Dry quenching tank lining plate structure and dry quenching tank comprising same

Abstract

The invention discloses a dry quenching tank lining plate structure and a dry quenching tank comprising the same, and belongs to the technical field of coking. The lining plate is of a trapezoidal structure and comprises a lining plate body, the lining plate body is provided with an inclined surface and a bottom surface, a groove is formed in the inclined surface, and a plurality of mounting holes are formed in the plate body corresponding to the groove, so that the lining plate can be mounted and fixed at the bottom of the dry quenching tank; a step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body; according to the lining plate, a step with a certain height is formed between the lining plate and the bottom face, the rigidity of the lower end of the lining plate is effectively improved, the lining plate is prevented from tilting and deforming, the groove is formed in the surface of the lining plate, the groove is filled with the high-temperature-resistant, wear-resistant and high-temperature-resistant castable, and therefore the lining plate is not prone to deformation, the service life of the lining plate is prolonged, and the service life of the lining plate is prolonged. The wear resistance of the lining plate is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coking, and more specifically, relates to a coke dry quenching tank lining structure and a coke dry quenching tank comprising the lining structure. Background Art

[0002] Since the production of wet quenched coke by coking enterprises is not conducive to environmental protection, they have gradually switched to the production of dry quenched coke in recent years. The production of dry quenched coke requires the use of large open dry quenching coke tanks for the transfer and lifting of coke between the coke oven and the dry quenching furnace.

[0003] After the coke is melted, it forms sticky green coke, which adheres to the bottom of the coke drum and hardens after contact with the air. When the bottom gate at the bottom of the coke drum is opened and closed, the lower end of the liner at the bottom of the coke drum is easily lifted up, causing the liner to deform and affecting the smoothness of the material flow. Long-term wear and weathering also cause the liner to easily oxidize and fail.

[0004] In addition, the coke drum carries coke during use. On the one hand, the temperature of the coke is between 900℃ and 1050℃, which requires high strength for high-temperature use of the coke drum. On the other hand, a full tank of red coke weighs about 50 tons, and the lower end of the coke drum is a concentrated area for falling coke. The coke drum is greatly worn during the falling of the coke, which puts higher requirements on the load-bearing capacity and structural strength of the bottom of the coke drum.

[0005] Patent CN212741227U discloses a dry quenching coke tank truck, which belongs to the coking field, and includes a tank body, an inner lining plate is arranged close to the inner wall of the tank body, and a bottom gate is arranged at the bottom of the tank body; a discharge port is opened at the bottom of the inner lining plate, and a material storage structure is arranged on the edge of the inner lining plate with the discharge port toward the discharge port; when the bottom gate is in a closed state, the plate surface of the bottom gate close to the inner cavity of the tank body abuts against the material storage structure, and the discharge port is in a sealed state; when the bottom gate is in an open state, the bottom gate is separated from the material storage structure, and the discharge port is in an open state.

[0006] After searching, patent CN112824499A discloses an anti-falling quick-install wear-resistant composite coke tank liner and a dry quenching coke tank. The liner is composed of a support plate and a wear-resistant composite layer; the support plate is located outside the wear-resistant composite layer, and the outer side of the support plate is provided with a liner fixing mechanism for fixing the liner to the dry quenching coke tank. The dry quenching coke tank includes a tank body, a bottom gate, a liner fixing mechanism, and the above-mentioned liner. The tank body is provided with a straight rib plate and a reinforcement ring. The reinforcement ring is arranged along the circumference of the tank body. The straight rib plate and the reinforcement ring intersect to form a plurality of brackets. The liner fixing mechanism includes a locker, a lock hook frame, a movable lock hook, and a lower lock plate. The liner is installed on the corresponding bracket. The lock hook frame is connected with the movable lock hook in a corresponding interlocking manner. The lower lock plate extends downward from the liner and is limitedly supported on the reinforcement ring.

