JP2018020268A - Active carbon backflow preventing device, active carbon tower and operation method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an active carbon tower capable of preventing drainage of active carbon when oil is drained from a tower apex part of the active carbon tower and capable of dissolving obstruction of flow passage generated by oil drainage.SOLUTION: A device has an influent pipe (16) arranged with projecting at a shoulder part close to an apex (11) of a tank (10), a connecting pipe (13) projecting arranged with a tubular member opening at the apex (11) of the tank (10) and communicated with a tank inside (12), an outflow pipe (40) projecting arranged close to a bottom part (15) of the tank (10), and a first filter part (60) and a second filter part (70) arranged in the apex (11) and the bottom part (15) of the tank (10) respectively and interposed in a flow passage, an oil content (31) floated and retained in the tank (10) can be discharged from the connecting pipe (13) with a pressure (P) of an inside (12), an active carbon (20) clogged in the first filter part (60) is detached from a cleaning fluid (8) press-fit to the inside (12) for passing the connecting pipe (13).SELECTED DRAWING: Figure 1

Description

  The present invention relates to an activated carbon tower for removing impurities by adsorbing impurities to activated carbon filled therein while flowing a fluid to be treated from a top to a bottom in a cylindrical and vertical tank. Furthermore, the present invention relates to an activated carbon backflow prevention device that can eliminate the problems that occur when oil components that float and stay in the vicinity of the top of the activated carbon tower are drained from the top of the activated carbon tower.

  2. Description of the Related Art An activated carbon tower is known that performs purification treatment by adsorbing and removing impurities from activated carbon while separating a turbid fluid to be treated by specific gravity. This activated carbon tower is configured to include a cylindrical and vertically placed tank, activated carbon filled in the tank, and a pump for allowing the fluid to be treated to flow into the tank from the top of the tank.

  The activated carbon tower is used to circulate turbid liquids having different specific gravities in a tank with a pump and to adsorb and remove impurities on the activated carbon while separating the liquid substances by specific gravity. For example, the continuous operation is performed so that the aqueous solution in which the oil component mixed in the aqueous solution as an impurity component is adsorbed and removed by activated carbon is discharged from the bottom of the column. However, if it is continuously operated, oil having a low specific gravity floats and stays at the top of the tank, and the processing efficiency also decreases due to the blockage of the activated carbon that clogs the bottleneck.

  Therefore, in order to maintain the processing efficiency, the activated carbon tower needs to be cleaned in order to periodically stop the continuous operation, remove the oil that stays floating, and eliminate clogging and the like. Therefore, there is a method for operating the activated carbon tower in which the fluid strongly flows backward in the opposite direction to the normal operation in the top channel of the tank. First, during normal operation, the normal direction of flow in the top channel of the tank is the direction that flows from top to bottom into the tank. On the other hand, during maintenance, draining (hereinafter also referred to as “oil draining”) that forces the fluid to flow backward from the bottom upward, that is, from the inside to the outside of the tank, is effective. It is.

  Here, when oil is drained by reverse injection, since the liquid flow direction is that during normal operation, activated carbon flows out from the tank in the outward direction. Many activated carbons that have not yet reached the limit life. When these useful activated carbons flow out, there is a problem that even if they can be recovered and reused, waste associated with cleaning work occurs.

  As described above, the waste in the case of flowing out to useful activated carbon will be described in more detail. In the liquid treatment facility including the activated carbon tower, the activated carbon is contaminated by the oil to be separated from the aqueous turbid liquid and the treatment capacity is deteriorated. In order to reduce the decrease in operating efficiency due to this, the aqueous solution containing the oil component is supplied with the aqueous solution that has been previously cleaned by removing the undissolved oil component to the activated carbon tower. That is, the processing load of the next process is reduced by flowing the aqueous solution after the cleaning treatment into the activated carbon tower.

  However, even in the aqueous solution after the above-described cleaning treatment, the oil component is not completely removed. For this reason, the remaining undissolved oil is suspended and retained at the top of the tank in the activated carbon tower, causing clogging and the like. In order to remove the accumulated oil component, an operation is performed in which the oil component is back-injected and blown outward from the oil component collecting pipe projecting above the tank using the pressure in the tank. However, the reverse injection causes the activated carbon in the tank to flow out. This is not only the loss of activated carbon, but also when collecting only the oil from the spilled activated oil and returning it to the system, the remaining activated carbon that cannot be removed from the recovered oil will act as impurities in the recovered oil. This will degrade the performance for the original oil application.

JP 2006-159039 A

  As described above, at present, no effective measures have been taken with respect to waste when the activated carbon is discharged to the useful activated carbon along with the cleaning operation of the activated carbon tower. For example, in Patent Document 1, as a mechanism for preventing outflow of activated carbon riding on the flow of the liquid to be adsorbed, there is a mechanism in which the top of the activated carbon packed bed is “covered” with a large granular material instead of a filter. However, when oil is removed from the top of the activated carbon tower by reverse injection, it is not possible to prevent the activated carbon from flowing out to the useful activated carbon, which is not appropriate as a solution to the above problem.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to prevent activated carbon from flowing out when oil is drained from the top of the activated carbon tower, and is caused by draining oil. An object of the present invention is to provide an activated carbon backflow prevention device, an activated carbon tower, and an operation method thereof that can also eliminate blockage of a flow path.

