JPH10165962A - Sludge water treatment equipment - Google Patents

Abstract

(57) [Problem] To provide an apparatus for surely and uniformly mixing a flocculant during conveyance of sludge through a supply pipe. A flocculant supply device (7) for supplying a flocculant for sludge into a transport pipe (19) is provided in the middle of a sludge transport pipe (19), and a flocculant mixing device (9) is connected to a downstream end of the transport pipe (19). . The coagulant mixing device 9 includes a receiving unit 25,
A stirring section 27 having a shape tapering downward from the receiving section 25 is provided. The downstream end of the transport pipe 19 is connected to the center of the receiving section 25 so as to be offset. The first branch pipe 35 branches off from the transport pipe 19 between the coagulant supply device 7 and the coagulant mixing device 9, and the downstream end thereof is connected upward to the lower end of the agitation unit 27 of the coagulant mixing device 9. I have.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for separating and treating sludge water aggregates by stirring and mixing a flocculant with sludge water.

[0002]

2. Description of the Related Art Today, treatment of sludge water generated at construction sites, industrial sludge water generated during the production process of various products, or sludge water caused by domestic wastewater has become a social problem.

As one of the methods for treating sludge water, a method has been considered in which a flocculant is mixed with these to adsorb and sediment mud, dirt and organic matter in the sludge water to separate them from water. The present inventors have already developed this type of flocculant as a part of it and are promoting its use.

However, when a large amount of sludge water is treated with this flocculant or a flocculant of the same type, it is difficult to uniformly mix the flocculant into the sludge water. In particular, the sludge water is continuously treated. In the process, conventional devices cannot cope.

Therefore, in the case of continuously treating a large amount of sludge water, a new device for surely and uniformly mixing the flocculant has to be developed so that the flocculant can be fully utilized. Was desired.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is an apparatus for uniformly mixing a flocculant while conveying sludge water through a supply pipe. The task is to provide

[0007]

According to a first aspect of the present invention, there is provided a sludge water treatment apparatus, comprising: a pump for transporting sludge water into a transport pipe; A coagulant supply device for supplying into the transport pipe,
A coagulant mixing device comprising a receiving portion and a stirring portion having a shape tapering downward from the receiving portion, wherein a downstream end of the transport pipe is connected to be deviated from a center of the receiving portion. And a coagulation sedimentation tank connected to an outflow pipe extending from the upper part of the receiving portion of the coagulant mixing device, and branching off from the transport pipe between the coagulant supply device and the coagulant mixing device, A downstream end is provided with a first branch pipe connected upward to a lower end of the stirring section of the flocculant mixing device.

In the sludge water treatment apparatus according to the present invention, the sludge water is branched from the transport pipe between the flocculant supply device and the flocculant mixing device, and the downstream end thereof is connected to the pump. A second branch pipe connected to the suction pipe is provided.

In a third aspect of the present invention, the sludge water treatment apparatus branches from the transport pipe between the pump and the coagulant supply apparatus, and has a downstream end connected to the first branch pipe. It is characterized by having a tube.

According to a fourth aspect of the present invention, there is provided the sludge water treatment apparatus, wherein the amount of the sludge water supplied to the receiving section through the transport pipe and the amount of the sludge water supplied to the stirring section through the first branch pipe are changed. In order to adjust the amount, the transfer pipe, the first branch pipe and / or the third branch pipe are provided with a valve whose opening can be adjusted.

According to a fifth aspect of the present invention, there is provided a sludge water treatment apparatus, which is connected to a pump for conveying sludge water into a conveying pipe, and which is connected in the middle of the conveying pipe to supply the sludge water flocculant into the conveying pipe. A coagulant supply device, a closed stirring vessel, a stirring shaft provided in the stirring vessel, a driven rotating body containing a stirring blade and a magnet attached to the stirring shaft, and adjacent to the driven rotating body. A drive rotator housing a magnet provided outside the stirring vessel,
It is characterized by comprising a coagulant mixing device to which the downstream end of the transport pipe is connected, and a coagulation sedimentation tank connected to an outflow pipe extending from the top of the coagulant mixing device.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire structure of a sludge water treatment apparatus 1 of the present invention, and FIG. 2 shows a mixing and conveying mechanism 3 having a characteristic configuration of the present invention.

