JP2017190655A - Interceptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interceptor that prevents fats contained in drainage flowing into a drainage inflow chamber from being chopped finely, makes the fats float efficiently in a separation chamber, and prevents back flowing of the floating fats in the separation chamber to the drainage inflow chamber.MEANS FOR SOLVING THE PROBLEM: A tank body of an interceptor includes a drainage inflow chamber with a basket into which drainage flows, a separation chamber that makes fats float and become separated using a difference in specific gravity between water and oil, and a trap for preventing backflow of odor and others from a drainage inlet. A straightening plate is provided on or below a bottom surface of the basket in the drainage inflow chamber. A partition wall rises from a bottom part of the tank for partitioning between the drainage inflow chamber and the separation chamber. An overflow section is provided on the partition wall at a position higher than a standard water level surface.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a trap or a trap for separating and collecting oils and fats from wastewater before the oils and fats contained in the wastewater flow into the sewage.

If wastewater containing oils, fats, gasoline, earth and sand, etc., is run into sewage as it is, there is a risk of clogging or damaging the sewage pipes, etc. If there is a risk of hindering the function of the piping equipment, install a interceptor in an effective position. It is obliged to do. As an example of the interceptor, there is a grease interceptor that separates and collects oils and fats from waste water discharged from a restaurant kitchen.

  The grease interceptor has a storage tank body, a drainage inflow chamber with a basket that removes residues and dust mixed in the drainage that has flowed into the storage tank body from the side groove or pipe, and the residue and dirt are removed. A separation chamber that separates oils and fats from the wastewater that has been collected, and a drainage trap that prevents odors and insects from entering the sewer pipes at the outlet that discharges the wastewater from which oils and fats have been separated into the sewer pipes. It is done.

  In the grease interceptor, oils and fats are separated from waste water by using a natural levitation separation method that utilizes the difference in specific gravity between water and oil. In consideration of the SHASE standard (SHASE-S217. Standard of the Air Conditioning and Sanitary Engineering Association), the oil interceptor efficiency (separation and removal efficiency of fats and oils) is required to be higher than the conventional one. Increasing efficiency is an important issue.

The natural buoyancy separation type grease interceptor does not require a pressure pump, for example, as in the case of pressure levitation, and is a reason why it is widely used because of its simple structure and low cost. It cannot be separated and removed. In addition, there is a limit to the size of oil droplets that can be naturally floated and separated.

Furthermore, in the past, the maximum amount of water that can be stored in the storage tank at the allowable inflow rate (the maximum inflow rate that can maintain the interception efficiency of the interceptor) that is determined to maintain the processing capacity of the grease interceptor. (Hereinafter referred to as “actual capacity”), it was set at 75%. However, such restrictions have been removed at present, and the allowable inflow rate will be less if the interception efficiency required by the SHASE standard can be maintained. The decision was left to the manufacturers.

  In general, in the natural levitation separation method, the flow rate of drainage in the storage tank is slower, and the larger the separation tank, the more likely the oils and fats to float. The restriction of the inflow flow rate tends to be eliminated and the amount tends to increase, and as a result, the flow velocity in the storage tank tends to increase. In addition, since the space behind the ceiling and under the floor where the storage tank is embedded is limited, the size of the storage tank is naturally limited.

  Furthermore, since the oil floating speed in water is generally higher as the particle size of the oil droplet is larger, the particle size of the fats and oils contained in the drainage is as large as possible in the grease interceptor by the natural floating separation method. Is preferable. However, in reality, wastewater that flows in a turbulent state from the side gutter or pipe in the upstream to the wastewater inflow chamber in the storage tank is mixed with wastewater in the wastewater inflow chamber and newly introduced wastewater, and the oils and fats tend to be agitated. . Further, the fact is that the fats and oils mixed in the waste water tend to be finely sheared by passing through the holes or meshes of the basket.

