CN105664749A - Triangular pipe wall blade type static mixer - Google Patents
Triangular pipe wall blade type static mixer Download PDFInfo
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- CN105664749A CN105664749A CN201610136778.4A CN201610136778A CN105664749A CN 105664749 A CN105664749 A CN 105664749A CN 201610136778 A CN201610136778 A CN 201610136778A CN 105664749 A CN105664749 A CN 105664749A
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- static mixer
- tube wall
- blade
- cylinder
- triangle tube
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- 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
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
Abstract
The invention discloses a triangular pipe wall blade type static mixer.The triangular pipe wall blade type static mixer comprises a unit section cylinder and blades fixedly installed on the inner wall of the cylinder.The blades are triangular pipe wall blades formed by cutting the cylinder, and the three triangular pipe wall blades are evenly distributed on the inner wall at 120 degrees and are used for separating fluid materials into three rough incompletely-cutoff zones.The triangular pipe wall blade type static mixer is good in mixing effect, easy to manufacture, capable of saving energy, not likely to hook fiber fluid materials and convenient to clean.
Description
Technical field
The present invention relates to a kind of static mixer, be specifically related to a kind of triangle tube wall vane static mixer.
Background technology
Background: produce at the procedure using fluid foods as processing object, in many commercial production such as wastewater treatment and association area, except main fluid material, it is necessary to add adjuvant and other chemicals. Along with improving constantly and the development of science and technology of every profession and trade product variety and qualitative performance requirements, no matter more and more in quantity or kind various adjuncts are. Therefore it is necessary to utilize certain mixing arrangement or equipment to realize the mixing of the multiphase flow such as liquid-liquid, gas one liquid. Commercial production utilize turbulent closure scheme mechanism realize the equipment of these multiphase flows mixing, predominantly organic tool stirring mixing reactor, jet mixer, jet mixer, impinging streams mixer, static mixer, dynamic mixer etc. Different from traditional agitator device, although there is no moving component in static mixer, but rely on the initial kinetic energy that the momentum sources such as pump provide to make plan fluid-mixing pass sequentially through the static mixer with special construction, in very wide reynolds number range, realize the dispersion mixing and distribution mixing of different scale fluid well.
The pressure oscillation characteristic of static mixer, heat-transfer character, chaotic mixing characteristic and flow behavior, and in the distributed rendering strengthened between high viscosity fluid mixes, show the performance of brilliance with dispersion, thus obtain and pay close attention to widely, and it is used widely in the production process of large continuous, flow media with chemical industry characteristic.
But, on the one hand, due to industry-by-industry or specific to certain industry, because the fluid foods characteristic (such as molecular density characteristic, grey density characteristics, viscosity property etc.) of its production technology, processing is different, the requirement of static mixer is different, although some static mixer structure are capable of the full and uniform mixing of material, but affect or destroy original fluid foods characteristic; On the other hand, except realize Homogeneous phase mixing and protection by mixed material characteristic except, characteristics such as it is also contemplated that the saving energy and reduce the cost of static mixer itself, be prone to fabrication and processing, the volume of simple in construction, unit mixed is little.
Existing common static blender or mixing efficiency are undesirable, or energy consumption is high, hanging, or easy blocking, not easy cleaning etc. So, constantly research and development be more suitable for material special requirement purposes, more conform to fluid flow state, efficiently, low consumption, simple and compact for structure, be not easily blocked, be readily cleaned, be prone to processing and fabricating, the convenient static mixer of installation and repairing is that people are expected.
Purposes: static mixer not only has simple in construction, the advantage that running cost is low, and the fluid of any Reynolds number, any viscosity can be suitable for, the requirement of different mixing intensity can be met by changing hybrid element number simultaneously, good mixing effect, thus it is widely used in the technical processs such as liquid-liquid, liquid one air-liquid one be solid, the mixing of gas one gas, extraction, reaction.The technical processs such as the mixing in the fields such as papermaking, petrochemical industry, medicine, plastics, oils and fats, synthetic fibers, rubber, cosmetics, extraction, heat exchange, dispersion, dissolving can be used.
