A suspended filler with self-cleaning function

Abstract

This invention discloses a self-cleaning suspended filler, comprising a sphere, which includes an upper hemisphere and a lower hemisphere, detachably connected. The sphere comprises the following raw materials in the indicated mass fractions: polyethylene 68.8%-69.8%, ethylene and vinyl acetate copolymer 19.0%-19.5%, calcium sulfate 5.0%-6.0%, calcium carbonate 2.0%-2.5%, diatomaceous earth 1.6%-2.0%, activated carbon 0.8%-1.2%, colorant 0.7%-0.8%, and antioxidant 0.1%-0.2%. The outer shell of the suspended filler in this invention is not merely a carrier, but can also serve as a microbial carrier itself. Furthermore, it easily detaches after reaching a certain thickness, without clogging the pores or affecting the function of the internal sponge-like filler as a microbial carrier.

Description

Technical Field

[0001] This invention relates to the field of packing materials, and more particularly to a suspension packing material with self-cleaning function. Background Technology

[0002] While the rapid development of modern industrial technology has brought immense convenience to people, it has also exacerbated environmental degradation. In response to the increasingly severe environmental problems, strengthening wastewater treatment and raising emission standards are imperative.

[0003] In the biological contact oxidation method for wastewater treatment, a variety of suspended packing materials have been developed for wastewater treatment. However, most of them are made of plastic injection molding, but their surfaces are smooth and only serve to load the internal spongy packing material. Microorganisms have difficulty attaching and forming films on them.

[0004] The Chinese patent document with patent number "CN205500896U" discloses a suspended packing material for wastewater treatment, in which the outer shell of the packing material only serves a load-bearing function. Summary of the Invention

[0005] The purpose of this invention is to provide a suspension packing material with a self-cleaning function.

[0006] The innovation of this invention lies in the fact that the outer shell of the suspended filler is not only a carrier, but can also serve as a microbial carrier. Moreover, it is easy to detach after reaching a certain thickness, without clogging the pores and affecting the function of the internal spongy filler as a microbial carrier.

[0007] To achieve the above-mentioned objectives, the technical solution of this invention is as follows:

[0008] A self-cleaning suspension filler includes spheres, each sphere comprising an upper hemisphere and a lower hemisphere, the upper and lower hemispheres being detachably connected. The spheres are characterized by comprising the following raw materials in the indicated mass fractions: polyethylene 68.8%-69.8%, ethylene and vinyl acetate copolymer 19.0%-19.5%, calcium sulfate 5.0%-6.0%, calcium carbonate 2.0%-2.5%, diatomaceous earth 1.6%-2.0%, activated carbon 0.8%-1.2%, colorant 0.7%-0.8%, and antioxidant 0.1%-0.2%.

[0009] Furthermore, the polyethylene is linear low-density polyethylene.

[0010] Furthermore, the vinyl acetate content in the ethylene and vinyl acetate copolymer is 5%-30%.

[0011] Furthermore, the activated carbon powder is composed of a mixture of wood-based activated carbon powder and coal-based activated carbon powder, with a weight ratio of wood-based activated carbon powder to coal-based activated carbon powder of 5 to 10:1.

[0012] Furthermore, the colorant is carbon black, iron oxide red, cyan iron blue, red iron blue, or iron oxide brown.

[0013] Furthermore, the antioxidant is at least one of butylated hydroxyanisole, butylated hydroxytoluene, and tert-butylhydroquinone.

[0014] Furthermore, a first fixing chuck is provided on the outer surface of the upper hemisphere, and a second fixing chuck is provided on the outer surface of the lower hemisphere. The first fixing chuck and the second fixing chuck are fixedly connected by hexagonal screws. A blade structure is fixedly connected to the upper surface of the first fixing chuck by screws. A bent portion is provided at the middle part of the blade structure. The upper surface of the blade structure is coated with a first smooth coating structure, and the lower surface of the blade structure is coated with a second smooth coating structure. The surface of the blade structure is provided with a streamlined curved surface structure.

[0015] Furthermore, the surface of the blade structure is provided with a first threaded slot, and the surfaces of the first fixing chuck and the second fixing chuck are provided with a second threaded slot.

[0016] Furthermore, the bending part is a flexible metal structure made of copper or aluminum that can be bent and deformed; the surfaces of the upper and lower hemispheres are provided with honeycomb groove structures, and microbial sponge block fillers are placed inside the upper and lower hemispheres.

[0017] Furthermore, the method for preparing the sphere includes the following steps:

[0018] (1) Take the materials according to the formula and mix them evenly to obtain the premix;

[0019] (2) Heat the premix to a molten state to obtain a molten material;

[0020] (3) Press the molten material into shape through a mold.

[0021] The beneficial effects of this invention are:

[0022] 1. The suspended filler shell in this invention is not only a carrier, but can also serve as a microbial carrier. Moreover, it is easy to detach after reaching a certain thickness, without clogging the pores or affecting the function of the internal spongy filler as a microbial carrier.

