Double chute structure assembly based on dry coke quenching oven

Abstract

The invention discloses a double-inclined channel structure assembly in a dry coke quenching oven, belonging to the technical field of dry coke quenching ovens, comprising an upper inclined channel, a lower inclined channel and a corbel section in the middle of the inclined channel, wherein the corbel section in the middle of the inclined channel comprises a plurality of corbels supporting an annular air duct and a vault crossbeam arranged above the corbels and connected to the inner wall of the annular air duct; the invention changes the original single inclined channel into a double inclined channel by adding a corbel oblique arch wall in the middle of the corbel, on the one hand, the middle part of the corbel is supported by the left and right sides of the corbel oblique arch wall, so that the displacement is limited when the corbel is expanded, thereby increasing the stability of the corbel; on the other hand, the double air duct serves the purpose of uniformizing the flow rate of smoke and dust in the inclined channel area, avoiding excessive impact of excessive airflow on the vault crossbeam and the inner wall of the annular air duct on the inner side of the upper part of the inclined channel, and effectively suppressing the floating of coke to a certain extent; in addition, the connection structure between the lower part of the inclined channel, the corbels and the corbel oblique arch wall is improved, and the stress condition of the inclined channel is optimized.

Description

Technical Field

[0001] The invention relates to the technical field of dry quenching coke ovens, and more particularly to a double chute structure assembly in a dry quenching coke oven. Background Art

[0002] Dry coke quenching has the functions of energy saving and consumption reduction, environmental protection and improving coke quality. It has been used more and more widely in recent years. The dry coke quenching oven is the key equipment of dry coke quenching technology. From top to bottom, it includes a pre-storage area, an annular air duct area, a ramp area and a cooling area.

[0003] The service life of the CDQ oven is largely determined by the service life of the refractory lining structure in the chute area. In the past, a single chute structure was used. The corbels in the single chute area were built with multiple layers of corbel bricks to support the inner ring wall of the CDQ oven's annular air duct.

[0004] However, the middle part of the monocline bracket in the monocline structure is suspended in the air without support, and is prone to displacement when expansion occurs. In addition, the bracket is prone to wear, cracking, and even collapse due to the heavy load, frequent operating temperature fluctuations, and long-term erosion by high-temperature coke and high-temperature circulating airflow containing coke powder in the dry quenching coke oven. This reduces the safety of the dry quenching coke oven production and limits the service life of the dry quenching coke oven.

[0005] To this end, we propose a double chute structure assembly based on a dry quenching coke oven to address the existing technical problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problems that the middle part of the existing single-incline corbel is suspended in the air without support, which is easy to be displaced when expanding, and the annular air duct on the single-incline is more susceptible to smoke and dust impact. Compared with the prior art, a double-incline structure assembly in a dry quenching coke oven is provided.

[0007] The object of the present invention can be achieved by the following technical scheme: based on the double chute structure assembly in the dry quenching coke oven, it includes the upper part of the chute, the lower part of the chute and the middle part of the chute, the middle part of the chute includes a plurality of corbels supporting the annular air duct and a vault crossbeam arranged above the corbels and connected to the inner wall of the annular air duct, the inner side inclined surface of the lower part of the chute is provided with an outer arch supporting surface extending from bottom to top toward the upper part of the chute, the outer arch supporting surface is integrally stacked with the lower part of the chute, and a plurality of corbels are stacked on the outer arch supporting surface;

[0008] A corbel oblique arch wall connected with two adjacent corbels is embedded and installed inside the air duct of each oblique channel area, and the corbel oblique arch wall is arranged obliquely upward along the end surface of the outer arch supporting surface.

[0009] Furthermore, the corbel is formed by alternately laying a whole brick and two half bricks on the outer arch supporting surface, and gradually extends outward and is connected between the bottom end wall of the arch top crossbeam and the bottom end wall of the outer arch supporting surface.

[0010] Furthermore, the horizontal cross-section of the corbel is a trapezoidal structure with a width gradually decreasing from the lower part of the ramp toward the center of the vault crossbeam, thereby reducing the stress points on the windward surface.