The usual structure of static mixer
As Typical Representative Kenics static mixer (KSM) of static mixer, being also called standard static blender, its hybrid element is the left-and-right spiral blade (see Fig. 1) of distortion 180 °. When the material stream that need to mix enters Kenics static mixer along pipeline, material stream is under the effect of himself kinetic energy, passing sequentially through and organize the specific channel that left and right screw element is alternately arranged more, now material stream realization under being forced the effect of " segmentation one shift-converges again " 3 key elements being repeatedly performed is sufficiently mixed; Particularly when turbulent flow, except " segmentation one displacement one converges again " 3 key elements, fluid produces violent secondary vortex flow in mobile section direction, thus causes that very strong shear action is in fluid, so that the discreet portions of fluid is divided further, and then realize strengthening mixing.
Up to the present, include the typical static mixer such as Kenics, SMX, SMV, SMXL, SH, hundreds of static mixer product existing and many patents both domestic and external, but according to authority's list of references and patent of invention inquiry, structure type is that KSM type, low-pressure type, SMV type, SMK type, SMXL type, ISG type, HEV type, IS50 type, IS45 type, CT type, SMR type and screw rod are rotating.
The technical problem underlying of existing static mixer and shortcoming:
From current occurred various static mixers both at home and abroad, substantially can realize allowing various fluid reach mixing purpose. But, as static mixer, in addition to ensuring that outside the Homogeneous phase mixing of the various fluid mechanics being mixed, the impact before and after mixing, material itself brought must also be considered, secondly furthermore the energy consumption (Pressure Drop) of the mixed process factor such as volume and cost after the fabrication and processing of consideration element, combination are considered.
Wherein KSM, low pressure, five kinds of types of HEV, IS45, CT hybrid element structure relatively easy, therefore, mixed process pressure drop is smaller; It addition, be not easily blocked in mixed process for higher concentration, relatively high viscosity or fiber trait fluid; And make relatively easy. The hybrid element structure relative complex of other several (SMV, SMK, SMXL, ISG, IS50, SMR, screw rod are rotating) type, although good mixing effect, but mixed process pressure drop is big, and easily blocks in mixed process for higher concentration, relatively high viscosity or fiber trait fluid; Wherein IS50 type spiral-shaped structure, processed complex, easy blocking etc. become apparent from.
The common deficiency that above ten kinds of type static mixers have is: one is, the various hybrid element such fluids of object paper pulp fiber, easily hanging on the pulp fiber inflow direction of element, or screw rod rotation type element not hanging but generation are blocked, during for higher concentration situation, both of these case becomes apparent from, thus makes troubles; Two are, various hybrid elements are all need special processing (not being the static mixer tube wall itself that has drawn from), process relative complex; Three are, move ahead process at fluid, and except segmentation (shunting), collaborating, the axially adjacent set of pieces anglec of rotation is substantially stationary (if KSM, low pressure, IS45, CT are 90 °; All the other are absent from the anglec of rotation).
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of triangle tube wall vane static mixer.
Technical scheme: for solving above-mentioned technical problem, triangle tube wall vane static mixer provided by the invention, save cylinder including unit and be fixedly mounted on the blade of cylinder inboard wall, described blade is to be cut, by cylinder, the triangle tube wall blade formed, three triangle tube wall blades be 120 ° uniform on inwall, three approximate region of not exclusively cutout mutually will be separated into for fluid foods.
Specifically, described triangle tube wall blade has base, and the vertical edges of described base vertical, and connects the arc limit of base and vertical edges end, and the axial line of described vertical edges and cut cylinder at grade, weld with cylinder inboard wall by described arc limit. Described arc limit is welded with cylinder inboard wall. During cutting, base originates from one section of circular arc on body end surface circle, vertical edges and the arc limit radial cuts each along cylinder, the facet (vertical, cambered surface) formed is all vertical with the wall of cut cylinder, the projection of the triangle tube wall blade that cutting is formed is triangle, launching backarc limit is a circular arc, and this circular arc just can be fitted with cylinder inboard wall, convenient welding.
Specifically, the arc length on described arc limit is that the cylinder week circular arc of 0.083～0.167 times is long;
Specifically, the cutting angle α of described triangle tube wall blade is 15 °～30 °.
