JPH08299949A - Oily material recovering device - Google Patents

Abstract

PURPOSE: To provide an oily material recovering device capable of efficiently recovering an oily material at a low cost. CONSTITUTION: This device is provided with a sewage tank 2 for receiving a sewage and an air agitation device 3 for agitating by blowing air into the sewage in the sewage tank 2. And a sucking device 4 for sucking and recovering an oily material layer formed on the surface of the sewage by the agitation of the air agitation device 3 and a recovering vessel 5 for storing the oily material recovered by the sucking device 4 are installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oily substance recovery device, and more particularly to an oily substance recovery device for concentrating and recovering oily substances such as fats and oils contained in wastewater such as domestic wastewater.

[0002]

2. Description of the Related Art For example, domestic wastewater, industrial wastewater such as restaurants, and wastewater such as buildings usually contain a considerable amount of oily substances such as fats and oils and various organic substances such as starch and proteins. Most of the wastewater containing these oily substances and organic substances is discharged to the sewer as it is. However,
Such oily substances and organic substances contained in the sewage adhere to the inner surface of the drainage pipe over time and are stacked to cause clogging of the drainage pipe, or to be a source of offensive odor or offensive odor.

Therefore, in the place where the above-mentioned sewage is discharged,
Regarding oily substances, sewage is stored in a grease trap, the oily substances are suspended and separated in the grease trap, and the oily substances are collected by pumping with a ladle and the like, and disposed as industrial waste. Further, when the amount of wastewater is large, the oily substance in the grease trap is collected together with the wastewater and disposed of as industrial waste.

[0004]

However, the former method for pumping up the oily substance requires a lot of labor for the pumping work, resulting in an increase in cost, and that the work must be done under a bad odor. was there. Further, in the latter conventional recovery method, since a large amount of sewage is recovered at the same time as the oily substance, there is a problem that the recovery rate of the oily substance is poor, the processing efficiency as industrial waste is extremely poor, and the cost is high. . In addition, oils and fats,
Organic substances such as starch and protein adhere to these
There was a problem that the viscous blockage, so-called slime, becomes clogging in the drainage pipe.

Therefore, it is an object of the present invention to provide an oily substance recovery apparatus which can efficiently recover an oily substance at low cost. Further, the present invention also provides an oily substance recovery device that efficiently collects an oily substance at low cost and prevents clogging of a drain pipe and bad odor.

[0006]

The invention according to claim 1 of the present invention is a sewage tank for receiving sewage, an air stirring device for bubbling air into the sewage in the sewage tank, and this air. An oily substance recovery device comprising a suction device for sucking and collecting an oily substance layer formed on the surface of wastewater by stirring by a stirring device, and a recovery tank for storing the oily substance recovered by this suction device. The above object is achieved by providing

The invention according to claim 2 of the present invention is
The invention according to claim 1 provides a device for recovering oily substances, characterized in that a microbial supply unit for supplying a microbial group that decomposes organic substances such as oily substances is provided in the wastewater tank.

[0008]

According to the first aspect of the present invention, after the wastewater is received in the wastewater tank and the wastewater is temporarily stored in the wastewater tank, the air agitation device is intermittently driven to drive the wastewater. When air is bubbled into the sewage to agitate the sewage with air, the floating oily substance in the sewage is separated from the sewage by the stirring and floats on the sewage surface to form an oily substance layer on the sewage surface. When the suction device is driven in this state, the oily substance on the sewage surface is mainly sucked, and as a result, the oily substance can be collected in the collecting tank in a concentrated state.

According to a second aspect of the present invention, in the first aspect of the invention, a microbial supply section for supplying a microorganism group that decomposes an organic substance such as an oily substance into the wastewater tank. Since it is provided, the microorganisms supplied from the microorganism supply unit into the wastewater tank decomposes not only the oily substances in the wastewater but also other organic substances to eliminate the adhesion of slime to the drainage pipe, and It is possible to prevent clogging of the dirty water pipe and suppress the bad smell of the dirty water.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiment shown in FIG. 1 is an overall configuration diagram showing an embodiment of the oily substance recovery apparatus of the present invention.

As shown in FIG. 1, the oily substance recovery apparatus of the present embodiment includes a wastewater tank 2 for receiving wastewater discharged from a drainage pipe 1 of a kitchen and temporarily storing the wastewater, and a wastewater tank 2 inside the wastewater tank 2. Air stirring device 3 that stirs air by bubbling air into the dirty water
A suction device 4 for sucking and collecting the oily substance layer formed on the sewage surface by the stirring of the air stirring device 3, and a recovery tank 5 for storing the oily substance collected by the suction device 4.
It has and.

