CN109701392B - N2 driving type tangential flow ultrafiltration device - Google Patents
N2 driving type tangential flow ultrafiltration device Download PDFInfo
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- CN109701392B CN109701392B CN201910000251.2A CN201910000251A CN109701392B CN 109701392 B CN109701392 B CN 109701392B CN 201910000251 A CN201910000251 A CN 201910000251A CN 109701392 B CN109701392 B CN 109701392B
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Abstract
The invention discloses an N2 driving type tangential flow ultrafiltration device which comprises a nitrogen pressure bottle, a second raw sample barrel and a first raw sample barrel, wherein the top of the nitrogen pressure bottle is fixedly provided with an air outlet main pipe, and the front surface of the air outlet main pipe is fixedly provided with a pressure reducing valve. This N2 drive formula tangential flow ultrafiltration device, when carrying out trace colloid enrichment in the bulk water, can realize whole nitrogen protection, thereby isolated atmosphere, keep the inert atmosphere, make the difficult characters or the form that changes of colloid and other easy oxidation composition in the aquatic, thereby make the analysis work of enrichment back colloid and other compositions more accurate, all structures with the sample contact all adopt the polytetrafluoroethylene inside lining simultaneously, in order to reduce the adsorption loss of colloid on the pipe wall, and the shape of the interior bucket of first former appearance bucket and the former appearance bucket of second is coniform, can make and remain the stoste less, thereby can prevent the colloid, the easy adsorption loss of adsorption element on the pipe wall, the wall.
Description
Technical Field
The invention relates to the field of environmental science, in particular to an N2 driven tangential flow ultrafiltration device.
Background
The presence of trace amounts of colloids plays a non-negligible role in the migration of radionuclides. Generally, the above-mentioned related research work can be smoothly carried out only by separating and enriching a trace amount of colloid to a certain concentration. The colloid is extremely unstable, and the conventional techniques such as filtration and precipitation are difficult to realize the enrichment of trace colloid. At present, related tangential flow ultrafiltration technology is developed internationally, separation and enrichment of trace colloids under a tangential flow field can be realized, and blockage of a filter membrane and perforation under large pressure are avoided. However, the current tangential flow ultrafiltration technology has the defects of no portability, easy denaturation of colloid due to air contact and the like, and cannot meet the requirements of stable and efficient enrichment of trace colloid in a field site.
Disclosure of Invention
The invention aims to provide an N2 driven type tangential flow ultrafiltration device to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a N2 drive formula tangential flow ultrafiltration device, includes former appearance bucket of nitrogen gas pressure bottle, second and first former appearance bucket, the top fixed mounting of nitrogen gas pressure bottle has the person in charge of giving vent to anger, the positive fixed mounting who gives vent to anger to be responsible for has the relief pressure valve, the bottom fixed mounting who gives vent to anger to be responsible for has the branch pipe, the equal fixed mounting in both sides of branch pipe bottom has the branch pipe of giving vent to anger, and the bottom of two branch pipes of giving vent to anger runs through the top of former appearance bucket of second and first former appearance bucket respectively and extends to the inside of former appearance bucket of second and first former appearance bucket, fixed mounting has communicating pipe between former appearance bucket of second and the first former appearance bucket, the middle part fixed mounting of communicating pipe has five-position two-way valve, the bottom of five-position two-way valve is provided with the milipore filter, the delivery port fixed mounting of milipore filter has the recovery tube, the bottom fixed mounting of recovery tube, the top of communicating pipe just is located five position two-way valve right side fixed mounting and has the second manometer, the front of communicating pipe just is located the right side fixed mounting of second manometer and has the flowmeter.
As a further scheme of the invention: the first original sample barrel consists of a cylindrical steel outer barrel and a conical polytetrafluoroethylene inner barrel, and the second original sample barrel and the first original sample barrel are identical in structure and size.
As a still further scheme of the invention: the filtrate bucket is cylindrical, and the filtrate bucket inner wall is polytetrafluoroethylene material.
As a still further scheme of the invention: the five-position two-way valve is an electromagnetic valve with timing and flow direction conversion functions, the second position of the five-position two-way valve is fixedly connected with the nitrogen pressure bottle, the fifth position of the five-position two-way valve is connected with the first original sample barrel, and the fourth position of the five-position two-way valve is connected with the second original sample barrel.
