JPH11221402A - Grease trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grease trap which can eliminate a time required for maintenance and management of the trap and can maintain the surroundings sanitarily, by filtering oil or the like, mixed in waste water from a kitchen or a scullery through a damped paper sheet, efficiently separating the oil or the like from the waste water, and making the amount of the waste water staying in the grease trap as small as possible. SOLUTION: Floats 7 are attached to the bottom of a basket-like member, which is fitted and inserted in a section, formed in a grease trap main body 1, to be freely inserted or detached, and are made to float on waste water staying at the bottom of the grease trap, and a filter 8, which has been subjected to hydrophilization treatment after combing its fiber to be made papery, is installed in the basket-like member. After damping the filter 8, the waste water is treated to repel only oil in the waste water and to pass water in it through the filter 8, and then the treated waste water is drained to a sewage ditch. By floating the basket-like member, in which the filter 8 is installed, on water staying at the bottom of the grease trap, the oil and water separated from the waste water can be prevented from bringing into contact with each other, and the staying water can be prevented from rotting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kitchen in a cafeteria, particularly a cafeteria for providing Western or Chinese cuisine, and furthermore, cooking wastewater discharged from a kitchen sink, washing water for used tableware or cooking waste. The present invention relates to a pretreatment device for passing wastewater, such as juice, in which oil (animal or vegetable oil) is mixed in wastewater into a sewer.

[0002]

2. Description of the Related Art There is a chance that oil such as vegetable oil and vegetable oil is mixed into waste water such as cooking waste water discharged from a kitchen of a cafeteria that provides Western food or Chinese food, washing water of used tableware or cooking residue. Wastewater from many kitchens must be treated once through a grease trap before it can be drained into a sewer. Although it depends on the amount of wastewater used, conventionally, the structure of the grease trap is such that a plurality of partition frames are provided in parallel in the longitudinal direction inside the vertically long rectangular container with a shallow bottom, and the inside of the container is Along with dividing into a plurality of sections, the partition frame is provided with a communication hole at a position adjacent to the container bottom of the frame, and the wastewater from the kitchen is poured into the first section of the vertical container,
Generally, the treatment is performed through the inflow wastewater for each section, and the treatment wastewater is caused to flow to the sewage drain via the rearmost section of the container.

That is, wastewater (mixed with juice, washing water for food and vegetable waste, etc.) mixed with oil and the like discharged from a cooking place flows into the first compartment of the grease trap, and the wastewater is discharged to the compartment. While flowing into the second partition, the water flows into the second partition through a communication hole provided below the first partition frame constituting the first partition. At this time, the level of the retained wastewater is provided in the first partition frame. If the height of the partition is higher than the upper edge of the communication hole, the partition frame blocks oil or the like floating on the wastewater surface, and only water flows into the second section through the communication hole.

If the level of the wastewater staying in the second compartment is higher than the upper edge of the communication hole provided in the second partition frame,
The partition frame blocks the oil mixed in the wastewater staying in the second section and separates the oil floating on the surface of the water, and flows only the water into the third section through the communication hole. By repeating the above-described steps in a plurality of sections, the wastewater is dropped into the sewer with the oil and the like originally contained in the wastewater almost removed. Thus,
Oil separated from the wastewater (trap) and accumulated in each section is scooped up from the wastewater surface of each section at regular intervals and removed, and the grease strap is maintained and sanitized to withstand long-term use. I have.

[0005] According to the above conventional method, the level of wastewater staying in the grease trap is always
The trap does not function well unless it is positioned higher than the upper edge of the communication hole of the partition frame provided in the trap. That is, the water level of the overflow provided in the last section is higher than the upper edge of the communication hole of each partition frame. The grease strap prevents the waste water from overflowing,
Since the communication holes provided in each partition frame are required to allow a certain flow rate, the opening area cannot be reduced, and together with the above conditions, the inside of the grease strap is always in the grease strap. A certain amount of wastewater has accumulated.

