The Research On Optimization And Energy Saving Of Titanium Dioxide Production Energy System Based On Combined Cooling,Heating And Power System

With the rapid development of China’s economy,the demand for titanium dioxide is also increasing.Titanium dioxide production is a high energy-consuming and highly polluting industry.In recent years,the state has stricter requirements on energy conservation and emission reduction of enterprises.Many titanium dioxide enterprises have shut down and rectified.Therefore,it is the research focus of the titanium dioxide industry to adjust the mode of production energy use,improve energy efficiency,and reduce energy consumption in various production links.This article starts with the energy consumption of titanium dioxide production,and calculates the energy consumption of each process of titanium dioxide production,and obtains the heat load,cooling load,and electricity consumption of each process.The energy consumption of each process is analyzed to estimate the energy utilization rate.,Energy saving potential.Introduce the cold,heat and electricity co-generation system to provide three kinds of energy for the production of titanium dioxide:cold,heat and electricity.Then introduce the equipment and general process of the combined heat and cold power system,and propose three energy supply modes,which are Option 1 internal combustion engine-waste heat Boiler-heat exchanger/steam lithium bromide absorption refrigerating "to set the electricity" scheme;Option 2 Internal combustion engine-waste heat boiler-heat exchanger/steam lithium bromide absorption refrigerating "to set the electricity" plan;option 3 boiler-electric refrigerator—General scheme of grid power supply.Calculate and compare the energy consumption,cost,and emissions of the three schemes,and then model the three energy supply modes.Establish two kinds of optimization schemes.The first is the optimization scheme of internal combustion engine fuel flow rate and internal combustion engine waste heat distribution rate,and the second is the optimization scheme of changes in energy prices and electricity prices and natural gas prices.The conclusion is that when the thermal load rate is higher than 1.9 for the "cold fixed power" co-production scheme in the production of tons of titanium dioxide,the internal combustion engine is the most economical,and for the "heat fixed power"co-generation scheme when the thermal load rate is higher than 2.3 The internal combustion engine has the best economic operation.The cooling load rate of 0.9 in the "cold fixed power" joint supply mode is the cut-off point for the optimal distribution rate of the internal combustion engine residual heat;the cooling load rate in the "cold fixed power" joint supply mode is the cut-off point of the optimal distribution rate of the internal combustion engine residual heat.point.When the electricity price is less than 0.9 yuan/kW·h,the annualized cost of the "cold electricity" joint supply method is lower.When the electricity price is 0.9 yuan/kW·h,the annualized cost of the two joint supply schemes is equivalent.When the electricity price is higher than 0.9/kW·h The annualized cost of the combined heat and electricity supply is lower.