JP2005246343A - Oil recovery apparatus for kitchen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil recovery apparatus for a kitchen, which has a good oil recovery efficiency and is also cost-effective. <P>SOLUTION: This oil recovery apparatus 1 for a kitchen comprises a residual soup separation apparatus 2 and a screw 11 disposed so as to be vertically symmetrical with respect to an oil-water separation tank 3. Oil introduced into a casing 10 in the screw 11 by the drive of a rotary blade of the screw 11 is concentrated while forcibly pressing the oil downward by a lower rotary blade 11b. When the concentrated oil again floats, the oil is vertically transferred upward within the casing 10 in the screw 11 while catching the oil by an upper rotary blade 11a, and is discharged through a waste oil pipe 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a device for recovering oil in the remaining juice discharged from a kitchen of a ramen shop, a Chinese restaurant, etc., and in particular, an oil / water separation tank by driving a screw disposed vertically in the oil / water separation tank. The present invention relates to a kitchen oil recovery device that can efficiently recover the oil component floating on the surface of the oil water inside.

  Conventionally, kitchen drainage is generally blocked by a grease wrap. Solid matter such as raw garbage is collected in a basket (strainer mesh) installed at the lower part of the grease trap inlet, and the oily water floats up by separation of specific gravity in the tank. A chef regularly scoops out the inside of the tank with a handle.

  Thus, when the frequency of cleaning is low or the oil concentration in the drainage is high, the oil accumulates in the tank and flows out to the secondary side of the grease trap along with the sudden increase in the amount of drainage. There was an inconvenience. Moreover, the detergent which consists of surfactant used when wash | cleaning tableware has a strong emulsification effect | action, and reduces oil-water separation performance remarkably, and causes the outflow. In particular, animal fats such as lard and head solidify at room temperature and have high adhesion, so that when they flow out, there is a defect that not only the pipes are blocked but also the river is contaminated.

  A floating oil collecting device is used as a means for collecting the oil component floating in the grease strap. This device sucks the outermost oil water with a pump and supplies it to the separation tank, and performs oil-water separation in the separation tank, but in the case of wastewater containing a large amount of animal fats, especially In winter, when the temperature drops, there is a problem that the oil in the separation tank is solidified and difficult to recover, or the hose connected to the pump is clogged with oil or solids.

  As another means, bio-fungus is put into grease trap and oil is decomposed into water and carbon dioxide, but a large grease trap is used to sufficiently retain bio-bacterium in grease strap. A tank is required, and further, the higher the concentration of oil, the longer the decomposition time. In addition, since the biobacteria must be replenished periodically, the running cost has to be expensive.

  Moreover, the apparatus of patent document 1 is also known as an oil-water separation apparatus. Thus, this apparatus comprises a stock solution intake means, a separation tank for separating the stock solution taken from the stock solution intake means, a water storage tank continuous with the separation tank, and a drain tank continuous with the water storage tank And are provided. Thus, the undiluted solution intake means is provided at the center near the longitudinal direction of the separation device, and the upper portion of the undiluted solution intake means has a separation tank when the undiluted internal solution overflows. An inclined surface is formed so as to flow down vigorously, and one end of the inclined surface is provided at a position higher than the liquid level in the separation tank, so that the stock solution taken in from the stock solution inlet overflows upward. It is configured to flow into the separation tank from a position higher than the liquid level. In addition, a guide plate that is curved in an arc shape corresponding to the stock solution flowing down from the inclined surface of the stock solution intake means is provided on the starting end side of the separation tank, and a swirling flow is generated in the stock solution by the arc surface of the guide plate. It is formed to let you. Furthermore, an oil recovery pipe that opens to the upper surface of the oil water causing the swirling flow protrudes from the lower part, and the oil floating on the liquid level is scraped to the oil recovery pipe. A scraping means for collecting is provided. The scraping means is mainly composed of a scraping plate formed of a metal such as stainless steel.

In the oil / water separation device described in Patent Document 1 configured as described above, the level of the oil / water flowing down into the separation tank is formed so as to flow down vigorously when the stock solution overflows. Since the predetermined water level cannot be maintained and the oil component floating on the liquid surface is collected in the oil component collecting pipe by the rotation of the scraping plate, it is not expected to efficiently collect the oil component.
JP, 10-28968, A Paragraph [0012] [0015] [0016] [0019] (FIG. 1) (FIG. 2) (FIG. 3)

  In order to overcome these deficiencies in the conventional examples, the oil content contained in the remaining juice is efficiently recovered to overcome these deficiencies, and a solution is obtained to obtain a kitchen oil recovery apparatus that is advantageous in terms of cost. The technical problem which should be made arises, and this invention aims at solving this problem.

