A coke oven roof structure

Abstract

The present invention relates to a coke oven roof structure, wherein the roof area of ​​the coke oven includes an upper masonry, a lower masonry, and a sliding layer arranged between the upper masonry and the lower masonry; along the machine side-coke side direction, the roof area is provided with a plurality of fire-viewing holes above the corresponding combustion chamber, a plurality of coal loading holes / smoke guide holes above the corresponding carbonization chamber, and a riser hole and a furnace head grouting hole are arranged at the furnace head position; the roof area is also provided with a plurality of middle grouting holes. Through the mutual interlocking structure between the upper masonry and the lower masonry, the tightness of the coke oven roof during the overall expansion process can be ensured; after the oven is baked, grouting through the reserved middle grouting holes can effectively reduce the raw coal gas leakage rate of the entire coke oven roof area during the production process.

Description

Technical Field

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

[0002] The coke oven top area refers to the area above the carbonization chamber cross-roof bricks, which is usually equipped with coal loading holes / smoke guide holes, riser holes, fire viewing holes, oven drying holes, horizontal and vertical pull grooves and furnace top trolley foundations. There are many types of refractory materials used in the construction of the furnace top area. Generally, silica bricks are used for the cross-roof bricks, but clay bricks are mostly used on both sides of the machine coke and the coal loading holes / smoke guide holes and riser pipes; the area just above the carbonization chamber and between the coal loading holes / smoke guide holes is mostly made of silica bricks and clay bricks in the lower part, and refractory insulation bricks are mostly used in the upper part, and cylinder bricks are paved on the upper surface of the furnace top area.

[0003] Modern coke ovens are developing towards large-scale, and the length from the coke oven machine side to the coke side and the distance from the center line of the carbonization chamber are getting longer and longer. The complex structure of the furnace top area has brought challenges to the sealing of the furnace top area under hot conditions. Because the upper and lower parts of the furnace top area use refractory materials with different expansion coefficients, there is an expansion difference in the furnace top area.

[0004] The Chinese patent application with application publication number CN102146294A discloses "a method for improving the air tightness of the coke oven roof and a roof structure". The coke oven roof is divided into two parts, the upper part of the roof and the lower part of the roof. The upper part of the roof and the lower part of the roof are built as independent entities, and a sliding layer is arranged between the upper part of the roof and the lower part of the roof. When the oven is baked, after the upper part of the roof and the lower part of the roof have expanded, grouting is performed through the grouting holes in the upper part of the roof to fill the gaps in the upper part of the roof and the gaps between the lower part of the roof and the large protective plate, so as to prevent leakage between adjacent carbonization chambers and ensure the airtightness of the coke oven. It can effectively solve the problem that the upper part of the roof is damaged by the expansion of the lower part of the roof due to uneven expansion of the upper part and the lower part of the roof of the coke oven. However, the grouting of the furnace head can only improve the sealing of the furnace head part (mainly between the furnace head refractory and the furnace head protective plate), and the overall sealing of the coke oven roof area still needs to be strengthened. Summary of the invention

[0005] The present invention provides a coke oven roof structure, which can ensure the tightness of the coke oven roof during the overall expansion process through the mutual interlocking structure between upper masonry bodies and lower masonry bodies; grouting through the reserved middle grouting hole after the oven is baked can effectively reduce the raw gas leakage rate of the entire coke oven roof area during the production process.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A coke oven roof structure, the coke oven roof area comprises an upper masonry, a lower masonry and a sliding layer arranged between the upper masonry and the lower masonry; along the machine side-coke side direction, the furnace roof area is provided with a plurality of fire viewing holes above the corresponding combustion chamber, a plurality of coal loading holes / smoke guide holes are arranged above the corresponding carbonization chamber, and a riser hole and a furnace head grouting hole are arranged at the furnace head position; the furnace roof area is also provided with a plurality of middle grouting holes, the middle grouting holes comprise a middle grouting hole 1 arranged outside the four corners of the coal loading hole / smoke guide hole, and a middle grouting hole 2 arranged between two adjacent coal loading hole / smoke guide holes, the middle grouting hole 2 is arranged on both sides of the fire viewing hole brick, and are respectively arranged in a row with the middle grouting hole 1 on the corresponding side.

[0008] The masonry of the furnace top area above the combustion chamber is a fire viewing hole wall, and the upper masonry of the fire viewing hole wall is composed of clay bricks, and the lower masonry is composed of silica bricks.

[0009] The burner head grouting hole is arranged on the extension line of the center line of the fire viewing hole, and the cross section of the burner head grouting hole is rectangular, which is formed by connecting the holes arranged in the middle of the multi-layer burner head bricks.

[0010] The cross section of the middle grouting hole is rectangular and is formed by laying multiple layers of special-shaped bricks.

