A coke dry quenching furnace

Abstract

The present invention provides a coke dry quenching furnace, which includes a pre-storage section, a transition section, and a cooling section sequentially arranged in the height direction. The transition section includes an outer surrounding wall and an inner surrounding wall. The inner surrounding wall surrounds the cavity of the transition section, and the outer surrounding wall surrounds the inner surrounding wall. An annular air duct is formed between the inner surrounding wall and the outer surrounding wall. A first support wall and a plurality of vertical partition walls are arranged in the annular air duct. An air outlet is arranged on the outer surrounding wall. The first support wall divides the annular air duct into a first air duct and a second air duct. At least one vertical partition wall is arranged in both the first air duct and the second air duct to divide the first air duct and the second air duct into a plurality of first sub-air ducts and a plurality of second sub-air ducts. In the present invention, the vertical partition walls can make the air flow velocity at each position in the annular air duct even, make the stress distribution on the inner surrounding wall more uniform, and reduce phenomena such as bulging, brick dropping, and collapse.

Description

Technical Field

[0001] The invention relates to the field of smelting equipment, and in particular to a dry quenching furnace. Background Art

[0002] The dry coke quenching process is a coke quenching process that uses inert gas to cool down red coke (coke that has not yet cooled and appears red). Figure 1 As shown, the dry quenching furnace used to implement the dry quenching process generally includes a pre-storage section, a transition section and a cooling section arranged in sequence from top to bottom. The transition section includes an outer surrounding wall 10 and an inner surrounding wall 20. An annular air duct is formed between the inner surrounding wall 20 and the outer surrounding wall. The red coke flows downward from the pre-storage section into the transition section and the cooling section in sequence. When the dry quenching process is carried out, the gas exchanges heat with the coke in the cooling section. The hot gas after the heat exchange rises from the cooling section into the annular air duct and is exported through the annular air duct to the gas processing equipment for heat recovery and other processes.

[0003] Among them, the inner surrounding wall 20 often bulges, loses bricks, collapses, etc., which seriously affects the service life of the dry quenching furnace body. Summary of the invention

[0004] The invention aims to provide a dry quenching furnace which is not prone to bulging, brick falling and collapse and has a long furnace body life.

[0005] To achieve the above-mentioned object, the present invention provides a dry quenching furnace, the dry quenching furnace comprises a pre-storage section, a transition section and a cooling section arranged in sequence along the height direction, the cavities of the pre-storage section, the transition section and the cooling section are connected, the transition section comprises an outer surrounding wall and an inner surrounding wall, the inner surrounding wall is arranged around the cavity of the transition section, the outer surrounding wall is arranged around the inner surrounding wall, and an annular air duct is formed between the inner surrounding wall and the outer surrounding wall, the annular air duct is connected to the cooling section, a first supporting wall and a plurality of vertical partition walls are arranged in the annular air duct, an air outlet is arranged on the outer surrounding wall, one side of the first supporting wall is connected to the inner surrounding wall, the other side of the first supporting wall is connected to the outer surrounding wall, the first supporting wall and the air outlet divide the annular air duct into a first air duct and a second air duct isolated from each other;

[0006] One side of the vertical partition wall is connected to the inner surrounding wall, and the other side of the vertical partition wall is connected to the outer surrounding wall. At least one vertical partition wall is arranged in the first air duct to divide the first air duct into a plurality of first sub-air ducts. At least one vertical partition wall is arranged in the second air duct to divide the second air duct into a plurality of second sub-air ducts. Both the first sub-air duct and the second sub-air duct can connect the annular air duct with the cavity of the cooling section.

[0007] Preferably, among the multiple vertical partition walls, the height of the vertical partition wall with a large circumferential distance from the air outlet is higher than that of the vertical partition wall with a small circumferential distance from the air outlet.

[0008] Preferably, the dry quenching furnace further includes a horizontal partition wall, one side of the horizontal partition wall is connected to the inner surrounding wall, the other side of the horizontal partition wall is connected to the outer surrounding wall, one end of the horizontal partition wall is connected to one end of a vertical partition wall facing the pre-storage section, and the other end of the horizontal partition wall extends towards the air outlet.

[0009] Preferably, the first support wall is disposed opposite to the air outlet.

[0010] Optionally, the cooling section includes a cooling section furnace wall and a flow equalizing wall disposed at the top end of the cooling section furnace wall. The flow equalizing wall is disposed around the top end of the cooling section furnace wall. One end of the flow equalizing wall is connected to the outer surrounding wall, and the other end of the flow equalizing wall is connected to the inner surrounding wall to connect the transition section to the top end of the cooling section furnace wall. A plurality of air outlet holes are provided on the flow equalizing wall, and the air outlet holes communicate the space between the vertical partition walls in the annular air duct with the cavity of the cooling section.

