A flushing circulating water zero discharge system and method for glass wool production

Abstract

This invention discloses a zero-discharge system and method for rinsing circulating water in glass wool production, belonging to the field of wastewater treatment and recycling technology in glass wool production. The system includes a spray rinsing unit, a wastewater collection unit, a solid-liquid separation unit, and a recycling pipeline unit. The spray rinsing unit is located in the fiber accumulation area of ​​the glass wool production line. The wastewater collection unit collects the mixed water containing glass fiber waste wool generated during rinsing. The solid-liquid separation unit separates the glass fiber waste wool and obtains circulating water through a sewage pump and a vibrating screen. The recycling pipeline unit returns a portion of the circulating water to the spray rinsing unit and another portion to the binder preparation system. The system can also adjust the spray state of the direct spray nozzles according to the vibration value of the forming fan and adjust the sewage pump flow rate according to the processing state of the vibrating screen. This invention can achieve internal circulation and production consumption utilization of rinsing water under normal continuous production conditions, reducing wastewater discharge and improving production continuity and binder utilization rate.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment and recycling in glass wool production, and particularly to a zero-discharge system and method for rinsing circulating water in glass wool production. Background Technology

[0002] Glass wool is a commonly used thermal insulation, heat insulation, and sound absorption material, widely used in construction, industrial equipment, pipeline insulation, and transportation. The production process of glass wool typically involves turning molten glass into fine glass fibers, spraying an adhesive onto the fiber surface, and then collecting, curing, and cutting the fibers to form the final glass wool product.

[0003] In actual production, glass fibers tend to move with airflow and accumulate in areas such as fiber collection wells, fiber collection boxes, and forming fans. As operating time increases, the accumulated glass fibers can affect equipment stability, fan balance, and the production environment, requiring companies to periodically shut down the equipment for cleaning. This shutdown for cleaning not only disrupts production continuity but also generates secondary dust and increases labor intensity.

[0004] On the other hand, the flushing water generated during the cleaning process contains a large amount of waste glass fiber, suspended solids, and some incompletely utilized binder components. Direct discharge into the sewer system would not only increase the burden on wastewater treatment but also waste valuable materials. Existing sedimentation treatment methods have limited effectiveness in separating suspended glass fibers, and reuse can easily cause clogging of nozzles, manifolds, and other components. While flocculation and flotation methods can improve separation efficiency, they have higher equipment investment and operating costs and may introduce additional chemicals, making them unsuitable for reuse in binder preparation systems.

[0005] Therefore, it is necessary to propose a flushing circulating water system suitable for the on-site working conditions of glass wool production lines, so that waste glass fiber wool can be flushed, collected and separated in a timely manner, and the separated circulating water can be reused for flushing the wool collection system or for binder preparation, thereby realizing the internal circulation of flushing wastewater and production consumption under normal continuous production conditions. Summary of the Invention

[0006] The purpose of this invention is to provide a zero-discharge system and method for rinsing circulating water in glass wool production, in order to solve the problems of easy accumulation of glass fiber waste wool in parts such as cotton collection wells, cotton collection boxes, and forming fans during glass wool production, heavy burden of external discharge and treatment of rinsing wastewater, and failure to fully utilize effective substances in wastewater.

[0007] To achieve the above objectives, the present invention provides a zero-discharge system for rinsing circulating water in glass wool production, comprising a spray rinsing unit, a wastewater collection unit, a solid-liquid separation unit, and a recycling pipeline unit.

[0008] The spray rinsing unit is installed in the fiber accumulation area of ​​the glass wool production line to rinse the fiber accumulation area. The fiber accumulation area may include at least two of the following locations: the bottom of the cotton collection well chain plate, the inside of the cotton collection box, and the inlet of the forming fan. The spray rinsing unit includes a nozzle, spray pipeline, and water supply pump. Preferably, a direct spray nozzle is installed at the inlet of the forming fan, and the direct spray nozzle is positioned towards the forming fan impeller to provide directional rinsing of the forming fan impeller.

[0009] The spray pressure of the spray rinsing unit is preferably 2.8-4.2 kg; within this spray pressure range, the single nozzle water flow rate of the direct spray nozzle at the forming blower is preferably 20-40 L / min. Through the above pressure and flow control, the rinsing effect and system water supply capacity can be balanced, avoiding insufficient rinsing effect due to excessively low pressure, and also avoiding the impact of excessive spray on the normal operation of the production line.

