JP5952991B2 - How to clean a tank in a grease trap - Google Patents

Description

  The present invention relates to a grease trap for removing sludge such as floating oil and fat and sediment contained in waste liquid from kitchens of restaurants and hotels, and a tank cleaning method in the grease trap.

  Waste liquid from kitchens of restaurants, hotels, hospitals, etc. contains floating oils and fats, sludge such as oil and sediment. In order to remove the sludge, a grease trap (oil treatment device) is installed. There are types of conventional grease traps installed in the kitchen. As a recent trend, since the height of each floor where a building is built is low, it has become mainstream to install a grease trap with a very shallow water depth. The grease trap is provided with an iron plate lid, which becomes a part of the kitchen floor. In addition, since the water depth of the grease trap is shallow, the area of the iron plate lid is increased. However, when the building is completed, the area of the iron plate lid cannot be increased, and as a result, the capacity of the grease trap tends to be reduced.

  As a result, the above-mentioned grease trap is frequently cleaned for maintenance, so that a maintenance burden is imposed. Furthermore, since the grease trap is installed in the kitchen, it is difficult to perform the cleaning work and the vacuum car may not be used. In addition, since drainage work is required to allow all the wastewater in the kitchen to flow into the grease trap, equipment costs such as raising the floor to the bottom and providing side grooves are required.

  Since the grease trap is a so-called contaminated area in terms of food hygiene, the sanitary environment is poor because a person who cooks in the kitchen performs a process such as cleaning of garbage in the grease trap. Furthermore, since the kitchen floor is wet, bacteria are easy to propagate, and the hygienic environment of the grease trap is not good. Moreover, since the kitchen floor is wet, the iron plate lid is slippery and dangerous. Furthermore, in order to drop cooking scraps and the like on the kitchen floor, it is an environment in which pests are likely to be generated on the floor, side grooves and grease traps.

  In addition, the grease trap described above greatly affects the grease removal rate due to a change in the temperature of the waste liquid. For example, when hot water is allowed to flow in a state where the floating oil and fat is cold, the oil and fat in contact with the hot water settles and a part of the oil and fat flows out from the grease trap.

  On the other hand, as shown in Patent Document 1, a grease trap of the type installed outdoors has been developed, and the problems of the type of grease trap installed in the kitchen can be solved.

  A schematic configuration of the grease trap 110 of Patent Document 1 is shown in FIGS. 8 and 9. The tank 111 of the grease trap 110 is composed of an outer tank 112 having a bottom 113 inclined downward to the approximate center of the cross section, and an inner tank 115 inserted into the outer tank 112. The bottom of the inner tank 115 has a partition plate 120 that is inclined upward toward the approximate center of the cross section. When the inner tank 115 is inserted into the outer tank 112, the partition plate 120 has a function of dividing the inside of the tank 111 into an upper chamber 116 of the inner tank 115 and a lower chamber 114 of the outer tank 112. Further, an oil passage hole 121 through which floating oil separated from the waste liquid in the lower chamber 114 can pass to the upper chamber 116 is formed in the upper part of the partition plate 120.

  In addition, an inlet channel pipe 131 is provided in the tank 111 for flowing waste liquid flowing from an external upstream sewage pipe into the lower chamber 114 downward from the upper side of the tank 111. Further, the treated water in the lower chamber 114 from which the sediment and fats and oils are separated is directed upward from the upper side of the tank 111, that is, from the almost same height as the upper end position of the inlet channel pipe 131 to the outside downstream side. An outlet channel pipe 132 for discharging to the sewer pipe is provided.

  Further, the tank 111 is provided with a lid portion 117 that covers the opening at the top of the inner tank 115. The lid portion 117 is provided with, for example, three through holes 118a, 118b, and 118c, and the holes 118a, 118b, and 118c are detachably closed by plugs 119a, 119b, and 119c. A pipe 140 extending from the upper chamber 116 to the lower chamber 114 through the oil passage hole 121 of the partition plate 120 is connected to the central hole portion 118a. The pipe 140 serves as a guide for easily and reliably reaching the bottom 113 of the lower chamber 114 by inserting, for example, a vacuum hose.

