JPH0713403U - Settling tank - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a precipitation tank that can be installed at extremely low cost by forming a uniform precipitation layer by stirring. A rotating substrate arranged on the settling tank, in which a stirrer S provided with a heavy stirring plate 2 tilted is loosely fitted on the vertical axis 6 at the center of the settling tank so as to be able to move up and down according to the resistance of the settling layer. The outer peripheral part of 3 and the outer peripheral part of the stirring plate 2 near the inner wall of the settling tank are connected by a chain 4, and motors 5 are provided at both ends of the rotary base 3 to mount the rotary base 3 on the side wall of the settling tank. It is rotatable, and the stock solution supply pipe 1 is located at the height of the center of the side wall of the settling tank.
The deflection member 1a is inclined and fixed to the opening so that the stock solution can be supplied to the inner wall surface side. The undiluted solution is supplied from the undiluted solution supply pipe 1 to the inner wall side by deflecting the undiluted solution supply direction by the deflecting member 1a, and the stirrer S is pulled and rotated by the driving of the motor 5, and the stirring plate 2 is rotated.
Makes the heavy mud sedimentary layer uniform, and the whole sedimented layer becomes a sedimented state of uniform concentration.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a settling tank (thickener).

[0002]

[Prior art]

 As shown in Fig. 3, the conventional settling tank has a center supply method in which the undiluted solution is dropped from the upper part of the center, so coarse heavy mud is deposited in the central part of the settling tank, and fine particles are relatively light. The light mud layer was in a state of settling around it. Even if it is agitated with stirring blades in this state, the circumference is simply leveled, and the heavy mud layer and light mud layer are rarely mixed and agitated. There was a problem with processing. In addition, in the center supply system, a bridge was installed above the settling tank, and the equipment for the stock solution pipes was complicated, resulting in high equipment costs.

In this respect, there is also a side supply configuration in which the stock solution pipe is simply connected to the side wall of the settling tank, but since the stock solution is supplied near the side wall and settles, an unreasonable force is applied to the stirring blade. There is a drawback that it is easy to be damaged, and therefore a strong stirring blade is required, which increases the equipment cost.

[0004]

[Problems to be solved by the device]

 Therefore, the present invention provides a sedimentation tank that can be installed at an extremely low cost while forming a uniform sedimentation layer by stirring.

[0005]

[Means for Solving the Problems]

 For this reason, the present invention makes it possible to rotate a rotary base body having a rotating motor on the outer peripheral portion to the upper end of the circumferential side wall, and to provide a rotary agitator in which a stirring plate is pulled and connected near the outer peripheral portion of the rotary base body. The settling tank is configured such that an undiluted solution supply pipe is open-connected to the side wall, and a deflection member that supplies undiluted solution to the inner wall surface is inclined at the connection end of the undiluted solution supply pipe in the opening.

[0006]

[Action]

 The stock solution is supplied from the stock solution supply pipe connected to the side wall to the inner peripheral side of the settling tank by the deflection plate, and the heavy mud sediment layer is agitated on the outer peripheral part of the rotary agitator and gradually moved to the central part. As a result, a uniform precipitation layer is formed as a whole.

At this time, the rotating agitator receives an unbalanced load on the heavy mud sediment layer, but since the rotation motor is connected to the outer peripheral portion of the agitator, the rotational torque of the outer peripheral portion is increased. Since it is large, there is no hindrance to the stirring of the heavy mud sediment layer, and it can be stirred smoothly.

[0008]

【Example】

 Hereinafter, details of the present invention will be described with reference to illustrated embodiments. First, in the settling tank shown in FIG. 1 and FIG. 2, S is a stirrer equipped with an inclined heavy stirring plate 2, which is loosely fitted to the central vertical axis 6 so that it can be moved up and down according to the resistance of the settling layer. It has become. A chain 4 connects the outer peripheral portion of the rotary substrate 3 placed on the settling tank and the outer peripheral portion of the stirring plate 2 near the inner wall of the settling tank.

