What is the high temperature hazard?

Because there are productive heat sources in the workplaces of industrial enterprises and service industries, when the actual outdoor temperature reaches the calculated outdoor ventilation design temperature in summer in this area, the operation where the workplace temperature is more than 2℃ higher than the outdoor temperature is called high temperature operation. There are high-temperature operations in almost all industries of industrial production, such as steelmaking, ironmaking, paper making, plastic production and cement production. When working at high temperature, a series of physiological function changes will occur in human body. These changes are adaptive responses within a certain range, but if they exceed the range, they will have adverse effects and even cause lesions. The influence of 1. on the circulatory system. When working at high temperature, the blood vessels of the skin dilate, and a lot of sweating makes the blood concentrate, which leads to increased heart activity, accelerated heartbeat, increased blood pressure and increased cardiovascular burden. 2. Effect on digestive system. High temperature will inhibit saliva secretion. The secretion of gastric juice decreases, gastric peristalsis slows down, causing loss of appetite; A lot of sweating and chloride loss reduce the acidity of gastric juice, which is easy to cause indigestion. In addition, high temperature will slow down the movement of small intestine and form other gastrointestinal diseases. 3. Influence on urinary system. At high temperature, most body fluids are excreted by sweat glands, and the amount of water and salt excreted by kidneys is greatly reduced, which makes urine concentrated and the burden on kidneys increases. 4. Influence on nervous system. Under the action of high temperature and thermal radiation, the working ability of muscles, the accuracy and coordination of movements, the reaction speed and attention of the brain are reduced.