Continuous liquid-gas treatment deodorization system and method

Abstract

The present application provides a continuous liquid-gas treatment deodorization system and method. The continuous liquid-gas treatment deodorization system includes: a treatment liquid impregnation module, which includes an impregnation box and a treatment liquid impregnation module extrusion roller; and a first drying module, which includes a box, a roller, a hot air nozzle and a fan. The roller is rotatably arranged in the box, and air holes are arranged on the peripheral wall of the roller. The internal space of the roller is connected to the fan, so that the air holes produce an adsorption effect on the blank located on the outside of the peripheral wall of the roller. The hot air nozzle can blow hot air to the peripheral wall of the roller. The continuous liquid-gas treatment deodorization system can drive the blank to be processed accordingly in the impregnation box, the treatment liquid impregnation module extrusion roller and the first drying module in sequence. The continuous liquid-gas treatment deodorization method uses the above-mentioned continuous liquid-gas treatment deodorization system, and the deodorization method includes: immersing the blank in the treatment liquid and then extruding the blank to dehydrate the blank; hot air drying the blank.

Description

Technical Field

[0001] The present application belongs to the technical field of textile deodorization, and in particular to a continuous liquid-gas treatment deodorization system and method. Background Art

[0002] Polyurethane foam material has excellent cushioning and lightweight properties and is an important type of automotive interior material. Polyurethane foam material is generally compounded under interior textile fabrics or other surface materials, playing an important role in sound insulation, heat insulation, cushioning and protecting passengers in the car, and improving touch. But at the same time, polyurethane foam material is also an important source of total volatile organic compounds (TVOC), formaldehyde, and PM2.5 in the car. With the improvement of the overall environmental awareness of the whole people, if the newly produced polyurethane foam material is not specially treated, the composite textiles directly compounded will have a strong odor and it is difficult to meet the requirements of the OEM.

[0003] The current mainstream deodorization processes for polyurethane foam materials and their composite textiles are roughly divided into the following categories:

[0004] (1) Long-term storage allows pollutants such as odor and TVOC to evaporate freely or be removed by mechanical extrusion to accelerate air replacement deodorization. Patent CN106827365A discloses a method of mechanically compressing a sponge to remove sponge odor. The entire process takes 2 to 3 days. It is inefficient and discontinuous. For slowly released odor substances with larger molecular weight, the treatment effect is very limited.

[0005] (2) Heating the polyurethane foam material or its composite product, by increasing the temperature, causes the volatile substances and odors in the polyurethane foam material to evaporate quickly, thereby shortening the time for deodorization by exposure to the air. This is the current mainstream method. Many sponge composite factories perform high-temperature baking to deodorize the sponge after composite, but generally they can only reduce the odor by half a level, or at most by one level, and are prone to deterioration again, and the quality cannot be stabilized. Patent CN204894307U discloses a device for improving the odor and TVOC of sponges by heating. Considering that some substances have a large molecular weight and evaporate very slowly, it takes a long time to evaporate by heating alone. The entry and exit of these gases in the polyurethane molecules is a two-way process, and the improvement effect is limited.

[0006] (3) Removing odors by chemically reacting relevant solutions with polyurethane foaming materials. Patent CN109705394B analyzes in great detail the various possible sources and influencing factors of odors, TVOC, formaldehyde, and API in polyurethane sponges, as well as the physical and chemical properties of these pollutants and methods for their removal. It invented a treatment method that combines ethanol + water flow to remove odors, and then volatile escape replacement by high-temperature hot air circulation drying, which greatly improves the removal effect. However, this process requires the sponge to be immersed in a hot ethanol solution of a certain concentration for a long time, and it is vacuum-dried or spin-dried for dehydration. This process is a cyclical treatment process, which is not conducive to the treatment of roll-shaped continuous textiles. It also reduces efficiency.

[0007] The equipment involved in the current deodorization process mainly includes the following two categories:

[0008] See also Figure 1 , the prior art includes a flat-plate deodorizer, which is a long box mesh belt conveyor deodorizing device, and the mesh belt 11 has hot air circulation heating treatment equipment above and below. That is, the left and right conveying chain needle belts in the drying room of the setting machine are replaced with hollow front and rear conveying mesh belts, and the blank 12 is heated and deodorized by the hot air nozzles 13 in the upper and lower directions of the mesh belt when it lies on the mesh belt for transmission. The heating drying room of this equipment is very long (ranging from 20 meters to 40 meters, and the total length of the machine ranges from 36 meters to 50 / 60 meters, or even longer. A deodorizing device with this working mode in a factory in the industry is more than 100 meters long), and the temperature in the drying room is as high as 140°C to 160°C. Its problem is that it is too long, occupies too much space, and has a low processing speed and high energy consumption. Excessive high temperature and high temperature for a long time will cause thermal decomposition and oxidation of materials such as polyurethane, which will become a new source of odor. This is the most mainstream deodorizing equipment in automotive interior fabric factories. Most interior fabric factories use it. As the requirements of OEMs for interior fabric odor and pollutants such as TVOC become more and more stringent, the drying room tends to be longer and longer. However, it is still a pure physical deodorizing process, so the effect is not ideal. The equipment cost is high.

