KR101335730B1 - Water treatment device and method of installing same - Google Patents

Abstract

The water treatment apparatus 1 of the present invention is a water treatment apparatus for filtering treated water to generate treated water, which is mounted on the transferable base 4 and the base 4 and has the MF membrane unit 7 and the RO membrane unit. The water treatment part 3 which has (8), and the cover part 5 which covers the water treatment part 3 are provided. The primary treated water treated in the MF membrane unit 7 is directly supplied to the RO membrane unit 8 via the RO liquid feed pump 12. The MF membrane unit 7 has means for backwashing the MF membrane module 9 provided in the unit, and a high-pressure air supply pipe 29 for supplying compressed air for air scrubbing to the MF membrane module 9.

Description

WATER TREATMENT DEVICE AND METHOD OF INSTALLING SAME}

The present invention relates to a water treatment apparatus for filtering treated water to generate treated water and a method of installing the same.

BACKGROUND ART A water treatment apparatus for producing treated water using a filtration membrane from raw water (treatment water) such as river water, lake water or ground water has been known in the past. For example, Patent Document 1 discloses a water treatment device equipped with a filtration membrane. In this type of water treatment device, the overall layout, size, etc. are designed according to desired performance, site area, etc., and when the facility is constructed, materials and various parts are transported in the site site, and they are squeezed and completed on site. It is common.

Japanese Patent Publication No. 2003-266071

However, in the conventional water treatment apparatus, a large installation area is required and it cannot be installed, and the compact water treatment apparatus was calculated | required. In addition, since various facilities such as filtration membranes and tanks are stably installed on the ground and need to be piped so as to connect them, the workability in the field is poor, and the time required for construction is long, resulting in a large work load. In addition, when the water treatment apparatus becomes unnecessary, the removal work of the filtration membrane, the tanks, the piping and the like is very difficult, and thus there is a problem that the dismantling work cannot be easily performed.

This invention is made | formed in order to solve such a technical subject, Comprising: It aims at providing the water treatment apparatus which can be installed in a narrow site space, and can perform installation work and removal work in a construction site easily, and its installation method. .

The water treatment apparatus according to the present invention is a water treatment apparatus for filtering treated water to generate treated water, which is mounted on a transportable base and has a electrical conductivity of 250 by a water treatment unit including a filtration membrane module and a reverse osmosis membrane module. When treated water with μS / cm and turbidity of 30 NTU, the electrical conductivity of the treated water was 10 μS / cm or less, and the amount of treated water treated by the water treatment unit was 0.7 m 3 per 1 m 2 of area of the base. When it becomes more than / h, compared with the conventional single phase ion exchange resin tower, it becomes possible to raise the processing capacity of the treated water per unit area significantly. Therefore, when the number of treated water is the same, the apparatus can be made more compact than before. In addition, compared with the conventional water treatment device, the area required for installation is reduced.

In the water treatment apparatus according to the present invention, since the water treatment portion is mounted on the transportable base, the water treatment portion can be assembled in advance and transported to the site. For this reason, the workability at the site can be improved, and the installation work and removal work at the construction site can be easily performed. In this way, as long as the installation work and the dismantling work are easily performed, the water treatment device that becomes unnecessary can be easily used for another site, and the applicability of the water treatment device can be improved. Moreover, it is known conventionally to provide a water treatment apparatus on a conveyable base. However, most of them are temporarily used, such as small scale or temporary construction. In the case of large-scale harbor use, it is common to install some or all of the water treatment devices in a building. However, according to the present invention, it is possible to provide a water treatment apparatus having a base which is transportable and has a high water treatment capacity per area of the base, and which has a small number of carriers and which can be transported on a large scale and permanently without installing a building. .

In the water treatment apparatus according to the present invention, the treated water treated in the filtration membrane module is preferably supplied directly to the reverse osmosis membrane module through a high pressure pump.

Conventionally, the treated water treated in the filtration membrane module is controlled for pressure by being supplied to the reverse osmosis membrane module through an intermediate tank, but an intermediate tank is not interposed between the filtration membrane module and the reverse osmosis membrane module, which is effective for saving space. In addition, compared with the ion exchange resin tower and the like of the prior art, it is easy to make the whole apparatus compact.

In addition, when the water treatment unit is housed in a frame that can be transported, noise can be suppressed from leaking to the outside, and damage to the water treatment unit by ultraviolet rays can be prevented. Moreover, it can aim at the improvement of aesthetics of rainproof measures and an apparatus. In addition, since the water treatment part has a filtration membrane module and a reverse osmosis membrane module, the water quality of the treated water can be improved compared to sand filtration and the like, for example, so that it is easy to maintain stable water quality. In addition, since clogging of the reverse osmosis membrane module can be suppressed by the filtration module, stable operation can be achieved.

