CN203337538U - Determination device for recycling rate of farmland ammonia volatilization determination method - Google Patents
Determination device for recycling rate of farmland ammonia volatilization determination method Download PDFInfo
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- CN203337538U CN203337538U CN2013203350544U CN201320335054U CN203337538U CN 203337538 U CN203337538 U CN 203337538U CN 2013203350544 U CN2013203350544 U CN 2013203350544U CN 201320335054 U CN201320335054 U CN 201320335054U CN 203337538 U CN203337538 U CN 203337538U
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- volatilization
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Abstract
The utility model provides a determination device for a recycling rate of a farmland ammonia volatilization determination method. The determination device comprises a weighing device, an ammonia supplying device and a dispersion device, wherein the ammonia supplying device is connected with the dispersion device by a nylon hose; the ammonia supplying device comprises a liquid ammonia steel bottle, a decompression valve and a rotor flow meter which are connected in sequence; the dispersion device is a closed-loop pipeline and is provided with a gas inlet; 120-240 dispersion holes with the size of 0.5mm-1mm are drilled in the dispersion device. The determination device is simple and convenient to use and adjust; the difficulty of accuracy evaluation of a farmland ammonia volatilization microclimate determination method is overcome.
Description
Technical field
The utility model belongs to the farmland ammonia volatilization and measures the utility appliance field, is specifically related to a kind of farmland ammonia volatilization assay method determination of recovery rates device.
Background technology
Ammonia is that in atmosphere, content is only second to N
2and N
2the nitrogen-containing compound of O, be also the abundantest alkaline trace gas, and it has a lot of negative effects to the ecosystem and air quality.NH
3, NH
4 +deposition can cause eutrophication, nitrogen leaching loss, soil acidification.NH
3can promote the formation of PM2.5 particle, harm people's respiratory system.Agricultural is the main source of generally acknowledged Ammonia in Atmosphere gas, and its discharge capacity accounts for the 55-56% of global emission intensity, and the farmland ammonia volatilization that particularly nitrogen application produces is the important channel that ammonia enters atmosphere.Owing to limited by technology or method, the mensuration of farmland ammonia volatilization maintains comparatively extensive level always for a long time.Although the most frequently used box method is simple and easy to use, with low cost at present, in case, environment and true environment differ greatly, representative poor; The micrometeorology method is calculated ammonia volatilization by measuring surface layer turbulent flow conditions and ammonia concentration in air, does not disturb the field physical environment, has reflected truly the situation of farmland ammonia volatilization, is widely regarded as the better method of measuring ammonia volatilization.But the micrometeorology method is due to the larger sampling area of needs, and this has limited the test of micrometeorology method accuracy to a great extent.
Open path tunable diode laser absorption spectroscopy technology and reverse Lagrangian Stochastic Diffusion Model are farmland ammonia volatilization microclimate monitoring technology of newly-developed in the world.Chinese patent application 201210184582.4 discloses a kind of farmland ammonia volatilization method of real-time based on the laser absorption spectrum technology, size, the shape of the method to volatile source in ammonia volatilization mensuration, and the not basic restriction in ammonia concentration determination position, it is the ammonia volatilization that the method can be measured the volatile source of arbitrary size and shape, and the ammonia concentration determination position only need get final product at wind direction under volatile source, this gives and measures the method recovery, and assessment the method accuracy and applicability provide may.
The utility model content
The technical matters solved: the utility model provides a kind of farmland ammonia volatilization assay method determination of recovery rates device, with accuracy and the applicability of reverse Lagrangian Stochastic Diffusion Model method in assessment farmland ammonia volatilization microclimate assay method.
Technical scheme: farmland ammonia volatilization assay method determination of recovery rates device, comprise weighing device, ammonia feeding mechanism and disperser, described ammonia feeding mechanism is connected with disperser by nylon hose, described ammonia feeding mechanism comprises liquid ammonia steel bottle, reduction valve and the spinner-type flowmeter be linked in sequence, described disperser is closed circuit pipeline, which is provided with gas feed, and be drilled with the diffusion hole of 120-240 0.5-1mm.
In described liquid ammonia steel bottle, the purity of liquefied ammonia is 99.99%.
Described liquid ammonia steel bottle is located on weighing device.
Described weighing device is electronic scales.
The polypropylene random copolymer pipe that described closed circuit pipeline is internal diameter 18mm, the closed circuit gas distribution system that composition housing size is 6 * 6 meters, be provided with a diffusion hole every 40cm.
