CN102252891A - Multistage filtering device in water sample pretreatment system - Google Patents
Multistage filtering device in water sample pretreatment system Download PDFInfo
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- CN102252891A CN102252891A CN2011101002138A CN201110100213A CN102252891A CN 102252891 A CN102252891 A CN 102252891A CN 2011101002138 A CN2011101002138 A CN 2011101002138A CN 201110100213 A CN201110100213 A CN 201110100213A CN 102252891 A CN102252891 A CN 102252891A
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Abstract
The invention belongs to the technical field of water quality on-line analysis, and relates to a multistage filtering device in a water sample pretreatment system. The multistage filtering device is characterized in that a filtering tank body is composed of a sample introduction chamber, an intermediate filtering chamber and sample output chamber, wherein the all chambers are divided by filtering window assembly and liquid paths are interlinked. the filtering window assembly has a sealed frame-type double-layer grillage structure and is filled with a sheet material; and cleaning devices in the all chambers are fixedly connected to a top cover and are connected to a cleaning water pipe in the top cover, and water paths are interlinked. The multistage filtering device has the advantages that filtering window assembly can be filled with sheet materials with different drift diameters; mounting heights of filtering window assembly and a sample outlet is more than half of a height of each one of the all chambers; natural sedimentation of particles in each one of the all chambers and a filtering process adopting filtering windows are combined to realize good filtering effects; and when content of a soluble object needing to be measured is measured through a photometric method-based automatic analyzer, turbidity influences can be eliminated effectively and a correct measuring result is obtained.
Description
Technical field
The invention belongs to water quality on-line analysis technical field, relate to cascade filtration device in a kind of water sample pretreatment system, the cascade filtration device that particularly a kind of water quality online auto monitoring system solubility determinand photometric analysis test laboratory is used.
Background technology
Sewage discharge must reach the environmental protection emission standard, and the online auto monitoring that water pollutes every index is an important ring in the environmental protection work.At the water analysis test line in the industry, spectrophotometric method is one of instrument analytical method of using always, but the existence of higher turbidity (turbidity is higher than 50NTU) can have a strong impact on the correct measurement of photometric analysis instrument.There are conical hopper and suction funnel in the commercial goods that chemical laboratory is used for the water sample filtration, but products such as conical hopper and suction funnel all can't be applied to the on-line automatic filtration of water sample in the water quality online auto monitoring system.Particularly need to use the photometric analysis instrument to measure solubility determinand water sample occasion, can be applied in the automatic water quality monitoring system and the on-line automatic filtration unit of water sample that can remove turbidity effectively still belongs to blank.
Summary of the invention
The present invention seeks to: cascade filtration device in the automatic pretreatment system of a kind of water sample is provided, can not only be applied to the water quality online auto monitoring system, and can effectively remove the water sample turbidity.
For achieving the above object, the technical scheme that adopts is: cascade filtration device in a kind of water sample pretreatment system, comprise filter box and place filter box interior filtering window assembly and cleaning device, it is characterized in that: described filter box by the sample introduction cavity that is arranged in order, intermediate filtered cavity, go out the sample cavity and be composed in series, described sample introduction cavity, intermediate filtered cavity, go out between the sample cavity by the filtering window assembly to separate, the liquid road communicates; The filtering window assembly is the double-deck cell structure of seal frame formula, is filled with the filtering material of sheet between double-deck grid; Described sample introduction cavity, intermediate filtered cavity, go out in the sample cavity cleaning device and fixedly connected with top cover, and be connected with the rinse water pipeline pipeline in placing described top cover, the water route communicates, and described sample introduction cavity, intermediate filtered cavity, goes out the sample cavity bottom and is equipped with floss hole respectively; Described sample introduction cavity is equipped with injection port, overflow vent; Describedly go out the sample cavity and be equipped with outlet, overflow vent.
Described sample introduction cavity and the intermediate filtered number of cavities that goes out between the sample cavity have a plurality of.
Described cleaning device is a column type spiral fashion liquid at high speed fluidic device.
The sheet filtering material of filling between the double-deck grid of described filtering window assembly is filter screen or filter cloth or filter paper.
Described filtering window component mounting position is apart from cavity bottom 2/3 housing depth.
