JPH04187299A - Treatment of muddy water of the like and device therefor - Google Patents

Abstract

PURPOSE:To treat muddy water in such a manner that the muddy water can be reutilized as a resource material for lands to be reclaimed, etc., by separating rocks, gravel, etc., from the muddy water dredged from a water bottom, then mixing the muddy water with a solidifying agent and press feeding this mixture through a pipe from a dredger to a destination. CONSTITUTION:The earth and sand, muddy water 3, etc., of the water bottom are dredged by a dredging means 8 and are loaded onto the dredger 1. The muddy water 3, etc., are thereafter separated from solids, such as rocks and gravel, by vibration screens 10, 18 provided on the dredger 1. This muddy water 3 is dropped into an agitating tank 20 where the muddy water is sent by a rotating agitation rotor 21 to a muddy water treating device 23. This muddy water 3 is mixed with the solidifying agent sent from a solidifying agent supplying device 27 in the muddy water treating device 23. The muddy water mixed with the solidifying agent is press-fed by a high- pressure pump 35 to the destination via a transfer pipe 34 and a press feed pipe 49. Consequently, the muddy water which is dug up and is sent to a site is so treated that the muddy water can be reutilized as the resource material for the lands to be reclaimed or as other civil engineering materials and construction materials.

Description

[Detailed description of the invention] [Industrial use rf! F] The present invention relates to a method and apparatus for treating mud such as sand and mud in lakes, rivers, ports, etc.

[Prior Art] A dredging method is conventionally known as a method of dredging the muddy soil of a port or a river or digging the bottom of the water. This dredging method is 3
It is roughly divided into two types, and the appropriate method is determined depending on the soil quality. General dredging does not involve crushing rocks and uses a general dredger and accounts for the majority of dredging work. These dredgers include a pump boat that sucks up sand and mud along with water and sends it to the destination using pipes floating on the water, a day plow boat that scrapes up sand and mud with the tip of a shovel, and many baguettes lined up in a chain. There are two known types of boats: the get boat, which uses the upper end of a rudder to scoop up dirt and mud one after another into a mud tank, and the grab boat, which uses a grab to grab dirt and mud. Other known dredging methods include pre-crushing dredging and blasting dredging.

[Problem to be solved by the invention] - Generally, when dredging polluted soil from the bottom of a port or river, as mentioned above, the soil and mud are sucked up along with water by a vacuum installed on a dredger and transported to the destination through a pipe. However, with a ratio of 10 parts water to 171 parts water, 10 times more water than the sludge is being sucked up at the same time, making suction dredging difficult.
There is a problem that equipment efficiency is poor because it requires large-scale equipment such as jars. In addition, in non-seaworthy baguette boats and club boats that scoop up and pick up sand and mud, the dirt and mud are transported to the soil carrier with a number attached to its side. There is a problem in that the earth, sand, mud, etc. must be transported to the destination or a port near the destination, which increases transportation costs.

Furthermore, when using excavated earth, mud, etc. for reclamation, mud generally contains a large amount of water at -3=, so it is less efficient at solidifying the ground for reclamation.
Furthermore, it was difficult to reuse it as civil engineering or construction material.

Therefore, in order to improve the solidification efficiency of the mud, it is possible to install a treatment facility at the landfill site that separates water from the mud and makes it easier to solidify the mud. Setting up a facility is likely to be subject to site constraints, and in cases where the reclaimed land is located in the same lake, river, port, etc. as the dredging site, a treatment facility is purposely built on land near the reclaimed site to remove mud. Once transported to the above-mentioned land-based processing facility and treated, it must be transported to a landfill site such as a lake, river, two ports, etc., which inevitably increases the transportation cost. There is a problem that the efficiency of the equipment is inferior.

The present invention is intended to solve the above-mentioned problems, and its first purpose is to make it possible to reuse the mud dug up and sent to the site as a material for landfill or other purposes, or as other civil engineering and construction materials. An object of the present invention is to provide a method and apparatus for the treatment. The second purpose is to reduce the cost of transporting dug mud, and to provide a treatment method and device that does not require installation of treatment facilities on land and has excellent equipment efficiency. The third object is to provide a method and an apparatus for removing water from lakes, rivers, ports, etc. and removing only sand and mud to improve the efficiency of mud treatment later.

Means for Solving the Problem 1 The present invention involves draining water from sediment, mud, etc. at the bottom of the water, dredging it, and then dumping it on a dredging boat.Before crushing the mud, solids such as gravel are separated from the mud, and the mud is stirred. After that, it is mixed with a solidifying agent, and the mud mixed with this solidifying agent is pumped from the dredger to the destination through a pipe.

