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Title: Fuel-flexible burner apparatus and method for fired heaters

Abstract

A burner apparatus for a fired heating system and a method of burner operation. The burner provides stable operation when burning gas fuels having heating values ranging from low to high and accommodates sudden wide changes in the Wobbe value of the fuel delivered to the burner. The burner apparatus includes a plurality of exterior fuel ejectors and has an exterior notch which extends around the burner wall for receiving and combusting a portion of the gas fuel. At least a portion of the hot combustion product gas produced in the exterior notch is delivered through channels formed in the burner wall to the combustion area at the forward end of the burner. As the Wobbe value of the gas fuel decreases, one or more outer series of addition ejectors can be automatically activated as needed to maintain the amount of heat output desired.

Inventors:
; ;  [1]; ; ; ; ; ; ;
  1. (Jamal)
Publication Date:
Research Org.:
ZEECO, INC. Broken Arrow, OK (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1346960
Patent Number(s):
9,593,847
Application Number:
14/197,333
Assignee:
ZEECO, INC. DOEEE
DOE Contract Number:
EE0000069
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Mar 05
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Zink, Darton J., Isaacs, Rex K., Jamaluddin, A. S., Benson, Charles E., Pellizzari, Roberto O., Little, Cody L., Marty, Seth A., Imel, K. Parker, Barnes, Jonathon E., and Parker, Chris S. Fuel-flexible burner apparatus and method for fired heaters. United States: N. p., 2017. Web.
Zink, Darton J., Isaacs, Rex K., Jamaluddin, A. S., Benson, Charles E., Pellizzari, Roberto O., Little, Cody L., Marty, Seth A., Imel, K. Parker, Barnes, Jonathon E., & Parker, Chris S. Fuel-flexible burner apparatus and method for fired heaters. United States.
Zink, Darton J., Isaacs, Rex K., Jamaluddin, A. S., Benson, Charles E., Pellizzari, Roberto O., Little, Cody L., Marty, Seth A., Imel, K. Parker, Barnes, Jonathon E., and Parker, Chris S. Tue . "Fuel-flexible burner apparatus and method for fired heaters". United States. doi:. https://www.osti.gov/servlets/purl/1346960.
@article{osti_1346960,
title = {Fuel-flexible burner apparatus and method for fired heaters},
author = {Zink, Darton J. and Isaacs, Rex K. and Jamaluddin, A. S. and Benson, Charles E. and Pellizzari, Roberto O. and Little, Cody L. and Marty, Seth A. and Imel, K. Parker and Barnes, Jonathon E. and Parker, Chris S.},
abstractNote = {A burner apparatus for a fired heating system and a method of burner operation. The burner provides stable operation when burning gas fuels having heating values ranging from low to high and accommodates sudden wide changes in the Wobbe value of the fuel delivered to the burner. The burner apparatus includes a plurality of exterior fuel ejectors and has an exterior notch which extends around the burner wall for receiving and combusting a portion of the gas fuel. At least a portion of the hot combustion product gas produced in the exterior notch is delivered through channels formed in the burner wall to the combustion area at the forward end of the burner. As the Wobbe value of the gas fuel decreases, one or more outer series of addition ejectors can be automatically activated as needed to maintain the amount of heat output desired.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 14 00:00:00 EDT 2017},
month = {Tue Mar 14 00:00:00 EDT 2017}
}

Patent:

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  • This patent describes a heating appliance employing a surface combustion or radiant burner that burns a combustible gas comprised of a mixture of gaseous fuel and combustion air and that emits radiation while burning the combustible gas, having means for supplying the gaseous fuel to the radiant burner at one or more flow rates and having means for supplying the combustion air to the radiant burner at a variable flow rate, a method of setting the proportion of the gaseous fuel to the combustion air in the combustible gas to a desired proportion. It comprises determining a reference intensity, themore » reference intensity being the intensity of radiation emitted by the radiant burner when the radiant burner is burning a reference combustible gas; setting the gaseous fuel supply means at a given flow rate; sensing the intensity of radiation emitted by the radiant burner while the radiant burner is burning the combustible gas; and controlling the combustion air supply means so as to reach and maintain a flow of combustion air that will produce a resultant combustible gas having such a proportion of gaseous fuel to combustion air that, when the radiant burner burns the resultant combustible gas.« less
  • This patent describes a heating appliance employing a radiant burner that burns a combustible gas comprised of a mixture of gaseous fuel and combustion air and that emits radiation while burning the combustion gas, having means for suppling the gaseous fuel to the radiant burner at at least one flow rate and have means for controlling the rate of supply of the combustion air to the radiant burner, a method of setting the proportion of the gaseous fuel to the combustion air in the combustible gas to a desired proportion. It comprises setting and gaseous fuel supply means at amore » given flow rate; measuring the unmodulated intensity of the radiation; deriving a control partner based on measurements of intensity of the radiation taken while varying the combustion air flow rate; and applying the control parameters to the means for controlling the rate of supply of the combustion air so as to reach and maintain a flow rate of the combustion air that results in the desired proportion.« less
  • The method, in general, includes, is mixing the fuel oil with a diluent, such as steam, vaporizing a portion of the mixed fuel oil in a vaporizer, separating the liquid from the vapor, maintaining the vapor at from about 50/sup 0/ to 300/sup 0/F above the dew point of the mixed vapor and diluent at about 75 to 150 psig, above the pressure downstream of a valve controlling flow of the vapor mixed with diluent, and burning the vapor in a burner designed for natural gas without major modifications to the burner. The temperature and pressure can be maintained bymore » heat from the vaporizer or by adding heat from a superheater.« less
  • A method whereby fuel oil is mixed with a gaseous diluent and partially vaporized, liquids separated out, superheated and burned in a natural gas burner without major modification to the burner is disclosed. The control system is: (1) a liquid level controller sensing the liquid level in the separator to automatically control the flow of the fuel oil to the vaporizer; (2) a ratio flow controller sensing the flow of the fuel oil and of the diluent to the vaporizer to automatically control the flow of the diluent to a set ratio of the flow of the fuel oil; (3)more » a pressure controller sensing the pressure at the vaporizer outlet and downstream overhead to automatically control the heat input to the vaporizer and optionally; (4) a flow control valve set to automatically control the flow of the separator overhead to the burner; and (5) a temperature controller sensing the temperature of the vapor effluent from the superheater to automatically control the heat input to the superheater. The vaporized fuel-diluent should be superheated to 50 to 300/sup 0/F, above the dew point of mixed vapor, preferably 100 to 275/sup 0/F above. The fuel-diluent mixture should be at a steady pressure value between about 5 and 80 psig. as feed to the burner. The preferred diluent is steam.« less
  • A method is described of burning fuel comprising: burning a stream of the fuel in two stages and in the presence of first and second oxygen-containing gases, respectively; the second oxygen-containing gas having a higher concentration of oxygen than the first oxygen-containing gas; the fuel stream being burned in a first of the two stages at a first equivalence ratio of sufficiently greater than about 1.0 so that thermal NO[sub x] formation is inhibited and a combustible mixture comprising unburned and partially oxidized fuel and fuel fragments and radicals is produced for combustion in a second of the two stages;more » and the combustible mixture being burned in the second of the two stages at an equivalence ratio of about 1.0 so that maximum heat is transferred to the first of the two stages to stabilize the combustion therein and the fuel radicals are oxidized at a sufficiently rapid rate by the second oxygen containing gas to inhibit formation of prompt NO[sub x].« less