JPH05337500A - Dehydrating bag and sludge treatment by using the same - Google Patents

Abstract

PURPOSE:To provide the dehydrating bag which can repetitively be used and the method which can easily and inexpensively treat sludge with good workability by using this dehydrating bag. CONSTITUTION:This dehydrating bag 1 is formed of nonwoven fabric 1A which has good water passability and does not allow the passage of solids to a tubular shape. The apertures at both ends are circumferentially provided with attachable and detachable fixing parts 2, 3. One end of the dehydrating bag 1 is folded back and the fixing part is hung down. The sludge is poured into the folded back part of the dehydrating bag 1 and the dehydrating bag 1 is turned upside down. The other end of the dehydrating bag 1 is fixed and the sludge is subjected in this state to a dehydration treatment. The other end of the dehydrating bag 1 is opened, upon ending of the dehydration treatment, to discharge the dehydrated sludge to the outside of the bag 1. Then, the dehydrating bag 1 is not discarded together with the sludge and the alternate use of both the front and rear surfaces thereof is possible and, therefore, the clogging of the dehydrating bag 1 by the adhesion of the sludge thereto is prevented. The dehydration treatment is inexpensively executed by repetitively using the dehydrating bag 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydration bag used for sludge treatment and a sludge treatment method using the dehydration bag.

[0002]

2. Description of the Related Art Among what are generally called sludge,
There are sludge accumulated at the bottom of sewage channels, rivers, ponds, sea, etc., construction sludge generated by underground construction, sludge generated at factories and sewage treatment plants, etc.To treat these sludges, first,
Dehydration treatment to remove water contained in sludge is essential.

By the way, conventionally, as a dehydration treatment method,
Pour the sludge into a dehydration bag made of non-woven fabric to dehydrate it, and then discard the sludge together with the dehydration bag after completion of the dehydration process, or put the dehydration bag made of non-woven fabric in the mold and pour the sludge into this dehydration bag to dehydrate. After the treatment, and after completion of the dehydration treatment, the mold was turned upside down and only the sludge was discharged.

[0004]

However, in the former method, the cost is high because the sludge is discarded together with the expensive dehydration bag, and in the latter method, the work of transporting and setting the formwork is difficult, and further dehydration is required. There is a problem that the dehydration bag cannot be used repeatedly as many times as the sludge adheres to only one side (inner side) of the bag.

The present invention has been made in view of the above problems, and an object thereof is to provide a dehydration bag that can be repeatedly used.

Another object of the present invention is to provide a sludge treatment method using the above-mentioned dehydration bag, which can be easily and inexpensively processed with good workability.

[0007]

In order to achieve the above object, the first invention is that a dehydration bag is made of a flexible material having good water permeability and impermeable to solids, and is tubular, and can be attached to and detached from the openings of both ends thereof. It is characterized in that a fixed part is provided.

The sludge treatment method according to the second aspect of the present invention is formed of a flexible material that has good water permeability and does not allow solids to pass therethrough, and is formed into a tubular shape. One end of the dehydration bag is folded back and the fixing part is hung, and the sludge is poured into the folded part of the dehydration bag to reverse the dehydration bag, and the sludge is dehydrated while the other end of the dehydration bag is fixed with a stopper. After the completion of the dehydration process, the stopper on the other end of the dehydration bag is removed to open the other end of the dehydration bag, and the dehydrated sludge is discharged to the outside of the dehydration bag.

Further, the sludge processing method according to the third invention is
One end of a dehydration bag, which is made of a flexible material that has good water permeability and is impermeable to solids and which is provided with detachable fixing portions around the openings of both ends thereof, is folded back and the fixing portion is suspended. Pour sludge into the folded portion of the dehydration bag to reverse the dehydration bag, seal both ends of the dehydration bag with the other end of the dehydration bag fixed by stoppers, remove the dehydration bag and stack it for dehydration. After the treatment and the dehydration treatment, the dehydration bag is suspended again to open the lower end portion thereof, and the dehydrated sludge is discharged to the outside of the dehydration bag.

[0010]

According to the method of the present invention, the dehydration bag is not discarded together with the sludge, and both the front and back sides can be used alternately, so that the dehydration bag is not clogged due to the adhesion of the sludge. By repeatedly using the dehydration bag, sludge treatment can be performed at low cost.

