CN113462403B - Sealing method for furnace head of combustion chamber of on-line production coke oven - Google Patents
Sealing method for furnace head of combustion chamber of on-line production coke oven Download PDFInfo
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- CN113462403B CN113462403B CN202010242338.3A CN202010242338A CN113462403B CN 113462403 B CN113462403 B CN 113462403B CN 202010242338 A CN202010242338 A CN 202010242338A CN 113462403 B CN113462403 B CN 113462403B
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- protection plate
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- 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
- C10B25/00—Doors or closures for coke ovens
- C10B25/02—Doors; Door frames
- C10B25/16—Sealing; Means for sealing
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Abstract
A sealing method for a furnace head of a combustion chamber of an on-line production coke furnace comprises the following steps: 1) Drilling a furnace head of the combustion chamber; 2) The furnace head of the combustion chamber is sealed by air pressure; 3) Grouting the furnace head of the combustion chamber, namely extending the slurry into the bottom of a drilled hole of the furnace head of the combustion chamber through a slurry spraying pipe, and performing grouting twice until the slurry is completely sealed; and then plugging the grouting hole by using a pouring material, driving a ceramic fiber rope into the upper parts of the protective plate and the furnace end, and then building an upper furnace end brick. According to the method, by injecting the sealing material between the furnace end of the furnace wall of the combustion chamber and the large protection plate, filling the grouting material with high fluidity and pressing the grouting material in, the large and small gaps between the furnace end of the carbonization chamber and the protection plate, which are caused by long-term production, are effectively plugged, so that the furnace end is sealed, the raw gas is prevented from overflowing, and the operation environment is protected.
Description
Technical Field
The invention relates to a coke oven technology, in particular to a method for sealing a furnace head of a combustion chamber of an on-line production coke oven.
Background
In the middle and later periods of the coke oven life, abnormal phenomena such as uneven furnace body expansion, furnace wall deformation, protection plate fracture and the like are generated in the combustion chamber of the coke oven to different degrees, and when the phenomena occur, the coke oven in operation can generate furnace end crude gas overflow; that is, in the normal production process of the coke oven, after the combustion chamber is charged with coal, the coal material in the combustion chamber begins to decompose due to heating, raw coke oven gas formed by various components in the coal material is rapidly generated, the gas pressure in the combustion chamber is increased, and the raw coke oven gas overflows due to the fact that the furnace wall is not tightly sealed. Particularly, after the production time of the coke oven is long, the raw gas at the position overflows more seriously after cracks appear due to the breakage of the large protection plate and large gaps are generated between the protection plate and the brickwork of the oven head of the coke oven, and the influence on the production operation environment is particularly serious.
Raw gas can overflow from the furnace ends of the combustion chambers in the middle and later stages of service of the coke oven, and the main reasons are as follows:
(1) the large protection plate and the masonry are separated due to long-term mechanical impact, so that the sealing performance of the burner of the combustion chamber is reduced.
(2) The big protection shield breaks to different degrees, has accelerated the reduction of combustion chamber furnace end degree of sealing.
The following measures are currently taken for the problems that arise above:
1. a method for temporarily blocking ceramic fiber cotton at the overflow part of the raw gas is adopted.
Because the large protection plate is arranged between the furnace body and the steel column, the smoke can not be completely eliminated; meanwhile, after 1-2 times of mechanical impact in production operation, the large protection plate is separated from the coke oven masonry, so that the raw coke oven gas of the coke oven overflows. The ceramic fiber cotton and the slurry are plugged at the position where the raw gas overflows after being removed, and the method belongs to a temporary plugging measure. After 1-2 production operations, the phenomenon of raw gas overflow repeatedly occurs, leakage cannot be eradicated from the source, and the treatment of the surface and the treatment of the root cause are not permanent. The large protection plate is cracked due to mechanical vibration and high temperature in the production process for a long time, so that raw coke oven gas overflows.
2. The protection plate is replaced.
Every time the large protection plate of the combustion chamber with 1 hole is replaced, the steel column must be firstly dismantled, and the production of the combustion chambers with two adjacent holes is stopped for three days, so that the production of the coke oven is influenced, and the coke oven wastes time and labor and has huge cost. Meanwhile, the coke oven needs to be cooled in the replacement process, which in turn affects the tightness of the coke oven masonry and still causes the phenomenon of raw coke oven gas overflow.
