JPH1015306A - Discharge device for precipitate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge device for precipitate in which collection and discharge of precipitate are made easy by simple constitution and working efficiency is high and automatic operation is enabled and control is easy and both miniaturization and largesizing are easily performed and equipment and administration costs are extremely economical. SOLUTION: Precipitate C is sucked out of a suction opening 2 for precipitate by a transfer pump thereof and discharged. To increase collection efficiency of precipitate, the discharge device for precipitate consists of such basic constitution that precipitate is drifted by generating a spouting flow directed to the suction opening for precipitate. Collection of precipitate is promoted by providing a separator 5 and a filter which separates precipitate sucked by the transfer pump 4 of precipitate into concentrated precipitate and fluid for spout, extra introducing fluid for spout, providing a liquid force-feed pump for boosting fluid for spout and forming a trough groovelike uneven face in the bottom of a fluid stagnation part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to sediment, chemical substances, fibers, grass algae, and the like that accumulate at the bottom of a place where fluid stays, such as sedimentation tanks and sedimentation tanks for water supply and sewerage, and treatment tanks for chemical plants and water treatment equipment. This is related to a device that discharges sediment such as various pieces of material, especially, it is easy to collect and discharge sediment, high work efficiency, automatic operation is possible, management is not required, and downsizing is large. It is intended to obtain a sediment discharging device which can be easily implemented, and the equipment and management costs are extremely economical. It should be noted that the terms “water” and “liquid” in this specification generally represent various fluids.

[0002]

2. Description of the Related Art Conventional methods of discharging sediment include, for example, in the case of a sedimentation tank or a sand basin for water supply and sewerage, the drainage of the tank is carried out while using a bucket, a conveyor or other civil engineering equipment. There is a means such as scooping by manual operation. However, not only the labor cost is extremely high, but also depending on the liquid quality, there may be a case where oxygen deficiency or other dangers are involved. Therefore, although the work has been naturally automated, many of them use mechanical methods, such as operating a scraping device for removing the bottom of the tank by remote control, so to speak. There are problems such as high equipment costs and construction costs, as well as troublesome maintenance and inspection.

[0003]

The specific problems of these prior arts are as follows. First, although the mechanism works effectively in a desk-top design, the objects actually used are earth and sand, and chemical substances. , Fibers, grass algae, sediments such as various material pieces, and these precipitates may cause obstacles such as clogging, biting, and winding in the apparatus.
This type of equipment is always in a corrosive environment and therefore has poor durability. Third, maintenance and inspection of the equipment (especially when the equipment is submerged) is extremely complicated. ,. These problems tend to be more pronounced as the size of the device increases and as the device becomes more automated and complicated.

[0004] The present invention solves the conventional problems as described above,
It can be drastically solved by a device with a simple configuration, collecting and discharging sediment is easy, work efficiency is high, automatic operation is possible, management is not required, and miniaturization and enlargement can be implemented easily. Another object of the present invention is to obtain a sediment discharger which is very economical in terms of equipment and management costs.

[0005]

