阅读说明：本技术 熔喷布水刺生产线 (Melt-blown fabric spunlace production line ) 是由 孙祥俊 付主木 孙月群 郭乃祥 陆顺杰 于 2020-08-06 设计创作，主要内容包括：本发明公开了一种熔喷布水刺生产线,包括：设置在前端的放卷装置,在所述放卷装置的后端设置与水刺装置,在所述水刺装置的后端设置有多级烘干装置,在所述多级烘干装置的后端设置有自动收卷装置,在所述自动收卷装置与多级烘干装置之间设置有纵向分切刀组,所述水刺装置的结构包括：第一机架,在所述第一机架内通过第一传动机构设置有第一传送带,在所述第一机架的前端设置有第一前支撑辊,在所述第一前支撑辊上端的第一机架上设置有上布辊,在所述第一机架的后端设置有第一后支撑辊,在所述第一机架的上端设置有两组纵向水刺喷头,两组纵向水刺喷头通过水管与水泵的出水口相连接。(The invention discloses a melt-blown fabric spunlace production line, which comprises: the unwinding device of setting at the front end unwinding device's rear end setting and water thorn device the rear end of water thorn device is provided with multistage drying device the rear end of multistage drying device is provided with the automatic winding device be provided with vertical branch cutter group between automatic winding device and the multistage drying device, the structure of water thorn device includes: the cloth feeding machine comprises a first rack, wherein a first conveying belt is arranged in the first rack through a first transmission mechanism, a first front supporting roller is arranged at the front end of the first rack, a cloth feeding roller is arranged on the first rack at the upper end of the first front supporting roller, a first rear supporting roller is arranged at the rear end of the first rack, two sets of longitudinal spunlace nozzles are arranged at the upper end of the first rack, and the two sets of longitudinal spunlace nozzles are connected with a water outlet of a water pump through a water pipe.)

1. Melt-blown fabric water thorn production line, its characterized in that: the method comprises the following steps: set up unwinding device (1) at the front end the rear end of unwinding device (1) sets up and spunlace device (2) the rear end of spunlace device (2) is provided with multi-stage drying device (3) the rear end of multi-stage drying device (3) is provided with automatic winding device (4) be provided with vertical branch cutter unit (5) between automatic winding device (4) and multi-stage drying device (3), the structure of spunlace device (2) includes: the device comprises a first rack (6), wherein a first conveying belt (7) is arranged in the first rack (6) through a first transmission mechanism, a first front support roller (8) is arranged at the front end of the first rack (6), a cloth feeding roller (9) is arranged on the first rack (6) at the upper end of the first front support roller (8), a first rear support roller (10) is arranged at the rear end of the first rack (6), two groups of longitudinal spunlace nozzles (11) are arranged at the upper end of the first rack (6), the two groups of longitudinal spunlace nozzles (11) are connected with a water outlet of a water pump (13) through water pipes (12), a water inlet of the water pump (13) is connected with a pure water preparation device (14), two groups of corresponding first vacuum covers (15) are arranged in the first rack (6) at the lower ends of the two groups of longitudinal spunlace nozzles (11), and the upper end of the first conveying belt (7) passes through the spunlace nozzles (11) and is connected with a first vacuum cover (15), the lower extreme of two sets of first vacuum hood (15) is connected with first U type exhaust column (16) of setting on first frame (6), the middle part of first U type exhaust column (16) is connected with moisture separator (18) through connecting pipe (17), moisture separator (18) are connected with the first suction opening of first centrifugal fan (20) through first exhaust column (19), the first air outlet and the outside of first centrifugal fan (20) communicate each other the bilateral symmetry of first U type exhaust column (16) is provided with first manual butterfly valve (21) be provided with drain hole (22) on moisture separator (18), the structure of multistage drying device (3) includes: second frame (23) be provided with second conveyer belt (24) through second drive mechanism in second frame (23) the front end of second frame (23) is provided with tight roller (25) and preceding supporting roller of second (26) the rear end of second frame (23) is provided with back supporting roller of second (27) the upper end of second frame (23) evenly is provided with a plurality of drying unit (28), the structure of drying unit (28) includes: the drying device comprises an outer drying oven (29) arranged on a second rack (23), a drying cavity (30) is arranged in the outer drying oven (29), an inner drying oven (31) is arranged at the upper end inside the outer drying oven (29), a plurality of drying nozzles (32) are uniformly arranged at the lower end of the inner drying oven (31), a circulating fan (33) is arranged at the upper end of the outer drying oven (29), an air inlet of the circulating fan (33) is communicated with the drying cavity (30) through an air inlet pipe (34), an air outlet of the circulating fan (33) is communicated with the inner drying oven (31) through an exhaust pipe (35), a heating device (36) is arranged on the exhaust pipe (35), and the upper end of a second conveyor belt (24) sequentially penetrates through the drying cavity (30) in each drying unit (28) from front to back.

