CN217763419U - Regional pure oxygen fractional combustion low NOx combustor - Google Patents
Regional pure oxygen fractional combustion low NOx combustor Download PDFInfo
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- CN217763419U CN217763419U CN202221783564.3U CN202221783564U CN217763419U CN 217763419 U CN217763419 U CN 217763419U CN 202221783564 U CN202221783564 U CN 202221783564U CN 217763419 U CN217763419 U CN 217763419U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses a low NOx combustor of regional pure oxygen fractional combustion, including pure oxygen spray gun, central air gun, whirl steady flame cover, intermediate layer flame path brick, outside gas gun, inside gas gun, changming lamp, barrel, air regulating door, pure oxygen annular steam pocket, metal collapsible tube, ball valve and gas annular steam pocket. The utility model discloses a mode of regional pure oxygen burning can add the pure oxygen with a nimble mode to obtain the combustion-supporting combustion scheme of the oxygen boosting that multiple concentration is different, the multiple hierarchical scheme of fuel of deuterogamying realizes the burning of each regional fuel of flame and the different concentration proportions of combustion improver, is favorable to restraining NOx and produces, reduces the amount of flue gas, reaches energy-concerving and environment-protective purpose.
Description
Technical Field
The utility model relates to a petrochemical heating furnace burner equipment accords with regional oxygen boosting burning, end burning formula, fuel gas classification, blue circular flame, and the fuel is the gas, has the regional local pure oxygen of scene of a fire combustion and local ordinary combustion air, fuel gas and divides multistage low NOx combustor technique and device, realizes low NOx emission, reduces the flue gas emission volume, improves the characteristics of heating furnace thermal efficiency.
Background
At present, the petrochemical heating furnace burner mostly adopts air as a combustion improver, and adopts a low NOx technology on the burner aiming at the national and local environmental protection requirements so as to reduce the emission of pollutants. Because a series of technical means such as fuel classification, air classification, flue gas backflow combustion, rotational flow homogenization temperature, thick and thin combustion and the like are generally adopted, the flame temperature is actually controlled to avoid a high-temperature NOx generation interval, and therefore the low NOx emission requirement can be met. However, the phenomena of flame temperature reduction, flame elongation, actual heat radiation efficiency and incomplete combustion occasionally occur, which leads to a slight reduction in the thermal efficiency of the heating furnace, and the problem of the reduction in the thermal efficiency is more serious particularly for the heating furnace with a low furnace temperature. When the thermal efficiency of the furnace is reduced, the energy consumption of the product is increased, and the same output means that more fuel gas is consumed, i.e. the emission of flue gas is increased.
In some factories with excess oxygen having conditions, pure oxygen or oxygen-enriched combustion technology is adopted, so that the effects of energy conservation and emission reduction can be achieved. However, the pure oxygen combustion flame temperature is very high, the requirement on combustor equipment is high, the material of the burner nozzle is made of heat-resistant stainless steel with high alloy content, the cost is high, and the service life is short; and a combustion mode of increasing the oxygen concentration of combustion-supporting air is adopted, namely the oxygen concentration of the combustion-supporting air is increased from 20.9 percent to 25 to 35 percent, and then the combustion-supporting air is sent to a combustor for combustion supporting. After the oxygen concentration is increased, the combustion speed is increased, the fire scene temperature is high, more thermal NOx is generated, and the environmental protection requirement is difficult to achieve.
With the development and maturity of oxygen production technology and the reduction of the cost of oxygen production, many petrochemical enterprises are continuously trying on the oxygen-enriched combustion technology, but the oxygen-enriched combustors available on the market are seriously lacking and can not completely realize low NOx combustion.
To this end, we propose a zone pure oxygen staged combustion low NOx burner to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Therefore, in view of the above problems, the present invention provides a regional pure oxygen staged combustion low NOx burner to solve the above technical problems.
