CN217980900U - Online multifunctional water sample pretreatment system - Google Patents
Online multifunctional water sample pretreatment system Download PDFInfo
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- CN217980900U CN217980900U CN202221763045.0U CN202221763045U CN217980900U CN 217980900 U CN217980900 U CN 217980900U CN 202221763045 U CN202221763045 U CN 202221763045U CN 217980900 U CN217980900 U CN 217980900U
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Abstract
The utility model relates to an environmental protection technology field discloses a higher and convenient online multi-functional water sample pretreatment systems of reliability, possesses: the flow cell is used for containing a water sample to be detected; the sedimentation barrel is used for containing a water sample to be detected; the water sampling pump is used for extracting a water sample to be detected; the flocculating agent tank is used for storing a flocculating agent, is communicated with the settling barrel through a sample injection pump and is used for injecting the flocculating agent into the settling barrel; the central control system is used for measuring the water sample to be detected when the turbidity of the water sample to be detected reaches a preset range; after the water sample in the flow cell is emptied, a back washing system of the flow cell is started, the flocculated and settled water sample enters the flow cell through a pipeline and a filter, the flow cell is back washed, and the pipeline and the precision filter are back washed.
Description
Technical Field
The utility model relates to an environmental protection technology field, more specifically say, relate to an online multi-functional water sample pretreatment systems.
Background
The high-turbidity water sample contains a large amount of suspended matters and solid particles, so that the measurement process of the instrument is interfered, and the measurement accuracy is influenced. Meanwhile, the valve body of the high-precision pump valve can be abraded due to the existence of a large amount of solid particles, so that sampling quantity deviation is caused, and the blockage of an equipment pipeline can be caused.
Therefore, the pretreatment of the water sample needs to eliminate factors interfering with the analysis of the instrument and cannot lose the representativeness of the water sample. The existing pretreatment methods are usually natural sedimentation, physical filtration, centrifugation and the like.
However, the existing solutions have the following problems:
when a natural sedimentation pretreatment mode is adopted, different water bodies have different sedimentation effects, and particularly for colloid water bodies, the turbidity of a water sample can be reduced by adopting longer natural sedimentation;
when a physical filtration pretreatment mode is adopted, the filter screen filtration is greatly influenced by the particle size of particles in the water body, the filter screen is easy to block, and the water outlet speed and the water outlet quantity of the suction filtration mode are low, so that the online monitoring requirement cannot be met;
when a centrifugal pretreatment mode is adopted, the whole structure is complex, the power consumption is large, the size of the equipment is large, and the maintenance amount is large.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect that modes such as natural settling, physics filtration, centrifugation exist of prior art, provide a higher and convenient multi-functional water sample pretreatment systems of online of reliability.
The utility model provides a technical scheme that its technical problem adopted is: an online multifunctional water sample pretreatment system is constructed, and the online multifunctional water sample pretreatment system is provided with:
the flow cell is arranged in the water sample pretreatment system and is used for containing a water sample to be detected;
the sedimentation barrel is arranged in the water sample pretreatment system and is used for containing a water sample to be detected;
the water sampling pump is communicated with the flow cell and the sedimentation barrel through pipelines and is used for extracting a water sample to be detected;
the flocculating agent tank body is used for storing flocculating agents, is communicated with the settling barrel through a sample injection pump and is used for injecting the flocculating agents into the settling barrel;
the central control system controls the flocculating agent in the flocculating agent tank body to be injected into the sedimentation barrel according to a preset turbidity-flocculating agent proportional relation,
obtaining the turbidity of the water sample to be detected in the sedimentation barrel after sedimentation, and measuring the water sample to be detected when the turbidity of the water sample to be detected reaches a preset range;
and after the water sample in the flow cell is emptied, starting a backwashing system of the flow cell, allowing the flocculated and settled water sample to enter the flow cell through a pipeline and a filter, backwashing the flow cell, and backwashing the pipeline and the precision filter.
In some embodiments, a flow cell sample injection valve is arranged on the water discharge side of the water extraction pump, the water discharge side of the water extraction pump is communicated with the water inlet end of the flow cell sample injection valve through a pipeline,
a drain valve of the flow-through pool is arranged at the drain side of the flow-through pool,
and a drainage valve of the sedimentation barrel is arranged on the drainage side of the sedimentation barrel.
