CN115094869B - Drainage plate capable of flocculating suspended particles rapidly and manufacturing equipment and process method thereof - Google Patents
Drainage plate capable of flocculating suspended particles rapidly and manufacturing equipment and process method thereof Download PDFInfo
- Publication number
- CN115094869B CN115094869B CN202210813311.4A CN202210813311A CN115094869B CN 115094869 B CN115094869 B CN 115094869B CN 202210813311 A CN202210813311 A CN 202210813311A CN 115094869 B CN115094869 B CN 115094869B
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- China
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- press roller
- transfer press
- drain board
- alum solution
- alum
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002245 particle Substances 0.000 title claims abstract description 14
- 230000003311 flocculating effect Effects 0.000 title claims abstract description 9
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 49
- 230000008595 infiltration Effects 0.000 claims abstract description 19
- 238000001764 infiltration Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 238000005253 cladding Methods 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 8
- 239000013078 crystal Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 229940037003 alum Drugs 0.000 claims description 98
- 239000000243 solution Substances 0.000 claims description 83
- 239000007921 spray Substances 0.000 claims description 71
- 238000002791 soaking Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- 239000012047 saturated solution Substances 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract 1
- 239000011259 mixed solution Substances 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Inorganic Chemistry (AREA)
- Coating Apparatus (AREA)
Abstract
The invention relates to a drain board for quickly flocculating suspended particles, and a manufacturing device and a process method thereof. A drain board for quickly flocculating suspended particles is characterized in that flocculating agent crystal grains are inlaid between non-woven fabric fibers of a filter membrane or are adhered to the surfaces of the non-woven fabric fibers; the equipment for manufacturing the drain board is characterized in that flocculating agent solution infiltration equipment is arranged between drain board cladding equipment and traction winding equipment; the method for manufacturing the drain board by adopting the equipment comprises the following steps of: 1, uniformly mixing, transferring the mixture to a non-woven fabric of a drain board through flocculating agent solution infiltration equipment, and embedding the flocculating agent crystallized particles between non-woven fabric fibers or adhering the flocculating agent crystallized particles to the surfaces of the non-woven fabric fibers. The invention has the characteristics of scientific and reasonable design, convenient use and good water purifying effect.
Description
Technical Field
The invention relates to a large-aperture drain board capable of flocculating suspended particles rapidly, a manufacturing machine and a manufacturing method of the drain board.
Background
The plastic drainage plate consists of a plastic core plate and non-woven fabrics wrapped outside the plastic core plate. The plastic core plate is provided with a drainage channel, and the non-woven fabric forms a permeable filter membrane through meshes among the chemical fibers. The plastic drainage plate is inserted into a saturated viscous soft foundation such as silt, silt soil, filling soil and the like, and under the action of the pre-pressing load on the upper part, the void water in the soft foundation is discharged through a non-woven fabric filter membrane layer and a drainage channel formed on the plastic core plate, so that the purpose of accelerating the consolidation of the soft foundation is realized. At present, although the common plastic drain board on the market has a certain water permeability effect, the water permeability effect is poor, the reason is that the water permeability meshes among the non-woven fabrics are small, and the water permeability meshes are very easy to be blocked by fine particles in the silt, so that a large amount of water in the soft foundation cannot directly penetrate through the water permeability meshes to enter the drain channel of the core board, but slowly penetrate into the drain channel, the drain efficiency is lower, and the soft foundation treatment engineering period is greatly prolonged.
Disclosure of Invention
Aiming at the technical defect of water permeability of the existing plastic drain plate, the invention provides a drain plate capable of flocculating suspended particles rapidly, and a manufacturing device and a process method thereof.
The technical scheme of the invention is as follows: the utility model provides a drain bar of quick flocculation suspended particles, it includes filter membrane and core, the filter membrane cladding the core, the filter membrane is the non-woven fabrics, is equipped with alum grain on the filter membrane, alum grain inlays between the non-woven fabrics fibre or adheres to the fibre surface of non-woven fabrics.
