JP2006198530A - Method of separating oil from earth/sand for oil-contaminated earth/sand, and apparatus for separating oil from earth/sand for oil-contaminated earth/sand - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for easily and effectively separating oil from earth/sand content from oil-contaminated earth/sand. <P>SOLUTION: Water is boiled by a steam boiler 1 to produce steam. When the stream is discharged outside after being injected into an inner chamber from a nozzle, the negative pressure produced in the inner chamber is utilized so as to suck the oil-contaminated earth/sand by using a steam ejector 2 sucking an object to be sucked. Therefore, the oil-contaminated earth/sand is exposed to high-temperature steam, by which the oil can be separated from the earth/sand. Further, at the sucking time of the steam ejector, a strong shearing force acts on the oil to separate the oil from the earth/sand. Thereafter, the oil can be separated from the earth/sand by a cyclone separator 3, and a water bath 5 for separating oil from earth/sand. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a method and an apparatus for separating oil and earth and sand by sucking oil-contaminated earth and sand contaminated by oil with a steam ejector.

  Crude oil spilled into the sea, such as when an oil tanker is stranded or submerged, not only pollutes the seawater, but also contaminates it by mixing or infiltrating oil into the sand and soil of the nearby beach. Various methods are known as methods for treating such oil-contaminated earth and sand.

  For example, incinerate oil-contaminated earth and sand, burn the oil, and then dispose of it in the final disposal site. Use a chemical to solidify the oil in the oil-contaminated earth and then discard it in the final disposal site. It is. However, when the amount of oil-contaminated earth and sand is large, it may be requested to remove only the oil from the oil-contaminated earth and return the remaining earth and sand to the site or reuse it.

  As a treatment method in such a case, a method has been proposed in which the oil component is floated on the water surface by putting it in a water tank containing water, and the sediment component is precipitated (see Patent Document 1).

However, in this method, a large amount of oil remains, and it is necessary to use other oil separation means or oil removal means in combination. Further, in this method, it is often difficult to remove oil from the earth and sand when the viscosity of the oil is high.
JP 2002-129245 A

  The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to provide a method and apparatus capable of easily and effectively separating oil and sediment from oil-contaminated sediment. There is.

In order to solve the above-mentioned problem, an oil-sediment separation method for oil-contaminated sediment according to claim 1 of the present invention,
Steam is generated by a steam ejector that sucks an object to be sucked by using a negative pressure generated in the inner chamber when the water is boiled to generate water vapor and discharged from the nozzle to the inner chamber and then discharged to the outside. Contaminated earth and sand are sucked, and oil and earth and sand are separated from the oil-contaminated earth and sand.

Moreover, the oil-sediment separation method of the oil-contaminated soil according to claim 2 of the present invention comprises:
In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
The oil-contaminated sediment is discharged after being sucked by the steam ejector, and the material passing through the steam ejector is placed in a centrifugal force separating means for separating using centrifugal force to separate the oil and the soil. Features.

In addition, an oil / sediment separation method for oil-contaminated soil according to claim 3 of the present invention includes:
In the oil-sediment separation method of the oil-contaminated soil according to claim 2,
The centrifugal force separating means has a diameter-reduced cylindrical portion that is reduced in diameter toward the lower separation port, and an upper separation pipe that extends from the vicinity of the center portion toward the upper outside, and is provided on the inner wall of the reduced-diameter cylindrical portion. A first rotating flow that descends while rotating along and is discharged from the lower separation port, and a second rotating flow that is generated along with the first rotating flow and rises up the upper separation pipe and is discharged to the outside. A cyclone separator that uses and separates the mixture flowing into the reduced-diameter cylindrical portion.

Moreover, the oil / sediment separation method for oil-contaminated soil according to claim 4 of the present invention is as follows:
In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
The passage through the steam ejector generated after the oil-contaminated soil is sucked by the steam ejector is filtered by a filter member and separated into oil and soil.

Moreover, the oil / sediment separation method of the oil-contaminated soil according to claim 5 of the present invention comprises:
In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
The steam ejector passing through the steam ejector discharged after the oil-contaminated soil is sucked by the steam ejector is put into a water tank containing water to float the oil on the water surface and to precipitate the soil and sand. It is characterized by separating both of them.

Moreover, the oil-sediment separation method of the oil-contaminated soil according to claim 6 of the present invention comprises:
In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
Before the oil-contaminated soil is sucked by the steam ejector, a surfactant is added to promote separation of the oil and soil.

