Constructed wetland filling material cleaning device

Abstract

The invention relates to a constructed wetland filling material cleaning device. The constructed wetland filling material cleaning device comprises a cylinder arranged in an up-and-down penetrating mode, a feeding pipeline with an open bottom end is arranged on the front side of the cylinder, and a discharging pipeline with an open bottom end is arranged on the rear side of the cylinder. An annular water spraying device is arranged at the top end of the cylinder, a connecting cover is fixedly connected to the inner side of the water spraying device, a seal box is arranged on the top face of the connecting cover, a driving motor is arranged in the seal box, a rotating shaft of the driving motor passes through the connecting cover to be connected with a rotating blade arranged at the bottomof the cylinder, a screen body is arranged on the outer side of the rotating blade in a covering mode, and the screen body is connected with the cylinder through a plurality of connecting rods. The constructed wetland filling material cleaning device can ensure the cleaning effect and saves water resource; the inclined direction of a water spraying opening is opposite to the rotation direction ofthe rotating blade, so that the filling material mixed with water rotates in a certain direction under the impact of the water spraying opening, the rotating blade rotates to stir the water in the opposite direction, and two flow of water in different directions rush each other to flush the filling material.

Description

Technical field: [0001] The invention relates to an artificial wetland filler cleaning device. Background technique: [0002] Constructed wetlands in a broad sense refer to wetlands (such as dams, fish ponds, water features, rice fields, reservoirs, subsurface wetlands, etc.) artificially built by humans to meet the purposes of production, life, disaster prevention, and sewage treatment. It takes human interests as the main goal and social services as the main function. It can not only be used for sewage treatment, but also can be used to create landscapes and restore natural wetlands, so it can be called "functional artificial wetlands". Constructed wetlands in a narrow sense are sewage treatment systems in constructed wetlands. Constructed wetland sewage treatment system is an artificially constructed, controllable and artificial wetland system, which is designed and constructed to treat sewage through an optimized combination of physical, chemical and biological actions ...

AI Technical Summary

Problems solved by technology

Due to the limited gaps of the filler, after the long-term treatment of sewage in subsurface flow wetlands, the fillers are prone to clogging due to microbial death, plant root residues, etc., which eventually leads to a decline in the treatment capacity of the constructed wetland, sewage overflows from the surface of the bed, and the wetland eventually fails. Practice has shown , the clogging period of subsurface wetlands is generally 3-5 years

After the subsurface flow wetland is blocked, the bed packing needs to be cleaned. Because the general subsurface flow wetland uses gravel or gravel as the filler, the density is high, and because the impermeable membrane is often laid at the bottom of the wetland, the thickness of the filler is only about 1m, and the bearing capacity of the foundation is small. , it is difficult to use mechanical operations such as excavators. The realistic method for cleaning is to use manual excavation, two-wheel bucket truck transportation, and manual backfilling after the drum is cleaned. The whole process is time-consuming, labor-intensive and expensive.

[0005] At present, there are few studies on the cleaning of subsurface wetland fillers at home and abroad. Chinese patent CN2016201152059 (a filler cleaning device for constructed wetlands) discloses a device for cleaning fillers in artificial wetlands, which can clean the fillers without digging out the fillers. Cleaning is carried out, but continuous water discharge is required to maintain the water level in the constructed wetland. A large amount of clean water is required during the cleaning process, and the unwashed packing will cause secondary pollution to the cleaned packing during the cleaning process. cleaning effect cannot be guaranteed

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