Inlet steam control system and supplementary steam control method of dual-cylinder dual-pressure waste heat generator set

Abstract

The invention relates to the field of steam intake control of a generator set, in particular to a steam intake control system of a dual-cylinder dual-pressure waste heat generator set and a supplementary steam control method thereof. The main steam regulating unit includes a medium pressure header, a first quick cut valve and a first regulating valve, the air outlet of the medium pressure header is connected to the first quick shut valve, and the first regulating valve is respectively connected to the first quick shut valve and the medium pressure cylinder of the generator set; the supplementary steam adjustment unit includes a steam-water separator, a heater, a second quick-cut valve and a second regulating valve, and the air inlet of the heater is respectively connected with the air outlet of the steam-water separator and the medium pressure collector. The air outlet of the box is connected, the air outlet of the heater is connected with the second quick-cut valve, and the second regulating valve is connected with the low-pressure cylinder of the generator set and the second quick-cut valve; the first quick-cut valve, the second quick-cut valve, Both the first regulating valve and the second regulating valve are connected with the DEH control module. The invention is suitable for the steam inlet control of the generator set.

Description

technical field [0001] The invention relates to the field of steam intake control of a generator set, in particular to a steam intake control system of a dual-cylinder dual-pressure waste heat generator set and a steam supplementary control method thereof. Background technique [0002] Turbine generator refers to a generator driven by a steam turbine, which is a rotary power machine that converts the energy of steam into mechanical work. generate electricity. [0003] Saturated steam itself cannot be directly used as steam for steam turbine power generation because of factors such as water content, low pressure and no power, and the hardness of water vapor easily causes steam turbine blades to scale. of. Compared with the thermal efficiency of steam work, the generator set consumes high-pressure high-temperature or medium-pressure medium-temperature steam. For a long time, the utilization of industrial low-pressure steam can only be recycled and reused from the perspective...

AI Technical Summary

Problems solved by technology

[0005] ⑴Defects of low-pressure steam power generation

[0007] When directly using saturated steam, especially staged steam sources, for unit steam supplementation to generate electricity, in order to ensure the stability of unit power output, the saturated steam supplementary steam flow should not exceed one-third of the total flow, and at the same time, the low-pressure saturated steam will make the last stage blades of the steam turbine Serious water erosion seriously limits the power generation efficiency and service life of the unit

[0008] ⑵ There is no DEH function control model of dual-pressure steam-admission generator set

This control mode cannot achieve the purpose of stable, safe, efficient use of low-pressure steam and high automation level

Therefore, the automatic control method of large flow and impact low-pressure steam admission is still a blank area at present.

[0011] (3) Dual-pressure control function requirements are complex and control requirements are high

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