CN204107475U - Percussion flow structure and percussion flow-rotary packed bed device - Google Patents
Percussion flow structure and percussion flow-rotary packed bed device Download PDFInfo
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- CN204107475U CN204107475U CN201420542007.1U CN201420542007U CN204107475U CN 204107475 U CN204107475 U CN 204107475U CN 201420542007 U CN201420542007 U CN 201420542007U CN 204107475 U CN204107475 U CN 204107475U
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- main feed
- feed pipe
- discharge opening
- percussion flow
- sleeve pipe
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Abstract
The utility model belongs to the technical field of the quick microcosmic mixed reactor of forced fluid-liquid, specifically a kind of percussion flow structure and percussion flow-rotary packed bed device, solves the problem that existing percussion flow structure mixed effect is undesirable, uneven.Percussion flow structure, comprise the different main feed pipe of caliber and sleeve pipe, main feed pipe discharging section has some main feed pipe discharge openings near the side of sleeve pipe, the corresponding main feed pipe discharging section of sleeve bottom also has the upper and lower one_to_one corresponding of some and main feed pipe discharge opening, the coaxial sleeve pipe discharge opening arranged.Percussion flow-rotary packed bed device, percussion flow vibrational power flow is in the cavity of rotary packed bed rotor and arrange along rotor axis direction.The utility model has inequality charging Homogeneous phase mixing, fast reaction, the reaction time is short, the loss of momentum is little advantage, is particularly useful for the fast reaction of industrial inequality charging in enormous quantities and has the reaction system of certain viscosity property.
Description
Technical field
the utility model belongs to the technical field of the quick microcosmic mixed reactor of forced fluid-liquid, specifically a kind of percussion flow structure and percussion flow-rotary packed bed device.
Background technology
At present, for the circulating percussion flow of the main submergence of percussion flow structure and the Impinging Stream-Rotating Packed Bed device of reactive liquid solution.But the circulating percussion flow of submergence also also exists some shortcomings.First, because the motor shaft installing screw is cantilever design, if axle is longer or rotating speed very fast, the vibration of screw and motor shaft is easily caused.Secondly, the motor shaft installing screw needs installation shaft seal structure on the reactor wall, and add the manufacturing cost of reactor, long-term operating shaft seal structure easily damages, and affects the longtime running of reactor.Finally, moving component is arranged in reactor by this structure, and the probability that moving component may break down in operation process is comparatively large, and now needing stops course of reaction keeps in repair, affect the continous-stable running of device, also certain impact is produced on upstream and downstream corollary apparatus.Although improve to some extent, be still intermittently operated, disposal ability is limited.Tradition two feed pipe percussion flow devices are due to inequality charging, and microcosmic mixed effect is poor.
Percussion flow utilizes two strands or a plurality of fluids fast ram in opposite directions, between two feed pipes, form strong turbulent core region, carry out the transmission of high momentum, tubulence energy dissipative shock wave sharply increases, axial velocity is rapidly 0 change radial velocity into, thus produces strong microcosmic mixing.Determining Micromixing Characteristic Time and tubulence energy dissipative shock wave are inversely proportional to, and namely tubulence energy dissipative shock wave is larger, and Determining Micromixing Characteristic Time is less, and the effect of microcosmic mixing is also better.The quality of microcosmic mixing can change the quality of product, and then changes the character of product.The industrial fast reaction process by microcosmic mixed influence comprises polymerization process, reaction crystallization process and part biochemical reaction process etc.Usually it comprises two feed tubes to existing percussion flow structure, and feed tube is provided with nozzle, and two nozzles are arranged in opposite directions; Feed tube and nozzle are that an angle of 90 degrees is connected, and the liquid of two nozzle ejections clashes in opposite directions.Such as: Chinese patent 201310338819.4, Chinese patent 200610102107.2 all discloses the percussion flow structure of this form.These percussion flow structures owing to only having the head-on collision of two ells, when do not wait mass flow than, on the one hand, wherein the volume of certain reactant is relatively less, cause solution to weaken in the intersectional region collision of reactor, eddy current or the volume seat intensity of generation diminish, and microcosmic mixing worsens; On the other hand, because a certain reactant local concentration is excessive, the generation of side reaction may be caused more violent, and mixed effect is undesirable, uneven.
