CN115707757B - Ceramic repair welding method for deep vertical flame path furnace wall of coke oven carbonization chamber - Google Patents
Ceramic repair welding method for deep vertical flame path furnace wall of coke oven carbonization chamber Download PDFInfo
- Publication number
- CN115707757B CN115707757B CN202110948148.8A CN202110948148A CN115707757B CN 115707757 B CN115707757 B CN 115707757B CN 202110948148 A CN202110948148 A CN 202110948148A CN 115707757 B CN115707757 B CN 115707757B
- Authority
- CN
- China
- Prior art keywords
- furnace wall
- ceramic
- carbonization chamber
- vertical flame
- furnace
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 179
- 230000008439 repair process Effects 0.000 title claims abstract description 137
- 239000000571 coke Substances 0.000 title claims abstract description 127
- 238000003466 welding Methods 0.000 title claims abstract description 127
- 238000003763 carbonization Methods 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000009413 insulation Methods 0.000 claims abstract description 100
- 239000000835 fiber Substances 0.000 claims abstract description 79
- 238000004321 preservation Methods 0.000 claims abstract description 69
- 238000009423 ventilation Methods 0.000 claims abstract description 29
- 239000011449 brick Substances 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000010926 purge Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 115
- 229910052742 iron Inorganic materials 0.000 claims description 54
- 238000002156 mixing Methods 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 33
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 29
- 239000001301 oxygen Substances 0.000 claims description 29
- 229910052760 oxygen Inorganic materials 0.000 claims description 29
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 229910052726 zirconium Inorganic materials 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000003245 coal Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- 229910002076 stabilized zirconia Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 13
- 239000010439 graphite Substances 0.000 abstract description 13
- 238000004939 coking Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 description 44
- 239000002893 slag Substances 0.000 description 31
- 230000000694 effects Effects 0.000 description 21
- 238000012423 maintenance Methods 0.000 description 18
- 210000003128 head Anatomy 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 229910052782 aluminium Inorganic materials 0.000 description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 16
- 238000011068 loading method Methods 0.000 description 15
- 239000007921 spray Substances 0.000 description 15
- 208000003251 Pruritus Diseases 0.000 description 14
- 238000001816 cooling Methods 0.000 description 13
- 239000007789 gas Substances 0.000 description 13
- 230000007803 itching Effects 0.000 description 12
- 230000005855 radiation Effects 0.000 description 12
- 208000002193 Pain Diseases 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 11
- 230000036541 health Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 239000000945 filler Substances 0.000 description 6
- 230000003137 locomotive effect Effects 0.000 description 6
- 230000008520 organization Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000005476 soldering Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011331 needle coke Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 231100000817 safety factor Toxicity 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method for repairing ceramic of a furnace wall of a vertical flame path at the deep part of a coking chamber of a coke oven, which comprises the following steps: pushing out the coke in the carbonization chamber; manufacturing a heat preservation and insulation device according to the width of the coke oven carbonization chamber; the furnace door frame and the non-overhauling part at the upper part of the heat preservation and insulation device and the exposed furnace wall are all insulated by adopting a ceramic fiber blanket; opening a ventilation device of the heat preservation and insulation device, and enabling constructors to enter the heat preservation and insulation device to clean residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber; purging the cleaned furnace wall, and then performing deep vertical flame path ceramic repair welding; removing and taking out the heat preservation and insulation device after the ceramic is welded and repaired on the furnace wall; the invention ensures that the furnace wall of the deep vertical flame path of the coke oven carbonization chamber can be effectively repaired, is beneficial to improving the temperature of the coke oven, ensures the transverse temperature coefficient, can reduce the heat consumption of the coke oven, reduces the standard vertical flame path temperature, improves the vertical flame path temperature and ensures the coke quality.
Description
Technical Field
The invention relates to the technical field of repairing and sealing of a furnace wall of a coke oven carbonization chamber, in particular to a method for repairing a ceramic wall of a vertical flame path in a deep part of the coke oven carbonization chamber.
Background
In the normal production operation process of the coke oven, along with the increase of the oven age, the temperature change of the oven wall of the coke oven carbonization chamber at the oven end part caused by repeated coal loading and coke pushing operations, the mechanical stress generated during the process of picking and loading the oven door and pushing the coke, the physical and chemical effects cause the oven wall to generate denudation and pitting surfaces, graphite accumulated on the surface of the damaged oven wall generates carburization on the oven wall bricks of the carbonization chamber, the surface of the oven wall is further spalled, and the problems of denudation, pitting surfaces, cracks, blowby, perforation and the like can occur on the oven end wall (the oven end 1-4 vertical flame path and the distance from the oven door 1-2 m) of the coke oven. Furnace wall damage at these locations has been handled through a relatively rich set of techniques and experience over time, and also has relatively good handling results, such as: digging and repairing furnace wall, spraying and repairing by semi-dry method, and welding and repairing ceramic.
But the deep vertical flame paths of the carbonization chambers of the large coke oven and the tamping coke oven gradually have the problems of denudation, pitting surface, cracking, blowby, perforation and the like, each combustion chamber of the large coke oven and the tamping coke oven has 32-36 vertical flame paths, and the distance is 8-9 meters no matter the large coke oven and the tamping coke oven are treated from the machine side or the coke side furthest. Based on the condition that the deep vertical flame path is far away and difficult to cool, the treatment method for solving problems on the furnace wall of the furnace end is adopted, such as: the wet repairing method, the furnace wall repairing method, the semi-dry repairing method, the spraying sealing method and the like have great limitations and cannot be effectively processed. The ceramic welding repair is the only treatment method at present, but a water jacket welding gun is required to be used, the welding repair can be performed by water cooling of the welding gun, and the water jacket welding gun also has the problems and limitations:
1. The water jacket welding gun is used, the depth of the water jacket welding gun is 16-18 vertical flame paths, the depth of the water jacket welding gun is 8-9 meters, and the depth of the water jacket welding gun is at least 2 meters outside the coke oven, so that the welding gun is at least 10-11 meters long, a coke pusher and a coke guide are required to be used for feeding the welding gun into a carbonization chamber on a coke oven machine side and a Jiao Fang walking table, the water jacket welding gun is frequently used, great difficulty is brought to maintenance, and particularly under the condition of full-load production of the coke oven, and the water jacket welding gun cannot be provided with conditions.
2. Cooling water is used, which makes construction difficult.
3. The quality cannot be ensured by using a welding gun with a length of more than 10 meters for remote repair welding.
4. The damaged furnace wall cannot be cleaned by long-distance construction, and repair quality is difficult to ensure.
The analysis shows that the machine and Jiao Fangtan chamber furnace wall can not be subjected to ceramic repair welding of the deep vertical flame path furnace wall by using a water jacket long welding gun in principle due to the limit of maintenance time and site space and the consideration of construction efficiency and construction safety factors. The long welding gun of the water jacket is inconvenient to move, so that the long welding gun of the water jacket cannot avoid the locomotive in time, and the normal production organization of the coke oven cannot meet the requirement of overhauling and using the long welding gun of the water jacket. Thus, there is currently no way for deep flame paths to be efficiently handled.
Disclosure of Invention
The invention aims to provide a method for repairing ceramic of a deep vertical flame path furnace wall of a coke oven carbonization chamber, which solves the problems in the prior art, ensures that the deep vertical flame path furnace wall of the coke oven carbonization chamber can be effectively repaired, is beneficial to improving the temperature of the coke oven, ensures the transverse temperature coefficient, can reduce the heat consumption of the coke oven, reduces the standard vertical flame path temperature, improves the vertical flame path temperature and ensures the quality of coke.
