Perforated flow guide air plate for wet spunlace drying

Abstract

The utility model discloses a perforated flow guide air plate for wet spunlace drying, which comprises an upper-layer flow guide air plate and a lower-layer flow guide air plate, the upper-layer flow guide air plate and the lower-layer flow guide air plate are both mounted in a drying oven, the upper-layer flow guide air plate is mounted at the upper part of the drying oven, and the lower-layer flow guide air plate is mounted at the lower part of the drying oven. And the lower-layer flow guide air plate is mounted at the lower part of the drying oven. Due to the unique penetrating type design, hot air can directly act on the surfaces of materials, the drying time is greatly shortened, and meanwhile energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of textile equipment, more particularly, relate to a kind of for wet water jet drying's perforated flow guide air baffle. BACKGROUND

[0002] In the production process of spunlace nonwoven fabric, although the web is pressed by calender to remove water after being spunlaced into cloth, a large amount of water is still adsorbed on the cloth, therefore, it is necessary to set a drying process in the production process of spunlace nonwoven fabric. In the traditional process, hot air drying method is often used, that is, hot air is used to dry the wet cloth on the surface of the conveying belt. This drying method often causes poor drying effect of nonwoven fabric, which cannot guarantee the product quality of nonwoven fabric.

[0003] The existing patent document CN109140975A (a new hot air circulation drying equipment for non-woven fabric production, January 4, 2019) describes a drying heating box. The non-woven fabric is distributed in the "S" shape on both sides of the heating box through the upper and lower guide rollers, so that the upper and lower surfaces of the non-woven fabric can be heated multiple times inside the drying box, which is beneficial to quickly remove the moisture of the non-woven fabric and improve the drying efficiency. At the same time, the hot air can be recycled, which reduces the energy consumption caused by the use of hot air. Since the non-woven fabric is distributed in the "S" shape, in order to improve the drying efficiency, a plurality of ceramic heating pipes need to be arranged in the heating box and spaced apart between the non-woven fabrics. The hot air generated by the ceramic heating pipes is used to dry the non-woven fabric. In actual industrial production process, due to the specific arrangement of the ceramic heating pipes and the non-woven fabric, the heating box often needs to have a larger volume, which is not conducive to the optimal configuration of industrial land and production line. At the same time, this method has low utilization rate of thermal efficiency, and the product has a hard hand feeling.

[0004] The current hot air penetration type dryer, such as "National Defense Textile Guide", No. 2005, No. 9, "Application of dryer in spunlace nonwoven fabric production", Liu Dongsheng, Donglun Technology Industry Co., Ltd. (China), describes a penetration type drying method. During the process of spunlace cloth passing through the drying cylinder cover along the rotating drum, the honeycomb structure is adopted on the surface of the rotating drum. The vacuum suction system in the rotating drum makes the steam hot air penetrate through the spunlace cloth into the drum and be sucked away. The water on the cloth evaporates and is taken away with the hot air sucked into the drum. The extracted air is sent to the circulation system, and after the water is removed, it is heated by the heat exchanger and then sent to the drying cover. It has been proved in practice that the drying efficiency of steam hot air penetration type is obviously higher than that of other hot air drying methods, and the product has a good hand feeling. However, in actual production process, it is still necessary to continuously provide steam hot air, which consumes a large amount of energy. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the problems in the prior art and provides a perforated flow guide air baffle for wet water jet drying.

[0006] The utility model discloses a perforated flow guide air board for wet water jet drying, including upper layer flow guide air board and lower layer flow guide air board, upper layer flow guide air board and lower layer flow guide air board all are installed in the oven, wherein upper layer flow guide air board is installed in the upper portion of oven, and lower layer flow guide air board is installed in the lower portion of oven.

[0007] In some embodiments, the upper layer flow guide air board and the lower layer flow guide air board are both made of stainless steel material, with a thickness of 1.5-2.0 mm, and a hydrophobic and corrosion-resistant surface.

[0008] In some embodiments, the upper layer flow guide air board and the lower layer flow guide air board are both arranged with a plurality of through holes, with the upper and lower layer through hole positions corresponding to each other, a hole diameter of 15-20 mm, and a hole spacing of 2.5-3 times the hole diameter.

[0009] In some embodiments, the flow guide air board between the two horizontally adjacent rows of holes on the upper layer flow guide air board is in a streamline raised structure, which is pressed and folded downward every 42.5-65 mm horizontally, with a width of 15-20 mm.

[0010] In some embodiments, the upper layer flow guide air board is installed at an inclination of 10°-15°, with the low end directly connected to the flow guide groove.

