Research On Desulphurization By FeSO₄ Aqueous Catalytic Oxidation And By Using The Serosity Of White Sludge Or Salt Sludge Of Ammonia Alkali Mills

Researches on Desulphurization by FeSO₄ Aqueous Catalytic Oxidation and by using the Serosity of White Sludge or Salt Sludge of Ammonia Alkali Mills were studied.Contrastive experiments of desulphurization by tap water with active carbon and porcelain Raschig ring fillers were studied. The results indicated that SO₂ removal efficiency with active carbon as filler was better than that with porcelain Raschig ring as filler, whether their macroscopic surface areas or heights were equal. Then the experiment of desulphurization by FeSO₄ aqueous catalytic oxidation in active carbon tower was studied, and the effect of liquid-gas ratio, superficial gas flow rate, absorption temperature and inlet concentration of SO₂ was studied too. The synthesis experiment showed that desulphurization efficiency and absorbent pH could keep up more than 93.5% and about 4.6 respectively after 500 minutes'continuous run. The change trend of desulphurization efficiency and absorbent pH was consistent basically. Using MATLAB compute language programme, the equation of simulation relation between desulphurization efficiency and all factors was drawn up:η= 0 .00057259·exp(7.5823·(L /G)^{0 .0078910}·ν_空^{-0 .011970}·C_so2^{-0. 0065149}·t^-0.0072098).The average relative error which was caused from computing with this equation was less than 5%.Using activated carbon with greater comparative surface-area as filler was put forward for the first time in the field of flue gas desulphurization in this research. As this, it could advance desulphurization efficiency and reduce running fee. It provided a new approach of reclaiming sulfur resource from flue gas with low concentration SO₂ for our national research.At present, the method of wet lime stone / lime– abandon is the main flue gas desulphurization technology in the world. The desulfurizer lime stone/lime occupies greater specific gravity in the desulphurization cost. And in the production process of desulfurizer, it will cause certain environmental pollution too. During the production in ammonia alkali factory, it produced a great deal of waste sediment (containing white sludge and salt sludge) which was mostly piled up on the ground because of not being used abundantly. As this, not only occupied it plenty of valuable earth, but also brought about infinite pollution. Entrusted by Qingdao Alkali Factory, the systematic investigation of taking off SO₂ from flue gas with the waste sediment of ammonia...