JP7756909B2 - Flexible dewatering tub - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies. 1. Exhibition date: December 7-9, 2021. Exhibition name: Manufacturing Support Business Exhibition and Business Meeting "Small and Medium-sized Enterprise New Manufacturing and New Services Exhibition." Venue: Tokyo Big Sight East Hall 7. 2. Website publication date: December 21, 2021. Website address (URL): https://www.hydro-eg.asia/water/appliance-flexible/index.html

The present invention relates to a flexible dewatering tank, and more specifically to a flexible dewatering tank that can be easily assembled at the sludge generation site, is lightweight, and can be easily carried by hand.

Patent Documents 1 and 2 disclose simple water treatment devices that can be assembled on-site. These devices include a sludge dewatering tank that transfers coagulated and settled sludge to a filter cloth using a pump and dewaters it by gravity.
However, this sludge dewatering tank has the drawback that the sludge cannot be dewatered unless the sludge adhering to the surface of the filter cloth is removed.

Patent No. 6829450 Patent No. 6829452 Japanese Patent Application Laid-Open No. 2018-154406

To solve this problem, Patent Document 3 proposes a method for making sludge easier to transport using flexible container bags, but both technologies require a mechanism for transporting the flexible container bags and a pressing mechanism for dewatering, which makes the mechanisms complex and heavy, making them difficult to assemble on-site.

The objective of this invention is to provide a lightweight, flexible dewatering tank that can be easily assembled at the site where sludge is generated, without the need for complex dewatering mechanisms, and that can be easily carried by hand.

Furthermore, other objects of the present invention will become apparent from the following description.

The above problems are solved by the following inventions.
(Claim 1)
a bag-shaped body made of woven or nonwoven fabric capable of discharging dehydrated water through gaps in the weave or mesh;
A flexible container stand is provided, in which one side stand and the other side stand are connected to face each other,
The bag-like body is attached to the flexible container stand by folding it from the inside toward the top of the flexible container stand, then from the top of the flexible container stand toward the outside, and then hanging down the outside of the flexible container stand,
The bottom of the bag-shaped body is placed on a pallet having at least a gap that allows water to pass from top to bottom,
A flexible dewatering tank characterized in that a drainable drainage pool is provided on the outer periphery of the pallet below the flexible container stand to which the bag-shaped body is attached.
(Claim 2)
2. The flexible dewatering tank according to claim 1, wherein the drainage pool is provided with a detachable drainage pump.
(Claim 3)
3. A flexible dewatering tub according to claim 1, wherein the bag-shaped body is made of a woven or nonwoven fabric made of polyethylene or polypropylene.
(Claim 4)
One side stand of the flexible container stand comprises an upper semicircular loop steel pipe and a lower semicircular loop steel pipe, and a plurality of vertical steel pipes are arranged and fixed at predetermined intervals between the upper semicircular loop steel pipe and the lower semicircular loop steel pipe,
The other stand of the flexible container stand is provided with an upper semicircular loop steel pipe and a lower semicircular loop steel pipe, and a plurality of vertical steel pipes are arranged and fixed at predetermined intervals between the upper semicircular loop steel pipe and the lower semicircular loop steel pipe,
4. A flexible dewatering tub according to claim 1, wherein the one side stand and the other side stand are connected to face each other.

The present invention provides a flexible dewatering tank that can be easily assembled at the site where sludge is generated without installing a complex dewatering mechanism, and is lightweight and easily portable. In particular, the present invention provides a flexible dewatering tank that can continuously dewater sludge from the bottom of the flexible container without stopping, by placing the bottom of the bag-shaped body on a pallet with a gap that allows water to pass from top to bottom.

FIG. 1 is a perspective view showing an example of a flexible dewatering tub of the present invention. FIG. 2 is an exploded perspective view of the flexible dewatering tub of FIG. 1 before assembly. Side view showing the state at the start of spin-drying Side view showing the progress of dehydration A side view showing the state where the dehydrated sludge has been removed together with the flexible container after dehydration is complete.

The following describes a preferred embodiment of the present invention with reference to the drawings.

Figure 1 is a perspective view showing an example of a flexible dehydration tub of the present invention, and Figure 2 is an exploded perspective view of the flexible dehydration tub of Figure 1 before assembly.

As shown in Figure 2, the parts to form the flexible dewatering tank 1 are prepared. These parts include a flexible container bag 2, a flexible container stand 3, a pallet 4, a drainage pool 5, and a drainage pump 6.

