Flue gas recirculation oxygen-enriched incineration sludge and muddy water cooperative treatment method

Abstract

The invention relates to a flue gas recirculation oxygen-enriched incineration sludge and muddy water cooperative treatment method. The method comprises the following steps: S1, enabling sludge to enter an oxygen-enriched incinerator through a sludge feeding device, enabling oxygen generated by an oxygen generation device to enter the oxygen-enriched incinerator through a fan, and incinerating thesludge in an oxygen-enriched environment; S2, in a flue gas recirculation mode, after dust removal is carried out on flue gas generated by incineration, returning part of the flue gas to an oxygen-enriched fluidized bed incinerator for fluidizing the sludge entering the incinerator, and supplementing heat in the incinerator; S3, carrying out deacidification treatment on the residual flue gas after dust removal; S4, capturing carbon dioxide from the flue gas subjected to deacidification treatment and storing the carbon dioxide through a carbon dioxide capture device; S5, injecting the flue gassubjected to deacidification and carbon dioxide capture into a biological reaction tank of a sewage treatment plant in a nano-bubble mode; and S6, discharging wastewater generated in the flue gas treatment process into the sewage treatment plant for treatment. According to the method, the problems that the sludge incineration flue gas amount is large, the concentration of generated nitrogen oxides is large, and chimneys are used are solved.

Description

technical field [0001] The invention relates to a flue gas recirculation oxygen-enriched incineration sludge and a mud-water synergistic treatment method, which belongs to the field of solid waste treatment. Background technique [0002] In recent years, with the rapid development of my country's economy and the acceleration of urbanization, the amount of urban sewage treatment and the corresponding amount of sludge generated in my country have grown rapidly. At the same time, with the development of the economy to a higher level and the continuous improvement of people's living standards, the requirements for environmental protection are getting higher and higher. The previous situation of heavy water and light mud has been greatly changed, and the requirements for sludge treatment are increasing and attention is increasing. . [0003] There are many sludge treatment and disposal routes. The treatment links include deep dehydration, anaerobic digestion, drying, incineratio...

AI Technical Summary

Problems solved by technology

However, there are certain problems in the traditional sludge incineration technology, such as the large amount of flue gas produced and the "NIMBY effect" caused by the towering chimneys, etc., which bring unfavorable factors to the healthy development of the sludge drying and incineration technology route.

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