CN110454780A - A kind of low heat value gas combustion burner - Google Patents
A kind of low heat value gas combustion burner Download PDFInfo
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- CN110454780A CN110454780A CN201910663732.1A CN201910663732A CN110454780A CN 110454780 A CN110454780 A CN 110454780A CN 201910663732 A CN201910663732 A CN 201910663732A CN 110454780 A CN110454780 A CN 110454780A
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- chamber
- low heat
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 87
- 239000007789 gas Substances 0.000 claims abstract description 35
- 239000000567 combustion gas Substances 0.000 claims abstract description 30
- 239000002737 fuel gas Substances 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 101100408455 Arabidopsis thaliana PLC7 gene Proteins 0.000 description 16
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/60—Devices for simultaneous control of gas and combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
- F23D14/725—Protection against flame failure by using flame detection devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2207/00—Ignition devices associated with burner
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention discloses a kind of low heat value gas combustion burner, including rack, premixer, combustion chamber, burner nozzle, PLC, vortex chamber, gas-distributing fan, flap valve, electronic impulse ignition apparatus；Venturi meter includes the pressure difference transmitter that the amount signal parameter of combustion gas is electrically connected and provided for PLC with PLC；Gas-distributing fan is connected with the air inlet of vortex chamber, and gas-distributing fan, which is electrically connected by frequency converter and PLC and is controlled it by PLC, controls revolving speed, matches air for fuel gas buring；Combustion chamber tail end, which is equipped with, sees fire tube road, which passes through vortex chamber and stretch out from the tail end of vortex chamber.It sees fire tube road tail end and is equipped with the flame sensing electric eye being electrically connected with PLC, see fire tube road tail end and be equipped with flame-observing mirror.Advantage: have structure simple, scientific, compact；It is controlled using PLC, according to gas flow come scientific matching combustion gas and air, gas-distributing fan can accurately adjust air volume in the case where gas flow fluctuates, keep fuel gas buring abundant, and stability is high.
Description
Technical field
The present invention relates to a kind of kitchen range, in particular to one kind is with the matched low heat value gas combustion burner of biomass gasifying furnace.
Background technique
Belong to fuel gas with low heat value with the combustion gas that biomass gasifying furnace generates, during industrial application, there are ignition difficulties,
Steady fire is poor, and burner nozzle is easy de- fire.Applicant in 2016-06-11 be the applying date application, number of patent application be
2016104016296, patent name is the patent of invention of " a kind of low-caloricity gas burner ", the low heat value gas combustion burner
Including the pre- of combustion chamber, gas-distributing fan and burner nozzle, fuel gas inlet, air inlet, pulse igniter and hollow cylinder structure
Mixed room, combustion chamber are hollow structure, and burner nozzle is set to the head of combustion chamber, and air inlet is connected with gas-distributing fan；Hollow cylinder
The premixer of structure, combustion chamber are set in premixer, fuel gas inlet and air inlet difference premixer bottom along a tangential direction with
The tangent setting in premixer, combustor tail are equipped with the fire power regulator of connection premixer；Fire power regulator includes being set to combustion
The restriction of the truncated cone of room tail end and the throttling cover of conical structure are burnt, throttling cover can be socketed in restriction tail end；Section
It flows cover tail end and is equipped with the adjusting screw rod for adjusting throttling cover and combustion chamber gap, adjusting screw rod tail end is equipped with adjusting handle.To solve
Steady fire difference of having determined and the low technical problem of flame combustion temperature.But there are technologies below to ask under the usage scenario of gasification furnace
Topic, due to fire power regulator be manually, gas flow fluctuation in the case where, as burning air volumematching gas-distributing fan without
Method carries out accurate adjustment air volume in real time.Moreover, because pulse igniter is also to manually control, cannot to flame reality
When monitor come timely automated opening pulse igniter rekindle combustion gas；Such as sometimes due to the of short duration supply of combustion gas is discontinuous,
Dead fire is caused, and continuous burning can not be continued, causes combustion gas evolution waste.
