阅读说明：本技术 一种玻纤复合滤材的生产设备及生产系统和生产工艺 (Production equipment, production system and production process of glass fiber composite filter material ) 是由 吴耀春 杨超 石玉强 钱慧 李建 姚嘉兰 于 2020-06-23 设计创作，主要内容包括：本发明属于过滤材料的生产设备,具体涉及一种玻纤复合滤材的生产设备及生产系统和生产工艺,该玻纤复合滤材的生产设备包括：流浆箱,设置有浆料进口和浆料出口；成型网,与所述浆料出口连通；驱动机构,用于驱动所述成型网循环通过所述浆料出口；第一放卷辊,用于向所述流浆箱与成型网之间输送保护层；第一脱水装置,通过所述成型网与所述浆料出口连通；通过该生产设备使得无需添加热熔胶即可形成双层玻纤复合滤材,而且该双层玻纤复合滤材具有较高的抗张强度,使得在保证具有较高抗张强度的基础上,明显降低了滤材的过滤阻力和滤材压降,提高玻纤滤材的透气度,从而有利于延长使用寿命,降低能耗。(The invention belongs to production equipment of filter materials, and particularly relates to production equipment, a production system and a production process of a glass fiber composite filter material, wherein the production equipment of the glass fiber composite filter material comprises the following components: the head box is provided with a slurry inlet and a slurry outlet; a forming screen in communication with the slurry outlet; a drive mechanism for driving the forming wire to circulate through the slurry outlet; the first unwinding roller is used for conveying a protective layer between the head box and the forming net; a first dewatering device communicated with the slurry outlet through the forming wire; make through this production facility and need not to add the hot melt adhesive and can form the fine compound filter media of double-deck glass, this fine compound filter media of double-deck glass has higher tensile strength moreover for on the basis that the assurance has higher tensile strength, obviously reduced the filtration resistance and the filter media pressure drop of filter media, improve the air permeability of the fine filter media of glass, thereby be favorable to increase of service life, reduce the energy consumption.)

1. The utility model provides a production facility of fine compound filter media of glass, its characterized in that includes:

the head box is provided with a slurry inlet and a slurry outlet;

a forming screen in communication with the slurry outlet;

a drive mechanism for driving the forming wire to circulate through the slurry outlet;

the first unwinding roller is used for conveying a protective layer between the head box and the forming net;

and the first dewatering device is communicated with the slurry outlet through the forming net.

2. The production equipment of the glass fiber composite filter material according to claim 1, wherein the driving mechanism at least comprises a first driving roller and a second driving roller which are arranged at intervals, and the forming net is wound on the first driving roller and the second driving roller; the first drive roller is located upstream in the direction of movement of the forming wire and the second drive roller is located downstream in the direction of movement of the forming wire.

3. The apparatus for producing a glass fiber composite filter material as defined in claim 2, wherein the first unwinding roller is disposed adjacent to the first driving roller and adapted to rotate synchronously with the first driving roller and the second driving roller, respectively.

4. The apparatus for producing a glass fiber composite filter material according to claim 2 or 3, further comprising at least two baffles extending from the head box toward the forming wire, wherein at least one of the baffles is disposed adjacent to the first driving roller, and at least one of the baffles is disposed adjacent to the second driving roller;

the baffle is a polypropylene baffle.

5. The apparatus for producing the glass fiber composite filter material according to any one of claims 1 to 4, wherein a slurry conveying pipeline is connected to the slurry flow box at a slurry inlet; a pulp homogenizing roller is arranged in the pulp flowing box; the head box is a single-layer head box, a two-layer head box or a multi-layer head box; the first dewatering device is a vacuum dewatering box or a gravity dewatering box;

the first dewatering device is provided with at least one dewatering device; the first dewatering devices are controlled by independent pneumatic valves;

the forming net is a polyester forming net, and the protective layer is a non-woven fabric layer.

6. The production equipment of the glass fiber composite filter material according to any one of claims 2 to 4, wherein the driving mechanism further comprises a third driving roller, and the forming net sequentially bypasses the first driving roller, the second driving roller and the third driving roller and encloses an accommodating space; the first dewatering device is arranged in the containing space and close to the head box.

7. The apparatus for producing the glass fiber composite filter material according to any one of claims 1 to 6, wherein a forming zone is arranged in the head box, and the forming zone and the first dewatering device are both arranged in an inclined manner relative to the horizontal plane, and the inclined angle is 0-45 °.

8. A production system of a glass fiber composite filter material, which is characterized by comprising the production equipment of the glass fiber composite filter material as claimed in any one of claims 1 to 7 and further comprising a sizing device.

9. The production system of claim 8, wherein the sizing device is selected from at least one of a dip device, a spray device, and an overflow device;

the dipping device comprises a dipping tank for dipping the glass fiber filter material and a clamping device arranged in the dipping tank; the clamping device comprises an upper clamping net and a lower clamping net, and the upper clamping net and the lower clamping net respectively encircle at least two dipping driving rollers;

and a gap for the glass fiber filter material to pass through is reserved between the upper clamping net and the lower clamping net.

10. The production system according to claim 8 or 9, characterized in that the sizing device is provided with a second unreeling roll and a compound roll at the end remote from the headbox; a second dewatering device is also arranged between the sizing device and the head box; and at least one third dewatering device is arranged at one end of the sizing device far away from the head box.

11. The production process of the glass fiber composite filter material is characterized by comprising the following steps:

(1) preparing fiber slurry;

(2) introducing a protective layer on the forming net, conveying the fiber slurry to the protective layer, and dehydrating and forming to obtain the double-layer glass fiber composite filter material;

(3) coating a water-based sizing agent on the double-layer glass fiber composite filter material;

(4) and (5) drying to obtain the product.