The mixing / conveying mechanism 3 includes a pump 5, a coagulant supply device 7, and a coagulant mixing device 9 as main devices, which are directly or on a base 13 with casters 11. It is fixed via a gantry 12.

The pump 5 has a drive motor 15,
By driving the drive motor 15, the pump 5
The sludge water in the tank 18 is sucked from the sludge water suction pipe 17 connected to the side of the pump, and supplied to the transport pipe 19 connected to the upper surface of the pump. Note that the discharge amount from the pump 5 can be continuously changed by operating the control panel 21 disposed near the coagulant supply device 7.

The transport pipe 19 is bent in the horizontal direction on the way and extends to the upper end of the coagulant mixing device 9, and the coagulant supply device 7 is provided with a stainless steel dry case 83 and a suction pipe 85 on the way. (See FIG. 3).
reference). The coagulant supply device 7 is a device that can supply a fixed amount of powder per unit time by the flow of the sludge water when the sludge water flows in the transport pipe 19. A plurality of fins 87 are formed inside the dry case 83. In the dry case 83,
A dryer 89 is connected to blow hot air into the dry case 83. Note that a pre-suction pipe 86 is attached to the transport pipe 19, so that the coagulant and other processing agents can be supplied from the pre-suction pipe 86 as well.

In the present invention, a powdery flocculant is placed in the flocculant supply device 7 so that the flocculant can be continuously and quantitatively supplied into the transport pipe 19. Control panel 21
Is controlled, the amount of the coagulant supplied from the coagulant supply device 7 into the transport pipe 19 can be changed. When warm air is blown into the dry case 83 from the dryer 89, the fins 87 become hot, the inside of the dry case 83 is kept dry, and moisture is removed from the pipe 1.
9 can be prevented from entering the coagulant supply device 83.
Therefore, the coagulant supplied from the coagulant supply device 87 is
It is always supplied to the pipe 19 in a dispersed state. The reason why the plurality of fins 87 are provided on the dry case 83 is to increase the area that receives heat.

As shown in FIG. 4, the flocculant mixing device 9 has a hollow cylindrical receiving portion 25 and a substantially inverted conical stirring portion 27 extending from the receiving portion 25 while gradually reducing the diameter of the receiving portion 25 with a flange 26 interposed therebetween. It comprises. The inner peripheral surface of the coagulation / mixing device 9 is coated with polytetrafluoroethylene so that the coagulated material is less likely to adhere.

The end of the transfer pipe 19 is connected to the circumferential side surface of the receiving portion 25 from the tangential direction of the circumferential side surface. The transport pipe 19 is attached at a position deviated from the center of the receiving section 25. Further, one end of an outflow pipe 33 extending to a coagulation sedimentation tank to be described later is connected through the top surface 31 of the receiving portion 25 (see FIG. 4). A plurality of inclined disks 28 are fixed to the outer periphery of a portion of the outflow pipe 33 protruding into the receiving portion 25. The plurality of inclined disks 28 are arranged such that the directions of inclination are alternately changed. Further, at the lower end of the coagulant mixing device 9, a transport pipe 19 is provided.
The downstream end side of the first branch pipe 35 branching from is connected, so that a part of the sludge water flowing in the transport pipe 19 is discharged upward from the lower end of the stirring section 27 by fluid pressure. Has become.

Here, the function of the coagulant mixing device 9 will be briefly described. The coagulant mixing device 9 is similar in form to a cyclone, but its function is similar to that of a cyclone. That is, the sludge flowing into the receiving portion 25 of the coagulant mixing device 9 is discharged to the receiving portion 2 similarly to the cyclone.
From 5 to the agitating section 27, it attempts to move downward while spirally moving along the inner surface thereof.

However, since the sludge flowing from the downstream end of the first branch pipe 35 into the stirring section 27 tries to proceed straight straight upward in the stirring section 27, the two flows interfere with each other and generate severe turbulence. . As a result, the sludge water flowing from the receiving portion 25 and the sludge water flowing from the first branch pipe 35 are well mixed, and at this time, the sludge water and the coagulant are surely and uniformly mixed. Further, by the inclined disk 28,
A turbulent flow is generated in the sludge water and mixing is further promoted. Therefore, the flocculant mixing device 9 has a function substantially different from that of the cyclone that precipitates the dispersion from the fluid containing the dispersion and separates the fluid and the dispersion. The operation of the coagulant mixing device 9 will be described in more detail when describing the operation of the present application device.

