SU1153178A1 - Thermal deaerator - Google Patents

Abstract

THERMAL DEAERATOR, which contains jet and bubbler plates installed in the body of the column, the latter of which has a hydraulic lock built in the form of a pipe installed in the sump with an outlet in the upper part, and a water channel formed by a vertical partition adjacent to the bubble plate and a partition and body characterized in that, in order to increase the reliability of operation by increasing the hydrodynamic stability, the hydraulic lock is placed diametrically opposite to the overflow channel, ue latter thus is 1 / 5-1 / 4 column section, and the outlet pipe opening is formed by the drain channel and having a cross section equal to the cross section of the nozzle.

Description

The invention relates to a power system, in particular to thermal deaerators, and can be applied in thermal power plants and in industrial heating boilers for heating water and removing corrosive gases from it.

The purpose of the invention is to increase the reliability of operation by increasing the hydrodynamic stability.

FIG. 1 schematically shows the proposed thermal deaerator, a longitudinal section; in fig. 2 - the same cross section.

The thermal deaerator contains columns installed in the housing. 1 jet plates 2 and 3 and a bubbling plate 4, the latter of which has a water seal built in the form of a branch pipe 6 installed in a pallet 5 with an outlet 7 in its upper part, and a overflow channel formed by a vertical partition 8 adjacent to the bubble plate 4 and the case of the column 1. The hydraulic lock is located diametrically opposite to the overflow channel, the cross section of the latter is 1/5 to 1/4 of the cross section of column 1, and the outlet 7 of nozzle 6 is made on the side of the drain channel and has a cross section The cross section of the pipe 6. The deaerator also contains a storage tank 9, on which it is installed, column 1. Column I is equipped with a fitting 10 for supplying some type of water flow, a water distribution device 11, a collector 12 for supplying boiling water flow installed between jet plates 2 and 3 with a baffle shield 13. The column in the upper part is equipped with a nozzle 14 for withdrawing non-condensable gases, and in the lower part with a nozzle 15 draining water into the accumulator tank 9.

Thermal deaerator works as follows.

Skimmed deaerated water flows through fitting 10 into the water distribution

The device 11, the flow temperature is equalized, after which the water enters the jet tray 2, from where it is streamed to the jet tray 3, onto which a stream of boiling water is supplied through the collector 12. Here the flows of boiling and non-boiling water are moved and are discharged as jets onto the bubble plate 4, and then the stream of water that has passed through the bubble plate 4 is discharged into the storage tank 9. At the same time, the outflow rate of water in any mode of the deaerator does not exceed 0.12 m / s, and the cross section of the overflow channel is 1 / 5-1 / 4 of the cross section of column 1, which ensures laminar flow of water

with a bubble plate 4 and the hydraulic stability of the latter. Heating steam from the accumulator tank 9 enters the bubble plate 4, where, interacting with the water flow, it forms a highly turbulent bubbling layer, in which the additional heating of water and the main removal of free carbon dioxide takes place. Further, the steam and gases released during the deaeration process come under the jet plate 3 and, condensing into the water jets, ensure its heating

and deaeration. In the same way, heating and de-aeration of water that is drained from the jet tray 2 takes place. Non-condensable gases are removed from column 1 through nozzle 14. Rob shield 13 prevents the dripping of moisture. With an increase in heat load and steam consumption, the vapor pressure under the bubble plate 4 increases. When its value exceeds the allowable one, excess steam breaks through the hydraulic lock formed by the tray 5 and the pipe

5 6, and through the latter passes under the jet tray 3. Due to the fact that the hydraulic lock is diametrically opposite to the overflow channel, steam exits hole 7, crosses the jets twice in the transverse direction, which maximally develops the surface of the contact phase and intensifies the steam condensation .

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Claims (1)

A THERMAL DEAERATOR containing inkjet belts and bubbler plates in a half-mounted column housing, the last of which has a water trap made in the form of a nozzle installed in the tray with an outlet in the upper part, and a spillway formed by a vertical partition adjacent to the bubbler plate and the housing , characterized in that, in order to increase the reliability of the work by increasing the hydrodynamic stability, the water seal is placed diametrically opposite to the spillway, the cross section along the latter in this case is 1 / 5-1 / 4 of the column section, and the outlet of the nozzle is made from the side of the spillway and has a section equal to the cross section of the nozzle. g FIG. 1