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WO2008078279A2 - A combustion chamber - Google Patents

A combustion chamber Download PDF

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Publication number
WO2008078279A2
WO2008078279A2 PCT/IB2007/055184 IB2007055184W WO2008078279A2 WO 2008078279 A2 WO2008078279 A2 WO 2008078279A2 IB 2007055184 W IB2007055184 W IB 2007055184W WO 2008078279 A2 WO2008078279 A2 WO 2008078279A2
Authority
WO
WIPO (PCT)
Prior art keywords
combustion
gas
combustion gas
combustion chamber
outlet
Prior art date
Application number
PCT/IB2007/055184
Other languages
French (fr)
Other versions
WO2008078279A3 (en
Inventor
Pinar Unsal
Original Assignee
Turk Demir Dokum Fabrikalari Anonim Sirketi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Turk Demir Dokum Fabrikalari Anonim Sirketi filed Critical Turk Demir Dokum Fabrikalari Anonim Sirketi
Publication of WO2008078279A2 publication Critical patent/WO2008078279A2/en
Publication of WO2008078279A3 publication Critical patent/WO2008078279A3/en

Links

Classifications

    • 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 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/06—Baffles or deflectors for air or combustion products; Flame shields in fire-boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F24H8/006—Means for removing condensate from the heater
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/03005—Burners with an internal combustion chamber, e.g. for obtaining an increased heat release, a high speed jet flame or being used for starting the combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/13004—Water draining devices associated with flues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2700/00—Constructional details of combustion chambers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the present invention relates to a combustion chamber wherein the burner in which the air - gas mixture is burned is located at the top and the gas outlet and the water outlet through which combustion products are discharged are located at the bottom, and which has a wall structure in the form of divergent nozzle and convergent nozzle.
  • a mixer providing the pre- mixing of natural gas and air in the combustion chamber, a burner in which the air-gas mixture is burned, a combustion chamber where the movement of the combustion gas is directed and which accommodates the heat exchanger, a heat exchanger inside of which domestic water and outside of which combustion gas circulates, a flue gas outlet which discharges the flue combustion gas from the combustion chamber after the heat exchange is completed and a condensation water outlet which discharges the water generated by the condensation of flue combustion gas from the combustion chamber after the heat exchange is completed.
  • the burner In the combustion chamber, the burner is disposed at the bottom while the outlet for the combustion products is located at the top.
  • the combustion gas generated as a result of the ignition of the natural gas - air mixture in the burner, has a high temperature and high speed at the region where it enters the combustion chamber.
  • the combustion gas which transfers its heat energy at the exchanger, has a fairly low temperature and speed at the outlet of the combustion chamber. Speed of the combustion gas should be increased in order to facilitate discharge thereof.
  • a combustor having a combustion chamber and a nozzle is disclosed in the International patent application No. WO03085243, which is another application within the state of the art.
  • the nozzle comprises a converging portion, a throat and a diverging portion.
  • pressure of the gas at the inlet is low in the said application.
  • location of the burner is at the bottom of the combustion chamber. Additionally, discharge of the combustion gas is realized at the top part of the combustion chamber.
  • the objective of the present invention is to realize a combustion chamber which provides ease for collection of combustion products by performing combustion from top to bottom.
  • Another objective of the invention is to realize a combustion chamber wherein the walls at the burner outlet are designed to be divergent structures with the purpose of ensuring that the combustion gas reaches the optimum speed for heat transfer.
  • Another objective of the invention is to realize a combustion chamber wherein the walls are designed to be convergent structures with the purpose of facilitating discharge of the combustion gas.
  • Figure 1 is the perspective view of the combustion chamber.
  • Figure 2 is the view of the positions of the exchanger and the burner within the combustion chamber.
  • the inventive combustion chamber (1) comprises an inlet (4) where the combustion gas is received, located at the top part of the chamber (1); a burner (5) in the inlet (4) part where the air-gas mixture is burned, a divergent nozzle (2) wall structure applied to enable reduction of the speed of combustion gas at the outlet of the burner (5), an exchanger (6) inside of which domestic water and outside of which combustion gas whose speed is reduced by the divergent (2) wall structure circulates, a convergent nozzle (3) wall structure applied at the outlet of the exchanger (6) to facilitate discharge of the combustion gas, a gas outlet (8) at the lowermost part of the chamber (1) where the combustion gas is discharged and a water outlet (7) through which the condensed water vapor within the combustion gas which transfers its heat in the exchanger (6) is discharged as a fluid.
  • the natural gas - air mixture enters from the inlet (4) located on top of the combustion chamber (1) and is ignited in the burner (5).
  • the burner (5) is placed within the combustion chamber (1) and is located at the upper part of the chamber (1).
  • the combustion gas of high temperature formed in the burner (5) upon ignition is forcedly directed (via the fan on the combustion chamber) from top to the bottom. Thus combustion occurs from top to the bottom. Ease at collection of combustion products is aimed by directing the combustion gas from top to the bottom.
  • Combustion gas formed as a result of the ignition of the natural gas - air mixture in the burner (5) has a high temperature and high speed at the region where it enters the combustion chamber (1).
  • a divergent nozzle (2) form is given to the walls of the combustion chamber (1) at the exit of the burner (5).
  • the divergent nozzle (2) form ensures that the speed of the high speed combustion gas which enters into the combustion chamber (1) from the narrow cross-sectional area is reduced by the widening cross-sectional form.
  • heat transfer begins in the exchanger (6).
  • Temperature and speed of the combustion gas, which transfers its heat energy at the exchanger (6), at the outlet of the combustion chamber (1), are fairly low.
  • Speed of the combustion gas should be increased in order to facilitate discharge thereof.
  • a convergent nozzle (3) form is given to the walls of the combustion chamber (1) at the combustion outlet.
  • the factors influencing the material selection are the combustion temperature of the natural gas - air mixture, combustion pressure of the natural gas - air mixture, acidic value of the condensation water which is a combustion product, thermal expansion coefficient of the material to be selected, galvanic corrosion risk of the material to be selected, formability of the material in accordance with the design.
  • the combustion chamber (1) is a product which may be produced from aluminum material by aluminum injection technology.
  • the type of aluminum material used is determined as Etial 141 type aluminum material, upon consideration of the technical specifications contributed to the material by the alloy ratios within aluminum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gas Burners (AREA)