In order to achieve the above object, a sediment discharge device according to the present invention is provided in a device for discharging sediment installed at a fluid retention point, wherein the sediment discharge device opened near a sediment is provided. A sediment suction line having a material suction port, a sediment transfer pump connected to the sediment suction line and transferring sediment, and connected to a downstream side of the sediment transfer pump;
A separation device that separates a sediment and discharges a fluid with a high concentration of sediment from the sediment discharge port and a fluid with a low sediment concentration from the fluid discharge port, and the fluid connected to the fluid discharge port, And a fluid pressure feed line provided with an ejection hole in a direction in which the sediment at the stagnation point is blown toward the sediment suction port. A fluid pressure pump may be provided in the fluid pressure line. Further, a sediment discharge apparatus of the present invention includes a sediment suction pipe having a sediment suction port opened near a sediment, a sediment suction pipe connected to the sediment suction pipe, and transferring and discharging the sediment. A transfer pump, a fluid pump for pumping fluid separately taken in from a place different from the sediment suction port, and connected to a downstream side of the fluid pump to remove the sediment at the fluid stagnation point from the sediment. A configuration may also be provided that includes a fluid pressure feed line provided with an ejection hole that is directed toward the suction port. Further, the sediment discharge device of the present invention is a flexible sediment suction pipe having a sediment suction port made movable in each direction by a moving device,
A sediment transfer pump connected to the sediment suction line for transferring sediment; and a sediment transfer pump connected to a downstream side of the sediment transfer pump to separate sediment and remove a sediment-rich fluid. A separation device configured to discharge a fluid having a low concentration of sediment from the fluid discharge port from the discharge port, and a flow path configured to recirculate the fluid discharged from the fluid discharge port to the fluid retaining portion. Is also good. The separation device includes an inlet in a tangential direction of a peripheral wall surface of the cylindrical container, and includes a sediment discharge port configured to discharge a fluid having a high concentration of sediment in a tangential direction of the peripheral wall surface along a flow direction in the container. Further, a configuration may be adopted in which a fluid discharge port for discharging a fluid having a low concentration of sediment is provided on the container upper lid. Further, a filtration device may be further provided downstream of the fluid discharge port of the separation device. Further, the bottom of the fluid retaining portion may be formed with a gutter groove-shaped uneven surface. Further, the sediment suction port may be provided with a protrusion in an extension direction of the suction pipe, and the protrusion may be formed in a shape which does not hinder the passage of an object having a size passing through the suction pipe.

[0006]

In the sediment discharging apparatus according to the present invention, sediment deposited at the fluid retention point is collected and discharged by being sucked from the sediment suction port by the sediment transfer pump. Then, in order to increase the efficiency of collecting the sediment, a jet flow toward the sediment suction port is generated to blow the sediment, or to move the sediment suction port itself. When the sediment is blown out by a jet stream, a separation device or a filtration device that separates the sediment sucked up by the sediment transfer pump into a concentrated sediment and a fluid component is provided, so that the jetting fluid can be saved without waste. It is possible to recirculate the fluid at the bottom of the fluid, provide a fluid intake at the surface layer of the fluid retention point, etc. to separately take in the fluid for ejection, or to sufficiently increase the pressure of the ejection by interposing a fluid pressure pump. By forming a gutter-groove-shaped uneven surface at the bottom of the stagnation portion, sediment can be trapped in the jet flow without waste, and sediment can be collected easily and efficiently. When the sediment suction port itself is moved, the sediment suction pipe can be made flexible by moving the sediment suction line using a moving device, and the sediment can be sucked without waste, or the sucked sediment can be removed. By providing a separating device or a filtering device for separating the concentrated sediment and the fluid, the fluid can be returned to the fluid retaining portion without waste, and the sediment can be collected easily and efficiently. In any of the above cases, the sediment suction port is provided with a projection formed in a shape that does not hinder the passage of an object having a size that passes through the suction pipe, so that clogging or the like during suction of the sediment is prevented. Sticking is prevented. By these actions, the efficiency and automation of the sediment discharge operation and the reduction of equipment and management costs have been achieved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described with reference to FIG. 1 showing an embodiment based on claim 1 (hereinafter referred to as "first embodiment"). In FIG. 1, reference numeral 1 denotes a tank where a fluid stays, for example, a tank such as a sedimentation tank, in which a fluid d flows from an inlet channel a to an outlet channel b, and a sediment c is deposited on the bottom of the tank 1. The situation is shown. A sediment suction line 3 is installed on the side of the tank 1 close to the outlet channel b, and one end of the sediment suction line 3 opens near the bottom of the tank 1 to form a sediment suction port 2. . The sediment suction line 3 is connected to a separation device 5 via a sediment transfer pump 4 for transferring sediment. The separation device 5 has an inlet in the tangential direction of the peripheral wall surface of the cylindrical container, a first outlet or sediment discharge port 6 in the tangential direction of the peripheral wall surface along the flow direction in the container, and further has a container upper lid. A second outlet or fluid outlet 7 is provided.
The sediment flowing into the separation device 5 rotates and flows along the peripheral wall surface by its own inflow energy, and is separated by specific gravity by centrifugal force generated thereby, and a fluid having a high sediment concentration (concentrated sediment) From the sediment discharge port 6, a fluid having a low concentration of sediment (fluid for ejection) is discharged from the fluid discharge port 7. The concentrated sediment discharged from the sediment discharge port 6 is directly discharged out of the system or sent to the next sediment treatment process. On the other hand, the jetting fluid discharged from the fluid discharge port 7 is sent to a fluid pressure feed pipe 8 connected to the fluid discharge port 7. The fluid pressure feed line 8 further extends to the bottom of the tank 1, and the extending portion has an appropriate inclination angle in a direction in which the sediment c in the tank 1 is blown toward the sediment suction port 2. An appropriate number of perforated ejection holes 9 are provided. The sediment c at the bottom of the tank 1 is blown toward the sediment suction port 2 by the fluid spouting from the spout hole 9 so as to sweep the bottom of the tank 1 at an inclination angle, and the sediment suction port 2
To promote the collection and suction of the precipitate c. By attaching adjusting valves 12 and 13 to the sediment discharge port 6 and the fluid discharge port 7 of the separation device 5, respectively, the two discharge ports 6;
The discharge amount and the pressure can be appropriately adjusted. Separator 5
A simple strainer may be formed at the portion of the fluid discharge port 7 by, for example, stretching a mesh screen.

