KR100925680B1 - Immersion type membrane filtration water treatment device using automatic water level control - Google Patents

Abstract

The present invention relates to a low-power submerged membrane filtration using a water level braking control sluice. A screen 8 installed inside the raw water inlet pipe 7 for filtering the suspended substances of raw water; A coagulant input pipe into which a coagulant is injected to agglomerate the raw water filtered by the suspended solids in the screen (8); An agglomeration tank 11 adjacent to one side of the first membrane filtration tank 1 to improve coagulation efficiency by adjusting pH; A first membrane filtration tank 1 adjacent to one side of the coagulation tank 11 and having an immersion type separation membrane 15 installed therein to filter raw water; A second membrane filtration tank (2) adjacent to one side of the first membrane filtration tank (1) and having an immersion type separation membrane (15) installed therein to purify raw water transferred from the first membrane filtration tank (1); A hydrologic gate installed at an upper wall of the condensing tank 11 and the first membrane filtration tank 1 and adjacent wall surfaces of the first membrane filtration tank 1 and the second membrane filtration tank 2 to move raw water by a natural runoff principle; An activated carbon tower 14 connected to the first membrane filtration tank 1 and the second membrane filtration tank 2 to move the membrane filtration water 13 through a filtration pump; Low power immersion type using a water level braking control hydrology consisting of; discharge pipe (16) installed at the lower end of the second membrane filtration tank (2) to discharge the untreated raw water concentrated during operation It is about.

In this way, the raw water supply from the first stage to the second stage through the pump (pump) in the immersion membrane filtration process of the conventional immersion type advanced water purification treatment system is the coagulation tank 11 and the membrane filtration tank 1 According to the submerged membrane operating conditions, the water level automatic control gate connected to the integrated automatic control device is installed between the stages and the stage 2, and the pump of the prior art is removed to reduce the initial investment cost, such as piping generated by the pump installation, and to eliminate the pump. The energy consumption can be optimized by minimizing required land area and reducing maintenance costs.

Description

Apparatus for water treatment using membrane filtration automatically level controlled floodgates

The present invention relates to a low-power submerged membrane filtration water purification apparatus using a water level braking control sluice, and more particularly, a pipe related to a pump by installing an automatic water level control sluice between the first and second stages and removing the pump of the prior art. The present invention relates to a low-power submerged membrane filtration water purification system using a water level braking control hydrology that can reduce initial investment costs such as valves, flowmeters, etc., minimize the required land area by eliminating pumps, and optimize energy consumption by reducing maintenance costs.

Since the immersion membrane is directly immersed in the water tank without the pressure vessel used for the pressure separation membrane, there is no need for a separate space for the membrane system, and the suction membrane is sucked only as much as the throughput by the vacuum pressure of the filtration pump. Although it has the advantage of low land area and power cost, there are limitations on power cost and installation location using multiple pumps. Membrane filtration operation using the natural flow method has the advantage of reducing the power cost and initial investment cost, while the intake source and the membrane filtration water treatment system can be applied to form the artificial structure by gravity type in order to apply the principle of gravity natural discharge. There is a way to use the terrain.

Gravity man-made structures generally require pumping from the intake source to the landing well, and the man-made structure reduces maintenance costs while increasing initial investment. In case of using the natural topography, since the water source is generally in the lowlands, the application of the technology is limited, transfer of the pump to the landing well is required, and a lot of restrictions are attached to the system installation.

In the flat condition where membrane filtration water treatment system is generally installed, the natural flow method is implemented by adjusting the water level of each reactor and controlling the water gate opening and closing according to membrane filtration operation. By improving the initial investment cost and minimizing energy consumption, the maintenance cost can be optimized.

The present invention relates to a low power immersion type membrane filtration water purification apparatus using a water level braking control hydrology, in order to improve the disadvantages of the existing high water treatment system, a coagulation tank (11), a membrane filtration irradiation, and a first membrane filtration tank (1). By installing a water gate between the membrane and the second membrane filtration tank (2), it is possible to minimize the related pipe cost that can be caused by installing the pump using the natural flow principle, reduce the required land area, reduce the initial investment cost, and minimize the energy consumption. The present invention is to provide a low power immersion membrane filtration water treatment device using a water level braking control gate that can reduce maintenance costs.

