Double-tube electrolytic dephosphorization device

Abstract

The invention discloses a double-tube electrolytic dephosphorization device, which comprises a water inlet, a water outlet, a filter pipe and at least two metal sleeves which are vertically arranged and are sequentially connected in series. Each metal sleeve comprises a water inlet tee joint, a water outlet tee joint, a metal outer pipe, a metal inner pipe, a concentric reducer and a precipitationpipe. Ports of the water inlet tee joint are respectively communicated with the water inlet, the bottom end of the metal outer pipe and the top end of the precipitation pipe; ports of the water outlet tee joint are respectively connected with the top end of the metal outer pipe, the bottom end of the concentric reducer and the water inlet tee joint of the next metal sleeve; the top end of the metal inner pipe is sleeved in the concentric reducer, and the bottom end of the metal inner pipe is arranged at the bottom end of the precipitation pipe; a filter element is arranged in the filter pipe;the water outlet is arranged at the top end of the filter pipe; the metal outer pipe is connected with a power anode; and the metal inner pipe is connected with a power cathode. The device has the advantages of simple and feasible structure, low manufacturing cost, convenience in use and maintenance and good electrolysis effect.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an electrolytic dephosphorization device. Background technique [0002] In recent years, the country has paid more and more attention to the ecological environment. Compared with urban sewage, rural domestic sewage, aquaculture wastewater or some small sewage treatment projects not connected to the pipe network have the characteristics of higher total phosphorus. Therefore, traditional sewage treatment equipment It is difficult to treat excessively high total phosphorus to meet the discharge standard only by using microbial methods. Substandard discharge of phosphorus in sewage will lead to eutrophication of the water body and seriously affect the ecological environment. [0003] Electrolytic phosphorus removal is a more effective phosphorus removal method besides the biological method. It uses the principle of electrolysis, uses iron or aluminum electrodes for the anod...

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Problems solved by technology

The main problem faced by the electrolytic dephosphorization device in the prior art is that the scum and sediment generated during the electrolysis process are difficult to remove, which affects the quality of the effluent water in the water, and the precipitation and oxides attached to the electrode surface will also hinder the release of metal ions. Sustained release, affecting the electrolytic effect of the electrode

In order to solve the above problems, in the prior art, an ultrasonic method is used to remove oxides on the electrode surface, but a set of ultrasonic system must be added, and the production cost is high; there is also a cathode-anode switching method to alleviate the passivation problem of the anode, but the same It is necessary to add timing converter and other equipment, the cost is also high, and the problem of anode passivation cannot be completely solved

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