JP6432868B2 - Cylindrical fine particle classification device - Google Patents

Description

The present invention relates to a cylindrical fine particle classification device.

In advanced technology industries such as electronic / electrical equipment, magnetic materials, information equipment, bio / medical equipment, etc., the movement to develop new products, improve the quality and accuracy of existing products has been accelerated, and as part of this, new materials Development, refinement of existing powder materials such as metals, ceramics, various inorganic and organic materials, high purity, uniform size, etc. are increasing. In order to meet this demand, pulverization, dispersion, classification, Various powder processing apparatuses such as drying have been proposed.

Among the powder processing equipment, the need for a fine particle classification device that uses a classification screen is increasing, and the "vibration sieve" performs screening and classification by vibrating and shaking the classification screen. (Refer to Patent Document 1), or “air-flow type sieving machine” (refer to Patent Document 2) in which powder particles are placed in an air stream and passed through a classification screen, and powder dispersed in a solvent (liquid) is electroformed. A classifier according to the characteristics of the granular material and the applied product, such as an “electrical sieve classification device” (see Patent Document 3), which performs classification using a manufactured screen, so-called electric sieve, has been introduced.

From this point of view, this patent applicant also performs bi-directional sieving classification, in which a suspension or gas containing fine powder is passed through a cylinder or chamber incorporating a sieving screen in the sieving classification field. We propose a wet classifier using a filter unit. (See Patent Documents 5 and 6)

JP-A-2005-313038 (paragraphs 0005 to 0008) JP 2007-301490 A (paragraphs 0013 to 0017) JP 2012-176383 A (paragraphs 0008 to 0016) Japanese Patent Laying-Open No. 2015-013269 (paragraphs 0022 to 0024) JP2013-000650A (paragraphs 0013 to 0016) Japanese Patent Application No. 2014-095671 (paragraphs 0009-0013)

In the case of sieving classification of granular materials, classification screens that are developed by more robust, accurate and finer mesh classification screens to improve the effect, and caused by the adhesion that appears as a general characteristic of fine granular materials Development of a more effective mechanism for reducing clogging of the mesh is underway, and the applicant of this patent also applied to the above-mentioned patent application suspension containing granular materials, flow control of gas in both directions, Proposals for classification screens and suspensions containing particles, irradiation of vibrations to gas, propagation, backwash air injection, and spray nozzle utilization, but when considering the classification of fine particles Although this proposal has achieved a certain result, it cannot be said that the request from the user side is sufficiently satisfied, and the present invention aims to further improve the fine particle classification apparatus and reduce the cost. 1) Classification screen A structure that enables the placement of vibration oscillators that match the directivity of vibration waves such as ultrasonic waves, (2) provision of a structure that enables maximum use of the effective classification area of the classification screen, (3) various manufacturing methods, It is possible to adopt a material classification screen.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a cylindrical or polygonal cylindrical cage closed at the top is fixed to a common plate , and the cylindrical cage is a cylindrical flexible metal. Wrapping from the outside with a classification screen made of plastic or resin, and fixing the classification cylinder to the common plate in such a way that the cylindrical cage wrapped with the classification screen is stored in the center of the inside, the inner lower part of the classification cylinder and the cylinder outside the Jo cage, connecting the supply and discharge switching valve in a manner to penetrate a common plate of said, have a coarse powder side return opening to the upper side surface outside the classification cylinder, said the upper part outside the classification cylinder classifying cylinder and has the classification screen and washed recovery switching valve the cylindrical cage is through installed, the washing liquid discharge valve inside the lower portion of the cylindrical cage And, connecting the raw material supply pipe on a side of the supply and discharge switching valve,
A coarse powder discharge pipe is connected to the lower part of the supply / discharge switching valve, a raw material return pipe is connected to the coarse powder side return port, a fine powder suction pipe is connected to the lower part of the washing / recovery switching valve, and A cylindrical fine granular material in which a fine powder recovery pipe is connected to the side of the cleaning / recovery switching valve, a cleaning liquid supply pipe is connected to the upper part of the cleaning / recovery switching valve, and a cleaning liquid discharge pipe is connected to the lower part of the cleaning liquid discharge valve. It is a classification device.

