Boiler circulating heating system and method for boiler water

Abstract

The invention relates to a boiler circulating heating system for boiler water. The boiler circulating heating system comprises a boiler and a steam pocket arranged above the boiler, wherein the bottom of the boiler is connected with one end of a first electrically-operated door through a pipeline; the other end of the first electrically-operated door is respectively connected with a periodic blowdown expansion tank through a first manually-operated door and is connected with a deoxidation tower through a second manually-operated door; the deoxidation tower is connected with a deoxidation water tank through a pipeline; the deoxidation water tank is connected to the steam pocket through a pipeline after sequentially passing through a third manually-operated door, a water supply pump as well as a first non-return door and a second electrically-operated door which are opposite to the water supply pump in direction; and the second electrically-operated door is automatically closed when the water supply pump jumps to stop. The invention also relates to a method for heating boiler water by using the boiler circulating heating system for boiler water. The boiler circulating heating system for boiler water can be used for increasing the temperature of the boiler water to a preset value before ignition and has the characteristics of low energy consumption, high speed and the like.

Description

technical field [0001] The invention relates to a circulating heating system for a water boiler and a heating method thereof. Background technique [0002] In recent years, energy saving and consumption reduction has become an important task for all thermal power plants. Safe and economical operation is the lifeblood of the survival and development of thermal power plants. Therefore, energy saving and consumption reduction for thermal power plants is not only reflected in the operating indicators and In terms of mode control, for peak-shaving thermal power units, the reduction of unit start-up energy consumption is also an important aspect of energy saving and consumption reduction. [0003] A thermal power plant’s grid-connected power generation has to go through several stages: start-up of auxiliary equipment, boiler water supply, boiler ignition, temperature rise and pressure increase, steam turbine running, and generator grid-connection. For a 330MW unit cold start, the ...

AI Technical Summary

Problems solved by technology

If the temperature of the furnace water and the boiler tube wall is raised to about 100°C, the cold water in the furnace must be released when the hot water enters the boiler, and the temperature of the furnace water and the tube wall is raised by flushing, so that the water consumption is very high. Large, which is not conducive to energy saving and environmental protection

[0007] When the boiler is ignited, it is necessary to start the boiler induced draft fan, blower fan, and primary fan, and also input fuel oil and coal powder, which consumes a lot of energy for startup

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