From the transfer pipe 19, a second branch pipe 37 and a third branch pipe 39 are branched. The second branch pipe 37 is
The downstream end is connected to a sludge water suction pipe 17. The third branch pipe 39 is branched, and one end thereof is connected to the middle of the first branch pipe 35.

The transport pipe 19 is provided with a first valve 41 on the upstream side of the branch position of the third branch pipe 39 so as to connect the connecting point of the coagulant supply device 7 and the first and second branch pipes 37 and 39. A second valve 43 is provided between the first and second positions, and a third valve 44 is provided upstream of the coagulant mixing device 9.

The first branch pipe 35 has a third branch pipe 39.
The fourth valve 4 is located at a position downstream of the point where
5 is provided, and the second branch pipe 37 and the third branch pipe 39 are also provided with a fifth valve 47 and a sixth valve 49, respectively. Further, a seventh valve 51 is provided in the outflow pipe 33 extending from the coagulant mixing device 9.

The outflow pipe 33 is connected to a coagulation sedimentation tank 53 via a hose 91. As shown in FIGS. 1 and 5, four cyclones 55 are provided in the coagulation sedimentation tank 53, and these are connected to branch pipes 57 branching alternately from the outflow pipe 33. Thereby, when the sludge water flocculated by the flocculant flows through the outflow pipe 33, it falls into each cyclone 55, falls and accumulates at the lower end of the flocculation settling tank 53. The inner peripheral surface of the cyclone 55 is coated with polytetrafluoroethylene so that aggregates are less likely to adhere.

An agglomerate suction pipe 93 is connected to the bottom of the agglomeration sedimentation tank 53, and a pump 95 is connected to the agglomerate suction pipe 93. Sludge can be sent to An eighth valve 97 is attached to an intermediate portion of the aggregate suction pipe 93. A washing nozzle 99 is arranged on the coagulated sedimentation layer 53, and a washing pipe 101 is connected to the washing nozzle 99. A pump 103 is connected to the cleaning pipe 101.
The cleaning water in the cleaning water storage tank (not shown) is sent by the operation of the pump 103, and the cleaning water is jetted from the cleaning nozzle 99. The cleaning pipe 101 has a ninth valve 10
2 are installed.

The effluent water storage tank 103 is connected to the coagulation sedimentation tank 53, and the supernatant of the coagulation sedimentation tank 53 is supplied to the effluent water storage tank 1
03. Discharge water storage tank 103
Is connected to the sludge water suction pipe 17 via the reflux pipe 105. The return pipe 105 has a pump 107
The pump 107 and the discharge water storage tank 10
A tenth valve 109 is provided between the third valve and the third valve.
In FIG. 1, reference numeral 111 denotes a pressure gauge.

The sludge water treatment apparatus 1 of the present invention has the structure as described above. Hereinafter, the operation state will be described. First, before starting the operation of the present apparatus, the valves provided on each pipe are adjusted to have an appropriate opening degree, and the control panel 21 is operated to control the rotation speed of the drive motor 15 and the flocculant supply device. The supply speed of the flocculant from Step 7 is adjusted to a preset value. By driving the drive motor 15 in this state, the sludge water stored in the tank 18 is sucked up by the suction force of the pump 5 and sent into the sludge water suction pipe 17 and further into the transport pipe 19.

A part of the sludge flowing in the transport pipe 19 flows directly into the first branch pipe 35 via the third branch pipe 39. The ratio of the sludge flowing into the third branch pipe 39 is the first
It is determined by the opening of the valve 41 and the sixth valve 49. Since the coagulant is not directly supplied to the sludge water flowing into the third branch pipe 39, the required amount of sludge water is allowed to flow into the third branch pipe 39 as needed.

The remaining sludge that has not flowed into the third branch pipe 39 flows through the transport pipe 19 as it is and reaches the connection point of the coagulant supply device 7. Here, since a fixed amount of the coagulant is continuously supplied into the transport pipe 19, the sludge water and the coagulant are partially mixed. However, since the viscosity of the sludge water is high, the flocculant is not evenly mixed with the sludge water.

