CN205746975U - A kind of natural gas low pollution combustor based on oil-poor half premixed combustion - Google Patents
A kind of natural gas low pollution combustor based on oil-poor half premixed combustion Download PDFInfo
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- CN205746975U CN205746975U CN201620550424.XU CN201620550424U CN205746975U CN 205746975 U CN205746975 U CN 205746975U CN 201620550424 U CN201620550424 U CN 201620550424U CN 205746975 U CN205746975 U CN 205746975U
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- oil
- boss
- combustion
- assembling stand
- venturi tube
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 80
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003345 natural gas Substances 0.000 title claims abstract description 25
- 239000000446 fuel Substances 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 13
- 239000007924 injection Substances 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 12
- 238000010304 firing Methods 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 208000028659 discharge Diseases 0.000 description 8
- 239000003245 coal Substances 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001597008 Nomeidae Species 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000013316 zoning Methods 0.000 description 1
Abstract
This utility model provides a kind of natural gas low pollution combustor based on oil-poor half premixed combustion, including premix section cyclone, air intake duct, assembling stand, combustion chamber body, described air intake duct is fixed on the leading portion of assembling stand, described combustion chamber body is fixed on the back segment of assembling stand, described premix section cyclone includes the Venturi tube being fixed in assembling stand center mounting hole, and is arranged on an axial swirler within Venturi tube；The rotary shaft hollow of described axial swirler, centre is used for being passed through gaseous fuel；Extend the radial aperture that is provided with of axial swirler rear end in rotating shaft, position of opening, between axial swirler and Venturi tube venturi, forms gas premixing and closes section in this region；This utility model, by two kinds of low emission technology direct-couplings of oil-poor for premix direct-injection, takes into account poor oil firing's potentiality in low emission simultaneously, it is ensured that fully burning is to reduce the discharge of low stain thing.
Description
Technical field
This utility model belongs to gas-turbine unit cleaning combustion field, especially a kind of based on oil-poor half premixed combustion
Natural gas low pollution combustor.
Background technology
Environmental pollution, especially atmospheric pollution, become the one of human survival and threaten greatly.In recent years, China various places haze
Taking place frequently, had a strong impact on our life, atmospheric pollution becomes unavoidable problem.Wherein industrial production activities is dirty to air
Dye is the most serious, industrial waste gas, life fuel, transportation emission etc., and these polluter are Fuel Selection and combustion after all
The problem of burning mode.
Traditional Fuel Selection kind, coal and oil are main bodys, and coal can produce substantial amounts of dust, and coal in burning
The essential element of charcoal is carbon, oxygen, hydrogen, nitrogen and sulfur, so can produce substantial amounts of SO after Ran Shao2And NOx, when imperfect combustion
Also can produce substantial amounts of unburned particulate matter；When oil and derivant thereof are as fuel, mainly can produce SO2、CO2、NOxDeng pollution
Thing.But natural gas is as novel clean energy resource, combustion process does not produce flue dust and solid emission, does not produces
SO2, wherein NOxDischarge also well below other several conventional fossil fuel.
Except the characteristic of fuel itself, combustion system is the most notable on the impact of pollutant emission.Along with to pollutant
The continuous intensification of emission mechanism understanding, research worker is gradually recognized primary discharge pollutant and ignition temperature, residence time, is mixed
Changing Pattern between gas composition with oil gas state is relevant, it is achieved low pollution emission it is crucial that form uniform flammable mixed gas, disappear
Except hot localised points and realization fully burning.Degree and zoning burning, lean premixed preevaporated (Lean are developed accordingly
Premixed Prevaporized, is called for short LPP) burning, (Rich-Quench-Lean is called for short in rich oil/quickly extinguishing/oil-poor
The low emissions combustion technology such as RQL) burning, oil-poor direct injection (Lean Direct Injection is called for short LDI) burning.