But, most of liquid in industry, liquid fast reaction mass flow ratio unequal, the percussion flow mixed effect of existing two feed pipes is undesirable, uneven, realize clashing into cloudy surface radial and many perpendicular to the elbow needed for filler, increase resistance, thus add dynamic loss of energy, reduce initial velocity of reaction, have impact on mixed effect.The striking face produced during material impacting, due to its edge because turbulence dissipative shock wave is little compared with center.Therefore, striking face edge mixed effect is unsatisfactory.Adopt CFD simulation and PIV experiment research, result shows to clash into the stationary point mixed effect of plane best, and when shock initial velocity is 10m/s, tubulence energy dissipative shock wave by reducing to, differs at least one order of magnitude from the discharge opening center of every about a pair correspondence to surrounding.
Simultaneously, in these courses of reaction, a lot of reaction system is the hybrid reaction when there being certain viscosity property, the lifting of fluid system viscosity is deteriorated causing the mobility of fluid, reduce the dispersion yardstick of fluid, so that it is not good to produce mixed effect, many disadvantageous results such as target product degradation.Adopt iodide-iodate microcosmic hybrid test system, when system volume flow ratio is for be increased to 20 by 1, traditional percussion flow structure is increased to 0.3 from aggregate index number by 0.08, and traditional Impinging Stream-Rotating Packed Bed device is increased to 0.07 from aggregate index number by 0.017; When system viscosity rises to 300mPas by 0mPas, traditional percussion flow structure is increased to 0.5 from aggregate index number by 0.10, and traditional Impinging Stream-Rotating Packed Bed device is increased to 0.1 from aggregate index number by 0.026; Mixed effect is deteriorated, and cause accessory substance in course of reaction to increase, target product yield sharply declines, and adds the complicated procedures of forming such as subsequent products purification, for enterprise adds burden, thus affects industrial applications.
Summary of the invention
The utility model, in order to solve undesirable, the uneven problem of existing percussion flow structure mixed effect, provides a kind of percussion flow structure and percussion flow-rotary packed bed device.
The utility model takes following technical scheme: percussion flow structure, comprise the different main feed pipe of caliber and sleeve pipe, the caliber of sleeve pipe is greater than the caliber of main feed pipe, main feed pipe is inverted T-shaped tubular construction, comprise feeding section and the discharging section of orthogonal connection, sleeve pipe is placed on outside the feeding section of main feed pipe, main feed pipe feeding section arranges main feed tube mouth away from the end, one end of discharge end, main feed pipe discharging section has some main feed pipe discharge openings near the side of sleeve pipe, sleeve pipe is provided with sleeve pipe charging aperture away from one end of main feed pipe discharging section, the corresponding main feed pipe discharging section of sleeve bottom, and have the upper and lower one_to_one corresponding of some and main feed pipe discharge opening, the sleeve pipe discharge opening of coaxial setting.
Described main feed pipe discharge opening and sleeve pipe discharge opening are that some centers of circle are positioned at same circumference and the hole uniform relative to its tubular axis line center circumferential, are the ring type hole formed respectively.
Casing diameter d
2with main feed tube diameter d
1ratio be 1.5 ~ 20, casing length L
2with casing diameter d
2ratio is greater than 10 ~ 50, main feed pipe length L
1be greater than casing length L
2, main feed pipe discharge opening is to the distance d of sleeve pipe discharge opening
3with main feed pipe discharge opening diameter D
1ratio be 1 ~ 50, main feed pipe internal diameter d
1with main feed pipe discharge opening diameter D
1than being 1 ~ 100, casing diameter d
2with sleeve pipe discharge opening diameter D
2ratio 2.5 ~ 100.
Percussion flow-rotary packed bed device, comprise rotary packed bed and described percussion flow structure, rotary packed bedly comprise housing, the rotor of open circles annular, filler and rotating shaft, described percussion flow vibrational power flow is in the cavity of rotor and along the setting of rotor axis direction, the symmetry axis between main feed pipe discharge opening and sleeve pipe discharge opening is positioned at the center of rotor cavity.
