WO2014021541A1 - Controlled filtered water pressure membrane filtration apparatus and membrane-cleaning method therefor - Google Patents

Controlled filtered water pressure membrane filtration apparatus and membrane-cleaning method therefor Download PDF

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Publication number
WO2014021541A1
WO2014021541A1 PCT/KR2013/004017 KR2013004017W WO2014021541A1 WO 2014021541 A1 WO2014021541 A1 WO 2014021541A1 KR 2013004017 W KR2013004017 W KR 2013004017W WO 2014021541 A1 WO2014021541 A1 WO 2014021541A1
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Prior art keywords
filtration
pressure
membrane
water
flow rate
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PCT/KR2013/004017
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French (fr)
Korean (ko)
Inventor
김관엽
김현배
윤희철
남해욱
한현
Original Assignee
주식회사 포스코건설
경일워터이엔지 주식회사
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Priority claimed from KR1020120085159A external-priority patent/KR101264321B1/en
Application filed by 주식회사 포스코건설, 경일워터이엔지 주식회사 filed Critical 주식회사 포스코건설
Priority to BR112015002065-8A priority Critical patent/BR112015002065B1/en
Publication of WO2014021541A1 publication Critical patent/WO2014021541A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/12—Controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/14—Pressure control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/04—Elements in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04—Backflushing

Definitions

  • the present invention relates to a filtered water pressure controlled membrane filter device and a membrane cleaning method thereof, and more particularly, to a membrane filter device, which does not have a separate treated water storage tank for backwashing the membrane and storing the filtered water.
  • the present invention relates to a filtrate pressure controlled membrane filter device using a part of the membrane as a backwash water and a membrane washing method thereof.
  • the separation membrane In the membrane filtration process applied to the water treatment, the separation membrane has voids formed on the surface to remove contaminants, thereby purifying water.
  • the membrane filtration process depends on the characteristics of the raw water to be treated and the water quality requirements of the final treatment water. This may be applied alone or in combination with various treatment processes such as ozone treatment, activated carbon adsorption, reverse osmosis membrane filtration at the end of the membrane filtration process.
  • the filtrate produced from the membrane filtration process is collected in a storage tank, and a pump is installed to apply driving force and pressure for supply flow to the post-stage process. Supply.
  • a membrane filter device in which a permeate tank for backwashing a membrane module is removed is used.
  • the membrane permeate obtained from other membrane modules is used for backwashing, so the membrane filtered water is stopped during backwashing.
  • a method of operating a membrane filter device in which a plurality of modules are installed in parallel to perform filtration and washing steps alternately provides a separate filtrate tank for storing filtrate water.
  • the backwashing operation used to backwash the membrane module is installed, and the filtration process of all modules is stopped at the time of backwashing because the filter water line and the backwash water supply line are composed of one.
  • the filtrate side pressure is usually dependent on the supply side pressure and the intermembrane pressure difference.
  • the materials that do not pass through the membrane accumulate on the membrane surface and the pores, which acts as a resistance to the filtration process, thereby increasing the transmembrane pressure continuously.
  • the feed side pressure is increased to maintain a constant flow rate of the filtrate produced in the membrane filter.
  • the present invention has been made to solve the conventional problems as described above, the treatment water storage tank is unnecessary in the membrane filtration device, which can increase the space efficiency and improve the backwashing efficiency by controlling the pressure of the backwashing filtrate In case of backwashing some membranes, it is possible to provide the same flow rate of the filtered water to the back-end process, to control the input of the backwashing water without a separate operation, to control the pressure of the backwashing water without a separate operation, It is an object of the present invention to provide a filtered water pressure controlled membrane filter device and a membrane cleaning method thereof, which can increase energy efficiency of an entire water treatment process.
  • the present invention for achieving the above object is a membrane filtration device for branching the supply water and filtering by the separation membrane, a plurality of filtration supply unit for supplying the branched supply water to each separation membrane; A plurality of membrane filtration sections for filtering the feed water supplied by the respective filtration supplies by a separation membrane; A plurality of filter discharge parts for discharging the filtered water treated in each of the membrane filter parts; A backwashing unit connected to a downstream of the filtration discharge unit to backwash a part of the filtrate to the membrane filtration unit to backwash the separation membrane; A backwash discharge part connected to each of the membrane filter parts to discharge backwash water to the outside during backwashing of the membrane filter part; And a pressure control unit installed downstream of the filtration discharge unit to control the pressure of the filtrate water.
  • the present invention is characterized in that it further comprises a flow rate control unit connected to the downstream of the membrane filtration unit to measure the flow rate of the filtered water discharged to control the flow rate of the feed water supplied to the membrane filtration unit by the filtration supply unit. .
  • the flow rate control part of the present invention includes: first flow rate measuring means connected to a downstream of the membrane filter part and measuring a flow rate of the filtered water discharged from each membrane filter part; Second flow rate measuring means connected to a downstream of the filtration discharge unit and measuring a flow rate of the total filtered water discharged from the entire membrane filtration unit; It is connected to the first flow rate measuring means and the second flow rate measuring means for providing a flow rate control signal of the feed water supplied to the membrane filter unit according to the measurement results of the first flow rate measuring means and the second flow rate measuring means, respectively.
  • Flow control means And a flow rate adjusting means connected to each of the filtration supply parts to adjust a flow rate of the feed water supplied to the membrane filtration part based on the flow rate control signal of the flow rate control means.
  • the flow rate adjusting means of the present invention adjusts the flow rate of the feed water supplied to the remaining membrane filter part so that the flow rate of the filtered water of the remaining membrane filter part during the backwash of the partial membrane filter part is kept the same as the flow rate of the filtered water of the whole membrane filter part.
  • the filtration supply unit of the present invention a plurality of filtration supply valve for opening and closing the supply of the branched supply water, respectively; And a plurality of filtration supply pumps for pumping the supply water supplied through the respective filtration supply valves.
  • the backwashing unit of the present invention includes: a pressure-expandable backwash tank including a gas tank in which gas is maintained at a constant pressure, a filtration water tank into which filtered water flows in and out, and a partition installed between the gas tank and the filtration water tank so as to stretch their partition space; A backwash water valve installed in the filtered water inlet pipe connected downstream of the filtered discharge part so that a portion of the filtered water flows back to the filtered water tank; And a plurality of backwash injection valves respectively installed in the backwashing introduction pipe branched to discharge the filtered water from the filtrate tank and to be introduced into the respective membrane filtration units.
  • the pressure measuring means is installed downstream of the filtration discharge unit for measuring the pressure of the filtered water; Pressure control means connected to said pressure measuring means for providing a pressure control signal in accordance with the measurement result of said pressure measuring means; And a pressure regulating means installed downstream of the pressure measuring means to adjust the pressure of the filtrate based on the pressure control signal of the pressure controlling means.
  • the present invention is a membrane cleaning method of the filtered water pressure controlled membrane filter device, comprising the steps of: closing the filtration supply unit and the filtration discharge unit connected to any one of the plurality of membrane filtration unit; Opening a filtration supply part and a filtration discharge part connected to the rest of the plurality of membrane filtration parts; Controlling the pressure of the filtered water by a pressure control unit connected to the filtration discharge unit; And opening the backwashing unit and the backwashing unit connected to the membrane filtration unit in which the filtration supply unit and the filtration discharge unit are closed, and closing the remaining backwashing unit and the backwashing unit.
  • the present invention is to measure the flow rate of the filtered water discharged from the remaining membrane filtration unit to maintain the flow rate of the filtration water of the remaining membrane filtration unit at the time of backwashing the partial membrane filtration unit of the entire membrane filtration unit, the respective membranes It characterized in that it further comprises the step of controlling the flow rate of the feed water supplied to the filtration unit.
  • a part of the filtrate filtered in the membrane filtration process is used as a backwash water to control the pressure of the backwashing filtrate, thereby eliminating the need for a treated water storage tank in the membrane filtration device, thereby improving space efficiency. It can increase and control the pressure of the backwashing filtrate to provide the effect of improving the backwashing efficiency.
  • FIG. 1 is a block diagram showing a filtered water pressure controlled membrane filter device according to an embodiment of the present invention.
  • Figure 2 is a state diagram showing the filtration process of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
  • Figure 3 is a state diagram showing the backwashing process of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
  • 4 to 6 is a configuration of the pressure control unit of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
  • FIG. 7 is a graph showing the driving pressure of a conventional membrane filter.
  • FIG. 8 is a graph showing the driving pressure of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
  • Figure 9 is a block diagram showing the filtration process of the filtered water pressure controlled membrane filter device according to an embodiment of the present invention.
  • FIG. 10 is a block diagram showing a backwashing process of the filtrate pressure controlled membrane filter device according to one embodiment of the present invention.
  • FIG 11 is a graph showing a comparison between the filtration flow rate and the backwash flow rate in the filtrate pressure control membrane filter device according to an embodiment of the present invention.
  • FIG. 12 is a flow chart showing a membrane washing method of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention.
  • FIG. 1 is a block diagram showing a filtered water pressure controlled membrane filter device according to an embodiment of the present invention
  • Figure 2 is a state diagram showing a filtration process of a filtered water pressure controlled membrane filter device according to an embodiment of the present invention
  • Figure 3 4 is a state diagram illustrating a backwashing process of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention
  • FIGS. 4 to 6 are configuration diagrams of a pressure control unit of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention.
  • FIG. 7 is a graph showing the driving pressure of the conventional membrane filter
  • Figure 8 is a graph showing the driving pressure of the filtered water pressure control membrane filter device according to an embodiment of the present invention
  • Figure 9 is an embodiment of the present invention 10 is a block diagram illustrating a filtration process of a filtrate pressure controlled membrane filter device according to an example
  • FIG. 10 is a filtrate pressure controlled membrane filter device according to an embodiment of the present invention
  • 11 is a block diagram illustrating a three step process
  • FIG. 11 is a graph illustrating a comparison between a filtration flow rate and a backwash flow rate of a filtrate pressure controlled membrane filter device according to an embodiment of the present invention
  • FIG. 12 is a filtrate water according to an embodiment of the present invention.
  • a flow chart showing a membrane cleaning method for a pressure controlled membrane filter.
  • the filtered water pressure controlled membrane filter device includes a filtration supply part, a membrane filter part, a filtration discharge part, a backwash input part, a backwash discharge part, a pressure control part, a flow rate control part, It is a membrane filtration device which branches supply water and filters it by a separation membrane.
  • the filtration supply part is a supply means provided in each of the branch pipes 1A, 1B, 1C, 1D, and 1E which are divided into a plurality of branches so as to supply the feed water to the separation membrane of each membrane filtration part. 13, 14, 15) and a plurality of filtration feed pumps (31, 32, 33, 34, 35).
  • Filtration supply valves 11, 12, 13, 14, and 15 are respectively installed in branched pipes 1A, 1B, 1C, 1D, and 1E to supply the feed water from the reservoir to the respective membrane filters. In this way, the branched supply water is opened and closed to supply to each membrane filtration unit.
  • the filtration supply valves 11, 12, 13, 14, and 15 of the present embodiment include a first filtration supply valve 11, a second filtration supply valve 12, a third filtration supply valve 13, and a fourth filtration supply. Although it consists of five filtration supply valves of the valve 14 and the 5th filtration supply valve 15, of course, it is also possible to consist of two to four and six or more filtration supply valves.
  • Filtration feed pumps (31, 32, 33, 34, 35) are respectively installed in the branch pipe (1A, 1B, 1C, 1D, 1E) branched to supply the feed water to each membrane filter in the reservoir of the feed water. It is installed downstream of the filtration supply valves 11, 12, 13, 14, and 15, and thus each of the membrane filtration by pumping the feed water supplied through the filtration supply valves (11, 12, 13, 14, 15), respectively. To supply wealth.
  • Filtration supply pumps 31, 32, 33, 34, 35 of the present embodiment Five filtration supply pumps of the first filtration supply pump 31, the second filtration supply pump 32, the third filtration supply pump 33, the fourth filtration supply pump 34, and the fifth filtration supply pump 35.
  • Five filtration supply pumps of the first filtration supply pump 31, the second filtration supply pump 32, the third filtration supply pump 33, the fourth filtration supply pump 34, and the fifth filtration supply pump 35 Of course, but it is also possible to consist of two to four and six or more filtration feed pump.
  • the membrane filtration unit is composed of a plurality of separation membrane filters (61, 62, 63, 64, 65) for filtering the feed water supplied by each filtration supply unit with a separation membrane.
