【 Harm and Prevention of Radio Frequency Electromagnetic Field 】

Radio frequency electromagnetic field is the electromagnetic field generated around the conductor of radio frequency current, which refers to alternating current that oscillates more than 654.38+ million times per second. The radiation generated by this electromagnetic field is generally relatively large, so it has a great influence on the human body. It is commonly used in petrochemical working environment, especially in petrochemical machinery manufacturing process, such as high-frequency quenching, high-frequency welding, high-frequency smelting, sub-arc high-frequency welding and so on. It may also appear in the process of plastic processing, such as the application of microwave sealing film technology. Radio frequency electromagnetic fields will also do harm to the health of petrochemical workers, so we should pay attention to them in our work and take measures to prevent them.

1. Harm of radio frequency electromagnetic field to human body

When the human body is in the radio frequency electromagnetic field environment, it is easy to have symptoms related to neurasthenia, such as dizziness, head swelling, insomnia, dreaminess, fatigue, memory loss, palpitation and so on. There may also be limb pain, loss of appetite, hair loss, weight loss, hyperhidrosis, etc. For female workers, it may also lead to menstrual disorders; Microwave in RF electromagnetic field can also lead to too fast or too slow heart rate, decrease or increase of blood pressure, decrease or increase of white blood cells, and even damage to eyes.

2. Prevention of radio frequency electromagnetic field hazards

(1) Prevent the spread of electromagnetic radiation. Electric field shielding technology or magnetic field shielding technology can be used to limit electromagnetic energy in a certain space and prevent the spread of electromagnetic radiation. For example, a shield composed of a benign conductor such as a metal plate or a metal mesh or a metal with good conductivity can be fully contacted with the earth, so that the electromagnetic induction of the shield caused by electromagnetic radiation flows into the earth through the ground wire, thereby reducing radiation.

(2) reduce contact. We can operate the operation site remotely or automatically by reforming the process or introducing advanced equipment, thus reducing the exposure of employees to RF electromagnetic radiation. In addition, plastics, rubber, ceramics, graphite and other radiation-absorbing materials can be arranged around the electromagnetic field, and some high-frequency electromagnetic radiation can be absorbed by these materials, which can also reduce the harm of RF electromagnetic fields to practitioners.

(3) Strengthen personal protective measures. For petrochemical workers who often work in electromagnetic field environment, it is very necessary to do personal protection. For example, you can wear protective clothing, protective glasses or protective helmet. Protective clothing is made of metal wire cloth, metal film cloth or infiltrated metal cloth, which has obvious protective effect; Protective glasses are made by coating an extremely thin and transparent layer of tin powder on the outer surface of optical glass sheet by evaporation or spraying technology, and the protective effect is also very good; The protective helmet is made of copper with small mesh, which can be divided into fully enclosed and semi-enclosed, and the protective effect is also very reliable.