CN108895446B - Odd number circulation ignition high-efficiency energy-saving ultralow NO X Gas burner - Google Patents
Odd number circulation ignition high-efficiency energy-saving ultralow NO X Gas burner Download PDFInfo
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- CN108895446B CN108895446B CN201810842999.2A CN201810842999A CN108895446B CN 108895446 B CN108895446 B CN 108895446B CN 201810842999 A CN201810842999 A CN 201810842999A CN 108895446 B CN108895446 B CN 108895446B
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- 239000007789 gas Substances 0.000 claims abstract description 103
- 239000011449 brick Substances 0.000 claims abstract description 76
- 239000002737 fuel gas Substances 0.000 claims abstract description 42
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 210000002445 nipple Anatomy 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 66
- 229910000831 Steel Inorganic materials 0.000 claims description 53
- 239000010959 steel Substances 0.000 claims description 53
- 238000009413 insulation Methods 0.000 claims description 13
- 238000004321 preservation Methods 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 9
- 230000000670 limiting effect Effects 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 47
- 239000000446 fuel Substances 0.000 abstract description 15
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
The invention discloses an odd number efficient energy-saving ultralow NO with cyclic ignition X The gas burner comprises a barrel, a fire basin brick, a gas gun, an annular steam drum assembly and a pilot lamp are arranged in the barrel, a guide pipe is arranged in the fire basin brick, the end face of the bottom of the barrel is fixedly connected with a ventilation valve, a combustion-supporting air inlet of the side face of the ventilation valve is connected with a square pipe in a welded mode, the square pipe is connected with an air supply system air duct of a heating furnace through a flange nipple, the inner wall of the fire basin brick is divided into 4 sections, a cone section necking section, a straight section, a cone section flaring section and an upper groove section are sequentially arranged from bottom to top, a plurality of square grooves are formed in the upper groove section, and reserved round holes are formed below the grooves. The burner realizes the secondary fuel gas staged combustion, the primary fuel is circularly ignited, the ignition is reliable, the combustion is uniform and stable, and the secondary flame combustion process can reasonably control the flame temperature by changing the injection speed, the injection angle and the size of the spray holes, thereby achieving the ultra-low NO X The purpose of combustion emission.
Description
Technical Field
The combustion for petrochemical heating furnace and boilerThe technical field of devices, in particular to an odd-number cyclic ignition high-efficiency energy-saving ultralow NO X A gas burner.
Background
Various types of gas burners developed in recent years all use low NO X Combustion technology, since each manufacturer is applying low NO X Combustion inhibiting NO X The technology is different when the emphasis, the structure of the burner is different, and the use effect is quite different. Particularly when the technologies of non-equivalent combustion, fuel classification, flue gas backflow combustion and the like are applied, the problem of nonuniform flame temperature field of the burner occurs under the working condition of low flame temperature control due to the influence of low temperature of the hearth and low load of the burner, so that partial fuel is not ignited and burned out in a designed combustion area, or oxygen is not timely obtained due to the influence of the follow-up bias flow of CO which is a process product of oxygen-deficient combustion, partial combustible matters are escaped from the hearth, and secondary combustion is formed or is directly discharged along with flue gas, so that the combustion efficiency is reduced and the safety risk of unstable furnace pressure of the hearth is caused.
The petrochemical heating furnace burner has a required operation ratio of 5:1 for the gas burner, the burner has a larger operation load adjustment range according to the requirements of the process, and the low-load operation condition is common, so that more efficiency reduction problems occur, and more importance is paid at present. The burners which are problematic in low-temperature hearths and small loads are analyzed, and most of the burners are related to the flame stabilizing mode of each air gun of the burners, are not suitable in flame stabilizing fuel distribution proportion, and the burners with a plurality of air guns are arranged outside the fire pan bricks, so that when the loads are small, the secondary gas of the outer gun is very low in spraying speed, and is difficult to spray to the upper part of the center of the fire pan to mix with oxygen-containing flue gas subjected to primary combustion, so that the problem of insufficient combustion occurs.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides an odd-number cyclic ignition high-efficiency energy-saving ultralow NO X The gas burner can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
odd number circulation ignition high-efficiency energy-saving ultralow NO X The gas burner comprises a cylinder body, wherein a brick supporting plate is arranged on the top end surface of the cylinder body, the upper end surface of the brick supporting plate is fixedly connected with a brick fixing sleeve, a fire basin brick is arranged on the brick supporting plate and is fixed by the brick fixing sleeve, a guide pipe is arranged in the fire basin brick, and the bottom end plate of the guide pipe is fixedly connected with the cylinder body through a flat steel bracket I; the end face of the bottom of the cylinder body is fixedly connected with the air regulating valve.
