SU1605085A1 - Thermal deaerator - Google Patents

Abstract

The invention relates to a power system and industrial heat engineering and can be used to preheat and deaerate the feed and feed water of power plants. The purpose of the invention is to increase work efficiency. Aggressive gases with uncondensed feather and 2 particles of water blown out of the column are discharged through pipe 5 to separator 10, where they are freed from the liquid due to centrifugal force arising from movement in diffuser 13 and screw 14. Separated liquid is removed from separator through descent pipe 12, passes a lifting shaft 15, is crushed into jets in a water-crushing device 16. In the vapor volume of the tank 1, this liquid is heated to saturation temperature and is freed from the gases remaining in it. The aggressive gases and the remaining uncondensed vapor are removed from the separator 10 through the tangentially located nozzle 11. The use of the separator 10 improves the efficiency of the deaerator by increasing stability, economy and productivity. 2 hp f-ly, 1 ill.

Description

The invention relates to the field of power engineering and industrial heat engineering and can be used for heating and deaerating feedwater and feedwater of power plants.

The purpose of the invention is to increase the efficiency of the deaerator.

The drawing schematically shows a thermal deaerator.

The deaerator contains 1 deaeration column 2 installed on the accumulator tank, nozzles 3-5, respectively, supplying water, steam and exhaust vapor, placed in the jet and bubbler trays 6 and 7 of the overflow valve 8 and by-pass valve 9. Deaerator is equipped. A centrifugal separator 10, made in the form of a cylindrical vessel with a tangentially located gas outlet pipe 11. A branch pipe 5 for evacuation of steam is connected to the upper bottom of the vessel, and a downward drain pipe 12, the output section of which is located in water bemsya accumulator tank 1, inside the vessel can be installed diffuser 13 multithread screw 14, whose pitch decreases along the axis of the diffuser 13. Standpipe 12 may be positioned within the lift shaft 15 with the conductive water comminuting device 16.

The deaerator works as follows.

The deaerated water is introduced into column 2 through pipe 3 onto the jet tray 6, from where it is streamed onto the bubbling plate 7, passes along it and through the overflow hydraulic lock 8 is discharged into the tank accumulator 1. Heating steam through pipe 4 and the steam volume of the tank - the accumulator of the torus 1 is fed into the lower part of the column 2 under the plate 7, which passes through, interacts with the water on the plate 7, forms a highly turbulent bubbling layer, in which the additional cut and basic deaeration of water is carried out. Further, the steam and the released aggressive gases come under the jet plate 6, where. par. condensing on the water jets, provides its main heating and coarse deaeration, and gases with a part of the vapor and captured from the jets-water drops are discharged from the column 2 through the nozzle 5 to the separator 10. At that, the gas outlet to the mixture in the latter is released from the liquid due to the centrifugal force that occurs when moving in the diffuser 13 and the screw 14, in which there is an intense twist of the two-phase flow. The liquid separated in the separator 10 through the descending pipe 12 and the lifting shaft 15 enters the water-shaking device 16, where the water is crushed into jets and reheated to the saturation temperature. Non-condensed steam is combined with corrosive gases discharged from the separator 10 through a tangentially installed nozzle 11 into the exhaust line and atmosphere.

In the regimes of large steam and hydraulic loads, a significant amount of liquid gets into the nozzle 5 of the extraction of steam. The presence of separator 10 makes it possible to achieve a reliable separation of the two-phase mixture into components. At the same time tangential connection to the top

5 of the separator 10 of the gas outlet pipe 11 ensures reliable separation and return of the liquid, and the use of the discharge pipe 12 and the shaft 15 prevents steam from entering the storage battery 1 into the gas outlet pipe.

The combination of these distinctive features thus makes it possible to drastically reduce the entrainment of liquid, improve the ventilation of the apparatus, prevent the formation of water plugs in the evaporation line, reduce the loss of condensate and, as a result, increase the efficiency of operation. deaerator by increasing productivity, efficiency and sustainability.

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Claims (3)

1.Thermal deaerator containing a deaeration column installed on the accumulator tank, water supply pipes, steam and exhaust vapor discharge pipes, placed in the jet column and bubbling plates, water transfer hydraulic lock and bypass valve, from l. increase work efficiency 0, the deaerator is additionally equipped with a centrifugal separator, made in the form of a cylindrical vessel with a tangentially placed gas outlet pipe and connected to the bottom bottom of the lowering 5 with a drainage pipe; the outlet pipe of the evaporation outlet is connected to the upper bottom of the vessel, and the output section of the pipe is placed in the water volume of the tank. 2. Deaerator according to claim 1, dtl and h and y Hz and d- 0 so that the inside of the vessel additionally a diffuser is installed with a multi-entry screw placed inside it, the inlet cross section of the diffuser being connected to the outlet pipe of the vapors, and the pitch of the screw 5 is reduced along the axis of the diffuser. 3. Deaerator on PP. 1 and 2, that is, in order that the tank is equipped with a lifting shaft with a tinting device, and a drainage pipe, is placed inside the mine.