2. A meltblown hydroentangling line as set forth in claim 1, wherein: two groups of second vacuum covers (37) are arranged in a first rack (6) at the rear end of a first vacuum cover (15), the lower ends of the two groups of second vacuum covers (37) are connected with a second U-shaped exhaust pipe (38) arranged on the first rack (6), the middle part of the second U-shaped exhaust pipe (38) is connected with a second exhaust opening of a second centrifugal fan (40) through a second exhaust pipe (39), a second air outlet of the second centrifugal fan (40) is communicated with the outside, and second manual butterfly valves (41) are symmetrically arranged on two sides of the second U-shaped exhaust pipe (38).

3. A meltblown hydroentangling line as set forth in claim 2, wherein: a water collecting tank (42) is arranged at the lower end of the first frame (6).

4. A meltblown hydroentangling line according to claim 3, characterized in that: five drying units (28) are uniformly arranged at the upper end of the second rack (23).

5. A meltblown hydroentangling line according to claim 4, characterized in that: a lower heat-insulating layer (43) is arranged at the bottom of the outer oven (29), and an upper heat-insulating layer (44) is arranged at the top of the inner oven (31).

6. A meltblown hydroentangling line according to claim 5, characterized in that: the first transmission mechanism includes: the automatic correction device is characterized in that first transmission rollers (45) arranged on the periphery of a first rack (6) are rotated, one of the first transmission rollers (45) is connected with a first driving device, a first transmission belt (7) is sleeved on the first transmission roller (45) in a rolling mode, and a first correction pair roller (46) matched with the first transmission belt (7) is arranged at the lower end of the first rack (6).

7. A meltblown hydroentangling line according to claim 6, characterized in that: the second transmission mechanism includes: rotate second driving roller (47) that sets up all around in second frame (23), one of them second driving roller (47) is connected with second drive arrangement (48), evenly rotates at the lower extreme of second frame (12) and is provided with a plurality of lower back-up rolls (49) evenly rotate in outer oven (29) and be provided with a plurality of upper supporting rollers (50), second conveyer belt (24) roll cap is established on second driving roller (47), lower back-up roll (49) and upper supporting rollers (50) the lower extreme of second frame (12) is provided with the second pair roller (51) of rectifying a deviation of mutually supporting with second conveyer belt (24).

Technical Field

The invention relates to the field of melt-blown fabric production, in particular to a melt-blown fabric spunlace production line.

Background

The melt-blown fabric mainly uses polypropylene as a main raw material, and the diameter of the fiber can reach 1-5 microns. The superfine fiber with the unique capillary structure increases the number and the surface area of the fiber per unit area, so that the melt-blown fabric has good filtering property, shielding property, heat insulation property and oil absorption property, and is the most core production material of the mask. The medical mask and the N95 mask are both composed of a spunbond layer, a melt-blown layer and a spunbond layer, wherein the spunbond layer and the melt-blown layer are both made of polypropylene PP materials.

With the rapid increase of the demand of foreign masks, the price of melt-blown fabric is rapidly increased from 1.8 ten thousand yuan/ton before epidemic situation to 20 ten thousand yuan/ton at the bottom of 2 months, and from 52 ten thousand yuan/ton in the last ten days of 3 months, the highest price is 80 ten thousand, and the price is increased by more than 40 times. After more than one week, the price of the melt-blown fabric is reduced to a certain extent, from about 80 ten thousand yuan/ton to about 35 ten thousand yuan/ton, the price is suddenly dropped by 45 ten thousand, and in the near future, due to wide outbreak of foreign epidemic situations, the melt-blown fabric is doubled again to over 55 ten thousand yuan/ton, and the supply and demand are still insufficient. Even at the lowest 35 ten thousand dollars per ton, there is at least approximately a 20-fold profit between meltblown fabrics versus epidemic situations.

