Method for inhibiting generation of dioxin substances in waste incineration by using retardant
A technology of waste incineration and dioxins, which is applied in the fields of fuel additives, solid fuels, lighting and heating equipment, etc., can solve the problems of poor suppression effect and weak contact ability of flue gas particles, so as to reduce operating costs, low cost, Prepare simple effects
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Embodiment 1
[0032] 1. Preparation of sulfur and nitrogen doped hydrotalcite retarder
[0033] Mix calcium chloride, aluminum nitrate and sulfamide uniformly in the aqueous solution, the substance mass ratio is 2:1:4, under stirring condition, sodium hydroxide solution (1mol / L) is added dropwise into the solution, so that Solution pH = 9.0, then the mixture was stirred and aged at 60°C for 24h, filtered, washed with deionized water, centrifuged until the washing liquid was neutral, and finally dried at 60°C for 12h to obtain a sulfur and nitrogen doped hydrotalcite retarder. SEM image of sulfur nitrogen doped hydrotalcite retarder figure 1 shown.
[0034] 2. Inhibition methods for the generation of dioxins in waste incineration flue gas
[0035] First put the garbage into the incinerator for combustion, and then spray the sulfur and nitrogen doped hydrotalcite retarder directly into the flue area of the incinerator with a temperature range of 400-500°C. When suppressing the formation ...
Embodiment 2
[0037] Uniformly mix calcium chloride, magnesium chloride, aluminum nitrate and sulfamide in an aqueous solution, and the mass ratio of the substances is 1:1:1:4. Under stirring conditions, sodium hydroxide solution (1mol / L) is added dropwise to solution, make the pH of the solution = 10.0, then stir and age the mixture at 60°C for 24h, filter, wash with deionized water, centrifuge until the washing solution is neutral, and finally dry at 60°C for 12h to obtain sulfur nitrogen doped hydrotalcite barrier stagnant agent.
[0038] 2. Inhibition methods for the generation of dioxins in waste incineration flue gas
[0039] First put the garbage into the incinerator for combustion, and then spray the sulfur and nitrogen doped hydrotalcite retarder directly into the flue area of the incinerator with a temperature range of 300-400°C. When suppressing the formation of dioxins in burning garbage, the mass ratio of the added amount of retarder to the chlorine element in the flue is 20...
Embodiment 3
[0041] Mix calcium chloride, aluminum nitrate and sulfamide uniformly in the aqueous solution, and the mass ratio of the substances is 1:1:4. Under stirring conditions, sodium hydroxide solution (1mol / L) is added dropwise to the solution, so that The pH of the solution was 8.0, and then the mixture was stirred and aged at 60°C for 24 hours, filtered, washed with deionized water, centrifuged until the washing liquid was neutral, and finally dried at 60°C for 12 hours to obtain a sulfur nitrogen doped hydrotalcite retarder.
[0042] 2. Inhibition methods for the generation of dioxins in waste incineration flue gas
[0043] First put the garbage into the incinerator for combustion, and then spray the sulfur and nitrogen doped hydrotalcite retarder directly into the flue area of the incinerator with a temperature range of 400-500°C. When suppressing the formation of dioxins in burning garbage, the mass ratio of the retarder to the chlorine element in the flue is 300. It is dete...
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