Abstract

The present invention relates to a combustion chamber (1) comprising a burner (5), in which the air - gas mixture is burned, located at the top, a divergent nozzle (2) wall structure applied to enable reduction of the speed of combustion gas at the outlet of the burner, a heat exchanger (S) inside of which domestic water and outside of which combustion gas circulate and a convergent nozzle (3) wall structure applied at the outled of the heat exchanger to facilitate discharge of the combustion gas.

Description

Description A COMBUSTION CHAMBER
[ 1 ] Field of the Invention
[2] The present invention relates to a combustion chamber wherein the burner in which the air - gas mixture is burned is located at the top and the gas outlet and the water outlet through which combustion products are discharged are located at the bottom, and which has a wall structure in the form of divergent nozzle and convergent nozzle.
[3] Background of the Invention
[4] For the natural gas to provide heating, it should combust in the most efficient way and should heat the domestic water with this combustion gas. In the systems created with this purpose, there are provided the following parts: a mixer providing the pre- mixing of natural gas and air in the combustion chamber, a burner in which the air-gas mixture is burned, a combustion chamber where the movement of the combustion gas is directed and which accommodates the heat exchanger, a heat exchanger inside of which domestic water and outside of which combustion gas circulates, a flue gas outlet which discharges the flue combustion gas from the combustion chamber after the heat exchange is completed and a condensation water outlet which discharges the water generated by the condensation of flue combustion gas from the combustion chamber after the heat exchange is completed.
[5] In the combustion chamber, the burner is disposed at the bottom while the outlet for the combustion products is located at the top. The combustion gas, generated as a result of the ignition of the natural gas - air mixture in the burner, has a high temperature and high speed at the region where it enters the combustion chamber. The combustion gas, which transfers its heat energy at the exchanger, has a fairly low temperature and speed at the outlet of the combustion chamber. Speed of the combustion gas should be increased in order to facilitate discharge thereof.
[6] The USA patent application No. US7111449, which is a state of the art, discloses steam boilers which have various embodiments. It has a convergent and divergent structure which influences the change in the speed of the gas.
[7] The USA patent application No. US2003013059, in which another application within the state of the art is described, discloses conical combustion chambers where gas is used for fuel. With its convergent and divergent structure, it can be structured in different forms concentrically.
[8] A combustor having a combustion chamber and a nozzle is disclosed in the International patent application No. WO03085243, which is another application within the state of the art. The nozzle comprises a converging portion, a throat and a diverging portion. However pressure of the gas at the inlet is low in the said application. [9] In applications known in the art, location of the burner is at the bottom of the combustion chamber. Additionally, discharge of the combustion gas is realized at the top part of the combustion chamber.
[10] Summary of the Invention
[11] The objective of the present invention is to realize a combustion chamber which provides ease for collection of combustion products by performing combustion from top to bottom.
[12] Another objective of the invention is to realize a combustion chamber wherein the walls at the burner outlet are designed to be divergent structures with the purpose of ensuring that the combustion gas reaches the optimum speed for heat transfer.
[13] Another objective of the invention is to realize a combustion chamber wherein the walls are designed to be convergent structures with the purpose of facilitating discharge of the combustion gas.
[14] Detailed Description of the Invention
[15] The combustion chamber realized to fulfill the objectives of the present invention is illustrated in the accompanying figures, in which;
[16] Figure 1 is the perspective view of the combustion chamber.
[17] Figure 2 is the view of the positions of the exchanger and the burner within the combustion chamber.
[18] The parts shown in the figures are numbered individually where the numbers refer to the following:
