JPS582136B2 - Method for preventing clogging in consolidated cargo reslurry equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing clogging in a consolidated cargo reslurry equipment.

Iron ore powder is loaded into the cargo hold in the form of a slurry at the loading port, but during the berth and voyage after loading, it settles due to the difference in specific gravity with water, and is deposited in a dehydrated, consolidated state.

Iron ore powder in such a consolidated pile is hard and therefore cannot be easily unloaded by grab packets.

In addition, iron ore powder in a consolidated pile is not only hard, but also adheres to the side walls and bottom of the ship, so even if it is possible to unload using grab packets, it will only be at the bottom of the hatch and on the bottom of the ship. Therefore, complete unloading cannot be expected.

For this reason, a method has recently been adopted in which iron ore powder is injected with high-pressure liquid from above or below, and is unloaded using a pump transportation system while reslurrying the powder.

The reslurry equipment for consolidated cargo is as shown in Figure 1.
It consists of a well 2 provided at the bottom of the hold 1 and a nozzle 3 protruding from the center of the well 2 to the inner bottom of the hold 1, and the nozzle 3 is rotatable around its axis X.

When reslurrying the consolidated cargo 4 using this reslurrying device, high pressure water is pumped to the nozzle 3 by the high pressure water pump 5, and high pressure jet water is sprayed from the nozzle 3 onto the surrounding consolidated cargo 4. Cut down and re-slurry.

The resulting slurry is passed through the two Sekiguchis above the well to Well 2.
and then unloaded through the unloading pipe 6.

The nozzle 3 is installed at the bottom of the hold before the slurry is loaded at the loading port, so when the slurry is introduced into the hold 1 or while the slurry has fluidity after being introduced, the slurry is transferred to the nozzle 3. It may enter the interior through the opening at the tip of the ship, and it may be consolidated and hardened by the vibrations and shaking of the ship.

The cargo consolidated and hardened inside the nozzle must be removed prior to re-slurrying the consolidated cargo in the hold 1 during unloading, and this is accomplished by pumping high-pressure water to the nozzle 3.

However, depending on the degree of consolidation and hardening inside the nozzle 3, it may not be possible to remove it using the high-pressure water.

The same thing can also be said about well 2.

The present invention has been made in view of the above, and its gist is that, before the slurry is introduced into the cargo hold 1, the opening of the consolidated cargo reslurry device is filled with soluble or flammable solvents other than water. The purpose is to fill the opening with the above material and close the opening.

The opening in the consolidated cargo reslurry device is nozzle 3.
and the upper opening 2A of the well 2.

In the present invention, a material that is soluble in a solvent other than water or combustible is used as the material to fill the opening in the consolidated cargo reslurry equipment, so that the slurry Intrusion into the inside of the consolidated cargo reslurry equipment through the opening and consolidation hardening can be prevented from occurring. Also, during reslurry, a solvent other than water is supplied to the packed cargo to prevent the filling. The filling can be dissolved or ignited by a fuse and burned to extinguish the filling.
When the consolidated cargo 4 is reslurried, the high-pressure jet water from the nozzle 3 is made to directly collide with the surrounding consolidated cargo 4 to break it down and reslurry it.

Therefore, reslurry efficiency can be improved.

In Figure 2, a stopper 7 is made of a material soluble in a solvent other than water, and is inserted into the nozzle tip opening 3A before slurry is introduced into the hold 1. High-pressure water pumping line (not shown).

) through which a solvent other than water is supplied to the stopper 7, and the stopper 7
This shows an example of something that dissolves and annihilates.

In addition, FIG. 3 shows that in the case shown in FIG. 1, the thin tube 8 for supplying a solvent other than water is exposed to the inside of the side wall of the nozzle tip opening 3A, and when reslurrying, the solvent is supplied as shown in FIG. An example is shown in which a solvent other than water is connected to the plug 7 through the thin tube 8 to dissolve and eliminate the plug 7.

In this way, when the high-pressure water is pumped to the nozzle 3 after the plug 7 is dissolved, the high-pressure jet water 9 from the nozzle 3 collides with the surrounding consolidated cargo 4 to break it down and re-slurry it.

FIG. 5 shows the case where the present invention is applied to a reslurry device of a different type from that described with reference to FIGS. 1 to 4.

In FIG. 5, 10 is a well, 11 is a slurry discharge pipe connected to the well 10, 12 is an intervening valve at the base of the slurry discharge pipe 11, and 13 is movable between the inside of the well 10 and the bottom of the warehouse 1. It is a nozzle block that can rotate around its axis X, and a nozzle 1 is installed inside this nozzle block 13.
4 is installed inside.

In such a reslurry device, the nozzle block 13 is stored inside the well 10 before and after the slurry is introduced into the hold, and is projected to the bottom of the hold as shown by the imaginary line during reslurry formation. .

Therefore, before charging the slurry into the hold, with the nozzle block 13 stored inside the well 10, a fluid of the above-mentioned material dissolved in a volatile solvent other than water is fed into the well 10. By volatilizing the volatile solvent inside and filling the well 10 with the above material, it is possible to prevent the slurry from entering the well 10 or the nozzle 14 and being consolidated and hardened.

In addition, when re-slurrying consolidated cargo, well 10
A solvent supply thin tube 15 is connected to the inside, and if a solvent other than water is supplied to the filling material 16 through the feeding thin tube 15, the filling material 16 is dissolved, and then a high-pressure jet is immediately released from the nozzle 14. By injecting water, the consolidated cargo 17 near the well upper opening 10A can be broken down and reslurried.

In FIGS. 1 to 5, the plug 7 and the filler 16 are made of foamed polystyrene or other resin that is soluble in volatile solvents such as thinner and acetone and insoluble in water.

The plug 7 and the filler 16 have considerable strength to withstand the load of the compressed cargoes 4 and 17.

In the above embodiments, the case where the filler was formed of a material soluble in a solvent other than water was explained, but in addition to this, although not shown, the filler was formed with a combustible material, such as a mixture of plastic and an oxidizing agent. A similar effect can be obtained even if the product is made from .

In this case, in re-slurrying, the filled material is ignited using a fuse and combusted.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the hull, Figure 2 is an enlarged longitudinal sectional side view of the main part when the filling material is used as a plug, and Figures 3 and 4 are enlarged longitudinal sectional side views of the main part showing modifications of Fig. 2. 5 are longitudinal sectional side views of main parts showing another embodiment. 1... Hold, 2, 10... Well, 2A, 10A... Well upper opening, 3, 14... Nozzle, 3A... Nozzle tip opening, 4, 17... Consolidated cargo, 7... Plug, 8,1
5...Solvent supply capillary, 16...Filling material.

Claims (1)

[Claims] 1. Before the slurry is introduced into the ship's hold, the opening in the consolidated cargo reslurry device is filled with a flammable or soluble material in a solvent other than water, and the opening is closed. Method for preventing clogging in consolidated cargo reslurry equipment.