What are the dangers of static electricity?

Static electricity has many hazards. The first hazard comes from the interaction of charged objects. When the aircraft body rubs against air, water vapor, dust and other particles, the aircraft will be charged. If no measures are taken, it will seriously interfere with the normal operation of the aircraft's radio equipment and make the aircraft deaf and blind; in the printing factory, paper pages The static electricity between them will cause the paper pages to stick together and be difficult to separate, causing trouble for printing; in pharmaceutical factories. Because static electricity attracts dust, the medicine will not reach the standard purity; when the TV is played, the static electricity on the screen surface can easily absorb dust and oil, forming a film of dust, which will reduce the clarity and brightness of the image; just on blended clothes Dust that is common but difficult to dust off is also caused by static electricity. The second major hazard of static electricity is the possibility of explosions caused by static sparks igniting certain flammable objects. In the dark night, when people take off nylon and woolen clothes, they will emit sparks and "bah" sounds, which are basically harmless to the human body. However, on the operating table, electric sparks can cause the explosion of anesthetics, injuring doctors and patients; in coal mines, they can cause gas explosions, which can lead to the death and injury of workers and the scrapping of mines. In short, electrostatic hazards are caused by the use of electricity and static sparks. The most serious electrostatic hazards, electrostatic discharge, cause fires and explosions of combustibles. It is often said that measures to nip problems in the bud and prevent the generation of static electricity are generally to reduce the flow rate and flow rate, modify process links that generate strong electricity, and use equipment and materials that generate less electricity. The simplest and most reliable way is to ground the device with a wire, which can lead the charge to the earth and avoid static electricity accumulation. Careful passengers will probably find that discharge brushes are installed on the wingtips on both sides of the aircraft and at the tail of the aircraft. When the aircraft lands, in order to prevent passengers from being shocked when flying off, most aircraft landing gears use special grounding tires or grounding wires; To discharge the static charge generated by the aircraft in the air. We often see an iron chain trailing from the rear of a tanker truck, which is the grounding wire of the vehicle. Appropriately increasing the humidity of the working environment allows charges to be released at any time, which can also effectively eliminate static electricity. This is why it is not easy to conduct static electricity tests in humid weather. The antistatic agent studied by scientific researchers can effectively eliminate static electricity inside the insulator. However, everything has two sides. For the hidden troublemaker that is static electricity. As long as you understand its temperament and make use of its strengths and avoid its weaknesses, you can make it serve mankind. For example, electrostatic printing, electrostatic spraying, electrostatic flocking, electrostatic dust removal and Hong Kong electrostatic sorting technology have been widely used in industrial production and life. Static electricity has also begun to show its talents in many aspects such as desalination of seawater, spraying pesticides, artificial rainfall, low-temperature freezing, etc. Even electrostatic devices such as electrostatic feeders are installed on spacecraft. [2]

The accumulation of static electricity is inevitable. Static electricity can burn people's skin when severe. Excessive electromagnetic waves and harmful rays from various electrical appliances can interfere with the human endocrine system. With the improvement of people's living standards and the enhancement of environmental protection awareness, the application scope of anti-static metal cloth is also expanding day by day. Anti-static metal cloth clothing such as professional clothing, work clothes, and protective clothing are becoming increasingly popular, and anti-static metal cloth is also becoming more and more popular. Therefore, it suddenly emerged and became a star product in the fabric market. The latest market trends show that anti-static fabrics in many developed countries have been used in the field of home textiles. For example, anti-static metal fabrics are used for bed covers, paving, and mats. The demand is huge and orders continue to be placed. However, manufacturers must meet three conditions. First, the product must meet the importer’s index requirements. Second, post-processing must pass the test. Third, it must be woven on a wide loom. Most of the orders are from Japan and Europe. There is also a certain sales volume in the northern domestic market. There is no doubt that the market prospect of anti-static metal cloth is very broad.

Hazards in industry

The generation of static electricity is inevitable in industrial production, and the harm caused by it can be mainly attributed to the following two mechanisms:

One: Hazards caused by electrostatic discharge (ESD):

(1) Causes malfunction or malfunction of electronic equipment, causing electromagnetic interference.

(2) Breakdown of integrated circuits and precision electronic components, or aging of components, reducing production yield.

