A method and device for power plant booster fan auxiliary machine fault load reduction rb

Abstract

Embodiments of the present invention provide a method and device for load reduction RB when a power plant booster fan auxiliary machine fails. The method includes: triggering the booster fan RB when the unit's booster fan fails; and reducing the unit's load to The preset booster fan RB target load corresponds to the allowable output of the current operating equipment. At the same time, when the booster fan trips, the booster fan blades are fully opened to establish a flue gas flow channel to avoid unplanned outages of the unit. , to ensure the operation of the unit. By designing a new booster fan RB function, the embodiment of the present invention controls and maintains the main desulfurization equipment and the main unit equipment according to the same standards and requirements, thereby avoiding the removal of the desulfurization bypass baffle and the sealing of the flue when the booster fan fails. After the blockage has a negative impact on the operation of coal-fired generating units, we can achieve synchronized, long-term and stable operation of the desulfurization device and the boiler main engine, and greatly reduce the occurrence of unplanned outages of the unit due to booster fan failure.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and device for load shedding RB of booster fan auxiliary equipment in a power plant. Background technique [0002] With the refinement of the "Twelfth Five-Year Plan" emission reduction requirements of the Ministry of Environmental Protection, the work of reducing the total amount of pollutants will continue to be promoted. The flue bypass is completely blocked, so the plugging of the desulfurization flue bypass is imperative for each power generation company. At the same time, various documents of the Ministry of Environmental Protection and provincial environmental protection bureaus have repeatedly emphasized the deadline for blocking the desulfurization bypass of coal-fired power plants. Coal-fired power plants, as key emission reduction units, are facing direct pressure. [0003] For the wet desulfurization system with spray tower commonly used in China, th...

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Problems solved by technology

[0008] It can be seen from the above scheme that the essence of the existing domestic technical scheme is that when the booster fan is shut down due to various reasons, in order to ensure the safety of the main engine and the furnace, the boiler MFT, that is, the main fuel of the unit, is tripped directly to stop the unit.

Moreover, the air-smoke system composed of the draft fan and the booster fan after the desulfurization bypass is blocked has not been considered and designed as an integration, thus greatly increasing the number of non-stop of the unit and increasing the safety operation of the power plant and the power grid. risk

[0009] In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: since the transformation of the desulfurization bypass flue plugging carried out in 2010 has no fully mature design and implementation case thermal control optimization experience for reference, There is no corresponding technical standard, corresponding work process and normative support, and there is no long-term risk assessment; after the desulfurization transformation, it is necessary to adapt to the new operation mode, and the importance of the desulfurization system has increased sharply, and there is currently no power plant booster fan RB in this field A specific plan to avoid unplanned outage of the unit and ensure the operation of the unit

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