CN109499411B - Venturi tube capable of being secondarily mixed - Google Patents
Venturi tube capable of being secondarily mixed Download PDFInfo
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- CN109499411B CN109499411B CN201910029573.XA CN201910029573A CN109499411B CN 109499411 B CN109499411 B CN 109499411B CN 201910029573 A CN201910029573 A CN 201910029573A CN 109499411 B CN109499411 B CN 109499411B
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- injection
- tube
- cross flow
- pipe
- venturi
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- 238000002347 injection Methods 0.000 claims abstract description 165
- 239000007924 injection Substances 0.000 claims abstract description 165
- 239000007788 liquid Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 30
- 230000000694 effects Effects 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005235 decoking Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3123—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a venturi tube capable of being secondarily mixed, which comprises a venturi tube, a secondary mixing injection tube, an injection inlet, an injection outlet, an injection-cross flow connecting rod, a cross flow straight tube, a cross flow venturi tube and a shrinkage injection tube. The secondary mixing injection pipes are respectively and tightly fixed on four injection holes at the throat part of the venturi pipe, and the outer pipe walls of the four injection inlets are tightly matched with the inner walls of the injection holes, so that the whole secondary mixing venturi pipe is formed, and the secondary mixing of the cross flow fluid in the venturi pipe and the jet flow fluid outside the venturi pipe is realized at the throat part of the venturi pipe by means of the secondary mixing injection pipes. The invention can realize the secondary injection mixing of the fluid in the venturi tube, increase the turbulent flow intensity of the mixing area and achieve the effect of fully and uniformly mixing the cross flow and the jet flow.
Description
Technical Field
The invention relates to the technical field of venturi tubes, in particular to a venturi tube capable of being mixed secondarily.
Background
The venturi ejector is a high-efficiency fluid mechanical device which accelerates the mixing process by generating adsorption near high-speed fluid by utilizing the principle of venturi effect, thereby accelerating the reaction speed, and is widely applied to various industries of national production.
For rapid reactions, the mixing of the reactants is decisive for the rate of progress of the reaction. The venturi ejector is used as high-efficiency mixing equipment, and in the fields of emulsion preparation, agricultural fertilization, fuel gas decoking and the like, the mixing effect of the internal fluid medium directly influences the working efficiency, but the conventional primary ejection mixing cannot achieve uniform and full mixing effect, so that the venturi ejector capable of realizing secondary mixing becomes one of research hot spots in the field.
Disclosure of Invention
The invention mainly solves the technical problem of providing a venturi tube capable of being secondarily mixed, which can achieve the effect of secondary mixing after primary mixing of cross flow and jet flow in the venturi tube, so that injection fluid and working fluid in the venturi tube are fully and uniformly mixed.
In order to solve the technical problems, the invention adopts a technical scheme that:
the venturi tube capable of being secondarily mixed comprises a venturi tube 1, a secondary mixing injection tube a2, a secondary mixing injection tube b3, a secondary mixing injection tube c4 and a secondary mixing injection tube d5, wherein the throat of the venturi tube is provided with four injection holes; the four secondary mixing injection pipes are completely identical in structure, the secondary mixing injection pipe a2 is taken as an example for introduction, and the secondary mixing injection pipe b3, the secondary mixing injection pipe c4, the secondary mixing injection pipe d5 are completely identical in structure with the secondary mixing injection pipe a2, and are not repeated. The secondary mixing injection pipe a2 comprises an injection inlet 21, an injection outlet 22, an injection-cross flow connecting rod 23, a cross flow straight pipe 24 and a cross flow venturi pipe 25; wherein the cross flow venturi 25 comprises a convergent type injection pipe a251, a convergent type injection pipe b252, a convergent type injection pipe c253 and a convergent type injection pipe d254. The secondary mixing injection pipe a2, the secondary mixing injection pipe b3, the secondary mixing injection pipe c4 and the secondary mixing injection pipe d5 are respectively and tightly fixed on four injection holes of the throat part of the venturi tube 1, and the outer pipe walls of the four injection inlets are tightly matched with the inner walls of the injection holes, so that the whole venturi tube capable of being secondarily mixed is formed.
The venturi tube 1 is a complete venturi tube, four circular injection holes are formed in the circumferential direction of the outer wall of the throat part at intervals of 90 degrees, and the position of each hole is located at the quarter point of the generatrix of the outer wall of the throat part.
