JP3537138B2 - Dissolved inorganic substance adsorption device, dissolved inorganic substance adsorption method and dissolved inorganic substance adsorbent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adsorbing dissolved inorganic substances, such as arsenic, for removing dissolved inorganic substances from dissolved water.
The present invention relates to a dissolved inorganic matter adsorption method and a dissolved inorganic matter adsorbent.

[0002]

2. Description of the Related Art Conventional techniques for removing arsenic dissolved in water include, for example, JP-A-52-9963, JP-A-52-48592 and JP-A-62-1269.
There is one disclosed in Japanese Patent Publication No. That is, water is filtered with an adsorbent using iron oxide as an adsorbent, and arsenic is adsorbed and removed. However, there has been a problem that the arsenic-adsorbed iron oxide gradually solidifies and hinders the passage of water, thereby reducing the throughput. In order to solve this problem, there is a method of removing the clogging by periodically flowing back from the outlet to the inlet.

[0003]

However, in the prior art using the backflow, there is a problem that the arsenic removal processing is stopped while clogging is eliminated by the backflow, thereby reducing the throughput. .

The present invention has been made in view of such conventional problems, and provides a dissolved inorganic substance adsorbing apparatus, a dissolved inorganic substance adsorbing method, and a dissolved inorganic substance adsorbent which enable continuous treatment while maintaining a processing amount. It is aimed at.

[0005]

In order to achieve the above object, a dissolved inorganic matter adsorption apparatus according to the present invention is spirally wound with a treatment tank having an inlet at the bottom and an outlet at the top. Dissolved inorganic matter adsorbent having a flake shape and contained in the processing tank, and dissolved water of the dissolved inorganic matter in the inflow port at a pressure to stir the adsorbent so as to float and rotate inside the processing tank. And a pump for feeding the pressure.

The method for adsorbing dissolved inorganic matter according to the present invention is directed to a treatment tank having an inlet at the bottom and an outlet at the top, and containing a helically wound flake-shaped dissolved inorganic adsorbent. Dissolved water of the dissolved inorganic substance is sent into the inside from the inflow port, and the adsorbent is stirred so as to float and rotate inside the processing tank to adsorb the dissolved inorganic substance to the adsorbent.

[0007] In the dissolved inorganics adsorption apparatus according to the present invention, the dissolved inorganics adsorbent is accommodated in the treatment tank by sending dissolved inorganics dissolved water to the bottom inlet by a pump. The adsorbent is stirred inside the processing tank by the pressure of the pump. In the dissolved inorganic matter adsorption apparatus and the dissolved inorganic matter adsorption method according to the present invention, the adsorbents are separated from each other by the stirring of the adsorbent, and a flow path is secured between the adsorbents. In this manner, clogging of the adsorbent is prevented, and continuous processing can be performed while maintaining the processing amount. In addition, the surface of the adsorbent is rubbed by applying pressure and being stirred, so that the adsorbed portion is peeled off and the adsorbing effect can be maintained. The treated water is discharged from the upper outlet.
Note that the adsorbent is accommodated in the processing tank with a sufficient space for stirring.

The dissolved inorganic substance treated by the dissolved inorganic substance adsorption apparatus and the dissolved inorganic substance adsorption method according to the present invention is, for example, arsenic, and the adsorbent used is, for example, iron or iron oxide.

In the apparatus for adsorbing dissolved inorganic matter according to the present invention, it is preferable that the inflow port is provided with a plurality of ejection sections, and the adsorbent has a spiral flake shape. In this case, since a plurality of outlets at the inflow port are provided, dissolved water flowing from the plurality of outlets can interfere with each other to enhance the effect of stirring the adsorbent. In addition, since the adsorbent is formed of spiral flakes, it is easy to secure a flow path in the gap formed by the spiral, and it is unlikely to cause clogging. Furthermore, since the adsorbent is spiral,
It is easy to move under the pressure of the pump, is less likely to cause clogging, and has a surface that is easily rubbed, and the adsorbed portion can be peeled off to maintain the adsorbing effect. In addition, since the adsorbent is spiral, it has a large surface area and a large amount of adsorption. For the helical flakes, for example, it is preferable to use cuttings from a steel lathe to remove arsenic.

