JP6222446B2 - Oil removing device and oil removing method - Google Patents

Description

  In order to prevent drainage containing oil from flowing into a predetermined drainage washing route of a wastewater treatment apparatus possessed by a facility such as a thermal power plant, the present invention is designed to remove oil contained in drainage, particularly oil drifting on the surface of drainage. The present invention relates to an oil removing device suitable for removing oil and a method for removing oil using the oil removing device.

  Wastewater generated in a power generation facility (also referred to as a power plant) such as a thermal power plant includes relatively clean steady wastewater and relatively dirty unsteady wastewater, as shown in Patent Document 1, for example. As shown in the waste water treatment device of Patent Document 1, for example, the waste water becomes treated water through the first route of the coagulation reaction tank, the circulation tank, and the membrane separation device, and then is sent to the outside. Thus, before entering the first route, the unsteady waste water passes through the second route consisting of a pH adjustment tank, a solid-liquid separator, etc., so that the oil content in the unsteady waste water is the first. Suppresses entering the route.

  However, there is a possibility that unsteady waste water from which oil is not sufficiently removed due to troubles in the waste water treatment apparatus may enter the first route. In this case, for example, a coagulation sedimentation tank or other first route is configured. Since the tank (hereinafter referred to as a coagulation sedimentation tank or the like) does not have a function of excluding oil to the outside, the oil stays in the coagulation sedimentation tank or the like. This will hinder processing. In general, there is no instrument for measuring the oil content in the coagulation sedimentation tank or the like, so it is not easy to monitor the infiltration of oil into the coagulation sedimentation tank or the like. Furthermore, even if an operator accidentally discovers an oil film in a coagulation sedimentation tank or the like, it is extremely troublesome for the worker to manually collect the oil film.

  In this regard, in a coagulation sedimentation tank or the like, it is conceivable to use an oil film recovery apparatus disclosed in Patent Document 2, for example, to recover the oil film drifting on the surface of the drainage and to remove oil from the coagulation sedimentation tank or the like. An oil film recovery device disclosed in Patent Document 2 includes a suction mechanism such as a suction pump that sucks and recovers an oil film, a suction hose extending from the suction mechanism toward the water surface, and a support body that fixes a tip portion of the suction hose. And a floating mechanism such as a float for floating the support on the water surface. The suction port of the suction hose is located at a height of 5 mm to 200 mm from the water surface.

JP-A-10-28994 JP 2000-176450 A

  However, in the oil film recovery apparatus disclosed in Patent Document 2, since a suction mechanism such as a suction pump is considered to be operated by a motor or the like, a power source is required, and further from the suction port of the suction hose located at a height of 5 mm to 200 mm from the water surface. Since the oil film is sucked up to the suction mechanism, the oil film recovery device as a whole requires a relatively high height, resulting in an oil film recovery device that is large and complicated, and this increases the manufacturing cost of the oil film recovery device. There is a problem. Moreover, in such a large-sized oil film collection | recovery apparatus shown by patent document 2, it is not easy to install in an existing coagulation sedimentation tank etc. as it is.

  Therefore, the present invention has a simple structure with a small height and a small structure, and an oil removing device that can be installed in a required tank constituting an existing coagulation sedimentation tank, other waste water treatment apparatus, and this oil removing apparatus. It is an object of the present invention to provide a method for removing oil used.

The oil removing device according to the present invention is for recovering and removing oil floating on the liquid surface of the liquid stored in the liquid storage structure, and a shaft bar erected rotatably on the liquid storage structure; An arm portion extending in a radial direction from the shaft rod, wherein the arm portion has a space formed therein, and an opening portion communicating with the space is provided on a side portion standing on the liquid surface. , the lower end of the opening, the reservoir rather low level of the liquid which is accumulated in the structure is the oil trapped instrument arranged to capture oil having entered the space through the opening into the space is characterized in that there (claim 1). The liquid storage structure is, for example, a coagulation sedimentation tank of a wastewater treatment device of a power plant, and the liquid stored in the liquid storage structure is, for example, wastewater discharged from the power plant. There may be one opening or a plurality of (for example, three) openings. It is preferable that the opening is opened at a side portion of the side portion erected with respect to the liquid surface of the arm portion, which is a side on which the liquid circulating in the liquid storage structure hits. The oil component is an oil film floating on the surface of the liquid stored in the liquid storage structure or an oil component floating in a ball shape on the surface of the liquid stored in the liquid storage structure. The oil capturing device is also referred to as an oil catcher, and corresponds to, for example, an oil adsorbing sheet and other oil adsorbing members. The oil catching device can be freely attached to the arm portion by attaching it to the arm with a mounting bracket or a clip.