[0011] In some embodiments, the lower layer flow guide air board is installed horizontally.

[0012] Advantages: The utility model has the following advantages:

[0013] (1) The flow guide air board of the utility model is provided with a flow guide air board between the two horizontally adjacent rows of holes on the upper layer perforated flow guide plate, which is in a streamline raised structure and is installed at an inclination of 10°-15°, with the low end directly connected to the flow guide groove, to ensure smooth airflow and timely discharge of condensed water.

[0014] (2) The drying system of the utility model adopts a penetrating structure design, so that hot air can directly act on the surface of the material, greatly shortening the drying time and reducing energy consumption.

[0015] (3) The drying system of the utility model optimizes the hot air circulation system, ensures uniform distribution of the internal temperature of the oven, and improves drying uniformity and product quality. It is expected that the thermal efficiency of the new system will increase by 20%, the production efficiency will increase by 30%, the product qualification rate will increase by 5%, the energy consumption of the oven will decrease by 20%, and the production cost will be reduced accordingly.

[0016] (4) The drying system of the utility model, the wall body frame is constituted by frame, inner and outer panel and intermediate thermal insulation layer, the frame and the inner and outer panel are all stainless steel metal material, the frame is I-steel structure, the panel thickness is 0.8~1.2mm, the outer surface is smooth surface, and the inner surface is hydrophobic anticorrosive surface;The intermediate thermal insulation layer is glass fiber / rock wool composite needled felt, wherein the glass fiber fineness is 10~25μm, the length is 51~76mm, the content is 60%~80%, the rock wool fiber fineness is 7~15μm, the length is 51~76mm, and the content is 20%~40%, two kinds of fibers are opened and mixed, and then air-laid needled composite is carried out, the composite felt single-layer area density is 1000~1500g / m 2 , the thickness is 30~40mm, when assembling, 3~4 layers of composite are used according to the heat insulation requirement, the thickness after composite is controlled in 90~130mm, so as to keep the reasonable air static layer;

[0017] (5) The drying system of the utility model, the servo motor transmission eliminates the oven broken cloth leading to shutdown, improves the production efficiency;At the same time, using the oven intelligent control system, the drying parameters can be set and adjusted according to the characteristics of different materials, precise control is realized, and energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic view of the oven (drying system) of one embodiment of the utility model;

[0019] Figure 2 It is the wall body structure sectional view of one embodiment of the utility model;

[0020] Figure 3 It is the structure schematic view of the upper layer flow guide air baffle of one embodiment of the utility model;

[0021] Figure 4 It is the structure schematic view of the lower layer flow guide air baffle of one embodiment of the utility model;

[0022] Figure 5 It is the side sectional structure schematic view of the upper layer flow guide air baffle of one embodiment of the utility model;

[0023] Figure 6 It is the inclined installation schematic view of the upper layer flow guide air baffle of one embodiment of the utility model. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0025] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "internal", "external" and so on indicate the orientation or position relation of the shown orientation or position relation, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply that the indicated device or element must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the limitation of the utility model.

[0026] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "connection", "connect" should be broad sense, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0027] The utility model will be described further in detail below through specific embodiment and in conjunction with the drawings.

[0028] Example 1

[0029] In each drying unit of the drying system, generally, the upper and lower layers are respectively provided with perforated flow guide air plates, which are respectively referred to as upper layer flow guide air plate and lower layer flow guide air plate, and the lower layer flow guide air plate is close to the system air inlet, the air moisture content is very low, and no condensate water is generated, so that the conventional perforated flow guide air plate can be used, the plate body is made of stainless steel metal material, the thickness is 1.5-2.0 mm, and the surface is a hydrophobic corrosion-resistant surface. The plate is uniformly perforated vertically to the plate surface, the hole diameter is 15-20 mm, and the hole spacing is 2.5-3 times of the hole diameter, as shown in FIG. 1. Figure 4 The upper layer perforated flow guide air plate is close to the system air outlet, the air moisture content is high, and condensate water is generated, so that the conventional perforated flow guide air plate is slow in dehydration and low in drying efficiency, and a new type of structure needs to be designed and developed.

[0030] As shown in FIG. 2, Figure 1 , Figures 3 to 6 A perforated flow guide air plate for wet water jet drying, comprising an upper layer flow guide air plate 2 and a lower layer flow guide air plate 6, the upper layer flow guide air plate 2 and the lower layer flow guide air plate 6 are both installed in the oven, wherein the upper layer flow guide air plate 2 is installed at the upper part of the oven, and the lower layer flow guide air plate 6 is installed at the lower part of the oven.

