CN205449211U - Biogas engineering gas production test system - Google Patents
Biogas engineering gas production test system Download PDFInfo
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- CN205449211U CN205449211U CN201620253965.6U CN201620253965U CN205449211U CN 205449211 U CN205449211 U CN 205449211U CN 201620253965 U CN201620253965 U CN 201620253965U CN 205449211 U CN205449211 U CN 205449211U
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- biogas
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Abstract
The utility model belongs to biogas engineering gas production test system in the energy field comprises accurate flowmeter 3 and software bag 4, and 3 one end in the accurate flowmeter go up original measurement interface with gas transmission pipeline 2 to be connected, and the other end passes through valve 7 and is connected with software bag 4. The utility model overcomes current biogas engineering gas production test system accuracy is not enough, and the suitability is wideless, and the measured value of gas production does not possess the defect of horizontal comparativity, and the biogas engineering gas production test system device that provides is simple, the simple operation, and measuring result is reliable and stable, possesses horizontal comparativity.
Description
Technical field:
This utility model belongs to energy field, is specifically related to a kind of biogas engineering gas production test system.
Background technology:
The gas production measuring biogas engineering a period of time is to detect this biogas engineering design level and the important parameter of construction quality.For operating biogas engineering, measure its gas production and should use lossless detection method, it is ensured that before and after measurement, biogas engineering all can be properly functioning.The measuring method of existing biogas engineering gas production has two kinds, and a kind of mode is existing flow meter on utilizing works air delivering pipeline, records the gas production of 24 hours；Another kind of method is to utilize the fluid seal gas holder of biogas engineering, measures gas storage holder and floats the cross-sectional area of cover, the height risen by cover floating in record certain time, the size of conversion gas production.The former can not meet flow measurement needs because of calibrating state and the degree of accuracy of existing flow meter, causes data accuracy to become to doubt；The latter requires that detected biogas engineering must build fluid seal gas holder, and floating cover highly also needs to be easy to measure, if engineering uses bimodulus gas holder or cylinder of steel gas holder, then cannot use the method.Particularly both of which does not record environmental condition at that time, and gas production is not scaled under standard state yet, causes the measured value of gas production not possess horizontal comparability.
Summary of the invention:
The purpose of this utility model is to overcome existing biogas engineering gas production measuring method degree of accuracy inadequate, the suitability is the widest, the measured value of gas production does not possess the defect of horizontal comparability, there is provided a kind of measurement apparatus simple for people, simple operation, measurement result is reliable and stable, possesses the biogas engineering gas production test system of horizontal comparability.
The purpose of this utility model is realized by following technical proposals.
Biogas engineering gas production of the present utility model test system, it is characterised in that being made up of delicate flow meter 3 and soft bag 4, delicate flow meter 3 one end measurement interface original with on gas pipeline 2 is connected, and the other end is connected with soft bag 4 by valve 7.
In such scheme, described delicate flow meter 3 is the delicate flow meter that can measure gas flow, gas pressure and gas temperature.
Using method of the present utility model is:
First closing valve 5 and the valve 6 at original measurement interface two ends on gas pipeline 2, close valve 7, be connected by original with on gas pipeline 2 for delicate flow meter 3 one end measurement interface, the other end is connected with soft bag 4 by valve 7；
Open valve 5, after delicate flow meter 3 is stable, reads atmospheric pressure P0, biogas pressure P1, temperature T1With flow number of degrees Q；
After biogas engineering aerogenesis to the scheduled time, read atmospheric pressure P on delicate flow meter 30 /, biogas pressure P2With temperature T2；
Open valve 7, allow biogas enter soft bag 4 through delicate flow meter 3, after system stability, read biogas pressure P3, temperature T3With flow number of degrees Q/；
It is calculated as follows the molal quantity of the produced biogas of biogas engineering:
Molal quantity by produced biogasIt is converted into the volume under standard state.
