CN111171846A - Novel coke oven chute structure - Google Patents
Novel coke oven chute structure Download PDFInfo
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- CN111171846A CN111171846A CN201911379195.4A CN201911379195A CN111171846A CN 111171846 A CN111171846 A CN 111171846A CN 201911379195 A CN201911379195 A CN 201911379195A CN 111171846 A CN111171846 A CN 111171846A
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- chute
- chamber
- combustion chamber
- coke oven
- combustion
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
Abstract
The invention relates to a novel coke oven chute region structure, which comprises a chute region, wherein the chute region is arranged above a regenerative chamber and below a combustion chamber and a carbonization chamber, the combustion chamber and the carbonization chamber are arranged alternately, and the bottom of the combustion chamber is connected with the top of the regenerative chamber through a chute; the root of the combustion chamber duplex flue partition wall is provided with a waste gas circulation hole; the bottom surface of the carbonization chamber is higher than the bottom surface of the combustion chamber corresponding to the chute port. The invention is suitable for most low-nitrogen combustion coke ovens which are heated in sections or take the reduction of the combustion intensity as a means, and the heat of the combustion chamber can be effectively transferred to the bottom of the carbonization chamber by heightening the bottom of the carbonization chamber relative to the bottom of the combustion chamber, thereby ensuring the uniform and sufficient heat supply in the coking process and avoiding the occurrence of coke formation at the bottom of the carbonization chamber.
Description
Technical Field
The invention relates to the technical field of coke ovens, in particular to a novel coke oven chute area structure.
Background
With the development of large-scale machine-mounted coke ovens, the heating mode of sectional combustion is commonly applied to the design of the vertical flue of the coke oven, and the heating mode of sectional combustion can effectively reduce the highest temperature of gas in the coke oven during combustion, simultaneously reduce the generation of nitrogen oxides and is beneficial to environmental protection. However, because the heating mode that the bottom heating quantity is far larger than the top heating quantity in the original coke oven design is changed, the risk of coke formation at the lower part of the coke oven carbonization chamber exists.
In the existing coke oven design, a mode of deliberately keeping the supply of lower coal gas sufficient and simultaneously ensuring that the coal gas and the air are quickly mixed and combusted is adopted, but the method is contrary to the aim of low-nitrogen combustion. The reason is mainly because in the staged combustion or similar technologies, the distance between the burning flame and the bottom of the combustion chamber is too large, and in the traditional coke oven, the bottom surface of the combustion chamber corresponding to the inclined channel opening and the bottom surface of the carbonization chamber are in the same horizontal plane, so that the heat supply of the combustion chamber to the bottom of the carbonization chamber is insufficient.
Disclosure of Invention
The invention provides a novel coke oven chute zone structure which is suitable for most low-nitrogen combustion coke ovens with sectional heating or by taking reduction of the combustion intensity as a means.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel coke oven chute region structure comprises a chute region arranged above a regenerative chamber and below a combustion chamber and a carbonization chamber, wherein the combustion chamber and the carbonization chamber are arranged alternately, and the bottom of the combustion chamber is connected with the top of the regenerative chamber through a chute; the root of the combustion chamber duplex flue partition wall is provided with a waste gas circulation hole; the bottom surface of the carbonization chamber is higher than the bottom surface of the combustion chamber corresponding to the chute port.
The height difference between the bottom surface of the carbonization chamber and the bottom surface of the combustion chamber corresponding to the inclined chute opening is 50-900 mm.
The bottom surface of the carbonization chamber is higher than the upper edge of the waste gas circulation hole.
The combustion chamber and the carbonization chamber are separated by a combustion chamber furnace wall, the combustion chamber furnace wall extends into the carbonization chamber in the area corresponding to the lower part of the carbonization chamber, so that the cross section of the lower part of the carbonization chamber is in an isosceles trapezoid shape.
The main body of the chute area is built by chute bricks, the area of the chute area, where the chute is arranged, is composed of one or more precast blocks of refractory castable, and the chute is arranged in the precast blocks of refractory castable.
When the refractory castable precast blocks are multiple blocks, the refractory castable precast blocks are connected in a splicing and buckling mode, and the thickness of the refractory castable precast blocks is larger than that of the single-layer chute bricks.
