CN113817248A - Pipeline for sewage treatment and processing method thereof - Google Patents
Pipeline for sewage treatment and processing method thereof Download PDFInfo
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- CN113817248A CN113817248A CN202111036875.3A CN202111036875A CN113817248A CN 113817248 A CN113817248 A CN 113817248A CN 202111036875 A CN202111036875 A CN 202111036875A CN 113817248 A CN113817248 A CN 113817248A
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- pipeline
- polyethylene
- sewage treatment
- starch
- plastic layer
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- 239000010865 sewage Substances 0.000 title claims abstract description 70
- 238000003672 processing method Methods 0.000 title abstract description 5
- -1 polyethylene Polymers 0.000 claims abstract description 54
- 239000004698 Polyethylene Substances 0.000 claims abstract description 48
- 229920000573 polyethylene Polymers 0.000 claims abstract description 48
- 229920003023 plastic Polymers 0.000 claims abstract description 42
- 239000004033 plastic Substances 0.000 claims abstract description 42
- 229920002472 Starch Polymers 0.000 claims abstract description 37
- 235000019698 starch Nutrition 0.000 claims abstract description 37
- 239000008107 starch Substances 0.000 claims abstract description 37
- 239000004014 plasticizer Substances 0.000 claims abstract description 21
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000003963 antioxidant agent Substances 0.000 claims description 13
- 230000003078 antioxidant effect Effects 0.000 claims description 13
- 238000005469 granulation Methods 0.000 claims description 12
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- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 10
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 9
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920013716 polyethylene resin Polymers 0.000 claims description 8
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
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- 230000008569 process Effects 0.000 claims description 5
- 229920002261 Corn starch Polymers 0.000 claims description 4
- 239000008120 corn starch Substances 0.000 claims description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- AIBRSVLEQRWAEG-UHFFFAOYSA-N 3,9-bis(2,4-ditert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP1OCC2(COP(OC=3C(=CC(=CC=3)C(C)(C)C)C(C)(C)C)OC2)CO1 AIBRSVLEQRWAEG-UHFFFAOYSA-N 0.000 claims description 3
- ODJQKYXPKWQWNK-UHFFFAOYSA-L 3-(2-carboxylatoethylsulfanyl)propanoate Chemical compound [O-]C(=O)CCSCCC([O-])=O ODJQKYXPKWQWNK-UHFFFAOYSA-L 0.000 claims description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 claims description 3
- 240000003183 Manihot esculenta Species 0.000 claims description 3
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 125000004423 acyloxy group Chemical group 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 3
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical group OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 239000001993 wax Substances 0.000 claims description 3
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 2
- 241000894006 Bacteria Species 0.000 abstract description 18
- 239000002689 soil Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 244000005700 microbiome Species 0.000 description 6
- 239000000872 buffer Substances 0.000 description 3
- VUNPVKAEZHYYRV-UHFFFAOYSA-N 4-(3,5-ditert-butyl-4-hydroxyphenyl)-N-[6-[4-(3,5-ditert-butyl-4-hydroxyphenyl)butanoylamino]hexyl]butanamide Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCCC(=O)NCCCCCCNC(=O)CCCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 VUNPVKAEZHYYRV-UHFFFAOYSA-N 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 229910001385 heavy metal Inorganic materials 0.000 description 1
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- 235000015097 nutrients Nutrition 0.000 description 1
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- 238000000746 purification Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a general shape other than plane
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention discloses a pipeline for sewage treatment, which comprises a polyethylene layer and a modified plastic layer which are arranged in a layered manner, wherein the modified plastic layer comprises the following components in percentage by weight: 60-70% of polyethylene, 20-30% of starch, 5-10% of diatomite, 2-3% of plasticizer and 1-1.5% of dispersant, and also discloses a processing method of the pipeline; the pipeline only has a two-layer structure, and due to the arrangement of the inner layer structure of the modified plastic layer, a bacteria culture and bacteria living space can be formed in the pipeline, so that bacteria culture and sewage treatment in the pipeline are realized, the pipeline can be paved and used as a main urban sewage discharge pipeline, the double-layer effect of sewage discharge and treatment is realized, a large-scale sewage treatment system is prevented from being built above the ground surface, the sewage treatment and the sewage conveying are carried out in a relatively sealed manner, the phenomena of peculiar smell, leakage and the like caused by the direct contact of the sewage with the external atmosphere and a tank body are avoided, and the pollution risk to the surrounding air, soil and the like is eliminated.
