SU547390A1 - Thermal Deaerator - Google Patents

Description

one

The invention relates to the field of power engineering, in particular to thermal deaerators designed to remove corrosive gases from the feedwater of steam boilers.

Thermal deaerators are known, containing a tank-accumulator and a de-aeration box with a jet trap and a bubble stage located in it.

Such a structure provides a stable deaeration of water when working with hydraulic loads of 30-120% of the nominal capacity.

For block unit deaerators, capacity can be 10% of 15 nominal. This creates great difficulties in ensuring efficient work1. (Such deaerators, in particular bubbling devices.

Also known is a thermal deaerator containing perforated plates and jetting perforated plates installed in the column, under the latter of which is placed the steam line 2.25

The deaerator has a steam bypass device in the form of a hydraulic shutter, flooded with water at low hydraulic loads of the deaerator, and the pallet is hydro-. the shutter is placed under a bubbling plate.

When the heat load is changed (and, consequently, the steam consumption), the speed of the steam in the holes of the barging plate changes. At maximum or maximum speed, this speed is significantly different from the optimal one (up or down), which provides the most efficient use of bubbling for de-aeration. At the same time, there is a significant increase in the resistance of the bubbling device (with the danger of flooding and hydraulic shocks) or a decrease (up to the onset of a failed operating mode), which ultimately affects the efficiency of the device and the deaerator as a whole.

Claims (2)

The aim of the invention is to increase the efficiency of deaeration when loading changes within wide limits, in particular when operating the de-aerator under gliding pressure. This is an LOD: it is bent by the fact that the partitions adjacent to the bubble plate are located in the box, the height of which is increased in the course of the steam. The height of the partitions is increased in the direction of vapor movement under the sheet according to the following relationship: And ,, h ,, n. (0.8-J, 2) h where hj is the height of the first (along the steam) burnout; n is the number of the partition; (Ij.j s height and septum. Deaer drawing shows thermal torus obnish yid. 1er.shchesgshy deaerator comprises from about-ustptyuElotp1 on byke -akkumul torus 2 column portions Deaeratslonnoy The column is a bubble tareshsa 3 tsolievymi zo-iami perforations 4, 5, 6, limited by the lack of nepcropofKaivjn 7, npia-EbmaraffliiMH to the barbers; parts of column 1 are placed at the front plate 10 is combined with a mixing device. The cold condensate enters column 1 through fitting 11 and first enters sm-distribution device 12. and then onto plate 10. From tray 10, water is jetted off to discharge plate 13 and then to below the bubble plate 3. In the jet compartment, the water is heated to a temperature close to the saturation temperature and the pre-degassing takes place. On the plate 3, the water, moving radially to the periphery, is subjected to intensive processing. steam passing through the perforation, while the water is heated to a temperature of elevation corresponding to the pressure in the de-aer torus and its deep degassing takes place. Then the deaerated water through the spillway 1 and the lock 9, which prevents the steam from passing into the bypass of the bubbling plate, is discharged into the storage tank. Steam is supplied to the deaerator through the collector 15 and falls under the bubble plate 3. At the minimum heat load, all the steam passes through the perforation zone 4. As the heat load increases, the pressure drop on the bubble sheet increases, resulting in a decrease in the water level in the box volume 8 and, that the height of the partitions 7 increases in the direction of the steam line, perforation zones 5 and 6 successively enter into operation. Simultaneously (with an increase in steam consumption, an increase in the perforation area of the bar of botajel garelki provides a better variation of the steam velocity in the holes, so that the bubbling can support the near-optimal, most intensive treatment of water and, therefore, the deaerator as a whole. With a further increase in steam consumption, its excess is bypassed in addition to the bubbling plate through the windows 16, located on the periphery of the barboles sheet.When the heat load of the deaerator is reduced, water through the windows 16 enters the box 8, the water level in it increases and the perforation zones overlap in the opposite direction ke (6,5,4). The vapor that has passed the bubbling plate first falls under the bypass plate 13 and then into the jet compartment, partially at the end -: it is removed in it and in the form of vapor is removed from the apparatus through fitting 17. In this deaerator, the effective deaeration of the feed water for various installations — vacuum, atmospheric, and elevated pressure, especially when working with variable pressures and loads. Claim 1. Thermal deaerator containing jetting and bubbling perforated containers installed in the column, under the latter of which is placed a steam conducting duct, characterized in that, in order to increase the deaeration efficiency when the load changes within wide limits, in the duct are adjoined ™ ® bubble plate partitions, the height of which increases along the steam. 2. The deaerator according to claim 1, characterized in that the height of the partitions increases according to the following relationship:., 8-J, 2) h, where: the height of the first partition; f-i is the partition number. height of the n-th partition. 7 12