JPS62277117A - Filtration apparatus - Google Patents

Abstract

PURPOSE:To reduce the cost of edible oil, etc., and to reduce the cost of filtration as well by permitting the continuous execution of a filtration operation without entailing laborious operations associated with the exchange of filter paper. CONSTITUTION:A filter aid is uniformly incorporated into a filtering liquid in a pretreatment chamber 28 and further the filter aid is stuck in a laminar state onto a long belt-like filter member 18 such as filter paper positioned on the 1st filter chamber 13 by the suction force acting in the 1st filter chamber 13 by the operation of a suction and discharge pump 36 to form a precoat layer thereon. A vacuum pressure switch 42 acts and nip rollers 25, 26a constituting a filter member transfer device turn to transfer the filter member 18 when the filter member 18 on the 2nd filter chamber 15 attains the clogging stage. The particle groups constituting the precoat layer act as media to increase the adhesiveness of the impurities to the filter member 18 when said member 18 arrives above the 2nd filter chamber 15. The filtration efficiency is thus improved.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (Field of Industrial Application) The present invention is a method for removing impurities such as frying residue from cooking oil for frying meat, fish, croquettes, potatoes, etc. The present invention relates to a filtration device that performs functions such as effectively preventing oxidation of edible oil.

This type of filtration device can be used in the food industry, for example, to regenerate edible oil by injecting edible oil and feeding heated fried foods in conjunction with a large amount of fried foods such as a sequential fryer. Can be used extensively.

(Prior art) Generally, when frying a large amount of food in a fryer, impurities accumulate in the fryer and adhere to the fried food, or the oxidation of the cooking oil progresses, resulting in a significant loss of flavor and making it unusable. It was necessary to frequently replace the cooking oil with new one as the amount increased. In this case, disposal of cooking oil,
Injecting new edible oil was troublesome. Furthermore, in the food industry where large quantities of food are fried, it has been desired to reduce the cost of edible oil.

To solve this problem, filtration tanks have been provided that have suction and discharge pumps connected to the fryer. In this filtration tank, a filter paper is disposed between the inlet and the outlet of the oil liquid, and the edible oil that flows into the filtration tank from the fryer through the suction pump C2 is filtered through the filter paper.
The discharge pump is configured to return the water to the fryer.

This filters the edible oil to remove impurities, thereby preventing oxidation to some extent, increasing the durability of the edible oil, and reducing the cost of the edible oil.

(Problem to be solved by the invention) However, since edible oil has a high viscosity and a relatively large amount of impurities, the conventional filtration tank described above clogs the filter paper in a short period of time, causing the filter paper to become clogged. It needed to be replaced frequently. In this case, since the temperature of the oil is extremely high, the entire filtration tank is at a high temperature, and it is necessary to wait for it to cool down before replacing the tank, which is still a troublesome problem. In addition, in order to increase the filtration capacity of the conventional filtration tank mentioned above, it is necessary to increase the tank capacity or increase the filter surface by installing a filter paper (= multi-folded) inside the tank. Although it is possible to reduce the usage cost, that is, the cost, there is a problem that the cost required for filtration becomes high.

(Objective of the Invention) The present invention solves the above problems, allows continuous filtration work without using filter paper, that is, without the complicated work of replacing filter paper, and reduces the cost of edible oil, etc. It is an object of the present invention to provide a filtration device that can significantly reduce the filtration cost as well as the filtration cost.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention includes a filter housing that can accommodate a filtrate, and a filter that extends within the filter housing over substantially the entire width of the filter housing, and a long strip-shaped filter member that is moved along one end wall, the bottom, and the other end wall of the filtration housing; A first filtration chamber located on the upstream side in the direction and a second filtration chamber located on the downstream side, connected to one end wall on the first filtration chamber side, and added with a filter aid. a pre-treatment chamber for feeding liquid into the filter housing such that the filtrate level is delayed above the filter member; a filter member transfer device for moving the filter member within the filter housing; and a first filter chamber. A filtration device is provided, comprising a device for leading out a filtrate from an outlet, and a device for leading out a filtrate from an outlet of a second filtration chamber.

