JP5562871B2 - Water treatment apparatus and installation method thereof - Google Patents

Description

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

  2. Description of the Related Art Conventionally, water treatment apparatuses that generate treated water from raw water (treated water) such as river water, lake water, or groundwater using a filtration membrane are known. For example, Patent Document 1 discloses a water treatment apparatus including a filtration membrane. In this type of water treatment equipment, the overall layout and standards are designed according to the target performance and site area, and when constructing the facility, materials and various parts are brought into the site site, It is common to assemble and complete them on site.

JP 2003-266071 A

  However, the conventional water treatment apparatus requires a large installation area and cannot be installed, and a compact water treatment apparatus has been required. In addition, it is necessary to install various facilities such as filtration membranes and tanks stably on the ground, and to perform piping to connect them. Is big. In addition, when the water treatment apparatus is not required, it is difficult to remove the filtration membrane, tanks, pipes, and the like, so that there is a problem that the removal work cannot be easily performed.

  The present invention has been made to solve such a technical problem, and can be installed even in a narrow site space, and can easily perform installation work and removal work at a construction site, and an installation method thereof. The purpose is to provide.

A water treatment apparatus according to the present invention is a water treatment apparatus for producing treated water by filtering water to be treated, which is mounted on a transportable base and includes a filtration membrane module and a reverse osmosis membrane module. When the water to be treated having an electric conductivity of 250 μS / cm and a turbidity of 30 NTU is treated by the treatment unit, the electric conductivity of the treated water is 10 μS / cm or less, and the treated water treated by the water treatment unit The amount of water is 0.7 m ³ / h or more per 1 m ^{2 of} the base area, so that the treatment capacity of treated water per unit area can be greatly increased compared to conventional single-bed ion exchange resin towers. It becomes. Therefore, when the amount of treated water is the same, the apparatus can be made more compact than before. In addition, the area required for installation is smaller than that of the conventional water treatment apparatus.

  In the water treatment apparatus according to the present invention, since the water treatment unit is mounted on the transportable base, the water treatment unit can be assembled in advance and transported to the site. For this reason, workability on site can be improved, and installation work and removal work on the construction site can be easily performed. Thus, as long as the installation work and the removal work are easily performed, the unnecessary water treatment apparatus can be easily diverted to another site, and the applicability of the water treatment apparatus can be enhanced. In addition, it is known to install a water treatment device on a base that can be transported. However, many of them are used on a temporary basis, such as small-scale or temporary, and in large-scale and permanent use, it is common to install some or all of the water treatment equipment in a normal building. It was. However, according to the present invention, since the water treatment capacity per base area is high while being transportable, the number of transport bodies is small, and a large and permanent transportable base is provided without installing a building. Water treatment equipment can be provided.

Further, in the water treatment apparatus according to the present invention, all of the treated filtrate in the filtration membrane module to handle all of the treated water supplied, is supplied to the reverse osmosis membrane module directly via a high-pressure pump .
Conventionally, the pressure of the treated water treated by the filtration membrane module is supplied to the reverse osmosis membrane module via the intermediate tank, but the intermediate tank or the like is interposed between the filtration membrane module and the reverse osmosis membrane module. Is effective in space saving, and it is easy to make the entire apparatus more compact than a conventional ion exchange resin tower or the like.
Furthermore, the present invention provides a supply pump for supplying water to be treated to the filtration membrane module, and a filtrate flow rate measuring means that is provided between the filtration membrane module and the high-pressure pump and measures the flow rate of the filtrate of the filtration membrane module. A pressure detection means for detecting the suction pressure of the high-pressure pump, and a control section for controlling the water treatment section, the control section controls the supply pump based on the measurement result of the filtered water flow measurement means, and It is preferable to control the high pressure pump so that the suction pressure of the high pressure pump becomes positive based on the detection result of the pressure detection means.

  Furthermore, when the water treatment unit is housed in a transportable frame, leakage of noise to the outside can be suppressed and damage to the water treatment unit due to ultraviolet rays can be prevented. In addition, wind and rain countermeasures and improvement in the aesthetics of the device can be achieved. Furthermore, since the water treatment unit has a filtration membrane module and a reverse osmosis membrane module, the quality of the treated water can be improved as compared with, for example, sand filtration, and it becomes easy to maintain stable water quality. Moreover, since the 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 unit includes backwashing means for backwashing the filtration membrane module. In this case, it is possible to improve the life of the filtration membrane module by regularly backwashing the filtration membrane module, and to operate the apparatus stably for a long period of time.

