CN108443884A - A kind of diffusion type porous medium burner - Google Patents
A kind of diffusion type porous medium burner Download PDFInfo
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- CN108443884A CN108443884A CN201810466678.7A CN201810466678A CN108443884A CN 108443884 A CN108443884 A CN 108443884A CN 201810466678 A CN201810466678 A CN 201810466678A CN 108443884 A CN108443884 A CN 108443884A
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- 229910000831 Steel Inorganic materials 0.000 claims description 26
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- 239000003034 coal gas Substances 0.000 claims description 16
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- 239000011148 porous material Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 2
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- 229910001928 zirconium oxide Inorganic materials 0.000 claims 1
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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
- F23D14/14—Radiant burners using screens or perforated plates
-
- 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
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/725—Protection against flame failure by using flame detection devices
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The present invention provides a kind of diffusion type porous medium burners, are related to multi-hole medium combustion technical field.The burner includes burner body, thermocouple, sparking electrode, detecting electrode；Ontology includes shell, inner casing, inlet channel, and inner casing is inserted into the first cavity of shell；Inner casing has to be connected to and the second coaxial cavity with the first cavity；The axis direction of second cavity is disposed with air distribution plate, gas allocation disk；It is disposed with the first macrocellular foam ceramic wafer, aperture foamed ceramic panel and the second macropore foamed ceramic panel in first cavity and in gas allocation side surface downstream area；Inlet channel includes gas inlet, air intlet, air pipeline and gas piping, and gas inlet is connected to through the gas piping across air distribution plate with gas allocation disk, and air intlet is connected to by air pipeline with air distribution plate.The burner facilitates flame monitoring, predicts and diagnose the functions such as the service condition of porous media material with that can be effectively prevented tempering.
Description
Technical field
The present invention relates to multi-hole medium combustion technical fields, in particular to a kind of diffusion type porous medium burner.
Background technology
In China's energy resource structure, the clean energy resourcies accounting such as natural gas, water power, nuclear power is fairly small, average well below the world
Level, in China, development has larger space to the clean energy resourcies such as natural gas.The low-BTU gas such as blast furnace gas, coal mine mash gas can
Fire that ingredient is few, calorific value is low, under traditional free flame burning condition, it is difficult to light control, burning is extremely difficult, be easy tempering and
It puts out, usually tail gas is taken as to be directly discharged into air.This not only causes energy waste, but also causes greenhouse because containing methane
Effect.So improving and developing combustion technology, realize that the high-efficiency cleaning of conventional energy resource utilizes the recycling with low-BTU gas
It is particularly important.
Traditional combustion is the flaming combustion characterized by free flame, and efficiency of combustion is low, temperature distributing disproportionation, pollutant row
Put the shortcomings of high.Multi-hole medium combustion is a kind of combustion technology of novel clean.Porous media serves not only as a kind of heat disturbance
Medium, while being also a kind of burn as gas supporting body.Main function has following three points：Enhance its radiation effects simultaneously
The heat near flame front can be transmitted to both ends in time so that the Temperature Distribution near flame front is more uniform；Gas is more
Effect is dissipated, the heat and mass effect of gas burning is enhanced；The stability that gas burns is set to greatly enhance.
Foamed ceramics is as a kind of special porous media, and density is small, intensity is big, permeability is good, heat-resisting, wear-resistant
With it is corrosion-resistant, thermal conductivity ratio metal material is small, but with gas phase than much bigger, thermal capacity and the big number of thermal radiation capability ratio gas
Thousand times, be the combustion field better than free space, the combustion chamber made with this kind of material can meet insulation requirements and have
Good heat transfer effect, can realize low-BTU gas stablizes burning.
Multi-hole medium combustion can provide long wave, medium wave, shortwave radiation, be adapted to a variety of different heating states, can be with
It substitutes normal burner and is widely used in the heating of commercial and living space, chemical industry and intermetallic composite coating, glass annealing, coating and paint
The fields such as burning disposal of drying, food processing, paper pulp and papermaking dry, volatile organic compounds.
However, due to various limitations, multi-hole medium combustion technology there are no being used widely, is limited in the industrial production
It in low-temperature heat field, and focuses mostly in experimental study towards the research of the porous media combustor of high temperature heating art, does not have also
Have and realizes extensive commercial Application.High temperature heating art is industrial key, is energy consumption and pollutant emission
Therefore the most important thing is badly in need of porous media combustor of the exploitation suitable for high temperature heating art.In addition, current porous Jie
Matter burner all uses the form of premixed combustion substantially, since the combustion reaction of porous media combustor is in entire panel section
Upper progress, correspondingly, it is circulation that combustion medium (air and combustion gas), which is also with entire porous media section before entering combustion zone,
Area flow so that flow velocity is relatively low (being less than 1m/s) before combustion medium enters combustion zone, and so small speed is fired using premix
Burning will be easy to generate tempering, cause safety accident.Diffusion type burning is independent before entering combustion zone due to combustion medium
Flowing, the generation of tempering is avoided, therefore, is combined, can keep more with multi-hole medium combustion if burning diffusion type
The advantages of hole agent burns, and the advantages of diffusion type burning is not easy to be tempered can be played.
