A dry quenching chute support formwork and a method for repairing the chute refractory

Abstract

The application discloses a dry quenching inclined channel formwork and a repairing method of the inclined channel refractory material, which comprises a first body, the first body is a hollow formwork structure, a first pre-connection plate is fixedly arranged on the first body, a second pre-connection plate is fixedly arranged above the first pre-connection plate, the first pre-connection plate is parallel to the refractory bricks at the end of each inclined channel bracket, the second pre-connection plate is parallel to the side wall of each inclined channel bracket, the first body is provided in a whole triangular structure, a prefabricated hole is fixedly arranged on the end face of the first body, the first body is fixed with the inclined channel bracket through the prefabricated hole, a positioning piece is arranged at the center position of the first body, the positioning piece is arranged between the two symmetrical first bodies, two groups of symmetrical prefabricated channel holes are fixedly arranged on the second pre-connection plate, and the prefabricated channel holes are arranged in an upper-lower interval.

Description

Technical Field

[0001] This invention relates to the field of dry quenching technology in the coking industry, and in particular to a method for repairing the support template and refractory material of the dry quenching duct. Background Technology

[0002] The dry quenching furnace is a kiln-type structure, a cylindrical, vertical masonry structure under positive pressure. From top to bottom, the furnace body consists of a pre-storage chamber, an inclined chute zone, and a cooling section. The entire dry quenching furnace is encased in an iron shell, with the inner layer constructed of different types of refractory bricks, and some areas also utilizing refractory castable materials.

[0003] The refractory bricks in the inclined section of the dry quenching furnace must bear the load of the upper masonry. During long-term dry quenching production, the temperature in the inclined section fluctuates frequently, and the circulating gas carrying coke dust subjectes this area to intense erosion and wear, making it one of the most vulnerable parts of the dry quenching furnace. The objective reason for the severe damage to the refractory materials in the inclined section is the continuous temperature fluctuation of coke, circulating gas, and refractory gas along the upward direction of the inclined section. Particularly in the lower part of the inclined section, the temperature fluctuation of the refractory gas is between 300-700℃, which causes the refractory brick masonry to crack and peel off, thus affecting the normal production of dry quenching coke.

[0004] Traditional maintenance methods require the complete removal and reconstruction of the refractory brickwork in the inclined quenching zone due to overall deformation, cracking, and displacement. This involves dismantling and rebuilding all the refractory brickwork from the bottom of the inclined quenching zone to the furnace mouth. This conservative approach, involving the removal and reconstruction of the inclined quenching zone's refractory brickwork, is problematic because the inclined zone, located in the middle of the quenching furnace, bears the load of the entire upper quenching furnace structure. If the inclined quenching zone's refractory brickwork is not securely supported, the upper inner ring wall and all refractory brickwork are at risk of collapse. Therefore, while removing the inclined quenching zone's refractory brickwork, the upper structure, lacking support, must also be completely removed and rebuilt for safety reasons. This not only complicates quenching furnace maintenance but also prolongs the overall maintenance time, delays the maintenance schedule, affects normal quenching coke production, and causes significant economic losses.

[0005] Due to the special nature of dry quenching coke, dry quenching coke units generally need to be shut down for annual maintenance after one year of operation. Among them, the repair and reconstruction of the refractory brick masonry in the inclined section of the dry quenching furnace is an important maintenance item. In view of the above factors, a repair method for the inclined support formwork and inclined refractory material of dry quenching coke is specially designed. Under the condition of use, it can effectively fix the inclined bracket to be repaired, and at the same time prevent the overall deformation of the refractory material in the dry quenching furnace. Summary of the Invention

[0006] The purpose of this invention is to provide a method for repairing the formwork and refractory material of the dry quenching duct, so as to solve the problems mentioned in the background art. This invention can effectively avoid the special situation where the refractory brick masonry supporting the quenching duct area of ​​the dry quenching furnace is deformed due to long-term production, high temperature and erosion by coke and coke powder, resulting in the overall deformation of the refractory material inside the dry quenching furnace, causing the outer ring wall and corbel to crack and shift into the dry quenching furnace, thus requiring complete demolition and reconstruction.

