Water feed flow control and pressure compensating system of boiler

Abstract

The invention provides a system for controlling water supply flow for a boiler and compensating pressure, which comprises the boiler, a boiler water supply pump and a water supply pipe, and also comprises a prefix flow control pump, a revolution driver for flow control, and a flow control and pressure compensation adjuster. The revolution driver is electrically connected with a driving motor of the prefix flow control pump and the flow control and pressure compensation adjuster respectively. The flow control and pressure compensation adjuster monitors adjusting parameters of the boiler water supply pump, and changes the flow of the prefix flow control pump through changing the revolution of the revolution driver to further change pump lift variation of the prefix flow control pump, thereby achieving flow control and pressure compensation for the boiler water supply pump. A water injection pump in the prior art deviates from an efficient area, has reduced efficiency, pollutes electric network, only can be adjusted in a single direction, can not ensure stable water supply pressure, and has huge investment. The system can achieve infinitely variable adjustment for water supply amount, and has the advantages of stable water supply pressure, low power consumption, and improved efficiency.

Description

technical field [0001] The invention relates to a boiler feedwater system of a power plant, in particular to a feedwater flow control and pressure stabilization system of the boiler feedwater system. Background technique [0002] The boiler feed water pump is the key equipment for the safe and continuous operation of the steam boiler in the power plant. At present, in order to ensure the stable operation of the system, a considerable margin is left in the design of the feed water pump of the power plant, and the steam boiler of the power plant is developing to a large capacity, with large steam displacement, high temperature and high pressure, so the power consumption of the boiler feed water system is relatively high. big. Especially when the load of power supply, heat supply and other devices (such as steam turbine) changes or the environment changes (such as winter and summer, day and night), the steam flow and pressure also change accordingly. The usual way to deal wit...

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Problems solved by technology

As a result of this approach, the water injection pump will deviate from the high-efficiency zone, the efficiency will be reduced, and the power grid will be polluted. Moreover, it can only be adjusted in one direction, which cannot ensure the stability of the water supply pressure, and the investment is huge.

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