In addition, in the natural levitation separation method, the fats and oils that have floated in the separation tank will be removed by regular cleaning, but if the cleaning is neglected, the amount of fats and oils that have floated in the separation tank will increase cumulatively. Even oils and fats separated with great difficulty may flow out into the sewer pipe along the drainage flow. That is, the interception efficiency varies depending on the use frequency and the cleaning frequency, and is not stable.

Japanese Patent Laid-Open No. 2002-256618

  In Patent Document 1, by forming the front plate 230a of the basket 230 attached to the inlet 202 of the interceptor 201 with a non-perforated plate, the inflowing wastewater hits the front plate 230a and is reversed, and the momentum is weakened. Since the water flows out of the rear plate of the basket 230 and the water passage holes 230f of the left and right side plates and forms a gentle water flow toward the outlet, the fats and oils contained in the drainage are As a result, it becomes easier to separate and improve the interception efficiency.

  However, in Patent Document 1, the fats and oils floating on the main body of the interceptor 201 always remain in the basket 230 through the water holes of the rear plate and the side plate of the basket 230. In particular, when the inflow of drainage stops, the oils and fats floating in the interceptor return to the basket 230. Therefore, when the wastewater flows in, the fats and oils in the basket 230 are agitated by the wastewater that has flowed in vigorously, become fine particles, and flow out to the outlet before floating.

Therefore, in the present invention, the fats and oils contained in the wastewater flowing into the drainage inflow chamber are not finely sheared, the wastewater moves from the drainage inflow chamber to the separation chamber, and the fats and oils are efficiently levitated in the separation chamber, In addition, the fats and oils that have floated in the separation chamber are not allowed to flow back to the drainage inflow chamber, but are agitated by the wastewater that has entered from the drainage inflow chamber to become fine particles and are discharged into the drainage flow to the outlet. The problem is to provide a new interceptor.

  The interceptor according to the present invention includes a drainage inflow chamber provided with a basket into which drainage flows, a separation chamber that floats and separates fats and oils using a specific gravity difference between water and oil, and a drainage flow. A trap that prevents backflow of odors from the inlet is provided, and a baffle plate is provided at the bottom or below the basket of the drain inflow chamber, and a partition that separates the drain inflow chamber from the separation chamber is raised from the bottom of the storage tank body. The partition wall is provided with an overflow portion at a position higher than the standard water level surface.

  According to the present invention, the rectifying plate is provided on the bottom surface or the lower side of the basket, so that the drainage containing the oils and fats flowing into the drainage inflow chamber is prevented from entering into the storage tank vigorously. The drainage whose momentum has been relaxed by the current plate flows out from the front, rear, left and right sides of the basket, and the fats and oils are not easily sheared finely without stirring the fats and oils floating in the drainage inflow chamber.

  In addition, since the partition wall rises from the bottom of the storage tank body, the water level in the drainage inflow chamber rises due to the inflow of drainage, and oils and fats floating in the drainage inflow chamber are positively pushed out to the separation chamber. Since the overflow section plays the role of a weir, a certain amount of drainage exceeding the weir flows from the drainage inflow chamber into the separation chamber, and is arranged in a uniform flow with respect to the flow direction. In addition, since the overflow section is at a position higher than the standard water level surface, even if the inflow of drainage stops, the fats and oils floated and separated in the separation chamber do not return to the drainage inflow chamber.

  Further, the interceptor of the present invention prevents the wastewater flowing into the drainage inflow chamber from jumping from the front surface of the basket (downstream side = surface on the partition wall side) to the separation chamber without passing over the overflow part of the partition wall. A baffle plate is provided to prevent it.