[0011] Furthermore, the multiple corbels divide the space formed between the arch crown beam and the outer arch supporting surface into multiple inclined channel area air ducts, and the corbel oblique arch wall divides a single inclined channel area air duct into an upper air duct and a lower air duct. The additional corbel oblique arch wall allows the middle part of two adjacent corbels to be supported by left and right support surfaces. In addition, the single air duct is changed into a double air duct with upper and lower circulation spaces. The double air duct serves the purpose of uniformizing the smoke flow rate in the inclined channel area and effectively suppresses the floating of coke.

[0012] Furthermore, the corbel inclined arch wall is arranged at the upper end of the air duct in the inclined channel area, and the area of ​​the upper air duct is smaller than that of the lower air duct, so that most of the smoke and dust flow upward from the lower air duct, effectively avoiding excessive impact of excessive airflow on the arch top beam and the inner wall of the annular air duct on the inner side of the upper part of the inclined channel.

[0013] Furthermore, the lower end of the arch beam is provided with a stacking surface which is interlocked and docked with the upper end of the corbel, the stacking surface is an irregular concave structure, and the upper end of the arch beam is provided with a convex portion with an annular edge extending outward, and the upper end wall of the corbel is provided with an interlocking groove which is interlocked and docked with the convex portion and the stacking surface, which is beneficial to improving the stability of the corbel to the supporting surface of the arch beam.

[0014] Furthermore, the bottom end of the corbel oblique arch wall is provided with an arch supporting brick column which is also fixedly mounted on the end face of the outer arch supporting surface, and the inner end wall of the corbel oblique arch wall is fixedly connected to the end wall of the outer arch supporting surface via a plurality of reinforcing steel bars.

[0015] Furthermore, the upper and lower ends of the corbel inclined arch wall are provided with guide surfaces inclined toward the wind duct in the inclined channel area, and both sides of the lower end of the corbel inclined arch wall are provided with extended protrusions that are engaged with the outer end walls of the two adjacent corbels. Adding arch-bearing brick columns, reinforcing steel bars and extended protrusion structures is beneficial to enhancing the stability of the corbel inclined arch wall between the two corbels and improving the strength of use. The guide surfaces inclined toward the wind duct in the inclined channel area are provided at the upper and lower ends of the corbel inclined arch wall, which has a function of guiding and removing smoke and dust, and is beneficial to the sedimentation of smoke and dust particles.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The double inclined channel of this scheme is to add a corbel oblique arch wall in the middle of the original single inclined channel, and change the single air duct into a double air duct with two upper and lower circulation spaces. On the one hand, the middle part of the corbel is supported by the left and right sides of the corbel oblique arch wall, so that its displacement is limited when it expands, thereby increasing the stability of the corbel. On the other hand, the double air duct serves to even out the smoke flow velocity in the inclined channel area, avoiding excessive impact of excessive airflow on the arch beam and the inner wall of the annular air duct on the inner side of the upper part of the inclined channel, and effectively suppressing the floating of coke to a certain extent. In addition, the connection structure between the lower part of the inclined channel, the corbel and the corbel oblique arch wall is improved to optimize the stress condition of the inclined channel.

[0018] (2) This scheme also provides an outer arch support surface that is integrally formed with the lower inner end surface of the ramp, which is conducive to more evenly distributing the smoke pressure when the smoke is introduced into the ramp area air duct along the outer arch support surface, reducing the occurrence of local high-pressure points, and to a certain extent reducing the impact of smoke on the air duct structure, thereby improving the pressure resistance of the ramp area air duct and the inner wall of the annular air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the bottom structure of the present invention;

[0020] Figure 2 is a top cross-sectional view of the present invention;

[0021] Figure 3 is a side sectional view of the present invention;

[0022] Figure 4 It is a cross-sectional view of the junction of the upper part of the ramp, the lower part of the ramp and the arch cross beam of the present invention;

