CN202052400U - Turntable type ultrasonic wave self cleaning micro filter - Google Patents
Turntable type ultrasonic wave self cleaning micro filter Download PDFInfo
- Publication number
- CN202052400U CN202052400U CN2011201437633U CN201120143763U CN202052400U CN 202052400 U CN202052400 U CN 202052400U CN 2011201437633 U CN2011201437633 U CN 2011201437633U CN 201120143763 U CN201120143763 U CN 201120143763U CN 202052400 U CN202052400 U CN 202052400U
- Authority
- CN
- China
- Prior art keywords
- cleaning
- ultrasonic wave
- disk body
- type ultrasonic
- filtration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a turntable type ultrasonic wave self cleaning micro filter, which relates to the field of sewage treatment and comprises a box body, a main filtering system and a cleaning system, wherein the main filter system is arranged in the box body and comprises a filter disc body. The turntable type ultrasonic wave self cleaning micro filter is characterized in that the cleaning system comprises a reverse suction assembly and a mud discharge assembly, an ultrasonic wave cleaning assembly is arranged between the upper part of a mud discharge pipeline and the filtering disc body, and a control system judges the blockage degree of the filter disc body according to the liquid level of a water filtering region and automatically controls the work time of the ultrasonic wave cleaning assembly, the reverse suction assembly and the mud discharge assembly. Because of the adoption of the ultrasonic wave filtering assembly, the reverse suction times are greatly reduced, the abrasion of the whole equipment is reduced, the energy consumption is reduced, and because of the adoption of the one-step simultaneous cleaning on each filter disc body, the cleaning procedure is simplified. The turntable type ultrasonic wave self cleaning micro filter can be widely applied to occasions such as surface water purification, sewage deep treatment and the like.
Description
Technical field
The utility model relates to sewage disposal device, is specifically related to a kind of rotating disc type ultrasonic wave self-cleaning Microfilter.
Background technology
Fibre turntable filters and belongs to a kind of depth-type filtration technology, can be widely used in surface water purification, advanced treatment of wastewater, is particularly suitable for municipal sewage plant's discharging transformation and reason field, reusing sewage depths.The fibre turntable filtration system is composed in series by the parallel filtration disk body that vertically is installed on the central cylinder that is used to support filter cloth, the filtration disk body quantity of one covering device is generally 2～20, each filters disk body and is combined by the fan-shaped filter disc of 6 fritters, and every fan-shaped filter disc is surrounded by the fiber hair filter cloth outward.Though the fibre turntable filter that uses is of many uses at present, still has the following disadvantages:
1, because the filter capacity of filter cloth in filtration reduces comparatively fast, needs more frequent startup back suction sucking pump, thereby reduced operating efficiency, accelerated equipment attrition.
2, filter cloth cleans and adopts subregion to clean, and the cleaning frequency is long, and efficient is low, the control system complexity, and the pipeline installation difficulty is big, and the filter cloth wearing and tearing are big, and service life is short, and power consumption is also big.
3, because each filtration disk body is combined by several pieces fan-shaped filter discs, lack reinforcement measure, filter disc and filter disc are separate, and whole filtering table body disc surface evenness is poor, is difficult for adjusting, and filter cloth is easily crumpled.
4, circular central cylindrical shell periphery adds six side's connectors, and the processing and manufacturing difficulty is big, the manufacturing cost height, central cylinder welding is yielding, and water passing capacity is poor, is connected easily between disc and the disc to misplace, sucker easily deforms in dislocation place, and filter cloth is also easily worn out in dislocation place, and cleaning performance is poor.
5, sucker directly contacts with filter cloth, and filter cloth is easy to wear, and filter cloth is short service life, and cleaning performance is relatively poor.
6, the water level of effluent trough is regulated and is used valve regulated, easily forms vortex when the water yield is big, influences filter effect.
