A system for determining the age of groundwater

Abstract

The present invention provides a system for determining the age of groundwater, which includes a detection unit, a water treatment unit and a Freon treatment unit; wherein: the detection unit includes a first six-way valve arranged on a first carrier gas branch and a Freon detector connected thereto; the water treatment unit includes a switch valve arranged on a second carrier gas branch and a sample bottle connected to the switch valve; the Freon treatment unit includes: a second six-way valve arranged on a third carrier gas branch; an aeration pipe connected to the second six-way valve and the switch valve; a first deep-cold collection pipe connected to the aeration pipe and the second six-way valve through a first four-way valve; a third six-way valve connected to the second six-way valve and the first six-way valve; and a second deep-cold collection pipe connected to the third six-way valve through a second four-way valve. The present invention provides a system for determining the age of groundwater, which has a simple structure and can obtain the Freon content of groundwater and perform detection to obtain the precise age of groundwater.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater resource evaluation, and in particular to a groundwater age determination system. Background Art

[0002] Whether there is new water replenishment in groundwater is one of the most important issues in groundwater resource evaluation. How to determine whether there is new water replenishment in groundwater is a difficult problem in hydrogeological work. Groundwater age determination is one of the important methods to identify the source of groundwater.

[0003] Most water age measurement systems in the existing technology use tritium calibration measurement methods, but tritium will decay with years. When measuring water age with Freon, although Freon will not decay with years, how to obtain Freon in groundwater is the key to how to accurately determine the age of groundwater, which is still a difficult problem that needs to be overcome in this field. Summary of the invention

[0004] Features and advantages of the invention are set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.

[0005] In order to overcome the problems of the prior art, the present invention provides a system for determining the age of groundwater, which includes a detection unit, a water treatment unit and a Freon treatment unit; wherein:

[0006] The detection unit comprises a first six-way valve arranged on the first carrier gas branch, and a freon detector connected to the first six-way valve;

[0007] The water treatment unit comprises a switch valve arranged on the second carrier gas branch, and a sample bottle connected to the switch valve;

[0008] The freon processing unit comprises:

[0009] A second six-way valve is arranged on the third carrier gas branch;

[0010] an aeration pipe connected to the second six-way valve and the switch valve;

[0011] A first cryogenic collection pipe is connected to the aeration pipe and the second six-way valve via a first four-way valve;

[0012] a third six-way valve, connected to the second six-way valve and the first six-way valve;

[0013] The second deep-cold collecting pipe is connected to the third six-way valve through the second four-way valve.

[0014] Optionally, the switch valve is a four-way valve, 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 aeration tube, and a third port and a fourth port are connected to the sample bottle.

[0015] Optionally, the groundwater age determination system includes a sampling unit, which is arranged on the third carrier gas branch and before the freon processing unit, and the sampling unit includes:

[0016] An eight-way valve is arranged on the third carrier gas branch;

[0017] At least one injection needle valve is connected to the injection port of the eight-way valve.

[0018] Optionally, the groundwater age determination system includes a carrier gas main channel connected to the first carrier gas branch, the second carrier gas branch, and the third carrier gas branch.

[0019] Optionally, the carrier gas main channel is connected with a pressure reducing valve, a filter, and a removal tank in sequence from front to back.

[0020] Optionally, the first cryogenic collection tube or the second cryogenic collection tube comprises: a thermos cup and a U-shaped collection tube located in the thermos cup.

[0021] Optionally, the third six-way valve is connected to a float flowmeter for metering the gas and then discharging it.

[0022] The invention provides a groundwater age determination system, which has a simple structure and can obtain the freon content of groundwater and perform detection to obtain the precise age of the groundwater.

[0023] By reading the specification, ordinary technicians in this field will have a better understanding of the characteristics and contents of these technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with examples, and the advantages and implementation methods of the present invention will become more obvious. The contents shown in the accompanying drawings are only used to explain the present invention and do not constitute any limitation to the present invention in any sense. In the accompanying drawings:

[0025] Figure 1 Schematic diagram of the structure of a system for determining groundwater age according to an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of the structure of a Freon treatment unit according to an embodiment of the present invention.

[0027] Figure 3 It is a schematic structural diagram of a system for determining groundwater age according to another embodiment of the present invention.

[0028] Figure 4 Schematic diagram of the structure of the sample injection unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] like Figure 1 As shown, the present invention provides a system for determining the age of groundwater, comprising a detection unit 10, a water treatment unit 20 and a Freon treatment unit 30; wherein:

[0030] The detection unit 10 includes a first six-way valve 11 disposed on a first carrier gas branch 41, and a Freon detector 12 connected to the first six-way valve 11; the carrier gas is transported to the Freon detector 12 through the first carrier gas branch 41 to ensure that the Freon detector 12 can operate normally. The first port of the first six-way valve 11 is connected to the first carrier gas branch 41, and the third port, the fifth port and the sixth port are connected to the Freon detector 12. The second port and the fourth port of the first six-way valve 11 are connected to the Freon processing unit 30.

