Principle of static electricity

When looking closely, you can see that all matter is composed of atoms. An atom has protons and electrons that are in electrical balance. Electrons may become separated from or attached to the atom with a small force.

Disruption of the balance between protons and electrons leads to static electricity. Charge generation will occur when two surfaces in contact are rubbed or separated. One surface loses electrons and becomes positively charged while the other surface gains the same electrons and becomes negatively charged.

Electrostatic charges generated during powder handling often adversely influence process performance. In cases where significant charges are present, accidental discharge of the accumulated static charges may cause sparks, fires, even explosions, affecting process performance and causing significant safety concerns. Powder processing operations can generate vast quantities of electrostatic charge via the movement of powder.

Electrostatic charging is a complicated phenomenon, especially when handling powder mixtures. The standard method of charging on powder processing operations is due to the contact and separation of the powder with processing equipment, the powder particles colliding between themselves (or both).

For instance, the charged particles in pneumatic transport lines or in fluidized beds experience electrostatic forces and tend to adhere to the walls. If the particles are excessively charged, electrostatic discharge may occur, posing a risk of fire and explosions.

Removing static electricity with ionizers

Conductive materials can discharge static electricity immediately with grounding. When surface treatments such as anodization and the like are applied, conductive materials will become insulated and grounding will be ineffective.

Insulated materials cannot discharge static electricity even if they are grounded. To discharge static electricity, you will need a suitable ionizer system as explained below:

Air Ionization

An ion is an atom that is electrically charged. It is produced when there is a change in the electrical balance of a neutral atom. If the outer shell of an atom takes on an extra electron, an ion with a negative charge is formed. If the outer shell loses an electron, a positive ion is formed.

When high voltage is applied on the tip of the ion emitter, corona discharge is observed which breaks the air molecules into + and – ions. These ions can be carried by air & used to safely neutralize the static charge which may be building up in powder processing applications.

Whatever static charge is present on objects in the work environment will be reduced and neutralized by attracting opposite polarity charges from the air.

We are happy to present to you, the solutions for the most difficult static charge problems. These are developed by SIMCO-ION, USA (the world’s most experienced company in ionization, founded 85 years ago) & proudly implemented by CIR-Q-TECH TAKO TECHNOLOGIES Pvt Ltd(pronounced Circuit-Tech Tako), the first & foremost company in the field of electrostatics in India, founded 30 years ago. The combined expertise of these two companies means that the most complicated static charge problems now have simple, easy to install solutions.

The IQ Power HL System is our most innovative static control system designed to optimize static neutralization in hazardous locations where safety is a concern. The IQ Power HL ensures exceptional ionization performance within Class1, Div. 1, Group D classified areas.

The IQ HL Static Neutralizing Bar is highly efficient and built for long lasting durability with little maintenance. Each individual ion emitting pin is current limited to eliminate the risk of hazardous electrical shock and explosion in specific classified areas. All normal (or otherwise) working conditions are continuously monitored & reported for peace of mind.

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Ionizing air duct will be installed in the hot air supply to Fluid Bed Dryer (FBD) to control static charge during the fluidization process. It is well known that the process generates high amount of static charge which can be dangerous if not controlled. Ideally, the ionized air should be able to control the static charge from building up throughout the process. Additionally, there should be reporting/monitoring system so that it is easy to know that the system is functioning normally. The tube diameter is adjusted to the existing tube system. And so is the number of integrated anti-static bars, based on the diameter.

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  • Straight and flanged edges available.
  • Simple replacement sizes provided as per your existing air duct.
  • No modification required on the FBD machine.
  • No modification to existing process.
  • Simple Installation, less downtime needed for installation.
  • SS304/SS316 or other grades of Stainless Steel can be provided.

 

Below are few static charge readings recorded at different locations on the FBD at a customer site. The readings are for the “Without Ionization” process & “With Ionization” process. The ionizing air duct was found to work exceptionally well to reduce the static charge on powder during the fluidization process, thus assuring complete safety of both equipment and operators.

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NOTE : Complete solutions also available for all kinds of pharma powder process operations like SIFTERS, AIR JET MILLING, AIR/VACUUM TRAY DRYING, POWDER STORAGE AREAS ETC.

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Vacuum Tray Dryer

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Air Jet Milling

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Sifter

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