CN217382937U

CN217382937U - Ignition type flat flame low NOx combustor

Info

Publication number: CN217382937U
Application number: CN202221292494.1U
Authority: CN
Inventors: 王文奇; 郭晔媛; 黄书广; 高宇乐; 刘旭阳; 陆波
Original assignee: Luoyang Ruichang Environmental Engineering Co ltd
Current assignee: Luoyang Ruichang Environmental Engineering Co ltd
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-09-06
Anticipated expiration: 2032-05-26

Abstract

The utility model provides a flat flame low NOx combustor of ignition type, including combustor casing, resistant firebrick subassembly and combustor wind channel, set up double-end pilot lamp at resistant firebrick subassembly's center, gas rifle subassembly in resistant firebrick subassembly's inboard sets up, sets up outer gas rifle subassembly in resistant firebrick subassembly's the outside, sets up the steady fire hole of resistant firebrick fuel on resistant firebrick subassembly, sets up the ignition structure on resistant firebrick subassembly, and outer gas rifle subassembly cooperatees with the ignition structure, sets up interior gas rifle governing valve on the gas rifle subassembly including. The pilot type flat flame low NOx burner of the utility model can take various conditions into consideration; when the furnace temperature is low, the combustor can stably operate and effectively control the generation of CO; when the blast furnace is at a high temperature, the inner gas gun assembly is closed through the inner gas gun regulating valve, and the combustion can be stabilized only by the double-head pilot burner, the outer gas gun assembly and the ignition structure, so that the central temperature of the refractory brick assembly is greatly reduced, and the NOx is obviously reduced.

Description

Ignition type flat flame low NOx combustor

Technical Field

The utility model relates to a combustor field particularly, relates to a flat flame low NOx combustor of ignition type.

Background

The flat flame burner is used for hydrogenation devices, coking devices, styrene devices and the like of tube furnace heating furnaces. The furnace temperature difference of the heating furnace of the devices is large. When the temperature of a hearth of a conventional combustor is about 600 ℃ or below, the central temperature of flame needs to be increased to avoid excessive generation of CO in the temperature section, but NOx is likely to be generated more in a high-temperature flame region; however, when the temperature of the hearth is about 700 ℃ or above, CO reaches the ignition temperature and is not generated in large quantity, but the temperature of the flame center needs to be reduced, so that the generation of NOx can be effectively controlled. Particularly, the hearth temperature of the hydrogenation device is very high (about 700 ℃) in the start-up stage, but the hearth temperature can be reduced to more than 500 ℃ in normal operation; thus, the burner needs to take account of various structural conditions, effectively control CO at low furnace temperatures and effectively control NOx at high furnace temperatures.

For example, prior art patent application No. CN201120539485.3 discloses a flat flame low NOx gas burner, a burner housing, a register butterfly valve, a center gas gun, a secondary gas gun, and rectangular refractory bricks; the gun head of the central gas gun is T-shaped; two sets of secondary gas guns are symmetrically arranged on the long edges of two sides of the rectangular refractory brick and are directly communicated with the hearth, and each secondary gas gun is composed of a plurality of secondary fuel grading pipes; the rectangular firebricks are arranged at the upper part of the burner shell, and a rectangular flame path is arranged at the center of the rectangular firebricks; a spoiler with an included angle of 20-60 degrees with the inner wall of the combustor shell is arranged on the inner wall of the combustor shell; a flame stabilizer with multiple holes is arranged in the rectangular flame path of the rectangular refractory brick. Although the patent makes combustion flame more stable, combustion temperature lower, and the burning is more abundant, reaches energy-conserving, environmental protection, efficient effect, the combustor can not compromise multiple condition structurally, can not both effectively control CO in the time of low furnace temperature, effectively control NOx in the time of high furnace temperature again.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flat flame low NOx combustor of ignition type to solve among the prior art combustor and structurally can not compromise the multiple condition, can not both effectively control CO in low furnace temperature, effectively control NOx's problem in high furnace temperature again.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a low NOx combustor of flat flame of ignition type, the low NOx combustor of flat flame of ignition type includes combustor casing, firebrick subassembly and combustor wind channel the center of firebrick subassembly sets up the double-end pilot burner the inboard of firebrick subassembly sets up interior gas rifle subassembly the outside of firebrick subassembly sets up outer gas rifle subassembly set up the steady fire hole of firebrick fuel on the firebrick subassembly set up the ignition structure on the firebrick subassembly, outer gas rifle subassembly with the ignition structure cooperatees set up interior gas rifle governing valve on the interior gas rifle subassembly.

