Integrated semi-dry purifying method for sintering flue gas

A sintering flue gas, semi-dry technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc. Flue gas purification device and other problems, to achieve the effect of easy control and adjustment, small footprint, and reduced operating costs

Inactive Publication Date: 2014-08-20
鞍钢集团工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, domestic sintering flue gas desulfurization, denitration, dioxin removal, and heavy metal removal flue gas comprehensive treatment technologies are still in the exploratory stage. The existing technologies are all based on spray tower wet purification devices, and there is no sinterin

Method used

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  • Integrated semi-dry purifying method for sintering flue gas

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Embodiment 1

[0058] [Example 1] Applying a semi-dry sintering flue gas integrated purification method of the present invention to the B series 328m 2 Purification of sintering machine flue gas

[0059] In this embodiment, the B series 328m 2 The original rotary spray drying desulfurization system of the sintering machine is modified, and the oxidant generation and distribution device is connected to the flue gas pipeline in front of the rotary spray drying desulfurization tower 6. The modified device includes a rotary spray drying desulfurization tower 6 and a bag-type dust removal purification and discharge device connected through a flue gas delivery pipeline. The rotary spray drying desulfurization tower 6 is also connected to a lime slurry preparation and delivery device 10 and a process cooling water supply device 11. The flue gas input pipe in front of the rotary spray drying desulfurization tower 6 is additionally connected to the oxidant generating and distributing device.

[006...

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Abstract

The invention relates to an integrated semi-dry purifying method for sintering flue gas. The method is adopted to perform high-efficiency desulfuration, denitration, and dioxin and heavy metal removal on sintering flue gas, an oxidizing agent generating and distributing device is connected on a flue gas pipeline in front of an absorption reaction tower of a semi-dry desulfurization system, uniformly-sprayed oxidizing agents and NO in flue gas are fully reacted to oxidize NO in the flue gas into NO2, and then flue gas enters the absorption reaction tower to be reacted with absorbing agents to achieve the purposes of desulfuration, denitration and dioxin and heavy metal removal. Compared with the prior art, the method has the beneficial effects that firstly, the method is suitable for all the semi-dry sintering flue gas purifying systems and can achieve the purposes of desulfuration, denitration and dioxin and heavy metal removal of the sintering flue gas in an integrated manner; secondly, the structure is simple, the occupied area is small and the operation maintenance is convenient; thirdly, the spraying amount of the oxidizing agents, the reaction time and the removal efficiency are easy to control and adjust; fourthly the investment and the operating cost are reduced; fifthly, the method is suitable for new semi-dry desulfurization systems and the transformed systems of the existing desulfurization systems.

Description

technical field [0001] The invention relates to a sintering flue gas purification technology, in particular to an integrated semi-dry sintering flue gas purification method. Background technique [0002] After several years of hard work, the desulfurization technology of sintering flue gas in my country's iron and steel industry has gradually matured. In order to further control pollution and improve the environment, the national "Twelfth Five-Year Plan" clearly increased NOx as a binding indicator for emission reduction, and at the same time gradually carried out the treatment of dioxins and Purification treatment of heavy metals, so now some companies have begun to try to denitrify, remove dioxins, and remove heavy metals from sintering flue gas, or reserve locations for denitrification, dioxins, and heavy metals while desulfurizing sintering flue gas, so that Create favorable conditions for the implementation of comprehensive treatment of sintering flue gas in the future. ...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/75B01D53/60B01D53/70B01D53/64
Inventor 常治铁王丽英刘莉张庆文孙凤军周航杨大力李修梅边景威
Owner 鞍钢集团工程技术有限公司
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