A distributed energy generation system and method for multi-stage utilization of waste heat

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 generation system and method for multi-stage utilization of waste heat, belonging 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 in parallel with the grid. It is a system that determines the mode and capacity by maximizing resources and environmental benefits. According to various energy needs of users and resource allocation System integration and optimization according to the situation, the new energy system adopting demand-responsive design and modular configuration is a decentralized energy supply method relative 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 has received more and more attention. There ar...

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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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