  In the water treatment apparatus according to the present invention, it is preferable that the water treatment unit includes 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 washing the filtration membrane module with air, and to operate the apparatus stably for a long time.

  In the water treatment apparatus according to the present invention, it is preferable that a work path is provided in the transportable frame. In this case, maintenance during operation of the apparatus is simplified.

  In the water treatment apparatus according to the present invention, it is preferable that the filtration membrane module is installed in the transportable frame so that the total length of the filtration membrane module / the height inside the frame = 90% or less. In this case, since the filtration membrane module can be compactly installed in the frame without bending the header pipe, the overall size of the water treatment apparatus can be made compact. In addition, it is preferable that a filtration membrane module is installed with a filtration membrane module full length / frame internal height = 85% or less, and it is more preferable to install with 80% or less.

  In the water treatment apparatus according to the present invention, it is preferable to install the filtration membrane module in the transportable frame body in parallel to the height direction of the frame body, and to install the reverse osmosis membrane module perpendicular to the height direction of the frame body. It is. In this case, it is most suitable for downsizing as a method of densely filling the module while securing the work space of the frame.

  In the water treatment apparatus according to the present invention, it is preferable that both the valve unit of the filtration membrane module and the valve unit of the reverse osmosis membrane module are provided in a transportable frame. In this case, the filtration membrane module and the reverse osmosis membrane module can be directly connected via the high-pressure pump within a limited range. Here, the valve unit of the membrane filter module is, for example, raw water, backwash water, wash water, filtered water, raw water return, air, drainage flow path switching valve and / or flow control valve, pressure, flow rate, A unit with instrumentation that detects temperature. The valve unit of the reverse osmosis membrane module is, for example, a unit including a flow path switching valve and / or a flow rate control valve for each of raw water, permeated water, concentrated water, and washing water, and an instrument that detects pressure and flow rate. say.

  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 using the inner wall of the transportable frame. In this case, it is easy to secure a work space for module replacement, yarn breakage inspection, and the like. Here, the “inner wall” includes a wall, ceiling, and floor inside the frame that can be transported.

A water treatment apparatus according to the present invention is a water treatment apparatus that filters treated water to generate treated water, and includes a water treatment unit including a filtration membrane module and a reverse osmosis membrane module, and the supplied treated treatment All of the treated water treated by the filtration membrane module that treats all of the water is supplied directly to the reverse osmosis membrane module via a high-pressure pump . Conventionally, the pressure of the treated water treated by the filtration membrane module is supplied to the reverse osmosis membrane module via the intermediate tank, so that the entire apparatus becomes large, but the treated water is treated by the filtration membrane module. When the treated water is supplied directly to the reverse osmosis membrane module via the high pressure pump, there is no intermediate tank between the filtration membrane module and the reverse osmosis membrane module, which is effective for space saving, Compared to a conventional ion exchange resin tower or the like, it is easy to make the entire apparatus more compact.

In the water treatment apparatus according to the present invention, a filtered water flow rate is provided between a supply pump that supplies treated water to the filtration membrane module, and between the filtration membrane module and the high-pressure pump, and measures the flow rate of filtrate water in the filtration membrane module A measuring means; a pressure detecting means for detecting the suction pressure of the high-pressure pump; and a control section for controlling the water treatment section. The control section controls the supply pump based on the measurement result of the filtered water flow measuring means. And the high pressure pump is controlled based on the detection result of the pressure detection means . The control unit includes a permeated water flow rate measuring unit that measures the flow rate of the permeated water of the reverse osmosis membrane module, and a concentrated water amount adjusting unit that adjusts the amount of concentrated water of the reverse osmosis membrane module. It is preferable to control the supply pump based on the measurement result, the high-pressure pump based on the detection result of the pressure detection means, and the concentrated water amount adjusting means based on the measurement result of the permeate flow rate measurement means. In this case, stable operation of the apparatus can be realized.

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

  The method for installing a water treatment apparatus according to the present invention is characterized in that after a water treatment unit including a filtration membrane module and a reverse osmosis membrane module is assembled in advance, it is transported to a construction site and installed at the construction site. If it does in this way, it will become possible to shorten the installation time of a water treatment apparatus, and to simplify the operation | work in a field, and can improve the construction property in a field.

