Multistage utilization organic Rankine cycle system for waste water heat energy of bathroom

Abstract

The invention provides a multistage utilization organic Rankine cycle system for waste water heat energy of a bathroom. The multistage utilization organic Rankine cycle system comprises a first evaporator (1), a second evaporator (2), an expansion machine (3), a condenser (6), a pump body (5), a third evaporator (7) connected with the second evaporator (2), and a steam generator (4) connected with the expansion machine (3), wherein the first evaporator (1), the second evaporator (2), the expansion machine (3), the condenser (6), the pump body (5), the third evaporator (7) and the steam generator (4) are sequentially connected. The system is applied to recycling treatment of hot waste water in public bath houses, and energy conservation and consumption reduction optimization and gradient utilization of residual energy are achieved. The multistage utilization organic Rankine cycle system has the following main beneficial effects that the temperature of waste water can be reduced, the temperature requirement for waste water discharging is reached, and damage of high temperature to a pipeline is relieved; heat energy can be utilized in multiple ways, part of the heat energy is used for directly heating cold water, serves as a status heat source for a heating system in winter and is used for preheating in summer; surplus energy is utilized, is directly converted into electric energy and can be used for illumination for the bathroom, and use of extra electric quantity is reduced; and low-grade heat energy can be sufficiently utilized and recycled.

Description

technical field [0001] The invention relates to the field of sewage treatment and its recycling, in particular to an organic Rankine cycle system for multi-stage utilization of waste water heat energy in bathrooms. Background technique [0002] With the development of human civilization, energy issues have gradually become a concern. The problem of resource depletion and environmental degradation has become increasingly prominent. Establishing a sustainable socio-economic development model and a stable natural environment system has become the only way for human development; main direction of research. At present, there are a large number of waste heat resources that have not been rationally utilized in the world. Taking the school bathroom as an example, the temperature of the outlet water is 40 degrees Celsius, while the average temperature of the waste water is 36 degrees Celsius. It can be seen that the utilization rate of heat is only 16.7%, and the rest of the heat i...

AI Technical Summary

Problems solved by technology

With the continuous improvement of people's quality of life, domestic hot water consumes more and more energy, but the conventional bathing system does not treat the bathing wastewater, so that the heat contained in the sewage is wasted, which is higher than the ambient temperature. This loss is even more serious in large centralized bathing systems

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