Gas oxygen-enriched cyclone burner

Abstract

The utility model relates to a burner, in particular to a coal gas oxygen-enriched cyclone burner, which comprises an air spray pipe, a coal gas spray pipe, a rotational flow generating mechanism, a bluff body coal gas diverter and a gas mixing chamber, and can fully mix air, oxygen and coal gas, improve burning quality and save fuel, and a cyclone device is arranged at the front end of the air spray pipe. The cyclone device is provided with a certain number of fins and is designed according to a certain angle and direction, the cyclone device rotates at a high speed under the action of air pressure of the air spray pipe, air and oxygen or enriched oxygen are fully mixed, and vortex is formed; and then the gas is mixed with the gas which is sprayed by the gas spray pipe and diffused in the circumferential direction through the blunt body gas diverter with the angle, and the fully mixed gas enters the front end of the burner and then is sprayed into the furnace for burning.

Description

Technical Field

[0001] The utility model relates to a burner, in particular to a gas oxygen-enriched cyclone burner. Background Art

[0002] The existing burners, if they only rely on the automatic mixing of air and gas, have poor combustion effects, especially when using oxygen-enriched burners that can be fed with oxygen to assist combustion, which increases the cost but has limited improvement in combustion effects.

[0003] The patent document with application number 201110228013.0 discloses a dual swirl burner, in which an air side swirl blade is arranged on the air channel. During combustion, the air side swirl blade stirs the air to improve the mixing effect with the coal gas, thereby improving the combustion effect; the patent with application number 201810491769.6 discloses a dual fuel air vortex burner, in which a swirl blade device arranged in the air inlet cavity is used to make the air vortex, thereby improving the mixing speed and effect of gas and fuel oil. Both of the above two public patents make the air form a vortex during combustion so that the air can be better mixed with the gas, but because only the air is stirred, the mixing effect of air and gas can only be improved to a certain extent.

[0004] In view of the above problems, the utility model provides a coal gas oxygen-enriched cyclone burner, which further improves the mixing effect of air and fuel gas, thereby improving the combustion quality and making full use of oxygen when oxygen is introduced to assist combustion. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a coal gas oxygen-enriched cyclone burner, so that air, oxygen and fuel gas can be further mixed, thereby improving the combustion effect and combustion quality of the burner.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a gas oxygen-enriched cyclone burner, comprising an air nozzle, a gas nozzle and a swirl generating mechanism, wherein a mixed gas chamber is arranged inside the air nozzle, the injection end of the gas nozzle penetrates into the air nozzle and extends into the mixed gas chamber, the injection end of the gas nozzle is provided with a diversion structure, and the gas nozzle is communicated with the mixed gas chamber through the diversion structure; a stirring chamber is formed between the outer wall of the gas nozzle and the inner wall of the air nozzle, the stirring chamber is communicated with the mixed gas chamber, and the swirl generating mechanism is located in the stirring chamber and installed on the gas nozzle.

[0007] The high-pressure air from the air nozzle passes through the swirl generating mechanism and is stirred into a vortex and enters the mixed gas chamber. The gas from the gas nozzle is dispersed into the mixed gas chamber through the diversion structure. The air and gas can be better mixed, thereby improving the combustion effect of the burner. When the air nozzle is connected to the oxygen-enriched pipeline, the swirl generating mechanism can also mix the air with oxygen and then quickly mix it with the gas.

[0008] As an optional solution, the diversion structure is a blunt-body gas diverter, which is located at the front end of the gas nozzle and forms a diversion gap with the outlet end of the gas nozzle. The gas nozzle communicates with the mixed gas chamber through each diversion gap. The blunt-body gas diverter is at the outlet end of the gas nozzle and cooperates with the gas nozzle to form a diversion gap. After the gas is sprayed from the gas nozzle, the blunt-body gas diverter diffuses the gas in a circumferential direction and allows the gas to enter the mixed gas chamber from the diversion gap and be sprayed into the furnace for combustion.

[0009] As an optional solution, the mixed gas chamber is a conical chamber, and the inner diameter of the conical chamber gradually decreases from the inside to the outside. The mixed gas chamber is a conical chamber, which is conducive to the gathering and mixing of air and fuel gas, and is also conducive to flame concentration, thereby improving combustion quality.

