CN113680228A

CN113680228A - Vortex type liquid disperser

Info

Publication number: CN113680228A
Application number: CN202111054571.XA
Authority: CN
Inventors: 陈国荣; 大森龙夫; 姜莉莉
Original assignee: Ningbo Huazhou Technology Co ltd
Current assignee: Pan Haiqing
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2021-11-23

Abstract

The invention discloses an eddy current type liquid disperser which is provided with a cylindrical inner cavity main body, wherein a main flow inlet is arranged at the axial front end of the inner cavity main body, an outlet is arranged at the axial rear end of the inner cavity main body, and the section diameter of the main flow inlet is smaller than that of the inner cavity main body; the branch inlet is arranged on the pipe wall of the disperser and is positioned at one end of the inner cavity main body close to the main flow inlet. Water enters from the main flow inlet and liquid medicine is added from the branch flow inlet, so that a vortex is generated at the connecting part of the main flow inlet, the branch flow inlet and the inner cavity main body, and the liquid medicine is thrown into the vortex area from the tangential direction of the bottom surface of the vortex area; an external bypass pipeline is utilized from the main stream waterway, a small part of water is shunted and converged with the liquid medicine to enter the vortex region from the branch inlet, the proportion of the main stream branch is more favorably adjusted to form vortex rotation, the liquid medicine is uniformly dispersed in the vortex region and enters the main stream from all directions of the section of the main stream, and the effects of continuity, uniformity and stable dispersion are achieved.

Description

Vortex type liquid disperser

Technical Field

The invention belongs to the technical field of chemical equipment, and particularly relates to a vortex liquid disperser for uniformly dispersing a trace amount of liquid in another liquid.

Background

In the chemical preparation process, different liquids are often required to be dispersed and mixed, for example, in the process of preparing hypochlorous acid water. The hypochlorous acid water is prepared by mixing sodium hypochlorite and hydrochloric acid, the concentration of the final product is very low, generally dozens to hundreds of ppm, the two reactants are solutions with very low concentrations, the reaction process is required to be continuous and uniform, and the pressure loss of the fluid is required to be reduced as much as possible, so the requirement on a liquid disperser is very high. As shown in fig. 8, the existing disperser is a venturi-tube structure, and includes a first inlet 81, a second inlet 82, and a first outlet 83, which can better achieve uniform addition of the liquid medicine, but because the cross section of the pipeline flow path needs to be greatly reduced to form a small-diameter flow path 84, the flow path resistance is increased, the throughput of the equipment is limited to a certain extent, and the addition of the liquid medicine is intermittent with respect to water flow, which is not favorable for uniform time.

Disclosure of Invention

It is an object of the present invention to provide a more uniform and stable liquid dispenser.

Therefore, the invention adopts the technical scheme that: the vortex type liquid disperser is provided with a cylindrical inner cavity main body, a main flow inlet is arranged at the axial front end of the inner cavity main body, an outlet is arranged at the axial rear end of the inner cavity main body, and the section diameter of the main flow inlet is smaller than that of the inner cavity main body; the method is characterized in that: the branch inlet is arranged on the pipe wall of the disperser and is positioned at one end of the inner cavity main body close to the main flow inlet.

The pipe wall at the main flow inlet extends inwards and extends into the inner cavity main body to form an annular wall for blocking a flow path of the branch flow inlet; the annular wall blocks at least 1/2 of the inner diameter of the branch inlet.

An external bypass pipeline is arranged between the main flow inlet and the branch flow inlet and used for distributing the flow of part of the main flow inlet to the branch flow inlet, and the part of the flow can be 1-10% of the flow of the main flow inlet.

The length of the disperser is 2-4 times of the diameter of the inner cavity body of the disperser; the diameter of the main body of the inner cavity is 1.5 to 3 times of the diameter of the main flow inlet.

According to the disperser disclosed by the invention, water enters from the main flow inlet and liquid medicine is added from the branch flow inlet, so that a vortex is generated at the joint of the main flow inlet, the branch flow inlet and the inner cavity body, and the liquid medicine is fed to the vortex area from the tangential direction of the bottom surface of the vortex area; an external bypass pipeline is utilized from the main stream waterway, a small part of water is shunted and converged with the liquid medicine to enter the vortex region from the branch inlet, the proportion of the main stream branch is more favorably adjusted to form vortex rotation, the liquid medicine is uniformly dispersed in the vortex region and enters the main stream from all directions of the section of the main stream, and the effects of continuity, uniformity and stable dispersion are achieved.

