TWI796894B - Forward-osmosis concentration device and concentrating method - Google Patents

Abstract

A forward-osmosis concentration device includes a first cavity and a second cavity. The first cavity has a first forward osmosis membrane to divide the first cavity into a first chamber and a second chamber. The second cavity has a second forward osmosis membrane to divide the second cavity into a third chamber and a fourth chamber. The inlet of the first chamber is used to receive a feed solution containing the to-be-concentrated components, and its outlet is connected with the inlet of the third chamber to transport the feed solution from the first chamber to the third chamber. The outlet of the chamber is used to discharge the concentrated feed solution. The inlet of the fourth chamber is used to receive a draw solution, and the outlet is connected with the inlet of the second chamber to transport the draw solution from the fourth chamber to the second chamber, and the outlet of the second chamber is used to discharge the diluted draw solution.

Description

Forward osmosis concentration device and concentration method

The present invention relates to an aqueous solution concentration technology, and in particular to a forward osmosis concentration device and concentration method.

The global available water resources are decreasing day by day, which will be a major problem for all countries in the next 5 to 10 years. The water in industrial and people's livelihood waste liquid will be an important source of water resources at that time, so the valuable substances in the waste liquid are concentrated and taken out Clean moisture is also becoming a trend.

The high-tech electronics industry has been facing the problem of waste liquid treatment for a long time, and the amount of organic waste liquid produced is increasing year by year. In particular, a variety of high-solubility organic solvents are used in the manufacturing process to wash the wafers, resulting in a large amount of waste liquid, but there is no effective way to solve a large number of them. concentration of water-soluble organic solvent waste. Because the concentration of the waste liquid produced is not enough to be reused as a solvent, and the waste water field is unwilling to receive it directly. Taking the low-concentration isopropanol waste liquid produced in the semiconductor manufacturing process as an example, because the concentration is too low (8-20%), it is not cost-effective to use the existing distillation technology for solvent recovery, and the thin-film separation technology is also difficult to treat, and the waste water field is willing to recycle Low, can only be incinerated. Therefore, there is an urgent need for a technology that can properly treat the above-mentioned waste liquid.

The invention provides a forward osmosis concentration device, which can achieve high-efficiency concentration.

The present invention also provides a forward osmosis concentration device, which can calculate the concentration efficiency index through the monitoring results, and make condition optimization judgments, so as to achieve system control and increase the concentration effect.

The present invention also provides a concentration method using the above-mentioned forward osmosis concentration device.

The forward osmosis concentration device of the present invention includes a first cavity and a second cavity. The first chamber has a first forward osmosis membrane to separate the first chamber into a first chamber and a second chamber, wherein the first chamber has a first inlet and a first outlet, and the second chamber The chamber has a second inlet and a second outlet. The second chamber has a second forward osmosis membrane to separate the second chamber into a third chamber and a fourth chamber, wherein the third chamber has a third inlet and a third outlet, and the fourth chamber The chamber has a fourth entrance and a fourth exit. The first inlet is used to receive the feed solution (feed solution, FS) containing the concentrated components, and the first outlet is connected to the third inlet for feeding the feed solution from the first chamber The chamber is delivered to the third chamber, and the third outlet is used to discharge the concentrated feed liquid. The fourth inlet is used to receive a draw solution (draw solution, DS), and the fourth outlet is connected to the second inlet to transport the draw solution from the fourth chamber to the second chamber, the second outlet is used to discharge the diluted extraction solution.

Another forward osmosis concentration device of the present invention includes a first forward osmosis module and a second forward osmosis module. The first forward osmosis module includes a feed tank, a first chamber body and the first feed liquid transfer line. The feed tank has a feed liquid inlet and a feed liquid outlet. The first chamber has a first forward osmosis membrane to separate the first chamber into a first chamber and a second chamber, the first chamber has a first inlet and a first outlet, and the second chamber It has a second inlet and a second outlet, wherein the first inlet is connected to the feed liquid outlet for receiving the feed liquid from the feed tank. The first feed liquid transmission line is connected to the first outlet, wherein the first feed liquid transmission line includes parallel first and second branch lines and a first switch element arranged on the first branch line, wherein The second branch line is connected to the feed tank, so that the feed liquid concentrated in the first chamber flows back to the feed tank, and the concentrated component of the first switch element in the concentrated feed liquid reaches Turns on after a first predetermined concentration. The second forward osmosis module includes a concentrated feed tank, a second cavity, and a second feed liquid transmission line. The rich feed tank has a rich feed tank inlet and a rich feed tank outlet. The second chamber has a second forward osmosis membrane to separate the second chamber into a third chamber and a fourth chamber, the third chamber has a third inlet and a third outlet, and the fourth chamber It has a fourth inlet and a fourth outlet, wherein the third inlet is connected to the first branch pipeline for receiving the feed liquid in which the concentrated component reaches the first predetermined concentration, and the first The three outlets are connected to the inlet of the concentrated feed tank for conveying the feed liquid. The second feed liquid transmission line is connected to the outlet of the concentrated feed tank, wherein the second feed liquid transmission line includes the third and fourth branch lines connected in parallel and the second branch line arranged on the third branch line. A switch element, wherein the fourth branch line is connected to the third inlet through the first branch line, so that the feed liquid in the concentrated feed tank flows back to the third chamber, and the second switch The concentrated component of the element in the concentrated feed solution reaches a second predetermined Open after concentration to discharge the concentrated feed liquid. The fourth inlet is used to receive the extraction solution, the fourth outlet is connected to the second inlet to transport the extraction solution from the fourth chamber to the second chamber, and the second outlet is used to discharge the diluted of the extract.

The concentration method of the present invention is to use the above-mentioned forward osmosis concentration device, including performing the first-stage concentration, circulating the feed liquid into the first chamber, and utilizing the osmotic pressure difference of the extraction liquid in the second chamber The moisture in the feed liquid is passed through the first forward osmosis membrane to the second chamber until the concentration of the concentrated components in the feed liquid reaches a first predetermined concentration. Then, the first switch element is turned on, so that the feed liquid that has been concentrated in the first stage enters the third chamber, and then the second stage is concentrated, so that the feed liquid is circulated into the third chamber, and the fourth stage is used to The osmotic pressure difference of the extraction solution in the chamber causes moisture to pass through the second forward osmosis membrane to the fourth chamber until the concentration of the concentrated component in the feed solution reaches a second predetermined concentration, wherein the second predetermined concentration greater than the first predetermined concentration, and the concentration of the extraction solution in the fourth chamber is greater than the concentration of the extraction solution in the second chamber.

Based on the above, the device according to the present invention can design a continuous or batch concentration device with a segmented forward osmosis system to achieve high-efficiency concentration. In addition, if it is combined with real-time monitoring technology and program control optimization method at each stage, the concentration efficiency can be further improved. Moreover, each stage can be equipped with real-time monitoring components for real-time online continuous monitoring. Calculate the concentration efficiency index through the monitoring results, and make condition optimization judgments to greatly improve the concentration effect.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the following special citations Embodiments, together with the accompanying drawings, are described in detail as follows.

