CN203440392U - Dry dedusting system of converter - Google Patents

Dry dedusting system of converter Download PDF

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Publication number
CN203440392U
CN203440392U CN201320524114.7U CN201320524114U CN203440392U CN 203440392 U CN203440392 U CN 203440392U CN 201320524114 U CN201320524114 U CN 201320524114U CN 203440392 U CN203440392 U CN 203440392U
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China
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water
flue
cooled flue
dedusting
gas
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CN201320524114.7U
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Chinese (zh)
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崔荣峰
陈林权
武峰
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Huatian Engineering and Technology Corp MCC
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Huatian Engineering and Technology Corp MCC
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    • 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
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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Abstract

The utility model discloses a dry dedusting system of a converter. The dry dedusting system of the converter is low in investment and operating cost and high in stability. The dry dedusting system of the converter at least comprises a fine dedusting mechanism comprising a bag-type dust collector, the bag-type dust collector is connected with a first water-cooling flue and a second water-cooling flue, the first water-cooling flue is connected with a primary dedusting pipe, the second water-cooling flue is connected with a flue gas recovery mechanism, the first and second water-cooling flues are connected through the bag-type dust collector and a bypass pipe, a three-way valve and a temperature detector are arranged on a connecting pipe of the first water-cooling flue and the bag-type dust collector, and a dedusting fan is arranged on a connecting pipe of the second water-cooling flue and the bag-type dust collector. The dry dedusting system is high in safety performance and low in investment and operating cost.