[0009] See also Figure 2 , the prior art also includes a continuous deodorization device, which is a standing oven. There are two rows of rollers 21 in the higher inner cavity of the oven, and the blanks 22 pass through the upper and lower rollers alternately. There is one or more hot air nozzles 23 on the upper and lower sides of the rollers, so that the hot air blows up and down in a cycle. The equipment uses the space height and the length of the heated object in the drying room to offset the length of the heating drying room. Therefore, the height of the whole machine is relatively high, but the length is relatively short. Because the upper and lower hot air nozzles 23 are far away from the blank 22, and the hot air flows parallel to the surface of the blank 22, the hot air penetration effect is much worse than that of the long box grid conveyor type deodorization equipment, so the deodorization effect is poor. There are also manufacturers of automotive interior composite fabrics that use this type of equipment, but it is not as common as the long box grid belt conveyor type deodorization equipment. Summary of the invention

[0010] In order to improve or solve at least one of the problems mentioned in the background technology, the present application provides a continuous liquid-gas treatment and deodorization system and method.

[0011] The continuous liquid-gas treatment deodorization system provided in the present application is used to remove the taste of blanks, and the continuous liquid-gas treatment deodorization system comprises:

[0012] A treatment liquid impregnation module, comprising an impregnation box and an extrusion roller of the treatment liquid impregnation module, wherein the impregnation box can be filled with treatment liquid, and the extrusion roller of the treatment liquid impregnation module can extrude the blank impregnated with the treatment liquid; and

[0013] The first drying module comprises a box, a roller, a hot air nozzle and a fan, wherein the roller is rotatably arranged in the box, the roller is a hollow structure and has a peripheral wall and an internal space, the peripheral wall of the roller is provided with air holes, the internal space of the roller is connected to the fan, and the fan can make the internal space of the roller a negative pressure space, so that the air holes produce an adsorption effect on the blank located outside the peripheral wall of the roller, and the hot air nozzle can blow hot air to the peripheral wall of the roller,

[0014] The continuous liquid-gas treatment and deodorization system can drive the blank to be processed accordingly in the impregnation box, the extrusion roller of the treatment liquid impregnation module and the first drying module in sequence.

[0015] In at least one embodiment, the hot air nozzles are arranged in a circumferential array on the outer side of the peripheral wall of the roller.

[0016] In at least one embodiment, a distance X between the hot air nozzle and the peripheral wall of the roller satisfies: 2 cm ≤ X ≤ 4 cm.

[0017] In at least one embodiment, the first drying module further comprises a drying module wind shielding portion, and the roller can rotate relative to the drying module wind shielding portion.

[0018] The wind shielding portion of the drying module is used to shield the air holes on the peripheral wall of the roller to prevent gas from passing through the shielded air holes.

[0019] In at least one embodiment, the drying module wind shield is disposed inside the roller, the drying module wind shield is a columnar structure, and the drying module wind shield includes a top plate and a connecting plate connected to the top plate.

[0020] On a cross section of the drying module wind shielding portion that is perpendicular to the axial direction of the drying module wind shielding portion, the cross section of the top plate is an arc shape.

[0021] In at least one embodiment, the continuous liquid-gas treatment and deodorization system further includes a second drying module, and the second drying module has the same structure as the first drying module.

[0022] The continuous liquid-gas treatment and deodorization system can drive the blank to be processed accordingly in the first drying module and the second drying module.

[0023] In at least one embodiment, the continuous liquid-gas treatment and deodorization system further includes a cleaning module, and the cleaning module includes:

[0024] a cleaning tank, wherein the cleaning tank can be filled with a cleaning liquid; and

[0025] A dehydrating roller of a cleaning module, wherein the dehydrating roller of the cleaning module can squeeze the blank after being immersed in the cleaning liquid,

[0026] The continuous liquid-gas treatment and deodorization system can drive the blank to be processed accordingly in sequence in the impregnation box, the treatment liquid impregnation module extrusion roller, the cleaning tank, the cleaning module dehydration roller and the first drying module.

[0027] In at least one embodiment, the continuous liquid-gas treatment and deodorization system further comprises:

[0028] A cloth feeding and unwinding module, which is used to unwind the blank;

[0029] an air cooling module, which is used for air cooling the blank; and

[0030] A cloth output and winding module is used to wind up the blank.

[0031] The continuous liquid-gas treatment and deodorization system can drive the blank to be processed in sequence in the cloth feeding and unwinding module, the treatment liquid immersion module, the first drying module, the air cooling module and the cloth discharging and winding module.

