CN110793051A - Method for cleaning deposited ash in ascending flue of submerged arc furnace - Google Patents
Method for cleaning deposited ash in ascending flue of submerged arc furnace Download PDFInfo
- Publication number
- CN110793051A CN110793051A CN201911134399.1A CN201911134399A CN110793051A CN 110793051 A CN110793051 A CN 110793051A CN 201911134399 A CN201911134399 A CN 201911134399A CN 110793051 A CN110793051 A CN 110793051A
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- Prior art keywords
- inhibitor
- flue
- ash
- submerged arc
- arc furnace
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J7/00—Arrangement of devices for supplying chemicals to fire
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/06—Use of additives to fuels or fires for particular purposes for facilitating soot removal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
- F23J3/026—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the chimneys
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention relates to the technical field of metallurgy, in particular to a method for cleaning deposited ash in an ascending flue of a submerged arc furnace, which comprises the following steps: the method comprises the following steps: selecting materials: selecting the variety of the inhibitor according to the variety of the metallurgical raw materials, and placing the selected inhibitor into a corresponding material bin; step two: feeding: conveying the type inhibitor selected in the step one from the material bin into the flue through an automatic feeder; step three: separating accumulated ash: through the treatment in the second step, the setting of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, improve the melting point of the ash deposited and slagging on the flue and accelerate the formation of crystal nucleus, thereby effectively weakening the interaction force among slagging molecules, weakening the caking property of the inhibitor on the micro silicon powder, loosening the slag blocks, and leading the slag blocks to fall off or be blown away by smoke.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a method for cleaning deposited ash in an ascending flue of a submerged arc furnace.
Background
In the industrial silicon smelting production, a flue is an important channel for exhausting gas in a furnace and is one of main devices for ensuring normal and stable operation of the furnace, but because industrial silicon smelting micro silicon powder has high viscosity, is easy to deposit and adhere in the flue to cause unsmooth flue gas flow, blocked system smoke exhaust and deteriorated furnace condition, the heated area of a boiler is one millimeter thick, the heat conductivity coefficient is reduced by about 50 times, the energy consumption is serious, the service life of the boiler and refractory materials can be influenced, and a large amount of S, N oxide and smoke dust can be discharged, so that the demand for a method for cleaning the accumulated dust in the ascending flue of an ore-smelting furnace is increased day by day.
Most of methods for cleaning accumulated dust in flues inside electric heating furnaces in the current market are manual cleaning, the furnaces need not be stopped for cleaning the flues once every 10-15 days, and 4-8 hours are needed each time, so that the method has the advantages of high operation intensity, large labor waste, greatly reduced productivity of enterprises and serious influence on production of the enterprises, and the method for cleaning the accumulated dust in the ascending flues of the submerged arc furnaces is provided for solving the problems.
Disclosure of Invention
The invention aims to provide a method for cleaning deposited ash in an ascending flue of a submerged arc furnace, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for cleaning deposited ash in an ascending flue of a submerged arc furnace comprises the following steps:
the method comprises the following steps: selecting materials: selecting the variety of the inhibitor according to the variety of the metallurgical raw materials, and placing the selected inhibitor into a corresponding material bin;
step two: feeding: conveying the type inhibitor selected in the step one from the material bin into the flue through an automatic feeder;
step three: separating accumulated ash: through the treatment in the step two, the setting of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, the melting point of the ash deposited and slagging on the flue is improved, and the formation of crystal nucleus is accelerated, so that the interaction force among slagging molecules is effectively weakened, the cohesiveness of the slagging molecules to the micro silicon powder is weakened, the slag blocks are loosened, and the slag blocks fall off or are blown away by smoke.
Preferably, when the inhibitor is conveyed, compressed air with the pressure of more than 0.4kpa is adopted to assist in conveying the inhibitor to the inside of the flue.
Preferably, the submerged arc furnace is kept in a hot state after being used for a period of time before the inhibitor is added.
Preferably, after the inhibitor is added, the use power of the submerged arc furnace is increased, and under the condition of violent combustion, the chemical gas is fully contacted with the heating surface adhered with the soot, so that a better use effect is ensured.
Preferably, the inhibitor comprises lime, cyanide, FD8954 coking inhibitor, and the like.
Preferably, the material bin is arranged far away from a fire source, so that moisture and organic matters are avoided.
Preferably, the inhibitor is used in an amount of one to three thousandths of the raw material.
Compared with the prior art, the invention has the beneficial effects that:
the invention can reduce the discharge amount of dust, nitrogen compounds and sulfur dioxide in the atmosphere, effectively protect the environment, clear away scales and the like in the flue and ensure the use effect of the submerged arc furnace.
