Harm and prevention of toxic and harmful gases


Many industrial processes have influential gases, such […]

Many industrial processes have influential gases, such as electric welding, electroplating, exercise, chemicals, and petroleum. These gases are corrosive and can form acute poisoning through the respiratory tract into the body. The common feature of the toxic effect of the influential gas on the body is that it has different degrees of influence on the eyes, respiratory mucosa and skin. It is generally based on partial hazards, but it can also cause systemic reactions. "Tri-acid" vapor can affect the respiratory mucosa and cause skin burns; touching the low-concentration acid mist for a long time can also affect the teeth and cause dental erosion.

Chlorine, ammonia, sulfur dioxide, sulfur trioxide and the like are highly water-soluble, and it is easy to cause harmful effects when encountering a wetted part. Such as inhalation of these gases, dissolved in the upper respiratory tract mucosa, directly affecting the mucosa, causing congestion, edema, and secretion of the upper respiratory tract mucosa, the onset of chemical inflammation, showing symptoms such as salivation, itchy throat, cough. Nitrogen oxides, phosgene, etc. have low water solubility. When they pass through the upper respiratory tract mucosa, they rarely cause hydrolysis, so the mucosal effect is mild; but the bronchial and alveolar can be deepened continuously, and the effect on the mucous membrane is gradually exerted on the lung tissue. The attack has a strong influence and corrosive effect, and pulmonary edema is present when severe.

The main points of prevention of influencing gases are to eliminate accidents, avoid running, taking, dripping, leaking, and make exhaust gas recovery and comprehensive utilization. The automation, mechanization and pipeline of the production process adopt automatic control skills, automatic conditioning to maintain normal operating conditions, avoiding incidents; improving the tightness of equipment and avoiding corrosion and cracking of metal equipment; selecting appropriate ventilation methods according to the characteristics of the production process. Strengthen personal protection, many people should wear corrosion-resistant protective equipment such as polyvinyl chloride, rubber products, rubber gloves, protective glasses, protective rubber shoes, etc. when wearing corrosive liquid poisons such as acid and alkali; wear respirator or protective mask; Skin protective ointment. Strengthen health surveillance, do pre-job and regular physical examination, and find allergic asthma, allergic skin disease or eczema in skin exposed parts, slow respiratory diseases such as eyes and nose, throat, trachea, and tuberculosis (including stable) Heart disease patients should not do the work of touching the influencing gas.