[0010] The wastewater collection unit is used to collect the mixed water containing waste glass fiber cotton formed after spray rinsing. Preferably, the wastewater collection unit includes a sloping pit located at the bottom of the cotton collection well and / or cotton collection box. The sloping pit is used to allow the mixed water and waste glass fiber cotton formed during rinsing to converge towards the lower part of the pit under gravity. The water level in the sloping pit is set to be higher than the inlet height of the subsequent sewage pump to ensure that the mixed water can smoothly enter the sewage pump inlet.

[0011] The solid-liquid separation unit is connected to the wastewater collection unit and is used to physically screen the mixed water to separate the waste glass fiber and obtain screened circulating water. Preferably, the solid-liquid separation unit includes a sewage pump, a vibrating screen, and a circulating water storage tank. The inlet of the sewage pump is connected to the wastewater collection unit, and the outlet of the sewage pump is connected to the inlet of the vibrating screen. The vibrating screen is used to retain the waste glass fiber, and the screened circulating water enters the circulating water storage tank.

[0012] Preferably, the sewage pump is a self-priming sewage pump. Further, the system includes a pump flow control structure, which adjusts the sewage pump's delivery flow rate based on at least one of the following: the overflow state of the vibrating screen, the liquid level at the vibrating screen inlet, and the liquid level in the circulating water storage tank, so that the flow rate of the mixed water entering the vibrating screen matches the processing capacity of the vibrating screen. This prevents excessive sewage pump flow from causing mixed water to overflow from the end of the vibrating screen and reduces the risk of screen clogging due to high solids content.

[0013] The recycling pipeline unit includes a first recycling pipeline and a second recycling pipeline. The first recycling pipeline is used to return the screened circulating water to the spray rinsing unit for continued use as rinsing water; the second recycling pipeline is used to transport the screened circulating water to the adhesive preparation system for use as adhesive preparation water. Since the screened circulating water may still contain usable adhesive components, using it in the adhesive preparation system enables the reuse of useful substances and reduces the amount of wastewater discharged.

[0014] Preferably, the outlet of the circulating water storage tank is equipped with a filter to further intercept fine particulate matter and reduce the risk of clogging in the spray pipes, manifolds, and nozzles. The vibrating screen may be equipped with a screen condition monitoring structure to monitor the screen clogging status and / or screen damage status. The screen condition monitoring structure may include a liquid level detection device, a flow rate detection device, a differential pressure detection device, or a manual inspection window.

[0015] Preferably, the system further includes a fan vibration detection device and a control module. The fan vibration detection device is used to detect the vibration value of the forming fan, and the control module is used to adjust the spray frequency, spray duration, and / or spray flow rate of the direct injection nozzle according to the vibration value. When the vibration value of the forming fan increases, it indicates that there may be fiber adhesion or scale buildup on the impeller surface, and the control module can increase the spray intensity of the direct injection nozzle; when the vibration value of the forming fan returns to the normal range, the control module can reduce the spray intensity to reduce unnecessary water consumption.

[0016] This invention also provides a method for zero discharge of rinsing circulating water in glass wool production, comprising the following steps: S1, Spray rinsing: Spray rinsing is performed on the fiber accumulation area of ​​the glass wool production line, so that the waste glass fiber attached to the fiber accumulation area forms a mixed water with the rinsing water; S2, Wastewater collection: The mixed water is introduced into the wastewater collection unit, and the glass fiber waste cotton in the mixed water is collected with the water flow; S3, solid-liquid separation: the mixed water is pumped to a vibrating screen by a sewage pump, the vibrating screen retains the waste glass fiber cotton, and the screened circulating water enters the circulating water storage tank. S4, Recycling: At least a portion of the circulating water in the circulating water storage tank is returned to the spray rinsing unit via the first circulating pipeline for use as rinsing water, and at least another portion of the circulating water in the circulating water storage tank is transported to the adhesive preparation system via the second circulating pipeline for use as adhesive preparation water. S5, Status Adjustment and Maintenance: Adjust the spraying status of the direct spray nozzle at the forming fan according to the vibration value of the forming fan, and / or adjust the sewage pump flow rate according to the processing status of the vibrating screen, and / or adjust the flow distribution between the first circulation pipeline and the second circulation pipeline according to the liquid level of the circulating water storage tank.

