Modeling of effective heat and thermal efficiency of cement clinker production system and its subunit
作者单位：College of Materials Science and Engineering Xi'an University of Architecture and Technology Department of Civil Engineering University of Agder
会议名称：《2019年中国过程系统工程年会(PSE2019)》
会议日期：2019年
学科分类：080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理]
关 键 词：Thermal Efficiency Effective heat whole system subunit
摘 要：Various thermal devices along a modern cement production line are often grouped into five subunits according to the functionality of each device and energy/mass flow in between. Study is carried out in the present paper by a heat balance approach to address the energy input, effective heat and heat outflow as occurred in its five subunits. Energy efficiency of each subunit, and its contribution to the energy efficiency of whole system are then discussed. It is found that thermal efficiency of the whole system(φ) is in a linear correlation with thermal efficiency of its subunits. Thermal efficiency of Decomposition & Clinker Calcination subunit(D&C unit) φ has greater impact than other subunits on the whole system φ: an increase of 1% in φ leads to an increase for the whole system φ by 1.76%. To improve the thermal efficiency of the whole system, measures should be focused on raising thermal efficiency of D&C subunit φ by for example increasing the decomposition rate of raw feed into rotary kiln, adopting lower calcination temperature in calciner.