In the water treatment apparatus according to the present invention, it is preferable that the water treatment portion includes a back washing means for back washing the filtration membrane module. In this case, by backwashing the filtration membrane module regularly, the life of the filtration membrane module can be improved, and the device can be stably operated for a long time.

In the water treatment apparatus according to the present invention, it is preferable that the water treatment portion includes a high pressure air supply means for supplying compressed air for air scrubbing to the filtration membrane module. In this case, it is possible to improve the life of the filtration membrane module by periodically air-cleaning the filtration membrane module, so that the device can be stably operated for a long time.

In the water treatment apparatus according to the present invention, it is preferable that a working passage is provided in a frame that can be transported. In this case, maintenance during device operation becomes simple.

In the water treatment apparatus according to the present invention, it is preferable that the filtration membrane module is provided in the transferable frame at a filtration membrane module full length / frame height = 90% or less. In this case, since the filtration membrane module can be compactly installed in the frame without bending the header pipe, the size of the entire water treatment apparatus can be made compact. On the other hand, it is preferable that the filtration membrane module is installed in the filtration membrane module full length / frame internal height = 85% or less, and more preferably 80% or less.

In the water treatment apparatus according to the present invention, it is preferable that the filtration membrane module in the transportable frame is provided in parallel in the height direction of the frame, and the reverse osmosis membrane module is installed perpendicular to the height direction of the frame. In this case, it is most suitable for compactness as a method of densely charging the module while securing the working space of the frame.

In the water treatment apparatus according to the present invention, it is preferable to include a valve unit of the filtration membrane module and a valve unit of the reverse osmosis membrane module together in a transferable frame. In this case, it is possible to realize that the filtration membrane module and the reverse osmosis membrane module are directly connected through a high pressure pump within a limited range. Here, the valve unit of the filtration membrane module is, for example, raw water, backwash water, washing water, filtered water, raw water return, air, and drain flow channel switching valves and / or flow control valves for each of the drainage, and an instrument for detecting pressure, flow rate, and temperature. A unit equipped with (計 裝 品). The valve unit of the reverse osmosis membrane module means, for example, a unit provided with flow path switching valves and / or flow rate control valves for raw water, permeated water, concentrated water and washing water, and an instrument for detecting pressure and flow rate.

In the water treatment apparatus according to the present invention, it is preferable to fix the filtration membrane module and / or the reverse osmosis membrane module by using the inner wall of the transferable frame. In this case, it becomes easy to secure a work space, such as exchanging modules and inspecting thread breaks. Here, the said "inner wall" includes the wall, the ceiling, and the floor in the frame which can be conveyed.

A water treatment apparatus according to the present invention is a water treatment apparatus for filtering treated water to generate treated water, comprising a water treatment unit including a filtration membrane module and a reverse osmosis membrane module, and the treated water treated by the filtration membrane module includes a high pressure pump. It is preferred to be supplied directly to the reverse osmosis membrane module. Conventionally, since the treated water treated in the filtration membrane module is controlled under pressure by being supplied to the reverse osmosis membrane module through an intermediate tank, the entire apparatus is enlarged, but the treated water treated in the filtration membrane module is directly reversed through a high pressure pump. When supplied to the permeable membrane module, an intermediate tank or the like is not interposed between the filtration membrane module and the reverse osmosis membrane module, which is effective for saving space, and makes the entire apparatus compact compared to the ion exchange resin tower of the prior art. It's easy to do

In the water treatment apparatus according to the present invention, a feed pump for supplying the water to be treated to the filtration membrane module, filtrate flow rate measuring means for measuring the flow rate of the filtered water of the filtration membrane module, pressure detection means for detecting the suction pressure of the high pressure pump, Permeate flow rate measuring means for measuring the flow rate of the permeate water of the reverse osmosis membrane module, concentrated water amount adjusting means for adjusting the concentrated water amount of the reverse osmosis membrane module, and a control unit for controlling the water treatment unit, the control unit further comprises filtered water It is preferable to respectively control the supply pump based on the measurement result of the flow rate measuring means, the high pressure pump based on the detection result of the pressure detecting means, and the concentrated water amount adjusting means based on the measurement result of the permeate flow rate measuring means. In this case, stable operation of the device can be realized.

In the water treatment apparatus according to the present invention, it is preferable that all of the filtrate of the filtration membrane module is supplied to the reverse osmosis membrane module. In this case, the processing capacity of the treated water can be secured.

A method of installing a water treatment device according to the present invention is characterized in that the water treatment unit including the filtration membrane module and the reverse osmosis membrane module is assembled in advance, and then transported to the construction site and fixedly installed at the construction site. In this way, it becomes possible to shorten the installation time of the water treatment device and to simplify the work in the field, thereby improving the workability in the field.