[0010] As an optional solution, a heat-resistant lining is provided in the mixed gas chamber, the interior of the heat-resistant lining is a conical gas mixing chamber, and the blunt-body gas diverter and the injection end of the gas nozzle are both arranged in the mixed gas chamber. The heat-resistant lining can protect the air nozzle.

[0011] As an optional solution, the swirl generating mechanism includes a swirl sleeve and fins. The swirl sleeve is arranged on the gas nozzle and rotates relative to the gas nozzle. The outer end surface of the swirl sleeve is provided with a plurality of fins along the circumferential direction. The high-pressure air flow of the air nozzle can cooperate with the plurality of fins to drive the swirl generating mechanism to rotate, thereby achieving agitation of the air.

[0012] As an optional solution, the fins are arranged obliquely and the end surface of each fin facing away from the mixed gas chamber is provided with a windward end surface.

[0013] As an optional solution, a limit stopper is provided at the junction of the stirring chamber and the mixed gas chamber in the air nozzle, which can play a role in limiting the position of the swirl generating mechanism.

[0014] As an optional solution, a limit slot is provided on the gas nozzle, and the swirl sleeve is arranged in the limit slot.

[0015] As an optional solution, an air inlet is provided on the air nozzle, the air inlet is communicated with the stirring chamber, and the swirl generating mechanism is between the mixed gas chamber and the air inlet. The swirl generating mechanism is in the area between the air inlet and the mixed gas chamber, ensuring that the high pressure air can interact with the swirl generating mechanism before entering the mixed gas chamber.

[0016] As an optional solution, the end surface of the blunt-body gas diverter facing the gas nozzle is provided with a diverter end surface, and the diverter end surface is a conical surface, which can better achieve the gas diverter effect.

[0017] Compared with the prior art, the utility model has the following beneficial effects: 1. The burner of the utility model has a simple structure. The gas of the gas nozzle is dispersed into the mixed gas chamber through the diversion structure. The air of the air nozzle interacts with the swirl generating mechanism and enters the mixed gas chamber after being swirled. The air and the gas can be better mixed in the mixed gas chamber, thereby improving the combustion effect of the burner; 2. The mixed gas chamber is a conical chamber, which is not only conducive to the gathering and mixing of air and gas, but also conducive to the gathering and ejection of gas, thereby improving the flame intensity; 3. The swirl generating mechanism has a simple structure and cooperates with the high-pressure air in the air nozzle. When the air nozzle is connected to the oxygen supply equipment to realize combustion in an oxygen-rich environment, the swirl generating mechanism can also pre-mix the air and oxygen to ensure that the mixed gas can be fully mixed with the gas in the mixed gas chamber, thereby improving the combustion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of the external structure of the burner;

[0020] Figure 2 is a schematic diagram of the internal structure of the burner;

[0021] Figure 3 An exploded view of the burner;

[0022] In the figure: 1. air nozzle, 2. gas nozzle, 3. swirl generating mechanism, 4. mixed gas chamber, 5. blunt body gas diverter, 6. stirring chamber, 7. heat-resistant lining. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment: Gas oxygen-enriched cyclone burner, such as Figure 1-Figure 3 As shown, it includes an air nozzle 1, a gas nozzle 2 and a swirl generating mechanism 3. A mixed gas chamber 4 is arranged inside the air nozzle 1. The mixed gas chamber 4 is located at the end of the air nozzle 1. The injection end of the gas nozzle 2 penetrates the air nozzle 1 and extends into the mixed gas chamber 4. A splitter structure is arranged at the injection end of the gas nozzle 2. The gas nozzle 2 is communicated with the mixed gas chamber 4 through the splitter structure. The main function of the splitter structure is to disperse the gas in the gas nozzle 2 into the mixed gas chamber 4 to improve the mixing effect of the gas and air.

[0025] A stirring chamber 6 is formed between the outer wall of the gas nozzle 2 and the inner wall of the air nozzle 1. The stirring chamber 6 is connected to the mixed gas chamber 4. The swirl generating mechanism 3 is located in the stirring chamber 6 and installed on the gas nozzle 2. The swirl generating mechanism 3 is near the connection between the stirring chamber 6 and the mixed gas chamber 4. The main function is to stir the high-pressure air in the air nozzle 1. The high-pressure air entering the air nozzle 1 is stirred into a vortex state after passing through the swirl generating mechanism 3, and then enters the mixed gas chamber 4. The gas of the gas nozzle 2 is dispersed into the mixed gas chamber 4 by the diversion structure. The air in the vortex state and the dispersed gas in the mixed gas chamber 4 can be fully mixed, thereby effectively improving the combustion effect and combustion quality of the burner.

