CN216367413U - Forward osmosis device for fluid concentration - Google Patents
Forward osmosis device for fluid concentration Download PDFInfo
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- CN216367413U CN216367413U CN202122723238.5U CN202122723238U CN216367413U CN 216367413 U CN216367413 U CN 216367413U CN 202122723238 U CN202122723238 U CN 202122723238U CN 216367413 U CN216367413 U CN 216367413U
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Abstract
The utility model provides a forward osmosis device for fluid concentration, which comprises a raw material tank, a first liquid drawing tank, a second liquid drawing tank, a product storage tank, a forward osmosis membrane component, a target solution pump, a liquid drawing pump and a conductivity meter, wherein the raw material tank is connected with the first liquid drawing tank; the forward osmosis membrane assembly is respectively connected with the raw material tank, the first liquid drawing tank, the second liquid drawing tank, the target solution pump, the liquid drawing pump and the conductivity meter; the conductivity meter is also connected with the product storage tank; the method comprises the following steps that a target solution in a raw material tank enters a forward osmosis membrane assembly through a target solution pump, a draw solution in a first draw solution tank or a second draw solution tank enters the forward osmosis membrane assembly through a draw solution pump, a concentrated solution of the target solution in the forward osmosis membrane assembly is subjected to concentration detection through a conductivity meter, and when the conductivity meter detects that the concentration of the concentrated solution reaches a standard, the concentrated solution is conveyed to a product storage tank; and when the conductivity meter detects that the concentration of the concentrated solution does not reach the standard, returning the concentrated solution to the raw material tank.
Description
Technical Field
The utility model relates to the technical field of fluid concentration, in particular to a forward osmosis device for fluid concentration.
Background
With the improvement of living standard, domestic consumers have higher and higher requirements on taste and quality of dairy products, so that the proper concentration of milk is necessary for producing the dairy products such as high-quality milk or yoghourt and the like and ensuring the consistency of product quality indexes. The common dairy processing and concentrating modes mainly comprise multi-effect evaporation, reverse osmosis concentration and single-effect evaporation.
For example, patent publication No. CN211963758U discloses a roll type reverse osmosis milk concentration device with high viscosity resistance, which comprises a raw liquid tank with a jacket, a low-pressure pump, a high-pressure pump and a roll type reverse osmosis membrane module in a complete filling structure. An electric heating wire is arranged on the outer layer of the bottom of the stock solution tank; a pipeline I and a stirrer are respectively arranged in the stock solution tank, and a temperature sensor is arranged below the stirrer and close to the bottom of the stirrer; one end of the pipeline I is communicated with a concentrated solution outlet pipeline of the roll type reverse osmosis membrane module; a permeate flow meter is arranged on a permeate outlet pipeline of the roll type reverse osmosis membrane component; and a pipeline II is arranged at the bottom of the stock solution tank, is sequentially connected with the low-pressure pump and the high-pressure pump and is connected with a membrane component stock solution inlet of the roll type reverse osmosis membrane component. Although the above patent can concentrate milk, the following technical problems still exist:
1. the reverse osmosis needs a high-pressure pump, so that the energy consumption is high;
2. the reverse osmosis membrane needs to be backwashed regularly to reduce the concentration capability.
In view of the above technical problems, it is desirable to improve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a forward osmosis device for fluid concentration.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a forward osmosis device for fluid concentration comprises a raw material tank, a first liquid drawing tank, a second liquid drawing tank, a product storage tank, a forward osmosis membrane component, a target solution pump, a liquid drawing pump and a conductivity meter;
the forward osmosis membrane assembly is respectively connected with the raw material tank, the first liquid drawing tank, the second liquid drawing tank, the target solution pump, the liquid drawing pump and the conductivity meter; the conductivity meter is also connected with the product storage tank;
the method comprises the following steps that a target solution in a raw material tank enters a forward osmosis membrane assembly through a target solution pump, a draw solution in a first draw solution tank or a second draw solution tank enters the forward osmosis membrane assembly through a draw solution pump, a concentrated solution of the target solution in the forward osmosis membrane assembly is subjected to concentration detection through a conductivity meter, and when the conductivity meter detects that the concentration of the concentrated solution reaches a standard, the concentrated solution is conveyed to a product storage tank; and when the conductivity meter detects that the concentration of the concentrated solution does not reach the standard, returning the concentrated solution to the raw material tank.
