Bottle Washing in PET Recycling

A PET recycling and cleaning device that efficiently cleans and recycles PET bottle flakes while conserving water resources. The device has an overflow tank, a conveyor, a cleaning device, and a draining device. The conveyor transports PET flakes into the cleaning tank. The cleaning device cleans the flakes. Water drains from the flakes into the overflow tank. Excess water is pumped back into the cleaning tank to complete the cycle. This prevents flakes from floating during cleaning and reduces water usage compared to traditional methods.

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Cleaning and pre-processing device for waste plastic bottle flakes that improves the efficiency and quality of cleaning compared to water washing. The device has a rotating conveyor system inside a tank. The tank has a feeding pipe and a transport box connected to it. The conveyor has rotating shafts with belts between them. The tank has cleaning disks on the shaft. The conveyor moves the flakes through the cleaning disks. This provides a continuous, mechanical scrubbing action to remove impurities from the flakes. The disks can be configured with different shapes and textures to optimize cleaning.

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A food-grade recycled PET bottle processing equipment that effectively cleans PET bottles to improve the quality of recycled PET flakes. The equipment uses a specialized assembly inside a housing to clean the bottles. It has a feeding port, bottom filter, cleaning nozzles, and a working extension plate. The assembly allows immersing the bottles in cleaning liquid and ultrasonic cleaning inside the housing to thoroughly remove labels and adhesives. This avoids the issues of incomplete label removal during sorting. The bottles are then conveyed out and picked up for further processing.

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PET bottle piece cleaning line that can reduce environmental pollution, change waste into valuable and obtain huge economic benefits. The cleaning line includes a storage bin, a floating material is collected and recycled, a first dehydrator for dehydration, the dehydrated material is conveyed to a label absorbing machine for removing light impurities such as labels, the light impurities are removed, the light impurities are conveyed to a salt tank for cleaning, the cleaned material is conveyed to a second dehydrator for dehydration, the dehydrated material is conveyed to a hot rinsing tank, suspended impurities are collected and recycled after hot rinsing, the bottom material is conveyed to a third dehydrator for dehydration, the dehydrated material is conveyed to a first rinsing tank for cold rinsing and soaking, the soaked material is conveyed to a second rinsing tank for continuous hot rinsing, the hot-washed material is conveyed to a third rinsing tank after being dehydrated by a fourth rinsing tank, the material is conveyed to a fourth rinsing tank after being rinsed, and the fourth rinsing tank is conveyed to a fifth dehydrator for dehydration and collection.

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Cleaning method for reusable PET bottles that uses acetic acid instead of lye to avoid stress cracking and clouding in the bottles. The cleaning solution contains acetic acid, surfactants, and optionally other washing-active substances. The acetic acid concentration is up to 5% and the temperature is below 50°C. This allows more washing cycles without degrading the bottles. Acetic acid can be produced from carbonic acid, which is a waste product from incinerators and power plants.

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A recycling and cleaning device for waste plastic bottles that fully cleans the bottles instead of just flushing them. The device cuts the bottles, then cleans the inside and outside using a rotating brush and wash fluid. The cutter feeds bottles into a cleaning chamber where they're rotated and sprayed. The cleaned bottles are collected at the end while waste water exits via a valve.

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Method to improve the quality of recycled plastics by washing them using a hot alkaline solution with surfactant and medicament to remove impurities, discoloration, odors, and pollution spots. The washing conditions involve a specific concentration of alkali, surfactant, medicament, and time. This hot washing method allows recycled plastics to achieve the same quality as virgin plastics.

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Modified PET plastic particle regeneration processing technology to clean and filter modified PET plastic particles for recycling. The processing device has a cylindrical barrel, cleaning unit, and water filtration unit. The cleaning unit has a sector plate, telescoping cylinder, and conical cylinder that rotates and agitates the particles against stationary surfaces. The water filtration unit has a vibrating motor and arc frame to shake and filter the particles. This design provides more effective cleaning of adhered particles compared to just rotating them in water flow.

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High-speed PET bottle washing device for removing foreign substances from PET bottles to improve hygiene and prevent contamination. The device aligns, inverts, and fills the bottles with air to dislodge any particles inside. Multiple bottles are processed simultaneously by gripping them with pads and rotating them upside down. This allows washing a large batch of bottles quickly to reduce the risk of foreign matter being introduced compared to washing individual bottles.

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A fixed-distance ultrasonic bottle washing method and machine that improves efficiency and cleaning by continuously immersing bottles at a fixed distance. The machine has a rotating drum with spray nozzles that clean bottles as they rotate. It also has a fixed-distance ultrasonic chamber with a moving platform to immerse bottles in ultrasonic waves. By synchronizing the rotation and ultrasonic immersion, bottles are cleaned at a fixed distance for consistent results.

