Patents by Inventor Douglas R. Bull
Douglas R. Bull 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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Patent number: 10696913Abstract: A large-scale fluidized bed biogasifier provided for gasifying biosolids. The biogasifier includes a reactor vessel with a pipe distributor and at least two fuel feed inlets for feeding biosolids into the reactor vessel at a desired fuel feed rate of more than 40 tons per day with an average of about 100 tons per day during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the targeted fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In operation, biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1600° F. (871.1° C.).Type: GrantFiled: December 20, 2019Date of Patent: June 30, 2020Assignee: Aries Gasification, LLCInventors: Renus Kelfkens, Brandon Davis, Paul Cairney, Gerald M. Cox, William P. Jepson, Douglas R. Bull, Ross Patten
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Publication number: 20200140768Abstract: A large-scale fluidized bed biogasifier provided for gasifying biosolids. The biogasifier includes a reactor vessel with a pipe distributor and at least two fuel feed inlets for feeding biosolids into the reactor vessel at a desired fuel feed rate of more than 40 tons per day with an average of about 100 tons per day during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the targeted fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In operation, biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1600° F. (871.1° C.).Type: ApplicationFiled: December 20, 2019Publication date: May 7, 2020Applicant: Aries Gasification, LLCInventors: Renus Kelfkens, Brandon Davis, Paul Cairney, Gerald M. Cox, William P. Jepson, Douglas R. Bull, Ross Patten
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Patent number: 10611973Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. The biogasifier includes a reactor vessel and a feeder for feeding biosolids into the reactor vessel at a desired feed rate during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In a method for gasifying biosolids, biosolids are fed into a fluidized bed reactor. Oxidant gases are applied to the fluidized bed reactor to produce a superficial velocity of producer gas in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1700° F. (926.7° C.) in an oxygen-starved environment having a sub-stoichiometric oxygen level, whereby the biosolids are gasified.Type: GrantFiled: June 18, 2019Date of Patent: April 7, 2020Assignee: Aries Gasification, LLCInventors: Douglas R. Bull, Ross M. Patten, Paul Cairney, Gerald M. Cox, William P. Jepson
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Publication number: 20190359903Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. The biogasifier includes a reactor vessel and a feeder for feeding biosolids into the reactor vessel at a desired feed rate during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In a method for gasifying biosolids, biosolids are fed into a fluidized bed reactor. Oxidant gases are applied to the fluidized bed reactor to produce a superficial velocity of producer gas in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1700° F. (926.7° C.) in an oxygen-starved environment having a sub-stoichiometric oxygen level, whereby the biosolids are gasified.Type: ApplicationFiled: June 18, 2019Publication date: November 28, 2019Applicant: Aries Gasification, LLCInventors: Douglas R. Bull, Ross M. Patten, Paul Cairney, Gerald M. Cox, William P. Jepson
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Publication number: 20180094199Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. A feeder feeds biosolids into a reactor vessel at a desired feed rate during steady-state operation. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s to 3 m/s. The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. and 1700° F. in an oxygen-starved environment having a sub stoichiometric oxygen level, whereby the biosolids are gasified. A burner system having a hooded nozzle below the fluidized bed in the reactor vessel provides high temperature gas to the biogasifier.Type: ApplicationFiled: October 5, 2017Publication date: April 5, 2018Inventors: Douglas R. Bull, Ross M. Patten, Paul CAIRNEY, Gerald M. Cox, William P. Jepson, Benjamin F. Gardner
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Patent number: 9809769Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. The biogasifier includes a reactor vessel and a feeder for feeding biosolids into the reactor vessel at a desired feed rate during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In a method for gasifying biosolids, biosolids are fed into a fluidized bed reactor. Oxidant gases are applied to the fluidized bed reactor to produce a superficial velocity of producer gas in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1700° F. (926.7° C.) in an oxygen-starved environment having a sub-stoichiometric oxygen level, whereby the biosolids are gasified.Type: GrantFiled: December 14, 2015Date of Patent: November 7, 2017Assignee: Aries Gasification, LLCInventors: Douglas R. Bull, Ross M. Patten, Paul Cairney, Gerald M. Cox, William P. Jepson
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Publication number: 20160168492Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. The biogasifier includes a reactor vessel and a feeder for feeding biosolids into the reactor vessel at a desired feed rate during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In a method for gasifying biosolids, biosolids are fed into a fluidized bed reactor. Oxidant gases are applied to the fluidized bed reactor to produce a superficial velocity of producer gas in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1700° F. (926.7° C.) in an oxygen-starved environment having a sub-stoichiometric oxygen level, whereby the biosolids are gasified.Type: ApplicationFiled: December 14, 2015Publication date: June 16, 2016Inventors: Douglas R. Bull, Ross M. Patten, Paul Cairney, Gerald M. Cox, William P. Jepson
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Patent number: 9242219Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. The biogasifier includes a reactor vessel and a feeder for feeding biosolids into the reactor vessel at a desired feed rate during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In a method for gasifying biosolids, biosolids are fed into a fluidized bed reactor. Oxidant gases are applied to the fluidized bed reactor to produce a superficial velocity of producer gas in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1700° F. (926.7° C.) in an oxygen-starved environment having a sub-stoichiometric oxygen level, whereby the biosolids are gasified.Type: GrantFiled: January 30, 2012Date of Patent: January 26, 2016Assignee: PHG Energy, LLCInventors: Douglas R. Bull, Ross M. Patten, Paul Cairney, Gerald M. Cox, William P. Jepson
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Publication number: 20130195727Abstract: A fluidized bed biogasifier is provided for gasifying biosolids. The biogasifier includes a reactor vessel and a feeder for feeding biosolids into the reactor vessel at a desired feed rate during steady-state operation of the biogasifier. A fluidized bed in the base of the reactor vessel has a cross-sectional area that is proportional to at least the fuel feed rate such that the superficial velocity of gas is in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). In a method for gasifying biosolids, biosolids are fed into a fluidized bed reactor. Oxidant gases are applied to the fluidized bed reactor to produce a superficial velocity of producer gas in the range of 0.1 m/s (0.33 ft/s) to 3 m/s (9.84 ft/s). The biosolids are heated inside the fluidized bed reactor to a temperature range between 900° F. (482.2° C.) and 1700° F. (926.7° C.) in an oxygen-starved environment having a sub-stoichiometric oxygen level, whereby the biosolids are gasified.Type: ApplicationFiled: January 30, 2012Publication date: August 1, 2013Applicant: MaxWest Environmental Systems Inc.Inventors: Douglas R. Bull, Ross M. Patten, Paul Cairney, Gerald M. Cox, William P. Jepson