In some embodiments, a settling barrel sample injection valve is arranged on the water discharge side of the water sampling pump, and the water sample to be detected flows into the settling barrel through the water sampling pump and the pipeline and the settling barrel sample injection valve.
In some embodiments, a first level switch is disposed within the flow cell for detecting a first level signal of the flow cell,
and feeding back the detected first liquid level signal to the central control system, and controlling the working state of the water sampling pump according to the fed back first liquid level signal.
In some embodiments, a second liquid level switch and a third liquid level switch are arranged in the settling barrel, the second liquid level switch and the third liquid level switch respectively detect a second liquid level signal and a third liquid level signal of the settling barrel,
and feeding back the second liquid level signal and the third liquid level signal to the central control system, and turning off the water extraction pump by the central control system according to the fed back second liquid level signal and the fed back third liquid level signal.
In some embodiments, a turbidity probe is arranged on the sedimentation barrel and used for acquiring the initial turbidity of the water sample to be detected in the sedimentation barrel and uploading the initial turbidity to the central control system,
the central control system starts the flocculating agent tank body and the sample injection pump according to a preset turbidity-flocculating agent proportional relation, and flocculating agents in the flocculating agent tank body enter the settling barrel through a pipeline.
In some embodiments, a stirring motor is disposed at an upper end of the settling tank, and the water sample in the settling tank is stirred by the stirring motor.
In some embodiments, a primary filter is also included, wherein,
the input side of the primary filter is communicated with the other water discharge end of the settling barrel through a booster pump,
the output side of the primary filter is connected with the water inlet side of the precision filter through a pipeline.
In some embodiments, the system further comprises an external pipeline back flush valve, and the external pipeline back flush valve is communicated with the flow cell sample injection valve through a pipeline.
In some embodiments, the device further comprises a back-flushing valve of the flow cell, and the back-flushing valve of the flow cell is communicated with the flow cell through a pipeline.
In the on-line multifunctional water sample pretreatment system, a water sample is firstly extracted, the circulation pool is subjected to water sample rinsing, and then a flocculating agent is injected to complete the filling of the pipeline and the water sample rinsing of the sedimentation barrel; then extracting a water sample to be detected; according to a preset turbidity-flocculant proportional relation, injecting a flocculant into a settling tank, settling to obtain the turbidity of a water sample in the settling tank, and measuring the water sample when the turbidity of the water sample reaches a preset range; and after the water sample measurement is finished, backwashing is carried out on the flow cell, the pipeline and the precision filter. Compared with the prior art, the scheme has the following technical effects:
the system has the functions of water sample pretreatment and automatic generation of system backwashing water;
the flocculation sedimentation pretreatment mode is adopted, the reagent addition amount is automatically adjusted according to different water quality conditions, and the method is suitable for various water bodies;
construction for obtaining backwash water is omitted during station building, the station building cost is low, the later maintenance amount is small, and the maintenance cost is low;
the water quality on-line monitoring device has the advantages of small occupied space, simple structure, capability of being quickly integrated in a water quality on-line monitoring system and great advantage compared with the existing water treatment device.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the utility model discloses a first embodiment of online multi-functional water sample pretreatment systems, online multi-functional water sample pretreatment systems mainly include the flow cell 5, settling cask 8, at least one water sampling pump and the flocculating agent jar body 24.
Wherein, the flow cell 5 is configured in the water sample pretreatment system and is used for containing the water sample to be detected.
The sedimentation barrel 8 is arranged in the water sample pretreatment system and used for containing a water sample to be detected.
And the at least one water sampling pump is communicated with the flow cell 5 and the sedimentation barrel 8 through pipelines and is used for extracting a water sample to be detected.
The flocculating agent tank body 24 is used for storing flocculating agent, and the flocculating agent tank body 24 is communicated with the sedimentation barrel 8 through a sample injection pump and used for injecting flocculating agent into the sedimentation barrel 8.
The central control system (not shown) is arranged in the water sample pretreatment system and is provided with a turbidity-flocculating agent proportional relation.
