Multi-section chute of dry quenching furnace lining

Abstract

The utility model discloses a dry quenching furnace lining multi-section chute which comprises a chute inner wall and chute supporting walls evenly distributed on the chute inner wall, the number of the chute supporting walls is 24, expansion gaps are formed in the roots of the chute supporting walls respectively, chute area air ducts are arranged between every two adjacent chute supporting walls, and the chute area air ducts are communicated with the chute supporting walls. And a group of support wall inclined arches are arranged in the chute area air duct. The utility model has the beneficial effects that a single chute of the chute area furnace body structure is changed into a plurality of chutes to reduce the maximum flow rate of the chute area and the inlet pressure of the boiler, so that the condition of coke floating is avoided as far as possible under the condition of improving the circulating air volume and increasing the gas-material ratio, and the aim of improving the dry quenching treatment capacity is fulfilled; the expansion joint is additionally arranged at the root of the chute supporting wall, the thermal stress of the masonry structure can be reduced, and the overall structural strength of the chute supporting wall is enhanced and the service life of the chute is prolonged by improving the stress of the chute supporting wall.

Description

Technical Field

[0001] This utility model relates to the field of coking inclined duct technology, specifically a multi-segment inclined duct for dry quenching furnace lining. Background Technology

[0002] Most dry quenching units use a single inclined chute in the inclined section of the quenching furnace. Due to the cost reduction and coal blending adjustments made by enterprises in recent years, the average particle size of coke has decreased, leading to an increase in the resistance of the dry quenching furnace itself. This is mainly reflected in the boiler inlet pressure of 0.85~0.95 kPa, which limits the airflow of the circulating fan, resulting in a decrease in processing capacity. Before the modification, the actual processing capacity was about 120 t / h. The equipment is aging and the airtightness of the circulation system has decreased. The negative pressure section has serious air leakage and high O2 content, about 1.4%~2%. The air leakage in the negative pressure section leads to an increase in the oxygen content in the circulating gas entering the dry quenching furnace, resulting in large coke burn-off in the dry quenching furnace. The coke combustion provides additional heat, resulting in high coke discharge temperature and poor coke cooling effect.

[0003] The heat exchange efficiency of the heat pipe heat exchanger decreased significantly, and the temperature of the circulating gas entering the dry quenching furnace was too high (160±5℃). The high temperature of the circulating gas at the outlet of the heat pipe heat exchanger was also one of the reasons for the high coke discharge temperature, which was about 260±10℃. Utility Model Content

[0004] To address the above-mentioned shortcomings, this utility model provides a multi-segment inclined chute lining for a dry quenching furnace, which solves the problems of high coke discharge temperature and poor coke cooling effect.

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

[0006] A multi-segment inclined duct lining for a dry quenching furnace includes an inner wall of the inclined duct and inclined duct support walls evenly distributed on the inner wall of the inclined duct. The number of inclined duct support walls is 24, and expansion joints are provided at the base of each inclined duct support wall. An inclined duct area air duct is provided between adjacent groups of inclined duct support walls, and a set of inclined arches of support walls is provided in the inclined duct area air duct.

[0007] Furthermore, the lower part of the inner wall of the inclined duct is connected to the lower furnace wall lining of the dry quenching furnace, and the upper part is connected to the outer wall of the upper annular air duct in the inclined duct area.

[0008] Furthermore, the upper part of the inclined support wall is connected to the overhead support wall, and the upper part of the overhead support wall is connected to the inner wall of the annular air duct in the inclined area. The straight section of the inner wall of the annular air duct is a two-ring brick structure along the circumference.

[0009] Furthermore, the annular air duct is located between the outer wall and the inner wall of the annular air duct, and the annular air duct is connected to the air duct in the inclined section.

[0010] Furthermore, a set of inclined arches supporting the wall are located between a set of inclined support walls opposite to the set of inclined support walls, and are arranged in parallel to the set of inclined arches supporting the wall.

[0011] This utility model provides a multi-segment inclined channel lining for a dry quenching furnace, which has the following beneficial effects: by changing the single inclined channel of the furnace body structure in the inclined channel area to a multi-segment inclined channel, the maximum flow velocity and boiler inlet pressure in the inclined channel area are reduced, thereby increasing the circulating air volume and the gas-to-material ratio while minimizing coke buoyancy, thus improving the dry quenching coke processing capacity. The addition of expansion joints at the base of the inclined channel support wall can reduce the thermal stress of the masonry structure, thereby improving the stress on the inclined channel support wall, enhancing the overall structural strength of the inclined channel support wall, and extending the service life of the inclined channel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a multi-segment inclined channel lining for a dry quenching furnace as described in this utility model.

[0013] Figure 2 This is a schematic diagram of the multi-segment inclined gluing system of this utility model.

[0014] Figure 3 This is a diagram of the 24 bolt holes in the multi-segment inclined slide of this utility model.

