Biochar, preparation method and application thereof, and biochar production and conveying system

Abstract

The invention provides biochar, a preparation method and application thereof and a biochar production and conveying system. The preparation method comprises the following steps: S1, carbonizing riverway bottom mud: firstly drying the riverway bottom mud, then performing pyrolysis and carbonization on the riverway bottom mud, cooling to room temperature after the pyrolysis and carbonization are completed, and grinding into powder to obtain charcoal powder; S2, activating the charcoal powder in the step S1: sequentially activating the charcoal powder in the step S1 by adopting ethanol, hydrochloric acid and sodium hydroxide, and finally drying and sieving to obtain the charcoal powder. The biochar is used for adsorbing dioxins, compared with traditional activated carbon, the biochar has the advantages of being high in carbon content, large in molecular weight, large in specific surface area and the like, the adsorption effect is better than that of the activated carbon, and the operation cost is further reduced due to the fact that river sediment is subjected to biochemical treatment.

Description

technical field [0001] The invention relates to the technical field of biochar, in particular to a biochar preparation method and a biochar production and delivery system. Background technique [0002] With the development of science and technology, iron and steel metallurgy and waste incineration will produce a lot of toxic and harmful smoke. The flue gas produced mainly includes: acid gas (HCl, HF, SOx, etc.), dust (particulate matter), heavy metals (Hg, Pb, Cr, etc.) and highly toxic organic pollutants (dioxin, etc.). [0003] Dioxin is mainly produced by the incineration of wastes containing chlorine pesticides, rust removers, plastics, synthetic resins, etc., and has been listed as a first-class carcinogen by the World Health Organization. It has a great impact on the environment in which people can survive. In order to meet the increasingly stringent national and local smoke emission standards and reduce the harm to the surrounding environment, the flue gas purificati...

AI Technical Summary

Problems solved by technology

This patent is impregnated first and then carbonized, which affects the activation effect of biochar, which is not conducive to the electrostatic interaction between the surface of biochar and dioxins, and is not suitable for the adsorption of dioxins in the ambient air.

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