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Method of advanced oxidation for NO in flue gas and device thereof

An advanced oxidation and flue gas technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of no relevant research on exhaust gas, no patent application for NO oxidation by Fenton method, etc. The effect of easy retrofit, low investment and operating costs

Active Publication Date: 2012-09-19
浙江菲达环保科技股份有限公司
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Problems solved by technology

[0007] Although the strong oxidizing properties of Fenton's reagent are widely used in water treatment, there is no relevant research on the application of waste gas, especially in flue gas, and there is no application for related patents on the oxidation of NO by Fenton's method

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  • Method of advanced oxidation for NO in flue gas and device thereof
  • Method of advanced oxidation for NO in flue gas and device thereof

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Embodiment Construction

[0022] refer to figure 1 , a method for advanced oxidation of NO in flue gas, the flue gas after dedusting enters the vapor phase advanced oxidation device 1, and includes the following steps in turn: A. flue gas preconditioning: adopting process water spraying device 21 to directly spray process water Reverse spraying on the high-temperature flue gas, the humidity of the flue gas increases to 30%-70%, and the temperature drops to 90-110°C. This step completes the cooling, humidification and conditioning of the flue gas, creating a suitable reaction for the advanced oxidation of NO Environment; B. Vapor Phase Advanced Oxidation: The ferrous salt solution sprayed by the ferrous salt spraying device 31 and the hydrogen peroxide solution sprayed by the hydrogen peroxide spraying device 32 form the gaseous Fenton's reagent, generating a large amount of free radicals with extremely strong oxidation performance OH and HO 2 etc. It can oxidize insoluble NO in the flue gas into high-...

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Abstract

The invention discloses a method of advanced oxidation for NO in flue gas and a device thereof. The flue gas after dust collection enters a vapor phase advanced oxidation device, and the method sequentially comprises the following steps of flue gas preconditioning and vapor phase advanced oxidation. The device comprises a flue gas preconditioning segment and a vapor phase advanced oxidation segment, wherein the flue gas preconditioning segment is provided with a process water spray device; and the vapor phase advanced oxidation segment is provided with a ferrous salt spray device and a hydrogen peroxide spray device. The oxidation device for NO is arranged in front of the original wet desulphurization device (or the oxidation device is directly transformed in a flue), so that the originaldesulphurization device has denitration function, and the method has the advantages of convenient transformation, less floor area and low investment and operating costs; the NO oxidation efficiency is more than 85%, the desulphurization efficiency is more than or equal to 96% after washing by a desulphurization tower, the denitration efficiency is more than or equal to 75%, and the method has a certain mercury removal efficiency.

Description

【Technical field】 [0001] The invention relates to the technical field of environmental protection, in particular to an advanced oxidation method and device for NO in flue gas. 【Background technique】 [0002] NO produced during the combustion of fossil fuels X is following SO 2 The important air pollutants that need to be treated urgently in the future, in terms of flue gas denitrification, currently relatively mature technologies include selective catalytic reduction (SCR) technology and selective non-catalytic reduction (SNCR) technology. Admiral NO X Revert to N 2 , the highest denitrification efficiency in commercial operation is SCR technology, which can reach 80% or even more than 90%, but the investment and operation costs are also very expensive, and its initial investment cost is about 60-150 US dollars / kW. [0003] With the continuous improvement of environmental protection requirements, the NO X The emission limit of the denitrification system will become incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/56
Inventor 刘大华戴永阳裴磊周奇材陈江葛介龙
Owner 浙江菲达环保科技股份有限公司
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