JP2005219037A - Floating oil recovery method and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floating oil recovery method and an apparatus therefor for recovering by floating foreign matter, mainly consisting of oil contained in liquid mainly consisting of water, in more details, for completely recovering foreign matter mainly consisting of oil incorporated in water by depositing and floating the foreign matter on the surface of fine bubbles occurring by discharging air-dissolved liquid of high concentration into the liquid mainly consisting of water. <P>SOLUTION: In the case of recovering the foreign matter mainly consisting of oil incorporated in liquid mainly consisting of water, foreign matter is recovered from bubbles on which the floated foreign matter is deposited by depositing and floating the foreign matter mainly consisting of oil incorporated in the liquid mainly consisting of water on the surface of fine bubbles occurring by discharging air-dissolved liquid of high concentration into the liquid mainly consisting of water. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a floating oil recovery method and apparatus for levitating and collecting foreign matters centered on oil contained in a liquid centered on water. More specifically, the present invention relates to a liquid centering on water. This is a technique for completely recovering foreign matters by adhering and floating foreign matters, mainly oil contained in water, on the surface of fine bubbles that appear by releasing a high-concentration air solution.

  Conventionally, as a technique related to a floating oil recovery method and apparatus for levitating and recovering foreign matters centered on oil contained in a liquid centered on water, the oil floating on the liquid surface flows out from the floating oil recovery port. The one with the structure waiting for was common. In that case, the floating oil recovery port through which the oil floating on the liquid surface flows out is fixed and positioned near the liquid surface of the recovery device.

  However, the conventional floating oil recovery method and apparatus have the following problems.

  First, when collecting floating oil, if the oil is emulsified, it may not float to the liquid surface. In addition, it took time to float on the liquid surface.

  Secondly, in the vicinity of the floating oil recovery port, a flow path is formed and the oil floating on the liquid level is discharged as needed, but at a position far from the floating oil recovery port, the oil floating on the liquid level stagnates, As a result, the oil that floated rotted along with foreign substances, which contaminated the liquid level and even gave off a terrible odor.

  Third, the floating oil recovery port that discharges the floating oil that has floated to the liquid level was positioned near the liquid level, but if the floating oil recovery port was made higher than the liquid level, the stagnation time of the oil that floated to the liquid level As a result, the floating oil may rot along with foreign substances, contaminating the liquid level, and giving off a terrible off-flavor, and if the floating oil recovery port is made lower than the liquid level, the oil contains a lot of water. Was sometimes discharged.

  The present invention relates to a floating oil recovery method for levitating and recovering foreign matters centered on oil contained in a liquid centered on water, and releasing a high-concentration air solution into the liquid centered on water. It is characterized in that a foreign substance centered on oil contained in a liquid centered on water adheres and floats on the surface of fine bubbles that appear by collecting the foreign substance from the bubbles attached to the floating foreign substance. Furthermore, the method for collecting foreign matter has the property that the metal belt 62 rotates and moves between below the liquid level L and in the air, so that the metal belt 62 easily removes water and easily attaches foreign matter mainly oil. Further, the foreign matter centered on oil that is attached to the metal belt 62 and pulled up in the air is separated from the metal belt 62 and collected in the air. As a feature, The method of collecting is to generate a wave on the liquid level L by large bubbles appearing by releasing a high-concentration air-dissolved liquid in a liquid centered on water, and the bubbles to which foreign substances adhering due to the bubbles are attached to the liquid surface L. The above problem has been solved by the fact that the oil is recovered by going over the weir floating oil recovery port 51b located at a position slightly higher than the surface L.

  The present invention also relates to a floating oil recovery apparatus that floats and collects foreign matter mainly oil, which is contained in a liquid centered on water, and a water separation tank 40 for storing a liquid centered on water, and the water A vortex pump 21 for aspirating and agitating a liquid, mainly air and water, in order to release a highly concentrated air solution for the purpose of creating fine bubbles and large bubbles in the separation tank 40; A separation tank 31 that separates large bubbles downstream of the vortex pump 21 and a floating oil collecting means 60 that collects bubbles with foreign matters centered on the floating oil are provided. The oil recovery means 60 is provided with a metal belt 62 having a property of easily removing water and easily adhering foreign matters centered on oil so as to be rotatable between the liquid level L and the air. Dissimilar to oil that is attached and pulled up into the air In a floating oil recovery apparatus for separating and recovering foreign matters centered on oil contained in a liquid centered on water, the separating means 67 for separating the water is further provided. A water separation tank 50 for storing a liquid centered on the liquid, and a liquid centered on air and water for releasing a high-concentration air solution for the purpose of creating fine bubbles and large bubbles in the water separation tank 50 And a vortex pump 21 for agitation and pressurization, and floating oil recovery means 51b and 52 for recovering bubbles to which foreign matters centered on the floating oil are disposed. The oil recovery means 51b, 52 includes a narrowing plate 52 disposed so that the fluid flow smoothly rises in the vicinity of the liquid level L, and a floating oil outlet 51b with a weir positioned slightly higher than the liquid level L. By providing We had to solve the above problems.