Description
Technical Field
The invention relates to the technical field of sewage treatment equipment, in particular to a pipeline for sewage treatment and a processing method of the pipeline.
Background
There are two treatment methods commonly used in current sewage treatment: firstly, through adding chemical reagent to in the sewage, utilize the pending composition reaction in chemical reagent and the sewage, produce the dross, borrow the sediment equipment of scraping that sets up specially again, with dross and separation of water, scrape the sediment through multistage multilayer and separate the back, realize sewage purification, reach and discharge or reutilization standard. Secondly, performing directional bacteria culture according to components needing to be separated in the sewage, adding the directionally cultured bacteria into the sewage according to a proportion, and utilizing harmful substances in the edible sewage of the bacteria to achieve the aim of purifying the sewage.
However, both of the above two sewage treatment methods require a special treatment tank, and even a buffer tank and a dosing tank before treatment, a first-stage or even multi-stage intermediate tank during treatment, a clean water tank after treatment, and the like, which are arranged in a matching manner, so that the treatment system is large, underground and part of above-ground space resources are occupied, and the sewage treatment process is open-type treatment, and the sewage is in direct contact with the external atmosphere and a tank body, so that the phenomena of peculiar smell, leakage and the like are inevitably generated, and the pollution to the surrounding air, soil and the like is caused to different degrees.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a sewage treatment pipeline which integrates sewage discharge and treatment, and solves the problems that the traditional sewage treatment occupies too much land resources and has the risks of polluting the atmosphere and the surrounding soil.
In order to solve the technical problems, the technical scheme of the invention is as follows: the pipeline for sewage treatment comprises a polyethylene layer and a modified plastic layer fixedly sleeved in the polyethylene layer, wherein the modified plastic layer comprises the following components in percentage by weight: 60-70% of polyethylene, 20-30% of starch, 5-10% of diatomite, 2-3% of plasticizer and 1-1.5% of dispersing agent.
As a preferable technical scheme, the polyethylene is PE100 grade polyethylene resin or PE80 grade polyethylene resin;
the starch is corn starch or cassava starch.
Preferably, the plasticizer is one or more of dioctyl phthalate, di (2-ethylhexyl) phthalate, diethylene glycol, sorbitol ester, tri-n-butyl citrate, tetra-isopropyl n-titanate, isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and chlorinated paraffin.
As a preferable technical scheme, the dispersing agent is polyethylene wax or ethylene bis stearamide.
As a preferred technical scheme, the modified plastic layer also comprises an antioxidant, and the weight percentage of the antioxidant added is 0.2-0.5%.
Preferably, the antioxidant is pentaerythritol tetrakis (β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, 3, 5-di-tert-butyl-4-hydroxybenzyl isocyanurate, octadecyl β - (3, 5-di-tert-butyl-4-hydroxybenzyl) propionate, N,
-one or more of bis- (3- (3, 5-di-tert-butyl-4-hydroxybenzyl) propionyl) hexamethylenediamine, didodecanediol thiodipropionate, bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and tris (2, 4-tert-butylphenyl) phosphite.
