Trapezoidal heating furnace capable of delaying coking of furnace tube and used for needle coke production

Abstract

The utility model relates to the technical field of heating furnaces, in particular to a trapezoidal heating furnace for needle coke production, which is used for delaying coking of a furnace tube and comprises a heating furnace body, a chimney and supporting legs, the chimney is arranged at the upper end of the heating furnace body, and the supporting legs are arranged at the lower end of the heating furnace body. A furnace tube structure is arranged in the heating furnace body; fuel is injected into the side combustors through the fuel pipes, then the side combustors are opened, the fuel is sprayed out of the side combustors, high-temperature flames are generated, the high-temperature flames enter the extending plates, then the high-temperature flames are sprayed out through the fire nozzles, the high-temperature flames heat the furnace pipes, and therefore mixed oil in the furnace pipes is heated. Therefore, the temperature in the furnace tube is kept uniform through a combustion method of arranging a plurality of symmetrical burners, so that the problem of coking of the furnace tube caused by non-uniform heating of the furnace tube is prevented, and the stability of needle coke production is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating furnaces, and particularly relates to a trapezoidal heating furnace for delaying furnace tube coking in the production of needle coke. Background Art

[0002] Needle coke is a high-quality variety vigorously developed in carbon materials. It is a porous solid with a silver-gray appearance and metallic luster. In the production process, a mixed oil composed of asphalt, coking heavy oil, etc. is sent into the heating furnace for heating. Therefore, a trapezoidal heating furnace for delaying furnace tube coking in the production of needle coke needs to be set up to produce needle coke. However, the existing devices still have certain defects in use, such as:

[0003] The bottom-fired trapezoidal heating furnace disclosed in the patent number "CN201220177430.7". When this device is in use, through the optimization of the cross-sectional structure of the radiation chamber and the use of the wall-attached flame bottom-fired burner, the flame burns obliquely upward along the furnace side wall in a fan shape, improving the unevenness of the flue gas flow in the upper and lower parts of the furnace chamber. However, when the device is in use and heating the mixed oil, due to the uneven heating of the furnace tubes, coking problems are likely to occur inside the furnace tubes, resulting in changes in the slurry flow rate, and may also cause failures of the heating furnace, leading to production interruption, thus affecting the production efficiency and product quality of needle coke. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a trapezoidal heating furnace for delaying furnace tube coking in the production of needle coke to solve the above problems, improving the problem that the furnace tubes of the existing trapezoidal heating furnace for delaying furnace tube coking in the production of needle coke are prone to coking.

[0005] A trapezoidal heating furnace for delaying furnace tube coking in the production of needle coke includes a heating furnace body, a chimney and support feet: a chimney is arranged at the upper end of the heating furnace body, support feet are arranged at the lower end of the heating furnace body, and a furnace tube structure is arranged inside the heating furnace body;

[0006] The furnace tube structure includes a feed inlet, a furnace tube body and a discharge outlet. The furnace tube body is arranged inside the heating furnace body, the feed inlet is arranged at the upper end of the heating furnace body, and the discharge outlet is arranged on the side of the heating furnace body.

[0007] Preferably, the furnace tube body penetrates through the heating furnace body, one end of the feed inlet is connected to the upper end of the furnace tube body, and the side of the discharge outlet is connected to the side of the furnace tube body.

[0008] Preferably, a chimney is arranged at the upper end of the heating furnace body, and a filter adsorption layer is arranged inside the chimney.

[0009] Preferably, a support plate is provided on the side of the heating furnace body, and a side burner is provided at the upper end of the support plate.

[0010] Preferably, a fuel pipe is provided at the lower end of the side burner, the fuel pipe penetrates the support plate, an extension plate is provided inside the heating furnace body, and a burner nozzle is provided on the side of the extension plate.

[0011] Preferably, a radiation chamber is provided at the lower end inside the heating furnace body, a lower burner is provided at the lower end of the heating furnace body, and the lower burner penetrates the heating furnace body.

[0012] Preferably, a furnace cover is provided on the side of the heating furnace body, the furnace cover is rotatably connected to the heating furnace body, a sealing block is provided on the side of the furnace cover, a fixing plate is provided on the side of the furnace cover, and fixing bolts are provided on the side of the fixing plate.

