JPH0632162Y2 - Waste oil container - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention separates waste oil collected in a container into oil-water by the difference in specific gravity of oil and water, discharges the water from the container, and stores the oil in the container. Related to the improvement of the waste oil container.

(Prior Art) As a waste oil recovery device, a skimmer method disclosed in Japanese Utility Model Laid-Open No. 60-49992, that is, oil floated and separated in a storage tank is collected by a masky outside the storage tank and separated water is stored in the storage tank There are a type that discharges the oil to the outside and a type that waste oil collected in the container is separated into oil and water by a specific gravity difference, and only the water is discharged and the oil is stored as it is in the container (hereinafter referred to as an oil storage method).

The present invention is directed to the oil storage method,
In the conventional example, as shown in FIG. 4, the waste oil collected in the container 1 from the waste oil inflow hole 2 is separated into oil and water by the difference in specific gravity, and the water separated by sedimentation is located near the bottom of the container body 1. The oil that has been drained from the drain valve 12 ′ provided and thus floated and separated is stored in the container body 1.

A liquid level gauge 16 is provided to monitor the amount of waste oil collected from the waste oil inflow hole 2 so as not to overflow. Reference numeral 4 is an opening / closing lid, and 3 is a ventilation hole.

Further, in the conventional example shown in FIG. 5, the inside of the container body 1 is partitioned by a partition wall 17 to form a drainage channel 18, and a drainage valve 12 ′ is provided above the drainage channel 18.

In the oil / water separation using this waste oil container, the waste oil entering the container body 1 from the waste oil inflow hole 2 is oil / water separated due to the difference in specific gravity, and the settled water underflows the lower end of the partition wall 17 into the drainage channel 18. It enters and is drained from the drain valve 12 '.

Due to this drainage, oil is stored and recovered in the container body 1. A liquid level gauge 16 monitors the liquid level in the container body 1 to prevent the liquid from overflowing as described above. Reference numeral 3 is a ventilation hole, and 4 is an opening / closing lid.

(Problems to be Solved by the Invention) The conventional waste oil container shown in FIG. 4 has the following drawbacks. That is, since the drain valve 12 'is only provided near the bottom of the container 1, oil is also discharged from the drain valve 12' when the oil-water separation of the waste oil in the container 1 is not sufficiently performed. Will end up.
As a result, a large amount of oil remains in the wastewater discharged from the drain valve 12 ', and the wastewater cannot be discharged as it is due to pollution.

Therefore, it is necessary to discharge the oil after a long rest time or to remove the oil content in the drainage again and drain the water, which causes a problem that a great amount of time and labor is spent. On the other hand, since water remains in the oil stored and collected in the container body 1, it is necessary to remove this water when reusing this oil, which requires a lot of labor and cost. There is.

In the conventional example shown in FIG. 5, since the drainage channel 18 is formed by partitioning with the partition wall 17, oil is not mixed into the drainage, but the drainage valve 12 'is provided above, so that There is a problem.

That is, in order to drain water from the drain valve 12 ', the condition is that the liquid level L in the container body 1 is maintained at a position higher than the drain valve 12'. Therefore, in order to maintain the liquid level L, it is necessary to flow the waste oil through the waste oil inflow hole 2 to maintain a constant liquid level, and when the oil is stored and recovered in the container body 1 at the final stage. Is
Since the inflow of the waste oil is stopped, water cannot be drained while being accumulated in the drainage channel 18, and the oil collected and stored in the container body 1 has the water and the liquid level L accumulated in the drainage channel 18. In order to maintain the above, the waste oil inflow hole 2 flows in, and water that has not yet been separated into oil and water is mixed, and the ratio of oil to the total volume of water (hereinafter referred to as the oil recovery rate) decreases, and the storage recovery There is a problem that what has been done cannot be reused as it is.

The present invention provides a waste oil container having a simple structure and improving the oil recovery rate.

(Means for Solving the Problems) The means for solving the above problems is to separate water and oil in the container body by the difference in specific gravity and discharge the water accumulated in the lower layer to remove the oil content from the container body. In a waste oil container that is configured to be stored and recovered in the container, the inside of the container body is partitioned by a partition wall to be divided into a primary oil water separation chamber and a secondary oil water separation chamber,
The secondary oil-water separation chamber is partitioned into a plurality of chambers in the width direction of the partition wall by a partition plate made of a perforated plate that allows only water to pass through, and the plurality of partitioned chambers are partitioned so that they communicate with each other at the bottom. A gap is provided between the lower end of the wall and the bottom of the secondary oil / water separation chamber to form a communication passage, and a drain valve is provided on one side of the secondary separation chamber and is located on the opposite side of the drain valve. The partition wall is provided with an openable / closable communication hole through which the primary oil / water separation chamber and the secondary oil / water separation chamber communicate with each other at the bottom.

