CN103451356A - Coarse dust-removal device for dry dust removal for converter - Google Patents
Coarse dust-removal device for dry dust removal for converter Download PDFInfo
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- CN103451356A CN103451356A CN2013103767792A CN201310376779A CN103451356A CN 103451356 A CN103451356 A CN 103451356A CN 2013103767792 A CN2013103767792 A CN 2013103767792A CN 201310376779 A CN201310376779 A CN 201310376779A CN 103451356 A CN103451356 A CN 103451356A
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Abstract
The invention discloses a coarse dust-removal device for dry dust removal for a converter, which is designed for mainly aiming at high investment cost and operation cost of the current dry dust-removal device. The coarse dust-removal device for dry dust removal for the converter at least comprises an evaporative cooler connected with a converter smoke outlet. The evaporative cooler is connected with a vaporized cooling flue through a non-metallic compensator and is connected with a V-shaped pipeline, and the V-shaped pipeline is connected with a one-time dust removal pipeline. A nitrogen inputting pipeline is arranged on the one-time dust removal pipeline, and a coarse ash bin dust removal device is arranged under the V-shaped pipeline. The V-shaped pipeline is communicated with the coarse ash bin dust removal device. The coarse dust-removal device for dry dust removal for the converter has the advantages that a V-shaped bent pipe is not easily hardened, and the investment and operation cost is low.
Description
Technical field
The present invention relates to converter gas dry dedusting technology field, being specifically related to a kind of converter gas dry method dust is device.
Background technology
Dry dedusting technology is a kind of new dust collecting process of converter steelmaking in recent years, has the advantages such as environmental pollution is low, running cost is low, has obtained good application in many iron and steel enterprises at home and abroad.High-temperature flue gas (1400 ℃～1600 ℃) is cooling through each section of gasification cooling flue, and temperature is reduced to 850 ℃～1000 ℃.Flue gas is then by evaporative cooler (EC), and its water smoke formed by double-current atomizing lance directly is cooled to 250 ℃ of left and right, by cleaning shaft, high-voltage electrostatic dust separator, centrifugal blower, gas cooler to gas chamber or chimney, diffuses.
Evaporative cooler as one of nucleus equipment of dry-dedusting system, both had very strong cooling effect to flue gas, can reach to it effect of thick dedusting again, and the cinder dust quantity accounts for dry-dedusting system always except 40% of dust quantity.At present, the wet cooling tower that the dry-dedusting system in converter steelmaking workshop adopts-banana bend pipe (thick ash-transmission system) is processed a flue dust in converter mill.There is following shortcoming in this device:
(1) the banana bend pipe is prone to internal dust and hardens and cause the chain mat machine latch up phenomenon, excessive the burning out of chain mat machine motor load when serious;
(2) banana-bends tube body and chain conveyor, increased the one-time investment of equipment and long-term running cost;
(3) for working as electrostatic precipitator, CO, O appear in dust-removal system
2the limits of explosion content of content overproof lacks corresponding gas dilution system;
(4) the cinder storehouse unload the ash often occur the phenomenon that dust flies upward the post environment being had to pollution.
Summary of the invention
For the problems referred to above, the invention provides that a kind of dust is difficult for hardening, investment and the low converter gas dry method dust of operation cost be device.
For achieving the above object, the thick cleaning apparatus of converter dry dedusting of the present invention, at least comprise the evaporative cooler that the converter gas outlet connects, described evaporative cooler connects evaporative cooler by non-metal compensator, described evaporative cooler is connected with the V-arrangement pipeline, described V-arrangement pipeline is connected with the one-time dedusting pipeline, described one-time dedusting pipeline is provided with the nitrogen input channel, the below of described V-arrangement pipeline is provided with cinder storehouse cleaning apparatus, and described V-arrangement pipeline and described cinder storehouse cleaning apparatus are connected.