[0032] The continuous liquid-gas treatment deodorization method provided in the present application uses the above-mentioned continuous liquid-gas treatment deodorization system, and the method comprises:

[0033] After immersing the blank in the treatment liquid, the blank is squeezed to dehydrate the blank;

[0034] The blank is dried by hot air.

[0035] In at least one embodiment, the method further comprises:

[0036] After the blank is immersed in the treatment liquid and squeezed, and before the blank is dried by hot air, the blank is immersed in a cleaning liquid and squeezed to dehydrate the blank.

[0037] After the blank is dried by hot air, the blank is air-cooled.

[0038] The continuous liquid-gas treatment deodorization system provided by the present application generally includes a treatment liquid immersion module and a drying module, so that the blank can be dried by hot air after being continuously immersed in the treatment liquid. The high temperature causes the treatment liquid in the blank to expand, producing a "micro-explosion" flushing effect, which is conducive to the removal of pollutants and further removes related odors. The continuous liquid-gas treatment deodorization method provided by the present application uses the above system and also has the above effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The present invention shows a structural schematic diagram of a flat-plate deodorizer in the prior art.

[0040] Figure 2 The present invention shows a structural schematic diagram of a continuous deodorizing device in the prior art.

[0041] Figure 3 A schematic structural diagram of a continuous liquid-gas treatment and deodorization system according to an embodiment of the present application is shown.

[0042] Figure 4 A schematic diagram of the structure of the first drying module of the continuous liquid-gas treatment and deodorization system according to an embodiment of the present application is shown.

[0043] Description of Reference Numerals

[0044] 11 mesh belt; 12 blank; 13 hot air nozzle;

[0045] 21 roller; 22 blank; 23 hot air nozzle;

[0046] 3 cloth feeding and unwinding modules; 31 A-frame unwinding device; 32 double roller unwinding device;

[0047] 4 treatment liquid impregnation module; 41 impregnation box; 411 impregnation box conveying roller group; 412; box cover; 42 treatment liquid impregnation module squeezing roller; 421 pressure roller group;

[0048] 5 cleaning module; 51 cleaning tank; 511 cleaning tank conveying roller group; 52 cleaning module dehydration roller;

[0049] 6 first drying module; 61 box body; 62 roller; 63 hot air nozzle; 64 drying module wind shielding part; 641 top plate; 642 connecting plate;

[0050] 7 second drying module;

[0051] 8 air cooling module; 81 air cooling box; 82 air cooling roller; 83 air cooling module wind shielding part;

[0052] 9 cloth discharging and winding module; 91 A-shaped frame winding device; 92 double roller winding device;

[0053] 10 blanks;

[0054] 100 Speed ​​detection and synchronization control device DETAILED DESCRIPTION

[0055] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0056] See also Figure 3 The embodiment of the present application provides a continuous liquid-gas treatment deodorization system and method. The continuous liquid-gas treatment deodorization system may include a cloth feeding and unwinding module 3, a treatment liquid padding module 4, a cleaning module 5, a first drying module 6, a second drying module 7, an air cooling module 8, and a cloth discharging and winding module 9.

[0057] The modules of the continuous liquid-gas treatment and deodorization system can be arranged in a row, and the arrangement direction is parallel to the travel direction of the blank 10. The axes of the rollers (described later) in each module are parallel, and the axes are perpendicular to the travel direction of the blank 10. The blank 10 can be a polyurethane sponge composite fabric, wall cloth, etc.

[0058] Next, each module is introduced in turn.

[0059] The cloth feeding and unwinding module 3 may include an A-frame unwinding device 31 and / or a double-roller unwinding device 32. The blank 10 of the A-frame package can be actively unwound by the A-frame unwinding device 31, and the blank 10 of the ordinary package can be actively unwound by the double-roller unwinding device 32. The operator can select the corresponding unwinding method according to the type of the blank 10. For example, when the blank 10 is a polyurethane sponge composite fabric, it can be actively unwound by the A-frame unwinding device 31; when the blank 10 is a relatively thinner and softer single-layer fabric, it can be actively unwound by the double-roller unwinding device 32. The A-frame unwinding device 31 and the double-roller unwinding device 32 are existing devices and will not be described in detail in this application.

[0060] The treatment liquid padding module 4 may include a dip tank 41 and a treatment liquid padding module squeezing roller 42 .

[0061] The inside of the impregnation box 41 can be filled with a processing liquid such as ethanol, which is used to dissolve the relevant pollutants in the blank 10. The pollutants can be replaced and removed in the subsequent cleaning and drying steps (described later), thereby removing the taste of the blank 10.

[0062] A dipping box conveying roller group 411 may be provided in the dipping box 41. The dipping box conveying roller group 411 may include an upper and lower layer of conveying rollers. The liquid level of the treatment liquid may be located between the upper and lower layers of conveying rollers, so that the blank 10 can pass through the liquid surface multiple times, alternating between the treatment liquid and the air, that is, the blank 10 can be immersed in the treatment liquid and exposed to the air multiple times in the dipping box 41, and the blank 10 can be repeatedly rinsed.