Detailed Description
Example 1: the invention provides a technical scheme that:
a method for cleaning deposited ash in an ascending flue of a submerged arc furnace comprises the following steps:
the method comprises the following steps: selecting materials: the method has the advantages that the variety of the inhibitor is selected according to the variety of the metallurgical raw materials, the selected inhibitor is placed in the corresponding material bin, and the arrangement can adopt a device capable of adjusting feeding, so that the method can be used for using different inhibitors for different reactants, the method can be suitable for different reactants, and the application range is improved;
step two: feeding: the type inhibitor selected in the first step is conveyed from the material bin into the flue through the automatic feeder, and the method has high automation degree, so that the operation of workers is more convenient and safer, the labor intensity is effectively reduced, and the labor input is reduced;
step three: separating accumulated ash: through the treatment in the second step, the arrangement of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, the melting point of the ash deposited and slagging on the flue is improved, and the formation of crystal nuclei is accelerated, so that the interaction force among slagging molecules is effectively weakened, the caking property of the inhibitor on the micro silicon powder is weakened, the slag blocks are loosened, and the slag blocks fall off or are blown away by smoke gas.
When the inhibitor is conveyed, the compressed air with the pressure of more than 2kpa is adopted to assist in conveying the inhibitor into the flue, the arrangement can increase the power for conveying the inhibitor, so that the inhibitor can be better input into the flue, the reaction strength is increased, old scales in the flue can be conveniently softened and dried and cracked, before the inhibitor is put into the flue, the submerged arc furnace is ensured to be in a thermal state after being used for a period of time, the arrangement can ensure that the submerged arc furnace is in a relatively stable high-temperature state, so that the inhibitor can exert a better effect in the flue, after the inhibitor is put into the flue, the service power of the submerged arc furnace is increased, chemical gas is fully contacted with a heating surface adhered with soot under the condition of violent combustion, the better use effect is ensured, the FD8954 coking inhibitor is adopted for selection, and the arrangement can better inhibit scales in the electrothermal furnace, Softening and drying crack clearing, ensuring a relatively clean state in a flue, effectively avoiding the cleaning of the flue, or reducing the frequency of cleaning the flue, thereby reducing the input of manpower, being more convenient to use, effectively improving the production profit, keeping away from a fire source by setting a material bin, avoiding moisture and organic matters, ensuring that an inhibitor can be better stored by setting the material bin, effectively ensuring the quality of the inhibitor and the cleaning effect, wherein the use amount of the inhibitor is three thousandth of the raw material, and the input of the inhibitor with a larger amount can aim at the fact that an inhibitor ore-smelting furnace is initially input, a large amount of drugs can increase the reaction force of the adhesion on the flue, effectively ensuring that low-temperature soot is loosened and easy to fall off, reducing the melting point of the high-temperature soot to whiten, crack and fall, wherein the powdery soot is sucked to a dust remover along with the flue gas by an induced draft fan to settle, The blocky or flaky smoke scale is discharged out of the furnace along with the furnace slag or deposited on the furnace bottom after falling off, and the smoke scale ash slowly separates from the scaling surface under the general condition.
Example 2: the invention provides a technical scheme that:
a method for cleaning deposited ash in an ascending flue of a submerged arc furnace comprises the following steps:
the method comprises the following steps: selecting materials: the method has the advantages that the variety of the inhibitor is selected according to the variety of the metallurgical raw materials, the selected inhibitor is placed in the corresponding material bin, and the arrangement can adopt a device capable of adjusting feeding, so that the method can be used for using different inhibitors for different reactants, the method can be suitable for different reactants, and the application range is improved;
step two: feeding: the type inhibitor selected in the first step is conveyed from the material bin into the flue through the automatic feeder, and the method has high automation degree, so that the operation of workers is more convenient and safer, the labor intensity is effectively reduced, and the labor input is reduced;
step three: separating accumulated ash: through the treatment in the second step, the arrangement of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, the melting point of the ash deposited and slagging on the flue is improved, and the formation of crystal nuclei is accelerated, so that the interaction force among slagging molecules is effectively weakened, the caking property of the inhibitor on the micro silicon powder is weakened, the slag blocks are loosened, and the slag blocks fall off or are blown away by smoke gas.
