Clear slurry dewatering and solidifying integrated treatment method

Abstract

The invention relates to an integrated treatment method for dewatering and solidifying clear slurry, which comprises the following steps: conveying slurry in river, sea and lake ponds to a settling pond through a dredging pump, a slurry pump and a pipeline and flowing into a slurry storage pond after the slurry is filtered by a combined grid device; conveying the slurry with 80 percent of moisture content in the slurry storage pond to a slurry compounding pond by using the pump, adding inorganic macromolecule conditioning agents of 0.01 kilogram (35 percent of polymeric ferric silicate sulfate PFSS plus 65 percent of poly aluminum chloride PAC) in the slurry per cube to condition and then adding FSA flocculating-settling agents of 0.05 kilograms in the slurry per cub to condition again; adding HEC high-strength high-water resistant soil body consolidating agents of 5-20 kilograms in the slurry per cube and uniformly mixing; pressing the slurry after being treated in above steps into slurry consolidating soil by using a filter press, discharging clear water and obtaining a mud cake with 30 percent or below moisture content as engineering soil. The slurry has a certain self-hardening capacity after being dewatered and solidified, the formed consolidated soil has the air permeability and the bearing capacity, and the PH value thereof is equivalent to that of common soil, so that the rationalization, the resource, innocuous disposal and the economic treatment of the slurry are really realized.

Description

technical field [0001] The invention relates to the field of environmental ecological restoration and resource recycling of polluted waste, in particular to an integrated treatment method for desilting and consolidating river, sea and lake reservoir dredging mud in the field of water conservancy engineering or environmental engineering. Background technique [0002] Entering the 21st century, my country's water conservancy is facing three major problems: aggravated flood disasters, shortage of water resources and deterioration of the water ecological environment. The severe siltation of rivers, seas, lakes and reservoirs caused poor flood drainage and water quality deterioration are the three major problems. One of the important reasons. Dredging the river, sea and lake reservoirs, controlling and optimizing the environmental quality around the river, sea and lake reservoirs is an important measure to promote the sustainable development of the national economy, especially to ...

AI Technical Summary

Problems solved by technology

However, the sludge containing harmful impurities and toxic substances cannot be directly sent to the field;

[0006] 3. The mud-for-soil brick-making method is only applicable to those silts with better composition and performance;

[0008] Apparently, the above-mentioned traditional sludge treatment methods basically have no high technology at all. In fact, high economic investment is used to compensate for the backwardness of its technology, so as to achieve the treatment goal of low benefit, low level and low requirement.

These traditional methods with outdated technology and poor economic benefits are still being used in most river, sea, lake and reservoir dredging places across the country

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