[0013] Preferably, a limiting ring is provided on the inner wall of the heating furnace body, a limiting bolt is provided on the side of the limiting ring, the limiting bolt penetrates the limiting ring, and the limiting bolt is threadedly connected to the heating furnace body.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. Through the settings of the side burner, fuel pipe, extension plate and burner nozzle, when the device is in use, first inject fuel into the side burner through the fuel pipe, then turn on the side burner to make the side burner spray out fuel, generate high-temperature flames, make the high-temperature flames enter the inside of the extension plate, and then the burner nozzle sprays out the high-temperature flames to heat the furnace tube, so as to heat the mixed oil inside the furnace tube. In this way, by setting the combustion method of multiple symmetric burner nozzles, the temperature inside the furnace tube can be kept uniform, so as to prevent the furnace tube from being unevenly heated and causing the problem of coking of the furnace tube, thereby increasing the stability of needle coke production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall front view three-dimensional structure schematic diagram of the present utility model;

[0017] Figure 2 is the three-dimensional structure schematic diagram of the installation of the support plate and the side burner of the present utility model;

[0018] Figure 3 is the three-dimensional structure schematic diagram of the installation of the feed inlet and the furnace tube body of the present utility model;

[0019] Figure 4 is the three-dimensional structure schematic diagram of the installation of the chimney and the filter adsorption layer of the present utility model;

[0020] Figure 5This is a three-dimensional structural schematic diagram of the installation of the heating furnace body and the furnace cover of the present utility model.

[0021] In the figure: 1. Heating furnace body; 2. Chimney; 3. Support feet; 4. Furnace cover; 5. Support plate; 6. Sealing block; 7. Fixed plate; 8. Fixed bolt; 9. Furnace tube body; 10. Feed inlet; 11. Discharge outlet; 12. Side burner; 13. Limit ring; 14. Limit bolt; 15. Extension plate; 16. Burner nozzle; 17. Fuel pipe; 18. Radiation chamber; 19. Lower burner; 20. Filter adsorption layer; 21. Furnace tube structure. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] During specific implementation: As Figures 1-5 shown, a trapezoidal heating furnace for delaying furnace tube coking in the production of needle coke includes a heating furnace body 1, a chimney 2 and support feet 3: A chimney 2 is provided at the upper end of the heating furnace body 1, support feet 3 are provided at the lower end of the heating furnace body 1, and a furnace tube structure 21 is provided inside the heating furnace body 1;

[0024] The furnace tube structure 21 includes a feed inlet 10, a furnace tube body 9 and a discharge outlet 11. A furnace tube body 9 is provided inside the heating furnace body 1, a feed inlet 10 is provided at the upper end of the heating furnace body 1, and a discharge outlet 11 is provided on the side of the heating furnace body 1;

[0025] When the device is in use, a mixed oil composed of asphalt, coking heavy oil, etc. is injected into the interior of the furnace tube body 9 through the feed inlet 10, and then the heating furnace body 1 heats the furnace tube body 9, and then the heated mixed oil is discharged from the discharge outlet 11.

[0026] The furnace tube body 9 penetrates through the heating furnace body 1. One end of the feed inlet 10 is connected to the upper end of the furnace tube body 9, and the side of the discharge outlet 11 is connected to the side of the furnace tube body 9;

[0027] A chimney 2 is provided at the upper end of the heating furnace body 1, and a filter adsorption layer 20 is provided inside the chimney 2;

[0028] When the device is in use, the flue gas generated by the combustion of fuel by the lower burner 19 is discharged from the chimney 2. At this time, the harmful substances in the flue gas are adsorbed and filtered through the filter screen and activated carbon inside the filter adsorption layer 20 to prevent the flue gas discharged from the chimney 2 from polluting the environment.

[0029] A support plate 5 is arranged on the side of the heating furnace body 1, and a side burner 12 is arranged at the upper end of the support plate 5;

[0030] A fuel pipe 17 is arranged at the lower end of the side burner 12. The fuel pipe 17 penetrates through the support plate 5. An extension plate 15 is arranged inside the heating furnace body 1, and a burner nozzle 16 is arranged on the side of the extension plate 15;

[0031] When the device is in use, fuel is injected into the side burner 12 through the fuel pipe 17. Then, the side burner 12 is turned on to spray high-temperature flames through combustion. Subsequently, the high-temperature flames enter the inside of the extension plate 15, and the high-temperature flames are sprayed into the inside of the heating furnace body 1 through the burner nozzle 16 to uniformly heat the furnace tube body 9 and prevent the problem of coking of the furnace tube body 9 caused by uneven heating.

