Pure oxygen combustion scrap steel preheating equipment in steel ladle

Abstract

The utility model discloses pure oxygen combustion scrap steel preheating equipment in a steel ladle, which belongs to the technical field of steel ladle baking and particularly comprises a steel ladle body, a ladle cover body and a burner body, the ladle cover body is arranged above the steel ladle body, and the burner body is fixedly connected onto the ladle cover body; the burner body comprises a burner block and a burner main pipe, a pre-combustion chamber is arranged in the burner block, a nozzle of the burner main pipe extends into the pre-combustion chamber, a burner shell is arranged on the outer side of the burner main pipe, a heat storage chamber is formed between the burner shell and the burner main pipe, and a gas pipeline connector is arranged on the burner shell. An air pipeline and a flue gas pipeline are arranged on the burner shell, the other end of the air pipeline is connected with an air reversing valve, and the other end of the flue gas pipeline is connected with a flue gas reversing valve; the utility model has the advantages that the service life is long, the operation is very flexible, and mechanical faults frequently occurring in heat accumulating type combustion are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the steel ladle roasting technical field, concretely relates to the pure oxygen combustion scrap steel preheating equipment in the steel ladle. BACKGROUND

[0002] Steel ladle roaster refers to the device for roasting the steel ladle before being newly built and before containing molten steel, also called ladle roaster. Steel ladle roasting is one of the main links in the steelmaking production process. The performance of the roasting device has great influence on the converter tapping temperature, steelmaking operation rate, furnace life, etc. Steel ladle roasting is between the steelmaking and casting processes, and the temperature of the steel ladle roasting plays an important role in coordinating the whole production, and is more important for continuous casting production.

[0003] In the design of the existing steel ladle roaster using two regenerative burners, the air, flue gas and gas reversing are integrated together when using the centralized control reversing valve, which mechanically ensures the synchronization of the gas and air reversing, but does not ensure the sealing of the gas reversing, and the centralized control reversing valve still has a certain failure rate. UTILITY MODEL CONTENT

[0004] To solve the problems in the above background art, the utility model provides the pure oxygen combustion scrap steel preheating equipment in the steel ladle, which has high service life, very flexible operation, and greatly reduces the mechanical failure of the regenerative combustion centralized control.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: the pure oxygen combustion scrap steel preheating equipment in the steel ladle, which comprises a steel ladle body, a ladle cover body and a burner body, the ladle cover body is arranged above the steel ladle body, and the burner body is fixedly connected to the ladle cover body.

[0006] The burner body comprises a burner brick and a burner main pipe, a precombustion chamber is arranged in the burner brick, the nozzle of the burner main pipe extends into the precombustion chamber, an air pipe and a flue gas pipe are arranged on the burner shell, the other end of the air pipe is connected with an air reversing valve, and the other end of the flue gas pipe is connected with a flue gas reversing valve.

[0007] The burner shell is provided with an air pipe and a flue gas pipe, the other end of the air pipe is connected with an air reversing valve, and the other end of the flue gas pipe is connected with a flue gas reversing valve.

[0008] Preferably, the burner main pipe is provided with a natural gas pipe interface and an oxygen pipe interface.

[0009] Preferably, it also includes an air filtration mechanism, which includes a filter cartridge and a filter. The filter cartridge is provided with an air inlet pipe and an air outlet pipe. The air outlet pipe is connected to the air inlet end of the air pipe. The filter is located above the air outlet pipe and inside the filter cartridge.

[0010] Preferably, the filter includes a first filter layer, a second filter layer, and a third filter layer, which are distributed sequentially from top to bottom. Each of the first filter layer, the second filter layer, and the third filter layer is fixedly connected to a mounting frame, and a fixing frame is detachably connected to the mounting frame. The fixing frame is fixedly connected to the inner wall of the filter cylinder.

[0011] Preferably, the first filter layer is a filter mesh layer, the second filter layer is an activated carbon adsorption layer, and the third filter layer is a desiccant layer.

