CN205360780U - Self -driven is transferred to formula back flush recycle and regeneration fluidic device - Google Patents
Self -driven is transferred to formula back flush recycle and regeneration fluidic device Download PDFInfo
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- CN205360780U CN205360780U CN201620059770.8U CN201620059770U CN205360780U CN 205360780 U CN205360780 U CN 205360780U CN 201620059770 U CN201620059770 U CN 201620059770U CN 205360780 U CN205360780 U CN 205360780U
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- jet
- mixing chamber
- guiding channel
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- liquid collecting
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Abstract
The utility model relates to a self -driven is transferred to formula back flush recycle and regeneration fluidic device, it is including collection liquid chamber, first efflux entry, mixing chamber, efferent, jet exit and second efflux entry, the cylindric structure of collection liquid chamber adoption, collection liquid chamber top is provided with two first efflux entrys, has contained angle X between two first efflux entrys, the entry end and back flush tube coupling of two first efflux entrys, two first efflux entry exit ends are located the mixing chamber top of setting at album liquid chamber, the entry intercommunication of mixing chamber bottom export and efferent, efferent wear out collection liquid chamber bottom, with collection liquid chamber bottom swing joint, and the efferent exit end sets up the jet exit into the loudspeaker form, still be provided with second efflux entry on being located album liquid chamber upper portion side wall surface, it is tangent that second efflux entry and collection liquid chamber side wall surface are the level. The utility model discloses can realize the self -driven transfer to, avoid causing filter screen local deformation, the damaged scheduling problem that washes out, the life of extension rotary sieve.
Description
Technical field
This utility model relates to a kind of liquid-solid separation device, especially with regard to a kind of and the rotary sieve filter fits application of LNG receiving station self-driven tuning formula backwash circular regeneration mjector.
Background technology
LNG receiving station rotary sieve filter has that seawater corrosion resistance, separation efficiency be stable and the feature such as resistance is suitable, rotary sieve filter generally supports the use with the trash rack of upstream side, can effectively intercept and the granule foreign dirt in filtering sea, be the key equipment ensureing LNG receiving station sea water pump and intake facility reliability service.As shown in Figure 1 and Figure 2, rotary sieve filter primary structure includes: upper stand 21, motor 22, turbine worm reducer 23, driving chain 24, guide rail 25, main shaft turn join 26, screen pack 27, backwash circular regeneration mjector 28 and sewage sump 29 etc., wherein backwash circular regeneration mjector 28 is main is constituted (not shown) by feed pump, electromagnetic valve, counter-flushing pipeline and the mjector that is connected with counter-flushing pipeline.
The operation principle of rotary sieve filter is: motor 22 rotates and drives reductor 23 to move, the big drive sprocket in work sprocket wheel spindle mounted 26 is driven to rotate by engaging driving chain 24, the distance being disengaged between partly more than basin bottom arc orbit radius below work sprocket radius is rectilinear motion, and work chain Sports band moves screen pack 27 thereon and moves.Owing to screen pack 27 motor process is to rise on one end, the other end declines, screen pack 27 rising end is taken out of filtering the granule foreign material intercepted on wire side in uphill process, granule foreign material are dammed and are formed cake layer on web plate, along with the carrying out filtered, the cake layer progressive additive of web plate outer surface, the porosity causing screen pack reduces, pressure drop increases, now need the mode adopting backwash that the granule foreign being attached on rotary sieve is purged, during backwash, electromagnetic valve is opened, the press water provided from feed pump enters the counter-flushing pipeline on circular regeneration mjector 28, then sprayed by mjector, will be attached to the punching of the granule foreign material on screen pack 27 and fall in sewage sump 29, by sewage sump 29, foreign material punching is shifted onto in blowdown ditch again, then concentrate and unload dirt and transport.Owing to the direction of the water jet of circular regeneration mjector 28 employing is contrary with filtering direction, therefore which is also referred to as backwash circular regeneration, the water under high pressure kinetic energy relying on back purge system ejection will attach to the cake layer of screen pack 27 outer surface and peels off, the porosity and the operation pressure drop that make screen pack 27 essentially return to state when filtering at first, thus realizing the performance cycle regeneration of rotary sieve.
