Study On Optimization And Energy Saving Of Energy Consumption System In Plywood Production

Since the beginning of the 21st century,China's plywood industry has developed rapidly,and its annual output has ranked first in the world.However,due to the limitations of production equipment and technology,the comprehensive energy consumption of China's plywood unit products is high,and developed countries.There is still a big gap compared to this.This paper takes the production line of a plywood enterprise in Shaoguan as the research object,and uses the combination of theoretical analysis,field measurement and numerical simulation to study and analyze the production energy.The main research contents and conclusions are as follows:(1)The fuel consumption statistics of a plywood production line in Shaoguan and the energy consumption monitoring of each process are comprehensively analyzed and calculated.The basic energy consumption per unit product of the plywood enterprise is 164.2kgce/m3 and the basic energy consumption grading index value of the national standard plywood unit output is compared.The basic energy consumption of the plywood unit products produced by the company has only reached the qualified level.(2)According to the energy consumption of the plywood production line,the overall optimization and energy-saving benefit analysis of the plywood production energy system was carried out,and three energy-saving and consumption-reducing technologies were proposed:using the flue gas waste heat recovery technology to transform the boiler flue gas treatment facility to ensure the smoke The gas treatment facility does not cause low-temperature corrosion,and the boiler exhaust gas temperature is reduced by about 70?.This alone can save about 265.8 tons of standard coal per year.The energy cascade utilization and condensate condensation heat recovery technology are used to optimize the energy system of the plywood.Reconstruction can save about 1836.8 tons of standard coal per year;use low-grade waste heat recovery technology to transform heat-conducting oil boilers and waste heat boiler systems,and the annual recoverable heat is equivalent to 1959 tons of standard coal.(3)Establish a dry room model of typical equipment for energy consumption of plywood,and carry out CFD simulation calculation to obtain detailed information of internal airflow cycle analysis of plywood drying room.The internal velocity field of the plywood drying room under six different working conditions was simulated.The results show that when the distance from the slab to the side wall is constant,the distribution of the velocity values of the measuring points is the highest when the flue gas velocity at the entrance of the plywood drying room is 4m/s.Uniform,and the mean square error and coefficient of variation of each measuring point are the smallest,and the circulation of the airflow is more uniform;when the inlet flue gas is constant,the distance from the slab to the side wall has a greater influence on the circulation distribution of the airflow in the dry room,and is appropriately increased.The distance from the large slab to the side wall can improve the uniformity of air distribution in the dry room,but when the distance from the slab to the side wall is too large,it will affect the dry quality of the slabs on both sides of the dry room.It is the best working condition to choose the flue gas inlet speed of 4m/s and the slab to the side wall distance of 0.2m,which has certain theoretical value for improving the slab drying quality,shortening the drying time and saving energy.