Floor-mounted grease interceptor

Abstract

To provide a floor-mounted grease interceptor that improves the recovery rate of grease and oils during cleaning.SOLUTION: A floor-mounted grease interceptor is equipped with at least one flat blade on a rotating shaft that spans the width of a separation chamber. When the rotating shaft is rotated during cleaning, the blade pushes out the accumulated grease and oils in a direction perpendicular to the rotating shaft, and the grease and oils go over an overflow plate that is at the height of the standard water level provided in the separation chamber, and is discharged outside the storage tank body through an oil discharge hole.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grease interceptor that separates and collects kitchen waste, oils, and fats contained in wastewater before they flow into a sewer. [Background technology]

[0002] As shown in FIG. 5, a grease interceptor 100 that is installed on the floor under a sink is disclosed. Ideally, the grease interceptor 100 should be buried in the space under the floor, midway between the drain pipe to the street gutter and the sewer. However, in restaurants and other establishments located on the second or higher floor of a building, installation on the floor is required in consideration of the impact on the floors below, or in small stores that do not have the space to bury the grease interceptor under the floor, installation under the sink may be necessary. Hereinafter, a grease interceptor that is not buried under the floor but is installed on the kitchen floor will be referred to as a floor-standing type. A floor-standing grease interceptor does not necessarily have to be placed directly on the floor, but may also be placed on a stand under the sink, as shown in FIG. 7.

[0003] In recent years, there has been an increase in food trucks equipped with cooking facilities setting up shop in urban areas, such as office districts, campuses, and parks. Food trucks are equipped with tanks to store wastewater, and there is growing demand for floor-mounted grease interceptors that can remove kitchen waste and grease before the wastewater is poured into the tank.

[0004] Whether buried or floor-mounted, grease interceptors are generally based on the natural flotation method, which takes advantage of the difference in specific gravity between water and oil, to separate grease from wastewater. In natural flotation methods, the slower the flow rate of the wastewater in the storage tank, the larger the separation tank, and the longer the distance from upstream to downstream, the more likely the grease will float. However, as mentioned above, floor-mounted grease interceptors are installed in places with limited space, so naturally there is a limit to the size of the storage tank.

[0005] In addition, with the natural flotation separation method, it is recommended that the oils and fats that float in the separation tank be removed by regular cleaning at least once a week.If cleaning is neglected, the amount of oils and fats that float in the separation tank will increase cumulatively, and even the oils and fats that have been separated and floated may be carried away by the wastewater and flow into the sewer pipes.

[0006] Therefore, Non-Patent Document 1 discloses a floor-standing grease interceptor 100 that is easy to maintain even in a small space. As shown in Fig. 4, a storage tank body 101 has an inlet 102 to which a drain pipe extending from a sink outlet is connected, and directly below the inlet 102, an inlet chamber 104 that houses a basket 103 that collects garbage such as leftover food and vegetable scraps, a separation chamber 105 into which wastewater containing oils and grease flows after the garbage has been removed, and an outlet chamber 106 into which the wastewater that has been separated into oil and water in the separation chamber 105 and from which the oils and grease have been removed flows.

[0007] The outflow chamber 106 is provided with an outflow port 107 for discharging wastewater into the sewer, with a drain trap 108 connected to the inside of the outflow chamber and a drainage pipe connected to the outside of the outflow chamber for discharging wastewater into the sewer. Partition walls 110, 111 are provided to separate the inflow chamber 104 and the separation chamber 105 of the storage tank main body 101, and the separation chamber 105 and the outflow chamber 106, and flange guides 110', 111' are provided at the upper ends of the partition walls 110, 111. A collection section 113', which is T-shaped in plan view and has a collection rod 113 attached to it, and which collects oils and fats that have risen to the water surface in the separation chamber 105, is moved back and forth in the left and right directions of the storage tank main body 101 along these guides 110', 111' to collect the oils and fats in the oil collection section 114 of the separation tank. An overflow plate 115 having a V-shaped cross section is provided in front of the oil collection section 114, and the oils and fats flow over the overflow plate 115 and are collected in the oil collection section 114. An oil discharge hole 116 is provided on the right side of the separation tank where the oil collection section 114 is located, and a valve 117 is opened to discharge the oils and fats from the storage tank main body 101.

