204 results about "Particle charge" patented technology

A particle removal apparatus for removing particles from a chamber of a plasma processing apparatus, wherein the chamber is connected to a gas exhaust port and a plasma of a processing gas is generated in the chamber to plasma process a substrate to be processed, includes a particle charging control member for positively charging particles generated within the chamber by positive ions of an ion sheath region formed in a region other than the vicinity of the substrate to be processed, wherein positively charged particles are discharged from the chamber via the gas exhaust port. Therefore, there is no plasma disturbance or metal contamination, and thus can be applied to a practical use.

The invention discloses a device for removing PM 2.5 from a smoke. The device is characterized in that: the device comprises a removing tower, a wet electrical dust precipitator and one or more wetting spray apparatuses; the lower part of the removing tower is provided with a smoke inlet end; the smoke inlet end of the removing tower is provided with a particle charging zone and a mixing coagulation zone; the particle charging zone is divided into a positive corona discharging zone and a negative corona discharging zone; an anode is arranged in the positive corona discharging zone; a cathode is arranged in the negative corona discharging zone; at least one stage of wetting spray apparatus is arranged in the removing tower which is above the smoke inlet end; the wet electrical dust precipitator is arranged in the removing tower which is above the wetting spray apparatus; and the top of the removing tower is provided with a smoke outlet. The invention also discloses a method for removing PM2.5 from the smoke. The method sequentially comprises steps of particle charging, mixing coagulation, dust wetting tempering, and wet electrical precipitation. The device and the method have the following advantages: fine dust PM2.5 can be removed from fire coal; fine particles of acid mist, heavy metal particles and the like can be removed from the smoke; and the PM2.5 removal rate is equal to or greater than 95%.

A cyclone dust-separating apparatus in which the electrical field and particle charge can be uniform and stable. The cyclone dust-separating apparatus comprises: a cyclone body; an air intake pipe, through which air flows from outside into the cyclone body; an air exhaust pipe, through which air flows out of the cyclone body; a grounding member installed on the inside surface of the cyclone body; a plurality of discharge electrode members installed on the air exhaust pipe; and a high voltage power source connected to the air exhaust pipe. The air exhaust pipe conducts electricity, and the discharge electrode members are installed on one or more sides of the air exhaust pipe, are needle-shaped, and protrude from the outer surface of the air exhaust pipe so as to form a uniform and stable electrical field.

A high performance electronic air filter comprising an ionized region and a dust collecting region is characterized in that: the filter also comprises a condensation region, said condensation region is on the air inlet side, the dust collecting region is on the air outlet side, the ionized region is in the middle, and there is condensation electrode assembly comprising multi-direct current anode and cathode coronas in the condensation region. The filtration efficiency can be improved by arranging a particle charge condensing region above the ionized region. The air filter can filter submicro particles in air, cleaning air, and improve air quality.

The invention relates to an electrostatic particle filter for removing particles from air. The electrostatic particle filter includes a filter medium (3) with first and second opposite sides, a first electrode (1) and a second electrode (2), the first electrode (1) and second electrode (2) being conformally provided on the first and second sides of the filter medium (3), respectively. The first electrode (1), the second electrode (2), and the filter medium (3) are arranged to allow an electrical conduction current through the filter medium (3). The first electrode (1) is a moderately-conductive electrode having a sheet resistance in a range with a lower boundary value of about 106 Ohm per square and an upper boundary value of about 1012 Ohm per square, at a relative humidity of 30%. The invention also relates to an electrostatic filtration system including the electrostatic particle filter, and a particle charging section (6).

A device and method for generating negatively charged nm particles is disclosed. Said device is composed of superfine electronic emitting electrode and control package. Under the action of power supply and control package and according to the material, shape, size and purpose of electrode, the superfine electronic emitting electrode is relatively at negative 2-29 KV potential to generate tunnel-effect field electron emitting. When the generated high-density electrons are collided with particles in air sol, their energy is regulated to make the electrons be attached to the nm particles.

The invention discloses a method for acquiring electrified accumulated dirt distribution of an insulator in a flow field environment, which comprises the following steps of: S1, drawing a three-dimensional stereogram of an insulator, establishing a simulation model of the insulator and a limited air area, acquiring material data of a real insulator and an actual environment, and setting material parameters; S2, adding a flow field and an electric field, and setting basic parameters of the flow field and the electric field; S3, adding a fluid flow particle tracking module in the flow field of the simulation model; S4, calculating the particle charge quantity according to the electric field intensity, setting the charge quantity of fluid flowing particles, and establishing the relation between the particle charge quantity and the electric field; S5, establishing a coupling relationship between the flow field and the electric field; S6, obtaining a dirt accumulation distribution map of the insulator under the action of airflow and an electric field; The method solves the problems that in the prior art, on-site insulator pollution data acquisition is difficult, and an existing numerical method cannot achieve multi-physical-field coupling.

The present invention relates to a novel process for the remote plasma surface treatment of substrate particles at atmospheric pressure. The invention is motivated by the urge to overcome major drawbacks of particle treatment in low pressure plasmas and in-situ particle treatment at atmospheric pressure. The former requires complex and mostly expensive vacuum installations and vacuum locks usually prohibiting continuous processing. Independent of the system pressure, in-situ plasma treatment causes particle charging and therefore undesirable interaction with the electric field of the discharge, which is seen to contribute to the process of reactor clogging. Additionally, the filamentary discharges modes of atmospheric pressure plasmas are inflicted with inhomogeneous surface treatment. Furthermore, short radical lifetimes at elevated pressures complicate a remote plasma treatment approach as widely used in low pressure applications. The key-element of the invention is that by reducing the dimension of the atmospheric discharge arrangement to the micrometer range, transonic flow conditions can be achieved in the discharge zone while maintaining moderate flow rates. The resulting superimposition of high drift velocity in the gas flow and the inherent diffusion movement is to prolong the displacement distance of activated species, thus making a remote plasma treatment of substrate particles feasible and economically interesting. The circumferential arrangement of e.g. micro discharge channels around the treatment zone of variable length allows a remote plasma treatment independently of the discharge mode and benefits additionally from the aerodynamic focusing of a particle-gas stream to the centre, reducing reactor clogging. Furthermore, taking advantage of non-thermal discharges, there is no restriction of the concept of the outlined invention in the material properties of the particulate solids especially not with regard to the treatment of temperature sensitive materials as often encountered in polymer or pharmaceutical industries. In conclusion, atmospheric pressure plasma treatment close to ambient gas temperature as well as continuous processing is a specialty of the invention disclosed here.

A reversible image display panel which comprises a pair of substrates one of which is transparent and a group of particles charged with single polarity, a group of particles with single color charged with single polarity, a group of particles having portions with different colors and different charge characteristics, or two groups of particles with different charge characteristics each enclosed between the substrates, characterized in applying an electric field across the substrates, and displaying images by flying and moving the particles. The reversible image display panel and the image display device in accordance with the invention have fast response speed and simple structure, being superior in stability and vividity. In an occasion of driving, generation of the strong electric field is unnecessary for them and accordingly, electric circuits can be assembled employing general purpose electronic materials.