CN110879281B - Method for determining age of underground water - Google Patents
Method for determining age of underground water Download PDFInfo
- Publication number
- CN110879281B CN110879281B CN201811029633.XA CN201811029633A CN110879281B CN 110879281 B CN110879281 B CN 110879281B CN 201811029633 A CN201811029633 A CN 201811029633A CN 110879281 B CN110879281 B CN 110879281B
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- way valve
- gas
- freon
- port
- cryogenic
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- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 53
- 239000012159 carrier gas Substances 0.000 claims abstract description 46
- 239000003673 groundwater Substances 0.000 claims abstract description 27
- 238000005273 aeration Methods 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052722 tritium Inorganic materials 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
Abstract
The invention provides a method for determining the age of groundwater, which comprises the following steps: s1, introducing carrier gas to a Freon detector through a first six-way valve arranged on a first carrier gas branch; s2, replacing gas in the underground water in the sample bottle through a switch valve on the second carrier gas branch; and S3, introducing the gas into an aeration pipe for treatment, collecting the freon through a cryogenic collecting pipe, and entering the freon detector through a first six-way valve. The invention provides a method for determining the age of groundwater, which has a simple structure, and can obtain the freon content of groundwater and detect the freon content so as to obtain the accurate age of the groundwater.
Description
Technical Field
The invention relates to the technical field of groundwater resource evaluation, in particular to a method for determining the age of groundwater.
Background
Whether new water replenishment exists in groundwater is one of the very important problems in groundwater resource evaluation, and how to determine whether new water replenishment exists in groundwater is an eight-problem in hydrogeology work. Groundwater age determination is one of the important methods for identifying the source of groundwater.
In the prior art, a calibration measurement method of tritium is mostly adopted, but tritium is attenuated along with the year, and freon is used for measuring the water age, and although freon is not attenuated along with the year, how to obtain freon in groundwater is a key how to accurately measure the groundwater age, and the method still has a urgent need in the art for solving the problem.
Disclosure of Invention
Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
In order to overcome the problems in the prior art, the invention provides a method for determining the age of groundwater, which comprises the following steps:
s1, introducing carrier gas to a Freon detector through a first six-way valve arranged on a first carrier gas branch;
s2, replacing gas in the underground water in the sample bottle through a switch valve on the second carrier gas branch;
and S3, introducing the gas into an aeration pipe for treatment, collecting the freon through a cryogenic collecting pipe, and entering the freon detector through a first six-way valve.
Optionally, before the step S2, the method includes:
and introducing a freon standard sample gas with preset concentration on the third gas carrying branch, and introducing the freon standard sample gas into the aeration pipe through a second six-way valve.
Optionally, the introducing the freon standard gas with the preset concentration on the third carrier gas branch comprises:
and acquiring the Freon standard sample gas through an eight-way valve arranged on the third gas carrying branch and at least one sample injection needle valve connected with the eight-way valve.
Optionally, the step S3 includes:
s31, the gas processed by the aeration pipe is collected by a first cryogenic collecting pipe through a first four-way valve.
Optionally, after the step S31, the method includes:
s32, collecting the gas from the first cryogenic collecting pipe again through a second six-way valve, a third six-way valve and a second cryogenic collecting pipe in sequence.
Optionally, after the step S32, the method includes:
and enabling the gas collected by the first cryogenic collecting pipe and/or the second cryogenic collecting pipe to enter the Freon detector through a third six-way valve and a first six-way valve.
Optionally, after the step S32, the method includes:
the uncollected gas is metered and then evacuated by a float flow meter provided on the third six-way valve.
Optionally, before the step S1, the method includes:
and the carrier gas sequentially passes through a pressure reducing valve, a filter and a removal tank and then enters the first carrier gas branch and the second carrier gas branch.
The invention provides a method for determining the age of groundwater, which is simple to operate, and can obtain the freon content of groundwater and detect the freon content so as to obtain the accurate age of groundwater.
The features and content of these solutions will be better understood by those of ordinary skill in the art from a reading of the specification.
Drawings
The advantages and the manner of carrying out the invention will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which the content shown is meant to illustrate, but not to limit, the invention in any sense, and wherein:
fig. 1 is a flow chart of a method for determining the age of groundwater according to an embodiment of the invention.
Fig. 2 is a schematic diagram of a measurement system for implementing a method for measuring groundwater age according to an embodiment of the invention.