100, 200, 300, 400, 500, 600, 700: forward osmosis concentration device

102, 504: the first cavity

104, 514: the second cavity

106, 506: the first chamber

108, 508: the second chamber

110, 516: the third chamber

112, 518: the fourth chamber

202, 604: the third cavity

204, 606: fifth chamber

206, 608: the sixth chamber

302, 502: Feed chute

304, 512: thick feed tank

306: discharge pipe

402: Processor

503, 513, 603, 703, 713: pump

505, 515, 605, 705, 715: branch lines with switches

510: first feed liquid transfer line

520: second feed liquid transfer line

602: temporary storage slot

610: contact

702: extraction tank

704: the first extraction solution transfer line

706: dilution tank

708: the second extraction liquid transmission line

800, 802, 804, 806, 808, 810, 812, 814, 816, 818: steps

BP1: the first branch pipeline

BP2: The second branch pipeline

BP3: The third branch pipeline

BP4: The fourth branch pipeline

BP5: fifth branch pipeline

BP6: The sixth branch pipeline

BP7: seventh branch pipeline

BP8: Eighth branch pipeline

C1, C2, C3, C4: conductivity meter

D _in : Extraction inlet

D _out : Extraction outlet

DD _in : inlet of dilution tank

DD _out : Dilution tank outlet

F1, F2, F3, F4: flow meter

F _in : feed liquid inlet

F _out : Feed liquid outlet

FO1: the first forward osmosis membrane

FO2: the second forward osmosis membrane

FO3: the third forward osmosis membrane

FOM1: The first forward osmosis module

FOM2: The second forward osmosis module

FOM3: The third forward osmosis module

In1: the first entrance

In2: Second entrance

In3: the third entrance

In4: the fourth entrance

In5: fifth entrance

In6: the sixth entrance

Out1: the first exit

Out2: the second exit

Out3: the third exit

Out4: the fourth exit

Out5: the fifth exit

Out6: the sixth exit

P1, P2, P3, P4: pressure gauge

P _in : Inlet of thick feed tank

P _out : Outlet of thick feed tank

S1, S2, S3, S4, S5: concentration sensor

SW1: first switching element

SW2: second switching element

SW3: The third switching element

SW4: Fourth switching element

SW5: fifth switching element

T: monitoring element

TS _in : Temporary storage slot entry

TS _out : Temporary storage slot exit

W1, W2: weight sensor

Fig. 1 is a schematic diagram of a forward osmosis concentration device according to the first embodiment of the present invention.

Fig. 2 is a schematic diagram of a forward osmosis concentration device according to the second embodiment of the present invention.

Fig. 3 is a schematic diagram of a forward osmosis concentration device according to the third embodiment of the present invention.

Fig. 4 is a schematic diagram of a forward osmosis concentration device according to a fourth embodiment of the present invention.

Fig. 5 is a schematic diagram of a forward osmosis concentration device according to a fifth embodiment of the present invention.

Fig. 6 is a schematic diagram of a forward osmosis concentration device according to the sixth embodiment of the present invention.

Fig. 7 is a schematic diagram of a forward osmosis concentration device according to the seventh embodiment of the present invention.

Fig. 8 is a step chart of concentration optimization using the forward osmosis concentration device in Fig. 7 .

Fig. 9 is a graph of real-time monitoring of water flux and extract concentration per second for Experimental Example 1.

The attached drawings in the following embodiments are for more complete description of the embodiments of the present invention, however, the present invention can still be implemented in many different forms, not limited to the described embodiments. Furthermore, for the sake of clarity, relative distances, sizes and positions of various devices or conduits are not drawn to scale.

Fig. 1 is a schematic diagram of a forward osmosis concentration device according to the first embodiment of the present invention.

Referring to FIG. 1 , the forward osmosis concentration device 100 of this embodiment includes a first chamber 102 and a second chamber 104 . The first chamber 102 has a first forward osmosis membrane FO1 to divide the first chamber 102 into a first chamber 106 and a second chamber 108, wherein the first chamber 106 has a first inlet In1 and a first outlet Out1, and the first chamber 106 has a first inlet In1 and a first outlet Out1. The second chamber 108 has a second inlet In2 and a second outlet Out2. The second chamber 104 has a second forward osmosis membrane FO2 to separate the second chamber 104 into a third chamber 110 and a fourth chamber 112, wherein the third chamber 110 has a third inlet In3 and a third outlet Out3, and the third chamber 110 has a third inlet In3 and a third outlet Out3, The four chambers 112 have a fourth inlet In4 and a fourth outlet Out4.

In this embodiment, the first forward osmosis membrane FO1 and the second forward osmosis membrane FO2 can use asymmetric membranes, composite membranes, inorganic ceramic membranes, or mixed matrix membranes, enumerating but not limited to: Hydration Technology Innovations)’s cellulose triacetate membrane (asymmetric membrane organic polymer film), Porifera, Inc.’s PFO series membrane (composite membrane), Aquaporin A/S’ Aquaporin Inside® series membrane (mixed matrix membrane), etc. The first inlet In1 is used to receive the feed liquid containing the concentrated components. The first outlet Out1 is connected with the third inlet In3 to feed the The liquid is delivered from the first chamber 106 to the third chamber 110, and the third outlet Out3 is used to discharge the concentrated feed liquid.

The types of feed liquids can be divided into three categories: waste water-soluble organic solvents in the technology industry or other applications that require concentration of water-soluble organic solvents, organic substances, and inorganic solutions. The components of the above-mentioned water-soluble organic solvents are for example but not limited to methanol, ethanol, 1-propanol, isopropanol, tertiary butanol, ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1 ,3-butanediol, 1,4-butanediol, 1,5-pentanediol, triethylene glycol, acetaldehyde, acetone, formic acid, acetic acid, propionic acid, butyric acid, acetonitrile, diethanolamine, 2,2 '-diamine diethylamine, dimethylformamide, N-methyldiethanolamine, ethylene glycol monobutyl ether, ethylene glycol dimethyl ether, 1,4-dioxane, pyridine, N-methyl pyrrolidone, dimethylsulfone, or tetrahydrofuran. The above-mentioned organic substances refer to liquid organic substances containing water or dissolved in water, such as food, fruit juice, beverages, nutritional products, protein, microalgae, volatile fatty acids, urea, etc., which can be used as feed liquid to remove water for reuse or organic After the substance is concentrated, its value is increased and its use is increased. The above-mentioned inorganic solution is an aqueous solution containing inorganic compounds, inorganic metals, or inorganic salts, such as seawater, industrial wastewater, and the like.

Please continue to refer to FIG. 1, the fourth inlet In4 is used to receive the extraction liquid, the fourth outlet Out4 is connected to the second inlet In2, and is used to transport the extraction liquid from the fourth chamber 112 to the second chamber 108, and the second outlet Out2 Used to discharge the diluted extract. This embodiment belongs to a continuous forward osmosis concentration device 100, wherein the concentration of the feed liquid entering the first chamber 106 is relatively low, and the concentration of the feed liquid entering the third chamber 110 is relatively high; The extraction solution in the fourth chamber 112 has a higher concentration, and the extraction solution entering the second chamber 108 has a lower concentration. Therefore, the feed liquid in the first cavity 102 The osmotic pressure difference between the extraction liquid and the feed liquid in the second chamber 104 can be maintained at the same or similar level as the osmotic pressure difference between the feed liquid and the extraction liquid, so as to improve the concentration efficiency.

