JP2010131503A - Oil-water separating/collecting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil-water separating/collecting apparatus that effectively collects a floating oil in a grease trap where cookroom wastewater containing miscellaneous solid contents such as waste of food material is stored and purifies the wastewater. <P>SOLUTION: The oil-water separating/collecting apparatus includes: an oil-water separating/collecting tank 2; a skimmer unit 4 that sucks the floating oil in the grease trap 3; an inflow pipe 6 that upwardly supplies the sucked floating oil to the central section of the oil-water separating tank 2 through a pump 5; at least two-step top-opened bamboo hat gradient rack 7; a water-level controller 8 having a discharge port 8c whose height is controllable at a position lower than the upper portion of the oil-water separating tank 2; a floating oil scrubbing device 11 provided on the upper portion of the oil-water separating tank 2; and an automatic cleaning device 10 that cleans the discharge port 8c of the water-level controller 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an oil / water separation and recovery device that effectively recovers floating oil in a grease trap installed in a kitchen, a food factory, or the like, and purifies waste water.

Sewage discharged from commercial kitchens such as restaurants, hotels, cafeterias, and school lunch centers is not required to be drained directly into public sewage, but is separated into oil and water by grease traps and then discharged as waste water. Yes.
Grease straps only have a function of once blocking waste oil, so if left untreated, oil and fat and sludge accumulate, causing bad odors, clogging of pipes, generation of pests, and environmental pollution.

  For this reason, many offices regularly request a vacuum cleaner to perform vacuum suction. However, this work requires a lot of labor, time, and costs, and the room can be filled with odors during the work. Various apparatuses have been proposed for the purpose of solving such problems.

  In Patent Document 1, a sewage tank having an inlet and a drain outlet, and a partition provided to partition between the inlet and the drain outlet by providing a gap for running water between the bottom of the sewage tank, A partition provided inside the sewage tank so as to form a plurality of flow paths between the inlet and the drain, a microbial supply pipe for selectively sending sewage decomposition microorganisms to each flow path, and A grease trap having a heater for selectively heating sewage in each flow path to a temperature suitable for decomposition and a gas supply pipe for supplying gas to the sewage in each flow path is disclosed. In this device, the sewage tank is divided into a plurality of flow paths by a partition wall, so if sewage is stored in one of the flow paths and treated with sewage decomposing microorganisms, and the decomposition process is sufficiently advanced By draining it, the sewage is purified and drained.

  Further, Patent Document 2 has an apparatus main body that is divided into a separation tower and a purification tower inside a container whose upper part is opened by a separation blocking wall, and the cross section of the separation blocking wall is near the upper part of the central part of the apparatus main body. Inclined diagonally from the middle of the height, shuts off the main body of the device, forms a purification tower containing only the upper volume divided into two, and a separation tower containing the lower volume. There is a pumping means for pumping up turbid water containing waste oil floating on the top of a collection tank (grease wrap) that collects garbage and waste oil from wastewater containing waste oil flowing in, using a pump. It uses turbid water containing waste oil to pump up to the upper part of the main body of the equipment through the pumping pipe, and has means to disperse the turbid water near the middle of the separation tower, and floats on the upper part of the separation tower for a long time. Waste oil inspection means to inspect the accumulated floating waste oil and recover It has waste oil recovery means, has means to pump up the staying purified water from the lower part of the separation tower from the lower part of the separation tower to the upper part of the purification tower, passes through the water purification pipe that discharges the purified water from the lower part of the purification tower, and returns to the recovery tank. A floating oil automatic recovery device having a control means for continuously and continuously collecting and controlling various means is disclosed. This floating oil automatic recovery device automatically circulates the stored turbid water containing the floating waste oil from the recovery tank for a long time continuously, and recovers the floating accumulated waste oil that has floated and accumulated on the upper part of the separation tower for a long time. Therefore, the recovery rate is high, so the waste oil component contained in the wastewater from the recovery tank to the natural environment can be greatly reduced.

