CN110681679A - Continuous impurity removal treatment system for kitchen waste - Google Patents
Continuous impurity removal treatment system for kitchen waste Download PDFInfo
- Publication number
- CN110681679A CN110681679A CN201911098984.0A CN201911098984A CN110681679A CN 110681679 A CN110681679 A CN 110681679A CN 201911098984 A CN201911098984 A CN 201911098984A CN 110681679 A CN110681679 A CN 110681679A
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- stirring
- tank body
- pivot
- kitchen waste
- conveying groove
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- 239000010806 kitchen waste Substances 0.000 title claims description 24
- 239000012535 impurity Substances 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims description 48
- 239000004576 sand Substances 0.000 claims description 38
- 238000007599 discharging Methods 0.000 claims description 33
- 239000002002 slurry Substances 0.000 claims description 11
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 5
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000029087 digestion Effects 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000010796 biological waste Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The utility model provides a continuous edulcoration processing system of kitchen garbage, which comprises a supporting fram, the material conveyer trough of horizontal extension about the support frame top is provided with, be provided with the filter of taking the filtration pore between material conveyer trough bottom and the oil storage water tank top, radial extension has a plurality of groups to dial the material subassembly on the periphery of pivot, it is tangent with material conveyer trough interior bottom upper surface place plane of bottom lower surface place curved surface of dialling the terminal bottom of material pole, it leaks the material space to leave between two adjacent dialling the material pole, the pivot right side is provided with the subassembly of unloading that a set of high-low slope set up about, the subassembly of unloading includes a plurality of along the unloading pole side by side of pivot. The invention has the beneficial effects that: can separate out the inorganic matter in the kitchen garbage through mechanical equipment in succession, save the manual work, greatly reduced the cost of labor, reduce the input cost, save occupation space.
Description
Technical Field
The invention relates to a continuous impurity removal treatment system for kitchen waste.
Background
The kitchen waste is biological waste formed after processing food and catering in canteens, restaurants, dining rooms and the like, is extremely easy to rot and deteriorate, emits stink, and spreads bacteria and diseases. With the continuous improvement of living standard of people and the increase of large commercial hotels and restaurants, more and more kitchen waste is present in front of people, and if the kitchen waste cannot be timely and effectively treated, a series of problems of environmental pollution and harm to human health can be caused.
The kitchen waste treatment system on the market at present comprises components such as rubbing crusher screw conveyer and oil storage water tank, and rubbish gets into the fermentation case fermentation through broken decrement screw extrusion etc.. However, before the garbage enters the equipment, inorganic substances such as garbage bags, disposable gloves, lunch boxes, water cups and the like are generally separated manually, the labor cost is high, the separation efficiency is low, the inorganic substances enter the equipment occasionally, the performance of the whole equipment is influenced, and even the equipment is shut down and stops production.
The kitchen waste accounts for 30% -50% of the total amount of the municipal solid waste, the kitchen waste is generally required to be pretreated firstly in the process of harmless, resource and reduction treatment of the kitchen waste, the pretreatment steps generally comprise sorting, deoiling, homogenizing, desanding and the like, even in the anaerobic digestion process of the kitchen waste, the solid content of the pretreated feed has a clear requirement, and the solid content has an important influence on the anaerobic digestion in actual engineering. However, the solid content of discharged materials cannot be controlled by the traditional homogenizing equipment, so that engineers with abundant experience are required to operate the equipment, and the solid content of discharged materials is measured for many times to adjust, so that the difficulty degree of kitchen waste treatment is greatly increased.
Disclosure of Invention
In order to overcome the technical defects, the invention provides the continuous impurity removal treatment system for the kitchen waste, which is convenient to use, labor-saving, high in treatment efficiency and production efficiency.
