Boiler start-stop adjusting system and method for main-pipeline unit

Abstract

The invention discloses a boiler start-stop adjusting system and method for a main-pipeline unit. The boiler start-stop adjusting system comprises a high-pressure cylinder of a first boiler, a first high-pressure heater of the first boiler, a first boiler economizer, a high-pressure cylinder of a second boiler, a first high-pressure heater of the second boiler, and a second boiler economizer, which are arranged in a high-pressure cylinder water outlet system, wherein the first-stage steam extraction of the high-pressure cylinder of the first boiler is connected to the first high-pressure heater of the first boiler; outlet water of the high-pressure heater is divided into two paths, the first path is connected into a water supply system of the first boiler economizer, and the second path is connected into a water supply system of the second boiler economizer through a water outlet pipeline; the first-stage steam extraction of the high-pressure cylinder of the second boiler is connected to the first high-pressure heater of the second boiler; and outlet water of the high-pressure heater is connected into the second boiler economizer. The system and the method can effectively solve the problem of uneven heating when the second boiler of the main-pipeline unit is started and stopped, coal consumption is reduced, and the flexibility of a thermal power generating unit participating in peak regulation is improved.

Description

technical field [0001] The invention belongs to the technical field of thermal power units, and in particular relates to a system and method for regulating the start and stop of boilers of a main control unit. Background technique [0002] In recent years, the proportion of new energy power generation has increased year by year, and the operating environment of thermal power units has become more and more changeable, and will mainly participate in the operation as peak-shaving units. For most of the main control units, the form of "two boilers with one boiler" is mainly limited by the minimum stable combustion load of the boiler, which cannot further reduce the load. The loss of the boiler itself is enormous. Therefore, how to break through the technical application limitations of existing parent control units has become the focus of research at this stage. If "one furnace with two machines" can be realized and the problem of unstable startup and shutdown of the second boi...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a system and method for regulating the start and stop of boilers of the main control unit, which can effectively solve the problem of uneven heating when the second boiler of the main control unit starts and stops, and reduce coal consumption , improving the flexibility of thermal power units to participate in peak regulation

Images