US20150104748A1 - Electrodynamic combustion control (ecc) technology for biomass and coal systems - Google Patents

Electrodynamic combustion control (ecc) technology for biomass and coal systems Download PDF

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Publication number
US20150104748A1
US20150104748A1 US14/514,372 US201414514372A US2015104748A1 US 20150104748 A1 US20150104748 A1 US 20150104748A1 US 201414514372 A US201414514372 A US 201414514372A US 2015104748 A1 US2015104748 A1 US 2015104748A1
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Prior art keywords
solid fuel
voltage signal
combustion system
field electrode
voltage
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US14/514,372
Inventor
Jesse C. Dumas
Joseph Colannino
Igor A. Krichtafovitch
Roberto Ruiz
Christopher A. Wiklof
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Clearsign Technologies Corp
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Clearsign Combustion Corp
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Priority to US14/514,372 priority Critical patent/US20150104748A1/en
Assigned to CLEARSIGN COMBUSTION CORPORATION reassignment CLEARSIGN COMBUSTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COLANNINO, JOSEPH, DUMAS, JESSE C., KRICHTAFOVICH, IGOR A., RUIZ, ROBERTO, WIKLOF, CHRISTOPHER A.
Publication of US20150104748A1 publication Critical patent/US20150104748A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F23C99/001—Applying electric means or magnetism to combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2208/00—Control devices associated with burners
    • F23D2208/10—Sensing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/04—Flame sensors sensitive to the colour of flames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F23N2229/20—Camera viewing

Definitions

  • Heterogeneous combustion systems such as biomass and coal combustion systems are prone to generate particulate matter and oxides of nitrogen (NOx), especially for grate-fired stoker systems that tend to have buoyancy-dominated flames. Poorer mixing of heterogeneous buoyancy-dominated flames (as compared to homogenous combustion with high-momentum gas flames) exacerbates particulate matter, carbon monoxide (CO), and unburned hydrocarbons.
  • CO carbon monoxide
  • the relatively slow speed of char oxidation impedes the overall oxidation process. To reduce unburned hydrocarbons and enhance char oxidation, excess air is increased, but at the expense of higher NOx production. What is needed is a method of enhancing mixing for solid-fuel flames that minimizes required increases in excess oxygen.
  • One embodiment is a solid fuel combustion system including a solid fuel support configured to hold a solid fuel for a combustion reaction and a voltage source coupled to the solid fuel support.
  • the solid fuel combustion system further includes a field electrode coupled to the voltage source and disposed in or adjacent to a combustion reaction region above the solid fuel support.
  • the voltage source is configured to output a first voltage signal to the solid fuel support and a second voltage signal to the first field electrode.
  • the field electrode can apply an electric field to the combustion reaction.
  • the application of an electric field has been found by the inventors to improve characteristics of the combustion reaction.
  • the electric field can cause the combustion reaction to burn more vigorously, to output less oxides of nitrogen (NOx), and/or to output less carbon monoxide.
  • NOx oxides of nitrogen
  • One embodiment is a method including initiating a combustion reaction of a solid fuel positioned on a solid fuel support and applying a first voltage signal to the solid fuel support. The method further includes applying a second voltage signal to a first field electrode disposed in or adjacent to the combustion reaction above the solid fuel support.
  • FIG. 1 is a block diagram of a solid fuel combustion system, according to one embodiment.
  • FIG. 2 is a diagram of a solid fuel combustion system including two field electrodes according to one embodiment.
  • FIGS. 3A-3B are diagrams of solid fuel combustion system including a toroidal electrode, according to one embodiment.
  • FIG. 4 is a diagram of a solid fuel combustion system including an electrode positioned in the combustion reaction, according to one embodiment.
  • FIG. 5 is a flow diagram of a process for operating a solid fuel combustion system, according to one embodiment.
  • FIG. 1 is a block diagram of a solid fuel combustion system 100 , according to one embodiment.
  • the solid fuel combustion system 100 includes a solid fuel support 104 configured to support a solid fuel 102 .
  • the solid fuel 102 sustains a combustion reaction 106 .
  • a voltage source 108 is coupled to the solid fuel support 104 by an electrical connector 115 .
  • a field electrode 110 is positioned near the combustion reaction 106 .
  • the field electrode 110 is coupled to the voltage source 108 by an electrical connector 113 .
  • a control circuit 112 is coupled to the voltage source 108 .
  • the combustion system 100 utilizes the field electrode 110 , the voltage source 108 , and the solid fuel support 104 to electrically enhance characteristics of the combustion reaction 106 .
  • the voltage source 108 is a high voltage source that can apply a high voltage between the solid fuel support 104 and the field electrode 110 .
  • the voltage source 108 applies a first voltage signal to the solid fuel support 104 .
  • the voltage source 108 concurrently supplies a second voltage signal to the field electrode 110 . There is a high voltage difference between the first voltage signal and the second voltage signal.
  • an electric field is generated in a combustion region above the solid fuel support 104 .
  • the electric field can have various enhancing effects on the combustion reaction 106 .
  • the electric field is selected to cause the combustion reaction 106 to burn more vigorously than it would in the absence of the electric field.
  • the more vigorous burning can cause a reduction in harmful or undesirable byproducts of the combustion reaction 106 .
  • the electric field can cause a reduction in the output of oxides of nitrogen (NOx) and carbon monoxide (CO) produced by the combustion reaction 106 .
  • the first voltage signal is ground, while the second voltage signal is a high voltage with respect to ground.
  • the second voltage signal is ground while the first voltage signal is a high voltage signal with respect to ground.
  • the first and second voltage signals have opposite polarities from each other.
  • the first and second voltage signals can be DC signals or time varying signals.
  • the time varying signals can be a chopped DC waveform, an AC waveform, a DC offset AC waveform, or any other suitable voltage signal.
  • the peak-to-peak voltage difference between the first and second voltage signals is greater than or equal to 40,000 V.
  • the combustion system 100 requires low power. Less than 0.1% of the thermal output of the combustion reaction 106 is generally sufficient to achieve desirable benefits.
  • the electric field influences ions generated as a natural byproduct of the combustion process. It is possible that the ion population is enhanced by the presence of a strong electric field. These ions influence bulk mixing through the combustion volume by collision and transfer of momentum to the surrounding neutral species. Benefits include reduced particulate matter, greater luminosity, and improved flame stability. Additional benefits can include enhanced heat transfer with flame and heat transfer surface of opposite polarity, retarded heat transfer with flame and heat transfer surface of like polarity, manipulation of plume direction—thought to be caused by response of H30+ in the flue gas to an electric field. Thermal redistribution over conductive surfaces such as boiler and process tubes can also be improved. Furthermore, manipulation of the combustion reaction 106 by an electric field can promote a qualitative reduction of soot, and quantitative reduction of opacity.
  • the field electrode 110 is metal.
  • the field electrode can be metal covered in porcelain.
  • the field electrode 110 can also include silicon carbide.