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Automated system for washing crushed PET bottles to improve recycling efficiency. The system uses multiple washing stages with ultrasonic cleaning and bubble washing. The stages are: 1) Bubble washing: Crushed bottles are rinsed with a solution containing micro-nano bubbles generated by a bubble generator. 2) Ultrasonic cleaning: The bottles are immersed in a cleaning solution and ultrasonically vibrated to clean. 3) Hot air drying: The washed bottles are blown with hot air to dry. This multi-stage washing process removes contaminants from crushed PET bottles more effectively than conventional methods.

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Recycling PET bottles that can be recycled in the natural environment, are easy to use, and can be recycled in a variety of forms, including PET plastic, plastic fragments with different sizes, PET label paper and PET plastic label pieces. The recycling includes sorting the recovered PET bottles to remove impurities which are not made of PET materials; crushing the sorted PET bottles into PET plastic fragments with different sizes by a wet crusher; removing bottle caps from the PET plastic chips; adding a detergent into the PET plastic chips with the bottle caps removed for cleaning, adding caustic soda flakes, heating for cleaning, and washing the PET plastic chips clean with water; and dehydrating, drying, extruding and granulating the washed PET plastic chips.

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An automated system for efficiently cleaning regenerated PET bottles to prepare them for reuse. The system has a cleaning pool and a lifting platform that moves the bottle into the pool. The lifting platform has vertical guide shafts on the table and a plate with blind holes matching the shafts. A spring compresses the plate to the table. This allows the bottle to be lifted and lowered onto the plate, then raised onto the guide shafts. The plate with the bottle slides into the cleaning pool. The bottle is then lowered into the cleaning liquid. After cleaning, the bottle is lifted back out and lowered onto the plate to drain. The plate can then be removed and the cleaned bottle is ready for reuse.

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A process to recycle polyethylene terephthalate (PET) bottles with improved efficiency and cleaning compared to existing methods. The process involves compressing the bottles into blocks, drying them outdoors, pulverizing and cleaning the blocks, alcoholysing the pulverized particles to extract DMT, crystallizing and purifying the DMT, and extruding it to obtain recycled PET. The key innovations are compressing the bottles before recycling to make a dense block, cleaning the crushed particles instead of whole bottles, and drying outdoors to facilitate cleaning.

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Raw material cleaning equipment for plastic particle processing that can automatically sort, clean, and dry recycled plastic bottles. The equipment has conveyors, a washing tank, a drying chamber, and a sorting mechanism. It uses an electric suction cup and movable arm with camera to sort colored bottles. The washing tank cleans bottles using spray jets. The drying chamber has rotating shelves that lift and fold to move bottles through a filter. This allows simultaneous cleaning and drying without separate steps. The equipment also has a conveyor system to transport the bottles.

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A multi-stage ultrasonic cleaning method for waste plastics like PET bottles and flakes that more effectively removes foreign substances and label adhesives compared to conventional methods. The cleaning process involves sequential steps using ultrasonic vibrations at different frequencies in hot and cold water. This multi-stage cleaning reduces the amount of caustic soda needed for adhesive removal by 30% and improves quality of the final product while reducing washing and rinsing time by 30%. The ultrasonic cleaning steps are: 1) low-frequency ultrasound in hot water with caustic soda, 2) higher frequency ultrasound in hot water with caustic soda, and 3) very high frequency ultrasound in warm water with caustic soda.

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Recycling line and method for cleaning and preparing recycled bottles for reuse that automatically removes stickers and contaminants from both the inside and outside of the bottles. The line has a box cutter, bottle splitter, washer, and turner. The washer has an internal brush to clean the inside and an external peeling gear to remove stickers from the outside. The peeling gear has a sharp tooth tip that contacts the bottle surface to scrape off labels. This allows automated cleaning of both the inside and outside of the bottles without manual intervention.

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Device to sort and clean recyclable materials like glass bottles and plastic bottles more efficiently by automating the flushing process. The device has a rotating guide tube that bottles can be inserted into upside down. A motor rotates the tube while a pump sprays water through holes inside the tube to flush out the bottles. The water falls back into a storage tank, avoiding the need to manually pour out the bottles. This automates the initial cleaning step for recycled bottles before further processing.

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A system and method for recycling and reusing polypropylene (PP) plastic bottles with improved cleaning efficiency and reduced chemical residue. The system uses a base frame, feeding conveyor, and inner/outer cleaning devices. The feeding conveyor guides bottles from intake to cleaning. The inner cleaning device has a clamp that secures the bottle and an internal mechanism that cleans it. The outer cleaning device has a rotating pad that cleans the exterior. The clamp, pad, and conveyor are all detachable for easy replacement and maintenance. This allows simultaneous inner and outer cleaning without leaving residue from the cleaning tools.

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Water washing process for recycling PET bottle flakes to improve cleaning of impurities, oils, and labels from recycled PET flakes to produce better quality recycled polyester filaments. The process involves a three-stage cleaning method. First, the flakes are soaked in ethanol at 45-55°C for 20-30 minutes to dissolve contaminants. Then, the flakes are cleaned in hot cleaning agent (trichloroethylene or acetone) at 70-75°C to further remove impurities. Finally, the flakes are washed with an enzyme cleaning agent and sodium hydroxide solution to neutralize any residual alkali and further clean the flakes.

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