[0006] By the way, the place where the grease strap is placed is usually a warm place such as a cooking place or a dishwashing place. Therefore, the wastewater staying in the grease trap rots in a relatively short period of time, causing turbidity and generating offensive odor. Of course, new wastewater flows into the grease trap sequentially and is diluted, but the effect is small, and the lack of sanitation in places causes a headache for those concerned. For this reason, apart from the oil content, or at the same time, at regular intervals, it is necessary to dredge the putrefactive wastewater remaining in the grease trap with a ladle and clean the inside of the trap with fresh water, but this is not sanitary. No, the stench is also very strong.

[0007]

Accordingly, the present invention is directed to:
Minimize wastewater staying in the trap,
Efficient separation of oil and other components mixed in wastewater, and extremely easy and sanitary treatment
An object of the present invention is to provide a grease strap that does not require the above cleaning for a long period of time and can perform cleaning in a hygienic manner.

[0008]

SUMMARY OF THE INVENTION The present invention utilizes a material obtained by wetting coarse fibers which are combed or woven (knitted) into a sheet, and which is transparent to water but blocks oil. ,
Once the wastewater mixed with oil and the like is thrown into the fiber bag-like container wet with water, the material functions as a grease trap, and it is intended to remove the oil mixed with the waste liquid. The detailed configuration is as follows.

(1) A grease strap having a drain hole provided in the vicinity of the bottom of a container having an opening on the upper side so that treated wastewater poured into the container and treated is dropped into a sewer. The bottom is filled with shallow stagnant water having a depth defined by the drainage level, and a bag-like shape formed by combing hydrophilic fibers into a sheet between the garbage basket fitted to the opening and the inside of the container. The filter can be inserted and removed freely,
A grease strap comprising at least a part of the grease strap soaked in the stagnant water. (2) A grease strap having a drain hole provided in the vicinity of the bottom of a container having an opening on the upper side so that treated wastewater poured into the container and treated is dropped into a sewer. A basin-like container with a shallow stagnant water having a shallow water depth defined by a drainage level, having an outer shape fitted on the stagnant water surface in the container and slidable in the vertical direction, and having a float attached to the bottom is provided. A bag-like filter formed by combing a hydrophilic fiber into a sheet into a water-floating, cage-like container inside the sheet-like shape is detachable, and at least a part of the bag-like filter is attached so as to be immersed in the stagnant water. Grease strap.

(3) A partition frame is provided on the inner side of a vertically long rectangular container having a shallow bottom to divide the container into a plurality of sections, and a communication hole is provided at a position close to the bottom of the container with respect to the partition frame. A grease trap, wherein wastewater from a cooking place is poured into a first compartment, and treated wastewater is dropped into a sewer through a last compartment of a container through inflow wastewater for each of the compartments. Has a profile that is filled with stagnant water having a shallow depth defined by the drainage level provided in the last section, is fitted in at least the first section, and is slidable in the vertical direction, and a float is attached to the bottom. The basket-like container is made to land and float on the staying water surface, and a bag-like filter formed by combing hydrophilic fibers into a sheet inside the basket-like container is detachable, and at least a part of the bag-like filter is retained water. That was soaked in Grease strap consisting of

[0011]

[Operation] It is assumed that wastewater is accumulated at the bottom of the grease trap to a depth of the wastewater level. The basket-shaped container inserted in the compartment floats in the stagnant water by the float provided on the bottom, but the bag-like filter made of hydrophilic fibers combed into a sheet mounted in the basket-shaped container has a bottom surface. A part is immersed in the stagnant water, sucking up moisture by capillary action and moist to the upper side. In short, not allowing the oil to seep into the filter when the filter is dry makes the filtering operation efficient. The filter material has appropriate pores made of water-wetted fibers, and the filter made of the material wetted with water has the property of allowing water to pass through the pores but repelling oil. Therefore, depending on the thickness of the material, if the pores are too coarse, the oil permeability increases, and if it is too fine, the filtration efficiency of water decreases. In addition, it is easily clogged and has a short life. In this regard, simple experimentation has shown that the filter resistance of a new filter material is almost negligible if the wastewater is of the usual degree of soiling. Wastewater (mixed with juice, washing water for food and vegetable waste, etc.) mixed with oil (animal and vegetable oil) discharged from the cooking place flows into the first section of the grease trap. It accumulates in the filter in the basket-shaped container inserted in the compartment, and the oil content and foreign matter are repelled by the filter wet with water and remain in the basket-shaped container.
It flows down from the communication hole into the second compartment.