The gas gun and the annular steam pocket assembly are fixedly connected with the steel plate on the end face of the bottom of the air regulating valve, the top of the gas gun and the annular steam pocket assembly penetrate through the air regulating valve and the cylinder body to reach the fire basin brick, and the gas gun and the annular steam pocket assembly are connected with a gas pipeline related to the heating furnace through a main gas hose.
The fire pot is characterized in that a pilot lamp is arranged in the cylinder body, the bottom of the pilot lamp is fixedly connected with a bottom end face steel plate of the air adjusting valve, the top of the pilot lamp passes through the air adjusting valve and the cylinder body to the fire pot brick, and the pilot lamp is connected with a gas pipe line related to the heating furnace through a pilot lamp gas hose.
The combustion-supporting air inlet of the side face of the air regulating valve is connected with the square pipe in a welded mode, the square pipe is connected with an air duct of an air supply system of the heating furnace through a flange nipple, and an ignition hole, a fire-watching hole, a reserved hole for installing a pilot lamp, a gas gun and an annular steam drum assembly of the gas gun and corresponding flange bolt holes are formed in a steel plate on the end face of the bottom of the air regulating valve.
The fire basin brick is of a hollow cylindrical structure, the outer wall surface of the fire basin brick is a straight cylinder, the inner wall of the fire basin brick (2) is divided into 4 sections, a cone section necking section, a straight section, a cone section flaring section and an upper groove section are sequentially arranged from bottom to top, the upper groove section is provided with a plurality of square grooves, a reserved round hole is arranged below the grooves, and the inner diameter of the upper groove section is larger than that of the cone section flaring section.
The gas gun and the annular steam drum assembly thereof comprise gas guns, the gas guns are connected with the annular steam drum pipe in a welding way, the number of the gas guns is an odd number, and the gas guns are uniformly distributed in the wall of the fire pot brick by taking the center of the barrel as the center according to the circumference; the gas gun comprises a gun barrel, the gun barrel is fixedly connected with the nozzle, and the gun barrel penetrates through a reserved hole of a steel plate at the bottom end face of the air regulating valve and reserved round holes of the cylinder body and the fire pot brick; the spherical surface of the nozzle head is provided with a first-stage gas spray hole and a second-stage fuel gas spray hole, the first-stage gas spray hole faces towards the non-adjacent other gas gun, and the second-stage fuel gas spray hole faces right above the center of the fire pot brick.
Further, a lower flange is arranged on the end face of the bottom of the cylinder body, and the lower flange is fixedly connected with a flange annular plate arranged on the upper end face of the air regulating valve through flange bolts;
further, the upper part of the inner wall of the cylinder is fixedly connected with the first flat steel bracket, and the center of the first flat steel bracket is connected with a bolt; the guide tube comprises a round tube, the round tube is welded with a bottom end plate, the bottom end plate is provided with a threaded hole corresponding to the specification of a bolt on the first flat steel support, and the bottom end plate is fixedly connected with the first flat steel support through the bolt.
Further, the inner wall of the cylinder body is provided with a heat preservation and insulation layer, and the inner side of the heat preservation and insulation layer is provided with a lining protection steel wire mesh.
Further, the shell of the air valve is of a cylindrical hollow structure, the inner wall of the air valve is provided with a heat preservation and insulation layer, and the inner side of the heat preservation and insulation layer is provided with a lining protection steel wire mesh.
