Steel slag flue gas treatment method and system

A treatment system and treatment method technology, which is applied in the treatment method and system field of steel slag flue gas, can solve the problems of steel slag dust exceeding the standard and failure to meet the national ultra-low emission standard, and achieve good dust removal effect and low cost.

Pending Publication Date: 2020-01-17
SHAANXI LONGMEN IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for processing steel slag flue gas to solve the problem that the steel slag dust exceeds the standard and cannot reach the national ultra-low emission standard

Method used

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  • Steel slag flue gas treatment method and system
  • Steel slag flue gas treatment method and system
  • Steel slag flue gas treatment method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1 spray tower 1 1

[0044] Cylinder diameter: D5000

[0045] Cylinder height: ~18m

[0046] Main material: Q235 steel

[0047] Number of spray guns: 10

[0048] Water supply: 1240t / h

[0049] Water supply pressure: 0.4~0.6MPa

[0050] 2 dehydrator 2 1 set

[0051] Cylinder diameter: D5000

[0052] Cylinder height: ~15m

[0053] Main material: Q235 steel

[0054] 3 induced draft fan

[0055] Form: centrifugal fan

[0056] Air volume: 100000m 3 / h

[0057] Wind pressure: 3000Pa

[0058] Speed: 960r / min

[0059] Equipped with variable frequency motor power: 220kW, rated voltage: 380V

[0060] Covered area: about 300m 2 .

[0061] 4 wet absorption tower 3

[0062] Table 1 Parameters of outlet flue gas treated by spray tower + dehydrator

[0063]

[0064] Table 2 Flue gas parameters after treatment by spray tower + dehydrator + wet absorption tower

[0065]

[0066] After the test, as shown in Table 2, the dust content of ...

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Abstract

The invention discloses a steel slag flue gas treatment method and system. The method comprises the following steps of: conveying high-temperature liquid steel slag generated by steelmaking into a hotbraising pool; spraying water into the hot braising pool to cool and pulverize the high-temperature liquid steel slag to obtain dust-containing steam; conveying the dust-containing steam to a spray tower through a pipe network, spraying the dust-containing steam in the spray tower to obtain dust-containing flue gas, dehydrating the dust-containing flue gas through a dehydrator to obtain dry fluegas, conveying the dry flue gas to a wet absorption tower through an induced draft fan, and discharging the dry flue gas into the atmosphere after dedusting and whitening the dry flue gas through thewet absorption tower; the high-temperature liquid steel slag is sequentially treated to obtain the dust-containing steam, the dust-containing steam, the dust-containing flue gas and the dry flue gas;finally, the dry flue gas is filtered into the atmosphere through the wet absorption tower, the ultra-low national standard is achieved, namely, the dust concentration is smaller than 10 mg / m < 3 >, the requirement for deep purifying of steel slag waste gas is met, the dust removal effect is good, the cost is low, and safety, environmental protection and no pollution are achieved.

Description

【Technical field】 [0001] The invention belongs to the field of steel slag dust removal, and in particular relates to a method and system for processing steel slag flue gas. 【Background technique】 [0002] The purpose of steel slag treatment is to complete the cooling, pulverization and magnetic separation of high-temperature liquid steel slag produced in the converter or electric furnace during the steelmaking process. The cooling process of steel slag treatment is accompanied by the generation of a large amount of smoke and dust. How to control the smoke and dust is an important issue for domestic iron and steel enterprises. At present, the mainstream processes for steel slag treatment in domestic iron and steel enterprises include: hot pouring method, hot simmering pool method, rolling hot simmering method, drum method, and wind quenching method. A large amount of smoke is produced, that is, a large amount of water vapor and other gases, accompanied by dust inclusions. ...

Claims

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Application Information

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IPC IPC(8): B01D47/06B01D53/26
CPCB01D47/06B01D53/26B01D2258/0283B01D2257/80
Inventor 刘安民刘会圈晏灏孙浪波高军锋樊君
Owner SHAANXI LONGMEN IRON & STEEL
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