Fig. 2 is a schematic diagram of a forward osmosis concentration device according to the second embodiment of the present invention, wherein the same components are represented by the element symbols and technical terms of the first embodiment, and the description of the same components can refer to the above-mentioned first embodiment The relevant content of the example will not be repeated here.

Please refer to FIG. 2 , the forward osmosis concentration device 200 of this embodiment adds at least one third cavity 202 to the device of the first embodiment, and is arranged between the first cavity 102 and the second cavity 104 . The third chamber 202 has a third forward osmosis membrane FO3 to separate the third chamber 202 into a fifth chamber 204 and a sixth chamber 206, wherein the fifth chamber 204 is between the first outlet Out1 and the third inlet In3 Between, to concentrate the feed liquid. The sixth chamber 206 is located between the fourth outlet Out4 and the second inlet In2 for delivering the extraction liquid. That is to say, the fifth inlet In5 of the fifth chamber 204 is connected with the first outlet Out1, the fifth outlet Out5 of the fifth chamber 204 is connected with the third inlet In3; the sixth inlet In6 of the sixth chamber 206 is connected with the first outlet Out1; The four outlets Out4 are connected, and the sixth outlet Out6 of the sixth chamber 206 is connected to the second inlet In2. Moreover, although FIG. 2 only shows one third cavity 202, the number of third cavities 202 may be multiple, depending on how many stages the concentration process is divided into.

Fig. 3 is a schematic diagram of a forward osmosis concentration device according to the third embodiment of the present invention, wherein the same components are represented by the element symbols and technical terms of the first embodiment, and the description of the same components can refer to the above-mentioned first embodiment The relevant content of the example will not be repeated here.

Please refer to FIG. 3 , the forward osmosis concentration device 300 of this embodiment adds a feed tank 302 and/or a concentrated feed tank 304 to the device of the first embodiment. The feed tank 302 has a feed liquid inlet F _in and a feed liquid outlet F _out , wherein the feed liquid outlet F _out is connected to the first inlet In1 for inputting the feed liquid. The feed liquid inlet F _in is connected to the first outlet Out1, in order to feed the feed liquid from the first chamber 106 to the feed tank 302, and flow back to the first chamber 106 from the feed liquid outlet F _out to circulate Concentrate the feed liquid until the concentrated components therein reach a first predetermined concentration, the thick feed tank 304 has a rich feed tank inlet P _in and a rich feed tank outlet P _out , wherein the rich feed tank outlet P _out and the third The inlet In3 is connected, and the concentrated feed tank inlet P _in is used to receive the concentrated feed liquid, and flow back to the third chamber 110 from the concentrated feed tank outlet P _out to circulate the concentrated feed liquid until the concentrated components therein A second predetermined concentration is reached. And the pipeline between the outlet P _out of the concentrated feed tank and the third inlet In3 is also provided with a discharge pipe 306, which is connected to the outlet P _{out of} the concentrated feed tank to discharge the concentrated feed liquid, for example, to reach the second predetermined When the concentration is high, the feed liquid is discharged.

The concentration method in one embodiment of the present invention uses a forward osmosis concentration device 300 as shown in FIG. 3 , including the first stage of concentration and the second stage of concentration. Therefore, the present invention belongs to staged concentration. The first stage of concentration is to circulate the feed liquid into the first chamber 106, and utilize the osmotic pressure difference between the feed liquid in the first chamber 106 and the extraction liquid in the second chamber 108 to make the Moisture passes through the first forward osmosis membrane FO1 to the second chamber 108 until the concentration of the concentrated component in the feed liquid reaches a first predetermined concentration. Then, the first switch element SW1 (such as a valve) is turned on, so that the feed liquid that has been concentrated in the first stage enters the third chamber 110, and then concentrates in the second stage. The second stage of concentration is to make the feed The liquid circulates into the third chamber 110, and utilizes the osmotic pressure difference between the feed liquid in the third chamber 110 and the extraction liquid in the fourth chamber 112 to make the moisture in the feed liquid pass through the second forward osmosis membrane FO2 to the fourth chamber 112 until the concentration of the concentrated components in the feed liquid reaches a second predetermined concentration, wherein the second predetermined concentration is greater than the first predetermined concentration, and the concentration of the extract in the fourth chamber is greater than that of the second chamber The concentration of the extract solution in the chamber. When the concentration of the concentrated component in the feed liquid output from the third outlet Out3 reaches the second predetermined concentration (such as the target concentration), the second switch element SW2 can be turned on to discharge the feed liquid from the discharge pipe 306 .

Fig. 4 is a schematic diagram of a forward osmosis concentration device according to the fourth embodiment of the present invention, wherein the symbol and technical terms of the third embodiment are used to represent the same components, and the description of the same components can refer to the above-mentioned third embodiment The relevant content of the example will not be repeated here.

Referring to FIG. 4 , the forward osmosis concentration device 400 of this embodiment further includes a plurality of monitoring elements T and a processor 402 . The monitoring element T is used to immediately monitor the flow rate and pressure of the feed liquid output from the first chamber 106 and the third chamber 110, and the weight and conductivity of the feed liquid entering the first chamber 106 and the third chamber 110. , the concentration of the concentrated components in the feed liquid entering and leaving the first chamber 106 and the third chamber 110, and the flow rate, pressure, conductivity and Concentrated component concentration. The position of above-mentioned multiple monitoring elements T in Fig. 4 represents the corresponding position of the object of monitoring, for example, the monitoring element T in the feed tank 302 is used to measure the weight and conductivity of the feed liquid entering the first chamber 106; So on and so forth. The processor 402 can calculate multiple indicators of concentration efficiency through real-time monitoring data, and monitor The testing element T is, for example, a monitor of the transmitter type, so that information can be transmitted to the processor 402 in a wireless manner. The multiple indicators include the selectivity of the concentrated components in the feed solution, the concentration of the concentrated components, the concentration of the extract solution, the water flux of the feed solution, and the osmotic pressure difference between the feed solution and the extract solution.

The selectivity of the concentrated component can be obtained by using Equation 1: R=C _f ×v _f /(C _f ×v _f +C _d ×v _d ) Equation 1 where R is the rejection rate and C _f is the feed The concentration of the concentrated component in the liquid, v _f is the volume of the feed liquid, C _d is the concentration of the concentrated component in the extract, and v _d is the volume of the extract.

The water flux of the feed liquid is obtained by using Equation 2: J _W =△v _f /(a△t) Equation 2 where J _W is the water flux, △v _f is the volume change of the feed liquid, and a is the first The area of the forward osmosis membrane FO1 or the area of the second forward osmosis membrane FO2, Δt is the length of time.

The osmotic pressure can use the Van't Hoff equation (van't Hoff equation): π=iCRT, where π represents the osmotic pressure, I represents the van't Hoff coefficient, C represents the molar concentration (molar concentration), and R represents the ideal gas constant , T represents the temperature.

