Sludge dehydrator and sludge dehydration method
A sludge dehydrating agent and sludge dehydration technology, which is applied in the field of environmental governance and sludge treatment and disposal, to achieve the effects of simple equipment, lower specific resistance and moisture content, and higher dehydration efficiency
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Embodiment 1
[0031] A chemical plant produces concentrated sludge with a moisture content of 97% every day. According to the small test results of the sludge, a sludge deep dewatering conditioner is prepared. In each liter of sludge, the composition of agent A: 3.2g of ferric chloride hexahydrate; group B Divided into: 0.1g calcium chloride, 4.9g 30% hydrogen peroxide. First, agent A was added to the concentrated sludge with a moisture content of about 97%, and the mixture was stirred for 15 minutes, and then agent B was added, and the stirring was continued for 15 minutes. After the sludge is conditioned by the conditioner, it is injected into the plate and frame filter press by the sludge pump, and the specific resistance after conditioning is determined to be 2.8×10 10 m / kg, the specific resistance is reduced nearly ninety times, and the moisture content of the obtained dry sludge is 20%.
Embodiment 2
[0033] A chemical plant produces concentrated sludge with a moisture content of 94% every day. According to the small test results of the sludge, a sludge deep dewatering conditioner is prepared. In each liter of sludge, the composition of agent A: 9.3g aluminum chloride; the composition of agent B is: : 0.4g calcium oxide, 4.8g calcium carbonate. First add agent A to the concentrated sludge with a moisture content of about 94%, stir for 15 minutes, then add agent B into it, and continue stirring for 15 minutes. After the sludge was conditioned by the conditioner, it was injected into the plate and frame filter press by the sludge pump, and the specific resistance after conditioning was determined to be 4.7×10 10 m / kg, the specific resistance was reduced by more than fifty times, and the moisture content of the obtained dry sludge was 15%.
Embodiment 3
[0035] A chemical plant produces concentrated sludge with a moisture content of 93% every day. According to the small test results of the sludge, a sludge deep dewatering conditioner is prepared. In each liter of sludge, the composition of agent A: 6.8g ferrous sulfate heptahydrate; group B Divided into: 0.9g calcium oxide, 1.5g calcium chloride. First add agent A to the concentrated sludge with a moisture content of about 93%, stir for 15 minutes, then add agent B into it, and continue stirring for 15 minutes. After the sludge was conditioned by the conditioner, it was injected into the plate and frame filter press by the sludge pump, and the specific resistance after conditioning was determined to be 9.3×10 9 m / kg, the specific resistance was reduced by more than 200 times, and the moisture content of the obtained dry sludge was 17%.
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