CN113755187A

CN113755187A - Bracket structure of chute area of coke dry quenching furnace

Info

Publication number: CN113755187A
Application number: CN202111153915.2A
Authority: CN
Inventors: 陈伟; 杨俊峰; 肖长志; 牛聪; 胡昌来
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2021-12-07

Abstract

The invention relates to a bracket structure of a chute area of a dry quenching furnace, which is built by a plurality of layers of bracket bricks; be equipped with a plurality of support piece between 2 adjacent layers of bracket brick, support piece is stereoplasm support piece, and its thickness is the same with the thickness of ash joint, support piece's top surface and upper bracket brick direct contact, support piece's bottom surface and lower floor bracket brick direct contact. According to the invention, the supporting pieces are placed in the refractory mortar joint between the corbel brick layers, so that the problems of annular air duct sinking and chute separation wall cracking caused by corbel mortar joint deformation and inaccurate corbel elevation control are effectively prevented, the building quality of the dry quenching furnace is improved, and the service life of the dry quenching furnace is prolonged.

Description

Bracket structure of chute area of coke dry quenching furnace

Technical Field

The invention relates to the technical field of dry quenching furnaces, in particular to a bracket structure of a chute area of a dry quenching furnace.

Background

The dry quenching has the functions of saving energy, reducing consumption, protecting environment and improving coke quality, and is more and more widely applied in recent years. The dry quenching furnace is key equipment of a dry quenching technology and comprises a prestoring area, an annular air duct area, a chute area and a cooling area from top to bottom, wherein the bracket of the chute area 1 is built by a plurality of layers of bracket bricks 2 (as shown in figure 1) and is an important structure for supporting an annular wall in the dry quenching furnace. In actual production, the bracket is easy to wear, crack and even collapse due to the reasons of heavy bearing, frequent fluctuation of operating temperature, long-term scouring by high-temperature coke in a dry quenching furnace and high-temperature circulating airflow containing coke powder and the like, and is a bottleneck for determining the service life of the refractory material of the dry quenching furnace. The bracket needs to be frequently overhauled in the current production process, so that the production efficiency of dry quenching is greatly reduced, and the production cost is increased.

The service life of the bracket of the chute is related to the structure of the bracket, the selection of refractory materials, the masonry quality, production operation and other factors. In recent years, many attempts have been made to prolong the service life of corbels by improving the masonry quality, for example, chinese patent applications with publication numbers CN106833685A, CN 106833684a and CN 106833686A, which respectively describe several dry quenching corbel structures, and prevent the corbel bricks from breaking due to the erosion of air flow to the ash joint in the production process by adopting a method of further feeding a corbel facing brick structure or coating a castable outside the corbel. Chinese patent applications CN 101928575A, CN 107129814a and CN 101948697a respectively describe methods for controlling the construction of chute areas of dry quenching furnaces, and improve the construction quality of chute areas by controlling the elevation, flatness, central axis, mortar fullness, and supporting arc arches of corbels.

During construction and production, the refractory slurry for building the coke dry quenching furnace is generally thinner, so that the elevation control through the mortar joint is difficult; in addition, because the moisture in the mortar joints between the refractory bricks is volatilized slowly, the actual cold strength of the mortar is low, and the mortar can be completely solidified and sintered only by a baking furnace. The bracket of the chute needs to support the weight of the annular wall in the annular air duct area, and if the fire clay in the mortar joint of the bracket area cannot be completely cured, the bracket of the chute is easy to deform, so that the annular air duct area sinks, and the masonry quality of the dry quenching furnace is affected. On-site discovery shows that after a plurality of dry quenching furnaces are built in a cold state, cracks with different sizes appear on the top of a chute partition wall of the dry quenching furnaces, the width of some cracks even reaches more than 20mm, and the service life of the dry quenching furnaces is seriously influenced; the reason is caused by the fact that the bracket mortar joint fire mud is not dry and the annular air duct zone sinks.

