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Preparation method of fly ash-based adsorption material

An adsorption material and fly ash technology, applied in chemical instruments and methods, adsorption water/sewage treatment, fuel, etc., can solve the problems of secondary environmental pollution, waste of resources, etc., achieve low cost, reduce emissions, and reduce CO2 emissions Effect

Pending Publication Date: 2021-11-02
ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fly ash is mainly disposed of by local burial or centralized stacking, which not only causes a waste of resources, but also easily causes secondary environmental pollution problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The invention provides a method for preparing a fly ash-based adsorption material, which uses biomass fly ash as a raw material, mixes it with carapace, crushes it and sieves it, screens the mixture whose particle size is less than or equal to a preset value, and performs ultrasonic vibration treatment in a strong alkali solution T 1 hours, then stir T 2 After 1 hour, filter and rinse until neutral, vacuum dry it, place it in an activation device, pass biogas slurry at 600-900°C for 1-2 hours, and obtain purified water after condensation of biogas slurry steam, and fly ash in an inert atmosphere Cool to normal temperature to obtain fly ash-based adsorption material.

[0032] The above fly ash comes from biomass power plants.

[0033] The above pulverization refers to pulverization by a ball mill, preferably dry ball mill pulverization. On the one hand, ball milling can reduce the particle size of fly ash or mixture, so that the particle size of fly ash is uniform; C...

Embodiment 1

[0048] Using biomass power plant fly ash as raw material, mix the ash shell with crab shell at a mass ratio of 10:1, ball mill and sieve, and screen the mixture with a particle size less than or equal to 0.2 mm. According to the ratio of the ash shell mixture to the alkali solution (1:1 ) g / mL, ultrasonically oscillate in 20 wt% KOH solution for 1 hour, then use a magnetic stirrer for 12 hours, then filter and rinse until neutral, vacuum dry at 70°C for 10 hours, and place it in a vertical activation device At 700°C, 20 mL / (h·g) was injected into the biogas slurry supernatant for 2 hours to activate, and the biogas slurry steam was condensed to obtain purified water, of which COD 69 mg·L -1 , NH 3 -N 12mg·L -1 ; Fly ash was cooled to room temperature in a nitrogen atmosphere to obtain a fly ash-based adsorption material with synergistic biogas slurry purification, with a specific surface area of ​​367 m 2 / g. Use of adsorbent materials for biogas (CO 2 30%, the rest is CH ...

Embodiment 2

[0053] Using biomass power plant fly ash as raw material, the mass ratio of ash shell and lobster shell is mixed with 10:1, ball milled and sieved, and the mixture with particle size less than or equal to 0.2 mm is screened. According to the ratio of ash shell mixture to alkali solution (1:3 ) g / mL, ultrasonically oscillated in 10 wt% NaOH solution for 1 hour, then stirred with a magnetic stirrer for 12 hours, then filtered and washed until neutral, vacuum dried at 70°C for 6 hours, and then placed in a vertical activation device At 700°C, pass through biogas slurry supernatant at 20 mL / (h·g) for 2 hours to activate, and the biogas slurry steam is condensed to obtain purified water, of which COD 81 mg·L -1 , NH 3 -N 14mg·L -1 ; The fly ash was cooled to room temperature in a nitrogen atmosphere to obtain a fly ash-based adsorption material with a synergistic biogas slurry purification, with a specific surface area of ​​385 m 2 / g. Use of adsorbent materials for biogas (CO ...

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Abstract

The invention belongs to the field of solid waste disposal, biogas purification and sewage treatment, and particularly relates to a preparation method of a fly ash-based adsorption material. Biomass fly ash is used as a raw material and is mixed with carapace, the mixture is crushed by a ball mill and sieved, after alkali treatment and drying, the fly ash is placed in an activation device, biogas slurry is introduced at the temperature of 600-900 DEG C for activation for 1-2 hours, and purified water and the fly ash-based adsorption material are obtained. The prepared adsorption material has good adsorption and removal effects on impurity gases such as CO2 in biogas, can purify biogas slurry in the preparation process, has the characteristics of low raw material price, simple preparation process and the like, and can realize resource utilization of fly ash and biogas slurry and efficient purification of biogas.

Description

technical field [0001] The invention belongs to the fields of solid waste disposal, biogas purification and sewage treatment, and specifically relates to a method for preparing a fly ash-based adsorption material for biogas decarbonization and biogas slurry purification. Background technique [0002] my country is rich in biomass resources, and produces about 5.5 billion tons of agricultural and forestry residues, domestic garbage, domestic sludge, livestock and poultry manure, and fruit and vegetable residues every year, equivalent to about 800 million tons of standard coal. Among them, 160 million tons of forestry residues, 980 million tons of agricultural residues, 500 million tons of domestic waste, and 3.8 billion tons of livestock and poultry manure. Biomass energy is the only green zero-carbon fuel in renewable energy. By coupling bioenergy and carbon capture and storage technology (BECCS), negative carbon emissions can be achieved, which is important for the realizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28C10L3/10
CPCB01J20/02C02F1/281C10L3/104B01J2220/4887B01J2220/4881Y02E50/30
Inventor 陈忠源李凯谢金恒党乐马善为佟敏陆强
Owner ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER
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