As for the shape of the bottom of the tank 1 of the first embodiment, as one of the preferred embodiments, a tank formed with a gutter groove-like uneven surface is shown. That is, a gutter-groove-shaped uneven surface having a ridge portion and a valley along the flow direction of the passing fluid d from the inlet channel a toward the outlet channel b is formed, and the ejection hole is formed so as to face the valley. A fluid pressure feed line 8 with 9 is laid and laid. The fluid pressure feed line 8 and the jet holes 9 are laid with a predetermined gap from the valley of the tank 1 so that they do not become obstacles to the movement of the sediment c. When the sediment c is deposited on the bottom of the tank 1 due to the gutter groove-shaped uneven surface, the sediment c is first deposited so as to be filled from the valley portion thereof.
When the sediment c soars due to the ejection of the fluid from the basin, the sediment first sinks down so as to fill the valley first, so that the orifice 9 is always in a state where the dense portion of the sediment c can be easily captured, and This not only makes the blowing and collecting by the ejection of the fluid effective, but also makes it unnecessary to dispose the ejection holes 9 on the entire bottom surface of the tank 1, and has a remarkable effect that the equipment cost is reduced. With respect to the shape of the bottom of the tank 1, if the entire bottom has a slope descending toward the outlet channel b in addition to the above-mentioned gutter-shaped shape, the blowing and collection of the precipitate c to the precipitate suction port 2 can be performed. It is of course more convenient to promote.

Next, FIG. 2 showing an embodiment based on claim 2 (hereinafter referred to as "second embodiment") will be described. In this embodiment, a fluid pump 11 is interposed between the separation device 5 and the fluid pumping line 8 of the first embodiment, and the sediment transfer pump 4 is connected to the sediment suction port 2 → the sediment suction line. 3 → Sediment transfer pump 4 → Separation device 5 → Fluid pressure feed line 8
→ When the fluid pressure pump 11 is not strong enough to overcome the flow path resistance and the like in a series of strokes of the ejection hole 9,
It serves as a booster for increasing the pressure of the jetting fluid. In FIG. 2, as a method for preventing clogging of the ejection fluid in the ejection holes 9 as much as possible and making maintenance easier, a filtration device 15 (a well-known device) is provided after the fluid pressure pump 11. (Detailed description is omitted because it is good). However, this filtering device 15
Instead of providing a filter, a simple strainer may be attached to the fluid discharge port 7 of the separation device 5, and in the case where the ejection fluid does not contain much clogging substance, the filtration device 15 is omitted. You may. Other configurations and operation modes are the same as those of the first embodiment, and thus detailed description is omitted.

