硫化氢制酸焚烧炉的模拟分析

Simulation and Analysis of Hydrogen Sulfide to Acid Incinerator

焚烧炉温度是硫化氢制酸焚烧炉的一个重要指标,由于酸性气组份特别是H2S和CxHy变化会显著影响焚烧炉温度,双闭环比值控制不太适用。采用炉尾温度作为主调节的第三参数,与比值调节系统组成串级比值调节系统,通过温度控制回路给出一个调节系数来改变配风比(配入的空气量与酸性气量的比值)来适应酸性气组分的变化。本文分别使用Aspen Plus软件和Hysys软件建立了焚烧炉的稳态和动态模型。先通过稳态模拟来选择合适的焚烧温度,并计算硫化氢浓度波动时,焚烧炉温度固定时配风比的变化。再通过动态模拟来分析了H2S和CxHy浓度剧烈波动时焚烧炉温度的动态响应。通过模拟分析认为硫化氢制酸焚烧炉控制温度为1100℃,并采用串级比值调节系统可以有效解决酸性气组分剧烈波动带来的影响。

Incinerator temperature is an important index of hydrogen sulfide to acid incinerator.Because the change of acid gas components,especially H 2S and C xH y,will significantly affect the incinerator temperature,the double closed-loop ratio control is not suitable.The temperature at the end of the furnace is used as the third parameter of the main regulation,and the ratio regulation system is composed of a cascade ratio regulation system.A regulation coefficient is given by the temperature control circuit to change the air gas ratio(the ratio of the air flow and the acid gas flow)to adapt to the change of the acid gas component.In this paper,the steady-state and dynamic models of incinerator are established by using Aspen Plus software and Hysys software respectively.Firstly,the appropriate incineration temperature is selected by steady-state simulation,and the change of the air gas ratio is calculated when the concentration of hydrogen sulfide fluctuates and the temperature of incinerator is fixed.The dynamic response of the incinerator temperature to the violent fluctuation of H 2S and C xH y concentration is analyzed by dynamic simulation.The simulation analysis shows that the control temperature of the incinerator is 1100℃,and the cascade ratio regulation system can effectively solve the impact of the violent fluctuation of acid gas components.