A coke oven chute area structure

Abstract

The present invention relates to a novel coke oven chute area structure, comprising a chute area arranged above a heat storage 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 to the top of the heat storage chamber through a chute; an exhaust gas circulation hole is arranged at the root of the double-connected fire channel partition wall of the combustion chamber; and the bottom surface height of the carbonization chamber is higher than the bottom surface height of the corresponding combustion chamber at the chute opening. The present invention is suitable for most low-nitrogen combustion coke ovens that use segmented heating or reduce the intensity of combustion as a means. By raising the bottom of the carbonization chamber relative to the bottom of the combustion chamber, the heat of the combustion chamber can be effectively transferred to the bottom of the carbonization chamber, thereby ensuring uniform and sufficient heat supply during the coking process and avoiding the formation of coke at the bottom of the carbonization chamber.

Description

Technical Field

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

[0002] With the development of large-scale coke ovens, the staged combustion heating method has been widely used in the design of the vertical fire channel of the coke oven. The staged combustion heating method can effectively reduce the maximum temperature of the gas combustion in the coke oven, and at the same time reduce the generation of nitrogen oxides, which is beneficial to environmental protection. However, since it changes the original coke oven design in which the bottom heating amount is much greater than the top heating method, there is a risk of coke formation in the lower part of the coke oven carbonization chamber.

[0003] The coke oven design industry has not yet formed a clear solution to the above problems. In the current coke oven design, most of them deliberately maintain sufficient supply of gas in the lower part and ensure that gas and air merge and burn as soon as possible, but this approach is contrary to the goal of low-nitrogen combustion. The main reason is that in staged combustion or similar technologies, the distance between the burning flame and the bottom of the combustion chamber is too large, while in traditional coke ovens, the bottom of the combustion chamber corresponding to the inclined opening and the bottom of the carbonization chamber are at the same level, resulting in insufficient heat supply from the combustion chamber to the bottom of the carbonization chamber. Summary of the invention

[0004] The present invention provides a coke oven chute zone structure, which is suitable for most segmented heating or low-nitrogen combustion coke ovens that use a means to reduce the intensity of combustion. By raising the bottom of a carbonization chamber relative to the bottom of a combustion chamber, the heat of the combustion chamber can be effectively transferred to the bottom of the carbonization chamber, thereby ensuring uniform and sufficient heat supply during the coking process and avoiding the formation of coke at the bottom of the carbonization chamber.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A coke oven chute area structure comprises a chute area arranged above a heat storage 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 to the top of the heat storage chamber through a chute; an exhaust gas circulation hole is arranged at the root of the double fire channel partition wall of the combustion chamber; the bottom surface height of the carbonization chamber is higher than the bottom surface height of the corresponding combustion chamber at the chute mouth.

[0007] The height difference between the bottom surface of the carbonization chamber and the bottom surface of the combustion chamber corresponding to the inclined passage is 50 mm to 900 mm.

[0008] The height of the bottom surface of the carbonization chamber is higher than the height of the upper edge of the exhaust gas circulation hole.

[0009] The combustion chamber and the carbonization chamber are separated by a combustion chamber furnace wall, and the combustion chamber furnace wall extends into the carbonization chamber in an area corresponding to the lower part of the carbonization chamber, so that the cross-sectional shape of the lower part of the carbonization chamber is an isosceles trapezoid.

[0010] The main body of the ramp area is built with ramp bricks, and the area of ​​the ramp area where the ramp is arranged is composed of one or more refractory castable prefabricated blocks, and the ramp is arranged in the refractory castable prefabricated blocks.

[0011] When there are multiple refractory castable prefabricated blocks, they are connected to each other by splicing and buckling, and the thickness of the refractory castable prefabricated blocks is greater than the thickness of a single-layer ramp brick.

[0012] The chute area is provided with a plurality of supplementary heating holes on the front of the coke oven, and the supplementary heating holes are respectively connected to the furnace head air chute or the furnace head gas chute.

