CN206740711U - A kind of new device for determining water body diffused methane release flux - Google Patents
A kind of new device for determining water body diffused methane release flux Download PDFInfo
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- CN206740711U CN206740711U CN201720446383.4U CN201720446383U CN206740711U CN 206740711 U CN206740711 U CN 206740711U CN 201720446383 U CN201720446383 U CN 201720446383U CN 206740711 U CN206740711 U CN 206740711U
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- static chamber
- methane
- water body
- new device
- determining water
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Abstract
The utility model discloses a kind of new device for determining water body diffused methane release flux, including static chamber and upside down funnel；The bottom opening of the upside down funnel is placed in below static chamber, and the methane bubble exit at top is located above static chamber through static chamber top surface, and diffused methane air hatch is provided with the top of the static chamber.New device provided by the utility model, funnel is inverted under static chamber, for collecting methane bubble, avoids it from entering the measure of static chamber interference diffused methane, so as to improve diffused Methane determination success rate.
Description
Technical field
A kind of device for determining water body diffused methane release flux is the utility model is related to, belongs to water body greenhouse gases and releases
Put device for measuring flux field.
Background technology
In recent years, climate warming result in the Extreme Weather Events such as arid, flood, hurricane and take place frequently.Methane is as second largest
Contribution of the greenhouse gases to greenhouse effects is up to 20%.Natural water body is considered as one of main source of methane release.With lake
Exemplified by, methane emission is 8~48Tg yr-1, account for the 6~16% of global total volume.At present, on water body methane release phase
Pass field has become study hotspot both domestic and external.
Solubility of the methane in water body is relatively low, and when water temperature is 20 DEG C, solubility is only 1.6mol m-3.Therefore, when heavy
Product thing produce a large amount of methane when, its in addition to can be by spreading this conventional route, can also by bubble this special way
Through discharging into air.Methane release approach is different, and caused influence has differences.If methane is discharged with diffusion mode,
Influence is relatively small caused by it, because diffused methane is easily aoxidized during overlying water by methane oxidation
Consumption.Therefore, it is significant that research is made a distinction to diffused and air bubble type methane.
Water body air bubble type methane release flux generally use upside down funnel method determines：Funnel is inverted in underwater, collected
The bubble of deposit release, methane content in gas is collected by analyzing, draws air bubble type methane release flux.Diffused methane is released
Put flux generally use closed chamber method：The casing that a top is hollow and seals is placed in water surface, by timing sampling, is divided
Analysis, methane concentration rate of change in casing is obtained, so as to learn diffused methane release speed.In actual applications, static chamber
Method is easily disturbed by methane bubble, and the entrance of methane bubble causes methane concentration fluctuating change in static chamber, causes diffused first
Alkane measure failure, has a strong impact on power Developments.
Utility model content
Goal of the invention：The utility model purpose is to provide a kind of new dress for determining water body diffused methane release flux
Put, avoid methane bubble from being interfered into static chamber, improve diffused Methane determination success rate.
Technical scheme：To achieve the above object, the technical solution adopted in the utility model is：
A kind of new device for determining water body diffused methane release flux, including static chamber and upside down funnel；It is described fall
The bottom opening for putting funnel is placed in below static chamber, and top methane bubble exit is located above static chamber through static chamber top surface,
Diffused methane air hatch is provided with the top of the static chamber.
Preferably, the upside down funnel open edge and static chamber bottom opening edge vertical range for 2~
4cm。
Preferably, the upside down funnel is completely covered static chamber, funnel opening edge stretch out static chamber bottom margin 2~
5cm。
Preferably, the static chamber is drum, the axis of upside down funnel overlaps with the axis of static chamber.
Preferably, the outside of the static chamber is provided with flotation gear.
Preferably, the inside of the static chamber is provided with fan.
Preferably, the static chamber outer surface is covered with aluminium-foil paper.
Preferably, the upside down funnel bottom is open to be circumferentially uniformly arranged some fixed columns between static chamber.
Beneficial effect：A kind of new device for determining water body diffused methane release flux provided by the utility model, will
Funnel is inverted under static chamber, for collecting methane bubble, avoids it from entering the measure of static chamber interference diffused methane, so as to
Improve diffused Methane determination success rate.
Brief description of the drawings
Fig. 1 is the device cross-sectional view of the utility model embodiment.
Fig. 2 is the device overlooking the structure diagram of the utility model embodiment.
In figure, 1- fans, 2- methane gas bubbles out gas port, 3- diffused methane air hatch, 4- static chambers, 5- levitation devices,
6- upside down funnels.
Fig. 3 is the application schematic diagram of the present embodiment device.
Fig. 4 is that the present embodiment determines diffused methane comparison diagram with conventional apparatus.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and examples.
