Search

CN-121976516-A - Anti-clogging composite drainage net and preparation method thereof

CN121976516ACN 121976516 ACN121976516 ACN 121976516ACN-121976516-A

Abstract

The invention provides a composite drainage network for preventing clogging and a preparation method thereof, and relates to the technical field of drainage networks. The high-density fiber reinforced HDPE composite geotechnical cloth comprises a net core and geotechnical cloth fixedly arranged on two sides of the net core, wherein the net core sequentially comprises an inner core and an outer core from inside to outside, the inner core is made of glass fiber reinforced HDPE, the outer core is made of polyurea coating, and the geotechnical cloth is PP+ES geotechnical cloth. Solves the problems of poor compressive capacity, low water conductivity, low transverse stretching and poor acid and alkali resistance of geotextile.

Inventors

  • LI HONGZHEN
  • AN CHEN
  • LIU HUA
  • ZHAO HENGKAI
  • CHEN PEIHUA
  • ZHAO KUILI

Assignees

  • 浩阳环境股份有限公司

Dates

Publication Date
20260505
Application Date
20260128

Claims (10)

  1. 1. The anti-clogging composite drainage net comprises a net core and geotextiles fixedly arranged at two sides of the net core, and is characterized in that the net core sequentially comprises an inner core and an outer core from inside to outside, the inner core is glass fiber reinforced HDPE, and the outer core is a polyurea coating; the geotextile is PP+ES geotextile.
  2. 2. The anti-clogging composite drainage network of claim 1 wherein the polyurea coating is a polyaspartic acid ester polyurea.
  3. 3. The anti-clogging composite drainage network of claim 2, wherein the method of making the network core comprises the steps of: (1) Premixing dried HDPE, an antioxidant, an ultraviolet stabilizer and a compatilizer, adding dried chopped glass fibers, carrying out melt blending, and carrying out extrusion molding to obtain an inner core; Premixing polyaspartic acid ester resin, a silane coupling agent, an ultraviolet absorber, a light stabilizer and a solvent, finely grinding, and then adding a polysiloxane modifier and a defoaming agent to obtain a slurry A with certain viscosity; under inert gas, adding the HDI trimer into dehydrated butyl acetate for premixing, and then adding a stabilizer to obtain slurry B; (2) And (3) carrying out surface activation treatment on the inner core, spraying slurry A and slurry B on the surface of the inner core at the temperature of 45-55 ℃ to form a polyurea coating, and curing to obtain the net core.
  4. 4. The anti-clogging composite drainage network according to claim 3, wherein, in terms of mass fraction, in the inner core raw material, 65-85% of HDPE, 10-30% of chopped glass fiber, 1-4% of antioxidant, 1-3% of ultraviolet stabilizer and 2-5% of compatilizer; The volume ratio of the slurry A to the slurry B is 1:1.
  5. 5. The anti-clogging composite drainage network of claim 4 wherein the chopped glass fibers have a length of 3-6mm.
  6. 6. A composite anti-clogging drainage network according to claim 3, characterized in that the preparation method of the polysiloxane modifier comprises the following steps: Reacting hydroxyl-terminated polydimethylsiloxane with a solvent at 60-70 ℃, adding a catalyst, adjusting the pH value to 3.5-4.5, adding a mixed solution of 3-aminopropyl triethoxysilane and 3-mercaptopropyl trimethoxysilane, continuously carrying out heat preservation and stirring at the temperature of 60-70 ℃ for 1-2 hours after the dripping is finished, heating to 80-90 ℃, carrying out heat preservation for 3-5 hours, cooling to below 40 ℃, and carrying out aftertreatment to obtain the polysiloxane modified product.
  7. 7. A composite anti-clogging drainage network according to claim 3, characterized in that the molar ratio of 3-aminopropyl triethoxysilane to hydroxy-terminated polydimethylsiloxane is (0.8-1.2): 1; the molar ratio of 3-mercaptopropyl trimethoxysilane to 3-aminopropyl triethoxysilane is (0.05-0.2): 1.
  8. 8. The anti-clogging composite drainage network of claim 1 wherein the polyurea coating has a thickness of 150-250 μm.
  9. 9. The anti-clogging composite drainage network of claim 3, wherein the surface activation treatment comprises corona treatment with a power density of 2-4W/cm 2 and a treatment speed of 5-10m/min.
  10. 10. A method for preparing an anti-clogging composite drainage network according to any one of claims 1 to 9, wherein the anti-clogging composite drainage network is prepared by thermal compounding geotextiles and a network core.