[0010] The dissolved inorganic matter adsorbing apparatus according to the present invention has a centrifugal separator, the centrifugal separator has an inlet and an outlet,
Preferably, the inlet is connected to the outlet, and has a configuration in which solid matter is separated from the inflow from the inlet by centrifugation, and treated water is discharged from the outlet.

In this case, the water discharged from the discharge port of the processing tank enters the centrifuge through the inlet. The wastewater from the discharge port of the treatment tank contains solid matter such as an adsorbed portion separated from the adsorbent, and the solid matter is separated from water by centrifugation inside the centrifuge. Thus, only the portion of the adsorbent on which the inorganic substance has been adsorbed can be disposed of, so that the amount of waste can be reduced as compared with the case where all the adsorbents are replaced.

[0012] The dissolved inorganic matter adsorption apparatus according to the present invention preferably has a rotating blade for rotating a flow path between the pump and the inlet by a flow pressure to change a flow rate of dissolved water flowing through the flow path. . In this case, since the cross-sectional area of the flow path changes due to the rotation of the rotary blade, the flow velocity of the dissolved water flowing through the flow path changes. For this reason, the water whose flow velocity has changed from the inlet at the bottom of the processing tank enters the inside, and the adsorbent is easily stirred.

The dissolved inorganic adsorbent according to the present invention is characterized in that it has a spiral flake shape. The dissolved inorganic adsorbent according to the present invention can easily secure a flow path in a gap formed by a spiral, and does not easily cause clogging. Furthermore, since the dissolved inorganic adsorbent according to the present invention is helical, it easily moves under the pressure of the pump, hardly causes clogging, and the surface is easily rubbed, and the adsorbed portion is peeled off to maintain the adsorbing effect. Can be. Further, the dissolved inorganic adsorbent according to the present invention has a large surface area and a large amount of adsorption due to the spiral shape.
For the helical flakes, for example, it is preferable to use cuttings from a steel lathe to remove arsenic.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the present invention. As shown in FIGS. 1 and 2, the dissolved inorganic substance adsorption device includes a processing tank 1, a dissolved inorganic substance adsorbent 2, a pump 3, a centrifugal separator 4, and a magnetic processor 5.

The processing tank 1 has a cylindrical portion 11, a bottom portion 12, and an upper portion 13, and is sealed. The bottom part 12 closes one end opening of the cylindrical part 11, and the top part 13 closes the other end opening. The processing tank 1 has an inlet 14 at the center of the bottom 12 and an outlet 15 at the top 13. The inlet 14 is
Consists of a tube.

The processing tank 1 is provided with a partition wall 16 that crosses the cylindrical portion 11 at a distance from the bottom portion 12 near the bottom portion 12 inside.
have. The partition 16 is provided at the bottom 1 inside the cylindrical portion 11.
A closed gap 17 is formed in the vicinity of 2. As shown in FIG. 3, a plurality of strainers 18 are provided on the partition wall 16. Each strainer 18 traverses the bulkhead 16,
An inflow port is provided on the gap 17 side, and a slit-shaped outflow port is provided inside the cylindrical portion 11 on the opposite side. The plurality of strainers 18 constitute a plurality of ejection portions of the inlet 14 of the processing tank 1. Gravel 6 is packed in the upper part 13 of the partition 16 to such a height that each strainer 18 is buried. Gravel 6
Is a support material for the adsorbent 2.

The outlet 15 has two strainers 15a,
15b. Each strainer 15a, 15b
Has a slit-shaped inlet at the upper part and an outlet at the lower part. The outlet is connected to and supported by the discharge pipe 19. The discharge pipe 19 penetrates and is fixed to the side surface of the cylindrical portion 11.

The dissolved inorganic adsorbent 2 has a spiral flake shape. The adsorbent 2 is made of cuttings (cuts) by a steel lathe, and has a width of 3 to 4 mm, for example.
It is formed by winding a thin piece of steel having a length of about 10 mm in a spiral shape having a diameter of about 5 mm. The adsorbent 2 has red rust formed on the surface in order to enhance the arsenic adsorption effect. Iron and iron oxide have the effect of adsorbing arsenic. The adsorbent 2 is accommodated in the processing tank 1 with a sufficient space for stirring.