  ADVANTAGE OF THE INVENTION According to this invention, the water treatment apparatus which can perform the installation work and removal work in a construction site easily, and its installation method can be provided.

It is a perspective view which shows the water treatment apparatus which concerns on 1st Embodiment. It is sectional drawing which follows the II-II line | wire of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is a schematic diagram for demonstrating the processing flow of the water treatment plant | facility using a water treatment apparatus. It is a schematic diagram which shows control of a water treatment part. It is a perspective view which shows the state which conveys a water treatment apparatus. It is a disassembled perspective view which shows the water treatment apparatus which concerns on 2nd Embodiment. It is a perspective view which shows the state which opened the door. It is a perspective view which shows the water treatment apparatus which concerns on 3rd Embodiment. It is a schematic diagram which shows control of a water treatment part.

  Hereinafter, a preferred embodiment of a water treatment apparatus according to the present invention will be described in detail with reference to the drawings. In the description, the same components are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
1 is a perspective view showing a water treatment apparatus according to the first embodiment, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. The water treatment apparatus 1 according to the present embodiment generates treated water by filtering water to be treated (for example, industrial water, factory waste water, river water, etc.), and includes a container (frame body) 2 and a container 2. The water treatment part 3 accommodated in the inside is provided.

  The container 2 is a box-shaped marine container that is usually used for freight transportation, and includes a flat plate-like base 4 disposed at the bottom of the container 2 and a lid portion 5 attached to the base 4. The base 4 can be transported. A door 6 is provided at one end in the longitudinal direction of the lid 5. Each length of the container 2 can be about 6 m (20 feet) or 12 m (40 feet).

  The water treatment unit 3 is mounted on a base 4 and mainly includes a microfiltration membrane (hereinafter referred to as MF membrane) unit 7 and a reverse osmosis membrane (hereinafter referred to as RO membrane) unit 8. The MF membrane unit 7 is configured by aligning 20 MF membrane modules 9 in 10 rows along the longitudinal direction of the container 2. These MF membrane modules 9 are formed in a cylindrical shape and are erected between upper and lower header pipes. Each MF membrane module 9 is connected to each upstream and downstream header pipe via a branch pipe. Has been.

  The RO membrane unit 8 is configured by aligning 14 RO membrane modules 10 in seven rows along the height direction of the container 2. These RO membrane modules 10 are formed in a cylindrical shape, and are attached to a mounting base 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 pipe. Each MF membrane module 9 of the MF membrane unit 7 and each RO membrane module 10 of the RO membrane unit 8 are in direct communication with each other by a pipe 14.

  On the back side of the container 2, there are provided an RO liquid feed pump 12 for supplying treated water to the RO membrane unit 8, and a backwash chamber (backwash means) 13 for feeding backwash fluid to the MF membrane unit 7. It has been. The RO liquid feed pump (high pressure pump) 12 is disposed in the middle of the pipe 14 and supplies the primary 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 communicated with the pipe 14. Therefore, a part of the primary treated water treated 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 when the MF membrane unit 7 is backwashed. An operation panel 15 for controlling the water treatment apparatus 1 is disposed between the backwash chamber 13 and the MF membrane unit 7 and below the pipe 14.

  On the door 6 side of the container 2, an NaOH storage tank 16, a scale inhibitor storage tank 17, an SBS storage tank 18, and a NaClO storage tank (back washing means) 19 are arranged. Corresponding liquid feed pumps 20, 21, 22, and 23 are connected to these storage tanks, respectively. The NaOH storage tank 16, the scale inhibitor storage tank 17, the SBS storage tank 18, and the NaClO storage tank 19 are constructed by a support base 24. An MF liquid feed pump 25 for supplying water to be treated to the MF membrane unit 7 is disposed inside the support base 24.

  Hereinafter, the treatment flow of the water treatment facility using the water treatment apparatus 1 will be described with reference to FIG. FIG. 5 is a schematic diagram for explaining a processing flow of a water treatment facility using a water treatment device. In addition, in FIG. 5, the area | region enclosed with 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 a pipe 14 without an intermediate tank or the like. The primary treated water treated by the MF membrane unit 7 is directly supplied to the RO membrane unit 8 by the RO liquid feeding pump 12.