The application of farmland ammonia volatilization assay method determination of recovery rates device, open the liquid ammonia steel bottle valve, open liquefied ammonia specialty reduction valve, regulating ammonia by spinner-type flowmeter discharges with constant flow rate, ammonia enters the disperser that is placed in ground, discharge and diffusion with the wind by diffusion hole, measure ammonia volatilization speed by open path tunable diode laser absorption spectroscopy technology and reverse Lagrangian Stochastic Diffusion Model simultaneously; After discharge finishing, by weighing device weighing liquid ammonia steel bottle and liquefied ammonia gross weight, to determine actual ammonia burst size, the ammonia burst size is not less than 0.5kg, the ammonia rate of release Q (gm of determinator
-2s
-1) can be calculated by following formula
wherein: M is the ammonia burst size that electronic scales is measured, g; S is the disperser area, 36m
2; T is the ammonia sustained release time, s; By the ammonia volatilization speed of open path tunable diode laser absorption spectroscopy technology and reverse Lagrangian Stochastic Diffusion Model mensuration and the ammonia rate of release contrast that determinator calculates, by comparing difference of them checking farmland ammonia volatilization assay method.The described ammonia sustained release time is preferably 30-120min.
Beneficial effect: the utility model adopts corrosion resistant polypropylene random copolymer pipe to make disperser, to reduce the corrosion of ammonia to pipeline; With corrosion-resistant nylon hose gas transmission, can reduce the suction-operated of inner-walls of duct to ammonia, thereby reduce error at measurment, and be convenient to the movement of disperser in the wild; Adopt reduction valve and spinner-type flowmeter jointly to regulate the ammonia rate of release, stable to guarantee the ammonia rate of release; Adopt electronic scales accurate quantification liquefied ammonia burst size, high-purity ammonia quantitatively discharges, and provides controllable and measurable ammonia volatile source to detect farmland ammonia volatilization assay method; Equipment is simple, uses easy to adjustly, has solved the difficulty of farmland ammonia volatilization microclimate assay method accuracy evaluation.
The accompanying drawing explanation
Fig. 1 is the application's structural representation;
Fig. 2 is diffusion hole schematic diagram on disperser;
Fig. 3 is under different rate of volatilizations, the ammonia volatilization speed of estimation and actual rate of volatilization comparison diagram.
Embodiment
Following examples further illustrate content of the present utility model, but should not be construed as restriction of the present utility model.In the situation that do not deviate from the utility model spirit and essence, the modification that the utility model method, step or condition are done and replacement, all belong to scope of the present utility model.If do not specialize, the conventional means that in embodiment, technological means used is well known to those skilled in the art.
Device therefor:
Electronic scales: this electronics technology company limited of BWS501-150B Xiamen one hundred human relations;
Liquid ammonia steel bottle: D100 Xinxiang City difficult to understand triumphant steel cylinder company limited;
Liquefied ammonia specialty reduction valve: YQA-441 Shanghai Pressure Reducer Factory Co., Ltd.;
Anticorrosion spinner-type flowmeter: the LZB-10WBF Changzhou becomes rich flow instrument company limited;
Embodiment 1:
As shown in Figure 1, farmland ammonia volatilization assay method determination of recovery rates device comprises liquid ammonia steel bottle 1, liquefied ammonia specialty reduction valve 2, nylon hose 3, anticorrosion spinner-type flowmeter 4, disperser 5 and electronic scales.Described liquid ammonia steel bottle 1 net weight 70kg, maximum filling weight 50kg, the liquefied ammonia that in-built purity is 99.99%, anticorrosion spinner-type flowmeter 4 ranges are 0-45L/min, and the electronic scales range is 0-150kg, and accuracy is 5g, the closed-circuit system of 6 * 6 meters that the polypropylene random copolymer pipe that disperser 5 is internal diameter 18mm (PP-R pipe) hot melt connects, the pipeline total length is 48 meters, bores the diffusion hole 7 of a 0.8mm on it every 40cm, and the quantity of diffusion hole is 120.
Before test, in liquid ammonia steel bottle 1, be full of liquefied ammonia, by electronic scales weighing liquid ammonia steel bottle 1 and liquefied ammonia gross weight, then liquid ammonia steel bottle 1, liquefied ammonia specialty reduction valve 2, spinner-type flowmeter 4, disperser 5 orders closely connected, prevent gas leakage.
