JPH0694646B2 - Liquid recovery device and its utilization system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for recovering liquid such as spilled oil and a system for using the same.

[0002]

2. Description of the Related Art Marine pollution accidents in which crude oil, fuel oil, etc. leak out frequently due to grounding accidents and sinking accidents of ships, especially tankers, and it is strongly recommended to collect these spilled oils as much as possible to protect the environment. Is desired.

In response to the above-mentioned demand, a device for collecting spilled oil is
Various types have been developed, for example, Japanese Patent Publication No. Sho 59-2080.
Japanese Laid-Open Patent Publication No. 7-26422
Japanese publications are known. In the publicly known example of, the spiral guide plate is held horizontally on the water surface so as to restrain the rotation, and an impeller is concentrically arranged below the spiral guide plate so as to be freely rotatable, and a central portion of the spiral guide plate is provided. An oil suction pipe is provided, and the part of the spiral guide plate that is submerged in water becomes deeper from the water surface toward the center of the spiral, while the impeller rotates in the winding direction of the spiral guide plate to create a water level gradient. The spilled oil is caused to be generated, the spilled oil is entrained in the spiral guide plate, the oil is densified along the spiral guide plate and accumulated at the center of the spiral, and this is collected by the oil suction pipe.

Further, in a known example by the applicant of the present invention,
The vacuum pump collects oil from the oil sump chamber installed above the liquid level above the separation section of the main body tank, and the water overflows into the overflow pipe in the inner cylinder and is drained by the drain pump. is there.

[0005]

However, in the above-mentioned known example, there is a limit to the oil layer that collects in the center of the spiral of the spiral guide plate, and a large amount of water is easily sucked together with oil from the oil suction pipe, resulting in a wider underwater surface. On the contrary, the phenomenon that the oil film moves away by the rotation of the impeller occurs, and because the water is sucked from the center of the spiral of the spiral guide plate due to the rotation of the impeller, the oil is entrained with the water. However, depending on the type of oil, that is, when the difference in specific gravity from water is relatively small or the viscosity is low, a large amount of oil may be entrained and the oil may be emulsified by turbulent flow.

Further, in the above-mentioned known example, since the oil is collected by the vacuum pump d from the oil sump chamber c above the liquid surface, the oil can be collected efficiently, but at the water surface. The amount of oil present, especially when it is small, may involve water and be collected.

In view of the above circumstances, the present invention has been made by improving the present invention. It is possible to efficiently recover only oil even under a wide surface of water, and the recovery process On the contrary, an object of the present invention is to provide a liquid recovery device which does not emulsify a part of oil.

[0008]

In order to solve the above-mentioned problems, the liquid recovery apparatus of the present invention comprises a main body tank which floats on the liquid in the main float and has an inlet, and a guide float which is loosely fitted in the main body tank. An inflow guide part which floats in the liquid and has an inflow port for introducing a fluid into the main body tank, and an inner cylinder inserted into the main body tank so as to have a gap in the bottom plate of the main body tank. A separation part is provided between the inner cylinder and the side wall of the main body tank to separate liquids having different specific gravities, and one end of the separation part opened in the inner cylinder in a state of being inserted into the inner cylinder. An overflow pipe having the other end penetrating the main body tank to overflow a liquid having a high specific gravity after separation, and a drawing pipe for opening the lower surface of the baffle plate of the separating portion to extract a liquid having a low specific gravity. It consists of

In this liquid recovery device, it is preferable that the suction side of the pump is connected to the other end opening of the overflow pipe, and further the nozzle is connected to the delivery side of the pump via a pipe so that the injection direction of the nozzle is It is better to point the to the inflow guide part.

Further, the liquid recovery apparatus may be provided with a propulsion unit for moving the liquid in the overflow pipe to the outside in the vicinity of the other end opening of the overflow pipe, and the liquid therein is discharged from the other end opening in the overflow pipe. It is also possible to provide a propulsion device for moving it to the outside.

Further, in this liquid recovery device, one end of the overflow pipe is opened in the inner cylinder in a state where the overflow pipe is inserted into the inner cylinder of the separating portion, and the other end is closed by the bottom plate of the main body tank, and other members are provided. The discharge pipe fixed by is inserted in the overflow pipe in a loosely fitted state to discharge a liquid having a large specific gravity, and at the same time the main body tank can be moved in the vertical direction by the discharge pipe.

