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About the monitoring of ammonia sensors in industry

by:Rika Sensors     2021-11-23
About the monitoring of ammonia sensors in industry
When it comes to ammonia, most people may not be very familiar with it. But in fact, we are very easy to come into contact with ammonia in our daily lives. However, in industry, ammonia is an important chemical raw material and is widely used in various types of cold storage. Ammonia is widely used in the production of urea, soda ash, ammonium nitrogen fertilizer and nitric acid, such as the production of chemical fertilizers, nitric acid, ammonium salts, soda ash, and the production of synthetic fibers, plastics, dyes, and urea in the organic synthesis industry.

In recent years, with the rapid development of my country’s industrial economy, the amount of ammonia emitted into the atmosphere from all walks of life has gradually increased, and the impact of these rising levels of ammonia on the climate has also become increasingly significant. On the one hand, ammonia in the atmosphere will react with gaseous pollutants such as sulfur dioxide and nitrogen oxides to form secondary aerosol particles that absorb and scatter light, reducing the visibility of the atmosphere. On the other hand, ammonia emitted into the atmosphere affects the temperature of the atmosphere as a greenhouse gas.

According to the national standard TJ36-79, ammonia is a hazardous substance in the air of the workshop, so it is a toxic gas. According to the 'Classification of Occupational Exposure Toxic Substance Hazard Degree' GB5044-1985, it belongs to Class IV (mild hazard); but According to the 'Installation Specification for Combustible Gas and Toxic Gas Detection Alarm. Use norms. The relevant regulations in 'Design Code' GB5044-83 do not clearly state that ammonia is a combustible gas and toxic gas, so the design code for combustible gas and toxic gas detection alarms for petrochemical enterprises does not specify detection.

In the 'Indoor Air Quality Standard' GB/T18883-2002, it is stipulated that the maximum allowable concentration of ammonia in indoor air is 0.2mg/m3. (Incorporating 0.2635PPm); but in the 'Design Hygienic Standard for Industrial Enterprises' (TJ36-79) Chapter 3 Workshop Hygiene Article 32 The concentration of harmful substances in the air of the workshop, the upper limit of the allowable concentration of harmful substances in the air of the workshop, ammonia It is 30 mg/m3 (total 39.53ppm).

Regarding the emission standard, it is stipulated in the 'Emission Standard of Odor Pollutants' GB14554-93 that the corresponding standard values u200bu200bin the secondary and tertiary standards implemented by enterprises are 2.0 mg / m3 and 5.0 mg / m3, (combined 2. 635ppm and 6.558ppm).

But for a long time, the amount of ammonia emissions and its impact on the atmospheric environment and climate have not been paid enough attention. If the ammonia concentration is too high, it will cause certain damage to the human body. If exposed to an environment with too high ammonia concentration for a long time, the skin tissue and respiratory system of the human body will be irritated and damaged, and the ammonia will be adsorbed on the skin and mucous membranes of the human body. On the conjunctiva of the eye, it produces irritation and causes inflammation. If the human body inhales excessive amounts of ammonia, sore throat, chest tightness, breathing difficulties and other poisoning phenomena will occur, and may even lead to death.

In order to avoid accidents during manual operations, it is necessary to monitor the concentration of ammonia in the environment. The ammonia sensor adopts the imported big brand ammonia sensor, which has the characteristics of rapid and sensitive response and strong anti-interference ability. It has passed our unique compensation algorithm, multi-stage standard gas calibration, and a variety of measurement ranges, 0~50PPM, 0~100PPM , 0~500PPM. The measurement accuracy is high, within ±2% FS, and the repeatability can reach within 2%. It also has the characteristics of long life, high precision, high repeatability and high stability. Optional high-quality OLED display, the value can be viewed directly on site, and can be displayed clearly at night. The product adopts a wall-mounted waterproof shell, which is easy to install and has a high degree of protection, which can be used in harsh on-site environments. It is suitable for occasions requiring real-time monitoring and control of ammonia gas, such as agricultural greenhouses, breeding farms, pesticide manufacturers, and chemical plants.



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