[0026] In this embodiment, the air nozzle 1 is used to connect to the air supply device. In addition, the air nozzle 1 can also be connected to the oxygen supply device at the same time or separately to enable the burner to perform oxygen-enriched combustion. The gas nozzle 2 is used to connect to the gas supply device. The gas includes common fuels such as coal gas and natural gas, and also includes liquid fuels such as petroleum that have been atomized. When the gas nozzle 2 is passed into the liquid fuel such as petroleum, it needs to cooperate with an atomizer, and the atomizer is used to atomize the liquid fuel before passing it into the gas nozzle 2.

[0027] See also Figure 1-Figure 3 As a further embodiment, the diversion structure is a blunt-body gas diverter 5, which is located outside the gas nozzle 2, and a diversion gap is formed between the blunt-body gas diverter 5 and the outlet end of the gas nozzle 2, and the gas nozzle 2 is connected to the mixed gas chamber 4 through each diversion gap. The gas sprayed from the gas nozzle 2 directly impacts the blunt-body gas diverter 5 and changes the spraying direction by the blunt-body gas diverter 5, so that it can be dispersed into the mixed gas chamber 4 through each diversion gap.

[0028] Furthermore, the end surface of the bluff gas diverter 5 facing the gas nozzle 2 is a conical surface. After the gas impacts the conical surface of the bluff gas diverter 5, it is guided by the conical surface and enters the mixed gas chamber 4 through the corresponding diversion gap.

[0029] The bluff-body gas diverter 5 is connected to the gas nozzle 2 or the air nozzle 1 through a plurality of connecting rods.

[0030] See also Figure 1-Figure 3 As a further embodiment, the mixed gas chamber 4 is a conical chamber, and the inner diameter of the conical chamber gradually decreases from the inside to the outside along the air nozzle 1. The injection end of the gas nozzle 2 is also in the conical chamber. Due to the continuous introduction of gas and high-pressure air, the flame of the gas and air in the conical chamber is flushed out of the conical chamber when burning. The structure of the conical chamber can not only gather the airflow and improve the mixing effect of air and gas, but also gather the flame, so that the flame is more concentrated and the combustion quality is better.

[0031] In some embodiments, a heat-resistant lining 7 is provided in the mixed gas chamber 4, and a conical chamber is provided inside the heat-resistant lining 7, which is the mixed gas chamber 4. The blunt-body gas diverter 5 and the injection end of the gas nozzle 2 are both provided in the mixed gas chamber. The gas sprayed from the gas nozzle 2 and the air from the air nozzle 1 are mixed in the mixed gas chamber. The heat-resistant lining 7 is made of refractory castable and plays a role in protecting the air nozzle 1.

[0032] See also Figure 2 and Figure 3 The swirl generating mechanism 3 includes a swirl sleeve and fins. The swirl sleeve is arranged on the gas nozzle 2 and rotates relative to the gas nozzle 2. The swirl sleeve is located on the gas nozzle 2 near the connection between the stirring chamber 6 and the mixed gas chamber 4. The outer end surface of the swirl sleeve is provided with a plurality of fins along the circumferential direction. The swirl sleeve and the plurality of fins are combined to form a cyclone device. The high-pressure air in the air nozzle 1 will pass through the swirl generating mechanism 3 when entering the mixed gas chamber 4 from the stirring chamber 6. The high-pressure air impacts the fins, thereby driving the swirl generating mechanism 3 to rotate rapidly. The rotation of the swirl generating mechanism 3 will stir the air, thereby causing the air in the air nozzle 1 to be stirred into a swirl state when entering the mixed gas chamber 4.

[0033] The fins on the swirl sleeve are arranged obliquely, and the end face of each fin facing away from the mixed gas chamber 4 is provided with a windward end face. The high-pressure air in the air nozzle 1 moves rapidly along the axial direction of the air nozzle 1, and the inclination of the fins causes a certain angle between the windward end face and the axial direction of the air nozzle 1. When the high-pressure air in the air nozzle 1 passes through the swirl generating mechanism 3, it passes between adjacent fins, and part of the high-pressure air impacts the windward end face, thereby driving the swirl generating mechanism 3 to rotate.