According to the present invention, it is possible to provide a water treatment apparatus and a method of installing the same, which can easily perform installation work and removal work at a construction site.

1 is a perspective view showing a water treatment device according to a first embodiment.
2 is a cross-sectional view taken along the line II-II in Fig.
3 is a cross-sectional view taken along line III-III of FIG. 1.
4 is a cross-sectional view taken along the line IV-IV in Fig.
It is a schematic diagram for demonstrating the processing flow of the water treatment plant using a water treatment apparatus.
6 is a schematic diagram schematically showing the control of the water treatment unit.
It is a perspective view which shows the state which conveys a water treatment apparatus.
8 is an exploded perspective view showing a water treatment device according to a second embodiment.
It is a perspective view which shows the state which opened the door.
10 is a perspective view showing a water treatment device according to a third embodiment.
11 is a schematic diagram schematically showing the control of the water treatment unit.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, preferred embodiment of the water treatment apparatus which concerns on this invention is described in detail. In addition, in description, the same code | symbol is attached | subjected to the same component, and the overlapping description is abbreviate | omitted.

 (First embodiment)

1 is a perspective view showing a water treatment device according to a first embodiment, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1. In the water treatment apparatus 1 according to the present embodiment, the treated water (for example, industrial water, factory wastewater, river water, etc.) is filtered to generate treated water. The water treatment apparatus 1 includes the container (frame) 2 and the container 2. The water treatment part 3 accommodated is provided.

The container 2 is a box-shaped marine container normally used for cargo transportation, and has a flat base 4 disposed at the bottom of the container 2, and a lid 5 attached to the base 4. It consists of. The base 4 can be conveyed. The door 6 is provided in the end of the cover part 5 in the longitudinal direction. The overall length of the container 2 can adopt each aspect of about 6 m (20 feet) or 12 m (40 feet).

The water treatment unit 3 is mounted on the base 4, and is mainly composed of a microfiltration membrane (hereinafter referred to as MF membrane) unit 7 and a reverse osmosis membrane (hereinafter referred to as RO membrane) unit 8. have. The MF membrane unit 7 is configured by aligning 20 MF membrane modules 9 in ten rows along the longitudinal direction of the container 2. These MF membrane modules 9 are formed in a columnar shape and are installed between the upper and lower header tubes, and each MF membrane module 9 is connected to each of the header tubes on the upstream side and the downstream side through a branch pipe.

The RO membrane unit 8 is comprised by aligning 14 RO membrane modules 10 in 7 rows along the height direction of the container 2. These RO membrane modules 10 are formed in a cylindrical shape and are attached to the mounting table 11 so as to be parallel to the base 4 (see FIGS. 3 and 4). Each RO membrane module 10 is connected to each upstream and downstream header tube. Each MF membrane module 9 of the MF membrane unit 7 and each RO membrane module 10 of the RO membrane unit 8 are directly communicated with each other by a pipe 14.

Inside the container 2, a RO liquid feed pump 12 for supplying the treated water to the RO membrane unit 8 and a backwashing chamber (backwashing means) for supplying a backwashing liquid to the MF membrane unit 7 ( 13) is provided. The RO feed pump (high pressure pump) 12 is disposed in the middle of the pipe 14, and supplies the first treated water treated by the MF membrane unit 7 directly to the RO membrane unit 8 at a high pressure.

The backwash chamber 13 is disposed above the pipe 14 and communicates with the pipe 14. Therefore, a part of the primary treated water processed by the MF membrane unit 7 and flowing through the pipe 14 flows into the backwash chamber 13 and is stored. The primary treated water stored in the backwash chamber 13 is used for backwashing the MF membrane unit 7. Moreover, the operation panel 15 which controls the water treatment apparatus 1 is arrange | positioned between the backwash chamber 13 and the MF membrane unit 7 below the piping 14.

On the side of the door 6 of the container 2, the NaOH reservoir 16, the anti-scaling reservoir 17, the SBS reservoir 18 and the NaClO reservoir (backwashing means) 19 are aligned. Corresponding liquid feeding pumps 20, 21, 22, 23 are connected to these reservoirs, respectively. The NaOH reservoir 16, the scale inhibitor reservoir 17, the SBS reservoir 18, and the NaClO reservoir 19 are hypothesized by the support 24. Inside the support 24, an MF feed pump 25 for supplying the water to be treated to the MF membrane unit 7 is disposed.

Hereinafter, the process flow of the water treatment plant using the water treatment apparatus 1 is demonstrated, referring FIG. It is a schematic diagram for demonstrating the processing flow of the water treatment plant using a water treatment apparatus. In FIG. 5, the area | region enclosed by the dashed-two dotted line is the water treatment apparatus 1 which concerns on this embodiment.

