Decentralized type rapid dewatering and residual water purification system and method for river bottom mud

Abstract

The invention discloses a decentralized type rapid dewatering and residual water purification system and method for river bottom mud. The system comprises coagulation chemical feeding equipment, a pipeline mixer, soil engineering tube bags, a dewatering field, a residual water adjusting tank and an integrated sewage treatment unit. Conditioning of dredging bottom mud by a coagulant is realized through the pipeline mixer, then, the bottom mud is pumped into the soil engineering tube bags and rapidly dewatered by the aid of the water permeable and mud non-permeable characteristics of the soil engineering tube bags, and produced residual water enters the adjusting tank through drain pipes arranged in the dewatering field and enters the integrated sewage treatment unit for purification treatment after being conditioned. As for the decentralized river dredging engineering, rapid dewatering and residual water purification of river dredging bottom mud with different properties are realized through flexible combination of the soil engineering tube bags and an integrated sewage treatment system.

Description

technical field [0001] The invention belongs to the field of river channel dredging, and in particular relates to the dehydration of dredged sediment and the purification treatment of residual water for distributed channels. Background technique [0002] The main causes of river pollution include: ① incomplete interception of sewage; ② stacking and dumping of garbage, and ③ pollution from agriculture, animal husbandry and fishery. Among them, the incomplete interception of sewage is the main reason for serious river pollution. my country is in the stage of rapid urbanization development, resulting in insufficient comprehensive planning of sewage interception and management projects; on the other hand, some polluting enterprises have wastewater treatment that is not up to standard discharge or even sneaky and leaky discharge, which have caused river ecological pollution. deterioration of the environment. [0003] River dredging can be divided into engineering dredging and en...

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Problems solved by technology

[0007] At present, there are many domestic patents on the dehydration of river dredging sediment and the wastewater generated by dehydration. For example, the patent number is CN104140190A, and the patent name is "Mobile river and lake dredging and dredging sludge treatment method and device". The filter realizes the dehydration of the dredging and dredging sediment of rivers and lakes, and dewaters the sediment of different river sections through the movement of the van diaphragm filter press equipment. The disadvantages: on the one hand, the van diaphragm filter press equipment The size and weight are relatively large, and the installation and configuration of the equipment are relatively complicated, which makes the movement of the equipment more complicated and difficult; on the other hand, this method does not treat the wastewater generated during the sediment dehydration process and directly discharges it into the water body, which is not conducive to the improvement of water quality

The patent number is CN102603151A, and the patent name is "A Method for Strengthening Geotube Bag Sludge Dewatering", which achieves efficient dehydration of sludge from sewage treatment plants through the combination of sludge flocculation, electroosmosis and geotube bag dehydration. However, the sludge electroosmotic dehydration technology still has some deficiencies in practical application, such as corrosion of anode materials, high power consumption, and unstable operation of the system.

The patent number is CN102583950A, and the patent name is "a mobile polluted sediment pipe bag dehydration treatment method". The polluted sediment in the river course or reservoir is transported to the mixer by an environmental dredging ship or a mud pump and mixed with a flocculant, and then It enters the geotechnical pipe bag for dehydration, but does not involve the purification treatment of the wastewater generated by the dehydration of the sediment

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