  The present invention has been proposed in order to achieve the above-mentioned object, and the invention according to claim 1 is directed to a separation device for separating foods in the remaining juice and oil water flowing down through the separation device. And an oil / water separation tank for separating oil into water, and a screw arranged vertically in the oil / water separation tank for transferring the oil in the vertical direction. The oil content floating on the upper surface of the oil water in the oil / water separation tank can be continuously transferred upward by driving the screw and taken out via the oil drain pipe while being maintained at the water level. An oil recovery device for a kitchen is provided.

  According to this configuration, the oil component floating on the upper surface of the oil water in the oil / water separation tank is continuously transferred upward by the drive of the screw and taken out via the oil drain pipe, and the oil / water separation tank The water level of the oil water is maintained at a predetermined water level.Furthermore, the oil water flowing down into the oil-water separation tank is separated from foodstuffs and the like by a separation device, and the flow rate of the oil water flowing down to the oil-water separation tank is reduced The fluctuation of the level of the oil water in the oil / water separation tank is controlled as much as possible.

  According to a second aspect of the present invention, the screw is disposed in a casing having an open bottom surface, the rotor blades of the screw are formed in a vertical shape, and the lower rotor blade is opened in an intermediate portion of the casing. The oil that flows in along with moisture from the oil / water inlet is guided downward to concentrate the oil, and the concentrated oil floats from the opening on the lower surface of the casing, and the bottom surface contacts the oil near the oil / water inlet. The kitchen oil recovery apparatus according to claim 1, wherein the kitchen oil recovery apparatus is configured to be transferred upward by an upper rotary blade and discharged from an oil discharge port provided in an upper portion of the casing.

  According to this configuration, the screw is formed into a target shape with the upper and lower rotor blades, and the oil component that has flowed into the screw casing by the lower rotor blade is guided downward together with moisture to concentrate the oil component. The oil component that floats up from the opening on the lower surface of the casing is transferred upward by the upper rotor blade and discharged from the oil discharge port.

  Furthermore, the invention described in claim 3 is configured to send wind pressure from the upper surface of the oil / water in the oil / water separation tank in order to draw the oil component floating on the upper surface of the oil / water in the oil / water separation tank in a certain direction. A kitchen oil recovery apparatus according to 1 or 2 is provided.

  According to this configuration, the oil component floating on the surface of the oil / water in the oil / water separation tank is drawn toward the casing of the screw by the air blown from above the oil / water, and the oil is introduced through the oil / water inlet provided in the casing. It is introduced into the casing.

According to a fourth aspect of the present invention, there is provided a recovery port for recovering oil remaining in the oil / water separation tank together with moisture when the kitchen oil recovery device is stopped and other abnormality occurs. The kitchen oil recovery device according to claim 1, 2 or 3, wherein the oil recovery pipe is provided at a predetermined distance downward from a predetermined water level.

  According to this configuration, when it becomes necessary to stop the kitchen oil recovery device due to closing, etc., the oil remaining in the oil / water separation tank is collected together with moisture through the recovery port provided in the oil discharge pipe or the like. Collected.

  Furthermore, the invention according to claim 5 is characterized in that the separation device comprises an upper mesh and a lower mesh, and the upper mesh is formed with a larger mesh than the lower mesh so as to separate the ingredients in the remaining juice. The kitchen oil recovery apparatus according to claim 1, 2, 3 or 4, wherein the oil water flowing down into the oil / water separation tank is moderated to control the change in the water level in the oil / water separation tank. To do.

  According to this configuration, among the large and small ingredients contained in the remaining juice, a large ingredient is received and stored by the upper mesh, and a smaller ingredient is received and stored by the lower mesh. In other words, the remaining juice to be dropped flows down into the oil / water separation tank with the flow velocity reduced as much as possible by the upper and lower meshes.

  According to a sixth aspect of the present invention, an overflow pipe is provided in the oil / water separation tank for maintaining the liquid level of the oil / water at a predetermined height. The kitchen oil recovery device according to 5, is provided.

