RU2359743C1 - Method and device for mixing fluids - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to mixing of two or more fluids, including gases, liquids and friable products, and can be used in heat-power engineering, oil refining, chemical and other manufacturing sectors. Fluids to be mixed are directed along spiral channels with different cross-sectional forms, intersecting at 90 degrees. The channels can be made on one cylindrical surface or on two coaxial cylindrical surfaces.

EFFECT: increase in the degree of mixing, acceleration of the mixing process and ensuring possibility of regulating the ratios of the mediums.

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Description

The invention relates to hydro-gas-dynamic equipment, and in particular to installations for mixing two or more fluids, including gases, liquids and bulk solids, and can be used in the power industry, oil refining, chemical industry, as well as in other industries where necessary use a mixture of loose body, liquid and gas.

In a number of chemical and petrochemical processes, good mixing of fluids is necessary, for example, during the drying of natural gas, and in the purification of natural gas from sulfur, H ₂ S, CO ₂ , etc. For this, various methods and devices for mixing media in absorbers are used: nozzle devices, perfusion of liquids through an oncoming gas stream, etc. However, known mixing devices and methods are not efficient enough or too energy intensive.

The developed mixer can be used for:

- compounding the components of commodity motor fuels and oils;

- preparation of a reagent mixture with water for oil desalination processes;

- mixing with streams of various anti-corrosion additives;

- preparation in a stream of various solutions of alkalis, acids, etc .;

- mixing various streams in order to reduce the distance between the mixer and various devices for carrying out processes.

The specified list does not limit the possibility of using the developed mixer.

Known (RU Patent 2216650 F04F 5/02, 2003) is a liquid-gas jet apparatus comprising supply channels of active and passive flows, mixing chambers, a diffuser, a nozzle block with at least one nozzle, at least one primary chamber mixing, located in front of and at least partially around each of these nozzles, a secondary mixing chamber, the input of which is located in front of the outputs of the primary mixing chambers, and the output is combined with the entrance of the diffuser, and a receiving chamber, in which the nozzles of the nozzle block are placed, the primary chambersmixing and entrance of the secondary mixing chamber.

When implementing the known device through the channels for supplying flows, mixed media are fed into the device, which are mixed with each other during passage through these nozzles and mixing chambers.

A disadvantage of the known method and apparatus should be recognized as an insufficient efficiency due to the non-optimal organization of mixing active and passive flows.

Known (RU, patent 2205994 F04F 5/02, 2003) is a liquid-gas jet apparatus comprising a nozzle unit with at least one nozzle, at least one primary and one secondary mixing chamber, the entrance of the secondary mixing chamber being located in front of the outputs of the primary mixing chambers, and the receiving chamber, in which the nozzles of the nozzle block are located, the primary mixing chambers and the entrance of the secondary mixing chamber, while the primary mixing chamber is partially located around the nozzle, and the output of the secondary mixing chamber is aligned with the diffuser. Typically, the nozzle exit is separated from the primary mixing chamber by a distance of not more than 100 diameters of the nozzle exit section.

When implementing the known device, also through the channels for supplying flows to the device serves mixed media, which in the process of passing through these nozzles and mixing chambers are mixed together.

A disadvantage of the known method and apparatus should also be recognized as an insufficient efficiency due to insufficient organization of the mixing of active and passive flows.

The technical problem, solved using the apparatus of the proposed design, is to optimize the mixing process of the supplied flows.

The technical result obtained by the implementation of the proposed technical solution consists in increasing the efficiency of the device and the method of mixing.

