CN217714912U - Overhead burner with gas ring pipe - Google Patents

Abstract

The utility model relates to a combustor of overhead type gas ring canal, can effectively solve the life of combustor and the hot-blast furnace that uses this combustor, the increasing the heat efficiency, reduce the energy consumption, reduce environmental pollution's problem, the top of combustor vault is arranged in to the gas ring canal, combustor wall body lower part outside is arranged in to the air ring canal, be equipped with gas passage in the combustor wall body, air duct, gas passage and the perpendicular parallel align to grid in turn of air passage, the gas ring canal, the air ring canal is respectively through the gas passage in branch pipe and the wall body, air duct is linked together, gas passage, air duct is linked together through nozzle stub and gas mixture nozzle stub respectively, combustor wall body lower part labyrinth sliding supports outside furnace body upper portion, the outer upper portion of furnace body one side is provided with the hot air exitus that is linked together with the combustion chamber. The utility model discloses novel structure is unique, easy production is built, and power is big, and steady flame hangs down the nitrogen, and is highly low, is applicable to large-scale blast furnace supporting, long service life, and the energy consumption is low, and heat utilization rate is high.

Description

Overhead gas ring pipe burner

Technical Field

The utility model relates to a burner, in particular to a burner with an overhead gas ring pipe.

Background

The combustor is the necessary equipment of hot-blast furnace, and the combustor has a variety at present, but the gas ring canal of combustor, air ring canal all set up in the combustor wall body on the whole, because the structural problem that exists, in the use, have following problem:

1. the structure is only suitable for a single hot blast furnace, and is not suitable for being matched with a large blast furnace, such as 3 hot blast furnaces;

2. because the gas ring pipe and the air ring pipe are arranged in the wall body, the conical vault of the hot blast stove is too high, so that the stove body has too large bearing, is easy to damage and has short service life;

3. the distance between the lattice bricks in the regenerator of the furnace body and the flame is large, the heating speed of the lattice bricks is low, the utilization rate of the heat efficiency is low, and nitrogen oxides are easy to generate, thereby causing adverse effects on the environment;

4. at present, most hot air outlets are arranged on a wall body of a combustor, expansion stress is large, expansion and shrinkage damage is easy to generate, hot air is large, the outlet structure is unstable, and the service life is influenced;

5. the detonation is strong in mixed combustion, the air excess coefficient is high, the heat efficiency utilization rate is low, energy is wasted, the nozzle is easy to damage, and the service life of the nozzle is directly influenced.

Therefore, due to the problems of the existing burner hot blast stove, improvement and innovation of the structure of the burner are imperative.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, the utility model aims to provide a burner of overhead gas ring canal, which can effectively solve the problems of the service life of the burner and the hot blast stove using the burner, improve the heat efficiency, reduce the energy consumption and reduce the environmental pollution.

The utility model provides a technical scheme be, a combustor of overhead type gas ring canal, including the combustor body, the gas ring canal, the air ring canal, the top of combustor vault is arranged in to the gas ring canal, combustor wall body lower part outside is arranged in to the air ring canal, be equipped with gas channel in the combustor wall body, air passage, gas channel and the perpendicular parallel alternative align to grid of air passage, the gas ring canal is linked together through the gas branch pipe with the gas channel in the wall body, the air ring canal is linked together through the air branch pipe with the air passage in the wall body, gas channel is linked together through gas nozzle of gas nozzle and gas mixture nozzle of equipartition on the combustor inner wall of combustor, combustor wall body lower part labyrinth glide type supports outside furnace body upper portion (well-known technology), the outer upper portion of furnace body one side is provided with the hot air exitus that is linked together with the combustion chamber.

The utility model discloses novel structure is unique, and easy production is built, and power is big, and steady flame hangs down nitrogen, and is highly low, is applicable to large-scale blast furnace supporting, long service life, and the energy consumption is low, and heat utilization rate is high, and is energy-concerving and environment-protective, has apparent economy and social.

Drawings

Fig. 1 is a front view of the cross section of the present invention.

Fig. 2 isbase:Sub>A sectional top view of the portionbase:Sub>A-base:Sub>A of fig. 1 according to the present invention.

Fig. 3 is a sectional top view of the portion B-B of fig. 1 according to the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-3, the utility model relates to a burner of overhead gas ring canal, including the burner body, the gas ring canal, the air ring canal, gas ring canal 1 is arranged in the top of burner vault, air ring canal 6 is arranged in the outside of burner wall 12 lower part, be equipped with gas channel 3 in the burner wall 12, air channel 5, gas channel 3 and the perpendicular parallel alternative align to grid of air channel 5, gas ring canal 1 is linked together with gas channel 3 in the wall through gas branch pipe 2, air ring canal 6 is linked together with air channel 5 in the wall through air branch pipe 4, gas channel 3 is linked together with gas mixture nozzle stub 13 through gas stub 7, air channel 5 is linked together with gas mixture nozzle stub 13 through air stub 8, gas mixture nozzle stub 13 is linked together with the gas mixture nozzle 9 of equipartition on the combustor inner wall of burner, burner wall 12 lower part labyrinth slip formula support outside furnace body 10 upper portion (known technology), furnace body 10 one side outer upper portion is provided with hot air outlet 11 that is linked together with the combustion chamber.