(3) High-voltage electrostatic discharge causes electric shock and endangers personal safety.

(4) Explosions and fires are easily caused in production sites with many flammable and explosive materials or dust and oil mist.

Second, the harm caused by electrostatic attraction (ESA):

(1) Electronic industry: adsorbing dust, causing pollution of integrated circuits and semiconductor components, greatly reducing the yield.

(2) Film and plastic industry: The film or film will be unevenly wound; the film and CD plastic tray will be contaminated with dust, affecting the quality.

(3) Paper printing industry: uneven paper winding, inaccurate overprinting, serious dirt absorption, and even paper sticking, affecting production.

(4) Textile industry: causing hazards such as fluttering threads, tangled ends, and yarn tangles.

The harm of static electricity is obvious to all, and now more and more manufacturers have begun to implement various degrees of anti-static measures and projects. However, it is important to realize that to complete and effective anti-static projects, corresponding countermeasures must be formulated according to the actual conditions of different enterprises and different working objects. Anti-static measures should be systematic and comprehensive, otherwise, they may achieve half the result with twice the result, or even cause destructive side effects.

Hazards to pregnant women

Persistent static electricity can cause the pH value of human blood to increase, increase calcium excretion in urine, and decrease blood calcium, which is the most harmful to the health of pregnant women. , Static electricity can cause the level of progesterone in pregnant women to drop, making them prone to fatigue, irritability and headaches, so it is necessary to take appropriate precautions.

Measures for pregnant women to prevent static electricity

Pregnant women can prevent static electricity "harassment" by planting more suitable flowers and plants indoors, or choosing to use a suitable humidifier to keep the living environment appropriate. of humidity. Clothes made of wool or chemical fiber can easily generate static electricity, so pregnant women are advised to prepare more pure cotton clothes.

Avoid prolonged contact with the computer, open the window when watching TV or the computer, wash your hands and face after watching, and use skin care products with good moisturizing properties to ensure the moisture of the skin. For pregnant women, the accumulation of static electricity in the body causes the blood pH to be alkaline. Therefore, it is necessary to appropriately increase the intake of vitamins C, A, E and acidic foods, such as carrots, cabbage, and tomatoes, which can increase the acidity of the blood and maintain The body's normal electrolyte balance.

The harm of static electricity to babies

First of all, it will increase the alkaline concentration of the blood and reduce the calcium, which is very important for infants and young children who are in the growth and development period. It’s really taboo. In addition, a large amount of electrostatically adsorbed dust contains a variety of viruses, bacteria and harmful substances, which can cause spots and inflammation on the baby's skin. Babies with weak resistance may even cause bronchitis, asthma, arrhythmia, etc.

Hazards to the human body

To the skin

Long-term exposure to TVs, computers, microwave ovens, etc. may cause enlarged pores, dry skin, Symptoms such as erythema and skin itching. Office white-collar workers who use computers every day have a much higher incidence of facial diseases such as facial erythema and pigmentation than those who do not use computers. This is because the static electricity generated by the computer screen attracts a large amount of suspended dust, irritating the face. This is especially true for people with sensitive skin.

To the heart

In clinical practice, when some people are critically ill, an electric shock may be used to save the patient's life, because electric shock to the heart can defibrillate. It can be seen that a certain amount of current can save people, but normal people do not need current. If the static electricity carried by the human body is thousands of volts or even tens of thousands of volts, it will seriously interfere with or even change the inherent potential difference in the human body, especially affecting the normal work of the heart, and may cause abnormal heartbeats and premature heart beats. One-third of cardiovascular diseases in winter are related to static electricity. Nine out of ten people with heart disease and neurasthenia whose causes cannot be found are caused by long-term interference from static electricity.

On the brain

Medical experts explain: Static electricity generated by dryness does have an impact on the brain. It can cause abnormal current conduction in nerve cell membranes, affect the central nervous system, and make people feel fatigued. , irritability, insomnia, headache.

Skin diseases

It is a common thing for the human body to be electrified. From the perspective of modern science, it is not a bad thing for the human body to be electrified. In the past, people were afraid of electricity. "Electricity" was so terrifying in people's minds. Especially when I see thunder and lightning, I get frightened and run away, fearing that I have been struck by lightning. It's no wonder that it is so scary for people who have never been exposed to the word "electricity". However, there is a certain scientific reason for people's fear. Once a strong electric charge flows through a person's body, some people will be burned in mild cases, and those in severe cases will die. Its powerful positive and negative charge discharge, instant arc flash and strong lightning shock wave are really deafening.

This powerful electric discharge has brought many major disasters to nature and mankind. Buildings were destroyed and tall trees were split in half. And every summer, how many people and animals are struck and killed by lightning. The direct economic losses caused by the charge discharge of charged cumulonimbus clouds in various regions around the world are as high as hundreds of millions of dollars every year.

Let’s talk about the ordinary "electricity" phenomenon. In daily life, when we use a comb to comb our hair, we often find that the hair forms a ray shape under the action of high-voltage electrostatic field force. When we take off our clothes every night, we often find a flash effect and a crackling flashing sound. Sometimes, when we touch the fur of a "cat or dog", you will receive a small "electric shock". Also, if you comb your hair with a comb, you can attract scraps of paper. This is what we often call the "electricity" phenomenon. There are many kinds of objects in motion that can generate an electric field effect with positive and negative charges on both ends. When the charge accumulates to a high voltage of tens of thousands of volts, it will discharge charges to other objects around it. This is the object. The frictional electrification state.

"Lightning" is a discharge mechanism in which the insulator between positive and negative electric fields with high charge is broken down. When powerful positive and negative charged particles collide with each other, annihilation occurs instantly. The expansion effect of light radiation and high-temperature gas will be formed in an instant. This instantaneous rapid expansion of gas will roar with the air to form a huge sound. This is the process responsible for the formation of thunder and lightning in nature.

There must be some mystery about the impact of static electricity on human skin diseases. Here we will analyze its intrinsic functions together. The human body is a combination of cells composed of large chemical molecular formulas. Cells are composed of space material particles. The movement of material particles forms the electric field force energy of the world. The particles with different charges create the movement mechanism of space materials. The electrical phenomenon of the human body is a masterpiece of nature, and the conversion of electric fields and magnetic fields is everywhere. A sick human body shows changes in cell membrane potential, while a healthy human body shows the potential balance of human cells. The stimulation of an external electric field improves the balance of point potentials between cell molecules in pathological conditions, thereby allowing the human body to operate in a healthy state.

The clothes that humans usually wear are divided into different fiber products, and the charge amounts of plant cells, animal fur fiber tissues and chemical fibers in nature are different. In addition, chemical fibers and animal hair have the largest electrostatic charges. Generally speaking, the clothes we humans wear are made of a wide variety of fibers, mainly animal fur and chemical fibers. This is also the main reason why the human body is charged. The amount of charge carried by the material components of different fiber tissues is also different. The cause of the charge carried by clothes is mainly caused by the frictional movement between material materials. When human clothing carries high potential, it will form an electrostatic potential difference of several thousand volts or higher between human skin and clothing. Under the action of this electric field force, the surface of human skin cells is always in a high voltage field. under the influence of force. However, the mechanical effect of this high potential field can lead to the recovery of normal functions of diseased cells. This is only a scientific reasoning and is well-founded. The charging phenomenon of the human body has been discovered long ago. As clothes made of chemical fibers and wool become more and more common, the electrostatic potential carried by the human body will also increase.

Through investigation, the greater the amount of electrostatic charge carried on the surface of the human body, the smaller the chance of suffering from skin diseases. There is a rumor among the people in our country: "An electric shock will ensure that you are not sick." The meaning of this sentence is: "If the human body is shocked with an electric shock, you will get rid of many diseases." However, this The sentence is also very scientific. For example, when the human body is subjected to a momentary stimulation of high electric potential, it can form a momentary state of mental tension, causing the human body to form an overall twitch in an instant. Because the information transmission of the human body's neural network is caused by the electron flow conduction of the potential between cell molecules, it can improve the potential balance between healthy and pathological cells, so that the pathological cells can be recovered in time.

Why do you say this? In the private sector, I am afraid that no one has yet studied the problem of weak electric shocks suffered by the human body and whether electric shocks can have any mechanistic effects on pathological cells of the human body. However, this is also a coincidental discovery. There is a comrade who has a diseased skin cell in some parts of his body, which is also seasonal. Every autumn, winter and spring, skin diseases similar to yellow water sores will occur locally. , piece by piece.

Once summer comes, this skin disease will naturally get better, but in other seasons, patches of yellow water sores will appear on his head, forehead and back. This state has lasted for decades, and these wards are itchy from time to time, and there is also a very thin layer of scabs. When you scratch it with your hands, the scab layer will be scratched off, and then it will disappear. There will be sticky discharge. From a medical point of view, this is a seasonal skin disease. Because the climate in autumn, winter and spring is dry, sweat secretion is less, and the hygiene conditions are not very good, so skin diseases are easy to occur.

In the past, this colleague rarely wore close-fitting chemical fiber clothing. Due to the continuous research and development of new varieties in the clothing industry, a kind of thermal underwear suitable for winter has been produced. This kind of underwear is a white single-layer shirt that men usually wear in summer. Later, the manufacturer added a furry lining made of chemical fiber material to this underwear. Since most modern clothing is made of chemical fiber materials, it is easy to generate frictional electricity between clothing. Whenever you take off your clothes to sleep, you will feel a high-voltage electrostatic field stimulating the skin. At this time, the body will be numb from the electricity, and spark discharge will occur between the clothes and the human body. Normally, he didn't pay much attention to it, but accidentally, he discovered that the skin diseases on his body were no longer there, and he felt strange for a moment. It was later discovered that the fluff-lined underwear he wore had an effect.

This discovery is not trivial. Static electricity itself is not a good thing, but it still has certain medical effects on human skin diseases. Usually, it is a very bad thing for the clothes worn by the human body to be charged. People will add static elimination liquid to the water to remove the static reaction on the clothes. However, if the human body does not have abnormal skin diseases, you should remove the static electricity on the clothes to prevent the many inconveniences caused by static electricity to the human body. If your skin is not very good, it is recommended that you do not remove static electricity from your clothes for the time being, or add some clothes made of wool, chemical fiber and other materials that are prone to static electricity.

In nature, it is difficult for the human body to be in a high-voltage electrostatic field, but power plants deliver high-voltage alternating current, which does not form an electrostatic field force. High-voltage alternating current will also produce charge discharge, but compared with the discharge of high-voltage static charges, there are still different forms. The discharge point arc of high-voltage alternating current is a continuous and uninterrupted linear breakdown of insulation, while the electrostatic discharge is an instantaneous breakdown of insulation. The arc line is intermittent and discontinuous, and is accompanied by huge air vibration sound waves. , which is the thunder we usually hear.

Why does AC high-voltage discharge have a continuous arc insulation breakdown state? Because under the AC high potential field, the space medium will form an alternating conversion form of charge, which is also called capacitance. Therefore, the capacitor is an electrical conduction device for alternating current. The voltage polarity at the two endpoints of the AC electric field will continuously change over time. When the withstand voltage value of the space insulator reaches its breakdown voltage, the space insulator will be broken down by the charges and conduct, and will be in contact with the AC high-voltage electric field. When the insulating material breaks down, a continuous arc conduction state is formed. At this time, a strong and continuous short-circuit current will be formed in the circuit. High-voltage electrostatic field discharge is an instantaneous and intermittent breakdown discharge of a large amount of charge on the medium, which is the "pop" discharge sound that people hear. Lightning is caused by the discharge of this kind of strong electric charge and high electric field, that is, the accumulation and release of charge. The static electricity in the waistband of polyester cotton sweaters is said to have a certain effect on rheumatoid arthritis. However, after a large amount of dust adsorbed by synthetic fibers due to static electricity is inhaled into the respiratory tract, it may cause bronchial asthma patients to have asthma attacks at night. Some people with premature systole and premature beats are not found to have heart disease, nor are they smoking, drinking or taking drugs, etc. that cause arrhythmias. However, it is found that many of them are accustomed to wearing chemical fiber clothes. These people are allergic to chemical fibers and release histamine substances in their bodies, which can cause arrhythmia.

If that day, we humans create a space high-voltage electrostatic field area that can suit different groups of people, so that people can enjoy the life extension and disease treatment brought by high-voltage electrostatic fields. By then, static electricity will benefit mankind, and people will no longer be afraid of arc flashes produced by high-voltage electrostatic fields.