  According to the new SHASE standard, there is no limit to the allowable inflow rate of the interceptor to the storage tank body, and a large amount of wastewater may flow into the drainage inflow chamber of the storage tank at a time. In that case, the drainage gets momentum and may flow over the overflow part of the bulkhead directly from the front of the basket and flow into the separation chamber. The oil and fat collide, and the oil and fat are agitated and finely divided. In addition, if the drainage does not overflow at the overflow section, the drainage loses the opportunity to be adjusted to a uniform flow, the flow velocity becomes uneven, and the separation efficiency decreases. The baffle plate of the present invention prevents such a situation and guides the drainage so that the drainage flowing into the drainage inflow chamber always overflows the overflow section provided in the partition wall.

  Furthermore, the interceptor of the present invention is provided with another partition immediately downstream of the partition wall provided with the overflow section, and the waste water exceeding the overflow section has a flow path between the two partition walls. The downstream partition wall has a lower end at a position away from the bottom of the storage tank to form a communication space between the drainage inflow chamber and the separation chamber, and the drainage is guided to the separation chamber through the flow path. It is characterized by that.

  According to the present invention, the drainage guided through the narrow flow path of the two partition walls maintains a uniform flow in the flow direction, and swirl is likely to occur when it exceeds the overflow part of the upstream partition wall. It is difficult to generate a flow. If the generation of the swirl flow is left as it is, the oil and fat content, water and air are agitated, and foamy oil and fats are generated, so that the intercepting efficiency is lowered.

  Further, the interceptor of the present invention has a partition wall separating the separation chamber and the trap, and the partition wall is provided with a communication space as a drainage passage between the bottom of the storage tank and surrounds the periphery of the trap. It is a drainage outflow chamber, and is characterized by being formed in a liquid-tight or cylindrical shape and locked to the side wall of the storage tank so that oil floating in the separation chamber does not enter the drainage outflow chamber.

According to the present invention, the partition wall forming the drainage outflow chamber is formed so as to surround the periphery of the trap, so that the volume of the separation chamber can be secured as large as possible.
Generally, in the grease interceptor, the ratio of the surface area of the separation chamber that separates the fats and oils in the storage tank body from the wastewater is as large as possible, but the oils and oils interception efficiency is higher when compared with a storage tank of the same capacity .

  In the present invention, the communication space provided in the lower part of the partition wall separating the separation chamber and the drainage outflow chamber is provided at a position lower than the trap inlet.

As a result, even if a siphon phenomenon occurs in the trap (seal phenomenon in which all drainage in the drain trap is pulled and drawn downstream and breaks the sealed water), It is possible to prevent the fats and oils from flowing out from the outlet without being blocked by the water and flowing into the drainage outflow chamber.

  Furthermore, when the drainage flows into the separation chamber from the opening provided between the lower end of the second partition wall and the bottom of the storage tank, the interceptor of the present invention allows the fats and oils contained in the drainage to flow onto the water surface of the separation chamber. The guide plate is raised from the bottom of the storage tank downstream of the opening so as to easily float.

  According to the present invention, the fats and oils contained in the wastewater are easily floated to the surface of the separation chamber as the flow is guided by the guide plate. When there is no guide plate, drainage tries to flow through the bottom of the storage tank, which is the shortest distance from the communication space at the bottom of the drainage outflow chamber to the outlet, but the flow of drainage becomes longer due to the guide plate. It becomes easier to float and separate.

  According to the present invention, the fats and oils contained in the wastewater flowing into the drainage inflow chamber are efficiently levitated in the separation tank without being finely sheared, and the fats and oils floated in the separation tank are allowed to flow into the wastewater. Since it does not flow back to the room, high interception efficiency can be achieved, and an environmentally friendly interceptor can be provided.

It is sectional drawing of the interceptor of this invention. It is a top view of the interceptor of this invention. It is a figure which shows the Example of the baffle plate which concerns on this invention. It is a figure which shows the Example of the baffle plate which concerns on this invention. It is a figure which shows the Example of the guide plate which concerns on this invention. It is a figure which shows the Example of the partition which separates the separation chamber and drainage outflow chamber based on this invention. It is sectional drawing of the interceptor which concerns on patent document 1. FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  Reference numeral 1 in FIG. 1 is an interceptor according to the first embodiment of the present invention. A rectangular storage tank body 2 having a relatively deep depth is provided with a side groove or a drain pipe (not shown) provided on a floor such as a kitchen. Inlet 3 into which wastewater containing soot and fats and oils flowing in from the inflow flows, and just below inlet 3 is a wire mesh with countless holes through which drainage and fats and oils pass in order to remove soot from the inflowing wastewater. A basket 4 made of punching metal or the like is installed.