  The waste liquid flowing from the upstream side flows into the lower chamber 114 downward from the upper side of the tank 111 through the inlet channel pipe 131 of the grease trap 110. The sediment in the waste liquid settles in the lower chamber 114 and is accumulated almost at the center by the bottom 113 inclined downward. On the other hand, the floating oil and fat in the waste liquid rises separately from the water, and accumulates on the water surface of the waste liquid in the upper chamber 116 through the oil and oil passage hole 121 at the center by the partition plate 120 inclined upward. . In addition, since the partition plate 120 is inclined upward, the oil does not flow back to the lower chamber 114.

  As a result, the waste liquid that has flowed into the tank 111 becomes treated water from which sediment and oil have been separated when passing through the lower chamber 114. The treated water flows upward from the lower chamber 114 in the outlet channel pipe 132 and is discharged from the upper side of the tank 111 to the downstream downstream sewage pipe. Accordingly, since the waste liquid flowing in the lower chamber 114 does not directly contact the already separated oil and fat, the oil and fat is not affected by the temperature change of the waste liquid that flows later. Therefore, the situation where the already separated oil and fat is mixed with the treated water and flows to the external sewer pipe is avoided.

  As described above, the grease trap 110 of Patent Document 1 has a high oil removal rate, and since a large capacity tank 111 can be installed outdoors, a large amount of oil is retained, so that the number of maintenance is small. Further, since the sludge in the tank 111 can be collected by the vacuum car, the cleaning operation is easy and the effectiveness of the grease trap 110 can be maintained. Furthermore, since the grease trap 110 is installed outdoors, the kitchen floor can be in a dry environment. For this reason, the inside of the kitchen is hygienic because the bacteria hardly propagate. In addition, it is safe because the kitchen floor does not slip. Because there are no so-called polluted areas in the kitchen, cooks can work in a good environment. In addition, pests are less likely to occur because cooking scraps are not dropped on the kitchen floor. Water for washing the kitchen floor can be greatly reduced, and there is also a water-saving effect.

WO2007 / 127612A1

  Although the grease trap 110 of Patent Document 1 has various effects as described above, there is room for improvement in that the inside of the tank 111 is efficiently cleaned and washed in a short time.

  When collecting the sludge accumulated in the tank 111 of the grease trap 110 and cleaning the inside of the tank 111, a collecting means such as a vacuum car is used. First, the vacuum hose of the vacuum car is inserted into the upper chamber 116 from the hole 118b other than the central hole 118a of the lid 117, and the waste liquid containing fats and oils in the upper chamber 116 is sucked and collected by the vacuum hose. To do. However, since the partition plate 120 is inclined upward, the waste liquid accumulates between the inner surface of the upper chamber 116 and the partition plate 120. Actually, the waste liquid collected near the boundary between the partition plate 120 and the inner surface of the upper chamber 116 remains because it cannot be sucked.

  Thereafter, the vacuum hose is inserted into the central hole 118 a of the lid portion 117, and reaches the bottom 113 of the lower chamber 114 through the pipe 140. The vacuum hose sucks and collects sediment and residual waste liquid that has settled at the bottom 113 of the lower chamber 114.

  As described above, if the waste liquid collected in the vicinity of the boundary between the partition plate 120 and the inner surface of the upper chamber 116 is left, there is a problem in terms of generation of bad odor and hygiene. In order to avoid this, it is necessary to remove the lid 117 from the tank 111, open the top of the tank 111, and wash the inside of the tank 111 with a brush or the like while discharging the washing water. It's not easy and requires a lot of time and effort.

  Even if the high pressure cleaning nozzle 60 is inserted from the hole 118b other than the central hole 118a and the inside of the tank 111 is cleaned by spraying the high pressure cleaning water, the pipe 140 extends from the central hole 118a to the tank 111. It is difficult to clean because it extends downward in the approximate center of the inside. The high pressure cleaning nozzle 60 cannot be moved freely in the tank 111 due to the pipe 140 being in the way. At present, cleaning with high-pressure cleaning water is not performed. Further, even when cleaning with high-pressure cleaning water is performed, the high-pressure cleaning water accumulates between the upper surface of the partition plate 120 and the inner surface of the upper chamber 116. Even if the collected washing water is sucked and collected by a vacuum hose inserted from another hole 118c, the collected washing water remains near the boundary between the partition plate 120 and the inner surface of the upper chamber 116. End up. In addition, since it is necessary to suck the washing water that has flowed down into the lower chamber 114 with the vacuum hose, it takes time and effort because the vacuum hose is used to put in and out the holes 118a, 118b, 118c many times. It will be.