[0063] Theoretically, the more times the blank 10 passes through the liquid surface, the longer the path, the longer the blank 10 is immersed, and the cleaner the pollutants are washed, which is conducive to improving the deodorization effect. However, at the same speed, the solution resistance and the friction resistance of the roller will increase, and it will be more difficult for the blank 10 to maintain mechanical properties. In addition, a larger box volume is required, more heat dissipation is required, more treatment liquid is contained in the box, and more waste is caused by residual treatment liquid, which is more costly. After comprehensive calculations, the application recommends two to four soaking processes, with the blank 10 going up and down as one soaking process. Figure 3 Two dipping steps are shown in FIG.

[0064] The top of the dipping box 41 may be provided with a temperature control device and a box cover 412. The temperature control device may adjust the temperature of the treatment liquid. The box cover 412 may play a heat preservation role and may also prevent the treatment liquid such as ethanol from volatilizing and contaminating the operating space.

[0065] An overflow port may be provided on the side wall of the immersion box 41 to prevent the height of the treatment liquid from being too high. A feeding pipe may be provided in the immersion box 41, through which the treatment liquid is added to the immersion box 41, and the feeding pipe may be a stainless steel pipe with holes. Furthermore, the mouth of the feeding pipe may be directed toward the blank 10 to increase the flushing effect. An emptying pipe and an emptying valve may be provided on the bottom surface of the immersion box 41 so as to empty the liquid in the immersion box 41. The material of the inner wall of the immersion box 41 may be stainless steel, such as 304 or 316 stainless steel.

[0066] The treatment liquid impregnation module extrusion roller 42 is used to extrude the blank 10. The treatment liquid impregnation module extrusion roller 42 may include a relatively arranged pressure roller group 421. After the blank 10 is impregnated with the treatment liquid, it is squeezed by the pressure roller group 421, so that the treatment liquid can enter the interior of the blank 10 and contact the pollutant particles inside the blank 10.

[0067] The pressure roller group 421 may include rubber pressure rollers arranged upper and lower, and the treatment liquid immersion module extrusion roller 42 may also include a driving system capable of controlling one of the pressure rollers of the pressure roller group 421 to move radially. The driving system can change the radial spacing between the two pressure rollers of the pressure roller group 421 to control the pressure of the rubber pressure roller, which can control the degree of liquid extrusion and adjust the travel speed of the blank 10 in the system, thereby facilitating the synchronization of the speed of the blank 10 at various positions in the system.

[0068] The treatment liquid impregnation module 4 may also include a treatment liquid circulation system, which may include an overflow recovery filter barrel and a feed barrel. The feed barrel is used to provide treatment liquid for the impregnation box 41. A heating device may be provided in the feed barrel, and the heating device makes the temperature of the treatment liquid in the feed barrel controllable. The heat source may be high-temperature hot water, steam, etc. One to three filter layers may be provided in the overflow recovery filter barrel, and the waste liquid discharged from the impregnation box 41 may be discharged to the feed barrel after being filtered through the filter layer in the overflow recovery filter barrel. Liquid level gauges may be provided in the feed barrel and the overflow recovery filter barrel to monitor the liquid level.

[0069] An isolation cover can be set outside the treatment liquid impregnation module 4. Chemical materials such as ethanol may be exposed in the space at the treatment liquid impregnation module 4, and the chemical materials may pollute the air and affect the health of the operator. Therefore, an isolation cover can be set, and a vacuum fan can be used to form a negative pressure in this part of the space to prevent diffusion. The extracted air can be connected to the workshop air spray adsorption treatment equipment through a pipeline, and discharged after the treatment meets the standards. I will not go into details here.

[0070] The cleaning module 5 may include a cleaning tank 51 and a cleaning module dehydration roller 52 .

[0071] The cleaning tank 51 may be filled with a cleaning liquid such as water, and a cleaning tank conveying roller group 511 may be provided in the cleaning tank 51. The cleaning tank conveying roller group 511 may include upper and lower layers of conveying rollers, and the liquid level of the cleaning liquid may be located between the upper and lower layers of conveying rollers, so that the blank 10 can pass through the liquid surface multiple times, alternating between water and air, that is, the blank 10 can be immersed in the cleaning liquid and exposed to the air multiple times in the cleaning tank 51, and the blank 10 can be repeatedly rinsed. The cleaning module dewatering roller 52 can squeeze the blank 10, and the structure of the cleaning module dewatering roller 52 and the treatment liquid immersion module squeezing roller 42 may be the same, and this application will not repeat them.

[0072] The blank 10 is rinsed by the cleaning module 5 before drying to dilute the treatment liquid, thereby preventing dangerous situations such as explosion caused by substances such as ethanol in the subsequent heating and drying steps.