[0011] The refractory bricks constituting the upper masonry are connected by a bite structure, and the refractory bricks constituting the lower masonry are connected by a bite structure; the bottom surface of the upper masonry and the top surface of the lower masonry in contact with the sliding layer are both flat.

[0012] There is a height difference between each layer of refractory bricks constituting the fire viewing hole wall and other refractory bricks in the same layer, and each layer of refractory bricks constituting the fire viewing hole wall is lower than other refractory bricks in the same layer.

[0013] There is a height difference between the sliding layer at the wall portion corresponding to the fire viewing hole and the sliding layers at other portions, and the sliding layer at the wall portion corresponding to the fire viewing hole is lower than the sliding layers at other portions.

[0014] The sliding layer consists of an aluminum foil, a graphite-glycerin mixture, and an aluminum foil which are arranged in sequence from top to bottom.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) The interlocking structure between the upper masonry and the lower masonry can ensure the tightness of the coke oven roof during the overall expansion process;

[0017] 2) After the oven is baked, grouting is performed through the reserved middle grouting hole, which can effectively reduce the raw gas leakage rate in the entire top area of ​​the coke oven during the production process;

[0018] 3) The upper and lower masonry of the furnace roof are made of different refractory materials, which can slide relative to each other during the heating process of the coke oven. The sliding layer can effectively improve the sealing after thermal expansion;

[0019] 4) There is a height difference between the multi-layer refractory bricks constituting the fire hole wall and the sliding layer at the corresponding position and the same layer of refractory bricks or sliding layers at other positions, which can effectively prevent the raw coal gas in the carbonization chamber from leaking into the combustion chamber through the coal loading hole / smoke guide hole during the production process, thereby ensuring the overall tightness of the coke oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of the coke oven roof structure of the present invention ( Figure 2 AA view in .

[0021] Figure 2 yes Figure 1 BB view in.

[0022] Figure 3 yes Figure 1 The CC view in .

[0023] Figure 4 yes Figure 1 DD view in .

[0024] In the figure: 1. Coal loading hole / smoke guide hole 2. Fire viewing hole 3. Riser hole 4. Burner head grouting hole 5. Middle grouting hole 6. Upper masonry 7. Lower masonry 8. Sliding layer DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0026] like Figure 1-Figure 4 As shown, a coke oven roof structure described in the present invention comprises an upper masonry 6, a lower masonry 7 and a sliding layer 8 arranged between the upper masonry 6 and the lower masonry 7; along the machine side-coke side direction, a plurality of fire viewing holes 2 are arranged above the corresponding combustion chamber in the furnace roof area, a plurality of coal loading holes / smoke guide holes 1 are arranged above the corresponding carbonization chamber, and a riser hole 3 and a furnace head grouting hole 4 are arranged at the furnace head position; a plurality of middle grouting holes 5 are also arranged at the furnace roof area, and the middle grouting holes 5 include a middle grouting hole 1 arranged at the outer sides of the four corners of the coal loading hole / smoke guide hole 1, and a middle grouting hole 2 arranged between two adjacent coal loading / smoke guide holes 1, and the middle grouting hole 2 is arranged on both sides of the fire viewing hole bricks, and are respectively arranged in a row with the middle grouting hole 1 on the corresponding side.

[0027] The masonry of the furnace top area above the combustion chamber is a fire viewing hole wall, and the upper masonry of the fire viewing hole wall is composed of clay bricks, and the lower masonry is composed of silica bricks.

[0028] The burner head grouting hole 4 is arranged on the extension line of the center line of the fire viewing hole 2. The cross section of the burner head grouting hole 4 is rectangular, and is formed by connecting the holes arranged in the middle of the multi-layer burner head bricks.

[0029] The cross section of the middle grouting hole 5 is rectangular and is formed by laying multiple layers of special-shaped bricks.

[0030] The refractory bricks constituting the upper masonry 6 are connected by a bite structure, and the refractory bricks constituting the lower masonry 7 are connected by a bite structure; the bottom surface of the upper masonry 6 and the top surface of the lower masonry 7 in contact with the sliding layer 8 are both flat.

[0031] There is a height difference between each layer of refractory bricks constituting the fire viewing hole wall and other refractory bricks in the same layer, and each layer of refractory bricks constituting the fire viewing hole wall is lower than other refractory bricks in the same layer.

[0032] There is a height difference between the sliding layer at the wall portion corresponding to the fire viewing hole and the sliding layers at other portions, and the sliding layer at the wall portion corresponding to the fire viewing hole is lower than the sliding layers at other portions.

[0033] The sliding layer 8 is composed of aluminum foil, graphite glycerin mixture, and aluminum foil which are arranged in sequence from top to bottom.