  The present invention has been made in view of the above, and when collecting sludge in a tank by suction with a vacuum hose, sludge falls into the lower chamber without collecting on the upper surface of the partition plate, so that sludge recovery efficiency is achieved. It is an object of the present invention to provide a grease trap improved so as to improve the cleaning time and shorten the cleaning time of the tank.

  In order to solve the above problems, a grease trap according to the present invention includes a tank having a bottom portion that is inclined downward, a partition plate that is inclined upward to divide the tank into an upper chamber and a lower chamber, and an upper portion of the partition plate. And the oil and fat passage hole provided so that the oil and fat separated from the waste liquid in the lower chamber can be passed to the upper chamber, the inlet passage for flowing the waste liquid from the outside of the tank to the lower chamber, and the oil and fat are separated A grease trap having an outlet channel for discharging the treated water to the outside of the tank, wherein the waste liquid on the partition plate flows at a boundary between the partition plate and the inner surface of the tank. A difference is provided, and a waste liquid passage hole through which waste liquid on the partition plate passes to the lower chamber is provided in the partition plate at a position where the height difference is low.

  Moreover, it is preferable that a plurality of the waste liquid passage holes are provided, and the tank is preferably cylindrical. The tank preferably includes a lid portion that covers an upper portion of the tank, and at least one hole portion is provided in the lid portion. It is preferable that one hole portion in the lid portion is positioned substantially in line with the oil passage hole of the partition plate. It is preferable that a cleaning nozzle can be inserted into at least one other hole in the lid.

  The method for cleaning a tank in the grease trap of the present invention includes a tank having a bottom portion inclined downward, a partition plate inclined upward for dividing the inside of the tank into an upper chamber and a lower chamber, and an upper portion of the partition plate. And the oil / fat passage hole provided so that the oil / fat separated from the waste liquid in the lower chamber can be passed to the upper chamber, the inlet channel for flowing the waste liquid from the outside of the tank to the lower chamber, and the oil / fat are separated. At the boundary between the outlet channel for discharging treated water to the outside of the tank, the lid portion covering the upper portion of the tank and having one or more holes, and the partition plate and the inner surface of the tank A grease trap having a height difference in which the waste liquid on the partition plate flows and a waste liquid passage hole provided in the partition plate at a position where the height difference is low so that the waste liquid on the partition plate can pass to the lower chamber. No tongue A vacuum hose is inserted into the upper chamber from one hole of the lid, and the waste liquid containing the oil and fat collected in the upper chamber is sucked, and then the vacuum hose Is inserted into the lower chamber through the oil passage hole of the partition plate, and the waste liquid containing sediment settled in the lower chamber is sucked and flows into the lower chamber through the waste liquid passage hole. It includes a step of sucking and collecting the waste liquid on the partition plate.

  The tank cleaning method for the grease trap of the present invention includes a tank having a bottom portion that is inclined downward, a partition plate that is inclined upward to divide the tank into an upper chamber and a lower chamber, and an upper portion of the partition plate. And the oil and fat passage hole provided so that the oil and fat separated from the waste liquid in the lower chamber can be passed to the upper chamber, the inlet passage for flowing the waste liquid from the outside of the tank to the lower chamber, and the oil and fat are separated An outlet channel for discharging the treated water to the outside of the tank, a lid portion covering the upper portion of the tank and having one or more holes, and the partition plate and the inner surface of the tank Provided with a height difference where the waste liquid on the partition plate flows at the boundary, and provided with a waste liquid passage hole provided in the partition plate at a position where the height difference is low so that the waste liquid on the partition plate can pass to the lower chamber. Grease trap A cleaning method for cleaning a tank, wherein a vacuum hose is inserted into the upper chamber from one hole of the lid, and further passes through the oil passage hole of the partition plate to the bottom of the lower chamber. After the insertion, the vacuum hose sucks the waste liquid containing sediment settled in the lower chamber, and sucks the waste liquid flowing from the partition plate to the lower chamber through the waste liquid passage hole. It includes a step of collecting.