Fig. 3 is a schematic flow chart of step S3 in the embodiment of the present invention.
Fig. 4 is a schematic diagram of a structure for obtaining a standard freon gas sample of a predetermined concentration.
Detailed Description
As shown in fig. 1 and 2, the present invention provides a method for measuring the age of groundwater, comprising:
s1, introducing carrier gas to a Freon detector through a first six-way valve arranged on a first carrier gas branch;
the carrier gas is transported to the freon detector 12 through the first carrier gas branch 41, ensuring that the freon detector 12 can function properly. The first port of the first six-way valve 11 communicates with the first carrier gas branch 41, and the third, fifth and sixth ports are connected to the freon detector 12.
S2, replacing gas in the underground water in the sample bottle through a switch valve on the second carrier gas branch;
in one embodiment of the present invention, the on-off valve 21 may be a four-way valve, wherein a first port of the four-way valve is connected to the second carrier gas branch, a second port is connected to the lower end of the aerator pipe, a third port is connected to the fourth port and is connected to the sample bottle, and generally, the length of the needle tube connected to the third port is greater than that of the needle tube connected to the fourth port. When the switch valve is in an open state, carrier gas enters the sample injection bottle through the third port, and freon in the underground water comes out through the fourth port. More specifically, when the first port is in communication with the fourth port, the second port is also in communication with the third port, and the first port is not in communication with the second port, the third port and the fourth port, at this time, the carrier gas via the second carrier gas branch 42 will act as a stamping gas to stamp out the freon in the groundwater-filled sample bottle 22, and enter the aeration tube 37 via the second port of the four-way valve. When the first port communicates with the second port, the on-off valve 21 is in a closed state.
And S3, introducing the gas into an aeration pipe for treatment, collecting the freon through a cryogenic collecting pipe, and entering the freon detector through a first six-way valve.
In one embodiment of the present invention, as shown in fig. 3, the step S3 includes:
s31, the gas processed by the aeration pipe is collected by a first cryogenic collecting pipe through a first four-way valve.
S32, collecting the gas from the first cryogenic collecting pipe again through a second six-way valve, a third six-way valve and a second cryogenic collecting pipe in sequence.
S33, enabling the gas collected by the first cryogenic collecting pipe and/or the second cryogenic collecting pipe to enter the Freon detector through a third six-way valve and a first six-way valve.
In specific implementation, the gas can be collected through the aeration pipe 37, the first four-way valve 33, the first cryogenic collecting pipe 35, the second six-way valve 31, the third six-way valve 32, the second four-way valve 34 and the second cryogenic collecting pipe 36 in sequence, and after the collection is completed, the gas enters the freon detector through the third six-way valve 32 and the first six-way valve 11.
The second six-way valve 31 is disposed on the third carrier gas branch 43, and a first port of the second six-way valve 31 is connected to the third carrier gas branch 31; the second port of the second six-way valve 31 is connected to the first port of the third six-way valve via a dry pipe 61; the third port of the second six-way valve 31 is connected with the second port of the first four-way valve; the sixth port of the second six-way valve 31 is connected to an aeration pipe 37.
The first port of the third six-way valve 32 is connected to the second port of the second six-way valve 31; a second port of the third six-way valve 32 is connected to a second port of the second four-way valve 34; the third port of the third six-way valve 32 may be connected to the float flow meter 64 via an on-off control valve; the fourth port of the third six-way valve 32 is connected to the second port of the first flow valve 11; the fifth port of the third six-way valve 32 is connected to the fourth port of the first flow valve 11; the sixth port of the third six-way valve 32 is connected to the first port of the second four-way valve 34.
In the present embodiment, when the first port and the second port of the first six-way valve 11, the second six-way valve 31, and the third six-way valve 32 are in communication, the third port and the fourth port and the fifth port and the sixth port are also in communication, and the second port and the third port, the third port and the fifth port, and the sixth port and the first port are not in communication.
The aeration pipe 37 is connected with the switch valve 21 in the second six-way valve 31 and the water treatment unit 20; more specifically, the upper and lower ends of the aeration pipe 37 are respectively connected with three-way ball valves 39, 38, and freon coming out from the water treatment unit 20 can enter the aeration pipe 37 through the three-way ball valves 39 for treatment. The treated gas is regulated to be exhausted or enters downstream treatment through a three-way ball valve 39 at the top end of the aeration pipe.