Thus, the oil floated on the liquid surface of the liquid stored in the liquid storage structure is provided on the side of the arm portion by rotating the shaft rod and swinging the arm portion left and right with the shaft rod as a base point. Since the oil is recovered from the opening into the space of the arm, oil can be removed from the liquid stored in the liquid storage structure. In addition, the height of the shaft rod erected on the liquid storage structure so that it can rotate is only required if the lower end of the opening of the arm portion extending from the shaft rod is lower than the liquid level of the liquid stored in the liquid storage structure. The height of the oil removing device does not need to be so high, and the shaft rod can be manually rotated, so that the structure of the oil removing device is not complicated. And since it only needs to attach a shaft rod to a liquid storage structure rotatably, an oil content removal apparatus can be attached to an existing liquid storage structure as it is. Furthermore, since the oil that has entered the space of the arm part is captured by the oil capture device, the oil capture device that has sufficiently captured the oil is removed from the arm part and discarded, and the oil content is removed from the arm part space of the oil removal device. It is possible to discard the oil collected in the outside.

The oil removing device according to the present invention is for recovering and removing oil floating on the liquid surface of the liquid stored in the liquid storage structure, and a shaft bar erected rotatably on the liquid storage structure; An arm portion extending in a radial direction from the shaft rod, wherein the arm portion has a space formed therein, and an opening portion communicating with the space is provided on a side portion standing on the liquid surface. The lower end of the opening is lower than the liquid level of the liquid stored in the liquid storage structure, and a guide member for guiding oil to the opening is provided at the shaft rod side end of the opening. The member is characterized by extending obliquely away from the opening toward the side opposite to the shaft bar (Claim 2). The liquid storage structure is, for example, a coagulation sedimentation tank of a wastewater treatment device of a power plant, and the liquid stored in the liquid storage structure is, for example, wastewater discharged from the power plant. There may be one opening or a plurality of (for example, three) openings. It is preferable that the opening is opened at a side portion of the side portion erected with respect to the liquid surface of the arm portion, which is a side on which the liquid circulating in the liquid storage structure hits. The oil component is an oil film floating on the surface of the liquid stored in the liquid storage structure or an oil component floating in a ball shape on the surface of the liquid stored in the liquid storage structure. Furthermore, the guide member is, for example, a thin flat plate.

Thus, the oil floated on the liquid surface of the liquid stored in the liquid storage structure is provided on the side of the arm portion by rotating the shaft rod and swinging the arm portion left and right with the shaft rod as a base point. Since the oil is recovered from the opening into the space of the arm, oil can be removed from the liquid stored in the liquid storage structure. In addition, the height of the shaft rod erected on the liquid storage structure so that it can rotate is only required if the lower end of the opening of the arm portion extending from the shaft rod is lower than the liquid level of the liquid stored in the liquid storage structure. The height of the oil removing device does not need to be so high, and the shaft rod can be manually rotated, so that the structure of the oil removing device is not complicated. And since it only needs to attach a shaft rod to a liquid storage structure rotatably, an oil content removal apparatus can be attached to an existing liquid storage structure as it is. Furthermore, it becomes easy to guide oil floating on the liquid surface of the liquid stored in the liquid storage structure to the opening of the arm portion. In addition, since the guide member is arranged so as to extend obliquely outward from the end of the opening portion on the side of the shaft rod, the liquid having the oil component introduced into the space of the arm portion from the opening portion by being guided by the guide member It becomes easy to be guided to the shaft bar side. For this reason, even if an oil catching device is not provided in the space of the arm portion, the oil collected on the shaft rod side of the arm portion can be easily pumped with a pumping tool such as a scissors or a lever.

In the oil removing apparatus according to these inventions, the shaft rod is provided with a rotation mechanism for rotating the shaft rod at an upper end (claim 4). The rotation mechanism includes, for example, a first gear fixed to the upper end of the shaft rod, a second gear meshing with the gear orthogonal to the gear, and a handle that transmits rotation to the second gear.

As a result, the operator can simply swing the handle in the required direction, and the shaft can rotate in the specified direction or in the opposite direction via the rotation mechanism, allowing the arm to freely swing left and right. A power source for rotating the mechanism to displace the arm portion can be eliminated.

