RU75589U1 - STATIC INJECT MIXER - Google Patents

Abstract

The utility model relates to the field of mixing liquid media, in particular, to devices for mixing purified water with reagent solutions in a liquid stream and can be used in the treatment of both natural and wastewater.

Known jet mixer for mixing liquid media, consisting of a mixing chamber placed in a liquid stream in the form of a cylinder with a drop-shaped cross section; inside the cylinder, a perforated tube for reagent input is installed. The inlet openings for the water inlet of the mixing chamber are located on a portion of the side surface, along the generatrix of the cylinder, opposite its pointed part, and the outlet openings for water are located on the lateral surfaces of the cylinder.

A disadvantage of the known mixer is not a sufficiently high mixing effect and high cost.

A static jet mixer including a drop-shaped tubular mixing chamber placed in the stream, equipped with water inlet openings located frontally with respect to the direction of flow along the mixing chamber generatrix, and water and reagent mixture outlet openings located on the side surfaces along the generatrix, and central perforated tube for reagent inlet, the mixing chamber placed in the pipeline is equipped with an ejector, a coaxial tube for reagent inlet, the ejector is provided with openings for water entry into it, located opposite the front openings of the mixing chamber, and symmetrical openings for the exit of the mixture of water and reagent, located on the side surfaces along the generatrix along the entire height of the ejector, equidistant from the inlet openings of the latter and from each other,

the central inlets of the mixing chamber are made in the form of rectangular windows with a decrease in their area from the center to the periphery, the perforation of the reagent inlet tube is located on the frontal surface with respect to the stream of purified water with a step increasing in height from the center of the tube to the periphery, and the mixing chamber made in the form of a removable module placed in the pipeline. 1 s.p. f-ly, 1 ill.

Description

The utility model relates to the field of mixing liquid media, in particular, to devices for mixing purified water with reagent solutions in a liquid stream, and can be used in the treatment of both natural and waste water.

Known static jet mixer, consisting of a horizontal cylindrical body with input and output devices and disk-shaped mixing elements installed inside the body, one of which is element A on the front side has several parallel channels that are not connected to each other orthogonal to the main direction of flow; moreover, in the bottom of the channels there are through holes. The second disk-shaped mixing element - B, connected to the first element A on the front side has several parallel channels connected to each other orthogonal to the main direction of flow, and in the side walls of the channels there are openings for the medium to flow in the main direction of flow. On the reverse side of the mixing element B there are several parallel, not connected to each other channels, orthogonal to the main direction of flow. The configuration of the channels in the mixing elements and the location of the through holes in these channels contribute to a constant change in the direction of flow of the medium. Interconnected mixing elements A and B can be installed in the housing, forming a series of the nth number of pairs of the above elements; this provides for the possibility of such assembly of paired elements, when part of them

installed at an angle of 90 ⁰ with respect to the central axis of the housing (see International Application WO No. 2005049186 A2, IPC B01F 5/06 with priority 02.06.2005, publ. 12.11.2006, ISM No. 12, 2006).

A disadvantage of the known mixer is the increase in resistance during the mixing process due to multiple contact of the flow in the chamber with barriers - the walls of the channels of the mixing elements of the chamber and their bottoms, which entails an increase in energy consumption.

Known static jet mixer, consisting of a pipeline for supplying a fluid branched into 2 pipelines of smaller diameter, made with bends along the flow path; guide vanes are installed at the bend points of the pipelines, and then horizontal or vertical perforated plates are installed in the pipeline, covering the entire cross section of the pipeline. These plates form the passages, providing the division of flows into sub-flows. In each of the aisles mounted centrally placed and freely suspended in the form of vertical garlands blades of various profiles, for example Z-shaped; the edges of the blades are serrated, and the blades themselves are installed with a given step. Thus, macroturbulence fields are formed in the mixer in the mixer zone preceding the formation of subflows, i.e. to overlap the cross-section of pipelines with partitions, and the microturbulence field in the passages formed by horizontal or vertical partitions, especially around the blades where vortices form. The fields overlap each other, contributing to an increase in the mixing effect (see application RU No. 2005 136 880 / 15A, IPC B01F 5/06, priority AU 02/09/04, publ. 03/20/06, B.I. No. 8. 2006).