A flat flame low NOx combustor of ignition type, can compromise multiple condition. On one hand, under the low-temperature working condition, the inner gas gun assembly and the outer gas gun assembly penetrate through the ignition structure to assist combustion of ignition flame, the stability of the flame can be greatly improved, and the combustor can effectively control CO during stable operation. On the other hand, when the temperature of the blast furnace is high, the inner gas gun component is closed through the inner gas gun regulating valve, flame can be stably combusted only by the double-head pilot burner, the outer gas gun component and the ignition structure, the temperature of the center of the refractory brick component is greatly reduced, and NOx is obviously reduced.

Furthermore, the ignition structure comprises an ignition hole and an ignition stop block, and the ignition hole is matched with the ignition stop block.

The arrangement of the ignition hole is convenient for leading the flame of the outer gas gun component into the interior of the refractory brick component; the setting of kindling dog can be upwards towards after the flame reflection, the flame of stable outside branch.

Furthermore, the outer gas gun assembly is arranged at one end of the ignition hole, and the ignition stop block is arranged at the other end of the ignition hole.

This arrangement facilitates the introduction of the flame of the outer gas gun assembly into the interior of the refractory block assembly.

Further, the spray hole of the inner gas gun component faces the outer gas gun component.

Further, the spray holes of the outer gas gun assembly comprise a first spray hole and a second spray hole, the first spray hole faces to the center of the refractory brick assembly, and the second spray hole faces to the ignition hole.

Furthermore, the inner gas gun assemblies are arranged into two groups, and the two groups of inner gas gun assemblies are symmetrically distributed along the center line of the refractory brick assembly.

Furthermore, the outer gas gun assemblies are arranged into two groups, and the two groups of outer gas gun assemblies are symmetrically distributed along the center line of the refractory brick assembly.

Furthermore, the double-head incandescent light comprises a first head and a second head, the first head and the second head are symmetrically distributed on the double-head incandescent light, the refractory brick fuel fire stabilizing holes comprise a first fire stabilizing hole and a second fire stabilizing hole, the first head is matched with the first fire stabilizing hole, and the second head is matched with the second fire stabilizing hole.

Further, a peephole assembly and an ignition hole assembly are arranged on the burner shell.

This arrangement facilitates the flame viewing of the burner and the ignition of the incandescent lamp.

Furthermore, an air door air adjusting handle is arranged on the air duct of the combustor.

This arrangement facilitates adjustment of the amount of combustion air entering the burner duct.

Compared with the prior art, a low NOx combustor of flat flame of kindling type, can compromise the multiple condition. On one hand, under the low-temperature working condition, the inner gas gun assembly and the outer gas gun assembly penetrate through the ignition structure to assist combustion of ignition flame, the stability of the flame can be greatly improved, and the combustor can effectively control CO during stable operation. On the other hand, when the temperature of the blast furnace is high, the inner gas gun component is closed through the inner gas gun regulating valve, flame can be stably combusted only by the double-head pilot burner, the outer gas gun component and the ignition structure, the temperature of the center of the refractory brick component is greatly reduced, and NOx is obviously reduced.

Drawings

Fig. 1 is a schematic structural diagram of a pilot-type flat-flame low NOx burner according to an embodiment of the present invention;

fig. 2 is a schematic bottom view of a pilot-type flat-flame low NOx burner according to an embodiment of the present invention;

fig. 3 is a schematic side view of a pilot-fired flat-flame low NOx burner according to an embodiment of the present invention;

FIG. 4 is a schematic view of a refractory block assembly for a pilot-fired flat-flame low NOx burner according to an embodiment of the present invention;

FIG. 5 is a schematic view, partially in section, of a refractory block assembly for a pilot-fired flat-flame low NOx burner according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a double-ended pilot burner of a pilot-type flat-flame low NOx burner according to an embodiment of the present invention.