Porous media combustor is generally pre-mixing type combustion apapratus, and premixed porous media combustor common at present is applied more
In low-temperature heat field (temperature is less than 400 DEG C), since flame temperature is relatively low, basic combustion system is fairly simple, basic to think
Road is after air and coal gas are mixed in premixer, to enter burning porous medium internal combustion.However, with multi-hole medium combustion technology to
High temperature heating art is promoted, and this simple structure arrangement is just no longer applicable in, and specific defect is shown as：
(1) there is tempering risk in premixed combustion
Generally for the premixed porous media combustor in low-temperature heat field, air and combustion gas are laggard in premixer's mixing
Enter porous media preheated burning, porous media is in lower temperature environment and backheat is limited, even if combustion conditions appearance is very big
Fluctuation, be also possible to prevent to be tempered.However, when porous media combustor is applied to high temperature heating art, with flame temperature
Spending elevating medium coefficient of radiosity will be increased with the three cubed multiple of temperature, backheat enhancing.When in long-term work or combustion
When burning operating mode mutation, in fact it could happen that porous media material pore structure is because of thermal stress damage, especially aperture porous media hole
It is more fragile, there is being back to the case where heat of unburned premixed gas is uprushed, when such case is persistently aggravated, just will appear electricity
Pole is able to detect that still there is a phenomenon where be tempered for burner for flare up fire.Therefore, premixed porous media combustor can not be kept away
The presence tempering risk exempted from, there is no tempering risks for diffusion type burning, and it is one that diffusion type, which is burnt for multi-hole medium combustion,
Good thinking.
(2) electrode detection combustion flame signal has hysteresis quality
When porous media combustor using low-BTU gas (such as blast furnace gas) be used as fuel when, due to fuel value compared with
It is low, it burns initial stage, the flame temperature formed inside porous media is low, can not be arrived by electrode detection, with the progress of burning, relies on
Porous media heat is heated at reflux unburned premixed gas, when premixed gas is heated to certain temperature, could be detected in porous media
To flare up fire.Therefore, when porous media combustor uses low-BTU gas as fuel, the flare up fire that electrode detection arrives has
There is hysteresis quality, and lag time is different with the difference of porous media material and gas families, existing porous media combustor is deposited
In this shortcoming.
(3) porous media material service condition can not be predicted or diagnosed according to real-time service condition
The flame of porous media combustor is present in inside porous media, when used for a long time, can inevitably encounter material
The case where aging, pore structure damage, when small structure damages, part flame appears in small porose area, and flame appears in small
Porose area further exacerbates the destruction of small porose area, when material damage to a certain extent, small porose area just lose prevent tempering
Barrier action, occur burner backfire, be applied to high temperature heating art when such case more very.Therefore, it is needed during use
The damaged condition for monitoring aperture porous media material needs to replace in time when damage develops to a certain extent, in order to avoid generate
Safety accident.But existing porous media combustor cannot be satisfied this diagnosis requirement from structure.
(4) when burner air gas are preheated, real-time working condition can not be monitored
Either conventional open flame burner or porous media combustor, current premix burner to empty, coal gas not
Preheated, this be in order to prevent tempering occur, however theoretically for, by fume afterheat for preheat space gas be energy return
The best mode of receipts.When air or gas-preheating, the control of preheating temperature is extremely important, for premixed combustion, due to pre-
Mixed gas is also heated by porous media reflux heat in preheating zone, is equivalent to the energy that premixed gas both receives preheating heating
The energy that porous media is heated at reflux is received again, and this two parts energy is to be mutually related, pre- thermal energy increases porous media
The increase of the heat of reflux, the heat that flows back can increase pre-heat effect again, once the superposition of these heats makes gas temperature pre-
Mixed interior reaches a certain numerical value, or even causes back draft, safety accident occurs.For diffusion combustion, outlet diffusor with
Porous media interface can have gap, and the energy that preheating is heated and the energy that porous media is heated at reflux are similarly subjected at gap
Superposition, once temperature reaches ignition temperature combustion reaction will occur at this, by damage spreading exit structure, duration
Confined space detonation can occur too long and generate safety accident.In real process, gas preheating generally uses heat exchanger, and heat
Amount source is burning waste gas, and the current design level of heat exchanger is generally unable to reach accurate temperature controlling, and also have can for burning waste gas
It can fluctuate at any time, these factors all will cause the gas after heat exchanger preheating to be unable to reach or more than design temperature, appearance safety
Accident.Therefore, either premixed combustion or diffusion combustion needs unavoidably to generate gas warm-up operations in real process
Mutation situation be monitored.