On the other hand, the oil removing device according to the present invention is for recovering and removing the oil floating on the liquid surface of the liquid stored in the liquid storage structure, and is rotatably installed on the liquid storage structure. A shaft rod and an arm portion extending in a radial direction from the shaft rod, wherein the arm portion has a space formed therein, and an opening communicating with the space at a side portion standing with respect to the liquid surface A lower end of the opening is lower than the liquid level of the liquid stored in the liquid storage structure, and an end opposite to the shaft bar is assembled to a rotating rod extending horizontally and linearly. The end of the arm portion may be displaced along the axial direction of the rotating rod by rotating the rotating rod (claim 3). The rotating rod is a screw rod, and a recess is provided at the end of the arm portion, and a screw groove that engages with the screw portion of the rotating rod is cut inside the recess.

As a result, the worker can swing the end part assembled to the rotating bar of the arm part, and thus the entire arm part, to the left and right freely only by turning the rotating bar in the required direction. It is possible to eliminate the need for a power source for the

An oil content removal method according to the present invention includes a shaft rod that is rotatably provided on a liquid storage structure, and an arm portion that extends in a radial direction from the shaft rod, and the arm portion has a space formed therein. An opening that communicates with the space is provided in a side portion that is erected with respect to the liquid surface, and a lower end of the opening removes an oil component lower than a liquid surface of the liquid stored in the liquid storage structure. An oil removing method using an apparatus, wherein the oil removing device is disposed at a corner of the liquid storage structure, and the arm is made variable by rotating the shaft rod, from the opening. The oil component floating on the liquid surface of the liquid stored in the liquid storage structure is collected in the space of the arm portion, and the oil component is removed from the liquid stored in the liquid storage structure (claim). Item 5).

The liquid storage structure is, for example, a coagulation sedimentation tank of a wastewater treatment device of a power plant, and the liquid stored in the liquid storage structure is, for example, wastewater discharged from the power plant. There may be one opening or a plurality of (for example, three) openings. It is preferable that the opening is opened at a side portion of the side portion erected with respect to the liquid surface of the arm portion, which is a side on which the liquid circulating in the liquid storage structure hits. The oil component is an oil film floating on the surface of the liquid stored in the liquid storage structure or an oil component floating in a ball shape on the surface of the liquid stored in the liquid storage structure.

In this way, by arranging the shaft rod of the oil removal device at the corner of the liquid storage structure, when the liquid storage structure is rectangular when viewed from above, the peripheral wall of the liquid storage structure and the oil removal are removed. Since a triangular shape with two sides on the arm part of the device is formed, the oil that floats on the liquid surface of the liquid stored in the liquid storage structure is collected near the shaft bar side of the arm part and is easy to collect Become.

As described above, according to the first to fifth aspects of the present invention, the liquid stored in the liquid storage structure can be obtained by rotating the shaft rod and swinging the arm portion left and right with the shaft rod as a base point. The oil that floats on the liquid surface can be collected in the arm space from the opening provided on the side of the arm, so it is possible to remove the oil from the liquid stored in the liquid storage structure. is there.

According to the first to fifth aspects of the present invention, the height of the shaft rod erected rotatably on the liquid storage structure is set such that the lower end of the opening of the arm portion extending from the shaft rod is the liquid storage Since it is only necessary to set the position to be lower than the liquid level of the liquid stored in the structure, it is not necessary to increase the overall height of the oil removal device, so that the oil removal device can be prevented from being enlarged. it can. Since the shaft rod can also be rotated manually, it is not always necessary to provide a power source, and the structure of the oil removing device can be prevented from becoming complicated. Accordingly, the manufacturing cost of the oil removing device of the present invention can be reduced.

Further, according to the first to fifth aspects of the present invention, the shaft rod may be attached to an appropriate position on the inner surface of the peripheral wall of the liquid storage structure, so that the oil removing device is attached to the liquid storage structure. The liquid structure can be attached without modification.

In particular, according to the first aspect of the present invention, the oil that has entered the space of the arm portion can be captured by the oil catching device. Therefore, after the oil catching device has sufficiently captured the oil, It is possible to dispose of the oil collected in the space of the arm part of the oil removing device to the outside simply by removing it from the arm part and discarding it.

In particular, according to the second aspect of the present invention, the oil floating on the liquid surface of the liquid stored in the liquid storage structure can be easily guided to the opening of the arm portion, so that the oil can be collected smoothly and quickly. Is possible. In particular, according to the second aspect of the present invention, since the guide member is arranged to extend obliquely outward from the shaft side end of the opening, the space from the opening to the arm is guided by the guide member. Since it is possible to easily guide the liquid having oil that has entered inside to the shaft rod side of the arm portion, the oil content collected on the shaft rod side of the arm portion is not required in the space of the arm portion. Can be easily pumped up with a pump such as a cocoon or eggplant.

