Settling separation device and method

Abstract

The invention provides a settling separation device which comprises a vertical tank body. A water inlet and a sewage outlet are arranged at the lower part of the tank body, and a water outlet is arranged at middle part of the tank body; a drug mixer with a drug feeding hole is also arranged at the lower part of the tank body; a filtering device which is connected with the water outlet is arranged at the downstream of the drug mixer; reactors are arranged at the downstream of the drug mixer and the upstream of the filtering device, wherein each reactor comprises a conical section which expands the diameter upwards along the vertical axial line of the tank body and a pipe section which is communicated with the lower end of the conical section and extends downwards, the upper end of the conical section is opened, the lower end of the pipe section is closed, and a tangential inlet is arranged on the lower side wall of the pipe section and is communicated with the drug mixer through a connecting pipe; and the filtering device is arranged below the opened upper end of the reactor and is arranged at intervals around the reactors, wherein a part of the filtering device near the conical section is provided with an inclined filter surface so as to receive a water flow from the opened upper end of the reactor. In addition, the invention also provides a method for treating wastewater.

Description

technical field [0001] The invention relates to a device and method for sewage treatment, in particular to a sedimentation separation device and method for solid-liquid separation. Background technique [0002] For solid-liquid separation in the field of sewage treatment, such as water supply treatment, secondary treatment of sewage, and separation of micro-liquid or colloid, in order to improve the separation effect, the method of adding flocculant to stir and mix, and flocculation and sedimentation is generally adopted. But usually, dosing mixing, flocculation, and sedimentation are carried out in the dosing stirring tank, flocculation tank, and sedimentation tank respectively. The disadvantages of this equipment are single function, large floor space, and high operating costs. [0003] The gravity sedimentation separation equipment used in the prior art needs to ensure that the sewage with a certain amount of incoming water has a certain residence time after the dosing re...

AI Technical Summary

Problems solved by technology

With the use of a sedimentation separation device with full filtration, as time increases, the dirt accumulated on the filter membrane will also increase, resulting in an increase in filtration resistance and a decrease in separation efficiency.

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