SU1421703A1 - Vacuum deaerator - Google Patents

Abstract

Invention m. used in thermal power plants, industrial heating cable and heat networks for heating and deaeration of feed and feed water. The purpose of the invention is to increase the efficiency of deaeration. The side wall 5 is installed obliquely with the formation of an obtuse angle with a horizontal partition 4, moreover, the wall and the retaining threshold 6 are perforated. This embodiment allows a process of smooth self-regulation of the transfer of excess steam through the drain space to the jet stage and the removal of a part of the non-evaporated liquid from the evaporation chamber. As a result, pressure stabilization in the chamber is accelerated, which provides greater hydrodynamic stability in the bubbling stage. When evaporated in the streams of superheated water from the evaporation chamber in relation to the pressure, an additional amount of steam is formed in the volume of the deaerator, which participates in the heat and mass transfer of the jet stage. 1 il. €

Description

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The invention relates to heat and power engineering and industrial heating equipment and can be used in thermal power plants, industrial heating cable and heat networks for heating and deaerating feed and make-up water.

The aim of the invention is to increase the efficiency of deaeration.

The drawing schematically shows a deaerator, a cross-section.

Deaerator contains located

8 cylindrical housing water dispenser 1, evaporation chamber 2 formed by the housing wall, bubbling sheet 3, horizontal partition 4 and side wall 5 located in the same plane c) forage threshold 6 of bubbling fox:; one and, moreover, branch pipes for sub: yes deaerated and superheated water 7

| and 8, removal of non-condensable gases

9 and deaerated water 10. The wall 5 is installed obliquely, forms an obtuse angle with the partition 4 and is perforated. Perforated also made retaining threshold 6.

The deaerator works as follows.

The water to be deaerated is supplied through the nozzle 7 to the water distributor 1, from where it is jetted to the initial part of the bubbling sheet 3. When heated in jets to a temperature close to the saturation temperature, the water, after intense deaeration on the bubbling sheet, is drained through the holes in the retaining threshold 6 , With the increase in load, as a result of the commissioning of a greater number of glistening holes in the retaining threshold, the surface of the contact of the phases of the liquid rises, pouring down the jets through the actively ventilated zone to the deaerate ora From the bottom, water is discharged through the nozzle 10.

Overheated water through the pipe 8 is fed into the evaporation chamber 2, from which the main amount of the formed steam enters through the spraying sheet 3 into the layer of water subjected to de-aeration. The excessive amount of steam through the perforation of the inclined side wall 5 of the evaporation chamber 2 is bypassed to the zone of water discharge from the bubbling sheet, as a result of which active ventilation of this zone is organized, facilitating removal

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the residual amount of dispersed gases. Through the perforations of the side wall 5, a part of the non-evaporated liquid is removed from the chamber. Moreover, depending on the fluctuations of the load, when the height of the steam pillow changes, the number of openings for liquid drainage and excess amount of steam automatically changes, which leads to a smooth control and acceleration of pressure stabilization in the evaporation chamber, which ensures greater hydrodynamic stability of the bubbling stage. In addition, the water draining from chamber 2, entering the zone of reduced pressure, is subjected to additional partial evaporation. The resulting steam participates together with the steam transferred from the evaporation chamber 2, both in the ventilation of the drainage space and in the ventilation of the space above the bubbler sheet 3. The additional ventilating steam flow participates in the heat and mass transfer of the jet stage, which also increases energy efficiency of the deaerator. The non-condensed gases are discharged from the deaerator through the pipe 9.

The proposed technical solution allows a process of smooth self-regulation of the transfer of excess steam through the drain space to the jet stage and removal of a part of the non-evaporated liquid from the evaporation chamber. As a result, pressure stabilization in the chamber is accelerated, which ensures greater hydrodynamic stability of the bubbling stage. When evaporated in the streams of the water removed from the evaporation chamber overheated in relation to the pressure in the water deaerator volume, an additional amount of steam is produced, which participates in the heat and mass transfer of the jet stage.

Thus, the efficiency of the deaeration process is increased.

Claims (1)

Invention Formula Vacuum deaerator containing the jet compartment located in the housing and the evaporation chamber formed by the housing wall, a bubbling sheet with a retaining threshold, horizon 1421703 the partition wall and the side wall are set obliquely with an angle located in the same plane with a horizontal partition with a retaining threshold, which has an obtuse angle, and the lateral wall is made with the purpose of raising the retaining threshold and retaining threshold perforation of de-aeration efficiency, lateral.