Three-dimensional design and transformation of condenser is carried out to reduce the difference of heat transfer end, improve the vacuum degree of exhaust steam and effectively improve the economy of unit. The unit is transformed from water cooling to air cooling.

Upgrading of Vacuum System of Steam Turbine.

The previous pure hydraulic control system of the old unit is transformed with digital electro-hydraulic control system, which can upgrade the steam turbine control system and meet the requirements of flexible configuration of various control strategies.

Upgrading of steam turbine speed control system.

Steam path upgrading

QNP has introduced and mastered advanced and mature aerothermal design technology from abroad for steam path expansion, efficiency improvement, renovation and upgrading to raise the old steam turbine efficiency, reduce operation cost and increase economic efficiency.

Expansion and Upgrading

The main contents are as follows:

1) Steam turbine expansion and transformation: By optimizing the design of steam inlet passage of steam turbine flow path, the area of flow path is increased, and the capacity of steam inlet and exhaust of the unit is improved, so as to enhance the functional capacity of the unit and increase the economic benefit.

2) Generator expansion and transformation. The capacity of the generator can be improved by reducing the internal losses of the generator, increasing the heat-resistant grade of the insulating materials and strengthening the ventilation and cooling without changing the volume, speed and voltage grade of the generator.

Model modification

QNP has provided the transformation service for many power plants to change the extraction condensing unit into extraction back pressure unit, having accumulated rich transformation experience. QNP can do deep transformation of various types of small and medium-sized steam turbine units, so as to improve the steam supply capacity of existing units and the thermal efficiency of power plants, and obtain the best transformation effect with minimum changes.