The filtration performance of the melt-blown fabric is only 70% or less, and the mechanical positive barrier effect of a three-dimensional fiber aggregate with fine fibers, small gaps and high porosity is not enough. The filter resistance can be greatly increased by increasing the gram weight and the thickness of the material, so that the electrostatic charge effect is commonly added to melt-blown cloth by the melt-blown filter material through an electrostatic electret process, and the filter efficiency is improved by using an electrostatic method and can reach 99.9 to 99.99 percent. I.e., to KN95 standard or above.

The current melt-blown electrostatic electret method mainly comprises an electrostatic spinning method, a corona charging method, a friction electrification method, a thermal polarization method, a low-energy electron beam bombardment beating method and the like, wherein inorganic materials such as tourmaline, silicon dioxide, zirconium phosphate and the like are added into a PP (polypropylene) polymer in advance, then charges are carried on the melt-blown materials in a mode of one or more groups of corona discharge of the needle-shaped electrode voltage of an electrostatic generator of 35-50KV before cloth rolling, air below a needle point generates ionization under high voltage to generate local breakdown discharge, current carriers are deposited on the surface of the melt-blown cloth under the action of an electric field, and a part of the current carriers can penetrate into the surface layer and are captured by traps of electret master batches, so that the melt-blown cloth becomes an electret filter material.

Because of different electrostatic electret processes, the properties of the formed electret are also different, and the filtration performance is improved and the electrostatic durability is different. Along with the increase of the storage time, the electrostatic potential on the surface of the electret material is attenuated to some extent, the electrostatic attenuation trends of the surface points of the material under different charging voltages are the same, and the retention rates are not greatly different. Therefore, under the conditions of normal temperature and normal humidity, the PP melt-blown electret material has good charge storage stability, but when a sample is in a high-humidity environment, due to the polar groups in water molecules, the compensation effect of the anisotropic particles in the atmosphere on the charges on the fibers is realized, and a large amount of charges are lost. The charge decreases with increasing humidity and is faster and faster. Therefore, the melt-blown fabric is required to be stored in a moisture-proof manner in the transportation and storage processes, the contact with a high-humidity environment is avoided, the melt-blown fabric which reaches the standard is required to be bought in time, the melt-blown fabric is not well stored, the manufactured mask is difficult to reach the standard, and therefore the detection of the fabric which is clearly manufactured by a plurality of manufacturers at that time is up to the standard, and the fabric is unqualified in a later period.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a melt-blown fabric spunlace production line with good electret and drying effects.

In order to solve the technical problems, the invention adopts the technical scheme that: melt-blown fabric spunlace production line includes: the unwinding device of setting at the front end unwinding device's rear end setting and water thorn device the rear end of water thorn device is provided with multistage drying device the rear end of multistage drying device is provided with the automatic winding device be provided with vertical branch cutter group between automatic winding device and the multistage drying device, the structure of water thorn device includes: the device comprises a first frame, a first conveying belt is arranged in the first frame through a first transmission mechanism, a first front support roller is arranged at the front end of the first frame, a cloth feeding roller is arranged on the first frame at the upper end of the first front support roller, a first rear support roller is arranged at the rear end of the first frame, two groups of longitudinal spunlace nozzles are arranged at the upper end of the first frame and are connected with a water outlet of a water pump through water pipes, a water inlet of the water pump is connected with a pure water preparation device, two corresponding groups of first vacuum covers are arranged in the first frame at the lower ends of the two groups of longitudinal spunlace nozzles, the upper end of the first conveying belt penetrates between the spunlace nozzles and the first vacuum covers, the lower ends of the two groups of first vacuum covers are connected with a first U-shaped exhaust pipe arranged on the first frame, and the middle part of the first U-shaped exhaust pipe is connected with a water-gas separator through a connecting pipe, the water-gas separator is connected with a first suction opening of a first centrifugal fan through a first suction pipe, a first air outlet of the first centrifugal fan is communicated with the outside, first manual butterfly valves are symmetrically arranged on two sides of a first U-shaped suction pipe, a water drain opening is formed in the water-gas separator, and the multi-stage drying device structurally comprises: the second frame be provided with the second conveyer belt through second drive mechanism in the second frame the front end of second frame is provided with tight roller and the preceding supporting roller of second the rear end of second frame is provided with the back supporting roller of second the upper end of second frame evenly is provided with a plurality of stoving units, the structure of stoving unit includes: the drying device comprises an outer drying oven arranged on a second rack, wherein a drying cavity is arranged in the outer drying oven, an inner drying oven is arranged at the upper end in the outer drying oven, a plurality of drying nozzles are uniformly arranged at the lower end of the inner drying oven, a circulating fan is arranged at the upper end of the outer drying oven, an air inlet of the circulating fan is communicated with the drying cavity through an air inlet pipe, an air outlet of the circulating fan is communicated with the inner drying oven through an exhaust pipe, a heating device is arranged on the exhaust pipe, and the upper end of a second conveyor belt sequentially penetrates through the drying cavity in each drying unit from front to back.

