Simulation Research On Gas Heat Transfer Law In Honeycomb Ceramic Regenerator And Heating Furnace

Regenerative combustion technology is known as"one of the key technologies in the21st century",compared with other combustion technologies,it has the advantages of high heat recovery rate and lower hazardous gas emissions,it has been promoted and favored by many countries.The regenerator and the furnace are the two core equipment of the whole system,the pros and cons of performance affect the operation of the entire system,whether the regenerator can evenly and efficiently store heat and release heat,and whether the furnace can be evenly burned directly affects the working efficiency of the entire system.This article starts from the goal of improving the uniformity of heat storage in the regenerator,improving the uniformity of combustion in the furnace,and increasing the temperature of the flue gas at the outlet of the furnace,use FLUENT software to simulate the heat transfer process in the regenerator,the combustion process in the furnace,and the factors that affect the heat transfer effect of the regenerator.The main numerical simulations and researches content of the article are:（1）Use FLUENT software to numerically simulate the heat transfer process of the regenerator and the regenerator,obtain the temperature distribution and change law in the regenerator;（2）Numerical simulations of the heat storage process in the regenerator under different working conditions are carried out,and the effects of different regenerator materials,different initial gas speeds,different reversing times and different regenerator lengths on the heat storage effect of the regenerator are obtained;（3）Under the premise of the same cross-sectional area,numerical simulation of the influence of different lengths and different hole types on pressure loss,The results are:1)The gas pressure loss in the heat storage body increases with the increase of the heat storage body,and when the gas flow rate is the same,the gas pressure loss per unit height of the regenerator decreases with the increase of the length of the regenerator;2)The hole type of the regenerator will affect the pressure loss of the gas,when the gas flow rate is the same,the pressure loss from the largest to the smallest heat storage body is:regular triangle hole heat storage body,square hole heat storage body,regular hexagon hole heat storage body;（4）Using the method of combining orthogonal experiment and numerical simulation,explore the influence of different factors on furnace combustion uniformity and furnace outlet flue gas temperature,The results are:The factors that affect the two effects in descending order are as follows:gas speed,preheating air speed,inlet distance between preheated air and gas,inlet angle of preheated air and gas.Through calculation and comparison,the optimal parameter combination is obtained as:gas speed 5m/s,preheating air speed 5m/s,the distance between preheated air and gas inlet is 360mm,preheated air and gas inlet angle 30°.When the gas inlet velocity is 5m/s,the preheated air velocity is 10m/s,the gas inlet distance is 120mm,and the inlet angle is 20°,the volume fraction of CO₂ in the furnace is the smallest,and the combustion of the furnace produces the least CO₂.When the gas inlet speed is 5m/s,the preheated air speed is 5m/s,the gas inlet distance is 360mm,and the inlet angle is 30°,the volume fraction of CO in the furnace is the smallest,and the fuel combustion in the furnace is the most complete.The relevant conclusions drawn through numerical simulation have reference value for studying the heat storage process of the regenerator,the combustion process of the furnace,and the factors that affect the heat storage efficiency of the regenerator.