Header-system connecting system based on high-pressure cylinder unthreaded shaft and reheat steam and operation method

Abstract

The invention discloses a header-system connecting system based on a high-pressure cylinder unthreaded shaft and reheat steam and an operation method. The header-system connecting system based on the high-pressure cylinder unthreaded shaft and the reheat steam comprises conventional boilers, steam-water systems of steam turbine units and parts of additional systems. The additional systems communicate reheat hot section steam and condensed water to corresponding headers respectively, and meanwhile, a high-pressure cylinder rotor of a certain unit is replaced with an unthreaded shaft. When boilers of parts of units are shut down, are in hot standby or run in daily start-stop, steam turbines of the units in which the boilers are shut down can obtain reheat steam by controlling a connecting valve bank between each header and the corresponding unit, the condensed water of the units in which the boilers are shut down is recovered, and thus, the effect that the units do not stop while the boilers are shut down is achieved; and in addition, high-pressure heaters of the units in which the boilers are shut down do not work, so that more energy is saved. By adopting the method, under the operation conditions of less boilers and more units, further decoupling of the units and the boilers can be realized, and under the normal operation condition of the boilers put into operation, the output electric power rate of steam turbine generator units under the deep peak regulation operation condition is further reduced.

Description

technical field [0001] The invention belongs to the field of thermal power generation, and in particular relates to a connection system and operation method based on the optical axis of a high-pressure cylinder and a reheated steam main pipe. Background technique [0002] With global warming, the concepts and goals of "carbon peaking" and "carbon neutrality" have been proposed by various countries, and new energy power generation systems have been further valued by countries, especially the proportion of traditional coal-fired thermal power installed capacity in China. Huge countries pay more attention to the adjustment of clean strategy on the power generation side. In order to meet the increasing demand for renewable energy installed capacity and ensure the safety of power grid operation, the state guides and encourages coal-fired power units to participate in peak shaving from the policy level. [0003] In order to enable conventional thermal power units to have deep pea...

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Problems solved by technology

[0004] Among them, boiler low-load stable combustion technology is subject to boiler safety restrictions, and the minimum operating load is therefore limited; thermoelectric decoupling technology requires a large number of heat users around the power plant

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