This paper takes the exergy methods of analysis, make the cement kiln in the low-temperature waste heat power generation as the studying object, and the exergy recycle rate as the system thermal economic evaluation standard, and take the part of thermal parameters of the flash waste heat power system as the key. Analyze the flash series in qualitative ways, and get the result that the more the flash series, the big the exergy recycle rate, building a general matrix model about flash pressure parameter distribution, chose proper optimization methods and get the result of the best value. Discuss the exports economizer diversion point parameters, the results showed that with the diversion point of the flow and temperature increases, the system exergy recovery rate increases gradually, and with the extreme point discussion. The selection of the pinch point needs to consider both the exergy recovery rate and the total area size of the heat exchange. The conclusion provides theory of reference and guide. |