JP2652491B2 - Filtration 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 filter for filtering liquids such as oils and liquids, and preferably to a filter for removing impurities such as fried scum from frying oil for frying meat, fish, croquettes, potatoes and the like.

[0002] This type of filtration device is used in connection with a fryer or the like which injects and heats frying oil, heats up the frying material, and successively produces a large amount of frying, in order to purify the frying oil and prevent oxidation. It can be regenerated and can be used in various water treatment facilities and the like, and can be frequently used in, for example, the food industry.

[0003]

2. Description of the Related Art Generally, when a large amount of frying is performed by charging and heating frying oil in a fryer or the like, impurities accumulate in the fryer and adhere to the fried food, or the oxidation of the frying oil progresses and the taste deteriorates remarkably. As the amount of fried food increased, it was necessary to frequently replace it with fresh frying oil. In this case the disposal of used frying oil,
The trouble of inputting new frying oil and the like was complicated. Also, in the food industry where a large amount of fried food is to be produced, it has been desired to reduce the cost of frying oil.

To solve this problem, a filtration tank having a suction and discharge pump connected to a fryer has been provided. In this filter tank, a filter paper is arranged between the inlet and the outlet of the oil liquid, and the frying oil flowing from the fryer to the filter tank into the suction pump is filtered by the filter paper, and then again by the discharge pump. It is configured to return to the fryer. This removes impurities by filtering the frying oil, thereby preventing oxidation to some extent, increasing the durability of the frying oil and reducing the cost of the frying oil. However, in this configuration, the viscosity of the frying oil is high,
Since the amount of impurities tends to be relatively large, the filter paper provided in the filtration tank is clogged and the filter paper must be frequently replaced. In this case, since the temperature of the frying oil liquid is high, it is necessary to wait for the cooling to perform the replacement operation, and there is a problem that the operation is still complicated. Further, although the cost for frying oil can be reduced, the cost for filtration is high.

On the other hand, in order to overcome the above-mentioned problems, Japanese Patent Publication No. Sho 62
JP-A-54524 has a filter housing provided so as to introduce frying oil from a fryer or the like, and supplies a web-like filter paper along the inner bottom surface from one end wall side to the other end wall side in the filter housing. Along with being able to send,
The filter paper is provided so as to be movable as needed from one end side to the other end side by a transfer device, and the filter paper is provided so that the filter paper can be sequentially discharged at the other end side, and the frying oil flows out from the lower part of the web-like filter paper. Is disclosed. By introducing the frying oil into the filter housing and applying a negative pressure to the outlet part by a suction force of a pump or the like, when the frying oil passes through the web-shaped filter paper, impurities of the frying oil such as fried scum are removed. In this case, the frying oil can be returned to the fryer, etc., and at the same time, the impurities filtered from the frying oil are deposited and clogged on the web-shaped filter paper located on the inner bottom surface of the filter housing, so that the initial function cannot be performed. In this state, a negative pressure is detected on the introduction side of the pump, and when the detected value exceeds a predetermined value, the transfer device is driven. As a result, the web-shaped filter paper can be discharged from the other end of the filter housing, and the filter paper portion on the inner bottom surface can be transferred, so that the filtration of frying oil can be automated. In this filtration device, workability can be greatly improved in that the filtration can be automated as compared with a conventionally known filtration device.

[0006]

However, in this filtration device, the change in the negative pressure on the inlet side of the pump is extremely small (generally -1 to -2 cmHg) and is unstable. Or, it is too late. If it is too early, the filter paper is wasted. If it is too late, there is a problem that the pressure of the flowing oil liquid drops abnormally.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter device capable of detecting the accumulation and clogging of impurities in a transportable filter paper by filtration in a timely manner and operating the device with high efficiency.

[0008]

According to the present invention, there is provided a filter housing having a filter chamber having an inlet from a container for containing and using a liquid to be filtered; One inner end face 14, inner bottom face 16, and other inner end face 1 of the pores of filtration chamber 13 extend in the width direction of chamber 13.
5, a screen 17 arranged at a predetermined distance from the filter 5 to capture relatively large impurities, an endless conveyor 19 for scraping moving along the screen 17 and rotating relative to the filtration chamber 13, and a filtration chamber. 13 and extends along one of the inner end faces 14, 16 and 15 of the filtration chamber 13.
And movably disposed between the screen 17 and
Web-like filter paper 22 that captures relatively small impurities
A pump for circulating the liquid discharged from the liquid outlet formed in the filter housing 11 below the filtration chamber 13 to a container that contains and uses the liquid, and a pump outlet side And a device for transferring the web-like filter paper 22 when the pressure falls below a predetermined value.

[0009]

In the filter 10 of the present invention constructed as described above, the pressure on the outlet side of the pump is particularly detected, and when this pressure falls below a predetermined value, the web-like filter paper is transferred. Is new and when clogged. A change of several kg / cm ² is captured, and the clogged state can be detected accurately and stably.