In order to achieve the above object, the present invention provides the following solutions:
The invention provides a method for repairing ceramic of a furnace wall of a deep vertical flame path of a coke oven carbonization chamber, which comprises the following steps:
Pushing out coke in the carbonization chamber to ensure that the coke is in an empty furnace state before repair welding; when ceramic repair welding is carried out on the vertical flame path furnace wall of the machine side or Jiao Fangshen parts, constructors enter the carbonization chamber to carry out ceramic repair welding construction, so that the construction quality can be ensured by short-distance repair welding, the forward and backward directions of the coke oven locomotive are not influenced, and the maintenance time is not required to be provided independently;
Step two, manufacturing a heat preservation and insulation device which can be rapidly pushed into the carbonization chamber and rapidly taken out according to the specific condition of the width of the carbonization chamber of the coke oven; the iron cage is manufactured according to the specific condition of the width of the coke oven carbonization chamber, so that the installation and the disassembly are convenient, and meanwhile, the heat preservation and heat insulation effects and the construction can be ensured. The iron cages are 2m long and 1.9 m high under the general condition, the width is determined according to the width of the carbonization chamber, and the iron cages can be quickly pushed into the carbonization chamber and quickly taken out, so that the construction is convenient and quick, and 6 groups of iron cages are needed at most; the ceramic welding repair deep vertical fire path furnace wall needs to adopt a heat preservation and insulation device with characteristics of China, and the heat preservation and insulation device adopts a zirconium-containing ceramic fiber blanket for heat insulation. Because the common ceramic fiber blanket contains a large number of slag balls and short fibers, the content of the common ceramic fiber slag balls is about 20 percent, the ceramic fibers are slender by 4.5 mu m, the space in the heat preservation and insulation device is narrow during construction, constructors need to work by attaching the ceramic fiber blanket, a large number of slag balls and fibers are attached to the constructors, skin itching, stinging and other conditions are caused, the cleaning is difficult, the health of the staff is harmful, and the operation requirement cannot be met. The zirconium-containing ceramic fiber blanket used by us has low slag ball content, generally less than or equal to 12 percent, the zirconium-containing ceramic fiber has slender length of 4 mu m, good toughness and high strength, and the staff can not feel itching, stinging and other problems after practical use;
Thirdly, the furnace door frame at the upper part of the heat preservation and heat insulation device is heat-insulated by adopting a ceramic fiber blanket, a hanging heat insulation curtain mode cannot be adopted for heat insulation, the heat insulation curtain has poor sealing effect, the furnace wall is damaged at a too high cooling speed, in addition, the two sides of the heat insulation curtain are not sealed, the protection plate and the furnace door frame are easy to burn out due to high-temperature radiation of the carbonization chamber, the furnace iron part is seriously deformed, and the non-overhauling part and the exposed furnace wall are heat-insulated by adopting the ceramic fiber blanket, so that the heat insulation thickness is 40-50mm;
Step four, a ventilation device of the heat preservation and insulation device is opened, constructors enter the heat preservation and insulation device, and residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber are cleaned; the ventilating device comprises a ventilating pipeline, each section of the ventilating pipeline is about 2.2m long and slightly longer than the length of each section of heat preservation and heat insulation device, so that the ventilating device is convenient to splice and install, and at most 6 sections are needed. The head of the first section of pipeline is provided with a special spray head of my department as an air outlet, an air outlet of the spray head is aligned to the upper part of constructors during installation, compressed air is introduced during construction, and air is blown to the constructors. Compressed air is sprayed out through the spray head, a rotary air flow is formed at the head and the upper part of the body of a constructor, the air flow distribution range is more proper and uniform, the influence of hot air flow and heat radiation on the body of the constructor can be effectively isolated, the constructor is cooled more effectively, and meanwhile, the constructor is guaranteed to have sufficient oxygen supply;
And fifthly, purging the cleaned furnace wall with compressed air, and cleaning residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber before each ceramic repair welding so as to ensure good combination of ceramic repair welding materials and brick surfaces. After the vibration hammer cleans the surface of the furnace wall of the carbonization chamber, the cleaned furnace wall is purged by compressed air, and then the deep vertical flame path ceramic repair welding is carried out. The compressed air cannot purge the furnace wall for a long time so as to avoid secondary damage of the furnace wall caused by too fast local temperature reduction; then, performing ceramic repair welding on the deep vertical flame path, wherein the temperature of the furnace wall of the carbonization chamber is ensured to be maintained in the ceramic repair welding operation process, the temperature of the furnace wall of a repair area is more than or equal to 700 ℃, the temperature of the furnace wall of a non-repair area is more than or equal to 900 ℃, if the temperature of the furnace wall is lower than the set temperature, heating the furnace wall firstly, and then performing ceramic repair welding;
step six, dismantling and taking out the heat preservation and insulation device after the ceramic is welded and repaired on the furnace wall; heating the furnace wall of the carbonization chamber after the furnace wall is welded and repaired by ceramic, and periodically measuring and adjusting the pressure of the furnace protection iron piece spring in the heating process; and (5) loading coal after the standard vertical flame path temperature reaches the standard, observing the condition of ignition and blowby of the vertical flame paths of the combustion chambers at the two sides of the carbonization chamber after the coal is loaded, and if the problem exists, timely processing.
The ceramic welding repair furnace number must be subjected to cooling control: ① The check and repair furnace number is an empty furnace, and if the blast furnace gas is burned in the combustion chambers at the two sides of the check and repair furnace number, the coke oven gas is converted so as to facilitate the temperature control of the check and repair furnace number; ② The vertical flame paths of the combustion chambers at the two sides of the checking and repairing furnace number stop heating during the checking and repairing period, and the temperature of the vertical flame paths of the furnace heads at the machine coke side is controlled to be not lower than 900 ℃. If the temperature is lower than the target value, the cock is started and the temperature is raised; ③ The adjacent carbonization chambers on the two sides of the inspection and repair furnace number do not push coke during the maintenance period, the coking time is prolonged, and the temperature control of the vertical flame path of the combustion chamber between the two adjacent carbonization chambers and the normal carbonization chamber is determined by the fire adjuster according to the comprehensive consideration of the conditions of maintenance, temperature, production organization and the like. In the ceramic repair welding operation process, the temperature of the furnace wall of the carbonization chamber is ensured to be overhauled: the temperature of the furnace wall in the repairing area is more than or equal to 700 ℃, the temperature of the furnace wall in the non-repairing area is more than or equal to 900 ℃, if the temperature of the furnace wall is too low, the temperature of the furnace wall is firstly increased, and then ceramic repair welding is carried out after the temperature of the furnace wall reaches more than 700 ℃.
Optionally, in step two, heat preservation and insulation device includes the indisputable cage of a plurality of cube structures, before overhauling carbonization chamber stove mouth, need install or set up little platform, be convenient for install the indisputable cage of heat preservation and insulation and work at the stove mouth, the indisputable cage is the scene preparation, the width is generally about 400mm, it is specific to need confirm according to carbonization chamber actual width, both so be convenient for install again, be convenient for demolish, can guarantee heat preservation and insulation effect and construction simultaneously, both ends are equipped with the intercommunication passageway around the indisputable cage, indisputable cage intercommunication passageway both sides and top all cover have stainless steel wire net, the fixed cladding in stainless steel wire net outside has a ceramic fiber blanket that contains zirconium, ceramic fiber slag ball content is about 20, ceramic fiber is long and thin 4.5 mu m, slag ball content is high, the fibre is thick, a large amount of slag balls, the fibre adheres to on the operating personnel body during the construction, cause skin itching, the condition such as stink and difficult washing, harmful staff is healthy, can't satisfy the operation demand. The zirconium-containing ceramic fiber blanket has low slag ball content, and the slag ball content is generally less than or equal to 12 percent, so that the fiber blanket can be used next to the skin and generally does not cause skin itch. The zirconium-containing ceramic fiber has the advantages of slender length of 4 mu m, good toughness, high strength, convenient use and convenient construction; the technical parameters of the selected zirconium-containing ceramic fiber blanket are as follows:
1) Classification temperature (deg.c): 1400
2) Thermal conductivity W/(m.k) (128 kg/m 3) (average 500 ℃ C.). Less than or equal to 0.153
3) Heating permanent line change (%): 1350 ℃ multiplied by 24 hours is less than or equal to-3
4) Tensile strength (Mpa) (thickness 25 mm): not less than 0.06
5) Fiber diameter (μm): 4
6) Slag ball content (%) (++0.212 mm): 12
7) The main chemical components are as follows:
A1203：≥36％
Si02：≥48％
Zr O2：≥15％
Fe203：≤0.1％；
AL2O3+SiO2+Zr O2：99％；
The iron cage top is smooth arch face structure, has guaranteed the intensity at device top, prevents that the top from dropping because of graphite, fragment of brick and smash the risk of damaging the device even injuring the personnel and has enlarged device headspace, has set aside the space for ventilation pipeline's erection. The bottom surface of the iron cage needs to be padded with a zirconium-containing ceramic fiber blanket after the device is pushed into the carbonization chamber during construction so as to achieve the heat insulation effect.
Optionally, in the fourth step, the ventilation device includes a ventilation pipe horizontally disposed in the iron cage, and the ventilation pipe is located below the top of the iron cage; the tail end of the ventilating duct is connected with an air nozzle close to the position of a constructor through threads.
Optionally, the air shower nozzle include with air inlet of air pipe fixed connection, the air inlet is kept away from air pipe's one end intercommunication has the shower nozzle body, shower nozzle body one end is connected with the nozzle, and the sealed threaded connection of the other end has the back lid, this internal fixed guide vane that is provided with of shower nozzle, a plurality of water conservancy diversion holes have been seted up on the guide vane, the guide vane is located the nozzle with between the air inlet.
Optionally, the diversion holes comprise six first diversion holes uniformly arranged on the diversion sheet in a surrounding way and a second diversion hole positioned at the center of the diversion sheet; the second diversion hole is of a vertical horn-shaped structure, the diameter of the upper end of the second diversion hole is 12mm, and the diameter of the lower end of the second diversion hole is 7.5mm; the first diversion hole comprises a horn-shaped upper channel and a lower channel which is obliquely arranged, wherein the depth of the upper channel is 5mm, the top diameter of the upper channel is 12mm, the bottom diameter of the upper channel is 7.5mm, the bottom of the upper channel is communicated with the top of the lower channel, the diameter of the lower channel is 7.5mm, and the lower channel is of an oblique hole structure with the depth of 10mm and the inclination of 30 degrees.
Optionally, the guide vane is arranged at the position of the air inlet at the top of the nozzle, the diameter of the largest position of the air inlet at the upper part of the nozzle is 50mm, the upper part of the nozzle is of a bell-mouth structure with gradually reduced diameter, the narrowest part of the diameter of the upper part of the nozzle is 15mm, the diameter of the lower part of the nozzle is gradually enlarged, and the diameter of the air outlet at the lowest part of the lower part of the nozzle is 25mm. When in use, compressed air flows into the nozzle body from the air inlet, and then enters the nozzle through 7 guide holes of the guide vane. When compressed air passes through the 6 first diversion holes, the compressed air is pressurized through the horn mouth of the upper half part, then the air is diverted through the inclined holes of the lower half part, a vortex rotating anticlockwise is formed, and then the compressed air enters the nozzle under the action of pressure. The rotating vortex is gradually pressurized in the bell mouth of the upper half of the nozzle, and then is sprayed out through the positive bell mouth of the lower part of the nozzle to form rotating airflow. Like this, through the rotatory air current of air shower nozzle spun air formation cone form above constructor, the air distribution scope is more suitable and even on constructor's head and health upper portion, can effectively isolate hot air current and heat radiation to the influence of constructor's health, carries out more effective cooling to the operating personnel, guarantees that constructor has abundant oxygen supply simultaneously.
