CN104353276A - Ultrasonic-based centrifugal type bidirectional automatic-backwashing water-sediment separating device - Google Patents
Ultrasonic-based centrifugal type bidirectional automatic-backwashing water-sediment separating device Download PDFInfo
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- CN104353276A CN104353276A CN201410617563.5A CN201410617563A CN104353276A CN 104353276 A CN104353276 A CN 104353276A CN 201410617563 A CN201410617563 A CN 201410617563A CN 104353276 A CN104353276 A CN 104353276A
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Abstract
The invention discloses an ultrasonic-based centrifugal type bidirectional automatic-backwashing water-sediment separating device. The water-sediment separating device is characterized by comprising a pipeline unit (1), a vibration generating unit (2), a water flow monitoring unit (3) and an automatic control unit (4), wherein the pipeline unit (1) is arranged inside the vibration generating unit (2); the water flow monitoring unit (3) is arranged inside the pipeline unit (1); the automatic control unit (4) is connected with the vibration generating unit (2) and the flow monitoring unit (3). The ultrasonic-based centrifugal type bidirectional automatic-backwashing water-sediment separating device provided by the invention can depend on centrifugal layering of self-hydraulic power and a filter screen to conduct water-sediment separation, is high in filter precision, can keep internal cleaning of the filter screen through the centrifugal backwashing mechanism, and achieves the long-time high-efficiency filtered water quality.
Description
Technical field
The present invention relates to a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing, especially effectively utilize centrifugal layering and the two-way backwash principle of ultrasonic wave in transport of water process to the device that the solid-liquid two-phase flow containing silt is separated, belong to hydraulic engineering technical field.
Background technology
The Downstream of Yellow River water supply cause starts from phase early 1950s, develops into industrial and agricultural production, the comprehensive water supply of urban and rural residents' use water by initial agricultural water.For Lower Reaches of The Yellow River Shandong, irrigation areas 72 place of Lower Reaches of The Yellow River Shandong section more than ten thousand mu, designed irrigation area 236.8 ten thousand hm2, effective irrigation area 189.3 ten thousand hm2, yellow river water amount and draw that yellow irrigated area accounts for Shandong total water consumption and total irrigated area about 40%.Meanwhile, also for the Huang Jidian that diverts water via a canal from the yellow River into Qingdao, draws, the diversion of water from the Yellow River to Tianjin and Shengli Oil Field industry, life and coastal region people and animals water etc. provide reliable water source.Huanghe water has become the precious resources that Areas along Yellow River economic development and people depend on for existence, and social benefit, economic benefit and ecological benefits are huge.
Construction is drawn yellow engineering and must be considered the problem that silt is many.Draw Huanghe water just Yellow River mud to be extracted, silt 8,000,000 about the t drawn every year on average in recent years simultaneously.Silt content is large and thickness is uneven, and in river, sediment concentration reaches tens of even hundreds of kilograms every cubic metre, and what bulky grain sediment grain size had reaches decimeter grade, and fine sediment particle diameter has is less than 0.05mm.These fine sediments deal with very difficult, engineering by waterpower self-energy process silt under current dynamic condition is a lot, but it is helpless to the process being less than 0.05mm silt, this endangers and many inconvenience to water for industrial use and people's lives water-band greatly, in agricultural water, owing to containing a large amount of fine sediment in river, seriously constrain the promotion and application of the advanced water-saving technologies such as agriculture spray drop filling.
