JP3149593B2 - Sludge treatment method and sludge treatment plant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention is to provide a treatment plant f mud that allow transport while soil improvement sludge.

[0002]

2. Description of the Related Art In order to treat sludge deposited on the seabed, riverbed, etc., ie, sludge, the sludge is excavated by dredging, and after landing, when the landfill site is separated and approached, the sludge is continuously conveyed by a belt conveyor. In addition, when there is no suitable landfill, land transportation is often performed by dump trucks and the like, and landfilling is often performed.

[0003]

However, since sludge is made of soft soil, it must be transported to a landfill site, especially cement or lime, if it is to be used for the construction of a landfill site. The solidified material must be sludge-stirred and mixed to improve the soil quality, and equipment for mixing and stirring is required, resulting in high disposal costs.

[0004] be one this invention to solve the above problems, its object is to provide a f mud treatment plant to be able to transport while carrying out immediate soil improvement after landing the sludge.

[0005]

[0006]

In order to achieve the above object,
Therefore, the sludge treatment plant of the present invention comprises a hopper for temporarily receiving sludge, a supply pipe connected to a discharge-side end of the hopper, and a mixer having a side connected to a downstream side of the supply pipe. An injection nozzle in the mixer, protruding and arranged perpendicular to the supply pipe, a jet pump connected to the injection nozzle for injecting the improving material, and an extension of the injection nozzle. And a discharge pipe provided downstream of the mixer.

Further, the sludge treatment plant of the present invention comprises a container having an open upper surface, a foreign matter removing screen disposed at the opening of the container, and a longitudinally extending inner bottom of the container. A screw disposed along the feeder, a supply pipe provided at one end of the container at the conveying end of the screw, and a motor at the other end of the container, which rotationally drives the screw. the sludge processing hopper Ru equipped with a door
It is provided .

[0008]

In the treatment plant having the above-mentioned structure, the improving material is injected from the jet pump, so that the improving material is uniformly mixed and stirred into sludge. Further, when the improving material is injected from the injection nozzle, the inside of the mixer becomes negative pressure, and the sludge and the improving material are mixed and transported toward the discharge pipe side. Furthermore, the sludge introduced into the processing hopper is filtered through a screen to remove coarse impurities mixed in the processing hopper, and is stored in the hopper. Conveyed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows the overall configuration of a processing plant according to the present invention. In the figure, the submarine ground E near the land
Sludge 1 deposited on the river is dredged by the grab dredger 2,
Transferred to soil carrier 3 and transported to landing point A,
The bucket 4 transfers the sludge to a hopper 6 constituting a sludge treatment plant 5 installed on land.

A mixer 7 is disposed at an outlet end of the hopper 6, and a discharge pipe 8 is provided downstream of the mixer 7. The discharge pipe 8 is routed to a disposal site 9 adjacent to the treatment plant 5.

Cement milk 11 as an improving material contained in a cement storage tank 10 is supplied to a mixer 7 through a jet pump 12, and the sludge 1 and the cement milk 11 are mixed and stirred at an appropriate ratio by this pumping force. While continuously transporting to the disposal site 9 through the discharge pipe 8,
Used for land reclamation.

FIG. 2 shows the construction of the hopper 6 and the mixer 7 in more detail. In the figure, hopper 6
Is a container part 14 having an open upper surface, a screen 15 for removing foreign substances arranged obliquely on the upper surface of the container part 14, and a stirring and transporting part arranged along the longitudinal direction at the inner bottom of the container part 14. The screw 16 is connected to the supply pipe 17, which is on the transport end side of the screw 16 and is provided outside the one end in the longitudinal direction of the container part 14, and the other end of the screw 16. And a screw drive motor 18 disposed in the section.

Therefore, the hopper 6 is provided by the bucket 4.
When the sludge 1 is put into the inside, coarse impurities in the sludge 1 are filtered according to the size of the mesh of the screen 15, and the filtered sludge is discharged to the lower side of the screen 15. The sludge 1 put into the container part 14 is a screw 1
The mixture 6 is mixed and stirred by the rotation of 6, and the fluidity is temporarily recovered while the moisture content and the viscosity are equalized.

The mixer 7 has a negative pressure generating chamber 19 and a horn-shaped injection pipe 20 which is continuously integrated downstream of the negative pressure generation chamber 19. 8 are connected.

An end of the supply pipe 17 is connected to the negative pressure generating chamber 19 at right angles to the longitudinal direction thereof, and communicates with the inside. Further, an injection nozzle 21 is disposed in the negative pressure generation chamber 19, and a high pressure hose 22 is provided by the jet pump 12.
A negative pressure is generated in the negative pressure generating chamber 19 by injecting the cement milk 11 pumped through the nozzle 21 from the nozzle 21, and the sludge 1 flows to the injection pipe side by the ejection pressure while sucking the sludge 1. The sludge 1 and the cement milk 11 are transported to the disposal site 9 through the discharge pipe 8 while being sufficiently mixed and agitated, and are used as landfill for ground preparation.

If the distance between the treatment plant 5 and the disposal site 9 is long, a pump for the booster can be provided in the piping. In addition, although it can be applied to truck transportation, in this case, a material having slow hardness may be used as an improving material.

[0018]

[0019]

The present invention has been described in detail with reference to the embodiments.
In the sludge treatment plant according to the present invention,
When the improved material is injected from the injection nozzle, the inside of the mixer becomes negative pressure, and the sludge and the improved material are transported while being mixed and agitated toward the discharge pipe side. Compared to recovering water from sludge or mixing and agitating the improving material in the ground, transport and mixing can be performed at the same time, so the work becomes rational and the processing cost is reduced.

Furthermore, when the mixing and stirring of the sludge and the improving material are not performed by the jet pump, the inside can be washed out by jetting water instead of cement milk, so that cleaning for preventing clogging is easy. is there.

Further, the sludge introduced into the processing hopper of the present invention is supplied while the coarse impurities mixed therein are filtered through a screen and accommodated in the hopper, and mixed therein by the rotation of the screw. Since the sludge is conveyed to the pipe side, the water content and viscosity of the sludge can be made uniform, which is suitable for transportation.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a sludge treatment procedure including a sludge treatment plant according to the present invention.

FIG. 2 is a detailed view of a hopper and a mixer in the processing plant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sludge 5 Sludge treatment plant 6 Hopper 7 Mixer 8 Discharge pipe 9 Disposal site 11 Cement milk (improvement material) 12 Jet pump 14 Container part 15 Screen 16 Screw 17 Supply pipe 18 Screw drive motor 19 Mixing chamber 21 Injection nozzle

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 11/00-11/20

Claims (2)

(57) [Claims] 1. A hopper for temporarily receiving sludge, a supply pipe provided at a discharge end of the hopper, a mixer having a side connected to a downstream side of the supply pipe, and And an injection nozzle protrudingly arranged orthogonal to the supply pipe, a jet pump connected to the injection nozzle to inject the improving material, and on an extension of the injection nozzle and downstream of the mixer. A sludge treatment plant comprising: a discharge pipe provided. 2. A container having an open upper surface, a foreign matter removing screen disposed at an opening of the container, a screw disposed along an inner bottom of the container along a longitudinal direction, and a conveying end of the screw. And a sludge treatment hopper provided with a supply pipe provided on one end side of the container portion and a motor on the other end side of the container portion for rotating the screw. The sludge treatment plant according to claim 1 .