[0011] Preferably, in the annular air duct, each first sub-air duct corresponds to one air outlet hole, and each second sub-air duct corresponds to one air outlet hole.

[0012] Preferably, there is an angle less than 90° between the flow equalizing wall and the axis of the dry quenching furnace.

[0013] Preferably, a second support wall is further disposed in the annular air duct. The second support wall is disposed corresponding to the air outlet, and the second support wall is connected to the inner surrounding wall.

[0014] Optionally, in the direction from the pre-storage section to the cooling section, the width of the second support wall gradually increases.

[0015] Preferably, the vertical partition wall extends radially along the cavity of the transition section.

[0016] In the dry quenching furnace provided by the present invention, a plurality of vertical partition walls are provided between the inner surrounding wall and the outer surrounding wall, so that the space communicating the annular air duct with the cavity of the cooling section can be divided into a plurality of sub-air ducts, so that when the gas at each position enters the annular air duct of the transition section from the cooling section, the wind speeds of the hot gases flowing through each sub-air duct are equal, thereby reducing the wind speed difference between different positions in the entire annular air duct, making the stress distribution on the inner surrounding wall more uniform, and thus avoiding problems such as bulging, brick dropping, and collapse. Description of the Drawings

[0017] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the following detailed description, they are used to explain the present invention, but do not limit the present invention. In the accompanying drawings:

[0018] Figure 1 is a schematic structural diagram of a dry quenching furnace in the prior art;

[0019] Figure 2 is a sectional view of the dry quenching furnace provided by the present invention;

[0020] Figure 3 is a schematic structural diagram of an embodiment of the dry quenching furnace provided by the present invention;

[0021] Figure 4 is Figure 3 a sectional view of the dry quenching furnace in;

[0022] Figure 5 is a schematic structural diagram of another embodiment of the dry quenching furnace provided by the present invention;

[0023] Figure 6 is Figure 5 a sectional view of the dry quenching furnace in;

[0024] Figure 7 is a sectional view of another embodiment of the dry quenching furnace provided by the present invention.

[0025] Explanation of reference numerals

[0026] 10: Outer surrounding wall 20: Inner surrounding wall

[0027] 30: Annular air duct 31: First support wall

[0028] 32: Second support wall 33: Vertical partition wall

[0029] 34: Air outlet 35: Horizontal partition wall

[0030] 40: Cooling section furnace wall 50: Flow equalizing wall

[0031] 51: Air outlet hole Detailed description

[0032] The following is a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and understanding the present invention, and do not limit the present invention.

[0033] After a large number of experiments and studies, the inventors of the present invention found that the specific reasons for the bulging, brick dropping, and collapse of the coke dry quenching furnace are as follows: During the process of the gas used to cool the coke entering the annular air duct and being discharged through the annular air duct, the difference in gas flow velocity at different positions is too large, resulting in uneven air pressure in the annular air duct, causing excessive local stress on the inner surrounding wall 20, and ultimately leading to problems such as deformation, brick dropping, and collapse of the inner surrounding wall 20.

[0034] To solve the above technical problems, the present invention provides a coke dry quenching furnace, as Figures 2 to 7 shown. The coke dry quenching furnace includes a pre-storage section D1, a transition section D2, and a cooling section D3 arranged in sequence along the height direction. The cavities of the pre-storage section D1, the transition section D2, and the cooling section D3 are communicated. The transition section D2 includes an outer surrounding wall 10 and an inner surrounding wall 20. The inner surrounding wall 20 surrounds the cavity of the transition section D2. The outer surrounding wall 10 surrounds the inner surrounding wall 20, and an annular air duct 30 is formed between the inner surrounding wall 20 and the outer surrounding wall 10. The annular air duct 30 is communicated with the cooling section D3. A first support wall 31 and a plurality of vertical partition walls 33 are arranged in the annular air duct. An air outlet 34 is arranged on the outer surrounding wall 10. One side of the first support wall 31 is connected to the inner surrounding wall 20, and the other side of the first support wall 31 is connected to the outer surrounding wall 10. The first support wall 31 and the air outlet 34 divide the annular air duct into a first air duct and a second air duct that are isolated from each other.

