SHYAM VASANT DIGHE
Engineers in North Huntingdon, PA

2013006, Mar 14, 2013

Sep 13, 2012

13/613478

Shyam V. Dighe - North Huntingdon PA, US

AQUASOURCE TECHNOLOGIES CORPORATION - North Huntingdon PA

C02F 1/06, B01D 3/02

203 11, 202174, 202180

System and method of treating waste water includes: receiving waste water at a first pressure and temperature, the waste water comprising dissolved solids and VOCs; pressurizing, by a pump, the received waste water to a second pressure greater than the first pressure; preheating, by a preheater, the waste water to a second temperature greater than the first temperature producing distilled water; heating, by a condenser, the waste water to a third temperature greater than the second temperature; heating the pressurized/heated water with a heater operated with a hot gas developed by a plasma torch to a fourth temperature greater than the third temperature; and removing dissolved solids from the waste water by evaporation to produce steam and brine water, wherein the brine water has a total dissolved solids content greater than a total dissolved solids content of the received waste water. The brine water is crystallized to a solid mass.

8052946, Nov 8, 2011

Oct 27, 2009

12/589657

Shyam V. Dighe - North Huntingdon PA, US
Mark Anthony Montemurro - Calgary, CA
Richard Dale Bower - Calgary, CA
Aleksandr Gorodetsky - Calgary, CA
Mark F. Darr - Acme PA, US
Ivan A. Martorell - Delmont PA, US

Westinghouse Plasma Corporation - Madison PA

B01J 8/04

422647, 422643, 422644, 208 72, 208 75

A system and process for upgrading hydrocarbons such as heavy oils includes a high temperature plasma reactor apparatus, in one or more vessels, into which the oils are introduced along with water, such as steam, to produce lighter hydrocarbon fractions, along with carbon monoxide and hydrogen, that flows to an additional stage where more hydrocarbons and water are introduced for further fractionating reactions facilitated by reaction of carbon monoxide and water to produce carbon dioxide and nascent, or prompt, free radicals of hydrogen. Heavy hydrocarbons upgraded can include heavy oils in the form of tar sands, oil shale, and oil residuals. The vessel or vessels can each contain a carbonaceous bed facilitating the described reactions and example embodiments include one vessel with the reactions performed in a single bed and, also, two vessels with the reactions performed in a carbonaceous bed portion in each vessel.

2013006, Mar 14, 2013

Sep 13, 2012

13/613442

Shyam V. Dighe - North Huntingdon PA, US

AQUASOURCE TECHNOLOGIES CORPORATION - North Huntingdon PA

C02F 1/06, B01D 3/02

203 11, 202180, 202174

System and method of treating waste water includes: receiving waste water at a first pressure and temperature, the waste water comprising dissolved solids and VOCs; pressurizing, by a pump, the received waste water to a second pressure greater than the first pressure; preheating, by a preheater, the waste water to a second temperature greater than the first temperature producing distilled water; further heating, by a condenser, the pressurized/preheated waste water to a fourth temperature greater than the second temperature; still further heating, by a heater, the pressurized/further heated waste water to a third temperature greater than the fourth temperature; and removing, by a flash evaporator, dissolved solids from the pressurized/heated waste water by evaporation producing steam and brine water, the brine water having a TDS content greater than a TDS content of the received waste water. The brine water may be crystallized to a solid mass.

2013006, Mar 14, 2013

Sep 13, 2012

13/613388

Shyam V. Dighe - North Huntingdon PA, US

Aquasource Technologies Corporation - North Huntingdon PA

C02F 1/06, B01D 3/02

203 11, 202180, 202174

System and method of treating waste water includes: receiving waste water at a first pressure and a first temperature, the waste water comprising dissolved solids and VOCs; pressurizing the waste water to a second pressure; preheating the pressurized waste water to a second temperature to produce distilled water and pressurized/preheated water; heating the pressurized/preheated to a third temperature to produce pressurized/heated water; removing dissolved solids from the pressurized/heated water, by an evaporator operated at a third pressure less than the second pressure, to produce steam and brine water; and crystallizing the brine water, by a crystallizer operated at a fourth pressure greater than the second pressure, to produce a solid mass waste product and steam. Steam produced by the crystallizer, at the fourth pressure and a fourth temperature, is a heat source for the preheater and/or heater, and steam produced by the evaporator is a heat source for the crystallizer.