As a preferred technical scheme, the raw material preparation process of the modified plastic layer comprises the following steps,
SPA1taking starch in percentage by weight, and drying the starch until the moisture content is less than 2%;
SPA2mixing the plasticizer with the dried starch in percentage by weight, heating at a temperature of not less than 85 ℃ until no water is analyzed;
SPA3pouring polyethylene, diatomite and a dispersing agent in percentage by weight, and starch and a plasticizer into a mixer for mixing for 5-10 minutes;
SPA4conveying the mixed materials to a granulator, and controlling the granulation temperature of the granulator to be 135-185 ℃, so as to complete granulation;
SPA5and drying the granules output by the granulator to obtain the processing raw material of the modified plastic layer. As a preferred technical scheme, the raw material preparation process of the modified plastic layer comprises the following steps,
SPB1taking starch in percentage by weight, and drying the starch until the moisture content is less than 2%;
SPB2mixing the plasticizer with the dried starch in percentage by weight, heating at a temperature of not less than 85 ℃ until no water is analyzed;
SPB3pouring polyethylene, diatomite, a dispersant and an antioxidant in percentage by weight, and starch and a plasticizer into a mixer for mixing for 5-10 minutes;
SPB4conveying the mixed materials to a granulator, and controlling the granulation temperature of the granulator to be 135-185 ℃, so as to complete granulation;
SPB5and drying the granules output by the granulator to obtain the processing raw material of the modified plastic layer.
The invention also relates to a processing method of the pipeline for sewage treatment, which comprises the following steps,
SPC1drying the processing raw material of the modified plastic layer in an environment with the temperature of 95-110 ℃ until the moisture content is lower than 0.15%;
placing the polyethylene material forming the polyethylene layer in a temperature environment of 75-85 ℃ for drying until the moisture content is lower than 0.15%;
SPC2arranging two extruders which share the same extruder head die;
SPC3putting the processing raw material of the modified plastic layer into one of the extruders, and setting the extrusion temperature at 130-180 ℃;
placing the polyethylene into another extruder, and setting the extrusion temperature of the polyethylene to be 150-230 ℃;
setting the temperature of an extruder head die at 175-220 ℃, and starting each extruder;
SPC4adjusting the out-of-roundness and the wall thickness of the pipeline in the process of extruding the pipeline by using the extruder;
SPC5and after the out-of-roundness and the wall thickness are adjusted, the extruded pipeline is sequentially subjected to vacuum sizing, cooling, traction and fixed-length cutting, and then the pipeline for sewage treatment is obtained.
As an improvement to the above technical solution, the thickness of the polyethylene layer is greater than the thickness of the modified plastic layer.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the pipeline only has two-layer structure, namely an outer polyethylene layer and an inner modified plastic layer, and due to the arrangement of the inner structure of the modified plastic layer, a bacteria culture and bacteria living space can be formed in the pipeline for analyzing the discharged sewage in advance and then directionally culturing functional bacteria and microorganisms to realize the bacteria culture and sewage treatment in the pipeline, the pipeline can be laid and used as a main pipeline for urban sewage discharge, and simultaneously the double-layer effect of sewage discharge and treatment is realized, thereby avoiding the special construction of large-scale sewage treatment systems such as a buffer pool, a dosing pool, a middle pool, a treatment pool, a clean water pool and the like above the ground surface, realizing the relative sealed implementation of sewage treatment and conveying, avoiding the phenomena of peculiar smell, leakage and the like caused by the direct contact of the sewage with the external atmosphere and the pool body, eliminating the pollution risks to the surrounding air, soil and the like, and after the production pipeline is laid and subjected to the bacterial reproduction treatment, the effective rate of sewage treatment is over 95 percent.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
Wherein:
FIG. 1 is a schematic cross-sectional structural view of an embodiment of the present invention;
in the figure: 1-a polyethylene layer; 2-modifying the plastic layer.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
The first embodiment is as follows:
as shown in fig. 1, the pipeline for sewage treatment comprises a polyethylene layer 1 and a modified plastic layer 2 fixedly sleeved in the polyethylene layer 1, wherein the modified plastic layer 2 comprises the following components in percentage by weight: 60-70% of polyethylene, 20-30% of starch, 5-10% of diatomite, 2-3% of plasticizer and 1-1.5% of dispersing agent. The polyethylene is PE100 grade polyethylene resin or PE80 grade polyethylene resin, and the material of the polyethylene layer 1 may also be PE100 grade polyethylene resin or PE80 grade polyethylene resin. The starch is corn starch or tapioca starch, and preferably corn starch is used. The thickness on polyethylene layer is greater than the thickness of modified plastic layer makes the polyethylene layer can regard as the outside inoxidizing coating of pipeline to use to guarantee the intensity and the life of whole pipeline.
