CN217843853U - Low-nitrogen combustor based on flue gas inner loop - Google Patents

Abstract

The utility model relates to a low nitrogen combustor technical field just discloses a low nitrogen combustor based on flue gas inner loop, including central gas pipe, the output department fixed mounting of central gas pipe has central shower nozzle, and the inside of central shower nozzle communicates with the inside of central gas pipe each other, and the equidistance circumference has been kept away from to central shower nozzle has seted up the gas aperture, and the outside fixed mounting of central shower nozzle has the flame dish, and the outside of flame dish is provided with the combustor shell, and the combustor shell includes the inner tube, and the inner tube is the outside outer loop gas pipe of circular sleeve and fixed mounting at the flame dish. The utility model discloses in, the air is sent into the combustor from supply-air duct and is also divided into two the tunnel, and furnace is sent into through middle flame dish and whirl blade to the connecting cylinder is sent into to some, and furnace is sent into through the fifth connecting pipe in some entering outer loop gas pipes, and effectual dispersion center air has reduced the first gas velocity of flow of straight-flow combustion, with the fine mixed postcombustion of gas, improves combustion efficiency.

Description

Low-nitrogen combustor based on flue gas inner loop

Technical Field

The utility model relates to a low-nitrogen burner technical field especially relates to a low-nitrogen burner based on flue gas inner loop.

Background

The industrial boiler provides kinetic energy for the production of industries such as textile, printing and dyeing, pharmacy, chemical industry, oil refining and the like; compared with coal and petroleum, natural gas is the cleanest of the three major petrochemical energy sources; natural gas is gradually transformed from alternative energy sources to bulk energy sources. The natural gas burner has many advantages compared with fuel oil and coal-fired burners, such as stable combustion flame, high combustion heat efficiency, low noise, relatively less harmful gas and smoke, and the like.

At present, the design of the low-nitrogen combustion in-effect dispersing central air is not reasonable enough, the gas flow rate of a straight-flow type combustion head is too low, and the gas combustion efficiency is low, so that a low-nitrogen combustor based on the flue gas internal circulation is provided.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problems existing in the prior art and provides a low-nitrogen burner based on flue gas inner circulation.

In order to realize above-mentioned purpose, the utility model discloses a following technical scheme, a low nitrogen burner based on flue gas inner loop, including central gas pipe, the output department fixed mounting of central gas pipe has central shower nozzle, the inside of central shower nozzle communicates with the inside of central gas pipe each other, the equidistance circumference has been kept away from to central shower nozzle, the outside fixed mounting of central shower nozzle has the flame dish, the outside of flame dish is provided with the combustor shell, the combustor shell includes the inner tube, the inner tube is circular sleeve and fixed mounting at the outside outer loop gas pipe of flame dish, the inside fixedly connected with gas inner spray tube of inner tube is corresponded to the one end of flame dish, the outside equidistance fixed mounting of inner tube has the arc circle, the terminal surface fixed mounting of arc circle has the connecting cylinder, the outside fixed mounting of connecting cylinder has mounting flange, mounting flange is annular disc mounting flange, the outside fixed mounting that the one end of keeping away from the inner tube corresponds the connecting cylinder has the gas chamber, the chamber is circular tubbiness of gap department between corresponding connecting cylinder and the gas outer chamber, the second card hole has been seted up for circular outer chamber to the gas outer disk side fixed mounting flange, the one end of swirl inner tube and the circular gas outer chamber, the first gas disk inner tube is located the circular gap card outer chamber, the air card outer chamber, the circular gas vane is seted up.

Preferably, a gas inner spray pipe is arranged inside the second clamping hole, and a gas outer spray pipe is arranged inside the first clamping hole.

As preferred, the spray tube includes the outer loop gas pipe in the gas, outer loop gas union coupling is in the inside in second card hole, the one end fixed mounting of outer loop gas pipe has first connecting pipe, first connecting pipe is round platform form expander, the outside joint of first connecting pipe has the second connecting pipe, the second connecting pipe is round platform expander, the one end fixed mounting that the outer loop gas pipe was kept away from to the second connecting pipe has the third connecting pipe, the third connecting pipe is circular pipeline, the one end fixed mounting that the second connecting pipe was kept away from to the third connecting pipe has first excessive pipe, the one end fixed mounting that the third connecting pipe was kept away from to first excessive pipe has the excessive pipe of second.

Preferably, a connecting ring is fixedly mounted on the outer side of the outer ring gas pipe, the connecting ring is a circular ring-shaped block, a first extrusion block is fixedly mounted on the end surface of the connecting ring corresponding to the end surface of the second connecting pipe, the first extrusion block is a ring-shaped block with an arc-shaped cross section, a second extrusion block is fixedly mounted on the end surface of the connecting ring corresponding to the position of the first extrusion block, and the second extrusion block is an S-shaped block.