[0008] However, as shown in Figure 4(b), the oil collection rod 114, which is U-shaped in cross section, is moved back and forth across the entire left and right width of the storage tank main body 101. After collecting the grease into the oil collection section 114, when the collection section 113' is pushed back to the side without the oil discharge hole, the collected grease spreads again, resulting in an oil recovery rate of only about 60% during cleaning. Furthermore, to increase the interception efficiency, it is desirable to ensure a large separation chamber, but in the floor-standing grease interceptor disclosed in Non-Patent Document 1, if the separation chamber is made large, the storage tank main body 101 itself must be large, which is difficult to achieve with floor-standing types that are often used in kitchens with limited space.

[0009] Therefore, in the floor-mounted grease interceptor 200 disclosed in Patent Document 2, the inlet chamber 204, separation chamber 205, and outlet chamber 206 are arranged as shown in Figure 6. That is, the inlet 202 and outlet 207 are attached to the same front side, making it possible to enlarge the separation chamber 205, thereby improving the interception efficiency.

[0010] However, because the mechanism for recovering grease and oil is the same as that in Non-Patent Document 1, the grease and oil will spread if it is reversed in the recovery direction, and the recovery rate of grease and oil that can be recovered by cleaning remains low.

[0011] [Non-Patent Document 1] "Grease Trap General Catalog", Hokos Co., Ltd., October 1997, Catalog No.: 4059.9710A, pp. 58-59 [Non-patent document 2] "Hokos General Catalog: Water Supply and Drainage Equipment," Hokos Corporation, January 2023, Catalog Number: 4293S.2301T, P.106-107 Summary of the Invention [Problem to be solved by the invention]

[0012] In view of the above-mentioned problems, an object of the present invention is to provide a floor-standing grease interceptor that improves the recovery rate of grease and oils during cleaning. [Means for solving the problem]

[0013] The floor-standing grease interceptor of the present invention comprises a storage tank body, which has an inlet for drainage water to flow into, a basket for receiving the drainage water flowing in from the inlet, a separation chamber for floating and separating grease and oil by utilizing the difference in specific gravity between water and oil, an outlet for discharging the drainage water into a sewer pipe, and a drain trap connected to the outlet for preventing odors and insects from entering from downstream of the outlet. The separation chamber is provided with a recovery mechanism for recovering grease and oil. This recovery mechanism has a rotating shaft that is installed across the entire width of the storage tank body at a position higher than the standard water level, and a blade attached to the rotating shaft, and one end of the rotating shaft is rotatably supported on either the left or right side of the storage tank body. A rotating handle is connected to the rotating shaft, and the other end of the rotating shaft is rotatably fixed to the other side of the storage tank body. The rotating shaft is provided with at least one blade that extends across the left and right width of the separation chamber. When the rotating handle is rotated during cleaning, the blade pushes out the accumulated oil and grease layer in a direction perpendicular to the rotating shaft. The separation chamber is provided with an overflow plate that extends across the entire left and right width of the storage tank body, and the overflow plate has an upper end that is at the height of the standard water level surface and a lower end that is located at a position higher than the bottom surface of the storage tank body. The oil and grease pushed out onto the blade passes over the overflow plate and is discharged to the outside of the storage tank body through an oil discharge hole provided in the overflow section of the separation chamber.

[0014] The blades, which are a mechanism for recovering the oil layer, are rotated toward the recovery section, and when the oil passes over the overflow plate, the blades move away from the water surface, allowing the oil to be reliably recovered in the recovery section without being agitated.

[0015] In addition, the blades of the floor-mounted grease interceptor of the present invention are flat plates with a bent portion at the tip, and are characterized in that the bent portion is positioned so that it is immersed in and pushes out the grease layer in the separation chamber while the rotating shaft is rotating.

[0016] By providing the bent portion, the oil layer can be efficiently pushed out toward the overflow plate and allowed to overflow.

[0017] Furthermore, when the bent portion is immersed in the oil layer, the peak of the bent portion is positioned on the overflow plate side, and the rotating shaft is rotated in a direction that pushes the oil layer from in front of the overflow plate toward the overflow plate, causing it to go over the upper end of the overflow plate.