[0007] Patent CN109486501A discloses a circular dry coke quenching coke drum composite lining, including several coke drum bottom linings, cone section linings and cylindrical section linings, each lining is provided with several longitudinal and transverse ribs on the inner surface, so that several grooves (332) are formed on the inner surface, each lining is provided with a through hole connected to the coke drum or a mounting column connected to the coke drum is provided on the back of the lining, and a nano ceramic layer is provided on the inner surface of the lining.

[0008] However, in the above-mentioned coke drum, the bottom structure strength of the coke drum is low, and after long-term use, the coke drum support is prone to collapse. Summary of the invention

[0009] 1. Problems to be solved

[0010] In view of the problem that the bottom lining of the existing dry coke quenching tank is prone to deformation, the first object of the present invention is to provide a dry coke quenching tank lining structure, the lining and the bottom surface form a step with a certain height, and a groove is provided to fill the casting material to prevent the lining from warping and deformation;

[0011] Another object of the present invention is to provide a dry quenching coke drum including the lining structure, wherein the bottom of the coke drum adopts a lining with higher high-temperature rigidity, which effectively improves the structural strength of the lining at the bottom of the coke drum and ensures smooth material flow.

[0012] 2. Technical solution

[0013] To solve the above problems, the present invention adopts the following technical solutions.

[0014] The present invention discloses a dry coke quenching tank lining plate structure, which comprises a lining plate body, wherein the lining plate body has an inclined surface and a bottom surface, a groove is provided on the inclined surface, and a plurality of mounting holes are provided on the plate body corresponding to the groove, so that the lining plate can be mounted and fixed on the bottom of the dry coke quenching tank;

[0015] A step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body; the step surface can not only enhance the strength of the lining plate body, but also the step surface is in contact with the red-hot coke, and the contact area is increased, thereby improving the thermal conductivity, and the lower edge of the lining plate is not easily burned and deformed in a short time, thereby extending the service life of the lining plate;

[0016] And a high temperature resistant castable (at least above 1200°C) filled in the groove, the high temperature resistant castable is flush with the inclined surface, and the design of the flush structure can reduce the resistance to coke discharge. After a large number of experiments, it was found that the falling red-hot coke has a greater impact on the lining, causing greater wear of the lining. The high temperature resistant castable can withstand the impact and has good wear resistance. In some cases, it can be repaired to extend its service life.

[0017] The high temperature resistant castables include but are not limited to silicate plus bone screw wear-resistant and high temperature resistant cement and water glass refractory castables.

[0018] The present invention also discloses a dry coke quenching tank including the above-mentioned liner structure, including a keel bracket, the liner is fixed on the keel bracket, and the keel bracket includes from top to bottom: two inclined sections and a vertical bracket connecting the inclined sections, and from top to bottom, a first inclined bracket, a vertical bracket, and a second inclined bracket. The first inclined bracket is provided with a first liner structure, the vertical bracket is provided with a second liner structure, and the second inclined bracket is provided with a third liner structure.

[0019] Furthermore, the angle between the second inclined bracket and the horizontal plane is 30°-45°.

[0020] The third lining plate comprises a lining plate body, wherein the lining plate body has an inclined surface and a bottom surface, a groove is provided on the inclined surface, and a plurality of mounting holes are provided on the plate body corresponding to the groove, so that the lining plate can be mounted and fixed on the bottom of the dry coke quenching tank.

[0021] A step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body;

[0022] And a high temperature resistant castable filled in the groove, the high temperature resistant castable is flush with the inclined surface, the height H of the step surface is 40-50mm, and a stopper is provided below the bottom surface corresponding to the step surface, and the stopper enables the liner plate body to overlap on the bracket at the bottom of the dry quenching tank.

[0023] Furthermore, in order to ensure the airtightness of the coke drum, the lining plates are filled with thermal insulation materials, and the thermal insulation materials are selected to be thermal insulation materials with a heat resistance exceeding 1000°C, such as zirconium-containing ceramic fiber loose wool, aluminum silicate or rock wool.