  As is clear from the above description, the present invention can provide the following effects.

  First, foreign matter centered on oil contained in liquid centered on water adheres and floats on the surface of fine bubbles that appear by releasing high-concentration air-dissolved liquid into liquid centered on water. By doing so, it became very effective especially for emulsified oil contained in a liquid centered on water. That is, the emulsified oil can be surely floated early.

  Secondly, floating oil recovery means that allows the metal belt to rotate between the liquid level and the air, and large bubbles and narrow plates that emerge when high-concentration air solution is released into the water and levitation with a weir By the floating oil collecting means constituted by the oil collecting port, it has become possible to collect only the floating oil without causing the floating oil to stay in a specific place.

  Thirdly, by positioning the floating oil recovery port with the weir higher than the liquid level, it has become possible to discharge only the floating oil.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Here, FIG. 1 is an overall view of the present invention, FIG. 2 is an AA sectional view of FIG. 1, FIG. 3 is an overall view of another embodiment of the present invention, and FIG. FIG. 5 is a plan view of the water separation tank main body of FIG. 3, and FIG. 5 is a side view of the water separation tank main body of FIG.

(First embodiment)
As shown in FIGS. 1 and 2, reference numeral 40 denotes a water separation tank, which is constituted by a water separation tank body 41 having a water inlet 41 a, and drain generated from compressed air produced from a water pipe 81 by an air compressor. A liquid containing foreign matter including emulsified oil such as water flows in through the water inlet 41a.

  On the other hand, a suction pipe 82 and an air solution pipe 84 are connected to the water separation tank 40. In this case, the suction pipe 82 is connected to the vortex pump 21 after the air suction pipe 83 having the open / close valve 22 that can be manually opened and closed is joined to the suction pipe 82.

  The vortex pump 21 can transmit the rotational motion of the motor 11 by the coupling 12. Accordingly, the vortex pump 21 performs agitation and pressurization by sucking air and water in order to produce a high-concentration air solution. Further, the vortex pump 21 is connected to an air solution pipe 84 to send out a high concentration air solution.

  Here, in the middle of the air solution pipe 84 located between the vortex pump 21 and the water separation tank 40, there are a pressure gauge 23 for displaying the pressure of the pipe line and an air vent for releasing large bubbles to the atmosphere. In addition, a separation tank 31 for the purpose of enhancing gas dissolution by holding the pressure for a certain period of time and an on-off valve 32 that can be manually opened and closed are arranged.

  The water separation tank 40 is provided with a floating oil collecting means 60. In this case, the floating oil collecting means 60 has a property that the motor 61 and the water are easily removed and foreign matters centered on the oil are easily attached, and the metal belt is disposed rotatably between the liquid surface L and the air. The motor 61 is separated from the bearing 65 that supports the shaft of the lower wheel 64 with a shaft positioned on the back surface of the water separation tank main body 41 and the upper wheel 63 with the shaft that supports the metal belt 62 and the lower wheel 64 with the shaft. It comprises a motor mounting column 66 supported and fixed to the tank body 41, a peeling means 67 for scraping off the oil adhering to the metal belt 62 and guiding the floating oil downward, and a floating oil recovery tank 68 for storing the floating oil. Has been.

  However, the metal belt 62 may be a cloth belt, and the metal belt 62, the shaft-equipped upper wheel 63, and the shaft-equipped lower wheel 64 are integrated so as to be rotatable between the liquid level L and the air. It is possible to replace it with a metal wheel or wooden wheel.

  By the way, in the water separation tank 40, the emulsified oil contained in the liquid centering on water adheres to the surface of fine bubbles and rises toward the liquid level L as floating oil, Clean water is stored at the bottom. Therefore, this clean water is fed into the oil adsorption tank 70 via the treated water pipe 85 opened to the atmosphere. In this case, the oil adsorbing tank 70 is filled with a mixture of an emulsion breaking oil adsorbing material that adsorbs oil by causing emulsion destruction with amine attached thereto and an oil adsorbing material that adsorbs oil.

