Explosion-proof human body static equipment is what kind of static electricity is released
First, the human body electrostatic discharge device releases several forms of static electricity:
1, contact with electricity
Contact electrification can occur at the solid-solid, liquid-liquid or solid-liquid interface. When solid particles or droplets are suspended in the gas, the solid particles or droplets can be charged by contact so that the gas can carry an electrostatic charge.
2, breaking power
The solidification and solidification of the liquid splitting process are all broken and electrified.
3, induction power
The conductor can be charged by one or some of the charged bodies around it. The live conductor is insulated from the surrounding and will have a potential, which is called induction. The conductor has a potential, plus it has a separate charge. Therefore, the conductor can be electrostatically discharged.
4, charge migration
Condition: A charged body is in contact with a non-charged body, and charges are distributed between them according to the degree of their respective conductivity, which is charge transfer. When charged droplets or dust impinge on a solid (such as electrostatic precipitator), a strong charge transfer occurs. Similar charge migration occurs when gas ions are incident on an initially uncharged object.
Second, the accumulation and discharge of static electricity:
After the insulator and the insulated conductor are charged, the charge is held on the insulator due to high resistance, both of which are called electrostatic products.
Gather.
Electrostatic discharge form:
1, spark discharge
A spark discharge is a discharge that occurs between liquid or solid conductors. It is characterized by a rapid discharge and a loud popping sound.
2, corona discharge
Corona discharge occurs when a tip having a small radius of curvature exists on the conductor. The feature is accompanied by a "beep" sound, sometimes with a faint glow.
3, brush discharge
Brush-shaped discharge occurs between a conductor and a non-conductor and is a discharge that emits a short spark from many points on the non-conductor.
4, static ignition
Whether electrostatic discharge can ignite a flammable or explosive mixture depends on the composition and temperature of the mixture, the energy of the discharge, and the distribution of energy over time and the distribution in space. The minimum ignition energy of organic vapors and hydrocarbon gases is between several 0.01 and 0.1 mJ. Acetone is 115 mJ
The isopropanate was 0.65 mJ.
Third, the basic measures to prevent electrostatic hazards: reduce friction and electrification 2. Electrostatic grounding: the role is to discharge the charge on the conductor, so that the conductor and the earth are equipotential, so that the potential difference between the conductors is zero. 3. Increase the humidity of the air When the relative humidity of the air is above 65-70%, a very thin water film will form on the surface of the object. The water film can dissolve the CO2 in the air, so that the surface resistivity is greatly reduced, and the static charge is less likely to accumulate. If the relative humidity of the surrounding air drops to 40 to 50%, the static electricity is not easily dissipated, and it is possible to form a high potential.
Fourth, the conditions of electrostatic fire: the surrounding and space must have flammable substances; have the conditions to generate and accumulate static electricity; high enough electrostatic potential to constitute the discharge condition; the energy of electrostatic discharge is greater than or equal to the minimum ignition energy of combustibles.