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Flue-gas processing technique based on adsorbent-polymer composite material

A technology of composite materials and fluoropolymers, applied in air quality improvement, other chemical processes, separation methods, etc., can solve problems such as consumption of activated carbon, complex and expensive desulfurization devices, and secondary pollution

Active Publication Date: 2011-07-06
WL GORE & ASSOC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of the activated carbon regeneration process are: 1. consumption of activated carbon, 2. secondary pollution, such as low concentration of sulfuric acid solution, 3. making the whole desulfurization unit complicated and expensive

Method used

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  • Flue-gas processing technique based on adsorbent-polymer composite material
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  • Flue-gas processing technique based on adsorbent-polymer composite material

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Embodiment Construction

[0040] DETAILED DESCRIPTION OF THE INVENTION: The present invention involves a process for simultaneously removing sulfur oxides, mercury vapor, and fine dust from flue gas using a sorbent-polymer composite (SPC). The present invention includes the SPC material itself. The process of the present invention converts sulfur oxide into a sulfuric acid solution, which has a relatively high concentration of sulfuric acid and can be used as a salable product. The process of the invention fixes mercury molecules inside the material by means of chemical adsorption, and captures dust particles on the porous polytetrafluoroethylene film layer on the outer surface of the SPC by means of surface filtration.

[0041] SO x Scavenging: Adsorbent materials, especially activated carbon, have proven to be a viable material for scavenging sulfur oxides from flue gases. In a typical sorbent-based desulfurization process, flue gas is introduced and passed through a sorbent bed, where sulfur oxide...

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Abstract

The present invention provides one process of eliminating air pollutant, such as sulfur oxide, nitrogen oxide, mercury vapor and fine dust, from industrial fume. The process is based on one kind of microporous adsorbent-fluoride polymer composite material, which converts the sulfur oxide into acid solution and excludes the acid solution to its outer surface and needs no complicated regeneration. Inside the adsorbent chamber with the modularized composite material, sulfur oxide is converted into high concentration sulfuric acid and thus eliminated from the fume. The composite material adsorbs the mercury vapor inside it via chemical adsorption and eliminates fine dust via surface filtering. The converted sulfuric acid and the fine dust on the surface of the composite material drops into one acid collector.

Description

technical field [0001] The invention is used for the removal of sulfur dioxide, sulfur trioxide, nitrogen oxide, mercury vapor, and fine dust in industrial waste gas. For example, flue gas treatment in thermal power plants. Background technique [0002] Coal-fired thermal power plants, municipal waste incinerators, and oil refineries release a large amount of flue gas every day. Flue gas contains various air pollutants, such as: sulfur oxides (SO 2 and SO 3 ), nitrogen oxides (NO and NO 2 ), mercury (Hg) vapor, and dust (PM). In the United States or China, the annual SO 2 As much as 2.7 million tons, and as much as 45 tons of mercury vapor. [0003] The hazards of coal-burning pollutants to human health and the ecological environment have long been known to the public. For example, sulfur oxides and nitrogen oxides can cause outbreaks of respiratory diseases in affected areas. They are also the cause of acid rain. And acid rain all plays great destructive effect to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/02B01J20/00
CPCY02A50/20
Inventor 陆小春吴肖群
Owner WL GORE & ASSOC INC
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