CN103674668B - Pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass - Google Patents
Pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass Download PDFInfo
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- CN103674668B CN103674668B CN201310668027.3A CN201310668027A CN103674668B CN 103674668 B CN103674668 B CN 103674668B CN 201310668027 A CN201310668027 A CN 201310668027A CN 103674668 B CN103674668 B CN 103674668B
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Abstract
The invention discloses pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass, it is connected through pipeline by shell-and-tube polysulfone hollow fiber ultrafiltration membrane system, shell-and-tube Middle hollow fiber membrane enricher, each cable tubing flow control valve, peristaltic pump and fluid collection vials and constitutes.Which reducing the transport of water sample with bulk mass and carry, this device is guarded without people, can detect with multidraw, in-situ processing, decreases human and material resources cost, conveniently promotes the use of in each environmental monitoring station.
Description
Technical field
The invention belongs to water quality monitoring field, particularly relate to pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass.
Background technology
In water quality monitoring, collection in worksite water sample is that one extremely important and the work of key.According to the relevant national standard of water sampling, generally require and carry out multidraw in representative position, so sample size is the most more.The sample gathered is by the limit value of the factors such as transport, storage, so the sample size gathered is generally not capable of the biggest.For some pollutant (persistence organic pollutant), owing to its concentration in water is relatively low, the restriction of instrument testing conditions in addition, so these water samples are when lab analysis, pollutant are often difficult to detect, thus have impact on the supervision to some persistence organic pollutant and control.
For this problem, solution is exactly to strengthen the collection capacity of water sample, transports and detect to assay laboratory after having gathered.This method can improve really to the detection range of pollutant levels in water sample, but it is too big to there is also water sampling amount, and water sampling ground distance assay office is farther out in addition, thus increases the labor intensity of sampling, adds the cost of sample collecting.
In addition, the so many water samples collected, need to experience several times of liquid liquid extraction, not only need to consume a large amount of volatile organic solvent, and also need due to raffinate through repeatedly shifting, result is highly contaminating logistics and loses, and causes the water pollutant inaccurate problem of Concentration Testing value.The more important thing is, the use of a large amount of volatile organic solvents, it is easy to environment is caused secondary pollution, therefore in the urgent need to a kind of new equipment for water sample with bulk mass pre-treatment, preferably realize field investigation and sampling, on the spot pretreatment, without or number of times less sample transfer, and through separation, enrichment after sample simple process a little, it is possible to directly carry out Instrumental Analysis.
Summary of the invention
It is an object of the invention to provide pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass, it is achieved to the continuous flow separation of pollutant, enrichment in water sample with bulk mass, simplify the step of sampling and analysing operation.
Present invention employs following technical proposals: pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass, including water sample storing bottle, water sample sample introduction peristaltic pump, water sample pre-filtering flow control valve, shell-and-tube polysulfone hollow fiber ultrafiltration membrane system, filtrate storing bottle, filtrate sample introduction peristaltic pump, filtrate sample introduction flow control valve, shell-and-tube Middle hollow fiber membrane enricher, extract flow control valve, extract peristaltic pump, extract receiving flask, it is characterized in that described water sample storing bottle connects water sample sample introduction peristaltic pump by pipeline, water sample pre-filtering flow control valve is connected after water sample sample introduction peristaltic pump, it is then connected to shell-and-tube polysulfone hollow fiber ultrafiltration membrane system, the reflux line leading to water sample storing bottle is had on shell-and-tube polysulfone hollow fiber ultrafiltration membrane system；The filtrate port of shell-and-tube polysulfone hollow fiber ultrafiltration membrane system is connected to filtrate storing bottle through pipeline, filtrate storing bottle connects filtrate sample introduction peristaltic pump by pipeline, filtrate sample introduction peristaltic pump connects filtrate sample introduction flow control valve, being then connected to shell-and-tube Middle hollow fiber membrane enricher, shell-and-tube Middle hollow fiber membrane enricher is provided with the reflux line leading to filtrate storing bottle；The extract outlet of shell-and-tube Middle hollow fiber membrane enricher is connected to extract receiving flask, connect on extract receiving flask and have extract peristaltic pump, connect after extract peristaltic pump and have extract flow control valve, extract flow control valve is connected to shell-and-tube Middle hollow fiber membrane enricher, forms closed-loop path.
Hollow-fibre membrane inner chamber two of described shell-and-tube Middle hollow fiber membrane enricher is all open state, has two runners inside membrane module, and one is the runner along hollow fiber film thread inner chamber；One is the runner outside hollow-fibre membrane.
Described shell-and-tube Middle hollow fiber membrane enricher internal filling polypropylene or the hydrophobic hollow fiber film thread such as polyethylene or politef.
