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Quick dewatering process for city watercourse sludge

A technology for rapid dewatering of river silt, applied in water/sludge/sewage treatment, dewatering/drying/concentrated sludge treatment, sludge treatment, etc. It can solve problems such as poor dewatering effect and substandard discharge of sludge residual water. , to achieve the effect of being conducive to promotion and application, good dehydration effect, and improving dehydration effect

Active Publication Date: 2016-07-20
广州珞珈环境技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of poor dehydration effect in the sludge dewatering process in the prior art, the residual sludge water has the defect of substandard discharge

Method used

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  • Quick dewatering process for city watercourse sludge
  • Quick dewatering process for city watercourse sludge
  • Quick dewatering process for city watercourse sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, a kind of rapid dehydration process of urban river silt

[0029] S1 Put the silt in the river channel into the storage tank through the cutter suction boat or excavator, remove the impurities of the silt, thicken it and stir it to get the mud;

[0030] S2 Stir the mixture obtained in step S1 evenly, sprinkle 0.05% of the total weight of the mud on the surface of the polyanionic cellulose, let it stand for 20 minutes, remove the viscous liquid on the surface, and perform preliminary dehydration to obtain the initial dewatered slurry;

[0031] S3 is the composite flocculant of 90mg / L to the concentration of 0.01% of the initial dewatered slurry obtained in step S2, and the composite flocculant is composed of polyferric sulfate, polyanionic cellulose and chitosan oligosaccharide The weight ratio is 1:1:5, stirred evenly, and after standing for 60 minutes, the mud is put into the belt filter press with a screw pump. The washing water pressure of the upper and ...

Embodiment 2

[0032] Embodiment 2, a kind of rapid dehydration process of urban river silt

[0033] S1 Put the silt in the river channel into the storage tank through the cutter suction boat or excavator, remove the impurities of the silt, thicken it and stir it to get the mud;

[0034] S2 Stir the mixture obtained in step S1 evenly, sprinkle 0.08% of the total weight of the slurry on the surface of the slurry with polyanionic cellulose, let it stand for 15 minutes, remove the viscous liquid on the surface, and perform preliminary dehydration to obtain the initial dewatered slurry;

[0035] S3 adds the concentration of 0.04% of the initial dewatered slurry gross weight to the initial dewatered slurry obtained in step S2 and is a composite flocculant of 80mg / L, and the composite flocculant is composed of polyferric sulfate, polyanionic cellulose and chitosan oligosaccharide The weight ratio is 2:1:4, stir evenly, and after standing for 50min, use a screw pump to put the mud into the belt fil...

Embodiment 3

[0036] Embodiment 3, a kind of rapid dehydration process of urban river silt

[0037] S1 Put the silt in the river channel into the storage tank through the cutter suction boat or excavator, remove the impurities of the silt, thicken it and stir it to get the mud;

[0038]S2 Stir the mixture obtained in step S1 evenly, sprinkle 0.1% of the total weight of the mud on the surface of the polyanionic cellulose, let it stand for 10 minutes, remove the viscous liquid on the surface, and perform preliminary dehydration to obtain the initial dewatered slurry;

[0039] S3 adds the concentration of 0.08% of the initial dewatered slurry gross weight to the initial dewatered slurry obtained in step S2 and is a composite flocculant of 70mg / L, and the composite flocculant is composed of polyferric sulfate, polyanionic cellulose and chitosan oligosaccharide The weight ratio is 3: 2: 3, stir evenly, and after standing for 40 minutes, use a screw pump to put the mud into the belt filter press....

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Abstract

The invention belongs to the field of sludge treatment, and particularly relates to a quick dewatering process for city watercourse sludge. The dewatering process for the city watercourse sludge includes putting the sludge into a stacking pool, stirring the sludge, adding polyanionic celluloses, performing initial dewatering, adding composite flocculants, stirring evenly, and deterring the sludge in a belt filter press to obtain dewatered sludge. The dewatering process has the advantages of simple operation, good dewatering effect and capability of improving water quality of sludge filter liquor and reducing environment pollution, is a low-cost environment-friendly sludge dewatering process and is beneficial to mass promotion and application.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a rapid dehydration process for urban river sludge. Background technique [0002] With the acceleration of the country's urbanization process, the backlog of river silt is becoming more and more serious. According to the data of Guangzhou Municipal Water Affairs Bureau, the silt storage capacity of rivers in Guangzhou is about 10 million m 3 Among them, there are more than 120 rivers that need to be treated urgently, with a length of about 388.52 kilometers, and the amount of river silt that needs to be treated is more than 7 million m 3 , the river muddy water environment has the following characteristics: the river network structure is criss-crossed, the siltation is serious, and the silt pollution is serious, the silt has a wide range of sources and complex components; the water quality is seriously polluted and the factors are complex. [0003] Sludge dewatering ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C02F11/12
CPCC02F11/122C02F11/14
Inventor 赖佑贤朱家立陈永喜闫晓满黄锦城
Owner 广州珞珈环境技术有限公司
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