The monitoring method of concentration depends on the type of feed liquid. If the feed liquid is waste liquid or other solutions containing water-soluble organic solvents, near-infrared spectroscopy can be used, which has specificity for different compounds, and the instrument can be miniaturized and monitored online. However, the present invention is not limited thereto, and other monitoring methods such as mid-infrared spectroscopy, gas phase or liquid chromatography mass spectrometry can be applied to this type of feed liquid.

On the other hand, if the feed liquid is liquid containing water or organic matter dissolved in water Quality can be monitored by near-infrared spectroscopy, or with other monitoring equipment such as mid-infrared spectroscopy, liquid chromatography mass spectrometer, matrix-assisted laser desorption mass spectrometer, etc.

If the feed liquid is an aqueous solution containing inorganic compounds, inorganic metals, or inorganic salts, monitoring methods such as conductivity, pH meter, ion meter, ion chromatography, and inductively coupled plasma atomic emission spectroscopy can be used.

Fig. 5 is a schematic diagram of a forward osmosis concentration device according to a fifth embodiment of the present invention.

Referring to FIG. 5 , the forward osmosis concentration device 500 of this embodiment includes a first forward osmosis module FOM1 and a second forward osmosis module FOM2 . The first forward osmosis module FOM1 includes a feed tank 502 , a first cavity 504 and a first feed liquid transmission line 510 . The feed tank 502 has a feed liquid inlet F _in and a feed liquid outlet F _out . The first chamber 504 has the same first forward osmosis membrane FO1 as the previous embodiment to separate the first chamber 504 into a first chamber 506 and a second chamber 508, wherein the first chamber 506 has a first inlet In1 and a second chamber 508. An outlet Out1, the second chamber 508 has a second inlet In2 and a second outlet Out2. The first inlet In1 is connected to the feed liquid outlet F _out to receive the feed liquid from the feed tank 502, and can be pressurized by a pump 503 or adjusted by a branch line 505 with a switch to enter the first chamber 506. The amount of feed liquid. The first feed liquid transmission line 510 is connected to the first outlet Out1, wherein the first feed liquid transmission line 510 includes a first branch line BP1 and a second branch line BP2 in parallel and a first branch line BP1 arranged on the first branch line BP1. Switching element SW1. The second branch pipeline BP2 is connected to the feed tank 502, so that the feed liquid concentrated in the first chamber 506 is returned to the feed tank 502, and the concentrated component of the first switch element SW1 in the concentrated feed liquid After reaching a first predetermined concentration, it is turned on so that it enters the second forward osmosis module FOM2.

The second forward osmosis module FOM2 includes a concentrated feed tank 512 , a second cavity 514 and a second feed liquid transmission line 520 . The rich feed tank 512 has a rich feed tank inlet P _in and a rich feed tank outlet P _out . The second chamber 514 has the same second forward osmosis membrane FO2 as the previous embodiment, and the second chamber 514 is divided into a third chamber 516 and a fourth chamber 518. The third chamber 516 has a third inlet In3 and a third chamber. Outlet Out3, the fourth chamber 518 has a fourth inlet In4 and a fourth outlet Out4, wherein the third inlet In3 is connected to the first branch pipeline BP1 to receive the feed liquid whose concentrated components reach the first predetermined concentration, and the second The three outlets Out3 are connected with the inlet P _in of the concentrated feed tank to transport the feed liquid. The second feed liquid transfer line 520 is connected to the concentrated feed tank outlet P _out , wherein the second feed liquid transfer line 520 includes the third branch line BP3 and the fourth branch line BP4 in parallel and is arranged on the third branch line BP3 The second switching element SW2. The fourth branch pipeline BP4 is connected to the third inlet In3 through the first branch pipeline BP1, so that the feed liquid in the concentrated feed tank can be returned to the third chamber 516, and can be pressurized by the pump 513 or with a switch (such as Valve) branch line 515 regulates the amount of feed liquid entering the third chamber 516. The second switch element SW2 is turned on after the concentrated component in the concentrated feed liquid reaches a second predetermined concentration, so as to discharge the concentrated feed liquid.

Please continue to refer to FIG. 5 , the fourth inlet In4 of the fourth chamber 518 is used to receive the extraction liquid, and the fourth outlet Out4 is connected to the second inlet In2 to transport the extraction liquid from the fourth chamber 518 to the second chamber Chamber 508, the second outlet Out2 is used to discharge the diluted extraction solution. As for the type of the feed liquid, the type of the first forward osmosis membrane FO1 , the type of the second forward osmosis membrane FO2 , etc., all can refer to the relevant descriptions of the above-mentioned embodiments.

Fig. 6 is a schematic diagram of a forward osmosis concentration device according to the sixth embodiment of the present invention, wherein the symbol and technical terms of the fifth embodiment are used to represent the same components, and the description of the same components can refer to the above-mentioned fifth embodiment The relevant content of the example will not be repeated here.

Please refer to Fig. 6, the forward osmosis concentration device 600 of the present embodiment adds at least one third forward osmosis module FOM3 in addition in the device of the fifth embodiment, is arranged on the first forward osmosis module FOM1 and the second forward osmosis module between groups FOM2. The third forward osmosis module FOM3 includes a third chamber 604 , and the third chamber 604 has a third forward osmosis membrane FO3 that separates the third chamber 604 into a fifth chamber 606 and a sixth chamber 608 . The inlet of the fifth chamber 606 is connected to the first switching element SW1 of the first branch pipeline BP1, and the outlet of the fifth chamber 606 is connected to the first branch before the junction 610 of the fourth branch pipeline BP4 and the first branch pipeline BP1 Pipeline BP1. The sixth chamber 608 is located between the fourth outlet Out4 and the second inlet In2 for delivering the extraction liquid.

The third forward osmosis module FOM3 may further include a third switching element SW3 and a temporary storage tank 602 . The third switching element SW3 is disposed at the connection between the outlet of the fifth chamber 606 and the first branch pipeline BP1. The temporary storage tank 602 has a temporary storage tank inlet TS _in and a temporary storage tank outlet TS _out , wherein the temporary storage tank outlet TS _out is connected to the entrance of the fifth chamber 606, and the temporary storage tank inlet TS _in is connected to the outlet of the fifth chamber 606 connected to circulate the concentrated feed liquid in the fifth chamber 606, and can be pressurized by the pump 603 or the amount of the feed liquid entering the fifth chamber 606 can be adjusted by using the branch line 605 with a switch. The third switch element SW3 is turned on after the concentrated component in the concentrated feed liquid reaches a third predetermined concentration, so that the feed liquid flows into the second forward osmosis module FOM2. The third predetermined concentration is between the first predetermined concentration and the second predetermined concentration. Moreover, although Fig. 6 only shows one third forward osmosis module FOM3, the number of the third forward osmosis module FOM3 can be multiple, depending on how many stages the concentration process should be divided into.