  The NaClO storage tank 19 is communicated with the pipe 14 via a supply pipe (back washing means) 26. The NaClO solution stored in the NaClO storage tank 19 is used when the MF membrane module 9 is back-washed. Further, a reducing agent storage tank 18 such as SBS (sodium bisulfite) is connected to the pipe 14 via a supply pipe 27, and the scale inhibitor storage tank 17 is connected to the pipe 14 via a supply pipe 28. The SBS and scale inhibitor stored in these storage tanks are used when the RO membrane module 10 is cleaned. The cleaning wastewater from the RO membrane module 10 is discharged to the outside together with the backwash wastewater from the MF membrane module 9.

  A high-pressure air supply pipe (high-pressure air supply means) 29 communicates with the bottom of the MF membrane unit 7. The high-pressure air supply pipe 29 supplies compressed air for air scrubbing to the MF membrane module 9. A high-pressure air supply pipe (back washing means) 30 is communicated with the top of the back washing chamber 13. The high-pressure air supply pipe 30 supplies high-pressure air to the backwash chamber 13 when the MF membrane module 9 is backwashed, and the primary treated water stored in the backwash chamber 13 is supplied to the MF membrane module 9 side. It has a function to extrude.

  As shown in FIG. 5, there are a raw water tank 31, an activated carbon pretreatment tower 32, and a storage tank 33 as equipment related to the pretreatment of the water treatment apparatus 1. The raw water tank 31 is a tank for temporarily storing raw water (treated water) such as industrial water, factory waste water, and river water. The raw water tank 31 separates and separates garbage and the like in the raw water. The raw water after the precipitation separation further removes impurities and the like in the activated carbon pretreatment tower 32 to become pretreated water (treated water) and is stored in the storage tank 33. Then, the pretreated water in the storage tank 33 is supplied to the MF membrane unit 7 by the MF liquid feed pump 25.

  On the other hand, there are a storage tank 34, an ion exchange resin tower 35, and a pure water tank 36 as equipment relating to the post-treatment of the water treatment apparatus 1. The second 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.

  FIG. 6 is a schematic diagram illustrating 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 that measures the flow rate of the primary treated water flowing in the pipe 14, and the pressure of the primary treated water And a pressure sensor 49 for detecting. The flow meter 48 and the pressure sensor 49 are connected to a control CPU (Central Processing Unit) 52 installed on the operation panel 15 and transmit each measured data to the control CPU 52.

  Between the RO membrane unit 8 and the storage tank 34, a flow meter 50 for measuring the flow rate of the secondary treated water flowing from the RO membrane unit 8 and an adjustment valve 51 for adjusting the flow rate are provided. Yes. The flow meter 50 is connected to the control CPU 52 and transmits measured data to the control CPU 52. The MF liquid feeding pump 25, the RO liquid feeding pump 12, and the regulating valve 51 are connected to the control CPU 52, respectively, and receive each control signal from the control CPU 52 to execute each operation.

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

In the water treatment apparatus 1 configured as described above, water to be treated before being treated by the water treatment unit 3 (that is, pretreatment supplied to each MF membrane module 9 of the MF membrane unit 7 by the MF liquid feeding pump 25). When the electrical conductivity of water is 250 μS / cm and the turbidity is 30 NTU, the treated water treated by the water treatment unit 3 (that is, after being filtered by each RO membrane module 10 of the RO membrane unit 8) The electrical conductivity of the secondary treated water) is 10 μS / cm or less. The amount of treated water treated by the water treatment unit 3 is 0.7 m ³ / h or more, preferably 1.4 m ³ / h or more per 1 m ² of the area of the base 4. For example, the following is preferably 5.0 m ³ / h from ease of operability and maintenance of the on transportable base 4, more preferably at most 4.0 m ³ / h.

  As a result, the treatment capacity of treated water per unit area can be greatly increased as compared with the conventional single-bed ion exchange resin tower. Therefore, when the amount of treated water is the same, the apparatus can be made more compact than in the past. Moreover, since the MF membrane module 9 and the RO membrane module 10 can be densely mounted on the base 4 as compared with the conventional single-bed type ion exchange resin tower, water can be used even in a narrow site that could not be installed conventionally. The processing apparatus 1 can be installed.

