JP5753210B2 - Processing method for constructing algae reef using dredged soil - Google Patents

Description

The present invention relates to a processing method for processing dredged soil (such as sludge) generated by dredging work so as to be usable for constructing algae reef.

In recent years, in order to solve the problem of pollution caused by sludge accumulated in closed inner bays and harbors, dredging projects have been developed in various parts of the country. The problem is emerging anew.

Various techniques for forming blocks as structural materials from clay have been proposed. That is, by using, for example, an algal reef using such a block made of dredged soil, effective utilization (processing) of dredged soil can be achieved.

However, in the technology developed so far, the kneaded material and the solidified material are kneaded and solidified, and then the kneaded material is kneaded with the solidified material in a batch manner to form a block. It is unsuitable. In addition, it takes enormous costs and time to construct a fixed factory plant to form blocks, and especially when the factory plant is away from the port, etc. The cost of carrying in to the factory plant and the cost of carrying out the block formed in the factory plant to the port or the like become expensive.

The present invention has been made in consideration of the above-described matters, and its purpose is to provide a treatment method for constructing algae reef using dredged soil, suitable for mass treatment of dredged soil and mass construction of algae reef. It is to provide.

In order to achieve the above object, the processing method for constructing an algal reef using dredged soil according to the present invention includes dredging, solidifying material, and blast furnace in order to construct the algal reef using dredged soil. This is a treatment method for obtaining a block for algae reef formation after kneading slag, and the continuous solidification system used for the kneading involves continuously stirring the clay, the solidified material, and the blast furnace slag. A hydraulic continuous mixer for conveying, a supply means for supplying the clay measured to the hydraulic continuous mixer, and an input means for supplying solidified material and blast furnace slag to the hydraulic continuous mixer; The flow rate meter for measuring the flow rate of the clay and a pressure feed pump capable of adjusting the flow rate are used as the supply means, and the hydraulic continuous mixer is carried by a self-propelled traveling vehicle body. Is possible Together with the upper part of the hydraulic type continuous mixer, detachably mounted lid having a connection port pipe is connected leading to a downstream side of said feeding means, said lid, and can be changed the mounting posture more A feature is that the direction or the position of the connection port is changed in accordance with the change of the mounting posture (claim 1).

In the processing method for constructing an algal reef using the dredged soil, the ceiling surface of the stirring and conveying path for the dredged soil, the blast furnace slag and the solidified material in the hydraulic continuous mixer may be flattened. (Claim 2).

In this invention, the processing method for constructing an algal reef using dredged soil suitable for mass processing of dredged soil and mass construction of algae reef is obtained.

That is, in the processing method for constructing an algal reef using the clay of the invention according to each claim of the present application, a kneading of the clay is performed by using a pump as a supply means for supplying the clay to a hydraulic continuous mixer. Therefore, the processing efficiency can be significantly increased as compared with the case of kneading in a batch system, which is suitable for mass treatment of dredged soil and mass construction of algae reefs. That is, in the present invention, a processing capability of about 65 to 150 m ³ / h can be obtained. In addition, conventionally, when the clay was put into the hopper provided on the upstream side of the agitating and conveying apparatus, it was necessary to adjust so that the clay would not overflow from the hopper. Accordingly, such adjustment can be made unnecessary. In addition, the sludge is added to the dredged soil sent by the pump, and the flow rate of the dredged clay is measured with a flow meter to strictly control the pumped amount. Solidification can also be expected. Moreover, a simple plant composed of a hydraulic continuous mixer or the like that can be transported by a self-propelled traveling vehicle body may be installed, for example, in a yard formed near the coast. (In the case of a conventional fixed-type factory plant, about half a year is required for installation.) The installation period can be shortened and installation costs can be greatly reduced. It is also possible to greatly reduce various expenses such as transportation. In addition, by changing the direction or position of the connection port according to the arrangement relationship between the hydraulic continuous mixer and the supply means or the hopper, it is possible to facilitate the connection work of the pipe to the connection port.

In the processing method for constructing an algal reef using the dredged soil of the invention according to claim 2, the dredged soil conveyed in the agitating conveyance path is more than the case where the ceiling surface of the agitating conveying path is arched. It will hit the ceiling surface quickly when it is flipped up, the movement speed in the transport direction will increase accordingly, the processing efficiency will be improved, and at the same time, the grain size etc. of the clay will be processed more uniformly In this case, the high quality of the constructed alga reef is ensured.

It is explanatory drawing which shows roughly the structure of the continuous solidification system used for the processing method for constructing an algal reef using the dredged material which concerns on one embodiment of this invention. It is a front view which shows roughly the structure of the hydraulic continuous mixer of the said continuous solidification system. It is a fragmentary perspective view which shows the structure of the said hydraulic continuous mixer roughly. It is a front view which shows roughly the structure of the container carrying the said hydraulic continuous mixer.

Embodiments of the present invention will be described below with reference to the drawings.

The processing method for constructing an alga reef using the dredged soil according to the present embodiment (hereinafter abbreviated as “main method”) is to solidify the dredged soil and the solidifying material and then solidify the algae reef. It is for obtaining the block for.

In this construction method, the continuous solidification system shown in FIG. 1 is used for kneading the clay, the solidification material, and the blast furnace slag. This continuous solidification system includes an agitating and conveying device 1 for continuously agitating and conveying the clay, the solidified material and the blast furnace slag, and a supply means 2 for supplying the measured clay to the agitating and conveying device 1. The agitating and conveying apparatus 1 is provided with charging means 3 and 4 for charging the blast furnace slag and the solidified material.

In the continuous solidification system shown in FIG. 1, the clay is first put into the hopper 5 by, for example, a backhoe. Here, the clay put into the hopper 5 is a muddy water that has been passed through a vibrating screen in advance to remove impurities, and has been uniformly unraveled (mud).

The clay put into the hopper 5 as described above is sent to the stirring and conveying device 1 by the supply means 2. In other words, the supply means 2 includes a pressure feed pump 2b that is driven by a generator (150KVA) 2a and can adjust the flow rate, and the pressure feed pump 2b measures the flow rate of the clay 2c, 2d (any one). The hopper 5 and the agitation transport device 1 are connected via a flow meter.

The agitating / conveying device 1 is constituted by a hydraulic continuous mixer (special continuous mixer) shown in FIG. 2, and a stirring / conveying mechanism (not shown) including a combination of a moving blade, a stirring blade, and a cutting blade is provided inside the drum 6. The piping 2d (refer FIG. 1) connected to the downstream of the supply means 2 is connected to the connection port 7 (refer FIG. 2, FIG. 3). Then, the clay introduced from the connection port 7 moves from the left hand side to the right hand side in FIG. Since the discharge conveyor 9 (see FIG. 1) is disposed below the discharge port 8, the clay can be continuously led out from the discharge port 8.

Here, while the clay is transported in the stirring and transporting device 1, for example, powdered blast furnace slag that is charged into the stirring and transporting device 1 from the blast furnace slag charging means 3 and the stirring and transporting device from the solidifying material charging means 4. 1 is mixed with a solidifying material (in this example, blast furnace cement) charged into the inside. As shown in FIG. 1, the blast furnace slag charging means 3 includes a silo (30t) 3a as a blast furnace slag reservoir, and a feeder 3b such as a screw feeder. Similarly, the solidifying material charging means 4 includes a silo (30t) 4a as a solidifying material storage unit and a feeder 4b such as a screw feeder. The supply amount of the blast furnace slag and the solidified material to the agitating and conveying apparatus 1 by the feeders 3b and 4b reflects the measurement result (powder amount of dredged soil) by the flow meter installed in either the pipe 2c or 2d by inverter control. Adjustment is possible, and the input amount is confirmed by calibration.

In this example, in the agitating and conveying apparatus 1, about 500 to 600 kg (about 250 to 300 L) of cement and about 900 kg (about 390 L) of blast furnace slag are mixed with 350 L of clay (muddy water). .

By the way, the hardening of the clay starts with the addition of the solidification material and the blast furnace slag, and the conveyance resistance thereof increases. Therefore, in this embodiment, the agitation conveyance mechanism built in the agitation conveyance device 1 has a hydraulic pressure with a large torque. The clay is driven by the drive means 10 so that the clay can be agitated and conveyed quantitatively and continuously while the conveyance amount of the clay can be adjusted.

Moreover, the stirring conveyance apparatus 1 is used in the state mounted in the container 11 shown in FIG. 4 which can be conveyed with a self-propelled traveling vehicle body, for example. Therefore, the container 11 is provided with a plurality of doors 11a that can be opened and closed, and is configured such that the pipe 2d and the input means 3 and 4 can be extended and connected from the outside to the inside of the container 11.

Further, as shown in FIG. 3, the drum 6 of the agitating and conveying apparatus 1 has a shape in which the upper part of the circle is cut horizontally in a longitudinal sectional view, and a lid 12 having a substantially rectangular shape in a plan view that can be attached and detached is placed on the upper part. In the transport direction (see FIG. 2). Therefore, the ceiling surface of the inner space of the drum 6 that becomes the stirring and conveying path for the clay is flat, and the clay transported in the drum 6 jumps from the case where the longitudinal sectional view of the drum 6 is a perfect circle. When it is lifted, it hits the ceiling surface quickly, the movement speed in the transport direction is increased, the processing efficiency is improved, and at the same time, the quality of the soil is reduced so that the variation in grain size is reduced. It becomes possible to process.

Further, as shown in FIG. 3, each lid 12 is provided with an insertion hole 14 inserted by a substantially Λ-shaped locked portion 13 protruding from the upper portion of the drum 6. By inserting the locking piece 15 into each locked portion 13, the lid 12 is locked in a closed state. In FIG. 3, 16 is a chain, 17 is a handle, and the locking piece 15 is connected to the drum 6 by the chain 16.

As shown in FIG. 3, a connecting cylinder 18 that forms the connection port 12 is connected to the first lid 12 a on the most upstream side, and the connection port 7 is connected to the inside of the drum 6 via the connection cylinder 18. Communicate with. Further, as shown in FIG. 2, a second lid 12b and a third lid 12c are provided in this order on the downstream side of the first lid 12a, and the second lid 12b is provided with blast furnace slag charging means 3. An opening as a connection port inserted through the pipe 3c connected to the downstream side is provided, and an opening as a connection port inserted through the pipe 4c connected to the downstream side of the solidifying material charging means 4 is provided in the third lid 12c. .

Here, each lid 12 has a rectangular shape, and the mounting posture to the drum 6 can be changed in two ways. Since the connecting cylinder 18 of the first lid 12a does not face directly upward and is bent sideways, the orientation or position of the connection port 7 can be changed in accordance with the change in the mounting posture of the lid 12a. it can. Therefore, by changing the orientation or position of the connection port 7 in accordance with the arrangement relationship between the agitation transport device 1 and the supply means 2 or the hopper 5, it is possible to facilitate the connection work of the pipe 2d to the connection port 7. Become. With the aim of achieving the same effect, the opening provided in the second lid 12b and the opening provided in the third lid 12c may be provided at positions removed from the center in plan view of the lids 12b and 12c, respectively. .

In FIG. 1, 19 is a centralized control panel that controls the entire system, and 20 is a generator (220 KVA).

The clay kneaded with the blast furnace slag and the solidified material by the continuous solidification system shown in FIG. 1 is led out from the stirring and conveying device 1 by the discharge conveyor 9, and then a layer having a thickness of about 1 m is formed in the mold outside the figure. It is laid down to do. And when this layer is in a soft state that is not solidified, holes are made in a grid pattern at intervals of about 1 m using, for example, a hydraulic breaker, and after curing for a few days, between the holes that are in the grid pattern in the solidified layer. Is crushed with, for example, a hydraulic breaker to obtain a block for forming a 1 m square alga reef. And an algal reef can be formed by throwing the obtained block into the sea.

In addition, this invention is not limited to said embodiment at all, Of course, it can change and implement variously in the range which does not deviate from the summary of this invention. For example, it can be modified as follows.

For example, the hopper 5 may be mounted in the container 11 as well as the stirring and conveying device 1.

The lid 12 may have a square shape in plan view, and the mounting posture of the lid 12 on the drum 6 may be changed in four ways.

The block is not limited to the one for forming algae reef, and may have a shape suitable for forming a fishing reef, for example.

Only one type or three or more types of solidifying materials may be kneaded in the kneaded material.

Needless to say, the above modifications may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Stirring conveyance apparatus 2 Supply means 2a Generator 2b Pressure feed pump 2c Pipe 2d Pipe 3 Blast furnace slag input means 3a Silo 3b Supply machine 3c Pipe 4 Solidification material input means 4a Silo 4b Supply machine 4c Pipe 5 Hopper 6 Drum 7 Connection port 8 Exhaust Exit 9 Discharge conveyor 10 Driving means 11 Container 11a Door 12 Lid (12a-12c) 13 Locked portion 14 Insertion hole 15 Locking piece 16 Chain 17 Handle 18 Connection cylinder 19 Centralized control panel 20 Generator

Claims (2)

In order to construct algal reef using dredged soil, kneaded clay, solidification material and blast furnace slag are solidified and then solidified to obtain a block for algal reef formation, which is a continuous solidification used for the kneading The system includes a hydraulic continuous mixer for continuously stirring and conveying the clay, the solidified material, and the blast furnace slag, and supply means for supplying the measured clay to the hydraulic continuous mixer And a feeding pump for feeding the solidified material and blast furnace slag to the hydraulic continuous mixer, and a flowmeter for measuring the flow rate of the clay as the supply unit, and a pressure-feed pump capable of adjusting the flow rate it is intended to use the preparative, together with the hydraulic continuous mixer can be transported by the vehicle body of the self-propelled, on top of the hydraulic type continuous mixer, a pipe connected downstream of the supply means is connected Detachably mounted lid having a connection port, the lid is configured so that the direction or position of the connection port with the change of and the mounting orientation can be changed the mounting posture more is changed A processing method for constructing algae reef using dredged soil. The processing method for constructing an algal reef using dredged soil according to claim 1, wherein a ceiling surface of the dredged soil, blast furnace slag and agitation transport path of the solidified material in the hydraulic continuous mixer is flattened. .

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