How Is the Oil-gas Buffering Function of the Separator Drum Realized in the Waste Tire Pyrolysis Process?

How Is the Oil-gas Buffering Function of the Separator Drum Realized in the Waste Tire Pyrolysis Process?

In the waste tire pyrolysis process, the oil-gas buffering function of the separator drum is realized through its structural design, hydrodynamic characteristics and adaptation to the process rhythm, and this feature is more prominent especially in batch-type processes. The specific implementation paths are as follows:

Volume expansion and speed reduction to buffer flow fluctuations

The cavity volume of the separator drum is much larger than the cross-sectional area of the gas outlet pipeline of the pyrolysis furnace. When high-temperature oil and gas rush from the narrow pipeline into the large-volume cavity of the separator drum at a high speed, the space expands suddenly, and the flow velocity of the oil and gas drops sharply.

This design of "volume expansion and speed reduction" can effectively buffer the intermittent flow peaks of oil-gas output from the pyrolysis furnace. For example, during the vigorous reaction stage of batch-type pyrolysis, the oil-gas output in the furnace will increase suddenly. The separator drum can temporarily store this part of excess oil and gas, avoiding its direct impact on the subsequent condensation pipelines, and preventing problems such as sudden pressure rise and vibration in the pipelines caused by excessive instantaneous flow.

Balancing system pressure to reduce pressure fluctuations

The pressure inside the pyrolysis furnace changes dynamically with the pyrolysis process: the pressure rises slowly during the heating stage, reaches the peak during the vigorous pyrolysis period, and decreases gradually at the end of the reaction.

As a closed buffer vessel, the separator drum is equivalent to the "pressure regulation chamber" of the system. When the pressure inside the furnace rises, the oil and gas will flow into the separator drum, and its volume is used to absorb the pressure, avoiding the direct transmission of pressure to the subsequent system; when the pressure inside the furnace decreases, the oil and gas stored in the separator drum can flow into the subsequent pipelines slowly, maintaining the pressure stability of the subsequent processes and preventing faults such as condensate backflow caused by sudden pressure drop.

Temporary storage and stratification of gas-liquid to stabilize the subsequent gas source

The oil and gas entering the separator drum is not a single gas phase, but a gas-liquid mixed state. Inside the separator drum, heavy oil will settle at the bottom for temporary storage, while light oil vapor and pyrolysis gas will accumulate in the upper part.

This characteristic of "gas-liquid stratification and temporary storage" can filter out the unstable liquid-phase impact in the oil and gas, and only allow relatively uniform gas-phase components to be continuously transported to the subsequent condensation system, ensuring the stability of the gas source flow and composition in the subsequent processes, and avoiding the load fluctuation of the condenser caused by liquid entrainment.