In addition, the processing capacity etc. of the water treatment part 3 which concerns on this embodiment are not limited to said numerical value. For example, the electrical conductivity of the treated water varies depending on the variation in the electrical conductivity of the water to be treated. However, according to the water treatment part 3 which concerns on this embodiment, even if the conductivity of to-be-processed water fluctuates, the treated water which has the stable electrical conductivity can be obtained, for example, raw water is fluctuated with 100-1000 microsiemens / cm. Even in this case, it is possible to stably produce low-purity water of 50 μS / cm or less and 0.5 m ³ / h or more.

According to the water treatment apparatus 1 according to the present embodiment, since the water treatment unit 3 is mounted on the transportable base 4, after assembling the water treatment unit 3 in the factory as shown in FIG. It can be transported to the site by the transport means and installed at the construction site. For this reason, it becomes possible to shorten the installation time of the water treatment apparatus 1 and simplify the work at the site, improve the workability at the site, and easily perform the installation work at the construction site. . Moreover, the removal work of the water treatment apparatus 1 can be easily performed. As described above, since the installation work and the removal work are easily performed, the unnecessary water treatment apparatus 1 can be easily diverted to another site, and the applicability of the water treatment apparatus 1 can be enhanced.
In addition, it is known to install a water treatment device on a base that can be transported. However, many of them are used on a temporary basis, such as small-scale or temporary, and in large-scale and permanent use, it is common to install some or all of the water treatment equipment in a normal building. It was. However, according to the water treatment apparatus 1 according to the present embodiment, since the water treatment capacity per area of the base 4 is high while being transportable, the number of transport bodies is small, and the scale is large without installing a building. A water treatment device having a permanent transportable base can be provided.

  Moreover, since the water treatment part 3 mounted on the base 4 is covered with the lid part 5, it is possible to suppress leakage of noise to the outside and to prevent damage to the water treatment part 3 due to ultraviolet rays. Can do. In addition, wind and rain countermeasures and the aesthetics of the device can be improved.

  Moreover, since the water treatment part 3 has the MF membrane module 9 and the RO membrane module 10, the quality of treated water can be improved as compared with, for example, sand filtration, and it becomes easy to maintain stable water quality. In addition, since the clogging of the RO membrane module 10 can be suppressed by the MF membrane module 9, stable operation can be achieved.

  Furthermore, since the treated water treated by the MF membrane module 9 is directly supplied to the RO membrane module 10 via the RO liquid feed pump 12, between the MF membrane module 9 and the RO membrane module 10 as in the prior art. Compared to the type provided with an intermediate tank, eliminating the intermediate tank is effective for space saving and facilitates downsizing of the entire apparatus.

  Further, backwashing means comprising a backwash chamber 13 for backwashing the MF membrane module 9, a high pressure air supply pipe 30, a NaClO storage tank 19, and the like, and a high pressure air supply pipe for supplying compressed air for air scrubbing to the MF membrane module 9 29, by periodically back-washing or air-cleaning the MF membrane module 9, the life of the MF membrane module 9 can be improved, and the water treatment apparatus 1 can be stably operated for a long time. Become.

(Second Embodiment)
The second embodiment will be described below with reference to FIG. The water treatment apparatus 37 according to the present embodiment is different from the first embodiment in that a lid 40 of a container (frame body) 38 is detachably provided on a base 39. Since other structures and the like are the same as those of the first embodiment, redundant description is omitted.

  Specifically, unlike the container 2 that is normally used for freight transportation, the box-shaped container 38 includes a transportable base 39 and a lid 40 that is detachably attached to the base 39. Yes. The base 39 is formed in a rectangular shape, and overhanging portions 44 projecting outward from the main body of the base 39 are provided at the four corners. Through holes 46 extending in the plate thickness direction of the overhang portions 44 are formed in the centers of the overhang portions 44, respectively.

  The lid 40 includes a housing 41 that surrounds the water treatment unit 3, and a door (movable wall) 42 that can open and close an opening formed in the side wall of the housing 41. At the four corners of the lid portion 40, overhang portions 43 projecting outward from the housing 41 are provided. The positions of these overhang portions 43 correspond to the overhang portions 44 of the base 39, respectively. A through hole 47 corresponding to the through hole 46 of the overhang portion 44 is formed in the center of the overhang portion 43.

