Intelligent circulating type wet tissue production line

Abstract

The invention relates to the technical field of material soaking and liquid recycling, in particular to an intelligent circulating type wet tissue production line. An intelligent circulation type wet tissue production line comprises a machine frame, a non-woven fabric unwinding structure, a precise soaking structure, a redundant liquid separation structure and a liquid recovery circulation structure are sequentially arranged on the machine frame in the non-woven fabric conveying direction, and the non-woven fabric unwinding structure is used for conveying non-woven fabric to the precise soaking structure; the precise soaking structure is used for achieving uniform soaking of the non-woven fabric, the redundant liquid separation structure is used for discharging redundant liquid on the soaked non-woven fabric, and the liquid recycling structure is used for recycling the redundant liquid, purifying the redundant liquid and enabling the purified redundant liquid to flow back to the precise soaking structure. The device has the following effects that the liquid recycling structure is designed to recycle, purify and reflow redundant liquid, so that the loss of raw materials is reduced from the source, the utilization rate of the raw materials is greatly increased, the pollution to water is reduced, and the environmental protection treatment cost of enterprises is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of material wetting and liquid recycling, and particularly relates to an intelligent circulating wet tissue production line. BACKGROUND

[0002] As a convenient and sanitary cleaning product, wet tissues are widely used in many fields such as daily life, medical treatment and industry. With the improvement of people's living standards and the continuous improvement of health requirements, the market demand for wet tissues continues to grow, which promotes the continuous development of wet tissue production technology and meets the diversified needs of different user groups.

[0003] In the traditional wet tissue production process, in order to realize the wetting of non-woven fabric, a spraying mode is usually adopted, liquid is sprayed on the non-woven fabric through a nozzle, and after wetting, a simple extrusion device is used to handle the excess liquid on the non-woven fabric.

[0004] However, the extruded liquid is directly discharged without setting a recycling structure, which on the one hand causes serious waste of raw materials, and on the other hand, the discharged liquid contains formula components, which will cause water pollution if directly discharged into the pipe network without treatment, thereby increasing the environmental protection treatment cost of enterprises. SUMMARY

[0005] In order to reduce the waste of raw materials, reduce the pollution to water, and reduce the environmental protection treatment cost of enterprises, the application provides an intelligent circulating wet tissue production line.

[0006] The intelligent circulating wet tissue production line provided by the application adopts the following technical scheme: a rack is provided, non-woven fabric unwinding structures, precise wetting structures, excess liquid separation structures and liquid recycling structures are sequentially arranged on the rack along the non-woven fabric conveying direction, the non-woven fabric unwinding structure is used to convey the non-woven fabric to the precise wetting structure, the precise wetting structure is used to realize uniform wetting of the non-woven fabric, the excess liquid separation structure is used to discharge the excess liquid on the wetted non-woven fabric, and the liquid recycling structure is used to recycle the excess liquid and then return the purified excess liquid to the precise wetting structure.

[0007] By adopting the above technical scheme, the liquid recycling structure is designed to "recycle-purify-return" the excess liquid, which reduces the loss of raw materials from the source, ensures the coordinated operation of the wetting and recycling processes, greatly improves the utilization rate of raw materials, reduces the pollution to water, and reduces the environmental protection treatment cost of enterprises.

[0008] Preferably, the precise wetting structure comprises a high-pressure micro-mist spraying assembly and a total liquid supply pipe, the high-pressure micro-mist spraying assembly comprises two groups of spraying heads symmetrically arranged on the upper and lower sides of the non-woven fabric, each group of the spraying heads is communicated with the total liquid supply pipe through a branch pipe, and a flow sensor and an electromagnetic valve are installed in series on the branch pipe.

[0009] By adopting the technical scheme, the symmetrical layout of the high-pressure micro-fog spraying assembly realizes uniform pre-wetting of both sides of the non-woven fabric, the spraying heads on the upper and lower sides are independently supplied with liquid through the branch pipes, and the liquid amount can be flexibly matched according to the thickness and material of the non-woven fabric through linkage adjustment of the flow sensor and the electromagnetic valve. The independent control of the branch pipes can also adjust the difference in the wetting requirements of the two sides of the non-woven fabric.

[0010] Preferably, the precise wetting structure further comprises a constant-temperature soaking tank, the constant-temperature soaking tank is located directly below the high-pressure micro-fog spraying assembly, the outer side of the tank body of the constant-temperature soaking tank is wrapped with a heating and heat preservation layer, a stirring assembly is fixedly installed on the inner bottom of the tank body of the constant-temperature soaking tank, and a liquid level sensor is embedded on the upper side wall of the tank body of the constant-temperature soaking tank.

