CN115560557A - Hot air drying system - Google Patents
Hot air drying system Download PDFInfo
- Publication number
- CN115560557A CN115560557A CN202211221928.3A CN202211221928A CN115560557A CN 115560557 A CN115560557 A CN 115560557A CN 202211221928 A CN202211221928 A CN 202211221928A CN 115560557 A CN115560557 A CN 115560557A
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- Prior art keywords
- pipeline
- sub
- drying chamber
- air
- drying
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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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
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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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
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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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
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
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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
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
- F26B21/024—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by using movable fan units
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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
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- 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
- F26B25/001—Handling, e.g. loading or unloading arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a hot air drying system which comprises a drying chamber, a return air duct and a heat pump unit, wherein a first sub-drying chamber and a second sub-drying chamber are arranged in the drying chamber, the heat pump unit comprises a first-stage condenser, a second-stage condenser and an evaporator, the return air duct comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline penetrates through the first-stage condenser and then is communicated with the first sub-drying chamber, one end of the second pipeline is communicated with the first sub-drying chamber, the other end of the second pipeline penetrates through the second-stage condenser and is communicated with the second sub-drying chamber, one end of the third pipeline is communicated with the second sub-drying chamber, the other end of the third pipeline penetrates through the evaporator and is communicated with the first pipeline, and fans are arranged in the first sub-drying chamber and the second sub-drying chamber. According to the hot air drying system, the first-stage condenser and the second-stage condenser are adopted for heating air back and forth, materials in different drying stages can be dried in the two sub-drying chambers, the drying efficiency of the hot air drying system is improved, and meanwhile energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of hot air drying, in particular to a hot air drying system.
Background
The hot air drying technology is a common drying technology widely applied to various fields of agriculture, engineering, chemistry, medicine and the like. The hot air drying technology is to use hot air as a drying medium to perform heat and moisture exchange with materials in a natural or forced convection circulation mode. In the hot air drying process, moisture on the surface of the material is diffused to the environment through the air film on the surface, meanwhile, due to the result of vaporization of the moisture on the surface of the material, moisture gradient difference is generated between the inside and the surface of the material, and the moisture in the inside of the material can be diffused to the surface in a vapor state or liquid state mode so as to be diffused to the environment, and the purpose of reducing the moisture content of the material is achieved.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a hot air drying system provided in the prior art, and the hot air drying system includes: the system comprises a drying chamber 01, an air return duct 02, a fan set 03, an outer fresh air valve 04, a dehumidification air valve 05, an air supply mixing chamber 06, a heat pump set 07, an exhaust air valve 08, an inner fresh air valve 09, a heat pump set air inlet valve 10 and a temperature and humidity sensor 11. When the hot air drying system is operated in the closed drying mode, the arrows in the figure represent the air flow direction. When the hot air drying system 00 is in operation, the air flow needs to return to the drying chamber 01 again through the return air duct 02. Because there are a plurality of right angle bends in the return air duct 02, consequently the air current has great resistance in the in-process of return air duct 02 of flowing through, leads to this hot air drying system 00's fan efficiency lower, and then leads to this hot air drying system's energy consumption great. In addition, since the common hot air drying process of the materials is a sectional type drying process, the existing hot air drying system can only set one drying condition in the same time period, so that the energy consumption of the hot air drying system is increased, and the efficiency is lower.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects that the energy consumption of a hot air drying system is increased and the efficiency is low because the existing hot air drying system can only set one drying condition in the same time period in the prior art, the invention provides the hot air drying system.
The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a hot air drying system, includes drying chamber, return air wind channel and heat pump set, be equipped with first sub-drying chamber and the sub-drying chamber of second in the drying chamber, heat pump set includes first order condenser, second level condenser and evaporimeter, the return air wind channel includes first pipeline, second pipeline and third pipeline, first pipeline passes behind the first order condenser with first sub-drying chamber intercommunication, second pipeline one end and first sub-drying chamber intercommunication, the other end pass second level condenser and the sub-drying chamber intercommunication of second, third pipeline one end and the sub-drying chamber intercommunication of second, the other end passes evaporimeter and first pipeline intercommunication, be equipped with the fan in first sub-drying chamber and the sub-drying chamber of second, first pipeline, second pipeline and third pipeline corner are equipped with air flow guiding device.
