CN211625237U - Burner with high-low pressure, high-low heat value double fuel gas - Google Patents
Burner with high-low pressure, high-low heat value double fuel gas Download PDFInfo
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- CN211625237U CN211625237U CN201922088252.5U CN201922088252U CN211625237U CN 211625237 U CN211625237 U CN 211625237U CN 201922088252 U CN201922088252 U CN 201922088252U CN 211625237 U CN211625237 U CN 211625237U
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Abstract
The utility model discloses a combustor of high-low pressure, high-low calorific value dual fuel gas, including barrel and bottom plate, fixed mounting has the first fuel chamber on the bottom plate, is provided with a plurality of first gas gun pipes on the first fuel chamber, and first fuel chamber middle part is provided with circular through-hole, and the bottom plate has stabilized ignition through the welded fastening, and stabilized ignition passes the circular through-hole in first fuel chamber, and the barrel outside fixed mounting has second fuel ring pipe, is provided with a plurality of connecting pipes on the second fuel ring pipe, and connecting pipe one end is connected with the fixed plate; the utility model discloses the top sets up to multi-level step pagoda formula structure fire pan brick, makes the furnace flue gas form powerful flue gas backward flow, and high pressure gas rifle has controlled the local concentration of combustor flame at the staged combustion of fire pan brick formation fuel to reduced the flame height, low pressure gas rifle top is equipped with the spinning disk, is equipped with the automatic ignition system among the stable ignition device, can reduce NOx and CO production.
Description
Technical Field
The utility model relates to a petrochemical, metallurgy, industrial kiln combustor technical field particularly, relates to an ultralow NOx, CO emission combustor of two fuel gases of high-low pressure, high low calorific value.
Background
At present, various high-pressure and high-calorific-value fuel gases and various low-pressure and low-calorific-value fuel gases: such as: most of natural gas, liquefied gas, coke oven gas, blast furnace gas, converter gas, biogas, biomass gas, catalytic dry gas, self-generated dry gas, various self-generated tail gases and the like are waste gases produced by large-scale industrial mechanisms, the technology for treating the waste gases is not mature, and the conventional burner cannot completely burn various industrial waste gases with high and low pressure and high and low calorific values.
The burner is the core part of the heating furnace, because the regulations 2015-07-01 of the emission Standard of pollutants for the Petroleum refining industry (GB 31570 one for one's meal) issued by the State environmental protection administration begin to implement, higher requirements are put forward on the emission of flue gas, most of the burners of the heating furnace device are upgraded and modified into low NOx burners, and the low NOx burners have certain limitation on fuel gas and can only burn fuel gas above 0.02MPa, so that a large part of low-pressure fuel tail gas in the petrochemical industry, the metallurgical industry, the industrial kiln and the like is burnt by a high-fire-column white-emission burner, the energy is wasted, and the burning of low-pressure fuel tail gas is difficult to meet the environmental protection requirements.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides an ultralow NOx of high-low pressure, the two fuel gas of high low calorific value, CO discharge combustor, applicable in the requirement of burning ultralow NOx, the CO of the two fuel gas of various high-low pressure, high low calorific value, the environmental protection of festival source.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
the utility model provides an ultralow NOx of high-low pressure, high low heat value dual fuel gas, CO discharge combustor, includes barrel and bottom plate, fixed mounting has first fuel chamber on the bottom plate, be provided with a plurality of first gas gun pipes on the first fuel chamber, first fuel chamber middle part is provided with circular through-hole, the bottom plate has stable ignition through welded fastening, stable ignition passes the circular through-hole in first fuel chamber, barrel outside fixed mounting has second fuel ring pipe, be provided with a plurality of connecting pipes on the second fuel ring pipe, connecting pipe one end is connected with the fixed plate, the fixed plate passes through bolted connection on the bottom plate, the connecting pipe is connected with second fuel gun, second fuel gun is responsible for and passes the bottom plate, the barrel top has the fire basin brick through the fixed cover fixed mounting of fire basin brick, second fuel gun is responsible for top fixed mounting in the fire basin brick outside, and a second fuel gas gun branch pipe connected with the second fuel gas gun main pipe is arranged on the inner side of the fire basin brick.
