2results about How to "Reduce running power consumption" patented technology

The utility model belongs to the technical field of thermal power equipment, and relates to a high-efficiency combined preheater system of a thermal power plant boiler, which comprises a tubular air preheater arranged at the tail part of the boiler and used for heating primary air and a rotary air preheater used for heating secondary air, flue gas inlets of the tubular air preheater and the rotary air preheater are connected with a flue outlet of the denitration system, flue gas outlets of the tubular air preheater and the rotary air preheater are connected with the dust remover, and a water supply heat exchanger is further arranged between the flue gas inlet of the tubular air preheater and the flue outlet of the denitration system. The rotary preheater can further improve the operation efficiency of a coal power plant, solves the problems of high air leakage, loss and catalyst blockage of a traditional rotary preheater, has the advantages of energy conservation, economy and reliability, and meets the technical requirements of efficient and clean operation of a thermal power plant.

The escalator energy-saving system comprises a first escalator and a second escalator which are opposite in running direction, are driven by a first frequency converter and a second frequency converter respectively and are provided with an energy-saving device. The energy-saving device comprises a first connecting end and a second connecting end which are respectively connected with DC buses of two frequency converters, an energy storage unit, and a first power conversion unit and a second power conversion unit which are connected between the connecting ends and the energy storage unit. The control unit detects bus voltage at the two ends and the state of the energy storage unit in real time and controls the working mode of the power conversion unit according to the bus voltage, and when one escalator goes down for power generation and the bus voltage rises, the control unit controls the corresponding unit to store energy into the energy storage unit; and when the bus voltage is reduced due to the ascending power consumption of the other escalator, the corresponding unit is controlled to release the energy in the energy storage unit for compensation. Automatic cyclic utilization of energy between the two escalators is achieved, electric energy is effectively saved, energy waste is avoided, a power grid is not polluted, the structure is simple, and implementation is convenient.