[0011] By adopting the technical scheme, the constant-temperature soaking tank and the high-pressure micro-fog spraying assembly are arranged in a top-down correspondence, forming a progressive processing mode from pre-wetting to deep wetting, ensuring that the non-woven fabric fully absorbs the liquid, the heating and heat preservation layer can maintain the stability of the liquid temperature in the tank, reducing the probability of liquid formula failure caused by temperature fluctuation, the stirring assembly can prevent the precipitation of liquid components, and the real-time monitoring of the liquid level sensor can not only ensure the stability of the liquid level in the tank, but also maintain the uniformity of the liquid concentration, control the humidity error of the non-woven fabric after deep wetting, and significantly improve the quality consistency of the finished product.

[0012] Preferably, the excess liquid separation structure comprises a double-roller extrusion assembly, the double-roller extrusion assembly comprises a liquid collecting hopper and silicon rubber extrusion rollers symmetrically arranged above and below, the silicon rubber extrusion roller located on the upper side is connected to the rack through a lifting adjusting piece and can be positioned to slide, the liquid collecting hopper is arranged directly below the silicon rubber extrusion rollers and is used to receive the liquid squeezed out from the two silicon rubber extrusion rollers, and the liquid collecting hopper is connected in communication with the liquid recovery and circulation structure.

[0013] By adopting the technical scheme, the silicon rubber extrusion rollers can accurately control the roller spacing through the lifting adjusting piece, adapt to the extrusion force requirements of non-woven fabrics of different thicknesses, avoid damage to the fabric caused by rigid extrusion, the liquid collecting hopper receives the extruded liquid, quickly converges to the liquid recovery and circulation structure, reduces liquid dripping waste, and improves the liquid discharge efficiency.

[0014] Preferably, the excess liquid separation structure further comprises a negative pressure adsorption assembly, the negative pressure adsorption assembly comprises a negative pressure adsorption box and a vacuum pump, the negative pressure adsorption box is arranged on the rack, a conveying channel adapted to the non-woven fabric is formed in the negative pressure adsorption box, a negative pressure cavity is further formed in the negative pressure adsorption box, the inner wall of the conveying channel is uniformly provided with honeycomb-shaped adsorption holes, the adsorption holes are in communication with the negative pressure cavity, the negative pressure cavity is connected with the vacuum pump through a negative pressure pipe, and a negative pressure controller is installed on the negative pressure pipe.

[0015] By adopting the above technical scheme, the conveying channel of the negative pressure suction box is matched with the non-woven fabric, the honeycomb suction holes are communicated with the vacuum pump through the negative pressure cavity, and the precise pressure regulation of the negative pressure controller can effectively adsorb the residual liquid on the surface of the non-woven fabric, realize the secondary deep removal of the excess liquid, solve the problem of surface moisture after double-roller extrusion, and further improve the moisture control precision without damaging the non-woven fabric fibers.

[0016] Preferably, the liquid recovery circulation structure comprises a primary filter tank, a precision filter tank, an ultraviolet disinfection assembly and a constant-temperature liquid storage tank connected in sequence through pipelines, the primary filter tank is connected in communication with the excess liquid separation structure, the primary filter tank and the precision filter tank are used for multi-stage purification of the excess liquid, the ultraviolet disinfection assembly is used for disinfecting the purified excess liquid, and the constant-temperature liquid storage tank is used for backflow to the precise wetting structure.

[0017] By adopting the above technical scheme, the step-by-step processing of the primary filter tank, the precision filter tank and the ultraviolet disinfection assembly can remove impurities, odors and microorganisms in the excess liquid layer by layer, ensure that the purity of the recovered liquid meets the infiltration requirements, the constant-temperature liquid storage tank realizes stable storage and backflow of the recovered liquid, avoids secondary pollution of the liquid, greatly reduces the raw material cost, reduces wastewater discharge, and balances economic benefits and environmental benefits Preferably, at least one filter screen is fixedly installed in the primary filter tank from top to bottom, a liquid inlet at the top of the primary filter tank is connected in communication with the excess liquid separation structure, a liquid outlet at the bottom of the primary filter tank is connected in communication with a liquid inlet at the top of the precision filter tank through a pipeline, a plurality of activated carbon filter cartridges are detachably installed in the precision filter tank, the plurality of activated carbon filter cartridges are arranged side by side in the precision filter tank, and a liquid outlet at the bottom of the precision filter tank is connected in communication with the ultraviolet disinfection assembly.

[0018] By adopting the above technical scheme, the filter screen and the support net rack of the primary filter tank are combined, can efficiently intercept non-woven fabric fibers and large-particle impurities, avoid impurities from blocking subsequent pipelines or contaminating activated carbon filter cartridges, the support net rack enhances the load-bearing capacity of the filter screen and prolongs the service life of the filter screen, the plurality of parallel activated carbon filter cartridges of the precision filter tank design expands the adsorption area and improves the removal efficiency of odors and small pollutants, the detachable structure facilitates replacement of the filter cartridges, reduces maintenance costs, and makes the purity of the purified liquid meet the production requirements of food-grade wet wipes.