In order to achieve the purpose, the utility model adopts the following technical scheme: a regional pure oxygen staged combustion low NOx burner comprises a pure oxygen spray gun, a central air gun, a rotational flow flame stabilizing cover, an interlayer flue brick, an external gas gun, an internal gas gun, an incandescent lamp, a cylinder body, an air adjusting door, a pure oxygen annular steam pocket, a metal hose, a ball valve and a gas annular steam pocket;
a plurality of round holes are formed in the end plate at the bottom of the barrel, sleeves are welded in the round holes, and the central air gun, the external gas gun, the internal gas gun and the Changsheng lamp head penetrate through the corresponding round holes and the sleeves and are fixedly installed on the end plate at the bottom of the barrel through flanges;
the side wall of the cylinder body is provided with a square pipe for combustion air to enter, and an air adjusting door is arranged inside the square pipe;
the interlayer flue brick is arranged at the top of the cylinder body, is supported by a ring plate at the top of the cylinder body and is positioned in the hearth; a plurality of uniformly distributed round holes are arranged on the end plate at the bottom of the interlayer flue brick.
Preferably, the interlayer flue brick divides a burner flame area into a pure oxygen combustion space, a conventional air combustion-supporting space and an oxygen-deficient combustion space outside the brick.
Preferably, the interlayer flue brick is of a hollow annular structure, the outermost layer of the interlayer flue brick is provided with a cylinder with an inner conical opening and is connected with the bottom of the innermost layer of the cylinder to form an interlayer space, the interlayer space is a pure oxygen combustion space, and the bottom of the interlayer space is provided with a round hole for a pure oxygen spray gun and an internal gas gun head to pass through.
Preferably, the swirl flame holder comprises a long sleeve and a swirl plate welded on the long sleeve, and the long sleeve penetrates through and is welded and fixed at the center of the bottom end plate of the cylinder body.
Preferably, the head of the central air gun penetrates through the bottom of the barrel and the inside of the long sleeve of the rotational flow flame stabilizing cover and reaches the upper part of the cyclone, the tail of the central air gun is provided with a ball valve, the ball valve is provided with a joint, and the joint is connected with the gas annular steam pocket through a metal hose.
Preferably, the head of the pure oxygen spray gun penetrates through the bottom of the barrel and the bottom of the interlayer flue brick to reserve corresponding round holes, the gun head of the pure oxygen spray gun is arranged in an interlayer pure oxygen combustion space, each gun head of the pure oxygen spray gun is uniformly distributed in an interlayer of the pure oxygen combustion space along the circumference, the pure oxygen spray gun is fixedly arranged on an end plate at the bottom of the barrel through a flange welded on the gun barrel, and the tail of the pure oxygen spray gun is communicated with a pure oxygen annular steam pocket through a joint and a metal hose.
Preferably, the bottom that inside gas rifle head passed the barrel and the round hole that corresponds is reserved to intermediate layer flame path brick bottom, and the rifle head of inside gas rifle reaches interbedded pure oxygen combustion space, inside gas rifle is fixed on barrel bottom end plate through the flange mounting of welding on the barrel, every rifle head of inside gas rifle is along the circumference equipartition in the intermediate layer of pure oxygen combustion space, it distributes on same pitch circle with the pure oxygen spray gun, and the crisscross equipartition each other with it, inside gas rifle afterbody is through connecting, metal collapsible tube and gas annular steam pocket intercommunication.
Preferably, outside gas gun is provided with more than two to along intermediate layer flame path brick outside circumference equipartition, the rifle head and the barrel of outside gas gun pass the bottom end plate of barrel and the inside heat preservation of lateral wall, and fix on barrel bottom end plate through the flange mounting of welding on the barrel, the barrel lower part welding of outside gas gun is on gas annular steam pocket.
Preferably, the pilot burner passes through a corresponding round hole in the bottom end plate of the barrel, the head of the pilot burner penetrates into the barrel and is arranged in a rotational flow flame stabilizing cover at the center of the interlayer flame path brick, the pilot burner is fixed on the bottom end plate of the barrel through a flange welded on the barrel, and the tail of the pilot burner is provided with a threaded connector and is connected with an external gas pipeline through a metal hose or a hard pipe.
