JP2006320788A - Stirring machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stirring machine performing stirring in a stirring tank by lifting a stirring body in the stirring tank by varying specific gravity and by a jet stream of a discharge liquid from the stirring body at floating up of the stirring body, and preventing a sludge from being precipitated and deposited on an inner bottom part of the stirring tank. <P>SOLUTION: In the stirring machine lifting in a stirring fluid W in the stirring tank 1 by own variation of specific gravity, a plurality of nozzles 3 for jetting the discharge liquid from the stirring body 2 when it is floated up in the stirring fluid W in the stirring tank 1 are projectedly provided on an outer peripheral part of the stirring body 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a stirrer, and in particular, the agitator is moved up and down in the agitation tank by changing the specific gravity of the agitator, and the agitation in the agitation tank is carried out by a jet of discharged liquid from the agitator when the agitator floats. The present invention relates to a stirrer that performs and prevents sedimentation of solids such as sludge at the inner bottom of a stirring tank.

  Conventionally, when treating a fluid such as sewage containing solid impurities such as earth and sand and sludge in sewage treatment and construction wastewater treatment, for example, when treating sludge water, this sludge water (hereinafter referred to as “stir fluid W )) Is mixed with a chemical such as an aggregating agent and a bactericidal agent, and the mixture is put into a stirring tank and stirred by a stirrer to perform necessary agglomeration and sterilizing treatments.

  By the way, the stirrer circulates the stirring fluid in the tank using the water flow generated by rotating the stirring blade through a driving body such as a motor by obtaining energy from the outside, for example, a commercial power source. The entire tank is forcibly stirred.

For this reason, since the stirring power in this stirrer is large, commercial power is supplied from the outside, so that the power cost increases, and in a deep tank, the power cost further increases and the running cost increases. Furthermore, there is a problem that the stirrer cannot be used in a place where there is no commercial power.
In addition, since the stirring blade is disposed at the center of the stirring body that moves up and down, the stirring force at the inner bottom of the tank becomes weak during the slow stirring of the stirring fluid in the tank, and the specific gravity is relatively heavy. There was a problem that solid sludge and the like settled and deposited on the fixed part in the tank.

  In view of the problems of the conventional stirrer, the present invention raises and lowers the stirrer in the stirrer by changing the specific gravity, and the jet of discharged liquid from the stirrer floats when the stirrer floats. An object of the present invention is to provide a stirrer that prevents the sludge from being deposited on the inner bottom of a stirring tank.

  In order to achieve the above object, the stirrer of the present invention is a stirrer in which the stirring fluid in the stirring tank is moved up and down by its own specific gravity change, and is stirred when rising in the stirring fluid in the stirring tank. A plurality of nozzles configured to eject liquid discharged from the body are provided so as to protrude from the outer peripheral portion of the stirring body.

  In this case, the stirrer can be configured as a tank that can supply and discharge fluid to the inside, and can be configured to be guided up and down by a guide rod that penetrates the stirrer.

  Further, the nozzle protruding from the stirring body can be arranged at the lower outer peripheral position of the stirring body so as to be directed radially or obliquely downward.

  In addition, a stirring blade for rotation driving that rotates the stirring body with the fluid resistance of the stirring fluid received when the stirring body is raised and lowered can be configured to protrude from the upper outer periphery of the stirring body.

  According to the stirrer of the present invention, the stirrer is configured to move up and down in the stirring fluid in the stirring tank by its own specific gravity change, and the liquid discharged from the stirring body when rising in the stirring fluid in the stirring tank Since the plurality of nozzles configured to jet the nozzle are configured to protrude from the outer peripheral portion of the stirring body, the stirring liquid in the stirring tank is stirred by the jet of the discharged liquid discharged from the stirring body. Stirring with small energy is possible.

  In addition, the agitator has a tank shape that allows fluid to be supplied to and discharged from the inside, and the specific gravity change for raising and lowering the agitator is agitated by being guided by a guide rod that passes through the agitator. This can be done by a simple method of supplying and draining fluid.

  In addition, by disposing the nozzle protruding from the stirring body at the lower outer peripheral position of the stirring body so as to be directed in a radial direction or obliquely downward, a jet of discharged liquid discharged from the stirring body causes the inside of the stirring tank. Since the agitation is performed and the vicinity of the inner bottom of the tank is also performed, it is possible to prevent sludge from being deposited on the inner bottom of the tank.