  • Membrane filters 61, 62, 63, 64, 65 are installed in inlet pipes downstream of the respective filtration supply pumps 31, 32, 33, 34, 35, and respective filtration supply pumps 31, 32, 33. , 34, 35) to filter the feed water pumped by the separation membrane to filter the contaminants contained in the feed water, and discharge the filtered filtrate water downstream.
  • the membrane filters 61, 62, 63, 64, and 65 of the present embodiment may include a first membrane filter 61, a second membrane filter 62, a third membrane filter 63, a fourth membrane filter 64, and a second membrane filter 64.
  • the five separator filters of the five separator filters 65 but of course it is also possible to consist of two to four and six or more membrane filters.
  • the filtration discharge part is composed of a plurality of filtration discharge valves 81, 82, 83, 84, 85 for discharging the filtered water treated in each membrane filtration part.
  • Filtration discharge valves 81, 82, 83, 84, and 85 are respectively installed in discharge pipes 30A, 30B, 30C, 30D, and 30E downstream of the membrane filter part for discharging the filtered water from each membrane filter part.
  • the filtered water discharged in this way is opened and closed to discharge from the membrane filtration unit.
  • the filtration discharge valves 81, 82, 83, 84, and 85 of the present embodiment include a first filtration discharge valve 81, a second filtration discharge valve 82, a third filtration discharge valve 83, and a fourth filtration discharge valve. It consists of five filtration discharge valves of the valve 84 and the 5th filtration discharge valve 85, Of course, it is also possible to consist of two to four and six or more filtration discharge valves.
  • the backwashing section is connected to a downstream side of the filtration discharge section to input a portion of the filtrate to the membrane filtration section of any one of the plurality of membrane filtration sections without having a separate treatment water storage tank for storing the filtered water discharged from the plurality of membrane filtration sections.
  • it consists of a non-powered pressure expansion backwash tank 500, the backwash valve 600, and the plurality of backwash injection valves 91, 92, 93, 94, 95.
  • the pressure-expanded backwash tank 500 is a gas tank 510 as a supply means for backwashing filtrate which flows in and out of filtrate by non-power by the expansion and contraction using the pressure of gas, as shown in FIGS. It consists of a filtration water tank 520 and a membrane 530.
  • the gas tank 510 is a storage tank sealed to maintain the gas at a constant pressure, and the filtrate tank 520 is installed in the backwash filtrate inlet pipe branched from the filtrate discharge pipe, and the inlet port 521 so that the backwash filtrate flows in and out. ) And an outlet 522 are provided.
  • the diaphragm 530 is provided between the gas tank 510 and the filtration tank 520, and partitions these spaces, and the direction of the gas tank 510 or the direction of the filtration tank 520 is divided by the pressure difference therebetween. It is installed to stretch.
  • the backwash water valve 600 is a valve installed in the backwashing water inlet pipe branched from the filtrate discharge pipe so as to open and close the inflow of backwashing filtrate into the filtrate tank 520, and is opened for backwashing of some membrane filters.
  • the backwash injection valves 91, 92, 93, 94, and 95 are backwashing pipes connected downstream of the membrane filtration unit in order to flow the filtered water treated in each membrane filtration unit to one of the plurality of membrane filtration units. 40A, 40B, 40C, 40D, and 40E), respectively, to open and close the backflow of the filtered water to be introduced into the membrane filtration unit.
  • the backwash check valves 91, 92, 93, 94, 95 of the present embodiment include a first backwash check valve 91, a second backwash check valve 92, a third backwash check valve 93, and a fourth backwash check valve.
  • the valve 94 and the five back check valves of the fifth back check valve 95 are composed of, two to four and six or more back check valves may be made.
  • the backwash discharge part comprises a plurality of backwash discharge valves 21, 22, 23, 24, and 25 connected to each membrane filter part and discharging the backwashing water discharged from the membrane filter part to the outside during back washing of the membrane filter part.
  • the backwash discharge valves 21, 22, 23, 24, and 25 are respectively connected to the backwash discharge pipes 2A, 2B, 2C, 2D, and 2E connected to the membrane filter to discharge the backwashed backwashed water from the respective membrane filters. It is installed, and the backwashing discharged in this way is opened and closed to discharge from the membrane filter unit to the outside.
  • the backwash discharge valves 21, 22, 23, 24, and 25 of the present embodiment include a first backwash discharge valve 21, a second backwash discharge valve 22, a third backwash discharge valve 23, and a fourth backwash discharge valve. Although it consists of five backwash discharge valves of the valve 24 and the 5th backwash discharge valve 25, of course, it is also possible to consist of two to four and six or more backwash discharge valves.
  • the pressure control unit is configured to control the pressure of the filtrate discharged and installed downstream of the filtration discharge unit to provide an appropriate pressure to the backwash filtrate during backwashing of some membrane filters, and includes a pressure measuring means, a pressure control means and a pressure adjusting means. Doing.
  • the pressure measuring means comprises a filtration process pressure sensor 800 which is installed downstream of the filtration discharge part and measures the pressure of the filtrate, and the pressure control means is connected to the pressure measuring means to generate a pressure control signal according to the measurement result of the pressure measuring means. It provides a filtration process pressure controller 810, the pressure regulating means is installed downstream of the pressure measuring means to the filtration process pressure control valve 100 for adjusting the pressure of the filtrate based on the pressure control signal of the pressure control means. It is preferable that it is made.
  • the flow rate control unit is connected to the downstream of the membrane filtration unit, and measures the flow rate of the discharged filtered water to control the flow rate of the supply water supplied to the membrane filtration unit by the filtration supply unit, the first flow rate control means, the second flow rate control means And flow rate control means and flow rate control means.
  • the first flow control means comprises a plurality of filtered discharge water flow rate sensors 71, 72, 73, 74, 75 which are connected downstream of the membrane filter part and respectively measure the flow rate of the filtered water discharged from each membrane filter part.
  • the filtration discharge water flow rate sensors 71, 72, 73, 74, and 75 of the present embodiment include a first filtration discharge water flow rate sensor 71, a second filtration discharge water flow rate sensor 72, a third filtration discharge water flow rate sensor 73, although it consists of five filtration discharge water flow rate sensors of the 4th filtration discharge water flow rate sensor 74 and the 5th filtration discharge water flow rate sensor 75, it is a matter of course that it is also comprised from 2-4 pieces and 6 or more filtration discharge water flow rate sensors. .
  • the second flow control means comprises a filtrate flow rate sensor 700 which is connected downstream of the filtrate discharge portion and measures the flow rate of the total filtrate water discharged from the entire membrane filter portion.
  • the flow rate control means is composed of a flow rate controller 710 connected to the first flow rate measuring means and the second flow rate measuring means and providing a control signal to control the flow rate of the supply water respectively supplied to the membrane filtration unit.
  • the flow rate adjusting means is a plurality of pump speed controllers 41, 42, 43, 44, 45 which are respectively connected to the filtration supply part and regulate the flow rate of the feed water supplied to each membrane filter part by the command of the flow rate control means. consist of.
  • the pump speed controller 41, 42, 43, 44, 45 of the present embodiment includes a first pump speed controller 41, a second pump speed controller 42, a third pump speed controller 43, It consists of five pump speed controllers of the fourth pump speed controller 44 and the fifth pump speed controller 45, but of course, it is also possible to include two to four and six or more pump speed controllers. .
  • the flow rate adjusting means adjusts the flow rate of the feed water supplied to the remaining membrane filter part so that the flow rate of the filtered water of the remaining membrane filter part is kept equal to the flow rate of the filtered water of the entire membrane filter part during back washing of some membrane filter parts.
  • the rear end process pressure regulating valve 200, the rear end pressure sensor 900, and the rear end installed downstream of the filtrate pressure controlled membrane filter are provided.
  • the process pressure controller 910 it is also possible to adjust the pressure of the filtered water required for the post-stage process by the process pressure controller 910.
  • the rear stage pressure control valve 200 is installed downstream of the rear stage to adjust the pressure of the filtered water flowing into the rear stage.
  • the post-stage process pressure sensor 900 is preferably composed of a pressure sensor installed upstream of the post-stage process to measure the pressure of the filtered water flowing into the rear stage process.
  • the after-stage process pressure controller 910 is connected to the after-stage process pressure control valve 200 and the after-stage process pressure sensor 900 to open the post-stage process pressure control valve 200 according to the measurement result of the after-stage process pressure sensor 900. By adjusting the control signal is provided to control the pressure of the filtered water required for the post-stage process.
  • the filtrate pressure control membrane filter device of the present embodiment has a problem in that a post-stage process supply pump is separately installed to reinforce the loss of the driving pressure caused by the filtrate storage tank as shown in the driving pressure graph of the conventional membrane filter device of FIG. 7.
  • the pressure loss is reduced by the pressure control part made up of the non-powered pressure squeezed backwash tank, thereby driving the filtered water without installing a separate post process feed pump.
  • the pressure can be used as the driving pressure of the post-stage process as it is.
  • the filtration flow rate of the whole membrane filter in the filtration process of the whole membrane filter is composed of the total filtration flow rate (Q t ) and the backwash flow rate (Q b ), and the filtration flow rate of each membrane filter ( q) can be constituted by any it knows the value obtained by dividing the sum (Q t + Q b) of the total permeate flow rate (Q t) and the back washing flow rate (Q b) to the number (n) of the membrane filter.
  • the filtration flow rate q of each remaining membrane filter is divided by the total filtration flow rate Q t by the number of remaining membrane filters n-1. It can be seen that it consists of a value.
  • the backwash flow rate is the filter flow rate for each series for effective desorption of contaminants attached to the separation membrane during backwashing Supplying a flow rate of 1 to 3 times (q) (a value in Fig. 11), and the membrane filter unit is provided with two or more series of separation membrane filter to further filter the flow rate of the filtrate consumed during backwashing It is measured.
  • the ratio of the backwash flow rate to the total filtration flow rate of the membrane filtration device is lower as the backwash flow rate ratio, ie, the backwash flow rate multiplier is smaller, and the higher the number of series of the membrane filtration device.
  • the low filtration flow rate per unit area, ie the permeate flux means that the membrane filtration device can be stably operated for a long time.
  • the membrane fouling material may not be easily removed during the backwash of the membrane, and the recovery performance of the membrane may be lowered. If the permeate flux is too low, it means that it is uneconomical because a plurality of membranes should be installed.
  • the ratio of the backwash flow rate to the cleavage water of the cleavage water of 4 to 10 membrane filters is 10 to 40%. It can be seen that it is preferable to maintain as.
  • the membrane washing method of the filtered water pressure-controlled membrane filter device of the present embodiment the closing step (S10) of some of the filtration supply and filtration discharge portion, the opening step of the remaining filtration supply and filtration discharge portion ( S20), the pressure control step of the filtered water (S30), the opening step of some backwashing and backwash discharge (S40), the closing step of the remaining backwashing and backwash discharge (S50), the flow rate control step of the feed water (S60) )
  • Closing step (S10) of the part of the filtration supply unit and the filtration discharge unit is a step of closing the filtration supply unit and the filtration discharge unit connected to any one of the plurality of membrane filtration units, and the first filtration supply valve 11 and the first filtration discharge valve. Closing (81) closes the filtration process of the first membrane filter (61).
  • Opening of the remaining filtration supply unit and the filtration discharge unit is a step of opening the filtration supply unit and the filtration discharge unit connected to the rest of the plurality of membrane filters, the second to fifth filtration supply valves (12, 13, 14, 15) and the second to fifth filtration discharge valves 82, 83, 84, 85 are opened to perform the filtration process of the second to fifth separation membrane filters 62, 63, 64, 65.
  • Pressure control step (S30) of the filtered water is a step of controlling the pressure of the filtered water by the pressure control unit connected to the filtration discharge unit, the opening degree of the filtration process pressure control valve 100 in accordance with the measurement result of the filtration process pressure sensor 800 The pressure of the filtrate is controlled to provide an appropriate pressure to the backwash filtrate during backwashing of some membrane filters.
  • the opening of the backwashing portion and the backwashing portion of the portion (S40) is a step of opening the backwashing portion and the backwashing portion connected to the membrane filtration portion in which the filtration supply portion and the filtration discharge portion are closed, and the backwashing valve 91 and the backwashing discharge
  • the valve 21 is opened to perform the backwashing process of the first separator filter 61.
  • the closing step S50 of the remaining backwashing unit and the backwashing unit is a step of closing the remaining backwashing unit and the backwashing unit, and the second to fifth backwashing valves 92, 93, 94, 95 and the second to fifth backwashing unit are closed.
  • the fifth backwash discharge valves 22, 23, 24, and 25 are closed to stop the backwashing process of the second to fifth separator filters 62, 63, 64, and 65.
