CN109137631A - The recycling of vapor while the device and method of system drying efficiency is improved in a kind of moulded paper pulp product drying system - Google Patents
The recycling of vapor while the device and method of system drying efficiency is improved in a kind of moulded paper pulp product drying system Download PDFInfo
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- CN109137631A CN109137631A CN201811046396.8A CN201811046396A CN109137631A CN 109137631 A CN109137631 A CN 109137631A CN 201811046396 A CN201811046396 A CN 201811046396A CN 109137631 A CN109137631 A CN 109137631A
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- vapor
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- humidification
- cooling pipe
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Paper (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses the device and methods of vapor in a kind of moulded paper pulp product drying system recycled while improving system drying efficiency, including dry cavity, dry transmission panel is equipped with inside the dry cavity, transverse slat is equipped at the top of the dry transmission panel, mounting plate is equipped at the top of the dry cavity inner wall, it is communicated with vapor reuse means at the top of the dry cavity, the vapor reuse means includes assembling supporting member, ventilating board, water storage tank, cooling pipe, refrigerator and water pump.The present invention is by being equipped with vapor reuse means, vapor is entered inside assembling supporting member by ventilating board, vapor rising is adjacent to cooling pipe surface, coolant liquid refrigeration is carried out heat with vapor and exchanged by the work of cooling pipe internal refrigeration storage device, it drips and is stored in water storage tank after vapor condensation, condensed water storage is used for the humidification of the resurgence again to paper mould, water resource is saved in energy-saving and emission-reduction.
Description
Technical field
The present invention relates to paper mould production field, in particular to vapor in a kind of moulded paper pulp product drying system
Recycle while improving the device and method of system drying efficiency.
Background technique
Paper pulp moulding product is in forming process, and after mold forms, product moisture content is up to 70% or so, needs pair
It is dried.Product moisture content after drying, if directly carrying out shaping, is easy to produce drawing crack, breakage down to 5% or so.
To avoid drawing crack, damaged generation, product surface needs to carry out humidification resurgence after drying, is increased to product surface moisture content
12% or so.
The drying mode being widely used at present is tunnel type drying, i.e., tunnel type drying channel is arranged in baking zone, will
The product for needing to dry is transmitted in tunnel type drying channel, and the high temperature formed using the heat that heat exchanger in drying tunnel distributes will produce
Moisture in product evaporates, and extracts vapor out drying cavity by dehumidifier blower, and dehumidifier blower takes vapor away and causes water
Therefore the waste of resource invents in a kind of moulded paper pulp product drying system the recycling of vapor while to improve system dry
The device and method of efficiency is necessary to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of recyclings of vapor in moulded paper pulp product drying system to improve simultaneously
The device and method of system drying efficiency, by being equipped with vapor reuse means, vapor enters collection shell by ventilating board
Internal portion, vapor rising are adjacent to cooling pipe surface, and cooling pipe internal refrigeration storage device works coolant liquid refrigeration and vapor
Heat exchange is carried out, drips and is stored in water storage tank after vapor condensation, condensed water storage is used for paper mould
Water resource is saved in resurgence humidification again, energy-saving and emission-reduction, to solve to extract vapor out drying cavity, dehumidifier by dehumidifier blower
Blower takes the problem of vapor causes the waste of water resource away.
To achieve the above object, the invention provides the following technical scheme: water steams in a kind of moulded paper pulp product drying system
The recycling of gas while the device for improving system drying efficiency, including dry cavity, the dry cavity inside are equipped with dry pass
Chances of losing games plate, the dry transmission panel top are equipped with transverse slat, are equipped with mounting plate, the drying chamber at the top of the dry cavity inner wall
Be communicated with vapor reuse means at the top of road, the vapor reuse means include assembling supporting member, ventilating board, water storage tank,
Cooling pipe, refrigerator and water pump, vapor reuse means two sides are equipped with air-heater, and the dry cavity side is set
There is humidification cavity, humidification transmission panel is equipped with inside the humidification cavity, is communicated between the dry cavity and humidification cavity
It is connected to chamber.
Preferably, the dry cavity side is equipped with feeding inlet, is uniformly provided with heating tube in the dry cavity inner cavity, institute
Heating tube is stated to wrap around filled with conduction oil.
Preferably, the dry transmission panel itself is uniformly provided with limbers, is equipped with side at the top of the dry transmission panel
Plate, the side plate interior sides are equipped with clamping plate, and electric pushrod is equipped between the side plate and clamping plate.
Preferably, the transverse slat bottom is uniformly provided with blowing mouth, and the blowing mouth is connected to by ventilation duct with air-heater.
