Removal of SO2 and NOx by Pulsed Corona Combined with in situ Ca(OH)2 Absorption

Abstract

Abstract: Removal of SO₂ and NO_x by pulsed corona combined with in situ alkali absorption was experimentally investigated.In the reactor,a plate-wire-plate combination is devised for generating pulsed corona and then alkaline absorbent slurries were introduced into the reactor by a continuous band conveying system to capture the gaseous reaction products.It was found that both SO₂ and NO could be removed by corona combined with in situ alkali absorption.The removal of SO₂ increased to 75% with the corona discharge,compared with 60% removal only with Ca(OH)₂ absorption.About 40% removal of NO was reached by pulsed corona combined with in situ Ca(OH)₂ absorption.It was found that SO₂ and NO in the gas stream are oxidized to SO₃ and NO₂ by pulsed corona respectively,and then absorbed by the alkali in the reactor.The removals of SO₂ as well as NO were higher with Ca(OH)₂ as the absorbent,compared with using CaCO₃ or ZnO.

Key words: pulsed corona, absorption, denitrification, desulfurization, removal, Ca(OH)₂

摘要： Removal of SO₂ and NO_x by pulsed corona combined with in situ alkali absorption was experimentally investigated.In the reactor,a plate-wire-plate combination is devised for generating pulsed corona and then alkaline absorbent slurries were introduced into the reactor by a continuous band conveying system to capture the gaseous reaction products.It was found that both SO₂ and NO could be removed by corona combined with in situ alkali absorption.The removal of SO₂ increased to 75% with the corona discharge,compared with 60% removal only with Ca(OH)₂ absorption.About 40% removal of NO was reached by pulsed corona combined with in situ Ca(OH)₂ absorption.It was found that SO₂ and NO in the gas stream are oxidized to SO₃ and NO₂ by pulsed corona respectively,and then absorbed by the alkali in the reactor.The removals of SO₂ as well as NO were higher with Ca(OH)₂ as the absorbent,compared with using CaCO₃ or ZnO.

关键词: pulsed corona, absorption, denitrification, desulfurization, removal, Ca(OH)₂

HUANG Liwei, DANG Yongxia. Removal of SO₂ and NO_x by Pulsed Corona Combined with in situ Ca(OH)₂ Absorption[J]. , 2011, 19(3): 518-522.

黄立维, 党永霞. Removal of SO₂ and NO_x by Pulsed Corona Combined with in situ Ca(OH)₂ Absorption[J]. , 2011, 19(3): 518-522.

References

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Removal of SO₂ and NO_x by Pulsed Corona Combined with in situ Ca(OH)₂ Absorption

Removal of SO₂ and NO_x by Pulsed Corona Combined with in situ Ca(OH)₂ Absorption

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