  • Supply flow rate control step (S60) by measuring the flow rate of the filtered water discharged from the remaining membrane filtration unit to maintain the flow rate of the filtration water of the remaining membrane filtration unit during the backwash of some membrane filtration unit, the same as the flow rate of the filtration water of the whole membrane filtration unit Controlling the flow rate of the feed water supplied to each membrane filtration unit, by measuring the flow rate of the filtered water discharged from the remaining membrane filtration unit with the filtered water flow sensor 700 to the remaining membrane filtration unit by the flow controller 710 A control signal is provided to control the flow rate of the feed water, and the second to fifth pump speed controllers 42, 43, 44, and 45 are used to control the second to fifth filtration supply pumps 32, 33, 34 and 35 are controlled to adjust the flow rate of the feed water supplied to the second to fifth separator filters 62, 63, 64, and 65.
  • a portion of the filtered water filtered in the membrane filtration process is used as a backwash water and the pressure of the backwashing filtrate is controlled, thereby eliminating the need for a treated water storage tank in the membrane filtration device. It can increase and control the pressure of the backwashing filtrate to provide the effect of improving the backwashing efficiency.
  • the present invention provides a filtered water pressure controlled membrane filter device and a membrane cleaning method using a portion of the filtered water treated in the membrane filtration process as a backwash water of the membrane without providing a separate treated water storage tank for backwashing the membrane and storing the filtered water in the membrane filtration device.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The present invention relates to a controlled filtered water pressure membrane filtration apparatus and to a membrane-cleaning method therefor. The membrane filtration apparatus that branches supplied water and filters the water using a separation membrane includes: a plurality of filtering supply units; a plurality of membrane filtration units that filter the supplied water; a plurality of filtering discharge units that discharge filtered water; a backwash cleaning input unit that reverse-cleans some of the filtered water through backflow; a backwash discharge unit that discharges backwashed treated water to the outside; and a pressure control unit that controls the pressure of the backwashed filtered water. According to the present invention, some of the filtered water filtered through a membrane filtration process is used as the backwashed water through the backflow, and the pressure of the backwashed filtered water is controlled such that a tank for storing the treated water is not necessary in the membrane filtration apparatus. Accordingly, the efficiency of space usage can be increased, and the pressure of the backwashed filtered water is controlled such that backwash efficiency can be improved.

Description

여과수 압력제어형 막여과장치 및 그의 막세척방법Filtrate Pressure Control Membrane Filter and Membrane Cleaning Method
본 발명은 여과수 압력제어형 막여과장치 및 그의 막세척방법에 관한 것으로서, 보다 상세하게는 막여과장치에 분리막 역세척 및 여과수 저장을 위한 별도의 처리수 저장조를 두지 않고서 막여과공정에서 처리된 여과수의 일부를 분리막의 역세척수로 이용하는 여과수 압력제어형 막여과장치 및 그의 막세척방법에 관한 것이다.The present invention relates to a filtered water pressure controlled membrane filter device and a membrane cleaning method thereof, and more particularly, to a membrane filter device, which does not have a separate treated water storage tank for backwashing the membrane and storing the filtered water. The present invention relates to a filtrate pressure controlled membrane filter device using a part of the membrane as a backwash water and a membrane washing method thereof.
수처리에 적용되는 막여과공정에서 분리막은 표면에 공극이 형성되어 있어 이를 통해 오염물질이 배제됨으로써 물이 정화처리되는데, 수처리 대상원수의 성상 및 수처리공정 최종처리수의 수질요구조건 등에 따라 막여과공정이 단독으로 적용되거나 막여과공정 후단에 오존처리, 활성탄흡착, 역삼투막여과 등과 같은 여러종류의 처리공정과 조합하여 적용된다.In the membrane filtration process applied to the water treatment, the separation membrane has voids formed on the surface to remove contaminants, thereby purifying water.The membrane filtration process depends on the characteristics of the raw water to be treated and the water quality requirements of the final treatment water. This may be applied alone or in combination with various treatment processes such as ozone treatment, activated carbon adsorption, reverse osmosis membrane filtration at the end of the membrane filtration process.
종래의 방법에서는 통상적으로 막여과공정과 후처리공정을 조합하는 경우, 막여과공정으로부터 생산되는 여과수를 저류조에 집수한 후, 후단공정으로의 공급유동을 위한 구동력 및 압력을 가하기 위하여 펌프를 설치하여 공급한다.In the conventional method, when combining the membrane filtration process and the post-treatment process, the filtrate produced from the membrane filtration process is collected in a storage tank, and a pump is installed to apply driving force and pressure for supply flow to the post-stage process. Supply.
그러나 이 경우에, 분리막을 투과한 여과수를 저류하기 위한 별도의 처리수 저장조가 필요하며 수처리 공정의 처리용량 커질수록 처리수 저장조의 용적 또한 증가하여 공간을 차지하게 되며 막여과를 위해 적용되는 구동압력이 처리수 저장조에서 소실되어 후처리공정 구동을 위해서는 추가적인 구동설비가 필요하다는 문제가 있다.In this case, however, a separate treatment water storage tank is needed to store the filtered water that has passed through the membrane, and as the treatment capacity of the water treatment process increases, the volume of the treatment water storage tank also increases to occupy space, and the driving pressure applied for membrane filtration. There is a problem that additional driving equipment is required to drive the post-treatment process, which is lost in the treated water storage tank.
또한, 여과수가 처리수 저장조에 체류하는 동안 처리수 저장조에서 오염이 발생되어 역세척시 오염된 역세수로 인해 오히려 분리막의 오염이 심화되는 문제점이 있다.In addition, there is a problem that the contamination of the separation membrane due to the backwash water contaminated during the backwash due to the contamination occurs in the treated water reservoir while the filtered water stays in the treated water reservoir.
다른 종래의 방법으로 막모듈 역세를 위한 투과수조를 제거한 막여과장치(일본 공개특허공보 제2002-346348호)에서는 복수의 막모듈을 갖추는 막여과장치에 있어서 역세를 실시하는 막모듈에 다른 막모듈에서 얻어진 막투과수를 직접 통액하여 역세할 수 있도록 하였으나 이 경우 역세를 실시하는 동안에는 다른 막모듈에서 얻어진 막투과수가 모두 역세에 사용되므로 역세동안에는 막여과수 생산이 중단되며 이 막여과장치와 후단공정과 결합시 후단공정으로의 공급유량이 주기적으로 중단되는 문제점이 있다.In another conventional method, a membrane filter device (JP-A-2002-346348) in which a permeate tank for backwashing a membrane module is removed is used. In this case, the membrane permeate obtained from other membrane modules is used for backwashing, so the membrane filtered water is stopped during backwashing. When combined, there is a problem that the supply flow to the back end process is periodically stopped.
또 다른 종래의 방법으로 복수의 모듈을 병렬로 설치하여 여과와 세정공정을 교대로 실시하는 막여과장치의 운전방법(일본 공개특허공보 제2002-246302호)에서는 여과수를 저장하는 별도의 여과수탱크를 설치하여 분리막 모듈의 역세에 사용하는 역세운전을 실시하며 여과수라인과 역세수 공급라인이 하나로 구성되어 역세시 모든 모듈의 여과공정이 중단된다.In another conventional method, a method of operating a membrane filter device in which a plurality of modules are installed in parallel to perform filtration and washing steps alternately (Japanese Laid-Open Patent Publication No. 2002-246302) provides a separate filtrate tank for storing filtrate water. The backwashing operation used to backwash the membrane module is installed, and the filtration process of all modules is stopped at the time of backwashing because the filter water line and the backwash water supply line are composed of one.
종래의 막여과공정에서는 통상적으로 여과수측 압력이 공급측 압력 및 막간차압에 종속된다. 즉, 막여과장치에서는 운전이 지속될수록 분리막을 통과하지 못한 물질들이 분리막 표면 및 공극에 쌓이게 되고, 이로 인해 여과공정에 저항으로 작용하게 되어 막간차압(Transmembrane pressure)이 지속적으로 증가하게 되는데, 이 경우 막여과장치에서 생산되는 여과수의 유량을 일정하게 유지하기 위해 공급측 압력을 증가시키게 된다. In a conventional membrane filtration process, the filtrate side pressure is usually dependent on the supply side pressure and the intermembrane pressure difference. In other words, in the membrane filtration system, as the operation continues, the materials that do not pass through the membrane accumulate on the membrane surface and the pores, which acts as a resistance to the filtration process, thereby increasing the transmembrane pressure continuously. The feed side pressure is increased to maintain a constant flow rate of the filtrate produced in the membrane filter.
그러나, 여과수측 압력은 공급압과 막간차압에 따라 종속적으로 정해지므로, 후단공정과의 조합이나 여과수의 직접 사용을 위한 공급압력이 필요로 한 경우에는 이 압력을 독립적으로 제어할 수 없다는 문제점이 있다.However, since the pressure of the filtrate is determined in dependence on the supply pressure and the intermembrane pressure, there is a problem in that the pressure cannot be controlled independently when the supply pressure for the combination of the post-stage process or the direct use of the filtrate is required. .
본 발명은 상기와 같은 종래의 문제점을 해소하기 위해 안출한 것으로서, 막여과장치에서 처리수 저장조가 불필요하여 이로 인해 공간효율성을 높일 수 있고 역세용 여과수의 압력을 제어하여 역세효율을 향상시킬 수 있고, 일부 분리막의 역세시에도 후단공정에 동일한 여과수의 유량을 제공할 수 있고, 별도의 조작없이 역세용 여과수의 투입을 제어할 수 있고, 별도의 조작없이 역세용 여과수의 압력을 제어할 수 있고, 전체 수처리공정의 에너지 효율을 증가시킬 수 있는 여과수 압력제어형 막여과장치 및 그의 막세척방법를 제공하는 것을 그 목적으로 한다. The present invention has been made to solve the conventional problems as described above, the treatment water storage tank is unnecessary in the membrane filtration device, which can increase the space efficiency and improve the backwashing efficiency by controlling the pressure of the backwashing filtrate In case of backwashing some membranes, it is possible to provide the same flow rate of the filtered water to the back-end process, to control the input of the backwashing water without a separate operation, to control the pressure of the backwashing water without a separate operation, It is an object of the present invention to provide a filtered water pressure controlled membrane filter device and a membrane cleaning method thereof, which can increase energy efficiency of an entire water treatment process.
상기와 같은 목적을 달성하기 위한 본 발명은, 공급수를 분기하여 분리막에 의해 여과하는 막여과장치로서, 분기된 공급수를 각각의 분리막에 공급하는 복수의 여과공급부; 상기 각각의 여과공급부에 의해 공급된 공급수를 분리막에 의해 여과하는 복수의 막여과부; 상기 각각의 막여과부에서 처리된 여과수를 배출하는 복수의 여과배출부; 상기 여과배출부의 하류에 접속되어 여과수의 일부를 상기 막여과부로 역류시켜 분리막을 역세척하는 역세투입부; 상기 각각의 막여과부에 연결되어 상기 막여과부의 역세척시 역세처리수를 외부로 배출하는 역세배출부; 및 상기 여과배출부의 하류에 설치되어 여과수의 압력을 제어하는 압력제어부;를 포함하는 것을 특징으로 한다.The present invention for achieving the above object is a membrane filtration device for branching the supply water and filtering by the separation membrane, a plurality of filtration supply unit for supplying the branched supply water to each separation membrane; A plurality of membrane filtration sections for filtering the feed water supplied by the respective filtration supplies by a separation membrane; A plurality of filter discharge parts for discharging the filtered water treated in each of the membrane filter parts; A backwashing unit connected to a downstream of the filtration discharge unit to backwash a part of the filtrate to the membrane filtration unit to backwash the separation membrane; A backwash discharge part connected to each of the membrane filter parts to discharge backwash water to the outside during backwashing of the membrane filter part; And a pressure control unit installed downstream of the filtration discharge unit to control the pressure of the filtrate water.
또한, 본 발명은 상기 막여과부의 하류에 접속되어, 배출되는 여과수의 유량을 측정하여 상기 여과공급부에 의해 상기 막여과부로 공급되는 공급수의 유량을 제어하는 유량제어부를 더 포함하는 것을 특징으로 한다.In addition, the present invention is characterized in that it further comprises a flow rate control unit connected to the downstream of the membrane filtration unit to measure the flow rate of the filtered water discharged to control the flow rate of the feed water supplied to the membrane filtration unit by the filtration supply unit. .
