CN206803143U - A kind of low boiling fuel-staged combustion device and its system - Google Patents
A kind of low boiling fuel-staged combustion device and its system Download PDFInfo
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- CN206803143U CN206803143U CN201720572540.6U CN201720572540U CN206803143U CN 206803143 U CN206803143 U CN 206803143U CN 201720572540 U CN201720572540 U CN 201720572540U CN 206803143 U CN206803143 U CN 206803143U
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- fuel
- premixer
- room
- flaring
- air
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 58
- 238000009835 boiling Methods 0.000 title claims abstract description 37
- 239000000446 fuel Substances 0.000 claims abstract description 85
- 238000009987 spinning Methods 0.000 claims abstract description 47
- 239000007921 spray Substances 0.000 claims abstract description 13
- 238000013019 agitation Methods 0.000 claims abstract description 8
- 238000009792 diffusion process Methods 0.000 claims description 13
- 239000008246 gaseous mixture Substances 0.000 claims description 12
- 238000005338 heat storage Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 208000012886 Vertigo Diseases 0.000 description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000002309 gasification Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 210000003850 cellular structure Anatomy 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 241001212038 Arcola Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Spray-Type Burners (AREA)
Abstract
A kind of low boiling fuel-staged combustion system, including fuel reservoir, petrolift, evaporator, staged combustion device and blower fan.Petrolift will be heated into vaporized fuel in the low boiling fuel lifting in fuel reservoir to evaporator；Vaporized fuel sprays into pipe by vaporized fuel and enters staged combustion device；First air enters the First air chamber of staged combustion device by blower fan, is contacted with vaporized fuel in the end of vaporized fuel penetrating pipe and enters premixer, and premixer front end is in bottleneck shape, and spinning disk is located at premixer front portion, after bottleneck shape front end；After First air and vaporized fuel realize premix under the agitation of spinning disk, into the flaring room being connected with premixer, the igniter for being arranged on flaring room front end is lighted and starts to burn；Secondary Air enters flaring room postmedian from secondary air channel, maintains the stable burning of vaporized fuel.The utility model has the advantages that air-fuel good mixing effect, staged air distribution realize low nitrogen burning.
Description
Technical field
The utility model relates to a kind of low boiling fuel-staged combustion device and its system, more particularly to a kind of low
The apparatus system of low nitrogen burning is carried out after boiling point fuel vaporization.
Background technology
With attention of the public to air environmental pollution, the pollution of coal-fired Industrial Boiler, arcola faces severeer
Pressure is administered or closes down, therefore cleaning coal utilization technology is more and more paid attention to.And simultaneously, find cleaning alternative energy source
It is a kind of solution route, such as the regenerative resource such as biomass, or natural gas, alcohol-based fuel etc..
Alcohol-based fuel is generally low boiling fuel, is easier complete decomposition combustion, is a kind of replacement energy more cleaned
Source.But the ignition burning device of current comparative maturity is fuel oil or gas burner, is not fully adapted to alcohol-based fuel.It is various to be
The burner that alcohol-based fuel burns and designed has the combustor based on liquid fuel design（As CN105674261A,
CN106196045A etc.）, also there is gasification combustor（Such as CN105509047A, CN103196139A）.Current alcohol-based fuel gas
Change burner and the problems such as gasification result is poor, gasification installation is easily stifled be present, and liquid burner often opposed configuration complexity,
Effect is not sufficiently stable.In addition, the mode of igniting gasification is often difficult to effectively control excess air factor to ensure low nitrogen in burner
Burning.
Utility model content
The utility model is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of fractional combustion for low boiling fuel fills
Put and its system.
The utility model is achieved by the following technical solution：
A kind of low boiling fuel-staged combustion device, including vaporized fuel spray into pipe, First air chamber, premixer, flaring room
And igniter；The vaporized fuel sprays into the front end that pipe is arranged on premixer with First air chamber；The premixer be front end it is small, after
Big ampuliform structure is held, the spinning disk of umbrella diffusion arrangement is provided with premixer；The flaring room is connected to premixer rear end, is
It is beloid horn-like；The igniter is arranged on flaring room front end, i.e., at flaring chamber inlet；Flaring room postmedian is set
There is secondary air channel.
In above-mentioned technical proposal, premixer's section configuration is square or circular；One group of rotation is provided with the premixer
Flow, it is a spinning disk, a spinning disk is in umbrella diffusion arrangement；The length of side or diameter of the maximum through-flow section in the premixer
For D0, diameter projected of the spinning disk on the through-flow section in premixer be up to D1, D1For 0.4D0~0.6D0。
Another preferred scheme is that premixer's section configuration is square or circular；Be using fuel flow direction it is front and rear, it is described
The spinning disk of two groups of umbrella diffusion arrangements is sequentially provided with premixer from front to back, is a spinning disk and swirl flow piece；Institute
State the length of side of the maximum through-flow section in premixer or a diameter of D0, projection of the spinning disk on the through-flow section in premixer be straight
Footpath is up to D1, D1For 0.4D0~0.6D0；Diameter projected of the swirl flow piece on the through-flow section in premixer is up to D2,
D2For 0.6D0~0.8D0。
In above-mentioned technical proposal, flaring room end is provided with heat storage, and heat storage is cellular structure of refractory, uses
In the heat-accumulation combustion for forming vaporized fuel, ensure that burning is abundant while reducing First air and secondary air flow, reduce NOx generations.
In above-mentioned technical proposal, flaring room end is connected with combustion chamber, and combustion chamber is provided with tertiary-air pipe.
A kind of low boiling fuel-staged combustion system, it includes low boiling fuel-staged combustion device, and fuel reservoir,
Petrolift, evaporator and blower fan；Wherein
The fuel reservoir is used for the low boiling fuel of storing liquid；
Low boiling fuel lifting in fuel reservoir is arrived evaporator by the petrolift, and the evaporator is used for low boiling
Fuel is heated into vaporized fuel from liquid；
Vaporized fuel sprays into pipe into the front portion of staged combustion device by vaporized fuel；First air is entered by blower fan and divided
The First air chamber of level burner, contact into premixer and premixed in the end of vaporized fuel penetrating pipe with vaporized fuel；
Gaseous mixture after premix enters the flaring room being connected with premixer, and the igniter for being arranged on flaring room front end is lighted
Start to burn, and the gradual diffusion combustion in flaring room；
Secondary Air enters flaring room postmedian from secondary air channel, makes vaporized fuel burning more abundant.
In above-mentioned technical proposal, the air passes through with vaporized fuel in premixer flows through a spinning disk, in umbrella
Spinning disk of diffusion arrangement sheds lower turn into of agitation and premixes uniform gaseous mixture；
Or, the air and vaporized fuel in premixer by flowing through a spinning disk, the one of umbrella diffusion arrangement
Secondary spinning disk sheds the lower premix of agitation；Swirl flow piece is located at a spinning disk rear, swirl flow piece diameter projected D2It is more than
Spinning disk diameter projected D1, it is another that air and vaporized fuel continue through swirl flow piece after a spinning disk premixes
It is secondary to shed agitation and be mixed into uniform gaseous mixture.
In above-mentioned technical proposal, flaring room end is provided with heat storage, after secondary air channel tangentially enters in flaring room
The Secondary Air in portion is combustion-supporting to the premix mixed Daqu of burning, and the gaseous mixture of burning enters the flaring room end provided with heat storage,
The heat-accumulation combustion of vaporized fuel is formed in flaring room end, reduces First air and secondary air flow.
Connect combuster behind the flaring room, combustion chamber is provided with tertiary-air pipe, the uncombusted gaseous mixture in flaring room and
Flue gas enters combustion chamber, in the combustion-supporting lower fully burning of tertiary air tangentially sprayed into from tertiary-air pipe.
Compared with prior art, the beneficial effects of the utility model are：1st, low boiling carburretion and burner are separately set
Put, each part all easily optimizes so as to reach the target of global optimization；2nd, premix indoor design spinning disk enhances fuel and sky
The mixed effect of gas；3rd, behind premixer igniting be supplemented two, tertiary air multistage air distribution mode not only ensure burning fully again realization
Low nitrogen burning；4th, the heat storage body structure of flaring room ensures to reduce oxygen demand again while combustion efficiency, is further ensured that low nitrogen combustion
Burn.
Brief description of the drawings
Fig. 1 is that one kind involved by the utility model is used for low boiling fuel-staged combustion system schematic.
Fig. 2 is that one kind involved by the utility model is used for low boiling fuel-staged combustion schematic device.
Fig. 3 is that one kind involved by the utility model is used for spinning disk signal described in low boiling fuel-staged combustion device
Figure.