The chute area is provided with a plurality of supplementary heating holes on the front surface of the coke oven, and the supplementary heating holes are respectively connected with a furnace end air chute or a furnace end gas chute.
Compared with the prior art, the invention has the beneficial effects that:
1) the invention is suitable for various sectional heating or delayed combustion coke ovens, and can effectively improve the heat transfer effect of the combustion chamber to the bottom of the coking chamber and enhance the heat supply of the bottom of the coking chamber to coke while reducing the generation of nitrogen oxides by reducing the intensity of flame combustion at one section of sectional combustion, so that the coking at the bottom of the coking chamber of the coke oven is more complete;
2) the invention can effectively improve the condition that the furnace wall of the combustion chamber locally bears the lateral pressure of the carbonization chamber near the waste gas circulating hole, and enhance the strength and durability of the furnace wall of the combustion chamber;
3) the novel refractory material is applied to the design of the chute, a novel solution is provided for the brick-shaped design of the airflow channel of the complicated chute, and meanwhile, the novel refractory material with good performance also enables the supplementary heating hole to be formed at the chute.
Drawings
FIG. 1 is a schematic diagram of the structure of the chute area of the novel coke oven.
In the figure: 1. chute area 2, carbonization chamber bottom 3, combustion chamber bottom 4 corresponding to chute opening, waste gas circulating hole 5, combustion chamber furnace wall 6, chute
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in figure 1, the novel coke oven chute region structure comprises a chute region 1 which is arranged above a regenerative chamber and below a combustion chamber and a carbonization chamber, wherein the combustion chamber and the carbonization chamber are arranged alternately, and the bottom of the combustion chamber is connected with the top of the regenerative chamber through a chute 6; the root of the combustion chamber duplex flue partition wall is provided with a waste gas circulating hole 4; the height of the bottom surface 2 of the carbonization chamber is higher than that of the bottom surface 3 of the combustion chamber corresponding to the chute opening.
The height difference between the bottom surface 2 of the carbonization chamber and the bottom surface 3 of the combustion chamber corresponding to the mouth of the inclined channel is 50 mm-900 mm.
The height of the bottom surface 2 of the carbonization chamber is higher than the height of the upper edge of the waste gas circulating hole 4.
The combustion chamber and the carbonization chamber are separated by a combustion chamber furnace wall 5, the combustion chamber furnace wall 5 extends into the carbonization chamber in the area corresponding to the lower part of the carbonization chamber, and the cross section of the lower part of the carbonization chamber is in an isosceles trapezoid shape.
The main body of the chute area 1 is built by chute bricks, the area of the chute area 1, which is provided with the chute 6, is composed of one or more precast blocks of refractory castable, and the chute 6 is arranged in the precast blocks of refractory castable.
When the refractory castable precast blocks are multiple blocks, the refractory castable precast blocks are connected in a splicing and buckling mode, and the thickness of the refractory castable precast blocks is larger than that of the single-layer chute bricks.
The chute area 1 is provided with a plurality of supplementary heating holes on the front surface of the coke oven, and the supplementary heating holes are respectively connected with a furnace end air chute or a furnace end gas chute.
The novel coke oven chute structure breaks through the inherent concept that the bottom surface of the combustion chamber and the bottom surface of the carbonization chamber are arranged on the same horizontal plane in the existing coke oven, and the combustion chamber and the carbonization chamber are arranged on different elevations. Through rationally setting up the height of carbonization chamber bottom surface 2, make the carbonization chamber to the lateral pressure release position of combustion chamber brickwork 5 be higher than the region of waste gas circulation hole 4, reduced the damage of carbonization chamber lateral pressure to combustion chamber brickwork 5 near waste gas circulation hole 4, improved the durability of combustion chamber brickwork 5.
Specifically, the lower part of the combustion chamber furnace wall 5 is set to be in the shape of an isosceles trapezoid cross section, so that the structural strength of the lower part of the combustion chamber furnace wall 5 is enhanced, and the combustion chamber furnace wall 5 is more durable. Although the thickness of the lower wall surface of the furnace wall 5 of the combustion chamber is increased, the heat from the bottom surface of the chute 6 is more increased compared with the existing coke oven, so that the coke at the bottom of the coking chamber is more mature.
