CN209470207U - Gas Infrared combustion system - Google Patents
Gas Infrared combustion system Download PDFInfo
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- CN209470207U CN209470207U CN201821708698.2U CN201821708698U CN209470207U CN 209470207 U CN209470207 U CN 209470207U CN 201821708698 U CN201821708698 U CN 201821708698U CN 209470207 U CN209470207 U CN 209470207U
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Abstract
The utility model discloses Gas Infrared combustion systems.Including burner, mixing chamber is set in the burner, the mixing chamber is airtight half enclosing structure, setting baffle and perforated distributor in mixing chamber, in mixing chamber opening placing ceramic fiber combustion medium, ceramic fibre combustion medium bottom is carried on perforated distributor, and ceramic fibre combustion medium upper surface surrounding is compacted fix with pressing plate, and the ceramic fibre combustion medium is ceramic fiber blanket.Ceramic fibre is made as fibrofelt with layer paving technique by the utility model, this felt just has anisotropic thermal conduction characteristic: in-plane thermal coefficient is big, dielectric surface temperature is uniform when work, and thickness direction thermal coefficient is small simultaneously, to promote anti-tempered performance.
Description
Technical field
The utility model belongs to Gas Infrared technical field of heating, and in particular to the Gas Infrared of full premix or half premix
Combustion system.
Background technique
The disposal of pollutants that combustion process generates accounts for the sizable specific gravity of atmosphere pollution, and country is carrying out energy resource structure tune
It is whole, increase natural gas consumption specific gravity, especially in middle-size and small-size dispersed user, releases coal and change gas policy, need to develop and be fired for gas
The energy conservation and environmental protection technology of material.
Conventional gas fuel combustion has atmospheric burning type, and the technologies type such as diffusion type burning and premixed combustion is generally existing
Following problem: non-uniform temperature；It burns insufficient；NOxDischarge is high；Flame blackness is low, and radianting capacity is low；Combustion space is big；Fire
Flame shape bad adaptability；Combustion noise is big；Stability is poor；Current environmental protection standard is substantially improved, to NOxEmission limit is increasingly
It is low, it is badly in need of exploitation low-NO_x combustion technology.Low nitrogen burning there are many solution, wherein full premix combustion technology take off grain husk in recent years and
Out, cause scientific worker and terminal user more and more pays close attention to.
Full premix combustion is to realize that air, coal gas are sufficiently premixed before burning, and gaseous mixture quickly completes after passing through porous plate
Combustion process, combustion space is small, and pollutant emission is low, and temperature is uniform, and porous plate heating is in red-hot state by burning, emits infrared
Line, due to emitting the matching principle of light source and workpiece absorption spectrum, can substantially save heat energy to heat workpiece.So
Full premix combustion technology is generally referred to as Gas Infrared heating technique.
The mature of full premix combustion technology experienced different phase, mainly the skill in terms of porous burner dielectric material
Art develops, expanded metal, arrives ceramic honeycomb plate (inertia or catalysis), unordered hole ceramic wafer, and fibrofelt is many kinds of.
Full premix combustion technological system has multiple technical evaluation index, and such as high-temperature corrosion resistance performance, resists back resistance to heat shocks energy
Fiery performance, heat resistanceheat resistant acoustic vibration performance, surface calorific intensity, high temperature microstructure stability, performance of anti-blockage, pollutant emission level, table
Surface radiation ability；Thermal inertia, drag losses, temperature uniformity, structural stability, production cost etc., these evaluation indexes it
Between often there is contradiction, i.e., another index can decline when an index is promoted, such as high temperature corrosion and resistance to heat shocks energy
Be exactly a pair of of technical contradiction, using metal material good thermal shock but high temperature corrosion it is poor, it is then on the contrary using ceramic material.Again
For example surface temperature uniformity and anti-tempered performance are a pair of of technical contradiction again, surface temperature uniformity requirement dielectric material is thermally conductive
Property will be got well, and temper resistance then requires material thermal conductivity as small as possible.In addition porous media material, which also needs to have simultaneously, compares table
The feature that area is as big as possible while structural stability is strong.