Referring to FIG. 1, there is shown a basic configuration of a filtering apparatus according to the present invention. A container VS such as a fryer for containing and using a liquid to be filtered is connected to an inlet of a filter FL. On the other hand, the motor MT is connected to the outlet of the filter FL.
Is connected to the introduction side of the pump PM driven by
The outlet side of the pump PM is connected to the container VS. As a result, the liquid containing impurities sent from the container VS is filtered by the filter F.
Filtered by L and returned to the container VS again via the pump PM. Here, a pressure detector PD is provided on the output side of the pump PM.
The output of the pressure detector PD allows the filter paper of the filter described later to be transported in a timely manner.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2, a specific construction of the present invention will be described. A filter housing 10 is included in a filter 10, and an oil tank such as a fryer is provided on one side wall of the filter housing 11. A liquid inlet 12 provided with a connecting pipe is provided for the filtration chamber 1 in the filtration housing 11.
3 is open. In the filtration chamber 13, a series of screens 17, which are at a predetermined distance from the inner end faces 14, 15 and the inner bottom face 16, which are preferably formed of a perforated plate, and a part of which is located directly below the liquid inlet 12, are provided. Distribution equipment,
The screen 17 allows the oil liquid to permeate freely and is fixed to the side surface of the filtration chamber 13 via a suitable holding attachment (not shown). An endless scraping conveyor 19 having a number of scraping pieces 18 extending preferably in the width direction of the filtration chamber 13 is disposed adjacent to the screen 17. The endless conveyor 19 for scraping extends along the screen 17 with a guide roller (not shown) rotated by a drive motor interposed therebetween, for example.
7 and movably orbitally (clockwise in FIG. 2) with respect to the filtration chamber 13.

As a result, after large impurities in the oil liquid introduced from the liquid inlet 12 are captured on the screen 17,
As the scraping endless conveyor 19 moves, it is moved along the screen 17 by the scraping pieces 18, reaches the upper end of the inner end surface of the screen 17, slides down the short plate 20, and is discharged to the receiving body 21. .

Along the inner end surfaces 14, 15 and the inner bottom surface 16 of the filtration chamber 13, the surfaces 14, 1
A web-like filter paper 2 is provided between the screens 5 and 16 and the screen 17.
2 are arranged along the surfaces 14, 15, and 16 of the filtration chamber 13, and the filter paper 22 is provided so as to capture small impurities and allow oil liquid to permeate freely. The filter paper 22 is unwound from the filter paper roller 24 when necessary by a guide roller / nip roller unit 23 driven by a drive motor (not shown), and is moved in the same direction as the endless conveyor 19 for scraping. Are released to the same side as the release side of the large impurities and are accommodated in the receiver 21. Receiver 2 for filter paper
1 'can also be provided integrally with the receiver 21 of a large impurity. Here, when the accumulation and clogging of impurities on the web-like filter paper 22 exceeds a predetermined limit and the filtration of the oil liquid is not smooth, the pressure is detected by the pressure detector PD at the outlet side of the pump PM shown in FIG. A drop is detected. The output of the pressure detector PD drives the guide roller / nip roller unit 23 in a timely manner. At this time, the change of the negative pressure on the introduction side of the pump PM is, for example, -1 to-
While it is ² cmHg, it is, for example, about 0.4 to 0.5 Kg / cm2 on the outlet side of the pump PM, and it can be understood that the detection is extremely easy.

An endless conveyor 25 for pressing is disposed adjacent to the web-like filter paper 22, and is interposed with a guide roller (not shown), preferably in synchronization with a driving source for moving the filter paper 22. It turns around the filtration chamber 13. The relatively small impurities trapped and deposited on the filter paper 22 by the holding endless conveyor 25 are restrained without being scattered in the filtration chamber 13, and the impurities smoothly move together with the filter paper 22 on the discharge side, that is, above the inner end face 15. Can be released.

Further, the filter housing 11 is formed with an outlet chamber 26 for receiving the oil liquid transmitted through the filter paper 22 so as to substantially surround the filter paper 22. The outlet chamber 26 is connected to a pump PM (see FIG. 1) and the like. Tube 27 is connected. A back-up bypass pipe 28 which is opened at a side wall between the inner bottom face 16 of the filtration chamber 13 and the screen 17 and is equipped with a normally-closed bypass valve (not shown) is mounted, and the bypass pipe 28 is connected. Connected to tube 27. In this case, when the filter paper 22 is wound up by the output of the pressure detector PD, or when the filter paper 22 cannot be transported due to a failure such as breakage, the bypass valve is manually or preferably automatically opened to open the bypass pipe 28. When the oil liquid flows out, the frying oil is bypassed, so that the filter paper 22 can be smoothly wound when the filter paper 22 is wound. Work can be continued without hindrance. Although small impurities are not removed from the frying oil to be bypassed here, relatively large impurities have already been removed by the screen 17, so that a decrease in the filtration function can be minimized.

