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Dedusting and deep purification apparatus with high efficiency and low energy consumption for flue gas in metallurgical slag treatment process

A technology of deep purification device and treatment process, which is applied in the field of purification and cooling system, high-efficiency and low-energy consumption dust removal and deep purification device for flue gas in metallurgical slag treatment process, and can solve the problems of low empty tower speed in the spraying section, poor reliability of system operation efficiency, Problems such as difficulty in uniformity of the cloth liquid in the tower can achieve the effect of improving the classification dust removal efficiency and gas dust removal and purification efficiency, high dust removal and purification efficiency, and speeding up dynamic and efficient mixing

Inactive Publication Date: 2017-05-31
SHANGHAI BAOSTEEL ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The empty tower speed in the spraying section is low, the tower diameter is large, the distribution 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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  • Dedusting and deep purification apparatus with high efficiency and low energy consumption for flue gas in metallurgical slag treatment process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The high-efficiency, low-energy-consumption dust removal and deep purification device for flue gas in the metallurgical slag treatment process includes a spray spray scrubber 1 and a downward gas-liquid foam suspension pneumatic swirl deep purification dehydration and demist tower 2. The upper outlet of the spray spray scrubber 1 and the downward flow Gas-liquid foam suspension, pneumatic swirl deep purification, dehydration and defogging tower 2, the upper entrance is connected through connecting flue 3;

[0045] The spray spray washing tower 1 is a wet multi-layer gas-liquid countercurrent contact method, and the downward gas-liquid foam suspension pneumatic swirl deep purification dehydration demisting tower 2 is a gas-liquid downstream contact method;

[0046] Above the smoke inlet pipe 4 in the spray spray washing tower 1, there are fog condensation and trapping area I, spray spray washing area II, and primary gas-liquid separation and aerosol preconditioner area II...

Embodiment 2

[0068] 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%. Select the high-efficiency, low-energy dust removal and deep purification device and system for flue gas in the metallurgical slag treatment process.

[0069] 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.

[0070] The relevant operating parameters of this embodiment are as follows

[0071] Flue gas volume 24×10 4 m 3 / h

[...

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Abstract

The invention relates to a dedusting and deep purification apparatus with high efficiency and low energy consumption for flue gas in a metallurgical slag treatment process. The apparatus comprises a tower for spraying, sprinkling and washing and a downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow; an outlet at the upper end of the tower for spraying, sprinkling and washing and an inlet at the upper end of the downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow are connected by a connection flue; a sidewall at the lower end of the tower for spraying, sprinkling and washing is provided with a flue gas inlet pipeline; a sidewall of the downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow is provided with a flue gas outlet pipeline; the tower for spraying, sprinkling and washing employs a wet type multilayer gas-liquid countercurrent contact mode, and the downstream type gas-liquid tower for deep purification, dehydration and demisting with foam suspension and pneumatic swirling flow employs a gas-liquid current contact mode. The dedusting and deep purification apparatus with high efficiency and low energy consumption for flue gas in the metallurgical slag treatment process is adapted to characteristics of high temperature, high moisture and high viscosity flue gas, and realizes ultra-low flue dust emission concentration in a low energy consumption condition, in order to satisfy more strict environmental protection emission requirements of pollution treatment.

Description

technical field [0001] The invention relates to a dust removal device for the prevention and control of air pollution, in particular to a high-efficiency, low-energy consumption dust removal and deep purification device for flue gas in the metallurgical slag treatment process, belongs to the technical field of flue gas dust removal, desulfurization and purification devices, and can also be used in a flue gas purification and cooling system. Background technique [0002] Dusty steam flow flue gas is the most polluting flue gas in the iron and steel metallurgy industry, and the processing and utilization of steel slag is a typical source of dusty steam flow flue gas. Due to the diversity of steelmaking equipment, process, slagging system, and steel slag physical and chemical properties in domestic steel slag resource treatment processes, slag treatment and utilization methods are diversified. However, during the slag treatment process, high-temperature slag produces a large amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D53/00
CPCB01D53/00B01D2257/30B01D50/40
Inventor 陈振华管序荣孔德明胡可庆
Owner SHANGHAI BAOSTEEL ENERGY TECH
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