By adopting the technical scheme, the beneficial effects of the utility model are that:
the utility model realizes the regional pure oxygen staged combustion low NOx combustion, the central channel of the interlayer flue brick is internally provided with the central gas gun and is mixed with the combustion air in the channel to form primary conventional combustion, and the distribution amount of gas is small and adjustable, so that the primary combustion belongs to the over-dilute fuel, the temperature of combustion flame is low, and the generation of NOx can be effectively inhibited; the jacket of the flue brick is distributed with a plurality of pure oxygen nozzles and a plurality of fuel gas nozzles, secondary combustion in a pure oxygen combustion-supporting mode is formed in the interlayer, as N2 gas is not available, the flame temperature is high, the opportunity of forming NOx is low, and the amount of pure oxygen is much larger than the theoretical proportion of fuel gas, so the flame temperature of the secondary combustion can be controlled; the interlayer flue brick is externally provided with a pair of fuel gas nozzles, the third-stage fuel gas is graded and sprayed to a flame area at different angles along the outer wall of the flue brick, high-temperature flue gas which flows back from a hearth is arranged outside the flue brick, the third-stage fuel gas can inject a large amount of flue gas to be brought into the flame area, and the flue gas and oxygen-containing flue gas after the first-stage combustion and the second-stage combustion are subjected to mixed combustion.
The utility model discloses a mode of regional pure oxygen burning can add the pure oxygen with a nimble mode to obtain the combustion-supporting combustion scheme of the oxygen boosting that multiple concentration is different, the multiple hierarchical scheme of fuel of deuterogamying realizes the burning of each regional fuel of flame and the different concentration proportions of combustion improver, is favorable to restraining NOx and produces, reduces the amount of flue gas, reaches energy-concerving and environment-protective purpose.
Drawings
FIG. 1 is a front view of a combustor for a regional pure oxygen staged combustion low NOx combustor provided by the present invention;
FIG. 2 is a top view of a burner for a regional pure oxygen staged combustion low NOx burner provided by the present invention;
FIG. 3 is a bottom view of a burner for a regional pure oxygen staged combustion low NOx burner according to the present invention;
FIG. 4 is a sectional view of a sandwich fire pan brick of a regional pure oxygen staged combustion low NOx burner provided by the present invention;
fig. 5 is a top view of a sandwich fire pan brick of a regional pure oxygen staged combustion low NOx burner provided by the present invention.
The reference numbers in the figures: the device comprises a pure oxygen spray gun-1, a central air gun-2, a rotational flow flame stabilizing cover-3, an interlayer flue brick-4, an external gas gun-5, an internal gas gun-6, a pilot burner-7, a cylinder-8, an air adjusting door-9, a pure oxygen annular steam drum-10, a metal hose-11, a ball valve-12 and a gas annular steam drum-13.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.
Referring to fig. 1 to 5, the utility model provides a regional pure oxygen staged combustion low NOx burner, which comprises a pure oxygen spray gun 1, a central air gun 2, a rotational flow flame stabilizing cover 3, an interlayer flue brick 4, an external gas gun 5, an internal gas gun 6, a pilot burner 7, a cylinder 8, an air adjusting door 9, a pure oxygen annular steam pocket 10, a metal hose 11, a ball valve 12 and a gas annular steam pocket 13;
in the embodiment, the cylinder 8 is a hollow cup-shaped structure and is used as a carrier for mounting other components, the cylinder is fixedly mounted with the bottom plate of the heating furnace through a steel plate flange on the outside, and the upper part of the cylinder extends into the bottom plate of the heating furnace;
wherein, the outer wall of the cylinder 8 is made of steel plate, and in order to prevent the heat of flame or preheated air from being transmitted to the outer wall during operation, a heat-insulating layer is arranged in the cylinder; a plurality of circular holes are formed in the end plate at the bottom of the barrel 8, sleeves are welded in the corresponding circular holes and are respectively used as mounting positions of the central air gun 2, the external gas gun 5, the internal gas gun 6 and the pilot burner 7, and the heads of the parts penetrate through the corresponding circular holes and the sleeves and are fixedly mounted on the end plate at the bottom of the barrel 8 through flanges;
in addition, a fire observation hole, an ignition hole, a fire detection mounting hole and the like are welded on the bottom end plate of the cylinder 8; the side wall of the barrel is provided with a square pipe for combustion air to enter, the square pipe is made of steel plates in a welding mode, a heat insulation layer is arranged inside the square pipe, and a steel plate flange is arranged at the inlet of the square pipe and used for being connected with an external air duct; the square tube is internally provided with an air adjusting door 9, and the opening of the valve plate is controlled by rotating the external handle, so that the combustion-supporting air quantity is controlled.
