WO2009128119A1 - Procédé de nettoyage de module membranaire et appareil pour cela - Google Patents

Procédé de nettoyage de module membranaire et appareil pour cela Download PDF

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Publication number
WO2009128119A1
WO2009128119A1 PCT/JP2008/001021 JP2008001021W WO2009128119A1 WO 2009128119 A1 WO2009128119 A1 WO 2009128119A1 JP 2008001021 W JP2008001021 W JP 2008001021W WO 2009128119 A1 WO2009128119 A1 WO 2009128119A1
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WO
WIPO (PCT)
Prior art keywords
water
cleaning
chemical solution
membrane module
permeate flow
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Application number
PCT/JP2008/001021
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English (en)
Japanese (ja)
Inventor
北野智一
南里一生
岡島康信
Original Assignee
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 株式会社クボタ filed Critical 株式会社クボタ
Priority to PCT/JP2008/001021 priority Critical patent/WO2009128119A1/fr
Priority to JP2010508037A priority patent/JPWO2009128119A1/ja
Publication of WO2009128119A1 publication Critical patent/WO2009128119A1/fr

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    • 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
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • 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
    • B01D2321/18—Use of gases

Definitions

  • the present invention relates to a membrane module used for filtration or concentration in general water treatment such as clean water and wastewater, and relates to a cleaning method and apparatus thereof.
  • an immersion type membrane separation device in which a plurality of membrane elements are arranged in parallel at appropriate intervals is known.
  • the membrane element is a filter plate made of an organic membrane covering a surface of a rectangular flat filter plate as a membrane support, and the filtration membrane is joined to the filter plate at the peripheral edge.
  • the membrane support include a resin filter plate, a nonwoven fabric, and a net.
  • the membrane element receives the driving pressure and filters the water to be treated with a filtration membrane.
  • Gravity filtration uses the head pressure in the tank as the driving pressure, or suction filtration gives negative pressure as the driving pressure inside the filtration membrane. Used for.
  • This cleaning method is described in, for example, Japanese Patent Publication (Japanese Patent Laid-Open No. 10-57780).
  • Japanese Patent Publication Japanese Patent Laid-Open No. 10-57780.
  • the chemical solution injection means is connected to one end of the membrane module immersed in water in the treatment tank, the circulation means is connected to the other end, and the cleaning chemical solution in the chemical solution tank is injected into the membrane module by the chemical injection pump of the chemical solution injection means.
  • the cleaning chemical solution in the membrane module is sucked and circulated to the chemical solution tank by the chemical solution suction pump of the circulating means.
  • JP-A-10-118470 describes a method in which a liquid to be treated is discharged from a liquid tank in which a membrane module is immersed and then directed from one opening of the membrane module to the other opening.
  • the chemical solution is continuously or intermittently flowed to circulate the chemical solution between the chemical solution tank and the membrane module.
  • JP-A-2002-177746 comprises a treated water recovery step, a chemical solution injection step, a chemical solution extrusion step, and a treated water introduction step.
  • the treated water recovery step compressed air is introduced into the membrane module from one end of the membrane module, and the treated water in the membrane module is collected into the treated water tank from the other end of the membrane module.
  • the chemical solution injection step the chemical solution is injected into the membrane module from one end of the membrane module after completion of the treated water recovery step.
  • the chemical solution extrusion step compressed air is introduced into the membrane module from one end of the membrane module after completion of the chemical solution injection step, and the chemical solution is pushed out of the membrane module through the filtration membrane.
  • the treated water introduction step treated water is introduced into the membrane module after the chemical solution extrusion step is completed, and the membrane module is filled with the treated water.
  • the chemical liquid is supplied to the permeate flow path of the membrane element, the chemical liquid is leached through the filtration membrane to the liquid to be treated, and the filtration membrane and the chemical liquid are temporarily brought into contact with each other.
  • the permeate flow of the membrane element is discharged while discharging the permeate from the permeate flow path.
