Patents by Inventor Paul Watkinson
Paul Watkinson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240110111Abstract: A method and system for the generation of a medium-Btu, clean and renewable fuel gas to replace fossil fuels in existing lime kilns with minimal retrofitting without significantly compromising the kiln capacity. A steam-blown dual fluidized bed gasifier produces renewable fuel gas from a carbonaceous feedstock such as woody biomass. A gas cleanup process purifies the raw fuel gas, resulting in a clean fuel gas for mitigation of lime contamination and environmental issues. The adiabatic flame temperature and flue gas volume/GJ for the combustion of the renewable fuel gas are similar to values for natural gas, making retrofitting of fossil fuel-fired lime kilns relatively straightforward.Type: ApplicationFiled: September 28, 2023Publication date: April 4, 2024Inventors: Yong Hua LI, Wei WANG, Alan Paul WATKINSON
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Publication number: 20230220288Abstract: A solid circulation monitoring and/or control system for a dual bed gasification apparatus. The monitoring and/or control system comprises a plurality of pressure sensors located at various regions within the dual bed gasification system, for monitoring pressure while the apparatus is operated. Comparison of pressures and pressure differentials between different regions of the gasifier allow monitoring of the status, and optimization of the operation conditions of the apparatus.Type: ApplicationFiled: January 12, 2023Publication date: July 13, 2023Inventors: Yong Hua LI, Wei WANG, Alan Paul WATKINSON
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Patent number: 10766648Abstract: A propellant filling apparatus (10) comprising a filling booth (11) for receiving within it one or more containers for filling with a propellant; a propellant inlet (12) to the filling booth (11) that is capable of supplying propellant into one or more containers within the filling booth (11) from a propellant supply; an inert gas inlet (13) supplying inert gas from an inert gas supply (14) into the filling booth (11), a discharge outlet (16) from the filling booth (11); an extraction fan (17) that is capable of adjusting its fan speed to maintain the pressure of gas in the filling booth (11) to be lower than atmospheric pressure; and an oxygen detector (27) that is capable of detecting levels of oxygen in the filling booth (11) and triggering circulation of inert gas in the filling booth (11) when the level of oxygen in the filling booth (11) falls below an oxygen threshold level.Type: GrantFiled: September 18, 2017Date of Patent: September 8, 2020Assignee: MEXICHEM FLUOR S.A. DE C.V.Inventors: Paul Alan Dowdle, Stuart Corr, Paul Watkinson
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Publication number: 20190241294Abstract: A propellant filling apparatus (10) comprising a filling booth (11) for receiving within it one or more containers for filling with a propellant; a propellant inlet (12) to the filling booth (11) that is capable of supplying propellant into one or more containers within the filling booth (11) from a propellant supply; an inert gas inlet (13) supplying inert gas from an inert gas supply (14) into the filling booth (11), a discharge outlet (16) from the filling booth (11); an extraction fan (17) that is capable of adjusting its fan speed to maintain the pressure of gas in the filling booth (11) to be lower than atmospheric pressure; and an oxygen detector (27) that is capable of detecting levels of oxygen in the filling booth (11) and triggering circulation of inert gas in the filling booth (11) when the level of oxygen in the filling booth (11) falls below an oxygen threshold level.Type: ApplicationFiled: September 18, 2017Publication date: August 8, 2019Inventors: PAUL ALAN DOWDLE, STUART CORR, PAUL WATKINSON
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Patent number: 9364812Abstract: A tar destruction unit for a biomass gasifier is described, comprising a catalyst and/or heating means situated within the free-board section of the gasifier. Also described is a biomass gasifier having such a tar destruction unit.Type: GrantFiled: November 17, 2011Date of Patent: June 14, 2016Assignee: HIGHBURY BIOFUEL TECHNOLOGIES INC.Inventors: Alan Paul Watkinson, Yong Hua Li, Cef Haligva
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Publication number: 20130230433Abstract: A tar destruction unit for a biomass gasifier is described, comprising a catalyst and/or heating means situated within the free-board section of the gasifier. Also described is a biomass gasifier having such a tar destruction unit.Type: ApplicationFiled: November 17, 2011Publication date: September 5, 2013Applicant: HIGHBURY BIOFUEL TECHNOLOGIES INC.Inventors: Alan Paul Watkinson, Yong Hua Li, Cef Haligva
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Patent number: 6916426Abstract: A method of treating an animal waste slurry so as to efficiently extract nutrients, and which can be performed in a zero-discharge system, comprises flocculating the slurry, processing, e.g. filtering, the flocculated slurry to separate liquid from solid material, drying the solid material, processing the liquid to extract ammonium, phosphorous and potassium from the slurry, all within 24 hours, and preferably on average within 12 hours, of production of the waste material by animals. Since the urates of potassium and ammonium in the slurry take a few hours to break down, they remain in crystalline form and therefore a larger portion of the total amount of potassium and ammonium in the slurry can be extracted.Type: GrantFiled: April 11, 2002Date of Patent: July 12, 2005Assignee: ATD Waste Systems Inc.Inventors: Victor Van Slyke, Hubert Timmenga, Steve Helle, Paul Watkinson, Xiaotao Bi
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Publication number: 20020158024Abstract: A method of treating an animal waste slurry so as to efficiently extract nutrients, and which can be performed in a zero-discharge system, comprises flocculating the slurry, processing, e.g. filtering, the flocculated slurry to separate liquid from solid material, drying the solid material, processing the liquid to extract ammonium, phosphorous and potassium from the slurry, all within 24 hours, and preferably on average within 12 hours, of production of the waste material by animals. Since the urates of potassium and ammonium in the slurry take a few hours to break down, they remain in crystalline form and therefore a larger portion of the total amount of potassium and ammonium in the slurry can be extracted.Type: ApplicationFiled: April 11, 2002Publication date: October 31, 2002Inventors: Victor Van Slyke, Hubert Timmenga, Steve Helle, Paul Watkinson, Xiaotao Bi
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Patent number: 4118305Abstract: A novel electrolytic cell is described for carrying out electrochemical reactions in which a gas and a liquid electrolyte flow co-currently through a fluid permeable conductive mass which acts as an electrode. The cell has an anode and cathode in spaced apart relationship, with one electrode being in the form of a fluid permeable conductive mass e.g. a porous matrix or a packed bed of graphite particles, separated from the counter electrode by a barrier wall. This barrier wall can be either anion specific membrane dividing the cell into separate cathode and anode chambers or a porous insulating wall permitting flow of electrolyte between the cathode and anode. A liquid electrolyte and a gas are passed co-currently through the electrode bed perpendicular to the current flow and the reaction product is generated in the solution within the electrode bed.Type: GrantFiled: July 12, 1976Date of Patent: October 3, 1978Assignee: Canadian Patents and Development LimitedInventors: Colin William Oloman, Alan Paul Watkinson
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Patent number: 3969201Abstract: A novel electrolytic cell and process are described for producing alkaline peroxide solutions. The cell has an anode and cathode in spaced apart relationship, with the cathode being in the form of a fluid permeable conductive mass e.g. a packed bed of graphite particles, separated from the anode by a barrier wall. This barrier wall can be either a cation specific membrane dividing the cell into separate cathode and anode chambers or an insulating mesh permitting free flow of electrolyte between the cathode and anode. An aqueous alkaline electrolyte and oxygen are passed through the cathode bed and the peroxide is generated in the solution within the cathode bed. The alkaline peroxide obtained is directly usable in wood pulp bleaching operations.Type: GrantFiled: January 13, 1975Date of Patent: July 13, 1976Assignee: Canadian Patents and Development LimitedInventors: Colin William Oloman, Alan Paul Watkinson
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Patent number: 3941867Abstract: Molybdenite or MoS.sub.2 materials, particularly finely divided flotation concentrates, are oxidized (roasted) to form molybdenum trioxide in a continuous composite fluidized bed containing non-elutriated refractory solids. A relatively high recycle ratio of oxidized calcine to feed is maintained for best results. The temperature of the circulated oxidized solids is maintained high to avoid sticking and deposition problems. High throughputs and high conversions have been achieved, with the product having a low sulfur content.Type: GrantFiled: September 4, 1974Date of Patent: March 2, 1976Assignee: Canadian Patents and Development LimitedInventors: Igor A. Wilkomirsky, Alan Paul Watkinson, J. Keith Brimacombe