Furthermore, the inner wall of the barrel is provided with 50-80 mm of aluminum silicate fiber cotton, the bottom plate is provided with a fire observation hole, one side of the barrel is provided with an air adjusting opening, the other side of the barrel is fixedly provided with a fire detection assembly, and the barrel is fixedly connected with the bottom plate through bolts.
Further, an air inlet pipe is connected to the bottom of the first fuel cavity, and a first fuel air inlet is formed in the tail end of the air inlet pipe.
Further, 8 first gas gun pipes are arranged on the first fuel cavity.
Further, a second fuel inlet is arranged on the second fuel annular pipe.
Further, 10 second gas gun main pipes are arranged on the second fuel annular pipe.
Further, the bottom of the stable ignition device is provided with an ignition electrode connector, the top of the stable ignition device is provided with a flame stabilizing cover, the outer side of the stable ignition device is provided with an air inlet, the ignition electrode connector is connected with an ignition gun, the air inlet is connected with an ignition rod, and the ignition gun is fixed with the top of the ignition rod through a stabilizer.
Furthermore, a swirler is fixedly arranged in the cylinder.
Further, the fire basin brick is of a multi-level step tower type structure, and a plurality of communicated round holes are uniformly arranged on the side face of the fire basin brick upwards.
The utility model has the advantages that: the utility model discloses the top sets up to multi-level step pagoda structure fire pan brick, can make the furnace flue gas form powerful flue gas backward flow, high pressure gas rifle forms the staged combustion of fuel at the fire pan brick, the local concentration of burner flame has been controlled, realize the mistake dense of fuel, the light burning of mistake, and the flame height has been reduced, low pressure gas rifle top all has the spinning disk, be equipped with automatic ignition system among the stable ignition device, automatic flame monitoring system, automatic purging system, automatic cutout interlocking system, guarantee heating furnace and combustor safe and reliable operation, reach fuel and air classification, fuel and the hierarchical effect of fuel, reduce the production of NOx and CO.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a high and low pressure, high and low heating value dual fuel gas ultra low NOx, CO emission combustor in accordance with an embodiment of the present invention;
FIG. 2 is a bottom view of an ultra-low NOx, CO emission burner for high and low pressure, high and low heating value dual fuel gases in accordance with an embodiment of the present invention;
FIG. 3 is a top view of an ultra-low NOx, CO emission burner for high and low pressure, high and low heating value dual fuel gases in accordance with an embodiment of the present invention;
FIG. 4 is a front view of a second fuel gas gun according to an embodiment of the present invention;
FIG. 5 is a bottom view of a second gas gun according to an embodiment of the present invention;
FIG. 6 is a front view of a first gas gun according to an embodiment of the present invention;
FIG. 7 is a top view of a first gas gun according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a stable ignition device according to an embodiment of the present invention;
fig. 9 is a partial enlarged view of a stable ignition device according to an embodiment of the present invention;
FIG. 10 is a front view of a cyclone according to an embodiment of the present invention;
FIG. 11 is a top view of a swirler in accordance with an embodiment of the present invention;
FIG. 12 is a front view of a fire pan brick according to an embodiment of the present invention;
fig. 13 is a top view of a fire pan brick according to an embodiment of the present invention.