This utility model, by original detection hole connecting test system on gas pipeline, does not carries out holing and repairing work on appendix, does not affect engineering original structure.Utilize testing agency to have equipment by oneself, use the high precision flow through calibrating and same test system, it is ensured that the tractability of data and horizontal comparability.Gas production is converted to standard state, it is ensured that measurement data is not affected by diverse geographic location and external condition.This utility model has reached lossless, portable, accurate and that repeatability is high purpose, can check and accept for biogas engineering and technique odds relatively provides important reference and foundation, promote further biogas engineering design level and the raising of construction quality, ensured the continuing of biogas engineering, effectively run.
In sum, it is inadequate that this utility model overcomes existing biogas engineering gas production test system accuracies, the suitability is the widest, the measured value of gas production does not possess the defect of horizontal comparability, the biogas engineering gas production testing system device provided is simple, simple operation, measurement result is reliable and stable, possesses horizontal comparability.
Accompanying drawing illustrates:
Fig. 1 is pipeline schematic diagram of the present utility model.
In figure: 1: fermentation tank；2: gas pipeline；3. delicate flow meter；4. soft bag；5. valve；6. valve；7. valve.
Detailed description of the invention
It is described in further detail this utility model below by embodiment, but this utility model is not limited only to described embodiment.
Embodiment one
The biogas engineering gas production test system of this example is made up of delicate flow meter 3 and soft bag 4, and delicate flow meter 3 one end measurement interface original with on gas pipeline 2 is connected, and the other end is connected with soft bag 4 by valve 7.
Delicate flow meter 3 is the delicate flow meter that can measure gas flow, gas pressure and gas temperature.
The using method of this biogas engineering gas production test system is:
First closing valve 5 and the valve 6 at original measurement interface two ends on gas pipeline 2, close valve 7, be connected by original with on gas pipeline 2 for delicate flow meter 3 one end measurement interface, the other end is connected with soft bag 4 by valve 7；
Open valve 5, after delicate flow meter 3 is stable, reads atmospheric pressure P0, biogas pressure P1, temperature T1With flow number of degrees Q；
After biogas engineering aerogenesis to the scheduled time, read atmospheric pressure P on delicate flow meter 30 /, biogas pressure P2With temperature T2；
Open valve 7, allow biogas enter soft bag 4 through delicate flow meter 3, after system stability, read biogas pressure P3, temperature T3With flow number of degrees Q/；
It is calculated as follows the molal quantity of the produced biogas of biogas engineering:
Molal quantity by produced biogasIt is converted into the volume under standard state.
Below as a example by six hours gas production, it is described in further detail the derivation step about computing formula.
One, principle
As the molal quantity of six hours (6h) biogas that produces of biogas engineering need to be measured, the valve 6 on gas pipeline 2 can be closed, in 6h, produce the molal quantity of biogas.According to The Ideal-Gas Equation PV=nRT, wherein, R is constant 8.31, PBefore 6h、TBefore 6h、PAfter 6h、TAfter 6hDirectly can be measured by instrument, before and after 6h, the air chamber of fermentation tank 1 and the volume of gas pipeline 2 also will not change, i.e. VBefore 6h=VAfter 6h=V, but V by instrument or simply be calculated, therefore cannot need to introduce test system-computed V, and then produce the molal quantity of biogas in just calculating six hours.
After closing valve 6, gas pressure, gas temperature and the gas volume of entrance soft bag 4 before and after the valve 7 before soft bag 4 be measured by delicate flow meter 3 is opened can be passed through.After opening valve 7, the pressure in soft bag 4 and the pressure in gas pipeline 2 the most just reach balance, and the methane quantity during this period of time produced is negligible.According to The Ideal-Gas Equation PV=nRT, can obtain opening two equations before and after valve 7, the two equation is contained two unknown number V and n, can be calculated the volume V of fermentation tank 1 air chamber and gas pipeline 2 by the two equation.Producing the molal quantity of biogas in calculating six hours again, the most again the biogas of this molal quantity is converted into standard state lower volume, this is six hours interior gas production of this biogas engineering.
