River-lake pollution bottom mud in-situ quantity reduction pollution cleaning device based on pore water guide discharging

Abstract

The invention provides a river and lake pollution bottom mud in-situ quantity reduction pollution cleaning device based on pore water guide discharging. The device comprises a direct current voltage stabilizing power supply, a peristaltic pump and electric dewatering pollution cleaning electrodes, wherein the two electric dewatering pollution cleaning electrodes are in relatively parallel arrangement and are inserted into bottom mud; each electric dewatering pollution cleaning electrode comprises a water guide electrode plate, porous organic glass plates arranged at the two sides of the waterguide electrode plate, a filtering screen arranged at the outer side of the porous organic glass plate, and an upper water covering isolation cover covering the water guide electrode plate; a verticalwater guide groove and a metal conducting wire connected with the direct current voltage stabilizing power supply are arranged on each water guide electrode plate; the bottom of each water guide electrode plate is provided with a pore water storage device communicating with the corresponding water guide groove; each pore water storage device is connected with a pore water outwards discharging guide pipe which is connected with the peristaltic pump. The lake pollution bottom mud in-situ quantity reduction pollution cleaning device has the advantages that the field work capability is high; thein-situ separation and removal effect of bottom mud pollutants is good; the power consumption is low; the operation cost is low; the maintenance is simple; no chemical agent pollution and no solid waste are generated; the influence on the river and lake demersal ecological environment is small.

Description

technical field [0001] The invention relates to the fields of water resource protection and water environment treatment, in particular to an in-situ reduction and decontamination device for river and lake polluted sediment based on pore water guidance and drainage. Background technique [0002] Sediment is an important reservoir of pollutants in rivers and lakes and an important part of aquatic ecosystems, and plays a vital role in regulating material cycles and ecological processes and services. Under the condition that the input of exogenous pollution is gradually controlled, how to effectively control the release of endogenous pollution in sediment has become the fundamental premise of lake water environment management, water ecosystem restoration and biodiversity protection, and is also the current ecological civilization construction and the comprehensive implementation of the river chief system. Realistic problems that must be faced. [0003] The bottom mud on the sur...

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Problems solved by technology

[0005] The inventor found through research in the process of realizing the present invention: the existing river and lake bottom mud in-situ repair device or technology based on pore water drainage has relatively large deficiencies: (1) focus on suppressing pores by dredging or in-situ covering release of water pollution instead of directly separating and removing pore water from the sediment medium as a pollution source, so the total amount of endogenous pollution is reduced; (2) develop a pore water sampler with a screen and a ceramic head, although it can Separation of pore water, but the amount is small, the efficiency is low, and does not involve the separation and removal of sediment pollutants; (3) EKG electrodes can remove the pore water of farmland soil without overlying water, but the EKG electrodes directly contact the soil, and the electrodes The water guide channel is easily blocked by soil particles, and the insertion and removal of the EKG protection plate is cumbersome, which affects the waterproof and sealing performance of the device. In addition, the device does not consider the intrusion of the overlying water from the bottom mud and avoid the exchange of overlying water and pore water.

[0006] In summary, the rapid and effective separation and removal of endogenous pollutants is the technical bottleneck of river and lake contaminated sediment remediation

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