In order to solve the above technical problem, the present invention is installed in the raw water inlet pipe and the raw water inlet pipe (7), the screen 8 and the screen 8 for filtering the suspended substances in the raw water The flocculation tank 11 and the flocculation tank 11 which improve the flocculation efficiency by adjusting pH adjacent to one side of the flocculant input pipe and the first membrane filtration tank 1 into which flocculant is injected to floculate the filtered raw water. 11) and the first membrane filtration tank (1) and the first membrane filtration tank (1) for filtering the raw water is provided adjacent to one side and the inside is immersed separation membrane (15) Is installed to purify the raw water transferred from the first membrane filtration tank 1, the second membrane filtration tank 2, the coagulation tank 11, the first membrane filtration tank (1) and the first membrane filtration tank (1) and the first It is installed on the upper side of the adjacent wall of the two membrane filtration tanks (2) to collect the raw water according to the natural discharge principle. The activated carbon tower 14 and the second membrane filtration tank 2, which are connected to the first gate filtration tank 1 and the second membrane filtration tank 2, respectively, through which the membrane filtration water 13 is moved through a filtration pump. It can be solved through a low-power submerged membrane filtration device using a water level braking control hydrology installed in the lower end of the discharge pipe 16 which discharges untreated raw water concentrated during operation.

In addition, the step of injecting the flocculant into the raw water, the step of filtering the large suspended particles through the screen (8) before mixing with the introduced flocculant, the step of mixing the raw water and the flocculant in the inline mixer 17 and the inline mixer The coagulation efficiency is improved by adjusting the pH through the coagulation tank 11 between the 17 and the first membrane filtration tank 1, and the flocculation efficiency is increased and the raw water passes through the separation membrane in the first membrane filtration tank 1 and floats. Filtering the material and forcibly sucking the raw water of the membrane filtration tank through the first stage filtration pump (5) and transporting it to the activated carbon tower (14) and between the first membrane filtration tank (1) and the second membrane filtration tank (2). Installing a hydrology and transferring the untreated raw water in which the untreated floating material is partially concentrated in the first membrane filtration tank (1) to the second membrane filtration tank (2) on the principle of natural flow by gravity through the inflow pipe and the first membrane Through a second membrane filtration tank (2) adjacent to the filtration tank (1) Filtration of raw water and the immersion membrane through the two-stage filtration pump (6) to communicate the separation membrane and activated carbon tower (14) and forcibly sucked raw water of the membrane filtration tank to transfer to the activated carbon tower (14) and the raw water A backwashing step of desorbing the adsorption floc that can be attached to the immersion type separation membrane (15) and a discharge step of discharging the predetermined concentrated untreated raw water into the discharge pipe (16) formed at the lower end of the second membrane filtration tank (2). And through the low-power immersion type membrane filtration method using the water level braking control hydrology comprising the step of disinfecting, purifying and supplying the raw water collected by the activated carbon tower 14 through the granular activated carbon filter applied to the activated carbon tower 14. I can solve it.

In order to improve the shortcomings of the existing advanced water treatment system, the water pipe is installed between the first membrane filtration tank (1) and the second membrane filtration tank (2) to reduce the related piping cost which may be caused by installing the pump using the natural flow principle. The initial investment can be reduced by minimizing and reducing the required area, and maintenance costs can be reduced by minimizing energy consumption.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of devices of the present invention.