  • Supply chemicals to the road When the permeated water and the chemical solution are exchanged, the chemical solution supplied to the permeate flow channel of the membrane element through the pipe is diluted with the permeated water remaining in the permeate flow channel, so that the chemical solution reaches a predetermined concentration in the permeate flow channel. Until then, a considerable amount of cleaning chemical solution is required, and the amount of the chemical solution used exceeds the capacity of the permeate channel.
  • the permeate flow path of the membrane element and the pipe communicating with the membrane element are filled with the chemical solution, so that the permeate can be replaced with the permeate before the resumption of the filtration operation.
  • the permeated water is supplied to the permeate channel of the membrane element while discharging the chemical solution from the water channel.
  • the permeated water supplied to the permeate flow path of the membrane element through the piping is mixed with the chemical solution remaining in the permeate flow path, so that a considerable amount of treated wastewater is required until the permeate flow path is filled with only permeate. That is, the permeated water containing the cleaning chemical solution is discharged, the amount of drainage exceeds the capacity of the permeate flow path, and the cost required for detoxifying the treated wastewater increases.
  • Japanese Patent Publication Japanese Patent Application Laid-Open No. 2002-177746 performs a process water recovery process prior to the chemical liquid injection process and a chemical liquid extrusion process prior to the process water introduction process. Yes.
  • the present invention solves the above-described problems, and provides a membrane module cleaning method and apparatus that suppresses the amount of chemical solution used and the amount of treated wastewater, and is applicable to flat membrane membrane modules and the like. Objective.
  • the membrane module cleaning method of the present invention includes a chemical solution replacement step after the permeate discharge step, and sucks permeate remaining in the permeate flow path of the membrane module in the permeate discharge step. While discharging, the replacement gas is naturally aspirated into the permeate flow path of the membrane module, and the permeate in the permeate flow path of the membrane module is replaced with the replacement gas. The replacement gas in the permeate flow channel of the membrane module is naturally exhausted while supplying the cleaning chemical solution to the membrane module, and the replacement gas in the permeate flow channel of the membrane module is replaced with the cleaning chemical solution.
  • the membrane module cleaning method of the present invention further includes a chemical solution cleaning step after the chemical solution replacement step.
  • the chemical solution cleaning step the cleaning chemical solution is supplied from the permeate flow channel while supplying the cleaning chemical solution into the permeate flow channel of the membrane module.
  • the state in which the cleaning chemical solution continues to flow through the permeate flow path or is left standing for a predetermined time in a state where the cleaning chemical solution is filled in the permeated water flow is characterized.
  • the membrane module cleaning method of the present invention includes a chemical solution discharging step after the chemical solution cleaning step, and in the chemical solution discharging step, the cleaning chemical solution remaining in the permeate flow path of the membrane module is sucked and discharged, The replacement gas is naturally sucked into the water flow path, and the cleaning chemical in the permeate flow path of the membrane module is replaced with the replacement gas.
  • the membrane module cleaning method of the present invention includes a water replacement step after the chemical solution discharging step, and in the water replacement step, the replacement water is supplied into the permeate flow channel of the membrane module, The replacement gas is naturally exhausted, and the replacement gas in the permeate flow path of the membrane module is replaced with replacement water.
  • the membrane module cleaning method of the present invention is characterized in that the permeated water discharged in the permeated water discharge step is temporarily stored, and the temporarily stored permeated water is used as replacement water in the water replacement step.
  • the membrane module includes at least one membrane element in which the permeate flow channel communicates with the first water collection unit and the second water collection unit.
  • the permeated water remaining in the permeated water flow path of the membrane element is sucked and discharged through the first water collecting section, and the replacement gas is naturally sucked into the permeated water flow path of the membrane element through the second water collecting section,
  • the cleaning chemical solution is supplied to the permeate flow path of the membrane element through the first water collection section, and the replacement gas in the permeate flow path of the membrane element is naturally exhausted through the second water collection section.
