Study On The Thermal Characteristics And Coke Oven Time Of The Baosteel 7m Coke Oven

Coking industry was an important part in the chain of iron and steel industry.After the development of 100 years, Modern coking industry was undertaking the problems of coking coal resources of high quality and environmental protection laws.In order to promote the development of large coke oven, Baosteel 7 m coke oven was a typical sample, However, based on the original 6 m coke oven to enlarge or improve,production practice showed that there were differences in system resistance, thermal system management, energy consumption and more aspects. This paper was based on theoretical calculation and comparison of actual production data with measured thermal parameters, focusing on following problems: the characteristics of 7 m coke oven in thermal engineering, the fluidity mechanical characteristics of oven, the horizontal temperature of coke oven and soaking time under the theoretical basis.The results showed:(1) The 7 m coke oven was similar to traditional coke oven in the law of material and energy transition, the efficiency of heat was 83.68%, and thermal efficiency was up to 71.68%. Due to the high excess coefficient of air, the heat consumption of 7 m coke oven in coking was higher than 6 m coke oven.(2) There were differences between 6 m coke oven and 7 m coke oven by measuring the parameters of combustion system, such as resistance, buoyancy, and suction. The system resistance was increased by 1.51 ~ 4.99 Pa, the distribution of static pressure of horizontal flue was different with traditional coke oven, and the static pressure inside and outside were not gradually increased. In the actual operation,the relationship between distribution of pore and theoretical static pressure, the change of resistance by the flow velocity and the influence of the pore distribution on the flow field were considered.(3) In actual production, the transverse coefficient of 7 m coke oven was low,and the oven was mainly divided into four types: the type of high turbine side temperature, the type of high coke side temperature, type M and irregular type.According to the four different types, we took corresponding measures, suck as the type of high turbine side temperature or the type of high coke side temperature, by adjusting the size of the orifice plate, the temperature of the flue can decrease or increase. and studied the transverse coefficient was about increased by 0.2, that means the adjusting measure is correct.(4) In order to determine soaking time, this paper studied production data andrising pipe temperature, then established the model of coking index. In the actual production, the coking index was determined according to the curve of rising tube temperature and the rate of operation, therefore, the soaking time was determined based on the former coking index.