TWI532686B - High salinity wastewater treatment system and method thereof - Google Patents
High salinity wastewater treatment system and method thereof Download PDFInfo
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Description
本發明係關於一種污水處理系統及其方法，特別是關於一種高含鹽污水處理系統及其方法。 The present invention relates to a sewage treatment system and method thereof, and more particularly to a high-salt sewage treatment system and method therefor.
一般高含鹽污水是指含有高濃度溶解性無機鹽和有機物的污水。由於水資源短缺，石油、化工、制藥等重污染行業，排放的污水往往含有高濃度的可溶性無機鹽分和難降解或有毒有機污染物，對環境造成了巨大的壓力。 Generally, high-salt sewage refers to sewage containing high concentrations of soluble inorganic salts and organic matter. Due to shortage of water resources, heavy polluting industries such as petroleum, chemical and pharmaceutical industries often contain high concentrations of soluble inorganic salts and refractory or toxic organic pollutants, which puts tremendous pressure on the environment.
目前高含鹽污水之主要處理技術包括化學藥劑添加法、酸鹼沈澱法、蒸餾法、多效蒸餾法、多級閃化法、薄膜蒸餾法、奈米過濾法、逆滲透法，及離子交換法等，對於前述的各種方法可單獨使用，也可以將不同單元組合成一複合流程，以達到對高含鹽污水脫鹽的目的。 At present, the main treatment technologies for high-salt sewage include chemical addition, acid-base precipitation, distillation, multi-effect distillation, multi-stage flash, thin film distillation, nanofiltration, reverse osmosis, and ion exchange. The method can be used alone for the above various methods, or different units can be combined into a composite process to achieve the purpose of desalting high-salt sewage.
然而，高含鹽污水的處理技術普遍存在成本高或二次污染的特點，例如：設備成本高、操作困難度高、能源消耗大、二次汙染及運維費用高等缺點，因而限制了在實際工程的應用。 However, the treatment technology of high-salt sewage generally has the characteristics of high cost or secondary pollution, such as high equipment cost, high operational difficulty, high energy consumption, secondary pollution and high operation and maintenance costs, thus limiting the actual situation. Engineering application.
因此，有必要對現有技術的高含鹽污水的處理技術進行改良，以解決現有技術的所產生的設備成本高、操作困難度高、能源消耗大、二次汙染及運維費用高等問題。 Therefore, it is necessary to improve the prior art high-salt sewage treatment technology to solve the problems of high cost, high operational difficulty, high energy consumption, secondary pollution, and high operation and maintenance cost of the prior art equipment.
本發明之主要目的在於提供一種高含鹽污水處理系統，利用流量精確調控以維持該正滲透組件二側的高汲水通量。 SUMMARY OF THE INVENTION A primary object of the present invention is to provide a high-salt sewage treatment system that utilizes precise flow regulation to maintain high turbulent water flux on both sides of the forward osmosis module.
本發明之另一要目的在於提供一種高含鹽污水處理方法，利用該廢液導電度計及驅動液導電度計的水質回饋控制，以維持該正滲透組件二側的高滲透壓差。 Another object of the present invention is to provide a high-salt sewage treatment method using the waste liquid conductivity meter and the water quality feedback control of the driving liquid conductivity meter to maintain a high osmotic pressure difference on both sides of the forward osmosis module.