Fig. 7 is a schematic diagram of a forward osmosis concentration device according to the seventh embodiment of the present invention, wherein the symbol and technical terms of the fifth embodiment are used to represent the same components, and the description of the same components can refer to the above-mentioned fifth embodiment The relevant content of the example will not be repeated here.

Please refer to Fig. 7, the forward osmosis concentrating device 700 of the present embodiment is to increase the circulating design of extraction liquid in the device of the fifth embodiment, wherein the second forward osmosis module FOM2 in the forward osmosis concentrating device 700 can also include an extraction tank 702 and the first extraction liquid transmission pipeline 704. The extraction tank 702 has an extraction liquid inlet D _in and an extraction liquid outlet D _out . The first extraction liquid transmission line 704 is connected to the fourth outlet Out4, and the first extraction liquid transmission line 704 includes the fifth branch line BP5 and the sixth branch line BP6 connected in parallel and the fourth switch element SW4 arranged on the fifth branch line BP5 . The fifth branch pipeline BP5 is connected to the second inlet In2, and the sixth branch pipeline BP6 is connected to the extraction tank 702, so that the extracted liquid diluted in the fourth chamber 518 flows back to the extraction tank 702, and can be pressurized by the pump 703 or utilized A branch line 705 with a switch regulates the amount of extraction liquid entering the fourth chamber 518 . The fourth switching element SW4 is turned on when the diluted extraction solution drops to a fourth predetermined concentration, wherein the fourth predetermined concentration is expected to have a set osmotic pressure difference with the feed liquid in the first chamber 506 .

The first forward osmosis module FOM1 may further include a dilution tank 706 and a second extraction liquid transmission line 708 . The dilution tank 706 has a dilution tank inlet DD _in and a dilution tank outlet DD _out , and the dilution tank inlet DD _in is connected to the second outlet Out2. The second extraction liquid transmission line 708 is connected to the outlet DD _{out of} the dilution tank, and the second extraction liquid transmission line 708 includes the seventh branch line BP7 and the eighth branch line BP8 connected in parallel and the fifth switch element arranged on the seventh branch line BP7 SW5. The eighth branch line BP8 is connected to the second inlet In2 through the fifth branch line BP5, so that the extraction liquid in the dilution tank 706 can flow back to the second chamber 508, and can be pressurized by the pump 713 or by using the branch line 715 with a switch The amount of extraction liquid entering the second chamber 508 is adjusted. And the fifth switch element SW5 is turned on after the diluted extraction solution drops to a fifth predetermined concentration, so as to discharge the diluted extraction solution.

In order to optimize the judgment of conditions and achieve the improvement of system control and concentration effect, it is possible to install sensors at appropriate positions on the system to monitor the status of the system in real time, and to carry out dynamic data calculation judgment and adjustment by matching the processor . The sensors are, for example, weight sensors, conductivity meters, concentration sensors, and flow meters. Please continue to refer to Figure 7, the forward osmosis concentration device 700 of this embodiment may also include several weight sensors W1~W2, several conductivity meters C1~C4, several concentration sensors S1~S5, several pressure sensors Meters P1~P4 and several flowmeters F1~F4. The weight sensor W1 is used to monitor the weight of the feed liquid in the feed tank 502 in real time, and the weight sensor W2 is used to monitor the weight of the feed liquid in the concentrated feed tank 512 in real time. Conductivity meter C1 is used for real-time monitoring the conductivity of the feed liquid in feed tank 502, and conductivity meter C2 is used for real-time monitoring the conductivity of the feed liquid in thick feed tank 512, and conductivity meter C3 is used for instant monitoring. Monitoring the conductivity of the extraction solution in the dilution tank 706 can be used to convert the concentration of the extraction solution. Conductivity meter C4 is used for real-time monitoring the conductivity of the extraction liquid in the extraction tank 702, which can be used to convert The concentration of the solution. The concentration sensor S1 is used for real-time monitoring of the concentration of the concentrated component in the feed liquid from the feeding tank 502, and the concentration sensor S2 is used for real-time monitoring of the concentrated component in the feed liquid entering the third chamber 516 Concentration sensor S3 is used to monitor the concentration of the concentrated component in the feed liquid entering the thick feed tank 512 in real time, and the concentration sensor S4 is used to monitor the concentration of the concentrated component from the extraction tank 702 in real time, The concentration sensor S5 is used to monitor the concentration of the concentrated component from the dilution tank 706 in real time. The pressure gauge P1 and the flow meter F1 are respectively used for real-time monitoring of the pressure and flow rate of the feed liquid in the second branch pipeline BP2. The pressure gauge P2 and the flow meter F2 are used to monitor the pressure and flow rate of the feed liquid passing through the third chamber 516 in real time, respectively. The pressure meter P3 and the flow meter F3 are respectively used to monitor the pressure and flow rate of the extraction liquid passing through the second chamber 508 in real time. The pressure gauge P4 and the flow meter F4 are respectively used for real-time monitoring of the pressure and flow rate of the extract in the sixth branch pipeline BP6. The aforementioned sensor configurations are just examples, not limited thereto, and those skilled in the art can selectively use them according to requirements.

In addition, with reference to the content of the fourth embodiment, the processor can be used to calculate multiple indicators of the concentration efficiency through the real-time monitoring data. The multiple indicators include the concentration of the extract, the selectivity of the concentrated components, and the water flux of the feed solution. , and the osmotic pressure difference between the feed solution and the extract solution. For example, according to the above equation 1, if the weight sensors W1 and W2 are used to estimate the volume of the feed liquid before and after concentration, and the concentration sensors S1 and S3 are used to obtain the concentration of the feed liquid before and after concentration, and combined with Equation 1 According to the above equation 2, if the weight sensor W1~W2 is used to estimate the volume change of the feed liquid, and other parameters in equation 2 are used, the further parameters can be obtained. Water flux of feed liquid. As for the osmotic pressure of the feed liquid It can be estimated by the concentration sensors S1 and S2, and the osmotic pressure of the extract can be estimated by the conductivity meters C3 and C4.

Therefore, a concentration optimization step performed using the forward osmosis concentration device shown in FIG. 7 is shown in FIG. 8 .

First, in step 800, multiple indicators of concentration efficiency are calculated based on real-time monitoring data, such as the selectivity of the concentrated components in the feed liquid, the water flux of the feed liquid, and the osmotic pressure of the feed liquid and the extraction liquid Difference. The monitoring frequency can be 1 time/second, 1 time/minute, etc.

In step 802, it is confirmed whether the concentration of the concentrated component reaches the target concentration, wherein the concentration value is obtained by the concentration sensor S3. If the target concentration is reached, the concentration is ended (step 804). If the target concentration has not been reached, go to step 806 .

In step 806, it is confirmed whether the selectivity of the concentrated component in the feed liquid is greater than 50%, wherein the selectivity is obtained by weight sensors W1 and W2 and concentration sensors S1, S2, S4, and S5 Values and other parameters are estimated. If the selectivity is greater than 50%, go to step 808. If the selectivity is not greater than 50%, proceed to step 810 to increase the osmotic pressure or water flux of the extract.