  • the field electrode 110 includes an electrical conductor covered by an electrical insulating material such as fused quartz. Electrically insulating the conductive field electrode 110 can assist in preventing short circuits.
  • the solid fuel support 104 is a conductive grate on which the sold fuel 102 rests.
  • the combustion system 100 is a combustible substance solid such as biomass, coal, a pulverized coal furnace, resource derived fuel (RDF), municipal solid waste (MSW), etc.
  • a combustible substance solid such as biomass, coal, a pulverized coal furnace, resource derived fuel (RDF), municipal solid waste (MSW), etc.
  • FIG. 2 is a diagram of a solid fuel combustion system 200 , according to one embodiment.
  • the solid fuel combustion system 200 includes a combustion reaction 106 of a solid fuel 102 held by a solid fuel support 104 .
  • the combustion system 200 further includes two field electrodes 210 a, 210 b coupled to the voltage source 108 .
  • the voltage source 108 is further coupled to the solid fuel support 104 and control circuit 112 .
  • the voltage source 108 applies a first voltage signal to the solid fuel support 104 via an electrical connector 115 .
  • the voltage source 108 applies a second voltage signal to the field electrode 210 a via an electrical connector 113 b.
  • the high voltage between the field electrode 210 a and the solid fuel support 104 generates an electric field in the vicinity of the combustion reaction 106 .
  • the voltage source 108 applies the second voltage signal to the field electrode 210 b via an electrical connector 113 a at the same time that the second voltage signal is applied to the field electrode 210 a via the electrical connector 113 b.
  • Applying the second voltage signal to both the field electrode 210 a and the field electrode 210 b can have the effect of broadening the combustion reaction 106 toward both the field electrode 210 a and the field electrode 210 b. This can help to more fully combust the solid fuel 102 .
  • the voltage source 108 applies a second voltage to only one of the field electrodes 210 a, 210 b. This will cause the combustion reaction 106 to be drawn toward the field electrode 210 a or 210 b to which the second voltage signal has been applied.
  • charges are introduced into the combustion reaction 106 to enhance manipulation of the combustion reaction by the field electrodes 210 a, 210 b. Electrons are easily donated to or abstracted from a flame electronically to leave a charged volume amenable to manipulation by electric fields.
  • the flame may be charged by direct contact with an electrode.
  • a charged pilot flame may convey charge to a larger main flame.
  • flames can be remotely charged through space, for example by applying a voltage to a corona
  • FIG. 3A is a diagram of a solid fuel combustion system 300 , according to one embodiment.
  • the solid fuel combustion system 300 includes a combustion reaction 106 of a solid fuel 102 held by a solid fuel support 104 .
  • the combustion system 300 further includes a toroidal field electrode 310 positioned above the combustion reaction 106 and coupled to the voltage source 108 .
  • the voltage source 108 is further coupled to the solid fuel support 104 via an electrical connector 115 and control circuit 112 .
  • the voltage source 108 can apply a first voltage signal to the solid fuel support 104 via the electrical connector 115 .
  • the voltage source 108 applies a second voltage signal to the toroidal field electrode 310 via an electrical connector 113 .
  • the high-voltage between the toroidal field electrode 310 and the solid fuel support 104 generates an electric field in the vicinity of the combustion reaction 106 .
  • the first and second voltage signals have not yet been applied to the solid fuel support 102 and the toroidal field electrode 310 .
  • the combustion reaction 106 is comparatively long and extends nearly to the toroidal field electrode 310 .
  • FIG. 3B is a diagram of the solid fuel combustion system 300 in which the first and second voltage signals have been applied to the solid fuel support 104 and the toroidal field electrode 310 ., according to an embodiment.
  • the high-voltage between the toroidal field electrode 310 and the solid fuel support 104 has the effect of contracting the length of the combustion reaction 106 . This can greatly enhance combustion of the solid fuel 102 and can greatly reduce undesirable byproducts of the combustion reaction 106 .
  • FIG. 4 is a diagram of a solid fuel combustion system 400 , according to one embodiment.
  • the solid fuel combustion system 400 includes a solid fuel 102 sustaining a combustion reaction 106 and being held by a solid fuel support 104 .
  • the combustion system 400 further includes a charging electrode 410 positioned above the combustion reaction 106 and coupled to the voltage source 108 via an electrical connector 113 .
  • the voltage source 108 is further coupled to the solid fuel support 104 via an electrical connector 115 and control circuit 112 .
  • the voltage source 108 can apply a first voltage signal to the solid fuel support 104 .
  • the voltage source 108 applies a second voltage signal to the charge electrode 410 .
  • the charge electrode 410 can impart charges and/or a voltage to the combustion reaction 106 .
  • FIG. 5 is a flow diagram of a process 500 for operating a solid fuel combustion system, according to one embodiment.
  • a combustion reaction of a solid fuel is initiated.
  • the first voltage signal is applied to a solid fuel support on which the solid fuel rests.
  • the second voltage signal is applied to the field electrode positioned in or near the combustion reaction.
  • the combustion reaction there is a high voltage difference between the first and second voltage signals.
  • electric field is generated between the solid fuel support and the field electrode.
  • the combustion reaction is therefore subject to the electric field.
  • the electric field serves to enhance the properties of the combustion reaction.
  • the electric field can cause the combustion reaction to output fewer undesirable byproducts such as nitrous oxide and carbon monoxide.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Incineration Of Waste (AREA)

Abstract

A solid fuel combustion system includes a solid fuel support configured to hold a solid fuel for a combustion reaction. A field electrode is positioned above the solid fuel support. A voltage source supplies a first voltage the solid fuel support and a second voltage to the field electrode.

Description

    CROSS REFERENCE TO RELATED APPLICATION
  • The present application claims priority benefit from U.S. Provisional Patent Application No. 61/890,668, entitled “ELECTRODYNAMIC COMBUSTION CONTROL (ECC) TECHNOLOGY FOR BIOMASS AND COAL SYSTEMS”, filed Oct. 14, 2013, (2651-201-02); which, to the extent not inconsistent with the disclosure herein, is incorporated by reference.
    • BACKGROUND
  • Heterogeneous combustion systems such as biomass and coal combustion systems are prone to generate particulate matter and oxides of nitrogen (NOx), especially for grate-fired stoker systems that tend to have buoyancy-dominated flames. Poorer mixing of heterogeneous buoyancy-dominated flames (as compared to homogenous combustion with high-momentum gas flames) exacerbates particulate matter, carbon monoxide (CO), and unburned hydrocarbons. However, even in high-momentum flames such as in pulverized coal combustion, the relatively slow speed of char oxidation impedes the overall oxidation process. To reduce unburned hydrocarbons and enhance char oxidation, excess air is increased, but at the expense of higher NOx production. What is needed is a method of enhancing mixing for solid-fuel flames that minimizes required increases in excess oxygen.
