Cómo funciona una línea de lavado de botellas PET

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How does a PET bottle washing line work? PET bottle washing line is a complex system consisting of several components, each of which plays an important role. In this article, we’ll take an in-depth look at the components of a PET bottle washing line to understand how it works and explore ways to help you optimize your recycling process.

Cómo funciona la línea de lavado de botellas PET

 

PET bottle washing line shredding and sorting

Crushing stage:

  • Breaking PET bottles into smaller pieces
  • The crushing stage is a critical step in the PET bottle washing line, aiming to crush the collected PET bottles into smaller pieces. This process is accomplished by a mechanical crusher equipped with rotating blades or hammerheads that break the bottles into small pieces at high speeds.

Sorting stage:

  • Sorting snacks according to color and quality
  • After shredding, the PET bottles enter the sorting stage, where the pieces are sorted according to color and quality. Sorting is usually done using an optical sorter, which emits different wavelengths of light and detects the light patterns reflected from the object. By analyzing the light patterns, the sorter can distinguish between different colored PET chips and collect them separately.

 

PET bottle washing line chemical treatment and mechanical cleaning

After the crushing and sorting stage, PET flakes move on to the chemical treatment and mechanical cleaning stage. This stage is critical because it removes residual waste from the bottles, such as glue, label residue, and potentially harmful chemicals.

Chemical Treatment

  • A robust alkaline solution, such as sodium hydroxide or carbonic acid, reduces and reaches organic solvents. Soak trace elements in the chemical solution for a long time to ensure thorough cleaning. Add surfactants to enhance the penetration of the chemical solution.

Limpieza mecánica

  • Bottle flakes are passed through mechanical devices that rub and rinse. Hot water or steam is used to soften and promote quality.
  • Rinsing and Drying in PET Bottle Wash LinesAfter chemical treatment and mechanical cleaning of the plastics, PET flakes enter the rinsing and drying stage of the cleaning process. The purpose of this stage is to remove residual chemicals and moisture and ensure that contaminants meet quality specifications.
  • DryingThe rinsed pellets are fed into a dryer that utilizes hot air to remove moisture. The drying temperature and time are precisely controlled to ensure complete drying of the pellets. 
  • Quality Inspection Quality inspection of the rinsed and dried contaminants is performed to ensure compliance with the following standards: Contaminant Chemical Substance Content: Below nationally specified contaminants. Contaminant content: below the specified specifications to prevent the formation of lumps. Appearance: Granule particles should be clean and not require drying.

PET pellets have reached chemical residues and moisture through the rinsing and drying stages, and they are ready for subsequent bottle tablet storage or Granulation.

Rinsing and drying of PET bottle washing lines
ArtículoPropósitoMethodsQuality Inspection Criteria
RinsingExcessive Chemical SubstancesHigh-pressure water flow, multi-stage program, monitoring rinse water quality.The content of the toxic chemical substance is lower than that of the wastewater specified in the regulations.
DryingObtaining WaterDryer, hot air, temperature and time control,  water removalMoisture content below specified specifications to prevent caking
Quality InspectionDetermination of compliance with specificationsChecking residual chemicals, moisture content, appearanceThe content of the toxic chemical substance is lower than that of wastewater specified in the regulations. Fragments are clean and undamaged.

 

PET bottle washing line for pellet or scorch production

In the final stage of the PET bottle washing line, the washed flakes will undergo the following processes to produce reused pellets or dyes:

Pelletizing

  • Melting and filtering of the washed waste.
  • The mold of the spindle will be passed through the nozzles of the granulator to form small pellets.
  • It will be cooled and solidified to form round or irregularly shaped pellets.

Discoloration

  • Melt and filter the cleaned waste.
  • Squeeze the harmful gel through the tumbler to form brightness.
  • Will scorch and cure to form uniformly cooled scorch.

Packaging and storage

  • Pack or into bags or hopper pellets.
  • Store the packaged pellets or fermentation in a dry, well-ventilated environment.
  • The product is for reuse in the manufacture of new PET pellets.

The end product of the PET bottle washing line is a high-quality pellet or luster that can manufacture various new PET products, such as bottles, fibers, and films. Reusing these materials reduces environmental impact and promotes recycling resources for reuse.

can refer to  **PET bottle washing line**

 

Conclusión

To summarize the above, a PET bottle washing line is a complex system that contains a series of interrelated components. From crushing and sorting to chemical processing and mechanical cleaning to rinsing, drying, packaging, and storage, each step ensures that PET bottle waste is of the best possible quality.

Understanding the components of a PET bottle washing line and their functions can help promote more efficient and environmentally friendly PET recycling.

 

PREGUNTAS FRECUENTES

How does the washing stage of a PET bottle washing line work?

  • The cleaning stage uses a robust alkaline solution to remove operations, stickers, and foreign objects from the bottles. The solution comes into contact with the bottles in a high-speed rotating tray, effectively removing the bottles.

How does the chemical treatment and mechanical cleaning work in a PET bottle washing line?

  • Chemical treatment uses a chemical solution such as caustic soda or sodium hydroxide to remove organic matter from the bottles. Mechanical cleaning, however, uses friction and rinsing to enhance further solutions that the solution cannot remove.

What is the purpose of the rinsing and drying stages of a PET bottle washing line?

  • The rinsing stage uses water to remove chemical solution residues. The drying stage uses hot air to dry the bottles, ensuring the pellets or activation are dry and water-free before storage.
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