The present invention also provides a dredging means for dredging earth, sand, mud, etc. on the bottom of the water and dredging it on a dredger, and a dredging means installed on the dredger for separating the mud, etc. from solid matter such as gravel before crushing. a separating means, a mud processing means provided on the dredger for storing the separated mud and mixing it with a solidification agent, and a pump means for pumping the mud mixed with the solidification agent to a destination through a pipe. It is what it is.

[Function] The mud etc. dredged from the water bottom can be treated by mixing a solidifying agent in the dredger-L, and the mud with the solidifying agent mixed therein can be pumped through a pipe to a destination and reused.

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

Figures 1 to 4 show one embodiment of the present invention, in which a dredger 1 assembled with hollow blocks 2 made of steel is installed at the bottom of a dredging site A of mud 3 in lakes, rivers, ports, etc. A well-known self-propelled backfour 5 is mounted on the dredger 1, and a replaceable sealed hydraulic grab bucket 7 is attached to the tip of the arm 6 of the backfour 5. ing. These back four 5
, the arm 6 and the grab bucket 7 constitute a dredging means 8. Incidentally, the dredger 1 can be disassembled into blocks 2 and transported individually.

A bottomed separation tank 9 is installed at the upper part of the dredger 1 at approximately the center of the dredger 1. ) is installed obliquely, this secondary vibrating screen 10 has a vibrating mechanism (not shown), and on the side of this screen 10 there is a screen 10 that separates wood, vinyl, etc. from the mud 3 by the screen 10. A discharge path 11 for discharging the solid content is provided. A horizontal screw conveyor 12 and a plurality of vertical screw conveyors 13 that send the mud 3 to the opening 9A at the bottom of the separation unit 9 are provided.
is provided, and the opening 9A is provided with a discharge port 14 that communicates downward. This outlet 1
4 has a vibration mechanism (not shown) at the bottom of the 4 to separate solid matter (not shown) such as gravel before crushing.
A secondary vibrating screen 15 with variable I/I mesh ratio is provided, and a hopper 16 is provided below this screen. A discharge passage 17 is provided on the side of the hopper 16 for discharging the solid matter, such as gravel, which has not been separated by the secondary vibrating screen 15. Separation means 18 is constituted by the secondary vibrating screen 10, secondary vibrating screen 15, and the like.

A communication pipe 19 is provided at the lower opening of the hopper 16, the lower part of the communication pipe 19 communicates with the upper part of the stirring tank 2o, and a stirring rotor 21 having stirring blades 21A is provided in the stirring tank 2o, The stirring blades 21A are rotated by a rotation drive device (not shown) to stir the mud 3 in the stirring tank 20.

A connecting pipe 22 is provided on the other side of the manako stirring Wi 20, and this connecting pipe 22 is connected to a mud processing device 23, which is a mud processing means provided on the dredger 1. Further, a pump device (not shown in the figure) is installed in the middle of the connecting pipe 22 to pump the mud 3 from the agitator 920 to the mud treatment device 23. The mud treatment device 23
A solidifying agent 24 such as cement or quicklime is placed near I'1.
A screw conveyor 26 is installed on this elevator 1725, and the screw conveyor 26 sends the solidification agent 24 to a hopper 28 of a solidification agent supply device 27, which is a solidification agent supply means. , a control device (not shown) transfers the solidification agent 24 in the hopper 28 to the mud processing device 23 as powder according to the supply amount of the mud 3 transferred from the connecting pipe 22 to the mud processing device 23. A feeding device such as a core and a pump (not shown) is provided. The mud treatment device 23 is provided with a mixer 29 for mixing the mud 3 and the solidifying agent 24, and a discharge port 30 is provided at the bottom for discharging the mud 3 mixed with the solidifying agent 24 by the mixer 29. This discharge port 30 is provided with an opening/closing lid 31. Also,
A conveyor 32 is provided below the discharge port 30 to convey the belt 1 to the bell 1, and the belt conveyor 32 transports the mud 3 mixed with the assimilation agent 24 to a hopper 33. This hopper 33 is arranged in parallel with the mud treatment device 23, and a transfer pipe 34 is connected to its lower part, and this transfer pipe 34 is connected to a suction pipe 35A of a piston-type high-pressure pump 35 serving as pumping means.

The piston-type high-pressure pump 35 is provided with a pulley 36 to which the rotation of a prime mover (not shown) is transmitted, and has a transmission mechanism 39 that converts the rotation of the pulley 36 into reciprocating motion of a piston 38 in a cylinder 37. and the upper side of the pressure vessel 4o are connected by a transmission pipe 41, a communication pipe 42 is connected to the lower part of the pressure vessel 40, a one-way valve 43 is provided at the other end of this communication pipe 42, and this valve 4
3 is opened only in the discharge side 44 direction, and furthermore, the connecting pipe 42
The suction pipe 35A is connected to the suction pipe 35A by branching in the middle thereof, and a directional valve 45 that opens only in the direction in which the suction pipe 35A flows into the communication pipe 42 is installed at this branching point. The mud 3 flowing from the suction pipe 35A flows into the pressure vessel 40 up to a height position approximately at the center B, and flows from the upper part of the pressure vessel 40 into the transmission pipe 41 and into the cylinder 3.
7 is filled with oil C, and as the piston 38 retreats, the height of the mud 3 in the pressure vessel 40 rises, and the mud 3 in the hopper 33 flows into the communication pipe 42 from the suction pipe 35A, and the screw As the first hem 38 moves forward, the valve 43 on the discharge side 44 opens while the valve 45 is closed, and the mud 3 is pumped to the discharge side 44.

