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Flue gas desulfurization and denitration system and method

A technology for desulfurization, denitrification and desulfurization systems, applied in the field of flue gas desulfurization and denitrification systems, can solve problems such as difficulty in popularization, poor desulfurization and denitrification effects, etc., and achieve the effects of wide application range, good adjustment characteristics, and guaranteed stability

Pending Publication Date: 2018-10-12
南京石博环保科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems that the traditional semi-dry flue gas desulfurization and denitrification system and method in the prior art have poor desulfurization and denitrification effects and are difficult to popularize, the present invention provides a flue gas desulfurization and denitrification system and method, which combine the rotary spray desulfurization and denitrification system and circulating flow Combining the chemical bed desulfurization system, the step-by-step desulfurization and denitrification of the flue gas is realized, and the desulfurization and denitrification efficiency is high. Desulfurization and denitrification treatment of flue gas with high sulfur and nitrate content, with a wide range of applications

Method used

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  • Flue gas desulfurization and denitration system and method
  • Flue gas desulfurization and denitration system and method
  • Flue gas desulfurization and denitration system and method

Examples

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Effect test

Embodiment 1

[0069] Such as figure 1 As shown, a flue gas desulfurization and denitrification system includes a pre-dust collector 1, a rotary spray desulfurization and denitrification system 3, an induced draft fan 6 and a chimney 10 arranged in sequence, the pre-dust collector 1, the rotary spray desulfurization and denitrification system 3, and an induced draft fan 6 and the chimney 10 are connected sequentially through the flue, and the rotary spray desulfurization and denitrification system 3 is used for preliminary desulfurization and denitrification of flue gas, wherein SO 2 Partially removed, NOx is oxidized to high-valence NO 2 and N 2 o 5A circulating fluidized bed desulfurization system 5 is arranged between the rotary spray desulfurization and denitrification system 3 and the induced draft fan 6, and is communicated in sequence through the flue, and most of the unreacted slaked lime in the rotary spray desulfurization and denitrification system 3 The powder enters the circul...

Embodiment 2

[0078] A flue gas desulfurization and denitrification system of this embodiment has the same basic structure as that of Embodiment 1, the differences and improvements are that:

[0079] Such as image 3 As shown, the rotary spray desulfurization and denitrification system 3 includes a rotary spray desulfurization and denitrification reaction tower 31 and a self-flowing high-level emulsion tank 32, and the self-flowing high-level emulsion tank 32 is arranged above the top of the rotary spraying desulfurization and denitrification reaction tower 31. The forced oxidized milk of slaked lime in the self-flowing high-level emulsion tank 32 flows into the high-speed centrifugal atomizer in the rotary spray desulfurization and denitrification reaction tower 31 through the artesian tube arranged at the bottom of the self-flowing high-level emulsion tank 32 by gravity, Participate in the oxidation reaction in the rotary spray desulfurization and denitrification reaction tower 31 after a...

Embodiment 3

[0085] Such as image 3 As shown, a flue gas desulfurization and denitrification system of this embodiment has the same basic structure as that of Embodiment 2. The difference and improvement is that, further, the middle part of the bottom of the rotary spray desulfurization and denitrification reaction tower 31 is provided with shafts on both sides. To the exhaust device 33, the axial exhaust device 33 on both sides is a T-shaped structure formed by connecting and fixing two steel pipes at 90° to each other, and one of the two steel pipes is vertical One is set vertically, the other is set horizontally, the smoke enters from both ends of the vertically set steel pipe, and then is discharged from the horizontally set steel pipe; , will not affect the swirling air flow in the rotary spray desulfurization and denitrification reaction tower 31, which solves the problem of bias flow in the rotary spray desulfurization and denitrification reaction tower 31, and can prolong the flow...

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Abstract

The invention discloses a flue gas desulfurization and denitration system and method, and belongs to the technical field of flue gas processing. The system comprises a pre-deduster, a rotating spray desulfurization and denitration system, an induced draft fan and a chimney, a circulating fluidized bed desulfurization system is arranged between the rotating spray desulfurization and denitration system and the induced draft fan, and a flue gas mixing axial adjustment damper is arranged between the rotating spray desulfurization and denitration system and the circulating fluidized bed desulfurization system; the system further comprises a booster conveying fan, a material conveying pump I and a material conveying pump II. Accordingly, the rotating spray desulfurization and denitration systemand the circulating fluidized bed desulfurization system are combined, step-by-step desulfurization and denitration on flue gas are achieved, and the desulfurization and denitration efficiency is high; due to step-by-step desulfurization and denitration, the system and method can be applied to desulfurization and denitration processing of the flue gas high in sulfur content and nitrate content, and the application range is high.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, in particular to a flue gas desulfurization and denitrification system and method. Background technique [0002] With the rapid development of my country's economy, the topic of environmental protection continues to come into view. Flue gas treatment is a general direction in the field of environmental protection and has received more and more attention. In recent years, the emission indicators of exhaust gas have become more and more stringent. A 2018 government report states that SO 2 , NOx emissions should be reduced by 3% compared with 2017, and PM2.5 in key areas should continue to decline. Under the guidance of a series of policies, the vast majority of coal-fired power plants have installed denitrification, desulfurization and dust removal devices. In the future, promoting the treatment of flue gas from coal-fired boilers and non-electric industries will be an important task of...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/60B01D46/02
CPCB01D46/02B01D53/60B01D53/80B01D2251/604B01D2251/404B01D2258/0283
Inventor 马贵林周英贵陈思同黄冰冰
Owner 南京石博环保科技有限公司
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