  In addition, the specific gravity can be changed by projecting a stirring blade for rotation driving that rotates the stirring body with the fluid resistance of the stirring fluid received when the stirring body is raised and lowered on the upper outer periphery of the stirring body. When the stirrer moves up and down, the stirrer rotates due to the fluid resistance of the stirrer fluid to the stirrer blade. Can be done.

  Hereinafter, embodiments of the stirrer of the present invention will be described with reference to the drawings.

  1 to 2 show a first embodiment of a stirrer according to the present invention.

  In general, when processing agitation fluid W such as sludge water containing solid impurities such as earth and sand and sludge in the treatment of sewage treatment and construction wastewater, coagulant and sterilization are provided in the agitation tank to which the agitation fluid W is supplied. An agent such as an agent is charged and the agitator A disposed in the agitation tank is driven to agitate the agitation fluid W to perform necessary treatments such as aggregation and sterilization.

  The stirrer A disposed in the stirring tank 1 is guided to a guide rod disposed in the stirring tank 1 so as to be substantially perpendicular to the central portion in the stirring tank 1 and changes the specific gravity inside. The cylindrical tank-shaped stirrer 2 that is configured to move up and down by itself, and the outer periphery of the stirrer 2, preferably projecting radially outward from the lower outer periphery, are mixed with the stirring fluid from the stirrer A plurality of nozzles 3 are configured to discharge and inject W.

  As shown in FIG. 2, the stirrer 2 is formed so that a through hole 21 is formed in the central portion of the stirrer body, and the guide rod 5 is penetrated into the through hole 21. The guide rod 5 restrains the stirring body 2 from moving in a direction other than the vertical direction (up and down direction) and the rotation direction. The guide rod 5 is suspended and erected by a guide rod support 6 disposed on the upper portion of the stirring tank 1. Support by such a method.

A method for changing the specific gravity of the stirring body 2 is not particularly limited. For example, a part of the stirring fluid W accommodated in the stirring tank is taken in and out of the stirring body 2, that is, the stirring fluid W is tank-shaped. As the specific gravity of the stirrer A is increased by supplying it to the agitator 2, the agitating fluid W is discharged from the agitator 2 so that the agitator 1 naturally descends due to its own weight. As a result, the ascending operation is controlled so as to reduce the specific gravity of the stirrer A.
The supply / discharge control of the stirring fluid W to and from the stirring body is not particularly limited. For example, the position of the stirring body 2 is determined by a combination of a pump and a solenoid valve (both not shown). It is possible to detect by such as.
The stirring body 2 is provided with a pump and a drive energy source (both not shown), and a drive energy for incorporating a pump for changing the specific gravity of the stirring body 2 by water supply / drainage into the tank-like stirring body 2. It is driven by receiving necessary power from a source, for example, a storage battery (not shown).
In this way, by changing the specific gravity of the stirring body 2 in the supply / discharge control of the stirring fluid W, the stirring fluid W can be lifted and lowered efficiently, even in a high-depth tank, with uniform power, It can be ensured.

  The agitation tank 1 is not particularly limited. For example, as shown in FIG. 1, the agitation tank 1 has a shape capable of agitating the agitation fluid W to be accommodated, such as a cube having a required internal volume, a rectangle, or a circle. Although not shown in the figure, the stirring fluid W is supplied into the stirring tank 1 as needed, and the treated water after stirring is drained, and the stirring body 2 is provided above the stirring tank 1. A guide bar support 6 for supporting the penetrating guide bar 5 is disposed, and the guide bar 5 for supporting the stirrer A to be movable up and down is vertically suspended or supported on the guide bar support 6. It can be so.

Thereby, when the stirring body 2 moves up and down in the stirring tank 1, the guide bar 5 guides the restraint of the plane position range when the stirring body 2 moves up and down so that the stirring body 2 can be moved up and down smoothly. When the body 2 is moved up and down, a changeover switch and a sensor (both not shown) for switching the rotation direction of the pump are arranged in the electric circuit so as to stop at a predetermined fixed position.
In addition, although the upper surface of this stirring tank 1 is opening, it can also be set as a sealing type.

Next, the operation of the stirrer A will be described.
By supplying the stirring fluid W into the stirring tank 1 and driving the pump in the stirring body 2, a part of the stirring fluid W is sucked into the stirring tank 1, and the fluid w sucked into the stirring body 1 The air a in the stirring body is compressed according to the amount. By contracting the air in the stirrer 2, the weight mixing ratio of the air (gas) a and the fluid w is changed.
As a result, the weight ratio of the stirring fluid increases and the average specific gravity decreases, so that the specific gravity of the stirring body 2 increases, and the fluid w in the stirring body 2 changes from the empty state of FIG. It is accommodated until it is filled as shown in 1 (B), and the stirring body 2 descends along the guide rod 5 in the stirring tank 1 according to the filling amount of the fluid w.