In the embodiment, the interlayer flue brick 4 is arranged at the top of the cylinder 8, is supported by a ring plate at the top of the cylinder 8 and is positioned in the hearth;
wherein, intermediate layer flame path brick 4 is hollow annular structure, for refractory material prefabrication, its structure is: the outermost layer is a cylinder with certain thickness, the outer surface of the outermost layer is a cylindrical surface, the upper end of the inner part is a conical opening, and the lower end of the inner part is a straight cylinder; the inner layer is a cylinder with certain thickness, and the bottom of the inner layer and the bottom of the outermost layer cylinder are connected into a whole through an end ring plate with certain thickness; an annular space is formed between the inner layer and the outer layer and is a pure oxygen combustion space.
A plurality of uniformly distributed round holes are formed in the bottom end plate of the interlayer flue brick 4, and the gun heads of the pure oxygen spray gun 1 and the internal gas gun 6 penetrate through the corresponding round holes in the bottom end plate of the interlayer flue brick 4 from bottom to top;
specifically, when the burner is operated, pure oxygen sent by the pure oxygen spray gun 1 and fuel gas sent by the internal gas gun 6 are mixed and combusted in an interlayer of the interlayer flue brick 4, the pure oxygen mixed combustion flame is stable, and the temperature of the combustion flame is relatively high, so that an annular high-temperature stable combustion area is formed at the brick opening of the interlayer flue brick 4, and the subsequent third-stage combustion is facilitated;
it should be noted that, in this embodiment, the interlayer flue brick 4 may be segmented and prefabricated according to the manufacturing process of the refractory material and the installation requirement, the prefabricated components are assembled on site, and whatever way is adopted to segment and prefabricate, the structural scheme shown in this figure is finally formed, and all the structural schemes fall within the protection scope of this patent.
In this embodiment, the swirling flame holder 3 comprises a long sleeve and a swirling sheet welded thereon, and the long sleeve passes through and is welded and fixed at the center of the bottom end plate of the cylinder 8; the inner part of the long sleeve of the rotational flow flame stabilizing cover 3 is the installation position of the central air gun 2; the rotational flow flame stabilizing cover 3 has the function of enabling combustion-supporting air passing through the center of the interlayer flue brick 4 to generate rotational flow, so that a low-pressure rotational flow area is formed at the upper part of the rotational flow cover, the mixing of fuel gas jetted by the central fuel gas gun 2 and the combustion-supporting air is enhanced, the combustion is facilitated, and the flame is stabilized.
In this embodiment, the central air gun 2 is composed of a gun head, a gun barrel and the like, wherein the gun head is made of high-temperature-resistant metal material, and the head is provided with a plurality of spray holes; the head of the central air gun 2 penetrates through the bottom of the cylinder 8 and the long sleeve of the rotational flow flame stabilizing cover 3 to reach the upper part of the rotational flow, and the central air gun 2 is fixed on the bottom end plate of the cylinder 8 through a steel plate flange; wherein, the tail part of the central air gun 2 is provided with a ball valve 12, the ball valve is provided with a joint and is connected with a gas annular steam pocket 13 through a metal hose 11; the ball valve 12 is used to regulate the amount of fuel delivered from the gas annular drum 13.
