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Wet type variable flow dedusting and wet type electrostatic deep purification system for metallurgical slag treatment flue gas

A wet electrostatic and deep purification technology, applied in chemical instruments and methods, dispersed particle separation, combined devices, etc., can solve problems such as poor reliability of system operation efficiency, low empty tower velocity in the spray section, and difficulty in uniform liquid distribution in the tower. , to achieve the effect of improving the efficiency of classified dust removal and gas dust removal and purification, high dust removal and purification efficiency, and speeding up dynamic and efficient mixing

Inactive Publication Date: 2017-05-31
江苏博际环境工程科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The empty tower velocity in the spray section is low, the tower diameter is large, the distribution of liquid in the tower is difficult to be uniform, and the reliability of the system operation efficiency is poor, etc.

Method used

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  • Wet type variable flow dedusting and wet type electrostatic deep purification system for metallurgical slag treatment flue gas
  • Wet type variable flow dedusting and wet type electrostatic deep purification system for metallurgical slag treatment flue gas
  • Wet type variable flow dedusting and wet type electrostatic deep purification system for metallurgical slag treatment flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Under the negative pressure suction of the fan, the dust-laden steam flow flue gas drawn from the slag treatment device, from the smoke inlet pipe and the horizontal plane at an angle of 14°, enters the spray spray washing tower obliquely, and firstly meets the washing liquid discharged from the spray Countercurrent contact washing and cooling.

[0045] The flue gas goes up for a certain distance, and a set of double-fluid spray guns or a set of fine liquid mist spray guns or a set of double-fluid spray guns are set on the appropriate section between the cross-section of the flue gas inlet and the venturi rod grid layer with non-equal cross-section. Combined with a fine liquid mist spray gun, the liquid mist group or absorbent mist group is evenly sprayed to the section, and the smoke is mixed with it, so that the area obtains a large number of mist groups or groups of droplets close to the size of finer dust particles. The droplet group of the absorbent forms a higher ...

Embodiment 2

[0063] The slag treatment comprehensive transformation project of a large iron and steel company adopts the drum method slag treatment process, and the dust-laden steam stream from the slag treatment device has a high moisture content: 13%-15%, and the dust carried is ultra-fine steel slag. Powder, with hydraulic and sticky (knot) properties. From the perspective of dust particle size distribution: volume percentage / %: particle size > 10 μm accounted for 56%, particle size 2--10 μm accounted for 32%, and the rest <2 μm accounted for 12%. Steel slag is used to treat dust-laden steam flow and flue gas wet spray spray dedusting device.

[0064] Wet spray dust removal equipment is installed before the induced draft fan, and the purified gas is discharged to the atmosphere through the fan and exhaust pipe.

[0065] The relevant operating parameters of this embodiment are as follows

[0066] Flue gas volume 15×10 4 m 3 / h

[0067] Inlet flue gas temperature 80~100℃

[0068] Th...

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Abstract

The invention relates to a wet type variable flow dedusting and wet type electrostatic deep purification system for metallurgical slag treatment flue gas. The system comprises a tower for spraying, sprinkling and washing, a downstream type gas-liquid dehydration tower with foam suspension and pneumatic swirling flow, and an upstream type wet type electrostatic deep purification device. An outlet at the upper end of the tower for spraying, sprinkling and washing is connected to an inlet at the upper end of the downstream type gas-liquid dehydration tower with foam suspension and pneumatic swirling flow by a mist increasing type connection flue; an outlet at the lower end of the downstream type gas-liquid dehydration tower with foam suspension and pneumatic swirling flow is connected to an inlet at the lower end of the upstream type wet type electrostatic deep purification device by a connection flue; the tower for spraying, sprinkling and washing employs a wet type multilayer gas-liquid countercurrent contact mode, and the downstream type gas-liquid dehydration tower with foam suspension and pneumatic swirling flow employs a gas-liquid current contact mode; a sidewall at the lower end of the tower for spraying, sprinkling and washing is provided with a flue gas inlet pipeline, and the upper end of the upstream type wet type electrostatic deep purification device is provided with an exhaust pipe. The system can be used for effectively improving removal rate of the purifier for fine particles, so that ultra low flue dust emission concentration in a low energy consumption condition is stably realized, and more strict environmental protection emission requirements of pollution treatment is satisfied.

Description

technical field [0001] The invention relates to a wet-type variable-flow dedusting and wet-type electrostatic deep purification system for metallurgical slag treatment flue gas, which is used for air pollution prevention and control, and belongs to the technical field of flue gas dust removal and desulfurization and gas purification. Background technique [0002] Dusty steam flow flue gas is a common pollution emission gas in chemical industry, building materials, iron and steel metallurgy and other industries, and steel slag treatment process is one of the typical sources of dusty steam flow flue gas. During the slag treatment process, the high-temperature slag will generate a large amount of superheated steam when it is rapidly quenched by water, and the diffusion of slag dust with the steam is inevitable. Its main components are metal oxide particles and water vapor, which pollute the regional environment. With the implementation of ≤air pollutant emission standards for ...

Claims

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Application Information

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IPC IPC(8): B01D50/00
CPCB01D50/40
Inventor 陈振华李楚管序荣孔德明
Owner 江苏博际环境工程科技有限公司
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