Process for carrying out desulfurization on incineration flue gas generated by printing and dyeing sludge
A technology for incinerating flue gas, printing and dyeing sludge, applied in calcium/strontium/barium sulfate, dispersed particle separation, chemical instruments and methods, etc., to achieve the effects of low price, strong applicability and high purity
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[0061] Printing and dyeing sludge incineration flue gas desulfurization process, the process includes the following steps:
[0062] The lime slurry is used to absorb sulfur dioxide in the flue gas, and the flue gas reacts with the sulfur dioxide to generate calcium sulfite, which is then oxidized to calcium sulfate.
[0063] Above-mentioned technology comprises the following steps:
[0064] (1) Diffusion of sulfur dioxide in the air stream;
[0065] (2) Diffusion through the gas film;
[0066] (3) Sulfur dioxide is absorbed and changes from gaseous state to solution state, forming hydrate;
[0067] SO 2 (g) → SO 2
[0068] SO 2 + H 2 O→H + +HSO 3 -→2H + +SO 3 2-
[0069] (4) Diffusion of sulfur dioxide hydrate and ions in the liquid film;
[0070] (5) Digestion reaction
[0071] CaO+H 2 0→Ca(OH) 2
[0072] absorption reaction
[0073] Ca(OH) 2 + SO 2 → CaSO 3 + H 2 o
[0074] CaSO 3 + SO 2 + H 2 O → Ca(HSO 3 ) 2
[0075] Ca(HSO 3 ) ...
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