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High-temperature heat transfer oil processed biochar and preparation method thereof

A heat transfer oil and biochar technology, which is applied in the petroleum industry, biofuels, indirect heating and dry distillation, etc., can solve the problems of atmospheric environmental pollution, uneven heating of materials, affecting production efficiency, etc., to achieve uniform heat transfer, good adsorption performance, The effect of improving the carbonization effect

Active Publication Date: 2018-12-25
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This heating method makes the material heated unevenly, which affects the production efficiency, and the exhaust gas generated during the combustion process will pollute the atmospheric environment.

Method used

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  • High-temperature heat transfer oil processed biochar and preparation method thereof
  • High-temperature heat transfer oil processed biochar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 As shown, this embodiment provides a high-temperature heat transfer oil carbonization device, which can be used to prepare biochar. The carbonization device includes a base 2 and an upper cover 3 detachably connected to the base. The base 2 and the upper cover 3 are connected by a flange or a screw connection, and this embodiment may preferably be a flange connection.

[0049] The base 2 is a cavity structure with an opening, and the upper cover 3 is placed at the opening of the base to form a closed space with the base; the cavity structure is used for placing high-temperature heat transfer oil 5 and plant fiber blocks 7 .

[0050] The cavity structure is also provided with a briquetting plate 6, which is used to prevent the buoyancy of the high-temperature heat-conducting oil to make the plant fiber block float on the surface of the high-temperature heat-conducting oil layer and contact with oxygen. The thickness direction of the briquetting plate 6 i...

Embodiment 2

[0054] This embodiment provides a method for processing biochar with high-temperature heat-conducting oil, comprising the following steps:

[0055] S1. Get 100kg of rice straw and break it into rice straw fibers with an average length of 15mm. Soak it in 10% NaOH solution at a temperature of 40°C for 1 hour at 1 atmosphere, then take it out and dry it to make its moisture content 0%.

[0056] S2. After the dry rice straw fiber and 8kg of wheat starch are blended uniformly in step S1, press into a cube fiber block, and the fiber block density is 0.5kg / m 3 ;

[0057] S3. Put the fiber block prepared in step S2 into the high-temperature heat transfer oil carbonization device described in Example 1, and fix it on the bottom of the carbonization device, and then inject alkyl biphenyl type heat transfer oil. The use temperature of the heat transfer oil is 330 ° C. The amount of heat transfer oil should be able to cover the fiber block completely, and then heat the heat transfer oil...

Embodiment 3

[0061] This embodiment provides a method for processing biochar with high-temperature heat-conducting oil, comprising the following steps:

[0062] S1. Take 100kg of stalks and crush them into straw fibers with an average length of 20mm, soak in 10% KOH solution at a temperature of 40°C for 1 hour at 1 atmospheric pressure, then take out and dry to make the moisture content 0%;

[0063] S2. After blending the straw fiber dried in step S1 with 8 kg of wheat starch evenly, press it into a cube fiber block, and the fiber block density is 0.5 kg / m 3 ;

[0064] S3. Put the fiber block prepared in step S2 into the high-temperature heat transfer oil carbonization device described in Example 1, and fix it on the bottom of the carbonization device, and then inject alkyl biphenyl type heat transfer oil. The use temperature of the heat transfer oil is 330 ° C. The amount of heat transfer oil should be able to cover the fiber block completely, and then heat the heat transfer oil to keep ...

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Abstract

The invention relates to the technical field of biochars, particularly to a high-temperature heat transfer oil processed biochar and a preparation method thereof. The high-temperature heat transfer oil processed biochar is prepared from plant fiber and starch. The preparation method of the high-temperature heat transfer oil processed biochar comprises shredding and soaking the plant fiber into aqueous alkali, and then drying the soaked plant fiber; uniformly mixing the dried plant fiber with the starch, performing compression molding to obtain a fiber block; fixing the fiber block onto the bottom inside a high-temperature heat transfer oil carbonizing device, and filling in high-temperature heat transfer oil to carbonize the fiber block; performing oil removal treatment on the carbonized fiber block. The prepared high-temperature heat transfer oil processed biochar is high in absorbing performance and can be widely applied to the fields such as sewage purification and human and animalexcreta disposal, thereby being high in promotional value.

Description

technical field [0001] The invention relates to the technical field of biochar, in particular to biochar processed with high-temperature heat-conducting oil and a preparation method thereof. Background technique [0002] As a large agricultural country, our country produces a large amount of agricultural and forestry waste such as straw and straw every year. However, a large amount of agricultural and forestry waste has not been effectively used, but is piled up in the fields to occupy a large amount of land resources, or directly burned, producing a large amount of greenhouse gases and causing great damage to the atmospheric environment. [0003] Biochar is a solid product produced by thermal cracking of biological organic materials in an anoxic or anaerobic environment. It can be used not only as a high-quality energy source and soil improver, but also as a reducing agent, fertilizer slow-release carrier and carbon dioxide sequestration agent. It has been widely used in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10B47/06
CPCC10B47/06C10B53/02Y02E50/10
Inventor 曾广胜谭益民
Owner HUNAN UNIV OF TECH
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