As shown in FIG. 5, in the water treatment apparatus 1 according to the present embodiment, the MF membrane unit 7 and the RO membrane unit 8 are directly connected by the pipe 14 without interposing an intermediate tank or the like. Connected. The primary treated water treated by the MF membrane unit 7 is directly supplied to the RO membrane unit 8 by the RO liquid feed pump 12.

The NaClO storage tank 19 communicates with the pipe 14 via a supply pipe (backwashing means) 26. The NaClO solution stored in this NaClO storage tank 19 is used when backwashing the MF membrane module 9. In addition, a reducing agent storage tank 18 such as SBS (sodium bisulfite) is connected to the pipe 14 through the supply pipe 27, and the scale inhibitor storage tank 17 is connected to the pipe 14 through the supply pipe 28. . SBS and anti-scaling agents stored in these reservoirs are used to clean the RO membrane module 10. The washing wastewater of the RO membrane module 10 is discharged to the outside together with the backwash wastewater of the MF membrane module 9.

The high pressure air supply pipe (high pressure air supply means) 29 communicates with the bottom of the MF membrane unit 7. This high pressure air supply pipe 29 supplies compressed air for air scrubbing to the MF membrane module 9. The high pressure air supply pipe (backwashing means) 30 communicates with the upper end of the backwashing chamber 13. The high pressure air supply pipe 30 supplies high pressure air to the backwash chamber 13 when backwashing the MF membrane module 9, thereby storing the first treated water stored in the backwash chamber 13. It has a function of extruding to the membrane module 9 side.

As shown in FIG. 5, as a facility regarding the pretreatment of the water treatment apparatus 1, there are a raw water tank 31, the activated carbon pretreatment tower 32, and the storage tank 33. As shown in FIG. The raw water tank 31 is a tank for temporarily storing raw water (treatment water) such as industrial water, factory wastewater or river water. The raw water tank 31 sediments and separates particles in raw water. The raw water after the sedimentation separation is further removed from the activated carbon pretreatment column 32 to form pretreatment water (treatment water) and stored in the storage tank 33. The pretreated water in the storage tank 33 is supplied to the MF membrane unit 7 by the MF liquid feeding pump 25.

On the other hand, as a facility regarding the post-treatment of the water treatment apparatus 1, there are a storage tank 34, an ion exchange resin tower 35, and a pure water tank 36. The secondary treated water treated by the RO membrane unit 8 is temporarily stored in the storage tank 34 and flows into the pure water tank 36 after ion exchange in the ion exchange resin tower 35.

6 is a schematic diagram schematically showing the control of the water treatment unit. As shown in FIG. 6, between the MF membrane unit 7 and the RO liquid feed pump 12, a flow meter 48 for measuring the flow rate of the first treated water flowing in the pipe 14, and the first difference. The pressure sensor 49 which detects the pressure of process water is provided. The flowmeter 48 and the pressure sensor 49 are connected to the control CPU (Central Processing Unit) 52 provided in the operation panel 15, and transmit the measured data to the control CPU 52.

Moreover, between the RO membrane unit 8 and the storage tank 34, the flowmeter 50 which measures the flow volume of the 2nd process water flowing from the RO membrane unit 8, and the control valve which adjusts the flow volume ( 51). The flowmeter 50 is connected to the control CPU 52 and transmits the measured data to the control CPU 52. The MF feed pump 25, the RO feed pump 12 and the regulating valve 51 are connected to the control CPU 52, respectively, and receive control signals from the control CPU 52 to execute respective operations.

The control CPU 52 controls the flow rate of the MF liquid feed pump 25 based on the data measured by the flowmeter 48, and the RO liquid feed pump based on the data detected by the pressure sensor 49. The RO feed pump 12 is controlled so that the suction side of (12) becomes positive (+). The control CPU 52 also controls the control valve 51 so that the flow rate of the second treated water is constant based on the data measured by the flowmeter 50.

In the water treatment apparatus 1 configured in this manner, the water to be treated before being processed by the water treatment unit 3 (that is, the MF liquid feeding pump 25 is supplied to each MF membrane module 9 of the MF membrane unit 7). When the electrical conductivity of the pretreated water] is 250 µS / cm and the turbidity is 30 NTU, the treated water (that is, each RO membrane module 10 of the RO membrane unit 8) treated by the water treatment unit 3 Secondary treated water after filtration by 10 µS / cm or less. And the quantity of the processed water processed by the water treatment part 3 is 0.7 m <3> / h or more per 1 m <2> of areas of the base 4, Preferably it is 1.4 m <3> / h or more. For example, 5.0 m <3> / h or less is preferable and 4.0 m <3> / h or less is more preferable on the basis of workability on the transportable base 4 and ease of maintenance.