Thereafter, the sludge water flowing in the transport pipe 19 flows in the transport pipe 19 as it is,
The flow branches into a first branch pipe 35 and a flow branching into a second branch pipe 37 via the branch pipe 39. The flow branched to the second branch pipe 37 is returned to the sludge water suction pipe 17 again, and is again poured into the transport pipe 19 by the pump 5. Since the sludge water that follows such a path passes through the pump 5 with the flocculant mixed, the sludge water and the flocculant are strongly stirred and mixed in the pump 5. Therefore, mixing of the flocculant and the sludge water is promoted. The amount of sludge flowing along such a path is controlled by the opening of the fifth valve 47.

The flow branched to the first branch pipe 35 is
It merges with the flow through the sixth valve 49 in the third branch pipe 39 and flows into the lower end of the stirring section 27 of the coagulant mixing device 9. Then, a flow is generated from the lower end of the stirring section 27 to a position directly above the stirring section 27. In addition, the sludge water that proceeds as it is through the transport pipe 19 is supplied to the receiving section 25 of the flocculant mixing device 9.
Therefore, a spiral flow is generated downward from the receiving portion 25 to the stirring portion 27 along the inner surface.

As shown by the arrows in FIG. 4, the downward spiral flow and the flow just above the agitating section 27 interfere with each other in the agitating section 27 to generate a violent turbulent flow. . As a result, the sludge water flowing from the receiving portion 25 and the sludge water flowing from the first branch pipe 35 are well mixed, and
The sludge water and the flocculant are mixed reliably and evenly. In this way, the contact area between the sludge water and the flocculant increases, and the mud, dust, organic matter, and the like in the sludge water aggregate with each other.

In the agitating section 27, aggregates are sequentially discharged to the outflow pipe 33 by the force of the sludge flowing upward from the lower end thereof.
It is sent inside. When the aggregate of the sludge water reaches each cyclone 55 of the aggregation and sedimentation tank 53, the aggregate with a large specific gravity precipitates and finally accumulates at the lower end of the aggregation and sedimentation tank 53.

The aggregate collected at the lower end of the coagulation sedimentation tank 53 is
It is sucked from the aggregate suction pipe 93 by the suction force of the pump 95 and collected in the aggregate recovery tank. In this way, the sludge water in the tank 18 is continuously subjected to the coagulation treatment, and only the supernatant of the sludge water remains at the upper end of the coagulate sedimentation tank 53. This supernatant flows into the discharge water storage tank 103 and is discharged. In addition, a part of the supernatant is supplied to the pump 10
By the suction force of 7, is sent to the sludge water suction pipe 17,
It is mixed with the sludge water and returned from the transport pipe 19 to the above-mentioned path by the pump 5. Since the supernatant contains the flocculant, it has a flocculant effect. By mixing this with the sludge water, the amount of the flocculant to be fed can be reduced.

The coagulated matter adhering to the coagulated sedimentation tank 53 is washed away by injecting washing water from a washing nozzle 99 by a pump 103.

Next, another embodiment of the sludge water treatment apparatus 1 of the present invention will be described with reference to FIGS. In the apparatus of this embodiment, of the apparatus shown in FIG. 1, only the mixing and conveying mechanism 3 is changed to another mixing and conveying mechanism 30 as shown in FIG. 6, the same components as those in the apparatus shown in FIG. 1 are denoted by the same reference numerals.

The mixing / conveying mechanism 30 has substantially the same structure as that of the mixing / conveying mechanism 3 described above, but another coagulant mixing apparatus 90 is provided instead of the coagulant mixing apparatus 9 in the mixing / conveying mechanism 3. Have been. This coagulant mixing device 90
The rotating shaft 61 rotatably supported at the upper and lower ends of the container in a closed stirring container 59 as shown in FIG.
The rotating shaft 61 is provided with two stirring blades 63.

At the upper end of the rotating shaft 61, a driven rotating body 62 containing a magnet 60 is fixed to the rotating shaft 61. The magnet 71 is placed on the top plate 65 of the stirring vessel 59.
Is mounted on the drive shaft 69 of the motor 67. With such a configuration, when the driving rotating body 73 rotates, the driven rotating body 62 rotates in conjunction with the attraction force of the magnets 60 and 71.