The utility model content
The purpose of this utility model provides a kind of rotating disc type ultrasonic wave self-cleaning Microfilter, and it can not only make filters the lasting filter capacity of disk body maintenance, increases work efficiency, and can reduce the number of times that back suction is inhaled, thereby reduce the wearing and tearing of entire equipment.
The technical scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of rotating disc type ultrasonic wave self-cleaning Microfilter, comprise casing, main filtration system and purging system, described main filtration system is installed in the described casing, described main filtration system comprises the filtration disk body, be characterized in: described purging system comprises megasonic cleaning module, back suction is inhaled assembly and spoil disposal assembly, described spoil disposal assembly comprises the sludge pump that is arranged on the casing outside and is arranged at the spoil disposal pipeline of bottom half, between the top of described spoil disposal pipeline and described filtration disk body, be provided with described megasonic cleaning module, described back suction is inhaled assembly and is comprised sucker, the back suction sucking pump, described sucker is connected by pipeline with described back suction sucking pump, and described sucker is installed in the both sides of described filtration disk body and keeps spacing with the filtration disk body.The quantity of sucker, back suction sucking pump matches with described filtration disk body.
It is corresponding with the interstitial site between the described adjacent filtration disk body that described megasonic cleaning module is provided with the position, and the quantity of its quantity and filtration disk body matches.
Described casing comprises inhalant region, filtered water section and clear water discharge area, the lateral wall of described inhalant region is provided with water inlet, be provided with preceding overflow plate between described inhalant region and the filtered water section, before described, be provided with on the excessive plate and can adjust weir plate and water inlet valve plate, be provided with the back overflow plate in described clear water discharge area front portion, on the overflow plate of described back, be provided with adjustable weir plate and leading screw adjusting device, on the lateral wall of described clear water discharge area, be provided with delivery port.Described casing is stainless steel casing or mixed earth pond body.
Described main filtration system comprises central cylinder, filters disk body and transmission system, described filtration disk body is fixedly mounted on the central cylinder, its inner chamber is communicated with central cylinder, the front end sealing of described central cylinder, the rear end is that discharge ends is communicated with described clear water discharge area by intercommunicating pore, described transmission system comprises driving chain and rotation system, and described central cylinder is connected with rotation system by chain, described main filtration system by preceding support and after be supported and fixed on the inside of casing.The cross section of described central cylinder is a hexagon, and cylindrical shell adopts two dividing plates to reinforce by the place, two ends.
Described filtration disk body is provided with more than two groups at least, and every group is filtered disk body and be formed by connecting by six filtration discs.
Rotating disc type ultrasonic wave self-cleaning Microfilter of the present utility model also comprises control system, and described control system comprises PLC controller, liquid level sensor and ultrasonic power, and described liquid level sensor is installed on the filtered water section of described casing.
Operation principle of the present utility model is: sewage flows into inhalant region by water inlet, evenly flow into filtered water section through the water inlet valve plate and after can adjusting the weir plate adjustment, sewage enters central cylinder after filter cloth on the disk body filters and is discharged to the clear water discharge area by linked hole through filtering.And an impurity part has been stayed on the filter cloth, the remaining bottom half that then is deposited in.
Be provided with the adjustable weir plate of band saw dentation in the clear water discharge area, can regulate the pressure reduction of filtered water section and clear water discharge area by the adjustable weir plate of band saw dentation.
The filtration of equipment is continuous, and purging system is idle usually, growth along with filtration time, the filter cloth water passing capacity reduces, the reason that reduces is because the impurity that the filter cloth surface has is more and more many, will cause that like this liquid level in the filtering ponds increases, by liquid level sensor liquid level signal is sent to Programmable Logic Controller PLC, PLC requires to send signal according to setting, start megasonic cleaning module work, filter cloth is carried out auto-ultrasonic clean, megasonic cleaning module sends ultrasonic wave makes the impurity that coheres on filter cloth be shed to bottom half.When the sediment of bottom half gathers to a certain degree, start sludge pump by PLC control and sediment is extracted into outside the casing by the spoil disposal pipeline; Carrying out along with sewage disposal, because the resistance of filter cloth increases, the drainage liquid level can continue to increase in the casing, when arriving to a certain degree, transmission component drives central cylinder and rotates, back suction suction assembly is started working, and the back suction sucking pump filters disk body suction to each group simultaneously by sucker, and the impurity that will cohere on filter cloth is removed.Spoil disposal assembly and back suction are inhaled assembly and also are in intermittent duty, specifically look the congestion situations of filtering the filter cloth on the disk body and determine.
The beneficial effects of the utility model: the one, owing to adopt megasonic cleaning module, significantly reduced the number of times that back suction is inhaled, reduce the wearing and tearing of entire equipment, increase the service life of equipment, and reduced energy consumption, energy efficient is about 1/3rd; The 2nd, owing to be that employing is disposable each filtration disk body to be cleaned simultaneously, program is simple, and is stable, also reduced the workload of debugging; Because the cross section of described central cylinder is a hexagon, and two ends adopt two dividing plates to reinforce, and have guaranteed the axiality of cylindrical shell and have prevented the flexural deformation of cylindrical shell, have improved the strainability of equipment.
On the basis of technique scheme, the utility model can also be done following improvement:
Further, described filtration disk body is provided with the draw runner that can make filter cloth and sucker keep suitable distance, and described draw runner is looped around the two sides of described filtration disk body.Adopt the beneficial effect of above-mentioned further scheme to be: to the wearing and tearing of filter cloth, filter cloth cleans more thorough when having avoided back suction to inhale, and greatly reduces the service life and the filter cloth wearing and tearing of filter cloth.
Further, form between the adjacent filtration disc of described filtration disk body and fix by connector.This connector is wrapped in filtering table body periphery, makes that forming the filtration disc that filters disk body becomes an integral body.The intensity and the card flatness of filtering disk body have further been strengthened.
Further, the weir plate of described clear water discharge area front portion is the adjustable weir plate of band saw dentation.It is compared with valve regulated, has avoided when the water yield is big easily forming vortex and the defective that influences filter effect.
Description of drawings
Fig. 1 is the structural representation of a kind of rotating disc type ultrasonic wave of the utility model self-cleaning Microfilter:
Fig. 2 is the structural representation that A-A adjusts weir plate among Fig. 1 to the clear water exclusion zone;
Fig. 3 is a drive mechanism schematic diagram of the present utility model;
Fig. 4 is a central cylinder structural representation of the present utility model;
Fig. 5 is a filtering table body structure schematic diagram of the present utility model;
Fig. 6 is that the A-A of Fig. 5 is to cutaway view;
Fig. 7 is the partial enlarged drawing of Fig. 5;
Fig. 8 is that the B of Fig. 5 is to partial enlarged drawing;
Fig. 9 is that back suction of the present utility model is inhaled the apparatus structure schematic diagram.
In Fig. 1-Fig. 9,1, casing, 2, the clear water discharge area, 3, intercommunicating pore, 4, main filtration system, 6, the spoil disposal pipeline, 7, megasonic cleaning module, 8, filter disk body, 9, sludge pump, 10, filtered water section, 11, inhalant region, 12, can adjust weir plate, 13, the water inlet valve plate, 14, water inlet, 15, the preceding support, 16, sucker, 17, the back suction sucking pump, 18, central cylinder, 19, the back is supported, and 20, driving chain, 21, rotation system, 22, adjustable weir plate, 23, the leading screw adjusting device, 24, control system, 25, delivery port, 26, draw runner, 27, dividing plate, 28, connector, 29, liquid level sensor.
The specific embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.