Motors 5 are provided at both ends of the rotary substrate 3 so that the rotary substrate 3 can rotate on the side wall of the settling tank. Such a structure is the same as the structure of Japanese Utility Model Publication No. 59-21848 provided by the present inventor, in which the rotating base 3 is rotated by driving the motor 5 and the stirring body S is pulled and rotated by the chain 4.

The characteristic configuration of this example is that the stock solution supply pipe 1 is connected to the height of the center of the side wall of the settling tank, and the deflection member 1a is inclined so that the stock solution can be supplied to the inner wall surface side at the opening thereof. It is provided. In addition, 7 is an overflow pipe, 8 is a settling mud take-out pipe, 8a is an opening / closing valve, and 9 is a pump.

To explain the operation of this example, first, the stock solution is supplied from the side to the inside of the settling tank from the stock solution supply pipe 1. At this time, the supply direction of the stock solution is deflected by the deflecting member 1a to the inner wall side. It will be supplied. As a result, as shown in Fig. 2, coarse-grained heavy mud is deposited near the inner wall, and fine-grained relatively light mud is settled toward the center.

Then, the rotation base 3 is rotated by the drive of the motor 5, whereby the stirring body S is pulled and rotated, and the stirring plate 2 stirs them. At this time, first, the heavy mud sediment layer immediately after the stirring plate 2 at the outer peripheral position is supplied is leveled, and the leveled heavy mud layer gradually moves in the circumferential direction as shown in FIG. It enters the central direction and is mixed with the light mud layer. Therefore, the entire sediment layer is in a sediment state with a uniform concentration.

The stirrer S is subject to a large unbalanced load due to the heavy mud deposit layer. However, due to the connection of the chain 4 at the outer peripheral portion of the stirrer S and the outer peripheral arrangement of the rotation motor, the outer periphery of the stirrer S is reduced. Since the rotating torque of the part can be increased, there is no problem in stirring the heavy mud sedimentary layer.

According to the experiment, even if the half horsepower motor 5 of the motor A of the central rotary stirring body shown in FIG. 3 is used, the rotation torque at the outer peripheral portion can be increased by 10 times, and the stirring of the heavy mud sedimentary layer can be performed. Was able to operate smoothly.

As described above, according to this example, the undiluted solution can be supplied to the inner wall side, and the heavy mud layer deposited on the inner wall side due to the supply is gradually moved to the whole by the stirrer and the uniform sedimentation is achieved. The condition can be obtained, and since the stock solution is side-supplied, it can be installed easily and inexpensively.

Although this example is configured as described above, the present invention is not limited to this. For example, it suffices that the stock solution can be supplied from the side of the settling tank, regardless of the structure of the stock solution supply pipe and the means of connection with the settling tank. The number of stock solution supply pipes is also appropriate, and another stock solution supply pipe 10 may be provided at the facing position as shown by the phantom line in FIG.

Further, the shape and number of the deflecting members or the fixing structure thereof are not limited. Further, the configuration of the rotary stirring body is optional, but it is necessary to equip the motor at a portion near the side wall of the settling tank and to pull and connect the stirring body to increase the rotation torque at a portion near the inner wall.

[0018]

[Effect of device]

 According to the present invention, the side supply structure of the undiluted solution makes it possible to easily and inexpensively install, and the undiluted solution can be supplied to the inner wall side by the deflecting member, and the heavy mud layer accumulated there is gradually moved to the whole by the agitator. It has a great effect of causing uniform precipitation.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a schematic plan view thereof.

FIG. 3 is a vertical sectional view of a conventional settling tank.

[Explanation of symbols]

 1 undiluted solution supply pipe 1a deflection member S stirrer 2 stirrer plate 3 rotating substrate 4 chain 5 motor

Claims (1)

[Scope of utility model registration request] 1. A rotary stirrer having a rotating motor arranged on the outer peripheral portion thereof, which is rotatable on the upper end of the circumferential side wall, and is provided with a rotary stirrer in which a stirring plate is pulled and connected near the outer peripheral portion of the rotary baser. A settling tank, wherein a stock solution supply pipe is connected to the opening, and a deflection member for supplying the stock solution to the inner wall surface side is inclined at the connection end of the stock solution supply pipe at the opening.