The present inventors have found that the problem can be solved by providing an activated carbon backflow prevention device in which a plurality of members are combined at the top of the activated carbon tower, and have completed the present invention.
In the activated carbon backflow prevention device according to one aspect of the present invention, the treated fluid (30) flows from the top (11) of the tank (10) filled with activated carbon (20) into the interior (12), and the treated fluid ( 30) an activated carbon backflow prevention device (99) attached to the activated carbon tower (100) for adsorbing and removing impurities contained in 30),
One end (65) of the tank (10) is closely connected to a connecting pipe (13) projecting from a tubular member having an inner diameter (D) smaller than the inner diameter of the tank (T) at the top (11) of the tank (10). A collecting tube (90) communicating with the tank interior (12);
An oil recovery pipe (14) connected to the other end (66) of the liquid collecting cylinder (90) and communicating from the inside of the tank (12) to the outside via the liquid collecting cylinder (90);
A cleaning fluid press-fitting pipe (64) extending from the peripheral wall (67) of the liquid collecting tube (90) and extending to the liquid collecting tube (90) with a cleaning fluid press-fitting means (81).
A first filter portion (60) disposed on the top (11) of the tank (10) and interposed in the flow path,
The first filter portion (60) has an inner diameter (D) of the liquid collecting cylinder (90) that is tightly sandwiched between the one end (65) of the liquid collecting cylinder (90) and the connecting pipe (13). A first partition plate (69) having a larger outer diameter (C);
One or more through holes (61-63) are formed in the first partition plate (69),
A liquid collection strainer (1) is detachably attached to each of the through holes (61 to 63),
The oil (31) suspended and retained in the tank (10) can be discharged from the oil recovery pipe (14) with the pressure (P) inside the tank (12),
By pressing the cleaning fluid (8) from the cleaning fluid press-fitting means (81) into the liquid collecting cylinder (90) through the cleaning fluid press-fitting pipe (64), the first filter part (60) The activated carbon (20) attached to the lower side of the liquid collection strainer (1) is blown down into the tank interior (12).

The activated carbon tower which concerns on 1 aspect of this invention flows in the to-be-processed fluid (30) into the inside (12) from the top part (11) of the tank (10) with which the activated carbon (20) was filled, This to-be-processed fluid (30) An activated carbon tower (100) for adsorbing and removing impurities contained in
A tubular member having an inner diameter (J) smaller than the inner diameter (T) of the tank (10) is opened at the shoulder near the top (11) of the tank (10), and an inflow pipe (16) communicating with the tank interior (12); ,
A connecting pipe (13) that projects from the top (11) of the tank (10) by opening a tubular member having an inner diameter (D) smaller than the inner diameter (T) of the tank and communicating with the inside of the tank (12);
An outflow pipe (40) projecting from a tubular member having an inner diameter (K) smaller than the inner diameter (T) of the tank (10) and projecting from the tank interior (12) in the vicinity of the bottom (15) of the tank (10);
A first filter portion (60) and a second filter portion (70) disposed on the top (11) and the bottom (15) of the tank (10) and interposed in the flow path,
Oil (31) suspended and retained in the tank (10) can be discharged from the connecting pipe (13) with the pressure (P) in the interior (12),
The activated carbon (20) clogged in the first filter part (60) can be removed by a cleaning fluid (8) press-fitted into the interior (12) so as to pass through the connecting pipe (13).

Further, in the activated carbon tower according to one aspect of the present invention, one end (65) having a space (G) having a predetermined height (L) with an inner diameter (D) coinciding with the opening of the connecting pipe (13) is liquid-tight. A collecting tube (90) that is detachable so as to communicate with the
An oil recovery pipe (14) connected to the other end (66) of the liquid collecting cylinder (90) and communicating from the tank interior (12) via the liquid collecting cylinder (90);
The tank (10) forms a peripheral wall (9) by a cylinder having a vertical central axis (Z),
The peripheral wall (9), the first filter part (60), and the second filter part (70) surround the activated carbon (20) to restrict movement,
The first filter part (60) is liquid-tightly sandwiched between the one end (65) of the liquid collecting cylinder (90) and the connection pipe (13), and has an inner diameter (D) of the liquid collecting cylinder (90). ) Having a first partition plate (69) with a larger outer diameter (C),
The second filter part (70) has a second partition plate (79) disposed in the vicinity of the bottom (15) of the tank (10) so that the upper and lower sides can be separated from each other over the entire surface of the tank inner diameter (T).
One or more through holes (61-63, 71-75) are formed in the first partition plate (69) and the second partition plate (79), respectively.
A collection strainer (1) is detachably attached to each of the through holes (61 to 63, 71 to 75),
A cleaning fluid press-fitting pipe (64) extending at a right angle to the central axis (Z) and communicating with the peripheral wall (67) of the liquid collecting cylinder (90) extends.
A configuration in which the cleaning fluid (8) can be press-fitted by the cleaning fluid press-in means (81) from the open end (68) of the cleaning fluid press-fit pipe (64) toward the inside of the liquid collecting cylinder (90). preferable.

Further, in the activated carbon tower according to one aspect of the present invention, the liquid collection strainer (1) is made of polyvinylidene fluoride (PVDF) or polyvinyl chloride (PVC),
A hollow head (2) formed with a slit (6) having an opening that can block the passage of the activated carbon (20);
A tubular neck (3) with an internal space extending in communication with the head (2);
A tail (5) formed so that the inner space communicates from the neck (3) to the opening of the terminal (4) in a tubular shape;
A nut (7) formed with a female screw that can be screwed with a male screw formed on the neck (3),
Fit through the through holes (61-63, 71-75) up to the neck (3), screw the neck (3) with the nut (7),
It is preferable that they can be appropriately exchanged.

