Process and system for desulfurizing fume by two-stage liquid column spray

A desulfurization system and flue gas technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of large changes in flue gas volume, poor adaptability to flue gas load regulation, and difficulty in flue gas adaptation. Small footprint, compact structure, obvious effect

Inactive Publication Date: 2003-05-14
TSINGHUA UNIV
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Problems solved by technology

However, since this technology adopts a single-stage liquid column injection system and has poor adaptability to flue gas load adjustment, its desulfurization efficiency is only 70-90%, which is not suitable for flue gas with large flue gas volume and high sulfur content. It is difficult to adapt to the purification of

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  • Process and system for desulfurizing fume by two-stage liquid column spray
  • Process and system for desulfurizing fume by two-stage liquid column spray
  • Process and system for desulfurizing fume by two-stage liquid column spray

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Embodiment approach

[0015] The system is mainly composed of a flue gas delivery system, a desulfurizer slurry supply system, a reaction tower, an industrial water supply and demister system, and a gypsum treatment system. The flue gas delivery system includes a flue 1, a flue gas valve 2 and a blower 4; The desulfurizing agent slurry supply system is composed of a lye pool 6, a slurry pump 7 and a circulating pump. The reaction tower includes a desulfurization reaction zone and a desulfurization by-product oxidation reaction zone, which includes a water pipe, a mist eliminator 17, a flue gas inlet, Flue gas outlet, liquid column injection system 18 and blast system 8, etc., liquid column injection system 18 is composed of upper and lower two-stage desulfurizer slurry injection devices and two slurry circulation pumps 15 and 19 arranged in the desulfurization reaction zone . Simultaneously, this system has also installed a pH adjustment device 22 additionally at the outlet of the slurry delivery p...

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Abstract

A two-stage liquid column spray system for desulfurizing the fume is composed of upper and lower stage sprayers for desulfurizing agent in the form of slurry and two slurry circulating pumps. The pH value in each reaction region can be regulated according to actual load. It features that the time for reaction between SO2 and desulfurizing agent can be effectively elongated and the SO2 is always in optimal desulfurizing environment. Its advantages are high desulfurizing efficiency up to 98% or more, wide regulation range of liquid / gas ratio and high utilization rate of desulfurizing agent.

Description

technical field [0001] The invention belongs to the technical field of flue gas wet desulfurization, and in particular relates to a method and system for removing sulfur dioxide in flue gas discharged from pulverized coal boilers, bed-fired boilers or other combustion equipment. Background technique [0002] Sulfur dioxide pollution has always been the focus of environmental protection in many countries around the world. At present, in the prior art, although many studies have been carried out on flue gas desulfurization in coal-fired industrial boilers and power plant boilers, more than 90% of them use wet flue gas desulfurization, of which limestone-gypsum flue gas desulfurization Technology-based, its high desulfurization efficiency is a more effective method for flue gas desulfurization, while other desulfurization methods have low desulfurization efficiency and are difficult to meet increasingly stringent environmental protection requirements. [0003] The traditional ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D53/79B01D53/80
Inventor 项光明姚强李定凯佟会玲廖洪强郑跃红徐纪青陈昌和徐旭常李彦祁海鹰由长福
Owner TSINGHUA UNIV
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