Conical distributing device for sinter sensible heat vertical recovery process

Abstract

The invention discloses a conical distributing device for a sinter sensible heat vertical recovery process. The conical distributing device comprises a vertical distributing pipe, a conical distributing pipe, a modifying body and a supporting beam. The upper end of the vertical distribution pipe is communicated with the sinter surge bin, and the lower end of the vertical distribution pipe is communicated with the upper end of the conical distribution pipe; the edge of the lower end of the conical material distribution pipe is positioned above the top surface of the material layer; the flow changing body is arranged at the central position of the top surface of the supporting beam and is positioned in the conical material distribution pipe; the supporting beam is located below the edge of the lower end of the conical material distribution pipe. The distributing pipe solves the problem that gas-solid heat exchange in a furnace is insufficient due to the fact that an existing distributing pipe cannot adjust particle size distribution segregation of sintered ore in the furnace.

Description

Technical Field

[0001] This invention relates to waste heat recovery process equipment technology in the metallurgical industry, and more specifically, to a conical feeder for a vertical sensible heat recovery process of sintered ore. Background Technology

[0002] Currently, hot sinter is mainly cooled using annular coolers, which suffers from drawbacks such as high air leakage, large amounts of dust, low cooling efficiency, and a high failure rate. In light of this, and referencing the dry quenching process, a vertical sensible heat recovery process for sinter has emerged. The significant characteristic of this process is that the heat exchange between the hot sinter and the cold air occurs entirely within a sealed vertical cooling furnace cavity. The sinter is fed into the furnace from the top and fills the cavity, exchanging heat with the cooling gas introduced from the bottom, thus achieving cooling of the sinter. This process avoids air leakage and fugitive dust emissions, and its high heat recovery efficiency has attracted widespread attention in the industry.

[0003] In the vertical heat recovery process for sintered ore, the finished sintered ore is fed into the vertical cooling furnace after being crushed by a single roller. The high temperature (600℃~700℃) of the material entering the furnace makes it difficult to use a movable feeding device; only a fixed feeding pipe can be used. Furthermore, the wide particle size distribution of the sintered ore entering the furnace, with a high proportion of small particles, easily leads to particle size segregation within the furnace. That is, large particles are concentrated on the furnace walls, while small particles are concentrated in the center. This material segregation results in uneven permeability of the material layer, causing the cooling gas to escape from the walls and become unusable for cooling the sintered ore, thus severely affecting the heat exchange efficiency of the vertical cooling furnace.

[0004] Therefore, in order to overcome the shortcomings of existing technologies and improve the distribution and segregation of high-temperature sinter in vertical cooling furnaces, it is necessary to develop new types of material distribution devices to make the particle size distribution of sinter in vertical cooling furnaces as uniform as possible, thereby improving gas-solid heat exchange in the furnace. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a conical feeder for a vertical sensible heat recovery process of sinter, solving the problem that existing feeder tubes cannot adjust the particle size distribution segregation of sinter in the furnace, resulting in insufficient gas-solid heat exchange in the furnace.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A conical feeder for a vertical recovery process of sensible heat in sintered ore includes a vertical feed pipe, a conical feed pipe, a fluid modifier, and a support beam.

[0008] The upper end of the vertical feeding pipe is connected to the sinter buffer bin, and the lower end is connected to the upper end of the conical feeding pipe.

[0009] The lower edge of the tapered material distribution tube is located above the top surface of the material layer;

[0010] The modified fluid is located at the center of the top surface of the support beam and inside the tapered fabric distribution tube;

[0011] The support beam is located below the lower edge of the tapered fabric tube.

[0012] Preferably, the vertical fabric tube is cylindrical.

[0013] Preferably, the tapered fabric tube is configured as a frustum shape, with its smaller end connected to the lower end of the vertical fabric tube, and the edge of its larger end placed on the top surface of the support beam.

[0014] Preferably, the angle α between the wall of the conical feeding tube and the horizontal plane is greater than the angle of repose of the sinter.

[0015] Preferably, the included angle α is between 60° and 75°.

[0016] Preferably, the modified fluid is configured as a frustum, with its larger end located on the top surface of the support beam.

[0017] Preferably, the outer surface of the modified fluid is provided with multiple baffle rings.

[0018] Preferably, the top surface of the support beam is set as a semi-circle.

[0019] Preferably, the support beam is configured as a cross beam or a star beam.

[0020] Preferably, the tapered fabric tube has multiple circular or square through holes on its wall surface.

[0021] Preferably, the diameter of the circular through hole is less than 10 mm;

[0022] The side length of the square through hole is less than 10mm.

[0023] The conical feeder for vertical recovery of sensible heat in sintered ore provided by this invention has the following advantages:

[0024] 1) The conical feeding tube ensures that the material is always constrained by the wall during the downward movement, preventing large particles from rolling outwards and forming a mountain-shaped pile after leaving the feeding tube, thereby improving the segregation distribution of the material.

[0025] 2) The modified fluid installation provides some support for the material inside the conical distribution tube, thereby reducing the compression of the material below it by the material inside the conical distribution tube. In addition, an inverted triangular free space is formed below the cross beam, which is beneficial to improving the air permeability of the material layer below the conical distribution tube. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the conical fabric feeder of the present invention;

[0027] Figure 2 This is a schematic diagram of the included angle α in the conical fabric feeder of the present invention;

[0028] Figure 3 This is a three-dimensional schematic diagram of the cross beam supporting the tapered fabric feeder of the present invention;

[0029] Figure 4 This is a three-dimensional schematic diagram of the support beam in the conical fabric feeder of the present invention, which is a cross beam;

[0030] Figure 5 This is a schematic diagram showing that a circular through hole is opened on the wall surface of the conical feeding tube in the conical feeding device of the present invention. Detailed Implementation

[0031] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Combination Figures 1 to 5 As shown, the present invention provides a conical feeder for a vertical heat recovery process of sintered ore, comprising a vertical feed pipe 1, a conical feed pipe 2, a fluid converter 3, and a support beam.

