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1. How to calibrate the SDCY-6024d sulfur analyzer? The calibration of the SDCY-6024D sulfur analyzer requires strict adherence to the steps, and the core is to adjust the system parameters through standard coal sample testing to ensure the accuracy of the measurement results. 1. Before calibration, prepare for an air tightness check by adjusting the flow meter to 1.0L/min to ensure that there are no leaks in the gas path; Calibrate the stirring speed to the maximum roughness without losing step, ensuring that sulfur dioxide is fully titrated; Maintain the electrolytic cell. If the electrode piece becomes black, it should be scraped or wiped with ethanol, and a new electrolyte should be replaced; Weigh the standard coal sample accurately to 0.0002g, and pre measure its air dry basis moisture to calculate the dry basis sulfur content; Control the temperature of the furnace rock chain at (1150 ± 10) ℃ and replace the failed silica gel in the purification tube. Calibration steps: First, conduct 2-5 waste sample tests to achieve the optimal state of the system; Select three types of standard coal samples, low, medium, and high, and conduct three tests each. If the results are within the allowable error, take the average. For low sulfur samples, adjust by the coefficient n (0 represents addition, 1 represents subtraction); For medium to high sulfur samples, the maximum adjustment value of u and n is 0.09 by adjusting the coefficient u (also 0 plus 1 minus); In addition, the overall coefficient L (initial value of 1.000, range of 0.900-1.100) can be adjusted. If it is increased, the result will be raised, and if it is decreased, the result will be lowered. After each adjustment, press the display change button "3" to obser
3. Validity verification and inspection. Choose 1-2 certified coal standard substances for measurement. If the difference between the measured value and the standard value is within the range of synthetic uncertainty, the calibration is valid. Otherwise, recalibration is required; During sample testing, coal samples with known total sulfur content should be regularly used for measurement. When the measured value is not within the repeatability limit or the uncertainty range of the standard value, the cause should be identified and recalibrated. It is recommended to perform calibration checks at the beginning and end of each batch of sample testing.
2. Corrosion resistance level WF2, sulfur dioxide corrosion test
The sulfur dioxide corrosion test in corrosion resistance level WF2 is carried out according to the GB/T 2423.33-2021 standard, and the specific experimental conditions and procedures need to be carried out in accordance with the requirements of this standard. The following is a detailed explanation of the relevant experiments:
1. The core basis of the sulfur dioxide corrosion test standard source: The experimental method strictly follows GB/T 2423.33-2021 "Environmental Testing Part 2: Test Methods Test Kca: High Concentration Sulfur Dioxide Test", which specifically evaluates the corrosion resistance of materials or products in sulfur dioxide environment.
. Experimental objective: To simulate a high concentration sulfur dioxide corrosion environment and test the corrosion resistance of the sample in sulfur-containing environments such as industrial pollution and chemical scenes, ensuring that it meets the WF2 anti-corrosion level requirements.II. Experiment
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