CN114574646A - Multi-rotational-flow column-flow low-nitrogen top-combustion type burner for hot blast stove - Google Patents
Multi-rotational-flow column-flow low-nitrogen top-combustion type burner for hot blast stove Download PDFInfo
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- CN114574646A CN114574646A CN202210252543.7A CN202210252543A CN114574646A CN 114574646 A CN114574646 A CN 114574646A CN 202210252543 A CN202210252543 A CN 202210252543A CN 114574646 A CN114574646 A CN 114574646A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/02—Brick hot-blast stoves
- C21B9/04—Brick hot-blast stoves with combustion shaft
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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
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Abstract
The invention relates to a burner for a multi-rotational-flow columnar-flow low-nitrogen top-combustion type hot blast stove, which effectively solves the problems of preventing a hot blast outlet from collapsing, corroding and cracking, improving the production efficiency and prolonging the service life. The upper part of the side wall of the wall body of the burner is provided with an air inlet pipe, a gas inlet pipe and an air inlet pipe, a gas loop is arranged in the middle of the wall body of the burner, the air loop is respectively arranged on the upper side and the lower side of the gas loop to form a three-loop structure, the upper part and the lower part of the air loop are respectively and alternately provided with an air channel, the gas loop is sequentially and alternately provided with four gas channels from top to bottom, the air channels and the gas channels are communicated with a first row of nozzles and a second row of nozzles through mixing channels, an air ascending pipeline and the gas channels are communicated with a third row of nozzles and a fourth row of nozzles through mixing channels, and the four rows of nozzles form a nozzle short-flame flameless vertically staggered four-row multi-swirl multi-angle wide-flow-field jet structure. The invention has high production efficiency and long service life.
Description
Technical Field
The invention relates to a burner, in particular to a burner for a multi-rotational-flow columnar flow low-nitrogen top-combustion type hot blast stove.
Background
The burner is a necessary device for a hot blast stove in industrial production, the prior popular Carlukin top combustion hot blast stove and a simulated Carlukin top combustion hot blast stove adopt a small precombustion chamber bowling ball structure, the burner is arranged at the top of a conical vault and is independently supported on a stove shell, the conical vault is independently supported on the stove shell, a hot air outlet structure is arranged at the position of the conical vault, two rows of gas spray holes and two rows of air spray holes are arranged in the burner structure (the small blast stove is matched with the hot blast stove and is provided with two rows of spray holes, one row of gas spray holes and one row of air spray holes), the spray hole swirl angles of the burners of all kinds of swirl top combustion hot blast stoves are all arranged at 25 degrees so as to form the effect of swirl reinforced premixing, and due to the problems existing on the burner structure, the arrangement forms a premixing long flame combustion mode, and a sufficient mixed combustion space of the precombustion chamber and the combustion chamber is required to realize complete combustion, the hot blast stove is called as a premixed swirl long flame combustion technology, the air excess coefficient is more than 1.1, the nitrogen oxides are discharged between 100 and 300 milligrams, and a hot blast outlet and a vault built above the hot blast outlet are easy to collapse, so that the air temperature and the benefit are influenced.
At present, some domestic enterprises such as willow steel, Wuhan institute of institute, politics, segmented core, Jinxingda, Zhongsmelt Siedi, Yuxing and the like produce top-burning hot blast stoves which adopt a small combustion chamber bowling structure, the burners for the hot blast stoves are divided into two types according to the position of hot blast outlets, one type is that the hot blast outlets are arranged in the small combustion chamber structure at the top, the small combustion chamber is arranged at the top of a conical vault of a regenerator and is independently supported on the furnace shell, the conical vault chamber at the lower part of the small combustion chamber is independently supported on the furnace shell, and the conical vault part is provided with the hot blast outlet structure such as the products of the willow steel, segmented core and Wuhan institute of institute (the willow steel and the segmented core hot blast outlets are arranged on the side wall of the combustion chamber at the top); the other type is a structure that a hot air outlet is arranged on the side wall at the upper part of the regenerative chamber and the lower part of the conical vault, such as a political science, Jinxingda, Zhongmei Sedi and Yuxing top-combustion type hot blast stove. However, no matter the first type or the second type, the burner nozzle structures for the two types of hot blast stoves are respectively provided with a row of short flame or flameless mixed burners, the burners are all arranged at a rotary cutting angle of 25 degrees so as to form the functions of uniformly distributing a swirl enhanced flow field and stabilizing flame, the combustion flames formed by the arrangement are all flameless or short flames, and the air excess coefficient is generally in a state of 1.05-1.06. The burners for the hot blast stove all belong to flameless or short flame mixed combustion. The nozzle structure for realizing mixed ignition combustion in the deep part of the gas and air nozzle is called a flameless combustion structure, and the air excess coefficient of the flameless combustion technology is less than about 1.02; no matter the combustor is short-flame or flameless combustion, the combustor or the regenerator is not required to have larger space, and the technical requirements of high efficiency and high air temperature can be met. Compared with the long flame, flameless and short flame technologies, the flameless mixed combustion is better, safer and more uniform; in the short flame combustion technology, some coal gas still exists in the mixed combustion flame at the nozzle and is not burnt out.