[0017] In this invention, "zero discharge" means that under normal continuous production conditions, the rinsing wastewater is collected, screened, and reused in the spray rinsing and / or binder preparation system, without setting up a process path for continuous discharge of rinsing wastewater into the external sewage network; the venting, cleaning, and emergency handling during equipment maintenance, abnormal operating conditions, or shutdown maintenance do not affect the meaning of zero discharge under normal continuous production conditions as stated in this invention.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention incorporates areas in the glass wool production line where waste glass fiber tends to accumulate into the spray rinsing range, and forms an internal closed loop through wastewater collection, physical screening, and recycling, which can reduce or avoid the discharge of rinsing wastewater under normal continuous production conditions.

[0019] 2. This invention uses a vibrating screen to physically screen mixed water containing waste glass fiber cotton, which can separate waste glass fiber cotton without introducing flocculants, flotation agents or other external chemical agents, making it suitable for subsequent circulating rinsing and binder preparation.

[0020] 3. In this invention, a portion of the screened circulating water is reused for spray rinsing, while the other portion is transported to the binder preparation system, allowing some of the effective substances in the wastewater to be reused, which helps to reduce production water consumption and binder waste.

[0021] 4. This invention adjusts the spraying state of the direct injection nozzle by regulating the vibration value of the forming fan, and links the vibration state of the forming fan with the cleaning state of the impeller. This allows for adjustment of the rinsing intensity based on the actual fiber accumulation, thereby improving the targeting of the rinsing.

[0022] 5. By matching the sewage pump flow rate with the vibrating screen processing capacity, this invention can reduce the risk of overflow at the end of the vibrating screen and screen blockage, and improve the stability of continuous system operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a zero-discharge system for rinsing circulating water in glass wool production according to the present invention.

[0024] Explanation of reference numerals in the attached figures: 110. Cotton collection well; 120. Cotton collection box; 130. Forming fan; 210. Spray nozzle; 220. Direct spray nozzle; 300. Sloping pit; 310. Water outlet pipe; 410. Sewage pump; 420. Vibrating screen; 430. Circulating water storage tank; 500. Water supply pump. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. All equivalent substitutions or conventional modifications made based on the technical concept of the present invention should fall within the scope of protection of the present invention.

[0026] like Figure 1 As shown, this embodiment provides a zero-discharge system for rinsing circulating water in glass wool production, including a spray rinsing unit, a wastewater collection unit, a solid-liquid separation unit, and a recycling pipeline unit.

[0027] The spray rinsing unit is located in the fiber accumulation area of ​​the glass wool production line. The fiber accumulation area includes the bottom of the chain plate of the cotton collection well 110, the interior of the cotton collection box 120, and the inlet of the forming blower 130. The spray rinsing unit includes multiple spray nozzles 210, a direct spray nozzle 220 located at the inlet of the forming blower 130, spray pipelines, and a water supply pump 500.

[0028] At the bottom of the chain plate in the cotton collection well 110, spray nozzles 210 are positioned towards the bottom of the chain plate and the area prone to fiber accumulation, used to rinse the waste glass fiber adhering to the bottom of the chain plate and its vicinity. Inside the cotton collection box 120, spray nozzles 210 are positioned towards the box walls, bottom, or airflow passage area of ​​the cotton collection box 120, used to rinse the waste glass fiber adhering to the box walls and bottom, and to help reduce the particulate matter content in the airflow. At the inlet of the forming fan 130, direct spray nozzles 220 are positioned towards the forming fan impeller, used to directly rinse the waste glass fiber or accumulated dirt adhering to the impeller surface.

[0029] The spray pressure of the spray rinsing unit is controlled between 2.8 and 4.2 kg. If the spray pressure is too low, the spray effect and rinsing capacity of the nozzles will be insufficient; if the spray pressure is too high, it may increase water consumption and affect the stability of on-site operation. Within the above pressure range, the single nozzle water flow rate of the direct spray nozzle 220 at the forming fan 130 is controlled at 20-40 L / min to ensure the directional cleaning effect on the forming fan impeller.

[0030] The wastewater collection unit includes a sloping pit 300 located at the bottom of the cotton collection well 110 and / or cotton collection box 120. The sloping pit 300 collects mixed water generated by spray rinsing, which contains washed-off glass fiber waste cotton. The sloping pit 300 has a slope that converges towards a lower area, allowing the mixed water and glass fiber waste cotton to naturally converge to the lower area under gravity. An outlet pipe 310 is installed in the lower area of ​​the sloping pit 300, and the outlet pipe 310 is connected to the inlet of the sewage pump 410. The water level in the sloping pit 300 is set to be higher than the inlet height of the sewage pump 410 to ensure that the mixed water can smoothly enter the sewage pump 410.