12. The production process as claimed in claim 11, wherein the protective layer is a non-woven fabric, and the air permeability of the non-woven fabric is 1000-6000 mm/s; the drying temperature is 100-; coating by adopting an external sizing mode in the step (3); the external sizing process is at least one selected from a dipping process, a spraying process and a glue overflowing process; before the step (4), the method further comprises the step of introducing the protective layer on the double-layer glass fiber composite filter material again to prepare the three-layer glass fiber composite filter material.

Technical Field

The invention belongs to production equipment of a filter material, and particularly relates to production equipment, a production system and a production process of a glass fiber composite filter material.

Background

Along with the development of society and the improvement of the living standard of people, the requirements of people on the environmental quality are higher and higher, and the development and the application of dust removal technology and equipment are more and more emphasized in various countries in the world. At present, a bag type dust collector and an electrostatic dust collector are adopted in a dust collection device, the key of the bag type dust collector is a filtering material, and the glass fiber filtering material is widely applied to air and liquid filtration in multiple fields due to high temperature resistance, corrosion resistance, smooth surface, good dust stripping performance and good size stability. The production process of the glass fiber filter material is similar to that of special paper, the glass fiber filter material is mainly manufactured by wet papermaking, the minimum fiber diameter can reach about 0.2 mu m, and the glass fiber filter material has good interception and adsorption effects on pollutant particles in fluid. For example, patent document CN103276619A discloses a structure of inclined net former capable of producing single-layer glass fiber filter material, and chinese patent document CN108457116A discloses an open type single-net double-flow pulp inclined net former capable of producing multi-layer glass fiber filter material.

However, the glass fiber itself has low toughness, so that the single-layer glass fiber filter or the multi-layer glass fiber filter obtained has low tensile strength, and cannot be used alone for liquid filtration.

In the prior art, the following two methods are generally adopted to protect the glass fiber filter material.

Firstly, the surface of the glass fiber filter material is coated with adhesive. However, the glass fiber filter has low tensile strength, so that the glass fiber filter is likely to crack or wrinkle when impregnated with an adhesive, thereby causing damage to the filter and lowering the yield.

And secondly, preparing the glass fiber composite filter material by carrying out a hot melt adhesive compounding process on the single-layer glass fiber filter material and the protective layer. The protective layer is usually an organic filter material, such as a nonwoven fabric, which can perform the functions of coarse filtration and protection of the glass fiber filter material. The tensile strength of the double-layer or multi-layer glass fiber composite filter material obtained after compounding with the hot melt adhesive can be obviously improved, but on one hand, the single-layer glass fiber filter material is difficult to crack, wrinkle and damage in the coating process because the hot melt adhesive compounding process needs to adopt an adhesive to coat on the surface of the single-layer glass fiber filter material in advance. On the other hand, because a large amount of hot melt adhesive needs to be added between the glass fiber and the protective layer in the hot melt adhesive compounding process to ensure that the prepared glass fiber compound filter material has higher tensile strength, the use of the large amount of hot melt adhesive leads to the sharp increase of resistance (filtering resistance) generated by the fluid when the filtering device provided with the glass fiber compound filter material filters the fluid, thus leading to larger load for conveying the fluid to be processed to the filtering device, higher energy consumption, greatly shortened service life of the filtering device, and the dust holding capacity (pollutant holding capacity) which is not ideal often needs to be changed.

Therefore, how to reduce the filtration resistance of the composite glass fiber filter material on the basis of ensuring that the composite glass fiber filter material has higher tensile strength is one of the problems that the skilled person needs to solve urgently.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to solve the defect that the glass fiber composite filter material prepared by the prior art cannot reduce the filtering resistance of the filter material on the basis of ensuring higher tensile strength, thereby providing production equipment, a production system and a production process of the glass fiber composite filter material.

The invention solves another technical problem that when the adhesive is coated on the surface of the glass fiber filter material, the glass fiber filter material is easy to crack and wrinkle, so that the filter material is damaged, and the yield is reduced.

The invention provides a production device of a glass fiber composite filter material, which comprises:

the head box is provided with a slurry inlet and a slurry outlet;

a forming screen in communication with the slurry outlet;

a drive mechanism for driving the forming wire to circulate through the slurry outlet;

the first unwinding roller is used for conveying a protective layer between the head box and the forming net;

and the first dewatering device is communicated with the slurry outlet through the forming net.

Further, the driving mechanism at least comprises a first driving roller and a second driving roller which are arranged at intervals, and the forming net is wound on the first driving roller and the second driving roller; the first drive roller is located upstream in the direction of movement of the forming wire and the second drive roller is located downstream in the direction of movement of the forming wire.

Further, the first unwinding roller is arranged close to the first driving roller and is suitable for rotating synchronously with the first driving roller and the second driving roller respectively.

Further, still including locating by the head box orientation at least two baffles that the forming wire extends out, and at least one the baffle is close to first drive roller sets up, at least one the baffle is close to the second drive roller sets up.

Further, the tangent lines respectively tangent to the first unwinding roller and the first driving roller towards one side of the headbox are first tangent lines, the tangent lines respectively tangent to the first driving roller and the second driving roller towards one side of the headbox are second tangent lines, and the included angle between the first tangent line and the second tangent line is not less than 90 degrees, and preferably is 120 degrees and 180 degrees.

Further, a slurry conveying pipeline is connected to the position, located at the slurry inlet, of the head box; a pulp homogenizing roller is arranged in the pulp flowing box; the head box is a single-layer head box, a two-layer head box or a multi-layer head box; the first dewatering device is a vacuum dewatering box or a gravity dewatering box;

the first dewatering device is provided with at least one dewatering device; the first dewatering devices are controlled by independent pneumatic valves.

Furthermore, the forming net is a polyester forming net, the baffle is a polypropylene baffle, and the protective layer is a non-woven fabric layer;

further, a forming area is arranged in the head box, the forming area and the first dewatering device are both arranged in an inclined mode relative to the horizontal plane, and the inclined angle is 0-45 degrees.

Further, the driving mechanism further comprises a third driving roller, and the forming net sequentially bypasses the first driving roller, the second driving roller and the third driving roller and encloses an accommodating space; the first dewatering device is arranged in the containing space and close to the head box.

