CN209960497U - High-pressure-drop high-wind-speed low-NOx-emission gas burner - Google Patents
High-pressure-drop high-wind-speed low-NOx-emission gas burner Download PDFInfo
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- CN209960497U CN209960497U CN201920440560.7U CN201920440560U CN209960497U CN 209960497 U CN209960497 U CN 209960497U CN 201920440560 U CN201920440560 U CN 201920440560U CN 209960497 U CN209960497 U CN 209960497U
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Abstract
The utility model relates to a gas burner of low NOx emission of high-pressure drop high wind speed, the novel nipple rectifier comprises a cylindrical shel, barrel front end externally mounted has the fire pan brick, the inside guide duct that is equipped with of barrel front end, on the guide duct was fixed in the fixed gusset that is equipped with in the barrel, barrel bottom lateral wall trompil and welding have the air butterfly valve, the barrel bottom is the terminal surface, be provided with inner ring air gun subassembly on the terminal surface, the pilot lamp, the ignition hole, see a fire the hole, the flame detector, the barrel is equipped with outer loop air gun subassembly outward, inner ring air gun subassembly and outer loop air gun subassembly are through reposition of redundant personnel three-way valve intercommunication, the reposition of redundant personnel three-way. The utility model discloses accord with the requirement that side burning or end burning, circular flame, fuel are gas, high wind speed, high pressure drop, realized the target that ultralow NOx discharged, the petrochemical industry reforming unit heating furnace of specially adapted special technology.
Description
Technical Field
The utility model relates to a combustor equipment field particularly, relates to a gas burner that high pressure drop high wind speed hangs down NOx and discharges.
Background
At present, for burner devices such as petrochemical heating furnaces and boilers, it is generally required that the pressure drop (i.e. head loss) of the combustion air passing through the device is lower than 300Pa, and that at the maximum heat release, when the air baffle is fully open, at least 90% of the effective suction should be used for passing through the burner, and at least 75% of the air side pressure drop should be used for passing through the throat of the burner. The lower pressure drop is beneficial to reducing energy consumption, improves the adjustability of the air regulating valve of the combustor, and enables an operator to flexibly adjust the load and the air distribution quantity of a single combustor to obtain the optimal combustion effect of each combustor. However, with the progress of the technology of heating furnaces and the like, the requirements of the heating furnaces on the shape (length, rigidity and section) of flame of the burners are increased along with the increase of the size of the heating furnaces, and the heating furnaces are more dependent on automatic intelligent regulation during operation, and the current trend is that each burner requires higher pressure drop (more than 500 Pa), and combustion-supporting air is ejected out of a fire pan brick at high speed, so that the more rigid flame with more proper length can be obtained, and the radiation heat transfer of a hearth is facilitated; in operation, when the vehicle is normally opened, the air door and the gas valve of the burner are all opened, the automatic control system controls the air supply quantity of the whole furnace only by adjusting the frequency of the fan (or adjusting the opening of the baffle plate of the main air duct), and the load required by the heating furnace is controlled by automatically controlling the opening of the main fuel gas valve of the burner in an interlocking way.
The common low-pressure drop combustor is not suitable for the requirement, and in addition, along with the improvement of the environmental protection requirement, the combustor with high pressure drop and high wind speed is also required to achieve the low NOx combustion effect. No combustor products of the type exist in China, and the combustor products are imported at present.
