The basic working principle of infrared carbon* analyzer

The basic working principle of the high-frequency infrared carbon-sulfur analyzer is: sampling industrial materials, based on high-frequency induction principle and flux, ensure adequate oxygen supply, and fully burn the sample. The result will be the carbon contained in the sample. Sulfur is converted into carbon dioxide (CO2) and sulfur dioxide (SO2), and then CO2 and SO2 are used to absorb the infrared light energy of a specific wavelength. The concentration signals of CO2 and SO2 are converted into voltage signals, which are finally obtained by software analysis. The voltage signal is analyzed to obtain the contents of CO2 and SO2, which corresponds to the contents of carbon and sulfur. High-frequency infrared carbon-sulfur analyzer (GQ-HW6F type) Application field Determination of steel, iron, alloy, casting core sand The mass fraction of carbon and sulfur in non-ferrous metals, cements, ores, coke, catalysts, and other materials. It fully automates high-tech products such as light, machine, electricity, computers, sensors, and analysis technology. The integrated design of the whole machine has a wide measuring range, strong anti-interference ability, complete functions, and accurate and reliable analysis results.

Measurement range of instrument parameters Carbon: ω (C) 0.0001%-10.0000% (expandable to 99.999%)

Sulfur: ω(S) 0.0001%-0.5000% (expandable to 99.999%)

Analysis error Carbon: Conforms to ISO 9556-94 Standard Sulfur: Conforms to ISO 4935-94 Standard Adjustable time 20-90 seconds. (usually in about 35 seconds) high-frequency furnace power ≥ 2.5kVA;

Oscillating frequency: 18MHz electronic balance Unbalanced electronic weighing scale, reading accuracy: 0.0001g Working environment Room temperature: 10-30°C Relative humidity: less than 90% Outstanding features Infrared detection system ● Circuit design: The whole machine adopts embedded single chip microcomputer technology Electronic circuits are highly integrated and stable and reliable.

● Power: Integrated linear module power supply, stable output, no fault.

● Light source: A special new type of platinum infrared light source with continuous heating and high spectral efficiency.

● Analytical cell: gold-plated carbon-sulfur analysis cell and high-resolution pyroelectric infrared detector (up to 10-11).

● Motors: Synchronous motors for aviation, with good thermal stability and a continuous service life of 100,000 hours. High-frequency combustion system ● High-frequency circuit: High-power high-frequency circuit design, using 6KVA high-frequency power tube (actual use power is greater than 2.5kVA, without sample burning), to reduce the load of high-frequency combustion system, and increase service life.

●Safety design: Automatic detection of solenoid valves, lifting cylinders and high-frequency working conditions, automatic over-time and over-current protection.

● Air path: High-precision flow controllers and imported air circuit systems (solenoid valves, pipe joints, lifting cylinders) ensure stable air flow.

● Dedusting system: 0.4 micron ultra-porous metal filter, furnace head automatic cleaning, and inlet ash discharge system to reduce the impact of dust on the analysis results. Random Software ● Infrared carbon and sulfur specific software based on WINDOWS system, complete software functions, file assistance, system monitoring, curve/data storage, blank subtraction, parameter setting, channel selection, mathematical statistics, result correction, breakpoint correction, curve More than forty functions such as comparison, system diagnostics, automatic/manual print analysis results.

● Dynamic data integration, linear/error automatic correction, dynamic display of various real-time data and carbon, sulfur release curves during analysis.

● Multi-channel operation, users can choose different channels according to different materials and contents.

● The data can be transmitted over a long distance to realize the number of reports before the furnace. The modular structure design of the whole machine adopts a modular design technology. The power system consists of two solid state power modules, dust-proof, simple and reliable; the flat wire connectors are used instead of the connection. The slot form improves the reliability of the entire circuit and the connection reliability between the lines, and has a strong structure. The pneumatic system adopts aerodynamic principles, and a high-pressure ash discharge, automatic sweeping furnace head is designed, and the furnace head heating device is added to effectively reduce the influence of dust on the elemental sulfur analysis. Gas circuit components including solenoid valves, cylinders, gas pipelines, gas pipeline joints are all imported from Italian CAMOZZ1 Pneumatic Co., Ltd. Components, solenoid valve life of more than a million times, the cylinder uses no oil lubrication technology, suitable for harsh field environment, from the fundamental It solves the problems of the reliability and tightness of common gas system in domestic products.

The design of high-frequency furnace 1, high-frequency furnace output power of 2.5 kilowatts, use of air-cooled ceramic power tube and make it work in the derated state, to improve the power output stability and component life.

2. The main capacitor adopts a vacuum ceramic capacitor with a rated current of 100 amps, which has extremely low dielectric loss and excellent stability, and effectively improves the reliability and stability of the power output.

3. All metal connection parts of high-frequency furnace adopt silver-plated and anti-oxidation conductive film technology on copper surface; high-Q ferrite core coil is used; cooling air duct is provided to enhance the cooling fan power and improve the thermal stability of power components. . Through the above design, the optimal release of carbon and sulfur in the sample is ensured.

Infrared detection system core components infrared detection pool selection of high-efficiency, long-life precious metal micro infrared light source and metal mirror; modulation system using high-precision stepper motor controlled by a single chip, to achieve the long-term stability of the modulation frequency, combined with the international advanced level Infrared pyroelectric solid light cone sensor, narrowband filter, detector, etc. The proprietary components and high-accuracy A/D sampling card of the Shanghai Institute of Technical Physics of the Chinese Academy of Sciences make the whole machine highly sensitive to detection and can effectively detect ppm. Grade carbon and sulfur content.

Detection range and accuracy Adopt a series of effective measures such as high-pressure ash discharging, automatic cleaning, high-precision flow control and pressure compensation in the design of the air circuit. Combine the full scale calibration technology and the linear weight compensation technology of Deke company to make the instrument Has a wide range of detection. The detection limit of carbon up to 100%, sulfur up to 100%, while using Switzerland METTLER TOLEDO one-tenth electronic balance, the analysis accuracy reached the international advanced level, carbon analysis accuracy ≤ 0.4ppm or RSD ≤ 0.4%, Sulfur analysis accuracy ≤ 0.5ppm or RSD ≤ 1.2%.

The application software is used in the Chinese application software of WINDOWS2000 operating system. The PC interface adopts the USB data exchange technology, constructs a system working mode of communication between the upper and the lower computer, multi-window and multi-task operation, and realizes automatic data management in the database management. Store, possess a powerful, multi-filter database search engine, remote monitoring of the database through the network, synchronized display of the working curve, storage, amplification and multi-level comparison of multiple curves.

Linearized calibration infrared carbon-sulfur analyzer is used to analyze the carbon and sulfur content of substances by detecting the absorption of infrared radiation by CO2 and SO2 gases; linearization calibration is a key technology in instrument data, as Lambert's law is consistent with the index Because of the regularity and the infrared filter has a certain bandwidth, the gas absorption coefficient is not constant, so it is very difficult to obtain the linear calibration of the integral area. We have made major breakthroughs in the design of calibration mode, calculation method, and calibration software and are superior to the best instruments in foreign countries. We have achieved good linearity in the full range. Our domestic counterparts almost use multi-air chamber segmentation calibration. Therefore, there are great disadvantages and limitations in use. The combustion temperature and the release rate of high carbon and high sulfur of high-temperature furnace temperature-programmed specimens have a certain influence on the accuracy of the analysis. At present, high-frequency furnaces on the market do not solve these problems well.