Moreover, the activated carbon tower which concerns on 1 aspect of this invention WHEREIN: The attachment form of the said liquid strainer (1) in the said 1st filter part (60) is the said head on the lower surface side of the said horizontal 1st partition plate (69). Part (2) is arranged,
The collection form of the liquid collection strainer (1) in the second filter part (70) is a form in which the head (2) is disposed on the upper surface side of the horizontal second partition plate (79). preferable.

Further, in the activated carbon tower according to one aspect of the present invention, a predetermined range of 35% to 65% with respect to the height (L) in the space (G) of the liquid collecting cylinder (90) is set to a middle height (H). Set,
The collection strainer (1) communicates the opening (4) of the tail (5) with the space (G) at the mid-height (H),
It is preferable that the cleaning fluid press-fitting pipe (64) branches from the peripheral wall (67) of the liquid collecting cylinder (90) at the middle height (H) and communicates with the space (G).

The activated carbon tower operating method according to one embodiment of the present invention is configured to distribute a fluid to be treated (30) that is turbid with substances having different specific gravities to a tank (10) and to separate the fluid to be treated (30) according to specific gravity. The operation method of the activated carbon tower (100) in which the normal operation of adsorbing and removing impurities on the activated carbon (20) and removing the oil component and cleaning alternately is performed,
A normal operation continuation step (S10) for continuing the normal operation;
By closing or restricting the outflow control valve (41), the fluid to be treated (30) is protruded from the outflow pipe (40) that projects from the bottom (15) of the tank (10) and communicates from the inside of the tank (12). An outflow limiting step (S20) for stopping or limiting the outflow of
The oil component (31) suspended and retained at the top of the tank (10) is recovered by causing the pressure (P) in the tank to flow backward to the oil recovery pipe (14) protruding above the tank (10). A recovery step (S30);
One end (65) having a space (G) of a predetermined height (L) with an inner diameter (D) coinciding with the opening of the connecting pipe (13) communicating with the inside of the tank is detachable so as to communicate in a liquid-tight manner. From the cleaning fluid press-fit pipe (64) implanted in the peripheral wall (67) of the liquid collecting tube (90) and communicating in a liquid-tight manner, the cleaning fluid (8) is supplied to the liquid collecting tube (90) by the cleaning fluid press-fitting means (81). And a strainer clogging removal step (S50) for removing clogging of the liquid collection strainer (1) disposed in the first partition plate (69) of the liquid collection cylinder (90).

  In the operation method of the activated carbon tower according to one aspect of the present invention, the oil component (31) recovered from the oil component recovery pipe (14) by the oil recovery step (S30) is returned to its original use and reused. It is preferable to have a reuse process (S40).

  According to the present invention, when draining oil from the top of the activated carbon tower, the activated carbon backflow prevention device, activated carbon tower, and operation thereof can prevent the outflow of activated carbon and also eliminate the blockage of the flow path caused by draining oil. A method can be provided.

It is a longitudinal cross-sectional view which sees through from the front the activated carbon tower which concerns on one Embodiment of this invention (henceforth "this activated carbon tower"). FIG. 2 is a view showing an activated carbon backflow prevention device (hereinafter, also referred to as “this device”) according to an embodiment of the present invention, and FIG. 2A is an enlarged longitudinal sectional view of the device enlarged and seen through from the front. 2 (B) is a plan view of the first partition plate. It is a figure explaining each operation | movement of an oil-component collection | recovery process and a strainer clogging removal process using the enlarged longitudinal cross-sectional view of FIG. 2 (A). It is a front view which shows the external appearance of the liquid collection strainer used with this apparatus. It is a flowchart explaining the procedure of the operating method of this activated carbon tower.

  Hereinafter, preferred embodiments of the present invention will be described in detail. The present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily.

  FIG. 1 is a longitudinal sectional view of the activated carbon tower seen through from the front. As shown in FIG. 1, the activated carbon tower 100 includes a vertical cylindrical tank 10, activated carbon 20 that fills the tank 10, and a pump 80 that allows a fluid 30 to flow into the interior 12 from the top 11 of the tank 10. And is configured. The activated carbon tower 100 continues normal operation so that the activated carbon 20 of the tank 10 adsorbs and removes impurities contained in the fluid 30 to be treated.

  As will be described in detail later, the tank 10 is exemplified by a cylindrical shape in which the peripheral wall 9 is formed by a cylinder having a vertical central axis Z, but is not limited to such a cylindrical shape. . That is, the tank 10 may have a streamlined shape, a spindle shape, or a shape close to a spherical shape, but it is preferable that the tank 10 be installed in a vertically long shape instead of a horizontally long shape.

  The tank 10 of the activated carbon tower 100 includes an inflow pipe 16, a connection pipe 13, an outflow pipe 40, and a first filter part 60 and a second filter part 70. The inflow pipe 16 protrudes from the shoulder near the top 11 of the tank 10 with a tubular member having an inner diameter J smaller than the tank inner diameter T and communicates with the tank interior 12. The connecting pipe 13 protrudes from the top portion 11 of the tank 10 with a tubular member having an inner diameter D smaller than the tank inner diameter T, and communicates with the tank interior 12.

  The oil component 31 suspended and retained in the tank 10 can be discharged through the connecting pipe 13 with the pressure P in the interior 12. The outflow pipe 40 projects from the tank interior 12 with a tubular member having an inner diameter K smaller than the tank inner diameter T opened in the vicinity of the bottom 15 of the tank 10. The first filter unit 60 and the second filter unit 70 are respectively disposed on the top 11 and the bottom 15 of the tank 10 and interposed in the flow path.