Disclosure of Invention
The invention aims to provide a sealing method for the furnace head of a combustion chamber of an on-line production coke oven, which can quickly, effectively and safely seal the gap of the furnace head of the combustion chamber of the coke oven and eliminate the phenomenon of raw gas overflow caused by incompactness between the furnace wall of the combustion chamber and a furnace head protection plate.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a sealing method for the furnace head of a combustion chamber of an on-line production coke oven comprises the following steps:
1) Drilling of burner of combustion chamber
Determination of the drill hole position: firstly, removing furnace end bricks on the upper part of a coke oven combustion chamber on the broken large protection plate, drilling holes at the position of a grouting hole between the large protection plate and the furnace end during furnace building, determining the diameter of the drilled holes according to the size of the grouting hole, and determining the depth of the drilled holes according to the shape of the coke oven, the smoke-emitting part of the furnace end and the breaking position of the large protection plate, wherein the maximum depth of the drilled holes cannot exceed the bottom of the large protection plate;
2) Air pressure seal for furnace head of combustion chamber
Extending a heat-resistant rubber pipe from the upper part of a large protection plate with a drilled hole to the bottom of the hole, and compacting and sealing the upper part of the large protection plate around the heat-resistant rubber pipe by using a ceramic fiber rope; the sealing material is blown into the drilled hole through compressed air and gradually permeates into cracks of a masonry and a large protection plate of the coke oven head to seal the small cracks; meanwhile, the sealing material can overflow from a larger gap between the furnace end of the combustion chamber and the large protection plate through the pressing-in of the sealing material, and the position and the size of the furnace end of the coke oven which leaks are easy to judge according to the overflow amount of the sealing material;
3) Burner mud jacking of combustion chamber
The guniting pipe extends into the bottom of a drilled hole of the burner of the combustion chamber, and the upper part of the large protection plate is compacted and sealed by ceramic fiber ropes at the periphery of the guniting pipe;
grouting for the first time: the mortar specific gravity of the slurry is 1.3 to 1.6g/cm 3 When slurry overflows from the upper part of the furnace end or the large protection plate of the combustion chamber, the operation can be stopped, and the furnace end or the large protection plate is kept still for 5 to 10 minutes;
second grouting: the mortar specific gravity of the slurry is 1.6 to 1.9g/cm 3 When the second grouting is carried out, the guniting pipe is lifted while pressing the edge until the slurry overflows from the drilling position at the upper part of the large protection plate, the shrinkage and cracking conditions of the slurry are checked after the slurry is static for more than or equal to 30 minutes, and the guniting pipe is extended into the large protection plate for slurry supplement if necessary until the slurry is completely sealed; and then plugging the grouting hole by using a pouring material, driving ceramic fiber ropes into the large protective plate and the upper part of the furnace end, and then building an upper furnace end brick.
Preferably, the casting material is a clay casting material or a casting material.
The invention relates to a sealing method for the furnace head of a combustion chamber of an on-line production coke oven, which comprises the following steps:
the air pressure sealing of the combustion chamber furnace head is the first step of the combustion chamber furnace head sealing, the sealing material can overflow from a larger gap between the combustion chamber furnace head and the large protection plate through the pressing-in of the sealing material, the position and the size of the coke furnace head leakage can be easily judged according to the overflow amount of the sealing material, and the technical basis is passed for the next operation. The function is as follows: 1. the tiny gap can be sealed, and 2, the position and the size of the blowby are determined through the phenomenon that the overflowing white air presses the sealing powder.
And after the air compression sealing of the furnace end of the combustion chamber is finished, carrying out mud jacking sealing on the large gap and the gap between the furnace end and the large protection plate, which is the second step of sealing the furnace end of the combustion chamber. Because the slurry has certain fluidity and is relatively quickly solidified in a high-temperature environment, tight and thick slurry can be formed between the furnace end brickwork of the coke oven and the protective plate, and the sealing effect is achieved.
The invention has the beneficial effects that:
the method effectively plugs the large and small gaps between the furnace end of the carbonization chamber and the protection plate caused by long-term production by injecting the sealing material, pouring the grouting material with higher fluidity and pressing the grouting material into the space between the furnace end of the furnace wall of the combustion chamber and the large protection plate, thereby achieving the purpose of sealing the furnace end, avoiding the overflow of the raw gas and protecting the operating environment.
The invention can prevent the raw gas at the head part of the coke oven from overflowing, protect the coke oven working environment, simultaneously avoid the corrosion and burning loss of the oven protection iron piece due to poor sealing performance of the coke oven head, overflow and burning of the raw gas and the like, play a role in protecting the oven protection iron piece and the oven wall and prolong the service life of the coke oven.