A coagulant is installed inside the raw water inflow pipe and the raw water inflow pipe 7 through which raw water is introduced to filter the suspended solids of the raw water, and the flocculant to agglomerate the filtered raw water from the screen 8. The flocculation tank 11 and the coagulation tank 11 which improve the coagulation efficiency by adjusting pH near one side and the coagulant input pipe and the first membrane filtration tank 1 which are injected are adjacent to one side and the immersion type separation membrane inside the coagulation tank 11. (15) is provided to adjoin the first membrane filtration tank (1) and the first membrane filtration tank (1) to filter the raw water, and an immersion type separation membrane (15) is provided inside the first membrane filtration tank (1). Installed on the upper side of the second membrane filtration tank (2), the coagulation tank (11), the first membrane filtration tank (1), and the adjacent membrane surface of the first membrane filtration tank (1) and the second membrane filtration tank (2) for purifying the transferred raw water. And the first membrane filtration tank (1) and the second membrane filtration to move the raw water according to the natural descent principle. (2) and the discharge pipe which is connected to each of the pipes and installed in the lower end of the activated carbon tower 14 and the second membrane filtration tank (2) through which the membrane filtration water (13) moves through the filtration pump to discharge the untreated raw water concentrated during operation ( 16) and an acid pipe 12 installed at the lower ends of the first membrane filtration tank 1 and the second membrane filtration tank 2 to desorb adsorptive suspended matter of the separation membrane.

When raw water is supplied through the inlet pipe through the above apparatus, large suspended particles are primarily filtered through the screen 8. The flocculant is added at the same time as the filtering. Injected raw water and flocculant are passed through the in-line admixture 17 to increase the flocculation efficiency, so that the fine particles are aggregated into large particles. The agglomerated mixture mixed through the in-line admixture 17 is transferred to the coagulation tank 11 to be coagulated by stirring.

The raw water aggregated by the coagulation tank 11 is then moved to the first membrane filtration tank 1 by the water gate # 1 (3) provided at the upper end portion. Using the principle of natural flow, it naturally moves by gravity.

The raw water moved to the first membrane filtration tank 1 is filtered through the filtration pump in the first membrane filtration tank 1 to filter the suspended solids, and air is supplied to the bottom of the membrane through the diffuser 12 to separate the membrane. The adsorption suspension of is desorbed.

In addition, the raw water in which the suspended solids are concentrated in the first membrane filtration tank 1 is transferred to the second membrane filtration tank 2 through hydrology # 2 (4) for treatment, and the first membrane filtration tank 1 and the second membrane filtration tank are processed. Between the membrane filtration tank (2) by installing the automatic water level control # 2 (4) associated with the water level level sensor, unlike the prior art, it is naturally transported by gravity using the principle of natural flow. Through this, it is possible to reduce the initial investment cost by reducing the related piping cost and the required area, and to reduce the maintenance cost by reducing energy consumption. The present invention can maintain the operation of the device by discharging the internal concentrated water of the second membrane filtration tank 2 of high concentration within the range of 2 to 3% by volume of the total influent water through the discharge pipe 16.

Finally, the raw water filtered in the first membrane filtration tank (1) and the second membrane filtration tank (2) is supplied through the activated carbon tower 14 after treatment with a small amount of organic harmful substances through disinfection.

The present invention is to replace the conventional pump using the electric energy through the installation of the hydrology using the principle of the natural load through the gravity energy without the need of a separate energy source coagulation tank 11 and the first membrane filtration tank (1) and The second membrane filtration tank (2) was to be transferred through the inlet pipe of the hydrologic. The sluice gate is interlocked with the water level sensor in the filtration and backwashing operation conditions of the present invention, the sluice gate is automatically controlled by the MMI (Man Machine Interface).

The MMI (Man Machine Interface) is also called HMI (Man Machine Interface), and it is called MMI with a device or function that helps people and machines to communicate with each other. Computers, programs, and peripherals with functions of giving, recording, and warning are referred to as MMI. Through this, the water gate is automatically adjusted to use the natural flow principle during filtration and the open water level is determined in the coagulation tank 11 so as to prevent backflow into the coagulation tank 11 above the elevated level during backwashing. The open water level of the filtration tank is set and adjusted to be lower than the open water level of the coagulation tank 11 and the associated membrane filtration gate.

2 is a real 3D solid structure of the present invention.

In order to adjust the water gate installed in the present invention by installing the water gate opening and closing handles to use the principle of natural flow, as well as the water level level sensor to manually control the water gate opening and closing handle.

Unlike other existing technologies, the present invention can be applied to general terrain without using any special terrain conditions in using the principle of natural inheritance. In addition, in the case of a gravity filtration device using an artificial structure requires a separate equipment and structure from the intake source, the initial cost is high, but the present invention can be filtered in one place and the need for a separate device even when using the natural discharge principle It can be used without any cost and no additional site is required at the beginning, so it is possible to optimize the maintenance cost by improving the initial investment cost and minimizing the energy consumption.