[0031] The solid-liquid separation unit includes a sewage pump 410, a vibrating screen 420, and a circulating water storage tank 430. The sewage pump 410 is preferably a self-priming sewage pump, with its inlet connected to the outlet pipe 310 via a pipeline, and its outlet connected to the inlet of the vibrating screen 420. The sewage pump 410 transports the mixed water from the inclined pit 300 to the vibrating screen 420. The vibrating screen 420 physically separates the mixed water, trapping waste glass fiber on the screen. The separated circulating water then enters the circulating water storage tank 430.

[0032] To prevent excessive flow from the sewage pump 410 from causing mixed water to overflow from the end of the vibrating screen 420, the system is equipped with a pump flow control structure. This structure can be a frequency converter, regulating valve, flow meter, level detection device, or a combination thereof. The pump flow control structure adjusts the flow rate of the sewage pump 410 based on the overflow status of the vibrating screen 420, the water level at the inlet of the vibrating screen, and / or the level in the circulating water storage tank 430, ensuring that the flow rate of mixed water entering the vibrating screen 420 matches its processing capacity. When water accumulation on the screen surface, overflow at the end of the vibrating screen, or an abnormally high water level at the inlet is detected, the flow rate of the sewage pump 410 is reduced or pumping is suspended; once the processing status of the vibrating screen 420 returns to normal, the flow rate of the sewage pump 410 is restored.

[0033] The vibrating screen 420 can be a single-layer or multi-layer screen structure. The screen aperture can be selected according to the size of the waste glass fiber, the cleanliness requirements of the circulating water, and the anti-clogging requirements of the nozzles. The vibrating screen 420 can also be equipped with a screen status monitoring structure, which can determine whether the screen is blocked or damaged by changes in liquid level, flow rate, pressure difference, or manual inspection. When the screen is blocked, it is flushed or cleaned; when the screen is damaged, it is replaced to prevent larger waste glass fiber from entering the circulating water storage tank 430.

[0034] The circulating water storage tank 430 is used to temporarily store the circulating water after screening. The outlet of the circulating water storage tank 430 is connected to the first circulation pipeline and the second circulation pipeline. The first circulation pipeline is connected to the inlet of the water supply pump 500, so that the circulating water in the circulating water storage tank 430 can return to the spray rinsing unit and continue to be used as rinsing water for spray rinsing at the cotton collection well 110, cotton collection box 120 and / or forming fan 130. The second circulation pipeline is connected to the water supply port of the binder preparation system, so that a portion of the circulating water in the circulating water storage tank 430 can be consumed in the production process as binder preparation water.

[0035] A filter is preferably installed at the outlet of the circulating water storage tank 430. The filter is used to intercept fine particles that may still remain after screening, thereby reducing the risk of clogging in the spray pipes, manifolds, and nozzles. The filter can be installed on the first circulation pipe or on the main outlet pipe of the circulating water storage tank 430. Furthermore, the filter can be equipped with a backwashing structure or a removable maintenance structure for easy cleaning in case of clogging.

[0036] In this embodiment, the system also includes a fan vibration detection device and a control module. The fan vibration detection device is installed on or connected to the forming fan 130 and is used to detect the vibration value of the forming fan 130. The control module is electrically connected to the fan vibration detection device, the control valve of the pipeline where the direct spray nozzle 220 is located, and / or the water supply pump 500. When the fan vibration detection device detects that the vibration value of the forming fan 130 has increased and reached a preset threshold, the control module increases the spray frequency, spray duration, and / or spray flow rate of the direct spray nozzle 220 to enhance the flushing of the forming fan impeller; when the vibration value of the forming fan 130 decreases to a preset normal range, the control module reduces the spray intensity of the direct spray nozzle 220 or restores the normal spray state.

[0037] This embodiment can also adjust the flow distribution between the first and second circulation pipelines based on the liquid level of the circulating water storage tank 430. When the liquid level in the circulating water storage tank 430 is high, the water supply from the second circulation pipeline to the binder preparation system can be increased, allowing the circulating water to be consumed during the production preparation process. When the liquid level in the circulating water storage tank 430 is low, priority can be given to ensuring the flushing water supply to the first circulation pipeline to maintain the normal operation of the spray flushing unit. The above adjustments can be achieved through manual valves, flow meters, electric regulating valves, or automatic control modules.