  In addition, the activated carbon tower 100 includes a connection pipe 13 that can distinguish and discharge the fluid 30 to be processed by specific gravity, an outflow pipe 40, and a first filter section 60 and a second filter section at the upper bottom of the tank 10, respectively. 70 are arranged one by one. Further, the activated carbon 20 filled in the tank 10 is configured to be surrounded by the peripheral wall 9, the first filter part 60, and the second filter part 70. Therefore, the activated carbon 20 is surrounded by the peripheral wall 9, the first filter part 60, and the second filter part 70 so as not to move.

  FIG. 2 is a view showing the apparatus, FIG. 2 (A) is an enlarged vertical sectional view of the apparatus enlarged and seen through from the front, and FIG. 2 (B) is a plan view of the first partition plate. As shown in FIG. 2 (A), the liquid collecting cylinder 90 is in fluid-tight communication with one end 65 having an inner diameter D that coincides with the opening of the connecting pipe 13 and a space G having a predetermined height L. Further, as will be described later, the liquid collecting cylinder 90 can be separated and removed from the connecting pipe 13 at one end 65 thereof.

<Relationship between this device and this activated carbon tower>
The apparatus 99 is mainly composed of a liquid collection cylinder 90 and includes an oil content collection pipe 14, a cleaning fluid press-fitting pipe 64, a first partition plate 69 and a liquid collection strainer 1 associated therewith. However, an article excluding the oil recovery pipe 14 from this configuration may be defined as an activated carbon backflow prevention device. The activated carbon tower 100 is configured by attaching the apparatus 99, a pump 80, and a pump (cleaning fluid press-fitting means) 81 to the tank 10. In this activated carbon tower 100, the fluid 30 to be treated flows into the interior 12 from the top 11 of the tank 10 filled with the activated carbon 20, and the impurities contained in the fluid 30 to be treated are adsorbed and removed. The apparatus 99 is attached to the top portion 11 of the activated carbon tower 100 to prevent the activated carbon 20 from flowing out from the activated carbon tower 100 when oil is drained from the top portion 11.

<This device>
The configuration and operation of the apparatus 99 will be briefly described. As described above, the present device 99 referred to here is attached to the activated carbon tower 100, and includes a liquid collection cylinder 90, an oil content collection pipe 14, a cleaning fluid press-fit pipe 64, a first partition plate 69, and a collection pipe. The liquid strainer 1 is provided. The liquid collection tube 90 communicates with the tank interior 12 by tightly connecting one end 65 to a connecting pipe 13 projecting from a tubular member having an inner diameter D smaller than the tank inner diameter T at the top 11 of the tank 10. The liquid collection tube 90 is formed by connecting the oil collecting pipe 14 connected to the upper side and the connecting pipe 13 connected to the lower side to the flanges 22, 94, 92, 17 having bolt holes 19, 95, 93, 18 respectively. The first partition plate 69 is also sandwiched below and is fastened by the bolt 21 so that it can be assembled and removed.

  A tank side flange 17 is formed on the upper portion of the connecting pipe 13. The tank side flange 17 has twelve bolt holes 18 formed at equal intervals on a circle centered on the central axis Z. The 1st partition plate 69 is formed in the disk shape which can closely_contact | adhere to the tank side flange 17 by an edge part. At the edge, bolt holes 89 are formed at equal intervals at positions corresponding to the twelve bolt holes 18 of the tank side flange 17. Similarly, the lower flange 92 of the liquid collection cylinder 90 is also formed so as to be in close contact with the tank side flange 17 with the first partition plate 69 interposed therebetween, and twelve bolt holes 93 are also formed.

  As shown in FIG. 2 (A), the first partition plate 69 is placed between the lower flange 92 of the liquid collecting cylinder 90 and the tank side flange 17 so as to be close to the bolt holes 93, 89, 18. The bolt 21 passes through and is screwed by the nut 23 from the lower side of the tank side flange 17. Note that the upper surface of the first partition plate 69 is attached in advance to the bottom surface of the lower flange 92 with an adhesive. As will be described later, the liquid collection strainer 1 is attached to the first partition plate 69 to constitute a first filter unit 60.

  Further, an upper flange 94 is formed vertically symmetrically with the lower flange 92 above the liquid collection tube 90. Further, a lid side flange 22 is also formed on the oil recovery pipe 14. The lid side flange 22 is combined in close contact with the upper side flange 94 of the liquid collecting cylinder 90. As described above, the bolt holes 19 of the lid side flange 22 formed in the oil collecting pipe 14 are formed in an array that matches the bolt holes 95 of the upper flange 94 formed above the liquid collecting cylinder 90. Yes.

  As shown in FIG. 2 (A), the upper flange 94 of the liquid collecting cylinder 90 is combined with the lid side flange 22 of the oil recovery pipe 14 in close contact, and the bolt 21 penetrates through the bolt holes 19 and 95 from above. It is screwed by a nut 23 from the lower side of 94.

  The oil recovery pipe 14 is connected to the other end 66 of the liquid collecting cylinder 90 and communicates from the tank interior 12 to the outside via the liquid collecting cylinder 90. The cleaning fluid press-in pipe 64 is a pipe that branches off from the peripheral wall 67 of the liquid collection tube 90 and communicates the cleaning fluid press-in means 81 with the liquid collection tube 90.

