化工生产中消耗的大量能源 ,多以热水、热气等形式排放掉。因此 ,尽可能多地回收这些余热是节能研究中的重要课题。但是 ,余热的供应往往是不稳定的和不可靠的。为了使连续性很强的大生产稳定地运行 ,在利用余热的生产流程中 ,一般都要考虑热源或物料的后备支持手段。这就出现 A large amount of energy consumed in chemical production is mostly discharged in the form of hot water, hot gas and the like. Therefore, as much as possible to recover these waste heat is an important issue in energy saving research. However, the supply of waste heat is often unstable and unreliable. In order to make the continuous production of large-scale stable operation, the use of waste heat in the production process, generally have to consider the heat source or material backup support. This appears