JPS63160933A - Unloader falling sludge recovery method - Google Patents

Abstract

PURPOSE:To dispense with a falling sludge recovery job on a quay, by installing the equipment with a pump-up function and also a sensor detecting a falling sludge water level in a recovery pit. CONSTITUTION:A recovery pit 11 is set up in the lower part of a tail pulley 9 to recover falling sludge 10. A sensor 12 for detecting a water level of the falling sludge inside the pit and a sand pump 13 for pumping up the falling sludge 10 inside the pit both are installed in this recovery pit 11, while a falling sludge conveyor pipe 14 for conveying the falling sludge 10 inside the recovery pit to a receiving conveyor 7 is connected to a sand pump discharge port. A falling sludge water level inside the recovery pit is detected by the sensor 12, and a sand pump 13 is operated by an on-signal to be emitted when the level comes to the specified level, mounting the falling sludge inside the recovery pit 11 on bulk material 4 placed on the receiving conveyor during operation through the falling sludge conveyor pipe 14.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for collecting falling water from a bulk material dumping machine such as an unloader, and particularly to a method for preventing seawater pollution caused by falling water.

<Prior Art> When handling bulk materials (ore, coal, etc.) using an unloader, the loose materials that generate dust are sprinkled with water in the unloader hopper to prevent dust generation.

However, the water-sprinkled pellets and the like fall from the hopper onto the conveyor and then flow down from the conveyor tail, and fall from the conveyor tail in the unloader onto the quay or onto the sea. In addition, a similar phenomenon occurred with bulk materials that did not generate dust but had a high moisture content.

In order to prevent these falling phenomena, the surface of the conveyor inside the unloader is partitioned with a rubber plate at the tail of the conveyor inside the unloader as shown in FIG. 2, but this has not been completely prevented.

Therefore, there are the following problems when handling bulk materials using an unloader. ■It is necessary to collect falling water on the quay. ■ Water falls from the quay or directly onto the sea surface, causing seawater pollution. ■Loose materials that fall into the river are treated as miscellaneous ore.

<Problems to be Solved by the Invention> The present invention solves the above-mentioned problem in bulk material handling using conventional unloaders, so even if the loose material falls from the conveyor tail, the above-mentioned problem can be solved. This was done in order to provide an unloader downflow recovery device that does not cause this.

<Means for Solving the Problems> As a result of extensive research into methods for collecting falling water, the inventors of the present invention have solved the above-mentioned problem by installing a device to collect falling water that has fallen from the conveyor tail. This invention was based on this knowledge and led to the creation of this invention.

The present invention installs a falling water recovery focus at the bottom of the conveyor tail inside the unloader machine, and also includes equipment with a pump-up function such as a sand pump and a sensor such as a flow switch that detects the difference in water level of falling mud in the recovery pit. The sand pump can be started and stopped by the on/off signal.The on-signal from the sensor sends the pumped up flow into the recovery pinto through the falling mud transport pipe connected to the sand pump discharge port, and guides it to the receiving conveyor. This is an unloader downflow recovery method that discharges onto bulk materials (ore, coal, etc.).

For Kusaku The present invention will be explained with reference to FIG. 1'.

The loose materials 4 that have been unloaded by the unloader grab bucket l are stored in the hopper 2.The loose materials 4 that generate dust are stored inside the dust-proof wall 15 from the grab bucket 1 to the hopper 2.
Water is sprinkled by a water sprinkler device 3 to prevent dust from being generated during the process of falling. Generally, the system is such that water is lost for a certain period of time as soon as the grab bucket is opened. Hopper 2
The bulk materials 4 accumulated in the machine are cut out by a feeder 5, conveyed by an in-machine conveyor 6, and sent to a receiving conveyor 7. However, during the process of conveying some of the loose materials 4 to the receiving conveyor via the feeder 5, the in-machine conveyor, and the conveyor 6, a phenomenon occurs in which a falling stream 10 flows in the direction of the tail pulley 9. In order to prevent the falling stream 10 from flowing to the tail pulley 9 side, a rubber partition plate 8 is installed between the feeder 5 and the tail pulley 9.
However, in the present invention, a recovery pin 11 is installed at the bottom of the tail pulley 9 in order to collect this falling stream 10. did. This recovery pit is equipped with a sensor 12 for detecting the water level of the falling water in the pit, and a sand pump 13 for pumping up the falling water 10 in the pit. A sludge transport pipe 14 for transporting the sludge 10 to the receiving conveyor 7 is connected thereto. Here, the falling sludge water level in the collection pit is detected by the sensor 12, and when it reaches a certain level, the sand pump is activated by an on signal sent to send the fallen sludge water level in the collection pit through the sludge transport pipe 14. The bulk material 4 is placed on the receiving conveyor 7 which is in operation. According to the method of the present invention, falling water from the conveyor tail can be completely prevented from falling onto the ground or the sea.

<Example> A recovery pit equipped with a sand pump, a sensor, etc. used in the present invention was installed at the bottom of the conveyor tail of an unloader with a lifting capacity of 1.500 t/h, and the loose waste on the receiving conveyor was passed through the falling mud transport pipe. The falling stream within the collection focus was conveyed onto the object.

Despite continuous operation for 12 months, no water fell onto the quay or into the sea.

<Effects of the Invention> According to the method of the present invention, the falling water from the conveyor tail section in the unloader machine does not fall onto the quay wall, and the work of collecting the falling water on the quay wall is no longer necessary. In addition, there is no need to worry about seawater contamination, and falling water is no longer treated as miscellaneous minerals.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the four inventions, Figure 2 is A-A in Figure 1.
FIG. l...Grab bucket, 2...Hopper, 3...
・Water sprinkler, 4...Loose items, 5...Feeder,
6... In-flight conveyor, 7... Receiving conveyor, 8
...Rubber partition plate, 9...Tail pulley, 10.
...Skin mud, 11...Collection pit, 12...Sensor, 13...Sand pump, 14...Sludge transport pipe,
15...Dustproof plate patent applicant Kawasaki Steel Corporation Figure 1 Figure 2 Figure 6

Claims (1)

[Claims] A sludge collection pit is installed at the bottom of the conveyor tail inside the unloader machine, and equipment with a pump-up function such as a sand pump and sensors such as a flow switch that detect the sludge water level are installed in the collection pit to turn it on and off. The sand pump can be operated and stopped by a signal.The fallen sludge pumped up in the recovery pit is guided to the receiving conveyor through the sludge transport pipe connected to the sand pump discharge port, and the loose materials (ore, ore, A method for collecting sludge from an unloader, which is characterized by discharging it onto a surface (coal, etc.).