CN218842042U - Furnace top structure of large-volume coke oven - Google Patents
Furnace top structure of large-volume coke oven Download PDFInfo
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- CN218842042U CN218842042U CN202223468394.2U CN202223468394U CN218842042U CN 218842042 U CN218842042 U CN 218842042U CN 202223468394 U CN202223468394 U CN 202223468394U CN 218842042 U CN218842042 U CN 218842042U
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- coal charging
- charging hole
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model relates to a furnace top structure of a large-volume coke oven, the elevation of the bottom surface of a top brick striding through a coal charging hole and an ascending pipe hole is higher than the elevation of the bottom surface of the top brick striding through the coal charging hole and the coal charging hole, the elevation of the bottom surface of the top brick striding through the coal charging hole and the coal charging hole is consistent with the elevation of the bottom surface of a furnace top area, and a crude gas derivation channel is formed between the bottom surface of the top brick striding through the coal charging hole and the ascending pipe hole and the bottom surface of the furnace top area. The utility model increases the cross section of the airflow channel between the bottom surface of the roof brick and the bottom surface of the furnace top area, reduces the airflow resistance in the stage of leading out the crude gas, and can better adapt to the change caused by the structural size of the carbonization chamber of the large-scale coke furnace; the sliding layer is sprayed with the heat insulation spray coating, so that the dissipation of heat in the furnace top area is effectively reduced, and the thermal efficiency of the coke oven is favorably improved.
Description
Technical Field
The utility model relates to a coke oven technical field especially relates to a furnace roof structure of big volume coke oven.
Background
The furnace top area refers to the area of the top of the coke oven above a coke oven carbonization chamber and a combustion chamber, and the furnace top area is provided with a coal loading hole/smoke guide hole, an ascending pipe, a fire observation hole, a furnace drying hole, a transverse and longitudinal stay bar groove, a furnace top cart foundation and other structures.
The furnace roof area is a transition area between the high-temperature combustion area and the atmosphere, the area causes the expansion of upper and lower brickworks to be uneven because of the temperature gradient is great, the condition that the coke oven is damaged because the upper part of the furnace roof is jointly expanded by the lower part of the furnace roof in the process of baking the furnace often appears, and simultaneously, because the furnace roof is pulled open along with the combustion chamber, the face brick at the furnace roof is easy to be torn or even damaged. The patent of chinese utility model with the publication number of CN 202016977U discloses a "coke oven roof structure" which divides the top of the coke oven into two parts, namely, an upper part and a lower part, and a sliding layer is provided between the upper part and the lower part, thus effectively solving the above problems.
In recent years, as coke ovens have been made larger, the length of the coke oven side-coke side direction and the distance between the center lines of adjacent coking chambers have become larger, and such large ovens are called large-capacity ovens. The coking chamber of the coke oven has large coal charging amount, but more coal charging amount will inevitably generate more raw coke oven gas and smoke dust, when the circulation space of the coal charging hole at the top of the coke oven can not meet the pressure requirement of the top of the coke oven during the production of the coke oven, the smoke dust can escape seriously, even the top of the coke oven will smoke and fire, which causes environmental pollution and potential safety hazard, and also seriously worsens the environment of the operation area at the top of the coke oven. The Chinese patent application with the application publication number of CN 112574761A discloses 'a coke oven roof structure for realizing smokeless coal charging', wherein the coal charging hole/smoke guide hole is formed by sequentially connecting a circular hole section I, an upper conical hole section and a lower conical hole section from top to bottom; the taper of the lower taper hole section is larger than that of the upper taper hole section; by increasing the airflow circulation area of the coal charging hole/smoke guide hole and the ascending pipe hole, the system resistance of gas circulation is reduced, the collection efficiency of the ascending pipe and the coal charging hole/smoke guide hole on raw coke oven gas and smoke dust is effectively improved, the pollution source is reduced, and the emission of harmful gas is reduced. However, for a large-volume coke oven, because the generation amount of the raw coke oven gas is further increased, the requirement of rapidly leading out the raw coke oven gas cannot be met by adopting the structure.