Summary of the invention
To solve existing low heat value gas combustion burner there are drawbacks described above, the present invention provides a kind of scientific structure, and design is closed
Manage excellent, convenient, the high low heat value gas combustion burner of abundant temperature of burning of lighting a fire.
To achieve the above object, the scheme that the present invention takes is: a kind of low heat value gas combustion burner, comprising:
Rack,
Premixer, being sufficiently mixed as combustion gas and air, premixer is set on the rack, be a centre inside premixer is round
Column construction, both ends are the cavity for tilting closing in pyramidal structure；
Combustion chamber, the combustion space as combustion gas, combustion chamber are set to inside premixer, and combustion chamber is that a centre is cylindrical
Structure, both ends are to tilt the cavity body of closing in pyramidal structure；It premixes and forms a corrugated between chamber outer wall and Inner Wall of Combustion Chamber
Premix separate space, the front end of the chamber front end portion and premixer is tightly connected, will the closing of premix separate space front end；Combustion chamber
Front end wall portion is to backflow wall, and the wall that backflows is equipped with several connection combustion chambers and premixes the return holes of separate space, and return hole is perpendicular to returning
Flow wall setting；
Burner nozzle, burner nozzle are set to the head of combustion chamber, the outlet as combustion flame；
It is characterized in that, further includes:
PLC, the controller as low heat value gas combustion burner；
Vortex chamber, inside have the cylindrical cavity of a back-end closure, front opening, the tail end of at front opening and premixer
Connection, tangent position of the premixer in different directions are respectively equipped with fuel gas inlet and air inlet, the rotation as combustion gas and air
Turn mixing place；
Gas-distributing fan is connected with the air inlet of vortex chamber, and gas-distributing fan includes frequency converter, and gas-distributing fan is electrically connected by frequency converter with PLC
It connects and is controlled it by PLC and control revolving speed, match air for fuel gas buring；
The fuel gas inlet of Venturi meter, including pressure difference transmitter and Venturi tube, Venturi tube rear end and vortex chamber connects,
Pressure difference transmitter and PLC are electrically connected and provide the amount signal parameter of combustion gas for PLC；
Flap valve is located at the front end of the Venturi tube of Venturi meter, the valve as burnt gas switch；
Electronic impulse ignition apparatus is set at burner nozzle, is electrically connected with PLC and is controlled its igniting by PLC, as combustion gas
Firing tools.
The explanation of PLC as above scheme, the pressure difference transmitter of Venturi tube are converted to corresponding according to the size of pressure difference
Curent change, signal is sent to PLC, PLC is according to flow signal size, to the control signal of frequency converter corresponding frequencies, frequency conversion
Device to gas-distributing fan carry out revolving speed adjustment, thus realize with air quantity follow combustion gas flow variation and Matching and modification.Work as flap valve
When opening, PLC senses the flame conditions that electric eye detects combustion chamber according to flame, and control electronic impulse ignition apparatus plays on or off
It closes.
As an improvement of the above scheme, previous combustion room tail end, which is equipped with, sees fire tube road, which passes through vortex chamber simultaneously
It is stretched out from the tail end of vortex chamber.
As an improvement of the above scheme, aforementioned sight fire tube road tail end is equipped with flame and senses electric eye, and flame senses electric eye and PLC
Electrical connection, the flame sensor as combustion chamber.
As an improvement of the above scheme, aforementioned sight fire tube road tail end is equipped with flame-observing mirror.
As a further illustration of the above scheme, both aforementioned fuel gas inlet and air inlet are arranged in a staggered manner, fuel gas inlet is set
The upper right Angle Position in vortex chamber is set, the lower-left Angle Position of vortex chamber is arranged in air inlet.
As a preferred embodiment of the above solution, preferably, the horizontal axis angle of aforementioned return hole and combustion chamber is 20 degree to 60
Degree.
Preferably, the aforementioned wall that backflows with a thickness of 30mm ~ 50mm.
Working principle explanation, combustion gas enters vortex chamber through flap valve and Venturi meter, from tangent line, in the control of PLC
Under, the air of combustion gas and gas-distributing fan generates the mixed gas of rotational flow in premix separate space, enters in combustion chamber from return hole
Rotary combustion forms thermal-flame, finally ejects from burner nozzle.