In particular, according to the third aspect of the invention, the operator can freely swing the end portion assembled to the rotating rod of the arm portion, and thus the entire arm portion, to the left and right only by turning the rotating rod in the required direction. Accordingly, a power source for displacing the arm portion can be eliminated.

In particular, according to the invention described in claim 4, the operator simply turns the handle in a required direction, rotates the shaft rod in a predetermined direction or in the reverse direction via the rotation mechanism, and freely moves the arm portion to the left and right. Accordingly, it is possible to eliminate the need for a power source for rotating the rotation mechanism to displace the arm portion.

Further, according to the invention described in claim 5 , by disposing the shaft rod of the oil removing device at the corner of the liquid storage structure, when the liquid storage structure is rectangular when viewed from above, Since a triangular shape is formed with the peripheral wall of the liquid storage structure and the arm part of the oil removal device as two sides, the oil floating on the liquid surface of the liquid stored in the liquid storage structure is placed on the side of the shaft of the arm part. It is possible to collect and make it easy to collect in the space of the arm part from the opening provided on the shaft bar side of the arm part.

FIG. 1 is a schematic configuration diagram illustrating an example of a wastewater treatment apparatus of a thermal power plant. FIG. 2 is an explanatory view showing the configuration shown in the first embodiment of the oil removing device according to the present invention. FIG. 2 (a) is a side view of the oil removing device of the first embodiment, and FIG. 2 (b). These are the top views of the oil content removal apparatus of the said Example 1, FIG.2 (c) is the II sectional view taken on the line of Fig.2 (a). FIG. 3 is a cross-sectional view showing the internal configuration of the rotation mechanism of the oil removing device of the first embodiment, FIG. 3 (a) is a cross-sectional view in which the box of the rotation mechanism is divided, and FIG. It is sectional drawing which vertically divided the box of the rotation mechanism. FIG. 4 is an explanatory view showing a state in which the oil removing device of Example 1 is installed at a corner of the coagulation sedimentation tank and an apparatus for generating a water flow in the coagulation sedimentation tank. FIG. 5 is a plan view showing an aspect of a coagulation sedimentation tank in which the oil removing device of Example 1 is installed at a corner. FIG. 6 is an explanatory diagram showing a configuration of the oil removing device according to the second embodiment of the present invention and a process of installing the oil removing device of the second embodiment in the coagulating sedimentation tank. FIG. 7 is an explanatory view showing a state in which the tip portion of the arm portion is attached to the rotating rod while the oil removing device of Example 2 is installed at the corner of the coagulation sedimentation tank. FIG. 8 is a plan view showing an aspect of a coagulation sedimentation tank in which the oil removing device of Example 2 is installed at a corner.

  Embodiments of the present invention will be described below with reference to the drawings.

  In FIG. 1, an example of the waste water treatment apparatus 100 is shown. The wastewater treatment apparatus 100 is for treating steady wastewater and unsteady wastewater generated in a power generation facility such as a thermal power plant. The steady wastewater is relatively generated when a power plant is started or stopped, for example. It is clean wastewater, and unsteady wastewater is relatively dirty wastewater such as flush water generated during regular inspection of a boiler, for example.

  An outline of the flow of wastewater treatment by the wastewater treatment apparatus 100 shown in FIG. 1 will be described. After both steady wastewater and unsteady wastewater are sent to the wastewater tank 101 and temporarily stored in the wastewater tank 101, the wastewater is The pump 102 is sent to a common processing mechanism 103 including a pH adjustment tank 103a, a coagulation tank 103b, and a coagulation sedimentation tank 103c. Then, the waste water is fed to the aggregating tank 103b after adding caustic soda (NaOH), hydrochloric acid (HCL) or a flocculant in the pH adjusting tank 103a to raise the pH of the waste water to a predetermined value (for example, 10 or more). In the coagulation tank 103b, a coagulant assistant is charged and sent to the coagulation sedimentation tank 103c, where the waste water is divided into a precipitate and a supernatant water. In addition, water flow generators 121, 122, and 123 for agitating and mixing the drainage and the coagulant or coagulant aid are disposed in the pH adjustment tank 103a, the coagulation tank 103b, and the coagulation sedimentation tank 103c, respectively. ing. Each of the water flow generators 121, 122, 123 includes rotating bodies 121a, 122a, 123a composed of a plurality of blades, shaft rods 121b, 122b, 123b, and motors 121c, 122c, 123c. The blades of the rotating body 123a of the water flow generator 123 are for gently scraping the flocs (agglomerates) that have settled in the coagulation sedimentation tank 103c, the number of which is the other water flow generators. Since the purpose is different, it is usually two.