[0007] The objective of this invention is achieved through the following technical solution: a dry quenching inclined duct support template, comprising a first body, the first body being a hollow template structure, and a first pre-connecting plate fixedly disposed on the first body, and a second pre-connecting plate fixedly disposed above the first pre-connecting plate, the first pre-connecting plate being parallel to the refractory brick at the end of each inclined duct bracket, and the second pre-connecting plate being parallel to the side wall of each inclined duct bracket.

[0008] The first body is generally arranged in a triangular structure, and a pre-made hole is fixedly opened on the end face of the first body. The first body is fixed to the inclined bracket through the pre-made hole.

[0009] A positioning element is provided at the center of the first body, and the positioning element is disposed between two symmetrical first bodies.

[0010] Furthermore, two sets of symmetrical prefabricated channel holes are fixedly provided on the second pre-connecting plate, and the prefabricated channel holes are arranged at vertical intervals.

[0011] Furthermore, the size of the first body is one-third of the overall size of the ramp corbel.

[0012] Furthermore, positioning holes are spaced apart on the inclined end face of the template structure of the first body.

[0013] Furthermore, the first body and the second body form a support template force system, and the first body and the second body are fixed at different positions on the side wall of the inclined girder.

[0014] Furthermore, wear-resistant bricks are provided inside the prefabricated channel holes, and the wear-resistant bricks are fixed in the prefabricated channel holes by the wear-resistant filler refractory. The wear-resistant bricks extend 25-35mm beyond the plane of the prefabricated channel holes.

[0015] Furthermore, the wear-resistant brick is fixed to the side wall of the ramp bracket by casting refractory, and the wear-resistant brick is embedded in the mating groove opened on the side wall of the ramp bracket, the mating groove having a depth of 25-35mm.

[0016] Furthermore, positioning holes are provided on both the inclined and straight surfaces of the second body in the force-bearing system of the first body and the second body forming the support template.

[0017] The second body is fixed at the boundary of the ramp bracket side wall.

[0018] Furthermore, the castable is a self-flowing corundum wear-resistant castable.

[0019] A method for repairing refractory materials in a dry quenching inclined coke chute includes the following steps;

[0020] The first step is to prefabricate the formwork for the dry quenching inclined duct;

[0021] Based on the structure of the dry quenching inclined section, a support template for the dry quenching inclined section is customized, and a first body and a second body are made. The first body and the second body form a force system for the support template.

[0022] The second step is to assemble the dry quenching inclined chute support template inside the furnace.

[0023] The first and second bodies are fixed to the side wall of the inclined girder to form a support template force system;

[0024] The first body, together with the first pre-connecting plate and the second pre-connecting plate, is fixed to the refractory brick wall where the inclined bracket is located and the side wall of the inclined bracket, respectively.

[0025] The third step involves fixing the first body and the second body to the side wall of the adjacent inclined bracket to form a support template force system, and fixing the support template formed by the first body and the second body to each other through positioning parts.

[0026] The first body and the second body are reinforced and fixed by steel bars connected through positioning holes;

[0027] The fourth step is to repair all displacement gaps caused by deformation and cracking of the refractory brick masonry in the inclined zone of the dry quenching furnace by grouting with castable material.

[0028] The fifth step involves using a grouting tool to pour the castable refractory into the gaps at the base of each corbel where displacement has occurred. This ensures the castable refractory and the refractory material at the base of the corbel bond well together. After curing for 48-60 hours, once the castable refractory strength of each corbel reaches the standard, the supporting formwork for each corbel is removed, thus completing the repair of the corbel bricks.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] In this invention, the first and second bodies form a support template, with the templates fixed on both sides of each bracket at the end of the bracket where displacement occurs, thus providing effective support.

[0031] This invention solves the special situation of overall deformation, cracking and displacement of refractory brick masonry in the inclined section of the dry quenching furnace by forming a support system of the first body and the second body. It breaks the conventional maintenance method that requires the complete demolition and reconstruction of refractory brick masonry in the inclined section when overall deformation, cracking and displacement occur. It has achieved success at one time and has good performance.

