Coal gas purification system adopting rotational flow plate gas-liquid separator

The invention discloses a coal gas purification system adopting a rotational flow plate gas-liquid separator. The coal gas purification system comprises a cylinder body, a lower end guide pipe, the rotational flow plate, a rotational flow separation chamber and an exhaust port, the rotational flow separation chamber is installed in the center of the top of the cylinder body, and a rotational flowplate is arranged in the center of the bottom end of the rotational flow separation chamber; a lower end guide pipe is arranged at the end, away from the rotational flow separation chamber, of the rotational flow plate, a downcomer is fixed to the bottom end of the rotational flow separation chamber on one side of the lower end guide pipe, the exhaust port is formed in the center of the top end ofthe cylinder body, the bottom end of the exhaust port extends into the cylinder body and communicates with the top end of the rotational flow separation chamber, and a gas receiving port is formed inthe outer wall of one side of the cylinder body; and one end of the gas receiving port extends into the cylinder body, and an air injection pipe is installed at the end, away from the cylinder body,of thegas receiving port. According to the invention, the phenomenon of leakage during gas injection of the purification system is reduced, the convenience of the purification system during use is improved, and the integrity of the barrel during use of the purification system is ensured.