Solar and industrial waste heat cogeneration system

Abstract

The invention discloses a solar and industrial waste heat cogeneration system, in particular to a Rankine cycle system for assisting industrial exhaust heat generation by utilizing a solar thermal collector. In the solar and industrial waste heat cogeneration system, a solar thermal collector, an intermediate heat exchanger and a work medium pump are sequentially connected in series to form a cycle; and the intermediate heat exchanger, an exhaust heat boiler, a steam drum of the exhaust heat boiler, a steam turbine, a power generator, a condenser, a deaerator, a water feeding pump and other equipment form the Rankine cycle generation system. A single pressure system or dual-pressure system can be adopted according to different parameters and different forms of the steam turbines, wherein in the single pressure system, the intermediate heat exchanger is used as the evaporator of the exhaust heat boiler and integrated with the exhaust heat boiler system for jointly producing superheated steam working medium; and in the dual-pressure system, the intermediate heat exchanger and a flash evaporator are used as independent equipment to be integrated with the exhaust heat boiler system. The system provided by the invention is beneficial to increasing the generated energy of generator sets for industrial exhaust heat generation, reducing the influence of the fluctuation of industrial exhaust heat to the generated energy, and simultaneously reducing the investment to simple solar thermal generation.

Description

Technical field [0001] The invention belongs to the technical field of solar thermal power generation systems, and specifically relates to a Rankine cycle system that utilizes solar thermal collectors to assist industrial waste heat for power generation. Background technique [0002] Solar thermal power generation is one of the ways to convert solar energy to high-quality energy. Foreign studies have shown that the annual solar radiation is higher than 1300kWh / m 2 In some areas, the economics of using solar thermal power generation is higher than that of photovoltaic power generation systems. However, the low density, intermittentness, and uneven spatial distribution of solar energy also put forward high requirements for the collection and utilization of solar energy. According to foreign research and demonstration operations, various forms of solar thermal power generation systems have been developed, and the single-unit capacity has also developed from kilowatts to megawatts. ...

AI Technical Summary

Problems solved by technology

However, no matter what kind of heat collector is used, in a pure solar thermal power generation system, the mirror field of the heat collection system occupies a large area, and the investment of the heat collector accounts for a large proportion, and a heat storage system needs to be installed. Under the advanced technology, the cost of heat storage equipment is very high, which also increases the complexity of the system

At the same time, in terms of industrial waste heat power generation, due to the influence of the production process, the unit often cannot reach its designed power generation capacity, and the equipment capacity has not been fully utilized.

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