A bracket structure for the chute area of ​​a dry quenching coke oven

Abstract

The present invention relates to a corbel structure of a chute area of ​​a dry quenching coke oven, wherein the corbel structure is constructed by masonry of multiple layers of corbel bricks; a plurality of support members are arranged between two adjacent layers of corbel bricks, wherein the support members are hard support members, the thickness of which is the same as the thickness of the mortar joints, the top surface of the support members is in direct contact with the upper layer of corbel bricks, and the bottom surface of the support members is in direct contact with the lower layer of corbel bricks. The present invention effectively prevents the sinking of an annular air duct and the cracking of a chute partition wall caused by deformation of the corbel mortar joints and inaccurate control of the corbel elevation, thereby improving the masonry quality and service life of the dry quenching coke oven.

Description

Technical Field

[0001] The invention relates to the technical field of dry quenching coke ovens, and in particular to a bracket structure in a chute area of ​​a dry quenching coke oven. Background Art

[0002] Dry quenching of coke has the functions of energy saving, environmental protection and improving the quality of coke, and has been widely used in recent years. The dry quenching coke oven is the key equipment of the dry quenching technology. It includes a pre-storage area, an annular air duct area, a ramp area and a cooling area from top to bottom. Among them, the bracket of the ramp area 1 is built by multi-layer bracket bricks 2 (such as Figure 1 The bracket is an important structure that supports the inner ring wall of the CDQ oven. In actual production, the bracket is easy to wear, crack, or even collapse due to the heavy load, frequent operating temperature fluctuations, and long-term erosion by the high-temperature coke and high-temperature circulating airflow containing coke powder in the CDQ oven. It is the bottleneck that determines the life of the CDQ oven refractory. In the current production process, the bracket needs to be frequently inspected, which greatly reduces the production efficiency of CDQ and increases the production cost.

[0003] The life of the chute corbel is related to the structure of the corbel, the selection of refractory materials, the quality of masonry, and the production operation. In recent years, there have been many attempts to extend the service life of the corbel by improving the quality of masonry. For example, Chinese patent applications with publication numbers CN106833685A, CN 106833684A, and CN 106833686A respectively record several CDQ corbel structures, which adopt a method of further advancing the corbel face brick structure or wrapping the castable on the outside of the corbel to avoid the fracture of the corbel bricks caused by the scouring of the mortar joints by the airflow during the production process. Chinese patent applications with publication numbers CN 101928575A, CN107129814A, and CN 101948697A respectively record the control method of masonry in the chute area of ​​the CDQ oven, which improves the masonry quality of the chute area by controlling the elevation, flatness, central axis, mortar fullness, and supporting the arc arch tire of the corbel.

[0004] During the construction and production process, it was found that since the refractory mud used for the masonry of the CDQ coke oven is generally thin, it is difficult to control the elevation through the mortar joints; in addition, since the moisture in the mortar joints between the refractory bricks evaporates slowly, the actual cold strength of the mortar is relatively low, and it can only be completely solidified and sintered through the oven. The inclined channel corbel needs to support the weight of the inner ring wall of the annular air duct area. If the mortar in the mortar joints of the corbel area cannot be completely solidified, the inclined channel corbel is easy to deform, causing the annular air duct area to sink, affecting the masonry quality of the CDQ coke oven. It was found on site that after the cold masonry of many CDQ coke ovens, cracks of varying sizes appeared on the top of the partition wall of the CDQ coke oven chute area, and some cracks were even more than 20mm wide, which seriously affected the service life of the CDQ coke; the reason is that the mortar in the corbel joints was not dry and the annular air duct area sank. Summary of the invention

[0005] The present invention provides a corbel structure for a chute area of ​​a dry coke quenching oven. By placing a support in a refractory mud mortar joint between corbel brick layers, the problems of sinking of an annular air duct and cracking of a chute partition wall caused by deformation of the corbel mortar joint and inaccurate control of the corbel elevation are effectively prevented, thereby improving the masonry quality and service life of the dry coke quenching oven.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A corbel structure of a dry quenching coke oven chute area, the corbel structure is built by multiple layers of corbel bricks; a plurality of support members are arranged between two adjacent layers of corbel bricks, the support members are hard support members, the thickness of which is the same as the thickness of the mortar joints, the top surface of the support members is in direct contact with the upper layer of corbel bricks, and the bottom surface of the support members is in direct contact with the lower layer of corbel bricks.

