Study On The Operating Costs Control Method Of Industrial Pulverized Coal Boilers On The Basis Of Carbon Trading Mechanism

Coal-dominated energy consumer products will be expected to last through the foreseeable future resulting from the energy resources structure of "abundant with coal,rare oil and gas" in China.The pulverized coal industrial boiler system,with pulverized coal combustion as the core,consists of coal powder preparation and transportation,low-emission flue gas purification and other technologies.How to effectively control the operating costs on the basis of the existing technologies,however,has become a major issue that has to be addressed.The relevant studied will be performed based on carbon trading mechanism,and the several factors should be taken into consideration,i.e.coal powder distribution,preparation and emission reduction,pollutant discharge and right to access.Firstly,for the cost control of the pulverized coal distribution and carbon emission reduction,the following aspects will be investigated,including the carbon emission reduction in the process of preparation,production and combustion of pulverized coal,order,the distribution route as well as the site selection of pulverized coal plants.Secondly,the effects of the different mechanisms on the electricity costs control of pulverized coal industrial boilers under the circumstance of right to access.Finally,a set of scientific decision-making mechanisms for operational cost control issues will be established via joint optimization of distribution,emission reduction and electricity costs.This is believed to exhibit great practical value.The main content and the results of the present dissertation are arranged as follows:1.Costs control of coal powder distribution and carbon emission reduction based on carbon trading mechanism.The logistics network,composed of single coal mine,several pulverized coal plants,heat source plants and customers,has been considered as the influencing factor on the costs control.Carbon emission reduction control model has been established for the heat source plants,and the ordering quantities of coal powder and carbon emission reduction has been solved.Simultaneously,Lagrange relaxation method is adopted to solve the model aiming to determine the location of coal powder facility and the carbon emission reduction optimizing.The research results show that the increase of carbon trading price will lead to the decrease of heat source plant profit and the increase of coal mill cost.At the same time,excessive carbon trading price will greatly damage corporate profits and will not significantly reduce the total carbon emissions of logistics network.The cost control model of the whole process for pulverized coal preparation,distribution,combustion and emission reduction is solved and the model is verified by the actual data of pulverized coal industrial boiler.This will offer more practical meaning.2.Costs control of nitrogen oxide emission reduction in pulverized coal industrial boilers under the nitrogen trading mechanism.Carbon cap and trade model is expanded to nitrogen oxide emission reduction under nitrogen trading mechanism.Relationship between costs and technologies of nitrogen oxide emission reduction has been analyzed and costs function of nitrogen oxide emission reduction is fitted.Costs control model has been established under the pollution emission tax.And the optimal control scheme of nitrogen oxide is proposed under carbon cap and trade and pollution emission tax,respectively.The results show that under the nitrogen limit mechanism,the LNT technology is more economical when the quota is higher(400mg/m3),and the LNT technology coupled with SCR de-nitration technology scheme is more economical when the quota is lower.Under the pollutant emission tax mechanism,when the pollutant tax rate is high,it is suitable to adopt the low-nitrogen combustion technology coupled with the SCR de-nitration technology.When the pollutant tax rate is low,the optimal emission of nitrogen oxides will be improved.The abatement cost function of various nitrogen emission reduction technologies is fitted.In addition,the nitrogen emission reduction cost control model of the coal powder industrial boiler is constructed and solved under the nitrogen limit and pollutant emission tax mechanism.It will provide a basis for decision making for the choice of oxide emission reduction and emission reduction technologies,which is achieved via the actual operation data of pulverized coal industrial boiler.3.Electric power cost control of pulverized coal industrial boilers based on electricity utilization mechanism.The relationship between the electricity used for preparation and the combustion and the combustion efficiency of pulverized coal is established.The electric power cost control models have been established under three mechanisms of electricity utilization mechanism,electricity consumption limit and electricity consumption tax,respectively.And the optimal costs controls have been investigated under three mechanisms.The effects of raw coal purchase price,electricity price unit price and electricity use transaction cost on the optimization strategy of coal powder preparation and pulverized coal combustion are analyzed with the example.The results show that the higher the purchase price of raw coal is,the more cost savings brought by the optimization of the preparation and combustion is.While,the lower the transaction cost of electricity price and electricity use is.the more cost savings is.Combined with the actual operational data of the pulverized coal industrial boiler,the data on the power consumption during the preparation and combustion of the pulverized coal is analyzed to determine the relationship between the raw coal production and electricity used for preparation and combustion.The related cost function model is established,and the power cost control model is constructed under the right to access and transaction mechanism.This will provide a basis for the optimization decision of the electricity cost of the pulverized coal industry boiler.4.Joint costs control of coal powder distribution,nitrogen oxide emission reduction and electricity power of pulverized coal industrial boilers.The three aspects,coal powder distribution,nitrogen oxide emission reduction and electricity power costs,have been considered on the basis of actual operation data from the Shendong coal group.Later,the comprehensive costs are investigated.The optimal pulverized coal plant site selection decision,raw coal and pulverized coal distribution route,carbon reduction decision in the milling and combustion process,electricity decision-making in the milling and combustion process is solved.The case study of Shendong Coal Group shows that the optimal distribution route of pulverized coal is different when there is a significant peak and low valley demand for pulverized coal.The higher the out-of-stock cost of pulverized coal is,the larger the order quantity of pulverized coal;The carbon emissions in the process of pulverized coal combustion are the key to the optimization of carbon abatement costs under the carbon trading mechanism.The excessive electricity tax is not conducive to making optimal decisions to significantly reduce carbon emission reduction.The relevant theories of carbon allowance,carbon tax and carbon trading are extended to the aspects of nitrogen oxide emission reduction and energy cost control.More importantly,nitrogen limit,nitrogen tax and electricity limit,electricity tax,and electricity transaction cost control model is stablished to provide guidance for decision-making on energy conservation and emission reduction.