[0019] Preferably, the ultraviolet disinfection assembly comprises a sleeve type disinfection cavity and a plurality of ultraviolet lamp tubes, the ultraviolet lamp tubes are axially embedded in the sleeve type disinfection cavity along the sleeve type disinfection cavity, a plurality of the ultraviolet lamp tubes are arranged in a circumferential interval along the sleeve type disinfection cavity, each of the ultraviolet lamp tubes is provided with a high-transmittance quartz sleeve, one end of the sleeve type disinfection cavity is connected with a liquid outlet at the bottom of the precision filter tank, and the other end of the sleeve type disinfection cavity is connected with the constant-temperature liquid storage tank.

[0020] By adopting the above technical scheme, the circumferential arrangement of the ultraviolet disinfection assembly and the design of the quartz sleeve realize omnidirectional and efficient sterilization of the liquid, the plurality of ultraviolet lamp tubes are arranged in a circumferential interval along the cavity, and the axial extension installation mode ensures that the liquid flowing in the cavity can be fully irradiated by the ultraviolet light, the high-transmittance quartz sleeve protects the lamp tube from corrosion by the liquid and ensures the penetration of the ultraviolet light, thereby avoiding sterilization failure caused by damage to the lamp tube, and the sleeve type cavity structure has no sanitary dead angle, thereby preventing secondary pollution caused by liquid stagnation.

[0021] Preferably, the constant-temperature liquid storage tank is wrapped with a heating jacket, the heating jacket is electrically connected with a temperature controller, the constant-temperature liquid storage tank is fixedly provided with a concentration sensor at the top, a detection end of the concentration sensor extends into the liquid in the constant-temperature liquid storage tank, the rack is provided with a control system, a signal output end of the concentration sensor is electrically connected with the control system, the constant-temperature liquid storage tank is connected with a supplement pipe at the top, the supplement pipe is provided with an electromagnetic valve, and the electromagnetic valve is electrically connected with the control system.

[0022] By adopting the above technical scheme, the heating jacket of the constant-temperature liquid storage tank is linked with the temperature controller to ensure that the temperature of the recovered liquid is consistent with that of the constant-temperature soaking tank, thereby avoiding fluctuations in the soaking effect caused by temperature differences; the closed-loop control of the concentration sensor, the control system and the electromagnetic valve can realize real-time monitoring of the liquid concentration, automatic supplement of the original liquid, solve the hysteresis problem of manual detection of the concentration, improve the degree of automation of production, ensure the stability of the liquid performance flowing to the precise soaking structure, and ensure the uniformity of the quality of the finished product wet wipes.

[0023] Preferably, the stirring assembly comprises a stirring motor, a stirring shaft and stirring paddles, the stirring motor is arranged at the bottom of the constant-temperature soaking tank, the stirring shaft is coaxially connected with an output shaft of the stirring motor, and a plurality of the stirring paddles are arranged in a circumferential interval along the stirring shaft.

[0024] By adopting the above technical scheme, a plurality of stirring paddles are arranged in a circumferential interval along the stirring shaft, and the coaxial rotation of the stirring shaft can form a three-dimensional stirring flow field, thereby avoiding the deposition of components caused by the static liquid in the tank, greatly improving the stirring uniformity of the liquid in the constant-temperature soaking tank, ensuring the consistency of the non-woven fabric soaking, and adapting to the stirring requirements of different formula liquids.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Reduce raw material loss at the source, while ensuring the coordinated operation of the soaking and recycling processes, significantly improve raw material utilization, reduce water pollution, and lower the company's environmental protection costs; 2. The progressive treatment mode from pre-wetting to deep immersion ensures that the non-woven fabric fully absorbs the liquid, while the heated insulation layer can maintain the stable liquid temperature in the tank and reduce the probability of liquid formula failure caused by temperature fluctuations. 3. The excess liquid separation structure uses a stepped process involving a primary filter tank, a precision filter tank, and an ultraviolet disinfection component to remove impurities, odors, and microorganisms from the excess liquid layer by layer, ensuring that the purity of the recovered liquid meets the immersion requirements. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the overall structure from another perspective of this application; Figure 3 This is a cross-sectional schematic diagram of the overall structure of this application; Figure 4 yes Figure 1 A magnified view of part A in the middle; Figure 5 This is a cross-sectional schematic diagram of the overall structure of this application; Figure 6 This is a cross-sectional schematic diagram of a portion of the structure of this application.