In the figure:
1. a fire pan brick; 2. a swirler; 3. a barrel; 4. a fire detection assembly; 5. stabilizing the ignition device; 5-1, gas inlet; 5-2, an ignition electrode joint; 5-3, an ignition gun; 5-4, an ignition rod; 5-5, a stabilizer; 5-6, a flame stabilizing cover; 6. a first gas gun; 6-1, a first gas pipe; 6-2, a first fuel cavity; 7. a fire observation hole; 8. a base plate; 9. a second gas gun; 9-1, a second gas gun main pipe; 9-2, a second gas gun branch pipe; 9-3, fixing plates; 9-4, connecting pipes; 9-5, a second fuel annular tube; 10. adjusting the air outlet; 11. a first fuel intake port; 12. a second fuel intake port.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
As shown in fig. 1-3, according to the embodiment of the present invention, the ultra-low NOx and CO emission burner of dual fuel gas with high and low pressure and high and low calorific value comprises a barrel 3 and a bottom plate 8, a first fuel chamber 6-2 is fixedly installed on the bottom plate 8, a plurality of first gas gun tubes 6-1 are disposed on the first fuel chamber 6-2, a circular through hole is disposed in the middle of the first fuel chamber 6-2, a stable ignition device 5 is fixed on the bottom plate 8 by welding, the stable ignition device 5 passes through the circular through hole of the first fuel chamber 6-2, a second fuel annular tube 9-5 is fixedly installed on the outer side of the barrel 3, a plurality of connecting tubes 9-4 are disposed on the second fuel annular tube 9-5, one end of the connecting tube 9-4 is connected with a fixing plate 9-3, the fixing plate 9-3 is connected to the bottom plate 8 through bolts, the connecting pipe 9-4 is connected with a second fuel gas gun main pipe 9-1, the second fuel gas gun main pipe 9-1 penetrates through the bottom plate 8, the top of the cylinder 3 is fixedly provided with a fire pan brick 1 through a fire pan brick fixing sleeve, the top of the second fuel gas gun main pipe 9-1 is fixedly arranged on the outer side of the fire pan brick 1, and a second fuel gas gun branch pipe 9-2 connected to the second fuel gas gun main pipe 9-1 is arranged on the inner side of the fire pan brick 1.
In a specific embodiment of the utility model, the 3 inner walls of barrel are provided with 50mm ~ 80 mm's aluminium silicate cellucotton, be provided with observation hole 7 on the bottom plate 8, barrel 3 one side is provided with accent wind gap 10, 3 opposite side fixed mounting of barrel has the fire to examine subassembly 4, barrel 3 with bottom plate 8 passes through bolt fixed connection.
In an embodiment of the present invention, an air inlet pipe is connected to the bottom of the first fuel chamber 6-2, and the end of the air inlet pipe is provided with a first fuel inlet 11.
In an embodiment of the present invention, 8 first gas barrels 6-1 are disposed on the first fuel chamber 6-2.
In a specific embodiment of the present invention, a second fuel inlet 12 is provided on the second fuel annular pipe 9-5.
In one embodiment of the present invention, 10 second fuel lance main pipes 9-1 are disposed on the second fuel annular pipe 9-5.
As shown in fig. 8-9, in a specific embodiment of the present invention, an ignition electrode connector 5-2 is installed at the bottom of the stable ignition device 5, a flame stabilizing cover 5-6 is installed at the top of the stable ignition device 5, an air inlet 5-1 is installed at the outer side of the stable ignition device 5, the ignition electrode connector 5-2 is connected with an ignition gun 5-3, the air inlet 5-1 is connected with an ignition rod 5-4, and the ignition gun 5-3 is fixed with the top of the ignition rod 5-4 through a stabilizer 5-5.
In a specific embodiment of the present invention, a cyclone 2 is fixedly installed in the cylinder 3.
In a specific embodiment of the utility model, the brazier brick 1 is multi-level step pagoda formula structure, the round hole that is provided with a plurality of intercommunications evenly up is followed to brazier brick 1 side.
In a specific embodiment of the utility model, the brazier brick 1 is multi-level step pagoda formula structure, the round hole that is provided with a plurality of intercommunications evenly up is followed to brazier brick 1 side.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention will be described in detail through specific use modes.
Ultralow NOx, CO of two fuel gases of high-low pressure, high low calorific value discharge combustor mainly comprise fire pan brick 1, swirler 2, barrel 3, stable ignition 5, first gas rifle 6 and second gas rifle 9.
As shown in fig. 4-7, the first gas gun 6 is composed of a first gas pipe 6-1 and a first fuel chamber 6-2, and the second gas gun 9 is composed of a second gas gun main pipe 9-1, a second gas gun branch pipe 9-2, a fixing plate 9-3, a connecting pipe 9-4 and a second fuel annular pipe 9-5.