[19] 1. Combustion chamber
[20] 2. Divergent nozzle
[21] 3. Convergent nozzle
[22] 4. Inlet
[23] 5. Burner
[24] 6. Heat exchanger
[25] 7. Water outlet
[26] 8. Gas outlet
[27] The inventive combustion chamber (1) comprises an inlet (4) where the combustion gas is received, located at the top part of the chamber (1); a burner (5) in the inlet (4) part where the air-gas mixture is burned, a divergent nozzle (2) wall structure applied to enable reduction of the speed of combustion gas at the outlet of the burner (5), an exchanger (6) inside of which domestic water and outside of which combustion gas whose speed is reduced by the divergent (2) wall structure circulates, a convergent nozzle (3) wall structure applied at the outlet of the exchanger (6) to facilitate discharge of the combustion gas, a gas outlet (8) at the lowermost part of the chamber (1) where the combustion gas is discharged and a water outlet (7) through which the condensed water vapor within the combustion gas which transfers its heat in the exchanger (6) is discharged as a fluid.
[28] The natural gas - air mixture enters from the inlet (4) located on top of the combustion chamber (1) and is ignited in the burner (5). The burner (5) is placed within the combustion chamber (1) and is located at the upper part of the chamber (1). The combustion gas of high temperature formed in the burner (5) upon ignition, is forcedly directed (via the fan on the combustion chamber) from top to the bottom. Thus combustion occurs from top to the bottom. Ease at collection of combustion products is aimed by directing the combustion gas from top to the bottom.
[29] As a result of the combustion, as the combustion gas transfers its heat, water vapor within the combustion gas condenses and takes the form of fluid water. With the design of the combustion chamber (1) which directs the movement of the combustion gas from top to the bottom, it is benefited from gravity in collection of condensed water.
[30] Combustion gas formed as a result of the ignition of the natural gas - air mixture in the burner (5), has a high temperature and high speed at the region where it enters the combustion chamber (1). With the purpose of reducing this speed and ensuring that the combustion gas reaches the optimum speed for heat transfer around the exchanger (6), a divergent nozzle (2) form is given to the walls of the combustion chamber (1) at the exit of the burner (5).
[31] The divergent nozzle (2) form ensures that the speed of the high speed combustion gas which enters into the combustion chamber (1) from the narrow cross-sectional area is reduced by the widening cross-sectional form. Upon arrival of the gas with the appropriate speed to the exchanger (6), heat transfer begins in the exchanger (6). Temperature and speed of the combustion gas, which transfers its heat energy at the exchanger (6), at the outlet of the combustion chamber (1), are fairly low. Speed of the combustion gas should be increased in order to facilitate discharge thereof. For that purpose a convergent nozzle (3) form is given to the walls of the combustion chamber (1) at the combustion outlet.
[32] By means of the convergent nozzle (3) form, the gas is ensured to travel from the wide cross-sectional area to the narrow cross-sectional area. This way, speed of the gas increases.
[33] Upon determination of the shape and configuration of the combustion chamber, the factors influencing the material selection are the combustion temperature of the natural gas - air mixture, combustion pressure of the natural gas - air mixture, acidic value of the condensation water which is a combustion product, thermal expansion coefficient of the material to be selected, galvanic corrosion risk of the material to be selected, formability of the material in accordance with the design. When the said factors are taken into consideration, the combustion chamber (1) is a product which may be produced from aluminum material by aluminum injection technology. The type of aluminum material used is determined as Etial 141 type aluminum material, upon consideration of the technical specifications contributed to the material by the alloy ratios within aluminum. [34] Within the framework of the basic principles described herein, development of various embodiments of the invention is possible. The inventive combustion chamber (1) cannot be limited with the examples provided above to facilitate understanding of the subject. The invention is essentially according to the claims.

Claims

Claims
[1] A combustion chamber (1) comprising an inlet (4) which is located at the top of the section where the combustion gas movement is directed and into which the combustion gas is received, an exchanger (6) inside of which domestic water and outside of which combustion gas whose speed is reduced by the divergent (2) wall structure circulates, characterized in that it comprises the parts of a burner (5) which is located in the inlet (4) part, in which the air-gas mixture is burned and which is disposed at the top part of the chamber (1), a wide cross-sectional divergent nozzle (2) wall structure applied at the outlet of the burner (5), a narrow cross-sectional convergent nozzle (3) wall structure applied at the outlet of the exchanger (6) to facilitate discharge of the combustion gas, a gas outlet (8) at the lowermost part of the chamber (1) where the combustion gas is discharged and a water outlet (7) through which the condensed water vapor within the combustion gas which transfers its heat in the exchanger (6) is discharged as a fluid.
PCT/IB2007/055184 2006-12-22 2007-12-17 A combustion chamber WO2008078279A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2006/07361 2006-12-22
TR200607361 2006-12-22

Publications (2)

Publication Number Publication Date
WO2008078279A2 true WO2008078279A2 (en) 2008-07-03
WO2008078279A3 WO2008078279A3 (en) 2008-08-21

Family

ID=39433947

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/055184 WO2008078279A2 (en) 2006-12-22 2007-12-17 A combustion chamber

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Country Link
WO (1) WO2008078279A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009053247A1 (en) * 2007-10-25 2009-04-30 Bekaert Combust. Technol. B.V. Heat exchanger element with a combustion chamber for a low co and nox emission combustor
JP2011225537A (en) * 2010-03-31 2011-11-10 Daiichi Sankyo Co Ltd Production method for solid preparation
CN105465821A (en) * 2015-12-25 2016-04-06 力聚热力设备科技有限公司 Cooling flame frontal surface device capable of inhibiting generation of NOx in hearth of gas-fired boiler
CN106642116A (en) * 2016-12-09 2017-05-10 岳阳钟鼎热工电磁科技有限公司 Ultralow NOx emission blue flame round gas burner

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066044A (en) * 1983-09-21 1985-04-16 Hitachi Ltd Instantaneous water heater
EP0373027A1 (en) * 1988-12-02 1990-06-13 GEMINOX, Société Anonyme Condensing boiler for heating with a heat-conveying liquid
AT394769B (en) * 1990-11-26 1992-06-25 Vaillant Gmbh Heating appliance with burner
EP0498748A1 (en) * 1991-02-07 1992-08-12 De Dietrich Thermique Cast iron gas-fixed sectional boiler with total premixing
DE9317480U1 (en) * 1992-11-16 1993-12-23 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Heating device
AT396831B (en) * 1990-12-10 1993-12-27 Vaillant Gmbh Safety device for a heating appliance
DE19508692A1 (en) * 1994-03-03 1995-09-07 Vaillant Joh Gmbh & Co Burner with solid body filler material
US5476088A (en) * 1994-08-15 1995-12-19 Teledyne Industries, Inc. Flue product exhaust and condensate collecting systems

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6066044A (en) * 1983-09-21 1985-04-16 Hitachi Ltd Instantaneous water heater
EP0373027A1 (en) * 1988-12-02 1990-06-13 GEMINOX, Société Anonyme Condensing boiler for heating with a heat-conveying liquid
AT394769B (en) * 1990-11-26 1992-06-25 Vaillant Gmbh Heating appliance with burner
AT396831B (en) * 1990-12-10 1993-12-27 Vaillant Gmbh Safety device for a heating appliance
EP0498748A1 (en) * 1991-02-07 1992-08-12 De Dietrich Thermique Cast iron gas-fixed sectional boiler with total premixing
DE9317480U1 (en) * 1992-11-16 1993-12-23 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Heating device
DE19508692A1 (en) * 1994-03-03 1995-09-07 Vaillant Joh Gmbh & Co Burner with solid body filler material
US5476088A (en) * 1994-08-15 1995-12-19 Teledyne Industries, Inc. Flue product exhaust and condensate collecting systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009053247A1 (en) * 2007-10-25 2009-04-30 Bekaert Combust. Technol. B.V. Heat exchanger element with a combustion chamber for a low co and nox emission combustor
US8726851B2 (en) 2007-10-25 2014-05-20 Bekaert Combustion Technology B.V. Heat exchanger element with a combustion chamber for a low CO and NOx emission combustor
KR101503960B1 (en) * 2007-10-25 2015-03-18 베카에르트 컴버스천 테크놀러지 비.브이. Heat exchanger element with a combustion chamber for a low co and nox emission combustor
JP2011225537A (en) * 2010-03-31 2011-11-10 Daiichi Sankyo Co Ltd Production method for solid preparation
CN105465821A (en) * 2015-12-25 2016-04-06 力聚热力设备科技有限公司 Cooling flame frontal surface device capable of inhibiting generation of NOx in hearth of gas-fired boiler
CN106642116A (en) * 2016-12-09 2017-05-10 岳阳钟鼎热工电磁科技有限公司 Ultralow NOx emission blue flame round gas burner

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