Sealing structure for feed opening of dry quenching coke tank

Abstract

The utility model belongs to the technical field of dry quenching coke tanks, and particularly relates to a sealing structure for a feed opening of a dry quenching coke tank, which is characterized in that a vertical plate, an inclined plate and a flat plate are arranged on the outer side of a lining plate of the feed opening of the coke tank to form an annular groove body with an opening at the bottom, and the bottom of the annular groove body is opposite to the outermost lining plate of a bottom gate. A heat-resistant sealing ring is arranged between the flat plate and the outermost ring lining plate of the bottom gate, an upward boss is arranged at the position, corresponding to the opening of the annular groove body, of the outermost ring lining plate of the bottom gate, and a sealing steel ring is arranged between the boss and the lower edge of the coke pot feed opening lining plate. Compared with the prior art, the utility model has the beneficial effects that the two sealing mechanisms are adopted, so that the speed of external inlet gas can be quickly reduced, the suction of air is effectively reduced, the temperature rise of the lower structure is avoided, the long-term stable use of the coke tank is ensured, and the service life of the coke tank is effectively prolonged; the ablation rate of the red coke in the transportation process is reduced, the energy is saved, and the operation cost of a factory is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dry coke quenching coke tanks, and in particular relates to a sealing structure for a discharge port of a dry coke quenching coke tank. Background Art

[0002] CDQ technology is a very practical energy-saving and environmentally friendly quenching technology. It has been widely used and popularized in China in the past 20 years. CDQ coke drum is an important equipment for transporting red coke between coke oven and CDQ furnace. The coke drum consists of the coke drum body, bottom gate and lining. In the application of various coking plants, it is generally reported that the lining and tank body at the coke drum discharge port are always the first to be damaged.

[0003] Cross-section of traditional coke tank Figure 1 , the outermost ring lining plate (3) of the bottom gate of the traditional coke tank is fixed on the bottom gate (4). The inclined plate (6) has dozens of openings in the circumferential direction for mounting the lining plate (2) of the discharge port of the traditional coke tank. Coke powder is easily gathered in this space. Since coke burns during transportation, a chimney effect is produced, and a large amount of air is sucked into the gap between the outermost ring lining plate (3) of the bottom gate of the traditional coke tank and the upper traditional coke tank body (1) to assist combustion. Therefore, during the transportation of coke, the temperature at this position is higher than that at other positions. It is easy to cause the failure of the lining plate (2) of the discharge port of the traditional coke tank, and then the lower structure of the coke tank body (1) is bent due to heat. At this time, coke powder enters and gathers, the gap expands, and the above-mentioned unfavorable factors are strengthened, causing the coke tank body (1) and the lining plate (2) of the discharge port of the coke tank to fail more quickly.

[0004] The specific reasons are as follows: 1) Coke impact. When the bottom gate is opened downward, the coke falls due to gravity, and in the process, it has an impact on the inclined lining. 2) High temperature deformation. During the transportation of coke, the coke temperature is 1050 degrees Celsius and is in a burning state. Because there is a gap between the bottom gate and the coke tank. In the entire circumference, there are places where the gap is relatively large because the coke and coke powder are not discharged cleanly. Therefore, during the transportation of the coke tank, a large amount of air is inhaled there, causing the coke there to burn violently and the temperature is higher than other positions. Therefore, the lining and tank body at this location are prone to deformation or damage. 3) Coke powder accumulation and extrusion. When loading coke into the dry quenching furnace, a positive pressure will be formed on the top of the furnace in a short period of time, and the coke powder will blow upward, and will enter the box at the bottom of the tank along the gap between the lining and the tank body and accumulate. Because the coke at the head of the coke oven and the coke at the tail of the coke oven are not fully distilled, the coke powder has a certain degree of adhesion. If the coke powder accumulates and sticks for a long time, it will cause loose contact between the liner and the tank body, thereby increasing the impact of the coke on the liner and causing damage to the liner and the tank body.