[0031] In this embodiment, as shown in FIG. 3, Figure 3 and Figure 4As shown, the upper and lower layer flow guide wind plates 2 and 6 are made of stainless steel material, with a thickness of 1.5-2.0 mm, and the surfaces are hydrophobic and corrosion resistant. The upper and lower layer flow guide wind plates are aligned and perforated, with a hole diameter of 15-20 mm and a hole spacing of 2.5-3 times the hole diameter.

[0032] Further, in order to timely drain the water accumulated on the upper layer flow guide wind plate, the upper layer flow guide wind plate 2 includes a first plate body 21, and a plurality of first through holes 22 are distributed on the first plate body 21. The flow guide wind plate between the two adjacent rows of first through holes 22 in the transverse direction of the first plate body 21 is in a streamlined raised structure 23, and the first plate body 21 is installed at an inclination of 10°-15°, with the low end directly connected to the flow guide groove, so as to ensure smooth airflow and timely drainage of condensed water. The upper layer flow guide wind plate 2 is close to the system air outlet, and the air has a high moisture content, which will produce condensed water. The conventional perforated flow guide wind plate is slow in dehydration and low in drying efficiency, so an inclined structure is needed. Figure 3

[0033] Specifically, the first plate body 21 is made of stainless steel material, with a thickness of 1.8-2.2 mm and a hydrophobic and corrosion-resistant surface. A streamlined raised structure with a width of 15-20 mm is pressed and folded downward every 42.5-65 mm in the transverse direction, as shown in FIG. 4. Figure 5 The pressed and folded plate surface is fixed on a shelf, so that the angle 25 between the streamlined raised structure and the horizontal plane 24 is 10°-15°, as shown in FIG. 5. Figure 6 Each streamlined raised structure 23 is an inclined condensed water drainage channel, with the low end directly connected to the flow guide groove, so as to ensure smooth airflow and timely drainage of condensed water. The plate is uniformly perforated vertically to the horizontal plane, with a hole diameter of 15-20 mm according to the horizontal dimension. The first through holes 22 are located in the center of the two adjacent streamlined raised structures, and are aligned with the perforated position on the lower layer perforated flow guide wind plate.

[0034] In this embodiment, as shown in FIG. 6, the lower layer flow guide wind plate 6 is close to the system air inlet, and the air has a very low moisture content, which will not produce condensed water. Therefore, a conventional perforated flow guide wind plate can be used. The second plate body 61 is made of stainless steel material, with a thickness of 1.5-2.0 mm and a hydrophobic and corrosion-resistant surface. The second through holes 62 are uniformly perforated vertically to the plate surface, with a hole diameter of 15-20 mm and a hole spacing of 2.5-3 times the hole diameter. Figure 4 The structure of the drying oven (drying system) in which the upper and lower layer flow guide wind plates are installed is shown in FIG. 7. The drying system includes a wall frame 1, a thermal cycle supplementing and adjusting device 4, and a circulating fan. The wall frame 1 is provided with an upper layer flow guide wind plate 2, a rotating drum drying net 5, and a lower layer flow guide wind plate 6.

[0035] Figure 1

[0036] ​​​The upper layer of the flow guide wind board 2 is located above the rotating drum drying net 5, the lower layer of the flow guide wind board 6 is located below the rotating drum drying net 5, and the heat cycle supplementing and adjusting device 4 is arranged at the inlet and outlet of the drying oven respectively.

[0037] In this embodiment, in order to improve the heat preservation effect, as shown in Figure 2 The wall frame 1 includes a frame, an outer panel 11, an inner panel 13, and an intermediate heat preservation layer 12, and the intermediate heat preservation layer 12 adopts a glass fiber / rock wool composite needled felt structure.

[0038] Further, the frame is an I-shaped steel structure, the frame, the outer panel 11, and the inner panel 13 are all made of stainless steel material, the outer surface is a smooth surface, and the inner surface is a hydrophobic and corrosion-resistant surface, and the thickness of the outer panel 11 and the inner panel 13 is 0.8-1.2 mm.

[0039] Further, the fineness of the glass fiber in the intermediate heat preservation layer 12 is 10-25 μm, the length is 51-76 mm, and the content is 60%-80%, the fineness of the rock wool fiber is 7-15 μm, the length is 51-76 mm, and the content is 20%-40%, the two kinds of fibers are opened and mixed, and then air-laid and needled to be compounded, and the single-layer area density of the composite felt is 1000-1500 g / m 2 , and the thickness is 30-40 mm. During assembly, 3-4 layers of composite are adopted according to the heat insulation requirement, the thickness of the intermediate heat preservation layer after compounding is controlled to be 90-130 mm, so as to maintain a reasonable air static layer.