The most lean premixed preevaporated (LPP) combustion technology is to be evaporated and mixed with fuel completely uniformly feeding combustion zone,
Realize poor oil firing in combustion zone, the equivalent proportion of combustion zone is the least more can reduce NOXDischarge, this be known low emission potentiality
Big combustion technology.But the problems such as existence tempering, spontaneous combustion and the combustion instability of LPP combustion technology, and grinding in present stage
It is difficult in studying carefully overcome, occurs in that oil-poor direct injection (LDI) combustion technology for this.Oil-poor direct injection (LDI) combustion technology is just
It is to inject fuel directly into combustion zone, is formed about rich oil district, local in spray site and substantially improves firing characteristic, subsequently, fuel
Form uniform weak mixture with the high-speed rotational produced through cyclone, and then fully burn in combustion zone, eliminate local
Focus, reduces flame temperature, reaches the purpose of low emission.Owing to there is not the process that fuel is pre-mixed and evaporates, thus solve
Tempering present in LPP combustion technology of having determined and spontaneous combustion problems, but burn not when LDI combustion technology exists again low-power operation
Stable problem.
United States Patent (USP) " Premixing dry low NOx emissions combustor with lean direct
Injection of gas fuel " (US2001049932), it is proposed that a two-stage combustion room for fuel gas design,
Main combustion stage uses the combustion system of premix, it is achieved combustion with reduced pollutants during low power state, and secondary combustion chamber uses directly injection
Mode, power demand when utilizing the reliable operating characteristic of directly injection to supplement high-power.This utility model is a kind of point
The concept of level burning, but this utility model is by two kinds of low emission technology direct-couplings of oil-poor for premix direct-injection, with oil-poor half
The concept of premix realizes combustor low stain target.United States Patent (USP) " Lean direct injection combustor
System " (US2009229269), devise the combustion system of a set of oil-poor direct injection, be respectively adopted housing internal cavity and pipe
Road carries oxidant and fuel, until combustor inlet fuel the most really contacts with oxidant, and then mixed combustion.This design
Runner exist too much obstruction, fuel and air all have from large area passage enter loose structure, the mistake that runner reduces suddenly
Journey, flow losses are bigger.
Therefore, the purpose of this utility model is to provide a kind of natural gas combustion with reduced pollutants based on oil-poor half premixed combustion
Room is to improve the deficiencies in the prior art.
Utility model content
For the deficiencies in the prior art, this utility model provides a kind of based on oil-poor half premixed combustion natural
Gas low pollution combustor, by using fuel gas and based on oil-poor half premixed combustion, takes into account poor oil firing simultaneously, reduces
The discharge of pollutant, improve simultaneously efficiency of combustion, burning the most stable.
This utility model adopts the following technical scheme that a kind of natural gas combustion with reduced pollutants based on oil-poor half premixed combustion
Room, it is characterised in that include that premix section cyclone, air intake duct, assembling stand, combustion chamber body, described air intake duct are fixed on
The leading portion of assembling stand, described combustion chamber body is fixed on the back segment of assembling stand, and described premix section cyclone includes fixing
Venturi tube in assembling stand center mounting hole, and it is arranged on an axial swirler within Venturi tube；Described axial rotation
The rotary shaft hollow of stream device, centre is used for being passed through gaseous fuel；It is provided with radial aperture what axial swirler rear end was extended in rotating shaft,
Position of opening, between axial swirler and Venturi tube venturi, forms gas premixing and closes section in this region.By in rotating shaft
Hollow is passed through gaseous fuel, is then passed through radial aperture ejection, with air pre-mixing between axial swirler and Venturi tube venturi,
By two kinds of low emission technology direct-couplings of oil-poor for premix direct-injection, realize combustor low stain target and evade tempering and combustion
Burn unstable shortcoming, take into account poor oil firing's great potential in low emission simultaneously, it is ensured that fully burning reduces unburned hydrocarbon,
Reduce flame temperature, eliminate hot localised points to reduce NOx。
Improving further, described axial swirler meets swirling number, wherein axial rotational flow
Device is main according to mainly determining its swirling number according to interior outer radius and wall thickness, and in formula, r is axial swirler radial section position
The internal diameter at place, R is the external diameter of radial section position,For the damped coefficient of blade,For blade tip angle, according in formulaFor right
Answer the blade tip angle at r, thus can calculate axis cyclone (6) blade angle.
Improving further, on the basis of the physical dimension of Venturi tube, the exit interface of described axial swirler is to Wen
The distance of pipe venturi is 0.7 with the ratio of Venturi tube throat diameter, the ratio of axial swirler discharge area and Venturi tube throat area
With for 2.2.
Improving further, described air intake duct, assembling stand and combustion chamber body is all by Flange joint, wherein flange
Between shimming, it is ensured that good air-tightness.
Improving further, described fixed form is to be provided with two boss at the cyclone of mixing section, and respectively first is convex
Platform and the second boss, mounting seat is provided with the 3rd boss and two step troughs, the respectively first step trough and the second ladder
Groove, wherein the first step trough and the first boss are corresponding, and cooperation can position premix section cyclone, and the second boss and baffle plate are joined
Closing, with fixing premix section cyclone, the 3rd boss is coordinated with combustion chamber body by the 3rd step trough, it is ensured that air-tightness and together
Axle, the 3rd boss in order to fixed dam, baffle plate and the 3rd boss and cyclone outlet plane on same horizontal plane, dress
Join and seat against nearly air inlet cephalad direction and have the 4th boss, make assembling stand well by the 4th boss and air intake duct cooperation,
Further ensure good air-tightness and alignment.
Natural gas low pollution combustor based on oil-poor half premixed combustion of the present utility model uses gaseous natural gas, compares
In other tradition fossil fuel, producing dust and solid emission, not sulfur-bearing hardly, burning will not produce SO2, NOx's
Discharge is also well below other fuel, it is possible to be substantially reduced the pollution to atmospheric environment；Meanwhile, relative to liquid fuel, keep away
Exempt from the petroleum distribution inequality that fuel-oil atmozation etc. brings, the formation of the most flammable mixed gas, easily uniformly mixed with air, effectively
Elimination hot localised points, be substantially reduced the discharge of pollutant, fuel gas and air are easily formed the most mixed gas, it is possible to give full play to
The advantage of the combustor of low emission；Fuel vertical air inlet air incidence, carries out short-range premix, utilizes fuel not before igniting
Being uniformly distributed guarantee igniting and combustion stability reliably, after igniting, the eddy flow that cyclone produces may proceed to carry out with fuel
Mixing, combustion system, between premixed combustion and diffusion combustion, is sufficiently mixed after uniform flammable mixed gas fully burns
Can the most effectively reduce the discharge of pollutant；And Combustion chamber design is simple and compact for structure, processing technique is simple with assembling, main
Cyclone to be comprised, Venturi tube, hollow axle and front and back main thoroughfare；And may apply to many combustion gas whirlpools of traditional fuel
In the field of turbine, such as industrial generation, urban heat supplying；Also apply be applicable to civil engine low emissions combustion field.
Accompanying drawing explanation
Fig. 1 is this utility model natural gas based on oil-poor half premixed combustion low emission combustor structural representation；
Fig. 2 is the premix section cyclone of this utility model natural gas low emission combustor based on oil-poor half premixed combustion
And the structural representation of rotating shaft；
Fig. 3 is that the structure of the assembling stand of this utility model natural gas low emission combustor based on oil-poor half premixed combustion is shown
It is intended to；
Fig. 4 is that the structure of the air intake duct of this utility model natural gas low emission combustor based on oil-poor half premixed combustion is shown
It is intended to；
Fig. 5 is the knot of the combustion chamber body of this utility model natural gas low emission combustor based on oil-poor half premixed combustion
Structure schematic diagram.
