JP3069328B2 - Powder supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder supply apparatus for supplying a powder containing a radioactive substance such as a nuclear fuel substance from a powder supply facility to a powder receiving facility without scattering the powder to the outside.

[0002]

2. Description of the Related Art In a nuclear power plant or the like, for example, as shown in FIG. 2, a powder 50 containing a radioactive substance such as a nuclear fuel substance is supplied from a powder supply equipment 51 such as a hopper. In some cases, it is necessary to supply the powder to a powder receiving facility 52 such as a mixer (mixing container) handling the same.

[0003] In this case, the supply of the powder to the powder receiving equipment 52 is usually performed by charging a predetermined amount of powder from the powder supply equipment 51 at a time. A volume of gas (air) flows out of the opening of the powder receiving facility 52 to the outside at one time. Therefore, in the above-mentioned conventional powder supply method, there is a problem that the floating powder in the powder receiving facility 52 flows out to the outside by the airflow from the powder receiving facility 52 and the powder is scattered.

The present invention solves the above-mentioned problems, and a powder supply apparatus capable of supplying powder from a powder supply facility to a powder receiving facility without causing powder scattering. The purpose is to provide.

[0005]

In order to achieve the above object, a powder supply apparatus according to the present invention (claim 1) supplies powder containing a radioactive substance from a powder supply facility to a powder receiving facility. In the powder supply device, (a) the lower part of the powder supply equipment for supplying powder to the powder receiving equipment
And below the powder supply equipment
A connection passage member arranged substantially vertically, which connects the upper part of the powder receiving facility for receiving the powder supplied from the section , and (b) connection so as to branch off from the connection passage member Vacuum suction line, (c) gas-solid separation means provided in the vacuum suction line, and (d) vacuum suction for vacuum-suctioning the gas in the powder receiving equipment via the gas-solid separation means and the vacuum suction line. (E) provided on the powder supply facility side of the connecting passage member,
Communication between the passage member and the powder supply equipment, or
Supply port open / close valve to cut off and powder receiving equipment for connection passage member
Side, and connects the connecting passage member and the powder receiving equipment.
Inlet opening / closing valve to pass or shut off, and connection passage
Communicate or shut off between components and vacuum suction line
A switching mechanism comprising a suction line opening / closing valve,
The communication between the powder supply equipment and the powder receiving equipment is cut off
To allow communication between the powder receiving equipment and the vacuum suction line.
Negative pressure inside the powder receiving equipment by vacuum suction
After that, the communication between the connection passage member and the vacuum suction line is cut off.
And communicate between the powder supply equipment and the powder receiving equipment,
Communication between the connection passage member and the vacuum suction line was cut off.
In this state, the powder is supplied from the powder supply facility to the powder receiving facility.
It is characterized by being constituted so that it may be .

Further, the powder supply apparatus according to claim 2 is characterized in that the powder receiving equipment is a mixer for mixing powder containing a radioactive substance.

The powder supply device according to claim 3 is characterized in that the gas-solid separation means is a cyclone with a bag filter.

[0008]

The powder supply device according to the present invention comprises: (a) powder supply equipment
And a powder receiving device located below the powder supply equipment
A connection passage arranged approximately vertically, connecting the upper part of the equipment
Connected to the member so as to branch off from the connecting passage member (b).
Vacuum suction line and (c) vacuum suction line
(D) gas-solid separation means and vacuum suction line
Vacuum suction to vacuum the gas in the powder receiving equipment
Means (e) provided on the powder supply facility side of the connecting passage member.
Between the connecting passage member and the powder supply equipment.
Supply opening and closing valve and the connecting passage member on the powder receiving equipment side
To provide communication between the connecting passage member and the powder receiving equipment.
Inlet opening / closing valve to shut off, connection passage member and vacuum suction
With a suction line on-off valve that communicates and shuts off between
Switching mechanism, powder supply equipment and powder receiving
While the communication with the equipment is cut off, the vacuum
The powder is drawn by vacuum suction through communication with the drawing line.
After the interior of the body receiving facility is under negative pressure, the connection passage
The communication with the drawing line is cut off, and the powder supply equipment and powder receiving equipment
The connection passage member and the vacuum suction line
In a state where the communication with the
It is configured to supply to the powder receiving equipment from
It is possible to reliably prevent gas from flowing out of the powder receiving facility when the powder is charged. Therefore, it is possible to efficiently prevent the floating powder in the powder receiving facility from scattering on the airflow to the outside.