為達上述之目的，本發明提供一種高含鹽污水處理系統，包含一正滲透單元及一逆滲透單元；該正滲透單元包含一第一進液管、一正滲透組件、一第一出液管、一廢液導電度計及一廢液流量計，其中該第一進液管用以導入一高含鹽污水；該正滲透組件連接該第一進液管，用以將該高含鹽污水的水分提取至一驅動液中；該第一出液管連接該正滲透組件，用以自該正滲透組件導出該高含鹽污水被提取水分後剩餘的一廢液；該廢液導電度計設置在該第一出液管上，並測量該廢液的一廢液導電度；該廢液流量計設置在該第一出液管上，並測量該廢液的一廢液流量；該逆滲透單元包含一第二進液管、一逆滲透組件、一第二出液管、一驅動液導電度計及一驅動液流量計；該第二進液管連接該正滲透組件，用以導出該正滲透組件輸出的驅動液；該逆滲透組件連接該第二進液管，用以由該驅動液分離出一再生水；該第二出液管連接在該逆滲透組件及正滲透組件之間，用以將該逆滲透組件的驅動液導回至該正滲透組件；該驅動液導電度計設置在該第二出液管上，並測量該驅動液的一驅動液導電度；該驅動液流量計設置在該第二出液管上，並測量該驅動液的一驅動液流量；其中該驅動液導電度大於該廢液導電度，並維持一滲透壓差。 To achieve the above object, the present invention provides a high-salt sewage treatment system comprising a forward osmosis unit and a reverse osmosis unit; the forward osmosis unit comprises a first inlet pipe, a forward osmosis module, and a first liquid effluent unit a waste liquid conductivity meter and a waste liquid flow meter, wherein the first liquid inlet pipe is for introducing a high-salt sewage; the forward osmosis component is connected to the first liquid inlet pipe for the high-salt sewage Extracting moisture into a driving liquid; the first liquid discharging pipe is connected to the forward osmosis unit for extracting a waste liquid remaining after the high-salt sewage is extracted with water from the forward osmosis unit; the waste liquid conductivity meter Provided on the first liquid discharge pipe, and measuring a waste liquid conductivity of the waste liquid; the waste liquid flow meter is disposed on the first liquid discharge pipe, and measuring a waste liquid flow of the waste liquid; The permeation unit comprises a second inlet tube, a reverse osmosis unit, a second outlet tube, a driving liquid conductivity meter and a driving liquid flow meter; the second inlet tube is connected to the forward osmosis unit for exporting a driving fluid output by the forward osmosis component; the reverse osmosis component is connected a second inlet pipe for separating a reclaimed water from the driving liquid; the second ejecting pipe is connected between the reverse osmosis unit and the forward osmosis unit for guiding the driving liquid of the reverse osmosis unit back to the a forward osmosis unit; the driving liquid conductivity meter is disposed on the second liquid outlet tube, and measuring a driving liquid conductivity of the driving liquid; the driving liquid flow meter is disposed on the second liquid discharging tube, and measuring the a driving liquid flow rate of the driving liquid; wherein the driving liquid conductivity is greater than the waste liquid conductivity, and maintaining an osmotic pressure difference.
在本發明之一實施例中，該驅動液導電度為該廢液導電度的3至5倍。 In an embodiment of the invention, the driving liquid conductivity is 3 to 5 times the conductivity of the waste liquid.
在本發明之一實施例中，該正滲透單元更包含一過濾器、一前置槽及一進流泵浦；該過濾器設置在該第一進液管上，用以過濾該高含鹽污水；該前置槽用以儲存該過濾器過濾之後的該高含鹽污水；該進流泵浦用以將該前置槽的高含鹽污水導入該正滲透組件。 In an embodiment of the invention, the forward osmosis unit further comprises a filter, a pre-groove and an inflow pump; the filter is disposed on the first inlet pipe for filtering the high salinity Sewage; the pre-tank is used to store the high-salt sewage after the filter is filtered; the inflow pump is used to introduce the high-salt sewage of the pre-tank into the forward osmosis module.
在本發明之一實施例中，該過濾器為全量過濾，且該過濾器的過濾精度為100微米以下。 In an embodiment of the invention, the filter is full filtered and the filter has a filtration accuracy of less than 100 microns.
在本發明之一實施例中，該逆滲透單元更包含一稀釋槽及一高壓泵浦；其中該稀釋槽設置在該第二進液管上，用以儲存經該正滲透組件稀釋的驅動液；該高壓泵浦用以將該稀釋槽的驅動液導入該逆滲透組件。 In an embodiment of the present invention, the reverse osmosis unit further comprises a dilution tank and a high pressure pump; wherein the dilution tank is disposed on the second inlet tube for storing the driving liquid diluted by the forward osmosis unit The high pressure pump is used to introduce the driving liquid of the dilution tank into the reverse osmosis unit.
在本發明之一實施例中，該逆滲透單元更包含一暫存槽及一循環泵浦；其中該暫存槽設置在該第二出液管上，用以儲存經該逆滲透組件處理的驅動液；該循環泵浦用以將該暫存槽的驅動液導入該正滲透組件。 In an embodiment of the present invention, the reverse osmosis unit further includes a temporary storage tank and a circulating pump; wherein the temporary storage tank is disposed on the second liquid discharge pipe for storing the reverse osmosis component a driving fluid; the circulating pump is configured to introduce the driving liquid of the temporary storage tank into the forward osmosis unit.