(Operation) Since the present invention is constructed in this way, it has the following operations. That is, the inside of the container body is partitioned by a partition to divide it into a primary oil / water separation chamber and a secondary oil / water separation chamber, and an opening / closing communication hole through which the primary oil / water separation chamber and the secondary oil / water separation chamber communicate with each other is provided at the partition wall. Since the waste oil put into the primary oil / water separation chamber in the primary oil / water separation chamber is previously separated into oil / water by closing the communication hole, the communication hole is opened and stored in the lower layer of the primary oil / water separation chamber. A partition plate that allows water to flow into the secondary oil-water separation chamber and has a kind of sealing effect on oil to prevent the oil from flowing into the next chamber that divides the secondary oil-water separation chamber with a partition plate. It is possible to sequentially replace the chambers partitioned by with oil.

Further, in the organic relationship between the water and a kind of sealing effect against oil, a plurality of partition walls made of a perforated plate capable of passing only water in the secondary oil-water separation chamber are provided in the width direction of the partition wall. Since it is divided into chambers, by preventing the oil from flowing into the next partitioned chamber due to a kind of sealing effect of water, only water will pass through the partition plate and sequentially into the next partitioned chamber. It flows, which makes it possible to efficiently replace the chamber partitioned by the partition plate with oil.

And since a communication passage is formed by providing a gap between the lower end of the partition wall and the bottom of the secondary oil / water separation chamber so that each of the plurality of partitioned chambers communicates at the bottom, the chambers partitioned by the partition plate are formed. When the oil is replaced with oil, the water in the gap that was sealed by the water sealing effect until it is replaced disappears and is filled with oil. When the next partitioned chamber is replaced with oil, it becomes possible to replace the successively partitioned chambers with oil through the gap to the next partitioned chamber.

A drain valve is provided on one side of the secondary separation chamber, and an openable and closable communication hole is provided on the opposite side of the drain valve to communicate the primary oil / water separation chamber and the secondary oil / water separation chamber at the bottom. Since it is provided on the partition wall, when the oil in the partitioned chamber is replaced with oil, it becomes possible to cause the water passing through the partition plate to flow from the communication hole side to the drain valve side, and at the same time to the oil in the partitioned chamber. It becomes possible to sequentially replace the first partitioned chamber on the communication hole side to the final partitioned chamber on the drain valve side,
Only the water can be drained from the drain valve, and the oil recovery rate can be improved.

(Embodiment) An embodiment of the present invention will be described below. In FIG. 1 and FIG. 2, 1 is a container body, and the inside of this container body 1 is divided by a partition wall 10 into a primary oil / water separation chamber 13
And a secondary oil / water separation chamber 14. The volume ratio between the primary oil / water separation chamber 13 and the secondary oil / water separation chamber 14 varies depending on the mixing ratio of waste oil and water. The separation chamber 14 is 1.

The inside of the secondary oil / water separation chamber 14 is divided into a plurality of chambers in the width direction of the partition wall 10 by the partition plate 5, and the lower end of the partition plate 5 is located at a predetermined distance from the bottom of the container body 1 (secondary oil / water separation chamber 14). The communication passages are separated from each other by the size and communicate with each other at the bottom of each chamber partitioned by the partition wall 10. The partition plate 5 is made of a perforated plate having a large number of holes formed therein so that only water can pass through. If one example is shown, the diameter of the hole opened in the partition plate 5 is 1 to 2 mm, and the viscosity is such that oil does not pass through this hole and only water can flow.

Reference numeral 11 is a communication hole for communicating the primary oil / water separation chamber 13 and the secondary oil / water separation chamber 14, and a partition wall near the bottom of the container body 1.
It is provided at one end of 10. The communication hole 11 is provided with an opening / closing plate (not shown).

A connection pipe 9 is provided on the inner wall of the container body 1 on the side opposite to the position where the communication hole 11 is provided. That is, the communication hole 11 is opened in the lower part of the first chamber designed by the partition plate 5, and the connecting pipe 9 is provided in the last chamber partitioned by the partition plate 5.