During test, open liquid ammonia steel bottle 1 valve, slowly open liquefied ammonia specialty reduction valve 2, regulate ammonia by spinner-type flowmeter 4 and discharge with constant flow rate.For guaranteeing flow speed stability, every 1-2min, regulate once.Ammonia enters the disperser 5 that is placed in ground, by diffusion hole 7, discharges and diffusion with the wind, measures ammonia volatilization speed by open path tunable diode laser absorption spectroscopy technology and reverse Lagrangian Stochastic Diffusion Model simultaneously.The ammonia sustained release time is preferably 30-120min, after discharge finishing, by electronic scales weighing steel cylinder 1 and liquefied ammonia gross weight to determine actual ammonia burst size.In order to guarantee that weighing error is in 1%, the ammonia burst size is greater than 0.5kg.Disperser ammonia rate of release Q (gm
-2s
-1) can be calculated by following formula
wherein: M is the ammonia burst size that electronic scales is measured, g; S is the disperser area, 36m
2; T is the ammonia sustained release time, s.By the ammonia volatilization speed of open path tunable diode laser absorption spectroscopy technology and reverse Lagrangian Stochastic Diffusion Model mensuration and the contrast of actual ammonia rate of release, by comparing difference of them assessment farmland ammonia volatilization assay method.
Embodiment 2:
Install identical with embodiment 1, test in March, 2012 smooth open wheatland outside Agro-ecology testing station, Chinese Academy of Sciences Fengqiu (Fengqiu) carry out, duration Huang-Huai-Hai plain winter wheat period of seedling establishment.The disperser of farmland ammonia volatilization assay method determination of recovery rates device is laid in wheatland, is connected with the ammonia feeding mechanism.When ammonia discharges, in the lower wind direction 10-30m scope of disperser, with open long-optical path diode laser absorption spectrometer, measure Ammonia in Air gas concentration, measure air background ammonia concentration simultaneously at volatile source upwind place.Ammonia concentration based on measuring, by reverse Lagrangian Stochastic Diffusion Model estimation ammonia volatilization speed, the actual ammonia volatilization speed of measuring with electronic scales contrasts.Fig. 3 is under different rate of volatilizations, the ammonia volatilization speed of estimation and actual rate of volatilization comparison diagram, and error line means the standard error of estimation rate of volatilization under different same speed of period.It is comparatively accurate that result shows that open path tunable diode laser absorption spectroscopy technology and reverse Lagrangian Stochastic Diffusion Model are measured ammonia volatilization speed, and standard error, in 10%, can be measured for the farmland ammonia volatilization.
Claims (4)
1. farmland ammonia volatilization assay method determination of recovery rates device, it is characterized in that comprising weighing device (6), ammonia feeding mechanism and disperser (5), described ammonia feeding mechanism is connected with disperser (5) by nylon hose (3), described ammonia feeding mechanism (1) comprises liquid ammonia steel bottle (1), reduction valve (2) and the spinner-type flowmeter (4) be linked in sequence, described disperser (5) is closed circuit pipeline, which is provided with gas feed, and be drilled with the diffusion hole (7) of 120-240 0.5-1mm.
2. farmland ammonia volatilization assay method determination of recovery rates device according to claim 1, is characterized in that described liquid ammonia steel bottle is located on weighing device.
3. farmland ammonia volatilization assay method determination of recovery rates device according to claim 1, is characterized in that described weighing device is electronic scales.
4. farmland ammonia volatilization assay method determination of recovery rates device according to claim 1, it is characterized in that the polypropylene random copolymer pipe that described closed circuit pipeline is internal diameter 18mm, form the closed circuit gas distribution system of 6 * 6 meters of housing sizes, every 40cm, be provided with a diffusion hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203350544U CN203337538U (en) | 2013-06-09 | 2013-06-09 | Determination device for recycling rate of farmland ammonia volatilization determination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203350544U CN203337538U (en) | 2013-06-09 | 2013-06-09 | Determination device for recycling rate of farmland ammonia volatilization determination method |
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| Publication Number | Publication Date |
|---|---|
| CN203337538U true CN203337538U (en) | 2013-12-11 |
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ID=49706207
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203350544U Expired - Fee Related CN203337538U (en) | 2013-06-09 | 2013-06-09 | Determination device for recycling rate of farmland ammonia volatilization determination method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203337538U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323414A (en) * | 2013-06-09 | 2013-09-25 | 中国科学院南京土壤研究所 | Recovery rate measuring device in farmland ammonia volatilization measuring method and application |
| CN110320326A (en) * | 2019-05-31 | 2019-10-11 | 吉林省农业科学院 | The measuring method of gas reclaiming rate in respiratory metabolism cabin |
-
2013
- 2013-06-09 CN CN2013203350544U patent/CN203337538U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323414A (en) * | 2013-06-09 | 2013-09-25 | 中国科学院南京土壤研究所 | Recovery rate measuring device in farmland ammonia volatilization measuring method and application |
| CN110320326A (en) * | 2019-05-31 | 2019-10-11 | 吉林省农业科学院 | The measuring method of gas reclaiming rate in respiratory metabolism cabin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20140609 |