| 摘要 |
The present application relates to a heat recovery apparatus and a method thereof, according to the heat recovery apparatus and a method thereof according to an embodiment of the present application, steam of 120° C. or more may be generated using only one heat exchanger using waste heat of a low-grade heat source in the state of a sensible heat of 70° C. or more discharged in industrial sites or various chemical processes, for example, such as a manufacturing process of petrochemicals, and the generated steam may also be used in various processes, and thus the use of high temperature steam which is an external heat source to be used in a reactor or a distillation column may be decreased, thereby maximizing energy saving efficiency. |
| 主权项 |
1. A heat recovery apparatus, comprising:
a first heat exchanger, a compressor, a second heat exchanger, and a pressure drop device which are fluidically connected through a pipe through which a refrigerant flows, wherein a refrigerant flow flowing into the first heat exchanger is heat-exchanged with a fluid flow of 70° C. or more flowing into the first heat exchanger, the refrigerant flow flowing out of the first heat exchanger flows into the compressor, the refrigerant flow flowing out of the compressor flows into the second heat exchanger, and is heat-exchanged with a fluid flow flowing into the second heat exchanger, the refrigerant flow flowing out of the second heat exchanger flows into the pressure drop device, the refrigerant flow flowing out of the pressure drop device reflows into the first heat exchanger, and a ratio between a pressure of the refrigerant flow flowing out of the first heat exchanger and a pressure of the refrigerant flow flowing out of the compressor satisfies the following Expression 1:
2≦PC/PH≦5 [Expression 1] where, in Expression 1, PC denotes a pressure of the refrigerant flow flowing out of the compressor, and PH denotes a pressure of the refrigerant flow flowing out of the first heat exchanger. |
