CN202676691U - Portable dissolved methane content detection device - Google Patents
Portable dissolved methane content detection device Download PDFInfo
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- CN202676691U CN202676691U CN 201220272651 CN201220272651U CN202676691U CN 202676691 U CN202676691 U CN 202676691U CN 201220272651 CN201220272651 CN 201220272651 CN 201220272651 U CN201220272651 U CN 201220272651U CN 202676691 U CN202676691 U CN 202676691U
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Abstract
The utility model discloses a portable dissolved methane content detection device. The portable dissolved methane content detection device comprises a sampling unit, a vaporizing unit, a pressure regulating unit and a detection unit which are sequentially connected and are respectively connected with a control unit and controlled by the control unit. The portable dissolved methane content detection device has the advantages of small size, convenience in carrying, and high accuracy and sampling efficiency.
Description
Technical field
The utility model relates to a kind of gas-detecting device, specifically, relates to a kind of pick-up unit of portable dissolved methane content.
Background technology
Methane is the gas of colourless, tasteless, flammable and little poison, and distributed in nature is very wide, is the chief component of rock gas, coal mine gallery gas, Oilfield gas, also is the principal ingredient of the seabed combustible ice of one of following clean energy resource.In today of energy scarcity, particularly important as the methane resource prospecting of strategic reserve.And methane is 21 times of carbon dioxide in infrared ray field sunshine absorptivity, is another important topic of environment measuring as long-term, stable, the lasting detection of holding the methane content of depositing in the lung-ocean of the earth.
Now, the method for detection methane has direct Detection Method, laser differential method, satellite range detection method, ultrasonic bubble probe method etc. in water.It is aboard ship or in the laboratory to analyze from the seawater sampling that direct method detects again, and this method of testing advantage is that precision is high, but every collection a bit will take a sample, and does not have the secondary pollution that occurs in portability and sampling and the transportation, and analysis is brought error.The laser differential method is to utilize methane that the characteristic of absorption spectrum is arranged in the infrared wavelength section, utilize the infrared laser irradiation of a certain wavelength period, then collect and absorb light intensity, carry out a kind of means of concentration analysis, noncontact, easy, can shine upon the advantages such as picture in the hundreds of rice scope, but its measuring accuracy is not high yet.Utilize the satellite means to detect methane concentration on a large scale, and can't be quantitative analyze.The ultrasonic bubble probe method, although convenient, not high to the selectivity of methane, analytical gas composition and concentration that can't be quantitative.
The each have their own relative merits of said method, should possess as the quantitative analysis tools of water quality and oil and gas exploration has very high selectivity and accuracy of detection to measurand, traditional direct Detection Method has above-mentioned advantage, but it does not have function portable and in real time grab sampling detection.
For these reasons, how to research and develop and a kind ofly be easy and can to the analysis tool of seawater quantitative test methane content, be the technical matters that the utility model mainly solves.
Summary of the invention
The utility model is in order to solve detection inconvenience or the not high problem of precision of existing dissolved methane content, a kind of pick-up unit of portable dissolved methane content is provided, and volume is little, and is easy to carry, can carry and sample in the under water enterprising entry of robot and detect, precision is high.
In order to solve the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of pick-up unit of portable dissolved methane content comprises the sampling unit, vaporization unit, pressure regulating unit and the detecting unit that connect successively, and each unit is connected with control module respectively, accepts the control of control module.
Further, described sampling unit comprises screen pack, the first connecting pipe, is used for connecting the valve of vaporization unit and is used for driving the stepper motor that described valve rotates, described screen pack and valve are separately positioned on the two ends of the first connecting pipe, and described stepper motor is connected with control module.
Further again, described valve is with the sampling groove, and described valve winds the axial-rotation perpendicular to the first connecting pipe under stepper motor drives, when groove alignment the first connecting pipe, the seawater that filters through screen pack enters the sampling groove, under the drive of stepper motor, valve can carry out 180 ° of rotations, seawater in the sampling groove is sent to vaporization unit, the another one advantage of sampling groove is to get the quantitative seawater identical with the groove volume, has avoided using the bad control inflow of common electric control valve.
Further, described vaporization unit comprises vaporizer and is arranged on electric heating sheets in the described vaporizer, and the seawater that enters vaporization unit is vaporized under the heating of electric heating sheets and become gas, and described valve is communicated with vaporizer by the second connecting pipe.
Preferably, in order to improve the efficiency of heating surface, reduce heat dissipation capacity, the described vaporizer outside also is enclosed with thermofin, and described thermofin is comprised of heat-barrier material.
Further again, described pressure regulating unit comprises subsidy gas storehouse and the accent air compression cabin that is communicated with described vaporizer by the 3rd connecting pipe, described subsidy gas storehouse is connected with aspiration pump with transferring air compression cabin by one-way cock respectively, described aspiration pump is connected with control module, the air that aspiration pump will be subsidized in the gas storehouse is bled to transferring in the air compression cabin, controls and transfers the air pressure of air compression cabin inside to be in and can to survey in the scope.
