, the waste heat recoverer 9 and the infusion tube can be effectively discharged, the heat exchange stability of the reheater 6 and the waste heat recoverer 9 is guaranteed, and the normal operation of the heat exchange process is guaranteed.
And step two, after the liquid exchanges heat between the reheater 6 and the waste heat recoverer 9 stably, the second electromagnetic valve 16 is opened, the third electromagnetic valve 21 and the fourth electromagnetic valve 23 are closed, the liquid enters the water pump 17 through the first liquid conveying pipe 14 after the heat exchange is completed in the waste heat recoverer 9, and enters the reheater 6 through the flow limiting valve 18 to heat the dried and dehumidified dry air, and the liquid flows back to the waste heat recoverer 9 through the second liquid conveying pipe 15 after the heating is completed in the reheater 6 to form circulation.
Due to the design, liquid circulates between the reheater 6 and the waste heat recoverer 9, so that the heat exchange stability of the reheater 6 and the waste heat recoverer 9 can be ensured, water sources can be saved, the environment-friendly effect is achieved, and the operation cost is reduced.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, either fixedly connected, detachably connected, or integrally connected, unless otherwise explicitly stated or limited; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. The utility model provides a direct-fired type regeneration drying system, its characterized in that, includes the rotary wheel desiccator, the rotary wheel desiccator includes the runner, be equipped with the dry material that is used for dry air current on the runner, the rotary wheel desiccator is including the dry zone that is located the lower part and the regeneration area that is located the upper portion, dry material passes through the rotation of runner the dry zone with switch over each other between the regeneration area, the air inlet end of dry zone is connected with the surface cooler, the air-out end of dry zone has connected gradually re-heater and first fan, the air inlet end of regeneration area is connected with the combustor, the air-out end of regeneration area has connected gradually waste heat recoverer and second fan, the play liquid end of waste heat recoverer with the feed liquor end intercommunication of re-heater, the play liquid end of re-heater with the feed liquor end intercommunication of waste heat recoverer.
2. The direct-fired regenerative drying system according to claim 1, wherein a first filter is connected to an air inlet end of the surface air cooler, and a second filter is connected to an air outlet end of the first fan.
3. A direct combustion type regenerative drying system according to claim 1, wherein a third filter is connected between said burner and said regeneration zone.
4. The direct-fired regenerative drying system according to claim 1, wherein the liquid outlet end of the waste heat recoverer is communicated with the liquid inlet end of the reheater through a first liquid pipe, the liquid outlet end of the reheater is communicated with the liquid inlet end of the waste heat recoverer through a second liquid pipe, and a second electromagnetic valve, a water pump and a flow limiting valve are sequentially arranged on the first liquid pipe along the water flow direction.
5. The direct-fired regenerative drying system according to claim 4, further comprising a liquid storage tank, wherein a liquid inlet end of the liquid storage tank is communicated with the first liquid conveying pipe through a third liquid conveying pipe, a liquid inlet end of the third liquid conveying pipe is located between a liquid outlet end of the waste heat recoverer and the second electromagnetic valve, a third electromagnetic valve is arranged on the third liquid conveying pipe, a liquid outlet end of the liquid storage tank is communicated with the first liquid conveying pipe through a fourth liquid conveying pipe, a liquid outlet end of the fourth liquid conveying pipe is located between the second electromagnetic valve and the water pump, and a fourth electromagnetic valve is arranged on the fourth liquid conveying pipe.
6. The direct-combustion type regenerative drying system according to claim 1, wherein the burner comprises an igniter and a gas nozzle, the gas nozzle is connected with a gas supply device through a gas channel, a first electromagnetic valve is arranged on the gas channel, and the igniter is arranged at a nozzle of the gas nozzle.
7. A direct-fired regenerative drying system according to claim 1, wherein said drying material is a honeycomb paper fiber material having lithium bromide uniformly disposed thereon.
8. The direct-fired regenerative drying system of claim 5 wherein said storage tank contains antifreeze fluid.
9. Use of a direct-fired regenerative drying system according to any of claims 1 to 8, characterized in that it comprises the following steps:
starting a first fan, enabling fresh air to enter a surface cooler for cooling, enabling cooled clean air to enter a drying area of a dryer for drying and dehumidifying, enabling dried air after drying and dehumidifying to enter a reheater for heating, and discharging heated dried air;
starting a second fan, heating fresh air to a preset temperature through a combustor, then entering a regeneration area of the dryer, evaporating and taking out moisture of a drying material in the regeneration area, entering hot air subjected to moisture absorption into a waste heat recoverer, exchanging heat with liquid in the waste heat recoverer, and discharging warm air after heat exchange is finished;
and after the liquid in the reheater finishes heating the drying air, the liquid flows back to the waste heat recoverer to form a cycle.
10. The use method of the direct-fired regenerative drying system according to claim 9, wherein the liquid outlet end of the waste heat recoverer is communicated with the liquid inlet end of the reheater through a first liquid pipe, the liquid outlet end of the reheater is communicated with the liquid inlet end of the waste heat recoverer through a second liquid pipe, and a second electromagnetic valve, a water pump and a flow limiting valve are sequentially arranged on the first liquid pipe along the water flow direction;
the direct-fired regenerative drying system further comprises a liquid storage tank, a liquid inlet end of the liquid storage tank is communicated with the first liquid storage pipe through a third liquid storage pipe, a liquid inlet end of the third liquid storage pipe is located between a liquid outlet end of the waste heat recoverer and the second electromagnetic valve, a third electromagnetic valve is arranged on the third liquid storage pipe, a liquid outlet end of the liquid storage tank is communicated with the first liquid storage pipe through a fourth liquid storage pipe, a liquid outlet end of the fourth liquid storage pipe is located between the second electromagnetic valve and the water pump, and a fourth electromagnetic valve is arranged on the fourth liquid storage pipe;
when in work, the method comprises the following steps:
step one, closing a second electromagnetic valve, opening a third electromagnetic valve, a fourth electromagnetic valve and a flow limiting valve, enabling liquid in a liquid storage tank to enter a water pump through a fourth liquid conveying pipe, enabling the liquid to enter a reheater through a first liquid conveying pipe and the flow limiting valve, heating the dried and dehumidified dry air, enabling the liquid to enter a waste heat recoverer through a second liquid conveying pipe after the liquid is heated in the reheater, exchanging heat with the hot air after moisture absorption, and enabling the liquid to flow back to the liquid storage tank through the first liquid conveying pipe and the third liquid conveying pipe after the liquid exchanges heat in the waste heat recoverer to form circulation;
and step two, after the liquid exchanges heat stably between the reheater and the waste heat recoverer, the second electromagnetic valve is opened, the third electromagnetic valve and the fourth electromagnetic valve are closed, the liquid enters the water pump through the first liquid pipe after the heat exchange is completed in the waste heat recoverer, enters the reheater through the flow limiting valve to heat the dried and dehumidified dry air, and the liquid flows back to the waste heat recoverer through the second liquid pipe after the heating is completed in the reheater to form circulation.
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| CN202010327540.6A CN111457615A (en) | 2020-04-23 | 2020-04-23 | Direct-fired regenerative drying system and using method thereof |
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| CN202010327540.6A CN111457615A (en) | 2020-04-23 | 2020-04-23 | Direct-fired regenerative drying system and using method thereof |
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Cited By (1)
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| CN114322122A (en) * | 2021-12-21 | 2022-04-12 | 珠海格力电器股份有限公司 | Rotary dehumidifier, heat exchange system and control method |
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