As a still further scheme of the invention: the nitrogen pressure bottle is a common steel nitrogen pressure bottle, the nitrogen storage pressure of the nitrogen pressure bottle is greater than Mpa, the pressure reducing valve is a common gas pressure reducing valve, the flowmeter is a common liquid flowmeter, and the flow range is greater than 0.5-10 mL/s.
As a still further scheme of the invention: and the five-position two-way valve, the recovery pipe and the communicating pipe are all lined with polytetrafluoroethylene.
Compared with the prior art, the invention has the beneficial effects that:
the utility model can realize the whole nitrogen protection when enriching the trace colloid in the large volume of water, thereby isolating the atmosphere, keeping the inert atmosphere, leading the colloid and other easily oxidized components in the water not to change the characters or the forms easily, thereby ensuring that the analysis work of the enriched colloid and other components is more accurate, simultaneously, all structures contacted with the sample adopt polytetrafluoroethylene linings, so as to reduce the absorption loss of the colloid on the pipe wall, and the inner barrel of the first original sample barrel and the second original sample barrel is in a conical shape, so that the residual original liquid can be reduced, thereby preventing the absorption loss of colloid and easily-absorbed elements on the pipe wall and the wall of the pipe, realizing the positive pressure drive of N2, thereby need not electric power support, the field operation of being convenient for facilitates the use, and the non-destructive enrichment of this device can realize the micro-colloid in bulky aquatic simultaneously, and can realize the continuous full-automatic unmanned on duty operation of 50~200L water sample.
Drawings
Fig. 1 is a schematic structural diagram of an N2 driven tangential flow ultrafiltration device.
FIG. 2 is a diagram showing the power-off state of a five-position two-way valve in the N2-driven tangential flow ultrafiltration device.
FIG. 3 is a diagram showing the energization state of a five-position two-way valve in the N2-driven tangential flow ultrafiltration device.
In the figure: the device comprises a nitrogen pressure bottle 1, a pressure reducing valve 2, a branch pipe 3, a main gas outlet pipe 4, a branch gas outlet pipe 5, a first pressure gauge 6, a five-position two-way valve 7, a second pressure gauge 8, a flowmeter 9, an ultrafiltration membrane 10, a recovery pipe 11, a second raw sample barrel 12, a filtrate barrel 13, a communicating pipe 14 and a first raw sample barrel 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in the embodiment of the present invention, an N2 driven tangential flow ultrafiltration apparatus includes a nitrogen pressure bottle 1, a second raw sample barrel 12 and a first raw sample barrel 15, an outlet main pipe 4 is fixedly installed on the top of the nitrogen pressure bottle 1, a pressure reducing valve 2 is fixedly installed on the front surface of the outlet main pipe 4, a branch pipe 3 is fixedly installed at the bottom of the outlet main pipe 4, outlet branch pipes 5 are fixedly installed on both sides of the bottom of the branch pipe 3, the bottoms of the two outlet branch pipes 5 respectively penetrate through the tops of the second raw sample barrel 12 and the first raw sample barrel 15 and extend to the interiors of the second raw sample barrel 12 and the first raw sample barrel 15, a communicating pipe 14 is fixedly installed between the second raw sample barrel 12 and the first raw sample barrel 15, a five-position two-way valve 7 is fixedly installed in the middle of the communicating pipe 14, when the five-position two-way valve 7 is in a power-off state, the second position and the fifth position are communicated, a sample is pressed into an ultrafiltration membrane, the residual liquid flows into a second original sample barrel 12, the pressure is released through a fourth position and a first position passage of a five-position two-way valve 7, the pressure difference is kept, when the five-position two-way valve 7 is in a power-on state, the second position and the fourth position are communicated, a sample is pressed into an ultrafiltration membrane 10 from the second original sample barrel 12, the residual liquid flows into a first original sample barrel 15, the pressure is released through a fifth position and a third position passage of the five-position two-way valve 7, the pressure difference is kept, an ultrafiltration membrane 10 is arranged at the bottom of the five-position two-way valve 7, the specification of the ultrafiltration