[0018] The peaks are on the overflow side, and when they come above the water surface, the oil on the bends slowly descends to the water surface, making it difficult for the oil to be stirred.

[0019] The blades are characterized in that two or more blades are provided around the rotation axis.

[0020] As a result, when one blade pushes out the oil layer and leaves the water surface, the next blade is submerged in the water surface to push out the oil layer, so the oil layer can be efficiently pushed out toward the overflow plate without stirring the oil.

[0021] In addition, the floor-mounted grease interceptor of the present invention is characterized in that the inlet chamber in which the basket is installed and the outlet chamber in which the drain trap is installed are adjacent to each other, and a first partition is provided between the inlet and outlet chambers to block the flow of wastewater, the separation chamber is adjacent to both the inlet and outlet chambers, a second partition is provided between the inlet and separation chambers, the second partition has a first communication portion below the storage tank body so that wastewater flows from the inlet chamber into the separation chamber, a third partition is provided between the outlet chamber and the separation chamber, and the third partition has a second communication portion below the storage tank body so that wastewater flows from the separation chamber into the outflow chamber, and a fourth partition is provided between the second and third partitions and perpendicular to the second and third partitions, extending into the separation chamber, and the fourth partition is provided from the bottom surface of the storage tank body to a position lower than the standard water level surface of the storage tank body.

[0022] Furthermore, during oil-water separation, wastewater flows from the inlet chamber to the separation chamber within the storage tank body, and from the separation chamber to the outlet chamber, being guided in a U-shape when viewed from above.

[0023] This configuration makes it possible to realize a grease interceptor that not only has a high oil recovery rate during cleaning, but also has a high interception efficiency. [Brief explanation of the drawings]

[0024] [Figure 1] 1A is a plan view of a floor-mounted grease interceptor according to the present invention; FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A; FIG. 1C is a cross-sectional view taken along line BB of FIG. 1A; and FIG. 1D is a rotating shaft with blades. [Figure 2] This is an illustration of oils and greases flowing over an overflow plate. (a) The oils and greases are riding on the bent part and about to flow over the overflow plate. (b) The bent part exceeds the height of the overflow plate, causing the oils to overflow. [Figure 3] 1A and 1B are diagrams showing a rotary shaft and blade plates according to the present invention, in which (a) is a diagram showing one blade, (b) is a cross-sectional view of three blades, and (c) is a cross-sectional view of four blades. [Figure 4] 1A and 1B are diagrams showing a floor-mounted grease interceptor according to Non-Patent Document 1, in which (a) is a plan view, (b) is a cross-sectional view taken along line AA in (a), and (c) is a cross-sectional view taken along line BB in (a). [Figure 5] FIG. 1 is a diagram showing a floor-standing grease interceptor according to Non-Patent Document 1 installed on the floor under a sink. [Figure 6] FIG. 1 is a plan view showing a floor-standing grease interceptor according to Non-Patent Document 2. [Figure 7] FIG. 1 is a diagram showing a floor-standing grease interceptor according to Non-Patent Document 2 placed on a stand provided under a sink. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals. For convenience of explanation, as shown in FIG. 1(a), the symbols indicating front, back, left, and right directions are "a" for front, "b" for back, "c" for left, and "d" for right, and the symbols indicating up and down directions are "e" for top and "f" for bottom. Left and right are defined as left and right when viewed from the front. Front, back, left, and right are terms of convenience and do not indicate absolute directions.

[0026] 1 is a diagram showing a floor-mounted grease interceptor 10 according to the present invention. The storage tank body 1 has a front side 1a, a rear side 1b, a left side 1c, a right side 1d, and a bottom 1f, and is a rectangular box-like structure with an open top. The front side 1a is provided with an inlet 2 for receiving wastewater from the sink and an outlet 7 for discharging the wastewater, from which dust and oils have been removed, into the sewer, arranged side by side in the left-right direction.

[0027] A basket 3 for collecting debris contained in the wastewater is provided directly below the inlet 2, and a drain trap 8 for preventing odors and insects from entering from the sewer side is fixed to the outlet 7. As shown in Figure 1(c), the height of the lower end 7' of the outlet 7 is the standard water level WL of the storage tank body 1.