Further, the mounting position of the main float with respect to the main body tank can be freely changed to change the draft position of the main body tank, and the mounting position of the guide float with respect to the inflow guide section can be freely changed. good shall alter the draft position.

In this liquid recovery device utilization system, the liquid recovery device is installed in the liquid region, and a separate tank is installed in the extraction pipe via a pump installed in the land region, and the specific gravity in the separate tank is high. The overflow portion of the liquid is connected to the liquid region, and the pump can be freely operated for a predetermined time by setting a timer.

[0014]

According to the liquid recovery apparatus having the above-mentioned structure, the liquid containing oil or the like having a low specific gravity, which has entered from the inlet of the inflow guide portion that follows the fluctuation of the liquid surface, enters the inside of the main tank. Circulation is alienated by the baffle plate of the separation unit, and the oil or the like is separated from the heavy water or the like due to the difference in specific gravity. The oil or the like collects in the separation unit, and when a predetermined amount is reached, the oil or the like is recovered from the drawing pipe. On the other hand, water or the like enters the inner cylinder from the separation unit, overflows into the overflow pipe, is once edged, and only water or the like that overflows and enters the overflow pipe is discharged to the outside.

When the suction side of the pump is connected to the other end opening of the overflow pipe, water in the overflow pipe is smoothly discharged to the outside, and a nozzle is connected to the delivery side of the pump via a pipe. When the injection direction of is directed to the inflow guide portion side, oil or the like floating in the liquid flows to the inflow guide portion side and is collected.

In the vicinity of the other end opening of the overflow,
Alternatively, even if a propulsion device is provided in the overflow pipe, water and the like in the overflow pipe can be smoothly discharged to the outside.

Further, mounting the overflow pipe on the bottom plate of the body vessel in the closed state, when the discharge tube is fixed from the opening face of the overflow pipe to another member is inserted in a loosely fitted state, the body vessel It does not move in the horizontal direction by emissions pipe and exhaust
Not be moved in the vertical direction by the weight of the output pipe, the main body bath just follow moves only in the vertical direction by variations in the liquid volume of the overflow tube.

Further, if the main float and the guide float can be freely attached to the main body tank and the inflow guide portion, the draft positions of the main body tank and the inflow guide portion change due to changes in the own weight and the specific gravity of the liquid. By adjusting the buoyancy of the main float and the guide float, it is possible to maintain the predetermined draft position of the main body tank and the inflow guide portion.

According to the liquid recovery device utilizing system having the above-mentioned configuration, the pump installed on the land area is operated for a predetermined time by the timer setting to recover the liquid (mixed liquid of water and oil), and the specific gravity of the separate tank is increased. By separating the heavy liquid (water) from the overflow portion into the liquid region and appropriately withdrawing the liquid (oil) having a low specific gravity from the separate tank, only the liquid having a low specific gravity is recovered from the liquid.

[0020]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view of the liquid recovery device of the present invention, and FIG.
Is a cross-sectional view of the liquid recovery device, and FIG. 3 is a cross-sectional view of a part of the liquid recovery device. In the drawing, reference numeral 1 denotes a liquid recovery device, which is a main body tank 3 that floats on the liquid in a main float 2, and an inflow guide portion 5 that loosely fits in the main body tank 3 and floats on the liquid in a guide float 4. And a separation part 6 provided in the main body tank 3, and one end opening 8a opened in the inner cylinder 7 and the other end opening 8b penetrating the main body tank 3 in a state of being inserted into the inner cylinder 7 of the separation part 6. The overflow pipe 8, the pump 9 attached to the other end opening 8b of the overflow pipe 8, and the extraction pipe 10 installed in the separation unit 6 are the main constituent elements.

The main body tank 3 has a bottomed cylindrical body, three main body inlets (inflow ports) 11 are formed in the side wall thereof, and three brackets 12 are provided in the upper opening thereof, and the tip thereof is provided. The three main floats 2 are fixed to each. Therefore, the main body tank 3 floats on the liquid by the main float 2. The number of the main floats 2 increases to 4, 5 depending on the size of the liquid recovery device.

The inflow guide portion 5 has a cylindrical body 13 having a diameter slightly larger than the outer peripheral surface of the main body tank 3, and three inflow ports 14 are formed in the cylindrical body 13 and the guide float is provided in the cylindrical body 13. 4 is fixed. A flow rate adjusting plate 15 is fixed to the inlet 14 of the cylindrical body 13 with a bolt 16. Therefore, the inflow guide portion 5 is loosely fitted to the outer periphery of the main body tank 3 and floats in the liquid by the guide float 4,
It will float independently on the liquid regardless of the body tank 3.
The inflow guide portion 5 can adjust the inflow amount of the liquid by changing the mounting position of the flow rate adjusting plate 15 with the bolt 16.

