WATER THERMAL DEAERATION METHOD FOR DEAERATOR OF BOILER AGGREGATE AND APPARATUS FOR PERFORMING THE SAME Russian patent published in 2006 - IPC F22D1/50 

FIELD: water deaeration systems, possibly in boiler units.

SUBSTANCE: initial water is fed to deaerating column of deaerator and steam is fed to bubbling device. Accumulator tank is divided by means of partition to sections for variable water level and constant water level. Section with variable water level is bubbled with steam. Steam-air mixture is passed over surface of media interface at counter-current with water at first in section with variable water level and then in section with constant water level. Steam-air mixture is passed in deaeration column. Evaporated residue is removed in outer and inner end portions of sections respectively with constant and variable water levels for further feeding it under water level in hydraulic gate cavity. Some part of initial water is fed to cavity of hydraulic gate and excess of water is supplied to section with constant water level. Evaporated residue is discharged from cavity of hydraulic gate. Inlet openings of pipelines for discharging evaporated residue out of sections are raised over water level by 20-30 mm. Inlet end portion of pipeline for discharging residue of section with variable water level is secured to float. Upper end portion of pipeline for discharging evaporated residue in section with variable water level is communicated with rising branch pipe through flexible adapter. Lower end portion of descending branch pipe of elbow of hydraulic gate is arranged in hydraulic gate cavity having branch pipes for supplying initial water, for discharging evaporated residue and pipeline for water overflow into section with constant water level. Edge of upper end portion of water overflow pipeline is raised by 20 -30 mm over edge of lower end portion of descending branch pipe of elbow of hydraulic gate. Deaeration column has vertical walls in the form of rectangle in plan view; upper ends of said walls are spaced from lid of column and lower ends of said walls are raised by 100 - 200 mm over section with constant water level.

EFFECT: possibility for receiving high-quality deaerated water providing improved operational reliability of boiler aggregate.

2 cl, 2 dwg