CN115197723A - Method for treating blowby of coke oven brick gas duct - Google Patents
Method for treating blowby of coke oven brick gas duct Download PDFInfo
- Publication number
- CN115197723A CN115197723A CN202210905526.9A CN202210905526A CN115197723A CN 115197723 A CN115197723 A CN 115197723A CN 202210905526 A CN202210905526 A CN 202210905526A CN 115197723 A CN115197723 A CN 115197723A
- Authority
- CN
- China
- Prior art keywords
- pug
- brick gas
- gas channel
- blowby
- coke oven
- 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.)
- Granted
Links
- 239000011449 brick Substances 0.000 title claims abstract description 62
- 239000000571 coke Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000011049 filling Methods 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims abstract description 8
- 239000011378 shotcrete Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000000630 rising effect Effects 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 3
- 239000004927 clay Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
- 238000005338 heat storage Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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 method for treating blowby of a coke oven brick gas duct, which belongs to the technical field of coke ovens and comprises the following steps: s1, determining a transverse exhaust pipe where a blowby vertical flue is located, and stopping heating coke oven gas; s2, determining the size and height of gaps and holes in the brick gas channel according to the temperature in the vertical flame channel, the flame combustion condition and the flame color; s3, proportioning pug; adding 40-60% of water by weight of the pug, uniformly stirring, and standing for 2-3 hours; s4, when the airflow descends, the brick gas channel is gunned; s5, dredging the brick gas channel by using an iron drill, and then blowing the brick gas channel clean by using compressed air; adding proportioned mud into the vertical pipe according to the blowby condition of the brick gas duct; s6, determining the initial pressure of compressed air according to the specific gravity, the height and the leakage height of the pug, connecting the compressed air by a shotcrete machine, enabling the pug to rise in the brick gas channel through the compressed air, and continuously filling gaps and holes in the brick gas channel during rising of the pug.
Description
Technical Field
The invention belongs to the technical field of coke ovens, and particularly relates to a method for treating blowby of a coke oven brick gas channel.
Background
When the coke oven gas is used for heating, the coke oven gas is mixed and combusted with air entering from the chute through the brick gas channel, so that the blended coal forms coke through the high-temperature carbonization process. Because the coke oven has periodic temperature change in the normal production process, the coke oven continuously expands and contracts. Under the condition that the blowby of the coke oven brick gas channel is increasingly serious, the coke oven gas leaks into the heat storage chamber in the process of flowing through the blowby brick gas channel, and the following consequences are generated on the oven body and the production:
1. the coke oven gas leaked into the heat accumulation chamber is mixed with the air in the heat accumulation chamber for combustion, so that the local high temperature of the heat accumulation chamber is caused, lattice bricks in the heat accumulation chamber are burnt and melted, the furnace body is seriously damaged, and the service life of the furnace body is shortened.
2. Part of coke oven gas enters the shutter and then is combusted with air, so that the service cycle of the equipment is shortened.
3. Because the coke oven gas can not reach the vertical flame path and is combusted with air, the temperature of the vertical flame path is reduced, the uniform coefficient of the horizontal row of the combustion chamber does not meet the requirement, the expansion of the furnace body is not uniform, and the furnace body is damaged.
4. The low temperature of the vertical flame path makes the coke in the coking chamber grow, reduces the yield and quality of the coke, increases the coke pushing resistance and influences the normal production.
In order to solve the problems, a 'grouting method' is generally adopted to spray and repair the blowby brick gas channel. However, if the coke oven has long service time, gaps and holes in the brick gas channel are large. The slurry used by the shotcrete machine is prepared by mixing clay fire clay and a certain amount of water, the specific gravity is about 1.26, and the slurry is thinner. When the slurry is sprayed, the slurry can not fill gaps and holes, and the heating requirement can not be met after multiple times of spray repair. And the slurry flows to the heat storage chamber from the gaps and the holes to block lattice bricks in the heat storage chamber, so that the distribution of gas in the coke oven is influenced, and secondary damage is caused to the coke oven. Even if the slurry gunning brick gas duct meets the heating requirement, the clay fire clay hanging time is short, so that the leakage brick gas duct needs to be grouted repeatedly, the labor intensity of workers is greatly increased, and a large amount of refractory materials are wasted.
Disclosure of Invention
Aiming at the technical defects, the invention provides a method for treating the blowby of a coke oven brick gas duct, which adopts a mud filling method to treat the blowby part, so that a combustion chamber of a coke oven can be normally heated, coke cakes are uniform and mature, and the working state of the coke oven is improved.
