BF burden distributor

Abstract

The present invention discloses a blast furnace burden distributor, which comprises a housing. A rotary charging barrel is installed on the upper part of the housing, and the bottom of the rotary charging barrel is communicated with a chute. A plurality of first air outlets are annularly arranged on the side wall of the housing, and the first air outlets are connected to first conveying pipes. A top plate is fixed to the top of the housing. An exhaust rack is installed in the rotary charging barrel, and the first conveying pipe and the exhaust rack are connected through a universal joint. A plurality of second air outlets are annularly arranged on the side wall of the housing, and the second air outlets are connected to the inside of the blast furnace through second conveying pipes. An air pump is installed on the second conveying pipes. The second air outlets are located above the first air outlets, and the first air outlets and the second air outlets are arranged in a staggered manner along the radial direction of the housing. An annular partition is arranged between the first air outlets and the second air outlets. The blast furnace burden distributor of the present invention can reduce the disturbance and turbulence of the gas flow, thereby reducing the interference of the feeding on the furnace condition.

Description

Technical Field

[0001] The present invention belongs to the technical field of blast furnace auxiliary equipment, and more particularly relates to a blast furnace burden distributor. Background Art

[0002] A blast furnace burden distributor is a device used to feed materials into a blast furnace. In order to ensure the accuracy and uniformity of feeding, the blast furnace burden distributor uses a rotating and swinging method for feeding. However, this feeding method easily disturbs the temperature and gas flow in the blast furnace, resulting in fluctuations in the furnace conditions. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a blast furnace burden distributor to solve the deficiencies of the prior art and reduce the interference of feeding on the furnace conditions.

[0004] To solve the above technical problem, the present invention provides a blast furnace burden distributor, including a housing. A rotating drum is installed on the upper part of the housing. The bottom of the rotating drum is communicated with a chute. A plurality of first air outlets are arranged in a circular pattern on the side wall of the housing. The first air outlets are connected to first conveying pipes. A top plate is fixed to the top of the housing. An exhaust rack is installed in the rotating drum. The first conveying pipes and the exhaust rack are connected through universal joints. A plurality of second air outlets are arranged in a circular pattern on the side wall of the housing. The second air outlets are connected to the inside of the blast furnace through second conveying pipes. An air pump is installed on the second conveying pipes. The second air outlets are located above the first air outlets, and the first air outlets and the second air outlets are arranged in a staggered manner along the radial direction of the housing. An annular partition is arranged between the first air outlets and the second air outlets.

[0005] Preferably, in the above blast furnace burden distributor, the exhaust rack includes a plurality of layers of rack bodies. A plurality of flow guiding plates are arranged on the rack bodies. Vent holes are arranged on the flow guiding plates. The bottom of the vent holes is inserted with a gas conveying pipe. The other end of the gas conveying pipe is connected to the universal joint.

[0006] Preferably, in the above blast furnace burden distributor, a flow guiding groove connected to the vent holes is arranged on the surface of the flow guiding plate.

[0007] Preferably, in the above blast furnace burden distributor, the flow guiding plate includes a first stepped portion and a second stepped portion. The first stepped portion is located above the second stepped portion. The vent holes and the flow guiding grooves are arranged on the first stepped portion.

[0008] Preferably, in the above blast furnace burden distributor, the end of the first air outlet is an inclined surface, and an extension portion extending into the housing is arranged at the top of the first air outlet.

[0009] The beneficial effects of the blast furnace burden distributor of the present invention are as follows: During the process of feeding raw materials into the blast furnace using the blast furnace burden distributor of the present invention, the high-temperature gas overflowing during the feeding process is used to preheat the raw materials to be fed, thereby reducing the temperature fluctuation generated after feeding. At the same time, an air pump is used to optimize the flow circulation of the gas in the furnace and the distributor, reducing the disturbance and turbulence of the gas flow, thereby reducing the interference of the feeding on the furnace conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 is a schematic structural diagram of the blast furnace burden distributor of the present invention.

[0012] Figure 2 is a schematic structural diagram of the exhaust rack in the blast furnace burden distributor of the present invention.

[0013] Figure 3 is a schematic diagram of the relative positions of the first air outlet and the second air outlet in the blast furnace burden distributor of the present invention.

[0014] Description of the reference numerals:

[0015] 1, outer shell; 2, rotating drum; 3, chute; 4, first air outlet; 5, first delivery pipe; 6, exhaust rack; 7, universal joint; 8, top plate; 9, second air outlet; 10, second delivery pipe; 11, air pump; 12, annular partition; 13, frame; 14, deflector; 15, ventilation hole; 16, gas delivery pipe; 17, diversion groove; 18, first step portion; 19, second step portion; 20, extension portion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in combination with specific embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0017] Such as Figure 1 、 Figure 2 and Figure 3As shown, the blast furnace distributor of the present invention includes an outer shell 1, a rotating barrel 2 is installed on the upper part of the outer shell 1, the bottom of the rotating barrel 2 is connected to the chute 3, a plurality of first air outlets 4 are arranged in an annular manner on the side wall of the outer shell 1, the first air outlet 4 is connected to the first conveying pipe 5, a top plate 8 is fixed on the top of the outer shell 1, an exhaust rack 6 is installed in the rotating barrel 2, the first conveying pipe 5 is connected to the exhaust rack 6 through a universal joint 7, a plurality of second air outlets 9 are arranged in an annular manner on the side wall of the outer shell 1, the second air outlet 9 is connected to the inside of the blast furnace through a second conveying pipe 10, an air pump 11 is installed on the second conveying pipe 10, the second air outlet 9 is located above the first air outlet 4, and the first air outlet 4 and the second air outlet 9 are staggered along the radial direction of the outer shell 1, an annular partition 12 is provided between the first air outlet 4 and the second air outlet 9, the end of the first air outlet 4 is a slope, and the top of the first air outlet 4 is provided with an extension 20 extending into the outer shell 1.

