Renewable devulcanization technological process and use thereof

Abstract

The invention relates to a technique of renewable desulfurization, and the application thereof. The technique comprises the steps of the washing and cooling of desulfurated flue gas, the absorption and desorption of SO2 and heat energy supply during a desorption process and is characterized in that: at least part of heat energy required during the desorption process is supplied by the physical sensible heat carried by the flue gas to be desulfurated so as to solve the problems that during the desulfurization process, on the one hand, a great amount of steam is consumed for heating, and on the other hand flue gas needs to be cooled quickly at very low temperature in a pre-washing tower, thus leading to dual energy consumption. The invention also relates to the application of the technique of the renewable desulfurization, for example, flue gas desulfurization applicable to a sintering system of a steel plant, the flue gas desulfurization applicable to ironmaking blast furnace gas and the like. The technique and the application have the advantages of saving energy and water as much as possible and reducing heat pollution to the environment while saving energy.

Description

technical field [0001] The invention relates to a renewable desulfurization process and its application, which is mainly suitable for the renewable desulfurization of sulfur-containing flue gas, especially for the desulfurization treatment when the flue gas temperature is greater than 120°C, and can be applied to the sulfur-containing flue gas in the sintering system. In the field of desulfurization treatment of sulfur flue gas, ironmaking blast furnace gas and heating furnace flue gas. Background technique [0002] In the publicity materials distributed by Kangshifu Technology Environmental Protection (Shenzhen) Co., Ltd., a renewable desulfurization process is introduced. This method mainly uses amine liquid to absorb SO in flue gas 2 , and during the desorption process, high-purity SO 2 and recovery amine solution to absorb SO in flue gas 2 The ability to make the amine solution reusable. [0003] At present, there is another ion-based renewable desulfurization proces...

AI Technical Summary

Problems solved by technology

Although the composition of the absorption liquid used by the ion method is different from that of the amine method, the absorption liquid has a certain effect on SO 2 The function of selective absorption is roughly the same

[0004] The main disadvantages of the above process methods are: on the one hand, a large amount of steam needs to be consumed for heating during the desorption process;

Another disadvantage of this process method is that the physical sensible heat and latent heat of vaporization of the water vapor in the mixed steam discharged from the desorption tower cannot be utilized, which not only causes waste of energy, but also absorbs this part of heat through cooling water, which again double waste

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