[0012] Preferably, the bottom of the filter cartridge is detachably connected to a cartridge cover.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model, through the setting of a gas pipeline interface, an air reversing valve, and a flue gas reversing valve, allows the gas to be reversed without reversing, while the air and flue gas are reversed simultaneously. Since the air sealing is not as strict as that of the gas reversing valve, the design of its centralized control reversing valve can reduce its sealing performance. Therefore, the design of its centralized control reversing valve has a very long service life and operates very flexibly, ensuring a significant reduction in the mechanical failures that often occur in regenerative combustion. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of the present utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the burner body in Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the burner body in Embodiment 2 of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the air filtration mechanism in Embodiment 2 of this utility model;

[0020] In the diagram: 1. Ladle body; 2. Ladle cover body; 3. Burner body; 301. Burner brick; 302. Pre-combustion chamber; 303. Burner main pipe; 304. Burner shell; 305. Regenerator chamber; 306. Gas pipeline interface; 307. Air reversing valve; 308. Flue gas reversing valve; 309. Natural gas pipeline interface; 310. Oxygen pipeline interface; 4. Air filtration mechanism; 401. Filter cylinder; 402. Inlet pipe; 403. Outlet pipe; 404. First filter layer; 405. Second filter layer; 406. Third filter layer; 407. Ladle cover. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figures 1-2 This embodiment provides the following technical solution: a preheating device for pure oxygen combustion of scrap steel in a steel ladle, including a steel ladle body 1, a ladle cover body 2 and a burner body 3. The ladle cover body 2 is located above the steel ladle body 1, and the burner body 3 is fixedly connected to the ladle cover body 2.

[0024] The burner body 3 includes a burner brick 301 and a burner main pipe 303. A pre-combustion chamber 302 is provided inside the burner brick 301. The nozzle of the burner main pipe 303 extends into the pre-combustion chamber 302. Through the pre-combustion chamber 302, it is ensured that the fuel and air can be fully mixed and the combustion process can be completed in a relatively small space.

[0025] A burner housing 304 is provided on the outside of the burner main pipe 303. A heat storage chamber 305 is formed between the burner housing 304 and the burner main pipe 303. The heat storage chamber 305 is used to improve combustion efficiency and reduce energy consumption. It recovers heat from the exhaust gas to preheat the air or fuel entering the combustion chamber, thereby achieving energy saving.

[0026] The burner main pipe 303 is equipped with a natural gas pipeline interface 309 and an oxygen pipeline interface 310. Through the natural gas pipeline interface 309 and the oxygen pipeline interface 310, fuel can be supplied to the burner main pipe 303 according to its working needs.

[0027] The burner housing 304 is provided with a gas pipeline interface 306. Through the provided gas pipeline interface 306, it can be ensured that the gas can be smoothly delivered into the burner body 3 to provide the necessary fuel for the combustion process.

[0028] An air duct and a flue gas duct are provided on the burner housing 304. An air reversing valve 307 is connected to the other end of the air duct, and a flue gas reversing valve 308 is connected to the other end of the flue gas duct.

[0029] In some embodiments, through the gas pipeline interface 306, air reversing valve 307, and flue gas reversing valve 308, the gas does not switch directions, while the air and flue gas switch directions simultaneously. Since the air sealing is not as tight as that of the gas reversing valve, the design of the centralized control reversing valve can reduce its sealing performance. Therefore, the design service life of the centralized control reversing valve is very long, and its operation is very flexible, which greatly reduces the mechanical failures that often occur in regenerative combustion.

[0030] Example 2

[0031] Please see Figures 3-4 In order to remove various impurities in the air to protect the burner body 3 and improve combustion efficiency, an air filtration mechanism 4 is also included. The air filtration mechanism 4 includes a filter cylinder 401 and a filter. The filter cylinder 401 is provided with an air inlet pipe 402 and an air outlet pipe 403. The air outlet pipe 403 is connected to the air inlet end of the air pipe. The filter is set above the air outlet pipe 403 and located inside the filter cylinder 401. Through the filter cylinder 401, when the outside air enters the burner body 3 through the air reversing valve 307, it can be filtered first to avoid dust, grease and moisture contained in the air affecting the service life of the burner body 3.