Further, in the method of the present invention, since a mold as in the prior art is not used, there is no need to carry and install the mold, and sludge treatment can be performed easily and easily.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a dehydration bag 1 according to the present invention. The dehydration bag 1 is formed into a tubular shape by stitching together a non-woven fabric 1A having good water permeability and impermeable to solids, and openings at the upper and lower ends thereof. The periphery is folded back to form the fixing portions 2 and 3 having a double structure, and each fixing portion 2 and 3 has a plurality of fixing holes 2.
a and 3a are formed. As the material of the non-woven fabric 1A, high strength polyester, acrylic, nylon,
Although polypropylene or the like is used, the dehydration bag 1 may be made of woven cloth or reinforced non-woven cloth.

Next, a sludge treatment method (second invention) using the dehydration bag 1 will be described with reference to FIGS. 2 to 6.
2 to 6 are explanatory views showing the sludge treatment method according to the second invention in the order of steps thereof.

First, as shown in FIG. 2, an S-shaped hook 4 is passed through each fixing hole 3a of one end fixing portion 3 of the dehydration bag 1,
One end of the dehydration bag 1 is fixed to four hangers 5 via a plurality of hooks 4. The four hangers 5 are assembled in a rectangular frame shape and supported horizontally (see FIG. 4).

On the other hand, the other end fixing portion 2 of the dehydration bag 1 is squeezed,
2 extends upward through two hangers 6 that are long and arranged horizontally in the direction perpendicular to the plane of FIG. 2. A ring-shaped stopper 7 and a pulling rope 8 are attached to the fixed portion 2, and the pulling rope 8 is It extends through the inside of the dehydration bag 1 and below the dehydration bag 1.

Next, as shown in FIG. 3, one end side (fixing part 3 side) of the dehydration bag 1 is folded back, and the sludge 10 containing water is poured into the folded back portion from the hose 9.
At this time, a polymer flocculant may be mixed in the sludge 10.

Then, the dehydrating bag 1 extends downward while sequentially reversing due to the weight of the sludge 10, and when the stopper 7 engages with the hanger 6 as shown in FIG. 4, the reversing of the dehydrating bag 1 is stopped and the dehydrating bag 1 is stopped. 1 is suspended on the hangers 5 and 6 with the sludge 10 accommodated therein. When the state shown in FIG. 4 is maintained, the sludge 10 contained in the dehydration bag 1 is
Since only the water is discharged through the nonwoven fabric 1A of the dehydration bag 1, the sludge 10 is dehydrated.

When the above dehydration process is completed, the process shown in FIG.
As shown in, the stopper 7 is disengaged from the hanger 6, the one end fixing portion 2 of the dehydration bag 1 is suspended by the hanger 5, and the dehydration bag 1 is entirely lifted upward.
The tow rope 8 is pulled downward. Then, the folded part of the dehydration bag 1 is inverted and extends downward, and the lower part of the dehydration bag 1 is opened as shown in FIG. 6, so that the dehydrated sludge 10 is removed from the dehydration bag 1 by its own weight. It is discharged and falls to the ground.

Although a series of sludge treatment is completed in this way, in order to continue the sludge treatment, the fixing portion 2 on the opposite side of the dehydration bag 1 from the state shown in FIG. 6 is hooked by the hook 4 in the same manner as shown in FIG. It is fixed to the hanger 5 using, and the stopper 7 and the tow rope 8 are attached to the fixing portion 3 on the opposite side.
If the same operation as shown in FIG. 6 is repeated, the sludge process is performed as described above. In this case, when the dehydration bag 1 is used inside out and the sludge process is repeated in the same manner thereafter, the dehydration bag 1 is alternately used on its front side and back side, so that the sludge 10 is attached to only one side of the dehydration bag 1. Since the dehydration bag 1 will not be clogged by clinging to it and the dehydration bag 1 will not be discarded together with the sludge 10, the dehydration bag 1 can be repeatedly used to perform sludge treatment at low cost. it can.

Further, in the method of the present invention, since a mold as in the prior art is not used, there is no need to carry or install the mold, and sludge can be processed easily and easily.

Next, a sludge processing method according to the third invention will be described with reference to FIGS. 7 to 9. 7 to 9 are explanatory views showing the steps in the middle of the method of the third invention in the order thereof.

In the method of the present invention, the same method is adopted until the procedure shown in FIGS. 2 and 3 in the second invention,
The following methods are used to promote dehydration.