Further, the thick ash removal pipe of described V-arrangement consists of interconnective the first pipeline and second pipe, the angle α of described first and second pipeline, 45 °≤α≤75 °.
Further, described cinder storehouse cleaning apparatus comprises the middle ash silo that is arranged on described V-arrangement pipeline below and is arranged on the cinder storehouse that described middle ash silo below is connected with described middle ash silo, warehouse top, described cinder storehouse is connected with dedust air duct, and described dedust air duct is connected with dedusting fan.
Especially, described cinder storehouse is provided with hopper wall vibrator.
Further, described V-arrangement bend pipe is provided with inspection manhole.
Further, at least be provided with repid cut-off valve, relief valve on described nitrogen input channel.
The thick cleaning apparatus of converter dry dedusting of the present invention, being connected the banana bend pipe with the prior art evaporative cooler compares, the present invention connects the V-arrangement bend pipe by evaporative cooler and has replaced the banana-bends tubular construction, first, dust in the V-arrangement bend pipe can drop to voluntarily in the cinder storehouse cleaning apparatus be arranged on below the V-arrangement bend pipe under the effect of gravity and centrifugal force, not needing increases attached dust removal installation, has reduced the construction cost of device; The second, because the bottom of banana bend pipe is horizontal structure, the banana bend pipe easily stops up, and needs to drop into human cost after stopping up it is cleared up, and scale removal process can cause converter to stop production.
The thick cleaning apparatus of converter dry dedusting of the present invention, increased the nitrogen input channel, in early stage and the later stage of converter smelting, inputs respectively nitrogen, at initial smelting period, can effectively reduce the O in pipeline
2content, can effectively reduce CO in pipeline, O in the smelting later stage
2content, guarantee the safety of electrostatic precipitator (ESP).
The accompanying drawing explanation
Fig. 1 is the structural representation that converter gas dry method dust of the present invention is device.
Embodiment
Below in conjunction with Figure of description, the present invention will be further described.
The thick cleaning apparatus of converter dry dedusting of the present invention, at least comprise the evaporative cooler that the converter gas outlet connects, described evaporative cooler connects evaporative cooler by non-metal compensator, described evaporative cooler is connected with the V-arrangement pipeline, described V-arrangement pipeline is connected with the one-time dedusting pipeline, described one-time dedusting pipeline is provided with the nitrogen input channel, and the below of described V-arrangement pipeline is provided with cinder storehouse cleaning apparatus, and described V-arrangement pipeline and described cinder storehouse cleaning apparatus are connected.
Embodiment 1
The thick cleaning apparatus of this enforcement embodiment converter dry dedusting, at least comprise the evaporative cooler that the converter gas outlet connects, described evaporative cooler connects gasification cooling flue by non-metal compensator, described evaporative cooler is connected with the V-arrangement pipeline, described V-arrangement pipeline is connected with the one-time dedusting pipeline, described one-time dedusting pipeline is provided with the nitrogen input channel, at least be provided with repid cut-off valve, relief valve on described nitrogen input channel, the below of described V-arrangement pipeline is provided with cinder storehouse cleaning apparatus, and described V-arrangement pipeline and described cinder storehouse cleaning apparatus are connected.
The Converter Oxigen Blowing decarburization produces a large amount of flue gases, and temperature reaches 1400～1600 ℃, and after gasification cooling flue is cooling, flue-gas temperature reaches 850～1000 ℃.Non-metal compensator connects gasification cooling flue and evaporative cooler, is furnished with double-current atomizing lance, inspection manhole and relevant inspection platform on evaporative cooler, and it can be cooled to 250 ℃ of left and right by flue gas by water droplets, and smoke content reduces nearly 40%.Injection flow rate is accurately controlled according to flue gas heat, guarantees that jetted water can evaporate fully, thereby reaches cooling to flue gas, and confluent only accounts for 10% of conventional thick water for dust removal amount.Simultaneously, water droplets has the flue gas conditioning function, in cooled flue gas, can improve its dew point, changes dust specific resistance, improves the purification efficiency of electrostatic precipitator (ESP) to dust.