Further, described detecting unit comprises the sensing chamber that is communicated with described accent air compression cabin and the methane detector that is arranged in the described sensing chamber, described methane detector is connected with control module, described sensing chamber one end also is provided with exhausr port, described methane detector is for detection of the content of methane in the gas, and will detect data and be sent to control module.
In order to filter out the water vapor in the gas to be measured, between described accent air compression cabin and sensing chamber, be provided with gas separation membrane, gas to be measured carries out the abundant separation of moisture by described gas separation membrane.
Preferably, described control module is MCU.
Compared with prior art, advantage of the present utility model and good effect are: the pick-up unit of portable dissolved methane content of the present utility model, volume is little, easy to carry, can carry and carry out seawater sampling in the under water enterprising entry of robot and detect the methane concentration that dissolves in the sample water, also can use when hydrocarbon resources is reconnoitred at the deep-sea, this device has simple to operate, precision is high, the advantage that sampling efficiency is high.
After reading by reference to the accompanying drawings the detailed description of the utility model embodiment, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is a kind of example structure block scheme of pick-up unit of the portable dissolved methane content that proposes of the utility model;
Fig. 2 is the workflow diagram of the pick-up unit of portable dissolved methane content among Fig. 1;
Fig. 3 is the structural representation of the pick-up unit of portable dissolved methane content among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in more detail.
Embodiment one, referring to Fig. 1, shown in Figure 2, the pick-up unit of the portable dissolved methane content of the present embodiment comprises the sampling unit, vaporization unit, pressure regulating unit and the detecting unit that connect successively, each unit is connected with control module respectively, accepts the control of control module.Wherein, described sampling unit is used for seawater is sampled, and sample is sent into vaporization unit vaporize, be dissolved in the gas molecule vaporizations such as methane in the water, oxygen, carbon dioxide, and the inorganicss such as salt remain in the vaporizer, the gas after the vaporization enters pressure regulating unit, air pressure by this inside, unit of pressure regulation, it is in surveys in the scope, then by detecting unit the methane content in the gas is detected, and the result is delivered to control module calculating.
As a specific embodiment, referring to shown in Figure 3, sampling unit in the present embodiment comprises screen pack 101, the first connecting pipe 103, be used for connecting the valve 102 of vaporization unit, with the stepper motor (Fig. 3 does not show) that is used for driving described valve 102 rotations, described screen pack 101 and valve 102 are separately positioned on the two ends of the first connecting pipe 103, described stepper motor is connected with control module, described screen pack 101 is in the import of water sample, formed by cancellated material, the impurity that is used for filtered water, guarantee the cleanliness of sample, stepper motor is accepted the control of control module, and then band movable valve 102 rotates a certain amount of water sample of sampling acquisition.Described control module can adopt MCU to realize.
For the ease of calculating methane content, the sample size of taking a sample will be controlled accurately, described valve 102 is preferably with sampling groove 104, and described valve 102 winds the axial-rotation perpendicular to the first connecting pipe 103 under stepper motor drives, when groove alignment the first connecting pipe, the water that filters through screen pack 101 enters sampling groove 104, under the drive of stepper motor, valve 102 can carry out 180 ° of rotations, water in the sampling groove 104 is sent to vaporization unit, the sampling groove 104 can get the quantitative seawater identical with the groove volume, avoided using the problem of the bad control inflow of common electric control valve.
Vaporization unit in the present embodiment comprises vaporizer 201 and the electric heating sheets 202 that is arranged in the described vaporizer 201, the water that enters vaporization unit is vaporized under the heating of electric heating sheets 202 and is become gas, described valve 102 is communicated with vaporizer 201 by the second connecting pipe 105, after 104 water intakings of sampling groove, under the drive of stepper motor, valve 102 carries out 180 ° of rotations, and the water in the groove 104 of taking a sample accordingly is fed in the vaporizer 201 by the second connecting pipe 105.In order to improve the efficiency of heating surface, reduce heat dissipation capacity, described vaporizer 201 outsides also are enclosed with thermofin 203, and described thermofin 203 is comprised of heat-barrier material.
Pressure regulating unit in the present embodiment comprises subsidy gas storehouse 302 and transfers air compression cabin 301, transfer air compression cabin 301 to be communicated with described vaporizer 201 by the 3rd connecting pipe 204, are connected with aspiration pump with accent air compression cabin 301 by one-way cock 303 respectively and are connected in described subsidy gas storehouse 302, described aspiration pump 304 is connected with control module, accept the control of control module, aspiration pump 304 will be subsidized the air in 302 li in gas storehouse and be bled to 301 li of accent air compression cabins, and then realize that the air pressure of control accent air compression cabin 301 inside is in and can surveys in the scope.
