CN212481272U - Burner with a burner head - Google Patents

Abstract

The utility model provides a combustor relates to heating device technical field, the utility model provides a combustor, include: the combustor comprises a channel pipe and a combustor pipe group sleeved on the channel pipe; the passage pipe is adapted to the igniter and the compressed air nozzle, and the igniter and the compressed air nozzle are alternatively detachably inserted into the passage pipe. The utility model provides a combustor, some firearm insert locate the passageway intraductal after lighting flame, can take some firearm out and insert the compressed air shower nozzle and locate in the passageway intraductal, can make the buggy disperse through compressed air, and then make the combustor be applicable to low heat value coal gas and buggy mixed combustion.

Description

Burner with a burner head

Technical Field

The utility model belongs to the technical field of heating device technique and specifically relates to a combustor is related to.

Background

The multi-air-channel combustor for the lime rotary kiln is one of key equipment of the lime kiln of the steel plant, and the quality of the performance of the equipment directly influences the product quality, the environmental protection, the energy consumption and the economic benefit of the lime kiln of the steel plant. At present, most of multi-air-channel combustors use coal powder as fuel or coal powder and coal gas dual fuel provide heat energy for a lime calcining system, but the application of low-calorific-value coal gas is restricted. The working principle of the pulverized coal gas burner is that high-speed jet wind and high-speed rotational flow wind, and central wind and low-speed coal feeding wind are utilized to form large-speed difference jet flow, so that the air flow conversion and mixing performance at the front part of the burner are optimized, and uniform coal feeding, full combustion and controllable combustion flame are formed; in a lime plant for providing lime for iron and steel metallurgy enterprises, cheap low-heat-value gas can be obtained as fuel, the gas is possibly insufficient or deficient in flow rate due to reasons such as maintenance and the like, so that coal powder is poorly mixed, the flame shape does not reach the standard, and the means for enhancing mixing by adding the cyclone device to the coal powder is frequently required to be maintained due to abrasion, so that the method is unacceptable in a lime rotary kiln production process requiring long-term continuous operation, and the application of the low-heat-value gas in the production of a lime kiln is restricted. However, the prior art lacks burners that can be applied to limekilns and that use low heating value gas.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combustor is applicable to low heat value coal gas and buggy co-combustion, and some firearm and compressed air shower nozzle can insert respectively and locate the passageway pipe.

In a first aspect, the present invention provides a burner, comprising: the combustor comprises a channel pipe and a combustor pipe group sleeved on the channel pipe;

the passage pipe is adapted to an igniter and a compressed air nozzle, and the igniter and the compressed air nozzle are alternatively detachably inserted into the passage pipe.

With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the burner tube set includes a central air tube, the central air tube is coaxial with the channel tube, and the channel tube is installed on the central air tube sleeve;

a first annular cavity is formed between the central air duct and the channel tube.

In combination with the first possible implementation manner of the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein an end of the passage pipe is connected to a ring plate, the ring plate covers the first annular cavity, and the ring plate is provided with a through hole.

With reference to the first possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the burner tube set further includes a coal air duct, the coal air duct is coaxial with the channel tube, and the coal air duct is sleeved with the central air duct;

and a second annular cavity is formed between the coal air pipe and the central air pipe.

With reference to the third possible implementation manner of the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the burner tube set further includes a gas tube, the gas tube is coaxial with the coal air tube, and the gas tube sleeve is provided with the coal air tube;

and a third annular cavity is formed between the coal gas pipe and the coal gas pipe.

With reference to the fourth possible implementation manner of the first aspect, the present invention provides a fifth possible implementation manner of the first aspect, wherein a gas cyclone is disposed between the gas pipe and the gas pipe.

With reference to the fourth possible implementation manner of the first aspect, the present invention provides a sixth possible implementation manner of the first aspect, wherein the burner tube set further includes a cyclone air tube, the cyclone air tube is coaxial with the gas tube, and the gas tube is sleeved with the cyclone air tube;

and a fourth annular cavity is formed between the rotational flow air pipe and the gas pipe.