In order to better solve the technical problems, the invention adopts the further technical scheme that: two groups of second vacuum covers are arranged in a first machine frame at the rear end of the first vacuum cover, the lower ends of the two groups of second vacuum covers are connected with a second U-shaped exhaust pipe arranged on the first machine frame, the middle part of the second U-shaped exhaust pipe is connected with a second exhaust opening of a second centrifugal fan through the second exhaust pipe, a second air outlet of the second centrifugal fan is communicated with the outside, and second manual butterfly valves are symmetrically arranged on two sides of the second U-shaped exhaust pipe.

In order to better solve the technical problems, the invention adopts the further technical scheme that: and a water collecting tank is arranged at the lower end of the first frame.

In order to better solve the technical problems, the invention adopts the further technical scheme that: and five drying units are uniformly arranged at the upper end of the second rack.

In order to better solve the technical problems, the invention adopts the further technical scheme that: the bottom of the outer oven is provided with a lower heat-insulating layer, and the top of the inner oven is provided with an upper heat-insulating layer.

In order to better solve the technical problems, the invention adopts the further technical scheme that: the first transmission mechanism includes: the first transmission rollers are rotatably arranged on the periphery of the first frame, one of the first transmission rollers is connected with the first driving device, the first transmission belt is sleeved on the first transmission roller in a rolling mode, and the lower end of the first frame is provided with a first deviation rectifying pair roller matched with the first transmission belt.

In order to better solve the technical problems, the invention adopts the further technical scheme that: the second transmission mechanism includes: rotate the second driving roller that sets up around the second frame, one of them second driving roller is connected with second drive arrangement, evenly rotates at the lower extreme of second frame and is provided with a plurality of lower back-up rolls evenly rotates in the outer oven and is provided with a plurality of upper supporting rolls, the second conveyer belt roll sleeve is established on second driving roller, lower back-up roll and upper supporting roll the lower extreme of second frame is provided with the second pair roller of rectifying a deviation of mutually supporting with the second conveyer belt.

The invention has the advantages that: the melt-blown fabric spunlace production line has a novel structure, pure water is adopted to carry out spunlace permeation on melt-blown fabric, electric charges are generated by friction of the pure water and the melt-blown fabric, so that spunlace electret is completed, the electret effect is good, the melt-blown fabric can obtain more electrets, the electrets are more stable and long in holding time, so that the melt-blown fabric can obtain higher filtering effect, the air permeability and the adsorption performance are obviously improved, a centrifugal fan and a vacuum cover are adopted under a spunlace nozzle and under the rear end to adsorb the pure water and atomized water vapor after the spunlace permeation, when the melt-blown fabric spunlace production line is positioned under the spunlace nozzle for adsorption, a water-gas separator is adopted for water-gas separation due to higher water content, when the melt-blown fabric spunlace nozzle is positioned under the rear end for adsorption, only a small amount of water vapor can be directly discharged, and a water collecting tank is also used for collecting a, can effectively improve operational environment and carry out the maximum recovery to the pure water, practice thrift manufacturing cost, multistage drying device adopts five drying unit to carry out multistage stoving to the melt-blown fabric behind the water thorn electret, adopts circulating fan to carry out the inner loop heating in every drying unit to adopt hot-blast wind to drench the mode and spray the stoving to melt-blown fabric surface, the heating is even, and it is effectual to dry, can also effectively the energy can be saved.