The first gas gun 6 is a low-pressure gas gun, the second gas gun 9 is a high-pressure gas gun,
as shown in fig. 12-13, the brazier brick 1 is of a multi-level step tower structure, a plurality of communicated circular holes are uniformly distributed on the periphery of the side surface of the brazier brick 1 in an inclined manner, when a high-pressure inner side gas gun sprays, flame is uniformly diffused to each small hole, and stable and uniform annular cylindrical flame is formed, so that stable combustion of the flame is ensured; the outer side surface of the fire basin brick 1 is of a multi-step inclined plane pagoda structure, and a negative pressure area is formed when a high-pressure outer side gas gun sprays high-pressure gas along the inclined plane of the step of the fire basin brick 1, so that the flue gas of a hearth is carried to form strong flue gas backflow, and the generation of NOx is reduced.
As shown in fig. 10-11, the swirler 2 is disposed in the barrel 3, and when air passes through the swirler 2, strong swirling air is formed, so that the gas and the air are more uniformly mixed, and a swirling and flowing flame is formed.
The aluminum silicate fiber cotton with the thickness of 50 mm-80 mm is arranged between the inner walls of the barrel bodies 3, the cyclone 2, the stable ignition device 5, the low-pressure gas gun and the high-pressure gas gun are installed in the barrel bodies 3, the bottom plate 8 and the top plate of the barrel bodies 3 are subjected to finish machining through a numerical control machine tool, so that the inner side high-pressure gas gun and the outer side high-pressure gas gun are guaranteed to be vertical and have no deviation, the bottom plate 8 and the barrel bodies 3 are connected through bolts for convenience in maintenance, and each high-pressure gas gun can be freely drawn out from the barrel body.
The stable ignition device 5 consists of an air inlet 5-1, an ignition electrode connector 5-2, an ignition gun 5-3, an ignition rod 5-4 and an ignition device sleeve, wherein the air inlet 5-1, the ignition electrode connector 5-2, the ignition gun 5-3 and the ignition rod 5-4 are all arranged in the ignition device sleeve, the stable ignition device 5 is arranged in the center of the burner for preventing accidents due to the various fuel gas changes, so that a stable ignition source can be brought, an automatic ignition system, an automatic flame monitoring system, an automatic purging system and an automatic cut-off interlocking system are arranged in the stable ignition device 5, once flame is abnormal, the automatic flame monitoring system can detect and transmit the signal to the automatic cut-off interlocking system at the same time, and the automatic cut-off interlocking system can cut off the fuel gas and close a valve at the same time, after the abnormity is processed, an automatic purging system and an automatic ignition system are carried out; thereby ensuring the safe and reliable operation of the heating furnace and the burner.
Three gas guns are arranged in the barrel 3, namely a high-pressure gas gun inner gun, a high-pressure gas gun outer gun and a low-pressure gas gun, 8-20 high-pressure gas outer guns are uniformly distributed on the outer cavity of the fire basin brick 1, 8-20 high-pressure gas inner guns are correspondingly and uniformly distributed on the inner periphery of the fire basin brick, each high-pressure gas gun is formed by stainless steel pipes and high-temperature-resistant material (Cr 25Ni 20) spray heads of different models according to different heat loads, the high-pressure gas inner gun accounts for 15% -25% of the total high-pressure fuel ratio, the air mixed with the high-pressure gas inner gun accounts for the total amount, primary combustion is carried out under the condition of extremely large excess air amount, the flame temperature is low, the generation amount of NOx is also low, oxygen-enriched dispersed combustion is formed, and the high-pressure gas outer gun accounts for 75% -85% of the total high-; thus, multi-level flames are formed around the outer periphery of the fire pan brick, thereby utilizing the space of the hearth to the maximum extent, enabling the fuel gas to be combusted in the space as large as possible of the whole combustion chamber, enabling the heat load of each part in the hearth to be even, simultaneously reducing the oxygen concentration in the air-flue gas mixture after primary combustion, and enabling the secondary fuel burner to suck the flue gas in the furnace into a combustion area, and reducing the average temperature and the peak temperature of the flames by multiple factors, thereby reducing the emission of NOx, effectively avoiding the generation of carbon monoxide, and being stable and reliable in combustion.
