Chimney with functions of corrosion-prevention, dust-collection and energy conservation

The utility model discloses an efficient chimney with the functions of corrosion-prevention, dust-collection and energy conservation, which comprises a chimney cylinder body (3), and is characterized in that a smoke inlet flue adopts an arc-shaped smoke flue (1) which is positioned on the outer side of the lower end of the chimney cylinder body (3); an outlet (2) of the arc-shaped smoke flue (1) is in smooth connection with the inner wall of the chimney cylinder body (3); and the arc rotating direction of the arc-shaped smoke flue (1) is equidirectional with that of the inner wall of the adjacent chimney cylinder body. Compared with the prior chimney, the utility model has the advantages of stable structure, good environment-friendly effect, prolonged service life and relatively low manufacturing cost, can improve the environment-friendly effect by 25% to 45%, can reduce the self-resistance by 20%, and therefore can reduce the power consumption of an induced draft fan by about 8.5%; and as flue gas whirls in