Hedging type double-backflushing system

The invention discloses a hedging type double-backflushing system, which comprises an upper backflushing structure and a lower backflushing structure, wherein the upper backflushing structure and thelower backflushing structure are not connected and are of a central symmetry structure, the upper backflushing structure and the lower backflushing structure are both semi-closed cylinder assemblies,each semi-closed cylinder assembly comprises a lightning arrester electrode (1), an arc guide ring (2) and a backflushing pipeline (3), one end of each backflushing pipeline (3) is open, the other endof each backflushing pipeline (3) is fixedly provided with the lightning arrester electrode, the arc guide ring (2) is mounted at the open end of the backflushing pipeline (3), the hedging type double-backflushing system further comprises a partition plate (4) and an arc guide electrode (5), an electric arc is dragged into the backflushing pipeline through the arc guide ring, and backflushs out of the backflushing pipeline