Preferably, the clamping groove is formed in the end face of the connecting ring, the clamping groove is an annular block with a cross section being a parallelogram, a connecting block is fixedly mounted on the outer side of the fourth connecting pipe, the connecting block is an annular block with a cross section being a triangle, a clamping block is fixedly mounted on one side, close to the clamping groove, of the connecting block, and the clamping block is a parallelogram block and clamped inside the clamping groove.

Preferably, the arc-shaped ring is an arc-shaped block

Preferably, the gas outer nozzle comprises an outer annular air pipe, the outer annular air pipe is connected to the inside of the first clamping hole in a clamped mode, a fourth connecting pipe is sleeved on the outer side of the outer annular air pipe, a fifth connecting pipe is fixedly mounted at one end, far away from the outer annular air pipe, of the fourth connecting pipe, and the fifth connecting pipe is a pipeline in a circular truncated cone shape.

Preferably, a stop block is fixedly installed inside the fourth connecting pipe, the stop block is an annular block, and the outer annular air pipe is arranged on the side edge of the fourth connecting pipe.

Advantageous effects

The utility model provides a low NOx burner based on flue gas inner loop. The method has the following beneficial effects:

(1) This low nitrogen combustor based on flue gas inner loop, this structure is sent into furnace burning with natural gas branch two tunnel, the effect of the convenient ignition of subtotal steady flame from central gas pipe input, most gas chamber is sent into respectively from excessive pipe of second and fifth connecting pipe blowout, make the gas expand and scatter, there is better mixed effect with the air, the air is sent into the combustor from supply-air duct and is also divided into two tunnel, partly send into connecting cylinder and send into furnace through middle flame dish and whirl blade, partly get into and send into furnace through the fifth connecting pipe in the outer loop gas pipe, effectual dispersion center air, the gaseous velocity of flow of straight-flow combustion head has been reduced, with the fine mixed after-burning of gas, combustion efficiency is improved.

(2) This low NOx burner based on flue gas inner loop has retrained the displacement of outer loop air pipe through the dog, and convenient audio-visually sets up the inside degree of depth of outer loop air pipe card income fourth connecting pipe, and convenient to use has strengthened the device's practicality.

(3) This low NOx burner based on flue gas inner loop is connected through second connecting pipe and first connecting pipe between outer loop gas pipe and the third connecting pipe, and convenient to use has strengthened the device's practicality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a partial structure of the outer annular air tube of the present invention;

FIG. 3 is a schematic view of a partial structure of the air outer chamber of the present invention;

FIG. 4 is a schematic view of a partial structure of the outer ring gas pipe of the present invention;

fig. 5 is an enlarged schematic view of a portion a in fig. 4 according to the present invention.

Illustration of the drawings:

1. an outer ring gas pipe; 2. an outer annular air tube; 3. a central gas pipe; 4. a flame disk; 5. a gas inner spray pipe; 6. an air outer cavity; 7. a gas chamber; 8. a connecting cylinder; 9. a swirl vane; 10. an inner barrel; 11. an arc-shaped ring; 12. installing a flange; 14. a central nozzle; 15. gas pores; 18. a first card hole; 19. a second card hole; 20. a first connecting pipe; 21. a second connecting pipe; 22. a third connecting pipe; 23. a first transition duct; 24. a second transition duct; 25. a first extrusion block; 26. a second extrusion block; 27. a card slot; 28. a clamping block; 29. connecting blocks; 30. a connecting ring; 31. a fourth connecting pipe; 32. a fifth connecting pipe; 33. and a stop block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example (b): a low-nitrogen burner based on flue gas internal circulation is disclosed, as shown in FIGS. 1-5, and comprises a central gas pipe 3, a central nozzle 14 is fixedly installed at the output end of the central gas pipe 3, the inside of the central nozzle 14 is communicated with the inside of the central gas pipe 3, a gas small hole 15 is opened on the circumference of the central nozzle 14 away from equal distance, a flame disk 4 is fixedly installed on the outside of the central nozzle 14, a burner shell is arranged on the outside of the flame disk 4, the burner shell comprises an inner cylinder 10, the inner cylinder 10 is a circular sleeve and is fixedly installed on the outer ring gas pipe 1 on the outside of the flame disk 4, one end of the flame disk 4 is fixedly connected with a gas inner nozzle 5 corresponding to the inside of the inner cylinder 10, an arc ring 11 is fixedly installed on the outside of the inner cylinder 10 at equal distance, a connecting cylinder 8 is fixedly installed on the end face of the arc ring 11, a mounting flange 12 is fixedly installed on the outside of the connecting cylinder 8, the mounting flange 12 is an annular disc, a gas cavity 7 is fixedly mounted at one end, away from the inner cylinder 10, of the mounting flange 12, corresponding to the outer side of the connecting cylinder 8, the gas cavity 7 is in a circular barrel shape, second clamping holes 19 are formed in the side face of the mounting flange 12, corresponding to the equidistant circumference of the gap between the connecting cylinder 8 and the gas cavity 7, the second clamping holes 19 are circular through holes, an air outer cavity 6 is fixedly mounted at one end, away from the inner cylinder 10, of the mounting flange 12, corresponding to the outer side of the gas cavity 7, the air outer cavity 6 is in a circular barrel shape, first clamping holes 18 are formed in the side face of the mounting flange 12, corresponding to the equidistant circumference of the gap between the gas cavity 7 and the air outer cavity 6, the first clamping holes 18 are circular through holes, swirl vanes 9 are fixedly mounted at one end, away from the gas inner nozzle 5, of the flame disc 4, and the swirl vanes 9 are not used in the prior art;

the gas inner spray pipe 5 is arranged inside the second clamping hole 19, and the gas outer spray pipe is arranged inside the first clamping hole 18;

the gas inner spray pipe 5 comprises an outer ring gas pipe 1, the outer ring gas pipe 1 is clamped inside a second clamping hole 19, one end of the outer ring gas pipe 1 is fixedly provided with a first connecting pipe 20, the first connecting pipe 20 is a circular-truncated-cone-shaped expanding pipe, the outer side of the first connecting pipe 20 is clamped with a second connecting pipe 21, the second connecting pipe 21 is a circular-truncated-cone-shaped expanding pipe, one end, away from the outer ring gas pipe 1, of the second connecting pipe 21 is fixedly provided with a third connecting pipe 22, the third connecting pipe 22 is a circular pipeline, one end, away from the second connecting pipe 21, of the third connecting pipe 22 is fixedly provided with a first transition pipe 23, and one end, away from the third connecting pipe 22, of the first transition pipe 23 is fixedly provided with a second transition pipe 24;

a connecting ring 30 is fixedly mounted on the outer side of the outer ring gas pipe 1, the connecting ring 30 is a circular ring-shaped block, a first extrusion block 25 is fixedly mounted on the end surface of the connecting ring 30 corresponding to the end surface of the second connecting pipe 21, the first extrusion block 25 is a ring-shaped block with an arc-shaped cross section, a second extrusion block 26 is fixedly mounted on the end surface of the connecting ring 30 corresponding to the position of the first extrusion block 25, and the second extrusion block 26 is an S-shaped block;

a clamping groove 27 is formed in the end face of the connecting ring 30, the clamping groove 27 is an annular block with a parallelogram cross section, a connecting block 29 is fixedly mounted on the outer side of the fourth connecting pipe 31, the connecting block 29 is an annular block with a triangular cross section, a clamping block 28 is fixedly mounted on one side, close to the clamping groove 27, of the connecting block 29, and the clamping block 28 is a parallelogram block and clamped inside the clamping groove 27;

the arc ring 11 is an arc block;

the gas outer spray pipe comprises an outer annular air pipe 2, the outer annular air pipe 2 is clamped in the first clamping hole 18, a fourth connecting pipe 31 is sleeved on the outer side of the outer annular air pipe 2, a fifth connecting pipe 32 is fixedly installed at one end, far away from the outer annular air pipe 2, of the fourth connecting pipe 31, and the fifth connecting pipe 32 is a circular truncated cone-shaped pipeline;

a stopper 33 is fixedly installed inside the fourth connection pipe 31, the stopper 33 is an annular block, and the outer annular air pipe 2 is arranged at the side of the fourth connection pipe 31.

The utility model discloses a theory of operation:

when the structure is used, natural gas is sent into a hearth to be combusted in two ways, a small part of the natural gas is input from the central gas pipe 3 to be convenient for ignition and flame stabilization, most of the natural gas is sent into the gas cavity 7 and is respectively sprayed out from the second transition pipe 24 and the fifth connecting pipe 32, so that the gas is expanded and dispersed, a better mixing effect is achieved with air, the air is sent into the combustor from the air supply pipeline and is also divided into two ways, one part of the air is sent into the connecting cylinder 8 and is sent into the hearth through the middle flame disc 4 and the swirl blades 9, and the other part of the air enters the outer ring gas pipe 1 and is sent into the hearth through the fifth connecting pipe 32, so that the central air is effectively dispersed, the gas flow rate of the straight-flow type combustion head is reduced, the gas is well mixed with the gas and then is combusted, and the combustion efficiency is improved;

the displacement of the outer annular air pipe 2 is restrained by the stop block 33, the depth of the outer annular air pipe 2 clamped into the fourth connecting pipe 31 is convenient and visual to set, the use is convenient, and the practicability of the device is enhanced.