  Patent Document 3 discloses a separation apparatus that substantially separates at least two kinds of at least partially immiscible substances (eg, gasoline and water) having different densities or specific gravities from each other, and includes at least two kinds of at least parts. Inlet means for introducing a mixture of non-immiscible substances, separation means for separating the mixture at least partially into at least a first part and a second part, one of which discharges the first part of the separated substance, The second comprises at least two outlet means for discharging the second part of the separated material, said separation means comprising a baffle device for inducing the separation of at least two materials, the baffle device being a mixture to be separated; Form a flow path through which the flow of the mixture flowing along the flow path for a time sufficient to at least partially separate the mixture in two parts. In order to induce separation of at least two kinds of substances in the baffle device, the baffle device is provided with a first surface spaced from the second surface. Provides a central opening for baffle around, the flow direction along the flow path passes through or through the first part of the baffle and around the second part of the baffle, or A separation device is disclosed in which the flow path is configured such that a flow such as a convection or a rotating flow in a second direction penetrating the second portion is formed.

JP 2004-57847 A Noto 3071824 gazette Japanese National Patent Publication No. 10-503420

  The grease trap disclosed in the above-mentioned Patent Document 1 has a partition wall and a sewage tank divided into a plurality of flow paths, so that sewage is stored in one of the flow paths and treated with a sewage decomposition microorganism. However, wastewater is purified and drained after it has been sufficiently decomposed, but it takes time to decompose wastewater by microorganisms. Moreover, since microorganisms overflow from the sewage tank due to the inflow of sewage, it is practically difficult to use.

  The floating oil automatic recovery device disclosed in Patent Document 2 recovers the floating accumulated waste oil that has floated and accumulated on the upper part of the separation tower for a long time, but because the waste oil is recovered from the bottom of the separation tower. When the waste oil is discharged in a state where the waste oil layer does not reach the bottom of the separation tower, there is a problem that a lot of waste water is mixed.

The separation device disclosed in Patent Document 3 is mainly for separating oil and water from the mixed waste liquid of gasoline, heavy oil, etc. leaked from the floor of the oiling station, etc., and rainwater or sprinkling. When trying to use oil for oil-water separation of grease traps containing not only oil but also noodle flour, vegetable scraps, etc., several problems arise. That is, in the separation apparatus described in Patent Document 3, since the baffle densely overlapped in a spiral state is used, noodle powder other than oil, vegetable scraps and the like are easily scummed and frequently cleaned. Necessary. In addition, the oil supplied from the grease trap to the separation device includes vegetable oil and animal oil, and especially animal oil (such as lard) hardens when the temperature is low, so it overflows from the outlet at the top of the separation device. It becomes difficult and stays. Furthermore, if the liquid level of the separation device is set at a higher level of the drain pipe, there is a problem that solid matter adheres to the inside of the drain pipe and the oil cannot be discharged as designed.
If these problems are not taken into consideration, the above apparatus cannot be used for kitchen use.

  Various devices have been proposed as described above, but the fact is that the majority of them have been removed because there are many troubles caused by clogging due to scum and the operation is not stable. In order to keep costs down, there are a number of places that are discharged only by aeration (24-hour aeration), which is a simple method, without regular vacuuming, and the number is increasing. In this method, since only the inside of the tank is stirred, all of the emulsified oil and fat flows out into the sewage and the like, which causes an increase in environmental pollution.

  Therefore, the present invention effectively recovers the floating oil in the grease trap, which contains oil that solidifies at low temperatures and also contains kitchen wastewater containing miscellaneous solids such as flour, noodle flour, and vegetable scraps. An object of the present invention is to provide an oil / water separation and recovery device for purifying wastewater.

