JPS6073920A - Settled-mud dredger - Google Patents

Abstract

PURPOSE:To dredge sludge settled on the shallow bottom without diffusion of an offensive smell and turbidity of water, by a method wherein an elevatable caisson and dredger crane are located to the front of a dredger, a storage tank and a classifier to the central part, and a suction device and a belt conveyor to the rear thereof. CONSTITUTION:A crane 5 is located to the forward end of a ship 1, a dredged matter storage tank 204, a rotary sieve 9, a spiral classifier 10, and a wet type dust collecting vessel 202 to the central part thereof, and a suction device 20 with a silencer, and a plurality of belt conveyors 11 and 12 to the rear part thereof. A pair of outriggers 8 are mounted to the central parts on both sides of the bull 1. A bucket 503 and a suction pipe 205, through which dredged matter in the bucket 503 is sucked, and attached to the forward end of the crane 5, and the suction pipe 205 is communicated with the tank 204. A caisson 6, which can be freely elevated in water, is located to the front of the ship 1. This permits dredging of sludge on the shallow river or sea bottom in a condition while preventing diffusion of an offensive smell and the sludge.

Description

[Detailed Description of the Invention] This invention relates to a dredger for sludge and mud, and its purpose is to disturb sludge and transport anaerobic gases such as methane gas in the mud to work sites in small rivers in cities where the river width is narrow and the water depth is shallow. If it spreads to surrounding residential areas, it will become a source of pollution and work noise will become a problem.Furthermore, rivers where houses are densely packed right up to the river quays and large excavators such as cranes cannot be introduced into the river. We provide a silt dredger that can be used effectively to dredge silt at the bottom of lakes, dams, agricultural ponds, etc.In general, large rivers, ports, etc. have silt at the bottom. If they accumulate, they can cause river flooding and ship stranding, so they are often dredged.

For these dredging methods, if it is a river, sheet piles etc. are driven into the area to be dredged, earth is secured, scaffolding is secured to allow the introduction of a large crane with a packet, the bottom soil is dredged with the packet, and other materials such as a dump truck are used to remove the soil. The method used was to transport the subsoil to the location.

With this method, it is true that the problem of noise in the vicinity is unlikely to occur because the river is large, but there is the problem that it takes a lot of work hours and man-hours, and the problem of river water pollution is unavoidable. there were.

On the other hand, in ports and harbors, work was carried out using large dredgers equipped with large cranes, and the bottom soil excavated by the crane's packets was dumped onto other transport vessels.

However, all of these methods were only possible at sites where there were no noise pollution problems or difficulties in transporting the equipment used in the dredging method to the vicinity of the work site.

In small and medium-sized rivers, lakes, agricultural canals, etc. within cities, houses are densely packed right up to the quays, making it often impossible to bring in large equipment, and also causing pollution problems due to the diffusion of anaerobic gas into surrounding houses due to dredging of mud. Due to problems such as pollution caused by digging up muddy soil in rivers and difficulties in transporting the dredged soil, the current situation is that sedimentary muddy soil is allowed to accumulate and is left unattended.

Moreover, these small and medium-sized rivers are usually narrow, about 5 to 10 meters wide, and extremely shallow, about 70 to 130 centimeters deep.

This invention was made to overcome these conventional drawbacks. Specifically, this invention is suitable for use in sites where the water depth is shallow, where anaerobic gas diffusion due to disturbance of settled mud, water turbidity, or work noise is aversive. A sludge dredger used for dredging sludge from rivers, lakes, etc., including a crane device capable of extending at least a caisson, its supporting device, a bucket, and a hose onto the hull, and a length of up to 1
A suction device consisting of a single suction pipe, a tank that intermittently discharges a fixed amount of accumulated material, a wet dust collection tank, a suction pump, and a silencer, a two-rotation sieve device, and a spiral classifier,
At least three transport devices.

This relates to a sludge dredger that is equipped with a dewatering device.

An embodiment of the present invention will be described below based on the drawings.

What is illustrated in FIGS. 1 to 11 is a silt dredger according to an embodiment of the present invention.

