CN104483079A - Biogas tank airtightness testing device - Google Patents
Biogas tank airtightness testing device Download PDFInfo
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- CN104483079A CN104483079A CN201410704644.9A CN201410704644A CN104483079A CN 104483079 A CN104483079 A CN 104483079A CN 201410704644 A CN201410704644 A CN 201410704644A CN 104483079 A CN104483079 A CN 104483079A
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- methane
- generating pit
- gas
- air chamber
- pressurize
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Abstract
The invention provides a biogas tank airtightness testing device, belonging to the field of testing devices. The biogas tank airtightness testing device is composed of a biogas tank (1), a pressure gauge (4), a surface thermometer (5) and a liquid level sensor (6), wherein the pressure gauge (4) is connected with a gas guide pipe (2) of the biogas tank (1); a thermocouple lead wire of the surface thermometer (5) is partially stuck to the inner part of the top of a gas chamber (3) of the biogas tank (1); a probe end of the liquid level sensor (6) is arranged at the bottommost part of the biogas tank (1). The technical difficulty that an existing gas chamber is a spherical segment hard body commercialized biogas tank airtightness testing device, and hardly guarantees the accuracy of testing data is solved, and the biogas tank airtightness testing device provided for people has the advantages of simple structure, strong operability and high testing precision.
Description
Technical field
The invention belongs to proving installation field, be specifically related to a kind of methane-generating pit tightness measuring device.
Background technology
At present, hardware commercialized biogas digester comprises biomass pool built from glass fiber reinforced plastic, duroplastic biogas generating pit, refinforced cement commercialized biogas digester and steel commercialized biogas digester, and the plenum section of most hardware commercialized biogas digester is segment.And for the many foundations of test of such commercialized biogas digester sealing or with reference to NY/T 1699-2010 " glass fiber reinforced plastics domestic methane tank " standard detection and judgement.Air chamber pressure change is only measured in the sealing test method of this standard, in this, as the basis for estimation whether air chamber leaks gas, and in practical operation, before and after pressurize 24h, atmospheric pressure, environment temperature all there occurs change, chamber volume also there occurs change with pressure and temperature simultaneously, therefore only too extensive as the basis for estimation of whether leaking gas using pressure, be difficult to warranty test data accuracy.
Summary of the invention
The object of the invention is to solve existing air chamber is the technical barrier that segment hardware commercialized biogas digester tightness measuring device is difficult to warranty test data accuracy, for people provide a kind of structure simple, the methane-generating pit tightness measuring device that workable and test accuracy is high.
The object of the invention is to be realized by following proposal.
Methane-generating pit tightness measuring device of the present invention, it is characterized in that described methane-generating pit tightness measuring device is made up of methane-generating pit, tensimeter, land surface pyrometer and liquid level sensor, wherein, tensimeter is connected with the wireway of methane-generating pit, the thermocouple wire bonding partially of land surface pyrometer is to the inside on gas chamber of marsh gas tank top, and the sound end of liquid level sensor is placed on methane-generating pit bottommost.
The using method of methane-generating pit tightness measuring device of the present invention is as follows:
The first step, measures methane-generating pit physical dimension, calculates the maximum volume of air chamber;
Second step, fixing methane-generating pit, tensimeter is connected with the wireway of methane-generating pit, and the thermocouple wire bonding partially of land surface pyrometer is to the inside on gas chamber of marsh gas tank top, and the sound end of liquid level sensor is placed on methane-generating pit bottommost;
3rd step, to methane-generating pit injected clear water, stops water filling until pressure gauge reading slightly larger than during 8kPa, records the gas temperature of now atmospheric pressure and air chamber, according to number of moles of gas in air chamber before the Ideal-Gas Equation calculating pressurize;
4th step, pressurize is after 24 hours, the gas temperature of record atmospheric pressure and air chamber, the reading of recording manometer and liquid level sensor, according to the reading of level sensor and the volume of methane-generating pit physical dimension calculating air chamber gas, calculate number of moles of gas in pressurize rear gas chamber according to the Ideal-Gas Equation;
5th step, when the difference of number of moles of gas in number of moles of gas in air chamber before pressurize and pressurize rear gas chamber to be less than before pressurize 3% of number of moles of gas in air chamber, judges that methane-generating pit sealing is qualified, otherwise then defective.