In step 808, it is confirmed whether the water flux of the feed liquid is greater than 1 LMH, wherein the water flux of the feed liquid is estimated by weight sensors W1 and W2 and other parameters. If the water flux of the feed liquid is greater than 1LMH, proceed to step 812 and continue to concentrate. If the water flux of the feed liquid is not greater than 1LMH, proceed to step 814 .

In step 814, it is confirmed whether the osmotic pressure difference is greater than 0 bar, wherein the osmotic pressure difference can be obtained by using the concentration sensors S1 and S2 and the conductivity meters C3 and C4 The data is estimated. If the osmotic pressure difference is greater than 0 bar, proceed to step 816 to adjust the flow rate, pressure or temperature, wherein the flow rate and pressure can be adjusted respectively by using pumps 503, 513, 703, 713 or branch pipelines 505, 515, 705, 715 with switches, and the temperature It is usually room temperature, and in one embodiment, the membrane (such as the first forward osmosis membrane FO1, the second forward osmosis membrane) can be slowed down by increasing the flow rate and pressure of the feed liquid and/or reducing the flow rate and pressure of the extraction liquid. Membrane FO2) concentration polarization problem. On the other hand, if the osmotic pressure difference is not greater than 0 bar, proceed to step 818 to increase the concentration of the extract.

The following experiments are listed to verify the efficacy of the present invention, but the present invention is not limited to the following content.

<Experimental Example 1>

In order to verify the effect of staged forward osmosis concentration, the forward osmosis concentration device 700 in FIG. 7 is used to concentrate the isopropanol aqueous solution, and an experimental test is carried out with near-infrared detection. The actual implementation method is as follows.

First, carry out the first stage of concentration, use 2.40L of isopropanol aqueous solution with a concentration of 15.38% (the value obtained by the concentration sensor S1) as the feed liquid into the feed tank 502, and 4L of sodium chloride diluted in the second stage As an extract (Dilute Draw), it circulates at a flow rate of 0.18gpm (values obtained by flow meters F1 and F3) at room temperature at 25°C. The initial weight measured by the weight sensor W1 is 4.361kg, and the conductivity meter C1 The measured initial conductivity is 1092μS, the initial conductivity measured by the conductivity meter C3 is 252.5mS, the concentration reached after 15 minutes of circulation is 33.33%, the weight measured by the weight sensor W1 is 2.485kg, The conductivity measured by the conductivity meter C1 is 33.0mS, and the conductivity measured by the conductivity meter C3 is 200.9mS. Water flux at this stage Between 4.5 and 17.7LMH. Thus, a 15-minute cycle increases the isopropanol concentration from 15.38% to 33.33%, more than double the concentration.

After the first stage of concentration is completed, the second stage of concentration is carried out, and 1.44L of isopropanol aqueous solution with a concentration of 27.69% (the value obtained by the concentration sensor S2) is used as the feed liquid to feed the concentrated feed tank 512, and 4L of 6M chlorine Sodium chloride is used as a concentrated extract solution (Draw Solution), circulated at a flow rate of 0.18gpm at room temperature 25°C (values acquired by flow rate meters F2 and F4), and the initial weight measured by the weight sensor W2 is 3.227kg, which is conductive The initial conductivity measured by the meter C2 is 36.6μS, the initial conductivity measured by the conductivity meter C4 is 274.3mS, and the concentration reached after 9 minutes of circulation is 54.77%, the weight measured by the weight sensor W2 The conductivity measured by the conductivity meter C2 is 20.1mS, and the conductivity measured by the conductivity meter C4 is 251.8mS. The water flux at this stage is between 4.2 and 9.5 LMH. Thus, a 9-minute cycle increases the isopropanol concentration from 27.69% to 54.77%, almost doubling the concentration.

Fig. 9 is a graph of real-time monitoring of water flux and extract concentration per second for Experimental Example 1. It can be seen from Figure 9 that the conductivity of the extract gradually decreases with time, which means that the concentration of the extract becomes lower; and the water flux also decreases significantly with time. Therefore, water flux or extract concentration can be increased based on immediate monitoring results.

<Comparative example>

First, the first stage of concentration is carried out, and 3L of isopropanol aqueous solution with a concentration of 18.22% (the value obtained by the concentration sensor S1) is added to the feed tank 502 as the feed liquid, and 4L of 6M sodium chloride is used as the extract (Dilute Draw), circulating at a flow rate of 0.18gpm (values obtained by flow meters F1 and F3) at room temperature 25°C, measured by weight sensor W1 The initial weight is 4.679kg, the initial conductivity measured by conductivity meter C1 is 31.2μS, the initial conductivity measured by conductivity meter C3 is 262.8mS, and the concentration reached after 12 minutes of circulation is 30.56%. The weight measured by the sensor W1 is 2.969kg, the conductivity measured by the conductivity meter C1 is 20.4mS, and the conductivity measured by the conductivity meter C3 is 210.8mS. The water flux at this stage is between 7.8 and 16.7 LMH. Therefore, the circulating isopropanol concentration only increased from 18.22% to 30.56% after 12 minutes, less than double the concentration.

After the first stage of concentration is completed, the second stage of concentration is carried out, and 1.355L of isopropanol aqueous solution with a concentration of 30.56% (the value obtained by the concentration sensor S2) is used as the feed liquid and added to the concentrated feed tank 512, and the 4L first The diluted sodium chloride is used as the draw solution (Draw Solution), circulated at a flow rate of 0.18gpm at room temperature 25°C (values obtained by flow rate meters F2 and F4), and the initial weight measured by the weight sensor W2 is 3.034kg, the initial conductivity measured by the conductivity meter C2 is 20.4mS, the initial conductivity measured by the conductivity meter C4 is 210.8mS, and the concentration reached after 8 minutes of circulation is 34.67%, the weight sensor W2 The measured weight is 2.542kg, and the conductivity measured by conductivity meter C4 is 199.5mS. The water flux at this stage is between 3.3 and 8.4 LMH. Therefore, the concentration of isopropanol only increased from 30.56% to 34.67% after 8 minutes of circulating isopropanol, and could not achieve double the concentration.

<Experimental Example 2>

The feed liquid was changed from the isopropanol aqueous solution in Experimental Example 1 to the dimethylsulfone aqueous solution, and the experimental test was carried out with near-infrared detection. The actual implementation method is as follows.

First, carry out the first stage of concentration, with a concentration of 18.34% in 2.63L (according to the sense of concentration) The value obtained by the detector S1) of dimethyl sulfide aqueous solution is used as the feed liquid and added to the feed tank 502, and 4L of sodium chloride diluted in the second stage is used as the extract (Dilute Draw). The flow rate is 0.18gpm (the values obtained by flow meters F1 and F3) cycle, the initial weight measured by weight sensor W1 is 4.359kg, the initial conductivity measured by conductivity meter C1 is 1138μS, and The obtained initial conductivity was 247.2mS, and after 12 minutes of cycling, the concentration reached was 31.36%. The weight measured by the weight sensor W1 was 2.969kg, and the conductivity measured by the conductivity meter C3 was 200.5mS. The water flux at this stage is between 3.8 and 15.9 LMH. Therefore, after a 12-minute cycle, the concentration of dimethylsulfoxide can be increased from 18.34% to 31.36%, which is nearly twice the concentration.