Preferably, the mounting plate bottom is uniformly provided with pressure roller, and hydraulic lifting arm is equipped between the pressure roller and mounting plate.
Preferably, the assembling supporting member is set at the top of dry cavity, and the assembling supporting member bottom is equipped with ventilating board, described
Ventilating board is connected to dry cavity, and water storage tank is equipped with inside the assembling supporting member, and the water storage tank is set as V-shape, the receipts
Collect and be equipped with cooling pipe at the top of inner walls, is filled with inside coolant liquid and cooling pipe and is uniformly provided with inside the cooling pipe
Refrigerator, the cooling pipe bottom are uniformly provided with groove, are equipped with water pump on the outside of the assembling supporting member.
Preferably, it is equipped with fixed plate inside the humidification cavity, the fixed plate bottom is uniformly provided with fog-spray nozzle, described solid
Fixed board side is equipped with discharge port, and the discharge port is set to humidification transmission panels outside, is equipped with water storage at the top of the humidification cavity
Room, the fog-spray nozzle are connected to by aqueduct with reservoir chamber, and the reservoir chamber is connected to by water service pipe with water pump.
Preferably, the connection chamber is hollow setting, and the dry transmission panel sequentially passes through connection chamber and humidification cavity
It is connected to humidification transmission panel.
System is improved simultaneously the present invention also provides a kind of recycling of vapor in moulded paper pulp product drying system to do
The method of dry efficiency, specific steps are as follows:
Step 1: opening feeding inlet, the dry transmission that will enter in dry cavity by mold paper mould after molding
Panel surface, electric pushrod push clamping plate by the position restriction of paper mould, work with rear heating tube and air-heater, and heating tube will
Conduction oil is heated in dry cavity inner cavity, to improve dry cavity internal temperature, air-heater transmits hot gas to blowing mouth
Paper mould is heated by blowout at the top of paper mould；
Step 2: hydraulic lifting arm work belt dynamic pressure roller, which is moved down, squeezes paper mould by top, by its table
Face moisture content quickly removes, and improves drying efficiency, and moisture, which is heated, in drying course enters assembling supporting member by ventilating board for vapor
Inside, vapor rising are adjacent to cooling pipe surface, the work of cooling pipe internal refrigeration storage device by coolant liquid refrigeration and vapor into
The exchange of row heat is dripped after vapor condensation and is stored in water storage tank；
Step 3: paper mould is entered inside humidification cavity on humidification transmission panel by being connected to chamber, and pump working will be cold
Condensate extraction is stored in reservoir chamber, and the work of subsequent spray head sprays water mist to paper mould surface and carries out resurgence humidification, is humidified
Paper mould after the completion is transmitted to next processing program by discharge port.
Technical effect and advantage of the invention:
1, by being equipped with vapor reuse means, vapor is entered inside assembling supporting member by ventilating board, on vapor
It rises and is adjacent to cooling pipe surface, coolant liquid refrigeration is carried out heat with vapor and exchanged by the work of cooling pipe internal refrigeration storage device, water
It drips and is stored in water storage tank after steam condensation, condensed water storage is used for the humidification of the resurgence again to paper mould, section
Energy emission reduction, saves water resource；
2, by being equipped with humidification cavity and fog-spray nozzle, fog-spray nozzle sprays water mist and carries out resurgence humidification work to paper mould,
The water mist sprayed simultaneously can substantially reduce the humidity in humidification cavity, make paper mould natural in the high environment of air humidity
The moisture absorption, humidification resurgence uniform in effect, product yield is high, while humidifying resurgence and avoiding manual operation, saves manpower；
3, by being equipped with heating tube and air-heater, heating tube works the heat-conducting oil heating in dry cavity inner cavity, hot wind
Machine work dries paper mould blowout hot wind by blowing mouth, and dual-heated drying, good drying effect and rate is fast improves
Equipment whole work efficiency, hydraulic lifting arm Work Promote pressure roller, which squeeze to paper mould surface, while drying quickly goes
Except its internal moisture.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is drying cavity side view of the invention；
Fig. 3 is vapor reuse means structural schematic diagram of the invention；
In figure: 1 dry cavity, 11 feeding inlets, 12 heating tubes, 2 dry transmission panels, 21 side plates, 22 clamping plates, 23 electronic push away
Bar, 3 transverse slats, 31 blowing mouths, 4 mounting plates, 41 pressure rollers, 42 hydraulic lifting arms, 5 vapor reuse means, 51 assembling supporting members, 52
Ventilating board, 53 water storage tanks, 54 cooling pipes, 55 refrigerators, 56 water pumps, 6 air-heaters, 7 humidification cavities, 71 fixed plates, 72 are sprayed
Head, 73 discharge ports, 74 reservoir chambers, 8 humidification transmission panels, 9 connection chambers.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one:
The present invention provides the recyclings of vapor in a kind of moulded paper pulp product drying system as shown in Figs. 1-3 simultaneously
The device of raising system drying efficiency, including cavity 1 is dried, dry transmission panel 2 is equipped with inside the dry cavity 1, it is described
It is equipped with transverse slat 3 at the top of dry transmission panel 2, mounting plate 4, dry 1 top of cavity are equipped at the top of dry 1 inner wall of cavity
It is communicated with vapor reuse means 5, the vapor reuse means 5 includes assembling supporting member 51, ventilating board 52, water storage tank
53, cooling pipe 54, refrigerator 55 and water pump 56,5 two sides of vapor reuse means are equipped with air-heater 6, described dry
Dry 1 side of cavity is equipped with humidification cavity 7, is equipped with humidification transmission panel 8 inside the humidification cavity 7, the dry cavity 1 with add
Connection chamber 9 is communicated between wet cavity 7.
