KR101416535B1 - floating type water treating apparatus using separating film module - Google Patents

Abstract

According to the present invention, the buoyancy type high-altitude water treatment apparatus using the separation membrane module includes a support case installed in the separation membrane tank, a plurality of separation membrane modules installed in the support case, And a pump unit installed on the inflow pipe for discharging the treated water through the discharge pipe, wherein the inflow pipe is provided on the outer circumferential surface of the support case, and the inflated or deflated A buoyancy generating unit for generating and extinguishing buoyancy for lifting the support case, and a support case floating unit connected to the buoyancy generating unit by a connection pipe, and including a pneumatic supply unit for supplying and discharging pneumatic pressure. The apparatus for treating high-altitude water using the membrane module according to the present invention can float the support case provided with the membrane module for maintenance. If the membrane module is contaminated, the membrane module is cleaned .

Description

[0001] The present invention relates to a floating type water treating apparatus using a separating film module,

The present invention relates to a wastewater treatment apparatus, and more particularly, to a buoyancy type high-altitude water treatment apparatus using a separation membrane module capable of floating a filter for replacement of a filter and capable of backwashing a contaminated filter.

Generally, the activated sludge membrane separation process or membrane bound activated sludge process is generally referred to as MBR (Membrane Bio Reactor) as a combination of a bioreactor and a membrane separation process. The MBR process is a highly separation process that can almost completely separate and remove substances to be treated (organic, inorganic contaminants, microorganisms, etc.) present in the raw water, the raw water and the wastewater, depending on the pore size of the separation membrane and the membrane surface charge .

Particularly, in Korea, studies on combining biological sewage removal (BNR) process and MBR process have been carried out actively in accordance with the strengthening of water quality standards for effluent water. The MBR process is characterized in that it does not require a settling tank and can maintain the microbial concentration 3 to 4 times higher than that of the activated sludge process. Thus, it is possible to effectively decompose organic matter in a smaller aeration tank capacity, The nitrification can be induced by maximization, and the volume of the concentrate tank is also reduced because the amount of surplus sludge generated is small, so that a compact process is possible. The advantage of the MBR process is that it can treat 100% of suspended solids, so it can be treated with very stable treatment (BOD and SS can be treated at 5 mg / L or less) irrespective of sludge sedimentation. It is possible to remove large germs and viruses, so that treated water can be used as heavy water.

Since the membrane unit is additionally installed in the aeration tank in which the existing activated sludge process is applied, the conversion from the existing activated sludge process to the membrane separation process is actively increasing because the construction is simple and economical and stable water quality can be obtained. The MBR process can be completely separated from the existing activated sludge process by separation membrane, and can maintain a high MLSS concentration (5,000-15,000 mg / L) in the reaction tank. Such high microbial concentration increases the efficiency of nitrification and increases the sludge retention time (SRT), thereby increasing the sludge capitalization and reducing the amount of sludge generated. The advantages of the MBR process can be highlighted because the cost of sludge treatment is large in the entire wastewater treatment cost, and the cost and site for sedimentation can be reduced by using a separation membrane instead of the sedimentation basin.

Among the advantages of the MBR process, the most important one is that stable operation is possible. In other words, there is no need to worry about sludge bulging which occurs in the secondary settling basin. If the sludge expansion occurs, the smooth solid-liquid separation of the settling basin can not be performed, which causes a decrease in the overall bottom and wastewater treatment efficiency . However, in the MBR, stable sludge or wastewater treatment is possible because all of the expanded sludge is separated by the membrane.

In the apparatus for performing the MBR process, a plurality of separation membranes are formed at predetermined intervals in the membrane case, and organic or inorganic contaminants and microorganisms are separated from the raw water, sewage or wastewater through the separation membrane. However, as the organic material is separated from sewage or wastewater, the separation membrane is clogged with fine pores of the separation membrane, resulting in a relatively low water treatment efficiency.

As described above, when the pores of the separation membrane become clogged and the water treatment efficiency decreases, the separation membrane is exchanged by lifting the membrane case periodically from the separation membrane vessel. However, in order to exchange these membranes, a separate lifting means is required, and not only a troublesome operation but also a lot of maintenance expenses are required. Particularly, since the separation membrane for performing the conventional MBR process can not be cleaned in a state where the separation membrane is installed in the separation membrane bath, the lifetime is shortened.