After the first stage of concentration is completed, the second stage of concentration is carried out, and 1.33L of dimethylsulfoxide aqueous solution with a concentration of 32.54% (value obtained by the concentration sensor S2) is used as the feed liquid and fed into the concentrated feed tank 512, 4L 6M sodium chloride is used as the draw solution (Draw Solution), circulated at a flow rate of 0.18gpm at room temperature 25°C (values obtained by flow rate meters F2 and F4), the initial weight measured by the weight sensor W2 is 3.403kg, The initial conductivity measured by the conductivity meter C2 is 12.5μS, the initial conductivity measured by the conductivity meter C4 is 252.8mS, and the concentration reached after 12 minutes of circulation is 51.48%, measured by the weight sensor W2 The weight is 2.544kg, and the conductivity measured by conductivity meter C4 is 246.1mS. The water flux at this stage is between 2.7 and 10.4 LMH. Therefore, after 8 minutes of circulation, the concentration of dimethylsulfoxide increased from 32.54% to 51.48%, and the concentration increased by about 1.6 times.

In summary, the device of the present invention is basically a segmented forward osmosis system Design continuous or batch concentration devices to achieve high-efficiency concentration. At the same time, the device of the present invention can also be equipped with real-time monitoring technology at each stage to further improve the concentration efficiency. Since the flow direction of the feed liquid containing the concentrated components is opposite to that of the extract liquid, the osmotic pressure difference between the feed liquid and the extract liquid during two or more stages of concentration can be effectively maintained. Moreover, each stage can be equipped with real-time monitoring components for real-time online continuous monitoring. Calculate the concentration efficiency index through the monitoring results, and make condition optimization judgments to achieve the results of system control and concentration effect improvement.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.

100: Forward osmosis concentration device

102: The first cavity

104: Second cavity

106: The first chamber

108: second chamber

110: third chamber

112: The fourth chamber

FO1: the first forward osmosis membrane

FO2: the second forward osmosis membrane

In1: the first entrance

In2: Second entrance

In3: the third entrance

In4: the fourth entrance

Out1: the first exit

Out2: the second exit

Out3: the third exit

Out4: the fourth exit

Claims (22)

