JP3153900B2 - Simple treatment method for muddy water and portable assembly type simple treatment device. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dewatering muddy water generated in sewerage works and the like, separating the water and residual soil, and a portable assembly type simple processing apparatus.

[0002]

2. Description of the Related Art Conventionally, muddy water generated in a pit, etc. of a sewerage work contains a large amount of water, and has been pumped out by a submersible pump or the like and directly flowed through a sedimentation tank to a drainage channel. In the case of fine sand, there is a problem that it is not preferable from the viewpoint of environmental protection and causes clogging of a drainage channel. Therefore, in recent years, a method and an apparatus for treating muddy water have been developed. Generally, these methods are to put muddy water into a treatment tank, perform chemical treatment or centrifugal treatment, separate the water and mud, and then treat them by cake or coagulation. Is transported to a construction site and installed or assembled for use.

[0003]

However, all of the above-mentioned conventional devices are large-scale devices, and even relatively small devices are 4 m in length, 2 m or more in width and 2 tons or more in weight. For use in sewerage works in residential areas, it is too large to secure an installation space, and it is often difficult to transport to the site through a residential area. Therefore, development of a small and simple muddy water treatment apparatus has been desired.

When muddy water is separated into water and mud by chemical treatment in a treatment tank, it is necessary to sufficiently dissolve the treating agent used for chemical treatment in the muddy water in order to enhance the separation effect.
Conventionally, stirring with a screw or the like is performed. However, this method has a problem that unstirring or melting at a corner takes time. Furthermore, conventionally, what was separated into water and mud by chemical treatment was put into a mesh container by pumping and dewatered, but in this method, water and mud are mixed again when pumping once separated. There was a problem that draining would take time.

SUMMARY OF THE INVENTION In view of the above, the present invention has been made to develop a simple method of separating muddy water that can be used in a narrow place, and furthermore, is small in size, can be easily moved and assembled, and dissolves a processing agent. It is an object of the present invention to develop a device capable of efficiently performing draining after separation and drastically reducing muddy water treatment time.

[0006]

SUMMARY OF THE INVENTION In the method for easily treating muddy water according to the present invention, muddy water is sent to a treatment tank, and air is jetted upward from the bottom of the treatment tank to perform chemical treatment while stirring the muddy water. After the water is discharged, the mud is dropped from the bottom of the treatment tank.

Further, the portable and easy- to -assemble treatment apparatus for muddy water according to the present invention is characterized in that at least a part of the side surface of the treatment tank is made transparent, and an upward air jet nozzle and a discharge port are provided on the bottom surface of the treatment tank.
Furthermore, a means is provided in which a plurality of drain holes are provided in the vertical direction on the side surface of the processing tank.

In the method for treating muddy water according to the present invention, it is important that the chemical treatment in the treatment tank is performed while jetting air upward from the bottom of the treatment tank and stirring the muddy water. Can be completely and rapidly dissolved in muddy water as compared with the conventional one. This injection is performed by injecting compressed air from a nozzle provided upward on the bottom surface of the processing tank. Note that, when air is injected from the bottom of the processing tank at the same time as the processing agent is injected, the dissolution of the processing agent is further accelerated, and the separation of water and mud is promoted.

After separation into water and mud by a treating agent,
By discharging the separated water to the upper part and dropping the mud to the receiving part, it is possible to greatly reduce the time required for draining the water contained in the mud at the receiving part. Also, since the receiving part is below the processing tank,
Since the treated mud in the treatment tank falls naturally only by opening the discharge port formed in the bottom of the treatment tank, no extra equipment such as transfer from the treatment tank to the receiving part is required.

It is important that the portable assembly type simple treatment apparatus for muddy water of the present invention has a structure in which the mud separated in the treatment tank is dropped from an outlet at the bottom of the treatment tank. The transparent portion formed on the side surface of the processing tank is for confirming the separation state of water and mud in the processing tank from the outside, and it is necessary that the transparent section be formed at least large enough to confirm the separation state. Such a transparent portion may be formed partially or entirely in the vertical direction on one side surface of the processing tank, or the entire processing tank may be formed transparent. This transparent portion may be formed of a transparent member such as a vinyl chloride plate, an acrylic plate, or a glass plate.

[0011] In the portable and easy- to -assemble treatment apparatus for muddy water according to the present invention, it is preferable that the air jet nozzle upwardly attached to the bottom surface of the treatment tank is provided with a gap between the center of the bottom surface and the vicinity of the side surface of the treatment tank. . For example, when the bottom surface of the processing tank is rectangular, nozzles may be provided near the center and four corners. With such a nozzle arrangement, an unstirred portion does not occur in the processing tank, and the dissolution of the processing agent can be accelerated.

The bottom of the treatment tank may be formed in a funnel shape toward the discharge port and in an inverted polygonal pyramid shape such as a triangular pyramid, a quadrangular pyramid, and a pentagonal pyramid. Simply opening it allows it to drop into the receiving part. Also,
The outlet is usually formed at the center of the bottom surface, but may be formed close to the side wall of the processing tank.