According to different heat loads, a plurality of rings of low-pressure gas guns are arranged, each ring of low-pressure gas guns is provided with 8-20 low-pressure gas guns, each low-pressure gas gun is different in height and staggered, and the top of each low-pressure gas gun is provided with a spinning disk, so that the effects of fuel and air classification and fuel classification are achieved, and the generation of NOx is reduced.
Ultralow NOx, CO of high-low pressure, high low calorific value two fuel gas discharge combustor be applied to industrial boiler burning, be suitable for various high pressure, high calorific value fuel gas or various low pressure, low calorific value fuel gas, various fuel gas can stable burning simultaneously also can separate stable burning alone.
When the stove is used specifically, the fire pan brick is fixedly arranged in the fire pan brick sleeve by using bolts, is connected with the barrel and extends out of the interior of the hearth.
The stable ignition device is fixed in the middle of the barrel and penetrates through the cyclone to extend into the middle of the fire pan brick, the ignition rod joint is connected with the feeding gas pipe, and the air inlet is connected with the air input pipe through the metal hose.
The high-pressure fuel air inlet is connected with the high-pressure air delivery pipe through a metal hose, and the low-pressure fuel air inlet is connected with the low-pressure air delivery pipe through a metal hose.
The high-pressure gas gun inner gun and the high-pressure gas gun outer gun are welded together to form a Y shape, each high-pressure gas gun is fixed on the burner base plate and uniformly penetrates through the swirler assembly to extend into the periphery and the middle of the fire pan brick, and each high-pressure gas gun is connected with the high-pressure fuel pipe through the metal hose.
Each low-pressure gas gun is uniformly distributed and arranged on the low-pressure fuel cavity and welded with the low-pressure fuel cavity, each low-pressure gas gun penetrates through the swirler to enter the fire pan brick, and the low-pressure fuel cavity is welded on the bottom plate of the combustor cylinder body.
Igniting the ignition device, burning the gas sprayed by the ignition device to form swirl stable central flame, providing a fire source required by stable combustion for the whole combustion device, then opening a high-pressure gas valve and an air valve, igniting the inner ring for combustion, forming a plurality of circles of flame in the inner ring of the fire pot brick, and fully mixing the flame of the inner ring with swirl air upwards along the fire pot brick for thick and thin combustion; meanwhile, a small part of flame on the inner ring is blown out from the inclined hole of the fire pan brick to ignite the outer ring gun, and the smoke in the hearth forms a negative pressure area due to the special structure of the steps and the inclined plane of the fire pan brick, so that the internal circulation of the smoke is formed, the gas is fully combusted, the flame in the hearth space of the industrial boiler is effectively utilized as far as possible, the oxygen content of the hearth is diluted, and the generated NOx is very little.
The upper end of the combustor is provided with an FGR circulating flue gas system which comprises a flue, an elbow, a valve, an induced draft fan, a heat preservation layer, an expansion joint, a flange and the like, one end of a flue gas pipeline enters a combustion-supporting air cavity through the middle of the cylinder body, the other end of the flue gas pipeline is connected with the elbow, the valve and the expansion joint and then connected with the induced draft fan, the inlet of the induced draft fan is connected with a smoke pipe of the preheater through the flue, 10-25% of flue gas pumped from the smoke pipe of the preheater enters the combustion-supporting air cavity and is mixed with the combustion-supporting air.
