Header-system connecting system based on high-pressure cylinder zero output and reheat steam and operation method

Abstract

The invention discloses a header-system connecting system based on high-pressure cylinder zero output and reheat steam. The header-system connecting system based on high-pressure cylinder zero output and reheat steam comprises conventional boilers, steam-water systems of steam turbine units and parts of additional systems, wherein the additional systems communicate reheat hot section steam and condensate water to corresponding headers respectively; when the 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 condensate 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 the method, under the operation condition of less boilers and more units, further decoupling of units and 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 high-pressure cylinder zero output and reheated steam main pipe. Background technique [0002] The continuous improvement of the installed capacity of new energy power generation systems has prompted the power grid to put forward higher requirements for the peak-shaving capability of thermal power units. In order to meet the increasingly stringent peak-shaving requirements of the power grid, a large number of thermal power units have undergone various flexible transformations. At present, the common flexible transformation of thermal power units is mainly divided into boiler stable combustion technology and unit thermoelectric decoupling technology according to the characteristics of pure condensing and heating units, as well as the heating period and non-heating period. [0003] Boiler low-load stable combustio...

AI Technical Summary

Problems solved by technology

Thermoelectric decoupling technology relies heavily on the huge heat load user demand, which has great limitations

Images