低位烟气余热深度回收利用状况述评_新技术路线与回收条件改变的影响

提高能源的利用率来实现节能减排,是解决当前能源与环境问题的重要途径之一。通过对国内、外各行业窑炉与热能动力设备排烟温度的列举与分析,指出这类排烟的余温仍较高,提出在烟气余热回收热量传递过程中采取"质""量"分控的回收方式,利用烟气余热的"驱动力",即可实现烟气余热的深度利用,并对深度利用后烟气特性变化而引起的回收条件改变的影响进行了分析。

Review of the Application Status of Low Quality Flue Gas Waste Heat Utilization Technologies-Remaining Temperature Conditions and Heat Recovery Difficulties

To enhance the utilization rate of energy sources for realizing energy conservation and emission reduction is one of important approaches for solving the current problems relating to energy sources and environment.Through an enumeration and analysis of the temperatures of flue gases outgoing from kilns and thermal energy and power equipment items in various sectors in both domestic and abroad,it has been pointed out that the temperatures of the kind are still relatively high and a separate control in quality and quantity is proposed to be adopted for the mode of heat recovery during the heat transfer process of the flue gases in the waste heat recovery with an in-depth utilization of the waste heat in the flue gases being realized by utilizing the "driving power" of the waste heat in the flue gases.In addition,an analysis of the influence of the change of the conditions for recovering the heat caused by a change in flue gas characteristics after the in-depth waste heat utilization was also performed.