Study On The Methods For Potential Energy Saving And Emission Reduction In Cigarette Manufactures And Their Applications

Energy is an important resource of industrial production and human life.As a large amount of greenhouse gas emissions come from fossil fuel combustion,which makes the global climate changes,energy and environmental issues become a major concern in the world.The industrial sector accounts for 69% of the total energy consumption in China,and81% of the total greenhouse gas emissions of the country,which is the focus of energy saving and emission reduction.The efficiency of energy utilization in China's cigarette manufactures has been continuously improved since the new century,and the total amount of production emissions is decreasing,but the differences of energy intensity among manufactures are still significant.Nowadays,China's economic development has entered a new normal situation.Cigarette manufactures are facing severe challenges,such as the decline in scale efficiency,the overcapacity of equipment,the reduction of optimization space and the impacts of intelligent manufacturing,and will face greater pressure to fulfill the ‘13th Five-Year' energy saving and emission reduction targets.This paper takes the cigarette manufactures as the main research object,and carries out the study on the methods for estimating the energy and environmental efficiency and the potential of energy saving and emission reduction in tobacco primary processing line as well as the industrial building,and the Fuzzy-AHP method for evaluating the energy saving and emission reduction strategies and their applications.The main innovative works are shown as below:(1)An international comparative study of total factor energy and environmental efficiency is carried out from the enterprise level,and the RAM-DEA model is applied to evaluate the energy and environmental efficiency of the cigarette manufactures.The results show that the gap of the comprehensive efficiency between Chinese cigarette manufactures and the technological frontier of the world is big,but it is gradually shrinking.The pure technology potential of energy saving and emission reduction will be greatly reduced in the future but the scale potential still has greater space to be achieved.The efficiency and the technological frontiers' disparity between the domestic cigarette manufactures and foreign enterprises is large but is decreasing greatly.(2)An integrated model is proposed,employing the e-p method which is widely used in the energy consumption analysis of the process industry,to estimate the energy saving and emissions reduction potential of the tobacco primary process.Based on the energy consumption data of the three Chinese cigarette enterprises in 2015,the results show that as to the section energy intensity factor of the tobacco primary process,the changes of the tobacco leaf pre-conditioning section and the cut lamina drying section can contribute18%-47% and 9%-36% reduction of the unit cut tobacco energy intensity,and as to the production ratio factor,the lower proportion of cut stem can lead to 15%-33% reduction of the unit cut tobacco energy intensity because of the higher energy intensity of the stem process section.In addition,scenario analysis has been used to estimate the energy saving and emissions reduction potential by process optimization and products structure upgrade under the premise of the fixed total production volume,the actual production portfolio and process equipment of three enterprises.Finally,the effective measures and policy suggestions are provided to realize the goal of energy saving and emissions reduction for three cigarette enterprises.(3)A typical geometric building model of cigarette manufacture is established employing the dynamic energy consumption simulation method,which is based on DOE-2model,the energy saving and emission reduction potential of the typical building model and the technical measures of green industrial building of tobacco industry under different climate conditions are comprehensively evaluated,and the measured data of 11 green industrial building projects are collected to verify the simulated data.The results show that the energy consumption proportion of Ventilating and Air Conditioning system and the cooling system are the highest in the building energy consumption of cigarette manufacture.The energy saving potential of the typical building model in the hot summer and warm winter area and the severe cold A area is the highest,while the emission reduction potential is quite different with the energy saving potential in different climate zones.The potential of emission reduction in the severe cold A and B areas is lower than that of energy saving,and the results of the remaining regions are opposite.The energy saving rates of the lighting density reduction and the air volume control in air conditioning area are the highest in all climate zones.(4)A comprehensive evaluation index system and a fuzzy-AHP comprehensive evaluation model of energy saving and emission reduction strategy are constructed.In a typical cigarette manufacture,12 energy-saving and emission reduction strategies are selected from the technological energy saving and building energy conservation aspects,and based on the calculation of energy saving and emission reduction potential utilizing the e-p method and the e Quest software,the comprehensive evaluation is carried out.The results show that the technical performance and the environmental impact index are the main focus of the evaluation index system.The optimization of Ventilating and Air Conditioning system is the best in the comprehensive evaluation results,followed by the optimization of tobacco leaf process and the optimization of lighting system.The optimization of 4 main energy-using systems of the industrial building is still the focus in the future,the energy saving strategy of the tobacco primary process is suitable for the popularization and application,and the energy saving measures of management are worthy of the enterprises' actual application.The research results will provide a scientific basis for the evaluation and selection of energy saving and emission reduction strategies for industrial enterprises.