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

[0014] 1) The present invention is applicable to various types of segmented heating or delayed combustion type coke ovens. While reducing the intensity of the flame combustion in the segmented combustion stage and thus reducing the generation of nitrogen oxides, it can effectively improve the heat transfer effect of the combustion chamber to the bottom of the carbonization chamber, enhance the heat supply of the bottom of the carbonization chamber to the coke, and make the coking at the bottom of the coke oven carbonization chamber more complete;

[0015] 2) The present invention can effectively improve the condition that the combustion chamber furnace wall is locally subjected to the lateral pressure of the carbonization chamber near the exhaust gas circulation hole, thereby enhancing the strength and durability of the combustion chamber furnace wall;

[0016] 3) The present invention applies new refractory materials to the ramp design, providing a new solution for the complex ramp airflow channel brick design. At the same time, the new refractory materials with good performance also make it possible to open supplementary heating holes at the ramp. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a coke oven chute area structure according to the present invention.

[0018] In the figure: 1. Inclined channel area 2. Carbonization chamber bottom 3. Combustion chamber bottom corresponding to the inclined channel opening 4. Exhaust gas circulation hole 5. Combustion chamber furnace wall 6. Inclined channel DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0020] like Figure 1 As shown, a coke oven chute area structure described in the present invention includes a chute area 1 arranged above the heat storage chamber and below the combustion chamber and the carbonization chamber, the combustion chamber and the carbonization chamber are arranged alternately, and the bottom of the combustion chamber is connected to the top of the heat storage chamber through a chute 6; an exhaust gas circulation hole 4 is arranged at the root of the double fire channel partition wall of the combustion chamber; the bottom surface 2 of the carbonization chamber is higher than the bottom surface 3 of the corresponding combustion chamber at the chute mouth.

[0021] The height difference between the carbonization chamber bottom surface 2 and the corresponding combustion chamber bottom surface 3 at the inclined passage is 50 mm to 900 mm.

[0022] The height of the bottom surface 2 of the carbonization chamber is higher than the height of the upper edge of the exhaust gas circulation hole 4 .

[0023] The combustion chamber and the carbonization chamber are separated by a combustion chamber furnace wall 5, and the combustion chamber furnace wall 5 extends into the carbonization chamber in an area corresponding to the lower part of the carbonization chamber, so that the cross-sectional shape of the lower part of the carbonization chamber is an isosceles trapezoid.

[0024] The main body of the ramp area 1 is built with ramp bricks, and the area of ​​the ramp area 1 where the ramp 6 is arranged is composed of one or more refractory castable prefabricated blocks, and the ramp 6 is arranged in the refractory castable prefabricated blocks.

[0025] When there are multiple refractory castable prefabricated blocks, they are connected to each other by splicing and buckling, and the thickness of the refractory castable prefabricated blocks is greater than the thickness of a single-layer ramp brick.

[0026] The chute area 1 is provided with a plurality of supplementary heating holes on the front of the coke oven, and the supplementary heating holes are respectively connected to the furnace head air chute or the furnace head gas chute.

[0027] The novel coke oven chute structure of the present invention breaks through the inherent concept that the bottom surface of the combustion chamber and the bottom surface of the carbonization chamber are set at the same horizontal plane in the existing coke oven, and sets the two at different elevations. By reasonably setting the height of the bottom surface 2 of the carbonization chamber, the lateral pressure release portion of the carbonization chamber on the combustion chamber furnace wall 5 is higher than the area of ​​the exhaust gas circulation hole 4, which reduces the damage of the lateral pressure of the carbonization chamber to the combustion chamber furnace wall 5 near the exhaust gas circulation hole 4, and improves the durability of the combustion chamber furnace wall 5.