The flexible container bag 2 is a component used to form the bag-like body 200 shown in Figure 1. The bag-like body 200 is preferably a flexible bag-like body that is able to discharge dehydrated water through the gaps in the woven or mesh. The woven or nonwoven fabric is preferably made of polyethylene or polypropylene.

The flexible bag-shaped body 200 is a filter cloth used to dehydrate sludge, and it is preferable that the filter cloth has gaps (weave, mesh) that allow water to be discharged by the weight of the water column.

The flexible bag-shaped body 200 has gaps, but the size of the gaps is preferably in the range of approximately 0.2 to 0.5 mm.

Reference numeral 3 denotes a flexible container stand for forming a flexible bag-shaped body 200. The flexible container stand 3 is configured by connecting one side stand 3A and the other side stand 3B facing each other.

One side stand 3A has an upper semicircular loop steel pipe 301 and a lower semicircular loop steel pipe 302, and multiple vertical steel pipes 303, 304, 305, 306, and 307 are fixed and arranged at predetermined intervals between the upper semicircular loop steel pipe 301 and the lower semicircular loop steel pipe 302.

The other stand 3B has an upper semicircular loop steel pipe 308 and a lower semicircular loop steel pipe 309, and multiple vertical steel pipes 310, 311, 312, 313, and 314 are fixed and positioned at predetermined intervals between the upper semicircular loop steel pipe 308 and the lower semicircular loop steel pipe 309.

The vertical steel pipes 303 and 310 are secured together, for example with wire, so that they can be opened when necessary. This ability to release them makes it easier to remove the flexible container bag 2. In the present invention, it is preferable that the vertical steel pipes 303 and 310 are secured together with wire, facing each other, and connected in a manner that allows for release.

The outer diameter of the flexible container stand 3 is preferably in the range of 500 to 1500 mm and the height is preferably in the range of 500 to 1500 mm.

For frames and vertical steel pipes, cylindrical steel pipes are preferred from the perspective of lightweight construction, with a diameter of 15 to 18 mm, for example.

A method for attaching a flexible container bag 2 to a flexible container stand 3 as shown in FIG. 1 will be described.
The flexible container stand 3 has a configuration as shown in FIG. 2, and has a bag-shaped portion formed on the inside of the flexible container stand 3 and a folded portion formed on the outside.
That is, the bag-shaped body 200 is attached from the inside of the flexible container stand 3 toward the top. By attaching in this manner, a bag-shaped portion can be formed inside the flexible container stand 3. Then, the bag-shaped body 200 is attached from the top of the flexible container stand 3 toward the outside, and then the outside toward the bottom. This attachment on the outside is the formation of a folded-back portion. In this way, the attachment shown in Figure 1 can be achieved, and a room for dewatering the sludge is formed inside the flexible container stand 3.

The bottom of the bag-shaped body 200 is placed on a pallet 4, which has gaps 400 that allow water to pass from top to bottom. As sludge is placed into the bag-shaped body 200, water is discharged to the outside through the gaps in the filter fabric that makes up the bag-shaped body 200. The water discharged from the bottom of the bag-shaped body 200 passes through the gaps 400, which allow water to pass from top to bottom, and is then discharged into the filtration pool 5.

In the present invention, when the bottom of the bag-shaped body 200 is placed on the pallet 4, there is a risk that the presence of the pallet may prevent the dehydrated water from being discharged to the outside. However, by forming a gap 400 in the pallet 4 that allows water to pass from top to bottom, there is no hindrance to dehydration of the bag-shaped body 200.

It is also preferable that the pallet 4 has a height that prevents the surface of water discharged to the outside through the gaps in the filter fabric from reaching the bottom of the bag-shaped body 200. By ensuring that the pallet 4 has such a height, it is possible to ensure that water is removed from the bag-shaped body 200.

The dewatering pool 5 is not particularly limited, but a collapsible pool is preferred. It can be easily assembled on-site or folded and carried, providing a flexible dewatering tank that is easy to work with on-site.

It is preferable to configure the drainage pool 5 so that the water can be automatically drained by installing a removable drainage pump 6.

