The Cooling Water Tank is Adapted To The Batch Pyrolysis Process

The cooling water tank is adapted to the batch pyrolysis process, with indirect heat exchange of circulating water as the core, and completes the condensation and cooling of oil gas in 4 steps with a closed-loop operation throughout. The process is as follows:

Preheating before pyrolysis: Fill the tank with water, start the circulating pump and cooling tower to establish a tank-cooling tower circulation, pre-cool the water temperature to 25-35℃, inspect the pipelines and instruments for normal operation, and stand by.

Gas condensation during pyrolysis: 300-500℃ high-temperature oil gas enters the tank, its residence time is extended by baffle plates, and it undergoes indirect heat exchange with counter-current cooling water. The oil gas is rapidly cooled to ≤40℃ and condensed into liquid oil, which flows into the oil-water separator, and the non-condensable gas is discharged to the tail gas system.

Cooling water cooling for reuse: The cooling water that has absorbed heat (outlet temperature ≤45℃) flows back to the cooling tower for cooling, and then is sent back to the tank for circulation to maintain continuous heat exchange.

Waste heat cooling after furnace shutdown: After the pyrolysis furnace is shut down, keep the water circulation running to cool the residual oil gas generated by the waste heat in the furnace, and gradually shut down the circulation system only after the system cools down to a safe temperature.