  Further, a high-pressure washing nozzle is inserted into the upper chamber in the tank from the other hole of the lid, and the inside of the tank is washed by spraying high-pressure washing water from the high-pressure washing nozzle. It is preferable that the method further includes a step of sucking and collecting the washing water that has passed through the waste liquid passage hole and has flowed to the bottom of the lower chamber by the vacuum hose.

  According to the grease trap of the present invention, the waste liquid flowing from the outside flows into the lower chamber through the inlet channel. The sediment in the waste liquid settles in the lower chamber and accumulates on the bottom inclined downward. On the other hand, the floating oil and fat in the waste liquid rises separately from the water, and accumulates on the water surface of the waste liquid in the upper chamber through the oil and oil passage hole by the partition plate inclined upward. As a result, when the waste liquid passes through the lower chamber, it becomes treated water from which sediments and oils and fats are separated. The treated water is discharged from the lower chamber to the outside of the tank through the outlet channel.

  When cleaning the tank, waste liquid containing oil and fat collected in the upper chamber of the tank is sucked by a vacuum hose. When the waste liquid containing the oil and fat in the upper chamber decreases and the oil and fat passage hole of the partition plate appears, the vacuum hose can be inserted into the bottom of the lower chamber as it is without removing the vacuum hose from the upper chamber. Shortening can be achieved. Next, waste liquid containing sediment in the lower chamber is sucked by the vacuum hose. At that time, a height difference is provided at the boundary between the partition plate and the inner surface of the tank, and a waste liquid passage hole is provided in the partition plate at a position where the height difference is low, so that the waste liquid on the partition plate remains smoothly. And flows down from the waste liquid passage hole to the lower chamber. As a result, the sludge in the tank can be recovered in a shorter time than a grease trap that does not have a waste liquid passage hole. Further, since the waste liquid does not remain near the boundary between the partition plate and the inner surface of the tank, problems such as bad odor generation and hygiene can be solved.

  In this way, the cleaning time of one grease trap can be shortened, so that when the number of installed grease traps increases, the overall cleaning cost can be greatly reduced.

  Further, when a plurality of the waste liquid passage holes are provided, the waste liquid near the boundary between the partition plate and the inner surface of the tank is dispersed and flows more smoothly from each waste liquid passage hole. Further, if the tank is cylindrical, the boundary becomes a circular smooth curve, so that the waste liquid on the partition plate flows smoothly into the waste liquid passage hole. In addition, one or more holes are provided in the lid that covers the upper part of the tank, and the one hole is positioned substantially in line with the oil passage hole of the partition plate. It can be smoothly inserted from the hole to the bottom of the lower chamber, which contributes to shortening of the cleaning time.

  Further, according to the tank cleaning method of the grease trap of the present invention, the vacuum hose is inserted from one hole portion of the lid portion to suck the oil in the upper chamber. Next, the vacuum hose can be quickly inserted into the bottom of the lower chamber as it is from the oil / fat passage hole of the partition plate without pulling out the vacuum hose from the hole. That is, it is not necessary to replace the vacuum hose with the other hole portion of the lid portion unlike the conventional grease trap, so that the time can be shortened. Next, while the sediment and waste liquid in the lower chamber are sucked by the vacuum hose, all of the waste liquid near the boundary between the partition plate and the inner surface of the tank also flows down from the waste liquid passage hole to the lower chamber. As a result, the sludge in the tank can be recovered in a shorter time than a grease trap that does not have a waste liquid passage hole. Further, since the waste liquid does not remain near the boundary between the partition plate and the inner surface of the tank, problems such as bad odor generation and hygiene can be solved.

  Instead of collecting the waste liquid in the upper chamber first, a suction hose can be performed by inserting a vacuum hose into the lower chamber through the oil passage hole of the partition plate from the beginning of the operation. According to the present invention, since the waste liquid passage hole is provided, when the waste liquid in the lower chamber is sucked, the waste liquid containing the fats and oils on the partition plate flows into the lower chamber. As a result, it is possible to collect all the waste liquid in the upper chamber by simply bringing the tip of the vacuum hose into the lower chamber and sucking it.

  Further, since the high pressure washing nozzle can be freely moved in the upper chamber of the tank, the inside of the tank can be washed in a short time by jetting high pressure washing water from the high pressure washing nozzle. Since the washing water after the washing flows down from the waste liquid passage hole to the lower chamber without remaining near the boundary between the partition plate and the inner surface of the tank, it can be efficiently and quickly collected by the vacuum hose.