In figure：1- fuel reservoirs；2- petrolifts；3- evaporators；4- staged combustion devices；5- blower fans；6- steam states
Fuel sprays into pipe；7- First air chambers；8- premixers；Spinning disk of 9-；10- swirl flow pieces；11- flarings room；12-
Secondary air channel；13- heat storages；14- tertiary-air pipes；15- igniters；16- combustion chambers.
Embodiment
Concrete structure of the present utility model, operation method and implementation are carried out with embodiment below in conjunction with the accompanying drawings detailed
Discuss.
The orientation such as upper, lower, left, right, front and rear in present specification term be based on position relationship shown in the drawings and
Establish.Accompanying drawing is different, then corresponding position relationship is also possible to change therewith, therefore can not be interpreted as with this to protecting model
The restriction enclosed.
Low boiling fuel-staged combustion system described in the utility model, it is to include fuel lifting, vaporization and fractional combustion
Integrated artistic system, suitable for alcohol-based fuels such as methanol, ethanol, it is also applied for the low boiling fuel such as biodiesel.Such as Fig. 1 institutes
Show, low boiling fuel-staged combustion system described in the utility model includes fuel reservoir 1, petrolift 2, evaporator 3, fractional combustion
Device 4 and blower fan 5.For the low boiling fuel storage of liquid in fuel reservoir 1, petrolift 2 lights the low boiling in fuel reservoir 1
Material extracts, in lifting to evaporator 3, and the low boiling fuel of liquid is heated to form vapour in evaporator 3 by modes such as electrical heating
State fuel.
As shown in Fig. 2 the staged combustion device 4, which includes vaporized fuel, sprays into pipe 6, First air chamber 7, premixer 8, flaring
Room 11 and igniter 15.Vaporized fuel sprays into the front end that pipe 6 is arranged on premixer 8 with First air chamber 7.First air chamber 7 is looped around
Vaporized fuel sprays into the end periphery of pipe 6, and the First air of First air chamber 7 is provided by blower fan 5.
Vaporized fuel after evaporator 3 heats sprays into pipe 6 into staged combustion device 4 by vaporized fuel.First air leads to
The First air chamber 7 that blower fan 5 enters staged combustion device 4 is crossed, the end for spraying into pipe 6 in vaporized fuel with vaporized fuel contacts and portion
Divide and be mixed into premixer 8.Premixer 8 is the ampuliform structure that front end is small, rear end is expanded suddenly, and premixer front end is in bottleneck shape.In order to
Reach well-mixed effect, spinning disk is provided with premixer 8（As shown in Figure 3）, it is anterior that spinning disk is located at premixer 8, is located at
After the premixer front end of bottleneck shape.
One of which technical scheme, the interior spinning disk set in premixer 8 only have one group, are a spinning disk 9.Premixer 8
Through-flow section configuration can be with square or circular, the length of side of the maximum through-flow section in Zhou Kuoduanji premixers or a diameter of D0.Institute
A spinning disk 9 is stated including multiple（It is preferred that 3 ~ 5）Blade 17, set in umbrella array.It is front and rear by fuel flow direction, once revolves
Diffusion type is arranged from front to back for flow 9.Diameter projected of the spinning disk 9 on premixer's section is up to D1, D1For 0.4D0~
0.6D0.Air passes through with vaporized fuel in premixer 8 flows through a spinning disk 9, in a spinning disk of umbrella diffusion arrangement
9 shed the lower premix of formula agitation uniformly.