Rotor internal diameter d
5with the center, hole of the main feed pipe discharge opening vertical range d to rotor inner edge
4with it than being 2 ~ 6.
Percussion flow structure of the present utility model, decreases elbow and arranges, decrease the loss of momentum, clash into initial velocity larger.Clash into initial velocity for 10m/s, increase by 2 90 ° of elbows, drag losses is 75J/kg, and kinetic energy is only does not have 1/4 of elbow, and stroke speed greatly reduces thereupon.According to Newton law, larger shock initial velocity defines stronger Momentum Transfer, and energy dissipation strengthens, and produces strong microcosmic mixing.Due to the edge effect of striking face, microcosmic mixing is also desirable unlike striking face central area, and by rotary packed bed High Rotation Speed, edge liquid shear, makes material mix further.
Microcosmic mixing refers to intermolecular mixing, and microcosmic troubled water then uses parameter microcosmic composite character time parameter t
mcharacterize, the Determining Micromixing Characteristic Time of percussion flow structure of the present utility model and Impinging Stream-Rotating Packed Bed device is respectively 0.8 and 0.07ms, under the same terms, 1.4ms and the 0.2ms Determining Micromixing Characteristic Time of more traditional two ell percussion flow structures and Impinging Stream-Rotating Packed Bed device is 2 times of percussion flow structure of the present utility model and Impinging Stream-Rotating Packed Bed device, and mixed effect is poor.Reaction time is short, is applicable to fast reaction; Its ring type hole size, along with how many changes of inlet amount, is especially adapted to inlet amount and requires larger production.
Percussion flow structure of the present utility model and Impinging Stream-Rotating Packed Bed device, adopt iodide-iodate reaction system, be 1 ~ 20 at feed rate, percussion flow structure becomes 0.115 from aggregate index number from 0.065, and Impinging Stream-Rotating Packed Bed device 0.006 becomes 0.02; When liquid viscosity is 0 mPas ~ 300 mPas, percussion flow structure becomes 0.28 from aggregate index number from 0.06, and Impinging Stream-Rotating Packed Bed device becomes 0.07 from aggregate index number from 0.006.In inequality charging and viscous systems, more traditional percussion flow structure and traditional Impinging Stream-Rotating Packed Bed device decrease 1/2 ~ 1/3 from aggregate index number, and microcosmic mixed effect is greatly improved.Such advantage, accessory substance in course of reaction is reduced, and target product yield improves, and for enterprise has saved cost in industrial applications, improves profit.
Compared with prior art, percussion flow of the present utility model maintains tradition two ell percussion flow devices continued operation, disposal ability is strong, treating capacity is large, easy to maintenance advantage, overcome the shortcoming of current two pipe charging percussion flows, there is inequality charging Homogeneous phase mixing, fast reaction, the reaction time is short, the loss of momentum is little advantage, achieve the good mixing of microcosmic first; , be coupled with rotary packed bed, the advantage of rotary packed bed mixing uniformity, can make the uniform further mixing of material, be particularly useful for the fast reaction of industrial inequality charging in enormous quantities and have the reaction system of certain viscosity property meanwhile.
Accompanying drawing explanation
Fig. 1 is Impinging Stream-Rotating Packed Bed device schematic diagram;
Fig. 2 is percussion flow structural representation;
Fig. 3 is Impinging Stream-Rotating Packed Bed device technique flow chart;
Fig. 4 is sleeve pipe hole structure figure;
Fig. 5 is main feed pipe hole structure figure;
Fig. 6 is that cloudy surface figure is clashed in percussion flow;
Fig. 7 is percussion flow Parameter Map;
In figure: 1-percussion flow structure; 2-filler; 3-open circles ring-shaped rotor; 4-housing; 5-liquid outlet; 6-rotating shaft; 7-reservoir I; 8-noncorrosive pump I; 9-valve I, 10-fluid flowmeter I, 11-reservoir II, 12-noncorrosive pump II, 13-valve II, the main feed pipe of 14-fluid flowmeter II, 1.1-; 1.2-sleeve pipe; The main feed tube mouth of 1.3-; 1.4-sleeve pipe charging aperture; The main feed pipe discharge opening of 1.5-; 1.6-sleeve pipe discharge opening.