Further, a fixed cylinder is arranged in the air regulating valve, an upper port of the fixed cylinder is welded and connected with a flange annular plate of the upper end face of the air regulating valve, and a lower port of the fixed cylinder is welded and connected with the inner wall of a heat preservation and insulation layer of the bottom end face of the air regulating valve; the rotary cylinder is arranged in the fixed cylinder, the rotary cylinder and the fixed cylinder are thin-wall cylinders, 4 rectangular holes which are uniformly distributed are formed in the side wall of the fixed cylinder, and 4 holes which respectively correspond to the 4 rectangular holes of the fixed cylinder are formed in the side wall of the rotary cylinder; the inner wall of the rotary cylinder is welded with a central shaft through a flat steel bracket II, the central shaft penetrates through the steel plate of the end face at the bottom of the air regulating valve and is fixedly connected with an air regulating valve handle, the air regulating valve handle is connected with a limiting ratchet mechanism, and the limiting ratchet mechanism is fixed outside the steel plate of the end face at the bottom of the air regulating valve.
Further, a guide sleeve is arranged in the air regulating valve, and the gas gun penetrates through the guide sleeve.
Further, the ignition hole of the steel plate at the bottom end face of the air regulating valve is connected with the ignition cylinder in a welding way, and the viewing hole of the steel plate at the bottom end face of the air regulating valve is connected with the viewing cylinder in a welding way.
Further, the annular steam drum pipe is provided with a flange plate, and the flange plate is fixedly connected with a flange surface corresponding to the steel plate on the end surface of the bottom of the air regulating valve through bolts.
Further, the nozzle is connected with the gun barrel through pipe threads or welding.
The invention has the beneficial effects that:
(1) The invention realizes the secondary fuel gas staged combustion through the spray holes on the fuel gas gun, the primary fuel is ignited circularly, the ignition is reliable, the combustion is uniform and stable, the combustion is full, the efficiency is high, CO and other combustible substances are hardly generated in the fuel gas, and the invention is suitable for petrochemical heating furnaces with low load and low hearth temperature operation conditions;
(2) The stable swirl annular flame area is generated by the primary fuel combustion, a plurality of gas gun nozzles and the root parts of the secondary fuel gas are heated and ignited, and the primary combustion is stably combusted in the special structure of the edge mouth of the end part of the fire pot brick, so that the combustion stability of the primary fire of the secondary combustion is ensured, the secondary combustion is not released, the flame is rigid and powerful, the secondary flame combustion process can be designed and controlled by changing the injection speed, the injection angle, the size of the injection hole and the like, the flame temperature is reasonably controlled, and the thermal NO is inhibited X Generates and thereby reaches ultra-low NO X The purpose of combustion emission;
(3) Through the porous air inlet of air regulating valve axial, adopt structures such as fire basin brick, stand pipe to combustion air stationary flow, be favorable to combustion air evenly to spray out fire basin brick mouth, obtain more stable burning flame, be unlikely to the drift to influence the burning temperature field and cause serious inhomogeneous, prevent the risk of unburnt under the low load, improved combustion efficiency, reached energy-efficient purpose.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an odd cycle priming high efficiency energy efficient ultra low NO according to an embodiment of the invention X A cross-sectional view of a front view of the gas burner;
FIG. 2 is a schematic illustration of an embodiment of the invention odd number circulation ignition high-efficiency energy-saving ultralow NO X A top view of the gas burner;
FIG. 3 is an odd cycle priming high efficiency energy efficient ultra low NO according to an embodiment of the invention X A bottom view of the gas burner;
FIG. 4 is a top view of a firebowl brick;
FIG. 5 is a schematic view of the structure of the rotary drum;
FIG. 6 is an expanded view of the rotary drum;
FIG. 7 is a schematic view of the structure of the stationary barrel;
FIG. 8 is an expanded view of the stationary barrel;
