A domestic wastewater treatment equipment

Abstract

The invention relates to the field of wastewater treatment and particularly relates to domestic wastewater treatment equipment. The domestic wastewater treatment equipment comprises a drainage pipeline network, a regulating reservoir, a coagulating basin, a separation cell, a biochemical reaction basin and a sludge dewatering house, wherein the coagulating basin comprises three reaction tanks; every two adjacent reaction tanks are communicated; brackets are erected above the reaction tanks; a stirring device is arranged on the brackets; the stirring device comprises a motor, a bearing block, astirring shaft, a stirring impeller and an auxiliary stirring sleeve; the auxiliary stirring sleeve is tapered; the bottom surface of the taper is downward; the auxiliary stirring sleeve is arrangedabove the stirring impeller in a sleeving manner and fixedly connected with the reaction tank; the stirring impeller comprises an impeller body and a plurality of main blades; the main blades are arranged above the impeller body in equal distance; the main blades are perpendicular to the impeller body and fixedly connected with the impeller body; the main blades are triangular; the upper inclinedplanes of the main blades are parallel to the conical surface of the auxiliary stirring sleeve and are close to one another. According to the structure of the coagulating basin, the reaction and oxidation effects of the coagulating basin are improved.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to domestic wastewater treatment equipment. Background technique [0002] Compared with industrial wastewater, domestic wastewater contains not only inorganic impurities, but also a large amount of organic impurities. Therefore, it is necessary to purify and remove both impurities in the process of domestic wastewater treatment. [0003] Such as figure 1 As shown, the existing domestic wastewater treatment equipment includes a drainage pipe network arranged in sequence, a regulating tank 1 for balancing water volume, a coagulation tank 2 for purifying inorganic substances, a separation tank 3 for solid-liquid separation, and a The biochemical reaction tank 4 for purifying organic matters and the sludge dewatering machine room 5 for dewatering solid isolates, the waste water passes through the drainage pipe network, regulating tank 1, coagulation tank 2, separation tank 3 and bio...

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Problems solved by technology

[0004] The disadvantage of the above-mentioned prior art is that the stirring structure in the coagulation tank 2 is a common stirring structure, which plays the role of fully stirring and mixing waste water, neutralizer and coagulant, and some reactions that require oxygen to participate Among them, if ferrous sulfate is used as the coagulant (ferrous ions need to be oxidized to achieve a better coagulation effect), it is difficult for the ordinary stirring structure to meet the requirements, and the coagulation effect in the coagulation tank 2 is will be reduced

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