Disclosure of Invention
The utility model provides a furnace top structure of a large-volume coke oven, the elevation of the bottom surface of a coal charging hole-riser hole spanning the top brick is higher than the elevation of the bottom surface of the coal charging hole-coal charging hole spanning the top brick, the cross section of an airflow channel between the bottom surface of the coal charging hole-riser hole spanning the top brick and the bottom surface of a furnace top area is increased, the airflow resistance in a crude gas leading-out stage is reduced, and the furnace top structure can better adapt to the change brought by the structural size of a carbonization chamber of a large-scale coke oven; the sliding layer is sprayed with the heat insulation spray coating, so that the dissipation of heat in the furnace top area is effectively reduced, and the thermal efficiency of the coke oven is favorably improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the furnace top structure of the large-volume coke oven comprises a furnace top area arranged at the top of the coke oven; a plurality of observation holes are arranged in the furnace top area above the corresponding combustion chamber, and a plurality of coal charging holes and a plurality of ascending pipe holes are arranged in the furnace top area above the corresponding carbonization chamber; the top of the combustion chamber and the top of the carbonization chamber are both provided with a roof spanning brick; wherein, the cross-top brick between the adjacent 2 coal charging holes is a coal charging hole-coal charging hole cross-top brick, and the cross-top brick between the coal charging hole and the adjacent riser hole is a coal charging hole-riser hole cross-top brick; the elevation of the bottom surface of the coal charging hole-ascending pipe hole cross-top brick is higher than that of the bottom surface of the coal charging hole-coal charging hole cross-top brick, the elevation of the bottom surface of the coal charging hole-coal charging hole cross-top brick is consistent with that of the bottom surface of the furnace top area, and a raw gas guiding channel is formed between the bottom surface of the coal charging hole-ascending pipe hole cross-top brick and the bottom surface of the furnace top area.
The coal charging hole is a trumpet-shaped pore passage and is divided into a straight cylinder section, a bell mouth upper conical section and a bell mouth lower conical section from top to bottom, wherein the conical angle of the bell mouth lower conical section is larger than that of the bell mouth upper conical section.
The coal charging hole is formed by building multiple layers of brickworks, and every two adjacent 2 layers of brickworks are connected in a sealing mode through an occlusion structure.
The furnace top zone consists of an upper furnace top zone and a lower furnace top zone, and a sliding layer is arranged between the upper furnace top zone and the lower furnace top zone.
And spraying heat-insulating spray paint on one side or both sides of the sliding layer.
The heat-insulating spray coating is an inorganic heat-insulating coating, the heat conductivity coefficient is 0.020-0.110W/m.K, and the heat-resisting temperature is-15-1800 ℃.
The upper surface of the furnace top area is an inclined plane, and the upper surface of the furnace top area corresponding to the center of the coke oven is higher than the upper surfaces of the furnace top areas corresponding to the two sides of the machine coke of the coke oven.
Compared with the prior art, the beneficial effects of the utility model are that:
1) By raising the elevation of the coal charging hole-riser hole across the bottom surface of the top brick, the cross-sectional area of an airflow channel between the bottom surface of the top brick and the bottom surface of the top area of the furnace is increased, the raw gas guiding resistance is reduced, the change caused by the structural size of a carbonization chamber of a large-scale coke furnace can be better adapted, and the influence of the raw gas guiding resistance increase caused by uneven distribution of coal materials and increase of the raw gas amount on the coke furnace production is reduced;
2) The sliding layer of the furnace top area is sprayed with heat-insulating spray paint on one side or two sides, so that the dissipation of heat in the furnace top area can be effectively reduced, and the thermal efficiency of the coke oven is improved;
3) The opening angle of the lower cone section of the bell mouth of the coal charging hole is larger than that of the upper cone section of the bell mouth, so that a raw coke oven gas circulation channel can be prevented from being blocked due to the fact that the top angle of the coal is too high after the coal is discharged, and adverse effects on the raw coke oven gas leading-out process are avoided.
Drawings
Fig. 1 isbase:Sub>A front view (base:Sub>A-base:Sub>A cross-sectional view in fig. 2) ofbase:Sub>A roof structure ofbase:Sub>A large capacity coke oven according to the present invention.
Fig. 2 is a sectional view taken along line B-B of fig. 1.
Fig. 3 is a cross-sectional view C-C in fig. 1.
Fig. 4 is a cross-sectional view taken along line D-D in fig. 2.
Fig. 5 is a cross-sectional view E-E of fig. 4.