In this example, this hull is the first
8) and a secondary assembly plate (FIGS. 9 to 11), which can be freely connected to each other, this embodiment does not necessarily apply to the present invention. The present invention is not limited to this, and a hull in which the first assembly plate and the second assembly plate are integrated may be used.

In FIGS. 1 to 8, (2) is a primary ship constituting the hull, and (20) is a suction device mounted on the deck (30) inside this hull.

This suction device (20) is connected to the deck (30) as shown in Figure 5.
) and the suction mechanism (201) such as a roots blower are rotatably connected to the drive source (4) loaded under the suction mechanism (201).
201), at least two tanks, a wet dust collection tank (202) and a mist catcher and muffler tank (203), are either integrally combined or separately arranged close to each other;
The discharge port (204k) of the intermittent discharge tank (204) described later is communicated with the suction port (202a) of the wet dust collection tank (202) to communicate with the suction port of the suction mechanism (201), and the discharge port of the suction mechanism (201) The outlet is a mist catcher and a silencer tank (
A suction vibrator (205) is connected to the suction port of the discharge tank (204), which is connected to the suction port of the discharge tank (204), and the discharge port is opened to the atmosphere through the outlet of the mist catcher/silence tank (203). It will be installed.

The wet dust collection tank (202') and the mist catcher/silence tank (203) are used to cool the suction mechanism (201) and to prevent foreign objects such as vinyl from being fed into the suction mechanism (201'). make money.

FIG. 6 shows an enlarged view of the intermittent discharge tank (204),
In the drawing, (204a) is a detection device that detects the volume of distillate in this tank at a preset required amount, and a vacuum release device (204b) that releases the vacuum state in the tank in conjunction with this detection device (204a). And this vacuum release device (
A discharge device (204c) that discharges distillate from the tank to the outside of the tank simultaneously with or in conjunction with 204b) with a slight time delay.
It consists of

In the embodiment shown in FIG. 6, this detection device (204a) has its base end pivoted at the center of the umbrella-shaped saucer (204a) and the umbrella-shaped saucer (204d), and its upper end is attached to the vacuum release device (204d).
4b) and a support rod (204f) fixed to the lower end of the casing (204e).

Moreover, this vacuum release device (204b) is connected to the casing (
204e) and a spring mechanism (204g), and this spring mechanism (204g) penetrates through the upper part of the tank (204) and is attached to a sheathing (204h) and a sheathing (204g).
h) The spring (204
An example consisting of i) is illustrated. Further, the vacuum release device (204b) is connected to the casing (204h) and the lower end of the casing (204h) of the spring mechanism (204g) protruding from the through hole formed in the upper part of the casing (204e). 204e) and a blockage valve (204j) which is attached to the inside of the valve 204e so as to be openable and closable.

This tank (204) discharges the internal matter even when the suction device (2) is in continuous operation, and after this discharge, each of the above-mentioned machines immediately returns to its current state and continuously operates the suction mechanism (201). It is capable of continuous discharge and suction.

The discharge port (204k) of this tank (204) is connected to the suction port (202a) of the wet dust collection tank (202), and the suction port (2021) of this tank (204) is connected to the suction pipe (205). are connected in series.

The tip of the suction pipe (205) is connected to one arm (501) of the crane device (50), as shown in FIGS. 3 and 4.
It is fixed to the caisson (60) and can freely extend to the inner bottom of the caisson (60). The other arm (50) of the crane device (50)
2) is provided with a packet (503) at its tip.

In addition, FIGS. 3 and 4 are enlarged explanatory views of a modified example of the ship's head for the first fattening shown in FIGS. 1 and 2, and this modified example includes a caisson (60) and a crane device ( 50) is shown below.

That is, the embodiments shown in FIGS. 1 and 2 show an embodiment in which the crane device (50) is equipped with one arm (504) and the caisson (60) is supported on the ship's head in a cantilevered manner. In the modified example, the crane device (50) has two arms (501) and (502), and a caisson (60).
is held in the head of the ship, and is a hydraulic cylinder (7) (
Four supporting devices are provided to ensure uniform sinking (driving performance) of the caisson (6).

