SU492706A1 - Evaporative installation - Google Patents

Description

(54) EVAPORATORY INSTALLATION

one

This invention relates to the field of power engineering.

Evaporating installations are known, comprising a housing with a heating section placed in water JHOM of the latter, with a heating section, above which a distribution damper is installed.

However, since such installations contain various types of damping devices i (perforated sheets, corner structures; tg 1, etc.), they either have a limited efficiency (in operation; evaporation: installations), or hydraulic losses in the circulating circuit of the evaporator, leading to the production of low quality steam.

The invention is an improvement in steam quality.

This is achieved by the fact that the distributor-extinguished device is exaggerated in the form of an annular radial blade grid with curvilinear blades, inclined by JHbiMM to the radius at the input and at the output.

Figure 1 shows the upper part of the evaporator unit, a longitudinal section; FIG. 2 is a transverse slit |, A — A in FIG. FIG. 3 shows the placement of the blasts; tei of the damper of the damping device relative to the pipes of the heating section. 5 The evaporative installation contains: case 1, in the water volume of which there is an installation; a heating section with nozzles 3 is installed; above it there is a ring grille 4 with profiled blades 5., | ф The grille is installed above the heating tubular section by means of a bandage to which the blades are attached 5. In the pentre (the hull of the hull (there is a nozzle 7 for supplying heating

5 {primary pair.

Blades; extinguishing devices have j curvilinear profile, the parameters of which are selected depending on the mode of operation of the evaporative installation c;

0 The goal of ensuring minimum profile losses. The entry angle et is chosen in the range of 75-90 °, the exit angle is -15-50.

In the horizontal plane, the blades are curved so that they provide

5 souring the steam / water mixture at the outlet

from the lattice at an angle G, the value of which can be 20-60 °. When profiling the blade grate, a certain amount of overlap of the cross section is provided, preventing the steam-water mixture from the pipes 3 of the heating section 2 into the vapor space of the evaporator unit.

The primary steam is supplied to the installation through the pipe 7 and enters the annular space of the heating section 2, where it gives off its heat to the feed water. Formed in the pipes 3, the steam duct on the mixture rises up under the action of the pressure created by the difference in weight of the pillars of the bone in the annular space between the housing and the heating section and in the tubes

The jets of the steam-water mixture from the tubes 3 are directed to the interscapular space in the profiled grid 4. The circumference is equal to the speed of the steam-water CTpyi at the exit of the grid provides an organized rotational movement of the feed water over the heating section 2. EkJ; The centrifugal forces that occur during the rotation of the feed water layer help the movement of the steam emulsion and foam to the walls of housing 1 and the subsequent destruction of the foam, as a result of which stable accumulations of the evaporation mirrors do not occur on the surface of the evaporation mirrors.

one

In addition, agitated radial flows in the water volume above the heating section contribute to the destruction of steam bubbles and the reduction of mechanical moisture loss with steam that occurs when the steam vapor breaks on the surface of the evaporation mirror. Stream parv; formed on the rotating surface of the liquid, is twisted, as a result of which its mechanical separation improves. Without evaporation of water thrown by centrifugal forces to the walls of the body, falls into the annular space between the housing 1 and the heating section 2 and goes down, the circuit closes.

inventions

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20

An evaporative unit containing iKOpnyc with a heating section placed in the water volume of the latter, above which a distribution box is installed

25 a device characterized in that, in order to improve the quality of the ball, the distribution damping device is made in the form of an annular radial-blade grille with curved blades 90 inclined to the radius at the entrance and at the exit.

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