JPH0447036A - Water bottom sludge collecting method and device therefor - Google Patents

Abstract

PURPOSE:To make the sludge collecting work easier by providing a suction hose from a flat boat to the bottom of the water where the sludge is accumulated, connecting the suction hose to the side of two suction/exhaust tanks set on the flat boat, and sucking and draining the sludge on the bottom of the water continuously. CONSTITUTION:A flat boat 1 is floated on the water surface, its position on the water surface is regulated by wires 11 and spuds 12, and an operation means 2 is operated to dig the sludge on the bottom of the water. Then a compressed air is fed to a feeding pipe 16 by operating a compressor 7 and a vacuum generating device 8, and a vacuum pressure and a compressed air are fed into suction/exhaust tanks 6. Then, the dug sludge is churned by an attachment 3, and sucked into the suction/exhaust tanks 6 through a sludge suction hole 3a and a suction hose 4. And suction check valves in the suction/exhaust tanks 6 are closed, while exhaust check valves are opened, and the sludge is pushed through exhaust pipes 5 by the compressed air. As a result, the sludge can be pushed out through a long distance easily.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an underwater sludge recovery method and an underwater sludge recovery device, and its purpose is to suck up sludge deposited on the bottom of the water without muddying the surrounding waters, and to remove sludge from land. An object of the present invention is to provide an underwater sludge recovery method and an underwater sludge recovery device that can discharge and recover the sludge at a recovery site.

(Prior Art) In recent years, the deposition of sludge on the bottom of water such as riverbeds, harbor beds, lakebeds, and underground water sources has not only caused the problem of the water becoming deeper or shallower, but also caused problems such as causing pollution. These sludges are being dredged and cleaned.

Conventionally, as shown in Fig. 5, a packet (d) is provided at the tip of the operating arm (a) of a hoist (c) that has an excavation operating arm (a) and is installed on a barge (b). A method of excavating and dredging sludge at the bottom of the water, with packets (
The sludge at the bottom of the water is lifted from the water to the surface using methods such as grabbing the sludge at the bottom of the water in step d), and the sludge is collected onto the barge (b) or on land while draining water by dripping water from the periphery of the packet (d). Ta.

(Problem to be Solved by the Invention) However, in the conventional water bottom sludge recovery method as described above, when the packet (d) is used to excavate the water bottom, sludge is spread around it, and the packet is transferred from the water to the surface of the water. When the packet (d) is lifted, the sludge inside the packet (d) contaminates the surrounding water area, and the sludge that is spread also creates a bad odor.

In addition, water dripping from the periphery of packet (d) when lifted above the water pollutes the water surface.
In lakes and the like in tourist areas, the aesthetic appearance is spoiled, and furthermore, in water source areas, if this water is used for drinking water, there is a problem in that it gives an unsanitary appearance.

On the other hand, when using packets to grab sludge from the bottom of the water, a large amount of water was also scooped up along with the sludge, so it was necessary to treat this surplus water.

(Means for Solving the Problems) In this invention, a suction hose is arranged from a barge floating on the water surface to the bottom of the water where sludge is deposited, and a discharge pipe is arranged from the barge to a sludge collection site on land. , the ends of the suction hoses are connected to the respective sides of the two suction and exhaust tanks installed on the barge through check valves, and the base ends of the discharge pipes are connected from the tops of the respective suction and exhaust tanks to the vicinity of the inner bottom surfaces. are connected to each other through a check valve, and when one of the suction and exhaust tanks is brought into a reduced pressure state by the operation of a compressor and a vacuum generator, which are connected to these suction and exhaust tanks through a supply pipe and a suction and exhaust switching valve. The inside of the other suction/discharge tank is pressurized, and in this state, the sludge from the suction hose is sucked into the negative suction/discharge tank, and the sludge in the other suction/discharge tank is forced into the discharge pipe; When one of the suction/discharge tanks becomes full, the suction/discharge switching valve senses a signal from a level meter provided in the suction/discharge tank and reverses the supply of pressurization or depressurization to each suction/discharge tank, thereby removing the sludge from the bottom of the water. A method for recovering underwater sludge characterized by continuously suctioning and discharging sludge, and (function) First, a compressor and a vacuum generator on a barge are operated.