The invention is realized by the following measures:
a kitchen waste continuous impurity removal treatment system comprises a support frame, wherein a material conveying groove transversely extending left and right is arranged at the top of the support frame, a feed inlet is formed in the top of the left side of the material conveying groove, a screw conveyor is arranged at the end of the left side of the material conveying groove, a rotating shaft is longitudinally erected at the right side of the material conveying groove, an oil storage water tank is arranged below the material conveying groove between the rotating shaft and the screw conveyor, a filter plate with filter holes is arranged between the bottom of the material conveying groove and the top of the oil storage water tank, a driving motor connected with the rotating shaft in a driving mode is arranged on the support frame, a plurality of groups of material stirring assemblies radially extend on the circumferential surface of the rotating shaft, each group of material stirring assemblies comprises a plurality of material stirring rods which are axially arranged side by side along the rotating shaft, each material stirring rod is an arc with the tail end bent leftwards and smooth transition in the middle, leave between two adjacent kickoff poles and leak the material space, the pivot right side is provided with the subassembly of unloading that a set of high low slope in the right side set up, the subassembly of unloading includes a plurality of discharge arm side by side along the pivot axial, the pivot surface is pressed close to the discharge arm left end, and the discharge arm right-hand member extends to the material conveyer trough outer and the below has been accepted and has been deposited the case, and the discharge arm passes from leaking the material space when the pivot drives the kickoff subassembly rotation, the material conveyer trough bottom on pivot right side is provided with the discharge gate, the discharge gate has the material import of rubbing crusher through the tube coupling, there is the homogenate device rubbing crusher's material export through the tube coupling.
The homogenizing device comprises a tank body, a stirring motor is arranged at the center of the top of the tank body, the stirring motor is in driving connection with a central water outlet pipe vertically extending to the position of a central shaft in the tank body, the two sides of the upper part of the central water outlet pipe are symmetrically connected with cross rods, the tail ends of the cross rods are connected with vertical stirring rods, a plurality of rotating transverse shafts are transversely arranged on the inner sides of the vertical stirring rods, stirring blades are rotatably connected onto the rotating transverse shafts, a slurry inlet is formed in the top of the tank body, a plurality of water outlet holes are formed in the pipe wall of the central water outlet pipe, a rotary viscometer is arranged at the bottom of the central water outlet pipe, a slurry outlet is formed in the lower portion of the tank body, a recovery water pipe is connected between the bottom of the oil storage water tank and the slurry inlet of the tank body, the recycling water pipe is provided with a water pump, the upper part of the oil storage water tank is provided with an oil discharge port, the bottom of the oil storage water tank is provided with a drain outlet, and a transfer trolley is connected below the drain outlet and the oil discharge port.
The right end of the discharging assembly is connected to the support frame through a spring, the discharging assembly is connected with a vibrating motor which drives the discharging assembly to vibrate up and down, and the vibrating motor is fixed to the support frame.
The sand discharging groove is formed in the side wall of the tank body, the sand discharging groove is a plurality of long strips extending up and down, the circular blocking plate is arranged below the central water outlet pipe, the supporting pedestal is arranged below the blocking plate, an annular sand discharging cavity is reserved between the blocking plate and the inner side wall of the tank body, the sand discharging cavity is vertically communicated with the sand discharging groove, and a sand discharging opening is formed in the bottom of the sand discharging cavity.
The front side wall and the rear side wall of the material conveying groove at the position of the filter plate are inwards contracted into a circular arc shape.
An electric heating wire is embedded in the sand discharge groove.
The invention has the beneficial effects that: can separate out the inorganic matter in the kitchen garbage through mechanical equipment in succession, save the manual work, greatly reduced the cost of labor, need not shut down in the disengaging process moreover, separation efficiency is high, and separation effect is good, has avoided inorganic matters such as beverage bottle to get into equipment, influences whole equipment performance. And the continuous work of filtering, impurity removal, crushing and pulp homogenizing is realized, the equipment integration level is high, the investment cost is reduced, and the occupied space is saved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a schematic structural view of the kick-out assembly and the shaft portion of the present invention.
Fig. 4 is a schematic structural view of the material poking assembly, the discharging assembly and the rotating shaft part.
Fig. 5 is a schematic cross-sectional view of a homogenizing device according to the invention.
