Method for washing and regenerating catalyst of catalytic flue gas desulfurization device

Abstract

The invention discloses a method for washing and regenerating a catalyst of a catalytic flue gas desulfurization device, which can be used for cooling the catalyst and then washing and regenerating the catalyst so as to solve the technical problem that the catalyst is broken due to a relatively large temperature difference before and after the catalyst is cooled. Comprising the following steps: spraying a cooling liquid into a flue gas inlet passage to cool the flue gas, then introducing the cooled flue gas into a desulfurization reactor, enabling the cooled flue gas to pass through a catalyst, carrying heat in the catalyst, and then discharging from an exhaust port, and after the catalyst is cooled to a set condition, starting the spraying device, and spraying a regeneration liquid to the catalyst through the spraying device so as to wash and regenerate the catalyst and discharge the regeneration liquid from the liquid outlet. According to the method, the flue gas is cooled by spraying the cooling liquid, and then the catalyst is washed and regenerated, so that the technical problem that the catalyst is broken due to relatively large temperature difference between the catalyst and the catalyst is effectively solved, meanwhile, the catalyst cooling gas can be saved, and the operation cost is reduced.

Description

technical field [0001] The embodiments of the present application relate to the technical field of flue gas desulfurization, and in particular to a catalyst washing and regeneration method of a catalytic flue gas desulfurization device, a drainage structure of a regeneration liquid of a catalytic flue gas desulfurization device, and a catalytic flue gas desulfurization tower. Background technique [0002] Catalytic flue gas desulfurization technology is a known desulfurization technology with promising application. sulfuric acid. When the sulfuric acid adhering to the catalyst reaches a certain level, the catalyst can be washed with a regeneration solution (usually using dilute sulfuric acid and / or water) to remove the adhering sulfuric acid on the catalyst and release the active sites of the catalyst. The used regeneration solution can be reused as a by-product (usually dilute sulfuric acid). Relevant references include: "Current Situation and Trend of Catalytic Flue Gas ...

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Problems solved by technology

[0005] The embodiment of the present application provides a catalytic flue gas desulfurization device catalyst washing and regeneration method, which can be washed and regenerated after cooling the catalyst to solve the technical problem that the catalyst is broken due to the large temperature difference between the front and back

The method of the first aspect mentioned above first cools down the catalyst through the catalyst cooling gas whose temperature is lower than that of the flue gas during desulfurization, and then washes and regenerates the catalyst, which can effectively solve the technical problem of the catalyst being broken due to the large temperature difference between the front and back.

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