This article introduces the roles played by the frequency-conversion speed adjustment technology in such facilities as blast, draught fan and water pump in heating system.

The paper presents the tripping of air induction steam turbines of Primary reformer in Fudao second stage ammonia plant,analyzes the reasons for steam turbines tripping during overhaul,puts forward relative countermeasures,which have achieved good results.

Aiming at problems of easy accumulation of gas at corners of coal mine face worked,develop fan which is proper to keep work under the particularity environment,add a new of method for controlling the accumulation of gas at corners of coal mining face worked,gained all right result in the coal enterprise application.

Discussion on integration modes of induced draft fans and booster fans;

Application of Frequency conversion in induced draft fan and energy saving analysis;

Energy saving efficiency comparing before and after using frequency control of electric-machine speed for boiler induced draft fan in Shaoguan power plant;

9%, and the dropping reduce to 0, it made this equipment can reposeful and credible run; Introduce technology of parallel-flow induced air, to satisfy .

The discussion of the energy-saving rebuilding method for the induced draft system of a power plant in the Steel Enterprises;