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 a gas burner that low NOx of high pressure drop high wind speed discharged can realize fuel classification, high pressure drop, high wind speed, and combustion stability is good, can realize low NOx and discharge.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
the design is a high-pressure-drop high-wind-speed low-NOx-emission gas burner which comprises a barrel body with a hollow cylinder structure, wherein a fire pan brick is installed outside the front end of the barrel body, an air guide cylinder is arranged inside the front end of the barrel body and is fixed on a fixing rib plate arranged in the barrel body, an opening is formed in the side wall of the bottom of the barrel body, an air butterfly valve is welded on the opening, an inlet of the air butterfly valve is a combustion-supporting air inlet, the bottom of the barrel body is an end face, an inner ring gas gun assembly, a pilot lamp, an ignition hole, a fire observation hole and a flame detector are arranged on the end face, the inner ring gas gun assembly extends to the end face of the upper portion of the fire pan brick, the pilot lamp extends to the middle position of the fire pan brick, a pilot lamp gas inlet is formed in the bottom of the pilot lamp, a flame detector interface is arranged at the bottom of, the outer loop air gun subassembly pierces through the fire pan brick, inner ring air gun subassembly and outer loop air gun subassembly pass through reposition of redundant personnel three-way valve intercommunication, reposition of redundant personnel three-way valve still with main fuel gas entry flange joint, be equipped with main fuel gas entry on the main fuel gas entry flange.
Preferably, the barrel is rolled up by the steel sheet and forms just the barrel inner wall is provided with heat preservation insulating layer and inside lining protection wire net.
Preferably, the air duct is a hollow heat-resistant steel pipe.
Preferably, the end face is sealed by a steel plate and an insulating layer.
Preferably, the fire pan brick is of a hollow cylindrical structure and is made of a refractory material through prefabricating and sintering.
Preferably, the fire basin brick comprises a taper pipe reducing section, a straight pipe section, a taper inverted expanding section and a first-stage flame zigzag straight section from bottom to top.
Preferably, the zigzag quantity of the first-stage attenuated zigzag straight section of the fire basin brick corresponds to the gun tube quantity of the inner ring air gun assembly, and the semicircular grooves of corresponding quantity are formed in the positions, corresponding to the gun tubes of the outer ring air gun assembly, of the straight tube sections of the fire basin brick.
Preferably, the inner ring air gun assembly consists of an annular collecting pipe, a sealing gasket, a plurality of inner air gun pipes welded on the annular collecting pipe, a plurality of spray heads and a plurality of gas delivery pipes, wherein each spray head is provided with a gas spray hole.
Preferably, the outer ring air gun assembly consists of an annular collecting pipe, a sealing gasket, a plurality of inner air gun pipes welded on the annular collecting pipe, a plurality of spray heads and a plurality of gas delivery pipes, wherein each spray head is provided with a gas spray hole.
Preferably, the air butterfly valve is hollow square tube structure and inside is provided with the heat preservation, the adjusting wind blade of air butterfly valve is adjusted the location by outside handle.
The utility model has the advantages that: high pressure drop, high wind speed and low NOx combustion emission are realized; by dividing the fuel into 4 grades, the combustion area forms the concentration of fuel gas and the concentration of oxygen, and forms hollow annular flame, thereby reducing the central temperature of the flame and effectively inhibiting the generation of NOx in the combustion process; the flame forming is good, rigid and powerful, does not cause misfire, is sufficient in combustion, can meet the requirements of side mounting, circular flame, high pressure drop and high wind speed of a petrochemical heating furnace, a boiler and the like, and realizes low NOx emission.
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 cross-sectional view of a gas burner with high pressure drop, high wind speed and low NOx emission according to an embodiment of the present invention.
Fig. 2 is a bottom view C of fig. 1.
Fig. 3 is a view of the combustion air inlet port in the direction D of fig. 1.
Fig. 4 is a top view of a fire pan brick according to an embodiment of the present invention.
Fig. 5 is a cross-sectional view a-a of the firebrick in fig. 4.
Fig. 6 is a cross-sectional view of the firebrick B-B of fig. 4.
In the figure: 1. an outer ring air gun assembly; 2. a fire pan brick; 3. an inner ring air gun assembly; 4. a beacon light; 5. an air duct; 6. fixing a rib plate; 7. a barrel; 8. a shunt three-way valve; 9. a primary fuel gas inlet flange; 10. an ignition hole; 11. a flame detector; 12. an air butterfly valve; 13. a fire observation hole; 14. an end face; 15. a primary fuel gas inlet; 16. a fuel gas inlet of the pilot burner; 17. a flame detector interface; 18. a flame gauge wind inlet; 19. a combustion air inlet.
