CN211451445U - Hot air drying system - Google Patents
Hot air drying system Download PDFInfo
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- CN211451445U CN211451445U CN201921860684.7U CN201921860684U CN211451445U CN 211451445 U CN211451445 U CN 211451445U CN 201921860684 U CN201921860684 U CN 201921860684U CN 211451445 U CN211451445 U CN 211451445U
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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
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- 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]
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Abstract
The utility model discloses a hot air drying system, including two at least drying unit, each drying unit all arranges in proper order from the front to the back, and each drying unit all includes frame and drying cabinet, its characterized in that: the hot air drying system also comprises an air supplementing fan and an air exhausting fan; each drying unit is also provided with a hot air device, an air supplementing pipe and an air exhaust pipe, the hot air device, the air supplementing pipe and the air exhaust pipe are respectively arranged on the corresponding rack, the air supplementing pipes and the air exhaust pipes are arranged along the front and back directions, and the air supplementing pipes on the adjacent drying units are communicated; the air supply fan is arranged on the last drying unit, and the air exhaust fan is arranged on the first drying unit. The hot air drying system not only can realize the reutilization of the waste gas and achieve the purposes of energy conservation and emission reduction, but also can ensure that the concentration of VOCs in the waste gas entering the drying box is below a safety limit value, and can improve the use safety.
Description
Technical Field
The utility model relates to a hot air drying technical field, in particular to hot air drying system.
Background
The hot air drying system is a main energy consumption unit of production equipment for printing, compounding, coating, spraying, paint spraying and the like, and is also a main emission source of waste gas, and the efficiency of the hot air drying system is a core parameter of a performance evaluation index of the production equipment.
The conventional hot air drying apparatus has the following disadvantages: the drying cabinet has the unorganized emission of a certain amount of waste gas in the course of the work, and these waste gases that discharge are all high temperature, the gas of high VOC concentration, and the heat that can take out drying equipment causes the increase of energy consumption, and these gases disperse in the workshop simultaneously, and the purification treatment is difficult, can air pollution, influences workman's health. Therefore there is hot air drying equipment in the existing market, can be at the during operation and will directly utilize the intake stack to introduce to be located the drying cabinet of next stage from exhaust waste gas in the drying cabinet to the realization is favorable to reducing the emission of waste gas to the reuse of waste gas, improves VOCs's in the waste gas concentration. However, in such a hot air drying system, the concentration of VOCs in the exhaust gas in the drying box at the downstream often exceeds a safety limit, and if the exhaust gas is not evacuated in time and enters the drying box, accidents such as fire and explosion may occur, and the safety of use is not high.
Disclosure of Invention
The utility model aims to solve the technical problem that a hot air drying system is provided, this kind of hot air drying system not only can realize reaching energy-conservation, emission reduction's purpose to the reuse of waste gas, can ensure moreover that the VOCs concentration in the waste gas that gets into the drying cabinet is below the safety limit value, can improve the security of using.
In order to solve the technical problems, the technical scheme is as follows:
the utility model provides a hot air drying system, includes two at least drying unit, and each drying unit is all arranged from preceding to back in proper order, and each drying unit all includes frame and drying cabinet, its characterized in that: the hot air drying system also comprises an air supplementing fan and an air exhausting fan; each drying unit is also provided with a hot air device, an air supplementing pipe and an air exhaust pipe, the hot air device, the air supplementing pipe and the air exhaust pipe are respectively arranged on the corresponding rack, the air supplementing pipe and the air exhaust pipe are arranged along the front and back direction, the air supplementing pipes on the adjacent drying units are communicated, the side wall of each air supplementing pipe is provided with a first air inlet, and each first air inlet is provided with an air inlet valve; the air exhaust pipes on the adjacent drying units are communicated, the side wall of each air exhaust pipe is provided with a first air inlet and a first air outlet, the first air inlet is positioned in front of the first air outlet along the blowing direction of the air, the first air inlet is communicated with the corresponding cavity of the drying box through a corresponding hot air device, and the first air outlet is communicated with the corresponding cavity of the drying box; the air supplementing fan is arranged on the last drying unit, an air inlet of the air supplementing fan is communicated with an air outlet of an air supplementing air pipe of the drying unit, and an air outlet of the air supplementing fan is communicated with an opening at the front end of an air exhaust air pipe of the drying unit; the air exhaust fan is arranged on the first drying unit and is communicated with the rear end opening of the air exhaust pipe of the drying unit.