Although related to the amount of wastewater, the basket in the first compartment receives wastewater from the kitchen and sinks,
When wastewater larger than the filtration capacity is received, it overflows, and the wastewater flows into the filter in the basket-like container inserted in the next section. Even in the second section,
It has the same effect as described above, and the filtered water
It flows down into the third compartment from the communication hole of the compartment. The basket with a filter filters the wastewater based on the head difference between the level of the wastewater received in the filter and the level of the stagnant water.At this time, the oil contained in the wastewater is repelled and held on the inner surface of the filter, Permeate only water to the outside. The basket-like container in the compartment floats on the stagnant treated water by the float provided at the bottom as the wastewater stagnating in the filter is filtered. That is, the basket-shaped container always holds a head required for filtering wastewater.

When the amount of oil or the like accumulated in the filter exceeds a predetermined amount, or when the function of filtering the water is reduced and the function of the filter is deteriorated, the entire container is taken out and the oil is removed together with the filter. Then, since the cage-like container equipped with the new filter may be inserted into the old section of the grease strap, the maintenance is sanitary and simple. Cleaning of the accumulated water at the bottom of the grease trap is sometimes required, but the amount is small and it is replaced with fresh water constantly, so it is slow to rot and easy to treat. If the level of the upper edge of the communication hole drilled in each section is set lower than the level of the stagnant water, even if the wastewater overflows from the filter medium and flows into each section, the oil mixed with the wastewater Is drained at the partition wall and does not flow to the drain trap.

Embodiment

Hereinafter, one of the preferred embodiments of the present invention will be described. Among the requirements constituting the present invention, a member that can be appropriately deformed within the technical level in the industry at the time of filing the present application. In view of the above, the technical scope of the invention should not be interpreted based only on specific examples of the present embodiment. FIG. 1 is a side sectional view of one embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA, and FIG. 3 is another example of the drain trap.

In FIG. 1, a main body 1 of a grease strap is shown.
Is a vertically long, water-tight rectangular container having a shallow bottom formed by molding a synthetic resin material, a fiber-reinforced synthetic resin material, a metal plate, and the like. And a communication hole 3 is formed in each partition frame 2 at a position close to the bottom surface of the main body, so that the accumulated water from the first section 4 to the last section n is at the same level. In the final section, a drain trap 5 is installed and connected to the sewer, based on which the level of the retained water at the bottom of the grease trap is regulated and the airtightness between the sewer and the sewer is maintained. Each of the compartments has the same shape, and in the first compartment 4 is fitted a rectangular basket-shaped container 6 having an outer shape which is substantially the same and which is slidable up and down within the first compartment with a margin. However, a float 7 is attached to the periphery of the bottom of the basket-shaped container 6, and when there is water remaining at the bottom of the grease trap, the cage 7 is floating in the water.

Referring to FIG. 2, a rectangular basket-like container 6 opening upwards.
A bag-like filter 8 made of a material such as tissue paper, which is formed by combing a hydrophilic fiber into a sheet, is attached to the inside of the container without gaps. And an overflow is formed in a part thereof, and the overflow is formed in the second section 4.
- configured to flow into the _second upper opening of rectangular cage-like container 6-2 _of a box-shaped in the filter 8 _2. When the box-shaped filter 8 is mounted inside the rectangular basket-shaped container 6, at least the bottom part is immersed in the stagnant water, and the material of the filter 8 absorbs moisture by capillary action from the container to wet the entire filter. Thus, even when the filter is installed in the basket-shaped container 6 for the first time, it can be used as it is. Further, even when the grease trap is not used for a long time, there is no danger that the filter 8 exposed on the water surface dries and the grease trap function of the filter is reduced.