  • the membrane module cleaning method of the present invention further includes a chemical solution cleaning step after the chemical solution replacement step, and in the chemical solution cleaning step, while supplying the cleaning chemical solution to the permeate flow path of the membrane element through the first water collecting portion,
  • the cleaning chemical solution is discharged from the permeate flow channel through the water collecting section 2 and the cleaning chemical solution continues to flow through the permeate flow channel of the membrane element, or the permeated water flow is filled with the cleaning chemical solution for a predetermined time. It is characterized by placing.
  • the membrane module cleaning method of the present invention further includes a chemical solution discharging step after the chemical solution cleaning step, and in the chemical solution discharging step, the cleaning chemical solution remaining in the permeate flow path of the membrane element is sucked and discharged through the first water collecting portion.
  • the replacement gas is naturally sucked into the permeate flow path of the membrane element through the second water collecting section, and the cleaning chemical in the permeate flow path of the membrane element is replaced with the replacement gas.
  • the membrane module cleaning method of the present invention includes a water replacement step after the chemical solution discharging step, and in the water replacement step, supplying replacement water into the permeate flow path of the membrane element through the first water collecting portion, The replacement gas in the permeate flow path of the membrane element is naturally exhausted through the second water collecting section, and the replacement gas in the permeate flow path of the membrane element is replaced with replacement water.
  • the membrane module cleaning apparatus includes a membrane module including at least one membrane element in which a permeate flow path communicates with a first water collection unit and a second water collection unit, and the first water collection unit.
  • a permeate discharge means for sucking and discharging permeate remaining in the permeate flow path of the membrane element; a chemical supply means for supplying a cleaning chemical liquid into the permeate flow path of the membrane element through the first water collecting portion; The air in the atmosphere is naturally sucked into the permeate flow path of the membrane element through the water collection section, or the replacement gas in the permeate flow path of the membrane element is naturally exhausted into the atmosphere through the second water collection section. And an atmospheric release means.
  • the membrane module cleaning apparatus of the present invention is characterized by comprising a chemical solution discharging means for sucking and discharging the cleaning chemical solution remaining in the permeate flow path of the membrane element through the first water collecting portion.
  • the membrane module cleaning apparatus of the present invention is characterized by comprising water supply means for supplying replacement water into the permeate flow path of the membrane element through the first water collecting section.
  • the present invention replaces the permeated water and the replacement gas in the permeated water discharge step, replaces the replacement gas and the cleaning chemical solution in the chemical solution replacement step, and the cleaning chemical solution and the replacement gas in the chemical solution discharge step.
  • the replacement gas and the replacement water in the water replacement step it is possible to suppress the amount of the chemical solution used and the amount of the treated wastewater discharged in the chemical cleaning of the membrane module.
  • the amount of cleaning chemical used to fill the permeate flow path of the membrane module with a predetermined concentration of cleaning chemical, and the treatment wastewater discharged before the cleaning chemical is discharged from the permeate flow path of the membrane module and replaced with the replacement water becomes a limited amount corresponding to a predetermined capacity of the membrane element and the water collecting part of the membrane module and the piping.
  • the permeated water and the cleaning chemical solution are sucked and discharged, and the replacement gas enters and exits the permeate flow path of the membrane module by natural intake and exhaust, so that the permeate flow path of the membrane module causes breakage or separation of the filtration membrane.
  • the cleaning method and apparatus can be applied to a flat membrane membrane module or the like without being excessively pressurized.
  • the perspective view which shows the membrane module in embodiment of this invention The perspective view which shows the other structure of the membrane module in embodiment of this invention
  • cleaning apparatus of the membrane module in embodiment of this invention Schematic diagram showing the permeate discharge process of the membrane module Schematic diagram showing the chemical replacement process of the membrane module
  • the perspective view which shows the membrane module in embodiment of this invention The schematic diagram which shows the washing
  • FIG. 1 and FIG. 3 the membrane module 11 constituting the membrane separation apparatus is immersed and installed in the liquid to be treated in the treatment tank 12, and an air diffuser 11a is disposed below the membrane module 11, The air device 11a is connected to the blower 11b.