Next, the dehydration method will be described.
As shown in Figure 3, the bag-shaped body 200 is set. Specifically, the bag-shaped body 200 is placed on a pallet 4 installed in the center of the filtered water pool 5. There is space below the flexible container stand 3, so the bag-shaped body 200 can protrude downward from this space, and the protruding portion of the bag-shaped body 200 is placed on the pallet 4.

The pallet 4 has gaps 400 formed in it that allow water to pass from top to bottom, so as dewatering progresses, the water discharged from the bag-shaped body passes through the gaps 400 and is stored in the filtered water pool 5.

When the filtered water reaches a certain level, a level sensor (not shown) detects it, the control unit receives the detection signal, and a start signal is sent to the drainage pump 6, which then starts operating and automatically drains the water.

The sludge to be dewatered is placed in the flexible dewatering tank 1. In Figure 3, 100 indicates the sludge surface.

Leaving the container standing will allow the dehydration to proceed. The separated water is automatically drained by the drainage pump 6.

As shown in Figure 4, when the sludge volume is reduced by dehydration, the sludge surface 100 drops. At this stage, the sludge remaining in the bag-shaped body 200 is highly concentrated (low moisture) sludge.

Next, new sludge is placed into the bag 200 to continue dehydration.

By repeating the above dehydration process, the dehydrated sludge accumulates in the bag-shaped body 200 as shown in Figure 5. When the bag-shaped body 200 is full, the flexible container stand 3 is opened and the flexible container sludge is removed using heavy machinery or the like.

Then, by setting a new bag-shaped body 200, you can perform the same dehydration process as above.

The flexible dewatering tank of the present invention can be easily assembled at various sites where sludge is generated without the need for a complex dewatering mechanism, and is lightweight and easily portable, making it easy for anyone to install. It can also be used, for example, as a dewatering tank in a simple wastewater treatment facility.
Furthermore, the flexible dehydration tub before assembly is compact and does not require much storage space.

1: Flexible dewatering tank 100: Sludge surface 2: Flexible container bag 200: Bag-shaped body 3: Flexible container stand 3A: One side stand 3B: Other side stand 301, 302: Semicircular loop steel pipe 303, 304, 305, 306, 307: Vertical steel pipe 308, 309: Semicircular loop steel pipe 310, 311, 312, 313, 314: Vertical steel pipe 4: Pallet 400: Gap 5: Drainage pool 6: Drainage pump

Claims (4)

a bag-shaped body made of woven or nonwoven fabric capable of discharging dehydrated water through gaps in the weave or mesh;
A flexible container stand is provided, in which one side stand and the other side stand are connected to face each other,
The bag-like body is attached to the flexible container stand by folding it from the inside toward the top of the flexible container stand, then from the top of the flexible container stand toward the outside, and then hanging down the outside of the flexible container stand,
The bottom of the bag-shaped body is placed on the upper surface of a pallet having a gap that allows water to pass from the upper surface to the lower surface ,
A drainable drainage pool is provided below the flexible container stand to which the bag-shaped body is attached,
By simply placing the bag-shaped body on the upper surface of the pallet, the sludge in the bag-shaped body is dehydrated without compressing the bag-shaped body from the outside, and the water dehydrated from the bag-shaped body is stored in the drainage pool.
The upper surface of the pallet, on which the bag-shaped body is placed, and the lower surface of the pallet are
A flexible dewatering tank characterized in that the drainage pool is separated by a distance corresponding to the length of a gap that allows water to pass from the upper surface to the lower surface, and the water surface of the drainage pool is at a height that does not reach the bottom of the bag-shaped body placed on the upper surface of the pallet . The flexible dewatering tank described in claim 1, characterized in that the drainage pool is equipped with a removable drainage pump. A flexible dehydration tub as described in claim 1 or 2, characterized in that the bag-shaped body is formed from woven or nonwoven fabric made of polyethylene or polypropylene. One side stand of the flexible container stand comprises an upper semicircular loop steel pipe and a lower semicircular loop steel pipe, and a plurality of vertical steel pipes are arranged and fixed at predetermined intervals between the upper semicircular loop steel pipe and the lower semicircular loop steel pipe,
The other stand of the flexible container stand is provided with an upper semicircular loop steel pipe and a lower semicircular loop steel pipe, and a plurality of vertical steel pipes are arranged and fixed at predetermined intervals between the upper semicircular loop steel pipe and the lower semicircular loop steel pipe,
4. A flexible dewatering tub according to claim 1, wherein the one side stand and the other side stand are connected to face each other.