Combined burner for thermal insulation of chute of metallurgical furnace

Abstract

The utility model discloses a combined burner for thermal insulation of a chute of a metallurgical furnace, and relates to the technical field of auxiliary equipment of the metallurgical furnace. The device comprises a first-stage fluid pipe (1), a screwing device (2), a nozzle (3), a second-stage fluid pipe (4) and an air ring piece (5), two ends of the first-stage fluid pipe (1) are provided with external threads, one end is connected with a fuel pipeline, the other end is connected with the nozzle (3), and the screwing device (2) is sleeved and fixed outside the first-stage fluid pipe (1); the second-stage fluid pipe (4) is of a three-way structure, part of the first-stage fluid pipe (1) and the nozzle (3) are arranged in the second-stage fluid pipe (4), a first end of the first-stage fluid pipe (1) is a mixed gas outlet and extends beyond the nozzle (3) by a certain distance, an external thread of a second end is connected with a process air pipeline, and an internal thread of a third end is connected with the screwing device (2); and the air ring sheet (5) is sleeved outside the nozzle (3) and is fixed in the secondary fluid pipe (4). The combustor is convenient and fast to assemble, fuel and process air can be efficiently mixed, and the thermal insulation effect of the chute of the metallurgical furnace is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of metal smelting, and particularly relates to a combined burner for heat preservation of a metallurgical furnace chute. BACKGROUND

[0002] The statements in this section merely provide background information related to the technical solutions of the present application and can not constitute the prior art of the technical solutions of the present application.

[0003] As a key equipment in pyrometallurgy, the chute bears the role of conveying different smelting intermediate products to the next level smelting process, and is widely used in copper smelting and related smelting industries. It has the characteristics of simple structure, convenient use, simplicity and high efficiency. In the pyrometallurgical process, in order to ensure the uniformity of the internal temperature of the chute, maintain the good fluidity of the melt, and reduce the impact of the temperature drop of the copper water on the next process operation, heat preservation facilities will be used on the chute, such as a chute cover made of lightweight refractory material, and a natural gas burner will also be installed to provide heat to maintain the temperature stability of the melt in the chute. The current burner used in the chute is generally made of steel pipe directly, which has a simple structure and a low safety factor. In addition, the pipe body uses single fluid delivery, so that the natural gas cannot be fully burned, resulting in large fuel consumption, energy waste and cost increase. SUMMARY

[0004] To solve the above problems in the prior art, the utility model provides a combined burner for heat preservation of a metallurgical furnace chute, which comprises: a primary fluid pipe, a screwing device, a nozzle, a secondary fluid pipe and a wind ring piece. Both ends of the primary fluid pipe are in the form of external threads, one end is connected with a fuel pipe and the other end is connected with the nozzle. The screwing device is sleeved outside the primary fluid pipe and is fixedly connected with the primary fluid pipe. The secondary fluid pipe is in the form of a tee joint. A part of the primary fluid pipe and the nozzle are located in the secondary fluid pipe. The first end of the secondary fluid pipe is a mixed gas outlet, which extends beyond the nozzle by a distance. The second end of the secondary fluid pipe is in the form of external threads and is connected with a process air pipe. The third end of the secondary fluid pipe is in the form of internal threads and is connected with the screwing device. The wind ring piece is sleeved outside the nozzle and is fixedly installed in the secondary fluid pipe.

[0005] In one embodiment, one end of the screwing device is in the form of external threads and is used to connect with the third end of the secondary fluid pipe, and the other end is in the form of a hexagonal structure.

[0006] In one embodiment, the channel of the nozzle is in the form of five holes with a hole diameter of φ3mm and an included angle of 45° with the axial direction.

[0007] In one embodiment, the nozzle is connected to the primary fluid pipe by screwing.

[0008] In one embodiment, the contact surface between the primary fluid pipe and the fuel pipe is sealed by a spherical surface.