Drawings

The following detailed description is made with reference to the accompanying drawings and embodiments of the present invention

FIG. 1 is a cross-sectional view of a first dispenser of the invention;

FIG. 2 is a schematic transverse cross-section of a first disperser according to the invention;

FIG. 3 is a cross-sectional view of a second dispenser of the invention;

FIG. 4 is a structural cross-sectional view of the mixer of the present invention;

FIG. 5 is a view of the transverse section of FIG. 4 rotated 90;

FIG. 6 is a schematic view of a machine for producing a high concentration aqueous hypochlorous acid in example 1;

FIG. 7 is a schematic view of a machine for producing a high concentration aqueous hypochlorous acid in example 2;

fig. 8 is a structural sectional view of a prior art dispenser.

Labeled as: the device comprises a disperser 1, an inner cavity body 2, a main flow inlet 3, a branch flow inlet 4, an outlet 5, an external bypass pipeline 6, a vortex region 7, a vortex 8, a liquid medicine 9, a centripetal flow 10, a main flow line 11, a rotational flow 12, a main flow water body 13, a liquid medicine-water confluence pipe fitting 14, an annular wall 15, a clear water flow divider 16, a mixer 17, a first mixer 171, a second mixer 172, a third mixer 173, a first baffle 18, a second baffle 19, a main water flow 20, a reverse flow 21, a liquid medicine metering pump 22, a flow dividing pipe 23, a confluence pipe 24 and a branch pipe 25;

a first inlet 81, a second inlet 82, a first outlet 83, a small pipe flow path 84.

Detailed Description

As shown in fig. 1 and 2, the disperser 1 has a cylindrical inner cavity body 2 for dispersing different liquids, and the inner cavity body is provided with a main flow inlet 3, a branch flow inlet 4 and an outlet 5 which are communicated with the inner cavity; the main flow inlet 3 is arranged at the axial front end of the inner cavity main body 2, the outlet 5 is arranged at the axial rear end of the inner cavity main body 2, and the section diameter of the main flow inlet 3 is smaller than that of the inner cavity main body 2; the branch inlet 4 is arranged on the pipe wall of the disperser 1 and is positioned at one end of the inner cavity main body close to the main flow inlet. A liquid medicine metering pump 22 is arranged in front of the branch inlet 4.

An external bypass pipeline 6 is arranged between the main stream inlet 3 and the branch inlet 4, and a clear water flow divider 16 is arranged on the external bypass pipeline 6 and is used for distributing partial flow of the main stream inlet 3 to the branch inlet 4, wherein the partial flow can be 1-10% of the flow of the main stream inlet. The diameter of the shunt pipe can be selected to adjust the flow, and a manual adjusting valve can be arranged on the external bypass pipeline 6 to adjust the flow.

When the main flow water body 13 (clear water) enters the inner cavity main body 2 of the disperser 1 through the main flow inlet 3, the flow velocity change is large because of the sharp expansion of the flow path section, and a negative pressure vortex area 7 is generated near the section change area, so that a vortex 8 is generated. The liquid medicine 9 injected from the branch inlet 4 is positioned in the tangential direction of the circular section at the bottom of the vortex region, and the liquid medicine is stirred and diffused by the vortex 8 to form centripetal flow 10, enters the main flow line 11, is further diffused and mixed, and flows out from the outlet 5 of the inner cavity main body to enter a subsequent pipeline.

The flow is small, and the intermittent liquid medicine 9 is continuously circulated and diluted in the vortex to form a uniform and continuous liquid medicine flow which enters a main flow water body (clear water) to achieve the effect of uniform mixing. In order to promote the vortex 8 to form a rotating flow 12 in the vertical direction relative to the main flow in the bottom vortex region 7, the liquid medicine 9 enters the main flow water body from the outer side of the main flow water body through the centripetal flow 10, and the mixing effect of the liquid medicine can be further improved and ensured.

An external bypass pipeline 6 is arranged between the main stream inlet 3 and the branch stream inlet 4, so that a small part of main stream water 13 (clear water) and the liquid medicine 9 are converged in a liquid medicine-water converging pipe fitting 14 in front of the branch stream inlet 4 and flow into the vortex region 7. Under the pushing action of the interfluent water body, the vortex region 7 can form a rotating flow 12 in the vertical direction relative to the main flow water body 13. Because the pressure of the vortex area 7 is negative pressure relative to the main flow water body of the inner cavity body 2, a flow splitting water body is easily formed, the entering direction is the tangential direction of the vortex vertical to the bottom of the vortex area, and the vortex rotational flow 12 is naturally generated.