[0015] In the diagram: 1. Inner wall of the inclined duct; 2. Supporting wall; 3. Expansion joint; 4. Air duct in the inclined duct area; 5. Inclined arch of the supporting wall; 6. Furnace wall lining; 7. Outer wall of the annular air duct; 8. Supporting wall over the top; 9. Inner wall of the annular air duct; 10. Annular air duct. Detailed Implementation

[0016] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] Please see Figure 1 and Figure 2 As shown in the embodiment of this application, a multi-segment inclined channel is provided for the lining of a dry quenching furnace, including an inclined channel inner wall 1 and inclined channel support walls 2 evenly distributed on the inclined channel inner wall 1. There are 24 inclined channel support walls 2, and expansion joints 3 are respectively provided at the root of the inclined channel support walls 2. An inclined channel area air duct 4 is provided between adjacent groups of inclined channel support walls 2, and a group of support wall inclined arches 5 are provided in the inclined channel area air duct 4.

[0018] In this embodiment, by changing the single inclined section of the furnace structure in the inclined section to a multi-inclined section, the maximum flow velocity and boiler inlet pressure in the inclined section are reduced. This achieves the goal of increasing the circulating air volume and the gas-to-material ratio while minimizing coke buoyancy, thus improving the dry quenching capacity. The multi-segmented inclined section maintains the same inlet area and angle, while the inclined section baffle divides the coke surface length into multiple segments. The coke accumulation thickness is significantly reduced in each inclined section, effectively lowering the coke layer resistance and thus eliminating coke buoyancy. An expansion joint 3 is added to the base of the inclined section support wall 2, reducing the thermal stress of the masonry structure. By improving the stress on the inclined section support wall 2, the overall structural strength of the inclined section support wall 2 is enhanced, extending the service life of the inclined section.

[0019] In some embodiments, the lower part of the inclined duct inner wall 1 is connected to the lower furnace wall lining 6 of the dry quenching furnace, and the upper part is connected to the outer wall 7 of the upper annular air duct in the inclined duct area.

[0020] In some embodiments, the upper part of the inclined support wall 2 is connected to the support wall over the top 8, and the upper part of the support wall over the top 8 is connected to the inner wall 9 of the annular air duct in the inclined area. The straight section of the inner wall 9 of the annular air duct is a two-ring brick structure along the circumferential direction. The two-layer structure can effectively reduce the additional internal stress of the brick caused by the large temperature difference between the inside and outside of the single ring brick, avoid cracks in the inner wall bricks, and increase the structural strength of the inner wall.

[0021] In some embodiments, an annular duct 10 is formed between the outer wall 7 and the inner wall 9 of the annular duct. The annular duct 10 is connected to the duct 4 of the inclined section. The number of the sealed boxes of the air intake pipe and the bypass pipe, and the lower part of the branch pipe connected to the sealed box, are matched with the number of inclined support walls 2.

[0022] In some embodiments, a set of inclined arches 5 supporting the support wall are located between a set of inclined support walls 2 and are arranged in parallel with the set of inclined arches 5 supporting the support wall. Before commissioning, an airtightness test is required. The airtightness test is carried out by leak detection method to check the location of air leakage in the negative pressure section of the system and seal the leaking parts so that the oxygen content in the circulating gas at the inlet of the dry quenching furnace is <1% after normal production, thereby reducing the coke burn-off rate. The heat pipe heat exchanger is replaced and its capacity is increased to reduce the temperature of the circulating gas at the inlet of the dry quenching furnace to <140±5℃, effectively reducing the current coke discharge temperature of the dry quenching furnace to 200±20℃.

[0023] In some embodiments, such as Figure 3 As shown, the original 30 central bolt holes were changed to 24 central bolt holes. The central bolt holes are located in the upper part of the inclined duct and are part of the annular flue of the dry quenching furnace. The central bolt holes are mainly used to observe and adjust the airflow state in the inclined duct. Through the central bolt holes, the operator can check the gas flow in the inclined duct and make necessary adjustments to ensure the normal operation of the dry quenching furnace.

[0024] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A multi-segment inclined duct lining for a dry quenching furnace, comprising an inner wall of the inclined duct (1) and inclined duct support walls (2) uniformly distributed on the inner wall of the inclined duct (1), characterized in that, The number of inclined support walls (2) is 24, and expansion joints (3) are set at the root of each inclined support wall (2). An inclined area air duct (4) is set between adjacent groups of inclined support walls (2), and a set of support wall inclined arches (5) is set in the inclined area air duct (4).

2. The multi-segment inclined chute lining of a dry quenching furnace according to claim 1, characterized in that, The lower part of the inclined duct inner wall (1) is connected to the lower furnace wall lining (6) of the dry quenching furnace, and the upper part is connected to the outer wall (7) of the upper annular air duct in the inclined duct area.

3. The multi-segment inclined chute lining of a dry quenching furnace according to claim 1, characterized in that, The upper part of the inclined support wall (2) is connected to the support wall over the top (8), and the upper part of the support wall over the top (8) is connected to the inner wall (9) of the annular air duct in the inclined area. The straight section of the inner wall (9) of the annular air duct is a two-ring brick structure along the circumferential direction.

4. The multi-segment inclined chute lining of a dry quenching furnace according to claim 2, characterized in that, The annular air duct outer wall (7) and the annular air duct inner wall (9) form an annular air duct (10), which is connected to the inclined air duct (4).

5. The multi-segment inclined chute lining of a dry quenching furnace according to claim 1, characterized in that, A set of inclined arches (5) supporting the wall are located between a set of inclined support walls (2) and are set in parallel to the set of inclined arches (5).

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