Method and apparatus for starting up a fuel-fired burner of an emission abatement assembly
First Claim
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1. A method of operating a fuel-fired burner of an emission abatement assembly, the method comprising the steps of:
- detecting a burner startup request,supplying a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request,detecting ignition of the fuel-fired burner,supplying a second flow rate of fuel to the fuel-fired burner for a period of time in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel; and
increasing the flow rate of fuel to the fuel-fired burner at a predetermined ramp rate after the period of time.
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Abstract
A method of starting up a fuel-fired burner of an emission abatement assembly includes lowering the fuel rate being supplied to the burner once flame ignition is detected. The fuel rate is maintained at this lower level as the assembly preheats. Once preheated, the fuel level is ramped up to a predetermined operational fuel level. An emission abatement assembly is also disclosed.
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Citations
20 Claims
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1. A method of operating a fuel-fired burner of an emission abatement assembly, the method comprising the steps of:
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detecting a burner startup request, supplying a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request, detecting ignition of the fuel-fired burner, supplying a second flow rate of fuel to the fuel-fired burner for a period of time in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel; and increasing the flow rate of fuel to the fuel-fired burner at a predetermined ramp rate after the period of time. - View Dependent Claims (2, 3, 4)
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5. A method of operating a fuel-fired burner of an emission abatement assembly, the method comprising the steps of:
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detecting a burner startup request, supplying a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request, detecting ignition of the fuel-fired burner, supplying a second flow rate of fuel to the fuel-fired burner for a predetermined period of time in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel, and increasing the flow rate of fuel to the fuel-fired burner after the predetermined period of time has elapsed. - View Dependent Claims (6, 7)
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8. A method of operating a fuel-fired burner of an emission abatement assembly, the method comprising the steps of:
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detecting a burner startup request, supplying a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request, detecting ignition of the fuel-fired burner, supplying a second flow rate of fuel to the fuel-fired burner until a predetermined temperature within the fuel-fired burner has been achieved in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel, and increasing the flow rate of fuel to the fuel-fired burner after the predetermined temperature within the fuel-fired burner has been achieved. - View Dependent Claims (9, 10)
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11. An emission abatement assembly, comprising:
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a particulate filter, a fuel-fired burner positioned upstream of the particulate filter, an electronically-controlled fuel delivery assembly operable to deliver fuel to the fuel fired burner, and a controller electrically coupled to the fuel delivery assembly, the controller comprising (i) a processor, and (ii) a memory device electrically coupled to the processor, the memory device having stored therein a plurality of instructions which, when executed by the processor, cause the processor to; detect a burner startup request, operate the fuel delivery assembly to supply a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request, detect ignition of the fuel-fired burner, operate the fuel delivery assembly to supply a second flow rate of fuel to the fuel-fired burner for a period of time in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel, and operate the fuel delivery assembly to increase the flow rate of fuel to the fuel-fired burner at a predetermined ramp rate after the period of time. - View Dependent Claims (12, 13, 14)
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15. An emission abatement assembly, comprising:
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a particulate filter, a fuel-fired burner positioned upstream of the particulate filter, an electronically-controlled fuel delivery assembly operable to deliver fuel to the fuel fired burner, and a controller electrically coupled to the fuel delivery assembly, the controller comprising (i) a processor, and (ii) a memory device electrically coupled to the processor, the memory device having stored therein a plurality of instructions which, when executed by the processor, cause the processor to; detect a burner startup request, operate the fuel delivery assembly to supply a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request, detect ignition of the fuel-fired burner, operate the fuel delivery assembly to supply a second flow rate of fuel to the fuel-fired burner for a predetermined period of time in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel, and operate the fuel delivery assembly to increase the flow rate of fuel to the fuel-fired burner after the predetermined period of time has elapsed. - View Dependent Claims (16, 17)
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18. An emission abatement assembly, comprising:
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a particulate filter, a fuel-fired burner positioned upstream of the particulate filter, an electronically-controlled fuel delivery assembly operable to deliver fuel to the fuel fired burner, and a controller electrically coupled to the fuel delivery assembly, the controller comprising (i) a processor, and (ii) a memory device electrically coupled to the processor, the memory device having stored therein a plurality of instructions which, when executed by the processor, cause the processor to; detect a burner startup request, operate the fuel delivery assembly to supply a first flow rate of fuel to the fuel-fired burner in response to detection of the burner startup request, detect ignition of the fuel-fired burner, operate the fuel delivery assembly to supply a second flow rate of fuel to the fuel-fired burner until a predetermined temperature within the fuel-fired burner has been achieved in response to detection of ignition of the fuel-fired burner, the second flow rate of fuel being less than the first flow rate of fuel, and operate the fuel delivery assembly to increase the flow rate of fuel to the fuel-fired burner after the predetermined temperature within the fuel-fired burner has been achieved. - View Dependent Claims (19, 20)
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Specification