As Fig. 1--shown in Figure 9, a kind of rotating disc type ultrasonic wave self-cleaning Microfilter comprises casing 1, main filtration system 4 and purging system, and described main filtration system 4 is installed in the described casing 1, and described main filtration system 4 comprises filters disk body 8.Described purging system comprises megasonic cleaning module 7, back suction suction assembly and spoil disposal assembly, described spoil disposal assembly comprises the sludge pump 9 that is arranged on casing 1 outside and is arranged at the spoil disposal pipeline 6 of casing 1 bottom, between the top of described spoil disposal pipeline 6 and described filtration disk body 8, be provided with described megasonic cleaning module 7, described back suction is inhaled assembly and is comprised sucker 16, back suction sucking pump 17, described sucker 16 and described back suction sucking pump 17 are connected by pipeline, described sucker 16 be installed in described filtration disk body 8 both sides and with filter disk body 8 and keep spacings.The quantity of sucker 16, back suction sucking pump 17 matches with described filtration disk body 8.It is corresponding with the interstitial site between the described adjacent filtration disk body 8 that megasonic cleaning module 7 is provided with the position, and the quantity of its quantity and filtration disk body 8 matches.
Described casing 1 comprises inhalant region 11, filtered water section 10 and clear water discharge area 2, the lateral wall of described inhalant region 11 is provided with water inlet 14, be provided with preceding overflow plate between described inhalant region 11 and the filtered water section 10, on preceding excessive plate, be provided with and adjust weir plate 12 and water inlet valve plate 13, be provided with the back overflow plate in clear water discharge area 2 front portions, on the overflow plate of back, be provided with adjustable weir plate 22 and leading screw adjusting device 23, on the lateral wall of clear water discharge area 2, be provided with delivery port 25.Described casing 1 is stainless steel casing or mixed earth pond body.Weir plate 22 in the back on the overflow plate is adjustable weir plates of band saw dentation, and it is compared with valve regulated, has avoided easily forming vortex when the water yield is big and the defective that influences filter effect.
Described main filtration system comprises central cylinder 18, filters disk body 8 and transmission system.Center in central cylinder 18 is provided with rotating shaft, and central cylinder 18 is fixed as one with rotating shaft, and the rotating shaft of central cylinder 18 is erected at the inside of casing 1 by preceding support 15 and back support 19.The front end sealing of central cylinder 18, the rear end is a discharge ends, the discharge ends of described central cylinder 18 is communicated with described clear water discharge area 2 by intercommunicating pore 3.Every group of filtration disk body 8 is fixedly mounted on the central cylinder 18, and card is filtered disk body 8 inner chambers and is communicated with central cylinder 18 perpendicular to rotating shaft.Transmission system comprises driving chain 20 and rotation system 21, and institute's central cylinder 18 is connected with rotation system 21 by driving chain 20, and the cross section of central cylinder 18 is hexagons, is provided with two dividing plates 27 at the place, two ends of leaning on of central cylinder 18.
Described filtration disk body 8 is provided with more than two groups at least, is provided with 12 groups in this example, and every group is filtered disk body 8 and be formed by connecting by six filtration discs.Fixing by connector 28 between the adjacent filtration disc that filters disk body 8, this connector 28 is wrapped in and filters disk body 8 peripheries, makes that forming the filtration disc that filters disk body 8 becomes an integral body.The intensity and the card flatness of filtering disk body 8 have further been strengthened.
Filter and also be provided with the draw runner 26 that can make filter cloth and sucker 16 keep suitable distance on the disk body 8, described draw runner 26 is looped around the two sides of described filtration disk body 8.To the wearing and tearing of filter cloth, filter cloth cleans more thorough in the time of avoiding back suction to inhale like this, greatly reduces the service life and the filter cloth wearing and tearing of filter cloth.
Rotating disc type ultrasonic wave self-cleaning Microfilter of the present utility model also comprises control system, and described control system comprises PLC controller, liquid level sensor 29 and ultrasonic power, and described liquid level sensor 29 is installed on the inwall of described casing filtered water section 11.
The operation principle of this machine is: sewage flows into inhalant region 11 by water inlet 14, through water inlet valve plate 13 and can adjust weir plate 12 and adjust the back and evenly flow into filtered water section 10, sewage enters central cylinder 18 after filter cloth on the disk body 8 filters and is discharged to clear water discharge area 2 by linked hole 3 through filtering.And an impurity part has been stayed on the filter cloth, the remaining bottom that then is deposited in casing 1.