The assembling supporting member 51 is set to dry 1 top of cavity, and 51 bottom of assembling supporting member is equipped with ventilating board 52, described
Ventilating board 52 is connected to dry cavity 1, and water storage tank 53 is equipped with inside the assembling supporting member 51, and the water storage tank 53 is set as V word
Type, 51 inner wall of the assembling supporting member top are equipped with cooling pipe 54, are filled with coolant liquid and cooling inside the cooling pipe 54
Refrigerator 55 is uniformly provided with inside pipeline 54,54 bottom of cooling pipe is uniformly provided with groove, 51 outside of assembling supporting member
Equipped with water pump 56.
The utility model has the advantages that vapor is entered inside assembling supporting member 51 by ventilating board 52, vapor rising is adjacent to the present embodiment
Coolant liquid refrigeration is carried out heat with vapor and exchanged by 54 surface of cooling pipe, the work of 54 internal refrigeration storage device 55 of cooling pipe, water
It drips and is stored in water storage tank 53 after steam condensation, condensed water storage is used for the humidification of the resurgence again to paper mould,
Water resource is saved in energy-saving and emission-reduction.
Embodiment two:
1 side of dry cavity is equipped with feeding inlet 11, is uniformly provided with heating tube 12, institute in dry 1 inner cavity of cavity
Heating tube 12 is stated to wrap around filled with conduction oil.
It is uniformly provided with limbers inside the dry transmission panel 2, is equipped with side plate 21 at the top of the dry transmission panel 2,
It is equipped with clamping plate 22 on the inside of the side plate 21, electric pushrod 23 is equipped between the side plate 21 and clamping plate 22.
3 bottom of transverse slat is uniformly provided with blowing mouth 31, and the blowing mouth 31 is connected to by ventilation duct with air-heater 6.
4 bottom of mounting plate is uniformly provided with pressure roller 41, and hydraulic lifting arm is equipped between the pressure roller 41 and mounting plate 4
42。
The present embodiment is the utility model has the advantages that heating tube 12 works the heat-conducting oil heating in dry 1 inner cavity of cavity, 6 work of air-heater
Make to dry paper mould blowout hot wind by blowing mouth 31, dual-heated drying, good drying effect and rate is fast, raising is set
Standby whole work efficiency, 42 Work Promote pressure roller 41 of hydraulic lifting arm squeeze quickly to paper mould surface while drying
Remove its internal moisture.
Embodiment three:
Fixed plate 71 is equipped with inside the humidification cavity 7,71 bottom of fixed plate is uniformly provided with fog-spray nozzle 72, described solid
71 side of fixed board is equipped with discharge port 73, and the discharge port 73 is set to 8 outside of humidification transmission panel, 7 top of humidification cavity
Equipped with reservoir chamber 74, the fog-spray nozzle 72 is connected to by aqueduct with reservoir chamber 74, and the reservoir chamber 74 passes through water service pipe and water
56 connection of pump.
The connection chamber 9 is hollow setting, and the drying transmission panel 2 sequentially passes through connection chamber 9 and humidification cavity 7 and adds
Wet transmission panel 8 is connected to.
The present embodiment carries out resurgence humidification work to paper mould the utility model has the advantages that fog-spray nozzle 72 sprays water mist, sprays simultaneously
Water mist can substantially reduce the humidity in humidification cavity 7, allow paper mould natural moisture absorption in the high environment of air humidity, add
Wet resurgence uniform in effect, product yield is high, while humidifying resurgence and avoiding manual operation, saves manpower.
