WO2016108059A1 - Sistema de combustión en lecho poroso y combustión turbulenta - Google Patents
Sistema de combustión en lecho poroso y combustión turbulenta Download PDFInfo
- Publication number
- WO2016108059A1 WO2016108059A1 PCT/IB2014/002902 IB2014002902W WO2016108059A1 WO 2016108059 A1 WO2016108059 A1 WO 2016108059A1 IB 2014002902 W IB2014002902 W IB 2014002902W WO 2016108059 A1 WO2016108059 A1 WO 2016108059A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion
- porous
- bed
- porous bed
- fuel
- Prior art date
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Classifications
-
- 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
- F23D14/12—Radiant burners
-
- 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
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
Definitions
- the present invention relates to a combustion system of exchangeable gases in a porous bed for cooking applications and those where radiation heat transfer is feasible.
- the system has a control system that allows energy savings through the interruption of the gas supply depending on the temperature of the porous bed.
- the technology of the porous burners has its beginnings in the 70s when Weinberg (1971) 2 raised the concept of combustion with excess enthalpy, which refers to the combustion process where there is a preheating of the air-fuel mixture upstream of the reaction zone due to the effect of radiation and conduction of a solid medium.
- porous bed burners have been developed in industrial-type operations, such as internal combustion engines, gas turbines, heat exchangers, oil and gas recovery, lighting, hydrogen production, thermoelectric generation , synthesis of HCI, oxidation of volatile organic compounds, combustion of liquid fuels, tubes radiants, glass fusion, metal fusion, among others (Mujeebu, Abdullah, Bakar, Mohamad, & Abdullah, 2009; Trimis & Durst, 1996) 3 .
- porous matrix burners are known in the prior art that do not necessarily operate with the combustion principle with excess enthalpy and the ceramic or metallic porous material is used more as a flame stabilization mechanism and increased radiation
- This type of burner is disclosed in the documents:
- rotary systems for barbecue are known in the state of the art; combustion systems based on porous ceramic or metal fiber matrices composed of two layers; turbulent combustion systems incorporating a porous ceramic cone responsible for recovering residual heat from gases from the combustion chamber for preheating the air / fuel premix; burners in which the air inlets are tangential to the main mixing tube and generate turbulent combustion; systems composed of a perforated ceramic plate made of alumina, silica, iron, calcium oxide, magnesium oxide, feldspar, sodium potassium oxide, titanium oxide and other auxiliary materials, where combustion in this system develops in the perforations of the plate and above them; burner composed of an air and gas distribution system; porous bed burner in which they incorporate an ignition device upstream of the bed; porous bed burner constructed from corrugated sheets of siliconized carbon; burner that includes an ignition device inside the bed and allows the incorporation of an air flow control system, liquid fuel and gaseous fuel that guarantees an optimum equivalence ratio during operation; porous burners made of alumina and perforated silic
- a burner that has no moving parts and in which, combustion is not on the surface but inside a porous ceramic bed and can work with conventional combustible gases such as natural gas and LPG, and unconventional gases such as biogas, synthesis gas and coke gas.
- a burner in which the porous matrix where combustion develops has a random distribution of pores and has a bed of ceramic amorphous particles for the preheating zone.
- a burner that although includes an air inlet pipe in the system also has tangential inlets to improve the uniformity of the premix that enters the porous matrix, where said inlets have angles of inclination with respect to the vertical that favor mixing ascending and help to overcome the pressure drop of the bed.
- a burner that has a preheating zone composed of non-spherical ceramic particles in contact with a ceramic foam, with regular pore structure but randomly distributed, thereby achieving greater area for the combustion reaction distribution.
- the flame retardant barrier zone is composed of non-spherical ceramic particles from waste in industrial milling operations, which in turn act as a preheating zone for the air / fuel premix upstream of the main zone of combustion and in which, interchangeability between conventional and renewable fuels other than hydrogen and most frequently used industrially is allowed;
- the present invention refers to a combustion system of exchangeable gases in a porous bed for cooking applications and other applications where the use of radiation heat transfer is feasible. Due to the superadiabatic combustion mechanism of this system, it is possible to use conventional fuels such as natural gas and liquefied petroleum gas, as well as low calorific fuels such as biogas, synthesis gas and coke gas. At the same time, combustion in this system can occur with poor premixes with equivalence ratios between 0.30 and 0.92.
- the porous bed of the combustion system employs ceramic particles from industrial grinding process residues with spherical and non-spherical geometry composed of A 0 3 , ZrCb or SiC, which are combined with ceramic foams and at which the zone of stabilization is stabilized combustion.