  • the membrane module 11 has a plurality of membrane elements 13 arranged in parallel at a predetermined interval, and both sides in the lateral direction of each membrane element 13 are sealed in a watertight manner to the first water collecting portion 14 and the second water collecting portion 15, respectively.
  • a vertical flow path is formed between the membrane elements 13.
  • the 1st water collection part 14 and the 2nd water collection part 15 make hollow shape, and have a water collection space inside.
  • the membrane element 13 may be singular.
  • the water collecting part 14 only on one side of the membrane element 13.
  • the other side portion of the membrane element 13 is sealed with a sealing material 14a such as resin.
  • the membrane element 13 is arranged in the vertical direction.
  • the arrangement direction of the membrane element 13 is not limited to the vertical direction, and any arrangement is possible as long as it is arranged along the flow direction of the liquid to be processed.
  • the membrane element 13 has a resin filter plate that forms a membrane support and a filtration membrane made of a flat membrane (organic membrane) disposed so as to cover the main surfaces of the front and back surfaces.
  • a permeate flow passage formed between the front and back main surfaces of the filter plate and the filtration membrane communicates with the water collection space of the first water collection unit 14 and the second water collection unit 15.
  • a flexible material such as a nonwoven fabric or a net may be used.
  • the membrane module 11 is connected to the pipeline system at the lower part of the first water collecting part 14 and the upper part of the second water collecting part 15.
  • the connection position of the pipeline system with respect to the water collecting portions 14 and 15 is not limited to the form shown in FIG. 3, but is near the lower portion of the first water collecting portion 14 and the upper portion of the second water collecting portion 15. good.
  • the first permeate drain 14 is connected to the first permeate drain line 20 and the chemical liquid supply line 30, and the permeate drain 20 and chemical supply line 30 are connected to the water collector.
  • the part connected to 14 is also used mutually.
  • the first permeated water discharge pipeline system 20 and the chemical solution supply pipeline system 30 can also be separately connected to the water collection unit 14.
  • the first permeate discharge conduit system 20 has a first permeate suction pump 21 and a first valve 22 to form a permeate discharge means, and passes through the first water collecting part 14 in the permeate flow path of the membrane element 13. The permeated water is sucked and discharged by the first permeated water suction pump 21.
  • the chemical solution supply line system 30 includes a chemical solution supply pump 31, a second valve 32 and a chemical solution tank 33 to form a chemical solution supply means, and supplies the cleaning chemical solution into the permeate flow path of the membrane element 13 through the first water collection unit 14. Supply.
  • the second water collecting section 15 communicates with the atmospheric open conduit system 40, the chemical solution circulation conduit system 50, and the second permeate discharge conduit system 60, and the atmospheric open conduit system 40 and the chemical solution circulation conduit system are connected. 50 and the second permeated water discharge pipe line system 60 share a portion connected to the water collecting portion 15.
  • the air opening conduit system 40, the chemical solution circulation conduit system 50, and the second permeated water discharge conduit system 60 can be separately connected to the water collecting section 15, respectively.
  • the air release pipe line system 40 has a third valve 41 and serves as an air release means.
  • the air in the atmosphere is naturally taken into the permeate flow passage of the membrane element 13 as a replacement gas through the second water collecting part 15.
  • the replacement gas in the permeate flow path of the membrane element 13 is naturally exhausted to the atmosphere through the second water collecting portion 15.
  • the chemical solution circulation line system 50 includes a chemical solution suction pump 51 and a fourth valve 52, and circulates the cleaning chemical solution in the permeate flow path of the membrane element 13 through the second water collecting unit 15 to the chemical solution tank 33.
  • the second permeated water discharge pipe system 60 has a second permeated water suction pump 61 and a fifth valve 62 to form a permeated water discharging means, and passes through the second water collecting portion 15 in the permeated water flow path of the membrane element 13. The permeated water is sucked and discharged by the second permeated water suction pump 61.
  • the chemical solution supply pipeline system 30 and the chemical solution circulation pipeline system 50 communicate with each other via the chemical solution tank 33 to form a circulation system.