The equipment for manufacturing the drain board comprises cladding equipment and traction winding equipment, wherein the non-woven fabric is clad on a core board by the cladding equipment, and the drainage board is straightened and wound by the traction winding equipment, and the drain board is characterized in that: an alum solution infiltration device is arranged between the cladding device and the traction winding device and used for infiltrating the alum solution onto the non-woven fabric;
In an exemplary mode, the infiltration equipment adopts a roller type, and comprises a transfer press roller, a spray header and an alum solution tank, wherein the transfer press roller comprises an upper transfer press roller and a lower transfer press roller, the upper transfer press roller and the lower transfer press roller clamp the drain board, and the drain board drives the upper transfer press roller and the lower transfer press roller to rotate in opposite directions; the spray header is arranged above the upper transfer press roller, the alum solution tank is arranged below the lower transfer press roller, and the lower part of the lower transfer press roller is immersed in the alum solution.
Further, the outer edges of the upper transfer press roll and the lower transfer press roll are provided with solvent adsorption layers.
In the exemplary mode, the infiltration equipment adopts a spray type, and comprises a spray pipe and a spray head, wherein the spray pipe is divided into an upper spray pipe and a lower spray pipe, control valves are respectively arranged on the upper spray pipe and the lower spray pipe and respectively control the flow of alum solution in the upper spray pipe and the lower spray pipe, and the spray head comprises an upper spray head and a lower spray head which are respectively communicated with the upper spray pipe and the lower spray pipe and respectively supply alum solution to the upper spray head and the lower spray head.
In an exemplary mode, the soaking device adopts a soaking type, and comprises a soaking tank, a lower supporting rotating shaft and an upper supporting rotating shaft, wherein an alum solution is arranged in the soaking tank, the lower part of the lower supporting shaft is soaked in the alum solution in the soaking tank, and the drain board is sequentially wound on the lower supporting rotating shaft and the upper supporting rotating shaft.
The method for manufacturing the drain board by adopting the equipment comprises the following steps:
step 1, manufacturing a plastic drain board by using drain board cladding equipment;
Step 2, putting a proper amount of alum particles into proper amount of water for dissolution until all alum particles are dissolved to prepare alum solution with a certain concentration;
and 3, mixing the alum solution obtained in the step 2 with a demulsification water-removing agent according to a weight ratio of 10:1, uniformly mixing;
Step 4, uniformly infiltrating the solution obtained in the step 3 on the non-woven fabric through infiltration equipment;
And 5, evaporating water from the non-woven fabric soaked in the alum solution in the step 4 in a natural environment, and embedding the precipitated alum crystal grains in non-woven fabric fibers.
Optionally, the infiltrating device in the step 4 adopts a roller type, a spray head is arranged above an upper transfer press roller, the upper transfer press roller is continuously used for spraying alum solution, an alum solution tank is arranged below a lower transfer press roller, and the lower part of the lower transfer press roller is immersed in the alum solution; the alum solution transferring process comprises the following steps: the upper transfer press roller and the lower transfer press roller clamp the drain board, the drain board drives the upper transfer press roller and the lower transfer press roller to rotate in opposite directions, the upper transfer press roller transfers the alum solution onto the non-woven fabric above the drain board, and the lower transfer press roller transfers the alum solution onto the non-woven fabric below the drain board.
Optionally, in the step 4, the infiltration apparatus adopts a spray type, the spray pipe supplies alum solution to an upper spray head and a lower spray head respectively, the upper spray head sprays alum solution to the non-woven fabric above the drain board, and the lower spray head sprays alum solution to the non-woven fabric below the drain board.
Optionally, the soaking device in step 4 is a soaking device, the drain board is wound on the lower supporting rotating shaft and the upper supporting rotating shaft in sequence, the lower part of the lower supporting shaft is soaked in alum solution in the soaking tank, the non-woven fabric is soaked in the alum solution when the drain board passes through the lower supporting rotating shaft, and the remaining alum solution seeps out in the running process of the lower supporting rotating shaft and the upper supporting rotating shaft.
Preferably, the concentration of the alum solution in step2 is a saturated solution.
According to the invention, the flocculant crystal grains are arranged in the non-woven fabric filter membrane holes of the existing drain board, so that the surrounding water of the plastic drain board after being inserted into the silt is flocculated and precipitated. In order to manufacture the drain board, the alum solution infiltration equipment is arranged between the drain board coating equipment and the traction winding equipment, a specific process is arranged, and the alum solution is transferred onto the non-woven fabric coated with the drain board by adopting the equipment, so that the drain board capable of flocculating suspended particles rapidly is manufactured.