The invention also provides a production system of the glass fiber composite filter material, which is characterized by comprising any one of the production devices of the glass fiber composite filter material and a glue applying device.

Further, the sizing device is selected from at least one of a dip device, a spray device, and an overflow device.

Further, the dipping device comprises a dipping tank for dipping the glass fiber filter material and a clamping device arranged in the dipping tank.

Further, the clamping device comprises an upper clamping net and a lower clamping net, wherein the upper clamping net and the lower clamping net respectively encircle at least two impregnation driving rollers;

and a gap for the glass fiber filter material to pass through is reserved between the upper clamping net and the lower clamping net.

Further, a second unwinding roller and a composite roller are arranged at one end, far away from the head box, of the sizing device; a second dewatering device is also arranged between the sizing device and the head box; and at least one third dewatering device is arranged at one end of the sizing device far away from the head box.

The invention also provides a production process of the glass fiber composite filter material, which comprises the following steps:

(1) preparing fiber slurry;

(2) introducing a protective layer on the forming net, conveying the fiber slurry to the protective layer, and dehydrating and forming to obtain the double-layer glass fiber composite filter material;

(3) coating a water-based sizing agent on the double-layer glass fiber composite filter material;

(4) and (5) drying to obtain the product.

Further, in the step (2), a first unwinding roller is adopted to introduce a protective layer on the forming wire;

further, the protective layer is a non-woven fabric, and the air permeability of the non-woven fabric is 1000-6000 mm/s; the drying temperature is 100-; coating by adopting an external sizing mode in the step (3); the external sizing process is at least one selected from a dipping process, a spraying process and a glue overflowing process; before the step (4), the method further comprises the step of introducing the protective layer on the double-layer glass fiber composite filter material again to prepare the three-layer glass fiber composite filter material.

The technical scheme of the invention has the following advantages:

1. the invention provides a production device of a glass fiber composite filter material, which comprises a pulp flowing box, a forming net, a driving mechanism, a first unwinding roller and a first dewatering device, wherein the pulp flowing box is provided with a pulp inlet and a pulp outlet, the forming net is communicated with the pulp outlet, the driving mechanism is used for driving the forming net to circularly pass through the pulp outlet, the first unwinding roller is used for conveying a protective layer between the pulp flowing box and the forming net, the first dewatering device is communicated with the pulp outlet through the forming net, the protective layer is introduced between the pulp flowing box and the forming net through the first unwinding roller, the forming net and the protective layer are driven by the driving mechanism to pass through the pulp outlet of the pulp flowing box, meanwhile, fiber pulp flows downwards, the fiber pulp is remained on the protective layer through the pulp outlet of the pulp flowing box, and the fiber pulp flows downwards and is dewatered and formed under the action of the first dewatering device, thereby form the body structure of glass fiber filter media and protective layer, other devices with the production system of the compound filter media of glass fiber combine together promptly glue applying device, glue applying device applies a small amount of water-soluble sizing agent for the body structure surface of glass fiber filter media and protective layer, use this production facility in the production system of the compound filter media of glass fiber, make need not through a large amount of hot melt adhesives of coating, can prepare and obtain the compound filter media of the fine compound filter media of double-deck glass that has higher tensile strength, and on the basis that the assurance has higher tensile strength, the filtration resistance and the filter media pressure drop of filter media have still obviously been reduced, improve the air permeability of the fine filter media of glass, thereby be favorable to increase of service life, reduce the energy consumption.

In addition, because the traditional hot melt adhesive compounding process needs to glue the surface of the glass fiber filter material in advance, and when the dipping process is selected for gluing the surface of the glass fiber filter material, the glass fiber filter material is easy to crack and wrinkle, so that the problem of low filtering effect is caused.

2. According to the production equipment of the glass fiber composite filter material, the protective layer is introduced between the flow box and the forming net through the first unreeling roller, the forming net and the protective layer are driven by the first driving roller and the second driving roller to pass through the slurry outlet of the flow box, meanwhile, the fiber slurry in the flow box flows downwards, the fiber slurry is remained on the protective layer through the slurry outlet of the flow box, and meanwhile, the fiber slurry is dehydrated and formed under the action of the first dehydration device, so that an integrated structure of the glass fiber filter material and the protective layer is formed, the loss of the fiber slurry can be effectively reduced by utilizing the characteristic that the protective layer has a smaller gap than that of the traditional forming net, the retention rate of glass fibers is improved, the loss of the fiber slurry is reduced, the production cost is reduced, and the production efficiency is improved.

3. According to the production equipment of the glass fiber composite filter material, the first unreeling roller is arranged close to the first driving roller and is suitable for rotating synchronously with the first driving roller and the second driving roller respectively, so that glass fibers are formed more uniformly, the quality of the prepared glass fiber composite filter material is further improved, the resistance generated in the using process of the double-layer glass fiber composite filter material is reduced, the pressure drop of the filter material is obviously reduced, the air permeability of the glass fiber filter material is improved, the preparation process is simple, the automation degree is high, continuous production can be realized, and the production efficiency is greatly improved.

4. The invention provides a production system of a glass fiber composite filter material, which comprises production equipment of the glass fiber composite filter material and a sizing device, wherein the sizing device also comprises at least one of a dipping device, a spraying device or an overflow device, so that a complete set of system is formed, a small amount of water-based sizing agent is added, and the double-layer glass fiber composite filter material with higher tensile strength can be formed in one step.

5. According to the production system of the glass fiber composite filter material, the impregnation device is combined with production equipment of the glass fiber composite filter material, and the water-based sizing agent has a better effect of forming the protective layer on the surface of the glass fiber under the synergistic effect, so that the corrosion of the glass fiber under the use working condition is reduced, the binding force of the protective layer and the glass fiber filter material can be improved, and the integral tensile strength of the composite filter material is improved.