Further, in order to further remove oils and fats from the drainage from which the dredging has been removed, a partition wall 6 is provided downstream of the basket 4, and the space of the storage tank body 2 in which the basket 4 is installed is used as the drainage inflow chamber 5, and downstream thereof. A space in which a part of the storage tank body 2 is floated and separated using a difference in specific gravity between oil and water is defined as a separation chamber 7.

The waste water from which the fats and oils have been removed in the separation chamber 7 flows out through the trap 8 to an outlet 9 connected to sewage (not shown). The trap 8 shown in FIG. 1 is a so-called one-type trap. The flow path is formed in the vertical direction, and the vertical straight pipe portion 8a for flowing down the drainage, and connected to the lower end of the vertical straight pipe portion 8a, A bent pipe portion 8b such as an elbow that is changed from the horizontal direction to the horizontal direction, and a sealing cap 8d that is attached so as to cover the upper end opening 8c of the vertical straight pipe portion 8a from above. It is connected to an outlet 9 provided at a low position of the reservoir main body 2 of the interceptor.

  According to the definition of the SHASE standard, the water level surface when the actual volume of stored water is contained in the storage tank body 2 is referred to as the standard water level surface WL, but the standard water level surface WL of the present embodiment is the vertical water level of the trap 8. The height of the upper end opening 8c of the straight pipe portion 8a is the standard water level surface. Further, the lower end 8d 'of the sealing cap 8d is installed at a position deeper than the upper end 8c of the vertical straight pipe portion 8a, and the overlapped vertical distance is the sealing depth SW required by the SHASE standard.

By the way, as shown in FIG. 1 and FIG. 3A, the bottom surface of the basket 4 is formed with a non-perforated plate 41 that does not allow drainage and oils and fats to pass through. It will flow out from the front, back, left and right sides.

  The partition wall 6 has a width that is full of the left and right (short side) widths of the storage tank body 2 and rises from the bottom so that drainage does not flow between the lower end of the partition wall 6 and the bottom of the storage tank body 2. It is provided so as to be removable from the storage tank body 2. In addition, the partition wall 6 is provided with an opening 6 a so that the waste water from the waste water inflow chamber 5 can flow into the separation chamber 7. The opening 6a opens to the full width of the storage tank body 2 in the left-right direction.

When drainage flows from the inflow port 3, the water level rises above the standard water level surface WL, but the lower end 6 b of the opening 6 a is provided at a position higher than the standard water level surface WL, and the drainage inflow chamber The drainage from which the soot has been removed in 5 flows over the lower end 6 b of the partition opening 6 a and flows into the separation chamber 7. The lower end 6b serves as a weir for adjusting the flow rate and the water level, and is also an overflow portion for drainage.

Since the waste water flowing in from the inlet 3 hits the non-perforated plate 41 provided on the bottom surface of the basket 4 and flows out from the front, rear, left and right side surfaces of the basket 4, the momentum is weakened to the depth of the drain inflow chamber 5. Since the oils and fats are not submerged, the agitation that oils and fats are sheared into fine particles in the drainage inflow chamber 5 does not occur, and the fats and oils easily float on the surface of the drainage inflow chamber 5 with a large particle diameter.

  Since the overflow section 6b is provided at a position higher than the standard water level surface WL and is wide on the left and right sides, the drainage blocked by the partition wall 6 gradually raises the water level in the drainage inflow chamber 5. Thus, the flow becomes uniform and overflows the overflow portion 6b. The oil and fat that has floated on the surface of the drainage inflow chamber 5 due to the inflow of the wastewater is positively pushed to the separation chamber 7 beyond the overflow section 6b, so that the amount of oil and fat remaining in the drainage inflow chamber 5 is extremely small.

