A kind of ozone-hydroxyl free radical combined catalytic oxidation sludge conditioning method
A technology of catalytic oxidation and sludge conditioning, which is applied in the direction of oxidation treatment of sludge, sludge treatment, chemical instruments and methods, etc., can solve the problems of system processing capacity reduction, heavy labor of adding chemicals, damage to mountains, etc., and achieve moisture content Stable up to the standard, smooth sludge dewatering, and reduced usage
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Embodiment 1
[0029] A kind of ozone-hydroxy radical combined catalytic oxidation sludge conditioning method, comprises the following steps:
[0030] (1) Place the sludge with a moisture content of 92% in the first reaction tank, add a mixed solution of 30% ferrous sulfate heptahydrate and sulfamic acid with respect to the mass concentration of 33.3% of the sludge dry weight, stirrer 200r / min is stirred evenly, carries out mixed reaction, and the pH of sludge after the reaction is 5.5; The preparation method of the mixed solution of described ferrous sulfate heptahydrate and sulfamic acid is: ferrous sulfate heptahydrate and sulfamic acid are pressed 10: Mix at a weight ratio of 0.5, add water to prepare a solution with a mass concentration of 30%;
[0031] (2) The reaction product of step (1) is placed in the second reaction tank, adding a liquid hydrogen peroxide solution with a mass concentration of 3% relative to the dry weight of the sludge is 27%, and the mixer is stirred at 200r / min...
Embodiment 2
[0035] A kind of ozone-hydroxy radical combined catalytic oxidation sludge conditioning method, comprises the following steps:
[0036] (1) Place the sludge with a moisture content of 95.75% in the first reaction tank, add a mixed solution of 30% ferrous sulfate heptahydrate and sulfamic acid relative to the mass concentration of 50% of the dry weight of the sludge, and stirrer 275r / min stirs evenly, carries out mixed reaction, and the pH value of sludge after the reaction is 4.5; : mix at a weight ratio of 0.75, add water to be mixed with a solution whose mass concentration is 30%;
[0037] (2) Place the reaction product of step (1) in the second reaction tank, add a liquid hydrogen peroxide solution with a mass concentration of 5% relative to the dry weight of the sludge that is 28.5%, stir evenly with a mixer at 275r / min, and perform a mixed reaction;
[0038] (3) The product after the reaction in step (2) enters the enhanced reaction tank, and an aeration system is provi...
Embodiment 3
[0041] A kind of ozone-hydroxy radical combined catalytic oxidation sludge conditioning method, comprises the following steps:
[0042] (1) Place the sludge with a moisture content of 99.5% in the first reaction tank, add a mixed solution of 30% ferrous sulfate heptahydrate and sulfamic acid with respect to the mass concentration of 66.7% of the dry weight of the sludge, and stirrer 350r / min stirs evenly, carries out mixed reaction, and the pH value of sludge after the reaction is 5.5; : mix in a weight ratio of 1, add water to be mixed with a solution whose mass concentration is 30%;
[0043] (2) The reaction product of step (1) is placed in the second reaction tank, adding a liquid hydrogen peroxide solution with a mass concentration of 7% relative to the dry weight of the sludge is 30%, and the mixer is stirred at 350r / min to perform a mixed reaction;
[0044] (3) The product after the reaction in step (2) enters the enhanced reaction tank, and an aeration system is provide...
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