Described outlet installation site is apart from cavity bottom 1/2 housing depth.
Good effect of the present invention is: the sheet filtering material that can select to fill different latus rectums in the filtering window assembly by the rule of successively decreasing step by step, the setting height(from bottom) of filtering window assembly and outlet is again more than 1/2 of housing depth, each grade filters cavity endoparticle natural subsidence and combines with the filtering window filtration, good filtration effect, when measuring solubility determinand content with the photometry automatic analyzer in the water quality online auto monitoring, can effectively eliminate turbidity influences reed and gets correct measurement result.
Description of drawings
Illustrate with reference to the accompanying drawings below and embodiment that the invention will be further described.
Fig. 1 is a structural representation of the present invention.
Among the figure: 1-sample introduction cavity; 2-intermediate filtered cavity; 3-goes out the sample cavity; The 4-top cover; 5-cleans water pipe; 6.6 '-overflow vent; The 7-outlet; The 8-filter box; The 9-floss hole; 10-filtering window assembly; The 11-injection port; The 12-cleaning device.
Embodiment
Fig. 1 is a structural representation of the present invention, as seen from the figure, cascade filtration device in a kind of water sample pretreatment system, the filtering window assembly 10 and the cleaning device 12 that comprise filter box 8 and place filter box interior 8, it is characterized in that: described filter box 8 by the sample introduction cavity 1 that is arranged in order, intermediate filtered cavity 2, go out sample cavity 3 and be composed in series, described sample introduction cavity 1, intermediate filtered cavity 2, go out between the sample cavity 3 by filtering window assembly 10 to separate, the liquid road communicates; Filtering window assembly 10 is the double-deck cell structure of seal frame formula, is filled with the filtering material of sheet between double-deck grid; Described sample introduction cavity 1, intermediate filtered cavity 2, the cleaning devices 12 that go out in the sample cavity 3 are fixedlyed connected with top cover 4, and cleaning water pipe 5 pipelines interior with placing described top cover 4 are connected, and the water route communicates; Described sample introduction cavity 1, intermediate filtered cavity 2, go out sample cavity 3 bottoms and be equipped with floss hole 9 respectively; Described sample introduction cavity 1 sidewall be equipped with injection port 11, overflow vent 6 '; Describedly go out sample cavity 3 sidewalls and be equipped with outlet 7, overflow vent 6.
Described sample introduction cavity 1 and intermediate filtered cavity 2 quantity that go out between the sample cavity 3 have a plurality of.
Described cleaning device 12 is a column type spiral fashion liquid at high speed fluidic device.
The filtering material of the sheet of filling between the double-deck grid of described filtering window assembly 10 is filter screen or filter cloth or filter paper.
Described filtering window installation site is apart from cavity bottom 2/3 housing depth.
Described outlet installation site is apart from cavity bottom 1/2 housing depth.
During actual the use,, select the filtering material of the sheet of different latus rectums by the rule of successively decreasing step by step, between the double-deck grid of the corresponding filtering window assembly 10 of packing into according to the requirement of the turbidity and the photometry solubility determinand automatic analyzer of water sample; Water sample enters sample introduction cavity 1 through injection port 11, enter first order intermediate filtered cavity 2 by first order latus rectum filtering window assembly 10, enter second level intermediate filtered cavity by second level latus rectum filtering window assembly again and (only showed first order intermediate filtered cavity 2 among Fig. 1, second level intermediate filtered cavity does not draw ...), by that analogy, the final stage water sample enters out sample cavity 3, provides turbidity qualified water sample by outlet 7.After each finished in sampling period, described sample introduction cavity 1, each intermediate filtered cavity 2 and go out sample cavity 3 and discharge residue sample water by floss hole 9 respectively started then that cleaning device 12 cleans and the discharging cleaning liquid.Be to improve filter effect, guaranteeing to flow water sample sample water between cavity, certain precipitation buffering time, filtering window installation site are arranged is apart from cavity bottom 2/3 housing depth; The outlet installation site is apart from cavity bottom 1/2 housing depth.
