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Dry-method dust collection and surplus energy recovery device for steel-smelting converter flue gas

A steelmaking converter and dry dust removal technology, which is applied in the direction of manufacturing converters and improving process efficiency, can solve the problems of underutilization of gas, difficulty in industrialized utilization, and major environmental pressure, achieve reliable explosion-proof automatic control, and reduce the possibility of The effect of improving the efficiency of dust removal and dust removal

Inactive Publication Date: 2007-05-16
云南阳光基业能源管控技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only a part of the waste heat is recovered, and the unqualified gas is not fully utilized due to the release. The unqualified gas discharged and a large amount of sewage and sludge all cause significant environmental pressure
[0003] Since the high-temperature flue gas produced by the steelmaking converter is intermittent, it is difficult to use it industrially

Method used

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  • Dry-method dust collection and surplus energy recovery device for steel-smelting converter flue gas
  • Dry-method dust collection and surplus energy recovery device for steel-smelting converter flue gas
  • Dry-method dust collection and surplus energy recovery device for steel-smelting converter flue gas

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Embodiment Construction

[0031] Take the No. 6 steelmaking converter flue gas dry dust removal and residual energy recovery device of Kunming Steel No. 3 Steelmaking Plant as an example.

[0032] Converter technical parameters:

[0033] 1. Converter nominal volume: 50t

[0034] 2. Average smelting cycle: 33min

[0035] 3. Oxygen blowing time: 14~17min

[0036] 4. Maximum furnace gas volume: 35600m 3 / h (standard condition)

[0037] 5. The temperature of the furnace gas outlet entering the fume hood: combustion period: 1400 ℃ ~ 1650 ℃

[0038] Recovery period: 1200℃~1400℃

[0039] 6. Initial dust concentration: 80~150g / Nm 3 (standard condition)

[0040] 7. Dispersion of smoke and dust:

[0041] particle size / um

＜0.5

0.5~1

1~2

2~10

10~40

＞40

Combustion method / %

50

45

5

Unburned method / %

30

53

17

[0042]8. Main components of smoke a...

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Abstract

The invention discloses a recycling device of residual heat to dedust through drying method, which is composed of steel-smelting rotary furnace, high-temperature rapid valve, mobile petticoat pipe, combusting device, vaporization cooling flue, high-temperature cyclone duster, shell-and-tube exchanger, cloth duster (or electric duster), three-way switching valve, dedusting fan, gas thruster device and gas box, wherein the gas combusting supplementing device is set in the flue after mobile smoke bell; the high-temperature vortex deduster is set behind the evaporation cooling flue; the shell-and-tube exchanger is behind the high-temperature vortex deduster, which possesses cloth deduster.

Description

technical field [0001] The invention relates to the field of dust removal and waste energy recovery of steelmaking converter flue gas, in particular to a device for dry dust removal and waste heat recovery. Background technique [0002] At present, most of the flue gas treatment of steelmaking converters in the country adopts wet treatment process, which is called "OG method". The treatment process is: the converter flue gas passes through the cover skirt and the vaporization cooling flue to recover steam, and the temperature of the flue gas is reduced from 1400 to 1650 °C to 800 to 1000 °C, and then enters the first-stage venturi tube and the second-stage venturi tube for dust removal and cooling , through the induced draft fan and the three-way switching valve, the gas enters the recovery system, the qualified gas is recycled, and the unqualified gas enters the release tower for combustion and emission. Only part of the waste heat is recovered, and the unqualified gas is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/46C21C5/40
CPCY02P10/20
Inventor 刘连城耿加祥杨振立
Owner 云南阳光基业能源管控技术股份有限公司
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