JPH035862B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The disclosed technology belongs to the technical field of the structure of a centrifuge for concentrating an aqueous solution containing ice.

<Summary of the gist> The invention of this application is such that a separation main body having a supply port for an aqueous solution containing ice, etc. is provided with a cylindrical body of a predetermined mesh connected to a drive device, and the supply port is connected to the cylindrical body. The present invention relates to a centrifugal separator that faces inside and has a scraper disposed opposite to the cylinder to scrape off adhered materials to be processed, and in particular, the scraper has a relative speed difference in the same direction as the cylinder. The scraper is slidably mounted on the cylindrical body, and is rotatable.
Alternatively, it relates to a centrifugal separator that has a set clearance and is biased by an elastic spring through a roller that rolls into contact with the cylinder, so that it is disposed opposite to the cylinder in a non-contact manner. It is an invention.

<Prior art> In general, centrifuges are widely used in various industries as central technical chemical and mechanical devices that perform separation operations such as sedimentation, precipitate concentration, filtration, and dehydration under the centrifugal force generated by rotation. For example, in the food industry, it is used as a device for removing moisture from food and concentrating it.

By the way, when removing the moisture from the food mentioned above,
In order to avoid food denaturation due to heating and to increase separation efficiency, semi-freeze concentration is used to separate water at low temperatures.

For example, when concentrating a youth solution, etc.,
The water in the aqueous solution is frozen and turned into a shearbet, which is then centrifuged to separate the juice solution from the ice and concentrate.

At this time, the shear bed supplied from the input port of the centrifuge is rotated by a cylinder with a predetermined mesh built into the centrifuge body, so that liquid component water is separated outward and frozen components are separated inward. However, there was a problem in that the frozen content in the shear bed gradually adhered to the inner wall of the cylinder including the mesh part and accumulated, forming an ice film and blocking the mesh part, resulting in a decrease in separation efficiency over time. .

As a result, the operation must often be stopped to scrape off the ice, resulting in extremely low operating efficiency.

To deal with this, for example,
As devised in the publication, a centrifugal separator was devised in which a fixed type scraper was installed opposite to the inner surface of the cylinder body, and the attached ice film was continuously removed by the difference in relative high speed rotation between the scraper and the rotating mesh part. However, as mentioned above, since the cylinder rotates at high speed, the load acting on the stationary scraper is large, and furthermore, since the scraper is in sliding contact with the cylinder, the scraper and cylinder may interfere with each other. There was a problem with the possibility of damaging the mating mesh part.

Therefore, the ice cannot be scraped off reliably, and the inner wall of the cylinder must be cleaned regularly.
The problem was that continuous operation was difficult.

Furthermore, it is difficult to make the minute gap between the inner surface of the mesh part of the cylinder and the scraper constant because it is difficult to make the cylinder a perfect circle, and it is difficult to maintain a constant scraping amount on the scraper. There was also the inconvenience of not being able to do so.

<Purpose of the invention> The purpose of the invention of this application is to solve the problem of the centrifuge based on the above-mentioned prior art as a technical problem to be solved,
The ice component that inevitably adheres to the inner surface of the cylinder does not block the mesh part, maintains a continuous separation function, and keeps the separation efficiency constant, which is an excellent feature that benefits separation technology applications in various production industries. The purpose of this project is to provide a centrifugal separator.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the invention of this application, which is based on the scope of the above-mentioned claims, is to solve the above-mentioned problem. When the ice-containing liquid component introduced into the supply port is pressed by centrifugal force against the inner surface of the rotating cylindrical body via the drive device provided in the separator main body, the liquid component
The ice is separated outside a predetermined mesh part of the cylinder and discharged to the outside of the machine, while the liquid component of the ice pressed against the inner surface of the cylinder is sufficiently separated,
Even if the ice adheres to the inner surface of the cylindrical body, the scraper rotating at a relative speed in the same direction as the cylindrical body through the drive device mechanically peels off the adhered ice. During this process, the scraper is applied directly to the inner surface of the cylindrical body, or
The separated liquid components are held at all times indirectly through the attached rollers with a set clearance, and furthermore, are constantly urged against each other through the elastic springs, so that the separated liquid component is substantially This is a technical measure that allows the concentrated liquid to be discharged outside the machine and connected to the next stage of the process.

