A power island layout structure of a combined cycle power plant with one dragging one multi-shaft gas turbine extraction condensing back pressure unit

Abstract

A power island layout structure of a combined cycle power plant with a one-to-one multi-shaft gas turbine extraction-condensation back-pressure unit includes: two gas turbines are arranged in an outdoor open air, two waste heat boilers are arranged in a mirror-symmetrical arrangement, and a steam turbine is arranged in a steam engine room Indoor and the center line of the steam turbine and the center line of the gas turbine are kept parallel; the steam turbine room adopts a combined workshop with unequal column spacing, and the column spacing of the workshop at the side of the back pressure unit is 5 meters, 8 meters, and 5 meters; They are 3.9 meters and 7.9 meters respectively; the maintenance span is cancelled, the back pressure unit and the condensation extraction unit are respectively set with independent manholes of 4.91 × 9 meters and 6.15 × 9 meters, correspondingly equipped with two 32t / 5t and 75t / 20t vehicles. The lower chord elevation of the powerhouse is 22.73m; the PC and MCC of the main powerhouse are arranged on the 0m floor and the middle floor respectively, and the generator outlet is set on the 3.9m floor. electrical room.

Description

technical field [0001] The invention relates to a layout structure of a power island of a combined cycle power plant with a one-to-one multi-shaft gas turbine extraction and back pressure unit, especially a one-to-one multi-shaft gas turbine extraction and condensate back using an Alstom GT13E2 gas turbine The invention relates to a layout scheme of a power island of a compressor unit combined cycle power plant, belonging to the technical field of thermal power plant design. Background technique [0002] Steam turbines used in domestic gas turbine combined cycle power plants generally include two main types, 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 suitabl...

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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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