Movable type method and device for treatment on desilting and dredging sludge of rivers and lakes

Abstract

The invention discloses a movable type method and device for treatment on desilting and dredging sludge of rivers and lakes. The method comprises the following steps: A, storing sludge inside a temporary cofferdam sludge storage pond which is constructed on the shore of a river or lake; B, hoisting a container in which a sludge dehydration system is integrally mounted to the side of the sludge storage pond; C, pumping sludge into a compartment type film filter press for filter-press dehydration in the sludge dehydration system from the sludge storage pond; D, squeezing by using a squeezing pump; E, transferring the sludge of which the water content is greatly reduced, for later recycling treatment. The device comprises the cofferdam sludge storage pond, the sludge dehydration system and the container for carrying the sludge dehydration system. By adopting the method and device, the water content of sludge can be reduced to be about 40%, then the sludge is transformed into solid without flowing, no pollution is caused in the transformation process, the transferring is flexible, the use is convenient, the circulation use efficiency of equipment is high, and later recycling treatment is facilitated.

Description

technical field [0001] The invention relates to a method and a device for treating river and lake dredging sludge. Background technique [0002] Sediment is an important part of the ecology of the water environment. Due to improper sewage discharge, a large amount of sewage is discharged into the natural water body, resulting in the deterioration of water quality and the pollution of the sediment. There is a dynamic balance of absorption and release between the water body and the sediment. When the water body When there is serious pollution, some pollutants can enter the bottom mud through sedimentation and adsorption to form polluted sludge; when the pollution caused by external sources is controlled, the release of pollutants in these sludge may cause the water body to regenerate. pollute. [0003] Sediment pollution has become a worldwide environmental problem, and the sediments of ports, lakes, and rivers in many European and American countries have been polluted. The ...

AI Technical Summary

Problems solved by technology

River and lake sludge also contains a large number of pathogenic bacteria, parasites (eggs), heavy metals such as copper, aluminum, zinc, chromium, mercury, and refractory toxic and harmful substances such as polychlorinated biphenyls, dioxins, and radioactive elements. Use direct composting to treat river and lake sludge, and the toxic and harmful substances in it can easily cause soil pollution

After the polluted river and lake sludge is dredged, a large amount of raw mud will be produced. The moisture content of these muds is between 98% and 85%, which is huge and difficult to transport.

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