In sum, backwash mode is the important channel realizing the regeneration of screen pack performance cycle.Finding in research, the performance of backwash mjector directly affects the long-period stable operation of rotary sieve filter.As shown in Figure 3, Figure 4, in prior art, backwash mjector is through type single tube structure, rotary sieve actual moving process finds, the mjector of this structure inevitably produces problems with in practical operation: 1, backwash jet energy concentrates on rotary sieve ad-hoc location, it is easy to cause the even erosion of rotary filter screen plate local deformation damaged.Prior art have employed the mjector of through type single hole arrangements, when rotary sieve is carried out backwash, owing to jet direction is fixed, therefore jet impact force unavoidably concentrates on a certain specific region of screen pack, the screen pack causing this region is subject to continuous print impulsive force and deforms upon even erosion damaged for a long time, reduces the service life of rotary sieve.2, backwash circular regeneration effect is uneven, causes that rotary filter screen plate generation granule foreign is built bridge and blocked inefficacy.Restriction due to prior art mjector structure, backwash stream range is limited, the effective covering to screen pack can not be realized, there is jet blind area, the granule foreign being attached to jet blind area cannot be removed efficiently, screen pack effectively rinses in regional extent and the circular regeneration difference on effect of flushing blind area is notable, granule foreign between the screen pack rinsed in blind area is susceptible to " bridges formation " and (builds bridge: fail effectively to obtain some regions particulate thing impurity of removing and be mutually bonded in bulk and formed and larger range of can not effectively remove region, cause filter screen generation Severe blockage) and block screen pack, cause rotary sieve filtration pressure falling-rising high, the series of problems such as operation energy consumption increase and operational failure.It follows that existing backwash circular regeneration mjector can cause the problems such as filter screen breakage, filter net jam, cycle performance instability.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of self-driven tuning formula backwash circular regeneration mjector, the backwash jet making circular regeneration process is capable of self-driven tuning, problems such as the filter screen local deformation caused, erosion be damaged of avoiding the directed solid jet that prior art adopts to impact, extend the service life of rotary sieve.
The backwash inhomogeneities being improved filter screen diverse location in prior art by self-driven tuning jet that another object is that of the present utility model, is reduced the granule foreign between web plate and builds bridge, solve the cycle performance instability problem that filter net jam brings.
For achieving the above object, this utility model takes techniques below scheme: a kind of self-driven tuning formula backwash circular regeneration mjector, it is characterized in that: this device includes liquid collecting room, the first jet inlet, mixing chamber, output portion, jet exit and the second jet inlet, described liquid collecting room adopts cylindrical-shaped structure；Described liquid collecting room top is provided with two described first jet inlets, and what have angle X, described angle X between two described first jet inlets ranges for 0 ° of < X < 45 °；The arrival end of two described first jet inlets is connected with counter-flushing pipeline, and two described first jet inlet ports of export are positioned at and are arranged on above the described mixing chamber of described liquid collecting room；Described mixing chamber outlet at bottom connects with the entrance in described output portion, and described output portion passes and is flexibly connected with bottom described liquid collecting room bottom described liquid collecting room, and the described output portion port of export is set to trumpet-shaped described jet exit；Being positioned on described liquid collecting room upper side wall and be additionally provided with described second jet inlet, described second jet inlet and described liquid collecting room side wall surface are that level is tangent.
Further, described mixing chamber adopts cylindrical structure, its top is the impact walls in V shape cross section, the V-shaped groove part of this V shape impact walls is conical structure, and this V-shaped groove part is correspondingly arranged with two described first jet inlet ports of export, described V-shaped groove angle W ranges for 45 ° of < W < 150 °；Some mixing chamber entrance it has been provided at circumferentially spaced in cylindrical sidewall face；Be evenly equipped with the swirl vane of more than three in described mixing chamber outside wall surface circumference, the top of described swirl vane and described mixing chamber top are positioned at same level, and the bottom of described swirl vane and described V-shaped groove part minimum point are generally aligned in the same plane；Each described swirl vane is and is obliquely installed, and the press water jet that inclination angle γ all flows out with described second jet inlet flows to identical.
Further, described mixing chamber entrance adopts circular, rectangle or polygon.
