Research on Energy-Saving Technology of High Efficient Recycling and Ladder-Form Utilization of Mid- and Low-Temperature Waste Heat in Large Hospital

Large hospitals need a large amount of steam every day as a heat source for high-temperature disinfection or heat exchange with domestic water. However, after steam is used once, it is rarely reused. Although there are some open or semi-open condensate water recovery systems, system defects lead to a large amount of steam condensate contaminated and disposed of as waste water, which eventually results in enormous waste of water resources and the heat in steam and condensate water. Therefore, there is great potential for cost savings and technological renovation in this area. In order to improve energy efficiency, recycle wasted heat and high-quality softened water resources, and achieve the re-utilization of condensate water in the system, the project designed an efficient steam cascade utilization system, which allows for the multi-stage utilization of medium and low temperature steam under different heat loads, achieving a seamless all-weather connection between the heating system and the heat utilization system in terms of supply and demand, start and stop, so that high quality softened water resources can be reused and heat can be recovered. All of these efforts are essential for energy conservation, environmental protection, and the implementation of circular economy and sustainable development.