Specifically, the tip initial welding contact connection angle β of described triangle tube wall blade is 0 °.
Specifically, described unit joint arranged in series, neighboring unit cells saves the oppositely oriented of blade.
Specifically, described unit joint arranged in series, oppositely oriented every two basic-unit section blades.
During use, while fluid foods moves axially, be subject to the guide functions of blade, formed in every piece of leaf area to cylinder inwall direction partially rotate to, move axially with to cylinder inwall direction partially rotate to combination, make three regional fluids form minor spiral eddy current and move ahead; When fluid is after blade base is left in left side, each region stream starts to converge, and makes bulk flow produce rotation around axle center under original respective inertia flow effect to move ahead flowing.
So, go successively in next blender basic-unit section, continue the next cycle separating gradually, rotating, converge. According to design needs, neighboring unit cells saves, or every two basic-unit sections, the rotation direction of blade is modified to reversely, is conducive to mixing.
Beneficial effect: the invention and existing various static mixer ratios, main advantage and effect:
1, with the same class vane static mixer ratio such as KSM, low pressure, ISG, IS45, CT, materials are directly taken from source material same with shell on the one hand, and materials are simple; On the other hand, being directly soldered to inside pipe wall after cutting, need not distort processing, vane manufacturing is simple; And SMV, SMK, SMXL, IS50, screw rod rotation type static mixer hybrid element are also complicated than the invention when making and install.
2, except HEV, compared with other all kinds, owing to the blade of the invention is triangle, therefore it is " separating gradually " to the fluid foods entered, fluid so will not be made to be subject to " unexpected collision type " and separate; It addition, material direction of advance and blade face do not have an angle, but tangential contact, corner is gradually increased, resistance is little, thus saves energy consumption;
3, except HEV, compared with other all kinds, the triangular vane of the invention is being by gradual in inclined plane 3 to separating fluid, so not resulting in hanging as pulp fiber one class material (other type all can easily hanging);Comparatively speaking, do not easily cause as the degree of polymerization (viscosity) decline because of overweight cutting of polyacrylamide family macromolecule one class fluid yet.
4, as SMV, SMK, SMXL, IS50, SMR, CT, screw spiral type, threadiness fluid or highly concentrated, High-Sr granite easily will not be blocked like that;
5, because blade construction is simple, except HEV, all than other all kinds static mixer easy cleaning.
Although 6, HEV type static mixer is the same with the invention, have simple in construction, energy-conservation, will not hanging, will not block, but it does not separate fluid function, only produces the little rotating flow of periphery, on the whole, mixed effect is more far short of what is expected than the invention.
Except the technical characteristic solving the technical problem that, constituting technical scheme except invention described above and the advantage brought by the technical characteristic of these technical schemes, the advantage that the other technologies feature comprised in other technologies problem that the triangle tube wall vane static mixer of the present invention can solve, technical scheme and these technical characteristics bring, will be described in more detail in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structure composition and the operation principle schematic diagram of existing Kenics static mixer (KSM);
Fig. 2 is the perspective view of the triangle tube wall vane static mixer basic-unit section of the present invention;
Fig. 3 is the axonometric drawing of Fig. 2;
Fig. 4 is the making figure of blade;
Fig. 5 is the structural representation of Fig. 4 Leaf;
Fig. 6 is the C direction view of Fig. 5;
Fig. 7 is the D direction view of Fig. 5;
Fig. 8 is the A direction view of Fig. 9;
Fig. 9 is triangle tube wall vane static mixer basic-unit section plan view;
Figure 10 is the B direction view of Fig. 9;
Figure 11 is static mixer basic-unit section mixing principle;
Figure 12 is the structural representation of blade and weld connection angle, tube wall face;
Figure 13 is the A direction view of Figure 12;
Figure 14 is the structural representation being welded with three vanelets at three blades in the middle of between two;
Figure 15 is the structural representation of the embodiment of the present invention 3;
Detailed description of the invention
Embodiment 1:
From Fig. 2 and Fig. 3, basic-unit section is become with the three triangle tube wall vane group being welded on its inwall by a pitch circle pipe. In figure, bold portion is blade, and dotted line or chain-dotted line part are pipe; Right figure is (right-to-left is seen) axonometric drawing of left figure.