membrane 10 can be one of 2 x 2m2 and 1 x 1m2, the pore diameter of the ultrafiltration membrane can be 3kd, 5kd, 10kd, 30kd and 100kd, a recovery pipe 11 is fixedly arranged at a water outlet of the ultrafiltration membrane 10, a filtrate barrel 13 is fixedly arranged at the bottom of the recovery pipe 11, a first pressure gauge 6 is fixedly arranged at the top of a communication pipe 14 and at the left side of the five-position two-, a flowmeter 9 is fixedly arranged on the front surface of the communicating pipe 14 and positioned at the right side of the second pressure gauge 8, the first original sample barrel 15 consists of a cylindrical steel outer barrel and a conical polytetrafluoroethylene inner barrel, the structural sizes of the second original sample barrel 12 and the first original sample barrel 15 are the same, the filtrate barrel 13 is cylindrical, the inner wall of the filtrate barrel 13 is made of polytetrafluoroethylene, the five-position two-way valve 7 is an electromagnetic valve with timing and flow direction conversion functions, the second position of the five-position two-way valve 7 is fixedly connected with the nitrogen pressure bottle 1, the fifth position of the five-position two-way valve 7 is connected with the first original sample barrel 15, the fourth position of the five-position two-way valve is connected with the second original sample barrel 12, the nitrogen pressure bottle 1 is a common steel nitrogen pressure bottle, the nitrogen storage pressure of the five-position two-way valve is greater than 18MPa, the pressure reducing valve 2 is a common gas pressure reducing valve, the flowmeter 9 is a common liquid flowmeter, the flow range is, the five-position two-way valve 7, the recovery pipe 11 and the communicating pipe 14 are all lined with polytetrafluoroethylene.
The working principle of the invention is as follows:
when the device is used, for example, 100L of underground water with the colloid content of more than 10kd is enriched to 500mL, the ultrafiltration membrane 10 adopts 2 x 2m2 and the aperture is 10kd, 100L of underground water sample containing trace colloid is taken into the first raw sample barrel 15, the pressure reducing valve 2 is opened, the pressure is adjusted to 2 atmospheric pressures, the five-position two-way valve 7 is in a power-off state, the sample in the first raw sample barrel 15 is slowly pressed into the ultrafiltration membrane 10 by N2, the filtrate flows into the filtrate barrel 13, the sample which is not ultrafiltered flows into the second raw sample barrel 12, after the sample in the first raw sample barrel 15 is completely pressed, the timer of the five-position two-way valve 7 is automatically started, the sample in the second raw sample barrel 12 is slowly pressed into the ultrafiltration membrane 10 by N2, the filtrate flows into the filtrate barrel 13, the sample which is not ultrafiltered flows into the first raw sample barrel 15, and so on, most of the filtrate can be filtered into the filtrate barrel 13 after about 20 hours, the concentrated sample in the first raw sample barrel 15, the second raw sample barrel 12 and the related sample collecting pipeline are collected, then waiting for analysis, when carrying out micro colloid enrichment in large volume water, the whole nitrogen protection can be realized, thereby isolating the atmosphere, keeping the inert atmosphere, and ensuring that the colloid and other easily-oxidized components in the water are not easy to change the characters or the shapes, thereby ensuring that the analysis work of the enriched colloid and other components is more accurate, simultaneously, all structures contacted with the sample adopt polytetrafluoroethylene lining to reduce the adsorption loss of the colloid on the pipe wall, and the shapes of the inner barrels of the first original sample barrel 15 and the second original sample barrel 12 are conical, thereby ensuring that the residual original liquid is less, preventing the adsorption loss of the colloid and the easily-adsorbed elements on the pipe wall and the wall, simultaneously realizing N2 positive pressure driving, thereby needing no electric power support, being convenient for field operation and use, simultaneously, the device can realize the non-destructive enrichment of the micro colloid in the large volume water, and the enrichment volume is more than 200L, the particle size of the enriched colloid is 3kd, 5kd, 10kd, 30kd, 100kd and the like, the loss of the colloid containing Pu is less than 10%, the particle size of the Pu colloid is equivalent to that before enrichment, and continuous full-automatic unattended operation of 50-200L of water sample can be realized.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (3)