  When manufacturing the water treatment device 37, first, components such as the MF membrane unit 7 and the RO membrane unit 8 are installed on the base 39 to assemble the water treatment unit 3. After assembling the water treatment unit 3, the water treatment unit 3 is covered with the lid 40, and the through hole 47 of the overhanging portion 43 and the through hole 46 of the overhanging portion 44 are aligned, and then the through hole 46. , 47 and the bolts 45 are inserted, and the base 39 and the lid 40 are fixed with the bolts 45.

  The water treatment device 37 according to the present embodiment can obtain the same functions and effects as the water treatment device 1 according to the first embodiment, and after the water treatment unit 3 is assembled on the base 39, the water treatment unit 3 has a lid portion. The water treatment device 37 can be easily manufactured by covering the cover 40 and attaching the lid 40 to the base 39. In addition, since the lid 40 is detachably attached to the base 39, these operations can be easily performed by removing the lid 40, for example, when performing maintenance on the entire water treatment unit 3 or when replacing parts. It can be carried out. Furthermore, when the water treatment device 37 is not required, the lid 40 can be easily removed from the base 39 by removing the bolts 45, whereby the water treatment unit 3 can be easily disassembled or removed.

  Further, since the door 42 is formed on the side wall of the housing 41, for example, when the MF membrane module 9 incorporated in the MF membrane unit 7 is inspected or replaced, the door 42 is opened as shown in FIG. Since an operator or the like can easily enter the container 38, the MF membrane module 9 can be easily inspected and replaced. As a result, the maintainability of the water treatment apparatus 1 can be improved.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to FIG. 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 a movable base 54 without being accommodated inside the container. Since other structures and the like are the same as those of the first embodiment, redundant description is omitted.

  That is, the water treatment device 53 includes the water treatment unit 3 and is mounted on the flat base 54. The water treatment unit 3 is mainly composed of an MF membrane unit 7 and an 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 feeding pump 12.

  Conventionally, pressure control is performed by supplying treated water treated by the filtration membrane module to the reverse osmosis membrane module via the intermediate tank, so that the entire apparatus is enlarged, but according to the present embodiment In the water treatment device 53, when the primary treated water treated by the MF membrane unit 7 is supplied directly to the RO membrane unit 8 via the RO liquid feed pump 12, the MF membrane unit 7 and the RO membrane unit 8 An intermediate tank or the like is not interposed between the two, which is effective for space saving and facilitates downsizing of the entire apparatus as compared with a conventional ion exchange resin tower or the like.

  FIG. 11 is a schematic diagram illustrating 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 (filtered water flow rate measuring means) 48 that measures the flow rate of the primary treated water flowing in the pipe 14, A pressure sensor (pressure detection means) 49 for detecting the pressure on the suction side of the RO liquid pump 12 is provided. The flow meter 48 and the pressure sensor 49 are connected to a control CPU 52 installed on the operation panel 15 and transmit each measured data to the control CPU 52.

  Further, an RO permeate flow meter (permeate flow rate measuring means) 56 that measures the flow rate of the permeate (secondary treated water) flowing from the RO membrane unit 8 is installed behind the RO membrane unit 8. Further, the RO membrane unit 8 is directly connected with an RO concentrated water amount adjusting valve (concentrated water amount adjusting means) 55 for adjusting the RO concentrated water amount. The RO permeate flow meter 56 is connected to the control CPU 52 and transmits the measured data to the control CPU 52. The MF liquid feed pump 25, the RO liquid feed pump 12, and the RO concentrated water amount adjustment valve 55 are connected to the control CPU 52, respectively, and receive the control signal of the control CPU 52 to execute each operation.

  In the water treatment device 53 configured as described above, MF-RO direct connection control such as flow rate control, pressure control, and flow rate control is performed. Specifically, first, the flow meter 48 measures the flow rate of 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 flow meter 48 and outputs the result. In addition, as PID calculation, output calculation is mentioned by the deviation with a setting value, for example. Subsequently, the control CPU 52 performs inverter frequency control for the MF liquid feed pump 25 based on the output of the PID calculation. As a result, the motor rotation speed control of the MF liquid feeding pump 25 is executed, and the supply amount to the MF membrane unit 7 varies.