  The supernatant water and sediment of the wastewater are separated from the next of the coagulation sedimentation tank, and the supernatant water of the wastewater is sent from the relay tank 104 to the filter 106 by the pump 105 and further suspended by the filter 106. In the neutralization tank 107, caustic soda (NaOH) and hydrochloric acid (HCL) are newly added, stirred by the water flow generator 124, and discharged from the monitoring tank 108 to the outside by the discharge pump 109. The water flow generator 124 of the neutralization tank 107 also includes a rotating body 124a composed of a plurality of blades, a shaft rod 124b, and a motor 124c.

  On the other hand, the precipitate generated in the coagulation sedimentation tank of the waste water is concentrated in the concentration tank 110 and then sent to the dehydrator 112 by the pump 111 to be dehydrated into a cake and is temporarily stored in the cake hopper 113. While being carried, it is carried outside from the cake hopper 113 via a transport vehicle (not shown).

  2 to 5 show Example 1 of the oil content removal apparatus 1 installed in the coagulation sedimentation tank 103c. The oil removing apparatus 1 shown in the first embodiment includes a shaft rod 2, an arm portion 3, a rotating mechanism 4 that rotates the shaft rod 2, and a base portion 5 for installing the shaft rod 2 in the coagulation sedimentation tank 103c. And basically consists of. In this embodiment, the coagulation sedimentation tank 103c has a rectangular shape and opens upward, and the inner side surface of the side wall of the coagulation sedimentation tank 103c is erected vertically.

  As shown in FIG. 2 (c), the shaft rod 2 has a perfect circular cylindrical shape, and agglomerates so that a part or all of the shaft bar 2 stands from the water surface of the wastewater stored in the agglomeration sedimentation tank 103c. It is rotatably attached to the agglomeration sedimentation tank 103c through the base 5 described below in a form extending in the vertical direction (vertical direction) along the inner side surface of the side wall of the sedimentation tank 103c.

  As shown in FIGS. 2A, 2 </ b> C, and 4, the arm unit 3 basically includes an oil recovery unit 31 and a connecting unit 32. As shown in FIG. 2C, the connecting portion 32 is cylindrical and has a through hole 32 a having an inner diameter slightly larger than the outer diameter of the shaft rod 2. It is possible to do. And the connection part 32 is displaced along the longitudinal direction (the up-down direction or the vertical direction of the shaft bar 2) of the shaft bar 2, and can stop at arbitrary places. Thereby, the arm part 3 can move up and down as shown by the white arrow in FIG. 2 (a), and corresponds to the vertical change of the water level of the drainage stored in the coagulation sedimentation tank 103c. Is possible.

  As shown in FIGS. 2 (a), 2 (b), and 4, the oil recovery unit 31 is basically a long rectangular box that opens upward and has a space 31a inside. The connecting portion 32 is integrally connected at one end in the longitudinal direction. The upper opening of the oil collecting unit 31 may be detachably mounted with a lid (not shown), and may be closed by mounting the lid.

  As shown in FIGS. 2 (c) and 4, an opening 31 b communicating with the space 31 a is provided on the side of the oil collection unit 31 that is erected from the drainage water surface of the coagulation sedimentation tank 103 c. . The number of openings 31b may be one or more, and in this embodiment, there are three openings 31b. And the opening part 31b is set so that a lower end may become slightly lower than the water surface of the waste_water | drain of the coagulation sedimentation tank 103c by adjusting the position with respect to the shaft 2 of the connection part 32. FIG. Thereby, the oil component, especially the oil film, floating on the water surface of the drainage water of the coagulation sedimentation tank 103c can be taken into the space 31a of the oil component recovery unit 31 from the opening 31b.

  And in this Example 1, as FIG.2 and FIG.4 shows, the guide part 33 is provided in the opening edge by the side of the shaft rod 2 of each opening part 31b. The guide part 33 is a thin plate-shaped thing, and it is diagonally extended so that it may leave | separate for a while from the side part outer surface of the oil-component collection | recovery part 31 as it advances to the opposite side to the connection part 32 from the connection part 32 side. In the first embodiment, the guide portion 33 has a flat plate shape.