That is, when the sludge 10 is poured from the hose 9 into the dehydration bag 1 as shown in FIG. 7, both ends of the dehydration bag 1 are bound by the ropes 11 and sealed as shown in FIG. After that, the dehydration bag 1 and the sludge 10 together with the hanger 5,
6, and a plurality of them are stacked high as shown in FIG. Then, the sludge 10 in the dehydration bag 1 receives a large compressive force due to the weight of the other sludges 10, so that dehydration from the sludge 10 is promoted.

When the dehydration process is completed, the second
Similar to the invention, the dehydrated sludge 10 is discharged from the dehydration bag 1 in the procedure shown in FIGS. 5 and 6.

Thus, in the third invention, the same effect as that obtained in the second invention can be obtained, but in the third invention, dehydration is promoted as described above, so that the sludge treatment is short. The effect is that it is done efficiently in time. ..

[0027]

As is apparent from the above description, according to the present invention, the dehydration bag is not discarded together with the sludge, and both the front and back surfaces thereof can be used alternately. The effect that clogging due to adhesion does not occur and sludge treatment can be performed inexpensively by repeatedly using the dehydration bag is obtained.

Further, according to the present invention, since the conventional mold is not used, there is no need to carry and install the mold, and the sludge treatment can be performed easily and easily.

[Brief description of drawings]

FIG. 1 is a perspective view of a dehydration bag according to the present invention.

FIG. 2 is an explanatory view showing a sludge processing method according to a second invention in the order of steps thereof.

FIG. 3 is an explanatory view showing a sludge processing method according to a second invention in the order of steps thereof.

FIG. 4 is an explanatory view showing a sludge processing method according to a second invention in the order of steps thereof.

FIG. 5 is an explanatory view showing a sludge processing method according to a second invention in the order of steps thereof.

FIG. 6 is an explanatory view showing a sludge processing method according to a second invention in the order of steps thereof.

FIG. 7 is an explanatory view showing the steps in the middle of the method of the third invention in the order thereof.

FIG. 8 is an explanatory view showing the steps in the middle of the method of the third invention in the order thereof.

FIG. 9 is an explanatory view showing the steps in the middle of the method of the third invention in the order thereof.

[Explanation of symbols] 1 dehydration bag 2,3 fixing part 4 hook 5,6 hanger 7 stopper 8 tow rope 9 hose 10 sludge

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 592008538 Towa Sangyo Co., Ltd. 1610-64, Kamisomata, Oita City, Oita Prefecture (72) Inventor Shigeru Endo 1431 Tomita, Iwai City, Ibaraki Prefecture In the Get Co., Ltd. (72) Inventor Hideo Sudo 3-11-11 Nihonbashi, Chuo-ku, Tokyo Mitsubishi Construction Co., Ltd., Tokyo Civil Engineering Branch (72) Inventor Yasuhiro Yokoshima 175-3 Shinoyama, Ishishita-cho, Yuki-gun, Ibaraki Yokoshima Co., Ltd. (72) Inventor Hiroyuki Aoki 4 Stock Company All at 1-194, Hayashi, Tokorozawa, Saitama Prefecture (72) Inventor Junichi Sato 1610-64 Kamisokata, Oita City, Oita Prefecture Howa Sangyo Co., Ltd.

Claims (3)

[Claims] 1. A dehydration bag, which is made of a flexible material that has good water permeability and does not allow solids to pass therethrough, and is provided with detachable fixing portions around the openings at both ends thereof. 2. A dehydrating bag, which is made of a flexible material that has good water permeability and does not allow solids to pass therethrough and which is provided with detachable fixing portions around the openings at both ends thereof, is folded back at one end thereof. The dehydration bag is hung down, the sludge is poured into the folded portion of the dehydration bag to reverse the dehydration bag, and the sludge is dehydrated while the other end of the dehydration bag is fixed with a stopper, and the other end of the dehydration bag after completion of the dehydration process. And removing the stopper of the dehydration bag to open the other end of the dehydration bag so that the dehydrated sludge is discharged to the outside of the dehydration bag. 3. A dehydrating bag, which is made of a flexible material that has good water permeability and does not allow solids to pass therethrough, and is provided with detachable fixing portions around the openings at both ends thereof, is folded back at one end thereof. , The sludge is poured into the folded-back portion of the dehydration bag to reverse the dehydration bag, and after the other end of the dehydration bag is fixed with a stopper, both ends of the dehydration bag are sealed, and then the dehydration bag is removed. A method for treating sludge, characterized in that the dehydrated sludge is piled up and dehydrated, and after the dehydration treatment is finished, the dehydration bag is hung again to open the lower end portion thereof and the dehydrated sludge is discharged to the outside of the dehydration bag.