The separating portion 6 has the inner cylinder 7 which is mounted on the main body tank 3 substantially concentrically. With the inner cylinder 7 mounted, one end opening 7a is located near the bottom plate 3a of the main body tank 3. The other end opening 7b is located on the opening surface of the main body tank 3.
Between the main body tank 3 and the inner cylinder 7, baffle plates 17, 18 and 19 are sequentially provided from the upper part to the lower part, and a perforated plate 20 is further provided at the lowermost part. Therefore, the water containing oil, etc. that has flowed into the main body tank 3 through the above-mentioned inflow guide portion 5,
It is separated from the specific gravity difference in the separation section 6, and further the separation is promoted by the baffle plates 17, 18, 19 and the perforated plate 20,
Almost completely separated into oil and water.

The overflow pipe 8 is positioned concentrically with the inner cylinder 7 and stands on the bottom plate 3a of the main body tank 3. The one end opening 8a of the overflow pipe 8 has a trumpet shape so that the water flowing into the inner cylinder 7 can be prevented from flowing into the overflow pipe 8.
It is easy to overflow inside.

The pump 9 is attached to the bottom plate 3a of the main body tank 3 and has the other end opening 8 of the overflow pipe 8 described above.
The suction 9a in the casing 21 is associated with b. Therefore, the water in the overflow pipe 8 is discharged to the outside from the delivery 9b of the casing 21 by the rotation of the impeller 22 of the pump 9.

The drawn-out pipe 10 is attached to a baffle plate 18, and one end opening 10a thereof opens below the baffle plate 18,
The other end opening 10b opens above the opening surface of the main body tank 3, and a suction hose 23 or the like can be connected to the other end opening 10b. A pump 24 for draining oil is connected to the suction hose 23. Has been done. Therefore, the oil accumulated in the lower separating portion 6 by the baffle plate 18 can be discharged to the outside by the drawing pipe 10. In addition, this separating unit 6
Is equipped with a sensor 25 for detecting the oil layer, detects that the oil layer has exceeded a predetermined level and starts the pump 24, and stops when the oil layer has dropped below a predetermined level. It is designed to let you.

Next, the operation of the liquid recovery apparatus 1 having the above structure will be described. First, the liquid recovery apparatus 1 is transported to a place where the water surface from which oil or the like has flown out, and necessary setting such as loosely fitting the inflow guide portion 5 into the main body tank 3 is performed, and the central portion of the oil floating on the water surface Float the liquid recovery device 1. Next, adjust the flow rate adjusting plate 15 of the inflow guide portion 5 to an appropriate position, connect the pump 9 and the extraction pump 24, etc. to a power source, connect the suction hose 23 to the extraction pipe 10 and the suction of the extraction pump 24. Then, the delivery side of the extraction pump 24 is connected to an oil tank or the like, and the liquid recovery apparatus 1 is ready for operation and turned on. The oil-containing water is used as the inflow guide portion 5
Through the inflow port 14 and the main body inflow port 11 of the main body 3 and is guided by the baffle plate 17 to enter the separation section 6. And
The water containing this oil collects oil having a low specific gravity in the upper part of the separating portion 6 while passing between the baffles 17, 18, and 19, water having a high specific gravity flows in the lower part, and further passes through the holes of the perforated plate 20. Inner cylinder 7
Flows in. When the water passes through the perforated plate 20, the oil which has not been separated yet hits the perforated plate 20 to further promote the separation of the oil. The water that has entered the inner cylinder 7 rises and overflows from the one end opening 8a that opens like a trumpet, enters the overflow pipe 8, enters the casing 21 from the delivery 9a of the pump 9, and is pressurized by the impeller 22 and discharged. The water is discharged from the outlet 9b into the water. When a hose of a predetermined length is connected to the discharge port 9b, a nozzle is further attached to the end of the hose, and the injection direction is directed from the outer peripheral position of the oil film toward the inflow guide portion 5, the oil film becomes liquid. It moves toward the recovery device 1 and recovers the oil floating on the water surface even better.