Description

Converter dry dust-removal system
Technical field
The utility model relates to converter dry dedusting technology field, a kind of converter dry dust-removal system of specific design.
Background technology
Converter dry dedusting technology is a kind of novel one-time dedusting technique of converter steelmaking in recent years, has the advantages such as environmental pollution is low, running cost is low, has obtained good application at home and abroad in many iron and steel enterprises.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 being formed by double-current atomizing lance is directly cooled to 250 ℃ of left and right, by cleaning shaft, high-voltage electrostatic dust separator, centrifugal blower, gas cooler to gas chamber or diffusing chimney, diffuses.
At present, the static investment of dry-dedusting system body equipment is larger, is generally 2～4 times of OG dust-removal system of same scale.The evaporative cooler of dry-dedusting system highly has requirement for height across factory building to making steel, and has also increased to a certain extent the construction investment of factory building.Because dry-dedusting system is used electrostatic precipitator, at CO(9%) and O 2(6%) concentration reaches under certain condition and is easy to occur venting of dust explosion, on making steel normal production, has certain impact.In addition, evaporative cooler-banana bend pipe that one time, converter steelmaking workshop dry dedusting technology adopts (thick ash-transmission system)-cinder storehouse technique is processed coarse particles flue dust, cause equipment investment cost higher, and it is prone to internal dust and hardens and cause chain mat machine latch up phenomenon, excessive the burning out of chain mat machine motor load when serious, adopts steep-taper ash silo can cancel banana bend pipe and utility appliance.
Utility model content
For the problems referred to above, the utility model provides a kind of investment, operation cost low, and the good converter dry dust-removal system of safety performance.
For achieving the above object, the utility model converter dry dust-removal system, comprises thick dedusting mechanism, smart dedusting mechanism and off-gas recovery mechanism, wherein
Described thick dedusting mechanism, comprises the one-time dedusting pipeline that the gasification cooling flue of described converter gas delivery port connection, the evaporative cooler of described gasification cooling stack connection, described refrigerating unit connect;
Described smart dedusting mechanism, comprise sack cleaner, two gas ports of described sack cleaner connect respectively the first water-cooled flue and the second water-cooled flue, described the first water-cooled flue is connected with described one-time dedusting pipeline, described the second water-cooled flue is connected with described off-gas recovery mechanism, internal layout has atomizing lance, wherein said the first water-cooled flue is connected by sack cleaner and bypass duct with described the second water-cooled flue, the connecting tube of described the first water-cooled flue and described sack cleaner is provided with T-valve and temperature monitor, described bypass duct is connected with described T-valve, the connecting tube of described the second water-cooled flue and described sack cleaner is provided with dedusting fan.
Especially, described evaporative cooler comprises the cooling tower being connected with described gasification cooling stack by non-metal compensator and the cinder storehouse that is connected to described cooling tower below, and described cinder storehouse is taper warehouse structure.
Further, described off-gas recovery mechanism comprises diffusing chimney, gas chamber, be arranged on gas detecting instrument, T-valve on described the second water-cooled flue and described off-gas recovery mechanism connecting tube, described connecting tube is provided with T-valve, and the second cold water flue, diffusing chimney and described gas chamber are connected with described T-valve.
Further, the connecting tube of described the first water-cooled flue and described one-time dedusting pipeline is provided with pipeline explosion venting valve.
The utility model converter dry dust-removal system, flue gas is being carried out to the smart dedusting stage, adopt sack cleaner to replace electrostatic precipitator of the prior art, significantly reduced the one-time investment of equipment, operation maintenance cost, sack cleaner is compared to electrostatic precipitator stable performance simultaneously, safe, effectively avoided the potential safety hazard of dry-dedusting system venting of dust explosion, simultaneously in order not meet sack cleaner, the requirement of flue-gas temperature is provided with to water-cooled flue and temperature monitor has guaranteed to enter the requirement that flue-gas temperature in sack cleaner meets sack cleaner, avoided because flue-gas temperature is too high, sack cleaner being damaged.The utility model is applicable newly-built workshop processing set-up not only, and also the reforming technology of applicable existing steelshop is arranged, has good application prospect.In the utility model, the improvement of described smart dedusting mechanism is also applicable to the improvement ，Wei converter steelmaking factory upgrading in converter steelmaking workshop that good thinking is provided.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model converter dry dust-removal system.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
The utility model converter dry dust-removal system, comprises thick dedusting mechanism, smart dedusting mechanism and off-gas recovery mechanism, wherein
Described thick dedusting mechanism, comprises the one-time dedusting pipeline that the gasification cooling stack of described converter gas delivery port connection, the evaporative cooler of described gasification cooling stack connection, described refrigerating unit connect;
Described smart dedusting mechanism, comprise sack cleaner, two gas ports of described sack cleaner connect respectively the first water-cooled flue and the second water-cooled flue, described the first water-cooled flue is connected with described one-time dedusting pipeline, described the second water-cooled flue is connected with described off-gas recovery mechanism, wherein said the first water-cooled flue is connected by bypass duct with described the second water-cooled flue, the connecting tube of described the first water-cooled flue and described sack cleaner is provided with T-valve and temperature monitor, described bypass duct is connected with a valve port in described T-valve, the connecting tube of described the second water-cooled flue and described sack cleaner is provided with dedusting fan.
Embodiment 1
As shown in Figure 1, the present embodiment converter dry dust-removal system, comprises thick dedusting mechanism, smart dedusting mechanism and off-gas recovery mechanism, wherein
Described thick dedusting mechanism, comprises the one-time dedusting pipeline that the gasification cooling stack of described converter gas delivery port connection, the evaporative cooler of described gasification cooling stack connection, described refrigerating unit connect;
Described smart dedusting mechanism, comprise sack cleaner, two gas ports of described sack cleaner connect respectively the first water-cooled flue and the second water-cooled flue, described the first water-cooled flue is connected with a described cleaning shaft, described the second water-cooled flue is connected with described off-gas recovery mechanism, wherein said the first water-cooled flue is connected by bypass duct with described the second water-cooled flue, the connecting tube of described the first water-cooled flue and described sack cleaner is provided with T-valve and temperature monitor, described bypass duct is connected with a valve port in described T-valve, the connecting tube of described the second water-cooled flue and described sack cleaner is provided with dedusting fan.
Described off-gas recovery mechanism comprises diffusing chimney, gas chamber, be arranged on gas detecting instrument, T-valve on described the second water-cooled flue and described off-gas recovery mechanism connecting tube, and the second cold water flue, diffusing chimney and described gas chamber are connected with described T-valve.
