CN113528161A - Coke oven uncovering and overhauling blowby-free control method - Google Patents
Coke oven uncovering and overhauling blowby-free control method Download PDFInfo
- Publication number
- CN113528161A CN113528161A CN202110890984.5A CN202110890984A CN113528161A CN 113528161 A CN113528161 A CN 113528161A CN 202110890984 A CN202110890984 A CN 202110890984A CN 113528161 A CN113528161 A CN 113528161A
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- furnace
- overhauling
- carbonization
- carbonization chamber
- masonry
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- 239000000571 coke Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 19
- 238000012423 maintenance Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 238000003763 carbonization Methods 0.000 claims description 72
- 238000002485 combustion reaction Methods 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000004939 coking Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000003245 coal Substances 0.000 claims description 9
- 239000011449 brick Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 210000003128 head Anatomy 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
- C10B29/06—Preventing or repairing leakages of the brickwork
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a control method without leakage during the uncovering and overhauling of a coke oven, which improves the uncovering and overhauling process of the coke oven, adopts the technologies of temperature reduction control, oven wall heat preservation, steel column supporting and reinforcing, masonry control, temperature rise, thermal state engineering, sealing with coke air pressure, nitrogen pressure maintaining, fire pressing inspection and ceramic welding repair to improve the maintenance effect on the oven wall of the coke oven, and can ensure that the leakage does not occur after the oven wall of the coke oven is overhauled and put into production, the maintenance quality is effectively improved, and the stable and smooth operation of the coke oven is ensured.
Description
Technical Field
The invention relates to the technical field of coking processes, in particular to a method for controlling uncovering and overhauling of a coke oven without leakage.
Background
In the coking production, the vertical flame path of the coke oven wall is easy to be seriously damaged due to various reasons, the furnace wall can not be repaired by patching, and only the silica bricks from the bottom to the top of the coking chamber can be completely removed after the temperature is reduced, and then the furnace wall is re-built for uncovering, overturning and repairing. The temperature of the silica bricks is as high as 1200-1300 ℃, and the adjacent non-overhaul combustion chambers can generate larger thermal stress due to temperature reduction, so that the furnace walls are cracked, cracked and leaked; the general overhaul period is as long as 10-15 days, the coking time of adjacent non-overhaul carbonization chambers is long, the pressure in the carbonization chambers is negative, and coal gas in the combustion chambers leaks into the carbonization chambers to be combusted, so that the adjacent non-overhaul carbonization chambers leak. Therefore, when the furnace wall is uncovered and repaired, the repair combustion chamber and the adjacent non-repair combustion chamber joint part have blowby, the repair effect is seriously influenced, and the repair quality is not easy to meet the requirement
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the control method for the uncovering and overhauling of the coke oven without the leakage is provided, the maintenance quality can be improved, and the leakage can not occur after the maintenance furnace wall is put into production.
In order to solve the technical problems, the invention adopts the technical scheme that: the control method of the coke oven uncovering and overhauling without leakage comprises the following steps:
step one, arranging a stuffy oven carbonization chamber and two buffer carbonization chambers on two sides of a carbonization chamber to be overhauled respectively, wherein the stuffy oven carbonization chamber, the buffer carbonization chambers and adjacent non-overhauled combustion chambers are heated by coke oven gas;
secondly, reinforcing the furnace column of the turnover carbonization chamber;
thirdly, the combustion chamber is overhauled and stopped from heating, the heating amount of the non-overhauled combustion chamber, the smoldering furnace carbonization chamber and the buffering carbonization chamber is reduced, the temperature of the vertical flame path of the adjacent non-overhauled combustion chamber is kept above 800 ℃, the temperatures of the smoldering furnace carbonization chamber and the vertical flame path of the combustion chamber are kept at 900-1100 ℃, 1200 ℃ and 1320 ℃ in sequence, and when the temperature of the overhauled vertical flame path is lower than 800 ℃, two fire walls are placed in the overhauling carbonization chamber;
step four, removing the old silica bricks in a step shape from the top of the furnace to the bottom of the carbonization chamber, arranging support protection while removing, enabling the supports to be crossed vertically and horizontally, and performing front heat preservation, sealing and supporting on the part of the observation hole with the exposed buffer furnace number during removal;
fifthly, marking a control line for each layer of masonry on the protection plate, marking an arrangement control line at the bottom of the carbonization chamber, and performing masonry according to the marked control line;
step six, heating and baking the upper furnace door by using the heat of the vertical flue of the non-overhaul combustion chamber after the masonry is finished, conveying coke oven gas to the overhaul vertical flue to ignite and continue heating when the temperature is raised to 650 ℃, and performing thermal state work such as protective plate grouting, small furnace head masonry, furnace top grouting, cylinder brick masonry, brace groove filling heat preservation powder and the like when the masonry of the overhaul vertical flue is raised to more than 750 ℃;
seventhly, carrying out coke air pressure sealing on adjacent stuffy furnace carbonization chambers, and carrying out nitrogen pressure maintaining on the adjacent stuffy furnace carbonization chambers during maintenance;
step eight, when the temperature of the maintenance vertical flue rises to 1100 ℃, the furnace door is taken off, the fire wall is dismantled, and the bottom of the carbonization chamber is cleaned;
step nine, after the fire-blocking wall is removed, adjusting waste gas disk openers and closers on two sides of the overhaul combustion chamber, reducing the fire absorption pressure, observing whether the joint part has the blowby with naked eyes, if the blowby is found, maintaining the blowby part, and then performing fire suppression check until no blowby exists;
step ten, maintaining the vertical flue, continuously heating to 1200 ℃, and loading coal, coking and putting into production.