Optionally, the existing ceramic soldering material suitable for the coke oven contains combustible silicon and aluminum, and the combustible in the deep vertical flame path ceramic soldering material does not contain aluminum, which is mainly as follows: 1) The aluminum in the original ceramic welding repair material is mainly used for promoting the combustion of the welding repair material, the temperature of the deep vertical flame path furnace wall is higher than that of the furnace end furnace wall, the material is easier to burn and melt, and aluminum does not need to be added. 2) Because the temperature of the furnace wall of the deep vertical flame path of the carbonization chamber is higher, the ceramic welding repair material is required to have higher load softening point, and the load softening temperature is reduced due to the fact that aluminum oxide is contained in the ceramic welding repair material containing aluminum after sintering, so that the use requirement is not met. 3) Aluminum has a relatively low ignition point, so that there is a relatively high risk of using an aluminum-containing ceramic repair filler in close proximity in a high temperature region, and thus aluminum cannot be contained in the ceramic repair filler when the fire wall is being repaired by deep-seated ceramic repair filler. Because the conveying distance of the deep vertical flame path is longer, the larger granularity is not beneficial to long-distance conveying, the average granularity of the ceramic welding repair material is correspondingly reduced, and meanwhile, in order to ensure the conveying amount and the conveying speed of the welding repair of the deep flame path, the granularity range is finally selected to be 0.1-2mm on the basis of improving the mixer; the ceramic welding repair material for the deep vertical flame path welding repair comprises the following components in proportion: 45-58 parts of fused quartz with the granularity of 0.1-2mm, 16-22 parts of fused white corundum with the granularity of 0.04-0.1 mm, 20-32 parts of calcium stabilized zirconia with the granularity of less than 100 meshes, and 6-10 parts of metal silicon powder with the granularity of 300-500 meshes.
Optionally, the discharge amount of a mixer used for the deep vertical flame path repair welding is 30 kg/h; the pressure of the oxygen is 0.15-0.2 MPa; the mixer comprises a mixing chamber mixing section, a mixing chamber shrinking section and a mixing chamber expanding section which are sequentially communicated, wherein a discharge hole is formed in the tail end of the mixing chamber expanding section, a feed inlet is formed in one side of the mixing chamber mixing section, and an oxygen nozzle is communicated with one end, far away from the discharge hole, of the mixing chamber mixing section; an overflow hole is formed in the mixing section of the mixing chamber; the diameter of the oxygen nozzle is 6mm; the total length of the mixer is 195mm, the diameter of the contraction section of the mixing chamber is 12mm, and the length is 115mm; the outlet diameter of the expansion section of the mixing chamber was 14mm and the length was 35mm. If the external resistance is increased during material conveying, the overflow holes can flow out part of the welding repair material, so that the stable work of the mixer is ensured; because the oxygen pressure is reduced, the oxygen nozzle is enlarged, the oxygen flow rate at the oxygen nozzle is reduced, the negative pressure generated at the feed opening of the mixing chamber is reduced, the amount of air is reduced, and the mixing chamber can absorb less air at the same time of reducing the amount of the material to improve the oxygen content of the spray gun during discharging, and the higher oxygen content can promote the material to be fully combusted, so that the quality of ceramic welding repair is ensured.
Compared with the prior art, the invention has the following technical effects:
The method provided by the invention is used for ceramic repair welding of the furnace wall of the deep vertical flame path of the coke furnace, the depth of the ceramic repair welding can reach 18 vertical flame paths and 9 meters, and the material hanging time of the ceramic repair welding is long, so that the method is suitable for the coke furnace to use under the normal production temperature condition. The method ensures that the furnace wall of the deep vertical flame path of the coke oven carbonization chamber can be effectively repaired, is beneficial to improving the temperature of the coke oven, ensures the transverse temperature coefficient, can reduce the heat consumption of the coke oven, reduces the standard vertical flame path temperature, improves the vertical flame path temperature and ensures the coke quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the structure of an iron cage according to the present invention;
FIG. 2 is a schematic longitudinal cross-section of a mixer according to the invention;
FIG. 3 is a schematic cross-sectional view of a mixer according to the present invention;
FIG. 4 is a schematic diagram of an air nozzle according to the present invention;
FIG. 5 is a schematic cross-sectional view of an air nozzle of the present invention;
FIG. 6 is a schematic view of a baffle according to the present invention;
FIG. 7 is a schematic cross-sectional view of a first pilot hole according to the present invention;
FIG. 8 is a schematic cross-sectional view of a nozzle of the present invention;
Wherein, 1 is the iron cage, 2 is the air pipe, 3 is the air inlet, 4 is the shower nozzle body, 5 is the nozzle, 6 is the back shroud, 7 is the guide vane, 701 is first water conservancy diversion hole, 702 is the second water conservancy diversion hole, 8 is mixing chamber mixing section, 9 is mixing chamber shrink section, 10 is mixing chamber expansion section, 11 is the discharge gate, 12 is the feed inlet, 13 is the oxygen nozzle, 14 is the overflow hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a method for repairing ceramic of a deep vertical flame path furnace wall of a coke oven carbonization chamber, which solves the problems in the prior art, ensures that the deep vertical flame path furnace wall of the coke oven carbonization chamber can be effectively repaired, is beneficial to improving the temperature of the coke oven, ensures the transverse temperature coefficient, can reduce the heat consumption of the coke oven, reduces the standard vertical flame path temperature, improves the vertical flame path temperature and ensures the quality of coke.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1-8, the invention provides a method for repairing ceramic welding of a furnace wall of a vertical flame path in a deep part of a coking chamber of a coke oven, which comprises the following steps:
Pushing out coke in the carbonization chamber to ensure that the coke is in an empty furnace state before repair welding; when ceramic repair welding is carried out on the vertical flame path furnace wall of the machine side or Jiao Fangshen parts, constructors enter the carbonization chamber to carry out ceramic repair welding construction, so that the construction quality can be ensured by short-distance repair welding, the forward and backward directions of the coke oven locomotive are not influenced, and the maintenance time is not required to be provided independently;
Step two, manufacturing a heat preservation and insulation device which can be rapidly pushed into the carbonization chamber and rapidly taken out according to the specific condition of the width of the carbonization chamber of the coke oven; the heat preservation and heat insulation device is an iron cage 1, the iron cage 1 is manufactured according to the specific condition of the width of the coke oven carbonization chamber, the installation and the dismantling are convenient, and meanwhile, the heat preservation and heat insulation effect and the construction can be guaranteed. The iron cage 1 is 2m long and 1.9 m high under the general condition, the width is determined according to the width of the carbonization chamber, and the iron cage can be quickly pushed into the carbonization chamber and quickly taken out, is convenient to construct and needs 6 groups of iron cages at most; the ceramic welding repair deep vertical fire path furnace wall needs to adopt a heat preservation and insulation device with characteristics of China, and the heat preservation and insulation device adopts a zirconium-containing ceramic fiber blanket for heat insulation. Because the common ceramic fiber blanket contains a large number of slag balls and short fibers, the content of the common ceramic fiber slag balls is about 20 percent, the ceramic fibers are slender by 4.5 mu m, the space in the heat preservation and insulation device is narrow during construction, constructors need to work by attaching the ceramic fiber blanket, a large number of slag balls and fibers are attached to the constructors, skin itching, stinging and other conditions are caused, the cleaning is difficult, the health of the staff is harmful, and the operation requirement cannot be met. The zirconium-containing ceramic fiber blanket used by us has low slag ball content, generally less than or equal to 12 percent, the zirconium-containing ceramic fiber has slender length of 4 mu m, good toughness and high strength, and the staff can not feel itching, stinging and other problems after practical use;
Thirdly, the furnace door frame at the upper part of the heat preservation and heat insulation device is heat-insulated by adopting a ceramic fiber blanket, a hanging heat insulation curtain mode cannot be adopted for heat insulation, the heat insulation curtain has poor sealing effect, the furnace wall is damaged at a too high cooling speed, in addition, the two sides of the heat insulation curtain are not sealed, the protection plate and the furnace door frame are easy to burn out due to high-temperature radiation of the carbonization chamber, the furnace iron part is seriously deformed, and the non-overhauling part and the exposed furnace wall are heat-insulated by adopting the ceramic fiber blanket, so that the heat insulation thickness is 40-50mm;
Step four, a ventilation device of the heat preservation and insulation device is opened, constructors enter the heat preservation and insulation device, and residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber are cleaned; the ventilation device comprises a ventilation pipeline 2, wherein the length of each section of the ventilation pipeline 2 is about 2.2m, and the ventilation pipeline is slightly longer than the length of each section of heat preservation and heat insulation device, so that the ventilation device is convenient to splice and install, and at most 6 sections are needed. The head of the first section of pipeline is provided with a special air nozzle as an air outlet, the air outlet of the nozzle is aligned to the upper part of constructors during installation, compressed air is introduced during construction, and the air is blown to the constructors. Compressed air is sprayed out through the spray head, a rotary air flow is formed at the head and the upper part of the body of a constructor, the air flow distribution range is more proper and uniform, the influence of hot air flow and heat radiation on the body of the constructor can be effectively isolated, the constructor is cooled more effectively, and meanwhile, the constructor is guaranteed to have sufficient oxygen supply;
And fifthly, purging the cleaned furnace wall with compressed air, and cleaning residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber before each ceramic repair welding so as to ensure good combination of ceramic repair welding materials and brick surfaces. After the vibration hammer cleans the surface of the furnace wall of the carbonization chamber, the cleaned furnace wall is purged by compressed air, and then the deep vertical flame path ceramic repair welding is carried out. The compressed air cannot purge the furnace wall for a long time so as to avoid secondary damage of the furnace wall caused by too fast local temperature reduction; then, performing ceramic repair welding on the deep vertical flame path, wherein the temperature of the furnace wall of the carbonization chamber is ensured to be maintained in the ceramic repair welding operation process, the temperature of the furnace wall of a repair area is more than or equal to 700 ℃, the temperature of the furnace wall of a non-repair area is more than or equal to 900 ℃, if the temperature of the furnace wall is lower than the set temperature, heating the furnace wall firstly, and then performing ceramic repair welding;
step six, dismantling and taking out the heat preservation and insulation device after the ceramic is welded and repaired on the furnace wall; heating the furnace wall of the carbonization chamber after the furnace wall is welded and repaired by ceramic, and periodically measuring and adjusting the pressure of the furnace protection iron piece spring in the heating process; and (5) loading coal after the standard vertical flame path temperature reaches the standard, observing the condition of ignition and blowby of the vertical flame paths of the combustion chambers at the two sides of the carbonization chamber after the coal is loaded, and if the problem exists, timely processing.