在本發明之一實施例中，該驅動液為無機類或有機鹽類，且該驅動液的固體粒徑為5微米以下。 In an embodiment of the invention, the driving liquid is an inorganic or organic salt, and the driving liquid has a solid particle diameter of 5 μm or less.
在本發明之一實施例中，該正滲透組件的一薄膜為三醋酸纖維素螺旋卷式薄膜。 In one embodiment of the invention, a film of the forward osmosis module is a cellulose triacetate spiral film.
在本發明之一實施例中，該逆滲透組件的一薄膜為具有纖維質、芳香族聚醯胺纖維或聚醯亞胺或聚呋喃材質的薄膜。 In one embodiment of the invention, a film of the reverse osmosis module is a film having a fibrous, aromatic polyamide fiber or a polyimide or polyfuran material.
為達上述之目的，本發明提供一種高含鹽污水處理方法，包含一前置步驟、一正滲透步驟及一逆滲透步驟；其中該前置步驟是對一高 含鹽污水進行過濾；該正滲透步驟是利用一正滲透組件對過濾後的高含鹽污水進行正滲透，使該高含鹽污水的水分被提取至一驅動液中而剩餘一廢液，其中該驅動液導電度大於該廢液導電度，並維持一滲透壓差；該逆滲透步驟是利用一逆滲透組件對該驅動液進行逆滲透，使該驅動液被分離出一再生水。 In order to achieve the above object, the present invention provides a high-salt sewage treatment method comprising a pre-step, a forward osmosis step and a reverse osmosis step; wherein the pre-step is a high The salt-containing sewage is filtered; the forward osmosis step is to positively osmosis the filtered high-salt sewage by using a forward osmosis module, so that the moisture of the high-salt sewage is extracted into a driving liquid and a waste liquid remains, wherein The driving liquid conductivity is greater than the waste liquid conductivity, and maintains an osmotic pressure difference; the reverse osmosis step uses a reverse osmosis module to reverse osmosis the driving liquid, so that the driving liquid is separated into a reclaimed water.
如上所述，利用流量精確調控及該廢液導電度計及驅動液導電度計的水質回饋控制，使該驅動液導電度大於該廢液導電度，並維持一滲透壓差，進而縮小該高含鹽污水經該正滲透組件處理後之鹽度濃縮的變化，以及與驅動液之鹽度稀釋的變化，而能夠維持該正滲透組件二側的高滲透壓差及高汲水通量。 As described above, the precise control of the flow rate and the water quality feedback control of the waste liquid conductivity meter and the driving liquid conductivity meter make the conductivity of the driving liquid greater than the conductivity of the waste liquid, and maintain an osmotic pressure difference, thereby reducing the height. The change of the salinity concentration of the salty sewage treated by the forward osmosis unit and the change of the salinity dilution with the driving liquid can maintain the high osmotic pressure difference and the high turbulent water flux on the two sides of the forward osmosis unit.