Moreover, the oil / sediment separator for oil-contaminated soil according to claim 7 of the present invention is
Water vapor generating means for boiling water to generate water vapor;
A steam ejector for sucking an object to be sucked using a negative pressure generated in the inner chamber when the water vapor is ejected from the nozzle to the inner chamber and then discharged to the outside;
Oil-contaminated earth and sand is sucked by the steam ejector, and oil and earth and sand are separated from the oil-contaminated earth and sand.

  In the oil / sediment separation method and the oil / sediment separation device for oil-contaminated earth and sand according to the present invention, water is boiled to generate water vapor, and the water vapor is ejected from the nozzle to the inner chamber and then to the outside. The oil-contaminated earth and sand were sucked by a steam ejector that sucks the suction object using the negative pressure generated in the inner chamber when discharging. For this reason, it has the advantage that oil content can be isolate | separated from earth and sand by exposing oil-contaminated earth and sand to high temperature water vapor | steam. In addition, when the steam ejector is sucked, there is an advantage that a strong shearing force acts on the oil and the oil can be separated from the earth and sand.

  In the embodiment described below, water is generated by boiling water, and when the water vapor is ejected from the nozzle to the inner chamber and then discharged to the outside, the negative pressure generated in the inner chamber is used to suck the object to be sucked. The oil-contaminated soil was sucked by a steam ejector that sucked the water. For this reason, oil-contaminated earth and sand can be separated from the earth and sand by being exposed to high-temperature water vapor, and a strong shearing force acts on the oil when the steam ejector is sucked to separate the oil from the earth and sand. This is the best mode for realizing the present invention.

  Hereinafter, an oil / sediment separation apparatus for oil-contaminated earth and sand that is a first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an entire configuration of an oil / sediment separation apparatus for oil-contaminated sediment that is a first embodiment of the present invention. FIG. 2 is a cross-sectional view for explaining the configuration and operation of the steam ejector in the oil / sediment separator of the oil-contaminated soil shown in FIG. FIG. 3 is a cross-sectional view for explaining the configuration and operation of the cyclone separator in the oil / sediment separation apparatus for oil-contaminated soil in FIG.

  As shown in FIG. 1, an oil / sediment separation apparatus 101 for oil-contaminated sediment that is a first embodiment of the present invention includes a steam boiler 1, a steam ejector 2, a cyclone separator 3, a stirrer 4, and an oil -The earth and sand separation water tank 5 is provided and comprised.

  The steam boiler 1 has a water container 71 and a heater 72 therein. The water container 71 is a container made of metal or the like and formed in a hollow box shape or the like, and contains water (not shown) therein. The heater 72 is disposed, for example, in the lower part of the water container 71, heats the bottom of the water container 71, and heats the water inside the water container 71. Thereby, the temperature of the water in the water container 71 rises, and in a state of 1 atm (about 0.1 megapascal), it boils (vaporizes) at about 100 ° C. and becomes water vapor (not shown). The steam boiler 1 corresponds to the water vapor generating means in the claims. As the heater 72, a gas fuel such as natural gas, a liquid fuel such as heavy oil, a combustion means that uses heat when burning coal or other solid fuel, etc., and an electric resistance when energized is converted into heat. For example, electric heating means for heating can be used.

  Steam 82 (see FIG. 2; described later) generated by the steam boiler 1 is guided to the steam ejector 2 through the pipe 25a, the steam valve 26, and the pipe 25b. The steam valve 26 can adjust the cross-sectional area of the pipe, and can adjust the amount of water vapor flowing from the pipe 25a into the pipe 25b. The supply of water vapor to the ejector 2 can be stopped.

  A stirrer 4 is mounted on the upper part of the steam ejector 2. The stirrer 4 includes a hopper 7, a rotation drive source 8, a rotation shaft 9, and a blade member 10.

  The hopper 7 is made of metal or the like, and is formed in a conical tubular shape whose both ends are open (contracted) as it goes downward. The lower end 6a of the chute 6 is connected to the upper end opening 7a. The lower end opening 7b of the hopper 7 communicates with a first opening 20b (see FIG. 2, which will be described later) on the upper part of the steam ejector 2.