Disclosure of Invention

The bracket structure of the chute area of the dry quenching furnace provided by the invention has the advantages that the problems of annular air duct sinking and chute partition wall cracking caused by bracket mortar joint deformation and inaccurate bracket elevation control are effectively prevented by arranging the supporting piece in the refractory mortar joint between the bracket brick layers, the building quality of the dry quenching furnace is improved, and the service life of the dry quenching furnace is prolonged.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bracket structure of a chute area of a dry quenching furnace is characterized in that the bracket structure is built by a plurality of layers of bracket bricks; be equipped with a plurality of support piece between 2 adjacent layers of bracket brick, support piece is stereoplasm support piece, and its thickness is the same with the thickness of ash joint, support piece's top surface and upper bracket brick direct contact, support piece's bottom surface and lower floor bracket brick direct contact.

The thickness of support piece is 2 ~ 5mm, and divide into multiple specification according to thickness, and the support piece that corresponds thickness is selected for use according to its elevation on different bracket brick layers.

The supporting pieces are strip-shaped supporting pieces or plate-shaped supporting pieces, and at least 2 supporting pieces are arranged on the same bracket brick; wherein the strip-shaped supporting pieces are arranged at intervals, and the same strip-shaped supporting piece spans over 2 adjacent bracket bricks along the transverse direction or the longitudinal direction; the plate-shaped supporting pieces are uniformly arranged on the same bracket brick at intervals.

The plate-shaped support is circular or polygonal in outline.

The distance between the supporting piece and the edge of the rest brick joints or corbel bricks is at least 20mm except the brick joints where the supporting piece spans, namely the supporting piece is embedded in the mortar joints.

The supporting piece is made of heat-resistant stainless steel or hard refractory materials.

Compared with the prior art, the invention has the beneficial effects that:

the quality problems of annular air ducts, sinking of brickworks in the chute area, cracks on the upper part of the chute partition wall and the like caused by deformation of mortar joints of the brackets of the chute in the building process of the dry quenching furnace can be fundamentally solved; meanwhile, the size of the bracket ash joint can be adjusted by changing the thickness of the supporting piece, so that the elevation of the dry quenching bracket is accurately adjusted, and the problem that the bracket elevation is difficult to control due to deformation of the ash joint is solved; effectively improves the masonry quality of the dry quenching furnace, prolongs the service life of the dry quenching furnace and improves the service efficiency of the dry quenching furnace.

Drawings

FIG. 1 is a schematic view of a corbel structure in a chute area of a dry quenching furnace according to the present invention.

Fig. 2 is a schematic view showing a first arrangement of the supporting member according to the present invention.

Fig. 3 is a schematic view of the arrangement of the supporting member according to the present invention.

Fig. 4 is a third schematic view of the arrangement of the supporting member according to the present invention.

In the figure: 1. chute area 2, corbel brick 3, mortar joint 4, supporting piece 5, brick joint 6 at crossing position and other brick joints

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in figure 1, the invention is a bracket structure of a chute area of a dry quenching furnace, and the bracket structure is built by a plurality of layers of bracket bricks 2; as shown in fig. 2-4, a plurality of supporting members 4 are arranged between the adjacent 2 layers of corbel bricks 2, the supporting members 4 are hard supporting members, the thickness of the supporting members 4 is the same as that of the mortar joints 3, the top surfaces of the supporting members 4 are in direct contact with the upper layer of corbel bricks, and the bottom surfaces of the supporting members 4 are in direct contact with the lower layer of corbel bricks.

The thickness of support piece 4 is 2 ~ 5mm, and divide into multiple specification according to thickness, and support piece 4 that corresponds thickness is selected for use according to its elevation on different bracket brick layers.

The supporting pieces 4 are strip-shaped supporting pieces or plate-shaped supporting pieces, and at least 2 supporting pieces 4 are arranged on the same corbel brick 2; wherein the strip-shaped supporting pieces are arranged at intervals, and the same strip-shaped supporting piece spans the adjacent 2 corbel bricks 2 along the transverse direction or the longitudinal direction (as shown in fig. 2 and 3); the plate-like supports are evenly spaced on the same corbel tile 2 (as shown in figure 4).

The plate-shaped support is circular or polygonal in outline.

The distance of the support 4 from the remaining brick joints 6 or the edge of the corbel brick 2 is at least 20mm, except for the brick joint 5 where it crosses, i.e. the support 4 is embedded in the mortar joint 3.