Evaporative cooler is divided into the V-type bend pipe structure, and the evaporative cooler exit gas temperature reaches 250 ℃ of left and right, and in flue gas, this V-type bend pipe structure of dust process, because the agency part of gravity and centrifugal force falls to cinder storehouse cleaning apparatus, carries out dedusting.
Establish the nitrogen input channel on one-time dedusting airduct after the V-type bend pipe structure.At converter smelting in earlier stage, slag making materials (as lime, fluorite etc.) enters slag making in converter molten pool, now the oxygen rifle is in the high rifle position of blowing, oxygen main with molten iron in [Si] generation oxidizing reaction, and react with [Fe], generate in slag (FeO), be conducive to generate the pre-slag that fusing point is lower.Simultaneously, before blowing, in 1～2min, oxygen is in O
2-[O] conversion stage, cause O in cleaning shaft
2content early stage (being mainly to add slag making in early stage, mass transfer stage) is higher, now opens the nitrogen dilution system, and low pressure nitrogen (～0.015MPa) is filled with in cleaning shaft, can effectively reduce the O in pipeline
2content, at the beginning of especially carbon period starts, venting of dust explosion very easily occurs.Now, the dry method dust station is placed in T-valve to diffuse position, burns and diffuses processing.In the blowing later stage, the decarburization task finishes substantially, fall the rifle oxygen blast still may occur CO content in flue gas higher than 9%, O
2content, higher than 6% situation, is opened nitrogen dilution system (part 16), and low pressure nitrogen (～0.015MPa) is filled with in cleaning shaft, effectively reduces CO, O in pipeline
2content, guarantee the safety of electrostatic precipitator (ESP).
Embodiment 2
As shown in Figure 1, the thick cleaning apparatus of this enforcement embodiment converter dry dedusting, at least comprise the flue gas cooling duct 2 that converter 1 exhanst gas outlet connects, described flue gas cooling duct 2 connects gasification cooling flue by non-metal compensator 3, described evaporative cooler is connected with the V-arrangement pipeline, described V-arrangement pipeline is connected with the one-time dedusting pipeline, described one-time dedusting pipeline is provided with the nitrogen input channel, at least be provided with repid cut-off valve on described nitrogen input channel, relief valve, the below of described V-arrangement pipeline is provided with cinder storehouse cleaning apparatus, and described V-arrangement pipeline and described cinder storehouse cleaning apparatus are connected.
Converter 1 oxygen decarburization produces a large amount of flue gases, and temperature reaches 1400～1600 ℃, and after gasification cooling flue 2 is cooling, flue-gas temperature reaches 850～1000 ℃.Non-metal compensator 3 connects gasification cooling flue 2 and evaporative cooler 4, be furnished with double-current atomizing lance 5, inspection manhole 6 and relevant inspection platform on evaporative cooler, it can be cooled to 250 ℃ of left and right by flue gas by water droplets, and smoke content reduces nearly 40%.Injection flow rate is accurately controlled according to flue gas heat, guarantees that jetted water can evaporate fully, thereby reaches cooling to flue gas, and confluent only accounts for 10% of conventional thick water for dust removal amount.Simultaneously, water droplets has the flue gas conditioning function, in cooled flue gas, can improve its dew point, changes dust specific resistance, improves the purification efficiency of electrostatic precipitator (ESP) to dust.