[0027] Explanation of reference numerals in the attached drawings: 110, frame; 120, nonwoven fabric unwinding structure; 121, unwinding roller; 122, guide roller; 123, mounting bracket; 130, spray head; 131, branch pipeline; 132, main infusion pipe; 133, constant temperature soaking tank; 136, stirring assembly; 137, stirring motor; 138, stirring shaft; 139, stirring paddle; 140, double roller extrusion assembly; 141, silicone extrusion roller; 142, liquid collection hopper; 143, lifting adjustment component; 144, ball screw; 145, guide rail; 146, drive motor; 150, negative pressure suction... Components included: 151. Negative pressure adsorption box; 152. Vacuum pump; 153. Conveying channel; 154. Negative pressure chamber; 155. Adsorption hole; 156. Negative pressure pipe; 160. Liquid recovery and circulation structure; 161. Primary filter tank; 162. Precision filter tank; 163. Ultraviolet disinfection component; 164. Constant temperature liquid storage tank; 165. Filter screen; 167. Activated carbon filter element; 168. Heating jacket; 169. Replenishment pipe; 171. Sleeve-type disinfection chamber; 172. Ultraviolet lamp tube; 173. Quartz sleeve; 180. Variable frequency water pump; 190. Drain pipe. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] This application discloses an intelligent circulating wet wipe production line, which reduces raw material waste, water pollution, and environmental protection costs for enterprises.

[0030] refer to Figure 1 , Figure 2 and Figure 3 A smart circulating wet wipe production line includes a frame 110. Along the nonwoven fabric conveying direction, the frame 110 is sequentially equipped with a nonwoven fabric unwinding structure 120, a precision wetting structure, an excess liquid separation structure, a liquid recycling structure 160, and a control system. A PLC control cabinet for the control system is installed on one side of the frame 110. The PLC control cabinet is electrically connected to the sensors and actuators of each structure via wires, forming a centralized control link. Each structure is fixed to a pre-set installation position on the frame 110 with bolts to ensure overall stability. The nonwoven fabric unwinding structure 120 conveys the nonwoven fabric to the precision wetting structure, which ensures uniform wetting of the nonwoven fabric. The excess liquid separation structure removes excess liquid from the wetted nonwoven fabric. The liquid recycling structure 160 recovers excess liquid, purifies it, and returns it to the precision wetting structure. This reduces raw material loss at the source, ensures coordinated operation of the wetting and recycling processes, significantly improves raw material utilization, reduces water pollution, and lowers environmental protection costs for enterprises.

[0031] The nonwoven fabric unwinding structure 120 is located on the far left of the production line and includes an unwinding roller 121, a tension controller, a bearing seat, and a mounting bracket 123. The mounting bracket 123 is vertically fixed to the left end of the frame 110. The two ends of the unwinding roller 121 are connected to the mounting bracket 123 through the bearing seats. The axis of the unwinding roller 121 is perpendicular to the nonwoven fabric conveying direction. The tension controller consists of a tension sensor and a guide roller 122. The guide roller 122 is mounted on the right side of the unwinding roller 121 through the bracket to ensure that the nonwoven fabric can naturally bypass the guide roller 122 after being drawn out from the unwinding roller 121 and then be smoothly conveyed to the precision wetting structure on the right. The tension sensor is fixed on one side of the guide roller 122. The detection end of the tension sensor is in contact with the surface of the nonwoven fabric. The tension sensor is connected to the PLC control cabinet through a shielded wire, which can transmit the tension signal to the control system in real time and sense the fabric tension in real time.

[0032] The precision wetting structure includes a high-pressure micro-mist spray assembly, a main infusion pipe 132, and a constant-temperature soaking tank 133. The high-pressure micro-mist spray assembly includes two sets of spray heads 130 symmetrically distributed on the upper and lower sides of the non-woven fabric. Each set of spray heads 130 is connected to the main infusion pipe 132 via a branch pipe 131. A flow sensor and a solenoid valve are connected in series on the branch pipe 131. The main infusion pipe 132 is arranged along the side wall of the frame 110, with one end connected to the liquid recovery and circulation structure 160, and the other end supplying liquid to the upper and lower spray heads 130 via the branch pipe 131. The flow sensor and solenoid valve are connected to the PLC control cabinet via wires, and can receive control signals to adjust the spray state. The constant-temperature soaking tank 133... Located directly below the high-pressure micro-mist spraying component, the constant temperature soaking tank 133 has a rectangular structure with an open top. The length of the constant temperature soaking tank 133 is aligned with the non-woven fabric conveying direction, and the width of the constant temperature soaking tank 133 matches the coverage width of the spraying component to ensure that the non-woven fabric can completely fall into the liquid in the tank. A liquid inlet is provided on one side of the constant temperature soaking tank 133, which is connected to the liquid recovery and circulation structure 160 through a pipe to achieve liquid replenishment. The outside of the constant temperature soaking tank 133 is wrapped with a heating and insulation layer, and an electric heating tube is also embedded between the heating and insulation layer and the constant temperature soaking tank 133 to maintain a stable liquid temperature in the tank and reduce the probability of liquid formula failure caused by temperature fluctuations.