According to the novel coke oven chute structure, the height of the bottom surface 2 of the coking chamber can be set to be higher than the height of the upper edge of the waste gas circulation hole 4, and can also be set to be lower than the height of the upper edge of the waste gas circulation hole 4, as shown in figure 1, when the height of the bottom surface 2 of the coking chamber is limited to be higher than the height of the upper edge of the waste gas circulation hole 4, the lateral force of coke in the coking chamber applied to the furnace wall 5 of the combustion chamber can be avoided from the weak position, provided with the waste gas circulation hole 4, on the furnace wall 5 of the combustion chamber, so that the durability of the furnace wall 5 of the.
The invention also takes the lead to applying the novel refractory material to the design of the chute area of the coke oven, and the application of the refractory castable precast block to the chute area 1 can meet the structural design of the chute of the complex coke oven and reduce the occurrence of gas leakage. The refractory castable blocks in the chute section 1, which form part of the chute 6, may be one or more blocks, and one refractory castable block may span multiple layers of chute bricks in the elevation direction.
The refractory castable precast block is used as a refractory material of the chute area 1, so that the chute area 1 has certain capability of resisting rapid cooling and rapid heating, air and coal gas can be directly supplemented to the furnace end flame path, the requirement of providing supplementary heating holes in the chute area 1 corresponding to the front surface of the coke oven can be realized, and the heating capability of the furnace end is enhanced.
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 (7)
1. A novel coke oven chute region structure comprises a chute region arranged above a regenerative chamber and below a combustion chamber and a carbonization chamber, wherein the combustion chamber and the carbonization chamber are arranged alternately, and the bottom of the combustion chamber is connected with the top of the regenerative chamber through a chute; the root of the combustion chamber duplex flue partition wall is provided with a waste gas circulation hole; the device is characterized in that the height of the bottom surface of the carbonization chamber is higher than that of the bottom surface of the combustion chamber corresponding to the chute port.
2. The novel coke oven chute area structure as claimed in claim 1, wherein the height difference between the bottom surface of the coking chamber and the bottom surface of the combustion chamber corresponding to the chute port is 50 mm-900 mm.
3. The novel coke oven chute structure of claim 1 wherein the floor of the coking chamber is at a height above the upper edge of the flue gas recirculation holes.
4. The novel coke oven chute section structure as claimed in claim 1, wherein the combustion chamber is separated from the coking chamber by a combustion chamber wall, and the combustion chamber wall extends into the coking chamber in a region corresponding to the lower part of the coking chamber, so that the cross-sectional shape of the lower part of the coking chamber is isosceles trapezoid.
5. The novel coke oven chute area structure as claimed in claim 1, wherein the main body of the chute area is built by chute bricks, the area of the chute area where the chute is arranged is composed of one or more precast blocks of refractory castable material, and the chute is arranged in the precast blocks of refractory castable material.
6. The novel coke oven chute area structure as claimed in claim 5, wherein when the refractory castable precast block is a plurality of blocks, the blocks are connected with each other in a splicing and buckling manner, and the thickness of the refractory castable precast block is larger than that of a single-layer chute block.
7. The novel coke oven chute section structure as claimed in claim 1, wherein the chute section is provided with a plurality of supplementary heating holes on the front surface of the coke oven, and the supplementary heating holes are respectively connected with the furnace end air chute or the furnace end gas chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379195.4A CN111171846A (en) | 2019-12-27 | 2019-12-27 | Novel coke oven chute structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379195.4A CN111171846A (en) | 2019-12-27 | 2019-12-27 | Novel coke oven chute structure |
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| CN111171846A true CN111171846A (en) | 2020-05-19 |
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| CN201911379195.4A Pending CN111171846A (en) | 2019-12-27 | 2019-12-27 | Novel coke oven chute structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066399A (en) * | 2020-09-08 | 2020-12-11 | 鞍钢股份有限公司 | Nitrogen reduction device and nitrogen reduction process suitable for coke oven |
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2019
- 2019-12-27 CN CN201911379195.4A patent/CN111171846A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066399A (en) * | 2020-09-08 | 2020-12-11 | 鞍钢股份有限公司 | Nitrogen reduction device and nitrogen reduction process suitable for coke oven |
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