A zero-carbon emission cogeneration device and working method based on full thermal cycle

Abstract

The invention discloses a zero-carbon emission cogeneration device and working method based on a full thermal cycle. The device includes a Brayton cycle system, a heat pump system, a waste heat recovery system and a carbon capture system. LNG cold energy first enters the Brayton cycle system to generate electricity, then enters the turbine to generate electricity using the direct expansion method, and finally enters the carbon capture system to liquefy carbon dioxide, realizing the cascade utilization of LNG cold energy. The vaporized natural gas is fed into the gas turbine for combustion and drives the generator and heat pump to work. The waste heat generated by the gas turbine is recovered and used for heating, power generation or domestic hot water production. After the exhaust flue gas is separated, the cold energy of LNG is used to liquefy carbon dioxide to realize low-cost carbon capture. The invention couples LNG vaporization, carbon capture, waste heat recovery and heat pump technology, and realizes zero carbon emission and combined cooling, heating and power generation.

Description

technical field [0001] The invention relates to a zero-carbon emission cogeneration device and working method based on a full thermal cycle. Through the organic cooperation of a Brayton cycle system, a waste heat recovery system, a heat pump system and a carbon capture system, the cogeneration of cooling, heating and power is realized. At the same time, it also meets the requirements of zero carbon emissions. It belongs to the field of energy utilization. Background technique [0002] In recent years, with the rapid development of the natural gas industry, the efficient utilization of natural gas has become a research hotspot. my country's energy policy and the proportion of primary energy determine that the use of natural gas will be an advantageous industry that will be vigorously developed in the next few years. For this system, firstly, the cold energy of LNG should be divided into cascades for rational use, and secondly, how to improve the system's waste heat recovery ...

AI Technical Summary

Problems solved by technology

Although the system recycles waste heat, the Rankine cycle power generation efficiency is low and the flue gas after heat release is directly discharged into the atmosphere, causing pollution, and it does not consider how to use the large amount of cold energy generated by LNG liquefaction

Images