SU1643869A1 - Method of vacuum deaeration of liquid and deaerator for effecting the same - Google Patents

Abstract

The invention relates to a power system and industrial heat engineering and m, 6. used for heating and deaerating water in TZN schemes and heat networks. The purpose of the invention is to increase the efficiency of heat and mass transfer. In the housing 1 of the deaerator, there is a water distributor 2 and a bubbler device, made in the form of perforated trapezoidal chambers 4 mounted on the sheet 3 and mounted on the sheet along the cylindrical chambers 5. The upper surfaces of chambers 4 and 5 are adjacent the partitions 6, and the partitions 6 on the chambers 5 have a great height. The water that enters sheet 3 passes between chambers 4 and 5 and is treated with steam. phase, coming from the latter from two sides of the moving stream of water. Such a bubbling organization can increase the intensity of heat and mass transfer. 2 pp fly, 1 ill. O t 00 Och O Yu

Description

The invention relates to a power system and industrial heat engineering and can be used to preheat water deaeration in heat and power plants and heat networks.

The aim of the invention is to increase the intensity of heat and mass transfer.

The drawing shows a vacuum deaerator on which the proposed method is carried out.

It contains ps, a water distributor 2 located in the housing 1 and a bubbling device in the form of 3 trapezoidal chambers 4 and chambers 5 (semi-cylindrical) installed on the sheet, mounted above the sheet 3. Chambers 4 and 5 have perforations and communicate with the heating supply pipe ( not shown in the drawing). Vertical partitions b are adjoined to the upper surfaces of chambers 4 and 5, and the partitions on semi-cylindrical chambers 5 have a greater height. The casing 1 is connected to the inlet 7 and outlet 8 of the deaerated water outlet and the outlet 9 of the outlet drain. Chambers 4 and 5 form channels 10 for the passage of water.

The method is implemented as follows.

The water to be deaerated through the nozzle 7 enters the water distributor 2, from where it is poured into the initial part of the sheet 3. When the jets of water interact with the steam, it is preheated. Having arrived at the initial part of the sheet 3, the water moves further along channels 10 formed by chambers 4 m 5. Partitions 6 ensure the movement of all water through the channels indicated. The heating medium (steam or overheated water) is supplied to the inside of the evaporation chambers 4 and 5, and through their perforation it is bubbled through a layer of moving water. The vapor phase entering the water layer organizes a layer in the zone of the bubbling device by means of a turbuliated foam movement with high mass transfer characteristics. Bilateral stock of the vapor phase allows to increase the rate of energy dissipation per unit mass of the liquid and to provide a paraglide of the liquid in the space between the 4 m 5 chambers.

Above chambers 4 and 5 between partitions 6 there is no effect of the vapor flow, rapid destruction of dynamic foam and separation of liquid and gas occur.

phases. This process is repeated sequentially as the liquid moves, which allows to intensify the process of heat and mass transfer.

After passing the processed

From the spraying device, it is discharged into the lower part of the body and is discharged through the pipe 8, the water-soluble gases, passing through the water jet, are freed from non-condensable vapor and

removed through manifold 7.

Claims (2)

1. A method of vacuum deaeration of a liquid by the way of splitting it into jets, heating them, and then organizing the movement liquids in the layer with a simultaneous injection of the vapor phase into it, which differs from the fact that, with the aim of increasing the intensity of heat and mass transfer, the liquid layer moves along a trajectory close to sinusoidal, and the vapor phase is introduced on both sides of the layer. 2. A vacuum deaerator containing a water distributor and a bubbling device arranged in the housing along the trapezoidal evaporation chambers installed on a sheet, communicated with a supply pipe of the heating medium, also supply and exhaust connections deaerated water and vapor discharge, characterized in that, in order to increase the intensity of heat and mass transfer, the barometric device is equipped with trapezoidal chambers with additional chambers having a cross section in the form of a half circle, ml; the drift surface is perforated and facing the sheet, as well as vertical partitions adjacent to the upper surfaces of the chambers, and the partitions adjacent to additional chambers have a greater height than partitions adjacent to trapezoidal chambers.