A disadvantage of the known mixer is an increase in resistance during mixing caused by contacting the flow with such obstacles as channels changing their direction in height, partitions along the entire cross section of the channels, dividing the flows into subflows, multiple blades of complex configuration, freely suspended between the partitions; all of the above leads to an increase in energy consumption and, consequently, to an increase in the cost of the mixing process.

Known static mixer with radial hydraulic dispersion Radialmix, designed to mix water with reagents in a pipe with a diameter of 100-400 mm and consisting of a nozzle with a screw thread mounted along the axis of the pipe, a diaphragm with a peripheral outlet relative to the walls of the pipe and the pipe for introduction reagents installed perpendicular to the direction of movement of the main water flow (see Technical Reference for Water Treatment, Vol. 2, Degremont, Novyi Zhurnal, ST. PETERSBURG, 2007, p. 8 19).

A disadvantage of the known mixer is an increase in resistance during the mixing process, caused by swirling the flow in the nozzle, and, therefore, to increase the cost of the mixing process.

Known jet mixer for mixing liquid or gaseous media, the closest in purpose and technical essence to the claimed, consisting of a mixing chamber placed in a liquid stream in the form of a cylinder with a droplet-shaped cross section; inside the cylinder, coaxially to it, at least one perforated perforated tube for the reagent inlet is installed. The inlet for water inlet of the mixing chamber is located on the side surface, along its generatrix

(cylinder) opposite its pointed part, and water outlet openings are located on the other side of the cylinder. A variant of the mixer is a design where the pointed part is cut off at the cylindrical mixing chamber of the drop-shaped section. Two perforated tubes can be located in the mixing chamber for introducing various reagents (see patent RU No. 2 306 171 IPC B01F 5/06, priority December 16, 2005, publ. September 20, 2007 B.I. No. 26).

A disadvantage of the known mixer is the low mixing effect, since the mixing process is carried out in almost two stages: in the mixing chamber and outside it in the pipeline itself, which entails an increase in the consumption of reagents and an increase in cost.

The technical result of the proposed technical solution is to increase the degree of mixing of purified water and reagents, a significant reduction in the consumption of reagents and, as a result, a reduction in the cost of water treatment.

The technical result is achieved in that in a static jet mixer including a drop-shaped cylindrical mixing chamber placed in the flow, equipped with water inlet openings located frontally with respect to the direction of flow along the mixing chamber generatrix, and outlet openings for the water and reagent mixture located on the side surfaces, along the generatrix, and the central perforated tube for introducing the reagent, the mixing chamber placed in the pipeline is equipped with an ejector coaxial to the tube To enter the reagent, the ejector is equipped with holes for entering water into it, located opposite the front holes of the mixing chamber, and symmetric holes for the outlet of the mixture of water and reagent, located on the side surfaces along the generatrix along the entire height of the ejector,

equidistant from the inlet of the latter and from each other, while the central inlet openings of the mixing chamber are made in the form of rectangular windows with a decrease in their area from the center to the periphery, the perforation of the reagent inlet tube is located on the frontal surface of the treated water with increasing height from the center of the tube to the periphery in steps, and the mixing chamber is made in the form of a removable module placed in the pipeline.

Figure 1 presents a static jet mixer, view aa.

Figure 2 presents a static jet mixer, view along BB.

Figure 3 presents a removable module, side view.

Static jet mixer consists of:

a drop-shaped mixing chamber in terms of section 1 mounted in the pipeline and equipped with a central tube for introducing reagent 2 with perforation located on the surface frontal with respect to the stream of purified water and with a step increasing in height from the center of the tube 2 to the periphery, with input central windows for water 3, located frontally with respect to the direction of flow along the generatrix of the mixing chamber 1, and outlet openings for the mixture of water and reagent 4, located on the lateral surfaces of the mixing chamber 1, along its generatrix, over the entire height of mixing chamber 1. The area of the inlet windows 3 decreases from the center to the periphery.

The mixing chamber 1 is equipped with an ejector 5, a coaxial tube for introducing reagent 2. The ejector 5 is equipped with openings for water inlet 6, located opposite the front windows 3 of the mixing chamber 1, and symmetric outlets of the mixture of water and reagent 7, located on the side surfaces of the ejector 5 ,

along its generatrix over the entire height of the ejector 5, equidistant from the inlets of the latter and from each other. The mixing chamber 1 is made in the form of a removable module.