[0032] A radiation chamber 18 is arranged at the lower end inside the heating furnace body 1, and a lower burner 19 is arranged at the lower end of the heating furnace body 1. The lower burner 19 penetrates through the heating furnace body 1;

[0033] When the device is in use, fuel is injected into the lower burner 19. Then, the lower burner 19 sprays high-temperature flames and high-temperature flue gas through the fuel to heat from the bottom inside the heating furnace body 1 to heat the furnace tube body 9. Subsequently, the high-temperature flue gas floats upward to secondary heat the furnace tube body 9 with the temperature in the flue gas. Then, the heat-exchanged flue gas is discharged from the chimney 2

[0034] A furnace cover 4 is arranged on the side of the heating furnace body 1. The furnace cover 4 is rotatably connected to the heating furnace body 1. A sealing block 6 is arranged on the side of the furnace cover 4. A fixing plate 7 is arranged on the side of the furnace cover 4, and a fixing bolt 8 is arranged on the side of the fixing plate 7;

[0035] When the device is in use and the furnace tube body 9 needs to be maintained and cleaned, at this time, the fixing bolt 8 is screwed out, and then the furnace cover 4 is pulled open. Then, the staff maintains and cleans the furnace tube body 9. Then, the furnace cover 4 is covered again, and the fixing bolt 8 is screwed into the inside of the heating furnace body 1 and penetrates through the fixing plate 7 to fix the furnace cover 4, and the sealing block 6 seals the heating furnace body 1 to prevent heat from flowing out through the gap of the furnace cover 4.

[0036] A limiting ring 13 is arranged on the inner wall of the heating furnace body 1. A limiting bolt 14 is arranged on the side of the limiting ring 13. The limiting bolt 14 penetrates through the limiting ring 13, and the limiting bolt 14 is threadedly connected to the heating furnace body 1;

[0037] When the device is in use, the limit bolt 14 is screwed into the interior of the heating furnace body 1 to fix the limit ring 13, thereby fixing the furnace tube body 9 through the limit ring 13 to make the furnace tube body 9 more stable.

[0038] When the utility model is in use, the mixed oil is injected into the interior of the furnace tube body 9 through the feed inlet 10, so that the mixed oil enters the interior of the furnace tube body 9. Subsequently, the side burner 12 and the lower burner 19 are turned on to generate high-temperature flames to heat the furnace tube body 9, heat the material inside the furnace tube body 9, and heat the material to the required temperature. Subsequently, the heated material is discharged through the discharge outlet 11.

[0039] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A trapezoidal heating furnace for needle coke production that delays furnace tube coking, characterized in that, It includes a heating furnace body (1), a chimney (2) and support feet (3): A chimney (2) is provided at the upper end of the heating furnace body (1), support feet (3) are provided at the lower end of the heating furnace body (1), and a furnace tube structure (21) is provided inside the heating furnace body (1). The furnace tube structure (21) includes a feed inlet (10), a furnace tube body (9) and a discharge outlet (11). The furnace tube body (9) is provided inside the heating furnace body (1), the feed inlet (10) is provided at the upper end of the heating furnace body (1), and the discharge outlet (11) is provided on the side of the heating furnace body (1).

2. The trapezoidal heating furnace for needle coke production according to claim 1, which is used to delay the coking of furnace tubes, is characterized in that: The furnace tube body (9) penetrates through the heating furnace body (1). One end of the feed inlet (10) is connected to the upper end of the furnace tube body (9), and the side of the discharge outlet (11) is connected to the side of the furnace tube body (9).

3. The trapezoidal heating furnace for needle coke production that delays coking of furnace tubes according to claim 1, wherein: A chimney (2) is provided at the upper end of the heating furnace body (1), and a filter adsorption layer (20) is provided inside the chimney (2).

4. A trapezoidal heating furnace for needle coke production that delays furnace tube coking, as described in claim 1, wherein: A support plate (5) is provided on the side of the heating furnace body (1), and a side burner (12) is provided at the upper end of the support plate (5).

5. A trapezoidal heating furnace for needle coke production that delays coking of furnace tubes, characterized in that: A fuel pipe (17) is provided at the lower end of the side burner (12). The fuel pipe (17) penetrates through the support plate (5). An extension plate (15) is provided inside the heating furnace body (1), and a burner nozzle (16) is provided on the side of the extension plate (15).

6. A trapezoidal heating furnace for needle coke production that delays furnace tube coking, characterized in that: A radiation chamber (18) is provided at the lower end inside the heating furnace body (1), and a lower burner (19) is provided at the lower end of the heating furnace body (1). The lower burner (19) penetrates through the heating furnace body (1).

7. A trapezoidal heating furnace for needle coke production that delays furnace tube coking, as described in claim 1, characterized in that: A furnace cover (4) is provided on the side of the heating furnace body (1). The furnace cover (4) is rotatably connected to the heating furnace body (1). A sealing block (6) is provided on the side of the furnace cover (4), a fixing plate (7) is provided on the side of the furnace cover (4), and fixing bolts (8) are provided on the side of the fixing plate (7).

8. A trapezoidal heating furnace for needle coke production that delays furnace tube coking, characterized in that: A limiting ring (13) is provided on the inner wall of the heating furnace body (1). A limiting bolt (14) is provided on the side of the limiting ring (13). The limiting bolt (14) penetrates through the limiting ring (13), and the limiting bolt (14) is threadedly connected to the heating furnace body (1).

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