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Method and device for continuous measurement of mercury in hydrocarbon-containing gas

A hydrocarbon gas and measurement device technology, which is applied in the field of mercury detection, can solve the problems of harsh gas conditions and inability to measure mercury, and achieve the effects of good applicability, elimination of the influence of hydrocarbon substances, and simple methods

Active Publication Date: 2016-04-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (1) Due to the presence of strong interfering gases, commercial continuous mercury analyzers cannot measure mercury in complex gases
[0007] (2) Existing technology obtains the mercury content in complex gases by deducting the background value, which is applicable to harsh gas conditions

Method used

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  • Method and device for continuous measurement of mercury in hydrocarbon-containing gas
  • Method and device for continuous measurement of mercury in hydrocarbon-containing gas

Examples

Experimental program
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Effect test

Embodiment 1

[0060] NiO is used as the oxygen carrier metal oxide, and quartz sand is used as the skeleton. The mass ratio of NiO to quartz sand is 1:9, and the particle size is 20 mesh. loading in figure 2 In the reactor, the loading length is 150 mm. When the temperature is 700°C, it reacts with pure methane gas, and the recorded reaction time is 12 minutes.

Embodiment 2

[0062] NiO is used as the oxygen carrier metal oxide, and quartz sand is used as the skeleton. The mass ratio of NiO to quartz sand is 2:8, and the particle size is 20 mesh. loading in figure 2 In the reactor, the loading length is 150mm. React with pure methane gas at a temperature of 700°C, and record the reaction time as 20 minutes.

Embodiment 3

[0064] NiO is used as the oxygen carrier metal oxide, and quartz sand is used as the skeleton. The mass ratio of NiO to quartz sand is 3:7, and the particle size is 20 mesh. loading in figure 2 In the reactor, the loading length is 150mm. When the temperature is 700°C, it reacts with pure methane gas, and the recorded reaction time is 28 minutes.

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Abstract

The invention provides a method for measuring mercury in hydrocarbon-containing gas. The method comprises the following specific steps: applying the hydrocarbon-containing gas to be measured to a metal oxygen carrier under a heating environment; converting hydrocarbon substances, which disturb mercury measurement, into carbon dioxide and water through the oxidizing reaction of the hydrocarbon substances and the metal oxygen carrier; removing water vapor in the reacted gas; measuring the mercury through a mercury vapor analyzer. The invention also provides a measurement device for implementing the method. The measurement device is structurally characterized in that a first mass flow meter is in sequential pipeline connection with a first valve, a first reactor, a dehumidification device and the mercury vapor analyzer, wherein the first reactor is used for accommodating the metal oxygen carrier and is arranged in an electric heating furnace; the electric heating furnace is connected with a temperature controller; the dehumidification device is connected with a refrigerator. The hydrocarbon substances can be oxidized into the carbon dioxide and the water through the metal oxygen carrier at high temperature, so that the influence on the mercury vapor analyzer caused by the hydrocarbon substances is eliminated, the hydrocarbon substances can be removed, and meanwhile the influence on the mercury vapor analyzer caused by other interference gas can be eliminated. The measurement device is easy to operate and high in applicability.

Description

technical field [0001] The invention belongs to the technical field of mercury detection, in particular to a continuous measurement method and device for mercury in hydrocarbon-containing gas, which is used for mercury in gases containing hydrocarbon interfering substances such as pyrolysis gas, gasification gas, petroleum gas or coal bed methane Measurement. Background technique [0002] As a toxic heavy metal element, mercury will cause certain harm to humans and organisms. Mercury has a life cycle of 2-3 years in the atmosphere. With the flow of the atmosphere, the mercury emitted by humans will be brought to all parts of the world. Mercury will transform into a more toxic form of organic mercury (such as methylmercury) in a suitable environment, and then accumulate to higher organisms through the food chain, and finally enter the human body. [0003] Controlling the emission of mercury is a common problem faced by the whole world. The use of fossil energy accounts for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N1/34
Inventor 罗光前姚洪张璧姚宇欣
Owner HUAZHONG UNIV OF SCI & TECH
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