Evaporative cooler is divided into the V-type bend pipe structure, and high-temperature flue gas is cooling by evaporative cooler (EC), and under the effect of gravity and centrifugal force, through the sedimentation of V-type bend pipe structure, removes 40% of total amount of dust in flue gas.This structure is provided with inspection manhole, and form of flanges is conducive to clear up the flue dust blockage problem in the V-type bend pipe structure, conveniently it is cleared up normally.The evaporative cooler exit gas temperature reaches 250 ℃ of left and right, in flue gas, this V-type bend pipe structure of dust process is because the agency part of gravity and centrifugal force falls to cinder storehouse cleaning apparatus, described cinder storehouse cleaning apparatus comprises the middle ash silo that is arranged on described V-arrangement pipeline below and is arranged on the cinder storehouse that described middle ash silo below is connected with described middle ash silo, top, described cinder storehouse is connected with dedust air duct, and the air intake vent of described dedust air duct is connected with blower fan.Establish hopper wall vibrator 13 on cinder storehouse 12, can realize unloading ash to dump truck 14 and not there will be the phenomenon hardened.Cinder storehouse dedust air duct 11 is established on top, cinder storehouse, by dedusting fan 10, has reduced the post airborne dust, realizes the production environment of hommization.
Establish nitrogen input channel 16 on one-time dedusting airduct 15 after V-type bend pipe structure 7.At converter 1 initial smelting period, slag making materials (as lime, fluorite etc.) enters slag making in converter molten pool, now the oxygen rifle is in the high rifle position of blowing, oxygen main with molten iron in [Si] generation oxidizing reaction, and react with [Fe], generate in slag (FeO), be conducive to generate the pre-slag that fusing point is lower.Simultaneously, before blowing, in 1～2min, oxygen is in O
2-[O] conversion stage, cause O in cleaning shaft
2content early stage (being mainly to add slag making in early stage, mass transfer stage) is higher, now opens nitrogen input channel 16, and low pressure nitrogen (～0.015MPa) is filled with in cleaning shaft, can effectively reduce the O in pipeline
2content, at the beginning of especially carbon period starts, venting of dust explosion very easily occurs.Now, the dry method dust station is placed in T-valve to diffuse position, burns and diffuses processing.In the blowing later stage, the decarburization task finishes substantially, fall the rifle oxygen blast still may occur CO content in flue gas higher than 9%, O
2content, higher than 6% situation, is opened nitrogen input channel 16, and low pressure nitrogen (～0.015MPa) is filled with in cleaning shaft, effectively reduces CO, O in pipeline
2content, guarantee the safety of electrostatic precipitator (ESP).
In conventional dry-method dust-removal device, due to the banana bend pipe being set below evaporative cooler, also relevant device should be set simultaneously.Below investment cost and the bright cost of investment contrast of this law of existing dry-method dust-removal device:
Conventional dry method dust: be provided with curved rubber hose, double chain mat machine and corresponding service kit and platform below evaporative cooler, the disposable apparatus investment cost is as follows:
A. curved rubber hose :～20 ten thousand/cover;
B. double chain mat machine :～23 ten thousand/cover;
C. service kit :～5 ten thousand/cover;
D. steel structure platform :～2 ten thousand/cover.Amount to :～50 ten thousand/cover.
E. 1.2.1 equipment long-time running cost
F. the running cost of double chain mat machine is mainly considered in equipment long-time running pricing, double chain mat machine
Power: the 5kW/ platform, by the annual production of 1 120t converter, calculate, whole year operation need increase by ten thousand yuan/year of 5 * (1440/36) * 300 * 0.55=3.3.
G. the 1.2.2 personnel increase cost
H. conventional dry method dust need increase in this zone 1 of the staff who is responsible for cleaning, by 1 class of calculating in 8 hours, needs to increase by 3 staff, and the yearly wage volume considers by～4 ten thousand yuan/people, and annual normal operation needs～12 ten thousand yuan/year.
I. the production loss that the cleaning of 1.2.3 curved rubber hose causes
J. conventional dry-dedusting system is by annual 3 unexpected obstructions, and each recovery needs 60min, annual loss: ten thousand yuan/year of (60 * 3/36) * 120 * 0.97 * 3000=174.6.
