The necessity of installing gas detectors in sewage treatment plants
The necessity of installing gas detectors in sewage treatment plants. In recent years, the rapid development of the national economy and the significant improvement of people's living standards have driven the demand for sewage treatment, and the number of sewage treatment plants is also increasing.
Sewage treatment plants mainly deal with domestic wastewater and industrial wastewater. During a series of processing processes, various toxic gases will be produced, which will not only cause great harm to the health of factory workers, but also affect the health of surrounding residents. Therefore, it is very necessary to install gas detectors in the factory area.
Toxic and harmful gases may be produced in the water inlet pipes of many sewage treatment plants, various clear water tanks, thickening tanks, underground sewage, sludge gate wells and stagnant sewage tanks. Moreover, the gases produced are of various types and complex in composition. According to the different ways of harm, these gases can be divided into two categories: toxic gases and flammable and explosive gases.
1. Toxic gas
Toxic gases produced by sewage treatment plants include methane, hydrogen sulfide, carbon monoxide and carbon dioxide, hydrogen cyanide, etc. These gases come from various sources, such as sewage tanks, pumping stations, aeration tanks, sludge digesters, deodorization workshops and treatment workshop. Among them, hydrogen sulfide is a kind of acute poison, which has a special smell at a low concentration (0.0047ppm), which is easy to distinguish; but when the concentration exceeds 150ppm, people's olfactory nerves will be damaged and they will not be able to smell its smell , so as to cover up its true existence, even if the hydrogen sulfide reaches a lethal concentration of 800pm, workers cannot smell its smell, which is very easy to cause fatal danger.
2. Flammable and explosive gas
During wastewater treatment, aeration and sludge digestion are usually high-risk areas for biogas generation. Since the main component of biogas is methane, it not only has the risk of explosion, but also reduces the concentration of oxygen and causes suffocation of the human body; if the biogas generated during the sludge digestion process leaks out of the digester, it will be very dangerous and may cause explode.
Through the above analysis, it can be seen that the sewage treatment plant must install and use toxic and harmful gas detection alarms in accordance with national regulations. The gas alarm will be monitored in real time for 24 hours. Once the gas concentration exceeds the standard, it will immediately alarm and display. At the same time, the Safety Supervision Bureau also requires that the sewage treatment plant must be equipped with safety protection equipment in accordance with the regulations of the Safety Supervision Bureau, such as gas masks, air respirators, protective clothing, portable gas detectors, labor safety shoes, protective gloves and other safety protection products to ensure that the operation Safety of personnel at work.
According to the different types of gases produced by the sewage treatment plant, gas detectors with different functions need to be installed. Gas detectors are divided into fixed and portable. During the installation process of sewage treatment plants, portable and fixed gas detectors can be used in combination. According to some toxic gases and flammable and explosive gases commonly produced in sewage treatment plants, corresponding gas detectors are installed in a targeted manner, such as methane gas detectors, carbon monoxide gas detection alarms, carbon dioxide gas detection alarms, etc.
The toxic and harmful gases produced by the sewage treatment plant pose a certain threat to both the staff and the surrounding residents. Therefore, the sewage treatment plant must pay attention to the installation and use of gas detectors, and add a safety protection for the production of enterprises to prevent dangerous accidents. .
