Before entering work in closed space pipelines and other places, the measurement of oxygen concentration is a necessary detection step to ensure the safety of personnel. Therefore, industrial pipeline oxygen content detectors are often used, because oxygen is necessary for our human body. If the oxygen concentration is low, When the oxygen concentration is below 19.5%, hypoxia will occur, which will affect work efficiency and cause dizziness and other problems. If the oxygen concentration is below 12%, judgment will be lost. When the oxygen concentration is below 6%, people will breathe within 40 seconds. Stop , so sensors are needed for oxygen concentration monitoring in the field of industrial oxygen monitoring . Below, the editor of Gongcai.com introduces the quality standards of industrial oxygen and the application scheme of oxygen content detection sensors in industrial pipelines through this article.
Industrial oxygen quality standards
The national standard “Industrial Oxygen” ( GB/T 3863-2019) provides detailed regulations on the quality standards of industrial oxygen. Among them, industrial oxygen should meet the following main quality indicators:
1. Oxygen purity: The purity requirement for industrial oxygen is generally above 99.5%. Depending on the needs of actual applications, high-purity oxygen can sometimes be produced according to user requirements. At the same time, the impurity content in oxygen should also meet standard requirements.
2. Oxygen moisture: The moisture content in industrial oxygen is also an important indicator. Excessive oxygen and moisture content may cause corrosion and other problems. According to standard regulations, the moisture content in oxygen should not exceed 2.0 mg/cubic meter.
3. Oxide content: The content of oxides in industrial oxygen, such as sulfur dioxide and nitric oxide, also needs to be controlled within a certain range. Standards stipulate that the sulfur dioxide content in oxygen should not exceed 5.0 mg/cubic meter, and the nitric oxide content should not exceed 10.0 mg/cubic meter.
4. Smoke and dust content: The smoke and dust content in industrial oxygen must be lower than a certain limit to avoid pollution to production equipment and the environment. Standards stipulate that the soot content in oxygen should not exceed 2.0 mg/cubic meter.
Chemical content: The content of chemical substances in industrial oxygen also needs to be controlled within a certain range to avoid adverse effects on the production process and equipment. Standards stipulate that the total carbon content in oxygen should not exceed 1.0 mg/cubic meter.
During industrial pipeline operations, due to the particularity of the workplace, such as working in a confined space, it is easy to cause hypoxia and suffocation due to insufficient oxygen. In chemical process sites, too much or too little oxygen will affect the results. In severe cases, It may cause fire or explosion, so the Industry and Mining Network recommends the British SST threaded high-temperature zirconia oxygen sensor (O2 sensor) – O2S-FR-T2-18C/B/A to detect oxygen concentration in industrial pipelines to prevent hypoxia in the working environment. and oxygen enrichment.
British SST threaded high-temperature zirconia oxygen sensor (O2 sensor) – O2S-FR-T2-18C/B/A is a zirconia oxygen sensor. The sensitive element is an oxide junction. It uses two oxide junction disks with a seal in the middle. space. One of the coiled functions is a reversible oxygen pump that sequentially fills and evacuates the small space with sample gas. The other disk is used to measure the oxygen partial pressure difference ratio to obtain the corresponding sensing voltage . When the zirconia disk operates as an oxygen pump, the required temperature of 700°C is generated by the heating element (the accompanying circuit board 02I-FLEX-092 can provide heating and linear analog output functions.). The time it takes for the oxygen pump to reach the rated minimum and maximum pressures in a small space has a corresponding relationship with the oxygen partial pressure in the environment.
