SU1147697A1 - Deaeration unit - Google Patents

Abstract

DEAERACIOUS INSTALLATION, containing a jet de-aeration column with nozzles for supplying deaerated water and evaporating the vapor and a perforated shelf, an evaporator made in the form of a tubular heat exchanger with nozzles for supplying heating steam and draining its condensate; , in order to improve the efficiency of deaeration, the installation is equipped with a transverse grid and two vertical partitions fixed along its ends, installed in a column with the formation meters of channels with its wall and adjoining the shelf, with the partition on the side of the water inlet pipe installed with a gap relative to the shelf, the evaporator tubes are installed horizontally and placed above the storage tank, and through holes are made in the partitions, in the partition wall with a cTopowj water inlet pipe they are made above the grid, and on the other - on both sides of the latter.

Description

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The invention relates to heat temperate, namely, devices for treating water, for example, in thermal desalination plants, in particular, to thermal disinfection plants. The known deaeration plant contains a jet deaeration column with nozzles for supplying deaerated water and Greek steam, removal of steam and water, and perforated shelves placed in the column. 1 The disadvantage of this setup is the low efficiency of deaeration due to the small specific surface of contact of water jets and steam. and significant underheating of deaerated water. Closest to the proposed technical essence and the achieved effect is a deaeration unit containing a jet deaeration column with nozzles for supplying deaerated water and evaporating the vapor and a perforated shelf, an evaporator made in the form of a tubular heat exchanger with nozzles for supplying heating steam and its condensate drain. street tank with a nozzle for deaerated water. However, the known installation is characterized by an insufficiently high deaeration efficiency, since when the heat exchanger is placed in the water volume of the tank, the vapor and gas bubbles capture the circulating water stream. The purpose of the invention is to increase the efficiency of deaeration. This goal is achieved by the fact that a deaeration plant containing a jet deair: ationation column with nozzles for supplying deaerated water and evacuating steam and a perforated butt, an evaporator, is made in the form of a tubular heat exchanger with nozzles for supplying heating steam and draining its condensate; The deaerated branch pipe is provided with a transverse grid and two vertical partitions fixed along its ends, installed in the column with the formation of channels with its wall and adjoining the shelf, m from the side of the water inlet pipe, the partition is installed with a gap relative to the shelf, the evaporator tubes are installed horizontally and placed above the battery tank, and through holes are formed in the partitions, while in the wall from the water inlet side they are over the grid, and on the other side both sides of the latter. FIG. 1 shows a deaeration plant, general view; in fig. 2 - installation, longitudinal section; in fig. 3 shows section A-A in FIG. 1. The deaeration unit contains a streamer deaeration column 1 with a nozzle 2 for supplying deaerated water and a perforated shelf 3, a storage tank 4 with a nozzle 5 for discharging deaerated water. Above the storage tank 4 is installed an evaporator 6 with nozzles 7 for supplying heating steam and - 8 for draining its condensate. Evaporator tube 9 6 installed horizontally. In column 1 there are vertical partitions 10 and 11, which form channels 1 and 12 with wall 1 and column 1, respectively. Column 1 also has a transverse grid 14, the ends of which are connected to partitions 10 and 11. Partitions 10 and 11 are connected to shelf 3, with shelf 3 installed with a gap 15 relative to the first. In the partition 10 there is a hole 16 above the mesh 14, and in the partition 11 there are holes 17 on the side of the latter. The transverse partition 18 is connected to the wall of the column 1 and the evaporator 6 and is installed with a gap 19 relative to the partition 11. The drainage from the deaeration column 1 of the slot and gases is carried out through the nozzle 20. The deaeration unit is closed as follows. The water to be deaerated is pushed onto the perforated shelf 3 and flows down into the water inlet of many jets exposed to the action of steam. When water is aggravated from it, some of the gases dissolved in it have been removed. The vaporized gas flow out of the colony 1 through the pipe 20. Next, the jets enter the grid 14, are crushed into smaller jets and drops, resulting in an increase in the contact surface of water and steam and, consequently, an intensified process of water deaeration. Small jet

The water flows to the surface of the evaporator tubes 9, on which a continuous turbulized film is formed. On the surfaces of the tubes 9, which are in the vapor space of the column 1, water is boiling up again and intensively removing oxygen and other gases from it. The flow in the form of a film through the tubes 9, the water undergoes final deaeration and flows into the accumulator tank 4, from where it is then discharged to the consumer through the nozzle 5, since the deaerated water enters largely deaerated water then almost pure water moves up between the tubes 9 Noah steam. That allows to intensify the process of deaeration. From the lower part of the evaporator, 6 pairs go through channel 12 to the upper part of column 1 and wash over jets of water flowing through shelf 3 "Part of the gas and steam flow

passes through the holes 17 and is removed from the column through the channel 13. The presence of the hole 16, the area of which is up to 5% of the area of the gap 15, accelerates the evacuation of gases and their circulation to provide a cross-flow of the vapor-gas mixture under shelf 3,

Supply of a deaeration plant with a cross-mesh and two vertical partitions fixed at its ends, forming cannulas in the column, presence of openings in partitions, installation of evaporator tubes horizontally above the accumulator Hbw tank makes it possible to organize the flow of deaerated water into small jets, efficient heating and boiling water , ventilation longitudinal and transverse vapor flows, which, ultimately, increases the efficiency of deaeration.

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Claims (1)

DEAERATED PLANT containing a jet deaeration column with nozzles for supplying deaerated water and outlet for vapor and a perforated shelf, an evaporator made in the form of a tubular heat exchanger with nozzles for supplying heating steam and drainage of its condensate, an accumulator tank with a branch pipe for removing deaerated water, characterized in that In order to increase the efficiency of deaeration, the installation is equipped with a transverse grid and two vertical partitions fixed at its ends, installed in a column with the formation of a channel fishing with its wall and adjacent to the shelf, and on the side of the water supply pipe the partition is installed with a gap relative to the shelf, the evaporator tubes are installed horizontally and placed above the battery tank, and through holes are made in the partitions, while they are made in the partition from the water supply pipe side above the grid, and on the other - on both sides of the latter. "Th C © <1