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Device and method for valence state conversion and measurement of gaseous mercury

A technology of gaseous mercury and valence state, which is applied in the direction of measuring devices, chemical method analysis, and analytical materials, etc. It can solve the problems that mercury oxide cannot be directly detected, and achieve the effects of flexible and convenient application, protection of instruments, and reduction of misoperation

Pending Publication Date: 2019-05-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Current mercury pollutant detection instruments can only detect elemental mercury, and cannot directly detect oxidized mercury

Method used

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  • Device and method for valence state conversion and measurement of gaseous mercury
  • Device and method for valence state conversion and measurement of gaseous mercury
  • Device and method for valence state conversion and measurement of gaseous mercury

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: as figure 1 A device for gaseous mercury valence conversion and measurement is shown, and the device includes a dust removal filter cartridge 2, a condensation chamber 5, an electric control panel 6, three-way valves 3-1, 3-2, 3- 3, a plurality of peristaltic pumps 7-1, 7-2, 7-3, 7-4 and a plurality of solution storage bottles 8-1, 8-2, 8-3, 8-4, the condensation chamber is set There are first-level absorption bottle 5-1, second-level absorption bottle 5-2, third-level absorption bottle 5-3 and fourth-level absorption bottle 5-4, and the solution storage bottle includes KCl solution storage bottle 8-1, SnCl 2 Solution storage bottle 8-2, alkaline solution storage bottle 8-3 and discharge solution storage bottle 8-4, the dust removal filter cartridge 2 is connected with an air inlet pipeline 1, and the top of the fourth-stage absorption bottle 5-4 is connected with an air outlet pipeline 4.

[0033] The air intake pipeline 1 is connected to the top of the...

Embodiment 2

[0035] Embodiment 2: as Figure 4 As shown, the three-stage absorption bottle 5-3 is composed of two parallel bottles 5-3a and 5-3b, and the four-stage absorption bottle 5-4 is composed of two parallel bottles 5-4a and Composed of bottle body 5-4b; bottle body 5-3a and bottle body 5-3b are connected with three-stage peristaltic pump 7-3a, 7-3b and alkaline solution storage bottle 8-3, bottle body 5-4a and bottle body A four-stage peristaltic pump 7-4 and a discharge solution storage bottle 8-4 are connected to the body 5-4b.

[0036] The tops of the primary absorption bottle 5-1 and the secondary absorption bottle 5-2 are connected to the bottle body 5-3a through pipelines, and the top of the bottle body 5-3a is connected to the bottle body 5-4a through pipelines; The tops of the first-level absorption bottle 5-1 and the second-level absorption bottle 5-2 are connected to the bottle body 5-3b through pipelines, and the top of the bottle body 5-3b is connected to the bottle bo...

Embodiment 3

[0037] Embodiment 3: as figure 1 and 4 As shown, the alkaline solution storage bottle 8-3 is provided with KOH or NaOH solution; the acidic components and water in the gas can be removed through the potassium hydroxide or sodium hydroxide solution bottle and the condensation bottle, so as to ensure that the gas entering the mercury detector is reduced Interference with the mercury measuring instrument, protect the instrument.

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Abstract

The present invention discloses a device and a method for valence state conversion and measurement of gaseous mercury. The device comprises a dust-removal filter cartridge, a condensation chamber, anelectric control panel, a three-way valve, a plurality of peristaltic pumps and a plurality of solution storage bottles. The condensation chamber is provided with a first-stage absorption bottle, a second-stage absorption bottle, a third-stage absorption bottle and a fourth-stage absorption bottle; the dust-removal filter cartridge is connected with an intake pipe, and the top of the fourth-stageabsorption bottle is connected with an outtake pipe; the temperature in the condensation chamber is maintained at 2-6 DEG C by using an electronic condenser; and the three-way valve is arranged on theintake pipe to divide the intake air into two paths to be entered into different absorption bottles. According to the technical scheme of the present invention, the integrated treatment of dust removal, water removal and acid gas removal is performed on the to-be-measured gas, the oxidation state of mercury is converted into zero-valence mercury by using the redox method of chemical solution absorption, and the real-time detection of elemental mercury, oxidized mercury and gaseous total mercury can be realized by using the mercury on-line analyzer.

Description

technical field [0001] The invention relates to the technical field of measuring mercury as a heavy metal in gas, in particular to a device and method for converting and measuring the valence state of gaseous mercury. Background technique [0002] Mercury is a trace heavy metal element with the characteristics of high toxicity, high volatility, migration and bioaccumulation. It can enter the human body through inhalation, skin contact, diet, etc., causing harm to human health and the ecological environment. my country's energy structure is dominated by coal, so coal combustion has become the largest source of atmospheric mercury emissions, accounting for about a quarter of the total anthropogenic mercury emissions. Nowadays, the situation of mercury pollution is severe, and the detection and control technology of mercury pollutants has become a research hotspot in the clean utilization of coal. [0003] Gaseous mercury mainly includes three forms: gaseous elemental mercury ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00
Inventor 段钰锋孟佳琳明祥栋胡鹏张翔
Owner SOUTHEAST UNIV
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