The technique effect of the present invention: decrease the transport of water sample with bulk mass and carry, this device is guarded without people, can be detected with multidraw, in-situ processing, decreases human and material resources cost, conveniently promotes the use of in each environmental monitoring station.Through checking, the enrichment times of the contaminants in drainage of certain factory being reached 389 ~ 464, the response rate reaches 77 ~ 92%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In the drawings, 1, water sample storing bottle 2, water sample sample introduction peristaltic pump 3, water sample pre-filtering flow control valve 4, shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 5, filtrate storing bottle 6, filtrate sample introduction peristaltic pump 7, filtrate sample introduction flow control valve 8, shell-and-tube Middle hollow fiber membrane enricher 9, extract flow control valve 10, extract peristaltic pump 11, extract receiving flask.
Detailed description of the invention
In order to make it easy to understand, the present invention is further elucidated with preferred embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, pollutant online pre-separation enriching apparatus in a kind of water sample with bulk mass, including water sample storing bottle 1, water sample sample introduction peristaltic pump 2, water sample pre-filtering flow control valve 3, shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 4, filtrate storing bottle 5, filtrate sample introduction peristaltic pump 6, filtrate sample introduction flow control valve 7, shell-and-tube Middle hollow fiber membrane enricher 8, extract flow control valve 9, extract peristaltic pump 10, extract receiving flask 11, it is characterized in that described water sample storing bottle 1 connects water sample sample introduction peristaltic pump 2 by pipeline, water sample pre-filtering flow control valve 3 is connected after water sample sample introduction peristaltic pump 2, it is then connected to shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 4, the reflux line leading to water sample storing bottle 1 is had on shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 4；The filtrate port of shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 4 is connected to filtrate storing bottle 5 through pipeline, filtrate storing bottle 5 connects filtrate sample introduction peristaltic pump 6 by pipeline, filtrate sample introduction peristaltic pump 6 connects filtrate sample introduction flow control valve 7, being then connected to shell-and-tube Middle hollow fiber membrane enricher 8, shell-and-tube Middle hollow fiber membrane enricher 8 is provided with the reflux line leading to filtrate storing bottle 5；The extract outlet of shell-and-tube Middle hollow fiber membrane enricher 8 is connected to extract receiving flask 11, connect on extract receiving flask 11 and have extract peristaltic pump 10, after extract peristaltic pump, 10 connections have extract flow control valve 9, extract flow control valve 9 is connected to shell-and-tube Middle hollow fiber membrane enricher 8, forms closed-loop path.Hollow-fibre membrane inner chamber two of described shell-and-tube Middle hollow fiber membrane enricher 8 is all open state, has two runners inside membrane module, and one is the runner along hollow fiber film thread inner chamber；One is the runner outside hollow-fibre membrane.Described shell-and-tube Middle hollow fiber membrane enricher 8 internal filling polypropylene or the hydrophobic hollow fiber film thread such as polyethylene or politef.
During work, water sample is deposited in water sample storing bottle 1, water sample sample introduction peristaltic pump 2, after pumping into shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 4, filter out bulky grain thing therein and impurity, deposit in filtrate storing bottle 5.Operation pressure is realized by the water sample pre-filtering flow control valve 3 in loop.Organic solvent extract is deposited in extract receiving flask 11.Water sample after filtering is sent in shell-and-tube Middle hollow fiber membrane enricher 8 by water sample sample introduction peristaltic pump 6, flows through from shell-side.Extract in extract receiving flask 11, in extract peristaltic pump 10 sends into shell-and-tube Middle hollow fiber membrane enricher 8, flows through from tube side.Water sample and extract combine on the hole wall of the hollow fiber film thread of shell-and-tube Middle hollow fiber membrane enricher 8.Water sample and extract form two-phase interface in hydrophobic hollow-fibre membrane, and auto extractive occurs on interface, and the target contaminant in water sample is extracted liquid and is extracted in extract.Select suitable water sample flow velocity and extract flow velocity by regulation filtrate sample introduction flow control valve 7 and extract flow control valve 9 during extraction, thus realize the maximum recovering effect of pollutant.After separation and concentration process terminates, by the extract whole taking-ups from extract receiving flask 11, deposit in sample collection bottle, send assay laboratory back to, Instrumental Analysis can be carried out through simple process.
The water sample needing detection only need to be taken by overall process to be deposited in water sample storing bottle 1, open the switch of water sample sample introduction peristaltic pump 2, open filtrate sample introduction peristaltic pump 6 and extract peristaltic pump 10, regulation water sample pre-filtering flow control valve 3, filtrate sample introduction flow control valve 7 and extract flow control valve 9, just can realize the pretreatment of sample, separate and be enriched with, finally give the detection sample after enrichment method.Needing the sample size carried little, labor intensity is low, can carry out Instrumental Analysis after simple process immediately, saves cost of transportation and sampling cost.
A concrete operations example is set forth below.
