Combustion device for rapid heat preservation of blast furnace body

Abstract

The utility model relates to blast furnace ironmaking technical field, especially a kind of combustion device of blast furnace body rapid heat preservation, including burner, connecting pipe, combustion air pipeline, coke oven gas pipeline and sealing cover, the burner be slender round tube, several holes are set on pipe wall, several holes are arranged with interval staggered, the tail end of burner is set connecting pipe, the tail part of connecting pipe is branch structure, the tail end of each branch is connected combustion air pipeline and coke oven gas pipeline respectively, sealing cover is set in the connecting position of connecting pipe and combustion air pipeline, coke oven gas pipeline, the ladder type sealing plug is set in the sealing cover, the utility model has the beneficial effect that: flame jet and go out and carry out roasting, heat preservation effect is extremely good, high sealing property, strong safety, combustion device can be made on site and easy to operate, and applicability is wide.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace ironmaking technology, and in particular to a combustion device for rapid heat preservation of the blast furnace body. Background Technology

[0002] A blast furnace typically has a service life of about 15 years. At the end of its service life, a major overhaul is required. During the overhaul, due to the large amount of work involved, even after the hearth and furnace body are overhauled, repairs to the furnace's periphery or other systems are not yet completed, and the blast furnace cannot meet the conditions for drying.

[0003] When the conditions for furnace drying are not available, the refractory materials and cooling equipment of the hearth and furnace body need to be insulated. Conventional blast furnace insulation measures include hot blast heating, coke heating, or electric heating. However, regardless of the type of blast furnace insulation, auxiliary heating equipment is required, which results in high heating and insulation costs, large resource consumption, complex operation, low efficiency, and high environmental pollution risks. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a combustion device for rapid heat preservation of blast furnace body. It can provide a combustion device for rapid heating and heat preservation of blast furnace body when the blast furnace is overhauled and the conditions for furnace baking are not met. The front end of the burner is provided with several holes so that the flames can be sprayed out for baking. The heat preservation effect is excellent, the sealing is high, the safety is strong, the combustion device can be made on site and is easy to operate, and has wide applicability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A combustion device for rapid heat preservation of a blast furnace body includes a burner, a connecting pipe, a combustion air pipeline, a coke oven gas pipeline, and a sealing cap. The burner is a slender cylindrical tube with several holes arranged alternately on its wall. A connecting pipe is installed at the end of the burner, and the tail of the connecting pipe has a branching structure. The end of each branch is connected to the combustion air pipeline and the coke oven gas pipeline, respectively. A sealing cap is installed at the connection point between the connecting pipe and the combustion air pipeline and the coke oven gas pipeline, and a stepped sealing plug is installed inside the sealing cap.

[0007] Furthermore, the combustion device is set according to the number of blast furnace tapholes, and the combustion device extends into the furnace body from the blast furnace tapholes.

[0008] Furthermore, the combustion air pipeline includes a combustion air blower, a main combustion air pipe, an air shut-off valve, a combustion air branch pipe, and a branch pipe regulating valve. The main combustion air pipe is connected to the combustion air blower, the combustion air pipe is connected to the combustion air branch pipe, and the combustion air branch pipe is connected to the end of the connecting pipe. An air shut-off valve is installed on the main combustion air pipe, and a branch pipe regulating valve is installed on the combustion air branch pipe.

[0009] Furthermore, the coke oven gas pipeline includes a main coke oven gas pipe, a branch coke oven gas pipe, a branch pipe shut-off valve, and a branch pipe regulating valve. The main coke oven gas pipe is connected to the branch coke oven gas pipe, and the branch coke oven gas pipe is connected to the end of the connecting pipe. A gas shut-off valve is installed on the main coke oven gas pipe, and a branch pipe regulating valve is installed on the branch coke oven gas pipe.

[0010] Furthermore, the small-diameter sealing end of the stepped sealing ring is a truncated cone shape that fits into the sealing connecting pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1) The burner device extends into the combustion furnace from the blast furnace taphole. Several holes at the front end of the burner are arranged in an alternating pattern, so that the flames are sprayed out for baking. The baking range is wide, the baking temperature is uniform, the blast furnace baking efficiency is high, and the heat preservation effect is excellent.