(Function) In the filtration device according to the present invention, a precoat 1- made of a filter aid is formed on the filter member especially on the first filtration chamber, and as the filter member is transferred, the precoat 1- is formed on the second filtration chamber. When this is reached, the particles forming the precoat layer serve as a medium, and the adhesion of impurities to the filter member can be increased, and the filtration efficiency is greatly improved.

(Example) Referring to the first hand and the second round, the filtration device aυ includes a filtration housing 0υ, and the filtration housing (
The filter housing (111) is supported by a support frame a" and can be placed on the floor. At the bottom of the filter housing (111) is a first filter chamber (131) which is triangular in shape when viewed from the side.
is expanded on one end wall a, and the second filtration chamber 051 is expanded on the other end wall (le side).The filter housing αυ
Near one end wall of ■ is a pivot bracket pointing upward) (
171, (17a) is provided protrudingly, and a filter roll α is wound with a filter member such as a long strip of filter paper.
The details of j are pivoted.

The filter member a & itself extends over the entire width of the filter housing αD, i.e. the side wall 12 (1, opening and opening), and has a filtration section immediately adjacent to the lower part of one end wall I and the lower part of the other end wall (1i) l, respectively. Although it is arranged to extend in the width direction of the housing αD, it is guided by the idle roller (c).

Also, there is an upward supporting plaque near the other end wall cte of the filter housing αD) Q! 41, (a pair of nip rollers (c) with 24aJ protrudingly provided and capable of sandwiching the filter member α&;

(25a) is held, and the nip roller device.

(25a) Receives the driving force of the motor (not shown) and connects the filter member 0 & held between the filter housing α
Pull the other end wall of B (a) so as to pull it toward the 161 side.

In addition, at the upper part of the support bracket (C24), (24a), a guide roller (to) is pivotally supported on one end wall open side, and an idle roller (c) is supported on the other end wall aυ side of the filter housing αυ. Together with the upper nip roller, a long belt-shaped endless holding member extending over the entire width of the filter housing aυ is guided so as to follow a triangular trajectory when viewed from the side. This holding member □□□- is preferably made of a heat-resistant synthetic fiber cloth, and has four nip rolls.

(It is made to travel along with the rotation of 25aJ.

In this case, when the nip roller device (25a) is rotated by the driving force of the motor, the filter member U mark held therein is guided by the guide rollers tn,a,
Inside the filtration housing (ill), it is transported along one end wall α, the first and second filtration chambers αJ and aS at the bottom, and the other end wall C161, and a guide roller @ on the other end wall αQ side. Between the upper nip roller (c) and the upper nip roller (c), the holding member @ faces nip roller 4 (25a) and is closely fed together with the filter member α&.

Furthermore, a communication duct □□□ of the pre-treatment chamber (to) is connected to one end wall αa of the filtration housing αB above the guide roller, that is, above the traveling level of the filter member o81 at the inner bottom of the filtration housing (ID). The pretreatment chamber itself is equipped with an introduction duct ω for introducing the filtrate containing impurities, and a stirring member ω is installed inside.
This stirring member 01) is rotated when a motor 02 disposed at the top of the pretreatment chamber is energized. Furthermore, a filter aid charging container (to) is removably attached to the top surface of the pretreatment chamber 6υ, so that the pretreatment chamber C311
In this case, filter aid is introduced from the input container ω into the filtrate flowing in from the introduction duct ①, stirred by the stirring member C31), and then passed through the communication duct
In this case, the filter member (110) will be introduced at a position higher than the filter member (110).

On the other hand, a suction/discharge pump mark is connected to the outlet (b) at the bottom end of the first filtration chamber (131) via a suction duct (i351), and the tip of the suction/discharge pump field is connected to the filtration housing. (Drainage duct that bypasses the top of αυ and reaches its interior)
C3η is connected. In addition, a suction/discharge pump t41 is connected to the second filtration chamber (a suction duct at the bottom end of the 15+) C31, and a suction/discharge pump (40
A discharge duct [411] for discharging filtered cooking oil, etc. is connected to the discharge part. In this case, the introduction duct ■ of the pretreatment chamber 0υ and the discharge duct +-nIJ of the suction/discharge pump can be connected to the discharge port and suction port of a fryer (not shown) that continuously fries a large amount of food. .