in the figure: 1. the fire-fighting gas burner comprises a guide pipe, 2, a fire basin brick, 3, a gas gun and an annular steam drum component thereof, 4, a pilot lamp, 5, a cylinder, 6, a wind regulating valve, 7, a rotary cylinder, 8, a fixed cylinder, 9, a fire viewing cylinder, 10, an ignition cylinder, 11, a wind regulating valve handle, 12, a pilot lamp gas hose, 13 and a main gas hose.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in figures 1-8, the odd cycle ignition high-efficiency energy-saving ultralow NO provided by the embodiment of the invention X The gas burner comprises a cylinder body 5, wherein the cylinder body 5 is of a hollow cylinder structure and is rolled by a steel plate, the cylinder body 5 is provided with an upper flange, the upper flange is fixedly connected with a bottom plate or a side wall plate of a heating furnace in a bolt or welding mode, an annular brick supporting plate is arranged on the end face of the top of the cylinder body 5 and is used for supporting a fire basin brick, and a plurality of round holes are formed in the annular brick supporting plate corresponding to the position of a gas gun barrel. The upper end face of the brick supporting plate is welded with a brick fixing sleeve, and the brick fixing sleeve is formed by rolling a steel plate and is mainly used for fixing the position of the fire pan brick 2. The fire basin brick 2 is horizontally placed on the brick supporting plate and is fixed by the brick fixing sleeve, a guide pipe 1 is arranged in the fire basin brick 2, and the bottom end plate of the guide pipe 1 is fixedly connected with the cylinder 5 through a flat steel bracket I; the bottom end surface of the cylinder body 5 is fixedly connected with a blast regulator 6, and the blast regulator 6 is used for regulating the supply quantity of combustion air under different loads.
The gas gun and the annular steam drum assembly (3) thereof are arranged in the cylinder body 5, the gas gun and the annular steam drum assembly 3 thereof are fixedly connected with a steel plate on the bottom end face of the air regulating valve 6 through flange bolts, the top of the gas gun and the annular steam drum assembly 3 thereof pass through the air regulating valve 6 and the cylinder body 5 to reach corresponding grooves on the port of the fire pan brick 2, and the gas gun and the annular steam drum assembly 3 thereof are connected with a gas pipeline related to a heating furnace through a main gas hose 13 so as to convey fuel gas for combustion of a burner.
The utility model discloses a fire pan brick, including barrel 5, pilot burner 4, flange bolt, blast gate 6, fire pan brick 2, pilot burner 4, flange bolt, blast gate 6, blast gate 4, blast gate 6 and fire pan brick 2 are passed to the bottom of 4 through flange bolt and the bottom terminal surface steel sheet fixed connection of blast gate 6, the top of pilot burner 4 is passed blast gate 6 with barrel 5 arrives in the fire pan brick 2, pilot burner 4 is connected with the relevant gas line of heating furnace through pilot burner gas hose 12.
The combustion-supporting air inlet on the side surface of the air regulating valve 6 is welded with the square tube, the square pipe is connected with an air duct of an air supply system of the heating furnace through a flange nipple so as to convey combustion-supporting air to be supplied to a burner for burning. The bottom end face of the air regulating valve 6 is sealed with a steel plate, and the steel plate of the bottom end face of the air regulating valve 6 is provided with an ignition hole, a fire hole, a reserved hole for mounting the pilot burner 4, the gas gun and the annular steam drum assembly 3 thereof and corresponding flange bolt holes.
The gas gun and the annular steam drum assembly 3 thereof comprise gas guns, the gas guns are connected with the annular steam drum pipe in a welding way, the number of the gas guns is 9, the number of grooves arranged at the outlet of the fire pan brick 2 is equal to that of the gas guns, and the gas guns are uniformly distributed in the wall of the fire pan brick 2 by taking the center of the cylinder 5 as the center according to the circumference; the gas gun comprises a gun barrel which is fixedly connected with the nozzle, and the gun barrel penetrates through a reserved hole of a steel plate at the bottom end face of the air regulating valve 6, and reserved round holes of the cylinder 5 and the fire pot brick 2; the spherical surface of the nozzle head is provided with a first-stage gas spray hole and a second-stage fuel gas spray hole, the first-stage gas spray hole faces towards the non-adjacent other gas gun, the second-stage fuel gas spray hole faces right above the center of the fire basin brick 2, and the second-stage fuel gas is sprayed to the upper center of the fire basin brick 2 according to an angle with the vertical direction of beta.
