JPS62132000A - Sludge treatment - Google Patents

Abstract

PURPOSE:To enable the successive discharge of sludge and the sufficient mixing of the sludge and a solidificating material to be carried out, by inserting the inlet opening of the first jet pump to a sludge layer so as to absorb sludge, next discharging the absorbed sludge into a settling tank by the second jet pump in which the mixed liquid of water and a solidificating material is used for a driving fluid. CONSTITUTION:The discharge opening of the first jet pump 1 is connected with a carrying pipe, the discharge opening of this carrying pipe is opened into a settling tank 3, an equipment in which the second jet pump 2 is intervened in the middle of the carrying pipe is utilized. And the inlet opening of the first jet pump 1 is inserted to a sludge layer so as to absorb sludge 12, net the absorbed sludge is discharged into the settling tank 3 by the second jet pump 2. Thus, the second jet pump 2 uses the mixed liquid of water 4 and a solidificating material 5 for a driving fluid as well as the sludge can be discharged successively from a river bed by the jet pumps, so that the sludge 12 and the driving fluid are mixed powerfully each other in the carrying pipe, and the sludge 12 and the solidificating material 5 can be sedimented to the settling tank 3 in a sufficiently mixed condition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mud treatment method for pumping up mud accumulated in a riverbed or the like and treating it as slurry.

(Conventional technology) Conventionally, when processing mud from riverbeds, etc., the mud was transported outside using buckets and transferred to a sedimentation tank, and then mixed with solidification material in the sedimentation tank and processed in a slurry plant. Ta.

However, with such a treatment method, the efficiency of transport is poor because each packet is transported out one by one, and when mixing the solidification material and mud in the settling tank, the entire mud in the settling tank must be stirred, so it is not possible to mix the solidification material and mud sufficiently. There was a problem that it could not be mixed.

(Problems to be Solved by the Invention) The present invention has been made in view of the above points, and its purpose is to be able to continuously carry out mud from the riverbed, and to solidify the mud. The object of the present invention is to provide a mud processing method that allows sufficient mixing of materials.

(Means for Solving the Problems) The gist of the present invention is to connect a conveyor pipe to the discharge port of the first jet pump 1, open the discharge port of this conveyor pipe into the sedimentation tank, and connect the conveyor pipe to the middle of the conveyor pipe. Using a device with a second jet pump 2 interposed, the suction port of the first jet pump 1 is inserted into the mud layer to suck the mud, and then the second jet pump 2 uses the mixed liquid of water and solidification material as the driving fluid. Suction mud into sedimentation tank 3
This relates to a mud treatment method characterized in that the supernatant water in the sedimentation tank 3 is used as the driving fluid water of the first and second jet pumps 1 and 2 (example). 12 The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows a flowchart of the present invention, in which a conveying pipe is connected to the discharge port of the first diesel pump 1, and the discharge port of this conveying pipe is opened into the sedimentation tank 3, and a second jet is inserted in the middle of the conveying pipe. A pump 2 is involved. The first jet pump 1 is integrally attached to the packet 11 of the mud working vehicle, and when the packet 11 scrapes mud 12, the first jet pump 1
The suction port of the jet pump 1 is inserted into the mud layer to suck the mud 12. On the other hand, water 4 and solidifying material 5 are each weighed by a measuring machine 21 and mixed by a mixer 6, and then this mixed liquid is sent as a driving fluid to the second jet pump 2 by a pressure pump 7, and the second jet pump At step 2, the sucked mud is discharged into the sedimentation tank 3. 8 is an agitator
110 is a high-pressure pump that pumps driving fluid to the first jet pump 1.

Further, the supernatant water in the settling tank 3 is pumped up by a submersible pump 9 and used as driving fluid water for the first and second jet pumps 1.2.

In this way, some water is removed and the solidified mud is sent to a slurry plant and used as improved soil.

The jet pumps used as the first and second jet pumps 1.2 are of a so-called mixed air type in which a driving fluid is surrounded by air, and FIG. 2 shows an example thereof. The connecting portion of the suction pipe 13 and the discharge pipe 14 is expanded in a trumpet shape toward the side of the suction pipe 13 to form an injection chamber 15, and an annular driving fluid introduction passage 16 is provided across the suction pipe 13 of this injection chamber 15. A plurality of nozzles 17 are provided in the drive fluid introduction path 16 at equal intervals in the circumferential direction, and an injection chamber 15 is provided.
A cylindrical body 18 is arranged in the middle part of the cylinder 18 to form an annular air inlet 19 that communicates with the atmosphere. 20 is an air intake port. When the driving fluid I is injected in an annular manner by the plurality of nozzles 17, the driven fluid port is sucked, and the atmosphere is introduced from the air inlet port 19 due to the pressure difference with the atmosphere, surrounding the driven fluid port and filling the injection chamber. 15 can be prevented from cavitation phenomenon.

(Effects) As described above, the present invention connects a transport pipe to the discharge port of the first jet pump, opens the discharge port of this transport pipe into the sedimentation tank, and interposes the second jet pump in the middle of the transport pipe. Using this device, the suction port of the first jet pump is inserted into the mud layer to suction the mud, and then the second shared pump discharges the sucked mud into the sedimentation tank, so the jet pump continuously removes mud from the river bed. Not only can it be carried out quickly, but since the driving fluid is a mixture of water and solidifying material, the mud and driving fluid mix vigorously without the need for a conveying pipe, and as a result, the mud and solidifying material are mixed together. This has the effect that it can be precipitated in a sufficiently mixed state in the settling tank.

Moreover, since the supernatant water in the settling tank is used as the driving fluid water for the first and second jet pumps, there is an effect that the water at the site can be used effectively.

[Brief explanation of drawings]

FIG. 1 is a flowchart of the present invention, and FIG. 2 is a sectional view of a jet pump used in the present invention.

Claims (1)

[Claims] (1) Using a device in which a conveyance pipe is connected to the discharge port of the first jet pump, the discharge port of this conveyance pipe is opened into the sedimentation tank, and a second jet pump is interposed between the conveyance pipes, the first jet The suction port of the pump is inserted into the mud layer to suction the mud, and then the second jet pump discharges the sucked mud into the sedimentation tank using a mixture of water and solidification material as the driving fluid, and the top of the sedimentation tank is A mud treatment method characterized in that clear water is used as driving fluid water for the first and second jet pumps.