Semi-built-in labyrinth burner of regenerative heating furnace

Abstract

The utility model relates to the technical field of industrial heating furnace application, in particular to a semi-built-in labyrinth burner of a heat accumulating type heating furnace, and aims to solve the problems that in the using process of the burner of the heat accumulating type heating furnace at present, due to the influence of high temperature in the furnace, a plurality of parts of an external steel structure of the burner are cracked due to high-temperature deformation, and the service life of the burner is influenced. And finally, flue gas and flames in a hearth come out when the burners are reversed in turn, open flames appear around the burners, and large production safety risks are generated. The burner is mainly composed of a burner shell, a lining castable, a hard calcium silicate board, a groove, a mounting boss, reinforcing ribs and the like, the asbestos-free hard calcium silicate board is used for heat insulation and heat preservation, the bonding performance of the burner and a furnace wall refractory material is improved through an anchoring claw, after the mounting groove and the boss are poured with the furnace wall refractory material, a labyrinth sealing effect is formed between a furnace wall and the burner, and the service life of the furnace wall is prolonged. The convenience of replacement of the heat accumulator and online maintenance of the burner is effectively improved, the accident risk of furnace body operation is reduced, and the overall operation efficiency of the heating furnace is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial heating furnace application, in particular to a semi-built-in labyrinth burner of a heat storage heating furnace. Background Art

[0002] The rod heating furnace uses regenerative combustion technology to preheat both air and gas to about 1200°C, ensuring that the low calorific value blast furnace gas meets the temperature requirements for heating the steel billet when used in the heating furnace. The heating furnace is generally divided into three automatic temperature control sections, and each section adopts a sequence reversal to reduce furnace pressure fluctuations. The regenerative heating furnace burners are arranged on both sides of the heating furnace. The air regenerative burners and gas regenerative burners are arranged adjacent to each other on the left and right. The air gas and hot flue gas cross-flow horizontally on both sides of the heating furnace. The rod regenerative heating furnace is frequently started and stopped due to production conditions. The refractory materials in the furnace will explode or crack when the high ground temperature changes alternately. Among them, the joints between the regenerative burners and the furnace wall castings are the most prone to cracks. It is currently a bottleneck problem that is difficult to overcome in the field of industrial heating furnaces. After two or three years of service, the regenerative heating furnace developed large cracks at the joints between the regenerative burner and the cast refractory material of the furnace wall. The external steel structure of the burner was deformed in many places due to high temperature. During normal production, when the burners on both sides of the heating furnace were reversed, the gas, smoke and flames in the furnace would burst out from the cracks around the burner. The CO content around the heating furnace seriously exceeded the standard, and the high temperature around the burner was obvious and even generated open flames, posing a great safety risk. Utility Model Content

[0003] The utility model provides a semi-built-in labyrinth burner of a regenerative heating furnace to solve the problems existing in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A semi-built-in labyrinth burner of a heat storage heating furnace comprises a burner shell, a lining castable is provided on the inner side of the burner shell, asbestos-free hard calcium silicate board is filled between the lining castable and one circumferential side of the burner shell, a first groove is provided in the lining castable and the other circumferential side of the burner shell, a first mounting boss is provided on the side of the lining castable away from the burner shell, and a first cavity and a second cavity are sequentially penetrated on the inner side of the lining castable.

[0006] Furthermore, a third groove is provided on one side of the lining castable, and the asbestos-free hard calcium silicate board is clamped inside the third groove.

[0007] Furthermore, a second groove is provided on the circumferential side of the burner shell between the first groove and the asbestos-free hard calcium silicate board, and a plurality of reinforcing connecting ribs are fixedly and evenly distributed on the circumferential side of the burner shell near the second groove.

[0008] Furthermore, a plurality of anchor claws are fixedly provided on the circumferential side of the burner shell at the side portions of the first groove and the second groove.

[0009] Furthermore, the first cavity is arranged on a side close to the asbestos-free hard calcium silicate board, the second cavity is arranged on the other side of the lining castable, and a second mounting boss is further arranged on the side close to the first mounting boss.

[0010] The utility model has the following beneficial effects:

[0011] The utility model provides a semi-built-in labyrinth burner of a heat storage heating furnace, which is mainly composed of a burner shell, an inner lining castable, a hard calcium silicate board, a groove, a mounting boss and reinforcing ribs and other components. The asbestos-free hard calcium silicate board is used for heat insulation and heat preservation, and the anchor claws increase the bonding performance between the burner and the refractory material of the furnace wall. After the mounting grooves and the boss are cast with the refractory material of the furnace wall, a labyrinth sealing effect is formed between the furnace wall and the burner, which effectively improves the convenience of replacing the heat storage body and online maintenance of the burner, reduces the risk of accidents during furnace operation, ensures the overall operation efficiency of the heating furnace, and solves the problem that during the use of the burner of the heat storage heating furnace, the external steel structure of the burner is usually deformed and cracked in multiple places due to the influence of the high temperature in the furnace, which ultimately causes smoke and flames in the furnace to escape when the burner wheel sequence is reversed, and open flames are generated around the burner, resulting in a large production safety risk.