In view of the above-described problems, Korean Patent Laid-Open Publication No. 2011-0132039 discloses an immersion membrane device. The disclosed membrane separation apparatus includes a membrane module case portion having an opened top surface to mount a plurality of membrane modules; A diffuser case portion located at a lower portion of the membrane module case portion and having a side opened, the diffuser case portion including a diffuser; A cleaning ball located within the membrane module case and the diffuser case; And an isolation net formed on an upper surface of the membrane module case and a side surface of the diffuser case to prevent the cleaning ball from being detached.

The above-described submerged membrane separation apparatus uses the cleaning ball mounted on the membrane module case to induce the cleaning effect, but the cleaning by the cleaning ball can not uniformly clean each part of the separation membrane.

Korean Patent Registration No. 0548181 discloses a method for treating wastewater using a non-woven fabric separating membrane and a wastewater treatment apparatus for the same, and Japanese Patent Application Laid-Open No. 2009-0071583 discloses a method for treating wastewater from industrial wastewater by using immersed ultrafiltration or microfiltration membranes, There is a way to remove. Patent No. 1018587 shows a nitrogen removal membrane separation membrane advanced treatment device. Patent registration No. 0552712 shows a highly efficient separation membrane unit for treating wastewater. Patent No. 0552637 discloses a simple assembly type wastewater treatment A separator unit device is disclosed.

The above-described conventional advanced treatment apparatus using a separation membrane has a structure capable of backing up a separation membrane, and has the above-described problems of exchanging and washing separation membranes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a membrane module which can float the membrane case in which the membrane modules are installed to replace the damaged membrane module, And an object of the present invention is to provide a buoyancy type water treatment apparatus using a membrane module.

According to an aspect of the present invention, there is provided a buoyancy type high-altitude water treatment apparatus using a membrane module, including a support case installed in a membrane separation tank, a plurality of separation membrane modules installed in the support case, And a pump unit installed on the inflow pipe and discharging the treated water through the discharge pipe, wherein the inflow pipe is connected to the branch pipe,

A buoyancy generating unit installed on an outer circumferential surface of the support case for generating and extinguishing buoyancy for expanding or contracting by the pneumatic pressure to float the support case and a buoyancy generating unit connected to the buoyancy generating unit by a connection pipe, And a support case floatation unit including a pneumatic supply part for the support case.

In the present invention, it is preferable that a sensor unit for sensing a pressure difference between the inlet pipe and the discharge pipe, and a cleaning liquid supply unit for supplying a cleaning liquid for backwashing the separation membrane module when the pressure difference sensed by the sensor unit becomes equal to or higher than a set pressure And a separator module cleaning unit including the separator module cleaning unit.

The buoyancy type high-altitude water treatment apparatus using the separation membrane module of the present invention can easily perform maintenance or repair such as replacement or repair of the separation membrane module, and can clean the separation membrane module with the separation membrane module installed in the separation membrane tank. This can prolong the life of the advanced water treatment system.

1 is a side view of a buoyancy type high-altitude water treatment apparatus using a separation membrane module according to the present invention,
2 is a front view showing a support case provided with a separation membrane module,
3 is a side view of the support case shown in Fig. 2,
4 is a perspective view of a support case provided with a separation membrane module,
5 and 6 are sectional views showing the support case floating unit,
7 is a perspective view illustrating the separation membrane module cleaning unit according to the present invention.

The buoyancy type high-altitude water treatment apparatus using the separation membrane module according to the present invention is easy to replace and repair the separation membrane module and can be cleaned in a state where the separation membrane module is mounted in the separation membrane tank. Examples thereof are shown in FIGS. 1 and 2 .

1, the buoyant type high-altitude water treatment apparatus 10 using a separation membrane module is immersed in raw water, sewage or wastewater for treatment contained in the separation liquid tank 20 as shown in FIG. 1, A plurality of separation membrane modules 40 installed in the support case 31 and a branch pipe 41 connected to the separation membrane module 40 for discharging the filtered treatment water, And a pumping unit 45 having an inlet pipe 42 connected to the inlet pipe 41 and a pump 44 installed in the inlet pipe 42 for discharging treated water through the discharge pipe 43. An acid generator unit (50) is installed on the lower surface of the support case (20) to sludge the sludge attached to the outer surface of the separation membrane module (40).

A support case floating unit (60) is installed on the lower outer circumferential surface of the support case (31) to float and immerse the support case (31) provided with the separation membrane module (40) by buoyancy. The advanced water treatment apparatus 10 using the membrane module 40 senses a pressure difference between the inlet pipe 42 and the discharge pipe 43 of the pumping unit 43 and detects the pressure difference between the inlet pipe 42 and the discharge pipe 43, A cleaning unit 70 for cleaning the semiconductor wafer W using a chemical.