In order to prevent gas from flowing out of the powder receiving facility during powder supply, the volume of the powder must be increased by a volume (predetermined amount) larger than the volume of the supplied powder under the operating pressure at that time. The gas in the receiving facility may be suctioned under vacuum. In addition, specifically, by pre-evacuating the inside of the powder receiving facility to a predetermined degree of vacuum, the gas, that is, the floating powder, is prevented from flowing out of the powder receiving facility during powder supply. It becomes possible.

Further , since the vacuum suction line is provided with a gas-solid separation means, even if the powder adheres to the inside of the powder receiving equipment at a stage before the powder is introduced. Since the powder flowing out together with the sucked gas can be reliably collected and separated by the gas-solid separation means, it is possible to reliably prevent the powder containing the radioactive substance from scattering to the outside.

[0011] Further, when powder containing a radioactive substance is supplied to the mixer as described in claim 2, the powder supply device of the present invention is used to prevent powder from scattering to the outside. It is possible to reliably supply the body to the mixer, and it is possible to safely perform the mixing process of the powder required in various processes.

Further, by using a cyclone with a bag filter as the gas-solid separation means,
It is possible to reliably collect powder that may flow into the vacuum suction line in some cases without requiring complicated maintenance, thereby improving safety.

The cyclone with a bag filter has a structure in which a bag filter is disposed inside the cyclone. Powder having a large particle size is efficiently collected by the cyclone, and fine powder is collected by the bag filter. Is surely removed. Further, when the bag filter is clogged, the performance can be easily recovered by performing air blowing in a direction opposite to the vacuum suction direction, and maintenance is easy.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be shown and the features thereof will be described in more detail. FIG. 1 is a diagram showing a powder supply device according to an embodiment of the present invention.

This powder supply device is a powder supply device for supplying powder containing a radioactive substance from a powder supply facility to a powder receiving facility. As shown in FIG. Powder receiving port 3 of powder receiving equipment (mixing container) 2 to be supplied
And a powder storage hopper 4 constituting a part of the powder supply equipment 4
a, a cylindrical connecting passage member (connection chute) 6 for connecting the powder supply port (powder discharge port) 5, a vacuum suction line 7 connected to the connection chute 6, and a vacuum suction line 7. Gas-solid separation means (cyclone with bag filter) 8
And a vacuum suction means (exhaust blower) 9 for vacuum-suctioning the gas (air) in the mixing vessel 2 via a cyclone 8 with a bag filter and a vacuum suction line 7. The mixing container 2 is provided with a receiving opening / closing valve 11 for opening and closing the powder receiving opening 3, and the powder storage hopper 4 a is provided with a supply opening / closing valve 12 for opening and closing the powder supply opening 5. Have been. Further, a suction line opening / closing valve 13 for opening and closing the vacuum suction line 7 is provided at a position near the connection chute 6 of the vacuum suction line 7, and furthermore, between the cyclone 8 with a bag filter and the exhaust blower 9. Is provided with a filter 14 for protecting the exhaust blower 9.

That is, in the powder supply apparatus of this embodiment, the above-described receiving / opening / closing valve 11 and supply / opening / closing valve 12,
The suction line opening / closing valve 13 constitutes a switching mechanism A for switching the communication / blocking state between the powder storage hopper 4a, the mixing container 2, and the vacuum suction line 7.

