JPH0421768B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dewatering method for easily dewatering hydrated soil.

[Conventional technology and problems]

For example, when excavated soil is treated in civil engineering work, etc., in rivers or in urban areas, it is often muddy water containing harmful substances and a large amount of water.

The conventional treatment method for reusing muddy soil, which is subject to construction industry waste, is to collect the soil in its muddy state and transport it to a treatment plant in another location. Then, they are dehydrated.

However, the method of transporting muddy water to a treatment plant for treatment is extremely inefficient and has the problem of high processing costs for reuse.

In addition, as a dehydrator used for soil dewatering treatment,
Compression and centrifugal force types have been proposed in the past, but soil is composed of various mixtures, and due to the existence of gaps between soil particles and mixtures, it is difficult to simply apply compressive force or centrifugal force. Poor dehydration efficiency
For this reason, the structure of the dehydrator becomes large, making it unsuitable for on-site treatment and requiring the use of a solidifying agent.

This invention was made in view of the above-mentioned points, and allows dehydration treatment of hydrated soil to be performed on-site, greatly reducing the cost of reusing hydrated soil, as well as making it possible to recover and recover dehydrated water. The purpose is to provide a method for treating hydrated soil that can be easily reused.

[Means for solving problems]

In order to achieve the above objects, the present invention provides a container-like transport body that stores and moves hydrated soil, and a filter for separating water is provided inside the transport body. A moisture ejection pipe communicating with the lower part, a moisture suction pipe communicating with the upper part of the filter in the transfer body, and a compressed air supply pipe communicating with the transfer body are connected, and vibration is applied to the transfer body to vibrate the filter from the outside. A applying mechanism is attached, and a presser cover for pressurizing the hydrated soil is placed in the upper opening of the transfer body, and complex energy such as pressure, vibration, and air is applied to the hydrated soil stored in the transfer body, and air is blown into the hydrated soil. This method employs a method of dewatering while separating soil content and moisture.

[Effect]

After storing the hydrated soil in the transporter, if combined energy such as pressurization, vibration, and air injection is applied to the hydrated soil, the air will improve the separation effect of water and soil components, and the internal pressure will increase and the filter will As a result, water is efficiently separated from the soil components, and the water gushes out to the outside of the transfer body, leaving dehydrated soil on the filter, allowing it to be piled up in the open, allowing for transport and reuse, and the dehydrated water. can be collected and used effectively.

〔Example〕

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

Figures 1 and 2 show a first example in which a bucket 2 of a power shovel 1 is used as a container-like transport body for storing and transporting hydrated soil.
is attached to the tip of the arm 3 so as to swing by a cylinder 4.

A water-permeable separation filter 5 is provided inside the bucket 2, and the water in the scooped hydrated soil is separated downward and discharged from a drain port 6 provided at the bottom of the bucket 2.

A presser lid 7 is attached to the tip of the arm 3, which can open and close the upper opening of the bucket 2 when the bucket 2 is in the soil transfer position as shown in Fig. After that, the presser lid 7 is pressed down with the cylinder 8, and the stored soil is dehydrated under pressure.

In order to improve dewatering efficiency, the bucket 2 includes a compressed air supply pipe 9 that separates soil components and water and simultaneously blows out the water, and a suction pipe 10 that can be opened and closed to naturally drain the water from the scooped hydrated soil. , a vibration applying mechanism 11 that applies vibration to the filter 5 to prevent clogging, and a spout pipe 12 that guides water from the drain port 6 are installed, and the scooped hydrated soil is mechanically and Complex energy such as compression, separation by blowing pressurized air, compression by pressurized air, and vibration is applied to improve dewatering efficiency.

Note that the container-shaped transport body for carrying out the method of treating hydrated soil is not limited to the bucket cart 2 shown in FIGS. It may be something like a crawler loader in which a bucket is attached to the front of the crawler so that it can move up and down, and water-containing soil scooped up by a bucket of a power shovel or the like is stored in the carrier and dehydrated.

