JPS6233680Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vessel for carrying slurry such as coal.

Generally, coal is transported overland from the coal-producing area to the port of shipment, and then transported by sea from the port by ship. Recently, in order to reduce the cost of overland transportation and to streamline loading and unloading at ports,
In coal-producing areas, powdered coal is dispersed in water to form coal slurry, which is then transported to a shipping port by pipeline and loaded onto a carrier in the form of slurry via pipeline. With this method, coal can be loaded onto a ship without the ship needing to directly dock at the pier.
This is extremely advantageous as it allows automatic loading using floating hoses connected to onshore facilities via single-point mooring buoys, etc. However, normal coal slurry loaded by pipeline contains, for example, about 50-60% water by weight, so if this is transported by ship as is, the amount of coal carried will be reduced by the amount of water, resulting in poor transport efficiency and extremely high transport costs. In order to increase the efficiency of transporting coal by ship, it is necessary to dehydrate the coal slurry as much as possible in the hold during loading operations and load as much coal as possible. Also,
When coal slurry is loaded into the hold of a ship, the coal particles sink to the bottom and some of the slurry water comes out on top of the coal particles. Therefore, if this is transported by ship as is, if the ship rolls while sailing, the slurry water above the coal particles will move and increase the ship's rolling, which is dangerous.
This water may impact the hatch cover or flow out of the hold. The same applies if the ship rolls sideways during the loading of coal slurry. In order to eliminate such problems and to increase the efficiency of the loading of coal slurry, it is necessary to drain the slurry water that appears on top of the coal particles during the loading operation as quickly as possible. For this reason, an overflow water drain with a dewatering filter is provided on the wall of the hold of a coal slurry carrier, from the bottom to the hatch coaming.

A relatively fine wire mesh is used for this type of overflow water outlet dewatering filter to discharge only slurry water and prevent pulverized coal from flowing out as much as possible. There is a risk that water may adhere to the filter, and as a result, the opening area of the overflow water outlet, which was initially set to an appropriate value, decreases, and the dewatering function deteriorates. If the dewatering function of the overflow water outlet deteriorates, there is a risk that slurry water will overflow onto the hatch combing, and the dewatering time will be long, and loading operations may be interrupted, resulting in longer cargo handling times.

The purpose of this invention is to provide a slurry carrier in which there is less risk of dirt and the like adhering to the dewatering filter at the overflow water outlet.

A slurry carrier based on this invention is a slurry carrier equipped with an overflow water outlet with a dewatering filter on the wall of the cargo hold.The slurry carrier is a slurry carrier equipped with an overflow water outlet with a dewatering filter attached to the wall of the cargo hold. A band-shaped moving filter is provided, and a drum for winding up the moving filter is provided on the upper deck.

According to this invention, the moving filter is installed so as to cover the entire surface of the hold side of the overflow water outlet, so that dirt and the like are removed by the moving filter, and there is no risk of it adhering to the dewatering filter of the overflow water outlet. few. Since the moving filter has a band shape, the opening area of this portion can be set to a sufficiently large value. Therefore, even if dirt or the like adheres to the movable filter, the dewatering function of the overflow water outlet will not deteriorate. Further, since a drum for winding up the movable filter is provided on the upper deck, it is possible to clean the movable filter by removing dust attached thereto while winding it up.

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

The drawing shows a coal slurry carrier, which is equipped with a plurality of holds 2 at the front and rear, which are partitioned by a transverse bulkhead 1 having a double structure. The hold 2 has a double side structure and a double bottom structure. The front hold 2 is connected to the front wall of the double transverse bulkhead 1.
The rear wall 3 of the ship is constructed, and the front wall 4 of the hold 2 on the rear side is constructed by the rear wall.

Three pairs of vertically elongated guides 6 extending from the bottom to the hatch coaming 5 are provided on the rear wall 3 of the hold 2. Each guide 6 is a plate-shaped member fixed to the front surface of the rear wall 3, that is, the surface on the side of the hold 2, and opposing guide grooves 7 are provided at the front edge of each pair of guides 6. Furthermore, each die 6 is provided with a plurality of water passage ports 8 with dehydration filters at predetermined intervals vertically.

On the part of the rear wall 3 sandwiched between each pair of guides 6,
Overflow water outlet 10 with multiple dewatering filters
are provided vertically at a predetermined interval. Although not shown, a part of the double structure portion of the transverse bulkhead 1 serves as an overflow water reservoir leading to the overflow water outlet 10, and within this overflow water reservoir there is a water reservoir for returning the overflow water to land. A drain pipe is provided leading to the overflow water drain line. Further, at the bottom of the hold 2, there is provided a drain port with a dewatering filter that communicates with the overflow water discharge line and a separate bilge suction line.

The front wall 4 of the hold 2 is also provided with a guide 6 and an overflow water outlet 10 with a dewatering filter similar to those described above. Note that these may be provided only on either the rear wall 3 or the front wall 4, or may be provided on the side wall 12 of the hold 2.

A movable filter winding drum 14 is provided on the upper deck 13 of the ship. It is becoming fixed. When slurry loading work is not being performed, a plurality of band-shaped moving filters 15 are wound around this drum 14.

Dewatering filter 11 of overflow water outlet 10
is made of relatively fine wire mesh to prevent pulverized coal from flowing out as much as possible, and the dewatering filter 9 and moving filter 15 of water inlet 8 are made of relatively coarse wire mesh that does not allow dust to pass through. It is structured accordingly. In addition, the moving filter 15
A suitable weight (not shown) is attached to one end of the .

When loading slurry, the movable filter 15 is installed between each pair of guides 6 in the following manner.

That is, first, the drum 14 is fixed at a position corresponding to one of the pair of guides 6, and the movable filter 15 is moved out a little so that the tip with the weight faces the guide grooves 7 on both sides, and then the movable filter 15 is further moved.
Bring out. In this way, the moving filter 15
moves down along the guide groove 7 due to the weight of the weight, and eventually the weight reaches the lower end of the guide 6 and stops. When the movable filter 15 is attached to the guide 6 in this manner, the entire front side of the overflow water outlet 10 located between the pair of guides 6 is covered by the movable filter 15. Next, guide 6
The remaining portion of the movable filter 15 attached to the drum 14 is removed from the drum 14 and fixed in a suitable position on the upper deck 13 or the hatch coaming 5. Then, the drum 14 is moved and the movable filter 15 is attached between each of the other pairs of guides 6 by the same operation as described above.

In this way, move the moving filter 15 to all the guides 6.
When coal slurry is continuously poured into the hold 2 with the tank installed, the coal particles in the slurry settle to the bottom, and some of the slurry water comes out on top of the coal particles. Then, this water is quickly discharged from the overflow water discharge ports 10 before and after the hold 2, accumulates in an overflow water reservoir, and is sent back to shore through an overflow water drainage line by a drainage pump (not shown). During loading work, the entire surface of the overflow water outlet 10 on the cargo hold 2 side is covered by a movable filter 15 that can prevent debris from passing through, so debris and the like adhere to the filter 11 of the overflow water outlet 10. There is little risk. Further, since the opening area of the movable filter 15 and the water inlet 8 is sufficiently larger than that of the overflow water outlet 10, the movable filter 15 or the water inlet 8
Even if dust or the like adheres to the filter 9, the dewatering function of the overflow water outlet 10 will not deteriorate.

When the slurry loading work is completed, the drums 14 are sequentially moved and all the movable filters 1
5 one by one. Then, while winding up each movable filter 15, dust and the like attached thereto are removed. In addition, overflow water outlet 10
Pulverized coal and fine dust adhering to the filter 11 are washed away by a cleaning device installed at an appropriate location such as in the hold of the ship.

In the above embodiment, a weight is attached to one end of the movable filter 15 in order to lower the movable filter 15 along the guide groove 7. For example, a cable attached to one end of the movable filter 15 is attached to the lower end of the guide 6. The cable is guided onto the upper deck 13 through a provided pulley or the like, and when the movable filter 15 is lowered, the movable filter 15 is let out while winding it up, and when the movable filter 15 is raised, the movable filter 15 is wound up while being let out. You can also do this. Further, in the above embodiment, one drum 14 is provided for a plurality of moving filters 15, but each moving filter 15 may be provided with a drum, respectively.

This idea can also be applied to slurry carriers for materials other than coal.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a perspective view of a part of the hold of a coal slurry carrier as seen diagonally from the front; Fig. 2 is an enlarged sectional view of Fig. 1;
FIG. 3 is a sectional view taken along the line of FIG. 2. 2... Hold, 3... Wall of the hold, 10... Overflow water outlet, 11... Dewatering filter, 13...
...Upper deck, 14...drum, 15...movable filter.

Claims (1)

[Scope of utility model registration request] In a slurry carrier in which an overflow water outlet 10 with a dewatering filter is provided on the wall 3 of the hold 2, a removable device is installed along the wall 3 of the hold 2 so as to cover the entire surface of the overflow water outlet 10 on the hold 2 side. This slurry transport ship is provided with a band-shaped moving filter 15 and a drum 14 for winding up the moving filter 15 is provided on an upper deck 13.