SU716983A1 - Vacuum thermal dearator - Google Patents

Description

one

The invention relates to devices for removing dissolved gases from water, in particular vacuum thermal deaerators operating on superheated water, and can be used in heat and power plants for thermal deaeration of water at low temperature.

A vacuum thermal deaerator is known, comprising a body in which inkjet and bubbling plates 1 are placed.

However, water cannot be used as a heating medium, it is overheated relative to the saturation temperature in the deaerator.

Also known is a vacuum thermal deaerator containing a housing divided by a boring horizontal sheet into a deaeration compartment with jet plates and an evaporative compartment with a nozzle for supplying superheated water 2. In this deaerator, water is used as a heating medium — water is overheated relative to the saturation temperature in the deaerator.

However, in such deaerators, in the presence of dissolved gases in superheated water, deaeration deteriorates / because the gases released from the superheated water are contained in the steam that treats the water at the end of the bubble plate and degrades the deaeration.

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

To do this, in the proposed deaerator, the superheated water pipe is equipped with screw guides, blades and a transverse partition located above them with a tube coaxially embedded in it, as well. in the walls of the nozzle and under the partition there are holes, the first of which face the inlet side of the bubbling plate, and the second ones - in the side of the outlet plate.

To prevent the steam from mixing in the evaporative compartment, a & JTb vertical set can be installed.

The drawing shows a vacuum thermal deaerator, incision.

It contains body 1, divided by horizontal bubbling sheet 2 on deaeration compartment 3 with jet plates 4 and evaporating compartment 5, in which a vertical soothing mesh is installed. In the nozzle 7 supplying heated water to the evaporating compartment 5 screw blades 8 are mounted; 9 and the pipe 10 coaxially with the pipe 7. The pipe 11 is designed to supply cold water, the pipe 12 - to drain water and the pipe 13 - to drain non-condensable gas. Holes 14 are made in the walls of the nozzle 7, located above the partition 9 and facing the entrance of the bubbling sheet 2, and holes 15 located under the partition 9, and facing the output of the bubbling sheet 2.

Cold water is fed through pipe 11 to the upper jet tray 4. Next, water flows in a jet stream to the downstream plates 4. In jet streams, the water is heated and partially deaerated. The final deaeration is carried out on the barbag sheet 2, after which the deaerated water flows down the deaerator housing 1 and through the nozzle 12 is removed from the deaerator.

Superheated water is supplied to the deaerator through nozzle 7, the section of the nozzles of the nozzle is chosen so that the water that enters the nozzle partially boils in it, and most of the gases are released from it, since the solubility of gases in water at saturation temperature to zero. In the inlet section of the nozzle, the water is twisted by screw guide vanes 8, due to which the vapor-gas mixture is pushed out to the axis of the nozzle, then comes out through the tube. 10 over the transverse partition 9 and directed through the openings 14 under the inlet of the bubbling sheet 2,

Water with a low concentration of gases comes out of the nozzle 7 through the holes 15 under the outlet of the bubbling sheet, and it boils. The non-evaporating part of it drains and then is discharged through pipe 12 from the deaerator. From the evaporative compartment 5, steam with a high concentration of gases escapes through the inlet part of the bubbling sheet 2 and then through the water layer on it, and the steam with a low concentration goes through the inlet part.

As a result, the quality of the deaeration is improved. Mixing of steam under the bubbling sheet does not occur, since the evaporative compartment is blocked by a soothing mesh. B. The steam that has passed through the bubble sheet and through the layer of water on it moves through the compartments of the deaerator, where it condenses on the water jets, and the non-condensable gases are removed from the deaerator Q through the nozzle 12.

In the proposed deaerator, non-aerated water is superheated as a heating medium; relative to the saturation temperature in the deaerator, and deaerated water is not supplied to the deaerator,

0 This simplifies the thermal scheme of the installation, as well as reduces the cost of electrical energy for pumping water in the installation scheme.

Claims (2)

Invention Formula 1, Vacuum thermal deaerator, comprising a housing divided 0 by a horizontal bubbling sheet onto a de-ozating compartment with a jet tray and an evaporating compartment with a superheated water supply nozzle, characterized in that 5 in order to improve the quality of deaeration, the nozzle is equipped with screw guide vanes and a transverse partition located above the nigli-lin with a coaxial nozzle inserted into it, and holes are made in the walls of the nozzle above and below the partition; , and the latter in the direction of the output part. 5 2. A deaerator according to Claim 1, characterized in that a vertical soothing mesh is installed in the evaporation compartment. Information sources, 0 taken into account in the examination 1, USSR Copyright Certificate 183769, cl. From 02 to 1/10, 1964. 2. USSR Author's Certificate No. 257511, class, C 02 B 1/10, 1968. jnji lii 11 II HI hi 111 Mi fH IGI ten 7 15