Device for measuring total concentration of multivalent mercury in coal-fired flue gas

Abstract

The invention belongs to the field of coal-fired flue gas mercury content measurement, and particularly relates to a device for measuring the total concentration of multivalent mercury in coal-fired flue gas. The device comprises a gas-solid separation system, a carrier gas flow control system, an oxidation-state mercury conversion system, a granular-state mercury conversion system and a mercury concentration measurement system. The gas-solid separation system is connected with the oxidation-state mercury conversion system and the granular-state mercury conversion system, the gas-solid separation system separates gas and solid in flue gas, the gas enters the oxidation-state mercury conversion system, and the solid enters the granular-state mercury conversion system. The carrier gas flow control system is connected with the granular-state mercury conversion system and is used for carrying particles and controlling the carrier gas flow to be the same as the flue gas flow. The mercury concentration measurement system is connected with the oxidation-state mercury conversion system and the granular-state mercury conversion system, and is used for measuring and recording the mercury concentrations in the two systems. According to the measuring device, the concentration of mercury in the coal-fired flue gas can be directly measured, the flue gas sampling process is omitted, the systemprocess can be simplified, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of measuring mercury content in coal-burning flue gas, and in particular relates to a device for measuring the total concentration of multivalent mercury in coal-burning flue gas. Background technique [0002] Mercury is a heavy metal element, which is toxic, can be enriched through the food chain, and can also migrate with the atmosphere. These characteristics increase the harm of mercury to the natural environment and human life and health. Mercury pollution in the atmosphere is mainly caused by human beings, and coal combustion is the main source of human-made mercury pollution. Although China has made great breakthroughs in new energy power generation technology, for a relatively long time in the future, China's energy structure will be dominated by coal. Therefore, China's mercury pollution problem should be taken seriously, and China has also formulated a series of emission standards to limit the emission conce...

AI Technical Summary

Problems solved by technology

[0003] Mercury in coal-fired flue gas mainly exists in three forms: oxidized mercury, particulate mercury, and elemental mercury. The problem with current measurement technology is that it cannot directly measure the mercury concentration in coal-fired flue gas. Mercury concentration methods include OHM and 30B methods. These methods require sampling before continuing to measure. The process is relatively complicated, and they all require sampling after the particle treatment device

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