In order to ensure the use effect and convenient use, the diameter of the hollow pipe of the gas ring pipe 1 is larger than that of the hollow pipe of the air ring pipe 6, and the hollow pipes are arranged horizontally and parallelly in an up-down spaced manner;

the gas channel 3 and the air channel 5 are at least arranged in one row, each gas channel 3 is communicated with the gas ring pipe 1 through a gas branch pipe 2, and each air channel 5 is communicated with the air ring pipe 6 through an air branch pipe 4;

the mixed gas nozzles 9 are uniformly inclined and are uniformly distributed on the inner wall of the combustion chamber;

the gas channel 3 and the air channel 5 are respectively provided with an upper row of nozzles and a lower row of nozzles which are annularly arranged, the gas short pipe 7, the air short pipe 8 and the mixed gas short pipe 13 which correspond to each row are communicated with the mixed gas nozzle 9, wherein the first row of spray holes at the upper part are straight spray holes which are vertical to the central axis of the burner, the second row of spray holes which are at a rotary cutting angle of 5-15 degrees with the central axis, the third row of spray holes which are at a rotary cutting angle of 15-25 degrees with the central axis, and the fourth row of spray holes which are at a rotary cutting angle of 25-35 degrees with the central axis.

The spray holes are arranged in one row or a plurality of rows which are uniformly distributed, and when the spray holes are arranged in one row, the rotational flow angle is 5-35 degrees; when the two rows are formed, the two rows are all at 5-35 degrees or one row is directly sprayed and one row is at 5-35 degrees; when the number of the rows is three, the angles are all 5-35 degrees, or one row is directly sprayed, and the other two rows are respectively 5-25 degrees and 5-35 degrees; when the number of the rows is four, the uniform rotational flow is 5-35 degrees, or one row is directly sprayed, and the rest are 5-15 degrees, 5-25 degrees and 5-35 degrees respectively;

the number of the mixed gas nozzles 9 is the same as that of the air spray holes and the gas spray holes, the air spray holes and the gas spray holes are communicated with the mixed gas short pipe 13 through the air short pipe 8 and the gas short pipe 7, mixed gas is formed in the mixed gas short pipe 13 and is sprayed out from the mixed gas nozzles 9, and a rotational flow mixed gas spraying structure is formed.

The gas ring pipe 1 and the air ring pipe 6 are both provided with air inlet pipe orifices (not marked in the figure and known in the prior art).

Can see by above-mentioned structure, the utility model discloses a combustor body, coal gas ring canal and air ring canal are equipped with in proper order from the top down outside the combustor wall, the coal gas ring canal is linked together through coal gas branch pipe and vertically gas piping, the air ring canal is linked together through air branch pipe and vertically air piping, coal gas branch pipe and air branch pipe are arranged in pairs, gas piping is the permutation with air piping, to arranging the coal gas nozzle stub and the air nozzle stub that are connected with the gas mixture nozzle respectively to both ends in, the gas mixture nozzle is one row or multirow setting, its novel structure is unique, easy installation is used, and is effectual, compared with the prior art, following outstanding technological advantage has:

1. the utility model has high power, no flame, low nitrogen and low height, is suitable for matching with a large blast furnace, and especially can realize the configuration of three hot blast furnaces;

2. the height of the conical vault is greatly reduced, and can be one half of the height of the conical vault of the original traditional top-combustion hot blast stove, the high-temperature bearing and the thermal stress formation of the refractory lining of the conical vault are reduced, a straight section is not provided with a hot air outlet which is damaged and collapsed and has short service life, the hot air outlet is arranged at the position of a small cap precombustion chamber, and the conical vault structure is based on a stable, long-life and independent support vault structure of a new-day iron and is a stable, long-life and stress-free structure which is independently supported on a stove shell and has no hole;

3. the diameter of the regenerator and the diameter hole of the upper precombustion chamber form a certain large diameter and proportion, the flame running distance between the combustion flame and the heating checker bricks is shortened, the checker bricks are quickly heated, the combustion flame running pressure is reduced, the residence time of the flame in the combustion chamber is shortened, the temperature difference between the combustion and air supply vault is reduced, the air temperature is improved, the efficiency is improved, and the generation amount of nitrogen oxides is reduced;

4. the hot air outlet is arranged at the base of the small cap, so that the expansion and contraction damage of expansion stress is reduced, and the small cap has small diameter and small blind plate force, so that the stability and the long service life of a hot air large outlet structure are facilitated;