The outer ring gas pipe 1 is connected with the third connecting pipe 22 through the second connecting pipe 21 and the first connecting pipe 20, so that the use is convenient, and the practicability of the device is enhanced.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Claims (8)

1. The utility model provides a low NOx burner based on flue gas inner loop, includes central gas pipe (3), its characterized in that: the gas burner is characterized in that a central nozzle (14) is fixedly mounted at the output end of the central gas pipe (3), the inside of the central nozzle (14) is communicated with the inside of the central gas pipe (3), the central nozzle (14) is far away from the equidistant circumference and is provided with a gas small hole (15), the outer side of the central nozzle (14) is fixedly mounted with a flame disc (4), the outer side of the flame disc (4) is provided with a burner shell, the burner shell comprises an inner cylinder (10), the inner cylinder (10) is a circular sleeve and is fixedly mounted on an outer ring gas pipe (1) of the flame disc (4), one end of the flame disc (4) corresponds to an inner fixedly connected gas inner spray pipe (5) of the inner cylinder (10), the outer side of the inner cylinder (10) is fixedly mounted with an arc ring (11), a connecting cylinder (8) is fixedly mounted on the end surface of the arc ring (11), the outer side of the connecting cylinder (8) is fixedly mounted with a mounting flange (12), the mounting flange (12) is an annular disc, one end, which is far away from the inner cylinder (10), corresponds to the outer side of the connecting cylinder (8), is provided with a gas cavity (7), the gas clamping hole (19) and a second clamping hole (19) is formed between the circular clamping hole, the one end that inner tube (10) was kept away from in mounting flange (12) corresponds the outside fixed mounting of gas chamber (7) has air exocoel (6), and air exocoel (6) are circular tubbiness, and first card hole (18) have been seted up to the side of mounting flange (12) corresponding gas chamber (7) and the equidistant circumference in clearance department between the air exocoel (6), and first card hole (18) are circular through-hole, and the one end fixed mounting that spray tube (5) was kept away from in the gas in flame dish (4) has whirl blade (9).

2. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 1, wherein: the inside of second card hole (19) is provided with interior spray tube of gas (5), and the inside of first card hole (18) is provided with the outer spray tube of gas.

3. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 2, wherein: spray tube (5) are including outer loop gas pipe (1) in the gas, outer loop gas pipe (1) joint is in the inside of second card hole (19), the one end fixed mounting of outer loop gas pipe (1) has first connecting pipe (20), first connecting pipe (20) are round platform form expander, the outside joint of first connecting pipe (20) has second connecting pipe (21), second connecting pipe (21) are round platform expander, the one end fixed mounting that outer loop gas pipe (1) was kept away from in second connecting pipe (21) has third connecting pipe (22), third connecting pipe (22) are circular pipeline, the one end fixed mounting that second connecting pipe (21) were kept away from in third connecting pipe (22) has first excessive pipe (23), the one end fixed mounting that third connecting pipe (22) were kept away from in first excessive pipe (23) has second excessive pipe (24).

4. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 3, wherein: the outer side fixed mounting of outer loop gas pipe (1) has go-between (30), go-between (30) are the annular piece of circle, the terminal surface fixed mounting that the terminal surface of go-between (30) corresponds second connecting pipe (21) has first extrusion piece (25), first extrusion piece (25) are that the cross section is curved annular piece, the terminal surface of go-between (30) corresponds the fixed position of first extrusion piece (25) and installs second extrusion piece (26), second extrusion piece (26) are the piece of "S" form.

5. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 4, wherein: draw-in groove (27) have been seted up to the terminal surface of go-between (30), draw-in groove (27) are parallelogram's annular piece for the cross section, and the outside fixed mounting of fourth connecting pipe (31) has connecting block (29), and connecting block (29) are triangle-shaped annular piece for the cross section, and connecting block (29) lean on one side fixed mounting through draw-in groove (27) to have fixture block (28), and fixture block (28) are parallelogram's piece and joint in the inside of draw-in groove (27).

6. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 5, wherein: the arc-shaped ring (11) is an arc-shaped block.

7. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 6, wherein: the outer spray tube of gas includes outer loop air pipe (2), and outer loop air pipe (2) joint has cup jointed fourth connecting pipe (31) in the inside of first calorie of hole (18) in the outside of outer loop air pipe (2), and the one end fixed mounting that outer loop air pipe (2) were kept away from in fourth connecting pipe (31) has fifth connecting pipe (32), and fifth connecting pipe (32) are the pipeline of round platform form.

8. The low-nitrogen combustor based on the internal circulation of flue gas as claimed in claim 7, wherein: the inside fixed mounting of fourth connecting pipe (31) has dog (33), and dog (33) are the annular piece, and outer ring air pipe (2) set up the side at fourth connecting pipe (31).

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