In combination with the sixth possible implementation manner of the first aspect, the utility model provides a seventh possible implementation manner of the first aspect, wherein the gas pipe and an air deflector arranged between the cyclone air pipes, the air deflector having an included angle with a plane perpendicular to the axis of the gas pipe.

In combination with the sixth possible implementation manner of the first aspect, the utility model provides an eighth possible implementation manner of the first aspect, wherein the burner tube set further includes an axial flow air tube, the axial flow air tube is coaxial with the rotational flow air tube, and the rotational flow air tube is sleeved with the axial flow air tube;

and a fifth annular cavity is formed between the axial flow air pipe and the rotational flow air pipe.

In combination with the first aspect, the present invention provides a ninth possible implementation manner of the first aspect, wherein an outer sheath is sleeved outside the burner tube group.

The embodiment of the utility model provides a following beneficial effect has been brought: adopt the combustor nest of tubes to establish the passageway pipe, passageway pipe adaptation is in some firearm and compressed air shower nozzle, and some firearm and compressed air shower nozzle alternative detachably insert and locate the passageway pipe, and some firearm insert locate in the passageway intraductal after lighting flame, can take out some firearm and insert the compressed air shower nozzle and locate in the passageway, can make the buggy disperse through compressed air, and then make the combustor be applicable to low heat value coal gas and buggy mixed combustion.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a burner provided in an embodiment of the present invention;

fig. 2 is a left side view of a burner according to an embodiment of the present invention;

fig. 3 is a sectional view of a burner according to an embodiment of the present invention in a state where a compressed air nozzle is drawn out;

fig. 4 is a schematic view of a compressed air nozzle of a combustor according to an embodiment of the present invention.

Icon: a 001-channel tube; 002-burner tube set; 201-central air duct; 202-a coal air duct; 203-gas pipe; 204-cyclone air pipe; 205-axial flow air duct; 003-compressed air shower nozzle; 301-jet orifice; 004-a first ring cavity; 005-ring plate; 501-through holes; 006-second annular cavity; 007-a third ring cavity; 008-gas swirler; 009-fourth annular cavity; 010-air deflectors; 011-fifth annular cavity; 012-outer sheath.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1, an embodiment of the present invention provides a burner, including: a channel pipe 001 and a burner pipe set 002 sleeved on the channel pipe 001; the passage pipe 001 is fitted to the igniter and the compressed air blowing head 003, and the igniter and the compressed air blowing head 003 are alternatively detachably inserted into the passage pipe 001.

Specifically, the igniter is inserted into the passage tube 001, and the igniter can be pulled out from the passage tube 001 after the ignition flame is ignited. Through in inserting passageway pipe 001 with compressed air shower nozzle 003, spray compressed air through compressed air shower nozzle 003 to expand the buggy, and then ensure that buggy and air fully contact, in order to guarantee that the fuel can fully burn. The fuel can be mixed by coal gas and coal powder, the fuel is ignited by an igniter, and after the combustion is stable, the igniter is withdrawn and replaced by a compressed air nozzle 003.

In the embodiment of the present invention, the burner tube set 002 includes a central air tube 201, the central air tube 201 is coaxial with the channel tube 001, and the channel tube 001 is sleeved on the central air tube 201; a first annular cavity 004 is formed between the central ductwork 201 and the channel tube 001.

Specifically, the first annular cavity 004 serves as a central air duct, the compressed air nozzles 003 introduce compressed air into the central air duct, pulverized coal is dispersed by the compressed air, and flame can be adjusted by adjusting the flow rate of the compressed air nozzles 003.

As shown in fig. 1, 2 and 3, the end of the passage tube 001 is connected to the annular plate 005, the annular plate 005 covers the first annular cavity 004, and the annular plate 005 is provided with the through hole 501.