As shown in FIG. 6, the downstream end of the transport pipe 19 is connected to the lower end of the side surface of the stirring vessel 59, and the outflow pipe 33 is connected to the upper end of the side face of the stirring vessel 59.
Unlike the embodiment of FIG. 1, the downstream end of the third branch pipe 39 is connected to the transport pipe 19 downstream of the coagulant supply device 7, thereby bypassing the coagulant supply device 7. Has become. In this embodiment, only the transport pipe 19 is connected to the stirring vessel 59.

Sludge water treatment apparatus 1 having such a structure
Then, similarly to the above embodiment, after the coagulant is supplied from the coagulant supply device 7 to the sludge water flowing in the transport pipe 19, the sludge water enters the container from the lower end of the stirring vessel 59.

In the stirring vessel 59, the driven rotator 62 is interlocked with the rotation of the driving rotator 73 by the action of the magnet.
Rotates, and as a result, the stirring blade 63 rotates. As a result, the sludge water that has entered the stirring vessel 59 is vigorously stirred, and the sludge water and the flocculant are evenly mixed to produce sludge water aggregates. The agglomerates are sequentially sent into the outflow pipe 33, and finally, as in the case of the apparatus shown in FIG.
And is separated from the supernatant.

Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and there are changes in the design without departing from the gist of the present invention. Are also included in the present invention. For example, a configuration may be employed in which a plurality of coagulant mixing devices 9 or 90 are provided, or a configuration in which the coagulant mixing device 9 and the coagulant mixing device 90 are used in combination. In this case, the coagulant mixing device 9 and the coagulant mixing device 90 may be arranged in series or in parallel.

Although the receiving portion 25 is formed in a circular shape, the receiving portion 25 may have a shape defined by a closed curve such as an elliptical shape, and the stirring portion 27 is not limited to a substantially inverted conical shape which gradually decreases in diameter and extends downward. Alternatively, the shape may be a polygonal pyramid that tapers downward. For example, the stirring vessel 11 shown in FIG.
As in 3, the stirring section 117 may have an octagonal shape and a shape that tapers downward. Further, a plurality of angle-shaped turbulence generating members 115 are arranged on the inner peripheral surface of the receiving portion 25, and the turbulence generating member 115 and the inclined disk 28 further promote the generation of turbulent flow of the sludge water. Is also good.

[0044]

According to the present invention, a flocculant mixing apparatus includes a receiving section having a circular horizontal cross section, and a substantially inverted conical stirring section extending downward while gradually reducing the diameter from the receiving section. The downstream end of the sludge water transport pipe is connected to the center of the receiving part. Further, the first branch pipe branches off from the transport pipe between the coagulant supply device and the coagulant mixing device, and the downstream end thereof is connected upward to the lower end of the stirring section of the coagulant mixing device.

Therefore, a part of the sludge water mixed with the flocculant flows into the receiving portion of the flocculant mixing device, and generates a spiral flow downward along the inner surface thereof. Further, since other sludge water flows from the lower end of the stirring section toward the upper direction, the spiral flow and the flow in the upper direction interfere with each other in the agitating section to generate a violent turbulent flow.

As a result, the sludge water flowing from the receiving section and the sludge water flowing from the first branch pipe are well mixed, and
The sludge water and the flocculant are mixed reliably and evenly.

A second branch pipe branched from a transport pipe between the coagulant supply device and the coagulant mixing device and having a downstream end connected to a sludge water suction pipe connected to a pump is provided. If it is, the sludge water containing the flocculant returned to the sludge water suction pipe through the second branch pipe is strongly mixed in the pump and mixes well to promote the flocculation of the sludge water. Can be done.

Further, when a third branch pipe branched from a transport pipe between the pump and the flocculant supply device and having a downstream end connected to the first branch pipe is provided, the sludge water is coagulated. A route without the addition of agents can be provided.

Further, in order to adjust the amount of sludge water supplied to the receiving section via the transport pipe and the amount of sludge water supplied to the stirring section via the first branch pipe, the transport pipe, the first When the branch pipe and / or the third branch pipe is provided with a valve whose opening can be adjusted, the opening of the valve is adjusted so that the amount of sludge water supplied to the receiving portion and the first branch pipe are adjusted. The optimum mixing state can be achieved by adjusting the ratio with the amount of sludge water supplied to the stirring section via the mixing section.

Further, the flocculant mixing apparatus includes a closed stirring vessel, a stirring shaft provided in the stirring vessel, a driven rotor containing a stirring blade and a magnet attached to the stirring shaft, and the driven rotor. A driving rotating body that houses a magnet provided outside the stirring vessel adjacent to the stirring vessel;
When the downstream end of the transport pipe is connected to the device,
Stirring can be performed while the inside of the stirring vessel is sealed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration of one embodiment of a sludge water treatment apparatus of the present invention.

FIG. 2 is a perspective view showing a mixing and conveying mechanism in the sludge water treatment apparatus of the present invention.

FIG. 3 is a cross-sectional view of the vicinity of a coagulant supply device of the sludge water treatment device of the present invention.

FIG. 4 is a partially cutaway perspective view showing a flocculant mixing device.

FIG. 5 is a top view showing the internal structure of the coagulation sedimentation tank.

FIG. 6 is a perspective view showing a mixing and conveying mechanism of another embodiment of the sludge water treatment apparatus of the present invention.

FIG. 7 is a side sectional view showing a structure of a mixing and conveying mechanism according to another embodiment.

FIG. 8 is a perspective view of a stirring vessel according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sludge water treatment apparatus 3, 30 Mixing / conveying mechanism 5 Pump 7 Flocculant supplying apparatus 9, 90 Flocculant mixing apparatus 11 Caster 13 Base 15 Drive motor 17 Sludge water suction pipe 18 Tank 19 Transport pipe 21 Control board 25 Receiving section 26 Flange 27, 117 Stirring part 28 Inclined disk 29 Circumferential surface 31 Top surface 33 Outflow pipe 35 First branch pipe 37 Second branch pipe 39 Third branch pipe 41 First valve 43 Second valve 44 Third valve 45 Fourth Valve 47 Fifth valve 49 Sixth valve 51 Seventh valve 53 Coagulation sedimentation tank 55 Cyclone 57 Branch pipe 59, 113 Stirring vessel 60, 71 Magnet 61 Rotating shaft 62 Follower rotating body 63 Stirring blade 65 Top plate 67 Motor 69 Drive shaft 73 Driving rotator 83 Dry case 85 Suction pipe 87 Fins 89 Dryer 1 hose 93 aggregates the suction pipe 95 pump 97 eighth valve 99 cleaning nozzle 101 cleaning pipe 102 Ninth valve 103 effluent 貯容 tank 105 return pipe 107 pump 109 10th valve 111 pressure gauge 115 turbulators

Claims (5)

[Claims] A pump for transporting the sludge water into the transport pipe, a coagulant supply device connected in the middle of the transport pipe and supplying the flocculant into the transport pipe, and a receiving unit And a stirring section having a shape that tapers downward from the receiving section, and a downstream end of the transport pipe is connected to the coagulant mixing device decentered with respect to the center of the receiving section, A coagulating sedimentation tank connected to an outflow pipe extending from the upper part of the receiving part of the coagulant mixing device, and a branch end from the transport pipe between the coagulant supply device and the coagulant mixing device, and a downstream end thereof And a first branch pipe connected upward to a lower end of the agitation section of the flocculant mixing device. 2. A second branch which branches off from the transport pipe between the coagulant supply device and the coagulant mixing device and has a downstream end connected to a sludge water suction pipe connected to the pump. The sludge water treatment apparatus according to claim 1, further comprising a two-branch pipe. 3. The apparatus according to claim 1, further comprising a third branch pipe branched from the transport pipe between the pump and the coagulant supply device, and having a downstream end connected to the first branch pipe. The sludge water treatment apparatus according to claim 1 or 2. 4. In order to adjust the amount of sludge water supplied to the receiving section through the transport pipe and the amount of sludge water supplied to the stirring section through the first branch pipe, The sludge water treatment apparatus according to claim 1, wherein the transport pipe, the first branch pipe, and / or the third branch pipe are provided with a valve whose opening can be adjusted. 5. A pump for transporting sludge water into a transport pipe, a flocculant supply device connected midway along the transport pipe and supplying the flocculant into the transport pipe, A stirring vessel, a stirring shaft provided in the stirring vessel, a driven rotating body containing a stirring blade and a magnet attached to the stirring shaft, and a rotating body provided outside the stirring vessel adjacent to the driven rotating body. A flocculant mixing device connected to a downstream end of the transport pipe, and a coagulating sedimentation tank connected to an outflow pipe extending from the top of the flocculant mixing device. A sludge water treatment apparatus characterized by comprising: