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An integrated method of high gravity complexation ferrous flue gas wet dust removal, desulfurization, denitrification, mercury and arsenic removal

A technology for desulfurization, denitrification, mercury removal, and wet dust removal is applied in the integrated field of supergravity complex ferrous flue gas wet dust removal, sulfurization, nitrification, mercury removal, and arsenic. High, high regeneration efficiency

Inactive Publication Date: 2015-11-25
WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Domestic scholars have reported iron filings, malic acid, vitamin C, etc. to regenerate Fe(III)EDTA, but the key problems of this technology are high operating costs and complicated process routes, and further research is needed

Method used

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  • An integrated method of high gravity complexation ferrous flue gas wet dust removal, desulfurization, denitrification, mercury and arsenic removal

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Comparison scheme
Effect test

Embodiment 1

[0030] High gravity complex ferrous flue gas wet dust removal, desulfurization, denitrification, mercury and arsenic integration method, such as figure 1 shown, including the following steps:

[0031] 1) The flue gas with a dust removal temperature of 120°C is pumped at 400Nm 3 The flow rate of / h is sent to the dust removal and desulfurization supergravity machine, and the SO in the flue gas 2 The concentration is 600-1000ppmv, the NO concentration is 500-800ppmv, and the dust content is 700-1100mg / Nm 3 , Arsenic content 6~20μg / Nm 3 , Mercury content 9~17μg / Nm 3 , Oxygen concentration 2%v, the flue gas is in countercurrent contact with the sodium sulfide aqueous solution pumped into the dust removal and desulfurization supergravity from the storage tank through the pump and the temperature is 20 °C in the rotor packing layer of the supergravity machine, dust removal, desulfurization, mercury removal, and arsenic removal , the volume ratio of flue gas to sodium sulfide aqu...

Embodiment 2

[0038] High gravity complex ferrous flue gas wet dust removal, desulfurization, denitrification, mercury and arsenic integration method, such as figure 1 shown, including the following steps:

[0039] 1) The flue gas at a temperature of 40°C is pumped at 400Nm 3 The flow rate of / h is sent to the dust removal and desulfurization supergravity machine, and the SO in the flue gas 2 The concentration is 1400-2000ppmv, the NO concentration is 500-800ppmv, and the dust content is 700-1100mg / Nm 3 , Arsenic content 6~20μg / Nm 3 , Mercury content 9~17μg / Nm 3 , the oxygen concentration is 3% v, the flue gas is in countercurrent contact with the sodium hydrosulfide aqueous solution pumped into the dust removal and desulfurization supergravity from the storage tank through the pump and the temperature is 0 °C in the rotor packing layer of the supergravity machine, dust removal, desulfurization, mercury removal, dedusting As for arsenic, the volume ratio of flue gas to sodium hydrosulfi...

Embodiment 3

[0046] High gravity complex ferrous flue gas wet dust removal, desulfurization, denitrification, mercury and arsenic integration method, such as figure 1 shown, including the following steps:

[0047] 1) The flue gas at a temperature of 80°C is pumped at 400Nm 3 The flow rate of / h is sent to the dust removal and desulfurization supergravity machine, and the SO in the flue gas 2 The concentration is 1600-2400ppmv, the NO concentration is 500-800ppmv, and the dust content is 700-1100mg / Nm 3 , Arsenic content 6~20μg / Nm 3 , Mercury content 9~17μg / Nm 3 , Oxygen concentration 5%v, the flue gas and the ammonium sulfide aqueous solution pumped into the dust removal and desulfurization supergravity from the storage tank through the pump and the temperature is 35 ℃ are countercurrently contacted in the rotor packing layer of the supergravity machine, dust removal, desulfurization, mercury removal, and arsenic removal , the volume ratio of flue gas to ammonium sulfide aqueous soluti...

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Abstract

The invention discloses an integrated method for wet dedusting, desulfurization, denitrification, demercuration and arsenic removal of supergravity complexed ferrous flue gas. The present invention first utilizes inorganic sulfides to absorb SOx, and at the same time, captures the dust particles in the flue gas. To absorb NOx, inorganic sulfide acts as a reducing agent to regenerate the absorbent. The invention adopts a supergravity machine as gas-liquid mass transfer strengthening equipment, which is beneficial to the removal of dust, SOx, NOx, mercury, arsenic and other toxic substances. The invention has the advantages of simple process, high absorption efficiency, thorough dust removal, a desulfurization rate of over 99%, a denitrification rate of over 96%, and can basically completely remove dust, mercury and arsenic in flue gas.

Description

technical field [0001] The invention relates to the purification of industrial flue gas, in particular to an integrated method for wet dedusting, desulfurization, denitrification, demercuration, and arsenic removal of flue gas with supergravity complexation. Background technique [0002] The pollution of acid rain and its harm have become one of the important environmental issues concerned by countries all over the world. my country is a country where coal is the main energy source. According to survey statistics, more than 90% of SO in my country 2 、More than 67% NO X , More than 70% of the soot emissions come from the combustion of coal. The SO produced by coal combustion 2 and NO X It is the main source of industrial waste gas pollution (acid rain hazard). Nitrogen oxides can also form photochemical pollution, produce the greenhouse effect, destroy the ozone layer, and have toxic effects on the human body. Nitrogen oxides and sulfur oxides can also be converted into...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/50B01D53/56B01D53/64B01D47/00
Inventor 余国贤黄泽朔潘威李海峰路平吴宏观隋志军万昆
Owner WUHAN GLT ENERGY & ENVIRONMENTAL TECH CO LTD
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