The ceramic welding repair furnace number must be subjected to cooling control: ① The check and repair furnace number is an empty furnace, and if the blast furnace gas is burned in the combustion chambers at the two sides of the check and repair furnace number, the coke oven gas is converted so as to facilitate the temperature control of the check and repair furnace number; ② The vertical flame paths of the combustion chambers at the two sides of the checking and repairing furnace number stop heating during the checking and repairing period, and the temperature of the vertical flame paths of the furnace heads at the machine coke side is controlled to be not lower than 900 ℃. If the temperature is lower than the target value, the cock is started and the temperature is raised; ③ The adjacent carbonization chambers on the two sides of the inspection and repair furnace number do not push coke during the maintenance period, the coking time is prolonged, and the temperature control of the vertical flame path of the combustion chamber between the two adjacent carbonization chambers and the normal carbonization chamber is determined by the fire adjuster according to the comprehensive consideration of the conditions of maintenance, temperature, production organization and the like. In the ceramic repair welding operation process, the temperature of the furnace wall of the carbonization chamber is ensured to be overhauled: the temperature of the furnace wall in the repairing area is more than or equal to 700 ℃, the temperature of the furnace wall in the non-repairing area is more than or equal to 900 ℃, if the temperature of the furnace wall is too low, the temperature of the furnace wall is firstly increased, and then ceramic repair welding is carried out after the temperature of the furnace wall reaches more than 700 ℃.
Specifically, in the second step, the heat preservation and insulation device comprises a plurality of cubic iron cages 1, before overhauling the carbonization chamber furnace mouth, a small platform needs to be installed or erected, the heat preservation and insulation iron cages 1 are convenient to install and work at the furnace mouth, the iron cages 1 are manufactured on site, the width is generally about 400mm, the specific needs are determined according to the actual width of the carbonization chamber, the installation and detachment are convenient, meanwhile, the heat preservation and insulation effect and construction can be guaranteed, the front end and the rear end of the iron cage 1 are provided with communication channels, the two sides and the top of the communication channels of the iron cage 1 are covered with stainless steel wire nets, the stainless steel wire nets are fixedly covered with zirconium-containing ceramic fiber blankets, the ceramic fiber slag ball content is about 20%, the ceramic fiber is long and thin by 4.5 mu m, the slag ball content is high, the fiber is thick, a large amount of slag balls and the fiber is attached to an operator during construction, the conditions such as skin itching and stinging are caused, the cleaning is difficult, and the harmful staff cannot meet the operation requirements. The zirconium-containing ceramic fiber blanket has low slag ball content, and the slag ball content is generally less than or equal to 12 percent, so that the fiber blanket can be used next to the skin and generally does not cause skin itch. The zirconium-containing ceramic fiber has the advantages of slender length of 4 mu m, good toughness, high strength, convenient use and convenient construction;
The top of the iron cage 1 is of a smooth arched surface structure, so that the strength of the top of the device is guaranteed, the risk that the device is crushed or even the personnel are crushed due to falling of graphite and bricks at the top is prevented, the top space of the device is enlarged, and a space is reserved for erection of the ventilating duct 2. After the device is pushed into the carbonization chamber during construction, the bottom surface of the iron cage 1 is also required to be padded with a zirconium-containing ceramic fiber blanket to achieve the heat insulation effect.
In the fourth step, the ventilation device comprises a ventilation pipeline 2 horizontally arranged in the iron cage, and the ventilation pipeline 2 is positioned below the top of the iron cage 1; the tail end of the ventilation pipeline 2 is connected with an air nozzle at a position close to a constructor through threads.
The air shower nozzle includes the air inlet 3 with air pipe 2 fixed connection, and air inlet 3 keeps away from air pipe 2's one end intercommunication has shower nozzle body 4, and shower nozzle body 4 one end is connected with nozzle 5, and the sealed threaded connection of the other end has back lid 6, and shower nozzle body 4 internal fixation is provided with guide vane 7, has offered a plurality of water conservancy diversion holes on the guide vane 7, and guide vane 7 is located between nozzle 5 and the air inlet 3.
The diversion holes comprise six first diversion holes 701 uniformly arranged on the diversion sheet 7 in a surrounding way and a second diversion hole 702 positioned at the center of the diversion sheet 7; the second diversion hole 702 is of a vertical horn-shaped structure, the diameter of the upper end of the second diversion hole 702 is 12mm, and the diameter of the lower end of the second diversion hole 702 is 7.5mm; the first deflector hole 701 comprises a bell mouth-shaped upper channel and a lower channel obliquely arranged, wherein the depth of the upper channel is 5mm, the top diameter of the upper channel is 12mm, the bottom diameter of the upper channel is 7.5mm, the bottom of the upper channel is communicated with the top of the lower channel, the diameter of the lower channel is 7.5mm, and the lower channel is an inclined hole structure with the depth of 10mm and the inclination of 30 degrees.
The guide vane 7 is arranged at the position of the air inlet at the top of the nozzle 5, the diameter of the largest position of the air inlet at the upper part of the nozzle 5 is 50mm, the upper part of the nozzle 5 is of a bell mouth-shaped structure with gradually reduced diameter, the narrowest part of the diameter of the upper part of the nozzle is 15mm, the diameter of the lower part of the nozzle 5 is gradually expanded, and the diameter of the air outlet at the lowest part of the lower part of the nozzle 5 is 25mm. In use, compressed air flows into the nozzle body from the air inlet and then enters the nozzle 5 through the 7 guide holes of the guide vane 7. When the compressed air passes through the 6 first diversion holes 701, the compressed air is pressurized through the bell mouth of the upper half part, and then is diverted through the inclined holes of the lower half part, so that a vortex rotating anticlockwise is formed, and then enters the nozzle 5 under the action of pressure. The swirling vortex is gradually pressurized in the bell mouth of the upper half of the nozzle 5 and then ejected through the positive bell mouth of the lower part of the nozzle 5 to form a swirling air flow. Like this, through the rotatory air current of air shower nozzle spun air formation cone form above constructor, the air distribution scope is more suitable and even on constructor's head and health upper portion, can effectively isolate hot air current and heat radiation to the influence of constructor's health, carries out more effective cooling to the operating personnel, guarantees that constructor has abundant oxygen supply simultaneously.
The existing ceramic soldering material suitable for the coke oven contains combustible substances of silicon and aluminum, and the combustible substances in the deep vertical flame path ceramic soldering material do not contain aluminum, so that the main reasons are as follows: 1) The aluminum in the original ceramic welding repair material is mainly used for promoting the combustion of the welding repair material, the temperature of the deep vertical flame path furnace wall is higher than that of the furnace end furnace wall, the material is easier to burn and melt, and aluminum does not need to be added. 2) Because the temperature of the furnace wall of the deep vertical flame path of the carbonization chamber is higher, the ceramic welding repair material is required to have higher load softening point, and the load softening temperature is reduced due to the fact that aluminum oxide is contained in the ceramic welding repair material containing aluminum after sintering, so that the use requirement is not met. 3) Aluminum has a relatively low ignition point, so that there is a relatively high risk of using an aluminum-containing ceramic repair filler in close proximity in a high temperature region, and thus aluminum cannot be contained in the ceramic repair filler when the fire wall is being repaired by deep-seated ceramic repair filler. Because the conveying distance of the deep vertical flame path is longer, the larger granularity is not beneficial to long-distance conveying, the average granularity of the ceramic welding repair material is correspondingly reduced, and meanwhile, in order to ensure the conveying amount and the conveying speed of the welding repair of the deep flame path, the granularity range is finally selected to be 0.1-2mm on the basis of improving the mixer; the ceramic welding repair material for the deep vertical flame path welding repair comprises the following components in proportion: 45-58 parts of fused quartz with the granularity of 0.1-2mm, 16-22 parts of fused white corundum with the granularity of 0.04-0.1 mm, 20-32 parts of calcium stabilized zirconia with the granularity of less than 100 meshes, and 6-10 parts of metal silicon powder with the granularity of 300-500 meshes.