This makes it possible to significantly increase the treatment capacity of the treated water per unit area as compared with the conventional single-phase ion exchange resin tower. Therefore, when the quantity of treated water is the same, an apparatus can be made compact compared with the former. In addition, since the MF membrane module 9 and the RO membrane module 10 can be mounted densely on the base 4 as compared with the conventional single-phase ion exchange resin tower, even in a narrow site that has not been conventionally installed. The water treatment apparatus 1 can be provided.

In addition, the processing capability of the water treatment part 3 which concerns on this embodiment, etc. are not limited to said numerical value. For example, the electric conductivity of the treated water is changed by the variation of the electrical conductivity of the water to be treated. However, according to the water treatment unit 3 according to the present embodiment, even if the conductivity of the water to be treated varies, a treated water having stable electrical conductivity can be obtained, for example, stably even if the raw water is changed to 100 to 1000 µS / cm. Low pure water of up to 50 μS / cm and more than 0.5 m 3 / h can be produced.

According to the water treatment apparatus 1 according to the present embodiment, since the water treatment unit 3 is mounted on the transferable base 4, as shown in FIG. 7, after the water treatment unit 3 is assembled at the factory, It can be conveyed to the site by conveyance means, such as track T, and can be fixedly installed in a construction site. For this reason, it becomes possible to shorten the installation time of the water treatment apparatus 1 and to simplify the work in the field, to improve the workability in the field, and to easily perform the installation work in the construction site. have. In addition, the demolition work of the water treatment device 1 can also be facilitated. As such, as long as the installation work and the dismantling work are easily performed, the unnecessary water treatment device 1 can be easily used at another site, and the applicability of the water treatment device 1 can be improved.

Moreover, it is known conventionally to provide a water treatment apparatus on a conveyable base. However, most of them are temporarily used, such as small scale or temporary construction. In the case of large-scale harbor use, it is common to install some or all of the water treatment devices in a building. However, according to the water treatment device 1 according to the present embodiment, since the water can be transported and the water treatment capacity per area of the base 4 is high, the number of carriers is small and the base can be transported large-scale and permanently without installing a building. It is possible to provide a water treatment device equipped with.

In addition, since the water treatment part 3 mounted on the base 4 is covered by the lid part 5, noise can be prevented from leaking to the outside, and damage to the water treatment part 3 by ultraviolet rays can be prevented. Can be. In addition, it is possible to improve the countermeasure of the rainstorm and the aesthetics of the device.

In addition, since the water treatment unit 3 includes the MF membrane module 9 and the RO membrane module 10, the water quality of the treated water can be improved compared to sand filtration and the like, for example, so that it is easy to maintain stable water quality. . In addition, since clogging of the RO membrane module 10 can be suppressed by the MF membrane module 9, it becomes possible to achieve stable operation.

In addition, since the treated water processed by the MF membrane module 9 is directly supplied to the RO membrane module 10 through the RO feed pump 12, the MF membrane module 9 and the RO membrane module 10 are conventionally used. Compared to the type in which the intermediate tank is installed between the two and the intermediate tank, eliminating the intermediate tank is effective for saving the space and makes it easier to compact the entire apparatus.

In addition, backwashing means comprising a backwash chamber 13 for backwashing the MF membrane module 9, a high pressure air supply pipe 30, a NaClO reservoir 19, and the like, and compression for air scrubbing to the MF membrane module 9 Since the high pressure air supply pipe 29 which supplies air is provided, the life of the MF membrane module 9 can be improved by backwashing or air-cleaning the MF membrane module 9 regularly, so that the water treatment apparatus 1 It becomes possible to operate stably for a long time.

(Second Embodiment)

Hereinafter, 2nd Embodiment is described with reference to FIG. The water treatment apparatus 37 according to the present embodiment differs from the first embodiment in that the lid portion 40 of the container (frame) 38 is detachably attached to the base 39. Since other structures and the like are the same as those in the first embodiment, redundant descriptions are omitted.

Specifically, the box-shaped container 38 is different from the container 2 normally used for cargo transportation, and the base 39 which can be conveyed and the lid part 40 which are detachably attached to the base 39 are attached. Consists of The base 39 is formed in a rectangle, and the four corners are provided with protrusions 44 which protrude outward from the main body of the base 39. In the center of these protrusions 44, through holes 46 extending in the plate thickness direction of the protrusions 44 are formed, respectively.

The lid portion 40 has a housing 41 surrounding the water treatment portion 3 and a door (movable wall portion) 42 capable of opening and closing the opening formed in the side wall of the housing 41. At the four corners of the lid portion 40, protrusions 43 protruding outward from the housing 41 are provided, respectively. The positions of these protrusions 43 correspond to the protrusions 44 of the base 39, respectively. In the center of the protrusion 43, a through hole 47 corresponding to the through hole 46 of the protrusion 44 is formed, respectively.