  According to this configuration, the liquid level in the oil / water separation tank is maintained at a predetermined height by the action of the overflow pipe.

  Furthermore, the invention according to claim 7 is arranged such that a partition plate having an upper end protruding upward from the water level of the oil water and having an open lower surface is disposed on one side portion of the oil / water separation tank. 7. A kitchen oil recovery apparatus according to claim 1, wherein a partitioned drainage tank is provided, and water in the drainage tank can be discharged through the overflow pipe. To do.

  According to this configuration, only moisture flows into the drainage tank from the lower surface opening of the partition plate, and moisture in the drainage tank is discharged through the overflow pipe.

  The invention according to claim 8 provides the oil recovery apparatus for kitchen according to claim 1, 2, 3, 4, 5, 6 or 7, wherein a heater is disposed at the bottom of the oil / water separation tank. .

  According to this configuration, by turning on the heater disposed at the bottom of the oil / water separation tank, the oil / water in the oil / water separation tank is maintained at a predetermined temperature, and the oil / water surface layer in the oil / water separation tank is solidified with oil. To suppress.

  According to the first aspect of the present invention, the ingredients contained in the remaining juice are separated by the separation device, and when the oil water flows down to the oil / water separation tank, the flow rate of the oil water flowing down is reduced by the separation device. Thus, the fluctuation of the oil water level in the oil / water separation tank can be suppressed as much as possible. Therefore, the oil component floating on the oil water level can be continuously and extremely efficiently driven by the screw. Can be recovered.

According to a second aspect of the present invention, the screw is disposed in a casing having an open bottom surface, and is floated on the surface of the oil water in the oil / water separation tank by the lower rotor blades of the rotor blades formed in a vertical shape. The oil component is sucked into the casing together with moisture from the oil / water inlet port opened in the substantially middle portion of the casing, and is attached to the lower rotor blade and is entangled and forcedly transferred downward. Thus, although the oil component has a buoyancy greater than that of water, it tends to float, but is forced to sink downward by the lower rotor blade. By repeating this action, the oil content is concentrated, and the concentrated oil content re-emerges from the lower open portion of the casing, and reaches the vicinity of the oil water inlet at the middle portion of the casing. At this time, the concentrated oil is gripped by the upper rotor blade whose lower end is in contact with the oil near the oil water inlet, and is drawn between the upper rotor blade and the casing to form a liquid film and seal It will be in the state. In this way, the liquid film seals the gap between the inner periphery of the casing and the upper rotor blade, so that the oil can be transferred in the vertical direction by the rotation of the upper rotor blade. Thus, in addition to the effect of the invention of claim 1, the oil recovery efficiency is further subsidized.

  In the third aspect of the present invention, the oil component floating on the surface of the oil / water in the oil / water separation tank is introduced toward the casing of the screw by the air pressure and sequentially introduced into the casing from the oil / water inlet provided in the casing. In addition to the effects of the invention described in claim 1 or 2, continuous oil recovery efficiency is further subsidized.

  In the invention according to claim 4, when it is necessary to stop the kitchen oil recovery device due to closing or the like, the oil remaining in the oil / water separation tank is collected together with moisture in the oil recovery pipe. It is recovered through. However, by providing the recovery port at a depth of about 3 to 5 mm from the oil / water surface, surface water of about 3 to 5 mm can be forcibly drained from the oil / water surface. No phenomenon such as solidification occurs. Further, when the oil recovery device is driven, it is natural that the oil recovery device is smoothly driven and the oil content in the oil / water separation tank is recovered by closing the recovery port with a rubber plug or the like. It is.

  Further, according to the invention of claim 5, large and small solids contained in the remaining juice are efficiently received by the upper and lower meshes, and only the oil water flows down into the oil-water separation tank. Accordingly, the flow rate of the oil water flowing down into the oil / water separation tank is relaxed, and hence the liquid level fluctuation in the oil / water separation tank can be suppressed as much as possible. In addition to the effects described in 4, the oil recovery efficiency floating on the liquid surface can be further subsidized.

  In the invention described in claim 6, the oil / water liquid level in the oil / water separation tank is held at a constant height by an overflow pipe installed in the oil / water separation tank. Therefore, in addition to the effect of the first, second, third, fourth or fifth aspect, the oil recovery efficiency by screw drive can be further improved.