As shown in Fig. 3, the suction pipe 6 is provided at the lower end of the connecting pipe 9, and the lower end thereof has a predetermined gap from the bottom of the container body 1 (secondary oil / water separation chamber 14). It has been opened. An example of this gap is 30 mm.

Further, a connecting pipe widening portion 9'is formed on the upper portion of the connecting pipe 9, and a funnel-shaped opening 7 is provided on the upper end thereof.
The opening 7, the connecting pipe widened portion 9 ', the connecting pipe 9 and the suction 6 are formed by partially utilizing the inner wall of the container body 1 as shown in FIG. 1, and the flow passage area of the connecting pipe 9 is sufficient. It is getting smaller.

A drain valve 12 is provided at a position lower than the top of the partition plate 5 and in communication with the connecting pipe widening portion 9 '. Reference numeral 2 denotes a waste oil inflow hole, which is provided on the ceiling of the primary oil / water separation chamber 13 as shown in FIG. 2, and its position is farthest from the communication hole 11. Further, as shown in FIG. 3, the lower end of the waste oil inflow hole 2 is widened toward the end, and is lower than the mounting height of the drain valve 12. An opening / closing lid 4 is provided on the ceiling of the secondary oil / water separation chamber 14.

In this embodiment, as shown in FIG. 2, three viewing windows 15 are provided across three chambers partitioned by a partition plate 5. The viewing window 15 is attached to the opening / closing lid 4. 3 is a ventilation hole.

The operation of the present embodiment configured as above will be described below. First, the communication hole 11 can be opened / closed by an opening / closing plate (not shown), and the partition wall 10 is used for the primary oil / water separation chamber.
13 and secondary oil / water separation chamber 14
The waste oil inflow hole 2 to close the primary oil / water separation chamber.
The waste oil contained in 13 can be separated into oil and water in the primary oil / water separation chamber 13 due to the difference in specific gravity, and the oil floats and the water settles, and in the primary oil / water separation chamber 13, the upper layer of oil and the lower layer of water are It becomes possible to store.

Next, when the oil level that has floated and separated rises, the opening / closing plate is operated to open the communication hole 11. The communication hole 11 is provided at the bottom of the container body 1 so that the primary oil / water separation chamber 13 and the secondary oil / water separation chamber 14 communicate with each other.
It is possible to make the lower layer water that has settled and separated inside the secondary oil-water separation chamber 14 flow through the communication hole 11 first, and then to the secondary oil-water separation chamber 14 with the oil and water mixed. It becomes possible to make it inflow. Further, since the partition plate 5 is formed of a perforated plate that allows only water to pass, only the water that has previously flown into the secondary oil / water separation chamber 14 can freely pass through the small holes of the partition plate 5. Let the secondary oil-water separation chamber
Within 14, it becomes possible to store water at a certain water level that is equal in each chamber partitioned by the partition wall 10, and in such a state that the water level in each chamber partitioned by the partition wall 10 is maintained, The oil-water mixture is then mixed with the oil-water, then the secondary oil-water separation chamber
It becomes possible to let it flow in.

Therefore, the specific gravity of oil is smaller than that of water, so that the water accumulated first exhibits a sealing effect against a kind of oil. The communication hole 11 communicates with the first chamber partitioned by the partition plate 5, each chamber partitioned by the partition plate 5 is partitioned in the width direction of the partition wall 10, and the partition plate 5 can pass only water. Since it is made of a perforated plate, the oil can be floated and separated into the first chamber partitioned by the partition plate 5a without flowing into the chamber partitioned by the partition plates 5b and 5c. The water accumulated in the chamber can be made to flow through the small holes of the partition plate 5a to the chamber partitioned by the next partition plate 5b in order.

Even during this period, the waste oil is continuously put into the primary oil / water separation chamber 13 through the waste oil inflow hole 2. Then, the waste oil inflow hole 2
Is located farthest from the communication hole 11, so that it is possible to prevent the disturbance of the oil-water separation state in the vicinity of the communication hole 11.
In this way, by continuously supplying the waste oil from the waste oil inflow hole 2, the liquid level in the secondary oil / water separation chamber 14 also rises. The partition plate 5 allows only water to pass therethrough, and the water has a kind of sealing effect against oil, and the drain valve 12 has a communication hole.
Since it is provided on the side of the final chamber that is partitioned by the partition plate 5h on the side opposite to 11, only water flows through the partition plate 5 toward the drain valve 12, and the liquid level finally reaches the drain valve 12 Only the water can be drained from the drain valve 12 when the height is reached.

