JP2000218106A - Liquid treatment apparatus and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid treatment apparatus for efficiently and rapidly removing a suspended substance(SS) and org. matter or chloride ions in a liquid and a liquid treatment method using the same. SOLUTION: A liquid treatment apparatus 10 is equipped with a filter member 15 obtained by winding a wire material having projections 11 formed on the surface thereof around a cylindrical body 12 and forming a large number of gaps 14 to the peripheral wall 13 of the cylindrical body 12 by the projections 11 and the liquid treating substance 16 housed in the cylindrical body 12 of the filter member 15. Primary treatment filtering a solid component when a liquid flows in the cylindrical body 12 from the gaps 14 is performed and, subsequently, the liquid comes into contact with the liquid treating substance 16 to perform secondary treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid processing apparatus and a liquid processing method in which fine solids in a liquid are filtered and subjected to a primary treatment, and then the liquid is brought into contact with a liquid treatment substance to perform a secondary treatment. .

[0002]

2. Description of the Related Art To purify source water to be treated in a large-scale treatment facility such as clean water, middle water, industrial water, etc., first, as a primary treatment step, a fine solid suspended substance (SS) contained in the source water is used. ) Is removed by filtration using a coagulation sedimentation device or a sand filtration device, and then, as a secondary treatment step, the treated water is treated with a treatment device filled with activated carbon or an ion exchange resin. Also, at the time of sewage treatment, fine solids in source water are removed by a filtration device prior to activated carbon treatment or the like.

[0003] From the economical point of view, a large number of compact filtration devices may be used in parallel instead of the coagulation sedimentation device and the sand filtration device. For example, Japanese Patent Application Laid-Open No. 8-196821 proposes a filter using a filter in which a gap for fluid passage is formed between adjacent wheels of a spirally wound wire. As shown in FIG. 3, the filter body 1 of this apparatus is formed by spirally winding a wire having a circular cross section provided with a plurality of protrusions A along the outer peripheral portion, and a gap for fluid passage between adjacent rings of the wire. B is provided,
The entire filter body is formed in a coil shape.

FIG. 4 shows a filtration device using the coil type filter 1. The top fitting 3 is attached to the attachment hole of the tube sheet 7 provided in the apparatus main body, the filter 1 is attached to the top fitting 3, and the upper end of the core metal 2 having the bottom fitting 4 attached to the lower end with a nut 5 is attached to the top fitting. 3 and fastened with a nut 6 from above. Then, a filter aid 8 made of diatomaceous earth or diatomaceous earth as a main component and mixed with a powder such as pulp powder or activated carbon is attached to the periphery of the filter 1. At the time of filtration, fluid flows into the inside from the outer peripheral portion of the filter body 1 as shown by the arrow and is discharged from above. At this time, minute solids to be filtered are captured by the gap B or the filter aid 8 and removed. . By performing the filtration operation for a predetermined period, the filter 1
When the fluid resistance (differential pressure) increases due to the accumulation of solids in the liquid, back washing is performed to restore the fluid to its initial state.

[0005]

However, a conventional liquid processing apparatus which performs two-stage processing of a filtration apparatus and a processing apparatus requires a large area for installation of the apparatus, and requires complicated operation and processing cost. It has the problem of becoming expensive. Further, even when the filter described in JP-A-8-196821 is used, the amount of activated carbon and the like attached to the filter is extremely small, so that the filter only has a function of assisting the filtration, and the filtered liquid is completely removed. In order to perform the treatment, it is necessary to separately provide a secondary treatment device using activated carbon or an ion exchange resin, and the problem of the installation area and the like still remains. Accordingly, it is an object of the present invention to provide a liquid processing apparatus which solves such a problem and a processing method using the same.

[0006]

According to a first aspect of the present invention, there is provided a method for forming a cylindrical body by winding a linear body having a projection on the surface into a coil shape, and forming the projection on the surface. A liquid processing apparatus comprising: a filter having a plurality of gaps formed in a peripheral wall portion of a cylindrical body; and a liquid processing substance accommodated in the cylindrical body of the filter. The invention according to claim 2 is an embodiment of the liquid treatment apparatus according to claim 1, wherein the liquid treatment substance is an ion exchange resin or activated carbon.

[0007] The third aspect of the present invention provides the first aspect.
Alternatively, using the liquid processing apparatus according to claim 2, the liquid to be treated is introduced into the cylinder from around the filter to remove solids in the liquid, and then the liquid introduced into the cylinder is removed from the liquid. A liquid treatment method characterized by treating by contacting with a treatment substance. Further, the invention according to claim 4 is a preferred embodiment of the liquid treatment method according to claim 3, wherein a plurality of liquid treatment devices are used, and the liquid to be treated is sequentially passed through each liquid treatment device. It is characterized by the following.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one example of the liquid processing apparatus of the present invention. The liquid processing apparatus 10 forms a cylindrical body 12 by winding a linear body having a large number of protrusions 11 on the surface into a coil shape, and the protrusions 11 form a large number of gaps on a peripheral wall 13 of the cylinder 12. The filter body 15 includes a filter body 15 formed therein and a liquid processing substance 16 such as activated carbon or ion exchange resin housed in the cylindrical body 12. As the linear material, a metal wire having corrosion resistance, such as a stainless steel wire, or a linear material made by stretching a hard fiber-reinforced plastic can be used. It is formed to have. In order to form a large number of protrusions 11 on the surface of the linear body, for example, there is a method of passing the linear body between rolls having an uneven surface.

