Special environment-friendly slag and ash removal agent for biomass boiler

Abstract

The invention discloses a special environment-friendly slag and ash removal agent for a biomass boiler. The special environment-friendly slag and ash removal agent for the biomass boiler is characterized by being formed by emulsification dispersion of components in percentage by weight as follows: 20-30% of citric acid, 20-35% of aluminium nitrate, 2-3% of basic nickel carbonate, 5-10% of rare earth chloride, 1-2% of dolomite powder, 10-15% of positive bentonite, 8-10% of fluorite powder, 0.5-2% of a modulating agent, 5-7% of an emulsifying agent and the balance of water. The agent can reduce the adhesive capacity of acidic slag and enables the acidic slag to be hardened and embrittled to fall off under the scouring action of flue gas; the positive bentonite is added to raw materials, can adsorb a large quantity of potassium and sodium metal ions produced during combustion and can reduce the content of alkali metal in the flue gas; the aluminium nitrate and the dolomite powder can have chemical reactions with fly ash under the systematic catalytic action of the rare earth chloride, double salt slag capable with the high ash-melting point is produced through combination, the concentration of the fly ash in the flue gas can be greatly reduced, and the deposited ash is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel additives for biomass boilers, in particular to an environmentally friendly slag and ash removal agent for biomass boilers. Background technique [0002] In recent years, with the increasingly prominent issues of energy and environmental protection, biomass, as a renewable energy source, has been paid more and more attention to by countries all over the world due to its rich resource reserves and environmental protection characteristics. At present, after several years of introduction and absorption, domestic biomass direct combustion technology is becoming more and more mature, and the number of operating biomass boilers is also increasing day by day. [0003] Completely different from coal-fired boilers, biomass boilers are mostly plant-based fuels, which are rich in alkali metals such as potassium, sodium, calcium, etc., and a large amount of fly ash produced after combustion in the furnace is eas...

AI Technical Summary

Problems solved by technology

However, because biomass fuel itself contains a large amount of chlorine, potassium and other elements, the atmosphere in the furnace formed after combustion is relatively complicated. The ash and slagging contain both ferrous sulfate formed by sulfite corrosion and a large amount Potassium chloride, silicon dioxide and other compounds, the chemical composition is very complex