  The first filter unit 60 is disposed on the top 11 of the tank 10 and is interposed in the flow path. The first filter unit 60 includes a first partition plate 69 having an outer diameter C larger than the inner diameter D of the liquid collecting cylinder 90 that is tightly sandwiched between the one end 65 of the liquid collecting cylinder 90 and the connecting pipe 13. Yes. The first partition plate 69 has one or more through holes 61 to 63, and the liquid collection strainer 1 is detachably attached to each of the through holes 61 to 63.

  The oil component 31 suspended and retained in the tank 10 can be discharged from the oil component recovery pipe 14 so as to be back-injected with the pressure P inside the tank 12. With this reverse injection, the activated carbon 20 in the tank interior 12 rises and adheres to the lower side of the liquid collection strainer 1 of the first filter unit 60. Therefore, the activated carbon 20 adhering to the lower side of the liquid collection strainer 1 is transferred to the tank interior 12 by press-fitting the cleaning fluid 8 from the cleaning fluid press-fitting means 81 into the liquid collection cylinder 90 through the cleaning fluid injection pipe 64. Blown off.

<Activated carbon tower>
Hereinafter, the detailed configuration of the activated carbon tower 100 will be described. The first filter section 60 includes a first partition plate 69 having an outer diameter C larger than the inner diameter D of the liquid collection cylinder 90 that is liquid-tightly sandwiched between the one end 65 of the liquid collection cylinder 90 and the connecting pipe 13. . The second filter unit 70 includes a second partition plate 79 disposed in the vicinity of the bottom 15 of the tank 10 so as to be vertically separable over the entire surface of the tank inner diameter T. The first partition plate 69 and the second partition plate 79 have one or more through holes 61 to 63 and 71 to 75, respectively. The liquid collection strainer 1 is detachably attached to each of the through holes 61 to 63 and 71 to 75.

  As will be described later with reference to FIG. 4, the liquid collection strainer 1 has a shape having a neck portion 3 and a tail portion 5 extending from a head portion 2 forming a filter body. The mounting form of the liquid collection strainer 1 is similar between the first filter unit 60 and the second filter unit 70, but the vertical direction is reversed. The liquid strainer 1 is attached to the first filter unit 60 so that the head 2 appears on the lower surface side of the horizontal first partition plate 69.

  On the contrary, the collection form of the liquid collection strainer 1 in the second filter unit 70 is arranged such that the head 2 appears on the upper surface side of the horizontal second partition plate 79. With this configuration, the activated carbon 20 filled in the tank 10 faces the head 2 of the liquid collection strainer 1 attached to each of the first filter unit 60 and the second filter unit 70. As described above, the activated carbon 20 faces the head 2 of the liquid collection strainer 1 constituting the filter body from the outside, and does not enter the inside of the head 2 beyond the slit 6 that is the filter body. That is, it cannot cross the liquid collection strainer 1 and is surrounded by the peripheral wall 9 and cannot move outside these ranges.

  The oil recovery pipe 14 is connected to the other end 66 of the liquid collection cylinder 90 and communicates with the tank interior 12 via the liquid collection cylinder 90. Although omitted in FIGS. 1 to 3, in the activated carbon tower 100 in actual operation, a dedicated pipe is connected to the oil recovery pipe 14, the inflow pipe 16, the outflow pipe 40, and the cleaning fluid press-fit pipe 64. Yes. The activated carbon tower 100 is incorporated in a higher-order system, and exchanges fluid via a pipe (not shown) so as to exhibit a function required for the system.

  The cleaning fluid press-fitting pipe 64 is branched by the peripheral wall 67 of the liquid collecting cylinder 90 and extends in communication with the space G. The cleaning fluid press-fitting pipe 64 is branched in a direction perpendicular to the vertical central axis Z at the center of the liquid collecting cylinder 90. The cleaning fluid press-fitting pipe 64 is configured to press-fit the cleaning fluid 8 by the cleaning fluid press-fitting means 81 from the open end 68 toward the inside of the liquid collecting cylinder 90. It is preferable to air blow the liquid collection strainer 1 to be cleaned using air as the cleaning fluid 8. However, air is only an example, and other more appropriate gas or liquid may be used.

<Medium height H>
Further, the position at which the cleaning fluid press-fitting pipe 64 is disposed on the side surface of the liquid collecting cylinder 90 is not particularly limited, but is clearly shown in FIG. 2 and disposed at a position of the middle height H defined in the following predetermined range. It is preferred that That is, for the height L of the space G formed by the liquid collecting cylinder 90, a predetermined range 35% to 65% of the height L is defined as the middle height H. That is, height L × 35% = height H1, and height L × 65% = height H2. Here, the cleaning fluid press-fitting pipe 64 is provided so as to branch from the peripheral wall 67 of the liquid collecting cylinder 90 at a middle height H and communicate with the space G. Further, the mounting height of the liquid collection strainer 1 is defined so that the opening 4 of the tail part 5 of the liquid collection strainer 1 is aligned with the height H of the middle stomach. According to such a configuration, the flow of the cleaning fluid 8 at the time of cleaning the liquid collection strainer 1 by air blow or the like does not go around and can be cleaned smoothly (see FIG. 3) efficiently. The middle height H need not be strict.

  As shown in FIG. 2 (B), the first partition plate 69 has through holes 61 to 63 for attaching the liquid collection strainer 1 with a substantially uniform separation distance within the range of the inner diameter D of the liquid collection cylinder 90. There are three holes. Further, outside the range of the inner diameter D of the liquid collecting cylinder 90, twelve bolt holes are formed at equal intervals so as to be detachably fixed to the flange portion of the liquid collecting cylinder 90 with bolts and nuts. Since the liquid collection strainer 1 is a consumable item, it needs to be replaced according to its service life. When replacing the liquid collection strainer 1, the liquid collection cylinder 90 can be separated from the connecting pipe 13 at one end 65 by removing the 12 bolts.

