Flue gas desulfurization system

Abstract

The invention discloses a flue gas desulfurization system. The flue gas desulfurization system comprises an absorption tower, a wet type electric dust collector, a dehydrating unit and a circulating unit, wherein the absorption tower further comprises a slurry tank which is arranged at the bottom layer of the absorption tower, a flue gas inlet for introducing flue gas into the absorption tower, aspraying device arranged above the flue gas inlet, and a flue gas outlet which is formed in the top of a desulfurization tower. Through the absorption effect of the absorption tower, further dust removal is performed through the wet type electric dust collector, so that a sulfur component and other harmful components in the flue gas are removed, and a second product generated by absorption effectof the absorption tower is processed. Compared with the prior art, the flue gas desulfurization system can improve desulfurization efficiency, reduces corrosion loss in desulfurization reaction, can recycle wastewater generated in a recycling process, and is environmentally friendly and energy-saving.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a flue gas desulfurization system. Background technique [0002] Petroleum coke components are hydrocarbons, containing 90-97% carbon, 1.5-8% hydrogen, and nitrogen, chlorine, sulfur and heavy metal compounds. Petroleum coke is calcined to produce sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, Hydrocarbons, nitrogen oxides, etc., part of the sulfur dioxide and dust in the flue gas are not purified and discharged from the chimney of the calcination plant, which affects the environment. [0003] With the continuous improvement of my country's sulfur dioxide emission standards, and the sulfur content of coal has increased compared with before, the existing desulfurization process can no longer meet the relevant requirements. Furthermore, in the existing desulfurization process, due to the corrosion in the desulfurization reaction, th...

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Problems solved by technology

[0002] Petroleum coke components are hydrocarbons, containing 90-97% carbon, 1.5-8% hydrogen, and nitrogen, chlorine, sulfur and heavy metal compounds. Petroleum coke is calcined to produce sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, Hydrocarbons and nitrogen oxides, etc. Part of the sulfur dioxide and dust in the flue gas are not purified and discharged from the chimney of the calcination plant, which affects the environment

[0003] With the continuous improvement of my country's sulfur dioxide emission standards, and the sulfur content of coal combustion has also increased compared with before, the existing desulfurization process can no longer meet the relevant requirements

Furthermore, in the existing desulfurization process, due to the corrosion in the desulfurization reaction, the equipment loss is relatively serious, especially the accessories in the reaction system, which generally need to be replaced every 3 to 5 years

In addition, a large amount of water is required in the process of desulfurization reaction, and a large amount of water is also required in the cleaning and maintenance of equipment. Most of the waste water obtained in the desulfurization process in the prior art will be wasted

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