As shown in fig. 3, in order to further promote the formation of the vortex and the rotational flow of the vortex, the pipe wall at the main flow inlet 3 extends inwards and extends into the inner cavity main body 2 to form an annular wall 15 blocking the branch flow inlet flow path; the annular wall 15 blocks at least 1/2 of the inner diameter of the branch inlet 4.

The reducer pipes at the main part of the inner cavity and the outlet are processed and assembled by adopting a bonding method through adopting standard plastic pipes and plastic pipe fittings which are easy to obtain and low in price.

As shown in fig. 4 and 5, the mixer 17 has a cylindrical inner cavity, and a plurality of semicircular baffles perpendicular to the cylindrical axis are fixed on the inner wall of the mixer and divided into a first baffle 18 and a second baffle 19, the first baffle 18 and the second baffle 19 are fixed on the upper end and the lower end of the inner wall of the mixer in a staggered manner, and the distance between the baffles is consistent. The adjacent first and

second baffles

18 and 19 are complementary in their circumferential positions, i.e. their projections on their axes merge into a complete circle. The mixer can be horizontally arranged or vertically arranged, and when the mixer is horizontally arranged, the straight edge of the baffle is in the vertical direction. The distance between two adjacent baffles is 0.2-0.6 times of the inner diameter of the mixer; the number of baffles is even, i.e. the number of first baffles 18 and second baffles 19 is the same. The inner diameter of the outer tube of the mixer 17 is 1.5 to 3 times the inner diameter of the main flow tube (the inner diameter of the main flow tube before flowing into the mixer).

After entering the mixer 17, the main water flow 20 mixed by the chemical liquid and the clear water flows through the flow path formed by the first baffle 18, the second baffle 19 and the inner wall of the mixer, flows out of the mixer 17 and enters the subsequent pipeline. At this time, when the flow direction of the water flow is changed, the inertial force of the fluid and the reaction force of the wall surface of the flow path are received, the reverse flow 21 is generated on the front wall surface of the flow path, and at the same time, the reverse flow 21 and the main water flow 20 which normally flows generate collision and turbulent flow, so that the spreading and mixing of the chemical liquid are obtained. Because the water flow changes the flow direction of 180 degrees in front and back (up and down) of the first baffle plate 18 and the second baffle plate 19, the generated inertia force and reaction force are large, the collision of the main water flow 20 and the reverse flow 21 is violent, the turbulent flow and diffusion are generated, meanwhile, the bending flow (short circuit) is difficult to generate, and the stable and efficient mixing effect is achieved. The first baffle 18 and the second baffle 19 in the mixer 17 are cut and separated by the central line of the outer sleeve of the mixer 17, when the mixer is transversely arranged, because the highest point in the sleeve is a part of the flow path, the gas can not be trapped and gathered, and the mixing effect is safer and more stable. The axial marking of the mixer 17 is easily done (e.g. by drawing an arrow or scoring the outside axial tip of the sleeve of the mixer 17 during assembly, etc.) and can be marked when the mixer 17 is to be placed laterally in the apparatus. Therefore, the mixer is arranged in the equipment vertically and horizontally, and the entrapment and the accumulation of gas in the pipe can not be generated.

The mixer outer sleeve 17 is made of a standard plastic pipe, and the first baffle 18, the second baffle 19 and the connecting shaft inside the mixer outer sleeve are designed to be integrally processed (such as injection molding processing and one-step forming), so that the mixer outer sleeve is easy to process and convenient to assemble.

Example 1

As shown in fig. 6, the high-concentration hypochlorous acid water producing machine according to the present embodiment includes two dispersers 1 and three mixers 17. The two dispersers 1 are divided into two paths, the main flow inlets of the two dispersers 1 are connected with the two branches shunted by the shunt tubes 23, and the outlets of the two dispersers respectively pass through the second mixer 172 and the third mixer 173, are converged by the flow merging tube 24 and then flow to the first mixer 171.