Further, a material conveying device is arranged between the first sub-drying chamber and the second sub-drying chamber. The material conveying device is used for conveying materials between the first sub drying chamber and the second sub drying chamber. Therefore, after the drying process of the stage is completed, the materials in the first sub-drying chamber can be conveyed to the second sub-drying chamber through the material conveying device, so as to complete the next stage of drying process.
The drying device further comprises a first air inlet pipeline and a second air inlet pipeline, a dehumidification air valve is arranged on a pipeline between the second sub-drying chamber and the evaporator through the third pipeline, the first air inlet pipeline and the second air inlet pipeline are respectively communicated with third pipelines on two sides of the dehumidification air valve, an outer fresh air valve is arranged on the first air inlet pipeline, a heat pump unit air inlet air valve is arranged on the second air inlet pipeline, an air supply mixing chamber is arranged between the first pipeline and the third pipeline, a pipeline is connected between the first air inlet pipeline and the air supply mixing chamber, an inner fresh air valve is arranged at one end, close to the air supply mixing chamber, of the third pipeline, and an air exhaust air valve is further arranged on the part, penetrating through the evaporator, of the third pipeline.
Furthermore, temperature and humidity sensors used for measuring the temperature and the humidity of the drying chamber are arranged in the first sub-drying chamber and the second sub-drying chamber.
Further, the airflow guiding device is a centrifugal fan or an airflow guiding plate.
The invention has the beneficial effects that: according to the hot air drying system, the first-stage condenser and the second-stage condenser are adopted for heating the air back and forth, materials in different drying stages can be dried in the two sub-drying chambers, the drying efficiency of the hot air drying system is improved, and meanwhile, the energy consumption is reduced; and, because at every corner in return air wind channel, the equipartition has been provided with airflow guiding device, consequently, when the corner of each pipeline is flowed through to the air current, the air current can be through the comparatively convenient change flow direction of airflow guiding device, consequently, the resistance of air current in the corner of each pipeline of flowing through reduces to make the fan efficiency among this hot air drying system improve, and then reduce this hot air drying system's energy consumption.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic diagram of a prior art hot air drying system;
FIG. 2 is a schematic structural diagram according to the first embodiment;
fig. 3 is a schematic structural diagram of the second embodiment.
In the figure: 1. the drying room, 101, a first sub-drying room, 102, a second sub-drying room, 103, a material conveying device, 104, a temperature and humidity sensor, 2, an air return duct, 201, a first pipeline, 202, a second pipeline, 203, a third pipeline, 3, a fan, 4, a heat pump unit, 401, a first-stage condenser, 402, a second-stage condenser, 403, an evaporator, 5, an airflow guiding device, 6, an outer fresh air valve, 7, a dehumidification air valve, 8, an exhaust air valve, 9, an inner fresh air valve, 10, a heat pump unit air inlet valve, 11, a first air inlet pipeline, 12, a second air inlet pipeline, 13 and an air supply mixing room.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and only illustrates the basic structure of the present invention in a schematic manner, and therefore it only shows the constitution related to the present invention.