[0040] In this embodiment, as shown in Figure 1 The drying oven rotating drum drying net 5 is a direct action component of a hot air penetration type drying system for wet water jet, is in a cylindrical shape, is located in the middle of the drying oven, is a nickel-chromium alloy net with high thermal conductivity, the number of mesh holes of the net is 17-20 mesh, and the drying objects are in a wave shape and closely adhere to the surface of the drying oven rotating drum drying net 5 and pass through in turn.

[0041] In this embodiment, as shown in Figure 1 The system further includes a rotating drum hot air baffle 3, the rotating drum hot air baffle 3 is fixed to the upper part in the rotating drum drying net 5, is in a semicircular structure, is made of stainless steel material, and the thickness is 2.0-3.0 mm. The main function of the rotating drum hot air baffle 3 is to send the hot air heated by the hot air furnace into the drying area according to the predetermined direction, working temperature, and air volume, so as to complete the drying of the materials.

[0042] In this embodiment, as shown in Figure 1 The heat cycle supplementing and adjusting device 4 is arranged at the inlet and outlet of the drying oven respectively, the heat cycle supplementing and adjusting device 4 adopts a mature PLC control system, and the automation degree and operation convenience of the drying oven are improved.

[0043] In this embodiment, the circulating fan includes hot air exhaust circulating fan 7 and burner and oven air supply circulating fan 8. Hot air exhaust circulating fan 7 rotates the fan blade by motor, generates negative pressure effect, sucks the hot and humid air through the drum drying net 5 and discharges into the steam-water separator through the exhaust port. The filtered recovered hot air is re-sent to the air supply system to save energy. As shown, the hot air exhaust circulating fan 7 includes two, one of which is installed in the drum drying net 5, and the other is installed outside the oven. Figure 1

[0044] The burner and oven air supply circulating fan 8 is a component of the air supply system. The oven burner uses natural gas direct combustion heating. The added air is composed of fresh air supplemented by outdoor and recovered hot air after heating. The heated hot air is sent into the drying zone by the oven air supply circulating fan through the lower layer of guide air plate 6.

[0045] Embodiment 2

[0046] A specific method for perforated guide air plate for wet water jet drying, comprising:

[0047] In combination with Figure 1 Figure 1 , the wet water jet nonwoven material that needs to be dried enters the hot air penetration drying system at a design speed of 5-200 meters per minute after being dehydrated by the front negative pressure, and is fed into the oven drum drying net 5 by the guide roller group. The wrap angle of the wet water jet nonwoven material to the oven drum drying net 5 is 110°~150°. From the drying efficiency, the larger the wrap angle, the higher the efficiency, but at the same time, the wet strength of the wet water jet nonwoven material should be considered. For materials with high wet strength, the wrap angle to the oven drum drying net 5 can even be increased to 180°, but for materials with low wet strength, such as flushable wet wipe coiled material, the wrap angle to the oven drum drying net 5 should be small, otherwise it will break and cannot be continuously started.

[0048] ​The hot air exhaust circulating fan 7 and the burner and oven air supply circulating fan 8 of the circulating fan work in coordination to form a gradient pressure distribution area in which the internal pressure of the drum drying net 5 is less than the external pressure, so that the wet spunlace nonwoven material is adsorbed on the surface of the drum drying net 5. After being heated by the burner and oven air supply circulating fan 8, the air supply passes through the lower layer of the perforated air guide plate 6, the wet spunlace nonwoven material, and the lower half of the drum drying net 5, and then most of the air enters the inside of the drum drying net 5. At this time, the moisture in the material is partially taken away, the temperature of the hot air decreases from 110°~130° to 80°~100°, and the humidity increases from 10%~20% to more than 65%. This kind of humid and hot air is no longer suitable for drying the material, and needs to be discharged from the drying system by the help of the hot air exhaust circulating fan 7, and then re-enters the air supply system after external steam-water separation and filtration. The relatively dry and hot air continues to circulate in the system. Another part of the humid and hot air that does not enter the hot air exhaust circulating fan 7 rises to the upper layer of the perforated air guide plate 2, and the moisture condenses on the streamlined protrusions of the upper layer of the perforated air guide plate 2 and is discharged to the low end under the action of the installed inclined angle. The relatively humid and hot air with a humidity of 30%~40% is discharged from the drying system by the hot air exhaust circulating fan 7 at the top of the mechanism, and then re-enters the air supply system after external steam-water separation and filtration, so as to save energy. The oven drum air baffle 3 is installed in the upper half of the inside of the oven drum, which serves to close the hot air flow and form an effective circulation of hot air. The sealing part of the baffle is a non-working surface, and the wrap angle of the drum drying net 5 should match the wrap angle of the wet spunlace nonwoven material on the drum drying net 5.