The short flame is formed by mixing and burning coal gas and air at a nozzle; the flameless gas is formed by mixing and igniting coal gas and air in the deep part of the nozzle. Long-term practice proves that the state of a nozzle of a burner is not damaged in the mixed combustion process of the top combustion type hot blast stove adopting short flame or flameless mixed combustion, and the knocking is proved to be avoided; the practice of the hot blast stove with premixed long flame rotational flow proves that the phenomena of peeling, breaking, displacement and the like of a gas nozzle are serious in 100 percent, and the phenomenon of detonation combustion exists at the same time.
Because the traditional top combustion type hot air outlet is usually arranged at the bottom of the conical vault with the largest diameter and the most concentrated material resistance stress, the damage rate is more than 90 percent under the actions of 3000-7000 tons of blind plate force, the material resistance expansion stress of silica bricks and the ten thousand tons of stress formed by limited and incapable expansion, the working efficiency and the service life of the hot blast stove are seriously influenced, and therefore, the improvement and innovation on the combustor are imperative.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the invention aims to provide a burner for a multi-cyclone column flow low-nitrogen top-combustion type hot blast stove, which can effectively solve the problems of preventing the collapse, corrosion and cracking of a hot blast outlet, improving the production efficiency and prolonging the service life.
The technical scheme of the invention is that the burner for the multi-rotational flow columnar flow low-nitrogen top-combustion type hot blast stove comprises a burner body, an upper air inlet pipe, a gas inlet pipe and a lower air inlet pipe are arranged at the upper part of the side wall of the burner wall body, a gas loop, a first air loop and a second air loop which are arranged at intervals from top to bottom are arranged in the burner wall body, the gas loop is arranged at the middle part of the burner wall body, the first air loop and the second air loop are respectively arranged at the upper side and the lower side of the gas loop to form a three-loop structure, a first air channel and a second air channel are respectively and alternately arranged at the upper part and the lower part of the first air loop, the first gas channel, the second gas channel, the third gas channel and the fourth gas channel are sequentially and alternately arranged from top to bottom of the gas loop, the first gas channel and the third gas channel are in a vertical space, the second gas channel and the fourth gas channel are in a vertical space, the upper part of the lower air inlet pipe is alternately and respectively provided with a first air ascending pipeline and a second air ascending pipeline, the first air channel and the first gas channel are communicated with the first row of nozzles through a first mixing channel, the second air channel and the second gas channel are communicated with the second row of nozzles through a second mixing channel, the first air ascending pipeline and the third gas channel are communicated with the third row of nozzles through a third mixing channel, the second air ascending pipeline and the fourth gas channel are communicated with the fourth row of nozzles through a fourth mixing channel, and the first row of nozzles, the second row of nozzles and the fourth row of nozzles form a nozzle short-flame flameless vertically-staggered four-row multi-swirl multi-angle wide-flow field structure.
The invention has novel and unique structure, easy production and manufacture, is a great innovation on the structure of the existing hot blast stove, fully applies the technology of combining flameless, short-flame, high-power and multi-swirl columnar flow with combustion flow field to the structure of the invention, can effectively prevent the gas nozzle from falling off, breaking and shifting, prevents the phenomenon of detonation combustion, has high production efficiency and long service life, and has great economic and social benefits.
Drawings
FIG. 1 is a cross-sectional front view of the present invention.
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention.
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention.
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1 in accordance with the present invention.
FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1 in accordance with the present invention.
FIG. 6 is a cross-sectional view taken along line E-E of FIG. 1 in accordance with the present invention.
FIG. 7 is a sectional view taken along line F-F of FIG. 1 in accordance with the present invention.
FIG. 8 is a sectional view taken along line H-H of FIG. 1 in accordance with the present invention.
FIG. 9 is a sectional view taken along line G-G of FIG. 1 in accordance with the present invention.
FIG. 10 is a sectional front view (a furnace body is a partial view) of the present invention in use.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in figures 1-8, the burner for the multi-rotational flow columnar flow low-nitrogen top-combustion type hot blast stove comprises a burner body, an upper air inlet pipe 10-1, a middle gas inlet pipe 10-2 and a lower air inlet pipe 10-3 are arranged on the upper portion of the side wall of a burner 2 wall, a gas loop 9-2, a first air loop 9-1 and a second air loop 9-3 which are arranged on the upper portion and the lower portion of the burner 2 wall and are separated from each other are arranged in the burner 2 wall, the gas loop 9-2 is arranged in the middle of the burner 2 wall, the first air loop 9-1 and the second air loop 9-3 are respectively arranged on the upper side and the lower side of the gas loop 9-2 to form a three-loop structure, a first air channel 16-1 and a second air channel 16-2 are respectively and alternately arranged on the upper portion and the lower portion of the first air loop 9-1, the gas loop 9-2 is provided with a first gas channel 17-1, a second gas channel 17-2, a third gas channel 17-3 and a fourth gas channel 17-4 in turn from top to bottom, the first gas channel 17-1 and the third gas channel 17-3 are arranged in a vertical space, the second gas channel 17-2 and the fourth gas channel 17-4 are arranged in a vertical space, the upper part of the lower air inlet pipe 10-3 is alternately provided with a first air ascending pipeline 18-1 and a second air ascending pipeline 18-2 respectively, the first air channel 16-1 and the first gas channel 17-1 are communicated with the first row of nozzles 11 through a first mixing channel 19-1, the second air channel 16-2 and the second gas channel 17-2 are communicated with the second row of nozzles 12 through a second mixing channel 15-1, the first air ascending pipeline 18-1 and the third gas channel 17-3 are communicated with the third row of nozzles 13 through a third mixing channel 19-2, the second air ascending pipeline 18-2 and the fourth gas channel 17-4 are communicated with the fourth row of nozzles 14 through a fourth mixing channel 15-2, and the first row of nozzles 11, the second row of nozzles 12, the third row of nozzles 13 and the fourth row of nozzles 14 form a nozzle short flame flameless vertically staggered four-row multi-swirl multi-angle wide flow field jet flow structure.
In order to ensure the using effect and convenient use, the speed of the first row of nozzles 11 is higher than that of the second row of nozzles 12, so that the sectional area of the column flow cannot be too large, the second row of nozzles 12 is higher than that of the third row of nozzles 13 and is lower than that of the first row of nozzles 11, the column flow is easy to rotate around, but a larger centrifugal force cannot be formed, so that the column is expanded, and the controllable range of the pitted surface of the column flow is limited; the flow velocity of the third row of nozzles 13 is smaller than that of the second row of nozzles 12, so that the rotational flow does not affect the rotational flow of the third row of nozzles 13, the effect is too small to cause the rotational flow to wind and mix in the rotational flow of the second row of nozzles 12, the periphery of the rotational flow of the third row of nozzles 13 affects the flow field distribution of all pitted surfaces, and the third row of nozzles 13 are lower.
The first row of nozzles 11 are columnar flow injection, the second row of nozzles 12 are provided with 5-15-degree included angles, the third row of nozzles 13 are provided with 15-25-degree included angles, and the fourth row of nozzles 14 are provided with 25-35-degree included angles.
The flow of the smokeless flow of the first row of columnar flow injection burners 11 and the second row of swirl 5-15-degree burners 12 is higher than that of the first row of columnar flow injection burners 11 and the third row of swirl 15-25-degree burners 13 under the condition that the gas flow and the air flow are the same, so that the uniformity and stability of the swirl-induced flow field are ensured.
