Waste Plastic Mulch Recycling Pyrolysis Machine: Process Flow & Technology

Waste plastic mulch/plastic film pyrolysis is an innovative waste recycling technology that transforms discarded plastics into valuable fuel oil through high-temperature thermal decomposition. DOING Group's plastic mulch recycling pyrolysis machine integrates a comprehensive process flow, including pretreatment, pyrolysis, condensation, and final products collection, enabling the efficient recovery of plastic film into fuel oil, syngas, and carbon black.

Waste plastic mulch/plastic film recycling pyrolysis into fuel oil

Here's a detailed breakdown of our waste plastic mulch recycling pyrolysis machine's process flow:

1. Raw Material Pre-treatment:

The initial step involves sorting the waste plastic mulch to remove impurities such as cotton, straw, soil, and stones. This crucial stage prevents contamination of the final oil product and protects the equipment from abrasion during the pyrolysis process. After sorting, the relatively clean plastic mulch can be either baled or shredded, facilitating easier feeding and more efficient subsequent pyrolysis reactions.

2. Pyrolysis Reaction:

The baled or shredded plastic mulch is fed into the pyrolysis reactor via an automatic hydraulic feeding machine or manually by a grab machine. Once the reactor door is sealed, the heating system is activated, subjecting the plastic mulch to high-temperature thermal decomposition in an oxygen-free environment. Typically, the heating temperature ranges between 260°C and 320°C. Under this high heat, the long-chain polymers in the plastic begin to break down into shorter-chain hydrocarbons.

Waste plastic mulch recycling pyrolysis machine

3. Oil Gas Condensation and Collection:

Oil gas production commences when the reactor temperature reaches 160°C. The most prolific oil output phase occurs between 260°C and 280°C. The oil gas exits from the rear of the reactor, entering a buffer tank to stabilize the flow rate and allow partial settling of carbon black impurities.

Following buffering, the oil gas sequentially passes through a multi-stage condensing system, including a vertical condenser, oil-water separator, horizontal condenser, and a condensing tower. Through heat exchange with circulating cooling water, the oil gas is condensed into liquid oil, which is then collected and stored in an oil tank.

4. Carbon Black Separation

Upon completion of the pyrolysis reaction, the carbon black discharge port is opened. The reactor is rotated, and the carbon black is collected via the carbon black discharge system.

5. Environmental Control

The remaining non-condensable gas is treated by the gas purification and deodorization system. This purified syn-gas is then recycled back into the reactor’s heating furnace as fuel, significantly reducing external fuel consumption. The flue gas generated during the pyrolysis and syn-gas combustion processes is meticulously treated by desulfurization, denitrification, and dust removal equipment. This ensures that emissions meet environmental standards, guaranteeing a smoke-free and odor-free operation, thereby complying with environmental impact assessment and acceptance criteria.

Environmental gas purification system of plastic mulch recycling machine

This completes the comprehensive process flow of DOING Group's plastic mulch recycling pyrolysis machine. We offer a wide range of specifications and models, including:

With such a diverse array of plastic mulch recycling pyrolysis plant specifications, how do you choose the right one for your needs?

It's simple, you can determine your ideal solution based on three key points:

①Raw Material Characteristics:

Composition, type, and relevant parameters of your raw material.

Moisture content and impurity levels of the raw material.

Does the raw material require pre-treatment?

②Feeding Method to Pyrolysis Reactor:

How will the raw material be loaded into the pyrolysis furnace?

③Carbon Black Discharge Method:

How will the carbon black residue be removed from the furnace after pyrolysis?

Plastic recycling pyrolysis machine manufacturer one-stop services

By clarifying these three points step by step, we can accurately match you with the appropriate pyrolysis technology and equipment. For more detailed information about our waste plastic mulch recycling pyrolysis machines, please feel free to call us. DOING Group’s engineers will be delighted to provide expert equipment selection advice and customized configuration solutions tailored to your specific requirements.