In addition, desirably, the filter housing 11 is provided with a spacer 29 for limiting the storage amount in the filter chamber 13, and the spacer 29 is provided with a suitable holding device (not shown) on the side surface of the filter chamber 13. Can be fixed through. Accordingly, the amount of the oil liquid stored in the filtration chamber 13 can be reduced by the volume of the spacer 29 submerged in the oil liquid in the filtration chamber 13.

The operation of the filtration apparatus according to the present invention will be briefly described below. A fry oil containing impurities from a vessel such as an oil tank such as a fryer for frying is filtered through a liquid inlet 12 connected to a connecting pipe. 10 are introduced into the filtration chamber 13 of the filtration housing 11. Here, relatively large impurities are captured by the screen 17, and the frying oil passes through the screen 17. The large impurities trapped on the screen 17 are scraped off from the screen 17 by the scraping pieces 18 of the endless conveyor 19 for scraping, and are moved following the rotation of the endless conveyor 19 for scraping.
It reaches the upper end of the inner end surface of the screen 17 and is discharged to the receiver 21. After passing through the screen 17, the frying oil containing relatively small impurities reaches the web-like filter paper 22,
When small impurities are trapped in the filter paper 22, the frying oil permeates through the filter paper 22. The frying oil that has passed through the filter paper 22 and has been cleaned and regenerated can be returned from the discharge chamber 26 to an oil tank such as a fryer via the connecting pipe 27. At this time, if a suction pump (not shown) is arranged at the connection pipe 27 or downstream thereof,
Good circulation of frying oil between the container and the filter 10 can be achieved.

On the other hand, in the web-shaped filter paper 22,
When the portion which is located on the inner bottom surface 16 of the filter 3 and performs a filtering operation cannot perform a predetermined filtration due to accumulation and clogging of small impurities, the pressure mounted on the outlet side of the pump PM shown in FIG. Detected by the detector PD, the guide roller / nip roller unit 23 is driven to move the filter paper 22 until a new unclogged portion of the filter paper 22 is located on the inner bottom surface 16.
To move. Accordingly, the filtration is continuously performed on a new portion of the filter paper 22, and the clogged portions of the filter paper 22 are sequentially stored in the receiver 21 '. At this time, the bypass valve 31
The frying oil from which relatively large impurities have been removed by the screen 17 is sent to the connecting pipe 27 via the backup bypass pipe 28. Thereby, the filter paper 2
2 is reduced in the adsorbing force on the inner surface of the filtration chamber 13, and the filter paper 22
Winding is performed smoothly. Although small impurities are not removed from the frying oil to be bypassed, relatively large impurities have already been removed by the screen 17, so that a decrease in the filtration function can be minimized.

Although the present invention has been described above in connection with an embodiment for realizing the cleaning of frying oil, it will be understood that the present invention can be used in a wide range of water treatment facilities and the like.

[0020]

According to the filter device of the present invention constructed as described above, the deposition of impurities and the clogging particularly on the filter paper can be reduced by a relatively large pressure change at the outlet side of the pump for flowing the liquid to be filtered. Therefore, the clogging of the filter paper can be accurately and stably performed, and the filter paper can be prevented from being transported out of time and filtered with high efficiency.

[Brief description of the drawings]

FIG. 1 is a simplified explanatory diagram of a basic configuration according to the present invention.

FIG. 2 is a simplified sectional view of a filter of a filtration device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Filtration device 11 Filtration housing 12 Liquid inlet 13 Filtration chamber 14 Inner end surface 15 Inner end surface 16 Inner bottom surface 17 Screen 18 Scraping piece 19 Endless conveyor for scraping 20 Shute plate 21 Receiver 21 'Receiver 22 Filter paper 23 Guide roller / nit Roller unit 24 Paper roller 25 Endless conveyor for presser 26 Outlet chamber 27 Connecting pipe 28 Bypass pipe 29 Spacer

Continuation of front page (72) Inventor Takashi Sakai 4-1-1, Nishinakajima, Yodogawa-ku, Osaka-shi, Osaka Nissin Foods Co., Ltd. (56) References JP-A-1-155916 (JP, A)

Claims (1)

(57) [Claims] 1. A filtration housing 1 having a filtration chamber 13 having an introduction portion from a container for containing and using a liquid to be filtered.
1 and a predetermined distance from one inner end face 14, the inner bottom face 16 and the other inner end face 15 of the perforation of the filtration chamber 13 extending in the width direction of the filtration chamber 13 and having relatively large impurities. , An endless conveyor 19 for scraping that moves along the screen 17 and circulates with respect to the filtration chamber 13, and extends in the width direction of the filtration chamber 13, and has one inner end surface 14 of the filtration chamber 13. A web-like filter paper 22 movably disposed along the bottom surface 16 and the other inner end surface 15 between these surfaces 14, 16, 15 and the screen 17 to capture relatively small impurities; A liquid outlet formed in the filtration housing 11 below the liquid outlet 13 and a liquid discharged from the liquid outlet are formed by:
A pump for circulating the liquid to the container to be used and used;
A filter for detecting the pressure at the pump outlet side and, when the pressure is equal to or lower than a predetermined value, transferring the filter paper 22 on the web surface.