FIG. 1 is a perspective view showing an overall outline of a grease trap according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing an overall outline of the grease trap according to the embodiment of the present invention. FIG. 3 shows another embodiment of the grease trap and is a partial perspective view. 4 (A) and 4 (B) are cross-sectional views schematically showing an action in which the sediment and the floating oil and fat are separated from the waste liquid and accumulated in the tank in the grease trap according to the embodiment of the present invention. . FIG. 5A is a cross-sectional view showing the first vacuum setting step, and FIG. 5B is a cross-sectional view showing the oil and fat collection step. FIG. 6A is a cross-sectional view showing a second vacuum setting step, and FIG. 6B is a cross-sectional view showing a sediment / residual waste liquid recovery step. FIG. 7A is a cross-sectional view showing the setting process of the high-pressure cleaning nozzle, and FIG. 7B is a cross-sectional view showing the high-pressure cleaning process. FIG. 8 is a perspective view showing an overall outline of a conventional grease trap. FIG. 9 is a longitudinal sectional view showing an overall outline of a conventional grease trap.

  Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. 1 and 2 show an overall outline of the grease trap 10. The grease trap 10 according to the present embodiment includes a tank 11 that processes waste liquid from a restaurant or a kitchen of a hotel or hospital. The tank 11 is composed of an outer tank 12 having a bottom portion 13 inclined downward to substantially the center of the cross section, and an inner tank 15 disposed in the outer tank 12. Note that the tank 11 of this embodiment has a cylindrical shape with a circular cross section.

  The bottom of the inner tank 15 has a partition plate 20 that is inclined upward toward the approximate center of the cross section. When the inner tank 15 is inserted into the outer tank 12, the partition plate 20 has a function of dividing the inside of the tank 11 into an upper chamber 16 of the inner tank 15 and a lower chamber 14 of the outer tank 12. Moreover, an oil passage hole 21 through which floating oil separated from the waste liquid in the lower chamber 14 can pass to the upper chamber 16 is formed in the upper part of the partition plate 20.

  Further, at the boundary between the partition plate 20 and the inner surface of the upper chamber 16, there is a height difference in which the waste liquid on the partition plate 20 flows. A waste liquid passage hole 22 through which waste liquid on the partition plate 20 passes to the lower chamber 14 is provided at the lowest position where the height difference is present.

  Further, two or more waste liquid passage holes 22 can be provided. In FIG. 3, a height difference is provided so as to form two lowest positions substantially symmetrically with the oil / fat passage hole 21 as the center, and the waste liquid passage holes 22, 22 are connected to the partition plate 20 at a position where the height difference is low. Provided. As a result, the waste liquid on the partition plate 20 is dispersed into the two waste liquid passage holes 22, 22 and efficiently flows into the lower chamber 14.

  The shape of the tank 11 is not limited to the cylindrical shape of the present embodiment, and may be another shape such as a square cross section. However, in the case of a cylindrical shape, the boundary between the partition plate 20 and the inner surface of the upper chamber 16 is a circular smooth curve, so that the waste liquid on the partition plate 20 can flow smoothly to the waste liquid passage hole 22. .

  In addition, an inlet channel pipe 31 (inlet channel) is provided in the tank 11 for flowing waste liquid flowing from an external upstream sewage pipe from the upper side of the tank 11 downward to the lower chamber 14. Yes. Furthermore, the treated water in the lower chamber 14 from which the sediment and fats and oils have been separated is directed upward from the upper side of the tank 11, that is, from the same height as the upper end position of the inlet flow channel pipe 31 to the outside downstream side. An outlet channel pipe 32 (outlet channel) for discharging to the sewer pipe is provided.

  Further, the tank 11 is provided with a lid portion 17 that covers the upper opening of the inner tank 15. The lid portion 17 is provided with, for example, three through holes 18a, 18b, and 18c, and the holes 18a, 18b, and 18c are detachably closed by plugs 19a, 19b, and 19c. The central hole 18 a is positioned substantially in line with the oil passage hole 21 of the partition plate 20. The reason is that the vacuum hose 50 for sucking the sediment settled on the bottom portion 13 of the lower chamber 14 and the residual waste liquid passes through the oil passage hole 21 of the partition plate 20 from the central hole portion 18 a of the lid portion 17. This is for easy insertion into the bottom 13 of the lower chamber 14. The other holes 18b and 18c can be used, for example, for inserting a high-pressure washing nozzle into the tank 11 when the inside of the tank 11 is subjected to high-pressure washing.