  Near the inner center of the hopper 7, a rotating shaft 9 is disposed so as to extend in the vertical vertical direction, and is supported so as to be rotatable about the vertical line as the center of rotation. A plurality of plate-like blade members 10 are attached around the rotation shaft 9. For example, an electric motor or the like is used as the rotational drive source 8 and is installed so as to rotationally drive the rotary shaft 9.

  The chute 6 is a bowl-shaped member and is installed so that the inner bottom surface is inclined, and the lower end 6 a is in a state of being inserted into the upper end opening 7 a of the hopper 7.

  Above the stirrer 4, a water pipe 41 c is arranged, and a water spout, which is a plurality of openings, is opened below the water pipe 41. For this reason, the water 84 sucked up by the pump 40 of the water circulation mechanism 17 to be described later is guided to the water pipe 41c through the water pipe 41a and the water pipe 41b, and is sprayed from the sprinkling port 42 to the inside of the hopper 7 of the lower stirrer 4. It is like that.

  With the configuration as described above, when the rotary drive source 8 is started, the rotary shaft 9 rotates, and the blade member 10 is accordingly moved in the hopper 7 in the direction of the arrow D1 in FIG. 1, for example (or the reverse direction of D1). Rotate to. The oil-contaminated earth and sand 81 introduced into the hopper 7 from the lower end 6a of the chute 6 is added with water 84 sprayed from the water spout 42 and is stirred by the rotating blade member 10, so that a fluid (such as mud) ( Slurry-like oil-contaminated earth and sand 81A. The oil-contaminated earth and sand 81A in the form of a slurry is sucked by the steam ejector 2.

  FIG. 2 is a cross-sectional view illustrating the configuration and operation of the steam ejector 2. As shown in FIG. 2, the steam ejector 2 includes a main body 20, a steam inflow member 21, and a discharge member 22.

  The main body 20 is a member having an inner chamber 20a that is an internal space, and a first opening 20b that is an opening communicating with the inner chamber 20a from above is formed in the upper portion of the main body 20. The first opening 20b communicates with the lower end opening 7b of the hopper 7 described above.

  Further, a second opening 20c, which is an opening communicating with the inner chamber 20a from the left side in FIG. 2, is opened on a side portion of the main body 20, for example, on the left side in FIG. A steam inflow member 21 is inserted and attached to the second opening 20c. The steam inflow member 21 is a substantially tubular member, and has a through hole formed therein. This through-hole has an opening at the steam inlet 21a, which is the left end in FIG. 2, and the inner diameter is reduced (reduced) toward the right in FIG. 2, and the portion having the smallest inner diameter is the nozzle 21b. The inner diameter increases (expands) from the nozzle 21b toward the right in FIG. 2, and has a steam outlet 21c that is an opening at the right end in FIG. The steam inlet 21a of the steam inflow member 21 communicates with the left end opening of the pipe 25b described above. In addition, the steam outlet 21 c of the steam inflow member 21 communicates with the inner chamber 20 a of the main body 20 described above.

  Further, on the side of the main body 20, for example, the right side in FIG. 2, a third opening 20d that is an opening communicating with the inner chamber 20a from the right side in FIG. A discharge member 22 is inserted and attached to the third opening 20d. The discharge member 22 is a substantially tubular member and has a through hole formed therein. This through-hole has an opening at the inlet 22a, which is the left end in FIG. 2, and becomes a diameter-reduced hole portion 22b whose inner diameter is reduced (reduced) toward the right in FIG. A hole 22c is formed, and finally, an enlarged hole 22d whose inner diameter is enlarged (expanded) is formed. And it has the discharge port 22e which is opening at the right end in FIG. The outlet 22a of the discharge member 22 communicates with the inner chamber 20a of the main body 20 described above. Further, the discharge port 22 e of the discharge member 22 communicates with the right end opening of the pipe 25 c that communicates between the steam ejector 2 and the cyclone separator 3.