The lower end of the cylindrical body 12 is pressed by a lower pressing member 17 formed in a cap shape and having a through hole in the center. The upper end of the cylindrical body 12 is similarly formed in a cap shape and has a stepped portion 18a of an upper pressing member 18 provided with a through hole in the center.
Is pressed through the net plate 19. The mesh plate 19 is provided to prevent the liquid processing substance 16 contained in the cylindrical body 12 from flowing out. A plurality of openings 20 through which the processed liquid flows out are provided in the upper part of the upper holding member 18, and further, a screw portion 20a for attaching the liquid processing apparatus 10 to processing equipment (not shown) is provided on the outer periphery thereof. Are formed. The lower holding member 17 and the upper holding member 18 are detachably connected to each other by a holding nut 22 and a holding nut 23 with a bolt 21 passing through each through hole. The liquid processing substance 16 is filled before the upper holding member 18 is attached to the cylinder 12.

Next, the operation of the liquid processing apparatus 10 shown in FIG. 1 will be described. First, the bolt 2 is passed through the through hole of the lower holding member 17.
1 and the holding nut 23 is screwed appropriately. Next, the lower part of the cylindrical body 12 inserted through the through bolt 21 is supported by the lower holding member 17. Next, after a predetermined amount of the liquid processing substance 16 is accommodated in the cylindrical body 12, the upper holding member 18 is mounted on the upper portion thereof via the mesh plate 19, and the holding nut 22 is screwed to assemble the filter body 15. next,
The filter body 15 is attached to processing equipment (not shown) using the screw portion 20a.

When the liquid to be treated flows into the inside as shown by the arrows from a number of gaps 14 formed in the peripheral wall 13 of the cylindrical body 12, fine solids floating in the liquid are filtered. Processing is performed. Next, the liquid that has flowed into the cylindrical body 12 comes into direct contact with the liquid processing substance 16 to perform a secondary processing for removing impurities and the like. Then, the processed liquid flows out of the opening 19 of the upper holding member 18 to the secondary side of the processing equipment. When the processing device 10 is operated for a long time, the cylinder 12
The solid content gradually accumulates in the gap portion 14 and clogs the clogging, thereby increasing the resistance to the flow. Therefore, it is desirable to remove the clogging by back washing at appropriate time intervals. The reverse cleaning is performed by injecting a cleaning gas such as a cleaning liquid or air from the opening 19 of the upper holding member 18 and discharging the cleaning gas from the gap 14. In addition, the activated carbon and the ion exchange resin stored as the liquid treatment substance 16 can be simultaneously regenerated at the same time as the back washing. In the case of performing such a regeneration treatment, a regeneration solution (acid, alkali, organic solvent, etc.) of activated carbon or ion exchange resin is used as a washing solution.

FIG. 2 is a process flow diagram showing an example of performing liquid processing using a plurality of liquid processing apparatuses 10 shown in FIG. In this example, source water containing suspended solids (SS), organic matter, chlorine ions, and the like is sequentially passed through three treatment facilities 24, 25, and 26 for treatment, and each treatment facility is provided with the liquid treatment apparatus 10 of the present invention. Multiple units are installed in parallel. For example, activated carbon is used as the liquid processing substance 16 of the liquid processing apparatus 10 in the processing equipment 24, a cation exchange resin is used as the liquid processing substance 16 of the liquid processing apparatus 10 in the processing equipment 25, and the liquid processing apparatus 10 in the processing equipment 26 is used.
An anion exchange resin is used as the liquid treatment substance 16 of the above. Then, the source water from the water receiving tank 27 is first supplied to the processing equipment 24 through a pipe 28, and the liquid processing apparatus 10
The above suspended substances (SS) are removed by filtration, and organic substances and chloride ions are adsorbed and removed to some extent by activated carbon.

Next, the liquid processed by the processing equipment 24 is transferred to the processing equipment 25 by a pipe 28 and a pump 29, where the solids remaining without being removed by the processing equipment 24 or solids mixed in the middle are removed. The liquid is further removed by filtration in the liquid processing apparatus 10, and then the ammonium ions and the like remaining in the cation exchange resin are removed by ion exchange. Next, the liquid processed by the processing equipment 25 is transferred to the processing equipment 26 by the pipe 30 and the pump 31, where the processing equipment 25
The solids remaining without being removed by the above or solids mixed in the middle are further removed by filtration in the liquid treatment apparatus 10, and then sulfate ions, chloride ions and the like are removed by ion exchange with an anion exchange resin. Next, the liquid treated by the treatment facility 25 is transferred to a treated water storage facility (not shown) by the pipe 32 and the pump 33. In addition, after the processing equipment 25, a final processing equipment equipped with a liquid processing apparatus 10 in which a cation exchange resin and an anion exchange resin are mixed may be provided.