As shown in fig. 2, in the present embodiment, the number of the pure oxygen spray guns 1 is 4, and the pure oxygen spray guns are composed of gun heads, gun barrels and the like, the gun heads are made of high temperature resistant metal materials, and the heads thereof are provided with a plurality of spray holes; the head of the pure oxygen spray gun 1 penetrates through the bottom of the barrel body 8 and the bottom of the interlayer flue brick 4 to reserve corresponding round holes, the gun heads reach the interlayer pure oxygen combustion space, a plurality of gun heads are uniformly distributed in the interlayer of the pure oxygen combustion space along the circumference, and the pure oxygen spray gun 1 is fixedly arranged on an end plate at the bottom of the barrel body 8 through a flange welded on the gun barrel;
wherein, the tail part of the pure oxygen spray gun 1 is communicated with a pure oxygen annular steam drum 10 through a joint and a metal hose 11; the pure oxygen delivered from the pure oxygen annular steam pocket 10 is uniformly sprayed in the interlayer of the pure oxygen combustion space through the spray holes on the plurality of gun heads, and is mixed with the fuel gas sprayed from the internal fuel gas gun 6 and then is combusted, so that the second-stage pure oxygen combustion flame is formed.
As shown in fig. 2, in the present embodiment, the number of the internal gas guns 6 is 4, and the internal gas guns are composed of gun heads, gun barrels and the like, the gun heads are made of high temperature resistant metal materials, and the heads of the gun heads are provided with a plurality of spray holes; the head of the internal gas gun 6 penetrates through the bottom of the barrel body 8 and the bottom of the interlayer flame path brick 4 to reserve corresponding round holes, the gun head reaches a pure oxygen combustion space of the interlayer, and the internal gas gun 6 is fixedly arranged on an end plate at the bottom of the barrel body 8 through a flange welded on a gun barrel;
a plurality of gun heads of the internal gas gun 6 are uniformly distributed in an interlayer of the pure oxygen combustion space along the circumference, are distributed on the same pitch circle with the pure oxygen spray guns 1 and are uniformly distributed in a staggered way with the pure oxygen spray guns so as to be beneficial to more uniformly mixing the fuel gas and the pure oxygen; the tail part of the internal gas gun 6 is communicated with a gas annular steam pocket 13 through a joint and a metal hose 11; the fuel gas delivered from the fuel gas annular steam pocket 13 is uniformly sprayed in the interlayer of the pure oxygen combustion space through the spray holes on the plurality of gun heads, and is mixed with the pure oxygen sprayed from the pure oxygen spray gun 1 and then is combusted, so that the second-stage pure oxygen combustion flame is formed.
As shown in fig. 2, in this embodiment, the number of the external gas guns 5 is 8, the external gas guns are uniformly distributed along the outermost circumference of the interlayer flue brick 4, and each external gas gun is composed of a gun head and a gun barrel, and the gun head and the gun barrel penetrate through the bottom end plate of the barrel 8 and the insulating layer inside the side wall, and are fixedly mounted on the bottom end plate of the barrel 8 through the flange welded on the gun barrel. The gun barrel lower part is welded on gas annular steam pocket 13, and fuel gas is sent to 5 rifle heads of outside gas gun from gas annular steam pocket 13, and the flue gas in partly furnace is penetrated to the fuel gas that sprays from the orifice to be sent to the upper flame region along 4 outer walls of intermediate layer flame path brick, mix with the first grade of oxygen of central zone and second grade burning back flue gas, accomplish the tertiary burning.
In this embodiment, the air damper 9 includes a handle, a limiting claw, a blade, a rotating shaft, and other components, is installed inside a square tube on the side wall of the cylinder 8 for combustion air to enter, and is rotated to adjust the opening of the blade, thereby adjusting the amount of combustion air.