The discharge amount of a mixer used for welding and repairing the deep vertical flame path is 30 kg/h; the pressure of the oxygen is 0.15-0.2 MPa; the mixer comprises a mixing chamber mixing section 8, a mixing chamber shrinking section 9 and a mixing chamber expanding section 10 which are sequentially communicated, the tail end of the mixing chamber expanding section 10 is provided with a discharge port 11, one side of the mixing chamber mixing section 8 is provided with a feed port 12, and one end, far away from the discharge port 11, of the mixing chamber mixing section 8 is communicated with an oxygen nozzle 13; an overflow hole 14 is formed in the mixing section 8 of the mixing chamber; the diameter of the oxygen nozzle 13 is 6mm; the total length of the mixer is 195mm, the diameter of the mixing chamber contraction section 9 is 12mm, and the length is 115mm; the outlet diameter of the mixing chamber expansion section 10 was 14mm and the length 35mm. If the external resistance is increased during material conveying, the overflow holes 14 can flow out part of the welding repair material, so that the stable work of the mixer is ensured; because the oxygen pressure is reduced, the oxygen nozzle 13 is enlarged, the oxygen flow rate at the oxygen nozzle 13 is reduced, so that the negative pressure generated at the feed opening of the mixing chamber is reduced, the amount of air is reduced, and the mixing chamber can absorb less air at the same time of material conveying, so that the oxygen content of the spray gun during discharging is improved, the material is promoted to be fully combusted by the higher oxygen content, and the ceramic repair welding quality is further ensured.
Example 1:4.3 m tamping coke oven
1. Basic case
In the past, a plurality of units are to reduce the cost of raw fuel, the top-loading coke oven is changed into a tamping coke oven, and although the reformed coke oven can be produced, a part of coke oven bodies have problems, and the problems must be solved in time, otherwise, the service life of the coke oven bodies and the quality and quality of the coke oven bodies are influenced.
2. Analysis of influence and cause
1. After the top-loading coke oven is changed into the tamping coke oven, a long horizontal crack is formed on the oven wall of the coke oven, and only one or two horizontal cracks are formed on each oven wall in the track of the coal charging car, so that the horizontal crack can be seen from the oven door by naked eyes. After the horizontal cracks of the furnace wall appear, the furnace wall is seriously leaked, and the production cannot be satisfied because the furnace wall is seriously leaked by a certain unit. In order to prevent the chimney of the coke oven from emitting black smoke, the vertical fire path fire observation hole cover with serious blowby is opened.
2. The horizontal cracks on the furnace wall of the coke oven carbonization chamber cause serious blowby of the furnace wall, so that raw gas at the horizontal cracks of the blowby is burnt, and the temperature is high; raw gas is leaked to the vertical flame path for combustion, so that the temperature of the vertical flame path is high. The local high temperature of the coke oven wall easily causes the damage of the wall body of the coke oven wall, the temperature of the blowby oven wall and the vertical fire channel is very high, the furnace wall is whitened by naked eyes, and no good method is provided for treatment.
3, The leakage of the oven wall of the coke oven is serious, so that the local high temperature is caused at one side of the vertical flame path of the oven wall, the bricks of the oven wall fall off, the oven wall at one side of the carbonization chamber is complete at the beginning, and after a period of time, the oven wall has a melting hole, so that the normal production of the coke oven cannot be ensured.
3. Measures to be taken against the problems:
Problems occur in the top-loading modified tamping coke oven, whether horizontal cracks, furnace wall blowby, flame path brick drop and wall surface grooves, and the method of deep vertical flame path ceramic repair welding is most effective.
4. Construction steps
1. The coke oven deep flame path ceramic repair welding must push out the coke in the carbonization chamber, and is performed under the condition of empty furnace.
2. No matter the machine side or Jiao Fangshen parts of the vertical fire path furnace wall ceramic repair welding, constructors enter the carbonization chamber to perform ceramic repair welding construction, so that the construction quality can be ensured by short-distance repair welding, the current and the current of the coke oven locomotive are not influenced, and the maintenance time is not required to be provided independently.
3. The ceramic welding repair deep vertical fire path furnace wall needs to adopt a heat preservation and insulation device with characteristics of China, and the heat preservation and insulation device adopts a zirconium-containing ceramic fiber blanket for heat insulation. Because the common ceramic fiber blanket contains a large number of slag balls and short fibers, the content of the common ceramic fiber slag balls is about 20 percent, the ceramic fibers are slender by 4.5 mu m, the space in the heat preservation and insulation device is narrow during construction, constructors need to work by attaching the ceramic fiber blanket, a large number of slag balls and fibers are attached to the constructors, skin itching, stinging and other conditions are caused, the cleaning is difficult, the health of the staff is harmful, and the operation requirement cannot be met. The zirconium-containing ceramic fiber blanket used by the user has low slag ball content which is generally less than or equal to 12 percent, the zirconium-containing ceramic fiber has slender length of 4 mu m, good toughness and high strength, and the staff can not feel itching, stinging and the like after practical use.
4. The heat preservation and heat insulation device is an iron cage manufactured on site, and the iron cage is manufactured according to the specific condition of the width of the coke oven carbonization chamber, so that the heat preservation and heat insulation device is convenient to install and remove, and meanwhile, the heat preservation and heat insulation effect and the construction can be guaranteed. The iron cage is generally 2m long and 1.9 m high, and the width is determined according to the width of the carbonization chamber, so that the iron cage can be quickly pushed into the carbonization chamber and quickly taken out, and the construction is convenient and quick, and at most 6 groups of iron cages are needed.
5. The special heat preservation and insulation device of my department is provided with a ventilation device, the ventilation device consists of a pipeline erected at the top of the heat preservation and insulation device, the ventilation pipeline is arranged below the top surface D, and each section of pipeline is about 2.2m slightly longer than the length of each section of heat preservation and insulation device, so that the heat preservation and insulation device is convenient to splice and install, and at most 6 sections are needed. The head of the first section of pipeline is provided with a special spray head of my department as an air outlet, an air outlet of the spray head is aligned to the upper part of constructors during installation, compressed air is introduced during construction, and air is blown to the constructors. Compressed air is sprayed out through the spray head, a rotary air flow is formed at the head and the upper part of the body of a constructor, the air flow distribution range is more proper and uniform, the influence of hot air flow and heat radiation on the body of the constructor can be effectively isolated, the constructor is cooled more effectively, and meanwhile, the constructor is guaranteed to have sufficient oxygen supply.
6. The furnace door frame on the upper part of the iron cage is insulated by adopting a ceramic fiber blanket, the heat insulation can not be realized by adopting a hanging heat insulation curtain mode, the sealing effect of the heat insulation curtain is poor, the cooling speed of the coke oven is too high, the furnace wall is damaged, in addition, the two sides of the heat insulation curtain are not sealed, the protection plate and the furnace door frame are easily burnt out by high-temperature radiation of the carbonization chamber, and the deformation of furnace protecting iron parts is seriously caused.
7. The non-overhauling parts and the exposed furnace wall are insulated by adopting ceramic fiber blankets, and the insulation thickness is 40-50mm.
8. In order to ensure good combination of ceramic repair welding materials and brick surfaces, residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber are cleaned necessarily before each ceramic repair welding, and cleaning effects can be ensured by adopting the patent vibratory hammer of my department to clean damaged furnace walls.
9. After the vibration hammer cleans the surface of the furnace wall of the carbonization chamber, the cleaned furnace wall is purged by compressed air, and then the deep vertical flame path ceramic repair welding is carried out. The compressed air cannot purge the furnace wall for a long time so as to avoid secondary damage to the furnace wall caused by too fast local temperature reduction.
10. The ceramic welding repair furnace number must be subjected to cooling control: ① The check and repair furnace number is an empty furnace, and if the blast furnace gas is burned in the combustion chambers at the two sides of the check and repair furnace number, the coke oven gas is converted so as to facilitate the temperature control of the check and repair furnace number; ② The vertical flame paths of the combustion chambers at the two sides of the checking and repairing furnace number stop heating during the checking and repairing period, and the temperature of the vertical flame paths of the furnace heads at the machine coke side is controlled to be not lower than 900 ℃. If the temperature is lower than the target value, the cock is started and the temperature is raised; ③ The adjacent carbonization chambers on the two sides of the inspection and repair furnace number do not push coke during the maintenance period, the coking time is prolonged, and the temperature control of the vertical flame path of the combustion chamber between the two adjacent carbonization chambers and the normal carbonization chamber is determined by the fire adjuster according to the comprehensive consideration of the conditions of maintenance, temperature, production organization and the like. In the ceramic repair welding operation process, the temperature of the furnace wall of the carbonization chamber is ensured to be overhauled: the temperature of the furnace wall in the repairing area is more than or equal to 700 ℃, the temperature of the furnace wall in the non-repairing area is more than or equal to 900 ℃, if the temperature of the furnace wall is too low, the temperature of the furnace wall is firstly increased, and then ceramic repair welding is carried out after the temperature of the furnace wall reaches more than 700 ℃.
11. And (5) removing and taking out the heat-insulating iron cage after the ceramic is welded and repaired on the furnace wall.
12. After the ceramic is welded and repaired, the furnace wall of the carbonization chamber is heated, and the pressure of the furnace protecting iron part spring is measured and regulated regularly in the heating process.
13. The standard vertical flame path temperature can be used for loading coal after reaching the standard, and the condition of the ignition and the blowby of the vertical flame paths of the combustion chambers at the two sides of the carbonization chamber after loading coal is observed, and if the problem exists, the problem is treated in time.
