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A method for washing and removing elemental mercury in mercury-containing gas by using ultra-fine nano-sulfur solution

An ultra-fine nano-sulfur solution technology, which is applied in separation methods, gas treatment, chemical instruments and methods, etc., can solve the problems of low mercury removal efficiency, small adsorption capacity, poor capture ability, etc., and achieve hydrophilicity and Good dispersion performance, efficient removal, no secondary pollution effect

Active Publication Date: 2020-07-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems such as poor capture ability of gaseous mercury, small adsorption capacity, and low mercury removal efficiency caused by the poor hydrophilicity and dispersion of sulfur, sulfur particles are nano-sized to improve their hydrophilicity in aqueous solution. Dispersion, while improving the activity of sulfur, improving the surface properties of sulfur particles, improving its complexation reaction ability to gaseous elemental mercury, and realizing the efficient removal of elemental mercury in gas by wet method. This method has the characteristics of simple process, low price, and environmental protection. , can achieve efficient purification of elemental mercury in flue gas

Method used

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  • A method for washing and removing elemental mercury in mercury-containing gas by using ultra-fine nano-sulfur solution
  • A method for washing and removing elemental mercury in mercury-containing gas by using ultra-fine nano-sulfur solution
  • A method for washing and removing elemental mercury in mercury-containing gas by using ultra-fine nano-sulfur solution

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Experimental program
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Effect test

Embodiment 1

[0026] Add 100ml of Na at a concentration of 0.5mol / L at room temperature 2 S 2 o 3 3 ml of saturated sodium dodecylbenzenesulfonate solution was added to the solution as a dispersant, ultrasonically stirred continuously and formic acid was added drop by drop to adjust the pH of the solution to 1.2 to obtain a nano-sulfur colloidal solution. at 0.3m 3 / min gas flow will gas (Hg 0 The concentration is 0.35mg / m 3 , the carrier gas is N 2 ), placed in a bubbling scrubber filled with 75ml ultrafine nano-sulfur solution at room temperature, Hg 0 The removal rate can reach 84.4%.

Embodiment 2

[0028] Add 100ml of Na at a concentration of 0.5mol / L at room temperature 2 S 2 o 3 3 ml of saturated sodium dodecylbenzenesulfonate solution was added to the solution as a dispersant, ultrasonically stirred continuously and concentrated sulfuric acid was added drop by drop to adjust the pH of the solution to 0.5 to obtain a nano-sulfur colloidal solution. at 0.3m 3 / min gas flow will gas (Hg 0 The concentration is 0.35mg / m 3 , the carrier gas is N 2 ), placed in a bubbling scrubber filled with 75ml ultrafine nano-sulfur solution at room temperature, Hg 0 The removal rate can reach 79.2%.

Embodiment 3

[0030] 100ml of 0.5mol / L concentration of NaHSO 3 Under the action of selenium, the solution was heated in a water bath at 100°C for 4 hours, then 3ml of saturated sodium dodecylbenzenesulfonate solution was added as a dispersant, and ultrasonically stirred continuously and formic acid was added drop by drop to adjust the pH of the solution to 1.2 to obtain nano Sulfur colloidal solution. at 0.3m 3 / min gas flow will gas (Hg 0 The concentration is 0.35mg / m 3 , the carrier gas is N 2 ), placed in a bubbling scrubber filled with 75ml ultrafine nano-sulfur solution at room temperature, Hg 0 The removal rate can reach 71.7%.

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Abstract

The invention discloses a method for removing elemental mercury in mercury-containing gas by washing through an ultra-fine nano sulfur solution. According to the method, the Hg<0>-containing gas and the ultra-fine nano sulfur solution are subjected to a gas-solution mixing reaction, and the elemental mercury in the Hg<0>-containing gas is removed. The method has the characteristics of simple technology, low price and environmental friendly, and can achieve efficient purification of the elemental mercury.

Description

technical field [0001] The invention relates to a method for treating mercury-containing gas, in particular to a method for removing elemental mercury in mercury-containing gas by wet washing with ultrafine nanometer sulfur solution, and belongs to the technical field of mercury vapor pollution control and emission reduction. Background technique [0002] Mercury is a highly toxic pollutant, and its environmental and health problems have become one of the hot spots in the world. Therefore, on April 28, 2016, the twentieth meeting of the Standing Committee of the Twelfth National People's Congress of my country decided to ratify the Minamata Convention on Mercury signed in Kumamoto on October 10, 2013, and in August 2017 On March 16, the convention came into force, and a series of measures dedicated to the control of mercury pollution and emission reduction were implemented simultaneously, pushing the pollution control and emission reduction of mercury-containing flue gas to a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/64B01D53/78
CPCB01D53/64B01D53/78B01D2257/602
Inventor 刘恢颜旭谢小峰陈昊陈志军杨姝刘操柴立元杨志辉
Owner CENT SOUTH UNIV
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