The compressed air and vacuum pressure generated by this operation are supplied to the suction and exhaust tanks on the barge through the supply pipe.

In one suction and exhaust tank, the check valve on the suction hose side opens and the check valve on the discharge pipe side closes, and in the other suction and exhaust tank, the check valve on the discharge pipe side opens and the check valve on the suction hose side closes.

As a result, the bottom sludge sucked in by the suction hose is sucked into one suction/discharge tank, and the sludge already sucked in the other suction/discharge tank is pressurized and forced into the discharge pipe.

When one of the suction and exhaust tanks becomes full of sludge, a signal is transmitted from the level meter attached to the suction and exhaust tank to the suction and exhaust switching valve installed in the middle of the supply pipe, and this supply pipe increases or decreases the pressure in the suction and exhaust tank. The supply of sludge is switched, the sludge in the one suction/discharge tank is forced into the discharge pipe, and the sludge from the suction hose is sucked into the other suction/discharge tank.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1(A) to 4.

First, FIGS. 1(A) and 1(CB) show the entirety of a first embodiment of an underwater sludge recovery apparatus according to the present invention.

This underwater sludge recovery device consists of a barge (1) and an operating means (2).
, attachment (3), suction hose (4), discharge pipe (5), suction and exhaust tank (6), and compressor (
7), a vacuum generator (8), and a control means (9).

A winch α0) is installed on the barge (1), and a wire material αD such as a rope or wire is wound around this winch α0.
Also, a spud (■) is provided on the side of the barge (1).

During work, place the wire αD at a suitable location (or anchor) on land.
By adjusting the tension of the wire αD, the barge (1) can be fixed on the water surface, or the barge (1) can be moved by operating the wire αD.

Further, dredging work can be carried out by driving the spud @ into the water bottom using a hydraulically driven rack-pinion mechanism and turning the barge (1) using the spud driving position as a fulcrum.

The operating means (2) is an arm-shaped member installed at the tip of the barge (1), and can be moved up and down and turned left and right by operation within the operation room ae.

The attachment (3) is a substantially cylindrical member that is attached to the tip of the operating means (2) and has a sludge suction port (3a).

In this example, the attachments shown in Fig. 4 (A) and (B) are shown.
The one shown below is used.

This attachment (3) is a cylindrical drum (3c) attached to a casing (3b) that connects to a hydraulic motor (3d).
This drum (3C) is rotated by a scraping blade (
(not shown) is attached.

(3e) is a mounting portion for the operating means (2).

During sludge collection work, use the drum (3) of the attachment (3).
c) Drum (3) is buried halfway in the sludge.
c) is rotated to agitate the sludge with the scraping blade attached to this drum (3c) to make it easier to suction.

The stirred sludge is sucked through a sludge suction port (3a) opened at the bottom of the attachment (3).

According to this attachment (3), the sludge suction port (3a
) is open at the bottom, which prevents water from entering, and since the sludge suction port (3a) itself does not rotate, the suction efficiency does not decrease.

In addition, it is preferable to use the above-mentioned structure as the attachment (3).
A structure having an opening on the side (not shown) may also be used.

The suction hose (4) is a hose for sucking in water bottom sludge, and its tip is connected to the sludge suction port (3a), and its end is connected to the suction/discharge tank (6a) (described later) on the barge (1) (8b).
) is connected to the side of the

The discharge pipe (5) is a pipe that pumps the sucked sludge to the sludge recovery site, and although a hose is used in this embodiment, it may be a steel pipe.

The base end of this discharge pipe (5) is the suction/discharge tank (6a) (6b
) is connected in communication from the top to the vicinity of the inner bottom surface, and the end is opened to the sludge collection site.

The suction/exhaust tanks (6a) (6b) are two approximately hollow cylindrical tanks arranged side by side on the barge (1), and as mentioned above, the suction hose (4) is connected to each tank (6a) (6b).
) and the base end of the discharge pipe (5) are connected to each other, and a suction and discharge check valve (141a) is connected to the connected portion.
s or mediated.

The suction check valve (14) 04) between the suction hose (4) and the suction/discharge tank (6) is connected to the suction hose (
4), and the discharge check valve αSa9 between the discharge pipe (5) and the suction/discharge tank (6) is a valve that prevents backflow from the inside of the discharge pipe (5) to the suction/discharge tank (6). It is.

