Harmless mud processing method for sewage treatment plant
A harmless treatment and sewage treatment plant technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of high energy consumption, secondary pollution, high cost, land occupation, etc., and achieve the purpose of inhibiting bacterial reproduction and even death, Increased mechanical strength, good for growth
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[0018] Example one
[0019] 1. The steps for preparing the cementing material are as follows:
[0020] (1) The weight percentages of building materials are: fluorine gypsum 50~80%, cement clinker 5%~20%, alkaline ash 5~15%, water quenching slag 10~20%, fly ash 5~15%, Accelerator 0.5-3%; the sum of the weight percentages of the above components is 100%;
[0021] (2) Neutralize the tailings of the AHF reaction process-fluorogypsum to PH>7, as the main raw material to the silo for standby;
[0022] (3) Cement clinker, alkaline ash, water quenching slag, and fly ash are sent to the silo for standby;
[0023] (4) Pass the above-mentioned raw materials into the hot air drying device according to the proportion through the automatic metering screw to remove the surface water and enter the mixed silo;
[0024] (5) After drying, the mixture enters the grinder and grinds to a fineness> 200 mesh;
[0025] (6) Add the coagulant to the ground mixture and enter the powder mixer to mix evenly, which be...
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[0041] Example two
[0042] A method for the harmless treatment of sludge in a sewage treatment plant. The steps are as follows: adding water-retaining materials to the original sludge to reduce the water content of the sludge to less than 65%, and then admixing cementing materials at room temperature and pressure. Mix evenly and air dry.
[0043] The mass ratio when the three are mixed is sludge (95% water content): cementing material: water retaining material=100:15-30:0.05.
[0044] The water-retaining material is a high-magnification water-absorbing resin provided by Wuhan Yuancheng Gongchuang Technology Co., Ltd.
[0045] The cementing material is industrial fluorogypsum as the main material, supplemented by cement clinker, metallurgical industry alkaline ash, water quenching slag, power industry fly ash, coagulant and the like. The weight percentages of the components of the cementing material are: fluorine gypsum 50%; cement clinker 10%, alkaline ash 12%; water quenching slag...
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[0053] Example three
[0054] The harmless treatment method of sewage treatment plant sludge, the steps are as follows: add water-retaining material to the original sludge to reduce the water content of the sludge to less than 65%, and then mix with the cementing material, and mix uniformly under normal temperature and pressure. Mix and dry naturally;
[0055] The mass ratio when the three are mixed is sludge (water content 70%): cementing material: water holding material = 100:15-30:0.01.
[0056] The water retention material is polyacrylate, vinyl acetate copolymer.
[0057] The cementing material is industrial gypsum as the main material, supplemented by cement clinker, metallurgical industry alkaline ash, water quenching slag, power industry fly ash, coagulant and the like. The weight percentage of each component of the cementing material is: phosphogypsum 73.5%, cement clinker 5%, alkaline ash 6%, water quenching slag 10%, fly ash 5%, and coagulant 0.5%. The said coagulant is...
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