Wherein: the automatic sand discharging device comprises a support frame, 2 feed inlets, 3 screw conveyors, 4 material conveying grooves, 5 filter plates, 6 oil storage water tanks, 7 transfer trolleys, 8 stirring rods, 9 rotating shafts, 10 discharging rods, 11 vibrating motors, 12 storage boxes, 13 tank bodies, 14 material inlets, 15 central water outlet pipes, 16 stirring vertical rods, 17 rotational viscometer, 18 slurry outlets, 19 sand discharging ports, 20 sand discharging cavities, 21 support pedestal, 22 plugging plates, 23 stirring blades, 24 sand discharging grooves, 25 stirring motors, 26 crushers, 27 electric heating wires and 28 stirring cross rods.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, 2, 3, 4 and 5, a continuous impurity removal treatment system for kitchen waste comprises a support frame 1, wherein a material conveying groove 4 transversely extending left and right is arranged at the top of the support frame 1, a feed inlet 2 is arranged at the top of the left side of the material conveying groove 4, a screw conveyor 3 is arranged at the left end of the material conveying groove 4, a rotating shaft 9 is longitudinally erected at the right side of the material conveying groove 4, an oil storage water tank 6 is arranged below the material conveying groove 4 between the rotating shaft 9 and the screw conveyor 3, a filter plate 5 with filter holes is arranged between the bottom of the material conveying groove 4 and the top of the oil storage water tank 6, a driving motor in driving connection with the rotating shaft 9 is arranged on the support frame 1, a plurality of groups of material stirring components radially extend on the circumferential surface of the rotating shaft 9, each group of material stirring components comprises a plurality of material stirring rods 8 side by side along the axial direction of the rotating shaft 9, each material stirring, set 8 terminal bottom lower surface place curved surfaces of pole and material conveyer trough 4 in the plane of bottom upper surface place tangent, leave between two adjacent set pole 8 and leak the material space, 9 right sides in the pivot are provided with the subassembly of unloading that a set of high-low slope in the left and right sides set up, the subassembly of unloading includes a plurality of along 9 axial discharge poles 10 side by side in the pivot, pivot 9 surfaces are pressed close to the discharge pole 10 left end, and discharge pole 10 right-hand member extends to material conveyer trough 4 outer and below and has accepted and deposit case 12, and discharge pole 10 passes from leaking the material space when the material subassembly is rotated to the drive of pivot 9, 4 bottoms in the material conveyer trough on pivot 9 right side are provided with the discharge gate, the discharge gate has the material import 14 of rubbing crusher 26 through the tube coupling, the material export of rubbing crusher 26 has homogenate device through the tube coupling.
The homogenizing device comprises a tank body 13, wherein a stirring motor 25 is arranged at the center of the top of the tank body 13, the stirring motor 25 is in driving connection with a central water outlet pipe 15 vertically extending to the position of a central shaft in the tank body 13, the two sides of the upper part of the central water outlet pipe 15 are symmetrically connected with cross rods, the tail ends of the cross rods are connected with stirring vertical rods 16, the inner sides of the stirring vertical rods 16 are transversely provided with a plurality of rotating cross shafts, the rotating cross shafts are rotatably connected with stirring blades 23, the top of the tank body 13 is provided with a slurry inlet, the pipe wall of the central water outlet pipe 15 is provided with a plurality of water outlet holes, the bottom of the central water outlet pipe 15 is provided with a rotary viscometer 17, the lower part of the tank body 13 is provided with a slurry outlet 18, a recovery water pipe is connected between the bottom of the oil storage water, and a transfer trolley 7 is connected below the sewage draining outlet and the oil draining outlet. The right end of the discharging assembly is connected to the support frame 1 through a spring, the discharging assembly is connected with a vibrating motor 11 which drives the discharging assembly to vibrate up and down, and the vibrating motor 11 is fixed to the support frame 1.
Be provided with the sand discharge recess 24 of the rectangular shape of a plurality of upper and lower extensions on the lateral wall of jar body 13, central outlet pipe 15 below is provided with circular shape shutoff board 22, shutoff board 22 below is provided with support pedestal 21, leave annular sand discharge cavity 20 between shutoff board 22 and the jar body 13 inside wall, sand discharge cavity 20 link up from top to bottom with sand discharge recess 24, and sand discharge cavity 20 bottom is provided with sand discharge port 19. The front and rear side walls of the material conveying groove 4 at the position of the filter plate 5 are inwards contracted into circular arc shapes. An electric heating wire 27 is embedded in the sand discharge groove 24.