A level meter αg for detecting the liquid level in the tank is attached to the upper side of the interior of the suction/discharge tank (6).

The compressor (7) and vacuum generator (8) are connected to a barge (
1) The supply pipes 000e are arranged in parallel at the upper rear part, and one end of the supply pipe 000e is connected to the compressor (7) and the vacuum generator (8) as shown in FIG.
The other ends of the 9 Ge are connected to the sides of the suction/discharge tank (6) one by one.

The suction/discharge tank (6a) is connected to the supply pipe αe0G by the operation of the compressor (7) and vacuum generator (8).
Compressed air or vacuum pressure is supplied in (6b).

In this embodiment, the vacuum generator (8) includes a roots blower (8a) as a suction source, a cyclone dust collector (8b), a wet dust collection tank (8c), and a mist catcher/silencer (8d) as shown in the second figure. It is set up in series.

To explain its action, first, the Roots blower (8a) is activated and a suction action is generated within the supply pipe αe. At this time, the dust that has been sucked into the vacuum generator (8) together with the air is collected by the cyclone dust collector (8b) and the wet dust collection tank (
8c) and the mist is removed by a mist catcher (8d).

In the illustrated example, the control means (9) is provided in a control room α installed between the suction and exhaust tank (6), the compressor (7), and the vacuum generator (8).

This control means (9) is a means for controlling the supply of compressed air and vacuum pressure within the supply pipe Ge by sensing the signal from the level meter α'&, and includes an air control valve G1 and a suction/exhaust switching valve ■. It has.

The air control valve α9 senses the signal and operates the intake/exhaust switching valve (■).

Each of the above supply pipes 000■ is activated by the suction and discharge switching valve■.
Switch the compressed air and vacuum pressure supplied to each.

In addition, the control room G'71 is equipped with an earth volume recording device that records the amount of dredged earth per hour and per day.

Note that (21) is a generator.

Next, a method for collecting bottom sludge using the bottom sludge recovery device as described above will be explained.

First, the barge (1) is floated on the water surface, and its position on the water surface is controlled by the wire αD and the spud 0z.

Next, the operation means (2) is operated to excavate the water bottom sludge.

On the other hand, the compressor (7) and the vacuum generator (8) are operated to supply compressed air or vacuum pressure to each of the supply pipes αe0e.

First, when vacuum pressure is supplied into the suction/exhaust tank (6a) by the vacuum generator (8), compressed air is simultaneously supplied into the suction/exhaust tank (6b) by the compressor.

At this time, the suction check valve Q41 on the suction/discharge tank (6a) side opens and the discharge check valve α9 closes. The suction check valve a on the suction/discharge tank (6b) side is closed, and the discharge check valve α9 is opened.

The excavated sludge is stirred by the attachment (3) and sucked into the suction/discharge tank (6a) through the sludge suction port (3a) and the suction hose (4).

When the inside of this suction/discharge tank (6a) is full, the level meter becomes 0.
9 senses it and transmits the signal to the air control valve a9 of the control means.

The air control valve q9 senses this signal and operates the intake/exhaust switching valve (■).

Vacuum pressure is supplied to the supply pipe oe to which the compressed air was being supplied by the operation of the suction/exhaust switching valve (2), and compressed air is supplied to the supply pipe oe to which the vacuum pressure had been supplied.

As a result, the suction check valve 041 on the suction/discharge tank (6a) side
is closed and discharge check valve α9 is opened, so this suction/discharge tank (6
The sludge in a) is pumped through the discharge pipe (5) by compressed air and sent to the sludge collection site.

At the same time, the suction check valve αΦ on the suction/discharge tank (6b) side opens due to the vacuum pressure, and the discharge check valve α9 closes, so that the sludge in the suction hose (4) flows into the suction/discharge tank (6b). It gets sucked in.

When the suction/discharge tank (6b) is full, this suction/discharge tank (6b)
6b) is sensed by the level meter, and the suction/exhaust switching valve (2) is operated in the same way as described above to switch between pressurization and depressurization in the suction/exhaust tanks (6a) and (6b).

The above suction and discharge operations are performed continuously.

3(A) and 3(B) show a second embodiment of the underwater sludge recovery apparatus according to the present invention.