The separation liquid tank 20 has a structure in which sewage or wastewater is contained and the top is opened, but the present invention is not limited thereto. A plurality of support cases 20 having a plurality of separation membrane modules 40 may be installed in the separation liquid tank 20.

The air diffuser 50 is provided below the support case 31 provided with the separation membrane modules 20 at predetermined intervals and is provided with the spray nozzles 51 for spraying the compressed air, And an air supply pipe (52) for supplying compressed air to the air supply pipe (52). The air supply pipe 52 is connected to a compressor (not shown) for supplying compressed air. The injection nozzle 51 may be a pipe provided in parallel with the separation membrane module 20 and formed with a spray hole in the longitudinal direction.

The compressed air supplied to the spraying nozzle 52 through the air supply pipe 51 to the air diffuser 80 according to the present invention is sprayed so that the sludge adhered to the outer peripheral surface of the separation membrane module 40 is discharged to the outside of the separation membrane module 40 So that interference with the inflow of the treated water into the separation membrane module 40 is prevented. At this time, it is preferable that the air rising speed is set to be maintained at 5 to 15 m / sec or more in consideration of the water pressure in accordance with the effective water depth in the separation membrane tank 20 which is a biological reaction tank from the injection nozzle 51.

The floating unit 60 is provided with a floating tube 61 continuously or discontinuously on the outer circumferential surface of the supporting case 31. The floating tube 61 is provided with a floating pressure supply pipe 62, The float tube 61 is inflated by the high pressure supplied through the valve 62 to provide a floating force. The floating-pressure supply pipe (62) is branched from the air supply pipe (51) and receives air pressure for floating. The floatation supply pipe (62) is provided with a first valve (63) for interrupting the supply of air. The case is provided with a pressing member 64 for pressurizing the floating tube 61 to discharge air from the floating tube 61. The pressing member 64 is an elastic spring 5) or an elastic band having both ends supported by the support case 31 so as to press the floating tube 61. The pressing member 64 may be composed of a plate member whose one side is coupled by a rotating shaft. The plate member is elastically biased toward the floating tube 61 side by a torsion spring provided on the rotating shaft. At this time, a discharge pipe 65 branched therefrom is installed in the floatation supply pipe 62 so that air in the float pipe 61 can be discharged through the floatation supply pipe 62. The discharge pipe 65 is provided with air A second valve 66 for interrupting the discharge of the exhaust gas.

In another embodiment, the supporting case 31 is not provided with a pressing member for discharging the air in the floating tube 61, and is connected to the discharge pipe provided in the floating-pressure supply pipe 62, And a vacuum pump (not shown) for discharging air.

The above-described floating unit 60 supplies air to the floating-pressure supply pipe 62 for replacement and repair of the separation membrane module 40 provided in the support case 31, thereby expanding the floating-up tube 61 to generate buoyancy . Therefore, the support case 31 is raised by buoyancy. When the support case 31 is lifted up as described above, the separation membrane module 40 can be easily exchanged or repaired, and it is not necessary to lift the separation membrane module 40 by using a separate crane or winch. In order to immerse the support crane 31 in which the separation membrane module 40 is installed, the second valve 66 provided in the discharge pipe 65 branched from the floating pneumatic pipe 62 is opened to remove the air in the floating tube 61 The support case 31 on which the separation membrane module 40 is mounted can be immersed.

The separation membrane module cleaning unit 70 senses a difference between the discharge pressure of the discharge pipe 43 and the pressure of the inlet pipe 42 and stops the pumping unit 45 when the pressure is less than the set pressure, The differential pressure gauges 71 and 72 are sensors for detecting the differential pressure between the discharge pipe 43 and the inflow pipe 42. The cleaning liquid is stored and is supplied to the inflow pipe 42 by the medicine supply pipe 74. [ And a medicine supply pump 75 installed in the medicine supply pipe 74. The medicine supply tank 75 is connected to the medicine supply tank 75, And a control unit 76 for comparing the differential pressure detected by the differential pressure gauges 71 and 72 with a predetermined differential pressure to drive the medicine supply pump 75.

