Pipeline sludge solidification treatment method

A technology for solidification treatment and sludge, which is used in dewatering/drying/concentrating sludge treatment, solid waste management, sustainable waste treatment, etc. The effect of reducing environmental pollution

Inactive Publication Date: 2006-09-13
SOUTHEAST UNIV
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Problems solved by technology

The solidification cost of this kind of sludge is more than 200 yuan per cubic meter, and this process is not suitable for my country's national conditions

Method used

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  • Pipeline sludge solidification treatment method
  • Pipeline sludge solidification treatment method
  • Pipeline sludge solidification treatment method

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Embodiment Construction

[0020] A certain sea area near the Minjiang Estuary in Fujian needs to be filled with land for land reclamation, and it is planned to adopt the method of pipeline silt solidification for land reclamation. The marine silt in this sea area has a water content of 105% and a bulk density of 1.5 tons / m 3 , the project requires the strength of the solidified sludge to reach 200kPa at the age of 90 days.

[0021] 1) The unconfined compressive strength, q u The coefficient k in the relational expression with the total water-cement ratio W / C 1 and k 2 are 50 and 0.8 respectively, so it can be deduced that when the design strength requirements are met, the total water-cement ratio W / C is 5.6. It is determined that when the water content of the mixture is 150%, its fluidity is very good, so the target water content is 150%. Therefore, the cement to be added per cubic meter of sludge is 1700*1.5 / 2.5 / 5.6=182kg.

[0022] 2) Pass the dredged silt through a 1cm sieve to remove boulders, ...

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Abstract

A pipeline delivering method for treating and solidifying the sludge to obtain a building filler includes such steps as indoor solidifying experiment of the sludge to be solidified to determining the relation between its compression strength and total water/cement ratio, sieving the dredged sludge by 1-cm sieve, measuring its content of water, filling cement slurry in pipeline while regulating its water/cement ratio, and using high-pressure air to mix the cement slurry with said sludge and drive the mixture to flow to obtain the solidified sludge.

Description

technical field [0001] The invention relates to a sludge solidification method, which is suitable for the treatment of dredging fill sludge and belongs to the technical field of foundation treatment. Background technique [0002] With the rapid development of my country's economy, construction projects such as port engineering, waterway engineering, and water conservancy engineering have increased rapidly. In the dredging process of various waterways and in the construction and expansion of ports, a large amount of dredged soil is usually produced. According to incomplete statistics, the discarded dredged silt in my country reaches 100 million m3 every year. 3 Above, the engineering quantity of dredging silt treatment is very considerable. Currently, there are two methods of silt treatment that are often used. One is to throw the silt into the sea, and the other is to fill the land with cofferdams near the shore. The main problem of sludge disposal is that the existing dum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14C04B18/30
CPCY02W30/91
Inventor 洪振舜邓永锋沈水龙
Owner SOUTHEAST UNIV
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