When the gas is regulated to enter downstream processing, the discharged gas is dehydrated by a drying pipe 63 and then enters a first four-way valve 33, a first cryogenic collecting pipe 35, a second four-way valve 34 and a second cryogenic collecting pipe 36 for sample processing. The first cryogenic collection tube 35 and/or the second cryogenic collection tube 36 comprise a thermos cup and a U-shaped collection tube positioned within the thermos cup. The vacuum cup can be filled with liquid nitrogen and water at 85-95 ℃, such as water at 90 ℃, so that when the air is required to be exhausted, the Freon is condensed and collected in the U-shaped collecting pipe, and when the Freon is required to be collected and detected, the Freon is released.
In this embodiment, the first port of the first four-way valve 33 is connected to the three-way ball valve 39 on the aeration pipe 37 via the drying pipe 63, the second port of the first four-way valve 33 is connected to the third port of the second six-way valve 31 via the drying pipe 62, and the third port and the fourth port of the first four-way valve 33 are connected to two ends of the U-shaped collecting pipe, respectively. The first port of the second four-way valve 34 is connected with the sixth port of the third six-way valve 32, the second port of the second four-way valve 34 is connected with the second port of the third six-way valve 32, and the third port and the fourth port of the second four-way valve 34 are respectively connected with two ends of the U-shaped collecting pipe.
In the first and second four-way valves 33 and 34, when the first port is communicated with the fourth port, the second port is also communicated with the third port, and the first port is not communicated with the second port, and the third port is not communicated with the fourth port.
The Freon from the first cryogenic collecting pipe 35 is dried by a drying pipe 62, enters a second six-way valve 31 for adjustment, is dried by a drying pipe 61, enters a third six-way valve 32 for adjustment for emptying, or enters a first six-way valve 11 for chromatographic analysis by a Freon detector 12. In addition, the freon from the first cryogenic collecting pipe 35 enters the second six-way valve 31 to be regulated after being dried by the drying pipe 62 and enters the third six-way valve 32 after being dried by the drying pipe 61, then enters the second four-way valve 34 and the second cryogenic collecting pipe 36 through the third six-way valve 32, and then is discharged through the third six-way valve 32 or enters the first six-way valve 11 to be subjected to chromatographic analysis by the freon detector 12.
Optionally, after step S32, the method includes metering and evacuating the uncollected gas by providing a float flow meter on the third six-way valve. That is, upon regulating the vent via the third six-way valve 32, the vented gas may be metered by the float flow meter 64 and vented.
In one embodiment of the present invention, before the step S2, the method includes:
and introducing a freon standard sample gas with preset concentration on the third gas carrying branch, and introducing the freon standard sample gas into the aeration pipe through a second six-way valve.
In specific implementation, the freon standard sample gas can be obtained through an eight-way valve arranged on the third gas carrying branch and at least one sample injection needle valve connected with the eight-way valve.
As shown in fig. 4, an eight-way valve 71 is provided on the third carrier branch 43; more specifically, the carrier gas on the third carrier gas branch is regulated via the eight-way valve 71 and enters the first port of the second six-way valve 31 in the freon processing unit 30. The first port of the eight-way valve 71 is connected to the third gas-carrying branch, the second port is connected to the sixth port, the third port is used for evacuation, the fourth port is connected to the eighth port, the fifth port is connected to the first port of the second six-way valve 31, and the seventh port is connected to the injection needle valve as an injection port.
In the embodiment, 4 sample injection needle valves are provided, so that the concentration of freon gas in 10 can be regulated. The sample injection needle valve 72 for the standard sample 1, the sample injection needle valve 73 for the standard sample 2, the manual sample injection needle valve 74 and the standby sample injection needle valve 75 are respectively provided, and the number of the sample injection needle valves is not limited, and can be 2, 3 or 5 or more.
Preferably, a pressure reducing valve 77 and a drying pipe 76 may be further provided in the third carrier gas branch, and the carrier gas may enter the eight-way valve 71 after passing through the pressure reducing valve 77 and the drying pipe 76.
Optionally, on the basis of any one of the foregoing embodiments, before step S1, the method includes:
and the carrier gas sequentially passes through a pressure reducing valve, a filter and a removal tank and then enters the first carrier gas branch and the second carrier gas branch.