A cylindrical fine particle classifying apparatus in which a plate-like classification screen is mounted and fixed from the outside on the open surface of the cylindrical cage or the polygonal cylinder type cylindrical cage according to claim 1 .

A cylindrical fine particle classification device in which a vibration oscillator is mounted inside the cylindrical cage according to claim 1 .

A cylindrical fine particle classifier equipped with a backwashing injection mechanism for injecting a liquid or gas into the cylindrical cage according to claim 1 .

The following effects can be obtained by the present invention. Rather than sieving the fine particles or fine particles that are subject to classification with a single plate classification screen, they are wrapped around the entire circumference with a cylindrical classification screen, or a large number of plates The sieving is performed by enclosing with a classification screen, the effective classification area of the classification screen is greatly increased, and the classification throughput is greatly improved.

In addition, it is possible to oscillate vibration waves such as ultrasonic waves with directivity not only in the axial direction of the vibration oscillator but also in the outer circumferential direction, making use of more efficient vibration effects considering the directivity of vibration waves In addition, it is possible to effectively stir and disperse the suspension containing the particles to be classified, and to reduce clogging powder more effectively than to reduce the adhesion of fine powder to the classification screen. The division effect can be improved.

In addition, when using a classification screen, it is possible to adopt not only a plate-shaped electroformed sieve mesh but also a wide range of options such as resin woven mesh, flexible metal mesh, electroformed sieve mesh, etc. It is possible to design a classification screen type fine particle classification device.

It is sectional drawing which shows an example of the cylindrical cylindrical fine particle classification device which concerns on this invention. It is a schematic diagram which shows an example of the whole system by the cylindrical fine particle classification apparatus (cylindrical type) and related apparatus which concern on this invention. It is a schematic diagram which shows an example of the whole system by the cylindrical fine particle classification apparatus (cylindrical type) of a vibration oscillator built-in type which concerns on this invention, and related equipment. It is a vertical sectional view showing an example of a cylindrical cage of a cylindrical fine particle classification device (cylindrical type) according to the present invention. It is a horizontal sectional view showing an example of a cylindrical cage of a cylindrical fine particle classification device (cylindrical type) according to the present invention. It is a vertical sectional view showing an example of a polygonal cylinder cage of a cylindrical fine particle classification device (polygonal cylinder type) according to the present invention. It is a horizontal sectional view showing an example of a polygonal cylinder tubular cage of a cylindrical fine granular material classification device (polygonal cylinder type) according to the present invention.

Next, an embodiment of the present invention will be described with reference to FIGS. However, the present invention is not limited to this.

A cylindrical fine particle classification device 1 shown in FIG. 1 is a so-called wet type basic device for wet classification for fine particle or suspension containing fine particles. It is the schematic diagram which illustrated the cylindrical fine particle classification device 1 and related incidental equipment. FIG. 3 is a schematic diagram of a cylindrical fine particle classification device 23 and associated auxiliary equipment in which an ultrasonic oscillator 24 is incorporated inside the cylindrical cage 3. 4 and 5 show an example of a cylindrical cage, and FIGS. 6 and 7 show an example of a prismatic cylindrical cage.

The cylindrical fine particle classification device 1 is a basic cylindrical fine particle classification device in which a cylindrical cage 3 and a classification cylinder 2 are mounted on a common plate 21. Depending on the state, characteristics, particle size, or characteristics of the suspension containing fine particles, the vibration oscillator 24 or the inside of the cylindrical cage 3 as shown in FIG. It is possible to carry out classification work with an additional backwashing gas injection mechanism that injects liquid or gas. 4 and 5, the tubular cage 3 using a woven mesh as the classification screen 4, or the inflexible plate-shaped electroformed mesh classification screen 4.1 shown in FIGS. 6 and 7. The specification of the classification device can be flexibly changed according to the content of the classification work required, such as the cylindrical cage 3.1 using the.