An upper portion 13 of the processing tank 1 is provided with an air vent valve 20 and a suspension ring 21, and a lid 22 capable of opening and closing the cylindrical portion 11 is attached to a side surface of the cylindrical portion 11. The inlet 14 is connected to the two pumps 3 by a pipe 8 via a valve 7. The pump 3 has an inlet 14 with a pressure that causes the adsorbent 2 to be stirred inside the processing tank 1.
Send arsenic dissolved water to

The centrifuge 4 has an inlet 41 and an outlet 42, and the inlet 41 is connected to the outlet side of the discharge pipe 19. The centrifugal separator 4 includes a cyclone separator, has a configuration in which a rotor is rotated by a water stream, solids are separated from an inflow from the inlet 41 by centrifugal separation, and treated water is discharged from an outlet 42. I have. A coagulant may be added to the centrifuge 4 to facilitate solid-liquid separation of the arsenic adsorbate. The magnetic processor 5 is connected to the outlet 42 via the pipe 8. The magnetic processor 5 removes the fragments of the adsorbent 2 mixed with the water discharged from the outlet 42 by magnetic force, and discharges the treated water to the valve 9. The magnetic processor 5 is connected to the sand filtration system via a valve 9, a pipe 8, a check valve 10, and a valve 31. The valve 7 and the check valve 10 are connected by a pipe 8 via a valve 32.

In the dissolved inorganic substance adsorption device, the dissolved water of the dissolved inorganic substance is sent to the inflow port 14 of the bottom portion 12 by the pump 3, and the arsenic is adsorbed on the arsenic adsorbent 2 stored in the processing tank 1. The adsorbent 2 is stirred inside the processing tank 1 by the pressure of the pump 3 and floats and rotates as a whole,
Makes a frightening movement. By the stirring of the adsorbents 2, the adsorbents 2 are separated from each other, and a flow path is secured between the adsorbents 2. Thus, clogging of the adsorbent 2 can be prevented, and continuous processing can be performed while maintaining the processing amount. The adsorbent 2 is
The surface is rubbed by applying pressure and stirring,
The adsorbed portion can be peeled off to maintain the adsorbing effect. The treated water is discharged from a discharge port 15 of the upper part 13.

In the apparatus for adsorbing dissolved inorganic matter, since a plurality of strainers 18 constituting the ejection portion of the inlet 14 are provided, dissolved water flowing from the plurality of strainers 18 interfere with each other to reduce the stirring effect of the adsorbent 2. Can be enhanced. In addition, since the adsorbent 2 is formed of a spiral flake, a flow path is easily secured by the gap 17 formed by the spiral, and clogging is unlikely to occur. Further, since the adsorbent 2 has a spiral shape, the adsorbent 2 easily moves under the pressure of the pump 3 and is less likely to be clogged.
The surface is easily rubbed, and the adsorbed portion can be peeled off to maintain the adsorbing effect. Further, since the adsorbent 2 is spiral, it has a large surface area and a large amount of adsorption.

The water discharged from the discharge port 15 of the processing tank 1 enters the centrifuge 4 through an inlet 41 thereof. The wastewater from the discharge port 15 of the treatment tank 1 contains solids such as an adsorbed portion separated from the adsorbent 2, and these solids are separated from water by centrifugation inside the centrifuge 4. You. Thus, only the portion of the adsorbent 2 on which the inorganic substance is adsorbed can be disposed of, so that the amount of waste can be reduced as compared with the case where all of the adsorbent 2 is replaced. The water discharged from the outlet 42 of the centrifugal separator 4 has the debris of the adsorbent 2 removed by the magnetic processor 5 and further purified by the sand filtration system.

