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How to Reduce the Power Consumption of a Thermal Power Plant by 1%?

Date: 2015-10-28
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 How to Reduce the Power Consumption of a Thermal Power Plant by 1%?
Guangzhou Zhiguang Energy-saving Co., Ltd.: An Overview of Energy Conservation Renovation Results
      
Over the past three years, Guangzhou Zhiguang Energy-saving Co., Ltd. has successively finished the energy conservation renovation projects of 47 electric variable-speed feed pumps with hydraulic couplers for 13 power plants and 26 units. These projects cover eight provinces and autonomous regions in China. Its independently-developed energy conservation renovation technology for the feed pump system has led to the reduction of the power consumption of power generation enterprises by 1% and the safe and stable operation of their equipment, as well as the possible recovery of their renovation costs in shorter periods. Consequently, it has been widely accepted in this industry. Zhiguang has been granted many national patents and passed the technological achievement appraisal conducted by the China Electricity Council ("CEC"). Its technical solutions approach advanced international levels.
       
As early as April 2014, the energy conservation renovation project of the Maliantai Power Plant for its electric feed pump system passed such appraisal conducted by the CEC. It was determined by all experts of the appraisal committee that domestic high-power frequency converters were applied in electric feed pump units of a 300,000 KW thermal power generation unit in such project for the first time and that the overall technology in such project was up to advanced international levels. Therefore, it was suggested to promote its application in thermal power generation units of 300,000 KW and above.
       
 
26 units were successfully renovated, resulting in economic and environment protection benefits.
      
On October 8, 2012, the first energy conservation renovation project, which was implemented by Guangzhou Zhiguang Energy-saving Co., Ltd. regarding the electric feed pump system of a domestic 330,000 KW unit, was put into operation in the Maliantai Power Plant. This resulted in its average annual power saving of 13,780,000 kWh (equivalent to 4,423 t standard coal) for three consecutive years. It is known that, since the safe and reliable operation of the Maliantai Power Plant, Zhiguang's energy conservation technology for electric feed pump systems with energy-saving boilers has also been applied in many other power plants successively, such as the Liupanshan Power Plant, Linfen Thermal Power Plant, Power Plant of Aluminum Corporation in Lanzhou, Shizuishan Power Plant, Tongliao Power Plant, Huaze Power Plant, Fenyi Power Plant and Taizhou Power Plant. With a coverage of eight provinces and autonomous regions in China, such projects include 47 electric variable-speed feed pumps with hydraulic couplers for 13 power plants and 26 units. The maximum motor capacity is 6,300 KW / 6 KV and the maximum frequency converter capacity is 8,000 KVA / 6 KV.
      
The energy saving effect after renovation is significant. As introduced by Wang Lidi, director of Zhiguang's research institute of energy conservation technologies for power plants, the maximum reduction in the plant power consumption among those 13 renovation projects was nearly 1%; the maximum power saving rate per unit was up to 26% (80% average annual load rate); and the maximum average annual power saving was up to 17,000,000 kWh.
     
      
Source: China Electric Power News

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