Further, the inclination angle γ of each described swirl vane ranges for 0 ° of < γ < 30 °；And described swirl vane number is 5 to 16.
Further, described output portion with bottom described liquid collecting room between adopt bearing to be connected, and be provided with flexible seals between described bearing and described liquid collecting room；The axial pivot angle K that described mixing chamber is basic point with described bearing ranges for 0 ° of < K < 15 °.
Further, described output portion includes a housing, circular flow-guiding channel, some annular flow-guiding channels, the guide vane of more than three and deflection cone；Portion on the housing, described circular flow-guiding channel is positioned at described housing center position, and each described annular flow-guiding channel is equally spaced around arranging from the inside to the outside successively；The top of described circular flow-guiding channel and each annular flow-guiding channel all connects with described mixing chamber outlet at bottom, the conical setting of outlet at bottom of described circular flow-guiding channel and each annular flow-guiding channel, the length of each flow-guiding channel is arranged in being incremented by shape from the inside to the outside；It is positioned at described housing bottom and is provided with described guide vane, described in adjacent two, between guide vane, form blade passage；Being provided with described deflection cone between each described guide vane top and each flow-guiding channel outlet at bottom, the space formed between described deflection cone and each flow-guiding channel outlet at bottom is rectification room.
Further, the diameter of described circular flow-guiding channel is described in adjacent two between annular flow-guiding channel 2 to 3 times of spacing；The number of described guide vane is 3 to 9.
Further, each described blade passage entrance angle α is 90 °, and each described blade passage exit angle β scope is 0 ° of < β < 60 °.
This utility model is owing to taking above technical scheme, it has the advantage that 1, this utility model adopts self-driven tuning formula backwash circular regeneration mjector, can effectively reduce the prior art impulsive force to rotary sieve, the filter screen that stress fatigue causes is overcome to deform the problems such as damaged with erosion, thus extending the service life of rotary sieve.2, the self-driven tuning formula backwash circular regeneration mjector that this utility model adopts can promote jet coverage, dramatically increase jet area, reduce backwash blind area, therefore can improve the backwash inhomogeneities of filter screen web plate different piece of the prior art, reduce " bridge formation " phenomenon of particulate contaminant.
Accompanying drawing explanation
Fig. 1 is the structural representation of rotary sieve filter in prior art；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the through type single tube structure solid jet nozzle schematic diagram that prior art adopts；
Fig. 4 is the E-E sectional view in Fig. 3；
Fig. 5 is overall structure schematic diagram of the present utility model；
Fig. 6 is A-A sectional view in Fig. 5；
Fig. 7 is B-B sectional view in Fig. 5；
Fig. 8 is C-C sectional view in Fig. 5；
Fig. 9 is D-D sectional view in Fig. 5；
Figure 10 is guide vane enlarged diagram in Fig. 5.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is described in detail.It should be appreciated, however, that being provided only of accompanying drawing is more fully understood that this utility model, they should not be understood paired restriction of the present utility model.
As shown in Fig. 5～Fig. 7, this utility model provides a kind of self-driven tuning formula backwash circular regeneration mjector, and it includes liquid collecting room's the 1, first jet inlet 2, mixing chamber 3, output portion 4, jet exit 5 and the second jet inlet 6.Liquid collecting room 1 top is provided with two the first jet inlets 2, has angle X between two the first jet inlets 2；And two the first jet inlets 2 all adopt through type tubular structure.The arrival end of two the first jet inlets 2 is connected with counter-flushing pipeline, and two first jet inlet 2 ports of export are positioned at and are arranged on above the mixing chamber 3 of liquid collecting room 1, and press water jet enters in liquid collecting room 1 through two the first jet inlets 2；Liquid collecting room 1 adopts cylindrical-shaped structure.Mixing chamber 3 outlet at bottom connects with the entrance in output portion 4, and output portion 4 passes and is flexibly connected with bottom liquid collecting room 1 bottom liquid collecting room 1, and output portion 4 port of export is set to trumpet-shaped jet exit 5.It is positioned on liquid collecting room 1 upper side wall and is additionally provided with the second jet inlet 6, second jet inlet 6 is that level is tangent with liquid collecting room 1 side wall surface, enter in liquid collecting room 1 along horizontal tangential through the press water of the second jet inlet 6, the press water entered through first jet inlet the 2, second jet inlet 6 is once collected, stores by liquid collecting room 1, and provides rotation function by the second jet inlet 6 for press water.