Wherein, a central control system (not shown) controls the flocculating agent in the flocculating agent tank body 24 to be injected into the sedimentation barrel 8 according to a preset turbidity-flocculating agent proportional relation,
the flocculating agent in the flocculating agent jar body 24 pours into the setting vessel 8 into, and the water sample turbidity that awaits measuring in the setting vessel 8 is acquireed after subsiding, when waiting to detect the water sample turbidity and reaching the preset limit, treats to detect the water sample and measures.
After the water sample in the flow cell 5 is emptied, a back washing system of the flow cell 5 is started, the flocculated and settled water sample enters the flow cell 5 through the pipeline and the filter, the flow cell 5 is back washed, and the pipeline and the precision filter are back washed.
Furthermore, a flow Chi Jinyang valve V1 is arranged on the discharge water side of the water sampling pump M1, the discharge water side of the water sampling pump M1 is communicated with the water inlet end of the flow cell sample injection valve V1 through a pipeline, a flow cell drain valve V2 is arranged on the discharge water side of the flow cell 5, and a settling barrel drain valve V4 is arranged on the discharge water side of the settling barrel 8.
Wherein, set up a settling cask inlet valve V3 in the drainage water side of water sampling pump M1, treat that the water sample flows into settling cask 8 through water sampling pump M1 and pipeline and settling cask inlet valve V3.
Specifically, water sample rinsing: opening a sample inlet valve V1 of the flow cell, a liquid outlet valve V2 of the flow cell and a liquid outlet valve V4 of a sedimentation barrel, starting a water sampling pump M1, enabling a water sample to flow into the flow cell 5 through the water sampling pump M1, a pipeline 2, a pipeline 3 and a pipeline 4, and closing the water sampling pump M1, the liquid outlet valve V2 of the flow cell and a flow Chi Jinyang valve V1 after a certain time (for example, 10min-20 min) to finish water sample rinsing of the flow cell 5.
And starting the flocculant sample injection pump M3, enabling the flocculant tank body 24 to flow into the sedimentation barrel 8 through the pipeline 23, and closing the flocculant sample injection pump M3 after a certain time (for example, 10min-20 min) to finish the filling of the flocculant pipeline.
Further, the flow cell sample injection valve V1, the sedimentation barrel sample injection valve V3 and the water sampling pump M1 are opened, the water sample flows into the sedimentation barrel 8 through the water sampling pump M1, the pipeline 6 and the pipeline 7, and after a certain time (for example, 10min to 20 min), the water sampling pump M1, the sedimentation barrel liquid discharge valve V4 and the flow cell sample injection valve V1 are closed, thereby completing the water sample rinsing of the sedimentation barrel 8.
The extraction is waited to detect the water sample, waits to detect the water sample and flows into flow cell 5, when accomplishing the water sample extraction of flow cell 5, carries out the sedimentation tank 8 again and carries out the water sample extraction.
Specifically, sample introduction: opening flow cell sampling valve V1, starting water sampling pump M1, treating the water sample and flowing into flow cell 5 through water sampling pump M1, pipeline 2, pipeline 3 and pipeline 4.
When a water flow switch S at the output side of the sampling valve V1 of the flow cell is triggered, the water flow switch S feeds a sampling signal back to a central control system (not shown) to indicate normal sampling.
When the first liquid level switch YE1 in the flow cell 5 feeds back the detected first liquid level signal to a central control system (not shown), the central control system (not shown) judges that the sampling of the flow cell 5 is completed according to the fed back first liquid level signal, and the water sampling pump M1 and the flow cell sample injection valve V1 are closed.
When the flow cell 5 finishes the extraction of the water sample, the sedimentation barrel sample introduction valve V3 and the water sampling pump M1 are opened, the water sample to be detected flows into the sedimentation barrel 8 through the water sampling pump M1 and the pipeline,
wherein, be equipped with second liquid level switch YE2 and third liquid level switch YE3 in the settling cask, second liquid level switch YE2 and third liquid level switch YE3 detect the second liquid level signal and the third liquid level signal of settling cask 8 respectively to with second liquid level signal and third liquid level signal feedback to central control system, central control system closes water pump M1 according to the liquid level signal of feedback.
When the second liquid level switch YE2 feeds back the second liquid level signal of the sedimentation barrel 8 to the central control system, the central control system closes the water extraction pump M1 and the sedimentation barrel sample inlet valve V3 according to the second liquid level signal.
