A filter and purification device for farmland first-stage backwater water quality

Abstract

The present invention is a first-stage receding water quality percolation and purification device for farmland, the structure of which includes a fixed support, a percolation purification box, a drainage baffle, a nano purification net, a water blocking block, a nanocomposite material, and a fixed bottom plate; wherein, the fixed support It is fixedly installed at the drainage outlet of the farmland. There are three rows of grooves corresponding to the two sides of the bracket, which are respectively the purification net installation groove, the baffle installation groove and the purification box installation groove. The nano purification net, the drainage baffle and the percolation purification are installed in sequence When installing, ensure that the installation groove of the purification net is on the side of the farmland drainage and water supply; during the non-drainage period of the farmland, insert the drainage baffle, and the water body pollutants near the outlet can be degraded and removed by the nano purification net; when the farmland is draining, remove the drainage baffle According to the requirements of the field water level, a water-blocking block is installed in the installation tank of the purification box, and then several infiltration purification boxes are stacked to form a row of infiltration walls; the infiltration purification box is openable, which is convenient for the renewal of nano-composite materials Recycle.

Description

Technical field[0001]The invention relates to a farmland first-stage return water quality percolation purification device, which belongs to the technical field of farmland non-point source pollution control.Background technique[0002]Under the agricultural development model centered on "increasing production and income", a large number of pesticides and fertilizers are used in agricultural production in my country. Generally, only 10%-20% of the pesticides sprayed are attached to the crops, while the absorption rate of the applied fertilizers is only 30%. %about. For those chemical fertilizers and pesticides that are not used by crops, a considerable part of them flows into the surface water body with the return of water from the irrigated farmland or the runoff after the rain, which has become the main reason for the deterioration of the water quality of rivers and lakes.[0003]The concentration of pollutants in the first-level drainage ditch of farmland is high. The first-level puri...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a first-stage receding water quality percolation and purification device for farmland. The purpose of the device is to solve the pollution problem of the first-stage receding water in farmland by installing a percolation and purification device at the first-stage drain to construct an ecologically clean sewage drain. Utilize the photocatalytic performance of the nanocomposite material filled in the device to efficiently remove nitrogen, phosphorus, pesticides and other pollutants in the first stage of the farmland backwater

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