[0012] The built-in labyrinth burner in the utility model has a reasonable structural design and can be prefabricated separately. The burner shell is welded with steel plates and lined with lightweight castables. It has a small volume and high overall strength, and is easy to construct and install on site. The burner is installed on the furnace wall and continuously welded to the furnace wall steel plate. The burner and the furnace wall refractory material adopt a labyrinth seal with a good overall sealing effect. It is convenient to replace the heat storage body, and a separate burner can be maintained online, which reduces the risk of accidents and ensures the safe operation and overall life of the heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] The meanings of the reference numerals are as follows:

[0015] 1. Burner shell; 2. Lining castable; 3. Asbestos-free hard calcium silicate board; 4. Anchor claws; 5. Strengthening connecting ribs; 6. First groove; 7. First mounting boss; 8. Second groove; 9. Third groove; 10. Second mounting boss; 11. First cavity; 12. Second cavity. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] like Figure 1As shown, a semi-built-in labyrinth burner of a regenerative heating furnace comprises a burner shell 1, a lining castable 2 is provided on the inner side of the burner shell 1, an asbestos-free hard calcium silicate board 3 is filled between the lining castable 2 and one circumferential side of the burner shell 1, a first groove 6 is provided in the lining castable 2 and the other circumferential side of the burner shell 1, a first mounting boss 7 is provided on the side of the lining castable 2 away from the burner shell 1, and a first cavity 11 and a second cavity 12 are also sequentially opened on the inner side of the lining castable 2.

[0018] A third groove 9 is formed on one side of the lining castable 2 , and the asbestos-free hard calcium silicate board 3 is clamped inside the third groove 9 .

[0019] A second groove 8 is further provided on the circumferential side of the burner shell 1 between the first groove 6 and the asbestos-free hard calcium silicate board 3 , and a plurality of reinforcing connecting ribs 5 are further fixedly and evenly distributed on the circumferential side of the burner shell 1 close to the second groove 8 .

[0020] A plurality of anchor claws 4 are fixedly disposed on the circumferential side of the burner housing 1 at the sides of the first groove 6 and the second groove 8 .

[0021] The first cavity 11 is arranged on one side close to the asbestos-free hard calcium silicate board 3 , the second cavity 12 is arranged on the other side of the lining castable 2 , and a second mounting boss 10 is further arranged on the side close to the first mounting boss 7 .

[0022] The specific preparation and processing process of the utility model is as follows: first, a burner shell 1 is formed by welding with a steel plate to ensure that the first groove 6 and the second groove 8 are well welded and formed, and an asbestos-free hard calcium silicate board 3 is pasted in the burner shell 1, and then the mold is supported and the burner shell 1 is integrally cast with the lining castable 2, and after the lining castable 2 is cast, it is baked according to the refractory material performance to ensure that the first mounting boss 7 and the second mounting boss 10 are well cast and formed, and finally the anchor claw 4 and the reinforcing connecting rib plate 5 are welded on the burner shell 1 according to the design requirements, and finally the burner is prepared, which effectively solves the problem that during the use of the burner of the regenerative heating furnace, the external steel structure of the burner is usually cracked in multiple places due to the influence of the high temperature in the furnace, which eventually causes smoke and flames in the furnace to escape when the burner wheel sequence is reversed, and open flames appear around the burner, thereby generating a large production safety risk. Therefore, the burner has good practicality.

Claims

1. A regenerative heating furnace with a semi-built-in labyrinth burner, characterized by: The burner shell (1) comprises a burner casing (1), wherein a lining castable (2) is provided on the inner side of the burner casing (1), an asbestos-free hard calcium silicate board (3) is filled between the lining castable (2) and one circumferential side of the burner casing (1), a first groove (6) is provided on the lining castable (2) and the other circumferential side of the burner casing (1), a first mounting boss (7) is provided on the side of the lining castable (2) away from the burner casing (1), and a first cavity (11) and a second cavity (12) are sequentially formed through the inner side of the lining castable (2).

2. The semi-built-in labyrinth burner of a regenerative heating furnace according to claim 1 is characterized in that: A third groove (9) is provided on one side of the lining castable (2), and the asbestos-free hard calcium silicate board (3) is clamped inside the third groove (9).

3. The semi-built-in labyrinth burner of a regenerative heating furnace according to claim 1 is characterized in that: A second groove (8) is also provided on the circumferential side of the burner shell (1) between the first groove (6) and the asbestos-free hard calcium silicate board (3), and a plurality of reinforcing connecting ribs (5) are also fixedly and evenly distributed on the circumferential side of the burner shell (1) near the second groove (8).

4. The semi-built-in labyrinth burner of a regenerative heating furnace according to claim 3 is characterized in that: A plurality of anchor claws (4) are also fixedly provided on the circumferential side of the burner shell (1) at the side of the first groove (6) and the second groove (8).

5. The semi-built-in labyrinth burner of a regenerative heating furnace according to claim 1 is characterized in that: The first cavity (11) is arranged on a side close to the asbestos-free hard calcium silicate board (3), the second cavity (12) is arranged on the other side of the lining castable (2), and a second mounting boss (10) is also arranged on a side close to the first mounting boss (7).

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