Vortex chamber is increased on the basis of existing technology, is eliminated the firepower in the prior art manually adjusted and is adjusted dress
Set, with PLC(programmable controller) and the combination of frequency converter and Venturi meter realize that dynamic air distribution is adjusted.Pass through
PLC can set corresponding control program and can solve the existing of low heat value gas combustion burner in conjunction with the technical solution of the application
In technology gas-distributing fan accurate adjustment air volume in real time can not be carried out according to the flowed fluctuation of combustion gas and lack flame and
The technical issues of real time monitoring can not open pulse igniter in time.
The present invention mainly has the advantage that simple with structure, scientific, compact；It is controlled using PLC, according to gas flow
Come scientific matching combustion gas and air, gas-distributing fan can accurately adjust air volume in the case where gas flow fluctuates in real time, make
Fuel gas buring is abundant, and stability is high；The monitoring to flame is increased, while realizing more reasonable ignition control mode, is avoided a little
Fire not in time caused by combustion gas waste.
Detailed description of the invention
Fig. 1 is the system structure diagram of low heat value gas combustion burner of the invention, and arrow indicates airflow direction in figure.
Drawing reference numeral explanation: 1- rack, the premixer 2-, the combustion chamber 3-, 4- flap valve, 5- gas-distributing fan, the spray of 6- burner
Mouthful, 7- PLC, 8- vortex chamber, 9- Venturi meter, 10- electronic impulse ignition apparatus, 31- premixes separate space, and 32- backflows wall,
33- return hole, 35- see fire tube road, 36- flame sense electric eye, 37- flame-observing mirror, 51- frequency converter, 81- fuel gas inlet, 82- into
Air port, 91- Venturi tube, 92- pressure difference transmitter.
Specific embodiment
With reference to the accompanying drawing and preferred embodiment, the present invention and its advantageous effects are carried out further specifically
It is bright.
Referring to Fig. 1, a kind of low heat value gas combustion burner includes:
Rack 1,
Premixer 2, being sufficiently mixed as combustion gas and air, premixer 2 is located in rack 1, is a centre inside premixer 2
It is the cavity for tilting closing in pyramidal structure for cylindrical structure, both ends；
Combustion chamber 3, the combustion space as combustion gas, combustion chamber 3 are set to inside premixer 2, and combustion chamber 3 is that a centre is round
Column construction, both ends are the cavity body for tilting closing in pyramidal structure；One is formed between 3 inner wall of 2 outer wall of premixer and combustion chamber
The front end of the premix separate space 31 of corrugated, 3 front end of combustion chamber and premixer 2 is tightly connected, and will premix 31 front end of separate space
Closing；The front end wall portion of combustion chamber 3 is the wall 32 that backflows, and the wall 32 that backflows is equipped with several connection combustion chambers 3 and premixes separate space 31
Return hole 33, return hole 33 are arranged perpendicular to the wall 32 that backflows；
Burner nozzle 6, burner nozzle 6 are set to the head of combustion chamber 3, the outlet as combustion flame；
PLC7, the controller as low heat value gas combustion burner；
Vortex chamber 8, inside have the cylindrical cavity of a back-end closure, front opening, at front opening with the tail of premixer 2
End connection, tangent position of the premixer 2 in different directions is respectively equipped with fuel gas inlet 81 and air inlet 82, as combustion gas and sky
The rotation mixing place of gas；
Gas-distributing fan 5 is connected with the air inlet 82 of vortex chamber 8, gas-distributing fan 5 include frequency converter 51, gas-distributing fan 5 by frequency converter 51 with
PLC7 electrical connection is simultaneously controlled its control revolving speed by PLC7, matches air for fuel gas buring；
Venturi meter 9, including pressure difference transmitter 92 and Venturi tube 91, the combustion gas of Venturi tube 91 rear end and vortex chamber 8
Import 81 connects, and pressure difference transmitter 92 and PLC7 are electrically connected and provide the amount signal parameter of combustion gas for PLC7；
Flap valve 4 is located at the front end of the Venturi tube 91 of Venturi meter 9, the valve as burnt gas switch；
Electronic impulse ignition apparatus 10 is set at burner nozzle 6, is electrically connected with PLC7 and is controlled its igniting by PLC7, as
The firing tools of combustion gas.
