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Composite sludge conditioner

A sludge conditioner and conditioner technology, which is applied in sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of not achieving dehydration effect and increasing the difficulty of sludge dehydration, and achieve structural Dense, strong shear resistance, not easy to break

Pending Publication Date: 2021-01-05
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the surface charge and other factors, the solid particles in the sludge and the hydration layer wrapped on the surface form a stable colloidal suspension, which also greatly increases the difficulty of sludge dewatering.
The development of existing chemical sludge conditioners generally refers to the principle and method of preparation of water treatment flocculation agents and adopts single-component conditioning, but single-component sludge conditioners often fail to achieve ideal dehydration effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 150 g of polyaluminum chloride, 100 g of β-cyclodextrin-polyacrylamide polymer, 200 g of dodecyldimethylammonium chloride, 150 g of sodium bicarbonate, and 400 g of fly ash, and mix them at room temperature Blast drying under the conditions for 30 minutes, crushed to 50-200 mesh, and made into composite sludge conditioner.

[0025] Add the composite sludge conditioner of this embodiment to the sludge with a water content of 98%. The amount of the composite sludge conditioner is 10% of the absolute dry weight of the sludge. Stir for 30 min and press with a plate and frame filter press. Filtration and dehydration, the dehydration pressure is 1.5 Mpa, the dehydration and filtration time is 30 minutes, and then the pressure is released and the material is discharged. The moisture content of the test sludge is 37%.

Embodiment 2

[0027] Mix 200 g of polyferric sulfate, 150 g of β-cyclodextrin-polyacrylamide polymer, 100 g of cetyltrimethylammonium bromide, 200 g of sodium carbonate, and 350 g of fly ash. Blow drying for 30 minutes, crush to 50-200 mesh, and make composite sludge conditioner.

[0028] Add the composite sludge conditioner of this embodiment to the sludge with a water content of 98%. The amount of the composite sludge conditioner is 10% of the absolute dry weight of the sludge. Stir for 30 min and press with a plate and frame filter press. Filtration and dehydration, the dehydration pressure is 1.5 Mpa, the dehydration and filtration time is 30 minutes, and then the pressure is released and the material is discharged. The moisture content of the test sludge is 43%.

Embodiment 3

[0030] Polyferric sulfate 100 g, polyaluminum chloride 150 g, β-cyclodextrin-polyacrylamide polymer 50 g, dodecyl dimethyl ammonium chloride 150 g, sodium carbonate 50 g, sodium bicarbonate 150 g g. 350 g of fly ash was mixed thoroughly, blown and dried for 30 minutes at room temperature, and crushed to 50-200 mesh to make a composite sludge conditioner.

[0031] Add the composite sludge conditioner of this embodiment to the sludge with a water content of 98%. The amount of the composite sludge conditioner is 10% of the absolute dry weight of the sludge. Stir for 30 min and press with a plate and frame filter press. Filtration and dehydration, the dehydration pressure is 1.5 Mpa, the dehydration and filtration time is 30 minutes, and then the pressure is released and the material is discharged. The moisture content of the test sludge is 44%.

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PUM

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Abstract

The invention belongs to the technical field of sludge conditioning and dehydration. The invention provides a composite sludge conditioner. The composite sludge conditioner is prepared from the following raw materials in percentage by weight: 15%-25% of an inorganic polymeric flocculant, 5%-15% of an organic flocculant, 10%-20% of a cationic surfactant, 10%-20% of a regulator and 20%-55% of a sludge conditioning bulking agent. The composite sludge conditioner is high in dehydration efficiency and low in use amount, the addition amount of the composite sludge conditioner is only 10% of the absolute dry weight of sludge, and the water content of the sludge with the water content of 98% can be reduced to 50% or below after filter pressing dehydration.

Description

technical field [0001] The invention belongs to the technical field of sludge conditioning and dehydration, and in particular relates to a composite sludge conditioner for sludge dehydration. Background technique [0002] With the increase of population and the development of industrial production, the discharge of domestic sewage and industrial sewage is increasing day by day. As the final product of sewage treatment, the output of sludge has also greatly increased. The composition of sludge is complex, and it is a mixed aggregate of various complex components such as colloids and metal salts in sewage mixed with suspended solids, microorganisms and adsorbed organic matter as the main body. Sludge not only has complex components, but also has the characteristics of high water content, high organic matter content, strong hydrophilicity, difficult dehydration, and serious pollution. It is estimated that the sludge output of China's urban sewage treatment plants has exceeded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148
CPCC02F11/148
Inventor 孙松厚冯春晖石伟杰周继柱朱希坤王国瑞郑博英崔秀菊
Owner 神美科技有限公司
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