[0031] The water treatment unit 20 includes a switch valve 21 disposed on the second carrier gas branch 42, and a sample bottle 22 connected to the switch valve 21. In one embodiment of the present invention, the switch valve 21 may be a four-way valve, the first port of the four-way valve is connected to the second carrier gas branch, the second port is connected to the lower end of the aeration tube, the third port and the fourth port are connected to the sample bottle, and generally, the needle connected to the third port is longer than the needle connected to the fourth port. When the switch valve is in an open state, the carrier gas enters the injection bottle through the third port, and the Freon in the groundwater comes out through the fourth port. More specifically, when the first port is connected to the fourth port, the second port is also connected to the third port, and the first port is not connected to the second port, and the third port is not connected to the fourth port. At this time, the carrier gas through the second carrier gas branch 42 will be used as a punching gas to punch out the Freon in the sample bottle 22 containing groundwater, and enter the Freon treatment unit 30 through the second port of the four-way valve. When the first port is connected to the second port, the switch valve 21 is in a closed state.

[0032] like Figure 2 As shown, the Freon processing unit 30 includes: a second six-way valve 31, an aeration pipe 37, a first cryogenic collection pipe 35, a third six-way valve 32, and a second cryogenic collection pipe 36. The Freon processing unit 30 is used to collect Freon in sequence through the aeration pipe 37, the first four-way valve 33, the first cryogenic collection pipe 35, the second six-way valve 31, the third six-way valve 32, the second four-way valve 34, and the second cryogenic collection pipe 36, and after the collection is completed, the Freon enters the Freon detector through the third six-way valve 32 and the first six-way valve 11.

[0033] Among them, the second six-way valve 31 is arranged on the third carrier gas branch 43, and the 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 the drying pipe 61; the third port of the second six-way valve 31 is connected to the second port of the first four-way valve; the sixth port of the second six-way valve 31 is connected to the aeration pipe 37.

[0034] The first port of the third six-way valve 32 is connected to the second port of the second six-way valve 31; the second port of the third six-way valve 32 is connected to the second port of the second four-way valve 34; the third port of the third six-way valve 32 can be connected to the float flowmeter 64 via a switch control valve; the fourth port of the third six-way valve 32 is connected to the second port of the first circulation valve 11; the fifth port of the third six-way valve 32 is connected to the fourth port of the first circulation 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.

[0035] In this embodiment, when the first port of the first six-way valve 11, the second six-way valve 31, and the third six-way valve 32 are connected to the second port, the third port and the fourth port as well as the fifth port and the sixth port are also connected, while the second port and the third port, the third port and the fifth port, and the sixth port and the first port are not connected.

[0036] The aeration pipe 37 is connected to the second six-way valve 31 and the switch valve 21 in the water treatment unit 20; more specifically, the upper and lower ends of the aeration pipe 37 are respectively connected to three-way ball valves 39 and 38, and the Freon coming out of the water treatment unit 20 can enter the aeration pipe 37 for treatment through the three-way ball valve 39. The treated gas is vented or enters the downstream for treatment through the three-way ball valve 39 at the top of the aeration pipe.

[0037] When the downstream processing is regulated, the outflowing gas is dehydrated through the drying tube 63 and then enters the first four-way valve 33, the first cryogenic collection tube 35, the second four-way valve 34, and the second cryogenic collection tube 36 for sample processing. The first cryogenic collection tube 35 and / or the second cryogenic collection tube 36 include a thermos cup and a U-shaped collection tube located in the thermos cup. The thermos cup can be filled with liquid nitrogen and water at 85°C to 95°C, for example, 90°C, so that when exhaust is required, the Freon is condensed and collected in the U-shaped collection tube, and when the Freon needs to be collected and tested, the Freon is released.

[0038] 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 respectively connected to the two ends of the U-shaped collecting pipe. The first port of the second four-way valve 34 is connected to the sixth port of the third six-way valve 32, the second port of the second four-way valve 34 is connected to 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 to the two ends of the U-shaped collecting pipe.

[0039] In the first four-way valve 33 and the second four-way valve 34 , when the first port is connected to the fourth port, the second port is also connected to the third port, and the first port is not connected to the second port, and the third port is not connected to the fourth port.

[0040] The Freon coming out of the first cryogenic collection pipe 35 is dried by the drying pipe 62, then enters the second six-way valve 31 for regulation, and then enters the third six-way valve 32 for regulation and discharge, or enters the first six-way valve 11 for chromatographic analysis by the Freon detector 12. In addition, the Freon coming out of the first cryogenic collection pipe 35 is dried by the drying pipe 62, then enters the second six-way valve 31 for regulation, and then enters the third six-way valve 32 for drying by the drying pipe 61, then enters the second four-way valve 34 and the second cryogenic collection pipe 36 through the third six-way valve 32 for regulation and discharge, or enters the first six-way valve 11 for chromatographic analysis by the Freon detector 12. When regulating and discharging through the third six-way valve 32, the discharged gas can be discharged after being measured by the float flowmeter 64.