1. N2Drive formula tangential flow ultrafiltration device, including nitrogen gas pressure bottle (1), former appearance bucket of second (12) and first former appearance bucket (15), its characterized in that: the top fixed mounting of nitrogen gas pressure bottle (1) has the person in charge of (4) of giving vent to anger, the positive fixed mounting who gives vent to anger person in charge (4) has relief pressure valve (2), the bottom fixed mounting who gives vent to anger person in charge (4) has branch pipe (3), the equal fixed mounting in both sides of branch pipe (3) bottom has branch pipe (5) of giving vent to anger, and the bottom of two branch pipe (5) of giving vent to anger runs through the top of second former appearance bucket (12) and first former appearance bucket (15) respectively and extends to the inside of second former appearance bucket (12) and first former appearance bucket (15), fixed mounting has communicating pipe (14) between second former appearance bucket (12) and first former appearance bucket (15), the middle part fixed mounting of communicating pipe (14) has five-position two-way valve (7), the bottom of five-position two-way valve (7) is provided with milipore, delivery port fixed mounting of milipore filter (10) has recovery tube (11), the bottom fixed mounting of recovery tube (11) has filtrate bucket (13), the top of communicating pipe (14) and the left side fixed mounting that is located five position two-way valve (7) have first manometer (6), the top of communicating pipe (14) and be located five position two-way valve (7) right side fixed mounting have second manometer (8), the front of communicating pipe (14) and the right side fixed mounting that is located second manometer (8) have flowmeter (9).
2. N according to claim 12 The driving type tangential flow ultrafiltration device is characterized in that: the first original sample barrel (15) consists of a cylindrical steel outer barrel and a conical polytetrafluoroethylene inner barrel, and the second original sample barrel (12) and the first original sample barrel (15) are identical in structure and size.
3. N according to claim 12 The driving type tangential flow ultrafiltration device is characterized in that: the five-position two-way valve (7) and the recovery pipe (11)) And the communicating pipe (14) and the communicating pipe are all lined with polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000251.2A CN109701392B (en) | 2019-01-01 | 2019-01-01 | N2 driving type tangential flow ultrafiltration device |
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|---|---|---|---|
| CN201910000251.2A CN109701392B (en) | 2019-01-01 | 2019-01-01 | N2 driving type tangential flow ultrafiltration device |
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| CN109701392A CN109701392A (en) | 2019-05-03 |
| CN109701392B true CN109701392B (en) | 2021-05-11 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995002725A1 (en) * | 1993-07-14 | 1995-01-26 | W.L. Gore & Associates (Uk) Ltd. | Apparatus and method for purifying a liquid by adsorption |
| DE19503191A1 (en) * | 1995-02-01 | 1996-08-08 | Hartmann Druckfarben Gmbh | Cross-flow filtration, to remove dispersion printing inks from process water |
| CN202909632U (en) * | 2012-11-14 | 2013-05-01 | 吉林大学 | Large-scale filtration sterilization device |
| CN204182291U (en) * | 2014-09-17 | 2015-03-04 | 重庆澳龙生物制品有限公司 | A kind of ultrafiltration system |
| CN206045799U (en) * | 2016-09-26 | 2017-03-29 | 北京霍尔斯生物科技有限公司 | A kind of small-sized cross-flow ultrafiltration equipment of Laboratary type |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030064951A1 (en) * | 1998-11-12 | 2003-04-03 | Valentis, Inc. | Methods for purifying nucleic acids |
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2019
- 2019-01-01 CN CN201910000251.2A patent/CN109701392B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995002725A1 (en) * | 1993-07-14 | 1995-01-26 | W.L. Gore & Associates (Uk) Ltd. | Apparatus and method for purifying a liquid by adsorption |
| DE19503191A1 (en) * | 1995-02-01 | 1996-08-08 | Hartmann Druckfarben Gmbh | Cross-flow filtration, to remove dispersion printing inks from process water |
| CN202909632U (en) * | 2012-11-14 | 2013-05-01 | 吉林大学 | Large-scale filtration sterilization device |
| CN204182291U (en) * | 2014-09-17 | 2015-03-04 | 重庆澳龙生物制品有限公司 | A kind of ultrafiltration system |
| CN206045799U (en) * | 2016-09-26 | 2017-03-29 | 北京霍尔斯生物科技有限公司 | A kind of small-sized cross-flow ultrafiltration equipment of Laboratary type |
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