[0073] See also Figure 4 The first drying module 6 includes a box body 61, a roller 62, a hot air nozzle 63, a drying module wind shielding portion 64, a fan, and a heating system.

[0074] The roller 62 is rotatably disposed in the box 61. The roller 62 may be a hollow structure having a peripheral wall and an internal space, one of the two axial ends of the roller 62 is closed, and the other end is connected to the fan, and air holes are disposed on the peripheral wall of the roller 62.

[0075] The inner space of the roller 62 can be connected to a fan, which makes the inner space of the roller 62 a negative pressure space, so that the air holes can produce an adsorption effect on the blank 10 located on the outer side of the peripheral wall of the roller 62.

[0076] The hot air nozzles 63 can be arranged in a circumferential array outside the peripheral wall of the roller 62, and the hot air nozzles 63 face the peripheral wall of the roller 62. When the blank 10 is located on the peripheral wall of the roller 62, the air blown by the hot air nozzles 63 can be directed toward the blank 10, so that the blank 10 is fixed on the peripheral wall of the roller 62 by being blown from outside and sucked from inside. When the roller 62 rotates, the blank 10 is driven to move forward.

[0077] If the thickness of the blank is ignored, the distance X between the hot air nozzle 63 and the peripheral wall of the roller 62 can be 2 cm to 4 cm, which is much smaller than the distance range between the nozzle and the conveyor belt in the common long box mesh belt conveyor deodorization equipment in the prior art (for example, 8 cm to 15 cm). Figure 1 In the prior art, the hot air nozzle 13 blows in opposite directions, and the blank 12 cannot be close to the mesh belt 11. Therefore, in order to avoid contact between the blank 12 and the hot air nozzle 13, a certain distance is required between the hot air nozzle 13 and the blank 12. Figure 3 In the present application, the wind flow directions do not conflict (blowing outside and sucking inside), so that the blank 10 can be firmly fixed on the roller 62, and the distance between the hot air nozzle 63 and the blank 10 can be relatively close, thereby improving the hot air replacement efficiency and avoiding the waste of heat energy.

[0078] The larger the ratio of the opening area of ​​the air holes set on the peripheral wall of the roller 62 to the peripheral wall area of ​​the roller 62, the smaller the resistance to hot air passing through, the better the negative pressure suction generated by the fan, the larger the air volume penetrating the blank 10, and the faster the pollutants are replaced. In the axial direction of the roller 62, the air holes do not exceed the blank 10 (for example, when there are multiple air holes in the axial direction, the air holes at both ends are also covered by the blank 10) to avoid the air flowing through the air holes not covered by the blank 10 and causing the hot air short circuit phenomenon.

[0079] In the circumferential direction of the roller 62, in order to smoothly transfer the blank 10, the roller 62 has a circumferential wall that is not covered by the blank 10. In order to prevent the hot air short circuit phenomenon, a drying module wind shield 64 can be provided to cover the circumferential wall of the roller 62 that is not covered by the blank 10. The drying module wind shield 64 can be fixedly provided, and the roller 62 can be rotated relative to the drying module wind shield 64. The covered circumferential wall can be the inner circumferential wall or the outer circumferential wall of the roller 62. For the convenience of setting, the drying module wind shield 64 can be provided inside the roller 62 to cover the inner circumferential wall of the roller 62 to prevent the gas from passing through the corresponding air holes.

[0080] The drying module wind shield 64 may be a columnar structure, which includes a top plate 641 and a connecting plate 642 connected to the top plate 641. On a cross section of the drying module wind shield 64 perpendicular to the axial direction of the drying module wind shield 64, the cross section of the top plate 641 is an arc shape, and the cross section of the drying module wind shield 64 may be a fan shape.

[0081] On the premise that the wind shield 64 of the drying module does not affect the rotation of the roller 62, the top plate 641 can be as close to the inner wall of the roller 62 as possible to cover part of the area of ​​the roller 62, so that the wind shield 64 of the drying module can cover part of the air holes. On the cross section of the roller 62 perpendicular to its axial direction, the angle of the arc corresponding to the area of ​​the blank 10 covering the roller 62 can be not less than 180°, preferably not less than 270°, to improve the use efficiency of the roller. The angle corresponding to the arc of the area covered by the top plate 641 on the roller 62 can be equal to or slightly greater than the difference between 360° and the angle of the wrapping angle, so that the air holes on the roller 62 are completely covered, thereby avoiding the phenomenon of hot air short circuit.

[0082] The diameter of the roller 62 can be 80 cm to 120 cm, preferably 100 cm. If the volume is too large, the equipment cost will increase and the power requirement of the fan will be higher. If the volume is too small, it will be inconvenient to install the drying module wind shield 64, and if the circumference of the roller 62 is too short, the amount of hot air heating and replacement of pollutants will not be sufficient.