The prior art tends not to collaboration and promotes above-mentioned evaluation index.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the utility model provides Gas Infrared combustion system,
Purpose is that by brittle ceramic material originally, this material is just provided simultaneously with ceramics and metal at micro-ceramic fiber
The advantages of, that is, retain energy high-temperature corrosion resistance characteristic, and increase ability heat-shock because fibrous material has sufficiently flexible property
Characteristic, thus solve the problems, such as many evaluation indexes collaboration promoted.
To achieve the above object, the utility model provides Gas Infrared combustion system, including burner, the burner
Interior setting mixing chamber, the mixing chamber are airtight half enclosing structure, setting baffle and perforated distributor in mixing chamber, in mixing chamber
Opening placing ceramic fiber combustion medium, ceramic fibre combustion medium bottom are carried on perforated distributor, ceramic fibre combustion
It burns medium upper surface surrounding and is compacted fix with pressing plate.
According to the utility model embodiment, the ceramic fibre combustion medium is ceramic fiber blanket, the ceramic fiber blanket
It is flat shape, cylindrical shape or spherical shape；Array through hole is opened on the ceramic fiber blanket.
According to the utility model embodiment, the burner is equipped with ignition electrode and fire is visited.
According to the utility model embodiment, the burner lower part connection premix blower, the premix blower is connected with text
Venturi adjusts valve group；The Venturi tube adjusts setting screw in valve group, for manually adjusting air-fuel ratio.
According to the utility model embodiment, the burner be furnished with combustion controller, for control igniting, premix blower and
Valve group is adjusted to cooperate.
According to the utility model embodiment, the burner includes shell, and the shell uses sandwich, is led in interlayer
Cooling gas.
According to the utility model embodiment, light heat-insulating material is provided between the perforated distributor and pressing plate.
According to the utility model embodiment, increase porous or net metal or ceramics outside the ceramic fibre combustion medium
Plate, it is preferred to use silicon carbide material porous plate；Retain between porous or net metal or ceramics and ceramic fibre combustion medium empty
Gap.
According to the utility model embodiment, the ceramic fibre combustion medium preferably uses silicon carbide material.
According to the utility model embodiment, setting protection shell outside the ceramic fibre combustion medium.
In general, the above technical solutions conceived by the present invention are compared with the prior art, due to the provision of
Gas Infrared heating fuel system, can achieve the following beneficial effects.
Ceramic fibre is made as fibrofelt with layer paving technique, this felt just has anisotropic thermal conduction characteristic: plane
Direction thermal coefficient is big, and dielectric surface temperature is uniform when work, and thickness direction thermal coefficient is small simultaneously, to promote anti-tempering
Performance.
Porous ceramic fiber felt production method can refer to Chinese patent literature CN105347836A, and CN105967713A's says
It is bright.
Ceramic fibre is made as fibrofelt with layer paving technique, this felt just has anisotropic thermal conduction characteristic: plane
Direction thermal coefficient is big, and dielectric surface temperature is uniform when work, and thickness direction thermal coefficient is small simultaneously, to promote anti-tempering
Performance.
Using the one-dimensional material production fibrous layer paving felt for having higher-strength, chemical vapor deposition or polymer are then used
The mode of infiltration cracking carries out the solidification bonding of material, and fibrous layer spreads felt voidage height, existing high specific surface area, but also with foot
Enough structural stabilities.
Detailed description of the invention
Fig. 1 is Gas Infrared combustion system schematic diagram.
Fig. 2 is burner top view.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the front view of Fig. 2.
Fig. 5 is the master drawing of porous plate.
Wherein: 1- square steel；2- perforated distributor；3- pressing plate；4- mounting plate；5- ignition electrode and fire are visited；The side 6- steel pipe；7-
Lower part steel pipe；8- ceramic fiber blanket；9- flange；10- fiber cloth；11- bottom plate；12- is porous or net metal or ceramic wafer.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below
The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.
Gas Infrared combustion system, including burner, the burner is interior to be arranged mixing chamber, and the mixing chamber is airtight half
Enclose structure, setting baffle and perforated distributor in mixing chamber, in mixing chamber opening placing ceramic fiber combustion medium, ceramics
Fiber combustion medium bottom is carried on perforated distributor, and ceramic fibre combustion medium upper surface surrounding is compacted fix with pressing plate；
The ceramic fibre combustion medium is ceramic fiber blanket, and the ceramic fibre combustion medium uses patent announcement number
It is prepared by the method for CN105347836A or CN105967713A.
Patent announcement CN105347836A discloses a kind of preparation method of ceramic fibre porous burner medium, and step is such as
Under:
Step 1 prepares stable ceramic fibre suspension: by ceramic fibre and polymer solution 0.4g:400ml
Ratio is uniformly dispersed to obtain stable ceramic fibre suspension；
Step 2 prepares ceramic fiber paper: filter ceramic fibre suspension, obtain having self-supporting effect, fiber with
The single-layer ceramic fibrous paper of machine orientation；The single-layer ceramic fibrous paper is with a thickness of 0.5-0.7mm；
Step 3 prepares layered porous fibrofelt: 4-8 layers of ceramic fiber paper being carried out lamination, applies pressure and obtains thickness
Degree is the fibrofelt of 2 ~ 5mm, then using thermosetting adhesive connection solidification, obtains ceramic fiber blanket precast body；
Step 4: being split on ceramic fiber blanket precast body skeleton using chemical meteorology deposition CVD method or polymer infiltration
Solution PIP method prepares ceramic phase, the fibrofelt precast body being prepared to Connection Step 3.
The ceramic fibre are as follows: SiC fiber, mullite fiber or cordierite fibers.
The ceramic fibre length is 4-50mm, and diameter is 5-17 μm.
The polymer solution are as follows: PVAC polyvinylalcohol solution or carboxyl methyl cellulose.
Patent announcement CN105967713A discloses the gradient pore structured ceramic fibre porous burner medium of one kind
Preparation method, steps are as follows:
Step 1: shorter ceramic fibre and longer ceramic fibre being dispersed in a polymer solution respectively, obtained
Two kinds of ceramic fibre suspensions；The shorter ceramic fibre is 3-7mm；The longer ceramic fibre is 10-20mm；It is described
The ratio of ceramic fibre and polymer solution is 0.4g ︰ 400ml；
Step 2: two kinds of ceramic fiber papers, single-layer ceramic are prepared to two kinds of ceramic fibre suspensions respectively using suction method
Fiber
Paper thickness is between 0.5-0.7mm；
Step 3: every kind of ceramic fiber paper being formed into multi-layer ceramics fibrous paper with 2-4 lamination, then by two kinds of multi-layer ceramics fibres
Tie up paper
Superposition forms the gradient porous fibrofelt of stratiform, and then pressurization obtains designing the fibrofelt of required thickness；
Step 4: fibrofelt being placed in CVD furnace and carries out chemical vapor deposition BN boundary layer and deposition SiC shell preparation pottery
Porcelain phase；
Or then fibrofelt is placed in CVD furnace after progress chemical vapor deposition BN boundary layer using polymer infiltration cracking
Method deposition SiC shell prepares ceramic phase.
The method replaces shorter ceramic fibre with thinner ceramic fibre, is replaced with thicker ceramic fibre longer
Ceramic fibre；The thinner ceramic fibre is 3-5 μm；The thicker ceramic fibre is 7-14 μm.
The ceramic fibre is the oxide fibre with antioxygenic property or the non-oxidized substance fiber with passivation ability.
The ceramic fibre is the oxide fibre with antioxygenic property or the non-oxidized substance fiber with passivation ability
For SiC fiber, Al 2 O 3Fiber, mullite fiber or cordierite fibers.
The polymer solution is PVAC polyvinylalcohol solution or carboxyl methyl cellulose.
In the step 1, one layer of nonionic surfactant is coated on the surface of two kinds of ceramic fibres.
The parameter of chemical vapor deposition BN boundary layer in the step 4 are as follows: at 750 DEG C, BCl 4
And NH 3It for reaction gas, is passed through in reaction chamber according to the ratio of 1:3, deposition obtains BN boundary layer under argon gas protection gas.
As shown in Figure 1, Gas Infrared heating fuel system, including burner, burner lower part connection premix blower are described
Premix blower is connected with Venturi tube, adjusts valve group；The Venturi tube adjusts setting screw in valve group, for manually adjusting
Air-fuel ratio；Burner is furnished with combustion controller, is used to control igniting, premixes blower and adjusts valve group collaborative work.
As shown in Figure 2-5, mixing chamber is set in burner, and the mixing chamber is airtight half enclosing structure, is set in mixing chamber
Baffle and perforated distributor 2 are set, in mixing chamber opening placing ceramic fiber combustion medium, ceramic fibre combustion medium bottom is held
It is loaded on perforated distributor 2, ceramic fibre combustion medium upper surface surrounding is compacted fix with pressing plate 3；The ceramic fibre burning
Medium is ceramic fiber blanket 8；Ignition electrode is installed on burner and fire visits 5；Burner housing is square steel 1, and square steel 1 is surrounded by
Side steel pipe 6, square steel 1 are equipped with mounting plate 4, lower part steel pipe 7 are arranged among burner；It is set between perforated distributor 2 and pressing plate 3
It is equipped with light heat-insulating material；Light heat-insulating material is fiber cloth 10, is increased outside ceramic fibre combustion medium porous or netted
Metal or ceramics 12, it is preferred to use silicon carbide material porous plate；Porous or net metal or ceramics 12 are situated between with ceramic fibre burning
Retain gap between matter；Burner bottom plate 11 is connect with lower part steel pipe using flange 9.
Embodiment 1.
Coal gas enters Venturi tube side-entrance through adjusting valve group, and combustion air is entered by Venturi tube center port, in Wen Qiu
In manifold close after, into premix blower, by pre-mixed air machine active boost air feed, gaseous mixture through connecting tube enter burner mix
Chamber, mixing chamber are airtight half to enclose structure, intracavitary interior setting baffle and perforated distributor 2, keep gaseous mixture as uniform as possible into
Enter and penetrates porous ceramic fiber combustion medium.Ceramic fibre combustion medium places mixing chamber opening, and bottom is carried on porous
On air distribution plate 2, medium upper surface surrounding is compacted fix with metal platen 3.
Heat, ceramic fibre combustion medium and pressing plate 3 are transmitted to reduce porous ceramic fiber combustion medium to other components
Light heat-insulating material is provided between perforated distributor 2.
Burner is equipped with ion ignition and flame detection device, adjusts valve group and is integrated with security control and air-fuel ratio regulation
Function is equipped with air-fuel ratio and manually adjusts screw, and Venturi tube is also equipped with air-fuel ratio and manually adjusts screw, and pre-mixed air equipment is standby
Continuous revolving speed adjusts function, and using there is Explosion-proof Design, in rotation speed of fan variation, Venturi tube can maintain automatically air-fuel ratio steady
It is fixed.
Burner is furnished with combustion controller, controls ignition system, blower and regulating valve collaboration by combustion controller when work
Work, controller have local operation and remote control function.
Burner housing temperature overtemperature in order to prevent, causes premixer to be tempered, and burner need to design cooling device, such as shell
Using sandwich, lead to cooling gas in interlayer.
According to power throttling states, infrared state is presented at combustion medium when burner works and (burns in surface materials
Middle progress), blue-flame state (dielectric surface present in blue short flame) according to air-fuel ratio regulation state yellow flame state can also be presented
(auxiliary air participation subsequent combustion).
The Gas Infrared heating fuel system that embodiment 1 designs has following advantage.
Ceramic fibre medium has resistant against high temperatures corrosion and thermal shock characteristic, compares other schemes (such as metal fiber felt)
Long service life.
Ceramic fibre coefficient of blackness is high, has very strong infra-red radiation ability；The substances such as this infrared radiation spectrum and water
Absorption spectrum matched, therefore the burning heater thermal efficiency is high.
Due to avoiding low-power tempering well and high power be tempered problem using ceramic fibre porous burner medium,
Combustion system has wider adjusting ratio, and surface power load is in 100kw/m2 ~ 3000kw/m2Between adjustable, dielectric surface temperature
500~1200℃。
Combustor flame temperature is uniform, and combustion process quickly completes, therefore pollutant emission is extremely low, in close theoretical air-fuel
Than situation CO2And NOXDischarge can reach 20PPM, be far below requirements of the national standard, and combustion noise is effectively suppressed.
For the combustion medium coefficient of expansion close to zero, when work, will not generate change in shape, be suitble to be designed to that large area is infrared
Heating device.