Drawings

FIG. 1 is a schematic diagram of a meltblown hydroentangling line according to the present invention.

Fig. 2 is an enlarged schematic view of the water needling apparatus shown in fig. 1.

Fig. 3 is a schematic top view of fig. 2.

Fig. 4 is an enlarged schematic structural view of the drying unit in fig. 1.

In the figure: 1. unreeling device, 2, spunlace device, 3, multi-stage drying device, 4, automatic winding device, 5, longitudinal slitting knife group, 6, first frame, 7, first conveyor belt, 8, first front support roller, 9, cloth feeding roller, 10, first rear support roller, 11, longitudinal spunlace nozzle, 12, water pipe, 13, water pump, 14, pure water preparation device, 15, first vacuum cover, 16, first U-shaped exhaust pipe, 17, connecting pipe, 18, water-gas separator, 19, first exhaust pipe, 20, first centrifugal fan, 21, first manual butterfly valve, 22, water outlet, 23, second frame, 24, second conveyor belt, 25, tension roller, 26, second support roller, 27, second rear support roller, 28, drying unit, 29, outer oven, 30, drying cavity, 31, inner oven, 32, jel nozzle, 33, circulating fan, 34, air inlet pipe, 35, and front support pipe, 36. the device comprises a heating device, 37, a second vacuum cover, 38, a second U-shaped exhaust pipe, 39, a second exhaust pipe, 40, a second centrifugal fan, 41, a second manual butterfly valve, 42, a water collecting tank, 43, a lower heat insulation layer, 44, an upper heat insulation layer, 45, a first driving roller, 46, a first deviation rectifying pair roller, 47, a second driving roller, 48, a second driving device, 49, a lower supporting roller, 50, an upper supporting roller, 51, a second deviation rectifying pair roller, 52 and melt-spraying cloth.

Detailed Description

The details of the present invention are described below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, 2, 3, and 4, the meltblown hydroentangling line includes: set up unwinding device 1 at the front end unwinding device 1's rear end setting and water thorn device 2's rear end is provided with multistage drying device 3's rear end is provided with automatic winding device 4 be provided with vertical branch cutter group 5 between automatic winding device 4 and the multistage drying device 3, water thorn device 2's structure includes: a first machine frame 6, wherein a first conveyor belt 7 is arranged in the first machine frame 6 through a first transmission mechanism, a first front support roller 8 is arranged at the front end of the first machine frame 6, a cloth feeding roller 9 is arranged on the first machine frame 6 at the upper end of the first front support roller 8, a first rear support roller 10 is arranged at the rear end of the first machine frame 6, two groups of longitudinal spunlace nozzles 11 are arranged at the upper end of the first machine frame 6, the two groups of longitudinal spunlace nozzles 11 are connected with a water outlet of a water pump 13 through a water pipe 12, a water inlet of the water pump 13 is connected with a pure water preparation device 14, two corresponding groups of first vacuum covers 15 are arranged in the first machine frame 6 at the lower ends of the two groups of longitudinal spunlace nozzles 11, the upper end of the first conveyor belt 7 passes through a space between the spunlace nozzles 11 and the first vacuum covers 15, and the lower ends of the two groups of first vacuum covers 15 are connected with a first U-shaped exhaust pipe, the middle part of the first U-shaped air suction pipe 16 is connected with a water-gas separator 18 through a connecting pipe 17, the water-gas separator 18 is connected with a first air suction opening of a first centrifugal fan 20 through a first air suction pipe 19, a first air outlet of the first centrifugal fan 20 is communicated with the outside, first manual butterfly valves 21 are symmetrically arranged on two sides of the first U-shaped air suction pipe 16, a water discharge opening 22 is formed in the water-gas separator 18, and the multistage drying device 3 comprises: second frame 23 be provided with second conveyer belt 24 through second drive mechanism in the second frame 23 the front end of second frame 23 is provided with tight roller 25 and the preceding backing roll 26 of second the rear end of second frame 23 is provided with the back backing roll 27 of second the upper end of second frame 23 evenly is provided with a plurality of stoving units 28, stoving unit 28's structure includes: the drying device comprises an outer drying oven 29 arranged on the second rack 23, a drying cavity 30 is arranged in the outer drying oven 29, an inner drying oven 31 is arranged at the upper end inside the outer drying oven 29, a plurality of drying nozzles 32 are uniformly arranged at the lower end of the inner drying oven 31, a circulating fan 33 is arranged at the upper end of the outer drying oven 29, an air inlet of the circulating fan 33 is communicated with the drying cavity 30 through an air inlet pipe 34, an air outlet of the circulating fan 33 is communicated with the inner drying oven 31 through an air exhaust pipe 35, a heating device 36 is arranged on the air exhaust pipe 35, and the upper end of the second conveyor belt 24 sequentially penetrates through the drying cavity 30 in each drying unit 28 from front to back.