[0038] The method for achieving zero discharge of rinsing circulating water in glass wool production using the above system includes the following processes: First, during the operation of the glass wool production line, the water supply pump 500 is started to deliver circulating water or initial replenishment water from the circulating water storage tank 430 to the spray rinsing unit. Spray nozzles 210 rinse the bottom of the chain plate in the cotton collection well 110 and the inside of the cotton collection box 120, while direct spray nozzles 220 perform directional rinsing of the impeller of the forming fan 130. The spray pressure is controlled at 2.8-4.2 kg, and the single-nozzle water flow rate of the direct spray nozzle 220 at the forming fan 130 is controlled at 20-40 L / min.

[0039] Secondly, the washed-off waste glass fiber cotton forms a mixed water with the washing water, which flows into the sloping pit 300 along the bottom of the cotton collection well 110 and / or cotton collection box 120. Due to the slope of the sloping pit 300, the mixed water and waste glass fiber cotton gather in the lower area under the action of gravity, and enter the inlet of the sewage pump 410 through the outlet pipe 310.

[0040] Then, the sewage pump 410 delivers the mixed water to the vibrating screen 420. When the vibrating screen 420 is operating, the screen traps waste glass fiber, and the screened circulating water enters the circulating water storage tank 430. If water accumulates on the screen surface of the vibrating screen 420, overflows at the end, or the inlet water level rises abnormally, it indicates that the flow rate of the mixed water entering the vibrating screen 420 exceeds its processing capacity or that the screen is clogged. In this case, reduce the flow rate of the sewage pump 410 or stop pumping, and clean or maintain the screen.

[0041] Subsequently, the circulating water in the circulating water storage tank 430 is utilized in two ways: one part is returned to the spray rinsing unit via the first circulation pipeline for subsequent rinsing; the other part is transported to the adhesive preparation system via the second circulation pipeline and consumed in the production process as adhesive preparation water. Thus, under normal continuous production conditions, the rinsing wastewater is no longer continuously discharged as external sewage, but is instead circulated and utilized for rinsing and production within the system.

[0042] During system operation, the fan vibration detection device continuously or intermittently monitors the vibration value of the forming fan 130. When the vibration value increases, the control module determines that there may be fiberglass waste or dirt adhering to the surface of the forming fan impeller, and increases the spray frequency, spray duration, and / or spray flow rate of the direct spray nozzle 220; when the vibration value returns to normal, the control module reduces the spray intensity or restores the normal spray state. In this way, the fan vibration value can be used as a cleanliness reference index to perform targeted rinsing of the forming fan 130.

[0043] During system maintenance, regularly check the wear condition of the nozzles, the blockage condition of the manifolds and nozzles, the blockage or damage condition of the vibrating screen 420, the operating status of the sewage pump 410, and the liquid level status of the circulating water storage tank 430. Clean or replace nozzles when they are worn or blocked; clean or replace screens when they are blocked or damaged; when the system is shut down for maintenance, clean, drain, or repair the pit, circulating water storage tank, and pipelines in accordance with on-site environmental protection and safety management requirements.

[0044] This invention, through the above-described structure and method, organically combines key components of glass fiber waste wool that easily accumulates in a glass wool production line, wastewater and waste wool collection structures, physical screening structures, and recycling pipelines. This reduces the frequency of downtime for cleaning, lowers the demand for flushing wastewater discharge, improves the utilization rate of circulating water and effective components of binders, and enhances the operational stability of the production site.

Claims

1. A zero-discharge system for rinsing circulating water in glass wool production, characterized in that, include: A spray rinsing unit is installed in the fiber accumulation area of ​​the glass wool production line to rinse the fiber accumulation area. Wastewater collection unit, used to collect mixed water containing glass fiber waste cotton formed after rinsing by the spray rinsing unit; A solid-liquid separation unit, connected to the wastewater collection unit, is used to physically screen the mixed water to separate the waste glass fiber and obtain screened circulating water. The recycling pipeline unit includes a first recycling pipeline and a second recycling pipeline. The first recycling pipeline is used to return the screened circulating water to the spray rinsing unit, and the second recycling pipeline is used to transport the screened circulating water to the adhesive preparation system. Under normal continuous production conditions, the spray rinsing unit, wastewater collection unit, solid-liquid separation unit, and recycling pipeline unit form an internal circulation loop for rinsing water and a production consumption and utilization loop.