[0005] Taking all the above factors into consideration, the structural design of the coke drum discharge port has a decisive influence on the service life of the coke drum. Improving and optimizing the sealing structure of the CDQ coke drum discharge port will increase the service life of the coke drum, reduce the ablation rate of coke during coke transportation, and save resources. Utility Model Content

[0006] The utility model aims to provide a sealing structure for a discharge port of a dry coke quenching coke drum, which overcomes the shortcomings of the prior art, improves the sealing performance of the discharge port of the dry coke quenching coke drum, prevents air from entering, reduces the ablation rate during the transportation of red coke, saves energy, and improves the quality of coke; prevents the adverse effects of coke powder aggregation on the liner and the tank body, and increases the service life of the liner and the steel structure of the discharge port of the coke drum.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] A sealing structure for a discharge port of a dry coke quenching coke drum comprises a discharge port lining plate of a coke drum and an outermost ring lining plate of a bottom gate, wherein the outermost ring lining plate of the bottom gate is located at the upper edge of the bottom gate of the coke drum, and the discharge port lining plate of the coke drum is located on the bottom side wall of the coke drum body, and is characterized in that the outer side of the discharge port lining plate of the coke drum is composed of a vertical plate, an inclined plate and a flat plate to form an annular trough body with an opening at the bottom, the bottom of the annular trough body corresponds to the position of the outermost ring lining plate of the bottom gate, a heat-resistant sealing ring is provided between the flat plate and the outermost ring lining plate of the bottom gate, an upward boss is provided on the outermost ring lining plate of the bottom gate corresponding to the opening of the annular trough body, and a sealing steel ring is provided between the boss and the lower edge of the discharge port lining plate of the coke drum.

[0009] Furthermore, a labyrinth sealing structure is formed between the sealing steel ring, the outermost lining plate of the bottom gate, and the lining plate of the coke drum discharge port, the boss is provided with a 45° bevel relative to the direction of the lining plate of the coke drum discharge port, a gap A is formed between the sealing steel ring and the outermost lining plate platform of the bottom gate, a gap B is formed between the sealing steel ring and the 45° bevel edge of the boss, a gap C is formed between the outermost lining plate of the bottom gate and the lining plate of the coke drum discharge port, and a gap D is formed between the sealing steel ring and the lining plate of the coke drum discharge port.

[0010] Furthermore, a sealing protrusion is vertically connected to the lower edge of the lining plate of the coke drum discharge port, and the lower edge of the sealing protrusion is rounded.

[0011] Furthermore, the size of the gap B and the gap C is ≤10 mm, and the size of the gap A and the gap D is ≤20 mm.

[0012] Furthermore, a heat-resistant sealing ring is installed on the lower surface of the flat plate. The material of the heat-resistant sealing ring is refractory fiber. The heat-resistant sealing ring is connected to a mounting seat on the lower surface of the flat plate by bolts.

[0013] Furthermore, the inclined plate is provided with a square opening in the circumferential direction for installing a lining plate of the coke drum discharge port, and a heat-resistant fiber layer is laid between the inclined plate and the lining plate of the coke drum discharge port for heat insulation.

[0014] Furthermore, the lower edges of the inclined plate and the heat-resistant fiber layer are located on the upper edge of the sealing steel ring.

[0015] Furthermore, a plurality of rib plates are provided between the inclined plate and the vertical plate.

[0016] Furthermore, the installation position of the sealing steel ring in the circumferential direction is adjusted according to the spacing between the sealing steel ring and the adjacent structure, and the diameters of the sealing steel rings of different parts are the same or different.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1) The two sealing mechanisms of the utility model strengthen the lower end of the lining plate of the coke tank discharge port, reducing the damage caused by the impact on the lower part of the lining plate when the coke is discharged;

[0019] 2) The two-stage sealing mechanism of the utility model can quickly decelerate the external gas, effectively reduce the air intake, avoid the temperature increase of the lower structure, ensure the long-term stable use of the coke tank, and effectively increase the service life of the coke tank;

[0020] 3) The utility model reduces the ablation rate of red coke during transportation, saves energy, and improves the quality of coke. Since the annual production capacity of the coking plant is huge, the economic value of the utility model is considerable, and the operating cost of the plant is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional view of a traditional coke tank;

[0022] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model;

[0023] Figure 3 yes Figure 2 A magnified view of the local structure at point A.

