Problems and Control Countermeasures of the hottes

2022-07-26
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Problems in filling liquid ammonia and control countermeasures

firstly, molten plastic is injected into the mold cavity. Recently, newspapers and magazines often publish that liquid ammonia filling leakage accidents have occurred in nitrogen fertilizer enterprises, and some have also caused casualties, which has to attract our attention. Liquid ammonia is the main product of small nitrogenous fertilizer enterprises. Its sales should be filled, that is, the liquid ammonia in the storage tank should be filled into special steel cylinders or tank cars respectively. The post for liquid ammonia filling is the liquid ammonia filling station. Because liquid ammonia is flammable, explosive and toxic, any careless filling may cause poisoning, fire and explosion accidents. It can be seen that the safety work of liquid ammonia filling station is the difficulty and key point of safety management of small nitrogen fertilizer enterprises

the color is measured by a rotating photoelectric encoder without distance. It has a pungent smell and is easily soluble in water. The solubility is 90g ammonia/100ml water. Molecular weight 17, relative density 0.6, melting point -77.7 ℃, boiling point -33.35 ℃, spontaneous combustion point 651.22 ℃, lower explosive limit 15.7% and upper explosive limit 27.4%. Ammonia is a flammable gas. Ammonia or the mixture of air and ammonia can explode in case of fire, and release toxic smoke of ammonia and nitrogen oxides in case of heat

    2. The main ways of ammonia invading human body are respiratory tract inhalation and skin invasion. Low concentration of ammonia can stimulate the mucosa, while high concentration of ammonia can cause tissue dissolution and necrosis. Ammonia causes the following characteristics after human poisoning:

mild poisoning causes tears, sore throat, hoarseness, cough, expectoration, etc; Congestion and edema of conjunctiva, nasal mucosa and pharynx; The chest X-ray signs were consistent with bronchitis or peribronchitis

the above symptoms in the patients with moderate poisoning are aggravated, and dyspnea and cyanosis occur; Chest X-ray signs were consistent with pneumonia or interstitial pneumonia

patients with severe poisoning may have toxic pulmonary edema, or respiratory distress syndrome, severe cough, lots of pink foam sputum, respiratory distress, delirium, coma, shock, etc. Laryngeal edema or bronchial mucosal necrosis, exfoliation and asphyxia may occur

liquid ammonia or high concentration ammonia may cause eye burns; Liquid ammonia can cause skin burns

possible risk factors (III)

1 Process equipment conditions

see Figure 1 for the process flow diagram of liquid ammonia filling station:

Figure 1

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