본 발명의 상기 유량제어부는, 상기 막여과부의 하류에 접속되어 각 막여과부로부터 배출되는 여과수의 유량을 측정하는 제1 유량측정수단; 상기 여과배출부의 하류에 접속되어 전체 막여과부로부터 배출되는 전체 여과수의 유량을 측정하는 제2 유량측정수단; 상기 제1 유량측정수단 및 상기 제2 유량측정수단에 연결되어 상기 제1 유량측정수단 및 상기 제2 유량측정수단의 측정결과에 따라 상기 막여과부로 각각 공급되는 공급수의 유량제어신호를 제공하는 유량제어수단; 및 상기 여과공급부에 각각 연결되어 상기 유량제어수단의 유량제어신호에 의거해서 상기 막여과부로 공급되는 공급수의 유량을 조절하는 유량조절수단;으로 이루어져 있다.The flow rate control part of the present invention includes: first flow rate measuring means connected to a downstream of the membrane filter part and measuring a flow rate of the filtered water discharged from each membrane filter part; Second flow rate measuring means connected to a downstream of the filtration discharge unit and measuring a flow rate of the total filtered water discharged from the entire membrane filtration unit; It is connected to the first flow rate measuring means and the second flow rate measuring means for providing a flow rate control signal of the feed water supplied to the membrane filter unit according to the measurement results of the first flow rate measuring means and the second flow rate measuring means, respectively. Flow control means; And a flow rate adjusting means connected to each of the filtration supply parts to adjust a flow rate of the feed water supplied to the membrane filtration part based on the flow rate control signal of the flow rate control means.
본 발명의 상기 유량조절수단은, 상기 일부 막여과부의 역세시 나머지 막여과부의 여과수의 유량을 전체 막여과부의 여과수의 유량과 동일하게 유지되도록 나머지 막여과부로 공급되는 공급수의 유량을 조절한다.The flow rate adjusting means of the present invention adjusts the flow rate of the feed water supplied to the remaining membrane filter part so that the flow rate of the filtered water of the remaining membrane filter part during the backwash of the partial membrane filter part is kept the same as the flow rate of the filtered water of the whole membrane filter part.
본 발명의 상기 여과공급부는, 분기된 공급수의 공급을 각각 개폐하는 복수의 여과공급밸브; 및 상기 각각의 여과공급밸브를 통해 공급된 공급수를 펌핑하는 복수의 여과공급펌프;로 이루어져 있다.The filtration supply unit of the present invention, a plurality of filtration supply valve for opening and closing the supply of the branched supply water, respectively; And a plurality of filtration supply pumps for pumping the supply water supplied through the respective filtration supply valves.
본 발명의 상기 역세투입부는, 가스가 일정 압력으로 유지되는 가스조와, 여과수가 유출입하는 여과수조와, 상기 가스조와 상기 여과수조 사이에 이들의 구획공간을 신축하도록 설치된 간막으로 이루어진 압력팽창식 역세탱크; 여과수의 일부가 역류되어 상기 여과수조에 유입되도록 상기 여과배출부의 하류에 연결된 여과수 유입관에 설치된 역세수 밸브; 및 상기 여과수조로부터 여과수가 배출되어 상기 각각의 막여과부로 투입되도록 분기된 역세투입관에 각각 설치된 복수의 역세투입밸브;로 이루어져 있다.The backwashing unit of the present invention includes: a pressure-expandable backwash tank including a gas tank in which gas is maintained at a constant pressure, a filtration water tank into which filtered water flows in and out, and a partition installed between the gas tank and the filtration water tank so as to stretch their partition space; A backwash water valve installed in the filtered water inlet pipe connected downstream of the filtered discharge part so that a portion of the filtered water flows back to the filtered water tank; And a plurality of backwash injection valves respectively installed in the backwashing introduction pipe branched to discharge the filtered water from the filtrate tank and to be introduced into the respective membrane filtration units.
본 발명의 상기 압력제어부는, 상기 여과배출부의 하류에 설치되어 여과수의 압력을 측정하는 압력측정수단; 상기 압력측정수단에 접속되어 상기 압력측정수단의 측정결과에 따라 압력제어신호를 제공하는 압력제어수단; 및 상기 압력측정수단의 하류에 설치되어 상기 압력제어수단의 압력제어신호에 의거해서 여과수의 압력을 조절하는 압력조절수단;으로 이루어져 있다.The pressure control unit of the present invention, the pressure measuring means is installed downstream of the filtration discharge unit for measuring the pressure of the filtered water; Pressure control means connected to said pressure measuring means for providing a pressure control signal in accordance with the measurement result of said pressure measuring means; And a pressure regulating means installed downstream of the pressure measuring means to adjust the pressure of the filtrate based on the pressure control signal of the pressure controlling means.
또한, 본 발명은 상기 기재된 여과수 압력제어형 막여과장치의 막세척방법으로서, 복수의 막여과부 중 어느 하나에 접속된 여과공급부와 여과배출부를 폐쇄하는 단계; 복수의 막여과부 중 나머지에 접속된 여과공급부와 여과배출부를 개방하는 단계; 상기 여과배출부에 접속된 압력제어부에 의해 여과수의 압력을 제어하는 단계; 및 상기 여과공급부와 여과배출부가 폐쇄된 막여과부에 접속된 역세투입부와 역세배출부를 개방하고, 나머지의 역세투입부와 역세배출부를 폐쇄하는 단계;를 포함하는 것을 특징으로 한다.In addition, the present invention is a membrane cleaning method of the filtered water pressure controlled membrane filter device, comprising the steps of: closing the filtration supply unit and the filtration discharge unit connected to any one of the plurality of membrane filtration unit; Opening a filtration supply part and a filtration discharge part connected to the rest of the plurality of membrane filtration parts; Controlling the pressure of the filtered water by a pressure control unit connected to the filtration discharge unit; And opening the backwashing unit and the backwashing unit connected to the membrane filtration unit in which the filtration supply unit and the filtration discharge unit are closed, and closing the remaining backwashing unit and the backwashing unit.
또한, 본 발명은 상기 일부 막여과부의 역세시 나머지 막여과부의 여과수의 유량을 전체 막여과부의 여과수의 유량과 동일하게 유지되도록, 나머지 막여과부로부터 배출되는 여과수의 유량을 측정하여 상기 각각의 막여과부로 공급되는 공급수의 유량을 제어하는 단계를 더 포함하는 것을 특징으로 한다.In addition, the present invention is to measure the flow rate of the filtered water discharged from the remaining membrane filtration unit to maintain the flow rate of the filtration water of the remaining membrane filtration unit at the time of backwashing the partial membrane filtration unit of the entire membrane filtration unit, the respective membranes It characterized in that it further comprises the step of controlling the flow rate of the feed water supplied to the filtration unit.
이상에서 살펴본 바와 같이, 본 발명은 막여과공정에서 여과된 여과수의 일부를 역류시켜 역세수로 이용하고 역세용 여과수의 압력을 제어함으로써, 막여과장치에서 처리수 저장조가 불필요하여 이로 인해 공간효율성을 높일 수 있고 역세용 여과수의 압력을 제어하여 역세효율을 향상시킬 수 있는 효과를 제공한다.As described above, in the present invention, a part of the filtrate filtered in the membrane filtration process is used as a backwash water to control the pressure of the backwashing filtrate, thereby eliminating the need for a treated water storage tank in the membrane filtration device, thereby improving space efficiency. It can increase and control the pressure of the backwashing filtrate to provide the effect of improving the backwashing efficiency.
또한, 막여과부의 하류에 유량제어부를 설치하여 공급수와 여과수의 유량을 제어함으로써, 일부 분리막의 역세시에도 후단공정에 동일한 여과수의 유량을 제공할 수 있게 된다.Further, by installing a flow rate control unit downstream of the membrane filtration unit to control the flow rates of the feed water and the filtered water, it is possible to provide the same flow rate of the filtered water to the post-stage process even when backwashing some of the separation membranes.
또한, 역세투입부로 무동력의 압력팽창식 역세탱크를 사용함으로써, 별도의 조작없이 역세용 여과수의 투입을 제어할 수 있는 효과를 제공한다.In addition, by using a non-powered pressure-expandable backwash tank as a backwashing injection unit, it provides an effect of controlling the input of backwashing filtrate without any separate operation.
또한, 여과배출부의 하류에 압력제어부를 설치하여 여과수의 압력을 제어함으로써, 별도의 조작없이 역세용 여과수의 압력을 제어할 수 있는 효과를 제공한다.In addition, by installing a pressure control unit downstream of the filtration discharge unit to control the pressure of the filtrate, it provides an effect that can control the pressure of the backwashing filtrate without a separate operation.
또한, 막여과공정의 여과수의 압력을 소실시키지 않고, 후단공정에 이용하며 후단공정의 공급측 압력 요구조건에 따라 막여과공정의 여과수측 압력을 독립적으로 임의제어 함으로써, 전체 수처리공정의 에너지 효율을 증가시킬 수 있는 효과를 제공한다.In addition, it is possible to increase the energy efficiency of the entire water treatment process by controlling the filtration water side pressure of the membrane filtration process independently and arbitrarily according to the supply side pressure requirements of the post-stage process without losing the pressure of the filtered water of the membrane filtration process. It provides the effect.
도 1은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치를 나타내는 구성도.1 is a block diagram showing a filtered water pressure controlled membrane filter device according to an embodiment of the present invention.
도 2는 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 여과공정을 나타내는 상태도.Figure 2 is a state diagram showing the filtration process of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
도 3은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 역세공정을 나타내는 상태도.Figure 3 is a state diagram showing the backwashing process of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
도 4 내지 도 6은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 압력제어부를 구성상태도.4 to 6 is a configuration of the pressure control unit of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
도 7은 종래의 막여과장치의 구동압력을 나타내는 그래프.7 is a graph showing the driving pressure of a conventional membrane filter.
도 8은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 구동압력을 나타내는 그래프.8 is a graph showing the driving pressure of the filtered water pressure control membrane filter device according to an embodiment of the present invention.
도 9는 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 여과공정을 나타내는 블럭도.Figure 9 is a block diagram showing the filtration process of the filtered water pressure controlled membrane filter device according to an embodiment of the present invention.
도 10은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 역세공정을 나타내는 블럭도.10 is a block diagram showing a backwashing process of the filtrate pressure controlled membrane filter device according to one embodiment of the present invention.
도 11은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 여과유량과 역세유량의 비교를 나타내는 그래프.11 is a graph showing a comparison between the filtration flow rate and the backwash flow rate in the filtrate pressure control membrane filter device according to an embodiment of the present invention.
도 12는 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 막세척방법을 나타내는 흐름도.12 is a flow chart showing a membrane washing method of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of Symbols for Main Parts of Drawings>
11, 12, 13, 14, 15: 여과공급밸브11, 12, 13, 14, 15: Filtration supply valve
21, 22, 23, 24, 25: 역세배출밸브21, 22, 23, 24, 25: Backwash discharge valve
31, 32, 33, 34, 35: 여과공급펌프31, 32, 33, 34, 35: Filtration supply pump
61, 62, 63, 64, 65: 분리막 여과기61, 62, 63, 64, 65: membrane filter
81, 82, 83, 84, 85: 여과배출밸브81, 82, 83, 84, 85: Filtration discharge valve
91, 92, 93, 94, 95: 여과투입밸브91, 92, 93, 94, 95: Filtration inlet valve
100: 여과공정 압력조절밸브100: filtration process pressure control valve
200: 후단공정 압력조절밸브200: downstream process pressure control valve
500: 압력팽창식 역세탱크500: pressure expansion backwash tank
600: 역세수 밸브600: backwash valve
700: 여과수 유량센서700: Filtrate Flow Sensor
800: 여과공정 압력센서800: Filtration pressure sensor
810: 여과공정 압력제어기810: Filtration pressure controller
900: 후단공정 압력센서900: post process pressure sensor
910: 후단공정 압력제어기910: post process pressure controller
이하, 첨부도면을 참조하여 본 발명의 일실시예에 의한 여과수 압력제어형 막여과장치를 더욱 상세히 설명한다. Hereinafter, the filtrate pressure controlled membrane filter device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치를 나타내는 구성도이고, 도 2는 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 여과공정을 나타내는 상태도이고, 도 3은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 역세공정을 나타내는 상태도이고, 도 4 내지 도 6은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 압력제어부를 구성상태도이고, 도 7은 종래의 막여과장치의 구동압력을 나타내는 그래프이고, 도 8은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 구동압력을 나타내는 그래프이고, 도 9는 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 여과공정을 나타내는 블럭도이고, 도 10은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 역세공정을 나타내는 블럭도이고, 도 11은 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 여과유량과 역세유량의 비교를 나타내는 그래프이고, 도 12는 본 발명의 일 실시예에 의한 여과수 압력제어형 막여과장치의 막세척방법을 나타내는 흐름도이다.1 is a block diagram showing a filtered water pressure controlled membrane filter device according to an embodiment of the present invention, Figure 2 is a state diagram showing a filtration process of a filtered water pressure controlled membrane filter device according to an embodiment of the present invention, Figure 3 4 is a state diagram illustrating a backwashing process of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention, and FIGS. 4 to 6 are configuration diagrams of a pressure control unit of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention. 7 is a graph showing the driving pressure of the conventional membrane filter, Figure 8 is a graph showing the driving pressure of the filtered water pressure control membrane filter device according to an embodiment of the present invention, Figure 9 is an embodiment of the present invention 10 is a block diagram illustrating a filtration process of a filtrate pressure controlled membrane filter device according to an example, and FIG. 10 is a filtrate pressure controlled membrane filter device according to an embodiment of the present invention. 11 is a block diagram illustrating a three step process, and FIG. 11 is a graph illustrating a comparison between a filtration flow rate and a backwash flow rate of a filtrate pressure controlled membrane filter device according to an embodiment of the present invention, and FIG. 12 is a filtrate water according to an embodiment of the present invention. A flow chart showing a membrane cleaning method for a pressure controlled membrane filter.
