Ammonia (NH3), an inorganic compound, is colorless and has a pungent odor. It is easily soluble in water. Ammonium salt can be obtained by the action of ammonia and acid. Ammonia is mainly used as refrigerant and to prepare ammonium salt, nitrogen fertilizer, compound fertilizer, nitric acid, ammonium salt, soda ash, etc. The ammonia in the indoor air mainly comes from the concrete additives used in building construction. The additives contain a large amount of ammonia substances. Through the use of hand-held ammonia alarm, it is known that it is reduced to ammonia and released in the wall with the change of temperature, humidity and other environmental factors.
Poisoning manifestations: rhinitis, pharyngitis, sore throat, hoarseness, itchy eyes, dry eyes, sneezing, dry throat, runny nose, which can induce convulsions, convulsions, drowsiness, coma and other conscious disorders. It can burn the skin, eyes and mucous membranes of respiratory organs. If people inhale too much, it can cause lung swelling. Individual patients inhale very strong ammonia, which can cause respiratory and cardiac arrest and even death.
1、 Measures to prevent ammonia poisoning:
1. Install and use ammonia alarm and gas ammonia leakage alarm on site, and timely alarm whether it reaches harmful concentration;
2. Corrosion resistant work clothes, alkali resistant gloves, glasses, rubber shoes and gas masks shall be selected during work, and the gas masks shall be checked regularly to prevent failure;
3. When using ammonia water for operation, keep clean water with you in case; During the transportation of ammonia, 3% boric acid solution shall be kept with you for emergency flushing; Wear goggles when preparing ammonia with a certain concentration; When using ammonia, the operator should be upwind to prevent ammonia from irritating the face; It is forbidden to rub your eyes with your hands during operation, and wash your hands after operation;
4. Provide good ventilation and exhaust facilities and appropriate explosion-proof and fire-extinguishing devices;
5. Eating, smoking, open fire and sparks are prohibited in the workplace;
6. Wear air respirator during emergency rescue;
2、 Installation and requirements of ammonia detector
1. The density of ammonia gas is less than that of air. The detector shall be installed 0.5m-2m above the leakage point, and the sensor part shall be downward.
2. Do not install the instrument in the following positions:
① Places directly affected by steam and oil fume;
② Air supply port, ventilation fan, door and other places with large air flow;
③ Where there are many water vapor and water droplets (relative humidity: ≥ 90%);
④ Where the temperature is below - 30 ℃ or above 50 ℃;
⑤ Places with strong electromagnetic;