SU611655A1 - Dynamic mixer - Google Patents

Description

one

A mixer is available for mixing explosive and flammable gas streams with air; it can be used in chemical to other industrial sectors for mixing air with explosive gases, such as hydrogen, released from an electrochemical generator (ECH) and combustible air in catalytic furnaces

A gas mixer is known, which adjoins the mixing chamber with tubes into which the holes for supplying one of the components are filled. The tubes are located in the mixing chamber in a checkerboard pattern, and the gas discharge holes in them are filled with solid-like slits with narrowing nozzles directed at an angle to the flow direction m

The use of such a construction is unacceptable when using explosive gases to produce gas-air mixtures with a combustible gas concentration below the ignition limit (for example, when utilizing hydrogen produced during the operation of the ECG).

When dynamically mixing the gas with the air stream, there is some initial zone with increased concentration.

Placing the tubes in said mixer increases the mixing zone, with some of the tubes being in the mixing zone and, when using flammable and having wide concentration limits for gases, such as hydrogen, can cause the mixture to ignite.

0 by colliding with them of solid gas streams and play the role of combustion stabilizers. In this case, thermal destruction of 5 tubes of such a mixture is also possible.

In addition, the direction of the gas orifices at an angle to the direction of the other component leads to a slight increase in the gas dynamic resistance.

Known gas mixer, comprising a housing, a gas flow distributor and a blade turbulator, rigidly fixed in the housing to the gas flow distributor I.

The peculiarity of the tai mixer is the danger of working with flammable gases with a large length of the initial mixing zone,

With a view to INCREASE. 11, the efficiency and safety of work, in the proposed mixer, the turbulator is installed in front of the raspra divider of the gas flow and is made in the form of rigidly interconnected cones located in concentric circumferential m and facing vertices towards the air flow

Fig, 1 and the proposed mixer, type | in fig. 2 shows section A-A in FIG. 1} in FIG. 3; section BB in FIG.

The mixer comprises a housing 1 with flanges 2 for supplying the air line,

The casing contains a distributor 3 for the flow of gases, filled in the form of annular manifolds located in one plane perpendicular to the air flow. In the collectors, holes 4 with a diameter of not more than 1 and 2 mm, spaced at least eight hole diameters apart, are coaxial with the air flow.

In front of the gas flow distributor, at a distance of 30 mm, a turbulator 5 is installed, made in the form of cones rigidly connected between CO0, having a ratio of height to base diameter of 1.5-2 arranged in concentric circles. The number of cones is selected from n the area of clutter, equal to Sg.3.5,

The mixer works as follows. The device is supplied separately with air and combustible gas. The air supplied by the ventor (I haven’t shown J, the passage through the turbulence 5 and then between the collector tubes enters the mixing chamber. Combustible gas is supplied to the collector. Through the openings, 4 separate streams also fall into the mixing chamber. gases almost immediately outside the manifold. This produces a gas mixture that is not hazardous with respect to ignition (with a concentration of combustible gas above or less than the concentration limits of ignition).

The proposed mixer is characterized by high efficiency and safety of operation in combination with the simplicity of manufacturing technology.

Claims (2)

1. USSR author's certificate No. 415030, class, B 01 F 13/00, 1970, 2. The patent of Germany hfe 1557215, cl. 12 e 4/01, 1973. gas ig. one -   f "  “., . .  . YES GJ 1 O 55 6-b