[0013] 2) The burner device has a simple structure, is quick to manufacture, can be made on-site, and is easy to install and remove. It can be installed as needed and removed immediately after the insulation is completed. It is convenient to use and easy to operate.

[0014] 3) No other large heating equipment is required to assist in heating and drying the oven, saving heating costs, energy consumption, and pollution emissions.

[0015] 4) The sealing cap is used to seal the connection pipe with the combustion air pipeline and coke oven gas pipeline, which has high sealing performance and strong sealing ability, prevents gas and air leakage, prevents combustion backfire, and improves the safety of the combustion device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the combustion device for rapid heat preservation of a blast furnace body according to the present invention.

[0017] Figure 2 This is a schematic diagram of the sealing cap structure described in this utility model.

[0018] Figure 3 This is a schematic diagram of the rapid heat preservation operation of the blast furnace body as described in this utility model.

[0019] Figure 4 This is a schematic diagram showing the connection between the connecting pipe described in this utility model and the combustion air pipeline and the coke oven gas pipeline.

[0020] Figure 5 This is the hole arrangement diagram described in this utility model.

[0021] Figure 6 The cross-section of the hole arrangement described in this utility model Figure 1 .

[0022] Figure 7 The cross-section of the hole arrangement described in this utility model Figure 2 .

[0023] In the diagram: 1. Burner; 2. Connecting pipe; 3. Combustion air pipeline; 4. Coke oven gas pipeline; 5. Sealing cap; 6. Stepped sealing plug; 7. Hole; 8. Main combustion air pipe; 9. Branch combustion air pipe; 10. Combustion fan; 11. Air shut-off valve; 12. Air regulating valve; 13. Main coke oven gas pipe; 14. Branch coke oven gas pipe; 15. Gas shut-off valve; 16. Gas regulating valve; 17. Blast furnace. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0025] In the description of this patent, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0026] For ease of description, spatial relative terms such as "above," "over," "on the upper surface," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly. Unless otherwise stated, the above terms have no special meaning and should not be construed as limiting the scope of protection of this utility model.

[0027] like Figure 1-7As shown, the working principle of a combustion device for rapid heat preservation of blast furnace body is as follows: Several combustion devices extend into the blast furnace 17 from different blast furnace tapholes, and spray flames through several holes 7 set at the front end of the burner 1, thereby efficiently and rapidly heating the blast furnace 17.

[0028] like Figure 1-7 As shown, a combustion device for rapid heat preservation of a blast furnace body includes a burner 1, a connecting pipe 2, a combustion air pipeline 3, a coke oven gas pipeline 4, and a sealing cap 5. The burner 1 is a slender cylindrical tube, which is convenient to manufacture and use. The burner is directly inserted into the blast furnace taphole to heat the blast furnace body. Several holes 7 are provided on the tube wall, which are arranged alternately to allow flames to shoot out and heat the blast furnace body. The heating range is wide and the heating is uniform. The end of the burner 1 is connected to the connecting pipe 2. The tail section has a branching structure, with each branch connecting to a combustion air pipeline 3 and a coke oven gas pipeline 4, respectively. The combustion air pipeline 3 and coke oven gas pipeline 4 are separately introduced into a connecting pipe 2 and then fused together before being ejected from the burner 1 to bake the furnace body. A sealing cap 5 is installed at the connection point between the connecting pipe 2 and the combustion air pipeline 3 and coke oven gas pipeline 4. A stepped sealing plug 6 is installed inside the sealing cap 5. The sealing cap 5 is threaded to the connecting pipe 2 and fully encloses the end of the branch of the connecting pipe 2. The stepped sealing plug 6 inside the sealing cap 5 seals the opening at the end of the branch of the connecting pipe 2 to prevent leakage. A connection hole for connecting the combustion air pipeline 3 and coke oven gas pipeline 4 is located at the center of the sealing cap 5 and the stepped sealing plug 6, through which the combustion air pipeline 3 and coke oven gas pipeline 4 are connected to the branch of the connecting pipe 2.