And it detects that the stirring body 2 reached | attained the tank bottom part, and the fluid w in the stirring body 2 is discharged | emitted in the stirring tank 1 through each nozzle 3. FIG. The discharge of the fluid w is not particularly limited. For example, the fluid w is discharged by releasing a solenoid valve (not shown) and driving a discharge pump (not shown). The discharge of the fluid w from the nozzle 3 becomes a jet, and the jet liquid is used to stir the stirring liquid in the stirring tank.
It should be noted that the release of the solenoid valve for discharging the fluid w or the driving of the pump can be stopped when a preset time with a timer elapses.

The discharge of the fluid w in the stirring body 2 causes the air a that has been compressed and contracted in the stirring body 2 to expand again, and the specific gravity of the stirring body 2 changes, that is, the specific gravity decreases. For this reason, the buoyancy of the stirring body 2 is increased, the buoyancy acts on the stirring body 2, and the stirring body 2 rises in the stirring tank 1 along the guide rod 5.
In this way, the stirring body 2 is moved up and down (floating) by changing the specific gravity of the stirring body 2 by the supply and discharge action of the fluid w, and stirring is performed with the discharge jet of the fluid w when the stirring body 2 is lifted. By repeating this operation, the entire agitation tank 1 is agitated.

3 to 4 show a second embodiment of the stirrer of the present invention.
In the second embodiment, the stirring blade 4 for generating the rotational driving force is arranged on the stirring body 2 of the first embodiment, and the synergistic effect of the jet flow from the nozzle and the stirring by the stirring blade 4 is efficient. The fluid w is agitated.

As shown in FIGS. 3 to 4, a plurality of the stirring blades 4 project from the upper outer peripheral surface of the stirring body, but this is not particularly limited. For example, in the illustrated embodiment, 6 Each of the stirring blades 4 is provided so as to protrude in the radial direction at substantially equal intervals, whereby when the stirring body 2 moves up and down by changing the specific gravity by water supply or drainage, The agitator 2 is formed in a shape that rotates in the clockwise direction or counterclockwise by receiving the resistance force of the liquid on the blades 4. The size, shape, and number of the stirring blades 4 correspond to the size of the stirring tank.
The other configurations and basic actions of the stirrer A are the same as those of the stirrer of the first embodiment.

  As mentioned above, although the stirrer of this invention was demonstrated based on the several Example, this invention is not limited to the structure described in the said Example, The structure is suitably changed in the range which does not deviate from the meaning. It is something that can be done.

  The stirrer of the present invention raises and lowers the fluid in the stirring tank by changing the specific gravity of the stirring body, and stirs the stirring fluid by discharging and ejecting the stirring fluid from the stirring body when rising (when floating) Since it has the property of uniformly stirring the entire tank, it can be suitably used for stirring a reaction tank (anaerobic tank or anoxic tank) in a sewage treatment plant. It can also be used for the purpose of chemical reaction tank agitation and tank bottom condition sensing machine (a person confirms the data sensed at the tank bottom at the top of the liquid).

1 shows a first embodiment of a stirrer according to the present invention, in which (A) is a front longitudinal sectional view showing that the stirring fluid is not filled; It is an expansion external appearance perspective view of a stirring body. It is a front longitudinal cross-sectional view which shows 2nd Example of the stirrer of this invention. It is an expansion external appearance perspective view of a stirring body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirring tank 2 Stirring body 3 Nozzle 4 Stirring blade 5 Guide rod 6 Guide rod support A Stirrer a Air W Stirring fluid w Fluid in stirrer

Claims (4)

  A stirrer that moves up and down in the stirring fluid in the stirring tank by its own specific gravity change, and a plurality of nozzles that eject the discharged liquid from the stirring body when ascending in the stirring fluid in the stirring tank The stirrer is characterized in that the nozzle is protruded from the outer periphery of the stirrer.   2. The stirrer according to claim 1, wherein the stirrer has a tank shape capable of supplying and discharging fluid to and from the stirrer and is lifted and lowered by being guided by a guide rod penetrating the stirrer.   The stirrer according to claim 1 or 2, wherein the nozzle protruding from the stirrer is arranged radially or obliquely downward at a lower outer peripheral position of the stirrer.   2. A rotary drive agitating blade configured to rotate the agitator with a fluid resistance of the agitating fluid received when the agitator is moved up and down is provided on the outer periphery of the upper part of the agitator. The stirrer according to 2 or 3.

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