  In the grease trap 10 of the present embodiment as well, a pipe for guiding a vacuum hose, for example, can be provided in the central hole portion 18a of the lid portion 17 as in Patent Document 1. However, when high-pressure cleaning is performed using the other holes 18b and 18c, if such a pipe is provided, the high-pressure cleaning nozzle 60 hits the pipe and the workability deteriorates. Therefore, it is preferable not to provide such a guide pipe in this embodiment.

Next, the operation of the grease trap 10 according to the embodiment of the present invention will be described.
As shown in FIGS. 4 (A) and 4 (B), the waste liquid flowing in the upstream sewage pipe is moved downward from the upper side of the tank 11 to the lower chamber 14 by the inlet channel pipe 31 of the grease trap 10. Poured. The sediment in the waste liquid settles in the lower chamber 14 and is accumulated almost at the center of the cross section by the bottom portion 13 inclined downward. On the other hand, the floating oil and fat in the waste liquid separates and rises and accumulates in the upper chamber 16 through the oil and oil passage hole 21 at the center of the cross section by the partition plate 20 inclined upward. In addition, since the partition plate 20 is inclined upward, the floating oil and fat is prevented from flowing back to the lower chamber 14.

  As a result, the waste liquid that has flowed into the tank 11 becomes treated water from which precipitates and oils and fats have been separated when passing through the lower chamber 14. The treated water flows upward from the lower chamber 14 through the outlet channel pipe 32 and is discharged from the upper side of the tank 11 to the outer downstream sewage pipe. Therefore, since the waste liquid flowing in the lower chamber 14 does not directly contact the already separated oil and fat, the oil and fat is not affected by the temperature change of the waste liquid that flows later. Therefore, the situation where the already separated oil and fat is mixed with the treated water and flows to the external sewer pipe is avoided.

  Next, a method for cleaning the tank 11 in the grease trap 10 according to the embodiment of the present invention will be described. The method of cleaning the tank 11 in the grease trap 10 includes a first vacuum setting step, an oil and fat recovery step, a second vacuum setting step, and a sediment / residual waste liquid recovery step. In addition, a setting process of a high-pressure washing nozzle and a washing water recovery process can be included.

  In the first vacuum setting step, as shown in FIG. 5A, a vacuum hose 50 of a vacuum car as a collecting means is connected to one hole portion of the lid portion 17 of the tank 11, which is the central hole portion 18a in this embodiment. To the oil in the upper chamber 16. At this time, the upstream sewage pipe is blocked so that the waste liquid does not flow into the inlet channel pipe 31.

  As shown in FIG. 5 (B), the oil and fat collecting step sucks and collects the waste liquid containing the oil and fat collected in the upper chamber 16 by the vacuum hose 50 described above. When the waste liquid decreases and the oil passage hole 21 of the partition plate 20 appears, the process proceeds to the next second vacuum setting step.

  In the second vacuum setting step, as shown in FIG. 6A, the vacuum hose 50 is inserted into the bottom 13 of the lower chamber 14 through the oil passage hole 21 of the partition plate 20. Since the oil passage hole 21 of the partition plate 20 appears by reducing the waste liquid, the vacuum hose 50 can be easily and quickly inserted into the oil passage hole 21.

  In the sediment / residual waste liquid recovery step, the sediment and the residual waste liquid that have settled to the bottom 13 of the lower chamber 14 are sucked by the vacuum hose 50 as shown in FIG. Further, the waste liquid collected on the partition plate 20 passes through the waste liquid passage hole 22 and sucks and collects the waste liquid that has flowed down to the bottom 13 of the lower chamber 14.

  In particular, since the waste liquid passage hole 22 is formed at a low position with a difference in height at the boundary between the partition plate 20 and the inner surface of the upper chamber 16, the waste liquid near the boundary does not remain, and FIG. 1 and FIG. It flows smoothly toward the waste liquid passage hole 22 along the boundary as indicated by the arrow shown in FIG.

