Gas distributor, secondary coal gas scrubber and coal gas purifying device for efficient washing and purifying process of coal gas

The utility model provides a gas distributor, a secondary coal gas scrubber and a coal gas purifying device for an efficient washing and purifying process of coal gas. The gas distributor (60) disclosed by the utility model comprises a gas buffering chamber (240), a primary dedusting coal gas inlet pipe (26) and a gas distribution component (620), wherein the gas buffering chamber (240) is arranged at the bottom region of a secondary washing tower (2); the primary dedusting coal gas inlet pipe (26) penetrates through a lateral wall (22) of the secondary washing tower (2) and is inversely and horizontally L-shaped; the gas distribution component (620) comprises annular gas distribution pipelines (622, 623 and 624), a first connecting bridge (640), a second connecting bridge (660) and a gas guide pipe (284), wherein the annular gas distribution pipelines (622, 623 and 624), the first connecting bridge (640) and the second connecting bridge (660) are provided with a plurality of straight holes (628, 624 and 662)