  According to the invention of claim 7, only the oil-water moisture in the oil-water separation tank flows into the drainage tank from the lower surface opening portion of the partition plate, and the moisture in the drainage tank is discharged through the overflow pipe. Therefore, in addition to the effect of the invention according to claim 1, 2, 3, 4, 5 or 6, continuous oil recovery can be more efficiently executed by driving the oil recovery device.

  In the invention according to claim 8, since the heater is installed at the bottom of the oil / water separation tank, the oil / water in the oil / water separation tank is held at a predetermined temperature when the heater is turned on. In addition to the effects of the invention described in 2, 3, 4, 5, 6 or 7, the oil / water surface layer in the oil / water separation tank is not solidified by the oil and the function of the oil recovery device is not reduced.

The present invention comprises a separating device for remaining juice, an oil / water separation tank, and a screw arranged in a vertical shape, and the oil taken into the casing of the screw is rotated at the lower part by driving the rotor blades of the screw. Concentrate the oil by forcibly pushing it downward with a blade, and transfer it in the screw casing vertically while grabbing the oil with the upper rotor blade when the concentrated oil re-floats In this way, the oil is recovered through the oil drain pipe, thereby realizing the oil recovery extremely efficiently.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In the figure, reference numeral 1 denotes a kitchen oil recovery device. In this embodiment, the kitchen oil recovery device 1 is suspended at the oil / water inlet, and separates the separation device 2 for separating food contained in the remaining juice, the oil / water separation tank 3, and the oil / water separation tank 3. An oil content recovery device 4 arranged in a vertical direction inside, a partition plate 5 open on the lower surface provided on one side of the oil / water separation tank 3 in a vertical direction, and a drainage tank 6 partitioned by the partition plate 5. An overflow pipe 7 provided in the drainage tank 6, an oil discharge pipe 8 for discharging oil discharged from an oil discharge port opened above the oil recovery device, and the oil-water separation It consists of a heater 9 installed at the bottom of the tank 3.

  Thus, the separation device 2 comprises an upper mesh 2a and a lower mesh 2b, and the upper mesh 2a has a larger mesh than the lower mesh 2b and is a relatively large food contained in the remaining juice. The upper mesh 2a is received and accommodated in the upper mesh 2a. Further, the food material smaller than this is passed through the mesh of the upper mesh 2a and received by the lower mesh 2b formed in a small mesh, and is accommodated in the lower mesh 2b. It is comprised so that. In this embodiment, the mesh of the upper mesh 2a is formed at about 2 mm. Therefore, first, foods of 2 mm or more are collected by the upper mesh 2a, and foods smaller than this are collected by the lower mesh 2b.

  As described above, the remaining juice introduced from the inlet is first recovered by the upper mesh 2a, and at the same time, the flow rate of the oil flowing down into the lower oil / water separation tank 3 is temporarily relaxed. By 2b, the food material smaller than the food material is recovered, and at the same time, the flow rate of the oil water flowing down into the oil water separation tank 3 is secondarily reduced. Thus, the oil recovery function can be smoothed by floating on the liquid level without causing a large fluctuation in the level of the oil water in the oil / water separation tank 3.

  In the oil / water separation tank 3, the oil / water flowing down into the oil / water separation tank 3 is roughly separated into oil and water by specific gravity difference separation in the oil / water separation tank 3, and the oil is floated on the surface of the oil / water. . The oil recovery unit 4 is disposed vertically in the upper part of the oil / water separation tank 3. Thus, as shown in FIG. 4, the oil content recovery device 4 has a screw 11 disposed in a casing 10 that is open on the lower surface, and the screw 11 is an upper portion formed in an upper and lower object shape at the center thereof. It consists of a rotor blade 11a and a lower rotor blade 11b. Thus, by driving the screw 11, the lower rotor blade 11b pushes the oil water, particularly the oil component, introduced into the casing 10 downward from the oil water introduction port 12 provided at the substantially central portion of the casing 10 to float. The oil component is formed so that it is pushed in one after another when it overlaps with the oil component to be concentrated, and the concentrated oil component re-floats in the oil-water separation tank 3 from the lower surface opening portion 10a of the casing 10. At this time, the concentrated oil that re-floats reaches the vicinity of the oil / water inlet 12 of the casing 10, but the upper end is driven by the upper rotor blade 11 a whose lower end is in contact with the oil / water near the oil / water inlet 12. The oil component that has been swept up by the rotor blade 11a and initially swept up forms a liquid film in the gap between the inner peripheral surface of the casing 10 and the outer periphery of the screw 11, and has a sealing property. It will last. When the seal by the liquid film is generated in the gap between the screw 11 and the inner periphery of the casing 10, the oil component is transferred vertically upward by driving the upper rotor blade 11 a, and the oil component exhausted in the upper portion of the casing 10 is discharged. It is comprised so that it can discharge | emit via the oil drain pipe 8 from the exit 10b.