In addition, the suction and discharge pump (41 is the suction and discharge pump (40)
The vacuum pressure switch (c) is connected so as to be able to detect the suction pressure of The pump (4) is provided to operate when the suction pressure of the pump (4) becomes higher than the set pressure.

It is linked with the drive motor (25a), and works to drive the drive motor for a predetermined period of time when it is activated.

As a result, the motor for driving the nip roller (25a) is moved to the filter member αg located above the second filtration chamber.
Depending on the length of the upper end of the second filtration chamber (151), depending on the length of the upper end of the second filtration chamber (151), each time the clogging of Nip roller (c) for filter member α&.

(δa). That is, in order to be able to perform a smooth filtration action in the second filtration chamber U, in response to excessive clogging of the second filtration chamber (151), the motor for driving the nip rollers (c) and (25a) is intermittently shut down. In addition, a vacuum pressure meter (43) is installed near the vacuum pressure chamber Q2 so that the pressure in the second filtration chamber (US) can be visually checked. is linked to a vacuum pressure switch (a device (not shown) that can change the set pressure of 4z, and
While checking the pressure value in the filtration chamber (+51), the vacuum pressure switch (43) is provided so that the set pressure can be appropriately selected.

In addition, a vacuum pressure switch (electromagnetic valve 04 near 42) is provided, and this electromagnetic valve 141 is connected to the suction duct) C3'1
It is communicated with the second filtration chamber αj via m, and acts to introduce atmospheric air into the second filtration chamber C151 during the opening operation.

As a result, the second filtration chamber tls is usually 600 to 700
The pressure is reduced to m1lHG, and the second filtration chamber (151
When the filter member αg located above becomes excessively clogged, the degree of vacuum in the second filtration chamber becomes too high, which is likely to impede effective filtration or smooth transfer of the filter member. When the degree of pressure reduction in the second filtration chamber (19) becomes too high, the solenoid valve (44) opens and the second filtration chamber αS is immediately brought to normal pressure, ensuring smooth operation of the filtration device (11). It turns out.

Note that the filter housing (111) is preferably covered with a heat insulating material 49 since the temperature becomes considerably high when the filter device al is connected to a fryer for deep-frying dogfish.

Furthermore, the filtering operation of the present invention will be summarized and explained. Now feed the filtrate from the introduction duct 13f) of the pre-treatment chamber (c), add the filtrate 1:filtrate from the charging container (2), and rotate the motor (c) to stir the stirring member. 6B is rotated to uniformly mix the filter aid into the filtrate. In this case, the filter aid is preferably made of diatomaceous earth or cellulose.
When a filtrate mixed with a filter aid using a particle group of ~200μ is sent into the filtration housing αυ, a gL connected to the outlet diagram of the first filtration chamber σ3, which draws out the filtrate. If the suction/discharge pump (G) in the position is activated,
The filter aid is transferred to the first filter by the suction force acting in the first filter chamber αJ.
The precoat layer 0e is applied in a layered manner to the filter member α& located above the filtration chamber αJ. At this time, the filtrate sucked into the first filtration chamber (13) is returned to the filtration housing αυ via the suction/drainage pump (7) and the discharge duct OD.

On the other hand, there is another suction/discharge pump 0cJ connected to the outlet (to) of the second filtration chamber (151), which serves as a device for discharging the filtrate.
is activated, and if the filter member αa on the second filtration chamber α9 has reached a clogged state, the vacuum pressure switch (6)
The nip roller □ acts as a filter member transfer device.
□□, (25a) is rotated. As a result, the filter member (l& is unwound from the filter roll α9, guided by the guide roller, @, nip a-ra
(25a), the first filtration chamber (13
The filter element Ctgj formed from the pre-coat layer above is transferred onto the second filtration chamber (151).