The classification operation by the basic apparatus will be described with reference to FIG. 1 and FIG. The suspension containing the granular material is operated by closing the cleaning liquid discharge valve 8 of the cylindrical fine particle classification device 1, opening the classification cylinder 2 side of the supply / discharge switching valve 5, and operating the coarse powder side pump 15. Passes through the coarse powder supply pipe 10 from the raw material supply container 14 and is supplied to the classification cylinder 2 via the supply / discharge switching valve 5, and the water level of the suspension inside the classification cylinder 2 gradually rises. At the same time, a part of the suspension is passed through the classification screen 4 and the suspension containing fine particles flows into the cylindrical cage 3 through the mesh of the classification screen 4. The suspension liquid containing fine powder classified by operating the fine powder side pump 16 is sent to the fine powder collection container 13 via the fine powder side collection pipe 12. When the predetermined classification process is completed, the cleaning / recovery switching valve 7 is operated to open the cleaning liquid supply pipe 17 side, and the cleaning liquid is introduced into the cylindrical cage 3 and the classification cylinder 2 and the supply / discharge switching valve 5 is switched. By opening the discharge pipe 20 side and opening the cleaning liquid discharge valve 8 to allow the suspension to flow into the cleaning liquid discharge pipe 19 side, the remaining suspension liquid in the cylindrical cage 3 and the classification cylinder 2 is removed. Complete the work by discharging to the outside.

In the case of a granular material having high adhesion, as shown in FIG. 3, the classification operation is made efficient by utilizing the vibration oscillator 24. In this case, the classification operation is as follows. The cleaning liquid discharge valve 8 is closed, the classification cylinder 2 side of the supply / discharge switching valve 5 is opened, the fine powder collecting pipe 12 side of the cleaning / collecting switching valve 7 is opened, and the coarse powder side pump 15 is operated, thereby including the powder particles. The suspension is supplied from the raw material supply container 14 to the classification cylinder 2 via the coarse powder supply pipe 10 and the supply / discharge switching valve 5, and the water level of the suspension inside the classification cylinder 2 gradually rises. At the same time, a part of the suspension is passed through the classification screen 4, and the suspension containing fine particles flows into the cylindrical cage 3 through the mesh of the classification screen 4. The suspension liquid containing fine powder classified by operating the fine powder side pump 16 is sent to the fine powder collection container 13 via the fine powder suction pipe 18 and the fine powder collection pipe 12. At the stage where the inflow of the turbid liquid containing fine particles to the fine powder collection container 13 is confirmed, the process moves to the process of operating the vibration oscillator 24 and fully operating the classification work.

(If the mesh of the classification screen is extremely fine, the suspension may not naturally pass through the screen due to physical properties such as the surface tension of the liquid. In that case, the back side of the classification screen, that is, the opposite side is called priming water, etc. Suspension) from the raw material return pipe 11 connected to the coarse powder return port 6 to the raw material supply container 14 in a state in which no turbid liquid flows into the fine powder collection container 13. If the inflow of water is recognized, the cleaning / recovery switching valve 7 is switched, the cleaning liquid supply pipe 17 side is opened, and the cleaning liquid (basically, the solvent not containing the granular material) is used as the priming water from the cleaning liquid supply container 22 Supply to cage 3. At the stage where the inflow of the turbid liquid containing fine particles into the fine powder collection container 13 is confirmed, the cleaning / collection switching valve 7 is switched, the cleaning liquid supply pipe 17 side is closed, the fine powder collection pipe 12 is opened, and the vibration oscillator 24 is operated. Move to a process where classification work is fully operational.

When it is determined that clogging or adhesion of the granular material to the classification screen 4 has become significant due to a change in the discharge amount of the suspension containing fine powder to the fine powder collection container 13, the supply / discharge switching valve 5 is set to coarse powder. The suspension containing the granular material to be classified is switched to the discharge pipe 20 side, the cleaning / recovery switching valve 7 is switched, the cleaning solvent is supplied into the cylindrical cage 3, and classification is performed from the cylindrical cage 3. While irradiating the screen 4 with the vibration wave generated from the vibration oscillator 23, the clogged fine powder is washed away with the above-described cleaning liquid and discharged from the coarse powder discharge pipe 20 to the outside. When the cleaning is finished, the cleaning / recovery switching valve 7 and the supply / discharge switching valve 5 are switched, and the classification operation is resumed.