도 1 내지 도 3에 나타낸 바와 같이, 본 실시예에 의한 여과수 압력제어형 막여과장치는, 여과공급부, 막여과부, 여과배출부, 역세투입부, 역세배출부, 압력제어부, 유량제어부로 이루어져, 공급수를 분기하여 분리막에 의해 여과하는 막여과장치이다.As shown in Fig. 1 to Fig. 3, the filtered water pressure controlled membrane filter device according to the present embodiment includes a filtration supply part, a membrane filter part, a filtration discharge part, a backwash input part, a backwash discharge part, a pressure control part, a flow rate control part, It is a membrane filtration device which branches supply water and filters it by a separation membrane.
여과공급부는, 공급수를 각각의 막여과부의 분리막에 공급하도록 복수개로 분기된 분기관(1A, 1B, 1C, 1D, 1E)에 각각 설치된 공급수단으로서, 복수개의 여과공급밸브(11, 12, 13, 14, 15)와 복수개의 여과공급펌프(31, 32, 33, 34, 35)로 이루어져 있다.The filtration supply part is a supply means provided in each of the branch pipes 1A, 1B, 1C, 1D, and 1E which are divided into a plurality of branches so as to supply the feed water to the separation membrane of each membrane filtration part. 13, 14, 15) and a plurality of filtration feed pumps (31, 32, 33, 34, 35).
여과공급밸브(11, 12, 13, 14, 15)는 공급수의 저장조에서 각각의 막여과부로 공급수를 공급하기 위해 분기된 분기관(1A, 1B, 1C, 1D, 1E)에 각각 설치되며, 이와 같이 분기된 공급수를 각각 개폐하여 각각의 막여과부로 공급하게 된다. Filtration supply valves 11, 12, 13, 14, and 15 are respectively installed in branched pipes 1A, 1B, 1C, 1D, and 1E to supply the feed water from the reservoir to the respective membrane filters. In this way, the branched supply water is opened and closed to supply to each membrane filtration unit.
본 실시예의 여과공급밸브(11, 12, 13, 14, 15)는, 제1 여과공급밸브(11), 제2 여과공급밸브(12), 제3 여과공급밸브(13), 제4 여과공급밸브(14), 제5 여과공급밸브(15)의 5개의 여과공급밸브로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 여과공급밸브로 이루어지는 것도 가능함은 물론이다.The filtration supply valves 11, 12, 13, 14, and 15 of the present embodiment include a first filtration supply valve 11, a second filtration supply valve 12, a third filtration supply valve 13, and a fourth filtration supply. Although it consists of five filtration supply valves of the valve 14 and the 5th filtration supply valve 15, of course, it is also possible to consist of two to four and six or more filtration supply valves.
여과공급펌프(31, 32, 33, 34, 35)는 공급수의 저장조에서 각각의 막여과부로 공급수를 공급하기 위해 분기된 분기관(1A, 1B, 1C, 1D, 1E)에 각각 설치되되 여과공급밸브(11, 12, 13, 14, 15)의 하류에 설치되며, 이와 같이 여과공급밸브(11, 12, 13, 14, 15)를 통해 공급된 공급수를 각각 펌핑하여 각각의 막여과부로 공급하게 된다.Filtration feed pumps (31, 32, 33, 34, 35) are respectively installed in the branch pipe (1A, 1B, 1C, 1D, 1E) branched to supply the feed water to each membrane filter in the reservoir of the feed water. It is installed downstream of the filtration supply valves 11, 12, 13, 14, and 15, and thus each of the membrane filtration by pumping the feed water supplied through the filtration supply valves (11, 12, 13, 14, 15), respectively. To supply wealth.
본 실시예의 여과공급펌프(31, 32, 33, 34, 35)는. 제1 여과공급펌프(31), 제2 여과공급펌프(32), 제3 여과공급펌프(33), 제4 여과공급펌프(34), 제5 여과공급펌프(35)의 5개의 여과공급펌프로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 여과공급펌프로 이루어지는 것도 가능함은 물론이다.Filtration supply pumps 31, 32, 33, 34, 35 of the present embodiment. Five filtration supply pumps of the first filtration supply pump 31, the second filtration supply pump 32, the third filtration supply pump 33, the fourth filtration supply pump 34, and the fifth filtration supply pump 35. Of course, but it is also possible to consist of two to four and six or more filtration feed pump.
막여과부는, 각각의 여과공급부에 의해 공급된 공급수를 분리막에 의해 여과하는 복수의 분리막 여과기(61, 62, 63, 64, 65)로 이루어져 있다.The membrane filtration unit is composed of a plurality of separation membrane filters (61, 62, 63, 64, 65) for filtering the feed water supplied by each filtration supply unit with a separation membrane.
분리막 여과기(61, 62, 63, 64, 65)는 각각의 여과공급펌프(31, 32, 33, 34, 35)의 하류의 유입관에 설치되며, 각각의 여과공급펌프(31, 32, 33, 34, 35)에 의해 펌핑된 공급수를 분리막에 의해 여과하여 공급수에 포함된 오염물질을 여과하게 되며, 오염물질이 여과된 여과수를 하류로 배출하게 된다.Membrane filters 61, 62, 63, 64, 65 are installed in inlet pipes downstream of the respective filtration supply pumps 31, 32, 33, 34, 35, and respective filtration supply pumps 31, 32, 33. , 34, 35) to filter the feed water pumped by the separation membrane to filter the contaminants contained in the feed water, and discharge the filtered filtrate water downstream.
본 실시예의 분리막 여과기(61, 62, 63, 64, 65)는 제1 분리막 여과기(61), 제2 분리막 여과기(62), 제3 분리막 여과기(63), 제4 분리막 여과기(64), 제5 분리막 여과기(65)의 5개의 분리막 여과기로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 분리막 여과기로 이루어지는 것도 가능함은 물론이다.The membrane filters 61, 62, 63, 64, and 65 of the present embodiment may include a first membrane filter 61, a second membrane filter 62, a third membrane filter 63, a fourth membrane filter 64, and a second membrane filter 64. The five separator filters of the five separator filters 65, but of course it is also possible to consist of two to four and six or more membrane filters.
여과배출부는, 각각의 막여과부에서 처리된 여과수를 배출하는 복수의 여과배출밸브(81, 82, 83, 84, 85)로 이루어져 있다.The filtration discharge part is composed of a plurality of filtration discharge valves 81, 82, 83, 84, 85 for discharging the filtered water treated in each membrane filtration part.
여과배출밸브(81, 82, 83, 84, 85)는 각각의 막여과부에서 처리된 여과수를 배출하기 위해 막여과부의 하류에 설치된 배출관(30A, 30B, 30C, 30D, 30E)에 각각 설치되며, 이와 같이 배출된 여과수를 각각 개폐하여 막여과부로부터 배출하게 된다. Filtration discharge valves 81, 82, 83, 84, and 85 are respectively installed in discharge pipes 30A, 30B, 30C, 30D, and 30E downstream of the membrane filter part for discharging the filtered water from each membrane filter part. In addition, the filtered water discharged in this way is opened and closed to discharge from the membrane filtration unit.
본 실시예의 여과배출밸브(81, 82, 83, 84, 85)는, 제1 여과배출밸브(81), 제2 여과배출밸브(82), 제3 여과배출밸브(83), 제4 여과배출밸브(84), 제5 여과배출밸브(85)의 5개의 여과배출밸브로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 여과배출밸브로 이루어지는 것도 가능함은 물론이다.The filtration discharge valves 81, 82, 83, 84, and 85 of the present embodiment include a first filtration discharge valve 81, a second filtration discharge valve 82, a third filtration discharge valve 83, and a fourth filtration discharge valve. It consists of five filtration discharge valves of the valve 84 and the 5th filtration discharge valve 85, Of course, it is also possible to consist of two to four and six or more filtration discharge valves.
역세투입부는, 여과배출부의 하류에 접속되어 복수의 막여과부에서 배출된 여과수 저장을 위한 별도의 처리수 저장조를 두지 않고서 여과수의 일부를 복수의 막여과부 중 어느 하나의 막여과부로 역류시키는 투입수단으로서, 무동력의 압력팽창식 역세탱크(500), 역세수 밸브(600) 및 복수의 역세투입밸브(91, 92, 93, 94, 95)로 이루어져 있다.The backwashing section is connected to a downstream side of the filtration discharge section to input a portion of the filtrate to the membrane filtration section of any one of the plurality of membrane filtration sections without having a separate treatment water storage tank for storing the filtered water discharged from the plurality of membrane filtration sections. As a means, it consists of a non-powered pressure expansion backwash tank 500, the backwash valve 600, and the plurality of backwash injection valves 91, 92, 93, 94, 95.
압력팽창식 역세탱크(500)는, 도 4 내지 도 6에 나타낸 바와 같이 가스의 압력을 이용한 팽창과 수축에 의해 무동력으로 여과수를 유입 및 유출하는 역세용 여과수의 공급수단으로서, 가스조(510), 여과수조(520) 및 간막(530)으로 이루어져 있다.The pressure-expanded backwash tank 500 is a gas tank 510 as a supply means for backwashing filtrate which flows in and out of filtrate by non-power by the expansion and contraction using the pressure of gas, as shown in FIGS. It consists of a filtration water tank 520 and a membrane 530.
가스조(510)는, 가스가 일정 압력으로 유지되도록 밀폐된 저장조이고, 여과수조(520)는, 여과수 배출관에서 분기된 역세용 여과수 유입관에 설치되며 역세용 여과수가 유입 및 유출하도록 유입구(521)와 유출구(522)가 설치되어 있다.The gas tank 510 is a storage tank sealed to maintain the gas at a constant pressure, and the filtrate tank 520 is installed in the backwash filtrate inlet pipe branched from the filtrate discharge pipe, and the inlet port 521 so that the backwash filtrate flows in and out. ) And an outlet 522 are provided.
간막(530)은, 가스조(510)와 여과수조(520) 사이에 설치되어 이들의 공간을 구획하며, 이들 사이의 압력차이에 의해 가스조(510)의 방향이나 여과수조(520)의 방향으로 신축하도록 설치되어 있다.The diaphragm 530 is provided between the gas tank 510 and the filtration tank 520, and partitions these spaces, and the direction of the gas tank 510 or the direction of the filtration tank 520 is divided by the pressure difference therebetween. It is installed to stretch.
역세수 밸브(600)는, 여과수조(520)에 역세용 여과수의 유입을 개폐하도록 여과수 배출관에서 분기된 역세용 여과수 유입관에 설치된 밸브로서, 일부 막여과부의 역세를 위해 개방하게 된다.The backwash water valve 600 is a valve installed in the backwashing water inlet pipe branched from the filtrate discharge pipe so as to open and close the inflow of backwashing filtrate into the filtrate tank 520, and is opened for backwashing of some membrane filters.
따라서, 도 5에 나타낸 바와 같이 역세수 밸브(600)가 개방되어 유입구(521)를 통해서 여과수조(520)에 여과수가 유입되면, 여과수조(520)의 압력이 상승하여 간막(530)이 가스조(510)의 방향으로 팽창하게 되므로, 가스조(510)의 공간이 축소되어 가스를 수축시켜 압축하게 된다.Accordingly, as shown in FIG. 5, when the backwash valve 600 is opened and the filtrate flows into the filtrate tank 520 through the inlet 521, the pressure of the filtrate tank 520 rises and the membrane 530 becomes a gas. Since it expands in the direction of the tank 510, the space of the gas tank 510 is reduced to compress and compress the gas.