[0028] The storage tank body 1 is divided into three compartments (three tanks): an inlet chamber 4 in which a basket 3 is installed to remove dust contained in the wastewater; a separation chamber 5 in which the wastewater that has had the dust removed but still contains oils and fats is separated into oil and water using a natural flotation separation method; and an outlet chamber 6 in which the wastewater from which the oils and fats have been removed is discharged into the sewer.

[0029] Wastewater flowing in from the inlet 2 passes from the inlet chamber to the separation chamber, and from the separation chamber to the outlet chamber, before flowing out to the sewer side from the outlet 7. We will now explain the partitions that are provided to separate these three chambers and guide the wastewater in the above-mentioned flow.

[0030] As shown in FIG. 1(a), the inlet chamber 4 and the outlet chamber 6 are provided adjacent to each other on the front side surface 1a of the storage tank main body 1. A first partition wall 9 is provided between the inlet chamber 4 and the outlet chamber 6, perpendicular to the front side surface 1a. The upper end 9e of the first partition wall 9 is provided so as to be higher than the lower end of the inlet 2, and is provided at a height such that wastewater flowing from the inlet 2 into the inlet chamber 4 does not splash into the outlet chamber 6. In addition, the lower end 9f of the first partition wall 9 is provided so as to be in contact with the bottom surface 1f of the storage tank main body 1, blocking the flow of wastewater between the inlet chamber 4 and the outlet chamber 7.

[0031] A second partition wall 11 is provided between the inflow chamber 4 and the separation chamber 5. The second partition wall 11 is provided parallel to the front side surface 1a of the storage tank body 1, at a position approximately one-third of the way in the front-to-rear direction of the storage tank body 1. The upper end of the second partition wall 11 is provided at the same height as the upper end 9e of the first partition wall 9, but a first communication part 12 is provided at the lower end 11f, as shown in FIG. 1(b). The first communication part 12 allows wastewater to flow from the inflow chamber 4 into the separation chamber 5.

[0032] Next, a third partition wall 13 is provided between the separation chamber 5 and the outflow chamber 6. Like the second partition wall 11, the third partition wall 13 is also provided parallel to the front side surface 1a of the storage tank body 1, at a position approximately one-third of the way in the front-to-rear direction of the storage tank body 1. The upper end of the third partition wall 13 is provided at the same height as the upper end 9e of the first partition wall 9, but a second communication part 14 is provided at the lower end 13f, as shown in FIG. 1(b). The second communication part 14 allows wastewater to flow from the separation chamber 5 into the outflow chamber 6.

[0033] The third partition 13 is designed to minimize the amount of oils and fats that have risen to the surface and accumulated in the separation chamber 5 being pulled along with the wastewater and flowing out of the outlet into the sewer side, even if a siphoning phenomenon occurs on the sewer side of the outlet 7, and the second communication part 14 is located at a lower position than the inlet of the drain trap 8.

[0034] A fourth partition 15 is provided in the separation chamber 5 so as to be perpendicular to the second partition 11 and the third partition 13. This fourth partition 15 prevents residue that has slipped through the basket 3 from entering the outflow chamber 6 via the second communication portion 14 when wastewater flows from the inlet chamber 4 into the separation chamber 5, and has an upper end 15e located lower than the standard water level WL, and a lower end 15f grounded to the bottom surface 1f. As shown in FIG. 1(c), the fourth partition 15 extends from the second partition 11 and the third partition 13 toward the rear side surface 1b, but to a position where it does not interfere with a recovery mechanism 16 that recovers oils and greases, which will be described later.

[0035] 1(a) and 1(b), the second partition wall 11 and the third partition wall 13 are arranged on a straight line and are formed as a single member, but they may be separate members. As shown in FIG. 1(a), the fourth partition wall 15 is specifically arranged perpendicular to the second partition wall 11, and the first partition wall 9 and the fourth partition wall 15 are arranged not on a straight line, but the first partition wall 9 and the fourth partition wall 15 may be arranged on a straight line.

