Solar energy and biomass energy combined power generation optimizing integrated system

Abstract

The invention provides a solar energy and biomass energy combined power generation optimizing integrated system. The system comprises an ultrahigh pressure or high pressure solar energy photo-thermal boiler system, an ultrahigh pressure or high pressure biomass boiler system and a turbonator system, wherein high temperature conduction oil output by a solar energy light field of the solar energy photo-thermal boiler system flows through a photo-thermal evaporator and a photo-thermal heater in sequence, and returns to a conduction oil storage tank after heat release cooling; low-temperature conduction oil in the conduction oil storage tank is conveyed to the solar energy light field by an oil circulating pump to complete conduction oil circulation, and meanwhile photo-thermal transmission and heat exchange are realized; photo-thermal steam produced by the photo-thermal evaporator is conveyed to the biomass boiler system by a steam primary pipe; an auxiliary fuel coal or fuel gas or fuel oil boiler is connected with the photo-thermal evaporator and the photo-thermal heater in parallel; auxiliary steam produced by the auxiliary fuel coal or fuel gas or fuel oil boiler is mixed with the photo-thermal steam by the steam primary pipe and then is conveyed to the biomass boiler system; photo-thermal mixed steam and steam which is produced by a biomass boiler are overheated to 540 DEG C+ / -5 DEG C in the biomass boiler system; overheated steam is conveyed to a steam turbine to swell and do work and drives a generator to generate electricity. According to the solar energy and biomass energy combined power generation optimizing integrated system, solar energy and biomass energy are combined, the installed capacity of a power plant is expanded, and the economic benefit of a united power plant is improved.

Description

technical field [0001] The invention relates to the technical field of renewable new energy, that is, the technology of joint power generation of solar energy and biomass energy, and specifically refers to an optimized integrated system for joint power generation of solar energy and biomass energy. Background technique [0002] The development of social economy depends on energy, but with the continuous exploitation of fossil energy, the primary energy is becoming increasingly scarce and the cost of use is getting higher and higher; living environment. In order to reduce dependence on fossil energy and reduce environmental pollution, countries around the world are vigorously developing and utilizing renewable clean energy, especially solar energy and biomass energy. [0003] Both solar energy and biomass energy have the characteristics of wide distribution, inexhaustible supply, low cost, and clean and environmental protection. They are renewable and clean energy with the m...

AI Technical Summary

Problems solved by technology

This method changes the thermal system of the steam turbine and reduces the thermal efficiency of the system; solar heat is used to heat feed water with a very low temperature, and the utilization grade of solar heat is low; the share of solar thermal power generation that can be integrated is also limited, and it is difficult to exceed 10%;

[0009] If solar heat enters the medium and low pressure cylinder of the steam turbine in the form of supplementary steam, technical transformation of the existing steam turbine is required, which increases technical risks and equipment costs; fluctuation or interruption of solar thermal steam affects the power generation and power supply load of the power station, and has a negative impact on the power grid. will also have some impact.

[0010] For example, introducing photothermal steam directly into a coal-fired power plant boiler to desuperheat, this method seems simple and reasonable from the perspective of energy balance, but it is difficult to realize from the perspective of boiler structure, heating surface configuration and heat transfer theory

[0011] To sum up, conventional solar trough thermal power generation systems generally have problems of low technical parameters, complex systems, low power generation efficiency, poor system stability, and high investment costs. These problems are difficult to be effectively solved through simple technical integration. Therefore, it is necessary to seek Technological innovation, breaking the conventional combination method, and developing a new optimized integration mode of solar energy and biomass energy combined power generation system from the perspective of joint and complementary energy sources

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