Key points of the plan:

1. Real time detection of carbon monoxide concentration in the underground garage environment.

2. Centralized display and monitoring of concentration values in multiple fire compartments, with real-time display of concentration values.

3. The alarm value can be freely set, and the exhaust system can be automatically linked when the concentration value exceeds it.

According to tests, when the concentration of carbon monoxide in the air reaches 50ppm, healthy adults can withstand it for 8 hours; When reaching 200ppm, healthy adults may experience mild headaches and fatigue 2-3 hours later; When reaching 400ppm, healthy adults experience frontal pain within 1-2 hours, which is life-threatening after 3 hours; At 800ppm, healthy adults may experience dizziness and spasms within 45 minutes, lose consciousness within 2 hours, and die within 2-3 hours.

The production of carbon monoxide in underground garages mainly comes from car engines. When the engine is idling, due to insufficient combustion of gasoline, a large amount of CO containing exhaust gas will be produced. Underground parking lots are enclosed environments where vehicles frequently enter and exit, and the exhaust emissions are difficult to release. This can easily accumulate a large amount of CO gas, causing a pungent odor to pervade the parking lot and harming human health. Therefore, underground garages and parking lots should be equipped with air supply and exhaust systems to replace with fresh air.

Solution:

At present, there are two main purposes for installing a carbon monoxide detection system in underground garages:

1. Regular ventilation ensures that the concentration of carbon monoxide in the garage is below the hazardous level, which is a safety consideration.

2. Exhaust according to the concentration of carbon monoxide in the underground garage to avoid energy waste caused by excessive exhaust frequency, which is considered energy-saving.

The production of carbon monoxide in underground garages mainly comes from car engines. When the engine is idling, due to insufficient combustion of gasoline, a large amount of CO containing exhaust gas will be produced. Underground parking lots are enclosed environments where vehicles frequently enter and exit, and the exhaust emissions are difficult to release. This can easily accumulate a large amount of CO gas, causing a pungent odor to pervade the parking lot and harming human health. If the gas concentration is too high, it can even cause fires and explosions.

Under standard conditions, pure carbon monoxide (CO) is a colorless, odorless, and non irritating gas.

Carbon monoxide easily binds with hemoglobin to form carboxyhemoglobin, causing hemoglobin to lose its ability and function to carry oxygen, resulting in tissue asphyxia and, in severe cases, death.

Carbon monoxide has toxic effects on tissues and cells throughout the body, especially on the cerebral cortex.

CO is present in metallurgy, chemistry, graphite electrode manufacturing, household gas or coal stoves, and automobile exhaust.

Carbon monoxide is the most widely distributed and abundant pollutant in the atmosphere, and is also one of the important pollutants generated during combustion processes. The main source of CO in the atmosphere is the exhaust of internal combustion engines, followed by the combustion of fossil fuels in boilers.

CO is one of the non combustible products. If the combustion process can be well organized, that is, with sufficient oxygen, sufficient mixing, sufficiently high temperature, and long residence time, the intermediate product CO will eventually be burned to form CO? Or H? O. Therefore, controlling CO emissions is not an attempt to suppress its formation, but an effort to make it burn.

The carbon monoxide CO gas detector will detect the concentration of CO gas and transmit it to the control system. Once the CO concentration reaches the lower limit alarm value, the control system will issue an audible and visual alarm and output a low limit alarm signal to start the exhaust fan or monitor safety personnel to take more effective measures to reduce the concentration of CO gas on site.