Description of reference numerals:

1. a refractory brick assembly; 2. a priming structure; 21. a firing hole; 22. a firing stop block; 4. a refractory brick fuel fire stabilizing hole; 5. a burner housing; 6. a burner air duct; 7. an air door air adjusting handle; 8. a double-ended pilot burner; 81. a first head; 82. a second head; 9. a fire hole assembly; 10. a firing orifice assembly; 11. a firebrick holder; 12. a burner mounting plate; 13. an outer gas gun assembly; 14. an inner gas gun assembly; 15. an inner gas gun regulating valve.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The descriptions of "first", "second", etc. mentioned in the embodiments of the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example 1

The present embodiment provides a pilot type flat flame low NOx burner, as shown in fig. 1 to 6, the pilot type flat flame low NOx burner includes a burner housing 5, a firebrick assembly 1 and a burner air duct 6, a double-ended pilot burner 8 is disposed at the center of the firebrick assembly 1, the double-ended pilot burner 8 is used for igniting main fire of an inner gas gun assembly 14 and an outer gas gun assembly 13, the inner gas gun assembly 14 is disposed at the inner side of the firebrick assembly 1, the outer gas gun assembly 13 is disposed at the outer side of the firebrick assembly 1, a firebrick fuel fire stabilizing hole 4 is disposed on the firebrick assembly 1, and the firebrick fuel fire stabilizing hole 4 is matched with the double-ended pilot burner 8; the flame of the double-head pilot burner 8 penetrates through the fire stabilizing hole 4 of the refractory brick fuel to burn; the firebrick component 1 is provided with a firing structure 2, the outer gas gun component 13 is matched with the firing structure 2, the outer gas gun component 13 penetrates through the firing structure 2 to form a firing flame, and as shown in fig. 1, 2 and 3, the inner gas gun component 14 is provided with an inner gas gun regulating valve 15.

The present embodiment proposes a pilot-type flat-flame low NOx burner that can take into account a variety of situations. On one hand, under the low-temperature working condition, the inner gas gun assembly 14 and the outer gas gun assembly 13 penetrate through the ignition structure 2 to support combustion of ignition flame, the stability of the flame can be greatly improved, and the combustor can effectively control the generation of CO while stably running. On the other hand, when the temperature of the blast furnace is high, the inner gas gun assembly 14 is closed through the inner gas gun regulating valve 15, flame can be stably combusted only by the double-head pilot burner 8, the outer gas gun assembly 13 and the ignition structure 2, the temperature of the center of the refractory brick assembly 1 is greatly reduced, and NOx is obviously reduced.

Specifically, as shown in fig. 4 and 5, the ignition structure 2 includes an ignition hole 21 and an ignition stopper 22, and the ignition hole 21 and the ignition stopper 22 are matched.

The ignition hole 21 is arranged to facilitate the introduction of the flame of the outer gas gun assembly 13 into the interior of the refractory block assembly 1; the ignition block 22 is arranged to reflect the flame upwards to stabilize the flame in the outer branch.

Specifically, the outer gas gun assembly 13 is disposed at one end of the ignition hole 21, and the ignition stopper 22 is disposed at the other end of the ignition hole 21.

This arrangement facilitates the introduction of the flame of the outer gas gun assembly 13 into the interior of the refractory block assembly 1.

Specifically, the nozzle hole of the inner gas gun assembly 14 faces the outer gas gun assembly 13.

Specifically, the nozzle holes of the outer gas gun assembly 13 include a first nozzle hole facing the center of the refractory brick assembly 1 and a second nozzle hole facing the ignition hole 21.

Specifically, the inner gas gun assemblies 14 are arranged into two groups, and the two groups of inner gas gun assemblies 14 are symmetrically distributed along the center line of the refractory brick assembly 1.

Specifically, the number of the inner gas guns of the inner gas gun assembly 14 is not limited. The number of inner gas guns of the inner gas gun assembly 14 may be one, two, three or six, etc.

Preferably, in this embodiment, the number of the inner gas guns of the inner gas gun assembly 14 is three. The arrangement can achieve a better combustion effect and simultaneously does not waste resources.

Specifically, the outer gas gun assemblies 13 are arranged into two groups, and the two groups of outer gas gun assemblies 13 are symmetrically distributed along the center line of the refractory brick assembly 1.

Specifically, the number of the outer gas guns of the outer gas gun assembly 13 is not limited. The number of outer gas guns of the outer gas gun assembly 13 may be one, two, three or six, etc.

Preferably, in the present embodiment, the number of the outer gas guns of the outer gas gun assembly 13 is three. The arrangement can achieve a better combustion effect and simultaneously does not waste resources.

Specifically, as shown in fig. 6, the double-ended incandescent lamp 8 includes a first head 81 and a second head 82, the first head 81 and the second head 82 are symmetrically distributed on the double-ended incandescent lamp 8, the refractory brick fuel fire stabilizing holes 4 include a first fire stabilizing hole and a second fire stabilizing hole, the first head 81 is matched with the first fire stabilizing hole, and the second head 82 is matched with the second fire stabilizing hole.

The burner is ignited by the double-head pilot burner 8, the first head 81 and the second head 82 respectively face to two sides of the refractory brick component 1, the first fire stabilizing hole and the second fire stabilizing hole are formed in the tops of the two sides of the refractory brick component 1, flame of the double-head pilot burner 8 can penetrate through the refractory brick fuel fire stabilizing hole 4 to burn, and the flame of the double-head pilot burner 8 is used for igniting main fire of the inner gas gun component 14 and the outer gas gun component 13.

Specifically, the number of the first fire stabilizing holes and the second fire stabilizing holes is not limited. The number of the first fire stabilizing holes and the second fire stabilizing holes can be six, nine or twelve, and the like.

Preferably, in this embodiment, the number of the first fire stabilizing holes and the number of the second fire stabilizing holes are nine. This arrangement further enhances the flame stabilizing effect of the firebrick fuel flame stabilizing holes 4.

Specifically, as shown in fig. 1 and 2, a burner attachment plate 12 is provided on the burner housing 5.

This arrangement facilitates mounting of the burner to the furnace via the burner mounting plate 12.

Specifically, as shown in fig. 1, a firebrick holder 11 is provided to the firebrick assembly 1. This arrangement facilitates the installation of the refractory block assembly 1 on the burner housing 5.

Specifically, as shown in fig. 2, a sighting hole assembly 9 and an ignition hole assembly 10 are arranged on the burner housing 5, and the sighting hole assembly 9 is used for sighting the burner; the ignition hole assembly 10 is used for ignition of the double-ended incandescent lamp 8.

This arrangement facilitates the burner flame-out and ignition of the double-ended pilot burner 8.

More specifically, as shown in fig. 2, the fire hole assembly 9 and the ignition hole assembly 10 are provided at the bottom of the burner housing 5.

Specifically, as shown in fig. 1, an air damper air adjusting handle 7 is disposed on the burner air duct 6, and the air damper air adjusting handle 7 is used for adjusting the amount of air entering the burner.

This arrangement facilitates the adjustment of the amount of combustion air entering the burner stack 6.

For the pilot-type flat-flame low NOx burner, besides the refractory brick assembly 1, the burner housing 5, and the like, other related components are included, and since the specific structures and the specific assembly relationships of the related components are the prior art, detailed description thereof is omitted here.

In the pilot-type flat-flame low-NOx burner of the present embodiment, at the initial stage of ignition operation and under the low furnace temperature condition, the inner gas gun assembly 14 and the outer gas gun assembly 13 are both in the open state, the two sets of inner gas gun assemblies 14 are located inside the refractory brick assembly 1, the nozzle holes of the inner gas gun assemblies 14 face the outer gas gun assembly 13, and the inner gas gun assemblies 14 simultaneously spray toward the refractory brick fuel stabilizing holes 4. The two groups of outer gas gun assemblies 13 are arranged outside the refractory brick assembly 1, the first spray holes of the outer gas gun assemblies 13 face to the center of the refractory brick assembly 1, the second spray holes face to the ignition holes 21, the outlet of the ignition holes 21 is provided with ignition stoppers 22, and the ignition stoppers 22 reflect the flame and then face upwards to stabilize the flame branched from the outside; the inner gas gun component 14, the outer gas gun component 13 and the pilot flame can greatly increase the stability of the flame under the combustion supporting effect of the pilot flame, and the combustor can effectively control the generation of CO while stably running.

Under the working condition of high-load blast furnace temperature, the inner gas gun assembly 14 can be closed through the inner gas gun regulating valve 15, at the moment, because the load of a combustor is large and the fuel pressure is high, the stability of flame sprayed outside the gas gun can be stabilized only by the double-head pilot burner 8, the outer gas gun assembly 13, the ignition hole 21 of the ignition structure 2 and the ignition stop block 22, the temperature of the center of the refractory brick is greatly reduced, and the NOx is obviously reduced.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. The utility model provides a flat flame of ignition type hangs down NOx combustor, its characterized in that, flat flame hangs down NOx combustor of ignition type includes combustor casing (5), resistant firebrick subassembly (1) and combustor wind channel (6) the center of resistant firebrick subassembly (1) sets up double-end pilot burner (8) the inboard of resistant firebrick subassembly (1) sets up interior gas gun subassembly (14), the outside of resistant firebrick subassembly (1) sets up outer gas gun subassembly (13), set up resistant firebrick fuel steady fire hole (4) on resistant firebrick subassembly (1) set up ignition structure (2) on resistant firebrick subassembly (1), outer gas gun subassembly (13) with ignition structure (2) cooperate, set up interior gas gun governing valve (15) on interior gas gun subassembly (14).

2. A pilot type flat flame low NOx burner according to claim 1, characterized in that the pilot structure (2) comprises a pilot hole (21) and a pilot block (22), the pilot hole (21) cooperating with the pilot block (22).

3. A pilot type flat flame low NOx burner according to claim 2, characterized in that the outer gas gun assembly (13) is disposed at one end of the pilot hole (21), and the pilot block (22) is disposed at the other end of the pilot hole (21).

4. A pilot flat flame low NOx burner according to claim 3, characterized in that the orifice of the inner gas gun assembly (14) is directed towards the outer gas gun assembly (13).

5. The pilot-fired flat-flame low NOx burner as claimed in claim 4, characterized in that the injection holes of the outer gas gun assembly (13) include a first injection hole toward the center of the refractory block assembly (1) and a second injection hole toward the pilot hole (21).

6. A pilot-fired flat-flame low NOx burner according to claim 5, characterised in that the inner gas gun assemblies (14) are arranged in two groups, the two groups of inner gas gun assemblies (14) being symmetrically distributed along the centre line of the refractory brick assembly (1).

7. A pilot-fired flat-flame low NOx burner according to claim 6, characterised in that the outer gas gun assemblies (13) are arranged in two groups, the two groups of outer gas gun assemblies (13) being symmetrically distributed along the centre line of the refractory block assembly (1).

8. The pilot-type flat-flame low-NOx burner of claim 1, wherein the double-ended pilot burner (8) comprises a first head (81) and a second head (82), the first head (81) and the second head (82) are symmetrically distributed on the double-ended pilot burner (8), the refractory brick fuel fire stabilizing holes (4) comprise a first fire stabilizing hole and a second fire stabilizing hole, the first head (81) is matched with the first fire stabilizing hole, and the second head (82) is matched with the second fire stabilizing hole.

9. A pilot-fired flat-flame low NOx burner according to claim 1, characterized in that a pilot hole assembly (9) and an ignition hole assembly (10) are provided on the burner housing (5).

10. Pilot-fired flat-flame low NOx burner according to claim 1, characterized in that a damper register handle (7) is provided on the burner stack (6).