[0024] 3. Beneficial effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The lining plate of the dry coke quenching tank of the present invention has a trapezoidal structure at the lower end. The lower end of the lining plate is provided with a section perpendicular to the bottom surface, so that the lining plate and the bottom surface form a step with a certain height, which effectively improves the rigidity of the lower end of the lining plate and prevents the lining plate from warping and deformation. A groove is provided on the surface of the lining plate, and the groove is filled with high-temperature wear-resistant and high-temperature castable material, which effectively improves the wear resistance of the lining plate and prevents the surface of the lining plate from deformation.

[0027] (2) The lining plate of the dry coke quenching tank of the present invention is a split lining plate, and the smaller the lining plate, the higher the strength;

[0028] (3) The liner of the dry quenching tank of the present invention is fixed to the keel bracket by a fixing member to prevent the liner from falling off;

[0029] (4) A dry quenching coke tank of the present invention has a trapezoidal structure split lining plate with higher high temperature rigidity at the bottom, which effectively improves the structural strength of the lining plate at the bottom of the coke tank and ensures smooth material flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0031] Figure 1 It is a schematic diagram of the overall structure of the dry coke quenching tank of the present invention;

[0032] Figure 2 It is a schematic diagram of the side structure of the dry coke quenching tank of the present invention;

[0033] Figure 3 It is a schematic diagram of the fixing structure of the first lining plate of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the liner A of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the liner B of the present invention;

[0036] Figure 6 This is a schematic diagram of the second lining plate fixing structure of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the liner C of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the liner D of the present invention;

[0039] Fig. 9 This is a schematic diagram of the structure of the liner E in Example 1 of the present invention;

[0040] Fig.10 This is a schematic diagram of the groove structure of the liner E in Example 1 of the present invention;

[0041] Fig.11 This is a schematic diagram of the structure of the liner E after being filled with castable material according to Example 1 of the present invention;

[0042] In the figure: 1. first inclined bracket; 11. first lining plate; 2. vertical bracket; 21. lining plate A; 22. lining plate B; 23. supporting ear; 24. clamping plate; 3. second inclined bracket; 31. lining plate C; 32. lining plate D; 33. lining plate E; 331. lining plate body; 332. groove; 4. keel bracket. DETAILED DESCRIPTION

[0043] The following detailed description of the present invention and example embodiments may be better understood in conjunction with the accompanying drawings, in which elements and features of the present invention are identified by reference numerals.

[0044] Example

[0045] A dry quenching tank, such as Figure 1-2 As shown, it includes a keel bracket 4, the lining plate is fixed on the keel bracket 4, and the keel bracket 4 includes from top to bottom: two inclined sections and a vertical bracket 2 connecting the inclined sections, wherein the first inclined bracket 1 is provided with a first lining plate structure, the vertical bracket 2 is provided with a second lining plate structure, and the second inclined bracket 3 is provided with a third lining plate structure. The angle between the second inclined bracket 3 and the horizontal plane is 36°.

[0046] The first lining plate structure is as follows Figure 3-4 As shown, it includes a first lining plate 11, and a downward hook is provided on the back of the first lining plate 11. The first lining plate 11 is mounted on the keel bracket 4 through the hook, and then a threaded hole is opened on the upper end of the surface of the first lining plate 11, and the first lining plate 11 is fixed to the keel bracket 4 by screws.

[0047] The second lining plate includes lining plate A21 and lining plate B22, and the lining plate A21 and lining plate B22 are split lining plates. The second lining plate below 2 / 3 of the height of the coke tank adopts lining plate B22, and the lining plate B22 is below lining plate A21.

[0048] Specifically, the liner A 21 is a split liner, that is, the liner A 21 is evenly divided into two parts in the horizontal direction at 1 / 2 height of the first liner 11.

[0049] The lining plate C 31 is divided into two parts in the vertical direction at 1 / 2 width of the lining plate A21.

