Streamer corona plasma flue gas denitrification method

A streamer discharge and plasma technology, applied in the field of plasma flue gas denitrification, can solve the problems of secondary pollution, high operating cost, ammonia leakage, etc., and achieve the effects of mild reaction conditions, high denitration efficiency and low resistance

Inactive Publication Date: 2012-11-07
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Claims
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Problems solved by technology

SCR technology has the following problems: the catalyst is expensive, easy to poison and lose reactivity, resulting in high operating costs; ammonia remains in the reactor, forming sulfuric acid such as ammonium sulfate to block equipment, ammonia leakage forms secondary pollution; carbon monoxide is used as catalyst, the same will reduce thermal effici...

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  • Streamer corona plasma flue gas denitrification method

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Embodiment 1

[0022] Such as figure 1 As shown in the streamer discharge plasma flue gas denitrification method, the dust-removed flue gas 1 first enters the streamer discharge oxidation reactor 2, and in the oxidation reactor, the electric field space is formed by the cathode 201 and the anode 202, and the 50-100kV The high-voltage power supply discharges, the ionized gas generates active free radicals, and the active free radicals react with NO in the flue gas to oxidize NO into higher valence nitrogen oxides such as NO 2 , N 2 o 3 , N 2 o 5 . Then, the flue gas enters the absorption tower again, from bottom to top, and the NH-containing gas ejected from the spray layer 5 3 ·H 2 The circulating spray absorption liquid of O is in countercurrent contact, the nitrogen oxides in the flue gas are absorbed into the liquid phase, and NH 3 ·H 2 O reacts to form NH 4 NO 2 , NH 4 NO 3 The ammonium salt mixed solution obtained enters the liquid storage tank 302, and then is sent to the s...

Embodiment 2

[0027] Such as figure 1 As shown in the streamer discharge plasma flue gas denitrification method, the dust-removed flue gas 1 first enters the streamer discharge oxidation reactor 2, and in the oxidation reactor, the electric field space is formed by the cathode 201 and the anode 202, and the 10-50kV The high-voltage power supply discharges, ionizes the flue gas to generate active free radicals, and the active free radicals react with NO in the flue gas to oxidize NO into higher valence nitrogen oxides such as NO 2 , N 2 o 3 , N 2 o 5 . Then, the flue gas enters the absorption tower again, and the flue gas is from bottom to top, and the NH-containing 3 ·H 2 The circulating spray absorption liquid of O is in countercurrent contact, the nitrogen oxides in the flue gas are absorbed into the liquid phase, and NH 3 ·H 2 O reacts to form NH 4 NO 2 , NH 4 NO 3 The ammonium salt mixed solution obtained enters the liquid storage tank 302, and then is sent to the spray laye...

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Abstract

The invention discloses a streamer corona plasma flue gas denitrification method which comprises the following steps of: 1, sending boiler flue gas containing nitric oxide to a streamer corona oxidation reactor after being subjected to dust removal, and under an environment of streamer corona discharge, oxidizing low valent nitric oxide into high valent nitric oxide; 2, enabling the boiler flue gas after passing through the streamer corona oxidization reactor to enter an absorption tower for circularly spraying and absorbing, and enabling the high valent nitric oxide in the flue gas to enter a liquid phase; and 3, discharging the flue gas subjected to circular spraying and absorbing through a chimney after being subjected to defogging. The streamer corona plasma flue gas denitrification method has the advantages of high denitrification efficiency, denitrification capacity, no need of catalysts, wild reaction conditions, little resistance and low energy consumption; and NOx is recycled, and a byproduct of an NH3NO3 fertilizer is obtained.

Description

technical field [0001] The invention relates to a streamer discharge plasma flue gas denitrification method. Background technique [0002] At present, NO in coal-fired flue gas X There are mainly two kinds of control methods: pre-combustion control and post-combustion control. The pre-combustion control is mainly low-nitrogen combustion technology, which reduces the formation of nitrogen oxides by improving the combustion state and fuel denitrification, such as the use of low-nitrogen oxide boilers; but due to some control of combustion process NO X The generated technology often reduces thermal efficiency, increases incomplete combustion loss, and increases equipment scale, while NO X The amount of reduction is limited, therefore, it has not yet fully reached the practical stage. Post-combustion control mainly includes: Selective Catalytic Reduction (SCR), Selective Non-Catalytic Reduction (SNCR) and biological filtration denitrification methods. SCR technology has the ...

Claims

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Application Information

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IPC IPC(8): B01D53/76B01D53/56
Inventor 刘勇胡小吐邓康
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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