The invention discloses a method for maintaining the sealing of a furnace end of a combustion chamber of an on-line production coke oven, which is initiated in domestic and foreign industries.
The maintenance method of the invention has no influence on the production of the coke oven.
The method effectively seals the separated part of the large protection plate and the coke oven masonry, and eliminates leakage from the source.
The method has low maintenance cost.
Drawings
FIG. 1 is a side view of a coke oven combustion chamber.
FIG. 2 is a top view of a coke oven combustion chamber.
In the figure, 1 is a coke oven, 2 is a large protection plate, 3 and 3' are steel columns, 4 is a coke oven masonry, 5 is a coke oven upper brace, 6 is an upper spring, 7 is a coke oven lower brace, 8 is a lower spring, 9 is a grouting hole, and 10 is a fiber rope.
Detailed Description
Referring to fig. 1 and 2, the method for sealing the head of the combustion chamber of the on-line production coke oven comprises the following steps:
1) Drilling of burner of combustion chamber
Determination of the position of the borehole: firstly, dismantling furnace end bricks on the upper part of a combustion chamber of a coke oven 1 on the upper part of a large broken protection plate 2, drilling holes at the position of a grouting hole between the large protection plate 2 and the furnace end when the coke oven is built, determining the size of the diameter of the drilled holes according to the size of the grouting hole, determining the depth of the drilled holes according to the shape of the coke oven, the position of the furnace end which smokes and the broken position of the large protection plate, wherein the maximum depth of the drilled holes cannot exceed the bottom of the large protection plate 2;
2) Air pressure seal for furnace head of combustion chamber
Extending a heat-resistant rubber pipe from the upper part of a large protection plate 2 with a drilled hole to the bottom of the hole, and compacting and sealing the upper part of the large protection plate 2 around the heat-resistant rubber pipe by using a ceramic fiber rope; the sealing material is blown into the drilled hole through compressed air and gradually permeates into cracks of a masonry and a large protection plate of the coke oven head to seal the small cracks; meanwhile, the sealing material can overflow from a larger gap between the furnace end of the combustion chamber and the large protection plate through the pressing-in of the sealing material, and the position and the size of the through leakage of the furnace end of the coke oven can be easily judged according to the overflow amount of the sealing material;
3) Burner mud jacking of combustion chamber
The guniting pipe extends into the bottom of a drilled hole of the burner of the combustion chamber, and the upper part of the large protection plate is compacted and sealed by ceramic fiber ropes at the periphery of the guniting pipe;
grouting for the first time: the mortar specific gravity of the slurry is 1.3 to 1.6g/cm 3 When slurry overflows from the upper part of the furnace end or the large protection plate of the combustion chamber, the operation can be stopped, and the furnace end or the large protection plate is kept still for 5 to 10 minutes;
second grouting: the mortar specific gravity of the slurry is 1.6 to 1.9g/cm 3 When the second grouting is carried out, the guniting pipe is lifted while pressing the edge until the slurry overflows from the drilling position at the upper part of the large protection plate, the shrinkage and cracking conditions of the slurry are checked after the slurry is static for more than or equal to 30 minutes, and the guniting pipe is extended into the large protection plate for slurry supplement if necessary until the slurry is completely sealed; and then plugging the grouting hole by using a pouring material, driving a ceramic fiber rope into the large protective plate and the upper part of the furnace end, and then building an upper furnace end brick.
Preferably, the casting material is a clay casting material or a casting material.
With the increasing environmental protection situation of the coking industry, the valves of the coke oven, such as long service life, stable production, energy conservation and the like, are more and more emphasized, the human resources are more and more scarce, and a plurality of heavy physical work can be more and more insufficient, so the invention has the advantages of strong practicability, small investment, large effect and good popularization prospect.