[0035] One side of the vertical partition wall 33 is connected to the inner surrounding wall 20, and the other side of the vertical partition wall 33 is connected to the outer surrounding wall 10. At least one vertical partition wall 33 is arranged in the first air duct to divide the first air duct into a plurality of first sub-air ducts. At least one vertical partition wall 33 is arranged in the second air duct to divide the second air duct into a plurality of second sub-air ducts. The first sub-air ducts and the second sub-air ducts can both communicate the annular air duct 30 with the cavity of the cooling section D2.

[0036] It should be noted that when the gas at each position enters the annular air duct 30 of the transition section D2 from the cooling section D3, it first enters the sub-air ducts between the vertical partition walls 33, then converges through the ventilation gaps reserved above the vertical partition walls 33, and flows along the layout direction of the annular air duct 30 and is discharged from the annular air duct 30.

[0037] In the present invention, a plurality of vertical partition walls 33 are further arranged between the inner surrounding wall 20 and the outer surrounding wall 10, so as to be able to divide the space where the annular air duct 30 communicates with the cavity of the cooling section D3 into a plurality of sub-air ducts, so that when the gas at each position enters the annular air duct 30 of the transition section D2 from the cooling section D3, the wind speeds of the hot gases flowing through each sub-air duct are equal, thereby reducing the wind speed difference between different positions in the entire annular air duct 30, making the stress distribution on the inner surrounding wall 20 more uniform, and thus avoiding problems such as bulging, brick dropping, and collapse.

[0038] It should be noted that in the present invention, the first support wall 31 and the air outlet 34 divide the annular air duct into a first air duct and a second air duct that are isolated from each other, which means that the first support wall 31 completely radially partitions the annular air duct 30. As a result, when gas enters the annular air duct 30 of the transition section D2 from the cooling section D3, the gas entering the sub-air ducts on both sides of the first support wall 31 flows to the air outlet 34 on both sides of the first support wall 31, and the gas is led out from the air outlet 34 to a gas treatment device for processes such as heat recovery.

[0039] To make the stress distribution on the outer surrounding wall 10 and the inner surrounding wall 20 more uniform, preferably, as Figures 5 to 7 shown, the first support wall 31 is disposed opposite to the air outlet 34.

[0040] In Figures 2 to 7 , 0° represents the direction where the first support wall 31 is located, and 180° represents the direction where the air outlet 34 is located. The first support wall 31 is disposed opposite to the air outlet 34, so that the lengths of the first air duct and the second air duct are basically the same, balancing the air pressure difference between the two air ducts and making the stress distribution on the outer surrounding wall 10 and the inner surrounding wall 20 more uniform.

[0041] To improve the strength of the inner surrounding wall 20, preferably, as Figure 2 shown, a second support wall 32 is further provided in the annular air duct 30. The second support wall 32 is disposed corresponding to the air outlet 34 and is connected to the inner surrounding wall 20. In the present invention, the relatively disposed first support wall 31 and second support wall 32 support the inner surrounding wall 20 from opposite side surfaces respectively, thereby improving the strength of the inner surrounding wall 20 and preventing the inner surrounding wall 20 from deforming.

[0042] The present invention does not specifically limit the shape of the second support wall 32. For example, as Figure 2 shown, optionally, in the direction from the pre-storage section D1 to the cooling section D3, the width of the second support wall 32 gradually increases.

[0043] The present invention does not specifically limit the extending direction of the vertical partition wall 33. For example, optionally, the vertical partition wall 33 extends along the radial direction of the cavity of the transition section D2.

[0044] To further balance the stress at each position on the outer surrounding wall 10 and the inner surrounding wall 20, preferably, as Figures 3 to 7 shown, among the multiple vertical partition walls 33, the height of the vertical partition wall 33 with a greater circumferential distance from the air outlet 34 is higher than the height of the vertical partition wall 33 with a smaller circumferential distance from the air outlet 34.

[0045] As Figure 5As shown, after the hot air enters the annular air duct 30, it first flows through the sub-air ducts separated by the vertical partition walls 33, and then flows horizontally around the inner cavity of the dry quenching furnace to the air outlet 34 located at the 0° direction. In the present invention, the height of the vertical partition walls 33 that are far from the air outlet 34 in the circumferential direction is set higher than the height of the vertical partition walls 33 that are close to the air outlet 34 in the circumferential direction, so that not only the uniformity of the wind speed in the sub-air ducts separated by the vertical partition walls 33 can be maintained, but also the wind speed (V1 to V7) of the hot air flowing horizontally from the outlet of each sub-air duct to the air outlet 34 can be more evenly distributed in the vertical direction, thereby further improving the uniformity of the air flow in the vertical partition walls 33 and balancing the stress at various positions on the outer surrounding wall 10 and the inner surrounding wall 20.