<Operation>
FIG. 3 is a diagram for explaining each operation of the oil recovery step and the strainer clogging removal step using the enlarged vertical sectional view of the present apparatus shown in FIG. As shown in FIG. 3, the oil component 31 suspended and retained in the tank 10 can be discharged to the outside via the connecting pipe 13, the liquid collection cylinder 90, and the oil component recovery pipe 14 with the pressure P in the interior 12, and is regenerated. It can also be used. The oil component 31 has been described as being back-injected into the oil recovery tube 14 by the pressure P inside the tank 10. In that case, it is also conceivable to slightly open the outflow control valve 41 of the outflow pipe 40 located below the tank 10. Even in that case, the operation of closing the inflow pipe 16 and the cleaning fluid press-fit pipe 64 is still necessary.

  In addition, the horizontal cross-section (liquid-passing direction, that is, a cross section perpendicular to the central axis Z) of the liquid collection tube 90 in FIGS. 1 to 3 is not particularly limited, but is preferably a circular shape. That is, if the shape is circular, it matches with the discharge port of a general activated carbon tower and the shape of the connecting pipe. Thus, matching with a general shape is convenient because it saves the trouble of adding unnecessary joints and the like in installation and replacement.

  The activated carbon 20 clogging the first filter unit 60 can be detached by the cleaning fluid 8 that is press-fitted from the connecting pipe 13 into the interior 12. As described above, the cleaning fluid press-fit pipe 64 is depicted with an open end in FIGS. 1-3 and is referred to as an open end 68, which clearly illustrates the partial shape of the tubular member. This is for the convenience of explanation. The open end 68 is not open in the activated carbon tower 100 in operation, and the cleaning fluid press-in means 81 is connected in a sealed state. The cleaning fluid press-fitting means 81 can press-fit the cleaning fluid 8 appropriately toward the inside of the liquid collecting cylinder 90.

<Liquid collection strainer>
FIG. 4 is a front view showing an appearance of a liquid collection strainer used in the present apparatus. As shown in FIG. 4, the liquid collection strainer 1 has a shape having a neck portion 3 and a tail portion 5 extending from a head portion 2 forming a filter body. The head 2 constitutes a hollow filter body in which slits 6 having openings that can prevent the passage of the activated carbon 20 are formed. The neck 3 is a tubular member that extends in communication with the internal space of the head 2. The neck 3 is formed with a male screw for attachment on the outer periphery. The nut 7 is formed with a female screw that can be screwed with a male screw formed on the neck 3. The tail portion 5 extends in a tubular shape from the neck portion 3 and is formed so that the internal space communicates with the opening 4 of the terminal. There is no need for a male screw in the tail portion 5.

  Here, the counterpart to which the liquid collection strainer 1 is attached is the first partition plate 69 and the second partition plate 79. The through holes 61 to 63 and 71 to 75 are inserted from the tail portion 5 to the neck portion 3, and the neck portion 3 is screwed with the nut 7. Based on the thickness of the first partition plate 69 and the second partition plate 79, the length of the neck portion 3 formed with the male screw is defined. Or if the length of the neck part 3 is prescribed | regulated previously, the thickness of the 1st partition plate 69 or the 2nd partition plate 79 will be adjusted appropriately, and it respond | corresponds so that attachment is possible.

  Moreover, the material of this liquid collection strainer 1 is a polyvinylidene fluoride (PolyVinylidene DiFluoride, PVDF) or polyvinyl chloride (PVC) as an example. With these PVDF or PVC, the liquid collection strainer 1 is formed by integrally molding the head 2, the neck 3 and the tail 5. Only the nut 7 is a separate part. As described above, the liquid collection strainer 1 is generally integrally formed of a single material.

<Operation (maintenance) method of activated carbon tower>
FIG. 5 is a flowchart for explaining the procedure of the method for operating the activated carbon tower (hereinafter also referred to as “the present method”). As shown in FIG. 5, the present method includes a normal operation continuation step (S10), an outflow restriction step (S20), an oil component recovery step (S30), an oil component reuse step (S40), and a strainer clogging removal step. (S50).

  In the normal operation continuation step (S10), normal operation is continued. In the outflow restriction step (S20), the outflow control valve 41 is closed or restricted to stop the outflow of the processing fluid 30 from the outflow pipe 40 protruding from the bottom 15 of the tank 10 and communicating from the inside 12 of the tank. Or restrict. In the oil content recovery step (S30), the oil content 31 suspended and retained at the top of the tank 10 is recovered by causing the pressure P in the tank to flow backward to the oil content recovery pipe 14 protruding above the tank 10 outward.

  In the oil reuse step (S40), the oil 31 recovered from the oil recovery pipe 14 in the oil recovery step (S30) is returned to its original use and reused. For example, in the production process of a high-purity nickel sulfate aqueous solution, the main component of the oil 31 is an extractant whose functional group is 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (“trade name: PC88A”, Daihachi Chemical Industries Ltd. Company-made). The original use is to remove impurities from a crude nickel sulfate aqueous solution by a solvent extraction method.

