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Implementing method for integrated distributed desulfurization and denitrification process of boiler flue gas

A technology for desulfurization and denitrification, boiler flue gas, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problem of low denitrification capacity, and achieve the effect of improving desulfurization and denitrification efficiency, reducing operating costs, and saving oxidants

Inactive Publication Date: 2015-11-18
JIANGSU YITONG ENVIRONMENTAL PROTECTION ENG TECH
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Problems solved by technology

But its denitrification ability is not high

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  • Implementing method for integrated distributed desulfurization and denitrification process of boiler flue gas

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 As shown, the implementation method of a boiler flue gas integrated distributed desulfurization and denitrification process in this embodiment adopts the route of dust removal-desulfurization-oxidation-denitration, and the dust removal adopts the bag filter 1; then enters the desulfurization tower 2, The desulfurization tower 2 uses a packed tower, and the absorbent is a dilute solution of sodium hydroxide; then it enters the oxidation tower 3 for primary oxidation and absorption, and a part of NO is oxidized to NO 2 , the oxidation tower 3 adopts the method of sequential spraying, and the flue gas after the primary oxidation then enters the denitrification tower 4 for secondary absorption and oxidation, and most of the NO is oxidized to NO 2 And absorb, adopt the way of packed tower. The primary oxidation oxidant is ...

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Abstract

The invention relates to an implementing method for an integrated distributed desulfurization and denitrification process of boiler flue gas. The implementing method is characterized by comprising the following steps: step I, flue gas enters a desulfurization tower from the lower part after passing through a dust remover, slurry in a slurry pond is conveyed to a spray nozzle at the upper part of the desulfurization tower through a circulating pump for spraying, and purified flue gas enters an oxidization tower after being subjected to demisting through a demister; step II, the flue gas enters the oxidization tower from the top, the slurry in the slurry pond is conveyed to a spray nozzle at the upper part of the oxidization tower through the circulating pump for spraying and oxidized flue gas passes through a wire mesh demister and then enters a denitrification tower; step III, flue gas enters the denitrification tower from the lower part, three-layer spraying exists in the tower, the first layer of slurry and the third layer slurry are respectively conveyed to a spray nozzle at the lower layer and a spray nozzle at the upper layer through the circulating pump for spraying, and in the second layer, an externally-connected H2O2 solution is used for spraying so as to realize the process of absorption-oxidation-absorption, and purified flue gas is discharged through a chimney after being subjected to demisting through the demister at the upper part of the denitrification tower.

Description

technical field [0001] The invention relates to the field of environmental protection, and relates to a method for purifying flue gas discharged from a coal-fired boiler, in particular to a method for realizing an integrated distributed desulfurization and denitrification process for boiler flue gas. Background technique [0002] With the development of our country's economy, our country's demand and consumption of energy have increased significantly. A large amount of fossil fuels release SO2, NOx, dust and other pollutants during the combustion process, which has brought serious environmental problems, and has also promoted fuel, especially It is the research and development of clean coal combustion technology, among which the emission control technology of sulfur dioxide and nitrogen oxides from coal combustion is a hot topic in international research in recent years. At present, most of the processes and equipment used for flue gas desulfurization, denitrification and fl...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/60F23J15/04
CPCY02A50/20
Inventor 赵海浩管振泳
Owner JIANGSU YITONG ENVIRONMENTAL PROTECTION ENG TECH
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