As shown in FIG. 4, the dissolved inorganic matter adsorption device rotates the flow path in the pipe 8 between the pump 3 and the inflow port 14 by the flow pressure to change the flow rate of the dissolved water flowing through the flow path. It is preferable to have a rotating blade 40 that varies. In this case, since the cross-sectional area of the flow path changes due to the rotation of the rotary blade 40, the flow velocity of the dissolved water flowing through the flow path changes, resulting in a pulsating flow.
For this reason, the water whose flow velocity has changed from the inflow port 14 of the bottom 12 of the processing tank 1 enters the inside, and the adsorbent 2 is easily stirred.

The processing tank 1 having a diameter of 400 mm and a height of 1200 mm in the dissolved inorganic matter adsorption apparatus of the above-described embodiment.
Gravel 6 was filled at a height of 90 mm and adsorbent 2 at a height of 40 cm, and dissolved water was fed at a rate of 60 liters per minute. As a result, the raw water before the treatment has a concentration of arsenic and its compound of 1.
The treated water discharged from the centrifugal separator 2 after 2 hours and the treated water discharged from the centrifugal separator 4 after 13.5 hours had both arsenic and its compound concentrations of 0.003 mg / l. l. The weighing method was based on JIS K 0102 61.2.

The apparatus for adsorbing dissolved inorganic matter according to the above-described embodiment may be used for treating dissolved inorganic matter other than arsenic by using an adsorbent suitable for the dissolved inorganic matter according to the type of dissolved inorganic matter.

[0027]

According to the present invention, it is possible to provide a dissolved inorganic substance adsorption apparatus, a dissolved inorganic substance adsorption method, and a dissolved inorganic substance adsorbent which enable continuous treatment while maintaining the treatment amount.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an entire dissolved inorganic matter adsorption device according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a processing tank and a centrifugal separator of the dissolved inorganic matter adsorption device of FIG.

FIG. 3 is a cross-sectional view of the vicinity of the bottom of the processing tank of FIG. 1;

FIG. 4 is a schematic configuration diagram showing a rotating blade of the dissolved inorganic matter adsorption device of FIG. 1;

[Explanation of symbols]

1 Processing tank 2 Adsorbent 3 pump 4 centrifuge 5 Magnetic processing machine 6 gravel

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-2000-176441 (JP, A) JP-A-60-172397 (JP, A) JP-A-5-23678 (JP, A) JP-A 48-23052 (JP, A) JP-A-10-165941 (JP, A) JP-B-7-47097 (JP, B2) JP-T-63-501276 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) C02F 1/28 B01J 20/00-20/34

Claims (6)

(57) [Claims] 1. A treatment tank having an inlet at the bottom and an outlet at the top, an adsorbent for a dissolved inorganic substance having a helically wound flake shape and housed inside the treatment tank, A pump for feeding dissolved water of the dissolved inorganic substance to the inflow port at a pressure for stirring the adsorbent so as to float and rotate inside the processing tank. 2. The adsorption of dissolved inorganic matter according to claim 1, wherein said inflow port is provided with a plurality of ejection portions, and said adsorbent is made of steel chips by a lathe and has red rust formed on a surface thereof. apparatus. 3. A centrifuge, said centrifuge having an inlet and an outlet, said inlet being connected to said outlet, for separating solids from the inflow from said inlet by centrifugation. The apparatus for adsorbing dissolved inorganic matter according to claim 1 or 2, wherein the apparatus has a configuration for discharging treated water from the outlet. 4. A rotation for rotating a flow path between the pump and the inflow port so as to change a cross-sectional area of the flow path by a flow pressure and changing a flow rate of the dissolved water flowing in the flow path to form a pulsating flow. The dissolved inorganic matter adsorption device according to claim 1, 2 or 3, further comprising a blade. 5. An inflow port at the bottom and a discharge port at the top,
Dissolved water of the dissolved inorganic substance is sent from the inflow port to the inside of the processing tank containing the adsorbent of the dissolved inorganic substance having the shape of a flake wound spirally, and the adsorbent is lifted and rotated inside the processing tank. A dissolved inorganic substance is adsorbed to the adsorbent by stirring the mixture so as to be dissolved. 6. A dissolved inorganic substance adsorbent characterized in that it has a flaky shape wound spirally, is made of steel chips by a lathe, and has red rust formed on its surface.