The fire basin brick 2 is of a hollow cylindrical structure and made of refractory materials, the cylinder wall has a certain thickness, the inside of the fire basin brick is mainly provided with a combustion air channel, the outer wall surface of the fire basin brick 2 is a straight cylinder, the inner wall of the fire basin brick 2 is divided into 4 sections, a cone section shrinkage section, a straight section, a cone section flaring section and an upper groove section are sequentially arranged from bottom to top, 9 square grooves (approximate) are formed in the upper groove section, trapezoid bosses (approximate) are arranged between the grooves, reserved round holes for the gas guns to pass through are formed below the grooves, the inner diameter of the upper groove section is larger than the inner diameter of the cone section flaring section, the trapezoid boss inner diameter is slightly larger than the cone section flaring section diameter, so that an annular end surface area for stable combustion of primary flame and tangential rotation ignition is formed between each boss or groove, the gas guns are positioned between the bosses because the grooves and the boss are much higher than the annular end surface flame area, primary fuel gas guns are separated from each gas gun in a horizontal overlook direction, and form a circular included angle with the gas guns respectively when the primary fuel guns are in a circle. The multiple primary fuels are sprayed in the same clockwise direction to form rotary fuel gas flow, and the centrifugal fuel gas flow is mixed with combustion air at the port and limited in the fire basin brick by the boss and the groove to burn and form primary swirl combustion flame.
The bottom end face of the cylinder body 5 is provided with a lower flange which is fixedly connected with a flange annular plate arranged on the upper end face of the air regulating valve 6 through flange bolts;
the upper part of the inner wall of the cylinder body 5 is welded with the first flat steel bracket, and the central position of the first flat steel bracket is welded with a bolt and is used for fixing and supporting the guide pipe 1; the guide pipe 1 comprises a round pipe, the round pipe is welded with a bottom end plate, a threaded hole corresponding to the specification of a bolt on the flat steel support I is formed in the center of the bottom end plate, and when the guide pipe is installed, the guide pipe is directly screwed, so that the guide pipe is fixed at the center of a fire pan.
The inner wall of the cylinder body 5 is provided with a heat preservation and insulation layer, and the inner side of the heat preservation and insulation layer is provided with a lining protection steel wire mesh.
The shell of the air regulating valve 6 is of a cylindrical hollow structure, the inner wall of the air regulating valve 6 is provided with a heat preservation and insulation layer, and the inner side of the heat preservation and insulation layer is provided with a lining protection steel wire mesh.
The inside of the air regulating valve 6 is provided with a fixed cylinder 8, the upper port of the fixed cylinder 8 is welded and connected with a flange annular plate of the upper end face of the air regulating valve 6, and the lower port of the fixed cylinder 8 is welded and connected with the inner wall of a heat preservation and insulation layer of the bottom end face of the air regulating valve 6, so that an annular channel is formed between the fixed cylinder and the inner wall of the heat preservation and insulation layer of the air regulating valve for the passage of combustion-supporting air; a rotary cylinder 7 is arranged in the fixed cylinder 8, the rotary cylinder 7 and the fixed cylinder 8 are both thin-wall cylinders, 4 rectangular holes which are uniformly distributed are formed in the side wall of the fixed cylinder 8, and 4 holes which respectively correspond to the 4 rectangular holes of the fixed cylinder 8 are formed in the side wall of the rotary cylinder 7; the inner wall of the rotary cylinder 7 is welded with a central shaft through a flat steel bracket II, the central shaft penetrates through a steel plate at the bottom end face of the air regulating valve 6 and is fixedly connected with an air regulating valve handle 11, the air regulating valve handle 11 is connected with a limiting ratchet mechanism, and the limiting ratchet mechanism is fixed outside the steel plate at the bottom end face of the air regulating valve 6. The air valve handle 11 can be adjusted and fixed within the range of 0-90 degrees. Through rotating the blast gate handle 11, the rotary drum rotates, and then the trompil relative position on rotary drum and the fixed section of thick bamboo changes, and then the cross-sectional area of ventilation changes to reach the effect of adjusting the combustion-supporting air volume.
A guide sleeve is arranged in the air regulating valve 6, and the gas gun passes through the guide sleeve.
