Graded solar assisted coal-fired power generation system

Abstract

The invention puts forward a graded solar assisted coal-fired power generation system. Different kinds of solar collectors are coupled with different sections of heaters according to different heat collecting grades of the solar collectors, a flat plate vacuum tube heat collecting system (ET) is connected in parallel to a part of medium pressure heaters, a groove type solar heating system (PT) isconnected in parallel to a part of high pressure heaters, solar heat is utilized to replace the high quality steam extracted from a steam turbine of a coal-fired power station to heat feedwater, and the saved extracted steam can continue to do work in the steam turbine. The complementation and comprehensive gradient utilization of solar energy and conventional thermal power coal-fired units are realized, the steam extraction capacity of high pressure cylinders and intermediate pressure cylinders in the steam turbine is reduced, partial coal-fired consumption is reduced, the cost is reduced, and the graded solar assisted coal-fired power generation system has good economy.

Description

Technical field [0001] The invention belongs to the technical field of solar power generation, and particularly relates to a hierarchical solar-assisted coal-fired power generation system. Background technique [0002] At present, the technologies related to the present invention mainly include solar-assisted coal-fired power generation technology, trough solar heat collection technology and flat vacuum tube technology. The development status and characteristics of their respective technologies are as follows: [0003] 1. Solar-assisted coal-fired power generation technology [0004] China’s energy structure of “rich coal, lean oil, and less gas” determines that China is a country that consumes coal as the main energy source. Although China is gradually adjusting its energy structure to reduce its dependence on fossil fuels, China’s current electricity It is still achieved through coal-fired generating units. Coal consumption in China's power generation accounts for more than 50% of...

AI Technical Summary

Problems solved by technology

The disadvantage is that due to the high temperature of the oil, the high temperature resistance of the main circulation components, the high cost of the oil, and the fact that it is easy to age at high temperatures, once it leaks, it will pollute the environment and cause fires, etc., resulting in the improvement of the thermal performance of the system and the reduction of costs. restricted

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