Method for preparing magnetic sludge-based biochar material from sludge and application of magnetic sludge-based biochar material

A biochar and sludge technology, applied in water/sludge/sewage treatment, water pollutants, pyrolysis sludge, etc., can solve the problem of high cost, achieve the effect of reducing the cost of preparation and the cost of preparation process

Active Publication Date: 2021-02-12
SHANGHAI FUTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, nano-magnetic core-shell materials are mainly prepared by industrial-grade chemicals with high cost, and the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0019] Specific implementation mode one: what this implementation mode records is a kind of method that sludge prepares magnetic sludge-based biochar material, and described method is specifically as follows:

[0020] Step 1: The pretreatment process of magnetic sludge-based biochar preparation, specifically in the following two forms:

[0021] Method 1: Prepare magnetic sludge-based biochar from solid waste iron sources: dried sludge with a moisture content of less than 15% and solid iron sources are mechanically crushed and mixed evenly, and whether to add pore-forming agents can be decided according to needs;

[0022] Method 2: Prepare magnetic sludge-based biochar cores with cheap liquid waste iron sources: after dehydration / dried sludge and liquid iron sources are stirred and mixed evenly, heat-dry until the moisture content is lower than 15% and then crushed;

[0023] Step 2: The pyrolysis preparation process of magnetic sludge-based biochar materials, specifically in th...

specific Embodiment approach 2

[0026] Specific embodiment two: a method for preparing magnetic sludge-based biochar materials from sludge described in specific embodiment one, in step one, the solid iron source is hematite, rust, Bayer process red mud or high One or more of iron content fly ash.

specific Embodiment approach 3

[0027] Embodiment 3: In Embodiment 1, a method for preparing magnetic sludge-based biochar materials from sludge, in step 1, the liquid iron source is pickling wastewater.

[0028] Specific embodiment four: a kind of sludge described in specific embodiment one prepares the method for magnetic sludge-based biochar material, in step one, described pore-forming agent is a kind of in potassium hydroxide, phosphoric acid or zinc chloride or more.

[0029] Embodiment 5: In Embodiment 1, a method for preparing magnetic sludge-based biochar materials from sludge, in step 1, the mechanical pulverization is ball milling and mixing.

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Abstract

The invention discloses a method for preparing a magnetic sludge-based biochar material from sludge and the application of the magnetic sludge-based biochar material, and belongs to the technical field of sludge resource utilization. The invention aims to fully utilize municipal and industrial wastes such as sewage sludge, hematite, rust, Bayer process red mud, high-iron-content fly ash, picklingwastewater and the like, and prepare magnetic sludge-based biochar from a solid waste iron source: dried sludge with the water content of less than 15% and a solid iron source are mechanically crushedand uniformly mixed; continuous pyrolysis is carried out, the pyrolysis temperature is 400-800 DEG C, the solid material stays in the device for 20-120 min, and fine ball milling and smashing are carried out until the particle size is 100 [mu] m or below; in the nano Fe3O4 / magnetic sludge-based biochar core-shell material prepared by the method, both the material core and the shell have magnetism, so that efficient recycling can be realized.

Description

technical field [0001] The invention belongs to the technical field of sludge resource utilization, and in particular relates to a method for preparing a magnetic sludge-based biochar material from sludge and an application thereof. Background technique [0002] With the rapid growth of my country's sewage treatment scale, the output of sewage sludge has exceeded 30 million tons per year, and it is urgent to develop technologies for safe sludge treatment, disposal and resource utilization. At present, the material utilization of sewage sludge mainly includes the preparation of adsorption materials, catalytic materials and soil improvement materials. At present, adsorption materials and catalytic materials prepared from sludge generally have problems such as high preparation cost, low material performance, low material added value, and poor adaptability, making it difficult to achieve large-scale application. Nano-magnetic core-shell materials have high specific surface area...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J23/745C02F1/28C02F1/72B01J20/30
CPCB01J20/20C02F1/283B01J20/28009B01J23/745B01J35/0033C02F1/725B01J35/008B01J21/18C02F1/288C02F1/488C02F2101/305C02F2101/105C02F11/10B01J20/02B01J20/3236B01J20/3295B01J2220/4887B01J20/3078B01J20/3021B01J20/3064
Inventor 许国仁张曌
Owner SHANGHAI FUTING TECH CO LTD
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