[0023] 2. In this invention, linear low-density polyethylene with a density of 0.918–0.935 g / cm³ is used. 3The main structural material is ethylene-vinyl acetate copolymer with a density of 0.935–0.947 g / cm³. 3 As an auxiliary framework material, the density of the suspension is controlled within the range of 0.96–0.97 g / cm³. 3 Its density is lower than that of water. During application, even after microorganisms adhere to the suspended packing material, its density remains less than that of water. Under the action of stirring or aeration, it can suspend in water, exhibiting excellent fluidity. Because linear low-density polyethylene is used as the main skeleton material, its surface tension is low. When microorganisms adhere to the suspended packing material to a certain thickness, they easily detach from the surface, giving the suspended packing material a self-cleaning function. Using ethylene-vinyl acetate copolymer as an auxiliary skeleton material not only imparts excellent bonding properties during processing, enhancing the mechanical strength of the self-cleaning biological packing material for durability, but also significantly increases the adhesion and hydrophilicity between the suspended packing materials.

[0024] 3. The inorganic chemicals added in this invention, including calcium sulfate, calcium carbonate, and diatomaceous earth, significantly increase the hydrophilicity of the suspended packing material, which is beneficial to the aggregation of microorganisms.

[0025] 4. The addition of antioxidants in this invention greatly improves the anti-aging and anti-oxidation properties of the suspended packing, and extends the service life of the self-cleaning suspended packing.

[0026] 5. The suspended packing material made by mixing the components and their synergistic effect in this invention enhances the hydrophilicity of the biological packing material. During use, the suspended packing material and sewage can be in close contact, and activated sludge can easily adhere to the surface of the suspended packing material, thus enhancing the effectiveness of the packing material.

[0027] 6. In this invention, by installing multiple blade structures on the outside of the suspended ball packing structure and by designing and protecting the blades in a multi-functional way, the suspended ball packing can rotate better during aeration, and can easily and quickly remove the biological layer on the internal sponge block, thus achieving the advantages of good degradation effect and high sewage purification efficiency.

[0028] 7. In this invention, a bending part is provided in the middle of the blade structure. The tilt angle of the blade can be adjusted by manually bending the bending part to optimize the blade rotation effect.

[0029] 8. In this invention, by providing a smooth coating structure on both outer surfaces of the blade structure, the friction between the blade structure and the water flow during rotation can be effectively reduced, thereby accelerating the rotation speed. Attached Figure Description

[0030] Figure 1 This is the overall front view of the present invention;

[0031] Figure 2This is a schematic diagram of the blade connection structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the external structure of the blade structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal components of the blade structure of the present invention;

[0034] Figure 5 This is a side view of the blade structure of the present invention. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0036] Example 1: A self-cleaning suspended packing material includes a sphere, comprising an upper hemisphere 2 and a lower hemisphere 6, which are detachably connected. Microbial sponge-like packing material is placed inside the upper and lower hemispheres 2 and 6. Both the upper and lower hemispheres 2 and 6 have honeycomb-like perforated structures 1 on their surfaces. A first fixing chuck 4 is provided on the outer surface of the upper hemisphere 2, and a second fixing chuck 5 is provided on the outer surface of the lower hemisphere 6. The first and second fixing chucks 4 are fixedly connected by hexagonal screws 3. A blade structure 7 is fixedly connected to the upper surface of the first fixing chuck 4 by screws. A bending portion 9 is provided in the middle of the blade structure 7. The bending portion 9 is a flexible, bendable metal structure made of copper or aluminum. The upper surface of the blade structure 7 is coated with a first smooth coating structure 10, and the lower surface of the blade structure 7 is coated with a second smooth coating structure 12. The surface of the blade structure 7 is provided with a streamlined curved surface structure 11. The surface of the blade structure 7 is provided with a first threaded slot 13, and the surfaces of the first fixed chuck 4 and the second fixed chuck 5 are provided with a second threaded slot 8. Multiple blade structures 7 are provided, and the installation position of the blade structure 7 is adjusted according to the position of the second threaded slot 8.

[0037] The spheres comprise the following raw materials by mass fraction: 68.8% polyethylene, 19.5% ethylene and vinyl acetate copolymer, 6.0% calcium sulfate, 2.5% calcium carbonate, 1.6% diatomaceous earth, 0.8% activated carbon, 0.7% colorant, and 0.1% antioxidant.

[0038] The polyethylene is linear low-density polyethylene.

[0039] The vinyl acetate content in the ethylene-vinyl acetate copolymer is 5%.

[0040] The activated carbon powder is composed of a mixture of wood-based activated carbon powder and coal-based activated carbon powder, with a weight ratio of 5:1.

[0041] The colorant is carbon black.

[0042] The antioxidant is butylated hydroxyanisole.

[0043] When making the spheres, the materials are taken according to the formula and mixed evenly to obtain a premix; the premix is ​​heated to a molten state to obtain a molten material; the molten material is pressed into shape through a mold.

[0044] Example 2: Referring to Example 1, the sphere comprises the following raw materials by mass fraction: 69.8% polyethylene, 19% ethylene and vinyl acetate copolymer, 5% calcium sulfate, 2% calcium carbonate, 2% diatomaceous earth, 1.2% activated carbon, 0.8% colorant, and 0.2% antioxidant.

[0045] The polyethylene is linear low-density polyethylene.

[0046] The vinyl acetate content in the ethylene-vinyl acetate copolymer is 10%.

[0047] The activated carbon powder is composed of a mixture of wood-based activated carbon powder and coal-based activated carbon powder, with a weight ratio of 8:1.

[0048] The colorant is iron oxide red.

[0049] The antioxidant is butylated hydroxytoluene.

[0050] Example 3: Referring to Example 1, the sphere comprises the following raw materials by mass fraction: 68.9% polyethylene, 19.42% ethylene and vinyl acetate copolymer, 5.2% calcium sulfate, 2.45% calcium carbonate, 1.95% diatomaceous earth, 1.18% activated carbon, 0.75% colorant, and 0.15% antioxidant.

[0051] The polyethylene is linear low-density polyethylene.

[0052] The vinyl acetate content in the ethylene-vinyl acetate copolymer is 30%.

[0053] The activated carbon powder is composed of a mixture of wood-based activated carbon powder and coal-based activated carbon powder, with a weight ratio of 10:1.

[0054] The colorant is bluish-green iron blue.

[0055] The antioxidant is tert-butylhydroquinone.

[0056] Example 4: Referring to Example 1, the colorant is iron oxide brown.

[0057] The antioxidant is at least one of butylated hydroxyanisole, butylated hydroxytoluene, and tert-butylhydroquinone.

[0058] The experimental results of treating domestic sewage using suspended fillers from Examples 1-3 and other fillers are compared in Table 1 below.

[0059] Table 1

[0060]

[0061] Table 1 shows that the COD removal rate and ammonia nitrogen removal rate of the packing material of the present invention are significantly higher than those of other packing materials.

[0062] Table 2 shows a comparison of the biodiversity indices of domestic sewage samples treated with suspended packing materials from Examples 1-3 and other packing materials.

[0063] Table 2

[0064] sample shannon chao PVC spherical filler 4.23 836.42 Polyurethane square packing 4.82 941.15 Example 1 Packing 4.96 994.27 Example 2 Packing 4.95 996.36 Example 3 Packing 4.97 995.68

[0065] The Chao index reflects community abundance; a higher value indicates higher species abundance. The Shannon index reflects community diversity; a higher value indicates higher diversity. The packing material of this invention has the highest Chao and Shannon indices, indicating that the biofilm attached to the packing material of this invention has the highest species diversity and abundance.

[0066] The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A self-cleaning suspended packing material, comprising a sphere, said sphere comprising an upper hemisphere and a lower hemisphere, said upper hemisphere and lower hemisphere being detachably connected, characterized in that, The sphere comprises the following raw materials by mass fraction: polyethylene 68.8%-69.8%, ethylene and vinyl acetate copolymer 19.0%-19.5%, calcium sulfate 5.0%-6.0%, calcium carbonate 2.0%-2.5%, diatomaceous earth 1.6%-2.0%, activated carbon 0.8%-1.2%, colorant 0.7%-0.8%, and antioxidant 0.1%-0.2%. A first fixing chuck is provided on the outer surface of the upper hemisphere, and a second fixing chuck is provided on the outer surface of the lower hemisphere. The first and second fixing chucks are fixedly connected by hexagonal screws. A blade structure is fixedly connected to the upper surface of the first fixing chuck by screws. A bend is provided in the middle of the blade structure. The upper surface of the blade structure is coated with a first smooth coating structure, and the lower surface of the blade structure is coated with a second smooth coating structure. The surface of the blade structure is provided with a streamlined curved surface structure.

2. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The polyethylene is linear low-density polyethylene.

3. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The vinyl acetate content in the ethylene and vinyl acetate copolymer is 5%-30%.

4. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The activated carbon is composed of a mixture of wood-based activated carbon powder and coal-based activated carbon powder, with a weight ratio of wood-based activated carbon powder to coal-based activated carbon powder of 5 to 10:

1.

5. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The colorant is carbon black, iron oxide red, cyan iron blue, red iron blue, or iron oxide brown.

6. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The antioxidant is at least one of butylated hydroxyanisole, butylated hydroxytoluene, and tert-butylhydroquinone.

7. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The surface of the blade structure is provided with a first threaded slot, and the surfaces of the first fixed chuck and the second fixed chuck are provided with a second threaded slot.

8. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The bending part is a flexible metal structure made of copper or aluminum that can be bent and deformed; the surfaces of the upper and lower hemispheres are provided with honeycomb groove structures, and the interiors of the upper and lower hemispheres are filled with microbial sponge block fillers.

9. The suspended packing material with self-cleaning function according to claim 1, characterized in that, The method for preparing the sphere includes the following steps: (1) Take the materials according to the formula and mix them evenly to obtain the premix; (2) Heat the premix to a molten state to obtain a molten material; (3) Press the molten material into shape through a mold.

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