As shown in Figure 1, 2, it is a kind of disclosed in the utility model embodiment to determine the new of water body diffused methane release flux
Type device, funnel 6 is vertically inverted in the lower section of static chamber 4, the opening of the bottom of upside down funnel 6 is completely covered the bottom of static chamber 4 and opened
Mouthful, 6 open edge of upside down funnel stretches out the bottom margin 2-5cm of static chamber 4, the open edge of upside down funnel 6 and the bottom of static chamber 4
The vertical range at portion opening edge is 2-4cm.Static chamber 4 is drum, the axis of upside down funnel 6 and the axis of static chamber 4
Overlap, the methane gas at the top of upside down funnel 6 bubbles out gas port and is located at the top of static chamber 4, the top of static chamber 4 through the top surface of static chamber 4
Provided with diffused methane air hatch 3.The outside of static chamber 4 is provided with flotation gear 5, and water surface is floated on by foreign object auxiliary.
To avoid direct sunlight, box house heating, the outer surface of static chamber 4 is covered with aluminium-foil paper.It can further be provided with inside static chamber 4 electronic
Fan, to mix box house gas.Upside down funnel 6 take tracheae can be directly welded at static chamber 4 top surface through hole or
Docked by screw thread with the top surface of static chamber 4, and ensure air-tightness, to prevent tipping bucket, the bottom of upside down funnel 6 opening and static chamber
Some fixed columns are circumferentially uniformly arranged between 4.The device of the present embodiment can avoid when determining diffused methane release flux
The interference of methane bubble, improve measure success rate.
Below by simulating in methane bubble interference environment to the measure of water body diffused methane release speed, illustrate this reality
With advantage of the new device compared to conventional apparatus.
As shown in figure 3, the new device of the present embodiment is put in algae water, algae particle breakdown produces diffused methane, will
The aeration head for being connected with methane steel cylinder is placed in water bottom, interval release methane bubble, to simulate the release of methane bubble.Per 5min
Gaseous sample 10ml is gathered from static chamber to be placed in vacuum sample bottle, gathers 20min altogether, and collection front opening stands electronic in case
Fan is to mix gas, after gaseous sample is via gas Chromatographic Determination, calculates concentration of methane gas and advances the speed, obtain diffused
Methane release speed.Using the traditional static case without upside down funnel as control, by requirements above, 20 circulations are determined, obtain 20 groups
Data.When every group of data progress linear fit calculating concentration of methane gas is advanced the speed, if linearly dependent coefficient r2<0.95, survey
Determine result to write off.As a result show, conventional apparatus is larger by methane aeration, and success rate is only 60%, when there is methane gas
When bubble enters device, methane concentration fluctuates larger, r in traditional static case apparatus2Only 0.339；And new device can avoid first
The interference of alkane bubble, measure success rate is up to 95%, even if having the entrance of methane bubble, r2It still can reach 0.999.It is also, new
The success value that type device measurement result determines with tradition is without significant difference.
Embodiment of the present utility model is the foregoing is only, is not limited to the utility model.The utility model
Can there are various suitable changes and change.All made within spirit of the present utility model and principle are any to be changed, is equivalent
Replace, improve etc., it should be included within the scope of protection of the utility model.
Claims (8)
1. a kind of new device for determining water body diffused methane release flux, it is characterised in that including static chamber and be inverted leakage
Bucket；The bottom opening of the upside down funnel is placed in below static chamber, and the methane bubble exit at top is located at through static chamber top surface
Above static chamber, diffused methane air hatch is provided with the top of the static chamber.
A kind of 2. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
The vertical range at the open edge of the upside down funnel and the bottom opening edge of static chamber is 2 ~ 4 cm.
A kind of 3. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
Static chamber is completely covered in the upside down funnel, and funnel opening edge stretches out the cm of static chamber bottom margin 2 ~ 5.
A kind of 4. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
The static chamber is drum, and the axis of upside down funnel overlaps with the axis of static chamber.
A kind of 5. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
The outside of the static chamber is provided with flotation gear.
A kind of 6. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
The inside of the static chamber is provided with fan.
A kind of 7. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
The static chamber outer surface is covered with aluminium-foil paper.
A kind of 8. new device for determining water body diffused methane release flux according to claim 1, it is characterised in that
The upside down funnel bottom is open to be circumferentially uniformly arranged some fixed columns between static chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720446383.4U CN206740711U (en) | 2017-04-26 | 2017-04-26 | A kind of new device for determining water body diffused methane release flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720446383.4U CN206740711U (en) | 2017-04-26 | 2017-04-26 | A kind of new device for determining water body diffused methane release flux |
Publications (1)
| Publication Number | Publication Date |
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| CN206740711U true CN206740711U (en) | 2017-12-12 |
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| CN201720446383.4U Active CN206740711U (en) | 2017-04-26 | 2017-04-26 | A kind of new device for determining water body diffused methane release flux |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064370A (en) * | 2017-04-26 | 2017-08-18 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of new device for determining water body diffused methane release flux |
-
2017
- 2017-04-26 CN CN201720446383.4U patent/CN206740711U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064370A (en) * | 2017-04-26 | 2017-08-18 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of new device for determining water body diffused methane release flux |
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