In conclusion porous media combustor needs are perfect at present, especially porous media combustor is applied to high temperature
When heating art, a set of more perfect equipment is needed.
Invention content
The purpose of the present invention is to provide a kind of diffusion type porous medium burner, it can be achieved that the efficient and cleaning combustion of fuel
It burns, and adapts to the gas burning of different calorific values, while having and can be effectively prevented tempering, facilitate flame monitoring, predict and examine
The service condition of disconnected porous media material preheats the functions such as effective monitoring combustion conditions in air gas.
The invention is realized in this way：
A kind of diffusion type porous medium burner, including：
Burner body, burner body include burner housing, burner inner casing and inlet channel, burner inner casing
It is inserted into the first cavity of burner housing, and is close to the side wall of burner housing；Burner inner casing has to be connected with the first cavity
Logical and coaxial arrangement the second cavity；Burner inner casing has the air distribution plate and coal that the axis direction along the second cavity is arranged
Gas distribution plate；And in the first cavity, the downstream area of gas allocation side surface be disposed with the first macrocellular foam ceramic wafer,
Aperture foamed ceramic panel and the second macropore foamed ceramic panel；Inlet channel is set to burner inner casing, and include gas inlet,
Air intlet, air pipeline and the gas piping being set in air pipeline being connected to gas inlet, gas inlet wear long
The gas piping for crossing air distribution plate is connected to gas allocation disk, and air intlet is connected to by air pipeline with air distribution plate；
Thermocouple is set to burner inner casing, and one end of thermocouple is stretched into the second cavity, enters first for detecting
The gas temperature of macrocellular foam ceramic wafer；
Sparking electrode, one end of the second macropore foamed ceramic panel is disposed in proximity to by the inclination trepanning of burner housing,
And for the air gas of the end face of macrocellular foam ceramic wafer to be lighted；
Detecting electrode is inserted into the outlet end of the second macropore foamed ceramic panel by the horizontal bore of burner housing, and
Ionization subsignal for detecting flame.
Further, in the preferred embodiment, burner housing includes the first steel plate and is set to first
First high-strength light castable of steel plate.
Further, in the preferred embodiment, burner inner casing includes the second steel plate and is set to second
Second high-strength light castable of steel plate.
Further, in the preferred embodiment, air distribution plate is the third steel plate with through-hole, gas pipe
Road may pass through through-hole and is connected to gas allocation disk, and third steel plate is fixedly arranged on burner inner casing by holder.
Further, in the preferred embodiment, the quantity of holder is 4, and every holder runs through entire combustion
Second high-strength light castable of burner inner casing, and one end is connect with the second steel plate, the other end is fixedly connected with air distribution plate.
Further, in the preferred embodiment, gas allocation disk includes distribution disc main body and circumference array
It is set to the distribution branch of distribution disc main body, is formed between adjacent distribution branch for the channel for air-transport, and every is divided
It is arranged at intervals with multiple gas outlets with branch road.
Further, in the preferred embodiment, the quantity for distributing branch is ten, and is being gradually distance from distribution
On the direction of disc main body, the radial diameter of the gas outlet of every distribution branch road gradually increases.
Further, in the preferred embodiment, aperture foamed ceramic panel, the first macrocellular foam ceramic wafer,
The hole equivalent diameter of two macrocellular foam ceramic wafers is between 0.4~5mm, and porosity is between 0.6~0.9, and number of pores is 10
In the range of~60PPI, and the hole of the first macrocellular foam ceramic wafer and the second macropore foamed ceramic panel is made pottery more than aperture foam
The hole of porcelain plate.
Further, in the preferred embodiment, aperture foamed ceramic panel, the first macrocellular foam ceramic wafer,
The porous media that two macrocellular foam ceramic wafers are square, space structure is netted, and material is aluminium oxide, silicon carbide or oxygen
Change zirconium.
Further, in the preferred embodiment, diffusion type porous medium burner further includes being connected to air
The ventilation duct of import and the steam line for being connected to gas inlet.