The first embodiment is as follows:
as shown in fig. 2, the hot air drying system of the present invention includes a drying chamber 1, a return air duct 2 and a heat pump unit 4, a first sub-drying chamber 101 and a second sub-drying chamber 102 are disposed in the drying chamber 1, the heat pump unit 4 includes a first-stage condenser 401, a second-stage condenser 402 and an evaporator 403, the return air duct 2 includes a first duct 201, a second duct 202 and a third duct 203, the first duct 201 passes through the first-stage condenser 401 and then communicates with the first sub-drying chamber 101, one end of the second duct 202 communicates with the first sub-drying chamber 101, the other end of the second duct passes through the second-stage condenser 402 and communicates with the second sub-drying chamber 102, one end of the third duct 203 communicates with the second sub-drying chamber 102, the other end of the third duct passes through the evaporator 403 and communicates with the first duct 201, fans 3 are disposed in the first sub-drying chamber 101 and the second sub-drying chamber 102, and airflow guides 5 are disposed in corners of the first duct 201, the second duct 202 and the third duct 203.
A material conveying device 103 is arranged between the first sub drying chamber 101 and the second sub drying chamber 102.
Temperature and humidity sensors 104 for measuring the temperature and humidity of the drying chamber 1 are arranged in the first sub-drying chamber 101 and the second sub-drying chamber 102.
The airflow guiding device 5 is a centrifugal fan or an airflow guiding plate.
The working principle is as follows:
when the hot air drying system works, air is heated by the first-stage condenser 401 from the first pipeline 201, then is sent into the first sub-drying chamber 101 by the fan 3, and performs heat and mass exchange with the material in the first sub-drying chamber 101, the air with the increased moisture content flows into the second pipeline 202, and then is heated again by the second-stage condenser 402, and then is sent into the second sub-drying chamber 102 by the fan 3, and performs heat and mass exchange with the material in the second sub-drying chamber 102. The hot and humid air flows through the evaporator 403 via the third pipeline 203 for condensation and dehumidification, enters the first pipeline 201 from the third pipeline 203 after the moisture content is reduced, is reheated by the heat pump unit 4, and enters the drying chamber 1 again for drying. Because the air is heated by the two-stage condenser in front and at the back, the materials in different drying stages can be dried in the two sub-drying chambers, the drying efficiency of the hot air drying system is improved, and meanwhile, the energy consumption is reduced.
Example two:
as shown in fig. 3, the difference between the first embodiment and the first embodiment is that the drying apparatus further includes a first air inlet duct 11 and a second air inlet duct 12, the third duct 203 is provided with a dehumidification air valve 7 on a duct between the second sub-drying chamber 102 and the evaporator 403, the first air inlet duct 11 and the second air inlet duct 12 are respectively communicated with third ducts 203 on two sides of the dehumidification air valve 7, the first air inlet duct 11 is provided with an external fresh air valve 6, the second air inlet duct 12 is provided with a heat pump unit air inlet valve 10, an air supply mixing chamber 13 is provided between the first duct 201 and the third duct 203, the first air inlet duct 11 and the air supply mixing chamber 13 are connected with a duct, one end of the third duct 203 close to the air supply mixing chamber 13 is provided with an internal fresh air valve 9, and the third duct 203 passes through a duct portion of the evaporator 403 and is further provided with an air exhaust air valve 8.
The working principle is as follows:
the hot air drying system can switch different operation modes according to actual production needs.
When the temperature and humidity sensor 104 senses that the temperature in the drying chamber 1 is lower than a set temperature, the heat pump unit 4 is started to operate, and when the temperature in the drying chamber 1 is higher than the set temperature, the heat pump unit 4 is stopped; when the temperature and humidity sensor 104 senses that the relative humidity in the drying chamber 1 is lower than the set relative humidity, the external fresh air valve 6, the dehumidification air valve 7, the exhaust air valve 8, the internal fresh air valve 9 and the heat pump unit air inlet air valve 10 are all closed, air in the drying chamber 1 is heated by the heat pump unit 4 and then enters the drying chamber 1 to perform heat and humidity exchange with drying materials, the air returns to the heat pump unit 4 through the air return duct 2 after the temperature is reduced and then enters the drying chamber 1 again to be dried, and air circulation in the drying chamber 1 is completed.