[0009] In one embodiment, the contact surface between the secondary fluid pipe and the process air pipe is sealed by a spherical surface.

[0010] In one embodiment, the air ring piece has 12 air channels with a diameter of 8mm.

[0011] In one embodiment, the screwing device is welded to the primary fluid pipe.

[0012] In one embodiment, the air ring piece is welded to the secondary fluid pipe.

[0013] The beneficial effects of the present application are: the burner is combined and connected, has good combustion effect, high fuel utilization rate, long service life, good sealing performance, and is easy to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0014] The embodiments of the present application will be further described below with reference to the accompanying drawings, in which:

[0015] Figure 1 is a structural schematic view of a combined burner for heat preservation of a metallurgical furnace chute according to one embodiment;

[0016] Figure 2 is a structural schematic view of a burner nozzle according to one embodiment;

[0017] Figure 3 is a structural schematic view of a burner screwing device according to one embodiment;

[0018] Figure 4 is a front view of a burner air ring piece according to one embodiment;

[0019] In the drawings, 1 is a primary fluid pipe, 2 is a screwing device, 3 is a nozzle, 4 is a secondary fluid pipe, and 5 is an air ring piece. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0021] Referring to Figure 1 , the combined burner for heat preservation of a metallurgical furnace chute according to one embodiment comprises: a primary fluid pipe 1, a screwing device 2, a nozzle 3, a secondary fluid pipe 4, and an air ring piece 5.

[0022] The first fluid pipe 1 is externally threaded at both ends, one end of which is connected with the fuel pipe, and the other end is connected with the nozzle 2. The screwing device 3 is sleeved outside the first fluid pipe 1 and is fixedly connected with the first fluid pipe 1. The second fluid pipe 4 is a three-way structure, a part of the first fluid pipe 1 and the nozzle 3 are located in the second fluid pipe 4, the first end of the second fluid pipe 4 is the mixed gas outlet, the first end extends beyond the nozzle 2 by a distance, the second end of the second fluid pipe 4 is externally threaded and is connected with the process air pipe, and the third end of the second fluid pipe 4 is internally threaded and is connected with the screwing device 3. The air ring 5 is sleeved outside the nozzle 2 and is fixedly installed in the second fluid pipe 4. The distance by which the first end of the second fluid pipe 4 extends beyond the nozzle 2 can be set according to actual needs, for example, the distance can be 5-15 cm.

[0023] In one embodiment, the screwing device 3 can be welded on the first fluid pipe 1.

[0024] In one embodiment, the air ring 5 can be welded and fixed in the second fluid pipe 4, for example, the edge of the air ring 5 is welded to the inner wall of the second fluid pipe 4.

[0025] In one embodiment, the contact surface between the first fluid pipe 1 and the fuel pipe is spherical, forming a spherical sealing body, to prevent leakage.

[0026] In one embodiment, the channel of the nozzle 2 is 5 holes, the hole diameter is φ3 mm, and the included angle with the axial direction is 45°.

[0027] In one embodiment, the nozzle 2 is connected with the first fluid pipe 1 in a threaded connection mode.

[0028] In one embodiment, one end of the screwing device 3 is externally threaded and is used for connecting with the third end of the second fluid pipe 4, and the other end is hexagonal in structure, facilitating fastening.

[0029] In one embodiment, the contact surface between the second fluid pipe 4 and the process air pipe is spherical, forming a spherical sealing body, to prevent air leakage.

[0030] In one embodiment, the air ring 5 adopts 12 air channels, the air channel hole diameter is φ8 mm, and the air ring 5 forms secondary air channels with the first fluid pipe 1.

[0031] The working mode of the combined burner is as follows: the fuel pipe is installed in the process air pipe, the process air forms a plurality of air channels through the air ring, and the fuel is sprayed out through the nozzle of the combined burner, and then is further mixed in the front end cavity of the second fluid pipe and is sprayed out.