Further, the method comprises the following steps: in the first step, the coking time of the two buffer coking chambers is respectively 48 hours and 24 hours.
Further, the method comprises the following steps: and in the second step, the upper ends of the coke side furnace columns are fixed together by I-shaped steel during reinforcement, meanwhile, cross braces at the coke side of the combustion chamber are welded and fixed on the corresponding furnace columns, and the protection plate and the furnace columns are welded into a whole.
Further, the method comprises the following steps: in the third step, the width of the first fire-blocking wall is 20mm wider than that of the overhauling carbonization chamber, and the height of the first fire-blocking wall is the same as the height of the overhung part of the overhauling carbonization chamber; the second fire-blocking wall is placed when the adjacent wall is insulated, and the ceramic fiber blanket is attached to the furnace wall of the adjacent wall to insulate heat while the second fire-blocking wall is placed.
Further, the method comprises the following steps: in the fifth step, the zero expansion is adopted for masonry as a refractory material, and refractory mortar is fed from a side furnace mouth during masonry; the masonry slurry is full, the perpendicularity is in direct connection with the protection plate and the connecting wall, the connecting wall is slightly recessed by 1-2 mm in depth, and 15mm expansion joints are reserved for every 1 m of masonry.
Further, the method comprises the following steps: in the seventh step, when the adjacent smoldering furnace carbonization chambers are sealed by coke air pressure, the air pressure sealing material is blown in from a coal charging port of the smoldering furnace carbonization chamber by using 0.4MPa compressed air for 30 minutes each time, and then the process is continuously repeated for 1-2 times after stopping for 1.5 hours; when nitrogen pressure maintaining is carried out on adjacent smoldering furnace carbonization chambers, a nitrogen pipe with the diameter of 30mm is paved from the furnace chamber platform, the nitrogen pipe is connected from a coal charging port of the smoldering furnace carbonization chamber, nitrogen is introduced into the smoldering furnace carbonization chamber, and the nitrogen pressure is kept at 240 Pa.
The invention has the beneficial effects that: according to the invention, the coke oven uncovering and overturning maintenance process is improved, and the maintenance effect on the oven wall of the coke oven is improved by adopting the technologies of cooling control, oven wall heat preservation, steel column support reinforcement, masonry control, temperature rise, thermal engineering, sealing with coke air pressure, nitrogen pressure maintaining, fire pressing inspection and ceramic welding repair, so that the coke oven wall can be maintained without leakage after the coke oven wall is maintained and put into production, the maintenance quality is effectively improved, and the stable and smooth operation of the coke oven is ensured.
Drawings
FIG. 1 is a process flow diagram of the present invention;
Detailed Description
In order to facilitate understanding of the invention, the invention is further described below with reference to the accompanying drawings and examples.