The working principle is as follows: kitchen garbage gets into material conveyer trough 4 from feed inlet 2, screw conveyer 3 promotes kitchen garbage and removes from a left side to the right side from material conveyer trough 4, when removing filter 5, the oil storage water tank 6 of filtration pore inflow below on filter 5 is followed to oil and water in the kitchen garbage, in order to avoid long-time use to cause the jam of filtration pore, because material conveyer trough 4 is convex in the inside shrink of the front and back lateral wall in filter 5 department, thereby improve kitchen garbage's velocity of flow and extrude kitchen garbage simultaneously, make kitchen garbage oil and water filter away from filtering the pore. The kitchen waste after being filtered continuously moves rightwards, the rotating shaft 9 rotates and drives the material stirring rod 8 to turn clockwise, the material stirring rod 8 drags out inorganic matters in the kitchen waste and continuously turns rightwards, the material stirring rod 8 continuously rotates clockwise until the material stirring rod 8 and the discharging rod 10 are staggered, the discharging rod 10 penetrates through a material leakage gap between the material stirring rods 8, and therefore the inorganic matters on the material stirring rod 8 are reserved on the discharging rod 10. After the kitchen garbage gets into homogenate device's jar 13 internal, agitator motor 25 drives stirring horizontal pole 28 and 16 stirring kitchen garbage of stirring montant, stirring vane 23's rotation has also improved stirring effect simultaneously, rotational viscometer 17 real-time detection kitchen garbage's solid content rate, if it is higher to contain the solid content rate, then from central outlet pipe 15 injected water, water flows out and mixes with kitchen garbage from central outlet pipe 15's apopore, under stirring vane 23, make water and kitchen garbage intensive mixing, thereby reduce and contain the solid content rate. In the process of stirring by the stirring blade 23, due to the centrifugal effect, the sand with heavier weight is thrown onto the inner wall of the tank body 13, the sand discharge groove 24 on the inner wall of the tank body 13 limits the sand thrown into the sand discharge groove 24, so that the sand is limited in the sand discharge groove 24 and cannot continue to rotate along the inner wall, when the stirring blade 23 stops rotating, under the action of gravity, the sand falls into the sand discharge cavity 20 at the bottom of the tank body 13 along the sand discharge groove 24, then is discharged from the sand discharge port 19, and the slurry is discharged from the slurry outlet 18. The electric heating wire 27 can heat the kitchen waste in the tank 13 at a constant temperature, so that the kitchen waste can be kept at an optimal temperature. Thus, the two steps of homogenizing and discharging sand are completed in the tank 13.
The foregoing is only a preferred embodiment of this patent, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of this patent, and these modifications and substitutions should also be regarded as the protection scope of this patent.
Claims (6)
1. The utility model provides a kitchen garbage removes impurity processing system in succession which characterized in that: the material stirring device comprises a support frame, wherein a material conveying groove transversely extending leftwards and rightwards is arranged at the top of the support frame, a feed inlet is formed in the top of the left side of the material conveying groove, a screw conveyor is arranged at the end part of the left side of the material conveying groove, a rotating shaft is longitudinally erected on the right side of the material conveying groove, an oil storage water tank is arranged below the material conveying groove between the rotating shaft and the screw conveyor, a filter plate with filter holes is arranged between the bottom of the material conveying groove and the top of the oil storage water tank, a driving motor in driving connection with the rotating shaft is arranged on the support frame, a plurality of groups of material stirring assemblies radially extend on the circumferential surface of the rotating shaft, each group of material stirring assemblies comprises a plurality of material stirring rods which are arranged side by side along the axial direction of the rotating shaft, each material stirring rod is an arc with the tail end bent, leave between two adjacent kickoff poles and leak the material space, the pivot right side is provided with the subassembly of unloading that a set of high low slope in the right side set up, the subassembly of unloading includes a plurality of discharge arm side by side along the pivot axial, the pivot surface is pressed close to the discharge arm left end, and the discharge arm right-hand member extends to the material conveyer trough outer and the below has been accepted and has been deposited the case, and the discharge arm passes from leaking the material space when the pivot drives the kickoff subassembly rotation, the material conveyer trough bottom on pivot right side is provided with the discharge gate, the discharge gate has the material import of rubbing crusher through the tube coupling, there is the homogenate device rubbing crusher's material export through the tube coupling.