  Further, in the present embodiment, as shown in FIG. 1, the waste water that has overflowed the overflow section 6b of the partition wall 6 enters the separation chamber 7 and does not agitate the oils and fats floating in the separation chamber. In addition, another partition 10 is provided.

The partition wall 10 is a flat plate having the full width of the storage tank body 2 detachably provided from the storage tank body 2 in the same manner as the partition wall 6. The partition wall 6 and the drainage flowing into the opening 6 a together with the partition wall 6. A flow path 11 for guiding the gas to the separation chamber 7 is formed. The lower end of the partition wall 10 is provided at a position away from the bottom of the storage tank body 2, and the communication space 12 from the flow path 11 to the separation chamber 7 is formed almost full of the left and right width of the storage tank body 2.

  The distance formed between the partition wall 6 and the partition wall 10 (in the longitudinal direction of the storage tank main body 2) is desirably as narrow as possible while maintaining the level of drainage with an allowable inflow rate without stagnation.

Drainage that has flowed into the flow path 11 from the opening 6a of the partition wall 6 is guided to the communication space 12 at the lower end of the downstream partition wall 10, and the narrow flow path 11 causes a uniform flow with respect to the flow direction. While being maintained, it becomes difficult to generate a swirl flow that is likely to occur when the overflow section 6b of the upstream partition wall 6 overflows.

  Further, as shown in FIG. 1, a guide plate 13 is provided immediately downstream of the communication space 12 so as to rise obliquely from the bottom of the storage tank body 2. The guide plate 13 guides the drainage through the communication space 12 toward the upper side of the separation chamber 7.

When this guide plate 13 is not provided, the drainage through the communication space 12 tends to flow through the shortest distance toward the communication space 16 to the drainage outflow chamber 15 described later. Since it flows so as to crawl the bottom surface, by providing the guide plate 13, the flow of waste water can be guided upward of the separation chamber 7, and the floating separation of fats and oils can be further promoted.

  Further, as shown in FIGS. 1 and 2, a partition wall 14 that separates the separation chamber 7 and the trap 8 is provided. As can be seen from FIG. 2 and FIG. 6A, the partition wall is formed in a three-dimensional plan view having a flat plate on three surfaces except the outlet 9 side, and is stored so as to surround the trap 8. The tank body 2 is locked to the inner wall on the outlet 9 side. The partition wall 14 is detachably locked from the storage tank body 2.

  A space surrounded by the partition plate 14 forms a drainage outflow chamber 15. The lower ends 14a of the three U-shaped surfaces of the partition plate 14 are in contact with the bottom surface of the storage tank body 2, but are each provided with a notch 14b. From the communication space 16 formed by the notch 14b and the bottom surface of the storage tank body 2, the waste water after the oils and fats are removed in the separation chamber 7 flows into the drainage outflow chamber.

In FIG. 6A, the notch 14b is disclosed as being provided on all three surfaces, but the notch 14b may be provided only on the left and right sides or on the front side. The notch 14b is provided at a position lower than the lower end 8d ′ of the sealing cap 8d of the trap 8. This is because even if it is broken, water can be sealed by the lower end 8d 'of the sealing cap 8d and the notch 14b, and the oils and fats in the separation chamber 7 can be prevented from flowing into the drainage outflow chamber 15. .

  Unlike the conventional case, if the separation chamber and the drainage outflow chamber are separated by a partition wall that is provided to the full width of the left and right, the proportion of the drainage outflow chamber with respect to the storage tank main body is increased. As shown in FIG. 2, the partition wall 14 provided so as to surround 8 can secure a large volume and surface area of the separation chamber 7. Compared with storage tanks of the same capacity, the flotation time of fats and oils is increased accordingly, and as a result, the trapping efficiency is increased and the allowable inflow flow rate can be increased.