  Thus, by having the guide part 33, it becomes possible to make it easy to collect | recover the oil component which floats on the water surface of the waste_water | drain of the coagulation sedimentation tank 103c from the opening part 31b to the space 31a of the oil-component collection | recovery part 31, and oil collection | recovery Since the water flow including the oil component flowing into the space 31a of the portion 31 flows toward the shaft rod 2 side of the space 31a is formed, the oil component is collected on the shaft rod 2 side of the space 31a, The collected oil can be pumped up with a pumping tool such as an insulator and discharged to the outside.

  In addition, the opening 31b is a side part of the coagulation sedimentation tank 103c that is erected from the drainage water surface, for example, as shown by the arrow in FIG. In the case where the drainage of the coagulation sedimentation tank 103c also rotates clockwise, it is provided on the side part side where this water flow hits. As a result, the oil component floating on the water surface of the drainage from the opening 31b can easily enter the space 31a of the oil component recovery unit 31.

  Moreover, in this Example 1, as shown in FIG.2 (b) and FIG.2 (c), the oil capture device 34 which captures the oil content which entered the space 31a of the oil content collection part 31 is arrange | positioned in the space 31a. ing. In the first embodiment, the oil catching device 34 uses a thin plate-like oil adsorbing sheet, and this oil adsorbing sheet is on the side opposite to the side having the opening 31b of the oil collecting unit 31. It is latched by claw-shaped latching portions 35a, 35b provided on the inner side surface of the side portion. However, although not shown, the oil adsorbing sheet may be fixed to the inner side surface of the side portion of the oil recovery unit 31 with a fixing tool such as a screw. As the oil adsorbing sheet, a known oil adsorbing member, which is also called an oil sheet or an oil catcher, can be used.

  Thus, by arranging the oil catching device 34 in the space 31a of the oil collecting unit 31, the oil can be captured by the oil catching device 34 even if the worker does not perform the pumping work. By removing and discarding 34, oil can be removed. Then, by locking the oil adsorbing sheet that is the oil catching device 34 to the locking portions 35a and 35b, it is easy to remove the oil adsorbing sheet or attach a new oil adsorbing sheet, and smoothly replace the oil adsorbing sheet. Can be done.

  As shown in FIGS. 2A and 4, the base portion 5 has an inner diameter dimension in which the shaft rod 2 is rotatably inserted, and has, for example, a bottomed insertion hole 51 a. A substantially L-shaped abutment having two outer surfaces capable of abutting against both the orthogonal inner side surfaces with respect to a corner portion where the inner side surface of the side wall of the coagulating sedimentation tank 103c is orthogonal to the cylindrical portion 51 provided And a connecting portion 53 that connects the cylindrical portion 51 and the contact portion 52. As shown in FIG. 4 in particular, the contact portion 52 is formed with a through hole 54 penetrating from the inner surface to the outer surface of each of the two plate-like portions constituting the contact portion 52. Accordingly, the screw 55 is inserted from the inner surface toward the outer surface of the two plate-like through holes 54 constituting the contact portion 52 and screwed to the side wall of the coagulation sedimentation tank 103c. The part 5 is fixed to the corner of the side wall of the coagulation sedimentation tank 103c. And by inserting the one end side part of the longitudinal direction of the axial bar 2 in the insertion hole 51a of the cylinder part 51 of the base part 5, the axial bar 2 is installed in a state where it is rotatably erected with respect to the coagulation sedimentation tank 103c Become.

  As shown in FIGS. 2 (a), 2 (b) and 4, the rotating mechanism 4 is disposed on the upper end side of the shaft rod 2 inserted into the cylindrical portion 51 of the base portion 5. As shown in FIG. 3, the first embodiment basically includes two gears 41 and 42, a handle 43, and a box body 44 that houses at least the gears 41 and 42.

  The gears 41 and 42 are bevel gears in which teeth are engaged with each other, and the gear 41 is connected to the end of the shaft rod 2 in the longitudinal direction opposite to the base portion 5 in the box body 44. The end of the handle 43 on the base 43 a side is connected to the inside of the box 44. Bearings 45 and 46 are interposed between the shaft 2 and the box 44 and between the base 43a of the handle 43 and the box 44 so that the gear 41 and the gear 42 do not shift. The shaft 2 and the base 43a of the handle 43 are held.

  By setting it as such an oil content removal apparatus 1, the oil content removal apparatus 1 becomes a simple structure, and it prevents that the manufacturing cost becomes high. And the base part 5 is fixed to the corner | angular part of the side wall of the coagulation sedimentation tank 103c with the screw 55, and the shaft rod 2 provided with the arm part 3 and the rotation mechanism 4 is attached to the insertion hole 51a of the cylinder part 51 of the base part 5. For example, since the oil content removal apparatus 1 can be installed in the coagulation sedimentation tank 103c, the oil content removal apparatus 1 can be installed in the coagulation sedimentation tank 103c without modifying the existing coagulation sedimentation tank 103c.