[0024] In the figure: 1-coke tank body, 2-coke tank discharge port lining, 3-outermost ring lining of bottom gate, 4-coke tank bottom gate, 5-flat plate, 6-inclined plate, 7-vertical plate, 8-sealing steel ring, 9-heat-resistant fiber layer, 10-rib plate, 11-trough body, 12-boss, 13-heat-resistant sealing ring, 14-sealing protrusion, 15-mounting seat. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0027] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0028] See Figure 2-3 , is a schematic structural diagram of an embodiment of a sealing structure of a coke drum discharge port for dry quenching of coke according to the utility model, comprising a coke drum discharge port lining plate 2 and an outermost ring lining plate 3 of a bottom gate, the outermost ring lining plate 3 of the bottom gate being located at the upper edge of the coke drum bottom gate 4, the coke drum discharge port lining plate 2 being located on the bottom side wall of the coke drum body 1, the outer side of the coke drum discharge port lining plate 2 being composed of a vertical plate 7, an inclined plate 6 and a flat plate 5 to form an annular groove body 11 with an opening at the bottom, the annular groove body 11 forming a stable force-bearing structure, the bottom of the annular groove body 11 being opposite to the outermost ring lining plate 3 of the bottom gate, a heat-resistant sealing ring 13 being provided between the flat plate 5 and the outermost ring lining plate 3 of the bottom gate, an upward boss 12 being provided on the outermost ring lining plate 3 of the bottom gate corresponding to the opening of the annular groove body 11, a sealing steel ring 8 being provided between the boss 12 and the lower edge of the lining plate 2 of the coke drum discharge port.

[0029] A labyrinth seal structure is formed between the sealing steel ring 8, the outermost lining plate 3 of the bottom gate, and the lining plate 2 of the coke tank discharge port. The boss 12 is provided with a 45° bevel relative to the lining plate 2 of the coke tank discharge port. A gap A is formed between the sealing steel ring 8 and the platform of the outermost lining plate 3 of the bottom gate, a gap B is formed between the sealing steel ring 8 and the 45° bevel of the boss 12, a gap C is formed between the outermost lining plate 3 of the bottom gate and the lining plate 2 of the coke tank discharge port, and a gap D is formed between the sealing steel ring 8 and the lining plate 2 of the coke tank discharge port. The size of gap B and gap C is ≤10mm, and the gap A and gap D are ≤20mm. This mechanism can quickly decelerate the gas, greatly reduce the inflow of gas, and ensure the long-term and stable use of the coke tank.

[0030] The lower edge of the liner 2 at the coke tank discharge port is vertically connected with a sealing protrusion 14, and the lower edge of the sealing protrusion 14 is rounded. This mechanism strengthens the lower end of the liner 2 at the coke tank discharge port to reduce damage caused by impact on the lower part of the liner when coke is discharged.

[0031] The material of the sealing steel ring 8 is heat-resistant steel. After the coke tank discharge port lining plate 2 and the outermost ring lining plate 3 of the bottom gate are installed, the gap size formed by the two adjacent parts is measured. Under the condition of ensuring the size of gap A, gap B, gap C, and gap D, a suitable steel rod is selected for welding with the inclined plate 6. Generally, three specifications of steel rods can be carried for on-site installation.