The ignition hole of the steel plate at the bottom end surface of the air regulating valve 6 is welded with the ignition cylinder 10, the fire viewing hole of the steel plate at the bottom end surface of the air regulating valve 6 is welded with the fire viewing cylinder 9, the ignition cylinder 10 is used for inserting an ignition rod during manual ignition, and the fire viewing cylinder 9 is used for observing flames.
The annular steam-wrapped pipe is provided with a flange plate, the flange plate is fixedly connected with a flange surface corresponding to the end surface steel plate at the bottom of the air regulating valve 6 through bolts, the annular steam-wrapped pipe is used for uniformly distributing fuel gas to each fuel gas gun, the annular steam-wrapped pipe is provided with a fuel gas interface, the annular steam-wrapped pipe is communicated with a fuel gas pipeline of a heating furnace system through a main fuel gas hose, and the main fuel gas hose is a metal hose.
The nozzle is connected with the gun barrel through pipe threads or welding.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
When the gas burner is specifically used, the classification of the first-stage fuel gas and the second-stage fuel gas is realized through the spray holes on the plurality of gas gun nozzles arranged in the edge of the fire pan brick, the pilot burner is ignited by the manual ignition from the ignition hole, the flame of the pilot burner ignites the first-stage fuel gas, the first-stage fuel gas is horizontally sprayed to the next corresponding gas gun which is not adjacent to the pilot burner along the tangential direction, the first-stage fuel gas of the next gas gun is also sprayed to the next corresponding gas gun which is not adjacent to the next corresponding gas gun according to the same way, and the like, so that a cycle is formed, the track of the cycle forms an odd-numbered multi-star pattern, and annular first-stage swirl fuel flame burns at the fire pan brick opening, heats the gas gun nozzles and the second-stage main fuel gas, and ignites the second-stage main fuel gas. The secondary flame of the multiple gas guns is sprayed obliquely above the center of the fire basin brick, is ignited after being sprayed out of the spray holes, and continuously burns after being sprayed until the fire basin brick is completely burnt. In the ascending process of the center of the inclined fire basin brick, the inner side of the inclined fire basin brick contacts, mixes and diffuses combustion air, the outer side of the inclined fire basin brick contacts, mixes and diffuses hearth flue gas, and the gas composition of each area is similar to an annular gradual concentration distribution rule, namely the area which is from the inner side to the outer side and has the oxygen content of about 20.95% until the oxygen content of the outer layer is less than 3% is continuously combusted until the combustion conditions are fully mixed and combusted completely. The primary fuel gas strength, the secondary fuel gas mixing strength, the combustion strength and the like can be controlled through design, for example, the distribution proportion of the primary fuel gas and the secondary fuel gas, the jet orifice spraying speed, the secondary fuel gas jet orifice angle and the like are changed, so that ideal stage combustion can be obtained, flame temperature control is facilitated, and NOx generation and CO control are inhibited.
Because the odd gas guns are annularly arranged on the circumference of the fire pot brick mouth, a stable flame stabilizing area for circumferential rotary jet combustion is formed at the fire pot brick mouth, the temperature field is relatively uniform, and the flame stabilizing effect is good. The secondary fuel gas sprayed by each air gun nozzle is heated and ignited, the secondary fuel gas is sprayed to the upper space of the center of the fire pot, and a plurality of fuel gases are combusted to form a stable and round-like flame.
In order to ensure that the speed of combustion air in the fire pot is uniform and the flow is not deviated, a circumferential air inlet, rotary drum and fixed drum air regulating valve form is adopted, and the superposition of a plurality of air inlets reserved on the wall of the rotary drum (valve core) and the fixed drum is changed through the relative position change of the rotary drum and the fixed drum, so that the required accessible area is obtained to control and regulate the air quantity.
Combustion-supporting air enters from the inlet square tube flange nipple inlet, passes through an annular channel between the fixed sleeve and the inner wall of the air regulating valve shell, passes through square holes above the fixed sleeve and holes on the rotary sleeve, very uniformly enters the air regulating valve, upwards advances into the burner cylinder, and then is ejected out of the fire basin brick after being subjected to steady flow and speed increase through the fire basin brick and the guide tube, so as to be used for primary combustion and secondary combustion.