  The oil recovery operation by the oil removing device 1 is also performed by holding the handle 43b of the handle 43 and rotating it clockwise as shown by the imaginary line from the solid line in FIG. 3 (a). On the contrary, by rotating counterclockwise, the arm portion 3 can be rotated clockwise or counterclockwise as viewed from above within a range of approximately 90 degrees as shown in FIG. .

  Therefore, as shown in FIG. 5, for example, the side opposite to the opening 31 b is on the side wall of the coagulation sedimentation tank 103 c with respect to the oil component such as an oil film rotating clockwise in the water surface of the coagulation sedimentation tank 103 c. By rotating the arm part 3 in the adjacent state clockwise to the other side of the side wall of the coagulation sedimentation tank 103c, the oil is guided to the opening 31b side by the guide part 33 and recovered from the opening 31b into the space 31a. After that, it is possible to recover and remove oil from the drainage by rotating the arm 3 counterclockwise and returning it to its original position. Can be made unnecessary.

  6 to 8 show a second embodiment of the oil removing device 1 according to the present invention. Hereinafter, description will be given based on the oil removing device 1. However, the same configurations as those of the first embodiment are basically denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted.

  The oil removing device 1 is for displacing the arm portion 3 without having the rotating mechanism 4, and an example thereof is shown in FIGS. 6 and 7. Of these, the shaft 2 is the embodiment. 2, one end in the longitudinal direction of the oil recovery unit 31 of the arm unit 3 is integrally connected.

  In the second embodiment, the oil recovery unit 31 includes a proximal end portion 36 on the shaft rod 2 side and a distal end portion 37 on the opposite side of the shaft rod 2, and the proximal end portion 36 and the distal end side are provided. The portion 37 is connected via a flexible portion 38 that can freely expand and contract and bend in the left-right direction. The proximal end portion 36 and the distal end portion 37 have a space (not shown) that opens upward and communicates with the opening 31b as in the first embodiment, and the opening above this space is detachable. The lids 36a and 37a are closed. Furthermore, the distal end side portion 37 has an arc-shaped recess 39 at the end in the longitudinal direction, and the inner surface of the recess 39 is threaded.

  The pedestal 5 has two substantially flat contact pieces having outer surfaces that can abut against either one of the two inner surfaces orthogonal to the corner portion where the inner surfaces of the side walls of the coagulation sedimentation tank 103c are orthogonal to each other. Contact portions 52 a and 52 b are provided, and these contact portions 52 a and 52 b are connected to the outer surface of the cylindrical portion 51.

  And in this Example 2, as shown in FIG. 8, the rotating rod 6 is constructed diagonally with respect to the coagulation sedimentation tank 103c. The rotating rod 6 is formed with a screw thread that can be engaged with a screw groove of the recess 39 of the distal end portion 37 of the arm portion 3, and a portion in the vicinity of one end in the longitudinal direction is an opening edge of the coagulation sedimentation tank 103c. It is rotatably mounted on the fixed pedestal 7a, and the portion in the vicinity of the other end in the longitudinal direction is rotatably mounted on the pedestal 7b fixed to the opening edge of the coagulation sedimentation tank 103c so that the rotating rod 6 is not displaced. It has become. Further, a handle 6a is provided on one end side (the pedestal 7b side in the second embodiment) of the rotating rod 6, and the rotating rod 6 is rotated in the same direction by rotating the handle 6a clockwise or counterclockwise. It is designed to rotate.

  Also by using such an oil content removal apparatus 1, the oil content removal apparatus 1 becomes a simple structure, and it is prevented that the manufacturing cost becomes high. And the base part 5 is fixed to the corner | angular part of the side wall of the coagulation sedimentation tank 103c with the screw 55, and the axis | shaft rod 2 provided with the arm part 3 and the rotation mechanism 4 is attached to the insertion hole 51a of the cylinder part 51 of the base part 5. Since the pedestals 7a and 7b are fixed to the periphery of the opening of the coagulation sedimentation tank 103c and the rotating rod 6 is attached thereto, the oil removing device 1 can be installed in the coagulation sedimentation tank 103c. The oil removing device 1 can be installed in the coagulation sedimentation tank 103c without much modification of the 103c.