When manufacturing the water treatment apparatus 37, first, parts such as the MF membrane unit 7 and the RO membrane unit 8 are assembled on the base 39 to assemble the water treatment part 3. After assembling the water treatment part 3, the cover part 40 is put on the water treatment part 3, and after aligning the through hole 47 of the protrusion part 43 and the through hole 46 of the protrusion part 44, The bolts 45 are inserted into the through holes 46 and 47 to fix the base 39 and the cover part 40 with the bolts 45.

The water treatment apparatus 37 according to the present embodiment can obtain the same operational effects as the water treatment apparatus 1 according to the first embodiment, and after the water treatment unit 3 is assembled on the base 39, The water treatment apparatus 37 can be manufactured easily by covering the cover part 40 to the processing part 3 and attaching the cover part 40 to the base 39. Moreover, since the lid part 40 is detachably attached to the base 39, these operations are removed by removing the lid part 40, for example, when carrying out maintenance of the whole water treatment part 3, or when replacing parts. It can be done easily. In addition, when the water treatment apparatus 37 becomes unnecessary, the bolt 45 is detached and the cover portion 40 is easily detached from the base 39 to facilitate the disassembly or dismantling of the water treatment portion 3. Can be done.

Moreover, since the door 42 is formed in the side wall of the housing 41, when checking or replacing the MF film module 9 installed in the MF film unit 7, for example, as shown in FIG. By opening (42), an operator or the like can easily enter the container 38, so that the inspection work and the replacement work of the MF membrane module 9 can be easily performed. As a result, the maintenance property of the water treatment apparatus 1 can be improved.

(Third Embodiment)

Hereinafter, a third embodiment will be described with reference to FIG. 10. The water treatment apparatus 53 according to the present embodiment is different from the first embodiment in that the water treatment apparatus 53 is mounted on the movable base 54 without being housed inside the container. Since other structures and the like are the same as those in the first embodiment, redundant description is omitted.

That is, the water treatment apparatus 53 is provided with the water treatment part 3, and is mounted in the base 54 of flat form. The water treatment unit 3 is mainly composed of the MF membrane unit 7 and the RO membrane unit 8. The primary treated water treated by the MF membrane unit 7 is directly supplied to the RO membrane unit 8 by the RO liquid feed pump 12.

Conventionally, since the treated water treated by the filtration membrane module is controlled by supplying the reverse osmosis membrane module through an intermediate tank, the entire apparatus is enlarged. However, in the water treatment apparatus 53 according to the present embodiment, the MF membrane is used. When the first treatment water treated in the unit 7 is supplied to the RO membrane unit 8 directly through the RO feed pump 12, an intermediate portion between the MF membrane unit 7 and the RO membrane unit 8 is provided. Since a tank or the like is not interposed, it is effective for saving space, and it is easy to achieve compactness of the entire apparatus as compared with the ion exchange resin tower of the prior art.

11 is a schematic diagram schematically showing the control of the water treatment unit. As shown in FIG. 11, between the MF membrane unit 7 and the RO liquid feed pump 12, a flow meter (filtration water flow measuring means) 48 for measuring the flow rate of the primary treated water flowing in the pipe 14. And a pressure sensor (pressure detection means) 49 for detecting the pressure at the suction side of the RO liquid feed pump 12 is provided. The flowmeter 48 and the pressure sensor 49 are connected to the control CPU 52 provided in the operation panel 15, and transmit the measured data to the control CPU 52.

Further, behind the RO membrane unit 8, an RO permeate flow meter (permeate flow rate measuring means) 56 for measuring the flow rate of the permeate water (secondary treated water) flowing from the RO membrane unit 8 is provided. It is. In addition, the RO membrane unit 8 is directly connected with an RO concentration amount control valve (concentration amount adjusting means) 55 for adjusting the RO concentration amount. The RO permeate flowmeter 56 is connected to the control CPU 52 and transmits the measured data to the control CPU 52. The MF feed pump 25, the RO feed pump 12, and the RO concentrated water amount regulating valve 55 are connected to the control CPU 52, respectively, and receive control signals from the control CPU 52 to execute respective operations. .

In the water treatment apparatus 53 configured as described above, MF-RO direct control such as flow control, pressure control, and flow control is performed. Specifically, first, the flow meter 48 measures the flow rate of the MF filtered water (primary treated water), and outputs the signal to the control CPU 52. The control CPU 52 performs PID (Proportional Integral Derivative) calculation based on the data measured by the flowmeter 48, and outputs the result. On the other hand, as a PID operation, the output operation by the deviation from a setting value is mentioned, for example. Subsequently, the control CPU 52 performs inverter frequency control for the MF liquid feeding pump 25 based on the output of the PID operation. Thereby, motor rotation speed control of the MF liquid feeding pump 25 is performed, and the supply amount to the MF membrane unit 7 is fluctuated.