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. 1-6, according to the embodiment of the utility model provides a gas burner that low NOx of high pressure drop high wind speed discharges, including outer loop air gun subassembly 1, fire pan brick 2, inner loop air gun subassembly 3, pilot lamp 4, wind-guiding section of thick bamboo 5, fixed gusset 6, barrel 7, reposition of redundant personnel three-way valve 8, main fuel gas inlet flange 9, ignition hole 10, flame detector 11, air butterfly valve 12, observation hole 13, terminal surface 14, main fuel gas inlet 15, pilot lamp gas inlet 16, flame detector interface 17, flame instrument wind inlet 18, combustion-supporting air inlet 19.
In the preferred embodiment, the cylinder 7 is fixed on a bottom plate or a side wall plate of a petrochemical heating furnace or a boiler by mounting bolts and welding steel plate flanges, and the upper opening of the cylinder 7 extends into a hearth;
the barrel 7 is an installation body of all components, the barrel 7 is a hollow cylinder structure and is coiled by a steel plate, and a heat insulation layer and a lining protection steel wire mesh are arranged on the inner wall of the barrel;
the middle channel of the cylinder body is a combustion air channel, the bottom end surface 14 is sealed by a steel plate and a heat insulation layer, and the bottom end surface 14 is provided with a through hole and a connecting surface for installing and fixing the annular air gun assembly 3, the pilot burner 4, the ignition hole 10, the observation hole 13 and the flame detector 11;
an opening on the side wall of the bottom of the cylinder 7 is welded with an air butterfly valve 12 into a whole for combustion-supporting air to enter;
a bolt hole and a through hole for the gun barrel of the outer ring air gun assembly 1 and the gun barrel of the inner ring air gun assembly 3 to pass through are arranged on a steel plate flange welded on the upper part of the barrel body 7, and a sleeve is arranged on the through hole corresponding to the position of each gun barrel for being convenient to overhaul and draw out;
an air guide cylinder 5 is arranged in the upper part of the cylinder 7 and used for guiding and rectifying combustion-supporting air for secondary combustion, and the air guide cylinder 5 is fixed in the cylinder 7 through a fixing rib plate 6 in a welding mode.
In the preferred embodiment, the gun tube of the outer ring air gun assembly 1 passes through the fire pan brick 2 supported on the brick fixing sleeve on the upper part of the cylinder 7 and extends into the hearth;
the outer ring air gun component 1 consists of an annular collecting pipe, a sealing gasket, a plurality of outer air gun tubes welded on the annular collecting pipe, a spray head, a gas delivery pipe and the like;
the steel plate flange is welded on the annular collecting pipe of the outer ring air gun assembly 1, and the outer ring air gun assembly is fastened on the mounting flange surface on the upper portion of the cylinder 7 through bolts by the flange.
In the preferred embodiment, the inner ring air gun assembly 3 is composed of an annular collecting pipe, a sealing gasket, a plurality of inner air gun pipes welded on the annular collecting pipe, a spray head, a gas delivery pipe and the like;
a waist-shaped steel plate flange is arranged on each inner air gun tube, and the inner ring air gun assembly 3 is fixed at the bottom of the cylinder 7 through bolts;
the barrel of the inner ring air gun assembly 3 penetrates through the bottom of the barrel 7 and extends into the barrel 7, and penetrates through a corresponding sleeve of an installation flange on the upper portion of the barrel 7, so that the spray head extends to the end face position on the upper portion of the fire pan brick 2.
In the preferred embodiment, the gas delivery pipes of the outer ring air gun assembly 1 and the inner ring air gun assembly 3 are communicated through a shunt three-way valve 8, and the shunt three-way valve 8 is also connected with a main fuel gas inlet flange 9;
during normal operation, primary fuel gas enters through the primary fuel gas inlet 15, and fuel gas is distributed to the outer ring air gun assembly 1 and the inner ring air gun assembly 3 by the diversion three-way valve 8 according to the requirements of the proportion of the graded fuel.
