Working Principle of Intermittent Refining Equipment

Working Principle of Intermittent Refining Equipment

Intermittent refining equipment mainly operates based on the principle of high-temperature oxygen-free pyrolysis, and the whole process is completed in batches. The details are as follows:

Sealed Feeding

Raw materials such as waste tires, waste plastics and oil sludge are first loaded into the pyrolysis furnace. Then the furnace door is closed and sealed to form an oxygen-deficient or oxygen-free environment inside the furnace, preventing the raw materials from burning and allowing only decomposition.

Heating and Pyrolysis

The furnace is heated by an external combustion system until the temperature reaches about 350°C to 460°C. Under high temperature, the macromolecular organic chains in the raw materials break down and turn into oil-gas mixture.

Oil-Gas Condensation

The high-temperature oil-gas mixture enters the condensing system. After cooling, the condensable part is liquefied into fuel oil and collected in oil tanks.

Recycling of Combustible Exhaust Gas

The non-condensable part of the oil-gas is combustible exhaust gas, which is sent back to the combustion chamber as fuel to continue heating the furnace, realizing heat recycling and saving energy.

Cooling and Slag Discharging

After the pyrolysis reaction is finished, heating stops and the furnace cools down naturally. When it reaches a safe temperature, the furnace door is opened to discharge solid residues such as carbon black, steel wires and furnace slag, completing one production cycle.

The whole process runs batch by batch intermittently, with one cycle finished before the next starts, so it is called intermittent refining.