  With the configuration described above, the water vapor 82 generated by the steam boiler 1 and guided to the steam ejector 2 by the pipe 25b reaches the nozzle 21b of the steam inflow member 21. In the nozzle 21b, since the inner diameter of the hole is the minimum, the water vapor 82, which is a fluid, rises from the “Bernoulli's law (principle)” in the fluid, and the water vapor pressure is ejected toward the steam outlet 21c. It enters the inner chamber 20a and tries to flow into the discharge member 22 from the inlet 22a. The cross-sectional area of the inner chamber 20a (the cross-sectional area perpendicular to the flow direction of the water vapor 82) is considerably larger than the cross-sectional area of the steam outlet 21c. For this reason, when the water vapor 82 comes into the inner chamber 20a, the pressure of the water vapor 82 is suddenly reduced. Therefore, the pressure in the vicinity of the inlet 22a of the discharge member 22 is much lower than that in the vicinity of the first opening 20b in the upper part of the main body 20, and is in a so-called “negative pressure” state, thereby generating a suction force. To do. Due to this suction force, the slurry-like oil-contaminated earth and sand 81A entering the inner chamber 20a of the steam ejector 2 from the lower end of the stirrer 4 (lower end opening 7a of the hopper 7) together with the water vapor 82 is discharged from the inlet 22a to the discharge member 22. When the fluid is sucked in and flows into the pipe 25c from the discharge port 22e of the steam ejector 2 and becomes the steam ejector passing material 83, a fluid (hereinafter referred to as "multiphase flow") in which earth and sand (solid) and water vapor (gas) are mixed. ").

  In the steam ejector 2 described above, high-temperature steam 82 enters the inner chamber 20a and flows again from the inlet 22a. At this time, the slurry-like oil-contaminated soil 81 </ b> A is exposed to the high-temperature steam 82. By this action, the oil is separated from the earth and sand. Further, the steam ejector 2 is a kind of “jet pump”, and at the time of suction, a strong “shearing force” acts on the oil content of the slurry-like oil-contaminated earth and sand 81A. This strong shearing force at the time of suction also helps to separate the oil from the earth and sand. Here, the slurry-like oil-contaminated earth and sand 81A corresponds to the suction object in the claims.

  As shown in FIG. 1, a steam ejector passing material 83 (see FIG. 2), which is a fluid (mixed-phase flow) in which water vapor and oil-contaminated earth and sand are mixed, is introduced into the cyclone separator 3 through a pipe 25 c. FIG. 3 is a cross-sectional view for explaining the configuration and operation of the cyclone separator 3.

  As shown in FIG. 3, the cyclone separator 3 includes a main body 30 and an upper separation pipe 31.

  The main body 30 has an equal diameter cylindrical portion 32 and a reduced diameter cylindrical portion 33. The equal-diameter cylindrical portion 32 is formed in a hollow cylindrical shape having the same inner diameter in the vertical vertical direction, the upper end of the equal-diameter cylindrical portion 32 is closed by the upper plate 32a, and the side portion is a cylindrical side plate 32b. The lower end is an opening 32e. Further, on the side portion of the side plate 32b of the equal diameter cylindrical portion 32, for example, on the left side in FIG. 3, a first opening 32c that is an opening communicating from the left side in FIG. The pipe 25c is attached so that the right end thereof communicates.

  Further, in the vicinity of the center of the upper plate 32a of the equal-diameter cylindrical portion 32, a second opening 32d that is an opening communicating from above in FIG. 3 is opened in the internal space, and the equal-diameter cylindrical portion 32 is formed in the second opening 32d. The upper separation pipe 31 having a smaller diameter is attached so as to be inserted. The upper separation pipe 31 extends from the vicinity of the central portion of the equal-diameter cylindrical portion 32 toward the upper outside, and the upper end thereof is connected to and connected to the pipe 25d.

  The reduced diameter cylindrical portion 33 is formed in a hollow cylindrical shape whose diameter is reduced vertically downward, and the upper end of the reduced diameter cylindrical portion 33 is connected to communicate with the lower end opening 32e of the equal diameter cylindrical portion 32, The lower end is a lower separation port 33a.

  With such a configuration, when the fluid flows in from the first opening 32c on the side portion at a high speed, the cyclone separator 3 descends while rotating along the inner wall of the equal-diameter cylindrical portion 32, and further contracts. It descends while rotating along the inner wall of the diameter tube portion 33. This vortex 88 (hereinafter referred to as “first rotating flow”) descends and is finally discharged from the lower separation port 33a. When this first rotating flow 88 occurs, the pressure decreases near the center of the first rotating flow 88. For this reason, from the vicinity of the center of the first rotating flow 88, an eddy current 89 (hereinafter referred to as “second rotating flow”) having a rotating radius smaller than that of the first rotating flow 88 and rising is generated. The second rotating flow 89 rises in the vicinity of the center of the first rotating flow 88, enters the inside from the lower end opening 31 a of the upper separation pipe 31, passes through the upper separation pipe 31, and is discharged to the outside of the cyclone separator 3. Then, it moves into the pipe 25d.