A forward osmosis concentration device, comprising: a first cavity, with a first forward osmosis membrane separating the first cavity into a first chamber and a second chamber, wherein the first chamber has a first inlet and a second chamber. The first outlet, the second chamber has a second inlet and a second outlet; the second chamber has a second forward osmosis membrane to separate the second chamber into a third chamber and a fourth chamber, wherein The third chamber has a third inlet and a third outlet, the fourth chamber has a fourth inlet and a fourth outlet; and a plurality of monitoring elements, wherein the first inlet is used to receive concentrated components Feed liquid, the first outlet is connected to the third inlet to transport the feed liquid from the first chamber to the third chamber, and the third outlet is used to discharge the concentrated The feed liquid after that, wherein the fourth inlet is used to receive the extraction liquid, and the fourth outlet is connected to the second inlet to transport the extraction liquid from the fourth chamber to the The second chamber, the second outlet is used to discharge the diluted extraction solution, wherein the several monitoring elements are respectively used to monitor the output of the first chamber and the third chamber in real time. The flow rate and pressure of the feed liquid, the weight and conductivity of the feed liquid entering the first chamber and the third chamber, all the feed liquid entering and exiting the first chamber and the third chamber Concentration of the concentrated component in the feed liquid and real-time monitoring of the flow rate, pressure, conductivity and concentration of the concentrated component of the extraction solution entering and leaving the fourth chamber and the second chamber . The forward osmosis concentration device according to claim 1, further comprising at least one third chamber disposed between the first chamber and the second chamber, the third chamber having a third forward osmosis a membrane separates the third chamber into a fifth chamber and a sixth chamber, wherein the fifth chamber is between the first outlet and the third inlet for concentrating the feed liquid, and the sixth chamber is between the fourth outlet and the second inlet for delivering the extraction liquid. The forward osmosis concentration device according to claim 1, further comprising a feed tank having a feed liquid inlet and a feed liquid outlet, wherein the feed liquid outlet is connected to the first inlet for inputting the feed liquid Liquid. The forward osmosis concentration device according to claim 3, wherein the feed liquid inlet is connected to the first outlet to transport the feed liquid from the first chamber to the feed tank, And flow back from the feed liquid outlet to the first chamber, so as to circulate and concentrate the feed liquid until the concentrated components therein reach a first predetermined concentration. The forward osmosis concentration device according to claim 1, further comprising a concentrated feed tank having an inlet of a concentrated feed tank and an outlet of a concentrated feed tank, wherein the outlet of the concentrated feed tank is connected to the third inlet, the The inlet of the concentrated feed tank is used to receive the concentrated feed liquid, and flow back from the outlet of the concentrated feed tank to the third chamber to circulate and concentrate the feed liquid until the concentrated feed liquid is concentrated. The ingredient reaches a second predetermined concentration. The forward osmosis concentration device according to claim 5 further includes a discharge pipe connected to the outlet of the concentrated feed tank for discharging the concentrated feed liquid. The forward osmosis concentration device as described in Claim 1 further includes a processor, which calculates multiple indicators of concentration efficiency through real-time monitoring data, and the multiple indicators include the selection of the concentrated components in the feed liquid properties, the concentration of the concentrated component, the concentration of the extract, the water flux of the feed liquid, the osmotic pressure difference of the feed liquid, and the osmotic pressure difference of the extract liquid. A forward osmosis concentration device, comprising: a first forward osmosis module, comprising: a feed tank having a feed liquid inlet and a feed liquid outlet; a first chamber having a first forward osmosis membrane connecting the first chamber Divided into a first chamber and a second chamber, the first chamber has a first inlet and a first outlet, the second chamber has a second inlet and a second outlet, wherein the first inlet and the The feed liquid outlet is connected to receive the feed liquid from the feed tank; and the first feed liquid transfer line is connected to the first outlet, and the first feed liquid transfer line includes a parallel The first branch line, the second branch line and the first switch element arranged on the first branch line, wherein the second branch line is connected to the feed tank, so that after the first chamber is concentrated The feed liquid is returned to the feed tank, and the first switch element is turned on after the concentrated components in the concentrated feed liquid reach a first predetermined concentration; and the second forward osmosis mode The set includes: a concentrated feed tank with an inlet of a concentrated feed tank and an outlet of a concentrated feed tank; a second chamber with a second forward osmosis membrane separating the second chamber into a third chamber and a fourth chamber chamber, the third chamber has a third inlet and a third outlet, The fourth chamber has a fourth inlet and a fourth outlet, wherein the third inlet is connected to the first branch line for receiving the feed that the concentrated component reaches the first predetermined concentration liquid, and the third outlet is connected to the inlet of the concentrated feed tank for conveying the feed liquid; and the second feed liquid transmission line is connected to the outlet of the concentrated feed tank, and the second The feed liquid transmission pipeline includes a third branch pipeline and a fourth branch pipeline connected in parallel, and a second switch element arranged on the third branch pipeline, wherein the fourth branch pipeline connects the The third inlet is used to return the feed liquid in the concentrated feed tank to the third chamber, and the concentrated feed liquid in the second switch element is concentrated After the component reaches a second predetermined concentration, it is opened to discharge the concentrated feed liquid, wherein the fourth inlet is used to receive the extraction liquid, and the fourth outlet is connected to the second inlet to The extraction solution is transported from the fourth chamber to the second chamber, and the second outlet is used to discharge the diluted extraction solution. The forward osmosis concentration device according to claim 8, further comprising at least one third forward osmosis module, arranged between the first forward osmosis module and the second forward osmosis module, the third forward osmosis module The osmosis module includes a third chamber, the third chamber has a third forward osmosis membrane to separate the third chamber into a fifth chamber and a sixth chamber, wherein the inlet of the fifth chamber is connected to to said first switching element of said first branch line, the outlet of said fifth chamber connected to said first branch line before the junction of said fourth branch line and said first branch line, Wherein the sixth chamber is located between the fourth outlet and the second inlet for delivering the extraction solution. The forward osmosis concentration device according to claim 9, wherein the third forward osmosis module further includes: a third switch element, arranged at the connection between the outlet of the fifth chamber and the first branch pipeline; and The temporary storage tank has a temporary storage tank inlet and a temporary storage tank outlet, wherein the temporary storage tank outlet is connected to the entrance of the fifth chamber, and the temporary storage tank inlet is connected to all the fifth chambers. The outlet is connected to circulate and concentrate the feed liquid in the fifth chamber, and the third switching element is configured after the concentrated component in the concentrated feed liquid reaches a third predetermined concentration. open. The forward osmosis concentration device according to claim 10, wherein the third predetermined concentration is between the first predetermined concentration and the second predetermined concentration. The forward osmosis concentration device as described in claim item 8 further includes: several weight sensors, which are respectively used to monitor the weights of the feed liquid in the feed tank and the concentrated feed tank in real time; A degree meter is used to monitor the conductivity of the feed liquid in the feed tank and the concentrated feed tank in real time respectively; several concentration sensors are used to monitor the conductivity of the feed liquid from the feed tank in real time respectively. The concentration of the concentrated component in the feed liquid, the concentration of the concentrated component in the feed liquid entering the third chamber, and the concentration of the concentrated component in the feed liquid entering the concentrated feed tank the concentration of said concentrated ingredient of Several pressure gauges are respectively used to monitor the pressure of the feed liquid in the second branch pipeline and the pressure of the feed liquid passing through the third chamber in real time; and several flowmeters are respectively used for to monitor in real time the flow rate of the feed liquid in the second branch line and the flow rate of the feed liquid passing through the third chamber. The forward osmosis concentration device as described in claim 12 further includes a processor, which calculates multiple indicators of concentration efficiency through real-time monitoring data, and the multiple indicators include the concentration of the concentrated components in the feed liquid , the water flux of the feed liquid, and the osmotic pressure of the feed liquid. The forward osmosis concentration device according to claim 8, wherein the second forward osmosis module further includes: an extraction tank having an extraction liquid inlet and an extraction liquid outlet; and a first extraction liquid transmission line connected to the fourth outlet, the first extraction liquid transmission pipeline includes a fifth branch pipeline and a sixth branch pipeline connected in parallel and a fourth switch element arranged on the fifth branch pipeline, wherein the fifth branch pipeline is connected to the second Inlet, the sixth branch pipeline is connected to the extraction tank, so that the extraction solution diluted in the fourth chamber flows back to the extraction tank, and the fourth switching element is in the diluted It is turned on after the extraction liquid drops to a fourth predetermined concentration. The forward osmosis concentration device according to claim 14, wherein the first forward osmosis module further includes: a dilution tank having a dilution tank inlet and a dilution tank outlet, the dilution tank inlet being connected to the second outlet; and The second extraction liquid transmission line is connected to the outlet of the dilution tank, and the second extraction The liquid transmission pipeline includes a seventh branch pipeline and an eighth branch pipeline connected in parallel, and a fifth switch element arranged on the seventh branch pipeline, wherein the eighth branch pipeline is connected to the second branch pipeline through the fifth branch pipeline. inlet, so that the extraction solution in the dilution tank flows back to the second chamber, and the fifth switch element is turned on after the diluted extraction solution drops to a fifth predetermined concentration, for The diluted extract is discharged. The forward osmosis concentration device as described in claim item 15 further includes: several conductivity meters, respectively used to monitor the conductivity of the extraction solution in the extraction tank and the dilution tank in real time; several concentration sensors, respectively used for real-time monitoring of the concentration of the concentrated component from the extraction tank and the concentration of the concentrated component from the dilution tank; several pressure gauges are respectively used for real-time monitoring of The pressure of the extraction liquid and the pressure of the extraction liquid passing through the second chamber; The flow rate of the extraction solution in the second chamber. The forward osmosis concentration device as described in claim 16 further includes a processor, which calculates multiple indicators of concentration efficiency through real-time monitoring data, and the multiple indicators include the concentration of the extraction solution, the water content of the feed solution The flux, the osmotic pressure difference between the feed solution and the extract solution, and the selectivity of the concentrated components. A concentration method using the forward osmosis concentration device described in any one of claim items 8 to 17, comprising: performing the first stage of concentration, circulating the feed liquid into the first chamber, and using the osmotic pressure difference of the extraction liquid in the second chamber to allow the moisture in the feed liquid to pass through the first forward osmosis membrane to the second chamber until the concentration of the concentrated component in the feed liquid reaches the first predetermined concentration; The feed liquid concentrated in the first stage enters the third chamber; and the second stage of concentration is carried out to circulate the feed liquid into the third chamber and utilize the The osmotic pressure difference of the extraction liquid causes the water to pass through the second forward osmosis membrane to the fourth chamber until the concentration of the concentrated component in the feed liquid reaches the second predetermined concentration, wherein The second predetermined concentration is greater than the first predetermined concentration, and the concentration of the extraction liquid in the fourth chamber is greater than the concentration of the extraction liquid in the second chamber. The concentration method according to claim 18, wherein the concentrated components include: water-soluble organic solvents, organic substances or inorganic solutions. The method for concentrating as claimed in item 19, wherein the water-soluble organic solvent comprises methanol, ethanol, 1-propanol, isopropanol, tertiary butanol, ethylene glycol, propylene glycol, 1,3-propanediol, 1, 2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, triethylene glycol, acetaldehyde, acetone, formic acid, acetic acid, propionic acid, butyric acid, acetonitrile , diethanolamine, 2,2'-diaminediethylamine, dimethylformamide, N-methyldiethanolamine, ethylene glycol monobutyl ether, ethylene glycol dimethyl ether, 1,4-dioxane , pyridine, N-methylpyrrolidone, dimethylsulfone or tetrahydrofuran. The method for concentrating according to claim 19, wherein the organic substance comprises a liquid aqueous or water-soluble organic substance. The concentration method according to claim 19, wherein the inorganic solution includes an aqueous solution containing inorganic compounds, inorganic metals or inorganic salts.

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