Device for producing mercury standard gas and divalent mercury standard gas on basis of saturation principle

Abstract

The invention discloses a device for producing mercury standard gas and divalent mercury standard gas on the basis of the saturation principle. The device comprises an element mercury standard gas generating system and a divalent mercury standard gas generating system, wherein the element mercury standard gas generating system comprises a first carrier gas device and an element mercury generator which are sequentially connected by the aid of a pipeline, and the element mercury generator is used for producing mercury gas; the divalent mercury standard gas generating system comprises a plasma gas source device, a gas premixing chamber and a divalent mercury generator which are sequentially connected by the aid of a pipeline, the divalent mercury generator is used for producing divalent mercury gas, the gas premixing chamber is further connected with an outlet of the element mercury generator and is used for mixing a plasma gas source with mercury-containing gas produced by the element mercury generator, the divalent mercury generator is provided with a high-frequency high-voltage alternating-current power generator and is used for producing plasma to oxidize the mercury-containing gas into divalent mercury gas, the element mercury standard gas and the divalent mercury standard gas are obtained simultaneously, the same mercury source is adopted, the problem that source tracing delivery is required to be performed twice due to inconsistent mercury sources caused by adoption of the different mercury sources is solved, and operation steps are simplified.

Description

technical field [0001] The invention belongs to the field of gaseous mercury monitoring, in particular to a device for generating mercury and divalent mercury standard gas based on the principle of saturation. Background technique [0002] Mercury (Hg) is a global heavy metal pollutant. It stays in the atmosphere for a long time and has a cumulative effect in organisms. Therefore, mercury pollution causes great harm to the environment and human health. Man-made emissions are the main source of mercury pollution, especially in China. As my country pays more and more attention to environmental protection, the emission standards of flue gas mercury from stationary pollution sources will become increasingly strict. Therefore, it is of great significance to develop online monitoring devices and methods for flue gas mercury from stationary pollution sources. [0003] Mercury in exhaust gas (such as flue gas, etc.) mainly exists in the form of compound state and elemental form, an...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problem that divalent mercury standard gas and elemental mercury standard gas cannot be produced at the same time in the prior art, and the mercury source is inconsistent and needs to be traced twice, and then provides a method based on the principle of saturation to generate mercury and divalent mercury. Mercury standard gas device

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