Abstract
The first phase of a power plant has two subcritical 300 MW units, and each boiler feed water pump is equipped with two with 50% capacity steam driven feed pumps and one 50% capacity electric start-up feed pump. The two steam pumps are put into operation during normal operation. After the heat supply transformation in the unit of the first phase of this power plant and based on the calculation and analysis of the heat balance of the unit, it is found that there will be insufficient output of the feed pump due to the insufficient steam source after the flow-through transformation, which will affect the water supply of the unit and reduce the energy utilization rate. To avoid this, the steam source of feed pump turbine needs to be selected again. Taking the original steam turbine condition of feed pump and the original steam source of feed pump turbine as the research basis, this paper makes analysis on the steam source transformation, and concludes the scheme of steam source selection and reconstruction based on energy matching. The feasibility of the scheme is tested and verified finally.
Highlights
Nowadays, sustainable development strategy is the common development direction of all countries, and it is the consensus of all mankind (Qin, 2014; Guo, Luo & Ye, 2014)
Compared with the traditional thermal power generation, the utilization rate of coal can be increased by about 15% with cogeneration, while the central heating efficiency of thermal power plant boilers can be increased by more than 30% compared with the decentralized heating efficiency of traditional small boilers (Zhang, E, Liu, Wang, Gan & Liu, 2013; Pan, Liu & Lei, 2020)
This paper takes the original feed water pump turbine condition and the original feed water turbine steam source as the research basis of steam source transformation, through the steam source transformation analysis, this paper concludes the steam source selection transformation scheme based on the energy matching, and tests and verifies the feasibility of the transformation scheme
Summary
Sustainable development strategy is the common development direction of all countries, and it is the consensus of all mankind (Qin, 2014; Guo, Luo & Ye, 2014). Based on the above-mentioned needs, this power plant actively responds to the national policy of vigorously developing the cogeneration industry, aiming at improving the energy utilization efficiency as well as unit reliability and flexibility, to meet the needs of new heat users in the future. This promotes the healthy and sustainable development of the company that this power plant is affiliated, and maintains the competitiveness of the company. This paper takes the original feed water pump turbine condition and the original feed water turbine steam source as the research basis of steam source transformation, through the steam source transformation analysis, this paper concludes the steam source selection transformation scheme based on the energy matching, and tests and verifies the feasibility of the transformation scheme
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