On the other hand, when the amount of the oil accumulated in the separating portion 6 exceeds a predetermined amount, the sensor 25 detects it and activates the drawing pump 24, and this drawing pump 24 removes the oil below the baffle plate 18. It is pulled out and sent to an oil tank or the like through the suction hose 23 and the delivery side hose. Because there are baffle plates 17, thereby not the this as pulling the water containing the oil immediately after the inflow. When the oil is drawn up to a certain level or higher, the sensor 25 detects it and stops the operation of the drawing pump 24. After that, the same operation as described above is repeated, and almost all the oil floating in the water can be collected.

FIG. 4 shows another embodiment of the present invention. The difference between this liquid recovery apparatus 1a and the embodiment shown in FIGS. 1 to 3 is that an overflow is formed through the bottom plate 3a of the main body tank 3. In the vicinity of the other end opening 8b of the pipe 8, the impeller of the pump 9 described above is provided.
An impeller (propulsion device) 30 having substantially the same shape as 22 is provided.
The point 30 is attached to a shaft 32 connected to a drive motor 31 provided on the upper surface of the main body tank 3. The impeller 30 may be provided inside the overflow pipe 8. The other structure and operation are substantially the same as those of the embodiment shown in FIGS.

FIG. 5 shows another embodiment of the present invention. The difference between this liquid recovery apparatus 1b and the embodiment shown in FIGS. 1 to 3 is that an overflow is formed through the bottom plate 3a of the main body tank 3. The discharge pipe 33 is connected to the pipe 8 and the tip of the discharge pipe 33 is connected to a pump installed on land. The other structure and operation are substantially the same as those of the embodiment shown in FIGS. Even if a hose or the like is connected to the delivery side of the land-based pump and a nozzle is attached to this hose, the oil floating on the water surface can be collected even better as described above.

6 and 7 show another embodiment of the present invention. The difference between this liquid recovery apparatus 1c and the embodiment shown in FIGS. 1 to 3 is that an overflow pipe 8 is provided on the bottom plate 3a of the main body tank 3. the attachment in closed condition, inserted in a loosely fitted state emissions tube 42 which is fixed by the support member (another member) 41 attached to the tank 40 into the overflow tube 8, the guide 43 provided in the emissions pipe 42 Thus, the main body tank 3 can be moved vertically without swinging in the horizontal direction. That is, the main body tank 3
It does not move in the horizontal direction by the guide 43 of the emissions tube 42, discharge
It does not move in the vertical direction by the weight of the delivering pipes 42, just follow moves only in the vertical direction by variation of the amount of liquid in the overflow pipe 8. The other structure and operation are the same as those of the embodiment shown in FIGS. Note that there is a baffle plate 19 below the lower end opening 10a of the drawing pipe 10, and therefore water containing oil is collected from the horizontal direction. Therefore, when there is no baffle plate 19 when collecting oil, The oil can be recovered in a better ratio than the above.

FIGS. 8 and 9 show another embodiment of the present invention. The difference between this liquid recovery apparatus 1d and the embodiment shown in FIGS. 1 to 3 is that the main float 2 is attached to the main body tank 3. The position can be freely adjusted with respect to the bracket 12 by the screw rod 51 attached to the main float 2 and the two nuts 52 and 53, and the guide float 4 with respect to the inflow guide portion 5 can be adjusted.
The mounting position of the three holding parts 54, 5 fixed to the main body tank 3
The point is that the draft positions of the main body tank 3 and the inflow guide portion 5 can be freely moved by freely adjusting them with 4, 54 and three tightening screws 55, 55, 55. Thereby, the liquid recovery device 1
With respect to d, the buoyancy of the main and guide floats 2 and 4 can be easily adjusted in response to changes in the specific gravity of water containing oil, and changes in its own weight, and the draft position of the main body tank 3 can be adjusted. Other configurations and their description is omitted with the same reference numerals in the drawings because with the action similar to the embodiment of FIGS.