[0032] This invention not only meets the standards for masonry repair after the overall deformation, cracking, and displacement of the refractory brick masonry in the inclined zone of the dry quenching furnace, but also increases the output of dry quenched coke and power generation, and extends the service life of the refractory materials in the inclined zone of the dry quenching furnace. At the same time, it significantly reduces maintenance time and costs, resulting in substantial economic benefits. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0034] Figure 2 This is a schematic diagram of the planar symmetry of the present invention;

[0035] Figure 3 This is a schematic diagram of the invention having prefabricated channel holes;

[0036] Figure 4 This is a schematic diagram of the second body of the present invention;

[0037] Figure 5 This is a schematic diagram of the first body of the present invention. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Figure 1-5 As shown, a dry quenching inclined duct support template includes a first body 1, which is a hollow template structure. A first pre-connecting plate 3 is fixedly installed on the first body 1, and a second pre-connecting plate 4 is fixedly installed above the first pre-connecting plate 3. The first pre-connecting plate 3 is parallel to the refractory brick at the end of each inclined duct bracket, and the second pre-connecting plate 4 is parallel to the side wall of each inclined duct bracket.

[0040] The first body 1 is generally arranged in a triangular structure, and a pre-made hole 5 is fixedly opened on the end face of the first body 1. The first body 1 is fixed to the inclined bracket through the pre-made hole 5.

[0041] A positioning element 2 is provided at the center of the first body 1, and the positioning element 2 (which is a steel structural component) is positioned between two symmetrical first bodies 1.

[0042] In a further preferred embodiment of the present invention, two sets of symmetrical prefabricated channel holes 7 are fixedly opened on the second pre-connecting plate 4, and the prefabricated channel holes 7 are arranged at intervals between the upper and lower parts.

[0043] A further preferred embodiment of the present invention is that the size of the first body 1 is one-third of the overall size of the ramp bracket.

[0044] A further preferred embodiment of the present invention is that positioning holes 6 are spaced apart on the inclined end face of the template structure of the first body 1.

[0045] A further preferred embodiment of the present invention is that the first body 1 and the second body 1-1 form a support template force system, and the first body 1 and the second body 1-1 are fixed at different positions on the side wall of the inclined girder.

[0046] A further preferred embodiment of the present invention is that a wear-resistant brick is provided inside the prefabricated channel hole 7, and the wear-resistant brick is fixed in the prefabricated channel hole 7 by a wear-resistant filler castable, and the wear-resistant brick extends 25-35mm out of the plane of the prefabricated channel hole 7.

[0047] A further preferred embodiment of the present invention is that the wear-resistant brick is fixed to the side wall of the inclined bracket by casting refractory, and the wear-resistant brick is embedded in a mating groove opened on the side wall of the inclined bracket, the mating groove having a depth of 25-35mm.

[0048] A further preferred embodiment of the present invention is that positioning holes 6 are provided on both the inclined surface and the straight surface of the second body 1-1 in the force-bearing system of the first body 1 and the second body 1-1 forming the template support system;

[0049] The second body 1-1 is fixed at the boundary of the side wall of the ramp bracket.

[0050] A further preferred embodiment of the present invention is that the castable is a self-flowing corundum wear-resistant castable.

[0051] A method for repairing refractory materials in a dry quenching inclined coke chute includes the following steps;

[0052] The first step is to prefabricate the formwork for the dry quenching inclined duct;

[0053] Based on the structure of the dry quenching inclined section, a support template for the dry quenching inclined section is customized, and a first body 1 and a second body 1-1 are made. The first body 1 and the second body 1-1 form a force system for the support template.

[0054] The second step is to assemble the dry quenching inclined chute support template inside the furnace.

[0055] The first body 1 and the second body 1-1 are fixed to the side wall of the inclined girder to form a support template force system;

[0056] The first body 1, together with the first pre-connecting plate 3 and the second pre-connecting plate 4, is fixed to the refractory brick wall where the inclined bracket is located and the side wall of the inclined bracket, respectively.