The sewage tank 2 is buried underground, for example, and the first sewage tank 2 is connected inside from the upstream side to the downstream side.
A, a second sewage tank 2B and a third sewage tank 2C, the sewage tanks 2A and 2B communicate with each other through a communication hole 2E formed in the upper part of the partition wall 2D, and the sewage tanks 2B and 2C have a partition wall. Two
The communication holes 2G formed in the lower portion of F communicate with each other. A screen cage 6 is attached along the wall surface of the wastewater tank 2 just below the intake port 2H of the first wastewater tank 2A. The screen cage 6 screens solid substances (not shown) in the wastewater. is there.

The air agitator 3 is provided on the bottom surface of the first sewage tank 2A and on the top surface of the sewage tank 2, and the jet water flow is generated by the water supply from the submersible pump 7. An ejector 8 for sucking the outside air and a nozzle pipe 9 for supplying the air sucked from the ejector 8 into the dirty water tank 2 and bubbling the dirty water are provided. This nozzle pipe 9 is used for the first, second and third wastewater tanks 2.
The first, second, and the like arranged along the bottom surfaces of A, 2B, and 2C.
It is constituted by the third piping nozzles 9A, 9B, 9C. Further, the submersible pump 7 and the ejector 8 are connected via a pipe 10, and the ejector 8 and the pipe nozzle 9 are connected to the pipe 11
Connected through. Then, the pipe 11 is branched in three directions, and the pipe nozzles 9A, 9B, 9 are provided at the respective branch points.
It is connected to C respectively. First to the first wastewater tank 2A
The branch pipe 11A branches at a portion near the ejector 8, and the second and third branch pipes 11 to the second and third wastewater tanks 2B and 2C are provided.
B and 11C are branched at a portion farther from the first branch pipe 11A.

The ejector 8 is, for example, the second waste water tank 2B.
Has a branch pipe 8A and a nozzle 8B which penetrate the upper surface of the wastewater and reach the liquid level of the wastewater, and the sequence valve 12A used when sucking air from the outside is located outside the wastewater tank 2 in the branch pipe 8A. It is installed. Furthermore,
A manual valve 13A for checking the amount of water and the suction air is attached to the second and third branch pipes 11B and 11C of the pipe 11. That is, when the jet water flow is generated in the ejector 8, air is sucked from the sequence valve 12A and the nozzle 8B which are opened by the action of the jet water flow, and this air is bubbled to the dirty water tank 2 through the nozzle pipe 9 as described above. I am doing it. Also, the first
A sequence valve 12B is provided in the branch pipe 11A, and a sequence valve 12C is also provided in each of the branch pipes 11D branching from the first branch pipe 11A to reach the branch pipes 11B and 11C.
By opening and closing 12C, the timing of bubbling air to each of the dirty water tanks 2A, 2B, and 2C is adjusted.
Further, manual valves 13B and 13C are arranged in the second and third branch pipes 11B and 11C, respectively.
The bubbling amount of air is adjusted by adjusting the openings of B and 13C.

Further, the suction device 4 shares the submersible pump 7 and the ejector 8 of the air stirring device 3. In the pipe 11, the fourth branch pipe 11E branches on the upstream side of the sequence valve 12C of the branch pipe 11D, the extended end of the branch pipe 11E reaches the inside of the recovery tank 5, and the oil sucked through the ejector 8 is sucked. The substance is supplied together with water into the recovery tank 5. And this branch pipe 11E
A sequence valve 12D is provided in the. Therefore, the suction device 4 is configured to include the submersible pump 7, the ejector 8 and the sequence valve 12D.

The recovery tank 5 is arranged on the upper surface of the dirty water tank 2. The recovery tank 5 is kept warm so that the oily substance recovered inside does not solidify and the oily substance is always kept in a liquid state. A pipe 14 for collecting the oily substance in the oil phase and a pipe 15 for collecting the water phase are connected to the side surface of the recovery tank 5 from the upper and lower portions. Valves 16A and 16B are attached to the pipe 14, and a valve 17 is attached to the pipe 15. Therefore, the oily substance in the recovery tank 5 is recovered into the recovery container 18 through the pipe 14, and the oily substance in the recovery container 18 is treated as industrial waste. The water in the recovery tank 5 can be returned to the second waste water tank 2B via the pipe 15, but is normally closed.

Further, a water phase overflow pipe 19 is connected to the recovery tank 5, and the overflow water from the overflow pipe 19 is automatically discharged to the second by the difference in specific gravity between water and oil.
It is designed to flow back to the dirty water tank 2B. Further, in FIG. 1, reference numeral 20 denotes an operation panel for operating the air stirring device 3, the suction device 4, the sequence valves 12A to 12D, and the like.
Reference numerals 1A and 21B are pressure gauges attached to the upstream side and the downstream side of the ejector 4, respectively, and the flow velocity of the jet water flow is monitored by the pressure difference between the two 21A and 21B. Incidentally, 22 and 23 are drainage pipes. Also, 25,
Reference numeral 26 is an electrothermal trace disposed in each of the branch pipe 8A and the fourth branch pipe 11E, and heating by the electrothermal trace and purging with hot water prevent the sucked oily substance from solidifying in the pipe.