When the hot air drying system operates in a closed drying mode, the outer fresh air valve 6, the exhaust air valve 8 and the heat pump unit air inlet valve are closed, and the inner fresh air valve 9 is opened. After flowing in from outer fresh air valve 6, the outside air flows through heat pump unit 4 and is sent into drying chamber 1 by fan 3, and carries out heat and mass exchange with the material in drying chamber 1. The air with the increased moisture content flows into the third duct 203, a part of the air flows through the evaporator 403 from the dehumidification air valve 7, and the other part of the air directly serves as return air from the first air intake duct 11. The air flow passes through the evaporator 403 for condensation and dehumidification, and after the moisture content is reduced, the air flow is used as fresh air to reenter the air supply mixing chamber 13 from the internal fresh air valve 9 to be mixed with return air, and then the air flow is reheated by the heat pump unit 4 and reenters the drying chamber 1 for drying.
When the system is in an open drying mode, the external fresh air valve 6, the exhaust air valve 8 and the heat pump unit air inlet valve are opened, the internal fresh air valve 9 is closed, and external air flows into the external fresh air valve 6 and then is mixed with part of return air flow in the third pipeline 203 in the air supply mixing chamber 13 and then flows into the drying chamber 1 after being heated by the heat pump unit 4. The other part of the air flow in the third pipeline 203 is introduced into the heat pump unit 4 from the dehumidification air valve 7, and is discharged from the exhaust air valve 8 after the waste heat is discharged.
Directions and references (e.g., up, down, left, right, etc.) may be used in the present disclosure only to aid in the description of features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. A hot air drying system is characterized in that: including drying chamber (1), return air wind channel (2) and heat pump set (4), be equipped with first sub-drying chamber (101) and second sub-drying chamber (102) in drying chamber (1), heat pump set (4) include first level condenser (401), second level condenser (402) and evaporimeter (403), return air wind channel (2) are including first pipeline (201), second pipeline (202) and third pipeline (203), first pipeline (201) pass first level condenser (401) back and first sub-drying chamber (101) intercommunication, second pipeline (202) one end and first sub-drying chamber (101) intercommunication, the other end passes second level condenser (402) and second sub-drying chamber (102) intercommunication, third pipeline (203) one end and second sub-drying chamber (102) intercommunication, the other end passes evaporimeter (403) and first pipeline (201) intercommunication, be equipped with fan (3) in first sub-drying chamber (101) and the second sub-drying chamber (102), first pipeline (203), second pipeline (202) and corner device (5) are equipped with air current guiding device (201).
2. The hot air drying system as claimed in claim 1, wherein: and a material conveying device (103) is arranged between the first sub drying chamber (101) and the second sub drying chamber (102).
3. A hot air drying system according to claim 1 or 2, wherein: still include first air inlet pipeline (11) and second air inlet pipeline (12), be equipped with dehumidification air valve (7) on the pipeline that third pipeline (203) were located between second sub-drying chamber (102) and evaporimeter (403), first air inlet pipeline (11) and second air inlet pipeline (12) communicate with third pipeline (203) of dehumidification air valve (7) both sides respectively, be equipped with outer new trend air valve (6) on first air inlet pipeline (11), be equipped with heat pump set air inlet valve (10) on second air inlet pipeline (12), be equipped with air supply mixing chamber (13) between first pipeline (201) and third pipeline (203), be connected with the pipeline of airing exhaust between first air inlet pipeline (11) and air supply mixing chamber (13), third pipeline (203) are close to the one end of air supply mixing chamber (13) and are equipped with interior new trend air valve (9), third pipeline (203) pass still are equipped with air valve (8) on the pipeline portion of evaporimeter (403).
4. A hot air drying system as claimed in claim 3, wherein: temperature and humidity sensors (104) used for measuring the temperature and the humidity of the drying chamber (1) are arranged in the first sub-drying chamber (101) and the second sub-drying chamber (102).