<Example> Next, an example of the invention of this application will be described below based on the drawings.

In the embodiment shown in FIG. 1, the centrifugal separator is the gist of the invention of this application, and the illustrated embodiment is one used in a food use plant, with a bottomed separator connected to the tip of a conveyor 2. A cylindrical separator main body 3 is mounted and fixed on a base 5 via legs 4 serving as lower brackets.

The separator main body 3 is provided with a nichrome wire heater 7 on its lower bottom 6, a valve 9 is attached to a discharge port 8 that opens to the side, and a ring-shaped middle bottom 10 and a flange on the top bottom 11 at the top. 12,1
3 includes a rubber roller 1 whose peripheral surface is protruded inward.
4, 14... are attached on all sides, and a valve 16 is provided at the outlet 15 of the inner sole 10.

Inside the separator body 3, a seal ring 18 is provided on a bearing 17 attached to the center of the bottom 6 of the separator body 3, and a hollow shaft 19 is supported by passing through the bearing 17. A cylindrical body 21 is fixedly extended upwardly through a honeycomb bracket 20 .

Thus, the cylindrical body 21 has a plurality of vertical ribs 22, 2
It has a cylindrical metal steel 23 of a predetermined mesh in which 2... are installed, and an upper lid 25 having a supply port 24 is integrally formed in the circular upper part thereof.

The supply port 24 at the center of the upper lid 25 faces the tip of the conveyor 2 connected to a predetermined youth shear bed manufacturing apparatus 26.

The rubber rollers 14, 14, . . . are rotatably abutted on the peripheral surfaces of the upper lid 25 and the honeycomb bracket 20.

Further, a cover 27 is provided above the bearing 17 and the seal ring 18.

A shaft 28 is loosely mounted concentrically inside the hollow shaft 19, and the shaft 28 is connected to four scrapers 29 equiangularly arranged in the circumferential direction opposite to the inner surface of the metal steel 23.
29 are supported at the upper and middle portions of the shaft 28 via pipe-shaped brackets 30, respectively.

Each scraper 29 is opposed to the metal steel 23 with a predetermined minute clearance between rubber rollers 31, 31, . . . attached to the upper and lower portions of the scraper 29.

Furthermore, in the center of the upper bracket 30, a conical dispersion cone 32 is provided corresponding to the supply port 24.
However, on the other hand, a truncated cone-shaped dispersion cone 33 is integrally attached to the center of the lower bracket 30.

The hollow shaft 19 and the shaft 28 have bevel gears 34 and 3 integrally attached to their respective lower ends.
5, it is linked to a motor 37 on the base 5, which is linked to a gear group 36 as a transmission.

Note that the hollow shaft 19 and the shaft 28 are configured to rotate in the same direction via a gear group 36 at a set speed difference.

Further, a universal joint 38 is interposed at the lower part of the shaft 28.

In the above configuration, by driving the motor 37, the hollow shaft 19 and the shaft 28 are rotated in the direction of the arrow in the figure through a set relative speed difference via the gear group 36 and the bevel gears 34 and 35.

Therefore, while the cylinder 21 rotates inside the separator main body 3 via the rubber rollers 14, 14,
Each scraper 29 inside the cylinder 21
The scraper 29 rotates in the same direction via the rubber rollers 31, 31, .

As described above, when the shear bed-shaped workpiece 40 carried out from the youth shear bed device 26 by the belt conveyor 2 is put into the supply port 24 with the centrifugal separator 1 in operation, the workpiece is The processed material 40 is uniformly distributed in the circumferential direction by the rotating dispersion cones 32 and 33, and
It is pressed against the gold steel 23 of No. 1 through centrifugal force.

Therefore, the workpiece 40 is placed on the gold steel 23,
The liquid component is passed through and separated and concentrated, and is appropriately discharged from the discharge port 15 of the separator main body 3 through the discharge valve 16 and supplied to the next step.
The ice components remaining on the cylinder 21 and stacked on the cylinder 21
Each scraper 2 rotates at a set relative speed to
9, falls from the honeycomb plate 20 onto the bottom 6 of the separator body 3, and is melted by the heating action of the nichrome wire heater 7.
It is discharged as moisture from the discharge port 8 through the discharge valve 9.