Adopt through one deck middling speed quantitative filter paper that removes ammonia treatment and make filter disc, cascade filtration mode (as shown in Figure 1, only adopting one-level intermediate filtered cavity) is filtered turbidity respectively and is about 100,200, the former water sample of 400NTU, and the turbidity that filters the back water sample reaches below the 15NTU.With the national standard method GB/T 7479-1987 of water quality assay laboratory method respectively to before filtering and the water sample after filtering carry out ammonia-nitrogen content and measure, ammonia-nitrogen content does not have significant difference before and after filtering.Water sample after the filtration is measured with photometry automatic on-line nh 3-n analyser, and measured ammonia-nitrogen content and the aforementioned result who measures with water quality assay laboratory standard GB/T 7479-1987 method have good consistance; And with photometry automatic on-line nh 3-n analyser former water sample is directly measured, the water sample turbidity is when 50NTU to 150NTU, the measured value substantial deviation is by result that standard GB/T 7479-1987 method is measured, analyser check and correction at zero point failure can't be measured when the water sample turbidity was higher than 200NTU.
Claims (6)
1. cascade filtration device in the water sample pretreatment system, comprise filter box and place filter box interior filtering window assembly and cleaning device, it is characterized in that: described filter box by the sample introduction cavity that is arranged in order, intermediate filtered cavity, go out the sample cavity and be composed in series, described sample introduction cavity, intermediate filtered cavity, go out between the sample cavity by the filtering window assembly to separate, the liquid road communicates; The filtering window assembly is the double-deck cell structure of seal frame formula, is filled with the filtering material of sheet between double-deck grid; Described sample introduction cavity, intermediate filtered cavity, go out in the sample cavity cleaning device and fixedly connected with top cover, and be connected with the rinse water pipeline pipeline in placing described top cover, the water route communicates, and described sample introduction cavity, intermediate filtered cavity, goes out the sample cavity bottom and is equipped with floss hole respectively; Described sample introduction cavity is equipped with injection port, overflow vent; Describedly go out the sample cavity and be equipped with outlet, overflow vent.
2. according to cascade filtration device in the described a kind of water sample pretreatment system of claim 1, it is characterized in that: described sample introduction cavity and the intermediate filtered number of cavities that goes out between the sample cavity have a plurality of.
3. according to cascade filtration device in the described a kind of water sample pretreatment system of claim 1, it is characterized in that: described cleaning device is a column type spiral fashion liquid at high speed fluidic device.
4. according to cascade filtration device in the described a kind of water sample pretreatment system of claim 1, it is characterized in that: the sheet filtering material of filling between the double-deck grid of described filtering window assembly is filter screen or filter cloth or filter paper.
5. according to cascade filtration device in the described a kind of water sample pretreatment system of claim 1, it is characterized in that: described filtering window component mounting position is apart from cavity bottom 2/3 housing depth.
6. according to cascade filtration device in the described a kind of water sample pretreatment system of claim 1, it is characterized in that: described outlet installation site is apart from cavity bottom 1/2 housing depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101002138A CN102252891A (en) | 2011-04-21 | 2011-04-21 | Multistage filtering device in water sample pretreatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101002138A CN102252891A (en) | 2011-04-21 | 2011-04-21 | Multistage filtering device in water sample pretreatment system |
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| CN102252891A true CN102252891A (en) | 2011-11-23 |
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| CN2011101002138A Pending CN102252891A (en) | 2011-04-21 | 2011-04-21 | Multistage filtering device in water sample pretreatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840827A (en) * | 2017-03-28 | 2017-06-13 | 福州福光水务科技有限公司 | A kind of water sample multistage pretreatment unit |
| CN110553683A (en) * | 2019-09-18 | 2019-12-10 | 浙江海洋大学 | high-precision seawater salinity measuring device |
-
2011
- 2011-04-21 CN CN2011101002138A patent/CN102252891A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840827A (en) * | 2017-03-28 | 2017-06-13 | 福州福光水务科技有限公司 | A kind of water sample multistage pretreatment unit |
| CN110553683A (en) * | 2019-09-18 | 2019-12-10 | 浙江海洋大学 | high-precision seawater salinity measuring device |
| CN110553683B (en) * | 2019-09-18 | 2021-06-08 | 浙江海洋大学 | High-precision seawater salinity measuring device |
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Application publication date: 20111123 |