[0033] In addition, a stirring assembly 136 is fixedly installed at the bottom of the constant temperature soaking tank 133. The stirring assembly 136 includes a stirring motor 137, a stirring shaft 138, and stirring paddles 139. The stirring motor 137 is located at the bottom of the constant temperature soaking tank 133. The stirring shaft 138 and the output shaft of the stirring motor 137 are coaxially connected. Multiple stirring paddles 139 are provided and are spaced apart circumferentially along the stirring shaft 138. The stirring motor 137 is connected to the PLC control cabinet through wires and its start, stop, and speed are controlled by the control system. A liquid level sensor is embedded in the upper part of the side wall of the constant temperature soaking tank 133. The probe end of the liquid level sensor extends into the liquid in the tank. The liquid level sensor is connected to the control cabinet through a signal line to provide real-time feedback of the liquid level signal. The stirring assembly 136 can prevent the liquid components from settling. With the real-time monitoring of the liquid level sensor, it can ensure the stability of the liquid level in the tank and maintain the uniformity of the liquid concentration, thus controlling the humidity error after the non-woven fabric is deeply immersed.

[0034] refer to Figure 1 , Figure 2 and Figure 4The excess liquid separation structure includes a double-roller extrusion assembly 140 and a negative pressure adsorption assembly 150. The double-roller extrusion assembly 140 includes symmetrically arranged upper and lower silicone extrusion rollers 141 and a liquid collection hopper 142. The silicone extrusion rollers 141 are installed on the right side of the constant temperature soaking tank 133, and the axis of the silicone extrusion rollers 141 is perpendicular to the nonwoven fabric conveying direction. After the nonwoven fabric is drawn out from the soaking tank, it directly enters between the upper and lower silicone extrusion rollers 141. The liquid collection hopper 142 is installed below the extrusion rollers and has a conical structure. The top opening covers the length of the extrusion rollers, and the bottom of the liquid collection hopper 142 has a liquid outlet, which is connected to the liquid recovery and circulation structure 160 through a liquid guide pipe to transport the extruded liquid to the liquid recovery and circulation structure 160. The recycling structure 160 includes an upper silicone extrusion roller 141 connected at both ends to a lifting adjustment component 143 via bearing seats. The lifting adjustment component 143 includes a ball screw 144, a slider 145, and a drive motor 146. The drive motor 146 is connected to a PLC control cabinet via wires. The PLC system can control the lifting adjustment components 143 at both ends of the upper silicone extrusion roller 141 to synchronously adjust the height of the upper silicone extrusion roller 141 to change the distance between the two silicone extrusion rollers 141. The lower silicone extrusion roller 141 is fixed at both ends to the frame 110 via bearing seats, and is vertically aligned with the upper silicone extrusion roller 141. refer to Figure 1 , Figure 2 and Figure 5 The negative pressure adsorption assembly 150 includes a negative pressure adsorption box 151 and a vacuum pump 152. The negative pressure adsorption box 151 is a rectangular cavity structure, mounted on the frame 110 and located to the right of the double roller extrusion assembly 140. A conveying channel 153 adapted to the nonwoven fabric is provided on the negative pressure adsorption box 151. The conveying channel 153 is aligned with the nonwoven fabric output direction of the extrusion assembly to ensure that the extruded nonwoven fabric can smoothly enter the channel. A negative pressure chamber 154 is also provided inside the negative pressure adsorption box 151. The inner wall of 153 is uniformly distributed with honeycomb-shaped adsorption pores 155. The adsorption pores 155 are connected to the negative pressure chamber 154. The negative pressure chamber 154 is connected to the vacuum pump 152 through the negative pressure pipe 156. A negative pressure controller is installed on the negative pressure pipe 156. The vacuum pump 152 and the negative pressure controller are both connected to the PLC control cabinet through wires. The negative pressure value is adjusted by the control system. The bottom of the negative pressure adsorption box 151 is provided with a drain port, which is connected to the liquid recovery and circulation structure 160 through a pipe to transport the adsorbed liquid to the liquid recovery and circulation structure 160.

[0035] refer to Figure 1 , Figure 2 and Figure 6The liquid recovery and circulation structure 160 includes a primary filter tank 161, a precision filter tank 162, an ultraviolet disinfection component 163, and a constant temperature storage tank 164, which are connected in sequence by pipes. The primary filter tank 161 has a cylindrical structure, and at least one filter screen 165 is fixedly installed inside the primary filter tank 161 from top to bottom. In this embodiment, two filter screens 165 are provided, and the pore size of the filter screen 165 on the upper side is larger than that of the filter screen 165 on the lower side. The primary filter tank 161 has an inlet at the top and an outlet at the bottom. The inlet of the primary filter tank 161 is connected to the collection tank of the double roller extrusion component 140 through a liquid guide pipe. The drain ports of the liquid hopper 142 and the negative pressure adsorption box 151 are connected; the precision filter tank 162 is also a cylindrical structure, and multiple activated carbon filter elements 167 are detachably installed inside the precision filter tank 162. The multiple activated carbon filter elements 167 are arranged side by side inside the precision filter tank 162. Both ends of the precision filter tank 162 are sealed by end caps, with an inlet at the top and an outlet at the bottom; the primary filter tank 161 is installed side by side with the precision filter tank 162. The outlet of the primary filter tank 161 is connected to the inlet of the precision filter tank 162 through a pipe to form a series filtration link. The outlet of the precision filter tank 162 is connected to the ultraviolet disinfection component 163 through a pipe to achieve step-by-step purification of the liquid.