When the equipment shown in FIG. 2 is operated for a long period of time, solids gradually accumulate in each liquid treatment apparatus 10 and become clogged, thereby increasing resistance to flow. It is desirable to remove the clog. In this example, the back washing is configured so that the three processing facilities 24, 25, and 26 can perform the back washing independently of each other. Note that the supply of the source water from the water receiving tank 27 is stopped before the back washing. To perform back washing of the liquid processing apparatus 10 in the processing equipment 24, the switching valve 34 provided in the pipe 28 is switched, and the activated carbon regenerating solution from the chemical solution tank 35 is supplied to the liquid processing apparatus 10 by the pipe 36 and the pump 37. Processing equipment 25
In order to perform back washing of the liquid processing apparatus 10 in
The switching valve 38 provided at 0 is switched, and a cation exchange resin regenerating solution, for example, a sulfuric acid aqueous solution from a chemical solution tank 39 is supplied to the liquid processing apparatus 10 by a pipe 40 and a pump 41. In order to perform back washing of the liquid processing apparatus 10 in the processing equipment 26, the switching valve 42 provided in the pipe 32 is switched, and
An anion exchange resin regenerating liquid, for example, an aqueous sodium hydroxide solution from 3 is supplied to the liquid processing apparatus 10 by a pipe 44 and a pump 45.

[0015]

As described above, the liquid processing apparatus of the present invention
A linear body provided with a projection on its surface is wound into a coil to form a cylindrical body, and a plurality of gaps are formed in the peripheral wall of the cylindrical body by the projections. Characterized in that it is provided with a liquid treatment substance. When liquid treatment is performed using this device, a primary treatment in which minute suspended substances (SS) suspended in the liquid are filtered by a filter, and the primary-treated liquid is contained in direct contact with the liquid treatment substance. Secondary treatment for removing substances to be treated such as impurities by adsorption or the like can be performed almost simultaneously in the same apparatus. Therefore, the installation area of the apparatus can be reduced and the operation can be simplified, and the processing can be performed quickly and efficiently. Further, before the liquid comes into contact with the liquid processing substance, solids or the like that degrade the processing performance of the liquid processing substance are removed by the filter, so that the life of the liquid processing substance can be extended.

Further, in the liquid treatment method of the present invention, the liquid to be treated is introduced into the cylinder from the periphery of the filter to remove solids in the liquid, and then introduced into the cylinder using the liquid treatment apparatus. And treating the treated liquid by bringing the liquid into direct contact with the liquid treatment substance. According to this method, liquid processing can be performed quickly and efficiently.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid processing apparatus of the present invention.

FIG. 2 is a process flow chart for performing liquid processing using the liquid processing apparatus of FIG. 1;

FIG. 3 is a partial cross-sectional view showing a conventional filter.

FIG. 4 is a longitudinal sectional view of a filtering device using the filtering body of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration body 2 Core metal 3 Top metal fittings 4 Bottom metal fittings 5 Nut 6 Nut 7 Tube plate 8 Filtration aid 10 Liquid treatment device 11 Projection part 12 Cylindrical body 13 Peripheral wall part 14 Gap part 15 Filter body 16 Liquid treatment substance 17 Lower holding member Reference Signs List 18 upper holding member 18a step portion 19 netting 20 opening 20a screw portion 21 through bolt 22 holding nut 23 holding nut 24 processing equipment 25 processing equipment 26 processing equipment 27 water receiving tank 28 pipe 29 pump 30 pipe 31 pump 32 pipe 33 pump 34 Switching valve 35 Chemical tank 36 Piping 37 Pump 38 Switching valve 39 Chemical tank 40 Piping 41 Pump 42 Switching valve 43 Chemical tank 44 Piping 45 Pump

Claims (4)

[Claims] 1. A linear body provided with a projection 11 on its surface is wound in a coil shape to form a cylinder 12, and the projection 11 forms a number of gaps 14 in a peripheral wall 13 of the cylinder 12. A liquid processing apparatus, comprising: a filter body 15 formed as described above; and a liquid processing substance 16 accommodated in a cylindrical body 12 of the filter body 15. 2. The liquid processing apparatus according to claim 1, wherein the liquid processing substance is an ion exchange resin or activated carbon. 3. A liquid treatment apparatus according to claim 1 or 2, wherein a liquid to be treated is introduced into the cylinder 12 from around the filter 15 to remove solids in the liquid. Then, the liquid introduced into the cylinder 12 is treated by bringing the liquid into contact with the liquid treatment substance 16. 4. The liquid processing method according to claim 3, wherein a plurality of liquid processing apparatuses are used, and a liquid to be processed is sequentially passed through each of the liquid processing apparatuses.