[0041] Please refer to Figure 1 The groundwater age determination system provided in this embodiment includes a carrier gas main channel 40, which is connected to a first carrier gas branch 41, a second carrier gas branch 42, and a third carrier gas branch 43. The carrier gas main channel 40 is connected with a pressure reducing valve 51, a filter 52, and a removal tank 53 from front to back. That is to say, the nitrogen after being decompressed by the liquid nitrogen cylinder pressure reducing valve 51 enters the water and Freon removal tank 53 after being filtered by the filter 52 to remove water and Freon. The clean gas is divided into three parts, namely the first carrier gas branch 41, the second carrier gas branch 42, and the third carrier gas branch 43. The gas of the first carrier gas branch 41 is adjusted by the needle valve 44 to enter the first six-way valve 11; the gas of the second carrier gas branch 42 is adjusted by the needle valve 46 to enter the switch valve 21 as the ramming gas; the gas of the third carrier gas branch 43 is adjusted by the needle valve 45 to enter the Freon treatment unit 30.

[0042] like Figure 3 , Figure 4As shown, the embodiment of the present invention provides a system for determining the age of groundwater, including a detection unit 10, a water treatment unit 20 and a Freon treatment unit 30; wherein: the detection unit 10, the water treatment unit 20 and the Freon treatment unit 30 are Figure 1 , Figure 2 The detection unit 10, the water treatment unit 20 and the Freon treatment unit 30 in the corresponding embodiments have the same structure. The difference is that the groundwater age determination system provided in the embodiment of the present invention includes a sampling unit 70, which is arranged on the third carrier gas branch 43 and is located before the Freon treatment unit 30. The sampling unit 43 includes an eight-way valve 71 and at least one sampling needle valve connected to the sampling port of the eight-way valve.

[0043] The eight-way valve 71 is arranged on the third carrier gas branch; more specifically, the carrier gas on the third carrier gas branch enters the first port of the second six-way valve 31 in the Freon treatment unit 30 after being adjusted by the eight-way valve 71. The first port of the eight-way valve 71 is connected to the third carrier gas branch, the second port is connected to the sixth port, the third port is used for exhaust, 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.

[0044] In this embodiment, there are 4 injection needle valves, which can adjust 10 concentrations of Freon gas, namely standard sample 1 injection needle valve 72, standard sample 2 injection needle valve 73, manual injection needle valve 74, and spare injection needle valve 75. It should be noted that the present invention does not limit the number of injection needle valves, which can be 2, 2, 3 or 5 or even more.

[0045] Preferably, a pressure reducing valve 77 and a drying tube 76 may be further provided on the third carrier gas branch, so that the carrier gas passes through the pressure reducing valve 77 and the drying tube 76 before entering the eight-way valve 71 .

[0046] The invention provides a groundwater age determination system, which has a simple structure and can obtain the freon content of groundwater and perform detection to obtain the precise age of the groundwater.

[0047] The preferred embodiments of the present invention are described above with reference to the accompanying drawings. A person skilled in the art may implement the present invention in a variety of variations without departing from the scope and essence of the present invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to obtain another embodiment. The above are only preferred feasible embodiments of the present invention, and do not limit the scope of rights of the present invention. Any equivalent changes made using the contents of the present specification and the accompanying drawings are included in the scope of rights of the present invention.

Claims

1. A system for determining the age of groundwater, characterized in that: It includes a detection unit, a water treatment unit and a Freon treatment unit; wherein: The detection unit comprises a first six-way valve arranged on the first carrier gas branch, and a freon detector connected to the first six-way valve; The water treatment unit comprises a switch valve arranged on the second carrier gas branch, and a sample bottle connected to the switch valve; The freon processing unit comprises: A second six-way valve is arranged on the third carrier gas branch; an aeration pipe connected to the second six-way valve and the switch valve; A first cryogenic collection pipe is connected to the aeration pipe and the second six-way valve via a first four-way valve; a third six-way valve, connected to the second six-way valve and the first six-way valve; A second cryogenic collection pipe is connected to the third six-way valve via a second four-way valve; The first cryogenic collection tube or the second cryogenic collection tube comprises: a thermos cup and a U-shaped collection tube located in the thermos cup; The groundwater age determination system includes a sampling unit, which is arranged on the third carrier gas branch and before the freon processing unit, and the sampling unit includes: An eight-way valve is arranged on the third carrier gas branch; At least one injection needle valve is connected to the injection port of the eight-way valve.

2. The groundwater age determination system according to claim 1, characterized in that: The switch valve is a four-way valve, 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 aeration pipe, and a third port and a fourth port are connected to the sample bottle.

3. The groundwater age determination system according to claim 1, characterized in that: The groundwater age determination system comprises a main carrier gas channel, which is connected with the first carrier gas branch, the second carrier gas branch and the third carrier gas branch.

4. The system for determining the age of groundwater according to claim 3, characterized in that: The carrier gas main channel is connected with a pressure reducing valve, a filter and a removal tank in sequence from front to back.

5. The system for measuring groundwater age according to claim 1, characterized in that: The third six-way valve is connected with a float flowmeter for measuring and then discharging the gas.

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