Once-through furnace high-energy water recovery system

Abstract

The invention discloses a once-through furnace high-energy water recovery system. An outlet of a water storage tank of a boiler starting separator communicates with an inlet of a high-energy water temperature reducing device through a high-energy water pressure reducing valve, an outlet of the high-energy water temperature reducing device communicates with an inlet of a deaerator through a recovered working medium thermocouple, and an outlet of the deaerator communicates with a boiler through a deaerator water outlet thermocouple, a water feeding pump and a first high-pressure heater; an outlet of a condensed water pipeline is divided into two paths, one path communicates with the inlet of the deaerator through a second high-pressure heater, and the other path communicates with an inlet ofa temperature reducing water spray head in the high-energy water temperature reducing device through a temperature reducing water regulating valve in sequence; and an auxiliary steam pipeline communicates with a steam inlet of the deaerator. By means of the system, high-energy water can be recycled, and the economical efficiency in the process of converting deep peak regulation into wet operationand starting of the unit is improved.

Description

technical field [0001] The invention belongs to the field of heat supply and energy saving of thermal power generation equipment, and relates to a high-energy water recovery system for a DC furnace. Background technique [0002] In order to accelerate the innovation of energy technology, tap the peak-shaving potential of coal-fired units, improve the operation flexibility of thermal power units, comprehensively improve the system’s peak-shaving and new energy consumption capacity, and effectively alleviate the problems of abandoned wind, light and water, the 2016 National Energy The notice on the flexibility transformation of thermal power units under the Bureau has determined the demonstration units of flexibility transformation, clarified the goals of flexibility transformation, and comprehensively promoted the flexibility transformation of thermal power units. [0003] At present, affected by factors such as power peak regulation, the load rate of the unit is reduced, and...

AI Technical Summary

Problems solved by technology

Usually, this part of the start-up drainage is introduced into the expansion vessel of the body, and when the water quality is unqualified, it is directly discharged, resulting in heat-mass energy loss

When the unit operates at low load in this way, the heat consumption rate of the unit is high and the working fluid is wasted. For the consideration of economical operation, the power plant urgently needs to recycle the high-energy water discharged from this part

But so far, there has been no public report on the high-energy water recovery system that has been put into operation

In addition, although the high-energy water is of high quality, it is in a high-pressure saturated state, making it difficult to recycle.

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