[0023] Figure 5 A side cross-sectional view from another perspective of the present invention;

[0024] Figure 6 It is a top cross-sectional view of the junction of the corbel and the corbel oblique arch wall of the present invention;

[0025] Figure 7 It is the overall internal cross-sectional view of the present invention when the smoke is diverted and discharged;

[0026] Figure 8 It is a structural schematic diagram of the joint between a pair of corbels and the corbel oblique arch wall of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the corbel oblique arch wall of the present invention when it is separated from the arch supporting brick column;

[0028] Fig.10 This is a schematic diagram of the state when the present invention uses the corbel oblique arch wall to guide smoke and dust;

[0029] Description of the numbers in the figure:

[0030] 1. Upper part of the ramp; 2. Lower part of the ramp; 3. Arch crossbeam; 301. Masonry surface; 302. Convex part; 4. External arch support surface; 5. Supporting ring beam; 6. Corbel; 7. Corbel oblique arch wall; 701. Extended protrusion; 702. Reinforcement steel bars; 8. Arch supporting brick column. DETAILED DESCRIPTION

[0031] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0032] Example 1: The present invention discloses a double chute structure assembly based on a dry coke quenching oven, see Figure 1-Figure 4 , including an upper ramp portion 1, a lower ramp portion 2 and a middle ramp bracket section, the middle ramp bracket section includes a plurality of brackets 6 supporting the annular air duct and an arch crossbeam 3 arranged above the brackets 6 and connected to the inner wall of the annular air duct, and an outer arch support surface 4 extending from bottom to top and bending toward the upper ramp portion 1 is provided on the inner side inclined surface of the lower ramp portion 2;

[0033] The outer arch supporting surface 4 and the lower part 2 of the ramp are integrally stacked, and a plurality of corbels 6 are stacked on the outer arch supporting surface 4. The corbels 6 are formed by alternately building a whole brick and two half bricks on the outer arch supporting surface 4, and gradually extend outward and connect between the bottom end wall of the arch cross beam 3 and the bottom end wall of the outer arch supporting surface 4. Silicon carbide bricks are selected as refractory materials for the ramp area.

[0034] See also Figure 3-Figure 7 , multiple corbels 6 divide the space formed between the arch crossbeam 3 and the outer arch support surface 4 into multiple inclined channel area air ducts, and a corbel oblique arch wall 7 connected with two adjacent corbels 6 is embedded and installed inside each inclined channel area air duct, so that the middle part of the corbel 6 is supported by the left and right corbel oblique arch wall 7, so that the displacement is limited when it expands, and the stability of the corbel 6 is increased. The corbel oblique arch wall 7 is arranged upwardly along the end face of the outer arch support surface 4. The corbel oblique arch wall 7 divides a single inclined channel area air duct into an upper air duct and a lower air duct. The additional corbel oblique arch wall 7 allows the middle part of two adjacent corbels 6 to be supported by the left and right support surfaces;

[0035] In addition, the single air duct is changed into a double air duct with two upper and lower circulation spaces. The double air duct serves the purpose of equalizing the smoke flow velocity in the inclined channel area and effectively suppressing the floating of coke. That is, the thickness of coke accumulation in each inclined channel is significantly reduced, which can effectively reduce the resistance of the coke layer, reduce the pressure difference between the upper and lower surfaces of the coke layer, and effectively eliminate the floating of coke.

[0036] The use of a two-stage inclined channel can reduce the air flow velocity in the inclined channel to about 60% to 70% of the air flow velocity in a single inclined channel under the same conditions, increase the maximum processing capacity to prevent coke from floating by about 35% to 40%, and reduce the wear of the annular air channel by coarse coke powder. When the uniformity of the gas flow rate is improved, the heat transfer efficiency is improved, the gas flow rate is increased, and the steam production can be increased.