[0034] The coke oven roof structure described in the present invention comprises an upper masonry 6 and a lower masonry 7. A sliding layer 8 is provided between the upper masonry 6 and the lower masonry 7. The upper masonry 6 and the lower masonry 7 corresponding to the fire viewing hole wall are made of different refractory materials. A plurality of coal loading holes / smoke guide holes 1 are provided in the furnace roof area, a riser hole 3 and a furnace head grouting hole 4 are provided in the furnace head area, and a plurality of middle grouting holes 5 are also provided along the longitudinal direction of the coke oven.

[0035] The sliding layer 8 divides the fire viewing hole wall into two parts, an upper part and a lower part. The refractory material of the part below the sliding layer 8 is made of silicon bricks, and the refractory material of the part above the sliding layer 8 is made of clay bricks.

[0036] The opening shape of the middle grouting hole 5 is a rectangle, which is formed by laying special-shaped bricks; the furnace head grouting hole 4 is a hole opened inside the furnace head brick, and the opening shape is a rectangle.

[0037] A plurality of fire hole bricks are arranged at a certain interval on the fire hole wall, and a fire hole 2 is arranged in the middle of the fire hole brick; in the upper masonry 6 or the lower masonry 7, the upper and lower surfaces of the fire hole bricks are respectively provided with grooves and protrusions to form a mutually interlocking structure, and each layer of fire hole bricks has a certain height difference with other refractory bricks in the same layer, and the lower surface of the fire hole bricks in the lowest layer of the upper masonry 6 and the upper surface of the fire hole bricks in the upper layer of the lower masonry (i.e., the surface in contact with the sliding layer 8) are both planes.

[0038] The sliding layer 8 arranged between the upper masonry 6 and the lower masonry 7 is composed of aluminum foil, graphite glycerin mixture, and aluminum foil, replacing the traditional mortar.

[0039] Each layer of refractory bricks of the coal loading hole / smoke guiding hole 1 is sealed and connected by a bite structure.

[0040] The middle grouting hole 5 is located on both sides of the fire viewing hole brick. During the construction of the coke oven roof, the refractory bricks at the corresponding position are processed in advance to reserve the opening of the middle grouting hole (i.e., special-shaped refractory bricks). The middle grouting hole 5 extends from the furnace roof cylinder brick all the way down to the sliding layer 8. When the oven is baked to a certain degree, the middle grouting hole 5 is poured with fire mud, and the furnace roof cylinder bricks are laid after pouring. The grouting operation of the middle grouting hole 5 can improve the cracking of the mortar joints caused by the inconsistent expansion of the upper masonry 6 and the lower masonry 7 after the coke oven is heated, and the resulting poor sealing problem, and at the same time, can seal the masonry around the coal loading hole / smoke guide hole 1.

[0041] 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 roof structure, wherein the roof area of ​​the coke oven comprises an upper masonry, a lower masonry and a sliding layer arranged between the upper masonry and the lower masonry; along the machine side-coke side direction, the roof area is provided with a plurality of fire viewing holes above the corresponding combustion chamber, a plurality of coal loading holes / smoke guide holes are provided above the corresponding carbonization chamber, and a riser hole and a furnace head grouting hole are provided at the furnace head position; characterized in that: The furnace top area is also provided with a plurality of middle grouting holes, including middle grouting holes 1 arranged on the outside of the four corners of the coal loading hole / smoke guiding hole, and middle grouting holes 2 arranged between two adjacent coal loading / smoke guiding holes, and middle grouting holes 2 are arranged on both sides of the fire viewing hole bricks, and are arranged in a row with the middle grouting holes 1 on the corresponding side; the refractory bricks constituting the upper masonry are connected by a bite structure, and the refractory bricks constituting the lower masonry are connected by a bite structure; the bottom surface of the upper masonry and the top surface of the lower masonry in contact with the sliding layer are both planes; there is a height difference between each layer of refractory bricks constituting the fire viewing hole wall and other refractory bricks of the same layer, and each layer of refractory bricks constituting the fire viewing hole wall is lower than other refractory bricks of the same layer; there is a height difference between the sliding layer corresponding to the fire viewing hole wall and the sliding layers of other parts, and the sliding layer corresponding to the fire viewing hole wall is lower than the sliding layers of other parts; the sliding layer is composed of aluminum foil, graphite glycerin mixture and aluminum foil arranged in sequence from top to bottom.

2. A coke oven roof structure according to claim 1, characterized in that: The masonry of the furnace top area above the combustion chamber is a fire viewing hole wall, and the upper masonry of the fire viewing hole wall is composed of clay bricks, and the lower masonry is composed of silica bricks.

3. A coke oven roof structure according to claim 1, characterized in that: The burner head grouting hole is arranged on the extension line of the center line of the fire viewing hole, and the cross section of the burner head grouting hole is rectangular, which is formed by connecting the holes arranged in the middle of the multi-layer burner head bricks.

4. A coke oven roof structure according to claim 1, characterized in that: The cross section of the middle grouting hole is rectangular and is formed by laying multiple layers of special-shaped bricks.

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