SU879234A1 - Surface condenser - Google Patents

Description

The invention relates to the field of power engineering, in particular to surface condensers, mainly steam turbines.

Known surface condenser containing a steam supply manifold in the upper part, vertical pipes with a stepwise decreasing diameter along the steam diameter, a condensate collector and a condensate drain device mounted on the 10 junction of pipes of different diameters [1]. Pipes are placed between the tube sheets.

The disadvantage of such a condenser is its low efficiency, due to overcooling of the condensate. fifteen

The purpose of the invention is to increase efficiency by eliminating hypothermia of the condensate.

To achieve this goal, the condensate drainage device is installed at least at the junction of the first three pipes along the pair of pipes and is made in the form of an annular tray formed by two adjacent walls of different diameters and communicated with the center of the pipe through gutters uniformly placed 25 around the circumference.

In FIG. 1 schematically shows a general view of a surface capacitor; in FIG. 2 - the same embodiment; in FIG. 3 is a section along A — A of FIG. 1. 30

Between the upper 1 and lower 2 pipe boards are vertical pipes 3 with stepwise decreasing diameter along the steam, consisting of hermetically 5 joined sections. Sites of smaller diameter enter the inside of sections of larger diameter, the latter having an end rolled up inward. In the place of rolling, annular trays 4 for collecting condensate are formed. The gutters 5 connecting the trays 4 with the central part of the pipes 3 are designed to drain condensate. They are evenly spaced around the circumference.

The condensate drainage device can be made in the form of a collector 6 connected to the annular trays 4 with openings 7. The collector 6 can be mounted outside the pipe 3, as shown in FIG. 2, or inside the pipe 3 (this option is not shown in the drawing) in the zone of the lower sections, where the condensate flow is greatest.

A condensate collector 8 is located at the bottom of the condenser, and a steam supply manifold (not shown) at the top ·.

The capacitor works as follows.

Steam is supplied to the condenser from above through a steam supply manifold, enters pipes 3, washed externally by a cooling medium, and condenses on their walls. Condensate flows onto the annular trays 4 and is discharged along the channels 5 to the center of the pipe 3. In the condensate collector 8, the condensate drains out without touching the pipe walls 3. Therefore, there is no condensate film in the pipe sections 3 located below the trays 4.

. In the embodiment of the condenser with the collector 6, the condensate from the trays 4 is removed through the holes 7. The pipe walls are freed from condensate, which increases the intensity of heat transfer through them.

Claims (1)

Claim A surface condenser containing a steam supply manifold in the upper part, vertical pipes with a diameter stepwise decreasing along the steam, a condensate collector and a condensate drainage device installed at the junction of pipes 5 of different diameters, characterized in that, in order to increase efficiency by eliminating condensation supercooling, the device for condensate drainage, it is installed at least at the junction of the first 10 three along the pair of pipes and is made in the form of an annular tray formed by two adjacent walls of different diameters meter and communicated with the center tube through evenly spaced on the circumference of the troughs.