In order to achieve the technical purpose, the invention is realized by the following technical scheme:
a method for treating blowby of a coke oven brick gas channel comprises the following steps:
s1, determining a transverse exhaust pipe where a blowby vertical flue is located, and stopping heating coke oven gas;
s2, determining the size and height of gaps and holes in the brick gas channel according to the temperature in the vertical flame channel, the flame combustion condition and the flame color;
s3, proportioning pug; the pug comprises clay fire clay, low-temperature silicon fire clay and high-alumina powder, and is added with 40-60 wt% of water and stirred uniformly, and then placed for 2-3 hours;
s4, when the airflow descends, the brick gas channel is gunned;
s5, dredging the brick gas channel by using an iron drill, and then blowing the brick gas channel clean by using compressed air; adding proportioned pug into the vertical pipe according to the blowby condition of the brick gas duct, wherein the height of the pug is 400-600 mm;
s6, determining the initial pressure of compressed air according to the specific gravity, the height and the blowby height of the pug, connecting the compressed air by a shotcrete machine, enabling the pug to rise in the brick gas channel through the compressed air, and continuously filling gaps and holes in the brick gas channel with the pug in the rising process.
Preferably: in S2, the position of the gap and the hole is observed by covering the vertical pipe of the basement with a glass sheet.
Preferably: the clay fire clay, the low-temperature silicon fire clay and the high-alumina powder are in the following weight ratio: 60:30:10.
Preferably: the proportioning process of the pug is as follows: adding 40 percent or 60 percent of water according to the weight ratio of the pug, stirring uniformly, and standing for 2-3 hours.
Preferably: the specific gravity of the pug ranges from 1.32 to 1.34.
Preferably: the mud material is continuously reduced along with the rise of the mud material, an air inlet valve of the shotcrete machine is adjusted, and the pressure of compressed air is reduced, so that the mud material rises at a constant speed.
Preferably: and when the pug rises to the position above the gap and the hole, the pug stays for 2 to 3 minutes, then the pressure is gradually reduced to enable the pug to descend, and finally the residual pug is discharged from the lower part of the embedded pipe.
The invention has the advantages and the technical effects that:
the method utilizes a mud filling method to treat the blowby of the brick gas duct, can effectively fill the blowby part, enables the vertical flue to normally convey gas, completely meets the heating requirement of the furnace temperature, and improves the maintenance level of the coke oven. The method has the advantages that the effect of treating the blowby brick gas duct by adopting the mud filling method is very obvious, the flame combustion condition of the vertical flue is good, the temperature is greatly improved, and the yield and the quality of coke and gas are improved.
Detailed Description
In order to make the above objects, control systems and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The method aims at the serious condition of the blowby of the brick gas duct, and the blowby part is processed by adopting a mud filling method.
A 'mud filling method' for treating the blowby of a brick gas channel comprises the steps of firstly adding a special mud material which is prepared in advance into a vertical pipe of a basement, pressing the mud material through compressed air, enabling the mud material to rise slowly in the brick gas channel, and filling gaps and holes when the mud material passes through the blowby position.
When the coke oven gas is used for heating, the technology of treating the blowby of the brick gas channel by a mud filling method is adopted, so that the problem that the brick gas channel cannot be heated normally due to serious blowby is solved.
A method for treating blowby of a coke oven brick gas channel comprises the following steps:
1. and selecting the transverse exhaust pipe where the vertical flue is positioned to stop heating the coke oven gas.
2. And determining the size and height of the gap and the hole in the brick gas channel according to the temperature in the vertical flame channel, the flame combustion condition and the flame color. When necessary, the glass sheet is used for covering the vertical pipe of the basement to observe the positions of the gaps and the holes.
3. And (5) proportioning pug. The main refractory materials of the proportioned pug comprise clay fire clay, low-temperature silicon fire clay and high-alumina powder, and are prepared according to the proportion of about 60 by weight. Adding water accounting for about 40-60% of the weight of the pug, uniformly stirring, and standing for 2-3 hours for use.
The proportioned pug is used for treating the brick gas channel, so that the brick gas channel has the advantages of high temperature resistance, corrosion resistance, good cohesiveness and long hanging time. The hanging time is 2-3 times of the original pug.
4. The process of gunning the brick gas channel is carried out when the airflow descends. The vertical pipe plug is unscrewed to plug the small branch pipe, so that mud is prevented from being injected into the gas pipeline.
5. And (3) dredging the brick gas channel by using an iron drill, and then purging the brick gas channel by using compressed air. And adding proportioned pug into the vertical pipe according to the leakage condition of the brick gas duct, wherein the height of the pug is 400-600 mm.
6. The shotcrete machine is connected with compressed air, and the initial pressure of the compressed air is determined by the specific gravity, the height and the leakage height of the mud, which are shown in the table I.
TABLE 1 PRESSURE GAUGE FOR TREATING BRICK GAS DUCT BY MUD-INJECTION METHOD
Description of the drawings:
making first, the specific gravity of the selected matched mud is 1.32-1.34.
In order to prevent the pug from being thrown into the vertical flue to affect heating, the maximum rising height of the pug is 5m.
The pug is slowly lifted in the brick gas channel by compressed air, and the pug continuously fills gaps and holes in the brick gas channel in the lifting process. Along with the rise of the pug, the pug is continuously reduced, an air inlet valve of the shotcrete machine needs to be correspondingly adjusted, the pressure of compressed air is reduced, and the pug rises at a constant speed. The rising speed is well controlled, and the rising speed is not too large. When the pug rises to a position slightly higher than the gap and the hole, the pug stays for 2 to 3 minutes, then the pressure is gradually reduced, the pug slowly descends, and finally the residual pug is discharged from the lower part of the embedded pipe.