The embodiment of the present invention is embodied through the following examples.

<Example>

The flux of the pilot plant with a processing capacity of 550 / day operating in the immersion membrane filtration water treatment facility in Guui water purification plant in Seoul is 0.90 / day for the first stage and 0.45 / day for the two stage. The filtration and backwash cycles are 15 minutes / 30 seconds and the maintenance wash is performed once a day.

The membrane filtration water treatment system is controlled by the MMI (Man Machine Interface) by the integrated automatic controller logic. Each flow rate is detected by the water level sensor installed in the membrane filtration tank. The hydrostatic level is linked to the MMI during cleaning, backwashing and maintenance by the sensed water level sensor.

1. Operating conditions of floodgate

division water gate( Gate ) # 1 (3) water gate( Gate ) # 2 (4)  Installation location  Agglomeration → 1 stage membrane filtration tank  1-stage membrane filtration tank → 2-stage membrane filtration tank  Open Level  2,650 mm  2,450 mm  Close level  3,000 mm  3,000 mm

2. How to operate

Condition Driving method Remarks water gate( Gate ) # 1 (3) water gate( Gate ) # 2 (4)  1/2 steps  2,650  2,450  1 step backwash  2,650  2,650  No inflow of raw water  1 stage maintenance  3,000  3,000  No inflow of raw water  2-stage backwash  2,650  2,650  2-stage maintenance cleaning  2,650  2,650

In order to apply the gravity natural loading principle within the membrane filtration general structure, not the gravity natural loading formed by the artificial structure, the open water level of the sluice # 1 (3) is 2650 mm, considering the 90 mm increased during the first stage backwashing. Is determined and backflow into the coagulation bath 11 is prevented. The open level of sluice # 2 (4) is determined between 2490 mm, the low level of the first stage membrane, and 2400 mm, the high level of the two stage membrane. The close water level of sluice # 1 (3) and sluice # 2 (4) is 3000 considering water level rising at the time of maintenance cleaning in stage 1 and 360 mm rising at the time of maintenance cleaning and 2550 mm, the first level membrane filtration tank. set to mm. At 15 minutes and 30 seconds backwash, the opening and closing of the gate is operated in conjunction with the MMI of the submerged membrane filtration integrated automatic control system by the level sensor. Thus, the direction of operation of the doorway structure of the gate is driven from the bottom up, unlike the direction of the normal gate.

3. Analysis of power consumption according to operating conditions (550 tons / day, gu water purification plant)

 Control method  Power Consumption (kWh / d) 550m ³ / d 25000m ³ / d  In typical continuous acid application  92.8  4225 When applying automatic control diffuser method *  70.5  3200  When applying automatic control diffuser and low drop gravity hydraulic  67.5  3075

* The automatic controlled diffuser method is a mixture of the existing continuous diffuser method and intermittent diffuser method. It is a separator air cleaning technology that applies the intermittent diffuser method during low turbidity operation period and the continuous diffuser type during high turbidity operation period.

Based on the Yeongdeungpo Membrane Filtration Plant's 2,500 / d standard, the automatic control and low drop gravitational hydrophobic system were applied to the 2,500 / d standard, resulting in a 1150 kWh / day reduction.

1 is a block diagram of devices of the present invention

2 is an actual device diagram of the present invention.

<Description of the symbols for the main parts of the drawings>

1: 1st membrane filtration tank

2: 2nd membrane filtration tank

3: sluice # 1

4: sluice # 2

5: 1 stage filtration pump

6: two stage filtration pump

7: raw water inflow pipe

8: screen

9: flocculant injection tube

10: pH adjustment

11: coagulation tank

12: diffuser

13: membrane filter

14: activated carbon tower

15: immersion membrane

16: discharge pipe

17: in-line admixture

Claims (6)