2. The continuous impurity removal treatment system for the kitchen waste, according to claim 1, is characterized in that: the homogenizing device comprises a tank body, a stirring motor is arranged at the center of the top of the tank body, the stirring motor is in driving connection with a central water outlet pipe vertically extending to the position of a central shaft in the tank body, the two sides of the upper part of the central water outlet pipe are symmetrically connected with cross rods, the tail ends of the cross rods are connected with vertical stirring rods, a plurality of rotating transverse shafts are transversely arranged on the inner sides of the vertical stirring rods, stirring blades are rotatably connected onto the rotating transverse shafts, a slurry inlet is formed in the top of the tank body, a plurality of water outlet holes are formed in the pipe wall of the central water outlet pipe, a rotary viscometer is arranged at the bottom of the central water outlet pipe, a slurry outlet is formed in the lower portion of the tank body, a recovery water pipe is connected between the bottom of the oil storage water tank and the slurry inlet of the tank body, the recycling water pipe is provided with a water pump, the upper part of the oil storage water tank is provided with an oil discharge port, the bottom of the oil storage water tank is provided with a drain outlet, and a transfer trolley is connected below the drain outlet and the oil discharge port.
3. The continuous impurity removal treatment system for the kitchen waste, according to claim 1, is characterized in that: the right end of the discharging assembly is connected to the support frame through a spring, the discharging assembly is connected with a vibrating motor which drives the discharging assembly to vibrate up and down, and the vibrating motor is fixed to the support frame.
4. The continuous impurity removal treatment system for the kitchen waste, according to claim 1, is characterized in that: the sand discharging device is characterized in that a plurality of long-strip-shaped sand discharging grooves extending up and down are formed in the side wall of the tank body, a circular blocking plate is arranged below the central water outlet pipe, a supporting pedestal is arranged below the blocking plate, an annular sand discharging cavity is reserved between the blocking plate and the inner side wall of the tank body, the sand discharging cavity is vertically communicated with the sand discharging grooves, and a sand discharging opening is formed in the bottom of the sand discharging cavity.
5. The continuous impurity removal treatment system for the kitchen waste, according to claim 1, is characterized in that: the front side wall and the rear side wall of the material conveying groove at the position of the filter plate are inwards contracted into an arc shape.
6. The continuous impurity removal treatment system for the kitchen waste, according to claim 4, is characterized in that: an electric heating wire is embedded in the sand discharge groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098984.0A CN110681679A (en) | 2019-11-12 | 2019-11-12 | Continuous impurity removal treatment system for kitchen waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098984.0A CN110681679A (en) | 2019-11-12 | 2019-11-12 | Continuous impurity removal treatment system for kitchen waste |
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| Publication Number | Publication Date |
|---|---|
| CN110681679A true CN110681679A (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911098984.0A Pending CN110681679A (en) | 2019-11-12 | 2019-11-12 | Continuous impurity removal treatment system for kitchen waste |
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| Country | Link |
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| CN (1) | CN110681679A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547233A (en) * | 2021-08-05 | 2021-10-26 | 安徽屹翔滤材有限公司 | Industrial filter cloth laser cutting machine and determination method |
| CN114960804A (en) * | 2022-05-25 | 2022-08-30 | 杭州国泰环保科技股份有限公司 | River silt dredging device for water environment protection |
-
2019
- 2019-11-12 CN CN201911098984.0A patent/CN110681679A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113547233A (en) * | 2021-08-05 | 2021-10-26 | 安徽屹翔滤材有限公司 | Industrial filter cloth laser cutting machine and determination method |
| CN114960804A (en) * | 2022-05-25 | 2022-08-30 | 杭州国泰环保科技股份有限公司 | River silt dredging device for water environment protection |
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Application publication date: 20200114 |