And furthermore, the device also comprises a reverse osmosis system, wherein one end of the reverse osmosis system is connected with the forward osmosis component, and the other end of the reverse osmosis system is connected with the first liquid-drawing tank and the second liquid-drawing tank.
Further, still include temperature sensor, temperature sensor's one end is connected with the one end of conductance meter, and temperature sensor's the other end is connected with product storage jar.
The reverse osmosis membrane device further comprises a first pressure sensor meter and a second pressure sensor, wherein one end of the first pressure sensor is connected with the forward osmosis component, and the other end of the first pressure sensor is connected with the reverse osmosis system; one end of the second pressure sensor is connected with the temperature sensor, and the other end of the second pressure sensor is connected with the product storage tank.
Furthermore, the device also comprises a turbidimeter, wherein one end of the turbidimeter is connected with the first pressure sensor, and the other end of the turbidimeter is connected with the reverse osmosis system.
The system further comprises a first flow meter and a second flow meter, wherein one end of the first flow meter is connected with the target solution pump, and the other end of the first flow meter is connected with the forward osmosis component; one end of the second flowmeter is connected with the forward osmosis component, and the other end of the second flowmeter is connected with the liquid drawing pump.
Compared with the prior art, the utility model has the following beneficial effects:
1. the forward osmosis membrane concentration scale realizes multiple times of concentration of a target solution by controlling the osmotic pressure difference of solutions on two sides of the forward osmosis membrane;
2. no heat source or strong external pressure is introduced, so that the concentration of the target solution is realized;
3. the content and the proportion of the main nutrients of the target solution are maintained. Compared with reverse osmosis membrane concentration and freeze concentration, the forward osmosis membrane concentration technology can greatly improve the concentration multiple of the dairy product, simultaneously reduce unit energy consumption and save operation cost;
4. the membrane pollution, the membrane loss and the loss of effective components caused by high-pressure operation of reverse osmosis are avoided.
Drawings
FIG. 1 is a schematic structural view of a forward osmosis apparatus for concentrating a fluid according to an embodiment of the present invention;
wherein: 1. a raw material tank 1; 2. a first draw solution tank; 3. a second draw solution tank; 4. a product storage tank; 5. a forward osmosis membrane module; 6. a target solution pump; 7. a liquid drawing pump; 8. a reverse osmosis system; 9. a conductivity meter; 10. a temperature sensor; 11. a first pressure sensor; 12. a second pressure sensor; 13. a turbidimeter; 14. a first flow meter; 15. a second flow meter.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
Example one
As shown in fig. 1, the present embodiment provides a forward osmosis apparatus for fluid concentration, which includes a raw material tank 1, a first draw-liquid tank 2, a second draw-liquid tank 3, a product storage tank 4, a forward osmosis membrane module 5, a target solution pump 6, a draw-liquid pump 7, a reverse osmosis system 8, a conductivity meter 9, a temperature sensor 10, a first pressure sensor 11, a second pressure sensor 12, a turbidity meter 13, a first flow meter 14, and a second flow meter 15.
The raw material tank 1 is connected with a forward osmosis membrane component 5 sequentially through a target solution pump 6 and a first flowmeter 14; the forward osmosis membrane component 5 is connected with the product storage tank 4 sequentially through a conductivity meter 9, a temperature sensor 10 and a second pressure sensor 12; the forward osmosis membrane assembly 5 is also respectively connected with the first liquid-drawing tank 2 and the second liquid-drawing tank 3 through a second flow meter 15 and a liquid-drawing pump 7 in sequence; the forward osmosis membrane module 5 is also connected to the reverse osmosis system 8 via a first pressure sensor 11 and a turbidimeter 13 in sequence.
In this embodiment, valves are respectively arranged in front of the first draw liquid tank 2 and the second draw liquid tank 3; a valve is also arranged behind the raw material tank 1.
In this embodiment, a method for using a forward osmosis apparatus for fluid concentration includes:
1. placing a target solution into a raw material tank 1, and respectively placing drawing solutions into a first drawing solution tank 2 and a second drawing solution tank 3;
two independent cycles are constructed with the target solution and draw solution on both sides of the forward osmosis membrane module.
