CN217600644U

CN217600644U - Heat recovery coke oven carbonization chamber bottom structure

Info

Publication number: CN217600644U
Application number: CN202221554724.7U
Authority: CN
Inventors: 耿宁; 郑彭; 赵殿辉; 武明华; 刘洪春; 张天宇
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-10-18
Anticipated expiration: 2032-06-21

Abstract

The utility model relates to a bottom structure of a carbonization chamber of a heat recovery coke oven, which comprises a quadruple flame path arranged between main walls of 2 adjacent carbonization chambers; 3 supporting walls for forming the quadruple flame path, the outermost supporting wall and the main wall of the corresponding carbonization chamber are connected through vault centers, and the top of each vault center is provided with a bottom layer; the vault is formed by building overhead bricks, and the bottom layer is formed by building bottom-laying bricks; concave-convex structures are adopted to be matched and built between the over-top bricks and the refractory bricks at the top of the supporting wall and between the over-top bricks and the refractory bricks at the corresponding connection parts of the main wall of the carbonization chamber. The utility model adopts the measures that the bottom of the carbonization chamber is provided with the quadruple flame path, the upper part of the supporting wall is provided with the overhanging structure to be connected with the overhead brick, the overhead brick is built into the vault structure, and the like, thereby ensuring the stable structure of the bottom of the carbonization chamber; the stable and efficient heat transfer of the high-temperature gas to the coal material in the carbonization chamber is realized, and the gas flow resistance is reduced.

Description

Heat recovery coke oven carbonization chamber bottom structure

Technical Field

The utility model relates to a heat recovery coke oven technical field especially relates to a heat recovery coke oven carbonization chamber bottom structure.

Background

The current heat recovery coke oven is generally composed of a furnace bottom, a multi-connected flame path, a main wall, a carbonization chamber and a furnace top. The coking process of the heat recovery coke oven comprises direct heating and indirect heating, coal materials are pyrolyzed in a coking chamber to generate combustible gas, part of the combustible gas is mixed with air entering from the top of the coking chamber and then is combusted, the coal materials are directly heated, and the residual combustible gas which is not fully combusted enters a descending channel in a main wall through holes in the upper part of the main wall, flows from top to bottom, flows out of the descending channel through holes in the lower part of the main wall and flows into a multi-flame path below the coking chamber. In the multi-connected flame path, combustible gas and air entering from the sealing wall are mixed and then fully combusted, heat is transferred to coal materials through the bottom of the carbonization chamber, combusted waste gas enters an ascending channel inside the main wall through a hole in the lower part of the main wall, and finally the waste gas flows out of the heat recovery coke oven body and enters a flue gas pipeline through an ascending pipe in the top.

The bottom of the carbonization chamber is the top of the multi-connected flame path, the bottom of the carbonization chamber is provided with a supporting wall, overhead bricks and carbonization chamber bottom bricks are built between the supporting wall and the main wall, and the total thickness of the overhead bricks and the carbonization chamber bottom bricks is the heat transfer distance of the high-temperature gas. Thus, the requirements for the bottom structure of the carbonization chamber are: not only the weight of the coal in the carbonization chamber is received without collapse, but also the high-temperature gas is ensured to quickly transfer heat to the coal.

The bottom of the carbonization chamber is divided into multiple flame paths by the support walls, high-temperature gas flows in a snake shape between the multiple flame paths, the more the number of the support walls is, the better the structural strength of the bottom of the carbonization chamber is, but the longer the flowing distance of the high-temperature gas is, the larger the flowing resistance is; conversely, the smaller the number of the supporting walls, the shorter the gas flow distance, the smaller the resistance, and the poorer the structural strength of the bottom of the carbonization chamber, at which point the overhead bricks are easily damaged, even resulting in the collapse of the carbonization chamber.

Aiming at the heating mode of the heat recovery coke oven and the bottom structure characteristics of the carbonization chamber, a stable bottom structure of the heat recovery coke oven needs to be designed so as to meet the requirements of rapid heating of coal and small gas resistance.

Disclosure of Invention

The utility model provides a bottom structure of a carbonization chamber of a heat recovery coke oven, which ensures the stability of the bottom structure of the carbonization chamber by adopting measures of arranging a quadruple flame path at the bottom of the carbonization chamber, arranging an overhanging structure at the upper part of a supporting wall to be connected with a top-crossing brick, building the top-crossing brick into a vault structure and the like; compared with the traditional six-linked flame path form, the four-linked flame path form reduces the gas flow resistance while realizing the stable and efficient heat transfer of the high-temperature gas to the coal material in the carbonization chamber.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a bottom structure of a carbonization chamber of a heat recovery coke oven comprises quadruple flame paths arranged between main walls of 2 adjacent carbonization chambers; 3 supporting walls for forming the quadruple flame path, the outermost supporting wall and the main wall of the corresponding carbonization chamber are connected through vault centers, and the top of each vault center is provided with a bottom layer; the vault is formed by building overhead bricks, and the bottom layer is formed by building bottom-laying bricks; concave-convex structures are adopted to be matched and built between the over-top bricks and the refractory bricks at the top of the supporting wall and between the over-top bricks and the refractory bricks at the corresponding connection parts of the main wall of the carbonization chamber.

The top of the vault is a plane, and the bottom layer is built by bottom bricks with the same thickness.

And the top-passing bricks forming the arch crown are built in a matching way through a ditch tongue structure or a step-shaped structure.

The supporting wall is built by multiple layers of refractory bricks, and an overhanging structure which expands outwards is arranged at the upper part of the supporting wall.

The upper layer and the lower layer of the refractory bricks forming the support wall are connected in an occlusion way through a groove tongue structure.

The bottom paving bricks and the top paving bricks are all high-heat-conductivity silica bricks.

Compared with the prior art, the beneficial effects of the utility model are that:

1) The whole structure is simple, and the bottom structure of the carbonization chamber can be ensured to be stable;

2) Compared with the traditional six-linked flame path mode, the four-linked flame path mode reduces the gas flow resistance while realizing the stable and efficient heat transfer of the high-temperature gas to the coal in the carbonization chamber.

Drawings

FIG. 1 is a schematic structural view of a heat recovery coke oven carbonization chamber of the present invention.

In the figure: 1. carbonization chamber 2, carbonization chamber main wall 3, support wall 31, overhanging structure 4, vault 41, overhead brick 5 and bottom brick laying

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in figure 1, the bottom structure of the carbonization chamber of the heat recovery coke oven comprises a quadruple flame path arranged between main walls 2 of adjacent 2 carbonization chambers; 3 supporting walls 3 for forming the quadruple flame path, the outermost supporting wall 3 and the main wall 2 of the corresponding carbonization chamber are connected through a vault 4, and the top of the vault 4 is provided with a bottom layer; the vault 4 is formed by building the overhead bricks 41, and the bottom layer is formed by building the bottom paving bricks 5; concave-convex structures are adopted to be matched and built between the over-top bricks 41 and the refractory bricks at the top of the supporting wall 3 and between the over-top bricks 41 and the refractory bricks at the corresponding connection parts of the main wall 2 of the carbonization chamber.

The top of the vault 4 is a plane, and the bottom layer is built by bottom bricks 5 with the same thickness.

The over-top bricks 41 forming the arch crown 4 are cooperatively built through a ditch-tongue structure or a step-shaped structure.

The support wall 3 is built by multiple layers of refractory bricks, and the upper part of the support wall is provided with an overhanging structure 31 which expands outwards.

The upper layer and the lower layer of the refractory bricks forming the support wall 3 are connected in an occlusion way through a groove tongue structure.

The bottom paving bricks 5 and the top paving bricks 41 are all high-heat-conductivity silica bricks.

In a heat recovery coke oven carbonization chamber bottom structure, 3 knee walls 3 form the quadruple flame path form in 1 bottom of carbonization chamber, have shortened high-temperature gas's flow distance, have reduced the flow resistance.

Vault 4 between 2 adjacent knee walls 3, between knee wall 3 and the main wall 2 of the carbonization chamber is built by over-crown bricks 41, and the over-crown bricks 41 and the knee walls 3 refractory bricks, and the over-crown bricks 41 and the main wall 2 refractory bricks of the carbonization chamber are built by concave-convex matching, so that the stability of the bottom structure of the carbonization chamber is improved.

The bottom of the carbonization chamber 1 is composed of bottom paving bricks 5 and top crossing bricks 41, and the structural form of the vault 4 is adopted to ensure that the heat transfer distance of high-temperature gas is shorter and the heat transfer efficiency is higher.

The bottom-laying bricks 5 and the top-passing bricks 41 are high-heat-conductivity silica bricks, and the physicochemical indexes of the heat transfer coefficient and the like are higher than those of the conventional refractory bricks, so that the heat transfer efficiency can be increased, and the effects of energy conservation and emission reduction are achieved.

The overhead bricks 41 are built in a matched mode through a ditch-tongue structure or a step-shaped structure, and the structural strength is improved.

The upper portion of knee wall 3 adopts overhanging type structure 31, has played fine supporting role to vault 4, is favorable to the overall stability of vault 4.

The upper and lower refractory bricks of the support wall 3 are meshed and connected through a groove tongue structure, so that the overall stability of the support wall 3 is facilitated.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A bottom structure of a carbonization chamber of a heat recovery coke oven comprises quadruple flame paths arranged between main walls of 2 adjacent carbonization chambers; the carbonization chamber main wall structure is characterized in that 3 supporting walls for forming the quadruple flame path, the outermost supporting wall and the corresponding carbonization chamber main wall are connected through vault centers, and the top of each vault center is provided with a bottom layer; the vault is formed by building overhead bricks, and the bottom layer is formed by building bottom-laying bricks; the refractory bricks at the tops of the overhead bricks and the supporting wall and the refractory bricks at the corresponding joints of the overhead bricks and the main wall of the carbonization chamber are all built by adopting the matching of a concave-convex structure.

2. The bottom structure of the carbonization chamber of the coke oven for heat recovery according to claim 1, wherein the top of the arch top is a plane and the bottom layer is built by bottom bricks with the same thickness.

3. The bottom structure of the carbonization chamber of the heat recovery coke oven according to claim 1, wherein the overhead bricks forming the arch crown are constructed by matching a groove-tongue structure or a stepped structure.

4. The bottom structure of the carbonization chamber of the heat recovery coke oven according to claim 1, wherein the supporting wall is constructed by laying a plurality of layers of refractory bricks, and the upper part is provided with an overhanging structure expanding outward.

5. The bottom structure of the carbonization chamber of the heat recovery coke oven as defined in claim 1 or 4, wherein the upper and lower layers of refractory bricks forming the supporting wall are engaged with each other by a tongue and groove structure.

6. The bottom structure of the carbonization chamber of the heat recovery coke oven as claimed in claim 1, wherein the bottom bricks and the top bricks are high thermal conductivity silica bricks.