  Further, in the strainer clogging removing step (S50), the cleaning fluid 8 is inserted into the liquid collecting cylinder 90 from the cleaning fluid press fitting pipe 64 which is implanted in the peripheral wall 67 of the liquid collecting cylinder 90 and communicates with the liquid collecting cylinder 90 by the cleaning fluid press fitting means 81. The clogging of the liquid collection strainer 1 disposed on the first partition plate 69 of the liquid collection cylinder 90 is removed. The liquid collecting cylinder 90 is configured to be detachable so that one end 65 having an inner diameter D corresponding to the opening of the connecting pipe 13 communicating with the inside of the tank and having a space G of a predetermined height L is fluid-tightly communicated. .

  In this method, the normal operation continuation step (S10) to the strainer clogging removal step (S50) are sequentially executed. According to this method, the fluid 30 to be treated, which is turbid with substances having different specific gravities, is circulated in the tank 10 so that impurities are adsorbed and removed by the activated carbon 20 while separating the fluid 30 by specific gravity. You can drive. Furthermore, this normal operation and maintenance can be repeated alternately.

  In this method, the outflow restriction step (S20), the oil component recovery step (S30), the oil component reuse step (S40), and the strainer clogging removal step (S50) are referred to as maintenance in distinction from the normal operation. Therefore, this maintenance is not included in the normal operation continuation step (S10) in this method. However, if the maintenance mentioned here is very frequent and executed as a routine work, it may be called normal operation or operation, including this maintenance. It is only a difference in the expression of process management.

  For example, it is suitable for an activated carbon tower in which an aqueous solution obtained by adsorbing and removing oil components mixed in an aqueous solution as an impurity component is discharged from the bottom of the tower. Further, in periodic maintenance of the activated carbon tower, etc., it is also suitable for a method of draining the oil component that floats and stays at the top of the activated carbon tower with upward reverse injection from the tank. At this time, it is also effective as an outflow prevention measure for preventing the activated carbon filled in the tank of the activated carbon tower from flowing out of the tank.

  Furthermore, after the oil draining associated with the reverse injection described above is performed, in the first filter unit 60, the slit 6 of the head 2 of the liquid collection strainer 1 is clogged by the activated carbon 20. By blowing off the clogging into the inside 12 of the tank 10 with the cleaning fluid 8 that press-fits from the cleaning fluid press-in pipe 64, it is possible to prevent a decrease in operating efficiency.

  The activated carbon tower according to the present invention may be adopted in an activated carbon tower in which a liquid turbid liquid having different specific gravity is circulated in a tank by a pump and impurities are adsorbed and removed while separating the liquid substance by specific gravity. is there. Moreover, the operation method of the activated carbon tower which concerns on this invention may be employ | adopted as a maintenance method of the activated carbon tower. Furthermore, the activated carbon backflow prevention device according to the present invention may be employed in order to improve the function by being attached to a conventional activated carbon tower.

  As described above, each embodiment and each example of the present invention has been described in detail. However, it should be understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. It will be easy to understand. Therefore, all such modifications are included in the scope of the present invention.

  For example, a term described with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings. Further, the configuration, operation, and operation method of the activated carbon tower are not limited to those described in the embodiments and examples of the present invention, and various modifications can be made.

  DESCRIPTION OF SYMBOLS 1 Collection strainer, 2 head, 3 neck, 4 opening, 5 tail, 6 slit, 7 nut, 8 cleaning fluid, 9 (tank 10) peripheral wall, 10 tank, 11 (tank 10) top part, 12 (tank) 10) inside, 13 (tank top 11) connecting pipe, 14 oil collecting pipe, 15 (tank 10) bottom, 16 inflow pipe, 17 tank side flange, 18, 19, 89, 93, 95 bolt holes, 20 activated carbon, 21 bolt, 22 lid flange, 30 fluid to be treated, 31 oil, 40 outflow pipe (downward from tank interior 12), 41 outflow control valve, 60 first filter section, 61-63 (first partition) Through-hole of plate 69, 64 cleaning fluid press-fit pipe, 65 one end of liquid collection tube 90, 66 the other end of liquid collection tube 90, 67 peripheral wall of liquid collection tube 90, 68 (cleaning fluid press-fit tube) 4) open end, 69 first partition plate, 70 second filter portion, 71-73 through hole (of second partition plate 79), 79 second partition plate, 80 pump, 81 pump (cleaning fluid press-in means), 90 liquid collecting cylinder, 91 cleaning fluid injection pipe, 92 lower flange, 94 upper flange, 99 activated carbon backflow prevention device (this device), 100 activated carbon tower, C (first partition plate 69) outer diameter, D (liquid collection) Inner diameter of cylinder 90, E, K, M arrows, L (predetermined liquid collection cylinder 90) predetermined length, G (collection cylinder 90) space, J (inflow pipe 16) inner diameter, K (outflow pipe 40) ) Inner diameter, inner diameter (outflow pipe 40), P (pressure inside tank 12), S10 normal operation continuation process, S20 outflow restriction process, S30 oil content recovery process, S40 oil content reuse process, S50 removal process, T tank Inner diameter, Z center axis

Claims (8)

