Variable flow constructed wetland provided with winter temperature maintaining and raising device

Abstract

The invention discloses a winter temperature maintaining and raising device for a constructed wetland. The main structure of the device is that: three sections of fillers are vertically and parallelly filled in the constructed wetland, the tops of the three sections of fillers are provided with a water distribution pipe, the bottoms of the three sections of fillers are provided with a water receiving pipe, and a water outlet of the water receiving pipe and the tops of the fillers are at the same height; the upper part of one end of the three sections of fillers is connected with a water inletpipe, the lower part of the other end of the three sections of fillers is connected with a water outlet pipe, and a water outlet of the water outlet pipe and the tops of the fillers are at the same height; the water distribution pipe and the water inlet pipe are connected to a high-position water tank respectively; when water flows into the water distribution pipe, the water is discharged from the water outlet of the water receiving pipe, and the water inlet pipe and the water outlet pipe are closed; and when the water flows into the water inlet pipe, the water is discharged from the water outlet of the water outlet pipe, and the water distribution pipe and the water receiving pipe are closed. A guardrail at the periphery of the constructed wetland is double walls, and organic matter for fermenting to produce heat is filled inside the double walls. The temperature of the wetland is maintained and raised by the heat produced by microbial metabolism in a double wall structure; and the disadvantages that the content of dissolved oxygen of influent of a horizontal flow wetland is low in summer and a vertical flow wetland is high in heat loss in winter are overcome.

Description

technical field [0001] The invention relates to a heat preservation device, in particular to a variable flow artificial wetland provided with a winter heat preservation and temperature increasing device. Background technique [0002] As a cost-effective and ecological sewage treatment technology, constructed wetlands are more and more widely used. After nearly 50 years of development, there are currently more than 10,000 constructed wetlands in the United States and more than 800 constructed wetlands in Denmark for sewage treatment. However, constructed wetlands are greatly affected by factors such as seasons and temperature. The removal rate of pollutants in low temperature winters is lower than that in high temperature seasons, especially N, P and other pollutants, which affects their popularization and use in low temperature areas in winter. In recent years, scholars at home and abroad have carried out research on the thermal insulation of constructed wetlands in low tem...

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