As shown in fig. 2, the first carrier gas branch 41, the second carrier gas branch 42 and the third carrier gas branch 43 are communicated with the fish carrier gas main channel 40. The carrier gas main channel 40 is connected with a pressure reducing valve, a filter and a removal tank from front to back in sequence. That is, the nitrogen gas decompressed by the liquid nitrogen steel cylinder decompression valve is filtered by the filter and then enters the removal tank for removing water and freon to remove water and freon. The clean gas is divided into three parts, namely a first carrier gas branch 41, a second carrier gas branch 42 and a third carrier gas branch 43, and the gas of the first carrier gas branch 41 is regulated by a needle valve and then enters the first six-way valve 11; the gas of the second carrier gas branch 42 enters the switching valve 21 through needle valve adjustment as stamping gas; the gas of the third gas-carrying branch 43 is regulated by a needle valve into the second six-way valve 31.
The invention provides a method for determining the age of groundwater, which is simple to operate, and can obtain the freon content of groundwater and detect the freon content so as to obtain the accurate age of groundwater.
While the preferred embodiments of the present invention have been illustrated by reference to the accompanying drawings, those skilled in the art will appreciate that many modifications are possible in carrying out the invention without departing from the scope and spirit thereof. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. The foregoing description and drawings are merely illustrative of preferred embodiments of the present invention and are not intended to limit the scope of the claims, but rather to cover all modifications within the scope of the present invention.
Claims (3)
1. A method for determining the age of groundwater, comprising:
s1, introducing carrier gas to a Freon detector through a first six-way valve arranged on a first carrier gas branch;
s2, replacing gas in the underground water in the sample bottle through a switch valve on the second carrier gas branch;
s3, introducing gas into an aeration pipe for treatment, collecting freon through a cryogenic collecting pipe, and entering the freon detector through a first six-way valve;
wherein, before the step S1, the method includes: the carrier gas sequentially passes through a pressure reducing valve, a filter and a removal tank and then enters the first carrier gas branch and the second carrier gas branch;
before the step S2, the method includes: acquiring Freon standard sample gas through an eight-way valve arranged on a third gas carrying branch and at least one sample injection needle valve connected with the eight-way valve, introducing the Freon standard sample gas with preset concentration on the third gas carrying branch, and introducing the Freon standard sample gas into the aeration pipe through a second six-way valve; the first port of the eight-way valve is connected to the third gas-carrying branch, the second port is connected to the sixth port, the third port is used for emptying, the fourth port is connected to the eighth port, the fifth port is connected to the first port of the second six-way valve (31), the seventh port is used as a sample inlet and connected to a sample injection needle valve, and the number of the sample injection needle valves is more than two;
the step S3 includes:
s31, collecting the gas treated by the aeration pipe through a first four-way valve by a first cryogenic collecting pipe;
s32, collecting the gas from the first cryogenic collecting pipe again through a second six-way valve, a third six-way valve and a second cryogenic collecting pipe in sequence;
s33, enabling the gas collected by the first cryogenic collecting pipe and/or the second cryogenic collecting pipe to enter the Freon detector through a third six-way valve and a first six-way valve;
the cryogenic collecting pipe comprises a vacuum cup and a U-shaped collecting pipe positioned in the vacuum cup, liquid nitrogen or water at the temperature of 85-95 ℃ is filled in the vacuum cup, and when the vacuum cup needs to exhaust, freon is condensed and collected in the U-shaped collecting pipe, and when the Freon needs to be collected and detected, the Freon is released.
2. The method for determining the age of groundwater according to claim 1, wherein the introducing a freon standard gas of a predetermined concentration into the third carrier gas branch comprises:
and acquiring the Freon standard sample gas through an eight-way valve arranged on the third gas carrying branch and at least one sample injection needle valve connected with the eight-way valve.
3. The method for determining the age of groundwater according to claim 1, wherein after the step S32, the method comprises:
the uncollected gas is metered and then evacuated by a float flow meter provided on the third six-way valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811029633.XA CN110879281B (en) | 2018-09-05 | 2018-09-05 | Method for determining age of underground water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811029633.XA CN110879281B (en) | 2018-09-05 | 2018-09-05 | Method for determining age of underground water |
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| CN110879281A CN110879281A (en) | 2020-03-13 |
| CN110879281B true CN110879281B (en) | 2024-02-13 |
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