Wherein, the combustion case of combustion chamber 3 is observed for convenience, and 3 tail end of combustion chamber, which is equipped with, sees fire tube road 35, the sight fire tube
Road 35 passes through vortex chamber 8 and stretches out from the tail end of vortex chamber 8.
The burning signal of combustion chamber 3 is obtained in order to facilitate PLC7, is seen 35 tail end of fire tube road and is equipped with flame sensing electric eye 36, fire
Flame senses electric eye 36 and PLC7 is electrically connected, the flame sensor as combustion chamber 3.
The combustion case for observing combustion chamber 3 from the outside for convenience sees 35 tail end of fire tube road and is equipped with flame-observing mirror 37.
Observe the combustion case of combustion chamber 3 from the outside for convenience, both fuel gas inlet 81 and air inlet 82 are arranged in a staggered manner,
The upper right Angle Position of vortex chamber 8 is arranged in fuel gas inlet 81, and the lower-left Angle Position of vortex chamber 8 is arranged in air inlet 82.
In order to improve the stability of flame combustion, return hole 33 and the horizontal axis angle of combustion chamber 3 are 20 degree to 60 degree.
When entering rotary combustion in combustion chamber 3 for mixed gas, suitable choked flow is generated in the wall 32 that backflows, is backflowed
Wall 32 with a thickness of 30mm ~ 50mm.
In addition, the valve opening and closing of flap valve 4 is controlled by cylinder or oil cylinder.
About the explanation of Venturi meter 9 used in this application, Venturi meter 9 used in this application is poor
Pressure type flow measuring instrument is mainly used for measuring the flow of single-phase stable fluid in closed conduct, is usually used in measuring air, natural
Gas, coal gas, water or other fluid flow.Its fundamental measurement principle is with law of conservation of energy -- bernoulli equation and flowing continuity
Flow-measuring method based on equation.
Course of work explanation, low heat value gas combustion burner and after being connected with gasification furnace, the low heat value combustion that gasification furnace generates
Gas enters from 8 tangent line of vortex chamber of burner rear end, then and matches by flap valve 4 and Venturi meter 9 in conveyance conduit
Premix separate space 31 of the air of blower 5 together in burner periphery generates rotational flow and forms mixed gas, using return hole
33 enter rotary combustion in combustion chamber 3, and under the choked flow effect for the wall 32 that backflows, the temperature of burning guarantees subsequent steady air current
Burning forms thermal-flame, finally ejects by burner nozzle 6.During combustion gas and matched air, venturi
The pressure difference transmitter 92 of pipe 91 is converted to corresponding curent change according to the size of pressure difference, and signal is sent to PLC7, PLC7 according to
Flow signal size, to the control signal of 51 corresponding frequencies of frequency converter, frequency converter 51 carries out revolving speed adjustment to gas-distributing fan 5, thus
Realize with air quantity follow combustion gas flow variation and Matching and modification.
The ignition procedure of electronic impulse ignition apparatus 10 is as follows: when flap valve 4 is opened, PLC7 controls electronic impulse ignition apparatus
Signal after flame sensing electric eye 36 detects the flame of combustion chamber 3, is fed back to PLC7, PLC7 is closing electronics arteries and veins by 10 igniting
It rushes igniter 10 and signal is fed back into PLC7, PLC7 is being controlled when flame sensing electric eye 36 detects that the flame of combustion chamber 3 is broken
Electronic impulse ignition apparatus 10 processed is opened.
Book and specific embodiment do not limit the present invention in any way according to the above description, and the invention is not limited to upper
Face is disclosed and the specific embodiment of description, to some modification and variation of the invention, it should also fall into right of the invention and want
In the protection scope asked.