6. According to the production system of the glass fiber composite filter material, the second unwinding roller and the composite roller are arranged at one end of the impregnation device, which is far away from the head box, and are respectively used for unwinding and attaching an upper protective layer coiled material, so that a three-layer glass fiber composite filter material sequentially comprising an upper protective layer, a glass fiber base material layer and a lower protective layer can be formed by adding a small amount of water-based sizing agent in one step, a large amount of hot melt adhesive is not required to be coated in the whole process, the three-layer glass fiber filter material has high tensile strength, the filtering resistance and the filter material pressure drop of the filter material are obviously reduced on the basis of ensuring high tensile strength, the air permeability of the glass fiber filter material is improved, the service life is prolonged, the energy consumption is reduced, the production efficiency is greatly improved, and an external-slurry water-based sizing system is used, so that no irritant gas is released, and the production system is environment-friendly and pollution-free.

7. According to the production system of the glass fiber composite filter material, when the impregnation device is adopted, the generation of wrinkles of the glass fiber filter material in the impregnation process is further improved through the arrangement of the upper clamping net and the lower clamping net, and the filtration efficiency is improved.

8. According to the production system of the glass fiber composite filter material, provided by the invention, the fiber slurry is prepared firstly, then the protective layer is introduced into the forming net, the fiber slurry is conveyed to the protective layer, dehydration forming is carried out, the double-layer glass fiber composite filter material is obtained, then the water-based sizing agent is coated on the surface of the double-layer glass fiber composite filter material, and the double-layer glass fiber composite filter material with higher tensile strength is obtained after drying.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of a production apparatus for a glass fiber composite filter material in embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a production system of a glass fiber composite filter material in embodiment 2 of the present invention;

description of reference numerals:

1. a slurry delivery conduit; 2. a homogenizing roller; 3. a head box; 4. a molding zone; 5. a lower protective layer; 6. a lower protective layer coil; 7. a first unwinding roller; 8. a first driving roller; 9. a first vacuum dewatering box; 10. a second vacuum dewatering box; 11. a third vacuum dewatering box; 12. a second driving roller; 13. forming a net; 14. a third drive roller; 15. a double-layer glass fiber composite filter material; 16. a fourth vacuum dewatering box; 17. a fourth drive roller; 18. an upper clamping net; 19. a fifth driving roller; 20. a sixth drive roller; 21. a seventh driving roller; 22. an eighth drive roller; 23. a lower clamping net; 24. a ninth drive roller; 25. a spreader roll; 26. an impregnator; 27. covering a protective layer coiled material; 28. an upper protective layer; 29. a compound roller; 30. a fifth vacuum dewatering box; 31. three layers of glass fiber composite filter materials; 32. a second unwinding roller; 33. and a baffle plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. Wherein the solid content of the resin emulsion in the following embodiments refers to the mass percentage of solid matters in the resin emulsion in the total amount of the resin emulsion, and specifically refers to the mass percentage of the rest part of the resin emulsion after being dried at 105 +/-2 ℃ for 3 hours in the total mass of the resin emulsion before being dried;

the glue application amount is the mass percentage of the organic substances in the filter material in the total amount of the glass fiber base material, and for example 3-4, the non-woven fabric layer of the dried double-layer glass fiber composite filter material is removed to obtain the glass fiber base material layer, and the rest part of the glass fiber base material layer after being heated at 500 ℃ for 15min accounts for the mass percentage of the glass fiber base material before being heated; in examples 5 to 6, the upper protective layer and the lower protective layer of the dried three-glass fiber composite filter material were removed to obtain the glass fiber base material, and the remaining part of the glass fiber base material after heating at 500 ℃ for 15min accounted for the mass percentage of the glass fiber base material before heating.

For comparative examples 1 and 2, the mass percentage of the residual part of the dried single-layer glass fiber filter material after being heated at 500 ℃ for 15min before being heated is specifically the percentage of the mass of the single-layer glass fiber filter material before being heated.

Example 1

The production equipment of the glass fiber composite filter material shown in fig. 1 comprises a head box 3, a forming net 13, a first unwinding roller 7, a first dewatering device and a driving mechanism, wherein the head box 3 is used for providing fiber slurry required by the preparation of the glass fiber filter material.

One side of head box 3 is provided with the thick liquids import, and the thick liquids export has been seted up to the bottom of head box, head box 3 is located thick liquids import department and is connected with thick liquids pipeline 1, and thick liquids pipeline 1 goes up still to communicate there is the stuff pump, and fibre thick liquids pass through the stuff pump and flow in head box 3 through thick liquids pipeline 1.

The first dewatering device is tightly attached to the lower surface of the forming net 13, the forming net 13 is communicated with the slurry outlet, the first dewatering device is communicated with the slurry outlet through the forming net 13 and used for pumping water in the fiber slurry away, and the dewatered fibers are left on the forming net 13 to form the fiber filter material.

The first dewatering devices can adopt a vacuum dewatering box or a gravity dewatering box and can be arranged in a plurality of numbers, and the plurality of first dewatering devices are controlled by independent pneumatic valves; in this embodiment, 3 vacuum dewatering boxes are arranged below the forming wire 13, which are respectively a first vacuum dewatering box 9, a second vacuum dewatering box 10 and a third vacuum dewatering box 11, and the 3 vacuum dewatering boxes are all connected with a vacuum pumping device.

The driving mechanism is used for driving the forming net 13 to circularly pass through the slurry outlet, the fiber filtering material is continuously formed, the driving mechanism comprises two or more than two driving rollers which are arranged at intervals, the forming net 13 is arranged on the plurality of driving rollers in a surrounding mode, the number of the driving rollers is preferably 2-5, when the number of the driving rollers is two, the driving rollers are respectively a first driving roller 8 and a second driving roller 12, the first driving roller 8 is located on the upstream of the moving direction of the forming net 13, the second driving roller 12 is located on the downstream of the moving direction of the forming net 13 and is used for bringing the forming net 13 and the lower protective layer 5 from one side of the slurry outlet to the other side, and therefore fibers in the fiber slurry are left on the lower protective layer 5 under the action of the first dewatering device. In this embodiment, the number of the driving rollers is 3, and the forming device further comprises a third driving roller 14, wherein the forming net sequentially bypasses the first driving roller, the second driving roller and the third driving roller and encloses an accommodating space; the first dewatering device is arranged in the accommodating space and close to the head box, and a connecting line of the third driving roller 14, the first driving roller 8 and the second driving roller 12 forms a triangular structure.