2. Starting a target solution pump 6, and starting a liquid drawing pump 7 immediately after the target solution pump 6 is started;
in order to ensure that a system (a target solution pump) on one side of a target solution is started first and then a liquid-drawing pump is started, so that the first liquid-drawing tank 2 or the second liquid-drawing tank 3 can be started circularly (namely the first liquid-drawing tank 2 and the second liquid-drawing tank 3 can ensure continuous production and can be switched for use);
3. inputting a target solution into the forward osmosis membrane module 5 through a target solution pump 6, and enabling a draw solution in the first draw solution tank 2 or the second draw solution tank 3 to enter the forward osmosis membrane module 5 through a draw solution pump 7; the flow rate of the target solution pump 6 is controlled by the first flow meter 14, and the flow rate of the drawing liquid pump 7 is controlled by the second flow meter 15 so that the pressure on the target solution side (target solution pump 6) is slightly higher than the pressure on the drawing liquid circulation side (drawing liquid pump 7) during the entire operation.
This embodiment can prevent reverse osmosis of the target solution by controlling the pressure of the pump.
4. Extracting water in the target solution in the forward osmosis membrane module 5 into a draw solution, wherein the target solution in the forward osmosis membrane module 5 is continuously concentrated, and the draw solution in the forward osmosis membrane module 5 is continuously diluted;
the flux of water in the forward osmosis membrane module of the embodiment is mainly determined by osmotic pressure difference at two ends of the membrane, and the flux control of water is realized by adjusting the concentration of the draw solution.
5. The conductivity meter 9 detects the concentration of the concentrated target solution (namely, concentrated solution) in the forward osmosis membrane module 5, and when the conductivity meter detects that the concentration of the concentrated solution reaches the concentration multiple number standard, the concentrated solution is conveyed to the product storage tank; and when the conductivity meter detects that the concentration of the concentrated solution does not reach the concentration multiple standard, returning the concentrated solution to the raw material tank.
In this example, during operation, the target solution passes through multiple forward osmosis modules until the target concentration factor is reached.
Still through the temperature sensor 10 control concentrate product's temperature when carrying the concentrate, prevent that concentrate product high temperature from influencing product quality.
When the concentrated solution is conveyed, the second pressure sensor 12 is also used for detecting the fouling condition in the forward osmosis membrane and whether the pathway is blocked.
6. Outputting the diluted draw solution in the forward osmosis membrane component 5 to a reverse osmosis membrane system 8, recovering the draw solution by the reverse osmosis system 8, and intercepting the draw solution by the reverse osmosis system 8 to obtain the intercepted draw solution; wherein the obtained trapped drawing liquid is a drawing liquid salt solution which can be continuously used and then returns to the first drawing liquid tank 2 or the second drawing liquid tank 5; the remaining permeate in the reverse osmosis membrane system is water, which may be recycled to other uses in the plant.
The solution on the circulating side of the drawing liquid in the embodiment is continuously diluted due to the migration of water; and after the drawing liquid is diluted to a certain degree, the concentration of water is reduced by reverse osmosis and other methods, and the drawing capacity is reduced.
Before the diluted draw solution enters the reverse osmosis system, the first pressure sensor 11 detects the fouling condition in the forward osmosis membrane and whether the pathway is blocked.
The diluted draw solution is also monitored by a turbidity meter 13 before entering the reverse osmosis system; taking milk as an example: the protein content of the draw solution is monitored. The drawn liquid is initially in a clear state, and the protein gradually turns turbid after entering. The turbidimeter may detect a break in the membrane for the first time, thereby preventing the flow of raw milk into the draw solution side, or the flow of draw solution into the raw milk side.
In the embodiment, a pressure sensor, a turbidimeter, a temperature sensor and a conductivity meter are arranged behind each section of the forward osmosis membrane module and are used for assisting in monitoring the operation state of the forward osmosis membrane module.
The concentrated extracting solution of the forward osmosis membrane component does not introduce other components except the target solution into the target solution, and the extracting solution can be recovered by a nanofiltration or reverse osmosis system, so that the sewage discharge is reduced, and the processing technology is more green and environment-friendly.
