Optimization Design Of Flame-blown Glass Fiber Felt Production Line And Research On Product Performanc

As inorganic nonmetallic fiber material,glass fiber has good chemical resistance and durability,and has good application in composite reinforcement,heat preservation and sound absorption,filtration and other fields.Flame blowing is a kind of glass fiber production process,through high speed and high temperature air jet draft of glass fiber,can produce fiber diameter of glass fiber up to micro and nano.At present,domestic flame blowing production equipment is simple,low degree of automation,high energy consumption.For the purpose of environmental protection and reduce the cost,a lot of glass fiber production enterprise began to look for alternative sources of energy to replace natural gas as the flame blowing production of gas source,among them,the coking gas is a kind of excellent gas,but through the actual production,found that after using coking gas instead of natural gas,production of glass fiber felt appeared such as uneven distribution of weight,uneven surface of the product,product strength decline and other problems,even can not be smoothly produced.Production experiment and theoretical calculation proves the flame gas properties in flame blowing production line within the production line on the influence of air velocity and temperature,coking gas combustion value is low,produce big flue gas mass flow rate,high flue gas internal energy,combustion of coking gas crater high speed jet temperature and airflow in the production line is the root cause of the high temperature and high speed.The increase of air velocity and temperature in the production line will cause problems such as uneven distribution of glass fiber gram,netting on the surface of the product,and decrease of strength of the product.The purpose of this thesis is to optimize the design of coking gas flame blown glass fiber cotton felt production line.Numerical simulation and experimental verification are carried out on the movement of airflow and fiber particles in the flame blowing production line.using the theory of fiber of slender,discrete phase in the simulation model of the fibers was optimized trajectory calculation,The flow and particle motion in the production line are simulated,including the flow velocity and temperature distribution,particle trajectory and particle mass concentration distribution.In the numerical model,a single factor experiment was carried out on the production line to explore the influence of each factor on the flow and particle movement,and the constraint relationship between the nozzle jet movement and the production line and the design criteria were established.The optimized production line was designed for construction and production verification.The results showed that the standard deviation of gram weight of glass fiber felts by the optimized flame blowing production line decreased from 10.68 to 0.94,and the standard deviation of light intensity of glass fiber felt decreased from 32.97 to 25.75.The standard deviation of adhesive content distribution decreased from 6.06 to 0.60,and the strength of glass fiber felt increased from 6 N to 11 N,which solved the production problem of flame spraying production line.Finally,the performance of the glass fiber felt produced by flame blowing production was explored,and its application in air filtration was emphatically studied.The influence of fiber stacking structure on dust capacity and fiber diameter distribution on filtration performance were analyzed.Finally,through the comprehensive energy efficiency ratio parameters,comprehensive analysis and evaluation of air filter performance in the HVAC system.