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

As shown in figure 1, the bracket structure of the chute area 1 of the dry quenching furnace consists of a plurality of layers of bracket bricks 2, and mortar joints 3 are formed by refractory mortar when the bracket bricks 2 are built. In the corbel masonry process, the hard supporting pieces 4 are placed in the mortar joints 3 among the corbel brick layers, the thickness of each supporting piece 4 is the same as that of each mortar joint 3, the corbel bricks 2 are in hard contact with the supporting pieces 4 in the mortar joints 3, and the mortar joints 3 are guaranteed not to deform under the support of the supporting pieces 4.

Preferably, 2 supporting members 4 are placed on each corbel block 2 at least at intervals to ensure the stability and flatness of the corbel block layer and prevent the corbel block 2 from being inclined due to single-point or single-side support.

The thickness of support piece 4 divide into several kinds of specifications, preferably four kinds of specifications of 2mm, 3mm, 4mm and 5mm, and required support piece 4's thickness is selected according to its elevation in each layer bracket brick layer to realize the accurate adjustment of 3 thicknesses of mortar joint. When the size of the bracket brick 2 or the elevation of the process shell has deviation to cause inconsistency of the elevation of the bracket, the height of the mortar joint 3 can be adjusted by adopting the supporting pieces 4 with different thicknesses in an auxiliary mode, and the problems that the mortar joint 3 is deformed and the elevation of the bracket is difficult to control due to large mortar flowability are avoided.

The support 4 needs to be completely embedded in the ash joint 3, and the distance between the support 4 and the edge of the ash joint 3 is at least 20mm, so that the ash joint 3 is prevented from generating a gap due to erosion of high-temperature airflow to the support 4 during the thermal-state production of the dry quenching furnace.

The support 4 may be a strip support, and the strip support may be placed in a longitudinal or transverse direction (as shown in fig. 2, 3). The support 4 may also be a plate-like support of circular or other shape, as shown in fig. 4.

The supporting piece 4 can be made of heat-resistant metal materials such as heat-resistant stainless steel and the like, and can also be made of hard refractory materials such as ceramic refractory materials and the like, and the supporting piece 4 needs to have certain cold-state compressive strength but has low requirement on the corrosion resistance because the supporting piece 4 is wrapped in the mortar joint 3 and only needs to play a supporting role in a cold state; after the furnace is dried, the refractory mortar is solidified, and the mortar joint 3 can play a supporting role.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A bracket structure of a chute area of a dry quenching furnace is characterized in that the bracket structure is built by a plurality of layers of bracket bricks; the supporting piece is a hard supporting piece, the thickness of the supporting piece is the same as that of the mortar joint, the top surface of the supporting piece is in direct contact with the upper bracket brick, and the bottom surface of the supporting piece is in direct contact with the lower bracket brick.

2. The bracket structure for the chute area of the dry quenching furnace as claimed in claim 1, wherein the thickness of the support member is 2-5 mm, the support member is divided into a plurality of specifications according to the thickness, and support members with corresponding thickness are selected for different bracket brick layers according to the elevations of the support members.

3. The dry quenching furnace chute bracket structure according to claim 1 or 2, wherein the support is a strip-shaped support or a plate-shaped support, and at least 2 supports are arranged on the same bracket brick; wherein the strip-shaped supporting pieces are arranged at intervals, and the same strip-shaped supporting piece spans over 2 adjacent bracket bricks along the transverse direction or the longitudinal direction; the plate-shaped supporting pieces are uniformly arranged on the same bracket brick at intervals.

4. The dry quenching furnace chute area corbel structure according to claim 3, wherein the plate-like supports are circular or polygonal in profile.

5. The corbel structure for a chute section of a dry quenching furnace as claimed in claim 3, wherein the supports are spaced apart from the edges of the remaining bricks or corbel blocks by a distance of at least 20mm, except for the brick gaps where they cross, i.e. the supports are embedded in the mortar gaps.

6. The corbel structure for a chute section of a dry quenching furnace as claimed in claim 3, wherein the support is made of heat-resistant stainless steel or a hard refractory material.