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Processes and devices for treating furnace gases

A technology of treatment furnace and process, which is used in waste gas treatment, gas treatment, waste heat treatment, etc.

Active Publication Date: 2021-03-19
DANIELI CORUS BV (NL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem encountered with injecting such reagents in the form of powdered reagents is that the powdered reagents should be evenly distributed on the passing air stream

Method used

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  • Processes and devices for treating furnace gases

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Experimental program
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Effect test

Embodiment Construction

[0026] figure 1 There is shown an apparatus 1 for treating a blast furnace gas stream by spraying a dry powder reagent 2 containing an adsorbent material such as activated carbon and an alkaline reagent such as lime. The device 1 comprises a gas flow channel 3 defining a blast furnace gas flow path with a flow direction A. As shown in FIG. Said channel 3 has a channel wall 4, generally a cylindrical channel wall. The injector 6 is arranged centrally in the gas flow channel 3 . To illustrate injector 6, the figure 1 The central part wall 4 is destroyed. The injector 6 is provided with a ring of radially oriented outlets 8 . A first hollow cone portion 10 of the injector 6 extends from the portion with the radial outlet 8 and is directed downstream. The second hollow cone portion 12 of the injector 6 extends in the opposite direction from the portion with the radial outlet 8 and points upstream. The cone portions 10 , 12 direct the blast furnace gas flow to minimize turbul...

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Abstract

A process and a device for treating a furnace gas flow flowing through a channel (3) having a pressure greater than 1 bar. A powdered reagent (2), for example a powder comprising an alkaline reagent (e.g. lime) and / or an adsorbent (e.g. activated carbon), is sprayed under overpressure into the Furnace airflow. The powdered reagents may be fluidized. The pressure for spraying the powder can be adjusted by controlling the amount of fluidizing gas discharged via the exhaust outlet (24).

Description

technical field [0001] The present invention relates to a process for treating furnace gases emitted from steel or iron production processes, such as blast furnace gases or gases produced with electric arc furnaces (EAF), basic oxygen furnaces (BOF) or direct reduced iron (DRI) processes and devices. Background technique [0002] Blast furnace gas, which typically has a relatively high carbon monoxide content, eg about 20-28%, can be used as fuel gas in various types of burners. However, the dust content of the blast furnace gas leaving the blast furnace is too high for stable operation of the burners, so the dust content of the blast furnace gas must be significantly reduced. This is usually done through a two-step process. In the first step, larger dust particles are separated in a cyclone. In the second step, smaller particles are usually separated by a scrubber in a wet process. This wet process requires significant water consumption and produces sludge and wastewate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/40B01D53/44B01D53/83C10K1/20
CPCB01D53/10B01D53/40B01D53/44C10J3/00C10K1/20C21B7/002B01D2251/404B01D2253/102B01D2257/2045B01D2257/2047B01D2257/304B01D2257/7027B01D2258/025C10K1/024C10K1/32C21C5/40C21B2100/44F27B1/10F27B3/10F27D17/008B01D53/83Y02P10/25B01D53/12B01D2257/60B01D2259/128C21C2100/02
Inventor W·B·埃瓦尔茨P·D·克鲁特
Owner DANIELI CORUS BV (NL)