The making of blade is shown in that Fig. 4, each blade draw materials and is taken from external pipe; During making, take one section of pipe (according to blade design size, it is determined that pipe height), tube wall forms vertical 3 according to dotted line cutting; Forming cambered surface 4 (cambered surface 4 keeps vertical with tube wall surface everywhere) according to chain-dotted line cutting on tube wall simultaneously, keep square with the axis formation bottom surface 5, the length of bottom surface depends on blade angle and the size of design; Vertical 3 is at a right angle with bottom surface 5. The blade being fabricated to is shown in Fig. 5, Fig. 6 and Fig. 7, has and curved surfaces 2. When welding, cambered surface 4 being welded with round tube inner wall laminating, the right angle portions of blade is stretched and is suspended in pipe; Three blades be 120 ° uniform on inwall.
During use, shown in the flow direction of fluid foods such as Fig. 8, Fig. 9, Figure 10 and Figure 11:
The fluid foods the being mixed right-hand member from the most advanced and sophisticated side of blade enters, and flows to the left, and the left side saving cylinder 1 from unit is flowed out. Tip is one end contrary with bottom surface, bottom surface 5, and cambered surface 4 is welded with cylinder 1.
In fig. 11, bold portion is blade, dotted line or chain-dotted line part are pipe outline portion, the double; two dotted line of drawing of arrow is the fluid foods basic flow trace between three leaf areas, the fluid foods being mixed enters after in blender basic-unit section from right side, is separated three approximate region being split into not exclusively cutout mutually gradually by three blades (effect of figure Leaf vertical 3);Owing to arc blade face 2 and the deflection of blade turn to installation, while fluid foods moves axially, it is subject to the guide functions of blade, formed in every piece of leaf area to cylinder inwall direction partially rotate to, " move axially " with " to cylinder inwall direction partially rotate to " combination, make three regional fluids form minor spiral eddy current and move ahead; When fluid is after blade bottom surface 5 is left in left side, each region stream starts to converge, and makes bulk flow produce rotation around axle center under original respective inertia flow effect to move ahead flowing. So, go successively in next blender basic-unit section, continue the cycle of the next one " separate gradually, rotate, converge ". According to design needs, neighboring unit cells saves, or every two basic-unit sections, the rotation direction of blade is modified to reversely, is conducive to mixing.
Embodiment 2:
In engineering design and specific implementation process, following aspect to be held:
(1) based on the invention static mixer in use basic-unit section, the two ends processing of each (or each two) unit joint has flange, relying on Flange joint between each (or often group) mixed cell, the blade rotation direction of adjacent cells joint or adjacent mixed cell can change over reverse interleaved.
(2) according to the characteristic of the fluid principal goods material that need to mix and concentration, and outer mixed material variety is how many and mixed volume, determines the size of blade. " length of vertical 3 and the arc length of cambered surface 5 " in big little finger of toe Fig. 5 of blade, both length ratios determine " length in face 4 " and " angle that face 4 forms " (adding man-hour also referred to as cutting angle α at leaf production) with face 3. Wherein " cambered surface 5 " arc length preferred range is that the mixing pitch circle cylinder week circular arc of 0.083～0.167 times is long; Cutting angle α is between 15 °～30 °.
(3) when making cut-off blade, keep facet vertical with between tube wall face, after cutting into blade, ensure that between each and each, the corner angle of composition smooth; Three blades are equidistantly uniformly distributed alternate 120 ° of inside pipe wall; After blade welds with tube wall face, keep sliding clean, stingless, angle class point scar. Vane tip is 0 ° with tube wall " initiate and weld contact connection angle β " (see Figure 12 and Figure 13); Vane tip and cylinder inwall point S, bottom surface contact point is E point, γ angle (see Figure 13) the according to circumstances alterable that S point is formed with E point, but γ≤60 °.
