Mingjie industrial plastic pyrolysis plant is a waste plastic processing and recycling line, designed for waste municipal plastics, marine plastics, and medical plastics. As a leading Chinese manufacturer of pyrolysis technology and equipment, Mingjie Group boasts an advanced pyrolysis technology R&D and equipment manufacturing industrial park.
We are committed to developing comprehensive, environmentally friendly continuous pyrolysis solutions. Our industrial plastic pyrolysis plants have been used in solid waste pyrolysis projects in multiple countries.
The entire industrial plastic pyrolysis plant consists of eight major systems: feeding, pyrolysis, heating, condensation, separation, slag removal, purification, and electronic control system. The industrial plastic pyrolysis plant produces high-value-added products, such as pyrolysis oil, carbon black, and syngas. It is suitable for large-scale commercial operations.
Continuous Industrial Plastic Pyrolysis Plant Workflow
Feeding Process
The feed system pushes the material into the pyrolysis reactor, which is then ignited and begins pyrolysis.
Heating Process
The combustion chamber uses syngas for combustion and heating, raising the temperature. The industrial plastic pyrolysis plant is started using diesel or natural gas, taking approximately one hour. The pyrolysis equipment is equipped with a digital temperature controller, which automatically controls the furnace temperature at 400-450°C.
Pyrolysis Process
The plastic pyrolysis process of industrial plastic pyrolysis plant proceeds layer by layer, from the outside in. The plastic pyrolysis products are gas and solid phases: the gas phase consists of hydrocarbons with varying carbon numbers, while the solid phase consists of residual carbon from high-carbon organic matter.
The gas phase exits the furnace chamber due to the pressure differential caused by the temperature difference between the inside and outside of the pyrolysis furnace. It is then condensed in the condensation stage as pyrolysis gas, and the remaining carbon residue is cooled and packaged as the product.
The continuous industrial plastic pyrolysis plant allows continuous pyrolysis, and the pyrolysis gas in the main furnace is drawn out of the furnace under a slightly negative pressure process. Carbon black is conveyed by the screw propeller into the carbon black slag discharge system.
Product Separation Process
The pyrolysis oil and gas exiting the pyrolysis reactor enter a gas separator, where gravity sedimentation removes fine dust from the oil and gas. It then enters a condenser, where most of the remaining gas in the system is extracted. The condensable portion is converted into liquid and passed through a separator tank to an oil storage tank, while the non-condensable portion enters a purification system.
The condensation system of industrial continuous plastic pyrolysis plant utilizes a tube condenser, cooled by water. Cooling water is supplied by a circulating water tank.
Oil Gas Separation
The oil and water are separated in the separator tank, producing a small amount of oily wastewater. Fuel oil is stored in an oil storage tank. The non-condensable gas is evacuated to a vacuum in the buffer tank by a vacuum pump. Under the vacuum pressure, the non-condensable gas passes through the condenser, enters the alkaline cleaning and purification unit.
The remaining exhaust gas after condensation is primarily low-carbon hydrocarbon flammable gas. After passing through two safety devices, a water seal and a flashback arrester, it is fed into the cracking furnace combustion chamber as fuel. It is fully burned at the furnace bottom to provide the required energy for the cracking furnace.
Carbon Black Collection
The carbon black is conveyed by a spiral slag cooler into carbon black packaging bags. Circulating cooling water is introduced through the outer wall of the slag cooler, reducing the carbon black temperature to below 40°C during the spiral conveying process. The carbon black slag discharge is fully enclosed.
Safety Monitoring
The pyrolysis furnace, steam drum, and settling tank are equipped with temperature control systems and pressure gauges. The separation tank is also equipped with a pressure gauge. Both the temperature control system and pressure gauges are remotely monitored.
They monitor the pressure and temperature of the main processor and key systems. Automatic alarms are generated in the event of any abnormality, ensuring the safety of the plastic-to-fuel oil process.
Flue Gas Treatment System
The post-combustion flue gas first passes through a heat exchanger to dry the waste plastic. It then enters a comprehensive flue gas treatment system to achieve standard discharge. The industrial plastic pyrolysis plant utilizes a special emission purification system, including water spray dust reduction, alkali wash spray tower, UV photolysis, activated carbon adsorption.
