RU1800227C - Steam cooler - Google Patents

Abstract

Scope: in boiler turbine blocks of power plants. SUMMARY OF THE INVENTION: in the mixing chamber, the projections of the same holes form polygons, the output sections of which are oriented in one direction opposite to the orientation of the output sections of the holes, the projections of the axes of which form an adjacent polygon. 2 ill.

Description

The invention relates to a power system, in particular to devices for controlling the temperature of superheated steam.

The aim of the invention is to increase the reliability and cooling efficiency.

In FIG. 1 shows a General view of the device; in FIG. 2 is a section AA in FIG. 1.

The steam cooling device comprises a steam pipe 1, in which a mixing chamber 2 is installed, made in the form of a venturi. In the narrowed part of the venturi 3 there are holes 4, which are provided with water distributors 5. There are holes 6 on the side of the water distributor. the axes of the holes 6 are located on the sides of the regular polygons inscribed in the coaxial Venturi 2 conditional circles 7, while the projections of the axes of the holes 6 are located on the sides, form one polygon, have one oic orientation relative to the axis of the Venturi tube 2, for adjacent polygons - the opposite orientation. The relationship between the geometric parameters of the holes 6 is ensured by the constant ratio

A p

doi:

di Vd i -1

where n is the number of sides of the polygon;

do - hole diameter 6;

d is the diameter of the circumference 7;

I is the number of the conditional circle (counting from the axis of the camera 2, and when).

Pipeline 1 receives a steam stream into the mixing chamber 2, made in the form of a Venturi pipe. Water through the holes 4 enters the water distributors 5, and from them through the holes 6 in the form of a system of transverse jets into the steam stream. The distribution pattern of the openings 6 determines the formation of several annular intensive mixing zones, for the latter of them the direction of swirling of the cooling water jets and the mixture flow is opposite. At the same time, there is a sharp gradient of the tangential component of the velocity at the border of the zones of heavy traffic, which leads to the realization in the radial direction of a high level of uneven distribution of speeds and an intensive smoothing out of the uneven distribution of parameters along the length of the device.

In the case where the relationship between the geometric parameters of the holes and the sizes of the intense mixing zones obey the proposed relation (parameter A), there is no global unevenness. That is, the weight average content of cooling water in the radial and circumferential directions in the mixture stream is kept constant. In the case when the sizes of the holes and zones do not obey the proposed ratio (on either side, larger or smaller), global unevenness occurs, which delays the process of aligning the distribution of parameters along the length of the device.

Using the proposed technical solution allows to increase the reliability of the device for cooling steam due to the intensification of mass transfer processes in the device.

Claims (2)

1. A device for cooling steam, containing installed in the pipeline mixing chamber, made in the form I3 Gjg about 5 Venturi pipes with water distributors located in its narrowed part, with openings made on their lateral surfaces, the projections of the axes of the latter are located on the sides of regular polygons inscribed in conventional circumferential venturi pipes, each of which, in order to increase reliability and cooling efficiency, the polygon is formed by the projections of the axes of the holes, the output sections of which are oriented in the same direction, opposite the orientation, the output sections of the holes, the projections of the axes of which comfort neighboring polygon. 2. The device according to p. 1, characterized in that the ratio twenty A p Jo d, 2 / d, -i 2 where n is the number of sides of the polygon; do - hole diameter; d is the diameter of the conditional circle; i is the number of the conditional circle (counting OT ° camera s), is a constant value.