关键词: 厂际热集成, 中间介质, 连接方式

Abstract: More opportunity to utilize the waste heat in several plants can be brought by indirect interplant heat integration through an intermediate medium. The connection patterns of intermediate medium circles concern the maximum heat recovery potential and investment costs. The three basic connection patterns of intermediate medium circles are serial,split,and parallel,respectively. Based on these patterns,a serial-parallel combined connection pattern was presented in this paper. Furthermore,the interplant shifted composite curves and intermediate medium curves of this pattern were also illustrated. Results of a case study showed that,the serial-parallel combined connection pattern can recover more heat than the serial and spilt patterns. Its maximum heat recovery potential even approaches to that of the parallel pattern,which can always recover the most heat among the three basic connection patterns. The pipe costs of intermediate medium circles vary with the distances between plants. A proper connection pattern should be selected according to the characteristics of distances between plants.

Key words: interplant heat integration, intermediate medium, connection pattern