Next, FIG. 3 showing an embodiment based on claim 3 (hereinafter referred to as "third embodiment") will be described. This means that the separation device 5 of the first embodiment is removed, and only the role of transferring the sediment c sucked from the sediment suction port 2 is transferred to the sediment transfer pump 4 to discharge the sediment c as it is. In this embodiment, the function of pumping the separately ejected fluid to the ejection holes 9 of the fluid pressure feed line 8 is performed by the fluid pressure pump 11. In FIG. 3,
An example is shown in which the passing fluid d of the surface layer in the tank 1 is taken in from the fluid inlet 10 as a fluid for ejection. The structure of the fluid inlet 10 may be a well-known structure equipped with a float,
A strainer or the like may be provided at the intake. When it is desired to take in a fluid at a predetermined depth as a jetting fluid, the inlet may be extended downward. In addition to using the fluid d passing through the tank 1, it goes without saying that a jetting fluid may be separately taken in from outside the system of the tank 1. The shape of the bottom of the tank 1 is exemplified by a flat bottom having no gutter groove-shaped uneven surface. In this case, in order to blow and collect the sediment c of the entire bottom of the tank 1 to the sediment suction port 2, the spout hole 9 is provided at the branch part extending from the fluid pressure feed line 8. An appropriate number is provided with inclination angles in two directions. Regarding the shape of the bottom of the tank 1, as in the other embodiments, if the entire bottom has a slope descending toward the outlet channel b, the sediment c is blown and collected to the sediment suction port 2. It is of course more convenient to promote. Other configurations and operation modes are as follows:
The detailed description is omitted because it is the same as that of the first embodiment.

Next, FIG. 4 showing an embodiment based on claim 4 (hereinafter referred to as "fourth embodiment") will be described. This is because, instead of removing the portion of the fluid pressure feeding line 8 and the ejection hole 9 of the first embodiment, the sediment c is blown toward the sediment suction port 2 by the action of the ejection flow, but the sediment suction line 3 Has a structure in which the sediment suction port 2 itself moves to a place where the sediment c exists by the moving device 14. The moving device 14 can use a well-known hoist or the like, and it takes much time and effort to operate the moving device 14 as compared with the above-described first to third embodiments, but is much easier and more efficient than the conventional method. Work. In this case, the sediment suction port 2 has a predetermined weight so that the sediment suction port 2 is not swung by the bending repulsive force of the sediment suction pipe 3. In the fourth embodiment, since the fluid discharged from the fluid discharge port 7 of the separation device 5 does not need to be used as the ejection fluid, it may be simply returned to a location such as the surface layer of the tank 1 as appropriate. If not necessary, the regulating valve 13 attached to the fluid discharge port 7 may be closed to discharge the precipitate together with the concentrated precipitate from the precipitate discharge port 6 to the outside of the system. In addition, a substance having a specific gravity that is difficult to be separated by centrifugal force is applied to the separation device 5.
Even if it accumulates inside, it can be discharged out of the system by closing the adjustment valve 13. Although the bottom of the tank 1 is shown as having a flat bottom shape so that the sediment suction port 2 can be moved more smoothly, the movement is controlled by the self-propelled device of the sediment suction port 2. In this case, it is important to keep the flat bottom, but in the case of the present embodiment, it is hung by the moving device 14 and is not pushed but moved by dragging.
Even if there is a gutter-shaped uneven surface or an inclined surface, there is no major problem, and flexible design and operation are possible.

In the fourth embodiment, in order to reliably and smoothly suck the sediment c through the moving sediment suction port 2, the sediment suction port 2 may be clogged with the sediment c. It is desirable to have a mechanism to avoid sticking to the bottom surface of the tank 1 as much as possible.
FIGS. 5A-5E illustrate a preferred embodiment thereof. That is, the sediment suction port 2 is provided with a protrusion in the extension direction of the suction pipe, and the protrusion is formed in a shape which does not hinder the passage of an object having a size passing through the suction pipe. To explain the meaning, it is common to see that the strainer is attached to the sediment suction port, but it is a complicated task to clean up by pulling it up from the tank every time it is clogged. In order to maintain the lower part of the apparatus in a maintenance-free manner, it is essential to suck up without clogging anyway. The present inventor conducted various experiments on the shape of the suction port in which clogging is unlikely to occur. As a result, rather than expanding (in a bell mouth shape) or narrowing (in a strainer shape) the passage area of the suction port. It has been found that it is best to make the diameter of the suction pipe substantially equal to the pipe diameter of the suction pipe (in other words, the suction pipe is simply cut into a ring). Further, the sticking phenomenon, which is another problem, can be solved by providing a projection for preventing the sticking phenomenon. Therefore, as a method for simultaneously satisfying the two conditions of clogging prevention and sticking prevention, the embodiment shown in FIG. The shape is as follows. It is needless to say that the shape of the precipitate suction port 2 in the embodiment of FIG. 5 is desirably applied to the first to third embodiments.