[0028] Specifically, the present invention enhances the structural strength of the lower part of the combustion chamber furnace wall 5 by setting the lower part of the combustion chamber furnace wall 5 to an isosceles trapezoidal cross-section shape, making the combustion chamber furnace wall 5 more durable. Although the thickness of the lower wall of the combustion chamber furnace wall 5 is increased, compared with the existing coke oven, the heat from the bottom surface of the chute 6 is greater, making the coke at the bottom of the carbonization chamber easier to mature.

[0029] In the novel coke oven chute structure described in the present invention, the height of the bottom surface 2 of the carbonization chamber can be set to be higher than the upper edge height of the exhaust gas circulation hole 4, and can also be set to be lower than the upper edge height of the exhaust gas circulation hole 4. Figure 1 As shown, when the height of the bottom surface 2 of the carbonization chamber is limited to be higher than the height of the upper edge of the exhaust gas circulation hole 4, the lateral force exerted by the coke in the carbonization chamber on the combustion chamber furnace wall 5 will avoid the weak position of the combustion chamber furnace wall 5 where the exhaust gas circulation hole 4 is opened, thereby enhancing the durability of the combustion chamber furnace wall 5.

[0030] The present invention is also the first to apply new refractory materials to the design of the coke oven chute area. The application of refractory castable prefabricated blocks in the chute area 1 can meet the complex coke oven chute structure design and reduce the occurrence of gas leakage. The refractory castable prefabricated blocks used to form the chute 6 part in the chute area 1 can be one or more, and one refractory castable prefabricated block can span multiple layers of chute bricks in the height direction.

[0031] Using refractory castable prefabricated blocks as the refractory material of the ramp area 1 can make the ramp area 1 have a certain ability to withstand rapid cooling and heating, making it possible to directly supplement air and gas to the furnace head fire channel, and realizing the need to set supplementary heating holes in the ramp area 1 corresponding to the front of the coke oven, thereby enhancing the heating capacity of the furnace head. When in use, it is only necessary to open a plurality of supplementary heating holes in the ramp area 1 corresponding to the front of the coke oven and connect them to the furnace head air ramp or the furnace head gas ramp.

[0032] 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 coke oven chute area structure, comprising a chute area arranged above a regenerator 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 to the top of the regenerator through a chute; an exhaust gas circulation hole is arranged at the root of the double-connected fire channel partition wall of the combustion chamber; characterized in that: The bottom surface height of the carbonization chamber is higher than the bottom surface height of the corresponding combustion chamber at the inclined passage.

2. A coke oven chute area structure according to claim 1, characterized in that: The height difference between the bottom surface of the carbonization chamber and the bottom surface of the combustion chamber corresponding to the inclined passage is 50 mm to 900 mm.

3. A coke oven chute area structure according to claim 1, characterized in that: The height of the bottom surface of the carbonization chamber is higher than the height of the upper edge of the exhaust gas circulation hole.

4. A coke oven chute area structure according to claim 1, characterized in that: The combustion chamber and the carbonization chamber are separated by a combustion chamber furnace wall, and the combustion chamber furnace wall extends into the carbonization chamber in an area corresponding to the lower part of the carbonization chamber, so that the cross-sectional shape of the lower part of the carbonization chamber is an isosceles trapezoid.

5. A coke oven chute area structure according to claim 1, characterized in that: The main body of the ramp area is built with ramp bricks, and the area of ​​the ramp area where the ramp is arranged is composed of one or more refractory castable prefabricated blocks, and the ramp is arranged in the refractory castable prefabricated blocks.

6. A coke oven chute area structure according to claim 5, characterized in that: When there are multiple refractory castable prefabricated blocks, they are connected to each other by splicing and buckling, and the thickness of the refractory castable prefabricated blocks is greater than the thickness of a single-layer ramp brick.

7. A coke oven chute area structure according to claim 1, characterized in that: The chute area is provided with a plurality of supplementary heating holes on the front of the coke oven, and the supplementary heating holes are respectively connected to the furnace head air chute or the furnace head gas chute.

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