  In addition, a space is formed in the oil adsorption tank 70 so that it is difficult to form a specific flow path in the upper part and the lower part.

  Finally, the liquid that has passed through the oil adsorption tank 70 can be discharged with clean water that can be drained into the river as it is by the fresh water pipe 86.

  Here, the shapes of the treated water pipe 85 and the fresh water pipe 86 are apparent from FIG. 1, but the liquid level L, the upper pipe located horizontally of the treated water pipe 85, and the fresh water pipe 86 are horizontal. As for the pipes located at the same position, they may be the same position, or only the fresh water pipe 86 may be located slightly lower.

  The floating oil recovery method and apparatus according to the present invention is configured as described above, and the operation thereof will be described below.

  First, the water separation tank main body 41 constituting the water separation tank 40 includes foreign matters including oil that has been emulsified such as drain water generated from compressed air produced by the air compressor from the water inlet 41a through the water pipe 81. The washing water used in the factory where the liquid or oil is used is poured, and the motor 11 is operated.

  Here, the eddy current pump 21 connected by the coupling 12 by the operation of the motor 11 is also operated at the same time, and the water in which the foreign matter centering on the oil in the water separation tank main body 41 is mixed is mainly centered through the suction pipe 82. Circulate the liquid. At the same time, air can be sucked by opening the on-off valve 22 disposed in the air suction pipe 83, and air and water are sucked by the vortex pump 21 and stirred and pressurized to dissolve high concentration air. It is possible to create a liquid.

  In this case, the high-concentration air solution created by the vortex pump 21 can produce two types of bubbles, fine bubbles and large bubbles. For example, a fine bubble has a content of “looks cloudy” when expressed in a visual condition.

  Therefore, by passing this high-concentration air solution through the separation tank 31 with an air vent, it becomes possible to delete large bubbles by releasing the large bubbles to the atmosphere with an air vent. By maintaining the pressure in the separation tank 31 for a certain period of time, it is possible to further enhance the dissolution of the gas.

  In this way, when a high-concentration air-dissolved liquid capable of creating only fine bubbles is sent to the water separation tank 40, the high-concentration air-dissolved liquid is decompressed at a stretch and released while suppressing the liquid flow rate. As a result, supersaturated air appears as fine bubbles, and the emulsified oil in water adheres to the fine bubbles and floats on the liquid level L.

  On the other hand, the foam to which the foreign matter centered on the oil floating on the liquid level L adheres causes the shaft 61 to rotate by rotating the motor 61 constituting the floating oil collecting means 60, thereby The metal belt 62 hung between the upper wheel 63 with the shaft and the lower wheel 64 with the shaft is rotated and moved between below the liquid level L and in the air. The oil is attached to the metal belt 62 by utilizing the easy characteristics, and the oil lifted in the air is scraped off by the peeling means 67 to remove the oil in the floating oil recovery tank 68 thereafter. It is poured.

  By the way, the water from which most of the oil accumulated in the bottom of the water separation tank 40 has been removed is fed into the oil adsorption tank 70 via the treated water pipe 85.

  Finally, in the oil adsorption tank 70, emulsion breakage is caused by the action of the emulsion breaking oil adsorbent to which the amine is attached, so that the oil is aggregated into a large oil, and the emulsion broken oil is adsorbed by the action of the oil adsorbent. . In this way, clean fresh water from which foreign matters such as oil are removed is discharged from the fresh water pipe 86.

(Second embodiment)
As shown in FIGS. 3 to 5, reference numeral 50 denotes a water separation tank, which is a water separation having a partition plate 51c formed for the purpose of eliminating the influence of a water inlet 51a, a levitation oil recovery port 51b with a weir and large bubbles. It is constituted by the tank body 51, and a liquid containing foreign matter including emulsified oil such as drain water generated from compressed air created by an air compressor from the water pipe 81 flows in through the water inlet 51a. ing.

  On the other hand, a suction pipe 82 and an air solution pipe 87 are connected to the water separation tank 50. In this case, the suction pipe 82 is connected to the vortex pump 21 after the air suction pipe 83 having the open / close valve 22 that can be manually opened and closed is joined to the suction pipe 82.