  As described above, in the grease trap 10 according to the embodiment of the present invention, the vacuum hose 50 is inserted into the hole 18a in the center of the lid portion 17 to suck the oil and fat in the upper chamber 16, and then the vacuum hose 50 is Without being extracted from the central hole 18a, it can be quickly inserted into the bottom 13 of the lower chamber 14 from the oil / fat passage hole 21 of the partition plate 20 as it is. That is, unlike the conventional grease trap of Patent Document 1, it is not necessary to replace the vacuum hose 50 with the other hole portion 18b of the lid portion 17, so that the time can be reduced.

  Further, the vacuum hose 50 sucks sediment and residual waste liquid in the lower chamber 14. During the suction, all the waste liquid near the boundary between the partition plate 20 and the inner surface of the upper chamber 16 also flows down from the waste liquid passage hole 22 to the lower chamber 14. As a result, the sludge in the tank 11 can be collected in a shorter time than the conventional grease trap of Patent Document 1. Further, since the waste liquid does not remain in the vicinity of the boundary between the partition plate 20 and the inner surface of the upper chamber 16, problems such as bad odor generation and hygiene can be solved.

Since the cleaning time of one grease trap 10 can be shortened, the cleaning cost can be greatly reduced when the number of installed grease traps 10 is increased.
According to the present embodiment, by inserting the vacuum hose 50 into the lower chamber 14 and sucking it, the waste liquid on the partition plate 20 flows down to the lower chamber 14 through the waste liquid passage hole 22. Therefore, when sucking with the vacuum hose 50, not only the operation of inserting into the lower chamber 14 after sucking the waste liquid containing the oil and fat in the upper chamber 16 after being inserted into the upper chamber 16 as described above, The vacuum hose 50 can be inserted into the lower chamber 14 through the oil / fat passage hole 21 and sucked from the beginning of the suction operation without first draining the waste liquid in the chamber 16. Even when the waste liquid in the upper chamber 16 is extracted from the waste liquid in the lower chamber 14 without first extracting the waste liquid in the upper chamber 16, the waste liquid in the upper chamber 16 flows down into the lower chamber 14 through the waste liquid passage hole 22. Can be aspirated. In this way, since the vacuum hose 50 has only to be inserted into the lower chamber 14 at once, the work can be further facilitated and the work time can be shortened. However, since waste liquid containing fats and oils is stored in the upper chamber 16, it may be difficult to perform the work of inserting the vacuum hose 50 through the fat passage hole 21 to the lower chamber 14 before removing them. By attaching a rod-like member or the like near the tip of the vacuum hose 50 and inserting it almost straight into the hole 18a in the center of the lid portion 17, the oil passage hole 21 can be passed through relatively easily.

  Next, a cleaning method using high pressure cleaning will be described. In the setting process of the high pressure cleaning nozzle, as shown in FIG. 7A, the high pressure cleaning nozzle 60 is inserted into the upper chamber 16 in the tank 11 from the other hole portion 18b of the lid portion 17. At that time, the vacuum hose 50 is pulled up to stand by in the upper part of the upper chamber 16, or is pulled out from the central hole 18a.

  In the high pressure cleaning step, the inside of the tank 11 is cleaned by jetting high pressure cleaning water from the high pressure cleaning nozzle 60. At that time, since the vacuum hose 50 does not get in the way, the high pressure washing nozzle 60 can be freely moved in the tank 11 as shown by an arrow in FIG. Can be washed.

  In addition, the high pressure washing nozzle 60 is provided in the front-end | tip part of the hose 62 for high pressure to which the nozzle base 61 pumps high pressure washing water as an example. The nozzle base 61 is rotatably provided with two injection nozzles 63 that inject high-pressure washing water in opposite directions. The two injection nozzles 63 and the nozzle base 61 can clean the entire surface of the tank 11 at high speed by rotating three-dimensionally using the pressure of the high-pressure cleaning water as a drive source.

  The high-pressure washing water flows down along the inner surface of the upper chamber 16 and does not remain near the boundary between the partition plate 20 and the inner surface of the upper chamber 16, and the boundary as shown by the arrows shown in FIGS. 1 and 7A. And smoothly flows toward the waste liquid passage hole 22. Furthermore, it flows down from the waste liquid passage hole 22 to the bottom 13 of the lower chamber 14 and accumulates.