The front and rear directions are determined according to the wind flow direction, and the position where the wind passes first is the front position and the position where the wind passes later is the rear position.
When the hot air drying system works, the air supplementing fan, the air exhaust fan and each hot air device are started, and each hot air device forms negative pressure at the air outlet of each air exhaust air pipe by exhausting air at the air outlet of each air exhaust air pipe; under the action of the air supplementing fan and the air exhausting fan, fresh air continuously enters the air supplementing air pipes through air inlet valves on the air supplementing air pipes and flows from front to back along the air supplementing air pipes and the air exhausting air pipes, when the fresh air passes through first air inlet openings of the air exhausting air pipes, the fresh air enters the hot air device under the action of negative pressure and is heated to a proper temperature, hot air is formed and enters a drying box of the last drying unit, waste gas generated after the hot air contacts with a base material enters the air exhausting air pipes through first air outlets and is mixed with the fresh air in the air exhausting air pipes, the waste gas enters the next drying box from the next first air inlet openings, and the waste gas is discharged through the air exhausting fan after the process is repeated. Through this kind of setting, can realize that the partial gas that the department flowed into in the drying cabinet of rear side is the drying cabinet combustion gas who is in the front side, thereby realize recycling of waste gas, be favorable to reducing the emission of waste gas, VOCs's concentration in the improvement waste gas, and switch through control air inlet valve, can control the amount of wind that gets into the new trend in the tonifying wind tuber pipe, thereby when new trend and waste gas mix, through the mode of control new trend amount of wind, VOCs's concentration is controlled in the waste gas, ensure that the VOCs concentration in the waste gas that gets into the drying cabinet is below the safety limit, the security of using is improved.
In the preferred scheme, each hot air device all includes air exhauster, first heating member and second heating member, and air exhauster, first heating member and second heating member are all installed and are corresponded in the frame, first air inlet loops through the air intake intercommunication of first heating member, second heating member and air exhauster, the air outlet of air exhauster with the cavity intercommunication of drying cabinet. During operation, the air exhauster loops through first heating member, the second heating member is bled and is formed the negative pressure in first air inlet department, and the gas in the tuber pipe of airing exhaust gets into first heating member through first air inlet, heats the intensification by first heating member, carries out the heating intensification once more in getting into the second heating member again, and the gas after the heating is sent into the drying cabinet by the air exhauster at last, through carrying out the second grade heating to gas, can ensure that the gas that sends into in the drying cabinet reaches suitable temperature value.
In a further preferred scheme, the first heating element comprises a heating box body and at least two heating pipes, and the heating box body is provided with an inner cavity; each heating pipe is all crooked to be set up, and each heating pipe is in proper order the looks dislocation and the installation that is parallel to each other in the inner chamber, along each the circumference of heating pipe, all twine many circles of fin on the heating pipe from head end to terminal surface.
In a further preferred embodiment, each of the heating pipes is bent into a W shape.
In a further preferable scheme, the heat radiating fin is formed by welding a first metal sheet and a second metal sheet together, a plurality of first cambered convex parts protruding outwards are arranged on the first metal sheet, a plurality of second cambered convex parts protruding outwards are arranged on the second metal sheet, and the first cambered convex parts correspond to the second cambered convex parts one to one.
In a further preferred embodiment, the heat dissipation fins are closely arranged among the circles.
In a further preferred embodiment, the number of the heating pipes is four.
In a further preferred embodiment, the second heating member is a heat exchanger.
The beneficial effects of the utility model reside in that: the hot air drying system not only can realize the reutilization of waste gas and achieve the purposes of energy saving and emission reduction, but also can ensure that the concentration of VOCs in the waste gas entering the drying box is below a safety limit value and improve the use safety by matching the air supplementing fan, the air exhausting fan, each drying box, each hot air device, each air supplementing air pipe, each air exhausting air pipe and each air inlet valve.