5. Effects of
The technical method for repairing the deep vertical flame path ceramic welding of the coke oven can thoroughly solve the problem of deep vertical flame path blowby in the transformation process of the needle coke oven, and ensure the tightness of the furnace wall of the deep vertical flame path of the coke oven carbonization chamber. The hanging and sealing time can reach 10-15 years.
Original method
Some units have no good method for the occurrence of furnace wall blowby, and only adopt a method for increasing the pressure of the gas collecting tube, hope that the blowby is blocked by the blowby of more graphite at the furnace wall. The method can play a certain role in a short time, but can not thoroughly solve the problem. The graphite is burned off when production is abnormal or furnace temperature fluctuates, and blowby problems still occur.
Example 2: perforation, denudation and melting holes appear on the lower furnace wall of the 5.5 m tamping coke oven
1. Basic case
The first layer and the second layer of bricks of the furnace wall of the carbonization chamber are scratched and damaged seriously due to the in-out of the coal supporting plate of the 5.5 m tamping coke furnace, and grooves with the depth of 30-50mm appear. The first layer brick furnace wall and the second layer brick furnace wall in the middle of the carbonization chamber are respectively and seriously perforated and have melting holes, the length of the two vertical flame paths is 800mm, the height of the two vertical flame paths is 3-4 layers of bricks, and the height of the two vertical flame paths is 300-400mm. The fire holes on the two sides are seriously smoked and burned after coal is filled. The blowby is very serious, which affects the normal production of the coke oven.
2. Measures to be taken against the problems:
Problems occur in the top-loading modified tamping coke oven, whether horizontal cracks, furnace wall blowby, flame path brick drop and wall surface grooves, and the method of deep vertical flame path ceramic repair welding is most effective.
3. Construction steps
1. The coke oven deep flame path ceramic repair welding must push out the coke in the carbonization chamber, and is performed under the condition of empty furnace.
2. No matter the machine side or Jiao Fangshen parts of the vertical fire path furnace wall ceramic repair welding, constructors enter the carbonization chamber to perform ceramic repair welding construction, so that the construction quality can be ensured by short-distance repair welding, the current and the current of the coke oven locomotive are not influenced, and the maintenance time is not required to be provided independently.
3. The ceramic welding repair deep vertical fire path furnace wall needs to adopt a heat preservation and insulation device with characteristics of China, and the heat preservation and insulation device adopts a zirconium-containing ceramic fiber blanket for heat insulation. Because the common ceramic fiber blanket contains a large number of slag balls and short fibers, the content of the common ceramic fiber slag balls is about 20 percent, the ceramic fibers are slender by 4.5 mu m, the space in the heat preservation and insulation device is narrow during construction, constructors need to work by attaching the ceramic fiber blanket, a large number of slag balls and fibers are attached to the constructors, skin itching, stinging and other conditions are caused, the cleaning is difficult, the health of the staff is harmful, and the operation requirement cannot be met. The zirconium-containing ceramic fiber blanket used by the user has low slag ball content which is generally less than or equal to 12 percent, the zirconium-containing ceramic fiber has slender length of 4 mu m, good toughness and high strength, and the staff can not feel itching, stinging and the like after practical use.
4. The heat preservation and heat insulation device is an iron cage manufactured on site, and the iron cage is manufactured according to the specific condition of the width of the coke oven carbonization chamber, so that the heat preservation and heat insulation device is convenient to install and remove, and meanwhile, the heat preservation and heat insulation effect and the construction can be guaranteed. The iron cage is generally 2m long and 1.9 m high, and the width is determined according to the width of the carbonization chamber, so that the iron cage can be quickly pushed into the carbonization chamber and quickly taken out, and the construction is convenient and quick, and at most 6 groups of iron cages are needed.
5. The special heat preservation and insulation device of my department is provided with a ventilation device, the ventilation device consists of a pipeline erected at the top of the heat preservation and insulation device, the ventilation pipeline is arranged below the top surface D, and each section of pipeline is about 2.2m slightly longer than the length of each section of heat preservation and insulation device, so that the heat preservation and insulation device is convenient to splice and install, and at most 6 sections are needed. The head of the first section of pipeline is provided with a special spray head of my department as an air outlet, an air outlet of the spray head is aligned to the upper part of constructors during installation, compressed air is introduced during construction, and air is blown to the constructors. Compressed air is sprayed out through the spray head, a rotary air flow is formed at the head and the upper part of the body of a constructor, the air flow distribution range is more proper and uniform, the influence of hot air flow and heat radiation on the body of the constructor can be effectively isolated, the constructor is cooled more effectively, and meanwhile, the constructor is guaranteed to have sufficient oxygen supply.
6. The furnace door frame on the upper part of the iron cage is insulated by adopting a ceramic fiber blanket, the heat insulation can not be realized by adopting a hanging heat insulation curtain mode, the sealing effect of the heat insulation curtain is poor, the cooling speed of the coke oven is too high, the furnace wall is damaged, in addition, the two sides of the heat insulation curtain are not sealed, the protection plate and the furnace door frame are easily burnt out by high-temperature radiation of the carbonization chamber, and the deformation of furnace protecting iron parts is seriously caused.
7. The non-overhauling parts and the exposed furnace wall are insulated by adopting ceramic fiber blankets, and the insulation thickness is 40-50mm.
8. In order to ensure good combination of ceramic repair welding materials and brick surfaces, residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber are cleaned necessarily before each ceramic repair welding, and cleaning effects can be ensured by adopting the patent vibratory hammer of my department to clean damaged furnace walls.
9. After the vibration hammer cleans the surface of the furnace wall of the carbonization chamber, the cleaned furnace wall is purged by compressed air, and then the deep vertical flame path ceramic repair welding is carried out. The compressed air cannot purge the furnace wall for a long time so as to avoid secondary damage to the furnace wall caused by too fast local temperature reduction.
10. The ceramic welding repair furnace number must be subjected to cooling control: ① The check and repair furnace number is an empty furnace, and if the blast furnace gas is burned in the combustion chambers at the two sides of the check and repair furnace number, the coke oven gas is converted so as to facilitate the temperature control of the check and repair furnace number; ② The vertical flame paths of the combustion chambers at the two sides of the checking and repairing furnace number stop heating during the checking and repairing period, and the temperature of the vertical flame paths of the furnace heads at the machine coke side is controlled to be not lower than 900 ℃. If the temperature is lower than the target value, the cock is started and the temperature is raised; ③ The adjacent carbonization chambers on the two sides of the inspection and repair furnace number do not push coke during the maintenance period, the coking time is prolonged, and the temperature control of the vertical flame path of the combustion chamber between the two adjacent carbonization chambers and the normal carbonization chamber is determined by the fire adjuster according to the comprehensive consideration of the conditions of maintenance, temperature, production organization and the like. In the ceramic repair welding operation process, the temperature of the furnace wall of the carbonization chamber is ensured to be overhauled: the temperature of the furnace wall in the repairing area is more than or equal to 700 ℃, the temperature of the furnace wall in the non-repairing area is more than or equal to 900 ℃, if the temperature of the furnace wall is too low, the temperature of the furnace wall is firstly increased, and then ceramic repair welding is carried out after the temperature of the furnace wall reaches more than 700 ℃.
11. And (5) removing and taking out the heat-insulating iron cage after the ceramic is welded and repaired on the furnace wall.
12. After the ceramic is welded and repaired, the furnace wall of the carbonization chamber is heated, and the pressure of the furnace protecting iron part spring is measured and regulated regularly in the heating process.
13. The standard vertical flame path temperature can be used for loading coal after reaching the standard, and the condition of the ignition and the blowby of the vertical flame paths of the combustion chambers at the two sides of the carbonization chamber after loading coal is observed, and if the problem exists, the problem is treated in time.
5. Effects of
The technical method for repairing the deep vertical flame path ceramic welding of the coke oven can thoroughly solve the problem of deep vertical flame path blowby in the transformation process of the needle coke oven, and ensure the tightness of the furnace wall of the deep vertical flame path of the coke oven carbonization chamber. The hanging and sealing time can reach 10-15 years.
Example 3: upper furnace wall of 6 m top-loading coke oven
1. Basic case
In the coke oven production process, the condition that the pushing cart brings channel steel of the coke guide groove to the carbonization chamber to scrape the wall of the furnace in the coke pushing rod recovery process sometimes occurs, the scraping position is positioned at the top end of the coke pushing rod head, the scraping position is generally 5 meters away from the bottom of the carbonization chamber, the depth can reach 14-18 flame paths, the damage height is generally about 2 layers of bricks, and the leakage of the furnace wall is caused, so that the normal production is greatly influenced.
2. Measures to be taken against the problems:
For the furnace wall damage caused by the mechanical accident, the conventional maintenance means at present cannot be solved because the furnace wall damage position is higher and is positioned at a deeper position in the carbonization chamber, and only the deep vertical flame path ceramic repair welding method of China can be adopted.
4. Construction steps
1. The coke oven deep flame path ceramic repair welding must push out the coke in the carbonization chamber, and is performed under the condition of empty furnace.
2. No matter the machine side or Jiao Fangshen parts of the vertical fire path furnace wall ceramic repair welding, constructors enter the carbonization chamber to perform ceramic repair welding construction, so that the construction quality can be ensured by short-distance repair welding, the current and the current of the coke oven locomotive are not influenced, and the maintenance time is not required to be provided independently.