For above weak point, we devise a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing, centrifugal layering is only relied on to be separated water outlet with two-way backwash, isolated silt is all got rid of by self waterpower, and any other power and chemical agent need not be applied, its apparatus structure is simple, cheap, operating cost is low, convenient management.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of device relying on the centrifugal layering of self waterpower and screen pack to carry out the separation of water sand, this device is easy to the fine deposit that particle separation diameter is less than 0.05mm, and filtering accuracy is high; Further, the invention solves the cleaning problem of this device, by centrifugal backwash mechanism, keep screen pack cleaning inside, make the present invention can long-time high efficiency filtering water; Further, present invention achieves the Automated condtrol of water purification and cleaning, automatically clean, easy to operate, convenient management, operating cost is low, cheap, can be applied to market on a large scale, thus effectively advances the development of China's farmland water-saving irrigation cause.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Based on a water and sand separating device for hyperacoustic centrifugal two-way automatic back-washing, it is characterized in that: comprising: piping unit, vibration generating unit, water flow monitoring unit and automatic control unit; Described piping unit is arranged in described vibration generating unit, and described water flow monitoring unit is arranged in described piping unit, and described automatic control unit is connected with water flow monitoring unit electricity with described vibration generating unit;
Described piping unit comprises semi-circular pipeline, described semi-circular conduit upper is connected with outlet pipe, described semi-circular pipeline bottom is connected with water inlet pipe, described semi-circular pipeline is divided into symmetrical left arm and right arm by described outlet pipe and water inlet pipe, the bottom of described left arm and right arm is all connected with blow-off pipe, the inside of described left arm and right arm is provided with screen pack, described semi-circular pipeline, outlet pipe and blow-off pipe are provided with magnetic valve, described water flow monitoring unit is provided with in described outlet pipe and water inlet pipe, described water flow monitoring unit and magnetic valve are all connected with described automatic control unit electricity.
Described water flow monitoring unit comprises the import measurement instrument being positioned at described water inlet pipe and described semi-circular pipeline infall and the outlet measurement instrument being positioned at described outlet pipe and described semi-circular pipeline infall.
Water flow monitoring unit is used for monitoring water inlet pipe in the present invention and outlet pipe and semi-circular pipeline infall flow rate of water flow.
Described automatic control unit comprises data receiving processor, right data transmission circuit, left data transmission circuit and solenoid valve control circuit; Described data receiving processor is connected with described import measurement instrument by described right data transmission circuit; Described data receiving processor is connected with described outlet measurement instrument by described left data transmission circuit, described data receiving processor is connected with described magnetic valve by described solenoid valve control circuit, power circuit provides electric energy for described automatic control unit, and flow measurement data writing program is controlled the switch of described magnetic valve by described data receiving processor automatically.
Described magnetic valve comprises the 3rd magnetic valve on the second magnetic valve on the first magnetic valve on described outlet pipe, the described semi-circular pipeline between described water inlet pipe and left arm, the described semi-circular pipeline between described water inlet pipe and right arm, lay respectively at the 4th magnetic valve on 2 described blow-off pipes and the 5th magnetic valve.
Described data receiving processor receives the unlatching of import measurement instrument and outlet measurement instrument flow speed data write-in program automatic control electric magnet valve and supersonic generator, when flow velocity is less than the threshold value of setting (choosing of threshold value can require according to different quality and irrigation and change), described data receiving processor control circuit double circulating line carries out two-way backwash.
Described screen pack is some layers of classified filtering net, described in be classified as the described screen pack of some layers aperture successively increase, have spacing between adjacent described screen pack.
Described screen pack comprises four layers of classified filtering net, the aperture of the ground floor screen pack of described four layers of classified filtering net is 250 ~ 300 orders, the aperture of second layer screen pack is 150 ~ 180 orders, and the aperture of third layer screen pack is 80 ~ 100 orders, and the aperture of the 4th layer of screen pack is 20 ~ 30 orders.
Screen pack is placed in the articulation that size is harmonious, and both sides contact surface all have employed rubber washer.Such combination meets the requirement of firm antiseepage greatly, reduces the loss of flood peak, also ensures that screen pack can not offset or slippage under the souring of current, also alleviates the extrusion stress of material simultaneously simultaneously, reduces the possibility of screen pack distortion.
Adopt rotatable articulation can turn on dismounting at any time, when the screen pack in pipeline cannot ensure its result of use by backwash due to unexpected factor time, this joint can also be user-friendly for autonomous replacing and maintenance.
Described vibration generating unit comprises supersonic generator.
Described supersonic generator comprises left supersonic generator and right supersonic generator, described left supersonic generator is for controlling the vibration of the described screen pack being positioned at described left arm, and described right supersonic generator is for controlling the vibration of the described screen pack being positioned at described right arm.
Supersonic generator is fixed on the top of left arm and right arm.
