Online detection device for gaseous mercury atoms

Abstract

An online detection device for gaseous mercury atoms comprises a lamp holder for installing a mercury lamp and a shell provided with two air chambers, the two air chambers of the shell are arranged in the shell side by side in a penetrating mode, each air chamber is provided with an air inlet and an air outlet, the air outlet of the first air chamber is connected with the air inlet of the second air chamber through a mercury filter bottle, the mercury-containing gas in the first gas chamber enters the second gas chamber after being filtered, one ends of the two gas chambers are respectively provided with the optical filters, the other ends of the two gas chambers are respectively provided with the light-transmitting pieces, and the lamp holder is arranged at the ends, provided with the optical filters, of the two gas chambers. Two light passing holes are formed in the positions, where mercury lamps are installed, of the lamp holder respectively and correspond to the light filters of the two air chambers, two side-by-side photodiodes are arranged outside the shell, the two photodiodes correspond to the light-transmitting pieces of the two air chambers respectively, and the photodiodes are electrically connected with a control system through a detection circuit, are usde for converting he light signal of the mercury lamp penetrating through the gas chamber into an electric signal.

Description

technical field [0001] The invention relates to the technical field of mercury atom detection, in particular to an online gaseous mercury atom detection device. Background technique [0002] Mercury is a highly toxic and non-essential element that can circulate completely in the ecosystem. Mercury and inorganic mercury compounds are listed as Class 3 carcinogens by the World Health Organization, and are also included in the list of toxic and harmful water pollutants in my country. Under the background of increasingly stringent environmental protection requirements and the continuous improvement of domestic mandatory standards for mercury emissions in flue gas, the monitoring of mercury in flue gas is the most direct and effective means to feedback mercury emissions. In particular, the online mercury monitoring technology can reflect the current mercury emissions in real time, which is not only conducive to the self-examination of enterprises, but also conducive to the superv...

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Problems solved by technology

[0003] At present, the laboratory method is usually used in domestic monitoring of flue gas emissions, that is, after on-site sampling, mercury detection is performed on the samples in the laboratory. Since this method needs to cool and collect high-temperature gas, the operation is complicated and difficult to realize. Difficult, a single detection takes a long time, and the workload and difficulty are relatively large, so it is not suitable for online flue gas mercury monitoring

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