 Process for removing nitrogen oxides and sulfur dioxide from effluent gases |
| What we claim is: 1. A process for removing NO.sub.x and SO.sub.2 from effluent gases, comprising ... |
|
| Method for removing sulfur dioxide from a gas stream |
| Briefly, these and other objects of the invention may be achieved by a method of removing SO.sub.2 ... |
|
| Method and apparatus for heating process air for industrial purposes |
| The object of the present invention is to eliminate the above disadvantages and achieve a method ... |
|
| Device for desulphurizing and denitrating flue gases by electron irradiation |
| OF THE INVENTION Due to the use of an acceleration voltage for the electrons of 250 keV (so-called ... |
|
| Method and apparatus for producing a monatomic beam of ground-state atoms |
| To accomplish the objects discussed above, the invention utilizes the process of electron capture ... |
|
| Optical glass |
| The present invention has, for its object, to provide compositions for optical glass of high ... |
|
| Apparatus for producing a monatomic beam of ground-state atoms |
| To accomplish the objects discussed above, the claimed invention utilizes the process of electron ... |
|
| Method of and apparatus for treating waste gas by irradiation with electron beam |
| What is claimed is: 1. A method of treating waste gas flowing in a waste gas main duct, comprising: ... |
|
| Method of treating waste gas by irradiation with electron beam |
| The present invention provides a method of treating waste gas by irradiation with radiation which ... |
|
|
Pollutant remediation system
| Details |
Inventors: Williamson, Weldon S.; Cirlin, Eun-Hee; Dolezal, Frank A.; Harvey, Robin J.;
Assignee: Hughes Electronics Corporation (El Segundo, CA)
Primary Examiner: Mayekar; K.
Assistant Examiner:
Attorney, Agent or Firm: Duraiswamy; V. D., Denson-Low; W. K.
A pollutant destruction system connects a capacitive corona discharge chamber in a self-resonant circuit with an inductive element. Intermittent energizing signals are furnished from a power supply to induce corona discharges within the chamber, with the resonant circuit responding to the energizing signals by initiating additional corona discharges between energizing signals in a highly energy efficient operation. One or more discharge chambers can be provided in the resonant circuit, with each discharge chamber comprising a dielectric enclosure with a distributed electrode outside and an elongate electrode inside the enclosure. The inner electrode can extend either along the chamber axis, or along the inner chamber wall for better support and heat dissipation. The energizing pulse frequency can be controlled in various ways, such as in response to a termination of corona discharges, an increase in the pollutant concentration or an acceleration of an engine whose exhaust is being treated, or the pulses can be applied at a fixed rate. |
|
DETAILED DESCRIPTION The present invention seeks to provide a system and method for remediating fluid borne pollutants that requires significantly less energy than in the past without detracting from its destruction capabilities.
The goal is achieved by connecting a capacitive corona discharge chamber in a resonant circuit with an inductive element.
External energizing pulses are applied to the circuit only as necessary to sustain the generation of corona pulses, with corona pulses between the external signals generated by the self-resonance of the circuit itself.
Various resonant circuit configurations can be used, such as a single corona discharge chamber and inductive element connected in a loop, a ringing circuit between one inductive element and a pair of discharge chambers, and an inductive element connected in parallel with multiple discharge chambers.
The discharge chamber is preferably implemented as a dielectric enclosure with a distributed electrode outside the enclosure and a elongate electrode inside.
The inner electrode, preferably an insulated wire, can either extend along a central axis of the chamber or can be offset from the central axis.
In the latter case the inner electrode preferably extends along an inner wall of the chamber; when the chamber has a polygon shape the inner electrode preferably extends along one of the polygon vertices.
To increase the flow path, multiple corona discharge chambers can be arranged in an array with adjacent flow paths, with the inductive element connected in a resonant circuit with each of the discharge chambers.
Various mechanisms can be used to control the application of energizing pulses to the self-resonant circuit.
These include the supply of energizing signals in response to a sensed termination of corona discharges within the chamber, modulating the energizing signal rate in response to the level of pollution in the fluid stream and, when the discharge chamber is used to remove pollutants from an engine exhaust, varying the energizing signal rate with the engine acceleration
|
| Related patents |
|
|
Corona discharge pollutant destruction apparatus and manufacture method
The present invention concerns a corona discharge pollutant destruction apparatus including a corona discharge reactor, and a method of manufacturing the apparatus. The ...
|
|
|
Process and device for purifying exhaust gases containing nitrogen oxides
The object of the invention is, therefore, to provide an improved process suitable for purifying exhaust gases of motor vehicle engines. A further object is to provide a ...
|
|
|
Device for carrying out chemical reactions using a microlaminar mixer
This object is achieved according to the invention by a process in which at least two educts A, B are divided in a microstructure mixer, by a system of slit-like ...
|
|
|
Method and apparatus for decontamination of soils and other particulate materials
OF THE INVENTION In accordance with the present invention, it has been determined that treatment of solid materials containing contaminants, including organic ...
|
|
|
Etching method and process for producing a semiconductor element using said etching method
A principal object of the present invention is to eliminate the foregoing problems in the prior art and to provide an etching process which has few, simple treatment ...
|
|
|
Method and apparatus for reducing contaminants in exhaust gases of an engine
Accordingly, it is an object of the present invention to provide a method and apparatus for reducing contaminates in the exhaust gases of an internal combustion engine ...
|
|
|
Internal combustion engine having lean NOx catalyst
It is a primary object of the present invention, which was devised under such circumstances to obviate the above problems, to provide an internal combustion engine ...
|
|
|
Method for galvanically winning or refining copper
What we claim is: 1. A method for electrochemically refining copper, which comprises placing a catholyte solution consisting of a copper ion aqueous solution in the ...
|
|
|
Method for manufacturing high quality carbon nanotubes
OF THE INVENTION Growth Process Referring particularly to the sole drawing FIGURE, a preferred process 10 according to the present invention is illustrated ...
|
|
|
Hydration resistant fused dolomitic grain and production method therefor
We claim: 1. A basic, fused refractory material consisting essentially of, by weight on the oxide basis, 50-67% MgO and 33-50% CaO, and being characterized in at least a ...
|
|
|
Manufacturing Materials 