[0032] A heat-resistant sealing ring 13 is installed on the lower surface of the flat plate 5. The heat-resistant sealing ring 13 is made of refractory fiber. The heat-resistant sealing ring 13 is connected to the mounting seat 15 on the lower surface of the flat plate 5 by bolts. The heat-resistant sealing ring 13 relies on the extrusion force of the outermost ring lining plate 3 of the bottom gate to deform it for sealing. This seal can reduce the amount of air intake at one time. The inclined plate 6 has a square opening in the circumferential direction for installing the lining plate 2 of the coke tank discharge port. A heat-resistant fiber layer 9 is laid between the inclined plate 6 and the lining plate 2 of the coke tank discharge port for heat insulation. When the heat-resistant fiber layer 9 is partially ablated, coke powder will flow from the square opening into the cavity of the annular groove body 11, so that the coke powder directly falls on the outermost ring lining plate 3 of the bottom gate. When the bottom gate 4 of the coke tank is opened, the coke powder directly falls into the dry quenching furnace. The lower edge of the inclined plate 6 and the heat-resistant fiber layer 9 is located at the upper edge of the sealing steel ring 8. To ensure strength, several rib plates 10 are provided between the inclined plate 6 and the vertical plate 7.

[0033] The installation position of the sealing steel ring 8 in the circumferential direction is adjusted according to the spacing between it and the adjacent structure, and the diameters of various parts of the sealing steel ring 8 are the same or different.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a coke drum discharge port of a dry coke quenching device, comprising a coke drum discharge port lining plate and an outermost ring lining plate of a bottom gate, wherein the outermost ring lining plate of the bottom gate is located at the upper edge of the bottom gate of the coke drum, and the coke drum discharge port lining plate is located on the bottom side wall of the coke drum body, characterized in that: The outer side of the coke drum discharge port lining is composed of a vertical plate, an inclined plate and a flat plate to form an annular trough body with an opening at the bottom. The bottom of the annular trough body corresponds to the position of the outermost lining plate of the bottom gate. A heat-resistant sealing ring is provided between the flat plate and the outermost lining plate of the bottom gate. The outermost lining plate of the bottom gate is provided with an upward boss corresponding to the opening of the annular trough body. A sealing steel ring is provided between the boss and the lower edge of the lining plate of the coke drum discharge port.

2. A sealing structure for a discharge port of a dry coke quenching tank according to claim 1, characterized in that: A labyrinth sealing structure is formed between the sealing steel ring, the outermost lining plate of the bottom gate and the lining plate of the coke drum discharge port. The boss is provided with a 45° bevel relative to the direction of the lining plate of the coke drum discharge port. A gap A is formed between the sealing steel ring and the outermost lining plate platform of the bottom gate, a gap B is formed between the sealing steel ring and the 45° bevel edge of the boss, a gap C is formed between the outermost lining plate of the bottom gate and the lining plate of the coke drum discharge port, and a gap D is formed between the sealing steel ring and the lining plate of the coke drum discharge port.

3. A sealing structure for a discharge port of a dry coke quenching tank according to claim 1, characterized in that: The lower edge of the lining plate of the coke tank discharge port is vertically connected with a sealing protrusion, and the lower edge of the sealing protrusion is rounded.

4. A sealing structure for a discharge port of a dry coke quenching tank according to claim 2, characterized in that: The sizes of the gap B and the gap C are ≤10 mm, and the sizes of the gap A and the gap D are ≤20 mm.

5. The sealing structure for the discharge port of a dry coke quenching tank according to claim 1, characterized in that: A heat-resistant sealing ring is installed on the lower surface of the flat plate. The material of the heat-resistant sealing ring is refractory fiber. The heat-resistant sealing ring is connected to the mounting seat on the lower surface of the flat plate by bolts.

6. A sealing structure for a discharge port of a dry coke quenching tank according to claim 1, characterized in that: The inclined plate is provided with a square opening in the circumferential direction for installing the lining plate of the coke drum discharge port. A heat-resistant fiber layer is laid between the inclined plate and the lining plate of the coke drum discharge port for heat insulation.

7. A sealing structure for a discharge port of a dry coke quenching tank according to claim 1, characterized in that: The lower edges of the inclined plate and the heat-resistant fiber layer are located on the upper edge of the sealing steel ring.

8. The sealing structure for the discharge port of a dry coke quenching tank according to claim 1, characterized in that: A plurality of rib plates are arranged between the inclined plate and the vertical plate.

9. A sealing structure for a discharge port of a dry coke quenching tank according to claim 1, characterized in that: The diameters of the sealing steel rings of various parts in the circumferential direction are the same or different.

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