[0050] The second lining plate has a burr structure at its edge, and is overlapped on the keel bracket 4 through the burr structure, wherein outward grooves are respectively opened along the edge on the back side of the second lining plate, and the grooves are overlapped on the keel bracket 4 of the coke tank.

[0051] like Figure 6 As shown, a supporting ear 23 is provided on the back of the second lining plate, a clamping plate 24 is fixed on the supporting ear 23, a through hole is provided on the clamping plate 24, and a counter-support screw is passed through the through hole to fix the lining plate.

[0052] like Figure 7-11As shown, the third lining plate includes lining plate C 31, lining plate D 32 and lining plate E 33, the lining plate D 32 is located above lining plate E 33, the lining plate E 33 is a split lining plate, the area of ​​the upper surface of which is divided by 1 / 2 of the horizontal width of lining plate D 32, and each lining plate E 33 is provided with a cut surface perpendicular to the bottom surface at the lower end, so that the lining plate E 33 and the bottom surface form a step with a certain height. The height of the step is 40 mm.

[0053] The third lining plate structure: The third lining plate includes lining plate C 31, lining plate D 32 and lining plate E 33. The lining plate C 31 and lining plate D 32 are located above lining plate E 33. The lining plate E 33 is a split lining plate, and the area of ​​its upper surface is divided by 1 / 2 of the horizontal width of lining plate D 32, such as Figure 9-11 As shown, each liner E 33 includes a liner body 331, wherein the liner body 331 has an inclined surface and a bottom surface, a groove 332 is provided on the inclined surface, and a plurality of mounting holes are provided on the plate body corresponding to the groove 332, so that it can be mounted and fixed on the bottom of the dry coke quenching tank.

[0054] A step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body 331; by increasing the volume of the lining plate E 33, the thermal conductivity is improved, which is conducive to absorbing heat, and the lower edge of the lining plate is not easily burned and deformed in a short time.

[0055] And the high temperature resistant casting material is filled in the groove 332, and the high temperature resistant casting material is flush with the inclined surface. The height of the step is preferably 40-50 mm.

[0056] Coke is divided into raw coke and cooked coke. Raw coke is formed after coke is melted. Green coke has high viscosity. The tar in the raw coke is in a semi-molten state and adheres to the bottom of the coke drum. It hardens after contacting the air. During the unloading process, the bottom gate at the bottom of the coke drum opens and closes, which causes the lower end of the third lining to be easily lifted up, and the lower end of the lining is deformed, affecting the smoothness of the material flow. The lining in the prior art generally adopts a 30mm thick metal plate. The obtuse angle at the lower end of the metal plate is more susceptible to oxidation and failure due to the opening and closing of the unloading port and weathering. In addition, due to the thin thickness of the lining, the lower edge of the lining is easily burned red and deformed under high temperature conditions of 1000°C. Therefore, the present application cuts the sharp corner part of the lower end of the lining to form a step with a height. When the hardened raw coke is pushed to the lower end of the lining, the step has a larger surface area and the height is greater than the thickness of the existing lining, so it is not easy to be lifted up, resulting in deformation of the lower end. A split liner is used to divide the third liner into liner D 32 and liner E 33 which are distributed vertically. The smaller the liner is, the higher the strength is. To further improve the rigidity, the liner E 33 is a liner with a smaller area obtained by dividing the liner D 32 at 1 / 2 of the horizontal width.

[0057] However, the wear resistance of the above liner is limited. In actual production, it is found that since the lower end of the coke tank is a concentrated area for falling materials, the coke tank is greatly worn during the falling process of the coke materials. In order to improve the wear resistance, the liner E 33 is designed to have a groove 332, and the groove 332 is filled with high-temperature wear-resistant and high-temperature castables. The high-temperature castables are preferably silicate and bone nail wear-resistant and high-temperature cement. On the one hand, the wear resistance of the lower end of the liner is improved, and on the other hand, the volume of the liner is increased, the thermal conductivity is improved, and the lower edge of the liner is not easy to be burned and deformed in a short time.