  • the chemical solution supply pipeline system 30 and the chemical solution circulation pipeline system It is also possible to adopt a configuration that does not connect 50.
  • the operation of the membrane module 11 performs filtration, air replacement, chemical cleaning, and air replacement. This will be described in detail below.
  • Foiltration As shown in FIG. 3, the second valve 32, the third valve 41, and the fourth valve 52 are closed, and the first valve 22 and the fifth valve 62 are opened. A suction pressure is applied to the membrane module 11 by the first permeated water suction pump 21 and the second permeated water suction pump 61, the water to be treated is filtered by each membrane element 13, and the permeated water that has passed through the filtration membrane is passed through the membrane element 13. Drain from water channel.
  • the air supplied from the blower 11b is aerated from the diffuser 11a into the water to be treated, and the membrane surface of the membrane element 13 is washed by the gas-liquid mixed phase flow generated in the water to be treated.
  • (Chemical cleaning) Permeated Water Discharge Process As shown in FIG. 4, the second valve 32, the fourth valve 52, and the fifth valve 62 are closed, and the first valve 22 and the third valve 41 are opened. While the permeated water remaining in the permeated water flow path of each membrane element 13 is sucked and discharged through the first water collecting section 14 and the first permeated water discharge conduit system 20 by the first permeated water suction pump 21, each membrane element 13.
  • Air is naturally aspirated as a replacement gas through the second water collecting portion 15 and the atmospheric open conduit system 40 in the permeate flow path, and the permeate in the permeate flow path of the membrane element 13 is replaced with air.
  • Chemical Solution Replacement Step As shown in FIG. 5, the first valve 22, the fourth valve 52, and the fifth valve 62 are closed, and the second valve 32 and the third valve 41 are opened.
  • the cleaning chemical liquid in the chemical liquid tank 33 is supplied from the lower part of the first water collecting part 14 into the permeate water flow path of the membrane element 13 through the chemical liquid supply pipe system 30 by the chemical liquid supply pump 31 and into the permeate water flow path of the membrane element 13.
  • a membrane cassette 10 is configured by stacking a plurality of membrane modules 11 vertically.
  • the membrane module 11 includes an upper connecting portion 16 provided on each upper end surface of the first water collecting portion 14 and a second water collecting portion 15 and a lower connecting portion 17 provided on each lower end surface.
  • the upper connecting part 16 and the lower connecting part 17 communicate with the water collecting spaces of the water collecting parts 14 and 15 by forming a flow path.
  • the first permeated water discharge pipeline system 20 and the chemical solution supply pipeline system 30 have a first water collection section 14 and a second water collection section with respect to the lowermost membrane module 11. 15, and a sixth valve 71 is interposed between the lower connecting portions 17.
  • the permeated water discharge conduit system 20 and the chemical solution supply conduit system 30 share the portions connected to the water collection section 14 and the water collection section 15, but can be provided separately.
  • the first permeate discharge conduit system 20 has a first permeate suction pump 21 and a first valve 22 to form a permeate discharge means, and the permeate in the permeate flow path of the membrane element 13 is sucked into the first permeate.
  • the pump 21 sucks and discharges.
  • the chemical solution supply line system 30 includes a chemical solution supply pump 31, a second valve 32, and a chemical solution tank 33 to form a chemical solution supply unit, and supplies a cleaning chemical solution into the permeate channel of the membrane element 13.
  • the second water collecting section 15 of the uppermost membrane module 11 is in communication with an open air conduit system 40, a chemical solution circulation conduit system 50, and a second permeate discharge conduit system 60.
  • the atmosphere opening conduit system 40, the chemical solution circulation conduit system 50, and the second permeated water discharge conduit system 60 share the portion connected to the water collecting section 15, but can be provided separately. .
  • the air release pipe line system 40 has a third valve 41 and serves as an air release means.
  • the air in the atmosphere is naturally taken into the permeate flow passage of the membrane element 13 as a replacement gas through the second water collecting part 15.
  • the replacement gas in the permeate flow path of the membrane element 13 is naturally exhausted to the atmosphere through the second water collecting portion 15.