  The pressure sensor 49 detects the pressure on the suction side of the RO liquid 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 feeding pump 12 based on the output of the PID calculation. Thereby, the motor rotation speed control of the RO liquid feed pump 12 is executed, and the discharge amount of the RO liquid feed pump 12 varies.

  The RO permeate flow meter 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 adjustment valve 55 based on the output of the PID calculation. Therefore, the amount of RO concentrated water varies. Along with this, the RO permeate amount varies.

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 liquid pump 12 is 5 m, the discharge amount of the RO liquid pump 12 is 25 m ³ / h. And when RO permeated-water amount setting value is 20 m < ³ > / h, RO concentrated water amount is balancing at 5 m < ³ > / h.

When the suction pressure set value of the RO liquid pump 12 is stable at the water column 5 m, the pushing flow rate from the MF membrane unit 7 and the drawing flow rate of the RO liquid pump 12 are balanced. In this case, the discharge amount of the RO liquid feeding 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 amount control valve 55 is operated to distribute the RO permeated water amount 20 m ³ / h and the RO concentrated water amount 5 m ³ / h.

And when MF membrane differential pressure becomes large, when the rotation speed of MF liquid feed pump 25 rises and MF filtered water amount setting value 25m < ³ > / h is maintained, RO membrane differential pressure becomes large Then, the rotational speed of the RO liquid feed pump 12 is increased to maintain the RO permeated water amount set value 20 m ³ / h (RO concentrated water amount 5 m ³ / h). Therefore, the suction pressure set value water column 5m of the RO liquid feed pump 12 (that is, the state where the inflow flow rate and the RO flow rate of the RO liquid feed pump 12 are balanced) is continuously stabilized. Thereby, stable operation of the water treatment device 53 can be realized.

  The above-described embodiment describes an example of the water treatment apparatus according to the present invention, and the water treatment apparatus according to the present invention is not limited to the one described in the embodiment. The water treatment apparatus according to the present invention may be modified from the water treatment apparatus according to the embodiment or applied to other ones without changing the gist described in each claim.

  For example, in the above embodiment, the RO membrane unit 8 is a single-stage type, but it may be a two-stage type or a three-stage type using the concentrated water of the previous stage or the permeated water of the previous stage as raw water as necessary. Further, although the door 42 is provided as a movable wall portion that can open and close the opening formed in the housing 41, a shutter may be provided. In addition to the microfiltration membrane, an ultrafiltration membrane is also used as the filtration membrane.

  Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to the following examples.

Example 1
In this example, a water treatment device having the same structure as that of the first embodiment was prepared, and the amount of water treated by the water treatment unit per area of 1 m ² was measured. The container size was 20 feet, the container installation area 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 amount of water treated by the water treatment unit per area of 1 m ² was 0.7 m ³ / h or more.

(Example 2)
In this example, a water treatment device having the same structure as that of the first embodiment was prepared, and the amount of water treated by the water treatment unit per area of 1 m ² was measured. The container size was 20 feet, the container installation area was 15 m ² (6 m × 2.5 m), and the container capacity was 20 m ³ / h. As a result of the measurement, the amount of water treated by the water treatment unit per 1 m ^{2 of} area was 1.3 m ³ / h.

(Example 3)
In this example, a water treatment device having the same structure as that of the first embodiment was prepared, and the amount of water treated by the water treatment unit per 1 m ^{2 of} the base area was measured. The water treatment apparatus according to this example did not include a chemical tank or a chemical pump as compared to Example 2. The container size was 20 feet, the number of containers was 3, the container installation area was 45 m ² (6 m × 2.5 m × 3), and the container capacity (RO1 exit) was 72 m ³ / h. As a result of the measurement, the amount of water treated by the water treatment unit per area of 1 m ² was 1.6 m ³ / h.

(Comparative example)
Moreover, the conventional building type water treatment apparatus was prepared, the amount of water processed by the water treatment part per 1 m < ² > area was measured, and the comparison with the water treatment apparatus which concerns on this invention was performed. In the case of a building type, there is an RO1 supply tank (that is, an intermediate tank) and a backwash pump, so the installation area is large. The amount of MF filtered water 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. . 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). 0.5 m). As a result of the measurement, the amount of water treated by the water treatment unit per area of 1 m ² was 0.6 m ³ / h.

