Grid Electrostatic Precipitator/Filter for Diesel Engine Exhaust Removal
OwnerJohn Dunninventor
Life of this patent
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Abstract
A method and apparatus electrically charges particulates that need to be removed from a moving air stream. Various methods of corona charging of particulates are used in the fields of electrostatic precipitation of dust, printers and copying machines. This invention is preferably specifically aimed at improving the separation and collection of particulates from dust, mist or vapor generating devices. In another embodiment, a grid electrostatic precipitator, in combination with a corona pre-charger, is used to remove diesel exhaust.
Claims28
A method of removing a plurality of carbon particles from a single air stream in a diesel engine, comprising the steps of:
- a) passing particles through a corona pre-charger to generate ions;
- b) drawing the ions into the single air stream such that the ions become attached to the carbon particles;
- and
- c) passing the air stream between a plurality of grid electrodes, each grid electrode having an opposite polarity as the grid electrodes adjacent to it such that an attractive field is created and the attractive field causes the particles pass through at least one grid electrode into a static air movement zone where particles are collected.
An apparatus for removing exhaust from a single air stream in a diesel engine, comprising:
- a) an input for the air stream entering the apparatus;
- b) an output located on an opposite side of the apparatus from the input, wherein the air stream exits the apparatus at the output;
- c) a corona pre-charger located outside the single air stream, wherein the corona pre-charger generates a plurality of ions and wherein the ions are drawn into the single air stream such that the ions become attached to a plurality of carbon particles;
- and
- d) a plurality of grid electrodes located between the input and the output;
- such that when opposite charges are applied to adjacent grid electrodes, an attractive field is created and the carbon particles in the air stream pass through at least one grid electrode into the static air movement zone where the carbon particles are collected.
An apparatus for charging particulates that need to be removed from an entrained air stream, comprising:
- a) an electrostatic precipitator;
- and
- b) a corona pre-charger located outside of the air stream, wherein the corona pre-charger generates a plurality of ions and wherein the ions are drawn into the entrained air stream such that the ions become attached to a plurality of particles in the precipitator.
A method of generating ions comprising the step of passing a plurality of particles through a corona pre-charger to generate a plurality of positive ions and a plurality of negative ions.
Dependencies are inferred from the claim text.