  • the chemical solution circulation line system 50 includes a chemical solution suction pump 51 and a fourth valve 52, and circulates the cleaning chemical solution in the permeate flow path of the membrane element 13 through the second water collecting unit 15 to the chemical solution tank 33.
  • the second permeated water discharge pipe system 60 has a second permeated water suction pump 61 and a fifth valve 62 to form a permeated water discharging means, and passes through the second water collecting portion 15 in the permeated water flow path of the membrane element 13. The permeated water is sucked and discharged by the second permeated water suction pump 61.
  • the chemical solution supply pipeline system 30 and the chemical solution circulation pipeline system 50 communicate with each other via the chemical solution tank 33 to form a circulation system.
  • the chemical solution supply pipeline system 30 and the chemical solution circulation pipeline system It is also possible to adopt a configuration that does not connect 50.
  • a permeate water storage conduit system 80 and a chemical liquid discharge conduit system 90 communicate with the discharge side of the first permeate suction pump 21 in the first permeate discharge conduit system 20.
  • the chemical solution discharge pipeline system 90 also serves as a portion connected to the first permeate discharge pipeline system 20.
  • the permeate water storage line system 80 has a seventh valve 81, an eighth valve 82 and a permeate water storage tank 83, and the chemical liquid discharge pipe system 90 has a ninth valve 91 and communicates with the chemical liquid tank 33. .
  • a permeated water supply system 100 communicates with the suction side of the chemical liquid supply pump 31 in the chemical liquid supply line system 30, and the permeated water supply system 100 has a tenth valve 101 to serve as water supply means, and stores permeated water. It communicates with the tank 83.
  • a suction pressure is applied to the membrane module 11 by the first permeated water suction pump 21 and the second permeated water suction pump 61, the water to be treated is filtered by each membrane element 13, and the permeated water that has passed through the filtration membrane is passed through the membrane element 13. Drain from water channel.
  • the air supplied from the blower 11b is aerated from the diffuser 11a into the water to be treated, and the membrane surface of the membrane element 13 is washed by the gas-liquid mixed phase flow generated in the water to be treated. (Chemical cleaning)
  • the first valve 22, the second valve 32, the fourth valve 52, the fifth valve 62, the ninth valve 91, and the tenth valve 101 are closed, the third valve 41, The 6 valve 71, the seventh valve 81, and the eighth valve 82 are opened.
  • the first permeate suction pump 21 sucks the permeate remaining in the permeate flow path of each membrane element 13 through the first water collection unit 14, the second water collection unit 15, and the first permeate discharge pipe system 20. While being discharged and supplied to the permeate water storage tank 83 through the permeate water storage pipeline system 80, as a replacement gas through the second water collection unit 15 and the atmosphere open conduit system 40 in the permeate water flow path of each membrane element 13. Air is naturally aspirated, and the permeate in the permeate flow path of the membrane element 13 is replaced with air.
  • the sixth valve 71 As shown in FIG. 9, the first valve 22, the fourth valve 52, the fifth valve 62, the sixth valve 71, the seventh valve 81, the eighth valve 82, the ninth valve 91, and the tenth valve 101 are arranged. The second valve 32 and the third valve 41 are opened.
  • the cleaning chemical liquid in the chemical liquid tank 33 is supplied from the lower part of the first water collecting part 14 into the permeate water flow path of the membrane element 13 through the chemical liquid supply pipe system 30 by the chemical liquid supply pump 31 and into the permeate water flow path of the membrane element 13. Is naturally evacuated from the upper part of the second water collecting section 15 through the open air conduit system 40 to replace the air in the permeate flow path of the membrane element 13 with the cleaning chemical.
  • Chemical Cleaning Process After expelling the air accumulated in the membrane module 11 in the state shown in FIG. 9, the third valve 41 is closed and the fourth valve 52 is opened.