Further, a microbial supply unit 24 for supplying a microbial group is arranged on the bottom surface of the first sewage tank 2A, and the microbial group is supplied from the microbial supply unit 24 into the sewage tank 2 for bubbling with the microbial group. Combined with the action of the generated air, the organic substances such as oily substances, starch, and proteins contained in the wastewater are microbiologically decomposed, clogging of pipes with slime and organic matter on the inner wall surface of the wastewater tank 2 are decomposed. The material is prevented from adhering and laminating, and the offensive odor and offensive odor caused by these organic materials are prevented. Examples of this microbial group include BRD liquid (manufactured by Adeka Clean Aid Co., Ltd.)
Can be mentioned.

Next, the operation will be described. Sewage from a kitchen or the like flows into the first wastewater tank 2A through the drain pipe 1. Then, the inflowing sewage is stored in the sewage tank 2, but the overflow level of the drainage pipe 22 is always maintained, and as shown in FIG. 1, the sewage surface is always the branch pipe 8 of the ejector 8.
It is in contact with the lower end of A. At this time, the submersible pump 7 is operated, for example, for 30 minutes in a state where the sequence valves 12A and 12B of the branch pipe 8A are opened and the sequence valve 12C is closed. As a result, when sewage is supplied to the ejector 8 via the pipe 10 and a jet water flow is created in the ejector 8, external air is sucked in through the sequence valve 12A and the branch pipe 8A, and the air is taken together with the sewage in the first branch pipe. When supplied into the first wastewater tank 2A through 11A and the first nozzle pipe 9A, air bubbles in the wastewater to stir the wastewater. As a result, the oily substance contained in the sewage floats and floats on the surface of the sewage to form a layered oily substance. On the other hand, the bubbling air supplies the microorganism group from the microorganism supply unit 24 into the wastewater, decomposes the organic substances contained in the wastewater, and eliminates the bad odor and the offensive odor.

After the supply of air into the first dirty water tank 2A is completed, the sequence valve 12B is closed, and the submersible pump 7 is operated with the sequence valve 12C and the electromagnetic valves 13A to 13C open. As a result, air is bubbled through the second and third nozzle pipes 9B and 9C, the sewage in the second and third sewage tanks 2B and 2C is agitated to float the oily substance, and a layer of the oily substance is formed on the sewage surface. To be done. During this period, decomposition of organic substances, bad odor,
The odor is eliminated. By such an operation, an oily substance layer is formed on the dirty water surface of the dirty water tank 2.

Next, the sequence valves 12A to 12C of the ejector 8 are automatically closed and the suction device 4
The submersible pump 7 is operated in a state in which the sequence valve 12D attached to is opened. At this time, the jet water flow in the ejector 8 sucks the layered oily substance together with air from the noise 8B of the branch pipe 8A, and the oily substance is collected into the recovery tank 5 through the fourth branch pipe 11E together with the dirty water. Supply and store. As a result, the oily substance contained in the waste water in the waste water tank 2 is concentrated and collected in the recovery tank 5. When the oily substance and the wastewater in the recovery tank 5 are collected, the valve 16A and / or 16B for the oily substance in the recovery tank 5
Is opened to collect only the oily substance in the collection container 18, and the collected oily substance is transported by the collection container 18 as industrial waste. After that, the series of operations described above is repeated to concentrate and collect the oily substance in the wastewater.

As described above, according to this embodiment, the air stirring device 3 collects the oily substance in the wastewater on the wastewater surface, and the suction device 4 automatically collects the oily substance.
Since the oily substance is concentrated and recovered, the oily substance can be efficiently recovered at low cost. In addition, in this embodiment, since the microorganisms are supplied from the microorganism supply unit 24 into the wastewater tank 2, the microorganisms decompose the organic substances in the wastewater microbiologically to prevent the generation of slime. In addition to being able to do so, it is possible to eliminate bad odors and offensive odors and to discharge the purified water to the sewage through the drain pipes 22 and 23.

The present invention is not limited to the above-described embodiments, and is included in the present invention as long as it does not violate the gist of the present invention.

[0024]

The oily substance recovery apparatus according to the first aspect of the present invention efficiently recovers the oily substance at low cost.

Further, the oily substance recovery device according to the second aspect of the present invention efficiently recovers the oily substance at low cost and prevents clogging of the drain pipe and bad odor.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of an oily substance recovery device of the present invention.

[Explanation of symbols]

 2 Sewage tank 3 Air stirring device 4 Suction device 5 Recovery tank

Claims (2)

[Claims] 1. A sewage tank for receiving sewage, an air agitator for bubbling air into the sewage in the sewage tank to agitate, and an oily substance layer formed on the sewage surface by agitation by the air agitator is sucked. An oily substance recovery device, comprising: a suction device for recovery; and a recovery tank for storing the oily substance recovered by the suction device. 2. The oily substance recovery device according to claim 1, wherein a microbial supply unit for supplying a microbial group that decomposes organic substances is provided in the wastewater tank.