The driving rollers include at least one main driving roller connected to the output end of the motor, and the other driving rollers are slave driving rollers, the driving motor drives the main driving roller to rotate when being started, and the main driving roller drives the slave driving roller to rotate under the driving of the forming net 13, for example, in this embodiment, the first driving roller 8 and the second driving roller 12 may be slave driving rollers, and the third driving roller 14 is the main driving roller.

A lower protective layer web 6 is wound around a first unwinding roll 7 for feeding a lower protective layer 5 between a headbox 3 and a forming wire 13, located adjacent to a first drive roll 8. Before use, one end of the lower protective layer coiled material 6 which needs to be stretched is placed on the forming net 13 wound on the upper surfaces of the first driving roller 8 and the second driving roller 12 and extends out of the right side of the second driving roller 12, and when the first driving roller 8 and the second driving roller 12 rotate, the lower protective layer coiled material 6 is driven to be conveyed towards the right side.

The first unwinding roller 7 can be directly connected with another driving motor, and can actively rotate under the driving action of the driving motor or passively rotate under the action of the lower protective layer 5, and the first unwinding roller 7, the first driving roller 8 and the second driving roller 12 respectively synchronously rotate regardless of the active rotation or the passive rotation; the present embodiment adopts an active rotation mode.

During the use, start driving motor and evacuating device, under driving motor's effect, third drive roller 14 initiative is rotated, drive forming network 13 and rotate, forming network 13 rotates and drives first drive roller 8 and second drive roller 12, start first unreel roller 7, the one end of protection layer coiled material 6 under the tensile, arrange the one end of protection layer coiled material 6 in the forming network 13 upper surface above first drive roller 8 and the second drive roller 12 down, and stretch out on the right side of second drive roller 12, realize introducing lower protection layer 5 between thick liquid case 3 and forming network 13, lower protection layer 5 advances along with the removal of forming network 13. Along with first drive roller 8 and second drive roller 12 drive forming net 13 and the thick liquids export of protective layer 5 through head box 3 down, simultaneously the fibre thick liquids in head box 3 flow downwards forward, fibre thick liquids are stayed on protective layer 5 down through the thick liquids export of head box 3, meanwhile, fibre thick liquids are in proper order at first vacuum dehydration case 9, dehydration shaping under the effect of second vacuum dehydration case 10 and third vacuum dehydration case 11, thereby form the integrated structure of the fine filter media of glass and protective layer, obtain the fine composite filter media 15 of double-deck glass.

In order to adjust the fluidity of the fiber slurry and improve the uniformity of the formed glass fiber filter material, the head box 3 or the head box 3 at the slurry outlet and the first dewatering device are obliquely arranged, and the inclination angle is 0-40 degrees, in the embodiment, the inclination angle is preferably 30 degrees.

In order to reduce the outflow of the fiber slurry from between the head box 3 and the forming wire 13, to improve the sealing between the head box 3 and the forming wire 13 and to reduce the loss of the fiber slurry, the present invention further comprises at least two baffles 33 extending from the head box 3 toward the forming wire 13, at least one of the baffles 33 being disposed adjacent to the first driving roller 8, and at least one of the baffles 33 being disposed adjacent to the second driving roller 12. The area where the fibre pulp flows from the first dewatering device is the forming zone 4, above the forming wire 13, where the fibre pulp is gradually solidified from a flowing state in the forming zone 4. In this embodiment, the polypropylene baffle has a certain elasticity, and can further improve the sealing property between the head box 3 and the forming wire 13.

In order to facilitate driving of the first unwinding roller, the tangent lines respectively tangent to the sides of the first unwinding roller and the first driving roller facing the headbox are first tangent lines, the tangent lines respectively tangent to the sides of the first driving roller and the second driving roller facing the headbox are second tangent lines, and an included angle between the first tangent line and the second tangent line is greater than or equal to 90 degrees, preferably 120 degrees and 180 degrees, and in this embodiment, 120 degrees is provided.

In addition, a pulp homogenizing roller 2 is arranged in the head box 3; the head box 3 is a single-layer head box, a two-layer head box or a multi-layer head box, the two-layer head box or the multi-layer head box can be used for preparing two-layer or more than two-layer glass fiber filter materials, the forming net 13 is a polyester forming net, and the lower protective layer 5 can be a non-woven fabric layer. The air permeability of the nonwoven fabric is 1000mm/s to 6000mm/s, and the air permeability of the nonwoven fabric used in this embodiment is 6000 mm/s.

Example 2

The production system of the glass fiber composite filter material shown in fig. 2 includes a dipping device in addition to the production equipment of the glass fiber composite filter material of embodiment 1.

The steeping device of this embodiment is steeping cell 26, including the steeping vat that supplies the fine filter media of glass to steep and the clamping device of setting in the steeping vat, clamping device includes centre gripping net 18 and lower centre gripping net 23, encircle respectively on at least two flooding drive rollers, the steeping drive roller of this embodiment all is provided with 3, it is the range of inverted triangle structure to go up centre gripping net 18 and lower centre gripping net 23, be fourth drive roller 17 respectively, fifth drive roller 19, sixth drive roller 20, seventh drive roller 21, eighth drive roller 22 and ninth drive roller 24, it leaves the clearance that supplies the fine filter media of glass to pass through to go up between centre gripping net 18 and the lower centre gripping net 23, go up centre gripping net 18 and lower centre gripping net 23 and can closely grasp the fine compound filter media 15 of the fine double-deck of glass of the production facility production of the compound filter media of glass, prevent that the steep in-process filter media from producing the fold. Wherein, the upper clamping net 18 and the lower clamping net 23 can adopt polyester clamping nets. One driving roller of the fourth driving roller 17, the fifth driving roller 19 and the seventh driving roller 21, and the rest driven rollers; one of the sixth driving roller 20, the eighth driving roller 22 and the ninth driving roller 24 is a driving roller and the other is a driven roller; the driving roller is connected with the output end of the motor, the driving roller is driven to rotate when the driving motor is started, and the driving roller rotates to drive the driven roller to rotate under the drive of the upper clamping net 18 or the lower clamping net 23.