3. The ceramic welding repair deep vertical fire path furnace wall needs to adopt a heat preservation and insulation device with characteristics of China, and the heat preservation and insulation device adopts a zirconium-containing ceramic fiber blanket for heat insulation. Because the common ceramic fiber blanket contains a large number of slag balls and short fibers, the content of the common ceramic fiber slag balls is about 20 percent, the ceramic fibers are slender by 4.5 mu m, the space in the heat preservation and insulation device is narrow during construction, constructors need to work by attaching the ceramic fiber blanket, a large number of slag balls and fibers are attached to the constructors, skin itching, stinging and other conditions are caused, the cleaning is difficult, the health of the staff is harmful, and the operation requirement cannot be met. The zirconium-containing ceramic fiber blanket used by the user has low slag ball content which is generally less than or equal to 12 percent, the zirconium-containing ceramic fiber has slender length of 4 mu m, good toughness and high strength, and the staff can not feel itching, stinging and the like after practical use.
4. The heat preservation and heat insulation device is an iron cage manufactured on site, and the iron cage is manufactured according to the specific condition of the width of the coke oven carbonization chamber, so that the heat preservation and heat insulation device is convenient to install and remove, and meanwhile, the heat preservation and heat insulation effect and the construction can be guaranteed. The iron cage is generally 2m long and 1.9 m high, and the width is determined according to the width of the carbonization chamber, so that the iron cage can be quickly pushed into the carbonization chamber and quickly taken out, and the construction is convenient and quick, and at most 6 groups of iron cages are needed.
5. The special heat preservation and insulation device of my department is provided with a ventilation device, the ventilation device consists of a pipeline erected at the top of the heat preservation and insulation device, the ventilation pipeline is arranged below the top surface D, and each section of pipeline is about 2.2m slightly longer than the length of each section of heat preservation and insulation device, so that the heat preservation and insulation device is convenient to splice and install, and at most 6 sections are needed. The head of the first section of pipeline is provided with a special spray head of my department as an air outlet, an air outlet of the spray head is aligned to the upper part of constructors during installation, compressed air is introduced during construction, and air is blown to the constructors. Compressed air is sprayed out through the spray head, a rotary air flow is formed at the head and the upper part of the body of a constructor, the air flow distribution range is more proper and uniform, the influence of hot air flow and heat radiation on the body of the constructor can be effectively isolated, the constructor is cooled more effectively, and meanwhile, the constructor is guaranteed to have sufficient oxygen supply.
6. The furnace door frame on the upper part of the iron cage is insulated by adopting a ceramic fiber blanket, the heat insulation can not be realized by adopting a hanging heat insulation curtain mode, the sealing effect of the heat insulation curtain is poor, the cooling speed of the coke oven is too high, the furnace wall is damaged, in addition, the two sides of the heat insulation curtain are not sealed, the protection plate and the furnace door frame are easily burnt out by high-temperature radiation of the carbonization chamber, and the deformation of furnace protecting iron parts is seriously caused.
7. The non-overhauling parts and the exposed furnace wall are insulated by adopting ceramic fiber blankets, and the insulation thickness is 40-50mm.
8. In order to ensure good combination of ceramic repair welding materials and brick surfaces, residues such as fireclay, graphite and the like on the furnace wall bricks of the carbonization chamber are cleaned necessarily before each ceramic repair welding, and cleaning effects can be ensured by adopting the patent vibratory hammer of my department to clean damaged furnace walls.
9. After the vibration hammer cleans the surface of the furnace wall of the carbonization chamber, the cleaned furnace wall is purged by compressed air, and then the deep vertical flame path ceramic repair welding is carried out. The compressed air cannot purge the furnace wall for a long time so as to avoid secondary damage to the furnace wall caused by too fast local temperature reduction.
10. The ceramic welding repair furnace number must be subjected to cooling control: ① The check and repair furnace number is an empty furnace, and if the blast furnace gas is burned in the combustion chambers at the two sides of the check and repair furnace number, the coke oven gas is converted so as to facilitate the temperature control of the check and repair furnace number; ② The vertical flame paths of the combustion chambers at the two sides of the checking and repairing furnace number stop heating during the checking and repairing period, and the temperature of the vertical flame paths of the furnace heads at the machine coke side is controlled to be not lower than 900 ℃. If the temperature is lower than the target value, the cock is started and the temperature is raised; ③ The adjacent carbonization chambers on the two sides of the inspection and repair furnace number do not push coke during the maintenance period, the coking time is prolonged, and the temperature control of the vertical flame path of the combustion chamber between the two adjacent carbonization chambers and the normal carbonization chamber is determined by the fire adjuster according to the comprehensive consideration of the conditions of maintenance, temperature, production organization and the like. In the ceramic repair welding operation process, the temperature of the furnace wall of the carbonization chamber is ensured to be overhauled: the temperature of the furnace wall in the repairing area is more than or equal to 700 ℃, the temperature of the furnace wall in the non-repairing area is more than or equal to 900 ℃, if the temperature of the furnace wall is too low, the temperature of the furnace wall is firstly increased, and then ceramic repair welding is carried out after the temperature of the furnace wall reaches more than 700 ℃.
11. And (5) removing and taking out the heat-insulating iron cage after the ceramic is welded and repaired on the furnace wall.
12. After the ceramic is welded and repaired, the furnace wall of the carbonization chamber is heated, and the pressure of the furnace protecting iron part spring is measured and regulated regularly in the heating process.
13. The standard vertical flame path temperature can be used for loading coal after reaching the standard, and the condition of the ignition and the blowby of the vertical flame paths of the combustion chambers at the two sides of the carbonization chamber after loading coal is observed, and if the problem exists, the problem is treated in time.
5. Effects of
The technical method for repairing the deep vertical flame path ceramic welding of the coke oven can thoroughly solve the problem of deep vertical flame path blowby in the transformation process of the needle coke oven, and ensure the tightness of the furnace wall of the deep vertical flame path of the coke oven carbonization chamber. The hanging and sealing time can reach 10-15 years.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (3)
1. A method for ceramic repair welding of a deep vertical flame path furnace wall of a coke oven carbonization chamber is characterized by comprising the following steps: the method comprises the following steps:
pushing out coke in the carbonization chamber to ensure that the coke is in an empty furnace state before repair welding;
step two, manufacturing a heat preservation and heat insulation device capable of being rapidly pushed into a carbonization chamber and rapidly taken out according to the specific condition of the width of the carbonization chamber of the coke oven, wherein the heat preservation and heat insulation device comprises a plurality of iron cages with cube structures, communication channels are arranged at the front end and the rear end of each iron cage, stainless steel wire meshes are covered on two sides and the top of each iron cage communication channel, and zirconium-containing ceramic fiber carpets are fixedly coated on the outer sides of the stainless steel wire meshes; the top of the iron cage is of a smooth arched surface structure;
thirdly, the furnace door frame at the upper part of the heat preservation and heat insulation device adopts a ceramic fiber blanket to preserve heat, and the non-overhauling part and the exposed furnace wall adopt the ceramic fiber blanket to preserve heat, and the heat preservation thickness is 40-50mm;
Step four, a ventilation device of the heat preservation and insulation device is opened, constructors enter the heat preservation and insulation device, and fireclay and graphite residues on furnace wall bricks of the carbonization chamber are cleaned; the ventilation device comprises a ventilation pipeline horizontally arranged in the iron cage, and the ventilation pipeline is positioned below the top of the iron cage; the tail end of the ventilating duct is in threaded connection with an air nozzle at a position close to a constructor; the air nozzle comprises an air inlet fixedly connected with the ventilating duct, the air inlet is communicated with a nozzle body, one end of the nozzle body is connected with a nozzle, the other end of the nozzle body is in sealing threaded connection with a rear cover, a deflector is fixedly arranged in the nozzle body, a plurality of deflector holes are formed in the deflector, and the deflector is positioned between the nozzle and the air inlet;
Purging the cleaned furnace wall with compressed air, then performing ceramic repair welding on a deep vertical flame path, ensuring that the temperature of the furnace wall of a carbonization chamber is maintained in the ceramic repair welding operation process, wherein the temperature of the furnace wall in a repair area is more than or equal to 700 ℃, the temperature of the furnace wall in a non-repair area is more than or equal to 900 ℃, and if the temperature of the furnace wall is lower than a set temperature, heating the furnace wall firstly, and performing ceramic repair welding;
step six, dismantling and taking out the heat preservation and insulation device after the ceramic is welded and repaired on the furnace wall; heating the furnace wall of the carbonization chamber after the furnace wall is welded and repaired by ceramic, and periodically measuring and adjusting the pressure of the furnace protection iron piece spring in the heating process; after the standard vertical flame path temperature reaches the standard, coal is loaded, the condition of ignition and blowby of the vertical flame paths of the combustion chambers at the two sides of the carbonization chamber after the coal is loaded is observed, and if the problem exists, the problem is treated in time;
The discharge amount of a mixer used for welding and repairing the deep vertical flame path is 30 kg/h; the pressure of the oxygen is 0.15-0.2 MPa; the mixer comprises a mixing chamber mixing section, a mixing chamber shrinking section and a mixing chamber expanding section which are sequentially communicated, wherein a discharge hole is formed in the tail end of the mixing chamber expanding section, a feed inlet is formed in one side of the mixing chamber mixing section, and an oxygen nozzle is communicated with one end, far away from the discharge hole, of the mixing chamber mixing section; an overflow hole is formed in the mixing section of the mixing chamber; the diameter of the oxygen nozzle is 6mm; the total length of the mixer is 195mm, the diameter of the contraction section of the mixing chamber is 12mm, and the length is 115mm; the diameter of the outlet of the expansion section of the mixing chamber is 14mm, and the length is 35mm; the ceramic welding repair material for the deep vertical flame path welding repair comprises the following components in proportion: 45-58 parts of fused quartz with the granularity of 0.1-2mm, 16-22 parts of fused white corundum with the granularity of 0.04-0.1 mm, 20-32 parts of calcium stabilized zirconia with the granularity of less than 100 meshes, and 6-10 parts of metal silicon powder with the granularity of 300-500 meshes;
The flow guide holes comprise six first flow guide holes uniformly arranged on the flow guide sheet in a surrounding mode; the first diversion hole comprises a horn-shaped upper channel and a lower channel which are obliquely arranged, and the bottom of the upper channel is communicated with the top of the lower channel;
The flow guide hole also comprises a second flow guide hole positioned at the center of the flow guide sheet, and the second flow guide hole is of a vertical horn-shaped structure;
the guide vane is arranged at the position of the air inlet at the top of the nozzle, the upper part of the nozzle is of a bell-mouth structure with gradually reduced diameter, and the diameter of the lower part of the nozzle is gradually enlarged.
