Autumn is dry
It is very easy to generate static electricity
It is necessary to focus on preventing electrostatic accidents
Let's take a look at the relevant safety knowledge!
↓↓↓
01
Hazards of static electricity
Explosions and fires
Explosions and fires are the biggest hazards posed by static electricity. Although the electrostatic energy is not large, it is prone to discharge due to its high voltage. When a charged body is in close proximity to an uncharged or low-electrostatic object, a spark discharge occurs if the potential difference reaches more than 300V.
The spark energy of electrostatic discharge will burn or explode immediately if it has reached the minimum ignition energy of the surrounding combustibles and the concentration of the combustibles in the air has reached the explosion limit.
Electrostatic shock is harmful to the human body
Electrostatic shock only occurs instantly, and the current passing through the human body is an instantaneous impulse current, and its harm is mainly manifested in three aspects: direct injury, secondary injury, and mental stress. When the human body is subjected to electric shock, it will be nervous, and the consequences such as misoperation, falling from a height, falling or touching machinery will cause injury.
Hazards of static electricity, production environment, etc
Static electricity can cause powder deposition in production, block pipelines, sieve holes, etc., resulting in poor transportation and causing system pressure holding, and overpressure can lead to equipment rupture. In the process of storing and transporting plastics and other products, electrostatic discharge will lead to melting, bonding, discoloration, and even decomposition and deterioration of products. Electrostatic discharge energy can cause damage to silicon components in computers, production control instruments, and safety control systems, causing misoperation and causing accidents.
02
Protection against static electricity
Anti-static in life
Wear more silk cotton and less chemical fiber, and pay attention to washing and storage
In autumn and winter, try to choose soft and smooth silk cotton clothes, and wear less chemical fiber clothes that are easy to generate static electricity. For common sweaters, knitwear and other clothing, you can soak it with softener in advance when washing, or dilute the softener with water and spray it on the clothes, which can make the clothes soft, thereby effectively reducing the static electricity caused by friction.
When storing clothes, putting newspaper between them, or putting cotton clothes between woven clothes, can also prevent static electricity from friction between clothes.
Wash your hair regularly and take care of it frequently, and stay away from alcoholic products
Dry weather in autumn can dry out hair and cause dandruff. Dirt-clinged hair is a breeding ground for static electricity, so be sure to wash your hair frequently, bathe frequently, change your clothes frequently, and take care of it frequently. In addition, the evaporation of alcohol can make hair drier, so try not to use alcohol-based products when styling your hair. In addition, choose a comb made of wood or bone to avoid static electricity when combing your hair.
Wash your hands frequently to remove static electricity and moisturize with various lotions
The best way for the human body to do this is to wash your hands and keep them moist, so that the electrostatic charge on the surface of the skin can be released from the water. You can also use hand creams, face creams, and body lotions that have a good moisturizing effect.
Eat a healthy diet and drink plenty of water, vegetables and fruits
Eating more acidic foods such as vegetables, fruits, and yogurt, drinking plenty of water, and supplementing calcium and vitamin C can reduce the effects of static electricity.
The room should be ventilated every day, and flowers and plants should be used to help
Maintain indoor ventilation for a period of time every day, preferably using an air humidifier, and placing some flowers and plants indoors.
The door is equipped to open the car interior and choose the right material
For those who have a car, driving in winter, you can contact the car door through your clothes to drain the static electricity on your body before opening the door, and at the same time pay attention to the moisture in the car. When choosing accessories such as seat covers, cushions and floor cushions, it is best to use genuine leather or cotton products.
Anti-static at gas stations
1. Do not use mobile phones and other electrical equipment when refueling, and do not pat clothes, comb hair with chemical fiber combs and other unsafe behaviors that are easy to generate static electricity.
2. Discharge before refueling. The self-service fuel dispenser in the gas station itself is designed to release static electricity, and when refueling, touch the body of the fuel dispenser first to release the static electricity on the body.
3. Do not return to the car during the refueling process to prevent static electricity from getting on again.
4. Pay attention to the use of gas guns. Before refueling, the refueling gun can be touched lightly at the mouth of the fuel tank to eliminate static electricity, and the fuel gun can be as deep as possible into the mouth of the fuel tank when refueling, which can reduce the volatilization of gasoline vapor, which is equivalent to reducing the ignition medium from the source. In case of fire at the nozzle, do not panic, stop the refueling operation immediately, and then move the refueling nozzle away from the oil source, and quickly extinguish the fire with a fire extinguisher.
Anti-static for businesses
Process control method
It is to take measures in the process flow, equipment structure, material selection and operation management to achieve the purpose of limiting the generation of static electricity or controlling the accumulation of static electricity. Here's how:
Limit the conveying speed
Reducing work parameters such as friction velocity in liquid transport or the flow rate of liquid material in the pipeline limits the generation of static electricity.
Accelerates the escape of electrostatic charges
Including the use of buffers, when transporting liquid materials, before the charged liquid enters the storage tank through the pipeline, it first enters the buffer for a period of time, so that most of the charge escapes during this time, thereby greatly reducing the charge brought into the storage tank; The liquid injected into the storage tank should be allowed to stand for a period of time before inspection, sampling and other work, so that the accumulated charge can be concentrated on the wall and liquid level and leaked into the earth; To eliminate impurities, petroleum products should avoid mixing with water, air and other impurities and oil products and between different oil products in the production and transportation.
Eliminate additional sources of static electricity
For example, the splashing of the liquid flow, the agitation of the water at the bottom of the container by the injection stream, the inclusion of air or bubbles in the liquid or powder, the impact of dust in the hopper or silo, the mixing and agitation of the liquid or powder, etc.
Arrange the order of input of materials appropriately
In some mixing processes, proper feeding sequences can reduce the risk of static electricity.
Choose the right materials to eliminate static electricity
Electrostatic shielding method
Electrostatic shielding, that is, the shielding conductor is placed close to the electrostatic body to reduce the danger of electrostatic discharge and prevent the effect of electrostatic induction. It can be shielded as a whole, or as needed, it can be partially shielded, and it can be used as a mesh shield or as a plate shield. However, it is important to note that shielding does not eliminate electrostatic charges.
Electrostatic leakage method
The so-called leakage is to vent static electricity. Leakage methods include grounding, humidification, adding antistatic agents, and applying conductive coatings.
Static Eliminator
Static eliminators are devices that effectively prevent insulators from being electrified, and are divided into three types: radiation, external power supply, and self-induction.