In addition, still be provided with the roll of stretching 25 in the steeping cell for inject the direction of delivery of the compound filter media 15 of double-deck glass fiber after the centre gripping of last clamping-net 18 and lower clamping-net 23 centre gripping, prevent the fold, the compound filter media 15 of double-deck glass fiber is carried forward through roll of stretching 25.

In order to further reduce the water content of the double-layer glass fiber composite filter material 15, a second dewatering device is further arranged between the impregnating device and the head box 3, the second dewatering device can adopt a vacuum dewatering box or a gravity dewatering box, the second dewatering device is a fourth vacuum dewatering box 16 in the embodiment, in order to compound a protective layer again, a second unwinding roller 32 and a composite roller 29 can be arranged on one side of the impregnating device away from the head box 3, and are respectively used for unwinding and attaching an upper protective layer coiled material 27, and an upper protective layer 28 is compounded on the double-layer glass fiber composite filter material 15 to form a three-layer glass fiber composite filter material 31; in order to remove the redundant impregnating solution, ensure that the gap structure of the filter material is not blocked, and improve the bonding effect between different layer structures of the filter material, at least one third dewatering device is further arranged on one side of the impregnating device far away from the head box 3, the third dewatering device can adopt a vacuum dewatering box or a gravity dewatering box, and the second dewatering device is a fifth vacuum dewatering box 30 in the embodiment.

As another specific implementation manner of this embodiment, the dipping device in this embodiment may also be replaced by a spraying device or a glue overflow device, and the spraying device may adopt a spraying pipe or a spraying head for spraying the resin emulsion toward the double-layer glass fiber composite filter material 15.

Example 3

The embodiment provides a production technology of glass fiber composite filter material, which is prepared by adopting the production system of the glass fiber composite filter material provided by the embodiment 2 and comprises the following steps:

(1) dispersing glass microfibers with a beating degree of 39 degrees in water, and adjusting the pH value of the slurry to 3 by using sulfuric acid to obtain a fiber slurry with the mass percent of the glass microfibers being 0.5%;

(2) starting a driving motor and a vacuumizing device to enable a first driving roller 8, a second driving roller 12 and a third driving roller 14 to rotate and drive a polyester forming net 13 to rotate; the first unwinding roller 7 is driven to rotate to make the non-woven fabric (with air permeability of 1000mm/s and 50 g/m)²) Drawing the non-woven fabric onto a forming net 13, flatly spreading the non-woven fabric on the forming net 13, and advancing along with the rotation of the forming net 13; starting a pulp pump to enable the fiber pulp to flow into the head box 3, enabling the fiber pulp to flow towards the forming net 13 through a pulp outlet, gradually pumping away the moisture of the fiber pulp by the first vacuum dewatering box 9, the second vacuum dewatering box 10 and the third vacuum dewatering box 11, and leaving the fibers in the fiber pulp on the non-woven fabric on the forming net 13 to form a double-layer glass fiber composite filter material 15 with a lower protective layer 5;

(3) a dipping machine 26 is adopted to drive a fourth driving roller 17, a fifth driving roller 19, a sixth driving roller 20, a seventh driving roller 21, an eighth driving roller 22 and a ninth driving roller 24 to rotate, the double-layer glass fiber composite filter material is dipped in acrylic ester emulsion (provided by Toyobo northern science and technology (Beijing) Co., Ltd., trade name DLC-40) with the solid content of 2 percent for 20s, and the glue application amount is 5g/m²；

(4) The double layer obtained in the step (3)Drying the glass fiber composite filter material at 180 ℃ for 10min, and rolling to obtain 120g/m²The double-layer glass fiber composite filter material; the double-layer glass fiber composite filter material comprises a non-woven fabric layer and a glass fiber base material layer formed by glass microfibers, wherein the thickness of the glass fiber base material layer is 0.4 micrometer.

Example 4

The embodiment provides a production technology of glass fiber composite filter material, which is prepared by adopting the production system of the glass fiber composite filter material provided by the embodiment 2 and comprises the following steps:

(1) dispersing glass microfibers with a beating degree of 39 degrees in water, and adjusting the pH value of the slurry to 3 by using sulfuric acid to obtain a fiber slurry with the mass percent of the glass microfibers being 0.5%;

(2) starting a driving motor and a vacuumizing device to enable a first driving roller 8, a second driving roller 12 and a third driving roller 14 to rotate and drive a polyester forming net 13 to rotate; the first unwinding roller 7 is driven to rotate to make the non-woven fabric (with air permeability of 1000mm/s and 50 g/m)²) Drawing the non-woven fabric onto a forming net 13, flatly spreading the non-woven fabric on the forming net 13, and advancing along with the rotation of the forming net 13; starting a pulp pump to enable the fiber pulp to flow into the head box 3, enabling the fiber pulp to flow towards the forming net 13 through a pulp outlet, gradually pumping away the moisture of the fiber pulp by the first vacuum dewatering box 9, the second vacuum dewatering box 10 and the third vacuum dewatering box 11, and leaving the fibers in the fiber pulp on the non-woven fabric on the forming net 13 to form a double-layer glass fiber composite filter material 15 with a lower protective layer 5;

(3) the surface of the double-layer glass fiber composite filter material is uniformly sprayed with an acrylate emulsion (provided by northeast China science and technology (Beijing) Co., Ltd., trademark DLC-40) with the solid content of 5 percent by using a spray pipe, and the glue application amount is 5g/m²；

(4) Drying the double-layer glass fiber composite filter material obtained in the step (3) at 100 ℃ for 20min, and rolling to obtain 120g/m²The double-layer glass fiber composite filter material; the double-layer glass fiber composite filter material comprises a non-woven fabric layer and a glass fiber base material layer formed by glass microfibers, wherein the thickness of the glass fiber base material layer is 0.4 micrometer.