FIG. 10 shows the above-mentioned liquid recovery apparatus 1, 1a, 1
1 shows a liquid recovery device utilization system (hereinafter simply referred to as utilization system) incorporating any one of b, 1c, and 1d.
(b, 1c, 1d) are installed in the liquid region 61, and the suction hose 23 is connected to the drawing pipe 10 thereof.
A pump 24 for draining oil is connected to. In addition,
The pump 24 is installed in the land area 62, and the delivery side of the pump 24 is connected by a hose 63 to a separate tank 64 also installed in the land area 62. The separate tank 64 separates liquids having different specific gravities, and in this embodiment, separates oil and water. This separate tank 64 is an overflow portion 65 is provided, et al is, water flowing out from the overflow portion 65 is adapted to flow into the liquid zone 61 described above. Then, the pump 24 is freely operated by setting a timer. That is, when the recovered oil is large, the timer is set to 0 and continuous operation is performed, and when the recovered oil is small, intermittent operation is performed. At this time, water will be collected together with oil,
The oil and water are separated by the separate tank 64, the water is returned to the original fluid region 61, and the oil sump portion 66 of the separate tank 64 is separated.
If the oil is appropriately extracted from the liquid, the liquid recovery device utilization system 60 can recover only the oil by the operation of the pump 24 set by the timer. Therefore, it is possible to automatically collect the oil without using a system for automatically collecting only the oil by the oil recovery sensor system. That is, the oil recovery sensor system detects that the electric resistance becomes large due to the increase in the oil content in the water and controls the operation of the pump 24, but the accuracy is too high, and the oil is an emulsion. When it becomes a new type, it is difficult to detect it, and fine adjustment is always required, which complicates operation management on site.

In this embodiment, the case of recovering oil has been described, but the present invention is not limited to this, and is almost applicable as long as liquids having a difference in specific gravity do not dissolve each other.

[0035]

As described in detail above, according to the liquid recovery apparatus of the present invention, the liquid containing oil or the like having a low specific gravity, which has entered from the inlet of the inflow guide portion that follows the fluctuation of the liquid surface, is the main body. It enters from the inlet of the tank, the distribution is alienated by the baffle plate of the separation part, it is separated into oil etc. and water with a large specific gravity due to the difference in specific gravity, and the oil etc. accumulates in the separation part Collect oil, etc. On the other hand, water etc. enters the inner cylinder from the separation part,
Only water or the like that overflows into the overflow pipe and once enters the overflow pipe is cut off, and is then discharged to the outside. Therefore, even for oil or the like having a relatively small difference in specific gravity from water or oil having a low clay, it is possible to efficiently recover only the oil or the like, and further, only the water or the like after being separated from the oil or the like can be collected. Since water or the like is pulled out from the overflow pipe more than necessary, even if the water or the like is returned under a wide water surface, the water or the like does not reversely diffuse.

When the suction side of the pump is connected to the other end opening of the overflow pipe, the liquid in the overflow pipe is smoothly discharged, and a nozzle is connected to the delivery side of the pump via a pipe so that the injection direction of the nozzle is Is directed toward the inflow guide portion, the oil floating in the liquid flows toward the inflow guide portion side and is collected. Therefore, since water etc. is not discharged from the discharge side of the pump to the outside more than necessary, the oil etc. can be diffused by this water etc. even if it is returned to the original water level even under a wide water surface. There is no. On the contrary, it is also possible to collect and collect oil or the like which is to be diffused by water or the like discharged from the nozzle.

Even if a propulsion device is provided near the other end opening of the overflow pipe or inside the overflow pipe, the liquid in the overflow pipe can be smoothly discharged. Therefore, the same effect as described above is achieved.

Further, the overflow pipe mounted in closed on the bottom plate of the body vessel, when the discharge tube is fixed from the opening face of the overflow pipe to another member is inserted in a loosely fitted state, pipe out exhaust main body bath Does not move horizontally and
Not be moved in the vertical direction by the weight of the output tube, so only follow movement in the vertical direction by fluctuation of the liquid volume of the body vessel just overflow pipe. Therefore, even if the oil to be collected is at a high temperature, a submersible pump or the like cannot be used as the pump to collect, and a recovery pump such as a gear pump is provided on land, the recovery pipe and its Since the weight of the liquid and the liquid does not affect the buoyancy of the main float of the main body tank, high temperature oil or the like can always be collected in a state where the main body tank is vertically stable.

Furthermore, if the main float and the guide float can be freely attached to the main body tank and the inflow guide section, the draft positions of the main body tank and the inflow guide section change due to changes in the own weight and the specific gravity of the liquid. On the other hand, the buoyancy of the main float and the guide float can be adjusted to maintain the predetermined draft position of the main body tank and the inflow guide portion. Therefore, the draft positions of the main body tank and the inflow guide portion can be easily adjusted with respect to changes in the specific gravity of the liquid to be recovered and changes in the weight of the apparatus itself.