Raw water inflow pipe 7 through which raw water flows; A screen 8 installed inside the raw water inlet pipe 7 for filtering the suspended substances of raw water; A coagulant inlet tube (9) into which a coagulant is introduced to agglomerate the raw water filtered out of the suspended solids in the screen (8); An inline mixer 17 connected to the raw water inlet pipe and the coagulant inlet pipe to mix the raw water and the coagulant; An agglomeration tank 11 adjacent to one side of the first membrane filtration tank 1 to improve coagulation efficiency by adjusting pH; A first membrane filtration tank 1 adjacent to one side of the coagulation tank 11 and having an immersion type separation membrane 15 installed therein to filter raw water; A second membrane filtration tank (2) adjacent to one side of the first membrane filtration tank (1) and having an immersion type separation membrane (15) installed therein to purify raw water transferred from the first membrane filtration tank (1); A hydrologic gate installed at the top of the adjacent wall surface of the coagulation tank 11 and the first membrane filtration tank 1 and the first membrane filtration tank 1 and the second membrane filtration tank 2 to move the raw water according to a natural dripping principle; An activated carbon tower 14 connected to the first membrane filtration tank 1 and the second membrane filtration tank 2 to move the membrane filtration water 13 through a filtration pump; A discharge pipe 16 installed at the lower end of the second membrane filtration tank 2 to discharge untreated raw water concentrated during operation; Low Power Immersion Membrane Filtration Water Treatment System Using Water Level Braking Control The method of claim 1, Low power immersion type membrane filtration water treatment device using a water level braking control water gate installed at the lower end of the first membrane filtration tank (1) and the second membrane filtration tank (2) is provided with an acid pipe (12) for desorbing the adsorption suspended matter of the separation membrane Introducing a flocculant into the raw water; Filtering large suspended particles through the screen (8) before mixing with the charged flocculant; Mixing the raw water and the flocculant in the in-line mixer 17; Aggregating and improving coagulation efficiency by controlling pH through an agglomeration tank 11 between the inline mixer 17 and the first membrane filtration tank 1; A filtration step in which the raw water passes through the separation membrane in the first membrane filtration tank 1 to filter the suspended solids and forcibly sucks the raw water of the membrane filtration tank through the first stage filtration pump 5 to the activated carbon tower 14; A water gate is installed between the first membrane filtration tank (1) and the second membrane filtration tank (2) so that the raw membrane in which the untreated floating material is partially concentrated in the first membrane filtration tank (1) is passed through the second membrane filtration tank ( 2) the step of being transferred to the natural loading principle by gravity; The raw water is filtered through the second membrane filtration tank 2 adjacent to the first membrane filtration tank 1, and the membrane and the activated carbon tower 14 are communicated with the immersion type separation membrane through the two-stage filtration pump 6 and the membrane filtration tank. A filtration step of forcibly sucking raw water from the raw water and transporting the raw water to the activated carbon tower 14; A backwashing step of desorbing the adsorption floatable material that can be attached to the immersion type separation membrane (15) by reversing the flow of raw water; A discharge step of discharging a predetermined concentrated untreated raw water into a discharge pipe 16 formed at a lower end of the second membrane filtration tank 2; Disinfecting, purifying and supplying the raw water collected by the activated carbon tower 14 through a granular activated carbon filter applied to the activated carbon tower 14 lastly; Low Power Immersion Membrane Filtration Method Using Water Level Braking Control The method of claim 3, wherein A step of automatically controlling the water gate opening and closing by MMI (Man Machine Interface) in connection with the water level level sensor installed in the membrane filtration tank under the membrane filtration tank and the backwash operation condition; In order to prevent backflow to the flocculation tank 11 above the elevated level during backwashing, the opem level of the sluice is determined in the flocculation tank 11 and the membrane filtration tank open level associated with it is determined by Setting lower than the open water level; Setting a close level of each of the hydrologic gates in consideration of the rising water level during the maintenance cleaning and the first membrane filtration tank (1) the highest flow rate; Low power immersion type membrane filtration method using a water level braking control hydrograph. The method of claim 3, wherein Water level braking comprising the step of desorbing the adsorption floatation of the separation membrane by supplying air through the diffuser 12 installed at the bottom while performing the filtration process of the first membrane filtration tank 1 and the second membrane filtration tank 2. Low Power Immersion Membrane Filtration Using Control Hydrology. delete

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