Example 5

The embodiment provides a production technology of glass fiber composite filter material, which is prepared by adopting the production system of the glass fiber composite filter material provided by the embodiment 2 and comprises the following steps:

(1) dispersing glass microfibers with a beating degree of 39 degrees in water, and adjusting the pH value of the slurry to 3 by using sulfuric acid to obtain a fiber slurry with the mass percent of the glass microfibers being 0.5%;

(2) starting a driving motor and a vacuumizing device to enable a first driving roller 8, a second driving roller 12 and a third driving roller 14 to rotate and drive a polyester forming net 13 to rotate; the first unwinding roller 7 is driven to rotate to make the non-woven fabric (with air permeability of 1000mm/s and 50 g/m)²) Drawing the non-woven fabric onto a forming net 13, flatly spreading the non-woven fabric on the forming net 13, and advancing along with the rotation of the forming net 13; starting a pulp pump to enable the fiber pulp to flow into the head box 3, enabling the fiber pulp to flow towards the forming net 13 through a pulp outlet, gradually pumping away the moisture of the fiber pulp by the first vacuum dewatering box 9, the second vacuum dewatering box 10 and the third vacuum dewatering box 11, leaving the fibers in the fiber pulp on the non-woven fabric on the forming net 13 to form a double-layer glass fiber composite filter material 15 with a lower protective layer 5, and pumping away the excess water through the fourth vacuum dewatering box 16;

(3) a dipping machine 26 is adopted to drive a fourth driving roller 17, a fifth driving roller 19, a sixth driving roller 20, a seventh driving roller 21, an eighth driving roller 22 and a ninth driving roller 24 to rotate, the double-layer glass fiber composite filter material is dipped in acrylic ester emulsion (provided by Toyobo northern science and technology (Beijing) Co., Ltd., trade name DLC-40) with the solid content of 2 percent for 20s, and the glue application amount is 5g/m²(ii) a The second unwinding roller 32 was started to wind the nonwoven fabric (air permeability of 6000mm/s, 20 g/m)²) The glass fiber composite filter material is drawn to the upper surface of the double-layer glass fiber composite filter material through a composite roller 29 to form a three-layer glass fiber composite filter material 31 with protective layers at the upper part and the lower part, and a fifth vacuum dehydration box 30 is used for sucking away the redundant glue solution in the filter material;

(4) drying the three-layer glass fiber composite filter material 31 obtained in the step (3) at 180 ℃ for 10min, and rolling to obtain 140g/m²The three-layer glass fiber composite filter material 31; the three-layer glass fiber composite filter material comprises a lower protective layer, a glass fiber base material layer formed by glass microfibers and an upper glass fiber base material layerAnd the protective layer is formed by a glass fiber base material layer, wherein the thickness of the glass fiber base material layer is 0.4 micrometer.

Example 6

The embodiment provides a production technology of glass fiber composite filter material, which is prepared by adopting the production system of the glass fiber composite filter material provided by the embodiment 2 and comprises the following steps:

(1) dispersing glass microfibers with a beating degree of 39 degrees in water, and adjusting the pH value of the slurry to 3 by using sulfuric acid to obtain a fiber slurry with the mass percent of the glass microfibers being 0.5%;

(2) starting a driving motor and a vacuumizing device to enable a first driving roller 8, a second driving roller 12 and a third driving roller 14 to rotate and drive a polyester forming net 13 to rotate; the first unwinding roller 7 is driven to rotate to make the non-woven fabric (with air permeability of 1000mm/s and 50 g/m)²) Drawing the non-woven fabric onto a forming net 13, flatly spreading the non-woven fabric on the forming net 13, and advancing along with the rotation of the forming net 13; starting a pulp pump to enable the fiber pulp to flow into the head box 3, enabling the fiber pulp to flow towards the forming net 13 through a pulp outlet, gradually pumping away the moisture of the fiber pulp by the first vacuum dewatering box 9, the second vacuum dewatering box 10 and the third vacuum dewatering box 11, leaving the fibers in the fiber pulp on the non-woven fabric on the forming net 13 to form a double-layer glass fiber composite filter material 15 with a lower protective layer 5, and pumping away the excess water through the fourth vacuum dewatering box 16;

(3) the surface of the double-layer glass fiber composite filter material is uniformly sprayed with an acrylate emulsion (provided by northeast China science and technology (Beijing) Co., Ltd., trademark DLC-40) with the solid content of 5 percent by using a spray pipe, and the glue application amount is 5g/m²(ii) a The second unwinding roller 32 was started to wind the nonwoven fabric (air permeability of 6000mm/s, 20 g/m)²) The glass fiber composite filter material is drawn to the upper surface of the double-layer glass fiber composite filter material through a composite roller 29 to form a three-layer glass fiber composite filter material 31 with protective layers at the upper part and the lower part, and a fifth vacuum dehydration box 30 is used for sucking away the redundant glue solution in the filter material;

(4) drying the three-layer glass fiber composite filter material 31 obtained in the step (3) at 180 ℃ for 10min, and rolling to obtain 140g/m²The three-layer glass fiber composite filter material 31; the three-layer glass fiber composite filter material comprises a lower protective layer and glass formed by glass microfibersThe glass fiber protective layer comprises a fiber substrate layer and an upper protective layer, wherein the thickness of the glass fiber substrate layer is 0.4 micrometer.

