Calculation model and method for carrying out waste gas desulfurization by using micro-aeration, and real-time monitoring device and system

Abstract

The invention discloses a cyclic oxidation regulation and control model for removing sulfides (especially hydrogen sulfide) from waste gas through micro-aeration. The model is based on the following desulfurization process: inputting waste gas containing CO2 and H2S into a washing tower containing an acid-base monitoring and tail gas control device through a diffuser; conveying the alkaline absorption liquid in which the target gas is dissolved from the washing tower to a reaction tower; calculating the total amount of sulfur in the liquid phase; inputting a corresponding amount of oxygen intothe reaction tower through a diffuser based on the total amount of sulfur so as to oxidize sulfur in the liquid phase into elemental sulfur or sulfate ions; and conveying the reacted liquid back to the washing tower for cyclic utilization. The invention also relates to a desulfurization method based on the calculation model, a real-time monitoring device and a real-time monitoring system, which are used for low-cost long-acting odor and safety control. According to the calculation model, the method, and the real-time monitoring device and system, sulfur can be recycled while sulfur is effectively removed, energy consumption is greatly reduced, and the process cost is reduced. 本发明公开了一种以微曝气从废气中除去硫化物(尤其是硫化氢)的循环氧化调控模型，所述模型基于如下脱硫过程：将包含CO2和H2S的废气通过扩散器输入到含有酸碱监测与尾气控制装置的洗涤塔中；将溶解有目标气体的碱性吸收液从洗涤塔输送到反应塔；计算液相中硫的总量；基于硫的总量通过扩散器向反应塔中输入相应量的氧气以将液相中的硫氧化成硫单质或硫酸根离子；以及将反应后的液体重新输送回洗涤塔进行循环利用。本发明还涉及一种基于本发明的计算模型的脱硫方法、实时监控装置和系统用于低成本长效臭味与安全控制。本发明的计算模型、方法、实时监控装置和系统在有效除硫的同时还能将硫回收利用，大大节约了能源消耗并降低工艺成本。