  In order to solve the above problems, an oil / water separation and recovery device according to a first configuration of the present invention includes an oil / water separation tank, a skimmer unit that sucks floating oil in a grease trap, and pumps floating oil sucked by the skimmer unit. An inflow pipe that feeds upward to a central portion in the oil / water separation tank through the pipe, and at least two top opening caps that are detachably installed in the oil / water separation tank above the discharge port of the inflow pipe And a water supply port connected to a position above the bottom of the oil / water separation tank, a water supply port of a water level adjustment pipe connected to a position above the bottom of the oil / water separation tank, and an upper portion of the oil / water separation tank A water level adjusting device having a drain outlet whose height can be adjusted at a lower position, a drain pipe connected to the vicinity of the drain outlet of the water level adjusting pipe, and the oil / water separation tank An oil overflow port provided in the upper part of the oil, a floating oil scraping device provided in the upper part of the oil / water separation tank, a heater provided in the oil / water separation tank, and a drain port part of the water level adjusting pipe. An automatic cleaning device for cleaning, and a sludge valve for discharging sludge provided at the bottom of the oil / water separation tank are provided.

  In this first configuration, the floating oil is sucked by the skimmer unit installed on the grease strap, and the floating oil is supplied upward to the central portion in the oil / water separation tank by the pump and the inflow pipe. The reason why the oil is supplied upward is to prevent the sludge precipitated at the bottom of the oil / water separation tank from being rolled up. The oil-containing sewage supplied upward into the oil-water separation tank is guided to the upper part of the oil-water separation tank by the lower surface of the top-opening shade-shaped inclined rack, and the oil becomes liquid level due to the difference in specific gravity between the oil and water. Floating, moisture and sludge are received on the upper surface of the inclined rack by the convection flow inside the oil-water separation tank. Sludge having a relatively large specific gravity falls on the slope of the upper surface of the inclined rack and settles at the bottom of the oil / water separation tank. The inclined rack is provided with at least two stages to reduce the speed of accumulation at the bottom of the oil / water separation tank. If the number of steps of the inclined rack is increased too much, it becomes a shadow of the upper inclined rack, so that solid matter does not easily accumulate on the upper surface of the lower inclined rack, resulting in poor efficiency and a lot of maintenance work. The inclined rack is made detachable in order to facilitate cleaning and maintenance in the oil / water separation tank.

  The level of the liquid level in the oil / water separation tank is equal to the height of the drain of the water level adjusting device installed at the side of the oil / water separation tank. The height of the drain outlet can be adjusted, and by adjusting this height, the level of the liquid level in the oil / water separation tank is optimally adjusted. The level of the liquid level in the oil / water separation tank is delicate, and if it is high, moisture is discharged together with the oil, and if it is low, the oil is not discharged. Here, even if the height of the drain outlet is adjusted appropriately at the beginning, dirt (scum) contained in the waste water flowing in the water level adjusting pipe adheres to the inner wall of the water level adjusting pipe and the vicinity of the drain outlet. In particular, scum tends to adhere when the operation of the apparatus is stopped. If it does so, the liquid level in an oil-water separation tank will fluctuate | move to the higher side, and the water | moisture content contained in the liquid which overflows from an oil overflow port will increase. If it does so, the collection | recovery efficiency of oil will fall. Therefore, by operating the automatic cleaning device after the shutdown of this equipment and cleaning the drain outlet part of the water level adjustment pipe, always keep the drain outlet part free of dirt and deposit, and the liquid level is appropriate. To be kept.

A floating oil scraping device for scraping the upper oil layer to the oil overflow port is provided at the upper portion of the oil / water separation tank, and the highly viscous oil is scraped by operating this device. If the oil is vegetable oil, the viscosity is relatively low, but animal oil is highly viscous and does not naturally flow out of the overflow. Therefore, a floating oil scraping device is used. Even so, the oil will harden in the winter, so heat it to about 40 ° C with a heater so that it won't harden, and make it fluid and scrape.
After two to three months, sludge accumulates at the bottom of the oil / water separation tank, so the sludge is discharged by opening the sludge valve.

