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Method of purifying and recycling heavy metals and fluorine, chlorine, sulfur and nitrates in industrial kiln flue gas

A technology of fluochlorothionine and heavy metals, which is applied in the field of purification and resource utilization of heavy metals and flue gas from industrial kilns. Environmental benefits, easy resource utilization, and non-corrosion effects on equipment

Active Publication Date: 2016-12-07
湖南省小尹无忌环境能源科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most desulfurization and denitrification integrated processes are only in the research stage. Although there have been a small number of demonstration application projects, the application of toxic and corrosive process raw materials and high operating costs have restricted their large-scale application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A red brick factory uses coal as fuel, and the flue gas from the factory is directly discharged into the atmosphere through the flue chimney after being dedusted by the dust collector. The flue gas has a pungent smell. The flue gas purification in the test uses the existing flue chimney as the decontamination and oxidation space, and the TR-9300 flue gas online monitoring analyzer from Xi'an Juneng Instrument Co., Ltd. is installed during the test. When not decontaminated and oxidized, online detection of components in flue gas, NO x The content is 976mg / Nm 3 , SO 2 The content is 1287mg / Nm 3 , CO content is 0.43mg / Nm 3 , the mercury content in flue gas sampling was 30.21 μg / Nm 3 , the fluorine content is 26.9mg / Nm 3 , Chlorine content is 45.37mg / Nm 3 , the hydrocarbon content is CH x 2134mg / Nm 3 . In the test, commercially available sodium percarbonate and potassium ferrate were selected as oxidants, and commercially available manganese sulfate and copper su...

Embodiment 2

[0036] A smelter in a mountainous area, the flue gas of the plant is directly discharged into the atmosphere through the flue chimney after being dedusted by the dust collector, and the flue gas has a pungent smell. For the flue gas purification in the test, a decontamination oxidizer is set between the existing flue and the chimney, and the TR-9300 flue gas online monitoring analyzer of Xi'an Juneng Instrument Co., Ltd. is installed during the test. When there is no decontamination and oxidation, online detection of flue gas components, NO in flue gas x The content is 1478mg / Nm 3 , SO 2 The content is 3586mg / Nm 3 , CO content is 0.29mg / Nm 3 , the mercury content in flue gas sampling was 38.44μg / Nm 3 , the fluorine content is 57.3mg / Nm 3 , Chlorine content is 44.37mg / Nm 3 , the hydrocarbon content is CH x 837mg / Nm 3 . In the test, commercially available sodium percarbonate and potassium ferrate were selected as oxidants, commercially available nickel sulfate and cobal...

Embodiment 3

[0042] The flue gas of a heating boiler in a factory is purified. The flue gas of the heating boiler in this factory is dedusted by a water washing dust collector and is directly discharged into the atmosphere from the flue chimney. The flue gas contains a large amount of water vapor and appears white. For the flue gas purification in the test, a decontamination oxidizer is set between the existing flue and the chimney, and the TR-9300 flue gas online monitoring analyzer of Xi'an Juneng Instrument Co., Ltd. is installed during the test. When not decontaminated and oxidized, online detection of harmful components in the flue gas, NO in the flue gas x The content is 1236mg / Nm 3 , SO 2 The content is 886mg / Nm 3 , CO content is 0.19 mg / Nm 3 , the mercury content in flue gas sampling was 20.73μg / Nm 3 , the fluorine content is 12.1mg / Nm 3 , the chlorine content is 16.4mg / Nm 3 , the hydrocarbon content is CH x 217mg / Nm 3 . In the test, commercially available sodium percarbon...

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PUM

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Abstract

A method of purifying and recycling heavy metals and fluorine, chlorine, sulfur and nitrates in industrial kiln flue gas includes the steps of (1), preparing decontaminating oxidant powder or decontaminating oxidant solution; (2), decontaminating and oxidizing; the environment-friendly composite oxidant that is nontoxic, non-corrosive and free of chlorine is used as the process material, flue gas is treated by semi-dry or dry spraying, high oxidative action under neutral to alkaline conditions is utilized to purify sulfur, nitrate, fluorine, chlorine and heavy metal contaminants in the flue gas, incombustible hydrocarbons in the flue gas are oxidatively removed efficiently, decontamination products are recycled as chemical materials or agricultural fertilizers, the method is simple, low in investment and low in operational cost, no corrosion is caused to industrial kiln production line equipment, and the method has good economic and environmental benefits.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for purifying and resource utilization of heavy metals and chlorosulfuric acid in industrial kiln flue gas. Background technique [0002] At present, my country is still a developing country with fossil energy coal as the main energy source. The content of heavy metal mercury in coal generally ranges from 0.01 to 28 mg / kg, and the content of mercury in coal in my country is generally 0.01 to 0.5 mg / kg. About 0.195mg / kg, more than 85% of these mercury are discharged into the atmosphere with the flue gas. The mercury emitted into the atmosphere by coal burning in the world exceeds 3000t every year. The mercury released by coal burning has become the main source of mercury pollution in my country. According to incomplete According to statistics, only one province of Guizhou releases more than 600 tons of mercury every year from coal combustion. In the process of indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/64B01D53/60B01D53/68B01D53/72B01D53/78
CPCB01D53/60B01D53/64B01D53/68B01D53/72B01D53/78B01D2251/10B01D2251/108B01D2251/304B01D2251/306B01D2251/402B01D2251/404B01D2251/408B01D2251/504B01D2251/60B01D2251/608B01D2257/404B01D2258/0283
Inventor 尹小林张永柱
Owner 湖南省小尹无忌环境能源科技开发有限公司
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