[0033] The vertical feeding pipe 1 is cylindrical, and its upper end is connected to the sinter buffer bin.

[0034] The conical feeding pipe 2 is configured as a frustum, with its upper end connected to the lower end of the vertical feeding pipe 1. The lower edge of the conical feeding pipe 2 is located above the top surface of the material layer and is used to discharge sintered ore.

[0035] The distance between the large and small ends of the tapered material distribution pipe 2 can be adjusted according to the furnace cavity and the height of the material layer.

[0036] The included angle α between the wall of the conical feeding pipe 2 and the horizontal plane is greater than the angle of repose of the sinter, and the included angle α is preferably between 60° and 75°.

[0037] The modified fluid 3 is fixed at the center of the top surface of the support beam and is located inside the tapered cloth tube 2.

[0038] The modified fluid 3 is shaped like a frustum, with its smaller end at the top and its larger end at the center of the top surface of the supporting beam. Multiple baffle rings 4 are welded to the outside of the modified fluid 3. The function of the baffle rings 4 is to allow some material to accumulate on the baffle rings 4, forming a "material-to-material" structure to prevent the sintered ore from causing severe wear on the modified fluid 3.

[0039] The support beam provides support for the modified fluid 3.

[0040] The top surface of the support beam is designed to be semi-circular to reduce the impact on the material flow above it.

[0041] The support beam can be set as a cross beam 5 or a star beam 6.

[0042] Multiple circular or square through holes 7 are opened in a certain order on the wall surface of the tapered fabric tube 2. Among them, the diameter of the circular through holes 7 is less than 10 mm, and the side length of the square through holes 7 is less than 10 mm.

[0043] Example 1

[0044] Combination Figure 1 As shown, this embodiment 1 provides a conical feeder for a vertical heat recovery process of sintered ore, including a vertical feed pipe 1, a conical feed pipe 2, a fluid converter 3, and a cross beam 5.

[0045] The vertical fabric tube 1 is connected to the tapered fabric tube 2.

[0046] The height of the tapered cloth tube 2 is 3m, and the angle between the wall surface and the horizontal plane is 70°.

[0047] The modified fluid 3 is placed inside the conical cloth tube 2.

[0048] The center of the bottom surface of the modified fluid 3 coincides with the center of the bottom surface of the conical cloth tube 2.

[0049] Multiple baffle rings 4 are welded onto the wall of the modified fluid 3 to form a grinding structure.

[0050] The cross beam 5 is located below the modified fluid 3, and the two are fixed together by welding.

[0051] Example 2

[0052] Combination Figure 5 As shown, this embodiment 2 provides a conical feeder for a vertical recovery process of sensible heat in sintered ore based on embodiment 1. A through hole 7 with a diameter of 10mm is opened on the wall of the conical feeder tube 2, and a cross beam 6 is used to support the fluid 3 below.

[0053] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the essential spirit of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A conical feeder for a vertical heat recovery process of sintered ore, characterized in that: Includes vertical placing boom, tapered placing boom, fluid remodeling system, and support beam; The upper end of the vertical feeding pipe is connected to the sinter buffer bin, and the lower end is connected to the upper end of the conical feeding pipe. The lower edge of the tapered material distribution tube is located above the top surface of the material layer; The modified fluid is located at the center of the top surface of the support beam and inside the tapered fabric distribution tube; The support beam is located below the lower edge of the tapered fabric tube.

2. The conical feeder for the vertical heat recovery process of sintered ore according to claim 1, characterized in that: The vertical fabric tube is cylindrical.

3. The conical feeder for the vertical heat recovery process of sintered ore according to claim 1, characterized in that: The tapered fabric tube is configured as a frustum, with its smaller end connected to the lower end of the vertical fabric tube, and the edge of its larger end placed on the top surface of the support beam.

4. The conical feeder for the vertical heat recovery process of sintered ore according to claim 3, characterized in that: The angle α between the wall of the conical feeding pipe and the horizontal plane is greater than the angle of repose of the sinter.

5. The conical feeder for the vertical heat recovery process of sintered ore according to claim 4, characterized in that: The included angle α is between 60° and 75°.

6. The conical feeder for the vertical heat recovery process of sintered ore according to claim 1, characterized in that: The modified fluid is configured as a frustum, with its larger end located on the top surface of the support beam.

7. The conical feeder for the vertical recovery process of sensible heat in sintered ore according to claim 6, characterized in that: The modified fluid has multiple baffle rings on its outer surface.

8. The conical feeder for the vertical heat recovery process of sintered ore according to claim 1, characterized in that: The top surface of the support beam is designed to be semi-circular.

9. The conical feeder for the vertical heat recovery process of sintered ore according to claim 8, characterized in that: The support beam is configured as a cross beam or a star beam.

10. The conical feeder for the vertical recovery process of sensible heat in sintered ore according to claim 1, characterized in that: The tapered fabric tube has multiple circular or square through holes on its wall surface.

11. The conical feeder for the vertical recovery process of sensible heat in sintered ore according to claim 10, characterized in that: The diameter of the circular through hole is less than 10mm; The side length of the square through hole is less than 10mm.

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