The invention has the characteristics of novel product design, simple equipment structure, reasonable process method and good water draining and permeating effect.
Drawings
FIG. 1 is a front view of a drain board;
FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 3 is an enlarged view of the structure of the portion I in FIG. 2;
FIG. 4 is a schematic diagram of a main sectional structure of a drum-type infiltration apparatus;
FIG. 5 is a schematic view of the cross-sectional structure B-B of FIG. 4;
FIG. 6 is a schematic diagram of a soaking type infiltration apparatus;
FIG. 7 is a schematic diagram of a spray infiltration apparatus.
In fig. 1-7: the non-woven fabric fiber is a non-woven fabric fiber, the alum grain is b, the plastic core plate is c, 1 is an upper transfer press roller, 2 is a lower transfer press roller, 3 is an alum solution tank, 4 is an alum solution pipe, 401 is an alum solution upper spray nozzle, 401 'is an alum solution lower spray nozzle, 5 is a drain plate, 6 is a front carrier roller, 7 is a rear traction press roller, 8 is a lower support rotating shaft, 9 is an upper support rotating shaft, 10 is a control valve, 11 is an upper spray pipe, 11' is a lower spray pipe, and 12 is a liquid collecting tank.
Detailed Description
The drainage plate with the fast flocculating suspended particles is shown in the accompanying drawings of figures 1, 2 and 3, the figure 1 shows the figure 1 that alum grains b are inlaid among non-woven fabric fibers a to form a novel functional non-woven fabric, and the figure 2 shows the figure 1 that the non-woven fabric with the novel function is coated on a section A-A of a plastic core plate c.
Three types of apparatus for making the drain board are shown in fig. 4, 5, 6 and 7.
As shown in fig. 4 and 5, after being manufactured by coating equipment, a drain board 5 passes through a space between an upper transfer press roller 1 and a lower transfer press roller 2 by a front carrier roller 6, the drain board 5 is clamped by the upper transfer press roller 1 and the lower transfer press roller 2, the drain board 5 is pulled by a rear traction press roller 7, the drain board 5 drives the upper transfer press roller 1 and the lower transfer press roller 2 to rotate in opposite directions, an alum solution pipe 4 supplies flocculant to an alum solution upper spray head 401, the alum solution upper spray head 401 is arranged above the upper transfer press roller 1, alum solution is sprayed by the upper transfer press roller 1 continuously, and the alum solution is transferred onto non-woven fabrics on the drain board 5 by the upper transfer press roller 1; the lower part of the lower transfer press roll 2 is immersed in the alum solution tank 3, and the lower transfer press roll 2 rotates to transfer the alum solution to the non-woven fabric below the drain board 5, thus completing flocculant transfer.
In order to enhance the storage capacity of the upper transfer press roll 1 and the lower transfer press roll 2 for the flocculation agent, the outer surface of the upper transfer press roll is usually provided with a solvent adsorption layer such as a sponge body.
FIG. 6 shows an example of an immersion apparatus. After being manufactured by the coating equipment, the drain plate 5 is pulled by the traction press roller 7, respectively passes through the front carrier roller 6, the lower support rotating shaft 8 and the upper support rotating shaft 9, the lower support rotating shaft 8 is immersed in the flocculating agent in the alum solution tank 3, the drain plate 5 moves upwards after being soaked in the flocculating agent by the lower support rotating shaft 8, the flocculating agent surplus in the drain plate 5 flows back to the alum solution tank 3, and the drain plate 5 enters the lower channel equipment by the upper support rotating shaft 9.
FIG. 7 shows an embodiment of a spray infiltration apparatus. After being manufactured by the coating equipment, the drain plate 5 is pulled by the traction press roller 7, and an alum solution upper spray head 401 and an alum solution lower spray head 401' are respectively arranged above and below the running drain plate 5, and are respectively used for spraying proper alum solution on non-woven fabrics on the upper surface and the lower surface of the drain plate 5. The spray pipe 11 is communicated with the alum solution upper spray head 401 and continuously supplies alum solution thereto; the lower spray pipe 11 'communicates with the alum solution lower spray head 401' and continuously supplies alum solution thereto. The control valve 10 controls the flow rate of the alum solution entering the upper spray pipe 11 and the lower spray pipe 11', and the surplus alum solution sprayed from the alum solution upper spray head 401 and the alum solution lower spray head 401' flows into the liquid collecting tank 12 for recycling.