Thus, with the outflow of water from the drain valve 12, only the water in the secondary oil-water separation chamber 14 flows to the drain valve 12 side, while only the oil enters the chamber partitioned by the partition plate 5a. It is possible to float and separate and replace the first chamber partitioned by the partition plate 5a with oil. Thus, when the first chamber partitioned by the partition plate 5a is replaced with oil and the oil level reaches the height of the drain valve 12 (the water level of the container body 1), the water level does not rise any further, so the partition It is possible to fill the first chamber partitioned by the plate 5a with oil.

On the other hand, from the communication hole 11, the secondary oil-water separation chamber can be continuously operated by balancing with the amount of water flowing out from the drain valve 12.
Oil and water mix in and flow into the inside. Since there is a certain gap between the lower end of the partition plate 5 and the bottom of the secondary oil / water separation chamber 14, the mixture of oil and water that has flowed in in this way (previously separated in the primary oil / water separation chamber 13 Because
Waste oil (there is more water) flows through the first partition chamber filled with oil through the lower end gap of the partition plate 5a due to specific gravity balance, and then flows into the next chamber partitioned by the partition plate 5b. It becomes possible to replace the oil with water in the same manner as the first chamber partitioned by the partition plate 5a. In this way, it becomes possible to successively replace oil and water into the chambers partitioned by the partition plates 5c to 5h. Then, when the oil starts to flow out from the drain valve 12, the inflow of the waste oil from the waste oil inflow hole 2 is stopped.

That is, by partitioning the inside of the container body 1 by the partition wall 10 and providing an openable / closable communication hole 11 for connecting the primary oil / water separation chamber 13 and the secondary oil / water separation chamber 14,
The oil / water separation is performed in advance at 13, and the communication hole 11 that can be opened / closed next is opened to allow the water in the lower layer of the primary oil / water separation chamber 13 to flow into the secondary oil / water separation chamber 14 so that the water is separated from the lower end of the partition plate 5. Next oil / water separation room
The gap between the bottom of 14 is closed with water to give a kind of sealing effect against oil, and then a secondary plate 5 made of a perforated plate through which only water can pass is formed in the direction of the partition wall. The inside of the oil / water separation chamber 14 is divided into a plurality of chambers, and a constant gap is provided between the lower end of the partition plate 5 and the bottom of the secondary oil / water separation chamber 5 to form a communication passage, thereby separating the secondary oil / water. In the chamber 14, while each of the chambers partitioned by the partition plate 5 sequentially replaces oil and water, only water freely passes through the partition plate 5 and only water is moved to the drain valve 12 side. At the final stage when each chamber partitioned by the partition plate 5 is replaced with oil, the entire water flow system in the primary oil water separation chamber 13 and the secondary oil water separation chamber 14 is replaced with oil, and the drain valve 12 Since the oil begins to come out from the oil, it is known that the oil recovery is completed, and the inflow of the waste oil from the waste oil inflow hole 2 is stopped, The recovery is completed.

Next, an experimental example of this embodiment will be shown and described below. The experimental specifications of this example are as follows.

(1) Container external dimensions: width 1350 mm, length 800 mm, height 13
00mm (2) Waste oil input: Average 100 / H (3) Oil content New oil name (trade name): Mobile gear 629 (specific gravity 0.89
9) (4) Partition plate bottom plate gap: 100mm (5) Drain valve position: 100mm below container ceiling (6) Discharge port position: 30mm above container bottom plate The test results are shown in the table below.

From the above table, in this example, the internal oil content of the waste oil recovery amount 1300 is
It is 96.6%. The reason why the oil recovery rate does not reach 100% is that, when the waste oil recovery is completed, the water that has been introduced from the waste oil inflow hole 2 and is being separated from the unoiled water is mixed.

In the conventional example of FIG. 4, oil-water separation is performed with the discharge port 12 'closed, and the oil is discharged from the discharge port 12' until some oil and water are mixed. Is the lowest.

Further, in the conventional example shown in FIG. 5, the amount of water in the drainage channel 18 and the amount of water in the separation of the unoiled water are large, so that the oil recovery rate is lower than that of the present example.

Next, the operation of the connecting pipe 9 will be described. Since the suction 6 is widened toward the end, clogging of oil mud and sludge is small. Further, since the flow of water in the secondary oil / water separation chamber 14 is gentle, the oil mud and sludge are not entrained in the suction 6. If the suction 6 is clogged, the liquid level in the container body 1 rises, overflows from the release port 7 and is discharged from the drain valve 12, so oil does not overflow from the container body 1. .