The advantageous effect of said program：
The present invention provides a kind of diffusion type porous medium burner, including burner body, thermocouple, sparking electrode with
And detecting electrode.Wherein, burner body includes burner housing, burner inner casing and inlet channel, and burner inner casing is inserted
Enter in the first cavity of burner housing, and is close to the side wall of burner housing；
Burner inner casing has the second cavity for being connected to and being coaxially disposed with the first cavity；Burner inner casing has along second
Air distribution plate, the gas allocation disk of the axis direction setting of cavity；Under first cavity inside is since the gas allocation side surface
Trip region sets gradually the first macrocellular foam ceramic wafer, aperture foamed ceramic panel and the second macropore foamed ceramics in the axial direction
Plate；Inlet channel is set to burner inner casing, and include gas inlet, air intlet, air pipeline and with gas inlet connect
The logical gas piping being set in air pipeline, gas inlet pass through the gas piping and gas allocation disk across air distribution plate
Connection, air intlet are connected to by air pipeline with air distribution plate.
Air is spread around by air distribution plate guide functions, then equal by channel between each branch of gas allocation disk
It is even to enter in the foamed ceramic panel of upstream.Meanwhile coal gas, through gas allocation disk even distributing wind, redisperse enters foamed ceramic panel
It is interior.It is respectively the first macrocellular foam ceramic wafer, aperture foamed ceramic panel and the second macropore from gas allocation side surface downstream part
Foamed ceramic panel.Respectively the first air gas mix preheating zone, the second air gas mixing preheating zone, combustion zone.In first and
In two mixing preheating zones, since foamed ceramics enhances the dispersion of gas, coal gas, air are done acutely in foamed ceramic panel
Disturbance, and constantly blend.Meanwhile the region foamed ceramics is increased by downstream Heat Conduction in Porous Media and heat radiation heating temperature,
Gaseous mixture carries out convection current and radiation heat transfer with porous body, and mixture temperature is made to increase.Gaseous mixture after preheating is steeped in the second macropore
(combustion zone) burns in foam ceramics, more hot after and to mix preheating block transitive due to preheating so that ignition temperature increases
Amount.Second mixing preheating zone is aperture foamed ceramics, tempering is effectively prevent to flame quenching effect using aperture, at present
Trip burning heat production passes to mixing preheating zone by porous media high-termal conductivity and thermal emissivity rate, is efficiently preheated to incoming mixture.
As combustion chamber is stablized, combustion flame is submerged combustion for downstream combustion zone, and combustion can efficiently be utilized by being heated by heat radiation mode
It heats.
Secondly, thermocouple is set to burner inner casing, and one end of thermocouple is stretched into the second cavity, is surveyed using thermocouple
Data monitoring and diagnose porous media material service condition, predict porous media material service life.Meanwhile utilizing thermoelectricity
The data occasionally measured preheat effective monitoring combustion conditions in air gas, feed back and adjust in pre-heating device and heating space
Operating parameter.
Also, sparking electrode is disposed in proximity to the one of the second macropore foamed ceramic panel by the inclination trepanning of burner housing
End, and for lighting the air gas of the end face of macrocellular foam ceramic wafer；The horizontal bore that detecting electrode passes through burner housing
It is inserted into the outlet end of the second macropore foamed ceramic panel, and the ionization subsignal for detecting flame.Pass through detecting electrode and heat
Galvanic couple synergistic effect real time monitoring flare up fire, can effectively judge whether combustion gas is ignited and ensures to stablize burning.
In conclusion diffusion type porous medium burner provided by the invention is, it can be achieved that fuel efficient and cleaning burning,
And the gas burning of different calorific values is adapted to, while having and can be effectively prevented tempering, facilitates flame monitoring, predicts and diagnose more
The service condition of hole dielectric material preheats the functions such as effective monitoring combustion conditions in air gas.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the diffusion type porous medium burner that the embodiment of the present invention provides；
Fig. 2 is the structural schematic diagram for the burner housing that the embodiment of the present invention provides；
Fig. 3 is the structural schematic diagram for the burner inner casing that the embodiment of the present invention provides；
Fig. 4 is the structural schematic diagram for the coal gas dispersion impeller that the embodiment of the present invention provides.
Icon：100- diffusion type porous medium burners；101- burner bodies；103- burner housings；105- burns
Device inner casing；111- gas allocation disks；113- the first macrocellular foam ceramic wafers；115- aperture foamed ceramic panels；The second macropores of 117-
Foamed ceramic panel；119- air distribution plates；121- gas inlets；123- air intlets；125- air pipelines；127- gas pipes
Road；129- thermocouples；131- sparking electrodes；133- detecting electrodes；The first steel plates of 135-；137- the first high-strength light castables；
The second steel plates of 139-；141- the second high-strength light castables；143- through-holes；145- third steel plates；147- holders；149- distribution plates
Main body；151- distributes branch；The gas outlets 153-.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the present invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the embodiment of the present invention, it should be noted that term "center", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
Either the invention product using when the orientation or positional relationship usually put, be merely for convenience of the description present invention and simplification retouched
It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and
It should not be understood as indicating or implying relative importance.
In the description of the embodiment of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term
" setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, and can also be detachably to connect for example, it may be being fixedly connected
It connects, or is integrally connected；It can be mechanical connection, can also be electrical connection；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be on or below second feature
Be in direct contact including the first and second features, can also include the first and second features not be in direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature second spy
Right over sign and oblique upper, or be merely representative of fisrt feature level height and be higher than second feature.Fisrt feature second feature it
Under, lower section and fisrt feature included below are immediately below second feature and obliquely downward, or be merely representative of fisrt feature level height
Less than second feature.
Fig. 1 is the structural schematic diagram of diffusion type porous medium burner 100 provided in this embodiment.Referring to Fig. 1, this reality
It applies example and provides a kind of diffusion type porous medium burner 100, including：Burner body 101, thermocouple 129, sparking electrode
131 and detecting electrode 133.
Wherein, referring to Fig. 1, in the present embodiment, burner body 101 includes burner housing 103, burner
Inner casing 105 and inlet channel, burner inner casing 105 is inserted into the first cavity of burner housing 103, and is close to outside burner
The side wall of shell 103；Burner inner casing 105 has the second cavity for being connected to and being coaxially disposed with the first cavity；Burner inner casing 105
Air distribution plate 119 and gas allocation disk 111 with the axis direction setting along the second cavity；And in the first cavity, coal
The downstream area of 111 end face of gas distribution plate be disposed with the first macrocellular foam ceramic wafer 113, aperture foamed ceramic panel 115 with
And the second macropore foamed ceramic panel 117；Inlet channel is set to burner inner casing 105, and include gas inlet 121, air into
Mouth 123, air pipeline 125 and the gas piping 127 being set in air pipeline 125 being connected to gas inlet 121, coal gas
Import 121 is connected to through the gas piping 127 across air distribution plate 119 with gas allocation disk 111, and air intlet 123 passes through sky
Feed channel 125 is connected to air distribution plate 119.
Air is spread around by 119 guide functions of air distribution plate, then by between 111 each branch of gas allocation disk
Channel is even into the foamed ceramic panel of upstream.Meanwhile coal gas, through 111 even distributing wind of gas allocation disk, redisperse enters bubble
In foam ceramic wafer.It is respectively the first macrocellular foam ceramic wafer 113, aperture foam pottery from 111 end face downstream part of gas allocation disk
Porcelain plate 115 and the second macropore foamed ceramic panel 117.Respectively the first air gas mix preheating zone, the mixing preheating of the second air gas
Area, combustion zone.In the first and second mixing preheating zones, since foamed ceramics enhances the dispersion of gas, coal gas, air
Violent disturbance is done in foamed ceramic panel, and is constantly blended.Meanwhile the region foamed ceramics by downstream Heat Conduction in Porous Media and
Heat radiation heating temperature increases, and gaseous mixture carries out convection current and radiation heat transfer with porous body, and mixture temperature is made to increase.After preheating
Gaseous mixture (combustion zone) in the second macropore foamed ceramics burns, due to preheating so that ignition temperature increases, after and to mixing
Preheat the more heats of block transitive.Second mixing preheating zone is aperture foamed ceramics, effective to flame quenching effect using aperture
Tempering is prevented, while fired downstream heat production passes to mixing preheating zone by porous media high-termal conductivity and thermal emissivity rate, it is right
Incoming mixture efficiently preheats.As combustion chamber is stablized, combustion flame is submerged combustion, passes through heat radiation mode for downstream combustion zone
Heating can efficiently utilize the combustion heat.
Secondly, thermocouple 129 is set to burner inner casing 105, and one end of thermocouple 129 is stretched into the second cavity, profit
The data monitoring that is measured with thermocouple 129 simultaneously diagnoses porous media material service condition, predicts porous media material service life.
Meanwhile the data measured using thermocouple 129 preheat effective monitoring combustion conditions in air gas, feed back and adjust preheating
Operating parameter in equipment and heating space.
Also, sparking electrode 131 is disposed in proximity to the second macropore foamed ceramics by the inclination trepanning of burner housing 103
One end of plate 117, and for lighting the air gas of the end face of macrocellular foam ceramic wafer；Detecting electrode 133 by burner outside
The horizontal bore of shell 103 is inserted into the outlet end of the second macropore foamed ceramic panel 117, and the electron ion letter for detecting flame
Number.Flare up fire is monitored in real time by detecting electrode 133 and thermocouple 129, can effectively judge whether combustion gas is ignited simultaneously
Ensure to stablize burning.
In conclusion diffusion type porous medium burner 100 provided by the invention is, it can be achieved that the efficient and cleaning of fuel is fired
It burns, and adapts to the gas burning of different calorific values, while having and can be effectively prevented tempering, facilitate flame monitoring, predict and examine
The service condition of disconnected porous media material preheats the functions such as effective monitoring combustion conditions in air gas.
In detail, Fig. 2 is the structural schematic diagram of burner housing 103 provided in this embodiment.It please refers to Fig.1 and Fig. 2,
In the present embodiment, burner housing 103 includes the first steel plate 135 and is set to the first high-strength light of the first steel plate 135 and pours
Material feeding 137.The size of first cavity of burner housing 103 divides three-level degression type structure, front end maximum level-one to use from outside to inside
It is assembled in burner inner casing 105, intermediate level-one is for installing gas allocation disk 111 and as space gas diffusion admittance, finally
Level-one size ratio porous media board is bigger, for fixing porous media board portion in the cavity.
In detail, Fig. 3 is the structural schematic diagram of burner inner casing 105 provided in this embodiment.It please refers to Fig.1 and Fig. 3,
In the present embodiment, burner inner casing 105 includes the second steel plate 139 and is set to the second high-strength light of the second steel plate 139 and pours
Material feeding 141.Maximum level-one side's chamber size phase of 105 shape size of burner inner casing and the first cavity of burner housing 103
Match, be in two-layer configuration.Burner inner casing 105 has the second cavity being coaxially set with the first cavity, the leading portion of the second cavity
There are conduit through bore 143,143 end of through-hole is air distribution plate 119, and air buffer chamber is used as in the middle part of the second cavity, and second is empty
Chamber end is equipped with boss for fixing gas allocation disk 111.
Simultaneously, it should be noted that in the present embodiment, porous media, burning are damaged in order to facilitate dismounting and change intracavitary
Device inner casing 105 is poured into a mould with shell by steel plate and the high-strength light castable pasted on it, castable and steel plate anchor
Gu nail is reinforced, all it is connected with by Housing Base between shell and furnace wall wall surface, inner casing and shell.
Wherein, air distribution plate 119 is the third steel plate 145 with through-hole 143, and gas piping 127 may pass through through-hole 143
It is connected to gas allocation disk 111, third steel plate 145 is fixedly arranged on burner inner casing 105 by holder 147.Air distribution plate 119 can
Air is guided to be spread to cavity surrounding so that air is distributed in porous media sectional uniform, ensures air and coal gas in porous Jie
It is uniformly mixed in matter, ignition temperature is made to be uniformly distributed.Also, the quantity of holder 147 is 4, and every holder 147 runs through entire
Second high-strength light castable 141 of burner inner casing 105, and one end is connect with the second steel plate 139, the other end is distributed with air
Disk 119 is fixedly connected.Certainly, in other embodiments of the invention, the quantity of holder 147 can also be selected according to demand
It selects, the embodiment of the present invention does not limit.
Fig. 4 is the structural schematic diagram of gas allocation disk 111 provided in this embodiment.It please refers to Fig.1 and Fig. 4, in this implementation
In example, gas allocation disk 111 includes the distribution branch that distribution disc main body 149 and circumference array are set to distribution disc main body 149
151, it is formed for the channel for air-transport between adjacent distribution branch 151, and interval setting on every distribution branch 151
There are multiple gas outlets 153.Also, the center of circle air inlet for distributing disc main body 149 is fixedly connected with 127 end of gas piping, coal gas
It enters in ten branches, then is out dispersed into from each gas outlet 153 into porous foam ceramic plate, play and be uniformly distributed
Coal gas acts on.
As a preferred option, in the present embodiment, the quantity of distribution branch 151 is ten, and is being gradually distance from distribution
On the direction of disc main body 149, the radial diameter of the gas outlet 153 on every distribution branch 151 gradually increases.
Referring to Fig. 1, in the present embodiment, aperture foamed ceramic panel 115, the first macrocellular foam ceramic wafer 113,
The hole equivalent diameter of two macrocellular foam ceramic wafers 117 is between 0.4~5mm, and between 0.6~0.9, number of pores exists porosity
In the range of 10~60PPI, and the hole of the first macrocellular foam ceramic wafer 113 and the second macropore foamed ceramic panel 117 is more than small
The hole of hole foamed ceramic panel 115.
In detail, porous media material used by the embodiment of the present invention is aluminium oxide, aluminium oxide, silicon carbide or oxidation
Zirconium, is porous foam ceramic, and space structure is that netted or other shapes of trepanning or part open structure, shape can the sides of being
Shape, circle or irregular shape.Its hole equivalent diameter is between 0.4~5 millimeter, and porosity is 0.6~0.9 or so, hole
Number is in the range of 10~60PPI (the small hole count of per inch).Foamed ceramics is a kind of special porous media, density is small, intensity is big,
Permeability is good, heat-resisting, wear-resistant and corrosion-resistant, and thermal conductivity ratio metal material is small, but with gas phase than much bigger, thermal capacity
It is thousands of times big with thermal radiation capability ratio gas, it is the combustion field better than free space, the combustion chamber made with this kind of material can
Meet insulation requirements, and can guarantee good heat transfer effect, can realize low-BTU gas stablizes burning.It is more from airintake direction
Hole medium distinguishes upper, middle and lower and swims three regions, and each area filling has the foamed ceramics of different porosities, different pore size,
It is respectively the first mixing preheating zone, the second mixing preheating zone and combustion zone by effect.First mixing preheating zone is porous
Medium is macrocellular foam ceramic wafer, so that air and coal gas is acutely disturbed in foamed ceramics hole by the dispersion of porous media
It is uniformly mixed.Second mixing preheating zone is aperture foamed ceramics, so that air and coal gas is being steeped by the dispersion of porous media
It acutely disturbs in foam ceramic hole and is further uniformly mixed, while tempering is effectively prevent to flame quenching effect using aperture,
Fired downstream heat production simultaneously passes to preheating zone by porous media high-termal conductivity and thermal emissivity rate, efficiently pre- to incoming mixture
Heat.As combustion chamber is stablized, combustion flame is submerged combustion, is heated and can efficiently be utilized by heat radiation mode for downstream combustion zone
The combustion heat.
Meanwhile as a preferred option, in the present embodiment, for convenience replace damage foamed ceramic panel, each component by
It is bolted, facilitates each component dismounting recombination.Sparking electrode 131 is inserted by the trepanning tilted down in furnace lining on the outside
Enter inside porous media, for detecting flare up fire.Intracavitary from inside to outside successively arrangement be macrocellular foam ceramic wafer,
Aperture foamed ceramic panel 115, macrocellular foam ceramic wafer, gas allocation disk 111, air distribution plate 119, inner casing.Wherein, foam is made pottery
It is filled with fire resisting silica wool in the gap of porcelain plate and cavity.The air inlet of gas allocation disk 111 links solid with central gas pipe road 127
It is fixed.Air distribution plate 119 is bolted to the carbon steel holder 147 of inner shell bottom welding with surrounding centrally through gas piping 127
On.Inner casing is installed in shell level-one cavity, is located at outside air distribution plate 119, and inner casing center is steam line.Thermocouple 129
It is inserted into the second cavity by inner casing through-hole 143, for detecting the gas temperature into the first macrocellular foam ceramic wafer 113.
In hull outside, air inlet is connect with gas supply and air supply duct.
Air and coal gas are one-way flow, parallel to enter in burner, air by 119 guide functions of air distribution plate to
Cavity surrounding is spread, then by channel between 111 each branch of gas allocation disk even into the foamed ceramic panel of upstream.Pass through bubble
Foam ceramic end detecting electrode 133 monitors flare up fire in real time, judges to premix whether gas is ignited and stablizes burning.
Also, it is that the present invention is distinctive to improve porous media combustor whole system using thermocouple 129, passes through thermocouple
129 data measured are simultaneously combined with corresponding control system, may be implemented：(1) temperature, flare up fire act synergistically to monitor
Igniting and operating condition；(2) it can adapt to control of the different calorific value gases in burning porous medium internal combustion；(3) it can monitor and examine
Disconnected porous media material service condition, predicts porous media material service life；(4) it can be preheated in air gas effective
Combustion conditions are monitored, operating parameter in pre-heating device and heating space is fed back and adjust.
In conclusion the diffusion type porous medium burner 100 that the embodiment of the present invention provides has the beneficial effect that：
The diffusion type porous medium burner 100 of the present invention is, it can be achieved that the efficient and cleaning of fuel is burnt, and is adapted to not
Gas with calorific value burns, while having and can be effectively prevented tempering, facilitates flame monitoring, predicts and diagnose porous media material
Service condition, preheat the functions such as effective monitoring combustion conditions in air gas.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of diffusion type porous medium burner, which is characterized in that including：
Burner body, the burner body include burner housing, burner inner casing and inlet channel, the burner
Inner casing is inserted into the first cavity of the burner housing, and is close to the side wall of the burner housing；The burner inner casing
With the second cavity for being connected to and being coaxially disposed with first cavity；The burner inner casing has along second cavity
The air distribution plate and gas allocation disk of axis direction setting；And in first cavity, the gas allocation side surface
Downstream area is disposed with the first macrocellular foam ceramic wafer, aperture foamed ceramic panel and the second macropore foamed ceramic panel；Institute
State the air distribution plate that there is burner inner casing the axis direction along second cavity to be arranged；The inlet channel is set to institute
Burner inner casing is stated, and includes gas inlet, air intlet, air pipeline and what is be connected to the gas inlet be set to institute
The gas piping in air pipeline is stated, the gas inlet passes through the gas piping and the coal gas point across the air distribution plate
It is connected to disk, the air intlet is connected to by the air pipeline with the air distribution plate；
Thermocouple is set to the burner inner casing, and one end of the thermocouple is stretched into second cavity, and for examining
Survey the gas temperature for entering the first macrocellular foam ceramic wafer；
Sparking electrode, the one of the second macropore foamed ceramic panel is disposed in proximity to by the inclination trepanning of the burner housing
End, and for lighting the air gas of the end face of the macrocellular foam ceramic wafer；
Detecting electrode is inserted into the outlet of the second macropore foamed ceramic panel by the horizontal bore of the burner housing
End, and the ionization subsignal for detecting flame.
2. diffusion type porous medium burner according to claim 1, it is characterised in that：
The burner housing includes the first steel plate and is set to the first high-strength light castable of first steel plate.
3. diffusion type porous medium burner according to claim 1, it is characterised in that：
The burner inner casing includes the second steel plate and is set to the second high-strength light castable of second steel plate.
4. diffusion type porous medium burner according to claim 3, it is characterised in that：
The air distribution plate is the third steel plate with through-hole, and the gas piping may pass through the through-hole and the coal gas point
It is connected to disk, the third steel plate is fixedly arranged on the burner inner casing by holder.
5. diffusion type porous medium burner according to claim 4, it is characterised in that：
The quantity of the holder is 4, and second lightweight that the every holder runs through the entire burner inner casing is high
Strong castable, and one end is connect with second steel plate, the other end is fixedly connected with the air distribution plate.
6. diffusion type porous medium burner according to claim 1, it is characterised in that：
The gas allocation disk includes the distribution branch that distribution disc main body and circumference array are set to the distribution disc main body, phase
Formed between the adjacent distribution branch for the channel for air-transport, and every distribution branch be arranged at intervals on the road it is multiple go out
Gas port.
7. diffusion type porous medium burner according to claim 6, it is characterised in that：
The quantity of the distribution branch is ten, and on the direction for being gradually distance from the distribution disc main body, every distribution branch
On the radial diameter of gas outlet gradually increase.
8. diffusion type porous medium burner according to claim 1, it is characterised in that：
The aperture foamed ceramic panel, the first macrocellular foam ceramic wafer, the second macropore foamed ceramic panel hole work as
Diameter is measured between 0.4~5mm, porosity is between 0.6~0.9, and number of pores is in the range of 10~60PPI, and described the
One macrocellular foam ceramic wafer is more than the hole of the aperture foamed ceramic panel with the hole of the second macropore foamed ceramic panel.
9. diffusion type porous medium burner according to claim 8, it is characterised in that：
The aperture foamed ceramic panel, the first macrocellular foam ceramic wafer, the second macropore foamed ceramic panel are pros
The porous media of shape, space structure is netted, and material is aluminium oxide, silicon carbide or zirconium oxide.
10. diffusion type porous medium burner according to claim 1, it is characterised in that：
The diffusion type porous medium burner further includes being connected to the ventilation duct of the air intlet and being connected to the coal
The steam line of gas import.
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| CN201810466678.7A CN108443884B (en) | 2018-05-15 | 2018-05-15 | Diffusion type porous medium burner |
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| CN201810466678.7A CN108443884B (en) | 2018-05-15 | 2018-05-15 | Diffusion type porous medium burner |
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| CN108443884B CN108443884B (en) | 2023-11-03 |
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Cited By (1)
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| CN109869903A (en) * | 2019-01-31 | 2019-06-11 | 佛山市浩丰重工有限公司 | A kind of fuel gas hot-blast stove |
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| CN108443884B (en) | 2023-11-03 |
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