7. The operations of 5 and 6 are repeated according to specific conditions, so that gaps and holes in the brick gas channel can be completely filled.
8. After the treatment, dredging the brick gas channel, taking out the blockage in the small branch pipe, removing the residual mud, and recovering heating after normal operation.
The mud irrigation method can fill gaps smaller than 25mm and holes smaller than 30 mm.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for treating blowby of a coke oven brick gas channel is characterized by comprising the following steps:
s1, determining a transverse exhaust pipe where a leakage vertical flue is located, and stopping heating coke oven gas;
s2, determining the size and height of gaps and holes in the brick gas channel according to the temperature in the vertical flame channel, the flame combustion condition and the flame color;
s3, proportioning pug; the pug comprises clay fire clay, low-temperature silicon fire clay and high-alumina powder, and is added with 40 to 60 weight percent of water and stirred uniformly, and then placed for 2 to 3 hours;
s4, when the airflow descends, the brick gas channel is gunned;
s5, dredging the brick gas channel by using an iron drill, and then blowing the brick gas channel clean by using compressed air; according to the leakage condition of the brick gas duct, adding proportioned pug into the stand pipe, wherein the height of the pug is 400-600 mm;
s6, determining the initial pressure of compressed air according to the specific gravity, the height and the leakage height of the pug, connecting the compressed air by a shotcrete machine, enabling the pug to rise in the brick gas channel through the compressed air, and continuously filling gaps and holes in the brick gas channel during rising of the pug.
2. The coke oven brick gas channel blowby treatment method of claim 1, which is characterized in that: in S2, the basement vertical pipe is covered by a glass sheet to observe the positions of the gaps and the holes.
3. The coke oven brick gas channel blowby treatment method of claim 1, which is characterized in that: the clay fire clay, the low-temperature silicon fire clay and the high-alumina powder are in the following weight ratio: 60:30:10.
4. The coke oven brick gas channel blowby treatment method of claim 1, which is characterized in that: the proportioning process of the pug comprises the following steps: adding 40 percent or 60 percent of water according to the weight ratio of the pug, stirring uniformly, and standing for 2-3 hours.
5. The coke oven brick gas channel blowby treatment method of claim 1, which is characterized in that: the specific gravity of the pug ranges from 1.32 to 1.34.
6. The method for treating blowby of a coke oven brick gas duct of claim 1, which is characterized by comprising the following steps: the mud material is continuously reduced along with the rise of the mud material, an air inlet valve of the shotcrete machine is adjusted, and the pressure of compressed air is reduced, so that the mud material rises at a constant speed.
7. The method for treating blowby of a coke oven brick gas duct of claim 1, which is characterized by comprising the following steps: and when the pug rises to the position above the gap and the hole, the pug stays for 2 to 3 minutes, then the pressure is gradually reduced to enable the pug to descend, and finally the residual pug is discharged from the lower part of the embedded pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210905526.9A CN115197723B (en) | 2022-07-29 | 2022-07-29 | Coke oven brick coal gas flue channeling treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210905526.9A CN115197723B (en) | 2022-07-29 | 2022-07-29 | Coke oven brick coal gas flue channeling treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115197723A true CN115197723A (en) | 2022-10-18 |
| CN115197723B CN115197723B (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210905526.9A Active CN115197723B (en) | 2022-07-29 | 2022-07-29 | Coke oven brick coal gas flue channeling treatment method |
Country Status (1)
| Country | Link |
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| CN (1) | CN115197723B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101974339A (en) * | 2010-11-03 | 2011-02-16 | 芜湖新兴铸管有限责任公司 | Repairing method of coking chamber of coke oven by using silica bricks |
| CN102580872A (en) * | 2012-02-22 | 2012-07-18 | 果枫松 | Spraying and filling machine for pneumatic horizontal booster pump |
| CN107312556A (en) * | 2017-07-21 | 2017-11-03 | 中冶焦耐(大连)工程技术有限公司 | A kind of brick gas passage mud jacking encapsulating method |
| JP2018150424A (en) * | 2017-03-10 | 2018-09-27 | 新日鐵住金株式会社 | Method for hot rearrangement-repairing oven brick of coke oven |
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| CN209481554U (en) * | 2019-01-15 | 2019-10-11 | 新疆八一钢铁股份有限公司 | A kind of improved coke oven brick gas passage provisions for grouting |
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-
2022
- 2022-07-29 CN CN202210905526.9A patent/CN115197723B/en active Active
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| CN101974339A (en) * | 2010-11-03 | 2011-02-16 | 芜湖新兴铸管有限责任公司 | Repairing method of coking chamber of coke oven by using silica bricks |
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| CN111363563A (en) * | 2020-03-18 | 2020-07-03 | 中国五冶集团有限公司 | Grouting sealing system and method for coke oven gas lower spray pipe brick gas channel full slurry method |
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