SU1554954A1 - Apparatus for mixing gases - Google Patents

Abstract

The invention relates to a power system and can be used to mix gases and vapors having different temperatures. The device is designed to improve the quality of gas mixing. The device consists of a supply pipe 1, coaxially of which is installed a nozzle 2 of smaller diameter for supplying a second gas, at the exit edge of the nozzle there are swirlers 4. Inside the swirlers there are screw partitions 5. The entrance edges of the partitions are tangential to the surface of the nozzle 2. Supply pipe 1 and the nozzle 2 can be made in the form of a forward and reverse hollow cones, respectively, with a constant cross-sectional area, and a mixing chamber in the form of a hollow cylinder passing into a confuser. In this embodiment, the swirlers 4 may be spaced from the pipe 2 at a distance of the order of one diameter of the swirler. 3 hp f-ly, 5 ill.

Description

1

The invention relates to a power system and can be used to obtain homogeneous isotropic working fluids, in particular for mixing superheated vapors having different temperatures and used as a working fluid in a steam turbine installation.

The aim of the invention is to improve the quality of mixing.

1 shows the proposed device, a longitudinal section} in FIG. 2 is a section A-A in FIG. 1; FIGS. 3 and 4 are embodiments of the device; FIG. b is a section BB in FIG. 4.

VrijKMi about 1 / s of gmet1n and i izop contains 1y; a cylindrical tube 1, inside which is coaxially installed at the foam pipe of the second gas, and a cylindrical mixing chamber 3, inside which at least two nozzles are installed close to the outlet edge of the pipe A vortex 4 with screw-like partitions 5 and 6 placed inside, the inlet Kpotfkn 7 of which are tangential to the surface of the nozzle 2. The supply pipe 1 and the nozzle 2 (Fig. 1) in the joint zone of two grooves can be made in the form of a straight 8 and back There are 9 hollow cones (figs. 3 and 4) with a constant cross-sectional area, and the mixing chamber is made in the form of a hollow cylinder 10, which goes into a hollow cone (condenser) 11 with a constant cross-sectional area, and then into a cylinder 12. In addition, in the case where the inlet pipe and the inlet-in the joint zone of the two slots are made in the form of two hollow cones (Fig. 4), the swirlers 4 can be separated from the outlet edge of the socket at a distance of about one diameter of the swirler.

The device works as follows.

The first working fluid, for example superheated steam with temperature t through supply pipe 1, and the second working fluid, for example superheated steam, with temperature ta via pipe 2 enter the mixing chamber 3, which at the gas outlet from the pipe two vortexes and the partition installed in each of them is divided into six independent zones. Thanks to that

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the entrance edge of the partition is rotated relative to the exit, i.e. the partition wall is curved, the working fluid rotates relative to the axis of the swirler (Fig. 1, shaded sections), and at the exit of it a uniform distribution of the working bodies with different temperatures in the volume of the mixing chamber 3 is ensured, which leads to high-quality mixing with their further movement - the operating chamber and thus the same temperature of the working medium is achieved throughout the entire cross section of the flow. The number of nozzles with partitions depends on the flow of working fluids, and the angle of rotation of the output edge of the partition relative to the input depends on the ratio of the flow of working fluids. With an increase in the number of nozzles, the quality of mixing of the latter increases. The swirlers of two hollow cones 8 and 9 (Fig. 3) of constant cross section, the taper of which is directed towards each other, increase the contact surface of the working fluids and ensure the mutual penetration of the fluxes of working fluids with different temperatures into each other, thus improving the mixing process. The efficiency of mixing is achieved more when the swirlers 4 (Fig. 4) are separated from the exit edge of the pipe 2 at a distance of about one diameter of the nozzle.

The use of a device for mixing gaseous bodies in steam turbine installations will allow, by mixing two streams of superheated steam with different temperatures, to obtain an isotropic working fluid at the outlet of the proposed device with minimal hydraulic losses. The device is characterized by simplicity of design and low cost of manufacture.

Claims (3)

1. Device for mixing ga-. The call contains a supply pipe, inside which a gas supply nozzle is installed coaxially, a cylindrical mixing chamber and a swirler, characterized in that, in order to improve the quality of mixing, the device contains additional swirlers, all of which are swirled in the form of cilii spiral pipes with an inlet edge which is located tangentially to the nozzle surface. 2. The device according to claim 1, characterized in that the nozzle is made in the form of an inverse cone, the supply pipe is made in the form of an annular gap with a diameter decreasing along the flow, the output section of the mixing chamber is made in the form of a confuser, passing into the cylinder, with this pass square B4934 ppd sections of a single rp -pc. ;; ltrubg.: and confuser mixers, h gdm ry, -. then nna 3. The device according to PP. 1 and 2, o t - in that the swirlers are mounted close to the exit edge of the nozzle. Jq4. A device according to claim 2, characterized in that the evacuators are installed at a distance of one scatter diameter from the exit edge of the nozzle. Fig.Z fig .. 12 Schig.b 66 push. $