100‧‧‧高含鹽污水處理系統 100‧‧‧High-salt sewage treatment system
101‧‧‧高含鹽污水槽 101‧‧‧High salt wastewater tank
102‧‧‧再生水槽 102‧‧‧Regeneration sink
2‧‧‧正滲透單元 2‧‧‧Positive infiltration unit
21‧‧‧第一進液管 21‧‧‧First inlet tube
22‧‧‧正滲透組件 22‧‧‧Positive infiltration components
23‧‧‧第一出液管 23‧‧‧First outlet tube
24‧‧‧廢液導電度計 24‧‧‧Waste conductivity meter
25‧‧‧廢液流量計 25‧‧‧Waste flowmeter
26‧‧‧過濾器 26‧‧‧Filter
27‧‧‧前置槽 27‧‧‧ front slot
28‧‧‧進流泵浦 28‧‧‧ Inflow pump
3‧‧‧逆滲透單元 3‧‧‧ reverse osmosis unit
31‧‧‧第二進液管 31‧‧‧Second inlet tube
32‧‧‧逆滲透組件 32‧‧‧ reverse osmosis components
33‧‧‧第二出液管 33‧‧‧Second outlet tube
34‧‧‧驅動液導電度計 34‧‧‧Drive liquid conductivity meter
35‧‧‧驅動液流量計 35‧‧‧Drive liquid flowmeter
36‧‧‧稀釋槽 36‧‧‧Dilution tank
37‧‧‧高壓泵浦 37‧‧‧High pressure pump
38‧‧‧暫存槽 38‧‧‧Scratch slot
39‧‧‧循環泵浦 39‧‧‧Circulating pump
S201‧‧‧前置步驟 S201‧‧‧Pre-steps
S202‧‧‧正滲透步驟 S202‧‧‧Positive infiltration step
S203‧‧‧逆滲透驟 S203‧‧‧ reverse osmosis
第1圖是說明本發明之高含鹽污水處理系統的一較佳實施例的結構示意圖；及第2圖是說明本發明之高含鹽污水處理方法的一較佳實施例的流程圖。 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a preferred embodiment of the high-salt sewage treatment system of the present invention; and Figure 2 is a flow chart showing a preferred embodiment of the high-salt sewage treatment method of the present invention.
為了讓本發明之上述及其他目的、特徵、優點能更明顯易懂，下文將特舉本發明較佳實施例，並配合所附圖式，作詳細說明如下。再者，本發明所提到的方向用語，例如上、下、頂、底、前、後、左、右、內、外、側面、周圍、中央、水平、橫向、垂直、縱向、軸向、徑向、最上層或最下層等，僅是參考附加圖式的方向。因此，使用的方向用語是用以說明及理解本發明，而非用以限制本發明。 The above and other objects, features and advantages of the present invention will become more <RTIgt; Furthermore, the directional terms mentioned in the present invention, such as upper, lower, top, bottom, front, rear, left, right, inner, outer, side, surrounding, central, horizontal, horizontal, vertical, longitudinal, axial, Radial, uppermost or lowermost, etc., only refer to the direction of the additional schema. Therefore, the directional terminology used is for the purpose of illustration and understanding of the invention.
請參照第1圖所示，本發明之高含鹽污水處理系統100的一較佳實施例，該高含鹽污水處理系統100包含一正滲透單元2及一逆滲透單元3，是一種利用正滲透薄膜的高含鹽污水回收並結合逆滲透薄膜的驅動液循環再使用進行處理。本發明將於下文詳細說明各元件的細部構造、組裝關係及其運作原理。 Referring to FIG. 1, a preferred embodiment of the high-salt sewage treatment system 100 of the present invention, the high-salt sewage treatment system 100 includes a forward osmosis unit 2 and a reverse osmosis unit 3, which is a positive utilization The high-salt sewage from the permeable membrane is recovered and recycled in combination with the driving liquid of the reverse osmosis membrane. The detailed construction, assembly relationship, and operation principle of each element will be described in detail below.
續參照第1圖所示，該正滲透單元2包含一第一進液管21、一正滲透組件22、一第一出液管23、一廢液導電度計24、一廢液流量計25、一過濾器26、一前置槽27及二進流泵浦28。其中該第一進液管21用以導入一高含鹽污水槽101的一高含鹽污水；該正滲透組件22連接該第一進液管21，該正滲透組件22用以將該高含鹽污水的水分提取至一驅動液中；該第一出液管23連接該正滲透組件22，該正滲透組件22用以自該正滲透組件22導出該高含鹽污水被提取水分後剩餘的一廢液；該廢液導電度計24設置在該第一出液管23上，並測量該廢液的一廢液導電度；該廢液流量計25設置在該第一出液管23上，並測量該廢液的一廢液流量；該過濾器26設置在該第一進液管21上，用以過濾該高含鹽污水；該前置槽27用以儲存該過濾器26過濾之後的該高含鹽污水；該等進流泵浦28分別設置在該過濾器26之前及該前置槽27之後，用以將該前置槽27的高含鹽污水導入該正滲透組件22中。 Referring to FIG. 1 , the forward osmosis unit 2 includes a first liquid inlet tube 21 , a forward osmosis unit 22 , a first liquid outlet tube 23 , a waste liquid conductivity meter 24 , and a waste liquid flow meter 25 . A filter 26, a front slot 27 and a two-inlet pump 28 are provided. The first inlet pipe 21 is used to introduce a high-salt sewage of a high-salt sewage tank 101; the forward osmosis unit 22 is connected to the first inlet pipe 21, and the forward osmosis unit 22 is used to The water of the salt water is extracted into a driving liquid; the first liquid discharging pipe 23 is connected to the forward osmosis unit 22, and the forward osmosis unit 22 is configured to derive from the forward osmosis unit 22 the remaining water after the high-salt sewage is extracted. a waste liquid; the waste liquid conductivity meter 24 is disposed on the first liquid discharge pipe 23, and measures a waste liquid conductivity of the waste liquid; the waste liquid flow meter 25 is disposed on the first liquid discharge pipe 23. And measuring a waste liquid flow rate of the waste liquid; the filter 26 is disposed on the first liquid inlet pipe 21 for filtering the high-salt sewage; the front groove 27 is used for storing the filter 26 after filtering The high-salt sewage; the inflow pumps 28 are disposed before the filter 26 and after the pre-groove 27, respectively, for introducing the high-salt sewage of the pre-groove 27 into the forward-permeability component 22 .