Because the primary fuel gas rotates to ignite and stabilize flame and the uniform combustion-supporting air is supplied, the combustion is very stable, and the injection angle of the secondary fuel is designedThe mixing intensity of the secondary fuel gas and the combustion intensity of each stage can be controlled to control the proper flame temperature, thereby effectively inhibiting the thermal NO X The generated combustible material is also completely combusted, the combustion efficiency is high, and the high-efficiency energy-saving low NO is realized X For discharging purpose, NO in flue gas X The discharge concentration can be reduced to 40mg/Nm 3 The CO emission concentration was 5 mg/Nm 3 The following is given.
In summary, by means of the technical scheme, the secondary fuel gas is combusted in a grading way through the spray holes on the fuel gas gun, the primary fuel is ignited in a circulating way, the ignition is reliable, the combustion is uniform and stable, the combustion is full, the efficiency is high, CO and other combustible substances are hardly generated in the fuel gas, and the method is suitable for a petrochemical heating furnace with low-load and low-hearth temperature operation working conditions.
The odd number aims at spraying the fuel to the next fuel gun which is not adjacent to the first-stage fuel when the first-stage fuel is ignited, and the final ignition spraying route is analogically performed to form a cycle, so that stable first-stage rotary flame is favorable for obtaining. The number of the gas guns can be selected according to the load of the burner, but the structural characteristics of the invention are adopted, such as the number of the gas guns is changed, for example, even number, 6, 8, 10 and 12 guns are adopted, and the rest structures accord with the patent and are regarded as infringement of the patent. The number of odd gas guns described herein is only one of the preferred embodiments.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. Odd number circulation ignition high-efficiency energy-saving ultralow NO X The gas burner comprises a cylinder body (5), wherein a brick supporting plate is arranged on the top end face of the cylinder body (5), the upper end face of the brick supporting plate is fixedly connected with a brick fixing sleeve, and a fire pan brick (2) is arranged on the brick supporting plate and fixed by the brick fixing sleeve, and is characterized in that:
a guide pipe (1) is arranged in the fire basin brick (2), and the guide pipe (1) is fixedly connected with the cylinder body (5) through a flat steel bracket I; the bottom end surface of the cylinder body (5) is fixedly connected with the air regulating valve (6);
the gas gun and the annular steam pocket assembly (3) thereof are arranged in the cylinder (5), the gas gun and the annular steam pocket assembly (3) thereof are fixedly connected with a steel plate at the bottom end face of the air regulating valve (6), the top of the gas gun and the annular steam pocket assembly (3) thereof passes through the air regulating valve (6) and the cylinder (5) to reach the inside of the fire pan brick (2), and the gas gun and the annular steam pocket assembly (3) thereof are connected with a gas pipeline related to the heating furnace through a main gas hose (13);
a pilot burner (4) is arranged in the cylinder (5), the bottom of the pilot burner (4) is fixedly connected with a steel plate at the end face of the bottom of the air valve (6), the top of the pilot burner (4) passes through the air valve (6) and the cylinder (5) to reach the fire basin brick (2), and the pilot burner (4) is connected with a gas pipeline related to a heating furnace through a pilot burner gas hose (12);
the combustion-supporting air inlet of the side face of the air regulating valve (6) is welded with a square pipe, the square pipe is connected with an air duct of an air supply system of the heating furnace through a flange nipple, and an ignition hole, a fire-viewing hole, a reserved hole for installing the pilot burner (4) and the gas gun and an annular steam drum assembly (3) thereof and corresponding flange bolt holes are formed in a steel plate on the bottom end face of the air regulating valve (6);
the fire basin brick (2) is of a hollow cylindrical structure, the outer wall surface of the fire basin brick (2) is a straight cylinder, the inner wall of the fire basin brick (2) is divided into 4 sections, a cone section necking section, a straight section, a cone section flaring section and an upper groove section are sequentially arranged from bottom to top, the upper groove section is provided with a plurality of square grooves, a reserved round hole is arranged below the grooves, and the inner diameter of the upper groove section is larger than that of the cone section flaring section;
the gas gun and the annular steam drum assembly (3) thereof comprise gas guns, the gas guns are connected with the annular steam drum pipe in a welding way, the number of the gas guns is an odd number, and the gas guns are uniformly distributed in the wall of the fire pot brick (2) according to the circumference by taking the center of the cylinder body (5) as the center; the gas gun comprises a gun barrel, the gun barrel is fixedly connected with a nozzle, and the gun barrel penetrates through a reserved hole of a steel plate at the bottom end face of the air regulating valve (6), and reserved round holes of the cylinder (5) and the fire pot brick (2); the spherical surface of the nozzle head is provided with a first-stage gas spray hole and a second-stage fuel gas spray hole, the first-stage gas spray hole faces towards the non-adjacent other gas gun, and the second-stage fuel gas spray hole faces right above the center of the fire pot brick (2).
2. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that a lower flange is arranged on the end face of the bottom of the cylinder body (5), and the lower flange is fixedly connected with a flange annular plate arranged on the upper end face of the air regulating valve (6) through flange bolts.
3. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that the upper part of the inner wall of the cylinder (5) is fixedly connected with the first flat steel bracket, and the center of the first flat steel bracket is connected with a bolt; the guide pipe (1) comprises a round pipe, the round pipe is welded with a bottom end plate, the bottom end plate is provided with a threaded hole corresponding to the specification of a bolt on the first flat steel support, and the bottom end plate is fixedly connected with the first flat steel support through the bolt.
4. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that a heat preservation and insulation layer and a lining protection steel wire mesh are arranged on the inner wall of the cylinder (5).
5. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that the shell of the air regulating valve (6) is of a cylindrical hollow structure, and a heat preservation and insulation layer and a lining protection steel wire mesh are arranged on the inner wall of the air regulating valve (6).
6. A according to claim 5Odd number circulation ignition high-efficiency energy-saving ultralow NO X The gas burner is characterized in that a fixed cylinder (8) is arranged in the air regulating valve (6), the upper port of the fixed cylinder (8) is welded and connected with a flange annular plate of the upper end face of the air regulating valve (6), and the lower port of the fixed cylinder (8) is welded and connected with the inner wall of a heat-insulating layer of the bottom end face of the air regulating valve (6); a rotary cylinder (7) is arranged in the fixed cylinder (8), the rotary cylinder (7) and the fixed cylinder (8) are thin-wall cylinders, 4 rectangular holes which are uniformly distributed are formed in the side wall of the fixed cylinder (8), and 4 holes which correspond to the 4 rectangular holes of the fixed cylinder (8) respectively are formed in the side wall of the rotary cylinder (7); the inner wall of the rotary cylinder (7) is welded with a central shaft through a flat steel support II, the central shaft penetrates through a steel plate on the bottom end face of the air regulating valve (6) and is fixedly connected with an air regulating valve handle (11), the air regulating valve handle (11) is connected with a limiting ratchet mechanism, and the limiting ratchet mechanism is fixed outside the steel plate on the bottom end face of the air regulating valve (6).
7. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that a guide sleeve is arranged in the air regulating valve (6), and the gas gun passes through the guide sleeve.
8. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that an ignition hole of the steel plate at the bottom end surface of the air regulating valve (6) is welded with the ignition cylinder (10), and a viewing hole of the steel plate at the bottom end surface of the air regulating valve (6) is welded with the fire viewing cylinder (9).
9. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that the annular steam-wrapped pipe is provided with a flange plate, and the flange plate is fixedly connected with a flange surface corresponding to a steel plate at the bottom end surface of the air regulating valve (6) through bolts.
10. An odd cycle ignition high efficiency energy saving ultra low NO according to claim 1 X The gas burner is characterized in that the nozzle is connected with the gun barrel through pipe threads or welding.
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| CN201810842999.2A CN108895446B (en) | 2018-07-27 | 2018-07-27 | Odd number circulation ignition high-efficiency energy-saving ultralow NO X Gas burner |
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| CN201810842999.2A CN108895446B (en) | 2018-07-27 | 2018-07-27 | Odd number circulation ignition high-efficiency energy-saving ultralow NO X Gas burner |
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