Automatic desulfurization system and method for sintering flue gas

Abstract

The invention discloses an automatic desulfurization system and method for sintering flue gas, and belongs to the technical field of desulfurization of sintering flue gas. Automatic ash conveying of a lime feeder is realized by controlling the ash conveying amount according to the concentration of inlet sulfur dioxide, flow of inlet flue gas and the calcium-sulfur ratio. The method comprises the following steps: calculating the bring-in amount of sulfur in the flue gas of an inlet flue each hour according to the flow of the flue gas of the inlet flue and the concentration of the inlet sulfur dioxide; calculating the desulfurization amount of a desulfurization system in total hours according to set concentration of outlet sulfur dioxide; calculating hourly new ash consumption according to a set calcium-sulfur ratio for desulfurization; calculating an hourly feeding amount of each lime feeder according to an average distribution rule of the desulfurization system, and controlling the rotating speed of the lime feeder; calculating the concentration deviation of sulfur dioxide according to the measured concentration of outlet sulfur dioxide and the set concentration of the outlet sulfur dioxide; calculating an hourly sulfur amount deviation according to the inlet flow of flue gas; calculating adjustment hertz of a circulating feeder for adjustment according to a corresponding relation between the sulfur amount deviation and circulating ash.

Description

technical field [0001] The invention belongs to the technical field of sintering flue gas desulfurization, and in particular proposes a method for automatic desulfurization of sintering flue gas. Background technique [0002] Due to the needs of environmental protection, domestic metallurgical, electric power and other enterprises have begun to use flue gas desulfurization technology in large quantities. However, the following problems generally exist in the flue gas desulfurization production process: 1. The ability of independent innovation is low, and there is no effective solution to new problems that arise. For example, most enterprises adopt manual adjustment in the production of adding ash and water, and have been unable to realize automatic control. 2. Low desulfurization efficiency and serious waste of resources. In the actual production process, production personnel need to go to the site to check the equipment and adjust the amount of ash and water added based o...

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Problems solved by technology

[0003] In order to solve the problem that the pressure guide tube of the existing reactor pressure difference is too long and is greatly affected by the environment, it cannot be accurately measured. After maintenance experiments, the optimization of the reactor pressure difference detection method was carried out to achieve accurate measurement of the pressure difference.

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