In above-described embodiment, the optimum range between two the first jet inlets 2 with angle X is 0 ° of < X < 45 °.
In the various embodiments described above, mixing chamber 3 collects for the press water entered by first jet inlet the 2, second jet inlet 6 is carried out secondary and taps.Mixing chamber 3 adopts cylindrical structure, its top is the impact walls 7 in V shape cross section, the V-shaped groove part of this V shape impact walls 7 is conical structure, and this V-shaped groove part is correspondingly arranged with two first jet inlet 2 ports of export, to cause that impact walls 7 is unbalance when the pressure water action of the first jet inlet 2 is in impact walls 7, and make mixing chamber 3 stress swing in the horizontal direction.Being provided at circumferentially spaced some mixing chamber entrance 8 in mixing chamber 3 cylindrical sidewall face, mixing chamber's entrance 8 can adopt circle, rectangle, polygon or other geometries.Be evenly equipped with the swirl vane 9 of more than three in mixing chamber 3 outside wall surface circumference, the top of swirl vane 9 and mixing chamber 3 top are positioned at same level, and the bottom of swirl vane 9 and V-shaped groove part minimum point are generally aligned in the same plane；Each swirl vane 9 is and is obliquely installed, its inclination angle γ all with second jet inlet 6 flow out press water jet flow to identical, when the press water of the second jet inlet 6 tangentially impacts on swirl vane 9, swirl vane 9 stress and rotate.
In above-described embodiment, the inclination angle γ optimum range of each swirl vane 9 that mixing chamber 3 outer wall is arranged is 0 ° of < γ < 30 °；And the optimum number of swirl vane 9 is 5 to 16.
In above-described embodiment, the V-shaped groove angle W optimum range of impact walls 7 is 45 ° of < W < 150 °.
In the various embodiments described above, output portion 4 with bottom liquid collecting room 1 between adopt bearing 10 be connected, and between bearing 10 and liquid collecting room 1, it is provided with flexible seals 11, realized the rotation of mixing chamber 3, the sealing that connect with output portion 4 with flexible seals 11 by bearing 10.Wherein, the circular motion with axial pivot angle K that mixing chamber 3 is basic point with bearing 10, pivot angle K ranges for 0 ° of < K < 15 °.
As shown in Fig. 5, Fig. 7 to Fig. 9, output portion 4 includes 41, circular flow-guiding channel 42 of a housing, the guide vane 44 of some annular flow-guiding channels more than 43, three and deflection cone 45.On housing 41 top, circular flow-guiding channel 42 is positioned at housing 1 center position, and each annular flow-guiding channel 43 is equally spaced around arranging from the inside to the outside successively, and the water conservancy diversion to realize the press water going down process in mixing chamber 3 is uniform.The top of circular flow-guiding channel 42 and each annular flow-guiding channel 43 all connect with mixing chamber 3 outlet at bottom, and the conical setting of outlet at bottom of circular flow-guiding channel 42 and each annular flow-guiding channel 43, the length of each flow-guiding channel is incremental shape setting from the inside to the outside；And the diameter of circular flow-guiding channel 42 is between adjacent two annular flow-guiding channels 43 2 to 3 times of spacing.It is positioned at housing 41 bottom and is provided with guide vane 44, blade passage is formed between adjacent two guide vanes 44, each blade passage entrance angle α is 90 °, each blade passage exit angle β scope is 0 ° of < β < 60 ° (as shown in Figure 10), by realize jet with eddy flow in the way of the purpose that sprays, to improve backwash jet area coverage.It is provided with deflection cone 45 between each guide vane 44 top and each flow-guiding channel outlet at bottom, the space formed between deflection cone 45 and each flow-guiding channel outlet at bottom is rectification room 46, realizes the press water in each flow-guiding channel is carried out rectification and distribution by rectification room 46.Wherein, the optimum number of guide vane 44 is 3 to 9.