[0083] Furthermore, the fan may include an exhaust hole, and a butterfly valve may be installed at the exhaust hole for exhaust gas. Slit channels may be provided on both sides of the box 61 for the blank 10 to enter and exit the box 61. The number of rollers 62 in the box 61 may be 2 to 6, preferably 4. A heat preservation layer may be provided on the outside of the box 61 to prevent temperature loss.

[0084] The heating system can heat the wind. The heating method can be the most economical and heat-efficient natural gas direct combustion method. Thermocouples can be installed in the fan to detect the temperature of the hot wind.

[0085] The blower fan can be provided with only one, and the wind can be sent to the hot air nozzle 63 again after being sucked out from the roller 62, so that the wind path is circulated. Of course, two blowers can also be provided, sucking the roller 62 and blowing air to the hot air nozzle 63 respectively.

[0086] Exemplarily, the blank 10 is a sponge, the sponge includes pores and an amorphous region, and the treatment liquid in the treatment liquid padding module 4 includes ethanol. After the ethanol padding treatment, the amorphous region and pores of the sponge contain ethanol. When the sponge is dried in the drying module, it is quickly heated by high-temperature hot air, such as 100°C, and the boiling point of ethanol is 78°C, so that the ethanol can be quickly vaporized, and the volume increases thousands of times, impacting the pollutant particles. In addition, the liquid water in the amorphous region of the sponge also evaporates rapidly, further impacting the pollutant particles. The pollutant particles diffuse from the amorphous region to the pores, and are then replaced and removed by the hot air.

[0087] The drying module not only undergoes a simple physical process in which the sponge is heated to cause the pollutants to migrate, displace and be removed, but also accelerates the diffusion and displacement removal process of treatment liquids such as ethanol. In particular, due to the extremely rapid heating, the components of the treatment liquid (ethanol and water) evaporate rapidly in the amorphous area inside the sponge, and the vaporization volume increases dramatically, forming a micro-explosion impact mixing reaction diffusion mechanism, which allows pollutants that are sticky, difficult to diffuse and slowly vaporize to be discharged smoothly.

[0088] The second drying module 7 can have the same structure as the first drying module 6. The secondary drying and deodorization by the second drying module 7 can further heat, diffuse, migrate and replace the residual trace pollutants in the processed blank 10, especially for materials with low air permeability, which can ensure better deodorization effect.

[0089] Of course, if the deodorization effect is not required, only the first drying module 6 can be used. Generally speaking, after three levels of removal in the treatment liquid padding module 4, the cleaning module 5, and the first drying module 6, the odor level can be basically reduced by about 1.5-2 levels. Of course, the higher the original pollutant concentration in the sponge system, the higher the odor level that can be removed. The "odor level" can be the odor level caused by the materials used in the interior of the car measured according to the Volkswagen PV3900 odor test method. The term odor can be understood as the tendency of volatile components to release a perceptible odor after the material has been stored under certain temperature and climatic conditions for a specified period of time. The odor levels include 1-6 levels.

[0090] When only the first drying module 6 is used, the temperature of the hot air blown out can be set at 140°C to 160°C. If the first drying module 6 and the second drying module 7 are used for secondary drying and deodorization, the temperature T1 of the hot air blown out of the first drying module 6 can be set at 90°C to 110°C, and the temperature T2 of the hot air blown out of the second drying module 7 can be set at 110°C to 130°C. The temperature setting in the secondary drying is more gentle, and the physical and chemical properties of the blank are better protected.

[0091] The polyurethane macromolecules in the sponge will undergo hydrolysis reaction under humid and high temperature conditions to produce odor monomers. The working temperature of the first drying module 6 can be made relatively low to minimize the occurrence of the above hydrolysis reaction; in the second drying module 7, liquids such as water can be considered to be basically removed, and the hydrolysis reaction will not occur. Therefore, the working temperature of the second drying module 7 can be set higher than the working temperature of the first drying module 6.

[0092] Of course, the operating temperatures can be switched so that the operating temperature of the first drying module 6 is higher than the operating temperature of the second drying module 7 .

[0093] Generally speaking, the second drying module 7 can reduce the odor level by about 0.5-1 level.

[0094] Exemplarily, the air volume of the hot air nozzles in the first drying module 6 and the second drying module 7 can be set at 7 cubic meters per second to 16 cubic meters per second, the wind pressure of the fan can be set at 1000 Pa to 2000 Pa, and the rated power can be 11 kilowatts.

[0095] The air cooling module 8 is used to air cool the blank 10 after hot baking. The air cooling module 8 may include an air cooling box 81, an air cooling roller 82, an air cooling module wind shield 83, and a fan. The air cooling roller 82 is rotatably arranged in the air cooling box 81. The air cooling roller 82 may be a hollow structure, and air holes are arranged on the peripheral wall of the air cooling roller 82. The fan may create a negative pressure in the air cooling roller 82, so that the blank 10 may be adsorbed on the air cooling roller 82 through the air holes.

