CN109868337A - A method of preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion - Google Patents
A method of preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion Download PDFInfo
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- CN109868337A CN109868337A CN201910323297.8A CN201910323297A CN109868337A CN 109868337 A CN109868337 A CN 109868337A CN 201910323297 A CN201910323297 A CN 201910323297A CN 109868337 A CN109868337 A CN 109868337A
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Abstract
The present invention discloses a kind of method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion, include the following steps: to carry out lower rifle for the first time, in the first lower rifle stage, the oxygen flow of oxygen rifle is set as the 50% of normal blowing oxygen quantity, and it is kept for 50-70 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 10-15%/10 second, carry out secondary lower rifle, in secondary lower rifle stage (C >=0.20% in steel), the oxygen flow of oxygen rifle is set as the 50% of normal blowing oxygen quantity, and it is kept for 50-70 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 5-10%/10 second, it carries out blowing benefit operation, at the stage of re-blowing (C < 0.20% in steel), the oxygen flow of oxygen rifle is set as the 50% of normal blowing oxygen quantity.This prevents the method for once dust collection of converter Wet-electric duster ontology venting of dust explosion, it is controlled by the oxygen flow control and the penetrating of nitrogen of oxygen rifle, to effectively avoid the venting of dust explosion of converter gas wet electric precipitation, plays stable converter producing rhythm, it eliminates safe hidden trouble, reduces the damage to cleaner.
Description
Technical field
The present invention relates to the wet technical field of once dust collection of converter, specially one kind prevents once dust collection of converter wet electric dust-removing
The method of device ontology venting of dust explosion.
Background technique
There are two main classes for converter gas purification and coal-gas recovering method in converter steelmaking process, and it is net that one is wet processes (OG method)
Change recovery process, one is dry method (LT method) cleaning and recovering process, and due to history and investment, country's coal gas of converter is net at present
Change mostly uses greatly " wet process " technique, in recent years, with the increasingly raising of steel industry atmosphere pollutants emission standards, original turn
Primary " wet process " dust pelletizing system of furnace must be transformed the requirement for being just able to satisfy new standard, if using " dry method " technique instead, not only throw
Money height and the height limitation by original converter workshop, transformation difficulty is larger and uneconomical, and " wet process OG " dust pelletizing system changes
That makes current domestic maturation has " double tower " method and " wet electric dust-removing method " two methods, and section is all compared in the investment of both methods
It saves, but influences production during the transformation of " double tower " method is also limited and is transformed by existing factory building height, and " wet electric dust-removing method "
Influence of the transformation to production is smaller (can first to build wet electrical dust precipitator under the premise of not influencing production, then utilize converter
Maintenance interval and original system switch), and the advantages of electric precipitator possesses high dust collection efficiency, low energy consumption, therefore " electricity of wet process removes
Dirt method " transformation has broad application prospects.
Converter generates the flue gas containing fuel gas when smelting, and flue gas is collected by movable gas hood and received, through Vaporizing cooling
Flue is tentatively cooled to 900 DEG C or so, and into the cooling of OG system, rough dedusting, subsequent flue gas, which enters in wet electrical dust precipitator, to be carried out
Refined dedusting, exiting flue gas dust content is average≤10mg/Nm3, purified gas through gas fan be delivered to diffusing chimney or
Into gas recovery system.
But the normal work of electric precipitator has strict requirements to the ingredient of coal gas of converter, if CO > 9% and O2 >
6%, coal gas of converter may generate venting of dust explosion under the action of electric field corona current, contain a large amount of CO in coal gas of converter, due to
Converter smelting characteristic, air and coal gas of converter especially in first lower rifle, secondary lower rifle and are re-blow alternately through electric precipitator ontology
Stage is easy to appear the venting of dust explosion crosspoint of CO, O2, causes venting of dust explosion, and venting of dust explosion not only influences the normal smelting of converter, is also easy to cause
The deformation of electric precipitator even damages, and brings serious economic loss and security risk to enterprise.
The patent of existing application number CN201520552664.9 discloses a kind of device for preventing converter electric precipitation detonation discharge.