Examples
As shown in FIG. 1, the control method for uncovering, repairing and repairing the coke oven without leakage disclosed by the invention is implemented according to the following steps:
step one, arranging a smoldering carbonization chamber and two buffering carbonization chambers on two sides of a carbonization chamber to be overhauled respectively, wherein combustion chambers are arranged among the smoldering carbonization chamber, the buffering chambers and the overhauling carbonization chambers, the smoldering carbonization chamber, the buffering carbonization chambers and adjacent non-overhauled combustion chambers are heated by coke oven gas, and the coking time of the two buffering carbonization chambers is respectively 48 hours and 24 hours;
secondly, reinforcing the oven columns of the turning and repairing carbonization chambers, fixing the upper ends of the oven columns at the machine coke side together by I-shaped steel during reinforcing, welding and fixing cross braces at the machine coke side of the combustion chamber on the corresponding oven columns, and spot-welding the protection plates and the oven columns into a whole;
thirdly, the combustion chamber is overhauled and stopped from heating, the heating amount of the non-overhauled combustion chamber, the smoldering furnace carbonization chamber and the buffering carbonization chamber is reduced, the temperature of the vertical flame path of the adjacent non-overhauled combustion chamber is kept above 800 ℃, the temperatures of the smoldering furnace carbonization chamber and the vertical flame path of the combustion chamber are kept at 900-1100 ℃, 1200 ℃ and 1320 ℃ in sequence, and when the temperature of the overhauled vertical flame path is lower than 800 ℃, two fire walls are placed in the overhauling carbonization chamber; the width of the first fire-blocking wall is 20mm wider than that of the overhauling carbonization chamber, and the height of the first fire-blocking wall is the same as the overhead height of the overhauling carbonization chamber; the second fire-blocking wall is placed when the furnace wall is insulated, and the ceramic fiber blanket is attached to the furnace wall of the adjacent wall for insulation while the second fire-blocking wall is placed;
step four, removing the old silica bricks in a step shape from the top of the furnace to the bottom of the carbonization chamber, arranging support protection while removing, enabling the supports to be crossed vertically and horizontally, and performing front heat preservation, sealing and supporting on the part of the observation hole with the exposed buffer furnace number during removal;
fifthly, marking a control line for each layer of masonry on the protection plate, marking an arrangement control line at the bottom of the carbonization chamber, and performing masonry according to the marked control line; the masonry adopts zero-expansion rotation as a refractory material, and refractory mortar is fed from a side furnace mouth during masonry; building slurry is full, the verticality is connected with the protection plate and the connecting wall in the same direction, the connecting wall is slightly recessed by the depth of 1-2 mm, and a 15mm expansion joint is reserved for each 1 m of the building body;
step six, heating and baking the upper furnace door by using the heat of the vertical flue of the non-overhaul combustion chamber after the masonry is finished, conveying coke oven gas to the overhaul vertical flue to ignite and continue heating when the temperature is raised to 650 ℃, and performing thermal state work such as protective plate grouting, small furnace head masonry, furnace top grouting, cylinder brick masonry, brace groove filling heat preservation powder and the like when the masonry of the overhaul vertical flue is raised to more than 750 ℃;
seventhly, carrying out coke air pressure sealing on adjacent stuffy furnace carbonization chambers, blowing air pressure sealing materials into the adjacent stuffy furnace carbonization chambers from a coal charging port of each stuffy furnace carbonization chamber by using 0.4MPa compressed air for 30 minutes each time, and then continuously repeating for 1-2 times after stopping for 1.5 hours; performing nitrogen pressure maintaining on adjacent smoldering furnace carbonization chambers during maintenance, paving a nitrogen pipe with the diameter of 30mm from a furnace chamber, connecting the nitrogen pipe from a coal charging port of the smoldering furnace carbonization chamber, introducing nitrogen into the smoldering furnace carbonization chamber, and keeping the nitrogen pressure at 240 Pa;
step eight, when the temperature of the maintenance vertical flue rises to 1100 ℃, the furnace door is taken off, the fire wall is dismantled, and the bottom of the carbonization chamber is cleaned;
step nine, after the fire-blocking wall is removed, adjusting waste gas disk openers and closers on two sides of the overhaul combustion chamber, reducing the fire absorption pressure, observing whether the joint part has the blowby with naked eyes, if the blowby is found, maintaining the blowby part, and then performing fire suppression check until no blowby exists;
step ten, maintaining the vertical flue, continuously heating to 1200 ℃, and loading coal, coking and putting into production.