  On the other hand, as shown in FIG. 2, the volume and surface area of the separation chamber 7 are widened, and the oils and fats floating on the surface of the separation chamber 7 are close to the outlet 9 in terms of distance. For this reason, the engaging portion of the inner wall of the storage tank main body 2 (not shown) that engages the flange portion 14c of the partition wall 14 shown in FIG. 6A does not allow oils and wastewater in the separation chamber 7 to leak into the drainage inflow chamber 15. Therefore, it is necessary to make a proper liquid seal such as packing or mechanical structure (however, it is wise to refrain from using sponge packing due to hygiene management problems).

  In other embodiments, as shown in FIG. 3 (b), it can be disposed only at a location that receives concentrated drainage flowing into the non-perforated plate 42 provided on the bottom surface of the basket 4. Since the basket 4 must be removed from the storage tank body 2 and cleaned at least once a day, the basket 4 must be cleaned rather than providing a non-perforated plate 41 on the bottom of the basket 4 shown in FIG. The weight of the basket 4 as a whole is reduced, and the resistance of water when the basket 4 is pulled up is reduced, so that the burden of cleaning is reduced. Moreover, since the inflow port 3 is not only provided in the longitudinal direction of the storage tank main body 2 as shown in FIG. 2, it may be provided in either of the left and right directions. It is sufficient to provide the non-perforated plate 42.

  Further, as shown in FIG. 3C, the basket 4 itself is a conventional one in which all of the front, rear, left, and right side surfaces and the bottom surface have holes such as punching metal, and a non-perforated plate 43 is provided below the basket 4. May be. This non-perforated plate 43 plays a role of preventing drainage flowing into the drainage inflow chamber 5 from the bottom surface of the basket 4 deeply into the bottom of the storage tank body 2 and preventing the drainage from being stirred. Depending on the depth of 2, it can be provided at any depth from just below the bottom surface of the basket 4 to about half the depth of water.

  The non-porous plates 41, 42, and 43 shown in FIGS. 3A, 3B, and 3C all serve as rectifying plates. In particular, the rectifying plate 43 does not necessarily need to be a flat plate, and is not curved. A perforated plate may be used.

  Furthermore, as another embodiment, as shown in FIGS. 4 (a) and 4 (b), instead of making the opening 6a of the partition wall 6 a complete opening, a flat plate 61 that contacts the opening 6a is placed on the basket side at the opening upper end c. The flat plate 61 can also be used as a baffle plate.

  As described above, according to the new SHASE standard, there is no limit on the allowable inflow rate to the storage tank body 2, and a large amount of wastewater may flow into the drainage inflow chamber 5 at a time. At that time, the drainage may be vigorous and may jump from the front surface 4a of the basket 4 directly into the overflow chamber 6b of the partition wall 6 and flow into the separation chamber 7 without overflowing.

In that case, the drainage is not slowed down by the rectifying plate of the basket 4 or the overflow part 6b of the partition wall 6, and is not adjusted to a uniform flow, and the flow velocity becomes uneven. Moreover, when the drainage with the momentum flows into the flow path 11 or the separation chamber 7 as it is, it collides with the fats and oils floated and separated in the separation chamber 7, and the fats and oils are stirred and finely divided.

The baffle plate 61 of the present embodiment prevents such a situation and guides the wastewater flowing into the drainage inflow chamber 5 so as to always pass through the rectifying plate of the basket 4 and the overflow portion 6 b provided in the partition wall 6. To do.

  As another embodiment of the baffle plate, as shown in FIG. 4 (c), the front surface 4a of the basket 4 may be a non-perforated plate 62. As shown in FIG. 4 (d), the baffle plate 63 is replaced with a basket. 4 may be provided between the front surface 4a of 4 and the partition wall 6. In particular, the baffle plate 63 is not necessarily a flat plate and may be a curved non-perforated plate.