  According to a second configuration of the present invention, the floating oil scraping device is configured to rotate the comb-shaped scraping plate to scrape the floating oil to the oil overflow port. When the scraping plate is a rectangular plate, the oil layer is integrally recessed downward and the scraping efficiency is poor, but providing the comb-like irregularities makes the oil layer broken and easily discharged.

According to a third configuration of the present invention, the automatic cleaning device is a cleaning brush that is normally retracted to the upper part of the drain outlet of the water level adjusting pipe and that moves up and down to the drain outlet during cleaning. Is.
As a result, during normal operation, the cleaning brush retracts to the upper part of the drainage port part of the water level adjustment pipe and does not interfere with the oil / water separation operation. It is cleaned and scum is no longer attached.

According to a fourth configuration of the present invention, the pump is a diaphragm pump.
When a rotary pump is used as a pump that assembles floating oil in the grease trap into the oil / water separation tank, the oil and water are mixed finely and emulsified, making it difficult to separate the oil / water in the oil / water separation tank. Will be applied. Therefore, when a diaphragm type pump is used, the operation is merely to suck in and push out the floating oil, so that the oil and moisture are not emulsified and the oil recovery rate is increased.

  According to the present invention, the oil / water separation tank, the skimmer unit that sucks the floating oil in the grease wrap, and the floating oil sucked by the skimmer unit is supplied upward to the central portion of the oil / water separation tank via the pump. An inflow pipe, an at least two-stage top opening shade-shaped inclined rack detachably installed above the outlet of the inflow pipe in the oil / water separation tank, and an upper part from the bottom of the oil / water separation tank. A water level adjusting pipe having a drain port whose height is adjustable at a position lower than the upper part of the oil / water separation tank, a drain pipe connected to the vicinity of the drain port of the water level adjusting pipe, An oil overflow port provided in the upper part of the oil / water separation tank, a floating oil scraping device provided in the upper part of the oil / water separation tank, and an inside of the oil / water separation tank It is solidified at low temperature by having a heated heater, an automatic cleaning device for cleaning the drain outlet of the water level adjustment pipe, and a sludge valve for sludge discharge provided at the bottom of the oil / water separation tank. It is possible to effectively recover the floating oil in the grease trap in which the kitchen waste water that contains miscellaneous solids such as wheat flour, noodle flour, vegetable scraps, etc. . In addition, the oil / water separation and recovery apparatus of the present invention can be provided at a low cost because of its simple component structure, and can provide a very beneficial effect in preventing environmental pollution.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an overall configuration of an oil / water separation and recovery apparatus according to an embodiment of the present invention, FIG. 2 (a) is a plan view thereof, (b) is a right side view thereof, and FIG. The structure of the inclination rack which concerns is shown, (a) is a top view, (b) is a side view. 4A and 4B show the configuration of the skimmer unit according to the present embodiment. FIG. 4A is a front view, and FIG. 4B is a plan view. FIG. 5 shows a water level adjustment unit according to the present embodiment, wherein (a) is a side view with an automatic cleaning device attached, (b) is a front view with the automatic cleaning device removed, and (c). Is a plan view thereof. 6A and 6B are front views of the automatic cleaning apparatus according to the present embodiment, in which FIG. 6A is a standby state, and FIG. 6B is a partial cross-sectional view in a cleaning state. FIG. 7 is a front view showing a floating oil scraping device according to the present embodiment, FIG. 8 shows a configuration of a scraping plate in the floating oil scraping device, (a) a front view, and (b) a plan view.