  In addition, as described above, the lower end portion of the upper rotor blade 11a needs to be in contact with the liquid level in order to lift the oil component by the upper rotor blade 11a. However, in this embodiment, the liquid surface is always constant. The overflow pipe 7 is provided to maintain the height. That is, the overflow pipe 7 always determines and maintains the liquid level in the oil / water separation tank 3 at a constant height.

  Further, the water separated in the oil / water separation tank 3 passes through the lower surface opening 5 a of the partition plate 5 and flows into the drain tank 6 partitioned by the partition plate 5, and then into the drain tank 6. The overflowed water can be drained to the outside through an overflow pipe 7 provided in

  Furthermore, when the temperature of the oil / water in the oil / water separation tank 3 is lowered, the oil component is solidified at the surface layer portion of the oil / water and the fluidity is attenuated. In the case of a liquid whose fluidity is attenuated in this way, it becomes difficult to take in the oil water into the casing 10 by driving the screw 11, and therefore the oil water temperature in the oil water separation tank 3 is always maintained at an appropriate temperature. Therefore, if necessary, by turning on the heater 9 installed at the bottom 3a of the oil / water separation tank 3, the oil / water temperature in the oil / water separation tank 3 is always maintained at an appropriate temperature, and the solidification phenomenon of the oil due to the temperature decrease is caused. Therefore, various adverse effects due to solidification of the oil can be eliminated.

  Further, in order to promote the separation of the oil / water in the oil / water separation tank 3, if necessary, the oil content is determined by blowing the wind pressure from above the liquid level of the oil / water separation tank 3 by the fan 13 perpendicularly to the liquid level. It is configured so that oil can be collected efficiently by accumulating in the direction.

  In addition, when it is necessary to stop the operation of the kitchen oil recovery apparatus 1 of the present invention due to the closing of the store or the like despite the oil remaining in the oil / water separation tank 3, the temperature of the remaining oil is decreased. As a result, the oil is solidified, and the oil recovery apparatus 1 may be damaged. Therefore, in the present invention, a recovery port 14 for recovering oil together with moisture is provided in the middle portion of the oil drain pipe 8. Of course, when the oil recovery apparatus 1 is driven, the recovery port 14 is closed by a plug body 14a made of a rubber plug or the like, which hinders a normal oil recovery function by driving the oil recovery apparatus 1. It is configured so that there is no danger. Moreover, the recovery port 14 can forcibly drain the surface oil water of about 3 to 5 mm from the liquid surface by removing the plug 14a. In that case, after the drive of the oil recovery device 1 is stopped, the oil remaining in the oil / water separation tank 3 can be recovered quickly and efficiently, and therefore various adverse effects due to solidification of the residual oil. Can be prevented in advance.

  Thus, according to the present invention, the oil generated in the store can be continuously recovered, and the recovered oil can be easily discarded. In addition, since the oil concentration in the waste water can be suppressed as much as possible, the frequency of cleaning the grease lap, which has been conventionally performed by cooks, can be greatly reduced. Furthermore, maintenance work becomes easier and work efficiency is improved as compared to a grease wrap which is often installed outdoors because of work in the kitchen.

  In the figure, reference numeral 15 denotes a partition wall provided in the oil / water separation tank 3, and the oil / water separation tank 3 is formed by the partition wall 15 and the outer wall 16. Reference numeral 17 denotes a funnel can, and the oil recovered by the screw 11 is discharged into the funnel can 17 through the oil discharge pipe 8 and recovered. The oil in the funnel can 17 is discarded by an appropriate means. Reference numeral 18 denotes a motor for driving the screw 11.

In order to confirm the oil / water separation performance of the kitchen oil recovery apparatus in the embodiment of the present invention configured as described above, the concentration of oil in the waste water when 20 cc lard is put into 500 cc hot water five times at intervals of 4 seconds. Was 10 ppm. In addition, 20cc lard is added to 500cc hot water at intervals of 30 seconds.
The oil concentration in the wastewater when it was charged once was 12 ppm. Furthermore, the moisture content in the recovered lard was less than 5%.