Description

Anti-clogging composite drainage net and preparation method thereof Technical Field The invention relates to the technical field of drainage networks, in particular to an anti-clogging composite drainage network and a preparation method thereof. Background The traditional composite drainage network has the problems of blockage and failure commonly existing in complex environments (such as tailing ponds, red mud yards and dangerous waste landfills), the materials are easy to be corroded by acid and alkali, fine particles block pores and the maintenance cost is high, particularly in the scenes of fine powder slag landfill and red mud landfill, the water in slag or red mud is required to be rapidly led out for further landfill, and the traditional composite drainage network cannot be discharged due to the problem of blockage and water, so that the storage capacity cannot be released. Along with the improvement of environmental protection policy to high-efficient drainage and pollution prevention and control requirement, the market is urgent to have the compound drainage network of corrosion resistance, anti stifled structure concurrently to the challenge such as reply strong corrosiveness, industrial waste filtration liquid reduces full life cycle cost and ensures engineering safety. The existing composite drainage network for companies has the problems of poor pressure resistance of the network core, low water conductivity of the network core and the composite body, high density of main ribs of the network core, low transverse stretching of the network core and poor acid and alkali resistance of geotextiles, for example: 1) The thickness of the 6.0mm net core is reduced to 5.0mm after bearing 500kPa pressure, the thickness reduction rate reaches 16.7%, and the thickness reduction rate is less than or equal to 10% under the pressure of 830KPa required by American standard; 2) The water conductivity of the product below 6.0mm, the net core and the complex are lower than the urban construction standard requirement, the water conductivity of the product below 7.0mm can not reach the national standard 1000KPa water conductivity requirement, and the complex of 8.0mm can meet the water conductivity requirement of the American standard of 6.3 mm; 3) The construction technical specification of the CJJ113 landfill requires that the transverse tensile strength of the net core is more than or equal to 3KN/m, and the strength of the net core is 1-2KN/m at present. 4) The Europe and America standard and the national standard require that the geotextile of the composite drainage network has acid and alkali resistance, and the UV resistance is also more than 50 percent, and the acid and alkali resistance of the conventional composite geotextile is poor. Disclosure of Invention In order to solve the problems, the invention provides an anti-clogging composite drainage network, which solves the problems of poor compression resistance, low water conductivity, low transverse stretching and poor acid and alkali resistance of geotextile. The invention provides a composite drainage network for preventing clogging, which comprises a network core and geotextiles fixedly arranged at two sides of the network core, wherein the network core sequentially comprises an inner core and an outer core from inside to outside, the inner core is glass fiber reinforced High Density Polyethylene (HDPE), and the outer core is a polyurea coating; the geotextile is PP+ES hot air penetrating high-strength geotextile. The net core of the anti-clogging composite drainage net adopts the glass fiber reinforced HDPE inner core, the high modulus and the high rigidity of the net core directly resist high pressure, the collapse of the structure is prevented, the drainage channel under high pressure is prevented from being excessively compressed, the physical blockage caused by the embedding of geotextile into the channel is prevented, the longitudinal tensile strength and the transverse tensile strength can be simultaneously improved by adding glass fibers, and the PP+ES geotextile has excellent acid and alkali corrosion resistance. Alternatively, the polyurea coating is a polyaspartic acid ester polyurea. Optionally, the preparation method of the net core comprises the following steps: (1) Premixing dried HDPE, an antioxidant, an ultraviolet stabilizer and a compatilizer, adding dried chopped glass fibers, carrying out melt blending, granulating and extrusion molding to obtain an inner core; Premixing polyaspartic acid ester resin, a silane coupling agent, an ultraviolet absorber, a light stabilizer and a solvent, finely grinding, and then adding a polysiloxane modifier and a defoaming agent to obtain a slurry A with certain viscosity; under inert gas, adding the HDI trimer into dehydrated butyl acetate for premixing, and then adding a stabilizer to obtain slurry B; (2) And (3) carrying out surface activation treatment on the inner core, spraying slurry A and s