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Gas modifying combustion-compensating device for converter evaporation cooling air flue

A technology for vaporizing and cooling flue and gas, which is applied in the manufacture of converters, combustible gas purification, combustible gas purification/transformation, etc. It can solve the problems of insufficient utilization of gas, difficulty in industrial utilization, and major environmental pressure, etc., and achieve recovery of residual energy , solve the effect of equipment thermal expansion and cold contraction, prolonging the service life

Inactive Publication Date: 2008-02-06
昆明阳光基业股份有限公司
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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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  • Gas modifying combustion-compensating device for converter evaporation cooling air flue
  • Gas modifying combustion-compensating device for converter evaporation cooling air flue
  • Gas modifying combustion-compensating device for converter evaporation cooling air flue

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Embodiment Construction

[0014] The present invention will be further described below by way of examples, but not limited to examples.

[0015] 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.

[0016] Converter technical parameters:

[0017] 1. Converter nominal volume: 50t;

[0018] 2. Average smelting cycle: 33min;

[0019] 3. Oxygen blowing time: 14-17 minutes;

[0020] 4. Maximum furnace gas volume: 35600m 3 / h(standard condition);

[0021] 5. The temperature of the furnace gas outlet entering the fume hood: blowing period: 1400 ℃ ~ 1650 ℃;

[0022] 6. Initial dust concentration: 80~150g / Nm 3 (standard condition);

[0023] 7. Dispersion of smoke and dust:

[0024] particle size / um

＜0.5

0.5-1

1-2

2-10

10-40

＞40

Combustion method / %

50

45

5

Unburned method / %

30

53

...

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Abstract

The present invention relates to the field of gas explosion-proof, dry dedusting, and remained energy recovering in a steel-making convertor, and consists of a steel-making convertor boiloff cooling flue, a high temperature rapid valve with a water cooling system, and a coal gas inflamer. The present invention is characterized in that the flue section I behind a movable smoke cover of the steel-making converter is arranged with a high temperature rapid valve with a water cooling system, and a coal gas inflamer is arranged behind the high temperature rapid valve. The high temperature rapid valve opens when oxygen is blown in the steel-making process, the high temperature smoke gas passes through successfully; the high temperature rapid valve closes when oxygen is not blown to prevent the outside air from entering into the boiloff cooling flue. The coal gas inflamer and the high temperature rapid valve cooperate to do quality adjusting on the smoke gas in the boiloff cooling flue, to ensure the high smoke gas continuous production in the boiloff cooling flue, and the heat expansion and cold shrinkage problem caused by the rapid cooling and rapid heating of the boiloff cooling flue caused by the intermitting production of the steel-making convertor can be solved, the service life of the flue can be prolonged, the recovery quantity of the vapor can be increased, the recovery quantity of the coal gas can be increased, and the gas explosion condition can be eliminated.

Description

Technical field: [0001] The invention relates to the fields of anti-explosion of flue gas of a steelmaking converter, dry dust removal and residual energy 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 not fully utilized due to the release. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/40C10K1/00
Inventor 耿加祥郑建州张自毅何明俊
Owner 昆明阳光基业股份有限公司
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