2results about How to "Low Sulfate Content" patented technology

The utility model discloses a kind of high-concentration hemicellulose wastewater treatment systems, it is related to high-concentration hemicellulose wastewater treatment technical field, including the adjusting pool, fenton reaction pool, fenton sedimentation tank, multistage hydrolysis acidification pool and lifting pool connected in order, the adjusting pool water inlet is connected with high-concentration hemicellulose wastewater pipeline, non-ferrous wastewater pipeline and acidic wastewater pipeline, adjusting pool and fenton reaction pool between being provided with dispensing room, and ferrous sulfate storage tank, hydrogen peroxide storage tank and PAM storage tank are provided in dispensing room, ferrous sulfate storage tank and hydrogen peroxide storage tank are connected with fenton reaction pool water inlet respectively, and PAM storage tank is connected with fenton reaction pool, fenton reaction pool is also connected with alkali tank, the fenton sedimentation tank bottom is provided with sludge pump, and the lifting pool water outlet is connected with polymeric ferric sulfate storage tank. Through pre-fenton system combination multistage anaerobic treatment unit realizes the efficient decomposition of hemicellulose, lignin and other refractory substances, and cooperates subsequent advanced treatment to ensure that effluent COD is stable and up to standard.

The utility model relates to the technical field of phosphorite decomposition, and particularly provides an ammonium sulfate acidifying and circularly decomposing phosphorite device which comprises a pre-decomposition reaction tank, an acidolysis reaction tank, a first filter, a desulfurization reaction tank, a second filter, an acidolysis dephosphorization reaction tank and a third filter which are sequentially connected through pipelines and pumps, wherein the pre-decomposition reaction tank is provided with a phosphoric acid feeding port, the acidolysis reaction tank is provided with an acidified ammonium sulfate feeding port, filter residues of the first filter are conveyed to the acidolysis reaction tank through a conveying belt, the desulfurization reaction tank is provided with a phosphorite feeding port, and filter residues of the second filter are conveyed to the pre-decomposition reaction tank through a conveying belt. Filter residues of the third filter are conveyed out of the ardealite through a conveying belt. Phosphorite is decomposed through acidified ammonium sulfate, a crude ammonium phosphate solution and ardealite can be obtained, impurities of a product are continuously removed through raw materials subsequently, the content of sulfate radicals in the ammonium phosphate solution can be reduced, and agricultural monoammonium can be directly produced on the downstream. The content of phosphorus pentoxide in the phosphogypsum can also be reduced.