LT6011B - Pulsing stream ejector - Google Patents

Abstract

The invention belongs to the field of liquid saturation by oxygen and can be used in water preparation systems, where it is necessary to saturate cleaned water with oxygen before the process of disposal of waste (pollution). Moreover, it can be used in other branches of industry, for example: biotechnology and chemistry, where liquid saturation processes involving gas are present, when the debit of flow is variable. Working liquid flow under the influence of pressure is distributed into socket's cavity, where it starts spinning because of the holes in the socket's wall placed in the tangential direction and it is directed there to the bottom of the socket. Additional spinned working flow's turbulence is created because of the rises present at the bottom. Negative pressure forms at the irregular triangle's leaned pyramid's form, where are the rises of the narrowest plane at the hole which is connecting the socket with the ejecting surrounding's chamber. Through this socket ejected flow enters, which mixes with the working liquid. When the dynamic and static pressure proportion changes, spinned flow starts flowing towards the diffuser closing working flow' s ability to enter through the holes into the socket and this lessens static pressure, therefore again it opens liquid' s flow through the holes placed in tangential direction towards the cavity of the socket. Process can repeat from 1 to 20,0 kHz. It creates good conditions for the mixture of two environments and the placement of rises on the bottom of the socket, increasing from the center of the socket towards the wall in radial direction. This guarantees equal passing of the ejected environment into the cavity of the socket when the debit of the working liquid is variable.

Description

The invention relates to the field of liquid oxygen saturation equipment and can be applied in variable flow drinking water treatment systems, which require purification of oxygen to the treated water immediately before the decontamination process, and can be used in other industries, such as biotechnology and chemical industries gas saturation processes with variable flow rates.

A known analogue is an ejector consisting of a housing containing a configurator with an elongated narrow side cylindrical portion, and the ejected medium enters the housing through a hole directed in the direction of the working fluid flow. In opposite directions, the fluid is mixed with the working fluid by helical lines disposed along the flow direction on the outer and inner surfaces. Effective mixing is only possible with a degree of turbulence that is directly dependent on the flow rate of the working fluid (see patent LT 5527 B, B01F 3/04 ONLY).

The design of this device cannot guarantee a stable concentration of the effluent medium in the working fluid at variable flow rates, and therefore its efficiency changes with the changing flow rate of the working fluid. This is especially true at low workflow rates.

Another known analog is the ejector mixer, which consists of a diffuser, a confuser and an orifice. The mouth of the mouth is connected to the channel by a channel. Ducts and protrusions are formed along the flow direction of the working flow on the surfaces of the confuser and the diffuser, resulting in more intense contact between the fluid and the working fluid (see WO99 / 28021, BOIF 5/04 ONLY). However, the system of channeled and raised channels in the analogue cannot provide a proportionate amount of fluid to flow through the working fluid. In the case of a variable working fluid flow rate, the amount of fluid to be ejected is not linearly dependent on the working fluid flow rate. This is especially true when you are in a low flow where cracks and bumps in the working fluid flow path cannot create sufficient flow turbulence. The nonlinear dependence of the volume of the fluid being injected on the working fluid flow decreases the efficiency of this mixer-ejector and reduces its application possibilities.

The aim of the proposed device is to increase the efficiency of the pulsating flow ejector by ensuring the linear dependence of the ejected medium flow rate on the working fluid flow rate.

The object of the present invention is achieved by providing an irregular triangular bevel pyramidal protuberances at the bottom of the mouth in a radial direction, in m, with a hole in the pyramid wall whose axis is perpendicular to the wall and the wall itself forms an angle a. The hole in the ascending wall connects the estuarine cavity with the cavity of the effluent medium. The working fluid cavity is connected to the mouth by holes which are tangential to the amount n, inclined at an angle β j to the bottom of the mouth. The number of moles with openings that connect the estuarine cavity to the euthanized cavity m, related to the number of openings connecting the working fluid and estuarine cavities, as follows:

m = kn, where: k is an integer £ 2.

The invention is illustrated by the drawings shown in FIG. 1-3.

FIG. 1 is a general view of the device in section. This drawing shows the ejector diffuser, the mouth, the bottom of the mouth with protrusions, and the holes for the ejection medium and the working fluid.

FIG. 2 - Section A-A in FIG. 1 through the openings at an angle β, tangential to the bottom of the mouth. This drawing also shows the location of the bumps at the bottom of the estuary with respect to the tangentially directed holes in the walls of the estuary.

FIG. 3 - section B - B fig. 2, it shows the position of the hole in the protuberance wall, which forms the angle of inclination α with the axis of the mouth and connects the cavities of the mouth and the passage.