Further, the water overflowing from the release port 7 only collects in the connecting pipe 9 having a small volume, and does not significantly affect the oil recovery rate. Next, since the peep window 15 can visually see each chamber partitioned by the partition plate 5, and oil and water are sequentially replaced in each partitioned chamber, what number chamber is replaced by oil? Check the oil recovery status. Since the viewing window 15 is provided on the lid 4 and does not come into direct contact with oil, it does not become dirty.

(Effect of the Invention) As described in detail above, according to the present invention, the inside of the container body is partitioned by the partition wall to divide into a primary oil / water separation chamber and a secondary oil / water separation chamber, and a primary oil / water separation chamber and a secondary oil / water separation chamber are provided. Since the partition wall is provided with an openable and closable communication hole that communicates at the bottom, first, the communication hole is closed and the waste oil put in the primary oil-water separation chamber is separated in advance into oil-water, and then the communication hole is opened. The water that has been opened and accumulated in the lower layer of the primary oil / water separation chamber is allowed to flow into the secondary oil / water separation chamber to give a kind of sealing effect to oil, and the secondary oil / water separation chamber is partitioned by the partition plate. While preventing the oil from flowing into the chamber, the chambers partitioned by the partition plate can be sequentially replaced with oil, and the oil recovery rate can be improved.

Further, in the organic relationship between the water and a kind of sealing effect against oil, a plurality of partition walls made of a perforated plate capable of passing only water in the secondary oil-water separation chamber are provided in the width direction of the partition wall. Since it is divided into chambers, by preventing the oil from flowing into the next partitioned chamber due to a kind of sealing effect of water, only water will pass through the partition plate and sequentially into the next partitioned chamber. As a result of the flow, the chamber partitioned by the partition plate can be efficiently replaced with oil, and the oil recovery rate can be improved.

And since a communication passage is formed by providing a gap between the lower end of the partition wall and the bottom of the secondary oil / water separation chamber so that each of the plurality of partitioned chambers communicates at the bottom, the chambers partitioned by the partition plate are formed. When the oil is replaced with oil, the water in the gap that was sealed by the water sealing effect until it is replaced disappears and is filled with oil. When the next partitioned chamber is replaced with oil, it is possible to sequentially replace the partitioned chamber with oil through the gap to the next partitioned chamber, and recover the oil. The rate can be improved.

A drain valve is provided on one side of the secondary separation chamber, and an openable and closable communication hole is provided on the opposite side of the drain valve to communicate the primary oil / water separation chamber and the secondary oil / water separation chamber at the bottom. Since it is provided on the partition wall, when the partitioned chamber is replaced with oil, water passing through the partition plate can be made to flow from the communication hole side to the discharge valve side, and the partitioned chamber is replaced with oil. Can be sequentially performed from the first partitioned chamber on the communication hole side to the final partitioned chamber on the discharge valve side, thereby discharging only water from the discharge valve and improving the oil recovery rate. be able to.

[Brief description of drawings]

FIG. 1 is a front view showing a longitudinal section of an embodiment of the present invention,
2 is a plan view of FIG. 1, and FIG. 3 is a vertical sectional view taken along the line III-III of FIG. FIG. 4 is a front view of a conventional container, and FIG. 5 is a front view of a conventional container provided with a partition plate. 1 …… Container main body 5 …… Partition plate 6 …… Suction (suction port) 9 …… Connection pipe 10 …… Differential partition 11 …… Communication hole 12 …… Drain valve 13 …… Primary oil / water separation chamber 14 …… Secondary oil / water Separation room

Claims (1)

[Scope of utility model registration request] 1. A waste oil container in which water and oil are separated by a difference in specific gravity in the container body, and the water accumulated in the lower layer is discharged to store and recover the oil component in the container body. It is divided into a primary oil / water separation chamber and a secondary oil / water separation chamber, and the secondary oil / water separation chamber is divided into a plurality of chambers in the width direction of the partition wall by a partition plate made of a perforated plate through which only water can pass. At the same time, a space is provided between the lower end of the partition wall and the bottom of the secondary oil / water separation chamber to form a communication path so that the plurality of partitioned chambers communicate with each other at the bottom. A drain valve is provided on the side, and the partition wall is provided with an openable and closable communication hole that is located on the opposite side of the drain valve and that allows the primary oil-water separation chamber and the secondary oil-water separation chamber to communicate at the bottom. Waste oil container to be used.