Claims (6)
1. The control method of the coke oven uncovering and overhauling without leakage is characterized in that: the method comprises the following steps:
step one, arranging a stuffy oven carbonization chamber and two buffer carbonization chambers on two sides of a carbonization chamber to be overhauled respectively, wherein the stuffy oven carbonization chamber, the buffer carbonization chambers and adjacent non-overhauled combustion chambers are heated by coke oven gas;
secondly, reinforcing the furnace column of the turnover carbonization chamber;
thirdly, the combustion chamber is overhauled and stopped from heating, the heating amount of the non-overhauled combustion chamber, the smoldering furnace carbonization chamber and the buffering carbonization chamber is reduced, the temperature of the vertical flame path of the adjacent non-overhauled combustion chamber is kept above 800 ℃, the temperatures of the smoldering furnace carbonization chamber and the vertical flame path of the combustion chamber are kept at 900-1100 ℃, 1200 ℃ and 1320 ℃ in sequence, and when the temperature of the overhauled vertical flame path is lower than 800 ℃, two fire walls are placed in the overhauling carbonization chamber;
step four, removing the old silica bricks in a step shape from the top of the furnace to the bottom of the carbonization chamber, arranging support protection while removing, enabling the supports to be crossed vertically and horizontally, and performing front heat preservation, sealing and supporting on the part of the observation hole with the exposed buffer furnace number during removal;
fifthly, marking a control line for each layer of masonry on the protection plate, marking an arrangement control line at the bottom of the carbonization chamber, and performing masonry according to the marked control line;
step six, heating and baking the upper furnace door by using the heat of the vertical flue of the non-overhaul combustion chamber after the masonry is finished, conveying coke oven gas to the overhaul vertical flue to ignite and continue heating when the temperature is raised to 650 ℃, and performing thermal state work such as protective plate grouting, small furnace head masonry, furnace top grouting, cylinder brick masonry, brace groove filling heat preservation powder and the like when the masonry of the overhaul vertical flue is raised to more than 750 ℃;
seventhly, carrying out coke air pressure sealing on adjacent stuffy furnace carbonization chambers, and carrying out nitrogen pressure maintaining on the adjacent stuffy furnace carbonization chambers during maintenance;
step eight, when the temperature of the maintenance vertical flue rises to 1100 ℃, the furnace door is taken off, the fire wall is dismantled, and the bottom of the carbonization chamber is cleaned;
step nine, after the fire-blocking wall is removed, adjusting waste gas disk openers and closers on two sides of the overhaul combustion chamber, reducing the fire absorption pressure, observing whether the joint part has the blowby with naked eyes, if the blowby is found, maintaining the blowby part, and then performing fire suppression check until no blowby exists;
step ten, maintaining the vertical flue, continuously heating to 1200 ℃, and loading coal, coking and putting into production.
2. The coke oven topping and overhauling blowby-pass control method of claim 1, which is characterized in that: in the first step, the coking time of the two buffer coking chambers is respectively 48 hours and 24 hours.
3. The coke oven topping and overhauling blowby-pass control method of claim 1, which is characterized in that: and in the second step, the upper ends of the coke side furnace columns are fixed together by I-shaped steel during reinforcement, meanwhile, cross braces at the coke side of the combustion chamber are welded and fixed on the corresponding furnace columns, and the protection plate and the furnace columns are welded into a whole.
4. The coke oven topping and overhauling blowby-pass control method of claim 1, which is characterized in that: in the third step, the width of the first fire-blocking wall is 20mm wider than that of the overhauling carbonization chamber, and the height of the first fire-blocking wall is the same as the height of the overhung part of the overhauling carbonization chamber; the second fire-blocking wall is placed when the adjacent wall is insulated, and the ceramic fiber blanket is attached to the furnace wall of the adjacent wall to insulate heat while the second fire-blocking wall is placed.
5. The coke oven topping and overhauling blowby-pass control method of claim 1, which is characterized in that: in the fifth step, the zero expansion is adopted for masonry as a refractory material, and refractory mortar is fed from a side furnace mouth during masonry; the masonry slurry is full, the perpendicularity is in direct connection with the protection plate and the connecting wall, the connecting wall is slightly recessed by 1-2 mm in depth, and 15mm expansion joints are reserved for every 1 m of masonry.
6. The coke oven topping and overhauling blowby-pass control method of claim 1, which is characterized in that: in the seventh step, when the adjacent smoldering furnace carbonization chambers are sealed by coke air pressure, the air pressure sealing material is blown in from a coal charging port of the smoldering furnace carbonization chamber by using 0.4MPa compressed air for 30 minutes each time, and then the process is continuously repeated for 1-2 times after stopping for 1.5 hours; when nitrogen pressure maintaining is carried out on adjacent smoldering furnace carbonization chambers, a nitrogen pipe with the diameter of 30mm is paved from the furnace chamber platform, the nitrogen pipe is connected from a coal charging port of the smoldering furnace carbonization chamber, nitrogen is introduced into the smoldering furnace carbonization chamber, and the nitrogen pressure is kept at 240 Pa.
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| CN202110890984.5A CN113528161B (en) | 2021-08-04 | 2021-08-04 | Control method for coke oven top uncovering repair without blowby |
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| CN202110890984.5A CN113528161B (en) | 2021-08-04 | 2021-08-04 | Control method for coke oven top uncovering repair without blowby |
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| CN113528161B (en) | 2023-11-21 |
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