  In the washing water recovery step, as shown in FIG. 7B, the vacuum hose 50 is inserted into the bottom 13 of the lower chamber 14 through the oil / fat passage hole 21 of the partition plate 20. With the vacuum hose 50, the washing water that has flowed to the bottom 13 of the lower chamber 14 is sucked and collected.

  As described above, the high pressure washing nozzle 60 can be freely moved in the upper chamber 16 of the tank 11, so that the inside of the upper chamber 16 can be washed in a short time by jetting high pressure washing water. The washing water after the washing also flows down from the waste liquid passage hole 22 to the lower chamber 14 without remaining in the vicinity of the boundary between the partition plate 20 and the inner surface of the upper chamber 16, and can be efficiently collected in a short time by the vacuum hose 50.

DESCRIPTION OF SYMBOLS 10 Grease trap 11 Tank 12 Outer tank 13 Bottom part 14 Lower chamber 15 Inner tank 16 Upper chamber 17 Cover part 18a, 18b, 18c Hole part 19a, 19b, 19c Plug 20 Partition board 21 Oil passage hole 22 Waste liquid passage hole 31 Inlet flow path Pipe (inlet channel)
32 Outlet channel pipe (outlet channel)
50 Vacuum hose 60 High pressure cleaning nozzle 61 Nozzle base 62 High pressure hose 63 Injection nozzle

Claims (3)

A tank having a bottom portion that is inclined downward, a partition plate that is inclined upward to divide the tank into an upper chamber and a lower chamber, and an oil that is located above the partition plate and separated from the waste liquid in the lower chamber For passing oil into the upper chamber, an inlet passage for flowing waste liquid from the outside of the tank to the lower chamber, and for discharging treated water from which the oil and fat has been separated to the outside of the tank An outlet channel, a lid portion that covers the upper portion of the tank and has one or more holes, and a height difference in which waste liquid on the partition plate flows at the boundary between the partition plate and the inner surface of the tank are provided. And a cleaning method for cleaning a tank of a grease trap provided with a waste liquid passage hole provided on the partition plate at a position where the height difference is low so that waste liquid on the partition plate can pass to the lower chamber,
A vacuum hose is inserted into the upper chamber from one hole of the lid, and the waste liquid containing the oil and fat collected in the upper chamber is sucked, and then the vacuum hose is connected to the oil passage hole of the partition plate. Is inserted into the lower chamber and sucks waste liquid containing sediment that has settled in the lower chamber, and sucks waste liquid on the partition plate that flows into the lower chamber through the waste liquid passage hole. A method for cleaning a tank in a grease trap, comprising the step of collecting. A tank having a bottom portion that is inclined downward, a partition plate that is inclined upward to divide the tank into an upper chamber and a lower chamber, and an oil that is located above the partition plate and separated from the waste liquid in the lower chamber For passing oil into the upper chamber, an inlet passage for flowing waste liquid from the outside of the tank to the lower chamber, and for discharging treated water from which the oil and fat has been separated to the outside of the tank An outlet channel, a lid portion that covers the upper portion of the tank and has one or more holes, and a height difference in which waste liquid on the partition plate flows at the boundary between the partition plate and the inner surface of the tank are provided. And a cleaning method for cleaning a tank of a grease trap provided with a waste liquid passage hole provided on the partition plate at a position where the height difference is low so that waste liquid on the partition plate can pass to the lower chamber,
A vacuum hose is inserted into the upper chamber through one hole of the lid, and further inserted into the bottom of the lower chamber through the oil passage hole of the partition plate. Thereafter, the vacuum hose And a step of sucking the waste liquid containing sediment settled in the lower chamber, and sucking and collecting the waste liquid flowing from the partition plate to the lower chamber through the waste liquid passage hole. How to clean a tank in a grease trap. A high-pressure washing nozzle is inserted into the upper chamber in the tank from the other hole of the lid, and the inside of the tank is washed by spraying high-pressure washing water from the high-pressure washing nozzle, and the waste liquid passes through the upper chamber. The method for cleaning a tank in a grease trap according to claim 1 or 2, further comprising a step of sucking and collecting the cleaning water that has passed through the hole and has flowed to the bottom of the lower chamber by the vacuum hose.

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