Detailed description of the invention
As Fig. 2, 4, shown in 5, percussion flow structure, comprise the different main feed pipe 1.1 of caliber and sleeve pipe 1.2, the caliber of sleeve pipe 1.2 is greater than the caliber of main feed pipe 1.1, main feed pipe 1.1 is inverted T-shaped tubular construction, comprise feeding section and the discharging section of orthogonal connection, sleeve pipe 1.2 is placed on outside the feeding section of main feed pipe 1.1, main feed pipe 1.1 feeding section arranges main feed tube mouth 1.3 away from the end, one end of discharge end, main feed pipe 1.1 discharging section has some main feed pipe discharge openings 1.5 near the side of sleeve pipe, sleeve pipe 1.2 is provided with sleeve pipe charging aperture 1.4 away from one end of main feed pipe discharging section, corresponding main feed pipe discharging section bottom sleeve pipe 1.2, and have some and main feed pipe discharge opening about 1.5 one_to_one corresponding, the sleeve pipe discharge opening 1.6 of coaxial setting.According to the difference of material viscosity, main feed pipe discharge opening 1.5 can be the same or different with sleeve pipe discharge opening 1.6 aperture.When material viscosity is larger, main feed pipe discharge opening 1.5 can become large with sleeve pipe discharge opening 1.6 aperture.
Described main feed pipe discharge opening 1.5 and sleeve pipe discharge opening 1.6 are that some centers of circle are positioned at same circumference and the hole uniform relative to its tubular axis line center circumferential, are the ring type hole formed respectively.
As shown in Fig. 4,5,7, casing diameter d
2with main feed tube diameter d
1ratio be 1 ~ 20, in order to the flow regime making fluid keep stable, casing length L
2with casing diameter d
2ratio is greater than 10 ~ 50, main feed pipe length L
1be greater than casing length L
2, main feed pipe discharge opening is to the distance d of sleeve pipe discharge opening
3with main feed pipe discharge opening diameter D
1ratio be 1 ~ 50, during ratio too large shock, initial velocity diminishes, and energy dissipation reduces, and mixed effect is deteriorated.When same feedstock flow, discharge opening diameter is excessive, and shock initial velocity is diminished, and Momentum Transfer diminishes, and microcosmic mixed effect is deteriorated; And nozzle is too small, cause discharge opening pressure excessive, according to the size of feed pipe internal diameter, main feed pipe internal diameter d
1with main feed pipe discharge opening diameter D
1than being 1 ~ 100, casing diameter d
2with sleeve pipe discharge opening diameter D
2ratio is 2 ~ 100.
As shown in Figure 1, percussion flow-rotary packed bed device, comprise rotary packed bed and described percussion flow structure 1, rotary packed bedly comprise housing 4, the rotor 3 of open circles annular, filler 2 and rotating shaft 6, described percussion flow vibrational power flow is in the cavity of rotor 3, and the symmetry axis between main feed pipe discharge opening 1.5 and sleeve pipe discharge opening 1.6 is positioned at the center of rotor 3 cavity.
As shown in Figure 7, described rotor internal diameter d
5with the center, hole of the main feed pipe discharge opening vertical range d to open circles ring-shaped rotor 3 inner edge
4with it than being 2 ~ 6.Ratio is too large, and the liquid after shock cannot enter and rotary packed bedly carries out secondary mixing and directly flow out, and microcosmic mixed effect is deteriorated.
As shown in Figure 3, the course of work of novel percussion flow of the present utility model-rotary packed bed device is as follows: solution storage is in reservoir I7, reservoir II11, through pressurized feedstock by noncorrosive pump I8, noncorrosive pump II12, respectively from main feed tube mouth 1.3 and sleeve pipe charging aperture 1.4, enter percussion flow structure, material sprays from main feed pipe discharge opening 1.5 and sleeve pipe discharge opening 1.6, impingement mix in the cavity of open circles ring-shaped rotor 3, carry out material to clash into first, reach impingement mix object, realize fast, uniform microcosmic mixes, reaction.Material enters into filler 2 from the cavity of open circles ring-shaped rotor 3, open circles ring-shaped rotor 3 rotates under the drive of rotating shaft 6, the powerful centrifugal force produced by super gravity field makes material carry out secondary mixing in by the radial and axial process of packing layer, finally discharges from liquid outlet 5.