This utility model also provides for the using method of a kind of self-driven tuning formula backwash circular regeneration mjector, and its step is as follows:
1) during rotary sieve backwash circular regeneration, press water jet from counter-flushing pipeline is entered inside mjector of the present utility model by two paths: a part of press water jet enters liquid collecting room 1 along two the first jet inlets 2, and another part press water jet is entered liquid collecting room 1 along horizontal tangential path by the second jet inlet 6.
2) after jet is entered into liquid collecting room 1 inside by two the first jet inlets 2, jet action is in impact walls 7, due to two jets at an angle to each other to collision the angled impulsive force of wall effect, cause that impact walls 7 is unbalance in the horizontal direction, effect due to bearing 10 and flexible seals 11 so that mixing chamber 3 and connected rectification room 46 can occur in the swing effect of horizontal direction.
3) when press water jet is entered liquid collecting room 1 by the second jet inlet 6, it will producing eddy flow (as shown in Figure 6), this eddy flow tangentially acts on swirl vane 9 so that mixing chamber 3 and connected rectification room 46 circumferentially rotate.Thus, first jet inlet 2 produce horizontal pendulum power and the second jet inlet 6 produce the power that rotates in a circumferential direction combined effect under, the circular motion with axial pivot angle K that it is basic point with bearing 10 that mixing chamber 3 finally presents such that it is able to reach the jet effect of self-driven tuning formula.
In above-mentioned steps, the press water jet entered by the first jet inlet 2 and the second jet inlet 6 is once collected by liquid collecting room 1 jointly, enter in mixing chamber 3 then through mixing chamber's entrance 8, after carrying out abundant mixed flow in mixing chamber 3, downstream transmit along flow-guiding channel；Press water jet is entered rectification room 46 by flow-guiding channel, distribute under the drain of water conservancy diversion vertebra 45 to guide vane 44, blade passage is entered along angle [alpha], accelerate to rotate in blade passage, reach increase energy of the impinging jet and promote the purpose of jet uniformity, spray with β angle, thus realizing the backwash circular regeneration to rotary sieve.
In sum, the mjector that this utility model adopts, jet direction will not orientation in a certain position of rotary sieve, reduce the impact to rotary sieve, also filter screen deformation that the prior art continuously-directional jet to rotary sieve causes and the problem such as erosion is damaged are just overcome, thus extending the service life of rotary sieve.Simultaneously, from using method of the present utility model, this self-driven tuning formula backwash circular regeneration mjector can dramatically increase jet coverage at backwash process, be equivalent to improve backwash area, can effectively reduce backwash blind area, the backwash inhomogeneities of filter screen web plate different piece of the prior art can be improved, it is to avoid " bridge formation " phenomenon of particulate contaminant, improve the circular regeneration efficiency of rotary sieve.
The various embodiments described above are merely to illustrate this utility model; wherein the structure of each parts, connected mode and processing technology etc. all can be varied from; every equivalents carried out on the basis of technical solutions of the utility model and improvement, all should not get rid of outside protection domain of the present utility model.
Claims (8)
1. a self-driven tuning formula backwash circular regeneration mjector, it is characterised in that: this device includes liquid collecting room, the first jet inlet, mixing chamber, output portion, jet exit and the second jet inlet, and described liquid collecting room adopts cylindrical-shaped structure；Described liquid collecting room top is provided with two described first jet inlets, and what have angle X, described angle X between two described first jet inlets ranges for 0 ° of < X < 45 °；The arrival end of two described first jet inlets is connected with counter-flushing pipeline, and two described first jet inlet ports of export are positioned at and are arranged on above the described mixing chamber of described liquid collecting room；Described mixing chamber outlet at bottom connects with the entrance in described output portion, and described output portion passes and is flexibly connected with bottom described liquid collecting room bottom described liquid collecting room, and the described output portion port of export is set to trumpet-shaped described jet exit；Being positioned on described liquid collecting room upper side wall and be additionally provided with described second jet inlet, described second jet inlet and described liquid collecting room side wall surface are that level is tangent.
2. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 1, it is characterized in that: described mixing chamber adopts cylindrical structure, its top is the impact walls in V shape cross section, the V-shaped groove part of this V shape impact walls is conical structure, and this V-shaped groove part is correspondingly arranged with two described first jet inlet ports of export, described V-shaped groove angle W ranges for 45 ° of < W < 150 °；Some mixing chamber entrance it has been provided at circumferentially spaced in cylindrical sidewall face；Be evenly equipped with the swirl vane of more than three in described mixing chamber outside wall surface circumference, the top of described swirl vane and described mixing chamber top are positioned at same level, and the bottom of described swirl vane and described V-shaped groove part minimum point are generally aligned in the same plane；Each described swirl vane is and is obliquely installed, and the press water jet that inclination angle γ all flows out with described second jet inlet flows to identical.
3. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 2, it is characterised in that: described mixing chamber entrance adopts circular, rectangle or polygon.
4. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 2, it is characterised in that: the inclination angle γ of each described swirl vane ranges for 0 ° of < γ < 30 °；And described swirl vane number is 5 to 16.
5. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 1, it is characterised in that: described output portion with bottom described liquid collecting room between adopt bearing to be connected, and be provided with flexible seals between described bearing and described liquid collecting room；The axial pivot angle K that described mixing chamber is basic point with described bearing ranges for 0 ° of < K < 15 °.
6. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 1, it is characterised in that: described output portion includes a housing, circular flow-guiding channel, some annular flow-guiding channels, the guide vane of more than three and deflection cone；Portion on the housing, described circular flow-guiding channel is positioned at described housing center position, and each described annular flow-guiding channel is equally spaced around arranging from the inside to the outside successively；The top of described circular flow-guiding channel and each annular flow-guiding channel all connects with described mixing chamber outlet at bottom, the conical setting of outlet at bottom of described circular flow-guiding channel and each annular flow-guiding channel, the length of each flow-guiding channel is arranged in being incremented by shape from the inside to the outside；It is positioned at described housing bottom and is provided with described guide vane, described in adjacent two, between guide vane, form blade passage；Being provided with described deflection cone between each described guide vane top and each flow-guiding channel outlet at bottom, the space formed between described deflection cone and each flow-guiding channel outlet at bottom is rectification room.
7. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 6, it is characterised in that: the diameter of described circular flow-guiding channel is described in adjacent two between annular flow-guiding channel 2 to 3 times of spacing；The number of described guide vane is 3 to 9.
8. a kind of self-driven tuning formula backwash circular regeneration mjector as claimed in claim 6, it is characterized in that: each described blade passage entrance angle α is 90 °, each described blade passage exit angle β scope is 0 ° of < β < 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620059770.8U CN205360780U (en) | 2016-01-21 | 2016-01-21 | Self -driven is transferred to formula back flush recycle and regeneration fluidic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620059770.8U CN205360780U (en) | 2016-01-21 | 2016-01-21 | Self -driven is transferred to formula back flush recycle and regeneration fluidic device |
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| Publication Number | Publication Date |
|---|---|
| CN205360780U true CN205360780U (en) | 2016-07-06 |
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|---|---|---|---|
| CN201620059770.8U Withdrawn - After Issue CN205360780U (en) | 2016-01-21 | 2016-01-21 | Self -driven is transferred to formula back flush recycle and regeneration fluidic device |
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| CN (1) | CN205360780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521642A (en) * | 2016-01-21 | 2016-04-27 | 中国海洋石油总公司 | Self-driving direction-adjusting backwash cycle regeneration jetting device and use method thereof |
| CN107649013A (en) * | 2017-10-30 | 2018-02-02 | 深圳润丰投资咨询有限公司 | Nutrient solution binary channels mixing arrangement is used in a kind of plant culture |
-
2016
- 2016-01-21 CN CN201620059770.8U patent/CN205360780U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521642A (en) * | 2016-01-21 | 2016-04-27 | 中国海洋石油总公司 | Self-driving direction-adjusting backwash cycle regeneration jetting device and use method thereof |
| CN105521642B (en) * | 2016-01-21 | 2017-04-26 | 中国海洋石油总公司 | Self-driving direction-adjusting backwash cycle regeneration jetting device and use method thereof |
| CN107649013A (en) * | 2017-10-30 | 2018-02-02 | 深圳润丰投资咨询有限公司 | Nutrient solution binary channels mixing arrangement is used in a kind of plant culture |
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Granted publication date: 20160706 Effective date of abandoning: 20170426 |
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