阅读说明：本技术 一种热回收焦炉炭化室结构 (Heat recovery coke oven carbonization chamber structure ) 是由 刘洪春 耿宁 杨俊峰 赵殿辉 韩龙 肖长志 于 2021-07-29 设计创作，主要内容包括：本发明涉及一种热回收焦炉炭化室结构,炭化室包括顶部砌体；所述顶部砌体由中部砌体及端部砌体组成,其中端部砌体分别位于炭化室的两端；中部砌体及端部砌体的顶部均为拱形结构,其中端部砌体自内向外呈下降的阶梯状,使炭化室两端炉门的面积小于炭化室内部横截面的面积。本发明通过改变机侧、焦侧即炭化室两端炉口位置的拱顶结构,使炉口处拱顶砖低于炭化室中间拱顶砖的标高,减小炉门的面积,进而有效减少热回收焦炉的热量损失；同时,在炭化室顶部设隔热层,进一步减少热回收焦炉的热量损失。(The invention relates to a carbonization chamber structure of a heat recovery coke oven, wherein a carbonization chamber comprises a top masonry; the top masonry consists of a middle masonry and end masonry, wherein the end masonry is respectively positioned at two ends of the carbonization chamber; the tops of the middle masonry and the end masonry are both arch structures, wherein the end masonry is in a descending stair-step shape from inside to outside, so that the areas of furnace doors at two ends of the carbonization chamber are smaller than the area of the inner cross section of the carbonization chamber. According to the invention, the arch crown structure of the side of the machine and the coke side, namely the positions of the oven ports at two ends of the carbonization chamber, is changed, so that the arch crown bricks at the oven ports are lower than the elevation of the middle arch crown bricks of the carbonization chamber, the area of the oven door is reduced, and the heat loss of the heat recovery coke oven is effectively reduced; meanwhile, the heat insulation layer is arranged at the top of the carbonization chamber, so that the heat loss of the heat recovery coke oven is further reduced.)

1. A heat recovery coke oven carbonization chamber structure comprises a top brickwork; the top masonry is composed of a middle masonry and end masonry, wherein the end masonry is respectively positioned at two ends of the carbonization chamber; the tops of the middle masonry and the end masonry are both arch structures, wherein the end masonry is in a descending stair-step shape from inside to outside, so that the areas of furnace doors at two ends of the carbonization chamber are smaller than the area of the inner cross section of the carbonization chamber.

2. The heat recovery coke oven carbonization chamber structure as defined in claim 1, wherein the top brickwork is provided with a thermal insulation layer on the outer side thereof, and the thermal insulation layer corresponding to the middle brickwork has the same elevation as that of the thermal insulation layer corresponding to the end brickwork.

3. The heat recovery coke oven carbonization chamber structure of claim 1, wherein the middle masonry and the end masonry are constructed by a plurality of refractory bricks, and the adjacent 2 rings of refractory bricks constituting the middle masonry and the end masonry are engaged and constructed.

4. The heat recovery coke oven carbonization chamber structure according to claim 2, wherein the heat insulation layer is composed of heat insulation bricks, heat insulation castable or heat insulation fiber products.

5. The heat recovery coke oven carbonization chamber structure as defined in claim 1, wherein the height difference between the bottom surface of the middle masonry and the bottom surface of the end masonry is 500-800 mm corresponding to the center of the vault.

6. The heat recovery coke oven coking chamber structure of claim 1 wherein the end brickwork is comprised of 3-5 rings of refractory bricks with the difference in elevation between adjacent 2 rings of refractory bricks being no greater than 1/2 of the height of the refractory bricks.

Technical Field

The invention relates to the technical field of coke ovens, in particular to a heat recovery coke oven carbonization chamber structure.

Background

At present, the domestic and external heat recovery coke ovens mostly adopt a heating mode combining direct heating and indirect heating, namely, the upper part of coal in a carbonization chamber adopts direct heating, the lower part of the coal adopts indirect heating, and finally the coal is refined into coke.

In the production process of the heat recovery coke oven, high-temperature flue gas is generated by the combustion of volatile components precipitated from coal in a carbonization chamber in a high-temperature state and the contact of part of the coal and coke generated by the coal in the oven with air. After the high-temperature flue gas enters the boiler through the pipeline to recover heat, steam is generated to drive the steam turbine to generate electricity, and in order to fully utilize the heat, the requirements on the heat recovery coke oven are to reduce the heat dissipation of the surface of the oven body and the heat loss in the flowing process of the high-temperature flue gas as much as possible.

The high-temperature flue gas is full of the inner space of the carbonization chamber, heat is transferred to the furnace door in the form of heat conduction and heat radiation, the furnace door is divided into an upper furnace door and a lower furnace door, the inner part of the furnace door is lined with a refractory material, the outer part of the furnace door is made of a metal material, and the heat generated by the high-temperature flue gas is finally dissipated into the air through the furnace door. In order to reduce the heat loss of the heat recovery coke oven, the heat transfer can be reduced by reducing the heat transfer area, reducing the heat conductivity of the material and the like according to the heat transfer principle. In practical operation, the better method is to reduce the heat transfer path and improve the performance of the heat insulating material on the surface of the furnace body.

Aiming at the characteristics of the high-temperature flue gas system of the heat recovery coke oven, the invention improves the oven body structure of the heat recovery coke oven so as to reduce the heat dissipation capacity of the surface of the coke oven.

Disclosure of Invention

The invention provides a carbonization chamber structure of a heat recovery coke oven, which is characterized in that the arch crown structure of the side of the oven and the coke side, namely the positions of oven mouths at two ends of the carbonization chamber, are changed, so that the arch crown bricks at the oven mouths are lower than the elevation of the middle arch crown bricks of the carbonization chamber, the area of the oven door is reduced, and the heat loss of the heat recovery coke oven is effectively reduced; meanwhile, the heat insulation layer is arranged at the top of the carbonization chamber, so that the heat loss of the heat recovery coke oven is further reduced.