Two, test procedure
The first step: close valve 5, valve 6 and valve 7, mounting test system；
Second step: open valve 5, reads atmospheric pressure P after delicate flow meter 3 data stabilization0, biogas pressure P1, gas temperature T1With flow number of degrees Q, if now biogas molal quantity is n in fermentation tank 1 and gas pipeline 21, by PV=nRT, obtain formula (1): (P0+P1) V=n1RT1；
3rd step: after aerogenesis six hours, this time is because having biogas to produce in fermentation tank 1, but the valve 6 of output channel 2 is closed mode, and in fermentation tank 1 and gas pipeline 2, pressure can rise, and now reads atmospheric pressure P on delicate flow meter 30 /, biogas pressure P2With gas temperature T2If now in fermentation tank 1 and gas pipeline 2, biogas molal quantity is n2, by PV=nRT, obtain formula (2): (P0 /+P2) V=n2RT2；
4th step: open valve 7, allows biogas enter soft bag 4 through delicate flow meter 3, and now, because there being biogas to pass through, pressure that delicate flow meter 3 enters in soft bag 4, fermentation tank 1 and gas pipeline 2 can decline, and after system stability, reads biogas pressure P3, gas temperature T3With flow number of degrees Q/, by PV=nRT, obtain formula (3): (P0 /+P3) (V+Q/-Q)=n2RT3；
Three, derivation is calculated
(1) fermentation tank 1 air chamber and the calculating of gas pipeline 2 volume V:
By formula (2)/formula (3):
Formula (4):
V=T2(P0 /+P3) (Q/-Q)/[T3(P0 /+P2)-T2(P0 /+P3)]；
(2) calculating of biogas engineering product biogas molal quantity Δ n:
Formula (5): n is obtained by formula (1)1=(P0+P1) V/RT1；
Formula (6): n is obtained by formula (2)2=(P0 /+P2) V/RT2；
According to formula (5) and formula (6), obtain formula (7):
Formula (4) is substituted into formula (7), obtains formula (8):
(3) biogas engineering is produced biogas molal quantity Δ n and is converted into volume delta V under standard state:
Generally gas production typically represents by standard state lower volume, so needing to be converted into the gas of this molal quantity volume delta V in normal conditions by producing biogas molal quantity Δ n.
By P Δ V=Δ nRT, obtain formula (9):
ΔV=ΔnRT/P；
Under standard state, pressure P is 101325Pa, and under standard state, temperature T is 273.15 DEG C, and formula (8) is substituted into formula (9):
。
Claims (2)
1. a biogas engineering gas production test system, it is characterized in that being made up of delicate flow meter (3) and soft bag (4), delicate flow meter (3) one end original measurement interface upper with gas pipeline (2) is connected, and the other end is connected with soft bag (4) by valve (7).
Biogas engineering gas production test system the most according to claim 1, it is characterised in that described delicate flow meter (3) is the delicate flow meter that can measure gas flow, gas pressure and gas temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620253965.6U CN205449211U (en) | 2016-03-30 | 2016-03-30 | Biogas engineering gas production test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620253965.6U CN205449211U (en) | 2016-03-30 | 2016-03-30 | Biogas engineering gas production test system |
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| CN205449211U true CN205449211U (en) | 2016-08-10 |
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| CN201620253965.6U Expired - Fee Related CN205449211U (en) | 2016-03-30 | 2016-03-30 | Biogas engineering gas production test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716682A (en) * | 2016-03-30 | 2016-06-29 | 农业部沼气科学研究所 | Gas production rate testing system for methane project |
-
2016
- 2016-03-30 CN CN201620253965.6U patent/CN205449211U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716682A (en) * | 2016-03-30 | 2016-06-29 | 农业部沼气科学研究所 | Gas production rate testing system for methane project |
| CN105716682B (en) * | 2016-03-30 | 2020-05-12 | 农业部沼气科学研究所 | Biogas engineering gas production rate test system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20170330 |