FIG. 3 shows a second example of dewatering using a container such as a loading platform, in which a filter 24 is arranged between porous members 22 and 23 provided at the bottom of a container 21 for storing excavated hydrated soil. A blowout pipe 26 is connected to the space 25 provided at the lower part of the lower porous member 23, and a pressurized air supply pipe 27 is connected between the filters 24 to separate soil components and water and to prevent the filters 24 from clogging. A vibration imparting mechanism 28 is connected to the upper porous member 22 for separating soil components and water and for preventing clogging of the filter 24.

A presser lid 29 that fits inside the container 21 is moved up and down by a cylinder 30 to pressurize and dehydrate the hydrated soil, and a moisture suction pipe 31 is connected to the side wall of the container 21 via a filter 32. , the moisture in the hydrated soil put into the container 21 is efficiently discharged.

Check valves 33, 34, and 35 are installed in the ejection pipe 26, the pressurized air supply pipe 27, and the suction pipe 31, respectively, so that each process of ejecting and suctioning compressed air can be performed without any trouble.

The treatment method of this invention is carried out using the dewatering equipment as described above, and in FIGS. 1 and 2, a power shovel 1 is operated and a bucket 2 is
The water-containing soil is scooped up at that position, and with the bucket 2 held in a transfer posture, the presser lid 7 is pushed down to pressurize the water-containing soil in the bucket 2, and the upper layer of water is pushed out from the suction pipe 10. Pressurized air is sent into the bucket 2, which is closed with a presser lid 7, and at the same time, vibration is applied to the filter 5. Furthermore, by suctioning the drain port 6 with a pump, combined energy is applied to the water-containing soil, and the filter 5 dewaters the soil. do.

Water-containing soil is separated from moisture by blowing air into the bucket 2, where the internal pressure has increased, and is efficiently sprayed and dehydrated by the filter 5, leaving the soil remaining in the bucket 2 in a state where it can be piled up in the open. become.

The soil after dewatering can be reused on-site, and the water produced by dewatering is collected in a tank, and water that does not contain harmful substances is reused.

〔effect〕

As described above, according to the present invention, complex kinetic energy such as pressure, vibration, and air is applied to the hydrated soil stored in the container-shaped transfer body to dehydrate it using the filter, so that the hydrated soil can be scooped up and transferred. The dewatering process can be carried out in the process of dewatering, and the soil content and moisture are separated by supplying air into the transport body with increased internal pressure, so the dewatering efficiency is excellent, and the soil can be reused immediately after dewatering. It is possible to significantly improve the efficiency and reduce costs of processing, and furthermore, it is possible to recover and reuse dehydrated water.

[Brief explanation of drawings]

Fig. 1 is a front view showing the embodiment of the treatment method shown in Fig. 1 according to the present invention, Fig. 2 is an enlarged vertical cross-sectional view of the main parts of the same, and Fig. 3 is a longitudinal cross-sectional view showing the second embodiment of the same. It is a front view. 2... Bucket, 5, 24... Filter, 6...
...Drain port, 7, 29... Presser cover, 9, 27... Pressurized air supply pipe, 11, 28... Vibration imparting mechanism,
10, 26... Ejection pipe, 21... Container.

Claims (1)

[Claims] 1. A filter for separating water is provided inside a container-shaped transfer body that stores and moves hydrated soil, and the transfer body includes a water spouting pipe that communicates with a lower part of the filter within the transfer body, and a filter that separates water within the transfer body. A moisture suction pipe that communicates with the upper part of the transfer body is connected to a compressed air supply pipe that communicates with the transfer body, and a vibration imparting mechanism that applies vibrations to the filter from the outside is attached to the transfer body, and a vibration imparting mechanism is installed in the upper opening of the transfer body. A holding lid that pressurizes the water and soil is placed, and combined energy such as pressure, vibration, and air is applied to the hydrated soil stored in this transporter, and the air is blown in to separate soil content and moisture while dewatering. A method for treating hydrated soil characterized by: