CN208205003U - A kind of diffusion type porous medium burner - Google Patents

Abstract

The utility model provides a kind of diffusion type porous medium burner, is 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；The first macrocellular foam ceramic wafer, aperture foamed ceramic panel and the second macropore foamed ceramic panel are disposed 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

A kind of diffusion type porous medium burner

Technical field

The utility model relates to multi-hole medium combustion technical fields, fire in particular to a kind of diffusion type porous medium Burner.

Background technique

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, the clean energy resourcies such as natural gas have larger space in China's development.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, burn extremely difficult, be easy tempering and It puts out, usually tail gas is taken as to be directly discharged into atmosphere.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 disadvantages 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: enhancing 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 for making gas burn greatly enhances.

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 thermal radiation capability number bigger than gas Thousand times, be the combustion field better than free space, is not only able to satisfy insulation requirements with the combustion chamber that this kind of material is made into, but also can guarantee Good heat transfer effect, be able to achieve 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 Substitution normal burner 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, multi-hole medium combustion technology there are no being used widely, is limited in the industrial production due to various limitations It in low-temperature heat field, and focuses mostly on towards the research of the porous media combustor of high temperature heating art in experimental study, does not have also Have and realizes extensive industrial application.High temperature heating art is industrial key, is energy consumption and pollutant emission Therefore the most important thing is badly in need of the porous media combustor that exploitation is 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 lower (lower than 1m/s) before combustion medium enters combustion zone, so small speed is using premix combustion 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, combines, has both been able to maintain more with multi-hole medium combustion if burning diffusion type The advantages of hole agent burns, and diffusion type burning can be played and be not easy the advantages of being tempered.

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 lower than 400 DEG C), since flame temperature is lower, 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 shows themselves in that

(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 with the increase of the three cubed multiple of temperature, backheat enhancing.When in long-term work or combustion When burning operating condition 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 easy to damage, 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 burning, which is used 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 detect 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 damage, 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 in use process 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 is unable to satisfy 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 be used to 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- Heating of the mixed gas in preheating zone also by porous media reflux heat, 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 so that 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, the energy that the energy and porous media that preheating heating is similarly subjected at gap are heated at reflux 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 the actual 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, the gas that these factors all will lead to after heat exchanger preheating is unable to reach or is more than design temperature, safety occurs 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.

Utility model content

The purpose of this utility model is to provide a kind of diffusion type porous medium burner, it can be achieved that fuel it is efficient and clear Clean burning, and the gas burning of different calorific values is adapted to, while having and can be effectively prevented tempering, facilitate flame monitoring, prediction And the service condition of porous media material is diagnosed, the functions such as effective monitoring combustion conditions in air gas preheating.

The utility model is realized in this way:

A kind of diffusion type porous medium burner, comprising:

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 including gas inlet, Air intlet, air pipeline and the gas piping being set in air pipeline being connected to gas inlet, gas inlet is through wearing 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 protruded 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 aperture 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 For detecting the ionization subsignal of flame.

Further, in the preferred embodiment of the utility model, burner housing includes the first steel plate and is set to First high-strength light castable of the first steel plate.

Further, in the preferred embodiment of the utility model, burner inner casing includes the second steel plate and is set to Second high-strength light castable of the second steel plate.

Further, in the preferred embodiment of the utility model, air distribution plate is the third steel plate with through-hole, coal Feed channel may pass through through-hole and be connected to gas allocation disk, and third steel plate is fixedly arranged on burner inner casing by bracket.

Further, in the preferred embodiment of the utility model, the quantity of bracket is 4, and every bracket runs through whole Second high-strength light castable of a burner inner casing, and one end is connect with the second steel plate, the other end is fixed with air distribution plate Connection.

Further, in the preferred embodiment of the utility model, gas allocation disk includes distribution disc main body and circumference Array 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 Item distribution branch road is arranged at intervals with multiple gas outlets.

Further, in the preferred embodiment of the utility model, the quantity for distributing branch is ten, and is being gradually distance from It distributes on the direction of disc main body, the radial diameter of the gas outlet of every distribution branch road is gradually increased.

Further, in the preferred embodiment of the utility model, aperture foamed ceramic panel, the first macrocellular foam ceramics Plate, the second macropore foamed ceramic panel hole equivalent diameter between 0.4~5mm, porosity is between 0.6~0.9, number of pores In the range of 10~60PPI, and the hole of the first macrocellular foam ceramic wafer and the second macropore foamed ceramic panel is steeped greater than aperture The hole of foam ceramic wafer.

Further, in the preferred embodiment of the utility model, aperture foamed ceramic panel, the first macrocellular foam ceramics The porous media that plate, the second macropore foamed ceramic panel are square, space structure is netted, and material is aluminium oxide, carbonization Silicon or zirconium oxide.

Further, in the preferred embodiment of the utility model, diffusion type porous medium burner further includes being connected to The ventilation duct of air intlet and the steam line for being connected to gas inlet.

Above scheme the utility model has the advantages that

The utility model provides a kind of diffusion type porous medium burner, including burner body, thermocouple, sparking electricity Pole and detecting electrode.Wherein, burner body includes burner housing, burner inner casing and inlet channel, in burner Shell is inserted into 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 connects including gas inlet, air intlet, air pipeline and with gas inlet 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 mix 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 and porous body carry out convection current and radiation heat transfer, increase mixture temperature.Gaseous mixture after preheating is steeped in the second macropore (combustion zone) burning in foam ceramics, it is 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, efficiently preheats 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 protruded 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 effective monitoring combustion conditions when air gas preheat, feed back and adjust in pre-heating device and heating space Operating parameter.

Also, electrode of striking sparks is disposed in proximity to the one of the second macropore foamed ceramic panel by the inclination aperture 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 guarantees to stablize burning.

In conclusion diffusion type porous medium burner provided by the utility model 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, facilitate flame monitoring, predicts simultaneously The service condition for diagnosing porous media material, the functions such as effective monitoring combustion conditions in air gas preheating.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is the structural schematic diagram for the diffusion type porous medium burner that the embodiments of the present invention provide；

Fig. 2 is the structural schematic diagram for the burner housing that the embodiments of the present invention provide；

Fig. 3 is the structural schematic diagram for the burner inner casing that the embodiments of the present invention provide；

Fig. 4 is the structural schematic diagram for the coal gas dispersion impeller that the embodiments of the present invention provide.

Icon: 100- diffusion type porous medium burner；101- burner body；103- burner housing；105- burning Device inner casing；111- gas allocation disk；113- the first macrocellular foam ceramic wafer；115- aperture foamed ceramic panel；The second macropore of 117- Foamed ceramic panel；119- air distribution plate；121- gas inlet；123- air intlet；125- air pipeline；127- gas pipe Road；129- thermocouple；131- sparking electrode；133- detecting electrode；The first steel plate of 135-；137- the first high-strength light castable； The second steel plate of 139-；141- the second high-strength light castable；143- through-hole；145- third steel plate；147- bracket；149- distribution plate Main body；151- distributes branch；The gas outlet 153-.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.Therefore, below to attached The detailed description of the embodiments of the present invention provided in figure is not intended to limit the range of claimed invention, But it is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, ordinary skill people Member's every other embodiment obtained without creative efforts, belongs to the model of the utility model protection It encloses.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

In the description of the utility model embodiment, it should be noted that term " center ", "upper", "lower", " left side ", The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "inner", "outside" is orientation based on the figure or position Relationship or the utility model product using when the orientation or positional relationship usually put, be merely for convenience of describing this reality It is described with novel with simplified, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific Orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " It is described etc. being only used for distinguishing, is not understood to indicate or imply relative importance.

In the description of the utility model embodiment, it is also necessary to which explanation is unless specifically defined or limited otherwise, art Language " setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachable Connection, or be integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, centre can also be passed through Medium is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can specific feelings Condition understands the concrete meaning of above-mentioned term in the present invention.

In the present invention unless specifically defined or limited otherwise, fisrt feature is on or below second feature It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature the Right above two features and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is in the second spy Under sign, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature level Height is 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, comprising: 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 are inserted into the first cavity of burner housing 103, and are 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 including 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 each branch of gas allocation disk 111 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 and porous body carry out convection current and radiation heat transfer, increases mixture temperature.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 protruded into the second cavity, benefit 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 effective monitoring combustion conditions when air gas preheat, it feeds back and adjusts preheating Operating parameter in equipment and heating space.

Also, electrode 131 of striking sparks is disposed in proximity to the second macropore foamed ceramics by the inclination aperture 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 passes through outside burner 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 Guarantee to stablize burning.

In conclusion diffusion type porous medium burner 100 provided by the utility model, it can be achieved that fuel it is efficient and clear Clean burning, and the gas burning of different calorific values is adapted to, while having and can be effectively prevented tempering, facilitate flame monitoring, prediction And the service condition of porous media material is diagnosed, the functions such as effective monitoring combustion conditions in air gas preheating.

In detail, Fig. 2 is the structural schematic diagram of burner housing 103 provided in this embodiment.Fig. 1 and Fig. 2 are please referred to, 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 from outside to inside, and front end maximum level-one is used 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 is more bigger than porous media board, 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.Fig. 1 and Fig. 3 are please referred to, 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, in two-level 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, in order to facilitate the intracavitary impaired porous media of dismounting and change, burning Device inner casing 105 and shell are poured 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 bracket 147.Air distribution plate 119 can It guides air to spread to cavity surrounding, so that air is distributed in porous media sectional uniform, guarantees air and coal gas in porous Jie It is uniformly mixed in matter, is uniformly distributed ignition temperature.Also, the quantity of bracket 147 is 4, and every bracket 147 is 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 and air distribute Disk 119 is fixedly connected.Certainly, in the other embodiments of the utility model, the quantity of bracket 147 can also carry out according to demand Selection, the embodiments of the present invention are without limitation.

Fig. 4 is the structural schematic diagram of gas allocation disk 111 provided in this embodiment.Fig. 1 and Fig. 4 are please referred to, 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 comes out and be dispersed into porous foam ceramic plate from each gas outlet 153, play and be uniformly distributed Coal gas effect.

As a preferred option, in the present embodiment, the quantity for distributing 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 is gradually increased.

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 greater than small The hole of hole foamed ceramic panel 115.

In detail, porous media material used by the embodiments of the present invention be aluminium oxide, aluminium oxide, silicon carbide or Zirconium oxide, is porous foam ceramic, and space structure is netted or other shapes of aperture or part open structure, and shape can be with It is rectangular, round or irregular shape.Its hole equivalent diameter between 0.4~5 millimeter, porosity 0.6~0.9 or so, Number of pores is in the range of 10~60PPI (the small hole count of per inch).Foamed ceramics is a kind of special porous media, and density is small, strong Degree 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 and thermal radiation capability are thousands of times bigger than gas, are the combustion field better than free space, the burning being made into this kind of material Room is not only able to satisfy insulation requirements, but also can guarantee good heat transfer effect, and be able to achieve low-BTU gas stablizes burning.From air inlet Direction porous media distinguishes upper, middle and lower and swims three regions, and each area filling has the foam pottery of different porosities, different pore size Porcelain,

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, disturbs air and coal gas acutely in foamed ceramics hole by the dispersion of porous media It is uniformly mixed.Second mixing preheating zone is aperture foamed ceramics, is steeping air and coal gas 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.Downstream combustion zone is as combustion chamber is stablized, and combustion flame is submerged combustion, and being heated by heat radiation mode efficiently to utilize The combustion heat.

Meanwhile as a preferred option, in the present embodiment, for convenience replacement damage foamed ceramic panel, each component by It is bolted, facilitates each component dismounting recombination.Sparking electrode 131 is inserted by the aperture tilted down in furnace lining on the outside

Enter inside porous media, for detecting flare up fire.It is 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.119 center of air distribution plate is bolted to the carbon steel bracket 147 of inner shell bottom welding with surrounding by 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 for entering 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, are entered in burner in parallel, air by 119 guide functions of air distribution plate to The diffusion of cavity surrounding, then by channel between each branch of gas allocation disk 111 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, improving porous media combustor whole system using thermocouple 129 is that the utility model is distinctive, passes through heat Data that galvanic couple 129 measures simultaneously are combined with corresponding control system, may be implemented: (1) temperature, flare up fire synergistic effect are come Monitors ignition and operating condition；(2) different calorific value gases be can adapt in the control of burning porous medium internal combustion；(3) it can monitor And porous media material service condition is diagnosed, predict porous media material service life；It (4) can be when air gas preheat Effective monitoring combustion conditions feed back and adjust operating parameter in pre-heating device and heating space.

In conclusion the diffusion type porous medium burner 100 that the embodiments of the present invention provide has the beneficial effect that

The diffusion type porous medium burner 100 of the utility model is, it can be achieved that the efficient and cleaning of fuel is burnt, and is fitted It answers the gas of different calorific values to burn, while having and can be effectively prevented tempering, facilitate flame monitoring, predict and diagnose porous media The service condition of material, the functions such as effective monitoring combustion conditions in air gas preheating.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of diffusion type porous medium burner characterized by comprising

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 State burner inner casing, and including 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 is passed through across the gas piping of the air distribution plate and the coal gas point 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 protruded into second cavity, and for examining Survey the gas temperature for entering the first macrocellular foam ceramic wafer；

Sparking electrode, is disposed in proximity to the one of the second macropore foamed ceramic panel by the inclination aperture 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 the first high-strength light castable for being set to 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 the second high-strength light castable for being set to 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 bracket.

5. diffusion type porous medium burner according to claim 4, it is characterised in that:

The quantity of the bracket is 4, and second lightweight that the every bracket 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 out 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 be gradually increased.

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 The hole of one macrocellular foam ceramic wafer and the second macropore foamed ceramic panel is greater than the hole of the aperture 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.