Method for preparing acetic acid activation sludge-based adsorbent

A technology for activating sludge and adsorbents, applied in chemical instruments and methods, and other chemical processes, can solve the problems of sludge energy treatment limitations, huge energy consumption, environmental pollution, etc., and achieve reduction of sludge drying process, Energy-saving and easy-to-operate effects

Inactive Publication Date: 2016-08-03

张能力

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AI-Extracted Technical Summary

Problems solved by technology

However, in addition to requiring huge energy consumption, the conventional sludge drying treatment method causes a lot of pollution to the environment, such as a large amount of water ...

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Abstract

The invention discloses a preparation method of an acetic acid-activated sludge-based adsorbent. The specific steps are as follows: taking an appropriate amount of sludge and glacial acetic acid to obtain a homogeneous acetic acid-activated sludge slurry; drying the homogeneous acetic acid-activated sludge slurry to obtain dry sewage Sludge and pulverize, and screen out sludge particles with a particle diameter of 1-2mm; add an activator solution compounded with zinc chloride and sulfuric acid, and perform pyrolysis reaction under nitrogen atmosphere to obtain sludge pyrolysis residue; wash with distilled water after grinding ,dry. The invention has simple manufacturing process and convenient operation. It adopts wet sludge to be directly pyrolyzed without drying treatment. The pyrolysis temperature is low, which belongs to low-temperature pyrolysis. While reducing the sludge drying process, it saves a lot of energy and is more energy-saving and environmentally friendly. The sludge adsorbent is prepared by the chemical activation method of the compound activator, and the carbon-containing compounds in the sludge are condensed into non-volatile polycondensation carbon through dehydration, condensation, moistening and expansion of chemical agents, so as to obtain adsorption with a well-developed porous structure. agent.

Application Domain

Other chemical processes

Technology Topic

ChemistryNitrogen atmosphere +14

Examples

Experimental program(5)

Example Embodiment

[0018] Example 1

[0019] A preparation method of an acetic acid activated sludge-based adsorbent, the specific steps are as follows:

[0020] (1) Take an appropriate amount of sludge, adjust the moisture content of the sludge to 88%, make a slurry, place it in a smashing homogenizer, take the glacial acetic acid according to the mass ratio of the slurry and the glacial acetic acid to 1:0.5, and add the glacial acetic acid to it. In the mud, placed in a smashing and homogenizing machine, smashing and homogenizing for 20 minutes, ultrasonically oscillating for 40 minutes, airtight, and soaking for 12 hours at 50 °C to obtain a homogeneous acetic acid activated sludge slurry;

[0021] (2) The homogeneous acetic acid activated sludge slurry was placed in an oven with a temperature of 100 ° C for constant temperature drying for 20 hours to obtain dry sludge with a moisture content of less than 5%, and then the dry sludge was pulverized in a pulverizer, and pulverized The particle size is 2mm;

[0022] (3) screening, put the dry sludge particles with a particle size of 2mm into a circular screening machine for particle screening, and screen out the sludge particles with a particle diameter of 1mm for use;

[0023] (4) Add the activator solution compounded by zinc chloride and sulfuric acid to the sludge particles at a mass ratio of 1:2.5. The compound volume ratio of zinc chloride and sulfuric acid is 1:1, and the concentrations of zinc chloride and sulfuric acid are both 5mol/L, after immersion at room temperature for 18h, remove the suspension liquid, and dry at 95℃ for 2h;

[0024] (5) Carry out pyrolysis reaction under nitrogen atmosphere: heating rate 65°C/min, pyrolysis temperature 550°C, stay for 10min, nitrogen blowing rate 25m1/min, close the tube furnace and nitrogen bottle switch after the reaction is completed, and obtain after cooling Sludge pyrolysis residue;

[0025] (6) collecting sludge pyrolysis residue for grinding, passing through a 50-mesh sieve to obtain sludge residue particles;

[0026] (7) Wash the sludge residue particles with distilled water until the washing liquid is neutral, and after drying, the prepared sludge-based adsorbent is obtained.

