Low-quality waste heat recycling system

Abstract

The invention discloses a low-quality waste heat recycling system. The system comprises a waste heat recovery system and a circulating system; the waste heat recovery system involves a waste heat airinlet pipeline, a heat pipe steam generator and a waste heat air outlet pipeline; and the circulating system involves an air storage tank sensor set, an air storage tank, an air inlet sensor set, a Laval nozzle, a Roots power machine, an air outlet sensor set, a condenser liquid level meter, a condenser, a condensation supplementing pump, a liquid supplementing box and a liquid feeding pump. According to the system, low-quality waste heat gas serves as a heat source, the waste heat recovery system enables a liquid working medium to absorb heat in the waste heat gas and to be converted into gas, working medium steam enters the Roots power machine to push the Roots power machine to act, heat energy is converted into mechanical energy, and then the working medium steam is condensed into liquid through the condenser and continues to be recycled. The system achieves efficient recycling and reusing of low-quality waste heat, and is simple in structure, high in energy utilization rate and high in 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 ...

AI Technical Summary

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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