Another preferred scheme is that the through-flow section configuration of the premixer 8 is square or circular, Zhou Kuoduanji premixers
The length of side of maximum through-flow section or a diameter of D0.Two groups of spinning disks are sequentially provided with premixer 8 from front to back, are an eddy flow
Piece 9 and swirl flow piece 10；Spinning disk 9 and swirl flow piece 10 include multiple（It is preferred that 3 ~ 5）Blade 17, it is in
Umbrella array is set.It is front and rear by fuel flow direction, a spinning disk 9 and swirl flow piece 10 are diffusion type umbrella from front to back
Arrangement.Air passes through with vaporized fuel in premixer 8 flows through a spinning disk 9, is mixed in advance in the case where a spinning disk 9 stirs
It is even.But in order to strengthen mixed effect as far as possible, air continues through swirl flow piece 10 with vaporized fuel gaseous mixture, secondary
Spinning disk 10 is mixed thoroughly under stirring.Diameter projected of the spinning disk on the through-flow section in premixer is up to
D1, D1For 0.4D0~0.6D0；Diameter projected of the swirl flow piece on the through-flow section in premixer is up to D2, D2For 0.6D0
~0.8D0.To reach two level mixed effect, the size of swirl flow piece 10 is more than a spinning disk 9, i.e. D2>D1。
The rear end of premixer 8 is connected with flaring room 11, and flaring room 11 is beloid horn-like.Premixer 8 and flaring room
11 junction is provided with igniter 15, and igniter 15 is arranged at the front end inlet of flaring room 11.It is well mixed by premixer 8
The gaseous mixture of vaporized fuel and air is lighted in the ignited device 15 in the porch of flaring room 11 to be started to burn.The divergent structure of flaring room
Condition is provided for the stable burning of gaseous mixture.The postmedian of flaring room 11 is provided with secondary air channel 12, and Secondary Air is from secondary air channel 12
Tangentially enter flaring room postmedian, maintain the stable burning of vaporized fuel.
In preferred scheme, the end of flaring room 11 is provided with heat storage 13, and heat storage 13 is cellular structure of refractory,
The heat-accumulation combustion of vaporized fuel is formed in flaring room end, maintains combustion efficiency to ensure while reducing First air and secondary air flow
Efficiency of combustion, so as to further reduce NOx generations.
Combuster 16 is connected behind flaring room 11, combustion chamber 16 is provided with tertiary-air pipe 14.Tertiary air is from tertiary-air pipe 14
It is tangential to spray into, vaporized fuel and flue gas is fully burnt.
In technology described in the utility model, air sprays into from First air chamber 7, secondary air channel 12 and tertiary-air pipe 14 respectively,
Vaporized fuel is formed fractional combustion inside and outside staged combustion device 4, farthest reduce NOxDischarge.
Claims (9)
- A kind of 1. low boiling fuel-staged combustion device, it is characterised in that：The staged combustion device（4）Sprayed including vaporized fuel Enter pipe（6）, First air chamber（7）, premixer（8）, flaring room（11）And igniter（15）；The vaporized fuel sprays into pipe（6）With First air chamber（7）It is arranged on premixer（8）Front end；The premixer（8）For the ampuliform structure that front end is small, rear end is big, premix Room（8）The interior spinning disk provided with umbrella diffusion arrangement；The flaring room（11）It is connected to premixer（8）Rear end, it is beloid It is horn-like；The igniter（15）It is arranged on flaring room（11）Front end；The flaring room（11）Postmedian is provided with secondary air channel （12）.
- A kind of 2. low boiling fuel-staged combustion device according to claim 1, it is characterised in that：The premixer（8） Through-flow section configuration is square or circular；The premixer（8）One group of spinning disk is inside provided with, is a spinning disk（9）, once revolve Flow（9）Spread and arrange in umbrella；The premixer（8）The length of side of maximum through-flow section or a diameter of D0, an eddy flow Piece（9）In premixer（8）Diameter projected on through-flow section is up to D1, D1For 0.4D0~0.6D0。
- A kind of 3. low boiling fuel-staged combustion device according to claim 1, it is characterised in that：The premixer（8） Through-flow section configuration is square or circular；The premixer（8）The rotation of two groups of umbrella diffusion arrangements is inside sequentially provided with from front to back Flow, it is a spinning disk（9）With swirl flow piece（10）；The premixer（8）The length of side or a diameter of of maximum through-flow section D0, a spinning disk（9）In premixer（8）Diameter projected on through-flow section is up to D1, D1For 0.4D0~0.6D0；Institute State swirl flow piece（10）In premixer（8）Diameter projected on through-flow section is up to D2, D2For 0.6D0~0.8D0。
- A kind of 4. low boiling fuel-staged combustion device according to claim 1, it is characterised in that：The flaring room（11） End is provided with heat storage（13）.
- A kind of 5. low boiling fuel-staged combustion device according to claim 1, it is characterised in that：The flaring room（11） After connect combuster（16）, combustion chamber（16）It is provided with tertiary-air pipe（14）.