The pressure sensor 49 detects the pressure at the suction side of the RO liquid feed pump 12, and outputs the pressure signal to the control CPU 52. The control CPU 52 performs PID calculation based on the pressure signal on the suction side of the RO liquid feed pump 12, and outputs the result. Subsequently, the control CPU 52 performs inverter frequency control for the RO liquid feed pump 12 based on the output of the PID operation. Thereby, motor rotation speed control of the RO liquid feed pump 12 is performed, and the discharge amount of the RO liquid feed pump 12 changes.

The RO permeate flowmeter 56 measures the RO permeate flow rate and outputs the measurement signal to the control CPU 52. The control CPU 52 performs a PID calculation based on the RO permeate flow rate signal and outputs the result. Subsequently, the control CPU 52 controls the RO concentrated water amount control valve 55 based on the output of the PID operation. Therefore, the RO concentration is fluctuated. As a result, the RO permeation amount is varied.

For example, when the set value of the MF filtered water amount is 25 m 3 / h and the set value of the suction pressure of the RO feed pump 12 is 5 m, the discharge amount of the RO feed pump 12 is 25 m 3 / h. And when the RO permeation amount set value is 20 m 3 / h, the RO concentration is balanced at 5 m 3 / h.

When the suction pressure set value of the RO liquid feed pump 12 is stabilized at 5 m of water column, the pressurized flow rate from the MF membrane unit 7 and the incoming flow rate of the RO liquid feed pump 12 are balanced. In this case, the discharge amount of the RO liquid feed pump 12 is 25 m 3 / h, which is the same as the supply amount to the MF membrane unit 7. Thereafter, the RO concentrated water control valve 55 is operated to divide the RO permeated water amount by 20 m 3 / h and the RO concentrated water amount by 5 m 3 / h.

When the MF membrane differential pressure increases, the rotation speed of the MF liquid feed pump 25 increases to maintain the MF filtered water amount set value 25 m 3 / h, and when the RO membrane differential pressure increases, the RO liquid feed pump 12 rotates. The number rises to maintain the RO permeated water set value 20 m3 / h (RO concentrated water amount 5 m3 / h). Therefore, the suction pressure set value column 5 m (that is, the state where the inflow flow rate and the inflow flow rate of RO feed pump 12 are balanced) of RO feed pump 12 continue to stabilize. Thereby, stable operation of the water treatment apparatus 53 can be realized.

Embodiment mentioned above demonstrated an example of the water treatment apparatus which concerns on this invention, and the water treatment apparatus which concerns on this invention is not limited to what was described in embodiment. The water treatment apparatus according to the present invention may be modified or applied to the water treatment apparatus according to the embodiment so as not to change the gist of each claim.

For example, in the above-described embodiment, the RO membrane unit 8 is formed in a single stage, but if necessary, two stages or three stages may be used in which the concentrated water of the front end or the permeated water of the front end is the raw water. Moreover, although the door 42 was provided as a movable wall part which can open and close the opening formed in the housing 41, you may provide a shutter. In addition to the microfiltration membrane, the filtration membrane is also subjected to an ultrafiltration membrane.

Although an Example demonstrates this invention more concretely below, this invention is not limited to a following example.

(Example 1)

In the present Example, the water treatment apparatus which has a structure similar to 1st Embodiment was prepared, and the quantity of water processed by the water treatment part per 1 m <2> was measured. The size of the container was 20 feet, the installation area of the container was 15 m 2 (6 m × 2.5 m), and the container capacity was 10.5 m 3 / h. As a result of the measurement, the water treated by the water treatment unit per 1 m 2 was 0.7 m 3 / h or more.

(Example 2)

In the present Example, the water treatment apparatus which has a structure similar to 1st Embodiment was prepared, and the quantity of water processed by the water treatment part per 1 m <2> was measured. The size of the container was 20 feet, the installation area of the container was 15 m 2 (6 m x 2.5 m), and the container capacity was 20 m 3 / h. As a result of the measurement, the water treated by the water treatment unit per 1 m 2 was 1.3 m 3 / h.

(Example 3)

In the present Example, the water treatment apparatus which has a structure similar to 1st Embodiment was prepared, and the quantity of water processed by the water treatment part per 1 m <2> of bases was measured. The water treatment apparatus according to this example did not include the chemical liquid tank and the chemical liquid pump as compared with Example 2. The size of the container was 20 feet, the number of containers was 3, the installation area of the container was 45 m 2 (6 m x 2.5 m x 3), and the container capacity (RO1 outlet) was 72 m 3 / h. As a result of the measurement, the amount of water treated by the water treatment unit per 1 m 2 was 1.6 m 3 / h.