At this time, even if frozen particles accumulate on the gold steel 23 and try to cause clogging, the scraper 29 forcibly peels off and removes it one by one, so the separation function is always maintained. The efficiency does not decrease, and each scraper 29 has a minute clearance between it and the metal steel 23 by using a rubber roller 31.
Since it is always kept constant through
Furthermore, interference between the two due to rotation is prevented.

Furthermore, by the universal joint 38,
Even if the shaft 28 rotates eccentrically, the rotational force is transmitted to the shaft 28 without any force being applied to it.

The objects 4 to be processed are sequentially supplied as described above.
0 contributes to the separation of ice components,
A concentrated liquid component of a set concentration is obtained from the discharge valve 16.

Next, in the embodiment shown in FIGS. 2 and 3, each scraper 29 has a sliding body 3 radially biased inside the bracket 30' via an elastic spring 38.
Since the rubber rollers 31 above and below each scraper 29 are always pressed against the metal steel 23, the minute clearance between the scraper 29 and the metal steel 23 is maintained even by rotational vibration. Reliably maintained without fluctuation.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned embodiments, for example,
Instead of gold steel, a punching plate or a metal lath plate may be used, or a heater may be attached to the scraper to provide a heating and melting effect at the same time as the peeling and separating action of frozen components. An air damper may be used in place of the spring, or a continuously variable transmission device may be interposed in the gear group to adjust the relative speed between the scraper and the cylindrical body in accordance with the properties of the material to be processed. The clearance with the cylindrical body may be changed through an adjustment device, or the rubber roller may be made detachable so that it can be converted to one with a different outer diameter.
Utilizes LPG cold energy to freeze and concentrate seawater,
Various embodiments can be adopted, such as obtaining water separated at that time and making it usable in the seawater desalination industry.

<Effects of the Invention> According to the invention of this application, the deposits on the inner surface of the cylindrical body of a predetermined mesh are basically scraped off using a scraper, so that even if the cylindrical body becomes clogged during operation, it can be avoided. , Continuous operation is possible without stopping the operation, and as long as the operation is continued, the separation function can be maintained, the separation efficiency is improved, and the excellent effect of separating the objects to be processed is achieved.

In addition, since the scraper can rotate at a relative speed in the same direction as the cylinder, the load caused by mutual interference between the cylinder and the scraper is smaller compared to a type where the position and orientation of the scraper is fixed. As long as this is the case, the excellent effect of preventing damage to the scraper and the metal steel can be achieved.

Furthermore, since the scraper has a set clearance via a roller that rolls freely in contact with the cylinder, it is possible to maintain a constant scraping condition between the scraper and the cylinder at all times. The excellent effect of being able to reliably scrape off deposits is achieved.

Furthermore, since the scraper is biased against the cylindrical body, it is possible to follow the rotation of the cylindrical body and provide an excellent effect that the scraper can be more reliably disposed in opposition to the cylindrical body.

In addition, the cylindrical body does not become clogged during operation and continuous operation is possible, which has the advantage of increasing throughput and reducing operating costs.

[Brief explanation of drawings]

The drawings show embodiments of the invention of this application, and
The figure is an overall schematic sectional view of one embodiment, FIG. 2 is a partial plan view of another embodiment, and FIG. 3 is a front view thereof. 4...Bracket (leg), 5...Base, 3...
... Separator main body, 21 ... Cylinder, 37 ... Drive device (motor), 29 ... Scraper, 36 ... Transmission device (gear group), 1 ... Centrifugal separator, 31 ... Roller (rubber roller).

Claims (1)

[Scope of Claims] 1. A centrifugal separator body, which is attached to a base via a bracket, has a cylindrical body of a predetermined mesh rotatably contained therein, and the cylindrical body is connected to a drive device, and is equipped with a scraper. In the separator,
The scraper is rotatably attached to the cylindrical body, linked to the drive device via a transmission, and attached with a set minute clearance via a roller that rolls into contact with the cylindrical body. Characteristic centrifugal separator. 2. A centrifugal separator in which the separator main body, which is attached to the base via a bracket, rotatably houses a cylindrical body of a predetermined mesh, the cylindrical body is connected to a drive device, and is equipped with a scraper,
The scraper is biased by an elastic spring and rotatably attached to the cylindrical body, and is connected to the drive device through a transmission and has a preset minute clearance through a roller that rolls into contact with the cylindrical body. A centrifugal separator characterized by being attached with.