2. The zero-discharge system for rinsing circulating water in glass wool production according to claim 1, characterized in that, The fiber accumulation area includes at least two of the following locations: the bottom of the cotton collection well chain plate, the inside of the cotton collection box, and the inlet of the forming fan; the spray rinsing unit includes spray devices respectively arranged towards the corresponding fiber accumulation area.

3. The zero-discharge system for rinsing circulating water in glass wool production according to claim 2, characterized in that, A direct spray nozzle is provided at the inlet of the forming fan, and the direct spray nozzle is positioned facing the impeller of the forming fan for directional rinsing of the impeller.

4. The zero-discharge system for rinsing circulating water in glass wool production according to claim 3, characterized in that, The spray pressure of the spray rinsing unit is 2.8-4.2 kg; under the spray pressure, the water flow rate of a single nozzle of the direct spray head is 20-40 L / min.

5. The zero-discharge system for rinsing circulating water in glass wool production according to claim 1, characterized in that, The wastewater collection unit includes a sloping pit located at the bottom of the cotton collection well and / or cotton collection box. The sloping pit is used to allow the mixed water and waste glass fiber cotton generated during rinsing to collect in the lower area of ​​the pit under the action of gravity. The water level of the sloping pit is set to be higher than the inlet height of the subsequent sewage pump.

6. The zero-discharge system for rinsing circulating water in glass wool production according to claim 1, characterized in that, The solid-liquid separation unit includes a sewage pump, a vibrating screen, and a circulating water storage tank; the inlet of the sewage pump is connected to the wastewater collection unit, and the outlet of the sewage pump is connected to the inlet of the vibrating screen. The vibrating screen is used to intercept waste glass fiber cotton, and the screened circulating water enters the circulating water storage tank.

7. The zero-discharge system for rinsing circulating water in glass wool production according to claim 6, characterized in that, The sewage pump is a self-priming sewage pump; the system also includes a pump flow control structure, which is used to adjust the delivery flow of the sewage pump according to at least one of the overflow state of the vibrating screen, the liquid level at the inlet of the vibrating screen, and the liquid level of the circulating water storage tank, so that the flow rate of the mixed water entering the vibrating screen matches the processing capacity of the vibrating screen.

8. The zero-discharge system for rinsing circulating water in glass wool production according to claim 3, characterized in that, The system also includes a fan vibration detection device and a control module. The fan vibration detection device is used to detect the vibration value of the forming fan, and the control module is used to adjust the spraying frequency, spraying duration and / or spraying flow rate of the direct injection nozzle according to the vibration value.

9. The zero-discharge system for rinsing circulating water in glass wool production according to claim 6, characterized in that, The outlet of the circulating water storage tank is equipped with a filter, and / or the vibrating screen is equipped with a screen condition monitoring structure, which is used to monitor the screen blockage status and / or screen damage status.

10. A method for zero-discharge of circulating water for rinsing during glass wool production, characterized in that, Includes the following steps: S1, Spray rinsing: Spray rinsing is performed on the fiber accumulation area of ​​the glass wool production line, so that the waste glass fiber attached to the fiber accumulation area forms a mixed water with the rinsing water; S2, Wastewater collection: The mixed water is introduced into the wastewater collection unit, and the glass fiber waste cotton in the mixed water is collected with the water flow; S3, solid-liquid separation: the mixed water is pumped to a vibrating screen by a sewage pump, the vibrating screen retains the waste glass fiber cotton, and the screened circulating water enters the circulating water storage tank. S4, Recycling: At least a portion of the circulating water in the circulating water storage tank is returned to the spray rinsing unit via the first circulating pipeline for use as rinsing water, and at least another portion of the circulating water in the circulating water storage tank is transported to the adhesive preparation system via the second circulating pipeline for use as adhesive preparation water. S5, Status Adjustment and Maintenance: Adjust the spraying status of the direct spray nozzle at the forming fan according to the vibration value of the forming fan, and / or adjust the sewage pump flow rate according to the processing status of the vibrating screen, and / or adjust the flow distribution between the first circulation pipeline and the second circulation pipeline according to the liquid level of the circulating water storage tank.

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