Paraboloid trough type solar heat-collector auxiliary coal-burning boiler mixing heat power generation system

Abstract

The invention belongs to the generating equipment scope and in particular relates to a mixed heat power generating system with a paraboloid groove type solar heat collector to assist a coal burning boiler. A solar heat collector field is connected with a feed pump and a second or a third high-pressure heater; a condenser, an extraction pump, a low-pressure heater, a deaerator, the feed pump, the high-pressure heater, the coal burning boiler and a steam turbine are connected in series in turn; and the steam turbine drives a dynamo and discharges steam to the condenser. Condensed water flows out from the condenser and is heated up and pressurized up by a the low-pressure heater, deoxidized by the deaerator, fed with water by a leading-out part of the feed pump and enters the solar heat collector field for heat absorption; after reaching a stream drawing parameter of a certain stage high-pressure heater, the condensed water returns and joins the drawing gas of the corresponding stage heater; the other part of feeding water enters the coal burning boiler through the high-pressure heater and becomes steam with high temperature and high pressure; and the steam enters the stream turbine, applies work and flows into the condenser to complete a thermodynamic cycle. The mixed heat power generating system with the paraboloid groove type solar heat collector to assist the coal burning boiler reduces coal consumption of a coal burning unit, improves thermal efficiency of the solar heat power generation and reduces the investment on the simple paraboloid groove type solar heat power generation.

Description

technical field [0001] The invention belongs to the scope of power generation equipment, in particular to a hybrid thermal power generation system in which a parabolic trough solar heat collector assists a coal-fired boiler. Background technique [0002] The work of energy conservation and consumption reduction has received unprecedented attention from the government. As a thermal power plant that consumes more than 50% of the country's total coal consumption every year, the energy-saving task is of great significance. The potential for saving coal in coal-fired power plants using conventional energy-saving methods is gradually decreasing. [0003] DSG solar collector is a kind of parabolic trough solar collector. Its working principle is: the parabolic reflector reflects and gathers the incident solar energy to the absorber located at the focus of the reflector, and the water in the absorber absorbs solar heat energy Then the temperature rises. In the test, the outlet wa...

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Problems solved by technology

The reduction of coal resources and serious pollution to the environment are the biggest drawbacks of this power generation technology

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