[0036] refer to Figure 1 , Figure 2 and Figure 3 The ultraviolet disinfection component 163 is installed on the right side of the precision filter tank 162, including a sleeve-type disinfection chamber 171 and multiple ultraviolet lamps 172. The axis of the sleeve-type disinfection chamber 171 is consistent with the direction of liquid flow. The sleeve-type disinfection chamber 171 has a cylindrical structure with inlet and outlet ports at both ends. One end of the inlet of the sleeve-type disinfection chamber 171 is connected to the outlet of the precision filter tank 162 through a pipe, and the other end of the outlet is connected to the constant temperature storage tank 164 through a pipe. The ultraviolet lamps 172 are installed along the axial direction of the chamber. Each ultraviolet lamp 172 is covered with a quartz sleeve 173. The two ends of the quartz sleeve 173 are fixed to the end cap of the chamber through a sealing structure. The ultraviolet lamps 172 are connected to the PLC control cabinet through wires and are controlled by the control system to start and stop.

[0037] A constant-temperature storage tank 164 is installed on the right side of the ultraviolet disinfection component 163. The constant-temperature storage tank 164 has a cylindrical structure. The inlet of the constant-temperature storage tank 164 is connected to the outlet of the sleeve-type disinfection chamber 171 through a pipe. The bottom of the constant-temperature storage tank 164 has an outlet connected to a variable frequency water pump 180 through a pipe. The outlet of the variable frequency water pump 180 is connected to the high-pressure micro-mist spray component of the precision immersion structure and the constant-temperature soaking tank 133 through a main infusion pipe 132 to form a liquid circulation. The constant-temperature storage tank 164 is wrapped with a heating jacket 168. The heating jacket 168 is electrically connected to a temperature controller. A concentration sensor is fixedly installed on the top of the constant temperature storage tank 164. The detection end of the concentration sensor extends into the liquid inside the constant temperature storage tank 164. A replenishment pipe 169 is connected to the top of the constant temperature storage tank 164. One end of the replenishment pipe 169 is connected to the top of the tank, and the other end is used to connect to the original liquid storage tank. An electromagnetic valve is installed on the replenishment pipe 169. The temperature controller, concentration sensor and electromagnetic valve are all connected to the PLC control cabinet through wires to realize automatic temperature and concentration control and original liquid replenishment.

[0038] In addition, the bottom of the constant temperature storage tank 164 is connected to a drain pipe 190. One end of the drain pipe 190 is connected to the MBR membrane bioreactor. The drain pipe 190 is equipped with a valve, which is opened periodically under the control of the PLC control system. A water quality detector is installed on the outlet pipe of the MBR membrane bioreactor. The water quality detector is connected to the control cabinet through a signal line to detect the water quality in real time. After meeting the standards, the water is discharged through the drain pipe.

[0039] The implementation principle of an intelligent circulating wet wipe production line according to an embodiment of this application is as follows: The operator installs a roll of spunlace nonwoven fabric on the unwinding roller 121, starts the PLC control system, and the unwinding roller 121 starts to rotate under the drive of the unwinding motor, gradually releasing the nonwoven fabric. The released nonwoven fabric first passes around the guide roller 122 of the tension controller. At this time, the tension sensor is in contact with the surface of the nonwoven fabric to detect the fabric tension in real time: if the tension is lower than the preset threshold, the PLC system controls the speed of the unwinding roller 121 to decrease, reducing the amount of nonwoven fabric released; if the tension is higher than the preset threshold, the speed of the unwinding roller 121 is increased, increasing the amount of nonwoven fabric released; the nonwoven fabric after tension regulation is conveyed downstream to the precision wetting structure along the conveying path. According to the preset wet wipe formula, the PLC system controls the valve of the main liquid delivery pipe 132 to open, and the raw liquid is diverted to the upstream through the main liquid delivery pipe 132. The two sets of spray heads 130 are connected to branch pipes 131. Flow sensors on branch pipes 131 monitor the flow rate of the raw liquid in real time, ensuring that the upper and lower spray heads 130 spray the raw liquid evenly on both sides of the nonwoven fabric, achieving pre-wetting of the substrate surface, breaking the surface tension of the fibers, and preparing for deep immersion. The pre-wetted nonwoven fabric falls directly into the constant temperature soaking tank 133 below. The raw liquid in the tank has been heated to the preset temperature by the heating and insulation layer, and the stirring component 136 operates continuously, making the raw liquid components uniform and free of sediment. The nonwoven fabric is completely immersed in the soaking tank and moves forward with the conveying power, fully absorbing the raw liquid. If the liquid level is lower than the preset value, the PLC system controls the variable frequency water pump 180 of the liquid recovery and circulation structure 160 to start, replenishing the purified raw liquid to the soaking tank and maintaining a stable liquid level. After soaking, the nonwoven fabric, carrying sufficient raw liquid, is transported to the excess liquid separation structure.