K. in sum, this invention is considered from long-time running cost angle, saves 189.9 ten thousand yuan/year.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (6)
1. the thick cleaning apparatus of converter dry dedusting, at least comprise the evaporative cooler that the converter gas outlet connects, described evaporative cooler connects gasification cooling flue by non-metal compensator, it is characterized in that: described evaporative cooler is connected with the V-arrangement pipeline, described V-arrangement pipeline is connected with the one-time dedusting pipeline, described one-time dedusting pipeline is provided with the nitrogen input channel, the below of described V-arrangement pipeline is provided with cinder storehouse cleaning apparatus, and described V-arrangement pipeline and described cinder storehouse cleaning apparatus are connected.
2. the thick cleaning apparatus of converter dry dedusting according to claim 1, it is characterized in that: the thick ash removal pipe of described V-arrangement consists of interconnective the first pipeline and second pipe, the angle α of described first and second pipeline, 45 °≤α≤75 °.
3. the thick cleaning apparatus of converter dry dedusting according to claim 1, it is characterized in that: described cinder storehouse cleaning apparatus comprises the middle ash silo that is arranged on described V-arrangement pipeline below and is arranged on the cinder storehouse that described middle ash silo below is connected with described middle ash silo, top, described cinder storehouse is connected with dedust air duct, and described dedust air duct is connected with dedusting fan.
4. the thick cleaning apparatus of converter dry dedusting according to claim 3, it is characterized in that: described cinder storehouse is provided with hopper wall vibrator.
5. the thick cleaning apparatus of converter dry dedusting according to claim 1, it is characterized in that: described V-arrangement bend pipe is provided with inspection manhole.
6. the thick cleaning apparatus of converter dry dedusting according to claim 1, is characterized in that: on described nitrogen input channel, at least be provided with repid cut-off valve, relief valve.
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| CN2013103767792A CN103451356A (en) | 2013-08-26 | 2013-08-26 | Coarse dust-removal device for dry dust removal for converter |
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| CN2013103767792A CN103451356A (en) | 2013-08-26 | 2013-08-26 | Coarse dust-removal device for dry dust removal for converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301182A (en) * | 2020-12-07 | 2021-02-02 | 北京立化科技有限公司 | U-shaped separation section and converter gas dry type dust removal and waste heat recovery system |
| CN112359699A (en) * | 2020-10-27 | 2021-02-12 | 江西省赣江交通设施有限公司 | Continuous high-brightness durable highway marking construction method |
| CN115491460A (en) * | 2022-10-17 | 2022-12-20 | 江苏中碳节能技术有限公司 | Converter flue gas treatment system and treatment method |
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| CN203440393U (en) * | 2013-08-26 | 2014-02-19 | 中冶华天工程技术有限公司 | Rough dedusting device for converter dry dedusting |
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2013
- 2013-08-26 CN CN2013103767792A patent/CN103451356A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04202617A (en) * | 1990-11-30 | 1992-07-23 | Kawasaki Steel Corp | Rh type degassing device |
| KR20030039254A (en) * | 2001-11-12 | 2003-05-17 | 주식회사 포스코 | Method and apparatus for optimum control of operation of induced draft fan in molten metal purifying process utilizing furnace with oxygen lance |
| JP2004323868A (en) * | 2003-04-21 | 2004-11-18 | Nippon Steel Corp | Facility for treating waste gas of metallurgical furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359699A (en) * | 2020-10-27 | 2021-02-12 | 江西省赣江交通设施有限公司 | Continuous high-brightness durable highway marking construction method |
| CN112301182A (en) * | 2020-12-07 | 2021-02-02 | 北京立化科技有限公司 | U-shaped separation section and converter gas dry type dust removal and waste heat recovery system |
| CN115491460A (en) * | 2022-10-17 | 2022-12-20 | 江苏中碳节能技术有限公司 | Converter flue gas treatment system and treatment method |
| CN115491460B (en) * | 2022-10-17 | 2024-06-07 | 江苏华和能科技术有限公司 | Converter flue gas treatment system and treatment method |
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Application publication date: 20131218 |