Desulfurizing device

Abstract

The invention discloses a desulfurizing device which is used for removing sulfur dioxide and smoke dust in coal-fired flue gas. The desulfurizing device comprises a transversally arranged cylindrical casing, wherein ammonia water is accommodated on the lower side of the inside of the casing; a driving shaft is arranged in the axial line direction of the casing; a plurality of filtering rotary tables are arranged on the driving shaft side by side; a spiral groove is formed in the rotating surface of each filtering rotary table; filter screen cloth is arranged on at least one side surface of each spiral groove; two ring-shaped baffles are arranged adjacent to the two sides of each filtering rotary table and are parallel to the filtering rotary table. According to the desulfurizing device, through the adoption of the filtering rotary tables with the spiral groove structures, the contact area of flue gas and ammonia water is greatly enlarged, the dedusting efficiency is improved, and periodical stopping for cleaning scale can be further avoided under the condition that no additional cleaning device needs to be arranged, so that the desulfurizing device can realize continuous and efficient operation, the use amount of ammonia water is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to a deep purification technology for coal-fired flue gas emissions in industries such as electric power, chemical industry, metallurgy, and manufacturing, and in particular to a desulfurization device for removing sulfur in coal-fired flue gas. Background technique [0002] Coal-fired flue gas emissions from electric power, chemical industry, metallurgy, and manufacturing industries have a great impact on air pollution. Among them, harmful substances such as soot, sulfur dioxide, and nitrogen oxides contained in coal-burning flue gas are one of the root causes of air pollution, acid rain, and greenhouse effect. At present, my country has carried out large-scale flue gas desulfurization projects, but the flue gas emissions still cannot meet the current standard requirements, and further treatment is still needed. [0003] Existing desulfurization technology often adopts a mechanical demister on the top of the desulfurization towe...

AI Technical Summary

Problems solved by technology

[0005] However, the desulfurization device used in the existing ammonia desulfurization technology still has the defects of low contact efficiency between flue gas and ammonia water or ammonia gas, and the desulfurization effect is affected by the crystallization generated by the reaction and the accumulation of dust in the flue gas.

The efficiency of the spraying equipment set up to avoid regular shutdowns to clean up scaling is very low, and the amount of ammonia water is large, making it difficult to maintain the continuous and efficient operation of the desulfurization unit

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