To obtain the specified technical result, it is proposed to use the developed method for mixing fluids. When implementing the developed method, at least two streams of mixed fluids (liquid and / or gaseous) are guided through screw channels located at least on one closed surface of the mixer and oriented at an angle α with respect to each other. The specified angle α can be from 5 to 175 °. In a preferred embodiment, the angle α is 90 °. The angle α depends on the flow rates, the physical characteristics of the flow media, the required degree of mixing, and other technological factors. In a preferred embodiment, these channels are used located on a cylindrical surface. However, any other closed curved surface, in particular oval, can be used. When implementing the method, you can use channels having different cross-sectional areas and / or having different cross-sectional shapes. Such a design of the channels makes it possible to further control the mixing of fluids, changing both the number of components supplied to the mixing and their flow rate. Preferably, the velocities of the mixing flows are within 0.1 m / s to the speed of sound. If necessary, mixed media are fed into the device with different flow rates. It also allows you to control the mixing of fluids. To increase the degree of mixing, as well as speeding up the process, sometimes preliminarily, the media are partially mixed using absorbers of various designs. Usually use screw channels twisted clockwise and screw channels twisted counterclockwise located on opposite sides of a closed surface.

To obtain the specified technical result, it is proposed to use, as an option, the developed fluid mixing device. The developed device contains at least two coaxially located elements, the outer surface of one of them touches the inner surface of the other element, and at least one screw channel is made on each of the contacting surfaces, and the channels on the contacting surfaces are located at an angle α to each other. In a preferred embodiment, the elements used are tubular in cylindrical shape. This simplifies the process of cutting channels and, at the same time, reduces the mass of the structure. Typically, the projections of these channels intersect at an angle α from 5 to 175 °, preferably at an angle α equal to 90 °. The channels used may have a different sectional area and / or a different sectional shape. This leads to the expansion of the capabilities of the device when mixing fluids by providing the possibility of additional regulation of the degree of mixing. The inner part of the central element of the device may be hollow or solid.

When implementing the developed method, more than one developed device can be used, and the devices used can be connected both in series and in parallel.

The developed technical solution is characterized in that the mixed media enter the channels located on preferably cylindrical surfaces intersecting at an angle α (preferably 90 °) and at the points of contact of the channels forming joint cavities. In these cavities, at the intersection of flows (one flow swirls clockwise, the other counter-clockwise), maximum turbulization is formed and the flows are mixed. Due to the high flow rates, the intensity of mixing of the media is significantly higher than in the known mixer-absorbers.

The graphic material shows the preferred options for implementing the developed technical solution, including a cross section of the mixer (Figs. 1 and 2), as well as an example of their use for mixing two media (Fig. 3).

Further examples of the implementation of the developed technical solution are given with reference to the drawings.

The device always contains the first 1 and second 2 coaxially located elements, as well as screw channels 3.

Example 1

Different flows are mixed (gas-gas, gas-liquid or liquid-liquid, gas-free-flowing body). The flow of flows occurs directly into the channels (figure 1 or 2). After the mixer, mixed media emerge.

Example 2

The gas-liquid flows are mixed (FIG. 3). Gas is supplied to the pipe 4, the liquid is supplied through the nozzle 5. The primary mixing of the flows takes place in the mixer 6, the final - in the mixer 7. The mixers 6 and 7 are made similarly to the mixers shown in figures 1 and 2, with a solid central part.

Using the developed technical solution allowed to increase the efficiency of mixing relative to the known mixing process using adsorbers by 17%.

Claims (8)

1. A method of mixing fluids, characterized in that at least two streams of mixed fluids are directed through screw channels having a different cross-sectional shape, located on at least one cylindrical surface of the mixer and oriented at a 90 ° angle to each other to friend. 2. The method according to claim 1, characterized in that the use of screw channels twisted clockwise and screw channels twisted counterclockwise located on opposite sides of a closed surface. 3. The method according to claim 1, characterized in that use channels having a different cross-sectional area. 4. The method according to claim 1, characterized in that the mixing flows are fed at speeds from 0.1 m / s to the speed of sound. 5. The method according to claim 1, characterized in that the mixed medium is supplied at different rates. 6. The method according to claim 1, characterized in that the pre-medium is partially mixed using absorbers of various designs. 7. A fluid mixing device, characterized in that it contains at least two coaxially arranged tubular cylindrical elements, the outer surface of one of them touching the inner surface of the other element, with at least one of the contacting surfaces one screw channel, and the channels on the contacting surfaces have a different cross-sectional shape and are located at an angle of 90 ° to each other. 8. The device according to claim 7, characterized in that the channels have different cross-sectional areas.

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