The plasticizer in this embodiment is one or more of dioctyl phthalate, di (2-ethylhexyl) phthalate, diethylene glycol, sorbitol ester, tri-n-butyl citrate, tetraisopropyl orthotitanate, isopropyl tri (dioctyl pyrophosphato acyloxy) titanate, and chlorinated paraffin. The dispersing agent is polyethylene wax or ethylene bis stearamide.
The raw material components in the modified plastic layer are firstly processed into raw material particles, and then the raw material particles are processed and molded by an extruder. The modified plastic layer comprises 65% of polyethylene, 25% of starch, 7% of diatomite, 2% of plasticizer and 1% of dispersing agent. The raw material preparation process of the modified plastic layer comprises the following steps:
SPA1and taking the starch according to the weight percentage, and drying the starch until the moisture content is less than 2%.
SPA2And mixing the plasticizer with the dried starch in percentage by weight, heating at a temperature of not less than 85 ℃, and heating until no water is analyzed.
SPA3And pouring polyethylene, diatomite and a dispersing agent in percentage by weight, starch and a plasticizer into a mixer for mixing, wherein the mixing time is 5-10 minutes, and the quality is optimal when the mixture is mixed for 8 minutes.
SPA4And conveying the mixed material to a granulator, and controlling the granulation temperature of the granulator to be 135-185 ℃, such as 150 ℃ to complete granulation.
SPA5And drying the granules output by the granulator to obtain the processing raw material of the modified plastic layer.
Example two:
the difference between the embodiment and the embodiment I is that the modified plastic layer further comprises an antioxidant, and the weight percentage of the antioxidant added is 0.2-0.5%. The antioxidant is pentaerythritol tetrakis (beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, isocyanuric acid (3, 5-di-tert-butyl-4-hydroxybenzyl ester), octadecyl beta- (3, 5-di-tert-butyl-4-hydroxybenzyl) propionate, N
-one or more of bis- (3- (3, 5-di-tert-butyl-4-hydroxybenzyl) propionyl) hexamethylenediamine, didodecanediol thiodipropionate, bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and tris (2, 4-tert-butylphenyl) phosphite.
Specifically, the modified plastic layer comprises 64% of polyethylene, 25% of starch, 7% of diatomite, 2% of plasticizer, 1% of dispersant and 0.3% of antioxidant in percentage by weight. The raw material preparation process of the modified plastic layer comprises the following steps,
SPB1and taking the starch according to the weight percentage, and drying the starch until the moisture content is less than 2%.
SPB2And mixing the plasticizer with the dried starch in percentage by weight, heating at a temperature of not less than 85 ℃, and heating until no water is analyzed.
SPB3And pouring polyethylene, diatomite, a dispersing agent and an antioxidant in percentage by weight, starch and a plasticizer into a mixer together for mixing, wherein the mixing time is 5-10 minutes, and the quality is optimal when the mixture is mixed for 8 minutes.
SPB4And conveying the mixed material to a granulator, and controlling the granulation temperature of the granulator to be 135-185 ℃, such as 150 ℃ to complete granulation.
SPB5And drying the granules output by the granulator to obtain the processing raw material of the modified plastic layer.
The method for forming the pipeline by final processing in the first embodiment of the invention is similar to the method for forming the pipeline by final processing in the second embodiment of the invention, and comprises the following steps,
SPC1drying the processing raw material of the modified plastic layer in an environment with the temperature of 95-110 ℃, for example, drying at 105 ℃ until the water content is lower than 0.15%; and (3) drying the polyethylene material forming the polyethylene layer in an environment with the temperature of 75-85 ℃, such as 80 ℃ until the moisture is lower than 0.15%.