When flow velocity is less than threshold value, automatic unlatching supersonic generator, ultrasonic vibration is delivered on each layer screen pack by solid pipeline and water body, removes the dirt of filter screen absorption on the one hand, utilizes the vibration of gaseous type bubble in liquid to clean the surface of solids on the other hand.
The application of sonotrode can coordinate two-way backwash mechanism, and the dirt of better more effective removal screen pack attachment, reduces filtration system wearing and tearing simultaneously, increase the service life.And the adjustability excellent due to it and clean-up performance, make it not only be applicable to the cleaning of slight irrigation water and sand separating device, can also carry out the cleaning of other pipelines or screen pack.
The generation power bracket of described supersonic generator, at 800 ~ 2000w, requires to set different power with irrigating according to different quality.
Described semi-circular pipeline is horizontal by 40 ~ 60 ° of placements, and the large ring radius of described semi-circular pipeline is at 1.5 ~ 1.8m, and described semi-circular pipeline water service pipe inside diameter ranges is at 0.2 ~ 0.3m.
The epimere of described water inlet pipe end, left arm and the epimere of right arm are provided with hydraulic pressure detector, and described hydraulic pressure detector is connected with described automatic control unit electricity.
The streamflow regime of the present invention under different operating state and operation principle:
(1) normal operating conditions: now left arm and right arm all filter.Now, the first magnetic valve, the second magnetic valve and the 3rd magnetic valve are all opened, and the 4th magnetic valve and the 5th magnetic valve are all closed.In general work situation, the impurity of the screen pack interception inside left arm and right arm is all fewer, and be not enough to cause the larger loss of flood peak, inflow-rate of water turbine is not greatly affected yet, and left arm and right arm can filter current simultaneously.Current flow to left arm and right arm at the second magnetic valve and the punishment of the 3rd magnetic valve, and after screen pack level Four is filtered, impurity is intercepted at this four layers of screen pack fronts successively by granular size.The water filtered flows to downstream line by delivery port and irrigates etc.But consider the backwash in later stage, two passages non-concurrent synchronous working, the alluvial degree so in two passages is different, so need to differentiate the need of the backwash carrying out left arm and right arm according to the head difference of left arm and right arm.
(2) right side backwash state: now by left arm filtration, right arm backwash.Now, the first magnetic valve, the 3rd magnetic valve and the 4th magnetic valve are all closed, the second magnetic valve and the 5th magnetic valve all open.In the normal work continued, level Four screen pack can tackle the most of impurity in water, and forms accumulation below screen pack, affects filter efficiency, increases the loss of flood peak.The larger loss of flood peak can be shown by the pressure difference value in the hydraulic pressure detector in pressure-measuring pipe (pressure-measuring pipe comprises water inlet pipe end, the epimere of left arm and right arm), automatically carries out backwash when reaching threshold value.First close the 4th magnetic valve and the first magnetic valve, the water after being filtered by left arm is introduced right arm and is carried out backwash.Because the effect of screen pack adsorption of sediment is weak, be deposited in sandstone earth below screen pack and be easy to depart from from screen pack under the impact of deadweight and current, flow through right side blow-off pipe with back-flushing and flow out.Backwash water is reused to water head site by special tuber drainage after flowing out the present invention.
(3) left side backwash state, now right arm filter, left arm backwash, now, the first magnetic valve, the second magnetic valve and the 5th magnetic valve are all closed, the 3rd magnetic valve and the 4th magnetic valve are all opened.Operation principle is with (2).Duty (1) is got back to after left arm recoil washes.
A kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing provided by the invention, adopt the structure of semi-circular pipeline, when drawing yellow irrigation, trash flow automatic centrifugal when semi-circular pipeline such as water and sand is separated, and four layers of gradient fractionation screen pack effectively remove irrigation impurity simultaneously; Utilize pressure reduction and two-way trans structure, can auto-flushing be realized, without the need to frequently changing cleaning, effectively removing the contamination and plugging thing of screen pack, finally causing the possibility of scrapping little, substantially prolongs parts service life; The keying of automatic control device switch, intelligent continuous firing, more easy and save time, compared with drawing the filter in yellow irrigation system with tradition, structure is simple, and volume is little, and be easy to installation and removal, and the requirement of irrigation system to irrigation water can be met, therefore can replace traditional Irrigation filter, realize filter effect better.No matter be that production and transport or installation are changed, all more traditional large-scale filtering tank is more cheap convenient, has good market prospects.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of automatic control unit in the present invention;
Fig. 3 is the side view of semi-circular pipeline in the present invention;
Fig. 4 is that the present invention filters working state schematic representation;
Fig. 5 is the present invention's right arm backwash view;
Fig. 6 is the present invention's left arm backwash view.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
Embodiment 1:
As shown in Fig. 1 ~ 6, a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing, is characterized in that: comprising: piping unit 1, vibration generating unit 2, water flow monitoring unit 3 and automatic control unit 4; Described piping unit 1 is arranged in described vibration generating unit 2, and described water flow monitoring unit 3 is arranged in described piping unit 1, and described automatic control unit 4 is connected with water flow monitoring unit 3 electricity with described vibration generating unit 2;
Described piping unit 1 comprises semi-circular pipeline 11, described semi-circular pipeline 11 top is connected with outlet pipe 12, described semi-circular pipeline 11 bottom is connected with water inlet pipe 13, described semi-circular pipeline 11 is divided into symmetrical left arm 14 and right arm 15 by described outlet pipe 12 and water inlet pipe 13, the bottom of described left arm 14 and right arm 15 is all connected with blow-off pipe 16, the inside of described left arm 14 and right arm 15 is provided with screen pack 17, described semi-circular pipeline 11, outlet pipe 12 and blow-off pipe 16 are provided with magnetic valve 18, described water flow monitoring unit 3 is provided with in described outlet pipe 12 and water inlet pipe 13, described water flow monitoring unit 3 and magnetic valve 18 are all connected with described automatic control unit 4 electricity.
Described water flow monitoring unit 3 comprises the import measurement instrument 31 being positioned at described water inlet pipe 13 and described semi-circular pipeline 11 infall and the outlet measurement instrument 32 being positioned at described outlet pipe 12 and described semi-circular pipeline 11 infall.
Described automatic control unit 4 comprises data receiving processor 41, right data transmission circuit 42, left data transmission circuit 43 and solenoid valve control circuit 44; Described data receiving processor 41 is connected with described import measurement instrument 31 by described right data transmission circuit 42; Described data receiving processor 41 is connected with described outlet measurement instrument 32 by described left data transmission circuit 43, described data receiving processor 41 is connected with described magnetic valve 18 by described solenoid valve control circuit 44, power circuit 45 provides electric energy for described automatic control unit 4, and flow measurement data writing program is controlled the switch of described magnetic valve 18 by described data receiving processor 41 automatically.
Described magnetic valve 18 comprises the 3rd magnetic valve 183 on the second magnetic valve 182 on the first magnetic valve 181 on described outlet pipe 12, the described semi-circular pipeline 11 between described water inlet pipe 13 and left arm 14, the described semi-circular pipeline 11 between described water inlet pipe 13 and right arm 15, lay respectively at the 4th magnetic valve 184 on 2 described blow-off pipes 16 and the 5th magnetic valve 185.
Described screen pack 17 is some layers of classified filtering net, described in be classified as the described screen pack 17 of some layers aperture successively increase, have spacing between adjacent described screen pack 17.
Described screen pack 17 comprises four layers of classified filtering net, the aperture of the ground floor screen pack 171 of described four layers of classified filtering net is 250 ~ 300 orders, the aperture of second layer screen pack 172 is 150 ~ 180 orders, the aperture of third layer screen pack 173 is 80 ~ 100 orders, and the aperture of the 4th layer of screen pack 174 is 20 ~ 30 orders.
Employing filtering material is the metal filter screen of four layers of different pore size, and its operation principle is:
Select 30 orders (aperture 0.1mm) as the 4th metafiltration net, can filtering coarse sand particles etc.;
Select 100 orders (150 μm, aperture) as third layer, can filtering major part medium sand particle;
Select 180 orders (80 μm, aperture) as the second layer, can filtering major part fine sand particle;
Select 300 orders (48 μm, aperture) as ground floor, can filtering major part sand grain and cotton-shaped impurity.