Embodiment 1:
Adopt novel Impinging Stream-Rotating Packed Bed device d
2/ d
1=1.5, L
2/ d
2=10, d
3/ D
1=6, d
1/ D
1=10, d
2/ D
1=20.A, B solution volume flow ratio are 1, d
5/ d
4=6.Carry out the research of diesel emulsion.The diesel oil of 0.8000g/mL is stored in reservoir I7, be solution A, 3% be placed in reservoir II11 by the composite emulsifying agent obtained of Tween80 and Span, be solution B, respectively through pump and flowmeter, , clashed into first in the cavity of rotor by percussion flow, the fluid-mixing formed enters in packing layer 2, rotor 3 rotates under the drive of rotating shaft 6, when rotating speed is 1200r/min, the powerful centrifugal force produced by super gravity field makes fluid-mixing carry out secondary mixing, reaction, finally enter liquid outlet 5 to discharge, obtain diesel oil emulsification leave standstill 1 month not stratified.
Embodiment 2:
Adopt novel Impinging Stream-Rotating Packed Bed device d
2/ d
1=10, L
2/ d
2=30, d
3/ D
1=1, d
1/ D
1=100, d
2/ D
2=2.5.A, B solution volume flow ratio are 5, d
5/ d
4=2, carry out the research of Emulsification of Paraffin.Solution A paraffin is placed in reservoir 7, 5% by Span80, K12 and assistant for emulsifying agent A is composite and must be placed in reservoir 11 by emulsifying agent, be solution B, respectively through noncorrosive pump I8, noncorrosive pump II12 and flowmeter I10, flowmeter II14, clash into first in the cavity of open circles ring-shaped rotor by newly hitting stream, the fluid-mixing formed enters in packing layer 2, open circles ring-shaped rotor 3 rotates under the drive of rotating shaft 6, when rotating speed is 1100r/min, the powerful centrifugal force produced by super gravity field makes fluid-mixing carry out secondary mixing, reaction, finally enter liquid outlet 5 to discharge, the paraffin wax emulsions obtained carries out dewatering ability experiment at centrifuge, emulsion is not stratified.
Embodiment 3:
Adopt novel Impinging Stream-Rotating Packed Bed device d
2/ d
1=20, L
2/ d
2=50, d
3/ D
1=10, d
1/ D
1=50, d
2/ D
2=100.A, B solution volume flow ratio are 20, d
5/ d
4=2, carry out the preparation of microemulsion.The HCl of 1mol/L is placed in reservoir I7, kerosene and 3% Span80 be placed in reservoir II11, respectively through noncorrosive pump I8, noncorrosive pump II12 and flowmeter I10, flowmeter II14, solution A flow is regulated to be 120L/h, the flow of solution B is 80L/h, pass through, percussion flow is clashed into first in the cavity of open circles ring-shaped rotor, the fluid-mixing formed enters in packing layer 2, open circles ring-shaped rotor 3 rotates under the drive of rotating shaft 6, when rotating speed is 900r/min, the powerful centrifugal force produced by super gravity field makes fluid-mixing carry out secondary mixing, reaction, finally enter liquid outlet 5 to discharge, the emulsion average grain diameter obtained is 30nm.
Embodiment 4:
Adopt novel Impinging Stream-Rotating Packed Bed device d
2/ d
1=5, L
2/ d
2=20, d
3/ D
1=50, d
1/ D
1=1, d
2/ D
2=100.A, B solution volume flow ratio are 10, d
5/ d
4=5, prepare the research of super fine magnesium hydroxide.NaOH concentration is that the solution A of 1.5mol/L is placed in reservoir I7, density of magnesium chloride is that the solution B of 0.75mol/L is placed in reservoir II11, respectively through noncorrosive pump I8, noncorrosive pump II12 and flowmeter I10, flowmeter II14, regulate solution A, the flow of B is 160L/h, clashed into first in the cavity of rotor open circles annular by percussion flow, the fluid-mixing formed enters in packing layer 2, open circles ring-shaped rotor 3 rotates under the drive of rotating shaft 6, when rotating speed is 1000r/min, the powerful centrifugal force produced by super gravity field makes fluid-mixing carry out secondary mixing, reaction, finally enter liquid outlet 5 to discharge, after filtration drying, obtain the superfine Mg (OH) that average grain diameter is 50nm
2.