  At this time, when the fluid flowing in from the first opening 32c is composed of a mixture, a component having a relatively large weight or a component having a relatively large size (particle size, etc.) falls. The first rotating flow 88, which is a swirling flow, moves and is discharged downward from the lower separation port 33a. On the other hand, a component having a relatively small weight or a component having a relatively small size (particle size or the like) moves in the mixture by the second rotating flow 89 that is an ascending vortex and flows from the upper separation pipe 31 to the outside ( It is discharged to the pipe 25d).

  According to the principle of the cyclone separator 3, the steam ejector passing material 83, which is a fluid (mixed-phase flow) in which water vapor and oil-contaminated earth and sand are mixed, flows into the first opening 32 c, and then has an oil component with a small specific gravity and a minute amount. The oil component that has become oil droplets is moved by the second rotating flow 89 that is a rising vortex, and is discharged from the upper separation pipe 31 to the outside (pipe 25d). Moreover, the earth and sand part with large specific gravity moves by the 1st rotation flow 88 which is a descending vortex, and is discharged | emitted below from the lower separation port 33a. Here, the cyclone separator 3 corresponds to the centrifugal force separating means in the claims. Oil 85 may still adhere to the product 85 discharged from the cyclone separator 3 downward (hereinafter referred to as “pass through cyclone separator”). Such an oil component is separated by an oil / sediment separation water tank 5 (see FIG. 1) described below.

  As shown in FIG. 1, the oil / sediment separation water tank 5 is formed in a box shape with the top opened, and is inclined to become a bottom plate 51, a left side plate 52 in FIG. 1, and a right side plate in FIG. 1. A plate 53 is provided. Although not shown, a side plate constituting the side portion is provided on the front side of the paper surface of FIG. 1, and a side plate constituting the side portion is also provided on the back side of the paper surface of FIG. Yes. Water 84 is accommodated in the oil / sediment separation water tank 5 having such a configuration.

  Further, the oil / sediment separation water tank 5 has a first partition wall 11 and a second partition wall 12. The first partition wall 11 is provided on the front side of the paper surface of FIG. 1 and includes a side plate (not shown) that forms the side portion, and a side plate that is provided on the back side of the paper surface of FIG. The first partition wall 11 is open below the first partition wall 11. Further, the second partition wall 12 is provided on the near side of the paper surface of FIG. 1 and a side plate (not shown) constituting the side portion and a side plate provided on the back side of the paper surface of FIG. 1 and constituting the side portion. It arrange | positions so that it may connect between (not shown), and the upper direction of the 2nd partition wall 12 is set to the low height which does not reach the water surface S1.

  The cyclone separator passing material 85 discharged downward from the cyclone separator 3 falls to the water surface S <b> 1 between the first partition wall 11 and the side plate 52. The oil remaining in the cyclone separator passing material 85 floats on the water surface S1 and becomes an oil layer 86 because of its low specific gravity.

  An opening is provided in the bottom plate 51 in the region partitioned by the second partition wall 12, and a water distribution pipe 60, a drain valve (valve) 61, and a water distribution pipe 62 are connected to the bottom opening. An oil adsorbing member 16 is installed in the water in the region partitioned by the second partition wall 12. As the oil adsorbing member 16, a filter made of a porous pumice member, a nonwoven fabric, or the like can be used.

  With such a configuration, when the drain valve 61 is opened to gently drain water, the oil layer 86 on the water surface S1 gradually moves to the area partitioned by the second partition wall 12 and passes through the oil adsorbing member 16. , Oil is adsorbed.

  A belt conveyor 14 is installed on the bottom plate 51 of the oil / sediment separation water tank 5. A belt conveyor 15 is installed on the inclined plate 53 of the oil / sediment separation water tank 5 so as to communicate with the belt conveyor 14. For this reason, of the cyclone separator passing material 85 that has been discharged downward from the cyclone separator 3 and dropped onto the water surface S1 between the first partition wall 11 and the side plate 52, the remaining earth and sand content where the oil component has floated has a specific gravity. Since it is heavy, it settles downward (see reference numeral 87 in FIG. 1). The sedimented sediment 87 is conveyed by the belt conveyors 14 and 15 and dropped into the sediment collection container 13 outside the oil / sediment separation water tank 5 (see reference numeral 87A in FIG. 1).