5. four rows of holes are arranged at four angles, wherein the uppermost row of spray holes are directly sprayed without an angle, the second row of spray holes are in a rotary cutting angle of 5-15 degrees, the third row of spray holes are in a rotary cutting angle of 15-25 degrees, the fourth row of spray holes are in a rotary cutting angle of 25-35 degrees, the spray holes can be arranged in one row or in countless rows, if the spray holes are arranged in one row, the rotational flow angle is 5-35 degrees, if the spray holes are arranged in two rows, both the spray holes can be in a rotary cutting angle of 5-35 degrees, or one row of spray holes are directly sprayed with a rotary cutting angle of 5-35 degrees; if three rows can be all 5-35 degrees, also can be one row of direct injection, the other two rows are respectively 5-25 degrees and 5-35 degrees, if four rows can be all 5-35 degrees of rotational flow, also can be one row of direct injection, and the rest are respectively 5-15 degrees, 5-25 degrees and 5-35 degrees. The purpose of the arrangement can be to adjust the flue gas flow field to increase the diameters of the regenerator and the combustion chamber through the columnar flow multi-rotational flow, thus being beneficial to reducing the height of the checker bricks, being an ultra-large blast furnace which can be easily changed from 4-seat configuration to 3-seat configuration, reducing the investment, reducing the self high-temperature bearing damage rate of the checker bricks, reducing the energy consumption, improving the benefit, prolonging the synchronous service life of the checker bricks of the regenerator of the hot blast stove and the body of the hot blast stove, simultaneously adopting the checker bricks with smaller pore diameters, improving the heat storage and heat exchange performance, reducing the temperature difference between the vault crown and the air supply, further reducing the emission of nitrogen oxides, protecting the environment, saving the energy and further reducing the high wind temperature;

6. by adopting the internal premixed combustion nozzle structure, the mixed combustion is more reasonable, the knocking is weaker, the air excess coefficient is lower, the heat efficiency is higher, the nozzle structure is mature, stable, long-life and not easy to damage, the nozzle structure is an innovation on the combustor structure, and the economic and social benefits are remarkable.

Claims (7)

1. A burner of a top-mounted gas ring pipe comprises a burner body, the gas ring pipe and an air ring pipe, and is characterized in that the gas ring pipe (1) is arranged above a burner vault, the air ring pipe (6) is arranged outside the lower part of a burner wall body (12), a gas channel (3) and an air channel (5) are arranged in the burner wall body (12), the gas channel (3) and the air channel (5) are vertically, parallelly and alternately and uniformly arranged, the gas ring pipe (1) is communicated with the gas channel (3) in the wall body through a gas branch pipe (2), the air ring pipe (6) is communicated with the air channel (5) in the wall body through an air branch pipe (4), the gas channel (3) is communicated with mixed gas short pipes (13) through gas short pipes (7), the air channel (5) is communicated with the mixed gas short pipes (13) through air short pipes (8), the mixed gas short pipes (13) are communicated with mixed gas nozzles (9) uniformly distributed on the inner wall of the burner, the lower part of the burner wall body (12) is supported outside the upper part of the furnace body (10) in a sliding manner, and hot air outlets (11) are arranged outside one side of the furnace body (10).

2. The overhead gas grommet burner according to claim 1, wherein the gas grommet (1) has a larger diameter than the air grommet (6) and is horizontally arranged in parallel with the upper and lower sides spaced apart.

3. The burner of overhead gas bustle pipe according to claim 1, characterized in that there is at least one row of gas channels (3) and air channels (5), each gas channel (3) is connected to gas bustle pipe (1) through gas branch pipe (2), and each air channel (5) is connected to air bustle pipe (6) through air branch pipe (4).

4. The overhead gas bustle pipe burner of claim 1, characterized in that said gas mixture nozzles (9) are uniformly inclined and distributed on the inner wall of the combustion chamber.

5. The burner of the overhead gas bustle pipe according to claim 1, wherein the gas channel (3) and the air channel (5) are provided with four rows of nozzles arranged annularly, each row of the corresponding gas short pipe (7), air short pipe (8) and gas mixture short pipe (13) are communicated with the gas mixture nozzle (9), wherein the first row of the nozzles at the upper part are straight nozzles vertical to the central axis of the burner, the second row of the nozzles are nozzles forming a rotary cutting angle of 5-15 degrees with the central axis, the third row of the nozzles are nozzles forming a rotary cutting angle of 15-25 degrees with the central axis, and the fourth row of the nozzles are nozzles forming a rotary cutting angle of 25-35 degrees with the central axis.

6. The overhead gas bustle pipe burner of claim 5, wherein said orifices are in one row or in a plurality of rows uniformly distributed, and when in one row, the swirl angle is 5-35 degrees; when the two rows are formed, the two rows are all at 5-35 degrees or one row is directly sprayed and one row is at 5-35 degrees; when the three rows are all 5-35 degrees, or one row is directly sprayed, and the other two rows are 5-25 degrees and 5-35 degrees respectively; when the number of the rows is four, the uniform rotational flow is 5-35 degrees, or one row is directly sprayed, and the rest are 5-15 degrees, 5-25 degrees and 5-35 degrees respectively.

7. The burner of the overhead gas bustle pipe according to claim 1, wherein the number of the mixture nozzles (9) is the same as the number of the air nozzle holes and the number of the gas nozzle holes, the air nozzle holes and the gas nozzle holes are communicated with the mixture short pipe (13) through the air short pipe (8) and the gas short pipe (7), the mixture is formed in the mixture short pipe (13), and is sprayed out by the mixture nozzles (9) to form a swirl mixture spraying structure.

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