In conclusion, with the help of the above technical scheme of the utility model, air classification has been adopted, fuel classification, oxygen boosting, anaerobic combustion technique, flue gas inner loop technique, multiple spot dispersion combustion technique reduces the temperature of flame center high-temperature region, the regulation ratio is big, operating flexibility is wide, thereby fuel gas classification, the segmentation burning has been realized, fuel burning fully passes through the hierarchical segmentation combustion method of gas completely, effectively utilize the space among the industrial heating furnace to make the flame disperse, through the fire basin brick of installation, form stable annular cylindric flame, reduce flame average temperature and peak temperature, and make it form the flue gas inner loop, increase FGR flue gas recirculation technique simultaneously, reach and restrain NOx and discharge the best effect, thereby realize ultralow NOx, low CO discharges.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A burner of double fuel gases with high and low pressures and high and low calorific values comprises a cylinder body (3) and a bottom plate (8), and is characterized in that a first fuel cavity (6-2) is fixedly installed on the bottom plate (8), a plurality of first fuel gas gun tubes (6-1) are arranged on the first fuel cavity (6-2), a circular through hole is formed in the middle of the first fuel cavity (6-2), a stable ignition device (5) is fixedly welded on the bottom plate (8), the stable ignition device (5) penetrates through the circular through hole of the first fuel cavity (6-2), a second fuel annular tube (9-5) is fixedly installed on the outer side of the cylinder body (3), a plurality of connecting tubes (9-4) are arranged on the second fuel annular tube (9-5), and one end of each connecting tube (9-4) is connected with a fixing plate (9-3), fixed plate (9-3) pass through bolted connection in on bottom plate (8), connecting pipe (9-4) are connected with second gas gun and are responsible for (9-1), second gas gun is responsible for (9-1) and passes bottom plate (8), barrel (3) top has fire basin brick (1) through the fixed cover fixed mounting of fire basin brick, second gas gun is responsible for (9-1) top fixed mounting in the fire basin brick (1) outside, fire basin brick (1) inboard is provided with the connection and is in second gas gun branch pipe (9-2) that second gas gun was responsible for (9-1).
2. The burner of high-low pressure and high-low heat value dual fuel gas as claimed in claim 1, wherein the inner wall of the barrel (3) is provided with 50 mm-80 mm of aluminum silicate cellucotton, the bottom plate (8) is provided with a fire observation hole (7), one side of the barrel (3) is provided with an air adjusting hole (10), the other side of the barrel (3) is fixedly provided with a fire detection assembly (4), and the barrel (3) and the bottom plate (8) are fixedly connected through bolts.
3. The burner of high-low pressure and high-low heat value dual fuel gas as claimed in claim 1, wherein a gas inlet pipe is connected to the bottom of the first fuel cavity (6-2), and a first fuel gas inlet (11) is arranged at the tail end of the gas inlet pipe.
4. A burner of dual fuel gas with high and low pressure and high and low heating value according to claim 3, characterized in that 8 first gas gun tubes (6-1) are arranged on the first fuel chamber (6-2).
5. A burner of dual fuel gas of high and low pressure and high and low calorific value according to claim 1, characterized in that the second fuel annular pipe (9-5) is provided with a second fuel inlet (12).
6. The burner of high-low pressure, high-low heating value dual fuel gas according to claim 5, characterized in that 10 second fuel gas lance main pipes (9-1) are provided on the second fuel annular pipe (9-5).
7. The burner of high-low pressure and high-low heat value dual fuel gas as claimed in claim 1, wherein an ignition electrode connector (5-2) is installed at the bottom of the stable ignition device (5), a flame stabilizing cover (5-6) is arranged at the top of the stable ignition device (5), an air inlet (5-1) is arranged on the outer side of the stable ignition device (5), the ignition electrode connector (5-2) is connected with an ignition gun (5-3), the air inlet (5-1) is connected with an ignition rod (5-4), and the ignition gun (5-3) and the top of the ignition rod (5-4) are fixed through a stabilizer (5-5).
8. A burner of dual fuel gas with high and low pressure and high and low calorific value according to claim 1, characterized in that a swirler (2) is fixedly installed in the barrel (3).
9. The burner of high-low pressure and high-low heat value dual fuel gas as claimed in claim 1, wherein the fire basin brick (1) is of a multi-level step pagoda type structure, and a plurality of communicated circular holes are uniformly and upwards arranged on the side surface of the fire basin brick (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922088252.5U CN211625237U (en) | 2019-11-28 | 2019-11-28 | Burner with high-low pressure, high-low heat value double fuel gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922088252.5U CN211625237U (en) | 2019-11-28 | 2019-11-28 | Burner with high-low pressure, high-low heat value double fuel gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211625237U true CN211625237U (en) | 2020-10-02 |
Family
ID=72626975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922088252.5U Expired - Fee Related CN211625237U (en) | 2019-11-28 | 2019-11-28 | Burner with high-low pressure, high-low heat value double fuel gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211625237U (en) |
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2019
- 2019-11-28 CN CN201922088252.5U patent/CN211625237U/en not_active Expired - Fee Related
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