  The vortex pump 21 can transmit the rotational motion of the motor 11 by the coupling 12. Accordingly, the vortex pump 21 performs agitation and pressurization by sucking air and water in order to produce a high-concentration air solution. Further, the vortex pump 21 is connected to an air solution pipe 87 and sends out a high concentration air solution.

  Here, in the middle of the air solution pipe 87 located between the vortex pump 21 and the water separation tank 50, a pressure gauge 23 for displaying the pressure of the pipe line is arranged. However, it is also conceivable to install a pressurized tank without an air vent in the middle of the air solution pipe 87 for the purpose of enhancing gas dissolution by maintaining the pressure for a certain time.

  In the water separation tank 50, floating oil collecting means 51 b and 52 are disposed near the liquid level L. In this case, the floating oil collecting means 51b and 52 are provided with a floating oil collecting port 51b with a weir that is located slightly above the liquid level L and collects the floating oil that has floated, and the floating oil that floats near the liquid level L It is composed of a narrow plate 52 that is considered to gather at the attached floating oil recovery port 51b.

  However, although not specifically described in FIGS. 3 to 5, it is seen between the outer side of the narrowing plate 52 and the inner side of the water separation tank main body 51 (see the right triangle on the outer side of the narrowing plate 52 shown in FIG. 4). It is necessary to prevent fine bubbles with foreign matter from staying in the space. For that purpose, it is conceivable that the liquid pipe 81 is extended to the narrow plate 52 and the water inlet 51 a is formed at the narrow plate 52 so that the liquid does not flow into the space.

  In addition, since it becomes the same content as 1st embodiment regarding the oil adsorption tank 70, the treated water piping 85, and the fresh water pipe 86, it abbreviate | omits here.

  The floating oil recovery method and apparatus according to the present invention is configured as described above, and the operation thereof will be described below.

  First, the water separation tank main body 51 constituting the water separation tank 50 contains foreign matters including emulsified oil such as drain water generated from compressed air produced by the air compressor from the water inlet 51a through the water pipe 81. The washing water used in the factory where the liquid or oil is used is poured, and the motor 11 is operated.

  Here, the vortex pump 21 connected by the coupling 12 by the operation of the motor 11 is also operated at the same time, and the water in which the foreign matter mainly the oil in the water separation tank main body 51 is mixed is mainly centered through the suction pipe 82. Circulate the liquid. At the same time, air can be sucked by opening the on-off valve 22 disposed in the air suction pipe 83, and air and water are sucked by the vortex pump 21 and stirred and pressurized to dissolve high concentration air. It is possible to create a liquid.

  In this case, the high-concentration air solution created by the vortex pump 21 can produce two types of bubbles, fine bubbles and large bubbles. For example, a fine bubble has a content of “looks cloudy” when expressed in a visual condition.

  In this way, when a high-concentration air-dissolved liquid capable of creating fine bubbles and large air bubbles is fed into the water separation tank 50, the high-concentration air-dissolved liquid is decompressed at a stretch, while suppressing the liquid flow rate. Air that has become supersaturated due to discharge appears as fine bubbles and large bubbles, and the emulsified oil in water adheres to the fine bubbles and floats on the liquid level L. A wave is caused to L.

  On the other hand, bubbles with foreign matter centered on oil floating on the liquid level L are caused by waves on the liquid level L due to large bubbles and a weir as floating oil recovery means 51b by a narrowing plate 52 as floating oil recovery means 52. When the flow path toward the floated oil recovery port 51b is narrowed, the liquid level L rises and is discharged from the floated oil recovery port 51b with the weir located at a position slightly higher than the liquid level. It is sent to a floating oil recovery tank or the like not specifically described.

  By the way, the water from which most of the oil accumulated in the bottom of the water separation tank 40 has been removed is fed into the oil adsorption tank 70 via the treated water pipe 85. In this case, since the partition plate 51c is formed in the lower part of the water separation tank main body 51, the water flowing into the treated water pipe 85 is not affected by large bubbles. It should be noted that the partition plate 51c can be applied to the first embodiment.

  Finally, in the oil adsorption tank 70, emulsion breakage is caused by the action of the emulsion breaking oil adsorbent to which the amine is attached, so that the oil is aggregated into a large oil, and the emulsion broken oil is adsorbed by the action of the oil adsorbent. . In this way, clean fresh water from which foreign substances such as oil are removed is discharged from the fresh water pipe 86.