[0096] On the one hand, the pores of the high-temperature sponge after drying still contain a certain concentration of odor sources, and when they cool naturally, they will adhere to the surface of the pores through the principle of similar attraction of organic molecules, leaving residual odor. On the other hand, if the sponge is rolled up without being cooled, the sponge may decompose, and the decomposed small molecules will become the odor source. Therefore, during the process of the blank 10 rotating with the air-cooled roller 82, the pollutants in the blank 10 can be further replaced by the cold air, which can not only cool the blank 10 well, but also further remove the pollutants.

[0097] Similarly, the wind shielding part 83 of the air-cooling module can be arranged inside the air-cooling roller 82. The wind shielding part 83 of the air-cooling module is used to cover the air holes of the air-cooling roller 82 that are not covered by the blank 10, so as to avoid wasting the work of the fan and eliminate the suction force of the area on the blank 10, so that the blank 10 can move smoothly. Since the blank 10 is dry and clean at this time and is relatively low in temperature and non-corrosive, the material of the air-cooling roller 82 can be an ordinary steel plate made by winding. The airtightness requirement of the air-cooling box 81 is not large, and its sealing standard can be lower than the sealing standard of the box in the drying module.

[0098] Generally speaking, the air cooling module 8 can reduce the odor level by about 0.2-0.5 level.

[0099] The cloth output winding module 9 may include an A-frame winding device 91 and / or a double roller winding device 92. The operator may select a corresponding winding method according to the type of the blank 10. For example, when the blank 10 is a polyurethane sponge composite fabric, it may be actively wound by the A-frame winding device 91; when the blank 10 is a relatively thinner and softer single-layer fabric, it may be actively wound by the double roller winding device 92. The A-frame winding device 91 and the double roller winding device 92 are existing devices and will not be described in detail in this application.

[0100] The continuous liquid-gas treatment and deodorization system may also include a speed detection and synchronous control device 100. The speed detection and synchronous control device 100 may be arranged between the cloth feeding and unwinding module 3 and the treatment liquid immersion and padding module 4. The speed detection and synchronous control device 100 may also be arranged between the air cooling module 8 and the cloth output and winding module 9. By detecting the tension of the blank 10, the traveling speed of the blank 10 at this position is detected, and a reference index is provided for adjusting the unwinding speed of the cloth feeding and unwinding module 3 or the speed of the blank 10 at other positions of the system, so as to control the synchronous movement of the blank 10 at various positions of the system. The speed detection and synchronous control device 100 is an existing device and will not be described in detail in this application.

[0101] The continuous liquid-gas treatment and deodorization system may further include a cloth storage tank, for example, a U-shaped cloth storage tank. The cloth storage tank may be arranged at the cloth inlet unwinding module 3 and the cloth outlet rewinding module 9.

[0102] The continuous liquid-gas treatment deodorization method provided in the present application uses the above-mentioned continuous liquid-gas treatment deodorization system. The continuous liquid-gas treatment deodorization method may include the following steps:

[0103] After dipping the blank 10 into the treatment liquid, the blank 10 is squeezed to dehydrate the blank 10;

[0104] After dipping the blank 10 into the cleaning liquid, the blank 10 is squeezed to dehydrate the blank 10;

[0105] Hot air drying the blank 10; and

[0106] The blank 10 is air-cooled.

[0107] Of course, the deodorization step may also include unwinding, rewinding and other steps, which will not be described in detail in this application.

[0108] It is understood that when working normally, the travel speed of the blank 10 is the same at each position, and the travel speed can be 10 meters per minute. Compared with the technical solution mentioned in the background technology that the sponge is soaked in a hot ethanol solution of a certain concentration for a long time (e.g., 20 minutes-60 minutes), the blank processing speed of the present application is faster, and the treatment liquid in the treatment liquid padding module 4 has no time to diffuse and migrate pollutants, and the treatment liquid is only immersed in the blank 10. When the high-temperature drying step is performed later, the treatment liquid in the blank 10 is vaporized to replace pollutants with hot air. In terms of deodorization principle, the present application has significant innovations, which improves the blank processing efficiency.

[0109] In addition, the long box grid belt conveyor deodorization equipment in the prior art often requires a factory building of dozens of meters, which occupies a large space, requires many fans, and has serious heat energy loss. The roller-type hot air blowing outside and sucking inside design of the present application greatly saves space, the nozzle is closer to the blank, the temperature in the box where the roller is located is balanced, so that the blanks in the box are heated at the same temperature at all positions, the treatment liquid and the pollution source are evaporated by heat, forming a "micro-explosion" flushing and removal effect, and the deodorization effect is good.

