The common gas circuit of the sulfur measuring instrument in Qian’an City, failure analysis and improvement

Sulfur tester is a kind of coal testing equipment, and the total sulfur content in coal is one of the important indicators for evaluating coal quality. In order to quickly and accurately analyze the total sulfur content, we use an automatic sulfur analyzer to analyze the sulfur in the coal. The following is a brief description of the problems and troubleshooting methods encountered by our technicians since they have been experimenting. Part of the air circuit failure: The air extraction speed of the air purification system will directly affect the entire test result. The flow indication of the float flowmeter must be kept at 000ml/min. This point of the calorimeter is worth noting. () When the flow rate is low, the decomposed sulfur dioxide gas cannot be pumped into the electrolytic cell for titration in time, which will result in a low result. (2) When the flow rate is high, the silicon-sulfur aluminum wool in the combustion tube will be pumped from the constant temperature zone to At the different diameter of the combustion tube, the coal sample is pumped into the electrolytic cell without being completely burned, and the result will also be low. (3) When the pumping volume is less than 000ml/min, check whether the pipeline leaks: whether the bottle plug is tightly compressed; Whether the medicine is blocked by damp; whether the filter is dirty to increase the air resistance. Finally, check whether the micro air pump is malfunctioning. Ordinary air pumps are prone to diaphragm damage and air leakage. It is best to use high-quality micro air pumps to improve the reliability of the whole machine. For example, GAST, KNF or domestic “Chengdu Qihai” micro pumps are very reliable. (4) At the same time, check whether the aluminum silicate wool in the combustion tube is blocked. The poor air permeability of aluminum silicate cotton can also cause low results. At this time, the aluminum silicate wool in the combustion tube should be replaced. Its thickness should be 3~4mm, and the circumference should be thin and the middle thick. (5) The speed of the magnetic stirrer should be controlled at about 500rpm to reduce the effect of the electrolysis voltage on the adsorption reaction. Influence. If the speed is too low, the electrolyzed iodine will not easily diffuse, contaminate the electrode, and cause tailing, which will make the result low. In addition, the quality of the voltage directly affects the speed of the agitator, which is also one of the causes of tailing. In short, when tailing occurs, it is necessary to find the reasons from many aspects: such as the fracture of the combustion tube, the occurrence of trachoma, etc., which directly affect the result and make the measured value low.Henan Analytical Instrument Co., Ltd. Chaohu City

Sulfur tester is a kind of coal testing equipment, and the total sulfur content in coal is one of the important indicators for evaluating coal quality. In order to quickly and accurately analyze the total sulfur content, we use an automatic sulfur analyzer to analyze the sulfur in the coal. The following is a brief description of the problems and troubleshooting methods encountered by our technicians since they have been experimenting. Part of the air circuit failure: The air extraction speed of the air purification system will directly affect the entire test result. The flow indication of the float flowmeter must be maintained at 000ml/min. This point is worth noting. () When the flow rate is low, the decomposed sulfur dioxide gas cannot be pumped into the electrolytic cell for titration in time, which will result in low results. (2) When the flow rate is high, the silicon-sulfur aluminum wool in the combustion tube will be pumped from the constant temperature zone. At the different diameter of the combustion tube, the coal sample is pumped into the electrolytic cell without being completely burned, and the result will also be low. (3) When the pumping volume is less than 000ml/min, check whether the pipeline leaks: whether the bottle plug is tightly compressed; Whether the medicine is blocked by damp; whether the filter is dirty, increasing the air resistance. Finally, check whether the micro air pump is malfunctioning. Ordinary air pumps are prone to diaphragm damage and air leakage. It is best to use high-quality micro air pumps to improve the reliability of the whole machine. For example, GAST, KNF or domestic “Chengdu Qihai” micro pumps are very reliable. (4) At the same time, check whether the aluminum silicate wool in the combustion tube is blocked. The poor air permeability of aluminum silicate cotton can also cause low results. At this time, text should be randomly added to the content (intercepted words 30-50)