The lower part of the burner body 2 is supported outside the upper part of the independent vault 4 through a supporting plate 5, and the lower part of the independent vault 4 is supported outside the upper part of the furnace body through a furnace shell supporting plate 6;
a hot air outlet pipe 8 communicated with a combustion chamber in the combustor 2 is arranged below the three-ring structure on the wall body of the combustor 2, and the lower part of the hot air outlet pipe is flush with the small-diameter phi 1 part at the upper part of the independent vault 4;
the first row of columnar flow injection burners 11 are cylindrical injection channels, and form a columnar flow injection burner structure;
it should be noted that the technical core of the invention lies in the structure of the burner, and the installation position of the hot air outlet pipe 8 can also be arranged on the outer wall of the independent vault 4 according to the actual situation of the existing hot blast stove, so that the burner of the invention is suitable for the existing hot blast stove, when the conical vault of the hot blast stove is cut half, the hot air outlet can not be cut, and then the burner is arranged at the upper part, so that the burner is suitable for the reformation of the existing stove.
The above description is given for the purpose of illustrating specific embodiments of the present invention and is not intended to limit the scope of the present invention, and all technical solutions substantially identical to the technical solutions of the present invention, which are made by equivalent, or alternative means, belong to the scope of the present invention.
In specific implementation, the inlet of a first mixing channel 19-1 of the upper first row of columnar flow injection burners 11 is respectively communicated with the outlet of a first gas channel 17-1 through a descending first air channel 16-1, and the inlet of a second mixing channel 15-1 of the lower second row of swirl nozzles 12 with the angle of 5-15 degrees is respectively communicated with a second air ascending pipeline 18-2 of a second air loop 9-3 communicated with a second air inlet pipe 16-3 through a descending third gas channel 17-3.
When the invention is used, the burner body 2 is supported outside the upper part of the independent vault 4 through the supporting plate 5, the lower part of the independent vault 4 is supported outside the upper part of the furnace body through the furnace shell supporting plate 6, the burner vault 1 is arranged on the upper part of the burner body 2, the burner vault 1, the burner body 2 and the independent vault 4 are concentrically connected into a whole, the formed internal space is a combustion chamber 7, the lower part of the independent vault 4 is supported outside the upper part of the furnace body 3 through the furnace shell supporting plate 6, the furnace body forms a heat storage chamber, and the heat storage chamber is internally provided with heat storage body checker bricks 20 (shown in figure 2).
As is clear from the above structure, the present invention employs:
1. the long-term practice proves that the state of a nozzle of a burner is not damaged in the mixed combustion process of a top combustion type hot blast stove adopting short-flame and flameless mixed combustion, and the condition proves that the burner does not knock; the practice of the premixed long flame cyclone hot blast stove proves that 100 percent of the premixed long flame cyclone hot blast stove has serious phenomena of peeling, fracture, displacement and the like of a gas nozzle, has a detonation combustion phenomenon, can well place gas with high density at the middle end of air, solves the problem of uniform distribution of air in explosion suppression, and can expel residual gas in a gas loop with high density and swept by nitrogen out of the loop from the top, and can also enable the air with the upper part opened to downwards or forcibly mix and combust the expelled gas pressure, so that the damage of detonation to a burner structure is avoided, the structure of a combustion chamber is stable and synchronous with a heat storage chamber, and obviously, the premixed long flame cyclone hot blast stove has long service life and high working efficiency.
2. The four rows of multi-rotational flow multi-angle multi-wide flow field distribution nozzle structures (the first row of nozzles are short flame injection nozzle structures which are not provided with angles and are opposite to the axial center for injection, the arrangement aims at filling up the uneven swirl flow field formed by rotational flow, the columnar flow nozzles are operated and distributed from top to bottom and are opposite to a swirl region after flame injection, the uneven local flow field distribution caused by the swirl is compensated, the second row of nozzles are provided with rotational angles of 5-15 degrees and adopt a flameless combustion mode to form a checker brick bed surface flow field corresponding to radiation of 5-15 degrees, the third row of nozzles are provided with rotational angles of 15-25 degrees and adopt short flames to form a checker brick bed surface flow field corresponding to radiation of 15-25 degrees, the third row of nozzles adopt short flames and can be mixed and expanded during the operation of flue gas, the contact edge of the second row of airflow field and the fourth exhaust airflow field is fully closed, the fourth row of nozzles are provided with rotational angles of 15-25 degrees and adopt no flames, a flow field of the checker brick bed surface corresponding to 25-35 degrees of radiation is formed; meanwhile, the flow rates of the four rows of spray holes are different), the air excess coefficient after the mixed combustion of the adjusted combustor is reduced to 1.02-1.05 from the original more than 1.1, and the original long-flame single-cyclone premixed long-flame combustion is optimized into a short-flame flameless and multi-cyclone column flow mixed combustion technology.