Claims (2)
1. A sealing method for a furnace head of a combustion chamber of an on-line production coke oven is characterized by comprising the following steps:
1) Combustion chamber furnace end drilling
Determination of the position of the borehole: firstly, removing furnace end bricks on the upper part of a coke oven combustion chamber on the broken large protection plate, drilling holes at the position of a grouting hole between the large protection plate and the furnace end during furnace building, determining the diameter of the drilled holes according to the size of the grouting hole, and determining the depth of the drilled holes according to the shape of the coke oven, the smoke-emitting part of the furnace end and the breaking position of the large protection plate, wherein the maximum depth of the drilled holes cannot exceed the bottom of the large protection plate;
2) Air pressure seal for burner of combustion chamber
Extending a heat-resistant rubber pipe from the upper part of a large protection plate with a drilled hole to the bottom of the hole, and compacting and sealing the upper part of the large protection plate around the heat-resistant rubber pipe by using a ceramic fiber rope; the sealing material is blown into the drilled hole through compressed air and gradually permeates into the brickwork of the coke oven head and the crack of the large protection plate to seal the small crack; meanwhile, the sealing material can overflow from a larger gap between the furnace end of the combustion chamber and the large protection plate through the pressing-in of the sealing material, and the position and the size of the furnace end of the coke oven which leaks are easy to judge according to the overflow amount of the sealing material;
3) Burner mud jacking of combustion chamber
The guniting pipe extends into the bottom of a drilled hole of the burner of the combustion chamber, and the upper part of the large protection plate is compacted and sealed by ceramic fiber ropes at the periphery of the guniting pipe;
grouting for the first time: the mortar specific gravity of the slurry is 1.3 to 1.6g/cm 3 When slurry overflows from the upper part of the furnace end or the large protection plate of the combustion chamber, stopping and standing for 5 to 10 minutes;
and (3) second grouting: the mortar specific gravity of the slurry is 1.6 to 1.9g/cm 3 When the mortar is pressed for the second time, lifting the mortar spraying pipe while pressing the edge until the mortar overflows from the drilling position at the upper part of the large protection plate, standing for more than or equal to 30 minutes, checking the shrinkage and cracking conditions of the mortar, and if necessary, extending the mortar spraying pipe into the mortar spraying pipe for mortar supplement until the mortar is completely sealed; and then plugging the grouting hole by using a pouring material, driving a ceramic fiber rope into the large protective plate and the upper part of the furnace end, and then building an upper furnace end brick.
2. The method for sealing the burner of the combustion chamber of the coke oven in the online production as set forth in claim 1, wherein the castable is clay castable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010242338.3A CN113462403B (en) | 2020-03-31 | 2020-03-31 | Sealing method for furnace head of combustion chamber of on-line production coke oven |
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| CN202010242338.3A CN113462403B (en) | 2020-03-31 | 2020-03-31 | Sealing method for furnace head of combustion chamber of on-line production coke oven |
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| CN113462403A CN113462403A (en) | 2021-10-01 |
| CN113462403B true CN113462403B (en) | 2023-01-20 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364798A (en) * | 1980-12-30 | 1982-12-21 | Bmi, Inc. | Rebuilt coke oven heating chamber and method of making the same |
| DE19521208C1 (en) * | 1995-06-13 | 1996-12-19 | Ivt Weiner & Reimann Gmbh | Sealing cracks in brickwork joints in coke oven regenerator partition walls |
| CN102146294A (en) * | 2011-02-23 | 2011-08-10 | 中冶焦耐(大连)工程技术有限公司 | Method for increasing air tightness of coke oven top and oven top structure |
| CN202016977U (en) * | 2011-02-23 | 2011-10-26 | 中冶焦耐(大连)工程技术有限公司 | Oven top structure for coke oven |
| CN104232110A (en) * | 2013-06-20 | 2014-12-24 | 宝山钢铁股份有限公司 | Sealing method of furnace body before primary coal charging of newly built coke furnace |
| CN110759740A (en) * | 2018-07-27 | 2020-02-07 | 宝山钢铁股份有限公司 | Sealing filler for cavity between coke oven protection plate and oven door frame |
-
2020
- 2020-03-31 CN CN202010242338.3A patent/CN113462403B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4364798A (en) * | 1980-12-30 | 1982-12-21 | Bmi, Inc. | Rebuilt coke oven heating chamber and method of making the same |
| DE19521208C1 (en) * | 1995-06-13 | 1996-12-19 | Ivt Weiner & Reimann Gmbh | Sealing cracks in brickwork joints in coke oven regenerator partition walls |
| CN102146294A (en) * | 2011-02-23 | 2011-08-10 | 中冶焦耐(大连)工程技术有限公司 | Method for increasing air tightness of coke oven top and oven top structure |
| CN202016977U (en) * | 2011-02-23 | 2011-10-26 | 中冶焦耐(大连)工程技术有限公司 | Oven top structure for coke oven |
| CN104232110A (en) * | 2013-06-20 | 2014-12-24 | 宝山钢铁股份有限公司 | Sealing method of furnace body before primary coal charging of newly built coke furnace |
| CN110759740A (en) * | 2018-07-27 | 2020-02-07 | 宝山钢铁股份有限公司 | Sealing filler for cavity between coke oven protection plate and oven door frame |
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