Wherein: 1-premix section cyclone, 2-rotating shaft, 3-air intake duct, 4-assembling stand, 5-combustion chamber body, 6-axially revolves
Stream device, 7-Venturi tube, 8-the first boss, 9-the second boss, 10-the first step trough, 11-the second step trough, 12-the 3rd boss,
13-baffle plate, 14-the 4th boss, 15-the 3rd step trough, 16-flange, 17-pad.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
Refer to shown in Fig. 1-Fig. 5, this utility model uses natural gas to be fuel, based on oil-poor half premixed combustion low stain
Combustor, the rotating shaft 2 of use is different from the fuel nozzle of traditional band spray cone angle, but directly uniformly opens in rotating shaft 2 side
Hole, the present embodiment is the most uniformly to offer 8 radial direction through hole, and other quantity is also possible.Natural gas can be through rotating shaft
Being passed through, afterwards through the hole ejection offered, fuel injection direction is perpendicular to the air of cyclone outlet, and fuel is sheared with air and mixed
Mixed, inside the hollow of Venturi tube, preliminary half premix of realization, controls equivalent proportion and is less than 1, enters combustion chamber body 5 and realizes oil-poor combustion
Burn.
As in figure 2 it is shown, premix section cyclone 1 has two boss: the first boss 8 and the second boss 9, assembling stand 4 has two
Individual step trough: the first step trough 11 and the second step trough 12, and the 3rd boss 12.Wherein the first step trough 10 and first
Boss 8 corresponding location premix section cyclone 1, the second boss 9 and baffle plate 13 coordinate, and fix premix section cyclone 1, and the 3rd is convex
Platform 12 positioning baffle 13.Now baffle plate 13 and the 3rd boss and cyclone outlet plane are on same horizontal plane.Therein
Axial swirler 6 mainly determines its swirling number according to interior outer radius and wall thickness, r in formulaSFor axle
To the internal diameter of cyclone 6 radial section position, RSFor the external diameter of radial section position, r is swirler blades least radius,
R is swirler blades maximum radius,For the damped coefficient of blade,For blade tip angle.According in formulaFor the blade tip at corresponding r
Angle, thus can calculate axis cyclone 6 blade angle.Axial swirler 6 exit interface to Venturi tube venturi distance with
The ratio of Venturi tube 7 throat diameter is 0.7, and cyclone 6 discharge area is 2.2 with the ratio of Venturi tube 7 throat area.
As shown in Figures 3 and 4, the air inlet head of assembling stand 4 has the 4th boss 14, is allowed for by the 4th boss
Assembling stand 4 well coordinates with air intake duct 3, and ensure that good air-tightness and alignment.3rd boss 12 is by the simultaneously
Three step troughs 15 coordinate with combustion chamber body 5, it is ensured that air-tightness and axiality.
Refer to Fig. 1-Fig. 5 and combine shown in Fig. 5, in real work, air is entered in Venturi tube by air intake duct 3
Empty internal, i.e. at premix section, under the effect of premix section cyclone 1, produce eddy flow in the inside of Venturi tube, and in burning
Room body 5 head forms stable recirculating zone；Meanwhile, natural gas enters premix section by rotating shaft 2, and through being positioned at axle
Spraying in the hole offered between cyclone 6 and Venturi tube 7 venturi, natural gas now is vertically injected along air incidence direction,
Carry out partly-premixed from spray site to venturi outlet.Natural gas is carried out after the mixed gas entrance combustion chamber body 5 of air
Igniting, can continue to mix with air with post fuel, form the most uniform flammable mixed gas, and its combustion system is between premixed combustion
With between diffusion combustion, combustion chamber operational state is poor oil firing, can effectively reduce combustion flame temperature, reduce Air-pollution From Combustion
The discharge capacity of thing, particularly oxynitride.Control fuel and carry out poor oil firing with air equivalent than less than 1, post fuel of lighting a fire
Blend burning with air further, form the most mixed gas and reduce flame temperature with guarantee, eliminate hot localised points, reduce gas turbine
Combustor pollutant emission index.