3. Because the traditional top combustion type hot air outlet is usually arranged at the bottom of the conical vault with the largest diameter and the most concentrated material-resistant stress, the damage rate is over 90 percent under the action of 3000-7000 tons of blind plate force, the material-resistant expansion stress of the silica bricks and the ten thousand tons of stress formed by limited and incapable expansion. Therefore, the hot air outlet is arranged at the side part of the combustor chamber (or arranged at the position of the combustor towards the ceiling part), the diameter of the part is small, the blind plate force is within hundreds of tons to 3000 tons, the material expansion is small, the concentrated stress action such as limited stress is avoided, the stability and the long service life are realized, and the defect of collapse and damage of the hot air outlet is thoroughly solved. Ensuring the stability and long service life of the hot blast stove.
4. The conical vault at the lower part of the burner is separated from a hot air outlet structure and is independently supported on a furnace body of the hot air furnace, the stress is dispersed and stable, and the stress of the conical vault is more reasonable and longer in service life. Nitrogen Oxides (NO)X) The content of the nitrogen is reduced to be within the range of 30-100 mg from the original 100-300 mg, which is very beneficial to low nitrogen emission and environmental protection.
5. When necessary, the four rows of spray holes can be set to be of a structure with all short flames or all flameless structures, or staggered swirl short flames can be combined, but the uppermost row is of a columnar flow structure without swirl, so that the device is convenient and flexible;
6. the number of rows of nozzles can be set according to the air volume of the furnace volume, and can also be set into one row, two rows or three rows.
7. The combustor shell is made of acid-resistant steel plates Q345R (HIC) of the pressure vessel, and the shell is made of steel plates which are resistant to pressure and corrosion and long in service life.
Practice proves that the burner of the invention adopts the combination of short flame and flameless, namely two rows of flameless spray holes and two rows of short flame spray holes are arranged in a crossed way (can also be implemented by adopting a structure of four rows of short flame or four rows of flameless mixed combustion nozzles, but the length of the flame directly determines the size of the space of a combustion chamber). The specific arrangement is that the direct injection short flame non-rotation angle of the top row of spray holes, the main purpose of the arrangement is that the four rows of holes of the rotational flow of the burner are provided with rotational flow angles, so that the center of a flue gas flow field entering the conical top of the combustion chamber is a vortex, strong rotational flow causes uneven flow field, and the lower parts of the rotational flow of the second, third and fourth rows are in a gradually enlarged state, so that the columnar flow short flame combustion characteristic is adopted, the flue gas gradually enlarges along with the expansion of the mixed combustion volume from top to bottom to make up the defect, except the action of the central column flow, the purpose of the rotational flow short flame mixed combustion of the third row is the same as that of the central column flow, the short flame gradually expands along with the downward volume of the rotational flow to expand the flow field width, and through the arrangement, the columnar flow, the first, second and third rows of flow fields are uniformly distributed on the surface of the checker brick, thereby greatly improving the heating uniformity of the checker brick in the heat storage chamber of the hot-blast stove, Utilization ratio. At present, the regenerative chambers of hot blast stoves in China and even in the world are kept between 5 and 11 meters, the bed surface of the regenerative chamber of Jing Tang company is 10.894 meters, and the area of the bed surface of the regenerative chamber reaches 93.16 square meters, so that the bed surface of a large checker brick is not uniformly distributed no matter depending on the 25-degree angle of a single rotational flow, the waste of the checker brick is huge, the heat loss and the wind temperature loss are larger, and the fuel loss cannot be calculated.
The data show that nitrogen in the air is oxidized at high temperature to produce NOx, which is called thermal NOx. NOx generated in the air supply process of air flow combustion of the hot blast stove is mainly thermal NOx.