    • SUMMARY
  • One embodiment is a solid fuel combustion system including a solid fuel support configured to hold a solid fuel for a combustion reaction and a voltage source coupled to the solid fuel support. The solid fuel combustion system further includes a field electrode coupled to the voltage source and disposed in or adjacent to a combustion reaction region above the solid fuel support. The voltage source is configured to output a first voltage signal to the solid fuel support and a second voltage signal to the first field electrode.
  • The field electrode can apply an electric field to the combustion reaction. The application of an electric field has been found by the inventors to improve characteristics of the combustion reaction. For example, the electric field can cause the combustion reaction to burn more vigorously, to output less oxides of nitrogen (NOx), and/or to output less carbon monoxide.
  • One embodiment is a method including initiating a combustion reaction of a solid fuel positioned on a solid fuel support and applying a first voltage signal to the solid fuel support. The method further includes applying a second voltage signal to a first field electrode disposed in or adjacent to the combustion reaction above the solid fuel support.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a block diagram of a solid fuel combustion system, according to one embodiment.
  • FIG. 2 is a diagram of a solid fuel combustion system including two field electrodes according to one embodiment.
  • FIGS. 3A-3B are diagrams of solid fuel combustion system including a toroidal electrode, according to one embodiment.
  • FIG. 4 is a diagram of a solid fuel combustion system including an electrode positioned in the combustion reaction, according to one embodiment.
  • FIG. 5 is a flow diagram of a process for operating a solid fuel combustion system, according to one embodiment.
    •  DETAILED DESCRIPTION
  • In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. Other embodiments may be used and/or other changes may be made without departing from the spirit or scope of the disclosure.
  • FIG. 1 is a block diagram of a solid fuel combustion system 100, according to one embodiment. The solid fuel combustion system 100 includes a solid fuel support 104 configured to support a solid fuel 102. The solid fuel 102 sustains a combustion reaction 106. A voltage source 108 is coupled to the solid fuel support 104 by an electrical connector 115. A field electrode 110 is positioned near the combustion reaction 106. The field electrode 110 is coupled to the voltage source 108 by an electrical connector 113. A control circuit 112 is coupled to the voltage source 108.
  • The combustion system 100 utilizes the field electrode 110, the voltage source 108, and the solid fuel support 104 to electrically enhance characteristics of the combustion reaction 106. The voltage source 108 is a high voltage source that can apply a high voltage between the solid fuel support 104 and the field electrode 110. In particular, the voltage source 108 applies a first voltage signal to the solid fuel support 104. The voltage source 108 concurrently supplies a second voltage signal to the field electrode 110. There is a high voltage difference between the first voltage signal and the second voltage signal.
  • With the high voltage applied between the solid fuel support 104 and the field electrode 110, an electric field is generated in a combustion region above the solid fuel support 104. The electric field can have various enhancing effects on the combustion reaction 106.
  • In one embodiment, the electric field is selected to cause the combustion reaction 106 to burn more vigorously than it would in the absence of the electric field. The more vigorous burning can cause a reduction in harmful or undesirable byproducts of the combustion reaction 106. In particular, the electric field can cause a reduction in the output of oxides of nitrogen (NOx) and carbon monoxide (CO) produced by the combustion reaction 106.
  • In one embodiment, the first voltage signal is ground, while the second voltage signal is a high voltage with respect to ground. Alternatively, the second voltage signal is ground while the first voltage signal is a high voltage signal with respect to ground. In one embodiment, the first and second voltage signals have opposite polarities from each other.
  • The first and second voltage signals can be DC signals or time varying signals. For example, the time varying signals can be a chopped DC waveform, an AC waveform, a DC offset AC waveform, or any other suitable voltage signal. In one embodiment the peak-to-peak voltage difference between the first and second voltage signals is greater than or equal to 40,000 V.
  • In spite of the high voltages, the combustion system 100 requires low power. Less than 0.1% of the thermal output of the combustion reaction 106 is generally sufficient to achieve desirable benefits.
  • The electric field influences ions generated as a natural byproduct of the combustion process. It is possible that the ion population is enhanced by the presence of a strong electric field. These ions influence bulk mixing through the combustion volume by collision and transfer of momentum to the surrounding neutral species. Benefits include reduced particulate matter, greater luminosity, and improved flame stability. Additional benefits can include enhanced heat transfer with flame and heat transfer surface of opposite polarity, retarded heat transfer with flame and heat transfer surface of like polarity, manipulation of plume direction—thought to be caused by response of H30+ in the flue gas to an electric field. Thermal redistribution over conductive surfaces such as boiler and process tubes can also be improved. Furthermore, manipulation of the combustion reaction 106 by an electric field can promote a qualitative reduction of soot, and quantitative reduction of opacity.
  • In one embodiment, the field electrode 110 is metal. Alternatively, the field electrode can be metal covered in porcelain. The field electrode 110 can also include silicon carbide.
  • In one embodiment, the field electrode 110 includes an electrical conductor covered by an electrical insulating material such as fused quartz. Electrically insulating the conductive field electrode 110 can assist in preventing short circuits.
  • In one embodiment, the solid fuel support 104 is a conductive grate on which the sold fuel 102 rests.
  • In one embodiment, the combustion system 100 is a combustible substance solid such as biomass, coal, a pulverized coal furnace, resource derived fuel (RDF), municipal solid waste (MSW), etc.
  • FIG. 2 is a diagram of a solid fuel combustion system 200, according to one embodiment. The solid fuel combustion system 200 includes a combustion reaction 106 of a solid fuel 102 held by a solid fuel support 104. The combustion system 200 further includes two field electrodes 210 a, 210 b coupled to the voltage source 108. The voltage source 108 is further coupled to the solid fuel support 104 and control circuit 112.
  • The voltage source 108 applies a first voltage signal to the solid fuel support 104 via an electrical connector 115. The voltage source 108 applies a second voltage signal to the field electrode 210 a via an electrical connector 113 b. There is a high voltage difference between the first voltage signal and the second voltage signal. As described previously, the high voltage between the field electrode 210 a and the solid fuel support 104 generates an electric field in the vicinity of the combustion reaction 106.
  • In one embodiment, the voltage source 108 applies the second voltage signal to the field electrode 210 b via an electrical connector 113 a at the same time that the second voltage signal is applied to the field electrode 210 a via the electrical connector 113 b. Applying the second voltage signal to both the field electrode 210 a and the field electrode 210 b can have the effect of broadening the combustion reaction 106 toward both the field electrode 210 a and the field electrode 210 b. This can help to more fully combust the solid fuel 102.
  • In one embodiment, the voltage source 108 applies a second voltage to only one of the field electrodes 210 a, 210 b. This will cause the combustion reaction 106 to be drawn toward the field electrode 210 a or 210 b to which the second voltage signal has been applied.
