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A carbon and sulfur content detection method and detection system

A technology for carbon and sulfur content and detection methods, which is applied in measurement devices, instruments, scientific instruments, etc., can solve problems such as errors and the stability of measurement results cannot be guaranteed, and achieve the effects of improving stability, accuracy and repeatability

Active Publication Date: 2022-03-29
SICHUAN ENG TECHN COLLEGE
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Problems solved by technology

Due to the nonlinear characteristics of the pyroelectric infrared sensor, the detection results are nonlinear, so the content of carbon and sulfur calculated according to the linear characteristics has certain errors, resulting in the stability of the measurement results cannot be guaranteed

Method used

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  • A carbon and sulfur content detection method and detection system
  • A carbon and sulfur content detection method and detection system
  • A carbon and sulfur content detection method and detection system

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] The oxygen supply device feeds oxygen into the combustion furnace in the infrared carbon and sulfur analyzer, the sample is burned, and the gas obtained after combustion is fed into the gas flow detection device to detect the gas flow into the carbon / sulfur detection cell. Get the gas flow rate V t ; The gas flow detection device is connected to the controller, and the controller obtains the gas flow velocity signal value V t . The gas is passed into the carbon / sulfur detection cell of the infrared carbon and sulfur analyzer. The infrared carbon and sulfur analyzer uses an infrared sensor to detect the concentration of carbon dioxide / sulfur dioxide in the gas, and outputs the signal value I of the pyroelectric infrared sensor t . The infrared pyroelectric sensor is connected to the controller, and the controller obtains the output sig...

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Abstract

The present invention discloses a method for detecting carbon / sulfur content. The present invention maintains the concentration of the target gas (carbon dioxide or sulfur dioxide) in the mixed gas after the sample is burned by controlling the flow rate of oxygen fed into the combustion furnace. range, so that the infrared pyroelectric sensor output signal value I t Within a pre-set interval, suppress I t The non-linear relationship between the value and the calculation result of the concentration of carbon dioxide or sulfur dioxide can reduce the influence of non-linearity on the uncertainty of the test results, significantly improve the stability of the test results of different samples or the same sample, and improve the accuracy of the measurement results. and repeatability. The invention also discloses a detection system for the carbon / sulfur content detection method, which includes an oxygen supply device, a flow regulating device, a combustion furnace, a gas flow detection device, a carbon / sulfur detection pool, a PC and a controller.

Description

technical field [0001] The invention relates to the field of instrument detection, in particular to a carbon and sulfur content detection method and detection system for a carbon and sulfur analyzer. Background technique [0002] In the detection of carbon / sulfur content, infrared carbon and sulfur analyzers are commonly used. Its working principle is: to burn samples containing carbon and sulfur to produce carbon dioxide and sulfur dioxide gas molecules, because different gases have different selective absorption spectra in the infrared band , The gas concentration can be detected by passing the combusted gas into the corresponding gas detection chamber. The theoretical basis for detecting gas concentration in the gas detection chamber is the Lambert-Beer law. Different gases have different absorption characteristics of infrared light, and different pyroelectric infrared sensors are required for detection. Therefore, carbon detection cells are required to detect the concent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504
Inventor 陈昌海王静李振峰李放
Owner SICHUAN ENG TECHN COLLEGE
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