[0018] The exhaust rack 6 comprises a plurality of frame layers 13, each of which is provided with a plurality of guide plates 14. Each guide plate 14 is provided with vents 15. A gas pipe 16 is inserted into the bottom of each vent 15, and the other end of each gas pipe 16 is connected to the universal joint 7. A guide groove 17 is provided on the surface of each guide plate 14, connected to each vent 15. The guide plate 14 includes a first step 18 and a second step 19. The first step 18 is located above the second step 19, and the vents 15 and guide groove 17 are located on the first step 18.

[0019] In the process of using the blast furnace distributor of the present invention to feed the blast furnace, the coal gas flow flows upward from the furnace, and part of the coal gas enters the exhaust frame 6 through the first gas outlet 4 and the first conveying pipe 5, and is discharged upward through various air vents 15 in the exhaust frame 6, thereby realizing preheating of the raw materials in the rotating barrel 2. Therefore, the blast furnace distributor of the present invention uses the high-temperature coal gas overflowing during the feeding process to preheat the raw materials to be fed, thereby reducing the temperature fluctuations generated after the feeding; moreover, the coal gas flowing out of the rotating barrel 2 and other coal gas flowing directly out of the furnace are forcibly sucked out by the air pump 11 at the second gas outlet 9, and returned to the inside of the blast furnace through the second conveying pipe 10. The entire coal gas flow can form a stable and uniform flow state in the blast furnace and the distributor. Therefore, the blast furnace distributor of the present invention uses the air pump to optimize the flow circulation of the coal gas in the furnace and the distributor, reduces the disturbance turbulence of the coal gas flow, and thus reduces the interference of feeding on the working conditions in the furnace.

[0020] In addition, in the blast furnace burden distributor of the present invention, by arranging the first air outlet 4 and the second air outlet 9 staggeredly along the radial direction of the outer shell 1 and adding an annular partition plate 12 between the first air outlet 4 and the second air outlet 9, the mutual interference between the first air outlet 4 and the second air outlet 9 can be reduced. The inclined surface shape of the first air outlet 4 can facilitate the gas to enter the first air outlet 4. The material will be continuously agitated under the drive of the rotating drum 2. In this process, through the diversion of the diversion plate 14, the turnover efficiency of the material can be improved, and the uniformity of the material's heat absorption can be enhanced. Through the special design of the shape of the diversion plate 14, the longitudinal vibration amplitude of the material is strengthened by using the stepped structure of the diversion plate 14, so as to further improve the ventilation efficiency of the gas in cooperation with the ventilation holes 15 and the diversion grooves 17.

[0021] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. At the same time, the term "connection" and the like used in this article should be understood in a broad sense, which can be a fixed connection, a detachable connection, a direct connection, or an indirect connection through an intermediate component. In addition, "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. in this article are all referenced to the placement state shown in the drawings.

[0022] It should also be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the present invention.

Claims

1. A blast furnace burden distributor, comprising a housing, wherein a rotary charging barrel is installed on the upper part of the housing, and the bottom of the rotary charging barrel is communicated with a chute, characterized in that, A plurality of first air outlets are arranged annularly on the side wall of the outer shell. The first air outlets are connected to the first conveying pipes. A top plate is fixed to the top of the outer shell. An exhaust rack is installed in the rotary drum. The first conveying pipes and the exhaust rack are connected by universal joints. A plurality of second air outlets are arranged annularly on the side wall of the outer shell. The second air outlets are connected to the inside of the blast furnace through second conveying pipes. An air pump is installed on the second conveying pipes. The second air outlets are located above the first air outlets, and the first air outlets and the second air outlets are arranged staggeredly along the radial direction of the outer shell. An annular partition is arranged between the first air outlets and the second air outlets; The exhaust rack includes a plurality of layers of rack bodies. A plurality of flow guide plates are arranged on the rack bodies. Vent holes are arranged on the flow guide plates. The bottom of the vent holes is inserted with air conveying pipes. The other ends of the air conveying pipes are connected to the universal joints; The end of the first air outlet is a slope, and an extension part extending into the outer shell is arranged at the top of the first air outlet.

2. The blast furnace burden distributor according to claim 1, characterized in that, Flow guide grooves connected to the vent holes are arranged on the surface of the flow guide plates.

3. The burden distributor for blast furnace according to claim 2, characterized in that, The flow guide plates include a first step part and a second step part. The first step part is located above the second step part. The vent holes and the flow guide grooves are arranged on the first step part.

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