[0036] In addition, the inflow chamber 4 and the outflow chamber 6 have approximately the same size in plan view, but the outflow chamber 6 can also be made smaller. In any case, in this embodiment, the separation chamber 5 is arranged to occupy approximately two-thirds of the surface area of ​​the entire storage tank body 1, but this is not necessarily limited to this, and it can be larger or smaller than this.

[0037] Furthermore, although both the inlet 2 and the outlet 7 are provided on the front side surface 1a, the inlet 2 may be provided on the right side surface 1d, for example, or the outlet 7 may be provided on the left side surface 1c.

[0038] As described above, the wastewater is guided to flow in a U-shape when viewed from above, as shown in Figure 1(a), and by arranging the separation tank 5 so that it occupies more than half of the surface area of ​​the storage tank main body 1, even if the capacity of the storage tank main body 1 of a floor-mounted grease interceptor that is installed in a limited space is small, a high interception efficiency can be achieved by making the separation tank 5 large.

[0039] Next, we will explain the grease recovery mechanism 16 of the floor-mounted grease interceptor according to the present invention. The recovery mechanism 16 has vanes 18 provided around a rotation shaft 17 that rotate around the rotation shaft, thereby collecting grease and oils accumulated on the standard water level WL toward the rear side 1b of the storage tank main body 1.

[0040] Incidentally, for the sake of convenience, Figure 1 shows the blades 18 in a vertical position, but during normal operation, when oil-water separation is taking place in the separation tank 5, the blades 18 are maintained in a horizontal position above the standard water level so that the blades 18 are not submerged in the wastewater.

[0041] Depending on the usage conditions, a floor-standing grease interceptor with a relatively small capacity will not be able to achieve the interception efficiency guaranteed by the manufacturer, no matter how high the interception efficiency of the grease interceptor, unless it properly collects the grease that has floated up and accumulated in the separation chamber 5. The collection mechanism 16 in the floor-standing grease interceptor of the present invention is designed to maintain the inherent high interception efficiency of the grease interceptor by making it possible to easily collect grease without opening the lid (not shown) of the storage tank main body 1.

[0042] The recovery mechanism 16 will now be described in detail. The rotation shaft 17 is located approximately in the center of the separation chamber 5 in the front-to-rear direction, at a position higher than the standard water level, and across the entire width of the storage tank main body 1. Through holes are provided in the left side surface 1c and the right side surface 1d of the storage tank main body 1, and grommets 19c, 19d, which are waterproof support members, are fitted into them.

[0043] A grommet 19c fitted into the left side surface 1c rotatably and liquid-tightly supports a left end portion 17c of the rotary shaft 17. A grommet 19d fitted into the other right side surface 1d rotatably and liquid-tightly supports a rotary handle 20 from the outside of the right side surface 1d. The rotary handle 20 is threaded onto a screw 17d provided on the right end of the rotary shaft 17, so that when the rotary handle 20 is rotated, the rotary shaft 17 rotates.

[0044] As shown in FIG. 1, the blades 18 attached to the rotating shaft 17 are flat plates that extend across the width of the storage tank body 1, with their tips bent. In this embodiment, two blades 18 are provided on the same spatial plane, sandwiching the rotating shaft 17. The bent convex portions of the blades 18 are referred to as peak portions 18g. As shown in FIG. 1(d), the bending angle θ is 135°. The portion from the peak portion 18g toward the rotating shaft 17 is called a flat portion 18h, and the portion from the peak portion 18g toward the tip is called a tip flat portion 18j. The flat portion 18h and the tip flat portion 18j together form a bent portion 21. The bent portion 21 pushes the oils and greases toward the rear side surface 1b.

[0045] An overflow plate 22 is provided on the rear side 1b of the separation tank 5, spanning the entire width of the storage tank body 1. The space from the overflow plate 22 to the rear side 1b is an oil collection section 23. An upper end 22e of the overflow plate 22 is provided at the height of the standard water level surface WL, and a lower end 22f is provided at a position higher than the bottom surface 1f. The overflow plate 22 is provided in a position where it will not be interfered with by the vane plates 18.

[0046] As shown in Figure 1(c), when the bent portion 21 is immersed in the oil layer OL accumulated on the standard water level WL, the ridge portion 18g is placed with the convex portion facing the overflow plate 22. Then, by rotating the rotary handle 21 provided on the right side surface 1d counterclockwise, the bent portion 21 pushes the oil layer OL toward the overflow plate 22.