[0058] It is worth noting that the high-temperature wear-resistant and high-temperature resistant castable filled in the groove 332 only serves as a wear-resistant filling, but its heat conduction efficiency is low, resulting in the liner E 33 being in a high-temperature state for a long time after blanking. If the heat cannot be conducted quickly, the liner E 33, especially the lower end of the liner E 33, is prone to deformation due to the high temperature. Therefore, the present application further cuts the lower end of the liner E 33 to form a step surface with a certain height. The step surface has a higher heat conduction efficiency, conducts energy in time, and reduces the degree of deformation of the liner E 33.

[0059] Furthermore, in order to improve the structural rigidity of the support, a vertical plate perpendicular to the inner wall of the coke tank is provided between the liner plates E 33, and the vertical plate is perpendicular to the bottom surface, thereby improving the structural rigidity of the liner plates E 33.

[0060] Fixing method: The lining plate is fixed on the keel bracket 4 by a fixing piece. The fixing method can be:

[0061] a. Open threaded holes on the surface of the lining plate and fix the lining plate to the keel bracket with screws;

[0062] b. A downward hook is provided at the bottom of the back of the lining board, and the lining board is mounted on the keel bracket 4 through the hook. Then, a threaded hole is opened on the upper end of the lining board surface, and the lining board is fixed to the keel bracket with screws;

[0063] c. Open threaded holes on the supporting surface of the liner and fix the liner to the coke tank with screws;

[0064] d. A supporting ear 23 is provided on the back of the lining plate, and a clamping plate 24 is fixed on the coke tank. The supporting ear 23 is fixed on the clamping plate 24. A through hole is provided on the clamping plate 24, and an anti-support screw is passed through the through hole.

[0065] Liner material: In order to improve the heat resistance of the coke drum, the liner is made of an alloy with a heat resistance of more than 1100°C. The melting point of the metal material is 1350-1450°C. In order to increase the melting point of the material, an alloy material with a higher temperature is selected. Preferably, it is an Fe-based WNiMo alloy, which has high rigidity, low plasticity, high thermal strength, and can not deform at temperatures above 1100°C.

[0066] Furthermore, for liners with higher wear rates, especially liner E33, high-temperature alloys are selected. The existing pure austenitic stainless steel has good high-temperature performance, but poor strength and wear resistance. Therefore, this application selects austenitic alloy heat-resistant steel Mn13 as the material of liner E33, which has higher thermal conductivity and wear resistance, and good antioxidant properties. After cooling, no oxide scale will be formed on the surface, avoiding oxidation failure caused by repeated formation of oxide scale on the liner surface after repeated use.

[0067] In addition, during the assembly of the coke drum, gaps exist between the lining plates. To improve the airtightness of the coke drum, thermal insulation materials are filled in the gaps between the lining plates. The thermal insulation materials are selected to have a heat resistance exceeding 1100°C, such as zirconium-containing ceramic fiber loose wool, aluminum silicate or rock wool.

[0068] Inclination angle: The angle between the second inclined bracket 3 and the horizontal plane is 30-45°. In the prior art, during the discharge of coke, due to the heavy weight and high temperature of coke, the liner is easily deformed during the flushing process because the third liner is located at the discharge port. The middle of the third liner is sunken, and the edge is warped, which will hinder the discharge of the material, causing the coke to accumulate in the sunken area and unable to discharge the material. In the long run, the coke tank is blocked.

[0069] Therefore, this application selects Fe-based high-temperature wear-resistant alloy as the material of the lining plate. Compared with the existing high-temperature alloys with high plasticity, poor rigidity and easy deformation, this application selects Fe-based high-temperature wear-resistant alloy with higher high-temperature rigidity. During use, the lining plate does not deform, the surface is smooth, and the material slides smoothly.

[0070] Furthermore, increasing the inclination angle of the third lining plate is beneficial to increasing the material sliding speed and reducing the accumulation of coke. The present application sets the inclination angle of the third lining plate to 30° to 45°. Preferably, it is 36°, 37°, 38°, 39°, 40°, 41°, or 42°.