續參照第1圖所示，在本實施例中，該過濾器為全量過濾，且該過濾器的過濾精度為100微米以下；該驅動液為無機類或有機鹽類，且較佳地，該驅動液的固體粒徑為5微米以下；另外，該正滲透組件22的一薄膜為三醋酸纖維素及其衍生物之混合材質的螺旋卷式薄膜，可作為緻密過 濾層及多孔隙支撐層，而多孔隙支撐層嵌入聚酯網以提升機械支撐強度，該薄膜之PH值為3至8，使用溫度為0度至43度，滲透通量為9L/m2h。 Continuing to refer to FIG. 1, in the present embodiment, the filter is a full amount of filtration, and the filtration precision of the filter is 100 micrometers or less; the driving liquid is an inorganic or organic salt, and preferably, the filter The driving liquid has a solid particle diameter of 5 μm or less; in addition, a film of the forward osmosis unit 22 is a spiral wound film of a mixed material of cellulose triacetate and a derivative thereof, and can be used as a dense filter layer and a porous support layer. The porous support layer is embedded in the polyester mesh to increase the mechanical support strength. The film has a pH of 3 to 8, a use temperature of 0 to 43 degrees, and a permeation flux of 9 L/m 2 h.
續參照第1圖所示，該逆滲透單元3包含一第二進液管31、一逆滲透組件32、一第二出液管33、一驅動液導電度計34及一驅動液流量計35、一稀釋槽36、一高壓泵浦37、一暫存槽38及一循環泵浦39。其中該第二進液管31連接該正滲透組件22，該第二進液管31用以導出該正滲透組件22輸出的驅動液；該逆滲透組件32連接該第二進液管31，該逆滲透組件32用以由該驅動液分離出一再生水，並將該再生水儲存至一再生水槽102；該第二出液管33連接在該逆滲透組件32及正滲透組件22之間，該第二出液管33用以將該逆滲透組件32的驅動液導回至該正滲透組件22；該驅動液導電度計34設置在該第二出液管33上，並測量該驅動液的一驅動液導電度；該驅動液流量計35設置在該第二出液管33上，並測量該驅動液的一驅動液流量；該稀釋槽36設置在該第二進液管31上，該稀釋槽36用以儲存經該正滲透組件22稀釋的驅動液；該高壓泵浦37用以將該稀釋槽36的驅動液導入該逆滲透組件32；該暫存槽38設置在該第二出液管33上，該暫存槽38用以儲存經該逆滲透組件32處理的驅動液；該循環泵浦39用以將該暫存槽38的驅動液導入該正滲透組件22。 Referring to FIG. 1 , the reverse osmosis unit 3 includes a second liquid inlet tube 31 , a reverse osmosis unit 32 , a second liquid outlet tube 33 , a driving liquid conductivity meter 34 , and a driving liquid flow meter 35 . A dilution tank 36, a high pressure pump 37, a temporary storage tank 38 and a circulation pump 39. The second inlet pipe 31 is connected to the forward osmosis unit 22 for guiding the driving liquid outputted by the forward osmosis unit 22; the reverse osmosis unit 32 is connected to the second inlet tube 31, The reverse osmosis unit 32 is configured to separate a reclaimed water from the driving liquid, and store the reclaimed water in a regenerating water tank 102; the second ejecting tube 33 is connected between the reverse osmosis unit 32 and the forward osmosis unit 22, The second liquid discharge pipe 33 is configured to guide the driving liquid of the reverse osmosis unit 32 back to the forward osmosis unit 22; the driving liquid conductivity meter 34 is disposed on the second liquid discharge pipe 33, and measure one of the driving liquids. Driving liquid conductivity; the driving liquid flow meter 35 is disposed on the second liquid discharge pipe 33, and measuring a driving liquid flow rate of the driving liquid; the dilution tank 36 is disposed on the second liquid inlet pipe 31, the dilution The tank 36 is configured to store the driving liquid