[0032] The filter includes a first filter layer 404, a second filter layer 405, and a third filter layer 406, which are arranged sequentially from top to bottom. Each of the first, second, and third filter layers 404 and 405 is fixedly connected to a mounting frame, and a fixing frame is detachably connected to the mounting frame. The fixing frame is fixedly connected to the inner wall of the filter cylinder 401. In some embodiments, the first filter layer 404 is a filter mesh layer, the second filter layer 405 is an activated carbon adsorption layer, and the third filter layer 406 is a desiccant layer. Through the arrangement of the filter mesh layer, activated carbon adsorption layer, and desiccant layer, the incoming air can be filtered. Furthermore, the placement of the filter mesh layer, activated carbon adsorption layer, and desiccant layer further improves their filtration efficiency.

[0033] The bottom of the filter cartridge 401 is detachably connected to a cover 407. The cover 407 allows the filter cartridge 401 to be in an open or sealed state, which facilitates the replacement or cleaning of the first filter layer 404, the second filter layer 405 and the third filter layer 406, and always ensures the filtration effect on the air.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A preheating device for scrap steel using pure oxygen combustion inside a steel ladle, characterized in that: It includes a ladle body (1), a cover body (2) and a burner body (3), wherein the cover body (2) is disposed above the ladle body (1) and the burner body (3) is fixedly connected to the cover body (2); The burner body (3) includes a burner brick (301) and a burner main pipe (303). A pre-combustion chamber (302) is provided inside the burner brick (301). The nozzle of the burner main pipe (303) extends into the pre-combustion chamber (302). A burner shell (304) is provided on the outside of the burner main pipe (303). A heat storage chamber (305) is formed between the burner shell (304) and the burner main pipe (303). A gas pipeline interface (306) is provided on the burner shell (304). An air pipe and a flue gas pipe are provided on the burner shell (304). An air reversing valve (307) is connected to the other end of the air pipe, and a flue gas reversing valve (308) is connected to the other end of the flue gas pipe.

2. The pure oxygen combustion scrap steel preheating equipment in a steel ladle according to claim 1, characterized in that: The burner main pipe (303) is provided with a natural gas pipeline interface (309) and an oxygen pipeline interface (310).

3. The pure oxygen combustion scrap steel preheating equipment in a steel ladle according to claim 1, characterized in that: It also includes an air filtration mechanism (4), which includes a filter cartridge (401) and a filter. The filter cartridge (401) is provided with an air inlet pipe (402) and an air outlet pipe (403). The air outlet pipe (403) is connected to the air inlet end of the air pipe. The filter is located above the air outlet pipe (403) and inside the filter cartridge (401).

4. The pure oxygen combustion scrap steel preheating equipment in a steel ladle according to claim 3, characterized in that: The filter includes a first filter layer (404), a second filter layer (405), and a third filter layer (406). The first filter layer (404), the second filter layer (405), and the third filter layer (406) are distributed from top to bottom. Each of the first filter layer (404), the second filter layer (405), and the third filter layer (406) is fixedly connected to a mounting frame. A fixing frame is detachably connected to the mounting frame, and the fixing frame is fixedly connected to the inner wall of the filter cylinder (401).

5. The pure oxygen combustion scrap steel preheating equipment in a steel ladle according to claim 4, characterized in that: The first filter layer (404) is a filter mesh layer, the second filter layer (405) is an activated carbon adsorption layer, and the third filter layer (406) is a desiccant layer.

6. The pure oxygen combustion scrap steel preheating equipment in a steel ladle according to claim 3, characterized in that: The bottom of the filter cartridge (401) is detachably connected to a cartridge cover (407).

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