Mercury-containing fumes emission continuous monitoring system and monitoring method thereof

Abstract

The invention relates to a mercury-containing fumes emission continuous monitoring system and a monitoring method thereof. The monitoring system comprises a sampling device, a reactor, a gas and water separating device, and a mercury concentration measuring device which are sequentially connected through a pipeline; the reactor is connected with a first container containing a divalent mercury adsorption solution through a first peristaltic pump, and is also connected with a second container containing a divalent mercury reduction solution through a second peristaltic pump; and the sampling device, the first peristaltic pump, the second peristaltic pump and the mercury measuring device are separately electrically connected with a control circuit. The monitoring method comprises: firstly, the divalent mercury adsorption solution is pumped into the reactor to adsorb the divalent mercury in the fumes, and the mercury concentration measuring device is used to measure the concentration of zero valent mercury in the fumes; secondly, the divalent mercury reduction solution is pumped into the reactor to reduce the divalent mercury to be zero valent mercury, and the concentration obtained by the mercury measuring device at the same time is the concentration of the mercury in the fumes. The monitoring system of the invention is simple in structure, can prevent environment pollution, is highly reliable, achieves on-line automatic continuous monitoring, and improves operation efficiency and measurement accuracy.

Description

technical field [0001] The invention relates to a measurement system for mercury content in flue gas, in particular to a continuous monitoring system and monitoring method for flue gas form mercury emission with convenient testing, high reliability and environmental protection. Background technique [0002] Mercury, especially methylmercury, is extremely toxic, causing great harm to humans and animals, and causing irreversible damage to the nervous system. Zero-valent mercury stays in the atmosphere for as long as 0.5 to 2 years, and can also migrate long distances in the atmosphere, causing global mercury pollution. [0003] Coal is the main energy source in our country, and the annual consumption of coal is huge. The form of mercury in flue gas emitted after coal combustion is mainly in the form of gaseous divalent mercury and gaseous zerovalent mercury. The various forms of mercury have unique physicochemical properties and, therefore, differ in their emission, transpor...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the technical problems of the original flue gas mercury emission concentration measurement system, which are complex in structure, prone to leakage, and low in reliability; it provides a continuous monitoring system of flue gas mercury emission, which has a simple structure, is not easy to leak, and improves monitoring efficiency. reliability

[0006] The present invention simultaneously solves the technical problems that a large number of samples need to be collected in the original flue gas mercury emission concentration measurement method, the testing process can only be performed manually, cannot be automatically and continuously monitored online, and the work efficiency is low, which also affects the measurement accuracy; it provides a flue gas Form mercury emission continuous monitoring system and its monitoring method, the sample collection amount is small, the collection and testing process is fully automated, and the online automatic continuous monitoring of flue gas mercury emission concentration is realized, the work efficiency is high, and the measurement accuracy is also improved

[0007] The present invention also solves the technical problem that the original measurement method of flue gas mercury emission needs to consume a large amount of toxic, harmful and highly corrosive chemical reagents, pollutes the environment, and has high cost; provides a continuous monitoring system for flue gas mercury emission and its monitoring method, it only needs to use a small amount of chemical reagents, and the chemical reagents used are non-toxic and harmless, which will not pollute the environment and reduce costs

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