Distributed energy power generation system and method for multi-level waste heat utilization

Abstract

The invention relates to a distributed energy power generation system and method for multi-level waste heat utilization. A distributed energy system is high in fuel gas price, and a waste heat utilization system is low in efficiency. The distributed energy power generation system comprises a fuel gas internal combustion engine generator set, a waste heat boiler and a steam type lithium bromide unit, and is characterized by further comprising a multi-level organic Rankine cycle system, and the multi-level organic Rankine cycle system comprises a first heat regenerator, a first evaporator, a second heat regenerator, a preheater, a third expansion machine, a third condenser and a steam hot water type heat exchanger; a first working medium pump, the first heat regenerator, the first evaporator and the first expansion machine are sequentially connected, and the first expansion machine and the first heat regenerator are connected; a second working medium pump, the second heat regenerator, the preheater, a second evaporator, a second expansion machine and a second condenser are sequentially connected; and a third heat regenerator, a third evaporator, the third expansion machine and the third condenser are sequentially connected. The distributed energy power generation system is reasonable in structural design and high in heat efficiency.

Description

Technical field [0001] The invention relates to a distributed energy power generation system and method for multi-stage utilization of waste heat, and belongs to the technical field of energy utilization. Background technique [0002] Distributed energy is an energy supply method built on the user side. It can operate independently or on the grid. It is a system that determines the mode and capacity to maximize resource and environmental benefits. It is based on the user's multiple energy needs and resource allocation. The new energy system integrates and optimizes the system according to the situation, and adopts demand-responsive design and modular configuration. It is a decentralized energy supply method compared to centralized energy supply. [0003] Distributed energy has the characteristics of high efficiency, energy saving, and environmental protection, which promotes the purpose of low carbon emissions. Distributed energy resources are receiving more and more attent...

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Problems solved by technology

There are also some distributed energy utilization systems of other structures, such as the Chinese patent whose publication date is July 24, 2013, and the publication number is CN203081665U, a distributed multi-stage solar thermal power generation system disclosed, and the publication date is On January 16, 2013, in the Chinese patent with the publication number CN102878035A, a multi-level solar energy and other energy complementary thermal power generation and polygeneration system were disclosed. The thermal efficiency of these distributed energy utilization systems is not high

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