A low-quality waste heat recovery and utilization system

Abstract

The invention discloses a low-quality waste heat recovery and utilization system, which includes a waste heat recovery system and a circulation system; the waste heat recovery system includes a waste heat inlet pipeline, a heat pipe steam generator and a waste heat outlet pipeline; the circulation system includes a gas storage tank sensor group, a storage tank Air tank, air inlet sensor group, Laval nozzle, Roots power machine, air outlet sensor group, condenser liquid level gauge, condenser, condensate make-up pump, make-up liquid tank and feed liquid pump. This system uses low-quality waste heat gas as the heat source. The waste heat recovery system makes the liquid working fluid absorb the heat in the waste heat gas and convert it into a gaseous state. The vapor is condensed into a liquid state through the condenser, and continues to be recycled. This system realizes the high-efficiency recovery and reuse of low-quality waste heat, with simple structure, high energy utilization rate and high heat conversion efficiency.

Description

technical field [0001] The invention relates to the field of industrial waste heat utilization, in particular to a low-quality waste heat recovery and utilization system. Background technique [0002] With the development of industrial technology and economy, the consumption of non-renewable resources has intensified, and energy problems have become more and more prominent. More and more attention has been paid to energy recycling technology, and low-grade energy recovery and reuse technology can greatly reduce the consumption of high-grade energy and reduce energy costs. There are many types of low-grade thermal energy, the common ones are solar thermal energy, geothermal energy, industrial waste heat and ocean temperature difference energy. Low-grade heat sources generally have a temperature lower than 200°C, such as industrial waste heat. In the current industrial production process, there are a lot of industrial waste heat energy, and a large amount of industrial waste ...

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Problems solved by technology

[0003] The document with the application number 201611085197.9 discloses a low-quality waste heat recovery power generation device, which uses a heat pipe steam generator, and the pipes go back and forth more, making it difficult to manufacture, and the pipes are easy to break, and have poor oxidation resistance and high temperature resistance; and the Roots power machine uses single air inlet and single air outlet

A single gas outlet pipeline will cause gas backflow, and the pressure difference in the base circle volume will become smaller, resulting in a smaller gas work, and a smaller force for the gas to push the blades to rotate, resulting in a lower gas utilization rate

The lower utilization rate of gas will cause waste of energy, and the lower utilization rate of energy

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