2.2 Design Considerations for ammonia / water system
2.2.1 security properties of ammonia and
ammonia are naturally occurring substances that are produced and used in large quantities. (In the US alone, 20 million tons of ammonia IPCS Health and Public Safety. Org WHO chemical safety program, Geneva, 1990), to agriculture as a fertilizer and as a source for fiber and plastic explosives. .consequently It is shipped in bulk by rail and boat. Ammonia is used as a cleaning and de - adjust agents and additives. Ammonia is a colorless gas of density flow at room temperature with a pungent odor. It has a molecular weight of 17.03, and is lighter than air and atmospheric conditions. It can be stored and transported as a liquid under pressure of 1 MPa 25 0c focus of ammonia and 11.3 MPa 132.30c critical density is 235 kg / m3, since ammonia dissolved in creating ion NH4 + and OH. - responded quickly with mucous membranes. But it does not get absorbed through the skin. Humans can not smell in the concentration of PPMS very little about 50 ppm is also the concentration is 25 ppm () exposure in the long run will be limited from the health point of view (IPCS 1990, ammonia and health. Safety, Geneva) at dosages higher exposure to ammonia can be lethal. Ammonia is flammable and explosive in the range 16-25% (IPCS 1990, ammonia, health and safety, guide, Thailand. Org WHO. Program on Chemical Safety, Geneva), a strong odor of ammonia in the air can. seen as an asset It is shocking themselves. Even a small leak in the system will be easy and so it is important incentive exists for the repair and maintenance of compliance. How to check for leaks is to use a wet paper indicator will quickly change color when exposed to the air with a few parts per million of ammonia. However, traditional leak detection equipment such as soap (or bubble) solution does not work since ammonia dissolved in water without creating bubbles.
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