  In these drawings, the oil / water separation and recovery apparatus 1 according to the present embodiment includes an oil / water separation tank 2, a skimmer unit 4 that sucks floating oil in the grease strap 3, and floating oil sucked by the skimmer unit 4. An inflow pipe 6 that feeds upward to the central part in the oil / water separation tank 2 via the pipe, and an at least two-stage top part that is detachably installed above the outlet 6a of the inflow pipe 6 in the oil / water separation tank 2 An open rack-shaped inclined rack 7 and a water supply port 8b of the water level adjusting pipe 8a are connected to a position above the bottom of the oil / water separation tank 2, and a drain outlet whose height can be adjusted at a position lower than the top of the oil / water separation tank 2. A water level adjusting unit 8 having 8c, a drain pipe 9 connected in the vicinity of the drain port 8c of the water level adjusting unit 8, an oil overflow port 10 provided in the upper part of the oil / water separation tank 2, and oil water A floating oil scraping device 11 provided in the upper part of the separation tank 2, a heater 12 provided in the oil / water separation tank 2, an automatic cleaning device 13 for cleaning the drain port 8c of the water level adjustment unit 8, And a sludge valve 14 for discharging sludge provided at the bottom of the oil / water separation tank 2.

The inflow pipe 6 and the water level adjustment pipe 8a are attached to the same side of the oil / water separation tank 2, but in FIG. 1, they are shown as being provided on both sides for the sake of easy viewing.
The two-stage inclined rack 7 is detachably attached to the oil / water separation tank 2 by a column 16. As shown in FIG. 3, the inclined rack 7 is provided with a hole 7a through which the sewage floats at the top and through which the heater 12 passes, and a handle 7b is attached to both sides for facilitating insertion and removal. The reason why the inclined rack 7 is detachable is to facilitate cleaning and maintenance in the oil / water separation tank 2.

  As shown in FIG. 4, the skimmer unit 4 includes a main body 41 installed in the grease strap 3 and a movable cylindrical portion 42 that floats and sinks following the liquid level of the grease strap 3. The suction ring 43 at the upper part of the cylindrical part 42 moves up and down by the float 44 in accordance with the level of the liquid level of the grease strap 3. The floating oil that has flowed into the main body 41 of the skimmer unit 4 is introduced into the oil / water separation tank 2 from the screw socket 45 provided in the main body 41 via the diaphragm pump 5 and the inflow pipe 6 in this embodiment. The There is a rotary pump as the pump 5, but in the case of a rotary pump, oil and water are mixed finely with a blade or the like to be emulsified, making it difficult to separate the oil and water in the oil / water separation tank 2, It will hang. Therefore, when the diaphragm type pump 5 is used, it is an operation of simply sucking or extruding the floating oil, so that the oil and moisture are not easily emulsified, and the oil recovery rate is increased. As shown in FIG. 1, a check valve 52 is provided in front of the diaphragm type pump 5 so that the liquid does not flow backward when the diaphragm type pump 5 is sucked and pushed out. Further, a screwed cheese 51 is provided between the check valve 52 and the skimmer unit 3, and when a foreign object or the like is clogged between the outlet of the skimmer unit 3 and the inlet of the inflow pipe 6, the screwed cheese 51 is provided. 51 is removed so that it can be easily removed by backwashing with a water hose or the like.

  The water level adjustment unit 8 of the present embodiment is shown in FIG. The level of the liquid level in the oil / water separation tank 2 becomes equal to the height of the drain 8c of the water level adjusting pipe 8a installed on the side of the oil / water separation tank 2. The height of the drainage port 8c can be adjusted by changing the height of the slide plate 83 provided between the inlet side casing 81 and the outlet side casing 82 of the water level adjusting unit 8, and this height is adjusted. Thus, the level of the liquid level in the oil / water separation tank 2 is optimally adjusted. A lid 84 that can be opened and closed by a hinge is provided on the upper side of the outlet casing 82, and the height of the slide plate 83 can be adjusted by opening the lid 84. The slide plate 83 can be loosened or fixed with a screw or the like.