diluted by the forward osmosis unit 22; the high pressure pump 37 is used to introduce the driving liquid of the dilution tank 36 into the reverse osmosis unit 32; the temporary storage tank 38 is disposed at the second liquid discharging unit On the tube 33, the temporary storage tank 38 is configured to store the driving liquid processed by the reverse osmosis unit 32; Pump 39 for temporarily storing the driving liquid tank 38 is introduced into the positive osmotic assembly 22.
續參照第1圖所示，在本實施例中，該驅動液導電度係大於該廢液導電度，並且維持一滲透壓差，較佳地，該驅動液導電度為該廢液導電度的3至5倍；另外，該逆滲透組件的一薄膜為具有纖維質、芳香族聚醯胺纖維或聚醯亞胺或聚呋喃材質的薄膜，其形狀結構可為螺旋卷型、中空纖維型或管狀型，且耐氯性高。 Referring to FIG. 1 , in the embodiment, the conductivity of the driving liquid is greater than the conductivity of the waste liquid, and maintains an osmotic pressure difference. Preferably, the conductivity of the driving liquid is the conductivity of the waste liquid. 3 to 5 times; in addition, a film of the reverse osmosis component is a film having a fibrous, aromatic polyamide fiber or a polyimide or a polyfuran, and the shape structure thereof may be a spiral wound type, a hollow fiber type or Tubular type with high chlorine resistance.
依據上述的結構，先利用該過濾器26對該高含鹽污水進行保險式的初步固液分離，以收集無大顆粒雜質的高含鹽污水；接著利用該進流泵浦28將該高含鹽污水導入該正滲透組件22中，該正滲透組件22的薄膜用於對該高含鹽污水進行正滲透汲水處理，並且透過該正滲透組件22的薄膜二側的滲透壓差，促使該高含鹽污水的水分進入該驅動液中；該驅動液因加入水分而被稀釋並儲存至該稀釋槽36，再利用該高壓泵浦37將該驅動液導入該逆滲透組件32中；藉由該逆滲透組件32的逆滲透作用，將被稀釋的驅動液分離成該再生水及原來的驅動液(也就是重新濃縮被稀釋的驅動液)，而獲得的再生水在儲存至該再生水槽102供適當使用；另外，驅動液則進入該暫存槽38，並經該循環泵浦39重新將該驅動液導入該正滲透組件22，而進行長期的重複使用。 According to the above structure, the high-salt sewage is first subjected to the insurance preliminary solid-liquid separation by the filter 26 to collect the high-salt sewage without large particle impurities; and then the high-inclusion pump 28 is used to The salt water is introduced into the forward osmosis unit 22, and the membrane of the forward osmosis unit 22 is used for the forward osmosis water treatment of the high salinity sewage, and the osmotic pressure difference across the two sides of the membrane of the forward osmosis unit 22 is promoted. The moisture of the high-salt sewage enters the driving liquid; the driving liquid is diluted by the addition of moisture and stored in the dilution tank 36, and the driving liquid is introduced into the reverse osmosis unit 32 by the high-pressure pump 37; The reverse osmosis of the reverse osmosis unit 32 separates the diluted driving liquid into the regenerated water and the original driving liquid (that is, re-concentrates the diluted driving liquid), and the obtained regenerated water is stored in the regenerating water tank 102 for appropriate In addition, the driving liquid enters the temporary storage tank 38, and the driving liquid is re-introduced into the forward osmosis unit 22 via the circulating pump 39 for long-term repeated use.