또한, 도 6에 나타낸 바와 같이 역세수 밸브(600)가 폐쇄되고 역세투입밸브가 개방되면, 여과수조(520)의 압력이 저하되어 간막(530)이 여과수조(520)의 방향으로 팽창하게 되므로, 가스조(510)의 공간이 확장되어 가스조(510)의 가스를 팽창시켜서 여과수조(520)로 유입된 여과수를 유출구(522)를 통해서 유출시키게 된다.In addition, as shown in FIG. 6, when the backwash valve 600 is closed and the backwash injection valve is opened, the pressure in the filtrate tank 520 is lowered, so that the membrane 530 expands in the direction of the filtrate tank 520. In addition, the space of the gas tank 510 is expanded to expand the gas of the gas tank 510 so that the filtered water introduced into the filtrate tank 520 flows out through the outlet 522.
역세투입밸브(91, 92, 93, 94, 95)는 각각의 막여과부에서 처리된 여과수를 복수의 막여과부 중 어느 하나의 막여과부로 역류시키기 위해 막여과부의 하류에 연결된 역세투입관(40A, 40B, 40C, 40D, 40E)에 각각 설치되며, 이와 같이 역류된 여과수를 각각 개폐하여 막여과부로 투입하게 된다.The backwash injection valves 91, 92, 93, 94, and 95 are backwashing pipes connected downstream of the membrane filtration unit in order to flow the filtered water treated in each membrane filtration unit to one of the plurality of membrane filtration units. 40A, 40B, 40C, 40D, and 40E), respectively, to open and close the backflow of the filtered water to be introduced into the membrane filtration unit.
본 실시예의 역세투입밸브(91, 92, 93, 94, 95)는, 제1 역세투입밸브(91), 제2 역세투입밸브(92), 제3 역세투입밸브(93), 제4 역세투입밸브(94), 제5 역세투입밸브(95)의 5개의 역세투입밸브로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 역세투입밸브로 이루어지는 것도 가능함은 물론이다.The backwash check valves 91, 92, 93, 94, 95 of the present embodiment include a first backwash check valve 91, a second backwash check valve 92, a third backwash check valve 93, and a fourth backwash check valve. Although the valve 94 and the five back check valves of the fifth back check valve 95 are composed of, two to four and six or more back check valves may be made.
역세배출부는, 각각의 막여과부에 연결되어 막여과부의 역세척시 막여과부에서 배출되는 역세처리수를 외부로 배출하는 복수의 역세배출밸브(21, 22, 23, 24, 25)로 이루어져 있다.The backwash discharge part comprises a plurality of backwash discharge valves 21, 22, 23, 24, and 25 connected to each membrane filter part and discharging the backwashing water discharged from the membrane filter part to the outside during back washing of the membrane filter part. have.
역세배출밸브(21, 22, 23, 24, 25)는 각각의 막여과부에서 역세된 역세처리수를 배출하기 위해 막여과부에 연결된 역세배출관(2A, 2B, 2C, 2D, 2E)에 각각 설치되며, 이와 같이 배출된 역세처리를 각각 개폐하여 막여과부로부터 외부로 배출하게 된다.The backwash discharge valves 21, 22, 23, 24, and 25 are respectively connected to the backwash discharge pipes 2A, 2B, 2C, 2D, and 2E connected to the membrane filter to discharge the backwashed backwashed water from the respective membrane filters. It is installed, and the backwashing discharged in this way is opened and closed to discharge from the membrane filter unit to the outside.
본 실시예의 역세배출밸브(21, 22, 23, 24, 25)는, 제1 역세배출밸브(21), 제2 역세배출밸브(22), 제3 역세배출밸브(23), 제4 역세배출밸브(24), 제5 역세배출밸브(25)의 5개의 역세배출밸브로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 역세배출밸브로 이루어지는 것도 가능함은 물론이다.The backwash discharge valves 21, 22, 23, 24, and 25 of the present embodiment include a first backwash discharge valve 21, a second backwash discharge valve 22, a third backwash discharge valve 23, and a fourth backwash discharge valve. Although it consists of five backwash discharge valves of the valve 24 and the 5th backwash discharge valve 25, of course, it is also possible to consist of two to four and six or more backwash discharge valves.
압력제어부는, 여과배출부의 하류에 설치되어 배출되는 여과수의 압력을 제어하여 일부 막여부과의 역세시 역세용 여과수에 적정한 압력을 제공하는 구성으로서, 압력측정수단, 압력제어수단 및 압력조절수단을 구비하고 있다.The pressure control unit is configured to control the pressure of the filtrate discharged and installed downstream of the filtration discharge unit to provide an appropriate pressure to the backwash filtrate during backwashing of some membrane filters, and includes a pressure measuring means, a pressure control means and a pressure adjusting means. Doing.
압력측정수단은 여과배출부의 하류에 설치되어 여과수의 압력을 측정하는 여과공정 압력센서(800)로 이루어져 있고, 압력제어수단은 압력측정수단에 접속되어 압력측정수단의 측정결과에 따라 압력제어신호를 제공하는 여과공정 압력제어기(810)로 이루어져 있고, 압력조절수단은 압력측정수단의 하류에 설치되어 압력제어수단의 압력제어신호에 의거해서 여과수의 압력을 조절하는 여과공정 압력조절밸브(100)로 이루어져 있는 것이 바람직하다.The pressure measuring means comprises a filtration process pressure sensor 800 which is installed downstream of the filtration discharge part and measures the pressure of the filtrate, and the pressure control means is connected to the pressure measuring means to generate a pressure control signal according to the measurement result of the pressure measuring means. It provides a filtration process pressure controller 810, the pressure regulating means is installed downstream of the pressure measuring means to the filtration process pressure control valve 100 for adjusting the pressure of the filtrate based on the pressure control signal of the pressure control means. It is preferable that it is made.
유량제어부는, 막여과부의 하류에 접속되어, 배출되는 여과수의 유량을 측정하여 여과공급부에 의해 막여과부로 공급되는 공급수의 유량을 제어하는 구성으로서, 제1 유량제어수단, 제2 유량제어수단, 유량제어수단, 유량조절수단을 구비하고 있다.The flow rate control unit is connected to the downstream of the membrane filtration unit, and measures the flow rate of the discharged filtered water to control the flow rate of the supply water supplied to the membrane filtration unit by the filtration supply unit, the first flow rate control means, the second flow rate control means And flow rate control means and flow rate control means.
제1 유량제어수단은, 막여과부의 하류에 접속되어 각 막여과부로부터 배출되는 여과수의 유량을 각각 측정하는 복수의 여과배출수 유량센서(71, 72, 73, 74, 75)로 이루어져 있다. The first flow control means comprises a plurality of filtered discharge water flow rate sensors 71, 72, 73, 74, 75 which are connected downstream of the membrane filter part and respectively measure the flow rate of the filtered water discharged from each membrane filter part.
본 실시예의 여과배출수 유량센서(71, 72, 73, 74, 75)는, 제1 여과배출수 유량센서(71), 제2 여과배출수 유량센서(72), 제3 여과배출수 유량센서(73), 제4 여과배출수 유량센서(74), 제5 여과배출수 유량센서(75)의 5개의 여과배출수 유량센서로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 여과배출수 유량센서로 이루어지는 것도 가능함은 물론이다.The filtration discharge water flow rate sensors 71, 72, 73, 74, and 75 of the present embodiment include a first filtration discharge water flow rate sensor 71, a second filtration discharge water flow rate sensor 72, a third filtration discharge water flow rate sensor 73, Although it consists of five filtration discharge water flow rate sensors of the 4th filtration discharge water flow rate sensor 74 and the 5th filtration discharge water flow rate sensor 75, it is a matter of course that it is also comprised from 2-4 pieces and 6 or more filtration discharge water flow rate sensors. .
제2 유량제어수단은, 여과배출부의 하류에 접속되어 전체 막여과부로부터 배출되는 전체 여과수의 유량을 측정하는 여과수 유량센서(700)로 이루어져 있다.The second flow control means comprises a filtrate flow rate sensor 700 which is connected downstream of the filtrate discharge portion and measures the flow rate of the total filtrate water discharged from the entire membrane filter portion.
유량제어수단은, 제1 유량측정수단 및 제2 유량측정수단에 연결되어 막여과부로 각각 공급되는 공급수의 유량을 제어하도록 제어신호를 제공하는 유량제어기(710)로 이루어져 있다.The flow rate control means is composed of a flow rate controller 710 connected to the first flow rate measuring means and the second flow rate measuring means and providing a control signal to control the flow rate of the supply water respectively supplied to the membrane filtration unit.
유량조절수단은, 여과공급부에 각각 연결되어 유량제어수단의 지령에 의해 각각의 막여과부로 공급되는 공급수의 유량을 조절하는 복수의 펌프회전수 제어기(41, 42, 43, 44, 45)로 이루어져 있다.The flow rate adjusting means is a plurality of pump speed controllers 41, 42, 43, 44, 45 which are respectively connected to the filtration supply part and regulate the flow rate of the feed water supplied to each membrane filter part by the command of the flow rate control means. consist of.
본 실시예의 펌프회전수 제어기(41, 42, 43, 44, 45)는, 제1 펌프회전수 제어기(41), 제2 펌프회전수 제어기(42), 제3 펌프회전수 제어기(43), 제4 펌프회전수 제어기(44), 제5 펌프회전수 제어기(45)의 5개의 펌프회전수 제어기로 이루어져 있으나, 2개 내지 4개 및 6개 이상의 펌프회전수 제어기로 이루어지는 것도 가능함은 물론이다.The pump speed controller 41, 42, 43, 44, 45 of the present embodiment includes a first pump speed controller 41, a second pump speed controller 42, a third pump speed controller 43, It consists of five pump speed controllers of the fourth pump speed controller 44 and the fifth pump speed controller 45, but of course, it is also possible to include two to four and six or more pump speed controllers. .
이러한 유량조절수단은, 일부 막여과부의 역세척시 나머지 막여과부의 여과수의 유량을 전체 막여과부의 여과수의 유량과 동일하게 유지되도록 나머지 막여과부로 공급되는 공급수의 유량을 조절하게 된다.The flow rate adjusting means adjusts the flow rate of the feed water supplied to the remaining membrane filter part so that the flow rate of the filtered water of the remaining membrane filter part is kept equal to the flow rate of the filtered water of the entire membrane filter part during back washing of some membrane filter parts.
또한, 본 실시예의 여과수 압력제어형 막여과장치의 후단에서 여과수를 처리하는 후단공정에는, 여과수 압력제어형 막여과장치의 하류에 설치된 후단공정 압력조절밸브(200), 후단공정 압력센서(900), 후단공정 압력제어기(910)에 의해 후단공정에 소요되는 여과수의 압력을 조절하는 것도 가능함은 물론이다.Further, in the rear end process of treating the filtrate at the rear end of the filtrate pressure controlled membrane filter of the present embodiment, the rear end process pressure regulating valve 200, the rear end pressure sensor 900, and the rear end installed downstream of the filtrate pressure controlled membrane filter are provided. Of course, it is also possible to adjust the pressure of the filtered water required for the post-stage process by the process pressure controller 910.
후단공정 압력조절밸브(200)는 후단공정의 하류에 설치되어 후단공정으로 유입되는 여과수의 압력을 조절하게 된다. 후단공정 압력센서(900)는, 후단공정의 상류에 설치되어 후단공정으로 유입되는 여과수의 압력을 측정하는 압력센서로 이루어져 있는 것이 바람직하다.The rear stage pressure control valve 200 is installed downstream of the rear stage to adjust the pressure of the filtered water flowing into the rear stage. The post-stage process pressure sensor 900 is preferably composed of a pressure sensor installed upstream of the post-stage process to measure the pressure of the filtered water flowing into the rear stage process.
후단공정 압력제어기(910)는, 후단공정 압력조절밸브(200)와 후단공정 압력센서(900)에 접속되어 후단공정 압력센서(900)의 측정결과에 따라 후단공정 압력조절밸브(200)의 개도를 조절하여 후단공정에 소요되는 여과수의 압력을 제어하도록 제어신호를 제공하게 된다.The after-stage process pressure controller 910 is connected to the after-stage process pressure control valve 200 and the after-stage process pressure sensor 900 to open the post-stage process pressure control valve 200 according to the measurement result of the after-stage process pressure sensor 900. By adjusting the control signal is provided to control the pressure of the filtered water required for the post-stage process.