Claims (5)
1. a natural gas low pollution combustor based on oil-poor half premixed combustion, it is characterised in that include premix section eddy flow
Device (1), air intake duct (3), assembling stand (4), combustion chamber body (5), described air intake duct (3) is fixed on the leading portion of assembling stand (4),
Described combustion chamber body (5) is fixed on the back segment of assembling stand (4), and described premix section cyclone (1) includes being fixed on dress
Join the Venturi tube (7) in seat (4) center mounting hole, and be arranged on the axial swirler (6) that Venturi tube (7) is internal；Institute
Stating rotating shaft (2) hollow of axial swirler (6), centre is used for being passed through gaseous fuel；Axial swirler is extended in rotating shaft (2)
(6) rear end be provided with radial aperture, position of opening is positioned between axial swirler (6) and Venturi tube (7) venturi, in this region shape
Gas premixing is become to close section.
Natural gas low pollution combustor based on oil-poor half premixed combustion the most according to claim 1, it is characterised in that institute
The axial swirler (6) stated meets swirling number, in formula, r is axial swirler (6) radial section
The internal diameter of position, R is the external diameter of radial section position,For the damped coefficient of blade,For blade tip angle.
Natural gas low pollution combustor based on oil-poor half premixed combustion the most according to claim 1, it is characterised in that with
On the basis of the physical dimension of Venturi tube (7), the distance of the exit interface of described axial swirler (6) to Venturi tube venturi and literary composition
The ratio of family name's pipe (7) throat diameter is 0.7, and cyclone outlet area is 2.2 with the ratio of Venturi tube throat area.
Natural gas low pollution combustor based on oil-poor half premixed combustion the most according to claim 1, it is characterised in that institute
Air intake duct (3), assembling stand (4) and the combustion chamber body (5) stated is all to be connected, wherein between flange (16) by flange (16)
Shimming (17).
Natural gas low pollution combustor based on oil-poor half premixed combustion the most according to claim 1, it is characterised in that institute
The fixed form stated is to be provided with two boss at the cyclone (1) of mixing section, the respectively first boss (8) and the second boss (9),
Assembling stand (4) is provided with the 3rd boss (12) and two step troughs, the respectively first step trough (10) and the second step trough
(11), wherein the first step trough (10) and the first boss (8) are corresponding, and cooperation can position premix section cyclone (1), and second is convex
Platform (9) and baffle plate (13) coordinate, fixing premix section cyclone (1), and the 3rd boss (12) is by the 3rd step trough (15) and combustion
Burning body (5) to coordinate, the 3rd boss (12) goes out in order to fixed dam (13), baffle plate (13) and the 3rd boss (12) and cyclone
Mouth plane is on same horizontal plane, and assembling stand (4) has the 4th boss (14), the 4th boss near air inlet cephalad direction
(14) assembling stand (4) is made to coordinate with air intake duct (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550424.XU CN205746975U (en) | 2016-06-08 | 2016-06-08 | A kind of natural gas low pollution combustor based on oil-poor half premixed combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550424.XU CN205746975U (en) | 2016-06-08 | 2016-06-08 | A kind of natural gas low pollution combustor based on oil-poor half premixed combustion |
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| Publication Number | Publication Date |
|---|---|
| CN205746975U true CN205746975U (en) | 2016-11-30 |
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ID=57360557
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| CN201620550424.XU Expired - Fee Related CN205746975U (en) | 2016-06-08 | 2016-06-08 | A kind of natural gas low pollution combustor based on oil-poor half premixed combustion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928008A (en) * | 2016-06-08 | 2016-09-07 | 南京航空航天大学 | Natural gas low-pollution combustion chamber based on lean semi-premixed combustion |
-
2016
- 2016-06-08 CN CN201620550424.XU patent/CN205746975U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928008A (en) * | 2016-06-08 | 2016-09-07 | 南京航空航天大学 | Natural gas low-pollution combustion chamber based on lean semi-premixed combustion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20190608 |