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Method for preparing biochar through destructive distillation of oily sludge

A technology for biochar and oil sludge, which is applied in the fields of dewatering/drying/concentrating sludge treatment, water pollutants, pyrolysis sludge treatment, etc. low problems, to achieve the effect of harmless treatment, good porosity, and reduction of heavy metal element content

Active Publication Date: 2018-11-09
SCI RES ACADEMY OF GUANGXI ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a high energy utilization rate and no harmful gases such as dioxins and furans are produced, but the biochar formed has a low specific surface area and poor pore structure, which is not conducive to the development and utilization as an adsorption material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for dry distillation of oily sludge to prepare biochar, characterized in that it comprises the steps of:

[0036] (1) Selection of raw materials: The selected raw materials are composed of the following components by weight: 40 parts of oily sludge, 20 parts of biomass materials, and 8 parts of conditioner; the biomass materials used are corn stalks, pine nuts and pine wood according to the quality The mixture with a ratio of 1:3:5; the conditioner used is a mixture of calcium oxide, fly ash and hexaalkyltrimethylammonium bromide with a mass ratio of 8:2:1.

[0037] (2) Drying treatment: put conditioner into oily sludge, stir evenly and then dry at 110°C for 26 hours; dry biomass materials at 95°C for 26 hours; The moisture content of the raw material after drying treatment is 20%. Then the dried oily sludge and biomass materials are broken into 0.3mm solid particles.

[0038] (3) Activation treatment: Mix oily sludge and solid particles of biomass material, ...

Embodiment 2

[0044] A method for dry distillation of oily sludge to prepare biochar, characterized in that it comprises the steps of:

[0045] (1) Selection of raw materials: The selected raw materials are composed of the following components by weight: 42 parts of oily sludge, 26 parts of biomass materials, and 7 parts of conditioner; the biomass materials used are sorghum straw, chaff and sand wood according to The mass ratio is a mixture composed of 2:3:6; the conditioner used is a mixture composed of calcium oxide, fly ash and hexaalkyltrimethylammonium bromide in a mass ratio of 7:3:0.8.

[0046] (2) Drying treatment: put conditioner into oily sludge, stir evenly and then dry at 105°C for 24 hours; dry biomass materials at 93°C for 24 hours; The moisture content of the raw material after drying treatment is 22%. Then the dried oily sludge and biomass materials are broken into 0.4mm solid particles.

[0047] (3) Activation treatment: Mix oily sludge and solid particles of biomass mat...

Embodiment 3

[0053] A method for dry distillation of oily sludge to prepare biochar, characterized in that it comprises the steps of:

[0054] (1) Selection of raw materials: The selected raw materials are composed of the following components by weight: 35 parts of oily sludge, 30 parts of biomass materials, and 5 parts of conditioner; the biomass materials used are cassava stalks, macadamia nut shells and eucalyptus Wood is a mixture composed of a mass ratio of 1:2:5; the modifier used is a mixture of calcium oxide, fly ash and hexaalkyltrimethylammonium bromide in a mass ratio of 8:2:1.

[0055] (2) Drying treatment: put conditioner into oily sludge, stir evenly and then dry at 100°C for 26 hours; dry biomass materials at 90°C for 26 hours; The moisture content of the raw material after drying treatment is 25%. Then the dried oily sludge and biomass materials are broken into 0.8mm solid particles.

[0056] (3) Activation treatment: Mix oily sludge and solid particles of biomass materia...

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Abstract

The invention discloses a method for preparing biochar through destructive distillation of oily sludge, and belongs to the technical field of biochar. The method has the advantages that the oily sludge and biomass materials are utilized as raw materials which are subjected to steps such as drying, activating, destructive distillation, hydrochloric acid soaking and modification to prepare the biochar; the prepared biochar has large specific surface area, high porosity, high fixed proportion of heavy metal and low content of polycyclic aromatic hydrocarbon, and can serve as a heavy-metal ion adsorbent and a soil conditioner.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to the technical field of biochar, in particular to a method for dry distillation of oily sludge to prepare biochar. Background technique [0002] At present, with the advancement of science and technology, the amount of oily sludge discharged by the petrochemical industry is increasing. A large amount of oily sludge is discharged, which pollutes the environment. How to reduce the discharge of oily sludge has become a major problem for technicians in the petrochemical industry. , Oily sludge is different from ordinary oily sludge. The composition of oily sludge is extremely complex. It is an extremely stable suspension emulsion system, containing a large amount of aged crude oil, wax, asphaltene, colloid, solid suspended matter, Bacteria, salt, acid gas, corrosion products, etc., also include a large number of coagulants, corrosion inhibitors, scale inhibitors, bactericides and othe...

Claims

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Application Information

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IPC IPC(8): C01B32/05B01J20/20B01J20/28B01J20/30C02F1/28C02F11/10C02F11/14C09K17/02C02F101/20
CPCB01J20/20B01J20/28064C01B32/05C02F1/283C02F11/10C02F11/14C02F2101/20C09K17/02
Inventor 张立宏赵侣璇覃楠钧宋晓薇刘凯徐荣乐樊勇吉谢祎敏
Owner SCI RES ACADEMY OF GUANGXI ENVIRONMENTAL PROTECTION
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