FIG. 6 shows an automatic cleaning device 13 for the drainage port 8c portion of the present embodiment.
The setting of the level of the liquid level in the oil / water separation tank 2 is delicate, and if it is high, moisture is discharged together with the oil, and if it is low, the oil is not discharged. Here, even if the height of the drainage port 8c is adjusted appropriately at the beginning, dirt (scum) contained in the wastewater flowing in the water level adjustment pipe 8a adheres to the inner wall of the water level adjustment pipe 8a and the vicinity of the drainage port 8c. . In particular, scum tends to adhere when the operation of the apparatus is stopped. When scum adheres to the vicinity of the drain port 8c, the liquid level in the oil / water separation tank 2 fluctuates to a higher level, and the water contained in the liquid overflowing from the oil overflow port 10 increases. If it does so, the collection | recovery efficiency of oil will fall. Therefore, by operating the automatic cleaning device 13 after the operation of the apparatus is stopped and cleaning the drain outlet 8c of the water level adjusting pipe 8a, the drain outlet 8c is not always contaminated or deposited. Ensure that the surface level is maintained properly.

  Specifically, in the automatic cleaning device 13, a cleaning pipe 131 is continuously provided on the upper part of the inlet casing of the water level adjustment unit 8 so as to have the same axis as the water level adjustment pipe 8 a, and the cleaning pipe 131 is provided in the cleaning pipe 131. The cleaning brush 132 is retracted to the upper part during normal operation and moves up and down to the drain outlet 8c and the water level adjusting pipe 8a side during cleaning. A rack 134 is joined to the upper portion of the shaft 133 of the cleaning brush 132 so that the cleaning brush 132 can be moved up and down and reciprocated up and down by a lift motor 135 and a limit switch 136 for stopping and positioning the cleaning brush 132. It has become. The cleaning brush 132 cleans the drainage port 8c by reciprocating up and down in the vicinity of the drainage port 8c, but the drainage port 8c is rotated by rotating the cleaning brush 132 in a lowered state. It is also possible to perform cleaning.

  In the upper part of the oil / water separation tank 2, a floating oil scraping device 11 for scraping the upper oil layer to the oil overflow port 10 is provided. By operating this floating oil scraping device 11, highly viscous oil is discharged. Scrap out. If the oil is vegetable oil, the viscosity is relatively low, but animal oil is highly viscous and does not naturally flow out of the overflow. Therefore, the floating oil scraping device 11 is used. Still, since the oil will harden in the winter, it is heated to about 40 ° C. with the heater 12 so that it does not harden, and the fluidity is increased and scraped out.

  As shown in FIG. 7, the floating oil scraping device 11 includes a comb-shaped scraping plate 111, a driving motor 112, a gear head 113 that decelerates the rotation of the driving motor 112, an output shaft of the gear head 113, and a scraping plate 111. And a bearing 114 for supporting the rotation shaft of the scraping plate 111 on the mounting frame 116. Comb-like irregularities are formed in the lower part of the scraping plate 111, and as shown in FIG. 8B, both ends are formed with bent portions 111a in a direction that is delayed with respect to the rotation direction.

  Thus, the scraping plate 111 is provided with comb-like irregularities, and the oil layer is broken by rotating the scraping plate 111. The oil layer is broken by the bent portion 111a and discharged from the oil overflow port 10 to the oil recovery chute 15. Is done.

Next, the oil / water separation / recovery process by the oil / water separation / recovery device 1 according to the present embodiment will be described.
The floating oil from the skimmer unit 4 sent through the inflow pipe 6 by the pump 5 is discharged from a discharge port 6 a provided upward in the center of the oil / water separation tank 2. The reason why the sewage containing oil is supplied upward is to prevent the sludge precipitated at the bottom of the oil / water separation tank 2 from being rolled up. The sewage containing oil supplied upward in the oil / water separation tank 2 is guided to the upper part of the center of the oil / water separation tank 2 by the lower surface of the top opening shade-shaped inclined rack 7, and the oil is separated by the difference in specific gravity between the oil and water. Moisture and sludge float on the liquid surface and are received on the upper surface of the inclined rack 7 by the convection flow from the center to the outer periphery inside the oil / water separation tank 2. Sludge having a relatively large specific gravity falls on the slope of the upper surface of the inclined rack 7 and settles at the bottom of the oil / water separation tank 2. In this embodiment, the inclined rack 7 is provided in two stages, and slows the speed at which sludge accumulates at the bottom of the oil / water separation tank 2.