In all of the above embodiments, a well-known pump for transporting a muddy substance (for example, a non-clog type pump or a sand pump) can be applied to the sediment transfer pump 4. If it is intended to perform all maintenance and inspections outside the tank 1, a pump provided with self-priming performance may be used, and this is also well known and will not be described in detail.
Alternatively or as a supplement, it is of course possible to provide a submersible pump for raising the liquid in the vicinity of the sediment suction port 2 (although the number of maintenance and inspection elements is increased). As the fluid pressure pump 11, a pump of the same type as the sediment transfer pump 4 may be used. However, since the properties of the fluid to be handled are low in sediment concentration, a well-known slurry-compatible pump may be sufficient. . As for the separation device 5, in each embodiment, the type using the centrifugal force accompanying the rotational flow of the fluid itself has been exemplified. However, other types, for example, those having a power for forcibly generating the rotational flow, It is needless to say that a filtration-separation type having a screen and the like can be applied. It is desirable to provide the regulating valves 12 and 13 in operation and maintenance management, but they may be omitted if pipeline conditions and the like can be determined in advance. Further, as the type of the valve, a general on-off valve (for example, a butterfly valve, a gate valve, a lift valve, a pinch valve, etc.) can be applied.

The number of each component of the present invention including the sediment suction port 2, the sediment suction pipe 3, the fluid pressure feeding pipe 8, the ejection hole 9, the gutter-shaped uneven surface is determined by the volume of the tank 1. The number may be an appropriate number in consideration of conditions such as the above, and their shapes and arrangement directions can be changed in design according to the local situation, and are not limited to the above embodiment. For example, the inlet channel a of the tank 1
Or when the outlet channel b is provided at a location other than the end of the tank 1 or when the flow rate of the passing fluid d in the tank 1 is extremely low, the sediment suction port 2 is provided at the bottom center of the tank 1. There is also a method in which a fluid pressure feeding pipeline 8 having a gutter groove-shaped uneven surface and an ejection hole 9 is radially arranged therefrom. The gutter groove-shaped uneven surface may be a combination of curved surfaces in addition to the combination of planes described in each drawing. The ejection holes 9 may be formed in a slit shape or a nozzle shape or may be selected as appropriate in addition to the method of simply forming the ejection holes 9 in the fluid pressure feeding pipeline 8. In each embodiment, any one of them may be used alone, or some of them may be used in combination. The operation and operation of the pumps 4 and 11 and the adjustment valves 12 and 13 in the present invention are well-known detection devices and control devices such as automatic operation according to the liquid level of the tank 1 and automatic operation periodically. Of course, it is also possible to automate in combination with. The material of the apparatus and members of the present invention is not limited, and a material suitable for local specifications may be appropriately selected. In addition, over the devices and members of the present invention, the incorporation of the prior art does not hinder at all,
Further, various design changes can be made within the scope of the present invention, and the present invention is not limited to the above embodiments.