[0057] The third step involves fixing the first body 1 and the second body 1-1 to the adjacent inclined cofferdam sidewalls to form a support template force system. At the same time, the support templates formed by the first body 1 and the second body 1-1 are fixed together by positioning parts 2.

[0058] The first body 1 and the second body 1-1 are reinforced and fixed by steel bars through positioning holes 6;

[0059] The fourth step is to repair all displacement gaps caused by deformation and cracking of the refractory brick masonry in the inclined zone of the dry quenching furnace by grouting with castable material.

[0060] The fifth step involves using a grouting tool to pour the castable refractory into the gaps at the base of each corbel where displacement has occurred. This ensures the castable refractory and the refractory material at the base of the corbel bond well together. After curing for 48-60 hours, once the castable refractory strength of each corbel reaches the standard, the supporting formwork for each corbel is removed, thus completing the repair of the corbel bricks. Specific Implementation Example 1:

[0062] A method for repairing refractory materials in a dry quenching inclined coke chute includes the following steps;

[0063] The first step is to prefabricate the formwork for the dry quenching inclined duct;

[0064] Based on the structure of the dry quenching inclined section, a custom dry quenching inclined support template was made to construct the first body 1.

[0065] The second step is to assemble the dry quenching inclined chute support template inside the furnace.

[0066] The first body 1 is fixed to the side wall of the ramp bracket;

[0067] The first body 1, together with the first pre-connecting plate 3 and the second pre-connecting plate 4, is fixed to the refractory brick wall where the inclined bracket is located and the side wall of the inclined bracket, respectively.

[0068] The third step is to fix the first body 1 on the side wall of the adjacent ramp brackets, and fix the first body 1 to each other through the positioning part 2.

[0069] The fourth step is to repair all displacement gaps caused by deformation and cracking of the refractory brick masonry in the inclined zone of the dry quenching furnace by grouting with castable material.

[0070] The fifth step involves using a grouting tool to pour the castable refractory into the gaps at the base of each corbel where displacement has occurred. This ensures the castable refractory and the refractory material at the base of the corbel bond well together. After curing for 48-60 hours, once the castable refractory strength of each corbel reaches the standard, the supporting formwork for each corbel is removed, thus completing the repair of the corbel bricks. Specific Implementation Example 2:

[0072] A method for repairing refractory materials in a dry quenching inclined coke chute includes the following steps;

[0073] The first step is to prefabricate the formwork for the dry quenching inclined duct;

[0074] Based on the structure of the dry quenching inclined section, a support template for the dry quenching inclined section is customized, and a first body 1 and a second body 1-1 are made. The first body 1 and the second body 1-1 form a force system for the support template.

[0075] The second step is to assemble the dry quenching inclined chute support template inside the furnace.

[0076] The first body 1 and the second body 1-1 are fixed to the side wall of the inclined girder to form a support template force system;

[0077] The first body 1, together with the first pre-connecting plate 3 and the second pre-connecting plate 4, is fixed to the refractory brick wall where the inclined bracket is located and the side wall of the inclined bracket, respectively.

[0078] Wear-resistant bricks are installed in the prefabricated channel hole 7 on the second pre-connecting plate 4. The wear-resistant bricks are fixed in the prefabricated channel hole 7 by filling with castable material and extend 25-35mm out of the plane of the prefabricated channel hole 7.

[0079] The wear-resistant brick is fixed to the side wall of the inclined bracket by casting refractory. The wear-resistant brick is embedded in the mating groove (manually excavated mating groove channel) opened on the side wall of the inclined bracket. The depth of the mating groove is 25-35mm.

[0080] The third step involves fixing the first body 1 and the second body 1-1 to the adjacent inclined cofferdam sidewalls to form a support template force system. At the same time, the support templates formed by the first body 1 and the second body 1-1 are fixed together by positioning parts 2.