Detecting unit in the present embodiment comprises the sensing chamber 401 that is communicated with described accent air compression cabin 301 and the methane detector 402 that is arranged in the described sensing chamber 401, described methane detector 402 is connected with control module, described sensing chamber 401 1 ends also are provided with exhausr port 403, described methane detector 402 is for detection of the content of methane in the gas, preferably detect by the Non-Dispersive Infra-red (NDIR) collimation method, and will detect data and be sent to control module, detect complete after, gas is discharged by exhausr port 403.In order to filter out the water vapor in the gas to be measured, between described accent air compression cabin 301 and sensing chamber 401, be provided with gas separation membrane 305, gas to be measured carries out the abundant separation of moisture by described gas separation membrane 305, and is dry to guarantee gas to be detected.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection domain of the present utility model.
Claims (9)
1. the pick-up unit of a portable dissolved methane content is characterized in that: comprise the sampling unit, vaporization unit, pressure regulating unit and the detecting unit that connect successively, each unit is connected with control module respectively, accepts the control of control module.
2. the pick-up unit of portable dissolved methane content according to claim 1, it is characterized in that: described sampling unit comprises screen pack, the first connecting pipe, is used for connecting the valve of vaporization unit and is used for driving the stepper motor that described valve rotates, described screen pack and valve are separately positioned on the two ends of the first connecting pipe, and described stepper motor is connected with control module.
3. the pick-up unit of portable dissolved methane content according to claim 2 is characterized in that: described valve is with the sampling groove, and described valve winds the axial-rotation perpendicular to the first connecting pipe under stepper motor drives.
4. the pick-up unit of portable dissolved methane content according to claim 2 is characterized in that: described vaporization unit comprises vaporizer and is arranged on electric heating sheets in the described vaporizer, and described valve is communicated with vaporizer by the second connecting pipe.
5. the pick-up unit of portable dissolved methane content according to claim 4 is characterized in that: also be enclosed with thermofin outside the described vaporizer.
6. the pick-up unit of portable dissolved methane content according to claim 4, it is characterized in that: described pressure regulating unit comprises subsidy gas storehouse and the accent air compression cabin that is communicated with described vaporizer by the 3rd connecting pipe, described subsidy gas storehouse is connected with aspiration pump with transferring air compression cabin by one-way cock respectively, and described aspiration pump is connected with control module.
7. the pick-up unit of portable dissolved methane content according to claim 6, it is characterized in that: described detecting unit comprises the sensing chamber that is communicated with described accent air compression cabin and the methane detector that is arranged in the described sensing chamber, described methane detector is connected with control module, and described sensing chamber one end also is provided with exhausr port.
8. the pick-up unit of portable dissolved methane content according to claim 7 is characterized in that: be provided with gas separation membrane between described accent air compression cabin and sensing chamber.
9. the pick-up unit of the described portable dissolved methane content of each claim according to claim 1-8, it is characterized in that: described control module is MCU.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220272651 CN202676691U (en) | 2012-06-11 | 2012-06-11 | Portable dissolved methane content detection device |
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| CN 201220272651 CN202676691U (en) | 2012-06-11 | 2012-06-11 | Portable dissolved methane content detection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680658A (en) * | 2012-06-11 | 2012-09-19 | 山东省科学院海洋仪器仪表研究所 | Portable device for detecting content of dissolved methane |
| CN105203491A (en) * | 2015-10-10 | 2015-12-30 | 山东省科学院海洋仪器仪表研究所 | In-situ detection system for concentration of methane in deep sea |
| CN107462685A (en) * | 2017-07-26 | 2017-12-12 | 中国地质调查局油气资源调查中心 | A kind of permafrost region underground water body dissolved methane Long-term Monitoring Systems and method |
| CN107884365A (en) * | 2017-12-14 | 2018-04-06 | 中国科学院深海科学与工程研究所 | A kind of deep-sea gas-detecting device based on partial pressure principle of mobile equilibrium |
| CN114323111A (en) * | 2020-10-10 | 2022-04-12 | 中国石油天然气集团有限公司 | Methane emission monitoring system and method for oil-gas field development |
-
2012
- 2012-06-11 CN CN 201220272651 patent/CN202676691U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680658A (en) * | 2012-06-11 | 2012-09-19 | 山东省科学院海洋仪器仪表研究所 | Portable device for detecting content of dissolved methane |
| CN105203491A (en) * | 2015-10-10 | 2015-12-30 | 山东省科学院海洋仪器仪表研究所 | In-situ detection system for concentration of methane in deep sea |
| CN107462685A (en) * | 2017-07-26 | 2017-12-12 | 中国地质调查局油气资源调查中心 | A kind of permafrost region underground water body dissolved methane Long-term Monitoring Systems and method |
| CN107462685B (en) * | 2017-07-26 | 2018-07-06 | 中国地质调查局油气资源调查中心 | A kind of permafrost region underground water body dissolved methane Long-term Monitoring Systems and method |
| CN107884365A (en) * | 2017-12-14 | 2018-04-06 | 中国科学院深海科学与工程研究所 | A kind of deep-sea gas-detecting device based on partial pressure principle of mobile equilibrium |
| CN114323111A (en) * | 2020-10-10 | 2022-04-12 | 中国石油天然气集团有限公司 | Methane emission monitoring system and method for oil-gas field development |
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| Date | Code | Title | Description |
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| 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: 20130116 Termination date: 20130611 |