  The amount of lard transferred by the screw varies depending on the lard concentration, but the transfer ability improves as the concentration increases. In the experiment, 200 cc lard was added and the amount of transfer per hour was measured, but the transfer capacity was a minimum of 5 cc / min and a maximum of 20 cc / min. Further, if the amount of lard input is increased, the transfer amount can be increased.

  The relationship between the amount of lard input and the amount recovered was almost the same. 100 cc lard was added to 1000 cc hot water, and the recovered amount was 98 cc, which was substantially the same.

  It should be noted that the present invention should not be limited to the above-described embodiment. For example, the present invention is incorporated in a commercial sink, or is integrated with a garbage disposal machine that is currently in practical use. You may enable it to process simultaneously the processing of the oil content in it. In addition, the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified one.

The top view which shows one Example of the oil recovery apparatus for kitchens concerning this invention. AA sectional view taken on the line AA of FIG. The front view of the oil-component collection | recovery apparatus of this invention. FIG. 4 is a partially cutaway front view of FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Kitchen oil recovery apparatus 2 Separation apparatus 2a Upper mesh 2b Lower mesh 3 Oil-water separation tank 3a Bottom part 4 Oil content collection apparatus 5 Partition plate 5a Lower surface opening part 6 Drainage tank 7 Overflow pipe 8 Draining pipe 9 Heater 10 Casing 10a Lower surface opening part 10b Oil outlet 11 Screw 11a Upper rotor blade 11b Lower rotor blade 12 Oil / water inlet 13 Fan 14 Recovery port 18 Motor

Claims (8)

A separation device for separating the ingredients in the remaining juice, an oil / water separation tank for separating oil and water flowing down through the separation device into oil and moisture, and a vertical arrangement in the oil / water separation tank A screw for transferring the oil in the vertical direction,
While the oil water is maintained at a predetermined water level in the oil water separation tank, the oil floating on the upper surface of the oil water in the oil water separation tank is continuously transferred upward by driving the screw, and the oil drain pipe Oil recovery device for kitchen, characterized in that it can be taken out via a kitchen   The screw is disposed in a casing that is open on the lower surface, and the rotor blades of the screw are formed in a vertical shape, and the lower rotor blade is an oil component that flows in along with moisture from an oil / water inlet port that is opened in the middle part of the casing. The oil component is concentrated by inducing downward, and the concentrated oil component floats from the lower surface opening of the casing and is transferred upward by the upper rotor blade whose lower end surface is in contact with the oil water near the oil water inlet. The kitchen oil recovery apparatus according to claim 1, wherein the kitchen oil recovery apparatus is configured to be discharged from an oil discharge port provided in an upper portion of the casing.   3. The kitchen according to claim 1, wherein wind pressure is sent from the upper surface of the oil / water in the oil / water separation tank in order to bring oil components floating on the upper surface of the oil / water in the oil / water separation tank in a certain direction. Oil recovery device.   When stopping the kitchen oil recovery device, a recovery port for recovering the oil remaining in the oil / water separation tank together with moisture has a predetermined distance from the predetermined water level downward, and the oil drain pipe, etc. The kitchen oil recovery apparatus according to claim 1, 2 or 3.   The separation device is composed of an upper mesh and a lower mesh, and the upper mesh has a larger mesh than the lower mesh, and at the same time the ingredients in the remaining juice are separated by the separation device, The kitchen oil recovery apparatus according to claim 1, 2, 3 or 4, wherein the oil water flowing down into the oil-water separation tank is relaxed to control the change in the water level in the oil-water separation tank.   The overflow pipe for maintaining the height of the liquid level of the oil water at a predetermined height is disposed in the oil water separation tank. Oil recovery device.   On one side of the oil / water separation tank, there is provided a partition plate having an upper end protruding upward from the water level of the oil water and the lower surface being opened, and a drain tank partitioned by the partition plate is provided, and the overflow The kitchen oil recovery apparatus according to claim 1, 2, 3, 4, 5 or 6, wherein water in the drainage tank can be discharged through a pipe.   The kitchen oil recovery apparatus according to claim 1, wherein a heater is disposed at the bottom of the oil / water separation tank.

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