In this example, the underwater sludge recovery equipment consists of two barges (22) (2
3), the first barge (22) is a crawler (24)
The operation means (2) for guiding the suction hose (4) and the suction/exhaust tank +6) (6) are installed on this first barge (22), and the suction/exhaust tank (6) (
The discharge pipe (5) from 61 runs to the sludge collection site on land.

Additionally, a spud α2 is attached to the side.

A control means (9), a compressor (7), and a vacuum generator (8) are installed on the second barge (23), and a spud device is installed on the side and a wire rod fastened to the shore at the corner. (25
) is installed.

The first and second barges (22) (23) are equipped with suction and exhaust tanks (6) (6), a compressor (7), and a vacuum generator (
8) are connected by a supply pipe connecting them.

According to this second embodiment, for example, the first barge (22) is self-propelled and intrudes into a shallow water place, and the second barge (23) is installed on land or floated on the water surface. work.

The method of suctioning and pumping the sludge is the same as in the first embodiment.

(Effect of the invention) This invention provides a suction hose from a barge floating on the water surface to the bottom of the water where sludge is deposited, and a discharge pipe from the barge to the sludge collection site on land. The ends of the suction hoses are connected to the respective sides of the two installed suction and exhaust tanks via check valves, and the base ends of the discharge pipes are connected from the tops of the respective suction and exhaust tanks to the vicinity of the inner bottom surfaces with check valves. When one suction/exhaust tank is brought into a depressurized state by the operation of the compressor and vacuum generator, which are connected to these suction/exhaust tanks via the supply pipe and the suction/exhaust switching valve, the other suction/exhaust tank is In this state, the sludge from the suction hose is sucked into the negative suction and exhaust tank, and the sludge in the other suction and exhaust tank is forced into the discharge pipe, and When the tank is full, the water bottom sludge is continuously removed by sensing the signal from the suction/discharge switching valve or the level meter installed in the suction/discharge tank and switching between supplying pressurization and depressurization to each suction/discharge tank. A method for recovering sludge from the bottom of the water, characterized by suction and discharge, and a barge, an arm-shaped operating means attached to the tip of the barge, and a substantially cylindrical sludge attached to the tip of the operating means. an attachment having a suction port, a suction hose connected to the sludge suction port from the barge, a discharge pipe continuous from the barge to the sludge collection site, and a suction hose and the discharge pipe installed on the barge. It has a suction/exhaust tank that is connected in communication, a compressor that sends compressed air to the suction/exhaust tank, and a vacuum generator that generates a vacuum. The ends of the suction hoses are connected through a check valve, and the upper ends of both suction and exhaust tanks are connected through the base ends of the discharge pipes or the check valves, and the compressor and the vacuum generator are connected to each other through a check valve. is connected to the side of each suction/exhaust tank via a supply pipe, and a suction/exhaust switching valve that operates by sensing a signal from a level meter provided in the suction/exhaust tank is connected in the middle of this supply pipe. This underwater sludge recovery device is characterized by the following effects.

In other words, the water bottom sludge is directly sucked through the suction hose,
This suction hose sucks the sludge into the suction and discharge tank on the barge, and from this suction and discharge tank, the sludge is pumped through the discharge pipe to the sludge collection site on land, which causes the sludge to spread at the bottom of the water, making the surrounding water area muddy and producing bad odors. I have nothing to do.

Moreover, since the sludge stirred by the attachment is sucked in, the sludge becomes fluidized and can be easily pumped over long distances from the suction/discharge tank compared to stable sludge.

Since the sludge is sucked and discharged by the above-mentioned alternate suction and pressure feeding using the two suction and discharge tanks, the sludge can be sucked and pumped continuously rather than intermittently, which is efficient.

In addition, the bottom sludge recovery device is installed above the water surface on a first barge that is self-propelled by a crawler, and the operating means, suction pipe, discharge pipe, and suction and discharge tank are installed on the first barge, and the compressor, the vacuum generator, and the suction and discharge switching valve are installed on the platform. If the structure is installed on a second barge that is connected to the ship and can float on the water surface, and a supply pipe is arranged between the first and second barges, there will be problems such as shallow water depth or narrow water area. For this reason, sludge collection work can be easily carried out even in places where it is difficult to float a normal barge.