In the preferred embodiment, each nozzle of the outer ring air gun assembly 1 and the inner ring air gun assembly 3 is provided with a gas nozzle, and according to the low NOx combustion design, the position of the fuel gas is set during injection, and the fuel gas is mixed with combustion air to perform low NOx combustion.
In the preferred embodiment, the fire pan brick 2 is a hollow cylindrical structure and is made of refractory materials through prefabrication and sintering;
the interior of the fire basin brick 2 is provided with a combustion air channel, which is designed according to the fluid mechanics principle and comprises a tapered pipe reducing section, a supporting straight pipe section, a reverse tapered expanding section and a first-stage flame zigzag straight section from bottom to top;
the number of the sawteeth of the first-stage attenuated flame sawtoothed straight section corresponds to the number of the barrels of the inner ring air gun assembly 3, and a plurality of vertical holes are prefabricated in the position, corresponding to the barrels of the inner ring air gun assembly 3, of the first-stage attenuated flame sawtoothed straight section for the penetration of the vertical holes;
the outer part of the brazier brick consists of a support straight pipe section and a conical pipe reducing section, wherein the support straight pipe section is provided with a plurality of semicircular grooves corresponding to the positions of the outer gun barrel sleeve;
three vertical through holes are prefabricated on the support straight pipe section, and the purpose of the three vertical through holes is that when the combustor is installed on the side wall, the support straight section of the fire pan brick 2 is placed on the brick fixing sleeve of the cylinder body 7, and then the fire pan brick 2 is fixed on the installation flange of the cylinder body 7 through long bolts, so that the fire pan brick 2 is prevented from loosening, falling and falling due to pressure and vibration;
in the preferred embodiment, the pilot burner 4 is installed on a preset installation hole at the bottom of the burner cylinder 7 and extends into the burner, and the head of the pilot burner reaches the middle position of the fire pan brick 2 and is used for igniting primary fuel gas;
the fuel gas of the Changming lamp 4 enters from a fuel gas inlet 16 of the Changming lamp, and the air in the atmosphere is injected through a blowhole to enter a gun tube of the Changming lamp 4, mixed and combusted at a gun head flame tube port;
the pilot burner 4 is ignited manually, and the burner is always in an ignition state when working.
In the preferred embodiment, the ignition hole 10 and the observation hole 13 are welded and fixed on the preset mounting hole at the bottom of the combustor cylinder 7, and are mainly used for ignition and flame observation.
In the preferred embodiment, the flame detector 11 is mainly used for detecting the flame of the pilot burner 4, and the operator can conveniently master the working state of the burner at any time through feedback information, so that the operation safety is ensured.
In the preferred embodiment, the air butterfly valve 12 is welded with the combustor can 7 into a whole and is a combustion-supporting air inlet channel, the air butterfly valve 12 is a hollow square tube structure, and an insulating layer is arranged inside the air butterfly valve; the air adjusting blade of the air butterfly valve 12 can be positioned and adjusted through an external handle and is used for controlling the air intake of combustion air of the burner.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.
In a specific use of the preferred embodiment, the burner is provided with six inner ring air guns and six outer ring air guns, which are evenly distributed on a circumference centered on the burner.
The top of each gun barrel is provided with a spray head, and the spray head is provided with spray holes. A plurality of gas guns are fixed on the end face 14 of the bottom of the barrel through flanges and bolts, gas inlet ends of the gas guns are connected with an annular steam drum pipe, the annular steam drum pipe is connected with a main gas pipeline of a factory through a metal hose, and the gas guns are used for uniformly distributing gas to each gas gun.
The jet holes on the inner ring air gun divide the fuel gas into three stages, the first stage jets the fuel gas to the edge opening of the end part of the fire basin brick 2 along the tangential horizontal direction, and a stable combustion area is formed on the end surface; in the second stage, the fuel gas is horizontally sprayed to the center of the fire basin brick 2 to form interference mixing with combustion air, and secondary combustion is carried out outside the outlet of the fire basin brick 2; the third pole fuel gas is sprayed to the upper part of the center of the fire pan brick 2 and is mixed with the mixed oxygen-enriched flue gas after the second-stage combustion in an interference manner, and the third pole combustion is carried out.
