Renewable devulcanizing technological process and use thereof

Abstract

The invention discloses a renewable desulfurization process method and the application thereof. The process flow comprises water washing and cooling of desulfurized flue gas, absorption and desorption of SO2 and heat supply of the desorption process. The process flow is characterized in that at least part of the heat energy required by the desorption process is provided by physical sensible heat of mixed gas discharged by a desorber and latent heat of vaporization of water vapor in the mixed gas, and is used for solving the problems of high energy and water consumption in the desulphurization process. The invention also comprises the application of the renewable desulphurization process flow, for example, the process flow can be used in flue gas desulfurization in a sintering system of a steel plant, the flue gas desulfurization of iron-making blast furnace gas, etc. The process method and the application have the main advantages of saving energy and water, and reducing heat pollution to environment at the same time.

Description

technical field [0001] The invention relates to a renewable desulfurization process and its application, which is mainly applicable to the renewable desulfurization of sulfur-containing flue gas, and can be applied to the sulfur-containing flue gas of the sintering system, the gas of the ironmaking blast furnace, and the flue gas of the heating furnace and boiler. In the field of gas desulfurization treatment. 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 process, the main process of which is similar to the process of the above-mentioned ...

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

It should be noted that the heat absorbed by the cooling water accounts for more than half of the total energy consumption of the method. Therefore, the circulation of the cooling water is too large and the consumption is increased, which is another disadvantage of the above-mentioned process. an important deficiency

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