In addition, in the figure, E is the oil tank, E is the air vent valve, F is the refueling valve, G is the oil detection valve, )[ is the oil level detection valve, ■ is the mud 3 mentioned above.
J is an air chamber, K is a safety valve, and ■7 is a pressure gauge. Further, power is supplied to the prime mover of the piston-type high-pressure pump 35 from a generator (not shown) installed on the dredger 1.

As shown in FIGS. 5 and 6, the reclaimed land 46 is located in the same lake, marsh, river, port, or harbor as the dredging site A. Steel sheet piles 48 are driven along which bank 47, and the steel sheet piles are 48
A pressure feed pipe 49 made of a steel pipe or the like connected to the discharge side 44 of the piston-type high-pressure pump 35 extends to the landfill site 46 . still,
In the figure, 50 indicates the pressure feed pipe 49 at the dredging location A.
It is a floating body attached to.

Next, the operation of the above structure will be explained.

The mud 3 deposited on the bottom of the water at the dredging location A is collected by a sealed hydraulic grab bucket 7 attached to the arm 6 of the backfour 5, and mud 3 with a gold mud ratio of 90 to 95% is obtained. Then rotate the back four 5 and use the primary vibrating screen 10.
The packet 7 is opened at the top, and the mud 3 falling from inside the packet 7 is crushed by the vibrating primary vibrating screen 10 into trees,
Solids such as vinyl are separated and then passed through screen 10.
The mud 3 that has passed through is transferred to both driven screw conveyors 1
2.13, it is sent to the opening 9A and falls onto the vibrating secondary vibrating screen 15. This secondary vibrating screen 15 separates uncrushed solids such as gravel contained in the mud 3, and the mud 3 is stirred from the communication pipe 19 by the tfM20.
Water, sand, etc. in the mud 3 are uniformly sent to the mud treatment device 23 by the stirring rotor 21 which falls inward and rotates. The mud 3 is mixed with the solidification agent 24 sent from the solidification agent supply device 27 by the mixer 29, and then discharged to the hopper 33 by the belt conveyor 32. Then, the treated mud 3 mixed with the solidification agent 24 is pumped by a piston type high pressure pump 35 through the transfer pipe 34 to the pressure feed pipe 49)\ and sent to the landfill 461\.

In this way, in this embodiment, the water is drained from the earth, sand, mud 3, etc. on the bottom of the water, the dredging is carried out, and the dredging is carried out on the dredger 1.
Since the mud 3 etc. obtained after dredging contains less water, it is not necessary to remove the water when processing the mud afterwards, and the curing period of the mud 3 after the treatment is also shortened, thereby improving the processing efficiency. Also, before crushing, solids such as gravel are separated from the mud 3, etc., and after the mud 3 is stirred, it is mixed with a solidification agent 24, and the mud 3 mixed with this solidification agent 24 is pumped from the dredger 1 through a pipe to a destination. This means that the cost of transport can be reduced compared to the conventional method of reciprocating transport using soil transport vessels or the like.

Furthermore, the mud 3 that is not sent to the destination has already been mixed with a solidification agent 24, and after curing and solidification, the mud 3 is reused as soil for landfill or other purposes, or as civil engineering materials and construction materials such as foundation materials for paved roads. becomes possible.

Furthermore, in this embodiment, the mud treatment device 23 for mixing the solidification agent 24 into the mud 3 is installed on the dredger 1, so there is no need for a place to install the mud treatment device at a destination such as a landfill. be.

Therefore, if there is no space for this installation on land, the mud 3 mixed with the solidification agent 24 can be transported directly to the destination, which is an excellent effect, and furthermore, the cost of transporting the mud 3 can be reduced. Further, by providing the dredging means 8, the separation means 18, the mud treatment device 23, and the piston-type high-pressure pump 35 on the dredger 1 on the water, the equipment has excellent efficiency in terms of installation space on land.