  Overall view of the present invention   AA sectional view of FIG.   Overall view of another embodiment of the present invention   Plan view of the water separation tank main body of FIG.   Side view of the water separation tank main body of FIG.

Explanation of symbols

11 .... Motor 12 .... Coupling 21 ... Vortex pump 22 .... Open / close valve 23 ...... Pressure gauge 31 ······· Separation tank 32 ········ Open / close valve 40 ········ Water separation tank 41 ·········· Water separation tank body 41a ··· Water flow Inlet 50 ········ Water separation tank 51 ········ Water separation tank body 51a ···· Water inlet 51b ··· Floating oil recovery port with weir (floating oil recovery means)
51c ... Partition plate 52 ... Narrow plate (Floating oil recovery means)
60 .... Floating oil recovery means 61 ... Motor 62 ... Metal belt 63 ... Upper wheel with shaft 64 ...・ Lower wheel with shaft 65 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bearing 66 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Motor mounting column 67 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Peeling means 68 ・ ・ ・ ・ ・ ・ ・ Floating oil recovery tank 70 ・ ・・ ・ ・ ・ ・ Oil adsorption tank 81 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Water piping 82 ・ ・ ・ ・ ・ ・ ・ Suction tube 83 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Air suction tube 84 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Air solution Piping 85 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Treatment water piping 86 ・ ・ ・ ・ ・ ・ Clear water pipe 87 ・ ・ ・ ・ ・ ・ Air dissolved solution piping 88 …… ・ ・ Floating oil recovery connection L ・ ・······Liquid surface

Claims (8)

  Appears by releasing a high-concentration air-dissolved liquid into a liquid centered on water in a floating oil recovery method that floats and collects foreign substances, mainly oil, contained in a liquid centered on water. Floating oil recovery, characterized in that a foreign object centered on oil contained in a liquid centered on water adheres to and floats on the surface of fine bubbles, and the foreign object is recovered from the bubbles with the attached foreign object Method.   The method for collecting the foreign matter is that the metal belt (62) is rotated and moved between the liquid level (L) and the air, so that the metal belt (62) easily removes water and easily attaches foreign matter mainly oil. The method for recovering a floating oil according to claim 1, wherein the method utilizes properties.   The foreign matter centered on oil that is attached to the metal belt (62) and pulled up in the air is separated from the metal belt (62) and collected in the air. Floating oil recovery method.   In the method of collecting foreign matter, a wave is generated on the liquid surface (L) by large bubbles appearing by releasing a high-concentration air-dissolved liquid in a liquid centered on water, and the foreign matter that has floated thereby adheres to it. The floating oil recovery according to claim 1, wherein the bubbles are recovered by overcoming a weir floating oil recovery port (51b) positioned slightly higher than the liquid level (L). Method.   In a floating oil recovery apparatus for levitating and recovering foreign matters centered on oil contained in a liquid centered on water, a water separation tank (40) for storing liquid centered on water, and the water separation tank ( 40) a vortex pump (21) that sucks and agitates and pressurizes liquids, mainly air and water, in order to release a high-concentration air solution for the purpose of creating fine bubbles and large bubbles. A separation tank (31) for separating large bubbles downstream of the vortex pump (21), and a floating oil collecting means (60) for collecting bubbles with foreign matters, mainly floating oil, are provided. Floating oil recovery device.   The floating oil recovery means (60) has a metal belt (62) having a property of easily removing water and easily adhering to foreign matters such as oil so as to be rotatable between the liquid level (L) and the air. The floating oil according to claim 5, further comprising a peeling means (67) for peeling foreign matter centered on the oil attached to the metal belt (62) and pulled up in the air. Recovery device.   In a floating oil recovery apparatus for levitating and recovering foreign matters centered on oil contained in a liquid centered on water, a water separation tank (50) for storing a liquid centered on water, and the water separation tank ( 50) a vortex pump (21) that sucks liquid, mainly air and water, and stirs and pressurizes in order to release a high-concentration air solution for the purpose of creating fine bubbles and large bubbles. A floating oil recovery device, wherein floating oil recovery means (51b, 52) for recovering bubbles with foreign matter attached, centering on the floating oil, is provided.   The floated oil recovery means (51b, 52) is positioned slightly above the liquid level (L) and the narrow plate (52) disposed so that the fluid flow smoothly rises in the vicinity of the liquid level (L). The floating oil recovery apparatus according to claim 7, wherein a floating oil outlet (51b) with a weir is provided.

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