In the present embodiment, described evaporative cooler comprises the wet cooling tower being connected with described gasification cooling stack by non-metal compensator and is connected to the cinder storehouse of described cooling tower below, described cinder storehouse is warehouse pyramidal structure, compare with the cinder chamber structure of banana-bends tubular construction of the prior art, the present embodiment reduces the static investment of the auxiliary facility of evaporative cooler, has well solved existing cinder e Foerderanlage and has easily occurred the problem of stopping up, hardening.
During oxygen top and bottom combined blown converter 1 blowing, produce a large amount of high-temperature flue gas (1400 ℃～1600 ℃), through gasification cooling flue 2 each section cooling, temperature is reduced to 850 ℃～1000 ℃.Then flue gas passes through non-metal compensator 3 and evaporative cooler 4, and its water droplets being formed by double-current atomizing lance is directly cooled to 250 ℃ of left and right.Injection flow rate can accurately be controlled according to flue gas calorific value, guarantees that jetted water can evaporate completely, thereby reaches cooling to flue gas, and confluent only accounts for 10% of conventional thick water for dust removal amount.Thick dedusting is unloaded ash to dump truck 6 behind steep-taper cinder storehouse 5, slightly except dust quantity, accounts for 40% left and right of total fume amount.
Under dedusting fan 13 suction functions, bessemerize the flue dust of generation through one-time dedusting pipeline 7, pipeline explosion venting valve 8 to first water-cooled flues 9, the first water-cooled flue is accurately controlled by the calorific value of flue gas equally, and cycle of higher pressure water is further reduced to 160 ℃～200 ℃ by the temperature of flue gas.Through water-cooled flue cooling, and pass through sack cleaner 12 through temperature monitor 10 detected temperatures flue gas up to standard; Temperature flue gas not up to standard switches to bypass duct by high temperature resistant three valve 11, but because dustiness in a flue gas is now higher, so flue gas can only diffuse processing by diffusing chimney 16.
Flue gas after sack cleaner is processed is further lowered the temperature by the second water-cooled flue (inside is provided with atomizing lance), flue-gas temperature is reduced to below 70 ℃, at CO, O2 one detector 15, analyze smoke components CO(>=35%) and O2(≤1.5%) while meeting recovering condition simultaneously, three-way switch valve 16 switches to converter gas cabinet 18 recyclings, do not meet recovery and require to switch to diffusing chimney 17, employing combustion method is carried out safety, processing is diffused in environmental protection.
Embodiment 2
The present embodiment converter dry dust-removal system, comprises thick dedusting mechanism, smart dedusting mechanism and off-gas recovery mechanism, wherein
Described thick dedusting mechanism, comprises evaporative cooler, one-time dedusting pipeline that the gasification cooling flue of described converter gas delivery port connection, described gasification cooling flue connect;
Described smart dedusting mechanism, comprise sack cleaner, two gas ports of described sack cleaner connect respectively the first water-cooled flue and the second water-cooled flue, described the first water-cooled flue is connected with described one-time dedusting pipeline, described the second water-cooled flue is connected with described off-gas recovery mechanism, wherein said the first water-cooled flue is connected by sack cleaner and bypass duct with described the second water-cooled flue, the connecting tube of described the first water-cooled flue and described sack cleaner is provided with T-valve and temperature monitor, described bypass duct is connected with a valve port in described T-valve, the connecting tube of described the second water-cooled flue and described sack cleaner is provided with dedusting fan.
During the blowing of oxygen top and bottom combined blown converter, produce a large amount of high-temperature flue gas (1400 ℃～1600 ℃), cooling through each section of gasification cooling flue, temperature is reduced to 850 ℃～1000 ℃.Then flue gas passes through evaporation-cooled device, and its water droplets being formed by double-current atomizing lance is directly cooled to 250 ℃ of left and right.Injection flow rate can accurately be controlled according to flue gas calorific value, guarantees that jetted water can evaporate completely, thereby reaches cooling to flue gas, and confluent only accounts for 10% of conventional thick water for dust removal amount.After thick dedusting, unload ash to dump truck, slightly except dust quantity, account for 40% left and right of total fume amount.
Under dedusting fan suction function, bessemerize the flue dust of generation through one-time dedusting pipeline, pipeline explosion venting valve to the first water-cooled flue, the first water-cooled flue is accurately controlled by the calorific value of flue gas equally, and cycle of higher pressure water is further reduced to 160 ℃～200 ℃ by the temperature of flue gas.Through water-cooled flue cooling, and pass through sack cleaner through temperature monitor detected temperatures flue gas up to standard; Temperature flue gas not up to standard switches to bypass duct by high temperature resistant three valve, and the flue gas of smart dedusting mechanism output is done last flue gas through off-gas recovery mechanism and processed.
In the various embodiments described above, flue gas is being carried out to the smart dedusting stage, adopt sack cleaner to replace electrostatic precipitator of the prior art, significantly reduced the one-time investment of equipment, operation maintenance cost, sack cleaner is compared to electrostatic precipitator stable performance simultaneously, safe, effectively avoided the potential safety hazard of dry-dedusting system venting of dust explosion, simultaneously in order not meet sack cleaner, the requirement of flue-gas temperature is provided with to water-cooled flue and temperature monitor has guaranteed to enter the requirement that flue-gas temperature in sack cleaner meets sack cleaner, avoided because flue-gas temperature is too high, sack cleaner being damaged.The utility model is applicable newly-built workshop processing set-up not only, and also the reforming technology of applicable existing steelshop is arranged, has good application prospect.In the utility model, the improvement of described smart dedusting mechanism is also applicable to the improvement ，Wei converter steelmaking factory upgrading of the existing primary dedusting system of converter steelmaking that good thinking is provided.
The cost of investment of system of the present utility model and prior art and the comparison of operation cost:
A cost of investment: the dry-dedusting system that adopts electrostatic precipitator: a complete set of equipment and three electricity investments for example need 2,200 ten thousand yuan/cover, and adopt this utility model to adopt " water-cooled flue+sack cleaner " structure, only need～8,000,000 yuan/overlap.
Operation cost: adopt the dry-dedusting system of electrostatic precipitator and the key distinction of employing " converter dry dust-removal system described in the utility model " to be:
(1) this utility model adopts sack cleaner;
(2) this utility model water-cooled flue is further lowered the temperature to flue-gas temperature;
A. the former maximum power load :～807kW(does not contain evaporative cooler, double chain mat machine, aerofoil fan etc. in workshop), average power load: 240kW;
B. maximum the power load :～300kW(of this utility model is not containing evaporative cooler, double chain mat machine, aerofoil fan etc. in workshop), average power load: 120kW;
By the annual production of 1 120t converter, calculate, this utility model whole year operation need reduce ten thousand yuan/year of 120 * (1440/36) * 300 * 0.55=79.2.
2.2.2 the production loss that static venting of dust explosion causes
The dry-dedusting system that adopts electrostatic precipitator is by annual venting of dust explosion 6 times, recovers to need 30min, annual loss: ten thousand yuan/year of (30 * 6/36) * 120 * 0.97 * 3000=174.6 at every turn.
In sum, this utility model is considered from long-time running cost angle, is saved 253.8 ten thousand yuan/year.
Above; it is only preferred embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.