Accurately measure 20L water sample with 20L sampling bucket in certain enterprise's discharge outlet, the water inlet pipe in pollutant on-line preconcentration device in water sample with bulk mass is inserted in sampling bucket (as water sample storing bottle 1).Accurately measure 1000mL toluene solvant to be placed in extract receiving flask.Open water sample sample introduction peristaltic pump 2, allow water sample flow in shell-and-tube polysulfone hollow fiber ultrafiltration membrane system 4 with 1L/min.After liquid to be filtered storing bottle 5 has the feed liquid enough circulated in pipeline, open filtrate sample introduction peristaltic pump 6 and extract peristaltic pump 10, water sample after treatment is allowed to flow through the shell side of shell-and-tube Middle hollow fiber membrane enricher 8 with 0.5L/min, extract flows through the tube side of shell-and-tube Middle hollow fiber membrane enricher 8 with 0.3L/min, the flow in different six roads is realized by the aperture regulating the valve in each self-loop, after water sample has processed in bucket, close water sample sample introduction peristaltic pump 2.After the filtrate separation and concentration of liquid to be filtered storing bottle 5 terminates, close filtrate sample introduction peristaltic pump 6 and extract peristaltic pump 10, and the extract in extract receiving flask 11 is poured in sample collection bottle in the lump together with the residual liquid in extraction pipeline, take back lab analysis.
Claims (2)
1. pollutant online pre-separation enriching apparatus in a water sample with bulk mass, including water sample storing bottle, water sample sample introduction peristaltic pump, water sample pre-filtering flow control valve, shell-and-tube polysulfone hollow fiber ultrafiltration membrane system, filtrate storing bottle, filtrate sample introduction peristaltic pump, filtrate sample introduction flow control valve, shell-and-tube Middle hollow fiber membrane enricher, extract flow control valve, extract peristaltic pump, extract receiving flask, it is characterized in that described water sample storing bottle connects water sample sample introduction peristaltic pump by pipeline, water sample pre-filtering flow control valve is connected after water sample sample introduction peristaltic pump, it is then connected to shell-and-tube polysulfone hollow fiber ultrafiltration membrane system, the reflux line leading to water sample storing bottle is had on shell-and-tube polysulfone hollow fiber ultrafiltration membrane system；The filtrate port of shell-and-tube polysulfone hollow fiber ultrafiltration membrane system is connected to filtrate storing bottle through pipeline, filtrate storing bottle connects filtrate sample introduction peristaltic pump by pipeline, filtrate sample introduction peristaltic pump connects filtrate sample introduction flow control valve, being then connected to shell-and-tube Middle hollow fiber membrane enricher, shell-and-tube Middle hollow fiber membrane enricher is provided with the reflux line leading to filtrate storing bottle；The extract outlet of shell-and-tube Middle hollow fiber membrane enricher is connected to extract receiving flask, connect on extract receiving flask and have extract peristaltic pump, connect after extract peristaltic pump and have extract flow control valve, extract flow control valve is connected to shell-and-tube Middle hollow fiber membrane enricher, forms closed-loop path;
Described shell-and-tube Middle hollow fiber membrane enricher is internal loads hydrophobic hollow fiber film thread；
Hollow-fibre membrane inner chamber two of described shell-and-tube Middle hollow fiber membrane enricher is all open state, has two runners inside membrane module, and one is the runner along described hollow fiber film thread inner chamber；One is along the runner outside described hollow fiber film thread;
In the shell-and-tube Middle hollow fiber membrane enricher described in described water sample sample introduction peristaltic pump is sent into of the water sample after filtering, the runner outside described hollow fiber film thread flows through；
Extract in described extract receiving flask is in described extract peristaltic pump sends into described shell-and-tube Middle hollow fiber membrane enricher, and the runner of described hollow fiber film thread inner chamber flows through；
Described water sample and described extract form two-phase interface in described hydrophobic hollow fiber film thread, and at described two-phase interface generation auto extractive, the target contaminant in described water sample with bulk mass is extracted liquid and is extracted in extract；
By regulating the flow velocity of water sample described in described filtrate sample introduction flow control valve gate control during described extraction, by the flow velocity of extract described in described extract flow adjustable valve gate control.
Pollutant online pre-separation enriching apparatus in water sample with bulk mass the most according to claim 1, is characterized in that described hollow fiber film thread is polypropylene, polyethylene or politef.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106179773B (en) * | 2015-05-06 | 2018-09-21 | 中国科学院烟台海岸带研究所 | A kind of continuous flowing separating flotation device and method of microparticle plastics |
| CN110470808A (en) * | 2018-05-11 | 2019-11-19 | 中国石油化工股份有限公司 | Water quality many reference amounts detection device and detection method based on manual injector |
| CN109115555B (en) * | 2018-10-15 | 2021-02-19 | 浙江省海洋水产研究所 | Bay aromatic hydrocarbon enrichment facility |
| CN109701393B (en) * | 2019-01-01 | 2021-03-02 | 中国人民解放军63653部队 | Underground water colloid in-situ tangential flow ultrafiltration device |
| CN114935484B (en) * | 2022-05-25 | 2023-04-21 | 南京大学 | Low-carbon efficient large-volume water sample on-site rapid enrichment and separation device and method |
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