[0037] The corbel inclined arch wall 7 is arranged at the upper end of the air duct in the inclined channel area, and the area of ​​the upper air duct is smaller than that of the lower air duct, so that most of the smoke and dust flow upward from the lower air duct, further effectively avoiding excessive impact of excessive airflow on the arch top beam 3 and the inner wall of the annular air duct on the inner side of the upper part 1 of the inclined channel, and resisting certain thermal stress.

[0038] Setting the inner end surface of the lower part 2 of the ramp as an arc-shaped surface that is wider at the bottom and narrower at the top is beneficial for more evenly distributing the smoke pressure during the process of smoke being introduced into the wind duct in the ramp area along the outer arch supporting surface 4, reducing the occurrence of local high-pressure points, and to a certain extent reducing the impact of smoke on the wind duct structure, thereby improving the pressure resistance of the wind duct in the ramp area and the inner wall of the annular wind duct.

[0039] Embodiment 2: Based on Embodiment 1, this embodiment improves the connection structure between the arch cross beam 3, the corbel 6, and the corbel oblique arch wall 7 to optimize the force condition of the ramp, as follows:

[0040] See also Figure 6 and Figure 8 The horizontal cross section of the corbel 6 is a trapezoidal structure with a width gradually decreasing from the lower portion 2 of the ramp to the center of the vault beam 3. On the one hand, the stability of the corbel 6 is improved by the masonry structure and the trapezoidal design. On the other hand, the width of the corbel 6 gradually decreases in the direction of the vault beam 3, forming a windward surface inclined from bottom to top, reducing the stress on the windward surface.

[0041] See also Figure 3 , Figure 4 The lower end of the vault crossbeam 3 is provided with a stacking surface 301 which is engaged and docked with the upper end of the corbel 6. The stacking surface 301 is an irregular concave structure, and the upper end of the vault crossbeam 3 is provided with a convex portion 302 with an annular edge extending outward. The upper end wall of the corbel 6 is provided with an engaging groove which is engaged and docked with the convex portion 302 and the stacking surface 301, which is beneficial to improving the supporting surface of the corbel 6 on the vault crossbeam 3 and improving the connection stability at the supporting surface.

[0042] See also Figure 5-Figure 10The bottom end of the corbel oblique arch wall 7 is provided with an arch supporting brick column 8 which is also fixedly installed on the end face of the outer arch supporting surface 4. The inner end wall of the corbel oblique arch wall 7 is fixedly connected to the end wall of the outer arch supporting surface 4 through a plurality of reinforcing steel bars 702. The upper and lower ends of the corbel oblique arch wall 7 are provided with guide surfaces inclined toward the wind duct in the inclined channel area, and both sides of the lower end of the corbel oblique arch wall 7 are provided with extension protrusions 701 which are engaged with the outer end walls of two adjacent corbels 6;

[0043] Adding arch supporting brick columns 8, reinforcing steel bars 702, and extending the protrusion 701 structure is beneficial to enhancing the stability of the corbel oblique arch wall 7 located between the two corbels 6 and improving the strength of use. The guide surfaces inclined toward the wind duct in the inclined channel area are arranged at the upper and lower ends of the corbel oblique arch wall 7, which play a role in guiding and removing dust from the smoke and dust, and are beneficial to the sedimentation of the smoke and dust particles.

[0044] In summary, the corbel oblique arch wall 7 is added one by one between two adjacent corbels 6 in a plurality of groups, the original single inclined channel area is changed into a double inclined channel area, and the single air duct in the original single inclined channel area is changed into a double air duct with two upper and lower circulation spaces. On the one hand, the middle part of the corbel 6 is supported by the left and right corbel oblique arch wall 7, so that the displacement is limited when it expands, and the stability of the corbel is increased. On the other hand, the double air duct serves to even out the flow rate of smoke in the inclined channel area, avoid excessive impact of excessive airflow on the arch cross beam 3 and the inner wall of the annular air duct on the inner side of the upper part 1 of the inclined channel, and effectively suppress the floating of coke to a certain extent.