In addition, in this embodiment, since the mud 3 at the bottom of the water is dredged using the sealed hydraulic grab bucket 7, the mud with a gold mud ratio of 90% is dredged compared to the mud with a gold mud ratio of 10 to 15% given by the conventional vacuum method. ~95% of the mud 3 can be obtained, and the water removal step before processing the mud 3 can be omitted, increasing processing efficiency. Also, by using the sealed hydraulic grab bucket 1 to 7, the mud 3 can be collected. At this time, the diffusion of mud 3 into the water is reduced, and water pollution can be kept to a minimum. Also, even when using a regular grab bucket, it is 70~. A mud with a gold content of 80% is obtained.

In addition, solids such as wood, vinyl, pebbles, etc. are separated from the mud 3 with a high gold mud ratio using the primary vibrating screen 10 and the secondary vibrating screen 15, and water is separated from the mud 3 by the stirring rotor 21 in the stirring tank 20. By stirring the mud 3 with a high gold mud ratio and sending it to the mud treatment device 23, the amount of solidifying agent 24 used can be reduced, and the mud 3 mixed with the assimilating agent 24 has a low moisture content, so it can be cured. The period is short,
It is possible to improve mud treatment efficiency and reduce waste by 1~1. Furthermore, the piston-type high-pressure pump 35 that pumps the mud 3 mixed with the solidification agent 24 separates the oil C and the mud 3 in the pressure vessel 40 into upper and lower parts due to the difference in specific gravity, and fills the cylinder 37 with the oil C and the mud 3. Since the reciprocating motion of the piston 38 applies hydraulic pressure to the mud 3 and pumps the mud 3 under high pressure, the mud 3 mixed with the solidification agent 24 is sent not only to the dredging site A but also to the land through the pressure feed pipe 49. Can be transported over long distances. Moreover, the mud 3 mixed with the solidifying agent 24 can be widely and effectively used for embankments, roadbeds, construction, backfilling, backfilling, etc. other than reclamation.

Note that the present invention is not limited to the above embodiments, and for example, a shovel may be used instead of the grab bucket.
Further, as a means for pumping the mud through a pipe, air pumping or the like may be used, and various types of pumps can be used. Alternatively, a silo or the like for storing the stirred mud 3 may be provided near the stirring tank 20, and the mud 3 may be supplied from the silo 1-7 to the mud processing device 23.

[Effect of the invention 1] The present invention is a dredger that removes water from soil, mud, etc. on the bottom of the water and then dredges it. After that, it is mixed with a solidification agent, and the mud mixed with this solidification agent is pumped from the dredger to the destination through a pipe. It can be treated so that it can be reused as other civil engineering materials and construction materials, and the cost of transporting dug up mud can be reduced, and the installation of treatment facilities on land is not required, improving equipment efficiency. Furthermore, it is possible to provide a method for treating mud, etc., which removes water from lakes, rivers, ports, etc. and scoops up only earth, sand, and mud, thereby increasing the efficiency of subsequent mud treatment.

The present invention also provides a dredging means for dredging earth, sand, mud, etc. on the bottom of the water and drilling it on a dredger, and a separating means provided on the dredger for separating the mud, etc. from solid matter such as gravel before crushing;
A mud processing means is installed on the dredger to store the separated mud and mix it with a solidification agent, and the mud mixed with the solidification agent is pumped to the destination through a pipe, and the mud is excavated and sent to the site. It is possible to process the muddy soil so that it can be reused as a material for landfill or other purposes, or as other civil engineering materials or construction materials.It also reduces the cost of transporting the muddy soil that has been dug up, and makes it possible to install treatment facilities on land. It is possible to provide a mud treatment device that does not require space, has excellent equipment efficiency, and further improves the efficiency of subsequent mud treatment by removing water from lakes, rivers, ports, etc. and scooping up only earth, sand, and mud.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an explanatory view showing the surroundings of the mud treatment device, Fig. 4 is an explanatory view showing the same pump, Fig. 5 is a schematic explanatory diagram showing an example of a landfill, and FIG. 6 is a schematic explanatory diagram of the same. 1... Dredger 3... Mud 8... Dredging means 18... Separation means 23... Mud processing device (mud processing means) 24... Solidifying agent 27... Solidifying agent supply device 35... Piston type high pressure pump (pump means) 49.
...Pipe Patent Applicant Honma Gumi Co., Ltd.

Claims (2)

[Claims] (1) Dredge and dredge soil and mud from the bottom of the water and dump it on a dredger, separate solids such as crushed rock and gravel from the mud, stir the mud, mix it with a solidifying agent, and solidify it. A method for treating mud, etc., characterized in that the mud mixed with the agent is pumped from the dredger to a destination through a pipe. (2) a dredging means for dredging earth, sand, mud, etc. on the water bottom and dredging it on a dredger; a separating means installed on the dredger to separate the mud from solids such as crushed rock and gravel; and a separating means installed on the dredger. A mud treatment device comprising a mud treatment means for storing the separated mud and mixing it with a solidification agent, and a pump means for pumping the mud mixed with the solidification agent to a destination through a pipe.