After the clean water (tap water, etc.) flows into the shunt tube 23, the shunt flows to the two branch flow tubes 25, and the flow in the branch flow tubes automatically approaches to be consistent (the flow is different and does not bring influence) because the subsequent pipeline structures and lengths are basically the same. The disperser 1 is located on two symmetrical branches, one of which is taken as an example: after the clear water of the branch flow pipe 25 is shunted by the clear water shunt 16, the main flow clear water flows into the disperser 1, the liquid medicine (sodium hypochlorite or hydrochloric acid) is pressed into the liquid medicine-clear water flow junction pipe 14 by the liquid medicine metering pump 22 to be mixed with a small amount of clear water shunted by the clear water shunt 16 and then flows into the disperser 1, the liquid medicine and the clear water are mixed on the disperser 1 and then flow into the second mixer 172, the mixed water of the liquid medicine and the clear water is further mixed uniformly in the second mixer 172 under the action of inertia and turbulent flow collision, and then flows into the two liquid flow junction pipes 24 through the branch flow pipe; similarly, after the other path of clear water and the liquid medicine are subjected to the same mixing process, the mixed water of the liquid medicine and the clear water enters the two liquid confluence pipe 24; the two liquids join at the junction pipe 24, and then flow into the first mixer 171, where they are finally mixed and discharged. And a pH meter sensor is arranged at the tail end of the water discharge pipeline, the signal of the pH sensor is transmitted to a logic controller, and the logic controller adjusts and controls the addition amount of the hydrochloric acid solution according to the set concentration and the corresponding pH value, the water flow of the system and the current pH value signal to reach the set pH value.

Example 2

As shown in fig. 7, the high-concentration hypochlorous acid water producing machine according to the present embodiment includes two dispersers 1 and one mixer 17. The two dispersers 1 are divided into two paths, the main flow inlets of the two dispersers 1 are connected with the two branches after the shunt tubes 23 are shunted, and the outlets of the two dispersers are converged by the flow merging tube 24 and then flow to the mixer 17.

After the clean water (tap water, etc.) flows into the shunt tube 23, the shunt flows to the two branch flow tubes 25, and the flow in the branch flow tubes automatically approaches to be consistent (the flow is different and does not bring influence) because the subsequent pipeline structures and lengths are basically the same. The disperser 1 is located on two symmetrical branches, one of which is taken as an example: after the clear water of the branch flow pipe 25 is shunted by the clear water shunt 16, the main clear water flows into the disperser 1, the liquid medicine (sodium hypochlorite or hydrochloric acid) is pressed into the liquid medicine-clear water flow converging pipe 14 by the liquid medicine metering pump 22 and mixed with a small amount of clear water shunted by the clear water shunt 16 and then flows into the disperser 1, and the liquid medicine and the clear water are mixed on the disperser 1 and then enter the two liquid flow converging pipes 24; similarly, after the other path of clear water and the liquid medicine are subjected to the same mixing process, the mixed water of the liquid medicine and the clear water enters the two liquid confluence pipe 24; the two liquids join at the joining pipe 24, and then flow into the mixer 17, where they are finally mixed and discharged. And a pH meter sensor is arranged at the tail end of the water discharge pipeline, the signal of the pH sensor is transmitted to a logic controller, and the logic controller adjusts and controls the addition amount of the hydrochloric acid solution according to the set concentration and the corresponding pH value, the water flow of the system and the current pH value signal to reach the set pH value.

The two combined mixing systems of the embodiment 1 and the embodiment 2 can satisfy the effect of stable mixing. However, the system of example 1 tends to be somewhat more stable and is suitable for use in applications requiring more stringent requirements, such as in a chemical liquid mixing system. When the mixer is actually used in a hypochlorous acid water making machine, the total length of the inertial turbulent mixer can be shortened.

Claims

1. The vortex type liquid disperser is provided with a cylindrical inner cavity main body, a main flow inlet is arranged at the axial front end of the inner cavity main body, an outlet is arranged at the axial rear end of the inner cavity main body, and the section diameter of the main flow inlet is smaller than that of the inner cavity main body; the method is characterized in that: the branch inlet is arranged on the pipe wall of the disperser and is positioned at one end of the inner cavity main body close to the main flow inlet.

2. The vortex liquid disperser of claim 1, wherein: the pipe wall at the main flow inlet extends inwards and extends into the inner cavity main body to form an annular wall for blocking a flow path of the branch flow inlet; the annular wall blocks at least 1/2 of the inner diameter of the branch inlet.

3. The vortex liquid disperser of claim 1, wherein: an external bypass pipeline is arranged between the main flow inlet and the branch flow inlet and used for distributing the flow of part of the main flow inlet to the branch flow inlet, and the part of the flow can be 1-10% of the flow of the main flow inlet.

4. The vortex liquid disperser of claim 1, wherein: the length of the disperser is 2-4 times of the diameter of the inner cavity body of the disperser; the diameter of the main body of the inner cavity is 1.5 to 3 times of the diameter of the main flow inlet.