Power island arrangement structure of one-on-one multi-shaft gas turbine extraction condensing back-pressure turbine combined cycle power plant

Abstract

The invention discloses a power island arrangement structure of a one-on-one multi-shaft gas turbine extraction condensing back-pressure turbine combined cycle power plant. The power island arrangement structure comprises two gas turbines which are linearly arranged outdoors in the open air, wherein two waste heat boilers are arranged in a mirror symmetry manner; a steam turbine is arranged in a steam engine room, and the center line of the steam turbine is parallel to the center line of the gas turbines; the steam engine room is an unequal column space combined factory building; a back-pressure turbine side plant has the column space of 5m, 8m and 5m; a plant intermediate layer and an operating floor have the elevation of 3.9m and 7.9m respectively; an overhauling span is not needed, the back-pressure turbine and extraction condensing turbine are respectively and independently provided with independent access holes of 4.91m*9m and 6.15*9m; two travelling cranes of 32t / 5t and 75t / 20t are correspondingly configured; lower chord elevation of the plant is 22.73m; a main plant PC and MCC are respectively arranged on a condenser floor and an intermediate layer; a generator outgoing line is arranged on a 3.9m layer; the installation of a main transformer and a standby transformer of a steam turbine set arranged outside the column A can be canceled, and a centralized control building and an electric room are arranged.

Description

technical field [0001] The present invention relates to a "one-to-one" multi-shaft gas turbine-extraction condensate back pressure unit combined cycle power island layout structure, especially a "one-to-one" multi-shaft gas turbine using Alstom GT13E2 gas turbine Shaft-combustion turbine-extraction condensate back pressure unit combined cycle power island layout scheme belongs to thermal power plant design technical field. Background technique [0002] Steam turbines used in domestic gas turbine combined cycle power plants generally include two main forms, namely back pressure units and extraction condensing units. The back pressure unit has a high heat-to-electricity ratio and thermal efficiency, and is an ideal form of heating unit, but its heat supply is easily limited by downstream users; the operation mode of the extraction condensing unit is relatively flexible, and the heating parameters are high, especially suitable for Industrial steam users. [0003] The layout o...

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Problems solved by technology

[0005] 1. The gas turbine is arranged indoors, and the combination form of the main engine module is not substantially different from that of the outdoor open-air arrangement, but the outdoor open-air arrangement needs to consider additional environmental protection requirements;

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