The outer gas gun sprays fourth grade fuel gas to the fire pan center along the 2 outer conical surfaces of fire pan brick, and the region far away in the air above the fire pan brick 2 burns with mixing oxygen-containing flue gas hybrid, and fourth grade fuel gas draws a large amount of furnace high temperature flue gas and is drawn into the flame center when spraying, reduces flame temperature, restraines NOx and produces.
The throat of the fire basin brick 2 is small, large pressure drop is consumed, combustion-supporting air is sprayed out of the fire basin brick 2 at high air speed, a low-pressure vortex area is formed at the end face of the outlet of the fire basin brick 2 and is fully mixed with first-stage fuel gas to be combusted, the toothed convex block of the brick mouth is heated and burned away, and stable flame stabilizing first-stage flame is formed.
The high temperature formed by the primary flame continuously heats the fuel gas of the second stage and the third stage, which is beneficial to stable combustion and no misfire; the flame is rigid and powerful due to the high wind speed, combustion-supporting wind is sprayed out from the center of the flame, the flame is hollow annular, the temperature of the center of the flame is low, and the generation of NOx is effectively inhibited.
The pilot burner gas inlet 16 arranged at the bottom of the flameout-proof pilot burner 4 is connected with a gas pipeline through a hose, the pilot burner 4 is ignited manually, the pilot burner 4 ignites the main flame after the pilot burner is ignited, and the pilot burner 4 is used for igniting the primary flame and the secondary flame of the burner. The flameout-proof pilot burner 4 does not extinguish fire at a high wind speed, and a safe ignition source of the burner is ensured all the time.
The utility model discloses an inside undergauge structure of fire pan brick 2 improves the combustion-supporting wind speed of combustor, forms the pressure drop that increases in the combustor, and the high-speed blowout fire pan brick of combustion-supporting air 2, the rethread step by step with be divided into tertiary fuel co-combustion, form the ring flame that just is powerful, stable. The air guide pipe 5 is a hollow heat-resistant steel pipe, combustion-supporting air can be further rectified and then is linearly sprayed, so that low-temperature combustion-supporting air columnar flow is formed in the center of the flame, the flame is more rigid and straight, the shape is more regular, the length of the flame is longer, the flame is favorable for heat dissipation, the generation of a large amount of NOx is inhibited, and low NOx combustion is realized.
The utility model adopts the fuel staged combustion technology, the primary flame is combusted at the brick mouth of the fire pan to form stable annular flame attached to the brick mouth for preheating and igniting the secondary fuel gas, the secondary fuel gas and the combustion air rise simultaneously and are gradually mixed and combusted, the combustion forms hollow annular flame, the flame heat dissipation is better, and the temperature is controlled below the sensitive temperature area of NOx generation; when the three-level and four-level fuel gases are sprayed from the outside of the fire pan brick to the central area of the flame at different angles, a large amount of smoke in the furnace is injected and drawn into a combustion area to form smoke backflow combustion in the furnace, the combustion mixing process is relatively long, the flame is long, and the flame heat dissipation is facilitated, so that less NOx is generated.
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 (10)
1. A high-pressure-drop high-wind-speed low-NOx-emission gas burner comprises a barrel (7) with a hollow cylinder structure, and is characterized in that a fire pan brick (2) is installed at the outer portion of the front end of the barrel (7), an air guide cylinder (5) is arranged inside the front end of the barrel (7), the air guide cylinder (5) is fixed on a fixing rib plate (6) arranged in the barrel (7), an air butterfly valve (12) is welded on the side wall of the bottom of the barrel (7), an inlet of the air butterfly valve (12) is a combustion air inlet (19), the bottom of the barrel (7) is an end face (14), an inner ring air gun assembly (3), a pilot burner (4), an ignition hole (10), a pilot burner (13) and a flame detector (11) are arranged on the end face (14), the inner ring air gun assembly (3) extends to the upper end face position of the fire pan brick (2), and the pilot burner (4) extends to the middle position of the fire pan brick (2, the utility model discloses a flame detector, including pilot burner, flame detector, outer ring air gun subassembly (1), flame detector (11) side is equipped with flame instrument wind entry (18), barrel (7) are equipped with outer ring air gun subassembly (1) outward, outer ring air gun subassembly (1) pierces through fire basin brick (2), inner ring air gun subassembly (3) and outer ring air gun subassembly (1) are through reposition of redundant personnel three-way valve (8) intercommunication, reposition of redundant personnel three-way valve (8) still are connected with main fuel gas entry flange (9), be equipped with main fuel gas entry (15) on main fuel gas entry flange (9).
2. The gas burner with high pressure drop, high wind speed and low NOx emission as claimed in claim 1, wherein the barrel (7) is made of rolled steel plates, and the inner wall of the barrel (7) is provided with a heat insulation layer and a lining protecting steel wire mesh.
3. The gas burner with high pressure drop, high wind speed and low NOx emission according to claim 1, characterized in that the air duct (5) is a hollow heat-resistant steel tube.
4. A high pressure drop high wind speed low NOx emission gas burner according to claim 1, characterized in that the end face (14) is closed by steel plate and insulation.
5. A high pressure drop high wind speed low NOx emission gas burner according to claim 1, characterized in that the firebox brick (2) is a hollow cylindrical structure and the firebox brick (2) is made of a refractory material by precalcining.
6. The gas burner with high pressure drop, high wind speed and low NOx emission as claimed in claim 5, characterized in that the fire pot brick (2) comprises a taper pipe reducing section, a support straight pipe section, a taper expanding section and a one-stage flame zigzag straight section from bottom to top.
7. The gas burner with high pressure drop, high wind speed and low NOx emission according to claim 6, characterized in that the zigzag number of the first stage flame zigzag straight section of the fire basin brick (2) corresponds to the number of barrels of the inner ring air gun assembly (3), and the support straight section of the fire basin brick (2) is provided with a corresponding number of semicircular grooves at the positions of the barrels of the corresponding outer ring air gun assembly (1).
8. The gas burner with high pressure drop, high wind speed and low NOx emission of claim 1, wherein the inner ring gas gun assembly (3) is composed of an annular manifold, a sealing gasket, a plurality of inner gas gun pipes welded on the annular manifold, a plurality of nozzles and a plurality of gas delivery pipes, and each nozzle is provided with a gas jet hole.
9. The gas burner with high pressure drop, high wind speed and low NOx emission of claim 1, wherein the outer ring air gun assembly (1) is composed of an annular manifold, a sealing gasket, a plurality of inner air gun tubes welded on the annular manifold, a plurality of nozzles and a plurality of gas delivery pipes, and each nozzle is provided with a gas jet hole.
10. The gas burner with high pressure drop, high wind speed and low NOx emission according to claim 1, wherein the air butterfly valve (12) is of a hollow square tube structure, an insulating layer is arranged inside the air butterfly valve, and the air adjusting blades of the air butterfly valve (12) are adjusted and positioned by an external handle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440560.7U CN209960497U (en) | 2019-04-02 | 2019-04-02 | High-pressure-drop high-wind-speed low-NOx-emission gas burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440560.7U CN209960497U (en) | 2019-04-02 | 2019-04-02 | High-pressure-drop high-wind-speed low-NOx-emission gas burner |
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| CN209960497U true CN209960497U (en) | 2020-01-17 |
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| CN201920440560.7U Active CN209960497U (en) | 2019-04-02 | 2019-04-02 | High-pressure-drop high-wind-speed low-NOx-emission gas burner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094732A (en) * | 2019-04-02 | 2019-08-06 | 岳阳恒盛石化科技有限公司 | A kind of low NO of high pressure drop high wind speedxThe gas burner of discharge |
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2019
- 2019-04-02 CN CN201920440560.7U patent/CN209960497U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094732A (en) * | 2019-04-02 | 2019-08-06 | 岳阳恒盛石化科技有限公司 | A kind of low NO of high pressure drop high wind speedxThe gas burner of discharge |
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