It should be noted that, in the present embodiment, the pilot burner 7 is a general component of a general burner, and has an effect of always providing a small flame species when the burner is running, so as to ensure that an open flame is maintained in the furnace chamber when the burner of the heating furnace is extinguished in an abnormal condition, thereby avoiding a safety accident of flash explosion;
the pilot burner 7 passes through a corresponding round hole on the bottom end plate of the cylinder 8, the head part extends into the cylinder 8, reaches the vicinity of the rotational flow flame stabilizing cover 3 at the center of the interlayer flame path brick 4, and is fixedly arranged on the bottom end plate of the cylinder 8 through a flange welded on the gun barrel. The tail part of the pilot burner 7 is a screwed joint and is connected with an external gas pipeline through a metal hose or a hard pipe.
The utility model provides a pair of low NOx combustor of regional pure oxygen staged combustion, through setting up interbedded flame path brick, divide into several parts with the flame region, set up different combustion mode in the region of difference, the central zone sets up the combustion-supporting mode of conventional air, the intermediate layer adopts the pure oxygen combustion mode, the flame path brick adopts lean oxygen combustion mode outward, through control intermediate layer pure oxygen supply volume and match regulation and control air quantity with it, the oxygen concentration that can realize combustor overall combustion improver is in conventional 20.9% ~ oxygen boosting 35%, adopt 100% pure oxygen combustion-supporting even completely. The conventional combustion mode adopts air for combustion supporting, wherein the nitrogen gas contains about 78 percent, the smoke amount is large, a large amount of heat is lost in smoke exhaust, and the oxygen-enriched combustion improves the total oxygen content of combustion-supporting air, reduces the nitrogen gas proportion, and can reduce the amount of smoke and the heat loss of smoke exhaust, thereby improving the heat efficiency of the heating furnace and reducing the fuel consumption.
In the operation of various combustion modes in different areas, the thick-thin combustion can be realized in each area by controlling the oxygen amount, the fuel gas grading proportion and the like, so that the purposes of stabilizing flame combustion and flexibly controlling the temperature of the flame area are achieved, the combustion is enabled to avoid the temperature range generated by thermal NOx to the maximum extent, the low NOx combustion is realized, and the emission concentration of pollutants is reduced.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A regional pure oxygen staged combustion low NOx burner is characterized by comprising a pure oxygen spray gun, a central air gun, a rotational flow flame stabilizing cover, an interlayer flame path brick, an external gas gun, an internal gas gun, a pilot burner, a cylinder body, an air adjusting door, a pure oxygen annular steam pocket, a metal hose, a ball valve and a gas annular steam pocket;
the central air gun, the external gas gun, the internal gas gun and the incandescent lamp head penetrate through the corresponding round holes and the sleeves and are fixedly installed on the bottom end plate of the cylinder through flanges;
the side wall of the cylinder body is provided with a square pipe for combustion air to enter, and an air regulating door is arranged inside the square pipe;
the interlayer flue brick is arranged at the top of the cylinder body, is supported by a ring plate at the top of the cylinder body and is positioned in the hearth; and a plurality of uniformly distributed round holes are formed in the end plate at the bottom of the interlayer flue brick.
2. The zoned pure oxygen staged combustion low NOx burner of claim 1, wherein: the interlayer flame path brick divides a flame area of the combustor into a pure oxygen combustion space, a conventional air combustion-supporting space and a brick external oxygen-deficient combustion space.
3. The zoned pure oxygen staged combustion low NOx burner as claimed in claim 1 or 2, wherein: the interlayer flue brick is of a hollow annular structure, the cylinder with an inner conical opening at the outermost layer is connected with the bottom of the cylinder at the innermost layer to form an interlayer space which is a pure oxygen combustion space, and the bottom of the interlayer space is provided with a round hole for a pure oxygen spray gun and a gun head of an internal gas gun to pass through.
4. The zoned pure oxygen staged combustion low NOx burner of claim 1, wherein: the rotational flow flame stabilizing cover comprises a long sleeve and a rotational flow sheet welded on the long sleeve, and the long sleeve penetrates through and is welded and fixed at the center of the bottom end plate of the cylinder body.