따라서, 본 실시예의 여과수 압력제어형 막여과장치는, 도 7의 종래의 막여과장치의 구동압력 그래프에 나타낸 바와 같이 여과수 저류조로 인한 구동압력의 소실을 보강하기 위해 후단공정 공급펌프를 별도로 설치하던 문제를 해소한 것으로서, 도 8의 구동압력 그래프에 나타낸 바와 같이 무동력의 압력팽착식 역세탱크로 이루어진 압력제어부에 의한 압력제어에 의해 압력소실을 감소시켜 별도의 후단공정 공급펌프를 설치할 필요없이 여과수의 구동압력을 그대로 후단공정의 구동압력으로 이용할 수 있게 된다.Therefore, the filtrate pressure control membrane filter device of the present embodiment has a problem in that a post-stage process supply pump is separately installed to reinforce the loss of the driving pressure caused by the filtrate storage tank as shown in the driving pressure graph of the conventional membrane filter device of FIG. 7. In order to solve the problem, as shown in the driving pressure graph of FIG. 8, the pressure loss is reduced by the pressure control part made up of the non-powered pressure squeezed backwash tank, thereby driving the filtered water without installing a separate post process feed pump. The pressure can be used as the driving pressure of the post-stage process as it is.
또한, 도 9에 나타낸 바와 같이, 전체의 분리막 여과기의 여과공정에서 전체의 분리막 여과기의 여과유량은 총여과유량(Qt)과 역세유량(Qb)로 이루어지며, 각 분리막 여과기의 여과유량(q)은 총여과유량(Qt)과 역세유량(Qb)의 합(Qt+Qb)을 분리막 여과기의 갯수(n)로 나눈 값으로 이루어짐을 알 수 있다.In addition, as shown in FIG. 9, the filtration flow rate of the whole membrane filter in the filtration process of the whole membrane filter is composed of the total filtration flow rate (Q t ) and the backwash flow rate (Q b ), and the filtration flow rate of each membrane filter ( q) can be constituted by any it knows the value obtained by dividing the sum (Q t + Q b) of the total permeate flow rate (Q t) and the back washing flow rate (Q b) to the number (n) of the membrane filter.
또한, 도 10에 나타낸 바와 같이, 1개의 분리막 여과기의 역세공정에서 나머지의 각 분리막 여과기의 여과유량(q)은 총여과유량(Qt)을 나머지의 분리막 여과기의 갯수(n-1)로 나눈 값으로 이루어짐을 알 수 있다.In addition, as shown in FIG. 10, in the backwashing step of one separator filter, the filtration flow rate q of each remaining membrane filter is divided by the total filtration flow rate Q t by the number of remaining membrane filters n-1. It can be seen that it consists of a value.
또한, 도 11에 나타낸 바와 같이, 막여과장치의 분리막 여과기의 계열수에 따른 역세유량 분배비율을 나타낸 그래프에서는, 역세시 분리막에 부착된 오염물질의 효과적인 탈리를 위하여 역세유량은 각 계열당 여과유량(q)의 1∼3배(도 11에서의 a값)의 유량을 공급하고, 막여과장치는 역세시 소비되는 여과수의 유량을 추가적으로 여과할 수 있도록 2개 이상의 복수 계열의 분리막 여과기를 설치하여 측정한 것이다.In addition, as shown in Figure 11, in the graph showing the backwash flow rate distribution ratio according to the series number of the membrane filter of the membrane filter device, the backwash flow rate is the filter flow rate for each series for effective desorption of contaminants attached to the separation membrane during backwashing Supplying a flow rate of 1 to 3 times (q) (a value in Fig. 11), and the membrane filter unit is provided with two or more series of separation membrane filter to further filter the flow rate of the filtrate consumed during backwashing It is measured.
즉, 막여과장치의 총여과유량 대비 역세유량의 비율, 즉 역세유량분배비는 계열별 여과유량 대비 역세유량 배율, 즉 역세유량배수가 작을수록, 막여과장치의 계열수가 많을수록 낮으며 이는 막여과장치의 단위면적당 여과유량, 즉 투과플럭스가 낮아 막여과장치가 안정적으로 장기운전이 가능한 것을 의미한다.That is, the ratio of the backwash flow rate to the total filtration flow rate of the membrane filtration device, that is, the backwash flow rate distribution ratio, is lower as the backwash flow rate ratio, ie, the backwash flow rate multiplier is smaller, and the higher the number of series of the membrane filtration device. The low filtration flow rate per unit area, ie the permeate flux, means that the membrane filtration device can be stably operated for a long time.
그러나, 역세유량배수가 낮으면 분리막 역세시 막오염 물질의 탈리가 잘 되지 않아 분리막 성능회복률이 낮아질 수 있고, 투과플럭스가 너무 낮으면 다수의 분리막이 설치되어야 하므로 비경제적임을 의미한다.However, if the backwash flow rate is low, the membrane fouling material may not be easily removed during the backwash of the membrane, and the recovery performance of the membrane may be lowered. If the permeate flux is too low, it means that it is uneconomical because a plurality of membranes should be installed.
따라서, 도 11에서 막여과장치의 분리막 여과기의 계열수에 따른 역세유량 분배비율을 나타낸 그래프에 의하면 4∼10개의 분리막 여과기의 개열수에 대한 개열별 여과유량 대비 역세유량의 비율을 10∼40%로 유지하는 것이 바람직함을 알 수 있다.Therefore, according to the graph showing the backwash flow rate distribution ratio according to the series number of the membrane filter of the membrane filter in FIG. 11, the ratio of the backwash flow rate to the cleavage water of the cleavage water of 4 to 10 membrane filters is 10 to 40%. It can be seen that it is preferable to maintain as.
이하, 첨부도면을 참조하여 본 발명의 일실시예에 의한 여과수 압력제어형 막여과장치의 막세척방법을 더욱 상세히 설명한다. Hereinafter, the membrane washing method of the filtrate pressure controlled membrane filter device according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.
도 3 및 도 12에 나타낸 바와 같이, 본 실시예의 여과수 압력제어형 막여과장치의 막세척방법은, 일부의 여과공급부 및 여과배출부의 폐쇄단계(S10), 나머지의 여과공급부 및 여과배출부의 개방단계(S20), 여과수의 압력제어단계(S30), 일부의 역세투입부 및 역세배출부의 개방단계(S40), 나머지의 역세투입부 및 역세배출부의 폐쇄단계(S50), 공급수의 유량제어단계(S60)을 포함하여 이루어진다.As shown in Figure 3 and Figure 12, the membrane washing method of the filtered water pressure-controlled membrane filter device of the present embodiment, the closing step (S10) of some of the filtration supply and filtration discharge portion, the opening step of the remaining filtration supply and filtration discharge portion ( S20), the pressure control step of the filtered water (S30), the opening step of some backwashing and backwash discharge (S40), the closing step of the remaining backwashing and backwash discharge (S50), the flow rate control step of the feed water (S60) )
일부의 여과공급부 및 여과배출부의 폐쇄단계(S10)는 복수의 막여과부 중 어느 하나에 접속된 여과공급부와 여과배출부를 폐쇄하는 단계로서, 제1 여과공급밸브(11)와 제1 여과배출밸브(81)를 폐쇄하여 제1 분리막 여과기(61)의 여과공정을 정지하게 된다.Closing step (S10) of the part of the filtration supply unit and the filtration discharge unit is a step of closing the filtration supply unit and the filtration discharge unit connected to any one of the plurality of membrane filtration units, and the first filtration supply valve 11 and the first filtration discharge valve. Closing (81) closes the filtration process of the first membrane filter (61).
나머지의 여과공급부 및 여과배출부의 개방단계(S20)는 복수의 막여과부 중 나머지에 접속된 여과공급부와 여과배출부를 개방하는 단계로서, 제2 내지 제5 여과공급밸브(12, 13, 14, 15)와 제2 내지 제5 여과배출밸브(82, 83, 84, 85)를 개방하여 제2 내지 제5 분리막 여과기(62, 63, 64, 65)의 여과공정을 진행하게 된다.Opening of the remaining filtration supply unit and the filtration discharge unit (S20) is a step of opening the filtration supply unit and the filtration discharge unit connected to the rest of the plurality of membrane filters, the second to fifth filtration supply valves (12, 13, 14, 15) and the second to fifth filtration discharge valves 82, 83, 84, 85 are opened to perform the filtration process of the second to fifth separation membrane filters 62, 63, 64, 65.
여과수의 압력제어단계(S30)는 여과배출부에 접속된 압력제어부에 의해 여과수의 압력을 제어하는 단계로서, 여과공정 압력센서(800)의 측정결과에 따라 여과공정 압력조절밸브(100)의 개도를 조절하여, 일부 막여과부의 역세시 역세용 여과수에 적정한 압력을 제공하도록 여과수의 압력을 제어하게 된다.Pressure control step (S30) of the filtered water is a step of controlling the pressure of the filtered water by the pressure control unit connected to the filtration discharge unit, the opening degree of the filtration process pressure control valve 100 in accordance with the measurement result of the filtration process pressure sensor 800 The pressure of the filtrate is controlled to provide an appropriate pressure to the backwash filtrate during backwashing of some membrane filters.
일부의 역세투입부 및 역세배출부의 개방단계(S40)는 여과공급부와 여과배출부가 폐쇄된 막여과부에 접속된 역세투입부와 역세배출부를 개방하는 단계로서, 역세투입밸브(91)와 역세배출밸브(21)를 개방하여 제1 분리막 여과기(61)의 역세척공정을 진행하게 된다.The opening of the backwashing portion and the backwashing portion of the portion (S40) is a step of opening the backwashing portion and the backwashing portion connected to the membrane filtration portion in which the filtration supply portion and the filtration discharge portion are closed, and the backwashing valve 91 and the backwashing discharge The valve 21 is opened to perform the backwashing process of the first separator filter 61.
나머지의 역세투입부 및 역세배출부의 폐쇄단계(S50)는 나머지의 역세투입부와 역세배출부를 폐쇄하는 단계로서, 제2 내지 제5 역세투입밸브(92, 93, 94, 95)와 제2 내지 제5 역세배출밸브(22, 23, 24, 25)를 폐쇄하여 제2 내지 제5 분리막 여과기(62, 63, 64, 65)의 역세척공정을 정지하게 된다.The closing step S50 of the remaining backwashing unit and the backwashing unit is a step of closing the remaining backwashing unit and the backwashing unit, and the second to fifth backwashing valves 92, 93, 94, 95 and the second to fifth backwashing unit are closed. The fifth backwash discharge valves 22, 23, 24, and 25 are closed to stop the backwashing process of the second to fifth separator filters 62, 63, 64, and 65.
공급수의 유량제어단계(S60)는 일부 막여과부의 역세시 나머지 막여과부의 여과수의 유량을 전체 막여과부의 여과수의 유량과 동일하게 유지되도록, 나머지 막여과부로부터 배출되는 여과수의 유량을 측정하여 각각의 막여과부로 공급되는 공급수의 유량을 제어하는 단계로서, 나머지의 막여과부로부터 배출되는 여과수의 유량을 여과수 유량센서(700)로 측정하여 유량제어기(710)에 의해 나머지의 막여과부로 공급수의 유량을 제어하도록 제어신호를 제공하고, 이 제어신호에 의해 제2 내지 제5 펌프회전수 제어기(42, 43, 44, 45)가 제2 내지 제5 여과공급펌프(32, 33, 34, 35)를 제어하여 제2 내지 제5 분리막 여과기(62, 63, 64, 65)로 공급되는 공급수의 유량을 조절하게 된다.Supply flow rate control step (S60) by measuring the flow rate of the filtered water discharged from the remaining membrane filtration unit to maintain the flow rate of the filtration water of the remaining membrane filtration unit during the backwash of some membrane filtration unit, the same as the flow rate of the filtration water of the whole membrane filtration unit Controlling the flow rate of the feed water supplied to each membrane filtration unit, by measuring the flow rate of the filtered water discharged from the remaining membrane filtration unit with the filtered water flow sensor 700 to the remaining membrane filtration unit by the flow controller 710 A control signal is provided to control the flow rate of the feed water, and the second to fifth pump speed controllers 42, 43, 44, and 45 are used to control the second to fifth filtration supply pumps 32, 33, 34 and 35 are controlled to adjust the flow rate of the feed water supplied to the second to fifth separator filters 62, 63, 64, and 65.