[0029] Furthermore, the combustion device is set according to the number of blast furnace tapholes. The combustion device extends into the furnace body from the blast furnace tapholes. The blast furnace tapholes are located in different positions of blast furnace 17. The combustion device is fed into the blast furnace body through the blast furnace tapholes to bake the blast furnace body, ensuring a wide baking range and uniform baking temperature.

[0030] Furthermore, the combustion air pipeline 3 includes a combustion air blower 10, a main combustion air pipe 8, an air shut-off valve 11, a combustion air branch pipe 9, and an air regulating valve 12. The main combustion air pipe 8 is connected to the combustion air blower 10, the main combustion air pipe 8 is connected to the combustion air branch pipe 9, and the combustion air branch pipe 9 is connected to the tail end of the connecting pipe 2. An air shut-off valve 11 is installed on the main combustion air pipe 8, and an air regulating valve 12 is installed on the combustion air branch pipe 9. Different numbers of combustion air branch pipes 9 are installed according to the number of blast furnace tapholes. The combustion air flow rate of the combustion air branch pipe 9 is adjusted by the air regulating valve 12.

[0031] Furthermore, the coke oven gas pipeline 4 includes a main coke oven gas pipe 13, a branch coke oven gas pipe 14, a gas shut-off valve 15, and a gas regulating valve 16. The main coke oven gas pipe 13 is connected to the branch coke oven gas pipe 14, and the branch coke oven gas pipe 14 is connected to the end of the connecting pipe 2. The main coke oven gas pipe 13 is equipped with a gas shut-off valve 15, and the branch coke oven gas pipe 14 is equipped with a gas regulating valve 16. The number of branch coke oven gas pipes 14 is set according to the number of different blast furnace tapholes. The coke oven gas flow rate of the branch coke oven gas pipe 14 is adjusted by the gas regulating valve 16.

[0032] Furthermore, the small-diameter sealing end of the stepped sealing plug 6 is a truncated cone that fits into the connecting pipe 2. The sealing plug at the truncated cone end is inserted into the connecting pipe 2 and then connected to the connecting pipe 2 by a threaded connection through the sealing cap 5. This compresses and deforms the internal stepped sealing plug 6, resulting in higher sealing strength, preventing gas and air leakage, and improving operational safety.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A combustion device for rapid heat preservation of a blast furnace body, comprising a burner, a connecting pipe, a combustion air pipeline, a coke oven gas pipeline, and a sealing cover, characterized in that, The burner is a slender cylindrical tube with several holes arranged alternately on its wall. A connecting tube is provided at the end of the burner, and the tail of the connecting tube has a branched structure. The end of each branch is connected to the combustion air pipeline and the coke oven gas pipeline, respectively. A sealing cap is provided at the connection point between the connecting tube and the combustion air pipeline and the coke oven gas pipeline, and a stepped sealing plug is provided inside the sealing cap.

2. The combustion device for rapid heat preservation of blast furnace body according to claim 1, characterized in that, The combustion device is set according to the number of blast furnace tapholes, and the combustion device extends into the furnace body from the blast furnace tapholes.

3. The combustion device for rapid heat preservation of blast furnace body according to claim 1, characterized in that, The combustion air pipeline includes a combustion air blower, a main combustion air pipe, an air shut-off valve, a combustion air branch pipe, and a branch pipe regulating valve. The main combustion air pipe is connected to the combustion air blower, the combustion air pipe is connected to the combustion air branch pipe, and the combustion air branch pipe is connected to the end of the connecting pipe. An air shut-off valve is installed on the main combustion air pipe, and a branch pipe regulating valve is installed on the combustion air branch pipe.

4. The combustion device for rapid heat preservation of blast furnace body according to claim 1, characterized in that, The coke oven gas pipeline includes a main coke oven gas pipe, a branch coke oven gas pipe, a branch pipe shut-off valve, and a branch pipe regulating valve. The main coke oven gas pipe is connected to the branch coke oven gas pipe, and the branch coke oven gas pipe is connected to the end of the connecting pipe. A gas shut-off valve is installed on the main coke oven gas pipe, and a branch pipe regulating valve is installed on the branch coke oven gas pipe.

5. A combustion device for rapid heat preservation of a blast furnace body according to claim 1, characterized in that, The small-diameter sealing end of the stepped sealing ring is a truncated cone shape that fits into the sealing connecting pipe.

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