Claims (5)
1. a percussion flow structure, it is characterized in that: comprise the different main feed pipe (1.1) of caliber and sleeve pipe (1.2), the caliber of sleeve pipe (1.2) is greater than the caliber of main feed pipe (1.1), main feed pipe (1.1) is inverted T-shaped tubular construction, comprise feeding section and the discharging section of orthogonal connection, sleeve pipe (1.2) is placed on outside the feeding section of main feed pipe (1.1), main feed pipe (1.1) feeding section arranges main feed tube mouth (1.3) away from the end, one end of discharge end, main feed pipe (1.1) discharging section has some main feed pipe discharge openings (1.5) near the side of sleeve pipe, sleeve pipe (1.2) is provided with sleeve pipe charging aperture (1.4) away from one end of main feed pipe discharging section, the corresponding main feed pipe discharging section in sleeve pipe (1.2) bottom, and have some and main feed pipe discharge opening (1.5) one_to_one corresponding up and down, the sleeve pipe discharge opening (1.6) of coaxial setting.
2. percussion flow structure according to claim 1, it is characterized in that: described main feed pipe discharge opening (1.5) and sleeve pipe discharge opening (1.6) are positioned at same circumference and the hole uniform relative to its tubular axis line center circumferential for some centers of circle, are the ring type hole formed respectively.
3. percussion flow structure according to claim 1 and 2, is characterized in that casing diameter (d
2) and main feed tube diameter (d
1) ratio be 1.5 ~ 20, casing length (L
2) and casing diameter (d
2) ratio is greater than 10 ~ 50, main feed pipe length (L
1) be greater than casing length (L
2), main feed pipe discharge opening is to the distance (d of sleeve pipe discharge opening
3) and main feed pipe discharge opening diameter (D
1) ratio be 1 ~ 50, main feed pipe internal diameter (d
1) and main feed pipe discharge opening diameter (D
1) than being 1 ~ 100, casing diameter (d
2) and sleeve pipe discharge opening diameter (D
2) ratio is 2.5 ~ 100.
4. percussion flow-rotary packed bed device, comprise percussion flow structure rotary packed bed and as claimed in claim 3, rotary packed bedly comprise housing (4), the rotor (3) of open circles annular, filler (2) and rotating shaft (6), it is characterized in that: described percussion flow vibrational power flow is in the cavity of rotor (3) and along the setting of rotor axis direction, the symmetry axis between main feed pipe discharge opening (1.5) and sleeve pipe discharge opening (1.6) is positioned at the center of rotor (3) cavity.
5. percussion flow according to claim 4-rotary packed bed device, is characterized in that: rotor internal diameter (d
5) with the center, hole of the main feed pipe discharge opening vertical range (d to rotor inner edge
4) with it than being 2 ~ 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420542007.1U CN204107475U (en) | 2014-09-20 | 2014-09-20 | Percussion flow structure and percussion flow-rotary packed bed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420542007.1U CN204107475U (en) | 2014-09-20 | 2014-09-20 | Percussion flow structure and percussion flow-rotary packed bed device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204107475U true CN204107475U (en) | 2015-01-21 |
Family
ID=52324837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420542007.1U Withdrawn - After Issue CN204107475U (en) | 2014-09-20 | 2014-09-20 | Percussion flow structure and percussion flow-rotary packed bed device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204107475U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226202A (en) * | 2014-09-20 | 2014-12-24 | 中北大学 | Impinging stream structure and impinging stream and rotary material packed bed device |
-
2014
- 2014-09-20 CN CN201420542007.1U patent/CN204107475U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226202A (en) * | 2014-09-20 | 2014-12-24 | 中北大学 | Impinging stream structure and impinging stream and rotary material packed bed device |
| CN104226202B (en) * | 2014-09-20 | 2017-03-29 | 中北大学 | Clash into flow structure and percussion flow-rotary packed bed device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20170329 |