The traditional blast furnace gas treatment technology and the current status of blast furnace gas fine desulfurization technology are introduced in response to the characteristics of large blast furnace gas volumetric flow rate and complex composition in the steel industry.Based on the characteristics of sulfur com-ponents in blast furnace gas,the different process treatment methods for organic sulfur(COS)and inorganic sulfur(H2S)in blast furnace gas are analyzed in detail.The"catalytic hydrolysis+oxidation absorption method"of blast furnace gas fine desulfurization treatment process route for source treatment is proposed,which can be combined with the practical working conditions of steel plant,and the hydrolysis system can be applied before or after TRT.This process route is dry desulfurization,which can effectively remove the total sulfur content in the gas,and there is no wastewater generated throughout the process,without causing secondary pollution.It is a simple,efficient,and energy-saving process route suitable for fine desulfurization of blast furnace gas.
The transformation of water beam of walking beam heating furnace from water cooling to vaporization cooling,and the forced circulation vaporization cooling system are introduced.The calculation of cycle reliability,the design of water beam and column,the dislocation arrangement of water beam,safety measures and the volume design requirements of soft water tank and drum are studied.Through the transformation,the gas consumption is reduced,steam recovery is realized,and the process energy consumption is reduced by 14％.
In order to strengthen the energy-saving control of heating furnace,based on therm-engi-neering characteristics of regenerative burner,the key factors of improving the thermal efficiency of heating furnace are analyzed,and the best therm-engineering parameters are summarized,such as efficiency of re-generator,the exhaust control strategy,charging temperature and heat dissipation of furnace.The main con-trol factors of regenerative burner in the heating process are proposed.
The combustion characteristics of a flameless burner are studied through experiments,and the results show that flameless combustion has significant advantages such as good furnace temperature uniformity,low combustion noise,and ultra-low nitrogen emissions.When this technology is successfully applied to the steel rolling heating furnace,it can reduce NOx emissions by more than 60％,which is a green and environmentally friendly combustion technology worth promoting and applying.
绿色发展是破解资源、能源、环境瓶颈制约的关键所在,是实现制造业可持续发展的必由之路.党的十八大报告首次将绿色发展,循环发展,低碳发展并列提出.绿色是发展的新要求,循环是提高资源效率的途径,低碳是能源战略调整的目标,三者均要求节约资源,能源,提高资源、能源利用效率;均要求保护环境,充分考虑生态系统承载能力,减轻污染对人类健康的影响;目标都是形成节约资源,能源和保护生态环境的产业结构,增长方式和消费模式,以促进生态文明建设.