[0049] In addition to the above-mentioned functions of penetrating air flow, condensing and discharging moisture, the upper layer of the perforated air guide plate 2 and the lower layer of the perforated air guide plate 6 also have the function of air flow rectification, so that the hot air penetrates the wet spunlace nonwoven material vertically, uniformly and orderly, and the moisture in the material evaporates rapidly. The burner and oven air supply circulating fan 8 and the hot air exhaust circulating fan 7 work in coordination to ensure that part of the hot air is taken away and discharged outside the machine, and part of the hot air is circulated, so that the drying system operates orderly and continuously, and the drying effect is continuously achieved.

[0050] The drying part on the production line is composed of several drying units as described above. When the wet spunlace nonwoven material passes through the working surface of a drum drying net 5 and has not yet reached the expected moisture regain, the material enters the next drying unit in sequence, and at the same time, the contact surface of the material and the drum drying net 5 is changed. After several times of alternating drying of the front and back surfaces, the material is sent out by the cloth guide roller and wound when the moisture regain of the material reaches the winding standard. The structures of the drying units are basically similar, but the drying temperature and the exhaust speed are gradiently configured, that is, the temperature of the drying unit that first contacts the material is higher, and the exhaust speed is faster. The temperature of the following drying units will gradually decrease, and the exhaust speed will also gradually decrease. The overall gradient design should meet the drying curve, which is beneficial to improve the drying efficiency and save energy.

[0051] The utility model discloses a kind of perforated flow guide air baffle for wet water-jet drying, its unique penetration design makes hot air can directly act on material surface, greatly shorten drying time, simultaneously reduce energy consumption.Innovative design oven internal structure, optimize hot air circulation system, ensure the uniform distribution of oven internal temperature, drying is uniform, improve product quality.It is expected that the thermal efficiency of new system will increase 20%, production efficiency is improved 30%, product qualification rate is improved 5%.At the same time, the energy consumption of oven will reduce 20%, production cost is reduced accordingly.Servo motor transmission prevents the stoppage of production caused by oven broken cloth, improves production efficiency.Using oven intelligent control system, drying parameter can be set and adjusted according to the characteristics of different materials, realize accurate control, reduce energy consumption.

[0052] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has been disclosed as above with preferred embodiment, however, it is not used to limit the utility model, any skilled person in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical scheme of the utility model by using the disclosed technical content, but as long as it does not deviate from the content of the technical scheme of the utility model, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the utility model still belongs to the scope of the technical scheme of the utility model.

Claims

1. A perforated airfoil for use in wet hydroentanglement drying, characterized by: It comprises an upper layer of wind guide plate (2) and a lower layer of wind guide plate (6), which are both installed in an oven, wherein the upper layer of wind guide plate (2) is installed at the upper part of the oven, and the lower layer of wind guide plate (6) is installed at the lower part of the oven.

2. A perforated flow guide airfoil for use in wet hydroentanglement drying according to claim 1, characterized in that: The upper layer of wind guide plate (2) and the lower layer of wind guide plate (6) are both made of stainless steel material, with a thickness of 1.5-2.0 mm, and a hydrophobic and corrosion-resistant surface.

3. A perforated air deflector for use in wet hydroentanglement drying according to claim 1, wherein: A plurality of through holes are arranged on the upper layer of wind guide plate (2) and the lower layer of wind guide plate (6), and the positions of the through holes of the upper layer correspond to those of the lower layer, with a hole diameter of 15-20 mm and a hole spacing of 2.5-3 times the hole diameter.

4. A perforated air deflector for use in wet hydroentanglement drying according to claim 1, wherein: The intermediate wind guide plate of the transversely adjacent two rows of holes of the upper layer of wind guide plate (2) is in a streamline raised structure (23), which is pressed and folded downward every 42.5-65 mm in the transverse direction, with a width of 15-20 mm.

5. A perforated air deflector for use in wet hydroentanglement drying according to claim 1, wherein: The upper layer of wind guide plate (2) is installed at an inclination of 10-15°, and the low end is directly connected to a flow guide groove.

6. A perforated air deflection plate for use in wet hydroentanglement drying according to claim 1, characterized in that: The lower layer of wind guide plate (6) is installed horizontally.

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