藉由上述的設計，利用流量精確調控及該廢液導電度計24及驅動液導電度計34的水質回饋控制，使該驅動液導電度大於該廢液導電度，並維持一滲透壓差，進而縮小該高含鹽污水經該正滲透組件22處理後之鹽度濃縮的變化(廢液導電度計24)，以及與驅動液之鹽度稀釋的變化(驅動液導電度計34)，而能夠維持該正滲透組件22二側的高滲透壓差及高汲水通量。例如：不額外提供壓力之條件下，該正滲透組件22的薄膜在該驅動液導電度為廢液導電度之3.3倍時達到最高，其滲透通量為6.2L/m2h。另外，由於該逆滲透單元3的驅動液組成單純且不析出結晶或沈澱於薄膜上，可避免該逆滲透組件32的薄膜阻塞的問題，同時可長期重複使用，並不會產生廢棄的濃縮液而造成再處理之壓力或二次汙染；同時配合該正滲透單元2的正滲透技術也可達到低耗能、高回收率、低薄膜汙染等優點。 With the above design, the precise control of the flow rate and the water quality feedback control of the waste liquid conductivity meter 24 and the driving liquid conductivity meter 34 make the conductivity of the driving liquid greater than the conductivity of the waste liquid and maintain an osmotic pressure difference. Further reducing the change in salinity concentration of the high-salt sewage treated by the forward osmosis unit 22 (waste conductivity meter 24), and the change in salinity dilution with the driving liquid (driving liquid conductivity meter 34), The high osmotic pressure difference and high turbulent water flux on both sides of the forward osmosis unit 22 can be maintained. For example, the film of the forward osmosis element 22 reaches a maximum when the conductivity of the driving liquid is 3.3 times that of the waste liquid without additional pressure, and the permeation flux is 6.2 L/m 2 h. In addition, since the driving liquid composition of the reverse osmosis unit 3 is simple and does not precipitate crystals or precipitate on the film, the problem of film clogging of the reverse osmosis unit 32 can be avoided, and the use can be repeated for a long period of time without generating a waste concentrate. The pressure or secondary pollution caused by reprocessing can also achieve the advantages of low energy consumption, high recovery rate, low film pollution and the like by the forward osmosis technology of the positive osmosis unit 2.
參閱第2圖並配合第1圖所示，本發明之高含鹽污水處理方法的一較佳實施例，藉由上述實施例的高含鹽污水處理系統100利用正滲透薄膜的高含鹽污水回收並結合逆滲透薄膜的驅動液循環再使用進行處理。該高含鹽污水處理方法包含步驟：一前置步驟S201、一正滲透步驟S202及一逆滲透步驟S203。本發明將於下文對各步驟詳細說明。 Referring to Fig. 2 and in conjunction with Fig. 1, a preferred embodiment of the method for treating high salinity sewage of the present invention utilizes the high salinity sewage of the forward osmosis membrane by the high salinity sewage treatment system 100 of the above embodiment. The recovery liquid combined with the reverse osmosis membrane is recycled and reused for treatment. The high-salt sewage treatment method comprises the steps of: a pre-step S201, a forward osmosis step S202 and a reverse osmosis step S203. The present invention will be described in detail below with respect to each step.
續參閱第2圖所示，在該前置步驟S201中，是對一高含鹽污水進行過濾，其中該過濾器26對該高含鹽污水進行保險式的初步固液分離，以收集無大顆粒雜質的高含鹽污水。 Continuing to refer to FIG. 2, in the pre-step S201, a high-salt sewage is filtered, wherein the filter 26 performs an insurance preliminary solid-liquid separation on the high-salt sewage to collect no large High-salt sewage with particulate impurities.