[0008] The thickness of the support member is 2-5 mm, and is divided into various specifications according to the thickness. Different corbel brick layers select support members of corresponding thickness according to their elevations.

[0009] The support members are strip support members or plate support members, and at least two support members are arranged on the same corbel brick; the strip support members are arranged at intervals, and the same strip support member spans two adjacent corbel bricks in the horizontal or vertical direction; the plate support members are evenly arranged on the same corbel brick.

[0010] The outline of the plate-shaped support member is circular or polygonal.

[0011] Except for the brick joints at the spanning points, the distance between the support and the remaining brick joints or the edge of the corbel brick is at least 20 mm, that is, the support is buried in the mortar joints.

[0012] The support member is made of heat-resistant stainless steel or hard refractory material.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] It can fundamentally solve the quality problems of the annular air duct, the sinking of the masonry in the ramp area, and the cracks on the upper part of the ramp partition wall caused by the deformation of the mortar joints of the ramp corbels during the masonry process of the dry quenching coke oven; at the same time, the size of the mortar joints of the corbels can be adjusted by changing the thickness of the supporting parts, and then the elevation of the dry quenching coke corbels can be accurately adjusted, which solves the problem of difficult control of the corbel elevation caused by the deformation of the mortar joints; it effectively improves the masonry quality of the dry quenching coke oven, extends the service life of the dry quenching coke oven, and improves the use efficiency of the dry quenching coke oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a bracket structure in the chute area of ​​a dry quenching coke oven according to the present invention.

[0016] Figure 2 The configuration of the support member of the present invention is shown in FIG. Figure 1 .

[0017] Figure 3 The configuration of the support member of the present invention is shown in FIG. Figure 2 .

[0018] Figure 4 The configuration of the support member of the present invention is shown in FIG. Figure 3 .

[0019] In the figure: 1. Ramp area 2. Corbel bricks 3. Mortar joints 4. Support members 5. Brick joints at the span 6. Other brick joints DETAILED DESCRIPTION

[0020] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0021] like Figure 1 As shown, the present invention is a corbel structure of the CDQ coke oven chute area, the corbel structure is built by multi-layer corbel bricks 2; Figure 2-Figure 4 As shown, a plurality of support members 4 are provided between two adjacent layers of corbel bricks 2. The support members 4 are hard support members, and their thickness is the same as that of the mortar joints 3. The top surfaces of the support members 4 are in direct contact with the upper layer of corbel bricks, and the bottom surfaces of the support members 4 are in direct contact with the lower layer of corbel bricks.

[0022] The support member 4 has a thickness of 2 to 5 mm and is classified into various specifications according to the thickness. Support members 4 of corresponding thickness are selected for different corbel brick layers according to their elevations.

[0023] The support member 4 is a strip support member or a plate support member, and at least two support members 4 are arranged on the same corbel brick 2; wherein the strip support members are arranged at intervals, and the same strip support member spans two adjacent corbel bricks 2 in the horizontal or vertical direction (such as Figure 2 , Figure 3The plate-like support members are evenly spaced on the same corbel brick 2 (as shown); Figure 4 shown).

[0024] The outline of the plate-shaped support member is circular or polygonal.

[0025] Except for the brick joints 5 at the spanning locations, the distance between the support member 4 and the remaining brick joints 6 or the edge of the corbel brick 2 is at least 20 mm, that is, the support member 4 is embedded in the mortar joints 3.

