JP4073662B2 - Stirrer in sewage treatment tank - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stirring device in a sewage treatment tank.
[0002]
[Prior art and its problems]
In a reaction tank that performs sewage treatment, scum is generated in the stirring treatment step, and floats on the water surface to form a layer. And since a support | carrier is supplemented by the layer of scum and stirring is inhibited, the processing efficiency of sewage falls.
[0003]
Conventionally, as a countermeasure, a scum is removed by a shower-type defoaming device S1 as illustrated in FIG. 3, or a scum is sucked out by a pump S2 floated as illustrated in FIG. In addition, it is necessary to separately install a dedicated device, and it is necessary to secure an installation space for that purpose, and it also increases the initial cost and running cost.
[0004]
OBJECT OF THE INVENTION
The object of the present invention is that it is not necessary to separately install a scum removing device, and the stirrer itself has a function of preventing scum accumulation, so that efficient sewage treatment can be performed at low cost by circulating the carrier efficiently. An object of the present invention is to provide a stirring device in a sewage treatment tank.
[0005]
[Structure of the invention]
In the stirrer in the sewage treatment tank according to the present invention, the outer side of the agitator motor, in which the propeller is fitted to the rotating shaft of the submersible motor, is pivotally supported by a gantry in the sewage treatment tank, and the pivot is used as a fulcrum. A mechanism to turn the stirrer up and down by rotating operation is provided, so that when the stirrer recoils downward, a downward water flow is generated for stirring in the sewage treatment tank, and when reversing upward, an upward water flow is generated for scum diffusion on the water surface. Configured.
[0006]
[Action]
When the underwater motor is driven when the agitator is in the downward state, a downward water flow is generated by the rotation of the propeller and the inside of the sewage treatment tank is agitated.When the underwater motor is driven in the state where the agitator is inverted upward, the propeller The upward water flow is generated by the rotation, and the scum diffusion action on the water surface is generated, so that the carrier is easily circulated. Then, after the scum is diffused and the stirrer is reversed again to the downward state, the inside of the sewage treatment tank is stirred by the generation of the downward water flow by the propeller. Thus, by alternately generating the upward water flow and the downward water flow, the carrier is efficiently circulated and an effective sewage treatment is performed.
[0007]
【Example】
The embodiment will be described below with reference to FIGS.
[0008]
1 is a guide pipe standing in the sewage treatment tank, 2 is a frame that can be moved up and down by engaging with the guide pipe 1 by means of engagement elements 3. A stirrer that is attached to a mechanism, for example, operating the rod 8 by pivoting the outside of the motor part to the gantry 4 by, for example, a pin contact structure, and reversing the stirrer 4 180 degrees in the vertical direction with the pivotal part 7 as a fulcrum. The holding posture of the stirrer 4 is changed upward or downward by the crank motion of the linkage 9 by the above.
[0009]
When the submersible motor 5 is driven in a state in which the rod 8 is moved downward and the stirrer 4 is held downward by the crank motion of the linkage 9 as shown in FIG. 1, the propeller 6 rotates to generate a downward water flow. Stir the inside of the treatment tank. In the state where the rod 8 is lifted and the holding posture of the stirrer 4 is reversed upward by the crank motion of the linkage 9 as shown in FIG. 2, an upward water flow is generated, causing a scum diffusion action on the water surface, and the carrier circulates. It will be easy to do. Then, after the scum is diffused, the rod 8 is lowered again to reverse the holding position of the stirrer 4 as shown in FIG. 1, and the inside of the sewage treatment tank is stirred by the generation of the downward water flow. In this way, effective sewage treatment is performed by efficiently circulating the carrier by alternately generating upward and downward water flows, but the above rod operation is performed manually by visually checking the state on the water surface. Alternatively, it may be performed intermittently by automatic operation.
[0010]
【The invention's effect】
According to the stirrer in the sewage treatment tank of the present invention, the stirrer itself has a function of preventing scum accumulation, and effective sewage treatment is performed by efficiently circulating the carrier. There is an advantage that the initial cost and the running cost can be remarkably reduced without the need to separately install the equipment.
[Brief description of the drawings]
FIG. 1 is an explanatory view illustrating an operation mode of a stirrer in a sewage treatment tank according to the present invention, showing a state in which a stirrer is held in a downward posture.
FIG. 2 is an explanatory view illustrating the operation mode of the stirring device in the sewage treatment tank according to the present invention, and shows a state in which the stirrer is held in an upward posture.
FIG. 3 is an explanatory view exemplifying an installation mode of a stirrer in a conventional sewage treatment tank, and shows an example in which a shower-type defoaming device is additionally provided.
FIG. 4 is an explanatory view exemplifying a conventional installation mode of a stirring device in a sewage treatment tank, and shows an example in which a scum suction device using a floating pump is additionally provided.
[Explanation of symbols]
2 frame 4 stirrer 5 submersible motor 6 propeller 7 pivot

Claims (1)

A mechanism in which a propeller is fitted to the rotating shaft of a submersible motor and the outside of the agitator motor is pivotally supported by a frame in the sewage treatment tank, and the agitator is turned upside down by a rotation operation with the pivot as a fulcrum. In the sewage treatment tank, a downward water flow is generated for stirring in the sewage treatment tank when the agitator is turned downward, and an upward flow is generated for scum diffusion on the water surface when turning upward. Stirring device.

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