Next, a method for supplying powder using the above powder supply device will be described. In supplying the powder, first, the supply port opening / closing valve 12 of the powder storage hopper 4a is closed, the receiving port opening / closing valve 11 and the suction line opening / closing valve 13 of the mixing container 2 are opened, and the filter 1 is opened by the exhaust blower 9.
4. Cyclone with bag filter 8, Vacuum suction line 7
After that, the gas in the mixing container 2 is evacuated until a predetermined degree of vacuum is reached. Note that the value of the degree of vacuum at this time is a value obtained by calculating in advance the degree of vacuum reached when the gas in the mixing container 2 is sucked by a volume integral larger than the volume of the supplied powder.

Then, the powder supply valve 4b of the powder supply equipment 4 is opened to supply a predetermined amount of powder 1 to the powder storage hopper 4a.
To supply. Next, the on-off valve 13 of the vacuum suction line 7 is closed, the supply port on-off valve 12 of the powder storage hopper 4a is opened, and the powder 1 in the powder storage hopper 4a is dropped into the mixing container 2 via the connection chute 6. .

At this time, the gas in the mixing vessel 2 is suctioned by a volume greater than the volume of the powder 1 supplied under the operating pressure at the time of powder supply , and the mixing vessel 2
When the communication with the empty suction line 7 is cut off,
<br/> because that will be supplied from the powder supply equipment 4 to the mixing vessel 2, gas from the mixing vessel 2 or flows out to the outside, a vacuum suction
Without such that Dari flowing into the pull line 7, the floating powder in the mixing vessel 2 is riding on the gas flows out, Oh
Alternatively, it can be reliably prevented from flowing into the vacuum suction line 7 and scattered outside .

In the powder supply device of the above-described embodiment, since the vacuum suction is performed from the vacuum suction line 7 provided with the cyclone 8 with the bag filter, for example, the mixing container 2 is provided before the powder is charged. Even if the powder adhering to the inside of the device flows out into the vacuum line, the powder is reliably collected by the cyclone 8 with the bag filter.
Since it can be separated, there is no possibility that the powder is scattered outside.

In the above embodiment, the case where the powder receiving equipment is a powder mixing container and the powder supply equipment is a powder storage hopper has been described. The present invention can be applied to the case where the equipment is other than the above, and in such a case, it is possible to obtain the same effect as that of the above embodiment.

In the above embodiment, the case where the cyclone with the bag filter is used as the gas-solid separation means has been described. However, the gas-solid separation means is not limited to the cyclone with the bag filter. Means can be used.

In the above embodiment, the case where an exhaust blower is used as the vacuum suction means has been described. However, the vacuum suction means is not limited to this, and various suction means such as a vacuum pump and an ejector may be used. It is possible.

The present invention is not limited to the above-described embodiment in other respects, and various applications and modifications can be made within the scope of the present invention.

[0025]

As described above, the powder supply apparatus according to the present invention (claim 1) comprises: (a) a lower part of the powder supply equipment;
Connect to the top of the powder receiving equipment located below the equipment
(B) connection passage member arranged substantially vertically,
Vacuum suction line connected to branch off the passage member
And (c) gas-solid separation means provided in the vacuum suction line,
(d) Powder receiving equipment via gas-solid separation means and vacuum suction line
Vacuum suction means for vacuum suction of gas in the facility, and (e) for connection
A connecting passage member provided on the powder supply side of the passage member;
A supply port opening / closing valve for communicating and shutting off between the powder supply equipment and
The connection passage member is provided on the powder receiving side of the connection passage member.
Opening / closing of the receiving inlet for communicating and blocking between the road member and the powder receiving equipment
Connects and blocks the valve, the connecting passage member and the vacuum suction line.
A switching mechanism comprising a suction line opening / closing valve for disconnecting
And cut off the communication between the powder supply equipment and the powder reception equipment
The powder receiving equipment and the vacuum suction line
Vacuum through the powder receiving equipment
After that, the communication between the connection passage member and the vacuum suction line is established.
Shut off and allow communication between powder supply equipment and powder receiving equipment
Communication between the connection passage member and the vacuum suction line is interrupted.
The powder from the powder supply facility to the powder receiving facility.
Since it is configured to supply the gas, it is possible to reliably prevent the gas from flowing out of the powder receiving facility when the powder is charged. Therefore, it is possible to efficiently prevent the floating powder in the powder receiving facility from scattering on the airflow to the outside.

