PAUL L FELDMAN
Engineers in Eldersburg, MD

5695549, Dec 9, 1997

Apr 5, 1996

8/628406

Paul L. Feldman - Sykesville MD
Krishnaswamy S. Kumar - Milford NJ

Environmental Elements Corp. - Baltimore MD

B03C 314

96 55

A system incorporating an agglomerator is provided for removing fine particulates from a gas stream. The agglomerator (100) is coupled to a flue (12) for agglomerating fines (30) entrained in a gas stream, the agglomerates (40) reentrained into the gas stream are carried by ductwork (14) to an existing particulate removal system (20). Agglomerator (100) includes at least two screen electrodes (102, 104) for charging the particulates (30) and temporarily collecting the charged particles on the collection electrode screen (104). The charging electrode (102) is provided with a plurality of spaced pointed electrode elements (108), the spacing therebetween being proportional to a spacing between the two screen electrodes (102, 104). The screen electrodes (102, 104) have a grid spacing sufficiently large to insure reentrainment of the agglomerates (40) back into the bulk gas stream for separation by the existing particulate removal system (20).

5733360, Mar 31, 1998

Apr 5, 1996

8/628484

Paul L. Feldman - Sykesville MD
Krishnaswamy S. Kumar - Millford NJ

Environmental Elements Corp. - Baltimore MD

B03C 341

95 78

A corona discharge reactor (10) and method for chemically activating various constituents of a gas stream by use of corona discharge is provided. The corona discharge reactor (10) includes within a conduit a discharge plate (30a,b) having a plurality of through openings (33) and a plurality of projecting corona discharge electrodes (31,31',35,35'), and an electrode plate (40a,b,c) having a plurality of through openings (43) displaced from and opposing the tips (32) of the corona discharge electrodes (31,31',35,35'). A pulsed energization scheme is employed to intermittently generate a uniformly distributed corona discharge cloud (1000) between the plurality of corona discharge electrode tips (32) and the electrode plate (40a,b,c) during passage of the gas stream through the conduit. In an alternate embodiment, a back corona discharge member (60a,b,c,d) formed of a high resistance material is overlaid across that face of the electrode plate (40a,b,c) opposing the tips (32) of the corona discharge electrodes (31,31',35,35'). As corona discharge is generated from the tips (32) of the corona discharge electrodes (31,31',35,35'), the intense electric field generated in the high resistance material of the back corona discharge member (60a,b,c) generates back corona discharge.

5707428, Jan 13, 1998

Aug 7, 1995

8/512198

Paul L. Feldman - Sykesville MD
Krishnaswamy S. Kumar - Millford NJ

Environmental Elements Corp. - Baltimore MD

B03C 312

96 54

An electrostatic precipitation system (100) utilizes laminar flow of a particulate-laden gas in order to enhance the removal of sub-micron sized particulates. The system incorporates a vertically oriented housing (105) through which the gas flows downwardly therethrough to a lower outlet port (110). The gas, which may be a flue gas enters the laminar flow precipitator (102) through an inlet port (108) for passage through a charging section (104). The charging section (104) imparts a charge to the particulates carried by the flue gas. The flue gas and charged particles then flow to a collecting section (106) which is downstream and below the charging section (104). The collecting section (106) is formed by a plurality of substantially parallel tubular members, each tubular member defining a collecting passage therein. Each tubular member (118) is electrically coupled to a potential that is of opposite polarity to that imparted to the particulates, so as to attract the charged particulates to an inner surface thereof. The collected particulates are subsequently collected in a hopper (112) or reentrained in the gas stream as agglomerates for subsequent removal from the gas by a secondary filter (120), the gas stream then being conveyed to a stack (14) wherein the particulate-free gas can be emitted into the atmosphere.

5626652, May 6, 1997

Jun 5, 1996

8/658717

Robert E. Kohl - Ellicott City MD
Paul L. Feldman - Sykesville MD
Krishnaswamy S. Kumar - Millford NJ

Environmental Elements Corporation - Baltimore MD

B03C 353

96 45

An electrostatic precipitation system (100) utilizes laminar flow of a particulate-laden gas in order to enhance the removal of sub-micron sized particulates. The system incorporates a vertically oriented housing (105) through which the gas flows downwardly therethrough to a lower outlet port (110). The gas, which may be a flue gas enters the laminar flow precipitator (102) through an inlet port (108) for passage through a charging section (104). The charging section (104) imparts a charge to the particulates carried by the flue gas. The flue gas and charged particles then flow to a collecting section (106) which is downstream and below the charging section (104). The collecting section (106) is formed by a plurality of substantially parallel tubular members, each tubular member defining a collecting passage therein. Each tubular member (118) is electrically coupled to a potential that is of opposite polarity to that imparted to the particulates, so as to attract the charged particulates to an inner surface thereof. The collected particulates are subsequently collected in a hopper (112) or reetrained in the gas stream as agglomerates for subsequent removal from the gas by a secondary filter, the gas stream then being conveyed to a stack (14) wherein the particulate-free gas can be emitted into the atmosphere.

6245126, Jun 12, 2001

Mar 22, 1999

9/273350

Paul L. Feldman - Sykesville MD
Dennis J. Helfritch - Baltimore MD

Enviromental Elements Corp. - Baltimore MD

B03C 374

95 59

A method of filtering air includes the steps of providing a filter element, providing a pair of electrodes sandwiching the filter element, applying a DC electrostatic field to the electrodes to produce attracting forces between particulates and micro-organisms contained in the air and the filter element, and intermittently applying a sterilizing electrical field concurrently with the electrostatic field. An RF, DC pulse, or AC power supply can be used to generate the sterilizing electrical field.

6245132, Jun 12, 2001

Aug 7, 2000

9/633883

Paul L. Feldman - Sykesville MD
Dennis J. Helfritch - Baltimore MD

Environmental Elements Corp. - Baltimore MD

B03C 374

96 28

Electrically enhanced filter, includes a filter element, a pair of electrodes sandwiching the filter element, a DC, AC, pulse, or RF power supply coupled to the electrode to create an electrostatic field across the filter element and to produce attracting forces between micro-organisms contained in the air and the filter element, and a power supply creating a sterilizing electrical field, which may be either an RF, DC, pulse, or AC power supply coupled to the electrodes and creating discharging or non-discharging voltages on the filter element to destruct the micro-organisms at and in the vicinity of the filter element.