Incidentally, the crane device (5) may be a stationary type or a movable type.

(8) is an outrigger that ensures stability during work on the primary ship.

(9) is a rotating sieve device such as a trommel, and the dredged soil discharged from the intermittent discharge tank (204) of the suction device (20) is supplied to this rotating sieve device (9). (plastic powder), etc. are separated (see Figures 1, 2, and 7).

The dredged soil that is not separated by this rotary sieve device (9) is sent to a spiral classifier 00) and is separated into sand and dredged soil finer than sand (containing moisture).

(11) and (12) are conveyor belt conveyors and other conveyors installed at the stern of the ship, and the conveyor (11) in - is used to carry coarse bones separated by trommel, refrigerators and bicycles pulled up by packets (503). Non-inhalable precipitates such as

The other conveyance device (12) is a spiral classifier α0)
Relatively fine dredged soil, such as sand, is separated and transported.

In addition, (13) is an operation and control room.

This first ship 4 may or may not be equipped with a loading dock W (not shown).

The transport devices (11), (12) extend through the secondary ship layer to the transportable device.

9 to 11 show the second accession, and this second layer is equipped with at least a dewatering device (14). This second fleet may or may not be equipped with a loading dock W (not shown).

As this dewatering device (14), for example, a vertical centrifugal sedimentation machine as shown in FIG. 11 can be suitably used.

This dehydrator (14) has a cylindrical main body (141), a rotating shaft (142) is inserted into the main body (141) from the center of the top surface, and a solution outlet (143) is provided at the bottom.
A rotating drum (144) having a cylindrical shape and having a bottom plate bent inward at the upper part is connected to the rotating shaft (142), and is connected to the rotating drum (144) through a required gap from the inner wall of the main body (141). ) is installed inside.

(145) is the pipe for supplying dredged material that requires dewatering, and this pipe (145) is the spiral classifier 0 of the first generation.
0) is connected to a pump (not shown) and a pipe (not shown), and is sent through this pipe (145), and this primary navigation vibe (not shown) and pipe (145) It is connected in communication. (146) is a scraping device that scrapes off solid matter trapped within the rotating drum (144).

The clean water discharged from this discharge port (143) is returned to a river, lake, pond, etc., with or without a secondary affiliated drainage tank.

(15) is a third conveyance device such as a belt conveyor that sends the solid matter separated by the dehydrator (14) to a place where it can be transferred.

Note that (16) is the engine room.

Below the deck (17) of the second assembly plate, there are several tanks (for example, a flocculant tank for supplying the dehydrator (14), a tank for diluting the flocculant and cleaning the dehydrator (14)). The tank is divided into a fresh water tank for storing water, a tank for storing waste water from the dehydrator (14), etc.

(Refer to Figures 9 to 11) It is desirable that the depth to the waterline of the first ship, the ship, and the second ship are approximately 50 cm, and the hull width is approximately 5 m.

In order to implement this membrane compliance using such a vessel, the above-mentioned vessel must be transported from the river mouth or by other means such as a truck to a location where the water is shallow and the silted mud is disturbed. It is floated in rivers, lakes, ponds, where diffusion of anaerobic gases, water turbidity, and work noise are objectionable, and then moved to areas that require dredging.
Extend the gar (8) and drive the sarson (6) from above the water to the bottom of the settled mud to secure a working space.

In this state, the engines for the first and second ship rotations are operated, and the surface water in the caisson (6) is first drawn out by extending the - arm (501) of the crane device (5) and suction pipe. (205) is inserted into the caisson (6), and the suction device (Ki) is activated to suck it into the intermittent discharge tank (204).

This surface water and surface water are supplied from the intermittent discharge tank (204) to the rotating sieve (9).
The coarse materials separated are transferred to the tertiary lead container by a belt conveyor (11).

