Patents Assigned to RDP Technologies, Inc.
  • Patent number: 11897800
    Abstract: As pellets grow from seed/sand in a fluidized bed pellent reactor, the weight of the reactor is measured and the density of the contents of the reactor is calculated, and the input flow of untreated water, water treatment chemical, and seed/sand are adjusted to provide improved removal of water hardness while reducing fine particulates in the outflow of softened water from the reactor.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: February 13, 2024
    Assignee: RDP Technologies, Inc.
    Inventor: Richard W. Christy
  • Patent number: 11339066
    Abstract: A method and apparatus is provided for treating water with already-slaked lime to arrive at a lime slurry that is in a solution or suspension, and delivering the thus treated water to a separating device which separates grit particles therefrom, to recover a high quality lime/water solution or suspension. An automated system controls the addition of lime and water to a lime mixing vessel. An acid wash system is provided which comprises an automated method and apparatus for removing scale buildup, for delivering an acid wash solution to the lime mixing vessel, the lime slurry holding tank and/or the delivery system, or any of them, thereby dissolving the scale buildup.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: May 24, 2022
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 11339071
    Abstract: An apparatus, method and system is provided for treating sewage sludge by dewatering the sewage sludge, heating the sewage sludge being treated to destroy pathogens, and then reducing volatile solids in the sewage sludge being treated through biochemical decomposition to produce a treated biosolids product that meets government regulations for pathogen reduction and vector attraction reduction.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: May 24, 2022
    Assignee: RDP Technologies, Inc.
    Inventor: Richard W. Christy
  • Patent number: 11319247
    Abstract: A fine grit classifier for removing grit from a milk of lime slurry includes a settling tank for receiving the milk of lime slurry, means for creating turbulence inside the tank to promote grit settling, a launder for collecting milk of lime slurry from an upper portion of the settling tank and directing milk of lime slurry to an outlet, and an auger for transporting settled grit from the lower portion of the settling tank and discharging the settled grit.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: May 3, 2022
    Assignee: RDP Technologies, Inc.
    Inventor: Richard W. Christy
  • Patent number: 11286173
    Abstract: A method and apparatus is provided for water filtration of a milk of lime solution that contains water, impurities, and grit particles, in which the milk of lime solution enters a vessel, and wherein turbulence is created in the vessel, by which larger grit particles settle out of the milk of lime solution, to form a bed of grit particles in the lower end of the vessel, such that grit particles and impurities are filtered from the lime-treated water that comprises a milk of lime solution, with water then being drawn off, that may be discharged out one or more dosing locations and/or recycled back for further filtration, as may be desired.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: March 29, 2022
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici
  • Patent number: 11225426
    Abstract: As pellets grow from seed/sand in a fluidized bed pellent reactor, the weight of the reactor is measured and the density of the contents of the reactor is calculated, and the input flow of untreated water, water treatement chemical, and seed/sand are adjusted to provide improved removal of water hardness while reducing fine particulates in the outflow of softened water from the reactor.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: January 18, 2022
    Assignee: RDP Technologies, Inc.
    Inventor: Richard W. Christy
  • Patent number: 10906822
    Abstract: A method and apparatus is provided for treating water with already-slaked lime to arrive at a lime slurry that is in a solution or suspension, and delivering the thus treated water to a separating device which separates grit particles therefrom, to recover a high quality lime/water solution or suspension. An automated system controls the addition of lime and water to a lime mixing vessel. An acid wash system is provided which comprises an automated method and apparatus for removing scale buildup, for delivering an acid wash solution to the lime mixing vessel, the lime slurry holding tank and/or the delivery system, or any of them, thereby dissolving the scale buildup.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: February 2, 2021
    Assignee: RDP TECHNOLOGIES, INC.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 10538446
    Abstract: An apparatus, method and system is provided for treating sewage sludge by dewatering the sewage sludge, heating the sewage sludge being treated to destroy pathogens, and then reducing volatile solids in the sewage sludge being treated through biochemical decomposition to produce a treated biosolids product that meets government regulations for pathogen reduction and vector attraction reduction.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: January 21, 2020
    Assignee: RDP TECHNOLOGIES, INC.