Although the invention solves the problems, such as, but still remaining the problems such as following when in use needs to solve:
Although the patent also uses is blown into nitrogen to reduce the concentration of CO and O2, but its there is no the speed that constraint is blown into
The parameters such as degree, content and duration, and and there is no the process for stepping up oxygen blast content, be easy to appear due to being added suddenly
Testing agency's detection difficult caused by high-content gas, is relatively difficult to control in operation.
Then, the applicant adheres to that the relevant industries are abundant for many years designs and develops and the experience of actual fabrication, for existing
Some structures and missing are studied improvement, provide a kind of side for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion
Method, to achieve the purpose that with more more practical value.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides one kind to prevent once dust collection of converter Wet-electric duster ontology from letting out
Quick-fried method solves in coal gas of converter containing a large amount of CO, due to converter smelting characteristic, air and coal gas of converter alternately through
Electric precipitator ontology is easy to appear the venting of dust explosion crosspoint of CO, O2, causes especially in first lower rifle, secondary lower rifle and stage of re-blowing
Venting of dust explosion, venting of dust explosion not only influence the normal smelting of converter, are also easy to the problem of causing the deformation of electric precipitator even to damage.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: one kind prevents once dust collection of converter wet
The method of method electric precipitator ontology venting of dust explosion, includes the following steps:
S1, lower rifle for the first time is carried out, in the first lower rifle stage, the oxygen flow of oxygen rifle is set as the 50% of normal blowing oxygen quantity, and
It is kept for 50-70 seconds, is then gradually improved oxygen flow to normal blowing oxygen quantity with the speed of 10-15%/10 second.
S2, secondary lower rifle is carried out, in secondary lower rifle stage (C >=0.20% in steel), the oxygen flow of oxygen rifle is set as normal
The 50% of blowing oxygen quantity, and kept for 50-70 seconds, then gradually oxygen flow is improved to normal oxygen blast with the speed of 5-10%/10 second
Amount.
S3, it carries out blowing benefit operation, at the stage of re-blowing (C < 0.20% in steel), the oxygen flow of oxygen rifle is set as normal oxygen blast
The 50% of amount, and kept for 20-40 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 15-20%/10 second.
Preferably, in step sl, the total time-consuming of step S1 is within 100 seconds.
Preferably, in step s 2, the total time-consuming of step S2 is within 130 seconds.
Preferably, in step s3, the total time-consuming of step S3 is within 70 seconds.
Preferably, in step S1, step S2 and step S3, in real time by oxygen concentration in flue gas and carbonomonoxide concentration with
Setting value is compared, and is chosen whether to need the gas piping before Wet-electric duster to spray into nitrogen, is worked as carbonomonoxide concentration
Higher than 12% and when oxygen concentration is higher than 6%, then nitrogen is sprayed into the gas piping before Wet-electric duster, when carbon monoxide is dense
Degree does not then spray into nitrogen to the gas piping before Wet-electric duster lower than 12% or when oxygen concentration is lower than 6%.
(3) beneficial effect
The present invention provides a kind of methods for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion.Having following has
Beneficial effect:
This prevents the method for once dust collection of converter Wet-electric duster ontology venting of dust explosion, passes through the oxygen flow control of oxygen rifle and nitrogen
The penetrating of gas controls, to effectively avoid the venting of dust explosion of converter gas wet electric precipitation, plays stable converter producing rhythm, eliminates peace
Full hidden danger reduces the damage to cleaner.
Specific embodiment
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
A method of once dust collection of converter Wet-electric duster ontology venting of dust explosion is prevented, is included the following steps:
S1, lower rifle for the first time is carried out, in the first lower rifle stage, the oxygen flow of oxygen rifle is set as the 50% of normal blowing oxygen quantity, and
It is kept for 50-70 seconds, is then gradually improved oxygen flow to normal blowing oxygen quantity (total consumption of this step with the speed of 10-15%/10 second
When within 100 seconds).