[0032] The utility model discloses beneficial effect is: combustor combination connection, combustion effect is good, fuel utilization rate is high, service life is long, sealing performance is good, easy to overhaul maintenance.

[0033] Reference made herein to "various embodiments", "some embodiments", "one embodiment" or "an embodiment" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in various embodiments", "in some embodiments", "in one embodiment" or "in an embodiment" or the like in the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It has to be understood that the particular features, structures, or characteristics shown in or described with respect to one embodiment can be combined, in any suitable manner, with the particular features, structures, or characteristics shown in or described with respect to one or more others of the embodiments without limitation, as long as the combination is not illogical or impossible. Expressions such as "based on", "according to", "by means of", or "using" appearing in the text mean non-exclusive, i.e. "based on A" can cover "based on A only" but also "based on A and B", unless the context clearly indicates otherwise. In the present application, some of the illustrative operational steps are described in a certain order for the sake of clarity, but it is understood by those skilled in the art that each of these operational steps is not necessarily essential, and some of the steps can be omitted or replaced by other steps. These operational steps also do not have to be executed in the order shown, on the contrary, some of these operational steps can be executed in a different order or in parallel, as long as the new execution manner is not illogical or impossible.

[0034] Some example embodiments of the utility model are described above, it can be understood that the above-mentioned embodiments are only for explaining the utility model, and do not constitute the limitation to the protection scope of the utility model. The features in these embodiments can be recombined in a suitable manner, and the scheme obtained thereby is still within the protection scope required by the utility model. Based on the above-mentioned embodiments, all other embodiments obtained by those skilled in the art without making creative labor, i.e. all modifications, equivalent replacements and improvements etc. made within the spirit and principles of the present application, are also within the protection scope required by the utility model.

Claims

1. A combined burner for the heat preservation of a metallurgical furnace trough, characterized in that, It includes: Primary fluid pipe (1), screwing device (2), nozzle (3), secondary fluid pipe (4), wind ring piece (5), one end of the primary fluid pipe (1) is in the form of external thread, which is connected with fuel pipe, the other end is connected with the nozzle (3), the screwing device (2) is sleeved outside the primary fluid pipe (1) and is fixedly connected with the primary fluid pipe (1), the secondary fluid pipe (4) is a three-way structure, a part of the primary fluid pipe (1) and the nozzle (3) are located in the secondary fluid pipe (4), the first end of the secondary fluid pipe (4) is a mixed gas outlet, which extends beyond the nozzle (3) by a distance, the second end of the secondary fluid pipe (4) is in the form of external thread and is connected with process air pipe, the third end of the secondary fluid pipe (4) is in the form of internal thread and is connected with the screwing device (2), the wind ring piece (5) is sleeved outside the nozzle (3) and is fixedly installed in the secondary fluid pipe (4).

2. The combination burner of claim 1, wherein, One end of the screwing device (2) is in the form of external thread and is connected with the third end of the secondary fluid pipe (4), the other end is in the form of hexagonal structure.

3. The combination burner of claim 1, wherein, The channel of the nozzle (3) is 5 holes with a diameter of φ3mm and an angle of 45° with the axial direction.

4. The combination burner of claim 1, wherein, The nozzle (3) is connected with the primary fluid pipe (1) in the form of thread connection.

5. The combination burner of claim 1, wherein, The contact surface between the primary fluid pipe (1) and the fuel pipe is in the form of spherical sealing.

6. The combination burner of claim 1, wherein, The contact surface between the secondary fluid pipe (4) and the process air pipe is in the form of spherical sealing.

7. The combination burner of claim 1, wherein, The wind ring piece (5) is in the form of 12 air channels with a diameter of φ8mm.

8. The combination burner of claim 1, wherein, The screwing device (2) is welded on the primary fluid pipe (1).

9. The combination burner of claim 1, wherein, The wind ring piece (5) is welded and fixed in the secondary fluid pipe (4).

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