    Inventor: Richard W. Christy
  • Patent number: 10479623
    Abstract: A sludge handling system includes a bin from which treated sewage sludge is discharged. A rotabable discharge device includes an arm for scraping the inside of the bin and a frusto-conical chute from which sludge is discharged through a gate to a waiting truck. A stationary scoop is provided mounted on the gate to scrape the interior wall of the chute of adhering sludge.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: November 19, 2019
    Assignee: RDP TECHNOLOGIES, INC.
    Inventors: Richard W. Christy, Michael Quici, Michael J. Millman
  • Patent number: 10112852
    Abstract: Process and apparatus is disclosed for providing a chemical reaction between calcium oxide containing grit particles to produce calcium hydroxide and heat, capturing the heat of hydration and using it to preheat water initially at ambient temperature, to rise to an elevated temperature to increase the amount of lime present in the water to a supersaturated lime suspension level, with the chemical reaction running to completion, followed by cooling. Heat from a water jacket may be used to raise the temperature in the lime slaker. A process and apparatus is also provided for dissolving scale on internal surfaces of a lime slaker, a lime aging tank, grit separation device and piping and dosing sub-systems, by adding acid into the system with rinse water. A pressurized delivery system that is substantially closed to the atmosphere delivers treating doses of slaked lime slurry under sufficient pressure conditions to maintain a relatively constant back pressure, by means of valving.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: October 30, 2018
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 9856166
    Abstract: Process and apparatus is disclosed for providing a chemical reaction between calcium oxide containing grit particles to produce calcium hydroxide and heat, capturing the heat of hydration and using it to preheat water initially at ambient temperature, to rise to an elevated temperature to increase the amount of lime present in the water to a supersaturated lime suspension level, with the chemical reaction running to completion, followed by cooling. Heat from a water jacket may be used to raise the temperature in the lime slaker.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: January 2, 2018
    Assignee: RDP TECHNOLOGIES, INC.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 9745217
    Abstract: A lime stabilization system and method is provided in which thickened liquid sludge and lime are separately delivered, under controlled conditions, to a reaction tank and mixed therein to a predetermined pH, controlled via a programmable logic computer. The weight of liquid sludge in the reaction tank is controlled from the computer via load cells that measure the weight of such liquid sludge in the reaction tank. The computer monitors the amount of liquid sludge and lime delivered to the reaction tank, for mixing therein to a desired pH, for a predetermined amount of time, and the resultant mix is discharged from the reaction tank, to a holding tank, for return to the land.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: August 29, 2017
    Assignee: RDP TECHNOLOGIES, INC.
    Inventors: Richard W. Christy, Michael Quici, Stephen H. Yost
  • Patent number: 9650293
    Abstract: Process and apparatus is disclosed for providing a chemical reaction between calcium oxide containing grit particles to produce calcium hydroxide and heat, capturing the heat of hydration and using it to preheat water initially at ambient temperature, to rise to an elevated temperature to increase the amount of lime present in the water to a supersaturated lime suspension level, with the chemical reaction running to completion, followed by cooling. Heat from a water jacket may be used to raise the temperature in the lime slaker.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: May 16, 2017
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 9315399
    Abstract: Process and apparatus is provided for making a solution of sodium carbonate (soda ash) and water by which the soda ash is delivered in dry, particulate form to a silo, while air is being exhausted from the silo, dehumidifying air from the silo and discontinuing the dehumidifying of air while soda ash is being delivered to the silo, delumping soda ash in the silo, and then delivering water to a mixing vessel and transferring particulate soda ash to the treating vessel, in which it is mixed and the resulting solution is then discharged. The solution can be delivered to a storage tank or vessel and then to either a single or multiple outlet dosing station and/or some of the solution can be returned to a storage silo.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: April 19, 2016
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici
  • Publication number: 20150368127
    Abstract: A method and apparatus is provided for treating water with already-slaked lime to arrive at a lime slurry that is in a solution or suspension, and delivering the thus treated water to a separating device which separates grit particles therefrom, to recover a high quality lime/water solution or suspension. An automated system controls the addition of lime and water to a lime mixing vessel. An acid wash system is provided which comprises an automated method and apparatus for removing scale buildup, for delivering an acid wash solution to the lime mixing vessel, the lime slurry holding tank and/or the delivery system, or any of them, thereby dissolving the scale buildup.