  Further, as another embodiment of the guide plate, as shown in FIG. 5A, a guide plate 101 that is obliquely upward may be provided integrally with the partition wall 10, and a vertical direction as shown in FIG. It is good also as the guide plate 102 which stands up.

  Furthermore, as another embodiment of the partition wall that separates the separation chamber 7 and the drainage / outflow chamber 15, as shown in FIG. 6B, a rectangular tubular partition wall 141 that surrounds the trap 8 in four directions may be used. By making the cylinder 141 so as to cover the entire surface 141 a on the outflow port 9 side, it is possible to prevent oils and fats in the separation chamber 7 from leaking into the drainage outflow chamber 15. A notch 141 b provided in the lower part of the surface 141 a on the outlet 9 side is provided for the curved pipe portion 8 b of the trap 8 and the outlet 9.

  In addition, although not illustrated, the cylindrical shape does not necessarily need to be a square tube, and may be a cylinder. The one-type trap as shown in FIG. 1 is an example, and the trap according to the present invention is not limited to this, and may be, for example, a T-type trap or a trap of another shape.

  Similarly to the inflow port 3, the outflow port 9 is not only provided in the longitudinal direction of the storage tank main body 2, but may be provided in any of the left and right directions, and at the position where the trap shape and the outflow port are provided. It goes without saying that various shapes can be considered for the shape of the partition wall surrounding the trap.

DESCRIPTION OF SYMBOLS 1 Interceptor 2 Reservoir main body 3 Inlet 4 Basket 5 Drainage inflow chamber 6, 10, 14, 141 Bulkhead 6b Overflow part 7 Separation chamber 8 Trap 9 Outlet 11 Channel 12, 16 Communication space 13, 101, 102 Guidance Plate 15 Drainage outflow chamber 41, 42, 43 Current plate 61, 62, 63 Baffle plate WL Standard water level surface SW Sealing depth

Claims (6)

  A drainage inflow chamber with a basket into which drainage flows, a separation chamber that floats and separates oils and fats using the difference in specific gravity of water and oil, and a reverse flow such as odor from the drainage inlet A trap is provided, and a baffle plate is provided on the bottom or lower side of the basket of the drainage inflow chamber, and a partition that separates the drainage inflow chamber from the separation chamber is raised from the bottom of the storage tank body, and the partition Has an overflow section at a higher position than the standard water level surface.   A baffle plate is provided to prevent the wastewater flowing into the drainage inflow chamber from jumping from the front surface of the basket without flowing over the overflow portion of the partition wall and entering the separation chamber. The interceptor according to claim 1.   Another partition is provided immediately downstream of the partition where the overflow section is provided, and the waste water exceeding the overflow section has a flow path between the two partitions, and the downstream partition Has a lower end at a position away from the bottom of the storage tank body to form a communication space between the drainage inflow chamber and the separation chamber, and guides drainage to the separation chamber through the flow path. The interceptor according to claim 1 or 2, characterized in that A partition that separates the separation chamber and the trap is provided, and the partition is provided with a communication space that serves as a passage for drainage between the bottom of the storage tank, and includes a drainage outflow chamber that surrounds the periphery of the trap. 4. The oil according to claim 1, wherein the oil floating in the separation chamber is formed in a liquid-tight shape or a cylindrical shape so as not to enter the drainage outflow chamber and is locked to a side wall of the storage tank. The interceptor as described in any one.   The obstruction according to claim 4, wherein the communication space provided in a lower part of the partition wall separating the separation chamber and the drainage outflow chamber is provided at a position lower than an inflow port of the trap. vessel. When drainage flows into the separation chamber from the communication space of the downstream partition wall, the guide plate is raised from the bottom of the storage tank so that the fats and oils contained in the drainage easily float on the water surface of the separation chamber. The interceptor according to claim 1, wherein the interceptor is raised.

Images