Compared with the prior art, the utility model has the following beneficial effects:
1. the forward osmosis membrane concentration scale realizes multiple times of concentration of a target solution by controlling the osmotic pressure difference of solutions on two sides of the forward osmosis membrane;
2. no heat source or strong external pressure is introduced, so that the concentration of the target solution is realized;
3. the content and the proportion of the main nutrients of the target solution are maintained. Compared with reverse osmosis membrane concentration and freeze concentration, the forward osmosis membrane concentration technology can greatly improve the concentration multiple of the dairy product, simultaneously reduce unit energy consumption and save operation cost;
4. the membrane pollution, the membrane loss and the loss of effective components caused by high-pressure operation of reverse osmosis are avoided.
Example two
The difference between the forward osmosis device for fluid concentration provided by the present embodiment and the first embodiment is that:
and a flash evaporation concentration mode is adopted to replace a forward osmosis membrane module.
And heating the target solution under a negative pressure environment to promote the volatilization of water and the separation from the target solution, thereby realizing the concentration of the target solution.
Flash evaporation concentration is a heating process of a target solution, the characteristics of the product are greatly damaged, and the energy consumption is high.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (6)
1. A forward osmosis device for fluid concentration is characterized by comprising a raw material tank, a first liquid drawing tank, a second liquid drawing tank, a product storage tank, a forward osmosis membrane component, a target solution pump, a liquid drawing pump and a conductivity meter;
the forward osmosis membrane assembly is respectively connected with the raw material tank, the first liquid drawing tank, the second liquid drawing tank, the target solution pump, the liquid drawing pump and the conductivity meter; the conductivity meter is also connected with the product storage tank;
the method comprises the following steps that a target solution in a raw material tank enters a forward osmosis membrane assembly through a target solution pump, a draw solution in a first draw solution tank or a second draw solution tank enters the forward osmosis membrane assembly through a draw solution pump, a concentrated solution of the target solution in the forward osmosis membrane assembly is subjected to concentration detection through a conductivity meter, and when the conductivity meter detects that the concentration of the concentrated solution reaches a standard, the concentrated solution is conveyed to a product storage tank; and when the conductivity meter detects that the concentration of the concentrated solution does not reach the standard, returning the concentrated solution to the raw material tank.
2. A forward osmosis apparatus for fluid concentration according to claim 1, further comprising a reverse osmosis system, wherein one end of the reverse osmosis system is connected to the forward osmosis module, and the other end of the reverse osmosis system is connected to the first draw solution tank and the second draw solution tank.
3. A forward osmosis apparatus for fluid concentration according to claim 2, further comprising a temperature sensor, wherein one end of the temperature sensor is connected to one end of the conductivity meter, and the other end of the temperature sensor is connected to the product storage tank.
4. A forward osmosis apparatus for fluid concentration according to claim 3, further comprising a first pressure sensor and a second pressure sensor, wherein one end of the first pressure sensor is connected to the forward osmosis module, and the other end of the first pressure sensor is connected to the reverse osmosis system; one end of the second pressure sensor is connected with the temperature sensor, and the other end of the second pressure sensor is connected with the product storage tank.
5. The forward osmosis apparatus for concentrating a fluid according to claim 4, further comprising a turbidity meter, one end of the turbidity meter being connected to the first pressure sensor, and the other end of the turbidity meter being connected to the reverse osmosis system.
6. The forward osmosis apparatus for concentrating a fluid according to claim 1, further comprising a first flow meter and a second flow meter, wherein one end of the first flow meter is connected to the target solution pump, and the other end of the first flow meter is connected to the forward osmosis module; one end of the second flowmeter is connected with the forward osmosis component, and the other end of the second flowmeter is connected with the liquid drawing pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122723238.5U CN216367413U (en) | 2021-11-09 | 2021-11-09 | Forward osmosis device for fluid concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122723238.5U CN216367413U (en) | 2021-11-09 | 2021-11-09 | Forward osmosis device for fluid concentration |
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| Publication Number | Publication Date |
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| CN216367413U true CN216367413U (en) | 2022-04-26 |
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| CN202122723238.5U Active CN216367413U (en) | 2021-11-09 | 2021-11-09 | Forward osmosis device for fluid concentration |
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- 2021-11-09 CN CN202122723238.5U patent/CN216367413U/en active Active
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