In the figure: 1. coal charging hole 2, fire observation hole 3, ascending pipe hole 4, coal charging hole-coal charging hole cross-top brick 5, coal charging hole-ascending pipe hole cross-top brick 6, upper furnace top area 7, lower furnace top area 8, sliding layer 9, coke oven center 10, bell mouth lower conical section 11, bell mouth upper conical section 12, raw gas export channel 13, upper surface of furnace top area
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, the top structure of a large-capacity coke oven of the present invention comprises a top area arranged on the top of the coke oven; a plurality of observation holes 2 are arranged in the furnace top area above the corresponding combustion chamber, and a plurality of coal charging holes 1 and a plurality of ascending pipe holes 3 are arranged in the furnace top area above the corresponding carbonization chamber; the top of the combustion chamber and the top of the carbonization chamber are both provided with a roof-spanning brick; wherein, the cross-top brick between the adjacent 2 coal charging holes 1 is a coal charging hole-coal charging hole cross-top brick 4, and the cross-top brick between the coal charging hole 1 and the adjacent riser hole 3 is a coal charging hole-riser hole cross-top brick 5; the elevation of the bottom surface of the coal charging hole-ascending pipe hole cross-top brick 5 is higher than that of the bottom surface of the coal charging hole-coal charging hole cross-top brick 4, the elevation of the bottom surface of the coal charging hole-coal charging hole cross-top brick 4 is consistent with that of the bottom surface of the furnace top area, and a raw gas lead-out channel 12 is formed between the bottom surface of the coal charging hole-ascending pipe hole cross-top brick 5 and the bottom surface of the furnace top area.
The coal charging hole 1 is a trumpet-shaped pore passage and is divided into a straight cylinder section, a bell mouth upper conical section 11 and a bell mouth lower conical section 10 from top to bottom, wherein the conical angle of the bell mouth lower conical section 10 is larger than that of the bell mouth upper conical section 11.
The coal charging hole 1 is formed by building multiple layers of brickworks, and the adjacent 2 layers of brickworks are connected in a sealing mode through an occlusion structure.
The furnace top area consists of an upper furnace top area 6 and a lower furnace top area 7, and a sliding layer 8 is arranged between the upper furnace top area 6 and the lower furnace top area 7.
And the sliding layer 8 is sprayed with heat-insulating spray paint on one side or two sides.
The heat-insulating spray coating is an inorganic heat-insulating coating, the heat conductivity coefficient is 0.020-0.110W/m.K, and the heat-resisting temperature is-15-1800 ℃.
The upper surface 13 of the furnace top area is an inclined plane, and the upper surface of the furnace top area corresponding to the center 9 of the coke oven is higher than the upper surfaces of the furnace top areas corresponding to the two sides of the machine coke of the coke oven.
The utility model relates to a furnace top structure of a large-capacity coke oven, a plurality of coal charging holes 1 and ascending pipe holes 3 are arranged in a furnace top area above a carbonization chamber, and the elevation of the bottom surface of a top brick 5 striding through the coal charging holes and the ascending pipe holes is higher than the elevation of the bottom surface of the top brick striding through the coal charging holes and the coal charging holes 4. As the coal loading of the large-volume coke oven is obviously increased compared with the conventional coke oven, the yield of the raw coke oven gas is higher. By adopting the structure, the gas circulation space at the top of the carbonization chamber can be effectively increased, and the crude gas guiding resistance at the top of the carbonization chamber is reduced. Meanwhile, because the span between the coal charging holes 1 is enlarged, a higher coal sharp corner can be formed at the top of the coal charge after the coal is charged, the lower conical section 10 of the bell mouth of the coal charging hole 1 has a larger opening angle than the upper conical section 11 of the bell mouth, the space between the bottom of the coal sharp corner and the lower conical section 10 of the bell mouth can be increased, and the smooth export of the raw coke oven gas is ensured.
The structure of the furnace top area of the large-volume coke oven is similar to that of the furnace top area of a conventional coke oven, namely, the furnace top area above the corresponding carbonization chamber is provided with a plurality of coal charging holes 1 and ascending pipe holes 3 along the transverse direction of the coke oven, and the furnace top area above the corresponding combustion chamber is provided with a plurality of observation holes 2 along the transverse direction of the coke oven. The whole furnace top area is further divided into an upper furnace top area 6 and a lower furnace top area 7, and a sliding layer 8 is arranged between the upper furnace top area 6 and the lower furnace top area 7.