The tail end of the injection inlet 21 is connected with a right-angle bent tubular injection outlet 22, the lower end of the injection outlet 22 is connected with a cross flow straight pipe 24 through a solid injection-cross flow connecting rod 23, and the tail end of the cross flow straight pipe 24 is connected with a cross flow venturi tube 25; the inner diameter of the ejection hole of the throat part of the venturi tube 1, the outer diameter of the ejection inlet 21, the outer diameter of the ejection outlet 22, the outer diameter of the ejection-cross flow connecting rod 23, the outer diameter of the cross flow straight tube 24 and the outer diameter of the cross flow venturi tube 25 are the same; the inner pipe diameter of the injection inlet 21, the inner pipe diameter of the injection outlet 22, the inner pipe diameter of the cross flow straight pipe 24 and the diameter of the inner circular surface of the diverging section outlet of the cross flow venturi pipe 25 are the same.
The throat part of the cross flow venturi tube 25 is connected with a shrinkage type injection tube a251, a shrinkage type injection tube b252, a shrinkage type injection tube c253 and a shrinkage type injection tube d254; the four shrinkage type injection pipes have the same structure and are circumferentially distributed at equal 90-degree angular intervals, the part positioned outside the transverse flow venturi pipe 25 is bucket-shaped, the part connected with the transverse flow venturi pipe 25 is a cylindrical pipe, and each shrinkage type injection pipe is communicated with the throat part of the transverse flow venturi pipe 25.
The secondary mixing injection pipe a2 can perform secondary mixing of jet flow and cross flow in the venturi tube 1, namely, jet flow enters the throat of the venturi tube 1 through the injection inlet 21 and flows out of the venturi tube through the injection outlet 22 to be mixed with the cross flow in the tube for the first time, the cross flow at the front section of the throat of the venturi tube 1 enters the cross flow venturi tube 25 after passing through the cross flow straight tube 24, and secondary mixing is completed between the throat of the cross flow venturi tube 25 and the primary mixed liquid injected by each shrinkage injection tube. The working processes of the secondary mixing injection pipe b3, the secondary mixing injection pipe c4 and the secondary mixing injection pipe d5 are identical to those of the secondary mixing injection pipe a2, and are not repeated.
The upper pipe sections of the shrinkage type injection pipe a251, the shrinkage type injection pipe b252, the shrinkage type injection pipe c253 and the shrinkage type injection pipe d254 in the cross flow venturi tube 25 are bucket-shaped, and the lower parts of the shrinkage type injection pipes are connected with the straight pipe sections, so that the cross flow venturi tube can be used as a turbulence piece to promote the full mixing of cross flow-jet flow.
The beneficial effects of the invention are as follows:
according to the venturi tube capable of being secondarily mixed, the secondary mixing injection tube is additionally arranged in the throat part of the venturi tube, secondary injection mixing is carried out on the basis that primary injection mixing of jet fluid and cross fluid is completed, and the mixing effect in the tube is improved; the shrinkage type injection pipe outside the throat part of the secondary mixing injection pipe is used as a turbulence piece, so that the turbulence intensity in the throat part of the venturi pipe is increased, and the full and uniform mixing of cross flow and jet flow is promoted.
Drawings
FIG. 1 is a three-dimensional view of a secondary mixing venturi of the present invention;
FIG. 2 is a front view of a secondary mixing venturi of the present invention;
FIG. 3 is a three-dimensional cross-sectional view of a secondary mixing venturi of the present invention, taken along the cross-sectional line in the front view;
FIG. 4 is a cross-sectional view of a secondary mixing venturi of the present invention, taken along the cross-sectional line in the front view;
FIG. 5 is a front cross-sectional view of a secondary mixing venturi of the present invention;
FIG. 6 is a three-dimensional view of a secondary mixing eductor in a secondary mixable venturi of the present invention;
FIG. 7 is a front view of a secondary mixing eductor in a secondary mixable venturi of the present invention;
FIG. 8 is a side view of a secondary mixing eductor in a secondary mixable venturi of the present invention;
FIG. 9 is a side cross-sectional view of a secondary mixing jet in a secondary mixing venturi of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings and detailed description so that advantages and features of the present invention can be more readily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
The invention discloses a venturi tube capable of being secondarily mixed, which comprises a venturi tube 1, a secondary mixing injection tube a2, a secondary mixing injection tube b3, a secondary mixing injection tube c4 and a secondary mixing injection tube d5. Taking the secondary mixing injection pipe a2 as an example, the secondary mixing injection pipe b3, the secondary mixing injection pipe c4 and the secondary mixing injection pipe d5 are identical to the secondary mixing injection pipe a2 in structure, and are not repeated. The secondary mixing injection pipe a2 comprises an injection inlet 21, an injection outlet 22, an injection-cross flow connecting rod 23, a cross flow straight pipe 24 and a cross flow venturi pipe 25; the cross flow venturi 25 includes a convergent type injection pipe a251, a convergent type injection pipe b252, a convergent type injection pipe c253, and a convergent type injection pipe d254.