Specifically, the annular plate 005 is provided with a plurality of through holes 501 along the circumferential direction, and the plurality of through holes 501 are arranged at intervals along the circumferential direction. The through hole 501 is matched with the compressed air nozzle 003, and the jet flow of the compressed air does not influence the passing of central wind.

Further, the burner tube set 002 further includes a coal air tube 202, the coal air tube 202 is coaxial with the channel tube 001, and the central air tube 201 is sleeved with the coal air tube 202; a second annular chamber 006 is formed between the coal air duct 202 and the central air duct 201.

Specifically, the second annular chamber 006 is used as a coal air passage, and pulverized coal can be dispersed in the second annular chamber 006 under the action of compressed air, so that the pulverized coal and air can be sufficiently mixed, and sufficient combustion can be realized.

Further, the burner tube set 002 further comprises a gas pipe 203, the gas pipe 203 is coaxial with the coal gas pipe 202, and the coal gas pipe 202 is sleeved with the gas pipe 203; a third annular cavity 007 is formed between the gas pipe 203 and the coal air pipe 202.

Specifically, the third annular cavity 007 may serve as a gas channel, gas is dispersed in the third annular cavity 007, and the gas and air are sufficiently mixed, so that sufficient combustion is achieved.

Further, a gas swirler 008 is arranged between the coal air pipe 202 and the gas pipe 203.

Specifically, the gas swirler 008 may direct the gas in the third annular cavity 007 to flow around the coal wind pipe 202, so that the gas and the air are fully mixed. The coal gas is arranged on the outer ring of the pulverized coal, when the coal gas amount is sufficient, the supply of swirling air can be reduced, and the fuel consumption can be further reduced because the swirling air is not preheated.

Further, the burner tube set 002 further comprises a cyclone air tube 204, the cyclone air tube 204 is coaxial with the gas tube 203, and the gas tube 203 is sleeved with the cyclone air tube 204; a fourth annular cavity 009 is formed between the cyclone air duct 204 and the gas duct 203.

Specifically, the fourth annular cavity 009 serves as a swirling air passage, and in order to generate swirling air in the swirling air passage, a swirling air pipe 204 having a wedge-shaped cross section is sleeved on the outer periphery of the end of the gas pipe 203.

Further, an air guide plate 010 is arranged between the gas pipe 203 and the cyclone air pipe 204, and an included angle is formed between the air guide plate 010 and a plane perpendicular to the axis of the gas pipe 203.

Specifically, a plurality of air deflectors 010 are arranged, and the plurality of air deflectors 010 are arranged at intervals along the circumferential direction of the cyclone air pipe 204. The plurality of air deflectors 010 guides the air flow so that the air in the fourth cavity 009 flows around the gas pipe 203.

Further, the burner tube set 002 further includes an axial flow air duct 205, the axial flow air duct 205 is coaxial with the rotational flow air duct 204, and the rotational flow air duct 204 is sleeved with the axial flow air duct 205; a fifth annular cavity 011 is formed between axial flow duct 205 and swirl duct 204.

Specifically, an air duct end cover for sealing the fifth annular cavity 011 is arranged at the end of the axial flow air pipe 205, a plurality of circular holes are arranged on the air duct end cover, and the plurality of circular holes are arranged on the air duct end cover at intervals around the axis of the axial flow air pipe 205. The central wind, the rotational flow wind and the axial flow wind are respectively ejected out through the first annular cavity 004, the fourth annular cavity 009 and the fifth annular cavity 011, so that power is provided for diffusion of mixed fuel, and a five-channel combustor suitable for the lime rotary kiln is formed.

Further, an outer sheath 012 is sleeved outside the burner tube set 002.

Specifically, the outer sheath 012 is formed outside the burner tube set 002 by casting, and the burner tube set 002 is wrapped by the outer sheath 012, so as to protect the burner tube set 002.

As shown in fig. 1 and 4, the compressed air blowing head 003 has a plurality of injection holes 301, and the plurality of injection holes 301 are provided at intervals along a spiral line extending in the circumferential direction of the compressed air blowing head 003. Specifically, the compressed air is injected through the plurality of injection holes 301, and the compressed air can be surely injected dispersedly around the compressed air injection head 003.