The water separated due to the difference in specific gravity in the oil / water separation tank 2 communicates with the water level adjustment pipe 8a through the water supply port 8b of the water level adjustment pipe 8a coupled to the lower part of the oil / water separation tank 2, and the upper part of the water level adjustment pipe 8a. When the level of the drainage port 8c is exceeded, the water is discharged from the drainage port 8c to the drainage pipe 9 side. The water level of the drain outlet 8c is optimally adjusted by the water level adjusting unit 8 described above.
On the other hand, the oil component separated and floated in the oil / water separation tank 2 due to the specific gravity difference is scraped by the scraping plate 111 of the floating oil scraping device 11 and discharged from the oil overflow port 10 to the oil recovery chute 15 for recovery (not shown). It can be stored in the tank. If the temperature is low, such as in winter, the oil will harden and the scraping by the floating oil scraping device 11 will not be successful, so the heater 12 is used to keep the temperature in the oil / water separation tank 2 at an appropriate temperature.
The oil recovered from the oil recovery chute 15 can be recycled and reused as fuel or the like. Wastewater from which oil has been removed is drained into sewage.

When the operation of the oil / water separation / recovery device 1 is stopped, scum adheres to the vicinity of the water level adjusting pipe 8a and the discharge port 8c, and the level of the discharge port 8c rises during the next operation, making it impossible to recover the oil content as set. Therefore, after the operation, the automatic cleaning device 13 is operated, and the inner wall of the upper part of the water level adjusting pipe 8a and the vicinity of the discharge port 8c are cleaned by the rotating brush 132 to prevent the scum from adhering. Allow separation.
After two to three months, since sludge accumulates at the bottom of the oil / water separation tank 2, the sludge valve 14 is opened to discharge the sludge. The two-stage inclined rack 7 is taken out and cleaned.

In the above embodiment, an example in which the rotating scraping plate 111 is used as the floating oil scraping device 11 has been described. However, when the animal oil having a high viscosity or the processing amount increases, It may be difficult to discharge. Therefore, the floating oil scraping device 11 using the rotary scraping plate 111 is mainly made of vegetable oil and has a treatment amount of 1000 to 2000 L / h. When the viscosity of animal oil is high or the treatment amount is 3000 L / h or more. In many cases, as shown in FIGS. 9 and 10, a horizontally movable floating oil scraping device 11 </ b> A can be used.
FIGS. 9A and 9B show the configuration of a horizontally-moving floating oil scraping device according to another embodiment of the present invention, where FIG. 9A is a front view, FIG. 9B is a bottom view, and FIG. 9C is a side view. FIG. 10 shows the structure of a scraping plate according to another embodiment of the present invention, in which (a) is a front view and (b) is a plan view. This horizontally moving floating oil scraping device 11A includes an attachment frame 118 attached to the upper part of the oil / water separation tank 2, and a rodless cylinder 119 installed on the attachment frame 118. The rodless cylinder 119 has a shaft holder 117b. A scraper plate 117 having a triangular wave blade at the lower portion is attached to the lower portion of the shaft 117a fixed by the shaft holder 117c. By driving the rodless cylinder 119, the scraping plate 117 can be moved horizontally to the oil recovery chute 15 side and scraped out. As a power source of the rodless cylinder 119, an air source of a compressor can be used.

  The present invention is a food factory, restaurant as an oil / water separation and recovery device that can effectively recover floating oil in a grease trap in which kitchen wastewater containing miscellaneous solids such as food waste is collected and purify the wastewater. It can utilize suitably for wastewater treatment, such as.