By the adjustable weir plate 22 of band saw dentation in the clear water discharge area 2, can regulate the pressure reduction of filtered water section 10 and clear water discharge area 2.
The filtration of equipment is continuous, and purging system is idle usually, growth along with filtration time, the filter cloth water passing capacity reduces, the reason that reduces is because the impurity that the filter cloth surface has is more and more many, will cause that like this liquid level in the filtering ponds increases, by liquid level sensor 29 liquid level signal is sent to Programmable Logic Controller PLC, PLC requires to send signal according to setting, start megasonic cleaning module 7 work, filter cloth is carried out the auto-ultrasonic filtering wash, megasonic cleaning module 7 sends the bottom that the feasible impurity that coheres on filter cloth of ultrasonic wave is shed to casing 1.When the sediment of bottom half gathers to a certain degree, start sludge pump 9 by PLC control and sediment is extracted into outside the casing by spoil disposal pipeline 6; Carrying out along with sewage disposal, because the resistance of filter cloth increases, the drainage liquid level can continue to increase in the casing, when arriving to a certain degree, transmission component drives central cylinder 18 and rotates, back suction suction assembly is started working, and back suction sucking pump 17 filters disk body 8 suctions to each group simultaneously by sucker 16, and the impurity that will cohere on filter cloth is removed.Spoil disposal assembly and back suction are inhaled assembly and also are in intermittent duty, specifically look the congestion situations of filtering the filter cloth on the disk body 8 and determine.
The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. rotating disc type ultrasonic wave self-cleaning Microfilter, comprise casing (1), main filtration system (4) and purging system, described main filtration system (4) is installed in the described casing (1), described main filtration system (4) comprises filters disk body (8), it is characterized in that: described purging system comprises megasonic cleaning module (7), back suction is inhaled assembly and spoil disposal assembly, described spoil disposal assembly comprises the spoil disposal pipeline (6) that is arranged on the outside sludge pump (9) of casing (1) and is arranged at casing (1) bottom, between the top of described spoil disposal pipeline and described filtration disk body (8), be provided with described megasonic cleaning module (7), described back suction is inhaled assembly and is comprised sucker (16), back suction sucking pump (17), described sucker (16) is connected by pipeline with described back suction sucking pump (17), and described sucker (16) is installed in the both sides of described filtration disk body (8) and keeps spacing with filtration disk body (8).
2. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 1, it is characterized in that: it is corresponding with the interstitial site between the described adjacent filtration disk body (8) that described megasonic cleaning module (7) is provided with the position, and the quantity of its quantity and filtration disk body (8) is supporting.
3. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 1, it is characterized in that: described casing (1) comprises inhalant region (11), filtered water section (10) and clear water discharge area (2), the lateral wall of described inhalant region (11) is provided with water inlet (14), be provided with preceding overflow plate between described inhalant region (11) and the filtered water section (10), before described, be provided with on the overflow plate and can adjust weir plate (12) and water inlet valve plate (13), be provided with the back overflow plate in described clear water discharge area (2) front portion, on the overflow plate of described back, be provided with adjustable weir plate (22) and leading screw adjusting device (23), on the lateral wall of described clear water discharge area (2), be provided with delivery port (25).
4. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 3 is characterized in that: described casing (1) is stainless steel casing or mixed earth pond body.
5. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 1, it is characterized in that: described main filtration system (4) comprises central cylinder (18), filter disk body (8) and transmission system, described filtration disk body (8) is fixedly mounted on the central cylinder (18), its inner chamber is communicated with central cylinder (18), the front end sealing of described central cylinder (18), the rear end is that discharge ends is passed through intercommunicating pore (3) and is communicated with described clear water discharge area (2), described transmission system comprises driving chain (20) and rotation system (21), described central cylinder (18) is connected with rotation system (21) by driving chain (20), and described main filtration system (4) supports the inside that (19) are fixed on casing (1) by preceding support (15) and back.
6. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 5, it is characterized in that: the cross section of described central cylinder (18) is a hexagon.
7. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 5, it is characterized in that: described filtration disk body (8) is provided with the draw runner (26) that can make filter cloth and sucker keep suitable distance, and described draw runner (26) is looped around the two sides of described filtration disk body (8).
8. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 5, it is characterized in that: described filtration disk body (8) is more than two groups at least, every group is filtered disk body (8) and comprises that six are filtered disc.
9. rotating disc type ultrasonic wave self-cleaning Microfilter according to claim 8 is characterized in that: form between the adjacent filtration disc of described filtration disk body (8) fixing by connector (28).
10. according to each described rotating disc type ultrasonic wave self-cleaning Microfilter of claim 1-9, it is characterized in that: also comprise control system (24), described control system comprises PLC controller, liquid level sensor (29) and ultrasonic power, and described liquid level sensor is installed on the filtered water section (10) of described casing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201437633U CN202052400U (en) | 2011-05-09 | 2011-05-09 | Turntable type ultrasonic wave self cleaning micro filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201437633U CN202052400U (en) | 2011-05-09 | 2011-05-09 | Turntable type ultrasonic wave self cleaning micro filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202052400U true CN202052400U (en) | 2011-11-30 |
Family
ID=45012387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201437633U Expired - Lifetime CN202052400U (en) | 2011-05-09 | 2011-05-09 | Turntable type ultrasonic wave self cleaning micro filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202052400U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188852A (en) * | 2011-05-09 | 2011-09-21 | 烟台桑尼核星环保设备有限公司 | Rotating-disc type ultrasonic self-cleaning microstrainer |
-
2011
- 2011-05-09 CN CN2011201437633U patent/CN202052400U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188852A (en) * | 2011-05-09 | 2011-09-21 | 烟台桑尼核星环保设备有限公司 | Rotating-disc type ultrasonic self-cleaning microstrainer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209530279U (en) | A kind of sewage treatment fibre turntable formula filter device | |
| CN207950853U (en) | A kind of fibre turntable filter chamber | |
| CN2910324Y (en) | Micro solid/liquid separator | |
| CN106693480A (en) | Brush type self-washing filter | |
| CN210021359U (en) | A effluent treatment plant for resin production | |
| CN102188852B (en) | Rotating-disc type ultrasonic self-cleaning microstrainer | |
| CN206483216U (en) | A kind of brush type self-cleaning filter | |
| CN202052400U (en) | Turntable type ultrasonic wave self cleaning micro filter | |
| CN104208941A (en) | Fiber rotary disk filtration tank | |
| CN103263801A (en) | Fully-automatic rotary fiber disk microfiltration machine for deep treatment of sewage | |
| KR20160004499A (en) | Drum Screen Device for Water Purification | |
| CN207986740U (en) | A kind of full-automatic molten gas algae removal device | |
| KR100926078B1 (en) | Apparatus for purifying waste water | |
| CN108558022B (en) | Fluidized bed sewage treatment device | |
| CN204147638U (en) | Fibre turntable filter chamber | |
| CN1429648A (en) | Microfilter | |
| CN103520972B (en) | A kind of filtering cloth filtering pool for water treatment | |
| CN110104832A (en) | A kind of simple rural domestic sewage treating device of assembly type | |
| CN101941781A (en) | Filtering system of suspended solids in sewage | |
| CN201501818U (en) | Efficient catalytic oxidation filter | |
| CN201842695U (en) | Wastewater suspended substance filter system | |
| CN208512034U (en) | Efficient rotary disc filter | |
| CN201433115Y (en) | Barrate grille for waste-water pretreatment | |
| CN208212676U (en) | For advanced treatment of wastewater and the partially submerged turntable filter chamber of Treated sewage reusing | |
| CN101928081A (en) | Biogas residue and biogas liquid treatment machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111130 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |