JPH08150328A - Agitating discharge device for soft mud and muddy water - Google Patents

Abstract

PURPOSE: To provide an agitating discharge device which is easy to install in a sludge basin and by which a solidifying material or the like is uniformly kneaded. CONSTITUTION: In a cylindrical device body 3, a turbine 4 driven by discharge energy of a mud feeding pipe 2 and a mixer 5 coaxially arranged and driven by the turbine 4 are installed, and also a discharge port 6 for discharging soft mud and muddy water kneaded and agitated by the mixer 5 to a sludge basin is installed. Installing a new facility such as a driving source of a mixer is not required, and by this device, kneading and agitation are easily and surely performed, and the turbine and the mixer are coaxially arranged to miniaturize the device, thereby its traveling and installation are made easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agitating / discharging device used when discharging soft mud or mud transferred by using air pressure or water flow to a drainage pond.

[0002]

2. Description of the Related Art A method of transferring dredged sludge, silt, and soft mud such as clayey sand to compressed mud through a mud pipe to a mud pond is known as a pneumatic feeding method. Further, in the case of muddy water containing a large amount of water, it is transferred by using a water flow that is pumped by a pump or the like instead of compressed air. In these cases, it is generally necessary to solidify the soft mud soil transferred to the drainage pond by some method or to coagulate and settle the mud, so a device such as a backhoe or a dedicated processor in the drainage pond is required. Add the solidifying material to the soft mud and the settling material in the case of muddy water, and mix and stir to solidify or coagulate and settle, or the mixer installed in the intermediate treatment site A plant-type treatment method in which an additive material is kneaded and stirred is usually adopted. However, with these methods, it takes a lot of time and labor for the treatment, the equipment becomes large, and the treatment effect tends to be uneven, so that it is necessary to use the additive material in excess of the designed value, resulting in a high treatment cost. There was a problem that became.

Therefore, in order to solve these problems,
For example, in the case of the pneumatic feeding method, a method has been proposed in which a solidifying material is added in the process of transferring soft mud through a mud pipe, kneading and agitating during the transfer, and discharging it to a mud pond to solidify it. For example, JP-A-51-99846,
See Japanese Patent Application Laid-Open No. 4-102614). According to these methods, a step for kneading treatment in the drainage mud and a special device are not necessary, and in this respect, one of the problems of the above-mentioned prior art can be solved.

However, in reality, the kneading of the soft mud and the solidifying material is not sufficiently performed simply by transferring the solidification material in the pressure-feeding pipe, and when the amount of the soft mud soil or the mud content varies, the necessary amount of the solidifying material is increased. Since it may change, the problem that the solidification treatment effect tends to be uneven has not been completely solved. For this reason, there is a tendency that the purpose of use of the drainage mud after solidifying the soft mud and the disposal plan for the sediment cannot be achieved in many cases, and as a result, it is necessary to take measures to add the solidifying material in excess of the design value. It was.

It has been proposed that a mixer installed at an intermediate treatment site be driven by the discharge energy of a mud pipe (see, for example, Japanese Patent Application Laid-Open No. 4-45878). There is a problem that the subsequent soft mud must be transported to the drainage pond, which requires time and labor for processing, and the device is large and difficult to move, resulting in lack of mobility.

[0006]

In consideration of the above points, the present invention is easy to install in the final destination, the mud basin, and enables uniform kneading of additive materials such as solidifying materials. The purpose is to obtain a stirring and discharging device.

[0007]

In order to achieve the above-mentioned object, the stirring and discharging device of the present invention has a discharge port of a mud-sending pipe which is opened in the tangential direction of the inside of a cylindrical device body. A turbine driven by the discharge energy of soft mud and muddy water, which is arranged at a position corresponding to the above, and a mixer driven coaxially by the turbine and driven by the turbine, and a soft mud mixed and stirred by this mixer. And a discharge port for discharging muddy water to a mud pond.

In addition, a fluid separation pipe is provided which branches upward before the discharge port of the mud-sending pipe to open the discharge port inside the apparatus main body, and an additive injection port for supplying an additive into the apparatus main body. Is provided, and the tip of the additive injection port is arranged in the jet flow from the discharge port of the fluid separation pipe or very close to the jet flow.

The rotating shaft of the turbine and the rotating shaft of the mixer may be one continuous shaft, or both rotating shafts may be separate shafts. In the latter case, a buffer means may be interposed between both rotary shafts, and the driving force may be transmitted through the buffer means.

[0010]

In the present invention, since the mixer can be driven by utilizing the discharge energy when a mixed phase flow of air and soft mud or muddy water is discharged from the mud pipe, a new drive source for kneading and stirring, etc. No equipment is required, and the turbine and mixer are arranged coaxially, so the device is downsized,
It can be installed anywhere in the mud pond to discharge soft mud and mud from the outlet.

Further, although the conventional equipment of the system of injecting the slurry-like solidifying material or the like can be used as it is in the upstream portion of the mud sending pipe, a fluid separation pipe is provided and an additive material injection port is provided at its discharge port. With the arrangement, it is possible to reliably suck out the additive material by the suction action using the jet flow of the fluid, so after adding a prescribed amount of the additive material with this stirring and discharging device, mix and stir thoroughly. You can

Also, in the case where the turbine and the mixer are formed on one continuous shaft, the structure is simple and the driving force of the turbine is efficiently transmitted to the mixer. Also,
In the case where the buffer means is provided between the turbine and the mixer,
Since the shock at the time of starting the operation is softened, the stress generated in the constituent members is small, and the damage accidents are reduced.

[0013]

EXAMPLES Next, examples shown in FIGS. 1 to 6 will be described. 1 to 3 show a first embodiment corresponding to claims 2 and 3, wherein 1 is a stirring and discharging device and 2 is a mud sending pipe.

In the figure, 3 is a cylindrical tank-shaped apparatus main body, 4 is a turbine provided in the upper portion inside the apparatus main body, 5
Is a mixer provided in the lower portion of the inside of the apparatus main body, 6 is an outlet provided in the lowermost portion of the apparatus main body 3, 7 is a rotating shaft, 8 is an air vent provided on the upper surface, and 9 is also provided on the upper surface. Additive injection port 10 is a slide gate that opens and closes discharge port 6.

The rotary shaft 7 penetrates the axial center of the apparatus main body 3 and is supported at both ends by end bearings 11a and at the center by a central bearing 11b supported by a support fitting 11c.
The mixer 5 is constructed by mounting a plurality of turbine blades 4a on the upper part of the rotary shaft 7 and a plurality of stirring blades 5a on the lower part.

The mud pipe 2 is connected to a transfer source by, for example, a pneumatic feeding method, and a discharge port 2a of its end is tangentially opened to a portion of the apparatus main body 3 where the turbine 4 is provided. . Further, a fluid separating pipe 12 branched upward is provided in front of the discharge port 2a, and the discharge port 12a is similarly opened tangentially to a portion above the turbine 4 of the apparatus main body 3, as shown in FIG. As described above, the above-mentioned additive injection port 9 is arranged so that its tip 9a approaches the discharge port 12a, and both axes intersect. Additive injection port 9
Is properly connected to an additive source such as an additive tank, but the additive source is not shown.

With the above structure, the mixed-phase flow of compressed air and soft mud soil discharged from the discharge port 2a hits the turbine blade 4a, and the discharge energy causes the turbine 4 to rotate and the coaxial mixer 5 to rotate. . Further, a part of the air in the multiphase flow is separated from the multiphase flow, and the fluid separation pipe 1
Since it flows into 2 and is ejected from the discharge port 12a, the additive material is sucked out from the additive material injection port 9 by its suction action. As a result, the multiphase flow swirls inside the apparatus main body 3 to separate compressed air and soft mud, and the soft mud that descends while swirling as shown by the arrow is stirred with the additive supplied from the additive injection port 9 along with a stirring blade. It is stirred at 5a.

That is, the stirring and discharging device 1 operates as a device that also serves as a cyclone and a mixing device. By raising the slide gate 10 and opening the discharge port 6, the soft mud soil sufficiently kneaded with the additive material. Is discharged from the discharge port 6 as indicated by the arrow. Most of the air separated from the soft mud is discharged from the air vent 8.

In the above embodiment, the additive material is added by the main body 3 of the apparatus. However, in the case of injecting a slurry-like solidifying material or the like in the upstream portion of the mud transport pipe 2, the fluid separation pipe 12 is used. The additive injection port 9 may not be provided. This device can also be used for the purpose of simply transferring the soft mud without adding the additive to reduce the discharge energy and discharge it. In this case as well, the fluid separation pipe 12 and the additive injection port 9 are You don't have to.

Although the above description is for the case of transferring the soft mud by the pneumatic feeding method, the stirring and discharging device 1 of the embodiment of FIG. 1 is also used when the mud containing a large amount of water is pumped and transferred. it can. That is, when the muddy water is transferred by the muddy water pipe 2, the turbine 4 is driven by the muddy water discharge energy, and at the same time, a part of the water in the muddy water is jetted from the discharge port 12 a through the fluid separation pipe 12 and added. The materials are sucked out from the additive material inlet 9, mixed and stirred in the apparatus body 3, and discharged from the outlet 6.

As an additive material for solidifying the soft mud in the drainage pond, for example, a cement-based, lime-based or carbonate aluminate salt-based solidifying material is used. As the additive material, for example, a PAC, a sulfuric acid band, a polymer or a carbonate aluminate salt-based coagulating sedimentation material is used.

As described above, even in the case of muddy water, the same stirring and discharging apparatus 1 as in the above-mentioned embodiment can be used mainly for the purpose of coagulating and settling, but muddy water has a large water ratio and high fluidity. It is immediately discharged from the outlet.
For this reason, it is desirable that the residence time in the apparatus main body 3 be extended so that the stirring is sufficiently performed. FIG. 4 and FIG. 5 show an embodiment in which these points are taken into consideration and the structure is particularly suitable for transferring muddy water.

That is, in this example, the apparatus main body 3 is installed in a state in which the apparatus main body 3 is largely tilted and laid down, and the arrangement of the discharge port 6 and the slide gate 10 for opening and closing the discharge port 10 is also changed accordingly. Further, the fluid separation pipe 12 as in the above-described embodiment is not provided, and the additive injection port 9
Is arranged corresponding to the discharge port 2a of the pressure feeding pipe 2. Of course, the air bleeder 8 is also unnecessary.

This embodiment has the above-mentioned structure, and the muddy water discharged from the discharge port 2a of the mud pipe 2 is the turbine blades 4.
Upon hitting a, the turbine 4 is rotated by the discharge energy, and the additive material is sucked out from the additive material inlet 9 by the suction action of the muddy water flow at this time. Further, since the device body 3 is inclined, the muddy water is not discharged immediately and stays inside the device body 3 for a relatively long time while swirling as shown by the arrow, and while being sufficiently stirred by the mixer 5, the discharge port is discharged. It is discharged after going through 6.

The apparatus main body 3 may be installed in a completely horizontal posture, and in order to prolong the retention time of muddy water,
The discharge port 6 may be provided in the upper portion as shown by the chain line instead of the lower portion.

In each of the above embodiments, the turbine 4 and the mixer 5 are constructed using the common rotary shaft 7,
The rotating shafts of the turbine 4 and the mixer 5 may be separate bodies. FIG. 6 shows an example thereof, in which the rotating shaft 7a of the turbine 4 and the rotating shaft 7b of the mixer 5 are coaxially arranged and supported by the end bearing 11a and the central bearing 11b. 7b are connected via a buffering means 13. As the cushioning means 13, a joint having a function of absorbing or absorbing shock, such as a fluid joint or a rubber coupling, can be used. This reduces the stress applied to the rotating shafts and blades of the turbine 4 and the mixer 5 at the start of operation or when the load changes abruptly.
It is possible to reduce the occurrence of breakage accidents of these constituent members.

Although the stirring blade 5a is not shown in FIG. 2 and eight turbine blades 4a are provided as shown by a broken line, the number of each blade is not limited to eight. Further, as the structure of the turbine 4 and the mixer 5, the shape of each blade, and the like, known ones other than those shown in the drawings can be appropriately adopted.

FIG. 7 is a schematic view showing, for reference, an example of an air pressure feeding system using the stirring and discharging apparatus 1 of the present invention. In the figure, reference numeral 15 is a barge, 16 is a parallel dredge attached to the barge 15, and is a dredging device that is lifted and lowered by a winch (not shown). And an inclined screw conveyor 17 is connected to the upper part. The sludge pipe 2 having a pressurizing pump 18 is connected to the inclined screw conveyor 17, and a compressed air supply source 19
The compressed air from is supplied. Reference numeral 20 denotes an additive addition device, 21 denotes a drainage mud, and 22 denotes soft mud discharged to the drainage mud.

According to this system, the soft mud dredged by the dredging device 16 is sent to the mud feed pipe 2 by the inclined screw conveyor 17 and the pressurizing pump 18. When the compressed air supplied from the supply source 9 is transferred to the stirring and discharging device 1, the additive material is supplied and kneaded from the adding device 20 and then discharged to the drain mud basin 21. .

Since the soft mud and the additive are kneaded and agitated by the agitating / discharging device 1, the additive adding device 20 for the additive is disposed at an upstream portion or a downstream portion of the mud pipe 2 as shown by a chain line. It is also possible to add an additive. Further, even if the additive is not in the form of slurry but in the form of fine powder such as powder or granules, it can be sufficiently kneaded and stirred. Therefore, in this case, it is not necessary to manufacture the slurry, and there is an advantage that the equipment is simple as compared with the slurry injection method.

[0031]

As is apparent from the above description, in the stirring and discharging device of the present invention, the discharge port of the mud sending pipe is opened in the tangential direction of the cylindrical device body, and the position corresponding to this discharge port is formed. A mixer driven by the discharge energy is provided in the mixer, and a mixer driven coaxially with the turbine and driven by the turbine, and a soft mud and mud mixed and agitated by the mixer are discharged to a discharge mud pond. Since it has an outlet, there is no need to install new equipment such as a drive source for the mixer, and this device can easily and surely perform kneading and stirring, and the turbine and the mixer are coaxially arranged. The device is downsized.

Therefore, the equipment is enlarged as in the conventional treatment at the disposal site or the intermediate treatment site, or the additive is added in the process of transferring the soft mud and mud, and the mixture is kneaded and stirred during the transfer. It does not cause insufficient kneading like the method of discharging to the drainage pond, and it is easy to install it in any place of the drainage pond and discharge the mud soil and mud directly to the drainage pond, Further, it is possible to significantly reduce the processing cost without requiring an additional additive.

Further, in the case where a fluid separating pipe branching upward is provided in front of the discharge port of the mud sending pipe, and the additive is sucked by the jet flow from the discharge port of the fluid separating pipe, the additive is excessive It becomes easy to supply without any shortage, and it is possible to prevent waste of the additional material and insufficient addition.

Further, when the rotating shaft of the turbine and the rotating shaft of the mixer are constituted by one continuous shaft, the structure is simplified and the driving force of the turbine is efficiently transmitted to the mixer. Further, in the case where the both rotary shafts are formed of separate shafts and the cushioning means is provided between them, the shock at the time of operation is softened, so that damage accidents are reduced.

[Brief description of drawings]

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

FIG. 2 is a plan view of the embodiment.

3A and 3B are a plan view and a side view of a main part of the embodiment.

FIG. 4 is a side view of another embodiment.

FIG. 5 is a front view of the same embodiment.

FIG. 6 is a side view of another embodiment.

FIG. 7 is a schematic diagram showing a configuration of an example of a pneumatic feeding system using the stirring and discharging device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Agitating and discharging device 2 Mud pipe 2a Discharge port 3 Device body 4 Turbine 4a Turbine blade 5 Mixer 5a Stirring blade 6 Discharge port 7, 7a, 7b Rotating shaft 9 Additive injection port 9a Tip 12 Fluid separation pipe 12a Discharge port 13 Buffer means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B65G 53/30 Z C02F 11/00 A E02B 5/08 101 Z

Claims (4)

[Claims] 1. A stirring and discharging device for kneading and stirring soft mud or muddy water transferred through a mud sending pipe by using air pressure or water flow and discharging the mixed mud water to a mud pond, which is a cylindrical device main body. In addition, the discharge port of the mud pipe is opened in the tangential direction, and a turbine driven by the discharge energy of soft mud and muddy water is provided at a position corresponding to this discharge port and is arranged coaxially with this turbine. An apparatus for stirring and discharging soft mud and mud, comprising a mixer driven by a turbine and a discharge port for discharging the soft mud and mud mixed and stirred by the mixer to a discharge mud pond. 2. An additive injection port for supplying an additive to the inside of the apparatus main body while providing a fluid separation pipe branching upward in front of the outlet of the mud sending pipe to open the outlet inside the apparatus main body. The stir-discharging device for soft mud and mud water according to claim 1, wherein a tip end of the additive injection port is arranged in the jet flow from the discharge port of the fluid separation pipe or very close to the jet flow. 3. The stirring and discharging device for soft mud and mud water according to claim 1 or 2, wherein the rotating shaft of the turbine and the rotating shaft of the mixer are constituted by one continuous rotating shaft. 4. The soft mud and muddy water according to claim 1 or 2, wherein buffer means is interposed between the rotating shaft of the turbine and the rotating shaft of the mixer, and the driving force is transmitted through the buffer means. Stirring discharge device.