SU1760243A1 - Steam cooling device - Google Patents

Description

(21) 4820035/06 (22) 13.03.90 (46) 07.09.92. Bul Me 33

(71) Kazan branch of Moscow Power Engineering Institute

(72) Yu.A.Spiridonov, F.Z. Tinchurin, M.Yu.Spiridonov and A.Yu.Spiridonov

(56) USSR Author's Certificate N 1390478. cl. F 22 G 5/12. 1986

USSR author's certificate number 1666856. class. F 22 G 5/12. 1989.

(54) STEAM COOLING DEVICE

(57) Uses: for cooling steam in boiler-turbine units. Summary of the invention: nozzles 2 are installed in the holes, the axes of which coincide with the axes of the holes, and the difference of the angles of inclination of the axes of the nozzles 2 adjacent pairs to the axis of the steam pipe 1 does not exceed 35 °. 3 il.

(L

with

VI

oh oh

Yu

four

SA)

The invention relates to energy and can be used in boiler-turbine units for cooling steam.

A device is known that contains a combustion chamber, on a side surface of which a group of nozzles is installed one at a time, directed in pairs towards each other and tangentially to the surface of the conventional cylinder 1.

The main drawback of the device is that the efficiency of the technological process in variable modes is insufficient, due to the discreteness of the jet supply.

The closest technical solution is a device containing an annular collector of cooling water installed in the steam line with a series of holes combined into locally placed pairs, the axes of the holes in each pair are located on a tangent to the surface of the conventional cylinder parallel to each other and at specified angles to the radius and axis of the steam line 2.

The main drawback of the device is the low efficiency of the process within the stabilization area.

The purpose of the invention is to increase efficiency.

This goal is achieved due to the fact that a device for cooling steam, which contains an annular cooling water collector installed in the steam line, with a number of holes combined in oppositely placed pairs, the axes of the holes in each pair are located tangentially to the surface of the conventional cylinder. the angles to the radius and axis of the steam line, with nozzles installed in the holes, the axes of which coincide with the axes of the holes, and the difference between the angles of inclination of the axes of the nozzles of adjacent pairs to the axis of the steam lines but does not exceed 35 °.

Studies have shown the following:

An increase in the mixing efficiency under the condition of restriction on discreteness is possible due to a decrease in the pitch between the holes in the cross, i.e. the introduction of additional groups of nozzles in the web;

the angle between the individual groups of nozzles (not more than 35 °) makes it possible to eliminate the impact of the jets belonging to different groups and to avoid a significant increase in the length required for mixing;

touching the axes of the nozzles of the surface of a conditional cylinder allows obtaining a stabilization platform, i.e. a certain range of modes, within which the quality of mixing is constant.

An analysis of the scientific and technical and patent literature has shown that the known technical solutions that have features similar to those distinguishing the invention from the prototype have not been found. The proposed technical solution has significant differences.

FIG. 1 shows the proposed device in longitudinal section: in FIG. 2 - section A-A in FIG. one; in fig. 3 - scheme

5 placement of opposite pairs.

The device consists of a steam line 1, a mixing chamber 4 with a thin-walled shirt 5, an annular water collector 3 and nozzles 2, combined in an opposite way.

0 placed pairs, and their axes relate to the conditional cylinder. The difference in the angles of inclination of the axes of the nozzles of adjacent pairs to the axis of the steam line does not exceed 35 °, and the projections of the axes of the nozzles onto the plane of the transverse section of the steam line are pairwise directed towards each other.

The device works as follows.

Steam enters through the steam line 1 into the combustion chamber “1. Water from the collector 3 goes through the nozzles 2 and mixes efficiently with the steam to cool it.

The studies were carried out in the laboratory of Hydrogasdynamics in a wide range of changes in the geometric and operating parameters, g 0-0.80; t 0.0980, 784; d 0.01-0.10; showed that the maximum value of the mixing quality takes place at Yes 35 °. Here

45

g - Gi 7- t.

  I / G

C1 + G2A

-H-: vЈT

G - mass flow rate;

d is the diameter;

t is the pitch between the holes;

And - the characteristic size of the stream:

(l - coefficient of consumption; - the difference between the angles of inclination of the axes of the nozzles of adjacent pairs to the axis of the steam line

Indexes: 1 - transverse jets. 2 - drift flow, e - equivalent, n - geometric at the nozzle exit, and conditional (cylinder).

Claims (1)

Claims of Invention A device for cooling steam containing an annular collector of cooling water installed in the steam line with a series of holes combined into oppositely placed pairs, the axes of the holes in each pair being tangential to the surface of the conventional fig. 2 lindra, parallel to each other and at given angles to the radius and axis of the plane, in order to increase efficiency, nozzles are coaxially mounted in the holes, and the axes of the adjacent pairs of holes are inclined to the axis of the steam line at angles different from each other. other by an amount not exceeding 35 °. figs