The supply of the medicine through the medicine supply pipe 75 is not performed by the medicine supply pump but may be supplied by gravity. In this case, the chemical storage tank 73 's should be located above the separation membrane module 40 and the inflow pipe 42, and the chemical supply pipe 75 is controlled by the control unit 76 Lt; / RTI >

When the separation membrane module is contaminated with organic substances, the chemical solution stored in the chemical supply pipe 74 is preferably diluted (diluted to 0.6%) by mixing sodium hypochlorite (NaOCl 12% raw solution) 20 times with water Do. In this case, if MLSS concentration is 10,000 mg / L, sodium hypochlorite is diluted to 0.3%. If the membrane module is an inorganic substance (contamination containing Fe or Al), 0.1 ~ 1% of oxalic acid solution should be used. If the membrane module is contaminated with contaminants containing Ca, it is preferable to use HCl solution. The cleaning liquid is not limited to the above-described embodiment, but may be varied depending on contaminants polluting the separation membrane module.

In the water treatment using the separation membrane according to the present invention, the treatment water flowing into the separation membrane module 40 from the wastewater contained in the separation solution tank 20 or the solution contained in the raw water passes through the branch pipe 41 Is introduced into the inflow pipe (42), and the treated water is discharged to the discharge pipe (45) through the pump (44).

If the separator module 40 is contaminated or clogged by the sludge or the like in this process, the pressure difference between the inlet pipe 42 sensed by the differential pressure gauges 71 and 72 and the discharge pipe 43 becomes large . 7, the control of the control unit 76 stops the driving of the pump 44, the check valve installed on the suction port side of the pump is operated, and the discharge pipe (not shown) The medicine feed pump 75 is operated to pump the medicine in the medicine storage tank 73 so that the inflow pipe 42 and the branch pipe 41 can be pumped, And flows into the separation membrane module 40 to clean the contaminated separation membrane module 40. When the cleaning liquid flows into the separation membrane module by gravity, the valve installed in the medicine supply pipe 74 is opened by the control unit.

The separation membrane module 40 is cleaned by allowing the chemical solution to stand for about 1 to 2 hours after the chemical solution is injected into the separation membrane module 40 (preferably, for 2 hours for contamination with organic substances and 1 hour for contamination with inorganic substances) To be removed.

After the cleaning is completed as described above, the third valve 72a provided in the chemical supply pipe 74 for supplying the chemical liquid from the chemical storage tank 72 is cut off and the diffuser unit 50 is driven to discharge the chemical liquid through the spray nozzle 51 Aeration. The pump of the pumping unit is driven to discharge the treated water. The above operation may be performed by the control unit 76. [

As described above, in the advanced water treatment apparatus using the membrane module according to the present invention, if the membrane module is contaminated and the water treatment is not performed smoothly, the membrane module can be cleaned using the differential pressure between the inlet tube and the discharge tube. . In order to maintain the separation membrane module and the support case supporting the separation membrane module, the float generated by supplying air to the float tube immersed in the separation liquid tank can be floated, thus facilitating maintenance and reducing the number of operations.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

The buoyant type high-altitude water treatment apparatus using the membrane module of the present invention is widely applicable to various water treatment apparatuses such as raw water, wastewater, sewage, and water.

10; Advanced water treatment system.
31: Support case
40;
50;
60;
70; membrane module cleaning unit

Claims (4)

A plurality of separation membrane modules installed in the support case, a branch pipe connected to the separation membrane module to discharge the filtered treatment water, an inlet pipe connected to the branch pipe, And a pump unit installed in the inflow pipe for discharging the treated water through the discharge pipe,
A buoyancy generating unit provided on an outer circumferential surface of the support case for generating or extinguishing buoyancy for expanding or contracting by the air pressure to float the support case; And a support case floatation unit including a pneumatic supply unit for the support case,
The buoyancy generating unit includes a floating tube installed on an outer circumferential surface of the support case and expanding and contracting by a pneumatic pressure supplied from the pneumatic supply unit and an elastic member provided on the support case for pressing and contracting the floating tube. A buoyancy type water treatment system using a membrane module. delete The method according to claim 1,
And a separation membrane module cleaning unit for cleaning the separation membrane module by supplying a cleaning liquid for cleaning through the inlet pipe, the discharge pipe, and the branch pipe by a differential pressure between the inlet pipe and the discharge pipe. Device. The method of claim 3,
Wherein the separation membrane module cleaning unit comprises a differential pressure gauge installed on the discharge pipe and the inflow pipe and measuring a pressure difference between the discharge pipe and the inflow pipe, a medicine storage tank connected by the inflow pipe and the medicine supply pipe, And a control unit for operating the pump or the third valve by comparing the pressure detected by the differential pressure gauge with the set pressure, Wherein the buoyancy type water treatment apparatus is a buoyancy type water treatment apparatus using a separation membrane module.

Images