5. A hot air drying system as claimed in claim 3, wherein: the airflow guiding device (5) is a centrifugal fan or an airflow guiding plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211221928.3A CN115560557A (en) | 2022-10-08 | 2022-10-08 | Hot air drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211221928.3A CN115560557A (en) | 2022-10-08 | 2022-10-08 | Hot air drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115560557A true CN115560557A (en) | 2023-01-03 |
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ID=84745140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211221928.3A Pending CN115560557A (en) | 2022-10-08 | 2022-10-08 | Hot air drying system |
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|---|---|
| CN (1) | CN115560557A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216245A (en) * | 2007-12-28 | 2008-07-09 | 天津大学 | Heat pump drier |
| CN101504247A (en) * | 2009-02-26 | 2009-08-12 | 东莞市康源节能科技有限公司 | Air source high-temperature heat pump dehumidification equipment |
| KR20100032220A (en) * | 2008-09-17 | 2010-03-25 | 문감사 | Dryer using heat pump |
| KR20110068616A (en) * | 2009-12-16 | 2011-06-22 | (주)에프티이앤이 | Drying device |
| CN102322735A (en) * | 2011-09-23 | 2012-01-18 | 宁建付 | Energy-saving heat pump dehumidification drying device |
| CN203146437U (en) * | 2012-12-31 | 2013-08-21 | 江苏东泽环保科技有限公司 | Rectifier grid |
| CN203595372U (en) * | 2013-12-04 | 2014-05-14 | 烟台大学 | Novel heat pump drying device |
| CN105029655A (en) * | 2015-08-03 | 2015-11-11 | 天津市傲绿农副产品集团股份有限公司 | Energy-saving type garden staff heat pump drying device |
| CN108917376A (en) * | 2018-08-01 | 2018-11-30 | 河南佰衡节能科技股份有限公司 | Dehumidification type recuperation of heat closed circulation heat pump drying system under high dirt environment |
| CN110500876A (en) * | 2019-09-05 | 2019-11-26 | 天津商业大学 | A kind of more complete chiller-heat pump drying systems in condensers centre of multi-stage compression |
| CN114560616A (en) * | 2022-03-17 | 2022-05-31 | 江苏博一环保科技有限公司 | Heat pump type belt low-temperature sludge drying machine |
-
2022
- 2022-10-08 CN CN202211221928.3A patent/CN115560557A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216245A (en) * | 2007-12-28 | 2008-07-09 | 天津大学 | Heat pump drier |
| KR20100032220A (en) * | 2008-09-17 | 2010-03-25 | 문감사 | Dryer using heat pump |
| CN101504247A (en) * | 2009-02-26 | 2009-08-12 | 东莞市康源节能科技有限公司 | Air source high-temperature heat pump dehumidification equipment |
| KR20110068616A (en) * | 2009-12-16 | 2011-06-22 | (주)에프티이앤이 | Drying device |
| CN102322735A (en) * | 2011-09-23 | 2012-01-18 | 宁建付 | Energy-saving heat pump dehumidification drying device |
| CN203146437U (en) * | 2012-12-31 | 2013-08-21 | 江苏东泽环保科技有限公司 | Rectifier grid |
| CN203595372U (en) * | 2013-12-04 | 2014-05-14 | 烟台大学 | Novel heat pump drying device |
| CN105029655A (en) * | 2015-08-03 | 2015-11-11 | 天津市傲绿农副产品集团股份有限公司 | Energy-saving type garden staff heat pump drying device |
| CN108917376A (en) * | 2018-08-01 | 2018-11-30 | 河南佰衡节能科技股份有限公司 | Dehumidification type recuperation of heat closed circulation heat pump drying system under high dirt environment |
| CN110500876A (en) * | 2019-09-05 | 2019-11-26 | 天津商业大学 | A kind of more complete chiller-heat pump drying systems in condensers centre of multi-stage compression |
| CN114560616A (en) * | 2022-03-17 | 2022-05-31 | 江苏博一环保科技有限公司 | Heat pump type belt low-temperature sludge drying machine |
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