Conveying device of dry type desulfurizing agent

Abstract

The invention discloses a conveying device of a dry type desulfurizing agent. The conveying device comprises an oxidation fan, an oxidation air cooler, a dilute phase conveyer and a desulfurizing agent conveying pipe, wherein the dilute phase conveyor comprises a feeding hole, an air inlet and a discharging hole, the oxidation fan is connected to the air inlet of the dilute phase conveyor through the oxidation air cooler, the discharging hole of the dilute phase conveyor is connected with the desulfurizing agent conveying pipe, the desulfurizing agent conveying pipe extends into a slurry pond of a desulfurizing tower, and a scraper plate which is close to the surface of the inner wall and advances along the circumference direction of the surface of the inner wall under the drive of a drive mechanism is arranged at the inner wall of the outlet of the desulfurizing agent conveying pipe. The conveying device of the dry type desulfurizing agent, disclosed by the invention, has the advantage of preventing from scaling and blocking at the outlet of the desulfurizing agent conveying pipe.

Description

technical field [0001] The invention belongs to the technical field of wet flue gas desulfurization, and in particular relates to a conveying device for a dry desulfurizing agent used in a wet flue gas desulfurization system. Background technique [0002] In wet flue gas desulfurization, it is necessary to spray oxidizing air into the slurry pool of the absorption tower, and the oxidizing air will oxidize the calcium sulfite in the slurry pool of the absorption tower to calcium sulfate, and then crystallize into gypsum; at the same time, in order to neutralize the absorption tower spray SO 2 , HCL, HF and other acidic substances and to ensure that the pH in the absorption tower is at a stable value, it is necessary to add CaCO 3 Or CaO or NaOH or MgO and other desulfurizers. [0003] The Chinese Invention Patent Application Specification with Publication No. 102179162A discloses a delivery device and method for oxidizing air and dry desulfurizing agent, which uses oxidizin...

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Problems solved by technology

[0004] However, this conveying device has the following problems. Since the desulfurizing agent conveying pipe is passed into the slurry, the slurry will evaporate at the dry-wet separation interface at the outlet of the desulfurizing agent conveying pipe, and the dry ions formed by evaporation will accumulate in the desulfurizing agent conveying pipe. The inner wall of the outlet will cause fouling on the inner wall of the outlet. After a long time, it will cause the outlet to be blocked. Once blocked, the entire operation of the desulfurization system needs to be stopped, and the slurry in the pool must be drained to be dredged. The maintenance of the system is difficult and costly.

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