Further, since the vacuum suction line is provided with a gas-solid separation means, even if the powder adheres to the inside of the powder receiving equipment at a stage before the powder is introduced. Since the powder flowing out together with the sucked gas can be reliably collected and separated by the gas-solid separation means, it is possible to prevent the powder containing the radioactive substance from being scattered to the outside.

Also, as in the powder supply device of claim 2,
When the powder containing a radioactive substance is supplied to the mixer, when the powder supply device of the present invention is applied , the powder is reliably supplied to the mixer without scattering the powder to the outside. This makes it possible to safely carry out the powder mixing process required in various steps.

Further, as in the powder supply device of claim 3,
When a cyclone with a bag filter is used as the gas-solid separation means, it is possible to reliably collect powder flowing into the vacuum suction line without the need for complicated maintenance, and to increase safety. Can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a powder supply device according to an embodiment of the present invention.

FIG. 2 is a view showing a conventional powder supply method.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 powder 2 powder receiving equipment (mixing container) 3 powder receiving port 4 powder supply equipment 4a powder storage hopper constituting a part of powder supply equipment 4b powder supply valve 5 powder supply port (powder Discharge port 6 Connection passage member (connection chute) 7 Vacuum suction line 8 Gas-solid separation means (cyclone with bag filter) 9 Vacuum suction means (exhaust blower) 11 Reception inlet open / close valve 12 Supply inlet open / close valve 13 Suction line open / close valve 14 Filter A switching mechanism

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masaki Matsumoto 4-33 Muramatsu, Okai, Tokai-mura, Naka-gun, Ibaraki Prefecture Within the Tokai Works of the Power Reactor and Nuclear Fuel Development Corp. No. 1-2 Inside Kimura Kakoki Co., Ltd. (72) Inventor Jiro Amano 2-1-2 Kiusejijima, Amagasaki City, Hyogo Prefecture Inside Kimura Kakoki Co., Ltd. (56) References JP-A-57-107317 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 53/24 B65G 53/28 B65G 53/60

Claims (3)

(57) [Claims] 1. A powder containing a radioactive substance is supplied from a powder supply facility.
In a powder supply device that supplies powder receiving equipment,(a) The lower part of the powder supply facility that supplies powder to the powder receiving facility
And below the powder supply equipment
Receiving powder supplied from the unit Above the powder receiving facility
Connect, Arranged almost verticallyA connecting passage member;(b) Connection passage memberBranch fromVacuum connected to
A suction line,(c) Gas-solid separation means arranged in a vacuum suction line,(d) Powder receiving equipment via gas-solid separation means and vacuum suction line
Vacuum suction means for vacuum suctioning the gas in the facility,(e) Provided on the powder supply facility side of the connecting passage member,
Communication between the passage member and the powder supply equipment, or
Supply port open / close valve to cut off and powder receiving equipment for connection passage member
Side, and connects the connecting passage member and the powder receiving equipment.
Inlet opening / closing valve to pass or shut off, and connection passage
Communicate or shut off between components and vacuum suction line
A switching mechanism comprising a suction line opening / closing valve,  The communication between the powder supply equipment and the powder receiving equipment is cut off
To allow communication between the powder receiving equipment and the vacuum suction line.
Negative pressure inside the powder receiving equipment by vacuum suction
After that, the communication between the connection passage member and the vacuum suction line is cut off.
And communicates between the powder supply equipment and the powder reception equipment,
Communication between the connection passage member and the vacuum suction line was cut off.
In this state, the powder is supplied from the powder supply facility to the powder receiving facility.
Powder supply apparatus characterized in that
Place. 2. A powder supply apparatus according to claim 1, wherein said powder receiving equipment is a mixer for mixing powder containing a radioactive substance. 3. A powder supply apparatus according to claim 1, wherein said gas-solid separation means is a cyclone with a bag filter.