Complex reagent capable of removing tin in sewage
A compound agent and wastewater technology, applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem that the depth of tin removal is difficult to reach the standard of drinking water, the resin is easily polluted, Incomplete regeneration and other problems, to achieve significant treatment effect, high efficiency of tin removal, no secondary pollution
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example 1
[0019] (1) Add polyaluminum chloride and polyacrylamide flocculants to the tin-containing wastewater to carry out flocculation and sedimentation treatment; (2) Add 30 ppm of organic ester and inorganic salt composite agents to the wastewater for removing suspended particles, of which cyclopropane 20ppm of ethyl formate, 5ppm of triethyl orthoacetate, and 5ppm of sodium hydrosulfide are fully stirred evenly, so that the tin in the wastewater exists in the form of divalent; Air valve, the steam-water mixture is released, and rises with the tiny bubbles until a layer of greasy substance is formed on the surface of the wastewater; (4) scrape off the upper layer of greasy substance with a slag scraper, which can reduce the tin in the wastewater from 258mg / L To 0.26mg / L, the tin removal rate reached 99.9%.
example 2
[0021] (1) Add polyaluminium chloride and polyacrylamide flocculant to the tin-containing wastewater to carry out flocculation and sedimentation treatment; (2) Add 40 ppm of organic ester and inorganic salt composite agent to the wastewater for removing suspended particles, in which chloroformic acid 20ppm of phenyl ester, 10ppm of diisopropyl phosphite, and 10ppm of sodium carbonate are fully stirred evenly, so that the tin in the waste water exists in the form of divalent; (3) The waste water is lifted into the pressure dissolved air tank with a steam-water mixing pump, and then the air valve is released , the soda-water mixture is released, and rises with tiny bubbles until a layer of greasy substance is formed on the surface of the wastewater; (4) Scraping the upper layer of greasy substance with a slag scraper can reduce the tin in the wastewater from 172mg / L to 0.086 mg / L, the tin removal rate reached 99.95%.
example 3
[0023] (1) Add polyaluminum chloride and polyacrylamide flocculants to the tin-containing wastewater to carry out flocculation and sedimentation treatment; (2) Add 50 ppm of organic ester and inorganic salt composite agent to the wastewater for removing suspended particles, in which orthoacetic acid 20ppm of triethyl ester, 20ppm of phenyl chloroformate and 10ppm of magnesium carbonate are fully stirred evenly, so that the tin in the waste water exists in the form of divalent; The soda-water mixture is released, and rises with tiny bubbles until a layer of greasy substance is formed on the surface of the wastewater; (4) Scraping the upper layer of greasy substance with a slag scraper can reduce the tin in the wastewater from 237mg / L to 0.071mg / L, the tin removal rate reached 99.97%.
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