[0047] 2A and 2B are conceptual diagrams illustrating how oils and greases flow over the overflow plate 22 due to the bent portion 21. Fig. 2A shows that the oils and greases are lifted from the peak portion 18g of the bent portion 21, which is immersed in the oil layer OL, onto the flat tip portion 18j and are about to go over the upper end portion 22e of the overflow plate 22.

[0048] In Figure 2(b), the tip flat plate portion 18j and the upper end portion 22e of the overflow plate 22 do not interfere with each other, but viscous oils and greases combine with the oils and greases that have risen from the tip flat plate portion 18j to the oil collection portion 23 beyond the upper end portion 22e of the overflow plate 22 and accumulate.

[0049] An oil drain hole 24 is provided on the rear side surface 1b so that its center is positioned at the height of the standard water level, and a lower end 24' of the oil drain hole 24 is located at a position lower than the upper end 22e of the overflow plate 22. An oil drain pipe 26 having an opening / closing valve 25 on the outside of the storage tank main body 1 is connected to the oil drain hole 24. During cleaning, when this opening / closing valve is raised and oils and greases and wastewater are discharged from the oil drain pipe 26, the water level inside the storage tank main body 1 drops to the lower end 24' of the oil drain hole 24.

[0050] Therefore, when the rotary handle 20 is rotated, as described above, the oils and fats in the separation tank 5 are collected in the oil collection section 23, and even if the water level in the oil collection section 23 rises, the oils and fats are discharged outside the storage tank main body 1 through the oil discharge hole 24, so the oils and fats collected in the oil collection section 23 do not flow back.

[0051] When the bent portion 21, which has pushed the oils and fats over the overflow plate 22 and into the oil collection section 23, leaves the water surface, the bent portion 21 of the other blade 18 similarly immerses in the oil layer OL that has accumulated on the standard water level WL, and pushes the oils and fats towards the overflow plate 22. Because the oils and fats are pushed out only in the same direction, they are not easily agitated, and by simply rotating the rotary handle in the correct direction a few times, more than 90% of the oils and fats that have floated to the separation tank 5 can be recovered.

[0052] In this embodiment, it is described as "filling the entire left and right width of the storage tank body 1," but these terms "left" and "right" are used for explanatory purposes and are not absolute and are synonymous with the opposing sides of the storage tank body 1 (the same applies in the claims). Also, it has been described that the rotary handle 20 on the right side 1d is rotated counterclockwise, but here too, "left" and "right" are used merely for convenience of explanation and are relative terms, and are not limited to this. The essence of this is that the rotary handle is rotated in a direction that pushes the bent portion 21 toward the overflow plate 22 with the peak portion 18g of the blade plate 18 used for oils and fats facing the overflow plate 22.

[0053] Furthermore, the number of blades 18 of the rotation mechanism 16 is not limited to two, and may be one on one side of the rotation shaft 17 as shown in Fig. 3(a), three as shown in Fig. 3(b), or four as shown in Fig. 3(c). When there are multiple blades 18, it is desirable that there is only one bent portion 21 pushing out the oils and fats. When the bent portion 21 leaves the water surface, it is desirable that the bent portion 21 of the next blade 18 is immersed in the oil layer OL and pushes out the oils and fats. This is to minimize agitation of the oils and fats.

[0054] Furthermore, when the bent portion 21 is immersed in the oil layer OL, it is immersed slowly from the peak portion 18g, so the oil is not easily stirred and the particles are not easily sheared. It is also desirable to rotate the rotary handle 20 at a speed of 60 rpm or less. This is because a speed that is not too fast and that is sufficient to efficiently collect the oil is required.