[0046] In order to ensure the supporting capacity of the first supporting wall 31 without affecting the air outlet function of the air outlet 34, preferably, the width of the first supporting wall 31 gradually increases from the part facing the pre-storage section D1 to the part facing the cooling section D3.

[0047] In order to increase the stability of the dry quenching furnace body structure and improve the uniformity of hot air distribution in the annular air duct 30, preferably, the second support wall 32 is connected to the inner surrounding wall 20 on the side facing the inner cavity of the dry quenching furnace, and the second support wall 32 is connected to the outer surrounding wall 10 on the side away from the inner cavity of the dry quenching furnace, dividing the annular air duct 30 into two parts. In the present invention, the second support wall 32 is set to directly close the cross section of the annular air duct 30 in the 180° direction, dividing the annular air duct 30 into two parts, so that the hot air flowing out of each sub-air duct between the vertical partition walls 33 flows to the air outlet 34 through two paths, namely, the first air duct (180°→90°→0°) and the second air duct (180°→270°→0°), thereby improving the uniformity of hot air distribution in the annular air duct 30.

[0048] In order to further balance the stress at various positions on the outer surrounding wall 10 and the inner surrounding wall 20, preferably, as Figure 4 , Figure 6 and Figure 7 As shown, the dry quenching furnace also includes a horizontal partition wall 35, one side of the horizontal partition wall 35 is connected to the inner surrounding wall 20, the other side of the horizontal partition wall 35 is connected to the outer surrounding wall 10, one end of the horizontal partition wall 35 is connected to one end of a vertical partition wall 33 toward the pre-storage section D1, and the other end of the horizontal partition wall 35 extends in the direction of the air outlet 34.

[0049] In the present invention, the inventors consider the hot air ( Figure 6 V1 to V4 or Figure 7 The route of V1 to V6 in the figure is too long, which may cause uneven wind speed distribution at different heights, or cause thermal airflow ( Figure 6 V1 to V4 orFigure 7 V1 to V6 therein) are impacted by the hot air flow distributed at a lower position ( Figure 6 V1' to V3' therein or Figure 7 V1' to V6' therein), and it is impossible to ensure that the hot air flow distributed at a higher position smoothly flows to the air outlet 34, causing the hot air flow distributed at a higher position to stay between the outer surrounding wall 10 and the inner surrounding wall 20, resulting in excessive local stress on the outer surrounding wall 10 and the inner surrounding wall 20 and being damaged. Therefore, in the present invention, a horizontal partition wall 35 is added, which ensures that the hot air flow flowing out from the sub-air ducts separated by the vertical partition wall 33 far from the air outlet 34 is smoothly discharged, further balancing the stress at each position on the outer surrounding wall 10 and the inner surrounding wall 20, and extending the service life of the furnace body.

[0050] The present invention does not specifically limit the number and setting position of the horizontal partition wall 35. For example, preferably, when a horizontal partition wall 35 is respectively provided in the two air ducts of the first air duct (180° → 90° → 0°) and the second air duct (180° → 270° → 0°), the two horizontal partition walls 35 are respectively flush with and connected to the top ends of the vertical partition wall 33 in the 90° direction and the vertical partition wall 33 in the 270° direction.

[0051] The present invention does not specifically limit the structure of the cooling section D3 of the coke dry quenching furnace. For example, optionally, as Figure 2 、 Figures 4 to 7 shown, the cooling section D3 includes a cooling section furnace wall 40 and a flow equalizing wall 50 provided at the top end of the cooling section furnace wall 40. The flow equalizing wall 50 is arranged around the top end of the cooling section furnace wall 40. One end of the flow equalizing wall 50 is connected to the outer surrounding wall 10, and the other end of the flow equalizing wall 50 is connected to the inner surrounding wall 20 to connect the transition section D2 with the top end of the cooling section furnace wall 40. A plurality of air outlet holes 51 are provided on the flow equalizing wall 50, and the air outlet holes 51 communicate the space between the vertical partition walls 33 in the annular air duct 30 with the cavity of the cooling section D3.

[0052] The present invention does not specifically limit the number of the vertical partition walls 33. For example, in order to ensure the control of the air flow velocity flowing out from each air outlet hole 51, preferably, in the annular air duct 30, each of the first sub-air ducts corresponds to an air outlet hole 51, and each of the second sub-air ducts corresponds to an air outlet hole 51.

[0053] It should be noted that in the present invention, the distance between the vertical partition walls 33 and the height of each vertical partition wall 33 can be adjusted according to the air flow velocity situation in actual production. For example, in order to ensure the uniformity of the gas flow velocity between the vertical partition walls 33, preferably, the height difference between the vertical partition walls 33 on both sides of the air outlet hole 51 with a higher air outlet velocity than the air outlet velocity of the adjacent air outlet hole 51 is greater than the height difference between the vertical partition walls 33 on both sides of the adjacent air outlet hole 51.

[0054] The present invention does not specifically limit the setting mode of the flow equalizing wall 50. For example, optionally, there is an angle less than 90° between the flow equalizing wall 50 and the axis of the coke dry quenching furnace.

[0055] The present invention does not specifically limit the material of the coke dry quenching furnace wall. For example, to ensure the adaptability of the furnace body to the coke dry quenching process, preferably, the wall of the coke dry quenching furnace is formed by stacking refractory bricks.

[0056] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A coke dry quenching furnace, which includes a pre-storage section, a transition section, and a cooling section arranged in sequence along the height direction. The cavities of the pre-storage section, the transition section, and the cooling section are interconnected. The transition section includes an outer surrounding wall and an inner surrounding wall. The inner surrounding wall surrounds the cavity of the transition section, and the outer surrounding wall surrounds the inner surrounding wall. An annular air duct is formed between the inner surrounding wall and the outer surrounding wall, and the annular air duct is communicated with the cooling section. It is characterized in that a first support wall and a plurality of vertical partition walls are arranged in the annular air duct. An air outlet is arranged on the outer surrounding wall. One side of the first support wall is connected to the inner surrounding wall, and the other side of the first support wall is connected to the outer surrounding wall. The first support wall and the air outlet divide the annular air duct into a first air duct and a second air duct that are isolated from each other. One side of the vertical partition wall is connected to the inner surrounding wall, and the other side of the vertical partition wall is connected to the outer surrounding wall. A plurality of the vertical partition walls are arranged in the first air duct to divide the first air duct into a plurality of first sub-air ducts. A plurality of the vertical partition walls are arranged in the second air duct to divide the second air duct into a plurality of second sub-air ducts. Both the first sub-air ducts and the second sub-air ducts can communicate the annular air duct with the cavity of the cooling section. Among them, when the gas at each position in the cavity of the cooling section enters the annular air duct of the transition section from the cooling section, it first enters the sub-air ducts between the vertical partition walls, then converges through the ventilation gaps reserved above the vertical partition walls, and flows along the arrangement direction of the annular air duct and discharges from the annular air duct. The cooling section includes a flow equalizing wall. One end of the flow equalizing wall is connected to the outer surrounding wall, and the other end of the flow equalizing wall is connected to the inner surrounding wall. A plurality of air outlet holes are arranged on the flow equalizing wall, and the air outlet holes communicate the space between the vertical partition walls in the annular air duct with the cavity of the cooling section. Each first sub-air duct corresponds to one air outlet hole, and each second sub-air duct corresponds to one air outlet hole. Among the plurality of vertical partition walls, the height of the vertical partition wall with a far circumferential distance from the air outlet is higher than the height of the vertical partition wall with a near circumferential distance from the air outlet. The first support wall is arranged opposite to the air outlet.

2. The coke dry quenching furnace according to claim 1, It is characterized in that the coke dry quenching furnace further includes a horizontal partition wall. One side of the horizontal partition wall is connected to the inner surrounding wall, and the other side of the horizontal partition wall is connected to the outer surrounding wall. One end of the horizontal partition wall is connected to one end of a vertical partition wall facing the pre-storage section, and the other end of the horizontal partition wall extends towards the direction of the air outlet.

3. The coke dry quenching furnace according to claim 1 or 2, It is characterized in that the cooling section further includes a cooling section furnace wall. The flow equalizing wall is arranged at the top of the cooling section furnace wall. The flow equalizing wall surrounds the top of the cooling section furnace wall, and the flow equalizing wall is used to connect the transition section with the top of the cooling section furnace wall.

4. The coke dry quenching furnace according to claim 1, It is characterized in that There is an angle less than 90° between the flow equalizing wall and the axis of the dry quenching furnace.

5. The dry quenching furnace according to claim 1 or 2, characterized in that, a second support wall is further arranged in the annular air duct, the second support wall is correspondingly arranged with the air outlet, and the second support wall is connected with the inner surrounding wall.

6. The dry quenching furnace according to claim 5, characterized in that, in the direction from the pre-storage section to the cooling section, the width of the second support wall gradually increases.

7. The dry quenching furnace according to claim 1 or 2, characterized in that, the vertical partition wall extends radially along the cavity of the transition section.

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