JPS58219912A - Method and apparatus for removing magnetic powdery particles in matrix part - Google Patents

Abstract

PURPOSE:To remove magnetic powdery particles adhered to a matrix simply and certainly, by a method wherein a matrix made of an amorphous metal magnetic material is excited by an electromagnetic coil and a high gradient magnetic field is formed to impart vibration to the matrix. CONSTITUTION:At the time of usual operation, a current is supplied to an electromagnetic coil 10 while a fluid having magnetic powdery particles suspended therein is supplied to a container 3 from a supply pipe 8 and discharged to a discharge pipe 2 through matrices 8. The magnetic powdery particles are adhered to matrices 8 by magnetical coercive force. In removing adhered particles, the supply of the fluid and the supply of a current to the coil 10 are stopped. Subsequently, a high frequency current or a current required in electrostriction is supplied to a vibrator 9 and the matrices 8 are vibrated through a vibration plate 7 to desorb the adhered particles. In addition, washing water is supplied into the container 3 from the side of the supply pipe 1 to be discharged to the side of the discharge pipe 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a magnetic powder in a matrix portion that allows magnetic particles attached to a matrix made of an amorphous metal magnetic material of a granulator or an electromagnetic filter to be easily and reliably removed. The present invention relates to a method for removing powder and granular material and an apparatus therefor.

In a granulator or electromagnetic filter, when a matrix made of amorphous metal magnetic material is excited and fine particles of magnetic powder such as iron oxide powder are attached to the matrix, the magnetic powder must be removed each time. There must be.

Conventionally, the removal of magnetic particles adhering to the matrix has been carried out by turning off the coil power, demagnetizing the matrix, and passing cleaning water through it, but with this method, the adhering substances are not removed sufficiently; Moreover, a large amount of water must be treated as a secondary process, and the number of steps increases, which increases the amount of work and costs. Furthermore, if the deposits are further applied with electricity without being sufficiently removed by IJ hooks, the adhesion effect will be reduced, and if the matrix is a granular matrix, it may cause clogging and cause a pressure drop in the system. Naru 9
Furthermore, if magnetic particles generated in the coolant used in nuclear power remain in the matrix, the radiation dose will be high in that area, causing problems in maintenance, inspection, repair, etc.

The object of the present invention is to provide a method for removing magnetic powder and granules in a matrix portion, which allows magnetic powder and granules attached to the matrix to be easily and reliably removed to maintain the functions of a granulator and an electromagnetic filter. By providing an apparatus, a matrix of amorphous metallic magnetic material is excited by an electromagnetic coil to form a high gradient magnetic field, thereby adhering magnetic powder suspended in a fluid to the matrix; This method is characterized by applying vibration to the matrix to remove deposits from the matrix.

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

The required container (3) connected with the supply pipe (1) and the discharge pipe (2)
) inside, on the bottom? A diaphragm containing a canister (5) having XI number of water holes (4), and having a plurality of water holes (6) drilled on the upper surface of the canister (5). (
7) and the diaphragm (7) and the canister (
A matrix (8) is housed between the container (3), a vibrator (9) such as a magnetostrictive vibrator or an electrostrictive vibrator is attached to the upper surface of the diaphragm, and an electromagnetic coil is placed around the outer periphery of the container (3). OI
A high-temperature, high-voltage wire through-hole (
17) Install.

The matrix (8) is made of porous amorphous metal magnetic material in the form of thin wires, and is in the form of a thin tape, and the matrix (8) is arranged so that its longitudinal direction is parallel to the flow.

Next, the operation of the present invention will be explained.

During normal operation, the electromagnetic coil Ql is energized, and the fluid in which the magnetic powder is suspended is supplied from the supply pipe (1) to the container (31), passed through the matrix (8) section, and then passed through the discharge pipe (2).
). The magnetic powder is attached to the matrix (8) as a deposit by magnetic coercive force.

When removing the deposits that have adhered to the matrix (8), stop the supply of fluid from the supply pipe (1) to the container (3), stop energizing the electromagnetic coil Ql, and turn off the vibrator (
9) by applying a high frequency current of about 10 to 15 KC or a current necessary for electrostriction to vibrate the matrix (8) via the diaphragm (7) and detach the deposits from the matrix (8), Also, pour the washing water into the container (3) from the supply pipe (1) side.
) and discharged to the discharge pipe (2) side or a separately installed removal line. The deposits separated from the matrix (8) are discharged to the outside of the container (3) together with the washing water.

In addition, although the embodiments of the present invention have described the case where the matrix is arranged parallel to the flow, it is also possible to arrange the matrix at random, and it is also possible to apply it to either a single granulator or an electromagnetic filter. It goes without saying that various other changes may be made without departing from the gist of the present invention.

According to the method and device for removing magnetic powder from the matrix section of HOMEKI, it is possible to (1) simply and reliably maintain the IJx section in a normal state, thereby increasing the adhesion efficiency of magnetic powder; can be kept in good condition.

(Since W deposits can be easily removed, planning can be done without considering problems due to pressure loss or high radiation dose.

(Foundation) Since high radiation doses can be kept within a predetermined range, maintenance inspections, repairs, etc. will be easier.

GV) Work safety is improved because deposits can be removed by remote control.

Even when M-washing water is used, only a small amount of washing water is required, which makes post-processing easier.

Various excellent effects can be achieved.

[Brief explanation of the drawing]

The figure is an explanatory diagram of the method and apparatus for removing magnetic powder in the matrix portion of the present invention. In the figure, (3) is a container, (5) is a canister, (7) is a diaphragm, (8) is a matrix, (9) is a vibrator, (II
indicates an electromagnetic coil. Continued from page 1 0 Inventor: Kore Majima ■ Applicant: Ishikawajima Harima Heavy Industries Co., Ltd. 2-2-1 Otemachi, Chiyoda-ku, Tokyo

Claims (1)

[Claims] 1) A matrix of amorphous metallic magnetic material is excited by an electromagnetic coil to form a high gradient magnetic field, so that magnetic particles suspended in a fluid are attached to the matrix. A method for removing magnetic powder in a matrix portion, which comprises applying vibration to remove deposits from the matrix. 2) IJ Lux, a matrix of amorphous metal material housed in a container into which magnetic powder and granules flow, a vibrator and diaphragm arranged in the container to vibrate the matrix, and A device for removing magnetic powder in a matrix portion, characterized in that it is equipped with an electromagnetic coil, an electrostrictive power source, or a magnetostrictive power source.