The bag-shaped filter 8 in which fibrous material having a high hydrophilicity is combed into a sheet is used even if the filter material is backed and reinforced with a net-like synthetic resin sheet in order to increase the strength or to have a shape-retaining action. Good. Thus, even if a large amount of oil accumulates on the filter, there is no possibility that the filter will be broken at the time of replacement. If the reinforcing material has sufficient strength and it is not difficult to maintain the shape of the filter, it is not impossible to omit the rectangular basket-shaped container 6. The sheet material of the filter 8 must not be soluble in water. Further, in order to protect the filter 8, it is also optional to temporarily receive wastewater from the cooking place in a basket made of coarse mesh, and drain the wastewater after separating wastes in the wastewater to a green strap.

When a large amount of wastewater flows out from the cooking place at one time and the wastewater fills the box-shaped filter 8 of the first basket-shaped container 6 and the container 6 sinks in the stagnant water, the level of the overflow channel of the cage-like container 6, there is a higher than the second cage-like container 6-2 _of filter edges, also, when the first cage-like container 6 is submerged by waste water, wherein overflow channel may also be submerged together by pressing the filter onto the edge of the second cage-like container _6-2. Or, even when sank first cage-like container 6, the overflow channel is configured such that above the filter on the edge of the second cage-like container _6-2. If necessary, the above arrangement is as shown in the vertical positional relationship as it is the second cage-like container 6-2 _of a box-shaped filter 8 ₂ and the third cage-like container.

In the above configuration, the case where the filter capacity of the first basket-shaped container 6 has a large amount of wastewater from the cooking place and cannot be treated at once has been described. In comparison, if the filter capacity (processing capacity) of the first basket-like container 6 is set relatively large, the second and third basket-like containers and filters may become unnecessary. When the waste water flows into the bag-shaped filter 8 of the first basket-shaped container 6, the waste water is filtered by the filter 8 and flows out to the retained water side due to the head difference between the water surface and the retained water surface. At this time, the oil mixed in the wastewater is repelled by the wet filter fibers and remains in the filter, and only the moisture flows through to the bottom of the grease trap and mixes with the conventional stagnant water. Thus, the stagnant water whose level has risen flows out of the drain trap 5 into the sewer.

According to the experimental results, if the wastewater is of such a level that it normally occurs, the filtration resistance of the new filter 8 is almost nil, and the wastewater is instantaneously filtered. It is not. Filter 8
When the filtration function of the filter has deteriorated and the amount of wastewater flowing into the bag-shaped filter 8 does not easily decrease, the basket-shaped container 6 is taken out of the compartment, the filter 8 is discarded together with the oil, and a new filter is inserted. . At this time, a handle 9 can be provided on the container 6 so that the basket-shaped container 6 can be easily taken out.

Referring again to FIG. 1, the drain trap 5 has a drain pipe 10 having an opening toward the bottom of the grease trap.
Is placed through the wall of the body 1 of the trap and close to the bottom surface in the rearmost compartment to define the level of grease trapped water and maintain the airtightness between the drain and the kitchen. In this way, we maintain good environmental hygiene. Drainage pipe 10
The level of the wastewater (here, the water depth) staying at the bottom of the grease strap is set to the minimum necessary by appropriately setting the mounting position of the grease strap. Therefore, the remaining water at the bottom of the grease trap is as small as possible, is sufficiently exchanged by new wastewater, and does not maintain a long residence time long enough to rot.

FIG. 3 shows the configuration of another embodiment of the drain trap 5, and members denoted by the same reference numerals as those shown in FIG. 1 are the same as those described in FIG. In the figure, the opening of the drain pipe 10 is installed facing the inside of the grease strap, and the opening is closed by a butterfly valve 11 attached to a hinge provided at the upper part of the opening edge, and The space is closed airtight. That is,
An arm 12 is attached to the butterfly valve 11 and a float 13 is provided at the end of the arm.Therefore, a moment based on the weight of the float 13 is always applied to the hinge of the butterfly valve 11 so that a moment is applied to the hinge. , Thereby closing valve 11. Since the float 13 floats on the water surface at the bottom of the grease trap, if the water level rises, the float 13 also rises and acts in a direction to open the butterfly valve 11. Therefore, at that time, the stagnant water whose level has been increased can be discharged to the sewer through the drain pipe 10. When the accumulated water level returns to the old level, the butterfly valve 11 closes the opening of the drain pipe 10.