(4) if mixing pitch circle cylinder is relatively large in diameter, or in unit saves, wish that convection cell thing separates and degree of rotation further promotes, (vertical can be shorter then can be welded with three vanelets at three blades of inside pipe wall in the middle of between two again, so during welding, stagger at end face in bottom surface and big blade face), see Figure 14.
Embodiment 3
Experimental provision: in order to measure the invention static mixer effect by experiment, establish the experimental provision such as Figure 15. In figure, 4 is tested static mixer unit, and every kind of blender adopts 2 unit joints. 1 is stainless steel water tank; 2 is small-sized middle underflow pump; 3 is effusion meter; 5 is valve; 6 is Pressure gauge. Main fluid foods of measuring is through the Pressure Drop of mixed cell, change in flow and distribution and hanging situation. Tested static mixer unit adopts two kinds, a kind of for 2 unit joints of the invention blender; Another is standard type 2 groups of mixed cell elements of static mixer Kenics static mixer. Material is lucite, customization processing.
Experiment purpose: do the contrast of the pressure of two kinds of blenders, change in flow and distribution and hanging situation three aspect.
Experiment condition: material adopts the needlebush bleaching slurry pulled an oar.Measure respectively clear water (0%), 0.2%, 0.5%, 1%, 1.5%, 2%, 2.5%, fluid foods under 3% 8 kind of condition is through the Pressure Drop of two kinds of mixer units, change in flow distribution and hanging situation. Pulp pump lift is 32m.
Experimental technique: the pressure gauge reading measuring dependence mixer unit both sides of Pressure Drop; The mensuration of velocity flow profile adopts high-speed camera, and various situations all add the coloured fibre of trace; The mensuration of hanging situation adopts and holds up observation analysis again after dismounting after flowing through 20min.
Experimental effect analysis:
The Pressure Drop contrast of (1) two kind of blender
Clear water (0%) and 0.2%, 0.5% slurry concentration time, two kinds of mixer pressure drop basically identical; When concentration is more than 0.5%, Pressure Drop significantly increases (rising in positive exponent, it is judged that paper pulp manifests non-Newton fluid characteristic) gradually, and when reaching 3%, the invention blender is lower by 26% than standard type.
The change in flow of (2) two kinds of blenders and profiles versus
When clear water (0%) and 0.2% slurry concentration, standard type blender change in flow is fast and local turbulence (little eddy current) scope is big; And the invention blender change in flow transitional face is to steadily. When concentration is more than 0.5%, the change of standard type blender speed is obviously reduced gradually, and local turbulence (little eddy current) scope substantially restrains, but makes being obstructed of pulp flow significantly increase in the straight Ban Kou porch of blade; The invention blender change in flow transitional face to steadily, the drag minimization of pulp flow, and make stream of slurry turning effort better.
The hanging situation contrast of (3) two kinds of blenders
When clear water (0%) and 0.2% slurry concentration, standard type blender not hanging substantially; And the invention blender not hanging. When concentration is more than 0.5%, standard type blender hanging more and more substantially increases, and starches that dense to reach 3% hanging fairly obvious; There is not hanging in the invention.
The mixing efficiency contrast of (4) two kinds of blenders
From the conclusion that the experimental provision additionally made draws: mixing efficiency (really) contrast of two kinds of blenders is substantially suitable.
Above in association with accompanying drawing, embodiments of the present invention are described in detail, but the present invention is not limited to described embodiment. For those of ordinary skill in the art, in the scope of principles of the invention and technological thought, these embodiments are carried out multiple change, amendment, replacement and deformation and still falls within protection scope of the present invention.
Claims (8)
1. a triangle tube wall vane static mixer, it is characterized in that: include unit joint cylinder and be fixedly mounted on the blade of cylinder inboard wall, it is characterized in that: described blade is to be cut, by cylinder, the triangle tube wall blade that formed, three triangle tube wall blades be 120 ° uniform on inwall.
2. triangle tube wall vane static mixer according to claim 1, it is characterized in that: described triangle tube wall blade is to be connected, by base, vertical edges and arc limit, the triangle formed, described vertical edges and base vertical, connection base, described arc limit and vertical edges end, the axial line of described vertical edges and cut cylinder at grade, weld with cylinder inboard wall by described arc limit.