Drawings
Fig. 1 is a schematic structural diagram of a hot air drying system in an embodiment of the present invention;
FIG. 2 is a schematic structural view of the embodiment of the present invention when the air exhaust duct, the hot air device and the drying box are communicated;
fig. 3 is a schematic structural view of a first heating element according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a heat sink in an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
the hot air drying system shown in fig. 1-4 includes an air supply fan 1, an air exhaust fan 2 and a plurality of drying units 3, each drying unit 3 is sequentially arranged from front to back, each drying unit 3 includes a rack 301, a drying box 302, a hot air device 303, an air supply pipe 304 and an air exhaust pipe 305, the hot air device 303, the air supply pipe 304 and the air exhaust pipe 305 are respectively installed on the corresponding rack 301, the air supply pipe 304 and the air exhaust pipe 305 are both arranged along the front-back direction, the air supply pipes 304 on the adjacent drying units 3 are communicated, the side wall of each air supply pipe 304 is provided with a first air inlet 3041, and each first air inlet 3041 is provided with an air inlet valve; the air exhaust air pipes 305 on the adjacent drying units 3 are communicated, the side wall of each air exhaust air pipe 305 is provided with a first air inlet 3051 and a first air outlet 3052, the first air inlet 3051 is positioned in front of the first air outlet 3052 along the blowing direction of the air, the first air inlet 3051 is communicated with the cavity of the corresponding drying box 302 through the corresponding hot air device 303, and the first air outlet 3052 is communicated with the cavity of the corresponding drying box 302; the air supply fan 1 is arranged on the last drying unit 3, an air inlet of the air supply fan 1 is communicated with an air outlet of an air supply pipe 304 of the drying unit 3, and an air outlet of the air supply fan 1 is communicated with an opening at the front end of an air exhaust pipe 305 of the drying unit 3; the exhaust fan 2 is provided in the first drying unit 3 and communicates with the rear end opening of the exhaust duct 305 of the drying unit 3.
The front and rear directions are determined according to the wind flow direction, and the position where the wind passes first is the front position and the position where the wind passes later is the rear position.
When the hot air drying system works, the air supply fan 1, the air exhaust fan 2 and each hot air device 303 are started, and each hot air device 303 forms negative pressure at the air outlet of each air exhaust pipe 305 by exhausting air at the air outlet of the air exhaust pipe 305; under the action of the air supply fan 1 and the air exhaust fan 2, fresh air continuously enters the air supply air pipes 304 through air inlet valves on the air supply air pipes 304 and flows from front to back along the air supply air pipes 304 and the air exhaust air pipes 305, when the fresh air passes through first air inlets 3051 of the air exhaust air pipes 305, the fresh air enters the hot air device 303 under the action of negative pressure and is heated to a proper temperature, hot air is formed and enters the drying box 302 of the last drying unit 3, waste gas generated after the hot air contacts with a substrate enters the air exhaust air pipes 305 through first air outlets 3052 and is mixed with the fresh air in the air exhaust air pipes 305, then enters the next drying box 302 from the next first air inlet 3051, and finally the fresh air is exhausted through the air exhaust fan 2 by repeating the process. Through this kind of setting, can realize that the partial gas that the department flowed into in the drying cabinet 302 of rear side is the combustion gas in the drying cabinet 302 that is in the front side, thereby realize recycling of waste gas, be favorable to reducing the emission of waste gas, improve VOCs's concentration in the waste gas, and switch through control air inlet valve, can control the amount of wind that gets into new trend in the tonifying wind tuber pipe 304, thereby when new trend and waste gas mix mutually, through the mode of control new trend amount of wind, control VOCs's concentration in the waste gas, ensure that the VOCs concentration in the waste gas that gets into drying cabinet 302 is below the safety limit, the security of using is improved.
Each hot air device 303 comprises an exhaust fan 3031, a first heating element 3032 and a second heating element 3033, the exhaust fan 3031, the first heating element 3032 and the second heating element 3033 are all mounted on the corresponding machine frame 301, a first air inlet 3051 is communicated with an air inlet of the exhaust fan 3031 sequentially through the first heating element 3032 and the second heating element 3033, and an air outlet of the exhaust fan 3031 is communicated with the cavity of the drying box 302; the first heating element 3032 comprises a heating box 30321 and four heating pipes 30322, wherein the heating box 30321 is provided with an inner cavity 303211; each heating pipe 30322 is bent into a W shape, each heating pipe 30322 is sequentially staggered and arranged in the inner cavity 303211 in parallel, a plurality of circles of cooling fins 4 are wound on the outer surface of each heating pipe 30322 from the head end to the tail end along the circumferential direction of each heating pipe 30322, the cooling fins 4 are tightly arranged, each cooling fin 4 is formed by welding a first metal sheet 401 and a second metal sheet 402 together, a plurality of outwards convex first cambered convex parts 4011 are arranged on the first metal sheet 401, a plurality of outwards convex second cambered convex parts 4021 are arranged on the second metal sheet 402, and the first cambered convex parts 4011 correspond to the second cambered convex parts 4021 one to one; the second heating member 3033 is a heat exchanger. During work, the exhaust fan 3031 sequentially exhausts air through the first heating element 3032 and the second heating element 3033 to form negative pressure at the first air inlet 3051, air in the exhaust air pipe 305 enters the first heating element 3032 through the first air inlet 3051, is heated and warmed by the first heating element 3032 and then enters the second heating element 3033 to be heated and warmed again, and the heated air is finally sent into the drying box 302 through the exhaust fan 3031, so that the air sent into the drying box 302 can reach an appropriate temperature value through secondary heating of the air.