[0034] In some embodiments, a limit stopper is provided at the junction of the stirring chamber 6 and the mixed gas chamber 4 in the air nozzle 1. The limit stopper is a ring structure and is connected to the inner wall of the air nozzle 1 or the outer wall of the gas nozzle 2. The limit stopper is used to limit the movement range of the swirl generating mechanism 3 along the gas nozzle 2 to prevent the swirl generating mechanism 3 from entering the mixed gas chamber 4.

[0035] In some embodiments, a limiting slot is further provided on the gas nozzle 2 , and the swirl sleeve is provided in the limiting slot. The limiting slot serves to further limit the movement of the swirl generating mechanism 3 along the gas nozzle 2 .

[0036] The air nozzle 1 is provided with an air inlet, which is communicated with the turbulence chamber 6 and is connected to an air input pipe. In order to allow the high-pressure air to pass through the swirl generating mechanism 3 and then enter the mixed gas chamber 4, the swirl generating mechanism 3 is arranged between the mixed gas chamber 4 and the air inlet.

[0037] In some embodiments, the air inlet is arranged on the side of the air nozzle 1, a mixed gas chamber 4 is arranged at one end of the air nozzle 1, and an end plate is arranged at the other end. The end plate is an annular plate with a clearance hole arranged on the plate surface. The gas nozzle 2 passes through the clearance hole and is connected to the end plate.

[0038] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Gas oxygen-enriched cyclone burner, characterized by: The invention comprises an air nozzle (1), a gas nozzle (2) and a swirl generating mechanism (3), wherein a mixed gas chamber (4) is arranged inside the air nozzle (1), an injection end of the gas nozzle (2) penetrates the air nozzle (1) and extends into the mixed gas chamber (4), a flow splitting structure is arranged at the injection end of the gas nozzle (2), and the gas nozzle (2) communicates with the mixed gas chamber (4) through the flow splitting structure; a stirring chamber (6) is formed between the outer wall of the gas nozzle (2) and the inner wall of the air nozzle (1), and the stirring chamber (6) communicates with the mixed gas chamber (4); and the swirl generating mechanism (3) is located in the stirring chamber (6) and is mounted on the gas nozzle (2).

2. The gas oxygen-enriched cyclone burner according to claim 1, characterized in that: The flow splitting structure is a blunt-body gas splitter (5), which is located outside the gas nozzle (2) and forms a flow splitting gap with the outlet end of the gas nozzle (2). The gas nozzle (2) communicates with the mixed gas chamber (4) through each flow splitting gap.

3. The gas oxygen-enriched cyclone burner according to claim 2, characterized in that: The mixed gas chamber (4) is a conical chamber, and the inner diameter of the conical chamber gradually decreases from the inside to the outside.

4. The gas oxygen-enriched cyclone burner according to claim 3 is characterized in that: A heat-resistant lining (7) is arranged in the mixed gas chamber (4), a conical mixed gas chamber is arranged inside the heat-resistant lining (7), and the injection end of the blunt-body coal gas diverter (5) and the coal gas nozzle (2) are both arranged in the mixed gas chamber.

5. The gas oxygen-enriched cyclone burner according to any one of claims 1 to 4, characterized in that: The swirl generating mechanism (3) comprises a swirl sleeve and fins. The swirl sleeve is arranged on the gas nozzle (2) and rotates relative to the gas nozzle (2). The outer end surface of the swirl sleeve is provided with a plurality of fins along the circumferential direction.

6. The gas oxygen-enriched cyclone burner according to claim 5, characterized in that: The fins are arranged obliquely and the end surface of each fin facing away from the mixed gas chamber (4) is provided with a windward end surface.

7. The gas oxygen-enriched cyclone burner according to claim 5, characterized in that: A limit stop is provided at the junction of the stirring chamber (6) and the mixed gas chamber (4) in the air nozzle (1).

8. The gas oxygen-enriched cyclone burner according to claim 7, characterized in that: A limit slot is provided on the gas nozzle (2), and the swirl sleeve is arranged in the limit slot.

9. The gas oxygen-enriched cyclone burner according to claim 5, characterized in that: The air nozzle (1) is provided with an air inlet, which is communicated with the stirring chamber (6), and the swirl generating mechanism (3) is between the mixed gas chamber (4) and the air inlet.

10. The gas oxygen-enriched cyclone burner according to claim 5, characterized in that: The end surface of the blunt-body gas diverter (5) facing the gas nozzle (2) is provided with a diverter end surface, and the diverter end surface is a conical surface.

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