[0081] The first body 1 and the second body 1-1 are reinforced and fixed by steel bars through positioning holes 6;

[0082] The fourth step is to repair all displacement gaps caused by deformation and cracking of the refractory brick masonry in the inclined zone of the dry quenching furnace by grouting with castable material.

[0083] The fifth step involves using a grouting tool to pour the castable refractory into the gaps at the base of each corbel where displacement has occurred. This ensures the castable refractory and the refractory material at the base of the corbel bond well together. After curing for 48-60 hours, once the castable refractory strength of each corbel reaches the standard, the supporting formwork for each corbel is removed, thus completing the repair of the corbel bricks.

[0084] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dry quenching inclined duct support template, characterized in that: Includes a first body (1), the first body (1) is a hollow template structure, and a first pre-connecting plate (3) is fixedly installed on the first body (1), and a second pre-connecting plate (4) is fixedly installed above the first pre-connecting plate (3). The first pre-connecting plate (3) is parallel to the refractory brick at the end of each inclined bracket, and the second pre-connecting plate (4) is parallel to the side wall of each inclined bracket. The first body (1) is generally arranged in a triangular structure, and a pre-made hole (5) is fixedly opened on the end face of the first body (1). The first body (1) is fixed to the inclined bracket through the pre-made hole (5). A positioning element (2) is provided at the center of the first body (1), and the positioning element (2) is provided between two symmetrical first bodies (1).

2. The dry quenching inclined duct support formwork according to claim 1, characterized in that: The second pre-connecting plate (4) is fixedly provided with two sets of symmetrical prefabricated channel holes (7), which are arranged at intervals.

3. The dry quenching inclined duct support formwork according to claim 2, characterized in that: The size of the first body (1) is one-third of the total size of the ramp.

4. The dry quenching inclined duct support formwork according to claim 3, characterized in that: Positioning holes (6) are spaced apart on the inclined end face of the template structure of the first body (1).

5. The dry quenching inclined duct support formwork according to claim 4, characterized in that: Wear-resistant bricks are provided inside the prefabricated channel hole (7). The wear-resistant bricks are filled with castable material and fixed in the prefabricated channel hole (7). The wear-resistant bricks extend 25-35mm out of the plane of the prefabricated channel hole (7).

6. The dry quenching inclined duct support formwork according to claim 5, characterized in that: The wear-resistant brick is fixed to the side wall of the ramp bracket by casting refractory. The wear-resistant brick is embedded in the mating groove opened on the side wall of the ramp bracket, and the mating groove has a depth of 25-35mm.

7. The dry quenching inclined duct support formwork according to claim 6, characterized in that: The castable is a self-flowing corundum wear-resistant castable.

8. A method for repairing a dry quenching inclined duct support formwork according to any one of claims 1-7, characterized in that: Includes the following steps; The first step is to prefabricate the formwork for the dry quenching inclined duct; Based on the structure of the dry quenching inclined section, a support template for the dry quenching inclined section is customized, and a first body (1) is made. The two first bodies (1) form a support template force system. The second step is to assemble the dry quenching inclined chute support template inside the furnace. The first body (1) is fixed to the side wall of the inclined girder to form the support template force system; The first body (1), together with the first pre-connecting plate (3) and the second pre-connecting plate (4), are respectively fixed to the refractory brick wall where the inclined bracket is located and the side wall of the inclined bracket; The third step is to fix the first body (1) on the side wall of the adjacent inclined bracket to form the support template force system, and at the same time, the support templates formed by the first body (1) are fixed to each other by positioning parts (2); The first body (1) is reinforced and fixed by steel bars through positioning holes (6); The fourth step is to repair all displacement gaps caused by deformation and cracking of the refractory brick masonry in the inclined zone of the dry quenching furnace by grouting with castable material. The fifth step involves using a grouting tool to pour the castable refractory into the gaps at the base of each corbel where displacement has occurred. This ensures the castable refractory and the refractory material at the base of the corbel bond well together. After curing for 48-60 hours, once the castable refractory strength of each corbel reaches the standard, the supporting formwork for each corbel is removed, thus completing the repair of the corbel bricks.

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