    Type: Application
    Filed: August 20, 2015
    Publication date: December 24, 2015
    Applicant: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 9174861
    Abstract: A method and apparatus is provided for treating water with already-slaked lime to arrive at a lime slurry that is in a solution or suspension, and delivering the thus treated water to a separating device which separates grit particles therefrom, to recover a high quality lime/water solution or suspension. An automated system controls the addition of lime and water to a lime mixing vessel. An acid wash system is provided which comprises an automated method and apparatus for removing scale buildup, for delivering an acid wash solution to the lime mixing vessel, the lime slurry holding tank and/or the delivery system, or any of them, thereby dissolving the scale buildup.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: November 3, 2015
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 9169147
    Abstract: A lime stabilization system for treatment of sewage sludge, and method is provided in which dewatered sludge and lime are provided to a mixer. Lime and sludge are mixed to raise the pH during which volatiles are driven off with or without supplemental heat. A forced air draft prevents steam from backing up into the lime supply. The sludge goes to a discharge station via a transfer apparatus, and air containing any dust, odors, steam or ammonia is cleaned via a scrubber. The system is computer-controlled via gravimetric load cells and/or volumetric means. The system includes computer controlled means for dissolving scale resulting from exposure of surfaces to lime, using acid, water or combinations thereof.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: October 27, 2015
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Stephen H. Yost
  • Patent number: 9023312
    Abstract: Process and apparatus is disclosed for providing a chemical reaction between calcium oxide containing grit particles to produce calcium hydroxide and heat, capturing the heat of hydration and using it to preheat water initially at ambient temperature, to rise to an elevated temperature to increase the amount of lime present in the water to a supersaturated lime suspension level, with the chemical reaction running to completion, followed by cooling. Heat from a water jacket may be used to raise the temperature in the lime slaker. A process and apparatus is also provided for dissolving scale on internal surfaces of a lime slaker, a lime aging tank, grit separation device and piping and dosing sub-systems, by adding acid into the system with rinse water. A pressurized delivery system that is substantially closed to atmosphere delivers treating dosing under sufficient pressure conditions to maintain a relatively constant back pressure, by means of valving.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: May 5, 2015
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici, Louis Litz
  • Patent number: 8939329
    Abstract: A sewage sludge silo is provided, having a central discharge arm for discharging sludge via a central discharge opening, by means of the discharge arm sweeping across a preferably sloped silo floor, with the discharge arm having upper and lower ends, with the lower end extending forward of the upper end in transverse generally vertical cross-section, as the discharge arm moves in a forward direction across the silo floor. The silo floor can be of multi-layer construction, with one of the layers being molded to facilitate a sloped configuration for the silo floor. The movement of a silo discharge arm can be computer controlled to adjust the speed of the discharge arm to maintain a predetermined or substantially constant rate of discharge of sludge from the silo, with such control being facilitated by appropriate sensor mechanisms.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: January 27, 2015
    Assignee: RDP Technologies, Inc.
    Inventors: Richard W. Christy, Michael Quici
  • Publication number: 20140175026
    Abstract: A lime stabilization system for treatment of sewage sludge, and method is provided in which dewatered sludge and lime are provided to a mixer. Lime and sludge are mixed to raise the pH during which volatiles are driven off with or without supplemental heat. A forced air draft prevents steam from backing up into the lime supply. The sludge goes to a discharge station via a transfer apparatus, and air containing any dust, odors, steam or ammonia is cleaned via a scrubber. The system is computer-controlled via gravimetric load cells and/or volumetric means. The system includes computer controlled means for dissolving scale resulting from exposure of surfaces to lime, using acid, water or combinations thereof.
    Type: Application
    Filed: October 8, 2013
    Publication date: June 26, 2014
    Applicant: RDP TECHNOLOGIES, INC.
    Inventors: Richard W. Christy, Michael Quici, Stephen H. Yost