How to remove wax from Polyethylene plastic pyrolysis process?

Plastic is a valuable raw material for oil recovery through pyrolysis. Around 5% of the extracted oil from underground resources is used in the production of plastic materials. In its raw state, plastic consists of various hydrocarbon polymers, which, through the thermal pyrolysis process, can be broken down into smaller carbon chains, yielding fuel oil.

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However, due to the higher paraffin wax content in plastics, which complicates the pyrolysis process. As the temperature rises during pyrolysis, paraffin wax can solidify, potentially causing blockages in the oil and gas pipelines. This can lead to operational difficulties and frequent cleaning requirements.

To address this issue, there are two primary solutions to remove the wax from Polyethylene plastic pyrolysis process:

1. Physical Removal of Wax

One solution is to physically remove the wax generated during the pyrolysis process. By leveraging the high freezing point of paraffin wax, it can be collected and returned to the reactor for further processing. This method significantly reduces the risk of pipeline blockages and minimizes the frequency of oil pipe cleaning. By recycling the wax back into the system, this approach ensures that the wax is further decomposed into useful products, improving the overall efficiency of the process.

Physical removal of wax for polyethylene plastic pyrolysis machine

2. Chemical Removal of Wax

Another solution involves the use of special catalysts to chemically break down the wax. These catalysts are designed to react with the wax, facilitating its removal. The catalysts are typically made from modified materials with optimized pore structures, surface areas, and structural stability. These catalysts are capable of cracking the plastic additives, enhancing the wax removal process. Additionally, they help prevent the deposition of coke precursors in the molecular sieve channels, thus extending the catalyst's lifespan and reducing maintenance. This chemical method also improves the quality of the oil products produced during pyrolysis, ensuring higher efficiency.

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Apart from the above two solutions, we also can pay attention to the daily cleaning of the polyethylene plastic pyrolysis machine and the pyrolysis pressure and temperature control of the equipment to ensure uniform temperature distribution within the equipment, which both can reduce the wax forming and the damage caused by plastic wax deposition to equipment operation to a certain extent.

For further information or inquiries about our polyethylene plastic pyrolysis machine design and solutions, please feel free to contact us anytime. We are happy to provide more details and assist you in optimizing your pyrolysis process.