Example Embodiment

[0027] Example 2

[0028] A preparation method of an acetic acid activated sludge-based adsorbent, the specific steps are as follows:

[0029] (1) Take an appropriate amount of sludge, adjust the moisture content of the sludge to 89%, make a slurry, place it in a smashing homogenizer, take the glacial acetic acid according to the mass ratio of the slurry to the glacial acetic acid 1:0.6, and add the glacial acetic acid to it. The slurry was placed in a smashing homogenizer, smashed and homogenized for 25 minutes, ultrasonically vibrated for 45 minutes, sealed, and soaked for 13 hours at 52 °C to obtain a homogeneous acetic acid activated sludge slurry;

[0030] (2) The homogeneous acetic acid activated sludge slurry was placed in an oven with a temperature of 105 ° C for constant temperature drying for 21 hours to obtain dry sludge with a moisture content of less than 5%, and then the dry sludge was pulverized in a pulverizer, and pulverized The particle size is 3mm;

[0031] (3) Screening, put dry sludge particles with a particle size of 3 mm into a circular screening machine for particle screening, and screen out sludge particles with a particle diameter of 1.2 mm for use;

[0032] (4) Add the activator solution compounded by zinc chloride and sulfuric acid to the sludge particles at a mass ratio of 1:2.5, the compound volume ratio of zinc chloride and sulfuric acid is 1.2:1, and the concentrations of zinc chloride and sulfuric acid are both 5mol/L, after immersion at room temperature for 19h, remove the suspended liquid, and dry at 98°C for 2.5h;

[0033] (5) carry out pyrolysis reaction under nitrogen atmosphere: heating rate 68 ℃/min, pyrolysis temperature 552 ℃, stay for 12min, nitrogen blowing rate 26m1/min, close the tube furnace and nitrogen bottle switch after the reaction is completed, and obtain after cooling Sludge pyrolysis residue;

[0034] (6) collecting the sludge pyrolysis residue for grinding, and passing through a 55-mesh sieve to obtain sludge residue particles;

[0035] (7) Wash the sludge residue particles with distilled water until the washing liquid is neutral, and after drying, the prepared sludge-based adsorbent is obtained.

Example Embodiment

[0036] Example 3

[0037] A preparation method of an acetic acid activated sludge-based adsorbent, the specific steps are as follows:

[0038] (1) Take an appropriate amount of sludge, adjust the moisture content of the sludge to 90%, make a slurry, put it in a smashing homogenizer, take the glacial acetic acid according to the mass ratio of the slurry to the glacial acetic acid of 1:0.8, and add the glacial acetic acid to it. The slurry was placed in a smashing and homogenizing machine, smashed and homogenized for 30 minutes, ultrasonically vibrated for 50 minutes, sealed, and soaked for 14 hours at 55 °C to obtain a homogeneous acetic acid activated sludge slurry;

[0039] (2) The homogeneous acetic acid activated sludge slurry was placed in an oven with a temperature of 110 ° C for constant temperature drying for 22 hours to obtain dry sludge with a moisture content of less than 5%, and then the dry sludge was pulverized in a pulverizer to pulverize The particle size is 4mm;

[0040] (3) Screening, put the dry sludge particles with a particle size of 4 mm into a circular screening machine for particle screening, and screen out the sludge particles with a particle diameter of 1.5 mm for use;

[0041] (4) Add the activator solution compounded by zinc chloride and sulfuric acid to the sludge particles at a mass ratio of 1:2.5, the compound volume ratio of zinc chloride and sulfuric acid is 1.5:1, and the concentrations of zinc chloride and sulfuric acid are both 5mol/L, after immersion at room temperature for 20h, remove the suspended liquid, and dry at 100℃ for 3h;

[0042] (5) carry out pyrolysis reaction under nitrogen atmosphere: heating rate 70 ℃/min, pyrolysis temperature 555 ℃, stay for 15min, nitrogen blowing rate 28m1/min, close the tube furnace and nitrogen bottle switch after the reaction is completed, and obtain after cooling Sludge pyrolysis residue;

[0043] (6) collecting sludge pyrolysis residue for grinding, passing through a 60-mesh sieve to obtain sludge residue particles;

[0044] (7) Wash the sludge residue particles with distilled water until the washing liquid is neutral, and after drying, the prepared sludge-based adsorbent is obtained.

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PUM

Property	Measurement	Unit
Granularity	2.0 ~ 6.0	mm
Diameter	1.0 ~ 2.0	mm
Granularity	2.0	mm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Simple manufacturing process
Easy to operate

Semiconductor device, display device including the semiconductor device, display module including the display device, and electronic appliance including the semiconductor device, the display device, and the display module

ActiveUS20150263174A1Stable semiconductor characteristicSimple manufacturing processTransistorSolid-state devicesOxide semiconductorOxide

Owner:SEMICON ENERGY LAB CO LTD

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Low cost Save energy Nitrogen gas Sorbent Activated sludge Distilled water Char Biological activation

Method for preparing acetic acid activation sludge-based adsorbent

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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