The pulsating flow ejector, as shown in Fig. 1, consists of a housing 1 in which a diffuser 2 is formed. The cylindrical mouth 3 engages the diffuser 2 at a narrowing portion 4. The fins 3 are separated from the working fluid cavity 5 by a wall 6. Perpendicular to the axis 3 A bottom 8 is formed which separates the cavity of the mouth 3 from the cavity 9, formed in the housing 1. The bottom 8 of the mouth 3 has radially increasing directions towards the wall 6 arranged in an irregular triangular bevel pyramidal protrusions 10 having a narrow plane 11 with the axis 7. angle a. In the plane 11 of the projection 10, perpendicular to its surface, a hole 12 is formed which connects the mouth 3 with the cavity 9 of the fluid to be pierced.

In the wall 6 of the mouth 3, the holes 13 are formed tangentially and are angled β to the bottom of the mouth 8. The number m of the projections 10 with the holes 12 is related to the number n of the holes 6 of the wall 6 as follows:

m = kn, where: k is an integer £ 2.

Operation of pulsating flow ejector

The working fluid flow is pressurized to the working fluid cavity 5 in the housing 1, from which through the apertures 13 directed tangentially into the mouth cavity 3. Due to the tangential orientation of the apertures 13, the working fluid flow is screwed and due to their inclination angle β The twisted stream reaching the bottom of the estuary 8, where the protrusions 10 thereon disposed in a radially increasing direction towards the mouths of the mouth, causes additional turbulence of the twisted stream. The incremental flow turbulence caused by the variable height of the bumps decreasing towards the axis of rotation of the stream, which coincides with the axis of the mouth 7, remains constant as the rotation speed decreases towards the center and the length of the beam between adjacent bumps. In this way, the intensity of the turbulence remains constant over the entire length of the ascent. The flow directed to the bottom 8 and the mouth 3, bypassing the projection 10 at the edge forming the narrowest plane 11 with the bottom 8 in which the hole 13 is formed, creates a negative pressure thereon. Due to the formed negative pressure through the orifice 13 in the plane 11 of the projection 10, the ejected medium enters the jet 3. The ejected medium, due to the turbulence created by the projections 10, begins to mix with the working fluid. Due to the change in the density of the formed medium, the ejected zone at the next elevation changes, and the flow dynamic pressure changes, which also changes the ratio of the flow dynamic to the static pressure proportionally. The increased flow static pressure directs the formed mixture towards the diffuser 2. The flowing flow blocks the tangential holes 13 and stops the flow of working fluid from the cavity 5 to the mouth 3. The flow from the bottom 8 of the mouth towards the diffuser 2 decreases the static flow pressure, which opens the flow of the working fluid through the tangentially directed holes 13 3. As the static pressure decreases, the dynamic pressure increases proportionally, and the working fluid begins to flow again through the tangentially directed openings 13. The process repeats at a frequency depending on the working fluid pressure, the mouth 3, the pitch 13 of the openings. Flow pulsation rates can range from 1 to 20 kHz. The amount of medium to be ejected depends mainly on the size of the projection 10 and their relative amount relative to the orifices 13 in the tangential direction. The linear dependence of the amount of ejected medium on the working fluid flow at variable flow rates is provided by irregular triangular sloping pyramid projections 10 disposed radially and increasing towards the mouth wall 6 and defined by the number of openings 13 directed tangentially to the wall 6.

Claims (3)

DEFINITION OF INVENTION A pulsating flow ejector consisting of a housing (1) with a diffuser (2) having a tapered portion (4) extending into a cylindrical mouth (3) which forms a cavity (6) along its entire outer circumference (6). ), connected to a hole whose axis is perpendicular to the axis (7) of the mouth (3), characterized in that a bottom (8) is formed on the opposite side from the diffuser (2) perpendicular to the axis of the mouth (7) slanting pyramid-shaped protrusions (10) of irregular triangle increasing evenly towards the walls (6), with the narrowest lateral plane (11) of the pyramid forming an angle a with the axis of the mouth (7), the second lateral plane of the pyramid ) beginning descending towards the center of the mouth (7). A pulsating flow ejector according to claim 1, characterized in that a hole (12) perpendicular to said plane (10) is formed in the plane (11) of the inclined pyramid (10) of each irregular triangle forming an angle α with the axis of the mouth (7). and connecting the mouth (3) to the fluid cavity (5). A pulsating flow ejector according to claim 1, characterized in that the wall (6) of the mouth (3) has a tangentially formed bore (13), inclined to the bottom of the mouth (8) at an angle β and directed opposite to the bore (12). inclined pyramidal protrusions (10) perpendicular to the plane (11) and the number m of these protrusions (10) with holes (12) is related to the number n of holes (13) in the wall (6) as follows: m = kn, where: k is an integer> 2. working fluid is a fluidized medium