5. The zoned pure oxygen staged combustion low NOx burner of claim 1, wherein: the head of the central air gun penetrates through the bottom of the barrel and the inside of the long sleeve of the rotational flow flame stabilizing cover and reaches the upper part of the rotational flow device, the tail of the central air gun is provided with a ball valve, the ball valve is provided with a joint, and the joint is connected with the gas annular steam pocket through a metal hose.
6. The zoned pure oxygen staged combustion low NOx burner as claimed in claim 1, wherein: the oxygen spraying gun is characterized in that the head of the oxygen spraying gun penetrates through the bottom of the barrel and the bottom of the interlayer flue brick to reserve corresponding round holes, the gun head of the oxygen spraying gun is arranged in an interlayer oxygen combustion space, each gun head of the oxygen spraying gun is uniformly distributed in an interlayer of the oxygen combustion space along the circumference, the oxygen spraying gun is fixedly installed on an end plate at the bottom of the barrel through a flange welded on the gun barrel, and the tail of the oxygen spraying gun is communicated with an annular pure oxygen steam pocket through a joint and a metal hose.
7. The zoned pure oxygen staged combustion low NOx burner of claim 1, wherein: the gas gun is characterized in that corresponding round holes are reserved in the bottom of the inner gas gun head, penetrating through the barrel, and the bottom of the interlayer flue brick, the gun head of the inner gas gun reaches the interlayer pure oxygen combustion space, the inner gas gun is fixed on an end plate at the bottom of the barrel through a flange welded on the barrel, each gun head of the inner gas gun is uniformly distributed in an interlayer of the pure oxygen combustion space along the circumference, the gun heads and the pure oxygen spray guns are distributed on the same pitch circle and are uniformly distributed in a staggered mode with the gun heads, and the tail of the inner gas gun is communicated with a gas annular steam pocket through a joint, a metal hose and a gas annular steam pocket.
8. The zoned pure oxygen staged combustion low NOx burner of claim 1, wherein: the outer gas gun is provided with more than two and evenly distributed along the circumference of the outermost side of the interlayer flame path bricks, the gun head and the gun barrel of the outer gas gun penetrate through the bottom end plate of the barrel and the heat preservation layer inside the side wall and are fixed on the bottom end plate of the barrel through flange installation welded on the gun barrel, and the lower part of the gun barrel of the outer gas gun is welded on the gas annular steam bag.
9. The zoned pure oxygen staged combustion low NOx burner as claimed in claim 1, wherein: the pilot burner penetrates through a corresponding round hole in an end plate at the bottom of the barrel, the head of the pilot burner extends into a rotational flow flame stabilizing cover arranged in the barrel and at the center of the interlayer flame path brick, the pilot burner is fixedly arranged on the end plate at the bottom of the barrel through a flange welded on a gun barrel, and the tail of the pilot burner is a threaded joint and is connected with an external fuel gas pipeline through a metal hose or a hard pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221783564.3U CN217763419U (en) | 2022-07-11 | 2022-07-11 | Regional pure oxygen fractional combustion low NOx combustor |
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| CN202221783564.3U CN217763419U (en) | 2022-07-11 | 2022-07-11 | Regional pure oxygen fractional combustion low NOx combustor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789637A (en) * | 2022-11-29 | 2023-03-14 | 岳阳钟鼎热工电磁科技有限公司 | Pure oxygen combustor capable of controlling flame shape and temperature |
-
2022
- 2022-07-11 CN CN202221783564.3U patent/CN217763419U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789637A (en) * | 2022-11-29 | 2023-03-14 | 岳阳钟鼎热工电磁科技有限公司 | Pure oxygen combustor capable of controlling flame shape and temperature |
| CN115789637B (en) * | 2022-11-29 | 2024-04-16 | 湖南钟鼎热工科技股份有限公司 | Pure oxygen burner capable of controlling flame shape and temperature |
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