The formation mechanism of thermal NOx, and various combustion technologies and burner analyses for inhibiting the formation of thermal NOx. The main factors that prove to influence the formation of thermal NOx are temperature, oxygen concentration and residence time in the high-temperature zone, and the main methods by which the formation of thermal NOx is controlled can be summarized as follows: (1) local high temperatures (gas flow mixing must be uniform) are avoided. (2) The oxygen concentration is reduced (excess air amount is reduced). (3) The residence time of the combustion gas stream in the high temperature zone is reduced (short flame combustion). Therefore, the burner which reduces the generation of thermal NOx is researched and developed to reduce the emission of toxic and harmful gases and prevent the shell from oxidation, corrosion and cracking so as to prolong the service life of the hot blast stove.
The burner nozzle of the small cap top combustion hot blast stove is arranged at the inner side, the gas nozzle and the air nozzle are arranged in four layers, and the air flow is rotationally cut, sprayed and rotationally premixed to burn. The nozzles arranged in a layered way can form uneven mixing of coal gas and air, the air excess coefficient is up to more than 1.1, so that local high temperature is caused, and the generation amount of nitrogen oxides is increased due to the local high temperature; the air flow rotates and mixes and burns in advance, it is along mixing the inside of combustion chamber in advance, rotate and burn in advance downwards, not only lengthen and mix and burn the dwell time (long flame burning), improve the nitrogen oxide and produce the quantity, can cause the peripheral air current to be strong, the middle air current is weak, form the local high temperature in addition. In order to reduce the amount of nitrogen oxides generated, it is possible to remove the hot air outlet, increase the checker packing height, reduce the combustion chamber height, shorten the combustion gas operation time, and reduce the amount of nitrogen oxides generated (flameless, short flame combustion). The mixed combustion burner is arranged by adopting flameless short-flame multi-rotational-flow columnar flow at the inner side of the combustor, the air excess coefficient is as small as 1.02-1.05, high-temperature flue gas can be uniformly distributed, local high temperature can be prevented, and the generation amount of nitrogen oxides is reduced.
The hot air outlet of the burner is arranged on one side wall of the burner, the conical independent vault is supported on a furnace body through the supporting plate, the structure is stable, the distance between the combined checker brick pitted surface burner nozzle and a near nozzle is increased by optimizing the checker bricks, the high-temperature pressure of combustion is reduced, the multi-column swirling flow is realized without heating, the air temperature, the efficiency and the nitrogen oxide of the hot air furnace can be adjusted to be the most advanced hot air furnace with energy conservation, high efficiency, high air temperature, low carbon and long service life which meets the design requirements, and the service life can be prolonged by more than five years.
In a word, the invention has novel and unique structure and good use effect, improves the air temperature, reduces the coal consumption, reduces the discharge amount of nitrogen oxides, and reduces the discharge amount to 30-90mg/m3The burner has long service life, can prolong the service life by more than 5 years, improves the service efficiency of the hot blast stove, effectively realizes energy conservation, low nitrogen and environmental protection, is a great innovation on the hot blast stove and the burner, and has remarkable economic and social benefits.
Claims (4)
1. A burner for a multi-rotational-flow columnar-flow low-nitrogen top-combustion type hot blast stove comprises a burner body and is characterized in that an upper air inlet pipe (10-1), a middle gas inlet pipe (10-2) and a lower air inlet pipe (10-3) are arranged at the upper part of the side wall of a wall body of the burner (2), a gas loop (9-2), a first air loop (9-1) and a second air loop (9-3) which are arranged at intervals are arranged in the wall body of the burner (2), the gas loop (9-2) is arranged at the middle part of the wall body of the burner (2), the first air loop (9-1) and the second air loop (9-3) are respectively arranged at the upper side and the lower side of the gas loop (9-2) to form a three-loop structure, and a first air channel (16-1) and a second air channel (16- 2) The gas loop (9-2) is sequentially and alternately provided with a first gas channel (17-1), a second gas channel (17-2), a third gas channel (17-3) and a fourth gas channel (17-4) from top to bottom, the first gas channel (17-1) and the third gas channel (17-3) are in a vertical space, the second gas channel (17-2) and the fourth gas channel (17-4) are in a vertical space, the upper part of a lower air inlet pipe (10-3) is alternately and respectively provided with a first air ascending pipeline (18-1) and a second air ascending pipeline (18-2), and the first air channel (16-1) and the first gas channel (17-1) are communicated with a first row of nozzles (11) through a first mixing channel (19-1), the second air channel (16-2) and the second gas channel (17-2) are communicated with the second row of nozzles (12) through a second mixing channel (15-1), the first air ascending pipeline (18-1) and the third gas channel (17-3) are communicated with the third row of nozzles (13) through a third mixing channel (19-2), the second air ascending pipeline (18-2) and the fourth gas channel (17-4) are communicated with the fourth row of nozzles (14) through a fourth mixing channel (15-2), and the first row of nozzles (11), the second row of nozzles (12) and the fourth row of nozzles (13) form a nozzle short-flame flameless up-down staggered four-row multi-swirl multi-angle wide flow field jet flow structure.