  • In one embodiment charges are introduced into the combustion reaction 106 to enhance manipulation of the combustion reaction by the field electrodes 210 a, 210 b. Electrons are easily donated to or abstracted from a flame electronically to leave a charged volume amenable to manipulation by electric fields. For example, the flame may be charged by direct contact with an electrode. Alternatively, a charged pilot flame may convey charge to a larger main flame. Additionally or alternatively, flames can be remotely charged through space, for example by applying a voltage to a corona
  • FIG. 3A is a diagram of a solid fuel combustion system 300, according to one embodiment. The solid fuel combustion system 300 includes a combustion reaction 106 of a solid fuel 102 held by a solid fuel support 104. The combustion system 300 further includes a toroidal field electrode 310 positioned above the combustion reaction 106 and coupled to the voltage source 108. The voltage source 108 is further coupled to the solid fuel support 104 via an electrical connector 115 and control circuit 112.
  • The voltage source 108 can apply a first voltage signal to the solid fuel support 104 via the electrical connector 115. The voltage source 108 applies a second voltage signal to the toroidal field electrode 310 via an electrical connector 113. There is a high voltage difference between the first voltage signal and the second voltage signal. The high-voltage between the toroidal field electrode 310 and the solid fuel support 104 generates an electric field in the vicinity of the combustion reaction 106.
  • In FIG. 3A, the first and second voltage signals have not yet been applied to the solid fuel support 102 and the toroidal field electrode 310. Without the high-voltage applied between the toroidal field electrode 310 and a solid fuel support 102, the combustion reaction 106 is comparatively long and extends nearly to the toroidal field electrode 310.
  • FIG. 3B is a diagram of the solid fuel combustion system 300 in which the first and second voltage signals have been applied to the solid fuel support 104 and the toroidal field electrode 310., according to an embodiment. The high-voltage between the toroidal field electrode 310 and the solid fuel support 104 has the effect of contracting the length of the combustion reaction 106. This can greatly enhance combustion of the solid fuel 102 and can greatly reduce undesirable byproducts of the combustion reaction 106.
  • FIG. 4 is a diagram of a solid fuel combustion system 400, according to one embodiment. The solid fuel combustion system 400 includes a solid fuel 102 sustaining a combustion reaction 106 and being held by a solid fuel support 104.
  • The combustion system 400 further includes a charging electrode 410 positioned above the combustion reaction 106 and coupled to the voltage source 108 via an electrical connector 113. The voltage source 108 is further coupled to the solid fuel support 104 via an electrical connector 115 and control circuit 112.
  • The voltage source 108 can apply a first voltage signal to the solid fuel support 104. The voltage source 108 applies a second voltage signal to the charge electrode 410. There is a high voltage difference between the first voltage signal and the second voltage signal. The charge electrode 410 can impart charges and/or a voltage to the combustion reaction 106.
  • FIG. 5 is a flow diagram of a process 500 for operating a solid fuel combustion system, according to one embodiment. At 502 a combustion reaction of a solid fuel is initiated. At 504 the first voltage signal is applied to a solid fuel support on which the solid fuel rests. At 506 the second voltage signal is applied to the field electrode positioned in or near the combustion reaction.
  • In one embodiment, there is a high voltage difference between the first and second voltage signals. Thus, electric field is generated between the solid fuel support and the field electrode. The combustion reaction is therefore subject to the electric field. The electric field serves to enhance the properties of the combustion reaction. In particular, the electric field can cause the combustion reaction to output fewer undesirable byproducts such as nitrous oxide and carbon monoxide.
  • While various aspects and embodiments have been disclosed herein, other aspects and embodiments are contemplated. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Claims (35)

What is claimed is:
1. A solid fuel combustion system, comprising:
a solid fuel support configured to hold a solid fuel for a combustion reaction;
a voltage source coupled to the solid fuel support and configured to output a first voltage signal to the solid fuel support; and
a first field electrode coupled to the voltage source and disposed in or adjacent to a combustion reaction region above the solid fuel support, the voltage source configured to output a second voltage signal to the first field electrode while the first voltage signal is applied to the solid fuel support, the second voltage signal being different than the first voltage signal.
2. The solid fuel combustion system of claim 1, wherein the first field electrode is configured to apply an electric field to the combustion region above the solid fuel support when receiving the second voltage signal.
3. The solid fuel combustion system of claim 2, wherein the electric field is selected to cause the combustion reaction to burn more vigorously than in an absence of the electric field.
4. The solid fuel combustion system of claim 2, wherein the electric field is selected to cause the combustion reaction supported by the solid fuel to output reduced oxides of nitrogen (NOx) than in an absence of the electric field.
5. The solid fuel combustion system of claim 2, wherein the electric field is selected to cause the combustion reaction to evolve reduced carbon monoxide (CO) than in an absence of the electric field.
6. The solid fuel combustion system of claim 1, wherein the second voltage signal is ground.
7. The solid fuel combustion system of claim 1, wherein the second voltage signal has an opposite polarity from the first voltage signal.
8. The solid fuel combustion system of claim 7, wherein the second voltage signal comprises a high voltage opposite in polarity from the first voltage signal.
9. The solid fuel combustion system of claim 1, wherein the voltage signal is a first time-varying voltage signal and the second voltage signal is opposite in polarity from the first time-varying voltage signal.
10. The solid fuel combustion system of claim 9, wherein the first time-varying voltage signal comprises a chopped DC waveform.
11. The solid fuel combustion system of claim 9, wherein the first time-varying voltage signal comprises a DC offset AC waveform.
12. The solid fuel combustion system of claim 9, wherein the first time-varying voltage signal comprises an AC waveform.
13. The solid fuel combustion system of claim 1, wherein the first field electrode includes a metal.
14. The solid fuel combustion system of claim 1, wherein the first field electrode includes porcelain coated metal.
15. The solid fuel combustion system of claim 1, wherein the first field electrode includes silicon carbide (SiC).
16. The solid fuel combustion system of claim 1, comprising a second field electrode coupled to the voltage source, the first and second field electrodes being disposed in or adjacent to walls of a furnace defining the combustion region above the solid fuel support.
17. The solid fuel combustion system of claim 1, wherein the voltage source is configured output the second voltage signal to the second field electrode.
18. The solid fuel combustion system of claim 1, wherein the solid fuel support is a conductive grate.
19. The solid fuel combustion system of claim 1, wherein the first field electrode is a toroidal field electrode positioned above the solid fuel support.
20. A method comprising:
initiating a combustion reaction of a solid fuel positioned on a solid fuel support;
applying a first voltage signal to the solid fuel support; and
applying a second voltage signal to a first field electrode disposed in or adjacent to the combustion reaction above the solid fuel support.
21. The method of claim 20, wherein the first field electrode has a toroid shape and is positioned above the combustion reaction.
22. The method of claim 21, comprising contracting or extending a length of the combustion reaction by applying the second voltage to the first field electrode.
23. The method of claim 20, comprising expanding or contracting a width of the combustion reaction by applying the second voltage signal to a second field electrode positioned adjacent to the combustion reaction.
24. The method of claim 20, comprising generating an electric field in or near the combustion reaction by applying the first and second voltages to the solid fuel support and the first field electrode, respectively.
25. The method of claim 24, wherein generating the electric field causes the combustion reaction to burn more vigorously than in an absence of the electric field.
26. The method of claim 25, comprising reducing oxides of nitrogen (NOx) produced by the combustion reaction by generating the electric field.
27. The method of claim 24, comprising reducing carbon monoxide (CO) produced by the combustion reaction by generating the electric field.
28. The method of claim 20, wherein either the first or the second voltage signal is ground.
29. The method of claim 20, wherein the second voltage signal is a high voltage opposite in polarity from the first voltage.
30. The method of claim 20, wherein the first voltage signal is a time-varying voltage signal.
31. The method of claim 20, wherein the second voltage signal is a time-varying voltage signal.
32. The method of claim 20, wherein one or both of the first and second voltage signals is a chopped DC waveform.
33. The method of claim 20, wherein one or both of the first and second voltage signals is a DC offset AC waveform.
34. The method of claim 20, wherein the solid fuel is a biomass.
35. The method of claim 20, wherein the solid fuel is coal.
US14/514,372 2013-10-14 2014-10-14 Electrodynamic combustion control (ecc) technology for biomass and coal systems Abandoned US20150104748A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9441834B2 (en) 2012-12-28 2016-09-13 Clearsign Combustion Corporation Wirelessly powered electrodynamic combustion control system
US9494317B2 (en) 2012-09-10 2016-11-15 Clearsign Combustion Corporation Electrodynamic combustion control with current limiting electrical element
US9496688B2 (en) 2012-11-27 2016-11-15 Clearsign Combustion Corporation Precombustion ionization
US9513006B2 (en) 2012-11-27 2016-12-06 Clearsign Combustion Corporation Electrodynamic burner with a flame ionizer
US9664386B2 (en) 2013-03-05 2017-05-30 Clearsign Combustion Corporation Dynamic flame control
US9696031B2 (en) 2012-03-27 2017-07-04 Clearsign Combustion Corporation System and method for combustion of multiple fuels
US9702547B2 (en) 2014-10-15 2017-07-11 Clearsign Combustion Corporation Current gated electrode for applying an electric field to a flame
US9732958B2 (en) 2010-04-01 2017-08-15 Clearsign Combustion Corporation Electrodynamic control in a burner system
US9803855B2 (en) 2013-02-14 2017-10-31 Clearsign Combustion Corporation Selectable dilution low NOx burner
US9909759B2 (en) 2013-03-08 2018-03-06 Clearsign Combustion Corporation System for electrically-driven classification of combustion particles
US10006715B2 (en) 2015-02-17 2018-06-26 Clearsign Combustion Corporation Tunnel burner including a perforated flame holder
US10060619B2 (en) 2012-12-26 2018-08-28 Clearsign Combustion Corporation Combustion system with a grid switching electrode
US10066835B2 (en) 2013-11-08 2018-09-04 Clearsign Combustion Corporation Combustion system with flame location actuation
US10077899B2 (en) 2013-02-14 2018-09-18 Clearsign Combustion Corporation Startup method and mechanism for a burner having a perforated flame holder
US20180292086A1 (en) * 2017-04-06 2018-10-11 Ernst Miklos Method for flame straightening and burner assembly for this purpose
US10125979B2 (en) 2013-05-10 2018-11-13 Clearsign Combustion Corporation Combustion system and method for electrically assisted start-up
US10174938B2 (en) 2014-06-30 2019-01-08 Clearsign Combustion Corporation Low inertia power supply for applying voltage to an electrode coupled to a flame
US10190767B2 (en) 2013-03-27 2019-01-29 Clearsign Combustion Corporation Electrically controlled combustion fluid flow
US10295185B2 (en) 2013-10-14 2019-05-21 Clearsign Combustion Corporation Flame visualization control for electrodynamic combustion control
US10359213B2 (en) 2013-02-14 2019-07-23 Clearsign Combustion Corporation Method for low NOx fire tube boiler
US10364984B2 (en) 2013-01-30 2019-07-30 Clearsign Combustion Corporation Burner system including at least one coanda surface and electrodynamic control system, and related methods
US10364980B2 (en) 2013-09-23 2019-07-30 Clearsign Combustion Corporation Control of combustion reaction physical extent
US10386062B2 (en) 2013-02-14 2019-08-20 Clearsign Combustion Corporation Method for operating a combustion system including a perforated flame holder
US10458647B2 (en) 2014-08-15 2019-10-29 Clearsign Combustion Corporation Adaptor for providing electrical combustion control to a burner
US10514165B2 (en) 2016-07-29 2019-12-24 Clearsign Combustion Corporation Perforated flame holder and system including protection from abrasive or corrosive fuel
US10571124B2 (en) 2013-02-14 2020-02-25 Clearsign Combustion Corporation Selectable dilution low NOx burner
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US10808927B2 (en) 2013-10-07 2020-10-20 Clearsign Technologies Corporation Pre-mixed fuel burner with perforated flame holder
US10823401B2 (en) 2013-02-14 2020-11-03 Clearsign Technologies Corporation Burner system including a non-planar perforated flame holder
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US11460188B2 (en) 2013-02-14 2022-10-04 Clearsign Technologies Corporation Ultra low emissions firetube boiler burner

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11953201B2 (en) 2013-02-14 2024-04-09 Clearsign Technologies Corporation Control system and method for a burner with a distal flame holder
US11047572B2 (en) * 2013-09-23 2021-06-29 Clearsign Technologies Corporation Porous flame holder for low NOx combustion
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US11473774B2 (en) 2015-02-17 2022-10-18 Clearsign Technologies Corporation Methods of upgrading a conventional combustion system to include a perforated flame holder
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WO2016134061A1 (en) 2015-02-17 2016-08-25 Clearsign Combustion Corporation Perforated flame holder with adjustable fuel nozzle
TW201710029A (en) * 2015-09-01 2017-03-16 Ebara Corp Eddy current sensor
US10088153B2 (en) 2015-12-29 2018-10-02 Clearsign Combustion Corporation Radiant wall burner including perforated flame holders
EP3403026B1 (en) 2016-01-13 2021-12-15 ClearSign Technologies Corporation Combustion system comprising a first and a second perforated flame holder, separated by a gap
US10551058B2 (en) 2016-03-18 2020-02-04 Clearsign Technologies Corporation Multi-nozzle combustion assemblies including perforated flame holder, combustion systems including the combustion assemblies, and related methods
US10539326B2 (en) 2016-09-07 2020-01-21 Clearsign Combustion Corporation Duplex burner with velocity-compensated mesh and thickness
US11248963B2 (en) 2017-01-23 2022-02-15 Honeywell International, Inc. Equipment and method for three-dimensional radiance and gas species field estimation in an open combustion environment
EP3814685A4 (en) * 2018-06-28 2022-03-23 ClearSign Technologies Corporation Variable composition gas mixture sensor
EP3683501A1 (en) * 2019-01-17 2020-07-22 ClearSign Technologies Corporation Control system for a burner with perforated flame holder

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604936A (en) * 1946-01-15 1952-07-29 Metal Carbides Corp Method and apparatus for controlling the generation and application of heat
US3358731A (en) * 1966-04-01 1967-12-19 Mobil Oil Corp Liquid fuel surface combustion process and apparatus
US3993362A (en) * 1973-07-19 1976-11-23 Kamins Jerome H Anti-jackknifing and skidding control system
US5702244A (en) * 1994-06-15 1997-12-30 Thermal Energy Systems, Incorporated Apparatus and method for reducing particulate emissions from combustion processes
US5942047A (en) * 1997-04-07 1999-08-24 Jx Crystals Inc. Electric power generator including a thermophotovoltaic cell assembly, a composite ceramic emitter and a flame detection system
US7137808B2 (en) * 2001-08-01 2006-11-21 Siemens Aktiengesellschaft Method and device for influencing combustion processes involving combustibles
US20070020567A1 (en) * 2002-12-23 2007-01-25 Branston David W Method and device for influencing combution processes of fuels
US20080145802A1 (en) * 2004-12-20 2008-06-19 Thomas Hammer Method and Device for Influencing Combustion Processes
US20130004902A1 (en) * 2011-02-09 2013-01-03 Clearsign Combustion Corporation Method and apparatus for electrodynamically driving a charged gas or charged particles entrained in a gas

Family Cites Families (181)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095065A (en) 1933-01-25 1937-10-05 Joseph W Hays Surface combustion process
US3076605A (en) 1959-08-03 1963-02-05 Artemas F Holden Control system for luminous wall furnace
DE1121762B (en) 1960-04-14 1962-01-11 Alberto Wobig Burners for gaseous or liquid fuels
US3004137A (en) 1960-06-07 1961-10-10 Comb And Explosives Res Inc Method and apparatus for the production of high gas temperatures
US3087472A (en) 1961-03-30 1963-04-30 Asakawa Yukichi Method and apparatus for the improved combustion of fuels
GB1042014A (en) 1961-11-10 1966-09-07 Kenneth Payne A fuel burner
US3228614A (en) 1962-06-15 1966-01-11 Hupp Corp Gas fired infra-red heaters
US3224485A (en) 1963-05-06 1965-12-21 Inter Probe Heat control device and method
US3306338A (en) 1965-11-01 1967-02-28 Exxon Research Engineering Co Apparatus for the application of insulated a.c. fields to flares
US3416870A (en) 1965-11-01 1968-12-17 Exxon Research Engineering Co Apparatus for the application of an a.c. electrostatic field to combustion flames
US3749545A (en) 1971-11-24 1973-07-31 Univ Ohio State Apparatus and method for controlling liquid fuel sprays for combustion
FR2232735B1 (en) 1972-05-08 1976-08-06 Antargaz
US3841824A (en) 1972-09-25 1974-10-15 G Bethel Combustion apparatus and process
GB1465785A (en) 1973-03-12 1977-03-02 Tokyo Gas Co Ltd Burner and method of combustion-
US4020388A (en) 1974-09-23 1977-04-26 Massachusetts Institute Of Technology Discharge device
US4111636A (en) * 1976-12-03 1978-09-05 Lawrence P. Weinberger Method and apparatus for reducing pollutant emissions while increasing efficiency of combustion
DE2753750C2 (en) 1977-12-02 1982-12-23 Hoechst Ag, 6000 Frankfurt Device for the surface treatment of foil webs by means of electrical corona discharge
US4910637A (en) 1978-10-23 1990-03-20 Rinoud Hanna Modifying the discharge breakdown
DE2950535A1 (en) 1979-11-23 1981-06-11 BBC AG Brown, Boveri & Cie., Baden, Aargau COMBUSTION CHAMBER OF A GAS TURBINE WITH PRE-MIXING / PRE-EVAPORATING ELEMENTS
US4519770A (en) 1980-06-30 1985-05-28 Alzeta Corp. Firetube boiler heater system
US4413976A (en) 1981-05-15 1983-11-08 Southbend Escan Corporation Igniter for a gas burner
US4483673A (en) 1983-03-07 1984-11-20 Matsushita Electric Industrial Co., Ltd. Catalytic combustion arrangement
JPS60216111A (en) 1984-04-11 1985-10-29 Osaka Gas Co Ltd Heating apparatus of combustion type
US4673349A (en) 1984-12-20 1987-06-16 Ngk Insulators, Ltd. High temperature surface combustion burner
JPS61250413A (en) 1985-04-27 1986-11-07 Nakajima Doukoushiyo:Kk Hot air generator
JPS61265404A (en) 1985-05-17 1986-11-25 Osaka Gas Co Ltd Burner
US4899696A (en) 1985-09-12 1990-02-13 Gas Research Institute Commercial storage water heater process
FR2589555B1 (en) 1985-11-06 1989-11-10 Gaz De France BLOW AIR GAS BURNER
US4643667A (en) 1985-11-21 1987-02-17 Institute Of Gas Technology Non-catalytic porous-phase combustor
FI79622C (en) 1986-01-27 1990-01-10 Nokia Oy Ab FOERFARANDE FOER GENERERING AV I REALTIDSREGLERPARAMETRAR MED HJAELP AV EN VIDEOKAMERA FOER ROEKGENERERANDE FOERBRAENNINGSPROCESSER.
US4773847A (en) 1987-03-13 1988-09-27 Tecogen, Inc. Thermoelectric field burner
US4850862A (en) * 1988-05-03 1989-07-25 Consolidated Natural Gas Service Company, Inc. Porous body combustor/regenerator
JPH03255807A (en) 1990-03-02 1991-11-14 Inax Corp Burner for surface reduction of burned item
US5235667A (en) 1991-05-24 1993-08-10 Casso-Solar Corp. Heating method and assembly utilizing electric heating elements in conjunction with combustion
US5326257A (en) 1992-10-21 1994-07-05 Maxon Corporation Gas-fired radiant burner
US5470222A (en) 1993-06-21 1995-11-28 United Technologies Corporation Heating unit with a high emissivity, porous ceramic flame holder
US5439372A (en) 1993-06-28 1995-08-08 Alzeta Corporation Multiple firing rate zone burner and method
CA2130964C (en) 1993-08-27 2003-06-17 Henry Jack Moore Jr. Water heater with low nox ceramic burner
US5441402A (en) 1993-10-28 1995-08-15 Gas Research Institute Emission reduction
US5409375A (en) 1993-12-10 1995-04-25 Selee Corporation Radiant burner
US5458484A (en) 1994-05-16 1995-10-17 Carrier Corporation Pre-mix flame type burner
GB2290608B (en) 1994-06-16 1998-02-11 British Gas Plc Fuel fired burners
NO180315C (en) 1994-07-01 1997-03-26 Torfinn Johnsen Combustion chamber with equipment to improve combustion and reduce harmful substances in the exhaust gas
US5577905A (en) 1994-11-16 1996-11-26 Robertshaw Controls Company Fuel control system, parts therefor and methods of making and operating the same
US5641282A (en) 1995-02-28 1997-06-24 Gas Research Institute Advanced radiant gas burner and method utilizing flame support rod structure
DE19542918A1 (en) 1995-11-17 1997-05-22 Asea Brown Boveri Device for damping thermoacoustic pressure vibrations
US5899686A (en) 1996-08-19 1999-05-04 Gas Research Institute Gas burner apparatus having a flame holder structure with a contoured surface
JP3054596B2 (en) 1996-10-28 2000-06-19 照夫 新井 burner
US5993192A (en) 1997-09-16 1999-11-30 Regents Of The University Of Minnesota High heat flux catalytic radiant burner
US6470684B2 (en) 2000-04-01 2002-10-29 Alstom Power N.V. Gas turbine engine combustion system
ATE340305T1 (en) 2000-11-22 2006-10-15 Haldor Topsoe As METHOD FOR COMBUSTING HYDROCARBON-RICH FUELS IN A COMBUSTION CHAMBER WITH REDUCED SOOT FORMATION
DE10114903A1 (en) 2001-03-26 2002-10-17 Invent Gmbh Entwicklung Neuer Technologien Burner for a gas / air mixture
US6780378B2 (en) * 2001-06-28 2004-08-24 Gas Technology Institute Method for measuring concentrations of gases and vapors using controlled flames
US6896512B2 (en) 2001-09-19 2005-05-24 Aztec Machinery Company Radiator element
AU2003219092A1 (en) 2002-03-22 2003-10-08 Pyroplasma Kg Fuel combustion device
ITAN20020038A1 (en) 2002-08-05 2004-02-06 Merloni Termosanitari Spa Ora Ariston Thermo Spa LAMBDA VIRTUAL SENSOR COMBUSTION CONTROL SYSTEM.
US6827573B2 (en) 2002-10-25 2004-12-07 Brown & Williamson Tobacco Corporation Gas micro burner
US7243496B2 (en) 2004-01-29 2007-07-17 Siemens Power Generation, Inc. Electric flame control using corona discharge enhancement
US20060141413A1 (en) * 2004-12-27 2006-06-29 Masten James H Burner plate and burner assembly
US7360506B2 (en) 2006-02-13 2008-04-22 American Water Heater Company Low CO water heater
AT504398B1 (en) 2006-10-24 2008-07-15 Windhager Zentralheizung Techn PORENBURNER, AND METHOD FOR OPERATING A PORN BURNER
EP1985926B1 (en) 2007-04-26 2018-09-05 Mitsubishi Hitachi Power Systems, Ltd. Combustion equipment and combustion method
GR1006128B (en) 2007-05-25 2008-11-03 . Higly thermally integrated reformer for hydrogen production.
US20090111063A1 (en) 2007-10-29 2009-04-30 General Electric Company Lean premixed, radial inflow, multi-annular staged nozzle, can-annular, dual-fuel combustor
DE102008006067B4 (en) 2008-01-25 2013-07-04 Viessmann Werke Gmbh & Co Kg Device with a burner head and method for operating a burner
US7944678B2 (en) 2008-09-11 2011-05-17 Robertshaw Controls Company Low voltage power supply for spark igniter and flame sense
US8851882B2 (en) * 2009-04-03 2014-10-07 Clearsign Combustion Corporation System and apparatus for applying an electric field to a combustion volume
DE102009028624A1 (en) 2009-08-18 2011-02-24 Sandvik Intellectual Property Ab radiant burner
JP2011069268A (en) 2009-09-25 2011-04-07 Ngk Insulators Ltd Exhaust gas treatment device
JP5103454B2 (en) 2009-09-30 2012-12-19 株式会社日立製作所 Combustor
EP2309186A2 (en) * 2009-10-07 2011-04-13 John Zink Company, L.L.C. Image sensing system, software, apparatus and method for controlling combustion equipment
FR2951808B1 (en) 2009-10-22 2011-11-18 Gdf Suez RADIANT BURNER WITH INCREASED YIELD, AND METHOD FOR IMPROVING THE YIELD OF A RADIANT BURNER
WO2011088250A2 (en) 2010-01-13 2011-07-21 David Goodson Method and apparatus for electrical control of heat transfer
US9732958B2 (en) 2010-04-01 2017-08-15 Clearsign Combustion Corporation Electrodynamic control in a burner system
US20120135360A1 (en) 2010-11-30 2012-05-31 Fives North American Combustion, Inc. Premix Flashback Control
ES2536128T3 (en) 2011-03-03 2015-05-20 Siemens Aktiengesellschaft Burner installation
US8387399B1 (en) * 2011-09-12 2013-03-05 General Electric Company System and method for controlling a combustor assembly
US9284886B2 (en) 2011-12-30 2016-03-15 Clearsign Combustion Corporation Gas turbine with Coulombic thermal protection
US20140208758A1 (en) 2011-12-30 2014-07-31 Clearsign Combustion Corporation Gas turbine with extended turbine blade stream adhesion
US20160123576A1 (en) 2011-12-30 2016-05-05 Clearsign Combustion Corporation Method and apparatus for enhancing flame radiation in a coal-burner retrofit
WO2013102139A1 (en) 2011-12-30 2013-07-04 Clearsign Combustion Corporation Method and apparatus for enhancing flame radiation
EP2817566A4 (en) 2012-02-22 2015-12-16 Clearsign Comb Corp Cooled electrode and burner system including a cooled electrode
CN104169725B (en) 2012-03-01 2018-04-17 克利尔赛恩燃烧公司 It is configured to the inert electrode interacted electronic with flame and system
US9377195B2 (en) 2012-03-01 2016-06-28 Clearsign Combustion Corporation Inertial electrode and system configured for electrodynamic interaction with a voltage-biased flame
WO2013147956A1 (en) 2012-03-27 2013-10-03 Clearsign Combustion Corporation Multiple fuel combustion system and method
US9366427B2 (en) 2012-03-27 2016-06-14 Clearsign Combustion Corporation Solid fuel burner with electrodynamic homogenization
US9371994B2 (en) 2013-03-08 2016-06-21 Clearsign Combustion Corporation Method for Electrically-driven classification of combustion particles
US9289780B2 (en) 2012-03-27 2016-03-22 Clearsign Combustion Corporation Electrically-driven particulate agglomeration in a combustion system
US20150121890A1 (en) 2012-04-30 2015-05-07 Clearsign Combustion Corporation High velocity combustor
US20130291552A1 (en) 2012-05-03 2013-11-07 United Technologies Corporation Electrical control of combustion
CN104350332B (en) 2012-05-31 2016-11-09 克利尔赛恩燃烧公司 Low NOx is from flame burner
US20130323661A1 (en) 2012-06-01 2013-12-05 Clearsign Combustion Corporation Long flame process heater
WO2013188889A1 (en) 2012-06-15 2013-12-19 Clearsign Combustion Corporation Electrically stabilized down-fired flame reactor
US20130333279A1 (en) 2012-06-19 2013-12-19 Clearsign Combustion Corporation Flame enhancement for a rotary kiln
WO2014005143A1 (en) 2012-06-29 2014-01-03 Clearsign Combustion Corporation Combustion system with a corona electrode
US9702550B2 (en) 2012-07-24 2017-07-11 Clearsign Combustion Corporation Electrically stabilized burner
US9310077B2 (en) 2012-07-31 2016-04-12 Clearsign Combustion Corporation Acoustic control of an electrodynamic combustion system
US8911699B2 (en) 2012-08-14 2014-12-16 Clearsign Combustion Corporation Charge-induced selective reduction of nitrogen
US20140051030A1 (en) 2012-08-16 2014-02-20 Clearsign Combustion Corporation System and sacrificial electrode for applying electricity to a combustion reaction
US20150219333A1 (en) 2012-08-27 2015-08-06 Clearsign Combustion Corporation Electrodynamic combustion system with variable gain electrodes
CN104755842B (en) 2012-09-10 2016-11-16 克利尔赛恩燃烧公司 Use the electronic Combustion System of current limliting electrical equipment
US20140080070A1 (en) 2012-09-18 2014-03-20 Clearsign Combustion Corporation Close-coupled step-up voltage converter and electrode for a combustion system
US20140076212A1 (en) 2012-09-20 2014-03-20 Clearsign Combustion Corporation Method and apparatus for treating a combustion product stream
US20160161115A1 (en) 2012-10-23 2016-06-09 Clearsign Combustion Corporation Burner with electrodynamic flame position control system
US20140162195A1 (en) 2012-10-23 2014-06-12 Clearsign Combustion Corporation System for safe power loss for an electrodynamic burner
WO2014085696A1 (en) 2012-11-27 2014-06-05 Clearsign Combustion Corporation Precombustion ionization
US20170009985A9 (en) 2012-11-27 2017-01-12 Clearsign Combustion Corporation Charged ion flows for combustion control
US9513006B2 (en) 2012-11-27 2016-12-06 Clearsign Combustion Corporation Electrodynamic burner with a flame ionizer
WO2014085720A1 (en) 2012-11-27 2014-06-05 Clearsign Combustion Corporation Multijet burner with charge interaction
US9562681B2 (en) 2012-12-11 2017-02-07 Clearsign Combustion Corporation Burner having a cast dielectric electrode holder
US20140170576A1 (en) 2012-12-12 2014-06-19 Clearsign Combustion Corporation Contained flame flare stack
US20140170569A1 (en) 2012-12-12 2014-06-19 Clearsign Combustion Corporation Electrically controlled combustion system with contact electrostatic charge generation
US20140170571A1 (en) 2012-12-13 2014-06-19 Clearsign Combustion Corporation Combustion control electrode assemblies, systems, and methods of manufacturing and use
US20140170575A1 (en) 2012-12-14 2014-06-19 Clearsign Combustion Corporation Ionizer for a combustion system, including foam electrode structure
WO2014099193A1 (en) 2012-12-21 2014-06-26 Clearsign Combustion Corporation Electrical combustion control system including a complementary electrode pair
CN104838208A (en) 2012-12-26 2015-08-12 克利尔赛恩燃烧公司 Combustion system with grid switching electrode
US9441834B2 (en) 2012-12-28 2016-09-13 Clearsign Combustion Corporation Wirelessly powered electrodynamic combustion control system
US9469819B2 (en) 2013-01-16 2016-10-18 Clearsign Combustion Corporation Gasifier configured to electrodynamically agitate charged chemical species in a reaction region and related methods
US20140196368A1 (en) 2013-01-16 2014-07-17 Clearsign Combustion Corporation Gasifier having at least one charge transfer electrode and methods of use thereof
US10364984B2 (en) 2013-01-30 2019-07-30 Clearsign Combustion Corporation Burner system including at least one coanda surface and electrodynamic control system, and related methods
US20140216401A1 (en) 2013-02-04 2014-08-07 Clearsign Combustion Corporation Combustion system configured to generate and charge at least one series of fuel pulses, and related methods
US20140227649A1 (en) 2013-02-12 2014-08-14 Clearsign Combustion Corporation Method and apparatus for delivering a high voltage to a flame-coupled electrode
US20140227646A1 (en) 2013-02-13 2014-08-14 Clearsign Combustion Corporation Combustion system including at least one fuel flow equalizer
US20140227645A1 (en) 2013-02-14 2014-08-14 Clearsign Combustion Corporation Burner systems configured to control at least one geometric characteristic of a flame and related methods
WO2015123701A1 (en) 2014-02-14 2015-08-20 Clearsign Combustion Corporation Electrically heated burner
CN104937342B (en) 2013-02-14 2017-08-25 克利尔赛恩燃烧公司 The low NO of dilution may be selectedxBurner
CN104884868B (en) 2013-02-14 2018-02-06 克利尔赛恩燃烧公司 Startup method and mechanism for the burner with perforation flameholder
US10458649B2 (en) 2013-02-14 2019-10-29 Clearsign Combustion Corporation Horizontally fired burner with a perforated flame holder
US9377188B2 (en) 2013-02-21 2016-06-28 Clearsign Combustion Corporation Oscillating combustor
US9696034B2 (en) 2013-03-04 2017-07-04 Clearsign Combustion Corporation Combustion system including one or more flame anchoring electrodes and related methods
US9664386B2 (en) 2013-03-05 2017-05-30 Clearsign Combustion Corporation Dynamic flame control
US20140255856A1 (en) * 2013-03-06 2014-09-11 Clearsign Combustion Corporation Flame control in the buoyancy-dominated fluid dynamics region
US20140272731A1 (en) 2013-03-15 2014-09-18 Clearsign Combustion Corporation Flame control in the momentum-dominated fluid dynamics region
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Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604936A (en) * 1946-01-15 1952-07-29 Metal Carbides Corp Method and apparatus for controlling the generation and application of heat
US3358731A (en) * 1966-04-01 1967-12-19 Mobil Oil Corp Liquid fuel surface combustion process and apparatus
US3993362A (en) * 1973-07-19 1976-11-23 Kamins Jerome H Anti-jackknifing and skidding control system
US5702244A (en) * 1994-06-15 1997-12-30 Thermal Energy Systems, Incorporated Apparatus and method for reducing particulate emissions from combustion processes
US5942047A (en) * 1997-04-07 1999-08-24 Jx Crystals Inc. Electric power generator including a thermophotovoltaic cell assembly, a composite ceramic emitter and a flame detection system
US7137808B2 (en) * 2001-08-01 2006-11-21 Siemens Aktiengesellschaft Method and device for influencing combustion processes involving combustibles
US20070020567A1 (en) * 2002-12-23 2007-01-25 Branston David W Method and device for influencing combution processes of fuels
US20080145802A1 (en) * 2004-12-20 2008-06-19 Thomas Hammer Method and Device for Influencing Combustion Processes
US20130004902A1 (en) * 2011-02-09 2013-01-03 Clearsign Combustion Corporation Method and apparatus for electrodynamically driving a charged gas or charged particles entrained in a gas

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US10156356B2 (en) 2018-12-18

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