續參閱第2圖所示，在該正滲透步驟S202中，是利用一正滲透組件22對過濾後的高含鹽污水進行正滲透，使該高含鹽污水的水分被提取至一驅動液中而剩餘一廢液，其中該驅動液導電度大於該廢液導電度，並維持一滲透壓差，接著該驅動液因加入水分而被稀釋並儲存至該稀釋槽36，再利用該高壓泵浦37將該驅動液導入一逆滲透組件32中。 Continuing to refer to FIG. 2, in the forward osmosis step S202, the filtered high-salt sewage is subjected to forward osmosis by a forward osmosis unit 22, so that the moisture of the high-salt sewage is extracted into a driving liquid. And a remaining waste liquid, wherein the driving liquid has a conductivity greater than the waste liquid conductivity, and maintains an osmotic pressure difference, and then the driving liquid is diluted by the addition of moisture and stored in the dilution tank 36, and the high-pressure pump is utilized. The driving liquid is introduced into a reverse osmosis unit 32.
續參閱第2圖所示，該逆滲透步驟S203中，是利用該逆滲透組件32對該驅動液進行逆滲透，將被稀釋的驅動液分離成一再生水及原來的驅動液，而獲得的再生水在儲存至該再生水槽102供適當使用。 Referring to FIG. 2, in the reverse osmosis step S203, the reverse osmosis unit 32 is used for reverse osmosis, and the diluted driving liquid is separated into a regenerated water and an original driving liquid, and the reclaimed water obtained is obtained. It is stored in the regenerative water tank 102 for proper use.
如上所述，利用流量精確調控及該廢液導電度計24及驅動液導電度計34的水質回饋控制，使該驅動液導電度大於該廢液導電度，並維持一滲透壓差，進而縮小該高含鹽污水經該正滲透組件22處理後之鹽度濃縮的變化，以及與驅動液之鹽度稀釋的變化，而能夠維持該正滲透組件22二側的高滲透壓差及高汲水通量。 As described above, the precise control of the flow rate and the water quality feedback control of the waste liquid conductivity meter 24 and the driving liquid conductivity meter 34 make the conductivity of the driving liquid greater than the conductivity of the waste liquid, and maintain an osmotic pressure difference, thereby reducing The change in salinity concentration of the high-salt sewage treated by the forward osmosis unit 22 and the change in salinity dilution with the driving liquid can maintain a high osmotic pressure difference and high water pressure on both sides of the forward osmosis unit 22 Flux.
雖然本發明已以較佳實施例揭露，然其並非用以限制本發 明，任何熟習此項技藝之人士，在不脫離本發明之精神和範圍內，當可作各種更動與修飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. It is to be understood that the scope of the present invention is defined by the scope of the appended claims.
100‧‧‧高含鹽污水處理系統 100‧‧‧High-salt sewage treatment system
101‧‧‧高含鹽污水槽 101‧‧‧High salt wastewater tank
102‧‧‧再生水槽 102‧‧‧Regeneration sink
2‧‧‧正滲透單元 2‧‧‧Positive infiltration unit
21‧‧‧第一進液管 21‧‧‧First inlet tube
22‧‧‧正滲透組件 22‧‧‧Positive infiltration components
23‧‧‧第一出液管 23‧‧‧First outlet tube
24‧‧‧廢液導電度計 24‧‧‧Waste conductivity meter
25‧‧‧廢液流量計 25‧‧‧Waste flowmeter
26‧‧‧過濾器 26‧‧‧Filter
27‧‧‧前置槽 27‧‧‧ front slot
28‧‧‧進流泵浦 28‧‧‧ Inflow pump
3‧‧‧逆滲透單元 3‧‧‧ reverse osmosis unit
31‧‧‧第二進液管 31‧‧‧Second inlet tube
32‧‧‧逆滲透組件 32‧‧‧ reverse osmosis components
33‧‧‧第二出液管 33‧‧‧Second outlet tube
34‧‧‧驅動液導電度計 34‧‧‧Drive liquid conductivity meter
35‧‧‧驅動液流量計 35‧‧‧Drive liquid flowmeter
36‧‧‧稀釋槽 36‧‧‧Dilution tank
37‧‧‧高壓泵浦 37‧‧‧High pressure pump
38‧‧‧暫存槽 38‧‧‧Scratch slot
39‧‧‧循環泵浦 39‧‧‧Circulating pump
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| CN109999673A (en) * | 2019-05-08 | 2019-07-12 | 上海凯鑫分离技术股份有限公司 | A kind of wound membrane element |
| CN109999673B (en) * | 2019-05-08 | 2024-02-13 | 上海凯鑫分离技术股份有限公司 | Rolling type membrane element |
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