(Comparative Example)

Moreover, the conventional building type water treatment apparatus was prepared, the quantity processed by the water treatment part per 1 m <2> was measured, and it compared with the water treatment apparatus which concerns on this invention. In the case of the building type, the installation area is large because there is a RO1 supply tank (ie, an intermediate tank) and a backwash pump. The MF filtered water amount was 28.6 m 3 / h, the RO1 supply tank capacity was 28.6 m 3, the residence time in the tank was 60 minutes, the RO1 supply tank diameter was 3.5 m, and the RO1 treatment capacity was 20 m 3 / h. In addition, the installation area of the RO1 supply tank is 16 m 2 (4 m × 4 m), the installation area of the backwash pump is 0.6 m 2 (0.8 m × 0.7 m), and the installation area of the water treatment device is 15 m 2 (6 m × 2.5 m). It was. As a result of the measurement, the water treated by the water treatment unit per 1 m 2 was 0.6 m 3 / h.

In the above description, it was confirmed that the treated water amount per 1 m 2 in the conventional building type is 0.6 m 3 / h, and the treated water amount per 1 m 2 in the water treatment apparatus according to the present invention is 0.7 m 3 / h or more.

1, 37, 53: water treatment device
2, 38: container (frame)
3: water treatment unit
4, 39: base
5, 40: cover part
9: MF membrane module
10: RO membrane module
12: RO liquid feed pump (high pressure pump)
13: backwashing chamber (backwashing means)
19: NaClO reservoir (backwashing means)
25: MF feed pump
26 supply pipe (reverse washing means)
29: high pressure air supply pipe (high pressure air supply means)
30: high pressure air supply pipe (backwashing means)
41: Housing
42: door (movable wall)

Claims (14)

A water treatment apparatus for filtering treated water to generate treated water,
It is provided with a water treatment unit including a filtration membrane module and a reverse osmosis membrane module,
The treated water treated in the filtration membrane module is directly supplied to the reverse osmosis membrane module through a high pressure pump,
The water treatment apparatus includes:
A feed pump for supplying the water to be treated to the filtration membrane module;
Filtrate flow rate measuring means for measuring the flow rate of the filtered water of the filtration membrane module;
Pressure detecting means for detecting suction pressure of the high pressure pump;
Permeate flow rate measuring means for measuring the flow rate of the permeate water of the reverse osmosis membrane module;
Concentrated water amount adjusting means for adjusting the concentrated water amount of the reverse osmosis membrane module,
Control unit for controlling the water treatment unit
Further comprising:
The controller controls the supply pump based on the measurement result of the filtered water flow rate measurement means, the high pressure pump based on the detection result of the pressure detection means, and the concentrated water amount based on the measurement result of the permeate flow rate measurement means. And a control means for controlling each of the adjusting means using the output of the PID operation. The water treatment unit according to claim 1, wherein the water treatment unit is mounted on a transportable base, and when the water treatment unit treats the treated water having an electrical conductivity of 250 µS / cm and a turbidity of 30 NTU, the electrical conductivity of the treated water is increased. 10 µS / cm or less, and the amount of the treated water treated by the water treatment unit is 0.7 m 3 / h or more per 1 m 2 of area of the base. The water treatment apparatus according to claim 1 or 2, wherein the water treatment unit includes a back washing means for back washing the filtration membrane module. The water treatment apparatus according to claim 1 or 2, wherein the water treatment unit includes high pressure air supply means for supplying compressed air for air scrubbing to the filtration membrane module. The water treatment apparatus according to claim 1 or 2, wherein the water treatment unit is housed in a frame that can be transported. The water treatment apparatus according to claim 5, wherein a work passage is provided in the transferable frame. The water treatment apparatus according to claim 5, wherein, in the conveyable frame, the filtration membrane module is provided at a filtration membrane module total length / frame height = 90% or less. The water treatment apparatus according to claim 5, wherein the filtration membrane module in the transportable frame is disposed in parallel to the height direction of the frame, and the reverse osmosis membrane module is installed perpendicular to the height direction of the frame. The water treatment apparatus according to claim 5, further comprising a valve unit of the filtration membrane module and a valve unit of the reverse osmosis membrane module in the transferable frame. The water treatment apparatus according to claim 5, wherein either or both of the filtration membrane module and the reverse osmosis membrane module are fixed using an inner wall of the transferable frame. The water treatment apparatus according to claim 1 or 2, wherein the PID operation is an output operation based on a deviation from a set value. delete The water treatment apparatus according to claim 1 or 2, wherein all the filtrate of the filtration membrane module is supplied to the reverse osmosis membrane module. After assembling the water treatment apparatus according to claim 1 or 2 in advance, the water treatment apparatus is conveyed to the construction site and fixedly installed at the construction site.

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