Question: Equipment for analyzing sulfur content in coal

Most rapid and intelligent sulfur determinators are produced in Hebi; they are very convenient to use. I’m not sure where the original poster is from – I’m from Taiyuan. I can carry out such measurements there, and you can contact me at zhgjdoc@126.com

Our school uses an integrated sulfur determination instrument (YX-DL), which operates on the Coulomb method. Manufacturer: Changsha Youxin Instrument Manufacturing Co., Ltd. The feed amount is around 50 mg, with a sample taken every 6 to 7 minutes generally. I did it last semester, and then I used a German Element analyzer to conduct a comparison – the differences were minimal! :lol

1.5.B. Sulfur determination by sulfur analyzer method {Integrated sulfur analyzer (YX-DL)} 1.5.B.1 Principle of the method: Under the action of a catalyst, coke burns and decomposes in an air stream; the sulfur contained in the coke is converted into SO2, which is then absorbed by a potassium iodide solution. Iodine generated by the electrolysis of this potassium iodide solution is used for titration, and the total sulfur content in the coke is calculated based on the amount of electricity consumed during electrolysis. 1.5.B.2 Reagents and materials 1.5.B.2.1 Tungsten trioxide (analytical grade) 1.5.B.2.2 Chromic silica gel (industrial grade) 1.5.B.2.3 Electrolyte: 5 g each of potassium iodide and potassium bromide, 10 ml of glacial acetic acid, dissolved in 250–300 ml of water. 1.5.B.2.4 Combustion boat: 70–77 mm in length, with a temperature resistance of over 1200°C. 1.5.B.3 Measurement 1.5.B.3.1 Turn on the printer in sequence, and then turn on the power switch of the measurement unit’s main unit. 1.5.B.3.2 Run the test program; click the “Power On” button with the mouse to start heating the high-temperature furnace. 1.5.B.3.3 Open the liquid inlet tube, start the air pump to draw the electrolyte into the electrolytic cell; the level of the electrolyte should generally not exceed 2 cm above the upper end of the electrode plates. Finally, adjust the flow meter so that the airflow rate is around 1000 ml/min. 1.5.B.3.4 When the furnace temperature reaches 1150°C, experiments can begin. A 0.05 g sample of coke with a particle size of less than 0.2 mm (accurate to 0.0002 g) is weighed in a porcelain boat; a thin layer of WO3 is placed on top of the sample, and the boat is then placed on a tray for testing. Before testing the official sample, 1 to 3 test samples must be made first to bring the electrolyte to an equilibrium state. A batch of samples must be processed consecutively. If there is a long interruption in between (more than half an hour), it is best to prepare a dummy sample before continuing the experiment. 1.5.B.3.5 After the experiment is complete, turn off the carrier gas system, drain the electrolyte, and clean the electrolytic cell with distilled water. 1.5.B.3.6 Return to the main menu and turn off the power switches of the sulfur determination instrument and the computer.

Shanghai Ourui Electrical Appliances: OR-6C integrated precision intelligent Chinese-character sulfur analyzer, OR-6B integrated microcomputer digital sulfur analyzer, OR-6A rapid sulfur determination instrument. I have never used any of the above; I mainly use the integrated sulfur determination instrument produced by Changsha Youxin (YX-DL). Its performance is relatively stable and the after-sales service is good, though the consumption of spare parts is high. There is another advantage: by purchasing Youxin products, one can attend training in Changsha. While dining across from Hunan TV Station, it is possible to see many celebrities as well as stunning dances by Russian beauties. I went on a business trip to Youxin in 2005, and to this day I often miss the happiness of those days.

We use the sulfur determination instrument from Changsha Sande; it is quite stable and easy to operate. SDSM2000 sulfur determination technical parameters: 1. Sulfur measurement range: 0.01–20% ； Sulfur resolution: 0.01% 2. Operating furnace temperature: 1150℃ ； Temperature control accuracy: <5°C 3. Sample weight: 40–60 mg 4. Testing time: 3–6 minutes per sample 5. Maximum power: <3 kW Key features 1. High degree of automation – automatic weighing, automatic sample feeding, and complete automation of the entire testing process, resulting in extremely low labor intensity ； 2. High degree of automation: Up to 20 coal samples can be tested continuously at a time, with no need for human intervention during the testing process; it is particularly suitable for the rapid analysis of large numbers of samples ； 3. It adopts a hardware-based integration method to overcome the error resulting from software integration, ensuring accurate and reliable test results ； 4. There is an insulating layer between the balance and the high-temperature furnace, protecting it from thermal radiation ； The high-temperature furnace uses imported new materials, featuring light weight, fast heating, and excellent heat retention properties ； 5. It has a low-temperature dormancy function, which can extend the service life of high-temperature furnaces and heating elements ； The total sulfur content in the sample was determined by Coulomb titration. You can get in touch online at the address: http://www.caigou.com.cn/netshow/E00023189/CP/55355.html