When the inhibitor is conveyed, the compressed air with the pressure of more than 1kpa is adopted to assist in conveying the inhibitor into the flue, the arrangement can keep the strength of conveying the inhibitor, so that the inhibitor can be better input into the flue, the reaction strength is kept, the new scale in the flue can be conveniently softened and dried and cracked, before the inhibitor is put into the flue, the submerged arc furnace is ensured to be in a thermal state after being used for a period of time, the arrangement can ensure that the submerged arc furnace is in a relatively stable high-temperature state, so that the inhibitor can play a better effect in the flue, after the inhibitor is put into the flue, the service power of the submerged arc furnace is increased, chemical gas is fully contacted with a heating surface adhered with soot under the condition of violent combustion, the better use effect is ensured, the FD8954 coking inhibitor is adopted for selection, and the arrangement can better inhibit the scale in the electrothermal furnace, Softening and desiccation are clear away, comparatively clean state in the flue has been guaranteed, thereby the effectual clearance of having avoided the flue, perhaps reduce the frequency to the flue clearance, thereby reduce the input of manpower, and it is more convenient to use, the effectual profit that improves production, the fire source is kept away from in the setting of material storehouse, avoid moist and organic matter, the better depositing of inhibitor can be guaranteed in this kind of setting, the quality of effectual assurance inhibitor, guarantee the effect of clearance, the use amount of inhibitor is the thousandth of raw materials, the input of this kind of small dose inhibitor, can be directed against the later stage and stably drop into the hot stove in inhibitor ore deposit, the medicine of small dose, can keep the reaction intensity to the adhesion on the flue, guarantee to carry out the clearance that lasts to the structure of adhesion on the flue.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (7)
1. A method for cleaning deposited ash in an ascending flue of a submerged arc furnace is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: selecting materials: selecting the variety of the inhibitor according to the variety of the metallurgical raw materials, and placing the selected inhibitor into a corresponding material bin;
step two: feeding: conveying the type inhibitor selected in the step one from the material bin into the flue through an automatic feeder;
step three: separating accumulated ash: through the treatment in the step two, the setting of the inhibitor can effectively carry out catalytic oxidation treatment on the slagging and the settled ash, the melting point of the ash deposited and slagging on the flue is improved, and the formation of crystal nucleus is accelerated, so that the interaction force among slagging molecules is effectively weakened, the cohesiveness of the slagging molecules to the micro silicon powder is weakened, the slag blocks are loosened, and the slag blocks fall off or are blown away by smoke.
2. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: when the inhibitor is conveyed, compressed air with the pressure of more than 0.4kpa is adopted to assist in conveying the inhibitor to the inside of the flue.
3. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: before the inhibitor is added, the submerged arc furnace is ensured to be in a thermal state after being used for a period of time.
4. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: after the inhibitor is added, the use power of the submerged arc furnace is increased, so that the chemical gas is fully contacted with the heating surface adhered with the soot under the condition of violent combustion, and a better use effect is ensured.
5. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: the inhibitor comprises lime, cyanide, FD8954 coking inhibitor and the like.
6. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: the material bin is far away from a fire source, so that moisture and organic matters are avoided.
7. The method for cleaning the ash deposition in the ascending flue of the submerged arc furnace as claimed in claim 1, wherein: the usage amount of the inhibitor is one thousandth to three thousandth of the raw materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134399.1A CN110793051A (en) | 2019-11-19 | 2019-11-19 | Method for cleaning deposited ash in ascending flue of submerged arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911134399.1A CN110793051A (en) | 2019-11-19 | 2019-11-19 | Method for cleaning deposited ash in ascending flue of submerged arc furnace |
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| CN110793051A true CN110793051A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911134399.1A Pending CN110793051A (en) | 2019-11-19 | 2019-11-19 | Method for cleaning deposited ash in ascending flue of submerged arc furnace |
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Citations (6)
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|---|---|---|---|---|
| EP1528318A1 (en) * | 2003-10-30 | 2005-05-04 | Ctp Environnement | Method of cleaning heat exchange surfaces in operating furnaces |
| CN102747236A (en) * | 2012-07-31 | 2012-10-24 | 大冶有色金属有限责任公司 | Method for treating coking of ascending flue of Ausmelt furnace |
| CN103232876A (en) * | 2013-05-27 | 2013-08-07 | 深圳市明灯科技有限公司 | Boiler coking inhibitor |
| CN205933981U (en) * | 2016-08-08 | 2017-02-08 | 赤峰富邦铜业有限责任公司 | Restrain device that metallurgy of copper smelting furnace produced coking |
| WO2018204331A1 (en) * | 2017-05-01 | 2018-11-08 | Fuel Tech, Inc. | Controlling slagging and/or fouling in furnaces burning biomass |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1528318A1 (en) * | 2003-10-30 | 2005-05-04 | Ctp Environnement | Method of cleaning heat exchange surfaces in operating furnaces |
| CN102747236A (en) * | 2012-07-31 | 2012-10-24 | 大冶有色金属有限责任公司 | Method for treating coking of ascending flue of Ausmelt furnace |
| CN103232876A (en) * | 2013-05-27 | 2013-08-07 | 深圳市明灯科技有限公司 | Boiler coking inhibitor |
| CN205933981U (en) * | 2016-08-08 | 2017-02-08 | 赤峰富邦铜业有限责任公司 | Restrain device that metallurgy of copper smelting furnace produced coking |
| WO2018204331A1 (en) * | 2017-05-01 | 2018-11-08 | Fuel Tech, Inc. | Controlling slagging and/or fouling in furnaces burning biomass |
| CN109114565A (en) * | 2018-07-23 | 2019-01-01 | 新中天环保股份有限公司 | A kind of solid sulphur in hazardous waste burn system consolidates chlorine treatment process |
Non-Patent Citations (2)
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| 张敏: "艾萨余热锅炉辐射区结渣分析与控制", 《工业锅炉》 * |
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Application publication date: 20200214 |