FIG. 4 is a sectional view of another embodiment of the present invention, in which the grease trap body 1 is continuously attached to a drain hole of a sink forming a sink of a cooking chamber. At the bottom of the grease strap main body 1, a drain pipe 10 communicating with the sewer is provided upright, and a cap-shaped member 14 is attached so as to cover the upper opening thereof.
Thereby, the upper edge of the drainage pipe 10 is set to the level of drainage staying at the bottom of the grease trap, and the space between the grease strap 1 and the drain is hermetically sealed.

Reference numeral 15 denotes a bottomed garbage basket that fits inside the grease trap main body 1, and a slight gap exists between its outer diameter and the inner diameter of the grease trap main body 1. The elongate basket-like container 6 having a float 16 attached to the bottom is incorporated in the above-mentioned slight gap, and the opening thereof floats on the drainage remaining at the bottom of the grease strap 1 in a state of receiving the garbage basket 15. Provided. Inside this basket-like container 6,
By attaching the highly hydrophilic fibrous sheet filter 8 described above, the oil component in the wastewater discharged from the sink is captured, and the oil component is prevented from flowing into the sewer.

When the wastewater is discharged from the sink into the bottomed garbage basket 15, large-size dust and debris are separated from the wastewater by the garbage basket 15, and the oil-containing wastewater flows into the filter 8, and Although the container 6 is submerged in the stagnant water, it floats up as the filtration proceeds to secure a head between the wastewater level and the stagnant water, so that the drainage can be efficiently filtered. Also,
Since large-sized dust and debris do not directly clog the filter 8, the life of the filter is long and there is no risk of breakage. When the function of the filter 8 is reduced, the bottomed garbage basket 15 and the vertically long basket-like container 6 are removed from the grease trap body 1.
And the filter 8 mounted in the basket 6
Can be exchanged for a new one.

As described above, the filter 8 can be reinforced by using a synthetic resin material or the like. If the shape retention strength is appropriate, and if the use condition is not hard, the filter 8 is greeted with a grease. The vertically long basket-shaped container 6 can be omitted to be mounted on the trap body 1. At that time, if the bottom of the filter 8 is directly mounted on the upper surface of the cap-shaped member 14 and a part of the filter 8 is mounted so as to be immersed in the stagnant water, it is not always necessary to equip the float 16. . The operation and effect of this embodiment are the same as those described in the previous embodiment. The characteristics of the filter, which is a part of the configuration of the present embodiment, is that the oil component is filtered and separated from the liquid mixed with the oil component. Can also be used to separate

[0027]

As described above, according to the present invention, wastewater staying in a grease trap is reduced as much as possible, oils and the like mixed in the wastewater are efficiently separated, and the treatment thereof is extremely simple and sanitary. The above-mentioned cleaning is not required for a long period of time, and the cleaning can be performed hygienically.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a grease strap according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 shows a schematic side view of another embodiment of the drain trap of the present invention.

FIG. 4 shows a side sectional view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grease strap main body 2 Partition frame 3 Communication hole 4 1st section 5 Drain trap 6 Basket-shaped container 7,13,16 float 8 Filter 9 Handle 10 Drain pipe 11 Butterfly valve cap-shaped member 12 Arm 14 Cap-shaped member 15 Garbage basket.

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[Procedure amendment]

[Submission date] March 4, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023] Figure 4 shows a cross-sectional view of another embodiment of the present invention, in the figure, green strap body 1 is mounted in succession in the drainage hole of the sink to form a sink of the cooking chamber. At the bottom of the grease strap main body 1, a drain pipe 10 communicating with the sewer is provided upright, and a cap-shaped member 14 is attached so as to cover the upper opening thereof.
Thus, while the level of waste water staying the upper edge of the drain pipe 10 to the grease trap bottom seals between the grease trap body 1 and the sewer airtight. What
Oh, the bottom of this type of grease strap body
If the drain pipe 10 is mounted sideways in close proximity to
A structure equivalent to the cap-shaped member is placed on the trap
To increase the depth of the grease strap body
Simplifies the shape of the bottom of filters and baskets described below
Can be in any shape.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

[0024] 15 is a bottomed dust cage that fits inside the grease trap body 1, between the outer diameter and the grease trap body 1 having an inner diameter, a slight gap is present. The elongate basket-like container 6 with the float 16 attached to the bottom is incorporated into the above-mentioned slight gap, and the opening thereof is placed on the drainage that stays at the bottom of the grease trap body 1 in a state of receiving the garbage basket 15. It is provided floating. Inside this basket-like container 6,
By attaching the highly hydrophilic fibrous sheet filter 8 described above, the oil component in the wastewater discharged from the sink is captured, and the oil component is prevented from flowing into the sewer.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

When the wastewater is discharged from the sink into the bottomed garbage basket 15, large-size dust and debris are separated from the wastewater by the garbage basket 15, and the oil-containing wastewater flows into the filter 8, and Although the container 6 is submerged in the stagnant water, it floats up as the filtration proceeds to secure a head between the wastewater level and the stagnant water, so that the drainage can be efficiently filtered. Also,
Since large-sized dust and debris do not directly clog the filter 8, the life of the filter is long and there is no risk of breakage. When the function of the filter 8 is decreased, the grease tiger <br/>-up body 1, taken out and cage-like container 6 having a bottom of the dust cage 15 and縱長, there are attached to the cage-like container 6 The filter 8 can be replaced with a new one.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026] The filter 8 can reinforce utilizing such as synthetic resin material mentioned above, if the shape-retaining strength appropriate, also be used state is not hard, green strike the filter 8 The vertically long basket-shaped container 6 can be omitted to be mounted on the wrap body 1. In that case, the bottom of the filter 8 is directly placed on the upper surface of the cap-shaped member 14,
Further, if a part of the filter 8 is mounted so as to be immersed in the stagnant water, it is not always necessary to equip the float 16.
The operation and effect of this embodiment are the same as those described in the previous embodiment. The characteristics of the filter, which is a part of the configuration of the present embodiment, is to filter and separate the oil from the oil-mixed liquid. It can also be used to separate.

Claims (3)

[Claims] 1. A grease trap, wherein a drain hole is provided in the vicinity of the bottom of a container having an opening on the upper side so that treated wastewater poured into the container and treated is dropped into a sewer. A bag-like filter formed by filling hydrophilic fibers into a sheet between the garbage basket fitted in the opening and the inside of the container while filling the shallow stagnant water having a water depth defined by the drainage level. A grease strap, which is detachably inserted and at least a part of which is immersed in the stagnant water. 2. A grease trap, wherein a drain hole is provided adjacent to the bottom of a container having an opening on the upper side, and treated wastewater poured into the container and treated is dropped into a sewer. A cage-like container which is filled with stagnant water having a shallow depth defined by a drainage level, has an outer shape fitted on the stagnant water surface and slidable in a vertical direction, and a float attached to a bottom portion. And a bag-like filter formed by combing hydrophilic fibers into a sheet is detachably inserted inside the basket-like container, and at least a part of the filter is attached so as to be immersed in the stagnant water. A grease strap characterized by: 3. A container having a shallow bottom in a vertically long rectangular container, a partition frame is provided inside the container to divide the container into a plurality of sections, and a communication hole is provided at a position close to a bottom of the container with respect to the partition frame. A grease trap, wherein wastewater from a cooking place is poured into one section, and treated wastewater is dropped into a sewer through the last section of the container through the inflow wastewater for each section. Fills with shallow stagnant water at the depth specified by the drainage level provided in the last section,
A basket-like container having an outer shape capable of fitting in at least the first compartment and slidable in the vertical direction, and having a float attached to the bottom is allowed to land and float on the stagnant water surface, and the inside of the basket-like container is hydrophilic. A grease strap, characterized in that a bag-shaped filter formed by combing fibers having a shape into a sheet is detachable, and is attached so that at least a part thereof is immersed in the staying water.