- This configuration is complemented by a turbulent independent combustion system for convection heating in the initial stage of preheating the porous bed.
- the equipment has a control system that allows energy savings through the interruption of the gas supply depending on the temperature of the porous bed, taking advantage of its heat storage capacity. Because the heat flow to the load is maintained despite interrupting the fuel supply, the efficiency of the system is not affected.
- the porous bed of the combustion system of the present invention is composed of two zones: a preheating zone formed by ceramic particles of spherical and / or non-spherical geometry from industrial milling process residues, composed of Al 2 0 3 , Zr0 2 , SiC or a combination of these.
- a preheating zone formed by ceramic particles of spherical and / or non-spherical geometry from industrial milling process residues, composed of Al 2 0 3 , Zr0 2 , SiC or a combination of these.
- the other zone is formed by a ceramic foam with porosity between 10 and 30 dpi (pores per inch) and composed of Al 2 0 3 , Zr0 2 , SiC, SiSiC or a combination of them.
- the irregular shape of the particles of the preheating bed allows the interface between this zone and the combustion zone of the ceramic foam to be more uniform, which favors the transfer of heat by conduction to the preheating zone.
- a special feature of the combustion system described is that it allows the subdivision of the porous bed into smaller areas, thereby increasing the radiant heat flow per unit area.
- the porous bed is complemented with a turbulent independent combustion system for convection heating, which is automatically interrupted when the porous bed combustion enters into operation.
- the device formed by the preheating zone with ceramic particles, the combustion zone with ceramic foam and the turbulent complementary combustion system has a control system whose main function is energy saving by interrupting the supply of gas for certain periods of time depending on the temperature of the porous bed, taking advantage of its heat storage capacity.
- the control system maintains the air / fuel ratio within the stability ranges with equivalence ratios between 0.3 and 0.92, and also starts the ignition and duration of the preheating period of the porous bed to the nest. of the operation and operating time of the turbulent combustion system.
- the equipment object of the present patent application is schematized in Figure 1.
- the porous bed of the burner consists of a ceramic foam (1) of SiSiC and a layer of alumina pieces (2) from the milling operation in mills of balls. These pieces are supported on a perforated mesh (3) metal or ceramic. These materials are contained in a ceramic or metal housing (5) and surrounded by insulating material (4) to prevent heat loss.
- a metal tube (6) is attached to the housing to which the fuel enters through the nozzle (8) and the air coming from the mechanical ventilation system (18) through the ducts (7), which are tangential to the tube (6).
- a turbulent burner (9) whose premix enters through the Venturi (10). The function of this burner is to start heating the walls of the load (21) at the beginning of the operation where the alumina bed (2) is cold and must be heated by the premix that enters the tube (6). This premix is ignited by the spark plug (20).
- the device is equipped with a control system with a central PLC (14) that receives the fuel flow signals from the orifice plates (11) and (13) and the air flow from the orifice plate (12). According to the fuel flow entering the burner through the tube (6), the PLC (14) adjusts the pre-mix air flow by acting on the speed variator (17) that controls the revolutions of the mechanical ventilation system. This ensures that the burner is operating at all times with an adequate air / fuel ratio.
- the PLC (14) allows the passage of fuel through the proportional valves (15) and (16).
- the PLC (14) closes the fuel passage through the proportional valve (16) of the turbulent burner (9) and adjusts the fuel flow of the porous bed burner with the proportional valve (15) and the air flow with the speed variator (17).
- the thermocouple (22) indicates the temperature close to the reaction zone.
- the PLC sends signals to the proportional valve (15) to cut off the fuel supply and will reopen when the thermocouple (22) indicates that the temperature has decreased to a value from which combustion could destabilize .
- the burner can operate with fuel closing cycles without affecting the heat transfer to the load (21) due to the heat stored in the ceramic foam (1) and the alumina bed (2), which is not possible to do with conventional free flame combustion systems.
- Figure 1 corresponds to a diagram of the cross section of the porous bed combustion system complemented with the turbulent combustion system, as well as a diagram of the control system that is coupled with the combustion system
- Figure 2 corresponds to a top view of the porous bed combustion system complemented with the turbulent type combustion system.
- Figure 3 is a top view of a combustion system using the same principle of operation described in the present invention in which the area of the main combustion zone for greater concentration of radiant heat per unit area.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112017014146-9A BR112017014146B1 (pt) | 2014-12-30 | 2014-12-30 | Sistema de combustão em leito poroso e de combustão turbulenta |
PCT/IB2014/002902 WO2016108059A1 (es) | 2014-12-30 | 2014-12-30 | Sistema de combustión en lecho poroso y combustión turbulenta |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2014/002902 WO2016108059A1 (es) | 2014-12-30 | 2014-12-30 | Sistema de combustión en lecho poroso y combustión turbulenta |
Publications (1)
Publication Number | Publication Date |
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WO2016108059A1 true WO2016108059A1 (es) | 2016-07-07 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2014/002902 WO2016108059A1 (es) | 2014-12-30 | 2014-12-30 | Sistema de combustión en lecho poroso y combustión turbulenta |
Country Status (2)
Country | Link |
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BR (1) | BR112017014146B1 (es) |
WO (1) | WO2016108059A1 (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019163488A1 (ja) * | 2018-02-21 | 2019-08-29 | 川崎重工業株式会社 | バーナ装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57164214A (en) * | 1981-04-01 | 1982-10-08 | Mitsubishi Electric Corp | Full primary type combustion device |
US4977111A (en) * | 1989-08-04 | 1990-12-11 | Arizona Board Of Regents | Porous radiant burners having increased radiant output |
US5511974A (en) * | 1994-10-21 | 1996-04-30 | Burnham Properties Corporation | Ceramic foam low emissions burner for natural gas-fired residential appliances |
EP1308675A1 (en) * | 2001-11-05 | 2003-05-07 | Rinnai Kabushiki Kaisha | Gas heater |
WO2005073630A1 (en) * | 2004-02-02 | 2005-08-11 | Aktiebolaget Electrolux | Gas burner |
CN101556040A (zh) * | 2009-05-15 | 2009-10-14 | 大连理工大学 | 一种燃用液体燃料的多孔介质燃烧装置 |
-
2014
- 2014-12-30 BR BR112017014146-9A patent/BR112017014146B1/pt active IP Right Grant
- 2014-12-30 WO PCT/IB2014/002902 patent/WO2016108059A1/es active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57164214A (en) * | 1981-04-01 | 1982-10-08 | Mitsubishi Electric Corp | Full primary type combustion device |
US4977111A (en) * | 1989-08-04 | 1990-12-11 | Arizona Board Of Regents | Porous radiant burners having increased radiant output |
US5511974A (en) * | 1994-10-21 | 1996-04-30 | Burnham Properties Corporation | Ceramic foam low emissions burner for natural gas-fired residential appliances |
EP1308675A1 (en) * | 2001-11-05 | 2003-05-07 | Rinnai Kabushiki Kaisha | Gas heater |
WO2005073630A1 (en) * | 2004-02-02 | 2005-08-11 | Aktiebolaget Electrolux | Gas burner |
CN101556040A (zh) * | 2009-05-15 | 2009-10-14 | 大连理工大学 | 一种燃用液体燃料的多孔介质燃烧装置 |
Non-Patent Citations (4)
Title |
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MUTHUKUMAR P ET AL.: "Development of novel porous radiant burners for LPG cooking applications.", FUEL IPC SCIENCE AND TECHNOLOGY PRESS, vol. 112, pages 562 - 566, XP028672312, ISSN: 0016-2361, DOI: doi:10.1016/j.fuel.2011.09.006 * |
PANTANGI V K ET AL.: "Studies on porous radiant burners for LPG (liquefied petroleum gas) cooking applications.", ENERGY, vol. 36, no. 10, OXFORD, GB, pages 6074 - 6080, XP028306347, ISSN: 0360-5442, DOI: doi:10.1016/j.energy.2011.08.008 * |
VANDADI VAHID ET AL.: "Superadiabatic radiant porous burner with preheater and radiation corridors.", INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, vol. 64, pages 680 - 688, XP028673418, ISSN: 0017-9310, DOI: doi:10.1016/j.ijheatmasstransfer.2013.04.054 * |
WANG HONGMIN ET AL.: "Experimental study on temperature variation in a porous inert media burner for premixed methane air combustion.", ENERGY, vol. 72, OXFORD, GB, pages 195 - 200, XP028879466, ISSN: 0360-5442, DOI: doi:10.1016/j.energy.2014.05.024 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019163488A1 (ja) * | 2018-02-21 | 2019-08-29 | 川崎重工業株式会社 | バーナ装置 |
JP2019143895A (ja) * | 2018-02-21 | 2019-08-29 | 川崎重工業株式会社 | バーナ装置 |
Also Published As
Publication number | Publication date |
---|---|
BR112017014146A2 (pt) | 2018-03-06 |
BR112017014146B1 (pt) | 2021-12-21 |
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