3. triangle tube wall vane static mixer according to claim 2, it is characterised in that: the cylinder week circular arc that the arc length on described arc limit is 0.083～0.167 times is long.
4. triangle tube wall vane static mixer according to claim 2, it is characterised in that: the cutting angle α of described triangle tube wall blade is 15 °～30 °.
5. triangle tube wall vane static mixer according to claim 2, it is characterised in that: described triangle tube wall vane tip initial welding contact connection angle β is 0 °.
6. triangle tube wall vane static mixer according to claim 1, it is characterised in that: described unit joint arranged in series, neighboring unit cells saves the oppositely oriented of blade.
7. triangle tube wall vane static mixer according to claim 1, it is characterised in that: described unit joint arranged in series, oppositely oriented every two basic-unit section blades.
8. the fluid mixing method of triangle tube wall vane static mixer according to claim 1, it is characterized in that: during use, cylinder inwall direction partially rotate to, move axially with to cylinder inwall direction partially rotate to combination, make three regional fluids mutually not exclusively stop, form minor spiral eddy current and move ahead; When fluid is after blade base is left in left side, each region stream starts to converge, and makes bulk flow produce rotation around axle center under original respective inertia flow effect to move ahead flowing.
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| CN201610136778.4A CN105664749B (en) | 2016-03-10 | 2016-03-10 | Triangle tube wall vane static mixer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362608A (en) * | 2016-11-18 | 2017-02-01 | 广西大学 | Cooling mixing tube for chemical engineering |
| CN106731937A (en) * | 2017-01-19 | 2017-05-31 | 太原理工大学 | Disinfectant mixing arrangement for supplementing chlorine residue between pipe network |
| CN106732147A (en) * | 2017-01-21 | 2017-05-31 | 上泰仪器（昆山）有限公司 | A kind of acid-base value intelligent transducer |
| CN107826076A (en) * | 2017-12-11 | 2018-03-23 | 山东交通学院 | A kind of safety belt tight receiving apparatus automatically |
| CN109621759A (en) * | 2018-12-29 | 2019-04-16 | 徐州坤元电子科技有限公司 | A kind of mixing arrangement for circuit board cleaning solution |
| CN112973485A (en) * | 2021-03-18 | 2021-06-18 | 同济大学 | Quick tubular static mixer |
| EP3702715A4 (en) * | 2017-10-27 | 2021-11-24 | China Petroleum & Chemical Corporation | Enhanced heat transfer pipe, and pyrolysis furnace and atmospheric and vacuum heating furnace comprising same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362608A (en) * | 2016-11-18 | 2017-02-01 | 广西大学 | Cooling mixing tube for chemical engineering |
| CN106362608B (en) * | 2016-11-18 | 2019-04-26 | 广西大学 | A kind of cooling mixing tube of chemical industry |
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| CN106732147A (en) * | 2017-01-21 | 2017-05-31 | 上泰仪器（昆山）有限公司 | A kind of acid-base value intelligent transducer |
| EP3702715A4 (en) * | 2017-10-27 | 2021-11-24 | China Petroleum & Chemical Corporation | Enhanced heat transfer pipe, and pyrolysis furnace and atmospheric and vacuum heating furnace comprising same |
| CN107826076A (en) * | 2017-12-11 | 2018-03-23 | 山东交通学院 | A kind of safety belt tight receiving apparatus automatically |
| CN107826076B (en) * | 2017-12-11 | 2024-01-26 | 山东交通学院 | Automatic tightening device for safety belt |
| CN109621759A (en) * | 2018-12-29 | 2019-04-16 | 徐州坤元电子科技有限公司 | A kind of mixing arrangement for circuit board cleaning solution |
| CN109621759B (en) * | 2018-12-29 | 2021-05-07 | 徐州坤元电子科技有限公司 | Mixing device for circuit board cleaning fluid |
| CN112973485A (en) * | 2021-03-18 | 2021-06-18 | 同济大学 | Quick tubular static mixer |
| CN112973485B (en) * | 2021-03-18 | 2021-12-07 | 同济大学 | Quick tubular static mixer |
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| CN105664749B (en) | 2016-09-28 |
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