2. The method for ceramic repair welding of a deep vertical flame path furnace wall of a coke oven carbonization chamber according to claim 1, wherein the method comprises the following steps: the diameter of the upper end of the second diversion hole is 12mm, and the diameter of the lower end of the second diversion hole is 7.5mm; the depth of the upper channel is 5mm, the top diameter of the upper channel is 12mm, the bottom diameter of the upper channel is 7.5mm, the diameter of the lower channel is 7.5mm, and the lower channel is an inclined hole structure with the depth of 10mm and the inclination of 30 degrees.
3. The method for ceramic repair welding of a deep vertical flame path furnace wall of a coke oven carbonization chamber according to claim 1, wherein the method comprises the following steps: the diameter of the largest position of the air inlet at the upper part of the nozzle is 50mm, the narrowest part of the diameter of the upper part of the nozzle is 15mm, and the diameter of the air outlet at the lowest part of the lower part of the nozzle is 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948148.8A CN115707757B (en) | 2021-08-18 | 2021-08-18 | Ceramic repair welding method for deep vertical flame path furnace wall of coke oven carbonization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948148.8A CN115707757B (en) | 2021-08-18 | 2021-08-18 | Ceramic repair welding method for deep vertical flame path furnace wall of coke oven carbonization chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115707757A CN115707757A (en) | 2023-02-21 |
| CN115707757B true CN115707757B (en) | 2024-05-03 |
Family
ID=85212450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110948148.8A Active CN115707757B (en) | 2021-08-18 | 2021-08-18 | Ceramic repair welding method for deep vertical flame path furnace wall of coke oven carbonization chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115707757B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08261657A (en) * | 1995-03-27 | 1996-10-11 | Daiken Trade & Ind Co Ltd | Vertical burning furnace |
| CN2250818Y (en) * | 1996-01-03 | 1997-04-02 | 中国科学院力学研究所 | Spiral-flow jeting type liquid distributor |
| JP2005029585A (en) * | 2003-07-07 | 2005-02-03 | Jfe Steel Kk | Method for repairing carbonization chamber of coke oven |
| CN102424753A (en) * | 2011-10-27 | 2012-04-25 | 马钢(集团)控股有限公司 | Method for repairing bricks at bottom of carbonization chamber of large coke oven |
| CN203702226U (en) * | 2013-12-16 | 2014-07-09 | 上海寄亚机电模具科技有限公司 | Mine working plane local cooler |
| CN104498059A (en) * | 2014-11-15 | 2015-04-08 | 马钢(集团)控股有限公司 | Repairing protection apparatus of coke oven charing chamber, production method thereof and repairing method of charing chamber |
| CN108661861A (en) * | 2017-04-01 | 2018-10-16 | 许炎军 | Artificial spout system and power generation, ecological building, hydrogen station, radical cure haze technology |
| CN109181716A (en) * | 2018-10-11 | 2019-01-11 | 攀钢集团西昌钢钒有限公司 | A kind of coke oven furnace wall perforation fast repairing method |
| CN208998556U (en) * | 2018-09-28 | 2019-06-18 | 嘉峪关市长城望宇炉业有限责任公司 | The blender that ceramic welding-repairing machine uses |
| CN209206424U (en) * | 2018-11-05 | 2019-08-06 | 秦皇岛鸿通机械有限公司 | Low pressure casting Temperature Field Control system |
| CN111269008A (en) * | 2020-02-24 | 2020-06-12 | 嘉峪关市长城望宇炉业有限责任公司 | Zirconium-containing ceramic welding material for hot repair and sealing of coke oven wall and repair method |
| CN213984558U (en) * | 2020-12-16 | 2021-08-17 | 石嘴山市开盛炭素有限公司 | Calcining furnace for producing carbon products and comprehensively utilizing waste heat |
-
2021
- 2021-08-18 CN CN202110948148.8A patent/CN115707757B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08261657A (en) * | 1995-03-27 | 1996-10-11 | Daiken Trade & Ind Co Ltd | Vertical burning furnace |
| CN2250818Y (en) * | 1996-01-03 | 1997-04-02 | 中国科学院力学研究所 | Spiral-flow jeting type liquid distributor |
| JP2005029585A (en) * | 2003-07-07 | 2005-02-03 | Jfe Steel Kk | Method for repairing carbonization chamber of coke oven |
| CN102424753A (en) * | 2011-10-27 | 2012-04-25 | 马钢(集团)控股有限公司 | Method for repairing bricks at bottom of carbonization chamber of large coke oven |
| CN203702226U (en) * | 2013-12-16 | 2014-07-09 | 上海寄亚机电模具科技有限公司 | Mine working plane local cooler |
| CN104498059A (en) * | 2014-11-15 | 2015-04-08 | 马钢(集团)控股有限公司 | Repairing protection apparatus of coke oven charing chamber, production method thereof and repairing method of charing chamber |
| CN108661861A (en) * | 2017-04-01 | 2018-10-16 | 许炎军 | Artificial spout system and power generation, ecological building, hydrogen station, radical cure haze technology |
| CN208998556U (en) * | 2018-09-28 | 2019-06-18 | 嘉峪关市长城望宇炉业有限责任公司 | The blender that ceramic welding-repairing machine uses |
| CN109181716A (en) * | 2018-10-11 | 2019-01-11 | 攀钢集团西昌钢钒有限公司 | A kind of coke oven furnace wall perforation fast repairing method |
| CN209206424U (en) * | 2018-11-05 | 2019-08-06 | 秦皇岛鸿通机械有限公司 | Low pressure casting Temperature Field Control system |
| CN111269008A (en) * | 2020-02-24 | 2020-06-12 | 嘉峪关市长城望宇炉业有限责任公司 | Zirconium-containing ceramic welding material for hot repair and sealing of coke oven wall and repair method |
| CN213984558U (en) * | 2020-12-16 | 2021-08-17 | 石嘴山市开盛炭素有限公司 | Calcining furnace for producing carbon products and comprehensively utilizing waste heat |
Non-Patent Citations (4)
| Title |
|---|
| 切斯特斯.耐火材料生产和性能.冶金工业出版社,1982,91. * |
| 干法气化技术简介;彭启蒙;胡宇锋;刘智;;科技信息(科学教研);20080810(第23期);705 * |
| 陶瓷焊补技术在3#焦炉上的运用;刘武镛;2010年全国能源环保生产技术会议;406-408 * |
| 黄小广.井巷工程.煤炭工业出版社,2015,53. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115707757A (en) | 2023-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106287725B (en) | The low NOx flat flame heat-accumulating burner of grading combustion technology | |
| CN115707757B (en) | Ceramic repair welding method for deep vertical flame path furnace wall of coke oven carbonization chamber | |
| CN103438438A (en) | Method and device for preventing membrane water wall type boiler from high-temperature corrosion and coking | |
| CN205556724U (en) | A smooth hammer of improved generation for quick replacement blast -furnace tuyere | |
| CN108165284A (en) | A kind of anaerobic retort | |
| CN103710034B (en) | Thermal state replacement and maintenance method for heat recovery coke oven gas collector | |
| CN106032469A (en) | Coke oven regenerative chamber checker brick on-line replacing method | |
| CN109181716A (en) | A kind of coke oven furnace wall perforation fast repairing method | |
| CN110540842B (en) | Furnace body repairing method for recycling coke oven after overall shutdown | |
| CN201373394Y (en) | Novel powdered coal burner | |
| CN105502337B (en) | Vehicle type roaster and the heat-treatment production line for including vehicle type roaster | |
| CN107805679B (en) | A kind of blast-furnace tuyere burn after rapid plugging method | |
| CN111996325B (en) | Method and tool for quickly cleaning burner of hot blast stove | |
| CN208517340U (en) | A kind of anaerobic retort | |
| CN203373152U (en) | Integrated burner type waste acid cracking furnace | |
| KR100545844B1 (en) | Method for manufacturing impacted bricks and their kilns | |
| CN201289087Y (en) | Four-cavity-in-one self thermal storage burner | |
| CN216868537U (en) | Direct-viewing type flame industrial TV monitor | |
| CN104673335B (en) | Stepped heat storage co-firing chamber smoke suppressing energy saving vehicle | |
| CN105371483B (en) | Unfired tube is without brick atmospheric pressure water heating coal boiler | |
| CN210532366U (en) | Heat accumulating type radiant tube burner with flue gas backflow function | |
| JPS6314033B2 (en) | ||
| CN115536245B (en) | Method for hot-state replacement of grid body of float glass melting furnace | |
| CN213202917U (en) | Cleaning device suitable for coke oven chute | |
| CN211424693U (en) | Hot-blast stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |