Wet flue gas desulphurization mist eliminator differential pressure measurer for thermal power generation factory

Abstract

The invention discloses a wet flue gas desulphurization mist eliminator differential pressure measurer for a thermal power generation factory. The measurer comprises a differential pressure transmitter, a desulphurization mist eliminator and a blowing device, wherein the desulphurization mist eliminator is mounted between a flue inlet and a flue outlet, a low voltage side of the differential pressure transmitter is connected in front of the desulphurization mist eliminator through a sampling pipe, a high voltage side of the differential pressure transmitter is connected at the back of the desulphurization mist eliminator through a sampling pipe, and a first blowing valve, a second blowing valve, a PLC, and a first protection valve and a second protection valve which are connected with the PLC are further comprised. According to the measurer, the first protection valve, the second protection valve, the first blowing valve and the second blowing valve are utilized in combination with the PLC, compressed gas sent out by the blowing devices can blow the sampling pipes regularly, a congestion problem caused during differential pressure measurement on the mist eliminator can be effectively solved, maintenance cost is greatly saved, a differential pressure value of the desulphurization mist eliminator can further be accurately and stably detected, and the measurer further has advantages of simple structure, more convenient maintenance and strong practicality.

Description

Technical field [0001] The invention relates to a differential pressure measurement system, in particular to a differential pressure measurement system for a wet flue gas desulfurization demister in a thermal power plant. Background technique [0002] In the operation of the wet flue gas desulfurization system of thermal power plants, the blockage of the desulfurization and demister will directly affect the operation of the entire system. If the desulfurization defogger is blocked, it will not only make the defogging effect poor, the flue gas carries a lot of droplets, the desulfurization parameters do not meet the standards required by the Environmental Protection Agency, and cause secondary pollution to the environment, but also the system energy consumption will increase. , Which affects economic performance, and even the safe and stable operation of FGD. Therefore, the differential pressure of the desulfurization and demister must be accurately measured in real time. Howeve...

AI Technical Summary

Problems solved by technology

However, because the flue gas at the sampling port on the high-pressure side of the differential pressure of the demister demister carries a large amount of water droplets, gypsum, dust and other mixtures, it is easy to cause blockage of the differential pressure sampling port of the demister demister, resulting in deviations in sampling data, making the demister The fogger cannot be descaled in time, which leads to a series of serious problems such as poor demisting effect, excessive smoke emission, and affecting the safe and effective operation of FGD.

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