Particularly, when the flow cell 5 finishes water sample extraction, the sedimentation barrel sample inlet valve V3 is opened, the water sampling pump M1 is adopted, and a water sample to be detected flows into the sedimentation barrel 8 through the water sampling pump M1, the pipeline 6 and the pipeline 7.
When the second liquid level switch YE2 outputs a second liquid level signal to the central control system, or the second liquid level switch YE2 and the third liquid level switch YE3 simultaneously output a second liquid level signal and a third liquid level signal to the central control system, the central control system (not shown) judges that the sedimentation barrel 8 finishes sampling according to the fed back second liquid level signal and the third liquid level signal, and closes the water collecting pump M1 and the sedimentation barrel sample inlet valve V3.
Detect the initial turbidity value of water sample in the settling cask 8 to upload initial turbidity value to central control system, central control system is according to preset turbidity-flocculating agent proportional relation, pours into the settling cask 8 with flocculating agent jar body 24, acquires the interior water sample turbidity of settling cask 8 after subsiding, when the water sample turbidity reaches preset range, measures the water sample.
And further, after the water sample to be detected in the flow cell is settled for 30min, sampling and measuring.
Furthermore, a turbidity probe is arranged on the sedimentation barrel 8 to read the initial turbidity of the water sample and upload the initial turbidity to a central control system (not shown),
a central control system (not shown) starts a flocculating agent tank body 24 and a sample injection pump M3 according to a preset turbidity-flocculating agent proportional relation, the flocculating agent tank body 24 enters the sedimentation barrel 8 through a pipeline, when a set value is reached, the flocculating agent tank body 24 and the sample injection pump M3 are closed,
starting the stirring motor M4, after a certain time (for example, 15min-25 min), closing the stirring motor M4, performing flocculation sedimentation, during the sedimentation, reading the turbidity of the water sample in the sedimentation barrel 8 in real time by a central control system (not shown) through a turbidity probe, and when the turbidity of the water sample reaches a range value required by the measuring instrument, starting the instrument to extract the water sample for measurement.
Specifically, the pretreatment: the water sample in the flow cell 5 is directly used for the measurement of probes such as dissolved oxygen, turbidity, pH, conductivity, temperature and the like without any pretreatment, so that the accuracy of multi-parameter measurement data is ensured.
In addition, for an instrument which is not affected by turbidity, such as an electrode method CODmn, after the flow Chi Shuiyang settles for 30min, sampling and measurement are carried out.
Further, the initial turbidity of the water sample is firstly read by a turbidity probe installed on the settling tank 8, and the data is uploaded to a central control system (not shown), the flocculating agent sample injection pump M3 is started by the central control system (not shown) through a preset turbidity-flocculating agent addition amount relation, the flocculating agent in the flocculating agent tank body 24 enters the settling tank 8 through a pipeline 23, and the flocculating agent sample injection pump M3 is closed after the preset addition amount is reached.
Starting the stirring motor M4, and after a certain time (for example, 15min-25 min), closing the stirring motor M4 to perform flocculation and sedimentation. During the subsidence, central control system (not shown) reads the water sample turbidity in the sedimentation bucket 8 in real time through turbidity probe, and after the water sample turbidity reached the range value that measuring instrument required, the start instrument extracted the water sample and measures.
Starting the emptying system, after the water sample in the flow cell 5 is emptied, starting the back washing system of the flow cell 5, allowing the flocculated and settled water sample to enter the flow cell 5 through the pipeline and the filter, back washing the flow cell 5, and back washing the pipeline and the precision filter.
Opening a liquid discharge valve V2 of the flow cell, opening a back flush valve V9, a back flush valve V7 and a booster pump M5 of the flow cell after a water sample in the flow cell 5 is emptied, enabling the flocculated and settled water sample to enter the flow cell through a primary filter 11, a precision filter and a pipeline,
and after the backwashing time is up, closing the booster pump M5, the backwashing valve V7 and the backwashing valve V9 of the flow cell to complete the backwashing of the flow cell.
Starting a back flush V8 of an external pipeline, a flow Chi Jinyang valve V1, a back flush valve V7 and a booster pump M5, leading the flocculated and settled water sample to enter a water sampling pump M1 through a primary filter (11), a pipeline, a filter and a pipeline,
and after the backwashing time is up, the booster pump M5 and the backwashing valve V7 are closed, the air inlet valve V10 of the air compressor is opened, and the air in the air compressor M6 enters the water sampling pump M1 through the pipeline to empty the water sample in the water sampling pipeline.