It should be noted that the outlet of the gas channel is recessed inwards along the axis of the burner, and the overflowed coal dust can be accumulated at the outlet of the gas channel, so that the accumulated coal dust can be cleaned conveniently.

In the conventional technology, the third annular cavity 007 (gas channel) is narrow and can still form a qualified flame shape when no gas exists, while the third annular cavity 007 (gas channel) suitable for low-calorific-value gas is wide and can not form a qualified flame shape when no gas exists due to the fact that the swirling wind is far away from the pulverized coal. The shape of the flame (diameter, length, high temperature zone and other parameters) has decisive influence on the production energy consumption and the product quality, the state of the qualified flame shape can not be formed, and the burner can not be normally produced even if the burner can maintain combustion. The working principle of the burner provided by the embodiment is as follows:

in order to make the lower calorific value gas with larger unit volume suitable for the burner, a third annular cavity 007 (gas channel) with larger width (100 mm-150 mm) is adopted, the second annular cavity 006 is used as a pulverized coal channel, the fourth annular cavity 009 is used as a cyclone air channel, and compressed air is sprayed through a compressed air nozzle 003, so that pulverized coal is pushed to reach the cyclone air channel, the cyclone air and the pulverized coal can be fully contacted and mixed, and the flame shape meeting the technological requirements is obtained.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A burner, comprising: the device comprises a channel pipe (001) and a burner pipe group (002) sleeved on the channel pipe (001);

the passage pipe (001) is adapted to an igniter and a compressed air nozzle (003), and the igniter and the compressed air nozzle (003) are alternatively detachably inserted into the passage pipe (001).

2. The burner according to claim 1, wherein the burner tube set (002) comprises a central air duct (201), the central air duct (201) is coaxial with the channel tube (001), and the central air duct (201) is sleeved on the channel tube (001);

a first annular cavity (004) is formed between the central air duct (201) and the channel tube (001).

3. A burner according to claim 2, characterised in that the end of the passage tube (001) is connected to an annular plate (005), the annular plate (005) covering the first annular chamber (004), and the annular plate (005) being provided with a through hole (501).

4. The burner of claim 2, wherein the burner tube set (002) further comprises a coal air duct (202), wherein the coal air duct (202) is coaxial with the passage tube (001), and the coal air duct (202) is sleeved with the central air duct (201);

a second annular cavity (006) is formed between the coal air pipe (202) and the central air pipe (201).

5. The burner of claim 4, wherein the burner tube set (002) further comprises a gas tube (203), the gas tube (203) is coaxial with the coal pipe (202), and the gas tube (203) is sleeved on the coal pipe (202);

a third annular cavity (007) is formed between the gas pipe (203) and the coal air pipe (202).

6. Burner according to claim 5, characterized in that a gas swirler (008) is provided between the gas duct (202) and the gas duct (203).

7. The burner of claim 5, wherein the burner tube set (002) further comprises a cyclone air tube (204), wherein the cyclone air tube (204) is coaxial with the gas tube (203), and the cyclone air tube (204) is sleeved on the gas tube (203);

a fourth annular cavity (009) is formed between the cyclone air pipe (204) and the gas pipe (203).

8. The burner according to claim 7, wherein an air deflector (010) is arranged between the gas pipe (203) and the cyclone air pipe (204), and the air deflector (010) forms an included angle with a plane perpendicular to the axis of the gas pipe (203).

9. The burner according to claim 7, wherein the burner tube set (002) further comprises an axial flow air pipe (205), the axial flow air pipe (205) is coaxial with the cyclone air pipe (204), and the axial flow air pipe (205) is sleeved on the cyclone air pipe (204);

and a fifth annular cavity (011) is formed between the axial flow air pipe (205) and the rotational flow air pipe (204).

10. Burner according to claim 1, characterized in that the burner tube group (002) is externally sheathed with an outer jacket (012).

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