The water supply and sewage treatment industries produce many toxic and flammable gases, which need to be detected and removed. Due to different application methods, locations and treatment processes, the harmful gases produced are very different, but the solutions are the same-that is, to combine fixed and portable gas detection instruments.
In each stage of the water purification and sewage treatment process, various harmful gases are generated. Although for most (if not all) facilities, the harmful gases produced are the same. However, some specific places require special treatment processes and special gas detection methods. In most cases, a combination of fixed and portable gas detection equipment is required.
The role of installing gas detection equipment is not only to monitor the process, but more importantly. For safety reasons, to avoid personal injury. This kind of safety equipment must be built strong enough to withstand the stringent requirements of water supply and sewage treatment plants. There are many types of harsh environments, including unpredictable water levels and physical damage to testing equipment. As well as acidic or alkaline environments where gases such as hydrogen sulfide and chlorine react with water.
Drinking water purification facility
For drinking water purification facilities. The harmful gases that may be generated include chlorine. Sulfur dioxide. Ammonia. Ozone and chlorine dioxide, etc. These gases come from gas storage areas, gas use areas, and ozone generators.
Most of the drinking water needs to undergo a physical treatment process of flocculation. Filtration and ion exchange in the early stage of treatment. Only in the treatment disinfection stage. After the use of chemical substances, gas hazards will be generated. Chlorine is a traditional disinfectant for water treatment. In many countries. This is a legal requirement. Although other non-chemical methods (such as ultraviolet disinfection) can be used. The reason for choosing chlorine treatment . It can bring residual disinfectant downstream. In the process of chlorine treatment. From the chlorine storage tank to the final generation of clean water. Every step must be strictly monitored, including monitoring the valves and every room through which the chlorine pipe passes.
Most water plants still use chlorine treatment methods, but some plants have begun to switch to other alternative methods, such as ozone, chlorine dioxide or sodium hypochlorite. In addition, these factories that still use chlorine often use sulfur dioxide to remove the chlorine in the water after water treatment. Harmful gases are all harmful substances and must be effectively monitored. Sulfur dioxide only needs a very low concentration to cause harm to life. The high density of chlorine gas can be quickly absorbed by most substances, making its detection in the storage area difficult. Recently, people are paying more and more attention to the concentration of carbon dioxide in the closed space of the chalk area.
sewage treatment facility
Due to the different types of harmful gases and the need for personnel to enter certain areas of the water treatment plant. It is often necessary to combine portable and fixed gas detection equipment. Gas storage areas, ozone generators. Rooms through which gas pipelines pass. And water treatment workshops should always be equipped with fixed detectors to detect specific gases (or gas mixtures). In addition, when operators need to enter a closed space with harmful gases. Even if fixed detectors have been installed in these places. They must bring a portable detector with them as an additional safety precaution. In addition, according to requirements. These portable detectors can detect a single gas or multiple gases.
Sewage treatment facilities can produce many harmful gases. Such as methane (combustible gas). Hydrogen sulfide, carbon monoxide and carbon dioxide. These gases come from many sources. Such as sewage tanks, pumping stations. Aeration tanks, sludge digestion tanks. Deodorization workshops and treatment workshops.
Processes
The main and secondary treatment processes. Such as aeration and sludge digestion, are usually high-risk areas where biogas is produced. The biogas produced from sludge contains harmful substances such as methane. Hydrogen sulfide and carbon dioxide.
In addition to being extremely explosive, methane can also cause a decrease in oxygen concentration. Thereby increasing the risk of suffocation. On the other hand, hydrogen sulfide has a special odor at a low concentration (0.0047ppm), which is easy to distinguish.
But when the concentration exceeds 150ppm, the human olfactory nerve will be damaged and cannot smell its odor, thus covering it. With its real existence, even if hydrogen sulfide reaches a lethal concentration of 800pm, workers will not be able to smell it, which is a fatal danger. Since biogas is very easy to burn, the biogas produced in the process of sludge digestion can be used for power generation. Therefore, if it leaks from the digester, it will be very dangerous and may cause an explosion.
Commbinition
Similar to drinking water treatment, sewage is usually treated with chlorine gas (or chlorine substitute) before it can be discharged from the factory. Therefore, the same strict gas monitoring is also required from storage to the final processing stage.
Fixed gas detectors used to detect combustible gases must be installed in places such as sewage outlets and wet wells, because liquids containing combustible gases are discharged into the sewer from these places, and the combustible gas floats on the surface and then collects in the wet well Here, it finally reaches a flammable concentration, which constitutes a great danger.
Fixed detectors used to detect methane, carbon dioxide, oxygen and hydrogen sulfide must also be installed in all sludge decomposition and treatment areas. In addition, the deodorization workshop also needs to install fixed detectors to detect high. And low concentrations of hydrogen sulfide. Operators must bring portable gas detectors to enter enclosed spaces, such as sewage tanks, pumping stations, sludge digestion tanks. And sewage treatment workshops. In these cases. Acomposite gas detector is generally used.
in conclusion
The water supply and sewage treatment industries produce many toxic and flammable gases. Which need to be detected and removed. Due to different application methods. Locations and treatment processes, the harmful gases produced are very different. But the solutions are the same-that is, to combine fixed and portable gas detection instruments.
In each stage of the water purification and sewage treatment process. Various harmful gases are generated. Although for most (if not all) facilities, the harmful gases produced are the same. However, some specific places require special treatment processes and special gas detection methods. In most cases, a combination of fixed and portable gas detection equipment is required.
The role of installing gas detection equipment is not only to monitor the process, but more importantly. For safety reasons, to avoid personal injury. This kind of safety equipment must be built strong enough. FoR withstand the stringent requirements of water supply and sewage treatment plants. There are many types of harsh environments. Including unpredictable water levels and physical damage to testing equipment. As well as acidic or alkaline environments where gases such as hydrogen sulfide and chlorine react with water.
Drinking water purification facility
For drinking water purification facilities, the harmful gases that may be generated include chlorine, sulfur dioxide, ammonia, ozone and chlorine dioxide, etc. These gases come from gas storage areas, gas use areas, and ozone generators.
Most of the drinking water needs to undergo a physical treatment process of flocculation, filtration and ion exchange in the early stage of treatment. Only in the treatment/disinfection stage, after the use of chemical substances, gas hazards will be generated. Chlorine is a traditional disinfectant for water treatment. In many countries, this is a legal requirement. Although other non-chemical methods (such as ultraviolet disinfection) can be used.T
he reason for choosing chlorine treatment is that it can bring residual disinfectant downstream. In the process of chlorine treatment, from the chlorine storage tank to the final generation of clean water, every step must be strictly monitored, including monitoring the valves and every room through which the chlorine pipe passes.
Requirement
Most water plants still use chlorine treatment methods, but some plants have begun to switch to other alternative methods, such as ozone, chlorine dioxide or sodium hypochlorite. In addition, these factories that still use chlorine often use sulfur dioxide to remove the chlorine in the water after water treatment. Harmful gases are all harmful substances and must be effectively monitored. Sulfur dioxide only needs a very low concentration to cause harm to life. The high density of chlorine gas can be quickly absorbed by most substances, making its detection in the storage area difficult. Recently, people are paying more and more attention to the concentration of carbon dioxide in the closed space of the chalk area.
Due to the different types of harmful gases and the need for personnel to enter certain areas of the water treatment plant, it is often necessary to combine portable and fixed gas detection equipment. Gas storage areas, ozone generators, rooms through which gas pipelines pass, and water treatment workshops should always be equipped with fixed detectors to detect specific gases (or gas mixtures). In addition, when operators need to enter a closed space with harmful gases, even if fixed detectors have been installed in these places, they must bring a portable detector with them as an additional safety precaution. In addition, according to requirements, these portable detectors can detect a single gas or multiple gases.
sewage treatment facility
Sewage treatment facilities can produce many harmful gases, such as methane (combustible gas), hydrogen sulfide, carbon monoxide and carbon dioxide. These gases come from many sources, such as sewage tanks, pumping stations, aeration tanks, sludge digestion tanks, deodorization workshops and treatment workshops.
The main and secondary treatment processes, such as aeration and sludge digestion, are usually high-risk areas where biogas is produced. The biogas produced from sludge contains harmful substances such as methane, hydrogen sulfide and carbon dioxide. In addition to being extremely explosive, methane can also cause a decrease in oxygen concentration, thereby increasing the risk of suffocation. On the other hand, hydrogen sulfide has a special odor at a low concentration (0.0047ppm), which is easy to distinguish.
But when the concentration exceeds 150ppm, the human olfactory nerve will be damaged and cannot smell its odor, thus covering it. With its real existence, even if hydrogen sulfide reaches a lethal concentration of 800pm, workers will not be able to smell it, which is a fatal danger. Since biogas is very easy to burn, the biogas produced in the process of sludge digestion can be used for power generation. Therefore, if it leaks from the digester, it will be very dangerous and may cause an explosion.
in conclusion
Each gas has its own characteristics, so in any environment where the concentration of harmful gas is most likely to accumulate (or the concentration of gas is reduced, such as oxygen), fixed or portable gas detection equipment must be installed or worn. Like other industries, the water supply and sewage treatment industries are constantly looking for ways to reduce costs; however, there must be no reduction in employee safety. Gas accidents in these industries are not as simple as causing injuries-but death. As part of comprehensive safety regulations, gas detection must be a priority and must comply with industry best practice standards. However, in terms of measures to ensure the safety of employees, even in the most dangerous areas, there are still many unsatisfactory places, and there is still a long way to go.