Further, according to the liquid recovery device utilization system of the present invention, the pump installed on the land area is operated for a predetermined time by the timer setting to recover the liquid (mixed liquid of water and oil), and the separated tank is used. By separating the liquid with a high specific gravity (water), letting it flow from the overflow to the liquid area, and pulling out the liquid with a low specific gravity (oil) from the separate tank as appropriate, it is possible to use the oil detection sensor, etc. There is an effect that only the liquid having a low specific gravity can be automatically recovered from the liquid.

[Brief description of drawings]

FIG. 1 is a side view of a liquid recovery device of the present invention.

FIG. 2 is a vertical sectional view of a liquid recovery device.

FIG. 3 is a transverse cross-sectional view of a part of the liquid recovery device.

FIG. 4 is a vertical sectional view showing another embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing another embodiment of the present invention.

FIG. 6 is a vertical sectional view showing another embodiment of the present invention.

7 is a sectional view taken along the line AA of FIG.

FIG. 8 is a longitudinal sectional view showing another embodiment of the present invention.

9 is a cross-sectional view taken along the line BB of FIG.

FIG. 10 is a schematic flow chart of a liquid recovery device utilization system of the present invention.

[Explanation of Codes] 1, 1a, 1b, 1c, 1d Liquid recovery device 2 Main float 3 Main body tank 3a Bottom plate 4 Guide float 5 Inflow guide part 6 Separation part 7
Inner cylinder 8 Overflow pipe 8a One end opening 8b Other end opening 9
Pump 9a Suction port 9b
Discharge port 10 Drawing pipe 11 Main body inlet (inlet) 14 Inlet 17, 18, 19 Baffle plate 24 Pump 30 Impeller (propulsion unit)
41 indicating member (another member) 42 emissions pipe 60
Liquid recovery device utilization system 61 Liquid area 62 Land area 64 Separate tank 65
Overflow part

Claims (8)

[Claims] 1. A main body tank having a main float that floats in the liquid and has an inflow port, and an inflow that loosely fits in the main body tank and floats in the liquid that has a guide float and introduces a fluid into the main body tank. Insert the guide and the inner cylinder into the main body tank.
The bottom plate of the main body tank is provided with a gap and a baffle plate is provided between the inner cylinder and the side wall of the main body tank to separate a liquid having a difference in specific gravity, and the separation part is inserted into the inner cylinder of the separation part. In the state, one end is opened into the inner cylinder and the other end is penetrated through the main body tank, and an overflow pipe for overflowing a liquid having a high specific gravity after separation and an opening on the lower surface of the baffle plate of the separation portion are opened. A liquid recovery device which is installed and comprises a drawing tube for drawing a liquid having a low specific gravity. 2. The liquid recovery apparatus according to claim 1, wherein a suction side of the pump is connected to the other end opening of the overflow pipe. 3. The liquid recovery apparatus according to claim 2, wherein a nozzle is connected to the delivery side of the pump via a pipe, and the jetting direction of the nozzle is directed to the inflow guide portion. 4. The liquid recovery apparatus according to claim 1, wherein a propulsion device is provided in the overflow pipe to move the liquid therein from the other end opening to the outside. 5. The liquid recovery apparatus according to claim 1, wherein a propulsion device is provided in the overflow pipe to move the liquid therein from the other end opening to the outside. 6. The discharge pipe, wherein one end of the overflow pipe is opened in the inner cylinder in a state where the overflow pipe is inserted in the inner cylinder of the separation portion, the other end is closed by the bottom plate of the main body tank, and fixed by another member. liquid recovery apparatus according to claim 1 that allows moving the body vessel at the discharge pipe in the vertical direction together with the insert in the loosely fitted the tube <br/> the overflow pipe discharging the heavy liquid specific gravity. 7. The inlet position of the main float with respect to the main body tank can be freely changed to change the draft position of the main body tank, and the attachment position of the guide float with respect to the inflow guide part can be freely changed. 7. The liquid recovery apparatus according to claim 1, wherein the draft position is variable. 8. A liquid recovery device according to any one of claims 1, 2, 3, 4, 5, 6, and 7 is installed in a liquid region, and a pump installed in a land region in the extraction pipe thereof. A separate tank is installed through the liquid tank, and an overflow portion of the liquid having a large specific gravity in the separate tank is connected to a liquid region, and the pump is operable freely for a predetermined time from a timer setting. Recovery device utilization system.