Open cooling water system of gas-fired thermal power plant and its start-stop control method

Abstract

The invention provides an open cooling water system of a gas-fired thermal power plant and its start-stop control method. The start-stop control method includes: an initialization start step, a unit selection step, a commissioning start step and a system stop step; in the initialization start step Before, it is necessary to run any circulating water pump and whether the pressure of the circulating water outlet main pipe is less than the predetermined value and whether the open cooling water pump is pre-selected. Before the system stop step, it is necessary to judge whether the open cooling water pumps are all stopped and whether the water ring vacuum pumps are all stopped. Through the present invention, the automatic start-up of the open-type cooling water system can be realized when the open-type cooling water system is fully stopped or partially started, without disturbing the original operating state when the part is started; Automatic stop of cooling water system.

Description

technical field [0001] The invention relates to the cooling water technology of a gas-fired thermal power plant, in particular to an open cooling water system (open cooling water system) of a gas-fired thermal power plant and a start-stop control method thereof. Background technique [0002] The open-type cooling water of gas-fired thermal power plants is taken from the condenser circulating cooling water system, which is suitable for providing cooling water sources for equipment and closed-loop cooling water heat exchangers with large water consumption and circulating cooling water quality that can meet the requirements. [0003] The existing open cooling water system cannot realize the automatic start-up under the full-stop state of the open-type cooling water system of the gas-fired thermal power plant and the automatic stop under the running state. It is impossible to realize the automatic start-up of the open-type cooling water system of the gas-fired thermal power plan...

AI Technical Summary

Problems solved by technology

[0003] The existing open-type cooling water system cannot realize the automatic start-up and automatic stop under the running state of the open-type cooling water system of the gas-fired thermal power plant.

It is impossible to realize the automatic start-up of the open-type cooling water system of the gas-fired thermal power plant in a partial start-up state, and it will interfere with the original operation state

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