[0110] In the present application, the range term A to B includes the two endpoints A and B. For example, the temperature can be set at 140°C to 160°C, which means that the temperature setting range a satisfies: 140°C≤a≤160°C.

[0111] The above is a preferred embodiment of the present application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A continuous liquid-gas treatment deodorization system for removing the taste of a blank (10), characterized in that: include: A treatment liquid impregnation module (4), comprising an impregnation box (41) and an impregnation module extrusion roller (42), wherein the impregnation box (41) can be filled with treatment liquid, and the impregnation module extrusion roller (42) can extrude the blank (10) impregnated with the treatment liquid; as well as The first drying module (6) comprises a box (61), a roller (62), a hot air nozzle (63) and a fan, wherein the roller (62) is rotatably arranged in the box (61), the roller (62) is a hollow structure and has a peripheral wall and an internal space, the peripheral wall of the roller (62) is provided with air holes, the internal space of the roller (62) is connected to the fan, and the fan can make the internal space of the roller (62) a negative pressure space, so that the air holes can produce an adsorption effect on the blank (10) located outside the peripheral wall of the roller (62), and the hot air nozzle (63) can blow hot air toward the peripheral wall of the roller (62). The continuous liquid-gas treatment and deodorization system can drive the blank (10) to be processed in sequence in the impregnation box (41), the treatment liquid impregnation module squeezing roller (42) and the first drying module (6). The first drying module (6) further comprises a drying module wind shielding portion (64), and the roller (62) is capable of rotating relative to the drying module wind shielding portion (64). The drying module wind shielding portion (64) is used to shield the air holes on the peripheral wall of the roller (62) to prevent gas from passing through the shielded air holes.

2. The continuous liquid-gas treatment and deodorization system according to claim 1 is characterized in that: The hot air nozzles (63) are arranged in a circular array on the outer side of the peripheral wall of the roller (62).

3. The continuous liquid-gas treatment and deodorization system according to claim 2 is characterized in that: The distance X between the hot air nozzle (63) and the peripheral wall of the roller (62) satisfies: 2 cm ≤ X ≤ 4 cm.

4. The continuous liquid-gas treatment and deodorization system according to claim 1, characterized in that: The drying module wind shield (64) is arranged inside the roller (62), the drying module wind shield (64) is a columnar structure, and the drying module wind shield (64) comprises a top plate (641) and a connecting plate (642) connected to the top plate (641). In the cross section of the drying module wind shielding portion (64) perpendicular to the axial direction of the drying module wind shielding portion (64), the cross section of the top plate (641) is in the shape of an arc.

5. The continuous liquid-gas treatment and deodorization system according to claim 1, characterized in that: The continuous liquid-gas treatment and deodorization system further comprises a second drying module (7), wherein the second drying module (7) has the same structure as the first drying module (6). The continuous liquid-gas treatment and deodorization system can drive the blank (10) to undergo corresponding treatment in the first drying module (6) and the second drying module (7).

6. The continuous liquid-gas treatment and deodorization system according to claim 1, characterized in that: The continuous liquid-gas treatment and deodorization system further comprises a cleaning module (5), wherein the cleaning module (5) comprises: a cleaning tank (51), wherein the cleaning tank (51) can be filled with a cleaning liquid; and A dehydrating roller (52) of the cleaning module, wherein the dehydrating roller (52) of the cleaning module is capable of squeezing the blank (10) soaked in the cleaning liquid, The continuous liquid-gas treatment and deodorization system can drive the blank (10) to be processed accordingly in sequence in the impregnation box (41), the treatment liquid impregnation module squeezing roller (42), the cleaning tank (51), the cleaning module dehydration roller (52) and the first drying module (6).

7. The continuous liquid-gas treatment and deodorization system according to claim 1, characterized in that: The continuous liquid-gas treatment and deodorization system also includes: A cloth feeding and unwinding module (3) for unwinding the blank (10); An air cooling module (8) for air cooling the blank (10); and A cloth discharging and winding module (9) is used to wind up the blank (10), The continuous liquid-gas treatment and deodorization system can drive the blank (10) to be processed accordingly in sequence in the cloth feeding and unwinding module (3), the treatment liquid immersion module (4), the first drying module (6), the air cooling module (8) and the cloth discharging and winding module (9).

8. A continuous liquid-gas treatment deodorization method, characterized in that: Using the continuous liquid-gas treatment and deodorization system according to any one of claims 1 to 7, the method comprises: After immersing the blank (10) in the treatment liquid, the blank (10) is squeezed to dehydrate the blank (10); The blank (10) is dried with hot air.

9. The continuous liquid-gas treatment deodorization method according to claim 8, characterized in that: The method further comprises: After the blank (10) is immersed in the treatment liquid and squeezed, and before the blank (10) is dried with hot air, the blank (10) is immersed in a cleaning liquid and squeezed to dehydrate the blank (10). After the blank (10) is dried by hot air, the blank (10) is air-cooled.

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