The present invention utilizes the basis for estimation that in gas chamber of marsh gas tank, whether the change of number of moles of gas before and after pressurize leaks gas as air chamber, utilize compared with air chamber pressure changes with existing test method, present invention greatly enhances the accuracy of impermeability test result, and easy to operate structure is simple.
In sum, the invention solves existing air chamber is the technical barrier that segment hardware commercialized biogas digester tightness measuring device is difficult to warranty test data accuracy, the methane-generating pit tightness measuring device structure provided for people is simple, workable and test accuracy is high.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
In figure: 1. methane-generating pit; 2. wireway; 3. air chamber; 4. tensimeter; 5. land surface pyrometer; 6. liquid level sensor.
Embodiment
The invention is further illustrated by the following examples, and the present invention is not limited only to described embodiment.
Embodiment one
The methane-generating pit tightness measuring device of this example as shown in Figure 1, methane-generating pit tightness measuring device is made up of methane-generating pit 1, tensimeter 4, land surface pyrometer 5 and liquid level sensor 6, wherein, tensimeter 4 is connected with the wireway 2 of methane-generating pit 1, the inside that the thermocouple wire bonding partially of land surface pyrometer 5 pushes up to methane-generating pit 1 air chamber 3, the sound end of liquid level sensor 6 is placed on methane-generating pit 1 bottommost.
The using method of the methane-generating pit tightness measuring device of this example is as follows:
The first step, measures methane-generating pit 1 physical dimension, calculates the maximum volume of air chamber 3, measures and obtains air chamber 3 maximum height H
1, air chamber 3 bottom surface internal diameter r
1be filled with water height H maximum with second pond
2, air chamber 3 can think the segment that a whole ball intercepts, the internal diameter r of ball
2computing formula be: r
2=(H
1 2+ r
1 2)/2H
1, the computing formula of air chamber 3 maximum volume V is: V=π H
1 2(r
2-H
1/ 3).
Second step, fixing methane-generating pit 1, guarantee that flange is in horizontality, tensimeter 4 is connected with the wireway 2 of methane-generating pit 1, the inside that the thermocouple wire bonding partially of land surface pyrometer 5 pushes up to methane-generating pit 1 air chamber 3, the side of wireway 2, guarantee thermopair energy Measurement accuracy air chamber 3 gas temperature, the sound end of liquid level sensor 6 is placed on methane-generating pit 1 bottommost.
3rd step, from discharge room to methane-generating pit 1 injected clear water, stops water filling until tensimeter 4 reading slightly larger than during 8kPa, records now atmospheric pressure P after the water surface no longer fluctuates
0with the gas temperature t of air chamber 3
1, according to number of moles of gas in air chamber 3 before the Ideal-Gas Equation calculating pressurize, number of moles of gas n in air chamber 3 before pressurize
1computing formula be: n
1=P
0v/(Rt
1), in formula, R is gas law constant, and its value is 8.314 J/molk.
4th step, pressurize, after 24 hours, records atmospheric pressure P
0' and the gas temperature t of air chamber 3
2the reading P of the recording manometer 4 and reading h of liquid level sensor 6, according to the reading h of level sensor 6 and the volume of methane-generating pit 1 physical dimension calculating air chamber 3 gas, calculate number of moles of gas in pressurize rear gas chamber 3 according to the Ideal-Gas Equation, now in air chamber 3, the computing formula of liquid level distance top height H is: H=H
1+ H
2-h+P/ ρ g, in formula, ρ is water-mass density, and its value is 1000kg/m
3, g value is 9.8N/kg, and now the computing formula of air chamber 3 volume is, V '=π h
2(r
2-H/3), now number of moles of gas n in air chamber 3
2computing formula be: n
2=(P+P
0') V '/(Rt
2).
5th step, when the difference of number of moles of gas in number of moles of gas in air chamber before pressurize 3 and pressurize rear gas chamber 3 to be less than before pressurize 3% of number of moles of gas in air chamber 3, judge that methane-generating pit 1 sealing is qualified, on the contrary then defective, and in air chamber 3, the computing formula of the leakage rate η of gas is: η=(n
1-n
2)/n
1100%.
