A multi-parameter detection device for oil and gas concentration

A detection device, oil and gas concentration technology, applied in the direction of measuring devices, color/spectral characteristic measurement, instruments, etc., to achieve high sensitivity and selectivity, high selectivity measurement, and improve the effect of coupling coefficient

Active Publication Date: 2018-08-21
重庆科知源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Analyzing the current situation at home and abroad, it is found that the current oil and gas combustible gas detection technology is mainly for the measurement of mixed gases, and the optical fiber sensing device for simultaneous detection of multiple gases (such as methane, ethane and propane) in oil and gas combustible gases has not been reported. Tilted fiber gratings are more sensitive to the external environment than other fiber optic sensors, so they can be used to detect oil and gas combustible gases

Method used

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  • A multi-parameter detection device for oil and gas concentration
  • A multi-parameter detection device for oil and gas concentration
  • A multi-parameter detection device for oil and gas concentration

Examples

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Embodiment 1

[0050] Methane sensor, ethane sensor and propane sensor coated with sensitive film on the cladding surface of tilted long-period fiber grating, the grating period is 400μm, the number of periods is 40, the grating length is 16mm, the tilt angle is 75°, and the transmission loss is 32.6dB, 31dB, 33.5 respectively dB, the initial values ​​of resonance wavelength are 1558.54nm, 1559.6nm, 1558.0nm respectively. For standard gases with methane concentration (0-5% (v / v)), ethane concentration (0-2.9% (v / v)) and propane concentration (0-2.1% (v / v)) , interacting with the sensitive film on the cladding surface of the grating respectively, the resonant wavelength of the grating shifts to the long wavelength direction with the increase of the gas concentration of methane, ethane and propane, and the shift of the resonant wavelength is linear with the concentration of methane, ethane and propane relevant.

[0051] In the experiment, methane standard gases with known methane concentratio...

Embodiment 2

[0069] Methane sensor, ethane sensor and propane sensor coated with sensitive film on the cladding surface of tilted long-period fiber grating, the grating period is 430μm, the number of periods is 40, the grating length is 17.2mm, the tilt angle is 75°, and the transmission loss is 31.5dB and 32.4dB respectively , 32.9dB, and the initial values ​​of resonance wavelengths are 1557.64nm, 1558.4nm, and 1557.5nm, respectively. For standard gases with methane concentration (0-5% (v / v)), ethane concentration (0-2.9% (v / v)) and propane concentration (0-2.1% (v / v)) , interacting with the sensitive film on the cladding surface of the grating respectively, the resonant wavelength of the grating shifts to the long wavelength direction with the increase of the gas concentration of methane, ethane and propane, and the shift of the resonant wavelength is linear with the concentration of methane, ethane and propane relevant.

[0070] In the experiment, methane standard gases with known met...

Embodiment 3

[0088]Methane sensor, ethane sensor and propane sensor coated with sensitive film on the cladding surface of tilted long-period fiber grating, the grating period is 450μm, the number of periods is 40, the grating length is 18mm, the tilt angle is 75°, and the transmission losses are 32.5dB, 32.8dB, 33.9dB, the initial values ​​of resonance wavelengths are 1556.68nm, 1558.6nm, 1557.2nm respectively. For standard gases with methane concentration (0-5% (v / v)), ethane concentration (0-2.9% (v / v)) and propane concentration (0-2.1% (v / v)) , interacting with the sensitive film on the cladding surface of the grating respectively, the resonant wavelength of the grating shifts to the long wavelength direction with the increase of the gas concentration of methane, ethane and propane, and the shift of the resonant wavelength is linear with the concentration of methane, ethane and propane relevant.

[0089] In the experiment, methane standard gases with known methane concentrations of 0, ...

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Abstract

The invention discloses a detection device for multiple parameters of oil and gas concentration. The detection device comprises a broadband light source, a methane sensor, an ethane sensor, a propane sensor, a humidity sensor, a temperature sensor, optical switches, a testing gas chamber, a computer, a mass flow controller and the like, wherein the front ends of all the sensors are connected with the broadband light source through the optical switch I; the rear ends of all the sensors are connected with a spectrum analyzer through the optical switch II; all the sensors are positioned in the testing gas chamber; sensitive membranes of the tilted long-period fiber grating methane, ethane and propane sensors are low refractive index ultraviolet-curing fluorosilicone sensitive membranes containing cage molecules (a cage molecule A, a cage molecule E-(OC3H7)6 or a cage molecule M-(OC3H7)6) and graphene; when methane, ethane and propane to be detected interact with the corresponding sensitive membranes, refractive indexes of the sensitive membranes are changed, and transmission spectra of the methane sensor, the ethane sensor and the propane sensor are enabled to drift; by means of the drift amount of the transmission spectra in the spectrum analyzer, the concentrations of the methane, the ethane and the propane can be measured.

Description

technical field [0001] The invention relates to an oil gas concentration detection device, in particular to a multi-parameter oil gas concentration detection device. Background technique [0002] Oil is the lifeblood of the national economy, and oil reserves are the most direct and effective means to stabilize supply and demand, stabilize oil prices, and respond to emergencies. All countries reserve oil as a strategic material, forming oil reserves composed of large storage tanks. Petroleum products are highly volatile and diffusible, and have the characteristics of flammability and explosion, static electricity accumulation, and thermal expansion. Therefore, real-time monitoring of the concentration of volatile oil and gas in oil and gas storage tanks is of great significance for the safe operation of oil and gas storage tanks. [0003] Most of the large oil storage tanks adopt an external floating roof structure, and the top cover on the oil tank floats on the oil surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01D21/02
CPCG01D21/02G01N21/25
Inventor 杨建春周浪车鑫陈伟民
Owner 重庆科知源科技有限公司
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