SPC2Two extruders are arranged and share the same extruder head die.
SPC3Putting the processing raw material of the modified plastic layer into one of the extruders, and setting the extrusion temperature at 130-180 ℃; placing the polyethylene into another extruder, and setting the extrusion temperature of the polyethylene to be 150-230 ℃; setting the temperature of the extrusion head die at 175-220 ℃, and starting each extruder. In this step, the modified plasticWhen the extrusion temperature of the material layer is set to be 150 ℃, the extrusion temperature of the polyethylene is set to be 200 ℃ and the temperature of the extrusion head die is set to be 200 ℃, the quality of the processed pipeline is the best.
SPC4And adjusting the out-of-roundness and the wall thickness of the pipeline in the process of extruding the pipeline by using the extruder.
SPC5And after the out-of-roundness and the wall thickness are adjusted, the extruded pipeline is sequentially subjected to vacuum sizing, cooling, traction and fixed-length cutting, and then the pipeline for sewage treatment is obtained.
The pipeline for sewage treatment formed by processing in the first embodiment and the second embodiment is used for laying a sewage treatment pipeline, after the pipeline is laid, microorganisms with related functions are scattered into sewage according to organic matter components, heavy metal components and the like which need to be removed in the internally conveyed sewage to be treated, the microorganisms are flushed into the laid pipeline along with the sewage to be treated, the bacteria are propagated while the sewage is conveyed, and the sewage is purified by the propagated bacteria. In the process, the diatomite in the polyethylene layer on the inner wall of the pipeline has high water absorbability, so that the water in the pipeline can be kept, and the starch provides nutrient substances such as microorganisms required by bacterial reproduction. After the sewage passes through the pipeline for sewage treatment for about 20 days, the polyethylene layer on the inner wall can form a plurality of tiny holes under the combined action of water and microorganisms, so that a guarantee is further provided for mass propagation of bacteria, and the effective treatment rate of the sewage is not lower than 95% after the pipeline for sewage treatment is put into use. The invention enables the pipeline to have only two-layer structure, namely the outer layer is a polyethylene layer, the inner layer is a modified plastic layer, and due to the arrangement of the inner layer structure of the modified plastic layer, a bacteria culture and bacteria living space can be formed in the pipeline for analyzing the discharged sewage and directionally culturing functional bacteria and microorganisms to realize the bacteria culture and sewage treatment in the pipeline, the pipeline can be used as a main pipeline for urban sewage discharge, and simultaneously realizes the double-layer effect of sewage discharge and treatment, thereby avoiding building large sewage treatment systems such as a special buffer tank, a dosing tank, an intermediate tank, a treatment tank, a clean water tank and the like above the ground surface, and carrying out the sewage treatment and the sewage conveying in a relatively sealed way, avoiding the phenomena of peculiar smell, leakage and the like caused by the direct contact of the sewage with the external atmosphere and the tank body, eliminating the pollution risks to the surrounding air, soil and the like, after the production pipeline is laid and subjected to the bacteria propagation treatment, the effective rate of sewage treatment is over 95 percent.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (10)
1. Pipeline for sewage treatment, its characterized in that: the modified plastic layer comprises a polyethylene layer and a modified plastic layer fixedly sleeved in the polyethylene layer, wherein the modified plastic layer comprises the following components in percentage by weight: 60-70% of polyethylene, 20-30% of starch, 5-10% of diatomite, 2-3% of plasticizer and 1-1.5% of dispersing agent.
2. A conduit for sewage treatment as claimed in claim 1 wherein: the polyethylene is PE100 grade polyethylene resin or PE80 grade polyethylene resin;
the starch is corn starch or cassava starch.
3. A conduit for sewage treatment as claimed in claim 1 wherein: the plasticizer is one or more of dioctyl phthalate, di (2-ethylhexyl) phthalate, diethylene glycol, sorbitol ester, tri-n-butyl citrate, tetra-isopropyl orthotitanate, isopropyl tri (dioctyl pyrophosphato acyloxy) titanate and chlorinated paraffin.