Claims (2)
1. a methane-generating pit tightness measuring device, it is characterized in that described methane-generating pit tightness measuring device is made up of methane-generating pit (1), tensimeter (4), land surface pyrometer (5) and liquid level sensor (6), wherein, tensimeter (4) is connected with the wireway (2) of methane-generating pit (1), the inside that the thermocouple wire bonding partially of land surface pyrometer (5) pushes up to methane-generating pit (1) air chamber (3), the sound end of liquid level sensor (6) is placed on methane-generating pit (1) bottommost.
2. methane-generating pit tightness measuring device according to claim 1, is characterized in that the using method of described methane-generating pit tightness measuring device is as follows:
The first step, measures methane-generating pit (1) physical dimension, calculates the maximum volume of air chamber (3);
Second step, fixing methane-generating pit (1), tensimeter (4) is connected with the wireway (2) of methane-generating pit (1), the inside that the thermocouple wire bonding partially of land surface pyrometer (5) pushes up to methane-generating pit (1) air chamber (3), and the sound end of liquid level sensor (6) is placed on methane-generating pit (1) bottommost;
3rd step, to methane-generating pit (1) injected clear water, stops water filling until tensimeter (4) reading slightly larger than during 8kPa, records the gas temperature of now atmospheric pressure and air chamber (3), according to air chamber (3) interior number of moles of gas before the Ideal-Gas Equation calculating pressurize;
4th step, pressurize is after 24 hours, the gas temperature of record atmospheric pressure and air chamber (3), the reading of recording manometer (4) and liquid level sensor (6), according to the reading of level sensor (6) and the volume of methane-generating pit (1) physical dimension calculating air chamber (3) gas, calculate pressurize rear gas chamber (3) interior number of moles of gas according to the Ideal-Gas Equation;
5th step, when the difference of number of moles of gas in number of moles of gas in air chamber before pressurize (3) and pressurize rear gas chamber (3) to be less than before pressurize 3% of number of moles of gas in air chamber (3), judges that methane-generating pit (1) sealing is qualified, otherwise then defective.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704644.9A CN104483079B (en) | 2014-11-29 | 2014-11-29 | Methane-generating pit method for testing tightness |
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|---|---|---|---|
| CN201410704644.9A CN104483079B (en) | 2014-11-29 | 2014-11-29 | Methane-generating pit method for testing tightness |
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| CN104483079A true CN104483079A (en) | 2015-04-01 |
| CN104483079B CN104483079B (en) | 2017-07-28 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819812A (en) * | 2015-04-03 | 2015-08-05 | 广西威尔森环保科技开发有限公司 | Glass fiber reinforced plastic septic tank airtightness detection method |
| CN108871675A (en) * | 2018-04-16 | 2018-11-23 | 广东小天才科技有限公司 | Detect method, apparatus, waterproof electronic product and the storage medium of waterproof performance |
| CN113758658A (en) * | 2021-10-11 | 2021-12-07 | 中国商用飞机有限责任公司 | Airplane pipeline airtightness test device and method |
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| CN2826391Y (en) * | 2005-09-27 | 2006-10-11 | 云南师范大学 | Gas tightness detecting device for GRP methane tank component |
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2014
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Patent Citations (5)
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| 张万俊等: "《中华人民共和国国家标准》", 31 October 2002 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819812A (en) * | 2015-04-03 | 2015-08-05 | 广西威尔森环保科技开发有限公司 | Glass fiber reinforced plastic septic tank airtightness detection method |
| CN104819812B (en) * | 2015-04-03 | 2017-03-22 | 广西威尔森环保科技开发有限公司 | Glass fiber reinforced plastic septic tank airtightness detection method |
| CN108871675A (en) * | 2018-04-16 | 2018-11-23 | 广东小天才科技有限公司 | Detect method, apparatus, waterproof electronic product and the storage medium of waterproof performance |
| CN113758658A (en) * | 2021-10-11 | 2021-12-07 | 中国商用飞机有限责任公司 | Airplane pipeline airtightness test device and method |
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| Publication number | Publication date |
|---|---|
| CN104483079B (en) | 2017-07-28 |
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Granted publication date: 20170728 Termination date: 20171129 |