It is sectional drawing which shows the whole structure of the oil-water separation-and-recovery apparatus which concerns on embodiment of this invention. It is the top view and side view of an oil-water separation and recovery device concerning an embodiment of the invention. The structure of the inclination rack which concerns on this Embodiment is shown, (a) is a top view, (b) is a side view. The structure of the skimmer unit which concerns on this Embodiment is shown, (a) is a front view, (b) is a top view. The water level adjustment unit which concerns on this Embodiment is shown, (a) is a side view of the state which attached the automatic cleaning apparatus, (b) is a front view of the state which removed the automatic cleaning apparatus, (c) is the plane. FIG. It is a front view of the automatic cleaning apparatus which concerns on this Embodiment, (a) is a standby state, (b) is a fragmentary sectional view of a cleaning state. It is a front view which shows the floating oil scraping apparatus which concerns on this Embodiment. The structure of the scraping board in the floating oil scraping apparatus which concerns on this Embodiment is shown, (a) Front view, (b) is a top view. The structure of the floating oil scraping apparatus in other embodiment of this invention is shown, (a) is a front view, (b) is a bottom view, (c) is a side view. The structure of the scraping board in other embodiment of this invention is shown, (a) is a front view, (b) is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil-water separation collection apparatus 2 Oil-water separation tank 3 Grease strap 4 Skimmer unit 41 Main body 42 Movable cylinder part 43 Suction ring 44 Float 45 Screw socket 5 Pump 51 Screwed cheese 52 Check valve 6 Inflow pipe 6a Outlet 7 Inclined rack 7a Hole 7b Handle 8 Water level adjusting unit 8a Water level adjusting pipe 8b Water supply port 8c Drain port 81 Inlet casing 82 Outlet casing 83 Slide plate 84 Lid 9 Drain pipe 10 Oil overflow port 11 Floating oil scraping device 111 Scraping plate 111a Bending portion 112 Drive motor 113 Gear head 114 Coupling 115 Bearing 116 Mounting frame 11A Floating oil scraping device 117 Scraping plate 117a Shaft 117b Shaft holder 117c Shaft holder 118 Mounting frame 119 Rodless cylinder 12 Heater 13 Automatic cleaning device 131 Cleaning pipe 132 Cleaning brush 133 Shaft 134 Rack 135 Lifting motor 136 Limit switch 14 Sludge valve 15 Oil recovery chute 16 Post

Claims (4)

An oil-water separation tank;
A skimmer unit that sucks floating oil in the grease strap,
An inflow pipe that supplies the floating oil sucked in by the skimmer unit upward to a central portion in the oil-water separation tank through a pump;
An at least two-stage top opening shade-shaped inclined rack detachably installed above the outlet of the inflow pipe in the oil / water separation tank;
A water level adjusting device having a water outlet for a water level adjusting pipe connected to a position above the bottom of the oil / water separation tank and having a drain outlet whose height is adjustable at a position lower than the top of the oil / water separation tank;
A drainage pipe connected to the vicinity of the drainage port of the water level adjustment pipe;
An oil overflow port provided at the top of the oil-water separation tank;
A floating oil scraping device provided at an upper portion of the oil-water separation tank;
A heater provided inside the oil-water separation tank;
An automatic cleaning device for cleaning the drain outlet of the water level adjustment pipe;
An oil-water separation and recovery device comprising a sludge valve for discharging sludge provided at the bottom of the oil-water separation tank.   The oil / water separation and recovery device according to claim 1, wherein the floating oil scraping device is configured to rotate a comb-shaped scraping plate to scrape floating oil to the oil overflow port.   3. The oil water according to claim 1, wherein the automatic cleaning device is a cleaning brush that is normally retracted to an upper portion of a drain outlet portion of the water level adjusting pipe and that moves up and down to the drain outlet portion during cleaning. Separation and recovery device.   The oil-water separation and recovery device according to any one of claims 1 to 3, wherein the pump is a diaphragm pump.

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