이상 설명한 바와 같이, 본 발명에 따르면 막여과공정에서 여과된 여과수의 일부를 역류시켜 역세수로 이용하고 역세용 여과수의 압력을 제어함으로써, 막여과장치에서 처리수 저장조가 불필요하여 이로 인해 공간효율성을 높일 수 있고 역세용 여과수의 압력을 제어하여 역세효율을 향상시킬 수 있는 효과를 제공한다.As described above, according to the present invention, a portion of the filtered water filtered in the membrane filtration process is used as a backwash water and the pressure of the backwashing filtrate is controlled, thereby eliminating the need for a treated water storage tank in the membrane filtration device. It can increase and control the pressure of the backwashing filtrate to provide the effect of improving the backwashing efficiency.
또한, 막여과부의 하류에 유량제어부를 설치하여 공급수와 여과수의 유량을 제어함으로써, 일부 분리막의 역세시에도 후단공정에 동일한 여과수의 유량을 제공할 수 있게 된다.Further, by installing a flow rate control unit downstream of the membrane filtration unit to control the flow rates of the feed water and the filtered water, it is possible to provide the same flow rate of the filtered water to the post-stage process even when backwashing some of the separation membranes.
또한, 역세투입부로 무동력의 압력팽창식 역세탱크를 사용함으로써, 별도의 조작없이 역세용 여과수의 투입을 제어할 수 있고, 여과배출부의 하류에 압력제어부를 설치하여 여과수의 압력을 제어함으로써, 별도의 조작없이 역세용 여과수의 압력을 제어할 수 있는 효과를 제공한다.In addition, by using a non-powered pressure-expandable backwash tank as a backwashing inlet, it is possible to control the input of backwashing filtrate without any separate operation, and by installing a pressure control unit downstream of the filtration outlet to control the pressure of the filtrate. Provides the effect of controlling the pressure of the backwash filtrate without manipulation.
또한, 막여과공정의 여과수의 압력을 소실시키지 않고, 후단공정에 이용하며 후단공정의 공급측 압력 요구조건에 따라 막여과공정의 여과수측 압력을 독립적으로 임의제어 함으로써, 전체 수처리공정의 에너지 효율을 증가시킬 수 있는 효과를 제공한다.In addition, it is possible to increase the energy efficiency of the entire water treatment process by controlling the filtration water side pressure of the membrane filtration process independently and arbitrarily according to the supply side pressure requirements of the post-stage process without losing the pressure of the filtered water of the membrane filtration process. It provides the effect.
이상 설명한 본 발명은 그 기술적 사상 또는 주요한 특징으로부터 벗어남이 없이 다른 여러 가지 형태로 실시될 수 있다. 따라서 상기 실시예는 모든 점에서 단순한 예시에 지나지 않으며 한정적으로 해석되어서는 안 된다.The present invention described above can be embodied in many other forms without departing from the spirit or main features thereof. Therefore, the above embodiments are merely examples in all respects and should not be interpreted limitedly.
본 발명은 막여과장치에 분리막 역세척 및 여과수 저장을 위한 별도의 처리수 저장조를 두지 않고서 막여과공정에서 처리된 여과수의 일부를 분리막의 역세척수로 이용하는 여과수 압력제어형 막여과장치 및 그의 막세척방법을 제공한다.The present invention provides a filtered water pressure controlled membrane filter device and a membrane cleaning method using a portion of the filtered water treated in the membrane filtration process as a backwash water of the membrane without providing a separate treated water storage tank for backwashing the membrane and storing the filtered water in the membrane filtration device. To provide.

Claims (5)

  1. 공급수를 분기하여 분리막에 의해 여과하는 막여과장치로서,A membrane filter device for branching feed water and filtering by a separation membrane,
    분기된 공급수를 각각의 분리막에 공급하는 복수의 여과공급부;A plurality of filtration supplies for supplying branched feed water to each separator;
    상기 각각의 여과공급부에 의해 공급된 공급수를 분리막에 의해 여과하는 복수의 막여과부; A plurality of membrane filtration sections for filtering the feed water supplied by the respective filtration supplies by a separation membrane;
    상기 각각의 막여과부에서 처리된 여과수를 배출하는 복수의 여과배출부; A plurality of filter discharge parts for discharging the filtered water treated in each of the membrane filter parts;
    상기 여과배출부의 하류에 접속되어 상기 여과배출부에서 배출되는 여과수를 저장하지 않고서 여과수의 일부를 상기 막여과부로 역류시켜 분리막을 역세척하는 역세투입부; A backwashing unit connected to a downstream side of the filtration discharge unit and backwashing a separation membrane by flowing a part of the filtration water to the membrane filtration unit without storing the filtration water discharged from the filtration discharge unit;
    상기 각각의 막여과부에 연결되어 상기 막여과부의 역세척시 역세처리수를 외부로 배출하는 역세배출부; A backwash discharge part connected to each of the membrane filter parts to discharge backwash water to the outside during backwashing of the membrane filter part;
    상기 여과배출부의 하류에 설치되어 여과수의 압력을 제어하는 압력제어부; 및 A pressure control unit installed downstream of the filtration discharge unit to control the pressure of the filtrate; And
    상기 막여과부의 하류에 접속되어, 배출되는 여과수의 유량을 측정하여 상기 여과공급부에 의해 상기 막여과부로 공급되는 공급수의 유량을 제어하는 유량제어부;를 포함하고, And a flow rate control unit connected to a downstream side of the membrane filtration unit to measure a flow rate of the filtered filtration water to control a flow rate of the feed water supplied to the membrane filtration unit by the filtration supply unit.
    상기 유량제어부는, 일부 막여과부의 역세시 나머지 막여과부의 여과수의 유량을 전체 막여과부의 여과수의 유량과 동일하게 유지되도록 나머지 막여과부로 공급되는 공급수의 유량을 조절하고, The flow rate control unit adjusts the flow rate of the feed water supplied to the remaining membrane filter portion so that the flow rate of the filtered water of the remaining membrane filter portion at the time of backwashing of the membrane filter portion of the partial membrane filter to be the same as the flow rate of the filtered water of the whole membrane filter portion,
    상기 압력제어부는, 상기 역세투입부에 제공되는 여과수의 압력을 제어하는 여과공정 압력제어부와, 여과공정에서 배출되는 여과수의 구동압력을 후단공정의 구동압력으로 이용하도록 상기 여과공정 압력제어부의 하류에 설치되어 후단공정에 제공되는 여과수의 압력을 제어하는 후단공정 압력제어부로 이루어져 있는 것을 특징으로 하는 여과수 압력제어형 막여과장치.The pressure control part includes a filtration step pressure control part for controlling the pressure of the filtration water provided to the backwashing injection part, and a downstream of the filtration step pressure control part so as to use the driving pressure of the filtration water discharged from the filtration step as a driving pressure of the subsequent step. Filtrate pressure control type membrane filter device, characterized in that consisting of the post-stage process pressure control unit for controlling the pressure of the filtrate is provided in the post-stage process.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 역세투입부는, The backwashing unit,
    가스가 일정 압력으로 유지되는 가스조와, 여과수가 유출입하는 여과수조와, 상기 가스조와 상기 여과수조 사이에 이들의 구획공간을 신축하도록 설치된 간막으로 이루어진 압력팽창식 역세탱크; A pressure-expandable backwash tank composed of a gas tank in which gas is maintained at a constant pressure, a filtration water tank into which filtered water flows in and out, and a partition installed between the gas tank and the filtration water tank to expand and contract a partition space thereof;
    여과수의 일부가 역류되어 상기 여과수조에 유입되도록 상기 여과배출부의 하류에 연결된 여과수 유입관에 설치된 역세수 밸브; 및A backwash water valve installed in the filtered water inlet pipe connected downstream of the filtered discharge part so that a portion of the filtered water flows back to the filtered water tank; And
    상기 여과수조로부터 여과수가 배출되어 상기 각각의 막여과부로 투입되도록 분기된 역세투입관에 각각 설치된 복수의 역세투입밸브;로 이루어져 있는 것을 특징으로 하는 여과수 압력제어형 막여과장치.Filtrate pressure control membrane filter device, characterized in that consisting of; a plurality of backwash injection valves respectively installed in the backwashing discharge pipe branched to be discharged from the filtrate tank to be introduced into each of the membrane filtration unit.
  3. 제 1 항에 있어서, The method of claim 1,
    상기 여과공정 압력제어부는, 상기 여과배출부의 하류에 설치되어 여과수의 압력을 측정하는 압력측정수단; 상기 압력측정수단에 접속되어 상기 압력측정수단의 측정결과에 따라 압력제어신호를 제공하는 압력제어수단; 및 상기 압력측정수단의 하류에 설치되어 상기 압력제어수단의 압력제어신호에 의거해서 여과수의 압력을 조절하는 압력조절수단;을 구비하고, The filtration process pressure control unit, the pressure measuring means is installed downstream of the filtration discharge unit for measuring the pressure of the filtered water; Pressure control means connected to said pressure measuring means for providing a pressure control signal in accordance with the measurement result of said pressure measuring means; And a pressure regulating means installed downstream of the pressure measuring means to adjust the pressure of the filtrate based on the pressure control signal of the pressure controlling means.
    상기 후단공정 압력제어부는, 상기 후단공정의 상류에 설치되어 유입되는 여과수의 압력을 측정하는 후단공정 압력센서; 상기 후단공정 압력센서에 접속되어 상기 후단공정 압력센서의 측정결과에 따라 압력제어신호를 제공하는 후단공정 압력제어기; 및 상기 후단공정의 하류에 설치되어 상기 후단공정 압력제어기의 압력제어신호에 의거해서 유입되는 여과수의 압력을 조절하는 후단공정 압력조절밸브;를 구비하는 것을 특징으로 하는 여과수 압력제어형 막여과장치.The post-stage process pressure control unit may include: a post-stage process pressure sensor installed at an upstream side of the post-process to measure the pressure of the filtered water; A post process pressure controller connected to the post process pressure sensor to provide a pressure control signal according to a measurement result of the post process pressure sensor; And a post-stage process pressure regulating valve installed downstream of the post-stage process to adjust the pressure of the filtered water introduced based on the pressure control signal of the post-stage process pressure controller.
  4. 제 1 항에 기재된 여과수 압력제어형 막여과장치의 막세척방법으로서, Membrane washing method of the filtrate pressure controlled membrane filter device according to claim 1,
    복수의 막여과부 중 어느 하나에 접속된 여과공급부와 여과배출부를 폐쇄하는 단계;Closing the filtration supply unit and the filtration discharge unit connected to any one of the plurality of membrane filtration units;
    복수의 막여과부 중 나머지에 접속된 여과공급부와 여과배출부를 개방하는 단계;Opening a filtration supply part and a filtration discharge part connected to the rest of the plurality of membrane filtration parts;
    상기 여과배출부에 접속된 압력제어부에 의해 여과수의 압력을 제어하는 단계; 및 Controlling the pressure of the filtered water by a pressure control unit connected to the filtration discharge unit; And
    상기 여과공급부와 여과배출부가 폐쇄된 막여과부에 접속된 역세투입부와 역세배출부를 개방하고, 나머지의 역세투입부와 역세배출부를 폐쇄하는 단계;를 포함하는 것을 특징으로 하는 여과수 압력제어형 막여과장치의 막세척방법.Filtrate water pressure controlled membrane filtration comprising the step of opening the backwashing and the backwashing discharge portion connected to the membrane filtration unit with the filtration supply and the filtration discharge portion closed, and closing the remaining backwashing portion and the backwashing discharge portion; How to clean the device.
  5. 제 4 항에 있어서, The method of claim 4, wherein
    상기 일부 막여과부의 역세시 나머지 막여과부의 여과수의 유량을 전체 막여과부의 여과수의 유량과 동일하게 유지되도록, 나머지 막여과부로부터 배출되는 여과수의 유량을 측정하여 상기 각각의 막여과부로 공급되는 공급수의 유량을 제어하는 단계를 더 포함하는 것을 특징으로 하는 여과수 압력제어형 막여과장치의 막세척방법.In order to maintain the flow rate of the filtration water of the remaining membrane filtration part at the same time as the membrane filtration part is backwashed, the flow rate of the filtration water discharged from the remaining membrane filtration part is measured and supplied to each membrane filtration part. Membrane cleaning method of the filtered water pressure controlled membrane filter device further comprising the step of controlling the flow rate of the water.
PCT/KR2013/004017 2012-08-03 2013-05-08 Controlled filtered water pressure membrane filtration apparatus and membrane-cleaning method therefor WO2014021541A1 (en)

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