  • the permeated water flow path is supplied through the chemical liquid circulation conduit system 50 and the second water collecting section 15 by the chemical liquid suction pump 51 while supplying the cleaning chemical liquid to the permeated water flow path of the membrane element 13 through the first water collecting section 14. Then, the cleaning chemical solution is drained and circulated in the chemical solution tank 33. Then, the state in which the cleaning chemical solution flows in the permeate flow path of the membrane element 13 is continued.
  • the state in which the cleaning chemical solution flows in the permeate flow channel of the membrane element 13 in the chemical solution cleaning step is continued.
  • the chemical solution cleaning step it is possible to leave the cleaning chemical solution for a predetermined time in a state where the cleaning chemical solution is filled in the permeate flow path of the membrane element 13.
  • the first valve 22, the second valve 32, the fourth valve 52, the fifth valve 62, the eighth valve 82, and the tenth valve 101 are closed, and the third valve 41, the sixth valve 101, The valve 71, the seventh valve 81, and the ninth valve 91 are opened.
  • the first permeated water suction pump 21 sucks and discharges the cleaning chemical remaining in the permeated water flow path of each membrane element 13 through the first water collecting section 14 and the second water collecting section 15, and passes through the chemical liquid discharging conduit system 90. While being supplied to the chemical tank 33, air is naturally sucked into the permeate flow path of the membrane element 13 through the atmosphere open conduit system 40 and the second water collecting section 15, and the permeate flow path and the permeate flow path of the membrane element 13 are obtained. Replace the cleaning chemical in the pipe communicating with the air for the replacement gas. Water Replacement Step As shown in FIG. 11, the first valve 22, the second valve 32, the fourth valve 52, the fifth valve 62, the sixth valve 71, the seventh valve 81, the eighth valve 82, and the ninth valve 91 are arranged. The third valve 41 and the tenth valve 101 are opened.
  • the permeated water in the permeated water storage tank 83 is supplied to the permeated water flow path of the membrane element 13 through the permeated water supply system 100 and the first water collecting section 14 by the chemical liquid supply pump 31, the open air system 40 and the second
  • the air in the permeated water flow path of the membrane element 13 is naturally exhausted through the water collecting section 15, and the air in the permeated water flow path of the membrane element 13 and the pipe communicating with the permeated water flow path is replaced with the permeated water of the replacement water.
  • replacement water is supplied from the permeate storage tank 83.
  • the replacement water can be supplied from a separate storage tank.

Abstract

La quantité de solution chimique utilisée et la quantité d'eau résiduaire traitée évacuée sont réduites par filtration, remplacement par de l'air, nettoyage de la solution chimique et remplacement par de l'air.
PCT/JP2008/001021 2008-04-18 2008-04-18 Procédé de nettoyage de module membranaire et appareil pour cela WO2009128119A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/JP2008/001021 WO2009128119A1 (fr) 2008-04-18 2008-04-18 Procédé de nettoyage de module membranaire et appareil pour cela
JP2010508037A JPWO2009128119A1 (ja) 2008-04-18 2008-04-18 膜モジュールの洗浄方法および装置

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Application Number Priority Date Filing Date Title
PCT/JP2008/001021 WO2009128119A1 (fr) 2008-04-18 2008-04-18 Procédé de nettoyage de module membranaire et appareil pour cela

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WO2009128119A1 true WO2009128119A1 (fr) 2009-10-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012045515A (ja) * 2010-08-30 2012-03-08 Yuasa Membrane System:Kk 膜エレメント

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10118470A (ja) * 1996-10-22 1998-05-12 Mitsubishi Rayon Co Ltd 分離膜モジュールの洗浄方法
JP2003024752A (ja) * 2001-07-18 2003-01-28 Stem:Kk ろ過分離膜カートリッジ、及びこれを用いたろ過装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10118470A (ja) * 1996-10-22 1998-05-12 Mitsubishi Rayon Co Ltd 分離膜モジュールの洗浄方法
JP2003024752A (ja) * 2001-07-18 2003-01-28 Stem:Kk ろ過分離膜カートリッジ、及びこれを用いたろ過装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012045515A (ja) * 2010-08-30 2012-03-08 Yuasa Membrane System:Kk 膜エレメント

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