S2, secondary lower rifle is carried out, in secondary lower rifle stage (C >=0.20% in steel), the oxygen flow of oxygen rifle is set as normal
The 50% of blowing oxygen quantity, and kept for 50-70 seconds, then gradually oxygen flow is improved to normal oxygen blast with the speed of 5-10%/10 second
It measures (total time-consuming of this step is within 130 seconds).
S3, it carries out blowing benefit operation, at the stage of re-blowing (C < 0.20% in steel), the oxygen flow of oxygen rifle is set as normal oxygen blast
The 50% of amount, and kept for 20-40 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 15-20%/10 second
(total time-consuming of this step is within 70 seconds).
In above-mentioned all steps, oxygen concentration in flue gas and carbonomonoxide concentration are compared with setting value in real time,
Choose whether to need the gas piping before Wet-electric duster to spray into nitrogen, when carbonomonoxide concentration is higher than 12% and oxygen is dense
When degree is higher than 6%, then nitrogen is sprayed into the gas piping before Wet-electric duster, when carbonomonoxide concentration is lower than 12% or oxygen
When concentration is lower than 6%, then nitrogen is not sprayed into the gas piping before Wet-electric duster.
In conclusion the method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion, passes through the oxygen stream of oxygen rifle
Amount control and the penetrating of nitrogen control, to effectively avoid the venting of dust explosion of converter gas wet electric precipitation, play stable converter producing
Rhythm eliminates safe hidden trouble, and reduces the damage to cleaner.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion, which comprises the steps of:
S1, lower rifle for the first time is carried out, in the first lower rifle stage, the oxygen flow of oxygen rifle is set as the 50% of normal blowing oxygen quantity, and keeps
50-70 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 10-15%/10 second；
S2, secondary lower rifle is carried out, in secondary lower rifle stage (C >=0.20% in steel), the oxygen flow of oxygen rifle is set as normal oxygen blast
The 50% of amount, and kept for 50-70 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 5-10%/10 second；
S3, it carries out blowing benefit operation, at the stage of re-blowing (C < 0.20% in steel), the oxygen flow of oxygen rifle is set as normal blowing oxygen quantity
50%, and kept for 20-40 seconds, then gradually oxygen flow is improved to normal blowing oxygen quantity with the speed of 15-20%/10 second.
2. a kind of method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion according to claim 1, special
Sign is: in step sl, the total time-consuming of step S1 is within 100 seconds.
3. a kind of method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion according to claim 1, special
Sign is: in step s 2, the total time-consuming of step S2 is within 130 seconds.
4. a kind of method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion according to claim 1, special
Sign is: in step s3, the total time-consuming of step S3 is within 70 seconds.
5. a kind of method for preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion according to claim 1, special
Sign is: in step S1, step S2 and step S3, in real time by oxygen concentration in flue gas and carbonomonoxide concentration and setting value into
Row compares, and chooses whether to need the gas piping before Wet-electric duster to spray into nitrogen, when carbonomonoxide concentration is higher than 12%
And oxygen concentration be higher than 6% when, then to before Wet-electric duster gas piping spray into nitrogen, when carbonomonoxide concentration is lower than
12% or oxygen concentration be lower than 6% when, then not to before Wet-electric duster gas piping spray into nitrogen.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863078A (en) * | 2019-11-12 | 2020-03-06 | 攀钢集团攀枝花钢钒有限公司 | Method for recovering coal gas of vanadium extraction converter |
| CN115404301A (en) * | 2022-09-09 | 2022-11-29 | 山东莱钢永锋钢铁有限公司 | Method for preventing converter dry dedusting system from explosion venting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863078A (en) * | 2019-11-12 | 2020-03-06 | 攀钢集团攀枝花钢钒有限公司 | Method for recovering coal gas of vanadium extraction converter |
| CN115404301A (en) * | 2022-09-09 | 2022-11-29 | 山东莱钢永锋钢铁有限公司 | Method for preventing converter dry dedusting system from explosion venting |
| CN115404301B (en) * | 2022-09-09 | 2024-02-27 | 山东莱钢永锋钢铁有限公司 | Method for preventing explosion venting of converter dry dedusting system |
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