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Foamed sponge filler and preparation method thereof

A foaming sponge and foaming component technology, applied in the field of auxiliary materials for sewage treatment, can solve the problems of insufficient carbon source, decreased denitrification efficiency, increased operation control difficulty and operating cost, etc., to reduce the difficulty and cost of operation and maintenance. The effect of short production cycle, easy attachment and growth

Inactive Publication Date: 2020-09-04
华设设计集团环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of biofilm to treat sewage requires a large amount of organic carbon sources to be consumed in the denitrification process, and when the C / N in the sewage water is low, the carbon sources required for the denitrification process are insufficient, resulting in a decrease in the denitrification efficiency, and additional supplements are required. Add carbon sources to ensure that the effluent TN and TP meet the standards, which increases the difficulty of operation control and operation costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0027] This implementation prepares polyurethane / rape straw foamed sponge filler, which uses polyurethane prepolymer as a matrix and mixes and foams rape straw as a dispersed phase. The preparation method includes the following steps:

[0028] 1) Rapeseed stalks were dried and dehydrated, treated with alkali, and pulverized to obtain 60-mesh rapeseed stalk particles.

[0029] 2) Stir and mix 100 parts of polyether triol, 60 parts of rape straw granules, and 80 parts of TDI at 25°C, then quickly add 4 parts of water, 0.18 parts of triethylenediamine, 3.8 parts of silicone oil, and 0.4 parts of stannous octoate , 35 parts of dichloromethane are stirred and mixed at a high speed, poured into a mold for foaming, solidified and shaped.

[0030] 3) Remove the mold, wash, dry, and cut into cubes with a side length of 1cm.

[0031] The prepared polyurethane / rape straw foamed sponge filler has an average pore diameter of 1.48mm, a porosity of 85%, and a tensile strength of 0.32MPa.

specific Embodiment 2

[0033] This implementation prepares polyurethane / wheat straw foamed sponge filler, which is formed by mixing and foaming polyurethane prepolymer as a matrix and wheat straw as a dispersed phase. Its preparation method comprises the following steps:

[0034] 1) Wheat straw was dried and dehydrated, treated with alkali and crushed to obtain 100-mesh wheat straw particles.

[0035] 2) Stir and mix 100 parts of polyether triol, 40 parts of wheat straw granules, and 100 parts of TDI at 25°C, then quickly add 6 parts of water, 0.18 parts of triethylenediamine, 3.8 parts of silicone oil, and 0.4 parts of stannous octoate , 25 parts of dichloromethane are stirred and mixed at a high speed, poured into a mold for foaming, solidified and shaped.

[0036] 3) Remove the mold, wash, dry, and cut into cubes with a side length of 1cm.

[0037] The prepared polyurethane / wheat straw foamed sponge filler has an average pore diameter of 0.73mm, a porosity of 69%, and a tensile strength of 0.22...

specific Embodiment 3

[0039] This implementation prepares polyurethane / rice straw foamed sponge filler, which is formed by mixing and foaming polyurethane prepolymer as a matrix and rice straw as a dispersed phase. Its preparation method comprises the following steps:

[0040] 1) The rice straw is dried and dehydrated, treated with alkali and pulverized to obtain 80-mesh rice straw particles.

[0041] 2) Stir and mix 100 parts of polyether triol, 80 parts of rape straw granules, and 120 parts of TDI at 25°C, then quickly add 10 parts of water, 0.18 parts of triethylenediamine, 3.8 parts of silicone oil, and 0.4 parts of stannous octoate , 40 parts of dichloromethane are stirred and mixed at a high speed, poured into a mold for foaming, solidified and shaped.

[0042] 3) Remove the mold, wash, dry, and cut into cubes with a side length of 1cm.

[0043] The prepared polyurethane / rice straw foamed sponge filler has an average pore diameter of 1.76mm, a porosity of 92%, and a tensile strength of 0.31...

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Abstract

The invention discloses a preparation method of a foamed sponge filler. The preparation method comprises the following steps: a, adding a plant fiber dispersion phase into a polymer foaming reaction solution; b, uniformly stirring and dispersing the plant fibers, and then carrying out foaming reaction; and c, performing curing and shaping. The polymer foaming reaction solution comprises but is notlimited to a polyurethane prepolymer, an EVA foaming component, a PVA foaming component or a melamine foaming component. The plant fiber dispersion phase comprises but is not limited to wheat straw,rice straw, corn straw, rape straw, cotton straw or corncob, and the particle size of the plant fiber dispersion phase is 20-120 meshes. The invention further discloses the foamed sponge filler whichis prepared by the preparation method. According to the foamed sponge filler and the preparation method thereof provided by the invention, attachment and survival of microorganisms are facilitated, the foamed sponge filler also has a carbon source slow-release function, additional carbon sources can be reduced in the sewage treatment process, and the sewage treatment effect is ensured.

Description

technical field [0001] The invention relates to a foamed sponge filler and a preparation method thereof, in particular to a foamed sponge filler for water treatment with functions of microorganism attachment carrier and carbon source sustained release and a preparation method thereof, belonging to the technical field of auxiliary materials for sewage treatment. Background technique [0002] With the development of economy and the enhancement of people's environmental awareness, sewage treatment has become the focus of research. Biofilm method is one of the most commonly used sewage treatment processes at present. Biofilm method uses filler as an important carrier of microorganisms. The performance of filler and the biomass loaded will directly affect the quality of effluent water. In the biofilm water treatment process, compared with other fillers, the sponge filler has a very high specific surface area and porosity, which can achieve a good separation from water while maint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L97/02C08G18/76C08G18/48C08J9/14C08J9/08C08L23/08C08L23/06C08K13/02C08K3/22C08K5/09C08K5/098C08K5/14C08L29/04C08L61/28C08G101/00
CPCC08G18/4829C08G18/7614C08G2101/00C08J9/0023C08J9/0061C08J9/0066C08J9/0095C08J9/08C08J9/103C08J9/141C08J9/145C08J2203/02C08J2203/04C08J2203/14C08J2203/142C08J2203/18C08J2323/08C08J2329/04C08J2361/28C08J2375/08C08J2397/02C08J2423/06C08J2497/02C08K5/09C08K5/098C08K5/14C08K13/02C08K2003/2296
Inventor 黎鹏王霞邬剑宇曹亚丽王磊周超吴良杨力凯赵雨
Owner 华设设计集团环境科技有限公司
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