Furthermore, the attachment has a substantially cylindrical casing and a substantially cylindrical drum that is rotatable along the side surface of the casing and has an open bottom, and a sludge suction port of the attachment is opened at the bottom of the casing. If the sludge is formed by the attachment, the sludge will be sucked in from the bottom of the attachment, so the water near the bottom will not be sucked in, and the sludge suction port itself will not rotate, so the suction efficiency will decrease. do not have.

[Brief explanation of the drawing]

FIG. 1(A) shows the first part of the underwater sludge recovery device according to the present invention.
FIG. 1(B) is a plan view of the embodiment, FIG. 2 is a schematic flowchart of the underwater sludge recovery method according to the present invention, and FIG. 3(A) is a diagram of the second embodiment of the underwater sludge recovery device. Floor plan, 3rd
FIG. 4(B) is a side view of the same as above, FIG. 4(A) and FIG. 4(B) are a plan view and a vertical sectional view of the attachment, and FIG. 5 is an explanatory diagram of a conventional example. +11 (22) (23)...Barge (2)...
・Operation means (3)... Attachment (3a)...
・Sludge suction port (4)...Suction hose (5)...
・Discharge pipe (6) ((6a) (6b))... Suction and exhaust tank (7)... Compressor (8)... Vacuum generator (9)... Control means 04... Suction check Valve α9...Discharge check valve α■qe...Supply pipe αt...Level meter ■...Suction/exhaust switching valve (2
4)...Crawler

Claims (4)

[Claims] (1) A suction hose is arranged from the barge floating on the water surface to the bottom of the water where sludge is deposited, while a discharge pipe is arranged from the barge to the sludge collection site on land. The ends of the suction hoses are connected to each side of the tank through check valves, and the proximal ends of the discharge pipes are connected through check valves from the top of each of the suction and exhaust tanks to the vicinity of the inner bottom surface. However, when one of the suction and exhaust tanks is brought into a depressurized state by the operation of a compressor and a vacuum generator that are connected to these suction and exhaust tanks via a supply pipe and a suction and exhaust switching valve, the other suction and exhaust tank is put into a pressurized state. In this state, the sludge from the suction hose is sucked into the one suction/discharge tank, and the sludge in the other suction/discharge tank is forced into the discharge pipe, so that the one suction/discharge tank becomes full. Then, the suction/discharge switching valve senses the signal from the level meter installed in the suction/discharge tank and switches between supplying pressurization and depressurization to each suction/discharge tank, thereby continuously suctioning and discharging the bottom sludge. Characteristic underwater sludge recovery method. (2) A barge, an arm-shaped operating means attached to the tip of the barge, an attachment that is approximately cylindrical and has a sludge suction port attached to the tip of the operating means, and the sludge is removed from the barge from above. A suction hose connected to the suction port, a discharge pipe continuous from the barge to the sludge collection site, a suction and discharge tank installed on the barge and connected to the suction hose and the discharge pipe, and this suction and discharge tank. It has a compressor that sends compressed air and a vacuum generator that generates a vacuum, and the suction and exhaust tank has two tanks arranged side by side, and the end of the suction hose is connected to the side of both tanks through a check valve. The base end of the discharge pipe is connected from the top of both suction and exhaust tanks to the vicinity of the inner bottom surface through a check valve, and the compressor and vacuum generator are connected to the sides of each suction and exhaust tank through supply pipes. An underwater sludge recovery device characterized in that the supply pipe is connected in communication with the supply pipe, and a suction/discharge switching valve is connected in the middle of the supply pipe to operate by sensing a signal from a level meter provided in the suction/discharge tank. (3) The operating means, the suction pipe, the discharge pipe, and the suction and discharge tank are installed on a first barge that is self-propelled by a crawler;
A compressor, a vacuum generator, and a suction/exhaust switching valve are connected to the barge and installed on a second barge that can float on the water surface, and a supply pipe is arranged between the first and second barges. The underwater sludge recovery device according to claim (2). (4) The attachment has a substantially cylindrical casing and a substantially cylindrical drum that is rotatable along the side surface of the casing and has an open bottom, and the sludge suction port of the attachment is located at the bottom of the casing. The underwater sludge recovery device according to claim 2 or 3, which is formed with an opening.