System and method for continuously monitoring mercury concentration in oxygen-enriched device

Abstract

The invention belongs to the field of mercury content detection in flue gas, and particularly relates to a system and method for continuously monitoring the mercury concentration in an oxygen-enricheddevice. The system mainly comprises a flow control device, two reaction bottles connected in series, a drying device, and an analysis and test system which are sequentially connected to an oxygen-enriched flue pipe by a specially-made pipeline. The reaction bottles are placed in a container containing an ice water mixture and equipped with a reaction liquid automatic update device consisting of aperistaltic pump with flow regulation capability and a liquid storage bottle. The drying device is a semiconductor condenser that can continuously remove water vapor in the flue gas. The system and method can realize the real-time updating of the reaction liquid and the continuous removal of the water vapor, so that the test process of the mercury concentration of the circulating flue gas in theoxygen-enriched combustion device is continuous and convenient, and the validity and the repeatability of the test data can be guaranteed. Therefore, the system and method can provide a guiding basisfor the mercury removal technicians and has a certain industrial value.

Description

technical field [0001] The invention belongs to the field of mercury content detection in flue gas, in particular to a system and method for continuously monitoring mercury concentration in an oxygen-enriching device. Background technique [0002] my country is the world's largest coal producer, consumer and importer, and uses coal as the main energy source. For a long period of time in the future, it is still difficult to change the status of coal as the main energy source in my country, and the total demand for coal is on the rise. The CO emitted by burning coal 2 It is one of the main culprits of the greenhouse effect. Therefore, new coal-fired CO 2 Control technology needs to be developed urgently. [0003] Oxyfuel combustion technology is one of the most promising technologies for large-scale carbon emission reduction of coal-fired power plants, and it is a cost-effective carbon dioxide capture technology. Moreover, under the current technical conditions, oxyfuel c...

AI Technical Summary

Problems solved by technology

First, the reaction solution cannot be updated in real time, and it cannot be guaranteed that the entire test system is always in the best state of the test

The concentration of acid gas in the oxygen-enriched atmosphere is high. If the reaction solution is not updated in time, it will affect the test data at least, causing the test results to lose repeatability and fluctuate greatly, and the measurement accuracy and data validity cannot be guaranteed; at worst, the corrosion test instrument has high sensitivity. components, resulting in the scrapping of the entire mercury analyzer

Second, the conventional test system uses a desiccant tube as the drying device. However, the water vapor content in the oxygen-enriched atmosphere is high. If the drying effect is to be guaranteed to meet the standard test environment requirements, the desiccant must be replaced frequently, which will make the test The process is cumbersome and the continuity of the testing process cannot be guaranteed

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