An activated carbon backflow prevention device attached to an activated carbon tower for injecting and removing impurities contained in the treated fluid from the top of a tank filled with activated carbon,
A liquid collecting cylinder that is connected to the inside of the tank by being tightly connected at one end to a connecting pipe that is protruded by opening a tubular member having an inner diameter smaller than the inner diameter of the tank at the top of the tank;
An oil recovery pipe connected to the other end of the liquid collecting cylinder and communicating from the inside of the tank to the outside via the liquid collecting cylinder;
A cleaning fluid press-fitting pipe that branches off from the peripheral wall of the liquid collecting tube and communicates a cleaning fluid press-fitting means to the liquid collecting tube;
A first filter part disposed at the top of the tank and interposed in the flow path,
The first filter portion has a first partition plate having an outer diameter larger than the inner diameter of the liquid collecting cylinder that is tightly sandwiched between the one end of the liquid collecting cylinder and the connecting pipe,
One or more through holes are formed in the first partition plate;
A collection strainer is detachably attached to each through hole,
The oil component suspended and retained in the tank can be discharged from the oil component collection pipe with the pressure inside the tank,
The activated carbon adhering to the lower side of the liquid collection strainer of the first filter unit by press-fitting a cleaning fluid into the liquid collection cylinder from the cleaning fluid press-fitting means through the cleaning fluid press-fitting pipe, Activated carbon backflow prevention device blown down into the tank. An activated carbon tower for flowing a fluid to be treated from the top of a tank filled with activated carbon to adsorb and remove impurities contained in the fluid to be treated,
A tubular member having an inner diameter smaller than the inner diameter of the tank is opened at the shoulder near the top of the tank and protrudes to communicate with the inside of the tank; and
A connecting pipe that projects from the top of the tank with a tubular member having an inner diameter that is smaller than the inner diameter of the tank and that projects from the tank;
A tubular member having an inner diameter smaller than the inner diameter of the tank is opened in the vicinity of the bottom of the tank so as to project from the inside of the tank.
A first filter part and a second filter part respectively disposed on the top and bottom of the tank and interposed in the flow path,
The oil component suspended and retained in the tank can be discharged from the connecting pipe with the internal pressure,
The activated carbon tower in which the activated carbon clogged in the first filter part can be removed by a cleaning fluid press-fitted into the interior so as to pass through the connecting pipe. A liquid collecting cylinder detachable so as to communicate liquid-tightly with one end having a space of a predetermined height with an inner diameter coinciding with the opening of the connecting pipe;
An oil collecting pipe connected to the other end of the liquid collecting pipe and communicating from the inside of the tank via the liquid collecting pipe;
The tank forms a peripheral wall by a cylinder having a vertical central axis,
Movement is regulated by surrounding the activated carbon by the peripheral wall, the first filter part, and the second filter part,
The first filter portion includes a first partition plate that is sandwiched in a liquid-tight manner between the one end of the liquid collecting cylinder and the connecting pipe and has an outer diameter larger than an inner diameter of the liquid collecting cylinder;
The second filter portion has a second partition plate disposed so as to be separable from above and below over the entire inner surface of the tank near the bottom of the tank,
One or more through holes are formed in each of the first partition plate and the second partition plate,
A liquid collection strainer is detachably attached to each through hole,
A cleaning fluid press-fitting pipe that branches and communicates at right angles to the central axis extends to the peripheral wall of the liquid collecting cylinder,
The activated carbon tower according to claim 2, wherein the cleaning fluid can be press-fitted by a cleaning fluid press-in means from the open end of the cleaning fluid press-fit pipe toward the inside of the liquid collecting cylinder. The liquid collection strainer is
Polyvinylidene fluoride (PolyVinylidene DiFluoride, PVDF) or polyvinyl chloride (PVC),
A hollow head formed with slits of openings that can block the passage of activated carbon;
A tubular neck extending in an internal space in communication with the head;
A tail portion that extends in a tubular shape from the neck portion and communicates with the internal space from the opening of the terminal;
A nut formed with a male screw that can be screwed together with a male screw formed on the neck, and
The neck is inserted into the through hole, the neck is screwed with the nut,
The activated carbon tower according to claim 3, wherein the activated carbon tower can be replaced as appropriate. The mounting form of the liquid collection strainer in the first filter section is arranged with the head on the lower surface side of the horizontal first partition plate,
5. The activated carbon tower according to claim 3, wherein an attachment form of the liquid collection strainer in the second filter section is a form in which the head is disposed on an upper surface side of the horizontal second partition plate. A predetermined range of 35% to 65% with respect to the height in the space of the liquid collecting cylinder is set to the height of the middle stomach
The collection strainer communicates the opening of the tail with the space at the middle height,
6. The activated carbon tower according to claim 4, wherein the cleaning fluid press-fitting pipe branches from the peripheral wall of the liquid collecting cylinder at the middle height and communicates with the space. An activated carbon tower in which a fluid to be treated that is turbid with substances having different specific gravity is circulated in a tank, and the normal operation in which the activated carbon is adsorbed and removed while separating the fluid to be treated by specific gravity and oil recovery and cleaning are alternately repeated. Driving method,
A normal operation continuation step of continuing the normal operation;
An outflow limiting step for stopping or limiting the outflow of the fluid to be processed from an outflow pipe that protrudes from the bottom of the tank and communicates from the inside of the tank by closing or limiting an outflow control valve;
An oil content recovery step for recovering the oil content suspended and retained at the top of the tank by causing the oil pressure in the tank to flow backward to an oil content recovery pipe protruding above the tank and recovering the oil content;
An end having a predetermined height and an inner diameter corresponding to the opening of the connecting pipe communicating with the inside of the tank is implanted in the peripheral wall of the detachable liquid collecting cylinder so as to communicate in a liquid-tight manner. A strainer clogging removal step of removing clogging of the liquid collection strainer disposed on the first partition plate of the liquid collection cylinder by press-fitting the cleaning fluid into the liquid collection cylinder from the cleaning fluid injection pipe by the cleaning fluid injection means. When,
A method for operating an activated carbon tower having   The operation method of the activated carbon tower according to claim 7, further comprising an oil content recycling step in which the oil content recovered from the oil content recovery pipe in the oil content recovery step is returned to its original use and reused.