Example IV:
System is improved simultaneously the present invention also provides a kind of recycling of vapor in moulded paper pulp product drying system to do
The method of dry efficiency, specific steps are as follows:
Step 1: opening feeding inlet 11, the dry biography that will enter in dry cavity 1 by mold paper mould after molding
2 surface of chances of losing games plate, electric pushrod 23 pushes clamping plate 22 by the position restriction of paper mould, with 6 work of rear heating tube 12 and air-heater
Make, heating tube 12 heats conduction oil in dry 1 inner cavity of cavity, to improve dry 1 internal temperature of cavity, air-heater 6
Transmission hot gas heats paper mould by blowout at the top of paper mould to blowing mouth 31；
Step 2: 42 work belt dynamic pressure roller 41 of hydraulic lifting arm, which is moved down, squeezes paper mould by top, will
Its surface moisture content quickly removes, and improves drying efficiency, and moisture content is heated to enter for vapor by ventilating board 52 and receive in drying course
Collect inside shell 51, vapor rising is adjacent to 54 surface of cooling pipe, and 54 internal refrigeration storage device 55 of cooling pipe works coolant liquid
Refrigeration carries out heat with vapor and exchanges, and drips and is stored in water storage tank 53 after vapor condensation；
Step 3: paper mould is entered inside humidification cavity 7 on humidification transmission panel 8 by connection chamber 9, and water pump 56 works
Condensed water extraction is stored in reservoir chamber 74, the work of subsequent spray head 72 sprays water mist and get damp again to paper mould surface to be added
Wet, the paper mould after the completion of humidifying is transmitted to next processing program by discharge port 73.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (9)
1. the device of vapor recycled while improving system drying efficiency in a kind of moulded paper pulp product drying system, including
Dry cavity (1), it is characterised in that: dry transmission panel (2), the dry transmission surface are equipped with inside the dry cavity (1)
Transverse slat (3) are equipped at the top of plate (2), are equipped with mounting plate (4) at the top of dry cavity (1) inner wall, at the top of the dry cavity (1)
Be communicated with vapor reuse means (5), the vapor reuse means (5) include assembling supporting member (51), ventilating board (52),
Water storage tank (53), cooling pipe (54), refrigerator (55) and water pump (56), vapor reuse means (5) two sides are all provided with
Have air-heater (6), dry cavity (1) side is equipped with humidification cavity (7), is equipped with humidification inside the humidification cavity (7) and passes
Chances of losing games plate (8) is communicated between the dry cavity (1) and humidification cavity (7) and is connected to chamber (9).
2. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 1
The device of drying efficiency, it is characterised in that: dry cavity (1) side is equipped with feeding inlet (11), in the dry cavity (1)
It is uniformly provided in chamber heating tube (12), the heating tube (12) wraps around filled with conduction oil.
3. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 1
The device of drying efficiency, it is characterised in that: limbers, the dry transmission are uniformly provided with inside dry transmission panel (2)
Side plate (21) are equipped at the top of panel (2), are equipped with clamping plate (22) on the inside of the side plate (21), the side plate (21) and clamping plate (22) it
Between be equipped with electric pushrod (23).
4. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 1
The device of drying efficiency, it is characterised in that: transverse slat (3) bottom is uniformly provided with blowing mouth (31), and the blowing mouth (31) is logical
Ventilation duct is crossed to be connected to air-heater (6).
5. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 1
The device of drying efficiency, it is characterised in that: mounting plate (4) bottom is uniformly provided with pressure roller (41), the pressure roller (41) and peace
Hydraulic lifting arm (42) are equipped between loading board (4).
6. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 1
The device of drying efficiency, it is characterised in that: the assembling supporting member (51) is set at the top of dry cavity (1), the assembling supporting member
(51) bottom is equipped with ventilating board (52), and the ventilating board (52) is connected to dry cavity (1), sets inside the assembling supporting member (51)
Have water storage tank (53), the water storage tank (53) is set as V-shape, is equipped with cooling pipe at the top of assembling supporting member (51) inner wall
(54), it is filled with inside the cooling pipe (54) inside coolant liquid and cooling pipe (54) and is uniformly provided with refrigerator (55), institute
It states cooling pipe (54) bottom and is uniformly provided with groove, be equipped with water pump (56) on the outside of the assembling supporting member (51).
7. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 6
The device of drying efficiency, it is characterised in that: be equipped with fixed plate (71) inside the humidification cavity (7), fixed plate (71) bottom
Portion is uniformly provided with fog-spray nozzle (72), and fixed plate (71) side is equipped with discharge port (73), and the discharge port (73), which is set to, to be added
On the outside of wet transmission panel (8), reservoir chamber (74) are equipped at the top of the humidification cavity (7), the fog-spray nozzle (72) passes through aqueduct
It is connected to reservoir chamber (74), the reservoir chamber (74) is connected to by water service pipe with water pump (56).
8. the recycling of vapor improves system simultaneously in a kind of moulded paper pulp product drying system according to claim 1
The device of drying efficiency, it is characterised in that: the connection chamber (9) is hollow setting, and dry transmission panel (2) sequentially passes through
Connection chamber (9) and humidification cavity (7) are connected to humidification transmission panel (8).
9. the recycling of vapor while the method for improving system drying efficiency, special in a kind of moulded paper pulp product drying system
Sign is: specific steps are as follows:
Step 1: opening feeding inlet (11), and the dry biography in dry cavity (1) will be entered by mold paper mould after molding
Chances of losing games plate (2) surface, electric pushrod (23) pushes clamping plate (22) by the position restriction of paper mould, with rear heating tube (12) and heat
Blower (6) work, heating tube (12) heats conduction oil in dry cavity (1) inner cavity, to improve in dry cavity (1)
Portion's temperature, air-heater (6) transmit hot gas and are heated to blowing mouth (31) by blowout at the top of paper mould to paper mould；
Step 2: hydraulic lifting arm (42) work belt dynamic pressure roller (41), which is moved down, squeezes paper mould by top, will
Its surface moisture content quickly removes, and improves drying efficiency, and moisture, which is heated, in drying course is entered for vapor by ventilating board (52)
Assembling supporting member (51) is internal, and vapor rising is adjacent to cooling pipe (54) surface, cooling pipe (54) internal refrigeration storage device (55) work
Make to exchange coolant liquid refrigeration with vapor progress heat, drippage is stored in water storage tank (53) after vapor condensation；
Step 3: paper mould is entered inside humidification cavity (7) in humidification transmission panel (8) by connection chamber (9), water pump (56)
Condensed water extraction is stored in reservoir chamber (74) by work, subsequent spray head (72) work to paper mould surface spray water mist into
Row resurgence humidification, the paper mould after the completion of humidifying are transmitted to next processing program by discharge port (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046396.8A CN109137631A (en) | 2018-09-07 | 2018-09-07 | The recycling of vapor while the device and method of system drying efficiency is improved in a kind of moulded paper pulp product drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811046396.8A CN109137631A (en) | 2018-09-07 | 2018-09-07 | The recycling of vapor while the device and method of system drying efficiency is improved in a kind of moulded paper pulp product drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109137631A true CN109137631A (en) | 2019-01-04 |
Family
ID=64824014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811046396.8A Withdrawn CN109137631A (en) | 2018-09-07 | 2018-09-07 | The recycling of vapor while the device and method of system drying efficiency is improved in a kind of moulded paper pulp product drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109137631A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110623793A (en) * | 2019-08-26 | 2019-12-31 | 南安市德力拉建材贸易有限公司 | Drying and anti-cracking system for making pulp sheets of sanitary towels |
| WO2020223943A1 (en) * | 2019-05-09 | 2020-11-12 | 金箭印刷科技(昆山)有限公司 | Pulp molding process and online intelligent drying device therefor |
-
2018
- 2018-09-07 CN CN201811046396.8A patent/CN109137631A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020223943A1 (en) * | 2019-05-09 | 2020-11-12 | 金箭印刷科技(昆山)有限公司 | Pulp molding process and online intelligent drying device therefor |
| CN113811654A (en) * | 2019-05-09 | 2021-12-17 | 金箭印刷科技(昆山)有限公司 | Paper pulp molding process and online intelligent drying equipment thereof |
| CN113811654B (en) * | 2019-05-09 | 2023-07-25 | 金箭印刷科技(昆山)有限公司 | Pulp molding process and online intelligent drying equipment thereof |
| US11976422B2 (en) | 2019-05-09 | 2024-05-07 | Golden Arrow Printing Technology (Kunshan) Co., Ltd. | Pulp-molding process and in-line intelligently drying apparatus therefor |
| CN110623793A (en) * | 2019-08-26 | 2019-12-31 | 南安市德力拉建材贸易有限公司 | Drying and anti-cracking system for making pulp sheets of sanitary towels |
| CN110623793B (en) * | 2019-08-26 | 2021-12-10 | 淮北市荣恋科技有限公司 | Drying and anti-cracking system for making pulp sheets of sanitary towels |
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Application publication date: 20190104 |