Claims (7)
1. a kind of low heat value gas combustion burner, comprising:
Rack,
Premixer, being sufficiently mixed as combustion gas and air, premixer is set on the rack, be a centre inside premixer is round
Column construction, both ends are the cavity for tilting closing in pyramidal structure；
Combustion chamber, the combustion space as combustion gas, combustion chamber are set to inside premixer, and combustion chamber is that a centre is cylindrical
Structure, both ends are to tilt the cavity body of closing in pyramidal structure；It premixes and forms a corrugated between chamber outer wall and Inner Wall of Combustion Chamber
Premix separate space, the front end of the chamber front end portion and premixer is tightly connected, will the closing of premix separate space front end；Combustion chamber
Front end wall portion is to backflow wall, and the wall that backflows is equipped with several connection combustion chambers and premixes the return holes of separate space, and return hole is perpendicular to returning
Flow wall setting；
Burner nozzle, burner nozzle are set to the head of combustion chamber, the outlet as combustion flame；
It is characterized in that, further includes:
PLC, the controller as low heat value gas combustion burner；
Vortex chamber, inside have the cylindrical cavity of a back-end closure, front opening, the tail end of at front opening and premixer
Connection, tangent position of the premixer in different directions are respectively equipped with fuel gas inlet and air inlet, the rotation as combustion gas and air
Turn mixing place；
Gas-distributing fan is connected with the air inlet of vortex chamber, and gas-distributing fan includes frequency converter, and gas-distributing fan is electrically connected by frequency converter with PLC
It connects and is controlled it by PLC and control revolving speed, match air for fuel gas buring；
The fuel gas inlet of Venturi meter, including pressure difference transmitter and Venturi tube, Venturi tube rear end and vortex chamber connects,
Pressure difference transmitter and PLC are electrically connected and provide the amount signal parameter of combustion gas for PLC；
Flap valve is located at the front end of the Venturi tube of Venturi meter, the valve as burnt gas switch；
Electronic impulse ignition apparatus is set at burner nozzle, is electrically connected with PLC and is controlled its igniting by PLC, as combustion gas
Firing tools.
2. low heat value gas combustion burner as described in claim 1, it is characterized in that: the combustion chamber tail end, which is equipped with, sees fire tube road,
The sight fire tube road passes through vortex chamber and stretches out from the tail end of vortex chamber.
3. low heat value gas combustion burner as claimed in claim 2, it is characterized in that: the sight fire tube road tail end is sensed equipped with flame
Electric eye, flame senses electric eye and PLC is electrically connected, the flame sensor as combustion chamber.
4. low heat value gas combustion burner as claimed in claim 2 or claim 3, it is characterized in that: the sight fire tube road tail end, which is equipped with, sees fire
Mirror.
5. low heat value gas combustion burner as claimed in claim 4, it is characterized in that: both the fuel gas inlet and air inlet are staggered
The upper right Angle Position of vortex chamber is arranged in setting, fuel gas inlet, and the lower-left Angle Position of vortex chamber is arranged in air inlet.
6. low heat value gas combustion burner as claimed in claim 5, it is characterized in that: the horizontal axis of the return hole and combustion chamber
Angle is 20 degree to 60 degree.
7. low heat value gas combustion burner as claimed in claim 6, it is characterized in that: the wall that backflows with a thickness of 30mm ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663732.1A CN110454780A (en) | 2019-07-23 | 2019-07-23 | A kind of low heat value gas combustion burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663732.1A CN110454780A (en) | 2019-07-23 | 2019-07-23 | A kind of low heat value gas combustion burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110454780A true CN110454780A (en) | 2019-11-15 |
Family
ID=68483070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910663732.1A Withdrawn CN110454780A (en) | 2019-07-23 | 2019-07-23 | A kind of low heat value gas combustion burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110454780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097257A (en) * | 2020-10-14 | 2020-12-18 | 合肥顺昌分布式能源综合应用技术有限公司 | Premixing device before gas of gas kitchen range |
-
2019
- 2019-07-23 CN CN201910663732.1A patent/CN110454780A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097257A (en) * | 2020-10-14 | 2020-12-18 | 合肥顺昌分布式能源综合应用技术有限公司 | Premixing device before gas of gas kitchen range |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191115 |
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| WW01 | Invention patent application withdrawn after publication |