Claims (8)
1. The utility model provides a hot air drying system, includes two at least drying unit, and each drying unit is all arranged from preceding to back in proper order, and each drying unit all includes frame and drying cabinet, its characterized in that: the hot air drying system also comprises an air supplementing fan and an air exhausting fan; each drying unit is also provided with a hot air device, an air supplementing pipe and an air exhaust pipe, the hot air device, the air supplementing pipe and the air exhaust pipe are respectively arranged on the corresponding rack, the air supplementing pipe and the air exhaust pipe are arranged along the front and back direction, the air supplementing pipes on the adjacent drying units are communicated, the side wall of each air supplementing pipe is provided with a first air inlet, and each first air inlet is provided with an air inlet valve; the air exhaust pipes on the adjacent drying units are communicated, the side wall of each air exhaust pipe is provided with a first air inlet and a first air outlet, the first air inlet is positioned in front of the first air outlet along the blowing direction of the air, the first air inlet is communicated with the corresponding cavity of the drying box through a corresponding hot air device, and the first air outlet is communicated with the corresponding cavity of the drying box; the air supplementing fan is arranged on the last drying unit, an air inlet of the air supplementing fan is communicated with an air outlet of an air supplementing air pipe of the drying unit, and an air outlet of the air supplementing fan is communicated with an opening at the front end of an air exhaust air pipe of the drying unit; the air exhaust fan is arranged on the first drying unit and is communicated with the rear end opening of the air exhaust pipe of the drying unit.
2. The hot air drying system as claimed in claim 1, wherein: each hot air device all includes air exhauster, first heating member and second heating member, and air exhauster, first heating member and second heating member are all installed and are corresponded in the frame, first air inlet loops through the air intake intercommunication of first heating member, second heating member and air exhauster, the air outlet of air exhauster with the cavity intercommunication of drying cabinet.
3. The hot air drying system as claimed in claim 2, wherein: the first heating element comprises a heating box body and at least two heating pipes, and the heating box body is provided with an inner cavity; each heating pipe is all crooked to be set up, and each heating pipe is in proper order the looks dislocation and the installation that is parallel to each other in the inner chamber, along each the circumference of heating pipe, all twine many circles of fin on the heating pipe from head end to terminal surface.
4. A hot air drying system as claimed in claim 3, wherein: each of the heating pipes is bent in a W-shape.
5. A hot air drying system as claimed in claim 3, wherein: the radiating fin is formed by welding a first metal sheet and a second metal sheet together, a plurality of first cambered convex parts protruding outwards are arranged on the first metal sheet, a plurality of second cambered convex parts protruding outwards are arranged on the second metal sheet, and the first cambered convex parts correspond to the second cambered convex parts one to one.
6. A hot air drying system as claimed in claim 3, wherein: the circles of radiating fins are closely arranged.
7. A hot air drying system as claimed in claim 3, wherein: the number of the heating pipes is four.
8. The hot air drying system as claimed in claim 2, wherein: the second heating member is a heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921860684.7U CN211451445U (en) | 2019-10-31 | 2019-10-31 | Hot air drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921860684.7U CN211451445U (en) | 2019-10-31 | 2019-10-31 | Hot air drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211451445U true CN211451445U (en) | 2020-09-08 |
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ID=72300309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921860684.7U Active CN211451445U (en) | 2019-10-31 | 2019-10-31 | Hot air drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211451445U (en) |
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2019
- 2019-10-31 CN CN201921860684.7U patent/CN211451445U/en active Active
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