[0040] After being impregnated, the nonwoven fabric enters the double-roller extrusion assembly 140. The PLC system controls the drive motor 146 of the lifting adjustment component 143 to operate according to the thickness of the nonwoven fabric. The height of the upper silicone extrusion roller 141 is adjusted via the ball screw 144. The upper and lower silicone extrusion rollers 141 rotate relative to each other, applying uniform extrusion pressure to the nonwoven fabric and squeezing out excess liquid. The squeezed liquid flows along the spiral guide grooves 1411 on the surface of the extrusion rollers and eventually flows into the collection hopper 142 below. The extruded nonwoven fabric continues to be conveyed to the negative pressure suction... When the nonwoven fabric passes through the conveying channel 153 of the negative pressure adsorption box 151, the honeycomb adsorption holes 155 on the inner wall of the channel generate suction, adsorbing the residual raw liquid on the surface of the substrate that has not been squeezed clean into the negative pressure chamber 154. The adsorbed raw liquid is collected at the drain port at the bottom of the adsorption box under the action of gravity. The raw liquid in the liquid collection hopper 142 and the drain port of the adsorption box are both transported to the primary filter tank 161 of the liquid recovery and circulation structure 160 through the liquid guide pipe. At the same time, the nonwoven fabric that has been drained twice is transported to the subsequent cutting and packaging processes.

[0041] The raw liquid transported by the excess liquid separation structure passes through a step-by-step process of primary filter tank 161, precision filter tank 162, and ultraviolet disinfection component 163. This process removes impurities, odors, and microorganisms from the excess liquid layer by layer, ensuring that the purity of the recovered liquid meets the immersion requirements. Then, the PLC system controls the variable frequency water pump 180 at the bottom of the constant temperature storage tank 164 to start, transporting the qualified raw liquid in the constant temperature storage tank 164 through the main inlet pipe 132 to the branch pipe 131 of the high pressure micro-mist spray component and the inlet of the constant temperature soaking tank 133, thus realizing the recycling of the raw liquid.

[0042] When the raw solution is used multiple times in the circulation system to form aged liquid, the PLC system periodically opens the valve of the drain pipe 190 at the bottom of the constant temperature storage tank 164 to discharge the aged liquid into the MBR membrane bioreactor. The water quality analyzer can detect the effluent after treatment by the MBR membrane bioreactor. If the water quality meets the standards, the drain pipe valve is opened to discharge the water into the external pipe network; if it does not meet the standards, it is returned to the reactor for reprocessing until it meets the standards.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An intelligent circulating wet wipe production line comprising a rack (110), characterized in that: The rack (110) is sequentially provided with a non-woven fabric unwinding structure (120), a precise wetting structure, a redundant liquid separation structure and a liquid recycling structure (160) along the non-woven fabric conveying direction, the non-woven fabric unwinding structure (120) is used to convey the non-woven fabric to the precise wetting structure, the precise wetting structure is used to realize uniform wetting of the non-woven fabric, the redundant liquid separation structure is used to discharge the redundant liquid on the wetted non-woven fabric, and the liquid recycling structure (160) is used to recycle the redundant liquid and return the purified redundant liquid to the precise wetting structure.

2. The intelligent circulating wet wipe production line according to claim 1, characterized in that: The precise wetting structure comprises a high-pressure micro-mist spraying assembly and a total liquid supply pipe (132), the high-pressure micro-mist spraying assembly comprises two groups of spraying heads (130) symmetrically arranged on the upper and lower sides of the non-woven fabric, each group of spraying heads (130) is communicated with the total liquid supply pipe (132) through a branch pipe (131), and a flow sensor and an electromagnetic valve are installed in series on the branch pipe (131).

3. The intelligent circulating wet wipe production line according to claim 2, characterized in that: The precise weting structure further comprises a constant-temperature soaking tank (133), the constant-temperature soaking tank (133) is located directly below the high-pressure micro-mist spraying assembly, a heating and heat preservation layer is wrapped outside the tank body of the constant-temperature soaking tank (133), a stirring assembly (136) is fixedly installed on the bottom of the tank body of the constant-temperature soaking tank (133), and a liquid level sensor is embedded on the upper part of the side wall of the tank body of the constant-temperature soaking tank (133).