The static jet mixer works as follows: the main part of the water flow enters the teardrop-shaped mixing chamber 1 through its rectangular windows 3, located frontally with respect to the direction of movement of the water flow with a decrease in their area from the center to the periphery.

The decrease in the area of the input rectangular windows 3 of the mixing chamber 1 is due to a decrease in the flow rate from the center to the walls of the pipeline.

The other part of the stream goes around the mixing chamber 1 on both sides.

Through the tube for introducing reagent 2 with perforation located on the frontal surface with respect to the stream of purified water and increasing in height from the center of the tube 2 to the periphery, the latter is fed to the ejector 5 located coaxially with the perforated tube 2.

This perforation allows you to achieve the most complete mixing of the reagent with water already in the ejector 5. The pitch of the holes of the perforation of the tube 2 increases in height from the center to the periphery for a more efficient distribution of the reagent inside the ejector 5.

In the ejector 5, the water stream enters through inlets 6 located opposite the frontal windows for water input 3 of the mixing chamber 1. The reagent stream, directed towards the movement of the main part of the water stream, contributes to the process of intensive mixing in the ejector 5; the resulting mixture of water and reagent extends beyond the ejector 5 through symmetrical openings for the exit of the mixture of water and reagent 7 located on the side surfaces of the ejector 5 along its generatrix and equidistant from

inlets of the latter and from each other. This mixture is picked up by the streams of water entering the mixing chamber 1 through its inlet windows 3, enveloping the ejector 5, each on its own side; the mixing process continues as a result of the formation of vortex hydrodynamic flows in the narrowed zone of the mixing chamber 1. Next, each of the flows of a mixture of water with reagent through holes 4 for the exit of the formed mixture from the mixing chamber 1, located on the side surfaces of the chamber along its generatrix along the entire height of the chamber goes beyond it and goes around the last on both sides. The teardrop-shaped shape of the mixing chamber 1 contributes to the creation of zones of reduced pressure on its lateral surfaces. Water flowing through the pipeline and enveloping mixing chamber 1 from both sides due to reduced pressure on its lateral surfaces “sucks” the mixture of water and reagent from mixing chamber 1, thus ending the entire mixing process.

The implementation of the mixing chamber 1 in the form of a removable cartridge placed in the pipeline improves the operating conditions of the structure, as it facilitates its repair, cleaning of accumulated contaminants and complete replacement if necessary.

The proposed static jet mixer in comparison with the known one provides an increase in the degree of mixing of water and reagent by equipping the mixing chamber:

• a central ejector with a certain orientation of the inlet and outlet openings in relation to the flows of the treated water, providing an additional stage of mixing;

• the forms of execution of the entrance windows and the ratio of their areas, which provide, along with the cylindrical shape of the ejector and the drop-like shape of the chamber itself, the oncoming movement of water flows and, as

consequence, the intensification of the process of mixing it with the reagent;

• Peculiarities of performing perforation of the tube for feeding the reagent — by positioning it on the frontal surface with respect to the stream of purified water with a step increasing in height from the center of the tube to the periphery.

The proposed static jet mixer in comparison with the known provides:

• increasing the efficiency of mixing water with a reagent up to 98.5-99%.

• reduction of reagent consumption due to the intensification of the mixing process, preventing reagent losses by at least 30%.

Claims (1)

A static jet mixer comprising a drop-shaped tube-shaped mixing chamber placed in the stream, equipped with water inlet openings located frontally with respect to the flow direction along the mixing chamber generatrix, and water-reagent mixture outlet openings located on the side surfaces along the generatrix, and a central perforated tube for introducing a reagent, characterized in that the mixing chamber placed in the pipeline is equipped with an ejector, a coaxial tube for introducing a reagent, an ejector It is filled with openings for entering water into it, located opposite the front openings of the mixing chamber, and symmetrical openings for discharging a mixture of water and reagent, located on the side surfaces along the generatrix along the entire height of the ejector, equidistant from the inlet openings of the latter and from each other, while the central the inlet holes of the mixing chamber are made in the form of rectangular windows with a decrease in their areas from the center to the periphery, the perforation of the tube for introducing the reagent is located on the front of the eye with respect to the flow surface water with a step increasing in height from the center of the tube to the periphery, and the mixing chamber is made in the form of a removable module placed in the pipeline.