Embodiments of a method for manufacturing a drain board using a roller-type wetting slide apparatus.
A. and manufacturing the drain board by using cladding equipment.
B. Dissolving appropriate amount of Alum granule in appropriate amount of water, stirring until all Alum granule is dissolved to obtain Alum solution with certain concentration, adding one tenth of polymeric ferric chloride solution into Alum solution, and mixing to obtain Alum mixed solution.
C. The upper transfer press roller 1 and the lower transfer press roller 2 clamp the drain board 5, the drain board 5 drives the upper transfer press roller 1 and the lower transfer press roller 2 to rotate in opposite directions, the alum solution upper spray head 401 continuously upwards transfers the press roller 1 to spray the alum mixed solution, the upper transfer press roller 1 transfers the alum mixed solution onto the non-woven fabric of R above the drain board, and the lower transfer press roller 2 transfers the alum mixed solution from the alum solution tank 3 onto the non-woven fabric below the drain board 5.
D. Evaporating water from the drain board infiltrated by the alum mixed solution in a natural environment, and embedding crystal grains precipitated by the alum mixed solution in the non-woven fabric fibers or attaching the crystal grains to the surfaces of the non-woven fabric fibers.
Claims (10)
1. The manufacturing method of the drain board capable of flocculating suspended particles rapidly comprises a filter membrane and a core plate, wherein the filter membrane is used for coating the core plate, and the filter membrane is non-woven fabric, and is characterized in that: the filter membrane is provided with alum grains which are inlaid between non-woven fabrics or attached to the surface of the non-woven fabrics, and the manufacturing method comprises the following steps:
step 1, manufacturing a plastic drain board by using drain board cladding equipment;
Step2, putting alum grains into water for dissolution until all alum grains are dissolved to prepare an alum solution;
And 3, the weight ratio of the alum solution to the polymeric ferric chloride solution obtained in the step 2 is 10:1, uniformly mixing;
Step 4, uniformly infiltrating the solution obtained in the step 3 on the non-woven fabric through infiltration equipment;
And 5, evaporating water from the non-woven fabric soaked in the alum solution in the step 4 in a natural environment, and embedding the precipitated alum crystal grains in non-woven fabric fibers.
2. The method for manufacturing the drain board according to claim 1, wherein: in the step 4, the infiltration equipment adopts a roller type, a spray head is arranged above an upper transfer press roller, the upper transfer press roller continuously sprays alum solution, an alum solution tank is arranged below a lower transfer press roller, the lower part of the lower transfer press roller is immersed in the alum solution, and the alum solution transfer process comprises the following steps: the upper transfer press roller and the lower transfer press roller clamp the drain board, the drain board drives the upper transfer press roller and the lower transfer press roller to rotate in opposite directions, the upper transfer press roller transfers the alum solution onto the non-woven fabric above the drain board, and the lower transfer press roller transfers the alum solution onto the non-woven fabric below the drain board.
3. The method for manufacturing the drain board according to claim 1, wherein: in the step 4, the infiltration equipment adopts spray type, spray pipes respectively supply alum solution to an upper spray head and a lower spray head, the upper spray head sprays alum solution to non-woven fabrics above the drain board, and the lower spray head sprays alum solution to non-woven fabrics below the drain board.
4. The method for manufacturing the drain board according to claim 1, wherein: in the step 4, the soaking equipment is adopted, the drain board is sequentially wound on the lower supporting rotating shaft and the upper supporting rotating shaft, the lower part of the lower supporting rotating shaft is soaked in alum solution in the soaking tank, non-woven fabrics are soaked in the alum solution when the drain board passes through the lower supporting rotating shaft, and in the running process of the lower supporting rotating shaft and the upper supporting rotating shaft, the surplus alum solution seeps out.
5. The method for manufacturing the drain board according to claim 1, wherein: the concentration of the alum solution in the step 2 is saturated solution.
