Bottle Washing in PET Recycling - Xray

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Sustainability and the environmentally friendly use of resources are the principles at the heart of RCS's corporate philosophy. They run through every aspect of its operation, such as the advanced processes it uses to collect and transform waste into secondary raw materials, returning them to the production cycle. These core values also form the basis for its service to clients, as it works in partnership with them to develop a concept that is environmentally friendly and individually tailored to their needs. 

An important area of focus for RCS is the recycling of PET bottles to produce plastic flakes for a variety of applications and high-quality regranulate for the food sector. This activity is centered at its sorting plant, where it separates clear PET from color PET - which account for 85 percent of the input - aluminum and ferrous cans, film and other materials. With a capacity of 7 tonnes/hour, the plant operates on a continuous shift system, processing used PET bottles into high-quality food grade plastic flakes.

The purity of the flakes is of paramount importance, as they are destined to the production of a variety of plastic products, from  plastic fibers to  films and packaging tapes, as well as products for the food industry. Every outgoing Big Bag is carefully checked for residual moisture, bulk density, incorrect colors and contaminants, as well as grain size distribution and adhesive residues to ensure the quality of the output. 

In order to achieve both the consistent high purity it requires and optimize the processes at its plant, RCS has relied on STADLER over the years: "We had already purchased a ballistic separator from STADLER in ," says Gerd Francke, joint CEO of RCS. "On the basis of the good experience with their technology, we decided again to choose STADLER for a new ballistic separator in ." 

This was followed by a complete modernization of the plant in : "STADLER offered us the complete package, from project planning to the construction of the modernization of the entire plant, managed and implemented by their staff," explains Alexander Rimmer, joint CEO of the company. "We particularly appreciated their technical know-how and the support during the entire project. Their advice was flawless and they offered us great technical experts who advised not only on the technology and processes, but also on the implementation possibilities specifically adapted to our technical requirements with good solutions to problems."

The completion of the project within very tight deadlines was a key requirement for RCS, and STADLER delivered on this important demand: "What particularly convinced us was that they followed our tight schedule and were able to meet our expectations," adds Alexander Rimmer.

The modernization has brought multiple benefits to the sorting plant - not only on the quality of the output, but also on its operation and running costs, to the satisfaction of RCS's CEOs: "The biggest advantage was a triple increase in quantity, quality, and yield. In addition, work processes have become easier for our employees. Also, the STADLER equipment is very durable, and therefore requires less maintenance. As a result of the modernization and the simplified maintenance, costs and workflows could be optimized."

The recycling industry is in constant evolution, as the packaging used by manufacturers changes over time. This is the case of PET bottles, which are increasingly packed in "full-body" sleeves: "To optimize sorting and achieve better quality for our customers, the separation of label and PET bottle must take place before sorting," explains RCS's CEO.

Once again, RCS turned to STADLER for a solution to this new requirement: "with the STADLER Label Remover the labels are stripped off and the PET bottles are less damaged than with other manufacturers. As a result, we can register less fine abrasion," concludes Alexander Rimmer.

STADLER's Label Remover - launched in with the name Delabeler - removes labels from bottles of all types, achieving a quality standard of up to 80 percent of labels removed. It processes a mass flow of up to 9 Tn/h - depending on the particle size and material composition. It stands out for the robust construction that is the hallmark of STADLER equipment and is highly resistant to impurities. These features result in excellent durability and a consistently high performance throughout its long life cycle.

The STADLER Label Remover has been in operation at the RCS PET sorting plant, where it has proved to be an effective solution: "We are very satisfied with the Label Remover because it requires less maintenance and its throughput is geared to that of our plant. With this machine, there is less wear on the knives and the machine is not very susceptible to impurities such as foil or wood. In addition, it does not cause any damage to the PET bottles. With the Label Remover, we can separate the labels from the bottles before sorting, which enables us to guarantee a consistently high level of purity," concludes Alexander Rimmer.

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