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

1,37,53 Water treatment equipment 2,38 Container (frame)
3 Water treatment unit 4,39 Base 5,40 Lid 9 MF membrane module 10 RO membrane module 12 RO liquid feed pump (high pressure pump)
13 Backwash chamber (backwashing means)
19 NaClO storage tank (back washing means)
25 MF liquid feed pump 26 Supply pipe (back washing means)
29 High-pressure air supply pipe (high-pressure air supply means)
30 High-pressure air supply pipe (back washing means)
41 Housing 42 Door (movable wall).

Claims (13)

A water treatment device for producing treated water by filtering water to be treated,
When water to be treated having an electric conductivity of 250 μS / cm and a turbidity of 30 NTU is treated by a water treatment unit mounted on a transportable base and including a filtration membrane module and a reverse osmosis membrane module, treated water Of the treated water treated by the water treatment unit is 0.7 m ³ / h or more per 1 m ² of the area of the base, and the supplied to-be-treated material is 10 μS / cm or less. All of the filtered water treated with the filtration membrane module treating all of the water is supplied directly to the reverse osmosis membrane module via a high pressure pump,
A supply pump for supplying the treated water to the filtration membrane module;
A filtrate flow rate measuring means provided between the filtration membrane module and the high pressure pump, for measuring the flow rate of filtrate water of the filtration membrane module;
Pressure detecting means for detecting the suction pressure of the high-pressure pump;
A control unit for controlling the water treatment unit,
The control unit controls the supply pump based on the measurement result of the filtered water flow rate measurement unit, and further, the high pressure pump so that the suction pressure of the high pressure pump becomes positive based on the detection result of the pressure detection unit A water treatment apparatus characterized by controlling water.   The water treatment apparatus according to claim 1, wherein the water treatment unit includes backwashing means for backwashing the filtration membrane module.   The water treatment apparatus according to claim 1, 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 any one of claims 1 to 3, wherein the water treatment unit is housed in a transportable frame.   The water treatment apparatus according to claim 4, wherein a work passage is provided in the transportable frame.   The water treatment apparatus according to claim 4 or 5, wherein the filtration membrane module is installed in the transportable frame so that the total length of the filtration membrane module / the height inside the frame = 90% or less. The filtration membrane module in the transportable frame is installed in parallel to the height direction of the frame,
The water treatment apparatus according to any one of claims 4 to 6, wherein the reverse osmosis membrane module is installed perpendicular to the height direction of the frame.   The water treatment apparatus according to any one of claims 4 to 7, wherein both the valve unit of the filtration membrane module and the valve unit of the reverse osmosis membrane module are provided in the transportable frame.   The water treatment apparatus according to any one of claims 4 to 8, wherein at least one of the filtration membrane module and the reverse osmosis membrane module is fixed using an inner wall of the transportable frame. A water treatment device for producing treated water by filtering water to be treated,
A water treatment unit including a filtration membrane module and a reverse osmosis membrane module;
A high-pressure pump that directly supplies all of the filtered water treated by the filtration membrane module for treating all of the treated water supplied to the reverse osmosis membrane module;
A supply pump for supplying water to be treated to the filtration membrane module;
A filtrate flow rate measuring means provided between the filtration membrane module and the high pressure pump, for measuring the flow rate of filtrate water of the filtration membrane module;
Pressure detecting means for detecting the suction pressure of the high-pressure pump;
A control unit for controlling the water treatment unit,
The control unit controls the supply pump based on the measurement result of the filtered water flow rate measurement unit, and further, the high pressure pump so that the suction pressure of the high pressure pump becomes positive based on the detection result of the pressure detection unit A water treatment apparatus characterized by controlling water. A permeate flow rate measuring means for measuring a permeate flow rate of the reverse osmosis membrane module;
A concentrated water amount adjusting means for adjusting the concentrated water amount of the reverse osmosis membrane module,
11. The water treatment apparatus according to claim 1, wherein the control unit controls the concentrated water amount adjusting unit based on a measurement result of the permeate flow rate measuring unit.   The water treatment apparatus according to any one of claims 1 to 11, wherein all of the filtrate of the filtration membrane module is supplied to the reverse osmosis membrane module.   A water treatment device installation method comprising: assembling the water treatment device according to any one of claims 1 to 9 in advance, then transporting the water treatment device to a construction site, and installing the water treatment device on the construction site.

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