6. An apparatus for manufacturing a drain board according to claim 1, comprising a wrapping apparatus for wrapping a nonwoven fabric on a core board, and a traction winding apparatus for straightening and winding the drain board, wherein: an alum solution infiltration device is arranged between the wrapping device and the traction winding device and used for infiltrating the alum solution onto the non-woven fabric.
7. The apparatus as claimed in claim 6, wherein: the infiltration equipment adopts a roller type, and comprises a transfer press roller, a spray header and an alum solution tank, wherein the transfer press roller comprises an upper transfer press roller and a lower transfer press roller, the upper transfer press roller and the lower transfer press roller clamp the drain board, and the drain board drives the upper transfer press roller and the lower transfer press roller to rotate in opposite directions; the spray header is arranged above the upper transfer press roller, the alum solution tank is arranged below the lower transfer press roller, and the lower part of the lower transfer press roller is immersed in the alum solution.
8. The apparatus of claim 7, wherein: the outer edges of the upper transfer press roller and the lower transfer press roller are provided with solvent adsorption layers.
9. The apparatus as claimed in claim 6, wherein: the infiltration equipment adopts spray type, including spray tube and shower nozzle, the spray tube divide into spray tube and lower spray tube, set up the control valve respectively on last spray tube and the lower spray tube, alum solution flow in control respectively last spray tube and the lower spray tube, the shower nozzle includes shower nozzle, lower shower nozzle, respectively with go up spray tube and lower spray tube are linked together.
10. The apparatus as claimed in claim 6, wherein: the infiltration equipment adopts the soak formula, including soaking tank, lower support pivot and last support pivot, be equipped with alum solution in the soaking tank, the lower part of lower support pivot is immersed in the alum solution in the soaking tank, the drain bar winds in proper order in lower support pivot and last support pivot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210813311.4A CN115094869B (en) | 2022-07-12 | 2022-07-12 | Drainage plate capable of flocculating suspended particles rapidly and manufacturing equipment and process method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210813311.4A CN115094869B (en) | 2022-07-12 | 2022-07-12 | Drainage plate capable of flocculating suspended particles rapidly and manufacturing equipment and process method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115094869A CN115094869A (en) | 2022-09-23 |
| CN115094869B true CN115094869B (en) | 2024-06-18 |
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| CN202210813311.4A Active CN115094869B (en) | 2022-07-12 | 2022-07-12 | Drainage plate capable of flocculating suspended particles rapidly and manufacturing equipment and process method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267561A (en) * | 2018-08-16 | 2019-01-25 | 温州大学 | The system and method for composite flocculation agent combined vacuum precompressed processing reclaimed ground |
| CN214234707U (en) * | 2021-01-04 | 2021-09-21 | 成都特瓦新材料有限公司 | Drain bar auxiliary agent sprays subassembly and drain bar processing equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106582325B (en) * | 2017-03-03 | 2019-01-29 | 河北工业大学 | A kind of preparation method of very hydrophobic polyvinylidene fluoride microporous film |
| CN109208575B (en) * | 2018-09-30 | 2024-04-19 | 华中科技大学 | Method for reinforcing high-water-content blow-filled soft soil by combining medicament and horizontal vacuum |
| CN111660638B (en) * | 2020-05-25 | 2022-08-02 | 佛山小代装饰材料有限公司 | PVC film printing machine |
| CN112144501B (en) * | 2020-09-03 | 2022-05-03 | 温州大学 | Plastic drainage plate for preventing micro soil particles from being blocked and construction method thereof |
| CN113789776A (en) * | 2021-10-28 | 2021-12-14 | 中船勘察设计研究院有限公司 | Composite type drain board for preventing back flushing gas from clogging |
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- 2022-07-12 CN CN202210813311.4A patent/CN115094869B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267561A (en) * | 2018-08-16 | 2019-01-25 | 温州大学 | The system and method for composite flocculation agent combined vacuum precompressed processing reclaimed ground |
| CN214234707U (en) * | 2021-01-04 | 2021-09-21 | 成都特瓦新材料有限公司 | Drain bar auxiliary agent sprays subassembly and drain bar processing equipment |
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| CN115094869A (en) | 2022-09-23 |
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