  Further, the water 84 in the oil / sediment separation water tank 5 is sucked up by the pump 40 of the water circulation mechanism 17, led to the water pipe 41 c through the water pipe 41 a and the water pipe 41 b, and the hopper of the lower stirrer 4 from the water spout 42. 7 is sprayed inside.

  Although not shown in the figure, the oil conveyed from the upper separation pipe 31 of the cyclone separator 3 through the pipe 25d is guided to a container, a filter, an oil adsorbing member, etc., and is configured to collect the oil. That's fine. Moreover, when the earth and sand content is contained in the thing conveyed via the piping 25d from the upper separation pipe 31 of the cyclone separator 3, it is comprised so that the earth and sand content may be returned to the stirrer 4 again. Also good.

  In addition, this invention is not limited to the said Example. The above-described embodiment is an exemplification, and the present invention has the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present embodiment. It is included in the technical scope of the invention.

  For example, the oil-contaminated earth and sand in the present invention is not limited to the earth and sand contaminated with oil that has flowed out due to an oil tanker maritime accident. The soil was excavated when collecting crude oil from oil fields, earth and sand contaminated by oil spilled due to damage to oil tanks and heavy oil tanks on the ground, oil and sand leaked from oil tanks, etc. It can also be applied to oilfield excavation earth and sand generated at the time.

  Further, the present invention generates water vapor by boiling water, and sucks an object to be sucked using negative pressure generated in the inner chamber when the water vapor is ejected from the nozzle to the inner chamber and then discharged to the outside. It is established only by sucking oil-contaminated soil with a steam ejector. As described above, when oil-contaminated earth and sand are aspirated rapidly into the steam ejector, the oil-contaminated earth and sand are exposed to high-temperature steam, so that the oil can be separated from the earth and sand, and during the suction of the steam ejector, This is because a strong shearing force acts on the oil and helps to separate the oil from the sediment. Therefore, at the time of passing through the steam ejector, the oil content and the soil content of the oil-contaminated sediment have already been separated. That is, the steam ejector according to the present invention is not an oil-contaminated sediment suction means or a transport means, but an apparatus that should be a physical property alteration means for treating the physical properties of the oil-contaminated sediment, that is, physical properties and chemical properties. is there. If only the oil-contaminated earth and sand is transported from the hopper 7 to the cyclone separator 3, other known transport means such as a belt conveyor may be used, and in order to put it into the cyclone separator 3, This is because a gas such as air at normal temperature (compressed air) may be used as the ejector driving fluid. Therefore, the steam ejector passing material 83 is not directly passed through the cyclone separator 3 but directly from the steam ejector 2 into a water tank such as the oil / sediment separation water tank 5, and the oil / sediment caused by the difference in specific gravity (floating and sedimentation). Separation may be performed.

  After passing through the steam ejector, the oil component may be separated by other separation means. For example, the steam ejector passing material 83 may be placed on a filter (filter) member such as a porous pumice member, a non-woven fabric filter, and filtered by osmotic dropping due to gravity. Alternatively, the steam ejector passing material 83 is placed on a filter (filter) member such as a porous pumice member, a non-woven fabric filter, and pressure is applied from above, or suction is performed from below the filter (filter) member. For example, the filtration may be forcibly performed. Alternatively, the steam ejector passing material 83 may be put into a known centrifugal force separation means other than the cyclone separator, and oil / sand separation by centrifugal force may be performed.

  Further, the steam ejector may be connected in multiple stages, for example, after being inserted into the steam ejector after the steam ejector.

  Further, before passing through the steam ejector, a pre-process for removing oil in advance may be performed by putting it in a water tank such as the oil / sediment separation water tank 5 or passing it through the cyclone separator 3. Alternatively, as shown in FIG. 1, a surfactant supplier 78, piping 75 and 77, and a valve 76 are provided in the middle of the piping 25b in front of the steam ejector 2, and a surfactant (not shown) is appropriately used. You may comprise so that it may add to. If comprised in this way, it will become possible to further promote the separation of oil and earth and sand. Although not shown, the surfactant supplier 78 has a container containing the surfactant and a pump for sending the surfactant to the pipe 77 inside.