[0055] The above-described shape of the blade is merely an example and is not necessarily limited thereto. For example, the angle θ of the bending of the peaks does not need to be 135°, and may have a gentle curve. Furthermore, the blades may be arranged parallel to each other, although not on the same spatial plane across the rotation axis. In such a case, the blades may be flat plates without any bent portions. [Explanation of symbols]

[0056] 1, 101, 201 Reservoir body 2, 102, 202 inlet 3, 103, 203 Basket 4, 104, 204 Inflow chamber 5, 105, 205 Separation room 6, 106, 206 Outflow chamber 7, 107, 207 Outlet 8, 108, 208 Drain trap 9 First bulkhead 10, 100, 200 Floor-standing Grease Interceptor 11 Second bulkhead 12 First communication section 13 Third bulkhead 14 Second communication part 15 Fourth Bulkhead 16. Recovery Mechanism 17 Rotation axis 18 Slats 18g mountain part 18h Flat plate part 18j Flat plate at the tip 19 Grommet (waterproof support member) 20 Rotating Handle 21 Bending part 22 Overflow plate 23 Oil collecting section 24 Oil drain hole 25 Opening and closing valve 26 Oil drain pipe WL standard water level OL oil layer

Claims

1. A storage tank body; In a floor-standing grease interceptor, the storage tank body has an inlet through which wastewater flows, a basket that receives the wastewater flowing in from the inlet, a separation chamber that uses the difference in specific gravity between water and oil to float and separate oil and grease, an outlet that discharges the wastewater into a sewer pipe, and a drain trap that is connected to the outlet and prevents odors and insects from entering from downstream of the outlet, The separation chamber is provided with a recovery mechanism for recovering oils and fats, The recovery mechanism includes a rotating shaft that is provided across the entire width of the storage tank body at a position higher than a standard water level, and a blade that is attached to the rotating shaft; One end of the rotating shaft is rotatably supported on one of the left and right side surfaces of the storage tank body and a rotating handle is connected to it, and the other end of the rotating shaft is rotatably fixed to the other side surface of the storage tank body, The blade is a flat plate extending across the left and right width of the separation chamber, and at least one blade is provided. When the rotary handle is rotated during cleaning, the blade pushes out oils and greases accumulated on the standard water level surface in a direction perpendicular to the rotation axis. An overflow plate is provided in the separation chamber across the entire width of the storage tank body, and the overflow plate has an upper end at the height of the standard water level surface and a lower end at a position higher than the bottom surface of the storage tank body, A floor-mounted grease interceptor characterized in that the oil and grease pushed out onto the blades passes over the overflow plate and is discharged to the outside of the storage tank body through an oil discharge hole provided in the overflow section of the separation chamber.

2. A floor-mounted grease interceptor characterized in that a bent portion is provided at the tip of the blade, and the bent portion is positioned so that it is immersed in and pushes out the oil and grease layer in the separation chamber during rotation of the rotating shaft.

3. A floor-mounted grease interceptor as described in claim 2, characterized in that when the bent portion is immersed in the grease layer, the peak of the bent portion is positioned on the overflow plate side, and the rotating shaft is rotated in a direction that pushes the grease layer from in front of the overflow plate toward the overflow plate, causing the grease layer to climb over the upper end of the overflow plate.

4. 3. The floor-mounted grease interceptor according to claim 2, wherein two or more of the blades are provided around the rotation shaft.

5. The inlet chamber in which the basket is installed and the outlet chamber in which the drain trap is installed are adjacent to each other, and a first partition wall is provided between the inlet chamber and the outlet chamber to block the flow of drainage water; The separation chamber is adjacent to both the inlet chamber and the outlet chamber, a second partition wall is provided between the inflow chamber and the separation chamber, and the second partition wall has a first communication portion below the storage tank body so that wastewater flows from the inflow chamber into the separation chamber; a third partition wall is provided between the outflow chamber and the separation chamber, and the third partition wall has a second communication portion below the storage tank body so that wastewater flows from the separation chamber into the outflow chamber; A floor-mounted grease interceptor as described in claim 1, characterized in that a fourth partition wall perpendicular to the second partition wall and the third partition wall extends into the separation chamber between the second partition wall and the third partition wall, and the fourth partition wall is arranged from the bottom surface of the storage tank body to a position lower than the standard water level surface of the storage tank body.

6. A floor-mounted grease interceptor as described in claim 5, characterized in that during oil-water separation, wastewater flows from the inlet chamber to the separation chamber within the storage tank body, and from the separation chamber to the outlet chamber, and is guided in a U-shape when viewed from above.

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