Claims (4)

1. a converter dry dust-removal system, comprises thick dedusting mechanism, smart dedusting mechanism, one-time dedusting pipeline and off-gas recovery mechanism, it is characterized in that: wherein
Described thick dedusting mechanism, comprises the one-time dedusting pipeline that the gasification cooling stack of described converter gas delivery port connection, the evaporative cooler of described gasification cooling stack connection, described refrigerating unit connect;
Described smart dedusting mechanism, comprise sack cleaner, entering of described sack cleaner, outlet connects respectively the first water-cooled flue and the second water-cooled flue, described the first water-cooled flue is connected with described one-time dedusting pipeline, described the second water-cooled flue is connected with described off-gas recovery mechanism, internal layout has atomizing lance, wherein said the first water-cooled flue is connected by sack cleaner and bypass duct with described the second water-cooled flue, the connecting tube of described the first water-cooled flue and described sack cleaner is provided with T-valve and temperature monitor, described bypass duct is connected with a valve port in described T-valve, the connecting tube of described the second water-cooled flue and described sack cleaner is provided with dedusting fan.
2. converter dry dust-removal system according to claim 1, it is characterized in that: described evaporative cooler comprises the cooling tower being connected with described gasification cooling stack by non-metal compensator and the cinder storehouse that is connected to described cooling tower below, and described cinder storehouse is taper warehouse structure.
3. converter dry dust-removal system according to claim 1, it is characterized in that: described off-gas recovery mechanism comprise diffusing chimney, gas chamber and be arranged on described the second water-cooled flue and described off-gas recovery mechanism connecting tube on gas detecting instrument, wherein said connecting tube is provided with T-valve, and the second cold water flue, diffusing chimney and described gas chamber are connected with described T-valve respectively.
4. converter dry dust-removal system according to claim 1, is characterized in that: the connecting tube of described the first water-cooled flue and described one-time dedusting pipeline is provided with pipeline explosion venting valve.
CN201320524114.7U 2013-08-26 2013-08-26 Dry dedusting system of converter Withdrawn - After Issue CN203440392U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388047A (en) * 2013-08-26 2013-11-13 中冶华天工程技术有限公司 Converter dry-process dedusting system and technology
CN109136457A (en) * 2018-09-30 2019-01-04 四川德胜集团钒钛有限公司 A kind of converter gas recovery system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388047A (en) * 2013-08-26 2013-11-13 中冶华天工程技术有限公司 Converter dry-process dedusting system and technology
CN103388047B (en) * 2013-08-26 2015-08-12 中冶华天工程技术有限公司 Converter dry dust-removal system and technique
CN109136457A (en) * 2018-09-30 2019-01-04 四川德胜集团钒钛有限公司 A kind of converter gas recovery system and method

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Granted publication date: 20140219

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