Combustion medium voidage is high, light specific gravity, and resistance damage is small, and thermal inertia is small, adapts to flexible intelligent control requirement, Ke Yisui
Qi Suiting, PULSE HEATING.
Embodiment 2.
Porous or net metal or ceramic wafer 12 are further added by outside ceramic fibre combustion medium in 1 scheme of embodiment, preferably
Retain using silicon carbide material porous plate, between porous or net metal or ceramic wafer 12 and ceramic fibre combustion medium certain empty
Gap.Increased gap and porous plate make premix gas across ceramic fiber blanket 8 but also imperfect combustion, fast in narrow space
Speed completes combustion process, and then high-temperature flue gas is along porous plate aperture high speed ejection.
Burner surface thermal load can be promoted using 2 scheme of embodiment, high-temperature flue gas flowing is organized again, is being mentioned
It rises on burner radiant heat transfer capability foundation discussion, further promotes high-temperature flue gas convective heat transfer ability.It can be used for realizing to workpiece
High speed impact heating, such as steel plate.
Premix combustion systems using ceramic fiber blanket 8 are various informative, can use power air supply device, be also possible to nothing
Power air supply device can be full premix, can also be half premix, can be premix before blower and premixes after can also be blower.To mention
The materials'use service life is risen, purifying processing device can be installed additional in space gas pipeline depending on concrete application condition, it can also be outside dielectric material
Install protection shell additional；Array through hole can also be opened on dielectric material depending on concrete application condition.Combustion medium can be planar shaped
Shape, cylindrical shape or spherical shape etc..Above-mentioned application mode is in scope of protection of the utility model.
Claims (9)
1. Gas Infrared combustion system, including burner, which is characterized in that mixing chamber, the mixing are arranged in the burner
Chamber is airtight half enclosing structure, and setting baffle and perforated distributor in mixing chamber are fired in mixing chamber opening placing ceramic fiber
Medium is burnt, ceramic fibre combustion medium bottom is carried on perforated distributor, ceramic fibre combustion medium upper surface surrounding pressure
Plate compacting is fixed；The ceramic fibre combustion medium is ceramic fiber blanket.
2. Gas Infrared combustion system according to claim 1, which is characterized in that the ceramic fiber blanket is planar shaped
Shape, cylindrical shape or spherical shape；Array through hole is opened on the ceramic fiber blanket.
3. Gas Infrared combustion system according to claim 1, which is characterized in that be equipped with ignition electrode on the burner
And fire is visited.
4. Gas Infrared combustion system according to claim 1, which is characterized in that the burner lower part connects pre-mixed air
Machine, the premix blower are connected with Venturi tube, adjust valve group；The Venturi tube adjusts setting screw in valve group, is used for hand
Dynamic adjusting air-fuel ratio.
5. Gas Infrared combustion system according to claim 1-4, which is characterized in that the burner is equipped with combustion
Burning controller premixes blower and adjusting valve group cooperates for controlling igniting.
6. Gas Infrared combustion system according to claim 1, which is characterized in that the burner includes shell, described
Shell uses sandwich, leads to cooling gas in interlayer.
7. Gas Infrared combustion system according to claim 1, which is characterized in that between the perforated distributor and pressing plate
It is provided with light heat-insulating material.
8. Gas Infrared combustion system according to claim 1, which is characterized in that outside the ceramic fibre combustion medium
Increase porous or net metal or ceramic wafer；Retain between porous or net metal or ceramic wafer and ceramic fibre combustion medium empty
Gap.
9. Gas Infrared combustion system according to claim 1, which is characterized in that outside the ceramic fibre combustion medium
Setting protection shell.
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| CN201821708698.2U CN209470207U (en) | 2018-10-22 | 2018-10-22 | Gas Infrared combustion system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821708698.2U CN209470207U (en) | 2018-10-22 | 2018-10-22 | Gas Infrared combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297020A (en) * | 2018-10-22 | 2019-02-01 | 武汉奇灵能环科技有限公司 | Gas Infrared combustion system |
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2018
- 2018-10-22 CN CN201821708698.2U patent/CN209470207U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297020A (en) * | 2018-10-22 | 2019-02-01 | 武汉奇灵能环科技有限公司 | Gas Infrared combustion system |
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