Since this Glycoat J-(4G) consists of a group of particles, impurities in the retaining liquid tend to adhere to the filter member (1 barrel).
= The filtration action is accelerated and quickly performed, impurities are removed and oxidation is prevented, and the quenched processing liquid is discharged for reuse via the suction and discharge pump (40 and discharge duct H41). Ru.

In addition, the filter member αg with accumulated impurities reaches the nip roller (to), (25a) with the filter slag on the filter member 0g sandwiched between the holding member and the nip roller □□□, (25a). 1.Experimental Example Using Bell Co.'s cooking oil waste liquid as the filtrate, the waste liquid was \[+1, 1 liter when filtered only with the filter member (11111), and When filtration is performed using a filter member on which a precoat layer is formed (present invention) (11)
A comparative test was conducted on the three products, and the results shown in the table below were obtained.

Table Chemical oxygen demand Biochemical oxygen Impurity amount (su/2) Required wrinkles (msi'U (su/
2) 1, 922 3580
31501, 200
713 28.3■, 93°3
316 26.0 It was found that impurities were largely removed from the waste liquid, oxidation was suppressed, and the edible oil could be reused.

In addition, in the above-mentioned test, the chemical oxygen demand, biochemical oxygen demand, and impurity amount were measured by J.E.S.
K-0102-17, J Engineering S, K-0102-21
It was carried out according to ゜J Engineering S, K-0102-14, 1.

(Effects of the Invention) According to the present invention configured as described above, impurities can be continuously and automatically removed from the filtrate without replacing the filtration member to prevent oxidation, etc., and also quickly and effectively. By carrying out filtration, a large amount of filtration can be realized, and the cost of filtration (2) can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view of a filtration device according to the present invention, and FIG. 2 is a partial sectional view thereof. 10...M filtration device, 11...filtration housing, 12
...Supporting frame, 13...First filtration chamber, 14.
...One end wall, 15...Second filtration chamber, 16...
Other end wall, 17, 17a... pivot bracket, 1
8... Filter member, 19... Filter roll, 2
0, 21... Side wall, 22, 23... Guide roller, 24, 24a... Support bracket, 25, 2
5a... Nip roll, 26... Guide roller, 2
7... Suppressing member, 28... Pretreatment chamber, 29... Communication duct, 30... Introducing duct, 31... Stirring member, 32... Motor, 33... Input container, 34 ...
Outlet port, 35... Suction duct, 36... Suction and exhaust pump, 37... Discharge duct, 38... Outlet port, 39.
... Suction duct, 40... Suction and exhaust pump, 4 pieces...
Discharge duct, 42... True pressure switch, 43...
・Vacuum pressure meter, 44...Solenoid valve, 45...Insulating material, 46...Precoat layer

Claims (1)

[Claims] 1. A filter housing capable of accommodating a filtrate, and a filter housing that extends within the filter housing over substantially the entire width of the filter housing and that extends to one end wall, the bottom, and the other end wall of the filter housing. a long strip-shaped filter member that is moved along the filter housing; a first filter chamber that is provided on the bottom wall of the filter housing and is located below the filter member and is located on the upstream side in the transport direction of the filter member; The second filtration chamber located therein is connected to one end wall on the first filtration chamber side, and the filtrate containing the filter aid is introduced into the filter housing so that the filtrate level reaches above the filter member. a device for feeding the filter, a device for moving the filter member within the filter housing, a device for drawing out the filtrate from the outlet of the first filtration device, and a device for drawing out the filtrate from the outlet of the second filtration device. A filtration device comprising: a device for extracting water; 2. The filtration device according to claim 1, wherein a stirring member rotated by a motor is installed in the pretreatment chamber, and a charging container containing a filter aid is removably attached thereto. 3. A guide roller for guiding the filter member is provided near the bottom of each end wall in the filter housing, a nip roll for pulling the filter member is provided near the top of the other end wall, and another guide roller is provided near the nip roll. is arranged and moves along a triangular trajectory between the guide roller at the bottom of the other end wall, the upper nip roll, and another guide roll, and the filter is moved between the guide roller at the bottom of the other end wall and the nip roll. 2. The filtration device according to claim 1, wherein a restraining member is suspended from the member and is closely conveyed together with the member.