A device and method for comprehensive flue gas treatment
A comprehensive treatment and flue gas technology, applied in the direction of chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of sticking fly ash, equipment corrosion, etc., to avoid the increase of nitrogen oxide emissions, reduce the amount of addition, The effect of avoiding equipment corrosion
Active Publication Date: 2016-02-24
BAOSHAN IRON & STEEL CO LTD +1
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Problems solved by technology
Liquid ammonium bisulfate is a highly viscous substance, which will adhere to fly ash in the flue gas and deposit on the surface of the equipment, causing corrosion of the equipment
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[0048] The present invention will be further described below with reference to the embodiments, and those skilled in the art should understand that the embodiments are only used for illustration and do not constitute any limitation to the present invention.
[0049] as attached figure 1 As shown, the present invention mainly includes inhibitor preparation tank 2, inhibitor quantitative conveying system 3, high temperature flue gas collection pipe 6, high temperature flue gas conveying and distribution system 5, adsorbent storage tank 10, adsorbent quantitative feeding system 9, The adsorbent reuse conveying system 8 is composed. The specific implementation is as follows:
[0050] 1. In order to facilitate the actual operation of the factory, the inhibitor preparation tank 2 is placed before the sintering raw material cylindrical mixer 4.
[0051] Commercially available solid urea is configured as a 30-50% solution in the preparation tank for standby;
[0052] 2. The prepare...
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The invention provides a device and a method for comprehensively treating smoke. The method sequentially comprises the following three stages: (1) a source inhibition stage:adding an inhibiting agent in a sintering raw material, after uniformly mixing, and sintering on a sintering machine bed; (2) a process control state: collecting sintering waste gas at the temperature of 200-400 DEG C from tail waste gas of the sintering machine in the step (1), conveying to the sintering machine bed through a waste gas circulating conveying system, and participating in sintering and decomposition; and (3) a flow-carrying absorbing stage; sending an adsorbing agent into a sintering main flue, after adsorbing tetrachlorodibenzo-p-dioxin in remained smoke in the step (2) by utilizing the flow-carrying absorbing principle, entering an electric dust collecting device with a smoke flow for performing gas-solid separation, and returning an adsorbing agent for adsorbing the tetrachlorodibenzo-p-dioxin into a sintering mixture for re-participating in sintering and decomposition. The method is formed by coupling different technologies in three stages, and is a low-cost tetrachlorodibenzo-p-dioxin emission-reducing control technology which fully utilizes the characteristic of a sintering process and extremely low in damage to sintering equipment.
Description
technical field [0001] The invention belongs to the field of sintering flue gas treatment in metallurgical industry, and particularly relates to a device and method for comprehensive treatment of flue gas. Background technique [0002] Dioxins, as persistent organic pollutants, are not only highly toxic, but also carcinogenic and teratogenic, and have genetic effects. On October 19, 2010, the Ministry of Environmental Protection, the Ministry of Foreign Affairs, the National Development and Reform Commission and other 9 ministries jointly issued the "Guiding Opinions on Strengthening the Prevention and Control of Dioxin Pollution", requiring focus on iron ore sintering and electric arc furnace steelmaking , Recycled non-ferrous metal production, waste incineration and other key industries to prevent and control dioxin pollution, clearly proposed to comprehensively implement measures to reduce and control dioxin in key industries such as iron ore sintering, and conduct in-dep...
Claims
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IPC IPC(8): B01D53/70B01D53/78B01D53/06C22B1/16
Inventor 俞勇梅李咸伟李正福陈君明何晓蕾俞光巩磊
Owner BAOSHAN IRON & STEEL CO LTD