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Preparation method of wafer-shaped solid waste-based porous geopolymer pH regulator

A solid waste and geopolymer technology, applied in the field of pH regulators, can solve the problems of low pH buffer capacity and short duration, etc., and achieve the effects of simple operation, long pH adjustment time, and easy-to-obtain raw materials

Pending Publication Date: 2021-01-08
HARBIN ENG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the pH buffering capacity of the existing geopolymer is not high and the duration is not long as a pH regulator, and to provide a preparation of a disk-shaped solid waste-based porous geopolymer pH regulator method

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  • Preparation method of wafer-shaped solid waste-based porous geopolymer pH regulator
  • Preparation method of wafer-shaped solid waste-based porous geopolymer pH regulator

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specific Embodiment approach 1

[0032] Embodiment 1: The preparation method of a disc-shaped solid waste-based porous geopolymer pH regulator of the present embodiment is carried out according to the following steps:

[0033] One, the sodium hydroxide solution that concentration is 10mol / L and the sodium silicate aqueous solution that mass concentration is 40% mix uniformly and leave standstill for 1 day, obtain alkali excitation solution; The modulus of described sodium silicate aqueous solution is 2, so The mass ratio of described sodium hydroxide solution and sodium silicate aqueous solution is 1:1.5;

[0034] 2. Add slag powder to the alkali-activated solution in step 1, stir at 400rpm for 30min until evenly mixed to obtain a geopolymer slurry, then add polyoxyethylene sorbitan trioleate, adjust the rotating speed to 800rpm, and stir After 15min to mix evenly, obtain polymer slurry; The mass ratio of described alkali excitation solution and slag powder is 1:1; The mass ratio of described polyoxyethylene ...

specific Embodiment approach 2

[0038] Specific embodiment two: the preparation method of a disc-shaped solid waste-based porous geopolymer pH regulator of the present embodiment is carried out according to the following steps:

[0039] One, the sodium hydroxide solution that concentration is 8mol / L and the sodium silicate aqueous solution that mass concentration is 40% mix uniformly and leave standstill for 1 day, obtain alkali excitation solution; The modulus of described sodium silicate aqueous solution is 2.5, so The mass ratio of described sodium hydroxide solution and sodium silicate aqueous solution is 1:1;

[0040] 2. Add sludge powder and slag powder to the alkali-activated solution in step 1, stir at 500rpm for 60min until uniformly mixed to obtain geopolymer slurry, then add sodium lauroyl sarcosinate, stir at 700rpm for 15min until mixed After uniformity, polymer slurry is obtained; the sludge powder is obtained from municipal sludge through dehydration, drying, and drying to a water content of ≤...

specific Embodiment approach 3

[0045] Specific embodiment three: the preparation method of a disc-shaped solid waste-based porous geopolymer pH regulator of this embodiment is carried out according to the following steps:

[0046] One, the concentration is that the potassium hydroxide solution of 15mol / L and the potassium silicate aqueous solution that mass concentration is 40% are mixed evenly and then left standstill for 1 day to obtain an alkali excitation solution; the modulus of the potassium silicate aqueous solution is 3, so The mass ratio of potassium hydroxide solution and potassium silicate aqueous solution is 1:2;

[0047] 2. Add sludge powder and fly ash powder to the alkali excitation solution in step 1, stir at 400rpm for 90min until evenly mixed to obtain a geopolymer slurry, then add sodium cocoyl glycinate and hydrogen peroxide, and continue at 800rpm After stirring for 15 minutes until uniformly mixed, polymer slurry is obtained; the sludge powder is obtained by dehydrating, air-drying, an...

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Abstract

The invention relates to a preparation method of a wafer-shaped solid waste-based porous geopolymer pH regulator. The invention belongs to the field of pH regulators. The invention aims to solve the technical problems of low pH buffer capacity and short duration of existing geopolymers used as pH regulators. The method comprises the following steps: 1, preparing an alkali-activated solution; 2, adding solid waste powder into the alkali-activated solution, adding a foaming agent, and continuing stirring until solid waste powder and a foaming agent are uniformly mixed to obtain polymer slurry; 3, dropwise adding the polymer slurry into a preheated oil continuous phase at a constant speed, and conducting curing in a drying oven to obtain a regulator; and 4, removing the residual oil continuous phase on the surface, and conducting drying to obtain the wafer-shaped solid waste-based porous geopolymer pH regulator. According to the method, raw materials are easy to obtain, operation is simple, and the obtained regulator has a high-connectivity pore structure, high pH regulation capability and longer pH regulation time.

Description

technical field [0001] The invention belongs to the field of pH regulators, and in particular relates to a preparation method of a disk-shaped solid waste-based porous geological polymer pH regulator. Background technique [0002] Despite the growing awareness of the dangers of greenhouse gas emissions, our country's energy supply is currently still largely dependent on fossil fuels. Compared with traditional fossil fuels, biogas energy can significantly reduce greenhouse gas emissions, so it has become one of the ideal energy sources to replace fossil fuels in recent years. Biogas can be produced by anaerobic digestion (AD) of organic matter. The main products of the reaction are methane and carbon dioxide, while the production of hydrogen, nitrogen and their gaseous compounds is relatively low. Anaerobic digestion is a complex process whose process efficiency is strongly influenced by environmental conditions such as temperature, pH, volatile fatty acids (VFA), etc. In f...

Claims

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Application Information

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IPC IPC(8): C04B18/02
CPCC04B18/027C04B2103/0094C04B18/021C04B22/062C04B12/04C04B18/141C04B24/32C04B18/0427C04B24/123C04B18/08C04B22/068
Inventor 李欣羽尹学旺白成英乔英杰张欢董芯畅田鹏越王晓东张丽丽
Owner HARBIN ENG UNIV