Described vibration generating unit 2 comprises supersonic generator.
Described supersonic generator comprises left supersonic generator 21 and right supersonic generator 22, described left supersonic generator 21 is for controlling the vibration of the described screen pack 17 being positioned at described left arm 14, and described right supersonic generator 22 is for controlling the vibration of the described screen pack 17 being positioned at described right arm 15.
Described semi-circular pipeline 11 is horizontal by 40 ~ 60 ° of placements, and the large ring radius of described semi-circular pipeline 11 is at 1.5 ~ 1.8m, and described semi-circular pipeline 11 water service pipe inside diameter ranges is at 0.2 ~ 0.3m.
Described water inlet pipe 13 end, the epimere of left arm 14 and the epimere of right arm 15 are provided with hydraulic pressure detector, and described hydraulic pressure detector is connected with described automatic control unit 4 electricity.
Embodiment 2:
As shown in Fig. 1 ~ 6, a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing,
The another kind of structure of screen pack is:
Select 20 orders as the 4th metafiltration net, can filtering coarse sand particles etc.;
Select 80 orders as third layer, can filtering major part medium sand particle;
Select 150 orders as the second layer, can filtering major part fine sand particle;
Select 250 orders as ground floor, can filtering major part sand grain and cotton-shaped impurity.
All the other contents are identical with the content in embodiment 1.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. based on a water and sand separating device for hyperacoustic centrifugal two-way automatic back-washing, it is characterized in that: comprising: piping unit (1), vibration generating unit (2), water flow monitoring unit (3) and automatic control unit (4); Described piping unit (1) is arranged in described vibration generating unit (2), described water flow monitoring unit (3) is arranged in described piping unit (1), and described automatic control unit (4) is connected with water flow monitoring unit (3) electricity with described vibration generating unit (2);
Described piping unit (1) comprises semi-circular pipeline (11), described semi-circular pipeline (11) top is connected with outlet pipe (12), described semi-circular pipeline (11) bottom is connected with water inlet pipe (13), described semi-circular pipeline (11) is divided into symmetrical left arm (14) and right arm (15) by described outlet pipe (12) and water inlet pipe (13), the bottom of described left arm (14) and right arm (15) is all connected with blow-off pipe (16), the inside of described left arm (14) and right arm (15) is provided with screen pack (17), described semi-circular pipeline (11), outlet pipe (12) and blow-off pipe (16) are provided with magnetic valve (18), described water flow monitoring unit (3) is provided with in described outlet pipe (12) and water inlet pipe (13), described water flow monitoring unit (3) and magnetic valve (18) are all connected with described automatic control unit (4) electricity.
2. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 1, is characterized in that: described water flow monitoring unit (3) comprises the import measurement instrument (31) being positioned at described water inlet pipe (13) and described semi-circular pipeline (11) infall and the outlet measurement instrument (32) being positioned at described outlet pipe (12) and described semi-circular pipeline (11) infall.
3. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 2, is characterized in that: described automatic control unit (4) comprises data receiving processor (41), right data transmission circuit (42), left data transmission circuit (43) and solenoid valve control circuit (44); Described data receiving processor (41) is connected with described import measurement instrument (31) by described right data transmission circuit (42); Described data receiving processor (41) is connected with described outlet measurement instrument (32) by described left data transmission circuit (43), described data receiving processor (41) is connected with described magnetic valve (18) by described solenoid valve control circuit (44), power circuit (45) provides electric energy for described automatic control unit (4), and flow measurement data writing program is controlled the switch of described magnetic valve (18) by described data receiving processor (41) automatically.
4. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 1, it is characterized in that: described magnetic valve (18) comprises the first magnetic valve (181) be positioned on described outlet pipe (12), be positioned at the second magnetic valve (182) on the described semi-circular pipeline (11) between described water inlet pipe (13) and left arm (14), be positioned at the 3rd magnetic valve (183) on the described semi-circular pipeline (11) between described water inlet pipe (13) and right arm (15), lay respectively at the 4th magnetic valve (184) on 2 described blow-off pipes (16) and the 5th magnetic valve (185).
5. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 1, it is characterized in that: described screen pack (17) is some layers of classified filtering net, the described aperture being classified as the described screen pack of some layers (17) successively increases, and has spacing between adjacent described screen pack (17).
6. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 5, it is characterized in that: described screen pack (17) comprises four layers of classified filtering net, the aperture of the ground floor screen pack (171) of described four layers of classified filtering net is 250 ~ 300 orders, the aperture of second layer screen pack (172) is 150 ~ 180 orders, the aperture of third layer screen pack (173) is 80 ~ 100 orders, and the aperture of the 4th layer of screen pack (174) is 20 ~ 30 orders.
7. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 1, is characterized in that: described vibration generating unit (2) comprises supersonic generator.
8. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 7, it is characterized in that: described supersonic generator comprises left supersonic generator (21) and right supersonic generator (22), described left supersonic generator (21) is for controlling the vibration being positioned at the described screen pack (17) of described left arm (14), and described right supersonic generator (22) is for controlling the vibration being positioned at the described screen pack (17) of described right arm (15).
9. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 1, it is characterized in that: described semi-circular pipeline (11) is horizontal by 40 ~ 60 ° of placements, the large ring radius of described semi-circular pipeline (11) is at 1.5 ~ 1.8m, and described semi-circular pipeline (11) water service pipe inside diameter ranges is at 0.2 ~ 0.3m.
10. a kind of water and sand separating device based on hyperacoustic centrifugal two-way automatic back-washing according to claim 1, it is characterized in that: the epimere of described water inlet pipe (13) end, left arm (14) and the epimere of right arm (15) are provided with hydraulic pressure detector, and described hydraulic pressure detector is connected with described automatic control unit (4).
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| CN201410617563.5A CN104353276A (en) | 2014-11-05 | 2014-11-05 | Ultrasonic-based centrifugal type bidirectional automatic-backwashing water-sediment separating device |
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| CN201410617563.5A CN104353276A (en) | 2014-11-05 | 2014-11-05 | Ultrasonic-based centrifugal type bidirectional automatic-backwashing water-sediment separating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105776611A (en) * | 2016-04-12 | 2016-07-20 | 中国农业科学院农业资源与农业区划研究所 | Method for removing undigested matter in anaerobic digestive liquid and preparing organic liquid fertilizer base fluid |
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| CN2662977Y (en) * | 2003-12-22 | 2004-12-15 | 新疆水利水电科学研究院 | Improved water filter for water-saving irrigation |
| CN1765466A (en) * | 2005-08-19 | 2006-05-03 | 范义河 | Water treatment equipment |
| CN101121082A (en) * | 2006-08-10 | 2008-02-13 | 朱少华 | Cone type multi-group filter net water filtering device |
| CN101784347A (en) * | 2006-05-02 | 2010-07-21 | 布赖恩·爱德华·戈尼南 | Fluid purification using hydraulic vortex systems |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2662977Y (en) * | 2003-12-22 | 2004-12-15 | 新疆水利水电科学研究院 | Improved water filter for water-saving irrigation |
| CN1765466A (en) * | 2005-08-19 | 2006-05-03 | 范义河 | Water treatment equipment |
| CN101784347A (en) * | 2006-05-02 | 2010-07-21 | 布赖恩·爱德华·戈尼南 | Fluid purification using hydraulic vortex systems |
| CN101121082A (en) * | 2006-08-10 | 2008-02-13 | 朱少华 | Cone type multi-group filter net water filtering device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105776611A (en) * | 2016-04-12 | 2016-07-20 | 中国农业科学院农业资源与农业区划研究所 | Method for removing undigested matter in anaerobic digestive liquid and preparing organic liquid fertilizer base fluid |
| CN105776611B (en) * | 2016-04-12 | 2018-07-27 | 中国农业科学院农业资源与农业区划研究所 | It is not digested object and organic fertilizer base fluid preparation method in removal anaerobic digestion solution |
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Application publication date: 20150218 |