4. A conduit for sewage treatment as claimed in claim 1 wherein: the dispersing agent is polyethylene wax or ethylene bis stearamide.
5. A conduit for sewage treatment as claimed in claim 1 wherein: the modified plastic layer also comprises an antioxidant, and the weight percentage of the antioxidant added is 0.2-0.5%.
6. A conduit for sewage treatment as claimed in claim 5 wherein: the antioxidant is pentaerythritol tetrakis (beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, isocyanuric acid (3, 5-di-tert-butyl-4-hydroxybenzyl ester), octadecyl (beta- (3, 5-di-tert-butyl-4-hydroxybenzyl) propionate, or a mixture thereof,
One or more of didodecanediol thiodipropionate, bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite and tris (2, 4-tert-butylphenyl) phosphite.
7. A conduit for sewage treatment as claimed in claim 1 wherein: the raw material preparation process of the modified plastic layer comprises the following steps,
SPA1taking starch in percentage by weight, and drying the starch until the moisture content is less than 2%;
SPA2mixing the plasticizer with the dried starch in percentage by weight, heating at a temperature of not less than 85 ℃ until no water is analyzed;
SPA3pouring polyethylene, diatomite and a dispersing agent in percentage by weight, and starch and a plasticizer into a mixer for mixing for 5-10 minutes;
SPA4conveying the mixed materials to a granulator, and controlling the granulation temperature of the granulator to be 135-185 ℃, so as to complete granulation;
SPA5and drying the granules output by the granulator to obtain the processing raw material of the modified plastic layer.
8. A conduit for sewage treatment as claimed in claim 5 wherein: the raw material preparation process of the modified plastic layer comprises the following steps,
SPB1taking starch in percentage by weight, and drying the starch until the moisture content is less than 2%;
SPB2mixing the plasticizer with the dried starch in percentage by weight, heating at a temperature of not less than 85 ℃ until no water is analyzed;
SPB3pouring polyethylene, diatomite, a dispersant and an antioxidant in percentage by weight, and starch and a plasticizer into a mixer for mixing for 5-10 minutes;
SPB4conveying the mixed materials to a granulator, and controlling the granulation temperature of the granulator to be 135-185 ℃, so as to complete granulation;
SPB5and drying the granules output by the granulator to obtain the processing raw material of the modified plastic layer.
9. The method for processing a pipeline for sewage treatment as set forth in claim 7 or 8, wherein: comprises the following steps of (a) carrying out,
SPC1drying the processing raw material of the modified plastic layer in an environment with the temperature of 95-110 ℃ until the moisture content is lower than 0.15%;
placing the polyethylene material forming the polyethylene layer in a temperature environment of 75-85 ℃ for drying until the moisture content is lower than 0.15%;
SPC2arranging two extruders which share the same extruder head die;
SPC3putting the processing raw material of the modified plastic layer into one of the extruders, and setting the extrusion temperature at 130-180 ℃;
placing the polyethylene into another extruder, and setting the extrusion temperature of the polyethylene to be 150-230 ℃;
setting the temperature of an extruder head die at 175-220 ℃, and starting each extruder;
SPC4adjusting the out-of-roundness and the wall thickness of the pipeline in the process of extruding the pipeline by using the extruder;
SPC5and after the out-of-roundness and the wall thickness are adjusted, the extruded pipeline is sequentially subjected to vacuum sizing, cooling, traction and fixed-length cutting, and then the pipeline for sewage treatment is obtained.
10. A method of processing a pipeline for sewage treatment as claimed in claim 9, wherein: the thickness of the polyethylene layer is larger than that of the modified plastic layer.
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| CN202111036875.3A CN113817248A (en) | 2021-09-06 | 2021-09-06 | Pipeline for sewage treatment and processing method thereof |
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| CN202111036875.3A CN113817248A (en) | 2021-09-06 | 2021-09-06 | Pipeline for sewage treatment and processing method thereof |
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Application publication date: 20211221 |