Method for comprehensively utilizing tail gas of sludge phosphorus-prepared sodium hypophosphite
A technology of sodium hypophosphite and sodium hypochlorite solution, applied in the directions of hypophosphorous acid, phosphorus oxyacid, separation method, etc., can solve the problems of long process, high risk, environmental pollution, etc., and achieves improved absorption efficiency, good gas scrubbing effect, The effect of high absorption efficiency
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[0029] Example one
[0030] Take 21.03g of mud phosphorus from Kunyang Phosphorus Fertilizer Plant with an average phosphorus content of 33.1%, containing about 6.98g of phosphorus, according to the ratio of water to phosphorus 105:1, alkali to phosphorus ratio 3.5:1, and the ratio of sodium hydroxide to calcium hydroxide is Enter the reactor at 5:1, control the temperature at 85°C for reaction, and the carrier gas nitrogen flow rate is 20mL / min.
[0031] The scrubbing liquid is 80% concentrated phosphoric acid;
[0032] Fill the primary absorption tube with 100 mL of 0.75% NaClO solution, pH=9;
[0033] Fill the secondary absorption tube with 100 mL of 7% NaClO solution, pH=9;
[0034] Fill the tertiary absorption tube with 100 mL of 7% NaClO solution, pH=13;
[0035] Put 80.01g of modified activated carbon in the adsorption tube.
[0036] The results of the absorption test are as follows:
[0037] Table 1 Absorption test results
[0038] test results
[0039] The results of the adsor...
Example Embodiment
[0042] Example two
[0043] Take 19.68g of mud phosphorus from Kunyang Phosphorus Plant with an average phosphorus content of 45.1%, containing about 8.87g of phosphorus, according to the ratio of water to phosphorus 105:1, alkali to phosphorus ratio 3.5:1, sodium hydroxide and calcium hydroxide The ratio of 5:1 enters the reactor and reacts at a temperature of 80°C, and the nitrogen carrier gas flow rate is 25 mL / min.
[0044] The scrubbing liquid is 85% concentrated phosphoric acid;
[0045] Fill the primary absorption tube with 100 mL of 0.75% NaClO solution, pH=9;
[0046] Fill the secondary absorption tube with 100 mL of 7% NaClO solution, pH=9;
[0047] Fill the tertiary absorption tube with 100 mL of 7% NaClO solution, pH=13;
[0048] 90.21g modified activated carbon is placed in the adsorption tube.
[0049] The results of the absorption test are as follows:
[0050] Table 3 Absorption test results
[0051] test results
[0052] The results of the adsorption test are as follows...
Example Embodiment
[0055] Example three
[0056] Take 22.84g of sludge phosphorus from Kunyang Phosphorus Plant with a phosphorus content of 35.6%, with a phosphorus content of about 8.13g, according to the water-to-phosphorus ratio 105:1, the alkali-phosphorus ratio 3.5:1, and the ratio of sodium hydroxide and calcium hydroxide It is 5:1 into the reactor and reacts at a temperature of 90°C, and the nitrogen carrier gas flow rate is 40 mL / min.
[0057] The scrubbing liquid is 90% concentrated phosphoric acid;
[0058] Fill the primary absorption tube with 100 mL of 0.75% NaClO solution, pH=9;
[0059] Fill the secondary absorption tube with 100 mL of 7% NaClO solution, pH=9;
[0060] Fill the tertiary absorption tube with 100 mL of 7% NaClO solution, pH=13;
[0061] 99.83g of modified activated carbon is placed in the adsorption tube.
[0062] The results of the absorption test are as follows:
[0063] Table 5 Absorption test results
[0064] test results
[0065] The results of the adsorption test are a...
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