2. The multi-cyclone columnar flow low-nitrogen top-fired hot blast stove according to claim 1, wherein the first row of nozzles (11) is columnar flow injection, the second row of nozzles (12) has an included angle of 5-15 degrees, the third row of nozzles (13) has an included angle of 15-25 degrees, and the fourth row of nozzles (14) has an included angle of 25-35 degrees.
3. The burner for the multi-cyclone plume low-nitrogen top-firing hot blast stove according to claim 1, wherein the lower part of the burner body (2) is supported outside the upper part of the independent dome (4) through the support plate (5), and the lower part of the independent dome (4) is supported outside the upper part of the stove body through the stove shell support plate (6).
4. The burner for the multi-cyclone columnar-flow low-nitrogen top-fired hot air furnace as claimed in claim 1, wherein the wall of the burner (2) is provided with a hot air outlet pipe (8) communicated with the combustion chamber in the burner (2) at the lower side of the three-ring structure, and the lower part of the burner is flush with the part with the small diameter phi 1 at the upper part of the independent vault (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210252543.7A CN114574646B (en) | 2022-03-15 | 2022-03-15 | Multi-rotational-flow column-flow low-nitrogen top-combustion type burner for hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210252543.7A CN114574646B (en) | 2022-03-15 | 2022-03-15 | Multi-rotational-flow column-flow low-nitrogen top-combustion type burner for hot blast stove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114574646A true CN114574646A (en) | 2022-06-03 |
| CN114574646B CN114574646B (en) | 2023-02-07 |
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| CN202210252543.7A Active CN114574646B (en) | 2022-03-15 | 2022-03-15 | Multi-rotational-flow column-flow low-nitrogen top-combustion type burner for hot blast stove |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201574160U (en) * | 2010-01-05 | 2010-09-08 | 刘世聚 | Top combustion hot-blast stove with novel combustion device |
| CN203238289U (en) * | 2013-05-03 | 2013-10-16 | 郑州市宏发耐火材料有限公司 | Hot-blast stove for combusting in preheating regenerator employing evenly distributed premixing nozzles in hedging and jetting manners |
| CN204550645U (en) * | 2015-03-28 | 2015-08-12 | 陈维汉 | A kind of hotblast stove of samming current-sharing of coal gas premixed flow convolution burning |
| US20180340237A1 (en) * | 2015-11-30 | 2018-11-29 | Paul Wurth Refractory & Engineering Gmbh | Top combustion stove |
| CN209495326U (en) * | 2019-01-30 | 2019-10-15 | 郑州豫兴热风炉科技有限公司 | A kind of top combustion stove of double air intake swirl injection burners |
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2022
- 2022-03-15 CN CN202210252543.7A patent/CN114574646B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201574160U (en) * | 2010-01-05 | 2010-09-08 | 刘世聚 | Top combustion hot-blast stove with novel combustion device |
| CN203238289U (en) * | 2013-05-03 | 2013-10-16 | 郑州市宏发耐火材料有限公司 | Hot-blast stove for combusting in preheating regenerator employing evenly distributed premixing nozzles in hedging and jetting manners |
| CN204550645U (en) * | 2015-03-28 | 2015-08-12 | 陈维汉 | A kind of hotblast stove of samming current-sharing of coal gas premixed flow convolution burning |
| US20180340237A1 (en) * | 2015-11-30 | 2018-11-29 | Paul Wurth Refractory & Engineering Gmbh | Top combustion stove |
| CN209495326U (en) * | 2019-01-30 | 2019-10-15 | 郑州豫兴热风炉科技有限公司 | A kind of top combustion stove of double air intake swirl injection burners |
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| CN114574646B (en) | 2023-02-07 |
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