4. The intelligent circulating wet wipe production line according to claim 1, characterized in that: The redundant liquid separation structure comprises a double-roller extrusion assembly (140), the double-roller extrusion assembly (140) comprises a liquid collecting hopper (142) and silicon rubber extrusion rollers (141) symmetrically arranged above and below, the silicon rubber extrusion roller (141) located on the upper side is connected with the rack (110) in a positionable sliding mode through a lifting adjusting piece (143), the liquid collecting hopper (142) is arranged directly below the silicon rubber extrusion rollers (141) and used to receive the liquid extruded from the two silicon rubber extrusion rollers (141), and the liquid collecting hopper (142) is communicated with the liquid recycling structure (160).

5. The intelligent circulating wet wipe production line according to claim 4, characterized in that: The redundant liquid separation structure further comprises a negative pressure adsorption assembly (150), the negative pressure adsorption assembly (150) comprises a negative pressure adsorption box (151) and a vacuum pump (152), the negative pressure adsorption box (151) is arranged on the rack (110), a conveying channel (153) matched with the non-woven fabric is formed in the negative pressure adsorption box (151), a negative pressure cavity (154) is further formed in the negative pressure adsorption box (151), the inner wall of the conveying channel (153) is uniformly provided with honeycomb-shaped adsorption holes (155), the adsorption holes (155) are communicated with the negative pressure cavity (154), the negative pressure cavity (154) is connected with the vacuum pump (152) through a negative pressure pipe (156), and a negative pressure controller is installed on the negative pressure pipe (156).

6. The intelligent circulating wet wipe production line according to claim 5, characterized in that: The liquid recovery cycle structure (160) comprises a primary filter tank (161), a precision filter tank (162), an ultraviolet disinfection assembly (163) and a constant temperature liquid storage tank (164) connected in sequence by pipelines, the primary filter tank (161) is connected with the excess liquid separation structure, the primary filter tank (161) and the precision filter tank (162) are used for multi-stage purification of the excess liquid, the ultraviolet disinfection assembly (163) is used for disinfecting the purified excess liquid, and the constant temperature liquid storage tank (164) is used for returning to the precise wetting structure.

7. The intelligent circulating wet wipe production line according to claim 6, characterized in that: At least one filter screen (165) is fixedly installed in the primary filter tank (161) from top to bottom, a liquid inlet at the top of the primary filter tank (161) is connected with the excess liquid separation structure, a liquid outlet at the bottom of the primary filter tank (161) is connected with a liquid inlet at the top of the precision filter tank (162) through a pipeline, and a plurality of activated carbon filter cartridges (167) are detachably installed in the precision filter tank (162), the plurality of activated carbon filter cartridges (167) are arranged side by side in the precision filter tank (162), and a liquid outlet at the bottom of the precision filter tank (162) is connected with the ultraviolet disinfection assembly (163).

8. The intelligent circulating wet wipe production line according to claim 7, characterized in that: The ultraviolet disinfection assembly (163) comprises a sleeve type disinfection cavity (171) and a plurality of ultraviolet lamp tubes (172), the ultraviolet lamp tubes (172) are axially embedded in the sleeve type disinfection cavity (171), the plurality of ultraviolet lamp tubes (172) are arranged in a circumferential direction of the sleeve type disinfection cavity (171), each ultraviolet lamp tube (172) is provided with a high-transmittance quartz sleeve (173), one end of the sleeve type disinfection cavity (171) is connected with the liquid outlet at the bottom of the precision filter tank (162), and the other end of the sleeve type disinfection cavity (171) is connected with the constant temperature liquid storage tank (164).

9. The intelligent circulating wet wipe production line according to claim 8, characterized in that: The constant temperature liquid storage tank (164) is wrapped with a heating jacket (168), the heating jacket (168) is electrically connected with a temperature controller, a concentration sensor is fixedly installed at the top of the constant temperature liquid storage tank (164), a detection end of the concentration sensor is inserted into liquid in the constant temperature liquid storage tank (164), a control system is arranged on the rack (110), a signal output end of the concentration sensor is electrically connected with the control system, a supplement pipe (169) is connected with the top of the constant temperature liquid storage tank (164), an electromagnetic valve is installed on the supplement pipe (169), and the electromagnetic valve is electrically connected with the control system.

10. The intelligent circulating wet wipe production line according to claim 3, characterized in that: The stirring assembly (136) comprises a stirring motor (137), a stirring shaft (138) and stirring paddles (139), the stirring motor (137) is arranged at the bottom of the constant temperature soaking groove (133), the stirring shaft (138) is coaxially connected with an output shaft of the stirring motor (137), and a plurality of stirring paddles (139) are arranged in a circumferential direction of the stirring shaft (138).

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