As a preferred embodiment of the invention, as shown in figures 1 and 2, a venturi tube 1 is horizontally placed, a secondary mixing injection tube a2, a secondary mixing injection tube b3, a secondary mixing injection tube c4 and a secondary mixing injection tube d5 are respectively and tightly fixed on four injection holes of the throat part of the venturi tube 1, the outer tube walls of the four injection inlets are tightly matched with the inner walls of the injection holes, and the straight tube openings of the injection inlets extend out of the throat part of the venturi tube 1 for being connected with jet media, so that the effect shown in figure 1 is achieved, and the whole secondary mixing venturi tube is formed. The positions of the secondary mixing injection pipes in the throat part of the venturi tube 1 are shown in fig. 3 and 4, the secondary mixing injection pipe a2 and the secondary mixing injection pipe c4 are fixed in the throat part of the venturi tube 1 along the vertical direction, the secondary mixing injection pipe b3 and the secondary mixing injection pipe d5 are fixed in the throat part of the venturi tube 1 along the horizontal direction correspondingly, and the distances between the axes of the cross flow venturi tubes on the secondary mixing injection pipes and the axes of the venturi tubes 1 are equal.
Referring to fig. 5, 6, 7, 8 and 9, the working processes of the secondary mixing injection pipe a2, the secondary mixing injection pipe b3, the secondary mixing injection pipe c4 and the secondary mixing injection pipe d5 are identical and limited in space, the secondary mixing injection pipe a2 is taken as an illustration of the secondary mixing process of cross flow-jet flow in the whole venturi tube, low pressure is formed when the cross flow fluid in the venturi tube 1 flows to the throat through the inlet of the left diverging section, the jet flow fluid flows into the throat of the venturi tube 1 through the injection inlet 21 under the action of internal and external pressure differences, and flows out through the injection outlet 22, so that primary mixing with the cross flow fluid in the venturi tube 1 is realized. The partial cross flow fluid at the front section of the throat part of the venturi tube 1 flows through the cross flow straight tube 24 and then enters the cross flow venturi tube 25, and when flowing to the throat part of the cross flow venturi tube 25, low pressure is formed, and secondary mixing is completed with primary mixed liquid and cross flow liquid ejected by each shrinkage ejection tube, so that secondary mixing of the cross flow fluid and jet flow fluid in the whole venturi tube is realized, and the mixing effect is more fully and uniformly achieved.
As shown in FIG. 1, the venturi tube 1 is a conventional circular section venturi tube, four circular injection holes are formed along the circumferential direction of the outer wall of the throat at intervals of 90 degrees, and the position of each hole is positioned at a tetrad point on a generatrix of the outer wall of the throat, which is close to the inlet of the diverging section of the venturi tube 1.
The secondary mixing injection pipe a2, the secondary mixing injection pipe b3, the secondary mixing injection pipe c4 and the secondary mixing injection pipe d5 have the same structure. As shown in fig. 6, 7, 8 and 9, taking the secondary mixing injection pipe a2 as an example, it mainly comprises an injection inlet 21, an injection outlet 22, an injection-cross flow connecting rod 23, a cross flow straight pipe 24 and a cross flow venturi pipe 25. The injection inlet 21 is a straight circular tube, the tail end of the injection inlet is connected with the injection outlet 22, the injection outlet 22 is a right-angle bent circular tube, the injection-cross flow connecting rod 23 is a solid circular rod, the lower end of the injection outlet 22 is connected with the cross flow straight tube 24 through the injection-cross flow connecting rod 23, the cross flow straight tube 24 is a straight circular tube, and the tail end of the cross flow straight tube is connected with the cross flow venturi tube 25. The throat part of the transverse flow venturi tube 25 is connected with a shrinkage type injection tube a251, a shrinkage type injection tube b252, a shrinkage type injection tube c253 and a shrinkage type injection tube d254; the four shrinkage type injection pipes have the same structure and are distributed at equal angular intervals (90 degrees) in the circumferential direction, the part positioned outside the transverse flow venturi pipe 25 is bucket-shaped, the part connected with the transverse flow venturi pipe 25 is a cylindrical pipe, and each shrinkage type injection pipe is communicated with the throat part of the transverse flow venturi pipe 25. The inner diameter of the ejection hole of the throat part of the venturi tube 1, the outer diameter of the ejection inlet 21, the outer diameter of the ejection outlet 22, the outer diameter of the ejection-cross flow connecting rod 23, the outer diameter of the cross flow straight tube 24 and the outer diameter of the cross flow venturi tube 25 are the same; the inner pipe diameter of the injection inlet 21, the inner pipe diameter of the injection outlet 22, the inner pipe diameter of the cross flow straight pipe 24 and the diameter of the inner circular surface of the diverging section outlet of the cross flow venturi pipe 25 are the same.