In this process, the amount of dredged material supplied to the intermittent discharge tank (204) and the rotating sieve (9) such as a trommel should be as quantitative and continuous as possible to reduce the load on the rotating sieve (9). Therefore, it is preferable to make the intermittent discharge amount small and shorten the discharge cycle, or to provide a regulator between the intermittent discharge tank (204) and the trommel (9) for quantification.

The unsorted material in the rotary sieve (9) is separated into sand and further unsorted material (including water) by the spiral classifier, and the sand is transferred to a transportable device by a belt conveyor (12).

The unsorted material (including water) of this spiral classifier (QO) is sent by a pump through a pipe to a dehydrator (14) of the second stage.

The water drained from the dehydrator (14) is returned to the outside of the ship from the drain port (143) via the drain tank, and the solids in the rotating drum (144) are removed by activating the scraping device (16). Then, it is scraped and taken out of the dehydrator (14), and sent to a transportable device by a belt conveyor (15).

In this suction removal process, if there is bulky garbage such as a bicycle or refrigerator that cannot be sucked in by the suction pipe (205), the suction operation is stopped to remove this bulky garbage and the other arm (502) of the crane device (5) The packet (503) is driven and removed.

Next, the suction hose (205) of the suction device (20) is extended again to remove the settled mud up to the bottom of the caisson (6) to continue the suction dredging process.

Finally, the dredged solids are delivered by a transportable device, such as a truck, another vessel, or a conveyor belt connected to land.

In this case, it is convenient if the transportable device is divided into slags that have been separated and classified, since a disposal means suitable for the purpose can be adopted.

By repeating this process, dredging of rivers, lakes, ponds, etc. that require narrow and shallow dredging can be completed without any pollution.

As detailed above, the silt dredger according to the present invention has the following features:
Usually the river width is narrow, around 5-10m, and the water depth is 70cm.
Even in sites where houses are close to the quay and equipment cannot be brought in, such as small and medium-sized rivers in cities, lakes, agricultural canals, etc., which are extremely shallow (approximately 130 cm + n), it is possible to remove anaerobic gas from surrounding houses by dredging mud. Pollution problems caused by proliferation,
It has the effect of dredging small and medium-sized rivers that have been left unattended and left to accumulate sediment by solving problems such as water pollution caused by digging up rivers with mud or the difficulty of transporting dredged soil. It's a ship.

[Brief explanation of drawings]

Figure 1 is a side view of the first set, Figure 2 is a plan view of the first set, Figure 3 is a plan view of a modified example of the head of the first set, and Figure 4 is a side view of the first set. Figure 3 is a side explanatory view, Figure 5 is a flow explanatory diagram of the suction device installed in the primary group, Figure 6 is a front sectional view of the intermittent discharge tank of this suction device, and Figure 7 is the flow diagram of the suction device installed in the primary group. An explanatory diagram of the rotating sieve to be installed, Fig. 8 is an explanatory diagram of the spiral classifier installed in the first set, Fig. 9 is a side view of the second set, and Fig. 10 is a plan view of Fig. 9. , FIG. 11 is a front sectional explanatory view of the dehydrator installed in the second set. World - 1st group Sato - 2nd group (51 - Crane device (6) - Caisson (9) Single rotation sieve device α0) - Spiral classifier (11), (12) - Belt conveyor (14) -
Dehydrator (20) - Suction device (201) - Suction mechanism (20
2)... - Wet dust collection tank (203) - Mist catcher/silence tank (204) - Intermittent discharge tank (205) - Suction pipe

Claims (1)

[Claims] (1) A silt dredger used to dredge silt mud in rivers, lakes, etc. at sites where the water depth is shallow and disturbance of the silt mud causes dispersion of anaerobic gases, turbidity of water, or work noise. A crane device capable of extending both the caisson and its support device, the packet and the hose over at least the hull. A suction device consisting of a continuous suction pipe of the required length, a tank that intermittently discharges accumulated material in a fixed amount, a wet dust collection tank, a suction pump, and a silencer, a one-rotation sieve device, and a spiral classifier, at least three units. A sludge dredger comprising a transport device and a dewatering device.