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

a heat recovery coke oven carbonization chamber structure comprises a top brickwork; the top masonry consists of a middle masonry and end masonry, wherein the end masonry is respectively positioned at two ends of the carbonization chamber; the tops of the middle masonry and the end masonry are both arch structures, wherein the end masonry is in a descending stair-step shape from inside to outside, so that the areas of furnace doors at two ends of the carbonization chamber are smaller than the area of the inner cross section of the carbonization chamber.

The insulating layer is established in the outside of top brickwork, and the insulating layer that corresponds the middle part brickwork is unanimous with the insulating layer elevation that corresponds the tip brickwork.

The middle masonry and the end masonry are formed by building a plurality of refractory bricks, and the adjacent 2 rings of refractory bricks forming the middle masonry and the end masonry are meshed and built.

The heat insulation layer is composed of heat insulation bricks, heat insulation casting materials or heat insulation fiber products.

Corresponding to the center of the vault, the height difference between the bottom surface of the middle masonry and the bottom surface of the end masonry is 500-800 mm.

The end brickwork consists of 3-5 rings of refractory bricks, and the elevation difference of the adjacent 2 rings of refractory bricks is not greater than 1/2 of the height of the refractory bricks.

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

1) the vault structure of the oven ports at the side and the coke side, namely the two ends of the carbonization chamber, is changed, the arch crown bricks of the brickworks at the end parts are staggered layer by layer to form a step-shaped structure which is lower than the elevation of the arch crown bricks of the brickworks at the middle part, and the heat loss of the heat recovery coke oven is effectively reduced by reducing the area of the oven door (upper oven door);

2) the heat insulation layer is arranged at the top of the carbonization chamber, so that the heat loss of the heat recovery coke oven is further reduced;

3) the thermal efficiency of the coke oven is improved, and the external operating environment of the coke oven is improved;

4) the utilization rate of the coke oven heat is improved, the purposes of energy conservation and emission reduction are achieved, and the method has good economic benefit and environmental benefit and is worthy of popularization.

Drawings

FIG. 1 is a schematic view of the structure of the carbonization chamber of the present invention.

In the figure: 1. middle masonry 2, end masonry 3, thermal insulation layer 4, furnace door

Detailed Description

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

as shown in FIG. 1, the invention relates to a heat recovery coke oven carbonization chamber structure, wherein a carbonization chamber comprises a top brickwork; the top masonry consists of a middle masonry 1 and end masonry 2, wherein the end masonry 2 is respectively positioned at two ends of the carbonization chamber; the tops of the middle brickwork 1 and the end brickwork 2 are both arch structures, wherein the end brickwork 2 is in a descending ladder shape from inside to outside, so that the areas of furnace doors 4 at two ends of the carbonization chamber are smaller than the area of the inner cross section of the carbonization chamber.

Insulating layer 3 is established in the outside of top brickwork, and insulating layer 3 that corresponds middle part brickwork 1 is unanimous with the 3 elevations of insulating layer that correspond tip brickwork 2.

The middle masonry 1 and the end masonry 2 are formed by building a plurality of refractory bricks, and the adjacent 2 rings of refractory bricks forming the middle masonry 1 and the end masonry 2 are meshed and built.

The heat insulation layer 3 is composed of heat insulation bricks, heat insulation casting materials or heat insulation fiber products.

Corresponding to the center of the vault, the height difference between the bottom surface of the middle masonry 1 and the bottom surface of the end masonry 2 is 500-800 mm.

The end brickwork 2 consists of 3-5 rings of refractory bricks, and the elevation difference of the adjacent 2 rings of refractory bricks is not greater than 1/2 of the height of the refractory bricks.

The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples.

[ examples ] A method for producing a compound

In the embodiment, the carbonization chamber of the heat recovery coke oven comprises a middle masonry, end masonry 2 positioned at the oven mouths at the two ends of the side and the coke side of the carbonization chamber, and a heat insulation layer 3 arranged at the top of the carbonization chamber.

As shown in figure 1, the elevation of the end brickwork 2 is lower than that of the middle brickwork 1 and is arranged in a ladder shape, so that the area of the interior of the carbonization chamber towards the direction of the furnace door 4 is gradually reduced, and the area of the furnace door 4 is the minimum. The heat loss of the heat recovery coke oven is effectively reduced by reducing the heat transfer area.

In addition, a heat insulation layer 3 is arranged on the outer side of the brickwork at the top of the carbonization chamber. The heat insulation layer 3 can be built by heat insulation bricks, or poured by heat insulation castable, or laid by heat insulation fiber products. The thermal conductivity of the thermal insulation layer 3 is very small, and the heat loss of the heat recovery coke oven can be effectively reduced by reducing the thermal conductivity of the heat transfer path. In this embodiment, the heat insulation layer 3 is formed by pouring heat insulation castable.

The middle masonry is formed by building refractory bricks, and the adjacent 2 rings of refractory bricks are staggered and occluded for building.

In this embodiment, the end brickwork is built by the refractory bricks with the same specification as the middle brickwork, and comprises 3 rings of refractory bricks, and from inside to outside, the elevation of the vault of the end brickwork is lowered layer by layer, and the elevation difference between the adjacent 2 rings of refractory bricks is the height of a half brick.

The difference in elevation of tip brickwork and middle part brickwork should not be too big, otherwise can influence furnace end department burnt cake ripe, and in this embodiment, this difference in elevation is 600 mm.

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.