  Then, the oil collecting operation by the oil removing device 1 is also performed after mounting the recess 39 of the tip side portion 37 of the arm portion 3 to the rotating rod 6 so that the screw groove of the recess 39 and the screw thread of the rotating rod 6 are engaged with each other. By holding the handle 6a and rotating it clockwise or counterclockwise, the rotating rod 6 also rotates in the same direction. As a result, as shown in FIG. The distal end side portion 37 is displaced along the axial direction of the rotary rod 6 toward the pedestal 7a side or the pedestal 7b side, and the proximal end side portion 36 of the oil recovery unit 31 is pulled by the distal end side portion 37. At this time, the flexible portion 38 is Since it expands and contracts appropriately and bends in a predetermined direction, it can be rotated clockwise or counterclockwise as viewed from above within a range of approximately 90 degrees around the shaft 2 as shown in FIG.

  Therefore, as shown in FIG. 8, even in Example 2, the side opposite to the opening 31b is coagulated and precipitated, for example, with respect to the oil component such as an oil film rotating clockwise in the water surface of the coagulation sedimentation tank 103c. By rotating the arm portion 3 adjacent to the side wall of the tank 103c clockwise to the other side of the side wall of the coagulation sedimentation tank 103c, the oil is guided to the opening portion 31b side by the guide portion 33, and the space from the opening portion 31b. After collecting in 31a, it is possible to collect and remove oil from the drainage by rotating the arm 3 counterclockwise and returning it to its original position. Work can also eliminate the need for advanced technology.

DESCRIPTION OF SYMBOLS 1 Oil content removal apparatus 2 Shaft rod 3 Arm part 31 Oil content collection part 31a Space 31b Opening part 33 Guide part 34 Oil capture device 36 Base end side part 37 Front end side part 38 Flexible part 39 Indentation 4 Rotation mechanism 41 Gear 42 Gear 43 Handle 44 Box body 5 Base portion 51 Tube portion 51a Insertion hole 52 Contact portion 52a Contact portion 52b Contact portion 53 Connection portion 54 Through hole 55 Screw 6 Rotating rod 100 Waste water treatment device 103c Coagulation sedimentation tank 123 Water flow generation device

Claims (5)

This is for recovering and removing the oil floating on the liquid surface of the liquid stored in the liquid storage structure, and a shaft rod which is erected on the liquid storage structure so as to be rotatable, and extends from the shaft rod in the radial direction. With arm part,
The arm portion is
A space is formed inside, and an opening communicating with the space is provided in a side portion standing on the liquid surface, and a lower end of the opening is a liquid liquid stored in the liquid storage structure. lower than the surface rather than,
An oil removing device , wherein an oil catching device for catching oil entering the space from the opening is disposed in the space . This is for recovering and removing the oil floating on the liquid surface of the liquid stored in the liquid storage structure, and a shaft rod which is erected on the liquid storage structure so as to be rotatable, and extends from the shaft rod in the radial direction. With arm part,
The arm portion is
A space is formed inside, and an opening communicating with the space is provided in a side portion standing on the liquid surface, and a lower end of the opening is a liquid liquid stored in the liquid storage structure. Below the surface ,
A guide member for guiding oil to the opening is provided at the shaft rod side end of the opening, and the guide member is inclined in a direction gradually separating from the opening toward the side opposite to the shaft rod. An oil removing device characterized by extending . This is for recovering and removing the oil floating on the liquid surface of the liquid stored in the liquid storage structure, and a shaft rod which is erected on the liquid storage structure so as to be rotatable, and extends from the shaft rod in the radial direction. With arm part,
The arm portion is
A space is formed inside, and an opening communicating with the space is provided in a side portion standing on the liquid surface, and a lower end of the opening is a liquid liquid stored in the liquid storage structure. Below the surface ,
The end of the arm portion is displaced along the axial direction of the rotating rod by rotating the rotating rod with the end opposite to the shaft rod assembled to a rotating rod extending horizontally and linearly. An oil removing device characterized by that. The oil removing device according to claim 1 or 2 , wherein the shaft rod is provided with a rotation mechanism for rotating the shaft rod at an upper end. A shaft rod rotatably provided on the liquid storage structure, and an arm portion extending in a radial direction from the shaft rod, the arm portion having a space formed therein, An opening communicating with the space is provided on a standing side, and the lower end of the opening is an oil removing method using an oil removing device lower than the liquid level of the liquid stored in the liquid storage structure. And
The oil removing device is arranged at a corner of the liquid storage structure, and the shaft is rotated to change the arm part, so that the liquid stored in the liquid storage structure from the opening can be changed. An oil content removing method, wherein oil content floating on a liquid surface is collected in a space portion of the arm portion, and the oil content is removed from the liquid stored in the liquid storage structure.

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