Comparative example 1

This comparative example provides a production technology of glass fiber composite filter material, adopts the production system basically the same with the production system of the glass fiber composite filter material that embodiment 2 provided to make, and the difference with embodiment 2 only lies in, does not include first unreeling roller, still includes the heat and scalds roller and chill roll, and all the other is the same, includes following step:

(1) dispersing glass microfibers with a beating degree of 39 degrees in water, and adjusting the pH value of the slurry to 3 by using sulfuric acid to obtain a fiber slurry with the mass percent of the glass microfibers being 0.5%;

(2) starting a driving motor and a vacuumizing device to enable a first driving roller 8, a second driving roller 12 and a third driving roller 14 to rotate and drive a polyester forming net 13 to rotate; starting a pulp pump to enable the fiber pulp to flow into the head box 3, enabling the fiber pulp to flow towards the forming net 13 direction through a pulp outlet, gradually pumping away the moisture of the fiber pulp by the first vacuum dewatering box 9, the second vacuum dewatering box 10 and the third vacuum dewatering box 11, and leaving the fibers in the fiber pulp on the forming net 13 to form a single-layer filter material;

(3) uniformly spraying an acrylate emulsion (provided by northeast China science and technology (Beijing) Co., Ltd., trademark DLC-40) with a solid content of 5% on the surface of the single-layer glass fiber filter material by using a spray pipe, wherein the glue application amount is 5g/m²Drying the single-layer filter material at 100 ℃ for 20 min;

(4) non-woven fabric surface coating 5g/m²The first non-woven fabric is obtained by hot melt adhesive (type: EVA 640, available from Yishang adhesive Co., Ltd., Fushan City) and the first non-woven fabric (1000mm/s, 50 g/m) is laid on the lower surface of the single-layer filter material²) Delivering into a hot roller for high-temperature bonding at 200 deg.C for 5s, and delivering into a cooling roller for cooling to obtain 125g/m²The double-layer glass fiber composite filter material; the double-layer glass fiber composite filter material comprises a non-woven fabric layer and a glass fiber base material layer formed by glass microfibers, wherein the thickness of the glass fiber base material layer is 0.4 micrometer.

Comparative example 2

This comparative example provides a production technology of glass fiber composite filter material, adopts the production system basically the same with the production system of the glass fiber composite filter material that embodiment 2 provided to make, and the difference with embodiment 2 only lies in, does not include first unreeling roller, still includes the heat and scalds roller and chill roll, and all the other is the same, includes following step:

(1) dispersing glass microfibers with a beating degree of 39 degrees in water, and adjusting the pH value of the slurry to 3 by using sulfuric acid to obtain a fiber slurry with the mass percent of the glass microfibers being 0.5%;

(2) starting a driving motor and a vacuumizing device to enable a first driving roller 8, a second driving roller 12 and a third driving roller 14 to rotate and drive a polyester forming net 13 to rotate; starting a pulp pump to enable the fiber pulp to flow into the head box 3, enabling the fiber pulp to flow to the forming net 13 through a pulp outlet, gradually pumping away the moisture of the fiber pulp by the first vacuum dewatering box 9, the second vacuum dewatering box 10 and the third vacuum dewatering box 11, leaving the fibers in the fiber pulp on the forming net 13 to form a single-layer filter material, and pumping away the excess water through the fourth vacuum dewatering box 16;

(3) uniformly spraying an acrylate emulsion (provided by northeast China science and technology (Beijing) Co., Ltd., trademark DLC-40) with a solid content of 5% on the surface of the single-layer glass fiber filter material by using a spray pipe, wherein the glue application amount is 5g/m²A fifth vacuum dehydration box 30 is used for pumping away the redundant glue solution in the filter material, and the single-layer filter material is dried for 10min at 180 ℃;

(4) the surfaces of the non-woven fabrics are coated with 5g/m²The hot melt adhesive (type: EVA 640, available from Yishang adhesive Co., Ltd., Fushan City) is prepared by respectively laying first non-woven fabrics (1000mm/s, 50 g/m) on the upper and lower surfaces of the single-layer filter material²) And a second nonwoven fabric (with an air permeability of 6000mm/s, 20 g/m)²) Delivering into a hot roller for high-temperature bonding at 200 deg.C for 5s, and delivering into a cooling roller for cooling to obtain 150g/m²The three-layer glass fiber composite filter material 31; the three-layer glass fiber composite filter material comprises a lower protective layer, a glass fiber base material layer formed by glass microfibers and an upper protective layer, wherein the thickness of the glass fiber base material layer is 0.4 micrometer.

Experimental example 1

The glass fiber composite filters prepared in examples 3 to 6 and comparative examples 1 to 2 were tested according to the following criteria.

The air filtration efficiency and resistance are measured by adopting a TSI 8130 type automatic filter material detector according to the regulations of GB 2626 plus 2006 self-priming filtration type particulate-proof respirator of respiratory protection products;

air permeability according to GB/T24218.15-2018 part 15 of test method for nonwoven fabrics for textiles: measurement of air permeability the air permeability was measured with an air permeability measuring instrument;

the tensile strength is measured by a universal testing machine according to the regulations of GB/T12914 + 2008 'determination of tensile strength of paper and paperboard';

the oil filtration efficiency and the filter material pressure drop at the end of the oil filtration test were determined using a multi-pass test rig according to the provisions of ISO 16889-.

The test results are shown in the following table:

as can be seen from the above table, compared to comparative example 1, examples 3 and 4 of the present invention can significantly reduce the filtration resistance, greatly increase the gas permeability, and reduce the pressure drop while maintaining higher tensile strength and filtration efficiency. Compared with the comparative example 2, the examples 5 and 6 of the present invention can remarkably reduce the filtration resistance, greatly improve the gas permeability, and reduce the pressure drop while maintaining the higher tensile strength and filtration efficiency. In addition, in example 5 of the present invention, the tensile strength of the filter material can be further improved by further optimizing the process conditions as compared with example 6.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.