[0045] In addition, an outer arch supporting surface 4 formed integrally with the lower part 2 of the ramp is provided on the inner end face thereof, which is beneficial to more evenly distribute the smoke pressure during the process of smoke being introduced into the wind duct in the ramp area along the outer arch supporting surface 4, and reduce the occurrence of local high-pressure points. To a certain extent, it can alleviate the impact of smoke on the wind duct structure, and improve the pressure resistance of the wind duct in the ramp area and the inner wall of the annular wind duct. For the outer arch supporting surface 4 which is more difficult to construct, the connection structure between the arch top beam 3, the corbel 6 and the corbel oblique arch wall 7 is improved, and the stress condition of the ramp is optimized to improve the connection stability between the corbel 6 and the corbel oblique arch wall 7 between the outer arch supporting surface 4 and the arch top beam 3, and improve the overall mechanical strength of the ramp.

[0046] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A double chute structure assembly in a dry coke quenching oven, comprising an upper chute portion (1), a lower chute portion (2) and a middle chute bracket section, characterized in that: The middle bracket section of the ramp comprises a plurality of brackets (6) supporting the annular air duct and a vault crossbeam (3) arranged above the brackets (6) and connected to the inner wall of the annular air duct, the inner inclined surface of the lower portion (2) of the ramp is provided with an outer arch support surface (4) extending from bottom to top toward the upper portion (1) of the ramp, the outer arch support surface (4) and the lower portion (2) of the ramp are integrally stacked, and a plurality of brackets (6) are stacked on the outer arch support surface (4); Each of the wind ducts in the inclined channel area is embedded with a corbel oblique arch wall (7) connected to two adjacent corbels (6), and the corbel oblique arch wall (7) is arranged to be inclined upward along the end surface of the outer arch support surface (4); The corbel (6) is formed by alternately laying a whole brick and two half bricks on the outer arch support surface (4), and gradually extends outwards and is connected between the bottom end wall of the arch cross beam (3) and the bottom end wall of the outer arch support surface (4). The horizontal cross section of the corbel (6) is a trapezoidal structure with a width gradually decreasing in the direction from the lower part of the ramp (2) to the center of the arch cross beam (3).

2. The double chute structure assembly in a dry coke quenching oven according to claim 1 is characterized in that: The plurality of corbels (6) divide the space formed between the arch crossbeam (3) and the outer arch supporting surface (4) into a plurality of inclined channel area air ducts, and the corbel inclined arch wall (7) divides a single inclined channel area air duct into an upper air duct and a lower air duct.

3. The double chute structure assembly in a dry coke quenching oven according to claim 1 is characterized in that: The corbel oblique arch wall (7) is arranged at the upper end of the wind duct in the oblique duct area, and the area of ​​the upper wind duct is smaller than the area of ​​the lower wind duct.

4. The double chute structure assembly in a dry coke quenching oven according to claim 1 is characterized in that: The lower end of the arch cross beam (3) is provided with a stacking surface (301) that is matingly connected with the upper end of the corbel (6); the stacking surface (301) is an irregular concave structure, and the upper end of the arch cross beam (3) is provided with a convex portion (302) with an annular edge extending outward, and the upper end wall of the corbel (6) is provided with a mating groove that is matingly connected with the convex portion (302) and the stacking surface (301).

5. The double chute structure assembly in a dry coke quenching oven according to claim 1 is characterized in that: The bottom end of the corbel oblique arch wall (7) is provided with an arch supporting brick column (8) which is also fixedly mounted on the end face of the outer arch supporting surface (4); the inner end wall of the corbel oblique arch wall (7) is fixedly connected to the end wall of the outer arch supporting surface (4) via a plurality of reinforcing steel bars (702).

6. The double chute structure assembly in a dry coke quenching oven according to claim 1, characterized in that: The upper and lower ends of the corbel oblique arch wall (7) are both provided with guide surfaces inclined toward the wind channel in the inclined channel area, and both sides of the lower end of the corbel oblique arch wall (7) are provided with extension protrusions (701) that are engaged with the outer end walls of two adjacent corbels (6).

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