Preferably, a plurality of drain holes are provided on the side surface of the processing tank in the vertical direction. The drain holes are for discharging water separated by chemical treatment in the treatment tank. The drain holes are attached at predetermined intervals in the vertical direction on the side surface of the treatment tank. Select the drain hole closest to the surface and open its valve to drain the water out.

The receiving part must be water-permeable in order to remove the moisture of the mud dropped from the processing tank and leave it as residual soil. For example, in addition to a conventionally used mesh container, the receiving part is innumerable around and on the bottom surface. A container provided with a drain hole can also be used.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a simplified construction of a muddy water portable assembly type processing apparatus according to the present invention. FIG.
FIG. 1 is a schematic cross-sectional view when a portable assembly type simple treatment device for muddy water of the present invention is used for sewerage works. First, the muddy water 2 flowing into the standing pile 1 is sent into the treatment tank 4 by the submersible pump 3 or the like. The compressed air sent from above is injected upward, and a predetermined amount of the processing agent is injected into the processing tank 4 while stirring the muddy water 2 to be completely dissolved.

Dissolving the processing agent from the transparent part on the side of the processing tank,
After confirming the separation of the water 7 and the mud 8, the water 7 is discharged from the drain hole 9 near the separation boundary, and the mud 8 is dropped from the discharge port 10 of the treatment tank into the mesh container 11. Then, the water is further drained to make the remaining soil, and is discarded to a treatment plant. Here, a vacuum may be used when draining the separated water.

[0017] The method for easily treating muddy residual soil of the present invention and its portability
In the assembly type simple processing apparatus, the compressed air injected upward from the bottom of the processing tank not only agitates muddy water but also accelerates dissolution of the processing agent. Further, since there is a receiving portion below the processing tank, the mud in the processing tank is sent to the receiving portion only by opening the discharge port, and naturally falls into the receiving portion, so that no device such as transfer is required. Furthermore, since the side surface of the treatment tank is transparent and the dissolution of the treatment agent in the treatment tank and the state of separation of water and mud can be checked from outside, the optimal time for draining water and dropping the mud to the receiving part is set. You can easily find out.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Muddy water was treated at a deposition site by using the portable assembly type simple treatment apparatus of the present invention shown in FIG. The treatment tank used was a transparent vinyl chloride resin plate having a thickness of 10 mm, and was formed in a box shape having a length of 800, a width of 800 and a height of 1000 mm, and was formed in a funnel shape toward a drain at the center of the bottom. An upward air jet nozzle was provided at the center and inside 2 cm from the four corners.

This treatment tank was attached to the upper part of four columns having a height of 2000 mm, and a net-like container was arranged below the lower drain port. The muddy water accumulated in the standing pile is sent to the treatment tank by a submersible pump, and the treatment agent “Katamaru A (separating agent)” (trade name) and “Katamaru B ( Flocculant) ”[trade name]. The above treatment agent is 1 m of residual soil
One liter of Katamaru A and 5 liters of Katamaru B were used per ^three .

Next, the compressed air (air discharge amount: 180 l / min) sent from the compressor 6 is jetted upward from the nozzles 5 and 5 on the bottom surface of the processing tank into the processing tank and stirred to agitate the processing agent. Was dissolved, the state of separation of water and mud in the processing tank was confirmed from the transparent side plate of the processing tank, water was discharged from the drain hole 9, and then the mud was dropped into the net-like container to drain water. The time required for the above treatment was about 30 minutes.

[0021]

[Comparative Example] For comparison, the chemical treatment in the treatment tank was agitated with a conventionally used screw using the apparatus used in the example, separated into water and mud, and then left as it is. When the water was drained in the mesh container used in the examples, the time required for the entire treatment was about 60 minutes.

[0022]

As described above, the method for easily treating muddy water and the portable assembly according to the present invention.
According to the vertical simple processing apparatus, it is small, easy to move and assemble, and can easily perform muddy water in a narrow place. In addition, the dissolving of the treating agent by air stirring is fast, and the water after separation is discharged and the mud is sent to the receiving portion, so that the water contained in the mud is quickly drained at the receiving portion. As a result, the muddy water treatment time can be significantly reduced as a whole.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a use state of a portable assembly simple treatment apparatus for muddy water of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stand pile 10 Discharge port 2 Muddy water 11 Reticulated vessel 3 Submersible pump 4 Processing tank 5 Nozzle 6 Compressor 7 Water 8 Mud 9 Drainage hole

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-313400 (JP, A) JP-A-5-192512 (JP, A) JP-A-7-21102 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) C02F 1/52 B01D 21/01-21/34

Claims (2)

(57) [Claims] 1. Mud water is sent to a treatment tank, air is jetted upward from the bottom of the treatment tank, chemical treatment is performed while stirring the mud water, water and mud are separated, and the water is discharged. A simple method for treating muddy water, which is dropped from the bottom of the treatment tank. 2. A processing tank having at least a portion of a side surface that is transparent, and a tip of a bottom surface of the processing tank formed in a funnel shape or an inverted polygonal pyramid shape serving as a discharge port, and an upward air jet nozzle is provided on the bottom surface. Are provided at multiple locations, and the side of the processing tank
, Wherein a plurality of drainage holes are provided in a vertical direction, and the muddy water is easily assembled and transported.