When the predetermined classification processing is completed, the supply / discharge switching valve 5 is switched, the coarse powder discharge pipe 20 side is opened, the cleaning liquid discharge valve 8 is operated to open the cleaning liquid discharge pipe 19 side, and the cleaning / collection switching valve 7 is opened. Then, the cleaning liquid supply pipe 17 side is opened, the cleaning liquid is introduced into the cylindrical cage 3 and the classification cylinder 2, the inside of the cylindrical cage 3 and the classification cylinder 2 is cleaned, and the remaining suspension is discharged to the outside. Complete.

According to the above invention, as a classifying means, not only a flat plate-like classifying screen made of metal and resin but also flexible, a flexible screen and a woven net are attached in a cylindrical shape, and are classified as fine objects. It can also be used in the form of enveloping powder particles, and the effective classification area has been greatly increased compared to conventional fine powder classifiers. Can be used. In addition, more effective vibration wave agitation / dispersion to suspension or gas containing powder, reduction of adhesion of fine powder to classification screen, improvement of sieving effect, and removal of clogged powder Become.

1 Cylindrical fine particle classification device (cylindrical type)
2 classification cylinder 3 cylindrical cage (cylindrical type)
3.1 Cylindrical cage (polygonal prism type)
4 Classification screen 4.1 Classification screen (plate)
5 Supply / discharge switching valve
6 Coarse powder side return port 7 Cleaning / recovery switching valve 8 Cleaning liquid discharge valve 9 Cylindrical fine particle classification device (cylindrical type) and related equipment 10 Raw material supply pipe 11 Raw material return pipe 12 Fine powder recovery pipe 13 Fine powder collection container 14 Raw material supply Container 15 Coarse powder side pump 16 Fine powder side pump 17 Cleaning liquid supply pipe 18 Fine powder suction pipe 18.1 Fine powder suction pipe 19 Cleaning liquid discharge pipe 20 Coarse powder discharge pipe 21 Common plate 22 Cleaning liquid supply container 23 Cylindrical fine particle classification device ( Cylindrical type with built-in vibration oscillator)
24 Vibrating oscillator

Claims (4)

A cylindrical or polygonal cylindrical cage with the top closed is fixed to a common plate ,
Wrapping the cylindrical cage from the outside with a cylindrical flexible metal or resin classification screen,
The classification cylinder is fixed to the common plate in such a manner that the cylindrical cage wrapped with the classification screen is stored in the center of the inside,
A supply / discharge switching valve is connected to the inside lower part of the classification cylinder and the outside of the cylindrical cage in a form penetrating the common plate ,
The coarse powder side return port is provided outside the upper side surface of the classification cylinder,
A cleaning / recovery switching valve installed through the classification cylinder, the classification screen, and the cylindrical cage on the upper outer side of the classification cylinder;
A cleaning liquid discharge valve is provided at the inner lower portion of the cylindrical cage,
A raw material supply pipe is connected to the side of the supply / discharge switching valve,
A coarse powder discharge pipe is connected to the lower part of the supply / discharge switching valve,
The raw material return pipe is connected to the coarse powder side return port,
A fine powder suction pipe is connected to the lower part of the washing / recovery switching valve,
A fine powder recovery pipe is connected to the side of the cleaning recovery switching valve,
A cleaning liquid supply pipe is connected to the upper part of the cleaning recovery switching valve,
A cylindrical fine particle classification device in which a cleaning liquid discharge pipe is connected to the lower part of the cleaning liquid discharge valve. A cylindrical fine particle classification apparatus in which a plate-shaped classification screen is mounted and fixed from the outside on the open surface of the cylindrical cage of the cylindrical or polygonal column type according to claim 1 . A cylindrical fine particle classification device in which a vibration oscillator is mounted inside the cylindrical cage according to claim 1 . A cylindrical fine particle classification apparatus equipped with a backwashing injection mechanism for injecting liquid or gas into the cylindrical cage according to claim 1 or 2 .

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