Oily sludge-based biochar as well as preparation method and application thereof

A biochar and oily sludge technology, applied in the field of soil remediation, can solve the problems of resource utilization of oily sludge and agricultural and forestry waste, and achieve the effects of strong practical value, increased oxygen content, and simple preparation process

Pending Publication Date: 2022-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of

Method used

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  • Oily sludge-based biochar as well as preparation method and application thereof
  • Oily sludge-based biochar as well as preparation method and application thereof
  • Oily sludge-based biochar as well as preparation method and application thereof

Examples

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Example Embodiment

[0025] The method for preparing oily sludge-based biochar provided by the present invention includes:

[0026] (1) in the presence of an activator, the solid residue obtained from the treatment of oily sludge by thermochemical cleaning method and / or solvent extraction method is mixed with biomass raw materials for co-pyrolysis, and the activator is a mixture of inorganic alkali and inorganic salt. mixture;

[0027] (2) Washing and drying the co-pyrolyzed product.

[0028] In a preferred embodiment of the present invention, the weight ratio of the solid residue to the biomass raw material is (1-5):1. Controlling the weight ratio of the solid residue to the biomass raw material within the above-mentioned preferred implementation range can further increase the specific surface area and the like of the obtained biochar.

[0029] In the present invention, the solid residue can be any conventional solid residue obtained by treating oily sludge by thermochemical cleaning method or ...

Example Embodiment

[0062] According to a particularly preferred embodiment of the present invention, the method comprises:

[0063] 1) the solid residue obtained after the oily sludge is subjected to thermochemical cleaning treatment, dried to a water content of 1-3% by weight and an oil content of 10-15% by weight;

[0064] Wherein, the specific steps of thermochemical cleaning treatment are:

[0065] i. Take oily sludge;

[0066] ii. get sodium silicate nonahydrate and add it to deionized water to make a chemical cleaning agent with a concentration of 7-10g / L; oily sludge and chemical cleaning agent are mixed in a weight ratio of 1:9-12 to obtain mixture B ;

[0067] iii. Put mixture B in a magnetic stirrer, stir at 450-550rpm at 60-70°C for 50-700min; after stirring, let it stand at room temperature for 1-5min, and then centrifuge it to remove the upper layer of liquid to obtain a solid residue.

[0068] 2) pulverize the apricot husks to a particle size of 30-40 mesh with a pulverizer, and...

Example Embodiment

[0077] Example 1

[0078] 1) The solid residue obtained after the oily sludge (composed of 70% by weight of oil content, 15.8% by weight of water content, 14.2% by weight of solid content, originating from Shanghai Baishawan Oil Station) is subjected to thermochemical cleaning and placed in Dry in an oven at 105°C until the water content is 9% by weight and the oil content is 30% by weight;

[0079] Wherein, the specific steps of thermochemical cleaning treatment are:

[0080] i. Take 1 weight part of oily sludge and 3 weight parts of naphtha, and mix to obtain mixture A1;

[0081] ii. Take an appropriate amount of cetyl trimethyl ammonium bromide and add it to 6 parts by weight of deionized water to make chemical cleaning agent 1 with a concentration of 6 g / L. Mix mixture A1 with chemical cleaning agent 1 (2:3 parts by weight) to obtain mixture B1;

[0082] iii. The mixture B1 was placed in a magnetic stirrer and stirred at a constant temperature of 60°C at 400rpm for 30mi...

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Abstract

The invention relates to the field of soil remediation, and discloses oily sludge-based biochar as well as a preparation method and application thereof. The method for preparing the oily sludge-based biochar comprises the following steps: (1) in the presence of an activating agent, mixing solid residues obtained by treating oily sludge through a thermochemical cleaning method and/or a solvent extraction method with a biomass raw material for co-pyrolysis, the activating agent being a mixture of inorganic base and inorganic salt; and (2) washing and drying a co-pyrolysis product. According to the invention, the resource utilization of the oily sludge is realized, and the environmental quality is ensured; the obtained biochar is large in specific surface area, metal or metal oxide can be loaded on the carrier, the variety and number of oxygen-containing functional groups are large, and the biochar has high practical value no matter adsorbing and solidifying heavy metal or serving as a catalytic material to oxidize organic matter.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to an oily sludge-based biochar, a preparation method and application thereof. Background technique [0002] Oily sludge is inevitably produced in the process of crude oil extraction, transportation, and processing, and the composition of oily sludge is complex and harmful. According to statistics, China's petrochemical industry produces about 3-5 million tons of oily sludge every year. Relevant laws and regulations require the harmless treatment of oily sludge. In the resource treatment technology, thermochemical cleaning and solvent extraction can recover the crude oil in the oil sludge, the operation method is simple, and it is easy to realize industrialization. However, the solid residue produced by these two technologies generally contains a certain amount of crude oil, so it cannot be discharged directly and must be treated in depth. However, there are very few studies on the...

Claims

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Application Information

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IPC IPC(8): C10B55/02B01J20/20B01J20/30B09C1/00B09C1/08C09K17/40B01J21/18B01J32/00B01J35/10
CPCC10B55/02B01J20/20B01J20/3078B01J20/28057B01J20/28061B01J20/28059B09C1/00B09C1/08C09K17/40B01J21/18B01J35/1019Y02W10/40C01B32/342C01B32/324
Inventor 苗杰陆语秦冰桑军强张峰王振宇沈明欢
Owner CHINA PETROLEUM & CHEM CORP
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