For the industries of emulsion preparation, agricultural fertilization, fuel gas decoking and the like, the mixing effect of fluid media in the venturi ejector directly influences the production and working efficiency, but the conventional primary ejection mixing is insufficient and uniform in fluid media mixing.
In the venturi tube capable of being mixed secondarily, the cross flow fluid and the jet flow fluid in the venturi tube 1 are subjected to the venturi effect to be mixed once at the throat, but the turbulence intensity of a flow field in a primary mixing area is smaller, and the cross flow fluid and the jet flow fluid are not completely mixed. After the cross flow fluid is affected by the Venturi effect, part of the fluid forms low pressure when flowing to the throat part of the cross flow venturi tube 25, and secondary mixing is completed by the low pressure and primary mixed liquid and cross flow liquid outside the throat part of the cross flow venturi tube 25 ejected by each shrinkage type ejecting tube, the throat section of the cross flow venturi tube 25 is smaller, the turbulence intensity of the mixed area in the throat part is larger, each bucket-shaped shrinkage type ejecting tube outside the throat part plays the role of a turbulence piece, the turbulence intensity of an external flow field is increased, thus the secondary mixing of the cross flow fluid and the jet flow fluid in the whole venturi tube is realized, the primary mixing effect is improved, and the mixing and mixing of the cross flow fluid and the jet flow fluid in the tube are more fully and uniformly.
In summary, the venturi tube throat is additionally provided with the secondary mixing injection pipe, so that the secondary injection mixing is performed on the basis that the primary injection mixing of jet fluid and cross-flow fluid is completed, and the aim of improving the mixing effect is achieved; the shrinkage type injection pipe outside the throat part of the secondary mixing injection pipe is used as a turbulence piece, so that the turbulence intensity in the throat part of the venturi pipe is increased, and the cross flow and jet flow are mixed more fully and uniformly.
Claims (2)
1. A secondarily mixable venturi, characterized by: the device comprises a venturi tube (1) with four injection holes at the throat, a secondary mixing injection tube a (2), a secondary mixing injection tube b (3), a secondary mixing injection tube c (4) and a secondary mixing injection tube d (5); the venturi tube (1) is a complete venturi tube, four circular injection holes are formed in the outer wall of the throat part at intervals of 90 degrees in the circumferential direction, the position of each hole is located at a quarter point of a bus of the outer wall of the throat part, and the four secondary mixing injection tubes are completely identical in structure, wherein the secondary mixing injection tube a (2) comprises an injection inlet (21), an injection outlet (22), an injection-cross flow connecting rod (23), a cross flow straight tube (24) and a cross flow venturi tube (25); the cross flow venturi tube (25) comprises a shrinkage type injection tube a (251), a shrinkage type injection tube b (252), a shrinkage type injection tube c (253) and a shrinkage type injection tube d (254), and the throat part of the cross flow venturi tube (25) is connected with the shrinkage type injection tube a (251), the shrinkage type injection tube b (252), the shrinkage type injection tube c (253) and the shrinkage type injection tube d (254); the four shrinkage type injection pipes have the same structure and are circumferentially distributed at equal 90-degree angular intervals, the part positioned outside the transverse flow venturi pipe (25) is in a bucket shape, the part connected with the transverse flow venturi pipe (25) is a cylindrical pipe, and each shrinkage type injection pipe is communicated with the throat part of the transverse flow venturi pipe (25); the tail end of the injection inlet (21) is connected with a right-angle bent tubular injection outlet (22), the lower end of the injection outlet (22) is connected with a cross flow straight pipe (24) through a solid injection-cross flow connecting rod (23), and the tail end of the cross flow straight pipe (24) is connected with a cross flow venturi pipe (25); the inner diameter of the ejection hole of the throat part of the venturi tube (1), the outer diameter of the ejection inlet (21), the outer diameter of the ejection outlet (22), the outer diameter of the ejection-cross flow connecting rod (23), the outer diameter of the cross flow straight tube (24) and the outer diameter of the cross flow venturi tube (25) are the same; the inner pipe diameter of the injection inlet (21), the inner pipe diameter of the injection outlet (22), the inner pipe diameter of the cross flow straight pipe (24) and the inner circular surface diameter of the outlet of the diverging section of the cross flow venturi pipe (25) are the same; the secondary mixing injection pipe a (2), the secondary mixing injection pipe b (3), the secondary mixing injection pipe c (4) and the secondary mixing injection pipe d (5) are respectively and tightly fixed on four injection holes at the throat part of the venturi tube (1), and the outer pipe walls of the four injection inlets are tightly matched with the inner walls of the injection holes, so that the whole venturi tube capable of being secondarily mixed is formed.
2. A secondary mixing venturi according to claim 1, wherein: the secondary mixing injection pipe a (2) can perform secondary mixing of jet flow and cross flow in the venturi tube (1), namely jet flow enters the throat of the venturi tube (1) through the injection inlet (21) and flows out of the venturi tube through the injection outlet (22) to be mixed with the cross flow in the pipe once, the cross flow at the front section of the throat of the venturi tube (1) enters the cross flow venturi tube (25) through the cross flow straight tube (24) and completes secondary mixing with primary mixed liquid injected by each shrinkage injection tube at the throat of the cross flow venturi tube (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910029573.XA CN109499411B (en) | 2019-01-14 | 2019-01-14 | Venturi tube capable of being secondarily mixed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910029573.XA CN109499411B (en) | 2019-01-14 | 2019-01-14 | Venturi tube capable of being secondarily mixed |
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| Publication Number | Publication Date |
|---|---|
| CN109499411A CN109499411A (en) | 2019-03-22 |
| CN109499411B true CN109499411B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910029573.XA Active CN109499411B (en) | 2019-01-14 | 2019-01-14 | Venturi tube capable of being secondarily mixed |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026911B (en) * | 2019-05-27 | 2020-06-05 | 广州大学 | Feeding spray head for intensive grinding processing and material mixing method |
| CN114042389B (en) * | 2020-07-26 | 2024-01-19 | 西安交通大学 | Venturi mixing device with variable injection angle at throat |
| CN112899993A (en) * | 2021-01-19 | 2021-06-04 | 珠海格力电器股份有限公司 | Microbubble generating device, washing water inlet assembly and washing machine |
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| US6293294B1 (en) * | 1999-06-24 | 2001-09-25 | Hydrosurge, Inc. | Method and apparatus for fluid mixing and dispensing |
| CN103111213A (en) * | 2013-02-04 | 2013-05-22 | 西安交通大学 | Venturi mixer with special inserting tube |
| CN203061076U (en) * | 2013-02-04 | 2013-07-17 | 西安交通大学 | Multipoint introduction structure of Venturi mixer |
| CN103846026A (en) * | 2014-02-10 | 2014-06-11 | 西安交通大学 | Venturi mixer with adjustable shrinkage hole on throat |
| CN104028132A (en) * | 2014-05-22 | 2014-09-10 | 西安交通大学 | Venturi mixer with symmetrical inlet pipes at throat part |
| CN108067108A (en) * | 2016-11-15 | 2018-05-25 | 特达公司 | Liqiud-gas mixing device and its system |
| WO2018148305A1 (en) * | 2017-02-07 | 2018-08-16 | New Environmental Engineering, Inc. | Improved venturi apparatus and method of use |
| CN209005569U (en) * | 2019-01-14 | 2019-06-21 | 西安交通大学 | It is a kind of that secondary mixed Venturi tube may be implemented |
-
2019
- 2019-01-14 CN CN201910029573.XA patent/CN109499411B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293294B1 (en) * | 1999-06-24 | 2001-09-25 | Hydrosurge, Inc. | Method and apparatus for fluid mixing and dispensing |
| CN103111213A (en) * | 2013-02-04 | 2013-05-22 | 西安交通大学 | Venturi mixer with special inserting tube |
| CN203061076U (en) * | 2013-02-04 | 2013-07-17 | 西安交通大学 | Multipoint introduction structure of Venturi mixer |
| CN103846026A (en) * | 2014-02-10 | 2014-06-11 | 西安交通大学 | Venturi mixer with adjustable shrinkage hole on throat |
| CN104028132A (en) * | 2014-05-22 | 2014-09-10 | 西安交通大学 | Venturi mixer with symmetrical inlet pipes at throat part |
| CN108067108A (en) * | 2016-11-15 | 2018-05-25 | 特达公司 | Liqiud-gas mixing device and its system |
| WO2018148305A1 (en) * | 2017-02-07 | 2018-08-16 | New Environmental Engineering, Inc. | Improved venturi apparatus and method of use |
| CN209005569U (en) * | 2019-01-14 | 2019-06-21 | 西安交通大学 | It is a kind of that secondary mixed Venturi tube may be implemented |
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| CN109499411A (en) | 2019-03-22 |
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