As shown in fig. 1, 2 and 3, in this example, two sets of second vacuum hoods 37 are disposed in the first chassis 6 at the rear end of the first vacuum hood 15, the lower ends of the two sets of second vacuum hoods 37 are connected to a second U-shaped exhaust pipe 38 disposed on the first chassis 6, the middle of the second U-shaped exhaust pipe 38 is connected to a second exhaust opening of a second centrifugal fan 40 through a second exhaust pipe 39, a second air outlet of the second centrifugal fan 40 is communicated with the outside, and second manual butterfly valves 41 are symmetrically disposed on two sides of the second U-shaped exhaust pipe 38.

As shown in fig. 1 and 2, in this example, a water collection tank 42 is provided at a lower end of the first housing 6.

As shown in fig. 1, in this example, five drying units 28 are uniformly disposed at the upper end of the second frame 23.

As shown in fig. 1 and 4, in this example, a lower insulating layer 43 is provided on the bottom of the outer oven 29, and an upper insulating layer 44 is provided on the top of the inner oven 31.

As shown in fig. 1 and 2, in this example, the first transmission mechanism includes: the first transmission rollers 45 are rotatably arranged around the first frame 6, one of the first transmission rollers 45 is connected with the first driving device, the first transmission belt 7 is sleeved on the first transmission roller 45 in a rolling manner, and the lower end of the first frame 6 is provided with a first deviation-rectifying pair roller 46 matched with the first transmission belt 7.

As shown in fig. 1 and 4, in this example, the second transmission mechanism includes: rotate the second driving roller 47 that sets up around second frame 23, one of them second driving roller 47 is connected with second drive arrangement 48, evenly rotates at the lower extreme of second frame 12 and is provided with a plurality of lower supporting rollers 49 evenly rotates in outer oven 29 and is provided with a plurality of upper supporting rollers 50, second conveyer belt 24 roll cover is established on second driving roller 47, lower supporting rollers 49 and upper supporting rollers 50 the lower extreme of second frame 12 is provided with the second pair roller 51 of rectifying a deviation of mutually supporting with second conveyer belt 24.

The pure water production apparatus 14 adopts conventional production processes, which include: raw water → raw water tank → raw water booster pump → quartz sand filter → activated carbon filter → antisludging agent feeding equipment → precision filter → first-stage high-pressure pump → first-stage reverse osmosis system → second-stage high-pressure pump → second-stage reverse osmosis system → EDI pump → EDI system → ultrapure water tank → water pump 13, thereby almost completely removing the conductive medium in the water, removing colloid substances, gas and organic matters which are not dissociated in the water to a very low degree, and enabling the specific resistance of the discharged water to reach 18.25 megaohms.