And after the pipeline is emptied, closing an air inlet valve V10 of the air compressor, a flow Chi Jinyang valve V1 and an external pipeline backwashing valve V8 to finish the external pipeline backwashing.
And in the fourth step, a drain valve V5 of the primary filter is opened, a booster pump M5 is started, the flocculated and settled water sample is drained to a drain tank through a pipeline, and after a certain time (for example, 10min-25 min), the booster pump M5 and the drain valve V5 of the primary filter are closed, so that the back washing of the primary filter is completed.
And (3) opening a drain valve V6 and a booster pump M5 of the precision filter, discharging the flocculated and settled water sample to a drain tank through a pipeline, and closing the booster pump M5 and the drain valve V6 of the precision filter after a certain time (for example, 10min-25 min) to finish the back washing of the precision filter.
Specifically, backwashing: the drain valve V2 of the flow cell is opened. After the water sample in the flow cell 5 is emptied, a back flush valve V9, a back flush valve V7 and a booster pump M5 of the flow cell are opened, and the flocculated and settled water sample enters the flow cell 5 through a primary filter 11, a pipeline 12, a precision filter 13, a precision filter 14, a pipeline 15, a pipeline 16 and a pipeline 18 through a pipeline 10.
And after the backwashing time is up, closing the booster pump M5, the backwashing valve V7 and the flow cell backwashing valve V9 to complete the backwashing on the flow cell 5.
After the back flushing of the flow cell 5 is finished, an external pipeline back flushing V8, a flow Chi Jinyang valve V1, a back flushing valve V7 and a booster pump M5 are started, and a flocculated and settled water sample enters the water sampling pump through a pipeline 10, a primary filter 11, a pipeline 12, a precision filter 13, a precision filter 14, a pipeline 15, a pipeline 16, a pipeline 17, a pipeline 3, a pipeline 2 and a pipeline 1. After the backwashing time is up, the booster pump M5 and the backwashing valve V7 are closed, the air inlet valve V10 of the air compressor is opened, air in the air compressor M6 enters the water collecting pump M1 through the pipeline 19, the pipeline 17, the pipeline 3, the pipeline 2 and the pipeline 1, a water sample in the water collecting pipeline is emptied, and algae breeding and pipeline freezing damage in winter are prevented. And after the pipeline is emptied, closing an air inlet valve V10 of the air compressor, a flow Chi Jinyang valve V1 and an external pipeline backwashing valve V8 to finish the external pipeline backwashing.
After the back flushing of the external pipeline is finished, a primary filter drain valve V5 is opened, a booster pump M5 is started, the flocculated and settled water sample is drained to a drain tank through a pipeline 10, a pipeline 31, a pipeline 29 and a pipeline 28, and after a certain time (for example, 10min-25 min), the booster pump M5 and the primary filter drain valve V5 are closed, so that the back flushing of the primary filter 11 is finished.
After the back washing of the primary filter 11 is completed, the drain valve V6 of the precision filter and the booster pump M5 are opened, the flocculated and settled water sample is discharged to a drain tank through the pipeline 10, the pipeline 12, the pipeline 30, the pipeline 29 and the pipeline 28, and after a certain time (for example, 10min to 25 min), the booster pump M5 and the drain valve V6 of the precision filter are closed, so that the back washing of the precision filter 13 and the precision filter 14 is completed.
The technical scheme has the following technical effects:
the device has the functions of water sample pretreatment and automatic generation of system backwashing water;
the flocculation sedimentation pretreatment mode is adopted, the reagent addition is automatically adjusted according to different water quality conditions, and the method is suitable for various water bodies;
construction for obtaining backwashing water is omitted during station building, the station building cost is low, the later maintenance amount is small, and the maintenance cost is low;
the water quality on-line monitoring device has the advantages of small occupied space, simple structure, capability of being quickly integrated in a water quality on-line monitoring system and great advantage compared with the existing water treatment device.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the scope of the present invention, and these forms are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides an online multi-functional water sample pretreatment systems which characterized in that possesses:
the flow cell (5) is arranged in the water sample pretreatment system and is used for containing a water sample to be detected;
the sedimentation barrel (8) is arranged in the water sample pretreatment system and is used for containing a water sample to be detected;
the water sampling pump is communicated with the flow cell (5) and the sedimentation barrel (8) through pipelines and is used for extracting a water sample to be detected;
the flocculant tank body is used for storing a flocculant, is communicated with the settling barrel (8) through a sample injection pump and is used for injecting the flocculant into the settling barrel (8);
a central control system which controls the flocculating agent in the flocculating agent tank body (24) to be injected into the sedimentation barrel (8) according to a preset turbidity-flocculating agent proportional relation,
obtaining the turbidity of the water sample to be detected in the sedimentation barrel (8) after sedimentation, and measuring the water sample to be detected when the turbidity of the water sample to be detected reaches a preset range;
after the water sample in the flow cell (5) is emptied, starting a back washing system of the flow cell (5), allowing the flocculated and settled water sample to enter the flow cell (5) through a pipeline and a filter, back washing the flow cell (5), and back washing the pipeline and the precision filter.
2. The on-line multifunctional water sample pretreatment system according to claim 1,
a circulating Chi Jinyang valve (V1) is arranged on the water discharging side of the water collecting pump (M1), the water discharging side of the water collecting pump (M1) is communicated with the water inlet end of a circulating Chi Jinyang valve (V1) through a pipeline,
a drainage side of the flow cell (5) is provided with a flow cell drainage valve (V2),
and a sedimentation barrel liquid discharge valve (V4) is arranged on the water discharge side of the sedimentation barrel (8).
3. The on-line multifunctional water sample pretreatment system according to claim 2,
and a sedimentation barrel sample injection valve (V3) is arranged on the discharge water side of the water sampling pump (M1), and the water sample to be detected flows into the sedimentation barrel (8) through the water sampling pump (M1), a pipeline and the sedimentation barrel sample injection valve (V3).
4. The online multifunctional water sample pretreatment system according to claim 3,
a first liquid level switch (YE 1) is arranged in the flow cell (5) and is used for detecting a first liquid level signal of the flow cell (5),
and feeding back the detected first liquid level signal to the central control system, and controlling the working state of the water pump according to the fed back first liquid level signal.
5. The online multifunctional water sample pretreatment system according to claim 4,
a second liquid level switch (YE 2) and a third liquid level switch (YE 3) are arranged in the sedimentation barrel (8), the second liquid level switch (YE 2) and the third liquid level switch (YE 3) respectively detect a second liquid level signal and a third liquid level signal of the sedimentation barrel (8),
and feeding back the second liquid level signal and the third liquid level signal to the central control system, and turning off the water extraction pump (M1) by the central control system according to the fed back second liquid level signal and the fed back third liquid level signal.
6. The online multi-purpose water sample pretreatment system according to claim 5,
a turbidity probe is arranged on the sedimentation barrel (8) and is used for acquiring the initial turbidity of the water sample to be detected in the sedimentation barrel (8) and uploading the initial turbidity to the central control system,
the central control system starts the flocculant tank body (24) and the sampling pump (M3) according to a preset turbidity-flocculant proportional relation, and the flocculant in the flocculant tank body (24) enters the settling tank (8) through a pipeline.
7. The on-line multifunctional water sample pretreatment system according to claim 6,
the upper end of the settling barrel (8) is provided with a stirring motor (M4), and the stirring motor (M4) is used for stirring the water sample of the settling barrel (8).
8. The online multi-purpose water sample pretreatment system according to claim 7,
further comprising a primary filter (11), wherein,
the input side of the primary filter (11) is communicated with the other water discharge end of the settling barrel (8) through a booster pump (M5),
the output side of the primary filter (11) is connected with the water inlet side of the precision filter (13) through a pipeline.
9. The on-line multifunctional water sample pretreatment system according to claim 8,
the device also comprises a back-flushing valve (V8) of an external pipeline, wherein the back-flushing valve (V8) of the external pipeline is communicated with the flow Chi Jinyang valve (V1) through a pipeline.
10. The on-line multifunctional water sample pretreatment system according to claim 9,
the device also comprises a back-flushing valve (V9) of the flow cell, wherein the back-flushing valve (V9) of the flow cell is communicated with the flow cell (5) through a pipeline.
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