- A kind of 6. low boiling fuel-staged combustion system, it is characterised in that：It is included as described in any one of claims 1 to 3 Low boiling fuel-staged combustion device（4）, and fuel reservoir（1）, petrolift（2）, evaporator（3）And blower fan（5）；WhereinThe fuel reservoir（1）Low boiling fuel for storing liquid；The petrolift（2）By fuel reservoir（1）In low boiling fuel lifting arrive evaporator（3）, the evaporator（3）For Low boiling fuel is heated into vaporized fuel from liquid；Vaporized fuel is sprayed into by vaporized fuel and managed（6）Into staged combustion device（4）Front portion；First air passes through blower fan（5） Into staged combustion device（4）First air chamber（7）, spray into and manage in vaporized fuel with vaporized fuel（6）End contact enter Premixer（8）Premixed；Gaseous mixture after premix enters and premixer（8）Connected flaring room（11）, it is arranged on flaring room（11）The point of front end Firearm（15）Light, and in flaring room（11）In gradual diffusion combustion；Secondary Air is from secondary air channel（12）Into flaring room（11）Postmedian, make vaporized fuel burning more abundant.
- A kind of 7. low boiling fuel-staged combustion system according to claim 6, it is characterised in that：The First air is with vaporized fuel in premixer（8）Interior process flows through a spinning disk（9）, the one of umbrella diffusion arrangement Secondary spinning disk（9）Shed lower turn into of agitation and premix uniform gaseous mixture；Or, the First air and vaporized fuel are in premixer（8）Interior process flows through a spinning disk（9）, spread and arrange in umbrella A spinning disk（9）Shed the lower premix of agitation；Swirl flow piece（10）It is located at a spinning disk（9）Rear, swirl flow piece （10）Diameter projected D2More than one time spinning disk（9）Diameter projected D1, First air and vaporized fuel pass through a spinning disk（9）In advance Swirl flow piece is continued through after mixed（10）Agitation is shed again is mixed into uniform gaseous mixture.
- A kind of 8. low boiling fuel-staged combustion system according to claim 6 or 7, it is characterised in that：The flaring room （11）End is provided with heat storage（13）, from secondary air channel（12）Tangentially enter flaring room（11）The Secondary Air of postmedian is to burning Premix mixed Daqu is combustion-supporting, and the gaseous mixture of burning, which enters, is provided with heat storage（13）Flaring room（11）End, at flaring room end End forms the heat-accumulation combustion of vaporized fuel, reduces First air and secondary air flow.
- A kind of 9. low boiling fuel-staged combustion system according to claim 6 or 7, it is characterised in that：The flaring room （11）After connect combuster（16）, combustion chamber（16）It is provided with tertiary-air pipe（14）, the flaring room（11）Uncombusted is mixed Close gas and flue gas enters combustion chamber（16）, from tertiary-air pipe（14）The combustion-supporting lower fully burning of tertiary air tangentially sprayed into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720572540.6U CN206803143U (en) | 2017-05-22 | 2017-05-22 | A kind of low boiling fuel-staged combustion device and its system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720572540.6U CN206803143U (en) | 2017-05-22 | 2017-05-22 | A kind of low boiling fuel-staged combustion device and its system |
Publications (1)
| Publication Number | Publication Date |
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| CN206803143U true CN206803143U (en) | 2017-12-26 |
Family
ID=60741718
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720572540.6U Withdrawn - After Issue CN206803143U (en) | 2017-05-22 | 2017-05-22 | A kind of low boiling fuel-staged combustion device and its system |
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| Country | Link |
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| CN (1) | CN206803143U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062212A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel-staged combustion device and its system |
| CN108800111A (en) * | 2018-05-15 | 2018-11-13 | 许昌龙岗发电有限责任公司 | A kind of energy-efficient low nitrogen combustion apparatus of boiler |
-
2017
- 2017-05-22 CN CN201720572540.6U patent/CN206803143U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062212A (en) * | 2017-05-22 | 2017-08-18 | 北京醇能科技有限公司 | A kind of low boiling fuel-staged combustion device and its system |
| CN107062212B (en) * | 2017-05-22 | 2023-11-07 | 北京醇能科技有限公司 | Low boiling point fuel staged combustion device and system thereof |
| CN108800111A (en) * | 2018-05-15 | 2018-11-13 | 许昌龙岗发电有限责任公司 | A kind of energy-efficient low nitrogen combustion apparatus of boiler |
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Granted publication date: 20171226 Effective date of abandoning: 20231107 |
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| AV01 | Patent right actively abandoned |
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