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Device and method of measuring mercury content in smoke

A content and flue gas technology, applied in the field of real-time rapid detection of mercury in flue gas, can solve the problems of slow heat release, low enrichment efficiency, poor measurement accuracy, etc., to increase surface area and density, improve detection rate, and ensure measurement The effect of synchronous results

Inactive Publication Date: 2020-03-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a device and method for measuring mercury content in flue gas for the problems of low enrichment efficiency, poor consistency, slow heat release speed and poor measurement accuracy in the prior art.

Method used

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  • Device and method of measuring mercury content in smoke
  • Device and method of measuring mercury content in smoke
  • Device and method of measuring mercury content in smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] combine as figure 1 Described overall device, the mercury concentration is 20ng / m 3 The mercury-containing flue gas passes through the flue gas sampling pretreatment module at a flow rate of 1L / min to filter out dust and particulate matter in the flue gas, and the mercury gas in the mercury-containing flue gas passes through the condenser to cool the flue gas, and then passes through the Enter the mercury enrichment module containing 4 gold silk cakes and 3 gold silk ball columns as an enrichment area for enrichment. The time for introducing mercury-containing flue gas is 60s. After the enrichment is stopped, the electromagnetic induction heating module is turned on. , using a 9-turn electromagnetic induction coil to heat the enrichment area, the heating time is 70s, the temperature is controlled at 700°C to 900°C, after the electromagnetic induction heating is stopped, 300ml / min of argon carrier gas is introduced, and the argon gas is used to Load the mercury released...

Embodiment 2

[0038] combine as figure 1 Described overall device, the mercury concentration is 20ng / m 3 The mercury-containing flue gas passes through the flue gas sampling pretreatment module at different flow rates. The mercury-containing flue gas flow rate ranges from 250mL / min to 2L / min. Each experiment increases the flow rate at an interval of 250mL / min to filter out the flue gas. Dust, particulate matter, etc., the mercury gas in the mercury-containing flue gas passes through the condenser to cool the flue gas, and then passes it into the mercury enrichment module containing 4 gold silk cakes and 3 gold silk ball columns as an enrichment area Enrichment is carried out in the middle, and the time for introducing mercury-containing flue gas is 60s. After the enrichment is stopped, the electromagnetic induction heating module is turned on, and a 9-turn electromagnetic induction coil is used to heat the enrichment area. The heating time is 70s, and the temperature is controlled at 700 ℃...

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Abstract

The invention discloses a device and method of measuring mercury content in smoke. The device comprises a smoke sampling pretreatment module, an Ar gas storage bottle, a mercury enrichment module, anelectromagnetic induction heating module and a mercury content detection module, wherein the mercury enrichment module comprises a quartz outer tube and metallic iron inner tubes, a gold wire cake isarranged between every two adjacent metallic iron inner tubes, and a gold wire ball column is arranged in each metallic iron inner tube; and the metallic iron inner tubes, the gold wire cakes and thegold wire ball columns form an enrichment region. According to the method, treated mercury-contained smoke is introduced into the enrichment region, and mercury in the smoke is made to form gold-amalgam; then the enrichment region is made to generate an eddy current through electromagnetic induction heating, and the mercury is subjected to pyrolysis; and then argon is used for loading mercury steam obtained after pyrolysis into the mercury concentration detection module for measurement. The method has the advantages that enrichment is efficient, pyrolysis is fast, and meanwhile the occurrencestate of the mercury in the smoke in the mercury enrichment module is considered; and the problems that in current mercury enrichment module application, enrichment efficiency is low, pyrolysis speedis low, and consistency is poor are solved.

Description

technical field [0001] The invention relates to a device and method for measuring mercury content in flue gas, in particular to using electromagnetic induction to heat gold amalgam in a rapid thermal desorption mercury enrichment module to realize real-time and rapid detection of mercury in flue gas. Background technique [0002] Mercury and its compounds are a class of toxic and harmful substances. A small dose of mercury can cause great harm to human health and the natural environment such as ecological water, soil, and atmosphere, and it is difficult to completely eliminate it, which has aroused widespread concern around the world. Mercury that enters the atmosphere evolves into a global pollutant under the action of atmospheric movement, and the environmental pollution of mercury is mostly caused by the release of mercury caused by human development and use of mercury. In addition to natural causes such as volcanic eruptions, rock weathering, and forest fires, human acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/34G01N1/44
CPCG01N1/28G01N1/34G01N1/4022G01N1/44
Inventor 彭志敏丁艳军王振
Owner TSINGHUA UNIV
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