When the spunlace electret is completed, the meltblown 52 is unreeled from the unreeling device 1, the meltblown is delivered to be attached to the upper end of the first conveyor belt 7 through the first front support roller 8 and the upper cloth roller 9 in sequence by manual traction, the first drive device drives the first drive roller 45 to rotate, the first drive roller 45 drives the first conveyor belt 7 to rotate, the first deviation-rectifying pair roller 46 can rectify the deviation of the first conveyor belt 7, the first conveyor belt 7 drives the meltblown 52 to move backwards, the water pump 13 is started, the water pump 13 pumps out the pure water prepared in the pure water preparation device 14 and sends the pure water into the two groups of longitudinal spunlace nozzles 11 through the water pipes 12, the high-pressure pure water carries out spunlace permeation on the meltblown 52 passing below through the longitudinal spunlace nozzles 11, charges are generated through friction between the pure water and the meltblown 52, so that the spunlace electret is completed, meanwhile, the first centrifugal fan 20 and the second centrifugal fan 40 are started, the first centrifugal fan 20 carries out air draft through the first draft pipe 19, the negative pressure formed in the first vacuum cover 15 can adsorb pure water which is spun-laced and penetrated by the melt-blown fabric 52 under the longitudinal water-jet nozzle 11, the mixture of the pure water, the water vapor and the air adsorbed by the first centrifugal fan 20 is separated by the water-gas separator 18, the separated air is discharged from the first air outlet of the first centrifugal fan 20, the pure water stays in the water-gas separator 18 and can be discharged through the water discharge port 22, the second centrifugal fan 40 performs air draft through the second air draft pipe 39, the negative pressure formed in the second vacuum cover 37 can adsorb air containing a small amount of water vapor around the melt-blown fabric 52 at the rear end of the longitudinal water-jet nozzle 11, the air containing a small amount of water vapor adsorbed by the second centrifugal fan 40 can be directly discharged through the second air outlet, the first manual butterfly valve 21 can adjust the air output at two sides of the middle part of the first U-shaped air draft pipe 16, the second manual butterfly valve 41 can adjust the air output at two sides of the middle, the water collection tank 42 can collect a small portion of the pure water that drips.

During drying, the melt-blown fabric 52 after being subjected to spunlace electret is sequentially sent to be attached to the upper end of the second conveyor belt 24 through the tensioning roller 25 and the second front support roller 26 by manual traction, the second drive device 48 drives the second drive roller 47 to rotate, the second drive roller 47 drives the second conveyor belt 24 to rotate, the lower end of the second conveyor belt 24 is supported by the lower support roller 49, the upper end of the second conveyor belt 24 is supported by the upper support roller 50, the second deviation correction roller 51 can correct the deviation of the second conveyor belt 24, the second conveyor belt 24 drives the melt-blown fabric 52 to move backwards and sequentially pass through the five drying units 28, the circulating fan 33 is started, the circulating fan 33 pumps air in the drying cavity 30 out and sequentially passes through the air inlet pipe 34 and the circulating fan 33 to reach the exhaust pipe 35, the heating device 36 in the exhaust pipe 35 can heat the air, the heated air enters the inner drying oven 31 and is sprayed out from the nozzle 32 to dry the melt-blown fabric 52, the dried air can be recycled by the circulating fan 33 after being reduced by a certain temperature, so that the energy consumption is reduced.

The dried meltblown fabric is slit longitudinally by the longitudinal slitting knife group 5, and a plurality of meltblown fabrics 52 cut into pieces with the same longitudinal width are wound by the automatic winding device 4.

The melt-blown fabric spunlace production line has a novel structure, pure water is adopted to carry out spunlace permeation on melt-blown fabric, electric charges are generated by friction of the pure water and the melt-blown fabric, so that spunlace electret is completed, the electret effect is good, the melt-blown fabric can obtain more electrets, the electrets are more stable and long in holding time, so that the melt-blown fabric can obtain higher filtering effect, the air permeability and the adsorption performance are obviously improved, a centrifugal fan and a vacuum cover are adopted under a spunlace nozzle and under the rear end to adsorb the pure water and atomized water vapor after the spunlace permeation, when the melt-blown fabric spunlace production line is positioned under the spunlace nozzle for adsorption, a water-gas separator is adopted for water-gas separation due to higher water content, when the melt-blown fabric spunlace nozzle is positioned under the rear end for adsorption, only a small amount of water vapor can be directly discharged, and a water collecting tank is also used for collecting a, can effectively improve operational environment and carry out the maximum recovery to the pure water, practice thrift manufacturing cost, multistage drying device adopts five drying unit to carry out multistage stoving to the melt-blown fabric behind the water thorn electret, adopts circulating fan to carry out the inner loop heating in every drying unit to adopt hot-blast wind to drench the mode and spray the stoving to melt-blown fabric surface, the heating is even, and it is effectual to dry, can also effectively the energy can be saved.