[0015]

The sediment discharge device according to the present invention is based on a method of discharging sediment deposited at a fluid stagnation point by pumping the sediment from a sediment suction port without using a mechanical method. The sediment is blown toward the sediment suction port, a separation device or filtration device is installed to separate and generate the jetting fluid from the sediment, the jetting fluid is separately introduced, and the pressure of the jet flow is sufficiently increased. A gutter-like concave-convex surface is provided at the bottom of the fluid retention point to efficiently perform the blowing and collection of the sediment by the jet flow, or a moving device that optionally moves the sediment suction port itself. In addition, the sediment suction port is formed in a shape to prevent clogging and sticking at the time of suction of the sediment, thereby achieving easy and efficient sediment collection and discharge work. It is. In addition to being capable of automatic operation, the equipment installed below the liquid level is maintenance-free, so the burden of maintenance and cleaning of the equipment is greatly reduced, and it is easy to reduce the size and size. Can be implemented
In addition, the simple configuration is very economical in equipment and management costs, and the implementation effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a perspective perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective perspective view showing a second embodiment of the present invention.

FIG. 3 is an overhead perspective view showing a third embodiment of the present invention.

FIG. 4 is a perspective overhead view showing a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing an embodiment of a precipitate suction port of the present invention.

[Explanation of symbols]

1 ... tank 2 ... sediment suction port 3 ... sediment suction line
DESCRIPTION OF SYMBOLS 4 ... Sediment transfer pump 5 ... Separation device 6 ... Sediment discharge port 7 ... Fluid discharge port 8 ... Fluid pressure feed line 9 ... Ejection hole 10 ... Fluid inlet 11 ... Fluid pressure feed pump 12 ... Regulatory valve 13 ... Regulatory valve 14 … Moving device 15… filtration device a… inlet channel b… outlet channel c… sediment d…
Passing fluid

Claims (8)

[Claims] 1. An apparatus for discharging sediment installed at a fluid retention point, comprising: a sediment suction line having a sediment suction port opened near a sediment; and a sediment suction line connected to the sediment suction line. A sediment transfer pump for transferring sediment, connected to the downstream side of the sediment transfer pump, separating the sediment, and discharging a sediment-rich fluid from the sediment discharge port through the sediment discharge port; A separating device for discharging a fluid from the fluid discharge port, and a fluid pumping device connected to the fluid discharge port and having an ejection hole in a direction in which the sediment at the fluid stagnation point is blown toward the sediment suction port. A sediment discharge device comprising a pipe line. 2. The sediment discharge apparatus according to claim 1, wherein a fluid pressure pump is provided in the fluid pressure line. 3. A sediment suction line having a sediment suction port opened in the vicinity of the sediment, the sediment suction line being connected to the sediment suction line. A sediment transfer pump for transferring and discharging the sediment; a fluid pump for pumping a fluid separately introduced from a place different from the sediment suction port; and a fluid pump connected to a downstream side of the fluid pump and the fluid A sediment discharging device, comprising: a fluid pressure feed pipe provided with an ejection hole in a direction in which the sediment at the stagnation point is blown toward the sediment suction port. 4. An apparatus for discharging sediment installed at a fluid retention point, comprising: a flexible sediment suction pipe having a sediment suction port movable in each direction by a moving device; A sediment transfer pump that is connected to the sediment suction line and transfers sediment; and is connected downstream of the sediment transfer pump to separate the sediment and to discharge a sediment-rich fluid to the sediment discharge port. A separation device for discharging a fluid having a low concentration of sediment from the fluid discharge port, and a flow path for returning the fluid discharged from the fluid discharge port to the fluid retaining portion. Object discharging device. 5. The sedimentation device has an inlet in a tangential direction of a peripheral wall surface of a cylindrical container, and discharges a fluid having a high concentration of sediment in a tangential direction of the peripheral wall surface along a flow direction in the container. 5. The sediment discharging device according to claim 1, further comprising a material discharge port, and further comprising a fluid discharge port for discharging a fluid having a low sediment concentration to the container upper lid. . 6. The sediment discharge device according to claim 5, wherein a filtration device is further provided downstream of the fluid discharge port of the separation device. 7. A bottom portion of the fluid retaining portion is formed with a gutter-like concave-convex surface.
The sediment discharging device according to any one of the above. 8. The sediment suction port is provided with a protrusion in the direction of extension of the suction pipe, and the protrusion is formed in a shape that does not hinder the passage of an object having a size passing through the suction pipe. The sediment discharge device according to any one of claims 1 to 7, characterized in that: