JP2021116171A - System and method for delivering particulate air - Google Patents

Abstract

To provide a system and a method for delivering particulate air that can reduce operator's work when delivering particulate to a ground silo by simultaneously operating two or more cellar pumps of a ship.SOLUTION: A system for delivering particulate air 10 in the present invention comprises a pressure sensor 20 that measures an inlet pressure to a dust collector 8 of a ground silo 7 when simultaneously delivering particulate to a ground silo 7 from two or more cellar-type air delivery units of a ship, freight remaining amount sensors 30a, 30b that detect remaining amounts of particulate to be supplied to respective ones of the cellar-type air delivery units, an inclination sensor 40 that detects an inclination of the ship, and a control section 50 that controls to regulate the air flow rate through the cellar-type air delivery units in a manner that a measurement value of the pressure sensor 20 satisfies a set value and, when a measurement value of the freight remaining amount sensor 30a, 30b exceeds a remaining amount-set value or a measurement value of the inclination sensor 40 goes below a set value, alternately operates a rake-up unit 9 for the particulate and eliminates a load shortage or an inclination of the ship.SELECTED DRAWING: Figure 1

Description

The present invention relates to a powder / granular material air delivery system capable of continuously delivering powder / granular material in a tank, and a powder / granular material air delivery method.

When a large amount of powder or granular material is transported by a dedicated ship and unloaded to a ground silo in a port, a powder or granular material air delivery device (hereinafter, also referred to as a ceramic air delivery device) is used. In the normal operation method, the powder or granular material is air-delivered into the receiving silo installed on the ground by the air delivery device installed on the ship that has carried the powder or granular material.
Generally, the powder / granular material air delivery device is often a catamaran type in two tanks, and automatically repeats receiving or discharging alternately so that the sending work can be performed almost continuously. This pumped air is pumped by an engine-driven compressor installed on the ship. When the amount of powder or granular material of the ship to be transported is large, a plurality of sets of air delivery devices may be installed in two tanks and simultaneously operated so that the unloading work can be completed in a short time.

In addition, the specifications of the receiving equipment at each port vary, and differ depending on the receiving destination. As an example, the capacity of the ground silo is limited by the capacity of the dust collector installed on the silo side. At this time, the amount of air sent out per hour and the amount of air flow are in a proportional relationship, and when sending out in a short time, not only the size of the ground silo but also the ability of the dust collector to separate the solid air is required. Therefore, at the time of unloading, the operator on the ship side manually operates the air delivery device according to the dust collecting function of the ground silo.
However, when there is a large load of powder or granular material, the two tanks of the Cera type air delivery device can be operated while switching alternately, the amount of powder or granular material supplied can be adjusted so that there is no variation in the amount received or the load is cut off, or the cargo is loaded. There is a lot of work for the operator, such as unloading the ship in a well-balanced manner so that the ship does not tilt after it is delivered. In particular, in the case of a ceramic air delivery device mounted on a dedicated ship, the burden is heavy because it is required to unload or load in a short time in the port.
The operation method disclosed in Patent Document 1 reduces the capacity of the bug filter by switching the supply air to one tank to the other tank before the completion of pumping. However, the burden on the dust collector is generated not only when the supply air is switched, but also when the load is exhausted and the input amount varies.

Japanese Unexamined Patent Publication No. 62-105819

The problem to be solved by the present invention is that, in view of the above-mentioned problems of the prior art, the powder or granular material air that can reduce the operator's work when the powder or granular material is sent to the ground silo by simultaneously operating two or more ceramic pumps of the ship. The purpose of the present invention is to provide a delivery system and a method for delivering powder or granular material air.

According to the present invention, as a first means for solving the above problems, the inlet pressure of the dust collector of the ground silo is measured when the powder or granular material is simultaneously delivered to the ground silo from two or more ceramic air delivery units of the ship. Pressure sensor and
A cargo level sensor that detects the remaining amount of powder and granules supplied to each of the ceramic air delivery units, and a cargo level sensor.
An inclination sensor that detects the inclination of the ship and
The air volume of the ceramic air delivery unit is adjusted so that the measured value of the pressure sensor satisfies the set value, and when the measured value of the cargo remaining amount sensor falls below the remaining amount set value, or the measurement of the inclination sensor. When the value is out of the set range, the control unit that alternately operates the scraping portion of the powder and granules to control to eliminate the load shortage or the inclination of the ship, and the control unit.
It is an object of the present invention to provide a powder or granular material air delivery system characterized by the above.
According to the first means, stable delivery of powder or granular material can be realized at a maximum pressure that does not exceed the dust collecting capacity of the dust collector, avoiding discontinuous operation due to variation in the input amount due to out of cargo or inclination of the ship. ..

The present invention, as a second means for solving the above problems, sets the inlet pressure of the dust collector of the ground silo when the powder or granular material is simultaneously delivered to the ground silo from two or more ceramic air delivery units of the ship. A step of controlling the air volume of the ceramic air delivery unit so as to satisfy the value, and
When the remaining amount of the powder or granular material supplied to the ceramic air delivery unit falls below the set value, or when the measured value of the tilt sensor is out of the set range, the powder or granular material is sent to the ceramic air delivery unit. The process of alternately operating the scraping parts that supply the body and controlling to eliminate the load shortage or the inclination of the ship.
It is an object of the present invention to provide a method for delivering powder or granular material air, which comprises the above.
According to the second means, stable delivery of powder or granular material can be realized at a maximum pressure that does not exceed the dust collecting capacity of the dust collector, avoiding discontinuous operation due to variations in the input amount due to out of cargo or inclination of the ship. ..

According to the present invention, it can be operated at a maximum pressure that does not exceed the dust collecting capacity of the dust collector of the ground silo. Further, when simultaneously supplying from a plurality of high-pressure tanks, it is possible to avoid discontinuous operation due to variations in the input amount due to out of cargo or inclination of the ship, and it is possible to reduce the work load of the operator.

It is a structural schematic diagram of the powder / granular material air delivery system of this invention. It is a flow chart of the powder-granular material air delivery method of this invention.

An embodiment of the powder or granular material air delivery system and the powder or granular material air delivery method of the present invention will be described in detail below with reference to the drawings.

[Powder and granular material air delivery system 10]
FIG. 1 is a schematic configuration diagram of the powder or granular material air delivery system of the present invention.
First, the method of transporting the powder / granular material air delivery device mounted on the ship is shown below. A plurality of (two in this embodiment) supply units 1a and 1b (bucket conveyor, etc.) of a ship transported by ship and berthed at the shore are used as a sera-type air delivery unit (powder / granular material air delivery unit, also referred to as a sera pump). ) It is transported to the upper part of 2a and 2b.
A receiving valve 4 is installed above the high-pressure tank 3. When receiving the powder or granular material, the receiving valve 4 is opened by the pneumatic cylinder to receive the powder or granular material in the tank.
After receiving the powder or granular material up to a preset amount in the high-pressure tank 3, the receiving valve 4 is closed to stop the supply into the tank.
Next, the discharge valve 5 provided at the bottom of the high-pressure tank 3 is opened, compressed air is supplied into the tank, and the tank internal pressure is increased by the resistance in the transport pipe 6 connected to the high-pressure tank 3. The internal pressure of the tank during transportation is generally maintained at a high pressure of about 0.39 to 0.69 MPa, and the powder or granular material is sent to the ground silo 7 via the transport pipe 6. The transportation principle of the Cera-type air delivery units 2a and 2b is to send a mixture of high-pressure air and powder or granular material in the tank to a supply destination lower than the tank internal pressure by using a pressure difference. This delivery process is a batch type, and in general, a set of catamaran type with two tanks is often applied. The powder or granular material is received from the supply units 1a and 1b into the high-pressure tank 3 and repeatedly conveyed so that the delivery work can be performed almost automatically and continuously. When there are a large number of powders and granules, a plurality of sets of ceramic air delivery units 2a and 2b are installed and operated at the same time. The powder / granular material air delivery system 10 of the present embodiment is intended for a ship provided with two or more ceramic air delivery units 2a and 2b and capable of simultaneously delivering powder / granular material.

The above-ground silo 7 is equipped with a dust collector 8 that separates powder and granules from air. The powder or granular material air delivery device 10 of the present embodiment is equipped with a pressure sensor 20 capable of measuring the inlet pressure of the dust collector 8. The pressure sensor 20 is electrically connected to the control unit 50, which will be described later, so that the measured value can be transmitted.
The supply units 1a and 1b are each equipped with scraping portions 9a and 9b such as a screw conveyor and a chain conveyor that supply powder and granules in the ship. The scraping portions 9a and 9b and the supply portions 1a and 1b are attached to each of two or more ceramic air delivery portions 2a and 2b. In the vicinity of the scraping portions 9a and 9b, the cargo remaining amount sensors 30a and 30b capable of measuring the remaining amount of powder and granules of the ship are attached. The remaining load sensors 30a and 30b are electrically connected to the control unit 50, which will be described later, so that the measured values can be transmitted.
The ship may be biased due to the partial delivery work of the powder or granular material, and the hull may be tilted. If the hull is tilted, the amount of powder or granular material delivered may vary. Therefore, the ship is equipped with a tilt sensor 40 capable of measuring the tilt of the hull. The tilt sensor 40 is electrically connected to a control unit 50, which will be described later, so that the measured value can be transmitted.

The control unit 50 makes it possible to receive the measured value of the pressure sensor 20, and controls to adjust the air volume of the compressor of the ceramic air delivery units 2a and 2b based on the measured value. The set value of the inlet pressure of the dust collector 8 of the present embodiment is set to the maximum pressure of the dust collecting capacity of the dust collector 8. If the maximum pressure is exceeded, a load will be applied to the dust collector and stable delivery work will be hindered. Since the dust collector pressure is determined by the air volume of the Cera type air delivery units 2a and 2b, the air volume is controlled by the control unit 50 by the compressor of the Cera type air delivery unit 2a and 2b so as to satisfy the set value of the dust collection pressure.
Further, the control unit 50 makes it possible to receive the measured values of the remaining load sensors 30a and 30b and the measured values of the inclination sensor 40, and controls to alternately operate the powder and granular material scraping units 9a and 9b based on the measured values. It is carried out. If the load is exhausted or the amount of powder or granular material to be delivered varies, stable delivery will not be possible and the dust collector 8 will be overloaded. When the amount falls below the limit, the scraping units 9a and 9b to which the load remaining amount sensors 30a and 30b are attached are operated to control the powder and granular material to be supplied to the corresponding supply units 1a and 1b.
Further, when the amount of powder or granular material of the ship is reduced by the sending operation, the hull is tilted and the amount of powder or granular material to be sent out varies. Therefore, a set value for the hull to be horizontal is set in advance, and when the measured value of the tilt sensor 40 is out of the set range, the powder and granular material scraping portions 9a and 9b are alternately operated to level the powder and granular material of the ship. The control is performed so as to eliminate the tilt.

[Powder and granular material air delivery method]
FIG. 2 is a flow chart of the powder / granular material air delivery method of the present invention.
The operation of the No. 1 ceramic air delivery unit 2a is started (step 1). After receiving the powder or granular material up to a preset amount of the high pressure tank 3, the discharge valve 5 provided at the lower part of the high pressure tank 3 is opened, and the powder or granular material is sent to the ground silo 7 via the transport pipe 6.
It is determined whether or not the inlet pressure of the dust collector 8 is outside the set value (step 2).
When the inlet pressure is outside the set value (NO), the air volume is increased or decreased by the compressor of the No. 1 ceramic air delivery unit 2a so that the measured value of the pressure sensor 20 satisfies the set value (step 3).
When the inlet pressure is the set value (YES), the operation of the No. 2 ceramic air delivery unit 2b is started (step 4). After receiving the powder or granular material up to a preset amount of the high pressure tank 3, the discharge valve 5 provided at the lower part of the high pressure tank 3 is opened, and the powder or granular material is sent to the ground silo 7 via the transport pipe 6.
The No. 1 and No. 2 ceramic air delivery units 2a and 2b are in the state of simultaneous operation (step 5).
It is determined whether or not the inlet pressure of the dust collector 8 is outside the set value (step 6). Since the air volume adjustment of the No. 1 Cera type air delivery unit 2a has been completed, the air volume adjustment of the No. 2 Cera type air delivery unit 2b is performed.

When the inlet pressure is outside the set value (NO), the air volume is increased or decreased by the compressor of the No. 2 ceramic air delivery unit 2b so that the measured value of the pressure sensor 20 satisfies the set value (step 7).
When the inlet pressure is the set value (YES), the powder / granular material delivery operation can be performed with the dust collector at the maximum pressure thereafter. During the powder / granular material delivery work, the remaining amount of powder / granular material in the No. 1 and No. 2 ships is measured by the cargo remaining amount sensors 30a and 30b. Further, the inclination of the ship is measured by the inclination sensor 40 (step 8).
When the measured values of the remaining load sensors 30a and 30b are lower than the remaining amount set value of the powder or granular material, the scraping portions 9a and 9b of the powder and granular material in the ship for No. 1 and No. 2 are alternately operated to obtain the powder or granular material. (Step 9).
It is determined whether or not the inclination of the ship is out of the set range (step 10).
When the inclination of the ship is out of the set range (YES), the scraping portions 9a and 9b of the powder and granular materials in the ship for Nos. 1 and 2 are alternately operated to even out the powder and granular materials remaining on the ship. Eliminate the tilt of the ship caused by the body delivery work (step 11).
When the inclination of the ship is within the set range (NO), it is determined whether or not the remaining amount of the powder or granular material in the ship for No. 1 and No. 2 is 0 (the entire load is discharged) (step 12).
If there is a remaining amount of powder or granular material (YES), the steps after step 8 are repeated.
On the other hand, when the remaining amount is 0 (NO), the sending operation is terminated.

According to the present invention as described above, it is possible to realize stable delivery of powder or granular material at a maximum pressure that does not exceed the dust collecting capacity of the dust collector, avoiding discontinuous operation due to variation in the input amount due to out of cargo or inclination of the ship. ..
The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
Further, the present invention is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

1a, 1b Supply part 2a, 2b Cera type air delivery part 3 High pressure tank 4 Receiving valve 5 Discharge valve 6 Transport pipe 7 Ground silo 8 Dust collector 9a, 9b Scraping part 10 Powder / granular material air delivery system 20 Pressure sensor 30a, 30b Remaining amount sensor 40 Tilt sensor 50 Control unit

Claims (2)

A pressure sensor that measures the inlet pressure of the dust collector of the ground silo when the powder or granular material is simultaneously sent from two or more ceramic air delivery parts of the ship to the ground silo.
A cargo level sensor that detects the remaining amount of powder and granules supplied to each of the ceramic air delivery units, and a cargo level sensor.
An inclination sensor that detects the inclination of the ship and
The air volume of the ceramic air delivery unit is adjusted so that the measured value of the pressure sensor satisfies the set value, and when the measured value of the cargo remaining amount sensor falls below the remaining amount set value, or the measurement of the inclination sensor. When the value is out of the set range, the control unit that alternately operates the scraping portion of the powder and granules to control to eliminate the load shortage or the inclination of the ship, and the control unit.
A powder / granular material air delivery system characterized by being equipped with. A step of controlling the air volume of the ceramic air delivery unit so as to satisfy the set value of the inlet pressure of the dust collector of the ground silo when the powder or granular material is simultaneously transmitted from two or more ceramic air delivery units of the ship to the ground silo. When,
When the remaining amount of the powder or granular material supplied to the ceramic air delivery unit falls below the set value, or when the measured value of the tilt sensor is out of the set range, the powder or granular material is sent to the ceramic air delivery unit. The process of alternately operating the scraping parts that supply the body and controlling to eliminate the load shortage or the inclination of the ship.
A method for delivering powder or granular material air, which comprises.

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