2013006, Mar 14, 2013

Sep 13, 2012

13/613329

Shyam V. Dighe - North Huntingdon PA, US

AQUASOURCE TECHNOLOGIES CORPORATION - North Huntingdon PA

C02F 1/06, B01D 3/02

203 11, 202177, 202174

A system and method for treating waste water includes: receiving waste water at a first pressure and a first temperature, the waste water including dissolved solids and volatile organic compounds; pressurizing, by a pump, the received waste water to a second pressure greater than the first pressure; preheating, by a preheater, the pressurized waste water to produce distilled water and a pressurized/preheated waste water; heating, by a heater, the pressurized/preheated waste water to a second temperature greater than the first temperature to produce pressurized/heated waste water; removing, by a flash evaporator, dissolved solids from the pressurized/heated waste water by evaporation to produce steam and brine water, wherein the brine water has a total dissolved solids content greater than a total dissolved solids content of the received waste water; and crystallizing, by a plasma crystallizer, the brine water to produce a solid mass of waste product and steam.

2010019, Aug 12, 2010

Feb 11, 2009

12/378184

Shyam V. Dighe - North Huntingdon PA, US
Mark F. Darr - Acme PA, US
Ivan A. Martorell - Delmont PA, US
Pieter van Nierop - Calgary, CA
Aleksandr Gorodetsky - Calgary, CA
Richard Dale Bower - Calgary, CA

C10J 3/30

48 86 R

A plasma gasification reactor vessel having a top section with a conical wall extending up from a bottom section, containing a carbonaceous bed into which plasma is injected by plasma torches, to a roof of the vessel is arranged in ways that can contribute to characteristics of gas flow and solids residence time that are favorable for thoroughness of reactions and yield of useful reactions products. In some cases, such a conical wall is combined in arrangements with other features such as one or more feed ports arranged to give more uniform distribution including examples with a feed port that has a distributive feed mechanism. The roof of the vessel, in some examples, has vertical outlet ports that include intrusions into the interior volume of the reactor proximate the conical wall of the top section. The configurations of outlet ports with intrusions and the configurations of feed ports for more uniform distribution of feed material are also applicable to reactor vessels with other geometries.

8534365, Sep 17, 2013

Apr 27, 2011

13/066866

Shyam V. Dighe - North Huntingdon PA, US

Dighe Technologies Corporation - North Huntingdon PA

E21B 7/12

166364, 166363, 405 60, 405205, 405210

Apparatus and method for containing and recovering undersea oil or gas well leakage by reason of the leaked fluid being lighter than sea water may include a canopy, or a series of interconnected canopies, which, when placed over a leak site, allow leaked fluid to be captured and displace sea water with the canopy or series of canopies having an arrangement, such as one or more conduits, for flow of leaked fluid upward from a respective canopy to the surface. With a system with multiple canopies in a series with exit arrangements for leaked fluid from a lower canopy to a next upper canopy, the series can readily extend from the surface to a great depth and allow transfer of volumes of the leaked fluid that are not limited by the capacity of canopies or conduits at deep locations.

4853033, Aug 1, 1989

Jun 29, 1988

7/212851

Shyam V. Dighe - North Huntingdon PA
Raymond F. Taylor - Irwin PA

Electric Power Research Institute - Palo Alto CA

C22B 400

75 1022

A method of desulfurizing iron in a plasma fired cupola having a plurality if feed nozzles each of which have a particulate feed and a plasma torch connected thereto; a fluxing agent such as CaO, MgO, CaCO. sub. 3, MgCO. sub. 3 or CaCO. sub. 3 MgCO. sub. 3 is fed to the feed nozzle and melted by the plasma torch; the molten fluxing agent mixes directly with the molten iron in the cupola and reacts with the sulfur in the iron; the reacted and unreacted fluxing agent combine with the slag reducing the viscosity making the slag flow better and producing a low sulfur iron in the cupola.

4889556, Dec 26, 1989

Aug 1, 1988

7/226712

Shyam V. Dighe - North Huntingdon PA

Westinghouse Electric Corp. - Pittsburgh PA

C22B 400

75 1022

A process for recycling steel belted tires by shredding the tires in multiple stages and separating the rubber from the rubber encrusted steel until the rubber encrusted steel is about 50% steel and charging a plasma fired cupola with the rubber encrusted steel, coke, and limestone, melting the steel and adding dolomite as a desulfurizing agent in the plasma torch feed nozzle to make a low sulfur iron.

4780132, Oct 25, 1988

May 8, 1987

7/047809

Shyam V. Dighe - North Huntingdon PA
William H. Provis - Port Washington WI

Electric Power Research Institute - Palo Alto CA

C22B 400

75 1022

A plasma-fired cupola may be operated at very low gas flow levels in the range of 0. 9 SCFM per sq. inch of cupola cross-sectional area and with recirculated off-gas substantially reducing the rate at which coke is burned thus reducing the sulfur content of the iron produced also alloying elements may be added as ferrous-alloys or as alloy oxides through the plasma torch with or without recirculated off-gas and/or pulverized coke to rapidly change the chemical composition of the iron being formed.