  The present invention can be implemented in industries that separate oil and soil from oil-contaminated soil and the like, and can be used in these industries.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of the oil and earth and sand separation apparatus of the oil pollution earth and sand which is 1st Example of this invention. It is sectional drawing explaining the structure and effect | action of a steam ejector in the oil-sediment separation apparatus of the oil pollution earth and sand which is 1st Example of this invention. It is sectional drawing explaining the structure and effect | action of a cyclone separator in the oil and earth and sand separator of the oil-contaminated earth and sand which is 1st Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steam boiler 2 Steam ejector 3 Cyclone separator 4 Stirrer 5 Oil / sand separation tank 6 Chute 6a Lower end 7 Hopper 7a Upper end opening 7b Lower end opening 8 Rotation drive source 9 Rotating shaft 10 Blade member 11 First partition wall 12 Second partition Wall 13 Sediment collection container 14, 15 Belt conveyor 16 Oil adsorbing member 17 Water circulation mechanism 20 Main body 20a Inner chamber 20b First opening 20c Second opening 20d Third opening 21 Steam inflow member 21a Steam inlet 21b Nozzle 21c Steam outlet 22 Discharge member 22a Inlet 22b Reduced diameter hole 22c Equal diameter hole 22d Expanded diameter hole 22e Discharge port 25a-25d Pipe 26 Steam valve 30 Main body 31 Upper separation pipe 31a Lower end opening 32 Equal diameter cylinder part 32a Upper plate 32b Side plate 32c First opening 32d Second opening 32e Lower end opening 33 Reduced diameter cylindrical portion 33a Side separation port 40 Pump 41a to 41c Water pipe 42 Sprinkling port 51 Bottom plate 52 Side plate 53 Inclined plate 60 Drain pipe 61 Drain valve 62 Drain pipe 71 Water container 72 Heater 75 Piping 76 Valve 77 Piping 78 Surfactant feeder 81 Oil contaminated earth and sand 81A Slurry oil-contaminated earth and sand 82 Water vapor 83 Steam ejector passing material 84 Water 85 Cyclone separator passing material 86 Oil layer 87, 87A Earth and sand 88 First rotating flow 89 Second rotating flow 101 Oil / sand separating device S1 of oil-contaminated earth and sand S1, S2 Water surface

Claims (7)

  Steam is generated by a steam ejector that sucks an object to be sucked by using a negative pressure generated in the inner chamber when the water is boiled to generate water vapor and discharged from the nozzle to the inner chamber and then discharged to the outside. A method for separating oil / sediment from oil-contaminated sediments, comprising sucking the contaminated sediments and separating oil and sediment from the oil-contaminated sediments. In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
The oil-contaminated sediment is discharged after being sucked by the steam ejector, and the material passing through the steam ejector is placed in a centrifugal force separating means for separating using centrifugal force to separate the oil and the soil. Oil / sediment separation method for oil-contaminated soil. In the oil-sediment separation method of the oil-contaminated soil according to claim 2,
The centrifugal force separating means has a diameter-reduced cylindrical portion that is reduced in diameter toward the lower separation port, and an upper separation pipe that extends from the vicinity of the center portion toward the upper outside, and is provided on the inner wall of the reduced-diameter cylindrical portion. A first rotating flow that descends while rotating along and is discharged from the lower separation port, and a second rotating flow that is generated along with the first rotating flow and rises up the upper separation pipe and is discharged to the outside. An oil / sediment separation method for oil-contaminated earth and sand, characterized in that it is a cyclone separator for separating the mixture flowing into the reduced-diameter cylindrical portion. In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
The oil-contaminated soil oil / sediment is characterized by filtering the steam ejector passing material generated after being discharged after the oil-contaminated soil is sucked by the steam ejector, and separating the oil-contaminated soil into oil and soil. Separation method. In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
The steam ejector passing through the steam ejector discharged after the oil-contaminated soil is sucked by the steam ejector is put into a water tank containing water to float the oil on the water surface and to precipitate the soil and sand. Oil / sediment separation method for oil-contaminated sediment characterized by separating the two by In the oil-sediment separation method of the oil-contaminated soil according to claim 1,
A method of separating oil / sediment from oil-contaminated soil, wherein a surfactant is added before the oil-contaminated soil is sucked by the steam ejector to promote separation of the oil and soil. Water vapor generating means for boiling water to generate water vapor;
A steam ejector for sucking an object to be sucked using a negative pressure generated in the inner chamber when the water vapor is ejected from the nozzle to the inner chamber and then discharged to the outside;
An oil / sediment separation apparatus for oil-contaminated sediment, wherein oil-contaminated sediment is sucked by the steam ejector and oil and sediment are separated from the oil-contaminated sediment.

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