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Flue gas desulfurization and denitrification method for generating pulsed power supply based on nanosecond-grade plasma

A desulfurization and denitrification, plasma technology, applied in the field of flue gas desulfurization and denitrification, can solve the problems of low power utilization efficiency, high energy consumption, low repetition frequency, etc., to reduce energy consumption, narrow pulse width, and sharpen pulse front Effect

Inactive Publication Date: 2018-11-02
ZHEJIANG DOWAY ADVANCED TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pulse corona discharge flue gas desulfurization and denitrification technology is an existing desulfurization and denitrification technology. The power supply structure adopted by the existing desulfurization and denitrification equipment has low repetition frequency, low power utilization rate and plasma generation efficiency, and high energy consumption. Big

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A flue gas desulfurization and denitrification method based on nanosecond plasma to generate pulsed power supply, comprising the following steps:

[0022] S1: Primary dust removal, the flue gas in the boiler enters the dust collector through the pipe under the introduction of the fan for dust removal treatment;

[0023] S2: Humidification and cooling, the flue gas after dust removal enters the humidification and cooling tower through the pipe for spraying and cooling treatment;

[0024] S3: Reactor treatment, the cooled flue gas enters the pulse discharge desulfurization and denitrification reactor, and ammonia gas is added at the reactor inlet, and the pulse corona discharge and ammonia synergistically convert SO2 and NOX into ammonium salts in the reactor Fine particles are collected as the flue gas enters the product collection device;

[0025] S4: Secondary dust removal, the uncollected product enters the dust collector again with the flue gas for dust removal trea...

Embodiment 2

[0035] A flue gas desulfurization and denitrification method based on nanosecond plasma to generate pulsed power supply, comprising the following steps:

[0036] S1: Primary dust removal, the flue gas in the boiler enters the dust collector through the pipe under the introduction of the fan for dust removal treatment;

[0037] S2: Humidification and cooling, the flue gas after dust removal enters the humidification and cooling tower through the pipe for spraying and cooling treatment;

[0038] S3: Reactor treatment, the cooled flue gas enters the pulse discharge desulfurization and denitrification reactor, and ammonia gas is added at the inlet of the reactor, and the pulse corona discharge and ammonia synergistically convert SO2 and NOX into ammonium salts in the reactor Fine particles are collected as the flue gas enters the product collection device;

[0039] S4: Secondary dust removal, the uncollected product enters the dust collector again with the flue gas for dust remov...

Embodiment 3

[0049] A flue gas desulfurization and denitrification method based on nanosecond plasma to generate pulsed power supply, comprising the following steps:

[0050] S1: Primary dust removal, the flue gas in the boiler enters the dust collector through the pipe under the introduction of the fan for dust removal treatment;

[0051] S2: Humidification and cooling, the flue gas after dust removal enters the humidification and cooling tower through the pipe for spraying and cooling treatment;

[0052] S3: Reactor treatment, the cooled flue gas enters the pulse discharge desulfurization and denitrification reactor, and ammonia gas is added at the inlet of the reactor, and the pulse corona discharge and ammonia synergistically convert SO2 and NOX into ammonium salts in the reactor Fine particles are collected as the flue gas enters the product collection device;

[0053] S4: Secondary dust removal, the uncollected product enters the dust collector again with the flue gas for dust remov...

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PUM

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Abstract

The invention discloses a flue gas desulfurization and denitrification method for generating a pulsed power supply based on nanosecond-grade plasma. The method comprises the following steps: (S1) primary dust removal, (S2) humidifying cooling, (S3) reactor treatment, (S4) secondary dust removal and (S5) discharging. The flue gas desulfurization and denitrification method for generating the pulsedpower supply based on the nanosecond-grade plasma is strictly controlled, a pulsed power supply is generated by virtue of the nanosecond-grade plasma, a circuit is adopts a high-power pulse and magnetic compression techniques, a three-phase rectifying circuit generates a direct current bus voltage, and a microsecond-grade low-voltage pulse is generated by a pulse generating device, is boosted to be a high-voltage pulse by a pulse booster and is compressed into a nanosecond-grade high-voltage pulse by a pulse compression device, so that the aims of steepening a pulse front edge, narrowing a pulse width and improving the repetition frequency are achieved, and then the ultralow environment-friendly requirements on desulfurization, denitrification and dust removal are realized; and compared with power supplies in other forms, the method has the advantages that the energy consumption is reduced, the utilization rate of electric energy is increased, and the generation efficiency of the plasma is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a flue gas desulfurization and denitrification method based on pulse power generated by nanosecond plasma. Background technique [0002] With the development of flue gas desulfurization and denitrification technology, all countries have carried out research on flue gas simultaneous desulfurization and denitrification technology, with the purpose of developing a new SOX / NOX combined desulfurization technology with a lower cost than the traditional FGD and SCR combined process. The new process is in the development stage and has not yet been applied commercially. Dust is one of the important sources of pollution. The exhaust gas from coal-fired boilers contains a large amount of SO2, nitrogen oxides, and a large amount of soot. Therefore, dust removal must be considered while desulfurization and denitrification. [0003] Pulse corona discharge flue gas desulfurization a...

Claims

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Application Information

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IPC IPC(8): B01D53/76B01D53/60
CPCB01D53/60B01D53/76B01D2251/2062B01D2258/0283B01D2259/818Y02A50/20
Inventor 施小东祝建军舒贝利杨浩明罗磊
Owner ZHEJIANG DOWAY ADVANCED TECH CO LTD
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