针对矿渣立磨生产过程中热风炉煤气流量调节的人工依赖性强、磨机出口温度控制精度低以及生产效率低下等问题,该文建立了一个串级控制系统。该控制系统中有两个控制器温度控制器和流量控制器,其中温度控制器的输出值被设定为流量控制器...针对矿渣立磨生产过程中热风炉煤气流量调节的人工依赖性强、磨机出口温度控制精度低以及生产效率低下等问题,该文建立了一个串级控制系统。该控制系统中有两个控制器温度控制器和流量控制器,其中温度控制器的输出值被设定为流量控制器的目标设定值,而流量控制器根据设定值调整煤气流量,从而实现对煤气流量的精确控制。通过该控制系统的建立,出口温度的波动被有效控制在±1℃的范围内,高炉煤气的消耗减少了3 m 3/t,显著提升了矿渣立磨生产的效率和稳定性,有效取代了传统的人工操作方式,对于推动矿渣立磨生产的技术进步和效率提升具有重要意义。展开更多
In Shougang Jingtang 5 500m 3 huge blast furnace ( BF ) design , dome combustion hot blast stove ( DCHBS ) technology is developed.DCHBS process is optimized and integrated , and reasonable hot blast stove ( HBS ) tec...In Shougang Jingtang 5 500m 3 huge blast furnace ( BF ) design , dome combustion hot blast stove ( DCHBS ) technology is developed.DCHBS process is optimized and integrated , and reasonable hot blast stove ( HBS ) technical parameters are determined.Mathematic model is established and adopted by computational fluid dynamics ( CFD ) .The transmission theory is studied for hot blast stove combustion and gas flow , and distribution results of HBS velocity field , CO density field and temperature field are achieved.Physical test model and hot trail unit are established , and the numeral calculation result is verified through test and investigation.3-D simulation design is adopted.HBS process flow and process layout are optimized and designed.Combustion air two-stage high temperature preheating technology is designed and developed.Two sets of small size DCHBSs are adopted to preheat the combustion air to 520-600℃.With the precondition of BF gas combustion , the hot blast stove dome temperature can exceed 1 420 ℃. According to DCHBS technical features , reasonable refractory structure is designed.Effective technical measures are adopted to prevent hot blast stove shell intercrystalline stress corrosion.Hot blast stove hot pipe and lining system are optimized and designed.After blowing in , the blast temperature keeps increasing , and the monthly average blast temperature reaches 1 300℃ when burning single BF gas.展开更多
The computer simulation of the combustion process in blast furnace(BF) stove has been studied by using the k-ε-g turbulent diffusion flame model.The combustion process in blunt annular ceramic burner was calculated b...The computer simulation of the combustion process in blast furnace(BF) stove has been studied by using the k-ε-g turbulent diffusion flame model.The combustion process in blunt annular ceramic burner was calculated by using the software.The profiles of gas and air velocity,temperature of the combustion products,concentration of the components,and the shape and length of the flame during combustion have been researched.Compared with the original annular ceramic burner,the new design of the blunt one improves the mixing of the gas and the air significantly,and shortened the length of the flame.展开更多
文摘针对矿渣立磨生产过程中热风炉煤气流量调节的人工依赖性强、磨机出口温度控制精度低以及生产效率低下等问题,该文建立了一个串级控制系统。该控制系统中有两个控制器温度控制器和流量控制器,其中温度控制器的输出值被设定为流量控制器的目标设定值,而流量控制器根据设定值调整煤气流量,从而实现对煤气流量的精确控制。通过该控制系统的建立,出口温度的波动被有效控制在±1℃的范围内,高炉煤气的消耗减少了3 m 3/t,显著提升了矿渣立磨生产的效率和稳定性,有效取代了传统的人工操作方式,对于推动矿渣立磨生产的技术进步和效率提升具有重要意义。
文摘In Shougang Jingtang 5 500m 3 huge blast furnace ( BF ) design , dome combustion hot blast stove ( DCHBS ) technology is developed.DCHBS process is optimized and integrated , and reasonable hot blast stove ( HBS ) technical parameters are determined.Mathematic model is established and adopted by computational fluid dynamics ( CFD ) .The transmission theory is studied for hot blast stove combustion and gas flow , and distribution results of HBS velocity field , CO density field and temperature field are achieved.Physical test model and hot trail unit are established , and the numeral calculation result is verified through test and investigation.3-D simulation design is adopted.HBS process flow and process layout are optimized and designed.Combustion air two-stage high temperature preheating technology is designed and developed.Two sets of small size DCHBSs are adopted to preheat the combustion air to 520-600℃.With the precondition of BF gas combustion , the hot blast stove dome temperature can exceed 1 420 ℃. According to DCHBS technical features , reasonable refractory structure is designed.Effective technical measures are adopted to prevent hot blast stove shell intercrystalline stress corrosion.Hot blast stove hot pipe and lining system are optimized and designed.After blowing in , the blast temperature keeps increasing , and the monthly average blast temperature reaches 1 300℃ when burning single BF gas.
基金Item Sponsored by National Natural Science Foundation(50104001)Science and Technology Tackle Key Foundation of Inner Mongolia(980307-4)
文摘The computer simulation of the combustion process in blast furnace(BF) stove has been studied by using the k-ε-g turbulent diffusion flame model.The combustion process in blunt annular ceramic burner was calculated by using the software.The profiles of gas and air velocity,temperature of the combustion products,concentration of the components,and the shape and length of the flame during combustion have been researched.Compared with the original annular ceramic burner,the new design of the blunt one improves the mixing of the gas and the air significantly,and shortened the length of the flame.