The top area of the furnace is arranged above the carbonization chamber and the combustion chamber through a top spanning brick seat, the top spanning brick comprises a coal charging hole-coal charging hole top spanning brick 4 and a coal charging hole-ascending pipe hole top spanning brick 5, the bottom surface of the coal charging hole-coal charging hole top spanning brick 4 is flush with the bottom surface of the top area of the furnace, the elevation of the bottom surface of the coal charging hole-ascending pipe hole top spanning brick 5 is higher than that of the bottom surface of the coal charging hole-coal charging hole top spanning brick 4, namely the elevation of the bottom surface of the top area of the furnace, and a raw gas derivation channel 12 is formed between the coal charging hole-ascending pipe hole top spanning brick 5 and the bottom surface of the top area of the furnace.
Coal charging hole 1 includes straight section of thick bamboo, horn mouth upper cone section 11 and horn mouth lower cone section 10, and the opening angle of horn mouth lower cone section 10 is greater than the opening angle of horn mouth upper cone section 11, forms in coal charging hole 1's the multilayer brickwork, through interlock structure sealing connection between the adjacent 2 layers of brickwork to increase the overall stability of coal charging hole 1 department brickwork.
The upper surface of the roof section has a certain slope and is highest at the centre 9 of the coke oven.
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 (7)
1. The furnace top structure of the large-volume coke oven comprises a furnace top area arranged at the top of the coke oven; a plurality of observation holes are arranged in the furnace top area above the corresponding combustion chamber, and a plurality of coal charging holes and a plurality of ascending pipe holes are arranged in the furnace top area above the corresponding carbonization chamber; the top of the combustion chamber and the top of the carbonization chamber are both provided with a roof spanning brick; wherein, the cross-top brick between the adjacent 2 coal charging holes is a coal charging hole-coal charging hole cross-top brick, and the cross-top brick between the coal charging hole and the adjacent riser hole is a coal charging hole-riser hole cross-top brick; the device is characterized in that the elevation of the bottom surface of the coal charging hole-ascending pipe hole cross-top brick is higher than that of the bottom surface of the coal charging hole-coal charging hole cross-top brick, the elevation of the bottom surface of the coal charging hole-coal charging hole cross-top brick is consistent with that of the bottom surface of the furnace top area, and a raw gas guiding channel is formed between the bottom surface of the coal charging hole-ascending pipe hole cross-top brick and the bottom surface of the furnace top area.
2. The roof structure of a large-capacity coke oven according to claim 1, wherein the coal charging hole is a trumpet-shaped tunnel and is divided into a straight cylinder section, a trumpet-shaped upper cone section and a trumpet-shaped lower cone section from top to bottom, wherein the cone angle of the trumpet-shaped lower cone section is larger than that of the trumpet-shaped upper cone section.
3. The roof structure of a large-capacity coke oven according to claim 1, wherein the coal charging hole is formed by building multiple layers of brickworks, and the adjacent 2 layers of brickworks are connected with each other in a sealing manner through a meshing structure.
4. The roof structure of a large-capacity coke oven according to claim 1, wherein the roof section is composed of an upper roof section and a lower roof section, and a sliding layer is provided between the upper roof section and the lower roof section.
5. The roof structure of a large-capacity coke oven according to claim 4, wherein the sliding layer is sprayed with heat-insulating spray paint on one side or both sides.
6. The roof structure of a large-capacity coke oven according to claim 5, wherein the thermal insulation spray coating is an inorganic thermal insulation coating, the thermal conductivity is 0.020-0.110W/m.K, and the heat-resistant temperature is-15 ℃ to 1800 ℃.
7. The roof structure of a large-capacity coke oven according to claim 1, wherein the upper surface of the roof region is an inclined surface, and the upper surface of the roof region corresponding to the center of the coke oven is higher than the upper surfaces of the roof regions corresponding to both sides of the machine coke of the coke oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223468394.2U CN218842042U (en) | 2022-12-26 | 2022-12-26 | Furnace top structure of large-volume coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223468394.2U CN218842042U (en) | 2022-12-26 | 2022-12-26 | Furnace top structure of large-volume coke oven |
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| Publication Number | Publication Date |
|---|---|
| CN218842042U true CN218842042U (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223468394.2U Active CN218842042U (en) | 2022-12-26 | 2022-12-26 | Furnace top structure of large-volume coke oven |
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| CN (1) | CN218842042U (en) |
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- 2022-12-26 CN CN202223468394.2U patent/CN218842042U/en active Active
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