[0071] In this embodiment, the liner E 33 is as follows Figure 8 As shown, it includes a lining plate body 331, the lining plate body 331 has an inclined surface and a bottom surface, a groove 332 is opened on the inclined surface, and a plurality of mounting holes are opened on the plate body corresponding to the groove 332, so that it can be installed and fixed on the bottom of the dry coke quenching tank, and a step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body; and a silicate bone nail wear-resistant and high-temperature cement high-temperature resistant castable filled in the groove, the high-temperature resistant castable is flush with the inclined surface, the height H of the step surface is 40 mm, and a stopper is arranged below the bottom surface corresponding to the step surface, and the stopper enables the lining plate body to overlap the bracket at the bottom of the dry coke quenching tank.

[0072] Threaded holes are provided on liner C 31 and liner D 32, and liner C 31 and liner D 32 are fixed to the coke tank by bolts. Threaded holes are provided on the supporting surface of liner E 33, and liner E 33 is fixed to the coke tank by screws.

[0073] A vertical plate perpendicular to the inner wall of the coke tank is provided between the lining plates E33, and the vertical plate is perpendicular to the bottom surface, thereby improving the structural rigidity of the lining plates E33.

[0074] The lining plate structures are filled with heat-insulating materials, and the heat-insulating materials are aluminum silicate heat-insulating materials with a heat resistance exceeding 1000°C.

Claims

1. A dry coke quenching tank lining structure, characterized in that: It comprises a lining plate body (331), wherein the lining plate body (331) has an inclined surface and a bottom surface, a groove (332) is provided on the inclined surface, and a plurality of mounting holes are provided on the lining plate body (331) corresponding to the groove (332), so that the lining plate body (331) can be mounted and fixed on the bottom of the dry coke quenching tank; A step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body (331); And a high temperature resistant casting material is filled in the groove (332), wherein the high temperature resistant casting material is flush with the inclined surface.

2. The dry quenching tank lining structure according to claim 1, characterized in that: The height H of the step surface is 40-50 mm.

3. The dry quenching tank lining structure according to claim 2, characterized in that: A stopper is provided below the bottom surface corresponding to the step surface, and the stopper enables the lining plate body (331) to overlap the keel bracket (4) of the dry coke quenching tank.

4. The dry quenching tank lining structure according to claim 3 is characterized in that: The high temperature resistant castable includes one or more of silicate bone screw wear-resistant and high temperature resistant cement and water glass refractory castable.

5. A dry coke quenching tank, comprising a keel support (4), wherein the keel support (4) comprises, from top to bottom: First inclined bracket (1): a first lining plate structure is provided on the first inclined bracket (1); Vertical support (2): a second lining plate structure is provided on the vertical support (2); Second inclined bracket (3): The second inclined bracket (3) is provided with a third lining plate structure, characterized in that: The third lining plate structure comprises a lining plate body (331), wherein the lining plate body (331) has an inclined surface and a bottom surface, a groove (332) is provided on the inclined surface, and a plurality of mounting holes are provided on the plate body corresponding to the groove (332), so that the lining plate body can be mounted and fixed on the bottom of the dry coke quenching tank; A step surface is formed between the lower end of the inclined surface and the bottom surface of the lining plate body (331); And a high temperature resistant casting material is filled in the groove (332), wherein the high temperature resistant casting material is flush with the inclined surface.

6. The dry coke quenching tank according to claim 5, characterized in that: The height H of the step surface is 40-50 mm.

7. The dry coke quenching tank according to claim 6, characterized in that: A stopper is provided below the bottom surface corresponding to the step surface, and the stopper enables the lining plate body (331) to overlap the bracket at the bottom of the dry coke quenching tank.

8. The dry coke quenching tank according to claim 7, characterized in that: The high temperature resistant castable includes one or more of silicate bone screw wear-resistant and high temperature resistant cement and water glass refractory castable.

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