[0026] The support member 4 is made of heat-resistant stainless steel or hard refractory material.

[0027] like Figure 1 As shown, the corbel structure of the dry quenching coke oven chute area 1 is composed of multiple layers of corbel bricks 2, and the corbel bricks 2 are laid with refractory slurry to form mortar joints 3. In the corbel laying process, the present invention places a hard support member 4 in the mortar joint 3 between the corbel brick layers, and the thickness of the support member 4 is the same as the thickness of the mortar joint 3. The corbel bricks 2 are in hard contact with the support member 4 in the mortar joint 3, ensuring that the mortar joint 3 will not be deformed under the support of the support member 4.

[0028] Preferably, at least two support members 4 are placed on each corbel brick 2 at a certain distance to ensure the stability and flatness of the corbel brick layer and prevent the corbel brick 2 from tilting due to single-point or unilateral support.

[0029] The thickness of the support member 4 is divided into several specifications, preferably 2mm, 3mm, 4mm and 5mm. The thickness of each corbel brick layer is selected according to its elevation, and the thickness of the mortar joint 3 is accurately adjusted. When the corbel elevation is inconsistent due to the deviation of the size of the corbel brick 2 or the elevation of the process shell, the height of the mortar joint 3 can be adjusted by using support members 4 of different thicknesses to avoid the deformation of the mortar joint 3 and the difficulty in controlling the corbel elevation due to the high fluidity of the mortar.

[0030] The support member 4 needs to be completely embedded in the ash seam 3 and at least 20 mm away from the edge of the ash seam 3 to prevent the high-temperature airflow from eroding the support member 4 and causing gaps in the ash seam 3 during hot production of the CDQ coke oven.

[0031] The support member 4 may be a strip support member, and the strip support member may be placed longitudinally or transversely (eg Figure 2 , Figure 3 The support member 4 may also be a circular or other shaped plate-shaped support member, such as Figure 4 shown.

[0032] The support member 4 can be made of heat-resistant metal materials such as heat-resistant stainless steel, or of hard refractory materials such as ceramic refractory materials. It is required to have a certain cold compressive strength, but the corrosion resistance is not high. Because the support member 4 is wrapped in the ash seam 3, it only needs to play a supporting role in the cold state; after the furnace is baked, the refractory slurry solidifies, and the ash seam 3 itself can play a supporting role.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A corbel structure in the chute area of ​​a dry quenching coke oven, the corbel structure being constructed by multi-layer corbel bricks; characterized in that: A plurality of support members are arranged between two adjacent layers of corbel bricks. The support members are hard support members, which are placed in the mortar joints between the corbel brick layers during the corbel laying process. The thickness of the support members is the same as the thickness of the mortar joints. The top surface of the support members is in direct contact with the upper corbel bricks, and the bottom surface of the support members is in direct contact with the lower corbel bricks, so as to ensure that the mortar joints will not be deformed under the support of the support objects. The support members are strip support members or plate support members, and at least two support members are arranged on the same corbel brick. The strip support members are arranged at intervals, and the same strip support member spans two adjacent corbel bricks in the horizontal or vertical direction. The plate support members are evenly arranged on the same corbel brick. Except for the brick joints at the spanning locations, the distance between the support members and the remaining brick joints or the edges of the corbel bricks is at least 20 mm, that is, the support members are embedded in the mortar joints. The thickness of the support members is 2 to 5 mm, and they are divided into a variety of specifications according to the thickness. Different corbel brick layers select support members of corresponding thickness according to their elevations.

2. A bracket structure for the chute area of ​​a dry quenching coke oven according to claim 1, characterized in that: The outline of the plate-shaped support member is circular or polygonal.

3. The bracket structure of the chute area of ​​the dry quenching coke oven according to claim 1, characterized in that: The support member is made of heat-resistant stainless steel or hard refractory material.

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